diff options
Diffstat (limited to 'block/mirror.c')
| -rw-r--r-- | block/mirror.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/block/mirror.c b/block/mirror.c index b48c3f8cf5..dd5ca02b09 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1499,6 +1499,11 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs, buf_size = DEFAULT_MIRROR_BUF_SIZE; } + if (bs == target) { + error_setg(errp, "Can't mirror node into itself"); + return; + } + /* In the case of active commit, add dummy driver to provide consistent * reads on the top, while disabling it in the intermediate nodes, and make * the backing chain writable. */ |