[Qemu-block] [PATCH 05/10] block: Accept device model name for x-blockdev-insert-medium

[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 x-blockdev-insert-medium to accept a qdev device name.

Signed-off-by: Kevin Wolf <address@hidden>
---
 blockdev.c           | 33 +++++++++++++++++----------------
 qapi/block-core.json |  7 +++++--
 qmp-commands.hx      |  6 ++++--
 3 files changed, 26 insertions(+), 20 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index ee3a153..645c639 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2465,34 +2465,26 @@ out:
     aio_context_release(aio_context);
 }
 
-static void qmp_blockdev_insert_anon_medium(const char *device,
+static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
                                             BlockDriverState *bs, Error **errp)
 {
-    BlockBackend *blk;
     bool has_device;
 
-    blk = blk_by_name(device);
-    if (!blk) {
-        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
-                  "Device '%s' not found", device);
-        return;
-    }
-
     /* For BBs without a device, we can exchange the BDS tree at will */
     has_device = blk_get_attached_dev(blk);
 
     if (has_device && !blk_dev_has_removable_media(blk)) {
-        error_setg(errp, "Device '%s' is not removable", device);
+        error_setg(errp, "Device is not removable");
         return;
     }
 
     if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
-        error_setg(errp, "Tray of device '%s' is not open", device);
+        error_setg(errp, "Tray of the device is not open");
         return;
     }
 
     if (blk_bs(blk)) {
-        error_setg(errp, "There already is a medium in device '%s'", device);
+        error_setg(errp, "There already is a medium in the device");
         return;
     }
 
@@ -2508,11 +2500,20 @@ static void qmp_blockdev_insert_anon_medium(const char 
*device,
     }
 }
 
-void qmp_x_blockdev_insert_medium(const char *device, const char *node_name,
-                                  Error **errp)
+void qmp_x_blockdev_insert_medium(bool has_device, const char *device,
+                                  bool has_id, const char *id,
+                                  const char *node_name, Error **errp)
 {
+    BlockBackend *blk;
     BlockDriverState *bs;
 
+    blk = qmp_get_blk(has_device ? device : NULL,
+                      has_id ? id : NULL,
+                      errp);
+    if (!blk) {
+        return;
+    }
+
     bs = bdrv_find_node(node_name);
     if (!bs) {
         error_setg(errp, "Node '%s' not found", node_name);
@@ -2525,7 +2526,7 @@ void qmp_x_blockdev_insert_medium(const char *device, 
const char *node_name,
         return;
     }
 
-    qmp_blockdev_insert_anon_medium(device, bs, errp);
+    qmp_blockdev_insert_anon_medium(blk, bs, errp);
 }
 
 void qmp_blockdev_change_medium(const char *device, const char *filename,
@@ -2606,7 +2607,7 @@ void qmp_blockdev_change_medium(const char *device, const 
char *filename,
         goto fail;
     }
 
-    qmp_blockdev_insert_anon_medium(device, medium_bs, &err);
+    qmp_blockdev_insert_anon_medium(blk, medium_bs, &err);
     if (err) {
         error_propagate(errp, err);
         goto fail;
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 069c699..2625bf8 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -2380,14 +2380,17 @@
 # This command is still a work in progress and is considered experimental.
 # Stay away from it unless you want to help with its development.
 #
-# @device:    block device name
+# @device:    block device name (deprecated, use @id instead)
+#
+# @id:        the name or QOM path of the guest device (since: 2.8)
 #
 # @node-name: name of a node in the block driver state graph
 #
 # Since: 2.5
 ##
 { 'command': 'x-blockdev-insert-medium',
-  'data': { 'device': 'str',
+  'data': { '*device': 'str',
+            '*id': 'str',
             'node-name': 'str'} }
 
 
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 0fd679c..b3aed7f 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -4412,7 +4412,7 @@ EQMP
 
     {
         .name       = "x-blockdev-insert-medium",
-        .args_type  = "device:s,node-name:s",
+        .args_type  = "device:s?,id:s?,node-name:s",
         .mhandler.cmd_new = qmp_marshal_x_blockdev_insert_medium,
     },
 
@@ -4429,7 +4429,9 @@ Stay away from it unless you want to help with its 
development.
 
 Arguments:
 
-- "device": block 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)
 - "node-name": root node of the BDS tree to insert into the block device
 
 Example:
-- 
1.8.3.1