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Merge tag 'sound-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
[linux-2.6.git] / include / net / sch_generic.h
blobf4eb365f7dcdadbab70e60940c519e3f83ea3253
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 <net/gen_stats.h>
10 #include <net/rtnetlink.h>
11
12 struct Qdisc_ops;
13 struct qdisc_walker;
14 struct tcf_walker;
15 struct module;
16
17 struct qdisc_rate_table {
18 struct tc_ratespec rate;
19 u32 data[256];
20 struct qdisc_rate_table *next;
21 int refcnt;
22 };
23
24 enum qdisc_state_t {
25 __QDISC_STATE_SCHED,
26 __QDISC_STATE_DEACTIVATED,
27 __QDISC_STATE_THROTTLED,
28 };
29
30 /*
31 * following bits are only changed while qdisc lock is held
32 */
33 enum qdisc___state_t {
34 __QDISC___STATE_RUNNING = 1,
35 };
36
37 struct qdisc_size_table {
38 struct rcu_head rcu;
39 struct list_head list;
40 struct tc_sizespec szopts;
41 int refcnt;
42 u16 data[];
43 };
44
45 struct Qdisc {
46 int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev);
47 struct sk_buff * (*dequeue)(struct Qdisc *dev);
48 unsigned int flags;
49 #define TCQ_F_BUILTIN 1
50 #define TCQ_F_INGRESS 2
51 #define TCQ_F_CAN_BYPASS 4
52 #define TCQ_F_MQROOT 8
53 #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for
54 * q->dev_queue : It can test
55 * netif_xmit_frozen_or_stopped() before
56 * dequeueing next packet.
57 * Its true for MQ/MQPRIO slaves, or non
58 * multiqueue device.
59 */
60 #define TCQ_F_WARN_NONWC (1 << 16)
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 int (*reshape_fail)(struct sk_buff *skb,
68 struct Qdisc *q);
69
70 void *u32_node;
71
72 /* This field is deprecated, but it is still used by CBQ
73 * and it will live until better solution will be invented.
74 */
75 struct Qdisc *__parent;
76 struct netdev_queue *dev_queue;
77
78 struct gnet_stats_rate_est64 rate_est;
79 struct Qdisc *next_sched;
80 struct sk_buff *gso_skb;
81 /*
82 * For performance sake on SMP, we put highly modified fields at the end
83 */
84 unsigned long state;
85 struct sk_buff_head q;
86 struct gnet_stats_basic_packed bstats;
87 unsigned int __state;
88 struct gnet_stats_queue qstats;
89 struct rcu_head rcu_head;
90 int padded;
91 atomic_t refcnt;
92
93 spinlock_t busylock ____cacheline_aligned_in_smp;
94 };
95
96 static inline bool qdisc_is_running(const struct Qdisc *qdisc)
97 {
98 return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false;
99 }
100
101 static inline bool qdisc_run_begin(struct Qdisc *qdisc)
102 {
103 if (qdisc_is_running(qdisc))
104 return false;
105 qdisc->__state |= __QDISC___STATE_RUNNING;
106 return true;
107 }
108
109 static inline void qdisc_run_end(struct Qdisc *qdisc)
110 {
111 qdisc->__state &= ~__QDISC___STATE_RUNNING;
112 }
113
114 static inline bool qdisc_is_throttled(const struct Qdisc *qdisc)
115 {
116 return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false;
117 }
118
119 static inline void qdisc_throttled(struct Qdisc *qdisc)
120 {
121 set_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
122 }
123
124 static inline void qdisc_unthrottled(struct Qdisc *qdisc)
125 {
126 clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state);
127 }
128
129 struct Qdisc_class_ops {
130 /* Child qdisc manipulation */
131 struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *);
132 int (*graft)(struct Qdisc *, unsigned long cl,
133 struct Qdisc *, struct Qdisc **);
134 struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl);
135 void (*qlen_notify)(struct Qdisc *, unsigned long);
136
137 /* Class manipulation routines */
138 unsigned long (*get)(struct Qdisc *, u32 classid);
139 void (*put)(struct Qdisc *, unsigned long);
140 int (*change)(struct Qdisc *, u32, u32,
141 struct nlattr **, unsigned long *);
142 int (*delete)(struct Qdisc *, unsigned long);
143 void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
144
145 /* Filter manipulation */
146 struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long);
147 unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
148 u32 classid);
149 void (*unbind_tcf)(struct Qdisc *, unsigned long);
150
151 /* rtnetlink specific */
152 int (*dump)(struct Qdisc *, unsigned long,
153 struct sk_buff *skb, struct tcmsg*);
154 int (*dump_stats)(struct Qdisc *, unsigned long,
155 struct gnet_dump *);
156 };
157
158 struct Qdisc_ops {
159 struct Qdisc_ops *next;
160 const struct Qdisc_class_ops *cl_ops;
161 char id[IFNAMSIZ];
162 int priv_size;
163
164 int (*enqueue)(struct sk_buff *, struct Qdisc *);
165 struct sk_buff * (*dequeue)(struct Qdisc *);
166 struct sk_buff * (*peek)(struct Qdisc *);
167 unsigned int (*drop)(struct Qdisc *);
168
169 int (*init)(struct Qdisc *, struct nlattr *arg);
170 void (*reset)(struct Qdisc *);
171 void (*destroy)(struct Qdisc *);
172 int (*change)(struct Qdisc *, struct nlattr *arg);
173 void (*attach)(struct Qdisc *);
174
175 int (*dump)(struct Qdisc *, struct sk_buff *);
176 int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
177
178 struct module *owner;
179 };
180
181
182 struct tcf_result {
183 unsigned long class;
184 u32 classid;
185 };
186
187 struct tcf_proto_ops {
188 struct tcf_proto_ops *next;
189 char kind[IFNAMSIZ];
190
191 int (*classify)(struct sk_buff *,
192 const struct tcf_proto *,
193 struct tcf_result *);
194 int (*init)(struct tcf_proto*);
195 void (*destroy)(struct tcf_proto*);
196
197 unsigned long (*get)(struct tcf_proto*, u32 handle);
198 void (*put)(struct tcf_proto*, unsigned long);
199 int (*change)(struct net *net, struct sk_buff *,
200 struct tcf_proto*, unsigned long,
201 u32 handle, struct nlattr **,
202 unsigned long *);
203 int (*delete)(struct tcf_proto*, unsigned long);
204 void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
205
206 /* rtnetlink specific */
207 int (*dump)(struct tcf_proto*, unsigned long,
208 struct sk_buff *skb, struct tcmsg*);
209
210 struct module *owner;
211 };
212
213 struct tcf_proto {
214 /* Fast access part */
215 struct tcf_proto *next;
216 void *root;
217 int (*classify)(struct sk_buff *,
218 const struct tcf_proto *,
219 struct tcf_result *);
220 __be16 protocol;
221
222 /* All the rest */
223 u32 prio;
224 u32 classid;
225 struct Qdisc *q;
226 void *data;
227 const struct tcf_proto_ops *ops;
228 };
229
230 struct qdisc_skb_cb {
231 unsigned int pkt_len;
232 u16 slave_dev_queue_mapping;
233 u16 _pad;
234 unsigned char data[20];
235 };
236
237 static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)
238 {
239 struct qdisc_skb_cb *qcb;
240
241 BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz);
242 BUILD_BUG_ON(sizeof(qcb->data) < sz);
243 }
244
245 static inline int qdisc_qlen(const struct Qdisc *q)
246 {
247 return q->q.qlen;
248 }
249
250 static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb)
251 {
252 return (struct qdisc_skb_cb *)skb->cb;
253 }
254
255 static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc)
256 {
257 return &qdisc->q.lock;
258 }
259
260 static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc)
261 {
262 return qdisc->dev_queue->qdisc;
263 }
264
265 static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc)
266 {
267 return qdisc->dev_queue->qdisc_sleeping;
268 }
269
270 /* The qdisc root lock is a mechanism by which to top level
271 * of a qdisc tree can be locked from any qdisc node in the
272 * forest. This allows changing the configuration of some
273 * aspect of the qdisc tree while blocking out asynchronous
274 * qdisc access in the packet processing paths.
275 *
276 * It is only legal to do this when the root will not change
277 * on us. Otherwise we'll potentially lock the wrong qdisc
278 * root. This is enforced by holding the RTNL semaphore, which
279 * all users of this lock accessor must do.
280 */
281 static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc)
282 {
283 struct Qdisc *root = qdisc_root(qdisc);
284
285 ASSERT_RTNL();
286 return qdisc_lock(root);
287 }
288
289 static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc)
290 {
291 struct Qdisc *root = qdisc_root_sleeping(qdisc);
292
293 ASSERT_RTNL();
294 return qdisc_lock(root);
295 }
296
297 static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc)
298 {
299 return qdisc->dev_queue->dev;
300 }
301
302 static inline void sch_tree_lock(const struct Qdisc *q)
303 {
304 spin_lock_bh(qdisc_root_sleeping_lock(q));
305 }
306
307 static inline void sch_tree_unlock(const struct Qdisc *q)
308 {
309 spin_unlock_bh(qdisc_root_sleeping_lock(q));
310 }
311
312 #define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
313 #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
314
315 extern struct Qdisc noop_qdisc;
316 extern struct Qdisc_ops noop_qdisc_ops;
317 extern struct Qdisc_ops pfifo_fast_ops;
318 extern struct Qdisc_ops mq_qdisc_ops;
319 extern const struct Qdisc_ops *default_qdisc_ops;
320
321 struct Qdisc_class_common {
322 u32 classid;
323 struct hlist_node hnode;
324 };
325
326 struct Qdisc_class_hash {
327 struct hlist_head *hash;
328 unsigned int hashsize;
329 unsigned int hashmask;
330 unsigned int hashelems;
331 };
332
333 static inline unsigned int qdisc_class_hash(u32 id, u32 mask)
334 {
335 id ^= id >> 8;
336 id ^= id >> 4;
337 return id & mask;
338 }
339
340 static inline struct Qdisc_class_common *
341 qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id)
342 {
343 struct Qdisc_class_common *cl;
344 unsigned int h;
345
346 h = qdisc_class_hash(id, hash->hashmask);
347 hlist_for_each_entry(cl, &hash->hash[h], hnode) {
348 if (cl->classid == id)
349 return cl;
350 }
351 return NULL;
352 }
353
354 int qdisc_class_hash_init(struct Qdisc_class_hash *);
355 void qdisc_class_hash_insert(struct Qdisc_class_hash *,
356 struct Qdisc_class_common *);
357 void qdisc_class_hash_remove(struct Qdisc_class_hash *,
358 struct Qdisc_class_common *);
359 void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);
360 void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
361
362 void dev_init_scheduler(struct net_device *dev);
363 void dev_shutdown(struct net_device *dev);
364 void dev_activate(struct net_device *dev);
365 void dev_deactivate(struct net_device *dev);
366 void dev_deactivate_many(struct list_head *head);
367 struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
368 struct Qdisc *qdisc);
369 void qdisc_reset(struct Qdisc *qdisc);
370 void qdisc_destroy(struct Qdisc *qdisc);
371 void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n);
372 struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
373 const struct Qdisc_ops *ops);
374 struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue,
375 const struct Qdisc_ops *ops, u32 parentid);
376 void __qdisc_calculate_pkt_len(struct sk_buff *skb,
377 const struct qdisc_size_table *stab);
378 void tcf_destroy(struct tcf_proto *tp);
379 void tcf_destroy_chain(struct tcf_proto **fl);
380
381 /* Reset all TX qdiscs greater then index of a device. */
382 static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i)
383 {
384 struct Qdisc *qdisc;
385
386 for (; i < dev->num_tx_queues; i++) {
387 qdisc = netdev_get_tx_queue(dev, i)->qdisc;
388 if (qdisc) {
389 spin_lock_bh(qdisc_lock(qdisc));
390 qdisc_reset(qdisc);
391 spin_unlock_bh(qdisc_lock(qdisc));
392 }
393 }
394 }
395
396 static inline void qdisc_reset_all_tx(struct net_device *dev)
397 {
398 qdisc_reset_all_tx_gt(dev, 0);
399 }
400
401 /* Are all TX queues of the device empty? */
402 static inline bool qdisc_all_tx_empty(const struct net_device *dev)
403 {
404 unsigned int i;
405 for (i = 0; i < dev->num_tx_queues; i++) {
406 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
407 const struct Qdisc *q = txq->qdisc;
408
409 if (q->q.qlen)
410 return false;
411 }
412 return true;
413 }
414
415 /* Are any of the TX qdiscs changing? */
416 static inline bool qdisc_tx_changing(const struct net_device *dev)
417 {
418 unsigned int i;
419 for (i = 0; i < dev->num_tx_queues; i++) {
420 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
421 if (txq->qdisc != txq->qdisc_sleeping)
422 return true;
423 }
424 return false;
425 }
426
427 /* Is the device using the noop qdisc on all queues? */
428 static inline bool qdisc_tx_is_noop(const struct net_device *dev)
429 {
430 unsigned int i;
431 for (i = 0; i < dev->num_tx_queues; i++) {
432 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
433 if (txq->qdisc != &noop_qdisc)
434 return false;
435 }
436 return true;
437 }
438
439 static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb)
440 {
441 return qdisc_skb_cb(skb)->pkt_len;
442 }
443
444 /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
445 enum net_xmit_qdisc_t {
446 __NET_XMIT_STOLEN = 0x00010000,
447 __NET_XMIT_BYPASS = 0x00020000,
448 };
449
450 #ifdef CONFIG_NET_CLS_ACT
451 #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
452 #else
453 #define net_xmit_drop_count(e) (1)
454 #endif
455
456 static inline void qdisc_calculate_pkt_len(struct sk_buff *skb,
457 const struct Qdisc *sch)
458 {
459 #ifdef CONFIG_NET_SCHED
460 struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab);
461
462 if (stab)
463 __qdisc_calculate_pkt_len(skb, stab);
464 #endif
465 }
466
467 static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
468 {
469 qdisc_calculate_pkt_len(skb, sch);
470 return sch->enqueue(skb, sch);
471 }
472
473 static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch)
474 {
475 qdisc_skb_cb(skb)->pkt_len = skb->len;
476 return qdisc_enqueue(skb, sch) & NET_XMIT_MASK;
477 }
478
479
480 static inline void bstats_update(struct gnet_stats_basic_packed *bstats,
481 const struct sk_buff *skb)
482 {
483 bstats->bytes += qdisc_pkt_len(skb);
484 bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
485 }
486
487 static inline void qdisc_bstats_update(struct Qdisc *sch,
488 const struct sk_buff *skb)
489 {
490 bstats_update(&sch->bstats, skb);
491 }
492
493 static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
494 struct sk_buff_head *list)
495 {
496 __skb_queue_tail(list, skb);
497 sch->qstats.backlog += qdisc_pkt_len(skb);
498
499 return NET_XMIT_SUCCESS;
500 }
501
502 static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
503 {
504 return __qdisc_enqueue_tail(skb, sch, &sch->q);
505 }
506
507 static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch,
508 struct sk_buff_head *list)
509 {
510 struct sk_buff *skb = __skb_dequeue(list);
511
512 if (likely(skb != NULL)) {
513 sch->qstats.backlog -= qdisc_pkt_len(skb);
514 qdisc_bstats_update(sch, skb);
515 }
516
517 return skb;
518 }
519
520 static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
521 {
522 return __qdisc_dequeue_head(sch, &sch->q);
523 }
524
525 static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
526 struct sk_buff_head *list)
527 {
528 struct sk_buff *skb = __skb_dequeue(list);
529
530 if (likely(skb != NULL)) {
531 unsigned int len = qdisc_pkt_len(skb);
532 sch->qstats.backlog -= len;
533 kfree_skb(skb);
534 return len;
535 }
536
537 return 0;
538 }
539
540 static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch)
541 {
542 return __qdisc_queue_drop_head(sch, &sch->q);
543 }
544
545 static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch,
546 struct sk_buff_head *list)
547 {
548 struct sk_buff *skb = __skb_dequeue_tail(list);
549
550 if (likely(skb != NULL))
551 sch->qstats.backlog -= qdisc_pkt_len(skb);
552
553 return skb;
554 }
555
556 static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch)
557 {
558 return __qdisc_dequeue_tail(sch, &sch->q);
559 }
560
561 static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch)
562 {
563 return skb_peek(&sch->q);
564 }
565
566 /* generic pseudo peek method for non-work-conserving qdisc */
567 static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch)
568 {
569 /* we can reuse ->gso_skb because peek isn't called for root qdiscs */
570 if (!sch->gso_skb) {
571 sch->gso_skb = sch->dequeue(sch);
572 if (sch->gso_skb)
573 /* it's still part of the queue */
574 sch->q.qlen++;
575 }
576
577 return sch->gso_skb;
578 }
579
580 /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
581 static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch)
582 {
583 struct sk_buff *skb = sch->gso_skb;
584
585 if (skb) {
586 sch->gso_skb = NULL;
587 sch->q.qlen--;
588 } else {
589 skb = sch->dequeue(sch);
590 }
591
592 return skb;
593 }
594
595 static inline void __qdisc_reset_queue(struct Qdisc *sch,
596 struct sk_buff_head *list)
597 {
598 /*
599 * We do not know the backlog in bytes of this list, it
600 * is up to the caller to correct it
601 */
602 __skb_queue_purge(list);
603 }
604
605 static inline void qdisc_reset_queue(struct Qdisc *sch)
606 {
607 __qdisc_reset_queue(sch, &sch->q);
608 sch->qstats.backlog = 0;
609 }
610
611 static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
612 struct sk_buff_head *list)
613 {
614 struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
615
616 if (likely(skb != NULL)) {
617 unsigned int len = qdisc_pkt_len(skb);
618 kfree_skb(skb);
619 return len;
620 }
621
622 return 0;
623 }
624
625 static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
626 {
627 return __qdisc_queue_drop(sch, &sch->q);
628 }
629
630 static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
631 {
632 kfree_skb(skb);
633 sch->qstats.drops++;
634
635 return NET_XMIT_DROP;
636 }
637
638 static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch)
639 {
640 sch->qstats.drops++;
641
642 #ifdef CONFIG_NET_CLS_ACT
643 if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch))
644 goto drop;
645
646 return NET_XMIT_SUCCESS;
647
648 drop:
649 #endif
650 kfree_skb(skb);
651 return NET_XMIT_DROP;
652 }
653
654 /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
655 long it will take to send a packet given its size.
656 */
657 static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen)
658 {
659 int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead;
660 if (slot < 0)
661 slot = 0;
662 slot >>= rtab->rate.cell_log;
663 if (slot > 255)
664 return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF];
665 return rtab->data[slot];
666 }
667
668 #ifdef CONFIG_NET_CLS_ACT
669 static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask,
670 int action)
671 {
672 struct sk_buff *n;
673
674 n = skb_clone(skb, gfp_mask);
675
676 if (n) {
677 n->tc_verd = SET_TC_VERD(n->tc_verd, 0);
678 n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
679 n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
680 }
681 return n;
682 }
683 #endif
684
685 struct psched_ratecfg {
686 u64 rate_bytes_ps; /* bytes per second */
687 u32 mult;
688 u16 overhead;
689 u8 linklayer;
690 u8 shift;
691 };
692
693 static inline u64 psched_l2t_ns(const struct psched_ratecfg *r,
694 unsigned int len)
695 {
696 len += r->overhead;
697
698 if (unlikely(r->linklayer == TC_LINKLAYER_ATM))
699 return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift;
700
701 return ((u64)len * r->mult) >> r->shift;
702 }
703
704 void psched_ratecfg_precompute(struct psched_ratecfg *r,
705 const struct tc_ratespec *conf);
706
707 static inline void psched_ratecfg_getrate(struct tc_ratespec *res,
708 const struct psched_ratecfg *r)
709 {
710 memset(res, 0, sizeof(*res));
711 res->rate = r->rate_bytes_ps;
712 res->overhead = r->overhead;
713 res->linklayer = (r->linklayer & TC_LINKLAYER_MASK);
714 }
715
716 #endif
Linus' kernel tree