[Qemu-block] [PATCH 09/10] block: Accept device model name for block_set_io_throttle

[Kevin Wolf]

In order to remove the necessity to use BlockBackend names in the
external API, we want to allow qdev device names in all device related
commands.

This converts block_set_io_throttle to accept a qdev device name.

Signed-off-by: Kevin Wolf <address@hidden>
---
 blockdev.c           | 12 +++++++-----
 qapi/block-core.json |  6 ++++--
 qmp-commands.hx      |  6 ++++--
 3 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index 6f81b07..6865c2d 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2643,10 +2643,10 @@ void qmp_block_set_io_throttle(BlockIOThrottle *arg, 
Error **errp)
     BlockBackend *blk;
     AioContext *aio_context;
 
-    blk = blk_by_name(arg->device);
+    blk = qmp_get_blk(arg->has_device ? arg->device : NULL,
+                      arg->has_id ? arg->id : NULL,
+                      errp);
     if (!blk) {
-        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
-                  "Device '%s' not found", arg->device);
         return;
     }
 
@@ -2655,7 +2655,7 @@ void qmp_block_set_io_throttle(BlockIOThrottle *arg, 
Error **errp)
 
     bs = blk_bs(blk);
     if (!bs) {
-        error_setg(errp, "Device '%s' has no medium", arg->device);
+        error_setg(errp, "Device has no medium");
         goto out;
     }
 
@@ -2719,7 +2719,9 @@ void qmp_block_set_io_throttle(BlockIOThrottle *arg, 
Error **errp)
          * just update the throttling group. */
         if (!blk_get_public(blk)->throttle_state) {
             blk_io_limits_enable(blk,
-                                 arg->has_group ? arg->group : arg->device);
+                                 arg->has_group ? arg->group :
+                                 arg->has_device ? arg->device :
+                                 arg->id);
         } else if (arg->has_group) {
             blk_io_limits_update_group(blk, arg->group);
         }
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 9a19a50..b4a5bdb 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1378,6 +1378,8 @@
 #
 # @device: The name of the device
 #
+# @id: the name or QOM path of the guest device (since: 2.8)
+#
 # @bps: total throughput limit in bytes per second
 #
 # @bps_rd: read throughput limit in bytes per second
@@ -1445,8 +1447,8 @@
 # Since: 1.1
 ##
 { 'struct': 'BlockIOThrottle',
-  'data': { 'device': 'str', 'bps': 'int', 'bps_rd': 'int', 'bps_wr': 'int',
-            'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
+  'data': { '*device': 'str', '*id': 'str', 'bps': 'int', 'bps_rd': 'int',
+            'bps_wr': 'int', 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
             '*bps_max': 'int', '*bps_rd_max': 'int',
             '*bps_wr_max': 'int', '*iops_max': 'int',
             '*iops_rd_max': 'int', '*iops_wr_max': 'int',
diff --git a/qmp-commands.hx b/qmp-commands.hx
index b11e4e4..b58d9d9 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2084,7 +2084,7 @@ EQMP
 
     {
         .name       = "block_set_io_throttle",
-        .args_type  = 
"device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_max:l?,bps_rd_max:l?,bps_wr_max:l?,iops_max:l?,iops_rd_max:l?,iops_wr_max:l?,bps_max_length:l?,bps_rd_max_length:l?,bps_wr_max_length:l?,iops_max_length:l?,iops_rd_max_length:l?,iops_wr_max_length:l?,iops_size:l?,group:s?",
+        .args_type  = 
"device:B?,id:s?,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l,bps_max:l?,bps_rd_max:l?,bps_wr_max:l?,iops_max:l?,iops_rd_max:l?,iops_wr_max:l?,bps_max_length:l?,bps_rd_max_length:l?,bps_wr_max_length:l?,iops_max_length:l?,iops_rd_max_length:l?,iops_wr_max_length:l?,iops_size:l?,group:s?",
         .mhandler.cmd_new = qmp_marshal_block_set_io_throttle,
     },
 
@@ -2096,7 +2096,9 @@ Change I/O throttle limits for a block drive.
 
 Arguments:
 
-- "device": device name (json-string)
+- "device": block device name (deprecated, use @id instead)
+            (json-string, optional)
+- "id": the name or QOM path of the guest device (json-string, optional)
 - "bps": total throughput limit in bytes per second (json-int)
 - "bps_rd": read throughput limit in bytes per second (json-int)
 - "bps_wr": write throughput limit in bytes per second (json-int)
-- 
1.8.3.1