diff mbox

[02/11] blockdev: acquire AioContext in do_qmp_query_block_jobs_one()

Message ID 1412182919-9550-3-git-send-email-stefanha@redhat.com
State New
Headers show

Commit Message

Stefan Hajnoczi Oct. 1, 2014, 5:01 p.m. UTC 
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 <stefanha@redhat.com>
---
 blockdev.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

Comments

Max Reitz Oct. 1, 2014, 6:32 p.m. UTC | #1 
On 01.10.2014 19:01, Stefan Hajnoczi wrote:
> 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 <stefanha@redhat.com>
> ---
>   blockdev.c | 9 +++++++--
>   1 file changed, 7 insertions(+), 2 deletions(-)

This conflicts with patch 7 Markus's BlockBackend series; but in itself, 
this patch is fine.

Reviewed-by: Max Reitz <mreitz@redhat.com>
diff mbox

Patch

diff --git a/blockdev.c b/blockdev.c
index 379a268..270425d 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2585,14 +2585,19 @@  fail:
 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
 {
     BlockJobInfoList **prev = opaque;
-    BlockJob *job = bs->job;
+    AioContext *aio_context;
+
+    aio_context = bdrv_get_aio_context(bs);
+    aio_context_acquire(aio_context);
 
-    if (job) {
+    if (bs->job) {
         BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
         elem->value = block_job_query(bs->job);
         (*prev)->next = elem;
         *prev = elem;
     }
+
+    aio_context_release(aio_context);
 }
 
 BlockJobInfoList *qmp_query_block_jobs(Error **errp)