diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2023-05-10 22:35:54 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2023-05-19 19:12:12 +0200 |
| commit | 4db7ba3b87447fd06cd7e23dab69fdae6011496d (patch) | |
| tree | 573bd54b127d2127d927fe7534d4296dee4e4a1c /block/vpc.c | |
| parent | 41f8b633393021923fd555d8d94bded2f8f6f05d (diff) | |
block: Call .bdrv_co_create(_opts) unlocked
These are functions that modify the graph, so they must be able to take
a writer lock. This is impossible if they already hold the reader lock.
If they need a reader lock for some of their operations, they should
take it internally.
Many of them go through blk_*(), which will always take the lock itself.
Direct calls of bdrv_*() need to take the reader lock. Note that while
locking for bdrv_co_*() calls is checked by TSA, this is not the case
for the mixed_coroutine_fns bdrv_*(). Holding the lock is still required
when they are called from coroutine context like here!
This effectively reverts 4ec8df0183, but adds some internal locking
instead.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230510203601.418015-2-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/vpc.c')
| -rw-r--r-- | block/vpc.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/block/vpc.c b/block/vpc.c index 07ddda5b99..7ee7c7b4e0 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -967,8 +967,8 @@ static int calculate_rounded_image_size(BlockdevCreateOptionsVpc *vpc_opts, return 0; } -static int coroutine_fn vpc_co_create(BlockdevCreateOptions *opts, - Error **errp) +static int coroutine_fn GRAPH_UNLOCKED +vpc_co_create(BlockdevCreateOptions *opts, Error **errp) { BlockdevCreateOptionsVpc *vpc_opts; BlockBackend *blk = NULL; @@ -1087,7 +1087,7 @@ out: return ret; } -static int coroutine_fn GRAPH_RDLOCK +static int coroutine_fn GRAPH_UNLOCKED vpc_co_create_opts(BlockDriver *drv, const char *filename, QemuOpts *opts, Error **errp) { |