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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 | ||
26 | struct Qdisc | |
27 | { | |
28 | int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); | |
29 | struct sk_buff * (*dequeue)(struct Qdisc *dev); | |
30 | unsigned flags; | |
31 | #define TCQ_F_BUILTIN 1 | |
32 | #define TCQ_F_THROTTLED 2 | |
33 | #define TCQ_F_INGRESS 4 | |
34 | int padded; | |
35 | struct Qdisc_ops *ops; | |
36 | u32 handle; | |
37 | u32 parent; | |
38 | atomic_t refcnt; | |
39 | struct sk_buff_head q; | |
bb949fbd | 40 | struct netdev_queue *dev_queue; |
1da177e4 LT |
41 | struct net_device *dev; |
42 | struct list_head list; | |
43 | ||
44 | struct gnet_stats_basic bstats; | |
45 | struct gnet_stats_queue qstats; | |
46 | struct gnet_stats_rate_est rate_est; | |
47 | spinlock_t *stats_lock; | |
48 | struct rcu_head q_rcu; | |
49 | int (*reshape_fail)(struct sk_buff *skb, | |
50 | struct Qdisc *q); | |
51 | ||
52 | /* This field is deprecated, but it is still used by CBQ | |
53 | * and it will live until better solution will be invented. | |
54 | */ | |
55 | struct Qdisc *__parent; | |
56 | }; | |
57 | ||
58 | struct Qdisc_class_ops | |
59 | { | |
60 | /* Child qdisc manipulation */ | |
61 | int (*graft)(struct Qdisc *, unsigned long cl, | |
62 | struct Qdisc *, struct Qdisc **); | |
63 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 64 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
65 | |
66 | /* Class manipulation routines */ | |
67 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
68 | void (*put)(struct Qdisc *, unsigned long); | |
69 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 70 | struct nlattr **, unsigned long *); |
1da177e4 LT |
71 | int (*delete)(struct Qdisc *, unsigned long); |
72 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
73 | ||
74 | /* Filter manipulation */ | |
75 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); | |
76 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, | |
77 | u32 classid); | |
78 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
79 | ||
80 | /* rtnetlink specific */ | |
81 | int (*dump)(struct Qdisc *, unsigned long, | |
82 | struct sk_buff *skb, struct tcmsg*); | |
83 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
84 | struct gnet_dump *); | |
85 | }; | |
86 | ||
87 | struct Qdisc_ops | |
88 | { | |
89 | struct Qdisc_ops *next; | |
20fea08b | 90 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
91 | char id[IFNAMSIZ]; |
92 | int priv_size; | |
93 | ||
94 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
95 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
96 | int (*requeue)(struct sk_buff *, struct Qdisc *); | |
97 | unsigned int (*drop)(struct Qdisc *); | |
98 | ||
1e90474c | 99 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
100 | void (*reset)(struct Qdisc *); |
101 | void (*destroy)(struct Qdisc *); | |
1e90474c | 102 | int (*change)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
103 | |
104 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
105 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
106 | ||
107 | struct module *owner; | |
108 | }; | |
109 | ||
110 | ||
111 | struct tcf_result | |
112 | { | |
113 | unsigned long class; | |
114 | u32 classid; | |
115 | }; | |
116 | ||
117 | struct tcf_proto_ops | |
118 | { | |
119 | struct tcf_proto_ops *next; | |
120 | char kind[IFNAMSIZ]; | |
121 | ||
122 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
123 | struct tcf_result *); | |
124 | int (*init)(struct tcf_proto*); | |
125 | void (*destroy)(struct tcf_proto*); | |
126 | ||
127 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
128 | void (*put)(struct tcf_proto*, unsigned long); | |
129 | int (*change)(struct tcf_proto*, unsigned long, | |
add93b61 | 130 | u32 handle, struct nlattr **, |
1da177e4 LT |
131 | unsigned long *); |
132 | int (*delete)(struct tcf_proto*, unsigned long); | |
133 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
134 | ||
135 | /* rtnetlink specific */ | |
136 | int (*dump)(struct tcf_proto*, unsigned long, | |
137 | struct sk_buff *skb, struct tcmsg*); | |
138 | ||
139 | struct module *owner; | |
140 | }; | |
141 | ||
142 | struct tcf_proto | |
143 | { | |
144 | /* Fast access part */ | |
145 | struct tcf_proto *next; | |
146 | void *root; | |
147 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
148 | struct tcf_result *); | |
66c6f529 | 149 | __be16 protocol; |
1da177e4 LT |
150 | |
151 | /* All the rest */ | |
152 | u32 prio; | |
153 | u32 classid; | |
154 | struct Qdisc *q; | |
155 | void *data; | |
156 | struct tcf_proto_ops *ops; | |
157 | }; | |
158 | ||
159 | ||
160 | extern void qdisc_lock_tree(struct net_device *dev); | |
161 | extern void qdisc_unlock_tree(struct net_device *dev); | |
162 | ||
163 | #define sch_tree_lock(q) qdisc_lock_tree((q)->dev) | |
164 | #define sch_tree_unlock(q) qdisc_unlock_tree((q)->dev) | |
165 | #define tcf_tree_lock(tp) qdisc_lock_tree((tp)->q->dev) | |
166 | #define tcf_tree_unlock(tp) qdisc_unlock_tree((tp)->q->dev) | |
167 | ||
e41a33e6 TG |
168 | extern struct Qdisc noop_qdisc; |
169 | extern struct Qdisc_ops noop_qdisc_ops; | |
170 | ||
6fe1c7a5 PM |
171 | struct Qdisc_class_common |
172 | { | |
173 | u32 classid; | |
174 | struct hlist_node hnode; | |
175 | }; | |
176 | ||
177 | struct Qdisc_class_hash | |
178 | { | |
179 | struct hlist_head *hash; | |
180 | unsigned int hashsize; | |
181 | unsigned int hashmask; | |
182 | unsigned int hashelems; | |
183 | }; | |
184 | ||
185 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
186 | { | |
187 | id ^= id >> 8; | |
188 | id ^= id >> 4; | |
189 | return id & mask; | |
190 | } | |
191 | ||
192 | static inline struct Qdisc_class_common * | |
193 | qdisc_class_find(struct Qdisc_class_hash *hash, u32 id) | |
194 | { | |
195 | struct Qdisc_class_common *cl; | |
196 | struct hlist_node *n; | |
197 | unsigned int h; | |
198 | ||
199 | h = qdisc_class_hash(id, hash->hashmask); | |
200 | hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { | |
201 | if (cl->classid == id) | |
202 | return cl; | |
203 | } | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); | |
208 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
209 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
210 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
211 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
212 | ||
e41a33e6 TG |
213 | extern void dev_init_scheduler(struct net_device *dev); |
214 | extern void dev_shutdown(struct net_device *dev); | |
215 | extern void dev_activate(struct net_device *dev); | |
216 | extern void dev_deactivate(struct net_device *dev); | |
217 | extern void qdisc_reset(struct Qdisc *qdisc); | |
218 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
43effa1e | 219 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
bb949fbd DM |
220 | extern struct Qdisc *qdisc_alloc(struct net_device *dev, |
221 | struct netdev_queue *dev_queue, | |
222 | struct Qdisc_ops *ops); | |
e41a33e6 | 223 | extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, |
bb949fbd | 224 | struct netdev_queue *dev_queue, |
9f9afec4 | 225 | struct Qdisc_ops *ops, u32 parentid); |
a48b5a61 | 226 | extern void tcf_destroy(struct tcf_proto *tp); |
ff31ab56 | 227 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
1da177e4 | 228 | |
9972b25d TG |
229 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
230 | struct sk_buff_head *list) | |
231 | { | |
232 | __skb_queue_tail(list, skb); | |
233 | sch->qstats.backlog += skb->len; | |
234 | sch->bstats.bytes += skb->len; | |
235 | sch->bstats.packets++; | |
236 | ||
237 | return NET_XMIT_SUCCESS; | |
238 | } | |
239 | ||
240 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
241 | { | |
242 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
243 | } | |
244 | ||
245 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
246 | struct sk_buff_head *list) | |
247 | { | |
248 | struct sk_buff *skb = __skb_dequeue(list); | |
249 | ||
250 | if (likely(skb != NULL)) | |
251 | sch->qstats.backlog -= skb->len; | |
252 | ||
253 | return skb; | |
254 | } | |
255 | ||
256 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
257 | { | |
258 | return __qdisc_dequeue_head(sch, &sch->q); | |
259 | } | |
260 | ||
261 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
262 | struct sk_buff_head *list) | |
263 | { | |
264 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
265 | ||
266 | if (likely(skb != NULL)) | |
267 | sch->qstats.backlog -= skb->len; | |
268 | ||
269 | return skb; | |
270 | } | |
271 | ||
272 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
273 | { | |
274 | return __qdisc_dequeue_tail(sch, &sch->q); | |
275 | } | |
276 | ||
277 | static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch, | |
278 | struct sk_buff_head *list) | |
279 | { | |
280 | __skb_queue_head(list, skb); | |
281 | sch->qstats.backlog += skb->len; | |
282 | sch->qstats.requeues++; | |
283 | ||
284 | return NET_XMIT_SUCCESS; | |
285 | } | |
286 | ||
287 | static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch) | |
288 | { | |
289 | return __qdisc_requeue(skb, sch, &sch->q); | |
290 | } | |
291 | ||
292 | static inline void __qdisc_reset_queue(struct Qdisc *sch, | |
293 | struct sk_buff_head *list) | |
294 | { | |
295 | /* | |
296 | * We do not know the backlog in bytes of this list, it | |
297 | * is up to the caller to correct it | |
298 | */ | |
299 | skb_queue_purge(list); | |
300 | } | |
301 | ||
302 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
303 | { | |
304 | __qdisc_reset_queue(sch, &sch->q); | |
305 | sch->qstats.backlog = 0; | |
306 | } | |
307 | ||
308 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
309 | struct sk_buff_head *list) | |
310 | { | |
311 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
312 | ||
313 | if (likely(skb != NULL)) { | |
314 | unsigned int len = skb->len; | |
315 | kfree_skb(skb); | |
316 | return len; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
323 | { | |
324 | return __qdisc_queue_drop(sch, &sch->q); | |
325 | } | |
326 | ||
327 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
328 | { | |
329 | kfree_skb(skb); | |
330 | sch->qstats.drops++; | |
331 | ||
332 | return NET_XMIT_DROP; | |
333 | } | |
334 | ||
335 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
336 | { | |
337 | sch->qstats.drops++; | |
338 | ||
c3bc7cff | 339 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
340 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
341 | goto drop; | |
342 | ||
343 | return NET_XMIT_SUCCESS; | |
344 | ||
345 | drop: | |
346 | #endif | |
347 | kfree_skb(skb); | |
348 | return NET_XMIT_DROP; | |
349 | } | |
350 | ||
e9bef55d JDB |
351 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
352 | long it will take to send a packet given its size. | |
353 | */ | |
354 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
355 | { | |
e08b0998 JDB |
356 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
357 | if (slot < 0) | |
358 | slot = 0; | |
e9bef55d JDB |
359 | slot >>= rtab->rate.cell_log; |
360 | if (slot > 255) | |
361 | return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]); | |
362 | return rtab->data[slot]; | |
363 | } | |
364 | ||
12da81d1 JHS |
365 | #ifdef CONFIG_NET_CLS_ACT |
366 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask) | |
367 | { | |
368 | struct sk_buff *n = skb_clone(skb, gfp_mask); | |
369 | ||
370 | if (n) { | |
371 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
372 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
373 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
374 | } |
375 | return n; | |
376 | } | |
377 | #endif | |
378 | ||
1da177e4 | 379 | #endif |