diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2023-10-27 17:53:14 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2023-11-07 19:14:19 +0100 |
| commit | f3bbc53dc56c5d410f76442da6ad15ec8f9439fc (patch) | |
| tree | cd6a05dfd503b5922695d95c1843e5d71d428401 /block/stream.c | |
| parent | 03b9eaca540322dd6dd4810aa57f3196ce971542 (diff) | |
block: Mark block_job_add_bdrv() GRAPH_WRLOCK
Instead of taking the writer lock internally, require callers to already
hold it when calling block_job_add_bdrv(). These callers will typically
already hold the graph lock once the locking work is completed, which
means that they can't call functions that take it internally.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231027155333.420094-6-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/stream.c')
| -rw-r--r-- | block/stream.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/stream.c b/block/stream.c index b22d9c236b..51333e460b 100644 --- a/block/stream.c +++ b/block/stream.c @@ -352,8 +352,10 @@ void stream_start(const char *job_id, BlockDriverState *bs, * already have our own plans. Also don't allow resize as the image size is * queried only at the job start and then cached. */ + bdrv_graph_wrlock(bs); if (block_job_add_bdrv(&s->common, "active node", bs, 0, basic_flags | BLK_PERM_WRITE, errp)) { + bdrv_graph_wrunlock(); goto fail; } @@ -373,9 +375,11 @@ void stream_start(const char *job_id, BlockDriverState *bs, ret = block_job_add_bdrv(&s->common, "intermediate node", iter, 0, basic_flags, errp); if (ret < 0) { + bdrv_graph_wrunlock(); goto fail; } } + bdrv_graph_wrunlock(); s->base_overlay = base_overlay; s->above_base = above_base; |