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block: Mark bdrv_first_blk() and bdrv_is_root_node() GRAPH_RDLOCK

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This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_first_blk() and bdrv_is_root_node() need to hold a reader lock
for the graph. These functions are the only functions in block-backend.c
that access the parent list of a node.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20230929145157.45443-5-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-09-29 16:51:39 +02:00
parent 0e6bad1f21
commit 2b3912f135
14 changed files with 53 additions and 13 deletions
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3
tests/unit/test-block-iothread.c
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@ -383,6 +383,9 @@ static void test_sync_op_check(BdrvChild *c)
static void test_sync_op_activate(BdrvChild *c)
{
GLOBAL_STATE_CODE();
GRAPH_RDLOCK_GUARD_MAINLOOP();
/* Early success: Image is not inactive */
bdrv_activate(c->bs, NULL);
}