1 #ifndef __NET_SCHED_GENERIC_H
2 #define __NET_SCHED_GENERIC_H
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>
19 struct qdisc_rate_table
{
20 struct tc_ratespec rate
;
22 struct qdisc_rate_table
*next
;
28 __QDISC_STATE_DEACTIVATED
,
31 struct qdisc_size_table
{
33 struct list_head list
;
34 struct tc_sizespec szopts
;
39 /* similar to sk_buff_head, but skb->prev pointer is undefined. */
40 struct qdisc_skb_head
{
48 int (*enqueue
)(struct sk_buff
*skb
,
50 struct sk_buff
**to_free
);
51 struct sk_buff
* (*dequeue
)(struct Qdisc
*sch
);
53 #define TCQ_F_BUILTIN 1
54 #define TCQ_F_INGRESS 2
55 #define TCQ_F_CAN_BYPASS 4
56 #define TCQ_F_MQROOT 8
57 #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for
58 * q->dev_queue : It can test
59 * netif_xmit_frozen_or_stopped() before
60 * dequeueing next packet.
61 * Its true for MQ/MQPRIO slaves, or non
64 #define TCQ_F_WARN_NONWC (1 << 16)
65 #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */
66 #define TCQ_F_NOPARENT 0x40 /* root of its hierarchy :
67 * qdisc_tree_decrease_qlen() should stop.
69 #define TCQ_F_INVISIBLE 0x80 /* invisible by default in dump */
71 const struct Qdisc_ops
*ops
;
72 struct qdisc_size_table __rcu
*stab
;
73 struct hlist_node hash
;
78 struct netdev_queue
*dev_queue
;
80 struct net_rate_estimator __rcu
*rate_est
;
81 struct gnet_stats_basic_cpu __percpu
*cpu_bstats
;
82 struct gnet_stats_queue __percpu
*cpu_qstats
;
85 * For performance sake on SMP, we put highly modified fields at the end
87 struct sk_buff
*gso_skb ____cacheline_aligned_in_smp
;
88 struct qdisc_skb_head q
;
89 struct gnet_stats_basic_packed bstats
;
91 struct gnet_stats_queue qstats
;
93 struct Qdisc
*next_sched
;
94 struct sk_buff
*skb_bad_txq
;
95 struct rcu_head rcu_head
;
99 spinlock_t busylock ____cacheline_aligned_in_smp
;
102 static inline bool qdisc_is_running(const struct Qdisc
*qdisc
)
104 return (raw_read_seqcount(&qdisc
->running
) & 1) ? true : false;
107 static inline bool qdisc_run_begin(struct Qdisc
*qdisc
)
109 if (qdisc_is_running(qdisc
))
111 /* Variant of write_seqcount_begin() telling lockdep a trylock
114 raw_write_seqcount_begin(&qdisc
->running
);
115 seqcount_acquire(&qdisc
->running
.dep_map
, 0, 1, _RET_IP_
);
119 static inline void qdisc_run_end(struct Qdisc
*qdisc
)
121 write_seqcount_end(&qdisc
->running
);
124 static inline bool qdisc_may_bulk(const struct Qdisc
*qdisc
)
126 return qdisc
->flags
& TCQ_F_ONETXQUEUE
;
129 static inline int qdisc_avail_bulklimit(const struct netdev_queue
*txq
)
132 /* Non-BQL migrated drivers will return 0, too. */
133 return dql_avail(&txq
->dql
);
139 struct Qdisc_class_ops
{
140 /* Child qdisc manipulation */
141 struct netdev_queue
* (*select_queue
)(struct Qdisc
*, struct tcmsg
*);
142 int (*graft
)(struct Qdisc
*, unsigned long cl
,
143 struct Qdisc
*, struct Qdisc
**);
144 struct Qdisc
* (*leaf
)(struct Qdisc
*, unsigned long cl
);
145 void (*qlen_notify
)(struct Qdisc
*, unsigned long);
147 /* Class manipulation routines */
148 unsigned long (*get
)(struct Qdisc
*, u32 classid
);
149 void (*put
)(struct Qdisc
*, unsigned long);
150 int (*change
)(struct Qdisc
*, u32
, u32
,
151 struct nlattr
**, unsigned long *);
152 int (*delete)(struct Qdisc
*, unsigned long);
153 void (*walk
)(struct Qdisc
*, struct qdisc_walker
* arg
);
155 /* Filter manipulation */
156 struct tcf_proto __rcu
** (*tcf_chain
)(struct Qdisc
*, unsigned long);
157 bool (*tcf_cl_offload
)(u32 classid
);
158 unsigned long (*bind_tcf
)(struct Qdisc
*, unsigned long,
160 void (*unbind_tcf
)(struct Qdisc
*, unsigned long);
162 /* rtnetlink specific */
163 int (*dump
)(struct Qdisc
*, unsigned long,
164 struct sk_buff
*skb
, struct tcmsg
*);
165 int (*dump_stats
)(struct Qdisc
*, unsigned long,
170 struct Qdisc_ops
*next
;
171 const struct Qdisc_class_ops
*cl_ops
;
175 int (*enqueue
)(struct sk_buff
*skb
,
177 struct sk_buff
**to_free
);
178 struct sk_buff
* (*dequeue
)(struct Qdisc
*);
179 struct sk_buff
* (*peek
)(struct Qdisc
*);
181 int (*init
)(struct Qdisc
*, struct nlattr
*arg
);
182 void (*reset
)(struct Qdisc
*);
183 void (*destroy
)(struct Qdisc
*);
184 int (*change
)(struct Qdisc
*, struct nlattr
*arg
);
185 void (*attach
)(struct Qdisc
*);
187 int (*dump
)(struct Qdisc
*, struct sk_buff
*);
188 int (*dump_stats
)(struct Qdisc
*, struct gnet_dump
*);
190 struct module
*owner
;
199 struct tcf_proto_ops
{
200 struct list_head head
;
203 int (*classify
)(struct sk_buff
*,
204 const struct tcf_proto
*,
205 struct tcf_result
*);
206 int (*init
)(struct tcf_proto
*);
207 void (*destroy
)(struct tcf_proto
*);
209 unsigned long (*get
)(struct tcf_proto
*, u32 handle
);
210 int (*change
)(struct net
*net
, struct sk_buff
*,
211 struct tcf_proto
*, unsigned long,
212 u32 handle
, struct nlattr
**,
213 unsigned long *, bool);
214 int (*delete)(struct tcf_proto
*, unsigned long, bool*);
215 void (*walk
)(struct tcf_proto
*, struct tcf_walker
*arg
);
217 /* rtnetlink specific */
218 int (*dump
)(struct net
*, struct tcf_proto
*, unsigned long,
219 struct sk_buff
*skb
, struct tcmsg
*);
221 struct module
*owner
;
225 /* Fast access part */
226 struct tcf_proto __rcu
*next
;
228 int (*classify
)(struct sk_buff
*,
229 const struct tcf_proto
*,
230 struct tcf_result
*);
238 const struct tcf_proto_ops
*ops
;
242 struct qdisc_skb_cb
{
243 unsigned int pkt_len
;
244 u16 slave_dev_queue_mapping
;
246 #define QDISC_CB_PRIV_LEN 20
247 unsigned char data
[QDISC_CB_PRIV_LEN
];
250 static inline void qdisc_cb_private_validate(const struct sk_buff
*skb
, int sz
)
252 struct qdisc_skb_cb
*qcb
;
254 BUILD_BUG_ON(sizeof(skb
->cb
) < offsetof(struct qdisc_skb_cb
, data
) + sz
);
255 BUILD_BUG_ON(sizeof(qcb
->data
) < sz
);
258 static inline int qdisc_qlen(const struct Qdisc
*q
)
263 static inline struct qdisc_skb_cb
*qdisc_skb_cb(const struct sk_buff
*skb
)
265 return (struct qdisc_skb_cb
*)skb
->cb
;
268 static inline spinlock_t
*qdisc_lock(struct Qdisc
*qdisc
)
270 return &qdisc
->q
.lock
;
273 static inline struct Qdisc
*qdisc_root(const struct Qdisc
*qdisc
)
275 struct Qdisc
*q
= rcu_dereference_rtnl(qdisc
->dev_queue
->qdisc
);
280 static inline struct Qdisc
*qdisc_root_sleeping(const struct Qdisc
*qdisc
)
282 return qdisc
->dev_queue
->qdisc_sleeping
;
285 /* The qdisc root lock is a mechanism by which to top level
286 * of a qdisc tree can be locked from any qdisc node in the
287 * forest. This allows changing the configuration of some
288 * aspect of the qdisc tree while blocking out asynchronous
289 * qdisc access in the packet processing paths.
291 * It is only legal to do this when the root will not change
292 * on us. Otherwise we'll potentially lock the wrong qdisc
293 * root. This is enforced by holding the RTNL semaphore, which
294 * all users of this lock accessor must do.
296 static inline spinlock_t
*qdisc_root_lock(const struct Qdisc
*qdisc
)
298 struct Qdisc
*root
= qdisc_root(qdisc
);
301 return qdisc_lock(root
);
304 static inline spinlock_t
*qdisc_root_sleeping_lock(const struct Qdisc
*qdisc
)
306 struct Qdisc
*root
= qdisc_root_sleeping(qdisc
);
309 return qdisc_lock(root
);
312 static inline seqcount_t
*qdisc_root_sleeping_running(const struct Qdisc
*qdisc
)
314 struct Qdisc
*root
= qdisc_root_sleeping(qdisc
);
317 return &root
->running
;
320 static inline struct net_device
*qdisc_dev(const struct Qdisc
*qdisc
)
322 return qdisc
->dev_queue
->dev
;
325 static inline void sch_tree_lock(const struct Qdisc
*q
)
327 spin_lock_bh(qdisc_root_sleeping_lock(q
));
330 static inline void sch_tree_unlock(const struct Qdisc
*q
)
332 spin_unlock_bh(qdisc_root_sleeping_lock(q
));
335 #define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
336 #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
338 extern struct Qdisc noop_qdisc
;
339 extern struct Qdisc_ops noop_qdisc_ops
;
340 extern struct Qdisc_ops pfifo_fast_ops
;
341 extern struct Qdisc_ops mq_qdisc_ops
;
342 extern struct Qdisc_ops noqueue_qdisc_ops
;
343 extern const struct Qdisc_ops
*default_qdisc_ops
;
344 static inline const struct Qdisc_ops
*
345 get_default_qdisc_ops(const struct net_device
*dev
, int ntx
)
347 return ntx
< dev
->real_num_tx_queues
?
348 default_qdisc_ops
: &pfifo_fast_ops
;
351 struct Qdisc_class_common
{
353 struct hlist_node hnode
;
356 struct Qdisc_class_hash
{
357 struct hlist_head
*hash
;
358 unsigned int hashsize
;
359 unsigned int hashmask
;
360 unsigned int hashelems
;
363 static inline unsigned int qdisc_class_hash(u32 id
, u32 mask
)
370 static inline struct Qdisc_class_common
*
371 qdisc_class_find(const struct Qdisc_class_hash
*hash
, u32 id
)
373 struct Qdisc_class_common
*cl
;
376 h
= qdisc_class_hash(id
, hash
->hashmask
);
377 hlist_for_each_entry(cl
, &hash
->hash
[h
], hnode
) {
378 if (cl
->classid
== id
)
384 int qdisc_class_hash_init(struct Qdisc_class_hash
*);
385 void qdisc_class_hash_insert(struct Qdisc_class_hash
*,
386 struct Qdisc_class_common
*);
387 void qdisc_class_hash_remove(struct Qdisc_class_hash
*,
388 struct Qdisc_class_common
*);
389 void qdisc_class_hash_grow(struct Qdisc
*, struct Qdisc_class_hash
*);
390 void qdisc_class_hash_destroy(struct Qdisc_class_hash
*);
392 void dev_init_scheduler(struct net_device
*dev
);
393 void dev_shutdown(struct net_device
*dev
);
394 void dev_activate(struct net_device
*dev
);
395 void dev_deactivate(struct net_device
*dev
);
396 void dev_deactivate_many(struct list_head
*head
);
397 struct Qdisc
*dev_graft_qdisc(struct netdev_queue
*dev_queue
,
398 struct Qdisc
*qdisc
);
399 void qdisc_reset(struct Qdisc
*qdisc
);
400 void qdisc_destroy(struct Qdisc
*qdisc
);
401 void qdisc_tree_reduce_backlog(struct Qdisc
*qdisc
, unsigned int n
,
403 struct Qdisc
*qdisc_alloc(struct netdev_queue
*dev_queue
,
404 const struct Qdisc_ops
*ops
);
405 struct Qdisc
*qdisc_create_dflt(struct netdev_queue
*dev_queue
,
406 const struct Qdisc_ops
*ops
, u32 parentid
);
407 void __qdisc_calculate_pkt_len(struct sk_buff
*skb
,
408 const struct qdisc_size_table
*stab
);
409 int skb_do_redirect(struct sk_buff
*);
411 static inline void skb_reset_tc(struct sk_buff
*skb
)
413 #ifdef CONFIG_NET_CLS_ACT
414 skb
->tc_redirected
= 0;
418 static inline bool skb_at_tc_ingress(const struct sk_buff
*skb
)
420 #ifdef CONFIG_NET_CLS_ACT
421 return skb
->tc_at_ingress
;
427 static inline bool skb_skip_tc_classify(struct sk_buff
*skb
)
429 #ifdef CONFIG_NET_CLS_ACT
430 if (skb
->tc_skip_classify
) {
431 skb
->tc_skip_classify
= 0;
438 /* Reset all TX qdiscs greater then index of a device. */
439 static inline void qdisc_reset_all_tx_gt(struct net_device
*dev
, unsigned int i
)
443 for (; i
< dev
->num_tx_queues
; i
++) {
444 qdisc
= rtnl_dereference(netdev_get_tx_queue(dev
, i
)->qdisc
);
446 spin_lock_bh(qdisc_lock(qdisc
));
448 spin_unlock_bh(qdisc_lock(qdisc
));
453 static inline void qdisc_reset_all_tx(struct net_device
*dev
)
455 qdisc_reset_all_tx_gt(dev
, 0);
458 /* Are all TX queues of the device empty? */
459 static inline bool qdisc_all_tx_empty(const struct net_device
*dev
)
464 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
465 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
466 const struct Qdisc
*q
= rcu_dereference(txq
->qdisc
);
477 /* Are any of the TX qdiscs changing? */
478 static inline bool qdisc_tx_changing(const struct net_device
*dev
)
482 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
483 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
484 if (rcu_access_pointer(txq
->qdisc
) != txq
->qdisc_sleeping
)
490 /* Is the device using the noop qdisc on all queues? */
491 static inline bool qdisc_tx_is_noop(const struct net_device
*dev
)
495 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
496 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
497 if (rcu_access_pointer(txq
->qdisc
) != &noop_qdisc
)
503 static inline unsigned int qdisc_pkt_len(const struct sk_buff
*skb
)
505 return qdisc_skb_cb(skb
)->pkt_len
;
508 /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
509 enum net_xmit_qdisc_t
{
510 __NET_XMIT_STOLEN
= 0x00010000,
511 __NET_XMIT_BYPASS
= 0x00020000,
514 #ifdef CONFIG_NET_CLS_ACT
515 #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
517 #define net_xmit_drop_count(e) (1)
520 static inline void qdisc_calculate_pkt_len(struct sk_buff
*skb
,
521 const struct Qdisc
*sch
)
523 #ifdef CONFIG_NET_SCHED
524 struct qdisc_size_table
*stab
= rcu_dereference_bh(sch
->stab
);
527 __qdisc_calculate_pkt_len(skb
, stab
);
531 static inline int qdisc_enqueue(struct sk_buff
*skb
, struct Qdisc
*sch
,
532 struct sk_buff
**to_free
)
534 qdisc_calculate_pkt_len(skb
, sch
);
535 return sch
->enqueue(skb
, sch
, to_free
);
538 static inline bool qdisc_is_percpu_stats(const struct Qdisc
*q
)
540 return q
->flags
& TCQ_F_CPUSTATS
;
543 static inline void _bstats_update(struct gnet_stats_basic_packed
*bstats
,
544 __u64 bytes
, __u32 packets
)
546 bstats
->bytes
+= bytes
;
547 bstats
->packets
+= packets
;
550 static inline void bstats_update(struct gnet_stats_basic_packed
*bstats
,
551 const struct sk_buff
*skb
)
553 _bstats_update(bstats
,
555 skb_is_gso(skb
) ? skb_shinfo(skb
)->gso_segs
: 1);
558 static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu
*bstats
,
559 __u64 bytes
, __u32 packets
)
561 u64_stats_update_begin(&bstats
->syncp
);
562 _bstats_update(&bstats
->bstats
, bytes
, packets
);
563 u64_stats_update_end(&bstats
->syncp
);
566 static inline void bstats_cpu_update(struct gnet_stats_basic_cpu
*bstats
,
567 const struct sk_buff
*skb
)
569 u64_stats_update_begin(&bstats
->syncp
);
570 bstats_update(&bstats
->bstats
, skb
);
571 u64_stats_update_end(&bstats
->syncp
);
574 static inline void qdisc_bstats_cpu_update(struct Qdisc
*sch
,
575 const struct sk_buff
*skb
)
577 bstats_cpu_update(this_cpu_ptr(sch
->cpu_bstats
), skb
);
580 static inline void qdisc_bstats_update(struct Qdisc
*sch
,
581 const struct sk_buff
*skb
)
583 bstats_update(&sch
->bstats
, skb
);
586 static inline void qdisc_qstats_backlog_dec(struct Qdisc
*sch
,
587 const struct sk_buff
*skb
)
589 sch
->qstats
.backlog
-= qdisc_pkt_len(skb
);
592 static inline void qdisc_qstats_backlog_inc(struct Qdisc
*sch
,
593 const struct sk_buff
*skb
)
595 sch
->qstats
.backlog
+= qdisc_pkt_len(skb
);
598 static inline void __qdisc_qstats_drop(struct Qdisc
*sch
, int count
)
600 sch
->qstats
.drops
+= count
;
603 static inline void qstats_drop_inc(struct gnet_stats_queue
*qstats
)
608 static inline void qstats_overlimit_inc(struct gnet_stats_queue
*qstats
)
610 qstats
->overlimits
++;
613 static inline void qdisc_qstats_drop(struct Qdisc
*sch
)
615 qstats_drop_inc(&sch
->qstats
);
618 static inline void qdisc_qstats_cpu_drop(struct Qdisc
*sch
)
620 this_cpu_inc(sch
->cpu_qstats
->drops
);
623 static inline void qdisc_qstats_overlimit(struct Qdisc
*sch
)
625 sch
->qstats
.overlimits
++;
628 static inline void qdisc_skb_head_init(struct qdisc_skb_head
*qh
)
635 static inline int __qdisc_enqueue_tail(struct sk_buff
*skb
, struct Qdisc
*sch
,
636 struct qdisc_skb_head
*qh
)
638 struct sk_buff
*last
= qh
->tail
;
649 qdisc_qstats_backlog_inc(sch
, skb
);
651 return NET_XMIT_SUCCESS
;
654 static inline int qdisc_enqueue_tail(struct sk_buff
*skb
, struct Qdisc
*sch
)
656 return __qdisc_enqueue_tail(skb
, sch
, &sch
->q
);
659 static inline struct sk_buff
*__qdisc_dequeue_head(struct qdisc_skb_head
*qh
)
661 struct sk_buff
*skb
= qh
->head
;
663 if (likely(skb
!= NULL
)) {
664 qh
->head
= skb
->next
;
666 if (qh
->head
== NULL
)
674 static inline struct sk_buff
*qdisc_dequeue_head(struct Qdisc
*sch
)
676 struct sk_buff
*skb
= __qdisc_dequeue_head(&sch
->q
);
678 if (likely(skb
!= NULL
)) {
679 qdisc_qstats_backlog_dec(sch
, skb
);
680 qdisc_bstats_update(sch
, skb
);
686 /* Instead of calling kfree_skb() while root qdisc lock is held,
687 * queue the skb for future freeing at end of __dev_xmit_skb()
689 static inline void __qdisc_drop(struct sk_buff
*skb
, struct sk_buff
**to_free
)
691 skb
->next
= *to_free
;
695 static inline unsigned int __qdisc_queue_drop_head(struct Qdisc
*sch
,
696 struct qdisc_skb_head
*qh
,
697 struct sk_buff
**to_free
)
699 struct sk_buff
*skb
= __qdisc_dequeue_head(qh
);
701 if (likely(skb
!= NULL
)) {
702 unsigned int len
= qdisc_pkt_len(skb
);
704 qdisc_qstats_backlog_dec(sch
, skb
);
705 __qdisc_drop(skb
, to_free
);
712 static inline unsigned int qdisc_queue_drop_head(struct Qdisc
*sch
,
713 struct sk_buff
**to_free
)
715 return __qdisc_queue_drop_head(sch
, &sch
->q
, to_free
);
718 static inline struct sk_buff
*qdisc_peek_head(struct Qdisc
*sch
)
720 const struct qdisc_skb_head
*qh
= &sch
->q
;
725 /* generic pseudo peek method for non-work-conserving qdisc */
726 static inline struct sk_buff
*qdisc_peek_dequeued(struct Qdisc
*sch
)
728 /* we can reuse ->gso_skb because peek isn't called for root qdiscs */
730 sch
->gso_skb
= sch
->dequeue(sch
);
732 /* it's still part of the queue */
733 qdisc_qstats_backlog_inc(sch
, sch
->gso_skb
);
741 /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
742 static inline struct sk_buff
*qdisc_dequeue_peeked(struct Qdisc
*sch
)
744 struct sk_buff
*skb
= sch
->gso_skb
;
748 qdisc_qstats_backlog_dec(sch
, skb
);
751 skb
= sch
->dequeue(sch
);
757 static inline void __qdisc_reset_queue(struct qdisc_skb_head
*qh
)
760 * We do not know the backlog in bytes of this list, it
761 * is up to the caller to correct it
765 rtnl_kfree_skbs(qh
->head
, qh
->tail
);
773 static inline void qdisc_reset_queue(struct Qdisc
*sch
)
775 __qdisc_reset_queue(&sch
->q
);
776 sch
->qstats
.backlog
= 0;
779 static inline struct Qdisc
*qdisc_replace(struct Qdisc
*sch
, struct Qdisc
*new,
788 qdisc_tree_reduce_backlog(old
, old
->q
.qlen
, old
->qstats
.backlog
);
791 sch_tree_unlock(sch
);
796 static inline void rtnl_qdisc_drop(struct sk_buff
*skb
, struct Qdisc
*sch
)
798 rtnl_kfree_skbs(skb
, skb
);
799 qdisc_qstats_drop(sch
);
803 static inline int qdisc_drop(struct sk_buff
*skb
, struct Qdisc
*sch
,
804 struct sk_buff
**to_free
)
806 __qdisc_drop(skb
, to_free
);
807 qdisc_qstats_drop(sch
);
809 return NET_XMIT_DROP
;
812 /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
813 long it will take to send a packet given its size.
815 static inline u32
qdisc_l2t(struct qdisc_rate_table
* rtab
, unsigned int pktlen
)
817 int slot
= pktlen
+ rtab
->rate
.cell_align
+ rtab
->rate
.overhead
;
820 slot
>>= rtab
->rate
.cell_log
;
822 return rtab
->data
[255]*(slot
>> 8) + rtab
->data
[slot
& 0xFF];
823 return rtab
->data
[slot
];
826 struct psched_ratecfg
{
827 u64 rate_bytes_ps
; /* bytes per second */
834 static inline u64
psched_l2t_ns(const struct psched_ratecfg
*r
,
839 if (unlikely(r
->linklayer
== TC_LINKLAYER_ATM
))
840 return ((u64
)(DIV_ROUND_UP(len
,48)*53) * r
->mult
) >> r
->shift
;
842 return ((u64
)len
* r
->mult
) >> r
->shift
;
845 void psched_ratecfg_precompute(struct psched_ratecfg
*r
,
846 const struct tc_ratespec
*conf
,
849 static inline void psched_ratecfg_getrate(struct tc_ratespec
*res
,
850 const struct psched_ratecfg
*r
)
852 memset(res
, 0, sizeof(*res
));
854 /* legacy struct tc_ratespec has a 32bit @rate field
855 * Qdisc using 64bit rate should add new attributes
856 * in order to maintain compatibility.
858 res
->rate
= min_t(u64
, r
->rate_bytes_ps
, ~0U);
860 res
->overhead
= r
->overhead
;
861 res
->linklayer
= (r
->linklayer
& TC_LINKLAYER_MASK
);