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; | |
342 | struct hlist_node *n; | |
343 | unsigned int h; | |
344 | ||
345 | h = qdisc_class_hash(id, hash->hashmask); | |
346 | hlist_for_each_entry(cl, n, &hash->hash[h], hnode) { | |
347 | if (cl->classid == id) | |
348 | return cl; | |
349 | } | |
350 | return NULL; | |
351 | } | |
352 | ||
353 | extern int qdisc_class_hash_init(struct Qdisc_class_hash *); | |
354 | extern void qdisc_class_hash_insert(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
355 | extern void qdisc_class_hash_remove(struct Qdisc_class_hash *, struct Qdisc_class_common *); | |
356 | extern void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
357 | extern void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
358 | ||
e41a33e6 TG |
359 | extern void dev_init_scheduler(struct net_device *dev); |
360 | extern void dev_shutdown(struct net_device *dev); | |
361 | extern void dev_activate(struct net_device *dev); | |
362 | extern void dev_deactivate(struct net_device *dev); | |
44345724 | 363 | extern void dev_deactivate_many(struct list_head *head); |
589983cd PM |
364 | extern struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, |
365 | struct Qdisc *qdisc); | |
e41a33e6 TG |
366 | extern void qdisc_reset(struct Qdisc *qdisc); |
367 | extern void qdisc_destroy(struct Qdisc *qdisc); | |
43effa1e | 368 | extern void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); |
5ce2d488 | 369 | extern struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
bb949fbd | 370 | struct Qdisc_ops *ops); |
3511c913 | 371 | extern struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
9f9afec4 | 372 | struct Qdisc_ops *ops, u32 parentid); |
a2da570d ED |
373 | extern void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
374 | const struct qdisc_size_table *stab); | |
a48b5a61 | 375 | extern void tcf_destroy(struct tcf_proto *tp); |
ff31ab56 | 376 | extern void tcf_destroy_chain(struct tcf_proto **fl); |
1da177e4 | 377 | |
f0796d5c JF |
378 | /* Reset all TX qdiscs greater then index of a device. */ |
379 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) | |
5aa70995 | 380 | { |
4ef6acff JF |
381 | struct Qdisc *qdisc; |
382 | ||
f0796d5c | 383 | for (; i < dev->num_tx_queues; i++) { |
4ef6acff JF |
384 | qdisc = netdev_get_tx_queue(dev, i)->qdisc; |
385 | if (qdisc) { | |
386 | spin_lock_bh(qdisc_lock(qdisc)); | |
387 | qdisc_reset(qdisc); | |
388 | spin_unlock_bh(qdisc_lock(qdisc)); | |
389 | } | |
390 | } | |
5aa70995 DM |
391 | } |
392 | ||
5aa70995 DM |
393 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
394 | { | |
f0796d5c | 395 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
396 | } |
397 | ||
3e745dd6 DM |
398 | /* Are all TX queues of the device empty? */ |
399 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
400 | { | |
e8a0464c DM |
401 | unsigned int i; |
402 | for (i = 0; i < dev->num_tx_queues; i++) { | |
403 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
404 | const struct Qdisc *q = txq->qdisc; | |
3e745dd6 | 405 | |
e8a0464c DM |
406 | if (q->q.qlen) |
407 | return false; | |
408 | } | |
409 | return true; | |
3e745dd6 DM |
410 | } |
411 | ||
6fa9864b | 412 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 413 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 414 | { |
e8a0464c DM |
415 | unsigned int i; |
416 | for (i = 0; i < dev->num_tx_queues; i++) { | |
417 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
418 | if (txq->qdisc != txq->qdisc_sleeping) | |
419 | return true; | |
420 | } | |
421 | return false; | |
6fa9864b DM |
422 | } |
423 | ||
e8a0464c | 424 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
425 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
426 | { | |
e8a0464c DM |
427 | unsigned int i; |
428 | for (i = 0; i < dev->num_tx_queues; i++) { | |
429 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
430 | if (txq->qdisc != &noop_qdisc) | |
431 | return false; | |
432 | } | |
433 | return true; | |
05297949 DM |
434 | } |
435 | ||
bfe0d029 | 436 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 437 | { |
175f9c1b | 438 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
439 | } |
440 | ||
c27f339a | 441 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
442 | enum net_xmit_qdisc_t { |
443 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 444 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
445 | }; |
446 | ||
c27f339a | 447 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 448 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
449 | #else |
450 | #define net_xmit_drop_count(e) (1) | |
451 | #endif | |
452 | ||
a2da570d ED |
453 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
454 | const struct Qdisc *sch) | |
5f86173b | 455 | { |
3a682fbd | 456 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
457 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
458 | ||
459 | if (stab) | |
460 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 461 | #endif |
a2da570d ED |
462 | } |
463 | ||
464 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) | |
465 | { | |
466 | qdisc_calculate_pkt_len(skb, sch); | |
5f86173b JK |
467 | return sch->enqueue(skb, sch); |
468 | } | |
469 | ||
470 | static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) | |
471 | { | |
175f9c1b | 472 | qdisc_skb_cb(skb)->pkt_len = skb->len; |
378a2f09 | 473 | return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; |
5f86173b JK |
474 | } |
475 | ||
bfe0d029 ED |
476 | |
477 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, | |
478 | const struct sk_buff *skb) | |
479 | { | |
480 | bstats->bytes += qdisc_pkt_len(skb); | |
481 | bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; | |
482 | } | |
483 | ||
484 | static inline void qdisc_bstats_update(struct Qdisc *sch, | |
485 | const struct sk_buff *skb) | |
bbd8a0d3 | 486 | { |
bfe0d029 | 487 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
488 | } |
489 | ||
9972b25d TG |
490 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
491 | struct sk_buff_head *list) | |
492 | { | |
493 | __skb_queue_tail(list, skb); | |
0abf77e5 | 494 | sch->qstats.backlog += qdisc_pkt_len(skb); |
9972b25d TG |
495 | |
496 | return NET_XMIT_SUCCESS; | |
497 | } | |
498 | ||
499 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
500 | { | |
501 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
502 | } | |
503 | ||
504 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
505 | struct sk_buff_head *list) | |
506 | { | |
507 | struct sk_buff *skb = __skb_dequeue(list); | |
508 | ||
9190b3b3 | 509 | if (likely(skb != NULL)) { |
0abf77e5 | 510 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9190b3b3 ED |
511 | qdisc_bstats_update(sch, skb); |
512 | } | |
9972b25d TG |
513 | |
514 | return skb; | |
515 | } | |
516 | ||
517 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
518 | { | |
519 | return __qdisc_dequeue_head(sch, &sch->q); | |
57dbb2d8 HPP |
520 | } |
521 | ||
522 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, | |
523 | struct sk_buff_head *list) | |
524 | { | |
9190b3b3 | 525 | struct sk_buff *skb = __skb_dequeue(list); |
57dbb2d8 HPP |
526 | |
527 | if (likely(skb != NULL)) { | |
528 | unsigned int len = qdisc_pkt_len(skb); | |
9190b3b3 | 529 | sch->qstats.backlog -= len; |
57dbb2d8 HPP |
530 | kfree_skb(skb); |
531 | return len; | |
532 | } | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch) | |
538 | { | |
539 | return __qdisc_queue_drop_head(sch, &sch->q); | |
9972b25d TG |
540 | } |
541 | ||
542 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
543 | struct sk_buff_head *list) | |
544 | { | |
545 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
546 | ||
547 | if (likely(skb != NULL)) | |
0abf77e5 | 548 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9972b25d TG |
549 | |
550 | return skb; | |
551 | } | |
552 | ||
553 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
554 | { | |
555 | return __qdisc_dequeue_tail(sch, &sch->q); | |
556 | } | |
557 | ||
48a8f519 PM |
558 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
559 | { | |
560 | return skb_peek(&sch->q); | |
561 | } | |
562 | ||
77be155c JP |
563 | /* generic pseudo peek method for non-work-conserving qdisc */ |
564 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
565 | { | |
566 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ | |
61c9eaf9 | 567 | if (!sch->gso_skb) { |
77be155c | 568 | sch->gso_skb = sch->dequeue(sch); |
61c9eaf9 JP |
569 | if (sch->gso_skb) |
570 | /* it's still part of the queue */ | |
571 | sch->q.qlen++; | |
572 | } | |
77be155c JP |
573 | |
574 | return sch->gso_skb; | |
575 | } | |
576 | ||
577 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
578 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
579 | { | |
580 | struct sk_buff *skb = sch->gso_skb; | |
581 | ||
61c9eaf9 | 582 | if (skb) { |
77be155c | 583 | sch->gso_skb = NULL; |
61c9eaf9 JP |
584 | sch->q.qlen--; |
585 | } else { | |
77be155c | 586 | skb = sch->dequeue(sch); |
61c9eaf9 | 587 | } |
77be155c JP |
588 | |
589 | return skb; | |
590 | } | |
591 | ||
9972b25d TG |
592 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
593 | struct sk_buff_head *list) | |
594 | { | |
595 | /* | |
596 | * We do not know the backlog in bytes of this list, it | |
597 | * is up to the caller to correct it | |
598 | */ | |
93245dd6 | 599 | __skb_queue_purge(list); |
9972b25d TG |
600 | } |
601 | ||
602 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
603 | { | |
604 | __qdisc_reset_queue(sch, &sch->q); | |
605 | sch->qstats.backlog = 0; | |
606 | } | |
607 | ||
608 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
609 | struct sk_buff_head *list) | |
610 | { | |
611 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
612 | ||
613 | if (likely(skb != NULL)) { | |
0abf77e5 | 614 | unsigned int len = qdisc_pkt_len(skb); |
9972b25d TG |
615 | kfree_skb(skb); |
616 | return len; | |
617 | } | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
623 | { | |
624 | return __qdisc_queue_drop(sch, &sch->q); | |
625 | } | |
626 | ||
627 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
628 | { | |
629 | kfree_skb(skb); | |
630 | sch->qstats.drops++; | |
631 | ||
632 | return NET_XMIT_DROP; | |
633 | } | |
634 | ||
635 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
636 | { | |
637 | sch->qstats.drops++; | |
638 | ||
c3bc7cff | 639 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
640 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
641 | goto drop; | |
642 | ||
643 | return NET_XMIT_SUCCESS; | |
644 | ||
645 | drop: | |
646 | #endif | |
647 | kfree_skb(skb); | |
648 | return NET_XMIT_DROP; | |
649 | } | |
650 | ||
e9bef55d JDB |
651 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
652 | long it will take to send a packet given its size. | |
653 | */ | |
654 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
655 | { | |
e08b0998 JDB |
656 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
657 | if (slot < 0) | |
658 | slot = 0; | |
e9bef55d JDB |
659 | slot >>= rtab->rate.cell_log; |
660 | if (slot > 255) | |
a02cec21 | 661 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
662 | return rtab->data[slot]; |
663 | } | |
664 | ||
12da81d1 | 665 | #ifdef CONFIG_NET_CLS_ACT |
210d6de7 CG |
666 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask, |
667 | int action) | |
12da81d1 | 668 | { |
210d6de7 CG |
669 | struct sk_buff *n; |
670 | ||
17302107 | 671 | n = skb_clone(skb, gfp_mask); |
12da81d1 JHS |
672 | |
673 | if (n) { | |
674 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
675 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
676 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
677 | } |
678 | return n; | |
679 | } | |
680 | #endif | |
681 | ||
292f1c7f JP |
682 | struct psched_ratecfg { |
683 | u64 rate_bps; | |
684 | u32 mult; | |
685 | u32 shift; | |
686 | }; | |
687 | ||
688 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
689 | unsigned int len) | |
690 | { | |
691 | return ((u64)len * r->mult) >> r->shift; | |
692 | } | |
693 | ||
694 | extern void psched_ratecfg_precompute(struct psched_ratecfg *r, u32 rate); | |
695 | ||
696 | static inline u32 psched_ratecfg_getrate(const struct psched_ratecfg *r) | |
697 | { | |
698 | return r->rate_bps >> 3; | |
699 | } | |
700 | ||
1da177e4 | 701 | #endif |