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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; | |
40 | struct net_device *dev; | |
41 | struct list_head list; | |
42 | ||
43 | struct gnet_stats_basic bstats; | |
44 | struct gnet_stats_queue qstats; | |
45 | struct gnet_stats_rate_est rate_est; | |
46 | spinlock_t *stats_lock; | |
47 | struct rcu_head q_rcu; | |
48 | int (*reshape_fail)(struct sk_buff *skb, | |
49 | struct Qdisc *q); | |
50 | ||
51 | /* This field is deprecated, but it is still used by CBQ | |
52 | * and it will live until better solution will be invented. | |
53 | */ | |
54 | struct Qdisc *__parent; | |
55 | }; | |
56 | ||
57 | struct Qdisc_class_ops | |
58 | { | |
59 | /* Child qdisc manipulation */ | |
60 | int (*graft)(struct Qdisc *, unsigned long cl, | |
61 | struct Qdisc *, struct Qdisc **); | |
62 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 63 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
64 | |
65 | /* Class manipulation routines */ | |
66 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
67 | void (*put)(struct Qdisc *, unsigned long); | |
68 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 69 | struct nlattr **, unsigned long *); |
1da177e4 LT |
70 | int (*delete)(struct Qdisc *, unsigned long); |
71 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
72 | ||
73 | /* Filter manipulation */ | |
74 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); | |
75 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, | |
76 | u32 classid); | |
77 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
78 | ||
79 | /* rtnetlink specific */ | |
80 | int (*dump)(struct Qdisc *, unsigned long, | |
81 | struct sk_buff *skb, struct tcmsg*); | |
82 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
83 | struct gnet_dump *); | |
84 | }; | |
85 | ||
86 | struct Qdisc_ops | |
87 | { | |
88 | struct Qdisc_ops *next; | |
20fea08b | 89 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
90 | char id[IFNAMSIZ]; |
91 | int priv_size; | |
92 | ||
93 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
94 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
95 | int (*requeue)(struct sk_buff *, struct Qdisc *); | |
96 | unsigned int (*drop)(struct Qdisc *); | |
97 | ||
1e90474c | 98 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
99 | void (*reset)(struct Qdisc *); |
100 | void (*destroy)(struct Qdisc *); | |
1e90474c | 101 | int (*change)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
102 | |
103 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
104 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
105 | ||
106 | struct module *owner; | |
107 | }; | |
108 | ||
109 | ||
110 | struct tcf_result | |
111 | { | |
112 | unsigned long class; | |
113 | u32 classid; | |
114 | }; | |
115 | ||
116 | struct tcf_proto_ops | |
117 | { | |
118 | struct tcf_proto_ops *next; | |
119 | char kind[IFNAMSIZ]; | |
120 | ||
121 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
122 | struct tcf_result *); | |
123 | int (*init)(struct tcf_proto*); | |
124 | void (*destroy)(struct tcf_proto*); | |
125 | ||
126 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
127 | void (*put)(struct tcf_proto*, unsigned long); | |
128 | int (*change)(struct tcf_proto*, unsigned long, | |
add93b61 | 129 | u32 handle, struct nlattr **, |
1da177e4 LT |
130 | unsigned long *); |
131 | int (*delete)(struct tcf_proto*, unsigned long); | |
132 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
133 | ||
134 | /* rtnetlink specific */ | |
135 | int (*dump)(struct tcf_proto*, unsigned long, | |
136 | struct sk_buff *skb, struct tcmsg*); | |
137 | ||
138 | struct module *owner; | |
139 | }; | |
140 | ||
141 | struct tcf_proto | |
142 | { | |
143 | /* Fast access part */ | |
144 | struct tcf_proto *next; | |
145 | void *root; | |
146 | int (*classify)(struct sk_buff*, struct tcf_proto*, | |
147 | struct tcf_result *); | |
66c6f529 | 148 | __be16 protocol; |
1da177e4 LT |
149 | |
150 | /* All the rest */ | |
151 | u32 prio; | |
152 | u32 classid; | |
153 | struct Qdisc *q; | |
154 | void *data; | |
155 | struct tcf_proto_ops *ops; | |
156 | }; | |
157 | ||
158 | ||
159 | extern void qdisc_lock_tree(struct net_device *dev); | |
160 | extern void qdisc_unlock_tree(struct net_device *dev); | |
161 | ||
162 | #define sch_tree_lock(q) qdisc_lock_tree((q)->dev) | |
163 | #define sch_tree_unlock(q) qdisc_unlock_tree((q)->dev) | |
164 | #define tcf_tree_lock(tp) qdisc_lock_tree((tp)->q->dev) | |
165 | #define tcf_tree_unlock(tp) qdisc_unlock_tree((tp)->q->dev) | |
166 | ||
e41a33e6 TG |
167 | extern struct Qdisc noop_qdisc; |
168 | extern struct Qdisc_ops noop_qdisc_ops; | |
169 | ||
6fe1c7a5 PM |
170 | struct Qdisc_class_common |
171 | { | |
172 | u32 classid; | |
173 | struct hlist_node hnode; | |
174 | }; | |
175 | ||
176 | struct Qdisc_class_hash | |
177 | { | |
178 | struct hlist_head *hash; | |
179 | unsigned int hashsize; | |
180 | unsigned int hashmask; | |
181 | unsigned int hashelems; | |
182 | }; | |
183 | ||
184 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
185 | { | |
186 | id ^= id >> 8; | |
187 | id ^= id >> 4; | |
188 | return id & mask; | |
189 | } | |
190 | ||
191 | static inline struct Qdisc_class_common * | |
192 | qdisc_class_find(struct Qdisc_class_hash *hash, u32 id) | |
193 | { | |
194 | struct Qdisc_class_common *cl; | |
195 | struct hlist_node *n; | |
196 | unsigned int h; | |
197 | ||
198 | h = qdisc_class_hash(id, hash->hashmask); | |
199 | hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { | |
200 | if (cl->classid == id) | |
201 | return cl; | |
202 | } | |
203 | return NULL; | |
204 | } | |
205 | ||
206 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); | |
207 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
208 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
209 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
210 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
211 | ||
e41a33e6 TG |
212 | extern void dev_init_scheduler(struct net_device *dev); |
213 | extern void dev_shutdown(struct net_device *dev); | |
214 | extern void dev_activate(struct net_device *dev); | |
215 | extern void dev_deactivate(struct net_device *dev); | |
216 | extern void qdisc_reset(struct Qdisc *qdisc); | |
217 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
43effa1e | 218 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
3d54b82f | 219 | extern struct Qdisc *qdisc_alloc(struct net_device *dev, struct Qdisc_ops *ops); |
e41a33e6 | 220 | extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, |
9f9afec4 | 221 | struct Qdisc_ops *ops, u32 parentid); |
a48b5a61 | 222 | extern void tcf_destroy(struct tcf_proto *tp); |
ff31ab56 | 223 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
1da177e4 | 224 | |
9972b25d TG |
225 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
226 | struct sk_buff_head *list) | |
227 | { | |
228 | __skb_queue_tail(list, skb); | |
229 | sch->qstats.backlog += skb->len; | |
230 | sch->bstats.bytes += skb->len; | |
231 | sch->bstats.packets++; | |
232 | ||
233 | return NET_XMIT_SUCCESS; | |
234 | } | |
235 | ||
236 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
237 | { | |
238 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
239 | } | |
240 | ||
241 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
242 | struct sk_buff_head *list) | |
243 | { | |
244 | struct sk_buff *skb = __skb_dequeue(list); | |
245 | ||
246 | if (likely(skb != NULL)) | |
247 | sch->qstats.backlog -= skb->len; | |
248 | ||
249 | return skb; | |
250 | } | |
251 | ||
252 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
253 | { | |
254 | return __qdisc_dequeue_head(sch, &sch->q); | |
255 | } | |
256 | ||
257 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
258 | struct sk_buff_head *list) | |
259 | { | |
260 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
261 | ||
262 | if (likely(skb != NULL)) | |
263 | sch->qstats.backlog -= skb->len; | |
264 | ||
265 | return skb; | |
266 | } | |
267 | ||
268 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
269 | { | |
270 | return __qdisc_dequeue_tail(sch, &sch->q); | |
271 | } | |
272 | ||
273 | static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch, | |
274 | struct sk_buff_head *list) | |
275 | { | |
276 | __skb_queue_head(list, skb); | |
277 | sch->qstats.backlog += skb->len; | |
278 | sch->qstats.requeues++; | |
279 | ||
280 | return NET_XMIT_SUCCESS; | |
281 | } | |
282 | ||
283 | static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch) | |
284 | { | |
285 | return __qdisc_requeue(skb, sch, &sch->q); | |
286 | } | |
287 | ||
288 | static inline void __qdisc_reset_queue(struct Qdisc *sch, | |
289 | struct sk_buff_head *list) | |
290 | { | |
291 | /* | |
292 | * We do not know the backlog in bytes of this list, it | |
293 | * is up to the caller to correct it | |
294 | */ | |
295 | skb_queue_purge(list); | |
296 | } | |
297 | ||
298 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
299 | { | |
300 | __qdisc_reset_queue(sch, &sch->q); | |
301 | sch->qstats.backlog = 0; | |
302 | } | |
303 | ||
304 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
305 | struct sk_buff_head *list) | |
306 | { | |
307 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
308 | ||
309 | if (likely(skb != NULL)) { | |
310 | unsigned int len = skb->len; | |
311 | kfree_skb(skb); | |
312 | return len; | |
313 | } | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
319 | { | |
320 | return __qdisc_queue_drop(sch, &sch->q); | |
321 | } | |
322 | ||
323 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
324 | { | |
325 | kfree_skb(skb); | |
326 | sch->qstats.drops++; | |
327 | ||
328 | return NET_XMIT_DROP; | |
329 | } | |
330 | ||
331 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
332 | { | |
333 | sch->qstats.drops++; | |
334 | ||
c3bc7cff | 335 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
336 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
337 | goto drop; | |
338 | ||
339 | return NET_XMIT_SUCCESS; | |
340 | ||
341 | drop: | |
342 | #endif | |
343 | kfree_skb(skb); | |
344 | return NET_XMIT_DROP; | |
345 | } | |
346 | ||
e9bef55d JDB |
347 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
348 | long it will take to send a packet given its size. | |
349 | */ | |
350 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
351 | { | |
e08b0998 JDB |
352 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
353 | if (slot < 0) | |
354 | slot = 0; | |
e9bef55d JDB |
355 | slot >>= rtab->rate.cell_log; |
356 | if (slot > 255) | |
357 | return (rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]); | |
358 | return rtab->data[slot]; | |
359 | } | |
360 | ||
12da81d1 JHS |
361 | #ifdef CONFIG_NET_CLS_ACT |
362 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask) | |
363 | { | |
364 | struct sk_buff *n = skb_clone(skb, gfp_mask); | |
365 | ||
366 | if (n) { | |
367 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
368 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
369 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
370 | } |
371 | return n; | |
372 | } | |
373 | #endif | |
374 | ||
1da177e4 | 375 | #endif |