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block: Mark bdrv_co_pwrite_sync() and callers GRAPH_RDLOCK

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This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_pwrite_sync() need to hold a reader lock for the graph.

For some places, we know that they will hold the lock, but we don't have
the GRAPH_RDLOCK annotations yet. In this case, add assume_graph_lock()
with a FIXME comment. These places will be removed once everything is
properly annotated.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-13-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-02-03 16:21:51 +01:00
parent b9b10c35e5
commit b24a4c41ba
3 changed files with 6 additions and 6 deletions
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7
include/block/block-io.h
View file

@ -60,9 +60,10 @@ int co_wrapper_mixed_bdrv_rdlock
bdrv_pwrite_sync(BdrvChild *child, int64_t offset, int64_t bytes,
const void *buf, BdrvRequestFlags flags);
int coroutine_fn bdrv_co_pwrite_sync(BdrvChild *child, int64_t offset,
int64_t bytes, const void *buf,
BdrvRequestFlags flags);
int coroutine_fn GRAPH_RDLOCK
bdrv_co_pwrite_sync(BdrvChild *child, int64_t offset, int64_t bytes,
const void *buf, BdrvRequestFlags flags);
/*
* Efficiently zero a region of the disk image. Note that this is a regular
* I/O request like read or write and should have a reasonable size. This