[Qemu-devel] [PATCH] block: add the optional file entry to query-block

[Federico Simoncelli <fsimonce@redhat.com>]

This patch adds the optional file entry to the query-block output.
The value is a json-object representing the information about the
underlying file or device (when present).

Signed-off-by: Federico Simoncelli <fsimonce@redhat.com>
---
 block/qapi.c               |    9 ++++++++-
 qapi-schema.json           |    4 +++-
 qmp-commands.hx            |    8 ++++++++
 tests/qemu-iotests/043.out |   15 +++++++++++++++
 4 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/block/qapi.c b/block/qapi.c
index a4bc411..03cd222 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -119,7 +119,7 @@ void bdrv_query_image_info(BlockDriverState *bs,
 
     info->filename        = g_strdup(bs->filename);
     info->format          = g_strdup(bdrv_get_format_name(bs));
-    info->virtual_size    = total_sectors * 512;
+    info->virtual_size    = bdrv_getlength(bs);
     info->actual_size     = bdrv_get_allocated_file_size(bs);
     info->has_actual_size = info->actual_size >= 0;
     if (bdrv_is_encrypted(bs)) {
@@ -171,6 +171,13 @@ void bdrv_query_image_info(BlockDriverState *bs,
         return;
     }
 
+    if (bs->file) {
+        bdrv_query_image_info(bs->file, &info->file, &err);
+        if (info->file) {
+            info->has_file = true;
+        }
+    }
+
     *p_info = info;
 }
 
diff --git a/qapi-schema.json b/qapi-schema.json
index a30a728..524a4a0 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -238,6 +238,8 @@
 #
 # @backing-image: #optional info of the backing image (since 1.6)
 #
+# @file: #optional info of the underlying file (since 1.6)
+#
 # Since: 1.3
 #
 ##
@@ -248,7 +250,7 @@
            '*cluster-size': 'int', '*encrypted': 'bool',
            '*backing-filename': 'str', '*full-backing-filename': 'str',
            '*backing-filename-format': 'str', '*snapshots': ['SnapshotInfo'],
-           '*backing-image': 'ImageInfo' } }
+           '*backing-image': 'ImageInfo', '*file': 'ImageInfo' } }
 
 ##
 # @ImageCheck:
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 8cea5e5..c25ac77 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1745,6 +1745,8 @@ Each json-object contain the following:
              - "backing-image": the detail of the backing image, it is an
                                 optional json-object only present when a
                                 backing image present for this image
+             - "file": an optional json-object representing the information
+                       about the underlying file or device (when present)
 
 - "io-status": I/O operation status, only present if the device supports it
                and the VM is configured to stop on errors. It's always reset
@@ -1796,6 +1798,12 @@ Example:
                       "format":"qcow2",
                       "virtual-size":2048000
                   }
+                  "file":{
+                      "filename":"disks/test.qcow2",
+                      "format": "file",
+                      "virtual-size": 262144,
+                      "actual-size": 139264
+                  }
                }
             },
             "type":"unknown"
diff --git a/tests/qemu-iotests/043.out b/tests/qemu-iotests/043.out
index ad23337..6aea37b 100644
--- a/tests/qemu-iotests/043.out
+++ b/tests/qemu-iotests/043.out
@@ -44,6 +44,11 @@ cluster_size: 65536
         "filename": "TEST_DIR/t.IMGFMT", 
         "cluster-size": 65536, 
         "format": "IMGFMT", 
+        "file": {
+            "virtual-size": 327680, 
+            "filename": "TEST_DIR/t.IMGFMT", 
+            "format": "file", 
+        }, 
         "backing-filename": "TEST_DIR/t.IMGFMT.2.base", 
         "dirty-flag": false
     }, 
@@ -52,6 +57,11 @@ cluster_size: 65536
         "filename": "TEST_DIR/t.IMGFMT.2.base", 
         "cluster-size": 65536, 
         "format": "IMGFMT", 
+        "file": {
+            "virtual-size": 327680, 
+            "filename": "TEST_DIR/t.IMGFMT.2.base", 
+            "format": "file", 
+        }, 
         "backing-filename": "TEST_DIR/t.IMGFMT.1.base", 
         "dirty-flag": false
     }, 
@@ -60,6 +70,11 @@ cluster_size: 65536
         "filename": "TEST_DIR/t.IMGFMT.1.base", 
         "cluster-size": 65536, 
         "format": "IMGFMT", 
+        "file": {
+            "virtual-size": 327680, 
+            "filename": "TEST_DIR/t.IMGFMT.1.base", 
+            "format": "file", 
+        }, 
         "dirty-flag": false
     }
 ]
-- 
1.7.1