[Qemu-devel] [PULL 44/53] blockdev: acquire AioContext in do_qmp_query_block_jobs_one()

[Stefan Hajnoczi]

Make sure that query-block-jobs acquires the BlockDriverState
AioContext so that the blockjob isn't running in another thread while we
access its state.

Signed-off-by: Stefan Hajnoczi <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
Message-id: address@hidden
---
 blockdev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/blockdev.c b/blockdev.c
index 501473d..40fc5d6 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2628,12 +2628,18 @@ BlockJobInfoList *qmp_query_block_jobs(Error **errp)
     BlockDriverState *bs;
 
     for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
+        AioContext *aio_context = bdrv_get_aio_context(bs);
+
+        aio_context_acquire(aio_context);
+
         if (bs->job) {
             BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
             elem->value = block_job_query(bs->job);
             *p_next = elem;
             p_next = &elem->next;
         }
+
+        aio_context_release(aio_context);
     }
 
     return head;
-- 
1.9.3