block: Mark bdrv_co_truncate() and callers GRAPH_RDLOCK

This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_truncate() 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: <20230203152202.49054-4-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/include/block/block-io.h b/include/block/block-io.h
index f9fa88204d..9a09ec2bdd 100644
--- a/include/block/block-io.h
+++ b/include/block/block-io.h
@@ -72,9 +72,9 @@ int coroutine_fn bdrv_co_pwrite_sync(BdrvChild *child, int64_t offset,
 int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset,
                                        int64_t bytes, BdrvRequestFlags flags);
 
-int coroutine_fn bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact,
-                                  PreallocMode prealloc, BdrvRequestFlags flags,
-                                  Error **errp);
+int coroutine_fn GRAPH_RDLOCK
+bdrv_co_truncate(BdrvChild *child, int64_t offset, bool exact,
+                 PreallocMode prealloc, BdrvRequestFlags flags, Error **errp);
 
 int64_t coroutine_fn bdrv_co_nb_sectors(BlockDriverState *bs);
 int64_t co_wrapper_mixed bdrv_nb_sectors(BlockDriverState *bs);