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qapi: Add "backing" to BlockStats 

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 <famz@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2014-01-23 10:03:26 +08:00 committed by Kevin Wolf
parent d8a7b061ae
commit c8059b97e1
2 changed files with 11 additions and 4 deletions
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5
block/qapi.c
View File

@ -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;
}

10
qapi-schema.json
View File

@ -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: