Currently there is no way to query BlockStats of the backing chain. This
adds "backing" field into BlockStats to make it possible.
The comment of "parent" is reworded.
Signed-off-by: Fam Zheng <f...@redhat.com>
---
v2: Only add "backing", drop "file".
Signed-off-by: Fam Zheng <f...@redhat.com>
---
block/qapi.c | 5 +++++
qapi-schema.json | 10 ++++++----
2 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/block/qapi.c b/block/qapi.c
index a32cb79..98b1b83 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -318,6 +318,11 @@ BlockStats *bdrv_query_stats(const BlockDriverState *bs)
s->parent = bdrv_query_stats(bs->file);
}
+ if (bs->backing_hd) {
+ s->has_backing = true;
+ s->backing = bdrv_query_stats(bs->backing_hd);
+ }
+
return s;
}
diff --git a/qapi-schema.json b/qapi-schema.json
index f27c48a..0e534d0 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1022,15 +1022,17 @@
#
# @stats: A @BlockDeviceStats for the device.
#
-# @parent: #optional This may point to the backing block device if this is a
-# a virtual block device. If it's a backing block, this will point
-# to the backing file is one is present.
+# @parent: #optional This describes the file block device if it has one.
+#
+# @backing: #optional This describes the backing block device if it has one.
+# (Since 2.0)
#
# Since: 0.14.0
##
{ 'type': 'BlockStats',
'data': {'*device': 'str', 'stats': 'BlockDeviceStats',
- '*parent': 'BlockStats'} }
+ '*parent': 'BlockStats',
+ '*backing': 'BlockStats'} }
##
# @query-blockstats:
--
1.8.5.3
