[libvirt PATCH 22/80] qemu: Handle 'postcopy-paused' migration state
Jiri Denemark
jdenemar at redhat.com
Tue May 10 15:20:43 UTC 2022
When connection breaks during post-copy migration, QEMU enters
'postcopy-paused' state. We need to handle this state and make the
situation visible to upper layers.
Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
---
src/hypervisor/domain_job.c | 1 +
src/hypervisor/domain_job.h | 1 +
src/qemu/qemu_driver.c | 1 +
src/qemu/qemu_migration.c | 11 +++++++++++
src/qemu/qemu_monitor.c | 1 +
src/qemu/qemu_monitor.h | 1 +
src/qemu/qemu_monitor_json.c | 1 +
src/qemu/qemu_process.c | 33 ++++++++++++++++++++-------------
8 files changed, 37 insertions(+), 13 deletions(-)
diff --git a/src/hypervisor/domain_job.c b/src/hypervisor/domain_job.c
index ff4e008cb5..49867c3982 100644
--- a/src/hypervisor/domain_job.c
+++ b/src/hypervisor/domain_job.c
@@ -93,6 +93,7 @@ virDomainJobStatusToType(virDomainJobStatus status)
case VIR_DOMAIN_JOB_STATUS_MIGRATING:
case VIR_DOMAIN_JOB_STATUS_HYPERVISOR_COMPLETED:
case VIR_DOMAIN_JOB_STATUS_POSTCOPY:
+ case VIR_DOMAIN_JOB_STATUS_POSTCOPY_PAUSED:
case VIR_DOMAIN_JOB_STATUS_PAUSED:
return VIR_DOMAIN_JOB_UNBOUNDED;
diff --git a/src/hypervisor/domain_job.h b/src/hypervisor/domain_job.h
index db8b8b1390..fce35ffbf5 100644
--- a/src/hypervisor/domain_job.h
+++ b/src/hypervisor/domain_job.h
@@ -78,6 +78,7 @@ typedef enum {
VIR_DOMAIN_JOB_STATUS_HYPERVISOR_COMPLETED,
VIR_DOMAIN_JOB_STATUS_PAUSED,
VIR_DOMAIN_JOB_STATUS_POSTCOPY,
+ VIR_DOMAIN_JOB_STATUS_POSTCOPY_PAUSED,
VIR_DOMAIN_JOB_STATUS_COMPLETED,
VIR_DOMAIN_JOB_STATUS_FAILED,
VIR_DOMAIN_JOB_STATUS_CANCELED,
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 9e6cf26001..d19115473a 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -12514,6 +12514,7 @@ qemuDomainGetJobInfoMigrationStats(virQEMUDriver *driver,
case VIR_DOMAIN_JOB_STATUS_HYPERVISOR_COMPLETED:
case VIR_DOMAIN_JOB_STATUS_POSTCOPY:
case VIR_DOMAIN_JOB_STATUS_PAUSED:
+ case VIR_DOMAIN_JOB_STATUS_POSTCOPY_PAUSED:
if (events &&
jobData->status != VIR_DOMAIN_JOB_STATUS_ACTIVE &&
qemuMigrationAnyFetchStats(driver, vm, VIR_ASYNC_JOB_NONE,
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 72a2846d1f..e5e33556e3 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -1757,6 +1757,10 @@ qemuMigrationUpdateJobType(virDomainJobData *jobData)
jobData->status = VIR_DOMAIN_JOB_STATUS_POSTCOPY;
break;
+ case QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY_PAUSED:
+ jobData->status = VIR_DOMAIN_JOB_STATUS_POSTCOPY_PAUSED;
+ break;
+
case QEMU_MONITOR_MIGRATION_STATUS_COMPLETED:
jobData->status = VIR_DOMAIN_JOB_STATUS_HYPERVISOR_COMPLETED;
break;
@@ -1883,6 +1887,12 @@ qemuMigrationJobCheckStatus(virQEMUDriver *driver,
qemuMigrationJobName(vm), _("canceled by client"));
return -1;
+ case VIR_DOMAIN_JOB_STATUS_POSTCOPY_PAUSED:
+ virReportError(VIR_ERR_OPERATION_FAILED, _("%s: %s"),
+ qemuMigrationJobName(vm),
+ _("post-copy phase failed"));
+ return -1;
+
case VIR_DOMAIN_JOB_STATUS_COMPLETED:
case VIR_DOMAIN_JOB_STATUS_ACTIVE:
case VIR_DOMAIN_JOB_STATUS_MIGRATING:
@@ -1985,6 +1995,7 @@ qemuMigrationAnyCompleted(virQEMUDriver *driver,
case VIR_DOMAIN_JOB_STATUS_FAILED:
case VIR_DOMAIN_JOB_STATUS_CANCELED:
+ case VIR_DOMAIN_JOB_STATUS_POSTCOPY_PAUSED:
/* QEMU aborted the migration. */
return -1;
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 98cf1c949e..36cf4e57b5 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -149,6 +149,7 @@ VIR_ENUM_IMPL(qemuMonitorMigrationStatus,
"inactive", "setup",
"active", "pre-switchover",
"device", "postcopy-active",
+ "postcopy-paused",
"completed", "failed",
"cancelling", "cancelled",
"wait-unplug",
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index abc29eaf4c..46cdc04925 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -831,6 +831,7 @@ typedef enum {
QEMU_MONITOR_MIGRATION_STATUS_PRE_SWITCHOVER,
QEMU_MONITOR_MIGRATION_STATUS_DEVICE,
QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY,
+ QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY_PAUSED,
QEMU_MONITOR_MIGRATION_STATUS_COMPLETED,
QEMU_MONITOR_MIGRATION_STATUS_ERROR,
QEMU_MONITOR_MIGRATION_STATUS_CANCELLING,
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 532aad348e..ac3ec42fdd 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -3242,6 +3242,7 @@ qemuMonitorJSONGetMigrationStatsReply(virJSONValue *reply,
case QEMU_MONITOR_MIGRATION_STATUS_ACTIVE:
case QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY:
+ case QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY_PAUSED:
case QEMU_MONITOR_MIGRATION_STATUS_COMPLETED:
case QEMU_MONITOR_MIGRATION_STATUS_CANCELLING:
case QEMU_MONITOR_MIGRATION_STATUS_PRE_SWITCHOVER:
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 53221ea9ff..fc61aa71a0 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -1568,19 +1568,26 @@ qemuProcessHandleMigrationStatus(qemuMonitor *mon G_GNUC_UNUSED,
privJob->stats.mig.status = status;
virDomainObjBroadcast(vm);
- if (status == QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY &&
- priv->job.asyncJob == VIR_ASYNC_JOB_MIGRATION_OUT &&
- virDomainObjGetState(vm, &reason) == VIR_DOMAIN_PAUSED &&
- reason == VIR_DOMAIN_PAUSED_MIGRATION) {
- VIR_DEBUG("Correcting paused state reason for domain %s to %s",
- vm->def->name,
- virDomainPausedReasonTypeToString(VIR_DOMAIN_PAUSED_POSTCOPY));
-
- virDomainObjSetState(vm, VIR_DOMAIN_PAUSED, VIR_DOMAIN_PAUSED_POSTCOPY);
- event = virDomainEventLifecycleNewFromObj(vm,
- VIR_DOMAIN_EVENT_SUSPENDED,
- VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY);
- qemuDomainSaveStatus(vm);
+ if (priv->job.asyncJob == VIR_ASYNC_JOB_MIGRATION_OUT &&
+ virDomainObjGetState(vm, &reason) == VIR_DOMAIN_PAUSED) {
+ if (status == QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY_PAUSED) {
+ /* At this point no thread is watching the migration progress on
+ * the source as it is just waiting for the Finish phase to end.
+ * Thus we need to handle the event here. */
+ qemuMigrationSrcPostcopyFailed(vm);
+ qemuDomainSaveStatus(vm);
+ } else if (status == QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY &&
+ reason == VIR_DOMAIN_PAUSED_MIGRATION) {
+ VIR_DEBUG("Correcting paused state reason for domain %s to %s",
+ vm->def->name,
+ virDomainPausedReasonTypeToString(VIR_DOMAIN_PAUSED_POSTCOPY));
+
+ virDomainObjSetState(vm, VIR_DOMAIN_PAUSED, VIR_DOMAIN_PAUSED_POSTCOPY);
+ event = virDomainEventLifecycleNewFromObj(vm,
+ VIR_DOMAIN_EVENT_SUSPENDED,
+ VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY);
+ qemuDomainSaveStatus(vm);
+ }
}
cleanup:
--
2.35.1
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