diff options
Diffstat (limited to 'blockdev.c')
| -rw-r--r-- | blockdev.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c index bbe5f11be7..9068c5b1d0 100644 --- a/blockdev.c +++ b/blockdev.c @@ -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"); |