On Thu, Oct 27, 2011 at 05:20:09PM +0800, Lei HH Li wrote:
>
> Signed-off-by: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Lei Li <lilei@xxxxxxxxxxxxxxxxxx>
> ---
> tools/virsh.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> tools/virsh.pod | 13 +++++++
> 2 files changed, 112 insertions(+), 0 deletions(-)
>
> diff --git a/tools/virsh.c b/tools/virsh.c
> index 72344f0..de86c40 100644
> --- a/tools/virsh.c
> +++ b/tools/virsh.c
> @@ -6023,6 +6023,104 @@ cmdBlockJob(vshControl *ctl, const vshCmd *cmd)
> return true;
> }
>
> +/*
> + * "blkiothrottle" command
> + */
> +static const vshCmdInfo info_blkiothrottle[] = {
> + {"help", N_("Set or display a block disk I/O throttle setting.")},
> + {"desc", N_("Set or display a block disk I/O throttle setting.")},
> + {NULL, NULL}
> +};
> +
> +static const vshCmdOptDef opts_blkiothrottle[] = {
> + {"domain", VSH_OT_DATA, VSH_OFLAG_REQ, N_("domain name, id or uuid")},
> + {"device", VSH_OT_DATA, VSH_OFLAG_REQ, N_("block device")},
> + {"bps", VSH_OT_INT, VSH_OFLAG_NONE, N_("total throughput limits in bytes/s")},
> + {"bps_rd", VSH_OT_INT, VSH_OFLAG_NONE, N_("read throughput limits in bytes/s")},
> + {"bps_wr", VSH_OT_INT, VSH_OFLAG_NONE, N_("write throughput limits in bytes/s")},
> + {"iops", VSH_OT_INT, VSH_OFLAG_NONE, N_("total operation limits in numbers/s")},
> + {"iops_rd", VSH_OT_INT, VSH_OFLAG_NONE, N_("read operation limits in numbers/s")},
> + {"iops_wr", VSH_OT_INT, VSH_OFLAG_NONE, N_("write operation limits in numbers/s")},
> + {NULL, 0, 0, NULL}
> +};
> +
> +static bool
> +cmdBlkIoThrottle(vshControl *ctl, const vshCmd *cmd)
> +{
> + virDomainPtr dom = NULL;
> + const char *name, *disk;
> + virDomainBlockIoThrottleInfo info;
> + virDomainBlockIoThrottleInfo reply;
> + unsigned int flags = 0;
> + int ret = -1;
> +
> + memset(&info, 0, sizeof(info));
> +
> + if (!vshConnectionUsability(ctl, ctl->conn))
> + goto out;
> +
> + if (!(dom = vshCommandOptDomain(ctl, cmd, &name)))
> + goto out;
> +
> + if (vshCommandOptString(cmd, "device", &disk) < 0)
> + goto out;
> +
> + if (vshCommandOptULongLong(cmd, "bps", &info.bps) < 0) {
> + info.bps = 0;
> + }
> +
> + if (vshCommandOptULongLong(cmd, "bps_rd", &info.bps_rd) < 0) {
> + info.bps_rd = 0;
> + }
> +
> + if (vshCommandOptULongLong(cmd, "bps_wr", &info.bps_wr) < 0) {
> + info.bps_wr = 0;
> + }
> +
> + if (vshCommandOptULongLong(cmd, "iops", &info.iops) < 0) {
> + info.iops = 0;
> + }
> +
> + if (vshCommandOptULongLong(cmd, "iops_rd", &info.iops_rd) < 0) {
> + info.iops_wr = 0;
> + }
> +
> + if (vshCommandOptULongLong(cmd, "iops_wr", &info.iops_wr) < 0) {
> + info.bps_wr = 0;
> + }
> +
> + if ((info.bps == 0) && (info.bps_rd == 0) && (info.bps_wr == 0)
> + && (info.iops == 0) && (info.iops_rd == 0) && (info.iops_wr == 0)) {
What if I want to set one of these values to zero (ie. erase a current limit)?
Won't this mistakenly just print out the current settings? I think you'll need
a bit more sophistication here.
> +
> + ret = virDomainGetBlockIoThrottle(dom, disk, &reply, flags);
> +
> + if (ret != 0)
> + goto out;
> +
> + vshPrint(ctl, "%-15s %llu\n", _("bps:"), reply.bps);
> + vshPrint(ctl, "%-15s %llu\n", _("bps_rd:"), reply.bps_rd);
> + vshPrint(ctl, "%-15s %llu\n", _("bps_wr:"), reply.bps_wr);
> + vshPrint(ctl, "%-15s %llu\n", _("iops:"), reply.iops);
> + vshPrint(ctl, "%-15s %llu\n", _("iops_rd:"), reply.iops_rd);
> + vshPrint(ctl, "%-15s %llu\n", _("iops_wr:"), reply.iops_wr);
> +
> + virDomainFree(dom);
> + return true;
> + } else {
> + flags = 1;
> +
> + ret = virDomainSetBlockIoThrottle(dom, disk, &info, flags);
> +
> + if (ret == 0) {
> + virDomainFree(dom);
> + return true;
> + }
> + }
> +
> +out:
> + virDomainFree(dom);
> + return false;
> +}
>
> /*
> * "net-autostart" command
> @@ -14017,6 +14115,7 @@ static const vshCmdDef domManagementCmds[] = {
> {"blkiotune", cmdBlkiotune, opts_blkiotune, info_blkiotune, 0},
> {"blockpull", cmdBlockPull, opts_block_pull, info_block_pull, 0},
> {"blockjob", cmdBlockJob, opts_block_job, info_block_job, 0},
> + {"blkiothrottle", cmdBlkIoThrottle, opts_blkiothrottle, info_blkiothrottle, 0},
> #ifndef WIN32
> {"console", cmdConsole, opts_console, info_console, 0},
> #endif
> diff --git a/tools/virsh.pod b/tools/virsh.pod
> index 775d302..61ec613 100644
> --- a/tools/virsh.pod
> +++ b/tools/virsh.pod
> @@ -572,6 +572,19 @@ operation can be checked with B<blockjob>.
> I<path> specifies fully-qualified path of the disk.
> I<bandwidth> specifies copying bandwidth limit in Mbps.
>
> +=item B<blkiothrottle> I<domain> I<device> [[I<--bps> B<bps>] | [[I<--bps_rd> B<bps_rd>] [I<--bps_wr> B<bps_wr>]] [[I<--iops> B<iops>] | [[I<--iops_rd> B<iops_rd>] [I<--iops_wr> B<iops_wr>]]
> +
> +Set or display the block disk io limits settting.
> +I<path> specifies block disk name.
> +I<--bps> specifies total throughput limit in bytes/s.
> +I<--bps_rd> specifies read throughput limit in bytes/s.
> +I<--bps_wr> specifies write throughput limit in bytes/s.
> +I<--iops> specifies total operation limit in numbers/s.
> +I<--iops_rd> specifies read operation limit in numbers/s.
> +I<--iops_wr> specifies write operation limit in numbers/s.
> +
> +If no limit is specified, it will query current I/O limits setting.
> +
> =item B<blockjob> I<domain> I<path> [I<--abort>] [I<--info>] [I<bandwidth>]
>
> Manage active block operations.
> --
> 1.7.1
>
--
Adam Litke <agl@xxxxxxxxxx>
IBM Linux Technology Center
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