[libvirt] [PATCH] qemu: Update balloon state after migration finishes

[Peter Krempa]

Since qemu doesn't know at the beginning of migration what the actual
balloon size is until the migration stream transfers the appropriate
fields we also need to update the balloon size unconditionally in the
finish phase of the migration.
---
 src/qemu/qemu_migration.c | 4 ++++
 src/qemu/qemu_process.c   | 2 +-
 src/qemu/qemu_process.h   | 4 ++++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 903612b..38649ed 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -5701,6 +5701,10 @@ qemuMigrationFinish(virQEMUDriverPtr driver,
         if (qemuMigrationStopNBDServer(driver, vm, mig) < 0)
             goto endjob;

+        if (qemuProcessRefreshBalloonState(driver, vm,
+                                           QEMU_ASYNC_JOB_MIGRATION_IN) < 0)
+            goto endjob;
+
         if (flags & VIR_MIGRATE_PERSIST_DEST) {
             if (qemuMigrationPersist(driver, vm, mig, !v3proto) < 0) {
                 /* Hmpf.  Migration was successful, but making it persistent
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 7187dc1..f14582b 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -2091,7 +2091,7 @@ qemuProcessReconnectRefreshChannelVirtioState(virQEMUDriverPtr driver,
 }


-static int
+int
 qemuProcessRefreshBalloonState(virQEMUDriverPtr driver,
                                virDomainObjPtr vm,
                                int asyncJob)
diff --git a/src/qemu/qemu_process.h b/src/qemu/qemu_process.h
index d40f68d..b198c2b 100644
--- a/src/qemu/qemu_process.h
+++ b/src/qemu/qemu_process.h
@@ -115,4 +115,8 @@ virDomainDiskDefPtr qemuProcessFindDomainDiskByAlias(virDomainObjPtr vm,

 int qemuConnectAgent(virQEMUDriverPtr driver, virDomainObjPtr vm);

+int qemuProcessRefreshBalloonState(virQEMUDriverPtr driver,
+                                   virDomainObjPtr vm,
+                                   int asyncJob);
+
 #endif /* __QEMU_PROCESS_H__ */
-- 
2.4.5