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 <linux/list.h>
12 #include <linux/refcount.h>
13 #include <net/gen_stats.h>
14 #include <net/rtnetlink.h>
21 struct qdisc_rate_table
{
22 struct tc_ratespec rate
;
24 struct qdisc_rate_table
*next
;
30 __QDISC_STATE_DEACTIVATED
,
33 struct qdisc_size_table
{
35 struct list_head list
;
36 struct tc_sizespec szopts
;
41 /* similar to sk_buff_head, but skb->prev pointer is undefined. */
42 struct qdisc_skb_head
{
50 int (*enqueue
)(struct sk_buff
*skb
,
52 struct sk_buff
**to_free
);
53 struct sk_buff
* (*dequeue
)(struct Qdisc
*sch
);
55 #define TCQ_F_BUILTIN 1
56 #define TCQ_F_INGRESS 2
57 #define TCQ_F_CAN_BYPASS 4
58 #define TCQ_F_MQROOT 8
59 #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for
60 * q->dev_queue : It can test
61 * netif_xmit_frozen_or_stopped() before
62 * dequeueing next packet.
63 * Its true for MQ/MQPRIO slaves, or non
66 #define TCQ_F_WARN_NONWC (1 << 16)
67 #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */
68 #define TCQ_F_NOPARENT 0x40 /* root of its hierarchy :
69 * qdisc_tree_decrease_qlen() should stop.
71 #define TCQ_F_INVISIBLE 0x80 /* invisible by default in dump */
73 const struct Qdisc_ops
*ops
;
74 struct qdisc_size_table __rcu
*stab
;
75 struct hlist_node hash
;
80 struct netdev_queue
*dev_queue
;
82 struct net_rate_estimator __rcu
*rate_est
;
83 struct gnet_stats_basic_cpu __percpu
*cpu_bstats
;
84 struct gnet_stats_queue __percpu
*cpu_qstats
;
87 * For performance sake on SMP, we put highly modified fields at the end
89 struct sk_buff
*gso_skb ____cacheline_aligned_in_smp
;
90 struct qdisc_skb_head q
;
91 struct gnet_stats_basic_packed bstats
;
93 struct gnet_stats_queue qstats
;
95 struct Qdisc
*next_sched
;
96 struct sk_buff
*skb_bad_txq
;
97 struct rcu_head rcu_head
;
101 spinlock_t busylock ____cacheline_aligned_in_smp
;
104 static inline bool qdisc_is_running(const struct Qdisc
*qdisc
)
106 return (raw_read_seqcount(&qdisc
->running
) & 1) ? true : false;
109 static inline bool qdisc_run_begin(struct Qdisc
*qdisc
)
111 if (qdisc_is_running(qdisc
))
113 /* Variant of write_seqcount_begin() telling lockdep a trylock
116 raw_write_seqcount_begin(&qdisc
->running
);
117 seqcount_acquire(&qdisc
->running
.dep_map
, 0, 1, _RET_IP_
);
121 static inline void qdisc_run_end(struct Qdisc
*qdisc
)
123 write_seqcount_end(&qdisc
->running
);
126 static inline bool qdisc_may_bulk(const struct Qdisc
*qdisc
)
128 return qdisc
->flags
& TCQ_F_ONETXQUEUE
;
131 static inline int qdisc_avail_bulklimit(const struct netdev_queue
*txq
)
134 /* Non-BQL migrated drivers will return 0, too. */
135 return dql_avail(&txq
->dql
);
141 struct Qdisc_class_ops
{
142 /* Child qdisc manipulation */
143 struct netdev_queue
* (*select_queue
)(struct Qdisc
*, struct tcmsg
*);
144 int (*graft
)(struct Qdisc
*, unsigned long cl
,
145 struct Qdisc
*, struct Qdisc
**);
146 struct Qdisc
* (*leaf
)(struct Qdisc
*, unsigned long cl
);
147 void (*qlen_notify
)(struct Qdisc
*, unsigned long);
149 /* Class manipulation routines */
150 unsigned long (*get
)(struct Qdisc
*, u32 classid
);
151 void (*put
)(struct Qdisc
*, unsigned long);
152 int (*change
)(struct Qdisc
*, u32
, u32
,
153 struct nlattr
**, unsigned long *);
154 int (*delete)(struct Qdisc
*, unsigned long);
155 void (*walk
)(struct Qdisc
*, struct qdisc_walker
* arg
);
157 /* Filter manipulation */
158 struct tcf_block
* (*tcf_block
)(struct Qdisc
*, unsigned long);
159 bool (*tcf_cl_offload
)(u32 classid
);
160 unsigned long (*bind_tcf
)(struct Qdisc
*, unsigned long,
162 void (*unbind_tcf
)(struct Qdisc
*, unsigned long);
164 /* rtnetlink specific */
165 int (*dump
)(struct Qdisc
*, unsigned long,
166 struct sk_buff
*skb
, struct tcmsg
*);
167 int (*dump_stats
)(struct Qdisc
*, unsigned long,
172 struct Qdisc_ops
*next
;
173 const struct Qdisc_class_ops
*cl_ops
;
177 int (*enqueue
)(struct sk_buff
*skb
,
179 struct sk_buff
**to_free
);
180 struct sk_buff
* (*dequeue
)(struct Qdisc
*);
181 struct sk_buff
* (*peek
)(struct Qdisc
*);
183 int (*init
)(struct Qdisc
*, struct nlattr
*arg
);
184 void (*reset
)(struct Qdisc
*);
185 void (*destroy
)(struct Qdisc
*);
186 int (*change
)(struct Qdisc
*, struct nlattr
*arg
);
187 void (*attach
)(struct Qdisc
*);
189 int (*dump
)(struct Qdisc
*, struct sk_buff
*);
190 int (*dump_stats
)(struct Qdisc
*, struct gnet_dump
*);
192 struct module
*owner
;
202 const struct tcf_proto
*goto_tp
;
206 struct tcf_proto_ops
{
207 struct list_head head
;
210 int (*classify
)(struct sk_buff
*,
211 const struct tcf_proto
*,
212 struct tcf_result
*);
213 int (*init
)(struct tcf_proto
*);
214 void (*destroy
)(struct tcf_proto
*);
216 unsigned long (*get
)(struct tcf_proto
*, u32 handle
);
217 int (*change
)(struct net
*net
, struct sk_buff
*,
218 struct tcf_proto
*, unsigned long,
219 u32 handle
, struct nlattr
**,
220 unsigned long *, bool);
221 int (*delete)(struct tcf_proto
*, unsigned long, bool*);
222 void (*walk
)(struct tcf_proto
*, struct tcf_walker
*arg
);
224 /* rtnetlink specific */
225 int (*dump
)(struct net
*, struct tcf_proto
*, unsigned long,
226 struct sk_buff
*skb
, struct tcmsg
*);
228 struct module
*owner
;
232 /* Fast access part */
233 struct tcf_proto __rcu
*next
;
235 int (*classify
)(struct sk_buff
*,
236 const struct tcf_proto
*,
237 struct tcf_result
*);
245 const struct tcf_proto_ops
*ops
;
246 struct tcf_chain
*chain
;
250 struct qdisc_skb_cb
{
251 unsigned int pkt_len
;
252 u16 slave_dev_queue_mapping
;
254 #define QDISC_CB_PRIV_LEN 20
255 unsigned char data
[QDISC_CB_PRIV_LEN
];
259 struct tcf_proto __rcu
*filter_chain
;
260 struct tcf_proto __rcu
**p_filter_chain
;
261 struct list_head list
;
262 struct tcf_block
*block
;
263 u32 index
; /* chain index */
268 struct list_head chain_list
;
271 static inline void qdisc_cb_private_validate(const struct sk_buff
*skb
, int sz
)
273 struct qdisc_skb_cb
*qcb
;
275 BUILD_BUG_ON(sizeof(skb
->cb
) < offsetof(struct qdisc_skb_cb
, data
) + sz
);
276 BUILD_BUG_ON(sizeof(qcb
->data
) < sz
);
279 static inline int qdisc_qlen(const struct Qdisc
*q
)
284 static inline struct qdisc_skb_cb
*qdisc_skb_cb(const struct sk_buff
*skb
)
286 return (struct qdisc_skb_cb
*)skb
->cb
;
289 static inline spinlock_t
*qdisc_lock(struct Qdisc
*qdisc
)
291 return &qdisc
->q
.lock
;
294 static inline struct Qdisc
*qdisc_root(const struct Qdisc
*qdisc
)
296 struct Qdisc
*q
= rcu_dereference_rtnl(qdisc
->dev_queue
->qdisc
);
301 static inline struct Qdisc
*qdisc_root_sleeping(const struct Qdisc
*qdisc
)
303 return qdisc
->dev_queue
->qdisc_sleeping
;
306 /* The qdisc root lock is a mechanism by which to top level
307 * of a qdisc tree can be locked from any qdisc node in the
308 * forest. This allows changing the configuration of some
309 * aspect of the qdisc tree while blocking out asynchronous
310 * qdisc access in the packet processing paths.
312 * It is only legal to do this when the root will not change
313 * on us. Otherwise we'll potentially lock the wrong qdisc
314 * root. This is enforced by holding the RTNL semaphore, which
315 * all users of this lock accessor must do.
317 static inline spinlock_t
*qdisc_root_lock(const struct Qdisc
*qdisc
)
319 struct Qdisc
*root
= qdisc_root(qdisc
);
322 return qdisc_lock(root
);
325 static inline spinlock_t
*qdisc_root_sleeping_lock(const struct Qdisc
*qdisc
)
327 struct Qdisc
*root
= qdisc_root_sleeping(qdisc
);
330 return qdisc_lock(root
);
333 static inline seqcount_t
*qdisc_root_sleeping_running(const struct Qdisc
*qdisc
)
335 struct Qdisc
*root
= qdisc_root_sleeping(qdisc
);
338 return &root
->running
;
341 static inline struct net_device
*qdisc_dev(const struct Qdisc
*qdisc
)
343 return qdisc
->dev_queue
->dev
;
346 static inline void sch_tree_lock(const struct Qdisc
*q
)
348 spin_lock_bh(qdisc_root_sleeping_lock(q
));
351 static inline void sch_tree_unlock(const struct Qdisc
*q
)
353 spin_unlock_bh(qdisc_root_sleeping_lock(q
));
356 #define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
357 #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
359 extern struct Qdisc noop_qdisc
;
360 extern struct Qdisc_ops noop_qdisc_ops
;
361 extern struct Qdisc_ops pfifo_fast_ops
;
362 extern struct Qdisc_ops mq_qdisc_ops
;
363 extern struct Qdisc_ops noqueue_qdisc_ops
;
364 extern const struct Qdisc_ops
*default_qdisc_ops
;
365 static inline const struct Qdisc_ops
*
366 get_default_qdisc_ops(const struct net_device
*dev
, int ntx
)
368 return ntx
< dev
->real_num_tx_queues
?
369 default_qdisc_ops
: &pfifo_fast_ops
;
372 struct Qdisc_class_common
{
374 struct hlist_node hnode
;
377 struct Qdisc_class_hash
{
378 struct hlist_head
*hash
;
379 unsigned int hashsize
;
380 unsigned int hashmask
;
381 unsigned int hashelems
;
384 static inline unsigned int qdisc_class_hash(u32 id
, u32 mask
)
391 static inline struct Qdisc_class_common
*
392 qdisc_class_find(const struct Qdisc_class_hash
*hash
, u32 id
)
394 struct Qdisc_class_common
*cl
;
397 h
= qdisc_class_hash(id
, hash
->hashmask
);
398 hlist_for_each_entry(cl
, &hash
->hash
[h
], hnode
) {
399 if (cl
->classid
== id
)
405 int qdisc_class_hash_init(struct Qdisc_class_hash
*);
406 void qdisc_class_hash_insert(struct Qdisc_class_hash
*,
407 struct Qdisc_class_common
*);
408 void qdisc_class_hash_remove(struct Qdisc_class_hash
*,
409 struct Qdisc_class_common
*);
410 void qdisc_class_hash_grow(struct Qdisc
*, struct Qdisc_class_hash
*);
411 void qdisc_class_hash_destroy(struct Qdisc_class_hash
*);
413 void dev_init_scheduler(struct net_device
*dev
);
414 void dev_shutdown(struct net_device
*dev
);
415 void dev_activate(struct net_device
*dev
);
416 void dev_deactivate(struct net_device
*dev
);
417 void dev_deactivate_many(struct list_head
*head
);
418 struct Qdisc
*dev_graft_qdisc(struct netdev_queue
*dev_queue
,
419 struct Qdisc
*qdisc
);
420 void qdisc_reset(struct Qdisc
*qdisc
);
421 void qdisc_destroy(struct Qdisc
*qdisc
);
422 void qdisc_tree_reduce_backlog(struct Qdisc
*qdisc
, unsigned int n
,
424 struct Qdisc
*qdisc_alloc(struct netdev_queue
*dev_queue
,
425 const struct Qdisc_ops
*ops
);
426 struct Qdisc
*qdisc_create_dflt(struct netdev_queue
*dev_queue
,
427 const struct Qdisc_ops
*ops
, u32 parentid
);
428 void __qdisc_calculate_pkt_len(struct sk_buff
*skb
,
429 const struct qdisc_size_table
*stab
);
430 int skb_do_redirect(struct sk_buff
*);
432 static inline void skb_reset_tc(struct sk_buff
*skb
)
434 #ifdef CONFIG_NET_CLS_ACT
435 skb
->tc_redirected
= 0;
439 static inline bool skb_at_tc_ingress(const struct sk_buff
*skb
)
441 #ifdef CONFIG_NET_CLS_ACT
442 return skb
->tc_at_ingress
;
448 static inline bool skb_skip_tc_classify(struct sk_buff
*skb
)
450 #ifdef CONFIG_NET_CLS_ACT
451 if (skb
->tc_skip_classify
) {
452 skb
->tc_skip_classify
= 0;
459 /* Reset all TX qdiscs greater then index of a device. */
460 static inline void qdisc_reset_all_tx_gt(struct net_device
*dev
, unsigned int i
)
464 for (; i
< dev
->num_tx_queues
; i
++) {
465 qdisc
= rtnl_dereference(netdev_get_tx_queue(dev
, i
)->qdisc
);
467 spin_lock_bh(qdisc_lock(qdisc
));
469 spin_unlock_bh(qdisc_lock(qdisc
));
474 static inline void qdisc_reset_all_tx(struct net_device
*dev
)
476 qdisc_reset_all_tx_gt(dev
, 0);
479 /* Are all TX queues of the device empty? */
480 static inline bool qdisc_all_tx_empty(const struct net_device
*dev
)
485 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
486 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
487 const struct Qdisc
*q
= rcu_dereference(txq
->qdisc
);
498 /* Are any of the TX qdiscs changing? */
499 static inline bool qdisc_tx_changing(const struct net_device
*dev
)
503 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
504 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
505 if (rcu_access_pointer(txq
->qdisc
) != txq
->qdisc_sleeping
)
511 /* Is the device using the noop qdisc on all queues? */
512 static inline bool qdisc_tx_is_noop(const struct net_device
*dev
)
516 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
517 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
518 if (rcu_access_pointer(txq
->qdisc
) != &noop_qdisc
)
524 static inline unsigned int qdisc_pkt_len(const struct sk_buff
*skb
)
526 return qdisc_skb_cb(skb
)->pkt_len
;
529 /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
530 enum net_xmit_qdisc_t
{
531 __NET_XMIT_STOLEN
= 0x00010000,
532 __NET_XMIT_BYPASS
= 0x00020000,
535 #ifdef CONFIG_NET_CLS_ACT
536 #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
538 #define net_xmit_drop_count(e) (1)
541 static inline void qdisc_calculate_pkt_len(struct sk_buff
*skb
,
542 const struct Qdisc
*sch
)
544 #ifdef CONFIG_NET_SCHED
545 struct qdisc_size_table
*stab
= rcu_dereference_bh(sch
->stab
);
548 __qdisc_calculate_pkt_len(skb
, stab
);
552 static inline int qdisc_enqueue(struct sk_buff
*skb
, struct Qdisc
*sch
,
553 struct sk_buff
**to_free
)
555 qdisc_calculate_pkt_len(skb
, sch
);
556 return sch
->enqueue(skb
, sch
, to_free
);
559 static inline bool qdisc_is_percpu_stats(const struct Qdisc
*q
)
561 return q
->flags
& TCQ_F_CPUSTATS
;
564 static inline void _bstats_update(struct gnet_stats_basic_packed
*bstats
,
565 __u64 bytes
, __u32 packets
)
567 bstats
->bytes
+= bytes
;
568 bstats
->packets
+= packets
;
571 static inline void bstats_update(struct gnet_stats_basic_packed
*bstats
,
572 const struct sk_buff
*skb
)
574 _bstats_update(bstats
,
576 skb_is_gso(skb
) ? skb_shinfo(skb
)->gso_segs
: 1);
579 static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu
*bstats
,
580 __u64 bytes
, __u32 packets
)
582 u64_stats_update_begin(&bstats
->syncp
);
583 _bstats_update(&bstats
->bstats
, bytes
, packets
);
584 u64_stats_update_end(&bstats
->syncp
);
587 static inline void bstats_cpu_update(struct gnet_stats_basic_cpu
*bstats
,
588 const struct sk_buff
*skb
)
590 u64_stats_update_begin(&bstats
->syncp
);
591 bstats_update(&bstats
->bstats
, skb
);
592 u64_stats_update_end(&bstats
->syncp
);
595 static inline void qdisc_bstats_cpu_update(struct Qdisc
*sch
,
596 const struct sk_buff
*skb
)
598 bstats_cpu_update(this_cpu_ptr(sch
->cpu_bstats
), skb
);
601 static inline void qdisc_bstats_update(struct Qdisc
*sch
,
602 const struct sk_buff
*skb
)
604 bstats_update(&sch
->bstats
, skb
);
607 static inline void qdisc_qstats_backlog_dec(struct Qdisc
*sch
,
608 const struct sk_buff
*skb
)
610 sch
->qstats
.backlog
-= qdisc_pkt_len(skb
);
613 static inline void qdisc_qstats_backlog_inc(struct Qdisc
*sch
,
614 const struct sk_buff
*skb
)
616 sch
->qstats
.backlog
+= qdisc_pkt_len(skb
);
619 static inline void __qdisc_qstats_drop(struct Qdisc
*sch
, int count
)
621 sch
->qstats
.drops
+= count
;
624 static inline void qstats_drop_inc(struct gnet_stats_queue
*qstats
)
629 static inline void qstats_overlimit_inc(struct gnet_stats_queue
*qstats
)
631 qstats
->overlimits
++;
634 static inline void qdisc_qstats_drop(struct Qdisc
*sch
)
636 qstats_drop_inc(&sch
->qstats
);
639 static inline void qdisc_qstats_cpu_drop(struct Qdisc
*sch
)
641 this_cpu_inc(sch
->cpu_qstats
->drops
);
644 static inline void qdisc_qstats_overlimit(struct Qdisc
*sch
)
646 sch
->qstats
.overlimits
++;
649 static inline void qdisc_skb_head_init(struct qdisc_skb_head
*qh
)
656 static inline int __qdisc_enqueue_tail(struct sk_buff
*skb
, struct Qdisc
*sch
,
657 struct qdisc_skb_head
*qh
)
659 struct sk_buff
*last
= qh
->tail
;
670 qdisc_qstats_backlog_inc(sch
, skb
);
672 return NET_XMIT_SUCCESS
;
675 static inline int qdisc_enqueue_tail(struct sk_buff
*skb
, struct Qdisc
*sch
)
677 return __qdisc_enqueue_tail(skb
, sch
, &sch
->q
);
680 static inline struct sk_buff
*__qdisc_dequeue_head(struct qdisc_skb_head
*qh
)
682 struct sk_buff
*skb
= qh
->head
;
684 if (likely(skb
!= NULL
)) {
685 qh
->head
= skb
->next
;
687 if (qh
->head
== NULL
)
695 static inline struct sk_buff
*qdisc_dequeue_head(struct Qdisc
*sch
)
697 struct sk_buff
*skb
= __qdisc_dequeue_head(&sch
->q
);
699 if (likely(skb
!= NULL
)) {
700 qdisc_qstats_backlog_dec(sch
, skb
);
701 qdisc_bstats_update(sch
, skb
);
707 /* Instead of calling kfree_skb() while root qdisc lock is held,
708 * queue the skb for future freeing at end of __dev_xmit_skb()
710 static inline void __qdisc_drop(struct sk_buff
*skb
, struct sk_buff
**to_free
)
712 skb
->next
= *to_free
;
716 static inline unsigned int __qdisc_queue_drop_head(struct Qdisc
*sch
,
717 struct qdisc_skb_head
*qh
,
718 struct sk_buff
**to_free
)
720 struct sk_buff
*skb
= __qdisc_dequeue_head(qh
);
722 if (likely(skb
!= NULL
)) {
723 unsigned int len
= qdisc_pkt_len(skb
);
725 qdisc_qstats_backlog_dec(sch
, skb
);
726 __qdisc_drop(skb
, to_free
);
733 static inline unsigned int qdisc_queue_drop_head(struct Qdisc
*sch
,
734 struct sk_buff
**to_free
)
736 return __qdisc_queue_drop_head(sch
, &sch
->q
, to_free
);
739 static inline struct sk_buff
*qdisc_peek_head(struct Qdisc
*sch
)
741 const struct qdisc_skb_head
*qh
= &sch
->q
;
746 /* generic pseudo peek method for non-work-conserving qdisc */
747 static inline struct sk_buff
*qdisc_peek_dequeued(struct Qdisc
*sch
)
749 /* we can reuse ->gso_skb because peek isn't called for root qdiscs */
751 sch
->gso_skb
= sch
->dequeue(sch
);
753 /* it's still part of the queue */
754 qdisc_qstats_backlog_inc(sch
, sch
->gso_skb
);
762 /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
763 static inline struct sk_buff
*qdisc_dequeue_peeked(struct Qdisc
*sch
)
765 struct sk_buff
*skb
= sch
->gso_skb
;
769 qdisc_qstats_backlog_dec(sch
, skb
);
772 skb
= sch
->dequeue(sch
);
778 static inline void __qdisc_reset_queue(struct qdisc_skb_head
*qh
)
781 * We do not know the backlog in bytes of this list, it
782 * is up to the caller to correct it
786 rtnl_kfree_skbs(qh
->head
, qh
->tail
);
794 static inline void qdisc_reset_queue(struct Qdisc
*sch
)
796 __qdisc_reset_queue(&sch
->q
);
797 sch
->qstats
.backlog
= 0;
800 static inline struct Qdisc
*qdisc_replace(struct Qdisc
*sch
, struct Qdisc
*new,
809 qdisc_tree_reduce_backlog(old
, old
->q
.qlen
, old
->qstats
.backlog
);
812 sch_tree_unlock(sch
);
817 static inline void rtnl_qdisc_drop(struct sk_buff
*skb
, struct Qdisc
*sch
)
819 rtnl_kfree_skbs(skb
, skb
);
820 qdisc_qstats_drop(sch
);
824 static inline int qdisc_drop(struct sk_buff
*skb
, struct Qdisc
*sch
,
825 struct sk_buff
**to_free
)
827 __qdisc_drop(skb
, to_free
);
828 qdisc_qstats_drop(sch
);
830 return NET_XMIT_DROP
;
833 /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
834 long it will take to send a packet given its size.
836 static inline u32
qdisc_l2t(struct qdisc_rate_table
* rtab
, unsigned int pktlen
)
838 int slot
= pktlen
+ rtab
->rate
.cell_align
+ rtab
->rate
.overhead
;
841 slot
>>= rtab
->rate
.cell_log
;
843 return rtab
->data
[255]*(slot
>> 8) + rtab
->data
[slot
& 0xFF];
844 return rtab
->data
[slot
];
847 struct psched_ratecfg
{
848 u64 rate_bytes_ps
; /* bytes per second */
855 static inline u64
psched_l2t_ns(const struct psched_ratecfg
*r
,
860 if (unlikely(r
->linklayer
== TC_LINKLAYER_ATM
))
861 return ((u64
)(DIV_ROUND_UP(len
,48)*53) * r
->mult
) >> r
->shift
;
863 return ((u64
)len
* r
->mult
) >> r
->shift
;
866 void psched_ratecfg_precompute(struct psched_ratecfg
*r
,
867 const struct tc_ratespec
*conf
,
870 static inline void psched_ratecfg_getrate(struct tc_ratespec
*res
,
871 const struct psched_ratecfg
*r
)
873 memset(res
, 0, sizeof(*res
));
875 /* legacy struct tc_ratespec has a 32bit @rate field
876 * Qdisc using 64bit rate should add new attributes
877 * in order to maintain compatibility.
879 res
->rate
= min_t(u64
, r
->rate_bytes_ps
, ~0U);
881 res
->overhead
= r
->overhead
;
882 res
->linklayer
= (r
->linklayer
& TC_LINKLAYER_MASK
);