Lines Matching refs:q
210 static bool loss_4state(struct netem_sched_data *q) in loss_4state() argument
212 struct clgstate *clg = &q->clg; in loss_4state()
213 u32 rnd = prandom_u32_state(&q->prng.prng_state); in loss_4state()
275 static bool loss_gilb_ell(struct netem_sched_data *q) in loss_gilb_ell() argument
277 struct clgstate *clg = &q->clg; in loss_gilb_ell()
278 struct rnd_state *s = &q->prng.prng_state; in loss_gilb_ell()
297 static bool loss_event(struct netem_sched_data *q) in loss_event() argument
299 switch (q->loss_model) { in loss_event()
302 return q->loss && q->loss >= get_crandom(&q->loss_cor, &q->prng); in loss_event()
310 return loss_4state(q); in loss_event()
318 return loss_gilb_ell(q); in loss_event()
357 static u64 packet_time_ns(u64 len, const struct netem_sched_data *q) in packet_time_ns() argument
359 len += q->packet_overhead; in packet_time_ns()
361 if (q->cell_size) { in packet_time_ns()
362 u32 cells = reciprocal_divide(len, q->cell_size_reciprocal); in packet_time_ns()
364 if (len > cells * q->cell_size) /* extra cell needed for remainder */ in packet_time_ns()
366 len = cells * (q->cell_size + q->cell_overhead); in packet_time_ns()
369 return div64_u64(len * NSEC_PER_SEC, q->rate); in packet_time_ns()
374 struct netem_sched_data *q = qdisc_priv(sch); in tfifo_reset() local
375 struct rb_node *p = rb_first(&q->t_root); in tfifo_reset()
381 rb_erase(&skb->rbnode, &q->t_root); in tfifo_reset()
385 rtnl_kfree_skbs(q->t_head, q->t_tail); in tfifo_reset()
386 q->t_head = NULL; in tfifo_reset()
387 q->t_tail = NULL; in tfifo_reset()
388 q->t_len = 0; in tfifo_reset()
393 struct netem_sched_data *q = qdisc_priv(sch); in tfifo_enqueue() local
396 if (!q->t_tail || tnext >= netem_skb_cb(q->t_tail)->time_to_send) { in tfifo_enqueue()
397 if (q->t_tail) in tfifo_enqueue()
398 q->t_tail->next = nskb; in tfifo_enqueue()
400 q->t_head = nskb; in tfifo_enqueue()
401 q->t_tail = nskb; in tfifo_enqueue()
403 struct rb_node **p = &q->t_root.rb_node, *parent = NULL; in tfifo_enqueue()
416 rb_insert_color(&nskb->rbnode, &q->t_root); in tfifo_enqueue()
418 q->t_len++; in tfifo_enqueue()
419 sch->q.qlen++; in tfifo_enqueue()
451 struct netem_sched_data *q = qdisc_priv(sch); in netem_enqueue() local
463 if (q->duplicate && q->duplicate >= get_crandom(&q->dup_cor, &q->prng)) in netem_enqueue()
467 if (loss_event(q)) { in netem_enqueue()
468 if (q->ecn && INET_ECN_set_ce(skb)) in netem_enqueue()
482 if (q->latency || q->jitter || q->rate) in netem_enqueue()
498 if (q->corrupt && q->corrupt >= get_crandom(&q->corrupt_cor, &q->prng)) { in netem_enqueue()
525 if (unlikely(q->t_len >= sch->limit)) { in netem_enqueue()
541 u32 dupsave = q->duplicate; /* prevent duplicating a dup... */ in netem_enqueue()
543 q->duplicate = 0; in netem_enqueue()
545 q->duplicate = dupsave; in netem_enqueue()
552 if (q->gap == 0 || /* not doing reordering */ in netem_enqueue()
553 q->counter < q->gap - 1 || /* inside last reordering gap */ in netem_enqueue()
554 q->reorder < get_crandom(&q->reorder_cor, &q->prng)) { in netem_enqueue()
558 delay = tabledist(q->latency, q->jitter, in netem_enqueue()
559 &q->delay_cor, &q->prng, q->delay_dist); in netem_enqueue()
563 if (q->rate) { in netem_enqueue()
566 if (sch->q.tail) in netem_enqueue()
567 last = netem_skb_cb(sch->q.tail); in netem_enqueue()
568 if (q->t_root.rb_node) { in netem_enqueue()
572 t_skb = skb_rb_last(&q->t_root); in netem_enqueue()
578 if (q->t_tail) { in netem_enqueue()
580 netem_skb_cb(q->t_tail); in netem_enqueue()
598 delay += packet_time_ns(qdisc_pkt_len(skb), q); in netem_enqueue()
602 ++q->counter; in netem_enqueue()
610 q->counter = 0; in netem_enqueue()
612 __qdisc_enqueue_head(skb, &sch->q); in netem_enqueue()
654 static void get_slot_next(struct netem_sched_data *q, u64 now) in get_slot_next() argument
658 if (!q->slot_dist) in get_slot_next()
659 next_delay = q->slot_config.min_delay + in get_slot_next()
661 (q->slot_config.max_delay - in get_slot_next()
662 q->slot_config.min_delay) >> 32); in get_slot_next()
664 next_delay = tabledist(q->slot_config.dist_delay, in get_slot_next()
665 (s32)(q->slot_config.dist_jitter), in get_slot_next()
666 NULL, &q->prng, q->slot_dist); in get_slot_next()
668 q->slot.slot_next = now + next_delay; in get_slot_next()
669 q->slot.packets_left = q->slot_config.max_packets; in get_slot_next()
670 q->slot.bytes_left = q->slot_config.max_bytes; in get_slot_next()
673 static struct sk_buff *netem_peek(struct netem_sched_data *q) in netem_peek() argument
675 struct sk_buff *skb = skb_rb_first(&q->t_root); in netem_peek()
679 return q->t_head; in netem_peek()
680 if (!q->t_head) in netem_peek()
684 t2 = netem_skb_cb(q->t_head)->time_to_send; in netem_peek()
687 return q->t_head; in netem_peek()
690 static void netem_erase_head(struct netem_sched_data *q, struct sk_buff *skb) in netem_erase_head() argument
692 if (skb == q->t_head) { in netem_erase_head()
693 q->t_head = skb->next; in netem_erase_head()
694 if (!q->t_head) in netem_erase_head()
695 q->t_tail = NULL; in netem_erase_head()
697 rb_erase(&skb->rbnode, &q->t_root); in netem_erase_head()
703 struct netem_sched_data *q = qdisc_priv(sch); in netem_dequeue() local
707 skb = __qdisc_dequeue_head(&sch->q); in netem_dequeue()
714 skb = netem_peek(q); in netem_dequeue()
721 if (q->slot.slot_next && q->slot.slot_next < time_to_send) in netem_dequeue()
722 get_slot_next(q, now); in netem_dequeue()
724 if (time_to_send <= now && q->slot.slot_next <= now) { in netem_dequeue()
725 netem_erase_head(q, skb); in netem_dequeue()
726 q->t_len--; in netem_dequeue()
734 if (q->slot.slot_next) { in netem_dequeue()
735 q->slot.packets_left--; in netem_dequeue()
736 q->slot.bytes_left -= qdisc_pkt_len(skb); in netem_dequeue()
737 if (q->slot.packets_left <= 0 || in netem_dequeue()
738 q->slot.bytes_left <= 0) in netem_dequeue()
739 get_slot_next(q, now); in netem_dequeue()
742 if (q->qdisc) { in netem_dequeue()
747 err = qdisc_enqueue(skb, q->qdisc, &to_free); in netem_dequeue()
753 sch->q.qlen--; in netem_dequeue()
758 sch->q.qlen--; in netem_dequeue()
762 if (q->qdisc) { in netem_dequeue()
763 skb = q->qdisc->ops->dequeue(q->qdisc); in netem_dequeue()
765 sch->q.qlen--; in netem_dequeue()
770 qdisc_watchdog_schedule_ns(&q->watchdog, in netem_dequeue()
772 q->slot.slot_next)); in netem_dequeue()
775 if (q->qdisc) { in netem_dequeue()
776 skb = q->qdisc->ops->dequeue(q->qdisc); in netem_dequeue()
778 sch->q.qlen--; in netem_dequeue()
787 struct netem_sched_data *q = qdisc_priv(sch); in netem_reset() local
791 if (q->qdisc) in netem_reset()
792 qdisc_reset(q->qdisc); in netem_reset()
793 qdisc_watchdog_cancel(&q->watchdog); in netem_reset()
828 static void get_slot(struct netem_sched_data *q, const struct nlattr *attr) in get_slot() argument
832 q->slot_config = *c; in get_slot()
833 if (q->slot_config.max_packets == 0) in get_slot()
834 q->slot_config.max_packets = INT_MAX; in get_slot()
835 if (q->slot_config.max_bytes == 0) in get_slot()
836 q->slot_config.max_bytes = INT_MAX; in get_slot()
839 q->slot_config.dist_jitter = min_t(__s64, INT_MAX, abs(q->slot_config.dist_jitter)); in get_slot()
841 q->slot.packets_left = q->slot_config.max_packets; in get_slot()
842 q->slot.bytes_left = q->slot_config.max_bytes; in get_slot()
843 if (q->slot_config.min_delay | q->slot_config.max_delay | in get_slot()
844 q->slot_config.dist_jitter) in get_slot()
845 q->slot.slot_next = ktime_get_ns(); in get_slot()
847 q->slot.slot_next = 0; in get_slot()
850 static void get_correlation(struct netem_sched_data *q, const struct nlattr *attr) in get_correlation() argument
854 init_crandom(&q->delay_cor, c->delay_corr); in get_correlation()
855 init_crandom(&q->loss_cor, c->loss_corr); in get_correlation()
856 init_crandom(&q->dup_cor, c->dup_corr); in get_correlation()
859 static void get_reorder(struct netem_sched_data *q, const struct nlattr *attr) in get_reorder() argument
863 q->reorder = r->probability; in get_reorder()
864 init_crandom(&q->reorder_cor, r->correlation); in get_reorder()
867 static void get_corrupt(struct netem_sched_data *q, const struct nlattr *attr) in get_corrupt() argument
871 q->corrupt = r->probability; in get_corrupt()
872 init_crandom(&q->corrupt_cor, r->correlation); in get_corrupt()
875 static void get_rate(struct netem_sched_data *q, const struct nlattr *attr) in get_rate() argument
879 q->rate = r->rate; in get_rate()
880 q->packet_overhead = r->packet_overhead; in get_rate()
881 q->cell_size = r->cell_size; in get_rate()
882 q->cell_overhead = r->cell_overhead; in get_rate()
883 if (q->cell_size) in get_rate()
884 q->cell_size_reciprocal = reciprocal_value(q->cell_size); in get_rate()
886 q->cell_size_reciprocal = (struct reciprocal_value) { 0 }; in get_rate()
889 static int get_loss_clg(struct netem_sched_data *q, const struct nlattr *attr) in get_loss_clg() argument
906 q->loss_model = CLG_4_STATES; in get_loss_clg()
908 q->clg.state = TX_IN_GAP_PERIOD; in get_loss_clg()
909 q->clg.a1 = gi->p13; in get_loss_clg()
910 q->clg.a2 = gi->p31; in get_loss_clg()
911 q->clg.a3 = gi->p32; in get_loss_clg()
912 q->clg.a4 = gi->p14; in get_loss_clg()
913 q->clg.a5 = gi->p23; in get_loss_clg()
925 q->loss_model = CLG_GILB_ELL; in get_loss_clg()
926 q->clg.state = GOOD_STATE; in get_loss_clg()
927 q->clg.a1 = ge->p; in get_loss_clg()
928 q->clg.a2 = ge->r; in get_loss_clg()
929 q->clg.a3 = ge->h; in get_loss_clg()
930 q->clg.a4 = ge->k1; in get_loss_clg()
981 struct Qdisc *root, *q; in check_netem_in_tree() local
995 hash_for_each(qdisc_dev(root)->qdisc_hash, i, q, hash) { in check_netem_in_tree()
996 if (sch != q && q->ops->cl_ops == &netem_class_ops) { in check_netem_in_tree()
998 ((struct netem_sched_data *)qdisc_priv(q))->duplicate) in check_netem_in_tree()
1015 struct netem_sched_data *q = qdisc_priv(sch); in netem_change() local
1043 old_clg = q->clg; in netem_change()
1044 old_loss_model = q->loss_model; in netem_change()
1047 ret = get_loss_clg(q, tb[TCA_NETEM_LOSS]); in netem_change()
1049 q->loss_model = old_loss_model; in netem_change()
1050 q->clg = old_clg; in netem_change()
1054 q->loss_model = CLG_RANDOM; in netem_change()
1058 swap(q->delay_dist, delay_dist); in netem_change()
1060 swap(q->slot_dist, slot_dist); in netem_change()
1063 q->latency = PSCHED_TICKS2NS(qopt->latency); in netem_change()
1064 q->jitter = PSCHED_TICKS2NS(qopt->jitter); in netem_change()
1065 q->limit = qopt->limit; in netem_change()
1066 q->gap = qopt->gap; in netem_change()
1067 q->counter = 0; in netem_change()
1068 q->loss = qopt->loss; in netem_change()
1074 q->duplicate = qopt->duplicate; in netem_change()
1079 if (q->gap) in netem_change()
1080 q->reorder = ~0; in netem_change()
1083 get_correlation(q, tb[TCA_NETEM_CORR]); in netem_change()
1086 get_reorder(q, tb[TCA_NETEM_REORDER]); in netem_change()
1089 get_corrupt(q, tb[TCA_NETEM_CORRUPT]); in netem_change()
1092 get_rate(q, tb[TCA_NETEM_RATE]); in netem_change()
1095 q->rate = max_t(u64, q->rate, in netem_change()
1099 q->latency = nla_get_s64(tb[TCA_NETEM_LATENCY64]); in netem_change()
1102 q->jitter = nla_get_s64(tb[TCA_NETEM_JITTER64]); in netem_change()
1105 q->ecn = nla_get_u32(tb[TCA_NETEM_ECN]); in netem_change()
1108 get_slot(q, tb[TCA_NETEM_SLOT]); in netem_change()
1111 q->jitter = min_t(s64, abs(q->jitter), INT_MAX); in netem_change()
1114 q->prng.seed = nla_get_u64(tb[TCA_NETEM_PRNG_SEED]); in netem_change()
1116 q->prng.seed = get_random_u64(); in netem_change()
1117 prandom_seed_state(&q->prng.prng_state, q->prng.seed); in netem_change()
1131 struct netem_sched_data *q = qdisc_priv(sch); in netem_init() local
1134 qdisc_watchdog_init(&q->watchdog, sch); in netem_init()
1139 q->loss_model = CLG_RANDOM; in netem_init()
1148 struct netem_sched_data *q = qdisc_priv(sch); in netem_destroy() local
1150 qdisc_watchdog_cancel(&q->watchdog); in netem_destroy()
1151 if (q->qdisc) in netem_destroy()
1152 qdisc_put(q->qdisc); in netem_destroy()
1153 dist_free(q->delay_dist); in netem_destroy()
1154 dist_free(q->slot_dist); in netem_destroy()
1157 static int dump_loss_model(const struct netem_sched_data *q, in dump_loss_model() argument
1166 switch (q->loss_model) { in dump_loss_model()
1174 .p13 = q->clg.a1, in dump_loss_model()
1175 .p31 = q->clg.a2, in dump_loss_model()
1176 .p32 = q->clg.a3, in dump_loss_model()
1177 .p14 = q->clg.a4, in dump_loss_model()
1178 .p23 = q->clg.a5, in dump_loss_model()
1187 .p = q->clg.a1, in dump_loss_model()
1188 .r = q->clg.a2, in dump_loss_model()
1189 .h = q->clg.a3, in dump_loss_model()
1190 .k1 = q->clg.a4, in dump_loss_model()
1209 const struct netem_sched_data *q = qdisc_priv(sch); in netem_dump() local
1218 qopt.latency = min_t(psched_time_t, PSCHED_NS2TICKS(q->latency), in netem_dump()
1220 qopt.jitter = min_t(psched_time_t, PSCHED_NS2TICKS(q->jitter), in netem_dump()
1222 qopt.limit = q->limit; in netem_dump()
1223 qopt.loss = q->loss; in netem_dump()
1224 qopt.gap = q->gap; in netem_dump()
1225 qopt.duplicate = q->duplicate; in netem_dump()
1229 if (nla_put(skb, TCA_NETEM_LATENCY64, sizeof(q->latency), &q->latency)) in netem_dump()
1232 if (nla_put(skb, TCA_NETEM_JITTER64, sizeof(q->jitter), &q->jitter)) in netem_dump()
1235 cor.delay_corr = q->delay_cor.rho; in netem_dump()
1236 cor.loss_corr = q->loss_cor.rho; in netem_dump()
1237 cor.dup_corr = q->dup_cor.rho; in netem_dump()
1241 reorder.probability = q->reorder; in netem_dump()
1242 reorder.correlation = q->reorder_cor.rho; in netem_dump()
1246 corrupt.probability = q->corrupt; in netem_dump()
1247 corrupt.correlation = q->corrupt_cor.rho; in netem_dump()
1251 if (q->rate >= (1ULL << 32)) { in netem_dump()
1252 if (nla_put_u64_64bit(skb, TCA_NETEM_RATE64, q->rate, in netem_dump()
1257 rate.rate = q->rate; in netem_dump()
1259 rate.packet_overhead = q->packet_overhead; in netem_dump()
1260 rate.cell_size = q->cell_size; in netem_dump()
1261 rate.cell_overhead = q->cell_overhead; in netem_dump()
1265 if (q->ecn && nla_put_u32(skb, TCA_NETEM_ECN, q->ecn)) in netem_dump()
1268 if (dump_loss_model(q, skb) != 0) in netem_dump()
1271 if (q->slot_config.min_delay | q->slot_config.max_delay | in netem_dump()
1272 q->slot_config.dist_jitter) { in netem_dump()
1273 slot = q->slot_config; in netem_dump()
1282 if (nla_put_u64_64bit(skb, TCA_NETEM_PRNG_SEED, q->prng.seed, in netem_dump()
1296 struct netem_sched_data *q = qdisc_priv(sch); in netem_dump_class() local
1298 if (cl != 1 || !q->qdisc) /* only one class */ in netem_dump_class()
1302 tcm->tcm_info = q->qdisc->handle; in netem_dump_class()
1310 struct netem_sched_data *q = qdisc_priv(sch); in netem_graft() local
1312 *old = qdisc_replace(sch, new, &q->qdisc); in netem_graft()
1318 struct netem_sched_data *q = qdisc_priv(sch); in netem_leaf() local
1319 return q->qdisc; in netem_leaf()