From: Jes Sorensen <jes.soren...@redhat.com>
This is quivalent to snapshot_blkdev in the human monitor, with _sync
added to the command name to make it explicit that the command is
synchronous and leave space for a future async version.
Signed-off-by: Jes Sorensen <jes.soren...@redhat.com>
---
qmp-commands.hx | 26 ++++++++++++++++++++++++++
1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/qmp-commands.hx b/qmp-commands.hx
index fbd98ee..b8f537c 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -667,6 +667,32 @@ Example:
EQMP
{
+ .name = "blockdev-snapshot-sync",
+ .args_type = "device:B,snapshot_file:s?,format:s?",
+ .params = "device [new-image-file] [format]",
+ .user_print = monitor_user_noop,
+ .mhandler.cmd_new = do_snapshot_blkdev,
+ },
+
+SQMP
+Synchronous snapshot of block device, using snapshot file as target
+if provided.
+
+If a new image file is specified, the new image file will become the
+new root image. If format is specified, the snapshot file will be
+created in that format. Otherwise the snapshot will be internal!
+(currently unsupported).
+
+Errors:
+If creating the new snapshot image fails, QEMU will continue running
+on the original image. If switching to the newly created image fails,
+it will be attempted to fall back to the original image and return
+QERR_OPEN_FILE_FAILED with the snapshot filename. If re-opening
+the original image fails, QERR_OPEN_FILE_FAILED will be returned with
+the original image filename.
+EQMP
+
+ {
.name = "balloon",
.args_type = "value:M",
.params = "target",
--
1.7.4.4
