job: Move defer_to_main_loop to Job

Move the defer_to_main_loop functionality from BlockJob to Job.

The code can be simplified because we can use job->aio_context in
job_defer_to_main_loop_bh() now, instead of having to access the
BlockDriverState.

Probably taking the data->aio_context lock in addition was already
unnecessary in the old code because we didn't actually make use of
anything protected by the old AioContext except getting the new
AioContext, in case it changed between scheduling the BH and running it.
But it's certainly unnecessary now that the BDS isn't accessed at all
any more.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/block/commit.c b/block/commit.c
index 85baea8f92..d326766e4d 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -72,9 +72,10 @@ typedef struct {
     int ret;
 } CommitCompleteData;
 
-static void commit_complete(BlockJob *job, void *opaque)
+static void commit_complete(Job *job, void *opaque)
 {
-    CommitBlockJob *s = container_of(job, CommitBlockJob, common);
+    CommitBlockJob *s = container_of(job, CommitBlockJob, common.job);
+    BlockJob *bjob = &s->common;
     CommitCompleteData *data = opaque;
     BlockDriverState *top = blk_bs(s->top);
     BlockDriverState *base = blk_bs(s->base);
@@ -90,7 +91,7 @@ static void commit_complete(BlockJob *job, void *opaque)
      * the normal backing chain can be restored. */
     blk_unref(s->base);
 
-    if (!job_is_cancelled(&s->common.job) && ret == 0) {
+    if (!job_is_cancelled(job) && ret == 0) {
         /* success */
         ret = bdrv_drop_intermediate(s->commit_top_bs, base,
                                      s->backing_file_str);
@@ -114,7 +115,7 @@ static void commit_complete(BlockJob *job, void *opaque)
      * block_job_finish_sync()), block_job_completed() won't free it and
      * therefore the blockers on the intermediate nodes remain. This would
      * cause bdrv_set_backing_hd() to fail. */
-    block_job_remove_all_bdrv(job);
+    block_job_remove_all_bdrv(bjob);
 
     block_job_completed(&s->common, ret);
     g_free(data);
@@ -211,7 +212,7 @@ out:
 
     data = g_malloc(sizeof(*data));
     data->ret = ret;
-    block_job_defer_to_main_loop(&s->common, commit_complete, data);
+    job_defer_to_main_loop(&s->common.job, commit_complete, data);
 }
 
 static const BlockJobDriver commit_job_driver = {