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; | |
45 | #define TCQ_F_BUILTIN 1 | |
46 | #define TCQ_F_THROTTLED 2 | |
47 | #define TCQ_F_INGRESS 4 | |
48 | int padded; | |
49 | struct Qdisc_ops *ops; | |
175f9c1b | 50 | struct qdisc_size_table *stab; |
1da177e4 LT |
51 | u32 handle; |
52 | u32 parent; | |
53 | atomic_t refcnt; | |
e2627c8c | 54 | unsigned long state; |
554794de | 55 | struct sk_buff *gso_skb; |
1da177e4 | 56 | struct sk_buff_head q; |
bb949fbd | 57 | struct netdev_queue *dev_queue; |
37437bb2 | 58 | struct Qdisc *next_sched; |
1da177e4 LT |
59 | struct list_head list; |
60 | ||
61 | struct gnet_stats_basic bstats; | |
62 | struct gnet_stats_queue qstats; | |
63 | struct gnet_stats_rate_est rate_est; | |
1da177e4 LT |
64 | int (*reshape_fail)(struct sk_buff *skb, |
65 | struct Qdisc *q); | |
66 | ||
72b25a91 DM |
67 | void *u32_node; |
68 | ||
1da177e4 LT |
69 | /* This field is deprecated, but it is still used by CBQ |
70 | * and it will live until better solution will be invented. | |
71 | */ | |
72 | struct Qdisc *__parent; | |
73 | }; | |
74 | ||
75 | struct Qdisc_class_ops | |
76 | { | |
77 | /* Child qdisc manipulation */ | |
78 | int (*graft)(struct Qdisc *, unsigned long cl, | |
79 | struct Qdisc *, struct Qdisc **); | |
80 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 81 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
82 | |
83 | /* Class manipulation routines */ | |
84 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
85 | void (*put)(struct Qdisc *, unsigned long); | |
86 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 87 | struct nlattr **, unsigned long *); |
1da177e4 LT |
88 | int (*delete)(struct Qdisc *, unsigned long); |
89 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
90 | ||
91 | /* Filter manipulation */ | |
92 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); | |
93 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, | |
94 | u32 classid); | |
95 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
96 | ||
97 | /* rtnetlink specific */ | |
98 | int (*dump)(struct Qdisc *, unsigned long, | |
99 | struct sk_buff *skb, struct tcmsg*); | |
100 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
101 | struct gnet_dump *); | |
102 | }; | |
103 | ||
104 | struct Qdisc_ops | |
105 | { | |
106 | struct Qdisc_ops *next; | |
20fea08b | 107 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
108 | char id[IFNAMSIZ]; |
109 | int priv_size; | |
110 | ||
111 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
112 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
90d841fd | 113 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 LT |
114 | unsigned int (*drop)(struct Qdisc *); |
115 | ||
1e90474c | 116 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
117 | void (*reset)(struct Qdisc *); |
118 | void (*destroy)(struct Qdisc *); | |
1e90474c | 119 | int (*change)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
120 | |
121 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
122 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
123 | ||
124 | struct module *owner; | |
125 | }; | |
126 | ||
127 | ||
128 | struct tcf_result | |
129 | { | |
130 | unsigned long class; | |
131 | u32 classid; | |
132 | }; | |
133 | ||
134 | struct tcf_proto_ops | |
135 | { | |
136 | struct tcf_proto_ops *next; | |
137 | char kind[IFNAMSIZ]; | |
138 | ||
139 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
140 | struct tcf_result *); | |
141 | int (*init)(struct tcf_proto*); | |
142 | void (*destroy)(struct tcf_proto*); | |
143 | ||
144 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
145 | void (*put)(struct tcf_proto*, unsigned long); | |
146 | int (*change)(struct tcf_proto*, unsigned long, | |
add93b61 | 147 | u32 handle, struct nlattr **, |
1da177e4 LT |
148 | unsigned long *); |
149 | int (*delete)(struct tcf_proto*, unsigned long); | |
150 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
151 | ||
152 | /* rtnetlink specific */ | |
153 | int (*dump)(struct tcf_proto*, unsigned long, | |
154 | struct sk_buff *skb, struct tcmsg*); | |
155 | ||
156 | struct module *owner; | |
157 | }; | |
158 | ||
159 | struct tcf_proto | |
160 | { | |
161 | /* Fast access part */ | |
162 | struct tcf_proto *next; | |
163 | void *root; | |
164 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
165 | struct tcf_result *); | |
66c6f529 | 166 | __be16 protocol; |
1da177e4 LT |
167 | |
168 | /* All the rest */ | |
169 | u32 prio; | |
170 | u32 classid; | |
171 | struct Qdisc *q; | |
172 | void *data; | |
173 | struct tcf_proto_ops *ops; | |
174 | }; | |
175 | ||
175f9c1b JK |
176 | struct qdisc_skb_cb { |
177 | unsigned int pkt_len; | |
178 | char data[]; | |
179 | }; | |
180 | ||
181 | static inline struct qdisc_skb_cb *qdisc_skb_cb(struct sk_buff *skb) | |
182 | { | |
183 | return (struct qdisc_skb_cb *)skb->cb; | |
184 | } | |
185 | ||
83874000 DM |
186 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
187 | { | |
188 | return &qdisc->q.lock; | |
189 | } | |
190 | ||
7698b4fc DM |
191 | static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc) |
192 | { | |
193 | return qdisc->dev_queue->qdisc; | |
194 | } | |
195 | ||
2540e051 JP |
196 | static inline struct Qdisc *qdisc_root_sleeping(struct Qdisc *qdisc) |
197 | { | |
198 | return qdisc->dev_queue->qdisc_sleeping; | |
199 | } | |
200 | ||
7e43f112 DM |
201 | /* The qdisc root lock is a mechanism by which to top level |
202 | * of a qdisc tree can be locked from any qdisc node in the | |
203 | * forest. This allows changing the configuration of some | |
204 | * aspect of the qdisc tree while blocking out asynchronous | |
205 | * qdisc access in the packet processing paths. | |
206 | * | |
207 | * It is only legal to do this when the root will not change | |
208 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
209 | * root. This is enforced by holding the RTNL semaphore, which | |
210 | * all users of this lock accessor must do. | |
211 | */ | |
7698b4fc DM |
212 | static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc) |
213 | { | |
214 | struct Qdisc *root = qdisc_root(qdisc); | |
215 | ||
7e43f112 | 216 | ASSERT_RTNL(); |
83874000 | 217 | return qdisc_lock(root); |
7698b4fc DM |
218 | } |
219 | ||
f6f9b93f JP |
220 | static inline spinlock_t *qdisc_root_sleeping_lock(struct Qdisc *qdisc) |
221 | { | |
222 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
223 | ||
224 | ASSERT_RTNL(); | |
225 | return qdisc_lock(root); | |
226 | } | |
227 | ||
5ce2d488 DM |
228 | static inline struct net_device *qdisc_dev(struct Qdisc *qdisc) |
229 | { | |
230 | return qdisc->dev_queue->dev; | |
231 | } | |
1da177e4 | 232 | |
78a5b30b DM |
233 | static inline void sch_tree_lock(struct Qdisc *q) |
234 | { | |
fe439dd0 | 235 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
236 | } |
237 | ||
238 | static inline void sch_tree_unlock(struct Qdisc *q) | |
239 | { | |
fe439dd0 | 240 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
241 | } |
242 | ||
243 | #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) | |
244 | #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) | |
1da177e4 | 245 | |
e41a33e6 TG |
246 | extern struct Qdisc noop_qdisc; |
247 | extern struct Qdisc_ops noop_qdisc_ops; | |
248 | ||
6fe1c7a5 PM |
249 | struct Qdisc_class_common |
250 | { | |
251 | u32 classid; | |
252 | struct hlist_node hnode; | |
253 | }; | |
254 | ||
255 | struct Qdisc_class_hash | |
256 | { | |
257 | struct hlist_head *hash; | |
258 | unsigned int hashsize; | |
259 | unsigned int hashmask; | |
260 | unsigned int hashelems; | |
261 | }; | |
262 | ||
263 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
264 | { | |
265 | id ^= id >> 8; | |
266 | id ^= id >> 4; | |
267 | return id & mask; | |
268 | } | |
269 | ||
270 | static inline struct Qdisc_class_common * | |
271 | qdisc_class_find(struct Qdisc_class_hash *hash, u32 id) | |
272 | { | |
273 | struct Qdisc_class_common *cl; | |
274 | struct hlist_node *n; | |
275 | unsigned int h; | |
276 | ||
277 | h = qdisc_class_hash(id, hash->hashmask); | |
278 | hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { | |
279 | if (cl->classid == id) | |
280 | return cl; | |
281 | } | |
282 | return NULL; | |
283 | } | |
284 | ||
285 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); | |
286 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
287 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
288 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
289 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
290 | ||
e41a33e6 TG |
291 | extern void dev_init_scheduler(struct net_device *dev); |
292 | extern void dev_shutdown(struct net_device *dev); | |
293 | extern void dev_activate(struct net_device *dev); | |
294 | extern void dev_deactivate(struct net_device *dev); | |
295 | extern void qdisc_reset(struct Qdisc *qdisc); | |
296 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
43effa1e | 297 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
5ce2d488 | 298 | extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
bb949fbd | 299 | struct Qdisc_ops *ops); |
e41a33e6 | 300 | extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, |
bb949fbd | 301 | struct netdev_queue *dev_queue, |
9f9afec4 | 302 | struct Qdisc_ops *ops, u32 parentid); |
175f9c1b JK |
303 | extern void qdisc_calculate_pkt_len(struct sk_buff *skb, |
304 | struct qdisc_size_table *stab); | |
a48b5a61 | 305 | extern void tcf_destroy(struct tcf_proto *tp); |
ff31ab56 | 306 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
1da177e4 | 307 | |
5aa70995 DM |
308 | /* Reset all TX qdiscs of a device. */ |
309 | static inline void qdisc_reset_all_tx(struct net_device *dev) | |
310 | { | |
e8a0464c DM |
311 | unsigned int i; |
312 | for (i = 0; i < dev->num_tx_queues; i++) | |
313 | qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc); | |
5aa70995 DM |
314 | } |
315 | ||
3e745dd6 DM |
316 | /* Are all TX queues of the device empty? */ |
317 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
318 | { | |
e8a0464c DM |
319 | unsigned int i; |
320 | for (i = 0; i < dev->num_tx_queues; i++) { | |
321 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
322 | const struct Qdisc *q = txq->qdisc; | |
3e745dd6 | 323 | |
e8a0464c DM |
324 | if (q->q.qlen) |
325 | return false; | |
326 | } | |
327 | return true; | |
3e745dd6 DM |
328 | } |
329 | ||
6fa9864b DM |
330 | /* Are any of the TX qdiscs changing? */ |
331 | static inline bool qdisc_tx_changing(struct net_device *dev) | |
332 | { | |
e8a0464c DM |
333 | unsigned int i; |
334 | for (i = 0; i < dev->num_tx_queues; i++) { | |
335 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
336 | if (txq->qdisc != txq->qdisc_sleeping) | |
337 | return true; | |
338 | } | |
339 | return false; | |
6fa9864b DM |
340 | } |
341 | ||
e8a0464c | 342 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
343 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
344 | { | |
e8a0464c DM |
345 | unsigned int i; |
346 | for (i = 0; i < dev->num_tx_queues; i++) { | |
347 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
348 | if (txq->qdisc != &noop_qdisc) | |
349 | return false; | |
350 | } | |
351 | return true; | |
05297949 DM |
352 | } |
353 | ||
0abf77e5 JK |
354 | static inline unsigned int qdisc_pkt_len(struct sk_buff *skb) |
355 | { | |
175f9c1b | 356 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
357 | } |
358 | ||
c27f339a | 359 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
360 | enum net_xmit_qdisc_t { |
361 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 362 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
363 | }; |
364 | ||
c27f339a | 365 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 366 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
367 | #else |
368 | #define net_xmit_drop_count(e) (1) | |
369 | #endif | |
370 | ||
5f86173b JK |
371 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
372 | { | |
3a682fbd | 373 | #ifdef CONFIG_NET_SCHED |
175f9c1b JK |
374 | if (sch->stab) |
375 | qdisc_calculate_pkt_len(skb, sch->stab); | |
3a682fbd | 376 | #endif |
5f86173b JK |
377 | return sch->enqueue(skb, sch); |
378 | } | |
379 | ||
380 | static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) | |
381 | { | |
175f9c1b | 382 | qdisc_skb_cb(skb)->pkt_len = skb->len; |
378a2f09 | 383 | return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; |
5f86173b JK |
384 | } |
385 | ||
9972b25d TG |
386 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
387 | struct sk_buff_head *list) | |
388 | { | |
389 | __skb_queue_tail(list, skb); | |
0abf77e5 JK |
390 | sch->qstats.backlog += qdisc_pkt_len(skb); |
391 | sch->bstats.bytes += qdisc_pkt_len(skb); | |
9972b25d TG |
392 | sch->bstats.packets++; |
393 | ||
394 | return NET_XMIT_SUCCESS; | |
395 | } | |
396 | ||
397 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
398 | { | |
399 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
400 | } | |
401 | ||
402 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
403 | struct sk_buff_head *list) | |
404 | { | |
405 | struct sk_buff *skb = __skb_dequeue(list); | |
406 | ||
407 | if (likely(skb != NULL)) | |
0abf77e5 | 408 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9972b25d TG |
409 | |
410 | return skb; | |
411 | } | |
412 | ||
413 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
414 | { | |
415 | return __qdisc_dequeue_head(sch, &sch->q); | |
416 | } | |
417 | ||
418 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
419 | struct sk_buff_head *list) | |
420 | { | |
421 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
422 | ||
423 | if (likely(skb != NULL)) | |
0abf77e5 | 424 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9972b25d TG |
425 | |
426 | return skb; | |
427 | } | |
428 | ||
429 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
430 | { | |
431 | return __qdisc_dequeue_tail(sch, &sch->q); | |
432 | } | |
433 | ||
48a8f519 PM |
434 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
435 | { | |
436 | return skb_peek(&sch->q); | |
437 | } | |
438 | ||
77be155c JP |
439 | /* generic pseudo peek method for non-work-conserving qdisc */ |
440 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
441 | { | |
442 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ | |
61c9eaf9 | 443 | if (!sch->gso_skb) { |
77be155c | 444 | sch->gso_skb = sch->dequeue(sch); |
61c9eaf9 JP |
445 | if (sch->gso_skb) |
446 | /* it's still part of the queue */ | |
447 | sch->q.qlen++; | |
448 | } | |
77be155c JP |
449 | |
450 | return sch->gso_skb; | |
451 | } | |
452 | ||
453 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
454 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
455 | { | |
456 | struct sk_buff *skb = sch->gso_skb; | |
457 | ||
61c9eaf9 | 458 | if (skb) { |
77be155c | 459 | sch->gso_skb = NULL; |
61c9eaf9 JP |
460 | sch->q.qlen--; |
461 | } else { | |
77be155c | 462 | skb = sch->dequeue(sch); |
61c9eaf9 | 463 | } |
77be155c JP |
464 | |
465 | return skb; | |
466 | } | |
467 | ||
9972b25d TG |
468 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
469 | struct sk_buff_head *list) | |
470 | { | |
471 | /* | |
472 | * We do not know the backlog in bytes of this list, it | |
473 | * is up to the caller to correct it | |
474 | */ | |
93245dd6 | 475 | __skb_queue_purge(list); |
9972b25d TG |
476 | } |
477 | ||
478 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
479 | { | |
480 | __qdisc_reset_queue(sch, &sch->q); | |
481 | sch->qstats.backlog = 0; | |
482 | } | |
483 | ||
484 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
485 | struct sk_buff_head *list) | |
486 | { | |
487 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
488 | ||
489 | if (likely(skb != NULL)) { | |
0abf77e5 | 490 | unsigned int len = qdisc_pkt_len(skb); |
9972b25d TG |
491 | kfree_skb(skb); |
492 | return len; | |
493 | } | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
499 | { | |
500 | return __qdisc_queue_drop(sch, &sch->q); | |
501 | } | |
502 | ||
503 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
504 | { | |
505 | kfree_skb(skb); | |
506 | sch->qstats.drops++; | |
507 | ||
508 | return NET_XMIT_DROP; | |
509 | } | |
510 | ||
511 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
512 | { | |
513 | sch->qstats.drops++; | |
514 | ||
c3bc7cff | 515 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
516 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
517 | goto drop; | |
518 | ||
519 | return NET_XMIT_SUCCESS; | |
520 | ||
521 | drop: | |
522 | #endif | |
523 | kfree_skb(skb); | |
524 | return NET_XMIT_DROP; | |
525 | } | |
526 | ||
e9bef55d JDB |
527 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
528 | long it will take to send a packet given its size. | |
529 | */ | |
530 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
531 | { | |
e08b0998 JDB |
532 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
533 | if (slot < 0) | |
534 | slot = 0; | |
e9bef55d JDB |
535 | slot >>= rtab->rate.cell_log; |
536 | if (slot > 255) | |
537 | return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]); | |
538 | return rtab->data[slot]; | |
539 | } | |
540 | ||
12da81d1 JHS |
541 | #ifdef CONFIG_NET_CLS_ACT |
542 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask) | |
543 | { | |
544 | struct sk_buff *n = skb_clone(skb, gfp_mask); | |
545 | ||
546 | if (n) { | |
547 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
548 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
549 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
550 | } |
551 | return n; | |
552 | } | |
553 | #endif | |
554 | ||
1da177e4 | 555 | #endif |