Lines Matching refs:q
207 static bool loss_4state(struct netem_sched_data *q) in loss_4state() argument
209 struct clgstate *clg = &q->clg; in loss_4state()
210 u32 rnd = prandom_u32_state(&q->prng.prng_state); in loss_4state()
272 static bool loss_gilb_ell(struct netem_sched_data *q) in loss_gilb_ell() argument
274 struct clgstate *clg = &q->clg; in loss_gilb_ell()
275 struct rnd_state *s = &q->prng.prng_state; in loss_gilb_ell()
294 static bool loss_event(struct netem_sched_data *q) in loss_event() argument
296 switch (q->loss_model) { in loss_event()
299 return q->loss && q->loss >= get_crandom(&q->loss_cor, &q->prng); in loss_event()
307 return loss_4state(q); in loss_event()
315 return loss_gilb_ell(q); in loss_event()
354 static u64 packet_time_ns(u64 len, const struct netem_sched_data *q) in packet_time_ns() argument
356 len += q->packet_overhead; in packet_time_ns()
358 if (q->cell_size) { in packet_time_ns()
359 u32 cells = reciprocal_divide(len, q->cell_size_reciprocal); in packet_time_ns()
361 if (len > cells * q->cell_size) /* extra cell needed for remainder */ in packet_time_ns()
363 len = cells * (q->cell_size + q->cell_overhead); in packet_time_ns()
366 return div64_u64(len * NSEC_PER_SEC, q->rate); in packet_time_ns()
371 struct netem_sched_data *q = qdisc_priv(sch); in tfifo_reset() local
372 struct rb_node *p = rb_first(&q->t_root); in tfifo_reset()
378 rb_erase(&skb->rbnode, &q->t_root); in tfifo_reset()
382 rtnl_kfree_skbs(q->t_head, q->t_tail); in tfifo_reset()
383 q->t_head = NULL; in tfifo_reset()
384 q->t_tail = NULL; in tfifo_reset()
389 struct netem_sched_data *q = qdisc_priv(sch); in tfifo_enqueue() local
392 if (!q->t_tail || tnext >= netem_skb_cb(q->t_tail)->time_to_send) { in tfifo_enqueue()
393 if (q->t_tail) in tfifo_enqueue()
394 q->t_tail->next = nskb; in tfifo_enqueue()
396 q->t_head = nskb; in tfifo_enqueue()
397 q->t_tail = nskb; in tfifo_enqueue()
399 struct rb_node **p = &q->t_root.rb_node, *parent = NULL; in tfifo_enqueue()
412 rb_insert_color(&nskb->rbnode, &q->t_root); in tfifo_enqueue()
414 sch->q.qlen++; in tfifo_enqueue()
446 struct netem_sched_data *q = qdisc_priv(sch); in netem_enqueue() local
460 if (q->duplicate && q->duplicate >= get_crandom(&q->dup_cor, &q->prng)) in netem_enqueue()
464 if (loss_event(q)) { in netem_enqueue()
465 if (q->ecn && INET_ECN_set_ce(skb)) in netem_enqueue()
479 if (q->latency || q->jitter || q->rate) in netem_enqueue()
489 u32 dupsave = q->duplicate; /* prevent duplicating a dup... */ in netem_enqueue()
491 q->duplicate = 0; in netem_enqueue()
493 q->duplicate = dupsave; in netem_enqueue()
503 if (q->corrupt && q->corrupt >= get_crandom(&q->corrupt_cor, &q->prng)) { in netem_enqueue()
529 if (unlikely(sch->q.qlen >= sch->limit)) { in netem_enqueue()
539 if (q->gap == 0 || /* not doing reordering */ in netem_enqueue()
540 q->counter < q->gap - 1 || /* inside last reordering gap */ in netem_enqueue()
541 q->reorder < get_crandom(&q->reorder_cor, &q->prng)) { in netem_enqueue()
545 delay = tabledist(q->latency, q->jitter, in netem_enqueue()
546 &q->delay_cor, &q->prng, q->delay_dist); in netem_enqueue()
550 if (q->rate) { in netem_enqueue()
553 if (sch->q.tail) in netem_enqueue()
554 last = netem_skb_cb(sch->q.tail); in netem_enqueue()
555 if (q->t_root.rb_node) { in netem_enqueue()
559 t_skb = skb_rb_last(&q->t_root); in netem_enqueue()
565 if (q->t_tail) { in netem_enqueue()
567 netem_skb_cb(q->t_tail); in netem_enqueue()
585 delay += packet_time_ns(qdisc_pkt_len(skb), q); in netem_enqueue()
589 ++q->counter; in netem_enqueue()
597 q->counter = 0; in netem_enqueue()
599 __qdisc_enqueue_head(skb, &sch->q); in netem_enqueue()
638 static void get_slot_next(struct netem_sched_data *q, u64 now) in get_slot_next() argument
642 if (!q->slot_dist) in get_slot_next()
643 next_delay = q->slot_config.min_delay + in get_slot_next()
645 (q->slot_config.max_delay - in get_slot_next()
646 q->slot_config.min_delay) >> 32); in get_slot_next()
648 next_delay = tabledist(q->slot_config.dist_delay, in get_slot_next()
649 (s32)(q->slot_config.dist_jitter), in get_slot_next()
650 NULL, &q->prng, q->slot_dist); in get_slot_next()
652 q->slot.slot_next = now + next_delay; in get_slot_next()
653 q->slot.packets_left = q->slot_config.max_packets; in get_slot_next()
654 q->slot.bytes_left = q->slot_config.max_bytes; in get_slot_next()
657 static struct sk_buff *netem_peek(struct netem_sched_data *q) in netem_peek() argument
659 struct sk_buff *skb = skb_rb_first(&q->t_root); in netem_peek()
663 return q->t_head; in netem_peek()
664 if (!q->t_head) in netem_peek()
668 t2 = netem_skb_cb(q->t_head)->time_to_send; in netem_peek()
671 return q->t_head; in netem_peek()
674 static void netem_erase_head(struct netem_sched_data *q, struct sk_buff *skb) in netem_erase_head() argument
676 if (skb == q->t_head) { in netem_erase_head()
677 q->t_head = skb->next; in netem_erase_head()
678 if (!q->t_head) in netem_erase_head()
679 q->t_tail = NULL; in netem_erase_head()
681 rb_erase(&skb->rbnode, &q->t_root); in netem_erase_head()
687 struct netem_sched_data *q = qdisc_priv(sch); in netem_dequeue() local
691 skb = __qdisc_dequeue_head(&sch->q); in netem_dequeue()
698 skb = netem_peek(q); in netem_dequeue()
705 if (q->slot.slot_next && q->slot.slot_next < time_to_send) in netem_dequeue()
706 get_slot_next(q, now); in netem_dequeue()
708 if (time_to_send <= now && q->slot.slot_next <= now) { in netem_dequeue()
709 netem_erase_head(q, skb); in netem_dequeue()
710 sch->q.qlen--; in netem_dequeue()
719 if (q->slot.slot_next) { in netem_dequeue()
720 q->slot.packets_left--; in netem_dequeue()
721 q->slot.bytes_left -= qdisc_pkt_len(skb); in netem_dequeue()
722 if (q->slot.packets_left <= 0 || in netem_dequeue()
723 q->slot.bytes_left <= 0) in netem_dequeue()
724 get_slot_next(q, now); in netem_dequeue()
727 if (q->qdisc) { in netem_dequeue()
732 err = qdisc_enqueue(skb, q->qdisc, &to_free); in netem_dequeue()
745 if (q->qdisc) { in netem_dequeue()
746 skb = q->qdisc->ops->dequeue(q->qdisc); in netem_dequeue()
751 qdisc_watchdog_schedule_ns(&q->watchdog, in netem_dequeue()
753 q->slot.slot_next)); in netem_dequeue()
756 if (q->qdisc) { in netem_dequeue()
757 skb = q->qdisc->ops->dequeue(q->qdisc); in netem_dequeue()
766 struct netem_sched_data *q = qdisc_priv(sch); in netem_reset() local
770 if (q->qdisc) in netem_reset()
771 qdisc_reset(q->qdisc); in netem_reset()
772 qdisc_watchdog_cancel(&q->watchdog); in netem_reset()
807 static void get_slot(struct netem_sched_data *q, const struct nlattr *attr) in get_slot() argument
811 q->slot_config = *c; in get_slot()
812 if (q->slot_config.max_packets == 0) in get_slot()
813 q->slot_config.max_packets = INT_MAX; in get_slot()
814 if (q->slot_config.max_bytes == 0) in get_slot()
815 q->slot_config.max_bytes = INT_MAX; in get_slot()
818 q->slot_config.dist_jitter = min_t(__s64, INT_MAX, abs(q->slot_config.dist_jitter)); in get_slot()
820 q->slot.packets_left = q->slot_config.max_packets; in get_slot()
821 q->slot.bytes_left = q->slot_config.max_bytes; in get_slot()
822 if (q->slot_config.min_delay | q->slot_config.max_delay | in get_slot()
823 q->slot_config.dist_jitter) in get_slot()
824 q->slot.slot_next = ktime_get_ns(); in get_slot()
826 q->slot.slot_next = 0; in get_slot()
829 static void get_correlation(struct netem_sched_data *q, const struct nlattr *attr) in get_correlation() argument
833 init_crandom(&q->delay_cor, c->delay_corr); in get_correlation()
834 init_crandom(&q->loss_cor, c->loss_corr); in get_correlation()
835 init_crandom(&q->dup_cor, c->dup_corr); in get_correlation()
838 static void get_reorder(struct netem_sched_data *q, const struct nlattr *attr) in get_reorder() argument
842 q->reorder = r->probability; in get_reorder()
843 init_crandom(&q->reorder_cor, r->correlation); in get_reorder()
846 static void get_corrupt(struct netem_sched_data *q, const struct nlattr *attr) in get_corrupt() argument
850 q->corrupt = r->probability; in get_corrupt()
851 init_crandom(&q->corrupt_cor, r->correlation); in get_corrupt()
854 static void get_rate(struct netem_sched_data *q, const struct nlattr *attr) in get_rate() argument
858 q->rate = r->rate; in get_rate()
859 q->packet_overhead = r->packet_overhead; in get_rate()
860 q->cell_size = r->cell_size; in get_rate()
861 q->cell_overhead = r->cell_overhead; in get_rate()
862 if (q->cell_size) in get_rate()
863 q->cell_size_reciprocal = reciprocal_value(q->cell_size); in get_rate()
865 q->cell_size_reciprocal = (struct reciprocal_value) { 0 }; in get_rate()
868 static int get_loss_clg(struct netem_sched_data *q, const struct nlattr *attr) in get_loss_clg() argument
885 q->loss_model = CLG_4_STATES; in get_loss_clg()
887 q->clg.state = TX_IN_GAP_PERIOD; in get_loss_clg()
888 q->clg.a1 = gi->p13; in get_loss_clg()
889 q->clg.a2 = gi->p31; in get_loss_clg()
890 q->clg.a3 = gi->p32; in get_loss_clg()
891 q->clg.a4 = gi->p14; in get_loss_clg()
892 q->clg.a5 = gi->p23; in get_loss_clg()
904 q->loss_model = CLG_GILB_ELL; in get_loss_clg()
905 q->clg.state = GOOD_STATE; in get_loss_clg()
906 q->clg.a1 = ge->p; in get_loss_clg()
907 q->clg.a2 = ge->r; in get_loss_clg()
908 q->clg.a3 = ge->h; in get_loss_clg()
909 q->clg.a4 = ge->k1; in get_loss_clg()
959 struct netem_sched_data *q = qdisc_priv(sch); in netem_change() local
987 old_clg = q->clg; in netem_change()
988 old_loss_model = q->loss_model; in netem_change()
991 ret = get_loss_clg(q, tb[TCA_NETEM_LOSS]); in netem_change()
993 q->loss_model = old_loss_model; in netem_change()
994 q->clg = old_clg; in netem_change()
998 q->loss_model = CLG_RANDOM; in netem_change()
1002 swap(q->delay_dist, delay_dist); in netem_change()
1004 swap(q->slot_dist, slot_dist); in netem_change()
1007 q->latency = PSCHED_TICKS2NS(qopt->latency); in netem_change()
1008 q->jitter = PSCHED_TICKS2NS(qopt->jitter); in netem_change()
1009 q->limit = qopt->limit; in netem_change()
1010 q->gap = qopt->gap; in netem_change()
1011 q->counter = 0; in netem_change()
1012 q->loss = qopt->loss; in netem_change()
1013 q->duplicate = qopt->duplicate; in netem_change()
1018 if (q->gap) in netem_change()
1019 q->reorder = ~0; in netem_change()
1022 get_correlation(q, tb[TCA_NETEM_CORR]); in netem_change()
1025 get_reorder(q, tb[TCA_NETEM_REORDER]); in netem_change()
1028 get_corrupt(q, tb[TCA_NETEM_CORRUPT]); in netem_change()
1031 get_rate(q, tb[TCA_NETEM_RATE]); in netem_change()
1034 q->rate = max_t(u64, q->rate, in netem_change()
1038 q->latency = nla_get_s64(tb[TCA_NETEM_LATENCY64]); in netem_change()
1041 q->jitter = nla_get_s64(tb[TCA_NETEM_JITTER64]); in netem_change()
1044 q->ecn = nla_get_u32(tb[TCA_NETEM_ECN]); in netem_change()
1047 get_slot(q, tb[TCA_NETEM_SLOT]); in netem_change()
1050 q->jitter = min_t(s64, abs(q->jitter), INT_MAX); in netem_change()
1053 q->prng.seed = nla_get_u64(tb[TCA_NETEM_PRNG_SEED]); in netem_change()
1055 q->prng.seed = get_random_u64(); in netem_change()
1056 prandom_seed_state(&q->prng.prng_state, q->prng.seed); in netem_change()
1070 struct netem_sched_data *q = qdisc_priv(sch); in netem_init() local
1073 qdisc_watchdog_init(&q->watchdog, sch); in netem_init()
1078 q->loss_model = CLG_RANDOM; in netem_init()
1087 struct netem_sched_data *q = qdisc_priv(sch); in netem_destroy() local
1089 qdisc_watchdog_cancel(&q->watchdog); in netem_destroy()
1090 if (q->qdisc) in netem_destroy()
1091 qdisc_put(q->qdisc); in netem_destroy()
1092 dist_free(q->delay_dist); in netem_destroy()
1093 dist_free(q->slot_dist); in netem_destroy()
1096 static int dump_loss_model(const struct netem_sched_data *q, in dump_loss_model() argument
1105 switch (q->loss_model) { in dump_loss_model()
1113 .p13 = q->clg.a1, in dump_loss_model()
1114 .p31 = q->clg.a2, in dump_loss_model()
1115 .p32 = q->clg.a3, in dump_loss_model()
1116 .p14 = q->clg.a4, in dump_loss_model()
1117 .p23 = q->clg.a5, in dump_loss_model()
1126 .p = q->clg.a1, in dump_loss_model()
1127 .r = q->clg.a2, in dump_loss_model()
1128 .h = q->clg.a3, in dump_loss_model()
1129 .k1 = q->clg.a4, in dump_loss_model()
1148 const struct netem_sched_data *q = qdisc_priv(sch); in netem_dump() local
1157 qopt.latency = min_t(psched_time_t, PSCHED_NS2TICKS(q->latency), in netem_dump()
1159 qopt.jitter = min_t(psched_time_t, PSCHED_NS2TICKS(q->jitter), in netem_dump()
1161 qopt.limit = q->limit; in netem_dump()
1162 qopt.loss = q->loss; in netem_dump()
1163 qopt.gap = q->gap; in netem_dump()
1164 qopt.duplicate = q->duplicate; in netem_dump()
1168 if (nla_put(skb, TCA_NETEM_LATENCY64, sizeof(q->latency), &q->latency)) in netem_dump()
1171 if (nla_put(skb, TCA_NETEM_JITTER64, sizeof(q->jitter), &q->jitter)) in netem_dump()
1174 cor.delay_corr = q->delay_cor.rho; in netem_dump()
1175 cor.loss_corr = q->loss_cor.rho; in netem_dump()
1176 cor.dup_corr = q->dup_cor.rho; in netem_dump()
1180 reorder.probability = q->reorder; in netem_dump()
1181 reorder.correlation = q->reorder_cor.rho; in netem_dump()
1185 corrupt.probability = q->corrupt; in netem_dump()
1186 corrupt.correlation = q->corrupt_cor.rho; in netem_dump()
1190 if (q->rate >= (1ULL << 32)) { in netem_dump()
1191 if (nla_put_u64_64bit(skb, TCA_NETEM_RATE64, q->rate, in netem_dump()
1196 rate.rate = q->rate; in netem_dump()
1198 rate.packet_overhead = q->packet_overhead; in netem_dump()
1199 rate.cell_size = q->cell_size; in netem_dump()
1200 rate.cell_overhead = q->cell_overhead; in netem_dump()
1204 if (q->ecn && nla_put_u32(skb, TCA_NETEM_ECN, q->ecn)) in netem_dump()
1207 if (dump_loss_model(q, skb) != 0) in netem_dump()
1210 if (q->slot_config.min_delay | q->slot_config.max_delay | in netem_dump()
1211 q->slot_config.dist_jitter) { in netem_dump()
1212 slot = q->slot_config; in netem_dump()
1221 if (nla_put_u64_64bit(skb, TCA_NETEM_PRNG_SEED, q->prng.seed, in netem_dump()
1235 struct netem_sched_data *q = qdisc_priv(sch); in netem_dump_class() local
1237 if (cl != 1 || !q->qdisc) /* only one class */ in netem_dump_class()
1241 tcm->tcm_info = q->qdisc->handle; in netem_dump_class()
1249 struct netem_sched_data *q = qdisc_priv(sch); in netem_graft() local
1251 *old = qdisc_replace(sch, new, &q->qdisc); in netem_graft()
1257 struct netem_sched_data *q = qdisc_priv(sch); in netem_leaf() local
1258 return q->qdisc; in netem_leaf()