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qemu: Migration job on source daemon

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Make MIGRATION_OUT use the new helper methods.

This also introduces new protection to migration v3 process: the
migration job is held from Begin to Confirm to avoid changes to a domain
during migration (esp. between Begin and Perform phases). This change is
automatically applied to p2p and tunneled migrations. For normal
migration, this requires support from a client. In other words, if an
old (pre 0.9.4) client starts normal migration of a domain, the domain
will not be protected against changes between Begin and Perform steps.
This commit is contained in:
Jiri Denemark 2011-07-19 02:27:32 +02:00 committed by Eric Blake
parent eeb008dbfc
commit d58e91a812
6 changed files with 340 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/libvirt/libvirt.h.in
View File

@ -676,6 +676,9 @@ typedef enum {
VIR_MIGRATE_NON_SHARED_DISK = (1 << 6), /* migration with non-shared storage with full disk copy */
VIR_MIGRATE_NON_SHARED_INC = (1 << 7), /* migration with non-shared storage with incremental copy */
/* (same base image shared between source and destination) */
VIR_MIGRATE_CHANGE_PROTECTION = (1 << 8), /* protect for changing domain configuration through the
* whole migration process; this will be used automatically
* when supported */
} virDomainMigrateFlags;

71
src/libvirt.c
View File

@ -4139,7 +4139,9 @@ virDomainMigrateVersion3(virDomainPtr domain,
int ret;
virDomainInfo info;
virErrorPtr orig_err = NULL;
int cancelled;
int cancelled = 1;
unsigned long protection = 0;
VIR_DOMAIN_DEBUG(domain, "dconn=%p xmlin=%s, flags=%lx, "
"dname=%s, uri=%s, bandwidth=%lu",
dconn, NULLSTR(xmlin), flags,
@ -4155,10 +4157,14 @@ virDomainMigrateVersion3(virDomainPtr domain,
return NULL;
}
if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION))
protection = VIR_MIGRATE_CHANGE_PROTECTION;
VIR_DEBUG("Begin3 %p", domain->conn);
dom_xml = domain->conn->driver->domainMigrateBegin3
(domain, xmlin, &cookieout, &cookieoutlen,
flags, dname, bandwidth);
flags | protection, dname, bandwidth);
if (!dom_xml)
goto done;
@ -4176,14 +4182,22 @@ virDomainMigrateVersion3(virDomainPtr domain,
(dconn, cookiein, cookieinlen, &cookieout, &cookieoutlen,
uri, &uri_out, flags, dname, bandwidth, dom_xml);
VIR_FREE (dom_xml);
if (ret == -1)
goto done;
if (ret == -1) {
if (protection) {
/* Begin already started a migration job so we need to cancel it by
* calling Confirm while making sure it doesn't overwrite the error
*/
orig_err = virSaveLastError();
goto confirm;
} else {
goto done;
}
}
if (uri == NULL && uri_out == NULL) {
virLibConnError(VIR_ERR_INTERNAL_ERROR,
_("domainMigratePrepare3 did not set uri"));
virDispatchError(domain->conn);
cancelled = 1;
goto finish;
}
if (uri_out)
@ -4204,7 +4218,7 @@ virDomainMigrateVersion3(virDomainPtr domain,
ret = domain->conn->driver->domainMigratePerform3
(domain, NULL, cookiein, cookieinlen,
&cookieout, &cookieoutlen, NULL,
uri, flags, dname, bandwidth);
uri, flags | protection, dname, bandwidth);
/* Perform failed. Make sure Finish doesn't overwrite the error */
if (ret < 0)
@ -4249,6 +4263,7 @@ finish:
if (!orig_err)
orig_err = virSaveLastError();
confirm:
/*
* If cancelled, then src VM will be restarted, else
* it will be killed
@ -4261,7 +4276,7 @@ finish:
cookieoutlen = 0;
ret = domain->conn->driver->domainMigrateConfirm3
(domain, cookiein, cookieinlen,
flags, cancelled);
flags | protection, cancelled);
/* If Confirm3 returns -1, there's nothing more we can
* do, but fortunately worst case is that there is a
* domain left in 'paused' state on source.
@ -4280,7 +4295,7 @@ finish:
/*
* In normal migration, the libvirt client co-ordinates communcation
* In normal migration, the libvirt client co-ordinates communication
* between the 2 libvirtd instances on source & dest hosts.
*
* In this peer-2-peer migration alternative, the libvirt client
@ -4365,7 +4380,7 @@ virDomainMigratePeer2Peer (virDomainPtr domain,
/*
* In normal migration, the libvirt client co-ordinates communcation
* In normal migration, the libvirt client co-ordinates communication
* between the 2 libvirtd instances on source & dest hosts.
*
* Some hypervisors support an alternative, direct migration where
@ -4452,6 +4467,9 @@ virDomainMigrateDirect (virDomainPtr domain,
* VIR_MIGRATE_UNDEFINE_SOURCE If the migration is successful, undefine the
* domain on the source host.
* VIR_MIGRATE_PAUSED Leave the domain suspended on the remote side.
* VIR_MIGRATE_CHANGE_PROTECTION Protect against domain configuration
* changes during the migration process (set
* automatically when supported).
*
* VIR_MIGRATE_TUNNELLED requires that VIR_MIGRATE_PEER2PEER be set.
* Applications using the VIR_MIGRATE_PEER2PEER flag will probably
@ -4559,6 +4577,19 @@ virDomainMigrate (virDomainPtr domain,
goto error;
}
} else {
/* Change protection requires support only on source side, and
* is only needed in v3 migration, which automatically re-adds
* the flag for just the source side. We mask it out for
* non-peer2peer to allow migration from newer source to an
* older destination that rejects the flag. */
if (flags & VIR_MIGRATE_CHANGE_PROTECTION &&
!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION)) {
virLibConnError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("cannot enforce change protection"));
goto error;
}
flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;
if (flags & VIR_MIGRATE_TUNNELLED) {
virLibConnError(VIR_ERR_OPERATION_INVALID,
_("cannot perform tunnelled migration without using peer2peer flag"));
@ -4627,6 +4658,9 @@ error:
* VIR_MIGRATE_UNDEFINE_SOURCE If the migration is successful, undefine the
* domain on the source host.
* VIR_MIGRATE_PAUSED Leave the domain suspended on the remote side.
* VIR_MIGRATE_CHANGE_PROTECTION Protect against domain configuration
* changes during the migration process (set
* automatically when supported).
*
* VIR_MIGRATE_TUNNELLED requires that VIR_MIGRATE_PEER2PEER be set.
* Applications using the VIR_MIGRATE_PEER2PEER flag will probably
@ -4741,6 +4775,19 @@ virDomainMigrate2(virDomainPtr domain,
goto error;
}
} else {
/* Change protection requires support only on source side, and
* is only needed in v3 migration, which automatically re-adds
* the flag for just the source side. We mask it out for
* non-peer2peer to allow migration from newer source to an
* older destination that rejects the flag. */
if (flags & VIR_MIGRATE_CHANGE_PROTECTION &&
!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION)) {
virLibConnError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("cannot enforce change protection"));
goto error;
}
flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;
if (flags & VIR_MIGRATE_TUNNELLED) {
virLibConnError(VIR_ERR_OPERATION_INVALID,
_("cannot perform tunnelled migration without using peer2peer flag"));
@ -4816,6 +4863,9 @@ error:
* on the destination host.
* VIR_MIGRATE_UNDEFINE_SOURCE If the migration is successful, undefine the
* domain on the source host.
* VIR_MIGRATE_CHANGE_PROTECTION Protect against domain configuration
* changes during the migration process (set
* automatically when supported).
*
* The operation of this API hinges on the VIR_MIGRATE_PEER2PEER flag.
* If the VIR_MIGRATE_PEER2PEER flag is NOT set, the duri parameter
@ -4937,6 +4987,9 @@ error:
* on the destination host.
* VIR_MIGRATE_UNDEFINE_SOURCE If the migration is successful, undefine the
* domain on the source host.
* VIR_MIGRATE_CHANGE_PROTECTION Protect against domain configuration
* changes during the migration process (set
* automatically when supported).
*
* The operation of this API hinges on the VIR_MIGRATE_PEER2PEER flag.
*

6
src/libvirt_internal.h
View File

@ -73,6 +73,12 @@ enum {
* domainMigrateConfirm3.
*/
VIR_DRV_FEATURE_MIGRATION_V3 = 6,
/*
* Driver supports protecting the whole V3-style migration against changes
* to domain configuration, i.e., starting from Begin3 and not Perform3.
*/
VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION = 7,
};

61
src/qemu/qemu_driver.c
View File

@ -893,6 +893,7 @@ qemudSupportsFeature (virConnectPtr conn ATTRIBUTE_UNUSED, int 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:
return 1;
default:
return 0;
@ -7447,12 +7448,56 @@ qemuDomainMigrateBegin3(virDomainPtr domain,
goto cleanup;
}
xml = qemuMigrationBegin(driver, vm, xmlin,
cookieout, cookieoutlen);
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;
}
if (!(xml = qemuMigrationBegin(driver, vm, xmlin,
cookieout, cookieoutlen)))
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 (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
@ -7634,6 +7679,7 @@ qemuDomainMigrateConfirm3(virDomainPtr domain,
struct qemud_driver *driver = domain->conn->privateData;
virDomainObjPtr vm;
int ret = -1;
enum qemuMigrationJobPhase phase;
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
@ -7647,14 +7693,21 @@ qemuDomainMigrateConfirm3(virDomainPtr domain,
goto cleanup;
}
if (qemuDomainObjBeginJobWithDriver(driver, vm, QEMU_JOB_MODIFY) < 0)
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);
ret = qemuMigrationConfirm(driver, domain->conn, vm,
cookiein, cookieinlen,
flags, cancelled);
if (qemuDomainObjEndJob(driver, vm) == 0) {
if (qemuMigrationJobFinish(driver, vm) == 0) {
vm = NULL;
} else if (!virDomainObjIsActive(vm) &&
(!vm->persistent || (flags & VIR_MIGRATE_UNDEFINE_SOURCE))) {

288
src/qemu/qemu_migration.c
View File

@ -1009,6 +1009,7 @@ qemuDomainMigrateGraphicsRelocate(struct qemud_driver *driver,
}
/* The caller is supposed to lock the vm and start a migration job. */
char *qemuMigrationBegin(struct qemud_driver *driver,
virDomainObjPtr vm,
const char *xmlin,
@ -1018,14 +1019,17 @@ char *qemuMigrationBegin(struct qemud_driver *driver,
char *rv = NULL;
qemuMigrationCookiePtr mig = NULL;
virDomainDefPtr def = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
VIR_DEBUG("driver=%p, vm=%p, xmlin=%s, cookieout=%p, cookieoutlen=%p",
driver, vm, NULLSTR(xmlin), cookieout, cookieoutlen);
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
/* Only set the phase if we are inside QEMU_ASYNC_JOB_MIGRATION_OUT.
* Otherwise we will start the async job later in the perform phase losing
* change protection.
*/
if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_OUT)
qemuMigrationJobSetPhase(driver, vm, QEMU_MIGRATION_PHASE_BEGIN3);
if (qemuProcessAutoDestroyActive(driver, vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
@ -1063,7 +1067,6 @@ char *qemuMigrationBegin(struct qemud_driver *driver,
}
cleanup:
virDomainObjUnlock(vm);
qemuMigrationCookieFree(mig);
virDomainDefFree(def);
return rv;
@ -1904,6 +1907,7 @@ static int doPeer2PeerMigrate2(struct qemud_driver *driver,
* until the migration is complete.
*/
VIR_DEBUG("Perform %p", sconn);
qemuMigrationJobSetPhase(driver, vm, QEMU_MIGRATION_PHASE_PERFORM2);
if (flags & VIR_MIGRATE_TUNNELLED)
ret = doTunnelMigrate(driver, vm, st,
NULL, 0, NULL, NULL,
@ -1990,6 +1994,11 @@ static int doPeer2PeerMigrate3(struct qemud_driver *driver,
NULLSTR(dconnuri), NULLSTR(uri), flags,
NULLSTR(dname), resource);
/* Unlike the virDomainMigrateVersion3 counterpart, we don't need
* to worry about auto-setting the VIR_MIGRATE_CHANGE_PROTECTION
* bit here, because we are already running inside the context of
* a single job. */
dom_xml = qemuMigrationBegin(driver, vm, xmlin,
&cookieout, &cookieoutlen);
if (!dom_xml)
@ -2038,6 +2047,7 @@ static int doPeer2PeerMigrate3(struct qemud_driver *driver,
* confirm migration completion.
*/
VIR_DEBUG("Perform3 %p uri=%s uri_out=%s", sconn, uri, uri_out);
qemuMigrationJobSetPhase(driver, vm, QEMU_MIGRATION_PHASE_PERFORM3);
VIR_FREE(cookiein);
cookiein = cookieout;
cookieinlen = cookieoutlen;
@ -2055,8 +2065,12 @@ static int doPeer2PeerMigrate3(struct qemud_driver *driver,
flags, dname, resource);
/* Perform failed. Make sure Finish doesn't overwrite the error */
if (ret < 0)
if (ret < 0) {
orig_err = virSaveLastError();
} else {
qemuMigrationJobSetPhase(driver, vm,
QEMU_MIGRATION_PHASE_PERFORM3_DONE);
}
/* If Perform returns < 0, then we need to cancel the VM
* startup on the destination
@ -2178,7 +2192,7 @@ static int doPeer2PeerMigrate(struct qemud_driver *driver,
p2p = VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
VIR_DRV_FEATURE_MIGRATION_P2P);
/* v3proto reflects whether the caller used Perform3, but with
* p2p migrate, regardless of whether Perform3 or Perform3
* p2p migrate, regardless of whether Perform2 or Perform3
* were used, we decide protocol based on what target supports
*/
*v3proto = VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
@ -2198,6 +2212,13 @@ static int doPeer2PeerMigrate(struct qemud_driver *driver,
goto cleanup;
}
/* Change protection is only required on the source side (us), and
* only for v3 migration when begin and perform are separate jobs.
* But peer-2-peer is already a single job, and we still want to
* talk to older destinations that would reject the flag.
* Therefore it is safe to clear the bit here. */
flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;
if (*v3proto)
ret = doPeer2PeerMigrate3(driver, sconn, dconn, vm, xmlin,
dconnuri, uri, flags, dname, resource);
@ -2219,35 +2240,32 @@ cleanup:
}
int qemuMigrationPerform(struct qemud_driver *driver,
virConnectPtr conn,
virDomainObjPtr vm,
const char *xmlin,
const char *dconnuri,
const char *uri,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned long flags,
const char *dname,
unsigned long resource,
bool v3proto)
/*
* This implements perform part of the migration protocol when migration job
* does not need to be active across several APIs, i.e., peer2peer migration or
* perform phase of v2 non-peer2peer migration.
*/
static int
qemuMigrationPerformJob(struct qemud_driver *driver,
virConnectPtr conn,
virDomainObjPtr vm,
const char *xmlin,
const char *dconnuri,
const char *uri,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned long flags,
const char *dname,
unsigned long resource,
bool v3proto)
{
virDomainEventPtr event = NULL;
int ret = -1;
int resume = 0;
qemuDomainObjPrivatePtr priv = vm->privateData;
VIR_DEBUG("driver=%p, conn=%p, vm=%p, xmlin=%s, dconnuri=%s, "
"uri=%s, cookiein=%s, cookieinlen=%d, cookieout=%p, "
"cookieoutlen=%p, flags=%lx, dname=%s, resource=%lu, v3proto=%d",
driver, conn, vm, NULLSTR(xmlin), NULLSTR(dconnuri),
NULLSTR(uri), NULLSTR(cookiein), cookieinlen,
cookieout, cookieoutlen, flags, NULLSTR(dname),
resource, v3proto);
if (qemuDomainObjBeginAsyncJobWithDriver(driver, vm,
QEMU_ASYNC_JOB_MIGRATION_OUT) < 0)
if (qemuMigrationJobStart(driver, vm, QEMU_ASYNC_JOB_MIGRATION_OUT) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
@ -2262,52 +2280,33 @@ int qemuMigrationPerform(struct qemud_driver *driver,
goto endjob;
}
memset(&priv->job.info, 0, sizeof(priv->job.info));
priv->job.info.type = VIR_DOMAIN_JOB_UNBOUNDED;
resume = virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING;
if ((flags & (VIR_MIGRATE_TUNNELLED | VIR_MIGRATE_PEER2PEER))) {
if (cookieinlen) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("received unexpected cookie with P2P migration"));
goto endjob;
}
if (doPeer2PeerMigrate(driver, conn, vm, xmlin,
dconnuri, uri, flags, dname,
resource, &v3proto) < 0)
/* doPeer2PeerMigrate already set the error, so just get out */
goto endjob;
ret = doPeer2PeerMigrate(driver, conn, vm, xmlin,
dconnuri, uri, flags, dname,
resource, &v3proto);
} else {
if (dconnuri) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Unexpected dconnuri parameter with non-peer2peer migration"));
goto endjob;
}
if (doNativeMigrate(driver, vm, uri, cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, dname, resource) < 0)
goto endjob;
qemuMigrationJobSetPhase(driver, vm, QEMU_MIGRATION_PHASE_PERFORM2);
ret = doNativeMigrate(driver, vm, uri, cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, dname, resource);
}
if (ret < 0)
goto endjob;
/*
* In v3 protocol, the source VM is not killed off until the
* confirm step.
*/
if (v3proto) {
resume = 0;
} else {
if (!v3proto) {
qemuProcessStop(driver, vm, 1, VIR_DOMAIN_SHUTOFF_MIGRATED);
virDomainAuditStop(vm, "migrated");
resume = 0;
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_MIGRATED);
}
ret = 0;
resume = 0;
endjob:
if (resume && virDomainObjGetState(vm, NULL) == VIR_DOMAIN_PAUSED) {
@ -2326,16 +2325,16 @@ endjob:
VIR_DOMAIN_EVENT_RESUMED,
VIR_DOMAIN_EVENT_RESUMED_MIGRATED);
}
if (vm) {
if (qemuDomainObjEndAsyncJob(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);
virDomainRemoveInactive(&driver->domains, vm);
vm = NULL;
}
if (qemuMigrationJobFinish(driver, vm) == 0) {
vm = NULL;
} else if (!virDomainObjIsActive(vm) &&
(!vm->persistent ||
(ret == 0 && (flags & VIR_MIGRATE_UNDEFINE_SOURCE)))) {
if (flags & VIR_MIGRATE_UNDEFINE_SOURCE)
virDomainDeleteConfig(driver->configDir, driver->autostartDir, vm);
virDomainRemoveInactive(&driver->domains, vm);
vm = NULL;
}
cleanup:
@ -2346,6 +2345,140 @@ cleanup:
return ret;
}
/*
* This implements perform phase of v3 migration protocol.
*/
static int
qemuMigrationPerformPhase(struct qemud_driver *driver,
virConnectPtr conn,
virDomainObjPtr vm,
const char *uri,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned long flags,
const char *dname,
unsigned long resource)
{
virDomainEventPtr event = NULL;
int ret = -1;
bool resume;
int refs;
/* If we didn't start the job in the begin phase, start it now. */
if (!(flags & VIR_MIGRATE_CHANGE_PROTECTION)) {
if (qemuMigrationJobStart(driver, vm, QEMU_ASYNC_JOB_MIGRATION_OUT) < 0)
goto cleanup;
} else if (!qemuMigrationJobIsActive(vm, QEMU_ASYNC_JOB_MIGRATION_OUT)) {
goto cleanup;
}
qemuMigrationJobStartPhase(driver, vm, QEMU_MIGRATION_PHASE_PERFORM3);
resume = virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING;
ret = doNativeMigrate(driver, vm, uri, cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, dname, resource);
if (ret < 0 && resume &&
virDomainObjGetState(vm, NULL) == VIR_DOMAIN_PAUSED) {
/* we got here through some sort of failure; start the domain again */
if (qemuProcessStartCPUs(driver, vm, conn,
VIR_DOMAIN_RUNNING_MIGRATION_CANCELED) < 0) {
/* Hm, we already know we are in error here. We don't want to
* overwrite the previous error, though, so we just throw something
* to the logs and hope for the best
*/
VIR_ERROR(_("Failed to resume guest %s after failure"),
vm->def->name);
}
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_RESUMED,
VIR_DOMAIN_EVENT_RESUMED_MIGRATED);
}
if (ret < 0)
goto endjob;
qemuMigrationJobSetPhase(driver, vm, QEMU_MIGRATION_PHASE_PERFORM3_DONE);
endjob:
if (ret < 0)
refs = qemuMigrationJobFinish(driver, vm);
else
refs = qemuMigrationJobContinue(vm);
if (refs == 0) {
vm = NULL;
} else if (!virDomainObjIsActive(vm) && !vm->persistent) {
virDomainRemoveInactive(&driver->domains, vm);
vm = NULL;
}
cleanup:
if (vm)
virDomainObjUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
return ret;
}
int
qemuMigrationPerform(struct qemud_driver *driver,
virConnectPtr conn,
virDomainObjPtr vm,
const char *xmlin,
const char *dconnuri,
const char *uri,
const char *cookiein,
int cookieinlen,
char **cookieout,
int *cookieoutlen,
unsigned long flags,
const char *dname,
unsigned long resource,
bool v3proto)
{
VIR_DEBUG("driver=%p, conn=%p, vm=%p, xmlin=%s, dconnuri=%s, "
"uri=%s, cookiein=%s, cookieinlen=%d, cookieout=%p, "
"cookieoutlen=%p, flags=%lx, dname=%s, resource=%lu, v3proto=%d",
driver, conn, vm, NULLSTR(xmlin), NULLSTR(dconnuri),
NULLSTR(uri), NULLSTR(cookiein), cookieinlen,
cookieout, cookieoutlen, flags, NULLSTR(dname),
resource, v3proto);
if ((flags & (VIR_MIGRATE_TUNNELLED | VIR_MIGRATE_PEER2PEER))) {
if (cookieinlen) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("received unexpected cookie with P2P migration"));
return -1;
}
return qemuMigrationPerformJob(driver, conn, vm, xmlin, dconnuri, uri,
cookiein, cookieinlen, cookieout,
cookieoutlen, flags, dname, resource,
v3proto);
} else {
if (dconnuri) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Unexpected dconnuri parameter with non-peer2peer migration"));
return -1;
}
if (v3proto) {
return qemuMigrationPerformPhase(driver, conn, vm, uri,
cookiein, cookieinlen,
cookieout, cookieoutlen,
flags, dname, resource);
} else {
return qemuMigrationPerformJob(driver, conn, vm, xmlin, dconnuri,
uri, cookiein, cookieinlen,
cookieout, cookieoutlen, flags,
dname, resource, v3proto);
}
}
}
#if WITH_MACVTAP
static void
@ -2579,15 +2712,14 @@ int qemuMigrationConfirm(struct qemud_driver *driver,
virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
qemuMigrationJobSetPhase(driver, vm,
retcode == 0
? QEMU_MIGRATION_PHASE_CONFIRM3
: QEMU_MIGRATION_PHASE_CONFIRM3_CANCELLED);
if (!(mig = qemuMigrationEatCookie(driver, vm, cookiein, cookieinlen, 0)))
return -1;
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("guest unexpectedly quit"));
goto cleanup;
}
/* Did the migration go as planned? If yes, kill off the
* domain object, but if no, resume CPUs
*/

3
src/qemu/qemu_migration.h
View File

@ -34,7 +34,8 @@
VIR_MIGRATE_UNDEFINE_SOURCE | \
VIR_MIGRATE_PAUSED | \
VIR_MIGRATE_NON_SHARED_DISK | \
VIR_MIGRATE_NON_SHARED_INC)
VIR_MIGRATE_NON_SHARED_INC | \
VIR_MIGRATE_CHANGE_PROTECTION)
enum qemuMigrationJobPhase {
QEMU_MIGRATION_PHASE_NONE = 0,