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0436d328f5
libvirt/src/qemu/qemu_driver.c
Eric Blake 0436d328f5 snapshot: wire up qemu transaction command 
The hardest part about adding transactions is not using the new
monitor command, but undoing the partial changes we made prior
to a failed transaction.

* src/qemu/qemu_driver.c (qemuDomainSnapshotCreateDiskActive): Use
transaction when available.
(qemuDomainSnapshotUndoSingleDiskActive): New function.
(qemuDomainSnapshotCreateSingleDiskActive): Pass through actions.
(qemuDomainSnapshotCreateXML): Adjust caller.
2012-03-23 16:38:20 -06:00

12819 lines
405 KiB
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/*
* qemu_driver.c: core driver methods for managing qemu guests
*
* Copyright (C) 2006-2012 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* 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/utsname.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <paths.h>
#include <stdio.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 "virterror_internal.h"
#include "logging.h"
#include "datatypes.h"
#include "buf.h"
#include "util.h"
#include "nodeinfo.h"
#include "stats_linux.h"
#include "capabilities.h"
#include "memory.h"
#include "uuid.h"
#include "domain_conf.h"
#include "domain_audit.h"
#include "node_device_conf.h"
#include "pci.h"
#include "hostusb.h"
#include "processinfo.h"
#include "libvirt_internal.h"
#include "xml.h"
#include "cpu/cpu.h"
#include "sysinfo.h"
#include "domain_nwfilter.h"
#include "hooks.h"
#include "storage_file.h"
#include "virfile.h"
#include "fdstream.h"
#include "configmake.h"
#include "threadpool.h"
#include "locking/lock_manager.h"
#include "locking/domain_lock.h"
#include "virkeycode.h"
#include "virnodesuspend.h"
#include "virtime.h"
#include "virtypedparam.h"
#define VIR_FROM_THIS VIR_FROM_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 1
#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 qemudShutdown(void);
static int qemuDomainObjStart(virConnectPtr conn,
struct qemud_driver *driver,
virDomainObjPtr vm,
unsigned int flags);
static int qemudDomainGetMaxVcpus(virDomainPtr dom);
struct qemud_driver *qemu_driver = NULL;
struct qemuAutostartData {
struct qemud_driver *driver;
virConnectPtr conn;
};
static void
qemuAutostartDomain(void *payload, const void *name ATTRIBUTE_UNUSED,
void *opaque)
{
virDomainObjPtr vm = payload;
struct qemuAutostartData *data = opaque;
virErrorPtr err;
int flags = 0;
if (data->driver->autoStartBypassCache)
flags |= VIR_DOMAIN_START_BYPASS_CACHE;
virDomainObjLock(vm);
virResetLastError();
if (vm->autostart &&
!virDomainObjIsActive(vm)) {
if (qemuDomainObjBeginJobWithDriver(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;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
}
static void
qemuAutostartDomains(struct qemud_driver *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(driver->privileged ?
"qemu:///system" :
"qemu:///session");
/* Ignoring NULL conn which is mostly harmless here */
struct qemuAutostartData data = { driver, conn };
qemuDriverLock(driver);
virHashForEach(driver->domains.objs, qemuAutostartDomain, &data);
qemuDriverUnlock(driver);
if (conn)
virConnectClose(conn);
}
static int
qemuSecurityInit(struct qemud_driver *driver)
{
virSecurityManagerPtr mgr = virSecurityManagerNew(driver->securityDriverName,
driver->allowDiskFormatProbing,
driver->securityDefaultConfined,
driver->securityRequireConfined);
if (!mgr)
goto error;
if (driver->privileged) {
virSecurityManagerPtr dac = virSecurityManagerNewDAC(driver->user,
driver->group,
driver->allowDiskFormatProbing,
driver->securityDefaultConfined,
driver->securityRequireConfined,
driver->dynamicOwnership);
if (!dac)
goto error;
if (!(driver->securityManager = virSecurityManagerNewStack(mgr,
dac))) {
virSecurityManagerFree(dac);
goto error;
}
} else {
driver->securityManager = mgr;
}
return 0;
error:
VIR_ERROR(_("Failed to initialize security drivers"));
virSecurityManagerFree(mgr);
return -1;
}
static virCapsPtr
qemuCreateCapabilities(virCapsPtr oldcaps,
struct qemud_driver *driver)
{
virCapsPtr caps;
/* Basic host arch / guest machine capabilities */
if (!(caps = qemuCapsInit(oldcaps))) {
virReportOOMError();
return NULL;
}
if (driver->allowDiskFormatProbing) {
caps->defaultDiskDriverName = NULL;
caps->defaultDiskDriverType = NULL;
} else {
caps->defaultDiskDriverName = "qemu";
caps->defaultDiskDriverType = "raw";
}
qemuDomainSetPrivateDataHooks(caps);
qemuDomainSetNamespaceHooks(caps);
if (virGetHostUUID(caps->host.host_uuid)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("cannot get the host uuid"));
goto err_exit;
}
/* Security driver data */
const char *doi, *model;
doi = virSecurityManagerGetDOI(driver->securityManager);
model = virSecurityManagerGetModel(driver->securityManager);
if (STRNEQ(model, "none")) {
if (!(caps->host.secModel.model = strdup(model)))
goto no_memory;
if (!(caps->host.secModel.doi = strdup(doi)))
goto no_memory;
}
VIR_DEBUG("Initialized caps for security driver \"%s\" with "
"DOI \"%s\"", model, doi);
return caps;
no_memory:
virReportOOMError();
err_exit:
virCapabilitiesFree(caps);
return NULL;
}
static void qemuDomainSnapshotLoad(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *data)
{
virDomainObjPtr vm = (virDomainObjPtr)payload;
char *baseDir = (char *)data;
char *snapDir = NULL;
DIR *dir = NULL;
struct dirent *entry;
char *xmlStr;
int ret;
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);
virDomainObjLock(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;
}
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;
}
ret = virFileReadAll(fullpath, 1024*1024*1, &xmlStr);
if (ret < 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, qemu_driver->caps,
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();
cleanup:
if (dir)
closedir(dir);
VIR_FREE(snapDir);
virDomainObjUnlock(vm);
}
/**
* qemudStartup:
*
* Initialization function for the QEmu daemon
*/
static int
qemudStartup(int privileged) {
char *base = NULL;
char *driverConf = NULL;
int rc;
virConnectPtr conn = NULL;
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;
}
qemuDriverLock(qemu_driver);
qemu_driver->privileged = privileged;
/* Don't have a dom0 so start from 1 */
qemu_driver->nextvmid = 1;
if (virDomainObjListInit(&qemu_driver->domains) < 0)
goto out_of_memory;
/* Init domain events */
qemu_driver->domainEventState = virDomainEventStateNew();
if (!qemu_driver->domainEventState)
goto error;
/* Allocate bitmap for vnc port reservation */
if ((qemu_driver->reservedVNCPorts =
virBitmapAlloc(QEMU_VNC_PORT_MAX - QEMU_VNC_PORT_MIN)) == NULL)
goto out_of_memory;
/* read the host sysinfo */
if (privileged)
qemu_driver->hostsysinfo = virSysinfoRead();
if (privileged) {
if (virAsprintf(&qemu_driver->logDir,
"%s/log/libvirt/qemu", LOCALSTATEDIR) == -1)
goto out_of_memory;
if ((base = strdup (SYSCONFDIR "/libvirt")) == NULL)
goto out_of_memory;
if (virAsprintf(&qemu_driver->stateDir,
"%s/run/libvirt/qemu", LOCALSTATEDIR) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->libDir,
"%s/lib/libvirt/qemu", LOCALSTATEDIR) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->cacheDir,
"%s/cache/libvirt/qemu", LOCALSTATEDIR) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->saveDir,
"%s/lib/libvirt/qemu/save", LOCALSTATEDIR) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->snapshotDir,
"%s/lib/libvirt/qemu/snapshot", LOCALSTATEDIR) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->autoDumpPath,
"%s/lib/libvirt/qemu/dump", LOCALSTATEDIR) == -1)
goto out_of_memory;
} else {
uid_t uid = geteuid();
char *userdir = virGetUserDirectory(uid);
if (!userdir)
goto error;
if (virAsprintf(&qemu_driver->logDir,
"%s/.libvirt/qemu/log", userdir) == -1) {
VIR_FREE(userdir);
goto out_of_memory;
}
if (virAsprintf(&base, "%s/.libvirt", userdir) == -1) {
VIR_FREE(userdir);
goto out_of_memory;
}
VIR_FREE(userdir);
if (virAsprintf(&qemu_driver->stateDir, "%s/qemu/run", base) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->libDir, "%s/qemu/lib", base) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->cacheDir, "%s/qemu/cache", base) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->saveDir, "%s/qemu/save", base) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->snapshotDir, "%s/qemu/snapshot", base) == -1)
goto out_of_memory;
if (virAsprintf(&qemu_driver->autoDumpPath, "%s/qemu/dump", base) == -1)
goto out_of_memory;
}
if (virFileMakePath(qemu_driver->stateDir) < 0) {
char ebuf[1024];
VIR_ERROR(_("Failed to create state dir '%s': %s"),
qemu_driver->stateDir, virStrerror(errno, ebuf, sizeof ebuf));
goto error;
}
if (virFileMakePath(qemu_driver->libDir) < 0) {
char ebuf[1024];
VIR_ERROR(_("Failed to create lib dir '%s': %s"),
qemu_driver->libDir, virStrerror(errno, ebuf, sizeof ebuf));
goto error;
}
if (virFileMakePath(qemu_driver->cacheDir) < 0) {
char ebuf[1024];
VIR_ERROR(_("Failed to create cache dir '%s': %s"),
qemu_driver->cacheDir, virStrerror(errno, ebuf, sizeof ebuf));
goto error;
}
if (virFileMakePath(qemu_driver->saveDir) < 0) {
char ebuf[1024];
VIR_ERROR(_("Failed to create save dir '%s': %s"),
qemu_driver->saveDir, virStrerror(errno, ebuf, sizeof ebuf));
goto error;
}
if (virFileMakePath(qemu_driver->snapshotDir) < 0) {
char ebuf[1024];
VIR_ERROR(_("Failed to create save dir '%s': %s"),
qemu_driver->snapshotDir, virStrerror(errno, ebuf, sizeof ebuf));
goto error;
}
if (virFileMakePath(qemu_driver->autoDumpPath) < 0) {
char ebuf[1024];
VIR_ERROR(_("Failed to create dump dir '%s': %s"),
qemu_driver->autoDumpPath, virStrerror(errno, ebuf, sizeof ebuf));
goto error;
}
/* Configuration paths are either ~/.libvirt/qemu/... (session) or
* /etc/libvirt/qemu/... (system).
*/
if (virAsprintf(&driverConf, "%s/qemu.conf", base) < 0 ||
virAsprintf(&qemu_driver->configDir, "%s/qemu", base) < 0 ||
virAsprintf(&qemu_driver->autostartDir, "%s/qemu/autostart", base) < 0)
goto out_of_memory;
VIR_FREE(base);
rc = virCgroupForDriver("qemu", &qemu_driver->cgroup, privileged, 1);
if (rc < 0) {
char buf[1024];
VIR_INFO("Unable to create cgroup for driver: %s",
virStrerror(-rc, buf, sizeof(buf)));
}
if (qemudLoadDriverConfig(qemu_driver, driverConf) < 0) {
goto error;
}
VIR_FREE(driverConf);
/* We should always at least have the 'nop' manager, so
* NULLs here are a fatal error
*/
if (!qemu_driver->lockManager) {
VIR_ERROR(_("Missing lock manager implementation"));
goto error;
}
if (qemuSecurityInit(qemu_driver) < 0)
goto error;
if ((qemu_driver->caps = qemuCreateCapabilities(NULL,
qemu_driver)) == NULL)
goto error;
if ((qemu_driver->activePciHostdevs = pciDeviceListNew()) == NULL)
goto error;
if ((qemu_driver->activeUsbHostdevs = usbDeviceListNew()) == NULL)
goto error;
if ((qemu_driver->inactivePciHostdevs = pciDeviceListNew()) == NULL)
goto error;
if (privileged) {
if (chown(qemu_driver->libDir, qemu_driver->user, qemu_driver->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to user %d:%d"),
qemu_driver->libDir, qemu_driver->user, qemu_driver->group);
goto error;
}
if (chown(qemu_driver->cacheDir, qemu_driver->user, qemu_driver->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
qemu_driver->cacheDir, qemu_driver->user, qemu_driver->group);
goto error;
}
if (chown(qemu_driver->saveDir, qemu_driver->user, qemu_driver->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
qemu_driver->saveDir, qemu_driver->user, qemu_driver->group);
goto error;
}
if (chown(qemu_driver->snapshotDir, qemu_driver->user, qemu_driver->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership of '%s' to %d:%d"),
qemu_driver->snapshotDir, qemu_driver->user, qemu_driver->group);
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 (qemu_driver->hugetlbfs_mount &&
qemu_driver->hugetlbfs_mount[0] == '/') {
char *mempath = NULL;
if (virAsprintf(&mempath, "%s/libvirt/qemu", qemu_driver->hugetlbfs_mount) < 0)
goto out_of_memory;
if (virFileMakePath(mempath) < 0) {
virReportSystemError(errno,
_("unable to create hugepage path %s"), mempath);
VIR_FREE(mempath);
goto error;
}
if (qemu_driver->privileged &&
chown(mempath, qemu_driver->user, qemu_driver->group) < 0) {
virReportSystemError(errno,
_("unable to set ownership on %s to %d:%d"),
mempath, qemu_driver->user, qemu_driver->group);
VIR_FREE(mempath);
goto error;
}
qemu_driver->hugepage_path = mempath;
}
if (qemuDriverCloseCallbackInit(qemu_driver) < 0)
goto error;
/* Get all the running persistent or transient configs first */
if (virDomainLoadAllConfigs(qemu_driver->caps,
&qemu_driver->domains,
qemu_driver->stateDir,
NULL,
1, QEMU_EXPECTED_VIRT_TYPES,
NULL, NULL) < 0)
goto error;
conn = virConnectOpen(qemu_driver->privileged ?
"qemu:///system" :
"qemu:///session");
qemuProcessReconnectAll(conn, qemu_driver);
/* Then inactive persistent configs */
if (virDomainLoadAllConfigs(qemu_driver->caps,
&qemu_driver->domains,
qemu_driver->configDir,
qemu_driver->autostartDir,
0, QEMU_EXPECTED_VIRT_TYPES,
NULL, NULL) < 0)
goto error;
virHashForEach(qemu_driver->domains.objs, qemuDomainSnapshotLoad,
qemu_driver->snapshotDir);
qemu_driver->workerPool = virThreadPoolNew(0, 1, 0, processWatchdogEvent, qemu_driver);
if (!qemu_driver->workerPool)
goto error;
qemuDriverUnlock(qemu_driver);
qemuAutostartDomains(qemu_driver);
if (conn)
virConnectClose(conn);
return 0;
out_of_memory:
virReportOOMError();
error:
if (qemu_driver)
qemuDriverUnlock(qemu_driver);
if (conn)
virConnectClose(conn);
VIR_FREE(base);
VIR_FREE(driverConf);
qemudShutdown();
return -1;
}
static void qemudNotifyLoadDomain(virDomainObjPtr vm, int newVM, void *opaque)
{
struct qemud_driver *driver = opaque;
if (newVM) {
virDomainEventPtr event =
virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
VIR_DOMAIN_EVENT_DEFINED_ADDED);
if (event)
qemuDomainEventQueue(driver, event);
}
}
/**
* qemudReload:
*
* Function to restart the QEmu daemon, it will recheck the configuration
* files and update its state and the networking
*/
static int
qemudReload(void) {
if (!qemu_driver)
return 0;
qemuDriverLock(qemu_driver);
virDomainLoadAllConfigs(qemu_driver->caps,
&qemu_driver->domains,
qemu_driver->configDir,
qemu_driver->autostartDir,
0, QEMU_EXPECTED_VIRT_TYPES,
qemudNotifyLoadDomain, qemu_driver);
qemuDriverUnlock(qemu_driver);
qemuAutostartDomains(qemu_driver);
return 0;
}
/**
* qemudActive:
*
* Checks if the QEmu daemon is active, i.e. has an active domain or
* an active network
*
* Returns 1 if active, 0 otherwise
*/
static int
qemudActive(void) {
int active = 0;
if (!qemu_driver)
return 0;
/* XXX having to iterate here is not great because it requires many locks */
qemuDriverLock(qemu_driver);
active = virDomainObjListNumOfDomains(&qemu_driver->domains, 1);
qemuDriverUnlock(qemu_driver);
return active;
}
/**
* qemudShutdown:
*
* Shutdown the QEmu daemon, it will stop all active domains and networks
*/
static int
qemudShutdown(void) {
int i;
if (!qemu_driver)
return -1;
qemuDriverLock(qemu_driver);
pciDeviceListFree(qemu_driver->activePciHostdevs);
pciDeviceListFree(qemu_driver->inactivePciHostdevs);
usbDeviceListFree(qemu_driver->activeUsbHostdevs);
virCapabilitiesFree(qemu_driver->caps);
virDomainObjListDeinit(&qemu_driver->domains);
virBitmapFree(qemu_driver->reservedVNCPorts);
virSysinfoDefFree(qemu_driver->hostsysinfo);
qemuDriverCloseCallbackShutdown(qemu_driver);
VIR_FREE(qemu_driver->configDir);
VIR_FREE(qemu_driver->autostartDir);
VIR_FREE(qemu_driver->logDir);
VIR_FREE(qemu_driver->stateDir);
VIR_FREE(qemu_driver->libDir);
VIR_FREE(qemu_driver->cacheDir);
VIR_FREE(qemu_driver->saveDir);
VIR_FREE(qemu_driver->snapshotDir);
VIR_FREE(qemu_driver->qemuImgBinary);
VIR_FREE(qemu_driver->autoDumpPath);
VIR_FREE(qemu_driver->vncTLSx509certdir);
VIR_FREE(qemu_driver->vncListen);
VIR_FREE(qemu_driver->vncPassword);
VIR_FREE(qemu_driver->vncSASLdir);
VIR_FREE(qemu_driver->spiceTLSx509certdir);
VIR_FREE(qemu_driver->spiceListen);
VIR_FREE(qemu_driver->spicePassword);
VIR_FREE(qemu_driver->hugetlbfs_mount);
VIR_FREE(qemu_driver->hugepage_path);
VIR_FREE(qemu_driver->saveImageFormat);
VIR_FREE(qemu_driver->dumpImageFormat);
virSecurityManagerFree(qemu_driver->securityManager);
ebtablesContextFree(qemu_driver->ebtables);
if (qemu_driver->cgroupDeviceACL) {
for (i = 0 ; qemu_driver->cgroupDeviceACL[i] != NULL ; i++)
VIR_FREE(qemu_driver->cgroupDeviceACL[i]);
VIR_FREE(qemu_driver->cgroupDeviceACL);
}
/* Free domain callback list */
virDomainEventStateFree(qemu_driver->domainEventState);
virCgroupFree(&qemu_driver->cgroup);
virLockManagerPluginUnref(qemu_driver->lockManager);
qemuDriverUnlock(qemu_driver);
virMutexDestroy(&qemu_driver->lock);
virThreadPoolFree(qemu_driver->workerPool);
VIR_FREE(qemu_driver);
return 0;
}
static virDrvOpenStatus qemudOpen(virConnectPtr conn,
virConnectAuthPtr auth ATTRIBUTE_UNUSED,
unsigned int flags)
{
virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
if (conn->uri == NULL) {
if (qemu_driver == NULL)
return VIR_DRV_OPEN_DECLINED;
if (!(conn->uri = virURIParse(qemu_driver->privileged ?
"qemu:///system" :
"qemu:///session")))
return VIR_DRV_OPEN_ERROR;
} else {
/* If URI isn't 'qemu' its definitely not for us */
if (conn->uri->scheme == NULL ||
STRNEQ(conn->uri->scheme, "qemu"))
return VIR_DRV_OPEN_DECLINED;
/* Allow remote driver to deal with URIs with hostname server */
if (conn->uri->server != NULL)
return VIR_DRV_OPEN_DECLINED;
if (qemu_driver == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("qemu state driver is not active"));
return VIR_DRV_OPEN_ERROR;
}
if (conn->uri->path == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("no QEMU URI path given, try %s"),
qemu_driver->privileged
? "qemu:///system"
: "qemu:///session");
return VIR_DRV_OPEN_ERROR;
}
if (qemu_driver->privileged) {
if (STRNEQ (conn->uri->path, "/system") &&
STRNEQ (conn->uri->path, "/session")) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected QEMU URI path '%s', try qemu:///system"),
conn->uri->path);
return VIR_DRV_OPEN_ERROR;
}
} else {
if (STRNEQ (conn->uri->path, "/session")) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected QEMU URI path '%s', try qemu:///session"),
conn->uri->path);
return VIR_DRV_OPEN_ERROR;
}
}
}
conn->privateData = qemu_driver;
return VIR_DRV_OPEN_SUCCESS;
}
static int qemudClose(virConnectPtr conn) {
struct qemud_driver *driver = conn->privateData;
/* Get rid of callbacks registered for this conn */
qemuDriverLock(driver);
virDomainEventStateDeregisterConn(conn,
driver->domainEventState);
qemuDriverCloseCallbackRunAll(driver, conn);
qemuDriverUnlock(driver);
conn->privateData = NULL;
return 0;
}
/* Which features are supported by this driver? */
static int
qemudSupportsFeature (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:
return 1;
default:
return 0;
}
}
static const char *qemudGetType(virConnectPtr conn ATTRIBUTE_UNUSED) {
return "QEMU";
}
static int qemuIsSecure(virConnectPtr conn ATTRIBUTE_UNUSED)
{
/* Trivially secure, since always inside the daemon */
return 1;
}
static int qemuIsEncrypted(virConnectPtr conn ATTRIBUTE_UNUSED)
{
/* Not encrypted, but remote driver takes care of that */
return 0;
}
static int qemuIsAlive(virConnectPtr conn ATTRIBUTE_UNUSED)
{
return 1;
}
static int kvmGetMaxVCPUs(void) {
int maxvcpus = 1;
int r, fd;
fd = open(KVM_DEVICE, O_RDONLY);
if (fd < 0) {
virReportSystemError(errno, _("Unable to open %s"), KVM_DEVICE);
return -1;
}
r = ioctl(fd, KVM_CHECK_EXTENSION, KVM_CAP_NR_VCPUS);
if (r > 0)
maxvcpus = r;
VIR_FORCE_CLOSE(fd);
return maxvcpus;
}
static char *
qemuGetSysinfo(virConnectPtr conn, unsigned int flags)
{
struct qemud_driver *driver = conn->privateData;
virBuffer buf = VIR_BUFFER_INITIALIZER;
virCheckFlags(0, NULL);
if (!driver->hostsysinfo) {
qemuReportError(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 qemudGetMaxVCPUs(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;
qemuReportError(VIR_ERR_INVALID_ARG,
_("unknown type '%s'"), type);
return -1;
}
static char *qemudGetCapabilities(virConnectPtr conn) {
struct qemud_driver *driver = conn->privateData;
virCapsPtr caps = NULL;
char *xml = NULL;
qemuDriverLock(driver);
if ((caps = qemuCreateCapabilities(qemu_driver->caps,
qemu_driver)) == NULL) {
virCapabilitiesFree(caps);
goto cleanup;
}
virCapabilitiesFree(qemu_driver->caps);
qemu_driver->caps = caps;
if ((xml = virCapabilitiesFormatXML(driver->caps)) == NULL)
virReportOOMError();
cleanup:
qemuDriverUnlock(driver);
return xml;
}
static int
qemudGetProcessInfo(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 qemudDomainLookupByID(virConnectPtr conn,
int id) {
struct qemud_driver *driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
qemuDriverLock(driver);
vm = virDomainFindByID(&driver->domains, id);
qemuDriverUnlock(driver);
if (!vm) {
qemuReportError(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)
virDomainObjUnlock(vm);
return dom;
}
static virDomainPtr qemudDomainLookupByUUID(virConnectPtr conn,
const unsigned char *uuid) {
struct qemud_driver *driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(uuid, uuidstr);
qemuReportError(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)
virDomainObjUnlock(vm);
return dom;
}
static virDomainPtr qemudDomainLookupByName(virConnectPtr conn,
const char *name) {
struct qemud_driver *driver = conn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
qemuDriverLock(driver);
vm = virDomainFindByName(&driver->domains, name);
qemuDriverUnlock(driver);
if (!vm) {
qemuReportError(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)
virDomainObjUnlock(vm);
return dom;
}
static int qemuDomainIsActive(virDomainPtr dom)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr obj;
int ret = -1;
qemuDriverLock(driver);
obj = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!obj) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
ret = virDomainObjIsActive(obj);
cleanup:
if (obj)
virDomainObjUnlock(obj);
return ret;
}
static int qemuDomainIsPersistent(virDomainPtr dom)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr obj;
int ret = -1;
qemuDriverLock(driver);
obj = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!obj) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
ret = obj->persistent;
cleanup:
if (obj)
virDomainObjUnlock(obj);
return ret;
}
static int qemuDomainIsUpdated(virDomainPtr dom)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr obj;
int ret = -1;
qemuDriverLock(driver);
obj = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!obj) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
ret = obj->updated;
cleanup:
if (obj)
virDomainObjUnlock(obj);
return ret;
}
static int qemudGetVersion(virConnectPtr conn, unsigned long *version) {
struct qemud_driver *driver = conn->privateData;
int ret = -1;
qemuDriverLock(driver);
if (qemuCapsExtractVersion(driver->caps, &driver->qemuVersion) < 0)
goto cleanup;
*version = driver->qemuVersion;
ret = 0;
cleanup:
qemuDriverUnlock(driver);
return ret;
}
static int qemudListDomains(virConnectPtr conn, int *ids, int nids) {
struct qemud_driver *driver = conn->privateData;
int n;
qemuDriverLock(driver);
n = virDomainObjListGetActiveIDs(&driver->domains, ids, nids);
qemuDriverUnlock(driver);
return n;
}
static int qemudNumDomains(virConnectPtr conn) {
struct qemud_driver *driver = conn->privateData;
int n;
qemuDriverLock(driver);
n = virDomainObjListNumOfDomains(&driver->domains, 1);
qemuDriverUnlock(driver);
return n;
}
static virDomainPtr qemudDomainCreate(virConnectPtr conn, const char *xml,
unsigned int flags) {
struct qemud_driver *driver = conn->privateData;
virDomainDefPtr def;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
virDomainEventPtr event = NULL;
virDomainEventPtr event2 = NULL;
virCheckFlags(VIR_DOMAIN_START_PAUSED |
VIR_DOMAIN_START_AUTODESTROY, NULL);
qemuDriverLock(driver);
if (!(def = virDomainDefParseString(driver->caps, xml,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (virSecurityManagerVerify(driver->securityManager, def) < 0)
goto cleanup;
if (virDomainObjIsDuplicate(&driver->domains, def, 1) < 0)
goto cleanup;
if (qemudCanonicalizeMachine(driver, def) < 0)
goto cleanup;
if (qemuDomainAssignAddresses(def) < 0)
goto cleanup;
if (!(vm = virDomainAssignDef(driver->caps,
&driver->domains,
def, false)))
goto cleanup;
def = NULL;
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup; /* XXXX free the 'vm' we created ? */
if (qemuProcessStart(conn, driver, vm, NULL, true,
(flags & VIR_DOMAIN_START_PAUSED) != 0,
(flags & VIR_DOMAIN_START_AUTODESTROY) != 0,
-1, NULL, NULL, VIR_NETDEV_VPORT_PROFILE_OP_CREATE) < 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)
virDomainObjUnlock(vm);
if (event) {
qemuDomainEventQueue(driver, event);
if (event2)
qemuDomainEventQueue(driver, event2);
}
qemuDriverUnlock(driver);
return dom;
}
static int qemudDomainSuspend(virDomainPtr dom) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virDomainEventPtr event = NULL;
qemuDomainObjPrivatePtr priv;
virDomainPausedReason reason;
int eventDetail;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
priv = vm->privateData;
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_OUT) {
reason = VIR_DOMAIN_PAUSED_MIGRATION;
eventDetail = VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED;
} else {
reason = VIR_DOMAIN_PAUSED_USER;
eventDetail = VIR_DOMAIN_EVENT_SUSPENDED_PAUSED;
}
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_SUSPEND) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (virDomainObjGetState(vm, NULL) != VIR_DOMAIN_PAUSED) {
if (qemuProcessStopCPUs(driver, vm, reason, QEMU_ASYNC_JOB_NONE) < 0) {
goto endjob;
}
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_SUSPENDED,
eventDetail);
}
if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0)
goto endjob;
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
return ret;
}
static int qemudDomainResume(virDomainPtr dom) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virDomainEventPtr event = NULL;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_PAUSED) {
if (qemuProcessStartCPUs(driver, vm, dom->conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_NONE) < 0) {
if (virGetLastError() == NULL)
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("resume operation failed"));
goto endjob;
}
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
VIR_DOMAIN_EVENT_RESUMED_UNPAUSED);
}
if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0)
goto endjob;
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
return ret;
}
static int qemuDomainShutdownFlags(virDomainPtr dom, unsigned int flags) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool useAgent = false;
virCheckFlags(VIR_DOMAIN_SHUTDOWN_ACPI_POWER_BTN |
VIR_DOMAIN_SHUTDOWN_GUEST_AGENT, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
if ((flags & VIR_DOMAIN_SHUTDOWN_GUEST_AGENT) ||
(!(flags & VIR_DOMAIN_SHUTDOWN_ACPI_POWER_BTN) &&
priv->agent))
useAgent = true;
if (useAgent) {
if (priv->agentError) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("QEMU guest agent is not available due to an error"));
goto cleanup;
}
if (!priv->agent) {
qemuReportError(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)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (useAgent) {
qemuDomainObjEnterAgent(driver, vm);
ret = qemuAgentShutdown(priv->agent, QEMU_AGENT_SHUTDOWN_POWERDOWN);
qemuDomainObjExitAgent(driver, vm);
} else {
qemuDomainSetFakeReboot(driver, vm, false);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemPowerdown(priv->mon);
qemuDomainObjExitMonitor(driver, vm);
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int qemuDomainShutdown(virDomainPtr dom) {
return qemuDomainShutdownFlags(dom, 0);
}
static int qemuDomainReboot(virDomainPtr dom, unsigned int flags) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool useAgent = false;
virCheckFlags(VIR_DOMAIN_SHUTDOWN_ACPI_POWER_BTN |
VIR_DOMAIN_SHUTDOWN_GUEST_AGENT , -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
if ((flags & VIR_DOMAIN_SHUTDOWN_GUEST_AGENT) ||
(!(flags & VIR_DOMAIN_SHUTDOWN_ACPI_POWER_BTN) &&
priv->agent))
useAgent = true;
if (useAgent) {
if (priv->agentError) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("QEMU guest agent is not available due to an error"));
goto cleanup;
}
if (!priv->agent) {
qemuReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
goto cleanup;
}
} else {
#if HAVE_YAJL
if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_MONITOR_JSON)) {
if (!qemuCapsGet(priv->qemuCaps, QEMU_CAPS_NO_SHUTDOWN)) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Reboot is not supported with this QEMU binary"));
goto cleanup;
}
} else {
#endif
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Reboot is not supported without the JSON monitor"));
goto cleanup;
#if HAVE_YAJL
}
#endif
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (useAgent) {
qemuDomainObjEnterAgent(driver, vm);
ret = qemuAgentShutdown(priv->agent, QEMU_AGENT_SHUTDOWN_REBOOT);
qemuDomainObjExitAgent(driver, vm);
} else {
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorSystemPowerdown(priv->mon);
qemuDomainObjExitMonitor(driver, vm);
if (ret == 0)
qemuDomainSetFakeReboot(driver, vm, true);
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainReset(virDomainPtr dom, unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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)
virDomainObjUnlock(vm);
return ret;
}
/* Count how many snapshots in a set have external disk snapshots. */
static void
qemuDomainSnapshotCountExternal(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *data)
{
virDomainSnapshotObjPtr snap = payload;
int *count = data;
if (snap->def->state == VIR_DOMAIN_DISK_SNAPSHOT)
(*count)++;
}
static int
qemuDomainDestroyFlags(virDomainPtr dom,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virDomainEventPtr event = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_DESTROY_GRACEFUL, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
qemuDomainSetFakeReboot(driver, vm, false);
/* 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(driver, vm, 0) < 0) {
qemuReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("failed to kill qemu process with SIGTERM"));
goto cleanup;
}
} else {
ignore_value(qemuProcessKill(driver, vm, VIR_QEMU_PROCESS_KILL_FORCE));
}
/* We need to prevent monitor EOF callback from doing our work (and sending
* misleading events) while the vm is unlocked inside BeginJob API
*/
priv->beingDestroyed = true;
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_DESTROY) < 0)
goto cleanup;
priv->beingDestroyed = false;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuProcessStop(driver, vm, 0, VIR_DOMAIN_SHUTOFF_DESTROYED);
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)
virDomainObjUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainDestroy(virDomainPtr dom)
{
return qemuDomainDestroyFlags(dom, 0);
}
static char *qemudDomainGetOSType(virDomainPtr dom) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
char *type = NULL;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!(type = strdup(vm->def->os.type)))
virReportOOMError();
cleanup:
if (vm)
virDomainObjUnlock(vm);
return type;
}
/* Returns max memory in kb, 0 if error */
static unsigned long long
qemuDomainGetMaxMemory(virDomainPtr dom)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
unsigned long long ret = 0;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
ret = vm->def->mem.max_balloon;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int qemudDomainSetMemoryFlags(virDomainPtr dom, unsigned long newmem,
unsigned int flags) {
struct qemud_driver *driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm;
virDomainDefPtr persistentDef = NULL;
int ret = -1, r;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_MEM_MAXIMUM, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto endjob;
if (flags & VIR_DOMAIN_MEM_MAXIMUM) {
/* resize the maximum memory */
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
qemuReportError(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(driver->configDir, persistentDef);
goto endjob;
}
} else {
/* resize the current memory */
if (newmem > vm->def->mem.max_balloon) {
qemuReportError(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) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot set memory of an active domain"));
goto endjob;
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
sa_assert(persistentDef);
persistentDef->mem.cur_balloon = newmem;
ret = virDomainSaveConfig(driver->configDir, persistentDef);
goto endjob;
}
}
ret = 0;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int qemudDomainSetMemory(virDomainPtr dom, unsigned long newmem)
{
return qemudDomainSetMemoryFlags(dom, newmem, VIR_DOMAIN_AFFECT_LIVE);
}
static int qemudDomainSetMaxMemory(virDomainPtr dom, unsigned long memory)
{
return qemudDomainSetMemoryFlags(dom, memory, VIR_DOMAIN_MEM_MAXIMUM);
}
static int qemuDomainInjectNMI(virDomainPtr domain, unsigned int flags)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
priv = vm->privateData;
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuDomainObjEnterMonitorWithDriver(driver, vm);
ret = qemuMonitorInjectNMI(priv->mon);
qemuDomainObjExitMonitorWithDriver(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int qemuDomainSendKey(virDomainPtr domain,
unsigned int codeset,
unsigned int holdtime,
unsigned int *keycodes,
int nkeycodes,
unsigned int flags)
{
struct qemud_driver *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) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot translate keycode %u of %s codeset to rfb keycode"),
keycodes[i],
virKeycodeSetTypeToString(codeset));
return -1;
}
keycodes[i] = keycode;
}
}
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuDomainObjEnterMonitorWithDriver(driver, vm);
ret = qemuMonitorSendKey(priv->mon, holdtime, keycodes, nkeycodes);
qemuDomainObjExitMonitorWithDriver(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int qemudDomainGetInfo(virDomainPtr dom,
virDomainInfoPtr info)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
int err;
unsigned long long balloon;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
info->state = virDomainObjGetState(vm, NULL);
if (!virDomainObjIsActive(vm)) {
info->cpuTime = 0;
} else {
if (qemudGetProcessInfo(&(info->cpuTime), NULL, NULL, vm->pid, 0) < 0) {
qemuReportError(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 (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)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainGetState(virDomainPtr dom,
int *state,
int *reason,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
*state = virDomainObjGetState(vm, reason);
ret = 0;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainGetControlInfo(virDomainPtr dom,
virDomainControlInfoPtr info,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(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)
virDomainObjUnlock(vm);
return ret;
}
#define QEMUD_SAVE_MAGIC "LibvirtQemudSave"
#define QEMUD_SAVE_PARTIAL "LibvirtQemudPart"
#define QEMUD_SAVE_VERSION 2
verify(sizeof(QEMUD_SAVE_MAGIC) == sizeof(QEMUD_SAVE_PARTIAL));
enum qemud_save_formats {
QEMUD_SAVE_FORMAT_RAW = 0,
QEMUD_SAVE_FORMAT_GZIP = 1,
QEMUD_SAVE_FORMAT_BZIP2 = 2,
/*
* Deprecated by xz and never used as part of a release
* QEMUD_SAVE_FORMAT_LZMA
*/
QEMUD_SAVE_FORMAT_XZ = 3,
QEMUD_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. */
QEMUD_SAVE_FORMAT_LAST
};
VIR_ENUM_DECL(qemudSaveCompression)
VIR_ENUM_IMPL(qemudSaveCompression, QEMUD_SAVE_FORMAT_LAST,
"raw",
"gzip",
"bzip2",
"xz",
"lzop")
struct qemud_save_header {
char magic[sizeof(QEMUD_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(struct qemud_save_header *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, char *xml,
struct qemud_save_header *header)
{
int ret = 0;
if (safewrite(fd, header, sizeof(*header)) != sizeof(*header)) {
ret = -errno;
qemuReportError(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;
qemuReportError(VIR_ERR_OPERATION_FAILED,
_("failed to write xml to '%s'"), path);
goto endjob;
}
endjob:
return ret;
}
/* Given a enum qemud_save_formats 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 == QEMUD_SAVE_FORMAT_RAW ? NULL :
qemudSaveCompressionTypeToString(compress));
}
/* Internal function to properly create or open existing files, with
* ownership affected by qemu driver setup. */
static int
qemuOpenFile(struct qemud_driver *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;
uid_t uid = getuid();
gid_t gid = getgid();
/* 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;
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 && !driver->dynamicOwnership) {
uid = sb.st_uid;
gid = sb.st_gid;
}
}
}
/* First try creating the file as root */
if (!is_reg) {
fd = open(path, oflags & ~O_CREAT);
if (fd < 0) {
virReportSystemError(errno, _("unable to open %s"), path);
goto cleanup;
}
} 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 (driver->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) ||
driver->user == getuid()) {
virReportSystemError(-fd,
_("Failed to create file '%s'"),
path);
goto cleanup;
}
/* On Linux we can also verify the FS-type of the directory. */
switch (virStorageFileIsSharedFS(path)) {
case 1:
/* it was on a network share, so we'll continue
* as outlined above
*/
break;
case -1:
virReportSystemError(errno,
_("Failed to create file "
"'%s': couldn't determine fs type"),
path);
goto cleanup;
case 0:
default:
/* local file - log the error returned by virFileOpenAs */
virReportSystemError(-fd,
_("Failed to create file '%s'"),
path);
goto cleanup;
}
/* Retry creating the file as driver->user */
if ((fd = virFileOpenAs(path, oflags,
S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP,
driver->user, driver->group,
vfoflags | VIR_FILE_OPEN_FORK)) < 0) {
virReportSystemError(-fd,
_("Error from child process creating '%s'"),
path);
goto cleanup;
}
/* Since we had to setuid to create the file, and the fstype
is NFS, we assume it's a root-squashing NFS share, and that
the security driver stuff would have failed anyway */
bypass_security = true;
}
}
cleanup:
if (needUnlink)
*needUnlink = need_unlink;
if (bypassSecurityDriver)
*bypassSecurityDriver = bypass_security;
return fd;
}
/* This internal function expects the driver lock to already be held on
* entry and 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(struct qemud_driver *driver, virDomainPtr dom,
virDomainObjPtr vm, const char *path,
int compressed, const char *xmlin, unsigned int flags)
{
char *xml = NULL;
struct qemud_save_header header;
bool bypassSecurityDriver = false;
int ret = -1;
int rc;
virDomainEventPtr event = NULL;
qemuDomainObjPrivatePtr priv;
bool needUnlink = false;
size_t len;
unsigned long long offset;
unsigned long long pad;
int fd = -1;
int directFlag = 0;
virFileWrapperFdPtr wrapperFd = NULL;
unsigned int wrapperFlags = VIR_FILE_WRAPPER_NON_BLOCKING;
if (qemuProcessAutoDestroyActive(driver, vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is marked for auto destroy"));
goto cleanup;
}
memset(&header, 0, sizeof(header));
memcpy(header.magic, QEMUD_SAVE_PARTIAL, sizeof(header.magic));
header.version = QEMUD_SAVE_VERSION;
header.compressed = compressed;
priv = vm->privateData;
if (qemuDomainObjBeginAsyncJobWithDriver(driver, vm,
QEMU_ASYNC_JOB_SAVE) < 0)
goto cleanup;
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) {
header.was_running = 1;
if (qemuProcessStopCPUs(driver, vm, VIR_DOMAIN_PAUSED_SAVE,
QEMU_ASYNC_JOB_SAVE) < 0)
goto endjob;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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)
header.was_running = 1;
else if (flags & VIR_DOMAIN_SAVE_PAUSED)
header.was_running = 0;
/* 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(driver->caps, xmlin,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE))) {
goto endjob;
}
if (!virDomainDefCheckABIStability(vm->def, def)) {
virDomainDefFree(def);
goto endjob;
}
xml = qemuDomainDefFormatLive(driver, def, true);
} else {
xml = qemuDomainDefFormatLive(driver, vm->def, true);
}
if (!xml) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to get domain xml"));
goto endjob;
}
len = strlen(xml) + 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_EXPAND_N(xml, len, pad) < 0) {
virReportOOMError();
goto endjob;
}
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) {
qemuReportError(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 endjob;
if (!(wrapperFd = virFileWrapperFdNew(&fd, path, wrapperFlags)))
goto endjob;
/* Write header to file, followed by XML */
if (qemuDomainSaveHeader(fd, path, xml, &header) < 0) {
VIR_FORCE_CLOSE(fd);
goto endjob;
}
/* Perform the migration */
if (qemuMigrationToFile(driver, vm, fd, offset, path,
qemuCompressProgramName(compressed),
bypassSecurityDriver,
QEMU_ASYNC_JOB_SAVE) < 0)
goto endjob;
/* 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 endjob;
}
if (virFileWrapperFdClose(wrapperFd) < 0)
goto endjob;
fd = qemuOpenFile(driver, path, O_WRONLY, NULL, NULL);
if (fd < 0)
goto endjob;
memcpy(header.magic, QEMUD_SAVE_MAGIC, sizeof(header.magic));
if (safewrite(fd, &header, sizeof(header)) != sizeof(header)) {
virReportSystemError(errno, _("unable to write %s"), path);
goto endjob;
}
if (VIR_CLOSE(fd) < 0) {
virReportSystemError(errno, _("unable to close %s"), path);
goto endjob;
}
ret = 0;
/* Shut it down */
qemuProcessStop(driver, vm, 0, VIR_DOMAIN_SHUTOFF_SAVED);
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 (header.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");
}
}
if (qemuDomainObjEndAsyncJob(driver, vm) == 0)
vm = NULL;
}
cleanup:
VIR_FORCE_CLOSE(fd);
virFileWrapperFdFree(wrapperFd);
VIR_FREE(xml);
if (ret != 0 && needUnlink)
unlink(path);
if (event)
qemuDomainEventQueue(driver, event);
if (vm)
virDomainObjUnlock(vm);
return ret;
}
/* Returns true if a compression program is available in PATH */
static bool qemudCompressProgramAvailable(enum qemud_save_formats compress)
{
const char *prog;
char *c;
if (compress == QEMUD_SAVE_FORMAT_RAW)
return true;
prog = qemudSaveCompressionTypeToString(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)
{
struct qemud_driver *driver = dom->conn->privateData;
int compressed;
int ret = -1;
virDomainObjPtr vm = NULL;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
qemuDriverLock(driver);
if (driver->saveImageFormat == NULL)
compressed = QEMUD_SAVE_FORMAT_RAW;
else {
compressed = qemudSaveCompressionTypeFromString(driver->saveImageFormat);
if (compressed < 0) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Invalid save image format specified "
"in configuration file"));
goto cleanup;
}
if (!qemudCompressProgramAvailable(compressed)) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Compression program for image format "
"in configuration file isn't available"));
goto cleanup;
}
}
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(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)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainSave(virDomainPtr dom, const char *path)
{
return qemuDomainSaveFlags(dom, path, NULL, 0);
}
static char *
qemuDomainManagedSavePath(struct qemud_driver *driver, virDomainObjPtr vm) {
char *ret;
if (virAsprintf(&ret, "%s/%s.save", driver->saveDir, vm->def->name) < 0) {
virReportOOMError();
return(NULL);
}
return(ret);
}
static int
qemuDomainManagedSave(virDomainPtr dom, unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
char *name = NULL;
int ret = -1;
int compressed;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (!vm->persistent) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot do managed save for transient domain"));
goto cleanup;
}
name = qemuDomainManagedSavePath(driver, vm);
if (name == NULL)
goto cleanup;
VIR_INFO("Saving state to %s", name);
compressed = QEMUD_SAVE_FORMAT_RAW;
ret = qemuDomainSaveInternal(driver, dom, vm, name, compressed,
NULL, flags);
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
VIR_FREE(name);
return ret;
}
static int
qemuDomainHasManagedSaveImage(virDomainPtr dom, unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
char *name = NULL;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
name = qemuDomainManagedSavePath(driver, vm);
if (name == NULL)
goto cleanup;
ret = virFileExists(name);
cleanup:
VIR_FREE(name);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainManagedSaveRemove(virDomainPtr dom, unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
char *name = NULL;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
name = qemuDomainManagedSavePath(driver, vm);
if (name == NULL)
goto cleanup;
ret = unlink(name);
cleanup:
VIR_FREE(name);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
doCoreDump(struct qemud_driver *driver,
virDomainObjPtr vm,
const char *path,
enum qemud_save_formats compress,
bool bypass_cache)
{
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 (bypass_cache) {
flags |= VIR_FILE_WRAPPER_BYPASS_CACHE;
directFlag = virFileDirectFdFlag();
if (directFlag < 0) {
qemuReportError(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 (qemuMigrationToFile(driver, vm, fd, 0, path,
qemuCompressProgramName(compress), false,
QEMU_ASYNC_JOB_DUMP) < 0)
goto cleanup;
if (VIR_CLOSE(fd) < 0) {
virReportSystemError(errno,
_("unable to save file %s"),
path);
goto cleanup;
}
if (virFileWrapperFdClose(wrapperFd) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
virFileWrapperFdFree(wrapperFd);
if (ret != 0)
unlink(path);
return ret;
}
static enum qemud_save_formats
getCompressionType(struct qemud_driver *driver)
{
int compress = QEMUD_SAVE_FORMAT_RAW;
/*
* We reuse "save" flag for "dump" here. Then, we can support the same
* format in "save" and "dump".
*/
if (driver->dumpImageFormat) {
compress = qemudSaveCompressionTypeFromString(driver->dumpImageFormat);
/* Use "raw" as the format if the specified format is not valid,
* or the compress program is not available.
*/
if (compress < 0) {
VIR_WARN("%s", _("Invalid dump image format specified in "
"configuration file, using raw"));
return QEMUD_SAVE_FORMAT_RAW;
}
if (!qemudCompressProgramAvailable(compress)) {
VIR_WARN("%s", _("Compression program for dump image format "
"in configuration file isn't available, "
"using raw"));
return QEMUD_SAVE_FORMAT_RAW;
}
}
return compress;
}
static int qemudDomainCoreDump(virDomainPtr dom,
const char *path,
unsigned int flags)
{
struct qemud_driver *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, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginAsyncJobWithDriver(driver, vm,
QEMU_ASYNC_JOB_DUMP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
}
ret = doCoreDump(driver, vm, path, getCompressionType(driver),
(flags & VIR_DUMP_BYPASS_CACHE) != 0);
if (ret < 0)
goto endjob;
paused = 1;
endjob:
if ((ret == 0) && (flags & VIR_DUMP_CRASH)) {
qemuProcessStop(driver, vm, 0, VIR_DOMAIN_SHUTOFF_CRASHED);
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;
qemuDomainObjEnterMonitorWithDriver(driver, vm);
ret = qemuMonitorSystemReset(priv->mon);
qemuDomainObjExitMonitorWithDriver(driver, vm);
}
if (resume && qemuProcessStartCPUs(driver, vm, dom->conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_DUMP) < 0) {
if (virGetLastError() == NULL)
qemuReportError(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)
virDomainObjUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
return ret;
}
static char *
qemuDomainScreenshot(virDomainPtr dom,
virStreamPtr st,
unsigned int screen,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
char *tmp = NULL;
int tmp_fd = -1;
char *ret = NULL;
bool unlink_tmp = false;
virCheckFlags(0, NULL);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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) {
qemuReportError(VIR_ERR_INVALID_ARG,
"%s", _("currently is supported only taking "
"screenshots of screen ID 0"));
goto endjob;
}
if (virAsprintf(&tmp, "%s/qemu.screendump.XXXXXX", driver->cacheDir) < 0) {
virReportOOMError();
goto endjob;
}
if ((tmp_fd = mkstemp(tmp)) == -1) {
virReportSystemError(errno, _("mkstemp(\"%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) {
qemuReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("unable to open stream"));
goto endjob;
}
ret = strdup("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)
virDomainObjUnlock(vm);
return ret;
}
static void processWatchdogEvent(void *data, void *opaque)
{
int ret;
struct qemuDomainWatchdogEvent *wdEvent = data;
struct qemud_driver *driver = opaque;
qemuDriverLock(driver);
virDomainObjLock(wdEvent->vm);
switch (wdEvent->action) {
case VIR_DOMAIN_WATCHDOG_ACTION_DUMP:
{
char *dumpfile;
if (virAsprintf(&dumpfile, "%s/%s-%u",
driver->autoDumpPath,
wdEvent->vm->def->name,
(unsigned int)time(NULL)) < 0) {
virReportOOMError();
goto unlock;
}
if (qemuDomainObjBeginAsyncJobWithDriver(driver, wdEvent->vm,
QEMU_ASYNC_JOB_DUMP) < 0) {
VIR_FREE(dumpfile);
goto unlock;
}
if (!virDomainObjIsActive(wdEvent->vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
VIR_FREE(dumpfile);
goto endjob;
}
ret = doCoreDump(driver, wdEvent->vm, dumpfile,
getCompressionType(driver),
driver->autoDumpBypassCache);
if (ret < 0)
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Dump failed"));
ret = qemuProcessStartCPUs(driver, wdEvent->vm, NULL,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_DUMP);
if (ret < 0)
qemuReportError(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:
if (virDomainObjUnref(wdEvent->vm) > 0)
virDomainObjUnlock(wdEvent->vm);
qemuDriverUnlock(driver);
VIR_FREE(wdEvent);
}
static int qemudDomainHotplugVcpus(struct qemud_driver *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;
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--;
}
}
ret = 0;
cleanup:
qemuDomainObjExitMonitor(driver, vm);
vm->def->vcpus = vcpus;
virDomainAuditVcpu(vm, oldvcpus, nvcpus, "update", rc == 1);
return ret;
unsupported:
qemuReportError(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)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr persistentDef;
const char * type;
int max;
int ret = -1;
bool maximum;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_VCPU_MAXIMUM, -1);
if (!nvcpus || (unsigned short) nvcpus != nvcpus) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("argument out of range: %d"), nvcpus);
return -1;
}
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
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(driver->caps, vm, &flags,
&persistentDef) < 0)
goto endjob;
/* MAXIMUM cannot be mixed with LIVE. */
if (maximum && (flags & VIR_DOMAIN_AFFECT_LIVE)) {
qemuReportError(VIR_ERR_INVALID_ARG, "%s",
_("cannot adjust maximum on running domain"));
goto endjob;
}
if (!(type = virDomainVirtTypeToString(vm->def->virtType))) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown virt type in domain definition '%d'"),
vm->def->virtType);
goto endjob;
}
if ((max = qemudGetMaxVCPUs(NULL, type)) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("could not determine max vcpus for the domain"));
goto endjob;
}
if (!maximum && vm->def->maxvcpus < max) {
max = vm->def->maxvcpus;
}
if (nvcpus > max) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("requested vcpus is greater than max allowable"
" vcpus for the domain: %d > %d"), nvcpus, max);
goto endjob;
}
switch (flags) {
case VIR_DOMAIN_AFFECT_CONFIG:
if (maximum) {
persistentDef->maxvcpus = nvcpus;
if (nvcpus < persistentDef->vcpus)
persistentDef->vcpus = nvcpus;
} else {
persistentDef->vcpus = nvcpus;
}
ret = 0;
break;
case VIR_DOMAIN_AFFECT_LIVE:
ret = qemudDomainHotplugVcpus(driver, vm, nvcpus);
break;
case VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG:
ret = qemudDomainHotplugVcpus(driver, vm, nvcpus);
if (ret == 0) {
persistentDef->vcpus = nvcpus;
}
break;
}
/* Save the persistent config to disk */
if (flags & VIR_DOMAIN_AFFECT_CONFIG)
ret = virDomainSaveConfig(driver->configDir, persistentDef);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainSetVcpus(virDomainPtr dom, unsigned int nvcpus)
{
return qemuDomainSetVcpusFlags(dom, nvcpus, VIR_DOMAIN_AFFECT_LIVE);
}
static int
qemudDomainPinVcpuFlags(virDomainPtr dom,
unsigned int vcpu,
unsigned char *cpumap,
int maplen,
unsigned int flags) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr persistentDef = NULL;
int maxcpu, hostcpus;
virNodeInfo nodeinfo;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool canResetting = true;
int pcpu;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto cleanup;
priv = vm->privateData;
if (vcpu > (priv->nvcpupids-1)) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("vcpu number out of range %d > %d"),
vcpu, priv->nvcpupids);
goto cleanup;
}
if (nodeGetInfo(dom->conn, &nodeinfo) < 0)
goto cleanup;
hostcpus = VIR_NODEINFO_MAXCPUS(nodeinfo);
maxcpu = maplen * 8;
if (maxcpu > hostcpus)
maxcpu = hostcpus;
/* pinning to all physical cpus means resetting,
* so check if we can reset setting.
*/
for (pcpu = 0; pcpu < hostcpus; pcpu++) {
if ((cpumap[pcpu/8] & (1 << (pcpu % 8))) == 0) {
canResetting = false;
break;
}
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (priv->vcpupids != NULL) {
if (virProcessInfoSetAffinity(priv->vcpupids[vcpu],
cpumap, maplen, maxcpu) < 0)
goto cleanup;
} else {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not supported"));
goto cleanup;
}
if (canResetting) {
if (virDomainVcpuPinDel(vm->def, vcpu) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to delete vcpupin xml of "
"a running domain"));
goto cleanup;
}
} else {
if (virDomainVcpuPinAdd(vm->def, cpumap, maplen, vcpu) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to update or add vcpupin xml of "
"a running domain"));
goto cleanup;
}
}
if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0)
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (canResetting) {
if (virDomainVcpuPinDel(persistentDef, vcpu) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to delete vcpupin xml of "
"a persistent domain"));
goto cleanup;
}
} else {
if (virDomainVcpuPinAdd(persistentDef, cpumap, maplen, vcpu) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to update or add vcpupin xml of "
"a persistent domain"));
goto cleanup;
}
}
ret = virDomainSaveConfig(driver->configDir, persistentDef);
goto cleanup;
}
ret = 0;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int
qemudDomainPinVcpu(virDomainPtr dom,
unsigned int vcpu,
unsigned char *cpumap,
int maplen) {
return qemudDomainPinVcpuFlags(dom, vcpu, cpumap, maplen,
VIR_DOMAIN_AFFECT_LIVE);
}
static int
qemudDomainGetVcpuPinInfo(virDomainPtr dom,
int ncpumaps,
unsigned char *cpumaps,
int maplen,
unsigned int flags) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
virNodeInfo nodeinfo;
virDomainDefPtr targetDef = NULL;
int ret = -1;
int maxcpu, hostcpus, vcpu, pcpu;
int n;
virDomainVcpuPinDefPtr *vcpupin_list;
char *cpumask = NULL;
unsigned char *cpumap;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, 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 (nodeGetInfo(dom->conn, &nodeinfo) < 0)
goto cleanup;
hostcpus = VIR_NODEINFO_MAXCPUS(nodeinfo);
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 (cpumask[pcpu] == 0)
VIR_UNUSE_CPU(cpumap, pcpu);
}
}
ret = ncpumaps;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int
qemudDomainGetVcpus(virDomainPtr dom,
virVcpuInfoPtr info,
int maxinfo,
unsigned char *cpumaps,
int maplen) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virNodeInfo nodeinfo;
int i, v, maxcpu, hostcpus;
int ret = -1;
qemuDomainObjPrivatePtr priv;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s",
_("cannot list vcpu pinning for an inactive domain"));
goto cleanup;
}
priv = vm->privateData;
if (nodeGetInfo(dom->conn, &nodeinfo) < 0)
goto cleanup;
hostcpus = VIR_NODEINFO_MAXCPUS(nodeinfo);
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 &&
qemudGetProcessInfo(&(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);
if (virProcessInfoGetAffinity(priv->vcpupids[v],
cpumap, maplen, maxcpu) < 0)
goto cleanup;
}
} else {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cpu affinity is not available"));
goto cleanup;
}
}
}
ret = maxinfo;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int
qemudDomainGetVcpusFlags(virDomainPtr dom, unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr def;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_VCPU_MAXIMUM, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, 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)
virDomainObjUnlock(vm);
return ret;
}
static int
qemudDomainGetMaxVcpus(virDomainPtr dom)
{
return qemudDomainGetVcpusFlags(dom, (VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_VCPU_MAXIMUM));
}
static int qemudDomainGetSecurityLabel(virDomainPtr dom, virSecurityLabelPtr seclabel)
{
struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
memset(seclabel, 0, sizeof(*seclabel));
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainVirtTypeToString(vm->def->virtType)) {
qemuReportError(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) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Failed to get security label"));
goto cleanup;
}
}
ret = 0;
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int qemudNodeGetSecurityModel(virConnectPtr conn,
virSecurityModelPtr secmodel)
{
struct qemud_driver *driver = (struct qemud_driver *)conn->privateData;
char *p;
int ret = 0;
qemuDriverLock(driver);
memset(secmodel, 0, sizeof(*secmodel));
/* NULL indicates no driver, which we treat as
* success, but simply return no data in *secmodel */
if (driver->caps->host.secModel.model == NULL)
goto cleanup;
p = driver->caps->host.secModel.model;
if (strlen(p) >= VIR_SECURITY_MODEL_BUFLEN-1) {
qemuReportError(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 = driver->caps->host.secModel.doi;
if (strlen(p) >= VIR_SECURITY_DOI_BUFLEN-1) {
qemuReportError(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:
qemuDriverUnlock(driver);
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(struct qemud_driver *driver,
const char *path,
virDomainDefPtr *ret_def,
struct qemud_save_header *ret_header,
bool bypass_cache,
virFileWrapperFdPtr *wrapperFd,
const char *xmlin, int state, bool edit,
bool unlink_corrupt)
{
int fd;
struct qemud_save_header header;
char *xml = NULL;
virDomainDefPtr def = NULL;
int oflags = edit ? O_RDWR : O_RDONLY;
if (bypass_cache) {
int directFlag = virFileDirectFdFlag();
if (directFlag < 0) {
qemuReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("bypass cache unsupported by this system"));
goto error;
}
oflags |= directFlag;
}
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;
}
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to read qemu header"));
goto error;
}
if (memcmp(header.magic, QEMUD_SAVE_MAGIC, sizeof(header.magic)) != 0) {
const char *msg = _("image magic is incorrect");
if (memcmp(header.magic, QEMUD_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;
}
}
qemuReportError(VIR_ERR_OPERATION_FAILED, "%s", msg);
goto error;
}
if (header.version > QEMUD_SAVE_VERSION) {
/* convert endianess and try again */
bswap_header(&header);
}
if (header.version > QEMUD_SAVE_VERSION) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
_("image version is not supported (%d > %d)"),
header.version, QEMUD_SAVE_VERSION);
goto error;
}
if (header.xml_len <= 0) {
qemuReportError(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) {
qemuReportError(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(driver->caps, xml,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto error;
if (xmlin) {
virDomainDefPtr def2 = NULL;
if (!(def2 = virDomainDefParseString(driver->caps, xmlin,
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;
return fd;
error:
virDomainDefFree(def);
VIR_FREE(xml);
VIR_FORCE_CLOSE(fd);
return -1;
}
static int ATTRIBUTE_NONNULL(4) ATTRIBUTE_NONNULL(5) ATTRIBUTE_NONNULL(6)
qemuDomainSaveImageStartVM(virConnectPtr conn,
struct qemud_driver *driver,
virDomainObjPtr vm,
int *fd,
const struct qemud_save_header *header,
const char *path,
bool start_paused)
{
int ret = -1;
virDomainEventPtr event;
int intermediatefd = -1;
virCommandPtr cmd = NULL;
if (header->version == 2) {
const char *prog = qemudSaveCompressionTypeToString(header->compressed);
if (prog == NULL) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
_("Invalid compressed save format %d"),
header->compressed);
goto out;
}
if (header->compressed != QEMUD_SAVE_FORMAT_RAW) {
cmd = virCommandNewArgList(prog, "-dc", NULL);
intermediatefd = *fd;
*fd = -1;
virCommandSetInputFD(cmd, intermediatefd);
virCommandSetOutputFD(cmd, fd);
if (virCommandRunAsync(cmd, NULL) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to start decompression binary %s"),
prog);
*fd = intermediatefd;
goto out;
}
}
}
/* Set the migration source and start it up. */
ret = qemuProcessStart(conn, driver, vm, "stdio", false, true,
false, *fd, path, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_RESTORE);
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)
ret = -1;
}
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 out;
}
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)
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to resume domain"));
goto out;
}
if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0) {
VIR_WARN("Failed to save status on vm %s", vm->def->name);
goto out;
}
} 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;
out:
virCommandFree(cmd);
if (virSecurityManagerRestoreSavedStateLabel(driver->securityManager,
vm->def, path) < 0)
VIR_WARN("failed to restore save state label on %s", path);
return ret;
}
static int
qemuDomainRestoreFlags(virConnectPtr conn,
const char *path,
const char *dxml,
unsigned int flags)
{
struct qemud_driver *driver = conn->privateData;
virDomainDefPtr def = NULL;
virDomainObjPtr vm = NULL;
int fd = -1;
int ret = -1;
struct qemud_save_header header;
virFileWrapperFdPtr wrapperFd = NULL;
int state = -1;
virCheckFlags(VIR_DOMAIN_SAVE_BYPASS_CACHE |
VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
qemuDriverLock(driver);
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 (virDomainObjIsDuplicate(&driver->domains, def, 1) < 0)
goto cleanup;
if (!(vm = virDomainAssignDef(driver->caps,
&driver->domains,
def, true))) {
/* virDomainAssignDef already set the error */
goto cleanup;
}
def = NULL;
if (qemuDomainObjBeginJobWithDriver(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)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
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)
{
struct qemud_driver *driver = conn->privateData;
char *ret = NULL;
virDomainDefPtr def = NULL;
int fd = -1;
struct qemud_save_header header;
/* We only take subset of virDomainDefFormat flags. */
virCheckFlags(VIR_DOMAIN_XML_SECURE, NULL);
qemuDriverLock(driver);
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);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainSaveImageDefineXML(virConnectPtr conn, const char *path,
const char *dxml, unsigned int flags)
{
struct qemud_driver *driver = conn->privateData;
int ret = -1;
virDomainDefPtr def = NULL;
int fd = -1;
struct qemud_save_header header;
char *xml = NULL;
size_t len;
int state = -1;
virCheckFlags(VIR_DOMAIN_SAVE_RUNNING |
VIR_DOMAIN_SAVE_PAUSED, -1);
qemuDriverLock(driver);
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));
if (!xml)
goto cleanup;
len = strlen(xml) + 1;
if (len > header.xml_len) {
qemuReportError(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);
qemuDriverUnlock(driver);
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,
struct qemud_driver *driver,
virDomainObjPtr vm,
const char *path,
bool start_paused,
bool bypass_cache)
{
virDomainDefPtr def = NULL;
int fd = -1;
int ret = -1;
struct qemud_save_header 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);
qemuReportError(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);
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)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
char *ret = NULL;
unsigned long long balloon;
int err = 0;
/* Flags checked by virDomainDefFormat */
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
/* Refresh current memory based on balloon info if supported */
if ((vm->def->memballoon != NULL) &&
(vm->def->memballoon->model != VIR_DOMAIN_MEMBALLOON_MODEL_NONE) &&
(virDomainObjIsActive(vm))) {
qemuDomainObjPrivatePtr priv = vm->privateData;
/* Don't delay if someone's using the monitor, just use
* existing most recent data instead */
if (qemuDomainJobAllowed(priv, QEMU_JOB_QUERY)) {
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuDomainObjEnterMonitorWithDriver(driver, vm);
err = qemuMonitorGetBalloonInfo(priv->mon, &balloon);
qemuDomainObjExitMonitorWithDriver(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 */
}
}
ret = qemuDomainFormatXML(driver, vm, flags);
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static char *qemuDomainXMLFromNative(virConnectPtr conn,
const char *format,
const char *config,
unsigned int flags)
{
struct qemud_driver *driver = conn->privateData;
virDomainDefPtr def = NULL;
char *xml = NULL;
virCheckFlags(0, NULL);
if (STRNEQ(format, QEMU_CONFIG_FORMAT_ARGV)) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("unsupported config type %s"), format);
goto cleanup;
}
qemuDriverLock(driver);
def = qemuParseCommandLineString(driver->caps, config,
NULL, NULL, NULL);
qemuDriverUnlock(driver);
if (!def)
goto cleanup;
if (!def->name &&
!(def->name = strdup("unnamed"))) {
virReportOOMError();
goto cleanup;
}
xml = virDomainDefFormat(def, VIR_DOMAIN_XML_INACTIVE);
cleanup:
virDomainDefFree(def);
return xml;
}
static char *qemuDomainXMLToNative(virConnectPtr conn,
const char *format,
const char *xmlData,
unsigned int flags)
{
struct qemud_driver *driver = conn->privateData;
virDomainDefPtr def = NULL;
virDomainChrSourceDef monConfig;
virBitmapPtr qemuCaps = NULL;
bool monitor_json = false;
virCommandPtr cmd = NULL;
char *ret = NULL;
int i;
virCheckFlags(0, NULL);
qemuDriverLock(driver);
if (STRNEQ(format, QEMU_CONFIG_FORMAT_ARGV)) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("unsupported config type %s"), format);
goto cleanup;
}
def = virDomainDefParseString(driver->caps, xmlData,
QEMU_EXPECTED_VIRT_TYPES, 0);
if (!def)
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;
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 = strdup(brname);
if (!brnamecopy) {
virReportOOMError();
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);
VIR_FREE(net->data.direct.virtPortProfile);
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;
}
net->info.bootIndex = bootIndex;
}
for (i = 0 ; i < def->ngraphics ; i++) {
if (def->graphics[i]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC &&
def->graphics[i]->data.vnc.autoport)
def->graphics[i]->data.vnc.port = QEMU_VNC_PORT_MIN;
}
if (qemuCapsExtractVersionInfo(def->emulator, def->os.arch,
NULL,
&qemuCaps) < 0)
goto cleanup;
monitor_json = qemuCapsGet(qemuCaps, QEMU_CAPS_MONITOR_JSON);
if (qemuProcessPrepareMonitorChr(driver, &monConfig, def->name) < 0)
goto cleanup;
if (qemuAssignDeviceAliases(def, qemuCaps) < 0)
goto cleanup;
if (!(cmd = qemuBuildCommandLine(conn, driver, def,
&monConfig, monitor_json, qemuCaps,
NULL, -1, NULL, VIR_NETDEV_VPORT_PROFILE_OP_NO_OP)))
goto cleanup;
ret = virCommandToString(cmd);
cleanup:
qemuDriverUnlock(driver);
qemuCapsFree(qemuCaps);
virCommandFree(cmd);
virDomainDefFree(def);
return ret;
}
static int qemudListDefinedDomains(virConnectPtr conn,
char **const names, int nnames) {
struct qemud_driver *driver = conn->privateData;
int n;
qemuDriverLock(driver);
n = virDomainObjListGetInactiveNames(&driver->domains, names, nnames);
qemuDriverUnlock(driver);
return n;
}
static int qemudNumDefinedDomains(virConnectPtr conn) {
struct qemud_driver *driver = conn->privateData;
int n;
qemuDriverLock(driver);
n = virDomainObjListNumOfDomains(&driver->domains, 0);
qemuDriverUnlock(driver);
return n;
}
static int
qemuDomainObjStart(virConnectPtr conn,
struct qemud_driver *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;
/*
* 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;
}
} else {
ret = qemuDomainObjRestore(conn, driver, vm, managed_save,
start_paused, bypass_cache);
if (ret == 0 && unlink(managed_save) < 0)
VIR_WARN("Failed to remove the managed state %s", managed_save);
if (ret > 0)
VIR_WARN("Ignoring incomplete managed state %s", managed_save);
else
goto cleanup;
}
}
ret = qemuProcessStart(conn, driver, vm, NULL, true, start_paused,
autodestroy, -1, NULL, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE);
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
qemuDomainStartWithFlags(virDomainPtr dom, unsigned int flags)
{
struct qemud_driver *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);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainObjIsActive(vm)) {
qemuReportError(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)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainStart(virDomainPtr dom)
{
return qemuDomainStartWithFlags(dom, 0);
}
static int
qemudCanonicalizeMachineFromInfo(virDomainDefPtr def,
virCapsGuestDomainInfoPtr info,
char **canonical)
{
int i;
*canonical = NULL;
for (i = 0; i < info->nmachines; i++) {
virCapsGuestMachinePtr machine = info->machines[i];
if (!machine->canonical)
continue;
if (def->os.machine && STRNEQ(def->os.machine, machine->name))
continue;
if (!(*canonical = strdup(machine->canonical))) {
virReportOOMError();
return -1;
}
break;
}
return 0;
}
static int
qemudCanonicalizeMachineDirect(virDomainDefPtr def, char **canonical)
{
virCapsGuestMachinePtr *machines = NULL;
int i, nmachines = 0;
if (qemuCapsProbeMachineTypes(def->emulator, &machines, &nmachines) < 0)
return -1;
for (i = 0; i < nmachines; i++) {
if (!machines[i]->canonical)
continue;
if (def->os.machine && STRNEQ(def->os.machine, machines[i]->name))
continue;
*canonical = machines[i]->canonical;
machines[i]->canonical = NULL;
break;
}
virCapabilitiesFreeMachines(machines, nmachines);
return 0;
}
int
qemudCanonicalizeMachine(struct qemud_driver *driver, virDomainDefPtr def)
{
char *canonical = NULL;
int i;
for (i = 0; i < driver->caps->nguests; i++) {
virCapsGuestPtr guest = driver->caps->guests[i];
virCapsGuestDomainInfoPtr info;
int j;
for (j = 0; j < guest->arch.ndomains; j++) {
info = &guest->arch.domains[j]->info;
if (!info->emulator || !STREQ(info->emulator, def->emulator))
continue;
if (!info->nmachines)
info = &guest->arch.defaultInfo;
if (qemudCanonicalizeMachineFromInfo(def, info, &canonical) < 0)
return -1;
goto out;
}
info = &guest->arch.defaultInfo;
if (info->emulator && STREQ(info->emulator, def->emulator)) {
if (qemudCanonicalizeMachineFromInfo(def, info, &canonical) < 0)
return -1;
goto out;
}
}
if (qemudCanonicalizeMachineDirect(def, &canonical) < 0)
return -1;
out:
if (canonical) {
VIR_FREE(def->os.machine);
def->os.machine = canonical;
}
return 0;
}
static virDomainPtr qemudDomainDefine(virConnectPtr conn, const char *xml) {
struct qemud_driver *driver = conn->privateData;
virDomainDefPtr def;
virDomainObjPtr vm = NULL;
virDomainPtr dom = NULL;
virDomainEventPtr event = NULL;
int dupVM;
qemuDriverLock(driver);
if (!(def = virDomainDefParseString(driver->caps, xml,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (virSecurityManagerVerify(driver->securityManager, def) < 0)
goto cleanup;
if ((dupVM = virDomainObjIsDuplicate(&driver->domains, def, 0)) < 0)
goto cleanup;
if (qemudCanonicalizeMachine(driver, def) < 0)
goto cleanup;
if (qemuDomainAssignAddresses(def) < 0)
goto cleanup;
if (!(vm = virDomainAssignDef(driver->caps,
&driver->domains,
def, false))) {
goto cleanup;
}
def = NULL;
vm->persistent = 1;
if (virDomainSaveConfig(driver->configDir,
vm->newDef ? vm->newDef : vm->def) < 0) {
VIR_INFO("Defining domain '%s'", vm->def->name);
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
goto cleanup;
}
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_DEFINED,
!dupVM ?
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(def);
if (vm)
virDomainObjUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
return dom;
}
static int
qemuDomainUndefineFlags(virDomainPtr dom,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainEventPtr event = NULL;
char *name = NULL;
int ret = -1;
int nsnapshots;
virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE |
VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!vm->persistent) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot undefine transient domain"));
goto cleanup;
}
if (!virDomainObjIsActive(vm) &&
(nsnapshots = virDomainSnapshotObjListNum(&vm->snapshots, 0))) {
if (!(flags & VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA)) {
qemuReportError(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) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to remove domain managed "
"save image"));
goto cleanup;
}
} else {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Refusing to undefine while domain managed "
"save image exists"));
goto cleanup;
}
}
if (virDomainDeleteConfig(driver->configDir, driver->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)
virDomainObjUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
qemuDriverUnlock(driver);
return ret;
}
static int
qemudDomainUndefine(virDomainPtr dom)
{
return qemuDomainUndefineFlags(dom, 0);
}
static int
qemuDomainAttachDeviceDiskLive(virConnectPtr conn,
struct qemud_driver *driver,
virDomainObjPtr vm,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk = dev->data.disk;
virCgroupPtr cgroup = NULL;
int ret = -1;
if (disk->driverName != NULL && !STREQ(disk->driverName, "qemu")) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("unsupported driver name '%s' for disk '%s'"),
disk->driverName, disk->src);
goto end;
}
if (qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_DEVICES)) {
if (virCgroupForDomain(driver->cgroup, vm->def->name, &cgroup, 0)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to find cgroup for %s"),
vm->def->name);
goto end;
}
if (qemuSetupDiskCgroup(driver, vm, cgroup, disk) < 0)
goto end;
}
switch (disk->device) {
case VIR_DOMAIN_DISK_DEVICE_CDROM:
case VIR_DOMAIN_DISK_DEVICE_FLOPPY:
ret = qemuDomainChangeEjectableMedia(driver, vm, disk, false);
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) {
qemuReportError(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 = qemuDomainAttachPciDiskDevice(conn, driver, vm, disk);
} else if (disk->bus == VIR_DOMAIN_DISK_BUS_SCSI) {
ret = qemuDomainAttachSCSIDisk(conn, driver, vm, disk);
} else {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk bus '%s' cannot be hotplugged."),
virDomainDiskBusTypeToString(disk->bus));
}
break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk device type '%s' cannot be hotplugged"),
virDomainDiskDeviceTypeToString(disk->device));
break;
}
if (ret != 0 && cgroup) {
if (qemuTeardownDiskCgroup(driver, vm, cgroup, disk) < 0)
VIR_WARN("Failed to teardown cgroup for disk path %s",
NULLSTR(disk->src));
}
end:
if (cgroup)
virCgroupFree(&cgroup);
return ret;
}
static int
qemuDomainAttachDeviceControllerLive(struct qemud_driver *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:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk controller bus '%s' cannot be hotplugged."),
virDomainControllerTypeToString(cont->type));
break;
}
return ret;
}
static int
qemuDomainAttachDeviceLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virDomainPtr dom)
{
struct qemud_driver *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:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("device type '%s' cannot be attached"),
virDomainDeviceTypeToString(dev->type));
break;
}
return ret;
}
static int
qemuDomainDetachDeviceDiskLive(struct qemud_driver *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 = qemuDomainDetachPciDiskDevice(driver, vm, dev);
else if (disk->bus == VIR_DOMAIN_DISK_BUS_SCSI)
ret = qemuDomainDetachDiskDevice(driver, vm, dev);
else if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_USB)
ret = qemuDomainDetachDiskDevice(driver, vm, dev);
else
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("This type of disk cannot be hot unplugged"));
break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk device type '%s' cannot be detached"),
virDomainDiskDeviceTypeToString(disk->type));
break;
}
return ret;
}
static int
qemuDomainDetachDeviceControllerLive(struct qemud_driver *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 :
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk controller bus '%s' cannot be hotunplugged."),
virDomainControllerTypeToString(cont->type));
}
return ret;
}
static int
qemuDomainDetachDeviceLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virDomainPtr dom)
{
struct qemud_driver *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:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
"%s", _("This type of device cannot be hot unplugged"));
break;
}
return ret;
}
static int
qemuDomainChangeDiskMediaLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
struct qemud_driver *driver,
bool force)
{
virDomainDiskDefPtr disk = dev->data.disk;
virCgroupPtr cgroup = NULL;
int ret = -1;
if (qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_DEVICES)) {
if (virCgroupForDomain(driver->cgroup,
vm->def->name, &cgroup, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to find cgroup for %s"),
vm->def->name);
goto end;
}
if (qemuSetupDiskCgroup(driver, vm, cgroup, disk) < 0)
goto end;
}
switch (disk->device) {
case VIR_DOMAIN_DISK_DEVICE_CDROM:
case VIR_DOMAIN_DISK_DEVICE_FLOPPY:
ret = qemuDomainChangeEjectableMedia(driver, vm, disk, force);
if (ret == 0)
dev->data.disk = NULL;
break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk bus '%s' cannot be updated."),
virDomainDiskBusTypeToString(disk->bus));
break;
}
if (ret != 0 && cgroup) {
if (qemuTeardownDiskCgroup(driver, vm, cgroup, disk) < 0)
VIR_WARN("Failed to teardown cgroup for disk path %s",
NULLSTR(disk->src));
}
end:
if (cgroup)
virCgroupFree(&cgroup);
return ret;
}
static int
qemuDomainUpdateDeviceLive(virDomainObjPtr vm,
virDomainDeviceDefPtr dev,
virDomainPtr dom,
bool force)
{
struct qemud_driver *driver = dom->conn->privateData;
int ret = -1;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
ret = qemuDomainChangeDiskMediaLive(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->data.net);
break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("device type '%s' cannot be updated"),
virDomainDeviceTypeToString(dev->type));
break;
}
return ret;
}
static int
qemuDomainAttachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk;
virDomainNetDefPtr net;
virDomainHostdevDefPtr hostdev;
virDomainLeaseDefPtr lease;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
disk = dev->data.disk;
if (virDomainDiskIndexByName(vmdef, disk->dst, true) >= 0) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("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) < 0)
return -1;
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if (virDomainNetIndexByMac(vmdef, net->mac) >= 0) {
char macbuf[VIR_MAC_STRING_BUFLEN];
virMacAddrFormat(net->mac, macbuf);
qemuReportError(VIR_ERR_INVALID_ARG,
_("mac %s already exists"), macbuf);
return -1;
}
if (virDomainNetInsert(vmdef, net)) {
virReportOOMError();
return -1;
}
dev->data.net = NULL;
if (qemuDomainAssignAddresses(vmdef) < 0)
return -1;
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
hostdev = dev->data.hostdev;
if (virDomainHostdevFind(vmdef, hostdev, NULL) >= 0) {
qemuReportError(VIR_ERR_INVALID_ARG, "%s",
_("device is already in the domain configuration"));
return -1;
}
if (virDomainHostdevInsert(vmdef, hostdev)) {
virReportOOMError();
return -1;
}
dev->data.hostdev = NULL;
if (qemuDomainAssignAddresses(vmdef) < 0)
return -1;
break;
case VIR_DOMAIN_DEVICE_LEASE:
lease = dev->data.lease;
if (virDomainLeaseIndex(vmdef, lease) >= 0) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("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;
default:
qemuReportError(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, det_net;
virDomainHostdevDefPtr hostdev, det_hostdev;
virDomainLeaseDefPtr lease, det_lease;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
disk = dev->data.disk;
if (!(det_disk = virDomainDiskRemoveByName(vmdef, disk->dst))) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("no target device %s"), disk->dst);
return -1;
}
virDomainDiskDefFree(det_disk);
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if (!(det_net = virDomainNetRemoveByMac(vmdef, net->mac))) {
char macbuf[VIR_MAC_STRING_BUFLEN];
virMacAddrFormat(net->mac, macbuf);
qemuReportError(VIR_ERR_INVALID_ARG,
_("no nic of mac %s"), macbuf);
return -1;
}
virDomainNetDefFree(det_net);
break;
case VIR_DOMAIN_DEVICE_HOSTDEV: {
int idx;
hostdev = dev->data.hostdev;
if ((idx = virDomainHostdevFind(vmdef, hostdev, &det_hostdev)) < 0) {
qemuReportError(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))) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("Lease %s in lockspace %s does not exist"),
lease->key, NULLSTR(lease->lockspace));
return -1;
}
virDomainLeaseDefFree(det_lease);
break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent detach of device is not supported"));
return -1;
}
return 0;
}
static int
qemuDomainUpdateDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr orig, disk;
virDomainNetDefPtr net;
int pos;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
disk = dev->data.disk;
pos = virDomainDiskIndexByName(vmdef, disk->dst, false);
if (pos < 0) {
qemuReportError(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)) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("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->driverType) {
VIR_FREE(orig->driverType);
orig->driverType = disk->driverType;
disk->driverType = NULL;
}
disk->src = NULL;
break;
case VIR_DOMAIN_DEVICE_NET:
net = dev->data.net;
if ((pos = virDomainNetIndexByMac(vmdef, net->mac)) < 0) {
char macbuf[VIR_MAC_STRING_BUFLEN];
virMacAddrFormat(net->mac, macbuf);
qemuReportError(VIR_ERR_INVALID_ARG,
_("mac %s doesn't exist"), macbuf);
return -1;
}
virDomainNetDefFree(vmdef->nets[pos]);
vmdef->nets[pos] = net;
dev->data.net = NULL;
if (qemuDomainAssignAddresses(vmdef) < 0)
return -1;
break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent update of device is not supported"));
return -1;
}
return 0;
}
/* Actions for qemuDomainModifyDeviceFlags */
enum {
QEMU_DEVICE_ATTACH,
QEMU_DEVICE_DETACH,
QEMU_DEVICE_UPDATE,
};
static int
qemuDomainModifyDeviceFlags(virDomainPtr dom, const char *xml,
unsigned int flags, int action)
{
struct qemud_driver *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;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
(action == QEMU_DEVICE_UPDATE ?
VIR_DOMAIN_DEVICE_MODIFY_FORCE : 0), -1);
affect = flags & (VIR_DOMAIN_AFFECT_LIVE | VIR_DOMAIN_AFFECT_CONFIG);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(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) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s",
_("cannot do live update a device on "
"inactive domain"));
goto endjob;
}
}
if ((flags & VIR_DOMAIN_AFFECT_CONFIG) && !vm->persistent) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot modify device on transient domain"));
goto endjob;
}
dev = dev_copy = virDomainDeviceDefParse(driver->caps, vm->def, xml,
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(driver->caps, vm->def, dev);
if (!dev_copy)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(driver->caps, vm);
if (!vmdef)
goto endjob;
switch (action) {
case QEMU_DEVICE_ATTACH:
ret = qemuDomainAttachDeviceConfig(vmdef, dev);
break;
case QEMU_DEVICE_DETACH:
ret = qemuDomainDetachDeviceConfig(vmdef, dev);
break;
case QEMU_DEVICE_UPDATE:
ret = qemuDomainUpdateDeviceConfig(vmdef, dev);
break;
default:
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown domain modify action %d"), action);
break;
}
if (ret == -1)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
switch (action) {
case QEMU_DEVICE_ATTACH:
ret = qemuDomainAttachDeviceLive(vm, dev_copy, dom);
break;
case QEMU_DEVICE_DETACH:
ret = qemuDomainDetachDeviceLive(vm, dev_copy, dom);
break;
case QEMU_DEVICE_UPDATE:
ret = qemuDomainUpdateDeviceLive(vm, dev_copy, dom, force);
break;
default:
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown domain modify action %d"), action);
ret = -1;
break;
}
if (ret == -1)
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->caps, driver->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(driver->configDir, vmdef);
if (!ret) {
virDomainObjAssignDef(vm, vmdef, false);
vmdef = NULL;
}
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
virDomainDefFree(vmdef);
if (dev != dev_copy)
virDomainDeviceDefFree(dev_copy);
virDomainDeviceDefFree(dev);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int qemuDomainAttachDeviceFlags(virDomainPtr dom, const char *xml,
unsigned int flags)
{
return qemuDomainModifyDeviceFlags(dom, xml, flags, QEMU_DEVICE_ATTACH);
}
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)
{
return qemuDomainModifyDeviceFlags(dom, xml, flags, QEMU_DEVICE_UPDATE);
}
static int qemuDomainDetachDeviceFlags(virDomainPtr dom, const char *xml,
unsigned int flags)
{
return qemuDomainModifyDeviceFlags(dom, xml, flags, QEMU_DEVICE_DETACH);
}
static int qemuDomainDetachDevice(virDomainPtr dom, const char *xml)
{
return qemuDomainDetachDeviceFlags(dom, xml,
VIR_DOMAIN_AFFECT_LIVE);
}
static int qemudDomainGetAutostart(virDomainPtr dom,
int *autostart) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
*autostart = vm->autostart;
ret = 0;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int qemudDomainSetAutostart(virDomainPtr dom,
int autostart) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
char *configFile = NULL, *autostartLink = NULL;
int ret = -1;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!vm->persistent) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot set autostart for transient domain"));
goto cleanup;
}
autostart = (autostart != 0);
if (vm->autostart != autostart) {
if ((configFile = virDomainConfigFile(driver->configDir, vm->def->name)) == NULL)
goto cleanup;
if ((autostartLink = virDomainConfigFile(driver->autostartDir, vm->def->name)) == NULL)
goto cleanup;
if (autostart) {
if (virFileMakePath(driver->autostartDir) < 0) {
virReportSystemError(errno,
_("cannot create autostart directory %s"),
driver->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)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
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 *qemuGetSchedulerType(virDomainPtr dom,
int *nparams)
{
struct qemud_driver *driver = dom->conn->privateData;
char *ret = NULL;
int rc;
qemuDriverLock(driver);
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPU)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (nparams) {
rc = qemuGetCpuBWStatus(driver->cgroup);
if (rc < 0)
goto cleanup;
else if (rc == 0)
*nparams = 1;
else
*nparams = 3;
}
ret = strdup("posix");
if (!ret)
virReportOOMError();
cleanup:
qemuDriverUnlock(driver);
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;
result[i].path = strndup(temp, p - temp);
if (!result[i].path) {
virReportOOMError();
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:
qemuReportError(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)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
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;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_BLKIO)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
_("blkio cgroup isn't mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"),
vm->def->name);
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) {
qemuReportError(VIR_ERR_INVALID_ARG, "%s",
_("out of blkio weight range."));
ret = -1;
continue;
}
rc = virCgroupSetBlkioWeight(group, 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(group,
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) {
qemuReportError(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(driver->configDir, persistentDef) < 0)
ret = -1;
}
cleanup:
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainGetBlkioParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i, j;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
unsigned int val;
int ret = -1;
int rc;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
qemuDriverLock(driver);
/* 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;
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if ((*nparams) == 0) {
/* Current number of blkio parameters supported by cgroups */
*nparams = QEMU_NB_BLKIO_PARAM;
ret = 0;
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_BLKIO)) {
qemuReportError(VIR_ERR_OPERATION_INVALID, _("blkio cgroup isn't mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"), vm->def->name);
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(group, &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) {
qemuReportError(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) {
param->value.s = strdup("");
if (!param->value.s) {
virReportOOMError();
goto cleanup;
}
}
param->type = VIR_TYPED_PARAM_STRING;
if (virStrcpyStatic(param->field,
VIR_DOMAIN_BLKIO_DEVICE_WEIGHT) == NULL) {
qemuReportError(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 (group)
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainSetMemoryParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virDomainDefPtr persistentDef = NULL;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
int ret = -1;
int rc;
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;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_MEMORY)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup memory controller is not mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"), vm->def->name);
goto cleanup;
}
}
ret = 0;
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_MEMORY_HARD_LIMIT)) {
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
rc = virCgroupSetMemoryHardLimit(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set memory hard_limit tunable"));
ret = -1;
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
persistentDef->mem.hard_limit = params[i].value.ul;
}
} else if (STREQ(param->field, VIR_DOMAIN_MEMORY_SOFT_LIMIT)) {
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
rc = virCgroupSetMemorySoftLimit(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set memory soft_limit tunable"));
ret = -1;
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
persistentDef->mem.soft_limit = params[i].value.ul;
}
} else if (STREQ(param->field, VIR_DOMAIN_MEMORY_SWAP_HARD_LIMIT)) {
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
rc = virCgroupSetMemSwapHardLimit(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set swap_hard_limit tunable"));
ret = -1;
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
persistentDef->mem.swap_hard_limit = params[i].value.ul;
}
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (virDomainSaveConfig(driver->configDir, persistentDef) < 0)
ret = -1;
}
cleanup:
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainGetMemoryParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
int rc;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
qemuDriverLock(driver);
/* We don't return strings, and thus trivially support this flag. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_MEMORY)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup memory controller is not mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"), vm->def->name);
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;
/* Coverity does not realize that if we get here, group is set. */
sa_assert(group);
switch (i) {
case 0: /* fill memory hard limit here */
rc = virCgroupGetMemoryHardLimit(group, &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(group, &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(group, &val);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get swap hard limit"));
goto cleanup;
}
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 (group)
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainSetNumaParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virDomainDefPtr persistentDef = NULL;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
int ret = -1;
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;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPUSET)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup cpuset controller is not mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"),
vm->def->name);
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) {
qemuReportError(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;
bool savedmask;
char oldnodemask[VIR_DOMAIN_CPUMASK_LEN];
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (vm->def->numatune.memory.mode !=
VIR_DOMAIN_NUMATUNE_MEM_STRICT) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("change of nodeset for running domain "
"requires strict numa mode"));
ret = -1;
continue;
}
rc = virCgroupSetCpusetMems(group, params[i].value.s);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set numa tunable"));
ret = -1;
continue;
}
/* update vm->def here so that dumpxml can read the new
* values from vm->def. */
savedmask = false;
if (!vm->def->numatune.memory.nodemask) {
if (VIR_ALLOC_N(vm->def->numatune.memory.nodemask,
VIR_DOMAIN_CPUMASK_LEN) < 0) {
virReportOOMError();
ret = -1;
goto cleanup;
}
} else {
memcpy(oldnodemask, vm->def->numatune.memory.nodemask,
VIR_DOMAIN_CPUMASK_LEN);
savedmask = true;
}
if (virDomainCpuSetParse(params[i].value.s,
0,
vm->def->numatune.memory.nodemask,
VIR_DOMAIN_CPUMASK_LEN) < 0) {
if (savedmask)
memcpy(vm->def->numatune.memory.nodemask,
oldnodemask, VIR_DOMAIN_CPUMASK_LEN);
else
VIR_FREE(vm->def->numatune.memory.nodemask);
ret = -1;
continue;
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
savedmask = false;
if (!persistentDef->numatune.memory.nodemask) {
if (VIR_ALLOC_N(persistentDef->numatune.memory.nodemask,
VIR_DOMAIN_CPUMASK_LEN) < 0) {
virReportOOMError();
ret = -1;
goto cleanup;
}
} else {
memcpy(oldnodemask, persistentDef->numatune.memory.nodemask,
VIR_DOMAIN_CPUMASK_LEN);
savedmask = true;
}
if (virDomainCpuSetParse(params[i].value.s,
0,
persistentDef->numatune.memory.nodemask,
VIR_DOMAIN_CPUMASK_LEN) < 0) {
if (savedmask)
memcpy(persistentDef->numatune.memory.nodemask,
oldnodemask, VIR_DOMAIN_CPUMASK_LEN);
else
VIR_FREE(persistentDef->numatune.memory.nodemask);
ret = -1;
continue;
}
}
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
if (virDomainSaveConfig(driver->configDir, persistentDef) < 0)
ret = -1;
}
cleanup:
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainGetNumaParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
char *nodeset = NULL;
int ret = -1;
int rc;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
qemuDriverLock(driver);
/* 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;
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, 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 (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_MEMORY)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup memory controller is not mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"),
vm->def->name);
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) {
char *mask = persistentDef->numatune.memory.nodemask;
if (mask)
nodeset = virDomainCpuSetFormat(mask,
VIR_DOMAIN_CPUMASK_LEN);
else
nodeset = strdup("");
} else {
rc = virCgroupGetCpusetMems(group, &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;
break;
default:
break;
/* should not hit here */
}
}
if (*nparams > QEMU_NB_NUMA_PARAM)
*nparams = QEMU_NB_NUMA_PARAM;
ret = 0;
cleanup:
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
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;
long long vm_quota = 0;
long long old_quota = 0;
unsigned long long old_period = 0;
if (period == 0 && quota == 0)
return 0;
/* Ensure that we can multiply by vcpus without overflowing. */
if (quota > LLONG_MAX / vm->def->vcpus) {
virReportSystemError(EINVAL,
_("%s"),
"Unable to set cpu bandwidth quota");
goto cleanup;
}
if (quota > 0)
vm_quota = quota * vm->def->vcpus;
else
vm_quota = quota;
rc = virCgroupGetCpuCfsQuota(cgroup, &old_quota);
if (rc < 0) {
virReportSystemError(-rc, "%s",
_("unable to get cpu bandwidth tunable"));
goto cleanup;
}
rc = virCgroupGetCpuCfsPeriod(cgroup, &old_period);
if (rc < 0) {
virReportSystemError(-rc, "%s",
_("unable to get cpu bandwidth period tunable"));
goto cleanup;
}
/*
* If quota will be changed to a small value, we should modify vcpu's quota
* first. Otherwise, we should modify vm's quota first.
*
* If period will be changed to a small value, we should modify vm's period
* first. Otherwise, we should modify vcpu's period first.
*
* If both quota and period will be changed to a big/small value, we cannot
* modify period and quota together.
*/
if ((quota != 0) && (period != 0)) {
if (((quota > old_quota) && (period > old_period)) ||
((quota < old_quota) && (period < old_period))) {
/* modify period */
if (qemuSetVcpusBWLive(vm, cgroup, period, 0) < 0)
goto cleanup;
/* modify quota */
if (qemuSetVcpusBWLive(vm, cgroup, 0, quota) < 0)
goto cleanup;
return 0;
}
}
if (((vm_quota != 0) && (vm_quota > old_quota)) ||
((period != 0) && (period < old_period)))
/* Set cpu bandwidth for the vm */
if (qemuSetupCgroupVcpuBW(cgroup, period, vm_quota) < 0)
goto cleanup;
/* 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 = virCgroupForVcpu(cgroup, i, &cgroup_vcpu, 0);
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);
}
}
if (((vm_quota != 0) && (vm_quota <= old_quota)) ||
((period != 0) && (period >= old_period)))
/* Set cpu bandwidth for the vm */
if (qemuSetupCgroupVcpuBW(cgroup, period, vm_quota) < 0)
goto cleanup;
return 0;
cleanup:
virCgroupFree(&cgroup_vcpu);
return -1;
}
static int
qemuSetSchedulerParametersFlags(virDomainPtr dom,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr vmdef = NULL;
int ret = -1;
int rc;
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,
NULL) < 0)
return -1;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&vmdef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
/* Make a copy for updated domain. */
vmdef = virDomainObjCopyPersistentDef(driver->caps, vm);
if (!vmdef)
goto cleanup;
}
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPU)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"),
vm->def->name);
goto cleanup;
}
}
for (i = 0; i < nparams; i++) {
virTypedParameterPtr param = &params[i];
if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_CPU_SHARES)) {
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
rc = virCgroupSetCpuShares(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set cpu shares tunable"));
goto cleanup;
}
vm->def->cputune.shares = params[i].value.ul;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
vmdef->cputune.shares = params[i].value.ul;
}
} else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_VCPU_PERIOD)) {
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
rc = qemuSetVcpusBWLive(vm, group, params[i].value.ul, 0);
if (rc != 0)
goto cleanup;
if (params[i].value.ul)
vm->def->cputune.period = params[i].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)) {
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
rc = qemuSetVcpusBWLive(vm, group, 0, params[i].value.l);
if (rc != 0)
goto cleanup;
if (params[i].value.l)
vm->def->cputune.quota = params[i].value.l;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
vmdef->cputune.quota = params[i].value.l;
}
}
}
if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
rc = virDomainSaveConfig(driver->configDir, vmdef);
if (rc < 0)
goto cleanup;
virDomainObjAssignDef(vm, vmdef, false);
vmdef = NULL;
}
ret = 0;
cleanup:
virDomainDefFree(vmdef);
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuSetSchedulerParameters(virDomainPtr dom,
virTypedParameterPtr params,
int nparams)
{
return qemuSetSchedulerParametersFlags(dom,
params,
nparams,
VIR_DOMAIN_AFFECT_LIVE);
}
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, virCgroupPtr cgroup,
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(cgroup, period, quota);
if (rc < 0)
goto cleanup;
if (*quota > 0)
*quota /= vm->def->vcpus;
goto out;
}
/* get period and quota for vcpu0 */
rc = virCgroupForVcpu(cgroup, 0, &cgroup_vcpu, 0);
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
qemuGetSchedulerParametersFlags(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
unsigned long long shares;
unsigned long long period;
long long quota;
int ret = -1;
int rc;
bool cpu_bw_status = false;
int saved_nparams = 0;
virDomainDefPtr persistentDef;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
qemuDriverLock(driver);
/* We don't return strings, and thus trivially support this flag. */
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
if (*nparams > 1) {
rc = qemuGetCpuBWStatus(driver->cgroup);
if (rc < 0)
goto cleanup;
cpu_bw_status = !!rc;
}
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, 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;
}
goto out;
}
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPU)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"), vm->def->name);
goto cleanup;
}
rc = virCgroupGetCpuShares(group, &shares);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to get cpu shares tunable"));
goto cleanup;
}
if (*nparams > 1 && cpu_bw_status) {
rc = qemuGetVcpusBWLive(vm, group, &period, &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++;
}
}
*nparams = saved_nparams;
ret = 0;
cleanup:
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuGetSchedulerParameters(virDomainPtr dom,
virTypedParameterPtr params,
int *nparams)
{
return qemuGetSchedulerParametersFlags(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)
{
struct qemud_driver *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') {
qemuReportError(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) {
qemuReportError(VIR_ERR_OVERFLOW,
_("size must be less than %llu"),
ULLONG_MAX / 1024);
return -1;
}
size *= 1024;
}
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if ((i = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
qemuReportError(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)
virDomainObjUnlock(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)
{
struct qemud_driver *driver = dom->conn->privateData;
int i, ret = -1;
virDomainObjPtr vm;
virDomainDiskDefPtr disk = NULL;
qemuDomainObjPrivatePtr priv;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if ((i = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto cleanup;
}
disk = vm->def->disks[i];
if (!disk->info.alias) {
qemuReportError(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)) {
qemuReportError(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)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainBlockStatsFlags(virDomainPtr dom,
const char *path,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
struct qemud_driver *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;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (*nparams != 0) {
if ((i = virDomainDiskIndexByName(vm->def, path, false)) < 0) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("invalid path: %s"), path);
goto cleanup;
}
disk = vm->def->disks[i];
if (!disk->info.alias) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("missing disk device alias name for %s"),
disk->dst);
goto cleanup;
}
}
priv = vm->privateData;
VIR_DEBUG("priv=%p, params=%p, flags=%x", priv, params, flags);
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
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)
virDomainObjUnlock(vm);
return ret;
}
#ifdef __linux__
static int
qemudDomainInterfaceStats (virDomainPtr dom,
const char *path,
struct _virDomainInterfaceStats *stats)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int i;
int ret = -1;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(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
qemuReportError(VIR_ERR_INVALID_ARG,
_("invalid path, '%s' is not a known interface"), path);
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
#else
static int
qemudDomainInterfaceStats (virDomainPtr dom,
const char *path ATTRIBUTE_UNUSED,
struct _virDomainInterfaceStats *stats ATTRIBUTE_UNUSED)
{
qemuReportError(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)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
virDomainNetDefPtr net = NULL, persistentNet = NULL;
virNetDevBandwidthPtr bandwidth = NULL, newBandwidth = 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;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
net = virDomainNetFind(vm->def, device);
if (!net) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("Can't find device %s"), device);
goto cleanup;
}
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
persistentNet = virDomainNetFind(persistentDef, device);
if (!persistentNet) {
qemuReportError(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) < 0) {
qemuReportError(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(driver->configDir, persistentDef) < 0)
goto cleanup;
}
ret = 0;
cleanup:
virNetDevBandwidthFree(bandwidth);
virNetDevBandwidthFree(newBandwidth);
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainGetInterfaceParameters(virDomainPtr dom,
const char *device,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr def = NULL;
virDomainDefPtr persistentDef = NULL;
virDomainNetDefPtr net = NULL;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_TYPED_PARAM_STRING_OKAY, -1);
qemuDriverLock(driver);
flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), dom->uuid);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, 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) {
qemuReportError(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 (group)
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemudDomainMemoryStats (virDomainPtr dom,
struct _virDomainMemoryStat *stats,
unsigned int nr_stats,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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 (qemudGetProcessInfo(NULL, NULL, &rss, vm->pid, 0) < 0) {
qemuReportError(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)
virDomainObjUnlock(vm);
return ret;
}
static int
qemudDomainBlockPeek (virDomainPtr dom,
const char *path,
unsigned long long offset, size_t size,
void *buffer,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int fd = -1, ret = -1;
const char *actual;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!path || path[0] == '\0') {
qemuReportError(VIR_ERR_INVALID_ARG,
"%s", _("NULL or empty path"));
goto cleanup;
}
/* Check the path belongs to this domain. */
if (!(actual = virDomainDiskPathByName(vm->def, path))) {
qemuReportError(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)
virDomainObjUnlock(vm);
return ret;
}
static int
qemudDomainMemoryPeek (virDomainPtr dom,
unsigned long long offset, size_t size,
void *buffer,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
char *tmp = NULL;
int fd = -1, ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_MEMORY_VIRTUAL | VIR_MEMORY_PHYSICAL, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (flags != VIR_MEMORY_VIRTUAL && flags != VIR_MEMORY_PHYSICAL) {
qemuReportError(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)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
if (virAsprintf(&tmp, "%s/qemu.mem.XXXXXX", driver->cacheDir) < 0) {
virReportOOMError();
goto endjob;
}
/* Create a temporary filename. */
if ((fd = mkstemp (tmp)) == -1) {
virReportSystemError(errno,
_("mkstemp(\"%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)
virDomainObjUnlock(vm);
return ret;
}
static int qemuDomainGetBlockInfo(virDomainPtr dom,
const char *path,
virDomainBlockInfoPtr info,
unsigned int flags) {
struct qemud_driver *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;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!path || path[0] == '\0') {
qemuReportError(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) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("invalid path %s not assigned to domain"), path);
goto cleanup;
}
disk = vm->def->disks[i];
if (!disk->src) {
qemuReportError(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->driverType) {
if ((format = virStorageFileFormatTypeFromString(disk->driverType)) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("unknown disk format %s for %s"),
disk->driverType, disk->src);
goto cleanup;
}
} else {
if (driver->allowDiskFormatProbing) {
if ((format = virStorageFileProbeFormat(disk->src)) < 0)
goto cleanup;
} else {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("no disk format for %s and probing is disabled"),
disk->src);
goto cleanup;
}
}
if (VIR_ALLOC(meta) < 0) {
virReportOOMError();
goto cleanup;
}
if (virStorageFileGetMetadataFromFD(path, fd,
format,
meta) < 0)
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)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainEventRegister(virConnectPtr conn,
virConnectDomainEventCallback callback,
void *opaque,
virFreeCallback freecb)
{
struct qemud_driver *driver = conn->privateData;
int ret;
qemuDriverLock(driver);
ret = virDomainEventStateRegister(conn,
driver->domainEventState,
callback, opaque, freecb);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainEventDeregister(virConnectPtr conn,
virConnectDomainEventCallback callback)
{
struct qemud_driver *driver = conn->privateData;
int ret;
qemuDriverLock(driver);
ret = virDomainEventStateDeregister(conn,
driver->domainEventState,
callback);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainEventRegisterAny(virConnectPtr conn,
virDomainPtr dom,
int eventID,
virConnectDomainEventGenericCallback callback,
void *opaque,
virFreeCallback freecb)
{
struct qemud_driver *driver = conn->privateData;
int ret;
qemuDriverLock(driver);
if (virDomainEventStateRegisterID(conn,
driver->domainEventState,
dom, eventID,
callback, opaque, freecb, &ret) < 0)
ret = -1;
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainEventDeregisterAny(virConnectPtr conn,
int callbackID)
{
struct qemud_driver *driver = conn->privateData;
int ret;
qemuDriverLock(driver);
ret = virDomainEventStateDeregisterID(conn,
driver->domainEventState,
callbackID);
qemuDriverUnlock(driver);
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
qemudDomainMigratePrepareTunnel(virConnectPtr dconn,
virStreamPtr st,
unsigned long flags,
const char *dname,
unsigned long resource ATTRIBUTE_UNUSED,
const char *dom_xml)
{
struct qemud_driver *driver = dconn->privateData;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
qemuDriverLock(driver);
if (!dom_xml) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no domain XML passed"));
goto cleanup;
}
if (!(flags & VIR_MIGRATE_TUNNELLED)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("PrepareTunnel called but no TUNNELLED flag set"));
goto cleanup;
}
if (st == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("tunnelled migration requested but NULL stream passed"));
goto cleanup;
}
if (virLockManagerPluginUsesState(driver->lockManager)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot use migrate v2 protocol with lock manager %s"),
virLockManagerPluginGetName(driver->lockManager));
goto cleanup;
}
ret = qemuMigrationPrepareTunnel(driver, dconn,
NULL, 0, NULL, NULL, /* No cookies in v2 */
st, dname, dom_xml);
cleanup:
qemuDriverUnlock(driver);
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)
qemudDomainMigratePrepare2 (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)
{
struct qemud_driver *driver = dconn->privateData;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
*uri_out = NULL;
qemuDriverLock(driver);
if (virLockManagerPluginUsesState(driver->lockManager)) {
qemuReportError(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
*/
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Tunnelled migration requested but invalid RPC method called"));
goto cleanup;
}
if (!dom_xml) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no domain XML passed"));
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,
dname, dom_xml);
cleanup:
qemuDriverUnlock(driver);
return ret;
}
/* Perform is the second step, and it runs on the source host. */
static int
qemudDomainMigratePerform (virDomainPtr dom,
const char *cookie,
int cookielen,
const char *uri,
unsigned long flags,
const char *dname,
unsigned long resource)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
const char *dconnuri = NULL;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
qemuDriverLock(driver);
if (virLockManagerPluginUsesState(driver->lockManager)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot use migrate v2 protocol with lock manager %s"),
virLockManagerPluginGetName(driver->lockManager));
goto cleanup;
}
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
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:
qemuDriverUnlock(driver);
return ret;
}
/* Finish is the third and final step, and it runs on the destination host. */
static virDomainPtr
qemudDomainMigrateFinish2 (virConnectPtr dconn,
const char *dname,
const char *cookie ATTRIBUTE_UNUSED,
int cookielen ATTRIBUTE_UNUSED,
const char *uri ATTRIBUTE_UNUSED,
unsigned long flags,
int retcode)
{
struct qemud_driver *driver = dconn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
qemuDriverLock(driver);
vm = virDomainFindByName(&driver->domains, dname);
if (!vm) {
qemuReportError(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:
qemuDriverUnlock(driver);
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)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm;
char *xml = NULL;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if ((flags & VIR_MIGRATE_CHANGE_PROTECTION)) {
if (qemuMigrationJobStart(driver, vm, QEMU_ASYNC_JOB_MIGRATION_OUT) < 0)
goto cleanup;
} else {
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(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 (qemuDomainCheckEjectableMedia(driver, vm) < 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 (qemuDriverCloseCallbackSet(driver, vm, domain->conn,
qemuMigrationCleanup) < 0)
goto endjob;
if (qemuMigrationJobContinue(vm) == 0) {
vm = NULL;
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("domain disappeared"));
VIR_FREE(xml);
if (cookieout)
VIR_FREE(*cookieout);
}
} else {
goto endjob;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
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)
{
struct qemud_driver *driver = dconn->privateData;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
*uri_out = NULL;
qemuDriverLock(driver);
if (flags & VIR_MIGRATE_TUNNELLED) {
/* this is a logical error; we never should have gotten here with
* VIR_MIGRATE_TUNNELLED set
*/
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Tunnelled migration requested but invalid RPC method called"));
goto cleanup;
}
if (!dom_xml) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no domain XML passed"));
goto cleanup;
}
ret = qemuMigrationPrepareDirect(driver, dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
uri_in, uri_out,
dname, dom_xml);
cleanup:
qemuDriverUnlock(driver);
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)
{
struct qemud_driver *driver = dconn->privateData;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
if (!dom_xml) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no domain XML passed"));
goto cleanup;
}
if (!(flags & VIR_MIGRATE_TUNNELLED)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("PrepareTunnel called but no TUNNELLED flag set"));
goto cleanup;
}
if (st == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("tunnelled migration requested but NULL stream passed"));
goto cleanup;
}
qemuDriverLock(driver);
ret = qemuMigrationPrepareTunnel(driver, dconn,
cookiein, cookieinlen,
cookieout, cookieoutlen,
st, dname, dom_xml);
qemuDriverUnlock(driver);
cleanup:
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)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
ret = qemuMigrationPerform(driver, dom->conn, vm, xmlin,
dconnuri, uri, cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, dname, resource, true);
cleanup:
qemuDriverUnlock(driver);
return ret;
}
static virDomainPtr
qemuDomainMigrateFinish3(virConnectPtr dconn,
const char *dname,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
const char *dconnuri ATTRIBUTE_UNUSED,
const char *uri ATTRIBUTE_UNUSED,
unsigned long flags,
int cancelled)
{
struct qemud_driver *driver = dconn->privateData;
virDomainObjPtr vm;
virDomainPtr dom = NULL;
virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
qemuDriverLock(driver);
vm = virDomainFindByName(&driver->domains, dname);
if (!vm) {
qemuReportError(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:
qemuDriverUnlock(driver);
return dom;
}
static int
qemuDomainMigrateConfirm3(virDomainPtr domain,
const char *cookiein,
int cookieinlen,
unsigned long flags,
int cancelled)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
enum qemuMigrationJobPhase phase;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
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);
qemuDriverCloseCallbackUnset(driver, 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(driver->configDir, driver->autostartDir, vm);
qemuDomainRemoveInactive(driver, vm);
vm = NULL;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemudNodeDeviceGetPciInfo (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) {
qemuReportError(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
qemudNodeDeviceDettach (virNodeDevicePtr dev)
{
struct qemud_driver *driver = dev->conn->privateData;
pciDevice *pci;
unsigned domain, bus, slot, function;
int ret = -1;
bool in_inactive_list = false;
if (qemudNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0)
return -1;
pci = pciGetDevice(domain, bus, slot, function);
if (!pci)
return -1;
qemuDriverLock(driver);
in_inactive_list = pciDeviceListFind(driver->inactivePciHostdevs, pci);
if (pciDettachDevice(pci, driver->activePciHostdevs,
driver->inactivePciHostdevs) < 0)
goto out;
ret = 0;
out:
qemuDriverUnlock(driver);
if (in_inactive_list)
pciFreeDevice(pci);
return ret;
}
static int
qemudNodeDeviceReAttach (virNodeDevicePtr dev)
{
struct qemud_driver *driver = dev->conn->privateData;
pciDevice *pci;
pciDevice *other;
unsigned domain, bus, slot, function;
int ret = -1;
if (qemudNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0)
return -1;
pci = pciGetDevice(domain, bus, slot, function);
if (!pci)
return -1;
other = pciDeviceListFind(driver->activePciHostdevs, pci);
if (other) {
const char *other_name = pciDeviceGetUsedBy(other);
if (other_name)
qemuReportError(VIR_ERR_OPERATION_INVALID,
_("PCI device %s is still in use by domain %s"),
pciDeviceGetName(pci), other_name);
else
qemuReportError(VIR_ERR_OPERATION_INVALID,
_("PCI device %s is still in use"),
pciDeviceGetName(pci));
}
pciDeviceReAttachInit(pci);
qemuDriverLock(driver);
if (pciReAttachDevice(pci, driver->activePciHostdevs,
driver->inactivePciHostdevs) < 0)
goto out;
ret = 0;
out:
qemuDriverUnlock(driver);
pciFreeDevice(pci);
return ret;
}
static int
qemudNodeDeviceReset (virNodeDevicePtr dev)
{
struct qemud_driver *driver = dev->conn->privateData;
pciDevice *pci;
unsigned domain, bus, slot, function;
int ret = -1;
if (qemudNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0)
return -1;
pci = pciGetDevice(domain, bus, slot, function);
if (!pci)
return -1;
qemuDriverLock(driver);
if (pciResetDevice(pci, driver->activePciHostdevs,
driver->inactivePciHostdevs) < 0)
goto out;
ret = 0;
out:
qemuDriverUnlock(driver);
pciFreeDevice(pci);
return ret;
}
static int
qemuCPUCompare(virConnectPtr conn,
const char *xmlDesc,
unsigned int flags)
{
struct qemud_driver *driver = conn->privateData;
int ret = VIR_CPU_COMPARE_ERROR;
virCheckFlags(0, VIR_CPU_COMPARE_ERROR);
qemuDriverLock(driver);
if (!driver->caps || !driver->caps->host.cpu) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cannot get host CPU capabilities"));
} else {
ret = cpuCompareXML(driver->caps->host.cpu, xmlDesc);
}
qemuDriverUnlock(driver);
return ret;
}
static char *
qemuCPUBaseline(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) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
if (virDomainObjIsActive(vm)) {
if (priv->job.asyncJob) {
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 {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
ret = 0;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int qemuDomainAbortJob(virDomainPtr dom) {
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_ABORT) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
if (!priv->job.asyncJob) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("no job is active on the domain"));
goto endjob;
} else if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot abort incoming migration;"
" use virDomainDestroy instead"));
goto endjob;
}
VIR_DEBUG("Cancelling job at client request");
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorMigrateCancel(priv->mon);
qemuDomainObjExitMonitor(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainMigrateSetMaxDowntime(virDomainPtr dom,
unsigned long long downtime,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
return -1;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MIGRATION_OP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
if (priv->job.asyncJob != QEMU_ASYNC_JOB_MIGRATION_OUT) {
qemuReportError(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)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainMigrateSetMaxSpeed(virDomainPtr dom,
unsigned long bandwidth,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
return -1;
}
priv = vm->privateData;
if (virDomainObjIsActive(vm)) {
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MIGRATION_OP) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainMigrateGetMaxSpeed(virDomainPtr dom,
unsigned long *bandwidth,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
qemuDomainObjPrivatePtr priv;
int ret = -1;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
*bandwidth = priv->migMaxBandwidth;
ret = 0;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static bool
qemuDomainSnapshotIsAllowed(virDomainObjPtr vm)
{
int i;
/* FIXME: we need to figure out what else here might succeed; in
* particular, if it's a raw device but on LVM, we could probably make
* that succeed as well
*/
for (i = 0; i < vm->def->ndisks; i++) {
if ((vm->def->disks[i]->device == VIR_DOMAIN_DISK_DEVICE_LUN) ||
(vm->def->disks[i]->device == VIR_DOMAIN_DISK_DEVICE_DISK &&
STRNEQ_NULLABLE(vm->def->disks[i]->driverType, "qcow2"))) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
_("Disk '%s' does not support snapshotting"),
vm->def->disks[i]->src);
return false;
}
}
return true;
}
static int
qemuDomainSnapshotFSFreeze(struct qemud_driver *driver,
virDomainObjPtr vm) {
qemuDomainObjPrivatePtr priv = vm->privateData;
int freezed;
if (priv->agentError) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("QEMU guest agent is not "
"available due to an error"));
return -1;
}
if (!priv->agent) {
qemuReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
return -1;
}
qemuDomainObjEnterAgent(driver, vm);
freezed = qemuAgentFSFreeze(priv->agent);
qemuDomainObjExitAgent(driver, vm);
return freezed;
}
static int
qemuDomainSnapshotFSThaw(struct qemud_driver *driver,
virDomainObjPtr vm, bool report)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
int thawed;
virErrorPtr err = NULL;
if (priv->agentError) {
if (report)
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("QEMU guest agent is not "
"available due to an error"));
return -1;
}
if (!priv->agent) {
if (report)
qemuReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
return -1;
}
qemuDomainObjEnterAgent(driver, vm);
if (!report)
err = virGetLastError();
thawed = qemuAgentFSThaw(priv->agent);
if (!report) {
if (err)
virResetError(err);
else
virResetLastError();
}
qemuDomainObjExitAgent(driver, vm);
return thawed;
}
/* The domain is expected to be locked and inactive. */
static int
qemuDomainSnapshotCreateInactive(struct qemud_driver *driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap)
{
return qemuDomainSnapshotForEachQcow2(driver, vm, snap, "-c", false);
}
/* The domain is expected to be locked and active. */
static int
qemuDomainSnapshotCreateActive(virConnectPtr conn,
struct qemud_driver *driver,
virDomainObjPtr *vmptr,
virDomainSnapshotObjPtr snap,
unsigned int flags)
{
virDomainObjPtr vm = *vmptr;
qemuDomainObjPrivatePtr priv = vm->privateData;
bool resume = false;
int ret = -1;
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
return -1;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto cleanup;
}
}
qemuDomainObjEnterMonitorWithDriver(driver, vm);
ret = qemuMonitorCreateSnapshot(priv->mon, snap->def->name);
qemuDomainObjExitMonitorWithDriver(driver, vm);
if (ret < 0)
goto cleanup;
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, 0, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT);
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;
if (event)
qemuDomainEventQueue(driver, event);
}
cleanup:
if (resume && virDomainObjIsActive(vm) &&
qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_NONE) < 0 &&
virGetLastError() == NULL) {
qemuReportError(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;
}
return ret;
}
static int
qemuDomainSnapshotDiskPrepare(virDomainObjPtr vm, virDomainSnapshotDefPtr def,
unsigned int *flags)
{
int ret = -1;
int i;
bool found = false;
bool active = virDomainObjIsActive(vm);
struct stat st;
bool allow_reuse = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT) != 0;
bool atomic = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC) != 0;
int external = 0;
qemuDomainObjPrivatePtr priv = vm->privateData;
for (i = 0; i < def->ndisks; i++) {
virDomainSnapshotDiskDefPtr disk = &def->disks[i];
switch (disk->snapshot) {
case VIR_DOMAIN_DISK_SNAPSHOT_INTERNAL:
if (active) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("active qemu domains require external disk "
"snapshots; disk %s requested internal"),
disk->name);
goto cleanup;
}
if (!vm->def->disks[i]->driverType ||
STRNEQ(vm->def->disks[i]->driverType, "qcow2")) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("internal snapshot for disk %s unsupported "
"for storage type %s"),
disk->name,
NULLSTR(vm->def->disks[i]->driverType));
goto cleanup;
}
found = true;
break;
case VIR_DOMAIN_DISK_SNAPSHOT_EXTERNAL:
if (!disk->driverType) {
if (!(disk->driverType = strdup("qcow2"))) {
virReportOOMError();
goto cleanup;
}
} else if (STRNEQ(disk->driverType, "qcow2")) {
/* XXX We should also support QED */
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("external snapshot format for disk %s "
"is unsupported: %s"),
disk->name, disk->driverType);
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 (!(S_ISBLK(st.st_mode) || allow_reuse)) {
qemuReportError(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;
}
found = true;
external++;
break;
case VIR_DOMAIN_DISK_SNAPSHOT_NO:
break;
case VIR_DOMAIN_DISK_SNAPSHOT_DEFAULT:
default:
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unexpected code path"));
goto cleanup;
}
}
if (!found) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("disk snapshots require at least one disk to be "
"selected for snapshot"));
goto cleanup;
}
if (active) {
if (external == 1 ||
qemuCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION)) {
*flags |= VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC;
} else if (atomic && external > 1) {
qemuReportError(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(struct qemud_driver *driver,
virDomainObjPtr vm,
virDomainSnapshotDiskDefPtr snap,
virDomainDiskDefPtr disk,
virDomainDiskDefPtr persistDisk,
virJSONValuePtr actions)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
char *device = NULL;
char *source = NULL;
char *driverType = NULL;
char *persistSource = NULL;
char *persistDriverType = NULL;
int ret = -1;
int fd = -1;
char *origsrc = NULL;
char *origdriver = NULL;
bool need_unlink = false;
if (snap->snapshot != VIR_DOMAIN_DISK_SNAPSHOT_EXTERNAL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unexpected code path"));
return -1;
}
if (virAsprintf(&device, "drive-%s", disk->info.alias) < 0 ||
!(source = strdup(snap->file)) ||
(STRNEQ_NULLABLE(disk->driverType, "qcow2") &&
!(driverType = strdup("qcow2"))) ||
(persistDisk &&
(!(persistSource = strdup(source)) ||
(STRNEQ_NULLABLE(persistDisk->driverType, "qcow2") &&
!(persistDriverType = strdup("qcow2")))))) {
virReportOOMError();
goto cleanup;
}
/* create the stub file and set selinux labels; manipulate disk in
* place, in a way that can be reverted on failure. */
fd = qemuOpenFile(driver, source, O_WRONLY | O_TRUNC | O_CREAT,
&need_unlink, NULL);
if (fd < 0)
goto cleanup;
VIR_FORCE_CLOSE(fd);
origsrc = disk->src;
disk->src = source;
origdriver = disk->driverType;
disk->driverType = (char *) "raw"; /* Don't want to probe backing files */
if (virDomainLockDiskAttach(driver->lockManager, vm, disk) < 0)
goto cleanup;
if (virSecurityManagerSetImageLabel(driver->securityManager, vm->def,
disk) < 0) {
if (virDomainLockDiskDetach(driver->lockManager, vm, disk) < 0)
VIR_WARN("Unable to release lock on %s", source);
goto cleanup;
}
disk->src = origsrc;
origsrc = NULL;
disk->driverType = origdriver;
origdriver = NULL;
/* create the actual snapshot */
ret = qemuMonitorDiskSnapshot(priv->mon, actions, device, source);
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;
if (driverType) {
VIR_FREE(disk->driverType);
disk->driverType = driverType;
driverType = NULL;
}
if (persistDisk) {
VIR_FREE(persistDisk->src);
persistDisk->src = persistSource;
persistSource = NULL;
if (persistDriverType) {
VIR_FREE(persistDisk->driverType);
persistDisk->driverType = persistDriverType;
persistDriverType = NULL;
}
}
cleanup:
if (origsrc) {
disk->src = origsrc;
disk->driverType = origdriver;
}
if (need_unlink && unlink(source))
VIR_WARN("unable to unlink just-created %s", source);
VIR_FREE(device);
VIR_FREE(source);
VIR_FREE(driverType);
VIR_FREE(persistSource);
VIR_FREE(persistDriverType);
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(struct qemud_driver *driver,
virDomainObjPtr vm,
virDomainDiskDefPtr origdisk,
virDomainDiskDefPtr disk,
virDomainDiskDefPtr persistDisk,
bool need_unlink)
{
char *source = NULL;
char *driverType = NULL;
char *persistSource = NULL;
char *persistDriverType = NULL;
struct stat st;
if (!(source = strdup(origdisk->src)) ||
(origdisk->driverType &&
!(driverType = strdup(origdisk->driverType))) ||
(persistDisk &&
(!(persistSource = strdup(source)) ||
(driverType && !(persistDriverType = strdup(driverType)))))) {
virReportOOMError();
goto cleanup;
}
if (virSecurityManagerRestoreImageLabel(driver->securityManager,
vm->def, disk) < 0)
VIR_WARN("Unable to restore security label on %s", disk->src);
if (virDomainLockDiskDetach(driver->lockManager, vm, disk) < 0)
VIR_WARN("Unable to release lock on %s", disk->src);
if (need_unlink && stat(disk->src, &st) == 0 &&
st.st_size == 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;
VIR_FREE(disk->driverType);
if (driverType) {
disk->driverType = driverType;
driverType = NULL;
}
if (persistDisk) {
VIR_FREE(persistDisk->src);
persistDisk->src = persistSource;
persistSource = NULL;
VIR_FREE(persistDisk->driverType);
if (persistDriverType) {
persistDisk->driverType = persistDriverType;
persistDriverType = NULL;
}
}
cleanup:
VIR_FREE(source);
VIR_FREE(driverType);
VIR_FREE(persistSource);
VIR_FREE(persistDriverType);
}
/* The domain is expected to be locked and active. */
static int
qemuDomainSnapshotCreateDiskActive(virConnectPtr conn,
struct qemud_driver *driver,
virDomainObjPtr *vmptr,
virDomainSnapshotObjPtr snap,
unsigned int flags)
{
virDomainObjPtr vm = *vmptr;
qemuDomainObjPrivatePtr priv = vm->privateData;
virJSONValuePtr actions = NULL;
bool resume = false;
int ret = -1;
int i;
bool persist = false;
int thaw = 0; /* 1 if freeze succeeded, -1 if freeze failed */
bool atomic = (flags & VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC) != 0;
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
return -1;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
/* 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(driver, vm) < 0) {
/* helper reported the error */
thaw = -1;
goto endjob;
} else {
thaw = 1;
}
}
/* For 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 qemuDomainSnapshotDiskPrepare, 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 (!atomic && 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)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto cleanup;
}
}
if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION)) {
actions = virJSONValueNewArray();
if (!actions) {
virReportOOMError();
goto cleanup;
}
}
/* No way to roll back if first disk succeeds but later disks
* fail, unless we have transaction support.
* Based on earlier qemuDomainSnapshotDiskPrepare, all
* disks in this list are now either SNAPSHOT_NO, or
* SNAPSHOT_EXTERNAL with a valid file name and qcow2 format. */
qemuDomainObjEnterMonitorWithDriver(driver, vm);
for (i = 0; i < snap->def->ndisks; i++) {
virDomainDiskDefPtr persistDisk = NULL;
if (snap->def->disks[i].snapshot == VIR_DOMAIN_DISK_SNAPSHOT_NO)
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);
if (ret < 0)
break;
}
if (actions) {
if (ret == 0)
ret = qemuMonitorTransaction(priv->mon, 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_DISK_SNAPSHOT_NO)
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);
}
}
}
qemuDomainObjExitMonitorWithDriver(driver, vm);
if (ret < 0)
goto cleanup;
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, 0, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT);
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;
thaw = 0;
vm = NULL;
if (event)
qemuDomainEventQueue(driver, event);
}
cleanup:
if (resume && virDomainObjIsActive(vm)) {
if (qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_UNPAUSED,
QEMU_ASYNC_JOB_NONE) < 0 &&
virGetLastError() == NULL) {
qemuReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("resuming after snapshot failed"));
goto endjob;
}
}
if (vm && (ret == 0 ||
!qemuCapsGet(priv->qemuCaps, QEMU_CAPS_TRANSACTION))) {
if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0 ||
(persist &&
virDomainSaveConfig(driver->configDir, vm->newDef) < 0))
ret = -1;
}
endjob:
if (vm && thaw != 0 &&
qemuDomainSnapshotFSThaw(driver, vm, thaw > 0) < 0) {
/* helper reported the error, if it was needed */
if (thaw > 0)
ret = -1;
}
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;
}
return ret;
}
static virDomainSnapshotPtr
qemuDomainSnapshotCreateXML(virDomainPtr domain,
const char *xmlDesc,
unsigned int flags)
{
struct qemud_driver *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 = 0;
virDomainSnapshotObjPtr other = 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, NULL);
if ((flags & VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE) &&
!(flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY)) {
qemuReportError(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;
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY)
parse_flags |= VIR_DOMAIN_SNAPSHOT_PARSE_DISKS;
qemuDriverLock(driver);
virUUIDFormat(domain->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuProcessAutoDestroyActive(driver, vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is marked for auto destroy"));
goto cleanup;
}
if (!vm->persistent && (flags & VIR_DOMAIN_SNAPSHOT_CREATE_HALT)) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot halt after transient domain snapshot"));
goto cleanup;
}
if (!(def = virDomainSnapshotDefParseString(xmlDesc, driver->caps,
QEMU_EXPECTED_VIRT_TYPES,
parse_flags)))
goto cleanup;
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE) {
/* Prevent circular chains */
if (def->parent) {
if (STREQ(def->name, def->parent)) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("cannot set snapshot %s as its own parent"),
def->name);
goto cleanup;
}
other = virDomainSnapshotFindByName(&vm->snapshots, def->parent);
if (!other) {
qemuReportError(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)) {
qemuReportError(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 (def->dom &&
memcmp(def->dom->uuid, domain->uuid, VIR_UUID_BUFLEN)) {
qemuReportError(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)) {
qemuReportError(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)) {
qemuReportError(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 (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(&vm->snapshots, other);
virDomainSnapshotDefFree(other->def);
other->def = NULL;
snap = other;
}
if (def->state == VIR_DOMAIN_DISK_SNAPSHOT && def->dom) {
if (virDomainSnapshotAlignDisks(def,
VIR_DOMAIN_DISK_SNAPSHOT_EXTERNAL,
false) < 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)) ||
!(def->dom = virDomainDefParseString(driver->caps, xml,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE)))
goto cleanup;
if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) {
if (virDomainSnapshotAlignDisks(def,
VIR_DOMAIN_DISK_SNAPSHOT_EXTERNAL,
false) < 0)
goto cleanup;
if (qemuDomainSnapshotDiskPrepare(vm, def, &flags) < 0)
goto cleanup;
def->state = VIR_DOMAIN_DISK_SNAPSHOT;
} else {
/* In a perfect world, we would allow qemu to tell us this.
* The problem is that qemu only does this check
* device-by-device; so if you had a domain that booted from a
* large qcow2 device, but had a secondary raw device
* attached, you wouldn't find out that you can't snapshot
* your guest until *after* it had spent the time to snapshot
* the boot device. This is probably a bug in qemu, but we'll
* work around it here for now.
*/
if (!qemuDomainSnapshotIsAllowed(vm))
goto cleanup;
def->state = virDomainObjGetState(vm, NULL);
}
}
if (snap)
snap->def = def;
else 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)) {
snap->def->parent = strdup(vm->current_snapshot->def->name);
if (snap->def->parent == NULL) {
virReportOOMError();
goto cleanup;
}
}
if (update_current) {
vm->current_snapshot->def->current = false;
if (qemuDomainSnapshotWriteMetadata(vm, vm->current_snapshot,
driver->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 (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) {
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("disk snapshots of inactive domains not "
"implemented yet"));
goto cleanup;
}
if (qemuDomainSnapshotCreateDiskActive(domain->conn, driver,
&vm, snap, flags) < 0)
goto cleanup;
} else if (!virDomainObjIsActive(vm)) {
if (qemuDomainSnapshotCreateInactive(driver, vm, snap) < 0)
goto cleanup;
} else {
if (qemuDomainSnapshotCreateActive(domain->conn, driver,
&vm, snap, flags) < 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,
driver->snapshotDir) < 0) {
VIR_WARN("unable to save metadata for snapshot %s",
snap->def->name);
} else {
if (update_current)
vm->current_snapshot = snap;
if (snap->def->parent) {
other = virDomainSnapshotFindByName(&vm->snapshots,
snap->def->parent);
snap->parent = other;
other->nchildren++;
snap->sibling = other->first_child;
other->first_child = snap;
} else {
vm->snapshots.nroots++;
snap->sibling = vm->snapshots.first_root;
vm->snapshots.first_root = snap;
}
}
} else if (snap) {
virDomainSnapshotObjListRemove(&vm->snapshots, snap);
}
virDomainObjUnlock(vm);
}
virDomainSnapshotDefFree(def);
VIR_FREE(xml);
qemuDriverUnlock(driver);
return snapshot;
}
static int qemuDomainSnapshotListNames(virDomainPtr domain, char **names,
int nameslen,
unsigned int flags)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_ROOTS |
VIR_DOMAIN_SNAPSHOT_LIST_METADATA |
VIR_DOMAIN_SNAPSHOT_LIST_LEAVES, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
n = virDomainSnapshotObjListGetNames(&vm->snapshots, names, nameslen,
flags);
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return n;
}
static int qemuDomainSnapshotNum(virDomainPtr domain,
unsigned int flags)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_ROOTS |
VIR_DOMAIN_SNAPSHOT_LIST_METADATA |
VIR_DOMAIN_SNAPSHOT_LIST_LEAVES, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
/* All qemu snapshots have libvirt metadata, so
* VIR_DOMAIN_SNAPSHOT_LIST_METADATA makes no difference to our
* answer. */
n = virDomainSnapshotObjListNum(&vm->snapshots, flags);
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return n;
}
static int
qemuDomainSnapshotListChildrenNames(virDomainSnapshotPtr snapshot,
char **names,
int nameslen,
unsigned int flags)
{
struct qemud_driver *driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainSnapshotObjPtr snap = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS |
VIR_DOMAIN_SNAPSHOT_LIST_METADATA |
VIR_DOMAIN_SNAPSHOT_LIST_LEAVES, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, snapshot->domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(snapshot->domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
snap = virDomainSnapshotFindByName(&vm->snapshots, snapshot->name);
if (!snap) {
qemuReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("no domain snapshot with matching name '%s'"),
snapshot->name);
goto cleanup;
}
n = virDomainSnapshotObjListGetNamesFrom(snap, names, nameslen, flags);
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return n;
}
static int
qemuDomainSnapshotNumChildren(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
struct qemud_driver *driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm = NULL;
virDomainSnapshotObjPtr snap = NULL;
int n = -1;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS |
VIR_DOMAIN_SNAPSHOT_LIST_METADATA |
VIR_DOMAIN_SNAPSHOT_LIST_LEAVES, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, snapshot->domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(snapshot->domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
snap = virDomainSnapshotFindByName(&vm->snapshots, snapshot->name);
if (!snap) {
qemuReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("no domain snapshot with matching name '%s'"),
snapshot->name);
goto cleanup;
}
/* All qemu snapshots have libvirt metadata, so
* VIR_DOMAIN_SNAPSHOT_LIST_METADATA makes no difference to our
* answer. */
n = virDomainSnapshotObjListNumFrom(snap, flags);
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return n;
}
static virDomainSnapshotPtr qemuDomainSnapshotLookupByName(virDomainPtr domain,
const char *name,
unsigned int flags)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm;
virDomainSnapshotObjPtr snap = NULL;
virDomainSnapshotPtr snapshot = NULL;
virCheckFlags(0, NULL);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
snap = virDomainSnapshotFindByName(&vm->snapshots, name);
if (!snap) {
qemuReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("no snapshot with matching name '%s'"), name);
goto cleanup;
}
snapshot = virGetDomainSnapshot(domain, snap->def->name);
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return snapshot;
}
static int qemuDomainHasCurrentSnapshot(virDomainPtr domain,
unsigned int flags)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
ret = (vm->current_snapshot != NULL);
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static virDomainSnapshotPtr
qemuDomainSnapshotGetParent(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
struct qemud_driver *driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm;
virDomainSnapshotObjPtr snap = NULL;
virDomainSnapshotPtr parent = NULL;
virCheckFlags(0, NULL);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, snapshot->domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(snapshot->domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
snap = virDomainSnapshotFindByName(&vm->snapshots, snapshot->name);
if (!snap) {
qemuReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("no domain snapshot with matching name '%s'"),
snapshot->name);
goto cleanup;
}
if (!snap->def->parent) {
qemuReportError(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)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return parent;
}
static virDomainSnapshotPtr qemuDomainSnapshotCurrent(virDomainPtr domain,
unsigned int flags)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm;
virDomainSnapshotPtr snapshot = NULL;
virCheckFlags(0, NULL);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!vm->current_snapshot) {
qemuReportError(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)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return snapshot;
}
static char *qemuDomainSnapshotGetXMLDesc(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
struct qemud_driver *driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm = NULL;
char *xml = NULL;
virDomainSnapshotObjPtr snap = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
virCheckFlags(VIR_DOMAIN_XML_SECURE, NULL);
qemuDriverLock(driver);
virUUIDFormat(snapshot->domain->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, snapshot->domain->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
snap = virDomainSnapshotFindByName(&vm->snapshots, snapshot->name);
if (!snap) {
qemuReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("no domain snapshot with matching name '%s'"),
snapshot->name);
goto cleanup;
}
xml = virDomainSnapshotDefFormat(uuidstr, snap->def, flags, 0);
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return xml;
}
/* The domain is expected to be locked and inactive. */
static int
qemuDomainSnapshotRevertInactive(struct qemud_driver *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)
{
struct qemud_driver *driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
virDomainSnapshotObjPtr snap = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
virDomainEventPtr event = NULL;
virDomainEventPtr event2 = NULL;
int detail;
qemuDomainObjPrivatePtr priv;
int rc;
virDomainDefPtr config = 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.
*/
qemuDriverLock(driver);
virUUIDFormat(snapshot->domain->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, snapshot->domain->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
snap = virDomainSnapshotFindByName(&vm->snapshots, snapshot->name);
if (!snap) {
qemuReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("no domain snapshot with matching name '%s'"),
snapshot->name);
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) {
qemuReportError(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) {
qemuReportError(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) {
qemuReportError(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))) {
qemuReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY,
_("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,
driver->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. Easiest way is by a round trip through xml.
*
* XXX Should domain snapshots track live xml rather
* than inactive xml? */
snap->def->current = true;
if (snap->def->dom) {
char *xml;
if (!(xml = virDomainDefFormat(snap->def->dom,
(VIR_DOMAIN_XML_INACTIVE |
VIR_DOMAIN_XML_SECURE))))
goto cleanup;
config = virDomainDefParseString(driver->caps, xml,
QEMU_EXPECTED_VIRT_TYPES,
VIR_DOMAIN_XML_INACTIVE);
VIR_FREE(xml);
if (!config)
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(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)
qemuReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY, "%s",
err->str2);
goto endjob;
}
virResetError(err);
qemuProcessStop(driver, vm, 0,
VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT);
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)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto endjob;
}
}
qemuDomainObjEnterMonitorWithDriver(driver, vm);
rc = qemuMonitorLoadSnapshot(priv->mon, snap->def->name);
qemuDomainObjExitMonitorWithDriver(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);
} else {
/* Transitions 2, 3 */
load:
was_stopped = true;
if (config)
virDomainObjAssignDef(vm, config, false);
rc = qemuProcessStart(snapshot->domain->conn, driver, vm, NULL,
false, true, false, -1, NULL, snap,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE);
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)) {
qemuReportError(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, 0, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT);
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);
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;
if (event)
qemuDomainEventQueue(driver, event);
rc = qemuProcessStart(snapshot->domain->conn, driver, vm, NULL,
false, paused, false, -1, NULL, NULL,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE);
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,
driver->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)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
struct snap_reparent {
struct qemud_driver *driver;
virDomainSnapshotObjPtr parent;
virDomainObjPtr vm;
int err;
virDomainSnapshotObjPtr last;
};
static void
qemuDomainSnapshotReparentChildren(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *data)
{
virDomainSnapshotObjPtr snap = payload;
struct snap_reparent *rep = data;
if (rep->err < 0) {
return;
}
VIR_FREE(snap->def->parent);
snap->parent = rep->parent;
if (rep->parent) {
snap->def->parent = strdup(rep->parent->def->name);
if (snap->def->parent == NULL) {
virReportOOMError();
rep->err = -1;
return;
}
}
if (!snap->sibling)
rep->last = snap;
rep->err = qemuDomainSnapshotWriteMetadata(rep->vm, snap,
rep->driver->snapshotDir);
}
static int qemuDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
unsigned int flags)
{
struct qemud_driver *driver = snapshot->domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
virDomainSnapshotObjPtr snap = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
struct qemu_snap_remove rem;
struct snap_reparent rep;
bool metadata_only = !!(flags & VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY);
int external = 0;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN |
VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY |
VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY, -1);
qemuDriverLock(driver);
virUUIDFormat(snapshot->domain->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, snapshot->domain->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
snap = virDomainSnapshotFindByName(&vm->snapshots, snapshot->name);
if (!snap) {
qemuReportError(VIR_ERR_NO_DOMAIN_SNAPSHOT,
_("no domain snapshot with matching name '%s'"),
snapshot->name);
goto cleanup;
}
if (!(flags & VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY)) {
if (!(flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY) &&
snap->def->state == VIR_DOMAIN_DISK_SNAPSHOT)
external++;
if (flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN)
virDomainSnapshotForEachDescendant(snap,
qemuDomainSnapshotCountExternal,
&external);
if (external) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("deletion of %d external disk snapshots not "
"supported yet"), external);
goto cleanup;
}
}
if (qemuDomainObjBeginJobWithDriver(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,
driver->snapshotDir) < 0) {
qemuReportError(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.driver = driver;
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. */
if (snap->parent) {
snap->parent->nchildren += snap->nchildren;
rep.last->sibling = snap->parent->first_child;
snap->parent->first_child = snap->first_child;
} else {
vm->snapshots.nroots += snap->nchildren;
rep.last->sibling = vm->snapshots.first_root;
vm->snapshots.first_root = snap->first_child;
}
}
if (flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY) {
snap->nchildren = 0;
snap->first_child = NULL;
ret = 0;
} else {
virDomainSnapshotDropParent(&vm->snapshots, snap);
ret = qemuDomainSnapshotDiscard(driver, vm, snap, true, metadata_only);
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int qemuDomainMonitorCommand(virDomainPtr domain, const char *cmd,
char **result, unsigned int flags)
{
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
bool hmp;
virCheckFlags(VIR_DOMAIN_QEMU_MONITOR_COMMAND_HMP, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(domain->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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);
qemuDomainObjEnterMonitorWithDriver(driver, vm);
ret = qemuMonitorArbitraryCommand(priv->mon, cmd, result, hmp);
qemuDomainObjExitMonitorWithDriver(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static virDomainPtr qemuDomainAttach(virConnectPtr conn,
unsigned int pid_value,
unsigned int flags)
{
struct qemud_driver *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;
virCheckFlags(0, NULL);
qemuDriverLock(driver);
if (!(def = qemuParseCommandLinePid(driver->caps, pid,
&pidfile, &monConfig, &monJSON)))
goto cleanup;
if (!monConfig) {
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("No monitor connection for pid %u"), pid_value);
goto cleanup;
}
if (monConfig->type != VIR_DOMAIN_CHR_TYPE_UNIX) {
qemuReportError(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 (virDomainObjIsDuplicate(&driver->domains, def, 1) < 0)
goto cleanup;
if (qemudCanonicalizeMachine(driver, def) < 0)
goto cleanup;
if (qemuDomainAssignAddresses(def) < 0)
goto cleanup;
if (!(vm = virDomainAssignDef(driver->caps,
&driver->domains,
def, false)))
goto cleanup;
def = NULL;
if (qemuDomainObjBeginJobWithDriver(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);
virDomainChrSourceDefFree(monConfig);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
VIR_FREE(pidfile);
return dom;
}
static int
qemuDomainOpenConsole(virDomainPtr dom,
const char *dev_name,
virStreamPtr st,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
int ret = -1;
int i;
virDomainChrDefPtr chr = NULL;
qemuDomainObjPrivatePtr priv;
virCheckFlags(VIR_DOMAIN_CONSOLE_SAFE |
VIR_DOMAIN_CONSOLE_FORCE, -1);
qemuDriverLock(driver);
virUUIDFormat(dom->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(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) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find character device %s"),
NULLSTR(dev_name));
goto cleanup;
}
if (chr->source.type != VIR_DOMAIN_CHR_TYPE_PTY) {
qemuReportError(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 = virConsoleOpen(priv->cons,
chr->source.data.file.path,
st,
(flags & VIR_DOMAIN_CONSOLE_FORCE) != 0);
if (ret == 1) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
_("Active console session exists for this domain"));
ret = -1;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
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->type != VIR_DOMAIN_DISK_TYPE_BLOCK &&
disk->type != VIR_DOMAIN_DISK_TYPE_FILE)
goto cleanup;
if (disk->src) {
if (virAsprintf(&ret, "drive-%s", disk->info.alias) < 0) {
virReportOOMError();
return NULL;
}
}
cleanup:
if (!ret) {
qemuReportError(VIR_ERR_INVALID_ARG,
"%s", _("No device found for specified path"));
}
return ret;
}
static int
qemuDomainBlockJobImpl(virDomainPtr dom, const char *path, const char *base,
unsigned long bandwidth, virDomainBlockJobInfoPtr info,
int mode)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
char uuidstr[VIR_UUID_STRING_BUFLEN];
char *device = NULL;
int ret = -1;
qemuDriverLock(driver);
virUUIDFormat(dom->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
device = qemuDiskPathToAlias(vm, path, NULL);
if (!device) {
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
qemuDomainObjEnterMonitorWithDriver(driver, vm);
priv = vm->privateData;
/* XXX - add a qemu capability check, since only qemu 1.1 or newer
* supports the base argument.
* 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);
qemuDomainObjExitMonitorWithDriver(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
VIR_FREE(device);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainBlockJobAbort(virDomainPtr dom, const char *path, unsigned int flags)
{
virCheckFlags(0, -1);
return qemuDomainBlockJobImpl(dom, path, NULL, 0, NULL, BLOCK_JOB_ABORT);
}
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);
}
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);
}
static int
qemuDomainBlockRebase(virDomainPtr dom, const char *path, const char *base,
unsigned long bandwidth, unsigned int flags)
{
int ret;
virCheckFlags(0, -1);
ret = qemuDomainBlockJobImpl(dom, path, base, bandwidth, NULL,
BLOCK_JOB_PULL);
if (ret == 0 && bandwidth != 0)
ret = qemuDomainBlockJobImpl(dom, path, NULL, bandwidth, NULL,
BLOCK_JOB_SPEED);
return ret;
}
static int
qemuDomainBlockPull(virDomainPtr dom, const char *path, unsigned long bandwidth,
unsigned int flags)
{
return qemuDomainBlockRebase(dom, path, NULL, bandwidth, flags);
}
static int
qemuDomainOpenGraphics(virDomainPtr dom,
unsigned int idx,
int fd,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
int ret = -1;
qemuDomainObjPrivatePtr priv;
const char *protocol;
virCheckFlags(VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH, -1);
qemuDriverLock(driver);
virUUIDFormat(dom->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
priv = vm->privateData;
if (idx >= vm->def->ngraphics) {
qemuReportError(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:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Can only open VNC or SPICE graphics backends, not %s"),
virDomainGraphicsTypeToString(vm->def->graphics[idx]->type));
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
qemuDomainObjEnterMonitorWithDriver(driver, vm);
ret = qemuMonitorOpenGraphics(priv->mon, protocol, fd, "graphicsfd",
(flags & VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH) != 0);
qemuDomainObjExitMonitorWithDriver(driver, vm);
if (qemuDomainObjEndJob(driver, vm) == 0) {
vm = NULL;
goto cleanup;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainSetBlockIoTune(virDomainPtr dom,
const char *disk,
virTypedParameterPtr params,
int nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
virDomainDefPtr persistentDef = NULL;
virDomainBlockIoTuneInfo info;
virDomainBlockIoTuneInfo *oldinfo;
char uuidstr[VIR_UUID_STRING_BUFLEN];
const char *device = NULL;
int ret = -1;
int i;
int idx = -1;
bool set_bytes = false;
bool set_iops = false;
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));
qemuDriverLock(driver);
virUUIDFormat(dom->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
device = qemuDiskPathToAlias(vm, disk, &idx);
if (!device) {
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainLiveConfigHelperMethod(driver->caps, 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)) {
qemuReportError(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)) {
qemuReportError(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 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;
}
priv = vm->privateData;
qemuDomainObjEnterMonitorWithDriver(driver, vm);
ret = qemuMonitorSetBlockIoThrottle(priv->mon, device, &info);
qemuDomainObjExitMonitorWithDriver(driver, vm);
vm->def->disks[idx]->blkdeviotune = info;
if (ret < 0)
goto endjob;
}
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
sa_assert(persistentDef);
idx = virDomainDiskIndexByName(persistentDef, disk, true);
if (idx < 0)
goto endjob;
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(driver->configDir, persistentDef);
if (ret < 0) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("Write to config file failed"));
goto endjob;
}
}
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
VIR_FREE(device);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainGetBlockIoTune(virDomainPtr dom,
const char *disk,
virTypedParameterPtr params,
int *nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
virDomainDefPtr persistentDef = NULL;
virDomainBlockIoTuneInfo reply;
char uuidstr[VIR_UUID_STRING_BUFLEN];
const char *device = NULL;
int ret = -1;
int i;
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;
qemuDriverLock(driver);
virUUIDFormat(dom->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
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 (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (virDomainLiveConfigHelperMethod(driver->caps, vm, &flags,
&persistentDef) < 0)
goto endjob;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
priv = vm->privateData;
qemuDomainObjEnterMonitorWithDriver(driver, vm);
ret = qemuMonitorGetBlockIoThrottle(priv->mon, device, &reply);
qemuDomainObjExitMonitorWithDriver(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)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainGetDiskErrors(virDomainPtr dom,
virDomainDiskErrorPtr errors,
unsigned int nerrors,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm = NULL;
qemuDomainObjPrivatePtr priv;
char uuidstr[VIR_UUID_STRING_BUFLEN];
virHashTablePtr table = NULL;
int ret = -1;
int i;
int n = 0;
virCheckFlags(0, -1);
qemuDriverLock(driver);
virUUIDFormat(dom->uuid, uuidstr);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(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 (!(errors[n].disk = strdup(disk->dst))) {
virReportOOMError();
goto endjob;
}
errors[n].error = info->io_status;
n++;
}
}
ret = n;
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(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)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr persistentDef;
int ret = -1;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, 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 (metadata &&
!(vm->def->description = strdup(metadata)))
goto no_memory;
break;
case VIR_DOMAIN_METADATA_TITLE:
VIR_FREE(vm->def->title);
if (metadata &&
!(vm->def->title = strdup(metadata)))
goto no_memory;
break;
case VIR_DOMAIN_METADATA_ELEMENT:
qemuReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEmu driver does not support modifying"
"<metadata> element"));
goto cleanup;
break;
default:
qemuReportError(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 (metadata &&
!(persistentDef->description = strdup(metadata)))
goto no_memory;
break;
case VIR_DOMAIN_METADATA_TITLE:
VIR_FREE(persistentDef->title);
if (metadata &&
!(persistentDef->title = strdup(metadata)))
goto no_memory;
break;
case VIR_DOMAIN_METADATA_ELEMENT:
qemuReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU driver does not support"
"<metadata> element"));
goto cleanup;
default:
qemuReportError(VIR_ERR_INVALID_ARG, "%s",
_("unknown metadata type"));
goto cleanup;
break;
}
if (virDomainSaveConfig(driver->configDir, persistentDef) < 0)
goto cleanup;
}
ret = 0;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
no_memory:
virReportOOMError();
goto cleanup;
}
static char *
qemuDomainGetMetadata(virDomainPtr dom,
int type,
const char *uri ATTRIBUTE_UNUSED,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
virDomainDefPtr def;
char *ret = NULL;
char *field = NULL;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG, NULL);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (virDomainLiveConfigHelperMethod(driver->caps, 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:
qemuReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU driver does not support"
"<metadata> element"));
goto cleanup;
break;
default:
qemuReportError(VIR_ERR_INVALID_ARG, "%s",
_("unknown metadata type"));
goto cleanup;
break;
}
if (!field) {
qemuReportError(VIR_ERR_NO_DOMAIN_METADATA, "%s",
_("Requested metadata element is not present"));
goto cleanup;
}
if (!(ret = strdup(field))) {
virReportOOMError();
goto cleanup;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
/* qemuDomainGetCPUStats() with start_cpu == -1 */
static int
qemuDomainGetTotalcpuStats(virCgroupPtr group,
virTypedParameterPtr params,
int nparams)
{
unsigned long long cpu_time;
int ret;
if (nparams == 0) /* return supported number of params */
return QEMU_NB_TOTAL_CPU_STAT_PARAM;
/* entry 0 is cputime */
ret = virCgroupGetCpuacctUsage(group, &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(group, &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;
}
static int
qemuDomainGetPercpuStats(virDomainPtr domain,
virCgroupPtr group,
virTypedParameterPtr params,
unsigned int nparams,
int start_cpu,
unsigned int ncpus)
{
char *map = NULL;
int rv = -1;
int i, max_id;
char *pos;
char *buf = NULL;
virTypedParameterPtr ent;
int param_idx;
/* return the number of supported params */
if (nparams == 0 && ncpus != 0)
return QEMU_NB_PER_CPU_STAT_PARAM; /* only cpu_time is supported */
/* return percpu cputime in index 0 */
param_idx = 0;
/* to parse account file, we need "present" cpu map */
map = nodeGetCPUmap(domain->conn, &max_id, "present");
if (!map)
return rv;
if (ncpus == 0) { /* returns max cpu ID */
rv = max_id + 1;
goto cleanup;
}
if (start_cpu > max_id) {
qemuReportError(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(group, &buf))
goto cleanup;
pos = buf;
memset(params, 0, nparams * ncpus);
if (max_id - start_cpu > ncpus - 1)
max_id = start_cpu + ncpus - 1;
for (i = 0; i <= max_id; i++) {
unsigned long long cpu_time;
if (!map[i]) {
cpu_time = 0;
} else if (virStrToLong_ull(pos, &pos, 10, &cpu_time) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cpuacct parse error"));
goto cleanup;
}
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;
}
rv = param_idx + 1;
cleanup:
VIR_FREE(buf);
VIR_FREE(map);
return rv;
}
static int
qemuDomainGetCPUStats(virDomainPtr domain,
virTypedParameterPtr params,
unsigned int nparams,
int start_cpu,
unsigned int ncpus,
unsigned int flags)
{
struct qemud_driver *driver = domain->conn->privateData;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
int ret = -1;
bool isActive;
virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, domain->uuid);
if (vm == NULL) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("No such domain %s"), domain->uuid);
goto cleanup;
}
isActive = virDomainObjIsActive(vm);
if (!isActive) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto cleanup;
}
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPUACCT)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPUACCT controller is not mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"), vm->def->name);
goto cleanup;
}
if (start_cpu == -1)
ret = qemuDomainGetTotalcpuStats(group, params, nparams);
else
ret = qemuDomainGetPercpuStats(domain, group, params, nparams,
start_cpu, ncpus);
cleanup:
virCgroupFree(&group);
if (vm)
virDomainObjUnlock(vm);
qemuDriverUnlock(driver);
return ret;
}
static int
qemuDomainPMSuspendForDuration(virDomainPtr dom,
unsigned int target,
unsigned long long duration,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm;
int ret = -1;
virCheckFlags(0, -1);
if (duration) {
qemuReportError(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)) {
qemuReportError(VIR_ERR_INVALID_ARG,
_("Unknown suspend target: %u"),
target);
return -1;
}
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
priv = vm->privateData;
if (!qemuCapsGet(priv->qemuCaps, QEMU_CAPS_WAKEUP) &&
(target == VIR_NODE_SUSPEND_TARGET_MEM ||
target == VIR_NODE_SUSPEND_TARGET_HYBRID)) {
qemuReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("Unable to suspend domain due to "
"missing system_wakeup monitor command"));
goto cleanup;
}
if (priv->agentError) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("QEMU guest agent is not available due to an error"));
goto cleanup;
}
if (!priv->agent) {
qemuReportError(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)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
qemuDomainObjEnterAgent(driver, vm);
ret = qemuAgentSuspend(priv->agent, target);
qemuDomainObjExitAgent(driver, vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
cleanup:
if (vm)
virDomainObjUnlock(vm);
return ret;
}
static int
qemuDomainPMWakeup(virDomainPtr dom,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virCheckFlags(0, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
qemuDriverUnlock(driver);
if (!vm) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(dom->uuid, uuidstr);
qemuReportError(VIR_ERR_NO_DOMAIN,
_("no domain with matching uuid '%s'"), uuidstr);
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto endjob;
}
priv = vm->privateData;
if (!qemuCapsGet(priv->qemuCaps, QEMU_CAPS_WAKEUP)) {
qemuReportError(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)
virDomainObjUnlock(vm);
return ret;
}
static virDriver qemuDriver = {
.no = VIR_DRV_QEMU,
.name = "QEMU",
.open = qemudOpen, /* 0.2.0 */
.close = qemudClose, /* 0.2.0 */
.supports_feature = qemudSupportsFeature, /* 0.5.0 */
.type = qemudGetType, /* 0.2.0 */
.version = qemudGetVersion, /* 0.2.0 */
.getHostname = virGetHostname, /* 0.3.3 */
.getSysinfo = qemuGetSysinfo, /* 0.8.8 */
.getMaxVcpus = qemudGetMaxVCPUs, /* 0.2.1 */
.nodeGetInfo = nodeGetInfo, /* 0.2.0 */
.getCapabilities = qemudGetCapabilities, /* 0.2.1 */
.listDomains = qemudListDomains, /* 0.2.0 */
.numOfDomains = qemudNumDomains, /* 0.2.0 */
.domainCreateXML = qemudDomainCreate, /* 0.2.0 */
.domainLookupByID = qemudDomainLookupByID, /* 0.2.0 */
.domainLookupByUUID = qemudDomainLookupByUUID, /* 0.2.0 */
.domainLookupByName = qemudDomainLookupByName, /* 0.2.0 */
.domainSuspend = qemudDomainSuspend, /* 0.2.0 */
.domainResume = qemudDomainResume, /* 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 = qemudDomainGetOSType, /* 0.2.2 */
.domainGetMaxMemory = qemuDomainGetMaxMemory, /* 0.4.2 */
.domainSetMaxMemory = qemudDomainSetMaxMemory, /* 0.4.2 */
.domainSetMemory = qemudDomainSetMemory, /* 0.4.2 */
.domainSetMemoryFlags = qemudDomainSetMemoryFlags, /* 0.9.0 */
.domainSetMemoryParameters = qemuDomainSetMemoryParameters, /* 0.8.5 */
.domainGetMemoryParameters = qemuDomainGetMemoryParameters, /* 0.8.5 */
.domainSetBlkioParameters = qemuDomainSetBlkioParameters, /* 0.9.0 */
.domainGetBlkioParameters = qemuDomainGetBlkioParameters, /* 0.9.0 */
.domainGetInfo = qemudDomainGetInfo, /* 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 = qemudDomainCoreDump, /* 0.7.0 */
.domainScreenshot = qemuDomainScreenshot, /* 0.9.2 */
.domainSetVcpus = qemuDomainSetVcpus, /* 0.4.4 */
.domainSetVcpusFlags = qemuDomainSetVcpusFlags, /* 0.8.5 */
.domainGetVcpusFlags = qemudDomainGetVcpusFlags, /* 0.8.5 */
.domainPinVcpu = qemudDomainPinVcpu, /* 0.4.4 */
.domainPinVcpuFlags = qemudDomainPinVcpuFlags, /* 0.9.3 */
.domainGetVcpuPinInfo = qemudDomainGetVcpuPinInfo, /* 0.9.3 */
.domainGetVcpus = qemudDomainGetVcpus, /* 0.4.4 */
.domainGetMaxVcpus = qemudDomainGetMaxVcpus, /* 0.4.4 */
.domainGetSecurityLabel = qemudDomainGetSecurityLabel, /* 0.6.1 */
.nodeGetSecurityModel = qemudNodeGetSecurityModel, /* 0.6.1 */
.domainGetXMLDesc = qemuDomainGetXMLDesc, /* 0.2.0 */
.domainXMLFromNative = qemuDomainXMLFromNative, /* 0.6.4 */
.domainXMLToNative = qemuDomainXMLToNative, /* 0.6.4 */
.listDefinedDomains = qemudListDefinedDomains, /* 0.2.0 */
.numOfDefinedDomains = qemudNumDefinedDomains, /* 0.2.0 */
.domainCreate = qemuDomainStart, /* 0.2.0 */
.domainCreateWithFlags = qemuDomainStartWithFlags, /* 0.8.2 */
.domainDefineXML = qemudDomainDefine, /* 0.2.0 */
.domainUndefine = qemudDomainUndefine, /* 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 = qemudDomainGetAutostart, /* 0.2.1 */
.domainSetAutostart = qemudDomainSetAutostart, /* 0.2.1 */
.domainGetSchedulerType = qemuGetSchedulerType, /* 0.7.0 */
.domainGetSchedulerParameters = qemuGetSchedulerParameters, /* 0.7.0 */
.domainGetSchedulerParametersFlags = qemuGetSchedulerParametersFlags, /* 0.9.2 */
.domainSetSchedulerParameters = qemuSetSchedulerParameters, /* 0.7.0 */
.domainSetSchedulerParametersFlags = qemuSetSchedulerParametersFlags, /* 0.9.2 */
.domainMigratePerform = qemudDomainMigratePerform, /* 0.5.0 */
.domainBlockResize = qemuDomainBlockResize, /* 0.9.8 */
.domainBlockStats = qemuDomainBlockStats, /* 0.4.1 */
.domainBlockStatsFlags = qemuDomainBlockStatsFlags, /* 0.9.5 */
.domainInterfaceStats = qemudDomainInterfaceStats, /* 0.4.1 */
.domainMemoryStats = qemudDomainMemoryStats, /* 0.7.5 */
.domainBlockPeek = qemudDomainBlockPeek, /* 0.4.4 */
.domainMemoryPeek = qemudDomainMemoryPeek, /* 0.4.4 */
.domainGetBlockInfo = qemuDomainGetBlockInfo, /* 0.8.1 */
.nodeGetCPUStats = nodeGetCPUStats, /* 0.9.3 */
.nodeGetMemoryStats = nodeGetMemoryStats, /* 0.9.3 */
.nodeGetCellsFreeMemory = nodeGetCellsFreeMemory, /* 0.4.4 */
.nodeGetFreeMemory = nodeGetFreeMemory, /* 0.4.4 */
.domainEventRegister = qemuDomainEventRegister, /* 0.5.0 */
.domainEventDeregister = qemuDomainEventDeregister, /* 0.5.0 */
.domainMigratePrepare2 = qemudDomainMigratePrepare2, /* 0.5.0 */
.domainMigrateFinish2 = qemudDomainMigrateFinish2, /* 0.5.0 */
.nodeDeviceDettach = qemudNodeDeviceDettach, /* 0.6.1 */
.nodeDeviceReAttach = qemudNodeDeviceReAttach, /* 0.6.1 */
.nodeDeviceReset = qemudNodeDeviceReset, /* 0.6.1 */
.domainMigratePrepareTunnel = qemudDomainMigratePrepareTunnel, /* 0.7.2 */
.isEncrypted = qemuIsEncrypted, /* 0.7.3 */
.isSecure = qemuIsSecure, /* 0.7.3 */
.domainIsActive = qemuDomainIsActive, /* 0.7.3 */
.domainIsPersistent = qemuDomainIsPersistent, /* 0.7.3 */
.domainIsUpdated = qemuDomainIsUpdated, /* 0.8.6 */
.cpuCompare = qemuCPUCompare, /* 0.7.5 */
.cpuBaseline = qemuCPUBaseline, /* 0.7.7 */
.domainGetJobInfo = qemuDomainGetJobInfo, /* 0.7.7 */
.domainAbortJob = qemuDomainAbortJob, /* 0.7.7 */
.domainMigrateSetMaxDowntime = qemuDomainMigrateSetMaxDowntime, /* 0.8.0 */
.domainMigrateSetMaxSpeed = qemuDomainMigrateSetMaxSpeed, /* 0.9.0 */
.domainMigrateGetMaxSpeed = qemuDomainMigrateGetMaxSpeed, /* 0.9.5 */
.domainEventRegisterAny = qemuDomainEventRegisterAny, /* 0.8.0 */
.domainEventDeregisterAny = qemuDomainEventDeregisterAny, /* 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 */
.domainSnapshotNumChildren = qemuDomainSnapshotNumChildren, /* 0.9.7 */
.domainSnapshotListChildrenNames = qemuDomainSnapshotListChildrenNames, /* 0.9.7 */
.domainSnapshotLookupByName = qemuDomainSnapshotLookupByName, /* 0.8.0 */
.domainHasCurrentSnapshot = qemuDomainHasCurrentSnapshot, /* 0.8.0 */
.domainSnapshotGetParent = qemuDomainSnapshotGetParent, /* 0.9.7 */
.domainSnapshotCurrent = qemuDomainSnapshotCurrent, /* 0.8.0 */
.domainRevertToSnapshot = qemuDomainRevertToSnapshot, /* 0.8.0 */
.domainSnapshotDelete = qemuDomainSnapshotDelete, /* 0.8.0 */
.qemuDomainMonitorCommand = qemuDomainMonitorCommand, /* 0.8.3 */
.qemuDomainAttach = qemuDomainAttach, /* 0.9.4 */
.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 */
.isAlive = qemuIsAlive, /* 0.9.8 */
.nodeSuspendForDuration = nodeSuspendForDuration, /* 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 */
};
static virStateDriver qemuStateDriver = {
.name = "QEMU",
.initialize = qemudStartup,
.cleanup = qemudShutdown,
.reload = qemudReload,
.active = qemudActive,
};
static void
qemuVMDriverLock(void) {
qemuDriverLock(qemu_driver);
};
static void
qemuVMDriverUnlock(void) {
qemuDriverUnlock(qemu_driver);
};
static int
qemuVMFilterRebuild(virConnectPtr conn ATTRIBUTE_UNUSED,
virHashIterator iter, void *data)
{
virHashForEach(qemu_driver->domains.objs, iter, data);
return 0;
}
static virNWFilterCallbackDriver qemuCallbackDriver = {
.name = "QEMU",
.vmFilterRebuild = qemuVMFilterRebuild,
.vmDriverLock = qemuVMDriverLock,
.vmDriverUnlock = qemuVMDriverUnlock,
};
int qemuRegister(void) {
virRegisterDriver(&qemuDriver);
virRegisterStateDriver(&qemuStateDriver);
virNWFilterRegisterCallbackDriver(&qemuCallbackDriver);
return 0;
}
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