Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __NET_SCHED_GENERIC_H |
3 | #define __NET_SCHED_GENERIC_H | |
4 | ||
1da177e4 LT |
5 | #include <linux/netdevice.h> |
6 | #include <linux/types.h> | |
7 | #include <linux/rcupdate.h> | |
1da177e4 LT |
8 | #include <linux/pkt_sched.h> |
9 | #include <linux/pkt_cls.h> | |
22e0f8b9 | 10 | #include <linux/percpu.h> |
5772e9a3 | 11 | #include <linux/dynamic_queue_limits.h> |
5bc17018 | 12 | #include <linux/list.h> |
7b936405 | 13 | #include <linux/refcount.h> |
7aa0045d | 14 | #include <linux/workqueue.h> |
1da177e4 | 15 | #include <net/gen_stats.h> |
be577ddc | 16 | #include <net/rtnetlink.h> |
1da177e4 LT |
17 | |
18 | struct Qdisc_ops; | |
19 | struct qdisc_walker; | |
20 | struct tcf_walker; | |
21 | struct module; | |
22 | ||
fd2c3ef7 | 23 | struct qdisc_rate_table { |
1da177e4 LT |
24 | struct tc_ratespec rate; |
25 | u32 data[256]; | |
26 | struct qdisc_rate_table *next; | |
27 | int refcnt; | |
28 | }; | |
29 | ||
fd2c3ef7 | 30 | enum qdisc_state_t { |
37437bb2 | 31 | __QDISC_STATE_SCHED, |
a9312ae8 | 32 | __QDISC_STATE_DEACTIVATED, |
e2627c8c DM |
33 | }; |
34 | ||
175f9c1b | 35 | struct qdisc_size_table { |
a2da570d | 36 | struct rcu_head rcu; |
175f9c1b JK |
37 | struct list_head list; |
38 | struct tc_sizespec szopts; | |
39 | int refcnt; | |
40 | u16 data[]; | |
41 | }; | |
42 | ||
48da34b7 FW |
43 | /* similar to sk_buff_head, but skb->prev pointer is undefined. */ |
44 | struct qdisc_skb_head { | |
45 | struct sk_buff *head; | |
46 | struct sk_buff *tail; | |
47 | __u32 qlen; | |
48 | spinlock_t lock; | |
49 | }; | |
50 | ||
fd2c3ef7 | 51 | struct Qdisc { |
520ac30f ED |
52 | int (*enqueue)(struct sk_buff *skb, |
53 | struct Qdisc *sch, | |
54 | struct sk_buff **to_free); | |
55 | struct sk_buff * (*dequeue)(struct Qdisc *sch); | |
05bdd2f1 | 56 | unsigned int flags; |
b00355db | 57 | #define TCQ_F_BUILTIN 1 |
fd245a4a ED |
58 | #define TCQ_F_INGRESS 2 |
59 | #define TCQ_F_CAN_BYPASS 4 | |
60 | #define TCQ_F_MQROOT 8 | |
1abbe139 ED |
61 | #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for |
62 | * q->dev_queue : It can test | |
63 | * netif_xmit_frozen_or_stopped() before | |
64 | * dequeueing next packet. | |
65 | * Its true for MQ/MQPRIO slaves, or non | |
66 | * multiqueue device. | |
67 | */ | |
b00355db | 68 | #define TCQ_F_WARN_NONWC (1 << 16) |
22e0f8b9 | 69 | #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */ |
4eaf3b84 ED |
70 | #define TCQ_F_NOPARENT 0x40 /* root of its hierarchy : |
71 | * qdisc_tree_decrease_qlen() should stop. | |
72 | */ | |
49b49971 | 73 | #define TCQ_F_INVISIBLE 0x80 /* invisible by default in dump */ |
6b3ba914 | 74 | #define TCQ_F_NOLOCK 0x100 /* qdisc does not require locking */ |
7a4fa291 | 75 | #define TCQ_F_OFFLOADED 0x200 /* qdisc is offloaded to HW */ |
45203a3b | 76 | u32 limit; |
05bdd2f1 | 77 | const struct Qdisc_ops *ops; |
a2da570d | 78 | struct qdisc_size_table __rcu *stab; |
59cc1f61 | 79 | struct hlist_node hash; |
1da177e4 LT |
80 | u32 handle; |
81 | u32 parent; | |
72b25a91 | 82 | |
5e140dfc | 83 | struct netdev_queue *dev_queue; |
5e140dfc | 84 | |
1c0d32fd | 85 | struct net_rate_estimator __rcu *rate_est; |
0d32ef8c ED |
86 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
87 | struct gnet_stats_queue __percpu *cpu_qstats; | |
88 | ||
5e140dfc ED |
89 | /* |
90 | * For performance sake on SMP, we put highly modified fields at the end | |
91 | */ | |
a53851e2 | 92 | struct sk_buff_head gso_skb ____cacheline_aligned_in_smp; |
48da34b7 | 93 | struct qdisc_skb_head q; |
0d32ef8c | 94 | struct gnet_stats_basic_packed bstats; |
f9eb8aea | 95 | seqcount_t running; |
0d32ef8c | 96 | struct gnet_stats_queue qstats; |
4d202a0d ED |
97 | unsigned long state; |
98 | struct Qdisc *next_sched; | |
70e57d5e | 99 | struct sk_buff_head skb_bad_txq; |
45203a3b | 100 | int padded; |
7b936405 | 101 | refcount_t refcnt; |
45203a3b ED |
102 | |
103 | spinlock_t busylock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
104 | }; |
105 | ||
551143d8 ED |
106 | static inline void qdisc_refcount_inc(struct Qdisc *qdisc) |
107 | { | |
108 | if (qdisc->flags & TCQ_F_BUILTIN) | |
109 | return; | |
110 | refcount_inc(&qdisc->refcnt); | |
111 | } | |
112 | ||
fd245a4a | 113 | static inline bool qdisc_is_running(const struct Qdisc *qdisc) |
bc135b23 | 114 | { |
f9eb8aea | 115 | return (raw_read_seqcount(&qdisc->running) & 1) ? true : false; |
bc135b23 ED |
116 | } |
117 | ||
118 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) | |
119 | { | |
fd245a4a ED |
120 | if (qdisc_is_running(qdisc)) |
121 | return false; | |
52fbb290 ED |
122 | /* Variant of write_seqcount_begin() telling lockdep a trylock |
123 | * was attempted. | |
124 | */ | |
125 | raw_write_seqcount_begin(&qdisc->running); | |
126 | seqcount_acquire(&qdisc->running.dep_map, 0, 1, _RET_IP_); | |
fd245a4a | 127 | return true; |
bc135b23 ED |
128 | } |
129 | ||
130 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
131 | { | |
f9eb8aea | 132 | write_seqcount_end(&qdisc->running); |
fd245a4a ED |
133 | } |
134 | ||
5772e9a3 JDB |
135 | static inline bool qdisc_may_bulk(const struct Qdisc *qdisc) |
136 | { | |
137 | return qdisc->flags & TCQ_F_ONETXQUEUE; | |
138 | } | |
139 | ||
140 | static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq) | |
141 | { | |
142 | #ifdef CONFIG_BQL | |
143 | /* Non-BQL migrated drivers will return 0, too. */ | |
144 | return dql_avail(&txq->dql); | |
145 | #else | |
146 | return 0; | |
147 | #endif | |
148 | } | |
149 | ||
fd2c3ef7 | 150 | struct Qdisc_class_ops { |
1da177e4 | 151 | /* Child qdisc manipulation */ |
926e61b7 | 152 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 | 153 | int (*graft)(struct Qdisc *, unsigned long cl, |
653d6fd6 AA |
154 | struct Qdisc *, struct Qdisc **, |
155 | struct netlink_ext_ack *extack); | |
1da177e4 | 156 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); |
43effa1e | 157 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
158 | |
159 | /* Class manipulation routines */ | |
143976ce | 160 | unsigned long (*find)(struct Qdisc *, u32 classid); |
1da177e4 | 161 | int (*change)(struct Qdisc *, u32, u32, |
793d81d6 AA |
162 | struct nlattr **, unsigned long *, |
163 | struct netlink_ext_ack *); | |
1da177e4 LT |
164 | int (*delete)(struct Qdisc *, unsigned long); |
165 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
166 | ||
167 | /* Filter manipulation */ | |
0ac4bd68 | 168 | struct tcf_block * (*tcf_block)(struct Qdisc *sch, |
cbaacc4e AA |
169 | unsigned long arg, |
170 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
171 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
172 | u32 classid); | |
173 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
174 | ||
175 | /* rtnetlink specific */ | |
176 | int (*dump)(struct Qdisc *, unsigned long, | |
177 | struct sk_buff *skb, struct tcmsg*); | |
178 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
179 | struct gnet_dump *); | |
180 | }; | |
181 | ||
fd2c3ef7 | 182 | struct Qdisc_ops { |
1da177e4 | 183 | struct Qdisc_ops *next; |
20fea08b | 184 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
185 | char id[IFNAMSIZ]; |
186 | int priv_size; | |
d59f5ffa | 187 | unsigned int static_flags; |
1da177e4 | 188 | |
520ac30f ED |
189 | int (*enqueue)(struct sk_buff *skb, |
190 | struct Qdisc *sch, | |
191 | struct sk_buff **to_free); | |
1da177e4 | 192 | struct sk_buff * (*dequeue)(struct Qdisc *); |
90d841fd | 193 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 | 194 | |
e63d7dfd AA |
195 | int (*init)(struct Qdisc *sch, struct nlattr *arg, |
196 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
197 | void (*reset)(struct Qdisc *); |
198 | void (*destroy)(struct Qdisc *); | |
0ac4bd68 | 199 | int (*change)(struct Qdisc *sch, |
2030721c AA |
200 | struct nlattr *arg, |
201 | struct netlink_ext_ack *extack); | |
0ac4bd68 | 202 | void (*attach)(struct Qdisc *sch); |
1da177e4 LT |
203 | |
204 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
205 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
206 | ||
207 | struct module *owner; | |
208 | }; | |
209 | ||
210 | ||
fd2c3ef7 | 211 | struct tcf_result { |
db50514f JP |
212 | union { |
213 | struct { | |
214 | unsigned long class; | |
215 | u32 classid; | |
216 | }; | |
217 | const struct tcf_proto *goto_tp; | |
218 | }; | |
1da177e4 LT |
219 | }; |
220 | ||
fd2c3ef7 | 221 | struct tcf_proto_ops { |
36272874 | 222 | struct list_head head; |
1da177e4 LT |
223 | char kind[IFNAMSIZ]; |
224 | ||
dc7f9f6e ED |
225 | int (*classify)(struct sk_buff *, |
226 | const struct tcf_proto *, | |
227 | struct tcf_result *); | |
1da177e4 | 228 | int (*init)(struct tcf_proto*); |
763dbf63 | 229 | void (*destroy)(struct tcf_proto*); |
1da177e4 | 230 | |
8113c095 | 231 | void* (*get)(struct tcf_proto*, u32 handle); |
c1b52739 | 232 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 233 | struct tcf_proto*, unsigned long, |
add93b61 | 234 | u32 handle, struct nlattr **, |
8113c095 WC |
235 | void **, bool); |
236 | int (*delete)(struct tcf_proto*, void *, bool*); | |
1da177e4 | 237 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); |
07d79fc7 | 238 | void (*bind_class)(void *, u32, unsigned long); |
1da177e4 LT |
239 | |
240 | /* rtnetlink specific */ | |
8113c095 | 241 | int (*dump)(struct net*, struct tcf_proto*, void *, |
1da177e4 LT |
242 | struct sk_buff *skb, struct tcmsg*); |
243 | ||
244 | struct module *owner; | |
245 | }; | |
246 | ||
fd2c3ef7 | 247 | struct tcf_proto { |
1da177e4 | 248 | /* Fast access part */ |
25d8c0d5 JF |
249 | struct tcf_proto __rcu *next; |
250 | void __rcu *root; | |
dc7f9f6e ED |
251 | int (*classify)(struct sk_buff *, |
252 | const struct tcf_proto *, | |
253 | struct tcf_result *); | |
66c6f529 | 254 | __be16 protocol; |
1da177e4 LT |
255 | |
256 | /* All the rest */ | |
257 | u32 prio; | |
1da177e4 | 258 | void *data; |
dc7f9f6e | 259 | const struct tcf_proto_ops *ops; |
5bc17018 | 260 | struct tcf_chain *chain; |
25d8c0d5 | 261 | struct rcu_head rcu; |
1da177e4 LT |
262 | }; |
263 | ||
175f9c1b JK |
264 | struct qdisc_skb_cb { |
265 | unsigned int pkt_len; | |
df4ab5b3 | 266 | u16 slave_dev_queue_mapping; |
045efa82 | 267 | u16 tc_classid; |
25711786 ED |
268 | #define QDISC_CB_PRIV_LEN 20 |
269 | unsigned char data[QDISC_CB_PRIV_LEN]; | |
175f9c1b JK |
270 | }; |
271 | ||
c7eb7d72 JP |
272 | typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv); |
273 | ||
2190d1d0 JP |
274 | struct tcf_chain { |
275 | struct tcf_proto __rcu *filter_chain; | |
a9b19443 | 276 | struct list_head filter_chain_list; |
5bc17018 JP |
277 | struct list_head list; |
278 | struct tcf_block *block; | |
279 | u32 index; /* chain index */ | |
280 | unsigned int refcnt; | |
6529eaba JP |
281 | }; |
282 | ||
2190d1d0 | 283 | struct tcf_block { |
5bc17018 | 284 | struct list_head chain_list; |
48617387 JP |
285 | u32 index; /* block index for shared blocks */ |
286 | unsigned int refcnt; | |
855319be | 287 | struct net *net; |
69d78ef2 | 288 | struct Qdisc *q; |
acb67442 | 289 | struct list_head cb_list; |
f36fe1c4 JP |
290 | struct list_head owner_list; |
291 | bool keep_dst; | |
2190d1d0 JP |
292 | }; |
293 | ||
16bda13d DM |
294 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
295 | { | |
296 | struct qdisc_skb_cb *qcb; | |
5ee31c68 ED |
297 | |
298 | BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); | |
16bda13d DM |
299 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
300 | } | |
301 | ||
7e66016f JF |
302 | static inline int qdisc_qlen_cpu(const struct Qdisc *q) |
303 | { | |
304 | return this_cpu_ptr(q->cpu_qstats)->qlen; | |
305 | } | |
306 | ||
05bdd2f1 | 307 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
308 | { |
309 | return q->q.qlen; | |
310 | } | |
311 | ||
7e66016f JF |
312 | static inline int qdisc_qlen_sum(const struct Qdisc *q) |
313 | { | |
314 | __u32 qlen = 0; | |
315 | int i; | |
316 | ||
317 | if (q->flags & TCQ_F_NOLOCK) { | |
318 | for_each_possible_cpu(i) | |
319 | qlen += per_cpu_ptr(q->cpu_qstats, i)->qlen; | |
320 | } else { | |
321 | qlen = q->q.qlen; | |
322 | } | |
323 | ||
324 | return qlen; | |
325 | } | |
326 | ||
bfe0d029 | 327 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
328 | { |
329 | return (struct qdisc_skb_cb *)skb->cb; | |
330 | } | |
331 | ||
83874000 DM |
332 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
333 | { | |
334 | return &qdisc->q.lock; | |
335 | } | |
336 | ||
05bdd2f1 | 337 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc | 338 | { |
46e5da40 JF |
339 | struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc); |
340 | ||
341 | return q; | |
7698b4fc DM |
342 | } |
343 | ||
05bdd2f1 | 344 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
345 | { |
346 | return qdisc->dev_queue->qdisc_sleeping; | |
347 | } | |
348 | ||
7e43f112 DM |
349 | /* The qdisc root lock is a mechanism by which to top level |
350 | * of a qdisc tree can be locked from any qdisc node in the | |
351 | * forest. This allows changing the configuration of some | |
352 | * aspect of the qdisc tree while blocking out asynchronous | |
353 | * qdisc access in the packet processing paths. | |
354 | * | |
355 | * It is only legal to do this when the root will not change | |
356 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
357 | * root. This is enforced by holding the RTNL semaphore, which | |
358 | * all users of this lock accessor must do. | |
359 | */ | |
05bdd2f1 | 360 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
361 | { |
362 | struct Qdisc *root = qdisc_root(qdisc); | |
363 | ||
7e43f112 | 364 | ASSERT_RTNL(); |
83874000 | 365 | return qdisc_lock(root); |
7698b4fc DM |
366 | } |
367 | ||
05bdd2f1 | 368 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
369 | { |
370 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
371 | ||
372 | ASSERT_RTNL(); | |
373 | return qdisc_lock(root); | |
374 | } | |
375 | ||
edb09eb1 ED |
376 | static inline seqcount_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc) |
377 | { | |
378 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
379 | ||
380 | ASSERT_RTNL(); | |
381 | return &root->running; | |
382 | } | |
383 | ||
05bdd2f1 | 384 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
385 | { |
386 | return qdisc->dev_queue->dev; | |
387 | } | |
1da177e4 | 388 | |
05bdd2f1 | 389 | static inline void sch_tree_lock(const struct Qdisc *q) |
78a5b30b | 390 | { |
fe439dd0 | 391 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
392 | } |
393 | ||
05bdd2f1 | 394 | static inline void sch_tree_unlock(const struct Qdisc *q) |
78a5b30b | 395 | { |
fe439dd0 | 396 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
397 | } |
398 | ||
e41a33e6 TG |
399 | extern struct Qdisc noop_qdisc; |
400 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
401 | extern struct Qdisc_ops pfifo_fast_ops; |
402 | extern struct Qdisc_ops mq_qdisc_ops; | |
d66d6c31 | 403 | extern struct Qdisc_ops noqueue_qdisc_ops; |
6da7c8fc | 404 | extern const struct Qdisc_ops *default_qdisc_ops; |
1f27cde3 ED |
405 | static inline const struct Qdisc_ops * |
406 | get_default_qdisc_ops(const struct net_device *dev, int ntx) | |
407 | { | |
408 | return ntx < dev->real_num_tx_queues ? | |
409 | default_qdisc_ops : &pfifo_fast_ops; | |
410 | } | |
e41a33e6 | 411 | |
fd2c3ef7 | 412 | struct Qdisc_class_common { |
6fe1c7a5 PM |
413 | u32 classid; |
414 | struct hlist_node hnode; | |
415 | }; | |
416 | ||
fd2c3ef7 | 417 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
418 | struct hlist_head *hash; |
419 | unsigned int hashsize; | |
420 | unsigned int hashmask; | |
421 | unsigned int hashelems; | |
422 | }; | |
423 | ||
424 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
425 | { | |
426 | id ^= id >> 8; | |
427 | id ^= id >> 4; | |
428 | return id & mask; | |
429 | } | |
430 | ||
431 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 432 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
433 | { |
434 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
435 | unsigned int h; |
436 | ||
7d3f0cd4 GF |
437 | if (!id) |
438 | return NULL; | |
439 | ||
6fe1c7a5 | 440 | h = qdisc_class_hash(id, hash->hashmask); |
b67bfe0d | 441 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
442 | if (cl->classid == id) |
443 | return cl; | |
444 | } | |
445 | return NULL; | |
446 | } | |
447 | ||
384c181e AN |
448 | static inline int tc_classid_to_hwtc(struct net_device *dev, u32 classid) |
449 | { | |
450 | u32 hwtc = TC_H_MIN(classid) - TC_H_MIN_PRIORITY; | |
451 | ||
452 | return (hwtc < netdev_get_num_tc(dev)) ? hwtc : -EINVAL; | |
453 | } | |
454 | ||
5c15257f JP |
455 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
456 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, | |
457 | struct Qdisc_class_common *); | |
458 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, | |
459 | struct Qdisc_class_common *); | |
460 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
461 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
462 | ||
463 | void dev_init_scheduler(struct net_device *dev); | |
464 | void dev_shutdown(struct net_device *dev); | |
465 | void dev_activate(struct net_device *dev); | |
466 | void dev_deactivate(struct net_device *dev); | |
467 | void dev_deactivate_many(struct list_head *head); | |
468 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, | |
469 | struct Qdisc *qdisc); | |
470 | void qdisc_reset(struct Qdisc *qdisc); | |
471 | void qdisc_destroy(struct Qdisc *qdisc); | |
2ccccf5f WC |
472 | void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n, |
473 | unsigned int len); | |
5c15257f | 474 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
d0bd684d AA |
475 | const struct Qdisc_ops *ops, |
476 | struct netlink_ext_ack *extack); | |
81d947e2 | 477 | void qdisc_free(struct Qdisc *qdisc); |
5c15257f | 478 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
a38a9882 AA |
479 | const struct Qdisc_ops *ops, u32 parentid, |
480 | struct netlink_ext_ack *extack); | |
5c15257f JP |
481 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
482 | const struct qdisc_size_table *stab); | |
27b29f63 | 483 | int skb_do_redirect(struct sk_buff *); |
1da177e4 | 484 | |
a5135bcf WB |
485 | static inline void skb_reset_tc(struct sk_buff *skb) |
486 | { | |
487 | #ifdef CONFIG_NET_CLS_ACT | |
bc31c905 | 488 | skb->tc_redirected = 0; |
a5135bcf WB |
489 | #endif |
490 | } | |
491 | ||
fdc5432a DB |
492 | static inline bool skb_at_tc_ingress(const struct sk_buff *skb) |
493 | { | |
494 | #ifdef CONFIG_NET_CLS_ACT | |
8dc07fdb | 495 | return skb->tc_at_ingress; |
fdc5432a DB |
496 | #else |
497 | return false; | |
498 | #endif | |
499 | } | |
500 | ||
e7246e12 WB |
501 | static inline bool skb_skip_tc_classify(struct sk_buff *skb) |
502 | { | |
503 | #ifdef CONFIG_NET_CLS_ACT | |
504 | if (skb->tc_skip_classify) { | |
505 | skb->tc_skip_classify = 0; | |
506 | return true; | |
507 | } | |
508 | #endif | |
509 | return false; | |
510 | } | |
511 | ||
f0796d5c JF |
512 | /* Reset all TX qdiscs greater then index of a device. */ |
513 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) | |
5aa70995 | 514 | { |
4ef6acff JF |
515 | struct Qdisc *qdisc; |
516 | ||
f0796d5c | 517 | for (; i < dev->num_tx_queues; i++) { |
46e5da40 | 518 | qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc); |
4ef6acff JF |
519 | if (qdisc) { |
520 | spin_lock_bh(qdisc_lock(qdisc)); | |
521 | qdisc_reset(qdisc); | |
522 | spin_unlock_bh(qdisc_lock(qdisc)); | |
523 | } | |
524 | } | |
5aa70995 DM |
525 | } |
526 | ||
5aa70995 DM |
527 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
528 | { | |
f0796d5c | 529 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
530 | } |
531 | ||
3e745dd6 DM |
532 | /* Are all TX queues of the device empty? */ |
533 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
534 | { | |
e8a0464c | 535 | unsigned int i; |
46e5da40 JF |
536 | |
537 | rcu_read_lock(); | |
e8a0464c DM |
538 | for (i = 0; i < dev->num_tx_queues; i++) { |
539 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 540 | const struct Qdisc *q = rcu_dereference(txq->qdisc); |
3e745dd6 | 541 | |
46e5da40 JF |
542 | if (q->q.qlen) { |
543 | rcu_read_unlock(); | |
e8a0464c | 544 | return false; |
46e5da40 | 545 | } |
e8a0464c | 546 | } |
46e5da40 | 547 | rcu_read_unlock(); |
e8a0464c | 548 | return true; |
3e745dd6 DM |
549 | } |
550 | ||
6fa9864b | 551 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 552 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 553 | { |
e8a0464c | 554 | unsigned int i; |
46e5da40 | 555 | |
e8a0464c DM |
556 | for (i = 0; i < dev->num_tx_queues; i++) { |
557 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 558 | if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping) |
e8a0464c DM |
559 | return true; |
560 | } | |
561 | return false; | |
6fa9864b DM |
562 | } |
563 | ||
e8a0464c | 564 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
565 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
566 | { | |
e8a0464c | 567 | unsigned int i; |
46e5da40 | 568 | |
e8a0464c DM |
569 | for (i = 0; i < dev->num_tx_queues; i++) { |
570 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 571 | if (rcu_access_pointer(txq->qdisc) != &noop_qdisc) |
e8a0464c DM |
572 | return false; |
573 | } | |
574 | return true; | |
05297949 DM |
575 | } |
576 | ||
bfe0d029 | 577 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 578 | { |
175f9c1b | 579 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
580 | } |
581 | ||
c27f339a | 582 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
583 | enum net_xmit_qdisc_t { |
584 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 585 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
586 | }; |
587 | ||
c27f339a | 588 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 589 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
590 | #else |
591 | #define net_xmit_drop_count(e) (1) | |
592 | #endif | |
593 | ||
a2da570d ED |
594 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
595 | const struct Qdisc *sch) | |
5f86173b | 596 | { |
3a682fbd | 597 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
598 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
599 | ||
600 | if (stab) | |
601 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 602 | #endif |
a2da570d ED |
603 | } |
604 | ||
520ac30f ED |
605 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
606 | struct sk_buff **to_free) | |
a2da570d ED |
607 | { |
608 | qdisc_calculate_pkt_len(skb, sch); | |
520ac30f | 609 | return sch->enqueue(skb, sch, to_free); |
5f86173b JK |
610 | } |
611 | ||
22e0f8b9 JF |
612 | static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) |
613 | { | |
614 | return q->flags & TCQ_F_CPUSTATS; | |
615 | } | |
bfe0d029 | 616 | |
38040702 AV |
617 | static inline void _bstats_update(struct gnet_stats_basic_packed *bstats, |
618 | __u64 bytes, __u32 packets) | |
619 | { | |
620 | bstats->bytes += bytes; | |
621 | bstats->packets += packets; | |
622 | } | |
623 | ||
bfe0d029 ED |
624 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, |
625 | const struct sk_buff *skb) | |
626 | { | |
38040702 AV |
627 | _bstats_update(bstats, |
628 | qdisc_pkt_len(skb), | |
629 | skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1); | |
630 | } | |
631 | ||
632 | static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, | |
633 | __u64 bytes, __u32 packets) | |
634 | { | |
635 | u64_stats_update_begin(&bstats->syncp); | |
636 | _bstats_update(&bstats->bstats, bytes, packets); | |
637 | u64_stats_update_end(&bstats->syncp); | |
bfe0d029 ED |
638 | } |
639 | ||
24ea591d ED |
640 | static inline void bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, |
641 | const struct sk_buff *skb) | |
22e0f8b9 | 642 | { |
22e0f8b9 JF |
643 | u64_stats_update_begin(&bstats->syncp); |
644 | bstats_update(&bstats->bstats, skb); | |
645 | u64_stats_update_end(&bstats->syncp); | |
646 | } | |
647 | ||
24ea591d ED |
648 | static inline void qdisc_bstats_cpu_update(struct Qdisc *sch, |
649 | const struct sk_buff *skb) | |
650 | { | |
651 | bstats_cpu_update(this_cpu_ptr(sch->cpu_bstats), skb); | |
652 | } | |
653 | ||
bfe0d029 ED |
654 | static inline void qdisc_bstats_update(struct Qdisc *sch, |
655 | const struct sk_buff *skb) | |
bbd8a0d3 | 656 | { |
bfe0d029 | 657 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
658 | } |
659 | ||
25331d6c JF |
660 | static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch, |
661 | const struct sk_buff *skb) | |
662 | { | |
663 | sch->qstats.backlog -= qdisc_pkt_len(skb); | |
664 | } | |
665 | ||
40bd0362 JF |
666 | static inline void qdisc_qstats_cpu_backlog_dec(struct Qdisc *sch, |
667 | const struct sk_buff *skb) | |
668 | { | |
669 | this_cpu_sub(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
670 | } | |
671 | ||
25331d6c JF |
672 | static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch, |
673 | const struct sk_buff *skb) | |
674 | { | |
675 | sch->qstats.backlog += qdisc_pkt_len(skb); | |
676 | } | |
677 | ||
40bd0362 JF |
678 | static inline void qdisc_qstats_cpu_backlog_inc(struct Qdisc *sch, |
679 | const struct sk_buff *skb) | |
680 | { | |
681 | this_cpu_add(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
682 | } | |
683 | ||
684 | static inline void qdisc_qstats_cpu_qlen_inc(struct Qdisc *sch) | |
685 | { | |
686 | this_cpu_inc(sch->cpu_qstats->qlen); | |
687 | } | |
688 | ||
689 | static inline void qdisc_qstats_cpu_qlen_dec(struct Qdisc *sch) | |
690 | { | |
691 | this_cpu_dec(sch->cpu_qstats->qlen); | |
692 | } | |
693 | ||
694 | static inline void qdisc_qstats_cpu_requeues_inc(struct Qdisc *sch) | |
695 | { | |
696 | this_cpu_inc(sch->cpu_qstats->requeues); | |
697 | } | |
698 | ||
25331d6c JF |
699 | static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count) |
700 | { | |
701 | sch->qstats.drops += count; | |
702 | } | |
703 | ||
24ea591d | 704 | static inline void qstats_drop_inc(struct gnet_stats_queue *qstats) |
25331d6c | 705 | { |
24ea591d | 706 | qstats->drops++; |
25331d6c JF |
707 | } |
708 | ||
24ea591d | 709 | static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats) |
b0ab6f92 | 710 | { |
24ea591d ED |
711 | qstats->overlimits++; |
712 | } | |
b0ab6f92 | 713 | |
24ea591d ED |
714 | static inline void qdisc_qstats_drop(struct Qdisc *sch) |
715 | { | |
716 | qstats_drop_inc(&sch->qstats); | |
717 | } | |
718 | ||
719 | static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch) | |
720 | { | |
eb60a8dd | 721 | this_cpu_inc(sch->cpu_qstats->drops); |
b0ab6f92 JF |
722 | } |
723 | ||
25331d6c JF |
724 | static inline void qdisc_qstats_overlimit(struct Qdisc *sch) |
725 | { | |
726 | sch->qstats.overlimits++; | |
727 | } | |
728 | ||
48da34b7 FW |
729 | static inline void qdisc_skb_head_init(struct qdisc_skb_head *qh) |
730 | { | |
731 | qh->head = NULL; | |
732 | qh->tail = NULL; | |
733 | qh->qlen = 0; | |
734 | } | |
735 | ||
9972b25d | 736 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
48da34b7 | 737 | struct qdisc_skb_head *qh) |
9972b25d | 738 | { |
48da34b7 FW |
739 | struct sk_buff *last = qh->tail; |
740 | ||
741 | if (last) { | |
742 | skb->next = NULL; | |
743 | last->next = skb; | |
744 | qh->tail = skb; | |
745 | } else { | |
746 | qh->tail = skb; | |
747 | qh->head = skb; | |
748 | } | |
749 | qh->qlen++; | |
25331d6c | 750 | qdisc_qstats_backlog_inc(sch, skb); |
9972b25d TG |
751 | |
752 | return NET_XMIT_SUCCESS; | |
753 | } | |
754 | ||
755 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
756 | { | |
757 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
758 | } | |
759 | ||
48da34b7 | 760 | static inline struct sk_buff *__qdisc_dequeue_head(struct qdisc_skb_head *qh) |
9972b25d | 761 | { |
48da34b7 FW |
762 | struct sk_buff *skb = qh->head; |
763 | ||
764 | if (likely(skb != NULL)) { | |
765 | qh->head = skb->next; | |
766 | qh->qlen--; | |
767 | if (qh->head == NULL) | |
768 | qh->tail = NULL; | |
769 | skb->next = NULL; | |
770 | } | |
9972b25d | 771 | |
ec323368 FW |
772 | return skb; |
773 | } | |
774 | ||
775 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
776 | { | |
777 | struct sk_buff *skb = __qdisc_dequeue_head(&sch->q); | |
778 | ||
9190b3b3 | 779 | if (likely(skb != NULL)) { |
25331d6c | 780 | qdisc_qstats_backlog_dec(sch, skb); |
9190b3b3 ED |
781 | qdisc_bstats_update(sch, skb); |
782 | } | |
9972b25d TG |
783 | |
784 | return skb; | |
785 | } | |
786 | ||
520ac30f ED |
787 | /* Instead of calling kfree_skb() while root qdisc lock is held, |
788 | * queue the skb for future freeing at end of __dev_xmit_skb() | |
789 | */ | |
790 | static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free) | |
791 | { | |
792 | skb->next = *to_free; | |
793 | *to_free = skb; | |
794 | } | |
795 | ||
57dbb2d8 | 796 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, |
48da34b7 | 797 | struct qdisc_skb_head *qh, |
520ac30f | 798 | struct sk_buff **to_free) |
57dbb2d8 | 799 | { |
48da34b7 | 800 | struct sk_buff *skb = __qdisc_dequeue_head(qh); |
57dbb2d8 HPP |
801 | |
802 | if (likely(skb != NULL)) { | |
803 | unsigned int len = qdisc_pkt_len(skb); | |
520ac30f | 804 | |
25331d6c | 805 | qdisc_qstats_backlog_dec(sch, skb); |
520ac30f | 806 | __qdisc_drop(skb, to_free); |
57dbb2d8 HPP |
807 | return len; |
808 | } | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
520ac30f ED |
813 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch, |
814 | struct sk_buff **to_free) | |
57dbb2d8 | 815 | { |
520ac30f | 816 | return __qdisc_queue_drop_head(sch, &sch->q, to_free); |
9972b25d TG |
817 | } |
818 | ||
48a8f519 PM |
819 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
820 | { | |
48da34b7 FW |
821 | const struct qdisc_skb_head *qh = &sch->q; |
822 | ||
823 | return qh->head; | |
48a8f519 PM |
824 | } |
825 | ||
77be155c JP |
826 | /* generic pseudo peek method for non-work-conserving qdisc */ |
827 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
828 | { | |
a53851e2 JF |
829 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
830 | ||
77be155c | 831 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ |
a53851e2 JF |
832 | if (!skb) { |
833 | skb = sch->dequeue(sch); | |
834 | ||
835 | if (skb) { | |
836 | __skb_queue_head(&sch->gso_skb, skb); | |
61c9eaf9 | 837 | /* it's still part of the queue */ |
a53851e2 | 838 | qdisc_qstats_backlog_inc(sch, skb); |
61c9eaf9 | 839 | sch->q.qlen++; |
a27758ff | 840 | } |
61c9eaf9 | 841 | } |
77be155c | 842 | |
a53851e2 | 843 | return skb; |
77be155c JP |
844 | } |
845 | ||
846 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
847 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
848 | { | |
a53851e2 | 849 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
77be155c | 850 | |
61c9eaf9 | 851 | if (skb) { |
a53851e2 | 852 | skb = __skb_dequeue(&sch->gso_skb); |
a27758ff | 853 | qdisc_qstats_backlog_dec(sch, skb); |
61c9eaf9 JP |
854 | sch->q.qlen--; |
855 | } else { | |
77be155c | 856 | skb = sch->dequeue(sch); |
61c9eaf9 | 857 | } |
77be155c JP |
858 | |
859 | return skb; | |
860 | } | |
861 | ||
48da34b7 | 862 | static inline void __qdisc_reset_queue(struct qdisc_skb_head *qh) |
9972b25d TG |
863 | { |
864 | /* | |
865 | * We do not know the backlog in bytes of this list, it | |
866 | * is up to the caller to correct it | |
867 | */ | |
48da34b7 FW |
868 | ASSERT_RTNL(); |
869 | if (qh->qlen) { | |
870 | rtnl_kfree_skbs(qh->head, qh->tail); | |
871 | ||
872 | qh->head = NULL; | |
873 | qh->tail = NULL; | |
874 | qh->qlen = 0; | |
1b5c5493 | 875 | } |
9972b25d TG |
876 | } |
877 | ||
878 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
879 | { | |
1b5c5493 | 880 | __qdisc_reset_queue(&sch->q); |
9972b25d TG |
881 | sch->qstats.backlog = 0; |
882 | } | |
883 | ||
86a7996c WC |
884 | static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, |
885 | struct Qdisc **pold) | |
886 | { | |
887 | struct Qdisc *old; | |
888 | ||
889 | sch_tree_lock(sch); | |
890 | old = *pold; | |
891 | *pold = new; | |
892 | if (old != NULL) { | |
68a66d14 KK |
893 | unsigned int qlen = old->q.qlen; |
894 | unsigned int backlog = old->qstats.backlog; | |
895 | ||
86a7996c | 896 | qdisc_reset(old); |
68a66d14 | 897 | qdisc_tree_reduce_backlog(old, qlen, backlog); |
86a7996c WC |
898 | } |
899 | sch_tree_unlock(sch); | |
900 | ||
901 | return old; | |
902 | } | |
903 | ||
1b5c5493 ED |
904 | static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) |
905 | { | |
906 | rtnl_kfree_skbs(skb, skb); | |
907 | qdisc_qstats_drop(sch); | |
908 | } | |
909 | ||
40bd0362 JF |
910 | static inline int qdisc_drop_cpu(struct sk_buff *skb, struct Qdisc *sch, |
911 | struct sk_buff **to_free) | |
912 | { | |
913 | __qdisc_drop(skb, to_free); | |
914 | qdisc_qstats_cpu_drop(sch); | |
915 | ||
916 | return NET_XMIT_DROP; | |
917 | } | |
520ac30f ED |
918 | |
919 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch, | |
920 | struct sk_buff **to_free) | |
9972b25d | 921 | { |
520ac30f | 922 | __qdisc_drop(skb, to_free); |
25331d6c | 923 | qdisc_qstats_drop(sch); |
9972b25d TG |
924 | |
925 | return NET_XMIT_DROP; | |
926 | } | |
927 | ||
e9bef55d JDB |
928 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
929 | long it will take to send a packet given its size. | |
930 | */ | |
931 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
932 | { | |
e08b0998 JDB |
933 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
934 | if (slot < 0) | |
935 | slot = 0; | |
e9bef55d JDB |
936 | slot >>= rtab->rate.cell_log; |
937 | if (slot > 255) | |
a02cec21 | 938 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
939 | return rtab->data[slot]; |
940 | } | |
941 | ||
292f1c7f | 942 | struct psched_ratecfg { |
130d3d68 | 943 | u64 rate_bytes_ps; /* bytes per second */ |
01cb71d2 ED |
944 | u32 mult; |
945 | u16 overhead; | |
8a8e3d84 | 946 | u8 linklayer; |
01cb71d2 | 947 | u8 shift; |
292f1c7f JP |
948 | }; |
949 | ||
950 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
951 | unsigned int len) | |
952 | { | |
8a8e3d84 JDB |
953 | len += r->overhead; |
954 | ||
955 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) | |
956 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
957 | ||
958 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
959 | } |
960 | ||
5c15257f | 961 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
3e1e3aae ED |
962 | const struct tc_ratespec *conf, |
963 | u64 rate64); | |
292f1c7f | 964 | |
01cb71d2 ED |
965 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
966 | const struct psched_ratecfg *r) | |
292f1c7f | 967 | { |
01cb71d2 | 968 | memset(res, 0, sizeof(*res)); |
3e1e3aae ED |
969 | |
970 | /* legacy struct tc_ratespec has a 32bit @rate field | |
971 | * Qdisc using 64bit rate should add new attributes | |
972 | * in order to maintain compatibility. | |
973 | */ | |
974 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); | |
975 | ||
01cb71d2 | 976 | res->overhead = r->overhead; |
8a8e3d84 | 977 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
978 | } |
979 | ||
46209401 JP |
980 | /* Mini Qdisc serves for specific needs of ingress/clsact Qdisc. |
981 | * The fast path only needs to access filter list and to update stats | |
982 | */ | |
983 | struct mini_Qdisc { | |
984 | struct tcf_proto *filter_list; | |
985 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; | |
986 | struct gnet_stats_queue __percpu *cpu_qstats; | |
987 | struct rcu_head rcu; | |
988 | }; | |
989 | ||
990 | static inline void mini_qdisc_bstats_cpu_update(struct mini_Qdisc *miniq, | |
991 | const struct sk_buff *skb) | |
992 | { | |
993 | bstats_cpu_update(this_cpu_ptr(miniq->cpu_bstats), skb); | |
994 | } | |
995 | ||
996 | static inline void mini_qdisc_qstats_cpu_drop(struct mini_Qdisc *miniq) | |
997 | { | |
998 | this_cpu_inc(miniq->cpu_qstats->drops); | |
999 | } | |
1000 | ||
1001 | struct mini_Qdisc_pair { | |
1002 | struct mini_Qdisc miniq1; | |
1003 | struct mini_Qdisc miniq2; | |
1004 | struct mini_Qdisc __rcu **p_miniq; | |
1005 | }; | |
1006 | ||
1007 | void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp, | |
1008 | struct tcf_proto *tp_head); | |
1009 | void mini_qdisc_pair_init(struct mini_Qdisc_pair *miniqp, struct Qdisc *qdisc, | |
1010 | struct mini_Qdisc __rcu **p_miniq); | |
1011 | ||
1da177e4 | 1012 | #endif |