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> | |
22e0f8b9 | 9 | #include <linux/percpu.h> |
1da177e4 | 10 | #include <net/gen_stats.h> |
be577ddc | 11 | #include <net/rtnetlink.h> |
1da177e4 LT |
12 | |
13 | struct Qdisc_ops; | |
14 | struct qdisc_walker; | |
15 | struct tcf_walker; | |
16 | struct module; | |
17 | ||
fd2c3ef7 | 18 | struct qdisc_rate_table { |
1da177e4 LT |
19 | struct tc_ratespec rate; |
20 | u32 data[256]; | |
21 | struct qdisc_rate_table *next; | |
22 | int refcnt; | |
23 | }; | |
24 | ||
fd2c3ef7 | 25 | enum qdisc_state_t { |
37437bb2 | 26 | __QDISC_STATE_SCHED, |
a9312ae8 | 27 | __QDISC_STATE_DEACTIVATED, |
ef352e7c | 28 | __QDISC_STATE_THROTTLED, |
e2627c8c DM |
29 | }; |
30 | ||
37112105 ED |
31 | /* |
32 | * following bits are only changed while qdisc lock is held | |
33 | */ | |
34 | enum qdisc___state_t { | |
fd245a4a | 35 | __QDISC___STATE_RUNNING = 1, |
37112105 ED |
36 | }; |
37 | ||
175f9c1b | 38 | struct qdisc_size_table { |
a2da570d | 39 | struct rcu_head rcu; |
175f9c1b JK |
40 | struct list_head list; |
41 | struct tc_sizespec szopts; | |
42 | int refcnt; | |
43 | u16 data[]; | |
44 | }; | |
45 | ||
fd2c3ef7 | 46 | struct Qdisc { |
1da177e4 LT |
47 | int (*enqueue)(struct sk_buff *skb, struct Qdisc *dev); |
48 | struct sk_buff * (*dequeue)(struct Qdisc *dev); | |
05bdd2f1 | 49 | unsigned int flags; |
b00355db | 50 | #define TCQ_F_BUILTIN 1 |
fd245a4a ED |
51 | #define TCQ_F_INGRESS 2 |
52 | #define TCQ_F_CAN_BYPASS 4 | |
53 | #define TCQ_F_MQROOT 8 | |
1abbe139 ED |
54 | #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for |
55 | * q->dev_queue : It can test | |
56 | * netif_xmit_frozen_or_stopped() before | |
57 | * dequeueing next packet. | |
58 | * Its true for MQ/MQPRIO slaves, or non | |
59 | * multiqueue device. | |
60 | */ | |
b00355db | 61 | #define TCQ_F_WARN_NONWC (1 << 16) |
22e0f8b9 | 62 | #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */ |
45203a3b | 63 | u32 limit; |
05bdd2f1 | 64 | const struct Qdisc_ops *ops; |
a2da570d | 65 | struct qdisc_size_table __rcu *stab; |
5e140dfc | 66 | struct list_head list; |
1da177e4 LT |
67 | u32 handle; |
68 | u32 parent; | |
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 | 78 | struct netdev_queue *dev_queue; |
5e140dfc | 79 | |
45203a3b ED |
80 | struct gnet_stats_rate_est64 rate_est; |
81 | struct Qdisc *next_sched; | |
5e140dfc ED |
82 | struct sk_buff *gso_skb; |
83 | /* | |
84 | * For performance sake on SMP, we put highly modified fields at the end | |
85 | */ | |
86 | unsigned long state; | |
87 | struct sk_buff_head q; | |
22e0f8b9 JF |
88 | union { |
89 | struct gnet_stats_basic_packed bstats; | |
90 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; | |
91 | } __packed; | |
fd245a4a | 92 | unsigned int __state; |
b0ab6f92 JF |
93 | union { |
94 | struct gnet_stats_queue qstats; | |
95 | struct gnet_stats_queue __percpu *cpu_qstats; | |
96 | } __packed; | |
79640a4c | 97 | struct rcu_head rcu_head; |
45203a3b ED |
98 | int padded; |
99 | atomic_t refcnt; | |
100 | ||
101 | spinlock_t busylock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
102 | }; |
103 | ||
fd245a4a | 104 | static inline bool qdisc_is_running(const struct Qdisc *qdisc) |
bc135b23 | 105 | { |
fd245a4a | 106 | return (qdisc->__state & __QDISC___STATE_RUNNING) ? true : false; |
bc135b23 ED |
107 | } |
108 | ||
109 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) | |
110 | { | |
fd245a4a ED |
111 | if (qdisc_is_running(qdisc)) |
112 | return false; | |
113 | qdisc->__state |= __QDISC___STATE_RUNNING; | |
114 | return true; | |
bc135b23 ED |
115 | } |
116 | ||
117 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
118 | { | |
fd245a4a ED |
119 | qdisc->__state &= ~__QDISC___STATE_RUNNING; |
120 | } | |
121 | ||
122 | static inline bool qdisc_is_throttled(const struct Qdisc *qdisc) | |
123 | { | |
ef352e7c | 124 | return test_bit(__QDISC_STATE_THROTTLED, &qdisc->state) ? true : false; |
fd245a4a ED |
125 | } |
126 | ||
127 | static inline void qdisc_throttled(struct Qdisc *qdisc) | |
128 | { | |
ef352e7c | 129 | set_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
fd245a4a ED |
130 | } |
131 | ||
132 | static inline void qdisc_unthrottled(struct Qdisc *qdisc) | |
133 | { | |
ef352e7c | 134 | clear_bit(__QDISC_STATE_THROTTLED, &qdisc->state); |
bc135b23 ED |
135 | } |
136 | ||
fd2c3ef7 | 137 | struct Qdisc_class_ops { |
1da177e4 | 138 | /* Child qdisc manipulation */ |
926e61b7 | 139 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 LT |
140 | int (*graft)(struct Qdisc *, unsigned long cl, |
141 | struct Qdisc *, struct Qdisc **); | |
142 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); | |
43effa1e | 143 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
144 | |
145 | /* Class manipulation routines */ | |
146 | unsigned long (*get)(struct Qdisc *, u32 classid); | |
147 | void (*put)(struct Qdisc *, unsigned long); | |
148 | int (*change)(struct Qdisc *, u32, u32, | |
1e90474c | 149 | struct nlattr **, unsigned long *); |
1da177e4 LT |
150 | int (*delete)(struct Qdisc *, unsigned long); |
151 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
152 | ||
153 | /* Filter manipulation */ | |
25d8c0d5 | 154 | struct tcf_proto __rcu ** (*tcf_chain)(struct Qdisc *, unsigned long); |
1da177e4 LT |
155 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
156 | u32 classid); | |
157 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
158 | ||
159 | /* rtnetlink specific */ | |
160 | int (*dump)(struct Qdisc *, unsigned long, | |
161 | struct sk_buff *skb, struct tcmsg*); | |
162 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
163 | struct gnet_dump *); | |
164 | }; | |
165 | ||
fd2c3ef7 | 166 | struct Qdisc_ops { |
1da177e4 | 167 | struct Qdisc_ops *next; |
20fea08b | 168 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
169 | char id[IFNAMSIZ]; |
170 | int priv_size; | |
171 | ||
172 | int (*enqueue)(struct sk_buff *, struct Qdisc *); | |
173 | struct sk_buff * (*dequeue)(struct Qdisc *); | |
90d841fd | 174 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 LT |
175 | unsigned int (*drop)(struct Qdisc *); |
176 | ||
1e90474c | 177 | int (*init)(struct Qdisc *, struct nlattr *arg); |
1da177e4 LT |
178 | void (*reset)(struct Qdisc *); |
179 | void (*destroy)(struct Qdisc *); | |
1e90474c | 180 | int (*change)(struct Qdisc *, struct nlattr *arg); |
6ec1c69a | 181 | void (*attach)(struct Qdisc *); |
1da177e4 LT |
182 | |
183 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
184 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
185 | ||
186 | struct module *owner; | |
187 | }; | |
188 | ||
189 | ||
fd2c3ef7 | 190 | struct tcf_result { |
1da177e4 LT |
191 | unsigned long class; |
192 | u32 classid; | |
193 | }; | |
194 | ||
fd2c3ef7 | 195 | struct tcf_proto_ops { |
36272874 | 196 | struct list_head head; |
1da177e4 LT |
197 | char kind[IFNAMSIZ]; |
198 | ||
dc7f9f6e ED |
199 | int (*classify)(struct sk_buff *, |
200 | const struct tcf_proto *, | |
201 | struct tcf_result *); | |
1da177e4 LT |
202 | int (*init)(struct tcf_proto*); |
203 | void (*destroy)(struct tcf_proto*); | |
204 | ||
205 | unsigned long (*get)(struct tcf_proto*, u32 handle); | |
206 | void (*put)(struct tcf_proto*, unsigned long); | |
c1b52739 | 207 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 208 | struct tcf_proto*, unsigned long, |
add93b61 | 209 | u32 handle, struct nlattr **, |
2f7ef2f8 | 210 | unsigned long *, bool); |
1da177e4 LT |
211 | int (*delete)(struct tcf_proto*, unsigned long); |
212 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); | |
213 | ||
214 | /* rtnetlink specific */ | |
832d1d5b | 215 | int (*dump)(struct net*, struct tcf_proto*, unsigned long, |
1da177e4 LT |
216 | struct sk_buff *skb, struct tcmsg*); |
217 | ||
218 | struct module *owner; | |
219 | }; | |
220 | ||
fd2c3ef7 | 221 | struct tcf_proto { |
1da177e4 | 222 | /* Fast access part */ |
25d8c0d5 JF |
223 | struct tcf_proto __rcu *next; |
224 | void __rcu *root; | |
dc7f9f6e ED |
225 | int (*classify)(struct sk_buff *, |
226 | const struct tcf_proto *, | |
227 | struct tcf_result *); | |
66c6f529 | 228 | __be16 protocol; |
1da177e4 LT |
229 | |
230 | /* All the rest */ | |
231 | u32 prio; | |
232 | u32 classid; | |
233 | struct Qdisc *q; | |
234 | void *data; | |
dc7f9f6e | 235 | const struct tcf_proto_ops *ops; |
25d8c0d5 | 236 | struct rcu_head rcu; |
1da177e4 LT |
237 | }; |
238 | ||
175f9c1b JK |
239 | struct qdisc_skb_cb { |
240 | unsigned int pkt_len; | |
df4ab5b3 | 241 | u16 slave_dev_queue_mapping; |
5ee31c68 | 242 | u16 _pad; |
25711786 ED |
243 | #define QDISC_CB_PRIV_LEN 20 |
244 | unsigned char data[QDISC_CB_PRIV_LEN]; | |
175f9c1b JK |
245 | }; |
246 | ||
16bda13d DM |
247 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
248 | { | |
249 | struct qdisc_skb_cb *qcb; | |
5ee31c68 ED |
250 | |
251 | BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); | |
16bda13d DM |
252 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
253 | } | |
254 | ||
05bdd2f1 | 255 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
256 | { |
257 | return q->q.qlen; | |
258 | } | |
259 | ||
bfe0d029 | 260 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
261 | { |
262 | return (struct qdisc_skb_cb *)skb->cb; | |
263 | } | |
264 | ||
83874000 DM |
265 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
266 | { | |
267 | return &qdisc->q.lock; | |
268 | } | |
269 | ||
05bdd2f1 | 270 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc | 271 | { |
46e5da40 JF |
272 | struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc); |
273 | ||
274 | return q; | |
7698b4fc DM |
275 | } |
276 | ||
05bdd2f1 | 277 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
278 | { |
279 | return qdisc->dev_queue->qdisc_sleeping; | |
280 | } | |
281 | ||
7e43f112 DM |
282 | /* The qdisc root lock is a mechanism by which to top level |
283 | * of a qdisc tree can be locked from any qdisc node in the | |
284 | * forest. This allows changing the configuration of some | |
285 | * aspect of the qdisc tree while blocking out asynchronous | |
286 | * qdisc access in the packet processing paths. | |
287 | * | |
288 | * It is only legal to do this when the root will not change | |
289 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
290 | * root. This is enforced by holding the RTNL semaphore, which | |
291 | * all users of this lock accessor must do. | |
292 | */ | |
05bdd2f1 | 293 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
294 | { |
295 | struct Qdisc *root = qdisc_root(qdisc); | |
296 | ||
7e43f112 | 297 | ASSERT_RTNL(); |
83874000 | 298 | return qdisc_lock(root); |
7698b4fc DM |
299 | } |
300 | ||
05bdd2f1 | 301 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
302 | { |
303 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
304 | ||
305 | ASSERT_RTNL(); | |
306 | return qdisc_lock(root); | |
307 | } | |
308 | ||
05bdd2f1 | 309 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
310 | { |
311 | return qdisc->dev_queue->dev; | |
312 | } | |
1da177e4 | 313 | |
05bdd2f1 | 314 | static inline void sch_tree_lock(const struct Qdisc *q) |
78a5b30b | 315 | { |
fe439dd0 | 316 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
317 | } |
318 | ||
05bdd2f1 | 319 | static inline void sch_tree_unlock(const struct Qdisc *q) |
78a5b30b | 320 | { |
fe439dd0 | 321 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
322 | } |
323 | ||
324 | #define tcf_tree_lock(tp) sch_tree_lock((tp)->q) | |
325 | #define tcf_tree_unlock(tp) sch_tree_unlock((tp)->q) | |
1da177e4 | 326 | |
e41a33e6 TG |
327 | extern struct Qdisc noop_qdisc; |
328 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
329 | extern struct Qdisc_ops pfifo_fast_ops; |
330 | extern struct Qdisc_ops mq_qdisc_ops; | |
6da7c8fc | 331 | extern const struct Qdisc_ops *default_qdisc_ops; |
e41a33e6 | 332 | |
fd2c3ef7 | 333 | struct Qdisc_class_common { |
6fe1c7a5 PM |
334 | u32 classid; |
335 | struct hlist_node hnode; | |
336 | }; | |
337 | ||
fd2c3ef7 | 338 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
339 | struct hlist_head *hash; |
340 | unsigned int hashsize; | |
341 | unsigned int hashmask; | |
342 | unsigned int hashelems; | |
343 | }; | |
344 | ||
345 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
346 | { | |
347 | id ^= id >> 8; | |
348 | id ^= id >> 4; | |
349 | return id & mask; | |
350 | } | |
351 | ||
352 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 353 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
354 | { |
355 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
356 | unsigned int h; |
357 | ||
358 | h = qdisc_class_hash(id, hash->hashmask); | |
b67bfe0d | 359 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
360 | if (cl->classid == id) |
361 | return cl; | |
362 | } | |
363 | return NULL; | |
364 | } | |
365 | ||
5c15257f JP |
366 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
367 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, | |
368 | struct Qdisc_class_common *); | |
369 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, | |
370 | struct Qdisc_class_common *); | |
371 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
372 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
373 | ||
374 | void dev_init_scheduler(struct net_device *dev); | |
375 | void dev_shutdown(struct net_device *dev); | |
376 | void dev_activate(struct net_device *dev); | |
377 | void dev_deactivate(struct net_device *dev); | |
378 | void dev_deactivate_many(struct list_head *head); | |
379 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, | |
380 | struct Qdisc *qdisc); | |
381 | void qdisc_reset(struct Qdisc *qdisc); | |
382 | void qdisc_destroy(struct Qdisc *qdisc); | |
383 | void qdisc_tree_decrease_qlen(struct Qdisc *qdisc, unsigned int n); | |
384 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, | |
d2a7f269 | 385 | const struct Qdisc_ops *ops); |
5c15257f | 386 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
d2a7f269 | 387 | const struct Qdisc_ops *ops, u32 parentid); |
5c15257f JP |
388 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
389 | const struct qdisc_size_table *stab); | |
390 | void tcf_destroy(struct tcf_proto *tp); | |
25d8c0d5 | 391 | void tcf_destroy_chain(struct tcf_proto __rcu **fl); |
1da177e4 | 392 | |
f0796d5c JF |
393 | /* Reset all TX qdiscs greater then index of a device. */ |
394 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) | |
5aa70995 | 395 | { |
4ef6acff JF |
396 | struct Qdisc *qdisc; |
397 | ||
f0796d5c | 398 | for (; i < dev->num_tx_queues; i++) { |
46e5da40 | 399 | qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc); |
4ef6acff JF |
400 | if (qdisc) { |
401 | spin_lock_bh(qdisc_lock(qdisc)); | |
402 | qdisc_reset(qdisc); | |
403 | spin_unlock_bh(qdisc_lock(qdisc)); | |
404 | } | |
405 | } | |
5aa70995 DM |
406 | } |
407 | ||
5aa70995 DM |
408 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
409 | { | |
f0796d5c | 410 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
411 | } |
412 | ||
3e745dd6 DM |
413 | /* Are all TX queues of the device empty? */ |
414 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
415 | { | |
e8a0464c | 416 | unsigned int i; |
46e5da40 JF |
417 | |
418 | rcu_read_lock(); | |
e8a0464c DM |
419 | for (i = 0; i < dev->num_tx_queues; i++) { |
420 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 421 | const struct Qdisc *q = rcu_dereference(txq->qdisc); |
3e745dd6 | 422 | |
46e5da40 JF |
423 | if (q->q.qlen) { |
424 | rcu_read_unlock(); | |
e8a0464c | 425 | return false; |
46e5da40 | 426 | } |
e8a0464c | 427 | } |
46e5da40 | 428 | rcu_read_unlock(); |
e8a0464c | 429 | return true; |
3e745dd6 DM |
430 | } |
431 | ||
6fa9864b | 432 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 433 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 434 | { |
e8a0464c | 435 | unsigned int i; |
46e5da40 | 436 | |
e8a0464c DM |
437 | for (i = 0; i < dev->num_tx_queues; i++) { |
438 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 439 | if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping) |
e8a0464c DM |
440 | return true; |
441 | } | |
442 | return false; | |
6fa9864b DM |
443 | } |
444 | ||
e8a0464c | 445 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
446 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
447 | { | |
e8a0464c | 448 | unsigned int i; |
46e5da40 | 449 | |
e8a0464c DM |
450 | for (i = 0; i < dev->num_tx_queues; i++) { |
451 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 452 | if (rcu_access_pointer(txq->qdisc) != &noop_qdisc) |
e8a0464c DM |
453 | return false; |
454 | } | |
455 | return true; | |
05297949 DM |
456 | } |
457 | ||
bfe0d029 | 458 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 459 | { |
175f9c1b | 460 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
461 | } |
462 | ||
c27f339a | 463 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
464 | enum net_xmit_qdisc_t { |
465 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 466 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
467 | }; |
468 | ||
c27f339a | 469 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 470 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
471 | #else |
472 | #define net_xmit_drop_count(e) (1) | |
473 | #endif | |
474 | ||
a2da570d ED |
475 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
476 | const struct Qdisc *sch) | |
5f86173b | 477 | { |
3a682fbd | 478 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
479 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
480 | ||
481 | if (stab) | |
482 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 483 | #endif |
a2da570d ED |
484 | } |
485 | ||
486 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch) | |
487 | { | |
488 | qdisc_calculate_pkt_len(skb, sch); | |
5f86173b JK |
489 | return sch->enqueue(skb, sch); |
490 | } | |
491 | ||
492 | static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch) | |
493 | { | |
175f9c1b | 494 | qdisc_skb_cb(skb)->pkt_len = skb->len; |
378a2f09 | 495 | return qdisc_enqueue(skb, sch) & NET_XMIT_MASK; |
5f86173b JK |
496 | } |
497 | ||
22e0f8b9 JF |
498 | static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) |
499 | { | |
500 | return q->flags & TCQ_F_CPUSTATS; | |
501 | } | |
bfe0d029 ED |
502 | |
503 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, | |
504 | const struct sk_buff *skb) | |
505 | { | |
506 | bstats->bytes += qdisc_pkt_len(skb); | |
507 | bstats->packets += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; | |
508 | } | |
509 | ||
22e0f8b9 JF |
510 | static inline void qdisc_bstats_update_cpu(struct Qdisc *sch, |
511 | const struct sk_buff *skb) | |
512 | { | |
513 | struct gnet_stats_basic_cpu *bstats = | |
514 | this_cpu_ptr(sch->cpu_bstats); | |
515 | ||
516 | u64_stats_update_begin(&bstats->syncp); | |
517 | bstats_update(&bstats->bstats, skb); | |
518 | u64_stats_update_end(&bstats->syncp); | |
519 | } | |
520 | ||
bfe0d029 ED |
521 | static inline void qdisc_bstats_update(struct Qdisc *sch, |
522 | const struct sk_buff *skb) | |
bbd8a0d3 | 523 | { |
bfe0d029 | 524 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
525 | } |
526 | ||
25331d6c JF |
527 | static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch, |
528 | const struct sk_buff *skb) | |
529 | { | |
530 | sch->qstats.backlog -= qdisc_pkt_len(skb); | |
531 | } | |
532 | ||
533 | static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch, | |
534 | const struct sk_buff *skb) | |
535 | { | |
536 | sch->qstats.backlog += qdisc_pkt_len(skb); | |
537 | } | |
538 | ||
539 | static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count) | |
540 | { | |
541 | sch->qstats.drops += count; | |
542 | } | |
543 | ||
544 | static inline void qdisc_qstats_drop(struct Qdisc *sch) | |
545 | { | |
546 | sch->qstats.drops++; | |
547 | } | |
548 | ||
b0ab6f92 JF |
549 | static inline void qdisc_qstats_drop_cpu(struct Qdisc *sch) |
550 | { | |
551 | struct gnet_stats_queue *qstats = this_cpu_ptr(sch->cpu_qstats); | |
552 | ||
553 | qstats->drops++; | |
554 | } | |
555 | ||
25331d6c JF |
556 | static inline void qdisc_qstats_overlimit(struct Qdisc *sch) |
557 | { | |
558 | sch->qstats.overlimits++; | |
559 | } | |
560 | ||
9972b25d TG |
561 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
562 | struct sk_buff_head *list) | |
563 | { | |
564 | __skb_queue_tail(list, skb); | |
25331d6c | 565 | qdisc_qstats_backlog_inc(sch, skb); |
9972b25d TG |
566 | |
567 | return NET_XMIT_SUCCESS; | |
568 | } | |
569 | ||
570 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
571 | { | |
572 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
573 | } | |
574 | ||
575 | static inline struct sk_buff *__qdisc_dequeue_head(struct Qdisc *sch, | |
576 | struct sk_buff_head *list) | |
577 | { | |
578 | struct sk_buff *skb = __skb_dequeue(list); | |
579 | ||
9190b3b3 | 580 | if (likely(skb != NULL)) { |
25331d6c | 581 | qdisc_qstats_backlog_dec(sch, skb); |
9190b3b3 ED |
582 | qdisc_bstats_update(sch, skb); |
583 | } | |
9972b25d TG |
584 | |
585 | return skb; | |
586 | } | |
587 | ||
588 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
589 | { | |
590 | return __qdisc_dequeue_head(sch, &sch->q); | |
57dbb2d8 HPP |
591 | } |
592 | ||
593 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, | |
594 | struct sk_buff_head *list) | |
595 | { | |
9190b3b3 | 596 | struct sk_buff *skb = __skb_dequeue(list); |
57dbb2d8 HPP |
597 | |
598 | if (likely(skb != NULL)) { | |
599 | unsigned int len = qdisc_pkt_len(skb); | |
25331d6c | 600 | qdisc_qstats_backlog_dec(sch, skb); |
57dbb2d8 HPP |
601 | kfree_skb(skb); |
602 | return len; | |
603 | } | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
608 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch) | |
609 | { | |
610 | return __qdisc_queue_drop_head(sch, &sch->q); | |
9972b25d TG |
611 | } |
612 | ||
613 | static inline struct sk_buff *__qdisc_dequeue_tail(struct Qdisc *sch, | |
614 | struct sk_buff_head *list) | |
615 | { | |
616 | struct sk_buff *skb = __skb_dequeue_tail(list); | |
617 | ||
618 | if (likely(skb != NULL)) | |
25331d6c | 619 | qdisc_qstats_backlog_dec(sch, skb); |
9972b25d TG |
620 | |
621 | return skb; | |
622 | } | |
623 | ||
624 | static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) | |
625 | { | |
626 | return __qdisc_dequeue_tail(sch, &sch->q); | |
627 | } | |
628 | ||
48a8f519 PM |
629 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
630 | { | |
631 | return skb_peek(&sch->q); | |
632 | } | |
633 | ||
77be155c JP |
634 | /* generic pseudo peek method for non-work-conserving qdisc */ |
635 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
636 | { | |
637 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ | |
61c9eaf9 | 638 | if (!sch->gso_skb) { |
77be155c | 639 | sch->gso_skb = sch->dequeue(sch); |
61c9eaf9 JP |
640 | if (sch->gso_skb) |
641 | /* it's still part of the queue */ | |
642 | sch->q.qlen++; | |
643 | } | |
77be155c JP |
644 | |
645 | return sch->gso_skb; | |
646 | } | |
647 | ||
648 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
649 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
650 | { | |
651 | struct sk_buff *skb = sch->gso_skb; | |
652 | ||
61c9eaf9 | 653 | if (skb) { |
77be155c | 654 | sch->gso_skb = NULL; |
61c9eaf9 JP |
655 | sch->q.qlen--; |
656 | } else { | |
77be155c | 657 | skb = sch->dequeue(sch); |
61c9eaf9 | 658 | } |
77be155c JP |
659 | |
660 | return skb; | |
661 | } | |
662 | ||
9972b25d TG |
663 | static inline void __qdisc_reset_queue(struct Qdisc *sch, |
664 | struct sk_buff_head *list) | |
665 | { | |
666 | /* | |
667 | * We do not know the backlog in bytes of this list, it | |
668 | * is up to the caller to correct it | |
669 | */ | |
93245dd6 | 670 | __skb_queue_purge(list); |
9972b25d TG |
671 | } |
672 | ||
673 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
674 | { | |
675 | __qdisc_reset_queue(sch, &sch->q); | |
676 | sch->qstats.backlog = 0; | |
677 | } | |
678 | ||
679 | static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, | |
680 | struct sk_buff_head *list) | |
681 | { | |
682 | struct sk_buff *skb = __qdisc_dequeue_tail(sch, list); | |
683 | ||
684 | if (likely(skb != NULL)) { | |
0abf77e5 | 685 | unsigned int len = qdisc_pkt_len(skb); |
9972b25d TG |
686 | kfree_skb(skb); |
687 | return len; | |
688 | } | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
693 | static inline unsigned int qdisc_queue_drop(struct Qdisc *sch) | |
694 | { | |
695 | return __qdisc_queue_drop(sch, &sch->q); | |
696 | } | |
697 | ||
698 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) | |
699 | { | |
700 | kfree_skb(skb); | |
25331d6c | 701 | qdisc_qstats_drop(sch); |
9972b25d TG |
702 | |
703 | return NET_XMIT_DROP; | |
704 | } | |
705 | ||
706 | static inline int qdisc_reshape_fail(struct sk_buff *skb, struct Qdisc *sch) | |
707 | { | |
25331d6c | 708 | qdisc_qstats_drop(sch); |
9972b25d | 709 | |
c3bc7cff | 710 | #ifdef CONFIG_NET_CLS_ACT |
9972b25d TG |
711 | if (sch->reshape_fail == NULL || sch->reshape_fail(skb, sch)) |
712 | goto drop; | |
713 | ||
714 | return NET_XMIT_SUCCESS; | |
715 | ||
716 | drop: | |
717 | #endif | |
718 | kfree_skb(skb); | |
719 | return NET_XMIT_DROP; | |
720 | } | |
721 | ||
e9bef55d JDB |
722 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
723 | long it will take to send a packet given its size. | |
724 | */ | |
725 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
726 | { | |
e08b0998 JDB |
727 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
728 | if (slot < 0) | |
729 | slot = 0; | |
e9bef55d JDB |
730 | slot >>= rtab->rate.cell_log; |
731 | if (slot > 255) | |
a02cec21 | 732 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
733 | return rtab->data[slot]; |
734 | } | |
735 | ||
12da81d1 | 736 | #ifdef CONFIG_NET_CLS_ACT |
210d6de7 CG |
737 | static inline struct sk_buff *skb_act_clone(struct sk_buff *skb, gfp_t gfp_mask, |
738 | int action) | |
12da81d1 | 739 | { |
210d6de7 CG |
740 | struct sk_buff *n; |
741 | ||
17302107 | 742 | n = skb_clone(skb, gfp_mask); |
12da81d1 JHS |
743 | |
744 | if (n) { | |
745 | n->tc_verd = SET_TC_VERD(n->tc_verd, 0); | |
746 | n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd); | |
747 | n->tc_verd = CLR_TC_MUNGED(n->tc_verd); | |
12da81d1 JHS |
748 | } |
749 | return n; | |
750 | } | |
751 | #endif | |
752 | ||
292f1c7f | 753 | struct psched_ratecfg { |
130d3d68 | 754 | u64 rate_bytes_ps; /* bytes per second */ |
01cb71d2 ED |
755 | u32 mult; |
756 | u16 overhead; | |
8a8e3d84 | 757 | u8 linklayer; |
01cb71d2 | 758 | u8 shift; |
292f1c7f JP |
759 | }; |
760 | ||
761 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
762 | unsigned int len) | |
763 | { | |
8a8e3d84 JDB |
764 | len += r->overhead; |
765 | ||
766 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) | |
767 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
768 | ||
769 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
770 | } |
771 | ||
5c15257f | 772 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
3e1e3aae ED |
773 | const struct tc_ratespec *conf, |
774 | u64 rate64); | |
292f1c7f | 775 | |
01cb71d2 ED |
776 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
777 | const struct psched_ratecfg *r) | |
292f1c7f | 778 | { |
01cb71d2 | 779 | memset(res, 0, sizeof(*res)); |
3e1e3aae ED |
780 | |
781 | /* legacy struct tc_ratespec has a 32bit @rate field | |
782 | * Qdisc using 64bit rate should add new attributes | |
783 | * in order to maintain compatibility. | |
784 | */ | |
785 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); | |
786 | ||
01cb71d2 | 787 | res->overhead = r->overhead; |
8a8e3d84 | 788 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
789 | } |
790 | ||
1da177e4 | 791 | #endif |