1#ifndef __NET_SCHED_GENERIC_H
2#define __NET_SCHED_GENERIC_H
3
4#include <linux/netdevice.h>
5#include <linux/types.h>
6#include <linux/rcupdate.h>
7#include <linux/pkt_sched.h>
8#include <linux/pkt_cls.h>
9#include <linux/percpu.h>
10#include <linux/dynamic_queue_limits.h>
11#include <net/gen_stats.h>
12#include <net/rtnetlink.h>
13
14struct Qdisc_ops;
15struct qdisc_walker;
16struct tcf_walker;
17struct module;
18
19struct qdisc_rate_table {
20 struct tc_ratespec rate;
21 u32 data[256];
22 struct qdisc_rate_table *next;
23 int refcnt;
24};
25
26enum qdisc_state_t {
27 __QDISC_STATE_SCHED,
28 __QDISC_STATE_DEACTIVATED,
29 __QDISC_STATE_THROTTLED,
30};
31
32
33
34
35enum qdisc___state_t {
36 __QDISC___STATE_RUNNING = 1,
37};
38
39struct qdisc_size_table {
40 struct rcu_head rcu;
41 struct list_head list;
42 struct tc_sizespec szopts;
43 int refcnt;
44 u16 data[];
45};
46
47struct Qdisc {
48 int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev);
49 struct sk_buff * (*dequeue)(struct Qdisc *dev);
50 unsigned int flags;
51#define TCQ_F_BUILTIN 1
52#define TCQ_F_INGRESS 2
53#define TCQ_F_CAN_BYPASS 4
54#define TCQ_F_MQROOT 8
55#define TCQ_F_ONETXQUEUE 0x10
56
57
58
59
60
61
62#define TCQ_F_WARN_NONWC (1 << 16)
63#define TCQ_F_CPUSTATS 0x20
64#define TCQ_F_NOPARENT 0x40
65
66
67 u32 limit;
68 const struct Qdisc_ops *ops;
69 struct qdisc_size_table __rcu *stab;
70 struct list_head list;
71 u32 handle;
72 u32 parent;
73 int (*reshape_fail)(struct sk_buff *skb,
74 struct Qdisc *q);
75
76 void *u32_node;
77
78
79
80
81 struct Qdisc *__parent;
82 struct netdev_queue *dev_queue;
83
84 struct gnet_stats_rate_est64 rate_est;
85 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
86 struct gnet_stats_queue __percpu *cpu_qstats;
87
88 struct Qdisc *next_sched;
89 struct sk_buff *gso_skb;
90
91
92
93 unsigned long state;
94 struct sk_buff_head q;
95 struct gnet_stats_basic_packed bstats;
96 unsigned int __state;
97 struct gnet_stats_queue qstats;
98 struct rcu_head rcu_head;
99 int padded;
100 atomic_t refcnt;
101
102 spinlock_t busylock ____cacheline_aligned_in_smp;
103};
104
105static inline bool qdisc_is_running(const struct Qdisc *qdisc)
106{
107 return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false;
108}
109
110static inline bool qdisc_run_begin(struct Qdisc *qdisc)
111{
112 if (qdisc_is_running(qdisc))
113 return false;
114 qdisc->__state |= __QDISC___STATE_RUNNING;
115 return true;
116}
117
118static inline void qdisc_run_end(struct Qdisc *qdisc)
119{
120 qdisc->__state &= ~__QDISC___STATE_RUNNING;
121}
122
123static inline bool qdisc_may_bulk(const struct Qdisc *qdisc)
124{
125 return qdisc->flags & TCQ_F_ONETXQUEUE;
126}
127
128static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq)
129{
130#ifdef CONFIG_BQL
131
132 return dql_avail(&txq->dql);
133#else
134 return 0;
135#endif
136}
137
138static inline bool qdisc_is_throttled(const struct Qdisc *qdisc)
139{
140 return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false;
141}
142
143static inline void qdisc_throttled(struct Qdisc *qdisc)
144{
145 set_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
146}
147
148static inline void qdisc_unthrottled(struct Qdisc *qdisc)
149{
150 clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
151}
152
153struct Qdisc_class_ops {
154
155 struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *);
156 int (*graft)(struct Qdisc *, unsigned long cl,
157 struct Qdisc *, struct Qdisc **);
158 struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
159 void (*qlen_notify)(struct Qdisc *, unsigned long);
160
161
162 unsigned long (*get)(struct Qdisc *, u32 classid);
163 void (*put)(struct Qdisc *, unsigned long);
164 int (*change)(struct Qdisc *, u32, u32,
165 struct nlattr **, unsigned long *);
166 int (*delete)(struct Qdisc *, unsigned long);
167 void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
168
169
170 struct tcf_proto __rcu ** (*tcf_chain)(struct Qdisc *, unsigned long);
171 unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
172 u32 classid);
173 void (*unbind_tcf)(struct Qdisc *, unsigned long);
174
175
176 int (*dump)(struct Qdisc *, unsigned long,
177 struct sk_buff *skb, struct tcmsg*);
178 int (*dump_stats)(struct Qdisc *, unsigned long,
179 struct gnet_dump *);
180};
181
182struct Qdisc_ops {
183 struct Qdisc_ops *next;
184 const struct Qdisc_class_ops *cl_ops;
185 char id[IFNAMSIZ];
186 int priv_size;
187
188 int (*enqueue)(struct sk_buff *, struct Qdisc *);
189 struct sk_buff * (*dequeue)(struct Qdisc *);
190 struct sk_buff * (*peek)(struct Qdisc *);
191 unsigned int (*drop)(struct Qdisc *);
192
193 int (*init)(struct Qdisc *, struct nlattr *arg);
194 void (*reset)(struct Qdisc *);
195 void (*destroy)(struct Qdisc *);
196 int (*change)(struct Qdisc *, struct nlattr *arg);
197 void (*attach)(struct Qdisc *);
198
199 int (*dump)(struct Qdisc *, struct sk_buff *);
200 int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
201
202 struct module *owner;
203};
204
205
206struct tcf_result {
207 unsigned long class;
208 u32 classid;
209};
210
211struct tcf_proto_ops {
212 struct list_head head;
213 char kind[IFNAMSIZ];
214
215 int (*classify)(struct sk_buff *,
216 const struct tcf_proto *,
217 struct tcf_result *);
218 int (*init)(struct tcf_proto*);
219 bool (*destroy)(struct tcf_proto*, bool);
220
221 unsigned long (*get)(struct tcf_proto*, u32 handle);
222 int (*change)(struct net *net, struct sk_buff *,
223 struct tcf_proto*, unsigned long,
224 u32 handle, struct nlattr **,
225 unsigned long *, bool);
226 int (*delete)(struct tcf_proto*, unsigned long);
227 void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
228
229
230 int (*dump)(struct net*, struct tcf_proto*, unsigned long,
231 struct sk_buff *skb, struct tcmsg*);
232
233 struct module *owner;
234};
235
236struct tcf_proto {
237
238 struct tcf_proto __rcu *next;
239 void __rcu *root;
240 int (*classify)(struct sk_buff *,
241 const struct tcf_proto *,
242 struct tcf_result *);
243 __be16 protocol;
244
245
246 u32 prio;
247 u32 classid;
248 struct Qdisc *q;
249 void *data;
250 const struct tcf_proto_ops *ops;
251 struct rcu_head rcu;
252};
253
254struct qdisc_skb_cb {
255 unsigned int pkt_len;
256 u16 slave_dev_queue_mapping;
257 u16 tc_classid;
258#define QDISC_CB_PRIV_LEN 20
259 unsigned char data[QDISC_CB_PRIV_LEN];
260};
261
262static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)
263{
264 struct qdisc_skb_cb *qcb;
265
266 BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz);
267 BUILD_BUG_ON(sizeof(qcb->data) < sz);
268}
269
270static inline int qdisc_qlen(const struct Qdisc *q)
271{
272 return q->q.qlen;
273}
274
275static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb)
276{
277 return (struct qdisc_skb_cb *)skb->cb;
278}
279
280static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc)
281{
282 return &qdisc->q.lock;
283}
284
285static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc)
286{
287 struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc);
288
289 return q;
290}
291
292static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc)
293{
294 return qdisc->dev_queue->qdisc_sleeping;
295}
296
297
298
299
300
301
302
303
304
305
306
307
308static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc)
309{
310 struct Qdisc *root = qdisc_root(qdisc);
311
312 ASSERT_RTNL();
313 return qdisc_lock(root);
314}
315
316static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc)
317{
318 struct Qdisc *root = qdisc_root_sleeping(qdisc);
319
320 ASSERT_RTNL();
321 return qdisc_lock(root);
322}
323
324static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc)
325{
326 return qdisc->dev_queue->dev;
327}
328
329static inline void sch_tree_lock(const struct Qdisc *q)
330{
331 spin_lock_bh(qdisc_root_sleeping_lock(q));
332}
333
334static inline void sch_tree_unlock(const struct Qdisc *q)
335{
336 spin_unlock_bh(qdisc_root_sleeping_lock(q));
337}
338
339#define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
340#define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
341
342extern struct Qdisc noop_qdisc;
343extern struct Qdisc_ops noop_qdisc_ops;
344extern struct Qdisc_ops pfifo_fast_ops;
345extern struct Qdisc_ops mq_qdisc_ops;
346extern struct Qdisc_ops noqueue_qdisc_ops;
347extern const struct Qdisc_ops *default_qdisc_ops;
348static inline const struct Qdisc_ops *
349get_default_qdisc_ops(const struct net_device *dev, int ntx)
350{
351 return ntx < dev->real_num_tx_queues ?
352 default_qdisc_ops : &pfifo_fast_ops;
353}
354
355struct Qdisc_class_common {
356 u32 classid;
357 struct hlist_node hnode;
358};
359
360struct Qdisc_class_hash {
361 struct hlist_head *hash;
362 unsigned int hashsize;
363 unsigned int hashmask;
364 unsigned int hashelems;
365};
366
367static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
368{
369 id ^= id >> 8;
370 id ^= id >> 4;
371 return id & mask;
372}
373
374static inline struct Qdisc_class_common *
375qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id)
376{
377 struct Qdisc_class_common *cl;
378 unsigned int h;
379
380 h = qdisc_class_hash(id, hash->hashmask);
381 hlist_for_each_entry(cl, &hash->hash[h], hnode) {
382 if (cl->classid == id)
383 return cl;
384 }
385 return NULL;
386}
387
388int qdisc_class_hash_init(struct Qdisc_class_hash *);
389void qdisc_class_hash_insert(struct Qdisc_class_hash *,
390 struct Qdisc_class_common *);
391void qdisc_class_hash_remove(struct Qdisc_class_hash *,
392 struct Qdisc_class_common *);
393void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);
394void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
395
396void dev_init_scheduler(struct net_device *dev);
397void dev_shutdown(struct net_device *dev);
398void dev_activate(struct net_device *dev);
399void dev_deactivate(struct net_device *dev);
400void dev_deactivate_many(struct list_head *head);
401struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
402 struct Qdisc *qdisc);
403void qdisc_reset(struct Qdisc *qdisc);
404void qdisc_destroy(struct Qdisc *qdisc);
405void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n,
406 unsigned int len);
407struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
408 const struct Qdisc_ops *ops);
409struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
410 const struct Qdisc_ops *ops, u32 parentid);
411void __qdisc_calculate_pkt_len(struct sk_buff *skb,
412 const struct qdisc_size_table *stab);
413bool tcf_destroy(struct tcf_proto *tp, bool force);
414void tcf_destroy_chain(struct tcf_proto __rcu **fl);
415int skb_do_redirect(struct sk_buff *);
416
417static inline bool skb_at_tc_ingress(const struct sk_buff *skb)
418{
419#ifdef CONFIG_NET_CLS_ACT
420 return G_TC_AT(skb->tc_verd) & AT_INGRESS;
421#else
422 return false;
423#endif
424}
425
426
427static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
428{
429 struct Qdisc *qdisc;
430
431 for (; i < dev->num_tx_queues; i++) {
432 qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc);
433 if (qdisc) {
434 spin_lock_bh(qdisc_lock(qdisc));
435 qdisc_reset(qdisc);
436 spin_unlock_bh(qdisc_lock(qdisc));
437 }
438 }
439}
440
441static inline void qdisc_reset_all_tx(struct net_device *dev)
442{
443 qdisc_reset_all_tx_gt(dev, 0);
444}
445
446
447static inline bool qdisc_all_tx_empty(const struct net_device *dev)
448{
449 unsigned int i;
450
451 rcu_read_lock();
452 for (i = 0; i < dev->num_tx_queues; i++) {
453 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
454 const struct Qdisc *q = rcu_dereference(txq->qdisc);
455
456 if (q->q.qlen) {
457 rcu_read_unlock();
458 return false;
459 }
460 }
461 rcu_read_unlock();
462 return true;
463}
464
465
466static inline bool qdisc_tx_changing(const struct net_device *dev)
467{
468 unsigned int i;
469
470 for (i = 0; i < dev->num_tx_queues; i++) {
471 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
472 if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping)
473 return true;
474 }
475 return false;
476}
477
478
479static inline bool qdisc_tx_is_noop(const struct net_device *dev)
480{
481 unsigned int i;
482
483 for (i = 0; i < dev->num_tx_queues; i++) {
484 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
485 if (rcu_access_pointer(txq->qdisc) != &noop_qdisc)
486 return false;
487 }
488 return true;
489}
490
491static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb)
492{
493 return qdisc_skb_cb(skb)->pkt_len;
494}
495
496
497enum net_xmit_qdisc_t {
498 __NET_XMIT_STOLEN = 0x00010000,
499 __NET_XMIT_BYPASS = 0x00020000,
500};
501
502#ifdef CONFIG_NET_CLS_ACT
503#define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
504#else
505#define net_xmit_drop_count(e) (1)
506#endif
507
508static inline void qdisc_calculate_pkt_len(struct sk_buff *skb,
509 const struct Qdisc *sch)
510{
511#ifdef CONFIG_NET_SCHED
512 struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab);
513
514 if (stab)
515 __qdisc_calculate_pkt_len(skb, stab);
516#endif
517}
518
519static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
520{
521 qdisc_calculate_pkt_len(skb, sch);
522 return sch->enqueue(skb, sch);
523}
524
525static inline bool qdisc_is_percpu_stats(const struct Qdisc *q)
526{
527 return q->flags & TCQ_F_CPUSTATS;
528}
529
530static inline void bstats_update(struct gnet_stats_basic_packed *bstats,
531 const struct sk_buff *skb)
532{
533 bstats->bytes += qdisc_pkt_len(skb);
534 bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
535}
536
537static inline void bstats_cpu_update(struct gnet_stats_basic_cpu *bstats,
538 const struct sk_buff *skb)
539{
540 u64_stats_update_begin(&bstats->syncp);
541 bstats_update(&bstats->bstats, skb);
542 u64_stats_update_end(&bstats->syncp);
543}
544
545static inline void qdisc_bstats_cpu_update(struct Qdisc *sch,
546 const struct sk_buff *skb)
547{
548 bstats_cpu_update(this_cpu_ptr(sch->cpu_bstats), skb);
549}
550
551static inline void qdisc_bstats_update(struct Qdisc *sch,
552 const struct sk_buff *skb)
553{
554 bstats_update(&sch->bstats, skb);
555}
556
557static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch,
558 const struct sk_buff *skb)
559{
560 sch->qstats.backlog -= qdisc_pkt_len(skb);
561}
562
563static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch,
564 const struct sk_buff *skb)
565{
566 sch->qstats.backlog += qdisc_pkt_len(skb);
567}
568
569static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count)
570{
571 sch->qstats.drops += count;
572}
573
574static inline void qstats_drop_inc(struct gnet_stats_queue *qstats)
575{
576 qstats->drops++;
577}
578
579static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats)
580{
581 qstats->overlimits++;
582}
583
584static inline void qdisc_qstats_drop(struct Qdisc *sch)
585{
586 qstats_drop_inc(&sch->qstats);
587}
588
589static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch)
590{
591 qstats_drop_inc(this_cpu_ptr(sch->cpu_qstats));
592}
593
594static inline void qdisc_qstats_overlimit(struct Qdisc *sch)
595{
596 sch->qstats.overlimits++;
597}
598
599static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
600 struct sk_buff_head *list)
601{
602 __skb_queue_tail(list, skb);
603 qdisc_qstats_backlog_inc(sch, skb);
604
605 return NET_XMIT_SUCCESS;
606}
607
608static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
609{
610 return __qdisc_enqueue_tail(skb, sch, &sch->q);
611}
612
613static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch,
614 struct sk_buff_head *list)
615{
616 struct sk_buff *skb = __skb_dequeue(list);
617
618 if (likely(skb != NULL)) {
619 qdisc_qstats_backlog_dec(sch, skb);
620 qdisc_bstats_update(sch, skb);
621 }
622
623 return skb;
624}
625
626static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
627{
628 return __qdisc_dequeue_head(sch, &sch->q);
629}
630
631static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
632 struct sk_buff_head *list)
633{
634 struct sk_buff *skb = __skb_dequeue(list);
635
636 if (likely(skb != NULL)) {
637 unsigned int len = qdisc_pkt_len(skb);
638 qdisc_qstats_backlog_dec(sch, skb);
639 kfree_skb(skb);
640 return len;
641 }
642
643 return 0;
644}
645
646static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch)
647{
648 return __qdisc_queue_drop_head(sch, &sch->q);
649}
650
651static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch,
652 struct sk_buff_head *list)
653{
654 struct sk_buff *skb = __skb_dequeue_tail(list);
655
656 if (likely(skb != NULL))
657 qdisc_qstats_backlog_dec(sch, skb);
658
659 return skb;
660}
661
662static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch)
663{
664 return __qdisc_dequeue_tail(sch, &sch->q);
665}
666
667static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch)
668{
669 return skb_peek(&sch->q);
670}
671
672
673static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch)
674{
675
676 if (!sch->gso_skb) {
677 sch->gso_skb = sch->dequeue(sch);
678 if (sch->gso_skb)
679
680 sch->q.qlen++;
681 }
682
683 return sch->gso_skb;
684}
685
686
687static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch)
688{
689 struct sk_buff *skb = sch->gso_skb;
690
691 if (skb) {
692 sch->gso_skb = NULL;
693 sch->q.qlen--;
694 } else {
695 skb = sch->dequeue(sch);
696 }
697
698 return skb;
699}
700
701static inline void __qdisc_reset_queue(struct Qdisc *sch,
702 struct sk_buff_head *list)
703{
704
705
706
707
708 __skb_queue_purge(list);
709}
710
711static inline void qdisc_reset_queue(struct Qdisc *sch)
712{
713 __qdisc_reset_queue(sch, &sch->q);
714 sch->qstats.backlog = 0;
715}
716
717static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new,
718 struct Qdisc **pold)
719{
720 struct Qdisc *old;
721
722 sch_tree_lock(sch);
723 old = *pold;
724 *pold = new;
725 if (old != NULL) {
726 qdisc_tree_reduce_backlog(old, old->q.qlen, old->qstats.backlog);
727 qdisc_reset(old);
728 }
729 sch_tree_unlock(sch);
730
731 return old;
732}
733
734static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
735 struct sk_buff_head *list)
736{
737 struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
738
739 if (likely(skb != NULL)) {
740 unsigned int len = qdisc_pkt_len(skb);
741 kfree_skb(skb);
742 return len;
743 }
744
745 return 0;
746}
747
748static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
749{
750 return __qdisc_queue_drop(sch, &sch->q);
751}
752
753static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
754{
755 kfree_skb(skb);
756 qdisc_qstats_drop(sch);
757
758 return NET_XMIT_DROP;
759}
760
761static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch)
762{
763 qdisc_qstats_drop(sch);
764
765#ifdef CONFIG_NET_CLS_ACT
766 if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch))
767 goto drop;
768
769 return NET_XMIT_SUCCESS;
770
771drop:
772#endif
773 kfree_skb(skb);
774 return NET_XMIT_DROP;
775}
776
777
778
779
780static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
781{
782 int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
783 if (slot < 0)
784 slot = 0;
785 slot >>= rtab->rate.cell_log;
786 if (slot > 255)
787 return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF];
788 return rtab->data[slot];
789}
790
791struct psched_ratecfg {
792 u64 rate_bytes_ps;
793 u32 mult;
794 u16 overhead;
795 u8 linklayer;
796 u8 shift;
797};
798
799static inline u64 psched_l2t_ns(const struct psched_ratecfg *r,
800 unsigned int len)
801{
802 len += r->overhead;
803
804 if (unlikely(r->linklayer == TC_LINKLAYER_ATM))
805 return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift;
806
807 return ((u64)len * r->mult) >> r->shift;
808}
809
810void psched_ratecfg_precompute(struct psched_ratecfg *r,
811 const struct tc_ratespec *conf,
812 u64 rate64);
813
814static inline void psched_ratecfg_getrate(struct tc_ratespec *res,
815 const struct psched_ratecfg *r)
816{
817 memset(res, 0, sizeof(*res));
818
819
820
821
822
823 res->rate = min_t(u64, r->rate_bytes_ps, ~0U);
824
825 res->overhead = r->overhead;
826 res->linklayer = (r->linklayer & TC_LINKLAYER_MASK);
827}
828
829#endif
830