[libvirt PATCH v2 21/81] qemu: Add support for postcopy-recover QEMU migration state

[Jiri Denemark <jdenemar@xxxxxxxxxx>]

Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
---

Notes:
    Version 2:
    - rebased on top of newly added "qemu: Use switch in
      qemuProcessHandleMigrationStatus"
    - debug message on a single line

 src/qemu/qemu_migration.c    |  1 +
 src/qemu/qemu_monitor.c      |  2 +-
 src/qemu/qemu_monitor.h      |  1 +
 src/qemu/qemu_monitor_json.c |  1 +
 src/qemu/qemu_process.c      | 25 +++++++++++++++++++++++++
 5 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index de4be0e7f9..12f06648d7 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -1744,6 +1744,7 @@ qemuMigrationUpdateJobType(virDomainJobData *jobData)
 
     switch ((qemuMonitorMigrationStatus) priv->stats.mig.status) {
     case QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY:
+    case QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY_RECOVER:
         jobData->status = VIR_DOMAIN_JOB_STATUS_POSTCOPY;
         break;
 
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 8d0f54e4a0..ec56d413da 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -149,7 +149,7 @@ VIR_ENUM_IMPL(qemuMonitorMigrationStatus,
               "inactive", "setup",
               "active", "pre-switchover",
               "device", "postcopy-active",
-              "postcopy-paused",
+              "postcopy-paused", "postcopy-recover",
               "completed", "failed",
               "cancelling", "cancelled",
               "wait-unplug",
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 90532962fe..41e8db945c 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -796,6 +796,7 @@ typedef enum {
     QEMU_MONITOR_MIGRATION_STATUS_DEVICE,
     QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY,
     QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY_PAUSED,
+    QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY_RECOVER,
     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 ffff9e7103..83d0600a75 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -3243,6 +3243,7 @@ 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_POSTCOPY_RECOVER:
     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 6acf5c7881..b039108ff7 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -1524,6 +1524,31 @@ qemuProcessHandleMigrationStatus(qemuMonitor *mon G_GNUC_UNUSED,
         }
         break;
 
+    case QEMU_MONITOR_MIGRATION_STATUS_POSTCOPY_RECOVER:
+        if (virDomainObjIsFailedPostcopy(vm)) {
+            int eventType = -1;
+            int eventDetail = -1;
+
+            if (state == VIR_DOMAIN_PAUSED) {
+                reason = VIR_DOMAIN_PAUSED_POSTCOPY;
+                eventType = VIR_DOMAIN_EVENT_SUSPENDED;
+                eventDetail = qemuDomainPausedReasonToSuspendedEvent(reason);
+            } else {
+                reason = VIR_DOMAIN_RUNNING_POSTCOPY;
+                eventType = VIR_DOMAIN_EVENT_RESUMED;
+                eventDetail = qemuDomainRunningReasonToResumeEvent(reason);
+            }
+
+            VIR_DEBUG("Post-copy migration recovered; correcting state for domain '%s' to %s/%s",
+                      vm->def->name,
+                      virDomainStateTypeToString(state),
+                      NULLSTR(virDomainStateReasonToString(state, reason)));
+            virDomainObjSetState(vm, state, reason);
+            event = virDomainEventLifecycleNewFromObj(vm, eventType, eventDetail);
+            qemuDomainSaveStatus(vm);
+        }
+        break;
+
     case QEMU_MONITOR_MIGRATION_STATUS_INACTIVE:
     case QEMU_MONITOR_MIGRATION_STATUS_SETUP:
     case QEMU_MONITOR_MIGRATION_STATUS_ACTIVE:
-- 
2.35.1