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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) |
45203a3b | 61 | u32 limit; |
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; | |
1da177e4 LT |
67 | int (*reshape_fail)(struct sk_buff *skb, |
68 | struct Qdisc *q); | |
69 | ||
72b25a91 DM |
70 | void *u32_node; |
71 | ||
1da177e4 LT |
72 | /* This field is deprecated, but it is still used by CBQ |
73 | * and it will live until better solution will be invented. | |
74 | */ | |
75 | struct Qdisc *__parent; | |
5e140dfc | 76 | struct netdev_queue *dev_queue; |
5e140dfc | 77 | |
45203a3b ED |
78 | struct gnet_stats_rate_est64 rate_est; |
79 | struct Qdisc *next_sched; | |
5e140dfc ED |
80 | struct sk_buff *gso_skb; |
81 | /* | |
82 | * For performance sake on SMP, we put highly modified fields at the end | |
83 | */ | |
84 | unsigned long state; | |
85 | struct sk_buff_head q; | |
c1a8f1f1 | 86 | struct gnet_stats_basic_packed bstats; |
fd245a4a | 87 | unsigned int __state; |
5e140dfc | 88 | struct gnet_stats_queue qstats; |
79640a4c | 89 | struct rcu_head rcu_head; |
45203a3b ED |
90 | int padded; |
91 | atomic_t refcnt; | |
92 | ||
93 | spinlock_t busylock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
94 | }; |
95 | ||
fd245a4a | 96 | static inline bool qdisc_is_running(const struct Qdisc *qdisc) |
bc135b23 | 97 | { |
fd245a4a | 98 | return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false; |
bc135b23 ED |
99 | } |
100 | ||
101 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) | |
102 | { | |
fd245a4a ED |
103 | if (qdisc_is_running(qdisc)) |
104 | return false; | |
105 | qdisc->__state |= __QDISC___STATE_RUNNING; | |
106 | return true; | |
bc135b23 ED |
107 | } |
108 | ||
109 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
110 | { | |
fd245a4a ED |
111 | qdisc->__state &= ~__QDISC___STATE_RUNNING; |
112 | } | |
113 | ||
114 | static inline bool qdisc_is_throttled(const struct Qdisc *qdisc) | |
115 | { | |
ef352e7c | 116 | return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false; |
fd245a4a ED |
117 | } |
118 | ||
119 | static inline void qdisc_throttled(struct Qdisc *qdisc) | |
120 | { | |
ef352e7c | 121 | set_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
fd245a4a ED |
122 | } |
123 | ||
124 | static inline void qdisc_unthrottled(struct Qdisc *qdisc) | |
125 | { | |
ef352e7c | 126 | clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
bc135b23 ED |
127 | } |
128 | ||
fd2c3ef7 | 129 | struct Qdisc_class_ops { |
1da177e4 | 130 | /* Child qdisc manipulation */ |
926e61b7 | 131 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 LT |
132 | int (*graft)(struct Qdisc *, unsigned long cl, |
133 | struct Qdisc *, struct Qdisc **); | |
134 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 135 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
136 | |
137 | /* Class manipulation routines */ | |
138 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
139 | void (*put)(struct Qdisc *, unsigned long); | |
140 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 141 | struct nlattr **, unsigned long *); |
1da177e4 LT |
142 | int (*delete)(struct Qdisc *, unsigned long); |
143 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
144 | ||
145 | /* Filter manipulation */ | |
146 | struct tcf_proto ** (*tcf_chain)(struct Qdisc *, unsigned long); | |
147 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, | |
148 | u32 classid); | |
149 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
150 | ||
151 | /* rtnetlink specific */ | |
152 | int (*dump)(struct Qdisc *, unsigned long, | |
153 | struct sk_buff *skb, struct tcmsg*); | |
154 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
155 | struct gnet_dump *); | |
156 | }; | |
157 | ||
fd2c3ef7 | 158 | struct Qdisc_ops { |
1da177e4 | 159 | struct Qdisc_ops *next; |
20fea08b | 160 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
161 | char id[IFNAMSIZ]; |
162 | int priv_size; | |
163 | ||
164 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
165 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
90d841fd | 166 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 LT |
167 | unsigned int (*drop)(struct Qdisc *); |
168 | ||
1e90474c | 169 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
170 | void (*reset)(struct Qdisc *); |
171 | void (*destroy)(struct Qdisc *); | |
1e90474c | 172 | int (*change)(struct Qdisc *, struct nlattr *arg); |
6ec1c69a | 173 | void (*attach)(struct Qdisc *); |
1da177e4 LT |
174 | |
175 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
176 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
177 | ||
178 | struct module *owner; | |
179 | }; | |
180 | ||
181 | ||
fd2c3ef7 | 182 | struct tcf_result { |
1da177e4 LT |
183 | unsigned long class; |
184 | u32 classid; | |
185 | }; | |
186 | ||
fd2c3ef7 | 187 | struct tcf_proto_ops { |
36272874 | 188 | struct list_head head; |
1da177e4 LT |
189 | char kind[IFNAMSIZ]; |
190 | ||
dc7f9f6e ED |
191 | int (*classify)(struct sk_buff *, |
192 | const struct tcf_proto *, | |
193 | struct tcf_result *); | |
1da177e4 LT |
194 | int (*init)(struct tcf_proto*); |
195 | void (*destroy)(struct tcf_proto*); | |
196 | ||
197 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
198 | void (*put)(struct tcf_proto*, unsigned long); | |
c1b52739 | 199 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 200 | struct tcf_proto*, unsigned long, |
add93b61 | 201 | u32 handle, struct nlattr **, |
2f7ef2f8 | 202 | unsigned long *, bool); |
1da177e4 LT |
203 | int (*delete)(struct tcf_proto*, unsigned long); |
204 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
205 | ||
206 | /* rtnetlink specific */ | |
832d1d5b | 207 | int (*dump)(struct net*, struct tcf_proto*, unsigned long, |
1da177e4 LT |
208 | struct sk_buff *skb, struct tcmsg*); |
209 | ||
210 | struct module *owner; | |
211 | }; | |
212 | ||
fd2c3ef7 | 213 | struct tcf_proto { |
1da177e4 LT |
214 | /* Fast access part */ |
215 | struct tcf_proto *next; | |
216 | void *root; | |
dc7f9f6e ED |
217 | int (*classify)(struct sk_buff *, |
218 | const struct tcf_proto *, | |
219 | struct tcf_result *); | |
66c6f529 | 220 | __be16 protocol; |
1da177e4 LT |
221 | |
222 | /* All the rest */ | |
223 | u32 prio; | |
224 | u32 classid; | |
225 | struct Qdisc *q; | |
226 | void *data; | |
dc7f9f6e | 227 | const struct tcf_proto_ops *ops; |
1da177e4 LT |
228 | }; |
229 | ||
175f9c1b JK |
230 | struct qdisc_skb_cb { |
231 | unsigned int pkt_len; | |
df4ab5b3 | 232 | u16 slave_dev_queue_mapping; |
5ee31c68 | 233 | u16 _pad; |
e0f31d84 | 234 | unsigned char data[24]; |
175f9c1b JK |
235 | }; |
236 | ||
16bda13d DM |
237 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
238 | { | |
239 | struct qdisc_skb_cb *qcb; | |
5ee31c68 ED |
240 | |
241 | BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); | |
16bda13d DM |
242 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
243 | } | |
244 | ||
05bdd2f1 | 245 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
246 | { |
247 | return q->q.qlen; | |
248 | } | |
249 | ||
bfe0d029 | 250 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
251 | { |
252 | return (struct qdisc_skb_cb *)skb->cb; | |
253 | } | |
254 | ||
83874000 DM |
255 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
256 | { | |
257 | return &qdisc->q.lock; | |
258 | } | |
259 | ||
05bdd2f1 | 260 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc DM |
261 | { |
262 | return qdisc->dev_queue->qdisc; | |
263 | } | |
264 | ||
05bdd2f1 | 265 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
266 | { |
267 | return qdisc->dev_queue->qdisc_sleeping; | |
268 | } | |
269 | ||
7e43f112 DM |
270 | /* The qdisc root lock is a mechanism by which to top level |
271 | * of a qdisc tree can be locked from any qdisc node in the | |
272 | * forest. This allows changing the configuration of some | |
273 | * aspect of the qdisc tree while blocking out asynchronous | |
274 | * qdisc access in the packet processing paths. | |
275 | * | |
276 | * It is only legal to do this when the root will not change | |
277 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
278 | * root. This is enforced by holding the RTNL semaphore, which | |
279 | * all users of this lock accessor must do. | |
280 | */ | |
05bdd2f1 | 281 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
282 | { |
283 | struct Qdisc *root = qdisc_root(qdisc); | |
284 | ||
7e43f112 | 285 | ASSERT_RTNL(); |
83874000 | 286 | return qdisc_lock(root); |
7698b4fc DM |
287 | } |
288 | ||
05bdd2f1 | 289 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
290 | { |
291 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
292 | ||
293 | ASSERT_RTNL(); | |
294 | return qdisc_lock(root); | |
295 | } | |
296 | ||
05bdd2f1 | 297 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
298 | { |
299 | return qdisc->dev_queue->dev; | |
300 | } | |
1da177e4 | 301 | |
05bdd2f1 | 302 | static inline void sch_tree_lock(const struct Qdisc *q) |
78a5b30b | 303 | { |
fe439dd0 | 304 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
305 | } |
306 | ||
05bdd2f1 | 307 | static inline void sch_tree_unlock(const struct Qdisc *q) |
78a5b30b | 308 | { |
fe439dd0 | 309 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
310 | } |
311 | ||
312 | #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) | |
313 | #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) | |
1da177e4 | 314 | |
e41a33e6 TG |
315 | extern struct Qdisc noop_qdisc; |
316 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
317 | extern struct Qdisc_ops pfifo_fast_ops; |
318 | extern struct Qdisc_ops mq_qdisc_ops; | |
6da7c8fc | 319 | extern const struct Qdisc_ops *default_qdisc_ops; |
e41a33e6 | 320 | |
fd2c3ef7 | 321 | struct Qdisc_class_common { |
6fe1c7a5 PM |
322 | u32 classid; |
323 | struct hlist_node hnode; | |
324 | }; | |
325 | ||
fd2c3ef7 | 326 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
327 | struct hlist_head *hash; |
328 | unsigned int hashsize; | |
329 | unsigned int hashmask; | |
330 | unsigned int hashelems; | |
331 | }; | |
332 | ||
333 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
334 | { | |
335 | id ^= id >> 8; | |
336 | id ^= id >> 4; | |
337 | return id & mask; | |
338 | } | |
339 | ||
340 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 341 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
342 | { |
343 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
344 | unsigned int h; |
345 | ||
346 | h = qdisc_class_hash(id, hash->hashmask); | |
b67bfe0d | 347 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
348 | if (cl->classid == id) |
349 | return cl; | |
350 | } | |
351 | return NULL; | |
352 | } | |
353 | ||
5c15257f JP |
354 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
355 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, | |
356 | struct Qdisc_class_common *); | |
357 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, | |
358 | struct Qdisc_class_common *); | |
359 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
360 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
361 | ||
362 | void dev_init_scheduler(struct net_device *dev); | |
363 | void dev_shutdown(struct net_device *dev); | |
364 | void dev_activate(struct net_device *dev); | |
365 | void dev_deactivate(struct net_device *dev); | |
366 | void dev_deactivate_many(struct list_head *head); | |
367 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, | |
368 | struct Qdisc *qdisc); | |
369 | void qdisc_reset(struct Qdisc *qdisc); | |
370 | void qdisc_destroy(struct Qdisc *qdisc); | |
371 | void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); | |
372 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, | |
d2a7f269 | 373 | const struct Qdisc_ops *ops); |
5c15257f | 374 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
d2a7f269 | 375 | const struct Qdisc_ops *ops, u32 parentid); |
5c15257f JP |
376 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
377 | const struct qdisc_size_table *stab); | |
378 | void tcf_destroy(struct tcf_proto *tp); | |
379 | void tcf_destroy_chain(struct tcf_proto **fl); | |
1da177e4 | 380 | |
f0796d5c JF |
381 | /* Reset all TX qdiscs greater then index of a device. */ |
382 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) | |
5aa70995 | 383 | { |
4ef6acff JF |
384 | struct Qdisc *qdisc; |
385 | ||
f0796d5c | 386 | for (; i < dev->num_tx_queues; i++) { |
4ef6acff JF |
387 | qdisc = netdev_get_tx_queue(dev, i)->qdisc; |
388 | if (qdisc) { | |
389 | spin_lock_bh(qdisc_lock(qdisc)); | |
390 | qdisc_reset(qdisc); | |
391 | spin_unlock_bh(qdisc_lock(qdisc)); | |
392 | } | |
393 | } | |
5aa70995 DM |
394 | } |
395 | ||
5aa70995 DM |
396 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
397 | { | |
f0796d5c | 398 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
399 | } |
400 | ||
3e745dd6 DM |
401 | /* Are all TX queues of the device empty? */ |
402 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
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 | const struct Qdisc *q = txq->qdisc; | |
3e745dd6 | 408 | |
e8a0464c DM |
409 | if (q->q.qlen) |
410 | return false; | |
411 | } | |
412 | return true; | |
3e745dd6 DM |
413 | } |
414 | ||
6fa9864b | 415 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 416 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 417 | { |
e8a0464c DM |
418 | unsigned int i; |
419 | for (i = 0; i < dev->num_tx_queues; i++) { | |
420 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
421 | if (txq->qdisc != txq->qdisc_sleeping) | |
422 | return true; | |
423 | } | |
424 | return false; | |
6fa9864b DM |
425 | } |
426 | ||
e8a0464c | 427 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
428 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
429 | { | |
e8a0464c DM |
430 | unsigned int i; |
431 | for (i = 0; i < dev->num_tx_queues; i++) { | |
432 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
433 | if (txq->qdisc != &noop_qdisc) | |
434 | return false; | |
435 | } | |
436 | return true; | |
05297949 DM |
437 | } |
438 | ||
bfe0d029 | 439 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 440 | { |
175f9c1b | 441 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
442 | } |
443 | ||
c27f339a | 444 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
445 | enum net_xmit_qdisc_t { |
446 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 447 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
448 | }; |
449 | ||
c27f339a | 450 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 451 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
452 | #else |
453 | #define net_xmit_drop_count(e) (1) | |
454 | #endif | |
455 | ||
a2da570d ED |
456 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
457 | const struct Qdisc *sch) | |
5f86173b | 458 | { |
3a682fbd | 459 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
460 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
461 | ||
462 | if (stab) | |
463 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 464 | #endif |
a2da570d ED |
465 | } |
466 | ||
467 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) | |
468 | { | |
469 | qdisc_calculate_pkt_len(skb, sch); | |
5f86173b JK |
470 | return sch->enqueue(skb, sch); |
471 | } | |
472 | ||
473 | static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) | |
474 | { | |
175f9c1b | 475 | qdisc_skb_cb(skb)->pkt_len = skb->len; |
378a2f09 | 476 | return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; |
5f86173b JK |
477 | } |
478 | ||
bfe0d029 ED |
479 | |
480 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, | |
481 | const struct sk_buff *skb) | |
482 | { | |
483 | bstats->bytes += qdisc_pkt_len(skb); | |
484 | bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; | |
485 | } | |
486 | ||
487 | static inline void qdisc_bstats_update(struct Qdisc *sch, | |
488 | const struct sk_buff *skb) | |
bbd8a0d3 | 489 | { |
bfe0d029 | 490 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
491 | } |
492 | ||
9972b25d TG |
493 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
494 | struct sk_buff_head *list) | |
495 | { | |
496 | __skb_queue_tail(list, skb); | |
0abf77e5 | 497 | sch->qstats.backlog += qdisc_pkt_len(skb); |
9972b25d TG |
498 | |
499 | return NET_XMIT_SUCCESS; | |
500 | } | |
501 | ||
502 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
503 | { | |
504 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
505 | } | |
506 | ||
507 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
508 | struct sk_buff_head *list) | |
509 | { | |
510 | struct sk_buff *skb = __skb_dequeue(list); | |
511 | ||
9190b3b3 | 512 | if (likely(skb != NULL)) { |
0abf77e5 | 513 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9190b3b3 ED |
514 | qdisc_bstats_update(sch, skb); |
515 | } | |
9972b25d TG |
516 | |
517 | return skb; | |
518 | } | |
519 | ||
520 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
521 | { | |
522 | return __qdisc_dequeue_head(sch, &sch->q); | |
57dbb2d8 HPP |
523 | } |
524 | ||
525 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, | |
526 | struct sk_buff_head *list) | |
527 | { | |
9190b3b3 | 528 | struct sk_buff *skb = __skb_dequeue(list); |
57dbb2d8 HPP |
529 | |
530 | if (likely(skb != NULL)) { | |
531 | unsigned int len = qdisc_pkt_len(skb); | |
9190b3b3 | 532 | sch->qstats.backlog -= len; |
57dbb2d8 HPP |
533 | kfree_skb(skb); |
534 | return len; | |
535 | } | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch) | |
541 | { | |
542 | return __qdisc_queue_drop_head(sch, &sch->q); | |
9972b25d TG |
543 | } |
544 | ||
545 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
546 | struct sk_buff_head *list) | |
547 | { | |
548 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
549 | ||
550 | if (likely(skb != NULL)) | |
0abf77e5 | 551 | sch->qstats.backlog -= qdisc_pkt_len(skb); |
9972b25d TG |
552 | |
553 | return skb; | |
554 | } | |
555 | ||
556 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
557 | { | |
558 | return __qdisc_dequeue_tail(sch, &sch->q); | |
559 | } | |
560 | ||
48a8f519 PM |
561 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
562 | { | |
563 | return skb_peek(&sch->q); | |
564 | } | |
565 | ||
77be155c JP |
566 | /* generic pseudo peek method for non-work-conserving qdisc */ |
567 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
568 | { | |
569 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ | |
61c9eaf9 | 570 | if (!sch->gso_skb) { |
77be155c | 571 | sch->gso_skb = sch->dequeue(sch); |
61c9eaf9 JP |
572 | if (sch->gso_skb) |
573 | /* it's still part of the queue */ | |
574 | sch->q.qlen++; | |
575 | } | |
77be155c JP |
576 | |
577 | return sch->gso_skb; | |
578 | } | |
579 | ||
580 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
581 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
582 | { | |
583 | struct sk_buff *skb = sch->gso_skb; | |
584 | ||
61c9eaf9 | 585 | if (skb) { |
77be155c | 586 | sch->gso_skb = NULL; |
61c9eaf9 JP |
587 | sch->q.qlen--; |
588 | } else { | |
77be155c | 589 | skb = sch->dequeue(sch); |
61c9eaf9 | 590 | } |
77be155c JP |
591 | |
592 | return skb; | |
593 | } | |
594 | ||
9972b25d TG |
595 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
596 | struct sk_buff_head *list) | |
597 | { | |
598 | /* | |
599 | * We do not know the backlog in bytes of this list, it | |
600 | * is up to the caller to correct it | |
601 | */ | |
93245dd6 | 602 | __skb_queue_purge(list); |
9972b25d TG |
603 | } |
604 | ||
605 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
606 | { | |
607 | __qdisc_reset_queue(sch, &sch->q); | |
608 | sch->qstats.backlog = 0; | |
609 | } | |
610 | ||
611 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
612 | struct sk_buff_head *list) | |
613 | { | |
614 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
615 | ||
616 | if (likely(skb != NULL)) { | |
0abf77e5 | 617 | unsigned int len = qdisc_pkt_len(skb); |
9972b25d TG |
618 | kfree_skb(skb); |
619 | return len; | |
620 | } | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
626 | { | |
627 | return __qdisc_queue_drop(sch, &sch->q); | |
628 | } | |
629 | ||
630 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
631 | { | |
632 | kfree_skb(skb); | |
633 | sch->qstats.drops++; | |
634 | ||
635 | return NET_XMIT_DROP; | |
636 | } | |
637 | ||
638 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
639 | { | |
640 | sch->qstats.drops++; | |
641 | ||
c3bc7cff | 642 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
643 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
644 | goto drop; | |
645 | ||
646 | return NET_XMIT_SUCCESS; | |
647 | ||
648 | drop: | |
649 | #endif | |
650 | kfree_skb(skb); | |
651 | return NET_XMIT_DROP; | |
652 | } | |
653 | ||
e9bef55d JDB |
654 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
655 | long it will take to send a packet given its size. | |
656 | */ | |
657 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
658 | { | |
e08b0998 JDB |
659 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
660 | if (slot < 0) | |
661 | slot = 0; | |
e9bef55d JDB |
662 | slot >>= rtab->rate.cell_log; |
663 | if (slot > 255) | |
a02cec21 | 664 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
665 | return rtab->data[slot]; |
666 | } | |
667 | ||
12da81d1 | 668 | #ifdef CONFIG_NET_CLS_ACT |
210d6de7 CG |
669 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask, |
670 | int action) | |
12da81d1 | 671 | { |
210d6de7 CG |
672 | struct sk_buff *n; |
673 | ||
17302107 | 674 | n = skb_clone(skb, gfp_mask); |
12da81d1 JHS |
675 | |
676 | if (n) { | |
677 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
678 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
679 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
680 | } |
681 | return n; | |
682 | } | |
683 | #endif | |
684 | ||
292f1c7f | 685 | struct psched_ratecfg { |
130d3d68 | 686 | u64 rate_bytes_ps; /* bytes per second */ |
01cb71d2 ED |
687 | u32 mult; |
688 | u16 overhead; | |
8a8e3d84 | 689 | u8 linklayer; |
01cb71d2 | 690 | u8 shift; |
292f1c7f JP |
691 | }; |
692 | ||
693 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
694 | unsigned int len) | |
695 | { | |
8a8e3d84 JDB |
696 | len += r->overhead; |
697 | ||
698 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) | |
699 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
700 | ||
701 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
702 | } |
703 | ||
5c15257f | 704 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
3e1e3aae ED |
705 | const struct tc_ratespec *conf, |
706 | u64 rate64); | |
292f1c7f | 707 | |
01cb71d2 ED |
708 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
709 | const struct psched_ratecfg *r) | |
292f1c7f | 710 | { |
01cb71d2 | 711 | memset(res, 0, sizeof(*res)); |
3e1e3aae ED |
712 | |
713 | /* legacy struct tc_ratespec has a 32bit @rate field | |
714 | * Qdisc using 64bit rate should add new attributes | |
715 | * in order to maintain compatibility. | |
716 | */ | |
717 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); | |
718 | ||
01cb71d2 | 719 | res->overhead = r->overhead; |
8a8e3d84 | 720 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
721 | } |
722 | ||
1da177e4 | 723 | #endif |