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hmp/qmp: add block_set_io_throttle

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Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Zhi Yong Wu 2011-11-08 13:00:31 +08:00 • committed by Kevin Wolf
parent 98f90dba5e
commit 727f005e6a
9 changed files with 175 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

59
blockdev.c
View file

@ -759,6 +759,65 @@ int do_change_block(Monitor *mon, const char *device,
return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);
}
/* throttling disk I/O limits */
int do_block_set_io_throttle(Monitor *mon,
const QDict *qdict, QObject **ret_data)
{
BlockIOLimit io_limits;
const char *devname = qdict_get_str(qdict, "device");
BlockDriverState *bs;
io_limits.bps[BLOCK_IO_LIMIT_TOTAL]
= qdict_get_try_int(qdict, "bps", -1);
io_limits.bps[BLOCK_IO_LIMIT_READ]
= qdict_get_try_int(qdict, "bps_rd", -1);
io_limits.bps[BLOCK_IO_LIMIT_WRITE]
= qdict_get_try_int(qdict, "bps_wr", -1);
io_limits.iops[BLOCK_IO_LIMIT_TOTAL]
= qdict_get_try_int(qdict, "iops", -1);
io_limits.iops[BLOCK_IO_LIMIT_READ]
= qdict_get_try_int(qdict, "iops_rd", -1);
io_limits.iops[BLOCK_IO_LIMIT_WRITE]
= qdict_get_try_int(qdict, "iops_wr", -1);
bs = bdrv_find(devname);
if (!bs) {
qerror_report(QERR_DEVICE_NOT_FOUND, devname);
return -1;
}
if ((io_limits.bps[BLOCK_IO_LIMIT_TOTAL] == -1)
|| (io_limits.bps[BLOCK_IO_LIMIT_READ] == -1)
|| (io_limits.bps[BLOCK_IO_LIMIT_WRITE] == -1)
|| (io_limits.iops[BLOCK_IO_LIMIT_TOTAL] == -1)
|| (io_limits.iops[BLOCK_IO_LIMIT_READ] == -1)
|| (io_limits.iops[BLOCK_IO_LIMIT_WRITE] == -1)) {
qerror_report(QERR_MISSING_PARAMETER,
"bps/bps_rd/bps_wr/iops/iops_rd/iops_wr");
return -1;
}
if (!do_check_io_limits(&io_limits)) {
qerror_report(QERR_INVALID_PARAMETER_COMBINATION);
return -1;
}
bs->io_limits = io_limits;
bs->slice_time = BLOCK_IO_SLICE_TIME;
if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
bdrv_io_limits_enable(bs);
} else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
bdrv_io_limits_disable(bs);
} else {
if (bs->block_timer) {
qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock));
}
}
return 0;
}
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
const char *id = qdict_get_str(qdict, "id");