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authorKevin Wolf <kwolf@redhat.com>2023-09-29 16:51:53 +0200
committerKevin Wolf <kwolf@redhat.com>2023-10-12 16:31:33 +0200
commit018f9dea9c905506c49f8f37c018470dddfc50f1 (patch)
tree8eba2e1c435943d380b423301114ca415608d5b7 /block.c
parent277f2007ce187a6ff467579cb016824f80a2be10 (diff)
downloadfocaccia-qemu-018f9dea9c905506c49f8f37c018470dddfc50f1.tar.gz
focaccia-qemu-018f9dea9c905506c49f8f37c018470dddfc50f1.zip
block: Mark bdrv_apply_auto_read_only() and callers GRAPH_RDLOCK
This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_apply_auto_read_only() need to hold a reader lock for the graph
because it calls bdrv_can_set_read_only(), which indirectly accesses the
parents list of a node.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20230929145157.45443-19-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block.c')
-rw-r--r--block.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/block.c b/block.c
index fd348f5069..2ac7406c77 100644
--- a/block.c
+++ b/block.c
@@ -320,8 +320,6 @@ int bdrv_apply_auto_read_only(BlockDriverState *bs, const char *errmsg,
     int ret = 0;
     IO_CODE();
 
-    assume_graph_lock(); /* FIXME */
-
     if (!(bs->open_flags & BDRV_O_RDWR)) {
         return 0;
     }
@@ -1908,7 +1906,9 @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file,
 
     if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv, ro)) {
         if (!ro && bdrv_is_whitelisted(drv, true)) {
+            bdrv_graph_rdlock_main_loop();
             ret = bdrv_apply_auto_read_only(bs, NULL, NULL);
+            bdrv_graph_rdunlock_main_loop();
         } else {
             ret = -ENOTSUP;
         }