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 | |
1abbe139 ED |
53 | #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for |
54 | * q->dev_queue : It can test | |
55 | * netif_xmit_frozen_or_stopped() before | |
56 | * dequeueing next packet. | |
57 | * Its true for MQ/MQPRIO slaves, or non | |
58 | * multiqueue device. | |
59 | */ | |
b00355db | 60 | #define TCQ_F_WARN_NONWC (1 << 16) |
1da177e4 | 61 | int padded; |
05bdd2f1 | 62 | const struct Qdisc_ops *ops; |
a2da570d | 63 | struct qdisc_size_table __rcu *stab; |
5e140dfc | 64 | struct list_head list; |
1da177e4 LT |
65 | u32 handle; |
66 | u32 parent; | |
67 | atomic_t refcnt; | |
1da177e4 | 68 | struct gnet_stats_rate_est rate_est; |
1da177e4 LT |
69 | int (*reshape_fail)(struct sk_buff *skb, |
70 | struct Qdisc *q); | |
71 | ||
72b25a91 DM |
72 | void *u32_node; |
73 | ||
1da177e4 LT |
74 | /* This field is deprecated, but it is still used by CBQ |
75 | * and it will live until better solution will be invented. | |
76 | */ | |
77 | struct Qdisc *__parent; | |
5e140dfc ED |
78 | struct netdev_queue *dev_queue; |
79 | struct Qdisc *next_sched; | |
80 | ||
81 | struct sk_buff *gso_skb; | |
82 | /* | |
83 | * For performance sake on SMP, we put highly modified fields at the end | |
84 | */ | |
85 | unsigned long state; | |
86 | struct sk_buff_head q; | |
c1a8f1f1 | 87 | struct gnet_stats_basic_packed bstats; |
fd245a4a | 88 | unsigned int __state; |
5e140dfc | 89 | struct gnet_stats_queue qstats; |
79640a4c ED |
90 | struct rcu_head rcu_head; |
91 | spinlock_t busylock; | |
d276055c | 92 | u32 limit; |
1da177e4 LT |
93 | }; |
94 | ||
fd245a4a | 95 | static inline bool qdisc_is_running(const struct Qdisc *qdisc) |
bc135b23 | 96 | { |
fd245a4a | 97 | return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false; |
bc135b23 ED |
98 | } |
99 | ||
100 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) | |
101 | { | |
fd245a4a ED |
102 | if (qdisc_is_running(qdisc)) |
103 | return false; | |
104 | qdisc->__state |= __QDISC___STATE_RUNNING; | |
105 | return true; | |
bc135b23 ED |
106 | } |
107 | ||
108 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
109 | { | |
fd245a4a ED |
110 | qdisc->__state &= ~__QDISC___STATE_RUNNING; |
111 | } | |
112 | ||
113 | static inline bool qdisc_is_throttled(const struct Qdisc *qdisc) | |
114 | { | |
ef352e7c | 115 | return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false; |
fd245a4a ED |
116 | } |
117 | ||
118 | static inline void qdisc_throttled(struct Qdisc *qdisc) | |
119 | { | |
ef352e7c | 120 | set_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
fd245a4a ED |
121 | } |
122 | ||
123 | static inline void qdisc_unthrottled(struct Qdisc *qdisc) | |
124 | { | |
ef352e7c | 125 | clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
bc135b23 ED |
126 | } |
127 | ||
fd2c3ef7 | 128 | struct Qdisc_class_ops { |
1da177e4 | 129 | /* Child qdisc manipulation */ |
926e61b7 | 130 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 LT |
131 | int (*graft)(struct Qdisc *, unsigned long cl, |
132 | struct Qdisc *, struct Qdisc **); | |
133 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 134 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
135 | |
136 | /* Class manipulation routines */ | |
137 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
138 | void (*put)(struct Qdisc *, unsigned long); | |
139 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 140 | struct nlattr **, unsigned long *); |
1da177e4 LT |
141 | int (*delete)(struct Qdisc *, unsigned long); |
142 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
143 | ||
144 | /* Filter manipulation */ | |
145 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); | |
146 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, | |
147 | u32 classid); | |
148 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
149 | ||
150 | /* rtnetlink specific */ | |
151 | int (*dump)(struct Qdisc *, unsigned long, | |
152 | struct sk_buff *skb, struct tcmsg*); | |
153 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
154 | struct gnet_dump *); | |
155 | }; | |
156 | ||
fd2c3ef7 | 157 | struct Qdisc_ops { |
1da177e4 | 158 | struct Qdisc_ops *next; |
20fea08b | 159 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
160 | char id[IFNAMSIZ]; |
161 | int priv_size; | |
162 | ||
163 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
164 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
90d841fd | 165 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 LT |
166 | unsigned int (*drop)(struct Qdisc *); |
167 | ||
1e90474c | 168 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
169 | void (*reset)(struct Qdisc *); |
170 | void (*destroy)(struct Qdisc *); | |
1e90474c | 171 | int (*change)(struct Qdisc *, struct nlattr *arg); |
6ec1c69a | 172 | void (*attach)(struct Qdisc *); |
1da177e4 LT |
173 | |
174 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
175 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
176 | ||
177 | struct module *owner; | |
178 | }; | |
179 | ||
180 | ||
fd2c3ef7 | 181 | struct tcf_result { |
1da177e4 LT |
182 | unsigned long class; |
183 | u32 classid; | |
184 | }; | |
185 | ||
fd2c3ef7 | 186 | struct tcf_proto_ops { |
1da177e4 LT |
187 | struct tcf_proto_ops *next; |
188 | char kind[IFNAMSIZ]; | |
189 | ||
dc7f9f6e ED |
190 | int (*classify)(struct sk_buff *, |
191 | const struct tcf_proto *, | |
192 | struct tcf_result *); | |
1da177e4 LT |
193 | int (*init)(struct tcf_proto*); |
194 | void (*destroy)(struct tcf_proto*); | |
195 | ||
196 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
197 | void (*put)(struct tcf_proto*, unsigned long); | |
c1b52739 | 198 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 199 | struct tcf_proto*, unsigned long, |
add93b61 | 200 | u32 handle, struct nlattr **, |
1da177e4 LT |
201 | unsigned long *); |
202 | int (*delete)(struct tcf_proto*, unsigned long); | |
203 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
204 | ||
205 | /* rtnetlink specific */ | |
206 | int (*dump)(struct tcf_proto*, unsigned long, | |
207 | struct sk_buff *skb, struct tcmsg*); | |
208 | ||
209 | struct module *owner; | |
210 | }; | |
211 | ||
fd2c3ef7 | 212 | struct tcf_proto { |
1da177e4 LT |
213 | /* Fast access part */ |
214 | struct tcf_proto *next; | |
215 | void *root; | |
dc7f9f6e ED |
216 | int (*classify)(struct sk_buff *, |
217 | const struct tcf_proto *, | |
218 | struct tcf_result *); | |
66c6f529 | 219 | __be16 protocol; |
1da177e4 LT |
220 | |
221 | /* All the rest */ | |
222 | u32 prio; | |
223 | u32 classid; | |
224 | struct Qdisc *q; | |
225 | void *data; | |
dc7f9f6e | 226 | const struct tcf_proto_ops *ops; |
1da177e4 LT |
227 | }; |
228 | ||
175f9c1b JK |
229 | struct qdisc_skb_cb { |
230 | unsigned int pkt_len; | |
df4ab5b3 | 231 | u16 slave_dev_queue_mapping; |
5ee31c68 ED |
232 | u16 _pad; |
233 | unsigned char data[20]; | |
175f9c1b JK |
234 | }; |
235 | ||
16bda13d DM |
236 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
237 | { | |
238 | struct qdisc_skb_cb *qcb; | |
5ee31c68 ED |
239 | |
240 | BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); | |
16bda13d DM |
241 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
242 | } | |
243 | ||
05bdd2f1 | 244 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
245 | { |
246 | return q->q.qlen; | |
247 | } | |
248 | ||
bfe0d029 | 249 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
250 | { |
251 | return (struct qdisc_skb_cb *)skb->cb; | |
252 | } | |
253 | ||
83874000 DM |
254 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
255 | { | |
256 | return &qdisc->q.lock; | |
257 | } | |
258 | ||
05bdd2f1 | 259 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc DM |
260 | { |
261 | return qdisc->dev_queue->qdisc; | |
262 | } | |
263 | ||
05bdd2f1 | 264 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
265 | { |
266 | return qdisc->dev_queue->qdisc_sleeping; | |
267 | } | |
268 | ||
7e43f112 DM |
269 | /* The qdisc root lock is a mechanism by which to top level |
270 | * of a qdisc tree can be locked from any qdisc node in the | |
271 | * forest. This allows changing the configuration of some | |
272 | * aspect of the qdisc tree while blocking out asynchronous | |
273 | * qdisc access in the packet processing paths. | |
274 | * | |
275 | * It is only legal to do this when the root will not change | |
276 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
277 | * root. This is enforced by holding the RTNL semaphore, which | |
278 | * all users of this lock accessor must do. | |
279 | */ | |
05bdd2f1 | 280 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
281 | { |
282 | struct Qdisc *root = qdisc_root(qdisc); | |
283 | ||
7e43f112 | 284 | ASSERT_RTNL(); |
83874000 | 285 | return qdisc_lock(root); |
7698b4fc DM |
286 | } |
287 | ||
05bdd2f1 | 288 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
289 | { |
290 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
291 | ||
292 | ASSERT_RTNL(); | |
293 | return qdisc_lock(root); | |
294 | } | |
295 | ||
05bdd2f1 | 296 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
297 | { |
298 | return qdisc->dev_queue->dev; | |
299 | } | |
1da177e4 | 300 | |
05bdd2f1 | 301 | static inline void sch_tree_lock(const struct Qdisc *q) |
78a5b30b | 302 | { |
fe439dd0 | 303 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
304 | } |
305 | ||
05bdd2f1 | 306 | static inline void sch_tree_unlock(const struct Qdisc *q) |
78a5b30b | 307 | { |
fe439dd0 | 308 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
309 | } |
310 | ||
311 | #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) | |
312 | #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) | |
1da177e4 | 313 | |
e41a33e6 TG |
314 | extern struct Qdisc noop_qdisc; |
315 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
316 | extern struct Qdisc_ops pfifo_fast_ops; |
317 | extern struct Qdisc_ops mq_qdisc_ops; | |
e41a33e6 | 318 | |
fd2c3ef7 | 319 | struct Qdisc_class_common { |
6fe1c7a5 PM |
320 | u32 classid; |
321 | struct hlist_node hnode; | |
322 | }; | |
323 | ||
fd2c3ef7 | 324 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
325 | struct hlist_head *hash; |
326 | unsigned int hashsize; | |
327 | unsigned int hashmask; | |
328 | unsigned int hashelems; | |
329 | }; | |
330 | ||
331 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
332 | { | |
333 | id ^= id >> 8; | |
334 | id ^= id >> 4; | |
335 | return id & mask; | |
336 | } | |
337 | ||
338 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 339 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
340 | { |
341 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
342 | unsigned int h; |
343 | ||
344 | h = qdisc_class_hash(id, hash->hashmask); | |
b67bfe0d | 345 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
346 | if (cl->classid == id) |
347 | return cl; | |
348 | } | |
349 | return NULL; | |
350 | } | |
351 | ||
352 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); | |
353 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
354 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
355 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
356 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
357 | ||
e41a33e6 TG |
358 | extern void dev_init_scheduler(struct net_device *dev); |
359 | extern void dev_shutdown(struct net_device *dev); | |
360 | extern void dev_activate(struct net_device *dev); | |
361 | extern void dev_deactivate(struct net_device *dev); | |
44345724 | 362 | extern void dev_deactivate_many(struct list_head *head); |
589983cd PM |
363 | extern struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, |
364 | struct Qdisc *qdisc); | |
e41a33e6 TG |
365 | extern void qdisc_reset(struct Qdisc *qdisc); |
366 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
43effa1e | 367 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
5ce2d488 | 368 | extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
bb949fbd | 369 | struct Qdisc_ops *ops); |
3511c913 | 370 | extern struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
9f9afec4 | 371 | struct Qdisc_ops *ops, u32 parentid); |
a2da570d ED |
372 | extern void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
373 | const struct qdisc_size_table *stab); | |
a48b5a61 | 374 | extern void tcf_destroy(struct tcf_proto *tp); |
ff31ab56 | 375 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
1da177e4 | 376 | |
f0796d5c JF |
377 | /* Reset all TX qdiscs greater then index of a device. */ |
378 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) | |
5aa70995 | 379 | { |
4ef6acff JF |
380 | struct Qdisc *qdisc; |
381 | ||
f0796d5c | 382 | for (; i < dev->num_tx_queues; i++) { |
4ef6acff JF |
383 | qdisc = netdev_get_tx_queue(dev, i)->qdisc; |
384 | if (qdisc) { | |
385 | spin_lock_bh(qdisc_lock(qdisc)); | |
386 | qdisc_reset(qdisc); | |
387 | spin_unlock_bh(qdisc_lock(qdisc)); | |
388 | } | |
389 | } | |
5aa70995 DM |
390 | } |
391 | ||
5aa70995 DM |
392 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
393 | { | |
f0796d5c | 394 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
395 | } |
396 | ||
3e745dd6 DM |
397 | /* Are all TX queues of the device empty? */ |
398 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
399 | { | |
e8a0464c DM |
400 | unsigned int i; |
401 | for (i = 0; i < dev->num_tx_queues; i++) { | |
402 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
403 | const struct Qdisc *q = txq->qdisc; | |
3e745dd6 | 404 | |
e8a0464c DM |
405 | if (q->q.qlen) |
406 | return false; | |
407 | } | |
408 | return true; | |
3e745dd6 DM |
409 | } |
410 | ||
6fa9864b | 411 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 412 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 413 | { |
e8a0464c DM |
414 | unsigned int i; |
415 | for (i = 0; i < dev->num_tx_queues; i++) { | |
416 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
417 | if (txq->qdisc != txq->qdisc_sleeping) | |
418 | return true; | |
419 | } | |
420 | return false; | |
6fa9864b DM |
421 | } |
422 | ||
e8a0464c | 423 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
424 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
425 | { | |
e8a0464c DM |
426 | unsigned int i; |
427 | for (i = 0; i < dev->num_tx_queues; i++) { | |
428 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
429 | if (txq->qdisc != &noop_qdisc) | |
430 | return false; | |
431 | } | |
432 | return true; | |
05297949 DM |
433 | } |
434 | ||
bfe0d029 | 435 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 436 | { |
175f9c1b | 437 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
438 | } |
439 | ||
c27f339a | 440 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
441 | enum net_xmit_qdisc_t { |
442 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 443 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
444 | }; |
445 | ||
c27f339a | 446 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 447 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
448 | #else |
449 | #define net_xmit_drop_count(e) (1) | |
450 | #endif | |
451 | ||
a2da570d ED |
452 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
453 | const struct Qdisc *sch) | |
5f86173b | 454 | { |
3a682fbd | 455 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
456 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
457 | ||
458 | if (stab) | |
459 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 460 | #endif |
a2da570d ED |
461 | } |
462 | ||
463 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) | |
464 | { | |
465 | qdisc_calculate_pkt_len(skb, sch); | |
5f86173b JK |
466 | return sch->enqueue(skb, sch); |
467 | } | |
468 | ||
469 | static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) | |
470 | { | |
175f9c1b | 471 | qdisc_skb_cb(skb)->pkt_len = skb->len; |
378a2f09 | 472 | return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; |
5f86173b JK |
473 | } |
474 | ||
bfe0d029 ED |
475 | |
476 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, | |
477 | const struct sk_buff *skb) | |
478 | { | |
479 | bstats->bytes += qdisc_pkt_len(skb); | |
480 | bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; | |
481 | } | |
482 | ||
483 | static inline void qdisc_bstats_update(struct Qdisc *sch, | |
484 | const struct sk_buff *skb) | |
bbd8a0d3 | 485 | { |
bfe0d029 | 486 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
487 | } |
488 | ||
9972b25d TG |
489 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
490 | struct sk_buff_head *list) | |
491 | { | |
492 | __skb_queue_tail(list, skb); | |
0abf77e5 | 493 | sch->qstats.backlog += qdisc_pkt_len(skb); |
9972b25d TG |
494 | |
495 | return NET_XMIT_SUCCESS; | |
496 | } | |
497 | ||
498 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
499 | { | |
500 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
501 | } | |
502 | ||
503 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
504 | struct sk_buff_head *list) | |
505 | { | |
506 | struct sk_buff *skb = __skb_dequeue(list); | |
507 | ||
9190b3b3 | 508 | if (likely(skb != NULL)) { |
0abf77e5 | 509 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9190b3b3 ED |
510 | qdisc_bstats_update(sch, skb); |
511 | } | |
9972b25d TG |
512 | |
513 | return skb; | |
514 | } | |
515 | ||
516 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
517 | { | |
518 | return __qdisc_dequeue_head(sch, &sch->q); | |
57dbb2d8 HPP |
519 | } |
520 | ||
521 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, | |
522 | struct sk_buff_head *list) | |
523 | { | |
9190b3b3 | 524 | struct sk_buff *skb = __skb_dequeue(list); |
57dbb2d8 HPP |
525 | |
526 | if (likely(skb != NULL)) { | |
527 | unsigned int len = qdisc_pkt_len(skb); | |
9190b3b3 | 528 | sch->qstats.backlog -= len; |
57dbb2d8 HPP |
529 | kfree_skb(skb); |
530 | return len; | |
531 | } | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch) | |
537 | { | |
538 | return __qdisc_queue_drop_head(sch, &sch->q); | |
9972b25d TG |
539 | } |
540 | ||
541 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
542 | struct sk_buff_head *list) | |
543 | { | |
544 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
545 | ||
546 | if (likely(skb != NULL)) | |
0abf77e5 | 547 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9972b25d TG |
548 | |
549 | return skb; | |
550 | } | |
551 | ||
552 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
553 | { | |
554 | return __qdisc_dequeue_tail(sch, &sch->q); | |
555 | } | |
556 | ||
48a8f519 PM |
557 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
558 | { | |
559 | return skb_peek(&sch->q); | |
560 | } | |
561 | ||
77be155c JP |
562 | /* generic pseudo peek method for non-work-conserving qdisc */ |
563 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
564 | { | |
565 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ | |
61c9eaf9 | 566 | if (!sch->gso_skb) { |
77be155c | 567 | sch->gso_skb = sch->dequeue(sch); |
61c9eaf9 JP |
568 | if (sch->gso_skb) |
569 | /* it's still part of the queue */ | |
570 | sch->q.qlen++; | |
571 | } | |
77be155c JP |
572 | |
573 | return sch->gso_skb; | |
574 | } | |
575 | ||
576 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
577 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
578 | { | |
579 | struct sk_buff *skb = sch->gso_skb; | |
580 | ||
61c9eaf9 | 581 | if (skb) { |
77be155c | 582 | sch->gso_skb = NULL; |
61c9eaf9 JP |
583 | sch->q.qlen--; |
584 | } else { | |
77be155c | 585 | skb = sch->dequeue(sch); |
61c9eaf9 | 586 | } |
77be155c JP |
587 | |
588 | return skb; | |
589 | } | |
590 | ||
9972b25d TG |
591 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
592 | struct sk_buff_head *list) | |
593 | { | |
594 | /* | |
595 | * We do not know the backlog in bytes of this list, it | |
596 | * is up to the caller to correct it | |
597 | */ | |
93245dd6 | 598 | __skb_queue_purge(list); |
9972b25d TG |
599 | } |
600 | ||
601 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
602 | { | |
603 | __qdisc_reset_queue(sch, &sch->q); | |
604 | sch->qstats.backlog = 0; | |
605 | } | |
606 | ||
607 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
608 | struct sk_buff_head *list) | |
609 | { | |
610 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
611 | ||
612 | if (likely(skb != NULL)) { | |
0abf77e5 | 613 | unsigned int len = qdisc_pkt_len(skb); |
9972b25d TG |
614 | kfree_skb(skb); |
615 | return len; | |
616 | } | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
622 | { | |
623 | return __qdisc_queue_drop(sch, &sch->q); | |
624 | } | |
625 | ||
626 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
627 | { | |
628 | kfree_skb(skb); | |
629 | sch->qstats.drops++; | |
630 | ||
631 | return NET_XMIT_DROP; | |
632 | } | |
633 | ||
634 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
635 | { | |
636 | sch->qstats.drops++; | |
637 | ||
c3bc7cff | 638 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
639 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
640 | goto drop; | |
641 | ||
642 | return NET_XMIT_SUCCESS; | |
643 | ||
644 | drop: | |
645 | #endif | |
646 | kfree_skb(skb); | |
647 | return NET_XMIT_DROP; | |
648 | } | |
649 | ||
e9bef55d JDB |
650 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
651 | long it will take to send a packet given its size. | |
652 | */ | |
653 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
654 | { | |
e08b0998 JDB |
655 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
656 | if (slot < 0) | |
657 | slot = 0; | |
e9bef55d JDB |
658 | slot >>= rtab->rate.cell_log; |
659 | if (slot > 255) | |
a02cec21 | 660 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
661 | return rtab->data[slot]; |
662 | } | |
663 | ||
12da81d1 | 664 | #ifdef CONFIG_NET_CLS_ACT |
210d6de7 CG |
665 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask, |
666 | int action) | |
12da81d1 | 667 | { |
210d6de7 CG |
668 | struct sk_buff *n; |
669 | ||
17302107 | 670 | n = skb_clone(skb, gfp_mask); |
12da81d1 JHS |
671 | |
672 | if (n) { | |
673 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
674 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
675 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
676 | } |
677 | return n; | |
678 | } | |
679 | #endif | |
680 | ||
292f1c7f | 681 | struct psched_ratecfg { |
01cb71d2 ED |
682 | u64 rate_bps; |
683 | u32 mult; | |
684 | u16 overhead; | |
c06ab091 | 685 | u8 linklayer; |
01cb71d2 | 686 | u8 shift; |
292f1c7f JP |
687 | }; |
688 | ||
689 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
690 | unsigned int len) | |
691 | { | |
c06ab091 JDB |
692 | len += r->overhead; |
693 | ||
694 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) | |
695 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
696 | ||
697 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
698 | } |
699 | ||
01cb71d2 | 700 | extern void psched_ratecfg_precompute(struct psched_ratecfg *r, const struct tc_ratespec *conf); |
292f1c7f | 701 | |
01cb71d2 ED |
702 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
703 | const struct psched_ratecfg *r) | |
292f1c7f | 704 | { |
01cb71d2 ED |
705 | memset(res, 0, sizeof(*res)); |
706 | res->rate = r->rate_bps >> 3; | |
707 | res->overhead = r->overhead; | |
c06ab091 | 708 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
709 | } |
710 | ||
1da177e4 | 711 | #endif |