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block/qapi: Add 'qdev' field to query-blockstats result 

Like for query-block, the client needs to identify which BlockBackend
the returned data is for. Anonymous BlockBackends are identified by the
device model they are attached to. Add a 'qdev' field that contains the
qdev ID or QOM path of the attached device model.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2018-07-27 16:07:07 +02:00
parent 34fa110e42
commit 5a9cb5a97f
2 changed files with 20 additions and 4 deletions
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10
block/qapi.c
View File

@ -597,11 +597,21 @@ BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
BlockStatsList *info = g_malloc0(sizeof(*info));
AioContext *ctx = blk_get_aio_context(blk);
BlockStats *s;
char *qdev;
aio_context_acquire(ctx);
s = bdrv_query_bds_stats(blk_bs(blk), true);
s->has_device = true;
s->device = g_strdup(blk_name(blk));
qdev = blk_get_attached_dev_id(blk);
if (qdev && *qdev) {
s->has_qdev = true;
s->qdev = qdev;
} else {
g_free(qdev);
}
bdrv_query_blk_stats(s->stats, blk);
aio_context_release(ctx);

14
qapi/block-core.json
View File

@ -866,6 +866,9 @@
#
# @node-name: The node name of the device. (Since 2.3)
#
# @qdev: The qdev ID, or if no ID is assigned, the QOM path of the block
# device. (since 3.0)
#
# @stats: A @BlockDeviceStats for the device.
#
# @parent: This describes the file block device if it has one.
@ -879,7 +882,7 @@
# Since: 0.14.0
##
{ 'struct': 'BlockStats',
'data': {'*device': 'str', '*node-name': 'str',
'data': {'*device': 'str', '*qdev': 'str', '*node-name': 'str',
'stats': 'BlockDeviceStats',
'*parent': 'BlockStats',
'*backing': 'BlockStats'} }
@ -941,7 +944,8 @@
# "idle_time_ns":2953431879,
# "account_invalid":true,
# "account_failed":false
# }
# },
# "qdev": "/machine/unattached/device[23]"
# },
# {
# "device":"ide1-cd0",
@ -959,7 +963,8 @@
# "wr_merged":0,
# "account_invalid":false,
# "account_failed":false
# }
# },
# "qdev": "/machine/unattached/device[24]"
# },
# {
# "device":"floppy0",
@ -977,7 +982,8 @@
# "wr_merged":0,
# "account_invalid":false,
# "account_failed":false
# }
# },
# "qdev": "/machine/unattached/device[16]"
# },
# {
# "device":"sd0",