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};
30
31struct qdisc_size_table {
32 struct rcu_head rcu;
33 struct list_head list;
34 struct tc_sizespec szopts;
35 int refcnt;
36 u16 data[];
37};
38
39struct Qdisc {
40 int (*enqueue)(struct sk_buff *skb,
41 struct Qdisc *sch,
42 struct sk_buff **to_free);
43 struct sk_buff * (*dequeue)(struct Qdisc *sch);
44 unsigned int flags;
45#define TCQ_F_BUILTIN 1
46#define TCQ_F_INGRESS 2
47#define TCQ_F_CAN_BYPASS 4
48#define TCQ_F_MQROOT 8
49#define TCQ_F_ONETXQUEUE 0x10
50
51
52
53
54
55
56#define TCQ_F_WARN_NONWC (1 << 16)
57#define TCQ_F_CPUSTATS 0x20
58#define TCQ_F_NOPARENT 0x40
59
60
61 u32 limit;
62 const struct Qdisc_ops *ops;
63 struct qdisc_size_table __rcu *stab;
64 struct list_head list;
65 u32 handle;
66 u32 parent;
67 void *u32_node;
68
69 struct netdev_queue *dev_queue;
70
71 struct gnet_stats_rate_est64 rate_est;
72 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
73 struct gnet_stats_queue __percpu *cpu_qstats;
74
75
76
77
78 struct sk_buff *gso_skb ____cacheline_aligned_in_smp;
79 struct sk_buff_head q;
80 struct gnet_stats_basic_packed bstats;
81 seqcount_t running;
82 struct gnet_stats_queue qstats;
83 unsigned long state;
84 struct Qdisc *next_sched;
85 struct sk_buff *skb_bad_txq;
86 struct rcu_head rcu_head;
87 int padded;
88 atomic_t refcnt;
89
90 spinlock_t busylock ____cacheline_aligned_in_smp;
91};
92
93static inline bool qdisc_is_running(const struct Qdisc *qdisc)
94{
95 return (raw_read_seqcount(&qdisc->running) & 1) ? true : false;
96}
97
98static inline bool qdisc_run_begin(struct Qdisc *qdisc)
99{
100 if (qdisc_is_running(qdisc))
101 return false;
102
103
104
105 raw_write_seqcount_begin(&qdisc->running);
106 seqcount_acquire(&qdisc->running.dep_map, 0, 1, _RET_IP_);
107 return true;
108}
109
110static inline void qdisc_run_end(struct Qdisc *qdisc)
111{
112 write_seqcount_end(&qdisc->running);
113}
114
115static inline bool qdisc_may_bulk(const struct Qdisc *qdisc)
116{
117 return qdisc->flags & TCQ_F_ONETXQUEUE;
118}
119
120static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq)
121{
122#ifdef CONFIG_BQL
123
124 return dql_avail(&txq->dql);
125#else
126 return 0;
127#endif
128}
129
130struct Qdisc_class_ops {
131
132 struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *);
133 int (*graft)(struct Qdisc *, unsigned long cl,
134 struct Qdisc *, struct Qdisc **);
135 struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
136 void (*qlen_notify)(struct Qdisc *, unsigned long);
137
138
139 unsigned long (*get)(struct Qdisc *, u32 classid);
140 void (*put)(struct Qdisc *, unsigned long);
141 int (*change)(struct Qdisc *, u32, u32,
142 struct nlattr **, unsigned long *);
143 int (*delete)(struct Qdisc *, unsigned long);
144 void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
145
146
147 struct tcf_proto __rcu ** (*tcf_chain)(struct Qdisc *, unsigned long);
148 bool (*tcf_cl_offload)(u32 classid);
149 unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
150 u32 classid);
151 void (*unbind_tcf)(struct Qdisc *, unsigned long);
152
153
154 int (*dump)(struct Qdisc *, unsigned long,
155 struct sk_buff *skb, struct tcmsg*);
156 int (*dump_stats)(struct Qdisc *, unsigned long,
157 struct gnet_dump *);
158};
159
160struct Qdisc_ops {
161 struct Qdisc_ops *next;
162 const struct Qdisc_class_ops *cl_ops;
163 char id[IFNAMSIZ];
164 int priv_size;
165
166 int (*enqueue)(struct sk_buff *skb,
167 struct Qdisc *sch,
168 struct sk_buff **to_free);
169 struct sk_buff * (*dequeue)(struct Qdisc *);
170 struct sk_buff * (*peek)(struct Qdisc *);
171
172 int (*init)(struct Qdisc *, struct nlattr *arg);
173 void (*reset)(struct Qdisc *);
174 void (*destroy)(struct Qdisc *);
175 int (*change)(struct Qdisc *, struct nlattr *arg);
176 void (*attach)(struct Qdisc *);
177
178 int (*dump)(struct Qdisc *, struct sk_buff *);
179 int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
180
181 struct module *owner;
182};
183
184
185struct tcf_result {
186 unsigned long class;
187 u32 classid;
188};
189
190struct tcf_proto_ops {
191 struct list_head head;
192 char kind[IFNAMSIZ];
193
194 int (*classify)(struct sk_buff *,
195 const struct tcf_proto *,
196 struct tcf_result *);
197 int (*init)(struct tcf_proto*);
198 bool (*destroy)(struct tcf_proto*, bool);
199
200 unsigned long (*get)(struct tcf_proto*, u32 handle);
201 int (*change)(struct net *net, struct sk_buff *,
202 struct tcf_proto*, unsigned long,
203 u32 handle, struct nlattr **,
204 unsigned long *, bool);
205 int (*delete)(struct tcf_proto*, unsigned long);
206 void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
207
208
209 int (*dump)(struct net*, struct tcf_proto*, unsigned long,
210 struct sk_buff *skb, struct tcmsg*);
211
212 struct module *owner;
213};
214
215struct tcf_proto {
216
217 struct tcf_proto __rcu *next;
218 void __rcu *root;
219 int (*classify)(struct sk_buff *,
220 const struct tcf_proto *,
221 struct tcf_result *);
222 __be16 protocol;
223
224
225 u32 prio;
226 u32 classid;
227 struct Qdisc *q;
228 void *data;
229 const struct tcf_proto_ops *ops;
230 struct rcu_head rcu;
231};
232
233struct qdisc_skb_cb {
234 unsigned int pkt_len;
235 u16 slave_dev_queue_mapping;
236 u16 tc_classid;
237#define QDISC_CB_PRIV_LEN 20
238 unsigned char data[QDISC_CB_PRIV_LEN];
239};
240
241static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)
242{
243 struct qdisc_skb_cb *qcb;
244
245 BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz);
246 BUILD_BUG_ON(sizeof(qcb->data) < sz);
247}
248
249static inline int qdisc_qlen(const struct Qdisc *q)
250{
251 return q->q.qlen;
252}
253
254static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb)
255{
256 return (struct qdisc_skb_cb *)skb->cb;
257}
258
259static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc)
260{
261 return &qdisc->q.lock;
262}
263
264static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc)
265{
266 struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc);
267
268 return q;
269}
270
271static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc)
272{
273 return qdisc->dev_queue->qdisc_sleeping;
274}
275
276
277
278
279
280
281
282
283
284
285
286
287static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc)
288{
289 struct Qdisc *root = qdisc_root(qdisc);
290
291 ASSERT_RTNL();
292 return qdisc_lock(root);
293}
294
295static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc)
296{
297 struct Qdisc *root = qdisc_root_sleeping(qdisc);
298
299 ASSERT_RTNL();
300 return qdisc_lock(root);
301}
302
303static inline seqcount_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc)
304{
305 struct Qdisc *root = qdisc_root_sleeping(qdisc);
306
307 ASSERT_RTNL();
308 return &root->running;
309}
310
311static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc)
312{
313 return qdisc->dev_queue->dev;
314}
315
316static inline void sch_tree_lock(const struct Qdisc *q)
317{
318 spin_lock_bh(qdisc_root_sleeping_lock(q));
319}
320
321static inline void sch_tree_unlock(const struct Qdisc *q)
322{
323 spin_unlock_bh(qdisc_root_sleeping_lock(q));
324}
325
326#define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
327#define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
328
329extern struct Qdisc noop_qdisc;
330extern struct Qdisc_ops noop_qdisc_ops;
331extern struct Qdisc_ops pfifo_fast_ops;
332extern struct Qdisc_ops mq_qdisc_ops;
333extern struct Qdisc_ops noqueue_qdisc_ops;
334extern const struct Qdisc_ops *default_qdisc_ops;
335static inline const struct Qdisc_ops *
336get_default_qdisc_ops(const struct net_device *dev, int ntx)
337{
338 return ntx < dev->real_num_tx_queues ?
339 default_qdisc_ops : &pfifo_fast_ops;
340}
341
342struct Qdisc_class_common {
343 u32 classid;
344 struct hlist_node hnode;
345};
346
347struct Qdisc_class_hash {
348 struct hlist_head *hash;
349 unsigned int hashsize;
350 unsigned int hashmask;
351 unsigned int hashelems;
352};
353
354static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
355{
356 id ^= id >> 8;
357 id ^= id >> 4;
358 return id & mask;
359}
360
361static inline struct Qdisc_class_common *
362qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id)
363{
364 struct Qdisc_class_common *cl;
365 unsigned int h;
366
367 h = qdisc_class_hash(id, hash->hashmask);
368 hlist_for_each_entry(cl, &hash->hash[h], hnode) {
369 if (cl->classid == id)
370 return cl;
371 }
372 return NULL;
373}
374
375int qdisc_class_hash_init(struct Qdisc_class_hash *);
376void qdisc_class_hash_insert(struct Qdisc_class_hash *,
377 struct Qdisc_class_common *);
378void qdisc_class_hash_remove(struct Qdisc_class_hash *,
379 struct Qdisc_class_common *);
380void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);
381void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
382
383void dev_init_scheduler(struct net_device *dev);
384void dev_shutdown(struct net_device *dev);
385void dev_activate(struct net_device *dev);
386void dev_deactivate(struct net_device *dev);
387void dev_deactivate_many(struct list_head *head);
388struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
389 struct Qdisc *qdisc);
390void qdisc_reset(struct Qdisc *qdisc);
391void qdisc_destroy(struct Qdisc *qdisc);
392void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n,
393 unsigned int len);
394struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
395 const struct Qdisc_ops *ops);
396struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
397 const struct Qdisc_ops *ops, u32 parentid);
398void __qdisc_calculate_pkt_len(struct sk_buff *skb,
399 const struct qdisc_size_table *stab);
400bool tcf_destroy(struct tcf_proto *tp, bool force);
401void tcf_destroy_chain(struct tcf_proto __rcu **fl);
402int skb_do_redirect(struct sk_buff *);
403
404static inline bool skb_at_tc_ingress(const struct sk_buff *skb)
405{
406#ifdef CONFIG_NET_CLS_ACT
407 return G_TC_AT(skb->tc_verd) & AT_INGRESS;
408#else
409 return false;
410#endif
411}
412
413
414static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
415{
416 struct Qdisc *qdisc;
417
418 for (; i < dev->num_tx_queues; i++) {
419 qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc);
420 if (qdisc) {
421 spin_lock_bh(qdisc_lock(qdisc));
422 qdisc_reset(qdisc);
423 spin_unlock_bh(qdisc_lock(qdisc));
424 }
425 }
426}
427
428static inline void qdisc_reset_all_tx(struct net_device *dev)
429{
430 qdisc_reset_all_tx_gt(dev, 0);
431}
432
433
434static inline bool qdisc_all_tx_empty(const struct net_device *dev)
435{
436 unsigned int i;
437
438 rcu_read_lock();
439 for (i = 0; i < dev->num_tx_queues; i++) {
440 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
441 const struct Qdisc *q = rcu_dereference(txq->qdisc);
442
443 if (q->q.qlen) {
444 rcu_read_unlock();
445 return false;
446 }
447 }
448 rcu_read_unlock();
449 return true;
450}
451
452
453static inline bool qdisc_tx_changing(const struct net_device *dev)
454{
455 unsigned int i;
456
457 for (i = 0; i < dev->num_tx_queues; i++) {
458 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
459 if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping)
460 return true;
461 }
462 return false;
463}
464
465
466static inline bool qdisc_tx_is_noop(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) != &noop_qdisc)
473 return false;
474 }
475 return true;
476}
477
478static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb)
479{
480 return qdisc_skb_cb(skb)->pkt_len;
481}
482
483
484enum net_xmit_qdisc_t {
485 __NET_XMIT_STOLEN = 0x00010000,
486 __NET_XMIT_BYPASS = 0x00020000,
487};
488
489#ifdef CONFIG_NET_CLS_ACT
490#define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
491#else
492#define net_xmit_drop_count(e) (1)
493#endif
494
495static inline void qdisc_calculate_pkt_len(struct sk_buff *skb,
496 const struct Qdisc *sch)
497{
498#ifdef CONFIG_NET_SCHED
499 struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab);
500
501 if (stab)
502 __qdisc_calculate_pkt_len(skb, stab);
503#endif
504}
505
506static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch,
507 struct sk_buff **to_free)
508{
509 qdisc_calculate_pkt_len(skb, sch);
510 return sch->enqueue(skb, sch, to_free);
511}
512
513static inline bool qdisc_is_percpu_stats(const struct Qdisc *q)
514{
515 return q->flags & TCQ_F_CPUSTATS;
516}
517
518static inline void _bstats_update(struct gnet_stats_basic_packed *bstats,
519 __u64 bytes, __u32 packets)
520{
521 bstats->bytes += bytes;
522 bstats->packets += packets;
523}
524
525static inline void bstats_update(struct gnet_stats_basic_packed *bstats,
526 const struct sk_buff *skb)
527{
528 _bstats_update(bstats,
529 qdisc_pkt_len(skb),
530 skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1);
531}
532
533static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu *bstats,
534 __u64 bytes, __u32 packets)
535{
536 u64_stats_update_begin(&bstats->syncp);
537 _bstats_update(&bstats->bstats, bytes, packets);
538 u64_stats_update_end(&bstats->syncp);
539}
540
541static inline void bstats_cpu_update(struct gnet_stats_basic_cpu *bstats,
542 const struct sk_buff *skb)
543{
544 u64_stats_update_begin(&bstats->syncp);
545 bstats_update(&bstats->bstats, skb);
546 u64_stats_update_end(&bstats->syncp);
547}
548
549static inline void qdisc_bstats_cpu_update(struct Qdisc *sch,
550 const struct sk_buff *skb)
551{
552 bstats_cpu_update(this_cpu_ptr(sch->cpu_bstats), skb);
553}
554
555static inline void qdisc_bstats_update(struct Qdisc *sch,
556 const struct sk_buff *skb)
557{
558 bstats_update(&sch->bstats, skb);
559}
560
561static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch,
562 const struct sk_buff *skb)
563{
564 sch->qstats.backlog -= qdisc_pkt_len(skb);
565}
566
567static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch,
568 const struct sk_buff *skb)
569{
570 sch->qstats.backlog += qdisc_pkt_len(skb);
571}
572
573static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count)
574{
575 sch->qstats.drops += count;
576}
577
578static inline void qstats_drop_inc(struct gnet_stats_queue *qstats)
579{
580 qstats->drops++;
581}
582
583static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats)
584{
585 qstats->overlimits++;
586}
587
588static inline void qdisc_qstats_drop(struct Qdisc *sch)
589{
590 qstats_drop_inc(&sch->qstats);
591}
592
593static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch)
594{
595 qstats_drop_inc(this_cpu_ptr(sch->cpu_qstats));
596}
597
598static inline void qdisc_qstats_overlimit(struct Qdisc *sch)
599{
600 sch->qstats.overlimits++;
601}
602
603static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
604 struct sk_buff_head *list)
605{
606 __skb_queue_tail(list, skb);
607 qdisc_qstats_backlog_inc(sch, skb);
608
609 return NET_XMIT_SUCCESS;
610}
611
612static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
613{
614 return __qdisc_enqueue_tail(skb, sch, &sch->q);
615}
616
617static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch,
618 struct sk_buff_head *list)
619{
620 struct sk_buff *skb = __skb_dequeue(list);
621
622 if (likely(skb != NULL)) {
623 qdisc_qstats_backlog_dec(sch, skb);
624 qdisc_bstats_update(sch, skb);
625 }
626
627 return skb;
628}
629
630static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
631{
632 return __qdisc_dequeue_head(sch, &sch->q);
633}
634
635
636
637
638static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free)
639{
640 skb->next = *to_free;
641 *to_free = skb;
642}
643
644static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
645 struct sk_buff_head *list,
646 struct sk_buff **to_free)
647{
648 struct sk_buff *skb = __skb_dequeue(list);
649
650 if (likely(skb != NULL)) {
651 unsigned int len = qdisc_pkt_len(skb);
652
653 qdisc_qstats_backlog_dec(sch, skb);
654 __qdisc_drop(skb, to_free);
655 return len;
656 }
657
658 return 0;
659}
660
661static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch,
662 struct sk_buff **to_free)
663{
664 return __qdisc_queue_drop_head(sch, &sch->q, to_free);
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 qdisc_qstats_backlog_inc(sch, sch->gso_skb);
681 sch->q.qlen++;
682 }
683 }
684
685 return sch->gso_skb;
686}
687
688
689static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch)
690{
691 struct sk_buff *skb = sch->gso_skb;
692
693 if (skb) {
694 sch->gso_skb = NULL;
695 qdisc_qstats_backlog_dec(sch, skb);
696 sch->q.qlen--;
697 } else {
698 skb = sch->dequeue(sch);
699 }
700
701 return skb;
702}
703
704static inline void __qdisc_reset_queue(struct sk_buff_head *list)
705{
706
707
708
709
710 if (!skb_queue_empty(list)) {
711 rtnl_kfree_skbs(list->next, list->prev);
712 __skb_queue_head_init(list);
713 }
714}
715
716static inline void qdisc_reset_queue(struct Qdisc *sch)
717{
718 __qdisc_reset_queue(&sch->q);
719 sch->qstats.backlog = 0;
720}
721
722static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new,
723 struct Qdisc **pold)
724{
725 struct Qdisc *old;
726
727 sch_tree_lock(sch);
728 old = *pold;
729 *pold = new;
730 if (old != NULL) {
731 qdisc_tree_reduce_backlog(old, old->q.qlen, old->qstats.backlog);
732 qdisc_reset(old);
733 }
734 sch_tree_unlock(sch);
735
736 return old;
737}
738
739static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
740{
741 rtnl_kfree_skbs(skb, skb);
742 qdisc_qstats_drop(sch);
743}
744
745
746static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch,
747 struct sk_buff **to_free)
748{
749 __qdisc_drop(skb, to_free);
750 qdisc_qstats_drop(sch);
751
752 return NET_XMIT_DROP;
753}
754
755
756
757
758static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
759{
760 int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
761 if (slot < 0)
762 slot = 0;
763 slot >>= rtab->rate.cell_log;
764 if (slot > 255)
765 return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF];
766 return rtab->data[slot];
767}
768
769struct psched_ratecfg {
770 u64 rate_bytes_ps;
771 u32 mult;
772 u16 overhead;
773 u8 linklayer;
774 u8 shift;
775};
776
777static inline u64 psched_l2t_ns(const struct psched_ratecfg *r,
778 unsigned int len)
779{
780 len += r->overhead;
781
782 if (unlikely(r->linklayer == TC_LINKLAYER_ATM))
783 return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift;
784
785 return ((u64)len * r->mult) >> r->shift;
786}
787
788void psched_ratecfg_precompute(struct psched_ratecfg *r,
789 const struct tc_ratespec *conf,
790 u64 rate64);
791
792static inline void psched_ratecfg_getrate(struct tc_ratespec *res,
793 const struct psched_ratecfg *r)
794{
795 memset(res, 0, sizeof(*res));
796
797
798
799
800
801 res->rate = min_t(u64, r->rate_bytes_ps, ~0U);
802
803 res->overhead = r->overhead;
804 res->linklayer = (r->linklayer & TC_LINKLAYER_MASK);
805}
806
807#endif
808