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block: Mark bdrv_parent_cb_change_media() GRAPH_RDLOCK

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The function reads the parents list, so it needs to hold the graph lock.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20230911094620.45040-17-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-09-11 11:46:15 +02:00
parent c629b6d223
commit 356f4ef611
1 changed files with 5 additions and 1 deletions
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6
block.c
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@ -3371,7 +3371,8 @@ void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child)
}
static void bdrv_parent_cb_change_media(BlockDriverState *bs, bool load)
static void GRAPH_RDLOCK
bdrv_parent_cb_change_media(BlockDriverState *bs, bool load)
{
BdrvChild *c;
GLOBAL_STATE_CODE();
@ -3969,6 +3970,9 @@ bdrv_open_inherit(const char *filename, const char *reference, QDict *options,
GLOBAL_STATE_CODE();
assert(!qemu_in_coroutine());
/* TODO We'll eventually have to take a writer lock in this function */
GRAPH_RDLOCK_GUARD_MAINLOOP();
if (reference) {
bool options_non_empty = options ? qdict_size(options) : false;
qobject_unref(options);