#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/pkt_sched.h>
+#include <net/red.h>
#if 1 /* control */
#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
struct gred_sched_data
{
-/* Parameters */
u32 limit; /* HARD maximal queue length */
- u32 qth_min; /* Min average length threshold: A scaled */
- u32 qth_max; /* Max average length threshold: A scaled */
u32 DP; /* the drop pramaters */
- char Wlog; /* log(W) */
- char Plog; /* random number bits */
- u32 Scell_max;
- u32 Rmask;
u32 bytesin; /* bytes seen on virtualQ so far*/
u32 packetsin; /* packets seen on virtualQ so far*/
u32 backlog; /* bytes on the virtualQ */
- u32 forced; /* packets dropped for exceeding limits */
- u32 early; /* packets dropped as a warning */
- u32 other; /* packets dropped by invoking drop() */
- u32 pdrop; /* packets dropped because we exceeded physical queue limits */
- char Scell_log;
- u8 Stab[256];
u8 prio; /* the prio of this vq */
-/* Variables */
- unsigned long qave; /* Average queue length: A scaled */
- int qcount; /* Packets since last random number generation */
- u32 qR; /* Cached random number */
-
- psched_time_t qidlestart; /* Start of idle period */
+ struct red_parms parms;
+ struct red_stats stats;
};
enum {
return 0;
}
+static inline unsigned int gred_backlog(struct gred_sched *table,
+ struct gred_sched_data *q,
+ struct Qdisc *sch)
+{
+ if (gred_wred_mode(table))
+ return sch->qstats.backlog;
+ else
+ return q->backlog;
+}
+
static int
gred_enqueue(struct sk_buff *skb, struct Qdisc* sch)
{
- psched_time_t now;
struct gred_sched_data *q=NULL;
struct gred_sched *t= qdisc_priv(sch);
- unsigned long qave=0;
+ unsigned long qavg = 0;
int i=0;
if (!t->initd && skb_queue_len(&sch->q) < (sch->dev->tx_queue_len ? : 1)) {
if ((!t->tab[i]) || (i==q->DP))
continue;
- if ((t->tab[i]->prio < q->prio) && (PSCHED_IS_PASTPERFECT(t->tab[i]->qidlestart)))
- qave +=t->tab[i]->qave;
+ if (t->tab[i]->prio < q->prio &&
+ !red_is_idling(&t->tab[i]->parms))
+ qavg +=t->tab[i]->parms.qavg;
}
}
q->bytesin+=skb->len;
if (gred_wred_mode(t)) {
- qave=0;
- q->qave=t->tab[t->def]->qave;
- q->qidlestart=t->tab[t->def]->qidlestart;
+ qavg = 0;
+ q->parms.qavg = t->tab[t->def]->parms.qavg;
+ q->parms.qidlestart = t->tab[t->def]->parms.qidlestart;
}
- if (!PSCHED_IS_PASTPERFECT(q->qidlestart)) {
- long us_idle;
- PSCHED_GET_TIME(now);
- us_idle = PSCHED_TDIFF_SAFE(now, q->qidlestart, q->Scell_max);
- PSCHED_SET_PASTPERFECT(q->qidlestart);
+ q->parms.qavg = red_calc_qavg(&q->parms, gred_backlog(t, q, sch));
- q->qave >>= q->Stab[(us_idle>>q->Scell_log)&0xFF];
- } else {
- if (gred_wred_mode(t)) {
- q->qave += sch->qstats.backlog - (q->qave >> q->Wlog);
- } else {
- q->qave += q->backlog - (q->qave >> q->Wlog);
- }
-
- }
-
+ if (red_is_idling(&q->parms))
+ red_end_of_idle_period(&q->parms);
if (gred_wred_mode(t))
- t->tab[t->def]->qave=q->qave;
+ t->tab[t->def]->parms.qavg = q->parms.qavg;
- if ((q->qave+qave) < q->qth_min) {
- q->qcount = -1;
-enqueue:
- if (q->backlog + skb->len <= q->limit) {
- q->backlog += skb->len;
-do_enqueue:
- __skb_queue_tail(&sch->q, skb);
- sch->qstats.backlog += skb->len;
- sch->bstats.bytes += skb->len;
- sch->bstats.packets++;
- return 0;
- } else {
- q->pdrop++;
- }
+ switch (red_action(&q->parms, q->parms.qavg + qavg)) {
+ case RED_DONT_MARK:
+ break;
-drop:
- kfree_skb(skb);
- sch->qstats.drops++;
- return NET_XMIT_DROP;
- }
- if ((q->qave+qave) >= q->qth_max) {
- q->qcount = -1;
- sch->qstats.overlimits++;
- q->forced++;
- goto drop;
+ case RED_PROB_MARK:
+ sch->qstats.overlimits++;
+ q->stats.prob_drop++;
+ goto drop;
+
+ case RED_HARD_MARK:
+ sch->qstats.overlimits++;
+ q->stats.forced_drop++;
+ goto drop;
}
- if (++q->qcount) {
- if ((((qave+q->qave) - q->qth_min)>>q->Wlog)*q->qcount < q->qR)
- goto enqueue;
- q->qcount = 0;
- q->qR = net_random()&q->Rmask;
- sch->qstats.overlimits++;
- q->early++;
- goto drop;
+
+ if (q->backlog + skb->len <= q->limit) {
+ q->backlog += skb->len;
+do_enqueue:
+ __skb_queue_tail(&sch->q, skb);
+ sch->qstats.backlog += skb->len;
+ sch->bstats.bytes += skb->len;
+ sch->bstats.packets++;
+ return 0;
}
- q->qR = net_random()&q->Rmask;
- goto enqueue;
+
+ q->stats.pdrop++;
+drop:
+ kfree_skb(skb);
+ sch->qstats.drops++;
+ return NET_XMIT_DROP;
}
static int
struct gred_sched *t= qdisc_priv(sch);
q= t->tab[(skb->tc_index&0xf)];
/* error checking here -- probably unnecessary */
- PSCHED_SET_PASTPERFECT(q->qidlestart);
+
+ if (red_is_idling(&q->parms))
+ red_end_of_idle_period(&q->parms);
__skb_queue_head(&sch->q, skb);
sch->qstats.backlog += skb->len;
if (q) {
q->backlog -= skb->len;
if (!q->backlog && !gred_wred_mode(t))
- PSCHED_GET_TIME(q->qidlestart);
+ red_start_of_idle_period(&q->parms);
} else {
D2PRINTK("gred_dequeue: skb has bad tcindex %x\n",skb->tc_index&0xf);
}
D2PRINTK("no default VQ set: Results will be "
"screwed up\n");
else
- PSCHED_GET_TIME(q->qidlestart);
+ red_start_of_idle_period(&q->parms);
}
return NULL;
q= t->tab[(skb->tc_index&0xf)];
if (q) {
q->backlog -= len;
- q->other++;
+ q->stats.other++;
if (!q->backlog && !gred_wred_mode(t))
- PSCHED_GET_TIME(q->qidlestart);
+ red_start_of_idle_period(&q->parms);
} else {
D2PRINTK("gred_dequeue: skb has bad tcindex %x\n",skb->tc_index&0xf);
}
return 0;
}
- PSCHED_GET_TIME(q->qidlestart);
+ red_start_of_idle_period(&q->parms);
return 0;
}
q= t->tab[i];
if (!q)
continue;
- PSCHED_SET_PASTPERFECT(q->qidlestart);
- q->qave = 0;
- q->qcount = -1;
+ red_restart(&q->parms);
q->backlog = 0;
- q->other=0;
- q->forced=0;
- q->pdrop=0;
- q->early=0;
+ q->stats.other = 0;
+ q->stats.forced_drop = 0;
+ q->stats.prob_drop = 0;
+ q->stats.pdrop = 0;
}
}
q = table->tab[dp];
q->DP = dp;
q->prio = prio;
-
- q->Wlog = ctl->Wlog;
- q->Plog = ctl->Plog;
q->limit = ctl->limit;
- q->Scell_log = ctl->Scell_log;
- q->Rmask = ctl->Plog < 32 ? ((1<<ctl->Plog) - 1) : ~0UL;
- q->Scell_max = (255<<q->Scell_log);
- q->qth_min = ctl->qth_min<<ctl->Wlog;
- q->qth_max = ctl->qth_max<<ctl->Wlog;
- q->qave=0;
- q->backlog=0;
- q->qcount = -1;
- q->other=0;
- q->forced=0;
- q->pdrop=0;
- q->early=0;
-
- PSCHED_SET_PASTPERFECT(q->qidlestart);
- memcpy(q->Stab, stab, 256);
+
+ if (q->backlog == 0)
+ red_end_of_idle_period(&q->parms);
+
+ red_set_parms(&q->parms,
+ ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Plog,
+ ctl->Scell_log, stab);
+
+ q->stats.other = 0;
+ q->stats.forced_drop = 0;
+ q->stats.prob_drop = 0;
+ q->stats.pdrop = 0;
return 0;
}
opt.DP = q->DP;
opt.backlog = q->backlog;
opt.prio = q->prio;
- opt.qth_min = q->qth_min >> q->Wlog;
- opt.qth_max = q->qth_max >> q->Wlog;
- opt.Wlog = q->Wlog;
- opt.Plog = q->Plog;
- opt.Scell_log = q->Scell_log;
- opt.other = q->other;
- opt.early = q->early;
- opt.forced = q->forced;
- opt.pdrop = q->pdrop;
+ opt.qth_min = q->parms.qth_min >> q->parms.Wlog;
+ opt.qth_max = q->parms.qth_max >> q->parms.Wlog;
+ opt.Wlog = q->parms.Wlog;
+ opt.Plog = q->parms.Plog;
+ opt.Scell_log = q->parms.Scell_log;
+ opt.other = q->stats.other;
+ opt.early = q->stats.prob_drop;
+ opt.forced = q->stats.forced_drop;
+ opt.pdrop = q->stats.pdrop;
opt.packets = q->packetsin;
opt.bytesin = q->bytesin;
- if (q->qave) {
- if (gred_wred_mode(table)) {
- q->qidlestart=table->tab[table->def]->qidlestart;
- q->qave=table->tab[table->def]->qave;
- }
- if (!PSCHED_IS_PASTPERFECT(q->qidlestart)) {
- long idle;
- unsigned long qave;
- psched_time_t now;
- PSCHED_GET_TIME(now);
- idle = PSCHED_TDIFF_SAFE(now, q->qidlestart, q->Scell_max);
- qave = q->qave >> q->Stab[(idle>>q->Scell_log)&0xFF];
- opt.qave = qave >> q->Wlog;
-
- } else {
- opt.qave = q->qave >> q->Wlog;
- }
+ if (gred_wred_mode(table)) {
+ q->parms.qidlestart =
+ table->tab[table->def]->parms.qidlestart;
+ q->parms.qavg = table->tab[table->def]->parms.qavg;
}
+ opt.qave = red_calc_qavg(&q->parms, q->parms.qavg);
+
append_opt:
RTA_APPEND(skb, sizeof(opt), &opt);
}
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