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, | |
29 | }; | |
30 | ||
1da177e4 LT |
31 | struct Qdisc |
32 | { | |
33 | int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); | |
34 | struct sk_buff * (*dequeue)(struct Qdisc *dev); | |
35 | unsigned flags; | |
36 | #define TCQ_F_BUILTIN 1 | |
37 | #define TCQ_F_THROTTLED 2 | |
38 | #define TCQ_F_INGRESS 4 | |
39 | int padded; | |
40 | struct Qdisc_ops *ops; | |
41 | u32 handle; | |
42 | u32 parent; | |
43 | atomic_t refcnt; | |
e2627c8c | 44 | unsigned long state; |
d3b753db | 45 | struct sk_buff *gso_skb; |
1da177e4 | 46 | struct sk_buff_head q; |
bb949fbd | 47 | struct netdev_queue *dev_queue; |
1da177e4 LT |
48 | struct list_head list; |
49 | ||
50 | struct gnet_stats_basic bstats; | |
51 | struct gnet_stats_queue qstats; | |
52 | struct gnet_stats_rate_est rate_est; | |
1da177e4 LT |
53 | struct rcu_head q_rcu; |
54 | int (*reshape_fail)(struct sk_buff *skb, | |
55 | struct Qdisc *q); | |
56 | ||
57 | /* This field is deprecated, but it is still used by CBQ | |
58 | * and it will live until better solution will be invented. | |
59 | */ | |
60 | struct Qdisc *__parent; | |
61 | }; | |
62 | ||
63 | struct Qdisc_class_ops | |
64 | { | |
65 | /* Child qdisc manipulation */ | |
66 | int (*graft)(struct Qdisc *, unsigned long cl, | |
67 | struct Qdisc *, struct Qdisc **); | |
68 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 69 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
70 | |
71 | /* Class manipulation routines */ | |
72 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
73 | void (*put)(struct Qdisc *, unsigned long); | |
74 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 75 | struct nlattr **, unsigned long *); |
1da177e4 LT |
76 | int (*delete)(struct Qdisc *, unsigned long); |
77 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
78 | ||
79 | /* Filter manipulation */ | |
80 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); | |
81 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, | |
82 | u32 classid); | |
83 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
84 | ||
85 | /* rtnetlink specific */ | |
86 | int (*dump)(struct Qdisc *, unsigned long, | |
87 | struct sk_buff *skb, struct tcmsg*); | |
88 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
89 | struct gnet_dump *); | |
90 | }; | |
91 | ||
92 | struct Qdisc_ops | |
93 | { | |
94 | struct Qdisc_ops *next; | |
20fea08b | 95 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
96 | char id[IFNAMSIZ]; |
97 | int priv_size; | |
98 | ||
99 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
100 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
101 | int (*requeue)(struct sk_buff *, struct Qdisc *); | |
102 | unsigned int (*drop)(struct Qdisc *); | |
103 | ||
1e90474c | 104 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
105 | void (*reset)(struct Qdisc *); |
106 | void (*destroy)(struct Qdisc *); | |
1e90474c | 107 | int (*change)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
108 | |
109 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
110 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
111 | ||
112 | struct module *owner; | |
113 | }; | |
114 | ||
115 | ||
116 | struct tcf_result | |
117 | { | |
118 | unsigned long class; | |
119 | u32 classid; | |
120 | }; | |
121 | ||
122 | struct tcf_proto_ops | |
123 | { | |
124 | struct tcf_proto_ops *next; | |
125 | char kind[IFNAMSIZ]; | |
126 | ||
127 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
128 | struct tcf_result *); | |
129 | int (*init)(struct tcf_proto*); | |
130 | void (*destroy)(struct tcf_proto*); | |
131 | ||
132 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
133 | void (*put)(struct tcf_proto*, unsigned long); | |
134 | int (*change)(struct tcf_proto*, unsigned long, | |
add93b61 | 135 | u32 handle, struct nlattr **, |
1da177e4 LT |
136 | unsigned long *); |
137 | int (*delete)(struct tcf_proto*, unsigned long); | |
138 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
139 | ||
140 | /* rtnetlink specific */ | |
141 | int (*dump)(struct tcf_proto*, unsigned long, | |
142 | struct sk_buff *skb, struct tcmsg*); | |
143 | ||
144 | struct module *owner; | |
145 | }; | |
146 | ||
147 | struct tcf_proto | |
148 | { | |
149 | /* Fast access part */ | |
150 | struct tcf_proto *next; | |
151 | void *root; | |
152 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
153 | struct tcf_result *); | |
66c6f529 | 154 | __be16 protocol; |
1da177e4 LT |
155 | |
156 | /* All the rest */ | |
157 | u32 prio; | |
158 | u32 classid; | |
159 | struct Qdisc *q; | |
160 | void *data; | |
161 | struct tcf_proto_ops *ops; | |
162 | }; | |
163 | ||
5ce2d488 DM |
164 | static inline struct net_device *qdisc_dev(struct Qdisc *qdisc) |
165 | { | |
166 | return qdisc->dev_queue->dev; | |
167 | } | |
1da177e4 LT |
168 | |
169 | extern void qdisc_lock_tree(struct net_device *dev); | |
170 | extern void qdisc_unlock_tree(struct net_device *dev); | |
171 | ||
5ce2d488 DM |
172 | #define sch_tree_lock(q) qdisc_lock_tree(qdisc_dev(q)) |
173 | #define sch_tree_unlock(q) qdisc_unlock_tree(qdisc_dev(q)) | |
174 | #define tcf_tree_lock(tp) qdisc_lock_tree(qdisc_dev((tp)->q)) | |
175 | #define tcf_tree_unlock(tp) qdisc_unlock_tree(qdisc_dev((tp)->q)) | |
1da177e4 | 176 | |
e41a33e6 TG |
177 | extern struct Qdisc noop_qdisc; |
178 | extern struct Qdisc_ops noop_qdisc_ops; | |
179 | ||
6fe1c7a5 PM |
180 | struct Qdisc_class_common |
181 | { | |
182 | u32 classid; | |
183 | struct hlist_node hnode; | |
184 | }; | |
185 | ||
186 | struct Qdisc_class_hash | |
187 | { | |
188 | struct hlist_head *hash; | |
189 | unsigned int hashsize; | |
190 | unsigned int hashmask; | |
191 | unsigned int hashelems; | |
192 | }; | |
193 | ||
194 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
195 | { | |
196 | id ^= id >> 8; | |
197 | id ^= id >> 4; | |
198 | return id & mask; | |
199 | } | |
200 | ||
201 | static inline struct Qdisc_class_common * | |
202 | qdisc_class_find(struct Qdisc_class_hash *hash, u32 id) | |
203 | { | |
204 | struct Qdisc_class_common *cl; | |
205 | struct hlist_node *n; | |
206 | unsigned int h; | |
207 | ||
208 | h = qdisc_class_hash(id, hash->hashmask); | |
209 | hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { | |
210 | if (cl->classid == id) | |
211 | return cl; | |
212 | } | |
213 | return NULL; | |
214 | } | |
215 | ||
216 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); | |
217 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
218 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
219 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
220 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
221 | ||
e41a33e6 TG |
222 | extern void dev_init_scheduler(struct net_device *dev); |
223 | extern void dev_shutdown(struct net_device *dev); | |
224 | extern void dev_activate(struct net_device *dev); | |
225 | extern void dev_deactivate(struct net_device *dev); | |
226 | extern void qdisc_reset(struct Qdisc *qdisc); | |
227 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
43effa1e | 228 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
5ce2d488 | 229 | extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
bb949fbd | 230 | struct Qdisc_ops *ops); |
e41a33e6 | 231 | extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, |
bb949fbd | 232 | struct netdev_queue *dev_queue, |
9f9afec4 | 233 | struct Qdisc_ops *ops, u32 parentid); |
a48b5a61 | 234 | extern void tcf_destroy(struct tcf_proto *tp); |
ff31ab56 | 235 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
1da177e4 | 236 | |
5aa70995 DM |
237 | /* Reset all TX qdiscs of a device. */ |
238 | static inline void qdisc_reset_all_tx(struct net_device *dev) | |
239 | { | |
e8a0464c DM |
240 | unsigned int i; |
241 | for (i = 0; i < dev->num_tx_queues; i++) | |
242 | qdisc_reset(netdev_get_tx_queue(dev, i)->qdisc); | |
5aa70995 DM |
243 | } |
244 | ||
3e745dd6 DM |
245 | /* Are all TX queues of the device empty? */ |
246 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
247 | { | |
e8a0464c DM |
248 | unsigned int i; |
249 | for (i = 0; i < dev->num_tx_queues; i++) { | |
250 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
251 | const struct Qdisc *q = txq->qdisc; | |
3e745dd6 | 252 | |
e8a0464c DM |
253 | if (q->q.qlen) |
254 | return false; | |
255 | } | |
256 | return true; | |
3e745dd6 DM |
257 | } |
258 | ||
6fa9864b DM |
259 | /* Are any of the TX qdiscs changing? */ |
260 | static inline bool qdisc_tx_changing(struct net_device *dev) | |
261 | { | |
e8a0464c DM |
262 | unsigned int i; |
263 | for (i = 0; i < dev->num_tx_queues; i++) { | |
264 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
265 | if (txq->qdisc != txq->qdisc_sleeping) | |
266 | return true; | |
267 | } | |
268 | return false; | |
6fa9864b DM |
269 | } |
270 | ||
e8a0464c | 271 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
272 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
273 | { | |
e8a0464c DM |
274 | unsigned int i; |
275 | for (i = 0; i < dev->num_tx_queues; i++) { | |
276 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
277 | if (txq->qdisc != &noop_qdisc) | |
278 | return false; | |
279 | } | |
280 | return true; | |
05297949 DM |
281 | } |
282 | ||
9972b25d TG |
283 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
284 | struct sk_buff_head *list) | |
285 | { | |
286 | __skb_queue_tail(list, skb); | |
287 | sch->qstats.backlog += skb->len; | |
288 | sch->bstats.bytes += skb->len; | |
289 | sch->bstats.packets++; | |
290 | ||
291 | return NET_XMIT_SUCCESS; | |
292 | } | |
293 | ||
294 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
295 | { | |
296 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
297 | } | |
298 | ||
299 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
300 | struct sk_buff_head *list) | |
301 | { | |
302 | struct sk_buff *skb = __skb_dequeue(list); | |
303 | ||
304 | if (likely(skb != NULL)) | |
305 | sch->qstats.backlog -= skb->len; | |
306 | ||
307 | return skb; | |
308 | } | |
309 | ||
310 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
311 | { | |
312 | return __qdisc_dequeue_head(sch, &sch->q); | |
313 | } | |
314 | ||
315 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
316 | struct sk_buff_head *list) | |
317 | { | |
318 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
319 | ||
320 | if (likely(skb != NULL)) | |
321 | sch->qstats.backlog -= skb->len; | |
322 | ||
323 | return skb; | |
324 | } | |
325 | ||
326 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
327 | { | |
328 | return __qdisc_dequeue_tail(sch, &sch->q); | |
329 | } | |
330 | ||
331 | static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch, | |
332 | struct sk_buff_head *list) | |
333 | { | |
334 | __skb_queue_head(list, skb); | |
335 | sch->qstats.backlog += skb->len; | |
336 | sch->qstats.requeues++; | |
337 | ||
338 | return NET_XMIT_SUCCESS; | |
339 | } | |
340 | ||
341 | static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch) | |
342 | { | |
343 | return __qdisc_requeue(skb, sch, &sch->q); | |
344 | } | |
345 | ||
346 | static inline void __qdisc_reset_queue(struct Qdisc *sch, | |
347 | struct sk_buff_head *list) | |
348 | { | |
349 | /* | |
350 | * We do not know the backlog in bytes of this list, it | |
351 | * is up to the caller to correct it | |
352 | */ | |
353 | skb_queue_purge(list); | |
354 | } | |
355 | ||
356 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
357 | { | |
358 | __qdisc_reset_queue(sch, &sch->q); | |
359 | sch->qstats.backlog = 0; | |
360 | } | |
361 | ||
362 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
363 | struct sk_buff_head *list) | |
364 | { | |
365 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
366 | ||
367 | if (likely(skb != NULL)) { | |
368 | unsigned int len = skb->len; | |
369 | kfree_skb(skb); | |
370 | return len; | |
371 | } | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
376 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
377 | { | |
378 | return __qdisc_queue_drop(sch, &sch->q); | |
379 | } | |
380 | ||
381 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
382 | { | |
383 | kfree_skb(skb); | |
384 | sch->qstats.drops++; | |
385 | ||
386 | return NET_XMIT_DROP; | |
387 | } | |
388 | ||
389 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
390 | { | |
391 | sch->qstats.drops++; | |
392 | ||
c3bc7cff | 393 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
394 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
395 | goto drop; | |
396 | ||
397 | return NET_XMIT_SUCCESS; | |
398 | ||
399 | drop: | |
400 | #endif | |
401 | kfree_skb(skb); | |
402 | return NET_XMIT_DROP; | |
403 | } | |
404 | ||
e9bef55d JDB |
405 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
406 | long it will take to send a packet given its size. | |
407 | */ | |
408 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
409 | { | |
e08b0998 JDB |
410 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
411 | if (slot < 0) | |
412 | slot = 0; | |
e9bef55d JDB |
413 | slot >>= rtab->rate.cell_log; |
414 | if (slot > 255) | |
415 | return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]); | |
416 | return rtab->data[slot]; | |
417 | } | |
418 | ||
12da81d1 JHS |
419 | #ifdef CONFIG_NET_CLS_ACT |
420 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask) | |
421 | { | |
422 | struct sk_buff *n = skb_clone(skb, gfp_mask); | |
423 | ||
424 | if (n) { | |
425 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
426 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
427 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
428 | } |
429 | return n; | |
430 | } | |
431 | #endif | |
432 | ||
1da177e4 | 433 | #endif |