Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef __NET_SCHED_GENERIC_H |
2 | #define __NET_SCHED_GENERIC_H | |
3 | ||
1da177e4 LT |
4 | #include <linux/netdevice.h> |
5 | #include <linux/types.h> | |
6 | #include <linux/rcupdate.h> | |
7 | #include <linux/module.h> | |
1da177e4 LT |
8 | #include <linux/pkt_sched.h> |
9 | #include <linux/pkt_cls.h> | |
10 | #include <net/gen_stats.h> | |
be577ddc | 11 | #include <net/rtnetlink.h> |
1da177e4 LT |
12 | |
13 | struct Qdisc_ops; | |
14 | struct qdisc_walker; | |
15 | struct tcf_walker; | |
16 | struct module; | |
17 | ||
18 | struct qdisc_rate_table | |
19 | { | |
20 | struct tc_ratespec rate; | |
21 | u32 data[256]; | |
22 | struct qdisc_rate_table *next; | |
23 | int refcnt; | |
24 | }; | |
25 | ||
e2627c8c DM |
26 | enum qdisc_state_t |
27 | { | |
28 | __QDISC_STATE_RUNNING, | |
37437bb2 | 29 | __QDISC_STATE_SCHED, |
a9312ae8 | 30 | __QDISC_STATE_DEACTIVATED, |
e2627c8c DM |
31 | }; |
32 | ||
175f9c1b JK |
33 | struct qdisc_size_table { |
34 | struct list_head list; | |
35 | struct tc_sizespec szopts; | |
36 | int refcnt; | |
37 | u16 data[]; | |
38 | }; | |
39 | ||
1da177e4 LT |
40 | struct Qdisc |
41 | { | |
42 | int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); | |
43 | struct sk_buff * (*dequeue)(struct Qdisc *dev); | |
44 | unsigned flags; | |
b00355db JP |
45 | #define TCQ_F_BUILTIN 1 |
46 | #define TCQ_F_THROTTLED 2 | |
47 | #define TCQ_F_INGRESS 4 | |
bbd8a0d3 | 48 | #define TCQ_F_CAN_BYPASS 8 |
b00355db | 49 | #define TCQ_F_WARN_NONWC (1 << 16) |
1da177e4 LT |
50 | int padded; |
51 | struct Qdisc_ops *ops; | |
175f9c1b | 52 | struct qdisc_size_table *stab; |
5e140dfc | 53 | struct list_head list; |
1da177e4 LT |
54 | u32 handle; |
55 | u32 parent; | |
56 | atomic_t refcnt; | |
1da177e4 | 57 | struct gnet_stats_rate_est rate_est; |
1da177e4 LT |
58 | int (*reshape_fail)(struct sk_buff *skb, |
59 | struct Qdisc *q); | |
60 | ||
72b25a91 DM |
61 | void *u32_node; |
62 | ||
1da177e4 LT |
63 | /* This field is deprecated, but it is still used by CBQ |
64 | * and it will live until better solution will be invented. | |
65 | */ | |
66 | struct Qdisc *__parent; | |
5e140dfc ED |
67 | struct netdev_queue *dev_queue; |
68 | struct Qdisc *next_sched; | |
69 | ||
70 | struct sk_buff *gso_skb; | |
71 | /* | |
72 | * For performance sake on SMP, we put highly modified fields at the end | |
73 | */ | |
74 | unsigned long state; | |
75 | struct sk_buff_head q; | |
c1a8f1f1 | 76 | struct gnet_stats_basic_packed bstats; |
5e140dfc | 77 | struct gnet_stats_queue qstats; |
1da177e4 LT |
78 | }; |
79 | ||
80 | struct Qdisc_class_ops | |
81 | { | |
82 | /* Child qdisc manipulation */ | |
83 | int (*graft)(struct Qdisc *, unsigned long cl, | |
84 | struct Qdisc *, struct Qdisc **); | |
85 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 86 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
87 | |
88 | /* Class manipulation routines */ | |
89 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
90 | void (*put)(struct Qdisc *, unsigned long); | |
91 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 92 | struct nlattr **, unsigned long *); |
1da177e4 LT |
93 | int (*delete)(struct Qdisc *, unsigned long); |
94 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
95 | ||
96 | /* Filter manipulation */ | |
97 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); | |
98 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, | |
99 | u32 classid); | |
100 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
101 | ||
102 | /* rtnetlink specific */ | |
103 | int (*dump)(struct Qdisc *, unsigned long, | |
104 | struct sk_buff *skb, struct tcmsg*); | |
105 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
106 | struct gnet_dump *); | |
107 | }; | |
108 | ||
109 | struct Qdisc_ops | |
110 | { | |
111 | struct Qdisc_ops *next; | |
20fea08b | 112 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
113 | char id[IFNAMSIZ]; |
114 | int priv_size; | |
115 | ||
116 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
117 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
90d841fd | 118 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 LT |
119 | unsigned int (*drop)(struct Qdisc *); |
120 | ||
1e90474c | 121 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
122 | void (*reset)(struct Qdisc *); |
123 | void (*destroy)(struct Qdisc *); | |
1e90474c | 124 | int (*change)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
125 | |
126 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
127 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
128 | ||
129 | struct module *owner; | |
130 | }; | |
131 | ||
132 | ||
133 | struct tcf_result | |
134 | { | |
135 | unsigned long class; | |
136 | u32 classid; | |
137 | }; | |
138 | ||
139 | struct tcf_proto_ops | |
140 | { | |
141 | struct tcf_proto_ops *next; | |
142 | char kind[IFNAMSIZ]; | |
143 | ||
144 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
145 | struct tcf_result *); | |
146 | int (*init)(struct tcf_proto*); | |
147 | void (*destroy)(struct tcf_proto*); | |
148 | ||
149 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
150 | void (*put)(struct tcf_proto*, unsigned long); | |
151 | int (*change)(struct tcf_proto*, unsigned long, | |
add93b61 | 152 | u32 handle, struct nlattr **, |
1da177e4 LT |
153 | unsigned long *); |
154 | int (*delete)(struct tcf_proto*, unsigned long); | |
155 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
156 | ||
157 | /* rtnetlink specific */ | |
158 | int (*dump)(struct tcf_proto*, unsigned long, | |
159 | struct sk_buff *skb, struct tcmsg*); | |
160 | ||
161 | struct module *owner; | |
162 | }; | |
163 | ||
164 | struct tcf_proto | |
165 | { | |
166 | /* Fast access part */ | |
167 | struct tcf_proto *next; | |
168 | void *root; | |
169 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
170 | struct tcf_result *); | |
66c6f529 | 171 | __be16 protocol; |
1da177e4 LT |
172 | |
173 | /* All the rest */ | |
174 | u32 prio; | |
175 | u32 classid; | |
176 | struct Qdisc *q; | |
177 | void *data; | |
178 | struct tcf_proto_ops *ops; | |
179 | }; | |
180 | ||
175f9c1b JK |
181 | struct qdisc_skb_cb { |
182 | unsigned int pkt_len; | |
183 | char data[]; | |
184 | }; | |
185 | ||
bbd8a0d3 KK |
186 | static inline int qdisc_qlen(struct Qdisc *q) |
187 | { | |
188 | return q->q.qlen; | |
189 | } | |
190 | ||
175f9c1b JK |
191 | static inline struct qdisc_skb_cb *qdisc_skb_cb(struct sk_buff *skb) |
192 | { | |
193 | return (struct qdisc_skb_cb *)skb->cb; | |
194 | } | |
195 | ||
83874000 DM |
196 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
197 | { | |
198 | return &qdisc->q.lock; | |
199 | } | |
200 | ||
7698b4fc DM |
201 | static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc) |
202 | { | |
203 | return qdisc->dev_queue->qdisc; | |
204 | } | |
205 | ||
2540e051 JP |
206 | static inline struct Qdisc *qdisc_root_sleeping(struct Qdisc *qdisc) |
207 | { | |
208 | return qdisc->dev_queue->qdisc_sleeping; | |
209 | } | |
210 | ||
7e43f112 DM |
211 | /* The qdisc root lock is a mechanism by which to top level |
212 | * of a qdisc tree can be locked from any qdisc node in the | |
213 | * forest. This allows changing the configuration of some | |
214 | * aspect of the qdisc tree while blocking out asynchronous | |
215 | * qdisc access in the packet processing paths. | |
216 | * | |
217 | * It is only legal to do this when the root will not change | |
218 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
219 | * root. This is enforced by holding the RTNL semaphore, which | |
220 | * all users of this lock accessor must do. | |
221 | */ | |
7698b4fc DM |
222 | static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc) |
223 | { | |
224 | struct Qdisc *root = qdisc_root(qdisc); | |
225 | ||
7e43f112 | 226 | ASSERT_RTNL(); |
83874000 | 227 | return qdisc_lock(root); |
7698b4fc DM |
228 | } |
229 | ||
f6f9b93f JP |
230 | static inline spinlock_t *qdisc_root_sleeping_lock(struct Qdisc *qdisc) |
231 | { | |
232 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
233 | ||
234 | ASSERT_RTNL(); | |
235 | return qdisc_lock(root); | |
236 | } | |
237 | ||
5ce2d488 DM |
238 | static inline struct net_device *qdisc_dev(struct Qdisc *qdisc) |
239 | { | |
240 | return qdisc->dev_queue->dev; | |
241 | } | |
1da177e4 | 242 | |
78a5b30b DM |
243 | static inline void sch_tree_lock(struct Qdisc *q) |
244 | { | |
fe439dd0 | 245 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
246 | } |
247 | ||
248 | static inline void sch_tree_unlock(struct Qdisc *q) | |
249 | { | |
fe439dd0 | 250 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
251 | } |
252 | ||
253 | #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) | |
254 | #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) | |
1da177e4 | 255 | |
e41a33e6 TG |
256 | extern struct Qdisc noop_qdisc; |
257 | extern struct Qdisc_ops noop_qdisc_ops; | |
258 | ||
6fe1c7a5 PM |
259 | struct Qdisc_class_common |
260 | { | |
261 | u32 classid; | |
262 | struct hlist_node hnode; | |
263 | }; | |
264 | ||
265 | struct Qdisc_class_hash | |
266 | { | |
267 | struct hlist_head *hash; | |
268 | unsigned int hashsize; | |
269 | unsigned int hashmask; | |
270 | unsigned int hashelems; | |
271 | }; | |
272 | ||
273 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
274 | { | |
275 | id ^= id >> 8; | |
276 | id ^= id >> 4; | |
277 | return id & mask; | |
278 | } | |
279 | ||
280 | static inline struct Qdisc_class_common * | |
281 | qdisc_class_find(struct Qdisc_class_hash *hash, u32 id) | |
282 | { | |
283 | struct Qdisc_class_common *cl; | |
284 | struct hlist_node *n; | |
285 | unsigned int h; | |
286 | ||
287 | h = qdisc_class_hash(id, hash->hashmask); | |
288 | hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { | |
289 | if (cl->classid == id) | |
290 | return cl; | |
291 | } | |
292 | return NULL; | |
293 | } | |
294 | ||
295 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); | |
296 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
297 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
298 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
299 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
300 | ||
e41a33e6 TG |
301 | extern void dev_init_scheduler(struct net_device *dev); |
302 | extern void dev_shutdown(struct net_device *dev); | |
303 | extern void dev_activate(struct net_device *dev); | |
304 | extern void dev_deactivate(struct net_device *dev); | |
305 | extern void qdisc_reset(struct Qdisc *qdisc); | |
306 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
43effa1e | 307 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
5ce2d488 | 308 | extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
bb949fbd | 309 | struct Qdisc_ops *ops); |
e41a33e6 | 310 | extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, |
bb949fbd | 311 | struct netdev_queue *dev_queue, |
9f9afec4 | 312 | struct Qdisc_ops *ops, u32 parentid); |
175f9c1b JK |
313 | extern void qdisc_calculate_pkt_len(struct sk_buff *skb, |
314 | struct qdisc_size_table *stab); | |
a48b5a61 | 315 | extern void tcf_destroy(struct tcf_proto *tp); |
ff31ab56 | 316 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
1da177e4 | 317 | |
5aa70995 DM |
318 | /* Reset all TX qdiscs of a device. */ |
319 | static inline void qdisc_reset_all_tx(struct net_device *dev) | |
320 | { | |
e8a0464c DM |
321 | unsigned int i; |
322 | for (i = 0; i < dev->num_tx_queues; i++) | |
323 | qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc); | |
5aa70995 DM |
324 | } |
325 | ||
3e745dd6 DM |
326 | /* Are all TX queues of the device empty? */ |
327 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
328 | { | |
e8a0464c DM |
329 | unsigned int i; |
330 | for (i = 0; i < dev->num_tx_queues; i++) { | |
331 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
332 | const struct Qdisc *q = txq->qdisc; | |
3e745dd6 | 333 | |
e8a0464c DM |
334 | if (q->q.qlen) |
335 | return false; | |
336 | } | |
337 | return true; | |
3e745dd6 DM |
338 | } |
339 | ||
6fa9864b DM |
340 | /* Are any of the TX qdiscs changing? */ |
341 | static inline bool qdisc_tx_changing(struct net_device *dev) | |
342 | { | |
e8a0464c DM |
343 | unsigned int i; |
344 | for (i = 0; i < dev->num_tx_queues; i++) { | |
345 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
346 | if (txq->qdisc != txq->qdisc_sleeping) | |
347 | return true; | |
348 | } | |
349 | return false; | |
6fa9864b DM |
350 | } |
351 | ||
e8a0464c | 352 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
353 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
354 | { | |
e8a0464c DM |
355 | unsigned int i; |
356 | for (i = 0; i < dev->num_tx_queues; i++) { | |
357 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
358 | if (txq->qdisc != &noop_qdisc) | |
359 | return false; | |
360 | } | |
361 | return true; | |
05297949 DM |
362 | } |
363 | ||
0abf77e5 JK |
364 | static inline unsigned int qdisc_pkt_len(struct sk_buff *skb) |
365 | { | |
175f9c1b | 366 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
367 | } |
368 | ||
c27f339a | 369 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
370 | enum net_xmit_qdisc_t { |
371 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 372 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
373 | }; |
374 | ||
c27f339a | 375 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 376 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
377 | #else |
378 | #define net_xmit_drop_count(e) (1) | |
379 | #endif | |
380 | ||
5f86173b JK |
381 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
382 | { | |
3a682fbd | 383 | #ifdef CONFIG_NET_SCHED |
175f9c1b JK |
384 | if (sch->stab) |
385 | qdisc_calculate_pkt_len(skb, sch->stab); | |
3a682fbd | 386 | #endif |
5f86173b JK |
387 | return sch->enqueue(skb, sch); |
388 | } | |
389 | ||
390 | static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) | |
391 | { | |
175f9c1b | 392 | qdisc_skb_cb(skb)->pkt_len = skb->len; |
378a2f09 | 393 | return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; |
5f86173b JK |
394 | } |
395 | ||
bbd8a0d3 KK |
396 | static inline void __qdisc_update_bstats(struct Qdisc *sch, unsigned int len) |
397 | { | |
398 | sch->bstats.bytes += len; | |
399 | sch->bstats.packets++; | |
400 | } | |
401 | ||
9972b25d TG |
402 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
403 | struct sk_buff_head *list) | |
404 | { | |
405 | __skb_queue_tail(list, skb); | |
0abf77e5 | 406 | sch->qstats.backlog += qdisc_pkt_len(skb); |
bbd8a0d3 | 407 | __qdisc_update_bstats(sch, qdisc_pkt_len(skb)); |
9972b25d TG |
408 | |
409 | return NET_XMIT_SUCCESS; | |
410 | } | |
411 | ||
412 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
413 | { | |
414 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
415 | } | |
416 | ||
417 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
418 | struct sk_buff_head *list) | |
419 | { | |
420 | struct sk_buff *skb = __skb_dequeue(list); | |
421 | ||
422 | if (likely(skb != NULL)) | |
0abf77e5 | 423 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9972b25d TG |
424 | |
425 | return skb; | |
426 | } | |
427 | ||
428 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
429 | { | |
430 | return __qdisc_dequeue_head(sch, &sch->q); | |
431 | } | |
432 | ||
433 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
434 | struct sk_buff_head *list) | |
435 | { | |
436 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
437 | ||
438 | if (likely(skb != NULL)) | |
0abf77e5 | 439 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9972b25d TG |
440 | |
441 | return skb; | |
442 | } | |
443 | ||
444 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
445 | { | |
446 | return __qdisc_dequeue_tail(sch, &sch->q); | |
447 | } | |
448 | ||
48a8f519 PM |
449 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
450 | { | |
451 | return skb_peek(&sch->q); | |
452 | } | |
453 | ||
77be155c JP |
454 | /* generic pseudo peek method for non-work-conserving qdisc */ |
455 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
456 | { | |
457 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ | |
61c9eaf9 | 458 | if (!sch->gso_skb) { |
77be155c | 459 | sch->gso_skb = sch->dequeue(sch); |
61c9eaf9 JP |
460 | if (sch->gso_skb) |
461 | /* it's still part of the queue */ | |
462 | sch->q.qlen++; | |
463 | } | |
77be155c JP |
464 | |
465 | return sch->gso_skb; | |
466 | } | |
467 | ||
468 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
469 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
470 | { | |
471 | struct sk_buff *skb = sch->gso_skb; | |
472 | ||
61c9eaf9 | 473 | if (skb) { |
77be155c | 474 | sch->gso_skb = NULL; |
61c9eaf9 JP |
475 | sch->q.qlen--; |
476 | } else { | |
77be155c | 477 | skb = sch->dequeue(sch); |
61c9eaf9 | 478 | } |
77be155c JP |
479 | |
480 | return skb; | |
481 | } | |
482 | ||
9972b25d TG |
483 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
484 | struct sk_buff_head *list) | |
485 | { | |
486 | /* | |
487 | * We do not know the backlog in bytes of this list, it | |
488 | * is up to the caller to correct it | |
489 | */ | |
93245dd6 | 490 | __skb_queue_purge(list); |
9972b25d TG |
491 | } |
492 | ||
493 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
494 | { | |
495 | __qdisc_reset_queue(sch, &sch->q); | |
496 | sch->qstats.backlog = 0; | |
497 | } | |
498 | ||
499 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
500 | struct sk_buff_head *list) | |
501 | { | |
502 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
503 | ||
504 | if (likely(skb != NULL)) { | |
0abf77e5 | 505 | unsigned int len = qdisc_pkt_len(skb); |
9972b25d TG |
506 | kfree_skb(skb); |
507 | return len; | |
508 | } | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
514 | { | |
515 | return __qdisc_queue_drop(sch, &sch->q); | |
516 | } | |
517 | ||
518 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
519 | { | |
520 | kfree_skb(skb); | |
521 | sch->qstats.drops++; | |
522 | ||
523 | return NET_XMIT_DROP; | |
524 | } | |
525 | ||
526 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
527 | { | |
528 | sch->qstats.drops++; | |
529 | ||
c3bc7cff | 530 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
531 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
532 | goto drop; | |
533 | ||
534 | return NET_XMIT_SUCCESS; | |
535 | ||
536 | drop: | |
537 | #endif | |
538 | kfree_skb(skb); | |
539 | return NET_XMIT_DROP; | |
540 | } | |
541 | ||
e9bef55d JDB |
542 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
543 | long it will take to send a packet given its size. | |
544 | */ | |
545 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
546 | { | |
e08b0998 JDB |
547 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
548 | if (slot < 0) | |
549 | slot = 0; | |
e9bef55d JDB |
550 | slot >>= rtab->rate.cell_log; |
551 | if (slot > 255) | |
552 | return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]); | |
553 | return rtab->data[slot]; | |
554 | } | |
555 | ||
12da81d1 JHS |
556 | #ifdef CONFIG_NET_CLS_ACT |
557 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask) | |
558 | { | |
559 | struct sk_buff *n = skb_clone(skb, gfp_mask); | |
560 | ||
561 | if (n) { | |
562 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
563 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
564 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
565 | } |
566 | return n; | |
567 | } | |
568 | #endif | |
569 | ||
1da177e4 | 570 | #endif |