tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
14struct Qdisc_ops;
15struct qdisc_walker;
16struct tcf_walker;
17struct module;
18
19struct qdisc_rate_table
20{
21 struct tc_ratespec rate;
22 u32 data[256];
23 struct qdisc_rate_table *next;
24 int refcnt;
25};
26
27struct 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
58struct 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
86struct 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
110struct tcf_result
111{
112 unsigned long class;
113 u32 classid;
114};
115
116struct 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
141struct 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
159extern void qdisc_lock_tree(struct net_device *dev);
160extern 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
167static inline void
168tcf_destroy(struct tcf_proto *tp)
169{
170 tp->ops->destroy(tp);
171 module_put(tp->ops->owner);
172 kfree(tp);
173}
174
175static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,
176 struct sk_buff_head *list)
177{
178 __skb_queue_tail(list, skb);
179 sch->qstats.backlog += skb->len;
180 sch->bstats.bytes += skb->len;
181 sch->bstats.packets++;
182
183 return NET_XMIT_SUCCESS;
184}
185
186static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch)
187{
188 return __qdisc_enqueue_tail(skb, sch, &sch->q);
189}
190
191static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch,
192 struct sk_buff_head *list)
193{
194 struct sk_buff *skb = __skb_dequeue(list);
195
196 if (likely(skb != NULL))
197 sch->qstats.backlog -= skb->len;
198
199 return skb;
200}
201
202static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch)
203{
204 return __qdisc_dequeue_head(sch, &sch->q);
205}
206
207static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch,
208 struct sk_buff_head *list)
209{
210 struct sk_buff *skb = __skb_dequeue_tail(list);
211
212 if (likely(skb != NULL))
213 sch->qstats.backlog -= skb->len;
214
215 return skb;
216}
217
218static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch)
219{
220 return __qdisc_dequeue_tail(sch, &sch->q);
221}
222
223static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch,
224 struct sk_buff_head *list)
225{
226 __skb_queue_head(list, skb);
227 sch->qstats.backlog += skb->len;
228 sch->qstats.requeues++;
229
230 return NET_XMIT_SUCCESS;
231}
232
233static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch)
234{
235 return __qdisc_requeue(skb, sch, &sch->q);
236}
237
238static inline void __qdisc_reset_queue(struct Qdisc *sch,
239 struct sk_buff_head *list)
240{
241 /*
242 * We do not know the backlog in bytes of this list, it
243 * is up to the caller to correct it
244 */
245 skb_queue_purge(list);
246}
247
248static inline void qdisc_reset_queue(struct Qdisc *sch)
249{
250 __qdisc_reset_queue(sch, &sch->q);
251 sch->qstats.backlog = 0;
252}
253
254static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch,
255 struct sk_buff_head *list)
256{
257 struct sk_buff *skb = __qdisc_dequeue_tail(sch, list);
258
259 if (likely(skb != NULL)) {
260 unsigned int len = skb->len;
261 kfree_skb(skb);
262 return len;
263 }
264
265 return 0;
266}
267
268static inline unsigned int qdisc_queue_drop(struct Qdisc *sch)
269{
270 return __qdisc_queue_drop(sch, &sch->q);
271}
272
273static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch)
274{
275 kfree_skb(skb);
276 sch->qstats.drops++;
277
278 return NET_XMIT_DROP;
279}
280
281static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch)
282{
283 sch->qstats.drops++;
284
285#ifdef CONFIG_NET_CLS_POLICE
286 if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch))
287 goto drop;
288
289 return NET_XMIT_SUCCESS;
290
291drop:
292#endif
293 kfree_skb(skb);
294 return NET_XMIT_DROP;
295}
296
297#endif