[Qemu-devel] [PATCH 2/3] block/mirror: allow migration after sync

[John Snow <jsnow@redhat.com>]

After the mirroring blockjob reaches synchronization,
allow migration to resume.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 block/mirror.c           | 2 ++
 blockjob.c               | 5 +++++
 include/block/blockjob.h | 8 ++++++++
 3 files changed, 15 insertions(+)

diff --git a/block/mirror.c b/block/mirror.c
index a258926..5eb469a 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -415,6 +415,7 @@ static void coroutine_fn mirror_run(void *opaque)
         /* Report BLOCK_JOB_READY and wait for complete. */
         block_job_event_ready(&s->common);
         s->synced = true;
+        block_job_allow_migration(&s->common);
         while (!block_job_is_cancelled(&s->common) && !s->should_complete) {
             block_job_yield(&s->common);
         }
@@ -540,6 +541,7 @@ static void coroutine_fn mirror_run(void *opaque)
                 if (!s->synced) {
                     block_job_event_ready(&s->common);
                     s->synced = true;
+                    block_job_allow_migration(&s->common);
                 }
 
                 should_complete = s->should_complete ||
diff --git a/blockjob.c b/blockjob.c
index b5849b3..bcb4fca 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -95,6 +95,11 @@ void block_job_release(BlockDriverState *bs)
     g_free(job);
 }
 
+void block_job_allow_migration(BlockJob *job)
+{
+    migrate_del_blocker(job->blocker);
+}
+
 void block_job_completed(BlockJob *job, int ret)
 {
     BlockDriverState *bs = job->bs;
diff --git a/include/block/blockjob.h b/include/block/blockjob.h
index dd9d5e6..2278484 100644
--- a/include/block/blockjob.h
+++ b/include/block/blockjob.h
@@ -147,6 +147,14 @@ void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
                        void *opaque, Error **errp);
 
 /**
+ * block_job_allow_migration:
+ * @job: The job to modify to lift its restriction on migrations.
+ *
+ * Lift this job's restriction on prohibiting outgoing migrations.
+ */
+void block_job_allow_migration(BlockJob *job);
+
+/**
  * block_job_sleep_ns:
  * @job: The job that calls the function.
  * @clock: The clock to sleep on.
-- 
2.4.3