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
;
79 struct netdev_queue
*dev_queue
;
81 struct net_rate_estimator __rcu
*rate_est
;
82 struct gnet_stats_basic_cpu __percpu
*cpu_bstats
;
83 struct gnet_stats_queue __percpu
*cpu_qstats
;
86 * For performance sake on SMP, we put highly modified fields at the end
88 struct sk_buff
*gso_skb ____cacheline_aligned_in_smp
;
89 struct qdisc_skb_head q
;
90 struct gnet_stats_basic_packed bstats
;
92 struct gnet_stats_queue qstats
;
94 struct Qdisc
*next_sched
;
95 struct sk_buff
*skb_bad_txq
;
96 struct rcu_head rcu_head
;
100 spinlock_t busylock ____cacheline_aligned_in_smp
;
103 static inline void qdisc_refcount_inc(struct Qdisc
*qdisc
)
105 if (qdisc
->flags
& TCQ_F_BUILTIN
)
107 refcount_inc(&qdisc
->refcnt
);
110 static inline bool qdisc_is_running(const struct Qdisc
*qdisc
)
112 return (raw_read_seqcount(&qdisc
->running
) & 1) ? true : false;
115 static inline bool qdisc_run_begin(struct Qdisc
*qdisc
)
117 if (qdisc_is_running(qdisc
))
119 /* Variant of write_seqcount_begin() telling lockdep a trylock
122 raw_write_seqcount_begin(&qdisc
->running
);
123 seqcount_acquire(&qdisc
->running
.dep_map
, 0, 1, _RET_IP_
);
127 static inline void qdisc_run_end(struct Qdisc
*qdisc
)
129 write_seqcount_end(&qdisc
->running
);
132 static inline bool qdisc_may_bulk(const struct Qdisc
*qdisc
)
134 return qdisc
->flags
& TCQ_F_ONETXQUEUE
;
137 static inline int qdisc_avail_bulklimit(const struct netdev_queue
*txq
)
140 /* Non-BQL migrated drivers will return 0, too. */
141 return dql_avail(&txq
->dql
);
147 struct Qdisc_class_ops
{
148 /* Child qdisc manipulation */
149 struct netdev_queue
* (*select_queue
)(struct Qdisc
*, struct tcmsg
*);
150 int (*graft
)(struct Qdisc
*, unsigned long cl
,
151 struct Qdisc
*, struct Qdisc
**);
152 struct Qdisc
* (*leaf
)(struct Qdisc
*, unsigned long cl
);
153 void (*qlen_notify
)(struct Qdisc
*, unsigned long);
155 /* Class manipulation routines */
156 unsigned long (*find
)(struct Qdisc
*, u32 classid
);
157 int (*change
)(struct Qdisc
*, u32
, u32
,
158 struct nlattr
**, unsigned long *);
159 int (*delete)(struct Qdisc
*, unsigned long);
160 void (*walk
)(struct Qdisc
*, struct qdisc_walker
* arg
);
162 /* Filter manipulation */
163 struct tcf_block
* (*tcf_block
)(struct Qdisc
*, unsigned long);
164 unsigned long (*bind_tcf
)(struct Qdisc
*, unsigned long,
166 void (*unbind_tcf
)(struct Qdisc
*, unsigned long);
168 /* rtnetlink specific */
169 int (*dump
)(struct Qdisc
*, unsigned long,
170 struct sk_buff
*skb
, struct tcmsg
*);
171 int (*dump_stats
)(struct Qdisc
*, unsigned long,
176 struct Qdisc_ops
*next
;
177 const struct Qdisc_class_ops
*cl_ops
;
181 int (*enqueue
)(struct sk_buff
*skb
,
183 struct sk_buff
**to_free
);
184 struct sk_buff
* (*dequeue
)(struct Qdisc
*);
185 struct sk_buff
* (*peek
)(struct Qdisc
*);
187 int (*init
)(struct Qdisc
*, struct nlattr
*arg
);
188 void (*reset
)(struct Qdisc
*);
189 void (*destroy
)(struct Qdisc
*);
190 int (*change
)(struct Qdisc
*, struct nlattr
*arg
);
191 void (*attach
)(struct Qdisc
*);
193 int (*dump
)(struct Qdisc
*, struct sk_buff
*);
194 int (*dump_stats
)(struct Qdisc
*, struct gnet_dump
*);
196 struct module
*owner
;
206 const struct tcf_proto
*goto_tp
;
210 struct tcf_proto_ops
{
211 struct list_head head
;
214 int (*classify
)(struct sk_buff
*,
215 const struct tcf_proto
*,
216 struct tcf_result
*);
217 int (*init
)(struct tcf_proto
*);
218 void (*destroy
)(struct tcf_proto
*);
220 void* (*get
)(struct tcf_proto
*, u32 handle
);
221 int (*change
)(struct net
*net
, struct sk_buff
*,
222 struct tcf_proto
*, unsigned long,
223 u32 handle
, struct nlattr
**,
225 int (*delete)(struct tcf_proto
*, void *, bool*);
226 void (*walk
)(struct tcf_proto
*, struct tcf_walker
*arg
);
227 void (*bind_class
)(void *, u32
, unsigned long);
229 /* rtnetlink specific */
230 int (*dump
)(struct net
*, struct tcf_proto
*, void *,
231 struct sk_buff
*skb
, struct tcmsg
*);
233 struct module
*owner
;
237 /* Fast access part */
238 struct tcf_proto __rcu
*next
;
240 int (*classify
)(struct sk_buff
*,
241 const struct tcf_proto
*,
242 struct tcf_result
*);
250 const struct tcf_proto_ops
*ops
;
251 struct tcf_chain
*chain
;
255 struct qdisc_skb_cb
{
256 unsigned int pkt_len
;
257 u16 slave_dev_queue_mapping
;
259 #define QDISC_CB_PRIV_LEN 20
260 unsigned char data
[QDISC_CB_PRIV_LEN
];
264 struct tcf_proto __rcu
*filter_chain
;
265 struct tcf_proto __rcu
**p_filter_chain
;
266 struct list_head list
;
267 struct tcf_block
*block
;
268 u32 index
; /* chain index */
273 struct list_head chain_list
;
276 static inline void qdisc_cb_private_validate(const struct sk_buff
*skb
, int sz
)
278 struct qdisc_skb_cb
*qcb
;
280 BUILD_BUG_ON(sizeof(skb
->cb
) < offsetof(struct qdisc_skb_cb
, data
) + sz
);
281 BUILD_BUG_ON(sizeof(qcb
->data
) < sz
);
284 static inline int qdisc_qlen(const struct Qdisc
*q
)
289 static inline struct qdisc_skb_cb
*qdisc_skb_cb(const struct sk_buff
*skb
)
291 return (struct qdisc_skb_cb
*)skb
->cb
;
294 static inline spinlock_t
*qdisc_lock(struct Qdisc
*qdisc
)
296 return &qdisc
->q
.lock
;
299 static inline struct Qdisc
*qdisc_root(const struct Qdisc
*qdisc
)
301 struct Qdisc
*q
= rcu_dereference_rtnl(qdisc
->dev_queue
->qdisc
);
306 static inline struct Qdisc
*qdisc_root_sleeping(const struct Qdisc
*qdisc
)
308 return qdisc
->dev_queue
->qdisc_sleeping
;
311 /* The qdisc root lock is a mechanism by which to top level
312 * of a qdisc tree can be locked from any qdisc node in the
313 * forest. This allows changing the configuration of some
314 * aspect of the qdisc tree while blocking out asynchronous
315 * qdisc access in the packet processing paths.
317 * It is only legal to do this when the root will not change
318 * on us. Otherwise we'll potentially lock the wrong qdisc
319 * root. This is enforced by holding the RTNL semaphore, which
320 * all users of this lock accessor must do.
322 static inline spinlock_t
*qdisc_root_lock(const struct Qdisc
*qdisc
)
324 struct Qdisc
*root
= qdisc_root(qdisc
);
327 return qdisc_lock(root
);
330 static inline spinlock_t
*qdisc_root_sleeping_lock(const struct Qdisc
*qdisc
)
332 struct Qdisc
*root
= qdisc_root_sleeping(qdisc
);
335 return qdisc_lock(root
);
338 static inline seqcount_t
*qdisc_root_sleeping_running(const struct Qdisc
*qdisc
)
340 struct Qdisc
*root
= qdisc_root_sleeping(qdisc
);
343 return &root
->running
;
346 static inline struct net_device
*qdisc_dev(const struct Qdisc
*qdisc
)
348 return qdisc
->dev_queue
->dev
;
351 static inline void sch_tree_lock(const struct Qdisc
*q
)
353 spin_lock_bh(qdisc_root_sleeping_lock(q
));
356 static inline void sch_tree_unlock(const struct Qdisc
*q
)
358 spin_unlock_bh(qdisc_root_sleeping_lock(q
));
361 #define tcf_tree_lock(tp) sch_tree_lock((tp)->q)
362 #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q)
364 extern struct Qdisc noop_qdisc
;
365 extern struct Qdisc_ops noop_qdisc_ops
;
366 extern struct Qdisc_ops pfifo_fast_ops
;
367 extern struct Qdisc_ops mq_qdisc_ops
;
368 extern struct Qdisc_ops noqueue_qdisc_ops
;
369 extern const struct Qdisc_ops
*default_qdisc_ops
;
370 static inline const struct Qdisc_ops
*
371 get_default_qdisc_ops(const struct net_device
*dev
, int ntx
)
373 return ntx
< dev
->real_num_tx_queues
?
374 default_qdisc_ops
: &pfifo_fast_ops
;
377 struct Qdisc_class_common
{
379 struct hlist_node hnode
;
382 struct Qdisc_class_hash
{
383 struct hlist_head
*hash
;
384 unsigned int hashsize
;
385 unsigned int hashmask
;
386 unsigned int hashelems
;
389 static inline unsigned int qdisc_class_hash(u32 id
, u32 mask
)
396 static inline struct Qdisc_class_common
*
397 qdisc_class_find(const struct Qdisc_class_hash
*hash
, u32 id
)
399 struct Qdisc_class_common
*cl
;
405 h
= qdisc_class_hash(id
, hash
->hashmask
);
406 hlist_for_each_entry(cl
, &hash
->hash
[h
], hnode
) {
407 if (cl
->classid
== id
)
413 int qdisc_class_hash_init(struct Qdisc_class_hash
*);
414 void qdisc_class_hash_insert(struct Qdisc_class_hash
*,
415 struct Qdisc_class_common
*);
416 void qdisc_class_hash_remove(struct Qdisc_class_hash
*,
417 struct Qdisc_class_common
*);
418 void qdisc_class_hash_grow(struct Qdisc
*, struct Qdisc_class_hash
*);
419 void qdisc_class_hash_destroy(struct Qdisc_class_hash
*);
421 void dev_init_scheduler(struct net_device
*dev
);
422 void dev_shutdown(struct net_device
*dev
);
423 void dev_activate(struct net_device
*dev
);
424 void dev_deactivate(struct net_device
*dev
);
425 void dev_deactivate_many(struct list_head
*head
);
426 struct Qdisc
*dev_graft_qdisc(struct netdev_queue
*dev_queue
,
427 struct Qdisc
*qdisc
);
428 void qdisc_reset(struct Qdisc
*qdisc
);
429 void qdisc_destroy(struct Qdisc
*qdisc
);
430 void qdisc_tree_reduce_backlog(struct Qdisc
*qdisc
, unsigned int n
,
432 struct Qdisc
*qdisc_alloc(struct netdev_queue
*dev_queue
,
433 const struct Qdisc_ops
*ops
);
434 struct Qdisc
*qdisc_create_dflt(struct netdev_queue
*dev_queue
,
435 const struct Qdisc_ops
*ops
, u32 parentid
);
436 void __qdisc_calculate_pkt_len(struct sk_buff
*skb
,
437 const struct qdisc_size_table
*stab
);
438 int skb_do_redirect(struct sk_buff
*);
440 static inline void skb_reset_tc(struct sk_buff
*skb
)
442 #ifdef CONFIG_NET_CLS_ACT
443 skb
->tc_redirected
= 0;
447 static inline bool skb_at_tc_ingress(const struct sk_buff
*skb
)
449 #ifdef CONFIG_NET_CLS_ACT
450 return skb
->tc_at_ingress
;
456 static inline bool skb_skip_tc_classify(struct sk_buff
*skb
)
458 #ifdef CONFIG_NET_CLS_ACT
459 if (skb
->tc_skip_classify
) {
460 skb
->tc_skip_classify
= 0;
467 /* Reset all TX qdiscs greater then index of a device. */
468 static inline void qdisc_reset_all_tx_gt(struct net_device
*dev
, unsigned int i
)
472 for (; i
< dev
->num_tx_queues
; i
++) {
473 qdisc
= rtnl_dereference(netdev_get_tx_queue(dev
, i
)->qdisc
);
475 spin_lock_bh(qdisc_lock(qdisc
));
477 spin_unlock_bh(qdisc_lock(qdisc
));
482 static inline void qdisc_reset_all_tx(struct net_device
*dev
)
484 qdisc_reset_all_tx_gt(dev
, 0);
487 /* Are all TX queues of the device empty? */
488 static inline bool qdisc_all_tx_empty(const struct net_device
*dev
)
493 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
494 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
495 const struct Qdisc
*q
= rcu_dereference(txq
->qdisc
);
506 /* Are any of the TX qdiscs changing? */
507 static inline bool qdisc_tx_changing(const struct net_device
*dev
)
511 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
512 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
513 if (rcu_access_pointer(txq
->qdisc
) != txq
->qdisc_sleeping
)
519 /* Is the device using the noop qdisc on all queues? */
520 static inline bool qdisc_tx_is_noop(const struct net_device
*dev
)
524 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
525 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
526 if (rcu_access_pointer(txq
->qdisc
) != &noop_qdisc
)
532 static inline unsigned int qdisc_pkt_len(const struct sk_buff
*skb
)
534 return qdisc_skb_cb(skb
)->pkt_len
;
537 /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
538 enum net_xmit_qdisc_t
{
539 __NET_XMIT_STOLEN
= 0x00010000,
540 __NET_XMIT_BYPASS
= 0x00020000,
543 #ifdef CONFIG_NET_CLS_ACT
544 #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
546 #define net_xmit_drop_count(e) (1)
549 static inline void qdisc_calculate_pkt_len(struct sk_buff
*skb
,
550 const struct Qdisc
*sch
)
552 #ifdef CONFIG_NET_SCHED
553 struct qdisc_size_table
*stab
= rcu_dereference_bh(sch
->stab
);
556 __qdisc_calculate_pkt_len(skb
, stab
);
560 static inline int qdisc_enqueue(struct sk_buff
*skb
, struct Qdisc
*sch
,
561 struct sk_buff
**to_free
)
563 qdisc_calculate_pkt_len(skb
, sch
);
564 return sch
->enqueue(skb
, sch
, to_free
);
567 static inline bool qdisc_is_percpu_stats(const struct Qdisc
*q
)
569 return q
->flags
& TCQ_F_CPUSTATS
;
572 static inline void _bstats_update(struct gnet_stats_basic_packed
*bstats
,
573 __u64 bytes
, __u32 packets
)
575 bstats
->bytes
+= bytes
;
576 bstats
->packets
+= packets
;
579 static inline void bstats_update(struct gnet_stats_basic_packed
*bstats
,
580 const struct sk_buff
*skb
)
582 _bstats_update(bstats
,
584 skb_is_gso(skb
) ? skb_shinfo(skb
)->gso_segs
: 1);
587 static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu
*bstats
,
588 __u64 bytes
, __u32 packets
)
590 u64_stats_update_begin(&bstats
->syncp
);
591 _bstats_update(&bstats
->bstats
, bytes
, packets
);
592 u64_stats_update_end(&bstats
->syncp
);
595 static inline void bstats_cpu_update(struct gnet_stats_basic_cpu
*bstats
,
596 const struct sk_buff
*skb
)
598 u64_stats_update_begin(&bstats
->syncp
);
599 bstats_update(&bstats
->bstats
, skb
);
600 u64_stats_update_end(&bstats
->syncp
);
603 static inline void qdisc_bstats_cpu_update(struct Qdisc
*sch
,
604 const struct sk_buff
*skb
)
606 bstats_cpu_update(this_cpu_ptr(sch
->cpu_bstats
), skb
);
609 static inline void qdisc_bstats_update(struct Qdisc
*sch
,
610 const struct sk_buff
*skb
)
612 bstats_update(&sch
->bstats
, skb
);
615 static inline void qdisc_qstats_backlog_dec(struct Qdisc
*sch
,
616 const struct sk_buff
*skb
)
618 sch
->qstats
.backlog
-= qdisc_pkt_len(skb
);
621 static inline void qdisc_qstats_backlog_inc(struct Qdisc
*sch
,
622 const struct sk_buff
*skb
)
624 sch
->qstats
.backlog
+= qdisc_pkt_len(skb
);
627 static inline void __qdisc_qstats_drop(struct Qdisc
*sch
, int count
)
629 sch
->qstats
.drops
+= count
;
632 static inline void qstats_drop_inc(struct gnet_stats_queue
*qstats
)
637 static inline void qstats_overlimit_inc(struct gnet_stats_queue
*qstats
)
639 qstats
->overlimits
++;
642 static inline void qdisc_qstats_drop(struct Qdisc
*sch
)
644 qstats_drop_inc(&sch
->qstats
);
647 static inline void qdisc_qstats_cpu_drop(struct Qdisc
*sch
)
649 this_cpu_inc(sch
->cpu_qstats
->drops
);
652 static inline void qdisc_qstats_overlimit(struct Qdisc
*sch
)
654 sch
->qstats
.overlimits
++;
657 static inline void qdisc_skb_head_init(struct qdisc_skb_head
*qh
)
664 static inline int __qdisc_enqueue_tail(struct sk_buff
*skb
, struct Qdisc
*sch
,
665 struct qdisc_skb_head
*qh
)
667 struct sk_buff
*last
= qh
->tail
;
678 qdisc_qstats_backlog_inc(sch
, skb
);
680 return NET_XMIT_SUCCESS
;
683 static inline int qdisc_enqueue_tail(struct sk_buff
*skb
, struct Qdisc
*sch
)
685 return __qdisc_enqueue_tail(skb
, sch
, &sch
->q
);
688 static inline struct sk_buff
*__qdisc_dequeue_head(struct qdisc_skb_head
*qh
)
690 struct sk_buff
*skb
= qh
->head
;
692 if (likely(skb
!= NULL
)) {
693 qh
->head
= skb
->next
;
695 if (qh
->head
== NULL
)
703 static inline struct sk_buff
*qdisc_dequeue_head(struct Qdisc
*sch
)
705 struct sk_buff
*skb
= __qdisc_dequeue_head(&sch
->q
);
707 if (likely(skb
!= NULL
)) {
708 qdisc_qstats_backlog_dec(sch
, skb
);
709 qdisc_bstats_update(sch
, skb
);
715 /* Instead of calling kfree_skb() while root qdisc lock is held,
716 * queue the skb for future freeing at end of __dev_xmit_skb()
718 static inline void __qdisc_drop(struct sk_buff
*skb
, struct sk_buff
**to_free
)
720 skb
->next
= *to_free
;
724 static inline unsigned int __qdisc_queue_drop_head(struct Qdisc
*sch
,
725 struct qdisc_skb_head
*qh
,
726 struct sk_buff
**to_free
)
728 struct sk_buff
*skb
= __qdisc_dequeue_head(qh
);
730 if (likely(skb
!= NULL
)) {
731 unsigned int len
= qdisc_pkt_len(skb
);
733 qdisc_qstats_backlog_dec(sch
, skb
);
734 __qdisc_drop(skb
, to_free
);
741 static inline unsigned int qdisc_queue_drop_head(struct Qdisc
*sch
,
742 struct sk_buff
**to_free
)
744 return __qdisc_queue_drop_head(sch
, &sch
->q
, to_free
);
747 static inline struct sk_buff
*qdisc_peek_head(struct Qdisc
*sch
)
749 const struct qdisc_skb_head
*qh
= &sch
->q
;
754 /* generic pseudo peek method for non-work-conserving qdisc */
755 static inline struct sk_buff
*qdisc_peek_dequeued(struct Qdisc
*sch
)
757 /* we can reuse ->gso_skb because peek isn't called for root qdiscs */
759 sch
->gso_skb
= sch
->dequeue(sch
);
761 /* it's still part of the queue */
762 qdisc_qstats_backlog_inc(sch
, sch
->gso_skb
);
770 /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */
771 static inline struct sk_buff
*qdisc_dequeue_peeked(struct Qdisc
*sch
)
773 struct sk_buff
*skb
= sch
->gso_skb
;
777 qdisc_qstats_backlog_dec(sch
, skb
);
780 skb
= sch
->dequeue(sch
);
786 static inline void __qdisc_reset_queue(struct qdisc_skb_head
*qh
)
789 * We do not know the backlog in bytes of this list, it
790 * is up to the caller to correct it
794 rtnl_kfree_skbs(qh
->head
, qh
->tail
);
802 static inline void qdisc_reset_queue(struct Qdisc
*sch
)
804 __qdisc_reset_queue(&sch
->q
);
805 sch
->qstats
.backlog
= 0;
808 static inline struct Qdisc
*qdisc_replace(struct Qdisc
*sch
, struct Qdisc
*new,
817 unsigned int qlen
= old
->q
.qlen
;
818 unsigned int backlog
= old
->qstats
.backlog
;
821 qdisc_tree_reduce_backlog(old
, qlen
, backlog
);
823 sch_tree_unlock(sch
);
828 static inline void rtnl_qdisc_drop(struct sk_buff
*skb
, struct Qdisc
*sch
)
830 rtnl_kfree_skbs(skb
, skb
);
831 qdisc_qstats_drop(sch
);
835 static inline int qdisc_drop(struct sk_buff
*skb
, struct Qdisc
*sch
,
836 struct sk_buff
**to_free
)
838 __qdisc_drop(skb
, to_free
);
839 qdisc_qstats_drop(sch
);
841 return NET_XMIT_DROP
;
844 /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how
845 long it will take to send a packet given its size.
847 static inline u32
qdisc_l2t(struct qdisc_rate_table
* rtab
, unsigned int pktlen
)
849 int slot
= pktlen
+ rtab
->rate
.cell_align
+ rtab
->rate
.overhead
;
852 slot
>>= rtab
->rate
.cell_log
;
854 return rtab
->data
[255]*(slot
>> 8) + rtab
->data
[slot
& 0xFF];
855 return rtab
->data
[slot
];
858 struct psched_ratecfg
{
859 u64 rate_bytes_ps
; /* bytes per second */
866 static inline u64
psched_l2t_ns(const struct psched_ratecfg
*r
,
871 if (unlikely(r
->linklayer
== TC_LINKLAYER_ATM
))
872 return ((u64
)(DIV_ROUND_UP(len
,48)*53) * r
->mult
) >> r
->shift
;
874 return ((u64
)len
* r
->mult
) >> r
->shift
;
877 void psched_ratecfg_precompute(struct psched_ratecfg
*r
,
878 const struct tc_ratespec
*conf
,
881 static inline void psched_ratecfg_getrate(struct tc_ratespec
*res
,
882 const struct psched_ratecfg
*r
)
884 memset(res
, 0, sizeof(*res
));
886 /* legacy struct tc_ratespec has a 32bit @rate field
887 * Qdisc using 64bit rate should add new attributes
888 * in order to maintain compatibility.
890 res
->rate
= min_t(u64
, r
->rate_bytes_ps
, ~0U);
892 res
->overhead
= r
->overhead
;
893 res
->linklayer
= (r
->linklayer
& TC_LINKLAYER_MASK
);