Data:
-- "type": Job type ("stream" for image streaming, json-string)
+- "type": Job type (json-string; "stream" for image streaming
+ "commit" for block commit)
- "device": Device name (json-string)
- "len": Maximum progress value (json-int)
- "offset": Current progress value (json-int)
Data:
-- "type": Job type ("stream" for image streaming, json-string)
+- "type": Job type (json-string; "stream" for image streaming
+ "commit" for block commit)
- "device": Device name (json-string)
- "len": Maximum progress value (json-int)
- "offset": Current progress value (json-int)
trace_qmp_block_stream(bs, bs->job);
}
+void qmp_block_commit(const char *device,
+ bool has_base, const char *base, const char *top,
+ bool has_speed, int64_t speed,
+ Error **errp)
+{
+ BlockDriverState *bs;
+ BlockDriverState *base_bs, *top_bs;
+ Error *local_err = NULL;
+ /* This will be part of the QMP command, if/when the
+ * BlockdevOnError change for blkmirror makes it in
+ */
+ BlockErrorAction on_error = BLOCK_ERR_REPORT;
+
+ /* drain all i/o before commits */
+ bdrv_drain_all();
+
+ bs = bdrv_find(device);
+ if (!bs) {
+ error_set(errp, QERR_DEVICE_NOT_FOUND, device);
+ return;
+ }
+ if (base && has_base) {
+ base_bs = bdrv_find_backing_image(bs, base);
+ } else {
+ base_bs = bdrv_find_base(bs);
+ }
+
+ if (base_bs == NULL) {
+ error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
+ return;
+ }
+
+ /* default top_bs is the active layer */
+ top_bs = bs;
+
+ if (top) {
+ if (strcmp(bs->filename, top) != 0) {
+ top_bs = bdrv_find_backing_image(bs, top);
+ }
+ }
+
+ if (top_bs == NULL) {
+ error_setg(errp, "Top image file %s not found", top ? top : "NULL");
+ return;
+ }
+
+ commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
+ &local_err);
+ if (local_err != NULL) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ /* Grab a reference so hotplug does not delete the BlockDriverState from
+ * underneath us.
+ */
+ drive_get_ref(drive_get_by_blockdev(bs));
+}
+
static BlockJob *find_block_job(const char *device)
{
BlockDriverState *bs;
'returns': 'str' }
##
+# @block-commit
+#
+# Live commit of data from overlay image nodes into backing nodes - i.e.,
+# writes data between 'top' and 'base' into 'base'.
+#
+# @device: the name of the device
+#
+# @base: #optional The file name of the backing image to write data into.
+# If not specified, this is the deepest backing image
+#
+# @top: The file name of the backing image within the image chain,
+# which contains the topmost data to be committed down.
+# Note, the active layer as 'top' is currently unsupported.
+#
+# If top == base, that is an error.
+#
+#
+# @speed: #optional the maximum speed, in bytes per second
+#
+# Returns: Nothing on success
+# If commit or stream is already active on this device, DeviceInUse
+# If @device does not exist, DeviceNotFound
+# If image commit is not supported by this device, NotSupported
+# If @base or @top is invalid, a generic error is returned
+# If @top is the active layer, or omitted, a generic error is returned
+# If @speed is invalid, InvalidParameter
+#
+# Since: 1.3
+#
+##
+{ 'command': 'block-commit',
+ 'data': { 'device': 'str', '*base': 'str', 'top': 'str',
+ '*speed': 'int' } }
+
# @migrate_cancel
#
# Cancel the current executing migration process.
.mhandler.cmd_new = qmp_marshal_input_block_stream,
},
+ {
+ .name = "block-commit",
+ .args_type = "device:B,base:s?,top:s,speed:o?",
+ .mhandler.cmd_new = qmp_marshal_input_block_commit,
+ },
+
{
.name = "block-job-set-speed",
.args_type = "device:B,speed:o",