Commit | Line | Data |
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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> | |
1da177e4 LT |
7 | #include <linux/pkt_sched.h> |
8 | #include <linux/pkt_cls.h> | |
9 | #include <net/gen_stats.h> | |
be577ddc | 10 | #include <net/rtnetlink.h> |
1da177e4 LT |
11 | |
12 | struct Qdisc_ops; | |
13 | struct qdisc_walker; | |
14 | struct tcf_walker; | |
15 | struct module; | |
16 | ||
fd2c3ef7 | 17 | struct qdisc_rate_table { |
1da177e4 LT |
18 | struct tc_ratespec rate; |
19 | u32 data[256]; | |
20 | struct qdisc_rate_table *next; | |
21 | int refcnt; | |
22 | }; | |
23 | ||
fd2c3ef7 | 24 | enum qdisc_state_t { |
37437bb2 | 25 | __QDISC_STATE_SCHED, |
a9312ae8 | 26 | __QDISC_STATE_DEACTIVATED, |
ef352e7c | 27 | __QDISC_STATE_THROTTLED, |
e2627c8c DM |
28 | }; |
29 | ||
37112105 ED |
30 | /* |
31 | * following bits are only changed while qdisc lock is held | |
32 | */ | |
33 | enum qdisc___state_t { | |
fd245a4a | 34 | __QDISC___STATE_RUNNING = 1, |
37112105 ED |
35 | }; |
36 | ||
175f9c1b | 37 | struct qdisc_size_table { |
a2da570d | 38 | struct rcu_head rcu; |
175f9c1b JK |
39 | struct list_head list; |
40 | struct tc_sizespec szopts; | |
41 | int refcnt; | |
42 | u16 data[]; | |
43 | }; | |
44 | ||
fd2c3ef7 | 45 | struct Qdisc { |
1da177e4 LT |
46 | int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); |
47 | struct sk_buff * (*dequeue)(struct Qdisc *dev); | |
05bdd2f1 | 48 | unsigned int flags; |
b00355db | 49 | #define TCQ_F_BUILTIN 1 |
fd245a4a ED |
50 | #define TCQ_F_INGRESS 2 |
51 | #define TCQ_F_CAN_BYPASS 4 | |
52 | #define TCQ_F_MQROOT 8 | |
b00355db | 53 | #define TCQ_F_WARN_NONWC (1 << 16) |
1da177e4 | 54 | int padded; |
05bdd2f1 | 55 | const struct Qdisc_ops *ops; |
a2da570d | 56 | struct qdisc_size_table __rcu *stab; |
5e140dfc | 57 | struct list_head list; |
1da177e4 LT |
58 | u32 handle; |
59 | u32 parent; | |
60 | atomic_t refcnt; | |
1da177e4 | 61 | struct gnet_stats_rate_est rate_est; |
1da177e4 LT |
62 | int (*reshape_fail)(struct sk_buff *skb, |
63 | struct Qdisc *q); | |
64 | ||
72b25a91 DM |
65 | void *u32_node; |
66 | ||
1da177e4 LT |
67 | /* This field is deprecated, but it is still used by CBQ |
68 | * and it will live until better solution will be invented. | |
69 | */ | |
70 | struct Qdisc *__parent; | |
5e140dfc ED |
71 | struct netdev_queue *dev_queue; |
72 | struct Qdisc *next_sched; | |
73 | ||
74 | struct sk_buff *gso_skb; | |
75 | /* | |
76 | * For performance sake on SMP, we put highly modified fields at the end | |
77 | */ | |
78 | unsigned long state; | |
79 | struct sk_buff_head q; | |
c1a8f1f1 | 80 | struct gnet_stats_basic_packed bstats; |
fd245a4a | 81 | unsigned int __state; |
5e140dfc | 82 | struct gnet_stats_queue qstats; |
79640a4c ED |
83 | struct rcu_head rcu_head; |
84 | spinlock_t busylock; | |
d276055c | 85 | u32 limit; |
1da177e4 LT |
86 | }; |
87 | ||
fd245a4a | 88 | static inline bool qdisc_is_running(const struct Qdisc *qdisc) |
bc135b23 | 89 | { |
fd245a4a | 90 | return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false; |
bc135b23 ED |
91 | } |
92 | ||
93 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) | |
94 | { | |
fd245a4a ED |
95 | if (qdisc_is_running(qdisc)) |
96 | return false; | |
97 | qdisc->__state |= __QDISC___STATE_RUNNING; | |
98 | return true; | |
bc135b23 ED |
99 | } |
100 | ||
101 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
102 | { | |
fd245a4a ED |
103 | qdisc->__state &= ~__QDISC___STATE_RUNNING; |
104 | } | |
105 | ||
106 | static inline bool qdisc_is_throttled(const struct Qdisc *qdisc) | |
107 | { | |
ef352e7c | 108 | return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false; |
fd245a4a ED |
109 | } |
110 | ||
111 | static inline void qdisc_throttled(struct Qdisc *qdisc) | |
112 | { | |
ef352e7c | 113 | set_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
fd245a4a ED |
114 | } |
115 | ||
116 | static inline void qdisc_unthrottled(struct Qdisc *qdisc) | |
117 | { | |
ef352e7c | 118 | clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
bc135b23 ED |
119 | } |
120 | ||
fd2c3ef7 | 121 | struct Qdisc_class_ops { |
1da177e4 | 122 | /* Child qdisc manipulation */ |
926e61b7 | 123 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 LT |
124 | int (*graft)(struct Qdisc *, unsigned long cl, |
125 | struct Qdisc *, struct Qdisc **); | |
126 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 127 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
128 | |
129 | /* Class manipulation routines */ | |
130 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
131 | void (*put)(struct Qdisc *, unsigned long); | |
132 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 133 | struct nlattr **, unsigned long *); |
1da177e4 LT |
134 | int (*delete)(struct Qdisc *, unsigned long); |
135 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
136 | ||
137 | /* Filter manipulation */ | |
138 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); | |
139 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, | |
140 | u32 classid); | |
141 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
142 | ||
143 | /* rtnetlink specific */ | |
144 | int (*dump)(struct Qdisc *, unsigned long, | |
145 | struct sk_buff *skb, struct tcmsg*); | |
146 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
147 | struct gnet_dump *); | |
148 | }; | |
149 | ||
fd2c3ef7 | 150 | struct Qdisc_ops { |
1da177e4 | 151 | struct Qdisc_ops *next; |
20fea08b | 152 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
153 | char id[IFNAMSIZ]; |
154 | int priv_size; | |
155 | ||
156 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
157 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
90d841fd | 158 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 LT |
159 | unsigned int (*drop)(struct Qdisc *); |
160 | ||
1e90474c | 161 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
162 | void (*reset)(struct Qdisc *); |
163 | void (*destroy)(struct Qdisc *); | |
1e90474c | 164 | int (*change)(struct Qdisc *, struct nlattr *arg); |
6ec1c69a | 165 | void (*attach)(struct Qdisc *); |
1da177e4 LT |
166 | |
167 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
168 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
169 | ||
170 | struct module *owner; | |
171 | }; | |
172 | ||
173 | ||
fd2c3ef7 | 174 | struct tcf_result { |
1da177e4 LT |
175 | unsigned long class; |
176 | u32 classid; | |
177 | }; | |
178 | ||
fd2c3ef7 | 179 | struct tcf_proto_ops { |
1da177e4 LT |
180 | struct tcf_proto_ops *next; |
181 | char kind[IFNAMSIZ]; | |
182 | ||
dc7f9f6e ED |
183 | int (*classify)(struct sk_buff *, |
184 | const struct tcf_proto *, | |
185 | struct tcf_result *); | |
1da177e4 LT |
186 | int (*init)(struct tcf_proto*); |
187 | void (*destroy)(struct tcf_proto*); | |
188 | ||
189 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
190 | void (*put)(struct tcf_proto*, unsigned long); | |
191 | int (*change)(struct tcf_proto*, unsigned long, | |
add93b61 | 192 | u32 handle, struct nlattr **, |
1da177e4 LT |
193 | unsigned long *); |
194 | int (*delete)(struct tcf_proto*, unsigned long); | |
195 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
196 | ||
197 | /* rtnetlink specific */ | |
198 | int (*dump)(struct tcf_proto*, unsigned long, | |
199 | struct sk_buff *skb, struct tcmsg*); | |
200 | ||
201 | struct module *owner; | |
202 | }; | |
203 | ||
fd2c3ef7 | 204 | struct tcf_proto { |
1da177e4 LT |
205 | /* Fast access part */ |
206 | struct tcf_proto *next; | |
207 | void *root; | |
dc7f9f6e ED |
208 | int (*classify)(struct sk_buff *, |
209 | const struct tcf_proto *, | |
210 | struct tcf_result *); | |
66c6f529 | 211 | __be16 protocol; |
1da177e4 LT |
212 | |
213 | /* All the rest */ | |
214 | u32 prio; | |
215 | u32 classid; | |
216 | struct Qdisc *q; | |
217 | void *data; | |
dc7f9f6e | 218 | const struct tcf_proto_ops *ops; |
1da177e4 LT |
219 | }; |
220 | ||
175f9c1b JK |
221 | struct qdisc_skb_cb { |
222 | unsigned int pkt_len; | |
16bda13d | 223 | unsigned char data[24]; |
175f9c1b JK |
224 | }; |
225 | ||
16bda13d DM |
226 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
227 | { | |
228 | struct qdisc_skb_cb *qcb; | |
229 | BUILD_BUG_ON(sizeof(skb->cb) < sizeof(unsigned int) + sz); | |
230 | BUILD_BUG_ON(sizeof(qcb->data) < sz); | |
231 | } | |
232 | ||
05bdd2f1 | 233 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
234 | { |
235 | return q->q.qlen; | |
236 | } | |
237 | ||
bfe0d029 | 238 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
239 | { |
240 | return (struct qdisc_skb_cb *)skb->cb; | |
241 | } | |
242 | ||
83874000 DM |
243 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
244 | { | |
245 | return &qdisc->q.lock; | |
246 | } | |
247 | ||
05bdd2f1 | 248 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc DM |
249 | { |
250 | return qdisc->dev_queue->qdisc; | |
251 | } | |
252 | ||
05bdd2f1 | 253 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
254 | { |
255 | return qdisc->dev_queue->qdisc_sleeping; | |
256 | } | |
257 | ||
7e43f112 DM |
258 | /* The qdisc root lock is a mechanism by which to top level |
259 | * of a qdisc tree can be locked from any qdisc node in the | |
260 | * forest. This allows changing the configuration of some | |
261 | * aspect of the qdisc tree while blocking out asynchronous | |
262 | * qdisc access in the packet processing paths. | |
263 | * | |
264 | * It is only legal to do this when the root will not change | |
265 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
266 | * root. This is enforced by holding the RTNL semaphore, which | |
267 | * all users of this lock accessor must do. | |
268 | */ | |
05bdd2f1 | 269 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
270 | { |
271 | struct Qdisc *root = qdisc_root(qdisc); | |
272 | ||
7e43f112 | 273 | ASSERT_RTNL(); |
83874000 | 274 | return qdisc_lock(root); |
7698b4fc DM |
275 | } |
276 | ||
05bdd2f1 | 277 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
278 | { |
279 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
280 | ||
281 | ASSERT_RTNL(); | |
282 | return qdisc_lock(root); | |
283 | } | |
284 | ||
05bdd2f1 | 285 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
286 | { |
287 | return qdisc->dev_queue->dev; | |
288 | } | |
1da177e4 | 289 | |
05bdd2f1 | 290 | static inline void sch_tree_lock(const struct Qdisc *q) |
78a5b30b | 291 | { |
fe439dd0 | 292 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
293 | } |
294 | ||
05bdd2f1 | 295 | static inline void sch_tree_unlock(const struct Qdisc *q) |
78a5b30b | 296 | { |
fe439dd0 | 297 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
298 | } |
299 | ||
300 | #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) | |
301 | #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) | |
1da177e4 | 302 | |
e41a33e6 TG |
303 | extern struct Qdisc noop_qdisc; |
304 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
305 | extern struct Qdisc_ops pfifo_fast_ops; |
306 | extern struct Qdisc_ops mq_qdisc_ops; | |
e41a33e6 | 307 | |
fd2c3ef7 | 308 | struct Qdisc_class_common { |
6fe1c7a5 PM |
309 | u32 classid; |
310 | struct hlist_node hnode; | |
311 | }; | |
312 | ||
fd2c3ef7 | 313 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
314 | struct hlist_head *hash; |
315 | unsigned int hashsize; | |
316 | unsigned int hashmask; | |
317 | unsigned int hashelems; | |
318 | }; | |
319 | ||
320 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
321 | { | |
322 | id ^= id >> 8; | |
323 | id ^= id >> 4; | |
324 | return id & mask; | |
325 | } | |
326 | ||
327 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 328 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
329 | { |
330 | struct Qdisc_class_common *cl; | |
331 | struct hlist_node *n; | |
332 | unsigned int h; | |
333 | ||
334 | h = qdisc_class_hash(id, hash->hashmask); | |
335 | hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { | |
336 | if (cl->classid == id) | |
337 | return cl; | |
338 | } | |
339 | return NULL; | |
340 | } | |
341 | ||
342 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); | |
343 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
344 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
345 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
346 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
347 | ||
e41a33e6 TG |
348 | extern void dev_init_scheduler(struct net_device *dev); |
349 | extern void dev_shutdown(struct net_device *dev); | |
350 | extern void dev_activate(struct net_device *dev); | |
351 | extern void dev_deactivate(struct net_device *dev); | |
44345724 | 352 | extern void dev_deactivate_many(struct list_head *head); |
589983cd PM |
353 | extern struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, |
354 | struct Qdisc *qdisc); | |
e41a33e6 TG |
355 | extern void qdisc_reset(struct Qdisc *qdisc); |
356 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
43effa1e | 357 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
5ce2d488 | 358 | extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
bb949fbd | 359 | struct Qdisc_ops *ops); |
3511c913 | 360 | extern struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
9f9afec4 | 361 | struct Qdisc_ops *ops, u32 parentid); |
a2da570d ED |
362 | extern void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
363 | const struct qdisc_size_table *stab); | |
a48b5a61 | 364 | extern void tcf_destroy(struct tcf_proto *tp); |
ff31ab56 | 365 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
1da177e4 | 366 | |
f0796d5c JF |
367 | /* Reset all TX qdiscs greater then index of a device. */ |
368 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) | |
5aa70995 | 369 | { |
4ef6acff JF |
370 | struct Qdisc *qdisc; |
371 | ||
f0796d5c | 372 | for (; i < dev->num_tx_queues; i++) { |
4ef6acff JF |
373 | qdisc = netdev_get_tx_queue(dev, i)->qdisc; |
374 | if (qdisc) { | |
375 | spin_lock_bh(qdisc_lock(qdisc)); | |
376 | qdisc_reset(qdisc); | |
377 | spin_unlock_bh(qdisc_lock(qdisc)); | |
378 | } | |
379 | } | |
5aa70995 DM |
380 | } |
381 | ||
5aa70995 DM |
382 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
383 | { | |
f0796d5c | 384 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
385 | } |
386 | ||
3e745dd6 DM |
387 | /* Are all TX queues of the device empty? */ |
388 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
389 | { | |
e8a0464c DM |
390 | unsigned int i; |
391 | for (i = 0; i < dev->num_tx_queues; i++) { | |
392 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
393 | const struct Qdisc *q = txq->qdisc; | |
3e745dd6 | 394 | |
e8a0464c DM |
395 | if (q->q.qlen) |
396 | return false; | |
397 | } | |
398 | return true; | |
3e745dd6 DM |
399 | } |
400 | ||
6fa9864b | 401 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 402 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 403 | { |
e8a0464c DM |
404 | unsigned int i; |
405 | for (i = 0; i < dev->num_tx_queues; i++) { | |
406 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
407 | if (txq->qdisc != txq->qdisc_sleeping) | |
408 | return true; | |
409 | } | |
410 | return false; | |
6fa9864b DM |
411 | } |
412 | ||
e8a0464c | 413 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
414 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
415 | { | |
e8a0464c DM |
416 | unsigned int i; |
417 | for (i = 0; i < dev->num_tx_queues; i++) { | |
418 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
419 | if (txq->qdisc != &noop_qdisc) | |
420 | return false; | |
421 | } | |
422 | return true; | |
05297949 DM |
423 | } |
424 | ||
bfe0d029 | 425 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 426 | { |
175f9c1b | 427 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
428 | } |
429 | ||
c27f339a | 430 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
431 | enum net_xmit_qdisc_t { |
432 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 433 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
434 | }; |
435 | ||
c27f339a | 436 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 437 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
438 | #else |
439 | #define net_xmit_drop_count(e) (1) | |
440 | #endif | |
441 | ||
a2da570d ED |
442 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
443 | const struct Qdisc *sch) | |
5f86173b | 444 | { |
3a682fbd | 445 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
446 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
447 | ||
448 | if (stab) | |
449 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 450 | #endif |
a2da570d ED |
451 | } |
452 | ||
453 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) | |
454 | { | |
455 | qdisc_calculate_pkt_len(skb, sch); | |
5f86173b JK |
456 | return sch->enqueue(skb, sch); |
457 | } | |
458 | ||
459 | static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) | |
460 | { | |
175f9c1b | 461 | qdisc_skb_cb(skb)->pkt_len = skb->len; |
378a2f09 | 462 | return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; |
5f86173b JK |
463 | } |
464 | ||
bfe0d029 ED |
465 | |
466 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, | |
467 | const struct sk_buff *skb) | |
468 | { | |
469 | bstats->bytes += qdisc_pkt_len(skb); | |
470 | bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; | |
471 | } | |
472 | ||
473 | static inline void qdisc_bstats_update(struct Qdisc *sch, | |
474 | const struct sk_buff *skb) | |
bbd8a0d3 | 475 | { |
bfe0d029 | 476 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
477 | } |
478 | ||
9972b25d TG |
479 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
480 | struct sk_buff_head *list) | |
481 | { | |
482 | __skb_queue_tail(list, skb); | |
0abf77e5 | 483 | sch->qstats.backlog += qdisc_pkt_len(skb); |
9972b25d TG |
484 | |
485 | return NET_XMIT_SUCCESS; | |
486 | } | |
487 | ||
488 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
489 | { | |
490 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
491 | } | |
492 | ||
493 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
494 | struct sk_buff_head *list) | |
495 | { | |
496 | struct sk_buff *skb = __skb_dequeue(list); | |
497 | ||
9190b3b3 | 498 | if (likely(skb != NULL)) { |
0abf77e5 | 499 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9190b3b3 ED |
500 | qdisc_bstats_update(sch, skb); |
501 | } | |
9972b25d TG |
502 | |
503 | return skb; | |
504 | } | |
505 | ||
506 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
507 | { | |
508 | return __qdisc_dequeue_head(sch, &sch->q); | |
57dbb2d8 HPP |
509 | } |
510 | ||
511 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, | |
512 | struct sk_buff_head *list) | |
513 | { | |
9190b3b3 | 514 | struct sk_buff *skb = __skb_dequeue(list); |
57dbb2d8 HPP |
515 | |
516 | if (likely(skb != NULL)) { | |
517 | unsigned int len = qdisc_pkt_len(skb); | |
9190b3b3 | 518 | sch->qstats.backlog -= len; |
57dbb2d8 HPP |
519 | kfree_skb(skb); |
520 | return len; | |
521 | } | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch) | |
527 | { | |
528 | return __qdisc_queue_drop_head(sch, &sch->q); | |
9972b25d TG |
529 | } |
530 | ||
531 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
532 | struct sk_buff_head *list) | |
533 | { | |
534 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
535 | ||
536 | if (likely(skb != NULL)) | |
0abf77e5 | 537 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9972b25d TG |
538 | |
539 | return skb; | |
540 | } | |
541 | ||
542 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
543 | { | |
544 | return __qdisc_dequeue_tail(sch, &sch->q); | |
545 | } | |
546 | ||
48a8f519 PM |
547 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
548 | { | |
549 | return skb_peek(&sch->q); | |
550 | } | |
551 | ||
77be155c JP |
552 | /* generic pseudo peek method for non-work-conserving qdisc */ |
553 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
554 | { | |
555 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ | |
61c9eaf9 | 556 | if (!sch->gso_skb) { |
77be155c | 557 | sch->gso_skb = sch->dequeue(sch); |
61c9eaf9 JP |
558 | if (sch->gso_skb) |
559 | /* it's still part of the queue */ | |
560 | sch->q.qlen++; | |
561 | } | |
77be155c JP |
562 | |
563 | return sch->gso_skb; | |
564 | } | |
565 | ||
566 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
567 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
568 | { | |
569 | struct sk_buff *skb = sch->gso_skb; | |
570 | ||
61c9eaf9 | 571 | if (skb) { |
77be155c | 572 | sch->gso_skb = NULL; |
61c9eaf9 JP |
573 | sch->q.qlen--; |
574 | } else { | |
77be155c | 575 | skb = sch->dequeue(sch); |
61c9eaf9 | 576 | } |
77be155c JP |
577 | |
578 | return skb; | |
579 | } | |
580 | ||
9972b25d TG |
581 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
582 | struct sk_buff_head *list) | |
583 | { | |
584 | /* | |
585 | * We do not know the backlog in bytes of this list, it | |
586 | * is up to the caller to correct it | |
587 | */ | |
93245dd6 | 588 | __skb_queue_purge(list); |
9972b25d TG |
589 | } |
590 | ||
591 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
592 | { | |
593 | __qdisc_reset_queue(sch, &sch->q); | |
594 | sch->qstats.backlog = 0; | |
595 | } | |
596 | ||
597 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
598 | struct sk_buff_head *list) | |
599 | { | |
600 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
601 | ||
602 | if (likely(skb != NULL)) { | |
0abf77e5 | 603 | unsigned int len = qdisc_pkt_len(skb); |
9972b25d TG |
604 | kfree_skb(skb); |
605 | return len; | |
606 | } | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
612 | { | |
613 | return __qdisc_queue_drop(sch, &sch->q); | |
614 | } | |
615 | ||
616 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
617 | { | |
618 | kfree_skb(skb); | |
619 | sch->qstats.drops++; | |
620 | ||
621 | return NET_XMIT_DROP; | |
622 | } | |
623 | ||
624 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
625 | { | |
626 | sch->qstats.drops++; | |
627 | ||
c3bc7cff | 628 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
629 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
630 | goto drop; | |
631 | ||
632 | return NET_XMIT_SUCCESS; | |
633 | ||
634 | drop: | |
635 | #endif | |
636 | kfree_skb(skb); | |
637 | return NET_XMIT_DROP; | |
638 | } | |
639 | ||
e9bef55d JDB |
640 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
641 | long it will take to send a packet given its size. | |
642 | */ | |
643 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
644 | { | |
e08b0998 JDB |
645 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
646 | if (slot < 0) | |
647 | slot = 0; | |
e9bef55d JDB |
648 | slot >>= rtab->rate.cell_log; |
649 | if (slot > 255) | |
a02cec21 | 650 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
651 | return rtab->data[slot]; |
652 | } | |
653 | ||
12da81d1 | 654 | #ifdef CONFIG_NET_CLS_ACT |
210d6de7 CG |
655 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask, |
656 | int action) | |
12da81d1 | 657 | { |
210d6de7 CG |
658 | struct sk_buff *n; |
659 | ||
17302107 | 660 | n = skb_clone(skb, gfp_mask); |
12da81d1 JHS |
661 | |
662 | if (n) { | |
663 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
664 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
665 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
666 | } |
667 | return n; | |
668 | } | |
669 | #endif | |
670 | ||
1da177e4 | 671 | #endif |