Re: [libvirt PATCH 54/80] qemu: Implement VIR_MIGRATE_POSTCOPY_RESUME for Begin phase

Mostly we just need to check whether the domain is in a failed post-copy migration that can be resumed. Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com&gt; --- src/qemu/qemu_migration.c | 143 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index c111dd8686..99b1d4b88b 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -2717,6 +2717,143 @@ qemuMigrationSrcBeginPhase(virQEMUDriver *driver, flags); } + +static bool +qemuMigrationAnyCanResume(virDomainObj *vm, + virDomainAsyncJob job, + unsigned long flags, + qemuMigrationJobPhase expectedPhase) +{ + qemuDomainObjPrivate *priv = vm->privateData; + + VIR_DEBUG("vm=%p, job=%s, flags=0x%lx, expectedPhase=%s", + vm, virDomainAsyncJobTypeToString(job), flags, + qemuDomainAsyncJobPhaseToString(VIR_ASYNC_JOB_MIGRATION_OUT, + expectedPhase)); + + if (!(flags & VIR_MIGRATE_POSTCOPY)) { + virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s", + _("resuming failed post-copy migration requires " + "post-copy to be enabled")); + return false; + } + + /* This should never happen since POSTCOPY_RESUME is newer than + * CHANGE_PROTECTION, but let's check it anyway in case we're talking to + * a weired client. + */ + if (job == VIR_ASYNC_JOB_MIGRATION_OUT && + expectedPhase < QEMU_MIGRATION_PHASE_PERFORM_RESUME && + !(flags & VIR_MIGRATE_CHANGE_PROTECTION)) { + virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s", + _("resuming failed post-copy migration requires " + "change protection")); + return NULL;

+ } + + if (!qemuMigrationJobIsActive(vm, job)) + return false; + + if (priv->job.asyncOwner != 0 && + priv->job.asyncOwner != virThreadSelfID()) { + virReportError(VIR_ERR_OPERATION_INVALID, + _("migration of domain %s is being actively monitored " + "by another thread"), + vm->def->name); + return false; + } + + if (!virDomainObjIsPostcopy(vm, priv->job.current->operation)) { + virReportError(VIR_ERR_OPERATION_INVALID, + _("migration of domain %s is not in post-copy phase"), + vm->def->name); + return false; + } + + if (priv->job.phase < QEMU_MIGRATION_PHASE_POSTCOPY_FAILED && + !virDomainObjIsFailedPostcopy(vm)) { + virReportError(VIR_ERR_OPERATION_INVALID, + _("post-copy migration of domain %s has not failed"), + vm->def->name); + return false; + } + + if (priv->job.phase > expectedPhase) { + virReportError(VIR_ERR_OPERATION_INVALID, + _("resuming failed post-copy migration of domain %s " + "already in progress"), + vm->def->name); + return false; + } + + return true; +}