qmp: Add QMP query-named-block-nodes to list the named BlockDriverState nodes.

Signed-off-by: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 55 insertions, 54 deletions

diff --git a/block/qapi.c b/block/qapi.c
index 98b1b83..8f4134b 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -29,6 +29,60 @@
 #include "qapi/qmp-output-visitor.h"
 #include "qapi/qmp/types.h"
 
+BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs)
+{
+    BlockDeviceInfo *info = g_malloc0(sizeof(*info));
+
+    info->file                   = g_strdup(bs->filename);
+    info->ro                     = bs->read_only;
+    info->drv                    = g_strdup(bs->drv->format_name);
+    info->encrypted              = bs->encrypted;
+    info->encryption_key_missing = bdrv_key_required(bs);
+
+    if (bs->node_name[0]) {
+        info->has_node_name = true;
+        info->node_name = g_strdup(bs->node_name);
+    }
+
+    if (bs->backing_file[0]) {
+        info->has_backing_file = true;
+        info->backing_file = g_strdup(bs->backing_file);
+    }
+
+    info->backing_file_depth = bdrv_get_backing_file_depth(bs);
+
+    if (bs->io_limits_enabled) {
+        ThrottleConfig cfg;
+        throttle_get_config(&bs->throttle_state, &cfg);
+        info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
+        info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
+        info->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
+
+        info->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
+        info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
+        info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
+
+        info->has_bps_max     = cfg.buckets[THROTTLE_BPS_TOTAL].max;
+        info->bps_max         = cfg.buckets[THROTTLE_BPS_TOTAL].max;
+        info->has_bps_rd_max  = cfg.buckets[THROTTLE_BPS_READ].max;
+        info->bps_rd_max      = cfg.buckets[THROTTLE_BPS_READ].max;
+        info->has_bps_wr_max  = cfg.buckets[THROTTLE_BPS_WRITE].max;
+        info->bps_wr_max      = cfg.buckets[THROTTLE_BPS_WRITE].max;
+
+        info->has_iops_max    = cfg.buckets[THROTTLE_OPS_TOTAL].max;
+        info->iops_max        = cfg.buckets[THROTTLE_OPS_TOTAL].max;
+        info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max;
+        info->iops_rd_max     = cfg.buckets[THROTTLE_OPS_READ].max;
+        info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
+        info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;
+
+        info->has_iops_size = cfg.op_size;
+        info->iops_size = cfg.op_size;
+    }
+
+    return info;
+}
+
 /*
  * Returns 0 on success, with *p_list either set to describe snapshot
  * information, or NULL because there are no snapshots.  Returns -errno on
@@ -211,60 +265,7 @@ void bdrv_query_info(BlockDriverState *bs,
 
     if (bs->drv) {
         info->has_inserted = true;
-        info->inserted = g_malloc0(sizeof(*info->inserted));
-        info->inserted->file = g_strdup(bs->filename);
-        info->inserted->ro = bs->read_only;
-        info->inserted->drv = g_strdup(bs->drv->format_name);
-        info->inserted->encrypted = bs->encrypted;
-        info->inserted->encryption_key_missing = bdrv_key_required(bs);
-
-        if (bs->backing_file[0]) {
-            info->inserted->has_backing_file = true;
-            info->inserted->backing_file = g_strdup(bs->backing_file);
-        }
-
-        info->inserted->backing_file_depth = bdrv_get_backing_file_depth(bs);
-
-        if (bs->io_limits_enabled) {
-            ThrottleConfig cfg;
-            throttle_get_config(&bs->throttle_state, &cfg);
-            info->inserted->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
-            info->inserted->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
-            info->inserted->bps_wr  = cfg.buckets[THROTTLE_BPS_WRITE].avg;
-
-            info->inserted->iops    = cfg.buckets[THROTTLE_OPS_TOTAL].avg;
-            info->inserted->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg;
-            info->inserted->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg;
-
-            info->inserted->has_bps_max     =
-                cfg.buckets[THROTTLE_BPS_TOTAL].max;
-            info->inserted->bps_max         =
-                cfg.buckets[THROTTLE_BPS_TOTAL].max;
-            info->inserted->has_bps_rd_max  =
-                cfg.buckets[THROTTLE_BPS_READ].max;
-            info->inserted->bps_rd_max      =
-                cfg.buckets[THROTTLE_BPS_READ].max;
-            info->inserted->has_bps_wr_max  =
-                cfg.buckets[THROTTLE_BPS_WRITE].max;
-            info->inserted->bps_wr_max      =
-                cfg.buckets[THROTTLE_BPS_WRITE].max;
-
-            info->inserted->has_iops_max    =
-                cfg.buckets[THROTTLE_OPS_TOTAL].max;
-            info->inserted->iops_max        =
-                cfg.buckets[THROTTLE_OPS_TOTAL].max;
-            info->inserted->has_iops_rd_max =
-                cfg.buckets[THROTTLE_OPS_READ].max;
-            info->inserted->iops_rd_max     =
-                cfg.buckets[THROTTLE_OPS_READ].max;
-            info->inserted->has_iops_wr_max =
-                cfg.buckets[THROTTLE_OPS_WRITE].max;
-            info->inserted->iops_wr_max     =
-                cfg.buckets[THROTTLE_OPS_WRITE].max;
-
-            info->inserted->has_iops_size = cfg.op_size;
-            info->inserted->iops_size = cfg.op_size;
-        }
+        info->inserted = bdrv_block_device_info(bs);
 
         bs0 = bs;
         p_image_info = &info->inserted->image;