Commit b00355db authored by Jarek Poplawski's avatar Jarek Poplawski Committed by David S. Miller
Browse files

pkt_sched: sch_hfsc: sch_htb: Add non-work-conserving warning handler. 



Patrick McHardy <kaber@trash.net> suggested:
> How about making this flag and the warning message (in a out-of-line
> function) globally available? Other qdiscs (f.i. HFSC) can't deal with
> inner non-work-conserving qdiscs as well.

This patch uses qdisc->flags field of "suspected" child qdisc.

Signed-off-by: default avatarJarek Poplawski <jarkao2@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eefef1cf

include/net/pkt_sched.h

+1 −0
Original line number Diff line number Diff line
@@ -85,6 +85,7 @@ extern struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, 
		struct nlattr *tab);

extern void qdisc_put_rtab(struct qdisc_rate_table *tab);

extern void qdisc_put_stab(struct qdisc_size_table *tab);

extern void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc);



extern void __qdisc_run(struct Qdisc *q);

include/net/sch_generic.h

+4 −3
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ struct Qdisc 
#define TCQ_F_BUILTIN		1

#define TCQ_F_THROTTLED		2

#define TCQ_F_INGRESS		4

#define TCQ_F_WARN_NONWC	(1 << 16)

	int			padded;

	struct Qdisc_ops	*ops;

	struct qdisc_size_table	*stab;

net/sched/sch_api.c

+11 −0
Original line number Diff line number Diff line
@@ -444,6 +444,17 @@ out: 
}

EXPORT_SYMBOL(qdisc_calculate_pkt_len);



void qdisc_warn_nonwc(char *txt, struct Qdisc *qdisc)

{

	if (!(qdisc->flags & TCQ_F_WARN_NONWC)) {

		printk(KERN_WARNING

		       "%s: %s qdisc %X: is non-work-conserving?\n",

		       txt, qdisc->ops->id, qdisc->handle >> 16);

		qdisc->flags |= TCQ_F_WARN_NONWC;

	}

}

EXPORT_SYMBOL(qdisc_warn_nonwc);



static enum hrtimer_restart qdisc_watchdog(struct hrtimer *timer)

{

	struct qdisc_watchdog *wd = container_of(timer, struct qdisc_watchdog,

net/sched/sch_hfsc.c

+2 −4
Original line number Diff line number Diff line
@@ -887,8 +887,7 @@ qdisc_peek_len(struct Qdisc *sch) 


	skb = sch->ops->peek(sch);

	if (skb == NULL) {

		if (net_ratelimit())

			printk("qdisc_peek_len: non work-conserving qdisc ?\n");

		qdisc_warn_nonwc("qdisc_peek_len", sch);

		return 0;

	}

	len = qdisc_pkt_len(skb);
@@ -1642,8 +1641,7 @@ hfsc_dequeue(struct Qdisc *sch) 


	skb = qdisc_dequeue_peeked(cl->qdisc);

	if (skb == NULL) {

		if (net_ratelimit())

			printk("HFSC: Non-work-conserving qdisc ?\n");

		qdisc_warn_nonwc("HFSC", cl->qdisc);

		return NULL;

	}

net/sched/sch_htb.c

+1 −8
Original line number Diff line number Diff line
@@ -114,8 +114,6 @@ struct htb_class { 
	struct tcf_proto *filter_list;

	int filter_cnt;



	int warned;		/* only one warning about non work conserving .. */



	/* token bucket parameters */

	struct qdisc_rate_table *rate;	/* rate table of the class itself */

	struct qdisc_rate_table *ceil;	/* ceiling rate (limits borrows too) */
@@ -809,13 +807,8 @@ next: 
		skb = cl->un.leaf.q->dequeue(cl->un.leaf.q);

		if (likely(skb != NULL))

			break;

		if (!cl->warned) {

			printk(KERN_WARNING

			       "htb: class %X isn't work conserving ?!\n",

			       cl->common.classid);

			cl->warned = 1;

		}



		qdisc_warn_nonwc("htb", cl->un.leaf.q);

		htb_next_rb_node((level ? cl->parent->un.inner.ptr : q->

				  ptr[0]) + prio);

		cl = htb_lookup_leaf(q->row[level] + prio, prio,

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