1 #ifndef __NET_SCHED_GENERIC_H
2 #define __NET_SCHED_GENERIC_H
4 #include <linux/netdevice.h>
5 #include <linux/types.h>
6 #include <linux/rcupdate.h>
7 #include <linux/module.h>
8 #include <linux/rtnetlink.h>
9 #include <linux/pkt_sched.h>
10 #include <linux/pkt_cls.h>
11 #include <net/gen_stats.h>
18 struct qdisc_rate_table
20 struct tc_ratespec rate;
22 struct qdisc_rate_table *next;
28 int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev);
29 struct sk_buff * (*dequeue)(struct Qdisc *dev);
31 #define TCQ_F_BUILTIN 1
32 #define TCQ_F_THROTTLED 2
33 #define TCQ_F_INGRESS 4
35 struct Qdisc_ops *ops;
39 struct sk_buff_head q;
40 struct net_device *dev;
41 struct list_head list;
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,
51 /* This field is deprecated, but it is still used by CBQ
52 * and it will live until better solution will be invented.
54 struct Qdisc *__parent;
57 struct Qdisc_class_ops
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);
64 /* Class manipulation routines */
65 unsigned long (*get)(struct Qdisc *, u32 classid);
66 void (*put)(struct Qdisc *, unsigned long);
67 int (*change)(struct Qdisc *, u32, u32,
68 struct rtattr **, unsigned long *);
69 int (*delete)(struct Qdisc *, unsigned long);
70 void (*walk)(struct Qdisc *, struct qdisc_walker * arg);
72 /* Filter manipulation */
73 struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long);
74 unsigned long (*bind_tcf)(struct Qdisc *, unsigned long,
76 void (*unbind_tcf)(struct Qdisc *, unsigned long);
78 /* rtnetlink specific */
79 int (*dump)(struct Qdisc *, unsigned long,
80 struct sk_buff *skb, struct tcmsg*);
81 int (*dump_stats)(struct Qdisc *, unsigned long,
87 struct Qdisc_ops *next;
88 struct Qdisc_class_ops *cl_ops;
92 int (*enqueue)(struct sk_buff *, struct Qdisc *);
93 struct sk_buff * (*dequeue)(struct Qdisc *);
94 int (*requeue)(struct sk_buff *, struct Qdisc *);
95 unsigned int (*drop)(struct Qdisc *);
97 int (*init)(struct Qdisc *, struct rtattr *arg);
98 void (*reset)(struct Qdisc *);
99 void (*destroy)(struct Qdisc *);
100 int (*change)(struct Qdisc *, struct rtattr *arg);
102 int (*dump)(struct Qdisc *, struct sk_buff *);
103 int (*dump_stats)(struct Qdisc *, struct gnet_dump *);
105 struct module *owner;
117 struct tcf_proto_ops *next;
120 int (*classify)(struct sk_buff*, struct tcf_proto*,
121 struct tcf_result *);
122 int (*init)(struct tcf_proto*);
123 void (*destroy)(struct tcf_proto*);
125 unsigned long (*get)(struct tcf_proto*, u32 handle);
126 void (*put)(struct tcf_proto*, unsigned long);
127 int (*change)(struct tcf_proto*, unsigned long,
128 u32 handle, struct rtattr **,
130 int (*delete)(struct tcf_proto*, unsigned long);
131 void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
133 /* rtnetlink specific */
134 int (*dump)(struct tcf_proto*, unsigned long,
135 struct sk_buff *skb, struct tcmsg*);
137 struct module *owner;
142 /* Fast access part */
143 struct tcf_proto *next;
145 int (*classify)(struct sk_buff*, struct tcf_proto*,
146 struct tcf_result *);
154 struct tcf_proto_ops *ops;
158 extern void qdisc_lock_tree(struct net_device *dev);
159 extern void qdisc_unlock_tree(struct net_device *dev);
161 #define sch_tree_lock(q) qdisc_lock_tree((q)->dev)
162 #define sch_tree_unlock(q) qdisc_unlock_tree((q)->dev)
163 #define tcf_tree_lock(tp) qdisc_lock_tree((tp)->q->dev)
164 #define tcf_tree_unlock(tp) qdisc_unlock_tree((tp)->q->dev)
166 extern struct Qdisc noop_qdisc;
167 extern struct Qdisc_ops noop_qdisc_ops;
169 extern void dev_init_scheduler(struct net_device *dev);
170 extern void dev_shutdown(struct net_device *dev);
171 extern void dev_activate(struct net_device *dev);
172 extern void dev_deactivate(struct net_device *dev);
173 extern void qdisc_reset(struct Qdisc *qdisc);
174 extern void qdisc_destroy(struct Qdisc *qdisc);
175 extern struct Qdisc *qdisc_alloc(struct net_device *dev, struct Qdisc_ops *ops);
176 extern struct Qdisc *qdisc_create_dflt(struct net_device *dev,
177 struct Qdisc_ops *ops);
180 tcf_destroy(struct tcf_proto *tp)
182 tp->ops->destroy(tp);
183 module_put(tp->ops->owner);
187 static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
188 struct sk_buff_head *list)
190 __skb_queue_tail(list, skb);
191 sch->qstats.backlog += skb->len;
192 sch->bstats.bytes += skb->len;
193 sch->bstats.packets++;
195 return NET_XMIT_SUCCESS;
198 static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
200 return __qdisc_enqueue_tail(skb, sch, &sch->q);
203 static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch,
204 struct sk_buff_head *list)
206 struct sk_buff *skb = __skb_dequeue(list);
208 if (likely(skb != NULL))
209 sch->qstats.backlog -= skb->len;
214 static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
216 return __qdisc_dequeue_head(sch, &sch->q);
219 static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch,
220 struct sk_buff_head *list)
222 struct sk_buff *skb = __skb_dequeue_tail(list);
224 if (likely(skb != NULL))
225 sch->qstats.backlog -= skb->len;
230 static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch)
232 return __qdisc_dequeue_tail(sch, &sch->q);
235 static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch,
236 struct sk_buff_head *list)
238 __skb_queue_head(list, skb);
239 sch->qstats.backlog += skb->len;
240 sch->qstats.requeues++;
242 return NET_XMIT_SUCCESS;
245 static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch)
247 return __qdisc_requeue(skb, sch, &sch->q);
250 static inline void __qdisc_reset_queue(struct Qdisc *sch,
251 struct sk_buff_head *list)
254 * We do not know the backlog in bytes of this list, it
255 * is up to the caller to correct it
257 skb_queue_purge(list);
260 static inline void qdisc_reset_queue(struct Qdisc *sch)
262 __qdisc_reset_queue(sch, &sch->q);
263 sch->qstats.backlog = 0;
266 static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
267 struct sk_buff_head *list)
269 struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
271 if (likely(skb != NULL)) {
272 unsigned int len = skb->len;
280 static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
282 return __qdisc_queue_drop(sch, &sch->q);
285 static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
290 return NET_XMIT_DROP;
293 static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch)
297 #ifdef CONFIG_NET_CLS_POLICE
298 if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch))
301 return NET_XMIT_SUCCESS;
306 return NET_XMIT_DROP;