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| author | Emanuele Giuseppe Esposito <eesposit@redhat.com> | 2023-05-04 13:57:45 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2023-05-10 14:16:54 +0200 |
| commit | cb2bfaa450dd65b717e27c9090169be05bd73b93 (patch) | |
| tree | b5ba5e723648a398854570d40d0dfbbdfac54002 | |
| parent | a00e70c01241590b6c80dca4ee39b9de0b10097e (diff) | |
| download | focaccia-qemu-cb2bfaa450dd65b717e27c9090169be05bd73b93.tar.gz focaccia-qemu-cb2bfaa450dd65b717e27c9090169be05bd73b93.zip | |
block: Mark bdrv_co_debug_event() GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of bdrv_co_debug_event() need to hold a reader lock for the graph. Unfortunately we cannot use a co_wrapper_bdrv_rdlock (i.e. make the coroutine wrapper a no_coroutine_fn), because the function is called (using the BLKDBG_EVENT macro) by mixed functions that run both in coroutine and non-coroutine context (for example many of the functions in qcow2-cluster.c and qcow2-refcount.c). Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20230504115750.54437-16-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | block.c | 2 | ||||
| -rw-r--r-- | include/block/block-io.h | 9 | ||||
| -rw-r--r-- | include/block/block_int-common.h | 4 |
3 files changed, 9 insertions, 6 deletions
diff --git a/block.c b/block.c index a6deaf8ad1..1bc766c778 100644 --- a/block.c +++ b/block.c @@ -6399,6 +6399,8 @@ BlockStatsSpecific *bdrv_get_specific_stats(BlockDriverState *bs) void coroutine_fn bdrv_co_debug_event(BlockDriverState *bs, BlkdebugEvent event) { IO_CODE(); + assert_bdrv_graph_readable(); + if (!bs || !bs->drv || !bs->drv->bdrv_co_debug_event) { return; } diff --git a/include/block/block-io.h b/include/block/block-io.h index bba7f957e1..1f612ec5bd 100644 --- a/include/block/block-io.h +++ b/include/block/block-io.h @@ -205,10 +205,11 @@ void *qemu_try_blockalign0(BlockDriverState *bs, size_t size); void bdrv_enable_copy_on_read(BlockDriverState *bs); void bdrv_disable_copy_on_read(BlockDriverState *bs); -void coroutine_fn bdrv_co_debug_event(BlockDriverState *bs, - BlkdebugEvent event); -void co_wrapper_mixed bdrv_debug_event(BlockDriverState *bs, - BlkdebugEvent event); +void coroutine_fn GRAPH_RDLOCK +bdrv_co_debug_event(BlockDriverState *bs, BlkdebugEvent event); + +void co_wrapper_mixed_bdrv_rdlock +bdrv_debug_event(BlockDriverState *bs, BlkdebugEvent event); #define BLKDBG_EVENT(child, evt) \ do { \ diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index ee77903f72..88ce7f9d9e 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -735,8 +735,8 @@ struct BlockDriver { int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_check)( BlockDriverState *bs, BdrvCheckResult *result, BdrvCheckMode fix); - void coroutine_fn (*bdrv_co_debug_event)(BlockDriverState *bs, - BlkdebugEvent event); + void coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_debug_event)( + BlockDriverState *bs, BlkdebugEvent event); /* io queue for linux-aio */ void coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_io_plug)(BlockDriverState *bs); |