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block: Use bdrv_get_backing_file_depth()

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Use the dedicated counting function in qmp_query_block in order to
propagate the backing file depth to HMP and add backing_file_depth
to qmp-commands.hx

Signed-off-by: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Benoît Canet 2012-08-02 10:22:48 +02:00 committed by Luiz Capitulino
parent f198fd1c9a
commit 2e3e331710
3 changed files with 11 additions and 3 deletions
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3
block.c
View File

@ -2450,6 +2450,9 @@ BlockInfoList *qmp_query_block(Error **errp)
info->value->inserted->backing_file = g_strdup(bs->backing_file);
}
info->value->inserted->backing_file_depth =
bdrv_get_backing_file_depth(bs);
if (bs->io_limits_enabled) {
info->value->inserted->bps =
bs->io_limits.bps[BLOCK_IO_LIMIT_TOTAL];

9
qapi-schema.json
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@ -398,6 +398,8 @@
#
# @backing_file: #optional the name of the backing file (for copy-on-write)
#
# @backing_file_depth: number of files in the backing file chain (since: 1.2)
#
# @encrypted: true if the backing device is encrypted
#
# @bps: total throughput limit in bytes per second is specified
@ -418,9 +420,10 @@
##
{ 'type': 'BlockDeviceInfo',
'data': { 'file': 'str', 'ro': 'bool', 'drv': 'str',
'*backing_file': 'str', 'encrypted': 'bool',
'bps': 'int', 'bps_rd': 'int', 'bps_wr': 'int',
'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int'} }
'*backing_file': 'str', 'backing_file_depth': 'int',
'encrypted': 'bool', 'bps': 'int', 'bps_rd': 'int',
'bps_wr': 'int', 'iops': 'int', 'iops_rd': 'int',
'iops_wr': 'int'} }
##
# @BlockDeviceIoStatus:

2
qmp-commands.hx
View File

@ -1317,6 +1317,7 @@ Each json-object contain the following:
"nbd", "parallels", "qcow", "qcow2", "raw",
"tftp", "vdi", "vmdk", "vpc", "vvfat"
- "backing_file": backing file name (json-string, optional)
- "backing_file_depth": number of files in the backing file chain (json-int)
- "encrypted": true if encrypted, false otherwise (json-bool)
- "bps": limit total bytes per second (json-int)
- "bps_rd": limit read bytes per second (json-int)
@ -1345,6 +1346,7 @@ Example:
"drv":"qcow2",
"encrypted":false,
"file":"disks/test.img",
"backing_file_depth":0,
"bps":1000000,
"bps_rd":0,
"bps_wr":0,