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6c23d60961
libvirt/src/qemu/qemu_driver.c
Peter Krempa 6c23d60961 qemu: Fix damaged whitespace 
After deleting "WithDriver" from the async job function the code was
unaligned.
2013-05-31 15:35:37 +02:00

15251 lines
485 KiB
C
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/*
* qemu_driver.c: core driver methods for managing qemu guests
*
* Copyright (C) 2006-2013 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 <paths.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_conf.h"
#include "qemu_capabilities.h"
#include "qemu_command.h"
#include "qemu_cgroup.h"
#include "qemu_hostdev.h"
#include "qemu_hotplug.h"
#include "qemu_monitor.h"
#include "qemu_bridge_filter.h"
#include "qemu_process.h"
#include "qemu_migration.h"
#include "virerror.h"
#include "virlog.h"
#include "datatypes.h"
#include "virbuffer.h"
#include "nodeinfo.h"
#include "virstatslinux.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 "fdstream.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"
#define VIR_FROM_THIS VIR_FROM_QEMU
#define QEMU_DRIVER_NAME "QEMU"
#define QEMU_NB_MEM_PARAM 3
#define QEMU_NB_BLOCK_IO_TUNE_PARAM 6
#define QEMU_NB_NUMA_PARAM 2
#define QEMU_NB_TOTAL_CPU_STAT_PARAM 3
#define QEMU_NB_PER_CPU_STAT_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
#if HAVE_LINUX_KVM_H
# include <linux/kvm.h>
#endif
/* device for kvm ioctls */
#define KVM_DEVICE "/dev/kvm"
/* add definitions missing in older linux/kvm.h */
#ifndef KVMIO
# define KVMIO 0xAE
#endif
#ifndef KVM_CHECK_EXTENSION
# define KVM_CHECK_EXTENSION _IO(KVMIO, 0x03)
#endif
#ifndef KVM_CAP_NR_VCPUS
# define KVM_CAP_NR_VCPUS 9 /* returns max vcpus per vm */
#endif
#define QEMU_NB_BLKIO_PARAM 2
#define QEMU_NB_BANDWIDTH_PARAM 6
static void processWatchdogEvent(void *data, void *opaque);
static int qemuStateCleanup(void);
static int qemuDomainObjStart(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int flags);
static int qemuDomainGetMaxVcpus(virDomainPtr dom);
static int qemuDomainManagedSaveLoad(virDomainObjPtr vm,
void *opaque);
virQEMUDriverPtr qemu_driver = NULL;
static void
qemuVMDriverLock(void) {}
static void
qemuVMDriverUnlock(void) {}
static int
qemuVMFilterRebuild(virConnectPtr conn ATTRIBUTE_UNUSED,
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.
*
* Returns the domain object 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 = virDomainObjListFindByUUID(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 the caller is responsible for
* unlocking 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;
virErrorPtr err;
int flags = 0;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(data->driver);
int ret = -1;
if (cfg->autoStartBypassCache)
flags |= VIR_DOMAIN_START_BYPASS_CACHE;
virObjectLock(vm);
virResetLastError();
if (vm->autostart &&
!virDomainObjIsActive(vm)) {
if (qemuDomainObjBeginJob(data->driver, vm,
QEMU_JOB_MODIFY) < 0) {
err = virGetLastError();
VIR_ERROR(_("Failed to start job on VM '%s': %s"),
vm->def->name,
err ? err->message : _("unknown error"));
goto cleanup;
}
if (qemuDomainObjStart(data->conn, data->driver, vm, flags) < 0) {
err = virGetLastError();
VIR_ERROR(_("Failed to autostart VM '%s': %s"),
vm->def->name,
err ? err->message : _("unknown error"));
}
if (qemuDomainObjEndJob(data->driver, vm) == 0)
vm = NULL;
}
ret = 0;
cleanup:
if (vm)
virObjectUnlock(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);
if (conn)
virConnectClose(conn);
virObjectUnref(cfg);
}
static int
qemuSecurityInit(virQEMUDriverPtr driver)
{
char **names;
virSecurityManagerPtr mgr = NULL;
virSecurityManagerPtr stack = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
if (cfg->securityDriverNames &&
cfg->securityDriverNames[0]) {
names = cfg->securityDriverNames;
while (names && *names) {
if (!(mgr = virSecurityManagerNew(*names,
QEMU_DRIVER_NAME,
cfg->allowDiskFormatProbing,
cfg->securityDefaultConfined,
cfg->securityRequireConfined)))
goto error;
if (!stack) {
if (!(stack = virSecurityManagerNewStack(mgr)))
goto error;
} else {
if (virSecurityManagerStackAddNested(stack, mgr) < 0)
goto error;
}
mgr = NULL;
names++;
}
} else {
if (!(mgr = virSecurityManagerNew(NULL,
QEMU_DRIVER_NAME,
cfg->allowDiskFormatProbing,
cfg->securityDefaultConfined,
cfg->securityRequireConfined)))
goto error;
if (!(stack = virSecurityManagerNewStack(mgr)))
goto error;
mgr = NULL;
}
if (cfg->privileged) {
if (!(mgr = virSecurityManagerNewDAC(QEMU_DRIVER_NAME,
cfg->user,
cfg->group,
cfg->allowDiskFormatProbing,
cfg->securityDefaultConfined,
cfg->securityRequireConfined,
cfg->dynamicOwnership)))
goto error;
if (!stack) {
if (!(stack = virSecurityManagerNewStack(mgr)))
goto error;
} else {
if (virSecurityManagerStackAddNested(stack, mgr) < 0)
goto error;
}
mgr = NULL;
}
driver->securityManager = stack;
virObjectUnref(cfg);
return 0;
error:
VIR_ERROR(_("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;
char ebuf[1024];
unsigned int flags = (VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE |
VIR_DOMAIN_SNAPSHOT_PARSE_DISKS |
VIR_DOMAIN_SNAPSHOT_PARSE_INTERNAL);
int ret = -1;
virCapsPtr caps = NULL;
virObjectLock(vm);
if (virAsprintf(&snapDir, "%s/%s", baseDir, vm->def->name) < 0) {
VIR_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 (!(dir = opendir(snapDir))) {
if (errno != ENOENT)
VIR_ERROR(_("Failed to open snapshot directory %s for domain %s: %s"),
snapDir, vm->def->name,
virStrerror(errno, ebuf, sizeof(ebuf)));
goto cleanup;
}
while ((entry = readdir(dir))) {
if (entry->d_name[0] == '.')
continue;
/* 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) {
VIR_ERROR(_("Failed to allocate memory for path"));
continue;
}
if (virFileReadAll(fullpath, 1024*1024*1, &xmlStr) < 0) {
/* Nothing we can do here, skip this one */
VIR_ERROR(_("Failed to read snapshot file %s: %s"), fullpath,
virStrerror(errno, ebuf, sizeof(ebuf)));
VIR_FREE(fullpath);
continue;
}
def = virDomainSnapshotDefParseString(xmlStr, caps,
qemu_driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
flags);
if (def == NULL) {
/* Nothing we can do here, skip this one */
VIR_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 (vm->current_snapshot != current) {
VIR_ERROR(_("Too many snapshots claiming to be current for domain %s"),
vm->def->name);
vm->current_snapshot = NULL;
}
if (virDomainSnapshotUpdateRelations(vm->snapshots) < 0)
VIR_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:
if (dir)
closedir(dir);
VIR_FREE(snapDir);
virObjectUnref(caps);
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainNetsRestart(virDomainObjPtr vm,
void *data ATTRIBUTE_UNUSED)
{
int 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 + 1;
return 0;
}
/**
* qemuStateInitialize:
*
* Initialization function for the QEmu daemon
*/
static int
qemuStateInitialize(bool privileged,
virStateInhibitCallback callback,
void *opaque)
{
char *driverConf = NULL;
virConnectPtr conn = NULL;
char ebuf[1024];
char *membase = NULL;
char *mempath = NULL;
virQEMUDriverConfigPtr cfg;
uid_t run_uid = -1;
gid_t run_gid = -1;
if (VIR_ALLOC(qemu_driver) < 0)
return -1;
if (virMutexInit(&qemu_driver->lock) < 0) {
VIR_ERROR(_("cannot initialize mutex"));
VIR_FREE(qemu_driver);
return -1;
}
qemu_driver->inhibitCallback = callback;
qemu_driver->inhibitOpaque = opaque;
/* Don't have a dom0 so start from 1 */
qemu_driver->nextvmid = 1;
if (!(qemu_driver->domains = virDomainObjListNew()))
goto error;
/* Init domain events */
qemu_driver->domainEventState = virDomainEventStateNew();
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 out_of_memory;
if (virQEMUDriverConfigLoadFile(cfg, driverConf) < 0)
goto error;
VIR_FREE(driverConf);
if (virFileMakePath(cfg->stateDir) < 0) {
VIR_ERROR(_("Failed to create state dir '%s': %s"),
cfg->stateDir, virStrerror(errno, ebuf, sizeof(ebuf)));
goto error;
}
if (virFileMakePath(cfg->libDir) < 0) {
VIR_ERROR(_("Failed to create lib dir '%s': %s"),
cfg->libDir, virStrerror(errno, ebuf, sizeof(ebuf)));
goto error;
}
if (virFileMakePath(cfg->cacheDir) < 0) {
VIR_ERROR(_("Failed to create cache dir '%s': %s"),
cfg->cacheDir, virStrerror(errno, ebuf, sizeof(ebuf)));
goto error;
}
if (virFileMakePath(cfg->saveDir) < 0) {
VIR_ERROR(_("Failed to create save dir '%s': %s"),
cfg->saveDir, virStrerror(errno, ebuf, sizeof(ebuf)));
goto error;
}
if (virFileMakePath(cfg->snapshotDir) < 0) {
VIR_ERROR(_("Failed to create save dir '%s': %s"),
cfg->snapshotDir, virStrerror(errno, ebuf, sizeof(ebuf)));
goto error;
}
if (virFileMakePath(cfg->autoDumpPath) < 0) {
VIR_ERROR(_("Failed to create dump dir '%s': %s"),
cfg->autoDumpPath, virStrerror(errno, ebuf, sizeof(ebuf)));
goto error;
}
qemu_driver->qemuImgBinary = virFindFileInPath("kvm-img");
if (!qemu_driver->qemuImgBinary)
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 ((errno = networkDisableAllFrames(qemu_driver))) {
virReportSystemError(errno,
_("failed to add rule to drop all frames in '%s'"),
__FILE__);
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(cfg->remotePortMin,
cfg->remotePortMax)) == NULL)
goto error;
if ((qemu_driver->webSocketPorts =
virPortAllocatorNew(cfg->webSocketPortMin,
cfg->webSocketPortMax)) == NULL)
goto error;
if (qemuSecurityInit(qemu_driver) < 0)
goto error;
if ((qemu_driver->activePciHostdevs = virPCIDeviceListNew()) == NULL)
goto error;
if ((qemu_driver->activeUsbHostdevs = virUSBDeviceListNew()) == NULL)
goto error;
if ((qemu_driver->inactivePciHostdevs = virPCIDeviceListNew()) == NULL)
goto error;
if ((qemu_driver->activeScsiHostdevs = virSCSIDeviceListNew()) == NULL)
goto error;
if (!(qemu_driver->sharedDevices = virHashCreate(30, qemuSharedDeviceEntryFree)))
goto error;
if (privileged) {
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;
}
run_uid = cfg->user;
run_gid = cfg->group;
}
qemu_driver->qemuCapsCache = virQEMUCapsCacheNew(cfg->libDir,
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.
*
* NB the check for '/', since user may config "" to disable hugepages
* even when mounted
*/
if (cfg->hugetlbfsMount &&
cfg->hugetlbfsMount[0] == '/') {
if (virAsprintf(&membase, "%s/libvirt",
cfg->hugetlbfsMount) < 0 ||
virAsprintf(&mempath, "%s/qemu", membase) < 0)
goto out_of_memory;
if (virFileMakePath(mempath) < 0) {
virReportSystemError(errno,
_("unable to create hugepage path %s"), mempath);
goto error;
}
if (cfg->privileged) {
if (virFileUpdatePerm(membase, 0, S_IXGRP | S_IXOTH) < 0)
goto error;
if (chown(mempath, cfg->user, cfg->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership on %s to %d:%d"),
mempath, (int) cfg->user,
(int) cfg->group);
goto error;
}
}
VIR_FREE(membase);
cfg->hugepagePath = mempath;
}
if (!(qemu_driver->closeCallbacks = virQEMUCloseCallbacksNew()))
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,
QEMU_EXPECTED_VIRT_TYPES,
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->nextvmid);
virDomainObjListForEach(qemu_driver->domains,
qemuDomainNetsRestart,
NULL);
conn = virConnectOpen(cfg->uri);
qemuProcessReconnectAll(conn, qemu_driver);
/* Then inactive persistent configs */
if (virDomainObjListLoadAllConfigs(qemu_driver->domains,
cfg->configDir,
cfg->autostartDir, 0,
qemu_driver->caps,
qemu_driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
NULL, NULL) < 0)
goto error;
virDomainObjListForEach(qemu_driver->domains,
qemuDomainSnapshotLoad,
cfg->snapshotDir);
virDomainObjListForEach(qemu_driver->domains,
qemuDomainManagedSaveLoad,
qemu_driver);
qemu_driver->workerPool = virThreadPoolNew(0, 1, 0, processWatchdogEvent, qemu_driver);
if (!qemu_driver->workerPool)
goto error;
qemuAutostartDomains(qemu_driver);
if (conn)
virConnectClose(conn);
virNWFilterRegisterCallbackDriver(&qemuCallbackDriver);
return 0;
out_of_memory:
virReportOOMError();
error:
if (conn)
virConnectClose(conn);
VIR_FREE(driverConf);
VIR_FREE(membase);
VIR_FREE(mempath);
qemuStateCleanup();
return -1;
}
static void qemuNotifyLoadDomain(virDomainObjPtr vm, int newVM, void *opaque)
{
virQEMUDriverPtr driver = opaque;
if (newVM) {
virDomainEventPtr event =
virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
VIR_DOMAIN_EVENT_DEFINED_ADDED);
if (event)
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,
QEMU_EXPECTED_VIRT_TYPES,
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) {
virReportOOMError();
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:
for (i = 0; i < numDomains; i++)
virDomainFree(domains[i]);
VIR_FREE(domains);
VIR_FREE(flags);
if (conn)
virConnectClose(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);
virObjectUnref(qemu_driver->config);
virObjectUnref(qemu_driver->activePciHostdevs);
virObjectUnref(qemu_driver->inactivePciHostdevs);
virObjectUnref(qemu_driver->activeUsbHostdevs);
virHashFree(qemu_driver->sharedDevices);
virObjectUnref(qemu_driver->caps);
virQEMUCapsCacheFree(qemu_driver->qemuCapsCache);
virObjectUnref(qemu_driver->domains);
virObjectUnref(qemu_driver->remotePorts);
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 */
virDomainEventStateFree(qemu_driver->domainEventState);
virLockManagerPluginUnref(qemu_driver->lockManager);
virMutexDestroy(&qemu_driver->lock);
virThreadPoolFree(qemu_driver->workerPool);
VIR_FREE(qemu_driver);
return 0;
}
static virDrvOpenStatus qemuConnectOpen(virConnectPtr conn,
virConnectAuthPtr auth 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 (cfg->privileged) {
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;
}
}
}
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 */
virQEMUCloseCallbacksRun(driver->closeCallbacks, conn, driver);
conn->privateData = NULL;
return 0;
}
/* Which features are supported by this driver? */
static int
qemuConnectSupportsFeature(virConnectPtr conn ATTRIBUTE_UNUSED, int feature)
{
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:
return 1;
default:
return 0;
}
}
static const char *qemuConnectGetType(virConnectPtr conn ATTRIBUTE_UNUSED) {
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 int
kvmGetMaxVCPUs(void) {
int fd;
int ret;
if ((fd = open(KVM_DEVICE, O_RDONLY)) < 0) {
virReportSystemError(errno, _("Unable to open %s"), KVM_DEVICE);
return -1;
}
#ifdef KVM_CAP_MAX_VCPUS
/* at first try KVM_CAP_MAX_VCPUS to determine the maximum count */
if ((ret = ioctl(fd, KVM_CHECK_EXTENSION, KVM_CAP_MAX_VCPUS)) > 0)
goto cleanup;
#endif /* KVM_CAP_MAX_VCPUS */
/* as a fallback get KVM_CAP_NR_VCPUS (the recommended maximum number of
* vcpus). Note that on most machines this is set to 160. */
if ((ret = ioctl(fd, KVM_CHECK_EXTENSION, KVM_CAP_NR_VCPUS)) > 0)
goto cleanup;
/* if KVM_CAP_NR_VCPUS doesn't exist either, kernel documentation states
* that 4 should be used as the maximum number of cpus */
ret = 4;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
static char *
qemuConnectGetSysinfo(virConnectPtr conn, unsigned int flags)
{
virQEMUDriverPtr driver = conn->privateData;
virBuffer buf = VIR_BUFFER_INITIALIZER;
virCheckFlags(0, 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 (virBufferError(&buf)) {
virReportOOMError();
return NULL;
}
return virBufferContentAndReset(&buf);
}
static int qemuConnectGetMaxVcpus(virConnectPtr conn ATTRIBUTE_UNUSED, const char *type) {
if (!type)
return 16;
if (STRCASEEQ(type, "qemu"))
return 16;
if (STRCASEEQ(type, "kvm"))
return kvmGetMaxVCPUs();
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 (!(caps = virQEMUDriverGetCapabilities(driver, true)))
goto cleanup;
if ((xml = virCapabilitiesFormatXML(caps)) == NULL)
virReportOOMError();
virObjectUnref(caps);
cleanup:
return xml;
}
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, systime;
long rss;
int cpu;
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;
if (!(pidinfo = fopen(proc, "r"))) {
/* VM probably shut down, so fake 0 */
if (cpuTime)
*cpuTime = 0;
if (lastCpu)
*lastCpu = 0;
if (vm_rss)
*vm_rss = 0;
VIR_FREE(proc);
return 0;
}
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 (fscanf(pidinfo,
/* pid -> stime */
"%*d %*s %*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_FORCE_FCLOSE(pidinfo);
VIR_WARN("cannot parse process status data");
errno = -EINVAL;
return -1;
}
/* We got jiffies
* We want nanoseconds
* _SC_CLK_TCK is jiffies per second
* So calulate thus....
*/
if (cpuTime)
*cpuTime = 1000ull * 1000ull * 1000ull * (usertime + systime) / (unsigned long long)sysconf(_SC_CLK_TCK);
if (lastCpu)
*lastCpu = cpu;
/* We got pages
* We want kiloBytes
* _SC_PAGESIZE is page size in Bytes
* So calculate, but first lower the pagesize so we don't get overflow */
if (vm_rss)
*vm_rss = rss * (sysconf(_SC_PAGESIZE) >> 10);
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 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;
}
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = 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 = virDomainObjListFindByUUID(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;
}
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
cleanup:
if (vm)
virObjectUnlock(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;
}
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
cleanup:
if (vm)
virObjectUnlock(vm);
return dom;
}
static int qemuDomainIsActive(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = qemuDomObjFromDomain(dom)))
goto cleanup;
ret = virDomainObjIsActive(obj);
cleanup:
if (obj)
virObjectUnlock(obj);
return ret;
}
static int qemuDomainIsPersistent(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = qemuDomObjFromDomain(dom)))
goto cleanup;
ret = obj->persistent;
cleanup:
if (obj)
virObjectUnlock(obj);
return ret;
}
static int qemuDomainIsUpdated(virDomainPtr dom)
{
virDomainObjPtr obj;
int ret = -1;
if (!(obj = qemuDomObjFromDomain(dom)))
goto cleanup;
ret = obj->updated;
cleanup:
if (obj)
virObjectUnlock(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 (!(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 ATTRIBUTE_UNUSED)
{
return virGetHostname();
}
static int qemuConnectListDomains(virConnectPtr conn, int *ids, int nids) {
virQEMUDriverPtr driver = conn->privateData;
int n;
n = virDomainObjListGetActiveIDs(driver->domains, ids, nids);
return n;
}
static int qemuConnectNumOfDomains(virConnectPtr conn) {
virQEMUDriverPtr driver = conn->privateData;
int n;
n = virDomainObjListNumOfDomains(driver->domains, 1);
return n;
}
static int
qemuCanonicalizeMachine(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
{
const char *canon;
if (!(canon = virQEMUCapsGetCanonicalMachine(qemuCaps, def->os.machine)))
return 0;
if (STRNEQ(canon, def->os.machine)) {
char *tmp;
if (VIR_STRDUP(tmp, canon) < 0)
return -1;
VIR_FREE(def->os.machine);
def->os.machine = tmp;
}
return 0;
}
static virDomainPtr qemuDomainCreateXML(virConnectPtr conn,
const char *xml,
unsigned int flags) {
virQEMUDriverPtr driver = conn->privateData;
virDomainDefPtr def = NULL;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
virDomainEventPtr event = NULL;
virDomainEventPtr event2 = NULL;
unsigned int start_flags = VIR_QEMU_PROCESS_START_COLD;
virQEMUCapsPtr qemuCaps = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_START_PAUSED |
VIR_DOMAIN_START_AUTODESTROY, NULL);
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;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(xml, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (virSecurityManagerVerify(driver->securityManager, def) < 0)
goto cleanup;
if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, def->emulator)))
goto cleanup;
if (qemuCanonicalizeMachine(def, qemuCaps) < 0)
goto cleanup;
if (qemuDomainAssignAddresses(def, qemuCaps, NULL) < 0)
goto cleanup;
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
VIR_DOMAIN_OBJ_LIST_ADD_CHECK_LIVE,
NULL)))
goto cleanup;
def = NULL;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup; /* XXXX free the 'vm' we created ? */
if (qemuProcessStart(conn, driver, vm, NULL, -1, NULL, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE,
start_flags) < 0) {
virDomainAuditStart(vm, "booted", false);
if (qemuDomainObjEndJob(driver, vm) > 0)
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
goto cleanup;
}
event = virDomainEventNewFromObj(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 = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_PAUSED);
}
virDomainAuditStart(vm, "booted", true);
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
if (vm &&
qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
virDomainDefFree(def);
if (vm)
virObjectUnlock(vm);
if (event) {
qemuDomainEventQueue(driver, event);
if (event2)
qemuDomainEventQueue(driver, event2);
}
virObjectUnref(caps);
virObjectUnref(qemuCaps);
return dom;
}
static int qemuDomainSuspend(virDomainPtr dom) {
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virDomainEventPtr event = NULL;
qemuDomainObjPrivatePtr priv;
virDomainPausedReason reason;
int eventDetail;
int state;
virQEMUDriverConfigPtr cfg = NULL;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
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 = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
eventDetail);
}
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
goto endjob;
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
virObjectUnref(cfg);
return ret;
}
static int qemuDomainResume(virDomainPtr dom) {
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virDomainEventPtr event = NULL;
int state;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
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, NULL);
if (state == VIR_DOMAIN_PMSUSPENDED) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is pmsuspended"));
goto endjob;
} else if (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 = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
VIR_DOMAIN_EVENT_RESUMED_UNPAUSED);
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto endjob;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
goto endjob;
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
virObjectUnref(caps);
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;
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 (priv->agentError) {
if (agentRequested && !acpiRequested) {
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not "
"available due to an error"));
goto cleanup;
} else {
useAgent = false;
}
}
if (!priv->agent) {
if (agentRequested && !acpiRequested) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
goto cleanup;
} else {
useAgent = false;
}
}
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 (useAgent) {
qemuDomainObjEnterAgent(vm);
ret = qemuAgentShutdown(priv->agent, agentFlag);
qemuDomainObjExitAgent(vm);
}
/* 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))) {
qemuDomainSetFakeReboot(driver, vm, isReboot);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemPowerdown(priv->mon);
qemuDomainObjExitMonitor(driver, vm);
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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;
bool isReboot = true;
int agentFlag = QEMU_AGENT_SHUTDOWN_REBOOT;
virCheckFlags(VIR_DOMAIN_REBOOT_ACPI_POWER_BTN |
VIR_DOMAIN_REBOOT_GUEST_AGENT , -1);
/* At most one of these two flags should be set. */
if ((flags & VIR_DOMAIN_REBOOT_ACPI_POWER_BTN) &&
(flags & VIR_DOMAIN_REBOOT_GUEST_AGENT)) {
virReportInvalidArg(flags, "%s",
_("flags for acpi power button and guest agent are mutually exclusive"));
return -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;
if ((flags & VIR_DOMAIN_REBOOT_GUEST_AGENT) ||
(!(flags & VIR_DOMAIN_REBOOT_ACPI_POWER_BTN) &&
priv->agent))
useAgent = true;
if (useAgent) {
if (priv->agentError) {
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not "
"available due to an error"));
goto cleanup;
}
if (!priv->agent) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
goto cleanup;
}
} else {
#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",
_("Reboot is not supported with this QEMU binary"));
goto cleanup;
}
} else {
#endif
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Reboot is not supported without the JSON monitor"));
goto cleanup;
#if WITH_YAJL
}
#endif
}
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 (useAgent) {
qemuDomainObjEnterAgent(vm);
ret = qemuAgentShutdown(priv->agent, agentFlag);
qemuDomainObjExitAgent(vm);
} else {
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemPowerdown(priv->mon);
qemuDomainObjExitMonitor(driver, vm);
if (ret == 0)
qemuDomainSetFakeReboot(driver, vm, isReboot);
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainReset(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 (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);
qemuDomainObjExitMonitor(driver, vm);
priv->fakeReboot = false;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
/* Count how many snapshots in a set are external snapshots or checkpoints. */
static void
qemuDomainSnapshotCountExternal(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *data)
{
virDomainSnapshotObjPtr snap = payload;
int *count = data;
if (virDomainSnapshotIsExternal(snap))
(*count)++;
}
static int
qemuDomainDestroyFlags(virDomainPtr dom,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virDomainEventPtr event = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_DESTROY_GRACEFUL, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
qemuDomainSetFakeReboot(driver, vm, false);
/* We need to prevent monitor EOF callback from doing our work (and sending
* misleading events) while the vm is unlocked inside BeginJob/ProcessKill API
*/
priv->beingDestroyed = true;
/* Although qemuProcessStop does this already, there may
* be an outstanding job active. We want to make sure we
* can kill the process even if a job is active. Killing
* it now means the job will be released
*/
if (flags & VIR_DOMAIN_DESTROY_GRACEFUL) {
if (qemuProcessKill(vm, 0) < 0) {
priv->beingDestroyed = false;
goto cleanup;
}
} else {
if (qemuProcessKill(vm, VIR_QEMU_PROCESS_KILL_FORCE) < 0) {
priv->beingDestroyed = false;
goto cleanup;
}
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_DESTROY) < 0)
goto cleanup;
priv->beingDestroyed = false;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_DESTROYED, 0);
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_DESTROYED);
virDomainAuditStop(vm, "destroyed");
if (!vm->persistent) {
if (qemuDomainObjEndJob(driver, vm) > 0)
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
}
ret = 0;
endjob:
if (vm &&
qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
if (event)
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;
ignore_value(VIR_STRDUP(type, vm->def->os.type));
cleanup:
if (vm)
virObjectUnlock(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;
ret = vm->def->mem.max_balloon;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int qemuDomainSetMemoryFlags(virDomainPtr dom, unsigned long newmem,
unsigned int flags) {
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm;
virDomainDefPtr persistentDef = NULL;
int ret = -1, r;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = 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 (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto endjob;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto endjob;
if (flags & VIR_DOMAIN_MEM_MAXIMUM) {
/* resize the maximum memory */
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot resize the maximum memory on an "
"active domain"));
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Help clang 2.8 decipher the logic flow. */
sa_assert(persistentDef);
persistentDef->mem.max_balloon = newmem;
if (persistentDef->mem.cur_balloon > newmem)
persistentDef->mem.cur_balloon = newmem;
ret = virDomainSaveConfig(cfg->configDir, persistentDef);
goto endjob;
}
} else {
/* resize the current memory */
if (newmem > vm->def->mem.max_balloon) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("cannot set memory higher than max memory"));
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
r = qemuMonitorSetBalloon(priv->mon, newmem);
qemuDomainObjExitMonitor(driver, vm);
virDomainAuditMemory(vm, vm->def->mem.cur_balloon, newmem, "update",
r == 1);
if (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 (flags & VIR_DOMAIN_AFFECT_CONFIG) {
sa_assert(persistentDef);
persistentDef->mem.cur_balloon = newmem;
ret = virDomainSaveConfig(cfg->configDir, persistentDef);
goto endjob;
}
}
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
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 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 (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
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);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
if (vm)
virObjectUnlock(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) {
int 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 (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);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int qemuDomainGetInfo(virDomainPtr dom,
virDomainInfoPtr info)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
int err;
unsigned long long balloon;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
info->state = virDomainObjGetState(vm, NULL);
if (!virDomainObjIsActive(vm)) {
info->cpuTime = 0;
} else {
if (qemuGetProcessInfo(&(info->cpuTime), NULL, NULL, vm->pid, 0) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("cannot read cputime for domain"));
goto cleanup;
}
}
info->maxMem = vm->def->mem.max_balloon;
if (virDomainObjIsActive(vm)) {
qemuDomainObjPrivatePtr priv = vm->privateData;
if ((vm->def->memballoon != NULL) &&
(vm->def->memballoon->model == VIR_DOMAIN_MEMBALLOON_MODEL_NONE)) {
info->memory = vm->def->mem.max_balloon;
} else if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BALLOON_EVENT)) {
info->memory = vm->def->mem.cur_balloon;
} else if (qemuDomainJobAllowed(priv, QEMU_JOB_QUERY)) {
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm))
err = 0;
else {
qemuDomainObjEnterMonitor(driver, vm);
err = qemuMonitorGetBalloonInfo(priv->mon, &balloon);
qemuDomainObjExitMonitor(driver, vm);
}
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
if (err < 0) {
/* We couldn't get current memory allocation but that's not
* a show stopper; we wouldn't get it if there was a job
* active either
*/
info->memory = vm->def->mem.cur_balloon;
} else if (err == 0) {
/* Balloon not supported, so maxmem is always the allocation */
info->memory = vm->def->mem.max_balloon;
} else {
info->memory = balloon;
}
} else {
info->memory = vm->def->mem.cur_balloon;
}
} else {
info->memory = vm->def->mem.cur_balloon;
}
info->nrVirtCpu = vm->def->vcpus;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(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;
*state = virDomainObjGetState(vm, reason);
ret = 0;
cleanup:
if (vm)
virObjectUnlock(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 (!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;
} else if (priv->job.active) {
if (!priv->monStart) {
info->state = VIR_DOMAIN_CONTROL_JOB;
if (virTimeMillisNow(&info->stateTime) < 0)
goto cleanup;
info->stateTime -= priv->job.start;
} else {
info->state = VIR_DOMAIN_CONTROL_OCCUPIED;
if (virTimeMillisNow(&info->stateTime) < 0)
goto cleanup;
info->stateTime -= priv->monStart;
}
} else {
info->state = VIR_DOMAIN_CONTROL_OK;
}
ret = 0;
cleanup:
if (vm)
virObjectUnlock(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")
typedef struct _virQEMUSaveHeader virQEMUSaveHeader;
typedef virQEMUSaveHeader *virQEMUSaveHeaderPtr;
struct _virQEMUSaveHeader {
char magic[sizeof(QEMU_SAVE_MAGIC)-1];
uint32_t version;
uint32_t xml_len;
uint32_t was_running;
uint32_t compressed;
uint32_t unused[15];
};
static inline void
bswap_header(virQEMUSaveHeaderPtr hdr) {
hdr->version = bswap_32(hdr->version);
hdr->xml_len = bswap_32(hdr->xml_len);
hdr->was_running = bswap_32(hdr->was_running);
hdr->compressed = bswap_32(hdr->compressed);
}
/* return -errno on failure, or 0 on success */
static int
qemuDomainSaveHeader(int fd, const char *path, const char *xml,
virQEMUSaveHeaderPtr header)
{
int ret = 0;
if (safewrite(fd, header, sizeof(*header)) != sizeof(*header)) {
ret = -errno;
virReportError(VIR_ERR_OPERATION_FAILED,
_("failed to write header to domain save file '%s'"),
path);
goto endjob;
}
if (safewrite(fd, xml, header->xml_len) != header->xml_len) {
ret = -errno;
virReportError(VIR_ERR_OPERATION_FAILED,
_("failed to write xml to '%s'"), path);
goto endjob;
}
endjob:
return ret;
}
/* Given a virQEMUSaveFormat compression level, return the name
* of the program to run, or NULL if no program is needed. */
static const char *
qemuCompressProgramName(int compress)
{
return (compress == QEMU_SAVE_FORMAT_RAW ? NULL :
qemuSaveCompressionTypeToString(compress));
}
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;
}
/* Internal function to properly create or open existing files, with
* ownership affected by qemu driver setup. */
static int
qemuOpenFile(virQEMUDriverPtr driver, 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 = virStorageFileIsSharedFS(path);
uid_t uid = getuid();
gid_t gid = getgid();
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
/* 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 || cfg->dynamicOwnership)
vfoflags |= VIR_FILE_OPEN_FORCE_OWNER;
if (stat(path, &sb) == 0) {
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 it's ownership, just open it as-is */
if (is_reg && !cfg->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 (cfg->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) || cfg->user == getuid())
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;
}
/* Retry creating the file as cfg->user */
if ((fd = virFileOpenAs(path, oflags,
S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP,
cfg->user, cfg->group,
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;
virObjectUnref(cfg);
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,
const char *domXML,
int compressed,
bool was_running,
unsigned int flags,
enum qemuDomainAsyncJob asyncJob)
{
virQEMUSaveHeader header;
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;
unsigned long long pad;
unsigned long long offset;
size_t len;
char *xml = NULL;
memset(&header, 0, sizeof(header));
memcpy(header.magic, QEMU_SAVE_PARTIAL, sizeof(header.magic));
header.version = QEMU_SAVE_VERSION;
header.was_running = was_running ? 1 : 0;
header.compressed = compressed;
len = strlen(domXML) + 1;
offset = sizeof(header) + len;
/* Due to way we append QEMU state on our header with dd,
* we need to ensure there's a 512 byte boundary. Unfortunately
* we don't have an explicit offset in the header, so we fake
* it by padding the XML string with NUL bytes. Additionally,
* we want to ensure that virDomainSaveImageDefineXML can supply
* slightly larger XML, so we add a miminum padding prior to
* rounding out to page boundaries.
*/
pad = 1024;
pad += (QEMU_MONITOR_MIGRATE_TO_FILE_BS -
((offset + pad) % QEMU_MONITOR_MIGRATE_TO_FILE_BS));
if (VIR_ALLOC_N(xml, len + pad) < 0) {
virReportOOMError();
goto cleanup;
}
strcpy(xml, domXML);
offset += pad;
header.xml_len = len;
/* 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, path, O_WRONLY | O_TRUNC | O_CREAT | directFlag,
&needUnlink, &bypassSecurityDriver);
if (fd < 0)
goto cleanup;
if (!(wrapperFd = virFileWrapperFdNew(&fd, path, wrapperFlags)))
goto cleanup;
/* Write header to file, followed by XML */
if (qemuDomainSaveHeader(fd, path, xml, &header) < 0)
goto cleanup;
/* Perform the migration */
if (qemuMigrationToFile(driver, vm, fd, offset, path,
qemuCompressProgramName(compressed),
bypassSecurityDriver,
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, path, O_WRONLY, NULL, NULL)) < 0)
goto cleanup;
memcpy(header.magic, QEMU_SAVE_MAGIC, sizeof(header.magic));
if (safewrite(fd, &header, sizeof(header)) != sizeof(header)) {
virReportSystemError(errno, _("unable to write %s"), path);
goto cleanup;
}
if (VIR_CLOSE(fd) < 0) {
virReportSystemError(errno, _("unable to close %s"), path);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
virFileWrapperFdFree(wrapperFd);
VIR_FREE(xml);
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 *xmlin, unsigned int flags)
{
char *xml = NULL;
bool was_running = false;
int ret = -1;
int rc;
virDomainEventPtr event = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
virCapsPtr caps;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!qemuMigrationIsAllowed(driver, vm, vm->def, false))
goto cleanup;
if (qemuDomainObjBeginAsyncJob(driver, vm,
QEMU_ASYNC_JOB_SAVE) < 0)
memset(&priv->job.info, 0, sizeof(priv->job.info));
priv->job.info.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.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,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE))) {
goto endjob;
}
if (!virDomainDefCheckABIStability(vm->def, def)) {
virDomainDefFree(def);
goto endjob;
}
xml = qemuDomainDefFormatLive(driver, def, true, true);
} else {
xml = qemuDomainDefFormatLive(driver, vm->def, true, true);
}
if (!xml) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to get domain xml"));
goto endjob;
}
ret = qemuDomainSaveMemory(driver, vm, path, xml, compressed,
was_running, flags, QEMU_ASYNC_JOB_SAVE);
if (ret < 0)
goto endjob;
/* Shut it down */
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_SAVED, 0);
virDomainAuditStop(vm, "saved");
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_SAVED);
if (!vm->persistent) {
if (qemuDomainObjEndAsyncJob(driver, vm) > 0)
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
}
endjob:
if (vm) {
if (ret != 0) {
if (was_running && virDomainObjIsActive(vm)) {
rc = qemuProcessStartCPUs(driver, vm, dom->conn,
VIR_DOMAIN_RUNNING_SAVE_CANCELED,
QEMU_ASYNC_JOB_SAVE);
if (rc < 0) {
VIR_WARN("Unable to resume guest CPUs after save failure");
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR);
}
}
}
if (qemuDomainObjEndAsyncJob(driver, vm) == 0)
vm = NULL;
}
cleanup:
VIR_FREE(xml);
if (event)
qemuDomainEventQueue(driver, event);
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
return ret;
}
/* Returns true if a compression program is available in PATH */
static bool qemuCompressProgramAvailable(virQEMUSaveFormat compress)
{
const char *prog;
char *c;
if (compress == QEMU_SAVE_FORMAT_RAW)
return true;
prog = qemuSaveCompressionTypeToString(compress);
c = virFindFileInPath(prog);
if (!c)
return false;
VIR_FREE(c);
return true;
}
static int
qemuDomainSaveFlags(virDomainPtr dom, const char *path, const char *dxml,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int compressed;
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 (cfg->saveImageFormat == NULL)
compressed = QEMU_SAVE_FORMAT_RAW;
else {
compressed = qemuSaveCompressionTypeFromString(cfg->saveImageFormat);
if (compressed < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Invalid save image format specified "
"in configuration file"));
goto cleanup;
}
if (!qemuCompressProgramAvailable(compressed)) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Compression program for image format "
"in configuration file isn't available"));
goto cleanup;
}
}
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
ret = qemuDomainSaveInternal(driver, dom, vm, path, compressed,
dxml, flags);
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
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) {
virReportOOMError();
virObjectUnref(cfg);
return NULL;
}
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainManagedSave(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
char *name = NULL;
int ret = -1;
int compressed;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
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;
}
if (!(name = qemuDomainManagedSavePath(driver, vm)))
goto cleanup;
VIR_INFO("Saving state to %s", name);
compressed = QEMU_SAVE_FORMAT_RAW;
if ((ret = qemuDomainSaveInternal(driver, dom, vm, name, compressed,
NULL, flags)) == 0)
vm->hasManagedSave = true;
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
VIR_FREE(name);
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;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
ret = vm->hasManagedSave;
virObjectUnlock(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 (!(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);
virObjectUnlock(vm);
return ret;
}
static int qemuDumpToFd(virQEMUDriverPtr driver, virDomainObjPtr vm,
int fd, enum qemuDomainAsyncJob asyncJob)
{
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 (virSecurityManagerSetImageFDLabel(driver->securityManager, vm->def,
fd) < 0)
return -1;
priv->job.dump_memory_only = true;
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
return -1;
ret = qemuMonitorDumpToFd(priv->mon, fd);
qemuDomainObjExitMonitor(driver, vm);
return ret;
}
static int
doCoreDump(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *path,
virQEMUSaveFormat compress,
unsigned int dump_flags)
{
int fd = -1;
int ret = -1;
virFileWrapperFdPtr wrapperFd = NULL;
int directFlag = 0;
unsigned int flags = VIR_FILE_WRAPPER_NON_BLOCKING;
/* 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, 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) {
ret = qemuDumpToFd(driver, vm, fd, QEMU_ASYNC_JOB_DUMP);
} else {
ret = qemuMigrationToFile(driver, vm, fd, 0, path,
qemuCompressProgramName(compress), false,
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);
return ret;
}
static virQEMUSaveFormat
getCompressionType(virQEMUDriverPtr driver)
{
int ret = QEMU_SAVE_FORMAT_RAW;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
/*
* We reuse "save" flag for "dump" here. Then, we can support the same
* format in "save" and "dump".
*/
if (cfg->dumpImageFormat) {
ret = qemuSaveCompressionTypeFromString(cfg->dumpImageFormat);
/* Use "raw" as the format if the specified format is not valid,
* or the compress program is not available.
*/
if (ret < 0) {
VIR_WARN("%s", _("Invalid dump image format specified in "
"configuration file, using raw"));
ret = QEMU_SAVE_FORMAT_RAW;
goto cleanup;
}
if (!qemuCompressProgramAvailable(ret)) {
VIR_WARN("%s", _("Compression program for dump image format "
"in configuration file isn't available, "
"using raw"));
ret = QEMU_SAVE_FORMAT_RAW;
goto cleanup;
}
}
cleanup:
virObjectUnref(cfg);
return ret;
}
static int qemuDomainCoreDump(virDomainPtr dom,
const char *path,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int resume = 0, paused = 0;
int ret = -1;
virDomainEventPtr 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 (qemuDomainObjBeginAsyncJob(driver, vm,
QEMU_ASYNC_JOB_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 = 1;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
}
ret = doCoreDump(driver, vm, path, getCompressionType(driver), flags);
if (ret < 0)
goto endjob;
paused = 1;
endjob:
if ((ret == 0) && (flags & VIR_DUMP_CRASH)) {
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_CRASHED, 0);
virDomainAuditStop(vm, "crashed");
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_CRASHED);
}
/* Since the monitor is always attached to a pty for libvirt, it
will support synchronous operations so we always get here after
the migration is complete. */
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);
qemuDomainObjExitMonitor(driver, vm);
}
if (resume && qemuProcessStartCPUs(driver, vm, dom->conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_DUMP) < 0) {
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR);
if (virGetLastError() == NULL)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("resuming after dump failed"));
}
}
if (qemuDomainObjEndAsyncJob(driver, vm) == 0)
vm = NULL;
else if ((ret == 0) && (flags & VIR_DUMP_CRASH) && !vm->persistent) {
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
}
cleanup:
if (vm)
virObjectUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
return ret;
}
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 (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) {
virReportOOMError();
goto endjob;
}
if ((tmp_fd = mkostemp(tmp, O_CLOEXEC)) == -1) {
virReportSystemError(errno, _("mkostemp(\"%s\") failed"), tmp);
goto endjob;
}
unlink_tmp = true;
virSecurityManagerSetSavedStateLabel(qemu_driver->securityManager, vm->def, tmp);
qemuDomainObjEnterMonitor(driver, vm);
if (qemuMonitorScreendump(priv->mon, tmp) < 0) {
qemuDomainObjExitMonitor(driver, vm);
goto endjob;
}
qemuDomainObjExitMonitor(driver, vm);
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);
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(cfg);
return ret;
}
static void processWatchdogEvent(void *data, void *opaque)
{
int ret;
struct qemuDomainWatchdogEvent *wdEvent = data;
virQEMUDriverPtr driver = opaque;
virQEMUDriverConfigPtr cfg;
virObjectLock(wdEvent->vm);
cfg = virQEMUDriverGetConfig(driver);
switch (wdEvent->action) {
case VIR_DOMAIN_WATCHDOG_ACTION_DUMP:
{
char *dumpfile;
unsigned int flags = 0;
if (virAsprintf(&dumpfile, "%s/%s-%u",
cfg->autoDumpPath,
wdEvent->vm->def->name,
(unsigned int)time(NULL)) < 0) {
virReportOOMError();
goto unlock;
}
if (qemuDomainObjBeginAsyncJob(driver, wdEvent->vm,
QEMU_ASYNC_JOB_DUMP) < 0) {
VIR_FREE(dumpfile);
goto unlock;
}
if (!virDomainObjIsActive(wdEvent->vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
VIR_FREE(dumpfile);
goto endjob;
}
flags |= cfg->autoDumpBypassCache ? VIR_DUMP_BYPASS_CACHE: 0;
ret = doCoreDump(driver, wdEvent->vm, dumpfile,
getCompressionType(driver), flags);
if (ret < 0)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Dump failed"));
ret = qemuProcessStartCPUs(driver, wdEvent->vm, NULL,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_DUMP);
if (ret < 0)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Resuming after dump failed"));
VIR_FREE(dumpfile);
}
break;
default:
goto unlock;
}
endjob:
/* Safe to ignore value since ref count was incremented in
* qemuProcessHandleWatchdog().
*/
ignore_value(qemuDomainObjEndAsyncJob(driver, wdEvent->vm));
unlock:
virObjectUnlock(wdEvent->vm);
virObjectUnref(wdEvent->vm);
VIR_FREE(wdEvent);
virObjectUnref(cfg);
}
static int qemuDomainHotplugVcpus(virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int nvcpus)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
int i, rc = 1;
int ret = -1;
int oldvcpus = vm->def->vcpus;
int vcpus = oldvcpus;
pid_t *cpupids = NULL;
int ncpupids;
virCgroupPtr cgroup_vcpu = NULL;
qemuDomainObjEnterMonitor(driver, vm);
/* We need different branches here, because we want to offline
* in reverse order to onlining, so any partial fail leaves us in a
* reasonably sensible state */
if (nvcpus > vcpus) {
for (i = vcpus; i < nvcpus; i++) {
/* Online new CPU */
rc = qemuMonitorSetCPU(priv->mon, i, 1);
if (rc == 0)
goto unsupported;
if (rc < 0)
goto cleanup;
vcpus++;
}
} else {
for (i = vcpus - 1; i >= nvcpus; i--) {
/* Offline old CPU */
rc = qemuMonitorSetCPU(priv->mon, i, 0);
if (rc == 0)
goto unsupported;
if (rc < 0)
goto cleanup;
vcpus--;
}
}
/* hotplug succeeded */
ret = 0;
/* After hotplugging the CPUs we need to re-detect threads corresponding
* to the virtual CPUs. Some older versions don't provide the thread ID
* or don't have the "info cpus" command (and they don't support multiple
* CPUs anyways), so errors in the re-detection will not be treated
* fatal */
if ((ncpupids = qemuMonitorGetCPUInfo(priv->mon, &cpupids)) <= 0) {
virResetLastError();
goto cleanup;
}
/* check if hotplug has failed */
if (vcpus < oldvcpus && ncpupids == oldvcpus) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("qemu didn't unplug the vCPUs properly"));
vcpus = oldvcpus;
ret = -1;
goto cleanup;
}
if (ncpupids != vcpus) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("got wrong number of vCPU pids from QEMU monitor. "
"got %d, wanted %d"),
ncpupids, vcpus);
ret = -1;
goto cleanup;
}
if (nvcpus > oldvcpus) {
for (i = oldvcpus; i < nvcpus; i++) {
if (priv->cgroup) {
int rv = -1;
/* Create cgroup for the onlined vcpu */
rv = virCgroupNewVcpu(priv->cgroup, i, true, &cgroup_vcpu);
if (rv < 0) {
virReportSystemError(-rv,
_("Unable to create vcpu cgroup for %s(vcpu:"
" %d)"),
vm->def->name, i);
goto cleanup;
}
/* Add vcpu thread to the cgroup */
rv = virCgroupAddTask(cgroup_vcpu, cpupids[i]);
if (rv < 0) {
virReportSystemError(-rv,
_("unable to add vcpu %d task %d to cgroup"),
i, cpupids[i]);
virCgroupRemove(cgroup_vcpu);
goto cleanup;
}
}
/* Inherit def->cpuset */
if (vm->def->cpumask) {
/* vm->def->cputune.vcpupin can't be NULL if
* vm->def->cpumask is not NULL.
*/
virDomainVcpuPinDefPtr vcpupin = NULL;
if (VIR_REALLOC_N(vm->def->cputune.vcpupin,
vm->def->cputune.nvcpupin + 1) < 0) {
virReportOOMError();
goto cleanup;
}
if (VIR_ALLOC(vcpupin) < 0) {
virReportOOMError();
goto cleanup;
}
vcpupin->cpumask = virBitmapNew(VIR_DOMAIN_CPUMASK_LEN);
virBitmapCopy(vcpupin->cpumask, vm->def->cpumask);
vcpupin->vcpuid = i;
vm->def->cputune.vcpupin[vm->def->cputune.nvcpupin++] = vcpupin;
if (cgroup_vcpu) {
if (qemuSetupCgroupVcpuPin(cgroup_vcpu,
vm->def->cputune.vcpupin,
vm->def->cputune.nvcpupin, i) < 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("failed to set cpuset.cpus in cgroup"
" for vcpu %d"), i);
ret = -1;
goto cleanup;
}
} else {
if (virProcessSetAffinity(cpupids[i],
vcpupin->cpumask) < 0) {
virReportError(VIR_ERR_SYSTEM_ERROR,
_("failed to set cpu affinity for vcpu %d"),
i);
ret = -1;
goto cleanup;
}
}
}
virCgroupFree(&cgroup_vcpu);
}
} else {
for (i = oldvcpus - 1; i >= nvcpus; i--) {
virDomainVcpuPinDefPtr vcpupin = NULL;
if (priv->cgroup) {
int rv = -1;
rv = virCgroupNewVcpu(priv->cgroup, i, false, &cgroup_vcpu);
if (rv < 0) {
virReportSystemError(-rv,
_("Unable to access vcpu cgroup for %s(vcpu:"
" %d)"),
vm->def->name, i);
goto cleanup;
}
/* Remove cgroup for the offlined vcpu */
virCgroupRemove(cgroup_vcpu);
virCgroupFree(&cgroup_vcpu);
}
/* Free vcpupin setting */
if ((vcpupin = virDomainLookupVcpuPin(vm->def, i))) {
VIR_FREE(vcpupin);
}
}
}
priv->nvcpupids = ncpupids;
VIR_FREE(priv->vcpupids);
priv->vcpupids = cpupids;
cpupids = NULL;
cleanup:
qemuDomainObjExitMonitor(driver, vm);
vm->def->vcpus = vcpus;
VIR_FREE(cpupids);
virDomainAuditVcpu(vm, oldvcpus, nvcpus, "update", rc == 1);
if (cgroup_vcpu)
virCgroupFree(&cgroup_vcpu);
return ret;
unsupported:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("cannot change vcpu count of this domain"));
goto cleanup;
}
static int
qemuDomainSetVcpusFlags(virDomainPtr dom, unsigned int nvcpus,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef;
int ret = -1;
bool maximum;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_VCPU_MAXIMUM, -1);
if (!nvcpus || (unsigned short) nvcpus != nvcpus) {
virReportError(VIR_ERR_INVALID_ARG,
_("argument out of range: %d"), nvcpus);
return -1;
}
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
maximum = (flags & VIR_DOMAIN_VCPU_MAXIMUM) != 0;
flags &= ~VIR_DOMAIN_VCPU_MAXIMUM;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto endjob;
/* MAXIMUM cannot be mixed with LIVE. */
if (maximum && (flags & VIR_DOMAIN_AFFECT_LIVE)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("cannot adjust maximum on running domain"));
goto endjob;
}
if (!maximum && nvcpus > vm->def->maxvcpus) {
virReportError(VIR_ERR_INVALID_ARG,
_("requested vcpus is greater than max allowable"
" vcpus for the domain: %d > %d"),
nvcpus, vm->def->maxvcpus);
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (qemuDomainHotplugVcpus(driver, vm, nvcpus) < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (maximum) {
persistentDef->maxvcpus = nvcpus;
if (nvcpus < persistentDef->vcpus)
persistentDef->vcpus = nvcpus;
} else {
persistentDef->vcpus = nvcpus;
}
if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
goto endjob;
}
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainSetVcpus(virDomainPtr dom, unsigned int nvcpus)
{
return qemuDomainSetVcpusFlags(dom, nvcpus, VIR_DOMAIN_AFFECT_LIVE);
}
static int
qemuDomainPinVcpuFlags(virDomainPtr dom,
unsigned int vcpu,
unsigned char *cpumap,
int maplen,
unsigned int flags) {
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr persistentDef = NULL;
virCgroupPtr cgroup_vcpu = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool doReset = false;
int newVcpuPinNum = 0;
virDomainVcpuPinDefPtr *newVcpuPin = NULL;
virBitmapPtr pcpumap = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
cfg = virQEMUDriverGetConfig(driver);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
priv = vm->privateData;
if (vcpu > (priv->nvcpupids-1)) {
virReportError(VIR_ERR_INVALID_ARG,
_("vcpu number out of range %d > %d"),
vcpu, priv->nvcpupids);
goto cleanup;
}
pcpumap = virBitmapNewData(cpumap, maplen);
if (!pcpumap)
goto cleanup;
if (virBitmapIsAllClear(pcpumap)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("Empty cpu list for pinning"));
goto cleanup;
}
/* pinning to all physical cpus means resetting,
* so check if we can reset setting.
*/
if (virBitmapIsAllSet(pcpumap))
doReset = true;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (priv->vcpupids == NULL) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not supported"));
goto cleanup;
}
if (vm->def->cputune.vcpupin) {
newVcpuPin = virDomainVcpuPinDefCopy(vm->def->cputune.vcpupin,
vm->def->cputune.nvcpupin);
if (!newVcpuPin)
goto cleanup;
newVcpuPinNum = vm->def->cputune.nvcpupin;
} else {
if (VIR_ALLOC(newVcpuPin) < 0) {
virReportOOMError();
goto cleanup;
}
newVcpuPinNum = 0;
}
if (virDomainVcpuPinAdd(&newVcpuPin, &newVcpuPinNum, cpumap, maplen, vcpu) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to update vcpupin"));
virDomainVcpuPinDefArrayFree(newVcpuPin, newVcpuPinNum);
goto cleanup;
}
/* Configure the corresponding cpuset cgroup before set affinity. */
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET)) {
if (virCgroupNewVcpu(priv->cgroup, vcpu, false, &cgroup_vcpu) == 0 &&
qemuSetupCgroupVcpuPin(cgroup_vcpu, newVcpuPin, newVcpuPinNum, vcpu) < 0) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("failed to set cpuset.cpus in cgroup"
" for vcpu %d"), vcpu);
goto cleanup;
}
} else {
if (virProcessSetAffinity(priv->vcpupids[vcpu], pcpumap) < 0) {
virReportError(VIR_ERR_SYSTEM_ERROR,
_("failed to set cpu affinity for vcpu %d"),
vcpu);
goto cleanup;
}
}
if (doReset) {
if (virDomainVcpuPinDel(vm->def, vcpu) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to delete vcpupin xml of "
"a running domain"));
goto cleanup;
}
} else {
if (vm->def->cputune.vcpupin)
virDomainVcpuPinDefArrayFree(vm->def->cputune.vcpupin, vm->def->cputune.nvcpupin);
vm->def->cputune.vcpupin = newVcpuPin;
vm->def->cputune.nvcpupin = newVcpuPinNum;
newVcpuPin = NULL;
}
if (newVcpuPin)
virDomainVcpuPinDefArrayFree(newVcpuPin, newVcpuPinNum);
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (doReset) {
if (virDomainVcpuPinDel(persistentDef, vcpu) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to delete vcpupin xml of "
"a persistent domain"));
goto cleanup;
}
} else {
if (!persistentDef->cputune.vcpupin) {
if (VIR_ALLOC(persistentDef->cputune.vcpupin) < 0) {
virReportOOMError();
goto cleanup;
}
persistentDef->cputune.nvcpupin = 0;
}
if (virDomainVcpuPinAdd(&persistentDef->cputune.vcpupin,
&persistentDef->cputune.nvcpupin,
cpumap,
maplen,
vcpu) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to update or add vcpupin xml of "
"a persistent domain"));
goto cleanup;
}
}
ret = virDomainSaveConfig(cfg->configDir, persistentDef);
goto cleanup;
}
ret = 0;
cleanup:
if (cgroup_vcpu)
virCgroupFree(&cgroup_vcpu);
if (vm)
virObjectUnlock(vm);
virBitmapFree(pcpumap);
virObjectUnref(caps);
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) {
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr targetDef = NULL;
int ret = -1;
int maxcpu, hostcpus, vcpu, pcpu;
int n;
virDomainVcpuPinDefPtr *vcpupin_list;
virBitmapPtr cpumask = NULL;
unsigned char *cpumap;
bool pinned;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&targetDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
targetDef = vm->def;
}
/* Coverity didn't realize that targetDef must be set if we got here. */
sa_assert(targetDef);
if ((hostcpus = nodeGetCPUCount()) < 0)
goto cleanup;
maxcpu = maplen * 8;
if (maxcpu > hostcpus)
maxcpu = hostcpus;
/* Clamp to actual number of vcpus */
if (ncpumaps > targetDef->vcpus)
ncpumaps = targetDef->vcpus;
if (ncpumaps < 1) {
goto cleanup;
}
/* initialize cpumaps */
memset(cpumaps, 0xff, maplen * ncpumaps);
if (maxcpu % 8) {
for (vcpu = 0; vcpu < ncpumaps; vcpu++) {
cpumap = VIR_GET_CPUMAP(cpumaps, maplen, vcpu);
cpumap[maplen - 1] &= (1 << maxcpu % 8) - 1;
}
}
/* if vcpupin setting exists, there are unused physical cpus */
for (n = 0; n < targetDef->cputune.nvcpupin; n++) {
vcpupin_list = targetDef->cputune.vcpupin;
vcpu = vcpupin_list[n]->vcpuid;
cpumask = vcpupin_list[n]->cpumask;
cpumap = VIR_GET_CPUMAP(cpumaps, maplen, vcpu);
for (pcpu = 0; pcpu < maxcpu; pcpu++) {
if (virBitmapGetBit(cpumask, pcpu, &pinned) < 0)
goto cleanup;
if (!pinned)
VIR_UNUSE_CPU(cpumap, pcpu);
}
}
ret = ncpumaps;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
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;
pid_t pid;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool doReset = false;
int newVcpuPinNum = 0;
virDomainVcpuPinDefPtr *newVcpuPin = NULL;
virBitmapPtr pcpumap = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
cfg = virQEMUDriverGetConfig(driver);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (vm->def->placement_mode == VIR_DOMAIN_CPU_PLACEMENT_MODE_AUTO) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Changing affinity for emulator thread dynamically "
"is not allowed when CPU placement is 'auto'"));
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
priv = vm->privateData;
pcpumap = virBitmapNewData(cpumap, maplen);
if (!pcpumap)
goto cleanup;
if (virBitmapIsAllClear(pcpumap)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("Empty cpu list for pinning"));
goto cleanup;
}
/* pinning to all physical cpus means resetting,
* so check if we can reset setting.
*/
if (virBitmapIsAllSet(pcpumap))
doReset = true;
pid = vm->pid;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (priv->vcpupids != NULL) {
if (VIR_ALLOC(newVcpuPin) < 0) {
virReportOOMError();
goto cleanup;
}
if (virDomainVcpuPinAdd(&newVcpuPin, &newVcpuPinNum, cpumap, maplen, -1) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to update vcpupin"));
virDomainVcpuPinDefArrayFree(newVcpuPin, newVcpuPinNum);
goto cleanup;
}
if (virCgroupHasController(priv->cgroup,
VIR_CGROUP_CONTROLLER_CPUSET)) {
/*
* Configure the corresponding cpuset cgroup.
* If no cgroup for domain or hypervisor exists, do nothing.
*/
if (virCgroupNewEmulator(priv->cgroup, false, &cgroup_emulator) == 0) {
if (qemuSetupCgroupEmulatorPin(cgroup_emulator,
newVcpuPin[0]->cpumask) < 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("failed to set cpuset.cpus in cgroup"
" for emulator threads"));
goto cleanup;
}
}
} else {
if (virProcessSetAffinity(pid, pcpumap) < 0) {
virReportError(VIR_ERR_SYSTEM_ERROR, "%s",
_("failed to set cpu affinity for "
"emulator threads"));
goto cleanup;
}
}
if (doReset) {
if (virDomainEmulatorPinDel(vm->def) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to delete emulatorpin xml of "
"a running domain"));
goto cleanup;
}
} else {
virDomainVcpuPinDefFree(vm->def->cputune.emulatorpin);
vm->def->cputune.emulatorpin = newVcpuPin[0];
VIR_FREE(newVcpuPin);
}
if (newVcpuPin)
virDomainVcpuPinDefArrayFree(newVcpuPin, newVcpuPinNum);
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not supported"));
goto cleanup;
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (doReset) {
if (virDomainEmulatorPinDel(persistentDef) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to delete emulatorpin xml of "
"a persistent domain"));
goto cleanup;
}
} else {
if (virDomainEmulatorPinAdd(persistentDef, cpumap, maplen) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to update or add emulatorpin xml "
"of a persistent domain"));
goto cleanup;
}
}
ret = virDomainSaveConfig(cfg->configDir, persistentDef);
goto cleanup;
}
ret = 0;
cleanup:
if (cgroup_emulator)
virCgroupFree(&cgroup_emulator);
virBitmapFree(pcpumap);
virObjectUnref(caps);
if (vm)
virObjectUnlock(vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetEmulatorPinInfo(virDomainPtr dom,
unsigned char *cpumaps,
int maplen,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainDefPtr targetDef = NULL;
int ret = -1;
int maxcpu, hostcpus, pcpu;
virBitmapPtr cpumask = NULL;
bool pinned;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt,
vm, &flags, &targetDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE)
targetDef = vm->def;
/* Coverity didn't realize that targetDef must be set if we got here. */
sa_assert(targetDef);
if ((hostcpus = nodeGetCPUCount()) < 0)
goto cleanup;
maxcpu = maplen * 8;
if (maxcpu > hostcpus)
maxcpu = hostcpus;
/* initialize cpumaps */
memset(cpumaps, 0xff, maplen);
if (maxcpu % 8) {
cpumaps[maplen - 1] &= (1 << maxcpu % 8) - 1;
}
if (targetDef->cputune.emulatorpin) {
cpumask = targetDef->cputune.emulatorpin->cpumask;
} else if (targetDef->cpumask) {
cpumask = targetDef->cpumask;
} else {
ret = 0;
goto cleanup;
}
for (pcpu = 0; pcpu < maxcpu; pcpu++) {
if (virBitmapGetBit(cpumask, pcpu, &pinned) < 0)
goto cleanup;
if (!pinned)
VIR_UNUSE_CPU(cpumaps, pcpu);
}
ret = 1;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
return ret;
}
static int
qemuDomainGetVcpus(virDomainPtr dom,
virVcpuInfoPtr info,
int maxinfo,
unsigned char *cpumaps,
int maplen) {
virDomainObjPtr vm;
int i, v, maxcpu, hostcpus;
int ret = -1;
qemuDomainObjPrivatePtr priv;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s",
_("cannot list vcpu pinning for an inactive domain"));
goto cleanup;
}
priv = vm->privateData;
if ((hostcpus = nodeGetCPUCount()) < 0)
goto cleanup;
maxcpu = maplen * 8;
if (maxcpu > hostcpus)
maxcpu = hostcpus;
/* Clamp to actual number of vcpus */
if (maxinfo > priv->nvcpupids)
maxinfo = priv->nvcpupids;
if (maxinfo >= 1) {
if (info != NULL) {
memset(info, 0, sizeof(*info) * maxinfo);
for (i = 0; i < maxinfo; i++) {
info[i].number = i;
info[i].state = VIR_VCPU_RUNNING;
if (priv->vcpupids != NULL &&
qemuGetProcessInfo(&(info[i].cpuTime),
&(info[i].cpu),
NULL,
vm->pid,
priv->vcpupids[i]) < 0) {
virReportSystemError(errno, "%s",
_("cannot get vCPU placement & pCPU time"));
goto cleanup;
}
}
}
if (cpumaps != NULL) {
memset(cpumaps, 0, maplen * maxinfo);
if (priv->vcpupids != NULL) {
for (v = 0; v < maxinfo; v++) {
unsigned char *cpumap = VIR_GET_CPUMAP(cpumaps, maplen, v);
virBitmapPtr map = NULL;
unsigned char *tmpmap = NULL;
int tmpmapLen = 0;
if (virProcessGetAffinity(priv->vcpupids[v],
&map, maxcpu) < 0)
goto cleanup;
virBitmapToData(map, &tmpmap, &tmpmapLen);
if (tmpmapLen > maplen)
tmpmapLen = maplen;
memcpy(cpumap, tmpmap, tmpmapLen);
VIR_FREE(tmpmap);
virBitmapFree(map);
}
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not available"));
goto cleanup;
}
}
}
ret = maxinfo;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainGetVcpusFlags(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr def;
int ret = -1;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_VCPU_MAXIMUM, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt,
vm, &flags, &def) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
def = vm->def;
}
ret = (flags & VIR_DOMAIN_VCPU_MAXIMUM) ? def->maxvcpus : def->vcpus;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
return ret;
}
static int
qemuDomainGetMaxVcpus(virDomainPtr dom)
{
return qemuDomainGetVcpusFlags(dom, (VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_VCPU_MAXIMUM));
}
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 (!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 (virSecurityManagerGetProcessLabel(driver->securityManager,
vm->def, vm->pid, seclabel) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Failed to get security label"));
goto cleanup;
}
}
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int qemuDomainGetSecurityLabelList(virDomainPtr dom,
virSecurityLabelPtr* seclabels)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int i, ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
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 = virSecurityManagerGetNested(
driver->securityManager);
if (!mgrs)
goto cleanup;
/* Allocate seclabels array */
for (i = 0; mgrs[i]; i++)
len++;
if (VIR_ALLOC_N((*seclabels), len) < 0) {
virReportOOMError();
VIR_FREE(mgrs);
goto cleanup;
}
memset(*seclabels, 0, sizeof(**seclabels) * len);
/* Fill the array */
for (i = 0; i < len; i++) {
if (virSecurityManagerGetProcessLabel(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:
if (vm)
virObjectUnlock(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;
/* 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;
}
/* Return -1 on most failures after raising error, -2 if edit was specified
* but xmlin and state (-1 for no change, 0 for paused, 1 for running) do
* not represent any changes (no error raised), -3 if corrupt image was
* unlinked (no error raised), and opened fd on success. */
static int ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4)
qemuDomainSaveImageOpen(virQEMUDriverPtr driver,
const char *path,
virDomainDefPtr *ret_def,
virQEMUSaveHeaderPtr ret_header,
bool bypass_cache,
virFileWrapperFdPtr *wrapperFd,
const char *xmlin, int state, bool edit,
bool unlink_corrupt)
{
int fd = -1;
virQEMUSaveHeader header;
char *xml = NULL;
virDomainDefPtr def = NULL;
int oflags = edit ? O_RDWR : O_RDONLY;
virCapsPtr caps = NULL;
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, path, oflags, NULL, NULL)) < 0)
goto error;
if (bypass_cache &&
!(*wrapperFd = virFileWrapperFdNew(&fd, path,
VIR_FILE_WRAPPER_BYPASS_CACHE)))
goto error;
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);
goto error;
}
return -3;
}
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);
goto error;
}
return -3;
}
}
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.xml_len <= 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("invalid XML length: %d"), header.xml_len);
goto error;
}
if (VIR_ALLOC_N(xml, header.xml_len) < 0) {
virReportOOMError();
goto error;
}
if (saferead(fd, xml, header.xml_len) != header.xml_len) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to read XML"));
goto error;
}
if (edit && STREQ(xml, xmlin) &&
(state < 0 || state == header.was_running)) {
VIR_FREE(xml);
if (VIR_CLOSE(fd) < 0) {
virReportSystemError(errno, _("cannot close file: %s"), path);
goto error;
}
return -2;
}
if (state >= 0)
header.was_running = state;
/* Create a domain from this XML */
if (!(def = virDomainDefParseString(xml, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto error;
if (xmlin) {
virDomainDefPtr def2 = NULL;
if (!(def2 = virDomainDefParseString(xmlin, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto error;
if (!virDomainDefCheckABIStability(def, def2)) {
virDomainDefFree(def2);
goto error;
}
virDomainDefFree(def);
def = def2;
}
VIR_FREE(xml);
*ret_def = def;
*ret_header = header;
virObjectUnref(caps);
return fd;
error:
virDomainDefFree(def);
VIR_FREE(xml);
VIR_FORCE_CLOSE(fd);
virObjectUnref(caps);
return -1;
}
static int ATTRIBUTE_NONNULL(4) ATTRIBUTE_NONNULL(5) ATTRIBUTE_NONNULL(6)
qemuDomainSaveImageStartVM(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
int *fd,
const virQEMUSaveHeaderPtr header,
const char *path,
bool start_paused)
{
int ret = -1;
virDomainEventPtr event;
int intermediatefd = -1;
virCommandPtr cmd = NULL;
char *errbuf = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
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;
}
}
/* Set the migration source and start it up. */
ret = qemuProcessStart(conn, driver, vm, "stdio", *fd, path, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_RESTORE,
VIR_QEMU_PROCESS_START_PAUSED);
if (intermediatefd != -1) {
if (ret < 0) {
/* 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, 0);
ret = -1;
}
VIR_DEBUG("Decompression binary stderr: %s", NULLSTR(errbuf));
}
VIR_FORCE_CLOSE(intermediatefd);
if (VIR_CLOSE(*fd) < 0) {
virReportSystemError(errno, _("cannot close file: %s"), path);
ret = -1;
}
if (ret < 0) {
virDomainAuditStart(vm, "restored", false);
goto cleanup;
}
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_RESTORED);
virDomainAuditStart(vm, "restored", true);
if (event)
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,
QEMU_ASYNC_JOB_NONE) < 0) {
if (virGetLastError() == NULL)
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to resume domain"));
goto cleanup;
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 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 = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
detail);
if (event)
qemuDomainEventQueue(driver, event);
}
ret = 0;
cleanup:
virCommandFree(cmd);
VIR_FREE(errbuf);
if (virSecurityManagerRestoreSavedStateLabel(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;
virDomainDefPtr def = NULL;
virDomainObjPtr vm = NULL;
int fd = -1;
int ret = -1;
virQEMUSaveHeader header;
virFileWrapperFdPtr wrapperFd = NULL;
int state = -1;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
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, &header,
(flags & VIR_DOMAIN_SAVE_BYPASS_CACHE) != 0,
&wrapperFd, dxml, state, false, false);
if (fd < 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;
def = NULL;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
ret = qemuDomainSaveImageStartVM(conn, driver, vm, &fd, &header, path,
false);
if (virFileWrapperFdClose(wrapperFd) < 0)
VIR_WARN("Failed to close %s", path);
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
else if (ret < 0 && !vm->persistent) {
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
}
cleanup:
virDomainDefFree(def);
VIR_FORCE_CLOSE(fd);
virFileWrapperFdFree(wrapperFd);
if (vm)
virObjectUnlock(vm);
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;
virQEMUSaveHeader header;
/* We only take subset of virDomainDefFormat flags. */
virCheckFlags(VIR_DOMAIN_XML_SECURE, NULL);
fd = qemuDomainSaveImageOpen(driver, path, &def, &header, false, NULL,
NULL, -1, false, false);
if (fd < 0)
goto cleanup;
ret = qemuDomainDefFormatXML(driver, def, flags);
cleanup:
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;
int fd = -1;
virQEMUSaveHeader header;
char *xml = NULL;
size_t len;
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, &header, false, NULL,
dxml, state, true, false);
if (fd < 0) {
/* Check for special case of no change needed. */
if (fd == -2)
ret = 0;
goto cleanup;
}
xml = qemuDomainDefFormatXML(driver, def,
VIR_DOMAIN_XML_INACTIVE |
VIR_DOMAIN_XML_SECURE |
VIR_DOMAIN_XML_MIGRATABLE);
if (!xml)
goto cleanup;
len = strlen(xml) + 1;
if (len > header.xml_len) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("new xml too large to fit in file"));
goto cleanup;
}
if (VIR_EXPAND_N(xml, len, header.xml_len - len) < 0) {
virReportOOMError();
goto cleanup;
}
if (lseek(fd, 0, SEEK_SET) != 0) {
virReportSystemError(errno, _("cannot seek in '%s'"), path);
goto cleanup;
}
if (safewrite(fd, &header, sizeof(header)) != sizeof(header) ||
safewrite(fd, xml, len) != len ||
VIR_CLOSE(fd) < 0) {
virReportSystemError(errno, _("failed to write xml to '%s'"), path);
goto cleanup;
}
ret = 0;
cleanup:
virDomainDefFree(def);
VIR_FORCE_CLOSE(fd);
VIR_FREE(xml);
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)
{
virDomainDefPtr def = NULL;
int fd = -1;
int ret = -1;
virQEMUSaveHeader header;
virFileWrapperFdPtr wrapperFd = NULL;
fd = qemuDomainSaveImageOpen(driver, path, &def, &header,
bypass_cache, &wrapperFd, NULL, -1, false,
true);
if (fd < 0) {
if (fd == -3)
ret = 1;
goto cleanup;
}
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, &header, path,
start_paused);
if (virFileWrapperFdClose(wrapperFd) < 0)
VIR_WARN("Failed to close %s", path);
cleanup:
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;
unsigned long long balloon;
int err = 0;
qemuDomainObjPrivatePtr priv;
/* Flags checked by virDomainDefFormat */
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
/* Refresh current memory based on balloon info if supported */
if ((vm->def->memballoon != NULL) &&
(vm->def->memballoon->model != VIR_DOMAIN_MEMBALLOON_MODEL_NONE) &&
!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BALLOON_EVENT) &&
(virDomainObjIsActive(vm))) {
/* Don't delay if someone's using the monitor, just use
* existing most recent data instead */
if (qemuDomainJobAllowed(priv, QEMU_JOB_QUERY)) {
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;
}
qemuDomainObjEnterMonitor(driver, vm);
err = qemuMonitorGetBalloonInfo(priv->mon, &balloon);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
if (err < 0)
goto cleanup;
if (err > 0)
vm->def->mem.cur_balloon = balloon;
/* err == 0 indicates no balloon support, so ignore it */
}
}
if ((flags & VIR_DOMAIN_XML_MIGRATABLE))
flags |= QEMU_DOMAIN_FORMAT_LIVE_FLAGS;
ret = qemuDomainFormatXML(driver, vm, flags);
cleanup:
if (vm)
virObjectUnlock(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 (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;
virDomainDefPtr def = NULL;
virDomainChrSourceDef monConfig;
virQEMUCapsPtr qemuCaps = NULL;
bool monitor_json = false;
virCommandPtr cmd = NULL;
char *ret = NULL;
int i;
virQEMUDriverConfigPtr cfg;
virCapsPtr caps = NULL;
virCheckFlags(0, NULL);
cfg = virQEMUDriverGetConfig(driver);
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 = virDomainDefParseString(xmlData, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES, 0);
if (!def)
goto cleanup;
if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, def->emulator)))
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 < def->nnets; i++) {
virDomainNetDefPtr net = def->nets[i];
int bootIndex = net->info.bootIndex;
char *model = net->model;
if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) {
int actualType = virDomainNetGetActualType(net);
const char *brname;
VIR_FREE(net->data.network.name);
VIR_FREE(net->data.network.portgroup);
if ((actualType == VIR_DOMAIN_NET_TYPE_BRIDGE) &&
(brname = virDomainNetGetActualBridgeName(net))) {
char *brnamecopy;
if (VIR_STRDUP(brnamecopy, brname) < 0)
goto cleanup;
virDomainActualNetDefFree(net->data.network.actual);
memset(net, 0, sizeof(*net));
net->type = VIR_DOMAIN_NET_TYPE_ETHERNET;
net->script = NULL;
net->data.ethernet.dev = brnamecopy;
net->data.ethernet.ipaddr = NULL;
} else {
/* actualType is either NETWORK or DIRECT. In either
* case, the best we can do is NULL everything out.
*/
virDomainActualNetDefFree(net->data.network.actual);
memset(net, 0, sizeof(*net));
net->type = VIR_DOMAIN_NET_TYPE_ETHERNET;
net->script = NULL;
net->data.ethernet.dev = NULL;
net->data.ethernet.ipaddr = NULL;
}
} else if (net->type == VIR_DOMAIN_NET_TYPE_DIRECT) {
VIR_FREE(net->data.direct.linkdev);
memset(net, 0, sizeof(*net));
net->type = VIR_DOMAIN_NET_TYPE_ETHERNET;
net->script = NULL;
net->data.ethernet.dev = NULL;
net->data.ethernet.ipaddr = NULL;
} else if (net->type == VIR_DOMAIN_NET_TYPE_BRIDGE) {
char *script = net->script;
char *brname = net->data.bridge.brname;
char *ipaddr = net->data.bridge.ipaddr;
memset(net, 0, sizeof(*net));
net->type = VIR_DOMAIN_NET_TYPE_ETHERNET;
net->script = script;
net->data.ethernet.dev = brname;
net->data.ethernet.ipaddr = ipaddr;
}
VIR_FREE(net->virtPortProfile);
net->info.bootIndex = bootIndex;
net->model = model;
}
monitor_json = virQEMUCapsGet(qemuCaps, QEMU_CAPS_MONITOR_JSON);
if (qemuProcessPrepareMonitorChr(cfg, &monConfig, def->name) < 0)
goto cleanup;
if (qemuAssignDeviceAliases(def, qemuCaps) < 0)
goto cleanup;
if (qemuDomainAssignAddresses(def, qemuCaps, NULL) < 0)
goto cleanup;
/* do fake auto-alloc of graphics ports, if such config is used */
for (i = 0; i < def->ngraphics; ++i) {
virDomainGraphicsDefPtr graphics = def->graphics[i];
if (graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC &&
!graphics->data.vnc.socket && graphics->data.vnc.autoport) {
graphics->data.vnc.port = 5900;
} else if (graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_SPICE) {
int j;
bool needTLSPort = false;
bool needPort = false;
int defaultMode = graphics->data.spice.defaultMode;
if (graphics->data.spice.autoport) {
/* check if tlsPort or port need allocation */
for (j = 0; j < VIR_DOMAIN_GRAPHICS_SPICE_CHANNEL_LAST; j++) {
switch (graphics->data.spice.channels[j]) {
case VIR_DOMAIN_GRAPHICS_SPICE_CHANNEL_MODE_SECURE:
needTLSPort = true;
break;
case VIR_DOMAIN_GRAPHICS_SPICE_CHANNEL_MODE_INSECURE:
needPort = true;
break;
case VIR_DOMAIN_GRAPHICS_SPICE_CHANNEL_MODE_ANY:
switch (defaultMode) {
case VIR_DOMAIN_GRAPHICS_SPICE_CHANNEL_MODE_SECURE:
needTLSPort = true;
break;
case VIR_DOMAIN_GRAPHICS_SPICE_CHANNEL_MODE_INSECURE:
needPort = true;
break;
case VIR_DOMAIN_GRAPHICS_SPICE_CHANNEL_MODE_ANY:
needTLSPort = true;
needPort = true;
break;
}
break;
}
}
}
if (needPort || graphics->data.spice.port == -1)
graphics->data.spice.port = 5901;
if (needTLSPort || graphics->data.spice.tlsPort == -1)
graphics->data.spice.tlsPort = 5902;
}
}
if (!(cmd = qemuBuildCommandLine(conn, driver, def,
&monConfig, monitor_json, qemuCaps,
NULL, -1, NULL, VIR_NETDEV_VPORT_PROFILE_OP_NO_OP,
&buildCommandLineCallbacks)))
goto cleanup;
ret = virCommandToString(cmd);
cleanup:
virObjectUnref(qemuCaps);
virCommandFree(cmd);
virDomainDefFree(def);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int qemuConnectListDefinedDomains(virConnectPtr conn,
char **const names, int nnames) {
virQEMUDriverPtr driver = conn->privateData;
int n;
n = virDomainObjListGetInactiveNames(driver->domains, names, nnames);
return n;
}
static int qemuConnectNumOfDefinedDomains(virConnectPtr conn) {
virQEMUDriverPtr driver = conn->privateData;
int n;
n = virDomainObjListNumOfDomains(driver->domains, 0);
return n;
}
static int
qemuDomainObjStart(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int flags)
{
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;
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 {
ret = qemuDomainObjRestore(conn, driver, vm, managed_save,
start_paused, bypass_cache);
if (ret == 0) {
if (unlink(managed_save) < 0)
VIR_WARN("Failed to remove the managed state %s", managed_save);
else
vm->hasManagedSave = false;
}
if (ret > 0)
VIR_WARN("Ignoring incomplete managed state %s", managed_save);
else
goto cleanup;
}
}
ret = qemuProcessStart(conn, driver, vm, NULL, -1, NULL, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE, start_flags);
virDomainAuditStart(vm, "booted", ret >= 0);
if (ret >= 0) {
virDomainEventPtr event =
virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
VIR_DOMAIN_EVENT_STARTED_BOOTED);
if (event) {
qemuDomainEventQueue(driver, event);
if (start_paused) {
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_PAUSED);
if (event)
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);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 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) < 0)
goto endjob;
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainCreate(virDomainPtr dom)
{
return qemuDomainCreateWithFlags(dom, 0);
}
static virDomainPtr qemuDomainDefineXML(virConnectPtr conn, const char *xml) {
virQEMUDriverPtr driver = conn->privateData;
virDomainDefPtr def = NULL;
virDomainDefPtr oldDef = NULL;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
virDomainEventPtr event = NULL;
virQEMUCapsPtr qemuCaps = NULL;
virQEMUDriverConfigPtr cfg;
virCapsPtr caps = NULL;
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(xml, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (virSecurityManagerVerify(driver->securityManager, def) < 0)
goto cleanup;
if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, def->emulator)))
goto cleanup;
if (qemuCanonicalizeMachine(def, qemuCaps) < 0)
goto cleanup;
if (qemuDomainAssignAddresses(def, qemuCaps, NULL) < 0)
goto cleanup;
if (!(vm = virDomainObjListAdd(driver->domains, def,
driver->xmlopt,
0, &oldDef)))
goto cleanup;
def = NULL;
if (virDomainHasDiskMirror(vm)) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE, "%s",
_("domain has active block copy job"));
virDomainObjAssignDef(vm, NULL, false, NULL);
goto cleanup;
}
vm->persistent = 1;
if (virDomainSaveConfig(cfg->configDir,
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);
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
}
goto cleanup;
}
event = virDomainEventNewFromObj(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);
if (dom) dom->id = vm->def->id;
cleanup:
virDomainDefFree(oldDef);
virDomainDefFree(def);
if (vm)
virObjectUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
virObjectUnref(qemuCaps);
virObjectUnref(caps);
virObjectUnref(cfg);
return dom;
}
static int
qemuDomainUndefineFlags(virDomainPtr dom,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainEventPtr event = NULL;
char *name = NULL;
int ret = -1;
int nsnapshots;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE |
VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
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 (virDomainDeleteConfig(cfg->configDir, cfg->autostartDir, vm) < 0)
goto cleanup;
event = virDomainEventNewFromObj(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.
*/
if (virDomainObjIsActive(vm)) {
vm->persistent = 0;
} else {
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
}
ret = 0;
cleanup:
VIR_FREE(name);
if (vm)
virObjectUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainUndefine(virDomainPtr dom)
{
return qemuDomainUndefineFlags(dom, 0);
}
static int
qemuDomainAttachDeviceDiskLive(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk = dev->data.disk;
virDomainDiskDefPtr orig_disk = NULL;
virDomainDeviceDefPtr dev_copy = NULL;
virDomainDiskDefPtr tmp = NULL;
virCgroupPtr cgroup = NULL;
virCapsPtr caps = NULL;
int ret = -1;
if (disk->driverName != NULL && !STREQ(disk->driverName, "qemu")) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unsupported driver name '%s' for disk '%s'"),
disk->driverName, disk->src);
goto end;
}
if (qemuTranslateDiskSourcePool(conn, disk) < 0)
goto end;
if (qemuAddSharedDevice(driver, dev, vm->def->name) < 0)
goto end;
if (qemuSetUnprivSGIO(dev) < 0)
goto end;
if (qemuDomainDetermineDiskChain(driver, disk, false) < 0)
goto end;
if (qemuSetupDiskCgroup(vm, disk) < 0)
goto end;
switch (disk->device) {
case VIR_DOMAIN_DISK_DEVICE_CDROM:
case VIR_DOMAIN_DISK_DEVICE_FLOPPY:
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 end;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto end;
tmp = dev->data.disk;
dev->data.disk = orig_disk;
if (!(dev_copy = virDomainDeviceDefCopy(dev, vm->def,
caps, driver->xmlopt))) {
dev->data.disk = tmp;
goto end;
}
dev->data.disk = tmp;
ret = qemuDomainChangeEjectableMedia(driver, vm, disk, orig_disk, false);
/* 'disk' must not be accessed now - it has been free'd.
* 'orig_disk' now points to the new disk, while 'dev_copy'
* now points to the old disk */
/* Need to remove the shared disk entry for the original disk src
* if the operation is either ejecting or updating.
*/
if (ret == 0)
ignore_value(qemuRemoveSharedDevice(driver, dev_copy,
vm->def->name));
break;
case VIR_DOMAIN_DISK_DEVICE_DISK:
case VIR_DOMAIN_DISK_DEVICE_LUN:
if (disk->bus == VIR_DOMAIN_DISK_BUS_USB) {
if (disk->device == VIR_DOMAIN_DISK_DEVICE_LUN) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("disk device='lun' is not supported for usb bus"));
break;
}
ret = qemuDomainAttachUsbMassstorageDevice(conn, driver, vm,
disk);
} else if (disk->bus == VIR_DOMAIN_DISK_BUS_VIRTIO) {
ret = qemuDomainAttachVirtioDiskDevice(conn, driver, vm, disk);
} else if (disk->bus == VIR_DOMAIN_DISK_BUS_SCSI) {
ret = qemuDomainAttachSCSIDisk(conn, driver, vm, disk);
} else {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk bus '%s' cannot be hotplugged."),
virDomainDiskBusTypeToString(disk->bus));
}
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk device type '%s' cannot be hotplugged"),
virDomainDiskDeviceTypeToString(disk->device));
break;
}
if (ret != 0 && cgroup) {
if (qemuTeardownDiskCgroup(vm, disk) < 0)
VIR_WARN("Failed to teardown cgroup for disk path %s",
NULLSTR(disk->src));
}
end:
if (ret != 0)
ignore_value(qemuRemoveSharedDevice(driver, dev, vm->def->name));
virObjectUnref(caps);
virDomainDeviceDefFree(dev_copy);
return ret;
}
static int
qemuDomainAttachDeviceControllerLive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virDomainControllerDefPtr cont = dev->data.controller;
int ret = -1;
switch (cont->type) {
case VIR_DOMAIN_CONTROLLER_TYPE_SCSI:
ret = qemuDomainAttachPciControllerDevice(driver, vm, cont);
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("'%s' controller cannot be hotplugged."),
virDomainControllerTypeToString(cont->type));
break;
}
return ret;
}
static int
qemuDomainAttachDeviceLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virDomainPtr dom)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int ret = -1;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
qemuDomainObjCheckDiskTaint(driver, vm, dev->data.disk, -1);
ret = qemuDomainAttachDeviceDiskLive(dom->conn, driver, vm, dev);
if (!ret)
dev->data.disk = NULL;
break;
case VIR_DOMAIN_DEVICE_CONTROLLER:
ret = qemuDomainAttachDeviceControllerLive(driver, vm, dev);
if (!ret)
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, -1);
ret = qemuDomainAttachNetDevice(dom->conn, driver, vm,
dev->data.net);
if (!ret)
dev->data.net = NULL;
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
ret = qemuDomainAttachHostDevice(driver, vm,
dev->data.hostdev);
if (!ret)
dev->data.hostdev = NULL;
break;
case VIR_DOMAIN_DEVICE_REDIRDEV:
ret = qemuDomainAttachRedirdevDevice(driver, vm,
dev->data.redirdev);
if (!ret)
dev->data.redirdev = NULL;
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("device type '%s' cannot be attached"),
virDomainDeviceTypeToString(dev->type));
break;
}
return ret;
}
static int
qemuDomainDetachDeviceDiskLive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk = dev->data.disk;
int ret = -1;
switch (disk->device) {
case VIR_DOMAIN_DISK_DEVICE_DISK:
case VIR_DOMAIN_DISK_DEVICE_LUN:
if (disk->bus == VIR_DOMAIN_DISK_BUS_VIRTIO)
ret = qemuDomainDetachVirtioDiskDevice(driver, vm, dev);
else if (disk->bus == VIR_DOMAIN_DISK_BUS_SCSI ||
disk->bus == VIR_DOMAIN_DISK_BUS_USB)
ret = qemuDomainDetachDiskDevice(driver, vm, dev);
else
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("This type of disk cannot be hot unplugged"));
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk device type '%s' cannot be detached"),
virDomainDiskDeviceTypeToString(disk->device));
break;
}
if (ret == 0)
ignore_value(qemuRemoveSharedDevice(driver, dev, vm->def->name));
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 = qemuDomainDetachPciControllerDevice(driver, vm, dev);
break;
default :
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("'%s' controller cannot be hotunplugged."),
virDomainControllerTypeToString(cont->type));
}
return ret;
}
static int
qemuDomainDetachDeviceLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virDomainPtr dom)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int ret = -1;
switch (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;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
"%s", _("This type of device cannot be hot unplugged"));
break;
}
return ret;
}
static int
qemuDomainChangeDiskMediaLive(virConnectPtr conn,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virQEMUDriverPtr driver,
bool force)
{
virDomainDiskDefPtr disk = dev->data.disk;
virDomainDiskDefPtr orig_disk = NULL;
virDomainDiskDefPtr tmp = NULL;
virDomainDeviceDefPtr dev_copy = NULL;
virCapsPtr caps = NULL;
int ret = -1;
if (qemuTranslateDiskSourcePool(conn, disk) < 0)
goto end;
if (qemuDomainDetermineDiskChain(driver, disk, false) < 0)
goto end;
if (qemuSetupDiskCgroup(vm, disk) < 0)
goto end;
switch (disk->device) {
case VIR_DOMAIN_DISK_DEVICE_CDROM:
case VIR_DOMAIN_DISK_DEVICE_FLOPPY:
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 end;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto end;
tmp = dev->data.disk;
dev->data.disk = orig_disk;
if (!(dev_copy = virDomainDeviceDefCopy(dev, vm->def,
caps, driver->xmlopt))) {
dev->data.disk = tmp;
goto end;
}
dev->data.disk = tmp;
/* Add the new disk src into shared disk hash table */
if (qemuAddSharedDevice(driver, dev, vm->def->name) < 0)
goto end;
ret = qemuDomainChangeEjectableMedia(driver, vm, disk, orig_disk, force);
/* 'disk' must not be accessed now - it has been freed.
* 'orig_disk' now points to the new disk, while 'dev_copy'
* now points to the old disk */
/* Need to remove the shared disk entry for the original
* disk src if the operation is either ejecting or updating.
*/
if (ret == 0) {
dev->data.disk = NULL;
ignore_value(qemuRemoveSharedDevice(driver, dev_copy,
vm->def->name));
}
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk bus '%s' cannot be updated."),
virDomainDiskBusTypeToString(disk->bus));
break;
}
if (ret != 0 &&
qemuTeardownDiskCgroup(vm, disk) < 0)
VIR_WARN("Failed to teardown cgroup for disk path %s",
NULLSTR(disk->src));
end:
virObjectUnref(caps);
virDomainDeviceDefFree(dev_copy);
return ret;
}
static int
qemuDomainUpdateDeviceLive(virConnectPtr conn,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virDomainPtr dom,
bool force)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int ret = -1;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
ret = qemuDomainChangeDiskMediaLive(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, dom, dev);
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("device type '%s' cannot be updated"),
virDomainDeviceTypeToString(dev->type));
break;
}
return ret;
}
static int
qemuDomainAttachDeviceConfig(virQEMUCapsPtr qemuCaps,
virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk;
virDomainNetDefPtr net;
virDomainHostdevDefPtr hostdev;
virDomainLeaseDefPtr lease;
virDomainControllerDefPtr controller;
switch (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 (virDomainDiskInsert(vmdef, disk)) {
virReportOOMError();
return -1;
}
/* vmdef has the pointer. Generic codes for vmdef will do all jobs */
dev->data.disk = NULL;
if (disk->bus != VIR_DOMAIN_DISK_BUS_VIRTIO)
if (virDomainDefAddImplicitControllers(vmdef) < 0)
return -1;
if (qemuDomainAssignAddresses(vmdef, qemuCaps, NULL) < 0)
return -1;
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if (virDomainNetInsert(vmdef, net)) {
virReportOOMError();
return -1;
}
dev->data.net = NULL;
if (qemuDomainAssignAddresses(vmdef, qemuCaps, NULL) < 0)
return -1;
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)) {
virReportOOMError();
return -1;
}
dev->data.hostdev = NULL;
if (qemuDomainAssignAddresses(vmdef, qemuCaps, NULL) < 0)
return -1;
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 (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;
if (qemuDomainAssignAddresses(vmdef, qemuCaps, NULL) < 0)
return -1;
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent attach of device is not supported"));
return -1;
}
return 0;
}
static int
qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk, det_disk;
virDomainNetDefPtr net;
virDomainHostdevDefPtr hostdev, det_hostdev;
virDomainLeaseDefPtr lease, det_lease;
virDomainControllerDefPtr cont, det_cont;
int idx;
char mac[VIR_MAC_STRING_BUFLEN];
switch (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;
idx = virDomainNetFindIdx(vmdef, net);
if (idx == -2) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("multiple devices matching mac address %s found"),
virMacAddrFormat(&net->mac, mac));
return -1;
} else if (idx < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("no matching network device was found"));
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;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent detach of device is not supported"));
return -1;
}
return 0;
}
static int
qemuDomainUpdateDeviceConfig(virQEMUCapsPtr qemuCaps,
virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr orig, disk;
virDomainNetDefPtr net;
int pos;
char mac[VIR_MAC_STRING_BUFLEN];
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
disk = dev->data.disk;
pos = virDomainDiskIndexByName(vmdef, disk->dst, false);
if (pos < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("target %s doesn't exist."), disk->dst);
return -1;
}
orig = vmdef->disks[pos];
if (!(orig->device == VIR_DOMAIN_DISK_DEVICE_CDROM) &&
!(orig->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("this disk doesn't support update"));
return -1;
}
/*
* Update 'orig'
* We allow updating src/type//driverType/cachemode/
*/
VIR_FREE(orig->src);
orig->src = disk->src;
orig->type = disk->type;
orig->cachemode = disk->cachemode;
if (disk->driverName) {
VIR_FREE(orig->driverName);
orig->driverName = disk->driverName;
disk->driverName = NULL;
}
if (disk->format)
orig->format = disk->format;
disk->src = NULL;
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
pos = virDomainNetFindIdx(vmdef, net);
if (pos == -2) {
virMacAddrFormat(&net->mac, mac);
virReportError(VIR_ERR_OPERATION_FAILED,
_("couldn't find matching device "
"with mac address %s"), mac);
return -1;
} else if (pos < 0) {
virMacAddrFormat(&net->mac, mac);
virReportError(VIR_ERR_OPERATION_FAILED,
_("couldn't find matching device "
"with mac address %s"), mac);
return -1;
}
virDomainNetDefFree(vmdef->nets[pos]);
vmdef->nets[pos] = net;
dev->data.net = NULL;
if (qemuDomainAssignAddresses(vmdef, qemuCaps, NULL) < 0)
return -1;
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent update of device is not supported"));
return -1;
}
return 0;
}
static int qemuDomainAttachDeviceFlags(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;
int ret = -1;
unsigned int affect;
virQEMUCapsPtr qemuCaps = NULL;
qemuDomainObjPrivatePtr priv;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
cfg = virQEMUDriverGetConfig(driver);
affect = flags & (VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
if (affect == VIR_DOMAIN_AFFECT_CURRENT)
flags |= VIR_DOMAIN_AFFECT_LIVE;
} else {
if (affect == VIR_DOMAIN_AFFECT_CURRENT)
flags |= VIR_DOMAIN_AFFECT_CONFIG;
/* check consistency between flags and the vm state */
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot do live update a device on "
"inactive domain"));
goto endjob;
}
}
if ((flags & VIR_DOMAIN_AFFECT_CONFIG) && !vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot modify device on transient domain"));
goto endjob;
}
dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
caps, driver->xmlopt,
VIR_DOMAIN_XML_INACTIVE);
if (dev == NULL)
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 (priv->qemuCaps)
qemuCaps = virObjectRef(priv->qemuCaps);
else if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, vm->def->emulator)))
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (virDomainDefCompatibleDevice(vm->def, dev) < 0)
goto endjob;
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt);
if (!vmdef)
goto endjob;
if ((ret = qemuDomainAttachDeviceConfig(qemuCaps, vmdef, dev)) < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (virDomainDefCompatibleDevice(vm->def, dev_copy) < 0)
goto endjob;
if ((ret = qemuDomainAttachDeviceLive(vm, dev_copy, dom)) < 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) < 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, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
virObjectUnref(qemuCaps);
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
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;
unsigned int affect;
virQEMUCapsPtr qemuCaps = NULL;
qemuDomainObjPrivatePtr priv;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_DEVICE_MODIFY_FORCE, -1);
cfg = virQEMUDriverGetConfig(driver);
affect = flags & (VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
if (affect == VIR_DOMAIN_AFFECT_CURRENT)
flags |= VIR_DOMAIN_AFFECT_LIVE;
} else {
if (affect == VIR_DOMAIN_AFFECT_CURRENT)
flags |= VIR_DOMAIN_AFFECT_CONFIG;
/* check consistency between flags and the vm state */
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot do live update a device on "
"inactive domain"));
goto endjob;
}
}
if ((flags & VIR_DOMAIN_AFFECT_CONFIG) && !vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot modify device on transient domain"));
goto endjob;
}
dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
caps, driver->xmlopt,
VIR_DOMAIN_XML_INACTIVE);
if (dev == NULL)
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 (priv->qemuCaps)
qemuCaps = virObjectRef(priv->qemuCaps);
else if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, vm->def->emulator)))
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (virDomainDefCompatibleDevice(vm->def, dev) < 0)
goto endjob;
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt);
if (!vmdef)
goto endjob;
if ((ret = qemuDomainUpdateDeviceConfig(qemuCaps, vmdef, dev)) < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (virDomainDefCompatibleDevice(vm->def, dev_copy) < 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) < 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, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
virObjectUnref(qemuCaps);
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int qemuDomainDetachDeviceFlags(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;
int ret = -1;
unsigned int affect;
virQEMUCapsPtr qemuCaps = NULL;
qemuDomainObjPrivatePtr priv;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
cfg = virQEMUDriverGetConfig(driver);
affect = flags & (VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
if (affect == VIR_DOMAIN_AFFECT_CURRENT)
flags |= VIR_DOMAIN_AFFECT_LIVE;
} else {
if (affect == VIR_DOMAIN_AFFECT_CURRENT)
flags |= VIR_DOMAIN_AFFECT_CONFIG;
/* check consistency between flags and the vm state */
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot do live update a device on "
"inactive domain"));
goto endjob;
}
}
if ((flags & VIR_DOMAIN_AFFECT_CONFIG) && !vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot modify device on transient domain"));
goto endjob;
}
dev = dev_copy = virDomainDeviceDefParse(xml, vm->def,
caps, driver->xmlopt,
VIR_DOMAIN_XML_INACTIVE);
if (dev == NULL)
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 (priv->qemuCaps)
qemuCaps = virObjectRef(priv->qemuCaps);
else if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, vm->def->emulator)))
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (virDomainDefCompatibleDevice(vm->def, dev) < 0)
goto endjob;
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(vm, caps, driver->xmlopt);
if (!vmdef)
goto endjob;
if ((ret = qemuDomainDetachDeviceConfig(vmdef, dev)) < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (virDomainDefCompatibleDevice(vm->def, dev_copy) < 0)
goto endjob;
if ((ret = qemuDomainDetachDeviceLive(vm, dev_copy, dom)) < 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) < 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, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
virObjectUnref(qemuCaps);
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
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;
*autostart = vm->autostart;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(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 (!vm->persistent) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot set autostart for transient domain"));
goto cleanup;
}
autostart = (autostart != 0);
if (vm->autostart != autostart) {
if ((configFile = virDomainConfigFile(cfg->configDir, vm->def->name)) == NULL)
goto cleanup;
if ((autostartLink = virDomainConfigFile(cfg->autostartDir, vm->def->name)) == NULL)
goto cleanup;
if (autostart) {
if (virFileMakePath(cfg->autostartDir) < 0) {
virReportSystemError(errno,
_("cannot create autostart directory %s"),
cfg->autostartDir);
goto cleanup;
}
if (symlink(configFile, autostartLink) < 0) {
virReportSystemError(errno,
_("Failed to create symlink '%s to '%s'"),
autostartLink, configFile);
goto cleanup;
}
} else {
if (unlink(autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) {
virReportSystemError(errno,
_("Failed to delete symlink '%s'"),
autostartLink);
goto cleanup;
}
}
vm->autostart = autostart;
}
ret = 0;
cleanup:
VIR_FREE(configFile);
VIR_FREE(autostartLink);
if (vm)
virObjectUnlock(vm);
virObjectUnref(cfg);
return ret;
}
/*
* check whether the host supports CFS bandwidth
*
* Return 1 when CFS bandwidth is supported, 0 when CFS bandwidth is not
* supported, -1 on error.
*/
static int qemuGetCpuBWStatus(virCgroupPtr cgroup)
{
char *cfs_period_path = NULL;
int ret = -1;
if (!cgroup)
return 0;
if (virCgroupPathOfController(cgroup, VIR_CGROUP_CONTROLLER_CPU,
"cpu.cfs_period_us", &cfs_period_path) < 0) {
VIR_INFO("cannot get the path of cgroup CPU controller");
ret = 0;
goto cleanup;
}
if (access(cfs_period_path, F_OK) < 0) {
ret = 0;
} else {
ret = 1;
}
cleanup:
VIR_FREE(cfs_period_path);
return ret;
}
static char *qemuDomainGetSchedulerType(virDomainPtr dom,
int *nparams)
{
virQEMUDriverPtr driver = dom->conn->privateData;
char *ret = NULL;
int rc;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
if (vm == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
priv = vm->privateData;
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (nparams) {
rc = qemuGetCpuBWStatus(priv->cgroup);
if (rc < 0)
goto cleanup;
else if (rc == 0)
*nparams = 1;
else
*nparams = 5;
}
ignore_value(VIR_STRDUP(ret, "posix"));
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
/* deviceWeightStr 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
qemuDomainParseDeviceWeightStr(char *deviceWeightStr,
virBlkioDeviceWeightPtr *dw, size_t *size)
{
char *temp;
int ndevices = 0;
int nsep = 0;
int i;
virBlkioDeviceWeightPtr result = NULL;
*dw = NULL;
*size = 0;
if (STREQ(deviceWeightStr, ""))
return 0;
temp = deviceWeightStr;
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 error;
ndevices = (nsep + 1) / 2;
if (VIR_ALLOC_N(result, ndevices) < 0) {
virReportOOMError();
return -1;
}
i = 0;
temp = deviceWeightStr;
while (temp) {
char *p = temp;
/* device path */
p = strchr(p, ',');
if (!p)
goto error;
if (VIR_STRNDUP(result[i].path, temp, p - temp) < 0)
goto cleanup;
/* weight */
temp = p + 1;
if (virStrToLong_ui(temp, &p, 10, &result[i].weight) < 0)
goto error;
i++;
if (*p == '\0')
break;
else if (*p != ',')
goto error;
temp = p + 1;
}
if (!i)
VIR_FREE(result);
*dw = result;
*size = i;
return 0;
error:
virReportError(VIR_ERR_INVALID_ARG,
_("unable to parse device weight '%s'"), deviceWeightStr);
cleanup:
virBlkioDeviceWeightArrayClear(result, ndevices);
VIR_FREE(result);
return -1;
}
/* Modify dest_array to reflect all device weight changes described in
* src_array. */
static int
qemuDomainMergeDeviceWeights(virBlkioDeviceWeightPtr *dest_array,
size_t *dest_size,
virBlkioDeviceWeightPtr src_array,
size_t src_size)
{
int i, j;
virBlkioDeviceWeightPtr 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;
dest->weight = src->weight;
break;
}
}
if (!found) {
if (!src->weight)
continue;
if (VIR_EXPAND_N(*dest_array, *dest_size, 1) < 0) {
virReportOOMError();
return -1;
}
dest = &(*dest_array)[*dest_size - 1];
dest->path = src->path;
dest->weight = src->weight;
src->path = NULL;
}
}
return 0;
}
static int
qemuDomainSetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParameterArrayValidate(params, nparams,
VIR_DOMAIN_BLKIO_WEIGHT,
VIR_TYPED_PARAM_UINT,
VIR_DOMAIN_BLKIO_DEVICE_WEIGHT,
VIR_TYPED_PARAM_STRING,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
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 cleanup;
}
}
ret = 0;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
for (i = 0; i < nparams; i++) {
int rc;
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_BLKIO_WEIGHT)) {
if (params[i].value.ui > 1000 || params[i].value.ui < 100) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("out of blkio weight range."));
ret = -1;
continue;
}
rc = virCgroupSetBlkioWeight(priv->cgroup, params[i].value.ui);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set blkio weight tunable"));
ret = -1;
}
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
size_t ndevices;
virBlkioDeviceWeightPtr devices = NULL;
int j;
if (qemuDomainParseDeviceWeightStr(params[i].value.s,
&devices,
&ndevices) < 0) {
ret = -1;
continue;
}
for (j = 0; j < ndevices; j++) {
rc = virCgroupSetBlkioDeviceWeight(priv->cgroup,
devices[j].path,
devices[j].weight);
if (rc < 0) {
virReportSystemError(-rc,
_("Unable to set io device weight "
"for path %s"),
devices[j].path);
break;
}
}
if (j != ndevices ||
qemuDomainMergeDeviceWeights(&vm->def->blkio.devices,
&vm->def->blkio.ndevices,
devices, ndevices) < 0)
ret = -1;
virBlkioDeviceWeightArrayClear(devices, ndevices);
VIR_FREE(devices);
}
}
}
if (ret < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Clang can't see that if we get here, persistentDef was set. */
sa_assert(persistentDef);
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_BLKIO_WEIGHT)) {
if (params[i].value.ui > 1000 || params[i].value.ui < 100) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("out of blkio weight range."));
ret = -1;
continue;
}
persistentDef->blkio.weight = params[i].value.ui;
} else if (STREQ(param->field, VIR_DOMAIN_BLKIO_DEVICE_WEIGHT)) {
virBlkioDeviceWeightPtr devices = NULL;
size_t ndevices;
if (qemuDomainParseDeviceWeightStr(params[i].value.s,
&devices,
&ndevices) < 0) {
ret = -1;
continue;
}
if (qemuDomainMergeDeviceWeights(&persistentDef->blkio.devices,
&persistentDef->blkio.ndevices,
devices, ndevices) < 0)
ret = -1;
virBlkioDeviceWeightArrayClear(devices, ndevices);
VIR_FREE(devices);
}
}
if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
ret = -1;
}
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i, j;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
unsigned int val;
int ret = -1;
int rc;
virCapsPtr caps = NULL;
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 (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if ((*nparams) == 0) {
/* Current number of blkio parameters supported by cgroups */
*nparams = QEMU_NB_BLKIO_PARAM;
ret = 0;
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
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 cleanup;
}
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
for (i = 0; i < *nparams && i < QEMU_NB_BLKIO_PARAM; i++) {
virTypedParameterPtr param = &params[i];
val = 0;
switch (i) {
case 0: /* fill blkio weight here */
rc = virCgroupGetBlkioWeight(priv->cgroup, &val);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get blkio weight"));
goto cleanup;
}
if (virTypedParameterAssign(param, VIR_DOMAIN_BLKIO_WEIGHT,
VIR_TYPED_PARAM_UINT, val) < 0)
goto cleanup;
break;
case 1: /* blkiotune.device_weight */
if (vm->def->blkio.ndevices > 0) {
virBuffer buf = VIR_BUFFER_INITIALIZER;
bool comma = false;
for (j = 0; j < vm->def->blkio.ndevices; j++) {
if (!vm->def->blkio.devices[j].weight)
continue;
if (comma)
virBufferAddChar(&buf, ',');
else
comma = true;
virBufferAsprintf(&buf, "%s,%u",
vm->def->blkio.devices[j].path,
vm->def->blkio.devices[j].weight);
}
if (virBufferError(&buf)) {
virReportOOMError();
goto cleanup;
}
param->value.s = virBufferContentAndReset(&buf);
}
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLKIO_DEVICE_WEIGHT,
VIR_TYPED_PARAM_STRING,
param->value.s) < 0)
goto cleanup;
break;
default:
break;
/* should not hit here */
}
}
} else if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
for (i = 0; i < *nparams && i < QEMU_NB_BLKIO_PARAM; i++) {
virTypedParameterPtr param = &params[i];
val = 0;
param->value.ui = 0;
param->type = VIR_TYPED_PARAM_UINT;
switch (i) {
case 0: /* fill blkio weight here */
if (virStrcpyStatic(param->field, VIR_DOMAIN_BLKIO_WEIGHT) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Field name '%s' too long"),
VIR_DOMAIN_BLKIO_WEIGHT);
goto cleanup;
}
param->value.ui = persistentDef->blkio.weight;
break;
case 1: /* blkiotune.device_weight */
if (persistentDef->blkio.ndevices > 0) {
virBuffer buf = VIR_BUFFER_INITIALIZER;
bool comma = false;
for (j = 0; j < persistentDef->blkio.ndevices; j++) {
if (!persistentDef->blkio.devices[j].weight)
continue;
if (comma)
virBufferAddChar(&buf, ',');
else
comma = true;
virBufferAsprintf(&buf, "%s,%u",
persistentDef->blkio.devices[j].path,
persistentDef->blkio.devices[j].weight);
}
if (virBufferError(&buf)) {
virReportOOMError();
goto cleanup;
}
param->value.s = virBufferContentAndReset(&buf);
}
if (!param->value.s && VIR_STRDUP(param->value.s, "") < 0)
goto cleanup;
param->type = VIR_TYPED_PARAM_STRING;
if (virStrcpyStatic(param->field,
VIR_DOMAIN_BLKIO_DEVICE_WEIGHT) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Field name '%s' too long"),
VIR_DOMAIN_BLKIO_DEVICE_WEIGHT);
goto cleanup;
}
break;
default:
break;
/* should not hit here */
}
}
}
if (QEMU_NB_BLKIO_PARAM < *nparams)
*nparams = QEMU_NB_BLKIO_PARAM;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
return ret;
}
static int
qemuDomainSetMemoryParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
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 ret = -1;
int rc;
virCapsPtr caps = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParameterArrayValidate(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 (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_MEMORY)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup memory controller is not mounted"));
goto cleanup;
}
}
#define VIR_GET_LIMIT_PARAMETER(PARAM, VALUE) \
if ((rc = virTypedParamsGetULLong(params, nparams, PARAM, &VALUE)) < 0) \
goto cleanup; \
\
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.
* Note that limit of 0 denotes unlimited */
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 (virCompareLimitUlong(mem_limit, swap_limit) > 0) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("memory hard_limit tunable value must be lower "
"than swap_hard_limit"));
goto cleanup;
}
}
#define QEMU_SET_MEM_PARAMETER(FUNC, VALUE) \
if (set_ ## VALUE) { \
if (flags & VIR_DOMAIN_AFFECT_LIVE) { \
if ((rc = FUNC(priv->cgroup, VALUE)) < 0) { \
virReportSystemError(-rc, _("unable to set memory %s tunable"), \
#VALUE); \
\
goto cleanup; \
} \
vm->def->mem.VALUE = VALUE; \
} \
\
if (flags & VIR_DOMAIN_AFFECT_CONFIG) \
persistentDef->mem.VALUE = VALUE; \
}
/* Soft limit doesn't clash with the others */
QEMU_SET_MEM_PARAMETER(virCgroupSetMemorySoftLimit, soft_limit);
/* set hard limit before swap hard limit if decreasing it */
if (virCompareLimitUlong(vm->def->mem.hard_limit, hard_limit) > 0) {
QEMU_SET_MEM_PARAMETER(virCgroupSetMemoryHardLimit, hard_limit);
/* inhibit changing the limit a second time */
set_hard_limit = false;
}
QEMU_SET_MEM_PARAMETER(virCgroupSetMemSwapHardLimit, swap_hard_limit);
/* otherwise increase it after swap hard limit */
QEMU_SET_MEM_PARAMETER(virCgroupSetMemoryHardLimit, hard_limit);
#undef QEMU_SET_MEM_PARAMETER
if (flags & VIR_DOMAIN_AFFECT_CONFIG &&
virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetMemoryParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
int rc;
virCapsPtr caps = NULL;
qemuDomainObjPrivatePtr priv;
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 (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_MEMORY)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup memory controller is not mounted"));
goto cleanup;
}
}
if ((*nparams) == 0) {
/* Current number of memory parameters supported by cgroups */
*nparams = QEMU_NB_MEM_PARAM;
ret = 0;
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
for (i = 0; i < *nparams && i < QEMU_NB_MEM_PARAM; i++) {
virMemoryParameterPtr param = &params[i];
switch (i) {
case 0: /* fill memory hard limit here */
if (virTypedParameterAssign(param,
VIR_DOMAIN_MEMORY_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG,
persistentDef->mem.hard_limit) < 0)
goto cleanup;
break;
case 1: /* fill memory soft limit here */
if (virTypedParameterAssign(param,
VIR_DOMAIN_MEMORY_SOFT_LIMIT,
VIR_TYPED_PARAM_ULLONG,
persistentDef->mem.soft_limit) < 0)
goto cleanup;
break;
case 2: /* fill swap hard limit here */
if (virTypedParameterAssign(param,
VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG,
persistentDef->mem.swap_hard_limit) < 0)
goto cleanup;
break;
default:
break;
/* should not hit here */
}
}
goto out;
}
for (i = 0; i < *nparams && i < QEMU_NB_MEM_PARAM; i++) {
virTypedParameterPtr param = &params[i];
unsigned long long val = 0;
switch (i) {
case 0: /* fill memory hard limit here */
rc = virCgroupGetMemoryHardLimit(priv->cgroup, &val);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get memory hard limit"));
goto cleanup;
}
if (virTypedParameterAssign(param,
VIR_DOMAIN_MEMORY_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG, val) < 0)
goto cleanup;
break;
case 1: /* fill memory soft limit here */
rc = virCgroupGetMemorySoftLimit(priv->cgroup, &val);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get memory soft limit"));
goto cleanup;
}
if (virTypedParameterAssign(param,
VIR_DOMAIN_MEMORY_SOFT_LIMIT,
VIR_TYPED_PARAM_ULLONG, val) < 0)
goto cleanup;
break;
case 2: /* fill swap hard limit here */
rc = virCgroupGetMemSwapHardLimit(priv->cgroup, &val);
if (rc != 0) {
if (rc != -ENOENT) {
virReportSystemError(-rc, "%s",
_("unable to get swap hard limit"));
goto cleanup;
}
val = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
}
if (virTypedParameterAssign(param,
VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT,
VIR_TYPED_PARAM_ULLONG, val) < 0)
goto cleanup;
break;
default:
break;
/* should not hit here */
}
}
out:
if (QEMU_NB_MEM_PARAM < *nparams)
*nparams = QEMU_NB_MEM_PARAM;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
return ret;
}
static int
qemuDomainSetNumaParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i;
virDomainDefPtr persistentDef = NULL;
virDomainObjPtr vm = NULL;
int ret = -1;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParameterArrayValidate(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 (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup cpuset controller is not mounted"));
goto cleanup;
}
}
ret = 0;
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_NUMA_MODE)) {
if ((flags & VIR_DOMAIN_AFFECT_LIVE) &&
vm->def->numatune.memory.mode != params[i].value.i) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("can't change numa mode for running domain"));
ret = -1;
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
persistentDef->numatune.memory.mode = params[i].value.i;
}
} else if (STREQ(param->field, VIR_DOMAIN_NUMA_NODESET)) {
int rc;
virBitmapPtr nodeset = NULL;
char *nodeset_str = NULL;
if (virBitmapParse(params[i].value.s,
0, &nodeset,
VIR_DOMAIN_CPUMASK_LEN) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to parse nodeset"));
ret = -1;
continue;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (vm->def->numatune.memory.mode !=
VIR_DOMAIN_NUMATUNE_MEM_STRICT) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("change of nodeset for running domain "
"requires strict numa mode"));
virBitmapFree(nodeset);
ret = -1;
continue;
}
/* Ensure the cpuset string is formated before passing to cgroup */
if (!(nodeset_str = virBitmapFormat(nodeset))) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to format nodeset"));
virBitmapFree(nodeset);
ret = -1;
continue;
}
if ((rc = virCgroupSetCpusetMems(priv->cgroup, nodeset_str)) != 0) {
virReportSystemError(-rc, "%s",
_("unable to set numa tunable"));
virBitmapFree(nodeset);
VIR_FREE(nodeset_str);
ret = -1;
continue;
}
VIR_FREE(nodeset_str);
/* update vm->def here so that dumpxml can read the new
* values from vm->def. */
virBitmapFree(vm->def->numatune.memory.nodemask);
vm->def->numatune.memory.placement_mode =
VIR_NUMA_TUNE_MEM_PLACEMENT_MODE_STATIC;
vm->def->numatune.memory.nodemask = virBitmapNewCopy(nodeset);
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
virBitmapFree(persistentDef->numatune.memory.nodemask);
persistentDef->numatune.memory.nodemask = nodeset;
persistentDef->numatune.memory.placement_mode =
VIR_NUMA_TUNE_MEM_PLACEMENT_MODE_STATIC;
nodeset = NULL;
}
virBitmapFree(nodeset);
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (!persistentDef->numatune.memory.placement_mode)
persistentDef->numatune.memory.placement_mode =
VIR_NUMA_TUNE_MEM_PLACEMENT_MODE_AUTO;
if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
ret = -1;
}
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetNumaParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
char *nodeset = NULL;
int ret = -1;
int rc;
virCapsPtr caps = NULL;
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 (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if ((*nparams) == 0) {
*nparams = QEMU_NB_NUMA_PARAM;
ret = 0;
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_MEMORY)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup memory controller is not mounted"));
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 */
if (virTypedParameterAssign(param, VIR_DOMAIN_NUMA_MODE,
VIR_TYPED_PARAM_INT, 0) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
param->value.i = persistentDef->numatune.memory.mode;
else
param->value.i = vm->def->numatune.memory.mode;
break;
case 1: /* fill numa nodeset here */
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
nodeset = virBitmapFormat(persistentDef->numatune.memory.nodemask);
if (!nodeset && VIR_STRDUP(nodeset, "") < 0)
goto cleanup;
} else {
rc = virCgroupGetCpusetMems(priv->cgroup, &nodeset);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get numa nodeset"));
goto cleanup;
}
}
if (virTypedParameterAssign(param, VIR_DOMAIN_NUMA_NODESET,
VIR_TYPED_PARAM_STRING, nodeset) < 0)
goto cleanup;
nodeset = NULL;
break;
default:
break;
/* should not hit here */
}
}
if (*nparams > QEMU_NB_NUMA_PARAM)
*nparams = QEMU_NB_NUMA_PARAM;
ret = 0;
cleanup:
VIR_FREE(nodeset);
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
return ret;
}
static int
qemuSetVcpusBWLive(virDomainObjPtr vm, virCgroupPtr cgroup,
unsigned long long period, long long quota)
{
int i;
qemuDomainObjPrivatePtr priv = vm->privateData;
virCgroupPtr cgroup_vcpu = NULL;
int rc;
if (period == 0 && quota == 0)
return 0;
/* If we does not know VCPU<->PID mapping or all vcpu runs in the same
* thread, we cannot control each vcpu. So we only modify cpu bandwidth
* when each vcpu has a separated thread.
*/
if (priv->nvcpupids != 0 && priv->vcpupids[0] != vm->pid) {
for (i = 0; i < priv->nvcpupids; i++) {
rc = virCgroupNewVcpu(cgroup, i, false, &cgroup_vcpu);
if (rc < 0) {
virReportSystemError(-rc,
_("Unable to find vcpu cgroup for %s(vcpu:"
" %d)"),
vm->def->name, i);
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(virDomainObjPtr vm, virCgroupPtr cgroup,
unsigned long long period, long long quota)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virCgroupPtr cgroup_emulator = NULL;
int rc;
if (period == 0 && quota == 0)
return 0;
if (priv->nvcpupids == 0 || priv->vcpupids[0] == vm->pid) {
return 0;
}
rc = virCgroupNewEmulator(cgroup, false, &cgroup_emulator);
if (rc < 0) {
virReportSystemError(-rc,
_("Unable to find emulator cgroup for %s"),
vm->def->name);
goto cleanup;
}
if (qemuSetupCgroupVcpuBW(cgroup_emulator, period, quota) < 0)
goto cleanup;
virCgroupFree(&cgroup_emulator);
return 0;
cleanup:
virCgroupFree(&cgroup_emulator);
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 cleanup; \
}
static int
qemuDomainSetSchedulerParametersFlags(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i;
virDomainObjPtr vm = NULL;
virDomainDefPtr vmdef = NULL;
unsigned long long value_ul;
long long value_l;
int ret = -1;
int rc;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParameterArrayValidate(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_EMULATOR_PERIOD,
VIR_TYPED_PARAM_ULLONG,
VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA,
VIR_TYPED_PARAM_LLONG,
NULL) < 0)
return -1;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&vmdef) < 0)
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 (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
}
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 (flags & VIR_DOMAIN_AFFECT_LIVE) {
if ((rc = virCgroupSetCpuShares(priv->cgroup, value_ul))) {
virReportSystemError(-rc, "%s",
_("unable to set cpu shares tunable"));
goto cleanup;
}
vm->def->cputune.shares = value_ul;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
vmdef->cputune.shares = value_ul;
} 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 (flags & VIR_DOMAIN_AFFECT_LIVE && value_ul) {
if ((rc = qemuSetVcpusBWLive(vm, priv->cgroup, value_ul, 0)))
goto cleanup;
vm->def->cputune.period = value_ul;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
vmdef->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 (flags & VIR_DOMAIN_AFFECT_LIVE && value_l) {
if ((rc = qemuSetVcpusBWLive(vm, priv->cgroup, 0, value_l)))
goto cleanup;
vm->def->cputune.quota = value_l;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
vmdef->cputune.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 (flags & VIR_DOMAIN_AFFECT_LIVE && value_ul) {
if ((rc = qemuSetEmulatorBandwidthLive(vm, priv->cgroup,
value_ul, 0)))
goto cleanup;
vm->def->cputune.emulator_period = value_ul;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
vmdef->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 (flags & VIR_DOMAIN_AFFECT_LIVE && value_l) {
if ((rc = qemuSetEmulatorBandwidthLive(vm, priv->cgroup,
0, value_l)))
goto cleanup;
vm->def->cputune.emulator_quota = value_l;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
vmdef->cputune.emulator_quota = value_l;
}
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
rc = virDomainSaveConfig(cfg->configDir, vmdef);
if (rc < 0)
goto cleanup;
virDomainObjAssignDef(vm, vmdef, false, NULL);
vmdef = NULL;
}
ret = 0;
cleanup:
virDomainDefFree(vmdef);
if (vm)
virObjectUnlock(vm);
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)
{
int rc;
rc = virCgroupGetCpuCfsPeriod(cgroup, period);
if (rc < 0) {
virReportSystemError(-rc, "%s",
_("unable to get cpu bandwidth period tunable"));
return -1;
}
rc = virCgroupGetCpuCfsQuota(cgroup, quota);
if (rc < 0) {
virReportSystemError(-rc, "%s",
_("unable to get cpu bandwidth tunable"));
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 (priv->nvcpupids == 0 || priv->vcpupids[0] == vm->pid) {
/* We do not create sub dir for each vcpu */
rc = qemuGetVcpuBWLive(priv->cgroup, period, quota);
if (rc < 0)
goto cleanup;
if (*quota > 0)
*quota /= vm->def->vcpus;
goto out;
}
/* get period and quota for vcpu0 */
rc = virCgroupNewVcpu(priv->cgroup, 0, false, &cgroup_vcpu);
if (!cgroup_vcpu) {
virReportSystemError(-rc,
_("Unable to find vcpu cgroup for %s(vcpu: 0)"),
vm->def->name);
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(virDomainObjPtr vm, virCgroupPtr cgroup,
unsigned long long *period, long long *quota)
{
virCgroupPtr cgroup_emulator = NULL;
qemuDomainObjPrivatePtr priv = NULL;
int rc;
int ret = -1;
priv = vm->privateData;
if (priv->nvcpupids == 0 || priv->vcpupids[0] == vm->pid) {
/* We don't create sub dir for each vcpu */
*period = 0;
*quota = 0;
return 0;
}
/* get period and quota for emulator */
rc = virCgroupNewEmulator(cgroup, false, &cgroup_emulator);
if (!cgroup_emulator) {
virReportSystemError(-rc,
_("Unable to find emulator cgroup for %s"),
vm->def->name);
goto cleanup;
}
rc = qemuGetVcpuBWLive(cgroup_emulator, period, quota);
if (rc < 0)
goto cleanup;
ret = 0;
cleanup:
virCgroupFree(&cgroup_emulator);
return ret;
}
static int
qemuDomainGetSchedulerParametersFlags(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
unsigned long long shares;
unsigned long long period;
long long quota;
unsigned long long emulator_period;
long long emulator_quota;
int ret = -1;
int rc;
bool cpu_bw_status = false;
int saved_nparams = 0;
virDomainDefPtr persistentDef;
virCapsPtr caps = NULL;
qemuDomainObjPrivatePtr priv;
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)))
goto cleanup;
priv = vm->privateData;
if (*nparams > 1) {
rc = qemuGetCpuBWStatus(priv->cgroup);
if (rc < 0)
goto cleanup;
cpu_bw_status = !!rc;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
shares = persistentDef->cputune.shares;
if (*nparams > 1 && cpu_bw_status) {
period = persistentDef->cputune.period;
quota = persistentDef->cputune.quota;
emulator_period = persistentDef->cputune.emulator_period;
emulator_quota = persistentDef->cputune.emulator_quota;
}
goto out;
}
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
rc = virCgroupGetCpuShares(priv->cgroup, &shares);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get cpu shares tunable"));
goto cleanup;
}
if (*nparams > 1 && cpu_bw_status) {
rc = qemuGetVcpusBWLive(vm, &period, &quota);
if (rc != 0)
goto cleanup;
}
if (*nparams > 3 && cpu_bw_status) {
rc = qemuGetEmulatorBandwidthLive(vm, priv->cgroup, &emulator_period,
&emulator_quota);
if (rc != 0)
goto cleanup;
}
out:
if (virTypedParameterAssign(&params[0], VIR_DOMAIN_SCHEDULER_CPU_SHARES,
VIR_TYPED_PARAM_ULLONG, shares) < 0)
goto cleanup;
saved_nparams++;
if (cpu_bw_status) {
if (*nparams > saved_nparams) {
if (virTypedParameterAssign(&params[1],
VIR_DOMAIN_SCHEDULER_VCPU_PERIOD,
VIR_TYPED_PARAM_ULLONG, period) < 0)
goto cleanup;
saved_nparams++;
}
if (*nparams > saved_nparams) {
if (virTypedParameterAssign(&params[2],
VIR_DOMAIN_SCHEDULER_VCPU_QUOTA,
VIR_TYPED_PARAM_LLONG, quota) < 0)
goto cleanup;
saved_nparams++;
}
if (*nparams > saved_nparams) {
if (virTypedParameterAssign(&params[3],
VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD,
VIR_TYPED_PARAM_ULLONG,
emulator_period) < 0)
goto cleanup;
saved_nparams++;
}
if (*nparams > saved_nparams) {
if (virTypedParameterAssign(&params[4],
VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA,
VIR_TYPED_PARAM_LLONG,
emulator_quota) < 0)
goto cleanup;
saved_nparams++;
}
}
*nparams = saved_nparams;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
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, i;
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 (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 ((i = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto endjob;
}
disk = vm->def->disks[i];
if (virAsprintf(&device, "%s%s", QEMU_DRIVE_HOST_PREFIX,
disk->info.alias) < 0) {
virReportOOMError();
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
if (qemuMonitorBlockResize(priv->mon, device, size) < 0) {
qemuDomainObjExitMonitor(driver, vm);
goto endjob;
}
qemuDomainObjExitMonitor(driver, vm);
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
VIR_FREE(device);
if (vm)
virObjectUnlock(vm);
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,
struct _virDomainBlockStats *stats)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i, ret = -1;
virDomainObjPtr vm;
virDomainDiskDefPtr disk = NULL;
qemuDomainObjPrivatePtr priv;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if ((i = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto cleanup;
}
disk = vm->def->disks[i];
if (!disk->info.alias) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("missing disk device alias name for %s"), disk->dst);
goto cleanup;
}
priv = vm->privateData;
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;
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetBlockStatsInfo(priv->mon,
disk->info.alias,
&stats->rd_req,
&stats->rd_bytes,
NULL,
&stats->wr_req,
&stats->wr_bytes,
NULL,
NULL,
NULL,
&stats->errs);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainBlockStatsFlags(virDomainPtr dom,
const char *path,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i, tmp, ret = -1;
virDomainObjPtr vm;
virDomainDiskDefPtr disk = NULL;
qemuDomainObjPrivatePtr priv;
long long rd_req, rd_bytes, wr_req, wr_bytes, rd_total_times;
long long wr_total_times, flush_req, flush_total_times, errs;
virTypedParameterPtr param;
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 (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 (*nparams != 0) {
if ((i = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto endjob;
}
disk = vm->def->disks[i];
if (!disk->info.alias) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("missing disk device alias name for %s"),
disk->dst);
goto endjob;
}
}
priv = vm->privateData;
VIR_DEBUG("priv=%p, params=%p, flags=%x", priv, params, flags);
qemuDomainObjEnterMonitor(driver, vm);
tmp = *nparams;
ret = qemuMonitorGetBlockStatsParamsNumber(priv->mon, nparams);
if (tmp == 0 || ret < 0) {
qemuDomainObjExitMonitor(driver, vm);
goto endjob;
}
ret = qemuMonitorGetBlockStatsInfo(priv->mon,
disk->info.alias,
&rd_req,
&rd_bytes,
&rd_total_times,
&wr_req,
&wr_bytes,
&wr_total_times,
&flush_req,
&flush_total_times,
&errs);
qemuDomainObjExitMonitor(driver, vm);
if (ret < 0)
goto endjob;
tmp = 0;
ret = -1;
if (tmp < *nparams && wr_bytes != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_WRITE_BYTES,
VIR_TYPED_PARAM_LLONG, wr_bytes) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && wr_req != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_WRITE_REQ,
VIR_TYPED_PARAM_LLONG, wr_req) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && rd_bytes != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_READ_BYTES,
VIR_TYPED_PARAM_LLONG, rd_bytes) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && rd_req != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_READ_REQ,
VIR_TYPED_PARAM_LLONG, rd_req) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && flush_req != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param, VIR_DOMAIN_BLOCK_STATS_FLUSH_REQ,
VIR_TYPED_PARAM_LLONG, flush_req) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && wr_total_times != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_STATS_WRITE_TOTAL_TIMES,
VIR_TYPED_PARAM_LLONG, wr_total_times) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && rd_total_times != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_STATS_READ_TOTAL_TIMES,
VIR_TYPED_PARAM_LLONG, rd_total_times) < 0)
goto endjob;
tmp++;
}
if (tmp < *nparams && flush_total_times != -1) {
param = &params[tmp];
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_STATS_FLUSH_TOTAL_TIMES,
VIR_TYPED_PARAM_LLONG,
flush_total_times) < 0)
goto endjob;
tmp++;
}
/* Field 'errs' is meaningless for QEMU, won't set it. */
ret = 0;
*nparams = tmp;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
#ifdef __linux__
static int
qemuDomainInterfaceStats(virDomainPtr dom,
const char *path,
struct _virDomainInterfaceStats *stats)
{
virDomainObjPtr vm;
int i;
int ret = -1;
if (!(vm = qemuDomObjFromDomain(dom)))
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 (vm->def->nets[i]->ifname &&
STREQ(vm->def->nets[i]->ifname, path)) {
ret = 0;
break;
}
}
if (ret == 0)
ret = linuxDomainInterfaceStats(path, stats);
else
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path, '%s' is not a known interface"), path);
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
#else
static int
qemuDomainInterfaceStats(virDomainPtr dom ATTRIBUTE_UNUSED,
const char *path ATTRIBUTE_UNUSED,
struct _virDomainInterfaceStats *stats ATTRIBUTE_UNUSED)
{
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("interface stats not implemented on this platform"));
return -1;
}
#endif
static int
qemuDomainSetInterfaceParameters(virDomainPtr dom,
const char *device,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
virDomainNetDefPtr net = NULL, persistentNet = NULL;
virNetDevBandwidthPtr bandwidth = NULL, newBandwidth = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParameterArrayValidate(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_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 (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
net = virDomainNetFind(vm->def, device);
if (!net) {
virReportError(VIR_ERR_INVALID_ARG,
_("Can't find device %s"), device);
goto cleanup;
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
persistentNet = virDomainNetFind(persistentDef, device);
if (!persistentNet) {
virReportError(VIR_ERR_INVALID_ARG,
_("Can't find device %s"), device);
goto cleanup;
}
}
if ((VIR_ALLOC(bandwidth) < 0) ||
(VIR_ALLOC(bandwidth->in) < 0) ||
(VIR_ALLOC(bandwidth->out) < 0)) {
virReportOOMError();
goto cleanup;
}
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;
} 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_OUT_AVERAGE)) {
bandwidth->out->average = params[i].value.ui;
} 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 is mandatory, peak and burst are optional. So if no
* average is given, we free inbound/outbound here which causes
* inbound/outbound to not be set. */
if (!bandwidth->in->average) {
VIR_FREE(bandwidth->in);
}
if (!bandwidth->out->average) {
VIR_FREE(bandwidth->out);
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (VIR_ALLOC(newBandwidth) < 0) {
virReportOOMError();
goto cleanup;
}
/* 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 ||
(net->bandwidth && net->bandwidth->in)) {
if (VIR_ALLOC(newBandwidth->in) < 0) {
virReportOOMError();
goto cleanup;
}
memcpy(newBandwidth->in,
bandwidth->in ? bandwidth->in : net->bandwidth->in,
sizeof(*newBandwidth->in));
}
if (bandwidth->out ||
(net->bandwidth && net->bandwidth->out)) {
if (VIR_ALLOC(newBandwidth->out) < 0) {
virReportOOMError();
goto cleanup;
}
memcpy(newBandwidth->out,
bandwidth->out ? bandwidth->out : net->bandwidth->out,
sizeof(*newBandwidth->out));
}
if (virNetDevBandwidthSet(net->ifname, newBandwidth, false) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot set bandwidth limits on %s"),
device);
goto cleanup;
}
virNetDevBandwidthFree(net->bandwidth);
net->bandwidth = newBandwidth;
newBandwidth = NULL;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
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;
}
if (bandwidth->out) {
VIR_FREE(persistentNet->bandwidth->out);
persistentNet->bandwidth->out = bandwidth->out;
bandwidth->out = NULL;
}
}
if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
goto cleanup;
}
ret = 0;
cleanup:
virNetDevBandwidthFree(bandwidth);
virNetDevBandwidthFree(newBandwidth);
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetInterfaceParameters(virDomainPtr dom,
const char *device,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int i;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
virDomainNetDefPtr net = NULL;
int ret = -1;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if ((*nparams) == 0) {
*nparams = QEMU_NB_BANDWIDTH_PARAM;
ret = 0;
goto cleanup;
}
def = persistentDef;
if (!def)
def = vm->def;
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: /* 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 4: /* 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 5: /* 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;
default:
break;
/* should not hit here */
}
}
if (*nparams > QEMU_NB_BANDWIDTH_PARAM)
*nparams = QEMU_NB_BANDWIDTH_PARAM;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
return ret;
}
static int
qemuDomainMemoryStats(virDomainPtr dom,
struct _virDomainMemoryStat *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 (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
} else {
qemuDomainObjPrivatePtr priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetMemoryStats(priv->mon, stats, nr_stats);
qemuDomainObjExitMonitor(driver, vm);
if (ret >= 0 && ret < nr_stats) {
long rss;
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++;
}
}
}
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainBlockPeek(virDomainPtr dom,
const char *path,
unsigned long long offset, size_t size,
void *buffer,
unsigned int flags)
{
virDomainObjPtr vm;
int fd = -1, ret = -1;
const char *actual;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!path || path[0] == '\0') {
virReportError(VIR_ERR_INVALID_ARG,
"%s", _("NULL or empty path"));
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;
/* The path is correct, now try to open it and get its size. */
fd = open(path, O_RDONLY);
if (fd == -1) {
virReportSystemError(errno,
_("%s: failed to open"), path);
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);
if (vm)
virObjectUnlock(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 (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) {
virReportOOMError();
goto endjob;
}
/* Create a temporary filename. */
if ((fd = mkostemp(tmp, O_CLOEXEC)) == -1) {
virReportSystemError(errno,
_("mkostemp(\"%s\") failed"), tmp);
goto endjob;
}
virSecurityManagerSetSavedStateLabel(qemu_driver->securityManager, vm->def, tmp);
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
if (flags == VIR_MEMORY_VIRTUAL) {
if (qemuMonitorSaveVirtualMemory(priv->mon, offset, size, tmp) < 0) {
qemuDomainObjExitMonitor(driver, vm);
goto endjob;
}
} else {
if (qemuMonitorSavePhysicalMemory(priv->mon, offset, size, tmp) < 0) {
qemuDomainObjExitMonitor(driver, vm);
goto endjob;
}
}
qemuDomainObjExitMonitor(driver, vm);
/* 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:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
VIR_FORCE_CLOSE(fd);
if (tmp)
unlink(tmp);
VIR_FREE(tmp);
if (vm)
virObjectUnlock(vm);
virObjectUnref(cfg);
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;
int fd = -1;
off_t end;
virStorageFileMetadata *meta = NULL;
virDomainDiskDefPtr disk = NULL;
struct stat sb;
int i;
int format;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
if (!path || path[0] == '\0') {
virReportError(VIR_ERR_INVALID_ARG,
"%s", _("NULL or empty path"));
goto cleanup;
}
/* Check the path belongs to this domain. */
if ((i = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid path %s not assigned to domain"), path);
goto cleanup;
}
disk = vm->def->disks[i];
if (!disk->src) {
virReportError(VIR_ERR_INVALID_ARG,
_("disk %s does not currently have a source assigned"),
path);
goto cleanup;
}
path = disk->src;
/* The path is correct, now try to open it and get its size. */
fd = open(path, O_RDONLY);
if (fd == -1) {
virReportSystemError(errno,
_("failed to open path '%s'"), path);
goto cleanup;
}
/* Probe for magic formats */
if (disk->format) {
format = disk->format;
} else {
if (cfg->allowDiskFormatProbing) {
if ((format = virStorageFileProbeFormat(disk->src,
cfg->user,
cfg->group)) < 0)
goto cleanup;
} else {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("no disk format for %s and probing is disabled"),
disk->src);
goto cleanup;
}
}
if (!(meta = virStorageFileGetMetadataFromFD(path, fd, format)))
goto cleanup;
/* Get info for normal formats */
if (fstat(fd, &sb) < 0) {
virReportSystemError(errno,
_("cannot stat file '%s'"), path);
goto cleanup;
}
if (S_ISREG(sb.st_mode)) {
#ifndef WIN32
info->physical = (unsigned long long)sb.st_blocks *
(unsigned long long)DEV_BSIZE;
#else
info->physical = sb.st_size;
#endif
/* Regular files may be sparse, so logical size (capacity) is not same
* as actual physical above
*/
info->capacity = sb.st_size;
} else {
/* NB. Because we configure with AC_SYS_LARGEFILE, off_t should
* be 64 bits on all platforms.
*/
end = lseek(fd, 0, SEEK_END);
if (end == (off_t)-1) {
virReportSystemError(errno,
_("failed to seek to end of %s"), path);
goto cleanup;
}
info->physical = end;
info->capacity = end;
}
/* If the file we probed has a capacity set, then override
* what we calculated from file/block extents */
if (meta->capacity)
info->capacity = meta->capacity;
/* Set default value .. */
info->allocation = info->physical;
/* ..but if guest is running & not using raw
disk format and on a block device, then query
highest allocated extent from QEMU */
if (disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK &&
format != VIR_STORAGE_FILE_RAW &&
S_ISBLK(sb.st_mode) &&
virDomainObjIsActive(vm)) {
qemuDomainObjPrivatePtr priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetBlockExtent(priv->mon,
disk->info.alias,
&info->allocation);
qemuDomainObjExitMonitor(driver, vm);
} else {
ret = 0;
}
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
} else {
ret = 0;
}
cleanup:
virStorageFileFreeMetadata(meta);
VIR_FORCE_CLOSE(fd);
if (vm)
virObjectUnlock(vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuConnectDomainEventRegister(virConnectPtr conn,
virConnectDomainEventCallback callback,
void *opaque,
virFreeCallback freecb)
{
virQEMUDriverPtr driver = conn->privateData;
int ret;
ret = virDomainEventStateRegister(conn,
driver->domainEventState,
callback, opaque, freecb);
return ret;
}
static int
qemuConnectDomainEventDeregister(virConnectPtr conn,
virConnectDomainEventCallback callback)
{
virQEMUDriverPtr driver = conn->privateData;
int ret;
ret = virDomainEventStateDeregister(conn,
driver->domainEventState,
callback);
return ret;
}
static int
qemuConnectDomainEventRegisterAny(virConnectPtr conn,
virDomainPtr dom,
int eventID,
virConnectDomainEventGenericCallback callback,
void *opaque,
virFreeCallback freecb)
{
virQEMUDriverPtr driver = conn->privateData;
int ret;
if (virDomainEventStateRegisterID(conn,
driver->domainEventState,
dom, eventID,
callback, opaque, freecb, &ret) < 0)
ret = -1;
return ret;
}
static int
qemuConnectDomainEventDeregisterAny(virConnectPtr conn,
int callbackID)
{
virQEMUDriverPtr driver = conn->privateData;
int ret;
ret = virDomainEventStateDeregisterID(conn,
driver->domainEventState,
callbackID);
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;
virCapsPtr caps = NULL;
virDomainDefPtr def = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!dom_xml) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no domain XML passed"));
goto cleanup;
}
if (!(flags & VIR_MIGRATE_TUNNELLED)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("PrepareTunnel called but no TUNNELLED flag set"));
goto cleanup;
}
if (st == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("tunnelled migration requested but NULL stream passed"));
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 (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(dom_xml, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (dname) {
VIR_FREE(def->name);
if (VIR_STRDUP(def->name, dname) < 0)
goto cleanup;
}
ret = qemuMigrationPrepareTunnel(driver, dconn,
NULL, 0, NULL, NULL, /* No cookies in v2 */
st, def, flags);
def = NULL;
cleanup:
virDomainDefFree(def);
virObjectUnref(caps);
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;
virCapsPtr caps = NULL;
virDomainDefPtr def = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
*uri_out = NULL;
if (virLockManagerPluginUsesState(driver->lockManager)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot use migrate v2 protocol with lock manager %s"),
virLockManagerPluginGetName(driver->lockManager));
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 (!dom_xml) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no domain XML passed"));
goto cleanup;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(dom_xml, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (dname) {
VIR_FREE(def->name);
if (VIR_STRDUP(def->name, dname) < 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, flags);
def = NULL;
cleanup:
virDomainDefFree(def);
virObjectUnref(caps);
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;
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 (!(vm = qemuDomObjFromDomain(dom)))
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, dconnuri, uri, cookie, cookielen,
NULL, NULL, /* No output cookies in v2 */
flags, dname, resource, false);
cleanup:
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);
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)
{
virQEMUDriverPtr driver = domain->conn->privateData;
virDomainObjPtr vm;
char *xml = NULL;
enum qemuDomainAsyncJob asyncJob;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
if (!(vm = qemuDomObjFromDomain(domain)))
return NULL;
if ((flags & VIR_MIGRATE_CHANGE_PROTECTION)) {
if (qemuMigrationJobStart(driver, vm, QEMU_ASYNC_JOB_MIGRATION_OUT) < 0)
goto cleanup;
asyncJob = QEMU_ASYNC_JOB_MIGRATION_OUT;
} else {
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
asyncJob = QEMU_ASYNC_JOB_NONE;
}
if (!virDomainObjIsActive(vm) && !(flags & VIR_MIGRATE_OFFLINE)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
/* Check if there is any ejected media.
* We don't want to require them on the destination.
*/
if (!(flags & VIR_MIGRATE_OFFLINE) &&
qemuDomainCheckEjectableMedia(driver, vm, asyncJob) < 0)
goto endjob;
if (!(xml = qemuMigrationBegin(driver, vm, xmlin, dname,
cookieout, cookieoutlen,
flags)))
goto endjob;
if ((flags & VIR_MIGRATE_CHANGE_PROTECTION)) {
/* We keep the job active across API calls until the confirm() call.
* This prevents any other APIs being invoked while migration is taking
* place.
*/
if (virQEMUCloseCallbacksSet(driver->closeCallbacks, vm, domain->conn,
qemuMigrationCleanup) < 0)
goto endjob;
if (qemuMigrationJobContinue(vm) == 0) {
vm = NULL;
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("domain disappeared"));
VIR_FREE(xml);
if (cookieout)
VIR_FREE(*cookieout);
}
} else {
goto endjob;
}
cleanup:
if (vm)
virObjectUnlock(vm);
return xml;
endjob:
if ((flags & VIR_MIGRATE_CHANGE_PROTECTION)) {
if (qemuMigrationJobFinish(driver, vm) == 0)
vm = NULL;
} else {
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
}
goto cleanup;
}
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;
virCapsPtr caps = NULL;
virDomainDefPtr def = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
*uri_out = NULL;
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 (!dom_xml) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no domain XML passed"));
goto cleanup;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(dom_xml, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (dname) {
VIR_FREE(def->name);
if (VIR_STRDUP(def->name, dname) < 0)
goto cleanup;
}
ret = qemuMigrationPrepareDirect(driver, dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
uri_in, uri_out,
def, flags);
def = NULL;
cleanup:
virDomainDefFree(def);
virObjectUnref(caps);
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;
virCapsPtr caps = NULL;
virDomainDefPtr def = NULL;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!dom_xml) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no domain XML passed"));
goto cleanup;
}
if (!(flags & VIR_MIGRATE_TUNNELLED)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("PrepareTunnel called but no TUNNELLED flag set"));
goto cleanup;
}
if (st == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("tunnelled migration requested but NULL stream passed"));
goto cleanup;
}
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(def = virDomainDefParseString(dom_xml, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (dname) {
VIR_FREE(def->name);
if (VIR_STRDUP(def->name, dname) < 0)
goto cleanup;
}
ret = qemuMigrationPrepareTunnel(driver, dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
st, def, flags);
def = NULL;
cleanup:
virDomainDefFree(def);
virObjectUnref(caps);
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;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
return qemuMigrationPerform(driver, dom->conn, vm, xmlin,
dconnuri, uri, cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, dname, resource, true);
}
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;
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);
goto cleanup;
}
dom = qemuMigrationFinish(driver, dconn, vm,
cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, cancelled, true);
cleanup:
return dom;
}
static int
qemuDomainMigrateConfirm3(virDomainPtr domain,
const char *cookiein,
int cookieinlen,
unsigned long flags,
int cancelled)
{
virQEMUDriverPtr driver = domain->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
enum qemuMigrationJobPhase phase;
virQEMUDriverConfigPtr cfg = NULL;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (!qemuMigrationJobIsActive(vm, QEMU_ASYNC_JOB_MIGRATION_OUT))
goto cleanup;
if (cancelled)
phase = QEMU_MIGRATION_PHASE_CONFIRM3_CANCELLED;
else
phase = QEMU_MIGRATION_PHASE_CONFIRM3;
qemuMigrationJobStartPhase(driver, vm, phase);
virQEMUCloseCallbacksUnset(driver->closeCallbacks, vm,
qemuMigrationCleanup);
ret = qemuMigrationConfirm(driver, domain->conn, vm,
cookiein, cookieinlen,
flags, cancelled);
if (qemuMigrationJobFinish(driver, vm) == 0) {
vm = NULL;
} else if (!virDomainObjIsActive(vm) &&
(!vm->persistent || (flags & VIR_MIGRATE_UNDEFINE_SOURCE))) {
if (flags & VIR_MIGRATE_UNDEFINE_SOURCE)
virDomainDeleteConfig(cfg->configDir, cfg->autostartDir, vm);
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
}
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuNodeDeviceGetPciInfo(virNodeDevicePtr dev,
unsigned *domain,
unsigned *bus,
unsigned *slot,
unsigned *function)
{
virNodeDeviceDefPtr def = NULL;
virNodeDevCapsDefPtr cap;
char *xml = NULL;
int ret = -1;
xml = virNodeDeviceGetXMLDesc(dev, 0);
if (!xml)
goto out;
def = virNodeDeviceDefParseString(xml, EXISTING_DEVICE, NULL);
if (!def)
goto out;
cap = def->caps;
while (cap) {
if (cap->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"), dev->name);
goto out;
}
ret = 0;
out:
virNodeDeviceDefFree(def);
VIR_FREE(xml);
return ret;
}
static int
qemuNodeDeviceDetachFlags(virNodeDevicePtr dev,
const char *driverName,
unsigned int flags)
{
virQEMUDriverPtr driver = dev->conn->privateData;
virPCIDevicePtr pci;
unsigned domain, bus, slot, function;
int ret = -1;
bool in_inactive_list = false;
virCheckFlags(0, -1);
if (qemuNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0)
return -1;
pci = virPCIDeviceNew(domain, bus, slot, function);
if (!pci)
return -1;
if (!driverName || STREQ(driverName, "kvm")) {
virPCIDeviceSetStubDriver(pci, "pci-stub");
} else if (STREQ(driverName, "vfio")) {
virPCIDeviceSetStubDriver(pci, "vfio-pci");
} else {
virReportError(VIR_ERR_INVALID_ARG,
_("unknown driver name '%s'"), driverName);
goto out;
}
virObjectLock(driver->activePciHostdevs);
virObjectLock(driver->inactivePciHostdevs);
in_inactive_list = virPCIDeviceListFind(driver->inactivePciHostdevs, pci);
if (virPCIDeviceDetach(pci, driver->activePciHostdevs,
driver->inactivePciHostdevs, NULL) < 0)
goto out;
ret = 0;
out:
virObjectUnlock(driver->inactivePciHostdevs);
virObjectUnlock(driver->activePciHostdevs);
if (in_inactive_list)
virPCIDeviceFree(pci);
return ret;
}
static int
qemuNodeDeviceDettach(virNodeDevicePtr dev)
{
return qemuNodeDeviceDetachFlags(dev, NULL, 0);
}
static int
qemuNodeDeviceReAttach(virNodeDevicePtr dev)
{
virQEMUDriverPtr driver = dev->conn->privateData;
virPCIDevicePtr pci;
virPCIDevicePtr other;
unsigned domain, bus, slot, function;
int ret = -1;
if (qemuNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0)
return -1;
pci = virPCIDeviceNew(domain, bus, slot, function);
if (!pci)
return -1;
virObjectLock(driver->activePciHostdevs);
virObjectLock(driver->inactivePciHostdevs);
other = virPCIDeviceListFind(driver->activePciHostdevs, pci);
if (other) {
const char *other_name = virPCIDeviceGetUsedBy(other);
if (other_name)
virReportError(VIR_ERR_OPERATION_INVALID,
_("PCI device %s is still in use by domain %s"),
virPCIDeviceGetName(pci), other_name);
else
virReportError(VIR_ERR_OPERATION_INVALID,
_("PCI device %s is still in use"),
virPCIDeviceGetName(pci));
goto out;
}
virPCIDeviceReattachInit(pci);
if (virPCIDeviceReattach(pci, driver->activePciHostdevs,
driver->inactivePciHostdevs) < 0)
goto out;
ret = 0;
out:
virObjectUnlock(driver->inactivePciHostdevs);
virObjectUnlock(driver->activePciHostdevs);
virPCIDeviceFree(pci);
return ret;
}
static int
qemuNodeDeviceReset(virNodeDevicePtr dev)
{
virQEMUDriverPtr driver = dev->conn->privateData;
virPCIDevicePtr pci;
unsigned domain, bus, slot, function;
int ret = -1;
if (qemuNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0)
return -1;
pci = virPCIDeviceNew(domain, bus, slot, function);
if (!pci)
return -1;
virObjectLock(driver->activePciHostdevs);
virObjectLock(driver->inactivePciHostdevs);
if (virPCIDeviceReset(pci, driver->activePciHostdevs,
driver->inactivePciHostdevs) < 0)
goto out;
ret = 0;
out:
virObjectUnlock(driver->inactivePciHostdevs);
virObjectUnlock(driver->activePciHostdevs);
virPCIDeviceFree(pci);
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;
virCheckFlags(0, VIR_CPU_COMPARE_ERROR);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!caps->host.cpu ||
!caps->host.cpu->model) {
VIR_WARN("cannot get host CPU capabilities");
ret = VIR_CPU_COMPARE_INCOMPATIBLE;
} else {
ret = cpuCompareXML(caps->host.cpu, xmlDesc);
}
cleanup:
virObjectUnref(caps);
return ret;
}
static char *
qemuConnectBaselineCPU(virConnectPtr conn ATTRIBUTE_UNUSED,
const char **xmlCPUs,
unsigned int ncpus,
unsigned int flags)
{
char *cpu;
virCheckFlags(0, NULL);
cpu = cpuBaselineXML(xmlCPUs, ncpus, NULL, 0);
return cpu;
}
static int qemuDomainGetJobInfo(virDomainPtr dom,
virDomainJobInfoPtr info) {
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (virDomainObjIsActive(vm)) {
if (priv->job.asyncJob && !priv->job.dump_memory_only) {
memcpy(info, &priv->job.info, sizeof(*info));
/* Refresh elapsed time again just to ensure it
* is fully updated. This is primarily for benefit
* of incoming migration which we don't currently
* monitor actively in the background thread
*/
if (virTimeMillisNow(&info->timeElapsed) < 0)
goto cleanup;
info->timeElapsed -= priv->job.start;
} else {
memset(info, 0, sizeof(*info));
info->type = VIR_DOMAIN_JOB_NONE;
}
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainGetJobStats(virDomainPtr dom,
int *type,
virTypedParameterPtr *params,
int *nparams,
unsigned int flags)
{
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
virTypedParameterPtr par = NULL;
int maxpar = 0;
int npar = 0;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (!priv->job.asyncJob || priv->job.dump_memory_only) {
*type = VIR_DOMAIN_JOB_NONE;
*params = NULL;
*nparams = 0;
ret = 0;
goto cleanup;
}
/* Refresh elapsed time again just to ensure it
* is fully updated. This is primarily for benefit
* of incoming migration which we don't currently
* monitor actively in the background thread
*/
if (virTimeMillisNow(&priv->job.info.timeElapsed) < 0)
goto cleanup;
priv->job.info.timeElapsed -= priv->job.start;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_ELAPSED,
priv->job.info.timeElapsed) < 0)
goto cleanup;
if (priv->job.info.type == VIR_DOMAIN_JOB_BOUNDED &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_REMAINING,
priv->job.info.timeRemaining) < 0)
goto cleanup;
if (priv->job.status.downtime_set &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DOWNTIME,
priv->job.status.downtime) < 0)
goto cleanup;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_TOTAL,
priv->job.info.dataTotal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_PROCESSED,
priv->job.info.dataProcessed) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_REMAINING,
priv->job.info.dataRemaining) < 0)
goto cleanup;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_TOTAL,
priv->job.info.memTotal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_PROCESSED,
priv->job.info.memProcessed) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_REMAINING,
priv->job.info.memRemaining) < 0)
goto cleanup;
if (priv->job.status.ram_duplicate_set) {
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_CONSTANT,
priv->job.status.ram_duplicate) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_NORMAL,
priv->job.status.ram_normal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_NORMAL_BYTES,
priv->job.status.ram_normal_bytes) < 0)
goto cleanup;
}
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_TOTAL,
priv->job.info.fileTotal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_PROCESSED,
priv->job.info.fileProcessed) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_REMAINING,
priv->job.info.fileRemaining) < 0)
goto cleanup;
if (priv->job.status.xbzrle_set) {
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_CACHE,
priv->job.status.xbzrle_cache_size) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_BYTES,
priv->job.status.xbzrle_bytes) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_PAGES,
priv->job.status.xbzrle_pages) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_CACHE_MISSES,
priv->job.status.xbzrle_cache_miss) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_OVERFLOW,
priv->job.status.xbzrle_overflow) < 0)
goto cleanup;
}
*type = priv->job.info.type;
*params = par;
*nparams = npar;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
if (ret < 0)
virTypedParamsFree(par, npar);
return ret;
}
static int qemuDomainAbortJob(virDomainPtr dom) {
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
if (!(vm = qemuDomObjFromDomain(dom)))
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;
} else if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot abort incoming migration;"
" use virDomainDestroy instead"));
goto endjob;
}
VIR_DEBUG("Cancelling job at client request");
qemuDomainObjAbortAsyncJob(vm);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorMigrateCancel(priv->mon);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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 (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", _("domain is not being migrated"));
goto endjob;
}
VIR_DEBUG("Setting migration downtime to %llums", downtime);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSetMigrationDowntime(priv->mon, downtime);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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 (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);
}
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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 (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);
}
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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 (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);
qemuDomainObjExitMonitor(driver, vm);
if (ret == 0)
priv->migMaxBandwidth = bandwidth;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
} else {
priv->migMaxBandwidth = bandwidth;
ret = 0;
}
cleanup:
if (vm)
virObjectUnlock(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;
*bandwidth = priv->migMaxBandwidth;
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
typedef enum {
VIR_DISK_CHAIN_NO_ACCESS,
VIR_DISK_CHAIN_READ_ONLY,
VIR_DISK_CHAIN_READ_WRITE,
} qemuDomainDiskChainMode;
/* Several operations end up adding or removing a single element of a
* disk backing file chain; this helper function ensures that the lock
* manager, cgroup device controller, and security manager labelling
* are all aware of each new file before it is added to a chain, and
* can revoke access to a file no longer needed in a chain. */
static int
qemuDomainPrepareDiskChainElement(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainDiskDefPtr disk,
const char *file,
qemuDomainDiskChainMode mode)
{
/* The easiest way to label a single file with the same
* permissions it would have as if part of the disk chain is to
* temporarily modify the disk in place. */
char *origsrc = disk->src;
int origformat = disk->format;
virStorageFileMetadataPtr origchain = disk->backingChain;
bool origreadonly = disk->readonly;
int ret = -1;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
disk->src = (char *) file; /* casting away const is safe here */
disk->format = VIR_STORAGE_FILE_RAW;
disk->backingChain = NULL;
disk->readonly = mode == VIR_DISK_CHAIN_READ_ONLY;
if (mode == VIR_DISK_CHAIN_NO_ACCESS) {
if (virSecurityManagerRestoreImageLabel(driver->securityManager,
vm->def, disk) < 0)
VIR_WARN("Unable to restore security label on %s", disk->src);
if (qemuTeardownDiskCgroup(vm, disk) < 0)
VIR_WARN("Failed to teardown cgroup for disk path %s", disk->src);
if (virDomainLockDiskDetach(driver->lockManager, vm, disk) < 0)
VIR_WARN("Unable to release lock on %s", disk->src);
} else if (virDomainLockDiskAttach(driver->lockManager, cfg->uri,
vm, disk) < 0 ||
qemuSetupDiskCgroup(vm, disk) < 0 ||
virSecurityManagerSetImageLabel(driver->securityManager,
vm->def, disk) < 0) {
goto cleanup;
}
ret = 0;
cleanup:
disk->src = origsrc;
disk->format = origformat;
disk->backingChain = origchain;
disk->readonly = origreadonly;
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainSnapshotFSFreeze(virDomainObjPtr vm) {
qemuDomainObjPrivatePtr priv = vm->privateData;
int freezed;
if (priv->agentError) {
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not "
"available due to an error"));
return -1;
}
if (!priv->agent) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
return -1;
}
qemuDomainObjEnterAgent(vm);
freezed = qemuAgentFSFreeze(priv->agent);
qemuDomainObjExitAgent(vm);
return freezed;
}
static int
qemuDomainSnapshotFSThaw(virDomainObjPtr vm, bool report)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
int thawed;
virErrorPtr err = NULL;
if (priv->agentError) {
if (report)
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not "
"available due to an error"));
return -1;
}
if (!priv->agent) {
if (report)
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
return -1;
}
qemuDomainObjEnterAgent(vm);
if (!report)
err = virSaveLastError();
thawed = qemuAgentFSThaw(priv->agent);
if (!report)
virSetError(err);
qemuDomainObjExitAgent(vm);
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)
{
int 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))) {
virReportOOMError();
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->index];
if (snapdisk->snapshot != VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL)
continue;
if (!snapdisk->format)
snapdisk->format = VIR_STORAGE_FILE_QCOW2;
/* creates cmd line args: qemu-img create -f qcow2 -o */
if (!(cmd = virCommandNewArgList(qemuImgPath,
"create",
"-f",
virStorageFileFormatTypeToString(snapdisk->format),
"-o",
NULL)))
goto cleanup;
if (defdisk->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,
virStorageFileFormatTypeToString(defdisk->format));
} else {
if (!cfg->allowDiskFormatProbing) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unknown image format of '%s' and "
"format probing is disabled"),
defdisk->src);
goto cleanup;
}
/* adds cmd line arg: backing_file=/path/to/backing/file */
virCommandAddArgFormat(cmd, "backing_file=%s", defdisk->src);
}
/* adds cmd line args: /path/to/target/file */
virCommandAddArg(cmd, snapdisk->file);
/* If the target does not exist, we're going to create it possibly */
if (!virFileExists(snapdisk->file))
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->index];
if (snapdisk->snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL) {
VIR_FREE(defdisk->src);
if (VIR_STRDUP(defdisk->src, snapdisk->file) < 0) {
/* we cannot rollback here in a sane way */
goto cleanup;
}
defdisk->format = snapdisk->format;
}
}
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->file) < 0)
VIR_WARN("Failed to remove snapshot image '%s'",
snapdisk->file);
}
}
virBitmapFree(created);
virObjectUnref(cfg);
return ret;
}
/* The domain is expected to be locked and active. */
static int
qemuDomainSnapshotCreateActiveInternal(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr *vmptr,
virDomainSnapshotObjPtr snap,
unsigned int flags)
{
virDomainObjPtr vm = *vmptr;
qemuDomainObjPrivatePtr priv = vm->privateData;
virDomainEventPtr event = NULL;
bool resume = false;
int ret = -1;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
return -1;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
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_NONE) < 0)
goto cleanup;
resume = true;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto cleanup;
}
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorCreateSnapshot(priv->mon, snap->def->name);
qemuDomainObjExitMonitor(driver, vm);
if (ret < 0)
goto cleanup;
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_HALT) {
event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT);
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT, 0);
virDomainAuditStop(vm, "from-snapshot");
/* We already filtered the _HALT flag for persistent domains
* only, so this end job never drops the last reference. */
ignore_value(qemuDomainObjEndJob(driver, vm));
resume = false;
vm = NULL;
}
cleanup:
if (resume && virDomainObjIsActive(vm) &&
qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_NONE) < 0) {
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR);
if (virGetLastError() == NULL) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("resuming after snapshot failed"));
}
}
endjob:
if (vm && qemuDomainObjEndJob(driver, vm) == 0) {
/* Only possible if a transient vm quit while our locks were down,
* in which case we don't want to save snapshot metadata. */
*vmptr = NULL;
ret = -1;
}
if (event)
qemuDomainEventQueue(driver, event);
return ret;
}
static int
qemuDomainSnapshotPrepare(virDomainObjPtr vm, virDomainSnapshotDefPtr def,
unsigned int *flags)
{
int ret = -1;
int i;
bool active = virDomainObjIsActive(vm);
struct stat st;
bool reuse = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT) != 0;
bool atomic = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC) != 0;
bool found_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];
switch (disk->snapshot) {
case VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL:
if (def->state != VIR_DOMAIN_DISK_SNAPSHOT &&
dom_disk->type == VIR_DOMAIN_DISK_TYPE_NETWORK &&
(dom_disk->protocol == VIR_DOMAIN_DISK_PROTOCOL_SHEEPDOG ||
dom_disk->protocol == VIR_DOMAIN_DISK_PROTOCOL_RBD)) {
break;
}
if (vm->def->disks[i]->format > 0 &&
vm->def->disks[i]->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]->format));
goto cleanup;
}
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;
}
found_internal = true;
break;
case VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL:
if (!disk->format) {
disk->format = VIR_STORAGE_FILE_QCOW2;
} else if (disk->format != VIR_STORAGE_FILE_QCOW2 &&
disk->format != VIR_STORAGE_FILE_QED) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("external snapshot format for disk %s "
"is unsupported: %s"),
disk->name,
virStorageFileFormatTypeToString(disk->format));
goto cleanup;
}
if (stat(disk->file, &st) < 0) {
if (errno != ENOENT) {
virReportSystemError(errno,
_("unable to stat for disk %s: %s"),
disk->name, disk->file);
goto cleanup;
} else if (reuse) {
virReportSystemError(errno,
_("missing existing file for disk %s: %s"),
disk->name, disk->file);
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"),
disk->name, disk->file);
goto cleanup;
}
external++;
break;
case VIR_DOMAIN_SNAPSHOT_LOCATION_NONE:
break;
case VIR_DOMAIN_SNAPSHOT_LOCATION_DEFAULT:
default:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unexpected code path"));
goto cleanup;
}
}
/* internal snapshot requires a disk image to store the memory image to */
if (def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL &&
!found_internal) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("internal checkpoints require at least "
"one disk 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) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("mixing internal and external snapshots is not "
"supported yet"));
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;
}
/* The domain is expected to hold monitor lock. */
static int
qemuDomainSnapshotCreateSingleDiskActive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotDiskDefPtr snap,
virDomainDiskDefPtr disk,
virDomainDiskDefPtr persistDisk,
virJSONValuePtr actions,
bool reuse)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
char *device = NULL;
char *source = NULL;
int format = snap->format;
const char *formatStr = NULL;
char *persistSource = NULL;
int ret = -1;
int fd = -1;
bool need_unlink = false;
if (snap->snapshot != VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unexpected code path"));
return -1;
}
if (virAsprintf(&device, "drive-%s", disk->info.alias) < 0 ||
VIR_STRDUP(source, snap->file) < 0 ||
(persistDisk && VIR_STRDUP(persistSource, source) < 0)) {
virReportOOMError();
goto cleanup;
}
/* create the stub file and set selinux labels; manipulate disk in
* place, in a way that can be reverted on failure. */
if (!reuse) {
fd = qemuOpenFile(driver, source, O_WRONLY | O_TRUNC | O_CREAT,
&need_unlink, NULL);
if (fd < 0)
goto cleanup;
VIR_FORCE_CLOSE(fd);
}
/* XXX Here, we know we are about to alter disk->backingChain if
* successful, so we nuke the existing chain so that future
* commands will recompute it. Better would be storing the chain
* ourselves rather than reprobing, but this requires modifying
* domain_conf and our XML to fully track the chain across
* libvirtd restarts. */
virStorageFileFreeMetadata(disk->backingChain);
disk->backingChain = NULL;
if (qemuDomainPrepareDiskChainElement(driver, vm, disk, source,
VIR_DISK_CHAIN_READ_WRITE) < 0) {
qemuDomainPrepareDiskChainElement(driver, vm, disk, source,
VIR_DISK_CHAIN_NO_ACCESS);
goto cleanup;
}
/* create the actual snapshot */
if (snap->format)
formatStr = virStorageFileFormatTypeToString(snap->format);
ret = qemuMonitorDiskSnapshot(priv->mon, actions, device, source,
formatStr, reuse);
virDomainAuditDisk(vm, disk->src, source, "snapshot", ret >= 0);
if (ret < 0)
goto cleanup;
/* Update vm in place to match changes. */
need_unlink = false;
VIR_FREE(disk->src);
disk->src = source;
source = NULL;
disk->format = format;
if (persistDisk) {
VIR_FREE(persistDisk->src);
persistDisk->src = persistSource;
persistSource = NULL;
persistDisk->format = format;
}
cleanup:
if (need_unlink && unlink(source))
VIR_WARN("unable to unlink just-created %s", source);
VIR_FREE(device);
VIR_FREE(source);
VIR_FREE(persistSource);
return ret;
}
/* The domain is expected to hold monitor lock. This is the
* counterpart to qemuDomainSnapshotCreateSingleDiskActive, called
* only on a failed transaction. */
static void
qemuDomainSnapshotUndoSingleDiskActive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainDiskDefPtr origdisk,
virDomainDiskDefPtr disk,
virDomainDiskDefPtr persistDisk,
bool need_unlink)
{
char *source = NULL;
char *persistSource = NULL;
struct stat st;
if (VIR_STRDUP(source, origdisk->src) < 0 ||
(persistDisk && VIR_STRDUP(persistSource, source) < 0))
goto cleanup;
qemuDomainPrepareDiskChainElement(driver, vm, disk, origdisk->src,
VIR_DISK_CHAIN_NO_ACCESS);
if (need_unlink && stat(disk->src, &st) == 0 &&
S_ISREG(st.st_mode) && unlink(disk->src) < 0)
VIR_WARN("Unable to remove just-created %s", disk->src);
/* Update vm in place to match changes. */
VIR_FREE(disk->src);
disk->src = source;
source = NULL;
disk->format = origdisk->format;
if (persistDisk) {
VIR_FREE(persistDisk->src);
persistDisk->src = persistSource;
persistSource = NULL;
persistDisk->format = origdisk->format;
}
cleanup:
VIR_FREE(source);
VIR_FREE(persistSource);
}
/* The domain is expected to be locked and active. */
static int
qemuDomainSnapshotCreateDiskActive(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap,
unsigned int flags,
enum qemuDomainAsyncJob asyncJob)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virJSONValuePtr actions = NULL;
int ret = -1;
int i;
bool persist = false;
bool reuse = (flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT) != 0;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION)) {
if (!(actions = virJSONValueNewArray())) {
virReportOOMError();
goto cleanup;
}
} else if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DISK_SNAPSHOT)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("live disk snapshot not supported with this "
"QEMU binary"));
goto cleanup;
}
/* No way to roll back if first disk succeeds but later disks
* fail, unless we have transaction support.
* Based on earlier qemuDomainSnapshotPrepare, all
* disks in this list are now either SNAPSHOT_NO, or
* SNAPSHOT_EXTERNAL with a valid file name and qcow2 format. */
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
goto cleanup;
for (i = 0; i < snap->def->ndisks; i++) {
virDomainDiskDefPtr persistDisk = NULL;
if (snap->def->disks[i].snapshot == VIR_DOMAIN_SNAPSHOT_LOCATION_NONE)
continue;
if (vm->newDef) {
int indx = virDomainDiskIndexByName(vm->newDef,
vm->def->disks[i]->dst,
false);
if (indx >= 0) {
persistDisk = vm->newDef->disks[indx];
persist = true;
}
}
ret = qemuDomainSnapshotCreateSingleDiskActive(driver, vm,
&snap->def->disks[i],
vm->def->disks[i],
persistDisk, actions,
reuse);
if (ret < 0)
break;
}
if (actions) {
if (ret == 0)
ret = qemuMonitorTransaction(priv->mon, actions);
virJSONValueFree(actions);
if (ret < 0) {
/* Transaction failed; undo the changes to vm. */
bool need_unlink = !(flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT);
while (--i >= 0) {
virDomainDiskDefPtr persistDisk = NULL;
if (snap->def->disks[i].snapshot ==
VIR_DOMAIN_SNAPSHOT_LOCATION_NONE)
continue;
if (vm->newDef) {
int indx = virDomainDiskIndexByName(vm->newDef,
vm->def->disks[i]->dst,
false);
if (indx >= 0)
persistDisk = vm->newDef->disks[indx];
}
qemuDomainSnapshotUndoSingleDiskActive(driver, vm,
snap->def->dom->disks[i],
vm->def->disks[i],
persistDisk,
need_unlink);
}
}
}
qemuDomainObjExitMonitor(driver, vm);
cleanup:
if (ret == 0 || !virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION)) {
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0 ||
(persist && virDomainSaveConfig(cfg->configDir, vm->newDef) < 0))
ret = -1;
}
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainSnapshotCreateActiveExternal(virConnectPtr conn,
virQEMUDriverPtr driver,
virDomainObjPtr *vmptr,
virDomainSnapshotObjPtr snap,
unsigned int flags)
{
bool resume = false;
int ret = -1;
virDomainObjPtr vm = *vmptr;
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;
if (qemuDomainObjBeginAsyncJob(driver, vm, QEMU_ASYNC_JOB_SNAPSHOT) < 0)
goto cleanup;
/* If quiesce was requested, then issue a freeze command, and a
* counterpart thaw command, no matter what. The command will
* fail if the guest is paused or the guest agent is not
* running. */
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE) {
if (qemuDomainSnapshotFSFreeze(vm) < 0) {
/* helper reported the error */
thaw = -1;
goto endjob;
} else {
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) {
resume = true;
/* 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 && !(flags & VIR_DOMAIN_SNAPSHOT_CREATE_LIVE)) ||
(!memory && atomic && !transaction)) {
if (qemuProcessStopCPUs(driver, vm, VIR_DOMAIN_PAUSED_SNAPSHOT,
QEMU_ASYNC_JOB_SNAPSHOT) < 0)
goto endjob;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
}
}
/* do the memory snapshot if necessary */
if (memory) {
/* check if migration is possible */
if (!qemuMigrationIsAllowed(driver, vm, vm->def, false))
goto endjob;
/* allow the migration job to be cancelled or the domain to be paused */
qemuDomainObjSetAsyncJobMask(vm, DEFAULT_JOB_MASK |
JOB_MASK(QEMU_JOB_SUSPEND) |
JOB_MASK(QEMU_JOB_MIGRATION_OP));
if (!(xml = qemuDomainDefFormatLive(driver, vm->def, true, false)))
goto endjob;
if ((ret = qemuDomainSaveMemory(driver, vm, snap->def->file,
xml, QEMU_SAVE_FORMAT_RAW,
resume, 0,
QEMU_ASYNC_JOB_SNAPSHOT)) < 0)
goto endjob;
/* the memory image was created, remove it on errors */
memory_unlink = true;
/* forbid any further manipulation */
qemuDomainObjSetAsyncJobMask(vm, DEFAULT_JOB_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 endjob;
/* the snapshot is complete now */
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_HALT) {
virDomainEventPtr event;
event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT);
qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT, 0);
virDomainAuditStop(vm, "from-snapshot");
/* We already filtered the _HALT flag for persistent domains
* only, so this end job never drops the last reference. */
ignore_value(qemuDomainObjEndAsyncJob(driver, vm));
resume = false;
thaw = 0;
vm = NULL;
if (event)
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. */
virDomainEventPtr event;
virDomainObjSetState(vm, VIR_DOMAIN_PAUSED,
VIR_DOMAIN_PAUSED_FROM_SNAPSHOT);
event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT);
if (event)
qemuDomainEventQueue(driver, event);
}
ret = 0;
endjob:
if (resume && vm && virDomainObjIsActive(vm) &&
qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_SNAPSHOT) < 0) {
virDomainEventPtr event = NULL;
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR);
if (event)
qemuDomainEventQueue(driver, event);
if (virGetLastError() == NULL) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("resuming after snapshot failed"));
}
ret = -1;
goto cleanup;
}
if (vm && thaw != 0 &&
qemuDomainSnapshotFSThaw(vm, thaw > 0) < 0) {
/* helper reported the error, if it was needed */
if (thaw > 0)
ret = -1;
}
if (vm && !qemuDomainObjEndAsyncJob(driver, vm)) {
/* Only possible if a transient vm quit while our locks were down,
* in which case we don't want to save snapshot metadata.
*/
*vmptr = NULL;
ret = -1;
}
cleanup:
VIR_FREE(xml);
if (memory_unlink && ret < 0)
unlink(snap->def->file);
return ret;
}
static virDomainSnapshotPtr
qemuDomainSnapshotCreateXML(virDomainPtr domain,
const char *xmlDesc,
unsigned int flags)
{
virQEMUDriverPtr driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
char *xml = NULL;
virDomainSnapshotObjPtr snap = NULL;
virDomainSnapshotPtr snapshot = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
virDomainSnapshotDefPtr def = NULL;
bool update_current = true;
unsigned int parse_flags = VIR_DOMAIN_SNAPSHOT_PARSE_DISKS;
virDomainSnapshotObjPtr other = NULL;
int align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL;
int align_match = true;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
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);
if ((flags & VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE) &&
!(flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("quiesce requires disk-only"));
return NULL;
}
if (((flags & VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE) &&
!(flags & VIR_DOMAIN_SNAPSHOT_CREATE_CURRENT)) ||
(flags & VIR_DOMAIN_SNAPSHOT_CREATE_NO_METADATA))
update_current = false;
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE)
parse_flags |= VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE;
virUUIDFormat(domain->uuid, uuidstr);
if (!(vm = qemuDomObjFromDomain(domain)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
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 (virDomainHasDiskMirror(vm)) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE, "%s",
_("domain has active block copy job"));
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,
QEMU_EXPECTED_VIRT_TYPES,
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 ||
flags & VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("live snapshot creation is supported only "
"with external checkpoints"));
goto cleanup;
}
if ((def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL ||
def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL) &&
flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
_("disk-only snapshot creation is not compatible with "
"memory snapshot"));
goto cleanup;
}
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE) {
/* Prevent circular chains */
if (def->parent) {
if (STREQ(def->name, def->parent)) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot set snapshot %s as its own parent"),
def->name);
goto cleanup;
}
other = virDomainSnapshotFindByName(vm->snapshots, def->parent);
if (!other) {
virReportError(VIR_ERR_INVALID_ARG,
_("parent %s for snapshot %s not found"),
def->parent, def->name);
goto cleanup;
}
while (other->def->parent) {
if (STREQ(other->def->parent, def->name)) {
virReportError(VIR_ERR_INVALID_ARG,
_("parent %s would create cycle to %s"),
other->def->name, def->name);
goto cleanup;
}
other = virDomainSnapshotFindByName(vm->snapshots,
other->def->parent);
if (!other) {
VIR_WARN("snapshots are inconsistent for %s",
vm->def->name);
break;
}
}
}
/* Check that any replacement is compatible */
if ((flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) &&
def->state != VIR_DOMAIN_DISK_SNAPSHOT) {
virReportError(VIR_ERR_INVALID_ARG,
_("disk-only flag for snapshot %s requires "
"disk-snapshot state"),
def->name);
goto cleanup;
}
if (def->dom &&
memcmp(def->dom->uuid, domain->uuid, VIR_UUID_BUFLEN)) {
virReportError(VIR_ERR_INVALID_ARG,
_("definition for snapshot %s must use uuid %s"),
def->name, uuidstr);
goto cleanup;
}
other = virDomainSnapshotFindByName(vm->snapshots, def->name);
if (other) {
if ((other->def->state == VIR_DOMAIN_RUNNING ||
other->def->state == VIR_DOMAIN_PAUSED) !=
(def->state == VIR_DOMAIN_RUNNING ||
def->state == VIR_DOMAIN_PAUSED)) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot change between online and offline "
"snapshot state in snapshot %s"),
def->name);
goto cleanup;
}
if ((other->def->state == VIR_DOMAIN_DISK_SNAPSHOT) !=
(def->state == VIR_DOMAIN_DISK_SNAPSHOT)) {
virReportError(VIR_ERR_INVALID_ARG,
_("cannot change between disk snapshot and "
"system checkpoint in snapshot %s"),
def->name);
goto cleanup;
}
if (other->def->dom) {
if (def->dom) {
if (!virDomainDefCheckABIStability(other->def->dom,
def->dom))
goto cleanup;
} else {
/* Transfer the domain def */
def->dom = other->def->dom;
other->def->dom = NULL;
}
}
if (def->dom) {
if (def->state == VIR_DOMAIN_DISK_SNAPSHOT ||
virDomainSnapshotDefIsExternal(def)) {
align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
align_match = false;
}
if (virDomainSnapshotAlignDisks(def, align_location,
align_match) < 0) {
/* revert stealing of the snapshot domain definition */
if (def->dom && !other->def->dom) {
other->def->dom = def->dom;
def->dom = NULL;
}
goto cleanup;
}
}
if (other == vm->current_snapshot) {
update_current = true;
vm->current_snapshot = NULL;
}
/* Drop and rebuild the parent relationship, but keep all
* child relations by reusing snap. */
virDomainSnapshotDropParent(other);
virDomainSnapshotDefFree(other->def);
other->def = def;
def = NULL;
snap = other;
} else {
if (def->dom) {
if (def->state == VIR_DOMAIN_DISK_SNAPSHOT ||
def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL) {
align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
align_match = false;
}
if (virDomainSnapshotAlignDisks(def, align_location,
align_match) < 0)
goto cleanup;
}
}
} 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, true, true)) ||
!(def->dom = virDomainDefParseString(xml, caps, driver->xmlopt,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
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);
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(vm, def, &flags) < 0)
goto cleanup;
}
if (!snap) {
if (!(snap = virDomainSnapshotAssignDef(vm->snapshots, def)))
goto cleanup;
def = NULL;
}
if (update_current)
snap->def->current = true;
if (vm->current_snapshot) {
if (!(flags & VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE) &&
VIR_STRDUP(snap->def->parent, vm->current_snapshot->def->name) < 0)
goto cleanup;
if (update_current) {
vm->current_snapshot->def->current = false;
if (qemuDomainSnapshotWriteMetadata(vm, vm->current_snapshot,
cfg->snapshotDir) < 0)
goto cleanup;
vm->current_snapshot = NULL;
}
}
/* actually do the snapshot */
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_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 cleanup;
} else {
/* internal checkpoint */
if (qemuDomainSnapshotCreateActiveInternal(domain->conn, driver,
&vm, snap, flags) < 0)
goto cleanup;
}
} 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 cleanup;
} else {
if (qemuDomainSnapshotCreateInactiveInternal(driver, vm, snap) < 0)
goto cleanup;
}
}
/* 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);
cleanup:
if (vm) {
if (snapshot && !(flags & VIR_DOMAIN_SNAPSHOT_CREATE_NO_METADATA)) {
if (qemuDomainSnapshotWriteMetadata(vm, snap,
cfg->snapshotDir) < 0) {
/* if writing of metadata fails, error out rather than trying
* to silently carry on without completing the snapshot */
virDomainSnapshotFree(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);
}
virObjectUnlock(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)))
goto cleanup;
n = virDomainSnapshotObjListGetNames(vm->snapshots, NULL, names, nameslen,
flags);
cleanup:
if (vm)
virObjectUnlock(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)))
goto cleanup;
n = virDomainSnapshotObjListNum(vm->snapshots, NULL, flags);
cleanup:
if (vm)
virObjectUnlock(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)))
goto cleanup;
n = virDomainListSnapshots(vm->snapshots, NULL, domain, snaps, flags);
cleanup:
if (vm)
virObjectUnlock(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)))
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
n = virDomainSnapshotObjListGetNames(vm->snapshots, snap, names, nameslen,
flags);
cleanup:
if (vm)
virObjectUnlock(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)))
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
n = virDomainSnapshotObjListNum(vm->snapshots, snap, flags);
cleanup:
if (vm)
virObjectUnlock(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)))
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
n = virDomainListSnapshots(vm->snapshots, snap, snapshot->domain, snaps,
flags);
cleanup:
if (vm)
virObjectUnlock(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)))
goto cleanup;
if (!(snap = qemuSnapObjFromName(vm, name)))
goto cleanup;
snapshot = virGetDomainSnapshot(domain, snap->def->name);
cleanup:
if (vm)
virObjectUnlock(vm);
return snapshot;
}
static int qemuDomainHasCurrentSnapshot(virDomainPtr domain,
unsigned int flags)
{
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
goto cleanup;
ret = (vm->current_snapshot != NULL);
cleanup:
if (vm)
virObjectUnlock(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)))
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:
if (vm)
virObjectUnlock(vm);
return parent;
}
static virDomainSnapshotPtr qemuDomainSnapshotCurrent(virDomainPtr domain,
unsigned int flags)
{
virDomainObjPtr vm;
virDomainSnapshotPtr snapshot = NULL;
virCheckFlags(0, NULL);
if (!(vm = qemuDomObjFromDomain(domain)))
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:
if (vm)
virObjectUnlock(vm);
return snapshot;
}
static char *qemuDomainSnapshotGetXMLDesc(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
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)))
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
virUUIDFormat(snapshot->domain->uuid, uuidstr);
xml = virDomainSnapshotDefFormat(uuidstr, snap->def, flags, 0);
cleanup:
if (vm)
virObjectUnlock(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)))
goto cleanup;
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
ret = (vm->current_snapshot &&
STREQ(snapshot->name, vm->current_snapshot->def->name));
cleanup:
if (vm)
virObjectUnlock(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)))
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:
if (vm)
virObjectUnlock(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;
virDomainEventPtr event = NULL;
virDomainEventPtr event2 = NULL;
int detail;
qemuDomainObjPrivatePtr priv;
int rc;
virDomainDefPtr config = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = 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.
*/
if (!(vm = qemuDomObjFromSnapshot(snapshot)))
return -1;
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainHasDiskMirror(vm)) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE, "%s",
_("domain has active block copy job"));
goto cleanup;
}
if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
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 cleanup;
}
if (snap->def->state == VIR_DOMAIN_DISK_SNAPSHOT) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("revert to external disk snapshot not supported "
"yet"));
goto cleanup;
}
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 cleanup;
}
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 cleanup;
}
}
if (vm->current_snapshot) {
vm->current_snapshot->def->current = false;
if (qemuDomainSnapshotWriteMetadata(vm, vm->current_snapshot,
cfg->snapshotDir) < 0)
goto cleanup;
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, true);
if (!config)
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (snap->def->state == VIR_DOMAIN_RUNNING
|| snap->def->state == VIR_DOMAIN_PAUSED) {
/* Transitions 2, 3, 5, 6, 8, 9 */
bool was_running = false;
bool was_stopped = false;
/* 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. */
if (config && !virDomainDefCheckABIStability(vm->def, config)) {
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, 0);
virDomainAuditStop(vm, "from-snapshot");
detail = VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT;
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
detail);
if (event)
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_NONE) < 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 = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
detail);
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
}
qemuDomainObjEnterMonitor(driver, vm);
rc = qemuMonitorLoadSnapshot(priv->mon, snap->def->name);
qemuDomainObjExitMonitor(driver, vm);
if (rc < 0) {
/* XXX resume domain if it was running before the
* failed loadvm attempt? */
goto endjob;
}
if (config)
virDomainObjAssignDef(vm, config, false, NULL);
} else {
/* Transitions 2, 3 */
load:
was_stopped = true;
if (config)
virDomainObjAssignDef(vm, config, false, NULL);
rc = qemuProcessStart(snapshot->domain->conn,
driver, vm, 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 = virDomainEventNewFromObj(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 = virDomainEventNewFromObj(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_NONE);
if (rc < 0)
goto endjob;
virDomainEventFree(event);
event = NULL;
if (was_stopped) {
/* Transition 2 */
detail = VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT;
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
detail);
} else if (was_running) {
/* Transition 8 */
detail = VIR_DOMAIN_EVENT_RESUMED;
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
detail);
}
}
} else {
/* 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, 0);
virDomainAuditStop(vm, "from-snapshot");
detail = VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT;
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
detail);
}
if (qemuDomainSnapshotRevertInactive(driver, vm, snap) < 0) {
if (!vm->persistent) {
if (qemuDomainObjEndJob(driver, vm) > 0)
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
goto cleanup;
}
goto endjob;
}
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;
if (event)
qemuDomainEventQueue(driver, event);
rc = qemuProcessStart(snapshot->domain->conn,
driver, vm, NULL, -1, NULL, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE,
start_flags);
virDomainAuditStart(vm, "from-snapshot", rc >= 0);
if (rc < 0) {
if (!vm->persistent) {
if (qemuDomainObjEndJob(driver, vm) > 0)
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
goto cleanup;
}
goto endjob;
}
detail = VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT;
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
detail);
if (paused) {
detail = VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT;
event2 = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
detail);
}
}
}
ret = 0;
endjob:
if (vm && qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm && ret == 0) {
if (qemuDomainSnapshotWriteMetadata(vm, snap,
cfg->snapshotDir) < 0)
ret = -1;
else
vm->current_snapshot = snap;
} else if (snap) {
snap->def->current = false;
}
if (event) {
qemuDomainEventQueue(driver, event);
if (event2)
qemuDomainEventQueue(driver, event2);
}
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
typedef struct _virQEMUSnapReparent virQEMUSnapReparent;
typedef virQEMUSnapReparent *virQEMUSnapReparentPtr;
struct _virQEMUSnapReparent {
virQEMUDriverConfigPtr cfg;
virDomainSnapshotObjPtr parent;
virDomainObjPtr vm;
int err;
virDomainSnapshotObjPtr last;
};
static void
qemuDomainSnapshotReparentChildren(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *data)
{
virDomainSnapshotObjPtr snap = payload;
virQEMUSnapReparentPtr rep = data;
if (rep->err < 0) {
return;
}
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;
}
if (!snap->sibling)
rep->last = snap;
rep->err = qemuDomainSnapshotWriteMetadata(rep->vm, snap,
rep->cfg->snapshotDir);
}
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 (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
goto cleanup;
if (!metadata_only) {
if (!(flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY) &&
virDomainSnapshotIsExternal(snap))
external++;
if (flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN)
virDomainSnapshotForEachDescendant(snap,
qemuDomainSnapshotCountExternal,
&external);
if (external) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("deletion of %d external disk snapshots not "
"supported yet"), external);
goto cleanup;
}
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
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,
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;
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:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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 (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
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;
qemuDomainObjTaint(driver, vm, VIR_DOMAIN_TAINT_CUSTOM_MONITOR, -1);
hmp = !!(flags & VIR_DOMAIN_QEMU_MONITOR_COMMAND_HMP);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorArbitraryCommand(priv->mon, cmd, result, hmp);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
}
cleanup:
if (vm)
virObjectUnlock(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 (!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) {
virReportOOMError();
goto cleanup;
}
if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, def->emulator)))
goto cleanup;
if (qemuCanonicalizeMachine(def, qemuCaps) < 0)
goto cleanup;
if (qemuDomainAssignAddresses(def, qemuCaps, NULL) < 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;
def = NULL;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (qemuProcessAttach(conn, driver, vm, pid,
pidfile, monConfig, monJSON) < 0) {
monConfig = NULL;
goto endjob;
}
monConfig = NULL;
dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
if (dom) dom->id = vm->def->id;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
virDomainDefFree(def);
virObjectUnref(qemuCaps);
virDomainChrSourceDefFree(monConfig);
if (vm)
virObjectUnlock(vm);
VIR_FREE(pidfile);
virObjectUnref(caps);
return dom;
}
static int
qemuDomainOpenConsole(virDomainPtr dom,
const char *dev_name,
virStreamPtr st,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
int i;
virDomainChrDefPtr chr = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_CONSOLE_SAFE |
VIR_DOMAIN_CONSOLE_FORCE, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
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"),
NULLSTR(dev_name));
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:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainOpenChannel(virDomainPtr dom,
const char *name,
virStreamPtr st,
unsigned int flags)
{
virDomainObjPtr vm = NULL;
int ret = -1;
int i;
virDomainChrDefPtr chr = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_CHANNEL_FORCE, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
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(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"),
NULLSTR(name));
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:
if (vm)
virObjectUnlock(vm);
return ret;
}
static char *
qemuDiskPathToAlias(virDomainObjPtr vm, const char *path, int *idx)
{
int i;
char *ret = NULL;
virDomainDiskDefPtr disk;
i = virDomainDiskIndexByName(vm->def, path, true);
if (i < 0)
goto cleanup;
disk = vm->def->disks[i];
if (idx)
*idx = i;
if (disk->src) {
if (virAsprintf(&ret, "drive-%s", disk->info.alias) < 0) {
virReportOOMError();
return NULL;
}
}
cleanup:
if (!ret) {
virReportError(VIR_ERR_INVALID_ARG,
"%s", _("No device found for specified path"));
}
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(virConnectPtr conn,
virQEMUDriverPtr driver, virDomainObjPtr vm,
const char *device, virDomainDiskDefPtr disk)
{
int ret = -1;
qemuDomainObjPrivatePtr priv = vm->privateData;
virDomainBlockJobInfo info;
const char *format = virStorageFileFormatTypeToString(disk->mirrorFormat);
bool resume = false;
char *oldsrc = NULL;
int oldformat;
virStorageFileMetadataPtr oldchain = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
/* Probe the status, if needed. */
if (!disk->mirroring) {
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorBlockJob(priv->mon, device, NULL, 0, &info,
BLOCK_JOB_INFO, true);
qemuDomainObjExitMonitor(driver, vm);
if (ret < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto cleanup;
}
if (ret == 1 && info.cur == info.end &&
info.type == VIR_DOMAIN_BLOCK_JOB_TYPE_COPY)
disk->mirroring = true;
}
if (!disk->mirroring) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE,
_("disk '%s' not ready for pivot yet"),
disk->dst);
goto cleanup;
}
/* If we are using the older 'drive-reopen', we want to make sure
* that management apps can tell whether the command succeeded,
* even if libvirtd is restarted at the wrong time. To accomplish
* that, we pause the guest before drive-reopen, and resume it
* only when we know the outcome; if libvirtd restarts, then
* management will see the guest still paused, and know that no
* guest I/O has caused the source and mirror to diverge. XXX
* With the newer 'block-job-complete', we need to use a
* persistent bitmap to make things safe; so for now, we just
* blindly pause the guest. */
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
if (qemuProcessStopCPUs(driver, vm, VIR_DOMAIN_PAUSED_SAVE,
QEMU_ASYNC_JOB_NONE) < 0)
goto cleanup;
resume = true;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto cleanup;
}
}
/* We previously labeled only the top-level image; but if the
* image includes a relative 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. */
oldsrc = disk->src;
oldformat = disk->format;
oldchain = disk->backingChain;
disk->src = disk->mirror;
disk->format = disk->mirrorFormat;
disk->backingChain = NULL;
if (qemuDomainDetermineDiskChain(driver, disk, false) < 0) {
disk->src = oldsrc;
disk->format = oldformat;
disk->backingChain = oldchain;
goto cleanup;
}
if (disk->mirrorFormat && disk->mirrorFormat != VIR_STORAGE_FILE_RAW &&
(virDomainLockDiskAttach(driver->lockManager, cfg->uri,
vm, disk) < 0 ||
qemuSetupDiskCgroup(vm, disk) < 0 ||
virSecurityManagerSetImageLabel(driver->securityManager, vm->def,
disk) < 0)) {
disk->src = oldsrc;
disk->format = oldformat;
disk->backingChain = oldchain;
goto cleanup;
}
/* Attempt the pivot. */
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorDrivePivot(priv->mon, device, disk->mirror, format);
qemuDomainObjExitMonitor(driver, vm);
if (ret == 0) {
/* XXX We want to revoke security labels and disk lease, as
* well as audit that revocation, before dropping the original
* source. But it gets tricky if both source and mirror share
* common backing files (we want to only revoke the non-shared
* portion of the chain, and is made more difficult by the
* fact that we aren't tracking the full chain ourselves; so
* for now, we leak the access to the original. */
VIR_FREE(oldsrc);
virStorageFileFreeMetadata(oldchain);
disk->mirror = NULL;
} else {
/* On failure, qemu abandons the mirror, and reverts back to
* the source disk (RHEL 6.3 has a bug where the revert could
* cause catastrophic failure in qemu, but we don't need to
* worry about it here as it is not an upstream qemu problem. */
/* XXX should we be parsing the exact qemu error, or calling
* 'query-block', to see what state we really got left in
* before killing the mirroring job? And just as on the
* success case, there's security labeling to worry about. */
disk->src = oldsrc;
disk->format = oldformat;
virStorageFileFreeMetadata(disk->backingChain);
disk->backingChain = oldchain;
VIR_FREE(disk->mirror);
}
disk->mirrorFormat = VIR_STORAGE_FILE_NONE;
disk->mirroring = false;
cleanup:
if (resume && virDomainObjIsActive(vm) &&
qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_NONE) < 0) {
virDomainEventPtr event = NULL;
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR);
if (event)
qemuDomainEventQueue(driver, event);
if (virGetLastError() == NULL) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("resuming after drive-reopen failed"));
}
}
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainBlockJobImpl(virDomainPtr dom, const char *path, const char *base,
unsigned long bandwidth, virDomainBlockJobInfoPtr info,
int mode, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
char *device = NULL;
int ret = -1;
bool async = false;
virDomainEventPtr event = NULL;
int idx;
virDomainDiskDefPtr disk;
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto cleanup;
}
priv = vm->privateData;
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_ASYNC)) {
async = true;
} else if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_SYNC)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("block jobs not supported with this QEMU binary"));
goto cleanup;
} else if (base) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("partial block pull not supported with this "
"QEMU binary"));
goto cleanup;
} else if (mode == BLOCK_JOB_PULL && bandwidth) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("setting bandwidth at start of block pull not "
"supported with this QEMU binary"));
goto cleanup;
}
device = qemuDiskPathToAlias(vm, path, &idx);
if (!device)
goto cleanup;
disk = vm->def->disks[idx];
if (mode == BLOCK_JOB_PULL && disk->mirror) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE,
_("disk '%s' already in active block copy job"),
disk->dst);
goto cleanup;
}
if (mode == BLOCK_JOB_ABORT &&
(flags & VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT) &&
!(async && disk->mirror)) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("pivot of disk '%s' requires an active copy job"),
disk->dst);
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->mirror && mode == BLOCK_JOB_ABORT &&
(flags & VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT)) {
ret = qemuDomainBlockPivot(dom->conn, driver, vm, device, disk);
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
/* XXX - libvirt should really be tracking the backing file chain
* itself, and validating that base is on the chain, rather than
* relying on qemu to do this. */
ret = qemuMonitorBlockJob(priv->mon, device, base, bandwidth, info, mode,
async);
qemuDomainObjExitMonitor(driver, vm);
if (ret < 0)
goto endjob;
/* Snoop block copy operations, so future cancel operations can
* avoid checking if pivot is safe. */
if (mode == BLOCK_JOB_INFO && ret == 1 && disk->mirror &&
info->cur == info->end && info->type == VIR_DOMAIN_BLOCK_JOB_TYPE_COPY)
disk->mirroring = true;
/* A successful block job cancelation stops any mirroring. */
if (mode == BLOCK_JOB_ABORT && disk->mirror) {
/* XXX We should also revoke security labels and disk lease on
* the mirror, and audit that fact, before dropping things. */
VIR_FREE(disk->mirror);
disk->mirrorFormat = VIR_STORAGE_FILE_NONE;
disk->mirroring = false;
}
/* 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, 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 (mode == BLOCK_JOB_ABORT) {
if (!async) {
int type = VIR_DOMAIN_BLOCK_JOB_TYPE_PULL;
int status = VIR_DOMAIN_BLOCK_JOB_CANCELED;
event = virDomainEventBlockJobNewFromObj(vm, disk->src, type,
status);
} else if (!(flags & VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC)) {
while (1) {
/* Poll every 50ms */
static struct timespec ts = { .tv_sec = 0,
.tv_nsec = 50 * 1000 * 1000ull };
virDomainBlockJobInfo dummy;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorBlockJob(priv->mon, device, NULL, 0, &dummy,
BLOCK_JOB_INFO, async);
qemuDomainObjExitMonitor(driver, vm);
if (ret <= 0)
break;
virObjectUnlock(vm);
nanosleep(&ts, NULL);
virObjectLock(vm);
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
ret = -1;
break;
}
}
}
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
VIR_FREE(device);
if (vm)
virObjectUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
return ret;
}
static int
qemuDomainBlockJobAbort(virDomainPtr dom, const char *path, unsigned int flags)
{
virCheckFlags(VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC |
VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT, -1);
return qemuDomainBlockJobImpl(dom, path, NULL, 0, NULL, BLOCK_JOB_ABORT,
flags);
}
static int
qemuDomainGetBlockJobInfo(virDomainPtr dom, const char *path,
virDomainBlockJobInfoPtr info, unsigned int flags)
{
virCheckFlags(0, -1);
return qemuDomainBlockJobImpl(dom, path, NULL, 0, info, BLOCK_JOB_INFO,
flags);
}
static int
qemuDomainBlockJobSetSpeed(virDomainPtr dom, const char *path,
unsigned long bandwidth, unsigned int flags)
{
virCheckFlags(0, -1);
return qemuDomainBlockJobImpl(dom, path, NULL, bandwidth, NULL,
BLOCK_JOB_SPEED, flags);
}
static int
qemuDomainBlockCopy(virDomainPtr dom, const char *path,
const char *dest, const char *format,
unsigned long bandwidth, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
char *device = NULL;
virDomainDiskDefPtr disk;
int ret = -1;
int idx;
struct stat st;
bool need_unlink = false;
char *mirror = NULL;
virQEMUDriverConfigPtr cfg = NULL;
/* Preliminaries: find the disk we are editing, sanity checks */
virCheckFlags(VIR_DOMAIN_BLOCK_REBASE_SHALLOW |
VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto cleanup;
}
device = qemuDiskPathToAlias(vm, path, &idx);
if (!device) {
goto cleanup;
}
disk = vm->def->disks[idx];
if (disk->mirror) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE,
_("disk '%s' already in active block copy job"),
disk->dst);
goto cleanup;
}
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 cleanup;
}
if (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 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 (qemuDomainDetermineDiskChain(driver, disk, false) < 0)
goto endjob;
if ((flags & VIR_DOMAIN_BLOCK_REBASE_SHALLOW) &&
STREQ_NULLABLE(format, "raw") &&
disk->backingChain->backingStore) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk '%s' has backing file, so raw shallow copy "
"is not possible"),
disk->dst);
goto endjob;
}
/* Prepare the destination file. */
if (stat(dest, &st) < 0) {
if (errno != ENOENT) {
virReportSystemError(errno, _("unable to stat for disk %s: %s"),
disk->dst, dest);
goto endjob;
} else if (flags & VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT) {
virReportSystemError(errno,
_("missing destination file for disk %s: %s"),
disk->dst, dest);
goto endjob;
}
} else if (!S_ISBLK(st.st_mode) && st.st_size &&
!(flags & VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("external destination file for disk %s already "
"exists and is not a block device: %s"),
disk->dst, dest);
goto endjob;
}
if (!(flags & VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT)) {
int fd = qemuOpenFile(driver, dest, O_WRONLY | O_TRUNC | O_CREAT,
&need_unlink, NULL);
if (fd < 0)
goto endjob;
VIR_FORCE_CLOSE(fd);
if (!format)
disk->mirrorFormat = disk->format;
} else if (format) {
disk->mirrorFormat = virStorageFileFormatTypeFromString(format);
if (disk->mirrorFormat <= 0) {
virReportError(VIR_ERR_INVALID_ARG, _("unrecognized format '%s'"),
format);
goto endjob;
}
} else {
/* If the user passed the REUSE_EXT flag, then either they
* also passed the RAW flag (and format is non-NULL), or it is
* safe for us to probe the format from the file that we will
* be using. */
disk->mirrorFormat = virStorageFileProbeFormat(dest, cfg->user,
cfg->group);
}
if (!format && disk->mirrorFormat > 0)
format = virStorageFileFormatTypeToString(disk->mirrorFormat);
if (VIR_STRDUP(mirror, dest) < 0)
goto endjob;
if (qemuDomainPrepareDiskChainElement(driver, vm, disk, dest,
VIR_DISK_CHAIN_READ_WRITE) < 0) {
qemuDomainPrepareDiskChainElement(driver, vm, disk, dest,
VIR_DISK_CHAIN_NO_ACCESS);
goto endjob;
}
/* Actually start the mirroring */
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorDriveMirror(priv->mon, device, dest, format, bandwidth,
flags);
virDomainAuditDisk(vm, NULL, dest, "mirror", ret >= 0);
qemuDomainObjExitMonitor(driver, vm);
if (ret < 0) {
qemuDomainPrepareDiskChainElement(driver, vm, disk, dest,
VIR_DISK_CHAIN_NO_ACCESS);
goto endjob;
}
/* Update vm in place to match changes. */
need_unlink = false;
disk->mirror = mirror;
mirror = NULL;
endjob:
if (need_unlink && unlink(dest))
VIR_WARN("unable to unlink just-created %s", dest);
if (ret < 0)
disk->mirrorFormat = VIR_STORAGE_FILE_NONE;
VIR_FREE(mirror);
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
VIR_FREE(device);
if (vm)
virObjectUnlock(vm);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainBlockRebase(virDomainPtr dom, const char *path, const char *base,
unsigned long bandwidth, unsigned int flags)
{
virCheckFlags(VIR_DOMAIN_BLOCK_REBASE_SHALLOW |
VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT |
VIR_DOMAIN_BLOCK_REBASE_COPY |
VIR_DOMAIN_BLOCK_REBASE_COPY_RAW, -1);
if (flags & VIR_DOMAIN_BLOCK_REBASE_COPY) {
const char *format = NULL;
if (flags & VIR_DOMAIN_BLOCK_REBASE_COPY_RAW)
format = "raw";
flags &= ~(VIR_DOMAIN_BLOCK_REBASE_COPY |
VIR_DOMAIN_BLOCK_REBASE_COPY_RAW);
return qemuDomainBlockCopy(dom, path, base, format, bandwidth, flags);
}
return qemuDomainBlockJobImpl(dom, path, base, bandwidth, NULL,
BLOCK_JOB_PULL, flags);
}
static int
qemuDomainBlockPull(virDomainPtr dom, const char *path, unsigned long bandwidth,
unsigned int flags)
{
virCheckFlags(0, -1);
return qemuDomainBlockJobImpl(dom, path, NULL, bandwidth, NULL,
BLOCK_JOB_PULL, 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;
int idx;
virDomainDiskDefPtr disk = NULL;
const char *top_canon = NULL;
virStorageFileMetadataPtr top_meta = NULL;
const char *top_parent = NULL;
const char *base_canon = NULL;
bool clean_access = false;
virCheckFlags(VIR_DOMAIN_BLOCK_COMMIT_SHALLOW, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
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;
}
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCK_COMMIT)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("online commit not supported with this QEMU binary"));
goto endjob;
}
device = qemuDiskPathToAlias(vm, path, &idx);
if (!device)
goto endjob;
disk = vm->def->disks[idx];
if (!disk->src) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk %s has no source file to be committed"),
disk->dst);
goto endjob;
}
if (qemuDomainDetermineDiskChain(driver, disk, false) < 0)
goto endjob;
if (!top) {
top_canon = disk->src;
top_meta = disk->backingChain;
} else if (!(top_canon = virStorageFileChainLookup(disk->backingChain,
disk->src,
top, &top_meta,
&top_parent))) {
virReportError(VIR_ERR_INVALID_ARG,
_("could not find top '%s' in chain for '%s'"),
top, path);
goto endjob;
}
if (!top_meta || !top_meta->backingStore) {
virReportError(VIR_ERR_INVALID_ARG,
_("top '%s' in chain for '%s' has no backing file"),
top, path);
goto endjob;
}
if (!base && (flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW)) {
base_canon = top_meta->backingStore;
} else if (!(base_canon = virStorageFileChainLookup(top_meta, top_canon,
base, NULL, NULL))) {
virReportError(VIR_ERR_INVALID_ARG,
_("could not find base '%s' below '%s' in chain "
"for '%s'"),
base ? base : "(default)", top_canon, path);
goto endjob;
}
/* Note that this code exploits the fact that
* virStorageFileChainLookup guarantees a simple pointer
* comparison will work, rather than needing full-blown STREQ. */
if ((flags & VIR_DOMAIN_BLOCK_COMMIT_SHALLOW) &&
base_canon != top_meta->backingStore) {
virReportError(VIR_ERR_INVALID_ARG,
_("base '%s' is not immediately below '%s' in chain "
"for '%s'"),
base, top_canon, path);
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 (qemuDomainPrepareDiskChainElement(driver, vm, disk, base_canon,
VIR_DISK_CHAIN_READ_WRITE) < 0 ||
(top_parent && top_parent != disk->src &&
qemuDomainPrepareDiskChainElement(driver, vm, disk,
top_parent,
VIR_DISK_CHAIN_READ_WRITE) < 0))
goto endjob;
/* Start the commit operation. */
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorBlockCommit(priv->mon, device, top_canon, base_canon,
bandwidth);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (ret < 0 && clean_access) {
/* Revert access to read-only, if possible. */
qemuDomainPrepareDiskChainElement(driver, vm, disk, base_canon,
VIR_DISK_CHAIN_READ_ONLY);
if (top_parent && top_parent != disk->src)
qemuDomainPrepareDiskChainElement(driver, vm, disk,
top_parent,
VIR_DISK_CHAIN_READ_ONLY);
}
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
VIR_FREE(device);
if (vm)
virObjectUnlock(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 (!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 (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorOpenGraphics(priv->mon, protocol, fd, "graphicsfd",
(flags & VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH) != 0);
qemuDomainObjExitMonitor(driver, vm);
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuDomainSetBlockIoTune(virDomainPtr dom,
const char *disk,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
virDomainDefPtr persistentDef = NULL;
virDomainBlockIoTuneInfo info;
virDomainBlockIoTuneInfo *oldinfo;
const char *device = NULL;
int ret = -1;
int i;
int idx = -1;
bool set_bytes = false;
bool set_iops = false;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (virTypedParameterArrayValidate(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,
NULL) < 0)
return -1;
memset(&info, 0, sizeof(info));
if (!(vm = qemuDomObjFromDomain(dom)))
return -1;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
priv = vm->privateData;
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto endjob;
if (!(device = qemuDiskPathToAlias(vm, disk, &idx)))
goto endjob;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto endjob;
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_BYTES_SEC)) {
info.total_bytes_sec = param->value.ul;
set_bytes = true;
} else if (STREQ(param->field,
VIR_DOMAIN_BLOCK_IOTUNE_READ_BYTES_SEC)) {
info.read_bytes_sec = param->value.ul;
set_bytes = true;
} else if (STREQ(param->field,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_BYTES_SEC)) {
info.write_bytes_sec = param->value.ul;
set_bytes = true;
} else if (STREQ(param->field,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_IOPS_SEC)) {
info.total_iops_sec = param->value.ul;
set_iops = true;
} else if (STREQ(param->field,
VIR_DOMAIN_BLOCK_IOTUNE_READ_IOPS_SEC)) {
info.read_iops_sec = param->value.ul;
set_iops = true;
} else if (STREQ(param->field,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_IOPS_SEC)) {
info.write_iops_sec = param->value.ul;
set_iops = true;
}
}
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 (flags & VIR_DOMAIN_AFFECT_LIVE) {
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 the user didn't specify bytes limits, inherit previous
* values; likewise if the user didn't specify iops
* limits. */
oldinfo = &vm->def->disks[idx]->blkdeviotune;
if (!set_bytes) {
info.total_bytes_sec = oldinfo->total_bytes_sec;
info.read_bytes_sec = oldinfo->read_bytes_sec;
info.write_bytes_sec = oldinfo->write_bytes_sec;
}
if (!set_iops) {
info.total_iops_sec = oldinfo->total_iops_sec;
info.read_iops_sec = oldinfo->read_iops_sec;
info.write_iops_sec = oldinfo->write_iops_sec;
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSetBlockIoThrottle(priv->mon, device, &info);
qemuDomainObjExitMonitor(driver, vm);
if (ret < 0)
goto endjob;
vm->def->disks[idx]->blkdeviotune = info;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
sa_assert(persistentDef);
oldinfo = &persistentDef->disks[idx]->blkdeviotune;
if (!set_bytes) {
info.total_bytes_sec = oldinfo->total_bytes_sec;
info.read_bytes_sec = oldinfo->read_bytes_sec;
info.write_bytes_sec = oldinfo->write_bytes_sec;
}
if (!set_iops) {
info.total_iops_sec = oldinfo->total_iops_sec;
info.read_iops_sec = oldinfo->read_iops_sec;
info.write_iops_sec = oldinfo->write_iops_sec;
}
persistentDef->disks[idx]->blkdeviotune = info;
ret = virDomainSaveConfig(cfg->configDir, persistentDef);
if (ret < 0) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Write to config file failed"));
goto endjob;
}
}
endjob:
if (!qemuDomainObjEndJob(driver, vm))
vm = NULL;
cleanup:
VIR_FREE(device);
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainGetBlockIoTune(virDomainPtr dom,
const char *disk,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
virDomainDefPtr persistentDef = NULL;
virDomainBlockIoTuneInfo reply;
const char *device = NULL;
int ret = -1;
int i;
virCapsPtr caps = NULL;
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;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if ((*nparams) == 0) {
/* Current number of parameters supported by QEMU Block I/O Throttling */
*nparams = QEMU_NB_BLOCK_IO_TUNE_PARAM;
ret = 0;
goto cleanup;
}
device = qemuDiskPathToAlias(vm, disk, NULL);
if (!device) {
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto endjob;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetBlockIoThrottle(priv->mon, device, &reply);
qemuDomainObjExitMonitor(driver, vm);
if (ret < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
int idx = virDomainDiskIndexByName(vm->def, disk, true);
if (idx < 0)
goto endjob;
reply = persistentDef->disks[idx]->blkdeviotune;
}
for (i = 0; i < QEMU_NB_BLOCK_IO_TUNE_PARAM && i < *nparams; i++) {
virTypedParameterPtr param = &params[i];
switch (i) {
case 0:
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_BYTES_SEC,
VIR_TYPED_PARAM_ULLONG,
reply.total_bytes_sec) < 0)
goto endjob;
break;
case 1:
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_IOTUNE_READ_BYTES_SEC,
VIR_TYPED_PARAM_ULLONG,
reply.read_bytes_sec) < 0)
goto endjob;
break;
case 2:
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_BYTES_SEC,
VIR_TYPED_PARAM_ULLONG,
reply.write_bytes_sec) < 0)
goto endjob;
break;
case 3:
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_IOTUNE_TOTAL_IOPS_SEC,
VIR_TYPED_PARAM_ULLONG,
reply.total_iops_sec) < 0)
goto endjob;
break;
case 4:
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_IOTUNE_READ_IOPS_SEC,
VIR_TYPED_PARAM_ULLONG,
reply.read_iops_sec) < 0)
goto endjob;
break;
case 5:
if (virTypedParameterAssign(param,
VIR_DOMAIN_BLOCK_IOTUNE_WRITE_IOPS_SEC,
VIR_TYPED_PARAM_ULLONG,
reply.write_iops_sec) < 0)
goto endjob;
break;
default:
break;
}
}
if (*nparams > QEMU_NB_BLOCK_IO_TUNE_PARAM)
*nparams = QEMU_NB_BLOCK_IO_TUNE_PARAM;
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
VIR_FREE(device);
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
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;
int i;
int n = 0;
virCheckFlags(0, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
priv = vm->privateData;
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);
qemuDomainObjExitMonitor(driver, vm);
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:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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 ATTRIBUTE_UNUSED,
const char *uri ATTRIBUTE_UNUSED,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr persistentDef;
int ret = -1;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
cfg = virQEMUDriverGetConfig(driver);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
switch ((virDomainMetadataType) type) {
case VIR_DOMAIN_METADATA_DESCRIPTION:
VIR_FREE(vm->def->description);
if (VIR_STRDUP(vm->def->description, metadata) < 0)
goto cleanup;
break;
case VIR_DOMAIN_METADATA_TITLE:
VIR_FREE(vm->def->title);
if (VIR_STRDUP(vm->def->title, metadata) < 0)
goto cleanup;
break;
case VIR_DOMAIN_METADATA_ELEMENT:
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEmu driver does not support modifying "
"<metadata> element"));
goto cleanup;
break;
default:
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("unknown metadata type"));
goto cleanup;
break;
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
switch ((virDomainMetadataType) type) {
case VIR_DOMAIN_METADATA_DESCRIPTION:
VIR_FREE(persistentDef->description);
if (VIR_STRDUP(persistentDef->description, metadata) < 0)
goto cleanup;
break;
case VIR_DOMAIN_METADATA_TITLE:
VIR_FREE(persistentDef->title);
if (VIR_STRDUP(persistentDef->title, metadata) < 0)
goto cleanup;
break;
case VIR_DOMAIN_METADATA_ELEMENT:
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU driver does not support "
"<metadata> element"));
goto cleanup;
default:
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("unknown metadata type"));
goto cleanup;
break;
}
if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
goto cleanup;
}
ret = 0;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
virObjectUnref(cfg);
return ret;
}
static char *
qemuDomainGetMetadata(virDomainPtr dom,
int type,
const char *uri ATTRIBUTE_UNUSED,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr def;
char *ret = NULL;
char *field = NULL;
virCapsPtr caps = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, NULL);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags, &def) < 0)
goto cleanup;
/* use correct domain definition according to flags */
if (flags & VIR_DOMAIN_AFFECT_LIVE)
def = vm->def;
switch ((virDomainMetadataType) type) {
case VIR_DOMAIN_METADATA_DESCRIPTION:
field = def->description;
break;
case VIR_DOMAIN_METADATA_TITLE:
field = def->title;
break;
case VIR_DOMAIN_METADATA_ELEMENT:
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU driver does not support "
"<metadata> element"));
goto cleanup;
break;
default:
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("unknown metadata type"));
goto cleanup;
break;
}
if (!field) {
virReportError(VIR_ERR_NO_DOMAIN_METADATA, "%s",
_("Requested metadata element is not present"));
goto cleanup;
}
ignore_value(VIR_STRDUP(ret, field));
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
return ret;
}
/* qemuDomainGetCPUStats() with start_cpu == -1 */
static int
qemuDomainGetTotalcpuStats(virDomainObjPtr vm,
virTypedParameterPtr params,
int nparams)
{
unsigned long long cpu_time;
int ret;
qemuDomainObjPrivatePtr priv = vm->privateData;
if (nparams == 0) /* return supported number of params */
return QEMU_NB_TOTAL_CPU_STAT_PARAM;
/* entry 0 is cputime */
ret = virCgroupGetCpuacctUsage(priv->cgroup, &cpu_time);
if (ret < 0) {
virReportSystemError(-ret, "%s", _("unable to get cpu account"));
return -1;
}
if (virTypedParameterAssign(&params[0], VIR_DOMAIN_CPU_STATS_CPUTIME,
VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
return -1;
if (nparams > 1) {
unsigned long long user;
unsigned long long sys;
ret = virCgroupGetCpuacctStat(priv->cgroup, &user, &sys);
if (ret < 0) {
virReportSystemError(-ret, "%s", _("unable to get cpu account"));
return -1;
}
if (virTypedParameterAssign(&params[1],
VIR_DOMAIN_CPU_STATS_USERTIME,
VIR_TYPED_PARAM_ULLONG, user) < 0)
return -1;
if (nparams > 2 &&
virTypedParameterAssign(&params[2],
VIR_DOMAIN_CPU_STATS_SYSTEMTIME,
VIR_TYPED_PARAM_ULLONG, sys) < 0)
return -1;
if (nparams > QEMU_NB_TOTAL_CPU_STAT_PARAM)
nparams = QEMU_NB_TOTAL_CPU_STAT_PARAM;
}
return nparams;
}
/* This function gets the sums of cpu time consumed by all vcpus.
* For example, if there are 4 physical cpus, and 2 vcpus in a domain,
* then for each vcpu, the cpuacct.usage_percpu looks like this:
* t0 t1 t2 t3
* and we have 2 groups of such data:
* v\p 0 1 2 3
* 0 t00 t01 t02 t03
* 1 t10 t11 t12 t13
* for each pcpu, the sum is cpu time consumed by all vcpus.
* s0 = t00 + t10
* s1 = t01 + t11
* s2 = t02 + t12
* s3 = t03 + t13
*/
static int
getSumVcpuPercpuStats(virDomainObjPtr vm,
unsigned long long *sum_cpu_time,
unsigned int num)
{
int ret = -1;
int i;
char *buf = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
virCgroupPtr group_vcpu = NULL;
for (i = 0; i < priv->nvcpupids; i++) {
char *pos;
unsigned long long tmp;
int j;
if (virCgroupNewVcpu(priv->cgroup, i, false, &group_vcpu) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("error accessing cgroup cpuacct for vcpu"));
goto cleanup;
}
if (virCgroupGetCpuacctPercpuUsage(group_vcpu, &buf) < 0)
goto cleanup;
pos = buf;
for (j = 0; j < num; j++) {
if (virStrToLong_ull(pos, &pos, 10, &tmp) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("cpuacct parse error"));
goto cleanup;
}
sum_cpu_time[j] += tmp;
}
virCgroupFree(&group_vcpu);
VIR_FREE(buf);
}
ret = 0;
cleanup:
virCgroupFree(&group_vcpu);
VIR_FREE(buf);
return ret;
}
static int
qemuDomainGetPercpuStats(virDomainObjPtr vm,
virTypedParameterPtr params,
unsigned int nparams,
int start_cpu,
unsigned int ncpus)
{
int rv = -1;
int i, id, max_id;
char *pos;
char *buf = NULL;
unsigned long long *sum_cpu_time = NULL;
unsigned long long *sum_cpu_pos;
unsigned int n = 0;
qemuDomainObjPrivatePtr priv = vm->privateData;
virTypedParameterPtr ent;
int param_idx;
unsigned long long cpu_time;
/* return the number of supported params */
if (nparams == 0 && ncpus != 0)
return QEMU_NB_PER_CPU_STAT_PARAM;
/* To parse account file, we need to know how many cpus are present. */
max_id = nodeGetCPUCount();
if (max_id < 0)
return rv;
if (ncpus == 0) { /* returns max cpu ID */
rv = max_id;
goto cleanup;
}
if (start_cpu > max_id) {
virReportError(VIR_ERR_INVALID_ARG,
_("start_cpu %d larger than maximum of %d"),
start_cpu, max_id);
goto cleanup;
}
/* we get percpu cputime accounting info. */
if (virCgroupGetCpuacctPercpuUsage(priv->cgroup, &buf))
goto cleanup;
pos = buf;
memset(params, 0, nparams * ncpus);
/* return percpu cputime in index 0 */
param_idx = 0;
/* number of cpus to compute */
if (start_cpu >= max_id - ncpus)
id = max_id - 1;
else
id = start_cpu + ncpus - 1;
for (i = 0; i <= id; i++) {
if (virStrToLong_ull(pos, &pos, 10, &cpu_time) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("cpuacct parse error"));
goto cleanup;
} else {
n++;
}
if (i < start_cpu)
continue;
ent = &params[(i - start_cpu) * nparams + param_idx];
if (virTypedParameterAssign(ent, VIR_DOMAIN_CPU_STATS_CPUTIME,
VIR_TYPED_PARAM_ULLONG, cpu_time) < 0)
goto cleanup;
}
/* return percpu vcputime in index 1 */
if (++param_idx >= nparams) {
rv = nparams;
goto cleanup;
}
if (VIR_ALLOC_N(sum_cpu_time, n) < 0) {
virReportOOMError();
goto cleanup;
}
if (getSumVcpuPercpuStats(vm, sum_cpu_time, n) < 0)
goto cleanup;
sum_cpu_pos = sum_cpu_time;
for (i = 0; i <= id; i++) {
cpu_time = *(sum_cpu_pos++);
if (i < start_cpu)
continue;
if (virTypedParameterAssign(&params[(i - start_cpu) * nparams +
param_idx],
VIR_DOMAIN_CPU_STATS_VCPUTIME,
VIR_TYPED_PARAM_ULLONG,
cpu_time) < 0)
goto cleanup;
}
rv = param_idx + 1;
cleanup:
VIR_FREE(sum_cpu_time);
VIR_FREE(buf);
return rv;
}
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;
bool isActive;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
if (!(vm = qemuDomObjFromDomain(domain)))
return -1;
priv = vm->privateData;
isActive = virDomainObjIsActive(vm);
if (!isActive) {
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 (start_cpu == -1)
ret = qemuDomainGetTotalcpuStats(vm, params, nparams);
else
ret = qemuDomainGetPercpuStats(vm, params, nparams,
start_cpu, ncpus);
cleanup:
if (vm)
virObjectUnlock(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;
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 (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
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 cleanup;
}
if (vm->def->pm.s3 || vm->def->pm.s4) {
if (vm->def->pm.s3 == VIR_DOMAIN_PM_STATE_DISABLED &&
(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 cleanup;
}
if (vm->def->pm.s4 == VIR_DOMAIN_PM_STATE_DISABLED &&
target == VIR_NODE_SUSPEND_TARGET_DISK) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("S4 state is disabled for this domain"));
goto cleanup;
}
}
if (priv->agentError) {
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not "
"available due to an error"));
goto cleanup;
}
if (!priv->agent) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
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;
}
qemuDomainObjEnterAgent(vm);
ret = qemuAgentSuspend(priv->agent, target);
qemuDomainObjExitAgent(vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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 (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);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(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);
ret = virDomainObjListExport(driver->domains, conn, domains, flags);
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;
qemuDomainObjPrivatePtr priv;
virCheckFlags(0, NULL);
if (!(vm = qemuDomObjFromDomain(domain)))
goto cleanup;
priv = vm->privateData;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (priv->agentError) {
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not "
"available due to an error"));
goto cleanup;
}
if (!priv->agent) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
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;
}
qemuDomainObjEnterAgent(vm);
ret = qemuAgentArbitraryCommand(priv->agent, cmd, &result, timeout);
qemuDomainObjExitAgent(vm);
if (ret < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to execute agent command"));
goto endjob;
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
}
cleanup:
if (vm)
virObjectUnlock(vm);
return result;
}
static int
qemuDomainFSTrim(virDomainPtr dom,
const char *mountPoint,
unsigned long long minimum,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
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;
priv = vm->privateData;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (!priv->agent) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
goto cleanup;
}
if (priv->agentError) {
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not "
"available due to an error"));
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;
}
qemuDomainObjEnterAgent(vm);
ret = qemuAgentFSTrim(priv->agent, minimum);
qemuDomainObjExitAgent(vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
return ret;
}
static int
qemuNodeGetInfo(virConnectPtr conn ATTRIBUTE_UNUSED,
virNodeInfoPtr nodeinfo)
{
return nodeGetInfo(nodeinfo);
}
static int
qemuNodeGetCPUStats(virConnectPtr conn ATTRIBUTE_UNUSED,
int cpuNum,
virNodeCPUStatsPtr params,
int *nparams,
unsigned int flags)
{
return nodeGetCPUStats(cpuNum, params, nparams, flags);
}
static int
qemuNodeGetMemoryStats(virConnectPtr conn ATTRIBUTE_UNUSED,
int cellNum,
virNodeMemoryStatsPtr params,
int *nparams,
unsigned int flags)
{
return nodeGetMemoryStats(cellNum, params, nparams, flags);
}
static int
qemuNodeGetCellsFreeMemory(virConnectPtr conn ATTRIBUTE_UNUSED,
unsigned long long *freeMems,
int startCell,
int maxCells)
{
return nodeGetCellsFreeMemory(freeMems, startCell, maxCells);
}
static unsigned long long
qemuNodeGetFreeMemory(virConnectPtr conn ATTRIBUTE_UNUSED)
{
return nodeGetFreeMemory();
}
static int
qemuNodeGetMemoryParameters(virConnectPtr conn ATTRIBUTE_UNUSED,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
return nodeGetMemoryParameters(params, nparams, flags);
}
static int
qemuNodeSetMemoryParameters(virConnectPtr conn ATTRIBUTE_UNUSED,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
return nodeSetMemoryParameters(params, nparams, flags);
}
static int
qemuNodeGetCPUMap(virConnectPtr conn ATTRIBUTE_UNUSED,
unsigned char **cpumap,
unsigned int *online,
unsigned int flags)
{
return nodeGetCPUMap(cpumap, online, flags);
}
static int
qemuNodeSuspendForDuration(virConnectPtr conn ATTRIBUTE_UNUSED,
unsigned int target,
unsigned long long duration,
unsigned int flags)
{
return nodeSuspendForDuration(target, duration, flags);
}
static virDriver qemuDriver = {
.no = VIR_DRV_QEMU,
.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 */
.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 */
.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 */
.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 */
.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 */
.domainOpenConsole = qemuDomainOpenConsole, /* 0.8.6 */
.domainOpenGraphics = qemuDomainOpenGraphics, /* 0.9.7 */
.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 */
.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 */
.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 */
};
static virStateDriver qemuStateDriver = {
.name = "QEMU",
.stateInitialize = qemuStateInitialize,
.stateCleanup = qemuStateCleanup,
.stateReload = qemuStateReload,
.stateStop = qemuStateStop,
};
int qemuRegister(void) {
virRegisterDriver(&qemuDriver);
virRegisterStateDriver(&qemuStateDriver);
return 0;
}
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