[Qemu-devel] [PATCH 09/11] qmp: add interface blockdev-snapshot-delete-internal-sync

[Wenchao Xia <xiawenc@linux.vnet.ibm.com>]

Snapshot ID can't be specified in this interface.

Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
---
 blockdev.c       |   12 ++++++++++++
 qapi-schema.json |   19 +++++++++++++++++++
 qmp-commands.hx  |   30 ++++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+), 0 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index 6a952cd..0277482 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -802,6 +802,18 @@ void qmp_blockdev_snapshot_internal_sync(const char *device,
                        &snapshot, errp);
 }
 
+void qmp_blockdev_snapshot_delete_internal_sync(const char *device,
+                                                const char *name,
+                                                Error **errp)
+{
+    BlockDriverState *bs = bdrv_find(device);
+    if (!bs) {
+        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
+        return;
+    };
+
+    bdrv_snapshot_delete(bs, NULL, name, errp);
+}
 
 /* New and old BlockDriverState structs for group snapshots */
 
diff --git a/qapi-schema.json b/qapi-schema.json
index fd2f8ce..1860d31 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1710,6 +1710,25 @@
   'data': { 'device': 'str', '*name': 'str'} }
 
 ##
+# @blockdev-snapshot-delete-internal-sync
+#
+# Synchronously delete an internal snapshot of a block device, when the format
+# of the image used support it.
+#
+# @device: the name of the device to delete the snapshot from
+#
+# @name: the snapshot's name to be deleted
+#
+# Returns: nothing on success
+#          If @device is not a valid block device, DeviceNotFound
+#          If snapshot not found, generic error will be returned
+#
+# Since 1.6
+##
+{ 'command': 'blockdev-snapshot-delete-internal-sync',
+  'data': { 'device': 'str', 'name': 'str'} }
+
+##
 # @human-monitor-command:
 #
 # Execute a command on the human monitor and return the output.
diff --git a/qmp-commands.hx b/qmp-commands.hx
index e41e98a..675753f 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1075,6 +1075,36 @@ Example:
 EQMP
 
     {
+        .name       = "blockdev-snapshot-delete-internal-sync",
+        .args_type  = "device:B,name:s",
+        .mhandler.cmd_new =
+                      qmp_marshal_input_blockdev_snapshot_delete_internal_sync,
+    },
+
+SQMP
+blockdev-snapshot-delete-internal-sync
+--------------------------------------
+
+Synchronously delete an internal snapshot of a block device when the format of
+image used support it.  If the snapshot matching name is not found, operation
+will fail.
+
+Arguments:
+
+- "device": device name (json-string)
+- "name": name of the snapshot (json-string)
+
+Example:
+
+-> { "execute": "blockdev-snapshot-delete-internal-sync",
+                "arguments": { "device": "ide-hd0",
+                               "name": "snapshot0" }
+   }
+<- { "return": {} }
+
+EQMP
+
+    {
         .name       = "drive-mirror",
         .args_type  = "sync:s,device:B,target:s,speed:i?,mode:s?,format:s?,"
                       "on-source-error:s?,on-target-error:s?,"
-- 
1.7.1