qapi: Convert block_resize

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

blockdev.c

@@ -861,27 +861,23 @@ int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
  * existing QERR_ macro mess is cleaned up.  A good example for better
  * error reports can be found in the qemu-img resize code.
  */
-int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data)
+void qmp_block_resize(const char *device, int64_t size, Error **errp)
 {
-    const char *device = qdict_get_str(qdict, "device");
-    int64_t size = qdict_get_int(qdict, "size");
     BlockDriverState *bs;
 
     bs = bdrv_find(device);
     if (!bs) {
-        qerror_report(QERR_DEVICE_NOT_FOUND, device);
-        return -1;
+        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
+        return;
     }
 
     if (size < 0) {
-        qerror_report(QERR_UNDEFINED_ERROR);
-        return -1;
+        error_set(errp, QERR_UNDEFINED_ERROR);
+        return;
     }
 
     if (bdrv_truncate(bs, size)) {
-        qerror_report(QERR_UNDEFINED_ERROR);
-        return -1;
+        error_set(errp, QERR_UNDEFINED_ERROR);
+        return;
     }
-
-    return 0;
 }

blockdev.h

@@ -65,6 +65,5 @@ int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
 int do_block_set_io_throttle(Monitor *mon,
                              const QDict *qdict, QObject **ret_data);
 int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data);
-int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data);
 
 #endif

hmp-commands.hx

@@ -57,8 +57,7 @@ ETEXI
         .args_type  = "device:B,size:o",
         .params     = "device size",
         .help       = "resize a block image",
-        .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_block_resize,
+        .mhandler.cmd = hmp_block_resize,
     },
 
 STEXI

hmp.c

@@ -633,3 +633,13 @@ void hmp_balloon(Monitor *mon, const QDict *qdict)
         error_free(errp);
     }
 }
+
+void hmp_block_resize(Monitor *mon, const QDict *qdict)
+{
+    const char *device = qdict_get_str(qdict, "device");
+    int64_t size = qdict_get_int(qdict, "size");
+    Error *errp = NULL;
+
+    qmp_block_resize(device, size, &errp);
+    hmp_handle_error(mon, &errp);
+}

hmp.h

@@ -44,5 +44,6 @@ void hmp_inject_nmi(Monitor *mon, const QDict *qdict);
 void hmp_set_link(Monitor *mon, const QDict *qdict);
 void hmp_block_passwd(Monitor *mon, const QDict *qdict);
 void hmp_balloon(Monitor *mon, const QDict *qdict);
+void hmp_block_resize(Monitor *mon, const QDict *qdict);
 
 #endif

qapi-schema.json

@@ -1052,3 +1052,21 @@
 # Since: 0.14.0
 ##
 { 'command': 'balloon', 'data': {'value': 'int'} }
+
+##
+# @block_resize
+#
+# Resize a block image while a guest is running.
+#
+# @device:  the name of the device to get the image resized
+#
+# @size:  new image size in bytes
+#
+# Returns: nothing on success
+#          If @device is not a valid block device, DeviceNotFound
+#
+# Notes: This command returns UndefinedError in a number of error conditions.
+#
+# Since: 0.14.0
+##
+{ 'command': 'block_resize', 'data': { 'device': 'str', 'size': 'int' }}

qmp-commands.hx

@@ -642,10 +642,7 @@ EQMP
     {
         .name       = "block_resize",
         .args_type  = "device:B,size:o",
-        .params     = "device size",
-        .help       = "resize a block image",
-        .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_block_resize,
+        .mhandler.cmd_new = qmp_marshal_input_block_resize,
     },
 
 SQMP