Fix -snapshot deleting images on disk change

[qemu.git] / blockdev.c

diff --git a/blockdev.c b/blockdev.c
index 0a9dec364e40eef673e1f87b0e5ee2c2b5a1194a..01e402bf3d079672efb40160b4df6314756fcc51 100644 (file)
--- a/blockdev.c
+++ b/blockdev.c
@@ -590,6 +590,7 @@ int do_change_block(Monitor *mon, const char *device,
         return -1;
     }
     bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
+    bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
     if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
         qerror_report(QERR_OPEN_FILE_FAILED, filename);
         return -1;