block: add snapshot info query function bdrv_query_snapshot_info_list()
This patch adds function bdrv_query_snapshot_info_list(), which will
retrieve snapshot info of an image in qmp object format. The implementation
is based on the code moved from qemu-img.c with modification to fit more
for qmp based block layer API.
Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/qemu-img.c b/qemu-img.c
index e089c78..e3d8fe3 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1667,7 +1667,10 @@
info = g_new0(ImageInfo, 1);
bdrv_collect_image_info(bs, info, filename);
- bdrv_collect_snapshots(bs, info);
+ bdrv_query_snapshot_info_list(bs, &info->snapshots, NULL);
+ if (info->snapshots) {
+ info->has_snapshots = true;
+ }
elem = g_new0(ImageInfoList, 1);
elem->value = info;
