Re: [PATCH] IPROUTE: Modify tc for new PRIO multiqueue behavior

[Stephen Hemminger <shemminger@linux-foundation.org>]

Peter P Waskiewicz Jr wrote:
> From: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
>
> Modified tc so PRIO can now have a multiqueue parameter passed to it.  This
> will turn on multiqueue behavior if a device has more than 1 queue.  Also,
> running tc qdisc ls dev <dev> will display if multiqueue is on or off.
>
> Signed-off-by: Peter P. Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
> ---
>
>  include/linux/pkt_sched.h |    1 +
>  tc/q_prio.c               |    9 ++++++---
>  2 files changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
> index d10f353..bab0b9e 100644
> --- a/include/linux/pkt_sched.h
> +++ b/include/linux/pkt_sched.h
> @@ -99,6 +99,7 @@ struct tc_prio_qopt
>  {
>  	int	bands;			/* Number of bands */
>  	__u8	priomap[TC_PRIO_MAX+1];	/* Map: logical priority -> PRIO band */
> +	unsigned short multiqueue;	/* 0 for no mq, 1 for mq */
>  };
>  
>  /* TBF section */
> diff --git a/tc/q_prio.c b/tc/q_prio.c
> index d696e1b..55cb207 100644
> --- a/tc/q_prio.c
> +++ b/tc/q_prio.c
> @@ -29,7 +29,7 @@
>  
>  static void explain(void)
>  {
> -	fprintf(stderr, "Usage: ... prio bands NUMBER priomap P1 P2...\n");
> +	fprintf(stderr, "Usage: ... prio [multiqueue] bands NUMBER priomap P1 P2...\n");
>  }
>  
>  #define usage() return(-1)
> @@ -39,7 +39,7 @@ static int prio_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct n
>  	int ok=0;
>  	int pmap_mode = 0;
>  	int idx = 0;
> -	struct tc_prio_qopt opt={3,{ 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 }};
> +	struct tc_prio_qopt opt={3,{ 1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 },0};
>  
>  	while (argc > 0) {
>  		if (strcmp(*argv, "bands") == 0) {
> @@ -57,7 +57,9 @@ static int prio_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct n
>  				return -1;
>  			}
>  			pmap_mode = 1;
> -		} else if (strcmp(*argv, "help") == 0) {
> +		} else if (strcmp(*argv, "multiqueue") == 0)
> +			opt.multiqueue = 1;
> +		else if (strcmp(*argv, "help") == 0) {
>  			explain();
>  			return -1;
>  		} else {
> @@ -105,6 +107,7 @@ int prio_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
>  	if (RTA_PAYLOAD(opt)  < sizeof(*qopt))
>  		return -1;
>  	qopt = RTA_DATA(opt);
> +	fprintf(f, "multiqueue %s  ", qopt->multiqueue ? "on" : "off");
>  	fprintf(f, "bands %u priomap ", qopt->bands);
>  	for (i=0; i<=TC_PRIO_MAX; i++)
>  		fprintf(f, " %d", qopt->priomap[i]);
>
>   
Only if this binary compatiable with older kernels.
-
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