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qapi: Add "backing" to BlockStats

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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
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@ -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;
}