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block: Include "node-name" if present in query-blockstats

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Node name is a better identifier of BDS.

We will want to query statistics of a BDS node buried in the BDS graph,
so reporting the node's name if there is one will do the trick.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2014-10-31 11:32:56 +08:00 committed by Kevin Wolf
parent 20a9e77dfa
commit 4875a77950
2 changed files with 9 additions and 1 deletions
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5
block/qapi.c
View file

@ -311,6 +311,11 @@ static BlockStats *bdrv_query_stats(const BlockDriverState *bs)
s->device = g_strdup(bdrv_get_device_name(bs));
}
if (bdrv_get_node_name(bs)[0]) {
s->has_node_name = true;
s->node_name = g_strdup(bdrv_get_node_name(bs));
}
s->stats = g_malloc0(sizeof(*s->stats));
s->stats->rd_bytes = bs->stats.nr_bytes[BLOCK_ACCT_READ];
s->stats->wr_bytes = bs->stats.nr_bytes[BLOCK_ACCT_WRITE];

5
qapi/block-core.json
View file

@ -405,6 +405,8 @@
# @device: #optional If the stats are for a virtual block device, the name
# corresponding to the virtual block device.
#
# @device: #optional The node name of the device. (Since 2.3)
#
# @stats: A @BlockDeviceStats for the device.
#
# @parent: #optional This describes the file block device if it has one.
@ -415,7 +417,8 @@
# Since: 0.14.0
##
{ 'type': 'BlockStats',
'data': {'*device': 'str', 'stats': 'BlockDeviceStats',
'data': {'*device': 'str', '*node-name': 'str',
'stats': 'BlockDeviceStats',
'*parent': 'BlockStats',
'*backing': 'BlockStats'} }