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block: Accept device model name for block_set_io_throttle 

In order to remove the need for BlockBackend names in the external API,
we want to allow qdev device names in all device related commands.

This converts block_set_io_throttle to accept a qdev device name.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2016-09-20 13:38:48 +02:00
parent 70e2cb3bd7
commit 7a9877a026
3 changed files with 16 additions and 10 deletions
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12
blockdev.c
View File

@ -2647,10 +2647,10 @@ void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
BlockBackend *blk;
AioContext *aio_context;
blk = blk_by_name(arg->device);
blk = qmp_get_blk(arg->has_device ? arg->device : NULL,
arg->has_id ? arg->id : NULL,
errp);
if (!blk) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
"Device '%s' not found", arg->device);
return;
}
@ -2659,7 +2659,7 @@ void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
bs = blk_bs(blk);
if (!bs) {
error_setg(errp, "Device '%s' has no medium", arg->device);
error_setg(errp, "Device has no medium");
goto out;
}
@ -2723,7 +2723,9 @@ void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
* just update the throttling group. */
if (!blk_get_public(blk)->throttle_state) {
blk_io_limits_enable(blk,
arg->has_group ? arg->group : arg->device);
arg->has_group ? arg->group :
arg->has_device ? arg->device :
arg->id);
} else if (arg->has_group) {
blk_io_limits_update_group(blk, arg->group);
}

6
docs/qmp-commands.txt
View File

@ -1459,7 +1459,9 @@ Change I/O throttle limits for a block drive.
Arguments:
- "device": device name (json-string)
- "device": block device name (deprecated, use @id instead)
(json-string, optional)
- "id": the name or QOM path of the guest device (json-string, optional)
- "bps": total throughput limit in bytes per second (json-int)
- "bps_rd": read throughput limit in bytes per second (json-int)
- "bps_wr": write throughput limit in bytes per second (json-int)
@ -1483,7 +1485,7 @@ Arguments:
Example:
-> { "execute": "block_set_io_throttle", "arguments": { "device": "virtio0",
-> { "execute": "block_set_io_throttle", "arguments": { "id": "ide0-1-0",
"bps": 1000000,
"bps_rd": 0,
"bps_wr": 0,

8
qapi/block-core.json
View File

@ -1377,7 +1377,9 @@
#
# A set of parameters describing block throttling.
#
# @device: The name of the device
# @device: #optional Block device name (deprecated, use @id instead)
#
# @id: #optional The name or QOM path of the guest device (since: 2.8)
#
# @bps: total throughput limit in bytes per second
#
@ -1446,8 +1448,8 @@
# Since: 1.1
##
{ 'struct': 'BlockIOThrottle',
'data': { 'device': 'str', 'bps': 'int', 'bps_rd': 'int', 'bps_wr': 'int',
'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
'data': { '*device': 'str', '*id': 'str', 'bps': 'int', 'bps_rd': 'int',
'bps_wr': 'int', 'iops': 'int', 'iops_rd': 'int', 'iops_wr': 'int',
'*bps_max': 'int', '*bps_rd_max': 'int',
'*bps_wr_max': 'int', '*iops_max': 'int',
'*iops_rd_max': 'int', '*iops_wr_max': 'int',