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1da177e4 LT |
1 | #ifndef __NET_SCHED_GENERIC_H |
2 | #define __NET_SCHED_GENERIC_H | |
3 | ||
4 | #include <linux/config.h> | |
5 | #include <linux/netdevice.h> | |
6 | #include <linux/types.h> | |
7 | #include <linux/rcupdate.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/rtnetlink.h> | |
10 | #include <linux/pkt_sched.h> | |
11 | #include <linux/pkt_cls.h> | |
12 | #include <net/gen_stats.h> | |
13 | ||
14 | struct Qdisc_ops; | |
15 | struct qdisc_walker; | |
16 | struct tcf_walker; | |
17 | struct module; | |
18 | ||
19 | struct qdisc_rate_table | |
20 | { | |
21 | struct tc_ratespec rate; | |
22 | u32 data[256]; | |
23 | struct qdisc_rate_table *next; | |
24 | int refcnt; | |
25 | }; | |
26 | ||
27 | struct Qdisc | |
28 | { | |
29 | int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); | |
30 | struct sk_buff * (*dequeue)(struct Qdisc *dev); | |
31 | unsigned flags; | |
32 | #define TCQ_F_BUILTIN 1 | |
33 | #define TCQ_F_THROTTLED 2 | |
34 | #define TCQ_F_INGRESS 4 | |
35 | int padded; | |
36 | struct Qdisc_ops *ops; | |
37 | u32 handle; | |
38 | u32 parent; | |
39 | atomic_t refcnt; | |
40 | struct sk_buff_head q; | |
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); | |
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, | |
69 | struct rtattr **, unsigned long *); | |
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; | |
89 | struct Qdisc_class_ops *cl_ops; | |
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 | ||
98 | int (*init)(struct Qdisc *, struct rtattr *arg); | |
99 | void (*reset)(struct Qdisc *); | |
100 | void (*destroy)(struct Qdisc *); | |
101 | int (*change)(struct Qdisc *, struct rtattr *arg); | |
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, | |
129 | u32 handle, struct rtattr **, | |
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 *); | |
148 | u32 protocol; | |
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 | ||
170 | extern void dev_init_scheduler(struct net_device *dev); | |
171 | extern void dev_shutdown(struct net_device *dev); | |
172 | extern void dev_activate(struct net_device *dev); | |
173 | extern void dev_deactivate(struct net_device *dev); | |
174 | extern void qdisc_reset(struct Qdisc *qdisc); | |
175 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
176 | extern struct Qdisc *qdisc_create_dflt(struct net_device *dev, | |
177 | struct Qdisc_ops *ops); | |
178 | ||
1da177e4 LT |
179 | static inline void |
180 | tcf_destroy(struct tcf_proto *tp) | |
181 | { | |
182 | tp->ops->destroy(tp); | |
183 | module_put(tp->ops->owner); | |
184 | kfree(tp); | |
185 | } | |
186 | ||
9972b25d TG |
187 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
188 | struct sk_buff_head *list) | |
189 | { | |
190 | __skb_queue_tail(list, skb); | |
191 | sch->qstats.backlog += skb->len; | |
192 | sch->bstats.bytes += skb->len; | |
193 | sch->bstats.packets++; | |
194 | ||
195 | return NET_XMIT_SUCCESS; | |
196 | } | |
197 | ||
198 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
199 | { | |
200 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
201 | } | |
202 | ||
203 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
204 | struct sk_buff_head *list) | |
205 | { | |
206 | struct sk_buff *skb = __skb_dequeue(list); | |
207 | ||
208 | if (likely(skb != NULL)) | |
209 | sch->qstats.backlog -= skb->len; | |
210 | ||
211 | return skb; | |
212 | } | |
213 | ||
214 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
215 | { | |
216 | return __qdisc_dequeue_head(sch, &sch->q); | |
217 | } | |
218 | ||
219 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
220 | struct sk_buff_head *list) | |
221 | { | |
222 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
223 | ||
224 | if (likely(skb != NULL)) | |
225 | sch->qstats.backlog -= skb->len; | |
226 | ||
227 | return skb; | |
228 | } | |
229 | ||
230 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
231 | { | |
232 | return __qdisc_dequeue_tail(sch, &sch->q); | |
233 | } | |
234 | ||
235 | static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch, | |
236 | struct sk_buff_head *list) | |
237 | { | |
238 | __skb_queue_head(list, skb); | |
239 | sch->qstats.backlog += skb->len; | |
240 | sch->qstats.requeues++; | |
241 | ||
242 | return NET_XMIT_SUCCESS; | |
243 | } | |
244 | ||
245 | static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch) | |
246 | { | |
247 | return __qdisc_requeue(skb, sch, &sch->q); | |
248 | } | |
249 | ||
250 | static inline void __qdisc_reset_queue(struct Qdisc *sch, | |
251 | struct sk_buff_head *list) | |
252 | { | |
253 | /* | |
254 | * We do not know the backlog in bytes of this list, it | |
255 | * is up to the caller to correct it | |
256 | */ | |
257 | skb_queue_purge(list); | |
258 | } | |
259 | ||
260 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
261 | { | |
262 | __qdisc_reset_queue(sch, &sch->q); | |
263 | sch->qstats.backlog = 0; | |
264 | } | |
265 | ||
266 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
267 | struct sk_buff_head *list) | |
268 | { | |
269 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
270 | ||
271 | if (likely(skb != NULL)) { | |
272 | unsigned int len = skb->len; | |
273 | kfree_skb(skb); | |
274 | return len; | |
275 | } | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
281 | { | |
282 | return __qdisc_queue_drop(sch, &sch->q); | |
283 | } | |
284 | ||
285 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
286 | { | |
287 | kfree_skb(skb); | |
288 | sch->qstats.drops++; | |
289 | ||
290 | return NET_XMIT_DROP; | |
291 | } | |
292 | ||
293 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
294 | { | |
295 | sch->qstats.drops++; | |
296 | ||
297 | #ifdef CONFIG_NET_CLS_POLICE | |
298 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) | |
299 | goto drop; | |
300 | ||
301 | return NET_XMIT_SUCCESS; | |
302 | ||
303 | drop: | |
304 | #endif | |
305 | kfree_skb(skb); | |
306 | return NET_XMIT_DROP; | |
307 | } | |
308 | ||
1da177e4 | 309 | #endif |