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block: add snapshot info query function bdrv_query_snapshot_info_list()

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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>
This commit is contained in:
Wenchao Xia 2013-06-06 12:27:57 +08:00 • committed by Stefan Hajnoczi
parent bd07684aac
commit fb0ed4539c
3 changed files with 49 additions and 15 deletions
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5
qemu-img.c
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@ -1667,7 +1667,10 @@ static ImageInfoList *collect_image_info_list(const char *filename,
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;