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block: Mark bdrv_co_pdiscard() and callers GRAPH_RDLOCK

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This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_pdiscard() 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: <20230203152202.49054-9-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Emanuele Giuseppe Esposito
2023-02-03 16:21:47 +01:00
committed by Kevin Wolf
parent 8809534933
commit 9a5a1c621e
16 changed files with 47 additions and 37 deletions
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block/block-backend.c
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@@ -1719,6 +1719,7 @@ blk_co_do_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes)
IO_CODE();
blk_wait_while_drained(blk);
GRAPH_RDLOCK_GUARD();
ret = blk_check_byte_request(blk, offset, bytes);
if (ret < 0) {