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