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libvirt/src/qemu/qemu_driver.c
Jiri Denemark f0a3fe1b0a qemu: Use qemuDomainCheckABIStability where needed 
Most places which want to check ABI stability for an active domain need
to call this API rather than the original
qemuDomainDefCheckABIStability. The only exception is in snapshots where
we need to decide what to do depending on the saved image data.

https://bugzilla.redhat.com/show_bug.cgi?id=1460952

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
2017-06-14 17:13:24 +02:00

20901 lines
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/*
* qemu_driver.c: core driver methods for managing qemu guests
*
* Copyright (C) 2006-2016 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include <sys/types.h>
#include <sys/poll.h>
#include <sys/time.h>
#include <dirent.h>
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
#include <sys/un.h>
#include <byteswap.h>
#include "qemu_driver.h"
#include "qemu_agent.h"
#include "qemu_alias.h"
#include "qemu_block.h"
#include "qemu_conf.h"
#include "qemu_capabilities.h"
#include "qemu_command.h"
#include "qemu_parse_command.h"
#include "qemu_cgroup.h"
#include "qemu_hostdev.h"
#include "qemu_hotplug.h"
#include "qemu_monitor.h"
#include "qemu_process.h"
#include "qemu_migration.h"
#include "qemu_blockjob.h"
#include "qemu_security.h"
#include "virerror.h"
#include "virlog.h"
#include "datatypes.h"
#include "virbuffer.h"
#include "virhostcpu.h"
#include "virhostmem.h"
#include "virnetdevtap.h"
#include "virnetdevopenvswitch.h"
#include "capabilities.h"
#include "viralloc.h"
#include "viruuid.h"
#include "domain_conf.h"
#include "domain_audit.h"
#include "node_device_conf.h"
#include "virpci.h"
#include "virusb.h"
#include "virprocess.h"
#include "libvirt_internal.h"
#include "virxml.h"
#include "cpu/cpu.h"
#include "virsysinfo.h"
#include "domain_nwfilter.h"
#include "nwfilter_conf.h"
#include "virhook.h"
#include "virstoragefile.h"
#include "virfile.h"
#include "virfdstream.h"
#include "configmake.h"
#include "virthreadpool.h"
#include "locking/lock_manager.h"
#include "locking/domain_lock.h"
#include "virkeycode.h"
#include "virnodesuspend.h"
#include "virtime.h"
#include "virtypedparam.h"
#include "virbitmap.h"
#include "virstring.h"
#include "viraccessapicheck.h"
#include "viraccessapicheckqemu.h"
#include "storage/storage_driver.h"
#include "virhostdev.h"
#include "domain_capabilities.h"
#include "vircgroup.h"
#include "virperf.h"
#include "virnuma.h"
#include "dirname.h"
#include "network/bridge_driver.h"
#define VIR_FROM_THIS VIR_FROM_QEMU
VIR_LOG_INIT("qemu.qemu_driver");
#define QEMU_NB_MEM_PARAM 3
#define QEMU_NB_BLOCK_IO_TUNE_BASE_PARAMS 6
#define QEMU_NB_BLOCK_IO_TUNE_MAX_PARAMS 7
#define QEMU_NB_BLOCK_IO_TUNE_LENGTH_PARAMS 6
#define QEMU_NB_BLOCK_IO_TUNE_GROUP_PARAMS 1
#define QEMU_NB_BLOCK_IO_TUNE_ALL_PARAMS (QEMU_NB_BLOCK_IO_TUNE_BASE_PARAMS + \
QEMU_NB_BLOCK_IO_TUNE_MAX_PARAMS + \
QEMU_NB_BLOCK_IO_TUNE_GROUP_PARAMS + \
QEMU_NB_BLOCK_IO_TUNE_LENGTH_PARAMS)
#define QEMU_NB_NUMA_PARAM 2
#define QEMU_SCHED_MIN_PERIOD 1000LL
#define QEMU_SCHED_MAX_PERIOD 1000000LL
#define QEMU_SCHED_MIN_QUOTA 1000LL
#define QEMU_SCHED_MAX_QUOTA 18446744073709551LL
#define QEMU_GUEST_VCPU_MAX_ID 4096
#define QEMU_NB_BLKIO_PARAM 6
#define QEMU_NB_BANDWIDTH_PARAM 7
static void qemuProcessEventHandler(void *data, void *opaque);
static int qemuStateCleanup(void);
static int qemuDomainObjStart(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int flags,
qemuDomainAsyncJob asyncJob);
static int qemuDomainManagedSaveLoad(virDomainObjPtr vm,
void *opaque);
static int qemuOpenFileAs(uid_t fallback_uid, gid_t fallback_gid,
bool dynamicOwnership,
const char *path, int oflags,
bool *needUnlink, bool *bypassSecurityDriver);
static int qemuGetDHCPInterfaces(virDomainPtr dom,
virDomainObjPtr vm,
virDomainInterfacePtr **ifaces);
virQEMUDriverPtr qemu_driver = NULL;
static void
qemuVMDriverLock(void)
{}
static void
qemuVMDriverUnlock(void)
{}
static int
qemuVMFilterRebuild(virDomainObjListIterator iter, void *data)
{
return virDomainObjListForEach(qemu_driver->domains, iter, data);
}
static virNWFilterCallbackDriver qemuCallbackDriver = {
.name = QEMU_DRIVER_NAME,
.vmFilterRebuild = qemuVMFilterRebuild,
.vmDriverLock = qemuVMDriverLock,
.vmDriverUnlock = qemuVMDriverUnlock,
};
struct qemuAutostartData {
virQEMUDriverPtr driver;
virConnectPtr conn;
};
/**
* qemuDomObjFromDomain:
* @domain: Domain pointer that has to be looked up
*
* This function looks up @domain and returns the appropriate virDomainObjPtr
* that has to be released by calling virDomainObjEndAPI().
*
* Returns the domain object with incremented reference counter which is locked
* on success, NULL otherwise.
*/
static virDomainObjPtr
qemuDomObjFromDomain(virDomainPtr domain)
{
virDomainObjPtr vm;
virQEMUDriverPtr driver = domain->conn->privateData;
char uuidstr[VIR_UUID_STRING_BUFLEN];
vm = virDomainObjListFindByUUIDRef(driver->domains, domain->uuid);
if (!vm) {
virUUIDFormat(domain->uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s' (%s)"),
uuidstr, domain->name);
return NULL;
}
return vm;
}
/* Looks up the domain object from snapshot and unlocks the
* driver. The returned domain object is locked and ref'd and the
* caller must call virDomainObjEndAPI() on it. */
static virDomainObjPtr
qemuDomObjFromSnapshot(virDomainSnapshotPtr snapshot)
{
return qemuDomObjFromDomain(snapshot->domain);
}
/* Looks up snapshot object from VM and name */
static virDomainSnapshotObjPtr
qemuSnapObjFromName(virDomainObjPtr vm,
const char *name)
{
virDomainSnapshotObjPtr snap = NULL;
snap = virDomainSnapshotFindByName(vm->snapshots, name);
if (!snap)
virReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("no domain snapshot with matching name '%s'"),
name);
return snap;
}
/* Looks up snapshot object from VM and snapshotPtr */
static virDomainSnapshotObjPtr
qemuSnapObjFromSnapshot(virDomainObjPtr vm,
virDomainSnapshotPtr snapshot)
{
return qemuSnapObjFromName(vm, snapshot->name);
}
static int
qemuAutostartDomain(virDomainObjPtr vm,
void *opaque)
{
struct qemuAutostartData *data = opaque;
int flags = 0;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(data->driver);
int ret = -1;
if (cfg->autoStartBypassCache)
flags |= VIR_DOMAIN_START_BYPASS_CACHE;
virObjectLock(vm);
virObjectRef(vm);
virResetLastError();
if (vm->autostart &&
!virDomainObjIsActive(vm)) {
if (qemuProcessBeginJob(data->driver, vm,
VIR_DOMAIN_JOB_OPERATION_START) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to start job on VM '%s': %s"),
vm->def->name, virGetLastErrorMessage());
goto cleanup;
}
if (qemuDomainObjStart(data->conn, data->driver, vm, flags,
QEMU_ASYNC_JOB_START) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to autostart VM '%s': %s"),
vm->def->name, virGetLastErrorMessage());
}
qemuProcessEndJob(data->driver, vm);
}
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static void
qemuAutostartDomains(virQEMUDriverPtr driver)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
/* XXX: Figure out a better way todo this. The domain
* startup code needs a connection handle in order
* to lookup the bridge associated with a virtual
* network
*/
virConnectPtr conn = virConnectOpen(cfg->uri);
/* Ignoring NULL conn which is mostly harmless here */
struct qemuAutostartData data = { driver, conn };
virDomainObjListForEach(driver->domains, qemuAutostartDomain, &data);
virObjectUnref(conn);
virObjectUnref(cfg);
}
static int
qemuSecurityChownCallback(const virStorageSource *src,
uid_t uid,
gid_t gid)
{
virStorageSourcePtr cpy = NULL;
struct stat sb;
int save_errno = 0;
int ret = -1;
if (!virStorageFileSupportsSecurityDriver(src))
return 0;
if (virStorageSourceIsLocalStorage(src)) {
/* use direct chmod for local files so that the file doesn't
* need to be initialized */
if (!src->path)
return 0;
if (stat(src->path, &sb) >= 0) {
if (sb.st_uid == uid &&
sb.st_gid == gid) {
/* It's alright, there's nothing to change anyway. */
return 0;
}
}
if (chown(src->path, uid, gid) < 0)
goto cleanup;
} else {
if (!(cpy = virStorageSourceCopy(src, false)))
goto cleanup;
/* src file init reports errors, return -2 on failure */
if (virStorageFileInit(cpy) < 0) {
ret = -2;
goto cleanup;
}
if (virStorageFileChown(cpy, uid, gid) < 0)
goto cleanup;
}
ret = 0;
cleanup:
save_errno = errno;
virStorageFileDeinit(cpy);
virStorageSourceFree(cpy);
errno = save_errno;
return ret;
}
static int
qemuSecurityInit(virQEMUDriverPtr driver)
{
char **names;
virSecurityManagerPtr mgr = NULL;
virSecurityManagerPtr stack = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
unsigned int flags = 0;
if (cfg->allowDiskFormatProbing)
flags |= VIR_SECURITY_MANAGER_ALLOW_DISK_PROBE;
if (cfg->securityDefaultConfined)
flags |= VIR_SECURITY_MANAGER_DEFAULT_CONFINED;
if (cfg->securityRequireConfined)
flags |= VIR_SECURITY_MANAGER_REQUIRE_CONFINED;
if (virQEMUDriverIsPrivileged(driver))
flags |= VIR_SECURITY_MANAGER_PRIVILEGED;
if (cfg->securityDriverNames &&
cfg->securityDriverNames[0]) {
names = cfg->securityDriverNames;
while (names && *names) {
if (!(mgr = qemuSecurityNew(*names,
QEMU_DRIVER_NAME,
flags)))
goto error;
if (!stack) {
if (!(stack = qemuSecurityNewStack(mgr)))
goto error;
} else {
if (qemuSecurityStackAddNested(stack, mgr) < 0)
goto error;
}
mgr = NULL;
names++;
}
} else {
if (!(mgr = qemuSecurityNew(NULL,
QEMU_DRIVER_NAME,
flags)))
goto error;
if (!(stack = qemuSecurityNewStack(mgr)))
goto error;
mgr = NULL;
}
if (virQEMUDriverIsPrivileged(driver)) {
if (cfg->dynamicOwnership)
flags |= VIR_SECURITY_MANAGER_DYNAMIC_OWNERSHIP;
if (!(mgr = qemuSecurityNewDAC(QEMU_DRIVER_NAME,
cfg->user,
cfg->group,
flags,
qemuSecurityChownCallback)))
goto error;
if (!stack) {
if (!(stack = qemuSecurityNewStack(mgr)))
goto error;
} else {
if (qemuSecurityStackAddNested(stack, mgr) < 0)
goto error;
}
mgr = NULL;
}
driver->securityManager = stack;
virObjectUnref(cfg);
return 0;
error:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to initialize security drivers"));
virObjectUnref(stack);
virObjectUnref(mgr);
virObjectUnref(cfg);
return -1;
}
static int
qemuDomainSnapshotLoad(virDomainObjPtr vm,
void *data)
{
char *baseDir = (char *)data;
char *snapDir = NULL;
DIR *dir = NULL;
struct dirent *entry;
char *xmlStr;
char *fullpath;
virDomainSnapshotDefPtr def = NULL;
virDomainSnapshotObjPtr snap = NULL;
virDomainSnapshotObjPtr current = NULL;
unsigned int flags = (VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE |
VIR_DOMAIN_SNAPSHOT_PARSE_DISKS |
VIR_DOMAIN_SNAPSHOT_PARSE_INTERNAL);
int ret = -1;
virCapsPtr caps = NULL;
int direrr;
virObjectLock(vm);
if (virAsprintf(&snapDir, "%s/%s", baseDir, vm->def->name) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to allocate memory for "
"snapshot directory for domain %s"),
vm->def->name);
goto cleanup;
}
if (!(caps = virQEMUDriverGetCapabilities(qemu_driver, false)))
goto cleanup;
VIR_INFO("Scanning for snapshots for domain %s in %s", vm->def->name,
snapDir);
if (virDirOpenIfExists(&dir, snapDir) <= 0)
goto cleanup;
while ((direrr = virDirRead(dir, &entry, NULL)) > 0) {
/* NB: ignoring errors, so one malformed config doesn't
kill the whole process */
VIR_INFO("Loading snapshot file '%s'", entry->d_name);
if (virAsprintf(&fullpath, "%s/%s", snapDir, entry->d_name) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to allocate memory for path"));
continue;
}
if (virFileReadAll(fullpath, 1024*1024*1, &xmlStr) < 0) {
/* Nothing we can do here, skip this one */
virReportSystemError(errno,
_("Failed to read snapshot file %s"),
fullpath);
VIR_FREE(fullpath);
continue;
}
def = virDomainSnapshotDefParseString(xmlStr, caps,
qemu_driver->xmlopt,
flags);
if (def == NULL) {
/* Nothing we can do here, skip this one */
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to parse snapshot XML from file '%s'"),
fullpath);
VIR_FREE(fullpath);
VIR_FREE(xmlStr);
continue;
}
snap = virDomainSnapshotAssignDef(vm->snapshots, def);
if (snap == NULL) {
virDomainSnapshotDefFree(def);
} else if (snap->def->current) {
current = snap;
if (!vm->current_snapshot)
vm->current_snapshot = snap;
}
VIR_FREE(fullpath);
VIR_FREE(xmlStr);
}
if (direrr < 0)
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to fully read directory %s"),
snapDir);
if (vm->current_snapshot != current) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Too many snapshots claiming to be current for domain %s"),
vm->def->name);
vm->current_snapshot = NULL;
}
if (virDomainSnapshotUpdateRelations(vm->snapshots) < 0)
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Snapshots have inconsistent relations for domain %s"),
vm->def->name);
/* FIXME: qemu keeps internal track of snapshots. We can get access
* to this info via the "info snapshots" monitor command for running
* domains, or via "qemu-img snapshot -l" for shutoff domains. It would
* be nice to update our internal state based on that, but there is a
* a problem. qemu doesn't track all of the same metadata that we do.
* In particular we wouldn't be able to fill in the <parent>, which is
* pretty important in our metadata.
*/
virResetLastError();
ret = 0;
cleanup:
VIR_DIR_CLOSE(dir);
VIR_FREE(snapDir);
virObjectUnref(caps);
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainNetsRestart(virDomainObjPtr vm,
void *data ATTRIBUTE_UNUSED)
{
size_t i;
virDomainDefPtr def = vm->def;
virObjectLock(vm);
for (i = 0; i < def->nnets; i++) {
virDomainNetDefPtr net = def->nets[i];
if (virDomainNetGetActualType(net) == VIR_DOMAIN_NET_TYPE_DIRECT &&
virDomainNetGetActualDirectMode(net) == VIR_NETDEV_MACVLAN_MODE_VEPA) {
VIR_DEBUG("VEPA mode device %s active in domain %s. Reassociating.",
net->ifname, def->name);
ignore_value(virNetDevMacVLanRestartWithVPortProfile(net->ifname,
&net->mac,
virDomainNetGetActualDirectDev(net),
def->uuid,
virDomainNetGetActualVirtPortProfile(net),
VIR_NETDEV_VPORT_PROFILE_OP_CREATE));
}
}
virObjectUnlock(vm);
return 0;
}
static int
qemuDomainFindMaxID(virDomainObjPtr vm,
void *data)
{
int *driver_maxid = data;
if (vm->def->id > *driver_maxid)
*driver_maxid = vm->def->id;
return 0;
}
/**
* qemuStateInitialize:
*
* Initialization function for the QEmu daemon
*/
static int
qemuStateInitialize(bool privileged,
virStateInhibitCallback callback,
void *opaque)
{
char *driverConf = NULL;
virConnectPtr conn = NULL;
virQEMUDriverConfigPtr cfg;
uid_t run_uid = -1;
gid_t run_gid = -1;
char *hugepagePath = NULL;
size_t i;
if (VIR_ALLOC(qemu_driver) < 0)
return -1;
if (virMutexInit(&qemu_driver->lock) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("cannot initialize mutex"));
VIR_FREE(qemu_driver);
return -1;
}
qemu_driver->inhibitCallback = callback;
qemu_driver->inhibitOpaque = opaque;
qemu_driver->privileged = privileged;
if (!(qemu_driver->domains = virDomainObjListNew()))
goto error;
/* Init domain events */
qemu_driver->domainEventState = virObjectEventStateNew();
if (!qemu_driver->domainEventState)
goto error;
/* read the host sysinfo */
if (privileged)
qemu_driver->hostsysinfo = virSysinfoRead();
if (!(qemu_driver->config = cfg = virQEMUDriverConfigNew(privileged)))
goto error;
if (virAsprintf(&driverConf, "%s/qemu.conf", cfg->configBaseDir) < 0)
goto error;
if (virQEMUDriverConfigLoadFile(cfg, driverConf, privileged) < 0)
goto error;
VIR_FREE(driverConf);
if (virFileMakePath(cfg->stateDir) < 0) {
virReportSystemError(errno, _("Failed to create state dir %s"),
cfg->stateDir);
goto error;
}
if (virFileMakePath(cfg->libDir) < 0) {
virReportSystemError(errno, _("Failed to create lib dir %s"),
cfg->libDir);
goto error;
}
if (virFileMakePath(cfg->cacheDir) < 0) {
virReportSystemError(errno, _("Failed to create cache dir %s"),
cfg->cacheDir);
goto error;
}
if (virFileMakePath(cfg->saveDir) < 0) {
virReportSystemError(errno, _("Failed to create save dir %s"),
cfg->saveDir);
goto error;
}
if (virFileMakePath(cfg->snapshotDir) < 0) {
virReportSystemError(errno, _("Failed to create save dir %s"),
cfg->snapshotDir);
goto error;
}
if (virFileMakePath(cfg->autoDumpPath) < 0) {
virReportSystemError(errno, _("Failed to create dump dir %s"),
cfg->autoDumpPath);
goto error;
}
if (virFileMakePath(cfg->channelTargetDir) < 0) {
virReportSystemError(errno, _("Failed to create channel target dir %s"),
cfg->channelTargetDir);
goto error;
}
if (virFileMakePath(cfg->nvramDir) < 0) {
virReportSystemError(errno, _("Failed to create nvram dir %s"),
cfg->nvramDir);
goto error;
}
if (virFileMakePath(cfg->memoryBackingDir) < 0) {
virReportSystemError(errno, _("Failed to create memory backing dir %s"),
cfg->memoryBackingDir);
goto error;
}
qemu_driver->qemuImgBinary = virFindFileInPath("qemu-img");
if (!(qemu_driver->lockManager =
virLockManagerPluginNew(cfg->lockManagerName ?
cfg->lockManagerName : "nop",
"qemu",
cfg->configBaseDir,
0)))
goto error;
if (cfg->macFilter) {
if (!(qemu_driver->ebtables = ebtablesContextNew("qemu"))) {
virReportSystemError(errno,
_("failed to enable mac filter in '%s'"),
__FILE__);
goto error;
}
if (ebtablesAddForwardPolicyReject(qemu_driver->ebtables) < 0)
goto error;
}
/* Allocate bitmap for remote display port reservations. We cannot
* do this before the config is loaded properly, since the port
* numbers are configurable now */
if ((qemu_driver->remotePorts =
virPortAllocatorNew(_("display"),
cfg->remotePortMin,
cfg->remotePortMax,
0)) == NULL)
goto error;
if ((qemu_driver->webSocketPorts =
virPortAllocatorNew(_("webSocket"),
cfg->webSocketPortMin,
cfg->webSocketPortMax,
0)) == NULL)
goto error;
if ((qemu_driver->migrationPorts =
virPortAllocatorNew(_("migration"),
cfg->migrationPortMin,
cfg->migrationPortMax,
0)) == NULL)
goto error;
if (qemuSecurityInit(qemu_driver) < 0)
goto error;
if (!(qemu_driver->hostdevMgr = virHostdevManagerGetDefault()))
goto error;
if (!(qemu_driver->sharedDevices = virHashCreate(30, qemuSharedDeviceEntryFree)))
goto error;
if (qemuMigrationErrorInit(qemu_driver) < 0)
goto error;
if (privileged) {
char *channeldir;
if (chown(cfg->libDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to user %d:%d"),
cfg->libDir, (int) cfg->user,
(int) cfg->group);
goto error;
}
if (chown(cfg->cacheDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
cfg->cacheDir, (int) cfg->user,
(int) cfg->group);
goto error;
}
if (chown(cfg->saveDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
cfg->saveDir, (int) cfg->user,
(int) cfg->group);
goto error;
}
if (chown(cfg->snapshotDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
cfg->snapshotDir, (int) cfg->user,
(int) cfg->group);
goto error;
}
if (chown(cfg->autoDumpPath, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
cfg->autoDumpPath, (int) cfg->user,
(int) cfg->group);
goto error;
}
if (!(channeldir = mdir_name(cfg->channelTargetDir))) {
virReportOOMError();
goto error;
}
if (chown(channeldir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
channeldir, (int) cfg->user,
(int) cfg->group);
VIR_FREE(channeldir);
goto error;
}
VIR_FREE(channeldir);
if (chown(cfg->channelTargetDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
cfg->channelTargetDir, (int) cfg->user,
(int) cfg->group);
goto error;
}
if (chown(cfg->nvramDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
cfg->nvramDir, (int) cfg->user,
(int) cfg->group);
goto error;
}
if (chown(cfg->memoryBackingDir, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
cfg->memoryBackingDir, (int) cfg->user,
(int) cfg->group);
goto error;
}
run_uid = cfg->user;
run_gid = cfg->group;
}
qemu_driver->qemuCapsCache = virQEMUCapsCacheNew(cfg->libDir,
cfg->cacheDir,
run_uid,
run_gid);
if (!qemu_driver->qemuCapsCache)
goto error;
if ((qemu_driver->caps = virQEMUDriverCreateCapabilities(qemu_driver)) == NULL)
goto error;
if (!(qemu_driver->xmlopt = virQEMUDriverCreateXMLConf(qemu_driver)))
goto error;
/* If hugetlbfs is present, then we need to create a sub-directory within
* it, since we can't assume the root mount point has permissions that
* will let our spawned QEMU instances use it. */
for (i = 0; i < cfg->nhugetlbfs; i++) {
hugepagePath = qemuGetBaseHugepagePath(&cfg->hugetlbfs[i]);
if (!hugepagePath)
goto error;
if (virFileMakePath(hugepagePath) < 0) {
virReportSystemError(errno,
_("unable to create hugepage path %s"),
hugepagePath);
goto error;
}
if (privileged &&
virFileUpdatePerm(cfg->hugetlbfs[i].mnt_dir,
0, S_IXGRP | S_IXOTH) < 0)
goto error;
VIR_FREE(hugepagePath);
}
if (!(qemu_driver->closeCallbacks = virCloseCallbacksNew()))
goto error;
/* Get all the running persistent or transient configs first */
if (virDomainObjListLoadAllConfigs(qemu_driver->domains,
cfg->stateDir,
NULL, 1,
qemu_driver->caps,
qemu_driver->xmlopt,
NULL, NULL) < 0)
goto error;
/* find the maximum ID from active and transient configs to initialize
* the driver with. This is to avoid race between autostart and reconnect
* threads */
virDomainObjListForEach(qemu_driver->domains,
qemuDomainFindMaxID,
&qemu_driver->lastvmid);
virDomainObjListForEach(qemu_driver->domains,
qemuDomainNetsRestart,
NULL);
conn = virConnectOpen(cfg->uri);
/* Then inactive persistent configs */
if (virDomainObjListLoadAllConfigs(qemu_driver->domains,
cfg->configDir,
cfg->autostartDir, 0,
qemu_driver->caps,
qemu_driver->xmlopt,
NULL, NULL) < 0)
goto error;
virDomainObjListForEach(qemu_driver->domains,
qemuDomainSnapshotLoad,
cfg->snapshotDir);
virDomainObjListForEach(qemu_driver->domains,
qemuDomainManagedSaveLoad,
qemu_driver);
qemuProcessReconnectAll(conn, qemu_driver);
qemu_driver->workerPool = virThreadPoolNew(0, 1, 0, qemuProcessEventHandler, qemu_driver);
if (!qemu_driver->workerPool)
goto error;
virObjectUnref(conn);
virNWFilterRegisterCallbackDriver(&qemuCallbackDriver);
return 0;
error:
virObjectUnref(conn);
VIR_FREE(driverConf);
VIR_FREE(hugepagePath);
qemuStateCleanup();
return -1;
}
/**
* qemuStateAutoStart:
*
* Function to auto start the QEmu daemons
*/
static void
qemuStateAutoStart(void)
{
if (!qemu_driver)
return;
qemuAutostartDomains(qemu_driver);
}
static void qemuNotifyLoadDomain(virDomainObjPtr vm, int newVM, void *opaque)
{
virQEMUDriverPtr driver = opaque;
if (newVM) {
virObjectEventPtr event =
virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
VIR_DOMAIN_EVENT_DEFINED_ADDED);
qemuDomainEventQueue(driver, event);
}
}
/**
* qemuStateReload:
*
* Function to restart the QEmu daemon, it will recheck the configuration
* files and update its state and the networking
*/
static int
qemuStateReload(void)
{
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
if (!qemu_driver)
return 0;
if (!(caps = virQEMUDriverGetCapabilities(qemu_driver, false)))
goto cleanup;
cfg = virQEMUDriverGetConfig(qemu_driver);
virDomainObjListLoadAllConfigs(qemu_driver->domains,
cfg->configDir,
cfg->autostartDir, 0,
caps, qemu_driver->xmlopt,
qemuNotifyLoadDomain, qemu_driver);
cleanup:
virObjectUnref(cfg);
virObjectUnref(caps);
return 0;
}
/*
* qemuStateStop:
*
* Save any VMs in preparation for shutdown
*
*/
static int
qemuStateStop(void)
{
int ret = -1;
virConnectPtr conn;
int numDomains = 0;
size_t i;
int state;
virDomainPtr *domains = NULL;
unsigned int *flags = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(qemu_driver);
if (!(conn = virConnectOpen(cfg->uri)))
goto cleanup;
if ((numDomains = virConnectListAllDomains(conn,
&domains,
VIR_CONNECT_LIST_DOMAINS_ACTIVE)) < 0)
goto cleanup;
if (VIR_ALLOC_N(flags, numDomains) < 0)
goto cleanup;
/* First we pause all VMs to make them stop dirtying
pages, etc. We remember if any VMs were paused so
we can restore that on resume. */
for (i = 0; i < numDomains; i++) {
flags[i] = VIR_DOMAIN_SAVE_RUNNING;
if (virDomainGetState(domains[i], &state, NULL, 0) == 0) {
if (state == VIR_DOMAIN_PAUSED)
flags[i] = VIR_DOMAIN_SAVE_PAUSED;
}
virDomainSuspend(domains[i]);
}
ret = 0;
/* Then we save the VMs to disk */
for (i = 0; i < numDomains; i++)
if (virDomainManagedSave(domains[i], flags[i]) < 0)
ret = -1;
cleanup:
if (domains) {
for (i = 0; i < numDomains; i++)
virObjectUnref(domains[i]);
VIR_FREE(domains);
}
VIR_FREE(flags);
virObjectUnref(conn);
virObjectUnref(cfg);
return ret;
}
/**
* qemuStateCleanup:
*
* Shutdown the QEmu daemon, it will stop all active domains and networks
*/
static int
qemuStateCleanup(void)
{
if (!qemu_driver)
return -1;
virNWFilterUnRegisterCallbackDriver(&qemuCallbackDriver);
virThreadPoolFree(qemu_driver->workerPool);
virObjectUnref(qemu_driver->config);
virObjectUnref(qemu_driver->hostdevMgr);
virHashFree(qemu_driver->sharedDevices);
virObjectUnref(qemu_driver->caps);
virQEMUCapsCacheFree(qemu_driver->qemuCapsCache);
virObjectUnref(qemu_driver->domains);
virObjectUnref(qemu_driver->remotePorts);
virObjectUnref(qemu_driver->webSocketPorts);
virObjectUnref(qemu_driver->migrationPorts);
virObjectUnref(qemu_driver->migrationErrors);
virObjectUnref(qemu_driver->xmlopt);
virSysinfoDefFree(qemu_driver->hostsysinfo);
virObjectUnref(qemu_driver->closeCallbacks);
VIR_FREE(qemu_driver->qemuImgBinary);
virObjectUnref(qemu_driver->securityManager);
ebtablesContextFree(qemu_driver->ebtables);
/* Free domain callback list */
virObjectUnref(qemu_driver->domainEventState);
virLockManagerPluginUnref(qemu_driver->lockManager);
virMutexDestroy(&qemu_driver->lock);
VIR_FREE(qemu_driver);
return 0;
}
static virDrvOpenStatus qemuConnectOpen(virConnectPtr conn,
virConnectAuthPtr auth ATTRIBUTE_UNUSED,
virConfPtr conf ATTRIBUTE_UNUSED,
unsigned int flags)
{
virQEMUDriverConfigPtr cfg = NULL;
virDrvOpenStatus ret = VIR_DRV_OPEN_ERROR;
virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
if (conn->uri == NULL) {
if (qemu_driver == NULL) {
ret = VIR_DRV_OPEN_DECLINED;
goto cleanup;
}
cfg = virQEMUDriverGetConfig(qemu_driver);
if (!(conn->uri = virURIParse(cfg->uri)))
goto cleanup;
} else {
/* If URI isn't 'qemu' its definitely not for us */
if (conn->uri->scheme == NULL ||
STRNEQ(conn->uri->scheme, "qemu")) {
ret = VIR_DRV_OPEN_DECLINED;
goto cleanup;
}
/* Allow remote driver to deal with URIs with hostname server */
if (conn->uri->server != NULL) {
ret = VIR_DRV_OPEN_DECLINED;
goto cleanup;
}
if (qemu_driver == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("qemu state driver is not active"));
goto cleanup;
}
cfg = virQEMUDriverGetConfig(qemu_driver);
if (conn->uri->path == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("no QEMU URI path given, try %s"),
cfg->uri);
goto cleanup;
}
if (virQEMUDriverIsPrivileged(qemu_driver)) {
if (STRNEQ(conn->uri->path, "/system") &&
STRNEQ(conn->uri->path, "/session")) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected QEMU URI path '%s', try qemu:///system"),
conn->uri->path);
goto cleanup;
}
} else {
if (STRNEQ(conn->uri->path, "/session")) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected QEMU URI path '%s', try qemu:///session"),
conn->uri->path);
goto cleanup;
}
}
}
if (virConnectOpenEnsureACL(conn) < 0)
goto cleanup;
conn->privateData = qemu_driver;
ret = VIR_DRV_OPEN_SUCCESS;
cleanup:
virObjectUnref(cfg);
return ret;
}
static int qemuConnectClose(virConnectPtr conn)
{
virQEMUDriverPtr driver = conn->privateData;
/* Get rid of callbacks registered for this conn */
virCloseCallbacksRun(driver->closeCallbacks, conn, driver->domains, driver);
conn->privateData = NULL;
return 0;
}
/* Which features are supported by this driver? */
static int
qemuConnectSupportsFeature(virConnectPtr conn, int feature)
{
if (virConnectSupportsFeatureEnsureACL(conn) < 0)
return -1;
switch (feature) {
case VIR_DRV_FEATURE_MIGRATION_V2:
case VIR_DRV_FEATURE_MIGRATION_V3:
case VIR_DRV_FEATURE_MIGRATION_P2P:
case VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION:
case VIR_DRV_FEATURE_FD_PASSING:
case VIR_DRV_FEATURE_TYPED_PARAM_STRING:
case VIR_DRV_FEATURE_XML_MIGRATABLE:
case VIR_DRV_FEATURE_MIGRATION_OFFLINE:
case VIR_DRV_FEATURE_MIGRATION_PARAMS:
return 1;
default:
return 0;
}
}
static const char *qemuConnectGetType(virConnectPtr conn) {
if (virConnectGetTypeEnsureACL(conn) < 0)
return NULL;
return "QEMU";
}
static int qemuConnectIsSecure(virConnectPtr conn ATTRIBUTE_UNUSED)
{
/* Trivially secure, since always inside the daemon */
return 1;
}
static int qemuConnectIsEncrypted(virConnectPtr conn ATTRIBUTE_UNUSED)
{
/* Not encrypted, but remote driver takes care of that */
return 0;
}
static int qemuConnectIsAlive(virConnectPtr conn ATTRIBUTE_UNUSED)
{
return 1;
}
static char *
qemuConnectGetSysinfo(virConnectPtr conn, unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
virBuffer buf = VIR_BUFFER_INITIALIZER;
virCheckFlags(0, NULL);
if (virConnectGetSysinfoEnsureACL(conn) < 0)
return NULL;
if (!driver->hostsysinfo) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Host SMBIOS information is not available"));
return NULL;
}
if (virSysinfoFormat(&buf, driver->hostsysinfo) < 0)
return NULL;
if (virBufferCheckError(&buf) < 0)
return NULL;
return virBufferContentAndReset(&buf);
}
static int
qemuConnectGetMaxVcpus(virConnectPtr conn ATTRIBUTE_UNUSED, const char *type)
{
if (virConnectGetMaxVcpusEnsureACL(conn) < 0)
return -1;
if (!type)
return 16;
if (STRCASEEQ(type, "qemu"))
return 16;
if (STRCASEEQ(type, "kvm"))
return virHostCPUGetKVMMaxVCPUs();
if (STRCASEEQ(type, "kqemu"))
return 1;
virReportError(VIR_ERR_INVALID_ARG,
_("unknown type '%s'"), type);
return -1;
}
static char *qemuConnectGetCapabilities(virConnectPtr conn) {
virQEMUDriverPtr driver = conn->privateData;
virCapsPtr caps = NULL;
char *xml = NULL;
if (virConnectGetCapabilitiesEnsureACL(conn) < 0)
return NULL;
if (!(caps = virQEMUDriverGetCapabilities(driver, true)))
goto cleanup;
xml = virCapabilitiesFormatXML(caps);
virObjectUnref(caps);
cleanup:
return xml;
}
static int
qemuGetSchedInfo(unsigned long long *cpuWait,
pid_t pid, pid_t tid)
{
char *proc = NULL;
char *data = NULL;
char **lines = NULL;
size_t i;
int ret = -1;
double val;
*cpuWait = 0;
/* In general, we cannot assume pid_t fits in int; but /proc parsing
* is specific to Linux where int works fine. */
if (tid)
ret = virAsprintf(&proc, "/proc/%d/task/%d/sched", (int)pid, (int)tid);
else
ret = virAsprintf(&proc, "/proc/%d/sched", (int)pid);
if (ret < 0)
goto cleanup;
ret = -1;
/* The file is not guaranteed to exist (needs CONFIG_SCHED_DEBUG) */
if (access(proc, R_OK) < 0) {
ret = 0;
goto cleanup;
}
if (virFileReadAll(proc, (1<<16), &data) < 0)
goto cleanup;
lines = virStringSplit(data, "\n", 0);
if (!lines)
goto cleanup;
for (i = 0; lines[i] != NULL; i++) {
const char *line = lines[i];
/* Needs CONFIG_SCHEDSTATS. The second check
* is the old name the kernel used in past */
if (STRPREFIX(line, "se.statistics.wait_sum") ||
STRPREFIX(line, "se.wait_sum")) {
line = strchr(line, ':');
if (!line) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Missing separator in sched info '%s'"),
lines[i]);
goto cleanup;
}
line++;
while (*line == ' ')
line++;
if (virStrToDouble(line, NULL, &val) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to parse sched info value '%s'"),
line);
goto cleanup;
}
*cpuWait = (unsigned long long)(val * 1000000);
break;
}
}
ret = 0;
cleanup:
VIR_FREE(data);
VIR_FREE(proc);
virStringListFree(lines);
return ret;
}
static int
qemuGetProcessInfo(unsigned long long *cpuTime, int *lastCpu, long *vm_rss,
pid_t pid, int tid)
{
char *proc;
FILE *pidinfo;
unsigned long long usertime = 0, systime = 0;
long rss = 0;
int cpu = 0;
int ret;
/* In general, we cannot assume pid_t fits in int; but /proc parsing
* is specific to Linux where int works fine. */
if (tid)
ret = virAsprintf(&proc, "/proc/%d/task/%d/stat", (int) pid, tid);
else
ret = virAsprintf(&proc, "/proc/%d/stat", (int) pid);
if (ret < 0)
return -1;
pidinfo = fopen(proc, "r");
VIR_FREE(proc);
/* See 'man proc' for information about what all these fields are. We're
* only interested in a very few of them */
if (!pidinfo ||
fscanf(pidinfo,
/* pid -> stime */
"%*d (%*[^)]) %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %llu %llu"
/* cutime -> endcode */
"%*d %*d %*d %*d %*d %*d %*u %*u %ld %*u %*u %*u"
/* startstack -> processor */
"%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*d %d",
&usertime, &systime, &rss, &cpu) != 4) {
VIR_WARN("cannot parse process status data");
}
/* We got jiffies
* We want nanoseconds
* _SC_CLK_TCK is jiffies per second
* So calculate thus....
*/
if (cpuTime)
*cpuTime = 1000ull * 1000ull * 1000ull * (usertime + systime)
/ (unsigned long long)sysconf(_SC_CLK_TCK);
if (lastCpu)
*lastCpu = cpu;
if (vm_rss)
*vm_rss = rss * virGetSystemPageSizeKB();
VIR_DEBUG("Got status for %d/%d user=%llu sys=%llu cpu=%d rss=%ld",
(int) pid, tid, usertime, systime, cpu, rss);
VIR_FORCE_FCLOSE(pidinfo);
return 0;
}
static int
qemuDomainHelperGetVcpus(virDomainObjPtr vm,
virVcpuInfoPtr info,
unsigned long long *cpuwait,
int maxinfo,
unsigned char *cpumaps,
int maplen,
bool *cpuhalted)
{
size_t ncpuinfo = 0;
size_t i;
if (maxinfo == 0)
return 0;
if (!qemuDomainHasVcpuPids(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not supported"));
return -1;
}
if (info)
memset(info, 0, sizeof(*info) * maxinfo);
if (cpumaps)
memset(cpumaps, 0, sizeof(*cpumaps) * maxinfo);
if (cpuhalted)
memset(cpuhalted, 0, sizeof(*cpuhalted) * maxinfo);
for (i = 0; i < virDomainDefGetVcpusMax(vm->def) && ncpuinfo < maxinfo; i++) {
virDomainVcpuDefPtr vcpu = virDomainDefGetVcpu(vm->def, i);
pid_t vcpupid = qemuDomainGetVcpuPid(vm, i);
virVcpuInfoPtr vcpuinfo = info + ncpuinfo;
if (!vcpu->online)
continue;
if (info) {
vcpuinfo->number = i;
vcpuinfo->state = VIR_VCPU_RUNNING;
if (qemuGetProcessInfo(&vcpuinfo->cpuTime,
&vcpuinfo->cpu, NULL,
vm->pid, vcpupid) < 0) {
virReportSystemError(errno, "%s",
_("cannot get vCPU placement & pCPU time"));
return -1;
}
}
if (cpumaps) {
unsigned char *cpumap = VIR_GET_CPUMAP(cpumaps, maplen, ncpuinfo);
virBitmapPtr map = NULL;
if (!(map = virProcessGetAffinity(vcpupid)))
return -1;
virBitmapToDataBuf(map, cpumap, maplen);
virBitmapFree(map);
}
if (cpuwait) {
if (qemuGetSchedInfo(&(cpuwait[ncpuinfo]), vm->pid, vcpupid) < 0)
return -1;
}
if (cpuhalted)
cpuhalted[ncpuinfo] = qemuDomainGetVcpuHalted(vm, ncpuinfo);
ncpuinfo++;
}
return ncpuinfo;
}
static virDomainPtr qemuDomainLookupByID(virConnectPtr conn,
int id)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
vm = virDomainObjListFindByID(driver->domains, id);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching id %d"), id);
goto cleanup;
}
if (virDomainLookupByIDEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
cleanup:
if (vm)
virObjectUnlock(vm);
return dom;
}
static virDomainPtr qemuDomainLookupByUUID(virConnectPtr conn,
const unsigned char *uuid)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
vm = virDomainObjListFindByUUIDRef(driver->domains, uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(uuid, uuidstr);
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainLookupByUUIDEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
cleanup:
virDomainObjEndAPI(&vm);
return dom;
}
static virDomainPtr qemuDomainLookupByName(virConnectPtr conn,
const char *name)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
vm = virDomainObjListFindByName(driver->domains, name);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching name '%s'"), name);
goto cleanup;
}
if (virDomainLookupByNameEnsureACL(conn, vm->def) < 0)
goto cleanup;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
cleanup:
virDomainObjEndAPI(&vm);
return dom;
}
static int qemuDomainIsActive(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainIsActiveEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = virDomainObjIsActive(obj);
cleanup:
virDomainObjEndAPI(&obj);
return ret;
}
static int qemuDomainIsPersistent(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainIsPersistentEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = obj->persistent;
cleanup:
virDomainObjEndAPI(&obj);
return ret;
}
static int qemuDomainIsUpdated(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainIsUpdatedEnsureACL(dom->conn, obj->def) < 0)
goto cleanup;
ret = obj->updated;
cleanup:
virDomainObjEndAPI(&obj);
return ret;
}
static int qemuConnectGetVersion(virConnectPtr conn, unsigned long *version)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
unsigned int qemuVersion = 0;
virCapsPtr caps = NULL;
if (virConnectGetVersionEnsureACL(conn) < 0)
return -1;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virQEMUCapsGetDefaultVersion(caps,
driver->qemuCapsCache,
&qemuVersion) < 0)
goto cleanup;
*version = qemuVersion;
ret = 0;
cleanup:
virObjectUnref(caps);
return ret;
}
static char *qemuConnectGetHostname(virConnectPtr conn)
{
if (virConnectGetHostnameEnsureACL(conn) < 0)
return NULL;
return virGetHostname();
}
static int qemuConnectListDomains(virConnectPtr conn, int *ids, int nids)
{
virQEMUDriverPtr driver = conn->privateData;
int n;
if (virConnectListDomainsEnsureACL(conn) < 0)
return -1;
n = virDomainObjListGetActiveIDs(driver->domains, ids, nids,
virConnectListDomainsCheckACL, conn);
return n;
}
static int qemuConnectNumOfDomains(virConnectPtr conn)
{
virQEMUDriverPtr driver = conn->privateData;
int n;
if (virConnectNumOfDomainsEnsureACL(conn) < 0)
return -1;
n = virDomainObjListNumOfDomains(driver->domains, true,
virConnectNumOfDomainsCheckACL, conn);
return n;
}
static virDomainPtr qemuDomainCreateXML(virConnectPtr conn,
const char *xml,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainDefPtr def = NULL;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
virObjectEventPtr event = NULL;
virObjectEventPtr event2 = NULL;
unsigned int start_flags = VIR_QEMU_PROCESS_START_COLD;
virCapsPtr caps = NULL;
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_ABI_UPDATE;
virCheckFlags(VIR_DOMAIN_START_PAUSED |
VIR_DOMAIN_START_AUTODESTROY |
VIR_DOMAIN_START_VALIDATE, NULL);
if (flags & VIR_DOMAIN_START_VALIDATE)
parse_flags |= VIR_DOMAIN_DEF_PARSE_VALIDATE_SCHEMA;
if (flags & VIR_DOMAIN_START_PAUSED)
start_flags |= VIR_QEMU_PROCESS_START_PAUSED;
if (flags & VIR_DOMAIN_START_AUTODESTROY)
start_flags |= VIR_QEMU_PROCESS_START_AUTODESTROY;
virNWFilterReadLockFilterUpdates();
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(xml, caps, driver->xmlopt,
NULL, parse_flags)))
goto cleanup;
if (virDomainCreateXMLEnsureACL(conn, def) < 0)
goto cleanup;
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
VIR_DOMAIN_OBJ_LIST_ADD_LIVE |
VIR_DOMAIN_OBJ_LIST_ADD_CHECK_LIVE,
NULL)))
goto cleanup;
virObjectRef(vm);
def = NULL;
if (qemuProcessBeginJob(driver, vm, VIR_DOMAIN_JOB_OPERATION_START) < 0) {
qemuDomainRemoveInactive(driver, vm);
goto cleanup;
}
if (qemuProcessStart(conn, driver, vm, NULL, QEMU_ASYNC_JOB_START,
NULL, -1, NULL, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE,
start_flags) < 0) {
virDomainAuditStart(vm, "booted", false);
qemuProcessEndJob(driver, vm);
qemuDomainRemoveInactive(driver, vm);
goto cleanup;
}
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_BOOTED);
if (event && (flags & VIR_DOMAIN_START_PAUSED)) {
/* There are two classes of event-watching clients - those
* that only care about on/off (and must see a started event
* no matter what, but don't care about suspend events), and
* those that also care about running/paused. To satisfy both
* client types, we have to send two events. */
event2 = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_PAUSED);
}
virDomainAuditStart(vm, "booted", true);
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
qemuProcessEndJob(driver, vm);
cleanup:
virDomainDefFree(def);
virDomainObjEndAPI(&vm);
if (event) {
qemuDomainEventQueue(driver, event);
qemuDomainEventQueue(driver, event2);
}
virObjectUnref(caps);
virNWFilterUnlockFilterUpdates();
return dom;
}
static int qemuDomainSuspend(virDomainPtr dom)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virObjectEventPtr event = NULL;
qemuDomainObjPrivatePtr priv;
virDomainPausedReason reason;
int eventDetail;
int state;
virQEMUDriverConfigPtr cfg = NULL;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainSuspendEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_SUSPEND) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_OUT) {
reason = VIR_DOMAIN_PAUSED_MIGRATION;
eventDetail = VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED;
} else if (priv->job.asyncJob == QEMU_ASYNC_JOB_SNAPSHOT) {
reason = VIR_DOMAIN_PAUSED_SNAPSHOT;
eventDetail = -1; /* don't create lifecycle events when doing snapshot */
} else {
reason = VIR_DOMAIN_PAUSED_USER;
eventDetail = VIR_DOMAIN_EVENT_SUSPENDED_PAUSED;
}
state = virDomainObjGetState(vm, NULL);
if (state == VIR_DOMAIN_PMSUSPENDED) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is pmsuspended"));
goto endjob;
} else if (state != VIR_DOMAIN_PAUSED) {
if (qemuProcessStopCPUs(driver, vm, reason, QEMU_ASYNC_JOB_NONE) < 0)
goto endjob;
if (eventDetail >= 0) {
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
eventDetail);
}
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
qemuDomainEventQueue(driver, event);
virObjectUnref(cfg);
return ret;
}
static int qemuDomainResume(virDomainPtr dom)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virObjectEventPtr event = NULL;
int state;
int reason;
virQEMUDriverConfigPtr cfg = NULL;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainResumeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
state = virDomainObjGetState(vm, &reason);
if (state == VIR_DOMAIN_PMSUSPENDED) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is pmsuspended"));
goto endjob;
} else if (state == VIR_DOMAIN_RUNNING) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is already running"));
goto endjob;
} else if ((state == VIR_DOMAIN_CRASHED &&
reason == VIR_DOMAIN_CRASHED_PANICKED) ||
state == VIR_DOMAIN_PAUSED) {
if (qemuProcessStartCPUs(driver, vm, dom->conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_NONE) < 0) {
if (virGetLastError() == NULL)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("resume operation failed"));
goto endjob;
}
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
VIR_DOMAIN_EVENT_RESUMED_UNPAUSED);
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
qemuDomainEventQueue(driver, event);
virObjectUnref(cfg);
return ret;
}
static int qemuDomainShutdownFlags(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool useAgent = false, agentRequested, acpiRequested;
bool isReboot = false;
bool agentForced;
int agentFlag = QEMU_AGENT_SHUTDOWN_POWERDOWN;
virCheckFlags(VIR_DOMAIN_SHUTDOWN_ACPI_POWER_BTN |
VIR_DOMAIN_SHUTDOWN_GUEST_AGENT, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (vm->def->onPoweroff == VIR_DOMAIN_LIFECYCLE_RESTART ||
vm->def->onPoweroff == VIR_DOMAIN_LIFECYCLE_RESTART_RENAME) {
isReboot = true;
agentFlag = QEMU_AGENT_SHUTDOWN_REBOOT;
VIR_INFO("Domain on_poweroff setting overridden, attempting reboot");
}
priv = vm->privateData;
agentRequested = flags & VIR_DOMAIN_SHUTDOWN_GUEST_AGENT;
acpiRequested = flags & VIR_DOMAIN_SHUTDOWN_ACPI_POWER_BTN;
/* Prefer agent unless we were requested to not to. */
if (agentRequested || (!flags && priv->agent))
useAgent = true;
if (virDomainShutdownFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetState(vm, NULL) != VIR_DOMAIN_RUNNING) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
agentForced = agentRequested && !acpiRequested;
if (!qemuDomainAgentAvailable(vm, agentForced)) {
if (agentForced)
goto endjob;
useAgent = false;
}
if (useAgent) {
qemuAgentPtr agent;
qemuDomainSetFakeReboot(driver, vm, false);
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentShutdown(agent, agentFlag);
qemuDomainObjExitAgent(vm, agent);
}
/* If we are not enforced to use just an agent, try ACPI
* shutdown as well in case agent did not succeed.
*/
if (!useAgent ||
(ret < 0 && (acpiRequested || !flags))) {
/* Even if agent failed, we have to check if guest went away
* by itself while our locks were down. */
if (useAgent && !virDomainObjIsActive(vm)) {
ret = 0;
goto endjob;
}
qemuDomainSetFakeReboot(driver, vm, isReboot);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemPowerdown(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
}
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDomainShutdown(virDomainPtr dom)
{
return qemuDomainShutdownFlags(dom, 0);
}
static int
qemuDomainReboot(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool useAgent = false, agentRequested, acpiRequested;
bool isReboot = true;
bool agentForced;
int agentFlag = QEMU_AGENT_SHUTDOWN_REBOOT;
virCheckFlags(VIR_DOMAIN_REBOOT_ACPI_POWER_BTN |
VIR_DOMAIN_REBOOT_GUEST_AGENT, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (vm->def->onReboot == VIR_DOMAIN_LIFECYCLE_DESTROY ||
vm->def->onReboot == VIR_DOMAIN_LIFECYCLE_PRESERVE) {
agentFlag = QEMU_AGENT_SHUTDOWN_POWERDOWN;
isReboot = false;
VIR_INFO("Domain on_reboot setting overridden, shutting down");
}
priv = vm->privateData;
agentRequested = flags & VIR_DOMAIN_REBOOT_GUEST_AGENT;
acpiRequested = flags & VIR_DOMAIN_REBOOT_ACPI_POWER_BTN;
/* Prefer agent unless we were requested to not to. */
if (agentRequested || (!flags && priv->agent))
useAgent = true;
if (virDomainRebootEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
agentForced = agentRequested && !acpiRequested;
if (!qemuDomainAgentAvailable(vm, agentForced)) {
if (agentForced)
goto endjob;
useAgent = false;
}
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (useAgent) {
qemuAgentPtr agent;
qemuDomainSetFakeReboot(driver, vm, false);
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentShutdown(agent, agentFlag);
qemuDomainObjExitAgent(vm, agent);
}
/* If we are not enforced to use just an agent, try ACPI
* shutdown as well in case agent did not succeed.
*/
if ((!useAgent) ||
(ret < 0 && (acpiRequested || !flags))) {
#if WITH_YAJL
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_MONITOR_JSON)) {
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_NO_SHUTDOWN)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("ACPI reboot is not supported with this QEMU binary"));
goto endjob;
}
} else {
#endif
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("ACPI reboot is not supported without the JSON monitor"));
goto endjob;
#if WITH_YAJL
}
#endif
qemuDomainSetFakeReboot(driver, vm, isReboot);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemPowerdown(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
}
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainReset(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virDomainState state;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainResetEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemReset(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
priv->fakeReboot = false;
state = virDomainObjGetState(vm, NULL);
if (state == VIR_DOMAIN_CRASHED)
virDomainObjSetState(vm, VIR_DOMAIN_PAUSED, VIR_DOMAIN_PAUSED_CRASHED);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* Count how many snapshots in a set are external snapshots or checkpoints. */
static int
qemuDomainSnapshotCountExternal(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *data)
{
virDomainSnapshotObjPtr snap = payload;
int *count = data;
if (virDomainSnapshotIsExternal(snap))
(*count)++;
return 0;
}
static int
qemuDomainDestroyFlags(virDomainPtr dom,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virObjectEventPtr event = NULL;
qemuDomainObjPrivatePtr priv;
unsigned int stopFlags = 0;
virCheckFlags(VIR_DOMAIN_DESTROY_GRACEFUL, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
if (virDomainDestroyFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuProcessBeginStopJob(driver, vm, QEMU_JOB_DESTROY,
!(flags & VIR_DOMAIN_DESTROY_GRACEFUL)) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuDomainSetFakeReboot(driver, vm, false);
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN)
stopFlags |= VIR_QEMU_PROCESS_STOP_MIGRATED;
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_DESTROYED,
QEMU_ASYNC_JOB_NONE, stopFlags);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_DESTROYED);
virDomainAuditStop(vm, "destroyed");
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
if (ret == 0)
qemuDomainRemoveInactive(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
qemuDomainEventQueue(driver, event);
return ret;
}
static int
qemuDomainDestroy(virDomainPtr dom)
{
return qemuDomainDestroyFlags(dom, 0);
}
static char *qemuDomainGetOSType(virDomainPtr dom) {
virDomainObjPtr vm;
char *type = NULL;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetOSTypeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ignore_value(VIR_STRDUP(type, virDomainOSTypeToString(vm->def->os.type)));
cleanup:
virDomainObjEndAPI(&vm);
return type;
}
/* Returns max memory in kb, 0 if error */
static unsigned long long
qemuDomainGetMaxMemory(virDomainPtr dom)
{
virDomainObjPtr vm;
unsigned long long ret = 0;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetMaxMemoryEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = virDomainDefGetMemoryTotal(vm->def);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDomainSetMemoryFlags(virDomainPtr dom, unsigned long newmem,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
int ret = -1, r;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_MEM_MAXIMUM, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetMemoryFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (flags & VIR_DOMAIN_MEM_MAXIMUM) {
/* resize the maximum memory */
if (def) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot resize the maximum memory on an "
"active domain"));
goto endjob;
}
if (persistentDef) {
/* resizing memory with NUMA nodes specified doesn't work as there
* is no way to change the individual node sizes with this API */
if (virDomainNumaGetNodeCount(persistentDef->numa) > 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("initial memory size of a domain with NUMA "
"nodes cannot be modified with this API"));
goto endjob;
}
if (persistentDef->mem.max_memory &&
persistentDef->mem.max_memory < newmem) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot set initial memory size greater than "
"the maximum memory size"));
goto endjob;
}
virDomainDefSetMemoryTotal(persistentDef, newmem);
if (persistentDef->mem.cur_balloon > newmem)
persistentDef->mem.cur_balloon = newmem;
ret = virDomainSaveConfig(cfg->configDir, driver->caps,
persistentDef);
goto endjob;
}
} else {
/* resize the current memory */
unsigned long oldmax = 0;
if (def)
oldmax = virDomainDefGetMemoryTotal(def);
if (persistentDef) {
if (!oldmax || oldmax > virDomainDefGetMemoryTotal(persistentDef))
oldmax = virDomainDefGetMemoryTotal(persistentDef);
}
if (newmem > oldmax) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("cannot set memory higher than max memory"));
goto endjob;
}
if (def) {
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
r = qemuMonitorSetBalloon(priv->mon, newmem);
if (qemuDomainObjExitMonitor(driver, vm) < 0 || r < 0)
goto endjob;
/* Lack of balloon support is a fatal error */
if (r == 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Unable to change memory of active domain without "
"the balloon device and guest OS balloon driver"));
goto endjob;
}
}
if (persistentDef) {
persistentDef->mem.cur_balloon = newmem;
ret = virDomainSaveConfig(cfg->configDir, driver->caps,
persistentDef);
goto endjob;
}
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int qemuDomainSetMemory(virDomainPtr dom, unsigned long newmem)
{
return qemuDomainSetMemoryFlags(dom, newmem, VIR_DOMAIN_AFFECT_LIVE);
}
static int qemuDomainSetMaxMemory(virDomainPtr dom, unsigned long memory)
{
return qemuDomainSetMemoryFlags(dom, memory, VIR_DOMAIN_MEM_MAXIMUM);
}
static int qemuDomainSetMemoryStatsPeriod(virDomainPtr dom, int period,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
int ret = -1, r;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetMemoryStatsPeriodEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
/* Set the balloon driver collection interval */
priv = vm->privateData;
if (def) {
if (!def->memballoon ||
def->memballoon->model != VIR_DOMAIN_MEMBALLOON_MODEL_VIRTIO) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Memory balloon model must be virtio to set the"
" collection period"));
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
r = qemuMonitorSetMemoryStatsPeriod(priv->mon, def->memballoon, period);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
if (r < 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("unable to set balloon driver collection period"));
goto endjob;
}
def->memballoon->period = period;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
}
if (persistentDef) {
if (!persistentDef->memballoon ||
persistentDef->memballoon->model != VIR_DOMAIN_MEMBALLOON_MODEL_VIRTIO) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Memory balloon model must be virtio to set the"
" collection period"));
goto endjob;
}
persistentDef->memballoon->period = period;
ret = virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef);
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int qemuDomainInjectNMI(virDomainPtr domain, unsigned int flags)
{
virQEMUDriverPtr driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
if (virDomainInjectNMIEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorInjectNMI(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDomainSendKey(virDomainPtr domain,
unsigned int codeset,
unsigned int holdtime,
unsigned int *keycodes,
int nkeycodes,
unsigned int flags)
{
virQEMUDriverPtr driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(0, -1);
/* translate the keycode to RFB for qemu driver */
if (codeset != VIR_KEYCODE_SET_RFB) {
size_t i;
int keycode;
for (i = 0; i < nkeycodes; i++) {
keycode = virKeycodeValueTranslate(codeset, VIR_KEYCODE_SET_RFB,
keycodes[i]);
if (keycode < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot translate keycode %u of %s codeset to rfb keycode"),
keycodes[i],
virKeycodeSetTypeToString(codeset));
return -1;
}
keycodes[i] = keycode;
}
}
if (!(vm = qemuDomObjFromDomain(domain)))
goto cleanup;
priv = vm->privateData;
if (virDomainSendKeyEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSendKey(priv->mon, holdtime, keycodes, nkeycodes);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetInfo(virDomainPtr dom,
virDomainInfoPtr info)
{
unsigned long long maxmem;
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainUpdateCurrentMemorySize(driver, vm) < 0)
goto cleanup;
memset(info, 0, sizeof(*info));
info->state = virDomainObjGetState(vm, NULL);
maxmem = virDomainDefGetMemoryTotal(vm->def);
if (VIR_ASSIGN_IS_OVERFLOW(info->maxMem, maxmem)) {
virReportError(VIR_ERR_OVERFLOW, "%s",
_("Initial memory size too large"));
goto cleanup;
}
if (VIR_ASSIGN_IS_OVERFLOW(info->memory, vm->def->mem.cur_balloon)) {
virReportError(VIR_ERR_OVERFLOW, "%s",
_("Current memory size too large"));
goto cleanup;
}
if (virDomainObjIsActive(vm)) {
if (qemuGetProcessInfo(&(info->cpuTime), NULL, NULL, vm->pid, 0) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("cannot read cputime for domain"));
goto cleanup;
}
}
if (VIR_ASSIGN_IS_OVERFLOW(info->nrVirtCpu, virDomainDefGetVcpus(vm->def))) {
virReportError(VIR_ERR_OVERFLOW, "%s", _("cpu count too large"));
goto cleanup;
}
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetState(virDomainPtr dom,
int *state,
int *reason,
unsigned int flags)
{
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetStateEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
*state = virDomainObjGetState(vm, reason);
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetControlInfo(virDomainPtr dom,
virDomainControlInfoPtr info,
unsigned int flags)
{
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetControlInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto cleanup;
}
priv = vm->privateData;
memset(info, 0, sizeof(*info));
if (priv->monError) {
info->state = VIR_DOMAIN_CONTROL_ERROR;
info->details = VIR_DOMAIN_CONTROL_ERROR_REASON_MONITOR;
} else if (priv->job.active) {
if (virTimeMillisNow(&info->stateTime) < 0)
goto cleanup;
if (priv->job.current) {
info->state = VIR_DOMAIN_CONTROL_JOB;
info->stateTime -= priv->job.current->started;
} else {
if (priv->monStart > 0) {
info->state = VIR_DOMAIN_CONTROL_OCCUPIED;
info->stateTime -= priv->monStart;
} else {
/* At this point the domain has an active job, but monitor was
* not entered and the domain object lock is not held thus we
* are stuck in the job forever due to a programming error.
*/
info->state = VIR_DOMAIN_CONTROL_ERROR;
info->details = VIR_DOMAIN_CONTROL_ERROR_REASON_INTERNAL;
info->stateTime = 0;
}
}
} else {
info->state = VIR_DOMAIN_CONTROL_OK;
}
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* It would be nice to replace 'Qemud' with 'Qemu' but
* this magic string is ABI, so it can't be changed
*/
#define QEMU_SAVE_MAGIC "LibvirtQemudSave"
#define QEMU_SAVE_PARTIAL "LibvirtQemudPart"
#define QEMU_SAVE_VERSION 2
verify(sizeof(QEMU_SAVE_MAGIC) == sizeof(QEMU_SAVE_PARTIAL));
typedef enum {
QEMU_SAVE_FORMAT_RAW = 0,
QEMU_SAVE_FORMAT_GZIP = 1,
QEMU_SAVE_FORMAT_BZIP2 = 2,
/*
* Deprecated by xz and never used as part of a release
* QEMU_SAVE_FORMAT_LZMA
*/
QEMU_SAVE_FORMAT_XZ = 3,
QEMU_SAVE_FORMAT_LZOP = 4,
/* Note: add new members only at the end.
These values are used in the on-disk format.
Do not change or re-use numbers. */
QEMU_SAVE_FORMAT_LAST
} virQEMUSaveFormat;
VIR_ENUM_DECL(qemuSaveCompression)
VIR_ENUM_IMPL(qemuSaveCompression, QEMU_SAVE_FORMAT_LAST,
"raw",
"gzip",
"bzip2",
"xz",
"lzop")
VIR_ENUM_DECL(qemuDumpFormat)
VIR_ENUM_IMPL(qemuDumpFormat, VIR_DOMAIN_CORE_DUMP_FORMAT_LAST,
"elf",
"kdump-zlib",
"kdump-lzo",
"kdump-snappy")
typedef struct _virQEMUSaveHeader virQEMUSaveHeader;
typedef virQEMUSaveHeader *virQEMUSaveHeaderPtr;
struct _virQEMUSaveHeader {
char magic[sizeof(QEMU_SAVE_MAGIC)-1];
uint32_t version;
uint32_t data_len;
uint32_t was_running;
uint32_t compressed;
uint32_t cookieOffset;
uint32_t unused[14];
};
typedef struct _virQEMUSaveData virQEMUSaveData;
typedef virQEMUSaveData *virQEMUSaveDataPtr;
struct _virQEMUSaveData {
virQEMUSaveHeader header;
char *xml;
char *cookie;
};
static inline void
bswap_header(virQEMUSaveHeaderPtr hdr)
{
hdr->version = bswap_32(hdr->version);
hdr->data_len = bswap_32(hdr->data_len);
hdr->was_running = bswap_32(hdr->was_running);
hdr->compressed = bswap_32(hdr->compressed);
hdr->cookieOffset = bswap_32(hdr->cookieOffset);
}
static void
virQEMUSaveDataFree(virQEMUSaveDataPtr data)
{
if (!data)
return;
VIR_FREE(data->xml);
VIR_FREE(data->cookie);
VIR_FREE(data);
}
/**
* This function steals @domXML on success.
*/
static virQEMUSaveDataPtr
virQEMUSaveDataNew(char *domXML,
qemuDomainSaveCookiePtr cookieObj,
bool running,
int compressed,
virDomainXMLOptionPtr xmlopt)
{
virQEMUSaveDataPtr data = NULL;
virQEMUSaveHeaderPtr header;
if (VIR_ALLOC(data) < 0)
return NULL;
VIR_STEAL_PTR(data->xml, domXML);
if (cookieObj &&
!(data->cookie = virSaveCookieFormat((virObjectPtr) cookieObj,
virDomainXMLOptionGetSaveCookie(xmlopt))))
goto error;
header = &data->header;
memcpy(header->magic, QEMU_SAVE_PARTIAL, sizeof(header->magic));
header->version = QEMU_SAVE_VERSION;
header->was_running = running ? 1 : 0;
header->compressed = compressed;
return data;
error:
virQEMUSaveDataFree(data);
return NULL;
}
/* virQEMUSaveDataWrite:
*
* Writes libvirt's header (including domain XML) into a saved image of a
* running domain. If @header has data_len filled in (because it was previously
* read from the file), the function will make sure the new data will fit
* within data_len.
*
* Returns -1 on failure, or 0 on success.
*/
static int
virQEMUSaveDataWrite(virQEMUSaveDataPtr data,
int fd,
const char *path)
{
virQEMUSaveHeaderPtr header = &data->header;
size_t len;
size_t xml_len;
size_t cookie_len = 0;
int ret = -1;
size_t zerosLen = 0;
char *zeros = NULL;
xml_len = strlen(data->xml) + 1;
if (data->cookie)
cookie_len = strlen(data->cookie) + 1;
len = xml_len + cookie_len;
if (header->data_len > 0) {
if (len > header->data_len) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("new xml too large to fit in file"));
goto cleanup;
}
zerosLen = header->data_len - len;
if (VIR_ALLOC_N(zeros, zerosLen) < 0)
goto cleanup;
} else {
header->data_len = len;
}
if (data->cookie)
header->cookieOffset = xml_len;
if (safewrite(fd, header, sizeof(*header)) != sizeof(*header)) {
virReportSystemError(errno,
_("failed to write header to domain save file '%s'"),
path);
goto cleanup;
}
if (safewrite(fd, data->xml, xml_len) != xml_len) {
virReportSystemError(errno,
_("failed to write domain xml to '%s'"),
path);
goto cleanup;
}
if (data->cookie &&
safewrite(fd, data->cookie, cookie_len) != cookie_len) {
virReportSystemError(errno,
_("failed to write cookie to '%s'"),
path);
goto cleanup;
}
if (safewrite(fd, zeros, zerosLen) != zerosLen) {
virReportSystemError(errno,
_("failed to write padding to '%s'"),
path);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(zeros);
return ret;
}
static int
virQEMUSaveDataFinish(virQEMUSaveDataPtr data,
int *fd,
const char *path)
{
virQEMUSaveHeaderPtr header = &data->header;
memcpy(header->magic, QEMU_SAVE_MAGIC, sizeof(header->magic));
if (safewrite(*fd, header, sizeof(*header)) != sizeof(*header) ||
VIR_CLOSE(*fd) < 0) {
virReportSystemError(errno,
_("failed to write header to domain save file '%s'"),
path);
return -1;
}
return 0;
}
static virCommandPtr
qemuCompressGetCommand(virQEMUSaveFormat compression)
{
virCommandPtr ret = NULL;
const char *prog = qemuSaveCompressionTypeToString(compression);
if (!prog) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("Invalid compressed save format %d"),
compression);
return NULL;
}
ret = virCommandNew(prog);
virCommandAddArg(ret, "-dc");
switch (compression) {
case QEMU_SAVE_FORMAT_LZOP:
virCommandAddArg(ret, "--ignore-warn");
break;
default:
break;
}
return ret;
}
/**
* qemuOpenFile:
* @driver: driver object
* @vm: domain object
* @path: path to file to open
* @oflags: flags for opening/creation of the file
* @needUnlink: set to true if file was created by this function
* @bypassSecurityDriver: optional pointer to a boolean that will be set to true
* if security driver operations are pointless (due to
* NFS mount)
*
* Internal function to properly create or open existing files, with
* ownership affected by qemu driver setup and domain DAC label.
*
* Returns the file descriptor on success and negative errno on failure.
*
* This function should not be used on storage sources. Use
* qemuDomainStorageFileInit and storage driver APIs if possible.
**/
static int
qemuOpenFile(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *path,
int oflags,
bool *needUnlink,
bool *bypassSecurityDriver)
{
int ret = -1;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
uid_t user = cfg->user;
gid_t group = cfg->group;
bool dynamicOwnership = cfg->dynamicOwnership;
virSecurityLabelDefPtr seclabel;
virObjectUnref(cfg);
/* TODO: Take imagelabel into account? */
if (vm &&
(seclabel = virDomainDefGetSecurityLabelDef(vm->def, "dac")) != NULL &&
seclabel->label != NULL &&
(virParseOwnershipIds(seclabel->label, &user, &group) < 0))
goto cleanup;
ret = qemuOpenFileAs(user, group, dynamicOwnership,
path, oflags, needUnlink, bypassSecurityDriver);
cleanup:
return ret;
}
static int
qemuOpenFileAs(uid_t fallback_uid, gid_t fallback_gid,
bool dynamicOwnership,
const char *path, int oflags,
bool *needUnlink, bool *bypassSecurityDriver)
{
struct stat sb;
bool is_reg = true;
bool need_unlink = false;
bool bypass_security = false;
unsigned int vfoflags = 0;
int fd = -1;
int path_shared = virFileIsSharedFS(path);
uid_t uid = geteuid();
gid_t gid = getegid();
/* path might be a pre-existing block dev, in which case
* we need to skip the create step, and also avoid unlink
* in the failure case */
if (oflags & O_CREAT) {
need_unlink = true;
/* Don't force chown on network-shared FS
* as it is likely to fail. */
if (path_shared <= 0 || dynamicOwnership)
vfoflags |= VIR_FILE_OPEN_FORCE_OWNER;
if (stat(path, &sb) == 0) {
/* It already exists, we don't want to delete it on error */
need_unlink = false;
is_reg = !!S_ISREG(sb.st_mode);
/* If the path is regular file which exists
* already and dynamic_ownership is off, we don't
* want to change its ownership, just open it as-is */
if (is_reg && !dynamicOwnership) {
uid = sb.st_uid;
gid = sb.st_gid;
}
}
}
/* First try creating the file as root */
if (!is_reg) {
if ((fd = open(path, oflags & ~O_CREAT)) < 0) {
fd = -errno;
goto error;
}
} else {
if ((fd = virFileOpenAs(path, oflags, S_IRUSR | S_IWUSR, uid, gid,
vfoflags | VIR_FILE_OPEN_NOFORK)) < 0) {
/* If we failed as root, and the error was permission-denied
(EACCES or EPERM), assume it's on a network-connected share
where root access is restricted (eg, root-squashed NFS). If the
qemu user is non-root, just set a flag to
bypass security driver shenanigans, and retry the operation
after doing setuid to qemu user */
if ((fd != -EACCES && fd != -EPERM) || fallback_uid == geteuid())
goto error;
/* On Linux we can also verify the FS-type of the directory. */
switch (path_shared) {
case 1:
/* it was on a network share, so we'll continue
* as outlined above
*/
break;
case -1:
virReportSystemError(-fd, oflags & O_CREAT
? _("Failed to create file "
"'%s': couldn't determine fs type")
: _("Failed to open file "
"'%s': couldn't determine fs type"),
path);
goto cleanup;
case 0:
default:
/* local file - log the error returned by virFileOpenAs */
goto error;
}
/* If we created the file above, then we need to remove it;
* otherwise, the next attempt to create will fail. If the
* file had already existed before we got here, then we also
* don't want to delete it and allow the following to succeed
* or fail based on existing protections
*/
if (need_unlink)
unlink(path);
/* Retry creating the file as qemu user */
/* Since we're passing different modes... */
vfoflags |= VIR_FILE_OPEN_FORCE_MODE;
if ((fd = virFileOpenAs(path, oflags,
S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP,
fallback_uid, fallback_gid,
vfoflags | VIR_FILE_OPEN_FORK)) < 0) {
virReportSystemError(-fd, oflags & O_CREAT
? _("Error from child process creating '%s'")
: _("Error from child process opening '%s'"),
path);
goto cleanup;
}
/* Since we had to setuid to create the file, and the fstype
is NFS, we assume it's a root-squashing NFS share, and that
the security driver stuff would have failed anyway */
bypass_security = true;
}
}
cleanup:
if (needUnlink)
*needUnlink = need_unlink;
if (bypassSecurityDriver)
*bypassSecurityDriver = bypass_security;
return fd;
error:
virReportSystemError(-fd, oflags & O_CREAT
? _("Failed to create file '%s'")
: _("Failed to open file '%s'"),
path);
goto cleanup;
}
/* Helper function to execute a migration to file with a correct save header
* the caller needs to make sure that the processors are stopped and do all other
* actions besides saving memory */
static int
qemuDomainSaveMemory(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *path,
virQEMUSaveDataPtr data,
const char *compressedpath,
unsigned int flags,
qemuDomainAsyncJob asyncJob)
{
bool bypassSecurityDriver = false;
bool needUnlink = false;
int ret = -1;
int fd = -1;
int directFlag = 0;
virFileWrapperFdPtr wrapperFd = NULL;
unsigned int wrapperFlags = VIR_FILE_WRAPPER_NON_BLOCKING;
/* Obtain the file handle. */
if ((flags & VIR_DOMAIN_SAVE_BYPASS_CACHE)) {
wrapperFlags |= VIR_FILE_WRAPPER_BYPASS_CACHE;
directFlag = virFileDirectFdFlag();
if (directFlag < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("bypass cache unsupported by this system"));
goto cleanup;
}
}
fd = qemuOpenFile(driver, vm, path,
O_WRONLY | O_TRUNC | O_CREAT | directFlag,
&needUnlink, &bypassSecurityDriver);
if (fd < 0)
goto cleanup;
if (qemuSecuritySetImageFDLabel(driver->securityManager, vm->def, fd) < 0)
goto cleanup;
if (!(wrapperFd = virFileWrapperFdNew(&fd, path, wrapperFlags)))
goto cleanup;
if (virQEMUSaveDataWrite(data, fd, path) < 0)
goto cleanup;
/* Perform the migration */
if (qemuMigrationToFile(driver, vm, fd, compressedpath, asyncJob) < 0)
goto cleanup;
/* Touch up file header to mark image complete. */
/* Reopen the file to touch up the header, since we aren't set
* up to seek backwards on wrapperFd. The reopened fd will
* trigger a single page of file system cache pollution, but
* that's acceptable. */
if (VIR_CLOSE(fd) < 0) {
virReportSystemError(errno, _("unable to close %s"), path);
goto cleanup;
}
if (virFileWrapperFdClose(wrapperFd) < 0)
goto cleanup;
if ((fd = qemuOpenFile(driver, vm, path, O_WRONLY, NULL, NULL)) < 0 ||
virQEMUSaveDataFinish(data, &fd, path) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
virFileWrapperFdFree(wrapperFd);
if (ret < 0 && needUnlink)
unlink(path);
return ret;
}
/* The vm must be active + locked. Vm will be unlocked and
* potentially free'd after this returns (eg transient VMs are freed
* shutdown). So 'vm' must not be referenced by the caller after
* this returns (whether returning success or failure).
*/
static int
qemuDomainSaveInternal(virQEMUDriverPtr driver, virDomainPtr dom,
virDomainObjPtr vm, const char *path,
int compressed, const char *compressedpath,
const char *xmlin, unsigned int flags)
{
char *xml = NULL;
bool was_running = false;
int ret = -1;
virObjectEventPtr event = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
virCapsPtr caps;
virQEMUSaveDataPtr data = NULL;
qemuDomainSaveCookiePtr cookie = NULL;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!qemuMigrationIsAllowed(driver, vm, false, 0))
goto cleanup;
if (qemuDomainObjBeginAsyncJob(driver, vm, QEMU_ASYNC_JOB_SAVE,
VIR_DOMAIN_JOB_OPERATION_SAVE) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
priv->job.current->type = VIR_DOMAIN_JOB_UNBOUNDED;
/* Pause */
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
was_running = true;
if (qemuProcessStopCPUs(driver, vm, VIR_DOMAIN_PAUSED_SAVE,
QEMU_ASYNC_JOB_SAVE) < 0)
goto endjob;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
}
/* libvirt-domain.c already guaranteed these two flags are exclusive. */
if (flags & VIR_DOMAIN_SAVE_RUNNING)
was_running = true;
else if (flags & VIR_DOMAIN_SAVE_PAUSED)
was_running = false;
/* Get XML for the domain. Restore needs only the inactive xml,
* including secure. We should get the same result whether xmlin
* is NULL or whether it was the live xml of the domain moments
* before. */
if (xmlin) {
virDomainDefPtr def = NULL;
if (!(def = virDomainDefParseString(xmlin, caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE))) {
goto endjob;
}
if (!qemuDomainCheckABIStability(driver, vm, def)) {
virDomainDefFree(def);
goto endjob;
}
xml = qemuDomainDefFormatLive(driver, def, NULL, true, true);
} else {
xml = qemuDomainDefFormatLive(driver, vm->def, priv->origCPU, true, true);
}
if (!xml) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to get domain xml"));
goto endjob;
}
if (!(cookie = qemuDomainSaveCookieNew(vm)))
goto endjob;
if (!(data = virQEMUSaveDataNew(xml, cookie, was_running, compressed,
driver->xmlopt)))
goto endjob;
xml = NULL;
ret = qemuDomainSaveMemory(driver, vm, path, data, compressedpath,
flags, QEMU_ASYNC_JOB_SAVE);
if (ret < 0)
goto endjob;
/* Shut it down */
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_SAVED,
QEMU_ASYNC_JOB_SAVE, 0);
virDomainAuditStop(vm, "saved");
event = virDomainEventLifecycleNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_SAVED);
endjob:
if (ret < 0) {
if (was_running && virDomainObjIsActive(vm)) {
virErrorPtr save_err = virSaveLastError();
if (qemuProcessStartCPUs(driver, vm, dom->conn,
VIR_DOMAIN_RUNNING_SAVE_CANCELED,
QEMU_ASYNC_JOB_SAVE) < 0) {
VIR_WARN("Unable to resume guest CPUs after save failure");
qemuDomainEventQueue(driver,
virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR));
}
virSetError(save_err);
virFreeError(save_err);
}
}
qemuDomainObjEndAsyncJob(driver, vm);
if (ret == 0)
qemuDomainRemoveInactive(driver, vm);
cleanup:
virObjectUnref(cookie);
VIR_FREE(xml);
virQEMUSaveDataFree(data);
qemuDomainEventQueue(driver, event);
virObjectUnref(caps);
return ret;
}
/* qemuGetCompressionProgram:
* @imageFormat: String representation from qemu.conf for the compression
* image format being used (dump, save, or snapshot).
* @compresspath: Pointer to a character string to store the fully qualified
* path from virFindFileInPath.
* @styleFormat: String representing the style of format (dump, save, snapshot)
* @use_raw_on_fail: Boolean indicating how to handle the error path. For
* callers that are OK with invalid data or inability to
* find the compression program, just return a raw format
* and let the path remain as NULL.
*
* Returns:
* virQEMUSaveFormat - Integer representation of the compression
* program to be used for particular style
* (e.g. dump, save, or snapshot).
* QEMU_SAVE_FORMAT_RAW - If there is no qemu.conf imageFormat value or
* no there was an error, then just return RAW
* indicating none.
*/
static int ATTRIBUTE_NONNULL(2)
qemuGetCompressionProgram(const char *imageFormat,
char **compresspath,
const char *styleFormat,
bool use_raw_on_fail)
{
int ret;
*compresspath = NULL;
if (!imageFormat)
return QEMU_SAVE_FORMAT_RAW;
if ((ret = qemuSaveCompressionTypeFromString(imageFormat)) < 0)
goto error;
if (ret == QEMU_SAVE_FORMAT_RAW)
return QEMU_SAVE_FORMAT_RAW;
if (!(*compresspath = virFindFileInPath(imageFormat)))
goto error;
return ret;
error:
if (ret < 0) {
if (use_raw_on_fail)
VIR_WARN("Invalid %s image format specified in "
"configuration file, using raw",
styleFormat);
else
virReportError(VIR_ERR_OPERATION_FAILED,
_("Invalid %s image format specified "
"in configuration file"),
styleFormat);
} else {
if (use_raw_on_fail)
VIR_WARN("Compression program for %s image format in "
"configuration file isn't available, using raw",
styleFormat);
else
virReportError(VIR_ERR_OPERATION_FAILED,
_("Compression program for %s image format "
"in configuration file isn't available"),
styleFormat);
}
/* Use "raw" as the format if the specified format is not valid,
* or the compress program is not available. */
if (use_raw_on_fail)
return QEMU_SAVE_FORMAT_RAW;
return -1;
}
static int
qemuDomainSaveFlags(virDomainPtr dom, const char *path, const char *dxml,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int compressed;
char *compressedpath = NULL;
int ret = -1;
virDomainObjPtr vm = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
cfg = virQEMUDriverGetConfig(driver);
if ((compressed = qemuGetCompressionProgram(cfg->saveImageFormat,
&compressedpath,
"save", false)) < 0)
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainSaveFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
ret = qemuDomainSaveInternal(driver, dom, vm, path, compressed,
compressedpath, dxml, flags);
cleanup:
virDomainObjEndAPI(&vm);
VIR_FREE(compressedpath);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainSave(virDomainPtr dom, const char *path)
{
return qemuDomainSaveFlags(dom, path, NULL, 0);
}
static char *
qemuDomainManagedSavePath(virQEMUDriverPtr driver, virDomainObjPtr vm)
{
char *ret;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
if (virAsprintf(&ret, "%s/%s.save", cfg->saveDir, vm->def->name) < 0) {
virObjectUnref(cfg);
return NULL;
}
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainManagedSave(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virQEMUDriverConfigPtr cfg = NULL;
int compressed;
char *compressedpath = NULL;
virDomainObjPtr vm;
char *name = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainManagedSaveEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (!vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot do managed save for transient domain"));
goto cleanup;
}
cfg = virQEMUDriverGetConfig(driver);
if ((compressed = qemuGetCompressionProgram(cfg->saveImageFormat,
&compressedpath,
"save", false)) < 0)
goto cleanup;
if (!(name = qemuDomainManagedSavePath(driver, vm)))
goto cleanup;
VIR_INFO("Saving state of domain '%s' to '%s'", vm->def->name, name);
ret = qemuDomainSaveInternal(driver, dom, vm, name, compressed,
compressedpath, NULL, flags);
if (ret == 0)
vm->hasManagedSave = true;
cleanup:
virDomainObjEndAPI(&vm);
VIR_FREE(name);
VIR_FREE(compressedpath);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainManagedSaveLoad(virDomainObjPtr vm,
void *opaque)
{
virQEMUDriverPtr driver = opaque;
char *name;
int ret = -1;
virObjectLock(vm);
if (!(name = qemuDomainManagedSavePath(driver, vm)))
goto cleanup;
vm->hasManagedSave = virFileExists(name);
ret = 0;
cleanup:
virObjectUnlock(vm);
VIR_FREE(name);
return ret;
}
static int
qemuDomainHasManagedSaveImage(virDomainPtr dom, unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainHasManagedSaveImageEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = vm->hasManagedSave;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainManagedSaveRemove(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
char *name = NULL;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainManagedSaveRemoveEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!(name = qemuDomainManagedSavePath(driver, vm)))
goto cleanup;
if (unlink(name) < 0) {
virReportSystemError(errno,
_("Failed to remove managed save file '%s'"),
name);
goto cleanup;
}
vm->hasManagedSave = false;
ret = 0;
cleanup:
VIR_FREE(name);
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDumpToFd(virQEMUDriverPtr driver, virDomainObjPtr vm,
int fd, qemuDomainAsyncJob asyncJob,
const char *dumpformat)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
int ret = -1;
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DUMP_GUEST_MEMORY)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("dump-guest-memory is not supported"));
return -1;
}
if (qemuSecuritySetImageFDLabel(driver->securityManager, vm->def, fd) < 0)
return -1;
VIR_FREE(priv->job.current);
priv->job.dump_memory_only = true;
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
return -1;
if (dumpformat) {
ret = qemuMonitorGetDumpGuestMemoryCapability(priv->mon, dumpformat);
if (ret <= 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("unsupported dumpformat '%s' "
"for this QEMU binary"),
dumpformat);
ret = -1;
goto cleanup;
}
}
ret = qemuMonitorDumpToFd(priv->mon, fd, dumpformat);
cleanup:
ignore_value(qemuDomainObjExitMonitor(driver, vm));
return ret;
}
static int
doCoreDump(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *path,
unsigned int dump_flags,
unsigned int dumpformat)
{
int fd = -1;
int ret = -1;
virFileWrapperFdPtr wrapperFd = NULL;
int directFlag = 0;
unsigned int flags = VIR_FILE_WRAPPER_NON_BLOCKING;
const char *memory_dump_format = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
char *compressedpath = NULL;
/* We reuse "save" flag for "dump" here. Then, we can support the same
* format in "save" and "dump". This path doesn't need the compression
* program to exist and can ignore the return value - it only cares to
* get the compressedpath */
ignore_value(qemuGetCompressionProgram(cfg->dumpImageFormat,
&compressedpath,
"dump", true));
/* Create an empty file with appropriate ownership. */
if (dump_flags & VIR_DUMP_BYPASS_CACHE) {
flags |= VIR_FILE_WRAPPER_BYPASS_CACHE;
directFlag = virFileDirectFdFlag();
if (directFlag < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("bypass cache unsupported by this system"));
goto cleanup;
}
}
/* Core dumps usually imply last-ditch analysis efforts are
* desired, so we intentionally do not unlink even if a file was
* created. */
if ((fd = qemuOpenFile(driver, vm, path,
O_CREAT | O_TRUNC | O_WRONLY | directFlag,
NULL, NULL)) < 0)
goto cleanup;
if (!(wrapperFd = virFileWrapperFdNew(&fd, path, flags)))
goto cleanup;
if (dump_flags & VIR_DUMP_MEMORY_ONLY) {
if (!(memory_dump_format = qemuDumpFormatTypeToString(dumpformat))) {
virReportError(VIR_ERR_INVALID_ARG,
_("unknown dumpformat '%d'"), dumpformat);
goto cleanup;
}
/* qemu dumps in "elf" without dumpformat set */
if (STREQ(memory_dump_format, "elf"))
memory_dump_format = NULL;
ret = qemuDumpToFd(driver, vm, fd, QEMU_ASYNC_JOB_DUMP,
memory_dump_format);
} else {
if (dumpformat != VIR_DOMAIN_CORE_DUMP_FORMAT_RAW) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("kdump-compressed format is only supported with "
"memory-only dump"));
goto cleanup;
}
if (!qemuMigrationIsAllowed(driver, vm, false, 0))
goto cleanup;
ret = qemuMigrationToFile(driver, vm, fd, compressedpath,
QEMU_ASYNC_JOB_DUMP);
}
if (ret < 0)
goto cleanup;
if (VIR_CLOSE(fd) < 0) {
virReportSystemError(errno,
_("unable to close file %s"),
path);
goto cleanup;
}
if (virFileWrapperFdClose(wrapperFd) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
if (ret != 0)
unlink(path);
virFileWrapperFdFree(wrapperFd);
VIR_FREE(compressedpath);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainCoreDumpWithFormat(virDomainPtr dom,
const char *path,
unsigned int dumpformat,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
bool resume = false, paused = false;
int ret = -1;
virObjectEventPtr event = NULL;
virCheckFlags(VIR_DUMP_LIVE | VIR_DUMP_CRASH |
VIR_DUMP_BYPASS_CACHE | VIR_DUMP_RESET |
VIR_DUMP_MEMORY_ONLY, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainCoreDumpWithFormatEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginAsyncJob(driver, vm,
QEMU_ASYNC_JOB_DUMP,
VIR_DOMAIN_JOB_OPERATION_DUMP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
/* Migrate will always stop the VM, so the resume condition is
independent of whether the stop command is issued. */
resume = virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING;
/* Pause domain for non-live dump */
if (!(flags & VIR_DUMP_LIVE) &&
virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
if (qemuProcessStopCPUs(driver, vm, VIR_DOMAIN_PAUSED_DUMP,
QEMU_ASYNC_JOB_DUMP) < 0)
goto endjob;
paused = true;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
}
if ((ret = doCoreDump(driver, vm, path, flags, dumpformat)) < 0)
goto endjob;
paused = true;
endjob:
if ((ret == 0) && (flags & VIR_DUMP_CRASH)) {
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_CRASHED,
QEMU_ASYNC_JOB_DUMP, 0);
virDomainAuditStop(vm, "crashed");
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_CRASHED);
} else if (((resume && paused) || (flags & VIR_DUMP_RESET)) &&
virDomainObjIsActive(vm)) {
if ((ret == 0) && (flags & VIR_DUMP_RESET)) {
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemReset(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
}
if (resume && virDomainObjIsActive(vm)) {
if (qemuProcessStartCPUs(driver, vm, dom->conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_DUMP) < 0) {
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR);
if (virGetLastError() == NULL)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("resuming after dump failed"));
}
}
}
qemuDomainObjEndAsyncJob(driver, vm);
if (ret == 0 && flags & VIR_DUMP_CRASH)
qemuDomainRemoveInactive(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
qemuDomainEventQueue(driver, event);
return ret;
}
static int
qemuDomainCoreDump(virDomainPtr dom,
const char *path,
unsigned int flags)
{
return qemuDomainCoreDumpWithFormat(dom, path,
VIR_DOMAIN_CORE_DUMP_FORMAT_RAW,
flags);
}
static char *
qemuDomainScreenshot(virDomainPtr dom,
virStreamPtr st,
unsigned int screen,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
char *tmp = NULL;
int tmp_fd = -1;
char *ret = NULL;
bool unlink_tmp = false;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(0, NULL);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainScreenshotEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
/* Well, even if qemu allows multiple graphic cards, heads, whatever,
* screenshot command does not */
if (screen) {
virReportError(VIR_ERR_INVALID_ARG,
"%s", _("currently is supported only taking "
"screenshots of screen ID 0"));
goto endjob;
}
if (virAsprintf(&tmp, "%s/qemu.screendump.XXXXXX", cfg->cacheDir) < 0)
goto endjob;
if ((tmp_fd = mkostemp(tmp, O_CLOEXEC)) == -1) {
virReportSystemError(errno, _("mkostemp(\"%s\") failed"), tmp);
goto endjob;
}
unlink_tmp = true;
qemuSecuritySetSavedStateLabel(driver->securityManager, vm->def, tmp);
qemuDomainObjEnterMonitor(driver, vm);
if (qemuMonitorScreendump(priv->mon, tmp) < 0) {
ignore_value(qemuDomainObjExitMonitor(driver, vm));
goto endjob;
}
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
if (VIR_CLOSE(tmp_fd) < 0) {
virReportSystemError(errno, _("unable to close %s"), tmp);
goto endjob;
}
if (virFDStreamOpenFile(st, tmp, 0, 0, O_RDONLY) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("unable to open stream"));
goto endjob;
}
ignore_value(VIR_STRDUP(ret, "image/x-portable-pixmap"));
endjob:
VIR_FORCE_CLOSE(tmp_fd);
if (unlink_tmp)
unlink(tmp);
VIR_FREE(tmp);
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static char *
getAutoDumpPath(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
char *dumpfile = NULL;
char *domname = virDomainObjGetShortName(vm->def);
char timestr[100];
struct tm time_info;
time_t curtime = time(NULL);
virQEMUDriverConfigPtr cfg = NULL;
if (!domname)
return NULL;
cfg = virQEMUDriverGetConfig(driver);
localtime_r(&curtime, &time_info);
strftime(timestr, sizeof(timestr), "%Y-%m-%d-%H:%M:%S", &time_info);
ignore_value(virAsprintf(&dumpfile, "%s/%s-%s",
cfg->autoDumpPath,
domname,
timestr));
virObjectUnref(cfg);
VIR_FREE(domname);
return dumpfile;
}
static void
processWatchdogEvent(virQEMUDriverPtr driver,
virDomainObjPtr vm,
int action)
{
int ret;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
char *dumpfile = getAutoDumpPath(driver, vm);
unsigned int flags = VIR_DUMP_MEMORY_ONLY;
if (!dumpfile)
goto cleanup;
switch (action) {
case VIR_DOMAIN_WATCHDOG_ACTION_DUMP:
if (qemuDomainObjBeginAsyncJob(driver, vm,
QEMU_ASYNC_JOB_DUMP,
VIR_DOMAIN_JOB_OPERATION_DUMP) < 0) {
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
flags |= cfg->autoDumpBypassCache ? VIR_DUMP_BYPASS_CACHE: 0;
if ((ret = doCoreDump(driver, vm, dumpfile, flags,
VIR_DOMAIN_CORE_DUMP_FORMAT_RAW)) < 0)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Dump failed"));
ret = qemuProcessStartCPUs(driver, vm, NULL,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_DUMP);
if (ret < 0)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Resuming after dump failed"));
break;
default:
goto cleanup;
}
endjob:
qemuDomainObjEndAsyncJob(driver, vm);
cleanup:
VIR_FREE(dumpfile);
virObjectUnref(cfg);
}
static int
doCoreDumpToAutoDumpPath(virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int flags)
{
int ret = -1;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
char *dumpfile = getAutoDumpPath(driver, vm);
if (!dumpfile)
goto cleanup;
flags |= cfg->autoDumpBypassCache ? VIR_DUMP_BYPASS_CACHE: 0;
if ((ret = doCoreDump(driver, vm, dumpfile, flags,
VIR_DOMAIN_CORE_DUMP_FORMAT_RAW)) < 0)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Dump failed"));
cleanup:
VIR_FREE(dumpfile);
virObjectUnref(cfg);
return ret;
}
static void
qemuProcessGuestPanicEventInfo(virQEMUDriverPtr driver,
virDomainObjPtr vm,
qemuMonitorEventPanicInfoPtr info)
{
char *msg = qemuMonitorGuestPanicEventInfoFormatMsg(info);
char *timestamp = virTimeStringNow();
if (msg && timestamp)
qemuDomainLogAppendMessage(driver, vm, "%s: panic %s\n", timestamp, msg);
VIR_FREE(timestamp);
VIR_FREE(msg);
}
static void
processGuestPanicEvent(virQEMUDriverPtr driver,
virDomainObjPtr vm,
int action,
qemuMonitorEventPanicInfoPtr info)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virObjectEventPtr event = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
bool removeInactive = false;
if (qemuDomainObjBeginAsyncJob(driver, vm, QEMU_ASYNC_JOB_DUMP,
VIR_DOMAIN_JOB_OPERATION_DUMP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
VIR_DEBUG("Ignoring GUEST_PANICKED event from inactive domain %s",
vm->def->name);
goto endjob;
}
if (info)
qemuProcessGuestPanicEventInfo(driver, vm, info);
virDomainObjSetState(vm, VIR_DOMAIN_CRASHED, VIR_DOMAIN_CRASHED_PANICKED);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_CRASHED,
VIR_DOMAIN_EVENT_CRASHED_PANICKED);
qemuDomainEventQueue(driver, event);
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) {
VIR_WARN("Unable to save status on vm %s after state change",
vm->def->name);
}
if (virDomainLockProcessPause(driver->lockManager, vm, &priv->lockState) < 0)
VIR_WARN("Unable to release lease on %s", vm->def->name);
VIR_DEBUG("Preserving lock state '%s'", NULLSTR(priv->lockState));
switch (action) {
case VIR_DOMAIN_LIFECYCLE_CRASH_COREDUMP_DESTROY:
if (doCoreDumpToAutoDumpPath(driver, vm, VIR_DUMP_MEMORY_ONLY) < 0)
goto endjob;
ATTRIBUTE_FALLTHROUGH;
case VIR_DOMAIN_LIFECYCLE_CRASH_DESTROY:
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_CRASHED,
QEMU_ASYNC_JOB_DUMP, 0);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_CRASHED);
qemuDomainEventQueue(driver, event);
virDomainAuditStop(vm, "destroyed");
removeInactive = true;
break;
case VIR_DOMAIN_LIFECYCLE_CRASH_COREDUMP_RESTART:
if (doCoreDumpToAutoDumpPath(driver, vm, VIR_DUMP_MEMORY_ONLY) < 0)
goto endjob;
ATTRIBUTE_FALLTHROUGH;
case VIR_DOMAIN_LIFECYCLE_CRASH_RESTART:
qemuDomainSetFakeReboot(driver, vm, true);
qemuProcessShutdownOrReboot(driver, vm);
break;
case VIR_DOMAIN_LIFECYCLE_CRASH_PRESERVE:
break;
default:
break;
}
endjob:
qemuDomainObjEndAsyncJob(driver, vm);
if (removeInactive)
qemuDomainRemoveInactive(driver, vm);
cleanup:
virObjectUnref(cfg);
}
static void
processDeviceDeletedEvent(virQEMUDriverPtr driver,
virDomainObjPtr vm,
char *devAlias)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
virDomainDeviceDef dev;
VIR_DEBUG("Removing device %s from domain %p %s",
devAlias, vm, vm->def->name);
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
VIR_DEBUG("Domain is not running");
goto endjob;
}
if (STRPREFIX(devAlias, "vcpu")) {
qemuDomainRemoveVcpuAlias(driver, vm, devAlias);
} else {
if (virDomainDefFindDevice(vm->def, devAlias, &dev, true) < 0)
goto endjob;
if (qemuDomainRemoveDevice(driver, vm, &dev) < 0)
goto endjob;
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
VIR_WARN("unable to save domain status after removing device %s",
devAlias);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(devAlias);
virObjectUnref(cfg);
}
static void
syncNicRxFilterMacAddr(char *ifname, virNetDevRxFilterPtr guestFilter,
virNetDevRxFilterPtr hostFilter)
{
char newMacStr[VIR_MAC_STRING_BUFLEN];
if (virMacAddrCmp(&hostFilter->mac, &guestFilter->mac)) {
virMacAddrFormat(&guestFilter->mac, newMacStr);
/* set new MAC address from guest to associated macvtap device */
if (virNetDevSetMAC(ifname, &guestFilter->mac) < 0) {
VIR_WARN("Couldn't set new MAC address %s to device %s "
"while responding to NIC_RX_FILTER_CHANGED",
newMacStr, ifname);
} else {
VIR_DEBUG("device %s MAC address set to %s", ifname, newMacStr);
}
}
}
static void
syncNicRxFilterGuestMulticast(char *ifname, virNetDevRxFilterPtr guestFilter,
virNetDevRxFilterPtr hostFilter)
{
size_t i, j;
bool found;
char macstr[VIR_MAC_STRING_BUFLEN];
for (i = 0; i < guestFilter->multicast.nTable; i++) {
found = false;
for (j = 0; j < hostFilter->multicast.nTable; j++) {
if (virMacAddrCmp(&guestFilter->multicast.table[i],
&hostFilter->multicast.table[j]) == 0) {
found = true;
break;
}
}
if (!found) {
virMacAddrFormat(&guestFilter->multicast.table[i], macstr);
if (virNetDevAddMulti(ifname, &guestFilter->multicast.table[i]) < 0) {
VIR_WARN("Couldn't add new multicast MAC address %s to "
"device %s while responding to NIC_RX_FILTER_CHANGED",
macstr, ifname);
} else {
VIR_DEBUG("Added multicast MAC %s to %s interface",
macstr, ifname);
}
}
}
}
static void
syncNicRxFilterHostMulticast(char *ifname, virNetDevRxFilterPtr guestFilter,
virNetDevRxFilterPtr hostFilter)
{
size_t i, j;
bool found;
char macstr[VIR_MAC_STRING_BUFLEN];
for (i = 0; i < hostFilter->multicast.nTable; i++) {
found = false;
for (j = 0; j < guestFilter->multicast.nTable; j++) {
if (virMacAddrCmp(&hostFilter->multicast.table[i],
&guestFilter->multicast.table[j]) == 0) {
found = true;
break;
}
}
if (!found) {
virMacAddrFormat(&hostFilter->multicast.table[i], macstr);
if (virNetDevDelMulti(ifname, &hostFilter->multicast.table[i]) < 0) {
VIR_WARN("Couldn't delete multicast MAC address %s from "
"device %s while responding to NIC_RX_FILTER_CHANGED",
macstr, ifname);
} else {
VIR_DEBUG("Deleted multicast MAC %s from %s interface",
macstr, ifname);
}
}
}
}
static void
syncNicRxFilterPromiscMode(char *ifname,
virNetDevRxFilterPtr guestFilter,
virNetDevRxFilterPtr hostFilter)
{
bool promisc;
bool setpromisc = false;
/* Set macvtap promisc mode to true if the guest has vlans defined */
/* or synchronize the macvtap promisc mode if different from guest */
if (guestFilter->vlan.nTable > 0) {
if (!hostFilter->promiscuous) {
setpromisc = true;
promisc = true;
}
} else if (hostFilter->promiscuous != guestFilter->promiscuous) {
setpromisc = true;
promisc = guestFilter->promiscuous;
}
if (setpromisc) {
if (virNetDevSetPromiscuous(ifname, promisc) < 0) {
VIR_WARN("Couldn't set PROMISC flag to %s for device %s "
"while responding to NIC_RX_FILTER_CHANGED",
promisc ? "true" : "false", ifname);
}
}
}
static void
syncNicRxFilterMultiMode(char *ifname, virNetDevRxFilterPtr guestFilter,
virNetDevRxFilterPtr hostFilter)
{
if (hostFilter->multicast.mode != guestFilter->multicast.mode) {
switch (guestFilter->multicast.mode) {
case VIR_NETDEV_RX_FILTER_MODE_ALL:
if (virNetDevSetRcvAllMulti(ifname, true)) {
VIR_WARN("Couldn't set allmulticast flag to 'on' for "
"device %s while responding to "
"NIC_RX_FILTER_CHANGED", ifname);
}
break;
case VIR_NETDEV_RX_FILTER_MODE_NORMAL:
if (virNetDevSetRcvMulti(ifname, true)) {
VIR_WARN("Couldn't set multicast flag to 'on' for "
"device %s while responding to "
"NIC_RX_FILTER_CHANGED", ifname);
}
if (virNetDevSetRcvAllMulti(ifname, false)) {
VIR_WARN("Couldn't set allmulticast flag to 'off' for "
"device %s while responding to "
"NIC_RX_FILTER_CHANGED", ifname);
}
break;
case VIR_NETDEV_RX_FILTER_MODE_NONE:
if (virNetDevSetRcvAllMulti(ifname, false)) {
VIR_WARN("Couldn't set allmulticast flag to 'off' for "
"device %s while responding to "
"NIC_RX_FILTER_CHANGED", ifname);
}
if (virNetDevSetRcvMulti(ifname, false)) {
VIR_WARN("Couldn't set multicast flag to 'off' for "
"device %s while responding to "
"NIC_RX_FILTER_CHANGED",
ifname);
}
break;
}
}
}
static void
syncNicRxFilterDeviceOptions(char *ifname, virNetDevRxFilterPtr guestFilter,
virNetDevRxFilterPtr hostFilter)
{
syncNicRxFilterPromiscMode(ifname, guestFilter, hostFilter);
syncNicRxFilterMultiMode(ifname, guestFilter, hostFilter);
}
static void
syncNicRxFilterMulticast(char *ifname,
virNetDevRxFilterPtr guestFilter,
virNetDevRxFilterPtr hostFilter)
{
syncNicRxFilterGuestMulticast(ifname, guestFilter, hostFilter);
syncNicRxFilterHostMulticast(ifname, guestFilter, hostFilter);
}
static void
processNicRxFilterChangedEvent(virQEMUDriverPtr driver,
virDomainObjPtr vm,
char *devAlias)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
qemuDomainObjPrivatePtr priv = vm->privateData;
virDomainDeviceDef dev;
virDomainNetDefPtr def;
virNetDevRxFilterPtr guestFilter = NULL;
virNetDevRxFilterPtr hostFilter = NULL;
int ret;
VIR_DEBUG("Received NIC_RX_FILTER_CHANGED event for device %s "
"from domain %p %s",
devAlias, vm, vm->def->name);
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
VIR_DEBUG("Domain is not running");
goto endjob;
}
if (virDomainDefFindDevice(vm->def, devAlias, &dev, true) < 0) {
VIR_WARN("NIC_RX_FILTER_CHANGED event received for "
"non-existent device %s in domain %s",
devAlias, vm->def->name);
goto endjob;
}
if (dev.type != VIR_DOMAIN_DEVICE_NET) {
VIR_WARN("NIC_RX_FILTER_CHANGED event received for "
"non-network device %s in domain %s",
devAlias, vm->def->name);
goto endjob;
}
def = dev.data.net;
if (!virDomainNetGetActualTrustGuestRxFilters(def)) {
VIR_DEBUG("ignore NIC_RX_FILTER_CHANGED event for network "
"device %s in domain %s",
def->info.alias, vm->def->name);
/* not sending "query-rx-filter" will also suppress any
* further NIC_RX_FILTER_CHANGED events for this device
*/
goto endjob;
}
/* handle the event - send query-rx-filter and respond to it. */
VIR_DEBUG("process NIC_RX_FILTER_CHANGED event for network "
"device %s in domain %s", def->info.alias, vm->def->name);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorQueryRxFilter(priv->mon, devAlias, &guestFilter);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
if (ret < 0)
goto endjob;
if (virDomainNetGetActualType(def) == VIR_DOMAIN_NET_TYPE_DIRECT) {
if (virNetDevGetRxFilter(def->ifname, &hostFilter)) {
VIR_WARN("Couldn't get current RX filter for device %s "
"while responding to NIC_RX_FILTER_CHANGED",
def->ifname);
goto endjob;
}
/* For macvtap connections, set the following macvtap network device
* attributes to match those of the guest network device:
* - MAC address
* - Multicast MAC address table
* - Device options:
* - PROMISC
* - MULTICAST
* - ALLMULTI
*/
syncNicRxFilterMacAddr(def->ifname, guestFilter, hostFilter);
syncNicRxFilterMulticast(def->ifname, guestFilter, hostFilter);
syncNicRxFilterDeviceOptions(def->ifname, guestFilter, hostFilter);
}
if (virDomainNetGetActualType(def) == VIR_DOMAIN_NET_TYPE_NETWORK) {
const char *brname = virDomainNetGetActualBridgeName(def);
/* For libivrt network connections, set the following TUN/TAP network
* device attributes to match those of the guest network device:
* - QoS filters (which are based on MAC address)
*/
if (virDomainNetGetActualBandwidth(def) &&
def->data.network.actual &&
virNetDevBandwidthUpdateFilter(brname, &guestFilter->mac,
def->data.network.actual->class_id) < 0)
goto endjob;
}
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virNetDevRxFilterFree(hostFilter);
virNetDevRxFilterFree(guestFilter);
VIR_FREE(devAlias);
virObjectUnref(cfg);
}
static void
processSerialChangedEvent(virQEMUDriverPtr driver,
virDomainObjPtr vm,
char *devAlias,
bool connected)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
virDomainChrDeviceState newstate;
virObjectEventPtr event = NULL;
virDomainDeviceDef dev;
qemuDomainObjPrivatePtr priv = vm->privateData;
if (connected)
newstate = VIR_DOMAIN_CHR_DEVICE_STATE_CONNECTED;
else
newstate = VIR_DOMAIN_CHR_DEVICE_STATE_DISCONNECTED;
VIR_DEBUG("Changing serial port state %s in domain %p %s",
devAlias, vm, vm->def->name);
if (newstate == VIR_DOMAIN_CHR_DEVICE_STATE_DISCONNECTED &&
virDomainObjIsActive(vm) && priv->agent) {
/* peek into the domain definition to find the channel */
if (virDomainDefFindDevice(vm->def, devAlias, &dev, true) == 0 &&
dev.type == VIR_DOMAIN_DEVICE_CHR &&
dev.data.chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL &&
dev.data.chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO &&
STREQ_NULLABLE(dev.data.chr->target.name, "org.qemu.guest_agent.0"))
/* Close agent monitor early, so that other threads
* waiting for the agent to reply can finish and our
* job we acquire below can succeed. */
qemuAgentNotifyClose(priv->agent);
/* now discard the data, since it may possibly change once we unlock
* while entering the job */
memset(&dev, 0, sizeof(dev));
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
VIR_DEBUG("Domain is not running");
goto endjob;
}
if (virDomainDefFindDevice(vm->def, devAlias, &dev, true) < 0)
goto endjob;
/* we care only about certain devices */
if (dev.type != VIR_DOMAIN_DEVICE_CHR ||
dev.data.chr->deviceType != VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL ||
dev.data.chr->targetType != VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO)
goto endjob;
dev.data.chr->state = newstate;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
VIR_WARN("unable to save status of domain %s after updating state of "
"channel %s", vm->def->name, devAlias);
if (STREQ_NULLABLE(dev.data.chr->target.name, "org.qemu.guest_agent.0")) {
if (newstate == VIR_DOMAIN_CHR_DEVICE_STATE_CONNECTED) {
if (qemuConnectAgent(driver, vm) < 0)
goto endjob;
} else {
if (priv->agent) {
qemuAgentClose(priv->agent);
priv->agent = NULL;
}
priv->agentError = false;
}
event = virDomainEventAgentLifecycleNewFromObj(vm, newstate,
VIR_CONNECT_DOMAIN_EVENT_AGENT_LIFECYCLE_REASON_CHANNEL);
qemuDomainEventQueue(driver, event);
}
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(devAlias);
virObjectUnref(cfg);
}
static void
processBlockJobEvent(virQEMUDriverPtr driver,
virDomainObjPtr vm,
char *diskAlias,
int type,
int status)
{
virDomainDiskDefPtr disk;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
VIR_DEBUG("Domain is not running");
goto endjob;
}
if ((disk = qemuProcessFindDomainDiskByAlias(vm, diskAlias)))
qemuBlockJobEventProcess(driver, vm, disk, QEMU_ASYNC_JOB_NONE, type, status);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(diskAlias);
}
static void
processMonitorEOFEvent(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
int eventReason = VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN;
int stopReason = VIR_DOMAIN_SHUTOFF_SHUTDOWN;
const char *auditReason = "shutdown";
unsigned int stopFlags = 0;
virObjectEventPtr event = NULL;
if (qemuProcessBeginStopJob(driver, vm, QEMU_JOB_DESTROY, true) < 0)
return;
if (!virDomainObjIsActive(vm)) {
VIR_DEBUG("Domain %p '%s' is not active, ignoring EOF",
vm, vm->def->name);
goto endjob;
}
if (priv->monJSON && !priv->gotShutdown) {
VIR_DEBUG("Monitor connection to '%s' closed without SHUTDOWN event; "
"assuming the domain crashed", vm->def->name);
eventReason = VIR_DOMAIN_EVENT_STOPPED_FAILED;
stopReason = VIR_DOMAIN_SHUTOFF_CRASHED;
auditReason = "failed";
}
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN) {
stopFlags |= VIR_QEMU_PROCESS_STOP_MIGRATED;
qemuMigrationErrorSave(driver, vm->def->name,
qemuMonitorLastError(priv->mon));
}
event = virDomainEventLifecycleNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED,
eventReason);
qemuProcessStop(driver, vm, stopReason, QEMU_ASYNC_JOB_NONE, stopFlags);
virDomainAuditStop(vm, auditReason);
qemuDomainEventQueue(driver, event);
endjob:
qemuDomainObjEndJob(driver, vm);
qemuDomainRemoveInactive(driver, vm);
}
static void qemuProcessEventHandler(void *data, void *opaque)
{
struct qemuProcessEvent *processEvent = data;
virDomainObjPtr vm = processEvent->vm;
virQEMUDriverPtr driver = opaque;
VIR_DEBUG("vm=%p, event=%d", vm, processEvent->eventType);
virObjectLock(vm);
switch (processEvent->eventType) {
case QEMU_PROCESS_EVENT_WATCHDOG:
processWatchdogEvent(driver, vm, processEvent->action);
break;
case QEMU_PROCESS_EVENT_GUESTPANIC:
processGuestPanicEvent(driver, vm, processEvent->action,
processEvent->data);
break;
case QEMU_PROCESS_EVENT_DEVICE_DELETED:
processDeviceDeletedEvent(driver, vm, processEvent->data);
break;
case QEMU_PROCESS_EVENT_NIC_RX_FILTER_CHANGED:
processNicRxFilterChangedEvent(driver, vm, processEvent->data);
break;
case QEMU_PROCESS_EVENT_SERIAL_CHANGED:
processSerialChangedEvent(driver, vm, processEvent->data,
processEvent->action);
break;
case QEMU_PROCESS_EVENT_BLOCK_JOB:
processBlockJobEvent(driver, vm,
processEvent->data,
processEvent->action,
processEvent->status);
break;
case QEMU_PROCESS_EVENT_MONITOR_EOF:
processMonitorEOFEvent(driver, vm);
break;
case QEMU_PROCESS_EVENT_LAST:
break;
}
virDomainObjEndAPI(&vm);
VIR_FREE(processEvent);
}
static int
qemuDomainSetVcpusAgent(virDomainObjPtr vm,
unsigned int nvcpus)
{
qemuAgentCPUInfoPtr cpuinfo = NULL;
qemuAgentPtr agent;
int ncpuinfo;
int ret = -1;
if (!qemuDomainAgentAvailable(vm, true))
goto cleanup;
if (nvcpus > virDomainDefGetVcpus(vm->def)) {
virReportError(VIR_ERR_INVALID_ARG,
_("requested vcpu count is greater than the count "
"of enabled vcpus in the domain: %d > %d"),
nvcpus, virDomainDefGetVcpus(vm->def));
goto cleanup;
}
agent = qemuDomainObjEnterAgent(vm);
ncpuinfo = qemuAgentGetVCPUs(agent, &cpuinfo);
qemuDomainObjExitAgent(vm, agent);
agent = NULL;
if (ncpuinfo < 0)
goto cleanup;
if (qemuAgentUpdateCPUInfo(nvcpus, cpuinfo, ncpuinfo) < 0)
goto cleanup;
if (!qemuDomainAgentAvailable(vm, true))
goto cleanup;
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentSetVCPUs(agent, cpuinfo, ncpuinfo);
qemuDomainObjExitAgent(vm, agent);
cleanup:
VIR_FREE(cpuinfo);
return ret;
}
static int
qemuDomainSetVcpusMax(virQEMUDriverPtr driver,
virDomainDefPtr def,
virDomainDefPtr persistentDef,
unsigned int nvcpus)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
unsigned int topologycpus;
int ret = -1;
if (def) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("maximum vcpu count of a live domain can't be modified"));
goto cleanup;
}
if (virDomainNumaGetCPUCountTotal(persistentDef->numa) > nvcpus) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("Number of CPUs in <numa> exceeds the desired "
"maximum vcpu count"));
goto cleanup;
}
if (virDomainDefGetVcpusTopology(persistentDef, &topologycpus) == 0 &&
nvcpus != topologycpus) {
/* allow setting a valid vcpu count for the topology so an invalid
* setting may be corrected via this API */
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("CPU topology doesn't match the desired vcpu count"));
goto cleanup;
}
/* ordering information may become invalid, thus clear it */
virDomainDefVcpuOrderClear(persistentDef);
if (virDomainDefSetVcpusMax(persistentDef, nvcpus, driver->xmlopt) < 0)
goto cleanup;
if (virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainSetVcpusFlags(virDomainPtr dom,
unsigned int nvcpus,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
bool hotpluggable = !!(flags & VIR_DOMAIN_VCPU_HOTPLUGGABLE);
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_VCPU_MAXIMUM |
VIR_DOMAIN_VCPU_GUEST |
VIR_DOMAIN_VCPU_HOTPLUGGABLE, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainSetVcpusFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (flags & VIR_DOMAIN_VCPU_GUEST)
ret = qemuDomainSetVcpusAgent(vm, nvcpus);
else if (flags & VIR_DOMAIN_VCPU_MAXIMUM)
ret = qemuDomainSetVcpusMax(driver, def, persistentDef, nvcpus);
else
ret = qemuDomainSetVcpusInternal(driver, vm, def, persistentDef,
nvcpus, hotpluggable);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainSetVcpus(virDomainPtr dom, unsigned int nvcpus)
{
return qemuDomainSetVcpusFlags(dom, nvcpus, VIR_DOMAIN_AFFECT_LIVE);
}
static int
qemuDomainPinVcpuLive(virDomainObjPtr vm,
virDomainDefPtr def,
int vcpu,
virQEMUDriverPtr driver,
virQEMUDriverConfigPtr cfg,
virBitmapPtr cpumap)
{
virBitmapPtr tmpmap = NULL;
virDomainVcpuDefPtr vcpuinfo;
qemuDomainObjPrivatePtr priv = vm->privateData;
virCgroupPtr cgroup_vcpu = NULL;
char *str = NULL;
virObjectEventPtr event = NULL;
char paramField[VIR_TYPED_PARAM_FIELD_LENGTH] = "";
virTypedParameterPtr eventParams = NULL;
int eventNparams = 0;
int eventMaxparams = 0;
int ret = -1;
if (!qemuDomainHasVcpuPids(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not supported"));
goto cleanup;
}
if (!(vcpuinfo = virDomainDefGetVcpu(def, vcpu))) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu %d is out of range of live cpu count %d"),
vcpu, virDomainDefGetVcpusMax(def));
goto cleanup;
}
if (!(tmpmap = virBitmapNewCopy(cpumap)))
goto cleanup;
if (!(str = virBitmapFormat(cpumap)))
goto cleanup;
if (vcpuinfo->online) {
/* Configure the corresponding cpuset cgroup before set affinity. */
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET)) {
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_VCPU, vcpu,
false, &cgroup_vcpu) < 0)
goto cleanup;
if (qemuSetupCgroupCpusetCpus(cgroup_vcpu, cpumap) < 0)
goto cleanup;
}
if (virProcessSetAffinity(qemuDomainGetVcpuPid(vm, vcpu), cpumap) < 0)
goto cleanup;
}
virBitmapFree(vcpuinfo->cpumask);
vcpuinfo->cpumask = tmpmap;
tmpmap = NULL;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto cleanup;
if (snprintf(paramField, VIR_TYPED_PARAM_FIELD_LENGTH,
VIR_DOMAIN_TUNABLE_CPU_VCPUPIN, vcpu) < 0) {
goto cleanup;
}
if (virTypedParamsAddString(&eventParams, &eventNparams,
&eventMaxparams, paramField, str) < 0)
goto cleanup;
event = virDomainEventTunableNewFromObj(vm, eventParams, eventNparams);
ret = 0;
cleanup:
virBitmapFree(tmpmap);
virCgroupFree(&cgroup_vcpu);
VIR_FREE(str);
qemuDomainEventQueue(driver, event);
return ret;
}
static int
qemuDomainPinVcpuFlags(virDomainPtr dom,
unsigned int vcpu,
unsigned char *cpumap,
int maplen,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
int ret = -1;
virBitmapPtr pcpumap = NULL;
virDomainVcpuDefPtr vcpuinfo = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
cfg = virQEMUDriverGetConfig(driver);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainPinVcpuFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if ((def && def->virtType == VIR_DOMAIN_VIRT_QEMU) ||
(persistentDef && persistentDef->virtType == VIR_DOMAIN_VIRT_QEMU)) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Virt type 'qemu' does not support vCPU pinning"));
goto endjob;
}
if (persistentDef &&
!(vcpuinfo = virDomainDefGetVcpu(persistentDef, vcpu))) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu %d is out of range of persistent cpu count %d"),
vcpu, virDomainDefGetVcpus(persistentDef));
goto endjob;
}
if (!(pcpumap = virBitmapNewData(cpumap, maplen)))
goto endjob;
if (virBitmapIsAllClear(pcpumap)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("Empty cpu list for pinning"));
goto endjob;
}
if (def &&
qemuDomainPinVcpuLive(vm, def, vcpu, driver, cfg, pcpumap) < 0)
goto endjob;
if (persistentDef) {
virBitmapFree(vcpuinfo->cpumask);
vcpuinfo->cpumask = pcpumap;
pcpumap = NULL;
ret = virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef);
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virBitmapFree(pcpumap);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainPinVcpu(virDomainPtr dom,
unsigned int vcpu,
unsigned char *cpumap,
int maplen)
{
return qemuDomainPinVcpuFlags(dom, vcpu, cpumap, maplen,
VIR_DOMAIN_AFFECT_LIVE);
}
static int
qemuDomainGetVcpuPinInfo(virDomainPtr dom,
int ncpumaps,
unsigned char *cpumaps,
int maplen,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
virDomainDefPtr def;
bool live;
int ret = -1;
virBitmapPtr autoCpuset = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetVcpuPinInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!(def = virDomainObjGetOneDefState(vm, flags, &live)))
goto cleanup;
if (live)
autoCpuset = QEMU_DOMAIN_PRIVATE(vm)->autoCpuset;
ret = virDomainDefGetVcpuPinInfoHelper(def, maplen, ncpumaps, cpumaps,
virHostCPUGetCount(), autoCpuset);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainPinEmulator(virDomainPtr dom,
unsigned char *cpumap,
int maplen,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virCgroupPtr cgroup_emulator = NULL;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virBitmapPtr pcpumap = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virObjectEventPtr event = NULL;
char *str = NULL;
virTypedParameterPtr eventParams = NULL;
int eventNparams = 0;
int eventMaxparams = 0;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
cfg = virQEMUDriverGetConfig(driver);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainPinEmulatorEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
priv = vm->privateData;
if (!(pcpumap = virBitmapNewData(cpumap, maplen)))
goto endjob;
if (virBitmapIsAllClear(pcpumap)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("Empty cpu list for pinning"));
goto endjob;
}
if (def) {
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET)) {
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_EMULATOR,
0, false, &cgroup_emulator) < 0)
goto endjob;
if (qemuSetupCgroupCpusetCpus(cgroup_emulator, pcpumap) < 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("failed to set cpuset.cpus in cgroup"
" for emulator threads"));
goto endjob;
}
}
if (virProcessSetAffinity(vm->pid, pcpumap) < 0)
goto endjob;
virBitmapFree(def->cputune.emulatorpin);
def->cputune.emulatorpin = NULL;
if (!(def->cputune.emulatorpin = virBitmapNewCopy(pcpumap)))
goto endjob;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
str = virBitmapFormat(pcpumap);
if (virTypedParamsAddString(&eventParams, &eventNparams,
&eventMaxparams,
VIR_DOMAIN_TUNABLE_CPU_EMULATORPIN,
str) < 0)
goto endjob;
event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
}
if (persistentDef) {
virBitmapFree(persistentDef->cputune.emulatorpin);
persistentDef->cputune.emulatorpin = NULL;
if (!(persistentDef->cputune.emulatorpin = virBitmapNewCopy(pcpumap)))
goto endjob;
ret = virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef);
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
if (cgroup_emulator)
virCgroupFree(&cgroup_emulator);
qemuDomainEventQueue(driver, event);
VIR_FREE(str);
virBitmapFree(pcpumap);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetEmulatorPinInfo(virDomainPtr dom,
unsigned char *cpumaps,
int maplen,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
virDomainDefPtr def;
bool live;
int ret = -1;
int hostcpus;
virBitmapPtr cpumask = NULL;
virBitmapPtr bitmap = NULL;
virBitmapPtr autoCpuset = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetEmulatorPinInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!(def = virDomainObjGetOneDefState(vm, flags, &live)))
goto cleanup;
if ((hostcpus = virHostCPUGetCount()) < 0)
goto cleanup;
if (live)
autoCpuset = QEMU_DOMAIN_PRIVATE(vm)->autoCpuset;
if (def->cputune.emulatorpin) {
cpumask = def->cputune.emulatorpin;
} else if (def->cpumask) {
cpumask = def->cpumask;
} else if (vm->def->placement_mode == VIR_DOMAIN_CPU_PLACEMENT_MODE_AUTO &&
autoCpuset) {
cpumask = autoCpuset;
} else {
if (!(bitmap = virBitmapNew(hostcpus)))
goto cleanup;
virBitmapSetAll(bitmap);
cpumask = bitmap;
}
virBitmapToDataBuf(cpumask, cpumaps, maplen);
ret = 1;
cleanup:
virDomainObjEndAPI(&vm);
virBitmapFree(bitmap);
return ret;
}
static int
qemuDomainGetVcpus(virDomainPtr dom,
virVcpuInfoPtr info,
int maxinfo,
unsigned char *cpumaps,
int maplen)
{
virDomainObjPtr vm;
int ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetVcpusEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot retrieve vcpu information for inactive domain"));
goto cleanup;
}
ret = qemuDomainHelperGetVcpus(vm, info, NULL, maxinfo, cpumaps, maplen,
NULL);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetVcpusFlags(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr def;
int ret = -1;
qemuAgentCPUInfoPtr cpuinfo = NULL;
qemuAgentPtr agent;
int ncpuinfo = -1;
size_t i;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_VCPU_MAXIMUM |
VIR_DOMAIN_VCPU_GUEST, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainGetVcpusFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (!(def = virDomainObjGetOneDef(vm, flags)))
goto cleanup;
if (flags & VIR_DOMAIN_VCPU_GUEST) {
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("vCPU count provided by the guest agent can only be "
"requested for live domains"));
goto endjob;
}
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
ncpuinfo = qemuAgentGetVCPUs(agent, &cpuinfo);
qemuDomainObjExitAgent(vm, agent);
endjob:
qemuDomainObjEndJob(driver, vm);
if (ncpuinfo < 0)
goto cleanup;
if (flags & VIR_DOMAIN_VCPU_MAXIMUM) {
ret = ncpuinfo;
goto cleanup;
}
/* count the online vcpus */
ret = 0;
for (i = 0; i < ncpuinfo; i++) {
if (cpuinfo[i].online)
ret++;
}
} else {
if (flags & VIR_DOMAIN_VCPU_MAXIMUM)
ret = virDomainDefGetVcpusMax(def);
else
ret = virDomainDefGetVcpus(def);
}
cleanup:
virDomainObjEndAPI(&vm);
VIR_FREE(cpuinfo);
return ret;
}
static int
qemuDomainGetMaxVcpus(virDomainPtr dom)
{
return qemuDomainGetVcpusFlags(dom, (VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_VCPU_MAXIMUM));
}
static int
qemuDomainGetIOThreadsLive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainIOThreadInfoPtr **info)
{
qemuDomainObjPrivatePtr priv;
qemuMonitorIOThreadInfoPtr *iothreads = NULL;
virDomainIOThreadInfoPtr *info_ret = NULL;
int niothreads = 0;
size_t i;
int ret = -1;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot list IOThreads for an inactive domain"));
goto endjob;
}
priv = vm->privateData;
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_IOTHREAD)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("IOThreads not supported with this binary"));
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
niothreads = qemuMonitorGetIOThreads(priv->mon, &iothreads);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
if (niothreads < 0)
goto endjob;
/* Nothing to do */
if (niothreads == 0) {
ret = 0;
goto endjob;
}
if (VIR_ALLOC_N(info_ret, niothreads) < 0)
goto endjob;
for (i = 0; i < niothreads; i++) {
virBitmapPtr map = NULL;
if (VIR_ALLOC(info_ret[i]) < 0)
goto endjob;
info_ret[i]->iothread_id = iothreads[i]->iothread_id;
if (!(map = virProcessGetAffinity(iothreads[i]->thread_id)))
goto endjob;
if (virBitmapToData(map, &info_ret[i]->cpumap,
&info_ret[i]->cpumaplen) < 0) {
virBitmapFree(map);
goto endjob;
}
virBitmapFree(map);
}
*info = info_ret;
info_ret = NULL;
ret = niothreads;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
if (info_ret) {
for (i = 0; i < niothreads; i++)
virDomainIOThreadInfoFree(info_ret[i]);
VIR_FREE(info_ret);
}
if (iothreads) {
for (i = 0; i < niothreads; i++)
VIR_FREE(iothreads[i]);
VIR_FREE(iothreads);
}
return ret;
}
static int
qemuDomainGetIOThreadsConfig(virDomainDefPtr targetDef,
virDomainIOThreadInfoPtr **info)
{
virDomainIOThreadInfoPtr *info_ret = NULL;
virBitmapPtr bitmap = NULL;
virBitmapPtr cpumask = NULL;
int hostcpus;
size_t i;
int ret = -1;
if (targetDef->niothreadids == 0)
return 0;
if ((hostcpus = virHostCPUGetCount()) < 0)
goto cleanup;
if (VIR_ALLOC_N(info_ret, targetDef->niothreadids) < 0)
goto cleanup;
for (i = 0; i < targetDef->niothreadids; i++) {
if (VIR_ALLOC(info_ret[i]) < 0)
goto cleanup;
/* IOThread ID's are taken from the iothreadids list */
info_ret[i]->iothread_id = targetDef->iothreadids[i]->iothread_id;
cpumask = targetDef->iothreadids[i]->cpumask;
if (!cpumask) {
if (targetDef->cpumask) {
cpumask = targetDef->cpumask;
} else {
if (!(bitmap = virBitmapNew(hostcpus)))
goto cleanup;
virBitmapSetAll(bitmap);
cpumask = bitmap;
}
}
if (virBitmapToData(cpumask, &info_ret[i]->cpumap,
&info_ret[i]->cpumaplen) < 0)
goto cleanup;
virBitmapFree(bitmap);
bitmap = NULL;
}
*info = info_ret;
info_ret = NULL;
ret = targetDef->niothreadids;
cleanup:
if (info_ret) {
for (i = 0; i < targetDef->niothreadids; i++)
virDomainIOThreadInfoFree(info_ret[i]);
VIR_FREE(info_ret);
}
virBitmapFree(bitmap);
return ret;
}
static int
qemuDomainGetIOThreadInfo(virDomainPtr dom,
virDomainIOThreadInfoPtr **info,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr targetDef = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetIOThreadInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, NULL, &targetDef) < 0)
goto cleanup;
if (!targetDef)
ret = qemuDomainGetIOThreadsLive(driver, vm, info);
else
ret = qemuDomainGetIOThreadsConfig(targetDef, info);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainPinIOThread(virDomainPtr dom,
unsigned int iothread_id,
unsigned char *cpumap,
int maplen,
unsigned int flags)
{
int ret = -1;
virQEMUDriverPtr driver = dom->conn->privateData;
virQEMUDriverConfigPtr cfg = NULL;
virDomainObjPtr vm;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
virBitmapPtr pcpumap = NULL;
qemuDomainObjPrivatePtr priv;
virCgroupPtr cgroup_iothread = NULL;
virObjectEventPtr event = NULL;
char paramField[VIR_TYPED_PARAM_FIELD_LENGTH] = "";
char *str = NULL;
virTypedParameterPtr eventParams = NULL;
int eventNparams = 0;
int eventMaxparams = 0;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
cfg = virQEMUDriverGetConfig(driver);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainPinIOThreadEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (!(pcpumap = virBitmapNewData(cpumap, maplen)))
goto endjob;
if (virBitmapIsAllClear(pcpumap)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("Empty iothread cpumap list for pinning"));
goto endjob;
}
if (def) {
virDomainIOThreadIDDefPtr iothrid;
virBitmapPtr cpumask;
if (!(iothrid = virDomainIOThreadIDFind(def, iothread_id))) {
virReportError(VIR_ERR_INVALID_ARG,
_("iothread %d not found"), iothread_id);
goto endjob;
}
if (!(cpumask = virBitmapNewData(cpumap, maplen)))
goto endjob;
virBitmapFree(iothrid->cpumask);
iothrid->cpumask = cpumask;
iothrid->autofill = false;
/* Configure the corresponding cpuset cgroup before set affinity. */
if (virCgroupHasController(priv->cgroup,
VIR_CGROUP_CONTROLLER_CPUSET)) {
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_IOTHREAD,
iothread_id, false, &cgroup_iothread) < 0)
goto endjob;
if (qemuSetupCgroupCpusetCpus(cgroup_iothread, pcpumap) < 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("failed to set cpuset.cpus in cgroup"
" for iothread %d"), iothread_id);
goto endjob;
}
}
if (virProcessSetAffinity(iothrid->thread_id, pcpumap) < 0)
goto endjob;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
if (snprintf(paramField, VIR_TYPED_PARAM_FIELD_LENGTH,
VIR_DOMAIN_TUNABLE_CPU_IOTHREADSPIN, iothread_id) < 0) {
goto endjob;
}
str = virBitmapFormat(pcpumap);
if (virTypedParamsAddString(&eventParams, &eventNparams,
&eventMaxparams, paramField, str) < 0)
goto endjob;
event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
}
if (persistentDef) {
virDomainIOThreadIDDefPtr iothrid;
virBitmapPtr cpumask;
if (!(iothrid = virDomainIOThreadIDFind(persistentDef, iothread_id))) {
virReportError(VIR_ERR_INVALID_ARG,
_("iothreadid %d not found"), iothread_id);
goto endjob;
}
if (!(cpumask = virBitmapNewData(cpumap, maplen)))
goto endjob;
virBitmapFree(iothrid->cpumask);
iothrid->cpumask = cpumask;
iothrid->autofill = false;
ret = virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef);
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
if (cgroup_iothread)
virCgroupFree(&cgroup_iothread);
qemuDomainEventQueue(driver, event);
VIR_FREE(str);
virBitmapFree(pcpumap);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainHotplugAddIOThread(virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int iothread_id)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
char *alias = NULL;
size_t idx;
int rc = -1;
int ret = -1;
unsigned int orig_niothreads = vm->def->niothreadids;
unsigned int exp_niothreads = vm->def->niothreadids;
int new_niothreads = 0;
qemuMonitorIOThreadInfoPtr *new_iothreads = NULL;
virDomainIOThreadIDDefPtr iothrid;
if (virAsprintf(&alias, "iothread%u", iothread_id) < 0)
return -1;
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorAddObject(priv->mon, "iothread", alias, NULL);
exp_niothreads++;
if (rc < 0)
goto exit_monitor;
/* After hotplugging the IOThreads we need to re-detect the
* IOThreads thread_id's, adjust the cgroups, thread affinity,
* and add the thread_id to the vm->def->iothreadids list.
*/
if ((new_niothreads = qemuMonitorGetIOThreads(priv->mon,
&new_iothreads)) < 0)
goto exit_monitor;
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto cleanup;
if (new_niothreads != exp_niothreads) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("got wrong number of IOThread ids from QEMU monitor. "
"got %d, wanted %d"),
new_niothreads, exp_niothreads);
goto cleanup;
}
/*
* If we've successfully added an IOThread, find out where we added it
* in the QEMU IOThread list, so we can add it to our iothreadids list
*/
for (idx = 0; idx < new_niothreads; idx++) {
if (new_iothreads[idx]->iothread_id == iothread_id)
break;
}
if (idx == new_niothreads) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find new IOThread '%u' in QEMU monitor."),
iothread_id);
goto cleanup;
}
if (!(iothrid = virDomainIOThreadIDAdd(vm->def, iothread_id)))
goto cleanup;
iothrid->thread_id = new_iothreads[idx]->thread_id;
if (qemuProcessSetupIOThread(vm, iothrid) < 0)
goto cleanup;
ret = 0;
cleanup:
if (new_iothreads) {
for (idx = 0; idx < new_niothreads; idx++)
VIR_FREE(new_iothreads[idx]);
VIR_FREE(new_iothreads);
}
virDomainAuditIOThread(vm, orig_niothreads, new_niothreads,
"update", rc == 0);
VIR_FREE(alias);
return ret;
exit_monitor:
ignore_value(qemuDomainObjExitMonitor(driver, vm));
goto cleanup;
}
static int
qemuDomainHotplugDelIOThread(virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int iothread_id)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
size_t idx;
char *alias = NULL;
int rc = -1;
int ret = -1;
unsigned int orig_niothreads = vm->def->niothreadids;
unsigned int exp_niothreads = vm->def->niothreadids;
int new_niothreads = 0;
qemuMonitorIOThreadInfoPtr *new_iothreads = NULL;
if (virAsprintf(&alias, "iothread%u", iothread_id) < 0)
return -1;
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorDelObject(priv->mon, alias);
exp_niothreads--;
if (rc < 0)
goto exit_monitor;
if ((new_niothreads = qemuMonitorGetIOThreads(priv->mon,
&new_iothreads)) < 0)
goto exit_monitor;
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto cleanup;
if (new_niothreads != exp_niothreads) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("got wrong number of IOThread ids from QEMU monitor. "
"got %d, wanted %d"),
new_niothreads, exp_niothreads);
goto cleanup;
}
virDomainIOThreadIDDel(vm->def, iothread_id);
if (virCgroupDelThread(priv->cgroup, VIR_CGROUP_THREAD_IOTHREAD,
iothread_id) < 0)
goto cleanup;
ret = 0;
cleanup:
if (new_iothreads) {
for (idx = 0; idx < new_niothreads; idx++)
VIR_FREE(new_iothreads[idx]);
VIR_FREE(new_iothreads);
}
virDomainAuditIOThread(vm, orig_niothreads, new_niothreads,
"update", rc == 0);
VIR_FREE(alias);
return ret;
exit_monitor:
ignore_value(qemuDomainObjExitMonitor(driver, vm));
goto cleanup;
}
static int
qemuDomainAddIOThreadCheck(virDomainDefPtr def,
unsigned int iothread_id)
{
if (virDomainIOThreadIDFind(def, iothread_id)) {
virReportError(VIR_ERR_INVALID_ARG,
_("an IOThread is already using iothread_id '%u'"),
iothread_id);
return -1;
}
return 0;
}
static int
qemuDomainDelIOThreadCheck(virDomainDefPtr def,
unsigned int iothread_id)
{
size_t i;
if (!virDomainIOThreadIDFind(def, iothread_id)) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot find IOThread '%u' in iothreadids list"),
iothread_id);
return -1;
}
for (i = 0; i < def->ndisks; i++) {
if (def->disks[i]->iothread == iothread_id) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot remove IOThread %u since it "
"is being used by disk '%s'"),
iothread_id, def->disks[i]->dst);
return -1;
}
}
for (i = 0; i < def->ncontrollers; i++) {
if (def->controllers[i]->iothread == iothread_id) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot remove IOThread '%u' since it "
"is being used by controller"),
iothread_id);
return -1;
}
}
return 0;
}
static int
qemuDomainChgIOThread(virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int iothread_id,
bool add,
unsigned int flags)
{
virQEMUDriverConfigPtr cfg = NULL;
qemuDomainObjPrivatePtr priv;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
int ret = -1;
cfg = virQEMUDriverGetConfig(driver);
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (def) {
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_IOTHREAD)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("IOThreads not supported with this binary"));
goto endjob;
}
if (add) {
if (qemuDomainAddIOThreadCheck(def, iothread_id) < 0)
goto endjob;
if (qemuDomainHotplugAddIOThread(driver, vm, iothread_id) < 0)
goto endjob;
} else {
if (qemuDomainDelIOThreadCheck(def, iothread_id) < 0)
goto endjob;
if (qemuDomainHotplugDelIOThread(driver, vm, iothread_id) < 0)
goto endjob;
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
}
if (persistentDef) {
if (add) {
if (qemuDomainAddIOThreadCheck(persistentDef, iothread_id) < 0)
goto endjob;
if (!virDomainIOThreadIDAdd(persistentDef, iothread_id))
goto endjob;
} else {
if (qemuDomainDelIOThreadCheck(persistentDef, iothread_id) < 0)
goto endjob;
virDomainIOThreadIDDel(persistentDef, iothread_id);
}
if (virDomainSaveConfig(cfg->configDir, driver->caps,
persistentDef) < 0)
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainAddIOThread(virDomainPtr dom,
unsigned int iothread_id,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (iothread_id == 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("invalid value of 0 for iothread_id"));
return -1;
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainAddIOThreadEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
ret = qemuDomainChgIOThread(driver, vm, iothread_id, true, flags);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainDelIOThread(virDomainPtr dom,
unsigned int iothread_id,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (iothread_id == 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("invalid value of 0 for iothread_id"));
return -1;
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainDelIOThreadEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
ret = qemuDomainChgIOThread(driver, vm, iothread_id, false, flags);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDomainGetSecurityLabel(virDomainPtr dom, virSecurityLabelPtr seclabel)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
memset(seclabel, 0, sizeof(*seclabel));
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainGetSecurityLabelEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainVirtTypeToString(vm->def->virtType)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown virt type in domain definition '%d'"),
vm->def->virtType);
goto cleanup;
}
/*
* Theoretically, the pid can be replaced during this operation and
* return the label of a different process. If atomicity is needed,
* further validation will be required.
*
* Comment from Dan Berrange:
*
* Well the PID as stored in the virDomainObjPtr can't be changed
* because you've got a locked object. The OS level PID could have
* exited, though and in extreme circumstances have cycled through all
* PIDs back to ours. We could sanity check that our PID still exists
* after reading the label, by checking that our FD connecting to the
* QEMU monitor hasn't seen SIGHUP/ERR on poll().
*/
if (virDomainObjIsActive(vm)) {
if (qemuSecurityGetProcessLabel(driver->securityManager,
vm->def, vm->pid, seclabel) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Failed to get security label"));
goto cleanup;
}
}
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDomainGetSecurityLabelList(virDomainPtr dom,
virSecurityLabelPtr* seclabels)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
size_t i;
int ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainGetSecurityLabelListEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainVirtTypeToString(vm->def->virtType)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown virt type in domain definition '%d'"),
vm->def->virtType);
goto cleanup;
}
/*
* Check the comment in qemuDomainGetSecurityLabel function.
*/
if (!virDomainObjIsActive(vm)) {
/* No seclabels */
*seclabels = NULL;
ret = 0;
} else {
int len = 0;
virSecurityManagerPtr* mgrs = qemuSecurityGetNested(driver->securityManager);
if (!mgrs)
goto cleanup;
/* Allocate seclabels array */
for (i = 0; mgrs[i]; i++)
len++;
if (VIR_ALLOC_N((*seclabels), len) < 0) {
VIR_FREE(mgrs);
goto cleanup;
}
memset(*seclabels, 0, sizeof(**seclabels) * len);
/* Fill the array */
for (i = 0; i < len; i++) {
if (qemuSecurityGetProcessLabel(mgrs[i], vm->def, vm->pid,
&(*seclabels)[i]) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Failed to get security label"));
VIR_FREE(mgrs);
VIR_FREE(*seclabels);
goto cleanup;
}
}
ret = len;
VIR_FREE(mgrs);
}
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuNodeGetSecurityModel(virConnectPtr conn,
virSecurityModelPtr secmodel)
{
virQEMUDriverPtr driver = conn->privateData;
char *p;
int ret = 0;
virCapsPtr caps = NULL;
memset(secmodel, 0, sizeof(*secmodel));
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virNodeGetSecurityModelEnsureACL(conn) < 0)
goto cleanup;
/* We treat no driver as success, but simply return no data in *secmodel */
if (caps->host.nsecModels == 0 ||
caps->host.secModels[0].model == NULL)
goto cleanup;
p = caps->host.secModels[0].model;
if (strlen(p) >= VIR_SECURITY_MODEL_BUFLEN-1) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("security model string exceeds max %d bytes"),
VIR_SECURITY_MODEL_BUFLEN-1);
ret = -1;
goto cleanup;
}
strcpy(secmodel->model, p);
p = caps->host.secModels[0].doi;
if (strlen(p) >= VIR_SECURITY_DOI_BUFLEN-1) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("security DOI string exceeds max %d bytes"),
VIR_SECURITY_DOI_BUFLEN-1);
ret = -1;
goto cleanup;
}
strcpy(secmodel->doi, p);
cleanup:
virObjectUnref(caps);
return ret;
}
/**
* qemuDomainSaveImageUpdateDef:
* @driver: qemu driver data
* @def: def of the domain from the save image
* @newxml: user provided replacement XML
*
* Returns the new domain definition in case @newxml is ABI compatible with the
* guest.
*/
static virDomainDefPtr
qemuDomainSaveImageUpdateDef(virQEMUDriverPtr driver,
virDomainDefPtr def,
const char *newxml)
{
virDomainDefPtr ret = NULL;
virDomainDefPtr newdef_migr = NULL;
virDomainDefPtr newdef = NULL;
virCapsPtr caps = NULL;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(newdef = virDomainDefParseString(newxml, caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE)))
goto cleanup;
if (!(newdef_migr = qemuDomainDefCopy(driver,
newdef,
QEMU_DOMAIN_FORMAT_LIVE_FLAGS |
VIR_DOMAIN_XML_MIGRATABLE)))
goto cleanup;
if (!virDomainDefCheckABIStability(def, newdef_migr, driver->xmlopt)) {
virErrorPtr err = virSaveLastError();
/* Due to a bug in older version of external snapshot creation
* code, the XML saved in the save image was not a migratable
* XML. To ensure backwards compatibility with the change of the
* saved XML type, we need to check the ABI compatibility against
* the user provided XML if the check against the migratable XML
* fails. Snapshots created prior to v1.1.3 have this issue. */
if (!virDomainDefCheckABIStability(def, newdef, driver->xmlopt)) {
virSetError(err);
virFreeError(err);
goto cleanup;
}
virFreeError(err);
/* use the user provided XML */
ret = newdef;
newdef = NULL;
} else {
ret = newdef_migr;
newdef_migr = NULL;
}
cleanup:
virObjectUnref(caps);
virDomainDefFree(newdef);
virDomainDefFree(newdef_migr);
return ret;
}
/**
* qemuDomainSaveImageOpen:
* @driver: qemu driver data
* @path: path of the save image
* @ret_def: returns domain definition created from the XML stored in the image
* @ret_data: returns structure filled with data from the image header
* @bypass_cache: bypass cache when opening the file
* @wrapperFd: returns the file wrapper structure
* @open_write: open the file for writing (for updates)
* @unlink_corrupt: remove the image file if it is corrupted
*
* Returns the opened fd of the save image file and fills the appropriate fields
* on success. On error returns -1 on most failures, -3 if corrupt image was
* unlinked (no error raised).
*/
static int ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4)
qemuDomainSaveImageOpen(virQEMUDriverPtr driver,
const char *path,
virDomainDefPtr *ret_def,
virQEMUSaveDataPtr *ret_data,
bool bypass_cache,
virFileWrapperFdPtr *wrapperFd,
bool open_write,
bool unlink_corrupt)
{
int fd = -1;
virQEMUSaveDataPtr data = NULL;
virQEMUSaveHeaderPtr header;
virDomainDefPtr def = NULL;
int oflags = open_write ? O_RDWR : O_RDONLY;
virCapsPtr caps = NULL;
size_t xml_len;
size_t cookie_len;
if (bypass_cache) {
int directFlag = virFileDirectFdFlag();
if (directFlag < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("bypass cache unsupported by this system"));
goto error;
}
oflags |= directFlag;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto error;
if ((fd = qemuOpenFile(driver, NULL, path, oflags, NULL, NULL)) < 0)
goto error;
if (bypass_cache &&
!(*wrapperFd = virFileWrapperFdNew(&fd, path,
VIR_FILE_WRAPPER_BYPASS_CACHE)))
goto error;
if (VIR_ALLOC(data) < 0)
goto error;
header = &data->header;
if (saferead(fd, header, sizeof(*header)) != sizeof(*header)) {
if (unlink_corrupt) {
if (VIR_CLOSE(fd) < 0 || unlink(path) < 0) {
virReportSystemError(errno,
_("cannot remove corrupt file: %s"),
path);
} else {
fd = -3;
}
} else {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to read qemu header"));
}
goto error;
}
if (memcmp(header->magic, QEMU_SAVE_MAGIC, sizeof(header->magic)) != 0) {
const char *msg = _("image magic is incorrect");
if (memcmp(header->magic, QEMU_SAVE_PARTIAL,
sizeof(header->magic)) == 0) {
msg = _("save image is incomplete");
if (unlink_corrupt) {
if (VIR_CLOSE(fd) < 0 || unlink(path) < 0) {
virReportSystemError(errno,
_("cannot remove corrupt file: %s"),
path);
} else {
fd = -3;
}
goto error;
}
}
virReportError(VIR_ERR_OPERATION_FAILED, "%s", msg);
goto error;
}
if (header->version > QEMU_SAVE_VERSION) {
/* convert endianess and try again */
bswap_header(header);
}
if (header->version > QEMU_SAVE_VERSION) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("image version is not supported (%d > %d)"),
header->version, QEMU_SAVE_VERSION);
goto error;
}
if (header->data_len <= 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("invalid header data length: %d"), header->data_len);
goto error;
}
if (header->cookieOffset)
xml_len = header->cookieOffset;
else
xml_len = header->data_len;
cookie_len = header->data_len - xml_len;
if (VIR_ALLOC_N(data->xml, xml_len) < 0)
goto error;
if (saferead(fd, data->xml, xml_len) != xml_len) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to read domain XML"));
goto error;
}
if (cookie_len > 0) {
if (VIR_ALLOC_N(data->cookie, cookie_len) < 0)
goto error;
if (saferead(fd, data->cookie, cookie_len) != cookie_len) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("failed to read cookie"));
goto error;
}
}
/* Create a domain from this XML */
if (!(def = virDomainDefParseString(data->xml, caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
goto error;
*ret_def = def;
*ret_data = data;
cleanup:
virObjectUnref(caps);
return fd;
error:
virDomainDefFree(def);
virQEMUSaveDataFree(data);
VIR_FORCE_CLOSE(fd);
goto cleanup;
}
static int ATTRIBUTE_NONNULL(4) ATTRIBUTE_NONNULL(5) ATTRIBUTE_NONNULL(6)
qemuDomainSaveImageStartVM(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
int *fd,
virQEMUSaveDataPtr data,
const char *path,
bool start_paused,
qemuDomainAsyncJob asyncJob)
{
int ret = -1;
bool restored = false;
virObjectEventPtr event;
int intermediatefd = -1;
virCommandPtr cmd = NULL;
char *errbuf = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
virQEMUSaveHeaderPtr header = &data->header;
qemuDomainSaveCookiePtr cookie = NULL;
if (virSaveCookieParseString(data->cookie, (virObjectPtr *) &cookie,
virDomainXMLOptionGetSaveCookie(driver->xmlopt)) < 0)
goto cleanup;
if ((header->version == 2) &&
(header->compressed != QEMU_SAVE_FORMAT_RAW)) {
if (!(cmd = qemuCompressGetCommand(header->compressed)))
goto cleanup;
intermediatefd = *fd;
*fd = -1;
virCommandSetInputFD(cmd, intermediatefd);
virCommandSetOutputFD(cmd, fd);
virCommandSetErrorBuffer(cmd, &errbuf);
virCommandDoAsyncIO(cmd);
if (virCommandRunAsync(cmd, NULL) < 0) {
*fd = intermediatefd;
goto cleanup;
}
}
if (qemuProcessStart(conn, driver, vm, cookie ? cookie->cpu : NULL,
asyncJob, "stdio", *fd, path, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_RESTORE,
VIR_QEMU_PROCESS_START_PAUSED) == 0)
restored = true;
if (intermediatefd != -1) {
if (!restored) {
/* if there was an error setting up qemu, the intermediate
* process will wait forever to write to stdout, so we
* must manually kill it.
*/
VIR_FORCE_CLOSE(intermediatefd);
VIR_FORCE_CLOSE(*fd);
}
if (virCommandWait(cmd, NULL) < 0) {
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FAILED, asyncJob, 0);
restored = false;
}
VIR_DEBUG("Decompression binary stderr: %s", NULLSTR(errbuf));
}
VIR_FORCE_CLOSE(intermediatefd);
if (VIR_CLOSE(*fd) < 0) {
virReportSystemError(errno, _("cannot close file: %s"), path);
restored = false;
}
virDomainAuditStart(vm, "restored", restored);
if (!restored)
goto cleanup;
/* qemuProcessStart doesn't unset the qemu error reporting infrastructure
* in case of migration (which is used in this case) so we need to reset it
* so that the handle to virtlogd is not held open unnecessarily */
qemuMonitorSetDomainLog(qemuDomainGetMonitor(vm), NULL, NULL, NULL);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_RESTORED);
qemuDomainEventQueue(driver, event);
/* If it was running before, resume it now unless caller requested pause. */
if (header->was_running && !start_paused) {
if (qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_RESTORED,
asyncJob) < 0) {
if (virGetLastError() == NULL)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to resume domain"));
goto cleanup;
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) {
VIR_WARN("Failed to save status on vm %s", vm->def->name);
goto cleanup;
}
} else {
int detail = (start_paused ? VIR_DOMAIN_EVENT_SUSPENDED_PAUSED :
VIR_DOMAIN_EVENT_SUSPENDED_RESTORED);
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
detail);
qemuDomainEventQueue(driver, event);
}
ret = 0;
cleanup:
virObjectUnref(cookie);
virCommandFree(cmd);
VIR_FREE(errbuf);
if (qemuSecurityRestoreSavedStateLabel(driver->securityManager,
vm->def, path) < 0)
VIR_WARN("failed to restore save state label on %s", path);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainRestoreFlags(virConnectPtr conn,
const char *path,
const char *dxml,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
qemuDomainObjPrivatePtr priv = NULL;
virDomainDefPtr def = NULL;
virDomainObjPtr vm = NULL;
char *xmlout = NULL;
const char *newxml = dxml;
int fd = -1;
int ret = -1;
virQEMUSaveDataPtr data = NULL;
virFileWrapperFdPtr wrapperFd = NULL;
bool hook_taint = false;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
virNWFilterReadLockFilterUpdates();
fd = qemuDomainSaveImageOpen(driver, path, &def, &data,
(flags & VIR_DOMAIN_SAVE_BYPASS_CACHE) != 0,
&wrapperFd, false, false);
if (fd < 0)
goto cleanup;
if (virDomainRestoreFlagsEnsureACL(conn, def) < 0)
goto cleanup;
if (virHookPresent(VIR_HOOK_DRIVER_QEMU)) {
int hookret;
if ((hookret = virHookCall(VIR_HOOK_DRIVER_QEMU, def->name,
VIR_HOOK_QEMU_OP_RESTORE,
VIR_HOOK_SUBOP_BEGIN,
NULL,
dxml ? dxml : data->xml,
&xmlout)) < 0)
goto cleanup;
if (hookret == 0 && !virStringIsEmpty(xmlout)) {
VIR_DEBUG("Using hook-filtered domain XML: %s", xmlout);
hook_taint = true;
newxml = xmlout;
}
}
if (newxml) {
virDomainDefPtr tmp;
if (!(tmp = qemuDomainSaveImageUpdateDef(driver, def, newxml)))
goto cleanup;
virDomainDefFree(def);
def = tmp;
}
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
VIR_DOMAIN_OBJ_LIST_ADD_LIVE |
VIR_DOMAIN_OBJ_LIST_ADD_CHECK_LIVE,
NULL)))
goto cleanup;
virObjectRef(vm);
def = NULL;
if (flags & VIR_DOMAIN_SAVE_RUNNING)
data->header.was_running = 1;
else if (flags & VIR_DOMAIN_SAVE_PAUSED)
data->header.was_running = 0;
if (hook_taint) {
priv = vm->privateData;
priv->hookRun = true;
}
if (qemuProcessBeginJob(driver, vm, VIR_DOMAIN_JOB_OPERATION_RESTORE) < 0)
goto cleanup;
ret = qemuDomainSaveImageStartVM(conn, driver, vm, &fd, data, path,
false, QEMU_ASYNC_JOB_START);
if (virFileWrapperFdClose(wrapperFd) < 0)
VIR_WARN("Failed to close %s", path);
qemuProcessEndJob(driver, vm);
cleanup:
virDomainDefFree(def);
VIR_FORCE_CLOSE(fd);
virQEMUSaveDataFree(data);
VIR_FREE(xmlout);
virFileWrapperFdFree(wrapperFd);
if (vm && ret < 0)
qemuDomainRemoveInactive(driver, vm);
virDomainObjEndAPI(&vm);
virNWFilterUnlockFilterUpdates();
return ret;
}
static int
qemuDomainRestore(virConnectPtr conn,
const char *path)
{
return qemuDomainRestoreFlags(conn, path, NULL, 0);
}
static char *
qemuDomainSaveImageGetXMLDesc(virConnectPtr conn, const char *path,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
char *ret = NULL;
virDomainDefPtr def = NULL;
int fd = -1;
virQEMUSaveDataPtr data = NULL;
/* We only take subset of virDomainDefFormat flags. */
virCheckFlags(VIR_DOMAIN_XML_SECURE, NULL);
fd = qemuDomainSaveImageOpen(driver, path, &def, &data,
false, NULL, false, false);
if (fd < 0)
goto cleanup;
if (virDomainSaveImageGetXMLDescEnsureACL(conn, def, flags) < 0)
goto cleanup;
ret = qemuDomainDefFormatXML(driver, def, flags);
cleanup:
virQEMUSaveDataFree(data);
virDomainDefFree(def);
VIR_FORCE_CLOSE(fd);
return ret;
}
static int
qemuDomainSaveImageDefineXML(virConnectPtr conn, const char *path,
const char *dxml, unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
virDomainDefPtr def = NULL;
virDomainDefPtr newdef = NULL;
int fd = -1;
virQEMUSaveDataPtr data = NULL;
int state = -1;
virCheckFlags(VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
if (flags & VIR_DOMAIN_SAVE_RUNNING)
state = 1;
else if (flags & VIR_DOMAIN_SAVE_PAUSED)
state = 0;
fd = qemuDomainSaveImageOpen(driver, path, &def, &data,
false, NULL, true, false);
if (fd < 0)
goto cleanup;
if (virDomainSaveImageDefineXMLEnsureACL(conn, def) < 0)
goto cleanup;
if (STREQ(data->xml, dxml) &&
(state < 0 || state == data->header.was_running)) {
/* no change to the XML */
ret = 0;
goto cleanup;
}
if (state >= 0)
data->header.was_running = state;
if (!(newdef = qemuDomainSaveImageUpdateDef(driver, def, dxml)))
goto cleanup;
VIR_FREE(data->xml);
if (!(data->xml = qemuDomainDefFormatXML(driver, newdef,
VIR_DOMAIN_XML_INACTIVE |
VIR_DOMAIN_XML_SECURE |
VIR_DOMAIN_XML_MIGRATABLE)))
goto cleanup;
if (lseek(fd, 0, SEEK_SET) != 0) {
virReportSystemError(errno, _("cannot seek in '%s'"), path);
goto cleanup;
}
if (virQEMUSaveDataWrite(data, fd, path) < 0)
goto cleanup;
if (VIR_CLOSE(fd) < 0) {
virReportSystemError(errno, _("failed to write header data to '%s'"), path);
goto cleanup;
}
ret = 0;
cleanup:
virDomainDefFree(def);
virDomainDefFree(newdef);
VIR_FORCE_CLOSE(fd);
virQEMUSaveDataFree(data);
return ret;
}
/* Return 0 on success, 1 if incomplete saved image was silently unlinked,
* and -1 on failure with error raised. */
static int
qemuDomainObjRestore(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *path,
bool start_paused,
bool bypass_cache,
qemuDomainAsyncJob asyncJob)
{
virDomainDefPtr def = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
int fd = -1;
int ret = -1;
char *xmlout = NULL;
virQEMUSaveDataPtr data = NULL;
virFileWrapperFdPtr wrapperFd = NULL;
fd = qemuDomainSaveImageOpen(driver, path, &def, &data,
bypass_cache, &wrapperFd, false, true);
if (fd < 0) {
if (fd == -3)
ret = 1;
goto cleanup;
}
if (virHookPresent(VIR_HOOK_DRIVER_QEMU)) {
int hookret;
if ((hookret = virHookCall(VIR_HOOK_DRIVER_QEMU, def->name,
VIR_HOOK_QEMU_OP_RESTORE,
VIR_HOOK_SUBOP_BEGIN,
NULL, data->xml, &xmlout)) < 0)
goto cleanup;
if (hookret == 0 && !virStringIsEmpty(xmlout)) {
virDomainDefPtr tmp;
VIR_DEBUG("Using hook-filtered domain XML: %s", xmlout);
if (!(tmp = qemuDomainSaveImageUpdateDef(driver, def, xmlout)))
goto cleanup;
virDomainDefFree(def);
def = tmp;
priv->hookRun = true;
}
}
if (STRNEQ(vm->def->name, def->name) ||
memcmp(vm->def->uuid, def->uuid, VIR_UUID_BUFLEN)) {
char vm_uuidstr[VIR_UUID_STRING_BUFLEN];
char def_uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(vm->def->uuid, vm_uuidstr);
virUUIDFormat(def->uuid, def_uuidstr);
virReportError(VIR_ERR_OPERATION_FAILED,
_("cannot restore domain '%s' uuid %s from a file"
" which belongs to domain '%s' uuid %s"),
vm->def->name, vm_uuidstr,
def->name, def_uuidstr);
goto cleanup;
}
virDomainObjAssignDef(vm, def, true, NULL);
def = NULL;
ret = qemuDomainSaveImageStartVM(conn, driver, vm, &fd, data, path,
start_paused, asyncJob);
if (virFileWrapperFdClose(wrapperFd) < 0)
VIR_WARN("Failed to close %s", path);
cleanup:
virQEMUSaveDataFree(data);
VIR_FREE(xmlout);
virDomainDefFree(def);
VIR_FORCE_CLOSE(fd);
virFileWrapperFdFree(wrapperFd);
return ret;
}
static char
*qemuDomainGetXMLDesc(virDomainPtr dom,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
char *ret = NULL;
/* Flags checked by virDomainDefFormat */
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetXMLDescEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainUpdateCurrentMemorySize(driver, vm) < 0)
goto cleanup;
if ((flags & VIR_DOMAIN_XML_MIGRATABLE))
flags |= QEMU_DOMAIN_FORMAT_LIVE_FLAGS;
ret = qemuDomainFormatXML(driver, vm, flags);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static char *qemuConnectDomainXMLFromNative(virConnectPtr conn,
const char *format,
const char *config,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainDefPtr def = NULL;
char *xml = NULL;
virCapsPtr caps = NULL;
virCheckFlags(0, NULL);
if (virConnectDomainXMLFromNativeEnsureACL(conn) < 0)
goto cleanup;
if (STRNEQ(format, QEMU_CONFIG_FORMAT_ARGV)) {
virReportError(VIR_ERR_INVALID_ARG,
_("unsupported config type %s"), format);
goto cleanup;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
def = qemuParseCommandLineString(caps, driver->xmlopt, config,
NULL, NULL, NULL);
if (!def)
goto cleanup;
if (!def->name && VIR_STRDUP(def->name, "unnamed") < 0)
goto cleanup;
xml = qemuDomainDefFormatXML(driver, def, VIR_DOMAIN_XML_INACTIVE);
cleanup:
virDomainDefFree(def);
virObjectUnref(caps);
return xml;
}
static char *qemuConnectDomainXMLToNative(virConnectPtr conn,
const char *format,
const char *xmlData,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainObjPtr vm = NULL;
virCommandPtr cmd = NULL;
char *ret = NULL;
size_t i;
virQEMUDriverConfigPtr cfg;
virCapsPtr caps = NULL;
virCheckFlags(0, NULL);
cfg = virQEMUDriverGetConfig(driver);
if (virConnectDomainXMLToNativeEnsureACL(conn) < 0)
goto cleanup;
if (STRNEQ(format, QEMU_CONFIG_FORMAT_ARGV)) {
virReportError(VIR_ERR_INVALID_ARG,
_("unsupported config type %s"), format);
goto cleanup;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(vm = virDomainObjNew(driver->xmlopt)))
goto cleanup;
if (!(vm->def = virDomainDefParseString(xmlData, caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_ABI_UPDATE)))
goto cleanup;
/* Since we're just exporting args, we can't do bridge/network/direct
* setups, since libvirt will normally create TAP/macvtap devices
* directly. We convert those configs into generic 'ethernet'
* config and assume the user has suitable 'ifup-qemu' scripts
*/
for (i = 0; i < vm->def->nnets; i++) {
virDomainNetDefPtr net = vm->def->nets[i];
unsigned int bootIndex = net->info.bootIndex;
char *model = net->model;
virMacAddr mac = net->mac;
char *script = net->script;
net->model = NULL;
net->script = NULL;
virDomainNetDefClear(net);
net->type = VIR_DOMAIN_NET_TYPE_ETHERNET;
net->info.bootIndex = bootIndex;
net->model = model;
net->mac = mac;
net->script = script;
}
if (!(cmd = qemuProcessCreatePretendCmd(conn, driver, vm, NULL,
qemuCheckFips(), true,
VIR_QEMU_PROCESS_START_COLD)))
goto cleanup;
ret = virCommandToString(cmd);
cleanup:
virCommandFree(cmd);
virObjectUnref(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int qemuConnectListDefinedDomains(virConnectPtr conn,
char **const names, int nnames) {
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
if (virConnectListDefinedDomainsEnsureACL(conn) < 0)
goto cleanup;
ret = virDomainObjListGetInactiveNames(driver->domains, names, nnames,
virConnectListDefinedDomainsCheckACL,
conn);
cleanup:
return ret;
}
static int qemuConnectNumOfDefinedDomains(virConnectPtr conn)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
if (virConnectNumOfDefinedDomainsEnsureACL(conn) < 0)
goto cleanup;
ret = virDomainObjListNumOfDomains(driver->domains, false,
virConnectNumOfDefinedDomainsCheckACL,
conn);
cleanup:
return ret;
}
static int
qemuDomainObjStart(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int flags,
qemuDomainAsyncJob asyncJob)
{
int ret = -1;
char *managed_save;
bool start_paused = (flags & VIR_DOMAIN_START_PAUSED) != 0;
bool autodestroy = (flags & VIR_DOMAIN_START_AUTODESTROY) != 0;
bool bypass_cache = (flags & VIR_DOMAIN_START_BYPASS_CACHE) != 0;
bool force_boot = (flags & VIR_DOMAIN_START_FORCE_BOOT) != 0;
unsigned int start_flags = VIR_QEMU_PROCESS_START_COLD;
qemuDomainObjPrivatePtr priv = vm->privateData;
start_flags |= start_paused ? VIR_QEMU_PROCESS_START_PAUSED : 0;
start_flags |= autodestroy ? VIR_QEMU_PROCESS_START_AUTODESTROY : 0;
/*
* If there is a managed saved state restore it instead of starting
* from scratch. The old state is removed once the restoring succeeded.
*/
managed_save = qemuDomainManagedSavePath(driver, vm);
if (!managed_save)
goto cleanup;
if (virFileExists(managed_save)) {
if (force_boot) {
if (unlink(managed_save) < 0) {
virReportSystemError(errno,
_("cannot remove managed save file %s"),
managed_save);
goto cleanup;
}
vm->hasManagedSave = false;
} else {
virDomainJobOperation op = priv->job.current->operation;
priv->job.current->operation = VIR_DOMAIN_JOB_OPERATION_RESTORE;
ret = qemuDomainObjRestore(conn, driver, vm, managed_save,
start_paused, bypass_cache, asyncJob);
if (ret == 0) {
if (unlink(managed_save) < 0)
VIR_WARN("Failed to remove the managed state %s", managed_save);
else
vm->hasManagedSave = false;
goto cleanup;
} else if (ret < 0) {
VIR_WARN("Unable to restore from managed state %s. "
"Maybe the file is corrupted?", managed_save);
goto cleanup;
} else {
VIR_WARN("Ignoring incomplete managed state %s", managed_save);
priv->job.current->operation = op;
}
}
}
ret = qemuProcessStart(conn, driver, vm, NULL, asyncJob,
NULL, -1, NULL, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE, start_flags);
virDomainAuditStart(vm, "booted", ret >= 0);
if (ret >= 0) {
virObjectEventPtr event =
virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_BOOTED);
if (event) {
qemuDomainEventQueue(driver, event);
if (start_paused) {
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_PAUSED);
qemuDomainEventQueue(driver, event);
}
}
}
cleanup:
VIR_FREE(managed_save);
return ret;
}
static int
qemuDomainCreateWithFlags(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(VIR_DOMAIN_START_PAUSED |
VIR_DOMAIN_START_AUTODESTROY |
VIR_DOMAIN_START_BYPASS_CACHE |
VIR_DOMAIN_START_FORCE_BOOT, -1);
virNWFilterReadLockFilterUpdates();
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainCreateWithFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuProcessBeginJob(driver, vm, VIR_DOMAIN_JOB_OPERATION_START) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is already running"));
goto endjob;
}
if (qemuDomainObjStart(dom->conn, driver, vm, flags,
QEMU_ASYNC_JOB_START) < 0)
goto endjob;
dom->id = vm->def->id;
ret = 0;
endjob:
qemuProcessEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virNWFilterUnlockFilterUpdates();
return ret;
}
static int
qemuDomainCreate(virDomainPtr dom)
{
return qemuDomainCreateWithFlags(dom, 0);
}
static virDomainPtr
qemuDomainDefineXMLFlags(virConnectPtr conn,
const char *xml,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainDefPtr def = NULL;
virDomainDefPtr oldDef = NULL;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
virObjectEventPtr event = NULL;
virQEMUDriverConfigPtr cfg;
virCapsPtr caps = NULL;
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_ABI_UPDATE;
virCheckFlags(VIR_DOMAIN_DEFINE_VALIDATE, NULL);
if (flags & VIR_DOMAIN_DEFINE_VALIDATE)
parse_flags |= VIR_DOMAIN_DEF_PARSE_VALIDATE_SCHEMA;
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(xml, caps, driver->xmlopt,
NULL, parse_flags)))
goto cleanup;
if (virXMLCheckIllegalChars("name", def->name, "\n") < 0)
goto cleanup;
if (virDomainDefineXMLFlagsEnsureACL(conn, def) < 0)
goto cleanup;
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
0, &oldDef)))
goto cleanup;
virObjectRef(vm);
def = NULL;
if (qemuDomainHasBlockjob(vm, true)) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE, "%s",
_("domain has active block job"));
virDomainObjAssignDef(vm, NULL, false, NULL);
goto cleanup;
}
vm->persistent = 1;
if (virDomainSaveConfig(cfg->configDir, driver->caps,
vm->newDef ? vm->newDef : vm->def) < 0) {
if (oldDef) {
/* There is backup so this VM was defined before.
* Just restore the backup. */
VIR_INFO("Restoring domain '%s' definition", vm->def->name);
if (virDomainObjIsActive(vm))
vm->newDef = oldDef;
else
vm->def = oldDef;
oldDef = NULL;
} else {
/* Brand new domain. Remove it */
VIR_INFO("Deleting domain '%s'", vm->def->name);
vm->persistent = 0;
qemuDomainRemoveInactive(driver, vm);
}
goto cleanup;
}
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
!oldDef ?
VIR_DOMAIN_EVENT_DEFINED_ADDED :
VIR_DOMAIN_EVENT_DEFINED_UPDATED);
VIR_INFO("Creating domain '%s'", vm->def->name);
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
cleanup:
virDomainDefFree(oldDef);
virDomainDefFree(def);
virDomainObjEndAPI(&vm);
qemuDomainEventQueue(driver, event);
virObjectUnref(caps);
virObjectUnref(cfg);
return dom;
}
static virDomainPtr
qemuDomainDefineXML(virConnectPtr conn, const char *xml)
{
return qemuDomainDefineXMLFlags(conn, xml, 0);
}
static int
qemuDomainUndefineFlags(virDomainPtr dom,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virObjectEventPtr event = NULL;
char *name = NULL;
int ret = -1;
int nsnapshots;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE |
VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA |
VIR_DOMAIN_UNDEFINE_NVRAM |
VIR_DOMAIN_UNDEFINE_KEEP_NVRAM, -1);
if ((flags & VIR_DOMAIN_UNDEFINE_NVRAM) &&
(flags & VIR_DOMAIN_UNDEFINE_KEEP_NVRAM)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot both keep and delete nvram"));
return -1;
}
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainUndefineFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot undefine transient domain"));
goto cleanup;
}
if (!virDomainObjIsActive(vm) &&
(nsnapshots = virDomainSnapshotObjListNum(vm->snapshots, NULL, 0))) {
if (!(flags & VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA)) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("cannot delete inactive domain with %d "
"snapshots"),
nsnapshots);
goto cleanup;
}
if (qemuDomainSnapshotDiscardAllMetadata(driver, vm) < 0)
goto cleanup;
}
name = qemuDomainManagedSavePath(driver, vm);
if (name == NULL)
goto cleanup;
if (virFileExists(name)) {
if (flags & VIR_DOMAIN_UNDEFINE_MANAGED_SAVE) {
if (unlink(name) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to remove domain managed "
"save image"));
goto cleanup;
}
} else {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Refusing to undefine while domain managed "
"save image exists"));
goto cleanup;
}
}
if (!virDomainObjIsActive(vm) &&
vm->def->os.loader && vm->def->os.loader->nvram &&
virFileExists(vm->def->os.loader->nvram)) {
if ((flags & VIR_DOMAIN_UNDEFINE_NVRAM)) {
if (unlink(vm->def->os.loader->nvram) < 0) {
virReportSystemError(errno,
_("failed to remove nvram: %s"),
vm->def->os.loader->nvram);
goto cleanup;
}
} else if (!(flags & VIR_DOMAIN_UNDEFINE_KEEP_NVRAM)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot delete inactive domain with nvram"));
goto cleanup;
}
}
if (virDomainDeleteConfig(cfg->configDir, cfg->autostartDir, vm) < 0)
goto cleanup;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_UNDEFINED,
VIR_DOMAIN_EVENT_UNDEFINED_REMOVED);
VIR_INFO("Undefining domain '%s'", vm->def->name);
/* If the domain is active, keep it running but set it as transient.
* domainDestroy and domainShutdown will take care of removing the
* domain obj from the hash table.
*/
vm->persistent = 0;
if (!virDomainObjIsActive(vm))
qemuDomainRemoveInactive(driver, vm);
ret = 0;
cleanup:
VIR_FREE(name);
virDomainObjEndAPI(&vm);
qemuDomainEventQueue(driver, event);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainUndefine(virDomainPtr dom)
{
return qemuDomainUndefineFlags(dom, 0);
}
static int
qemuDomainAttachDeviceLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virConnectPtr conn,
virQEMUDriverPtr driver)
{
int ret = -1;
const char *alias = NULL;
switch ((virDomainDeviceType) dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
qemuDomainObjCheckDiskTaint(driver, vm, dev->data.disk, NULL);
ret = qemuDomainAttachDeviceDiskLive(conn, driver, vm, dev);
if (!ret) {
alias = dev->data.disk->info.alias;
dev->data.disk = NULL;
}
break;
case VIR_DOMAIN_DEVICE_CONTROLLER:
ret = qemuDomainAttachControllerDevice(driver, vm, dev->data.controller);
if (!ret) {
alias = dev->data.controller->info.alias;
dev->data.controller = NULL;
}
break;
case VIR_DOMAIN_DEVICE_LEASE:
ret = qemuDomainAttachLease(driver, vm,
dev->data.lease);
if (ret == 0)
dev->data.lease = NULL;
break;
case VIR_DOMAIN_DEVICE_NET:
qemuDomainObjCheckNetTaint(driver, vm, dev->data.net, NULL);
ret = qemuDomainAttachNetDevice(driver, vm, dev->data.net);
if (!ret) {
alias = dev->data.net->info.alias;
dev->data.net = NULL;
}
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
qemuDomainObjCheckHostdevTaint(driver, vm, dev->data.hostdev, NULL);
ret = qemuDomainAttachHostDevice(conn, driver, vm,
dev->data.hostdev);
if (!ret) {
alias = dev->data.hostdev->info->alias;
dev->data.hostdev = NULL;
}
break;
case VIR_DOMAIN_DEVICE_REDIRDEV:
ret = qemuDomainAttachRedirdevDevice(conn, driver, vm,
dev->data.redirdev);
if (!ret) {
alias = dev->data.redirdev->info.alias;
dev->data.redirdev = NULL;
}
break;
case VIR_DOMAIN_DEVICE_CHR:
ret = qemuDomainAttachChrDevice(conn, driver, vm,
dev->data.chr);
if (!ret) {
alias = dev->data.chr->info.alias;
dev->data.chr = NULL;
}
break;
case VIR_DOMAIN_DEVICE_RNG:
ret = qemuDomainAttachRNGDevice(conn, driver, vm,
dev->data.rng);
if (!ret) {
alias = dev->data.rng->info.alias;
dev->data.rng = NULL;
}
break;
case VIR_DOMAIN_DEVICE_MEMORY:
/* note that qemuDomainAttachMemory always consumes dev->data.memory
* and dispatches DeviceAdded event on success */
ret = qemuDomainAttachMemory(driver, vm,
dev->data.memory);
dev->data.memory = NULL;
break;
case VIR_DOMAIN_DEVICE_SHMEM:
ret = qemuDomainAttachShmemDevice(driver, vm,
dev->data.shmem);
if (!ret) {
alias = dev->data.shmem->info.alias;
dev->data.shmem = NULL;
}
break;
case VIR_DOMAIN_DEVICE_NONE:
case VIR_DOMAIN_DEVICE_FS:
case VIR_DOMAIN_DEVICE_INPUT:
case VIR_DOMAIN_DEVICE_SOUND:
case VIR_DOMAIN_DEVICE_VIDEO:
case VIR_DOMAIN_DEVICE_WATCHDOG:
case VIR_DOMAIN_DEVICE_GRAPHICS:
case VIR_DOMAIN_DEVICE_HUB:
case VIR_DOMAIN_DEVICE_SMARTCARD:
case VIR_DOMAIN_DEVICE_MEMBALLOON:
case VIR_DOMAIN_DEVICE_NVRAM:
case VIR_DOMAIN_DEVICE_TPM:
case VIR_DOMAIN_DEVICE_PANIC:
case VIR_DOMAIN_DEVICE_IOMMU:
case VIR_DOMAIN_DEVICE_LAST:
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("live attach of device '%s' is not supported"),
virDomainDeviceTypeToString(dev->type));
break;
}
if (alias) {
/* queue the event before the alias has a chance to get freed
* if the domain disappears while qemuDomainUpdateDeviceList
* is in monitor */
virObjectEventPtr event;
event = virDomainEventDeviceAddedNewFromObj(vm, alias);
qemuDomainEventQueue(driver, event);
}
if (ret == 0)
ret = qemuDomainUpdateDeviceList(driver, vm, QEMU_ASYNC_JOB_NONE);
return ret;
}
static int
qemuDomainDetachDeviceControllerLive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virDomainControllerDefPtr cont = dev->data.controller;
int ret = -1;
switch (cont->type) {
case VIR_DOMAIN_CONTROLLER_TYPE_SCSI:
ret = qemuDomainDetachControllerDevice(driver, vm, dev);
break;
default :
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("'%s' controller cannot be hot unplugged."),
virDomainControllerTypeToString(cont->type));
}
return ret;
}
static int
qemuDomainDetachDeviceLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virQEMUDriverPtr driver)
{
int ret = -1;
switch ((virDomainDeviceType) dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
ret = qemuDomainDetachDeviceDiskLive(driver, vm, dev);
break;
case VIR_DOMAIN_DEVICE_CONTROLLER:
ret = qemuDomainDetachDeviceControllerLive(driver, vm, dev);
break;
case VIR_DOMAIN_DEVICE_LEASE:
ret = qemuDomainDetachLease(driver, vm, dev->data.lease);
break;
case VIR_DOMAIN_DEVICE_NET:
ret = qemuDomainDetachNetDevice(driver, vm, dev);
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
ret = qemuDomainDetachHostDevice(driver, vm, dev);
break;
case VIR_DOMAIN_DEVICE_CHR:
ret = qemuDomainDetachChrDevice(driver, vm, dev->data.chr);
break;
case VIR_DOMAIN_DEVICE_RNG:
ret = qemuDomainDetachRNGDevice(driver, vm, dev->data.rng);
break;
case VIR_DOMAIN_DEVICE_MEMORY:
ret = qemuDomainDetachMemoryDevice(driver, vm, dev->data.memory);
break;
case VIR_DOMAIN_DEVICE_SHMEM:
ret = qemuDomainDetachShmemDevice(driver, vm, dev->data.shmem);
break;
case VIR_DOMAIN_DEVICE_FS:
case VIR_DOMAIN_DEVICE_INPUT:
case VIR_DOMAIN_DEVICE_SOUND:
case VIR_DOMAIN_DEVICE_VIDEO:
case VIR_DOMAIN_DEVICE_WATCHDOG:
case VIR_DOMAIN_DEVICE_GRAPHICS:
case VIR_DOMAIN_DEVICE_HUB:
case VIR_DOMAIN_DEVICE_SMARTCARD:
case VIR_DOMAIN_DEVICE_MEMBALLOON:
case VIR_DOMAIN_DEVICE_NVRAM:
case VIR_DOMAIN_DEVICE_REDIRDEV:
case VIR_DOMAIN_DEVICE_NONE:
case VIR_DOMAIN_DEVICE_TPM:
case VIR_DOMAIN_DEVICE_PANIC:
case VIR_DOMAIN_DEVICE_IOMMU:
case VIR_DOMAIN_DEVICE_LAST:
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("live detach of device '%s' is not supported"),
virDomainDeviceTypeToString(dev->type));
break;
}
if (ret == 0)
ret = qemuDomainUpdateDeviceList(driver, vm, QEMU_ASYNC_JOB_NONE);
return ret;
}
static int
qemuDomainChangeDiskLive(virConnectPtr conn,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virQEMUDriverPtr driver,
bool force)
{
virDomainDiskDefPtr disk = dev->data.disk;
virDomainDiskDefPtr orig_disk = NULL;
int ret = -1;
if (virStorageTranslateDiskSourcePool(conn, disk) < 0)
goto cleanup;
if (qemuDomainDetermineDiskChain(driver, vm, disk, false, true) < 0)
goto cleanup;
if (!(orig_disk = virDomainDiskFindByBusAndDst(vm->def,
disk->bus, disk->dst))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("No device with bus '%s' and target '%s'"),
virDomainDiskBusTypeToString(disk->bus),
disk->dst);
goto cleanup;
}
if (!qemuDomainDiskChangeSupported(disk, orig_disk))
goto cleanup;
if (qemuDomainDiskSourceDiffers(disk, orig_disk)) {
/* Disk source can be changed only for removable devices */
if (disk->device != VIR_DOMAIN_DISK_DEVICE_CDROM &&
disk->device != VIR_DOMAIN_DISK_DEVICE_FLOPPY) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("disk source can be changed only in removable "
"drives"));
goto cleanup;
}
/* Add the new disk src into shared disk hash table */
if (qemuAddSharedDevice(driver, dev, vm->def->name) < 0)
goto cleanup;
if (qemuDomainChangeEjectableMedia(driver, vm, orig_disk,
dev->data.disk->src, force) < 0) {
ignore_value(qemuRemoveSharedDisk(driver, dev->data.disk,
vm->def->name));
goto cleanup;
}
dev->data.disk->src = NULL;
}
orig_disk->startupPolicy = dev->data.disk->startupPolicy;
orig_disk->snapshot = dev->data.disk->snapshot;
ret = 0;
cleanup:
return ret;
}
static int
qemuDomainUpdateDeviceLive(virConnectPtr conn,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virDomainPtr dom,
bool force)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int ret = -1;
switch ((virDomainDeviceType) dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
qemuDomainObjCheckDiskTaint(driver, vm, dev->data.disk, NULL);
ret = qemuDomainChangeDiskLive(conn, vm, dev, driver, force);
break;
case VIR_DOMAIN_DEVICE_GRAPHICS:
ret = qemuDomainChangeGraphics(driver, vm, dev->data.graphics);
break;
case VIR_DOMAIN_DEVICE_NET:
ret = qemuDomainChangeNet(driver, vm, dev);
break;
case VIR_DOMAIN_DEVICE_FS:
case VIR_DOMAIN_DEVICE_INPUT:
case VIR_DOMAIN_DEVICE_SOUND:
case VIR_DOMAIN_DEVICE_VIDEO:
case VIR_DOMAIN_DEVICE_WATCHDOG:
case VIR_DOMAIN_DEVICE_HUB:
case VIR_DOMAIN_DEVICE_SMARTCARD:
case VIR_DOMAIN_DEVICE_MEMBALLOON:
case VIR_DOMAIN_DEVICE_NVRAM:
case VIR_DOMAIN_DEVICE_RNG:
case VIR_DOMAIN_DEVICE_SHMEM:
case VIR_DOMAIN_DEVICE_LEASE:
case VIR_DOMAIN_DEVICE_HOSTDEV:
case VIR_DOMAIN_DEVICE_CONTROLLER:
case VIR_DOMAIN_DEVICE_REDIRDEV:
case VIR_DOMAIN_DEVICE_MEMORY:
case VIR_DOMAIN_DEVICE_CHR:
case VIR_DOMAIN_DEVICE_NONE:
case VIR_DOMAIN_DEVICE_TPM:
case VIR_DOMAIN_DEVICE_PANIC:
case VIR_DOMAIN_DEVICE_IOMMU:
case VIR_DOMAIN_DEVICE_LAST:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("live update of device '%s' is not supported"),
virDomainDeviceTypeToString(dev->type));
break;
}
return ret;
}
static int
qemuDomainAttachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev,
virConnectPtr conn,
virCapsPtr caps,
unsigned int parse_flags,
virDomainXMLOptionPtr xmlopt)
{
virDomainDiskDefPtr disk;
virDomainNetDefPtr net;
virDomainHostdevDefPtr hostdev;
virDomainLeaseDefPtr lease;
virDomainControllerDefPtr controller;
virDomainFSDefPtr fs;
virDomainRedirdevDefPtr redirdev;
virDomainShmemDefPtr shmem;
switch ((virDomainDeviceType) dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
disk = dev->data.disk;
if (virDomainDiskIndexByName(vmdef, disk->dst, true) >= 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("target %s already exists"), disk->dst);
return -1;
}
if (virStorageTranslateDiskSourcePool(conn, disk) < 0)
return -1;
if (qemuCheckDiskConfig(disk) < 0)
return -1;
if (virDomainDiskInsert(vmdef, disk))
return -1;
/* vmdef has the pointer. Generic codes for vmdef will do all jobs */
dev->data.disk = NULL;
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if (virDomainNetInsert(vmdef, net))
return -1;
dev->data.net = NULL;
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
hostdev = dev->data.hostdev;
if (virDomainHostdevFind(vmdef, hostdev, NULL) >= 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("device is already in the domain configuration"));
return -1;
}
if (virDomainHostdevInsert(vmdef, hostdev))
return -1;
dev->data.hostdev = NULL;
break;
case VIR_DOMAIN_DEVICE_LEASE:
lease = dev->data.lease;
if (virDomainLeaseIndex(vmdef, lease) >= 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("Lease %s in lockspace %s already exists"),
lease->key, NULLSTR(lease->lockspace));
return -1;
}
if (virDomainLeaseInsert(vmdef, lease) < 0)
return -1;
/* vmdef has the pointer. Generic codes for vmdef will do all jobs */
dev->data.lease = NULL;
break;
case VIR_DOMAIN_DEVICE_CONTROLLER:
controller = dev->data.controller;
if (controller->idx != -1 &&
virDomainControllerFind(vmdef, controller->type,
controller->idx) >= 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Target already exists"));
return -1;
}
if (virDomainControllerInsert(vmdef, controller) < 0)
return -1;
dev->data.controller = NULL;
break;
case VIR_DOMAIN_DEVICE_CHR:
if (qemuDomainChrInsert(vmdef, dev->data.chr) < 0)
return -1;
dev->data.chr = NULL;
break;
case VIR_DOMAIN_DEVICE_FS:
fs = dev->data.fs;
if (virDomainFSIndexByName(vmdef, fs->dst) >= 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("Target already exists"));
return -1;
}
if (virDomainFSInsert(vmdef, fs) < 0)
return -1;
dev->data.fs = NULL;
break;
case VIR_DOMAIN_DEVICE_RNG:
if (dev->data.rng->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE &&
virDomainDefHasDeviceAddress(vmdef, &dev->data.rng->info)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("a device with the same address already exists "));
return -1;
}
if (VIR_APPEND_ELEMENT(vmdef->rngs, vmdef->nrngs, dev->data.rng) < 0)
return -1;
dev->data.rng = NULL;
break;
case VIR_DOMAIN_DEVICE_MEMORY:
if (vmdef->nmems == vmdef->mem.memory_slots) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("no free memory device slot available"));
return -1;
}
vmdef->mem.cur_balloon += dev->data.memory->size;
if (virDomainMemoryInsert(vmdef, dev->data.memory) < 0)
return -1;
dev->data.memory = NULL;
break;
case VIR_DOMAIN_DEVICE_REDIRDEV:
redirdev = dev->data.redirdev;
if (VIR_APPEND_ELEMENT(vmdef->redirdevs, vmdef->nredirdevs, redirdev) < 0)
return -1;
dev->data.redirdev = NULL;
break;
case VIR_DOMAIN_DEVICE_SHMEM:
shmem = dev->data.shmem;
if (virDomainShmemDefFind(vmdef, shmem) >= 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("device is already in the domain configuration"));
return -1;
}
if (virDomainShmemDefInsert(vmdef, shmem) < 0)
return -1;
dev->data.shmem = NULL;
break;
case VIR_DOMAIN_DEVICE_INPUT:
case VIR_DOMAIN_DEVICE_SOUND:
case VIR_DOMAIN_DEVICE_VIDEO:
case VIR_DOMAIN_DEVICE_WATCHDOG:
case VIR_DOMAIN_DEVICE_GRAPHICS:
case VIR_DOMAIN_DEVICE_HUB:
case VIR_DOMAIN_DEVICE_SMARTCARD:
case VIR_DOMAIN_DEVICE_MEMBALLOON:
case VIR_DOMAIN_DEVICE_NVRAM:
case VIR_DOMAIN_DEVICE_NONE:
case VIR_DOMAIN_DEVICE_TPM:
case VIR_DOMAIN_DEVICE_PANIC:
case VIR_DOMAIN_DEVICE_IOMMU:
case VIR_DOMAIN_DEVICE_LAST:
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("persistent attach of device '%s' is not supported"),
virDomainDeviceTypeToString(dev->type));
return -1;
}
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, NULL) < 0)
return -1;
return 0;
}
static int
qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev,
virCapsPtr caps,
unsigned int parse_flags,
virDomainXMLOptionPtr xmlopt)
{
virDomainDiskDefPtr disk, det_disk;
virDomainNetDefPtr net;
virDomainHostdevDefPtr hostdev, det_hostdev;
virDomainLeaseDefPtr lease, det_lease;
virDomainControllerDefPtr cont, det_cont;
virDomainChrDefPtr chr;
virDomainFSDefPtr fs;
virDomainMemoryDefPtr mem;
int idx;
switch ((virDomainDeviceType) dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
disk = dev->data.disk;
if (!(det_disk = virDomainDiskRemoveByName(vmdef, disk->dst))) {
virReportError(VIR_ERR_INVALID_ARG,
_("no target device %s"), disk->dst);
return -1;
}
virDomainDiskDefFree(det_disk);
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if ((idx = virDomainNetFindIdx(vmdef, net)) < 0)
return -1;
/* this is guaranteed to succeed */
virDomainNetDefFree(virDomainNetRemove(vmdef, idx));
break;
case VIR_DOMAIN_DEVICE_HOSTDEV: {
hostdev = dev->data.hostdev;
if ((idx = virDomainHostdevFind(vmdef, hostdev, &det_hostdev)) < 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("device not present in domain configuration"));
return -1;
}
virDomainHostdevRemove(vmdef, idx);
virDomainHostdevDefFree(det_hostdev);
break;
}
case VIR_DOMAIN_DEVICE_LEASE:
lease = dev->data.lease;
if (!(det_lease = virDomainLeaseRemove(vmdef, lease))) {
virReportError(VIR_ERR_INVALID_ARG,
_("Lease %s in lockspace %s does not exist"),
lease->key, NULLSTR(lease->lockspace));
return -1;
}
virDomainLeaseDefFree(det_lease);
break;
case VIR_DOMAIN_DEVICE_CONTROLLER:
cont = dev->data.controller;
if ((idx = virDomainControllerFind(vmdef, cont->type,
cont->idx)) < 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("device not present in domain configuration"));
return -1;
}
det_cont = virDomainControllerRemove(vmdef, idx);
virDomainControllerDefFree(det_cont);
break;
case VIR_DOMAIN_DEVICE_CHR:
if (!(chr = qemuDomainChrRemove(vmdef, dev->data.chr)))
return -1;
virDomainChrDefFree(chr);
virDomainChrDefFree(dev->data.chr);
dev->data.chr = NULL;
break;
case VIR_DOMAIN_DEVICE_FS:
fs = dev->data.fs;
idx = virDomainFSIndexByName(vmdef, fs->dst);
if (idx < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("no matching filesystem device was found"));
return -1;
}
fs = virDomainFSRemove(vmdef, idx);
virDomainFSDefFree(fs);
break;
case VIR_DOMAIN_DEVICE_RNG:
if ((idx = virDomainRNGFind(vmdef, dev->data.rng)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("no matching RNG device was found"));
return -1;
}
virDomainRNGDefFree(virDomainRNGRemove(vmdef, idx));
break;
case VIR_DOMAIN_DEVICE_MEMORY:
if ((idx = virDomainMemoryFindInactiveByDef(vmdef,
dev->data.memory)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("matching memory device was not found"));
return -1;
}
mem = virDomainMemoryRemove(vmdef, idx);
vmdef->mem.cur_balloon -= mem->size;
virDomainMemoryDefFree(mem);
break;
case VIR_DOMAIN_DEVICE_REDIRDEV:
if ((idx = virDomainRedirdevDefFind(vmdef,
dev->data.redirdev)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("no matching redirdev was not found"));
return -1;
}
virDomainRedirdevDefFree(virDomainRedirdevDefRemove(vmdef, idx));
break;
case VIR_DOMAIN_DEVICE_SHMEM:
if ((idx = virDomainShmemDefFind(vmdef, dev->data.shmem)) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("matching shmem device was not found"));
return -1;
}
virDomainShmemDefFree(virDomainShmemDefRemove(vmdef, idx));
break;
case VIR_DOMAIN_DEVICE_INPUT:
case VIR_DOMAIN_DEVICE_SOUND:
case VIR_DOMAIN_DEVICE_VIDEO:
case VIR_DOMAIN_DEVICE_WATCHDOG:
case VIR_DOMAIN_DEVICE_GRAPHICS:
case VIR_DOMAIN_DEVICE_HUB:
case VIR_DOMAIN_DEVICE_SMARTCARD:
case VIR_DOMAIN_DEVICE_MEMBALLOON:
case VIR_DOMAIN_DEVICE_NVRAM:
case VIR_DOMAIN_DEVICE_NONE:
case VIR_DOMAIN_DEVICE_TPM:
case VIR_DOMAIN_DEVICE_PANIC:
case VIR_DOMAIN_DEVICE_IOMMU:
case VIR_DOMAIN_DEVICE_LAST:
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("persistent detach of device '%s' is not supported"),
virDomainDeviceTypeToString(dev->type));
return -1;
}
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, NULL) < 0)
return -1;
return 0;
}
static int
qemuDomainUpdateDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev,
virCapsPtr caps,
unsigned int parse_flags,
virDomainXMLOptionPtr xmlopt)
{
virDomainDiskDefPtr newDisk;
virDomainGraphicsDefPtr newGraphics;
virDomainNetDefPtr net;
int pos;
switch ((virDomainDeviceType) dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
newDisk = dev->data.disk;
if ((pos = virDomainDiskIndexByName(vmdef, newDisk->dst, false)) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("target %s doesn't exist."), newDisk->dst);
return -1;
}
virDomainDiskDefFree(vmdef->disks[pos]);
vmdef->disks[pos] = newDisk;
dev->data.disk = NULL;
break;
case VIR_DOMAIN_DEVICE_GRAPHICS:
newGraphics = dev->data.graphics;
pos = qemuDomainFindGraphicsIndex(vmdef, newGraphics);
if (pos < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot find existing graphics type '%s' device to modify"),
virDomainGraphicsTypeToString(newGraphics->type));
return -1;
}
virDomainGraphicsDefFree(vmdef->graphics[pos]);
vmdef->graphics[pos] = newGraphics;
dev->data.graphics = NULL;
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if ((pos = virDomainNetFindIdx(vmdef, net)) < 0)
return -1;
virDomainNetDefFree(vmdef->nets[pos]);
vmdef->nets[pos] = net;
dev->data.net = NULL;
break;
case VIR_DOMAIN_DEVICE_FS:
case VIR_DOMAIN_DEVICE_INPUT:
case VIR_DOMAIN_DEVICE_SOUND:
case VIR_DOMAIN_DEVICE_VIDEO:
case VIR_DOMAIN_DEVICE_WATCHDOG:
case VIR_DOMAIN_DEVICE_HUB:
case VIR_DOMAIN_DEVICE_SMARTCARD:
case VIR_DOMAIN_DEVICE_MEMBALLOON:
case VIR_DOMAIN_DEVICE_NVRAM:
case VIR_DOMAIN_DEVICE_RNG:
case VIR_DOMAIN_DEVICE_SHMEM:
case VIR_DOMAIN_DEVICE_LEASE:
case VIR_DOMAIN_DEVICE_HOSTDEV:
case VIR_DOMAIN_DEVICE_CONTROLLER:
case VIR_DOMAIN_DEVICE_REDIRDEV:
case VIR_DOMAIN_DEVICE_CHR:
case VIR_DOMAIN_DEVICE_MEMORY:
case VIR_DOMAIN_DEVICE_NONE:
case VIR_DOMAIN_DEVICE_TPM:
case VIR_DOMAIN_DEVICE_PANIC:
case VIR_DOMAIN_DEVICE_IOMMU:
case VIR_DOMAIN_DEVICE_LAST:
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("persistent update of device '%s' is not supported"),
virDomainDeviceTypeToString(dev->type));
return -1;
}
if (virDomainDefPostParse(vmdef, caps, parse_flags, xmlopt, NULL) < 0)
return -1;
return 0;
}
static int
qemuDomainAttachDeviceLiveAndConfig(virConnectPtr conn,
virDomainObjPtr vm,
virQEMUDriverPtr driver,
const char *xml,
unsigned int flags)
{
virDomainDefPtr vmdef = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virDomainDeviceDefPtr dev = NULL, dev_copy = NULL;
int ret = -1;
virCapsPtr caps = NULL;
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_ABI_UPDATE;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
caps, driver->xmlopt,
parse_flags);
if (dev == NULL)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG &&
flags & VIR_DOMAIN_AFFECT_LIVE) {
/* If we are affecting both CONFIG and LIVE
* create a deep copy of device as adding
* to CONFIG takes one instance.
*/
dev_copy = virDomainDeviceDefCopy(dev, vm->def, caps, driver->xmlopt);
if (!dev_copy)
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt);
if (!vmdef)
goto cleanup;
if (virDomainDefCompatibleDevice(vmdef, dev,
VIR_DOMAIN_DEVICE_ACTION_ATTACH) < 0)
goto cleanup;
if ((ret = qemuDomainAttachDeviceConfig(vmdef, dev, conn, caps,
parse_flags,
driver->xmlopt)) < 0)
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (virDomainDefCompatibleDevice(vm->def, dev_copy,
VIR_DOMAIN_DEVICE_ACTION_ATTACH) < 0)
goto cleanup;
if ((ret = qemuDomainAttachDeviceLive(vm, dev_copy, conn, driver)) < 0)
goto cleanup;
/*
* update domain status forcibly because the domain status may be
* changed even if we failed to attach the device. For example,
* a new controller may be created.
*/
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) {
ret = -1;
goto cleanup;
}
}
/* Finally, if no error until here, we can save config. */
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
ret = virDomainSaveConfig(cfg->configDir, driver->caps, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
}
cleanup:
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
virObjectUnref(cfg);
virObjectUnref(caps);
return ret;
}
static int
qemuDomainAttachDeviceFlags(virDomainPtr dom,
const char *xml,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
virNWFilterReadLockFilterUpdates();
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainAttachDeviceFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
goto endjob;
if (qemuDomainAttachDeviceLiveAndConfig(dom->conn, vm, driver, xml, flags) < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virNWFilterUnlockFilterUpdates();
return ret;
}
static int qemuDomainAttachDevice(virDomainPtr dom, const char *xml)
{
return qemuDomainAttachDeviceFlags(dom, xml,
VIR_DOMAIN_AFFECT_LIVE);
}
static int qemuDomainUpdateDeviceFlags(virDomainPtr dom,
const char *xml,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr vmdef = NULL;
virDomainDeviceDefPtr dev = NULL, dev_copy = NULL;
bool force = (flags & VIR_DOMAIN_DEVICE_MODIFY_FORCE) != 0;
int ret = -1;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_INACTIVE;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_DEVICE_MODIFY_FORCE, -1);
virNWFilterReadLockFilterUpdates();
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainUpdateDeviceFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
caps, driver->xmlopt,
parse_flags);
if (dev == NULL)
goto endjob;
if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
goto endjob;
if (flags & VIR_DOMAIN_AFFECT_CONFIG &&
flags & VIR_DOMAIN_AFFECT_LIVE) {
/* If we are affecting both CONFIG and LIVE
* create a deep copy of device as adding
* to CONFIG takes one instance.
*/
dev_copy = virDomainDeviceDefCopy(dev, vm->def, caps, driver->xmlopt);
if (!dev_copy)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt);
if (!vmdef)
goto endjob;
if (virDomainDefCompatibleDevice(vmdef, dev,
VIR_DOMAIN_DEVICE_ACTION_UPDATE) < 0)
goto endjob;
if ((ret = qemuDomainUpdateDeviceConfig(vmdef, dev, caps,
parse_flags,
driver->xmlopt)) < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (virDomainDefCompatibleDevice(vm->def, dev_copy,
VIR_DOMAIN_DEVICE_ACTION_UPDATE) < 0)
goto endjob;
if ((ret = qemuDomainUpdateDeviceLive(dom->conn, vm, dev_copy, dom, force)) < 0)
goto endjob;
/*
* update domain status forcibly because the domain status may be
* changed even if we failed to attach the device. For example,
* a new controller may be created.
*/
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) {
ret = -1;
goto endjob;
}
}
/* Finally, if no error until here, we can save config. */
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
ret = virDomainSaveConfig(cfg->configDir, driver->caps, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
}
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
virDomainObjEndAPI(&vm);
virObjectUnref(caps);
virObjectUnref(cfg);
virNWFilterUnlockFilterUpdates();
return ret;
}
static int
qemuDomainDetachDeviceLiveAndConfig(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *xml,
unsigned int flags)
{
virCapsPtr caps = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virDomainDeviceDefPtr dev = NULL, dev_copy = NULL;
unsigned int parse_flags = VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE;
virDomainDefPtr vmdef = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
if ((flags & VIR_DOMAIN_AFFECT_CONFIG) &&
!(flags & VIR_DOMAIN_AFFECT_LIVE))
parse_flags |= VIR_DOMAIN_DEF_PARSE_INACTIVE;
dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
caps, driver->xmlopt,
parse_flags);
if (dev == NULL)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG &&
flags & VIR_DOMAIN_AFFECT_LIVE) {
/* If we are affecting both CONFIG and LIVE
* create a deep copy of device as adding
* to CONFIG takes one instance.
*/
dev_copy = virDomainDeviceDefCopy(dev, vm->def, caps, driver->xmlopt);
if (!dev_copy)
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt);
if (!vmdef)
goto cleanup;
if (virDomainDefCompatibleDevice(vmdef, dev,
VIR_DOMAIN_DEVICE_ACTION_DETACH) < 0)
goto cleanup;
if ((ret = qemuDomainDetachDeviceConfig(vmdef, dev, caps,
parse_flags,
driver->xmlopt)) < 0)
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (virDomainDefCompatibleDevice(vm->def, dev_copy,
VIR_DOMAIN_DEVICE_ACTION_DETACH) < 0)
goto cleanup;
if ((ret = qemuDomainDetachDeviceLive(vm, dev_copy, driver)) < 0)
goto cleanup;
/*
* update domain status forcibly because the domain status may be
* changed even if we failed to attach the device. For example,
* a new controller may be created.
*/
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) {
ret = -1;
goto cleanup;
}
}
/* Finally, if no error until here, we can save config. */
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
ret = virDomainSaveConfig(cfg->configDir, driver->caps, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
}
cleanup:
virObjectUnref(caps);
virObjectUnref(cfg);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
virDomainDefFree(vmdef);
return ret;
}
static int
qemuDomainDetachDeviceFlags(virDomainPtr dom,
const char *xml,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainDetachDeviceFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
goto endjob;
if (qemuDomainDetachDeviceLiveAndConfig(driver, vm, xml, flags) < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDomainDetachDevice(virDomainPtr dom, const char *xml)
{
return qemuDomainDetachDeviceFlags(dom, xml,
VIR_DOMAIN_AFFECT_LIVE);
}
static int qemuDomainGetAutostart(virDomainPtr dom,
int *autostart)
{
virDomainObjPtr vm;
int ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetAutostartEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
*autostart = vm->autostart;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDomainSetAutostart(virDomainPtr dom,
int autostart)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
char *configFile = NULL, *autostartLink = NULL;
int ret = -1;
virQEMUDriverConfigPtr cfg = NULL;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetAutostartEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot set autostart for transient domain"));
goto cleanup;
}
autostart = (autostart != 0);
if (vm->autostart != autostart) {
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!(configFile = virDomainConfigFile(cfg->configDir, vm->def->name)))
goto endjob;
if (!(autostartLink = virDomainConfigFile(cfg->autostartDir,
vm->def->name)))
goto endjob;
if (autostart) {
if (virFileMakePath(cfg->autostartDir) < 0) {
virReportSystemError(errno,
_("cannot create autostart directory %s"),
cfg->autostartDir);
goto endjob;
}
if (symlink(configFile, autostartLink) < 0) {
virReportSystemError(errno,
_("Failed to create symlink '%s to '%s'"),
autostartLink, configFile);
goto endjob;
}
} else {
if (unlink(autostartLink) < 0 &&
errno != ENOENT &&
errno != ENOTDIR) {
virReportSystemError(errno,
_("Failed to delete symlink '%s'"),
autostartLink);
goto endjob;
}
}
vm->autostart = autostart;
endjob:
qemuDomainObjEndJob(driver, vm);
}
ret = 0;
cleanup:
VIR_FREE(configFile);
VIR_FREE(autostartLink);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static char *qemuDomainGetSchedulerType(virDomainPtr dom,
int *nparams)
{
char *ret = NULL;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
virQEMUDriverPtr driver = dom->conn->privateData;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainGetSchedulerTypeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virQEMUDriverIsPrivileged(driver)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("CPU tuning is not available in session mode"));
goto cleanup;
}
/* Domain not running, thus no cgroups - return defaults */
if (!virDomainObjIsActive(vm)) {
if (nparams)
*nparams = 9;
ignore_value(VIR_STRDUP(ret, "posix"));
goto cleanup;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (nparams) {
if (virCgroupSupportsCpuBW(priv->cgroup))
*nparams = 9;
else
*nparams = 1;
}
ignore_value(VIR_STRDUP(ret, "posix"));
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* blkioDeviceStr in the form of /device/path,weight,/device/path,weight
* for example, /dev/disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0,800
*/
static int
qemuDomainParseBlkioDeviceStr(char *blkioDeviceStr, const char *type,
virBlkioDevicePtr *dev, size_t *size)
{
char *temp;
int ndevices = 0;
int nsep = 0;
size_t i;
virBlkioDevicePtr result = NULL;
*dev = NULL;
*size = 0;
if (STREQ(blkioDeviceStr, ""))
return 0;
temp = blkioDeviceStr;
while (temp) {
temp = strchr(temp, ',');
if (temp) {
temp++;
nsep++;
}
}
/* A valid string must have even number of fields, hence an odd
* number of commas. */
if (!(nsep & 1))
goto parse_error;
ndevices = (nsep + 1) / 2;
if (VIR_ALLOC_N(result, ndevices) < 0)
return -1;
i = 0;
temp = blkioDeviceStr;
while (temp) {
char *p = temp;
/* device path */
p = strchr(p, ',');
if (!p)
goto parse_error;
if (VIR_STRNDUP(result[i].path, temp, p - temp) < 0)
goto cleanup;
/* value */
temp = p + 1;
if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
if (virStrToLong_uip(temp, &p, 10, &result[i].weight) < 0)
goto number_error;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) {
if (virStrToLong_uip(temp, &p, 10, &result[i].riops) < 0)
goto number_error;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) {
if (virStrToLong_uip(temp, &p, 10, &result[i].wiops) < 0)
goto number_error;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) {
if (virStrToLong_ullp(temp, &p, 10, &result[i].rbps) < 0)
goto number_error;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
if (virStrToLong_ullp(temp, &p, 10, &result[i].wbps) < 0)
goto number_error;
} else {
virReportError(VIR_ERR_INVALID_ARG,
_("unknown parameter '%s'"), type);
goto cleanup;
}
i++;
if (*p == '\0')
break;
else if (*p != ',')
goto parse_error;
temp = p + 1;
}
if (!i)
VIR_FREE(result);
*dev = result;
*size = i;
return 0;
parse_error:
virReportError(VIR_ERR_INVALID_ARG,
_("unable to parse blkio device '%s' '%s'"),
type, blkioDeviceStr);
goto cleanup;
number_error:
virReportError(VIR_ERR_INVALID_ARG,
_("invalid value '%s' for parameter '%s' of device '%s'"),
temp, type, result[i].path);
cleanup:
if (result) {
virBlkioDeviceArrayClear(result, ndevices);
VIR_FREE(result);
}
return -1;
}
/* Modify dest_array to reflect all blkio device changes described in
* src_array. */
static int
qemuDomainMergeBlkioDevice(virBlkioDevicePtr *dest_array,
size_t *dest_size,
virBlkioDevicePtr src_array,
size_t src_size,
const char *type)
{
size_t i, j;
virBlkioDevicePtr dest, src;
for (i = 0; i < src_size; i++) {
bool found = false;
src = &src_array[i];
for (j = 0; j < *dest_size; j++) {
dest = &(*dest_array)[j];
if (STREQ(src->path, dest->path)) {
found = true;
if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
dest->weight = src->weight;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) {
dest->riops = src->riops;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) {
dest->wiops = src->wiops;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) {
dest->rbps = src->rbps;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
dest->wbps = src->wbps;
} else {
virReportError(VIR_ERR_INVALID_ARG, _("Unknown parameter %s"),
type);
return -1;
}
break;
}
}
if (!found) {
if (!src->weight && !src->riops && !src->wiops && !src->rbps && !src->wbps)
continue;
if (VIR_EXPAND_N(*dest_array, *dest_size, 1) < 0)
return -1;
dest = &(*dest_array)[*dest_size - 1];
if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
dest->weight = src->weight;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) {
dest->riops = src->riops;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) {
dest->wiops = src->wiops;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) {
dest->rbps = src->rbps;
} else if (STREQ(type, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
dest->wbps = src->wbps;
} else {
*dest_size = *dest_size - 1;
return -1;
}
dest->path = src->path;
src->path = NULL;
}
}
return 0;
}
static int
qemuDomainSetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
size_t i;
virDomainObjPtr vm = NULL;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
int ret = -1;
virQEMUDriverConfigPtr cfg = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_BLKIO_WEIGHT,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BLKIO_DEVICE_WEIGHT,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLKIO_DEVICE_READ_BPS,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS,
VIR_TYPED_PARAM_STRING,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetBlkioParametersEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (!virQEMUDriverIsPrivileged(driver)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Block I/O tuning is not available in session mode"));
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_BLKIO)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("blkio cgroup isn't mounted"));
goto endjob;
}
}
ret = 0;
if (def) {
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_BLKIO_WEIGHT)) {
if (virCgroupSetBlkioWeight(priv->cgroup, param->value.ui) < 0 ||
virCgroupGetBlkioWeight(priv->cgroup, &def->blkio.weight) < 0)
ret = -1;
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
size_t ndevices;
virBlkioDevicePtr devices = NULL;
size_t j;
if (qemuDomainParseBlkioDeviceStr(param->value.s,
param->field,
&devices,
&ndevices) < 0) {
ret = -1;
continue;
}
if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceWeight(priv->cgroup,
devices[j].path,
devices[j].weight) < 0 ||
virCgroupGetBlkioDeviceWeight(priv->cgroup,
devices[j].path,
&devices[j].weight) < 0) {
ret = -1;
break;
}
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceReadIops(priv->cgroup,
devices[j].path,
devices[j].riops) < 0 ||
virCgroupGetBlkioDeviceReadIops(priv->cgroup,
devices[j].path,
&devices[j].riops) < 0) {
ret = -1;
break;
}
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceWriteIops(priv->cgroup,
devices[j].path,
devices[j].wiops) < 0 ||
virCgroupGetBlkioDeviceWriteIops(priv->cgroup,
devices[j].path,
&devices[j].wiops) < 0) {
ret = -1;
break;
}
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceReadBps(priv->cgroup,
devices[j].path,
devices[j].rbps) < 0 ||
virCgroupGetBlkioDeviceReadBps(priv->cgroup,
devices[j].path,
&devices[j].rbps) < 0) {
ret = -1;
break;
}
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
for (j = 0; j < ndevices; j++) {
if (virCgroupSetBlkioDeviceWriteBps(priv->cgroup,
devices[j].path,
devices[j].wbps) < 0 ||
virCgroupGetBlkioDeviceWriteBps(priv->cgroup,
devices[j].path,
&devices[j].wbps) < 0) {
ret = -1;
break;
}
}
} else {
virReportError(VIR_ERR_INVALID_ARG, _("Unknown blkio parameter %s"),
param->field);
ret = -1;
virBlkioDeviceArrayClear(devices, ndevices);
VIR_FREE(devices);
continue;
}
if (j != ndevices ||
qemuDomainMergeBlkioDevice(&def->blkio.devices,
&def->blkio.ndevices,
devices, ndevices, param->field) < 0)
ret = -1;
virBlkioDeviceArrayClear(devices, ndevices);
VIR_FREE(devices);
}
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
}
if (ret < 0)
goto endjob;
if (persistentDef) {
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_BLKIO_WEIGHT)) {
persistentDef->blkio.weight = param->value.ui;
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_IOPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_IOPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_READ_BPS) ||
STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WRITE_BPS)) {
virBlkioDevicePtr devices = NULL;
size_t ndevices;
if (qemuDomainParseBlkioDeviceStr(param->value.s,
param->field,
&devices,
&ndevices) < 0) {
ret = -1;
continue;
}
if (qemuDomainMergeBlkioDevice(&persistentDef->blkio.devices,
&persistentDef->blkio.ndevices,
devices, ndevices, param->field) < 0)
ret = -1;
virBlkioDeviceArrayClear(devices, ndevices);
VIR_FREE(devices);
}
}
if (virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef) < 0)
ret = -1;
}
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
int maxparams = QEMU_NB_BLKIO_PARAM;
unsigned int val;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
/* We blindly return a string, and let libvirt.c and
* remote_driver.c do the filtering on behalf of older clients
* that can't parse it. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
if (virDomainGetBlkioParametersEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virQEMUDriverIsPrivileged(driver)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Block I/O tuning is not available in session mode"));
goto cleanup;
}
if ((*nparams) == 0) {
/* Current number of blkio parameters supported by cgroups */
*nparams = QEMU_NB_BLKIO_PARAM;
ret = 0;
goto cleanup;
} else if (*nparams < maxparams) {
maxparams = *nparams;
}
*nparams = 0;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto cleanup;
if (def) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_BLKIO)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("blkio cgroup isn't mounted"));
goto cleanup;
}
/* fill blkio weight here */
if (virCgroupGetBlkioWeight(priv->cgroup, &val) < 0)
goto cleanup;
if (virTypedParameterAssign(&(params[(*nparams)++]),
VIR_DOMAIN_BLKIO_WEIGHT,
VIR_TYPED_PARAM_UINT, val) < 0)
goto cleanup;
if (virDomainGetBlkioParametersAssignFromDef(def, params, nparams,
maxparams) < 0)
goto cleanup;
} else if (persistentDef) {
/* fill blkio weight here */
if (virTypedParameterAssign(&(params[(*nparams)++]),
VIR_DOMAIN_BLKIO_WEIGHT,
VIR_TYPED_PARAM_UINT,
persistentDef->blkio.weight) < 0)
goto cleanup;
if (virDomainGetBlkioParametersAssignFromDef(persistentDef, params,
nparams, maxparams) < 0)
goto cleanup;
}
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainSetMemoryParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
virDomainObjPtr vm = NULL;
unsigned long long swap_hard_limit;
unsigned long long hard_limit = 0;
unsigned long long soft_limit = 0;
bool set_swap_hard_limit = false;
bool set_hard_limit = false;
bool set_soft_limit = false;
virQEMUDriverConfigPtr cfg = NULL;
int rc;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_MEMORY_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_MEMORY_SOFT_LIMIT,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetMemoryParametersEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (!virQEMUDriverIsPrivileged(driver)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Memory tuning is not available in session mode"));
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
/* QEMU and LXC implementation are identical */
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (def &&
!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_MEMORY)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cgroup memory controller is not mounted"));
goto endjob;
}
#define VIR_GET_LIMIT_PARAMETER(PARAM, VALUE) \
if ((rc = virTypedParamsGetULLong(params, nparams, PARAM, &VALUE)) < 0) \
goto endjob; \
\
if (rc == 1) \
set_ ## VALUE = true;
VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT, swap_hard_limit)
VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_HARD_LIMIT, hard_limit)
VIR_GET_LIMIT_PARAMETER(VIR_DOMAIN_MEMORY_SOFT_LIMIT, soft_limit)
#undef VIR_GET_LIMIT_PARAMETER
/* Swap hard limit must be greater than hard limit. */
if (set_swap_hard_limit || set_hard_limit) {
unsigned long long mem_limit = vm->def->mem.hard_limit;
unsigned long long swap_limit = vm->def->mem.swap_hard_limit;
if (set_swap_hard_limit)
swap_limit = swap_hard_limit;
if (set_hard_limit)
mem_limit = hard_limit;
if (mem_limit > swap_limit) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("memory hard_limit tunable value must be lower "
"than or equal to swap_hard_limit"));
goto endjob;
}
}
#define VIR_SET_MEM_PARAMETER(FUNC, VALUE) \
if (set_ ## VALUE) { \
if (def) { \
if ((rc = FUNC(priv->cgroup, VALUE)) < 0) \
goto endjob; \
def->mem.VALUE = VALUE; \
} \
\
if (persistentDef) \
persistentDef->mem.VALUE = VALUE; \
}
/* Soft limit doesn't clash with the others */
VIR_SET_MEM_PARAMETER(virCgroupSetMemorySoftLimit, soft_limit);
/* set hard limit before swap hard limit if decreasing it */
if (def && def->mem.hard_limit > hard_limit) {
VIR_SET_MEM_PARAMETER(virCgroupSetMemoryHardLimit, hard_limit);
/* inhibit changing the limit a second time */
set_hard_limit = false;
}
VIR_SET_MEM_PARAMETER(virCgroupSetMemSwapHardLimit, swap_hard_limit);
/* otherwise increase it after swap hard limit */
VIR_SET_MEM_PARAMETER(virCgroupSetMemoryHardLimit, hard_limit);
#undef VIR_SET_MEM_PARAMETER
if (def &&
virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
if (persistentDef &&
virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef) < 0)
goto endjob;
/* QEMU and LXC implementations are identical */
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
#define QEMU_ASSIGN_MEM_PARAM(index, name, value) \
if (index < *nparams && \
virTypedParameterAssign(&params[index], name, VIR_TYPED_PARAM_ULLONG, \
value) < 0) \
goto cleanup
static int
qemuDomainGetMemoryParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
unsigned long long swap_hard_limit, mem_hard_limit, mem_soft_limit;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
if (virDomainGetMemoryParametersEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virQEMUDriverIsPrivileged(driver)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Memory tuning is not available in session mode"));
goto cleanup;
}
if (virDomainObjGetDefs(vm, flags, NULL, &persistentDef) < 0)
goto cleanup;
if ((*nparams) == 0) {
/* Current number of memory parameters supported by cgroups */
*nparams = QEMU_NB_MEM_PARAM;
ret = 0;
goto cleanup;
}
if (persistentDef) {
mem_hard_limit = persistentDef->mem.hard_limit;
mem_soft_limit = persistentDef->mem.soft_limit;
swap_hard_limit = persistentDef->mem.swap_hard_limit;
} else {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_MEMORY)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup memory controller is not mounted"));
goto cleanup;
}
if (virCgroupGetMemoryHardLimit(priv->cgroup, &mem_hard_limit) < 0)
goto cleanup;
if (virCgroupGetMemorySoftLimit(priv->cgroup, &mem_soft_limit) < 0)
goto cleanup;
if (virCgroupGetMemSwapHardLimit(priv->cgroup, &swap_hard_limit) < 0) {
if (!virLastErrorIsSystemErrno(ENOENT) &&
!virLastErrorIsSystemErrno(EOPNOTSUPP))
goto cleanup;
swap_hard_limit = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
}
}
QEMU_ASSIGN_MEM_PARAM(0, VIR_DOMAIN_MEMORY_HARD_LIMIT, mem_hard_limit);
QEMU_ASSIGN_MEM_PARAM(1, VIR_DOMAIN_MEMORY_SOFT_LIMIT, mem_soft_limit);
QEMU_ASSIGN_MEM_PARAM(2, VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT, swap_hard_limit);
if (QEMU_NB_MEM_PARAM < *nparams)
*nparams = QEMU_NB_MEM_PARAM;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
#undef QEMU_ASSIGN_MEM_PARAM
static int
qemuDomainSetNumaParamsLive(virDomainObjPtr vm,
virBitmapPtr nodeset)
{
virCgroupPtr cgroup_temp = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
char *nodeset_str = NULL;
virDomainNumatuneMemMode mode;
size_t i = 0;
int ret = -1;
if (virDomainNumatuneGetMode(vm->def->numa, -1, &mode) == 0 &&
mode != VIR_DOMAIN_NUMATUNE_MEM_STRICT) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("change of nodeset for running domain "
"requires strict numa mode"));
goto cleanup;
}
if (!virNumaNodesetIsAvailable(nodeset))
goto cleanup;
/* Ensure the cpuset string is formatted before passing to cgroup */
if (!(nodeset_str = virBitmapFormat(nodeset)))
goto cleanup;
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_EMULATOR, 0,
false, &cgroup_temp) < 0 ||
virCgroupSetCpusetMems(cgroup_temp, nodeset_str) < 0)
goto cleanup;
virCgroupFree(&cgroup_temp);
for (i = 0; i < virDomainDefGetVcpusMax(vm->def); i++) {
virDomainVcpuDefPtr vcpu = virDomainDefGetVcpu(vm->def, i);
if (!vcpu->online)
continue;
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_VCPU, i,
false, &cgroup_temp) < 0 ||
virCgroupSetCpusetMems(cgroup_temp, nodeset_str) < 0)
goto cleanup;
virCgroupFree(&cgroup_temp);
}
for (i = 0; i < vm->def->niothreadids; i++) {
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_IOTHREAD,
vm->def->iothreadids[i]->iothread_id,
false, &cgroup_temp) < 0 ||
virCgroupSetCpusetMems(cgroup_temp, nodeset_str) < 0)
goto cleanup;
virCgroupFree(&cgroup_temp);
}
ret = 0;
cleanup:
VIR_FREE(nodeset_str);
virCgroupFree(&cgroup_temp);
return ret;
}
static int
qemuDomainSetNumaParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
size_t i;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
virDomainObjPtr vm = NULL;
int ret = -1;
virQEMUDriverConfigPtr cfg = NULL;
qemuDomainObjPrivatePtr priv;
virBitmapPtr nodeset = NULL;
virDomainNumatuneMemMode config_mode;
int mode = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_NUMA_MODE,
VIR_TYPED_PARAM_INT,
VIR_DOMAIN_NUMA_NODESET,
VIR_TYPED_PARAM_STRING,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetNumaParametersEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_NUMA_MODE)) {
mode = param->value.i;
if (mode < 0 || mode >= VIR_DOMAIN_NUMATUNE_MEM_LAST) {
virReportError(VIR_ERR_INVALID_ARG,
_("unsupported numatune mode: '%d'"), mode);
goto cleanup;
}
} else if (STREQ(param->field, VIR_DOMAIN_NUMA_NODESET)) {
if (virBitmapParse(param->value.s, &nodeset,
VIR_DOMAIN_CPUMASK_LEN) < 0)
goto cleanup;
if (virBitmapIsAllClear(nodeset)) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("Invalid nodeset of 'numatune': %s"),
param->value.s);
goto cleanup;
}
}
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (def) {
if (!virQEMUDriverIsPrivileged(driver)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("NUMA tuning is not available in session mode"));
goto endjob;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cgroup cpuset controller is not mounted"));
goto endjob;
}
if (mode != -1 &&
virDomainNumatuneGetMode(def->numa, -1, &config_mode) == 0 &&
config_mode != mode) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("can't change numatune mode for running domain"));
goto endjob;
}
if (nodeset &&
qemuDomainSetNumaParamsLive(vm, nodeset) < 0)
goto endjob;
if (virDomainNumatuneSet(def->numa,
def->placement_mode ==
VIR_DOMAIN_CPU_PLACEMENT_MODE_STATIC,
-1, mode, nodeset) < 0)
goto endjob;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
}
if (persistentDef) {
if (virDomainNumatuneSet(persistentDef->numa,
persistentDef->placement_mode ==
VIR_DOMAIN_CPU_PLACEMENT_MODE_STATIC,
-1, mode, nodeset) < 0)
goto endjob;
if (virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef) < 0)
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virBitmapFree(nodeset);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetNumaParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
size_t i;
virDomainObjPtr vm = NULL;
virDomainNumatuneMemMode tmpmode = VIR_DOMAIN_NUMATUNE_MEM_STRICT;
qemuDomainObjPrivatePtr priv;
char *nodeset = NULL;
int ret = -1;
virDomainDefPtr def = NULL;
bool live = false;
virBitmapPtr autoNodeset = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
if (virDomainGetNumaParametersEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!(def = virDomainObjGetOneDefState(vm, flags, &live)))
goto cleanup;
if (live)
autoNodeset = priv->autoNodeset;
if ((*nparams) == 0) {
*nparams = QEMU_NB_NUMA_PARAM;
ret = 0;
goto cleanup;
}
for (i = 0; i < QEMU_NB_NUMA_PARAM && i < *nparams; i++) {
virMemoryParameterPtr param = &params[i];
switch (i) {
case 0: /* fill numa mode here */
ignore_value(virDomainNumatuneGetMode(def->numa, -1, &tmpmode));
if (virTypedParameterAssign(param, VIR_DOMAIN_NUMA_MODE,
VIR_TYPED_PARAM_INT, tmpmode) < 0)
goto cleanup;
break;
case 1: /* fill numa nodeset here */
nodeset = virDomainNumatuneFormatNodeset(def->numa, autoNodeset, -1);
if (!nodeset ||
virTypedParameterAssign(param, VIR_DOMAIN_NUMA_NODESET,
VIR_TYPED_PARAM_STRING, nodeset) < 0)
goto cleanup;
nodeset = NULL;
break;
/* coverity[dead_error_begin] */
default:
break;
/* should not hit here */
}
}
if (*nparams > QEMU_NB_NUMA_PARAM)
*nparams = QEMU_NB_NUMA_PARAM;
ret = 0;
cleanup:
VIR_FREE(nodeset);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuSetGlobalBWLive(virCgroupPtr cgroup, unsigned long long period,
long long quota)
{
if (period == 0 && quota == 0)
return 0;
if (qemuSetupCgroupVcpuBW(cgroup, period, quota) < 0)
return -1;
return 0;
}
static int
qemuDomainSetPerfEvents(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
size_t i;
virDomainObjPtr vm = NULL;
virQEMUDriverConfigPtr cfg = NULL;
qemuDomainObjPrivatePtr priv;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
int ret = -1;
virPerfEventType type;
bool enabled;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_PERF_PARAM_CMT, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_MBMT, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_MBML, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_CPU_CYCLES, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_INSTRUCTIONS, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_CACHE_REFERENCES, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_CACHE_MISSES, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_BRANCH_INSTRUCTIONS, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_BRANCH_MISSES, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_BUS_CYCLES, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_STALLED_CYCLES_FRONTEND, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_STALLED_CYCLES_BACKEND, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_REF_CPU_CYCLES, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_CPU_CLOCK, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_TASK_CLOCK, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_PAGE_FAULTS, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_CONTEXT_SWITCHES, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_CPU_MIGRATIONS, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_PAGE_FAULTS_MIN, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_PAGE_FAULTS_MAJ, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_ALIGNMENT_FAULTS, VIR_TYPED_PARAM_BOOLEAN,
VIR_PERF_PARAM_EMULATION_FAULTS, VIR_TYPED_PARAM_BOOLEAN,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
priv = vm->privateData;
if (virDomainSetPerfEventsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (def) {
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
enabled = param->value.b;
type = virPerfEventTypeFromString(param->field);
if (!enabled && virPerfEventDisable(priv->perf, type) < 0)
goto endjob;
if (enabled && virPerfEventEnable(priv->perf, type, vm->pid) < 0)
goto endjob;
def->perf.events[type] = enabled ?
VIR_TRISTATE_BOOL_YES : VIR_TRISTATE_BOOL_NO;
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
}
if (persistentDef) {
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
enabled = param->value.b;
type = virPerfEventTypeFromString(param->field);
persistentDef->perf.events[type] = enabled ?
VIR_TRISTATE_BOOL_YES : VIR_TRISTATE_BOOL_NO;
}
if (virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef) < 0)
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetPerfEvents(virDomainPtr dom,
virTypedParameterPtr *params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
virDomainDefPtr def;
virTypedParameterPtr par = NULL;
int maxpar = 0;
int npar = 0;
size_t i;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetPerfEventsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
goto endjob;
if (!(def = virDomainObjGetOneDef(vm, flags)))
goto endjob;
priv = vm->privateData;
for (i = 0; i < VIR_PERF_EVENT_LAST; i++) {
bool perf_enabled;
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
perf_enabled = def->perf.events[i] == VIR_TRISTATE_BOOL_YES;
else
perf_enabled = virPerfEventIsEnabled(priv->perf, i);
if (virTypedParamsAddBoolean(&par, &npar, &maxpar,
virPerfEventTypeToString(i),
perf_enabled) < 0)
goto endjob;
}
*params = par;
*nparams = npar;
par = NULL;
npar = 0;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virTypedParamsFree(par, npar);
return ret;
}
static int
qemuSetVcpusBWLive(virDomainObjPtr vm, virCgroupPtr cgroup,
unsigned long long period, long long quota)
{
size_t i;
virCgroupPtr cgroup_vcpu = NULL;
if (period == 0 && quota == 0)
return 0;
if (!qemuDomainHasVcpuPids(vm))
return 0;
for (i = 0; i < virDomainDefGetVcpusMax(vm->def); i++) {
virDomainVcpuDefPtr vcpu = virDomainDefGetVcpu(vm->def, i);
if (!vcpu->online)
continue;
if (virCgroupNewThread(cgroup, VIR_CGROUP_THREAD_VCPU, i,
false, &cgroup_vcpu) < 0)
goto cleanup;
if (qemuSetupCgroupVcpuBW(cgroup_vcpu, period, quota) < 0)
goto cleanup;
virCgroupFree(&cgroup_vcpu);
}
return 0;
cleanup:
virCgroupFree(&cgroup_vcpu);
return -1;
}
static int
qemuSetEmulatorBandwidthLive(virCgroupPtr cgroup,
unsigned long long period,
long long quota)
{
virCgroupPtr cgroup_emulator = NULL;
if (period == 0 && quota == 0)
return 0;
if (virCgroupNewThread(cgroup, VIR_CGROUP_THREAD_EMULATOR, 0,
false, &cgroup_emulator) < 0)
goto cleanup;
if (qemuSetupCgroupVcpuBW(cgroup_emulator, period, quota) < 0)
goto cleanup;
virCgroupFree(&cgroup_emulator);
return 0;
cleanup:
virCgroupFree(&cgroup_emulator);
return -1;
}
static int
qemuSetIOThreadsBWLive(virDomainObjPtr vm, virCgroupPtr cgroup,
unsigned long long period, long long quota)
{
size_t i;
virCgroupPtr cgroup_iothread = NULL;
if (period == 0 && quota == 0)
return 0;
if (!vm->def->niothreadids)
return 0;
for (i = 0; i < vm->def->niothreadids; i++) {
if (virCgroupNewThread(cgroup, VIR_CGROUP_THREAD_IOTHREAD,
vm->def->iothreadids[i]->iothread_id,
false, &cgroup_iothread) < 0)
goto cleanup;
if (qemuSetupCgroupVcpuBW(cgroup_iothread, period, quota) < 0)
goto cleanup;
virCgroupFree(&cgroup_iothread);
}
return 0;
cleanup:
virCgroupFree(&cgroup_iothread);
return -1;
}
#define SCHED_RANGE_CHECK(VAR, NAME, MIN, MAX) \
if (((VAR) > 0 && (VAR) < (MIN)) || (VAR) > (MAX)) { \
virReportError(VIR_ERR_INVALID_ARG, \
_("value of '%s' is out of range [%lld, %lld]"), \
NAME, MIN, MAX); \
rc = -1; \
goto endjob; \
}
static int
qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
size_t i;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
virDomainDefPtr persistentDefCopy = NULL;
unsigned long long value_ul;
long long value_l;
int ret = -1;
int rc;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
qemuDomainObjPrivatePtr priv;
virObjectEventPtr event = NULL;
virTypedParameterPtr eventParams = NULL;
int eventNparams = 0;
int eventMaxNparams = 0;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_SCHEDULER_CPU_SHARES,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_SCHEDULER_VCPU_PERIOD,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_SCHEDULER_VCPU_QUOTA,
VIR_TYPED_PARAM_LLONG,
VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_SCHEDULER_GLOBAL_QUOTA,
VIR_TYPED_PARAM_LLONG,
VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA,
VIR_TYPED_PARAM_LLONG,
VIR_DOMAIN_SCHEDULER_IOTHREAD_PERIOD,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_SCHEDULER_IOTHREAD_QUOTA,
VIR_TYPED_PARAM_LLONG,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetSchedulerParametersFlagsEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (!virQEMUDriverIsPrivileged(driver)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("CPU tuning is not available in session mode"));
goto cleanup;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (persistentDef) {
/* Make a copy for updated domain. */
if (!(persistentDefCopy = virDomainObjCopyPersistentDef(vm, caps,
driver->xmlopt)))
goto endjob;
}
if (def &&
!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cgroup CPU controller is not mounted"));
goto endjob;
}
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
value_ul = param->value.ul;
value_l = param->value.l;
if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_CPU_SHARES)) {
if (def) {
unsigned long long val;
if (virCgroupSetCpuShares(priv->cgroup, value_ul) < 0)
goto endjob;
if (virCgroupGetCpuShares(priv->cgroup, &val) < 0)
goto endjob;
def->cputune.shares = val;
def->cputune.sharesSpecified = true;
if (virTypedParamsAddULLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_CPU_SHARES,
val) < 0)
goto endjob;
}
if (persistentDef) {
persistentDefCopy->cputune.shares = value_ul;
persistentDefCopy->cputune.sharesSpecified = true;
}
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_VCPU_PERIOD)) {
SCHED_RANGE_CHECK(value_ul, VIR_DOMAIN_SCHEDULER_VCPU_PERIOD,
QEMU_SCHED_MIN_PERIOD, QEMU_SCHED_MAX_PERIOD);
if (def && value_ul) {
if ((rc = qemuSetVcpusBWLive(vm, priv->cgroup, value_ul, 0)))
goto endjob;
def->cputune.period = value_ul;
if (virTypedParamsAddULLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_VCPU_PERIOD,
value_ul) < 0)
goto endjob;
}
if (persistentDef)
persistentDefCopy->cputune.period = params[i].value.ul;
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_VCPU_QUOTA)) {
SCHED_RANGE_CHECK(value_l, VIR_DOMAIN_SCHEDULER_VCPU_QUOTA,
QEMU_SCHED_MIN_QUOTA, QEMU_SCHED_MAX_QUOTA);
if (def && value_l) {
if ((rc = qemuSetVcpusBWLive(vm, priv->cgroup, 0, value_l)))
goto endjob;
def->cputune.quota = value_l;
if (virTypedParamsAddLLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_VCPU_QUOTA,
value_l) < 0)
goto endjob;
}
if (persistentDef)
persistentDefCopy->cputune.quota = value_l;
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD)) {
SCHED_RANGE_CHECK(value_ul, VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD,
QEMU_SCHED_MIN_PERIOD, QEMU_SCHED_MAX_PERIOD);
if (def && value_ul) {
if ((rc = qemuSetGlobalBWLive(priv->cgroup, value_ul, 0)))
goto endjob;
def->cputune.global_period = value_ul;
if (virTypedParamsAddULLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_GLOBAL_PERIOD,
value_ul) < 0)
goto endjob;
}
if (persistentDef)
persistentDefCopy->cputune.period = params[i].value.ul;
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_GLOBAL_QUOTA)) {
SCHED_RANGE_CHECK(value_l, VIR_DOMAIN_SCHEDULER_GLOBAL_QUOTA,
QEMU_SCHED_MIN_QUOTA, QEMU_SCHED_MAX_QUOTA);
if (def && value_l) {
if ((rc = qemuSetGlobalBWLive(priv->cgroup, 0, value_l)))
goto endjob;
def->cputune.global_quota = value_l;
if (virTypedParamsAddLLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_GLOBAL_QUOTA,
value_l) < 0)
goto endjob;
}
if (persistentDef)
persistentDefCopy->cputune.global_quota = value_l;
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD)) {
SCHED_RANGE_CHECK(value_ul, VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD,
QEMU_SCHED_MIN_PERIOD, QEMU_SCHED_MAX_PERIOD);
if (def && value_ul) {
if ((rc = qemuSetEmulatorBandwidthLive(priv->cgroup,
value_ul, 0)))
goto endjob;
def->cputune.emulator_period = value_ul;
if (virTypedParamsAddULLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_EMULATOR_PERIOD,
value_ul) < 0)
goto endjob;
}
if (persistentDef)
persistentDefCopy->cputune.emulator_period = value_ul;
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA)) {
SCHED_RANGE_CHECK(value_l, VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA,
QEMU_SCHED_MIN_QUOTA, QEMU_SCHED_MAX_QUOTA);
if (def && value_l) {
if ((rc = qemuSetEmulatorBandwidthLive(priv->cgroup,
0, value_l)))
goto endjob;
def->cputune.emulator_quota = value_l;
if (virTypedParamsAddLLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_EMULATOR_QUOTA,
value_l) < 0)
goto endjob;
}
if (persistentDef)
persistentDefCopy->cputune.emulator_quota = value_l;
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_IOTHREAD_PERIOD)) {
SCHED_RANGE_CHECK(value_ul, VIR_DOMAIN_SCHEDULER_IOTHREAD_PERIOD,
QEMU_SCHED_MIN_PERIOD, QEMU_SCHED_MAX_PERIOD);
if (def && value_ul) {
if ((rc = qemuSetIOThreadsBWLive(vm, priv->cgroup, value_ul, 0)))
goto endjob;
def->cputune.iothread_period = value_ul;
if (virTypedParamsAddULLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_IOTHREAD_PERIOD,
value_ul) < 0)
goto endjob;
}
if (persistentDef)
persistentDefCopy->cputune.iothread_period = params[i].value.ul;
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_IOTHREAD_QUOTA)) {
SCHED_RANGE_CHECK(value_l, VIR_DOMAIN_SCHEDULER_IOTHREAD_QUOTA,
QEMU_SCHED_MIN_QUOTA, QEMU_SCHED_MAX_QUOTA);
if (def && value_l) {
if ((rc = qemuSetIOThreadsBWLive(vm, priv->cgroup, 0, value_l)))
goto endjob;
def->cputune.iothread_quota = value_l;
if (virTypedParamsAddLLong(&eventParams, &eventNparams,
&eventMaxNparams,
VIR_DOMAIN_TUNABLE_CPU_IOTHREAD_QUOTA,
value_l) < 0)
goto endjob;
}
if (persistentDef)
persistentDefCopy->cputune.iothread_quota = value_l;
}
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
if (eventNparams) {
event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
eventNparams = 0;
qemuDomainEventQueue(driver, event);
}
if (persistentDef) {
rc = virDomainSaveConfig(cfg->configDir, driver->caps, persistentDefCopy);
if (rc < 0)
goto endjob;
virDomainObjAssignDef(vm, persistentDefCopy, false, NULL);
persistentDefCopy = NULL;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainDefFree(persistentDefCopy);
virDomainObjEndAPI(&vm);
if (eventNparams)
virTypedParamsFree(eventParams, eventNparams);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
#undef SCHED_RANGE_CHECK
static int
qemuDomainSetSchedulerParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams)
{
return qemuDomainSetSchedulerParametersFlags(dom,
params,
nparams,
VIR_DOMAIN_AFFECT_CURRENT);
}
static int
qemuGetVcpuBWLive(virCgroupPtr cgroup, unsigned long long *period,
long long *quota)
{
if (virCgroupGetCpuCfsPeriod(cgroup, period) < 0)
return -1;
if (virCgroupGetCpuCfsQuota(cgroup, quota) < 0)
return -1;
return 0;
}
static int
qemuGetVcpusBWLive(virDomainObjPtr vm,
unsigned long long *period, long long *quota)
{
virCgroupPtr cgroup_vcpu = NULL;
qemuDomainObjPrivatePtr priv = NULL;
int rc;
int ret = -1;
priv = vm->privateData;
if (!qemuDomainHasVcpuPids(vm)) {
/* We do not create sub dir for each vcpu */
rc = qemuGetVcpuBWLive(priv->cgroup, period, quota);
if (rc < 0)
goto cleanup;
if (*quota > 0)
*quota /= virDomainDefGetVcpus(vm->def);
goto out;
}
/* get period and quota for vcpu0 */
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_VCPU, 0,
false, &cgroup_vcpu) < 0)
goto cleanup;
rc = qemuGetVcpuBWLive(cgroup_vcpu, period, quota);
if (rc < 0)
goto cleanup;
out:
ret = 0;
cleanup:
virCgroupFree(&cgroup_vcpu);
return ret;
}
static int
qemuGetEmulatorBandwidthLive(virCgroupPtr cgroup,
unsigned long long *period,
long long *quota)
{
virCgroupPtr cgroup_emulator = NULL;
int ret = -1;
/* get period and quota for emulator */
if (virCgroupNewThread(cgroup, VIR_CGROUP_THREAD_EMULATOR, 0,
false, &cgroup_emulator) < 0)
goto cleanup;
if (qemuGetVcpuBWLive(cgroup_emulator, period, quota) < 0)
goto cleanup;
ret = 0;
cleanup:
virCgroupFree(&cgroup_emulator);
return ret;
}
static int
qemuGetIOThreadsBWLive(virDomainObjPtr vm,
unsigned long long *period, long long *quota)
{
virCgroupPtr cgroup_iothread = NULL;
qemuDomainObjPrivatePtr priv = NULL;
int rc;
int ret = -1;
priv = vm->privateData;
if (!vm->def->niothreadids) {
/* We do not create sub dir for each iothread */
if ((rc = qemuGetVcpuBWLive(priv->cgroup, period, quota)) < 0)
goto cleanup;
goto out;
}
/* get period and quota for the "first" IOThread */
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_IOTHREAD,
vm->def->iothreadids[0]->iothread_id,
false, &cgroup_iothread) < 0)
goto cleanup;
rc = qemuGetVcpuBWLive(cgroup_iothread, period, quota);
if (rc < 0)
goto cleanup;
out:
ret = 0;
cleanup:
virCgroupFree(&cgroup_iothread);
return ret;
}
static int
qemuGetGlobalBWLive(virCgroupPtr cgroup, unsigned long long *period,
long long *quota)
{
if (qemuGetVcpuBWLive(cgroup, period, quota) < 0)
return -1;
return 0;
}
static int
qemuDomainGetSchedulerParametersFlags(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainCputune data = {0};
int ret = -1;
bool cpu_bw_status = true;
virDomainDefPtr persistentDef;
virDomainDefPtr def;
qemuDomainObjPrivatePtr priv;
int maxparams = *nparams;
*nparams = 0;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainGetSchedulerParametersFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virQEMUDriverIsPrivileged(driver)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("CPU tuning is not available in session mode"));
goto cleanup;
}
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto cleanup;
if (persistentDef) {
data = persistentDef->cputune;
} else if (def) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (virCgroupGetCpuShares(priv->cgroup, &data.shares) < 0)
goto cleanup;
if (virCgroupSupportsCpuBW(priv->cgroup)) {
if (maxparams > 1 &&
qemuGetVcpusBWLive(vm, &data.period, &data.quota) < 0)
goto cleanup;
if (maxparams > 3 &&
qemuGetEmulatorBandwidthLive(priv->cgroup, &data.emulator_period,
&data.emulator_quota) < 0)
goto cleanup;
if (maxparams > 5 &&
qemuGetGlobalBWLive(priv->cgroup, &data.global_period,
&data.global_quota) < 0)
goto cleanup;
if (maxparams > 7 &&
qemuGetIOThreadsBWLive(vm, &data.iothread_period,
&data.iothread_quota) < 0)
goto cleanup;
} else {
cpu_bw_status = false;
}
}
#define QEMU_SCHED_ASSIGN(param, name, type) \
if (*nparams < maxparams && \
virTypedParameterAssign(&(params[(*nparams)++]), \
VIR_DOMAIN_SCHEDULER_ ## name, \
VIR_TYPED_PARAM_ ## type, \
data.param) < 0) \
goto cleanup
QEMU_SCHED_ASSIGN(shares, CPU_SHARES, ULLONG);
if (cpu_bw_status) {
QEMU_SCHED_ASSIGN(period, VCPU_PERIOD, ULLONG);
QEMU_SCHED_ASSIGN(quota, VCPU_QUOTA, LLONG);
QEMU_SCHED_ASSIGN(emulator_period, EMULATOR_PERIOD, ULLONG);
QEMU_SCHED_ASSIGN(emulator_quota, EMULATOR_QUOTA, LLONG);
QEMU_SCHED_ASSIGN(global_period, GLOBAL_PERIOD, ULLONG);
QEMU_SCHED_ASSIGN(global_quota, GLOBAL_QUOTA, LLONG);
QEMU_SCHED_ASSIGN(iothread_period, IOTHREAD_PERIOD, ULLONG);
QEMU_SCHED_ASSIGN(iothread_quota, IOTHREAD_QUOTA, LLONG);
}
#undef QEMU_SCHED_ASSIGN
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetSchedulerParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams)
{
return qemuDomainGetSchedulerParametersFlags(dom, params, nparams,
VIR_DOMAIN_AFFECT_CURRENT);
}
/**
* Resize a block device while a guest is running. Resize to a lower size
* is supported, but should be used with extreme caution. Note that it
* only supports to resize image files, it can't resize block devices
* like LVM volumes.
*/
static int
qemuDomainBlockResize(virDomainPtr dom,
const char *path,
unsigned long long size,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
char *device = NULL;
virDomainDiskDefPtr disk = NULL;
virCheckFlags(VIR_DOMAIN_BLOCK_RESIZE_BYTES, -1);
if (path[0] == '\0') {
virReportError(VIR_ERR_INVALID_ARG,
"%s", _("empty path"));
return -1;
}
/* We prefer operating on bytes. */
if ((flags & VIR_DOMAIN_BLOCK_RESIZE_BYTES) == 0) {
if (size > ULLONG_MAX / 1024) {
virReportError(VIR_ERR_OVERFLOW,
_("size must be less than %llu"),
ULLONG_MAX / 1024);
return -1;
}
size *= 1024;
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainBlockResizeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (!(disk = virDomainDiskByName(vm->def, path, false))) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto endjob;
}
/* qcow2 and qed must be sized on 512 byte blocks/sectors,
* so adjust size if necessary to round up.
*/
if (disk->src->format == VIR_STORAGE_FILE_QCOW2 ||
disk->src->format == VIR_STORAGE_FILE_QED)
size = VIR_ROUND_UP(size, 512);
if (!(device = qemuAliasFromDisk(disk)))
goto endjob;
qemuDomainObjEnterMonitor(driver, vm);
if (qemuMonitorBlockResize(priv->mon, device, size) < 0) {
ignore_value(qemuDomainObjExitMonitor(driver, vm));
goto endjob;
}
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(device);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainBlockStatsGatherTotals(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *opaque)
{
qemuBlockStatsPtr data = payload;
qemuBlockStatsPtr total = opaque;
#define QEMU_BLOCK_STAT_TOTAL(NAME) \
if (data->NAME > 0) \
total->NAME += data->NAME
QEMU_BLOCK_STAT_TOTAL(wr_bytes);
QEMU_BLOCK_STAT_TOTAL(wr_req);
QEMU_BLOCK_STAT_TOTAL(rd_bytes);
QEMU_BLOCK_STAT_TOTAL(rd_req);
QEMU_BLOCK_STAT_TOTAL(flush_req);
QEMU_BLOCK_STAT_TOTAL(wr_total_times);
QEMU_BLOCK_STAT_TOTAL(rd_total_times);
QEMU_BLOCK_STAT_TOTAL(flush_total_times);
#undef QEMU_BLOCK_STAT_TOTAL
return 0;
}
/**
* qemuDomainBlocksStatsGather:
* @driver: driver object
* @vm: domain object
* @path: to gather the statistics for
* @retstats: returns pointer to structure holding the stats
*
* Gathers the block statistics for use in qemuDomainBlockStats* APIs.
*
* Returns -1 on error; number of filled block statistics on success.
*/
static int
qemuDomainBlocksStatsGather(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *path,
qemuBlockStatsPtr *retstats)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virDomainDiskDefPtr disk;
virHashTablePtr blockstats = NULL;
qemuBlockStatsPtr stats;
int nstats;
char *diskAlias = NULL;
int ret = -1;
if (*path) {
if (!(disk = virDomainDiskByName(vm->def, path, false))) {
virReportError(VIR_ERR_INVALID_ARG, _("invalid path: %s"), path);
goto cleanup;
}
if (!disk->info.alias) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("missing disk device alias name for %s"), disk->dst);
goto cleanup;
}
if (VIR_STRDUP(diskAlias, disk->info.alias) < 0)
goto cleanup;
}
qemuDomainObjEnterMonitor(driver, vm);
nstats = qemuMonitorGetAllBlockStatsInfo(priv->mon, &blockstats, false);
if (qemuDomainObjExitMonitor(driver, vm) < 0 || nstats < 0)
goto cleanup;
if (VIR_ALLOC(*retstats) < 0)
goto cleanup;
if (diskAlias) {
if (!(stats = virHashLookup(blockstats, diskAlias))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find statistics for device '%s'"), diskAlias);
goto cleanup;
}
**retstats = *stats;
} else {
virHashForEach(blockstats, qemuDomainBlockStatsGatherTotals, *retstats);
}
ret = nstats;
cleanup:
VIR_FREE(diskAlias);
virHashFree(blockstats);
return ret;
}
/* This uses the 'info blockstats' monitor command which was
* integrated into both qemu & kvm in late 2007. If the command is
* not supported we detect this and return the appropriate error.
*/
static int
qemuDomainBlockStats(virDomainPtr dom,
const char *path,
virDomainBlockStatsPtr stats)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuBlockStatsPtr blockstats = NULL;
int ret = -1;
virDomainObjPtr vm;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainBlockStatsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (qemuDomainBlocksStatsGather(driver, vm, path, &blockstats) < 0)
goto endjob;
stats->rd_req = blockstats->rd_req;
stats->rd_bytes = blockstats->rd_bytes;
stats->wr_req = blockstats->wr_req;
stats->wr_bytes = blockstats->wr_bytes;
/* qemu doesn't report the error count */
stats->errs = -1;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
VIR_FREE(blockstats);
return ret;
}
static int
qemuDomainBlockStatsFlags(virDomainPtr dom,
const char *path,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuBlockStatsPtr blockstats = NULL;
int nstats;
int ret = -1;
VIR_DEBUG("params=%p, flags=%x", params, flags);
virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
/* We don't return strings, and thus trivially support this flag. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainBlockStatsFlagsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if ((nstats = qemuDomainBlocksStatsGather(driver, vm, path,
&blockstats)) < 0)
goto endjob;
/* return count of supported stats */
if (*nparams == 0) {
*nparams = nstats;
ret = 0;
goto endjob;
}
nstats = 0;
#define QEMU_BLOCK_STATS_ASSIGN_PARAM(VAR, NAME) \
if (nstats < *nparams && (blockstats->VAR) != -1) { \
if (virTypedParameterAssign(params + nstats, NAME, \
VIR_TYPED_PARAM_LLONG, (blockstats->VAR)) < 0) \
goto endjob; \
nstats++; \
}
QEMU_BLOCK_STATS_ASSIGN_PARAM(wr_bytes, VIR_DOMAIN_BLOCK_STATS_WRITE_BYTES);
QEMU_BLOCK_STATS_ASSIGN_PARAM(wr_req, VIR_DOMAIN_BLOCK_STATS_WRITE_REQ);
QEMU_BLOCK_STATS_ASSIGN_PARAM(rd_bytes, VIR_DOMAIN_BLOCK_STATS_READ_BYTES);
QEMU_BLOCK_STATS_ASSIGN_PARAM(rd_req, VIR_DOMAIN_BLOCK_STATS_READ_REQ);
QEMU_BLOCK_STATS_ASSIGN_PARAM(flush_req, VIR_DOMAIN_BLOCK_STATS_FLUSH_REQ);
QEMU_BLOCK_STATS_ASSIGN_PARAM(wr_total_times,
VIR_DOMAIN_BLOCK_STATS_WRITE_TOTAL_TIMES);
QEMU_BLOCK_STATS_ASSIGN_PARAM(rd_total_times,
VIR_DOMAIN_BLOCK_STATS_READ_TOTAL_TIMES);
QEMU_BLOCK_STATS_ASSIGN_PARAM(flush_total_times,
VIR_DOMAIN_BLOCK_STATS_FLUSH_TOTAL_TIMES);
#undef QEMU_BLOCK_STATS_ASSIGN_PARAM
ret = 0;
*nparams = nstats;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(blockstats);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainInterfaceStats(virDomainPtr dom,
const char *path,
virDomainInterfaceStatsPtr stats)
{
virDomainObjPtr vm;
virDomainNetDefPtr net = NULL;
size_t i;
int ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainInterfaceStatsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
/* Check the path is one of the domain's network interfaces. */
for (i = 0; i < vm->def->nnets; i++) {
if (STREQ_NULLABLE(vm->def->nets[i]->ifname, path)) {
net = vm->def->nets[i];
break;
}
}
if (!net) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path, '%s' is not a known interface"), path);
goto cleanup;
}
if (net->type == VIR_DOMAIN_NET_TYPE_VHOSTUSER) {
if (virNetDevOpenvswitchInterfaceStats(path, stats) < 0)
goto cleanup;
} else {
if (virNetDevTapInterfaceStats(path, stats) < 0)
goto cleanup;
}
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainSetInterfaceParameters(virDomainPtr dom,
const char *device,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
size_t i;
virDomainObjPtr vm = NULL;
virDomainDefPtr def;
virDomainDefPtr persistentDef;
int ret = -1;
virDomainNetDefPtr net = NULL, persistentNet = NULL;
virNetDevBandwidthPtr bandwidth = NULL, newBandwidth = NULL;
virQEMUDriverConfigPtr cfg = NULL;
bool inboundSpecified = false, outboundSpecified = false;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_BANDWIDTH_IN_AVERAGE,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BANDWIDTH_IN_PEAK,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BANDWIDTH_IN_BURST,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BANDWIDTH_IN_FLOOR,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BANDWIDTH_OUT_AVERAGE,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BANDWIDTH_OUT_PEAK,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BANDWIDTH_OUT_BURST,
VIR_TYPED_PARAM_UINT,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetInterfaceParametersEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (def &&
!(net = virDomainNetFind(vm->def, device))) {
virReportError(VIR_ERR_INVALID_ARG,
_("Can't find device %s"), device);
goto endjob;
}
if (persistentDef &&
!(persistentNet = virDomainNetFind(persistentDef, device))) {
virReportError(VIR_ERR_INVALID_ARG,
_("Can't find device %s"), device);
goto endjob;
}
if ((VIR_ALLOC(bandwidth) < 0) ||
(VIR_ALLOC(bandwidth->in) < 0) ||
(VIR_ALLOC(bandwidth->out) < 0))
goto endjob;
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_BANDWIDTH_IN_AVERAGE)) {
bandwidth->in->average = params[i].value.ui;
inboundSpecified = true;
} else if (STREQ(param->field, VIR_DOMAIN_BANDWIDTH_IN_PEAK)) {
bandwidth->in->peak = params[i].value.ui;
} else if (STREQ(param->field, VIR_DOMAIN_BANDWIDTH_IN_BURST)) {
bandwidth->in->burst = params[i].value.ui;
} else if (STREQ(param->field, VIR_DOMAIN_BANDWIDTH_IN_FLOOR)) {
bandwidth->in->floor = params[i].value.ui;
inboundSpecified = true;
} else if (STREQ(param->field, VIR_DOMAIN_BANDWIDTH_OUT_AVERAGE)) {
bandwidth->out->average = params[i].value.ui;
outboundSpecified = true;
} else if (STREQ(param->field, VIR_DOMAIN_BANDWIDTH_OUT_PEAK)) {
bandwidth->out->peak = params[i].value.ui;
} else if (STREQ(param->field, VIR_DOMAIN_BANDWIDTH_OUT_BURST)) {
bandwidth->out->burst = params[i].value.ui;
}
}
/* average or floor are mandatory, peak and burst are optional.
* So if no average or floor is given, we free inbound/outbound
* here which causes inbound/outbound to not be set. */
if (!bandwidth->in->average && !bandwidth->in->floor)
VIR_FREE(bandwidth->in);
if (!bandwidth->out->average)
VIR_FREE(bandwidth->out);
if (net) {
if (VIR_ALLOC(newBandwidth) < 0)
goto endjob;
/* virNetDevBandwidthSet() will clear any previous value of
* bandwidth parameters, so merge with old bandwidth parameters
* here to prevent them from being lost. */
if (bandwidth->in ||
(!inboundSpecified && net->bandwidth && net->bandwidth->in)) {
if (VIR_ALLOC(newBandwidth->in) < 0)
goto endjob;
memcpy(newBandwidth->in,
bandwidth->in ? bandwidth->in : net->bandwidth->in,
sizeof(*newBandwidth->in));
}
if (bandwidth->out ||
(!outboundSpecified && net->bandwidth && net->bandwidth->out)) {
if (VIR_ALLOC(newBandwidth->out) < 0)
goto endjob;
memcpy(newBandwidth->out,
bandwidth->out ? bandwidth->out : net->bandwidth->out,
sizeof(*newBandwidth->out));
}
if (!networkBandwidthChangeAllowed(net, newBandwidth))
goto endjob;
if (virNetDevBandwidthSet(net->ifname, newBandwidth, false) < 0 ||
networkBandwidthUpdate(net, newBandwidth) < 0) {
ignore_value(virNetDevBandwidthSet(net->ifname,
net->bandwidth,
false));
goto endjob;
}
virNetDevBandwidthFree(net->bandwidth);
if (newBandwidth->in || newBandwidth->out) {
net->bandwidth = newBandwidth;
newBandwidth = NULL;
} else {
net->bandwidth = NULL;
}
if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) {
virNetDevBandwidthFree(net->data.network.actual->bandwidth);
if (virNetDevBandwidthCopy(&net->data.network.actual->bandwidth,
net->bandwidth) < 0)
goto endjob;
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
goto endjob;
}
if (persistentNet) {
if (!persistentNet->bandwidth) {
persistentNet->bandwidth = bandwidth;
bandwidth = NULL;
} else {
if (bandwidth->in) {
VIR_FREE(persistentNet->bandwidth->in);
persistentNet->bandwidth->in = bandwidth->in;
bandwidth->in = NULL;
} else if (inboundSpecified) {
VIR_FREE(persistentNet->bandwidth->in);
}
if (bandwidth->out) {
VIR_FREE(persistentNet->bandwidth->out);
persistentNet->bandwidth->out = bandwidth->out;
bandwidth->out = NULL;
} else if (outboundSpecified) {
VIR_FREE(persistentNet->bandwidth->out);
}
}
if (virDomainSaveConfig(cfg->configDir, driver->caps, persistentDef) < 0)
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virNetDevBandwidthFree(bandwidth);
virNetDevBandwidthFree(newBandwidth);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetInterfaceParameters(virDomainPtr dom,
const char *device,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
size_t i;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainNetDefPtr net = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainGetInterfaceParametersEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!(def = virDomainObjGetOneDef(vm, flags)))
goto cleanup;
if ((*nparams) == 0) {
*nparams = QEMU_NB_BANDWIDTH_PARAM;
ret = 0;
goto cleanup;
}
net = virDomainNetFind(def, device);
if (!net) {
virReportError(VIR_ERR_INVALID_ARG,
_("Can't find device %s"), device);
goto cleanup;
}
for (i = 0; i < *nparams && i < QEMU_NB_BANDWIDTH_PARAM; i++) {
switch (i) {
case 0: /* inbound.average */
if (virTypedParameterAssign(&params[i],
VIR_DOMAIN_BANDWIDTH_IN_AVERAGE,
VIR_TYPED_PARAM_UINT, 0) < 0)
goto cleanup;
if (net->bandwidth && net->bandwidth->in)
params[i].value.ui = net->bandwidth->in->average;
break;
case 1: /* inbound.peak */
if (virTypedParameterAssign(&params[i],
VIR_DOMAIN_BANDWIDTH_IN_PEAK,
VIR_TYPED_PARAM_UINT, 0) < 0)
goto cleanup;
if (net->bandwidth && net->bandwidth->in)
params[i].value.ui = net->bandwidth->in->peak;
break;
case 2: /* inbound.burst */
if (virTypedParameterAssign(&params[i],
VIR_DOMAIN_BANDWIDTH_IN_BURST,
VIR_TYPED_PARAM_UINT, 0) < 0)
goto cleanup;
if (net->bandwidth && net->bandwidth->in)
params[i].value.ui = net->bandwidth->in->burst;
break;
case 3: /* inbound.floor */
if (virTypedParameterAssign(&params[i],
VIR_DOMAIN_BANDWIDTH_IN_FLOOR,
VIR_TYPED_PARAM_UINT, 0) < 0)
goto cleanup;
if (net->bandwidth && net->bandwidth->in)
params[i].value.ui = net->bandwidth->in->floor;
break;
case 4: /* outbound.average */
if (virTypedParameterAssign(&params[i],
VIR_DOMAIN_BANDWIDTH_OUT_AVERAGE,
VIR_TYPED_PARAM_UINT, 0) < 0)
goto cleanup;
if (net->bandwidth && net->bandwidth->out)
params[i].value.ui = net->bandwidth->out->average;
break;
case 5: /* outbound.peak */
if (virTypedParameterAssign(&params[i],
VIR_DOMAIN_BANDWIDTH_OUT_PEAK,
VIR_TYPED_PARAM_UINT, 0) < 0)
goto cleanup;
if (net->bandwidth && net->bandwidth->out)
params[i].value.ui = net->bandwidth->out->peak;
break;
case 6: /* outbound.burst */
if (virTypedParameterAssign(&params[i],
VIR_DOMAIN_BANDWIDTH_OUT_BURST,
VIR_TYPED_PARAM_UINT, 0) < 0)
goto cleanup;
if (net->bandwidth && net->bandwidth->out)
params[i].value.ui = net->bandwidth->out->burst;
break;
/* coverity[dead_error_begin] */
default:
break;
/* should not hit here */
}
}
if (*nparams > QEMU_NB_BANDWIDTH_PARAM)
*nparams = QEMU_NB_BANDWIDTH_PARAM;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* This functions assumes that job QEMU_JOB_QUERY is started by a caller */
static int
qemuDomainMemoryStatsInternal(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainMemoryStatPtr stats,
unsigned int nr_stats)
{
int ret = -1;
long rss;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
return -1;
}
if (vm->def->memballoon &&
vm->def->memballoon->model == VIR_DOMAIN_MEMBALLOON_MODEL_VIRTIO) {
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetMemoryStats(qemuDomainGetMonitor(vm),
vm->def->memballoon, stats, nr_stats);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
if (ret < 0 || ret >= nr_stats)
return ret;
} else {
ret = 0;
}
if (qemuGetProcessInfo(NULL, NULL, &rss, vm->pid, 0) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("cannot get RSS for domain"));
} else {
stats[ret].tag = VIR_DOMAIN_MEMORY_STAT_RSS;
stats[ret].val = rss;
ret++;
}
return ret;
}
static int
qemuDomainMemoryStats(virDomainPtr dom,
virDomainMemoryStatPtr stats,
unsigned int nr_stats,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainMemoryStatsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
ret = qemuDomainMemoryStatsInternal(driver, vm, stats, nr_stats);
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainBlockPeek(virDomainPtr dom,
const char *path,
unsigned long long offset, size_t size,
void *buffer,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int fd = -1, ret = -1;
const char *actual;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainBlockPeekEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
/* Check the path belongs to this domain. */
if (!(actual = virDomainDiskPathByName(vm->def, path))) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path '%s'"), path);
goto cleanup;
}
path = actual;
fd = qemuOpenFile(driver, vm, path, O_RDONLY, NULL, NULL);
if (fd < 0)
goto cleanup;
/* Seek and read. */
/* NB. Because we configure with AC_SYS_LARGEFILE, off_t should
* be 64 bits on all platforms.
*/
if (lseek(fd, offset, SEEK_SET) == (off_t) -1 ||
saferead(fd, buffer, size) == (ssize_t) -1) {
virReportSystemError(errno,
_("%s: failed to seek or read"), path);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainMemoryPeek(virDomainPtr dom,
unsigned long long offset, size_t size,
void *buffer,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
char *tmp = NULL;
int fd = -1, ret = -1;
qemuDomainObjPrivatePtr priv;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_MEMORY_VIRTUAL | VIR_MEMORY_PHYSICAL, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainMemoryPeekEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (flags != VIR_MEMORY_VIRTUAL && flags != VIR_MEMORY_PHYSICAL) {
virReportError(VIR_ERR_INVALID_ARG,
"%s", _("flags parameter must be VIR_MEMORY_VIRTUAL or VIR_MEMORY_PHYSICAL"));
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (virAsprintf(&tmp, "%s/qemu.mem.XXXXXX", cfg->cacheDir) < 0)
goto endjob;
/* Create a temporary filename. */
if ((fd = mkostemp(tmp, O_CLOEXEC)) == -1) {
virReportSystemError(errno,
_("mkostemp(\"%s\") failed"), tmp);
goto endjob;
}
qemuSecuritySetSavedStateLabel(driver->securityManager, vm->def, tmp);
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
if (flags == VIR_MEMORY_VIRTUAL) {
if (qemuMonitorSaveVirtualMemory(priv->mon, offset, size, tmp) < 0) {
ignore_value(qemuDomainObjExitMonitor(driver, vm));
goto endjob;
}
} else {
if (qemuMonitorSavePhysicalMemory(priv->mon, offset, size, tmp) < 0) {
ignore_value(qemuDomainObjExitMonitor(driver, vm));
goto endjob;
}
}
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
/* Read the memory file into buffer. */
if (saferead(fd, buffer, size) == (ssize_t) -1) {
virReportSystemError(errno,
_("failed to read temporary file "
"created with template %s"), tmp);
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FORCE_CLOSE(fd);
if (tmp)
unlink(tmp);
VIR_FREE(tmp);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
/**
* @driver: qemu driver data
* @cfg: driver configuration data
* @vm: domain object
* @src: storage source data
* @ret_fd: pointer to return open'd file descriptor
* @ret_sb: pointer to return stat buffer (local or remote)
*
* For local storage, open the file using qemuOpenFile and then use
* fstat() to grab the stat struct data for the caller.
*
* For remote storage, attempt to access the file and grab the stat
* struct data if the remote connection supports it.
*
* Returns 0 on success with @ret_fd and @ret_sb populated, -1 on failure
*/
static int
qemuDomainStorageOpenStat(virQEMUDriverPtr driver,
virQEMUDriverConfigPtr cfg,
virDomainObjPtr vm,
virStorageSourcePtr src,
int *ret_fd,
struct stat *ret_sb)
{
if (virStorageSourceIsLocalStorage(src)) {
if ((*ret_fd = qemuOpenFile(driver, vm, src->path, O_RDONLY,
NULL, NULL)) < 0)
return -1;
if (fstat(*ret_fd, ret_sb) < 0) {
virReportSystemError(errno, _("cannot stat file '%s'"), src->path);
VIR_FORCE_CLOSE(*ret_fd);
return -1;
}
} else {
if (virStorageFileInitAs(src, cfg->user, cfg->group) < 0)
return -1;
if (virStorageFileStat(src, ret_sb) < 0) {
virStorageFileDeinit(src);
virReportSystemError(errno, _("failed to stat remote file '%s'"),
NULLSTR(src->path));
return -1;
}
}
return 0;
}
/**
* @src: storage source data
* @fd: file descriptor to close for local
*
* If local, then just close the file descriptor.
* else remote, then tear down the storage driver backend connection.
*/
static void
qemuDomainStorageCloseStat(virStorageSourcePtr src,
int *fd)
{
if (virStorageSourceIsLocalStorage(src))
VIR_FORCE_CLOSE(*fd);
else
virStorageFileDeinit(src);
}
static int
qemuDomainStorageUpdatePhysical(virQEMUDriverPtr driver,
virQEMUDriverConfigPtr cfg,
virDomainObjPtr vm,
virStorageSourcePtr src)
{
int ret;
int fd = -1;
struct stat sb;
if (virStorageSourceIsEmpty(src))
return 0;
if (qemuDomainStorageOpenStat(driver, cfg, vm, src, &fd, &sb) < 0)
return -1;
ret = virStorageSourceUpdatePhysicalSize(src, fd, &sb);
qemuDomainStorageCloseStat(src, &fd);
return ret;
}
/**
* @driver: qemu driver data
* @cfg: driver configuration data
* @vm: domain object
* @src: storage source data
*
* Refresh the capacity and allocation limits of a given storage source.
*
* Assumes that the caller has already obtained a domain job and only
* called for an offline domain. Being offline is particularly important
* since reading a file while qemu is writing it risks the reader seeing
* bogus data or avoiding opening a file in order to get stat data.
*
* We always want to check current on-disk statistics (as users have been
* known to change offline images behind our backs).
*
* For read-only disks, nothing should be changing unless the user has
* requested a block-commit action. For read-write disks, we know some
* special cases: capacity should not change without a block-resize (where
* capacity is the only stat that requires reading a file, and even then,
* only for non-raw files); and physical size of a raw image or of a
* block device should likewise not be changing without block-resize.
* On the other hand, allocation of a raw file can change (if the file
* is sparse, but the amount of sparseness changes due to writes or
* punching holes), and physical size of a non-raw file can change.
*
* Returns 0 on success, -1 on failure
*/
static int
qemuStorageLimitsRefresh(virQEMUDriverPtr driver,
virQEMUDriverConfigPtr cfg,
virDomainObjPtr vm,
virStorageSourcePtr src)
{
int ret = -1;
int fd = -1;
struct stat sb;
char *buf = NULL;
ssize_t len;
if (qemuDomainStorageOpenStat(driver, cfg, vm, src, &fd, &sb) < 0)
goto cleanup;
if (virStorageSourceIsLocalStorage(src)) {
if ((len = virFileReadHeaderFD(fd, VIR_STORAGE_MAX_HEADER, &buf)) < 0) {
virReportSystemError(errno, _("cannot read header '%s'"),
src->path);
goto cleanup;
}
} else {
if ((len = virStorageFileReadHeader(src, VIR_STORAGE_MAX_HEADER,
&buf)) < 0)
goto cleanup;
}
if (virStorageSourceUpdateBackingSizes(src, fd, &sb) < 0)
goto cleanup;
if (virStorageSourceUpdateCapacity(src, buf, len,
cfg->allowDiskFormatProbing) < 0)
goto cleanup;
/* If guest is not using raw disk format and is on a host block
* device, then leave the value unspecified, so caller knows to
* query the highest allocated extent from QEMU
*/
if (virStorageSourceGetActualType(src) == VIR_STORAGE_TYPE_BLOCK &&
src->format != VIR_STORAGE_FILE_RAW &&
S_ISBLK(sb.st_mode))
src->allocation = 0;
ret = 0;
cleanup:
VIR_FREE(buf);
qemuDomainStorageCloseStat(src, &fd);
return ret;
}
static int
qemuDomainGetBlockInfo(virDomainPtr dom,
const char *path,
virDomainBlockInfoPtr info,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virDomainDiskDefPtr disk;
virQEMUDriverConfigPtr cfg = NULL;
int rc;
virHashTablePtr stats = NULL;
qemuBlockStats *entry;
char *alias = NULL;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainGetBlockInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!(disk = virDomainDiskByName(vm->def, path, false))) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path %s not assigned to domain"), path);
goto endjob;
}
if (virStorageSourceIsEmpty(disk->src)) {
virReportError(VIR_ERR_INVALID_ARG,
_("disk '%s' does not currently have a source assigned"),
path);
goto endjob;
}
/* for inactive domains we have to peek into the files */
if (!virDomainObjIsActive(vm)) {
if ((qemuStorageLimitsRefresh(driver, cfg, vm, disk->src)) < 0)
goto endjob;
info->capacity = disk->src->capacity;
info->allocation = disk->src->allocation;
info->physical = disk->src->physical;
ret = 0;
goto endjob;
}
if (!disk->info.alias ||
!(alias = qemuDomainStorageAlias(disk->info.alias, 0))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("missing disk device alias name for %s"), disk->dst);
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorGetAllBlockStatsInfo(qemuDomainGetMonitor(vm),
&stats, false);
if (rc >= 0)
rc = qemuMonitorBlockStatsUpdateCapacity(qemuDomainGetMonitor(vm),
stats, false);
if (qemuDomainObjExitMonitor(driver, vm) < 0 || rc < 0)
goto endjob;
if (!(entry = virHashLookup(stats, alias))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("failed to gather stats for disk '%s'"), disk->dst);
goto endjob;
}
if (!entry->wr_highest_offset_valid) {
info->allocation = entry->physical;
} else {
if (virStorageSourceGetActualType(disk->src) == VIR_STORAGE_TYPE_FILE &&
disk->src->format == VIR_STORAGE_FILE_QCOW2)
info->allocation = entry->physical;
else
info->allocation = entry->wr_highest_offset;
}
/* Unlike GetStatsBlock, this API has defined the expected return values
* for allocation and physical slightly differently.
*
* Having a zero for either or if they're the same is an indication that
* there's a sparse file backing this device. In this case, we'll force
* the setting of physical based on the on disk file size.
*
* Additionally, if qemu hasn't written to the file yet, then set the
* allocation to whatever qemu returned for physical (e.g. the "actual-
* size" from the json query) as that will match the expected allocation
* value for this API. */
if (entry->physical == 0 || info->allocation == 0 ||
info->allocation == entry->physical) {
info->allocation = entry->physical;
if (info->allocation == 0)
info->allocation = entry->physical;
if (qemuDomainStorageUpdatePhysical(driver, cfg, vm, disk->src) == 0) {
info->physical = disk->src->physical;
} else {
virResetLastError();
info->physical = entry->physical;
}
} else {
info->physical = entry->physical;
}
info->capacity = entry->capacity;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(alias);
virHashFree(stats);
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuConnectDomainEventRegister(virConnectPtr conn,
virConnectDomainEventCallback callback,
void *opaque,
virFreeCallback freecb)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
if (virConnectDomainEventRegisterEnsureACL(conn) < 0)
goto cleanup;
if (virDomainEventStateRegister(conn,
driver->domainEventState,
callback, opaque, freecb) < 0)
goto cleanup;
ret = 0;
cleanup:
return ret;
}
static int
qemuConnectDomainEventDeregister(virConnectPtr conn,
virConnectDomainEventCallback callback)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
if (virConnectDomainEventDeregisterEnsureACL(conn) < 0)
goto cleanup;
if (virDomainEventStateDeregister(conn,
driver->domainEventState,
callback) < 0)
goto cleanup;
ret = 0;
cleanup:
return ret;
}
static int
qemuConnectDomainEventRegisterAny(virConnectPtr conn,
virDomainPtr dom,
int eventID,
virConnectDomainEventGenericCallback callback,
void *opaque,
virFreeCallback freecb)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
if (virConnectDomainEventRegisterAnyEnsureACL(conn) < 0)
goto cleanup;
if (virDomainEventStateRegisterID(conn,
driver->domainEventState,
dom, eventID,
callback, opaque, freecb, &ret) < 0)
ret = -1;
cleanup:
return ret;
}
static int
qemuConnectDomainEventDeregisterAny(virConnectPtr conn,
int callbackID)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
if (virConnectDomainEventDeregisterAnyEnsureACL(conn) < 0)
goto cleanup;
if (virObjectEventStateDeregisterID(conn,
driver->domainEventState,
callbackID) < 0)
goto cleanup;
ret = 0;
cleanup:
return ret;
}
/*******************************************************************
* Migration Protocol Version 2
*******************************************************************/
/* Prepare is the first step, and it runs on the destination host.
*
* This version starts an empty VM listening on a localhost TCP port, and
* sets up the corresponding virStream to handle the incoming data.
*/
static int
qemuDomainMigratePrepareTunnel(virConnectPtr dconn,
virStreamPtr st,
unsigned long flags,
const char *dname,
unsigned long resource ATTRIBUTE_UNUSED,
const char *dom_xml)
{
virQEMUDriverPtr driver = dconn->privateData;
virDomainDefPtr def = NULL;
char *origname = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!(flags & VIR_MIGRATE_TUNNELLED)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("PrepareTunnel called but no TUNNELLED flag set"));
goto cleanup;
}
if (virLockManagerPluginUsesState(driver->lockManager)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot use migrate v2 protocol with lock manager %s"),
virLockManagerPluginGetName(driver->lockManager));
goto cleanup;
}
if (!(def = qemuMigrationPrepareDef(driver, dom_xml, dname, &origname)))
goto cleanup;
if (virDomainMigratePrepareTunnelEnsureACL(dconn, def) < 0)
goto cleanup;
ret = qemuMigrationPrepareTunnel(driver, dconn,
NULL, 0, NULL, NULL, /* No cookies in v2 */
st, &def, origname, flags);
cleanup:
VIR_FREE(origname);
virDomainDefFree(def);
return ret;
}
/* Prepare is the first step, and it runs on the destination host.
*
* This starts an empty VM listening on a TCP port.
*/
static int ATTRIBUTE_NONNULL(5)
qemuDomainMigratePrepare2(virConnectPtr dconn,
char **cookie ATTRIBUTE_UNUSED,
int *cookielen ATTRIBUTE_UNUSED,
const char *uri_in,
char **uri_out,
unsigned long flags,
const char *dname,
unsigned long resource ATTRIBUTE_UNUSED,
const char *dom_xml)
{
virQEMUDriverPtr driver = dconn->privateData;
virDomainDefPtr def = NULL;
char *origname = NULL;
qemuMigrationCompressionPtr compression = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (flags & VIR_MIGRATE_TUNNELLED) {
/* this is a logical error; we never should have gotten here with
* VIR_MIGRATE_TUNNELLED set
*/
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Tunnelled migration requested but invalid "
"RPC method called"));
goto cleanup;
}
if (!(compression = qemuMigrationCompressionParse(NULL, 0, flags)))
goto cleanup;
if (virLockManagerPluginUsesState(driver->lockManager)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot use migrate v2 protocol with lock manager %s"),
virLockManagerPluginGetName(driver->lockManager));
goto cleanup;
}
if (!(def = qemuMigrationPrepareDef(driver, dom_xml, dname, &origname)))
goto cleanup;
if (virDomainMigratePrepare2EnsureACL(dconn, def) < 0)
goto cleanup;
/* Do not use cookies in v2 protocol, since the cookie
* length was not sufficiently large, causing failures
* migrating between old & new libvirtd
*/
ret = qemuMigrationPrepareDirect(driver, dconn,
NULL, 0, NULL, NULL, /* No cookies */
uri_in, uri_out,
&def, origname, NULL, 0, NULL, 0,
compression, flags);
cleanup:
VIR_FREE(compression);
VIR_FREE(origname);
virDomainDefFree(def);
return ret;
}
/* Perform is the second step, and it runs on the source host. */
static int
qemuDomainMigratePerform(virDomainPtr dom,
const char *cookie,
int cookielen,
const char *uri,
unsigned long flags,
const char *dname,
unsigned long resource)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
const char *dconnuri = NULL;
qemuMigrationCompressionPtr compression = NULL;
qemuMonitorMigrationParams migParams = { 0 };
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (virLockManagerPluginUsesState(driver->lockManager)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot use migrate v2 protocol with lock manager %s"),
virLockManagerPluginGetName(driver->lockManager));
goto cleanup;
}
if (!(compression = qemuMigrationCompressionParse(NULL, 0, flags)))
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainMigratePerformEnsureACL(dom->conn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
goto cleanup;
}
if (flags & VIR_MIGRATE_PEER2PEER) {
dconnuri = uri;
uri = NULL;
}
/* Do not output cookies in v2 protocol, since the cookie
* length was not sufficiently large, causing failures
* migrating between old & new libvirtd.
*
* Consume any cookie we were able to decode though
*/
ret = qemuMigrationPerform(driver, dom->conn, vm, NULL,
NULL, dconnuri, uri, NULL, NULL, 0, NULL, 0,
compression, &migParams, cookie, cookielen,
NULL, NULL, /* No output cookies in v2 */
flags, dname, resource, false);
cleanup:
qemuMigrationParamsClear(&migParams);
VIR_FREE(compression);
return ret;
}
/* Finish is the third and final step, and it runs on the destination host. */
static virDomainPtr
qemuDomainMigrateFinish2(virConnectPtr dconn,
const char *dname,
const char *cookie ATTRIBUTE_UNUSED,
int cookielen ATTRIBUTE_UNUSED,
const char *uri ATTRIBUTE_UNUSED,
unsigned long flags,
int retcode)
{
virQEMUDriverPtr driver = dconn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
vm = virDomainObjListFindByName(driver->domains, dname);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching name '%s'"), dname);
qemuMigrationErrorReport(driver, dname);
goto cleanup;
}
if (virDomainMigrateFinish2EnsureACL(dconn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
goto cleanup;
}
/* Do not use cookies in v2 protocol, since the cookie
* length was not sufficiently large, causing failures
* migrating between old & new libvirtd
*/
dom = qemuMigrationFinish(driver, dconn, vm,
NULL, 0, NULL, NULL, /* No cookies */
flags, retcode, false);
cleanup:
return dom;
}
/*******************************************************************
* Migration Protocol Version 3
*******************************************************************/
static char *
qemuDomainMigrateBegin3(virDomainPtr domain,
const char *xmlin,
char **cookieout,
int *cookieoutlen,
unsigned long flags,
const char *dname,
unsigned long resource ATTRIBUTE_UNUSED)
{
virDomainObjPtr vm;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
if (!(vm = qemuDomObjFromDomain(domain)))
return NULL;
if (virDomainMigrateBegin3EnsureACL(domain->conn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
return NULL;
}
return qemuMigrationBegin(domain->conn, vm, xmlin, dname,
cookieout, cookieoutlen, 0, NULL, flags);
}
static char *
qemuDomainMigrateBegin3Params(virDomainPtr domain,
virTypedParameterPtr params,
int nparams,
char **cookieout,
int *cookieoutlen,
unsigned int flags)
{
const char *xmlin = NULL;
const char *dname = NULL;
const char **migrate_disks = NULL;
int nmigrate_disks;
char *ret = NULL;
virDomainObjPtr vm;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
if (virTypedParamsValidate(params, nparams, QEMU_MIGRATION_PARAMETERS) < 0)
goto cleanup;
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_XML,
&xmlin) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME,
&dname) < 0)
goto cleanup;
nmigrate_disks = virTypedParamsGetStringList(params, nparams,
VIR_MIGRATE_PARAM_MIGRATE_DISKS,
&migrate_disks);
if (nmigrate_disks < 0)
goto cleanup;
if (!(vm = qemuDomObjFromDomain(domain)))
goto cleanup;
if (virDomainMigrateBegin3ParamsEnsureACL(domain->conn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
goto cleanup;
}
ret = qemuMigrationBegin(domain->conn, vm, xmlin, dname,
cookieout, cookieoutlen,
nmigrate_disks, migrate_disks, flags);
cleanup:
VIR_FREE(migrate_disks);
return ret;
}
static int
qemuDomainMigratePrepare3(virConnectPtr dconn,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
const char *uri_in,
char **uri_out,
unsigned long flags,
const char *dname,
unsigned long resource ATTRIBUTE_UNUSED,
const char *dom_xml)
{
virQEMUDriverPtr driver = dconn->privateData;
virDomainDefPtr def = NULL;
char *origname = NULL;
qemuMigrationCompressionPtr compression = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (flags & VIR_MIGRATE_TUNNELLED) {
/* this is a logical error; we never should have gotten here with
* VIR_MIGRATE_TUNNELLED set
*/
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Tunnelled migration requested but invalid "
"RPC method called"));
goto cleanup;
}
if (!(compression = qemuMigrationCompressionParse(NULL, 0, flags)))
goto cleanup;
if (!(def = qemuMigrationPrepareDef(driver, dom_xml, dname, &origname)))
goto cleanup;
if (virDomainMigratePrepare3EnsureACL(dconn, def) < 0)
goto cleanup;
ret = qemuMigrationPrepareDirect(driver, dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
uri_in, uri_out,
&def, origname, NULL, 0, NULL, 0,
compression, flags);
cleanup:
VIR_FREE(compression);
VIR_FREE(origname);
virDomainDefFree(def);
return ret;
}
static int
qemuDomainMigratePrepare3Params(virConnectPtr dconn,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
char **uri_out,
unsigned int flags)
{
virQEMUDriverPtr driver = dconn->privateData;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
virDomainDefPtr def = NULL;
const char *dom_xml = NULL;
const char *dname = NULL;
const char *uri_in = NULL;
const char *listenAddress = cfg->migrationAddress;
int nbdPort = 0;
int nmigrate_disks;
const char **migrate_disks = NULL;
char *origname = NULL;
qemuMigrationCompressionPtr compression = NULL;
int ret = -1;
virCheckFlagsGoto(QEMU_MIGRATION_FLAGS, cleanup);
if (virTypedParamsValidate(params, nparams, QEMU_MIGRATION_PARAMETERS) < 0)
goto cleanup;
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_XML,
&dom_xml) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME,
&dname) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_URI,
&uri_in) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_LISTEN_ADDRESS,
&listenAddress) < 0 ||
virTypedParamsGetInt(params, nparams,
VIR_MIGRATE_PARAM_DISKS_PORT,
&nbdPort) < 0)
goto cleanup;
nmigrate_disks = virTypedParamsGetStringList(params, nparams,
VIR_MIGRATE_PARAM_MIGRATE_DISKS,
&migrate_disks);
if (nmigrate_disks < 0)
goto cleanup;
if (!(compression = qemuMigrationCompressionParse(params, nparams, flags)))
goto cleanup;
if (flags & VIR_MIGRATE_TUNNELLED) {
/* this is a logical error; we never should have gotten here with
* VIR_MIGRATE_TUNNELLED set
*/
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Tunnelled migration requested but invalid "
"RPC method called"));
goto cleanup;
}
if (!(def = qemuMigrationPrepareDef(driver, dom_xml, dname, &origname)))
goto cleanup;
if (virDomainMigratePrepare3ParamsEnsureACL(dconn, def) < 0)
goto cleanup;
ret = qemuMigrationPrepareDirect(driver, dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
uri_in, uri_out,
&def, origname, listenAddress,
nmigrate_disks, migrate_disks, nbdPort,
compression, flags);
cleanup:
VIR_FREE(compression);
VIR_FREE(migrate_disks);
VIR_FREE(origname);
virDomainDefFree(def);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainMigratePrepareTunnel3(virConnectPtr dconn,
virStreamPtr st,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned long flags,
const char *dname,
unsigned long resource ATTRIBUTE_UNUSED,
const char *dom_xml)
{
virQEMUDriverPtr driver = dconn->privateData;
virDomainDefPtr def = NULL;
char *origname = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!(flags & VIR_MIGRATE_TUNNELLED)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("PrepareTunnel called but no TUNNELLED flag set"));
goto cleanup;
}
if (!(def = qemuMigrationPrepareDef(driver, dom_xml, dname, &origname)))
goto cleanup;
if (virDomainMigratePrepareTunnel3EnsureACL(dconn, def) < 0)
goto cleanup;
ret = qemuMigrationPrepareTunnel(driver, dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
st, &def, origname, flags);
cleanup:
VIR_FREE(origname);
virDomainDefFree(def);
return ret;
}
static int
qemuDomainMigratePrepareTunnel3Params(virConnectPtr dconn,
virStreamPtr st,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned int flags)
{
virQEMUDriverPtr driver = dconn->privateData;
virDomainDefPtr def = NULL;
const char *dom_xml = NULL;
const char *dname = NULL;
char *origname = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (virTypedParamsValidate(params, nparams, QEMU_MIGRATION_PARAMETERS) < 0)
return -1;
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_XML,
&dom_xml) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME,
&dname) < 0)
return -1;
if (!(flags & VIR_MIGRATE_TUNNELLED)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("PrepareTunnel called but no TUNNELLED flag set"));
goto cleanup;
}
if (!(def = qemuMigrationPrepareDef(driver, dom_xml, dname, &origname)))
goto cleanup;
if (virDomainMigratePrepareTunnel3ParamsEnsureACL(dconn, def) < 0)
goto cleanup;
ret = qemuMigrationPrepareTunnel(driver, dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
st, &def, origname, flags);
cleanup:
VIR_FREE(origname);
virDomainDefFree(def);
return ret;
}
static int
qemuDomainMigratePerform3(virDomainPtr dom,
const char *xmlin,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
const char *dconnuri,
const char *uri,
unsigned long flags,
const char *dname,
unsigned long resource)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuMigrationCompressionPtr compression = NULL;
qemuMonitorMigrationParams migParams = { 0 };
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!(compression = qemuMigrationCompressionParse(NULL, 0, flags)))
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainMigratePerform3EnsureACL(dom->conn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
goto cleanup;
}
ret = qemuMigrationPerform(driver, dom->conn, vm, xmlin, NULL,
dconnuri, uri, NULL, NULL, 0, NULL, 0,
compression, &migParams,
cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, dname, resource, true);
cleanup:
qemuMigrationParamsClear(&migParams);
VIR_FREE(compression);
return ret;
}
static int
qemuDomainMigratePerform3Params(virDomainPtr dom,
const char *dconnuri,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
const char *dom_xml = NULL;
const char *persist_xml = NULL;
const char *dname = NULL;
const char *uri = NULL;
const char *graphicsuri = NULL;
const char *listenAddress = NULL;
int nmigrate_disks;
const char **migrate_disks = NULL;
unsigned long long bandwidth = 0;
int nbdPort = 0;
qemuMigrationCompressionPtr compression = NULL;
qemuMonitorMigrationParamsPtr migParams = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (virTypedParamsValidate(params, nparams, QEMU_MIGRATION_PARAMETERS) < 0)
return ret;
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_XML,
&dom_xml) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME,
&dname) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_URI,
&uri) < 0 ||
virTypedParamsGetULLong(params, nparams,
VIR_MIGRATE_PARAM_BANDWIDTH,
&bandwidth) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_GRAPHICS_URI,
&graphicsuri) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_LISTEN_ADDRESS,
&listenAddress) < 0 ||
virTypedParamsGetInt(params, nparams,
VIR_MIGRATE_PARAM_DISKS_PORT,
&nbdPort) < 0 ||
virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_PERSIST_XML,
&persist_xml) < 0)
goto cleanup;
nmigrate_disks = virTypedParamsGetStringList(params, nparams,
VIR_MIGRATE_PARAM_MIGRATE_DISKS,
&migrate_disks);
if (nmigrate_disks < 0)
goto cleanup;
if (!(migParams = qemuMigrationParams(params, nparams, flags)))
goto cleanup;
if (!(compression = qemuMigrationCompressionParse(params, nparams, flags)))
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainMigratePerform3ParamsEnsureACL(dom->conn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
goto cleanup;
}
ret = qemuMigrationPerform(driver, dom->conn, vm, dom_xml, persist_xml,
dconnuri, uri, graphicsuri, listenAddress,
nmigrate_disks, migrate_disks, nbdPort,
compression, migParams,
cookiein, cookieinlen, cookieout, cookieoutlen,
flags, dname, bandwidth, true);
cleanup:
VIR_FREE(compression);
qemuMigrationParamsFree(&migParams);
VIR_FREE(migrate_disks);
return ret;
}
static virDomainPtr
qemuDomainMigrateFinish3(virConnectPtr dconn,
const char *dname,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
const char *dconnuri ATTRIBUTE_UNUSED,
const char *uri ATTRIBUTE_UNUSED,
unsigned long flags,
int cancelled)
{
virQEMUDriverPtr driver = dconn->privateData;
virDomainObjPtr vm;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
if (!dname) {
virReportError(VIR_ERR_NO_DOMAIN, "%s", _("missing domain name"));
return NULL;
}
vm = virDomainObjListFindByName(driver->domains, dname);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching name '%s'"), dname);
qemuMigrationErrorReport(driver, dname);
return NULL;
}
if (virDomainMigrateFinish3EnsureACL(dconn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
return NULL;
}
return qemuMigrationFinish(driver, dconn, vm,
cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, cancelled, true);
}
static virDomainPtr
qemuDomainMigrateFinish3Params(virConnectPtr dconn,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned int flags,
int cancelled)
{
virQEMUDriverPtr driver = dconn->privateData;
virDomainObjPtr vm;
const char *dname = NULL;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
if (virTypedParamsValidate(params, nparams, QEMU_MIGRATION_PARAMETERS) < 0)
return NULL;
if (virTypedParamsGetString(params, nparams,
VIR_MIGRATE_PARAM_DEST_NAME,
&dname) < 0)
return NULL;
if (!dname) {
virReportError(VIR_ERR_NO_DOMAIN, "%s", _("missing domain name"));
return NULL;
}
vm = virDomainObjListFindByName(driver->domains, dname);
if (!vm) {
virReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching name '%s'"), dname);
qemuMigrationErrorReport(driver, dname);
return NULL;
}
if (virDomainMigrateFinish3ParamsEnsureACL(dconn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
return NULL;
}
return qemuMigrationFinish(driver, dconn, vm,
cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, cancelled, true);
}
static int
qemuDomainMigrateConfirm3(virDomainPtr domain,
const char *cookiein,
int cookieinlen,
unsigned long flags,
int cancelled)
{
virDomainObjPtr vm;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
if (virDomainMigrateConfirm3EnsureACL(domain->conn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
return -1;
}
return qemuMigrationConfirm(domain->conn, vm, cookiein, cookieinlen,
flags, cancelled);
}
static int
qemuDomainMigrateConfirm3Params(virDomainPtr domain,
virTypedParameterPtr params,
int nparams,
const char *cookiein,
int cookieinlen,
unsigned int flags,
int cancelled)
{
virDomainObjPtr vm;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (virTypedParamsValidate(params, nparams, QEMU_MIGRATION_PARAMETERS) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
if (virDomainMigrateConfirm3ParamsEnsureACL(domain->conn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
return -1;
}
return qemuMigrationConfirm(domain->conn, vm, cookiein, cookieinlen,
flags, cancelled);
}
static int
qemuNodeDeviceGetPCIInfo(virNodeDeviceDefPtr def,
unsigned *domain,
unsigned *bus,
unsigned *slot,
unsigned *function)
{
virNodeDevCapsDefPtr cap;
int ret = -1;
cap = def->caps;
while (cap) {
if (cap->data.type == VIR_NODE_DEV_CAP_PCI_DEV) {
*domain = cap->data.pci_dev.domain;
*bus = cap->data.pci_dev.bus;
*slot = cap->data.pci_dev.slot;
*function = cap->data.pci_dev.function;
break;
}
cap = cap->next;
}
if (!cap) {
virReportError(VIR_ERR_INVALID_ARG,
_("device %s is not a PCI device"), def->name);
goto out;
}
ret = 0;
out:
return ret;
}
static int
qemuNodeDeviceDetachFlags(virNodeDevicePtr dev,
const char *driverName,
unsigned int flags)
{
virQEMUDriverPtr driver = dev->conn->privateData;
virPCIDevicePtr pci = NULL;
unsigned domain = 0, bus = 0, slot = 0, function = 0;
int ret = -1;
virNodeDeviceDefPtr def = NULL;
char *xml = NULL;
bool legacy = qemuHostdevHostSupportsPassthroughLegacy();
bool vfio = qemuHostdevHostSupportsPassthroughVFIO();
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
virCheckFlags(0, -1);
xml = virNodeDeviceGetXMLDesc(dev, 0);
if (!xml)
goto cleanup;
def = virNodeDeviceDefParseString(xml, EXISTING_DEVICE, NULL);
if (!def)
goto cleanup;
if (virNodeDeviceDetachFlagsEnsureACL(dev->conn, def) < 0)
goto cleanup;
if (qemuNodeDeviceGetPCIInfo(def, &domain, &bus, &slot, &function) < 0)
goto cleanup;
pci = virPCIDeviceNew(domain, bus, slot, function);
if (!pci)
goto cleanup;
if (!driverName) {
if (vfio) {
driverName = "vfio";
} else if (legacy) {
driverName = "kvm";
} else {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("neither VFIO nor KVM device assignment is "
"currently supported on this system"));
goto cleanup;
}
}
if (STREQ(driverName, "vfio")) {
if (!vfio) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("VFIO device assignment is currently not "
"supported on this system"));
goto cleanup;
}
virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_VFIO);
} else if (STREQ(driverName, "kvm")) {
if (!legacy) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("KVM device assignment is currently not "
"supported on this system"));
goto cleanup;
}
virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_KVM);
} else {
virReportError(VIR_ERR_INVALID_ARG,
_("unknown driver name '%s'"), driverName);
goto cleanup;
}
ret = virHostdevPCINodeDeviceDetach(hostdev_mgr, pci);
cleanup:
virPCIDeviceFree(pci);
virNodeDeviceDefFree(def);
VIR_FREE(xml);
return ret;
}
static int
qemuNodeDeviceDettach(virNodeDevicePtr dev)
{
return qemuNodeDeviceDetachFlags(dev, NULL, 0);
}
static int
qemuNodeDeviceReAttach(virNodeDevicePtr dev)
{
virQEMUDriverPtr driver = dev->conn->privateData;
virPCIDevicePtr pci = NULL;
unsigned domain = 0, bus = 0, slot = 0, function = 0;
int ret = -1;
virNodeDeviceDefPtr def = NULL;
char *xml = NULL;
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
xml = virNodeDeviceGetXMLDesc(dev, 0);
if (!xml)
goto cleanup;
def = virNodeDeviceDefParseString(xml, EXISTING_DEVICE, NULL);
if (!def)
goto cleanup;
if (virNodeDeviceReAttachEnsureACL(dev->conn, def) < 0)
goto cleanup;
if (qemuNodeDeviceGetPCIInfo(def, &domain, &bus, &slot, &function) < 0)
goto cleanup;
pci = virPCIDeviceNew(domain, bus, slot, function);
if (!pci)
goto cleanup;
ret = virHostdevPCINodeDeviceReAttach(hostdev_mgr, pci);
virPCIDeviceFree(pci);
cleanup:
virNodeDeviceDefFree(def);
VIR_FREE(xml);
return ret;
}
static int
qemuNodeDeviceReset(virNodeDevicePtr dev)
{
virQEMUDriverPtr driver = dev->conn->privateData;
virPCIDevicePtr pci;
unsigned domain = 0, bus = 0, slot = 0, function = 0;
int ret = -1;
virNodeDeviceDefPtr def = NULL;
char *xml = NULL;
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
xml = virNodeDeviceGetXMLDesc(dev, 0);
if (!xml)
goto cleanup;
def = virNodeDeviceDefParseString(xml, EXISTING_DEVICE, NULL);
if (!def)
goto cleanup;
if (virNodeDeviceResetEnsureACL(dev->conn, def) < 0)
goto cleanup;
if (qemuNodeDeviceGetPCIInfo(def, &domain, &bus, &slot, &function) < 0)
goto cleanup;
pci = virPCIDeviceNew(domain, bus, slot, function);
if (!pci)
goto cleanup;
ret = virHostdevPCINodeDeviceReset(hostdev_mgr, pci);
virPCIDeviceFree(pci);
cleanup:
virNodeDeviceDefFree(def);
VIR_FREE(xml);
return ret;
}
static int
qemuConnectCompareCPU(virConnectPtr conn,
const char *xmlDesc,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = VIR_CPU_COMPARE_ERROR;
virCapsPtr caps = NULL;
bool failIncompatible;
virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE,
VIR_CPU_COMPARE_ERROR);
if (virConnectCompareCPUEnsureACL(conn) < 0)
goto cleanup;
failIncompatible = !!(flags & VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
ret = virCPUCompareXML(caps->host.arch, caps->host.cpu,
xmlDesc, failIncompatible);
cleanup:
virObjectUnref(caps);
return ret;
}
static char *
qemuConnectBaselineCPU(virConnectPtr conn ATTRIBUTE_UNUSED,
const char **xmlCPUs,
unsigned int ncpus,
unsigned int flags)
{
char *cpu = NULL;
virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES |
VIR_CONNECT_BASELINE_CPU_MIGRATABLE, NULL);
if (virConnectBaselineCPUEnsureACL(conn) < 0)
goto cleanup;
cpu = cpuBaselineXML(xmlCPUs, ncpus, NULL, 0, flags);
cleanup:
return cpu;
}
static int
qemuDomainGetJobStatsInternal(virQEMUDriverPtr driver,
virDomainObjPtr vm,
bool completed,
qemuDomainJobInfoPtr jobInfo)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
qemuDomainJobInfoPtr info;
bool fetch = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATION_EVENT);
int ret = -1;
if (completed)
fetch = false;
/* Do not ask QEMU if migration is not even running yet */
if (!priv->job.current || !priv->job.current->stats.status)
fetch = false;
if (fetch) {
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("migration statistics are available only on "
"the source host"));
return -1;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
return -1;
}
if (!completed &&
!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto cleanup;
}
if (completed && priv->job.current)
info = NULL;
else if (completed)
info = priv->job.completed;
else
info = priv->job.current;
if (!info) {
jobInfo->type = VIR_DOMAIN_JOB_NONE;
ret = 0;
goto cleanup;
}
*jobInfo = *info;
if (jobInfo->type == VIR_DOMAIN_JOB_BOUNDED ||
jobInfo->type == VIR_DOMAIN_JOB_UNBOUNDED) {
if (fetch)
ret = qemuMigrationFetchJobStatus(driver, vm, QEMU_ASYNC_JOB_NONE,
jobInfo);
else
ret = qemuDomainJobInfoUpdateTime(jobInfo);
} else {
ret = 0;
}
cleanup:
if (fetch)
qemuDomainObjEndJob(driver, vm);
return ret;
}
static int
qemuDomainGetJobInfo(virDomainPtr dom,
virDomainJobInfoPtr info)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainJobInfo jobInfo;
virDomainObjPtr vm;
int ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetJobInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainGetJobStatsInternal(driver, vm, false, &jobInfo) < 0)
goto cleanup;
if (jobInfo.type == VIR_DOMAIN_JOB_NONE) {
memset(info, 0, sizeof(*info));
info->type = VIR_DOMAIN_JOB_NONE;
ret = 0;
goto cleanup;
}
ret = qemuDomainJobInfoToInfo(&jobInfo, info);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetJobStats(virDomainPtr dom,
int *type,
virTypedParameterPtr *params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
qemuDomainJobInfo jobInfo;
bool completed = !!(flags & VIR_DOMAIN_JOB_STATS_COMPLETED);
int ret = -1;
virCheckFlags(VIR_DOMAIN_JOB_STATS_COMPLETED, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetJobStatsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
priv = vm->privateData;
if (qemuDomainGetJobStatsInternal(driver, vm, completed, &jobInfo) < 0)
goto cleanup;
if (jobInfo.type == VIR_DOMAIN_JOB_NONE) {
*type = VIR_DOMAIN_JOB_NONE;
*params = NULL;
*nparams = 0;
ret = 0;
goto cleanup;
}
ret = qemuDomainJobInfoToParams(&jobInfo, type, params, nparams);
if (completed && ret == 0)
VIR_FREE(priv->job.completed);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int qemuDomainAbortJob(virDomainPtr dom)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
int reason;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainAbortJobEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_ABORT) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
if (!priv->job.asyncJob || priv->job.dump_memory_only) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("no job is active on the domain"));
goto endjob;
}
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot abort incoming migration;"
" use virDomainDestroy instead"));
goto endjob;
}
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_OUT &&
(priv->job.current->stats.status == QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY ||
(virDomainObjGetState(vm, &reason) == VIR_DOMAIN_PAUSED &&
reason == VIR_DOMAIN_PAUSED_POSTCOPY))) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot abort migration in post-copy mode"));
goto endjob;
}
VIR_DEBUG("Cancelling job at client request");
qemuDomainObjAbortAsyncJob(vm);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorMigrateCancel(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainMigrateSetMaxDowntime(virDomainPtr dom,
unsigned long long downtime,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainMigrateSetMaxDowntimeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MIGRATION_OP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
VIR_DEBUG("Setting migration downtime to %llums", downtime);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSetMigrationDowntime(priv->mon, downtime);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainMigrateGetCompressionCache(virDomainPtr dom,
unsigned long long *cacheSize,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainMigrateGetCompressionCacheEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetMigrationCapability(
priv->mon,
QEMU_MONITOR_MIGRATION_CAPS_XBZRLE);
if (ret == 0) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Compressed migration is not supported by "
"QEMU binary"));
ret = -1;
} else if (ret > 0) {
ret = qemuMonitorGetMigrationCacheSize(priv->mon, cacheSize);
}
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainMigrateSetCompressionCache(virDomainPtr dom,
unsigned long long cacheSize,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainMigrateSetCompressionCacheEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MIGRATION_OP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetMigrationCapability(
priv->mon,
QEMU_MONITOR_MIGRATION_CAPS_XBZRLE);
if (ret == 0) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("Compressed migration is not supported by "
"QEMU binary"));
ret = -1;
} else if (ret > 0) {
VIR_DEBUG("Setting compression cache to %llu B", cacheSize);
ret = qemuMonitorSetMigrationCacheSize(priv->mon, cacheSize);
}
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainMigrateSetMaxSpeed(virDomainPtr dom,
unsigned long bandwidth,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainMigrateSetMaxSpeedEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (bandwidth > QEMU_DOMAIN_MIG_BANDWIDTH_MAX) {
virReportError(VIR_ERR_OVERFLOW,
_("bandwidth must be less than %llu"),
QEMU_DOMAIN_MIG_BANDWIDTH_MAX + 1ULL);
goto cleanup;
}
if (virDomainObjIsActive(vm)) {
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MIGRATION_OP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
VIR_DEBUG("Setting migration bandwidth to %luMbs", bandwidth);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSetMigrationSpeed(priv->mon, bandwidth);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
if (ret == 0)
priv->migMaxBandwidth = bandwidth;
endjob:
qemuDomainObjEndJob(driver, vm);
} else {
priv->migMaxBandwidth = bandwidth;
ret = 0;
}
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainMigrateGetMaxSpeed(virDomainPtr dom,
unsigned long *bandwidth,
unsigned int flags)
{
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainMigrateGetMaxSpeedEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
*bandwidth = priv->migMaxBandwidth;
ret = 0;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainMigrateStartPostCopy(virDomainPtr dom,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainMigrateStartPostCopyEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MIGRATION_OP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
priv = vm->privateData;
if (priv->job.asyncJob != QEMU_ASYNC_JOB_MIGRATION_OUT) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("post-copy can only be started while "
"outgoing migration is in progress"));
goto endjob;
}
if (!priv->job.postcopyEnabled) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("switching to post-copy requires migration to be "
"started with VIR_MIGRATE_POSTCOPY flag"));
goto endjob;
}
VIR_DEBUG("Starting post-copy");
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorMigrateStartPostCopy(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* Return -1 if request is not sent to agent due to misconfig, -2 if request
* is sent but failed, and number of frozen filesystems on success. If -2 is
* returned, FSThaw should be called revert the quiesced status. */
static int
qemuDomainSnapshotFSFreeze(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
virDomainObjPtr vm,
const char **mountpoints,
unsigned int nmountpoints)
{
qemuAgentPtr agent;
int frozen;
if (!qemuDomainAgentAvailable(vm, true))
return -1;
agent = qemuDomainObjEnterAgent(vm);
frozen = qemuAgentFSFreeze(agent, mountpoints, nmountpoints);
qemuDomainObjExitAgent(vm, agent);
return frozen < 0 ? -2 : frozen;
}
/* Return -1 on error, otherwise number of thawed filesystems. */
static int
qemuDomainSnapshotFSThaw(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
virDomainObjPtr vm,
bool report)
{
qemuAgentPtr agent;
int thawed;
virErrorPtr err = NULL;
if (!qemuDomainAgentAvailable(vm, report))
return -1;
agent = qemuDomainObjEnterAgent(vm);
if (!report)
err = virSaveLastError();
thawed = qemuAgentFSThaw(agent);
if (!report)
virSetError(err);
qemuDomainObjExitAgent(vm, agent);
virFreeError(err);
return thawed;
}
/* The domain is expected to be locked and inactive. */
static int
qemuDomainSnapshotCreateInactiveInternal(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap)
{
return qemuDomainSnapshotForEachQcow2(driver, vm, snap, "-c", false);
}
/* The domain is expected to be locked and inactive. */
static int
qemuDomainSnapshotCreateInactiveExternal(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap,
bool reuse)
{
size_t i;
virDomainSnapshotDiskDefPtr snapdisk;
virDomainDiskDefPtr defdisk;
virCommandPtr cmd = NULL;
const char *qemuImgPath;
virBitmapPtr created = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
int ret = -1;
if (!(qemuImgPath = qemuFindQemuImgBinary(driver)))
goto cleanup;
if (!(created = virBitmapNew(snap->def->ndisks)))
goto cleanup;
/* If reuse is true, then qemuDomainSnapshotPrepare already
* ensured that the new files exist, and it was up to the user to
* create them correctly. */
for (i = 0; i < snap->def->ndisks && !reuse; i++) {
snapdisk = &(snap->def->disks[i]);
defdisk = snap->def->dom->disks[snapdisk->idx];
if (snapdisk->snapshot != VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL)
continue;
if (!snapdisk->src->format)
snapdisk->src->format = VIR_STORAGE_FILE_QCOW2;
/* creates cmd line args: qemu-img create -f qcow2 -o */
if (!(cmd = virCommandNewArgList(qemuImgPath,
"create",
"-f",
virStorageFileFormatTypeToString(snapdisk->src->format),
"-o",
NULL)))
goto cleanup;
if (defdisk->src->format > 0) {
/* adds cmd line arg: backing_file=/path/to/backing/file,backing_fmd=format */
virCommandAddArgFormat(cmd, "backing_file=%s,backing_fmt=%s",
defdisk->src->path,
virStorageFileFormatTypeToString(defdisk->src->format));
} else {
if (!cfg->allowDiskFormatProbing) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown image format of '%s' and "
"format probing is disabled"),
defdisk->src->path);
goto cleanup;
}
/* adds cmd line arg: backing_file=/path/to/backing/file */
virCommandAddArgFormat(cmd, "backing_file=%s", defdisk->src->path);
}
/* adds cmd line args: /path/to/target/file */
virCommandAddArg(cmd, snapdisk->src->path);
/* If the target does not exist, we're going to create it possibly */
if (!virFileExists(snapdisk->src->path))
ignore_value(virBitmapSetBit(created, i));
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
virCommandFree(cmd);
cmd = NULL;
}
/* update disk definitions */
for (i = 0; i < snap->def->ndisks; i++) {
snapdisk = &(snap->def->disks[i]);
defdisk = vm->def->disks[snapdisk->idx];
if (snapdisk->snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL) {
VIR_FREE(defdisk->src->path);
if (VIR_STRDUP(defdisk->src->path, snapdisk->src->path) < 0) {
/* we cannot rollback here in a sane way */
goto cleanup;
}
defdisk->src->format = snapdisk->src->format;
if (virDomainSaveConfig(cfg->configDir, driver->caps, vm->def) < 0)
goto cleanup;
}
}
ret = 0;
cleanup:
virCommandFree(cmd);
/* unlink images if creation has failed */
if (ret < 0 && created) {
ssize_t bit = -1;
while ((bit = virBitmapNextSetBit(created, bit)) >= 0) {
snapdisk = &(snap->def->disks[bit]);
if (unlink(snapdisk->src->path) < 0)
VIR_WARN("Failed to remove snapshot image '%s'",
snapdisk->src->path);
}
}
virBitmapFree(created);
virObjectUnref(cfg);
return ret;
}
/* The domain is expected to be locked and active. */
static int
qemuDomainSnapshotCreateActiveInternal(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap,
unsigned int flags)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virObjectEventPtr event = NULL;
bool resume = false;
int ret = -1;
if (!qemuMigrationIsAllowed(driver, vm, false, 0))
goto cleanup;
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
/* savevm monitor command pauses the domain emitting an event which
* confuses libvirt since it's not notified when qemu resumes the
* domain. Thus we stop and start CPUs ourselves.
*/
if (qemuProcessStopCPUs(driver, vm, VIR_DOMAIN_PAUSED_SAVE,
QEMU_ASYNC_JOB_SNAPSHOT) < 0)
goto cleanup;
resume = true;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto cleanup;
}
}
if (qemuDomainObjEnterMonitorAsync(driver, vm,
QEMU_ASYNC_JOB_SNAPSHOT) < 0) {
resume = false;
goto cleanup;
}
ret = qemuMonitorCreateSnapshot(priv->mon, snap->def->name);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
if (ret < 0)
goto cleanup;
if (!(snap->def->cookie = (virObjectPtr) qemuDomainSaveCookieNew(vm)))
goto cleanup;
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_HALT) {
event = virDomainEventLifecycleNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT);
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT,
QEMU_ASYNC_JOB_SNAPSHOT, 0);
virDomainAuditStop(vm, "from-snapshot");
resume = false;
}
cleanup:
if (resume && virDomainObjIsActive(vm) &&
qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_SNAPSHOT) < 0) {
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR);
if (virGetLastError() == NULL) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("resuming after snapshot failed"));
}
}
qemuDomainEventQueue(driver, event);
return ret;
}
static int
qemuDomainSnapshotPrepareDiskExternalBackingInactive(virDomainDiskDefPtr disk)
{
int actualType = virStorageSourceGetActualType(disk->src);
switch ((virStorageType) actualType) {
case VIR_STORAGE_TYPE_BLOCK:
case VIR_STORAGE_TYPE_FILE:
return 0;
case VIR_STORAGE_TYPE_NETWORK:
switch ((virStorageNetProtocol) disk->src->protocol) {
case VIR_STORAGE_NET_PROTOCOL_NONE:
case VIR_STORAGE_NET_PROTOCOL_NBD:
case VIR_STORAGE_NET_PROTOCOL_RBD:
case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
case VIR_STORAGE_NET_PROTOCOL_ISCSI:
case VIR_STORAGE_NET_PROTOCOL_HTTP:
case VIR_STORAGE_NET_PROTOCOL_HTTPS:
case VIR_STORAGE_NET_PROTOCOL_FTP:
case VIR_STORAGE_NET_PROTOCOL_FTPS:
case VIR_STORAGE_NET_PROTOCOL_TFTP:
case VIR_STORAGE_NET_PROTOCOL_SSH:
case VIR_STORAGE_NET_PROTOCOL_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("external inactive snapshots are not supported on "
"'network' disks using '%s' protocol"),
virStorageNetProtocolTypeToString(disk->src->protocol));
return -1;
}
break;
case VIR_STORAGE_TYPE_DIR:
case VIR_STORAGE_TYPE_VOLUME:
case VIR_STORAGE_TYPE_NONE:
case VIR_STORAGE_TYPE_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("external inactive snapshots are not supported on "
"'%s' disks"), virStorageTypeToString(actualType));
return -1;
}
return 0;
}
static int
qemuDomainSnapshotPrepareDiskExternalBackingActive(virDomainDiskDefPtr disk)
{
if (disk->device == VIR_DOMAIN_DISK_DEVICE_LUN) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("external active snapshots are not supported on scsi "
"passthrough devices"));
return -1;
}
return 0;
}
static int
qemuDomainSnapshotPrepareDiskExternalOverlayActive(virDomainSnapshotDiskDefPtr disk)
{
int actualType = virStorageSourceGetActualType(disk->src);
switch ((virStorageType) actualType) {
case VIR_STORAGE_TYPE_BLOCK:
case VIR_STORAGE_TYPE_FILE:
return 0;
case VIR_STORAGE_TYPE_NETWORK:
switch ((virStorageNetProtocol) disk->src->protocol) {
case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
return 0;
case VIR_STORAGE_NET_PROTOCOL_NONE:
case VIR_STORAGE_NET_PROTOCOL_NBD:
case VIR_STORAGE_NET_PROTOCOL_RBD:
case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
case VIR_STORAGE_NET_PROTOCOL_ISCSI:
case VIR_STORAGE_NET_PROTOCOL_HTTP:
case VIR_STORAGE_NET_PROTOCOL_HTTPS:
case VIR_STORAGE_NET_PROTOCOL_FTP:
case VIR_STORAGE_NET_PROTOCOL_FTPS:
case VIR_STORAGE_NET_PROTOCOL_TFTP:
case VIR_STORAGE_NET_PROTOCOL_SSH:
case VIR_STORAGE_NET_PROTOCOL_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("external active snapshots are not supported on "
"'network' disks using '%s' protocol"),
virStorageNetProtocolTypeToString(disk->src->protocol));
return -1;
}
break;
case VIR_STORAGE_TYPE_DIR:
case VIR_STORAGE_TYPE_VOLUME:
case VIR_STORAGE_TYPE_NONE:
case VIR_STORAGE_TYPE_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("external active snapshots are not supported on "
"'%s' disks"), virStorageTypeToString(actualType));
return -1;
}
return 0;
}
static int
qemuDomainSnapshotPrepareDiskExternalOverlayInactive(virDomainSnapshotDiskDefPtr disk)
{
int actualType = virStorageSourceGetActualType(disk->src);
switch ((virStorageType) actualType) {
case VIR_STORAGE_TYPE_BLOCK:
case VIR_STORAGE_TYPE_FILE:
return 0;
case VIR_STORAGE_TYPE_NETWORK:
case VIR_STORAGE_TYPE_DIR:
case VIR_STORAGE_TYPE_VOLUME:
case VIR_STORAGE_TYPE_NONE:
case VIR_STORAGE_TYPE_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("external inactive snapshots are not supported on "
"'%s' disks"), virStorageTypeToString(actualType));
return -1;
}
return 0;
}
static int
qemuDomainSnapshotPrepareDiskExternal(virConnectPtr conn,
virDomainDiskDefPtr disk,
virDomainSnapshotDiskDefPtr snapdisk,
bool active,
bool reuse)
{
int ret = -1;
struct stat st;
if (qemuTranslateSnapshotDiskSourcePool(conn, snapdisk) < 0)
return -1;
if (!active) {
if (virStorageTranslateDiskSourcePool(conn, disk) < 0)
return -1;
if (qemuDomainSnapshotPrepareDiskExternalBackingInactive(disk) < 0)
return -1;
if (qemuDomainSnapshotPrepareDiskExternalOverlayInactive(snapdisk) < 0)
return -1;
} else {
if (qemuDomainSnapshotPrepareDiskExternalBackingActive(disk) < 0)
return -1;
if (qemuDomainSnapshotPrepareDiskExternalOverlayActive(snapdisk) < 0)
return -1;
}
if (virStorageFileInit(snapdisk->src) < 0)
return -1;
if (virStorageFileStat(snapdisk->src, &st) < 0) {
if (errno != ENOENT) {
virReportSystemError(errno,
_("unable to stat for disk %s: %s"),
snapdisk->name, snapdisk->src->path);
goto cleanup;
} else if (reuse) {
virReportSystemError(errno,
_("missing existing file for disk %s: %s"),
snapdisk->name, snapdisk->src->path);
goto cleanup;
}
} else if (!S_ISBLK(st.st_mode) && st.st_size && !reuse) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("external snapshot file for disk %s already "
"exists and is not a block device: %s"),
snapdisk->name, snapdisk->src->path);
goto cleanup;
}
ret = 0;
cleanup:
virStorageFileDeinit(snapdisk->src);
return ret;
}
static int
qemuDomainSnapshotPrepareDiskInternal(virConnectPtr conn,
virDomainDiskDefPtr disk,
bool active)
{
int actualType;
/* active disks are handled by qemu itself so no need to worry about those */
if (active)
return 0;
if (virStorageTranslateDiskSourcePool(conn, disk) < 0)
return -1;
actualType = virStorageSourceGetActualType(disk->src);
switch ((virStorageType) actualType) {
case VIR_STORAGE_TYPE_BLOCK:
case VIR_STORAGE_TYPE_FILE:
return 0;
case VIR_STORAGE_TYPE_NETWORK:
switch ((virStorageNetProtocol) disk->src->protocol) {
case VIR_STORAGE_NET_PROTOCOL_NONE:
case VIR_STORAGE_NET_PROTOCOL_NBD:
case VIR_STORAGE_NET_PROTOCOL_RBD:
case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
case VIR_STORAGE_NET_PROTOCOL_ISCSI:
case VIR_STORAGE_NET_PROTOCOL_HTTP:
case VIR_STORAGE_NET_PROTOCOL_HTTPS:
case VIR_STORAGE_NET_PROTOCOL_FTP:
case VIR_STORAGE_NET_PROTOCOL_FTPS:
case VIR_STORAGE_NET_PROTOCOL_TFTP:
case VIR_STORAGE_NET_PROTOCOL_SSH:
case VIR_STORAGE_NET_PROTOCOL_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("internal inactive snapshots are not supported on "
"'network' disks using '%s' protocol"),
virStorageNetProtocolTypeToString(disk->src->protocol));
return -1;
}
break;
case VIR_STORAGE_TYPE_DIR:
case VIR_STORAGE_TYPE_VOLUME:
case VIR_STORAGE_TYPE_NONE:
case VIR_STORAGE_TYPE_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("internal inactive snapshots are not supported on "
"'%s' disks"), virStorageTypeToString(actualType));
return -1;
}
return 0;
}
static int
qemuDomainSnapshotPrepare(virConnectPtr conn,
virDomainObjPtr vm,
virDomainSnapshotDefPtr def,
unsigned int *flags)
{
int ret = -1;
size_t i;
bool active = virDomainObjIsActive(vm);
bool reuse = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT) != 0;
bool atomic = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC) != 0;
bool found_internal = false;
bool forbid_internal = false;
int external = 0;
qemuDomainObjPrivatePtr priv = vm->privateData;
if (def->state == VIR_DOMAIN_DISK_SNAPSHOT &&
reuse && !virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("reuse is not supported with this QEMU binary"));
goto cleanup;
}
for (i = 0; i < def->ndisks; i++) {
virDomainSnapshotDiskDefPtr disk = &def->disks[i];
virDomainDiskDefPtr dom_disk = vm->def->disks[i];
if (disk->snapshot != VIR_DOMAIN_SNAPSHOT_LOCATION_NONE &&
qemuDomainDiskBlockJobIsActive(dom_disk))
goto cleanup;
switch ((virDomainSnapshotLocation) disk->snapshot) {
case VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL:
found_internal = true;
if (def->state == VIR_DOMAIN_DISK_SNAPSHOT && active) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("active qemu domains require external disk "
"snapshots; disk %s requested internal"),
disk->name);
goto cleanup;
}
if (qemuDomainSnapshotPrepareDiskInternal(conn, dom_disk,
active) < 0)
goto cleanup;
if (vm->def->disks[i]->src->format > 0 &&
vm->def->disks[i]->src->format != VIR_STORAGE_FILE_QCOW2) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("internal snapshot for disk %s unsupported "
"for storage type %s"),
disk->name,
virStorageFileFormatTypeToString(
vm->def->disks[i]->src->format));
goto cleanup;
}
break;
case VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL:
if (!disk->src->format) {
disk->src->format = VIR_STORAGE_FILE_QCOW2;
} else if (disk->src->format != VIR_STORAGE_FILE_QCOW2 &&
disk->src->format != VIR_STORAGE_FILE_QED) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("external snapshot format for disk %s "
"is unsupported: %s"),
disk->name,
virStorageFileFormatTypeToString(disk->src->format));
goto cleanup;
}
if (qemuDomainSnapshotPrepareDiskExternal(conn, dom_disk, disk,
active, reuse) < 0)
goto cleanup;
external++;
break;
case VIR_DOMAIN_SNAPSHOT_LOCATION_NONE:
/* Remember seeing a disk that has snapshot disabled */
if (!virStorageSourceIsEmpty(dom_disk->src) &&
!dom_disk->src->readonly)
forbid_internal = true;
break;
case VIR_DOMAIN_SNAPSHOT_LOCATION_DEFAULT:
case VIR_DOMAIN_SNAPSHOT_LOCATION_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unexpected code path"));
goto cleanup;
}
}
if (!found_internal && !external &&
def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("nothing selected for snapshot"));
goto cleanup;
}
/* internal snapshot requires a disk image to store the memory image to, and
* also disks can't be excluded from an internal snapshot*/
if ((def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL && !found_internal) ||
(found_internal && forbid_internal)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("internal snapshots and checkpoints require all "
"disks to be selected for snapshot"));
goto cleanup;
}
/* disk snapshot requires at least one disk */
if (def->state == VIR_DOMAIN_DISK_SNAPSHOT && !external) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("disk-only snapshots require at least "
"one disk to be selected for snapshot"));
goto cleanup;
}
/* For now, we don't allow mixing internal and external disks.
* XXX technically, we could mix internal and external disks for
* offline snapshots */
if ((found_internal && external) ||
(def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL && external) ||
(def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL && found_internal)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("mixing internal and external targets for a snapshot "
"is not yet supported"));
goto cleanup;
}
/* internal snapshots + pflash based loader have the following problems:
* - if the variable store is raw, the snapshot fails
* - alowing a qcow2 image as the varstore would make it eligible to receive
* the vmstate dump, which would make it huge
* - offline snapshot would not snapshot the varstore at all
*
* Avoid the issues by forbidding internal snapshot with pflash completely.
*/
if (found_internal &&
vm->def->os.loader &&
vm->def->os.loader->type == VIR_DOMAIN_LOADER_TYPE_PFLASH) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("internal snapshots of a VM with pflash based "
"firmware are not supported"));
goto cleanup;
}
/* Alter flags to let later users know what we learned. */
if (external && !active)
*flags |= VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY;
if (def->state != VIR_DOMAIN_DISK_SNAPSHOT && active) {
if (external == 1 ||
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION)) {
*flags |= VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC;
} else if (atomic && external > 1) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("atomic live snapshot of multiple disks "
"is unsupported"));
goto cleanup;
}
}
ret = 0;
cleanup:
return ret;
}
struct _qemuDomainSnapshotDiskData {
virStorageSourcePtr src;
bool initialized; /* @src was initialized in the storage driver */
bool created; /* @src was created by the snapshot code */
bool prepared; /* @src was prepared using qemuDomainDiskChainElementPrepare */
virDomainDiskDefPtr disk;
virStorageSourcePtr persistsrc;
virDomainDiskDefPtr persistdisk;
};
typedef struct _qemuDomainSnapshotDiskData qemuDomainSnapshotDiskData;
typedef qemuDomainSnapshotDiskData *qemuDomainSnapshotDiskDataPtr;
static void
qemuDomainSnapshotDiskDataFree(qemuDomainSnapshotDiskDataPtr data,
size_t ndata,
virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
size_t i;
if (!data)
return;
for (i = 0; i < ndata; i++) {
/* on success of the snapshot the 'src' and 'persistsrc' properties will
* be set to NULL by qemuDomainSnapshotUpdateDiskSources */
if (data[i].src) {
if (data[i].initialized)
virStorageFileDeinit(data[i].src);
if (data[i].prepared)
qemuDomainDiskChainElementRevoke(driver, vm, data[i].src);
virStorageSourceFree(data[i].src);
}
virStorageSourceFree(data[i].persistsrc);
}
VIR_FREE(data);
}
/**
* qemuDomainSnapshotDiskDataCollect:
*
* Collects and prepares a list of structures that hold information about disks
* that are selected for the snapshot.
*/
static qemuDomainSnapshotDiskDataPtr
qemuDomainSnapshotDiskDataCollect(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap)
{
size_t i;
qemuDomainSnapshotDiskDataPtr ret;
qemuDomainSnapshotDiskDataPtr dd;
if (VIR_ALLOC_N(ret, snap->def->ndisks) < 0)
return NULL;
for (i = 0; i < snap->def->ndisks; i++) {
if (snap->def->disks[i].snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE)
continue;
dd = ret + i;
dd->disk = vm->def->disks[i];
if (!(dd->src = virStorageSourceCopy(snap->def->disks[i].src, false)))
goto error;
if (virStorageSourceInitChainElement(dd->src, dd->disk->src, false) < 0)
goto error;
if (qemuDomainStorageFileInit(driver, vm, dd->src) < 0)
goto error;
dd->initialized = true;
/* Note that it's unsafe to assume that the disks in the persistent
* definition match up with the disks in the live definition just by
* checking that the target name is the same. We've done that
* historically this way though. */
if (vm->newDef &&
(dd->persistdisk = virDomainDiskByName(vm->newDef, dd->disk->dst,
false))) {
if (!(dd->persistsrc = virStorageSourceCopy(dd->src, false)))
goto error;
if (virStorageSourceInitChainElement(dd->persistsrc,
dd->persistdisk->src, false) < 0)
goto error;
}
}
return ret;
error:
qemuDomainSnapshotDiskDataFree(ret, snap->def->ndisks, driver, vm);
return NULL;
}
/**
* qemuDomainSnapshotUpdateDiskSources:
* @dd: snapshot disk data object
* @persist: set to true if persistent config of the VM was changed
*
* Updates disk definition after a successful snapshot.
*/
static void
qemuDomainSnapshotUpdateDiskSources(qemuDomainSnapshotDiskDataPtr dd,
bool *persist)
{
if (!dd->src)
return;
/* storage driver access won'd be needed */
if (dd->initialized)
virStorageFileDeinit(dd->src);
VIR_STEAL_PTR(dd->src->backingStore, dd->disk->src);
VIR_STEAL_PTR(dd->disk->src, dd->src);
if (dd->persistdisk) {
VIR_STEAL_PTR(dd->persistsrc->backingStore, dd->persistdisk->src);
VIR_STEAL_PTR(dd->persistdisk->src, dd->persistsrc);
*persist = true;
}
}
/* The domain is expected to hold monitor lock. */
static int
qemuDomainSnapshotCreateSingleDiskActive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
qemuDomainSnapshotDiskDataPtr dd,
virJSONValuePtr actions,
bool reuse,
qemuDomainAsyncJob asyncJob)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
char *device = NULL;
char *source = NULL;
const char *formatStr = NULL;
int ret = -1, rc;
if (!(device = qemuAliasFromDisk(dd->disk)))
goto cleanup;
if (qemuGetDriveSourceString(dd->src, NULL, &source) < 0)
goto cleanup;
/* pre-create the image file so that we can label it before handing it to qemu */
if (!reuse && dd->src->type != VIR_STORAGE_TYPE_BLOCK) {
if (virStorageFileCreate(dd->src) < 0) {
virReportSystemError(errno, _("failed to create image file '%s'"),
source);
goto cleanup;
}
dd->created = true;
}
/* set correct security, cgroup and locking options on the new image */
if (qemuDomainDiskChainElementPrepare(driver, vm, dd->src, false) < 0) {
qemuDomainDiskChainElementRevoke(driver, vm, dd->src);
goto cleanup;
}
dd->prepared = true;
/* create the actual snapshot */
formatStr = virStorageFileFormatTypeToString(dd->src->format);
/* The monitor is only accessed if qemu doesn't support transactions.
* Otherwise the following monitor command only constructs the command.
*/
if (!actions &&
qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
goto cleanup;
ret = rc = qemuMonitorDiskSnapshot(priv->mon, actions, device, source,
formatStr, reuse);
if (!actions) {
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
}
virDomainAuditDisk(vm, dd->disk->src, dd->src, "snapshot", rc >= 0);
cleanup:
VIR_FREE(device);
VIR_FREE(source);
return ret;
}
/* The domain is expected to be locked and active. */
static int
qemuDomainSnapshotCreateDiskActive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap,
unsigned int flags,
qemuDomainAsyncJob asyncJob)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virJSONValuePtr actions = NULL;
bool do_transaction = false;
int ret = 0;
size_t i;
bool persist = false;
bool reuse = (flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT) != 0;
virQEMUDriverConfigPtr cfg = NULL;
qemuDomainSnapshotDiskDataPtr diskdata = NULL;
virErrorPtr orig_err = NULL;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
return -1;
}
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION)) {
if (!(actions = virJSONValueNewArray()))
return -1;
} else if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DISK_SNAPSHOT)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("live disk snapshot not supported with this "
"QEMU binary"));
return -1;
}
/* prepare a list of objects to use in the vm definition so that we don't
* have to roll back later */
if (!(diskdata = qemuDomainSnapshotDiskDataCollect(driver, vm, snap)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
/* Based on earlier qemuDomainSnapshotPrepare, all disks in this list are
* now either VIR_DOMAIN_SNAPSHOT_LOCATION_NONE, or
* VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL with a valid file name and
* qcow2 format. */
for (i = 0; i < snap->def->ndisks; i++) {
if (snap->def->disks[i].snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE)
continue;
ret = qemuDomainSnapshotCreateSingleDiskActive(driver, vm,
&diskdata[i],
actions, reuse, asyncJob);
/* without transaction support the change can't be rolled back */
if (!actions)
qemuDomainSnapshotUpdateDiskSources(&diskdata[i], &persist);
if (ret < 0)
goto error;
do_transaction = true;
}
if (actions && do_transaction) {
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
goto cleanup;
ret = qemuMonitorTransaction(priv->mon, actions);
if (qemuDomainObjExitMonitor(driver, vm) < 0 || ret < 0) {
ret = -1;
goto error;
}
for (i = 0; i < snap->def->ndisks; i++)
qemuDomainSnapshotUpdateDiskSources(&diskdata[i], &persist);
}
error:
if (ret < 0) {
orig_err = virSaveLastError();
for (i = 0; i < snap->def->ndisks; i++) {
if (!diskdata[i].src)
continue;
if (diskdata[i].prepared)
qemuDomainDiskChainElementRevoke(driver, vm, diskdata[i].src);
if (diskdata[i].created &&
virStorageFileUnlink(diskdata[i].src) < 0)
VIR_WARN("Unable to remove just-created %s", diskdata[i].src->path);
}
} else {
/* on successful snapshot we need to remove locks from the now-old
* disks and if the VM is paused release locks on the images since qemu
* stopped using them*/
bool paused = virDomainObjGetState(vm, NULL) != VIR_DOMAIN_RUNNING;
for (i = 0; i < snap->def->ndisks; i++) {
if (!diskdata[i].disk)
continue;
if (paused)
virDomainLockImageDetach(driver->lockManager, vm,
diskdata[i].disk->src);
virDomainLockImageDetach(driver->lockManager, vm,
diskdata[i].disk->src->backingStore);
}
}
if (ret == 0 || !actions) {
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0 ||
(persist && virDomainSaveConfig(cfg->configDir, driver->caps,
vm->newDef) < 0))
ret = -1;
}
cleanup:
qemuDomainSnapshotDiskDataFree(diskdata, snap->def->ndisks, driver, vm);
virJSONValueFree(actions);
virObjectUnref(cfg);
if (orig_err) {
virSetError(orig_err);
virFreeError(orig_err);
}
return ret;
}
static int
qemuDomainSnapshotCreateActiveExternal(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap,
unsigned int flags)
{
virObjectEventPtr event;
bool resume = false;
int ret = -1;
qemuDomainObjPrivatePtr priv = vm->privateData;
char *xml = NULL;
bool memory = snap->def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
bool memory_unlink = false;
bool atomic = !!(flags & VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC);
bool transaction = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION);
int thaw = 0; /* 1 if freeze succeeded, -1 if freeze failed */
bool pmsuspended = false;
virQEMUDriverConfigPtr cfg = NULL;
int compressed;
char *compressedpath = NULL;
virQEMUSaveDataPtr data = NULL;
/* If quiesce was requested, then issue a freeze command, and a
* counterpart thaw command when it is actually sent to agent.
* The command will fail if the guest is paused or the guest agent
* is not running, or is already quiesced. */
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE) {
int freeze = qemuDomainSnapshotFSFreeze(driver, vm, NULL, 0);
if (freeze < 0) {
/* the helper reported the error */
if (freeze == -2)
thaw = -1; /* the command is sent but agent failed */
goto cleanup;
}
thaw = 1;
}
/* We need to track what state the guest is in, since taking the
* snapshot may alter that state and we must restore it later. */
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_PMSUSPENDED) {
pmsuspended = true;
} else if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
/* For external checkpoints (those with memory), the guest
* must pause (either by libvirt up front, or by qemu after
* _LIVE converges). For disk-only snapshots with multiple
* disks, libvirt must pause externally to get all snapshots
* to be at the same point in time, unless qemu supports
* transactions. For a single disk, snapshot is atomic
* without requiring a pause. Thanks to
* qemuDomainSnapshotPrepare, if we got to this point, the
* atomic flag now says whether we need to pause, and a
* capability bit says whether to use transaction.
*/
if (memory)
resume = true;
if ((memory && !(flags & VIR_DOMAIN_SNAPSHOT_CREATE_LIVE)) ||
(!memory && atomic && !transaction)) {
if (qemuProcessStopCPUs(driver, vm, VIR_DOMAIN_PAUSED_SNAPSHOT,
QEMU_ASYNC_JOB_SNAPSHOT) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto cleanup;
}
resume = true;
}
}
/* do the memory snapshot if necessary */
if (memory) {
/* check if migration is possible */
if (!qemuMigrationIsAllowed(driver, vm, false, 0))
goto cleanup;
/* allow the migration job to be cancelled or the domain to be paused */
qemuDomainObjSetAsyncJobMask(vm, (QEMU_JOB_DEFAULT_MASK |
JOB_MASK(QEMU_JOB_SUSPEND) |
JOB_MASK(QEMU_JOB_MIGRATION_OP)));
cfg = virQEMUDriverGetConfig(driver);
if ((compressed = qemuGetCompressionProgram(cfg->snapshotImageFormat,
&compressedpath,
"snapshot", false)) < 0)
goto cleanup;
if (!(xml = qemuDomainDefFormatLive(driver, vm->def, priv->origCPU,
true, true)) ||
!(snap->def->cookie = (virObjectPtr) qemuDomainSaveCookieNew(vm)))
goto cleanup;
if (!(data = virQEMUSaveDataNew(xml,
(qemuDomainSaveCookiePtr) snap->def->cookie,
resume, compressed, driver->xmlopt)))
goto cleanup;
xml = NULL;
if ((ret = qemuDomainSaveMemory(driver, vm, snap->def->file, data,
compressedpath, 0,
QEMU_ASYNC_JOB_SNAPSHOT)) < 0)
goto cleanup;
/* the memory image was created, remove it on errors */
memory_unlink = true;
/* forbid any further manipulation */
qemuDomainObjSetAsyncJobMask(vm, QEMU_JOB_DEFAULT_MASK);
}
/* now the domain is now paused if:
* - if a memory snapshot was requested
* - an atomic snapshot was requested AND
* qemu does not support transactions
*
* Next we snapshot the disks.
*/
if ((ret = qemuDomainSnapshotCreateDiskActive(driver, vm, snap, flags,
QEMU_ASYNC_JOB_SNAPSHOT)) < 0)
goto cleanup;
/* the snapshot is complete now */
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_HALT) {
event = virDomainEventLifecycleNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT);
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT,
QEMU_ASYNC_JOB_SNAPSHOT, 0);
virDomainAuditStop(vm, "from-snapshot");
resume = false;
thaw = 0;
qemuDomainEventQueue(driver, event);
} else if (memory && pmsuspended) {
/* qemu 1.3 is unable to save a domain in pm-suspended (S3)
* state; so we must emit an event stating that it was
* converted to paused. */
virDomainObjSetState(vm, VIR_DOMAIN_PAUSED,
VIR_DOMAIN_PAUSED_FROM_SNAPSHOT);
event = virDomainEventLifecycleNewFromObj(vm, VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT);
qemuDomainEventQueue(driver, event);
}
ret = 0;
cleanup:
if (resume && virDomainObjIsActive(vm) &&
qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_SNAPSHOT) < 0) {
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR);
qemuDomainEventQueue(driver, event);
if (virGetLastError() == NULL) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("resuming after snapshot failed"));
}
ret = -1;
}
if (thaw != 0 &&
qemuDomainSnapshotFSThaw(driver, vm, ret == 0 && thaw > 0) < 0) {
/* helper reported the error, if it was needed */
if (thaw > 0)
ret = -1;
}
virQEMUSaveDataFree(data);
VIR_FREE(xml);
VIR_FREE(compressedpath);
virObjectUnref(cfg);
if (memory_unlink && ret < 0)
unlink(snap->def->file);
return ret;
}
static virDomainSnapshotPtr
qemuDomainSnapshotCreateXML(virDomainPtr domain,
const char *xmlDesc,
unsigned int flags)
{
virConnectPtr conn = domain->conn;
virQEMUDriverPtr driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
char *xml = NULL;
virDomainSnapshotObjPtr snap = NULL;
virDomainSnapshotPtr snapshot = NULL;
virDomainSnapshotDefPtr def = NULL;
bool update_current = true;
bool redefine = flags & VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE;
unsigned int parse_flags = VIR_DOMAIN_SNAPSHOT_PARSE_DISKS;
virDomainSnapshotObjPtr other = NULL;
int align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL;
bool align_match = true;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE |
VIR_DOMAIN_SNAPSHOT_CREATE_CURRENT |
VIR_DOMAIN_SNAPSHOT_CREATE_NO_METADATA |
VIR_DOMAIN_SNAPSHOT_CREATE_HALT |
VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY |
VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT |
VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE |
VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC |
VIR_DOMAIN_SNAPSHOT_CREATE_LIVE, NULL);
VIR_REQUIRE_FLAG_RET(VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE,
VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY,
NULL);
if ((redefine && !(flags & VIR_DOMAIN_SNAPSHOT_CREATE_CURRENT)) ||
(flags & VIR_DOMAIN_SNAPSHOT_CREATE_NO_METADATA))
update_current = false;
if (redefine)
parse_flags |= VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE;
if (!(vm = qemuDomObjFromDomain(domain)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSnapshotCreateXMLEnsureACL(domain->conn, vm->def, flags) < 0)
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (qemuProcessAutoDestroyActive(driver, vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is marked for auto destroy"));
goto cleanup;
}
if (!vm->persistent && (flags & VIR_DOMAIN_SNAPSHOT_CREATE_HALT)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot halt after transient domain snapshot"));
goto cleanup;
}
if ((flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) ||
!virDomainObjIsActive(vm))
parse_flags |= VIR_DOMAIN_SNAPSHOT_PARSE_OFFLINE;
if (!(def = virDomainSnapshotDefParseString(xmlDesc, caps, driver->xmlopt,
parse_flags)))
goto cleanup;
/* reject snapshot names containing slashes or starting with dot as
* snapshot definitions are saved in files named by the snapshot name */
if (!(flags & VIR_DOMAIN_SNAPSHOT_CREATE_NO_METADATA)) {
if (strchr(def->name, '/')) {
virReportError(VIR_ERR_XML_DETAIL,
_("invalid snapshot name '%s': "
"name can't contain '/'"),
def->name);
goto cleanup;
}
if (def->name[0] == '.') {
virReportError(VIR_ERR_XML_DETAIL,
_("invalid snapshot name '%s': "
"name can't start with '.'"),
def->name);
goto cleanup;
}
}
/* reject the VIR_DOMAIN_SNAPSHOT_CREATE_LIVE flag where not supported */
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_LIVE &&
(!virDomainObjIsActive(vm) ||
def->memory != VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL ||
redefine)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("live snapshot creation is supported only "
"with external checkpoints"));
goto cleanup;
}
/* allow snapshots only in certain states */
switch ((virDomainState) vm->state.state) {
/* valid states */
case VIR_DOMAIN_RUNNING:
case VIR_DOMAIN_PAUSED:
case VIR_DOMAIN_SHUTDOWN:
case VIR_DOMAIN_SHUTOFF:
case VIR_DOMAIN_CRASHED:
break;
case VIR_DOMAIN_PMSUSPENDED:
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("qemu doesn't support taking snapshots of "
"PMSUSPENDED guests"));
goto cleanup;
/* invalid states */
case VIR_DOMAIN_NOSTATE:
case VIR_DOMAIN_BLOCKED: /* invalid state, unused in qemu */
case VIR_DOMAIN_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR, _("Invalid domain state %s"),
virDomainStateTypeToString(vm->state.state));
goto cleanup;
}
/* We are going to modify the domain below. Internal snapshots would use
* a regular job, so we need to set the job mask to disallow query as
* 'savevm' blocks the monitor. External snapshot will then modify the
* job mask appropriately. */
if (qemuDomainObjBeginAsyncJob(driver, vm, QEMU_ASYNC_JOB_SNAPSHOT,
VIR_DOMAIN_JOB_OPERATION_SNAPSHOT) < 0)
goto cleanup;
qemuDomainObjSetAsyncJobMask(vm, QEMU_JOB_NONE);
priv = vm->privateData;
if (redefine) {
if (virDomainSnapshotRedefinePrep(domain, vm, &def, &snap,
driver->xmlopt,
&update_current, flags) < 0)
goto endjob;
} else {
/* Easiest way to clone inactive portion of vm->def is via
* conversion in and back out of xml. */
if (!(xml = qemuDomainDefFormatLive(driver, vm->def, priv->origCPU,
true, true)) ||
!(def->dom = virDomainDefParseString(xml, caps, driver->xmlopt, NULL,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
goto endjob;
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) {
align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
align_match = false;
if (virDomainObjIsActive(vm))
def->state = VIR_DOMAIN_DISK_SNAPSHOT;
else
def->state = VIR_DOMAIN_SHUTOFF;
def->memory = VIR_DOMAIN_SNAPSHOT_LOCATION_NONE;
} else if (def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL) {
def->state = virDomainObjGetState(vm, NULL);
align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
align_match = false;
} else {
def->state = virDomainObjGetState(vm, NULL);
if (virDomainObjIsActive(vm) &&
def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("internal snapshot of a running VM "
"must include the memory state"));
goto endjob;
}
def->memory = (def->state == VIR_DOMAIN_SHUTOFF ?
VIR_DOMAIN_SNAPSHOT_LOCATION_NONE :
VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL);
}
if (virDomainSnapshotAlignDisks(def, align_location,
align_match) < 0 ||
qemuDomainSnapshotPrepare(conn, vm, def, &flags) < 0)
goto endjob;
}
if (!snap) {
if (!(snap = virDomainSnapshotAssignDef(vm->snapshots, def)))
goto endjob;
def = NULL;
}
if (update_current)
snap->def->current = true;
if (vm->current_snapshot) {
if (!redefine &&
VIR_STRDUP(snap->def->parent, vm->current_snapshot->def->name) < 0)
goto endjob;
if (update_current) {
vm->current_snapshot->def->current = false;
if (qemuDomainSnapshotWriteMetadata(vm, vm->current_snapshot,
driver->caps, driver->xmlopt,
cfg->snapshotDir) < 0)
goto endjob;
vm->current_snapshot = NULL;
}
}
/* actually do the snapshot */
if (redefine) {
/* XXX Should we validate that the redefined snapshot even
* makes sense, such as checking that qemu-img recognizes the
* snapshot name in at least one of the domain's disks? */
} else if (virDomainObjIsActive(vm)) {
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY ||
snap->def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL) {
/* external checkpoint or disk snapshot */
if (qemuDomainSnapshotCreateActiveExternal(domain->conn, driver,
vm, snap, flags) < 0)
goto endjob;
} else {
/* internal checkpoint */
if (qemuDomainSnapshotCreateActiveInternal(domain->conn, driver,
vm, snap, flags) < 0)
goto endjob;
}
} else {
/* inactive; qemuDomainSnapshotPrepare guaranteed that we
* aren't mixing internal and external, and altered flags to
* contain DISK_ONLY if there is an external disk. */
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) {
bool reuse = !!(flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT);
if (qemuDomainSnapshotCreateInactiveExternal(driver, vm, snap,
reuse) < 0)
goto endjob;
} else {
if (qemuDomainSnapshotCreateInactiveInternal(driver, vm, snap) < 0)
goto endjob;
}
}
/* If we fail after this point, there's not a whole lot we can
* do; we've successfully taken the snapshot, and we are now running
* on it, so we have to go forward the best we can
*/
snapshot = virGetDomainSnapshot(domain, snap->def->name);
endjob:
if (snapshot && !(flags & VIR_DOMAIN_SNAPSHOT_CREATE_NO_METADATA)) {
if (qemuDomainSnapshotWriteMetadata(vm, snap, driver->caps,
driver->xmlopt,
cfg->snapshotDir) < 0) {
/* if writing of metadata fails, error out rather than trying
* to silently carry on without completing the snapshot */
virObjectUnref(snapshot);
snapshot = NULL;
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unable to save metadata for snapshot %s"),
snap->def->name);
virDomainSnapshotObjListRemove(vm->snapshots, snap);
} else {
if (update_current)
vm->current_snapshot = snap;
other = virDomainSnapshotFindByName(vm->snapshots,
snap->def->parent);
snap->parent = other;
other->nchildren++;
snap->sibling = other->first_child;
other->first_child = snap;
}
} else if (snap) {
virDomainSnapshotObjListRemove(vm->snapshots, snap);
}
qemuDomainObjEndAsyncJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virDomainSnapshotDefFree(def);
VIR_FREE(xml);
virObjectUnref(caps);
virObjectUnref(cfg);
return snapshot;
}
static int
qemuDomainSnapshotListNames(virDomainPtr domain,
char **names,
int nameslen,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_ROOTS |
VIR_DOMAIN_SNAPSHOT_FILTERS_ALL, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
if (virDomainSnapshotListNamesEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
n = virDomainSnapshotObjListGetNames(vm->snapshots, NULL, names, nameslen,
flags);
cleanup:
virDomainObjEndAPI(&vm);
return n;
}
static int
qemuDomainSnapshotNum(virDomainPtr domain,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_ROOTS |
VIR_DOMAIN_SNAPSHOT_FILTERS_ALL, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
if (virDomainSnapshotNumEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
n = virDomainSnapshotObjListNum(vm->snapshots, NULL, flags);
cleanup:
virDomainObjEndAPI(&vm);
return n;
}
static int
qemuDomainListAllSnapshots(virDomainPtr domain,
virDomainSnapshotPtr **snaps,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_ROOTS |
VIR_DOMAIN_SNAPSHOT_FILTERS_ALL, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
if (virDomainListAllSnapshotsEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
n = virDomainListSnapshots(vm->snapshots, NULL, domain, snaps, flags);
cleanup:
virDomainObjEndAPI(&vm);
return n;
}
static int
qemuDomainSnapshotListChildrenNames(virDomainSnapshotPtr snapshot,
char **names,
int nameslen,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
virDomainSnapshotObjPtr snap = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS |
VIR_DOMAIN_SNAPSHOT_FILTERS_ALL, -1);
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return -1;
if (virDomainSnapshotListChildrenNamesEnsureACL(snapshot->domain->conn, vm->def) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
n = virDomainSnapshotObjListGetNames(vm->snapshots, snap, names, nameslen,
flags);
cleanup:
virDomainObjEndAPI(&vm);
return n;
}
static int
qemuDomainSnapshotNumChildren(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
virDomainSnapshotObjPtr snap = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS |
VIR_DOMAIN_SNAPSHOT_FILTERS_ALL, -1);
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return -1;
if (virDomainSnapshotNumChildrenEnsureACL(snapshot->domain->conn, vm->def) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
n = virDomainSnapshotObjListNum(vm->snapshots, snap, flags);
cleanup:
virDomainObjEndAPI(&vm);
return n;
}
static int
qemuDomainSnapshotListAllChildren(virDomainSnapshotPtr snapshot,
virDomainSnapshotPtr **snaps,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
virDomainSnapshotObjPtr snap = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS |
VIR_DOMAIN_SNAPSHOT_FILTERS_ALL, -1);
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return -1;
if (virDomainSnapshotListAllChildrenEnsureACL(snapshot->domain->conn, vm->def) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
n = virDomainListSnapshots(vm->snapshots, snap, snapshot->domain, snaps,
flags);
cleanup:
virDomainObjEndAPI(&vm);
return n;
}
static virDomainSnapshotPtr
qemuDomainSnapshotLookupByName(virDomainPtr domain,
const char *name,
unsigned int flags)
{
virDomainObjPtr vm;
virDomainSnapshotObjPtr snap = NULL;
virDomainSnapshotPtr snapshot = NULL;
virCheckFlags(0, NULL);
if (!(vm = qemuDomObjFromDomain(domain)))
return NULL;
if (virDomainSnapshotLookupByNameEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromName(vm, name)))
goto cleanup;
snapshot = virGetDomainSnapshot(domain, snap->def->name);
cleanup:
virDomainObjEndAPI(&vm);
return snapshot;
}
static int
qemuDomainHasCurrentSnapshot(virDomainPtr domain,
unsigned int flags)
{
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
if (virDomainHasCurrentSnapshotEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
ret = (vm->current_snapshot != NULL);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static virDomainSnapshotPtr
qemuDomainSnapshotGetParent(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
virDomainObjPtr vm;
virDomainSnapshotObjPtr snap = NULL;
virDomainSnapshotPtr parent = NULL;
virCheckFlags(0, NULL);
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return NULL;
if (virDomainSnapshotGetParentEnsureACL(snapshot->domain->conn, vm->def) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
if (!snap->def->parent) {
virReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("snapshot '%s' does not have a parent"),
snap->def->name);
goto cleanup;
}
parent = virGetDomainSnapshot(snapshot->domain, snap->def->parent);
cleanup:
virDomainObjEndAPI(&vm);
return parent;
}
static virDomainSnapshotPtr
qemuDomainSnapshotCurrent(virDomainPtr domain,
unsigned int flags)
{
virDomainObjPtr vm;
virDomainSnapshotPtr snapshot = NULL;
virCheckFlags(0, NULL);
if (!(vm = qemuDomObjFromDomain(domain)))
return NULL;
if (virDomainSnapshotCurrentEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
if (!vm->current_snapshot) {
virReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT, "%s",
_("the domain does not have a current snapshot"));
goto cleanup;
}
snapshot = virGetDomainSnapshot(domain, vm->current_snapshot->def->name);
cleanup:
virDomainObjEndAPI(&vm);
return snapshot;
}
static char *
qemuDomainSnapshotGetXMLDesc(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
virQEMUDriverPtr driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm = NULL;
char *xml = NULL;
virDomainSnapshotObjPtr snap = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
virCheckFlags(VIR_DOMAIN_XML_SECURE, NULL);
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return NULL;
if (virDomainSnapshotGetXMLDescEnsureACL(snapshot->domain->conn, vm->def, flags) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
virUUIDFormat(snapshot->domain->uuid, uuidstr);
xml = virDomainSnapshotDefFormat(uuidstr, snap->def,
driver->caps, driver->xmlopt,
virDomainDefFormatConvertXMLFlags(flags),
0);
cleanup:
virDomainObjEndAPI(&vm);
return xml;
}
static int
qemuDomainSnapshotIsCurrent(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
virDomainSnapshotObjPtr snap = NULL;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return -1;
if (virDomainSnapshotIsCurrentEnsureACL(snapshot->domain->conn, vm->def) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
ret = (vm->current_snapshot &&
STREQ(snapshot->name, vm->current_snapshot->def->name));
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainSnapshotHasMetadata(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
virDomainSnapshotObjPtr snap = NULL;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return -1;
if (virDomainSnapshotHasMetadataEnsureACL(snapshot->domain->conn, vm->def) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
/* XXX Someday, we should recognize internal snapshots in qcow2
* images that are not tied to a libvirt snapshot; if we ever do
* that, then we would have a reason to return 0 here. */
ret = 1;
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* The domain is expected to be locked and inactive. */
static int
qemuDomainSnapshotRevertInactive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap)
{
/* Try all disks, but report failure if we skipped any. */
int ret = qemuDomainSnapshotForEachQcow2(driver, vm, snap, "-a", true);
return ret > 0 ? -1 : ret;
}
static int
qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
virQEMUDriverPtr driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
virDomainSnapshotObjPtr snap = NULL;
virObjectEventPtr event = NULL;
virObjectEventPtr event2 = NULL;
int detail;
qemuDomainObjPrivatePtr priv;
int rc;
virDomainDefPtr config = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
bool was_running = false;
bool was_stopped = false;
qemuDomainSaveCookiePtr cookie;
virCPUDefPtr origCPU = NULL;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED |
VIR_DOMAIN_SNAPSHOT_REVERT_FORCE, -1);
/* We have the following transitions, which create the following events:
* 1. inactive -> inactive: none
* 2. inactive -> running: EVENT_STARTED
* 3. inactive -> paused: EVENT_STARTED, EVENT_PAUSED
* 4. running -> inactive: EVENT_STOPPED
* 5. running -> running: none
* 6. running -> paused: EVENT_PAUSED
* 7. paused -> inactive: EVENT_STOPPED
* 8. paused -> running: EVENT_RESUMED
* 9. paused -> paused: none
* Also, several transitions occur even if we fail partway through,
* and use of FORCE can cause multiple transitions.
*/
virNWFilterReadLockFilterUpdates();
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainRevertToSnapshotEnsureACL(snapshot->domain->conn, vm->def) < 0)
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (qemuDomainHasBlockjob(vm, false)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain has active block job"));
goto cleanup;
}
if (qemuProcessBeginJob(driver, vm,
VIR_DOMAIN_JOB_OPERATION_SNAPSHOT_REVERT) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto endjob;
if (!vm->persistent &&
snap->def->state != VIR_DOMAIN_RUNNING &&
snap->def->state != VIR_DOMAIN_PAUSED &&
(flags & (VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED)) == 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("transient domain needs to request run or pause "
"to revert to inactive snapshot"));
goto endjob;
}
if (virDomainSnapshotIsExternal(snap)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("revert to external snapshot not supported yet"));
goto endjob;
}
if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_FORCE)) {
if (!snap->def->dom) {
virReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY,
_("snapshot '%s' lacks domain '%s' rollback info"),
snap->def->name, vm->def->name);
goto endjob;
}
if (virDomainObjIsActive(vm) &&
!(snap->def->state == VIR_DOMAIN_RUNNING
|| snap->def->state == VIR_DOMAIN_PAUSED) &&
(flags & (VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED))) {
virReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY, "%s",
_("must respawn qemu to start inactive snapshot"));
goto endjob;
}
}
if (vm->current_snapshot) {
vm->current_snapshot->def->current = false;
if (qemuDomainSnapshotWriteMetadata(vm, vm->current_snapshot,
driver->caps, driver->xmlopt,
cfg->snapshotDir) < 0)
goto endjob;
vm->current_snapshot = NULL;
/* XXX Should we restore vm->current_snapshot after this point
* in the failure cases where we know there was no change? */
}
/* Prepare to copy the snapshot inactive xml as the config of this
* domain.
*
* XXX Should domain snapshots track live xml rather
* than inactive xml? */
snap->def->current = true;
if (snap->def->dom) {
config = virDomainDefCopy(snap->def->dom, caps,
driver->xmlopt, NULL, true);
if (!config)
goto endjob;
}
cookie = (qemuDomainSaveCookiePtr) snap->def->cookie;
switch ((virDomainState) snap->def->state) {
case VIR_DOMAIN_RUNNING:
case VIR_DOMAIN_PAUSED:
/* Transitions 2, 3, 5, 6, 8, 9 */
/* When using the loadvm monitor command, qemu does not know
* whether to pause or run the reverted domain, and just stays
* in the same state as before the monitor command, whether
* that is paused or running. We always pause before loadvm,
* to have finer control. */
if (virDomainObjIsActive(vm)) {
/* Transitions 5, 6, 8, 9 */
/* Check for ABI compatibility. We need to do this check against
* the migratable XML or it will always fail otherwise */
if (config) {
bool compatible;
/* Replace the CPU in config and put the original one in priv
* once we're done. When we have the updated CPU def in the
* cookie, we don't want to replace the CPU in migratable def
* when doing ABI checks to make sure the current CPU exactly
* matches the one used at the time the snapshot was taken.
*/
if (cookie && cookie->cpu && config->cpu) {
origCPU = config->cpu;
if (!(config->cpu = virCPUDefCopy(cookie->cpu)))
goto endjob;
compatible = qemuDomainDefCheckABIStability(driver, vm->def,
config);
} else {
compatible = qemuDomainCheckABIStability(driver, vm, config);
}
if (!compatible) {
virErrorPtr err = virGetLastError();
if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_FORCE)) {
/* Re-spawn error using correct category. */
if (err->code == VIR_ERR_CONFIG_UNSUPPORTED)
virReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY, "%s",
err->str2);
goto endjob;
}
virResetError(err);
qemuProcessStop(driver, vm,
VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT,
QEMU_ASYNC_JOB_START, 0);
virDomainAuditStop(vm, "from-snapshot");
detail = VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
detail);
qemuDomainEventQueue(driver, event);
goto load;
}
}
priv = vm->privateData;
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
/* Transitions 5, 6 */
was_running = true;
if (qemuProcessStopCPUs(driver, vm,
VIR_DOMAIN_PAUSED_FROM_SNAPSHOT,
QEMU_ASYNC_JOB_START) < 0)
goto endjob;
/* Create an event now in case the restore fails, so
* that user will be alerted that they are now paused.
* If restore later succeeds, we might replace this. */
detail = VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
detail);
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
}
if (qemuDomainObjEnterMonitorAsync(driver, vm,
QEMU_ASYNC_JOB_START) < 0)
goto endjob;
rc = qemuMonitorLoadSnapshot(priv->mon, snap->def->name);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
if (rc < 0) {
/* XXX resume domain if it was running before the
* failed loadvm attempt? */
goto endjob;
}
if (config) {
virDomainObjAssignDef(vm, config, false, NULL);
virCPUDefFree(priv->origCPU);
VIR_STEAL_PTR(priv->origCPU, origCPU);
}
} else {
/* Transitions 2, 3 */
load:
was_stopped = true;
if (config)
virDomainObjAssignDef(vm, config, false, NULL);
rc = qemuProcessStart(snapshot->domain->conn, driver, vm,
cookie ? cookie->cpu : NULL,
QEMU_ASYNC_JOB_START, NULL, -1, NULL, snap,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE,
VIR_QEMU_PROCESS_START_PAUSED);
virDomainAuditStart(vm, "from-snapshot", rc >= 0);
detail = VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
detail);
if (rc < 0)
goto endjob;
}
/* Touch up domain state. */
if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING) &&
(snap->def->state == VIR_DOMAIN_PAUSED ||
(flags & VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED))) {
/* Transitions 3, 6, 9 */
virDomainObjSetState(vm, VIR_DOMAIN_PAUSED,
VIR_DOMAIN_PAUSED_FROM_SNAPSHOT);
if (was_stopped) {
/* Transition 3, use event as-is and add event2 */
detail = VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT;
event2 = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
detail);
} /* else transition 6 and 9 use event as-is */
} else {
/* Transitions 2, 5, 8 */
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
rc = qemuProcessStartCPUs(driver, vm, snapshot->domain->conn,
VIR_DOMAIN_RUNNING_FROM_SNAPSHOT,
QEMU_ASYNC_JOB_START);
if (rc < 0)
goto endjob;
virObjectUnref(event);
event = NULL;
if (was_stopped) {
/* Transition 2 */
detail = VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
detail);
} else if (!was_running) {
/* Transition 8 */
detail = VIR_DOMAIN_EVENT_RESUMED;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
detail);
}
}
break;
case VIR_DOMAIN_SHUTDOWN:
case VIR_DOMAIN_SHUTOFF:
case VIR_DOMAIN_CRASHED:
/* Transitions 1, 4, 7 */
/* Newer qemu -loadvm refuses to revert to the state of a snapshot
* created by qemu-img snapshot -c. If the domain is running, we
* must take it offline; then do the revert using qemu-img.
*/
if (virDomainObjIsActive(vm)) {
/* Transitions 4, 7 */
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT,
QEMU_ASYNC_JOB_START, 0);
virDomainAuditStop(vm, "from-snapshot");
detail = VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
detail);
}
if (qemuDomainSnapshotRevertInactive(driver, vm, snap) < 0) {
qemuProcessEndJob(driver, vm);
qemuDomainRemoveInactive(driver, vm);
goto cleanup;
}
if (config)
virDomainObjAssignDef(vm, config, false, NULL);
if (flags & (VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED)) {
/* Flush first event, now do transition 2 or 3 */
bool paused = (flags & VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED) != 0;
unsigned int start_flags = 0;
start_flags |= paused ? VIR_QEMU_PROCESS_START_PAUSED : 0;
qemuDomainEventQueue(driver, event);
rc = qemuProcessStart(snapshot->domain->conn, driver, vm, NULL,
QEMU_ASYNC_JOB_START, NULL, -1, NULL, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE,
start_flags);
virDomainAuditStart(vm, "from-snapshot", rc >= 0);
if (rc < 0) {
qemuProcessEndJob(driver, vm);
qemuDomainRemoveInactive(driver, vm);
goto cleanup;
}
detail = VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT;
event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
detail);
if (paused) {
detail = VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT;
event2 = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
detail);
}
}
break;
case VIR_DOMAIN_PMSUSPENDED:
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("qemu doesn't support reversion of snapshot taken in "
"PMSUSPENDED state"));
goto endjob;
case VIR_DOMAIN_NOSTATE:
case VIR_DOMAIN_BLOCKED:
case VIR_DOMAIN_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Invalid target domain state '%s'. Refusing "
"snapshot reversion"),
virDomainStateTypeToString(snap->def->state));
goto endjob;
}
ret = 0;
endjob:
qemuProcessEndJob(driver, vm);
cleanup:
if (ret == 0) {
if (qemuDomainSnapshotWriteMetadata(vm, snap, driver->caps,
driver->xmlopt,
cfg->snapshotDir) < 0)
ret = -1;
else
vm->current_snapshot = snap;
} else if (snap) {
snap->def->current = false;
}
if (ret == 0 && config && vm->persistent &&
!(ret = virDomainSaveConfig(cfg->configDir, driver->caps,
vm->newDef ? vm->newDef : vm->def))) {
detail = VIR_DOMAIN_EVENT_DEFINED_FROM_SNAPSHOT;
qemuDomainEventQueue(driver,
virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
detail));
}
if (event) {
qemuDomainEventQueue(driver, event);
qemuDomainEventQueue(driver, event2);
}
virDomainObjEndAPI(&vm);
virObjectUnref(caps);
virObjectUnref(cfg);
virNWFilterUnlockFilterUpdates();
virCPUDefFree(origCPU);
return ret;
}
typedef struct _virQEMUSnapReparent virQEMUSnapReparent;
typedef virQEMUSnapReparent *virQEMUSnapReparentPtr;
struct _virQEMUSnapReparent {
virQEMUDriverConfigPtr cfg;
virDomainSnapshotObjPtr parent;
virDomainObjPtr vm;
virCapsPtr caps;
virDomainXMLOptionPtr xmlopt;
int err;
virDomainSnapshotObjPtr last;
};
static int
qemuDomainSnapshotReparentChildren(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *data)
{
virDomainSnapshotObjPtr snap = payload;
virQEMUSnapReparentPtr rep = data;
if (rep->err < 0)
return 0;
VIR_FREE(snap->def->parent);
snap->parent = rep->parent;
if (rep->parent->def &&
VIR_STRDUP(snap->def->parent, rep->parent->def->name) < 0) {
rep->err = -1;
return 0;
}
if (!snap->sibling)
rep->last = snap;
rep->err = qemuDomainSnapshotWriteMetadata(rep->vm, snap,
rep->caps, rep->xmlopt,
rep->cfg->snapshotDir);
return 0;
}
static int
qemuDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
virQEMUDriverPtr driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
virDomainSnapshotObjPtr snap = NULL;
virQEMUSnapRemove rem;
virQEMUSnapReparent rep;
bool metadata_only = !!(flags & VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY);
int external = 0;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN |
VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY |
VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY, -1);
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSnapshotDeleteEnsureACL(snapshot->domain->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto endjob;
if (!metadata_only) {
if (!(flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY) &&
virDomainSnapshotIsExternal(snap))
external++;
if (flags & (VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN |
VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY))
virDomainSnapshotForEachDescendant(snap,
qemuDomainSnapshotCountExternal,
&external);
if (external) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("deletion of %d external disk snapshots not "
"supported yet"), external);
goto endjob;
}
}
if (flags & (VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN |
VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY)) {
rem.driver = driver;
rem.vm = vm;
rem.metadata_only = metadata_only;
rem.err = 0;
rem.current = false;
virDomainSnapshotForEachDescendant(snap,
qemuDomainSnapshotDiscardAll,
&rem);
if (rem.err < 0)
goto endjob;
if (rem.current) {
if (flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY) {
snap->def->current = true;
if (qemuDomainSnapshotWriteMetadata(vm, snap, driver->caps,
driver->xmlopt,
cfg->snapshotDir) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("failed to set snapshot '%s' as current"),
snap->def->name);
snap->def->current = false;
goto endjob;
}
}
vm->current_snapshot = snap;
}
} else if (snap->nchildren) {
rep.cfg = cfg;
rep.parent = snap->parent;
rep.vm = vm;
rep.err = 0;
rep.last = NULL;
rep.caps = driver->caps;
rep.xmlopt = driver->xmlopt;
virDomainSnapshotForEachChild(snap,
qemuDomainSnapshotReparentChildren,
&rep);
if (rep.err < 0)
goto endjob;
/* Can't modify siblings during ForEachChild, so do it now. */
snap->parent->nchildren += snap->nchildren;
rep.last->sibling = snap->parent->first_child;
snap->parent->first_child = snap->first_child;
}
if (flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY) {
snap->nchildren = 0;
snap->first_child = NULL;
ret = 0;
} else {
virDomainSnapshotDropParent(snap);
ret = qemuDomainSnapshotDiscard(driver, vm, snap, true, metadata_only);
}
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(cfg);
return ret;
}
static int qemuDomainQemuMonitorCommand(virDomainPtr domain, const char *cmd,
char **result, unsigned int flags)
{
virQEMUDriverPtr driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool hmp;
virCheckFlags(VIR_DOMAIN_QEMU_MONITOR_COMMAND_HMP, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
goto cleanup;
if (virDomainQemuMonitorCommandEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
priv = vm->privateData;
qemuDomainObjTaint(driver, vm, VIR_DOMAIN_TAINT_CUSTOM_MONITOR, NULL);
hmp = !!(flags & VIR_DOMAIN_QEMU_MONITOR_COMMAND_HMP);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorArbitraryCommand(priv->mon, cmd, result, hmp);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static virDomainPtr qemuDomainQemuAttach(virConnectPtr conn,
unsigned int pid_value,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainPtr dom = NULL;
virDomainChrSourceDefPtr monConfig = NULL;
bool monJSON = false;
pid_t pid = pid_value;
char *pidfile = NULL;
virQEMUCapsPtr qemuCaps = NULL;
virCapsPtr caps = NULL;
virCheckFlags(0, NULL);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = qemuParseCommandLinePid(caps, driver->xmlopt, pid,
&pidfile, &monConfig, &monJSON)))
goto cleanup;
if (virDomainQemuAttachEnsureACL(conn, def) < 0)
goto cleanup;
if (!monConfig) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("No monitor connection for pid %u"), pid_value);
goto cleanup;
}
if (monConfig->type != VIR_DOMAIN_CHR_TYPE_UNIX) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Cannot connect to monitor connection of type '%s' "
"for pid %u"),
virDomainChrTypeToString(monConfig->type),
pid_value);
goto cleanup;
}
if (!(def->name) &&
virAsprintf(&def->name, "attach-pid-%u", pid_value) < 0)
goto cleanup;
if (!(qemuCaps = virQEMUCapsCacheLookup(caps, driver->qemuCapsCache,
def->emulator)))
goto cleanup;
if (qemuAssignDeviceAliases(def, qemuCaps) < 0)
goto cleanup;
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
VIR_DOMAIN_OBJ_LIST_ADD_LIVE |
VIR_DOMAIN_OBJ_LIST_ADD_CHECK_LIVE,
NULL)))
goto cleanup;
virObjectRef(vm);
def = NULL;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0) {
qemuDomainRemoveInactive(driver, vm);
goto cleanup;
}
if (qemuProcessAttach(conn, driver, vm, pid,
pidfile, monConfig, monJSON) < 0) {
monConfig = NULL;
qemuDomainObjEndJob(driver, vm);
qemuDomainRemoveInactive(driver, vm);
goto cleanup;
}
monConfig = NULL;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid, vm->def->id);
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainDefFree(def);
virDomainChrSourceDefFree(monConfig);
virDomainObjEndAPI(&vm);
VIR_FREE(pidfile);
virObjectUnref(caps);
virObjectUnref(qemuCaps);
return dom;
}
static int
qemuDomainOpenConsole(virDomainPtr dom,
const char *dev_name,
virStreamPtr st,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
size_t i;
virDomainChrDefPtr chr = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_CONSOLE_SAFE |
VIR_DOMAIN_CONSOLE_FORCE, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainOpenConsoleEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
priv = vm->privateData;
if (dev_name) {
for (i = 0; !chr && i < vm->def->nconsoles; i++) {
if (vm->def->consoles[i]->info.alias &&
STREQ(dev_name, vm->def->consoles[i]->info.alias))
chr = vm->def->consoles[i];
}
for (i = 0; !chr && i < vm->def->nserials; i++) {
if (STREQ(dev_name, vm->def->serials[i]->info.alias))
chr = vm->def->serials[i];
}
for (i = 0; !chr && i < vm->def->nparallels; i++) {
if (STREQ(dev_name, vm->def->parallels[i]->info.alias))
chr = vm->def->parallels[i];
}
} else {
if (vm->def->nconsoles)
chr = vm->def->consoles[0];
else if (vm->def->nserials)
chr = vm->def->serials[0];
}
if (!chr) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find character device %s"),
NULLSTR(dev_name));
goto cleanup;
}
if (chr->source->type != VIR_DOMAIN_CHR_TYPE_PTY) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("character device %s is not using a PTY"),
dev_name ? dev_name : NULLSTR(chr->info.alias));
goto cleanup;
}
/* handle mutually exclusive access to console devices */
ret = virChrdevOpen(priv->devs,
chr->source,
st,
(flags & VIR_DOMAIN_CONSOLE_FORCE) != 0);
if (ret == 1) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Active console session exists for this domain"));
ret = -1;
}
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainOpenChannel(virDomainPtr dom,
const char *name,
virStreamPtr st,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
size_t i;
virDomainChrDefPtr chr = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_CHANNEL_FORCE, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainOpenChannelEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
priv = vm->privateData;
if (name) {
for (i = 0; !chr && i < vm->def->nchannels; i++) {
if (STREQ(name, vm->def->channels[i]->info.alias))
chr = vm->def->channels[i];
if (vm->def->channels[i]->targetType == \
VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO &&
STREQ_NULLABLE(name, vm->def->channels[i]->target.name))
chr = vm->def->channels[i];
}
} else {
if (vm->def->nchannels)
chr = vm->def->channels[0];
}
if (!chr) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find channel %s"),
NULLSTR(name));
goto cleanup;
}
if (chr->source->type != VIR_DOMAIN_CHR_TYPE_UNIX) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("channel %s is not using a UNIX socket"),
name ? name : NULLSTR(chr->info.alias));
goto cleanup;
}
/* handle mutually exclusive access to channel devices */
ret = virChrdevOpen(priv->devs,
chr->source,
st,
(flags & VIR_DOMAIN_CHANNEL_FORCE) != 0);
if (ret == 1) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Active channel stream exists for this domain"));
ret = -1;
}
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* Called while holding the VM job lock, to implement a block job
* abort with pivot; this updates the VM definition as appropriate, on
* either success or failure. */
static int
qemuDomainBlockPivot(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *device,
virDomainDiskDefPtr disk)
{
int ret = -1, rc;
qemuDomainObjPrivatePtr priv = vm->privateData;
qemuMonitorBlockJobInfo info;
virStorageSourcePtr oldsrc = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
if (!disk->mirror) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("pivot of disk '%s' requires an active copy job"),
disk->dst);
goto cleanup;
}
/* Probe the status, if needed. */
if (!disk->mirrorState) {
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorGetBlockJobInfo(priv->mon, disk->info.alias, &info);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto cleanup;
if (rc < 0)
goto cleanup;
if (rc == 1 &&
(info.ready == 1 ||
(info.ready == -1 &&
info.end == info.cur &&
(info.type == VIR_DOMAIN_BLOCK_JOB_TYPE_COPY ||
info.type == VIR_DOMAIN_BLOCK_JOB_TYPE_COMMIT))))
disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_READY;
}
if (disk->mirrorState != VIR_DOMAIN_DISK_MIRROR_STATE_READY) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE,
_("disk '%s' not ready for pivot yet"),
disk->dst);
goto cleanup;
}
/* For active commit, the mirror is part of the already labeled
* chain. For blockcopy, we previously labeled only the top-level
* image; but if the user is reusing an external image that
* includes a backing file, the pivot may result in qemu needing
* to open the entire backing chain, so we need to label the
* entire chain. This action is safe even if the backing chain
* has already been labeled; but only necessary when we know for
* sure that there is a backing chain. */
if (disk->mirrorJob == VIR_DOMAIN_BLOCK_JOB_TYPE_COPY) {
oldsrc = disk->src;
disk->src = disk->mirror;
if (qemuDomainDetermineDiskChain(driver, vm, disk, false, true) < 0)
goto cleanup;
if (disk->mirror->format &&
disk->mirror->format != VIR_STORAGE_FILE_RAW &&
(qemuDomainNamespaceSetupDisk(driver, vm, disk->src) < 0 ||
qemuSetupDiskCgroup(vm, disk) < 0 ||
qemuSecuritySetDiskLabel(driver, vm, disk) < 0))
goto cleanup;
disk->src = oldsrc;
oldsrc = NULL;
}
/* Attempt the pivot. Record the attempt now, to prevent duplicate
* attempts; but the actual disk change will be made when emitting
* the event.
* XXX On libvirtd restarts, if we missed the qemu event, we need
* to double check what state qemu is in.
* XXX We should be using qemu's rerror flag to make sure the job
* remains alive until we know its final state.
* XXX If the abort command is synchronous but the qemu event says
* that pivot failed, we need to reflect that failure into the
* overall return value. */
disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_PIVOT;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorDrivePivot(priv->mon, device);
if (qemuDomainObjExitMonitor(driver, vm) < 0) {
ret = -1;
goto cleanup;
}
if (ret < 0) {
/* The pivot failed. The block job in QEMU remains in the synchronised
* phase. Reset the state we changed and return the error to the user */
disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_READY;
}
cleanup:
if (oldsrc)
disk->src = oldsrc;
virObjectUnref(cfg);
return ret;
}
/* bandwidth in MiB/s per public API. Caller must lock vm beforehand,
* and not access it afterwards. */
static int
qemuDomainBlockPullCommon(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *path,
const char *base,
unsigned long bandwidth,
unsigned int flags)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
char *device = NULL;
bool modern;
virDomainDiskDefPtr disk;
virStorageSourcePtr baseSource = NULL;
unsigned int baseIndex = 0;
char *basePath = NULL;
char *backingPath = NULL;
unsigned long long speed = bandwidth;
int ret = -1;
if (flags & VIR_DOMAIN_BLOCK_REBASE_RELATIVE && !base) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("flag VIR_DOMAIN_BLOCK_REBASE_RELATIVE is valid only "
"with non-null base"));
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
if (qemuDomainSupportsBlockJobs(vm, &modern) < 0)
goto endjob;
if (!modern) {
if (base) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("partial block pull not supported with this "
"QEMU binary"));
goto endjob;
}
if (bandwidth) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("setting bandwidth at start of block pull not "
"supported with this QEMU binary"));
goto endjob;
}
}
if (!(disk = qemuDomainDiskByName(vm->def, path)))
goto endjob;
if (!(device = qemuAliasFromDisk(disk)))
goto endjob;
if (qemuDomainDiskBlockJobIsActive(disk))
goto endjob;
if (base &&
(virStorageFileParseChainIndex(disk->dst, base, &baseIndex) < 0 ||
!(baseSource = virStorageFileChainLookup(disk->src, disk->src,
base, baseIndex, NULL))))
goto endjob;
if (baseSource) {
if (flags & VIR_DOMAIN_BLOCK_REBASE_RELATIVE) {
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_CHANGE_BACKING_FILE)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("this QEMU binary doesn't support relative "
"block pull/rebase"));
goto endjob;
}
if (virStorageFileGetRelativeBackingPath(disk->src->backingStore,
baseSource,
&backingPath) < 0)
goto endjob;
if (!backingPath) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("can't keep relative backing relationship"));
goto endjob;
}
}
}
/* Convert bandwidth MiB to bytes, if needed */
if (!(flags & VIR_DOMAIN_BLOCK_PULL_BANDWIDTH_BYTES)) {
if (speed > LLONG_MAX >> 20) {
virReportError(VIR_ERR_OVERFLOW,
_("bandwidth must be less than %llu"),
LLONG_MAX >> 20);
goto endjob;
}
speed <<= 20;
}
qemuDomainObjEnterMonitor(driver, vm);
if (baseSource)
basePath = qemuMonitorDiskNameLookup(priv->mon, device, disk->src,
baseSource);
if (!baseSource || basePath)
ret = qemuMonitorBlockStream(priv->mon, device, basePath, backingPath,
speed, modern);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
if (ret < 0)
goto endjob;
QEMU_DOMAIN_DISK_PRIVATE(disk)->blockjob = true;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(basePath);
VIR_FREE(backingPath);
VIR_FREE(device);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainBlockJobAbort(virDomainPtr dom,
const char *path,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
char *device = NULL;
virDomainDiskDefPtr disk = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
bool save = false;
bool modern;
bool pivot = !!(flags & VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT);
bool async = !!(flags & VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC);
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC |
VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainBlockJobAbortEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
if (qemuDomainSupportsBlockJobs(vm, &modern) < 0)
goto endjob;
if (!(disk = qemuDomainDiskByName(vm->def, path)))
goto endjob;
if (!(device = qemuAliasFromDisk(disk)))
goto endjob;
if (disk->mirrorState != VIR_DOMAIN_DISK_MIRROR_STATE_NONE &&
disk->mirrorState != VIR_DOMAIN_DISK_MIRROR_STATE_READY) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("another job on disk '%s' is still being ended"),
disk->dst);
goto endjob;
}
if (modern && !async)
qemuBlockJobSyncBegin(disk);
if (pivot) {
if ((ret = qemuDomainBlockPivot(driver, vm, device, disk)) < 0)
goto endjob;
} else {
if (disk->mirror) {
disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_ABORT;
save = true;
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorBlockJobCancel(qemuDomainGetMonitor(vm), device, modern);
if (qemuDomainObjExitMonitor(driver, vm) < 0) {
ret = -1;
goto endjob;
}
if (ret < 0) {
if (disk->mirror)
disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_NONE;
goto endjob;
}
}
/* If we have made changes to XML due to a copy job, make a best
* effort to save it now. But we can ignore failure, since there
* will be further changes when the event marks completion. */
if (save)
ignore_value(virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps));
/* With synchronous block cancel, we must synthesize an event, and
* we silently ignore the ABORT_ASYNC flag. With asynchronous
* block cancel, the event will come from qemu and will update the
* XML as appropriate, but without the ABORT_ASYNC flag, we must
* block to guarantee synchronous operation. We do the waiting
* while still holding the VM job, to prevent newly scheduled
* block jobs from confusing us. */
if (!async) {
if (!modern) {
/* Older qemu that lacked async reporting also lacked
* blockcopy and active commit, so we can hardcode the
* event to pull and let qemuBlockJobEventProcess() handle
* the rest as usual */
qemuBlockJobEventProcess(driver, vm, disk,
QEMU_ASYNC_JOB_NONE,
VIR_DOMAIN_BLOCK_JOB_TYPE_PULL,
VIR_DOMAIN_BLOCK_JOB_CANCELED);
} else {
qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
qemuBlockJobUpdate(driver, vm, QEMU_ASYNC_JOB_NONE, disk);
while (diskPriv->blockjob) {
if (virDomainObjWait(vm) < 0) {
ret = -1;
goto endjob;
}
qemuBlockJobUpdate(driver, vm, QEMU_ASYNC_JOB_NONE, disk);
}
}
}
endjob:
if (disk)
qemuBlockJobSyncEnd(driver, vm, QEMU_ASYNC_JOB_NONE, disk);
qemuDomainObjEndJob(driver, vm);
cleanup:
virObjectUnref(cfg);
VIR_FREE(device);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuBlockJobInfoTranslate(qemuMonitorBlockJobInfoPtr rawInfo,
virDomainBlockJobInfoPtr info,
virDomainDiskDefPtr disk,
bool reportBytes)
{
info->cur = rawInfo->cur;
info->end = rawInfo->end;
/* Fix job completeness reporting. If cur == end mgmt
* applications think job is completed. Except when both cur
* and end are zero, in which case qemu hasn't started the
* job yet. */
if (!info->cur && !info->end) {
if (rawInfo->ready > 0) {
info->cur = info->end = 1;
} else if (!rawInfo->ready) {
info->end = 1;
}
}
info->type = rawInfo->type;
if (info->type == VIR_DOMAIN_BLOCK_JOB_TYPE_COMMIT &&
disk->mirrorJob == VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT)
info->type = disk->mirrorJob;
if (rawInfo->bandwidth && !reportBytes)
rawInfo->bandwidth = VIR_DIV_UP(rawInfo->bandwidth, 1024 * 1024);
info->bandwidth = rawInfo->bandwidth;
if (info->bandwidth != rawInfo->bandwidth) {
virReportError(VIR_ERR_OVERFLOW,
_("bandwidth %llu cannot be represented in result"),
rawInfo->bandwidth);
return -1;
}
return 0;
}
static int
qemuDomainGetBlockJobInfo(virDomainPtr dom,
const char *path,
virDomainBlockJobInfoPtr info,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDiskDefPtr disk;
int ret = -1;
qemuMonitorBlockJobInfo rawInfo;
virCheckFlags(VIR_DOMAIN_BLOCK_JOB_INFO_BANDWIDTH_BYTES, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainGetBlockJobInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
if (qemuDomainSupportsBlockJobs(vm, NULL) < 0)
goto endjob;
if (!(disk = virDomainDiskByName(vm->def, path, true))) {
virReportError(VIR_ERR_INVALID_ARG,
_("disk %s not found in the domain"), path);
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetBlockJobInfo(qemuDomainGetMonitor(vm),
disk->info.alias, &rawInfo);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
if (ret <= 0)
goto endjob;
if (qemuBlockJobInfoTranslate(&rawInfo, info, disk,
flags & VIR_DOMAIN_BLOCK_JOB_INFO_BANDWIDTH_BYTES) < 0) {
ret = -1;
goto endjob;
}
/* Snoop block copy operations, so future cancel operations can
* avoid checking if pivot is safe. Save the change to XML, but
* we can ignore failure because it is only an optimization. We
* hold the vm lock, so modifying the in-memory representation is
* safe, even if we are a query rather than a modify job. */
if (disk->mirror &&
rawInfo.ready != 0 &&
info->cur == info->end && !disk->mirrorState) {
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_READY;
ignore_value(virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps));
virObjectUnref(cfg);
}
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainBlockJobSetSpeed(virDomainPtr dom,
const char *path,
unsigned long bandwidth,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainDiskDefPtr disk;
int ret = -1;
virDomainObjPtr vm;
bool modern;
const char *device;
unsigned long long speed = bandwidth;
virCheckFlags(VIR_DOMAIN_BLOCK_JOB_SPEED_BANDWIDTH_BYTES, -1);
/* Convert bandwidth MiB to bytes, if needed */
if (!(flags & VIR_DOMAIN_BLOCK_JOB_SPEED_BANDWIDTH_BYTES)) {
if (speed > LLONG_MAX >> 20) {
virReportError(VIR_ERR_OVERFLOW,
_("bandwidth must be less than %llu"),
LLONG_MAX >> 20);
return -1;
}
speed <<= 20;
}
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainBlockJobSetSpeedEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
if (qemuDomainSupportsBlockJobs(vm, &modern) < 0)
goto endjob;
if (!(disk = qemuDomainDiskByName(vm->def, path)))
goto endjob;
if (!(device = qemuAliasFromDisk(disk)))
goto endjob;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorBlockJobSetSpeed(qemuDomainGetMonitor(vm),
device,
speed,
modern);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
/* bandwidth in bytes/s. Caller must lock vm beforehand, and not
* access mirror afterwards. */
static int
qemuDomainBlockCopyCommon(virDomainObjPtr vm,
virConnectPtr conn,
const char *path,
virStorageSourcePtr mirror,
unsigned long long bandwidth,
unsigned int granularity,
unsigned long long buf_size,
unsigned int flags,
bool keepParentLabel)
{
virQEMUDriverPtr driver = conn->privateData;
qemuDomainObjPrivatePtr priv;
char *device = NULL;
virDomainDiskDefPtr disk = NULL;
int ret = -1;
struct stat st;
bool need_unlink = false;
virQEMUDriverConfigPtr cfg = NULL;
const char *format = NULL;
int desttype = virStorageSourceGetActualType(mirror);
virErrorPtr monitor_error = NULL;
/* Preliminaries: find the disk we are editing, sanity checks */
virCheckFlags(VIR_DOMAIN_BLOCK_COPY_SHALLOW |
VIR_DOMAIN_BLOCK_COPY_REUSE_EXT |
VIR_DOMAIN_BLOCK_COPY_TRANSIENT_JOB, -1);
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (virStorageSourceIsRelative(mirror)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("absolute path must be used as block copy target"));
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
if (!(disk = qemuDomainDiskByName(vm->def, path)))
goto endjob;
if (!(device = qemuAliasFromDisk(disk)))
goto endjob;
if (qemuDomainDiskBlockJobIsActive(disk))
goto endjob;
if (disk->device == VIR_DOMAIN_DISK_DEVICE_LUN &&
qemuDomainDefValidateDiskLunSource(mirror) < 0)
goto endjob;
if (!(virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DRIVE_MIRROR) &&
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_ASYNC))) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("block copy is not supported with this QEMU binary"));
goto endjob;
}
if (!(flags & VIR_DOMAIN_BLOCK_COPY_TRANSIENT_JOB) &&
vm->persistent) {
/* XXX if qemu ever lets us start a new domain with mirroring
* already active, we can relax this; but for now, the risk of
* 'managedsave' due to libvirt-guests means we can't risk
* this on persistent domains. */
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not transient"));
goto endjob;
}
/* clear the _SHALLOW flag if there is only one layer */
if (!disk->src->backingStore)
flags &= ~VIR_DOMAIN_BLOCK_COPY_SHALLOW;
/* unless the user provides a pre-created file, shallow copy into a raw
* file is not possible */
if ((flags & VIR_DOMAIN_BLOCK_COPY_SHALLOW) &&
!(flags & VIR_DOMAIN_BLOCK_COPY_REUSE_EXT) &&
mirror->format == VIR_STORAGE_FILE_RAW) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("shallow copy of disk '%s' into a raw file "
"is not possible"),
disk->dst);
goto endjob;
}
/* Prepare the destination file. */
/* XXX Allow non-file mirror destinations */
if (!virStorageSourceIsLocalStorage(mirror)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("non-file destination not supported yet"));
goto endjob;
}
if (stat(mirror->path, &st) < 0) {
if (errno != ENOENT) {
virReportSystemError(errno, _("unable to stat for disk %s: %s"),
disk->dst, mirror->path);
goto endjob;
} else if (flags & VIR_DOMAIN_BLOCK_COPY_REUSE_EXT ||
desttype == VIR_STORAGE_TYPE_BLOCK) {
virReportSystemError(errno,
_("missing destination file for disk %s: %s"),
disk->dst, mirror->path);
goto endjob;
}
} else if (!S_ISBLK(st.st_mode)) {
if (st.st_size && !(flags & VIR_DOMAIN_BLOCK_COPY_REUSE_EXT)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("external destination file for disk %s already "
"exists and is not a block device: %s"),
disk->dst, mirror->path);
goto endjob;
}
if (desttype == VIR_STORAGE_TYPE_BLOCK) {
virReportError(VIR_ERR_INVALID_ARG,
_("blockdev flag requested for disk %s, but file "
"'%s' is not a block device"),
disk->dst, mirror->path);
goto endjob;
}
}
if (!mirror->format) {
if (!(flags & VIR_DOMAIN_BLOCK_COPY_REUSE_EXT)) {
mirror->format = disk->src->format;
} else {
/* If the user passed the REUSE_EXT flag, then either they
* can also pass the RAW flag or use XML to tell us the format.
* So if we get here, we assume it is safe for us to probe the
* format from the file that we will be using. */
mirror->format = virStorageFileProbeFormat(mirror->path, cfg->user,
cfg->group);
}
}
/* pre-create the image file */
if (!(flags & VIR_DOMAIN_BLOCK_COPY_REUSE_EXT)) {
int fd = qemuOpenFile(driver, vm, mirror->path,
O_WRONLY | O_TRUNC | O_CREAT,
&need_unlink, NULL);
if (fd < 0)
goto endjob;
VIR_FORCE_CLOSE(fd);
}
if (mirror->format > 0)
format = virStorageFileFormatTypeToString(mirror->format);
if (virStorageSourceInitChainElement(mirror, disk->src,
keepParentLabel) < 0)
goto endjob;
if (qemuDomainDiskChainElementPrepare(driver, vm, mirror, false) < 0) {
qemuDomainDiskChainElementRevoke(driver, vm, mirror);
goto endjob;
}
/* Actually start the mirroring */
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorDriveMirror(priv->mon, device, mirror->path, format,
bandwidth, granularity, buf_size, flags);
virDomainAuditDisk(vm, NULL, mirror, "mirror", ret >= 0);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
if (ret < 0) {
monitor_error = virSaveLastError();
qemuDomainDiskChainElementRevoke(driver, vm, mirror);
goto endjob;
}
/* Update vm in place to match changes. */
need_unlink = false;
disk->mirror = mirror;
mirror = NULL;
disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_COPY;
QEMU_DOMAIN_DISK_PRIVATE(disk)->blockjob = true;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
VIR_WARN("Unable to save status on vm %s after state change",
vm->def->name);
endjob:
if (need_unlink && unlink(mirror->path))
VIR_WARN("unable to unlink just-created %s", mirror->path);
qemuDomainObjEndJob(driver, vm);
if (monitor_error) {
virSetError(monitor_error);
virFreeError(monitor_error);
}
cleanup:
VIR_FREE(device);
virObjectUnref(cfg);
virStorageSourceFree(mirror);
return ret;
}
static int
qemuDomainBlockRebase(virDomainPtr dom, const char *path, const char *base,
unsigned long bandwidth, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
unsigned long long speed = bandwidth;
virStorageSourcePtr dest = NULL;
virCheckFlags(VIR_DOMAIN_BLOCK_REBASE_SHALLOW |
VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT |
VIR_DOMAIN_BLOCK_REBASE_COPY |
VIR_DOMAIN_BLOCK_REBASE_COPY_RAW |
VIR_DOMAIN_BLOCK_REBASE_RELATIVE |
VIR_DOMAIN_BLOCK_REBASE_COPY_DEV |
VIR_DOMAIN_BLOCK_REBASE_BANDWIDTH_BYTES, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainBlockRebaseEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
/* For normal rebase (enhanced blockpull), the common code handles
* everything, including vm cleanup. */
if (!(flags & VIR_DOMAIN_BLOCK_REBASE_COPY))
return qemuDomainBlockPullCommon(driver, vm, path, base, bandwidth, flags);
/* If we got here, we are doing a block copy rebase. */
if (VIR_ALLOC(dest) < 0)
goto cleanup;
dest->type = (flags & VIR_DOMAIN_BLOCK_REBASE_COPY_DEV) ?
VIR_STORAGE_TYPE_BLOCK : VIR_STORAGE_TYPE_FILE;
if (VIR_STRDUP(dest->path, base) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_BLOCK_REBASE_COPY_RAW)
dest->format = VIR_STORAGE_FILE_RAW;
/* Convert bandwidth MiB to bytes, if necessary */
if (!(flags & VIR_DOMAIN_BLOCK_REBASE_BANDWIDTH_BYTES)) {
if (speed > LLONG_MAX >> 20) {
virReportError(VIR_ERR_OVERFLOW,
_("bandwidth must be less than %llu"),
LLONG_MAX >> 20);
goto cleanup;
}
speed <<= 20;
}
/* XXX: If we are doing a shallow copy but not reusing an external
* file, we should attempt to pre-create the destination with a
* relative backing chain instead of qemu's default of absolute */
if (flags & VIR_DOMAIN_BLOCK_REBASE_RELATIVE) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Relative backing during copy not supported yet"));
goto cleanup;
}
/* We rely on the fact that VIR_DOMAIN_BLOCK_REBASE_SHALLOW
* and VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT map to the same values
* as for block copy. */
flags &= (VIR_DOMAIN_BLOCK_REBASE_SHALLOW |
VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT);
ret = qemuDomainBlockCopyCommon(vm, dom->conn, path, dest,
speed, 0, 0, flags, true);
dest = NULL;
cleanup:
virDomainObjEndAPI(&vm);
virStorageSourceFree(dest);
return ret;
}
static int
qemuDomainBlockCopy(virDomainPtr dom, const char *disk, const char *destxml,
virTypedParameterPtr params, int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
unsigned long long bandwidth = 0;
unsigned int granularity = 0;
unsigned long long buf_size = 0;
virStorageSourcePtr dest = NULL;
size_t i;
virCheckFlags(VIR_DOMAIN_BLOCK_COPY_SHALLOW |
VIR_DOMAIN_BLOCK_COPY_REUSE_EXT |
VIR_DOMAIN_BLOCK_COPY_TRANSIENT_JOB, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_BLOCK_COPY_BANDWIDTH,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_COPY_GRANULARITY,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BLOCK_COPY_BUF_SIZE,
VIR_TYPED_PARAM_ULLONG,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainBlockCopyEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
/* Typed params (wisely) refused to expose unsigned long, but
* back-compat demands that we stick with a maximum of
* unsigned long bandwidth in MiB/s, while our value is
* unsigned long long in bytes/s. Hence, we have to do
* overflow detection if this is a 32-bit server handling a
* 64-bit client. */
if (STREQ(param->field, VIR_DOMAIN_BLOCK_COPY_BANDWIDTH)) {
if (sizeof(unsigned long) < sizeof(bandwidth) &&
param->value.ul > ULONG_MAX * (1ULL << 20)) {
virReportError(VIR_ERR_OVERFLOW,
_("bandwidth must be less than %llu bytes"),
ULONG_MAX * (1ULL << 20));
goto cleanup;
}
bandwidth = param->value.ul;
} else if (STREQ(param->field, VIR_DOMAIN_BLOCK_COPY_GRANULARITY)) {
if (param->value.ui != VIR_ROUND_UP_POWER_OF_TWO(param->value.ui)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("granularity must be power of 2"));
goto cleanup;
}
granularity = param->value.ui;
} else if (STREQ(param->field, VIR_DOMAIN_BLOCK_COPY_BUF_SIZE)) {
buf_size = param->value.ul;
}
}
if (!(dest = virDomainDiskDefSourceParse(destxml, vm->def, driver->xmlopt,
VIR_DOMAIN_DEF_PARSE_INACTIVE)))
goto cleanup;
ret = qemuDomainBlockCopyCommon(vm, dom->conn, disk, dest, bandwidth,
granularity, buf_size, flags, false);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainBlockPull(virDomainPtr dom, const char *path, unsigned long bandwidth,
unsigned int flags)
{
virDomainObjPtr vm;
virCheckFlags(VIR_DOMAIN_BLOCK_PULL_BANDWIDTH_BYTES, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainBlockPullEnsureACL(dom->conn, vm->def) < 0) {
virDomainObjEndAPI(&vm);
return -1;
}
return qemuDomainBlockPullCommon(dom->conn->privateData,
vm, path, NULL, bandwidth, flags);
}
static int
qemuDomainBlockCommit(virDomainPtr dom,
const char *path,
const char *base,
const char *top,
unsigned long bandwidth,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm = NULL;
char *device = NULL;
int ret = -1;
virDomainDiskDefPtr disk = NULL;
virStorageSourcePtr topSource;
unsigned int topIndex = 0;
virStorageSourcePtr baseSource = NULL;
unsigned int baseIndex = 0;
virStorageSourcePtr top_parent = NULL;
bool clean_access = false;
char *topPath = NULL;
char *basePath = NULL;
char *backingPath = NULL;
virStorageSourcePtr mirror = NULL;
unsigned long long speed = bandwidth;
/* XXX Add support for COMMIT_DELETE */
virCheckFlags(VIR_DOMAIN_BLOCK_COMMIT_SHALLOW |
VIR_DOMAIN_BLOCK_COMMIT_ACTIVE |
VIR_DOMAIN_BLOCK_COMMIT_RELATIVE |
VIR_DOMAIN_BLOCK_COMMIT_BANDWIDTH_BYTES, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainBlockCommitEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
/* Ensure that no one backports commit to RHEL 6.2, where cancel
* behaved differently */
if (!(virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCK_COMMIT) &&
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_ASYNC))) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("online commit not supported with this QEMU binary"));
goto endjob;
}
/* Convert bandwidth MiB to bytes, if necessary */
if (!(flags & VIR_DOMAIN_BLOCK_COMMIT_BANDWIDTH_BYTES)) {
if (speed > LLONG_MAX >> 20) {
virReportError(VIR_ERR_OVERFLOW,
_("bandwidth must be less than %llu"),
LLONG_MAX >> 20);
goto endjob;
}
speed <<= 20;
}
if (!(disk = qemuDomainDiskByName(vm->def, path)))
goto endjob;
if (!(device = qemuAliasFromDisk(disk)))
goto endjob;
if (!disk->src->path) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk %s has no source file to be committed"),
disk->dst);
goto endjob;
}
if (qemuDomainDiskBlockJobIsActive(disk))
goto endjob;
if (!top || STREQ(top, disk->dst))
topSource = disk->src;
else if (virStorageFileParseChainIndex(disk->dst, top, &topIndex) < 0 ||
!(topSource = virStorageFileChainLookup(disk->src, NULL,
top, topIndex,
&top_parent)))
goto endjob;
if (topSource == disk->src) {
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_ACTIVE_COMMIT)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("active commit not supported with this QEMU binary"));
goto endjob;
}
/* XXX Should we auto-pivot when COMMIT_ACTIVE is not specified? */
if (!(flags & VIR_DOMAIN_BLOCK_COMMIT_ACTIVE)) {
virReportError(VIR_ERR_INVALID_ARG,
_("commit of '%s' active layer requires active flag"),
disk->dst);
goto endjob;
}
} else if (flags & VIR_DOMAIN_BLOCK_COMMIT_ACTIVE) {
virReportError(VIR_ERR_INVALID_ARG,
_("active commit requested but '%s' is not active"),
topSource->path);
goto endjob;
}
if (!topSource->backingStore) {
virReportError(VIR_ERR_INVALID_ARG,
_("top '%s' in chain for '%s' has no backing file"),
topSource->path, path);
goto endjob;
}
if (!base && (flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW))
baseSource = topSource->backingStore;
else if (virStorageFileParseChainIndex(disk->dst, base, &baseIndex) < 0 ||
!(baseSource = virStorageFileChainLookup(disk->src, topSource,
base, baseIndex, NULL)))
goto endjob;
if ((flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW) &&
baseSource != topSource->backingStore) {
virReportError(VIR_ERR_INVALID_ARG,
_("base '%s' is not immediately below '%s' in chain "
"for '%s'"),
base, topSource->path, path);
goto endjob;
}
/* For an active commit, clone enough of the base to act as the mirror */
if (topSource == disk->src) {
if (!(mirror = virStorageSourceCopy(baseSource, false)))
goto endjob;
if (virStorageSourceInitChainElement(mirror,
disk->src,
true) < 0)
goto endjob;
}
/* For the commit to succeed, we must allow qemu to open both the
* 'base' image and the parent of 'top' as read/write; 'top' might
* not have a parent, or might already be read-write. XXX It
* would also be nice to revert 'base' to read-only, as well as
* revoke access to files removed from the chain, when the commit
* operation succeeds, but doing that requires tracking the
* operation in XML across libvirtd restarts. */
clean_access = true;
if (qemuDomainDiskChainElementPrepare(driver, vm, baseSource, false) < 0 ||
(top_parent && top_parent != disk->src &&
qemuDomainDiskChainElementPrepare(driver, vm, top_parent, false) < 0))
goto endjob;
if (flags & VIR_DOMAIN_BLOCK_COMMIT_RELATIVE &&
topSource != disk->src) {
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_CHANGE_BACKING_FILE)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("this qemu doesn't support relative blockpull"));
goto endjob;
}
if (virStorageFileGetRelativeBackingPath(topSource, baseSource,
&backingPath) < 0)
goto endjob;
if (!backingPath) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("can't keep relative backing relationship"));
goto endjob;
}
}
/* Start the commit operation. Pass the user's original spelling,
* if any, through to qemu, since qemu may behave differently
* depending on whether the input was specified as relative or
* absolute (that is, our absolute top_canon may do the wrong
* thing if the user specified a relative name). Be prepared for
* a ready event to occur while locks are dropped. */
if (mirror) {
disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_NONE;
disk->mirror = mirror;
disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT;
}
qemuDomainObjEnterMonitor(driver, vm);
basePath = qemuMonitorDiskNameLookup(priv->mon, device, disk->src,
baseSource);
topPath = qemuMonitorDiskNameLookup(priv->mon, device, disk->src,
topSource);
if (basePath && topPath)
ret = qemuMonitorBlockCommit(priv->mon, device,
topPath, basePath, backingPath,
speed);
if (qemuDomainObjExitMonitor(driver, vm) < 0) {
ret = -1;
goto endjob;
}
if (ret == 0)
QEMU_DOMAIN_DISK_PRIVATE(disk)->blockjob = true;
if (mirror) {
if (ret == 0) {
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
mirror = NULL;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
VIR_WARN("Unable to save status on vm %s after block job",
vm->def->name);
virObjectUnref(cfg);
} else {
disk->mirror = NULL;
disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_UNKNOWN;
}
}
endjob:
if (ret < 0 && clean_access) {
/* Revert access to read-only, if possible. */
qemuDomainDiskChainElementPrepare(driver, vm, baseSource, true);
if (top_parent && top_parent != disk->src)
qemuDomainDiskChainElementPrepare(driver, vm, top_parent, true);
}
virStorageSourceFree(mirror);
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(topPath);
VIR_FREE(basePath);
VIR_FREE(backingPath);
VIR_FREE(device);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainOpenGraphics(virDomainPtr dom,
unsigned int idx,
int fd,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
const char *protocol;
virCheckFlags(VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainOpenGraphicsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
if (idx >= vm->def->ngraphics) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("No graphics backend with index %d"), idx);
goto endjob;
}
switch (vm->def->graphics[idx]->type) {
case VIR_DOMAIN_GRAPHICS_TYPE_VNC:
protocol = "vnc";
break;
case VIR_DOMAIN_GRAPHICS_TYPE_SPICE:
protocol = "spice";
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Can only open VNC or SPICE graphics backends, not %s"),
virDomainGraphicsTypeToString(vm->def->graphics[idx]->type));
goto endjob;
}
if (qemuSecuritySetImageFDLabel(driver->securityManager, vm->def, fd) < 0)
goto endjob;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorOpenGraphics(priv->mon, protocol, fd, "graphicsfd",
(flags & VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH) != 0);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainOpenGraphicsFD(virDomainPtr dom,
unsigned int idx,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
const char *protocol;
int pair[2] = {-1, -1};
virCheckFlags(VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainOpenGraphicsFdEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
priv = vm->privateData;
if (idx >= vm->def->ngraphics) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("No graphics backend with index %d"), idx);
goto cleanup;
}
switch (vm->def->graphics[idx]->type) {
case VIR_DOMAIN_GRAPHICS_TYPE_VNC:
protocol = "vnc";
break;
case VIR_DOMAIN_GRAPHICS_TYPE_SPICE:
protocol = "spice";
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Can only open VNC or SPICE graphics backends, not %s"),
virDomainGraphicsTypeToString(vm->def->graphics[idx]->type));
goto cleanup;
}
if (qemuSecuritySetSocketLabel(driver->securityManager, vm->def) < 0)
goto cleanup;
if (socketpair(PF_UNIX, SOCK_STREAM, 0, pair) < 0)
goto cleanup;
if (qemuSecurityClearSocketLabel(driver->securityManager, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorOpenGraphics(priv->mon, protocol, pair[1], "graphicsfd",
(flags & VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH));
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
qemuDomainObjEndJob(driver, vm);
if (ret < 0)
goto cleanup;
ret = pair[0];
pair[0] = -1;
cleanup:
VIR_FORCE_CLOSE(pair[0]);
VIR_FORCE_CLOSE(pair[1]);
virDomainObjEndAPI(&vm);
return ret;
}
typedef enum {
QEMU_BLOCK_IOTUNE_SET_BYTES = 1 << 0,
QEMU_BLOCK_IOTUNE_SET_IOPS = 1 << 1,
QEMU_BLOCK_IOTUNE_SET_BYTES_MAX = 1 << 2,
QEMU_BLOCK_IOTUNE_SET_IOPS_MAX = 1 << 3,
QEMU_BLOCK_IOTUNE_SET_SIZE_IOPS = 1 << 4,
QEMU_BLOCK_IOTUNE_SET_GROUP_NAME = 1 << 5,
QEMU_BLOCK_IOTUNE_SET_BYTES_MAX_LENGTH = 1 << 6,
QEMU_BLOCK_IOTUNE_SET_IOPS_MAX_LENGTH = 1 << 7,
} qemuBlockIoTuneSetFlags;
/* If the user didn't specify bytes limits, inherit previous values;
* likewise if the user didn't specify iops limits. */
static int
qemuDomainSetBlockIoTuneDefaults(virDomainBlockIoTuneInfoPtr newinfo,
virDomainBlockIoTuneInfoPtr oldinfo,
qemuBlockIoTuneSetFlags set_fields)
{
#define SET_IOTUNE_DEFAULTS(BOOL, FIELD) \
if (!(set_fields & QEMU_BLOCK_IOTUNE_SET_##BOOL)) { \
newinfo->total_##FIELD = oldinfo->total_##FIELD; \
newinfo->read_##FIELD = oldinfo->read_##FIELD; \
newinfo->write_##FIELD = oldinfo->write_##FIELD; \
}
SET_IOTUNE_DEFAULTS(BYTES, bytes_sec);
SET_IOTUNE_DEFAULTS(BYTES_MAX, bytes_sec_max);
SET_IOTUNE_DEFAULTS(IOPS, iops_sec);
SET_IOTUNE_DEFAULTS(IOPS_MAX, iops_sec_max);
#undef SET_IOTUNE_DEFAULTS
if (!(set_fields & QEMU_BLOCK_IOTUNE_SET_SIZE_IOPS))
newinfo->size_iops_sec = oldinfo->size_iops_sec;
if (!(set_fields & QEMU_BLOCK_IOTUNE_SET_GROUP_NAME) &&
VIR_STRDUP(newinfo->group_name, oldinfo->group_name) < 0)
return -1;
/* The length field is handled a bit differently. If not defined/set,
* QEMU will default these to 0 or 1 depending on whether something in
* the same family is set or not.
*
* Similar to other values, if nothing in the family is defined/set,
* then take whatever is in the oldinfo.
*
* To clear an existing limit, a 0 is provided; however, passing that
* 0 onto QEMU if there's a family value defined/set (or defaulted)
* will cause an error. So, to mimic that, if our oldinfo was set and
* our newinfo is clearing, then set max_length based on whether we
* have a value in the family set/defined. */
#define SET_MAX_LENGTH(BOOL, FIELD) \
if (!(set_fields & QEMU_BLOCK_IOTUNE_SET_##BOOL)) \
newinfo->FIELD##_max_length = oldinfo->FIELD##_max_length; \
else if ((set_fields & QEMU_BLOCK_IOTUNE_SET_##BOOL) && \
oldinfo->FIELD##_max_length && \
!newinfo->FIELD##_max_length) \
newinfo->FIELD##_max_length = (newinfo->FIELD || \
newinfo->FIELD##_max) ? 1 : 0;
SET_MAX_LENGTH(BYTES_MAX_LENGTH, total_bytes_sec);
SET_MAX_LENGTH(BYTES_MAX_LENGTH, read_bytes_sec);
SET_MAX_LENGTH(BYTES_MAX_LENGTH, write_bytes_sec);
SET_MAX_LENGTH(IOPS_MAX_LENGTH, total_iops_sec);
SET_MAX_LENGTH(IOPS_MAX_LENGTH, read_iops_sec);
SET_MAX_LENGTH(IOPS_MAX_LENGTH, write_iops_sec);
#undef SET_MAX_LENGTH
return 0;
}
static int
qemuDomainSetBlockIoTune(virDomainPtr dom,
const char *path,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
virDomainBlockIoTuneInfo info;
char *device = NULL;
int ret = -1;
size_t i;
virDomainDiskDefPtr conf_disk = NULL;
virDomainDiskDefPtr disk;
qemuBlockIoTuneSetFlags set_fields = 0;
bool supportMaxOptions = true;
bool supportGroupNameOption = true;
bool supportMaxLengthOptions = true;
virQEMUDriverConfigPtr cfg = NULL;
virObjectEventPtr event = NULL;
virTypedParameterPtr eventParams = NULL;
int eventNparams = 0;
int eventMaxparams = 0;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParamsValidate(params, nparams,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_BYTES_SEC,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_READ_BYTES_SEC,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_BYTES_SEC,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_IOPS_SEC,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_READ_IOPS_SEC,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_IOPS_SEC,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_BYTES_SEC_MAX,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_READ_BYTES_SEC_MAX,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_BYTES_SEC_MAX,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_IOPS_SEC_MAX,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_READ_IOPS_SEC_MAX,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_IOPS_SEC_MAX,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_SIZE_IOPS_SEC,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_GROUP_NAME,
VIR_TYPED_PARAM_STRING,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_BYTES_SEC_MAX_LENGTH,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_READ_BYTES_SEC_MAX_LENGTH,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_BYTES_SEC_MAX_LENGTH,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_IOPS_SEC_MAX_LENGTH,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_READ_IOPS_SEC_MAX_LENGTH,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_IOPS_SEC_MAX_LENGTH,
VIR_TYPED_PARAM_ULLONG,
NULL) < 0)
return -1;
memset(&info, 0, sizeof(info));
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (virDomainSetBlockIoTuneEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
priv = vm->privateData;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (virTypedParamsAddString(&eventParams, &eventNparams, &eventMaxparams,
VIR_DOMAIN_TUNABLE_BLKDEV_DISK, path) < 0)
goto endjob;
#define SET_IOTUNE_FIELD(FIELD, BOOL, CONST) \
if (STREQ(param->field, VIR_DOMAIN_BLOCK_IOTUNE_##CONST)) { \
info.FIELD = param->value.ul; \
set_fields |= QEMU_BLOCK_IOTUNE_SET_##BOOL; \
if (virTypedParamsAddULLong(&eventParams, &eventNparams, \
&eventMaxparams, \
VIR_DOMAIN_TUNABLE_BLKDEV_##CONST, \
param->value.ul) < 0) \
goto endjob; \
continue; \
}
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (param->value.ul > QEMU_BLOCK_IOTUNE_MAX) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED,
_("block I/O throttle limit value must"
" be no more than %llu"), QEMU_BLOCK_IOTUNE_MAX);
goto endjob;
}
SET_IOTUNE_FIELD(total_bytes_sec, BYTES, TOTAL_BYTES_SEC);
SET_IOTUNE_FIELD(read_bytes_sec, BYTES, READ_BYTES_SEC);
SET_IOTUNE_FIELD(write_bytes_sec, BYTES, WRITE_BYTES_SEC);
SET_IOTUNE_FIELD(total_iops_sec, IOPS, TOTAL_IOPS_SEC);
SET_IOTUNE_FIELD(read_iops_sec, IOPS, READ_IOPS_SEC);
SET_IOTUNE_FIELD(write_iops_sec, IOPS, WRITE_IOPS_SEC);
SET_IOTUNE_FIELD(total_bytes_sec_max, BYTES_MAX,
TOTAL_BYTES_SEC_MAX);
SET_IOTUNE_FIELD(read_bytes_sec_max, BYTES_MAX,
READ_BYTES_SEC_MAX);
SET_IOTUNE_FIELD(write_bytes_sec_max, BYTES_MAX,
WRITE_BYTES_SEC_MAX);
SET_IOTUNE_FIELD(total_iops_sec_max, IOPS_MAX,
TOTAL_IOPS_SEC_MAX);
SET_IOTUNE_FIELD(read_iops_sec_max, IOPS_MAX,
READ_IOPS_SEC_MAX);
SET_IOTUNE_FIELD(write_iops_sec_max, IOPS_MAX,
WRITE_IOPS_SEC_MAX);
SET_IOTUNE_FIELD(size_iops_sec, SIZE_IOPS, SIZE_IOPS_SEC);
/* NB: Cannot use macro since this is a value.s not a value.ul */
if (STREQ(param->field, VIR_DOMAIN_BLOCK_IOTUNE_GROUP_NAME)) {
if (VIR_STRDUP(info.group_name, param->value.s) < 0)
goto endjob;
set_fields |= QEMU_BLOCK_IOTUNE_SET_GROUP_NAME;
if (virTypedParamsAddString(&eventParams, &eventNparams,
&eventMaxparams,
VIR_DOMAIN_TUNABLE_BLKDEV_GROUP_NAME,
param->value.s) < 0)
goto endjob;
continue;
}
SET_IOTUNE_FIELD(total_bytes_sec_max_length, BYTES_MAX_LENGTH,
TOTAL_BYTES_SEC_MAX_LENGTH);
SET_IOTUNE_FIELD(read_bytes_sec_max_length, BYTES_MAX_LENGTH,
READ_BYTES_SEC_MAX_LENGTH);
SET_IOTUNE_FIELD(write_bytes_sec_max_length, BYTES_MAX_LENGTH,
WRITE_BYTES_SEC_MAX_LENGTH);
SET_IOTUNE_FIELD(total_iops_sec_max_length, IOPS_MAX_LENGTH,
TOTAL_IOPS_SEC_MAX_LENGTH);
SET_IOTUNE_FIELD(read_iops_sec_max_length, IOPS_MAX_LENGTH,
READ_IOPS_SEC_MAX_LENGTH);
SET_IOTUNE_FIELD(write_iops_sec_max_length, IOPS_MAX_LENGTH,
WRITE_IOPS_SEC_MAX_LENGTH);
}
#undef SET_IOTUNE_FIELD
if ((info.total_bytes_sec && info.read_bytes_sec) ||
(info.total_bytes_sec && info.write_bytes_sec)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("total and read/write of bytes_sec "
"cannot be set at the same time"));
goto endjob;
}
if ((info.total_iops_sec && info.read_iops_sec) ||
(info.total_iops_sec && info.write_iops_sec)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("total and read/write of iops_sec "
"cannot be set at the same time"));
goto endjob;
}
if ((info.total_bytes_sec_max && info.read_bytes_sec_max) ||
(info.total_bytes_sec_max && info.write_bytes_sec_max)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("total and read/write of bytes_sec_max "
"cannot be set at the same time"));
goto endjob;
}
if ((info.total_iops_sec_max && info.read_iops_sec_max) ||
(info.total_iops_sec_max && info.write_iops_sec_max)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("total and read/write of iops_sec_max "
"cannot be set at the same time"));
goto endjob;
}
if (def) {
supportMaxOptions = virQEMUCapsGet(priv->qemuCaps,
QEMU_CAPS_DRIVE_IOTUNE_MAX);
supportGroupNameOption = virQEMUCapsGet(priv->qemuCaps,
QEMU_CAPS_DRIVE_IOTUNE_GROUP);
supportMaxLengthOptions =
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DRIVE_IOTUNE_MAX_LENGTH);
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DRIVE_IOTUNE)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("block I/O throttling not supported with this "
"QEMU binary"));
goto endjob;
}
if (!supportMaxOptions &&
(set_fields & (QEMU_BLOCK_IOTUNE_SET_BYTES_MAX |
QEMU_BLOCK_IOTUNE_SET_IOPS_MAX |
QEMU_BLOCK_IOTUNE_SET_SIZE_IOPS))) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("a block I/O throttling parameter is not "
"supported with this QEMU binary"));
goto endjob;
}
if (!supportGroupNameOption &&
(set_fields & QEMU_BLOCK_IOTUNE_SET_GROUP_NAME)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("the block I/O throttling group parameter is not "
"supported with this QEMU binary"));
goto endjob;
}
if (!supportMaxLengthOptions &&
(set_fields & (QEMU_BLOCK_IOTUNE_SET_BYTES_MAX_LENGTH |
QEMU_BLOCK_IOTUNE_SET_IOPS_MAX_LENGTH))) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("a block I/O throttling length parameter is not "
"supported with this QEMU binary"));
goto endjob;
}
if (!(disk = qemuDomainDiskByName(def, path)))
goto endjob;
if (!(device = qemuAliasFromDisk(disk)))
goto endjob;
if (qemuDomainSetBlockIoTuneDefaults(&info, &disk->blkdeviotune,
set_fields) < 0)
goto endjob;
#define CHECK_MAX(val, _bool) \
do { \
if (info.val##_max) { \
if (!info.val) { \
if (QEMU_BLOCK_IOTUNE_SET_##_bool) { \
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, \
_("cannot reset '%s' when " \
"'%s' is set"), \
#val, #val "_max"); \
} else { \
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, \
_("value '%s' cannot be set if " \
"'%s' is not set"), \
#val "_max", #val); \
} \
goto endjob; \
} \
if (info.val##_max < info.val) { \
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, \
_("value '%s' cannot be " \
"smaller than '%s'"), \
#val "_max", #val); \
goto endjob; \
} \
} \
} while (false)
CHECK_MAX(total_bytes_sec, BYTES);
CHECK_MAX(read_bytes_sec, BYTES);
CHECK_MAX(write_bytes_sec, BYTES);
CHECK_MAX(total_iops_sec, IOPS);
CHECK_MAX(read_iops_sec, IOPS);
CHECK_MAX(write_iops_sec, IOPS);
#undef CHECK_MAX
/* NB: Let's let QEMU decide how to handle issues with _length
* via the JSON error code from the block_set_io_throttle call */
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSetBlockIoThrottle(priv->mon, device,
&info, supportMaxOptions,
set_fields & QEMU_BLOCK_IOTUNE_SET_GROUP_NAME,
supportMaxLengthOptions);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
if (ret < 0)
goto endjob;
ret = -1;
if (virDomainDiskSetBlockIOTune(disk, &info) < 0)
goto endjob;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir,
vm, driver->caps) < 0)
goto endjob;
if (eventNparams) {
event = virDomainEventTunableNewFromDom(dom, eventParams, eventNparams);
eventNparams = 0;
qemuDomainEventQueue(driver, event);
}
}
if (persistentDef) {
if (!(conf_disk = virDomainDiskByName(persistentDef, path, true))) {
virReportError(VIR_ERR_INVALID_ARG,
_("missing persistent configuration for disk '%s'"),
path);
goto endjob;
}
if (qemuDomainSetBlockIoTuneDefaults(&info, &conf_disk->blkdeviotune,
set_fields) < 0)
goto endjob;
if (virDomainDiskSetBlockIOTune(conf_disk, &info) < 0)
goto endjob;
if (virDomainSaveConfig(cfg->configDir, driver->caps,
persistentDef) < 0)
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(info.group_name);
VIR_FREE(device);
virDomainObjEndAPI(&vm);
if (eventNparams)
virTypedParamsFree(eventParams, eventNparams);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetBlockIoTune(virDomainPtr dom,
const char *path,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virDomainDiskDefPtr disk;
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
virDomainBlockIoTuneInfo reply = {0};
char *device = NULL;
int ret = -1;
int maxparams;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
/* We don't return strings, and thus trivially support this flag. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
if (virDomainGetBlockIoTuneEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
/* the API check guarantees that only one of the definitions will be set */
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (def) {
/* If the VM is running, we can check if the current VM can use
* optional parameters or not. */
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DRIVE_IOTUNE)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("block I/O throttling not supported with this "
"QEMU binary"));
goto endjob;
}
maxparams = QEMU_NB_BLOCK_IO_TUNE_BASE_PARAMS;
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DRIVE_IOTUNE_MAX))
maxparams += QEMU_NB_BLOCK_IO_TUNE_MAX_PARAMS;
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DRIVE_IOTUNE_GROUP))
maxparams += QEMU_NB_BLOCK_IO_TUNE_GROUP_PARAMS;
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DRIVE_IOTUNE_MAX_LENGTH))
maxparams += QEMU_NB_BLOCK_IO_TUNE_LENGTH_PARAMS;
} else {
maxparams = QEMU_NB_BLOCK_IO_TUNE_ALL_PARAMS;
}
if (*nparams == 0) {
*nparams = maxparams;
ret = 0;
goto endjob;
} else if (*nparams < maxparams) {
maxparams = *nparams;
}
*nparams = 0;
if (def) {
if (!(disk = qemuDomainDiskByName(def, path)))
goto endjob;
if (!(device = qemuAliasFromDisk(disk)))
goto endjob;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetBlockIoThrottle(priv->mon, device, &reply);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
if (ret < 0)
goto endjob;
}
if (persistentDef) {
if (!(disk = virDomainDiskByName(persistentDef, path, true))) {
virReportError(VIR_ERR_INVALID_ARG,
_("disk '%s' was not found in the domain config"),
path);
goto endjob;
}
reply = disk->blkdeviotune;
/* Group name needs to be copied since qemuMonitorGetBlockIoThrottle
* allocates it as well */
if (VIR_STRDUP(reply.group_name, disk->blkdeviotune.group_name) < 0)
goto endjob;
}
#define BLOCK_IOTUNE_ASSIGN(name, var) \
if (*nparams < maxparams && \
virTypedParameterAssign(&params[(*nparams)++], \
VIR_DOMAIN_BLOCK_IOTUNE_ ## name, \
VIR_TYPED_PARAM_ULLONG, \
reply.var) < 0) \
goto endjob
BLOCK_IOTUNE_ASSIGN(TOTAL_BYTES_SEC, total_bytes_sec);
BLOCK_IOTUNE_ASSIGN(READ_BYTES_SEC, read_bytes_sec);
BLOCK_IOTUNE_ASSIGN(WRITE_BYTES_SEC, write_bytes_sec);
BLOCK_IOTUNE_ASSIGN(TOTAL_IOPS_SEC, total_iops_sec);
BLOCK_IOTUNE_ASSIGN(READ_IOPS_SEC, read_iops_sec);
BLOCK_IOTUNE_ASSIGN(WRITE_IOPS_SEC, write_iops_sec);
BLOCK_IOTUNE_ASSIGN(TOTAL_BYTES_SEC_MAX, total_bytes_sec_max);
BLOCK_IOTUNE_ASSIGN(READ_BYTES_SEC_MAX, read_bytes_sec_max);
BLOCK_IOTUNE_ASSIGN(WRITE_BYTES_SEC_MAX, write_bytes_sec_max);
BLOCK_IOTUNE_ASSIGN(TOTAL_IOPS_SEC_MAX, total_iops_sec_max);
BLOCK_IOTUNE_ASSIGN(READ_IOPS_SEC_MAX, read_iops_sec_max);
BLOCK_IOTUNE_ASSIGN(WRITE_IOPS_SEC_MAX, write_iops_sec_max);
BLOCK_IOTUNE_ASSIGN(SIZE_IOPS_SEC, size_iops_sec);
if (*nparams < maxparams) {
if (virTypedParameterAssign(&params[(*nparams)++],
VIR_DOMAIN_BLOCK_IOTUNE_GROUP_NAME,
VIR_TYPED_PARAM_STRING,
reply.group_name) < 0)
goto endjob;
reply.group_name = NULL;
}
BLOCK_IOTUNE_ASSIGN(TOTAL_BYTES_SEC_MAX_LENGTH, total_bytes_sec_max_length);
BLOCK_IOTUNE_ASSIGN(READ_BYTES_SEC_MAX_LENGTH, read_bytes_sec_max_length);
BLOCK_IOTUNE_ASSIGN(WRITE_BYTES_SEC_MAX_LENGTH, write_bytes_sec_max_length);
BLOCK_IOTUNE_ASSIGN(TOTAL_IOPS_SEC_MAX_LENGTH, total_iops_sec_max_length);
BLOCK_IOTUNE_ASSIGN(READ_IOPS_SEC_MAX_LENGTH, read_iops_sec_max_length);
BLOCK_IOTUNE_ASSIGN(WRITE_IOPS_SEC_MAX_LENGTH, write_iops_sec_max_length);
#undef BLOCK_IOTUNE_ASSIGN
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(reply.group_name);
VIR_FREE(device);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetDiskErrors(virDomainPtr dom,
virDomainDiskErrorPtr errors,
unsigned int nerrors,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
virHashTablePtr table = NULL;
int ret = -1;
size_t i;
int n = 0;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainGetDiskErrorsEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (!errors) {
ret = vm->def->ndisks;
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
table = qemuMonitorGetBlockInfo(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
if (!table)
goto endjob;
for (i = n = 0; i < vm->def->ndisks; i++) {
struct qemuDomainDiskInfo *info;
virDomainDiskDefPtr disk = vm->def->disks[i];
if ((info = virHashLookup(table, disk->info.alias)) &&
info->io_status != VIR_DOMAIN_DISK_ERROR_NONE) {
if (n == nerrors)
break;
if (VIR_STRDUP(errors[n].disk, disk->dst) < 0)
goto endjob;
errors[n].error = info->io_status;
n++;
}
}
ret = n;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virHashFree(table);
if (ret < 0) {
for (i = 0; i < n; i++)
VIR_FREE(errors[i].disk);
}
return ret;
}
static int
qemuDomainSetMetadata(virDomainPtr dom,
int type,
const char *metadata,
const char *key,
const char *uri,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (virDomainSetMetadataEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
ret = virDomainObjSetMetadata(vm, type, metadata, key, uri, caps,
driver->xmlopt, cfg->stateDir,
cfg->configDir, flags);
if (ret == 0) {
virObjectEventPtr ev = NULL;
ev = virDomainEventMetadataChangeNewFromObj(vm, type, uri);
qemuDomainEventQueue(driver, ev);
}
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static char *
qemuDomainGetMetadata(virDomainPtr dom,
int type,
const char *uri,
unsigned int flags)
{
virDomainObjPtr vm;
char *ret = NULL;
if (!(vm = qemuDomObjFromDomain(dom)))
return NULL;
if (virDomainGetMetadataEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
ret = virDomainObjGetMetadata(vm, type, uri, flags);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetCPUStats(virDomainPtr domain,
virTypedParameterPtr params,
unsigned int nparams,
int start_cpu,
unsigned int ncpus,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virBitmapPtr guestvcpus = NULL;
virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
priv = vm->privateData;
if (virDomainGetCPUStatsEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto cleanup;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUACCT)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPUACCT controller is not mounted"));
goto cleanup;
}
if (qemuDomainHasVcpuPids(vm) &&
!(guestvcpus = virDomainDefGetOnlineVcpumap(vm->def)))
goto cleanup;
if (start_cpu == -1)
ret = virCgroupGetDomainTotalCpuStats(priv->cgroup,
params, nparams);
else
ret = virCgroupGetPercpuStats(priv->cgroup, params, nparams,
start_cpu, ncpus, guestvcpus);
cleanup:
virBitmapFree(guestvcpus);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainPMSuspendForDuration(virDomainPtr dom,
unsigned int target,
unsigned long long duration,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm;
qemuAgentPtr agent;
int ret = -1;
virCheckFlags(0, -1);
if (duration) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Duration not supported. Use 0 for now"));
return -1;
}
if (!(target == VIR_NODE_SUSPEND_TARGET_MEM ||
target == VIR_NODE_SUSPEND_TARGET_DISK ||
target == VIR_NODE_SUSPEND_TARGET_HYBRID)) {
virReportError(VIR_ERR_INVALID_ARG,
_("Unknown suspend target: %u"),
target);
return -1;
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainPMSuspendForDurationEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_WAKEUP) &&
(target == VIR_NODE_SUSPEND_TARGET_MEM ||
target == VIR_NODE_SUSPEND_TARGET_HYBRID)) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Unable to suspend domain due to "
"missing system_wakeup monitor command"));
goto endjob;
}
if (vm->def->pm.s3 || vm->def->pm.s4) {
if (vm->def->pm.s3 == VIR_TRISTATE_BOOL_NO &&
(target == VIR_NODE_SUSPEND_TARGET_MEM ||
target == VIR_NODE_SUSPEND_TARGET_HYBRID)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("S3 state is disabled for this domain"));
goto endjob;
}
if (vm->def->pm.s4 == VIR_TRISTATE_BOOL_NO &&
target == VIR_NODE_SUSPEND_TARGET_DISK) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("S4 state is disabled for this domain"));
goto endjob;
}
}
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentSuspend(agent, target);
qemuDomainObjExitAgent(vm, agent);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainPMWakeup(virDomainPtr dom,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainPMWakeupEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_WAKEUP)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Unable to wake up domain due to "
"missing system_wakeup monitor command"));
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemWakeup(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuConnectListAllDomains(virConnectPtr conn,
virDomainPtr **domains,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
virCheckFlags(VIR_CONNECT_LIST_DOMAINS_FILTERS_ALL, -1);
if (virConnectListAllDomainsEnsureACL(conn) < 0)
goto cleanup;
ret = virDomainObjListExport(driver->domains, conn, domains,
virConnectListAllDomainsCheckACL, flags);
cleanup:
return ret;
}
static char *
qemuDomainQemuAgentCommand(virDomainPtr domain,
const char *cmd,
int timeout,
unsigned int flags)
{
virQEMUDriverPtr driver = domain->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
char *result = NULL;
qemuAgentPtr agent;
virCheckFlags(0, NULL);
if (!(vm = qemuDomObjFromDomain(domain)))
goto cleanup;
if (virDomainQemuAgentCommandEnsureACL(domain->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentArbitraryCommand(agent, cmd, &result, timeout);
qemuDomainObjExitAgent(vm, agent);
if (ret < 0)
VIR_FREE(result);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return result;
}
static int
qemuConnectDomainQemuMonitorEventRegister(virConnectPtr conn,
virDomainPtr dom,
const char *event,
virConnectDomainQemuMonitorEventCallback callback,
void *opaque,
virFreeCallback freecb,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
if (virConnectDomainQemuMonitorEventRegisterEnsureACL(conn) < 0)
goto cleanup;
if (virDomainQemuMonitorEventStateRegisterID(conn,
driver->domainEventState,
dom, event, callback,
opaque, freecb, flags,
&ret) < 0)
ret = -1;
cleanup:
return ret;
}
static int
qemuConnectDomainQemuMonitorEventDeregister(virConnectPtr conn,
int callbackID)
{
virQEMUDriverPtr driver = conn->privateData;
int ret = -1;
if (virConnectDomainQemuMonitorEventDeregisterEnsureACL(conn) < 0)
goto cleanup;
if (virObjectEventStateDeregisterID(conn, driver->domainEventState,
callbackID) < 0)
goto cleanup;
ret = 0;
cleanup:
return ret;
}
static int
qemuDomainFSTrim(virDomainPtr dom,
const char *mountPoint,
unsigned long long minimum,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuAgentPtr agent;
int ret = -1;
virCheckFlags(0, -1);
if (mountPoint) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Specifying mount point "
"is not supported for now"));
return -1;
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainFSTrimEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentFSTrim(agent, minimum);
qemuDomainObjExitAgent(vm, agent);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuNodeGetInfo(virConnectPtr conn,
virNodeInfoPtr nodeinfo)
{
if (virNodeGetInfoEnsureACL(conn) < 0)
return -1;
return virCapabilitiesGetNodeInfo(nodeinfo);
}
static int
qemuNodeGetCPUStats(virConnectPtr conn,
int cpuNum,
virNodeCPUStatsPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetCPUStatsEnsureACL(conn) < 0)
return -1;
return virHostCPUGetStats(cpuNum, params, nparams, flags);
}
static int
qemuNodeGetMemoryStats(virConnectPtr conn,
int cellNum,
virNodeMemoryStatsPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetMemoryStatsEnsureACL(conn) < 0)
return -1;
return virHostMemGetStats(cellNum, params, nparams, flags);
}
static int
qemuNodeGetCellsFreeMemory(virConnectPtr conn,
unsigned long long *freeMems,
int startCell,
int maxCells)
{
if (virNodeGetCellsFreeMemoryEnsureACL(conn) < 0)
return -1;
return virHostMemGetCellsFree(freeMems, startCell, maxCells);
}
static unsigned long long
qemuNodeGetFreeMemory(virConnectPtr conn)
{
unsigned long long freeMem;
if (virNodeGetFreeMemoryEnsureACL(conn) < 0)
return 0;
if (virHostMemGetInfo(NULL, &freeMem) < 0)
return 0;
return freeMem;
}
static int
qemuNodeGetMemoryParameters(virConnectPtr conn,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
if (virNodeGetMemoryParametersEnsureACL(conn) < 0)
return -1;
return virHostMemGetParameters(params, nparams, flags);
}
static int
qemuNodeSetMemoryParameters(virConnectPtr conn,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
if (virNodeSetMemoryParametersEnsureACL(conn) < 0)
return -1;
return virHostMemSetParameters(params, nparams, flags);
}
static int
qemuNodeGetCPUMap(virConnectPtr conn,
unsigned char **cpumap,
unsigned int *online,
unsigned int flags)
{
if (virNodeGetCPUMapEnsureACL(conn) < 0)
return -1;
return virHostCPUGetMap(cpumap, online, flags);
}
static int
qemuNodeSuspendForDuration(virConnectPtr conn,
unsigned int target,
unsigned long long duration,
unsigned int flags)
{
if (virNodeSuspendForDurationEnsureACL(conn) < 0)
return -1;
return virNodeSuspend(target, duration, flags);
}
static int
qemuConnectGetCPUModelNames(virConnectPtr conn,
const char *archName,
char ***models,
unsigned int flags)
{
virArch arch;
virCheckFlags(0, -1);
if (virConnectGetCPUModelNamesEnsureACL(conn) < 0)
return -1;
if (!(arch = virArchFromString(archName))) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot find architecture %s"),
archName);
return -1;
}
return virCPUGetModels(arch, models);
}
static int
qemuDomainGetTime(virDomainPtr dom,
long long *seconds,
unsigned int *nseconds,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuAgentPtr agent;
int ret = -1;
int rv;
virCheckFlags(0, ret);
if (!(vm = qemuDomObjFromDomain(dom)))
return ret;
if (virDomainGetTimeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
rv = qemuAgentGetTime(agent, seconds, nseconds);
qemuDomainObjExitAgent(vm, agent);
if (rv < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainSetTime(virDomainPtr dom,
long long seconds,
unsigned int nseconds,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm;
qemuAgentPtr agent;
bool rtcSync = flags & VIR_DOMAIN_TIME_SYNC;
int ret = -1;
int rv;
virCheckFlags(VIR_DOMAIN_TIME_SYNC, ret);
if (!(vm = qemuDomObjFromDomain(dom)))
return ret;
if (virDomainSetTimeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
/* On x86, the rtc-reset-reinjection QMP command must be called after
* setting the time to avoid trouble down the line. If the command is
* not available, don't set the time at all and report an error */
if (ARCH_IS_X86(vm->def->os.arch) &&
!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_RTC_RESET_REINJECTION))
{
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("cannot set time: qemu doesn't support "
"rtc-reset-reinjection command"));
goto endjob;
}
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
rv = qemuAgentSetTime(agent, seconds, nseconds, rtcSync);
qemuDomainObjExitAgent(vm, agent);
if (rv < 0)
goto endjob;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
/* Don't try to call rtc-reset-reinjection if it's not available */
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_RTC_RESET_REINJECTION)) {
qemuDomainObjEnterMonitor(driver, vm);
rv = qemuMonitorRTCResetReinjection(priv->mon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
goto endjob;
if (rv < 0)
goto endjob;
}
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainFSFreeze(virDomainPtr dom,
const char **mountpoints,
unsigned int nmountpoints,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainFSFreezeEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
ret = qemuDomainSnapshotFSFreeze(driver, vm, mountpoints, nmountpoints);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainFSThaw(virDomainPtr dom,
const char **mountpoints,
unsigned int nmountpoints,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
if (mountpoints || nmountpoints) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("specifying mountpoints is not supported"));
return ret;
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainFSThawEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
ret = qemuDomainSnapshotFSThaw(driver, vm, true);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuNodeGetFreePages(virConnectPtr conn,
unsigned int npages,
unsigned int *pages,
int startCell,
unsigned int cellCount,
unsigned long long *counts,
unsigned int flags)
{
virCheckFlags(0, -1);
if (virNodeGetFreePagesEnsureACL(conn) < 0)
return -1;
return virHostMemGetFreePages(npages, pages, startCell, cellCount, counts);
}
static char *
qemuConnectGetDomainCapabilities(virConnectPtr conn,
const char *emulatorbin,
const char *arch_str,
const char *machine,
const char *virttype_str,
unsigned int flags)
{
char *ret = NULL;
virQEMUDriverPtr driver = conn->privateData;
virQEMUCapsPtr qemuCaps = NULL;
int virttype = VIR_DOMAIN_VIRT_NONE;
virDomainVirtType capsType;
virDomainCapsPtr domCaps = NULL;
int arch = virArchFromHost(); /* virArch */
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(0, ret);
if (virConnectGetDomainCapabilitiesEnsureACL(conn) < 0)
return ret;
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virttype_str &&
(virttype = virDomainVirtTypeFromString(virttype_str)) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("unknown virttype: %s"),
virttype_str);
goto cleanup;
}
if (arch_str && (arch = virArchFromString(arch_str)) == VIR_ARCH_NONE) {
virReportError(VIR_ERR_INVALID_ARG,
_("unknown architecture: %s"),
arch_str);
goto cleanup;
}
if (emulatorbin) {
virArch arch_from_caps;
if (!(qemuCaps = virQEMUCapsCacheLookup(caps,
driver->qemuCapsCache,
emulatorbin)))
goto cleanup;
arch_from_caps = virQEMUCapsGetArch(qemuCaps);
if (arch_from_caps != arch &&
!((ARCH_IS_X86(arch) && ARCH_IS_X86(arch_from_caps)) ||
(ARCH_IS_PPC(arch) && ARCH_IS_PPC(arch_from_caps)) ||
(ARCH_IS_ARM(arch) && ARCH_IS_ARM(arch_from_caps)) ||
(ARCH_IS_S390(arch) && ARCH_IS_S390(arch_from_caps)))) {
virReportError(VIR_ERR_INVALID_ARG,
_("architecture from emulator '%s' doesn't "
"match given architecture '%s'"),
virArchToString(arch_from_caps),
virArchToString(arch));
goto cleanup;
}
} else {
if (!(qemuCaps = virQEMUCapsCacheLookupByArch(caps,
driver->qemuCapsCache,
arch)))
goto cleanup;
emulatorbin = virQEMUCapsGetBinary(qemuCaps);
}
if (machine) {
/* Turn @machine into canonical name */
machine = virQEMUCapsGetCanonicalMachine(qemuCaps, machine);
if (!virQEMUCapsIsMachineSupported(qemuCaps, machine)) {
virReportError(VIR_ERR_INVALID_ARG,
_("the machine '%s' is not supported by emulator '%s'"),
machine, emulatorbin);
goto cleanup;
}
} else {
machine = virQEMUCapsGetDefaultMachine(qemuCaps);
}
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM))
capsType = VIR_DOMAIN_VIRT_KVM;
else
capsType = VIR_DOMAIN_VIRT_QEMU;
if (virttype == VIR_DOMAIN_VIRT_NONE)
virttype = capsType;
if (virttype == VIR_DOMAIN_VIRT_KVM && capsType == VIR_DOMAIN_VIRT_QEMU) {
virReportError(VIR_ERR_INVALID_ARG,
_("KVM is not supported by '%s' on this host"),
emulatorbin);
goto cleanup;
}
if (!(domCaps = virDomainCapsNew(emulatorbin, machine, arch, virttype)))
goto cleanup;
if (virQEMUCapsFillDomainCaps(caps, domCaps, qemuCaps,
cfg->firmwares, cfg->nfirmwares) < 0)
goto cleanup;
ret = virDomainCapsFormat(domCaps);
cleanup:
virObjectUnref(cfg);
virObjectUnref(caps);
virObjectUnref(domCaps);
virObjectUnref(qemuCaps);
return ret;
}
static int
qemuDomainGetStatsState(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int privflags ATTRIBUTE_UNUSED)
{
if (virTypedParamsAddInt(&record->params,
&record->nparams,
maxparams,
"state.state",
dom->state.state) < 0)
return -1;
if (virTypedParamsAddInt(&record->params,
&record->nparams,
maxparams,
"state.reason",
dom->state.reason) < 0)
return -1;
return 0;
}
typedef enum {
QEMU_DOMAIN_STATS_HAVE_JOB = 1 << 0, /* job is entered, monitor can be
accessed */
QEMU_DOMAIN_STATS_BACKING = 1 << 1, /* include backing chain in
block stats */
} qemuDomainStatsFlags;
#define HAVE_JOB(flags) ((flags) & QEMU_DOMAIN_STATS_HAVE_JOB)
static int
qemuDomainGetStatsCpu(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int privflags ATTRIBUTE_UNUSED)
{
qemuDomainObjPrivatePtr priv = dom->privateData;
unsigned long long cpu_time = 0;
unsigned long long user_time = 0;
unsigned long long sys_time = 0;
int err = 0;
if (!priv->cgroup)
return 0;
err = virCgroupGetCpuacctUsage(priv->cgroup, &cpu_time);
if (!err && virTypedParamsAddULLong(&record->params,
&record->nparams,
maxparams,
"cpu.time",
cpu_time) < 0)
return -1;
err = virCgroupGetCpuacctStat(priv->cgroup, &user_time, &sys_time);
if (!err && virTypedParamsAddULLong(&record->params,
&record->nparams,
maxparams,
"cpu.user",
user_time) < 0)
return -1;
if (!err && virTypedParamsAddULLong(&record->params,
&record->nparams,
maxparams,
"cpu.system",
sys_time) < 0)
return -1;
return 0;
}
static int
qemuDomainGetStatsBalloon(virQEMUDriverPtr driver,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int privflags)
{
qemuDomainObjPrivatePtr priv = dom->privateData;
virDomainMemoryStatStruct stats[VIR_DOMAIN_MEMORY_STAT_NR];
int nr_stats;
unsigned long long cur_balloon = 0;
size_t i;
int err = 0;
if (!virDomainDefHasMemballoon(dom->def)) {
cur_balloon = virDomainDefGetMemoryTotal(dom->def);
} else if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BALLOON_EVENT)) {
cur_balloon = dom->def->mem.cur_balloon;
} else {
err = -1;
}
if (!err && virTypedParamsAddULLong(&record->params,
&record->nparams,
maxparams,
"balloon.current",
cur_balloon) < 0)
return -1;
if (virTypedParamsAddULLong(&record->params,
&record->nparams,
maxparams,
"balloon.maximum",
virDomainDefGetMemoryTotal(dom->def)) < 0)
return -1;
if (!HAVE_JOB(privflags) || !virDomainObjIsActive(dom))
return 0;
nr_stats = qemuDomainMemoryStatsInternal(driver, dom, stats,
VIR_DOMAIN_MEMORY_STAT_NR);
if (nr_stats < 0)
return 0;
#define STORE_MEM_RECORD(TAG, NAME) \
if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_ ##TAG) \
if (virTypedParamsAddULLong(&record->params, \
&record->nparams, \
maxparams, \
"balloon." NAME, \
stats[i].val) < 0) \
return -1;
for (i = 0; i < nr_stats; i++) {
STORE_MEM_RECORD(SWAP_IN, "swap_in")
STORE_MEM_RECORD(SWAP_OUT, "swap_out")
STORE_MEM_RECORD(MAJOR_FAULT, "major_fault")
STORE_MEM_RECORD(MINOR_FAULT, "minor_fault")
STORE_MEM_RECORD(UNUSED, "unused")
STORE_MEM_RECORD(AVAILABLE, "available")
STORE_MEM_RECORD(RSS, "rss")
STORE_MEM_RECORD(LAST_UPDATE, "last-update")
STORE_MEM_RECORD(USABLE, "usable")
}
#undef STORE_MEM_RECORD
return 0;
}
static int
qemuDomainGetStatsVcpu(virQEMUDriverPtr driver,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int privflags)
{
size_t i;
int ret = -1;
char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
virVcpuInfoPtr cpuinfo = NULL;
unsigned long long *cpuwait = NULL;
bool *cpuhalted = NULL;
if (virTypedParamsAddUInt(&record->params,
&record->nparams,
maxparams,
"vcpu.current",
virDomainDefGetVcpus(dom->def)) < 0)
return -1;
if (virTypedParamsAddUInt(&record->params,
&record->nparams,
maxparams,
"vcpu.maximum",
virDomainDefGetVcpusMax(dom->def)) < 0)
return -1;
if (VIR_ALLOC_N(cpuinfo, virDomainDefGetVcpus(dom->def)) < 0 ||
VIR_ALLOC_N(cpuwait, virDomainDefGetVcpus(dom->def)) < 0)
goto cleanup;
if (HAVE_JOB(privflags) && virDomainObjIsActive(dom)) {
if (qemuDomainRefreshVcpuHalted(driver, dom,
QEMU_ASYNC_JOB_NONE) < 0) {
/* it's ok to be silent and go ahead, because halted vcpu info
* wasn't here from the beginning */
virResetLastError();
} else if (VIR_ALLOC_N(cpuhalted, virDomainDefGetVcpus(dom->def)) < 0) {
goto cleanup;
}
}
if (qemuDomainHelperGetVcpus(dom, cpuinfo, cpuwait,
virDomainDefGetVcpus(dom->def),
NULL, 0, cpuhalted) < 0) {
virResetLastError();
ret = 0; /* it's ok to be silent and go ahead */
goto cleanup;
}
for (i = 0; i < virDomainDefGetVcpus(dom->def); i++) {
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
"vcpu.%u.state", cpuinfo[i].number);
if (virTypedParamsAddInt(&record->params,
&record->nparams,
maxparams,
param_name,
cpuinfo[i].state) < 0)
goto cleanup;
/* stats below are available only if the VM is alive */
if (!virDomainObjIsActive(dom))
continue;
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
"vcpu.%u.time", cpuinfo[i].number);
if (virTypedParamsAddULLong(&record->params,
&record->nparams,
maxparams,
param_name,
cpuinfo[i].cpuTime) < 0)
goto cleanup;
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
"vcpu.%u.wait", cpuinfo[i].number);
if (virTypedParamsAddULLong(&record->params,
&record->nparams,
maxparams,
param_name,
cpuwait[i]) < 0)
goto cleanup;
if (cpuhalted) {
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
"vcpu.%u.halted", cpuinfo[i].number);
if (virTypedParamsAddBoolean(&record->params,
&record->nparams,
maxparams,
param_name,
cpuhalted[i]) < 0)
goto cleanup;
}
}
ret = 0;
cleanup:
VIR_FREE(cpuinfo);
VIR_FREE(cpuwait);
VIR_FREE(cpuhalted);
return ret;
}
#define QEMU_ADD_COUNT_PARAM(record, maxparams, type, count) \
do { \
char param_name[VIR_TYPED_PARAM_FIELD_LENGTH]; \
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, "%s.count", type); \
if (virTypedParamsAddUInt(&(record)->params, \
&(record)->nparams, \
maxparams, \
param_name, \
count) < 0) \
goto cleanup; \
} while (0)
#define QEMU_ADD_NAME_PARAM(record, maxparams, type, subtype, num, name) \
do { \
char param_name[VIR_TYPED_PARAM_FIELD_LENGTH]; \
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, \
"%s.%zu.%s", type, num, subtype); \
if (virTypedParamsAddString(&(record)->params, \
&(record)->nparams, \
maxparams, \
param_name, \
name) < 0) \
goto cleanup; \
} while (0)
#define QEMU_ADD_NET_PARAM(record, maxparams, num, name, value) \
do { \
char param_name[VIR_TYPED_PARAM_FIELD_LENGTH]; \
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, \
"net.%zu.%s", num, name); \
if (value >= 0 && virTypedParamsAddULLong(&(record)->params, \
&(record)->nparams, \
maxparams, \
param_name, \
value) < 0) \
return -1; \
} while (0)
static int
qemuDomainGetStatsInterface(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int privflags ATTRIBUTE_UNUSED)
{
size_t i;
struct _virDomainInterfaceStats tmp;
int ret = -1;
if (!virDomainObjIsActive(dom))
return 0;
QEMU_ADD_COUNT_PARAM(record, maxparams, "net", dom->def->nnets);
/* Check the path is one of the domain's network interfaces. */
for (i = 0; i < dom->def->nnets; i++) {
if (!dom->def->nets[i]->ifname)
continue;
memset(&tmp, 0, sizeof(tmp));
QEMU_ADD_NAME_PARAM(record, maxparams,
"net", "name", i, dom->def->nets[i]->ifname);
if (dom->def->nets[i]->type == VIR_DOMAIN_NET_TYPE_VHOSTUSER) {
if (virNetDevOpenvswitchInterfaceStats(dom->def->nets[i]->ifname,
&tmp) < 0) {
virResetLastError();
continue;
}
} else {
if (virNetDevTapInterfaceStats(dom->def->nets[i]->ifname, &tmp) < 0) {
virResetLastError();
continue;
}
}
QEMU_ADD_NET_PARAM(record, maxparams, i,
"rx.bytes", tmp.rx_bytes);
QEMU_ADD_NET_PARAM(record, maxparams, i,
"rx.pkts", tmp.rx_packets);
QEMU_ADD_NET_PARAM(record, maxparams, i,
"rx.errs", tmp.rx_errs);
QEMU_ADD_NET_PARAM(record, maxparams, i,
"rx.drop", tmp.rx_drop);
QEMU_ADD_NET_PARAM(record, maxparams, i,
"tx.bytes", tmp.tx_bytes);
QEMU_ADD_NET_PARAM(record, maxparams, i,
"tx.pkts", tmp.tx_packets);
QEMU_ADD_NET_PARAM(record, maxparams, i,
"tx.errs", tmp.tx_errs);
QEMU_ADD_NET_PARAM(record, maxparams, i,
"tx.drop", tmp.tx_drop);
}
ret = 0;
cleanup:
return ret;
}
#undef QEMU_ADD_NET_PARAM
#define QEMU_ADD_BLOCK_PARAM_UI(record, maxparams, num, name, value) \
do { \
char param_name[VIR_TYPED_PARAM_FIELD_LENGTH]; \
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, \
"block.%zu.%s", num, name); \
if (virTypedParamsAddUInt(&(record)->params, \
&(record)->nparams, \
maxparams, \
param_name, \
value) < 0) \
goto cleanup; \
} while (0)
/* expects a LL, but typed parameter must be ULL */
#define QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, num, name, value) \
do { \
char param_name[VIR_TYPED_PARAM_FIELD_LENGTH]; \
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, \
"block.%zu.%s", num, name); \
if (value >= 0 && virTypedParamsAddULLong(&(record)->params, \
&(record)->nparams, \
maxparams, \
param_name, \
value) < 0) \
goto cleanup; \
} while (0)
#define QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, num, name, value) \
do { \
char param_name[VIR_TYPED_PARAM_FIELD_LENGTH]; \
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, \
"block.%zu.%s", num, name); \
if (virTypedParamsAddULLong(&(record)->params, \
&(record)->nparams, \
maxparams, \
param_name, \
value) < 0) \
goto cleanup; \
} while (0)
/* refresh information by opening images on the disk */
static int
qemuDomainGetStatsOneBlockFallback(virQEMUDriverPtr driver,
virQEMUDriverConfigPtr cfg,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
virStorageSourcePtr src,
size_t block_idx)
{
int ret = -1;
if (virStorageSourceIsEmpty(src))
return 0;
if (qemuStorageLimitsRefresh(driver, cfg, dom, src) < 0) {
virResetLastError();
return 0;
}
if (src->allocation)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"allocation", src->allocation);
if (src->capacity)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"capacity", src->capacity);
if (src->physical)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"physical", src->physical);
ret = 0;
cleanup:
return ret;
}
static int
qemuDomainGetStatsOneBlockNode(virDomainStatsRecordPtr record,
int *maxparams,
virStorageSourcePtr src,
size_t block_idx,
virHashTablePtr nodedata)
{
virJSONValuePtr data;
unsigned long long tmp;
int ret = -1;
if (src->nodebacking &&
(data = virHashLookup(nodedata, src->nodebacking))) {
if (virJSONValueObjectGetNumberUlong(data, "write_threshold", &tmp) == 0 &&
tmp > 0)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"threshold", tmp);
}
ret = 0;
cleanup:
return ret;
}
static int
qemuDomainGetStatsOneBlock(virQEMUDriverPtr driver,
virQEMUDriverConfigPtr cfg,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
virDomainDiskDefPtr disk,
virStorageSourcePtr src,
size_t block_idx,
unsigned int backing_idx,
virHashTablePtr stats,
virHashTablePtr nodedata)
{
qemuBlockStats *entry;
int ret = -1;
char *alias = NULL;
if (disk->info.alias)
alias = qemuDomainStorageAlias(disk->info.alias, backing_idx);
QEMU_ADD_NAME_PARAM(record, maxparams, "block", "name", block_idx,
disk->dst);
if (virStorageSourceIsLocalStorage(src) && src->path)
QEMU_ADD_NAME_PARAM(record, maxparams, "block", "path",
block_idx, src->path);
if (backing_idx)
QEMU_ADD_BLOCK_PARAM_UI(record, maxparams, block_idx, "backingIndex",
backing_idx);
/* the VM is offline so we have to go and load the stast from the disk by
* ourselves */
if (!virDomainObjIsActive(dom)) {
ret = qemuDomainGetStatsOneBlockFallback(driver, cfg, dom, record,
maxparams, src, block_idx);
goto cleanup;
}
/* In case where qemu didn't provide the stats we stop here rather than
* trying to refresh the stats from the disk. Inability to provide stats is
* usually caused by blocked storage so this would make libvirtd hang */
if (!stats || !alias || !(entry = virHashLookup(stats, alias))) {
ret = 0;
goto cleanup;
}
QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, block_idx,
"rd.reqs", entry->rd_req);
QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, block_idx,
"rd.bytes", entry->rd_bytes);
QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, block_idx,
"rd.times", entry->rd_total_times);
QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, block_idx,
"wr.reqs", entry->wr_req);
QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, block_idx,
"wr.bytes", entry->wr_bytes);
QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, block_idx,
"wr.times", entry->wr_total_times);
QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, block_idx,
"fl.reqs", entry->flush_req);
QEMU_ADD_BLOCK_PARAM_LL(record, maxparams, block_idx,
"fl.times", entry->flush_total_times);
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"allocation", entry->wr_highest_offset);
if (entry->capacity)
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"capacity", entry->capacity);
if (entry->physical) {
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"physical", entry->physical);
} else {
if (qemuDomainStorageUpdatePhysical(driver, cfg, dom, src) == 0) {
QEMU_ADD_BLOCK_PARAM_ULL(record, maxparams, block_idx,
"physical", src->physical);
} else {
virResetLastError();
}
}
if (qemuDomainGetStatsOneBlockNode(record, maxparams, src, block_idx,
nodedata) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(alias);
return ret;
}
static int
qemuDomainGetStatsBlock(virQEMUDriverPtr driver,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int privflags)
{
size_t i;
int ret = -1;
int rc;
virHashTablePtr stats = NULL;
virHashTablePtr nodestats = NULL;
virJSONValuePtr nodedata = NULL;
qemuDomainObjPrivatePtr priv = dom->privateData;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
bool fetchnodedata = virQEMUCapsGet(priv->qemuCaps,
QEMU_CAPS_QUERY_NAMED_BLOCK_NODES);
int count_index = -1;
size_t visited = 0;
bool visitBacking = !!(privflags & QEMU_DOMAIN_STATS_BACKING);
if (HAVE_JOB(privflags) && virDomainObjIsActive(dom)) {
qemuDomainObjEnterMonitor(driver, dom);
rc = qemuMonitorGetAllBlockStatsInfo(priv->mon, &stats,
visitBacking);
if (rc >= 0)
ignore_value(qemuMonitorBlockStatsUpdateCapacity(priv->mon, stats,
visitBacking));
if (fetchnodedata)
nodedata = qemuMonitorQueryNamedBlockNodes(priv->mon);
if (qemuDomainObjExitMonitor(driver, dom) < 0)
goto cleanup;
/* failure to retrieve stats is fine at this point */
if (rc < 0 || (fetchnodedata && !nodedata))
virResetLastError();
}
if (nodedata &&
!(nodestats = qemuBlockGetNodeData(nodedata)))
goto cleanup;
/* When listing backing chains, it's easier to fix up the count
* after the iteration than it is to iterate twice; but we still
* want count listed first. */
count_index = record->nparams;
QEMU_ADD_COUNT_PARAM(record, maxparams, "block", 0);
for (i = 0; i < dom->def->ndisks; i++) {
virDomainDiskDefPtr disk = dom->def->disks[i];
virStorageSourcePtr src = disk->src;
unsigned int backing_idx = 0;
while (src && (backing_idx == 0 || visitBacking)) {
if (qemuDomainGetStatsOneBlock(driver, cfg, dom, record, maxparams,
disk, src, visited, backing_idx,
stats, nodestats) < 0)
goto cleanup;
visited++;
backing_idx++;
src = src->backingStore;
}
}
record->params[count_index].value.ui = visited;
ret = 0;
cleanup:
virHashFree(stats);
virHashFree(nodestats);
virJSONValueFree(nodedata);
virObjectUnref(cfg);
return ret;
}
#undef QEMU_ADD_BLOCK_PARAM_LL
#undef QEMU_ADD_BLOCK_PARAM_ULL
#undef QEMU_ADD_NAME_PARAM
#undef QEMU_ADD_COUNT_PARAM
static int
qemuDomainGetStatsPerfOneEvent(virPerfPtr perf,
virPerfEventType type,
virDomainStatsRecordPtr record,
int *maxparams)
{
char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
uint64_t value = 0;
if (virPerfReadEvent(perf, type, &value) < 0)
return -1;
snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, "perf.%s",
virPerfEventTypeToString(type));
if (virTypedParamsAddULLong(&record->params,
&record->nparams,
maxparams,
param_name,
value) < 0)
return -1;
return 0;
}
static int
qemuDomainGetStatsPerf(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int privflags ATTRIBUTE_UNUSED)
{
size_t i;
qemuDomainObjPrivatePtr priv = dom->privateData;
int ret = -1;
for (i = 0; i < VIR_PERF_EVENT_LAST; i++) {
if (!virPerfEventIsEnabled(priv->perf, i))
continue;
if (qemuDomainGetStatsPerfOneEvent(priv->perf, i,
record, maxparams) < 0)
goto cleanup;
}
ret = 0;
cleanup:
return ret;
}
typedef int
(*qemuDomainGetStatsFunc)(virQEMUDriverPtr driver,
virDomainObjPtr dom,
virDomainStatsRecordPtr record,
int *maxparams,
unsigned int flags);
struct qemuDomainGetStatsWorker {
qemuDomainGetStatsFunc func;
unsigned int stats;
bool monitor;
};
static struct qemuDomainGetStatsWorker qemuDomainGetStatsWorkers[] = {
{ qemuDomainGetStatsState, VIR_DOMAIN_STATS_STATE, false },
{ qemuDomainGetStatsCpu, VIR_DOMAIN_STATS_CPU_TOTAL, false },
{ qemuDomainGetStatsBalloon, VIR_DOMAIN_STATS_BALLOON, true },
{ qemuDomainGetStatsVcpu, VIR_DOMAIN_STATS_VCPU, true },
{ qemuDomainGetStatsInterface, VIR_DOMAIN_STATS_INTERFACE, false },
{ qemuDomainGetStatsBlock, VIR_DOMAIN_STATS_BLOCK, true },
{ qemuDomainGetStatsPerf, VIR_DOMAIN_STATS_PERF, false },
{ NULL, 0, false }
};
static int
qemuDomainGetStatsCheckSupport(unsigned int *stats,
bool enforce)
{
unsigned int supportedstats = 0;
size_t i;
for (i = 0; qemuDomainGetStatsWorkers[i].func; i++)
supportedstats |= qemuDomainGetStatsWorkers[i].stats;
if (*stats == 0) {
*stats = supportedstats;
return 0;
}
if (enforce &&
*stats & ~supportedstats) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED,
_("Stats types bits 0x%x are not supported by this daemon"),
*stats & ~supportedstats);
return -1;
}
*stats &= supportedstats;
return 0;
}
static bool
qemuDomainGetStatsNeedMonitor(unsigned int stats)
{
size_t i;
for (i = 0; qemuDomainGetStatsWorkers[i].func; i++)
if (stats & qemuDomainGetStatsWorkers[i].stats &&
qemuDomainGetStatsWorkers[i].monitor)
return true;
return false;
}
static int
qemuDomainGetStats(virConnectPtr conn,
virDomainObjPtr dom,
unsigned int stats,
virDomainStatsRecordPtr *record,
unsigned int flags)
{
int maxparams = 0;
virDomainStatsRecordPtr tmp;
size_t i;
int ret = -1;
if (VIR_ALLOC(tmp) < 0)
goto cleanup;
for (i = 0; qemuDomainGetStatsWorkers[i].func; i++) {
if (stats & qemuDomainGetStatsWorkers[i].stats) {
if (qemuDomainGetStatsWorkers[i].func(conn->privateData, dom, tmp,
&maxparams, flags) < 0)
goto cleanup;
}
}
if (!(tmp->dom = virGetDomain(conn, dom->def->name,
dom->def->uuid, dom->def->id)))
goto cleanup;
*record = tmp;
tmp = NULL;
ret = 0;
cleanup:
if (tmp) {
virTypedParamsFree(tmp->params, tmp->nparams);
VIR_FREE(tmp);
}
return ret;
}
static int
qemuConnectGetAllDomainStats(virConnectPtr conn,
virDomainPtr *doms,
unsigned int ndoms,
unsigned int stats,
virDomainStatsRecordPtr **retStats,
unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
virDomainObjPtr *vms = NULL;
virDomainObjPtr vm;
size_t nvms;
virDomainStatsRecordPtr *tmpstats = NULL;
bool enforce = !!(flags & VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS);
int nstats = 0;
size_t i;
int ret = -1;
unsigned int privflags = 0;
unsigned int domflags = 0;
unsigned int lflags = flags & (VIR_CONNECT_LIST_DOMAINS_FILTERS_ACTIVE |
VIR_CONNECT_LIST_DOMAINS_FILTERS_PERSISTENT |
VIR_CONNECT_LIST_DOMAINS_FILTERS_STATE);
virCheckFlags(VIR_CONNECT_LIST_DOMAINS_FILTERS_ACTIVE |
VIR_CONNECT_LIST_DOMAINS_FILTERS_PERSISTENT |
VIR_CONNECT_LIST_DOMAINS_FILTERS_STATE |
VIR_CONNECT_GET_ALL_DOMAINS_STATS_BACKING |
VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS, -1);
if (virConnectGetAllDomainStatsEnsureACL(conn) < 0)
return -1;
if (qemuDomainGetStatsCheckSupport(&stats, enforce) < 0)
return -1;
if (ndoms) {
if (virDomainObjListConvert(driver->domains, conn, doms, ndoms, &vms,
&nvms, virConnectGetAllDomainStatsCheckACL,
lflags, true) < 0)
return -1;
} else {
if (virDomainObjListCollect(driver->domains, conn, &vms, &nvms,
virConnectGetAllDomainStatsCheckACL,
lflags) < 0)
return -1;
}
if (VIR_ALLOC_N(tmpstats, nvms + 1) < 0)
return -1;
if (qemuDomainGetStatsNeedMonitor(stats))
privflags |= QEMU_DOMAIN_STATS_HAVE_JOB;
for (i = 0; i < nvms; i++) {
virDomainStatsRecordPtr tmp = NULL;
domflags = 0;
vm = vms[i];
virObjectLock(vm);
if (HAVE_JOB(privflags) &&
qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) == 0)
domflags |= QEMU_DOMAIN_STATS_HAVE_JOB;
/* else: without a job it's still possible to gather some data */
if (flags & VIR_CONNECT_GET_ALL_DOMAINS_STATS_BACKING)
domflags |= QEMU_DOMAIN_STATS_BACKING;
if (qemuDomainGetStats(conn, vm, stats, &tmp, domflags) < 0) {
if (HAVE_JOB(domflags) && vm)
qemuDomainObjEndJob(driver, vm);
virObjectUnlock(vm);
goto cleanup;
}
if (tmp)
tmpstats[nstats++] = tmp;
if (HAVE_JOB(domflags))
qemuDomainObjEndJob(driver, vm);
virObjectUnlock(vm);
}
*retStats = tmpstats;
tmpstats = NULL;
ret = nstats;
cleanup:
virDomainStatsRecordListFree(tmpstats);
virObjectListFreeCount(vms, nvms);
return ret;
}
static int
qemuNodeAllocPages(virConnectPtr conn,
unsigned int npages,
unsigned int *pageSizes,
unsigned long long *pageCounts,
int startCell,
unsigned int cellCount,
unsigned int flags)
{
bool add = !(flags & VIR_NODE_ALLOC_PAGES_SET);
virCheckFlags(VIR_NODE_ALLOC_PAGES_SET, -1);
if (virNodeAllocPagesEnsureACL(conn) < 0)
return -1;
return virHostMemAllocPages(npages, pageSizes, pageCounts,
startCell, cellCount, add);
}
static int
qemuDomainGetFSInfo(virDomainPtr dom,
virDomainFSInfoPtr **info,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuAgentPtr agent;
virCapsPtr caps = NULL;
virDomainDefPtr def = NULL;
int ret = -1;
virCheckFlags(0, ret);
if (!(vm = qemuDomObjFromDomain(dom)))
return ret;
if (virDomainGetFSInfoEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto endjob;
if (!(def = virDomainDefCopy(vm->def, caps, driver->xmlopt, NULL, false)))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentGetFSInfo(agent, info, def);
qemuDomainObjExitAgent(vm, agent);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
virDomainDefFree(def);
virObjectUnref(caps);
return ret;
}
static int
qemuDomainInterfaceAddresses(virDomainPtr dom,
virDomainInterfacePtr **ifaces,
unsigned int source,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuAgentPtr agent;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainInterfaceAddressesEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto cleanup;
}
switch (source) {
case VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE:
ret = qemuGetDHCPInterfaces(dom, vm, ifaces);
break;
case VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT:
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentGetInterfaces(agent, ifaces);
qemuDomainObjExitAgent(vm, agent);
endjob:
qemuDomainObjEndJob(driver, vm);
break;
default:
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED,
_("Unknown IP address data source %d"),
source);
break;
}
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuGetDHCPInterfaces(virDomainPtr dom,
virDomainObjPtr vm,
virDomainInterfacePtr **ifaces)
{
int rv = -1;
int n_leases = 0;
size_t i, j;
size_t ifaces_count = 0;
virNetworkPtr network = NULL;
char macaddr[VIR_MAC_STRING_BUFLEN];
virDomainInterfacePtr iface = NULL;
virNetworkDHCPLeasePtr *leases = NULL;
virDomainInterfacePtr *ifaces_ret = NULL;
if (!dom->conn->networkDriver ||
!dom->conn->networkDriver->networkGetDHCPLeases) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Network driver does not support DHCP lease query"));
return -1;
}
for (i = 0; i < vm->def->nnets; i++) {
if (vm->def->nets[i]->type != VIR_DOMAIN_NET_TYPE_NETWORK)
continue;
virMacAddrFormat(&(vm->def->nets[i]->mac), macaddr);
virObjectUnref(network);
network = virNetworkLookupByName(dom->conn,
vm->def->nets[i]->data.network.name);
if ((n_leases = virNetworkGetDHCPLeases(network, macaddr,
&leases, 0)) < 0)
goto error;
if (n_leases) {
if (VIR_EXPAND_N(ifaces_ret, ifaces_count, 1) < 0)
goto error;
if (VIR_ALLOC(ifaces_ret[ifaces_count - 1]) < 0)
goto error;
iface = ifaces_ret[ifaces_count - 1];
/* Assuming each lease corresponds to a separate IP */
iface->naddrs = n_leases;
if (VIR_ALLOC_N(iface->addrs, iface->naddrs) < 0)
goto error;
if (VIR_STRDUP(iface->name, vm->def->nets[i]->ifname) < 0)
goto cleanup;
if (VIR_STRDUP(iface->hwaddr, macaddr) < 0)
goto cleanup;
}
for (j = 0; j < n_leases; j++) {
virNetworkDHCPLeasePtr lease = leases[j];
virDomainIPAddressPtr ip_addr = &iface->addrs[j];
if (VIR_STRDUP(ip_addr->addr, lease->ipaddr) < 0)
goto cleanup;
ip_addr->type = lease->type;
ip_addr->prefix = lease->prefix;
}
for (j = 0; j < n_leases; j++)
virNetworkDHCPLeaseFree(leases[j]);
VIR_FREE(leases);
}
*ifaces = ifaces_ret;
ifaces_ret = NULL;
rv = ifaces_count;
cleanup:
virObjectUnref(network);
if (leases) {
for (i = 0; i < n_leases; i++)
virNetworkDHCPLeaseFree(leases[i]);
}
VIR_FREE(leases);
return rv;
error:
if (ifaces_ret) {
for (i = 0; i < ifaces_count; i++)
virDomainInterfaceFree(ifaces_ret[i]);
}
VIR_FREE(ifaces_ret);
goto cleanup;
}
static int
qemuDomainSetUserPassword(virDomainPtr dom,
const char *user,
const char *password,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuAgentPtr agent;
int ret = -1;
int rv;
virCheckFlags(VIR_DOMAIN_PASSWORD_ENCRYPTED, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return ret;
if (virDomainSetUserPasswordEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
rv = qemuAgentSetUserPassword(agent, user, password,
flags & VIR_DOMAIN_PASSWORD_ENCRYPTED);
qemuDomainObjExitAgent(vm, agent);
if (rv < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainRenameCallback(virDomainObjPtr vm,
const char *new_name,
unsigned int flags,
void *opaque)
{
virQEMUDriverPtr driver = opaque;
virQEMUDriverConfigPtr cfg = NULL;
virObjectEventPtr event_new = NULL;
virObjectEventPtr event_old = NULL;
int ret = -1;
char *new_dom_name = NULL;
char *old_dom_name = NULL;
char *new_dom_cfg_file = NULL;
char *old_dom_cfg_file = NULL;
virCheckFlags(0, ret);
cfg = virQEMUDriverGetConfig(driver);
if (VIR_STRDUP(new_dom_name, new_name) < 0)
goto cleanup;
if (!(new_dom_cfg_file = virDomainConfigFile(cfg->configDir,
new_dom_name)) ||
!(old_dom_cfg_file = virDomainConfigFile(cfg->configDir,
vm->def->name)))
goto cleanup;
event_old = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_UNDEFINED,
VIR_DOMAIN_EVENT_UNDEFINED_RENAMED);
/* Switch name in domain definition. */
old_dom_name = vm->def->name;
vm->def->name = new_dom_name;
new_dom_name = NULL;
if (virDomainSaveConfig(cfg->configDir, driver->caps, vm->def) < 0)
goto rollback;
if (virFileExists(old_dom_cfg_file) &&
unlink(old_dom_cfg_file) < 0) {
virReportSystemError(errno,
_("cannot remove old domain config file %s"),
old_dom_cfg_file);
goto rollback;
}
event_new = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
VIR_DOMAIN_EVENT_DEFINED_RENAMED);
ret = 0;
cleanup:
VIR_FREE(old_dom_cfg_file);
VIR_FREE(new_dom_cfg_file);
VIR_FREE(old_dom_name);
VIR_FREE(new_dom_name);
qemuDomainEventQueue(driver, event_old);
qemuDomainEventQueue(driver, event_new);
virObjectUnref(cfg);
return ret;
rollback:
if (old_dom_name) {
new_dom_name = vm->def->name;
vm->def->name = old_dom_name;
old_dom_name = NULL;
}
if (virFileExists(new_dom_cfg_file))
unlink(new_dom_cfg_file);
goto cleanup;
}
static int qemuDomainRename(virDomainPtr dom,
const char *new_name,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
virCheckFlags(0, ret);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainRenameEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot rename active domain"));
goto endjob;
}
if (!vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot rename a transient domain"));
goto endjob;
}
if (vm->hasManagedSave) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain with a managed saved state can't be renamed"));
goto endjob;
}
if (virDomainObjGetState(vm, NULL) != VIR_DOMAIN_SHUTOFF) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain has to be shutoff before renaming"));
goto endjob;
}
if (virDomainSnapshotObjListNum(vm->snapshots, NULL, 0) > 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot rename domain with snapshots"));
goto endjob;
}
if (virDomainObjListRename(driver->domains, vm, new_name, flags,
qemuDomainRenameCallback, driver) < 0)
goto endjob;
/* Success, domain has been renamed. */
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainGetGuestVcpusParams(virTypedParameterPtr *params,
unsigned int *nparams,
qemuAgentCPUInfoPtr info,
int ninfo)
{
virTypedParameterPtr par = NULL;
int npar = 0;
int maxpar = 0;
virBitmapPtr vcpus = NULL;
virBitmapPtr online = NULL;
virBitmapPtr offlinable = NULL;
char *tmp = NULL;
size_t i;
int ret = -1;
if (!(vcpus = virBitmapNew(QEMU_GUEST_VCPU_MAX_ID)) ||
!(online = virBitmapNew(QEMU_GUEST_VCPU_MAX_ID)) ||
!(offlinable = virBitmapNew(QEMU_GUEST_VCPU_MAX_ID)))
goto cleanup;
for (i = 0; i < ninfo; i++) {
if (virBitmapSetBit(vcpus, info[i].id) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("vcpu id '%u' reported by guest agent is out of "
"range"), info[i].id);
goto cleanup;
}
if (info[i].online)
ignore_value(virBitmapSetBit(online, info[i].id));
if (info[i].offlinable)
ignore_value(virBitmapSetBit(offlinable, info[i].id));
}
#define ADD_BITMAP(name) \
if (!(tmp = virBitmapFormat(name))) \
goto cleanup; \
if (virTypedParamsAddString(&par, &npar, &maxpar, #name, tmp) < 0) \
goto cleanup; \
VIR_FREE(tmp)
ADD_BITMAP(vcpus);
ADD_BITMAP(online);
ADD_BITMAP(offlinable);
#undef ADD_BITMAP
*params = par;
*nparams = npar;
par = NULL;
ret = 0;
cleanup:
VIR_FREE(tmp);
virBitmapFree(vcpus);
virBitmapFree(online);
virBitmapFree(offlinable);
virTypedParamsFree(par, npar);
return ret;
}
static int
qemuDomainGetGuestVcpus(virDomainPtr dom,
virTypedParameterPtr *params,
unsigned int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuAgentPtr agent;
qemuAgentCPUInfoPtr info = NULL;
int ninfo = 0;
int ret = -1;
virCheckFlags(0, ret);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainGetGuestVcpusEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
ninfo = qemuAgentGetVCPUs(agent, &info);
qemuDomainObjExitAgent(vm, agent);
if (ninfo < 0)
goto endjob;
if (qemuDomainGetGuestVcpusParams(params, nparams, info, ninfo) < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(info);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainSetGuestVcpus(virDomainPtr dom,
const char *cpumap,
int state,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virBitmapPtr map = NULL;
qemuAgentCPUInfoPtr info = NULL;
qemuAgentPtr agent;
int ninfo = 0;
size_t i;
int ret = -1;
virCheckFlags(0, -1);
if (state != 0 && state != 1) {
virReportInvalidArg(state, "%s", _("unsupported state value"));
return -1;
}
if (virBitmapParse(cpumap, &map, QEMU_GUEST_VCPU_MAX_ID) < 0)
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainSetGuestVcpusEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
ninfo = qemuAgentGetVCPUs(agent, &info);
qemuDomainObjExitAgent(vm, agent);
agent = NULL;
if (ninfo < 0)
goto endjob;
for (i = 0; i < ninfo; i++) {
if (!virBitmapIsBitSet(map, info[i].id))
continue;
if (!state && !info[i].offlinable) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("vCPU '%u' is not offlinable"), info[i].id);
goto endjob;
}
info[i].online = !!state;
info[i].modified = true;
ignore_value(virBitmapClearBit(map, info[i].id));
}
if (!virBitmapIsAllClear(map)) {
char *tmp = virBitmapFormat(map);
virReportError(VIR_ERR_INVALID_ARG,
_("guest is missing vCPUs '%s'"), NULLSTR(tmp));
VIR_FREE(tmp);
goto endjob;
}
if (!qemuDomainAgentAvailable(vm, true))
goto endjob;
agent = qemuDomainObjEnterAgent(vm);
ret = qemuAgentSetVCPUs(agent, info, ninfo);
qemuDomainObjExitAgent(vm, agent);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(info);
virBitmapFree(map);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainSetVcpu(virDomainPtr dom,
const char *cpumap,
int state,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
virBitmapPtr map = NULL;
ssize_t lastvcpu;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (state != 0 && state != 1) {
virReportInvalidArg(state, "%s", _("unsupported state value"));
return -1;
}
if (virBitmapParse(cpumap, &map, QEMU_GUEST_VCPU_MAX_ID) < 0)
goto cleanup;
if ((lastvcpu = virBitmapLastSetBit(map)) < 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("no vcpus selected for modification"));
goto cleanup;
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (virDomainSetVcpuEnsureACL(dom->conn, vm->def, flags) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
goto endjob;
if (persistentDef) {
if (lastvcpu >= virDomainDefGetVcpusMax(persistentDef)) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu %zd is not present in persistent config"),
lastvcpu);
goto endjob;
}
}
if (def) {
if (lastvcpu >= virDomainDefGetVcpusMax(def)) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu %zd is not present in live config"),
lastvcpu);
goto endjob;
}
}
ret = qemuDomainSetVcpuInternal(driver, vm, def, persistentDef, map, !!state);
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
virBitmapFree(map);
virDomainObjEndAPI(&vm);
return ret;
}
static int
qemuDomainSetBlockThreshold(virDomainPtr dom,
const char *dev,
unsigned long long threshold,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm = NULL;
virStorageSourcePtr src;
char *nodename = NULL;
int rc;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainSetBlockThresholdEnsureACL(dom->conn, vm->def) < 0)
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCK_WRITE_THRESHOLD)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("this qemu does not support setting device threshold"));
goto endjob;
}
if (!(src = qemuDomainGetStorageSourceByDevstr(dev, vm->def)))
goto endjob;
if (!src->nodebacking &&
qemuBlockNodeNamesDetect(driver, vm, QEMU_ASYNC_JOB_NONE) < 0)
goto endjob;
if (!src->nodebacking) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("threshold currently can't be set for block device '%s'"),
dev);
goto endjob;
}
if (VIR_STRDUP(nodename, src->nodebacking) < 0)
goto endjob;
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorSetBlockThreshold(priv->mon, nodename, threshold);
if (qemuDomainObjExitMonitor(driver, vm) < 0 || rc < 0)
goto endjob;
ret = 0;
endjob:
qemuDomainObjEndJob(driver, vm);
cleanup:
VIR_FREE(nodename);
virDomainObjEndAPI(&vm);
return ret;
}
static virHypervisorDriver qemuHypervisorDriver = {
.name = QEMU_DRIVER_NAME,
.connectOpen = qemuConnectOpen, /* 0.2.0 */
.connectClose = qemuConnectClose, /* 0.2.0 */
.connectSupportsFeature = qemuConnectSupportsFeature, /* 0.5.0 */
.connectGetType = qemuConnectGetType, /* 0.2.0 */
.connectGetVersion = qemuConnectGetVersion, /* 0.2.0 */
.connectGetHostname = qemuConnectGetHostname, /* 0.3.3 */
.connectGetSysinfo = qemuConnectGetSysinfo, /* 0.8.8 */
.connectGetMaxVcpus = qemuConnectGetMaxVcpus, /* 0.2.1 */
.nodeGetInfo = qemuNodeGetInfo, /* 0.2.0 */
.connectGetCapabilities = qemuConnectGetCapabilities, /* 0.2.1 */
.connectListDomains = qemuConnectListDomains, /* 0.2.0 */
.connectNumOfDomains = qemuConnectNumOfDomains, /* 0.2.0 */
.connectListAllDomains = qemuConnectListAllDomains, /* 0.9.13 */
.domainCreateXML = qemuDomainCreateXML, /* 0.2.0 */
.domainLookupByID = qemuDomainLookupByID, /* 0.2.0 */
.domainLookupByUUID = qemuDomainLookupByUUID, /* 0.2.0 */
.domainLookupByName = qemuDomainLookupByName, /* 0.2.0 */
.domainSuspend = qemuDomainSuspend, /* 0.2.0 */
.domainResume = qemuDomainResume, /* 0.2.0 */
.domainShutdown = qemuDomainShutdown, /* 0.2.0 */
.domainShutdownFlags = qemuDomainShutdownFlags, /* 0.9.10 */
.domainReboot = qemuDomainReboot, /* 0.9.3 */
.domainReset = qemuDomainReset, /* 0.9.7 */
.domainDestroy = qemuDomainDestroy, /* 0.2.0 */
.domainDestroyFlags = qemuDomainDestroyFlags, /* 0.9.4 */
.domainGetOSType = qemuDomainGetOSType, /* 0.2.2 */
.domainGetMaxMemory = qemuDomainGetMaxMemory, /* 0.4.2 */
.domainSetMaxMemory = qemuDomainSetMaxMemory, /* 0.4.2 */
.domainSetMemory = qemuDomainSetMemory, /* 0.4.2 */
.domainSetMemoryFlags = qemuDomainSetMemoryFlags, /* 0.9.0 */
.domainSetMemoryParameters = qemuDomainSetMemoryParameters, /* 0.8.5 */
.domainGetMemoryParameters = qemuDomainGetMemoryParameters, /* 0.8.5 */
.domainSetMemoryStatsPeriod = qemuDomainSetMemoryStatsPeriod, /* 1.1.1 */
.domainSetBlkioParameters = qemuDomainSetBlkioParameters, /* 0.9.0 */
.domainGetBlkioParameters = qemuDomainGetBlkioParameters, /* 0.9.0 */
.domainGetInfo = qemuDomainGetInfo, /* 0.2.0 */
.domainGetState = qemuDomainGetState, /* 0.9.2 */
.domainGetControlInfo = qemuDomainGetControlInfo, /* 0.9.3 */
.domainSave = qemuDomainSave, /* 0.2.0 */
.domainSaveFlags = qemuDomainSaveFlags, /* 0.9.4 */
.domainRestore = qemuDomainRestore, /* 0.2.0 */
.domainRestoreFlags = qemuDomainRestoreFlags, /* 0.9.4 */
.domainSaveImageGetXMLDesc = qemuDomainSaveImageGetXMLDesc, /* 0.9.4 */
.domainSaveImageDefineXML = qemuDomainSaveImageDefineXML, /* 0.9.4 */
.domainCoreDump = qemuDomainCoreDump, /* 0.7.0 */
.domainCoreDumpWithFormat = qemuDomainCoreDumpWithFormat, /* 1.2.3 */
.domainScreenshot = qemuDomainScreenshot, /* 0.9.2 */
.domainSetVcpus = qemuDomainSetVcpus, /* 0.4.4 */
.domainSetVcpusFlags = qemuDomainSetVcpusFlags, /* 0.8.5 */
.domainGetVcpusFlags = qemuDomainGetVcpusFlags, /* 0.8.5 */
.domainPinVcpu = qemuDomainPinVcpu, /* 0.4.4 */
.domainPinVcpuFlags = qemuDomainPinVcpuFlags, /* 0.9.3 */
.domainGetVcpuPinInfo = qemuDomainGetVcpuPinInfo, /* 0.9.3 */
.domainPinEmulator = qemuDomainPinEmulator, /* 0.10.0 */
.domainGetEmulatorPinInfo = qemuDomainGetEmulatorPinInfo, /* 0.10.0 */
.domainGetVcpus = qemuDomainGetVcpus, /* 0.4.4 */
.domainGetMaxVcpus = qemuDomainGetMaxVcpus, /* 0.4.4 */
.domainGetIOThreadInfo = qemuDomainGetIOThreadInfo, /* 1.2.14 */
.domainPinIOThread = qemuDomainPinIOThread, /* 1.2.14 */
.domainAddIOThread = qemuDomainAddIOThread, /* 1.2.15 */
.domainDelIOThread = qemuDomainDelIOThread, /* 1.2.15 */
.domainGetSecurityLabel = qemuDomainGetSecurityLabel, /* 0.6.1 */
.domainGetSecurityLabelList = qemuDomainGetSecurityLabelList, /* 0.10.0 */
.nodeGetSecurityModel = qemuNodeGetSecurityModel, /* 0.6.1 */
.domainGetXMLDesc = qemuDomainGetXMLDesc, /* 0.2.0 */
.connectDomainXMLFromNative = qemuConnectDomainXMLFromNative, /* 0.6.4 */
.connectDomainXMLToNative = qemuConnectDomainXMLToNative, /* 0.6.4 */
.connectListDefinedDomains = qemuConnectListDefinedDomains, /* 0.2.0 */
.connectNumOfDefinedDomains = qemuConnectNumOfDefinedDomains, /* 0.2.0 */
.domainCreate = qemuDomainCreate, /* 0.2.0 */
.domainCreateWithFlags = qemuDomainCreateWithFlags, /* 0.8.2 */
.domainDefineXML = qemuDomainDefineXML, /* 0.2.0 */
.domainDefineXMLFlags = qemuDomainDefineXMLFlags, /* 1.2.12 */
.domainUndefine = qemuDomainUndefine, /* 0.2.0 */
.domainUndefineFlags = qemuDomainUndefineFlags, /* 0.9.4 */
.domainAttachDevice = qemuDomainAttachDevice, /* 0.4.1 */
.domainAttachDeviceFlags = qemuDomainAttachDeviceFlags, /* 0.7.7 */
.domainDetachDevice = qemuDomainDetachDevice, /* 0.5.0 */
.domainDetachDeviceFlags = qemuDomainDetachDeviceFlags, /* 0.7.7 */
.domainUpdateDeviceFlags = qemuDomainUpdateDeviceFlags, /* 0.8.0 */
.domainGetAutostart = qemuDomainGetAutostart, /* 0.2.1 */
.domainSetAutostart = qemuDomainSetAutostart, /* 0.2.1 */
.domainGetSchedulerType = qemuDomainGetSchedulerType, /* 0.7.0 */
.domainGetSchedulerParameters = qemuDomainGetSchedulerParameters, /* 0.7.0 */
.domainGetSchedulerParametersFlags = qemuDomainGetSchedulerParametersFlags, /* 0.9.2 */
.domainSetSchedulerParameters = qemuDomainSetSchedulerParameters, /* 0.7.0 */
.domainSetSchedulerParametersFlags = qemuDomainSetSchedulerParametersFlags, /* 0.9.2 */
.domainMigratePerform = qemuDomainMigratePerform, /* 0.5.0 */
.domainBlockResize = qemuDomainBlockResize, /* 0.9.8 */
.domainBlockStats = qemuDomainBlockStats, /* 0.4.1 */
.domainBlockStatsFlags = qemuDomainBlockStatsFlags, /* 0.9.5 */
.domainInterfaceStats = qemuDomainInterfaceStats, /* 0.4.1 */
.domainMemoryStats = qemuDomainMemoryStats, /* 0.7.5 */
.domainBlockPeek = qemuDomainBlockPeek, /* 0.4.4 */
.domainMemoryPeek = qemuDomainMemoryPeek, /* 0.4.4 */
.domainGetBlockInfo = qemuDomainGetBlockInfo, /* 0.8.1 */
.nodeGetCPUStats = qemuNodeGetCPUStats, /* 0.9.3 */
.nodeGetMemoryStats = qemuNodeGetMemoryStats, /* 0.9.3 */
.nodeGetCellsFreeMemory = qemuNodeGetCellsFreeMemory, /* 0.4.4 */
.nodeGetFreeMemory = qemuNodeGetFreeMemory, /* 0.4.4 */
.connectDomainEventRegister = qemuConnectDomainEventRegister, /* 0.5.0 */
.connectDomainEventDeregister = qemuConnectDomainEventDeregister, /* 0.5.0 */
.domainMigratePrepare2 = qemuDomainMigratePrepare2, /* 0.5.0 */
.domainMigrateFinish2 = qemuDomainMigrateFinish2, /* 0.5.0 */
.nodeDeviceDettach = qemuNodeDeviceDettach, /* 0.6.1 */
.nodeDeviceDetachFlags = qemuNodeDeviceDetachFlags, /* 1.0.5 */
.nodeDeviceReAttach = qemuNodeDeviceReAttach, /* 0.6.1 */
.nodeDeviceReset = qemuNodeDeviceReset, /* 0.6.1 */
.domainMigratePrepareTunnel = qemuDomainMigratePrepareTunnel, /* 0.7.2 */
.connectIsEncrypted = qemuConnectIsEncrypted, /* 0.7.3 */
.connectIsSecure = qemuConnectIsSecure, /* 0.7.3 */
.domainIsActive = qemuDomainIsActive, /* 0.7.3 */
.domainIsPersistent = qemuDomainIsPersistent, /* 0.7.3 */
.domainIsUpdated = qemuDomainIsUpdated, /* 0.8.6 */
.connectCompareCPU = qemuConnectCompareCPU, /* 0.7.5 */
.connectBaselineCPU = qemuConnectBaselineCPU, /* 0.7.7 */
.domainGetJobInfo = qemuDomainGetJobInfo, /* 0.7.7 */
.domainGetJobStats = qemuDomainGetJobStats, /* 1.0.3 */
.domainAbortJob = qemuDomainAbortJob, /* 0.7.7 */
.domainMigrateSetMaxDowntime = qemuDomainMigrateSetMaxDowntime, /* 0.8.0 */
.domainMigrateGetCompressionCache = qemuDomainMigrateGetCompressionCache, /* 1.0.3 */
.domainMigrateSetCompressionCache = qemuDomainMigrateSetCompressionCache, /* 1.0.3 */
.domainMigrateSetMaxSpeed = qemuDomainMigrateSetMaxSpeed, /* 0.9.0 */
.domainMigrateGetMaxSpeed = qemuDomainMigrateGetMaxSpeed, /* 0.9.5 */
.connectDomainEventRegisterAny = qemuConnectDomainEventRegisterAny, /* 0.8.0 */
.connectDomainEventDeregisterAny = qemuConnectDomainEventDeregisterAny, /* 0.8.0 */
.domainManagedSave = qemuDomainManagedSave, /* 0.8.0 */
.domainHasManagedSaveImage = qemuDomainHasManagedSaveImage, /* 0.8.0 */
.domainManagedSaveRemove = qemuDomainManagedSaveRemove, /* 0.8.0 */
.domainSnapshotCreateXML = qemuDomainSnapshotCreateXML, /* 0.8.0 */
.domainSnapshotGetXMLDesc = qemuDomainSnapshotGetXMLDesc, /* 0.8.0 */
.domainSnapshotNum = qemuDomainSnapshotNum, /* 0.8.0 */
.domainSnapshotListNames = qemuDomainSnapshotListNames, /* 0.8.0 */
.domainListAllSnapshots = qemuDomainListAllSnapshots, /* 0.9.13 */
.domainSnapshotNumChildren = qemuDomainSnapshotNumChildren, /* 0.9.7 */
.domainSnapshotListChildrenNames = qemuDomainSnapshotListChildrenNames, /* 0.9.7 */
.domainSnapshotListAllChildren = qemuDomainSnapshotListAllChildren, /* 0.9.13 */
.domainSnapshotLookupByName = qemuDomainSnapshotLookupByName, /* 0.8.0 */
.domainHasCurrentSnapshot = qemuDomainHasCurrentSnapshot, /* 0.8.0 */
.domainSnapshotGetParent = qemuDomainSnapshotGetParent, /* 0.9.7 */
.domainSnapshotCurrent = qemuDomainSnapshotCurrent, /* 0.8.0 */
.domainSnapshotIsCurrent = qemuDomainSnapshotIsCurrent, /* 0.9.13 */
.domainSnapshotHasMetadata = qemuDomainSnapshotHasMetadata, /* 0.9.13 */
.domainRevertToSnapshot = qemuDomainRevertToSnapshot, /* 0.8.0 */
.domainSnapshotDelete = qemuDomainSnapshotDelete, /* 0.8.0 */
.domainQemuMonitorCommand = qemuDomainQemuMonitorCommand, /* 0.8.3 */
.domainQemuAttach = qemuDomainQemuAttach, /* 0.9.4 */
.domainQemuAgentCommand = qemuDomainQemuAgentCommand, /* 0.10.0 */
.connectDomainQemuMonitorEventRegister = qemuConnectDomainQemuMonitorEventRegister, /* 1.2.3 */
.connectDomainQemuMonitorEventDeregister = qemuConnectDomainQemuMonitorEventDeregister, /* 1.2.3 */
.domainOpenConsole = qemuDomainOpenConsole, /* 0.8.6 */
.domainOpenGraphics = qemuDomainOpenGraphics, /* 0.9.7 */
.domainOpenGraphicsFD = qemuDomainOpenGraphicsFD, /* 1.2.8 */
.domainInjectNMI = qemuDomainInjectNMI, /* 0.9.2 */
.domainMigrateBegin3 = qemuDomainMigrateBegin3, /* 0.9.2 */
.domainMigratePrepare3 = qemuDomainMigratePrepare3, /* 0.9.2 */
.domainMigratePrepareTunnel3 = qemuDomainMigratePrepareTunnel3, /* 0.9.2 */
.domainMigratePerform3 = qemuDomainMigratePerform3, /* 0.9.2 */
.domainMigrateFinish3 = qemuDomainMigrateFinish3, /* 0.9.2 */
.domainMigrateConfirm3 = qemuDomainMigrateConfirm3, /* 0.9.2 */
.domainSendKey = qemuDomainSendKey, /* 0.9.4 */
.domainGetPerfEvents = qemuDomainGetPerfEvents, /* 1.3.3 */
.domainSetPerfEvents = qemuDomainSetPerfEvents, /* 1.3.3 */
.domainBlockJobAbort = qemuDomainBlockJobAbort, /* 0.9.4 */
.domainGetBlockJobInfo = qemuDomainGetBlockJobInfo, /* 0.9.4 */
.domainBlockJobSetSpeed = qemuDomainBlockJobSetSpeed, /* 0.9.4 */
.domainBlockPull = qemuDomainBlockPull, /* 0.9.4 */
.domainBlockRebase = qemuDomainBlockRebase, /* 0.9.10 */
.domainBlockCopy = qemuDomainBlockCopy, /* 1.2.9 */
.domainBlockCommit = qemuDomainBlockCommit, /* 1.0.0 */
.connectIsAlive = qemuConnectIsAlive, /* 0.9.8 */
.nodeSuspendForDuration = qemuNodeSuspendForDuration, /* 0.9.8 */
.domainSetBlockIoTune = qemuDomainSetBlockIoTune, /* 0.9.8 */
.domainGetBlockIoTune = qemuDomainGetBlockIoTune, /* 0.9.8 */
.domainSetNumaParameters = qemuDomainSetNumaParameters, /* 0.9.9 */
.domainGetNumaParameters = qemuDomainGetNumaParameters, /* 0.9.9 */
.domainGetInterfaceParameters = qemuDomainGetInterfaceParameters, /* 0.9.9 */
.domainSetInterfaceParameters = qemuDomainSetInterfaceParameters, /* 0.9.9 */
.domainGetDiskErrors = qemuDomainGetDiskErrors, /* 0.9.10 */
.domainSetMetadata = qemuDomainSetMetadata, /* 0.9.10 */
.domainGetMetadata = qemuDomainGetMetadata, /* 0.9.10 */
.domainPMSuspendForDuration = qemuDomainPMSuspendForDuration, /* 0.9.11 */
.domainPMWakeup = qemuDomainPMWakeup, /* 0.9.11 */
.domainGetCPUStats = qemuDomainGetCPUStats, /* 0.9.11 */
.nodeGetMemoryParameters = qemuNodeGetMemoryParameters, /* 0.10.2 */
.nodeSetMemoryParameters = qemuNodeSetMemoryParameters, /* 0.10.2 */
.nodeGetCPUMap = qemuNodeGetCPUMap, /* 1.0.0 */
.domainFSTrim = qemuDomainFSTrim, /* 1.0.1 */
.domainOpenChannel = qemuDomainOpenChannel, /* 1.0.2 */
.domainMigrateBegin3Params = qemuDomainMigrateBegin3Params, /* 1.1.0 */
.domainMigratePrepare3Params = qemuDomainMigratePrepare3Params, /* 1.1.0 */
.domainMigratePrepareTunnel3Params = qemuDomainMigratePrepareTunnel3Params, /* 1.1.0 */
.domainMigratePerform3Params = qemuDomainMigratePerform3Params, /* 1.1.0 */
.domainMigrateFinish3Params = qemuDomainMigrateFinish3Params, /* 1.1.0 */
.domainMigrateConfirm3Params = qemuDomainMigrateConfirm3Params, /* 1.1.0 */
.connectGetCPUModelNames = qemuConnectGetCPUModelNames, /* 1.1.3 */
.domainFSFreeze = qemuDomainFSFreeze, /* 1.2.5 */
.domainFSThaw = qemuDomainFSThaw, /* 1.2.5 */
.domainGetTime = qemuDomainGetTime, /* 1.2.5 */
.domainSetTime = qemuDomainSetTime, /* 1.2.5 */
.nodeGetFreePages = qemuNodeGetFreePages, /* 1.2.6 */
.connectGetDomainCapabilities = qemuConnectGetDomainCapabilities, /* 1.2.7 */
.connectGetAllDomainStats = qemuConnectGetAllDomainStats, /* 1.2.8 */
.nodeAllocPages = qemuNodeAllocPages, /* 1.2.9 */
.domainGetFSInfo = qemuDomainGetFSInfo, /* 1.2.11 */
.domainInterfaceAddresses = qemuDomainInterfaceAddresses, /* 1.2.14 */
.domainSetUserPassword = qemuDomainSetUserPassword, /* 1.2.16 */
.domainRename = qemuDomainRename, /* 1.2.19 */
.domainMigrateStartPostCopy = qemuDomainMigrateStartPostCopy, /* 1.3.3 */
.domainGetGuestVcpus = qemuDomainGetGuestVcpus, /* 2.0.0 */
.domainSetGuestVcpus = qemuDomainSetGuestVcpus, /* 2.0.0 */
.domainSetVcpu = qemuDomainSetVcpu, /* 3.1.0 */
.domainSetBlockThreshold = qemuDomainSetBlockThreshold /* 3.2.0 */
};
static virConnectDriver qemuConnectDriver = {
.hypervisorDriver = &qemuHypervisorDriver,
};
static virStateDriver qemuStateDriver = {
.name = QEMU_DRIVER_NAME,
.stateInitialize = qemuStateInitialize,
.stateAutoStart = qemuStateAutoStart,
.stateCleanup = qemuStateCleanup,
.stateReload = qemuStateReload,
.stateStop = qemuStateStop,
};
int qemuRegister(void)
{
if (virRegisterConnectDriver(&qemuConnectDriver,
true) < 0)
return -1;
if (virRegisterStateDriver(&qemuStateDriver) < 0)
return -1;
return 0;
}
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