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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> |
c266f64d | 15 | #include <linux/mutex.h> |
1da177e4 | 16 | #include <net/gen_stats.h> |
be577ddc | 17 | #include <net/rtnetlink.h> |
1da177e4 LT |
18 | |
19 | struct Qdisc_ops; | |
20 | struct qdisc_walker; | |
21 | struct tcf_walker; | |
22 | struct module; | |
d58e468b | 23 | struct bpf_flow_keys; |
1da177e4 | 24 | |
e56185c7 JH |
25 | typedef int tc_setup_cb_t(enum tc_setup_type type, |
26 | void *type_data, void *cb_priv); | |
27 | ||
7f76fa36 JH |
28 | typedef int tc_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv, |
29 | enum tc_setup_type type, void *type_data); | |
30 | ||
fd2c3ef7 | 31 | struct qdisc_rate_table { |
1da177e4 LT |
32 | struct tc_ratespec rate; |
33 | u32 data[256]; | |
34 | struct qdisc_rate_table *next; | |
35 | int refcnt; | |
36 | }; | |
37 | ||
fd2c3ef7 | 38 | enum qdisc_state_t { |
37437bb2 | 39 | __QDISC_STATE_SCHED, |
a9312ae8 | 40 | __QDISC_STATE_DEACTIVATED, |
e2627c8c DM |
41 | }; |
42 | ||
175f9c1b | 43 | struct qdisc_size_table { |
a2da570d | 44 | struct rcu_head rcu; |
175f9c1b JK |
45 | struct list_head list; |
46 | struct tc_sizespec szopts; | |
47 | int refcnt; | |
48 | u16 data[]; | |
49 | }; | |
50 | ||
48da34b7 FW |
51 | /* similar to sk_buff_head, but skb->prev pointer is undefined. */ |
52 | struct qdisc_skb_head { | |
53 | struct sk_buff *head; | |
54 | struct sk_buff *tail; | |
73eb628d | 55 | __u32 qlen; |
48da34b7 FW |
56 | spinlock_t lock; |
57 | }; | |
58 | ||
fd2c3ef7 | 59 | struct Qdisc { |
520ac30f ED |
60 | int (*enqueue)(struct sk_buff *skb, |
61 | struct Qdisc *sch, | |
62 | struct sk_buff **to_free); | |
63 | struct sk_buff * (*dequeue)(struct Qdisc *sch); | |
05bdd2f1 | 64 | unsigned int flags; |
b00355db | 65 | #define TCQ_F_BUILTIN 1 |
fd245a4a ED |
66 | #define TCQ_F_INGRESS 2 |
67 | #define TCQ_F_CAN_BYPASS 4 | |
68 | #define TCQ_F_MQROOT 8 | |
1abbe139 ED |
69 | #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for |
70 | * q->dev_queue : It can test | |
71 | * netif_xmit_frozen_or_stopped() before | |
72 | * dequeueing next packet. | |
73 | * Its true for MQ/MQPRIO slaves, or non | |
74 | * multiqueue device. | |
75 | */ | |
b00355db | 76 | #define TCQ_F_WARN_NONWC (1 << 16) |
22e0f8b9 | 77 | #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */ |
4eaf3b84 ED |
78 | #define TCQ_F_NOPARENT 0x40 /* root of its hierarchy : |
79 | * qdisc_tree_decrease_qlen() should stop. | |
80 | */ | |
49b49971 | 81 | #define TCQ_F_INVISIBLE 0x80 /* invisible by default in dump */ |
6b3ba914 | 82 | #define TCQ_F_NOLOCK 0x100 /* qdisc does not require locking */ |
7a4fa291 | 83 | #define TCQ_F_OFFLOADED 0x200 /* qdisc is offloaded to HW */ |
45203a3b | 84 | u32 limit; |
05bdd2f1 | 85 | const struct Qdisc_ops *ops; |
a2da570d | 86 | struct qdisc_size_table __rcu *stab; |
59cc1f61 | 87 | struct hlist_node hash; |
1da177e4 LT |
88 | u32 handle; |
89 | u32 parent; | |
72b25a91 | 90 | |
5e140dfc | 91 | struct netdev_queue *dev_queue; |
5e140dfc | 92 | |
1c0d32fd | 93 | struct net_rate_estimator __rcu *rate_est; |
0d32ef8c ED |
94 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
95 | struct gnet_stats_queue __percpu *cpu_qstats; | |
e9be0e99 PA |
96 | int padded; |
97 | refcount_t refcnt; | |
0d32ef8c | 98 | |
5e140dfc ED |
99 | /* |
100 | * For performance sake on SMP, we put highly modified fields at the end | |
101 | */ | |
a53851e2 | 102 | struct sk_buff_head gso_skb ____cacheline_aligned_in_smp; |
48da34b7 | 103 | struct qdisc_skb_head q; |
0d32ef8c | 104 | struct gnet_stats_basic_packed bstats; |
f9eb8aea | 105 | seqcount_t running; |
0d32ef8c | 106 | struct gnet_stats_queue qstats; |
4d202a0d ED |
107 | unsigned long state; |
108 | struct Qdisc *next_sched; | |
70e57d5e | 109 | struct sk_buff_head skb_bad_txq; |
45203a3b ED |
110 | |
111 | spinlock_t busylock ____cacheline_aligned_in_smp; | |
96009c7d | 112 | spinlock_t seqlock; |
28cff537 PA |
113 | |
114 | /* for NOLOCK qdisc, true if there are no enqueued skbs */ | |
115 | bool empty; | |
3a7d0d07 | 116 | struct rcu_head rcu; |
1da177e4 LT |
117 | }; |
118 | ||
551143d8 ED |
119 | static inline void qdisc_refcount_inc(struct Qdisc *qdisc) |
120 | { | |
121 | if (qdisc->flags & TCQ_F_BUILTIN) | |
122 | return; | |
123 | refcount_inc(&qdisc->refcnt); | |
124 | } | |
125 | ||
9d7e82ce VB |
126 | /* Intended to be used by unlocked users, when concurrent qdisc release is |
127 | * possible. | |
128 | */ | |
129 | ||
130 | static inline struct Qdisc *qdisc_refcount_inc_nz(struct Qdisc *qdisc) | |
131 | { | |
132 | if (qdisc->flags & TCQ_F_BUILTIN) | |
133 | return qdisc; | |
134 | if (refcount_inc_not_zero(&qdisc->refcnt)) | |
135 | return qdisc; | |
136 | return NULL; | |
137 | } | |
138 | ||
96009c7d | 139 | static inline bool qdisc_is_running(struct Qdisc *qdisc) |
bc135b23 | 140 | { |
32f7b44d | 141 | if (qdisc->flags & TCQ_F_NOLOCK) |
96009c7d | 142 | return spin_is_locked(&qdisc->seqlock); |
f9eb8aea | 143 | return (raw_read_seqcount(&qdisc->running) & 1) ? true : false; |
bc135b23 ED |
144 | } |
145 | ||
9c01c9f1 PA |
146 | static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) |
147 | { | |
148 | return q->flags & TCQ_F_CPUSTATS; | |
149 | } | |
150 | ||
28cff537 PA |
151 | static inline bool qdisc_is_empty(const struct Qdisc *qdisc) |
152 | { | |
9c01c9f1 | 153 | if (qdisc_is_percpu_stats(qdisc)) |
28cff537 PA |
154 | return qdisc->empty; |
155 | return !qdisc->q.qlen; | |
156 | } | |
157 | ||
bc135b23 ED |
158 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) |
159 | { | |
32f7b44d | 160 | if (qdisc->flags & TCQ_F_NOLOCK) { |
96009c7d | 161 | if (!spin_trylock(&qdisc->seqlock)) |
32f7b44d | 162 | return false; |
28cff537 | 163 | qdisc->empty = false; |
32f7b44d | 164 | } else if (qdisc_is_running(qdisc)) { |
fd245a4a | 165 | return false; |
32f7b44d | 166 | } |
52fbb290 ED |
167 | /* Variant of write_seqcount_begin() telling lockdep a trylock |
168 | * was attempted. | |
169 | */ | |
170 | raw_write_seqcount_begin(&qdisc->running); | |
171 | seqcount_acquire(&qdisc->running.dep_map, 0, 1, _RET_IP_); | |
fd245a4a | 172 | return true; |
bc135b23 ED |
173 | } |
174 | ||
175 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
176 | { | |
f9eb8aea | 177 | write_seqcount_end(&qdisc->running); |
32f7b44d | 178 | if (qdisc->flags & TCQ_F_NOLOCK) |
96009c7d | 179 | spin_unlock(&qdisc->seqlock); |
fd245a4a ED |
180 | } |
181 | ||
5772e9a3 JDB |
182 | static inline bool qdisc_may_bulk(const struct Qdisc *qdisc) |
183 | { | |
184 | return qdisc->flags & TCQ_F_ONETXQUEUE; | |
185 | } | |
186 | ||
187 | static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq) | |
188 | { | |
189 | #ifdef CONFIG_BQL | |
190 | /* Non-BQL migrated drivers will return 0, too. */ | |
191 | return dql_avail(&txq->dql); | |
192 | #else | |
193 | return 0; | |
194 | #endif | |
195 | } | |
196 | ||
fd2c3ef7 | 197 | struct Qdisc_class_ops { |
dfcd2a2b | 198 | unsigned int flags; |
1da177e4 | 199 | /* Child qdisc manipulation */ |
926e61b7 | 200 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 | 201 | int (*graft)(struct Qdisc *, unsigned long cl, |
653d6fd6 AA |
202 | struct Qdisc *, struct Qdisc **, |
203 | struct netlink_ext_ack *extack); | |
1da177e4 | 204 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); |
43effa1e | 205 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
206 | |
207 | /* Class manipulation routines */ | |
143976ce | 208 | unsigned long (*find)(struct Qdisc *, u32 classid); |
1da177e4 | 209 | int (*change)(struct Qdisc *, u32, u32, |
793d81d6 AA |
210 | struct nlattr **, unsigned long *, |
211 | struct netlink_ext_ack *); | |
1da177e4 LT |
212 | int (*delete)(struct Qdisc *, unsigned long); |
213 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
214 | ||
215 | /* Filter manipulation */ | |
0ac4bd68 | 216 | struct tcf_block * (*tcf_block)(struct Qdisc *sch, |
cbaacc4e AA |
217 | unsigned long arg, |
218 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
219 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
220 | u32 classid); | |
221 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
222 | ||
223 | /* rtnetlink specific */ | |
224 | int (*dump)(struct Qdisc *, unsigned long, | |
225 | struct sk_buff *skb, struct tcmsg*); | |
226 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
227 | struct gnet_dump *); | |
228 | }; | |
229 | ||
dfcd2a2b VB |
230 | /* Qdisc_class_ops flag values */ |
231 | ||
232 | /* Implements API that doesn't require rtnl lock */ | |
233 | enum qdisc_class_ops_flags { | |
234 | QDISC_CLASS_OPS_DOIT_UNLOCKED = 1, | |
235 | }; | |
236 | ||
fd2c3ef7 | 237 | struct Qdisc_ops { |
1da177e4 | 238 | struct Qdisc_ops *next; |
20fea08b | 239 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
240 | char id[IFNAMSIZ]; |
241 | int priv_size; | |
d59f5ffa | 242 | unsigned int static_flags; |
1da177e4 | 243 | |
520ac30f ED |
244 | int (*enqueue)(struct sk_buff *skb, |
245 | struct Qdisc *sch, | |
246 | struct sk_buff **to_free); | |
1da177e4 | 247 | struct sk_buff * (*dequeue)(struct Qdisc *); |
90d841fd | 248 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 | 249 | |
e63d7dfd AA |
250 | int (*init)(struct Qdisc *sch, struct nlattr *arg, |
251 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
252 | void (*reset)(struct Qdisc *); |
253 | void (*destroy)(struct Qdisc *); | |
0ac4bd68 | 254 | int (*change)(struct Qdisc *sch, |
2030721c AA |
255 | struct nlattr *arg, |
256 | struct netlink_ext_ack *extack); | |
0ac4bd68 | 257 | void (*attach)(struct Qdisc *sch); |
48bfd55e | 258 | int (*change_tx_queue_len)(struct Qdisc *, unsigned int); |
1da177e4 LT |
259 | |
260 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
261 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
262 | ||
d47a6b0e JP |
263 | void (*ingress_block_set)(struct Qdisc *sch, |
264 | u32 block_index); | |
265 | void (*egress_block_set)(struct Qdisc *sch, | |
266 | u32 block_index); | |
267 | u32 (*ingress_block_get)(struct Qdisc *sch); | |
268 | u32 (*egress_block_get)(struct Qdisc *sch); | |
269 | ||
1da177e4 LT |
270 | struct module *owner; |
271 | }; | |
272 | ||
273 | ||
fd2c3ef7 | 274 | struct tcf_result { |
db50514f JP |
275 | union { |
276 | struct { | |
277 | unsigned long class; | |
278 | u32 classid; | |
279 | }; | |
280 | const struct tcf_proto *goto_tp; | |
cd11b164 PA |
281 | |
282 | /* used by the TC_ACT_REINSERT action */ | |
283 | struct { | |
284 | bool ingress; | |
285 | struct gnet_stats_queue *qstats; | |
286 | }; | |
db50514f | 287 | }; |
1da177e4 LT |
288 | }; |
289 | ||
9f407f17 JP |
290 | struct tcf_chain; |
291 | ||
fd2c3ef7 | 292 | struct tcf_proto_ops { |
36272874 | 293 | struct list_head head; |
1da177e4 LT |
294 | char kind[IFNAMSIZ]; |
295 | ||
dc7f9f6e ED |
296 | int (*classify)(struct sk_buff *, |
297 | const struct tcf_proto *, | |
298 | struct tcf_result *); | |
1da177e4 | 299 | int (*init)(struct tcf_proto*); |
12db03b6 | 300 | void (*destroy)(struct tcf_proto *tp, bool rtnl_held, |
715df5ec | 301 | struct netlink_ext_ack *extack); |
1da177e4 | 302 | |
8113c095 | 303 | void* (*get)(struct tcf_proto*, u32 handle); |
7d5509fa | 304 | void (*put)(struct tcf_proto *tp, void *f); |
c1b52739 | 305 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 306 | struct tcf_proto*, unsigned long, |
add93b61 | 307 | u32 handle, struct nlattr **, |
12db03b6 | 308 | void **, bool, bool, |
7306db38 | 309 | struct netlink_ext_ack *); |
8865fdd4 | 310 | int (*delete)(struct tcf_proto *tp, void *arg, |
12db03b6 | 311 | bool *last, bool rtnl_held, |
571acf21 | 312 | struct netlink_ext_ack *); |
12db03b6 VB |
313 | void (*walk)(struct tcf_proto *tp, |
314 | struct tcf_walker *arg, bool rtnl_held); | |
e56185c7 JH |
315 | int (*reoffload)(struct tcf_proto *tp, bool add, |
316 | tc_setup_cb_t *cb, void *cb_priv, | |
317 | struct netlink_ext_ack *extack); | |
07d79fc7 | 318 | void (*bind_class)(void *, u32, unsigned long); |
9f407f17 JP |
319 | void * (*tmplt_create)(struct net *net, |
320 | struct tcf_chain *chain, | |
321 | struct nlattr **tca, | |
322 | struct netlink_ext_ack *extack); | |
323 | void (*tmplt_destroy)(void *tmplt_priv); | |
1da177e4 LT |
324 | |
325 | /* rtnetlink specific */ | |
8113c095 | 326 | int (*dump)(struct net*, struct tcf_proto*, void *, |
12db03b6 VB |
327 | struct sk_buff *skb, struct tcmsg*, |
328 | bool); | |
9f407f17 JP |
329 | int (*tmplt_dump)(struct sk_buff *skb, |
330 | struct net *net, | |
331 | void *tmplt_priv); | |
1da177e4 LT |
332 | |
333 | struct module *owner; | |
12db03b6 VB |
334 | int flags; |
335 | }; | |
336 | ||
337 | enum tcf_proto_ops_flags { | |
338 | TCF_PROTO_OPS_DOIT_UNLOCKED = 1, | |
1da177e4 LT |
339 | }; |
340 | ||
fd2c3ef7 | 341 | struct tcf_proto { |
1da177e4 | 342 | /* Fast access part */ |
25d8c0d5 JF |
343 | struct tcf_proto __rcu *next; |
344 | void __rcu *root; | |
7fd4b288 PA |
345 | |
346 | /* called under RCU BH lock*/ | |
dc7f9f6e ED |
347 | int (*classify)(struct sk_buff *, |
348 | const struct tcf_proto *, | |
349 | struct tcf_result *); | |
66c6f529 | 350 | __be16 protocol; |
1da177e4 LT |
351 | |
352 | /* All the rest */ | |
353 | u32 prio; | |
1da177e4 | 354 | void *data; |
dc7f9f6e | 355 | const struct tcf_proto_ops *ops; |
5bc17018 | 356 | struct tcf_chain *chain; |
8b64678e VB |
357 | /* Lock protects tcf_proto shared state and can be used by unlocked |
358 | * classifiers to protect their private data. | |
359 | */ | |
360 | spinlock_t lock; | |
361 | bool deleting; | |
4dbfa766 | 362 | refcount_t refcnt; |
25d8c0d5 | 363 | struct rcu_head rcu; |
1da177e4 LT |
364 | }; |
365 | ||
175f9c1b | 366 | struct qdisc_skb_cb { |
089b19a9 SF |
367 | struct { |
368 | unsigned int pkt_len; | |
369 | u16 slave_dev_queue_mapping; | |
370 | u16 tc_classid; | |
d58e468b | 371 | }; |
25711786 ED |
372 | #define QDISC_CB_PRIV_LEN 20 |
373 | unsigned char data[QDISC_CB_PRIV_LEN]; | |
175f9c1b JK |
374 | }; |
375 | ||
c7eb7d72 JP |
376 | typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv); |
377 | ||
2190d1d0 | 378 | struct tcf_chain { |
ed76f5ed VB |
379 | /* Protects filter_chain. */ |
380 | struct mutex filter_chain_lock; | |
2190d1d0 | 381 | struct tcf_proto __rcu *filter_chain; |
5bc17018 JP |
382 | struct list_head list; |
383 | struct tcf_block *block; | |
384 | u32 index; /* chain index */ | |
385 | unsigned int refcnt; | |
1f3ed383 | 386 | unsigned int action_refcnt; |
32a4f5ec | 387 | bool explicitly_created; |
726d0612 | 388 | bool flushing; |
9f407f17 JP |
389 | const struct tcf_proto_ops *tmplt_ops; |
390 | void *tmplt_priv; | |
ee3bbfe8 | 391 | struct rcu_head rcu; |
6529eaba JP |
392 | }; |
393 | ||
2190d1d0 | 394 | struct tcf_block { |
c266f64d VB |
395 | /* Lock protects tcf_block and lifetime-management data of chains |
396 | * attached to the block (refcnt, action_refcnt, explicitly_created). | |
397 | */ | |
398 | struct mutex lock; | |
5bc17018 | 399 | struct list_head chain_list; |
48617387 | 400 | u32 index; /* block index for shared blocks */ |
cfebd7e2 | 401 | refcount_t refcnt; |
855319be | 402 | struct net *net; |
69d78ef2 | 403 | struct Qdisc *q; |
acb67442 | 404 | struct list_head cb_list; |
f36fe1c4 JP |
405 | struct list_head owner_list; |
406 | bool keep_dst; | |
caa72601 JP |
407 | unsigned int offloadcnt; /* Number of oddloaded filters */ |
408 | unsigned int nooffloaddevcnt; /* Number of devs unable to do offload */ | |
f71e0ca4 JP |
409 | struct { |
410 | struct tcf_chain *chain; | |
411 | struct list_head filter_chain_list; | |
412 | } chain0; | |
0607e439 | 413 | struct rcu_head rcu; |
2190d1d0 JP |
414 | }; |
415 | ||
ed76f5ed VB |
416 | #ifdef CONFIG_PROVE_LOCKING |
417 | static inline bool lockdep_tcf_chain_is_locked(struct tcf_chain *chain) | |
418 | { | |
419 | return lockdep_is_held(&chain->filter_chain_lock); | |
420 | } | |
8b64678e VB |
421 | |
422 | static inline bool lockdep_tcf_proto_is_locked(struct tcf_proto *tp) | |
423 | { | |
424 | return lockdep_is_held(&tp->lock); | |
425 | } | |
ed76f5ed VB |
426 | #else |
427 | static inline bool lockdep_tcf_chain_is_locked(struct tcf_block *chain) | |
428 | { | |
429 | return true; | |
430 | } | |
8b64678e VB |
431 | |
432 | static inline bool lockdep_tcf_proto_is_locked(struct tcf_proto *tp) | |
433 | { | |
434 | return true; | |
435 | } | |
ed76f5ed VB |
436 | #endif /* #ifdef CONFIG_PROVE_LOCKING */ |
437 | ||
438 | #define tcf_chain_dereference(p, chain) \ | |
439 | rcu_dereference_protected(p, lockdep_tcf_chain_is_locked(chain)) | |
440 | ||
8b64678e VB |
441 | #define tcf_proto_dereference(p, tp) \ |
442 | rcu_dereference_protected(p, lockdep_tcf_proto_is_locked(tp)) | |
443 | ||
caa72601 JP |
444 | static inline void tcf_block_offload_inc(struct tcf_block *block, u32 *flags) |
445 | { | |
446 | if (*flags & TCA_CLS_FLAGS_IN_HW) | |
447 | return; | |
448 | *flags |= TCA_CLS_FLAGS_IN_HW; | |
449 | block->offloadcnt++; | |
450 | } | |
451 | ||
452 | static inline void tcf_block_offload_dec(struct tcf_block *block, u32 *flags) | |
453 | { | |
454 | if (!(*flags & TCA_CLS_FLAGS_IN_HW)) | |
455 | return; | |
456 | *flags &= ~TCA_CLS_FLAGS_IN_HW; | |
457 | block->offloadcnt--; | |
458 | } | |
459 | ||
31533cba | 460 | static inline void |
86c55361 | 461 | tc_cls_offload_cnt_update(struct tcf_block *block, u32 *cnt, |
31533cba JH |
462 | u32 *flags, bool add) |
463 | { | |
464 | if (add) { | |
465 | if (!*cnt) | |
466 | tcf_block_offload_inc(block, flags); | |
467 | (*cnt)++; | |
468 | } else { | |
469 | (*cnt)--; | |
470 | if (!*cnt) | |
471 | tcf_block_offload_dec(block, flags); | |
472 | } | |
473 | } | |
474 | ||
16bda13d DM |
475 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
476 | { | |
477 | struct qdisc_skb_cb *qcb; | |
5ee31c68 ED |
478 | |
479 | BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); | |
16bda13d DM |
480 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
481 | } | |
482 | ||
73eb628d PA |
483 | static inline int qdisc_qlen_cpu(const struct Qdisc *q) |
484 | { | |
485 | return this_cpu_ptr(q->cpu_qstats)->qlen; | |
486 | } | |
487 | ||
05bdd2f1 | 488 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
489 | { |
490 | return q->q.qlen; | |
491 | } | |
492 | ||
73eb628d | 493 | static inline int qdisc_qlen_sum(const struct Qdisc *q) |
7e66016f | 494 | { |
73eb628d PA |
495 | __u32 qlen = q->qstats.qlen; |
496 | int i; | |
7e66016f | 497 | |
73eb628d PA |
498 | if (qdisc_is_percpu_stats(q)) { |
499 | for_each_possible_cpu(i) | |
500 | qlen += per_cpu_ptr(q->cpu_qstats, i)->qlen; | |
501 | } else { | |
6172abc1 | 502 | qlen += q->q.qlen; |
73eb628d | 503 | } |
7e66016f JF |
504 | |
505 | return qlen; | |
506 | } | |
507 | ||
bfe0d029 | 508 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
509 | { |
510 | return (struct qdisc_skb_cb *)skb->cb; | |
511 | } | |
512 | ||
83874000 DM |
513 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
514 | { | |
515 | return &qdisc->q.lock; | |
516 | } | |
517 | ||
05bdd2f1 | 518 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc | 519 | { |
46e5da40 JF |
520 | struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc); |
521 | ||
522 | return q; | |
7698b4fc DM |
523 | } |
524 | ||
05bdd2f1 | 525 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
526 | { |
527 | return qdisc->dev_queue->qdisc_sleeping; | |
528 | } | |
529 | ||
7e43f112 DM |
530 | /* The qdisc root lock is a mechanism by which to top level |
531 | * of a qdisc tree can be locked from any qdisc node in the | |
532 | * forest. This allows changing the configuration of some | |
533 | * aspect of the qdisc tree while blocking out asynchronous | |
534 | * qdisc access in the packet processing paths. | |
535 | * | |
536 | * It is only legal to do this when the root will not change | |
537 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
538 | * root. This is enforced by holding the RTNL semaphore, which | |
539 | * all users of this lock accessor must do. | |
540 | */ | |
05bdd2f1 | 541 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
542 | { |
543 | struct Qdisc *root = qdisc_root(qdisc); | |
544 | ||
7e43f112 | 545 | ASSERT_RTNL(); |
83874000 | 546 | return qdisc_lock(root); |
7698b4fc DM |
547 | } |
548 | ||
05bdd2f1 | 549 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
550 | { |
551 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
552 | ||
553 | ASSERT_RTNL(); | |
554 | return qdisc_lock(root); | |
555 | } | |
556 | ||
edb09eb1 ED |
557 | static inline seqcount_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc) |
558 | { | |
559 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
560 | ||
561 | ASSERT_RTNL(); | |
562 | return &root->running; | |
563 | } | |
564 | ||
05bdd2f1 | 565 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
566 | { |
567 | return qdisc->dev_queue->dev; | |
568 | } | |
1da177e4 | 569 | |
05bdd2f1 | 570 | static inline void sch_tree_lock(const struct Qdisc *q) |
78a5b30b | 571 | { |
fe439dd0 | 572 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
573 | } |
574 | ||
05bdd2f1 | 575 | static inline void sch_tree_unlock(const struct Qdisc *q) |
78a5b30b | 576 | { |
fe439dd0 | 577 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
578 | } |
579 | ||
e41a33e6 TG |
580 | extern struct Qdisc noop_qdisc; |
581 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
582 | extern struct Qdisc_ops pfifo_fast_ops; |
583 | extern struct Qdisc_ops mq_qdisc_ops; | |
d66d6c31 | 584 | extern struct Qdisc_ops noqueue_qdisc_ops; |
6da7c8fc | 585 | extern const struct Qdisc_ops *default_qdisc_ops; |
1f27cde3 ED |
586 | static inline const struct Qdisc_ops * |
587 | get_default_qdisc_ops(const struct net_device *dev, int ntx) | |
588 | { | |
589 | return ntx < dev->real_num_tx_queues ? | |
590 | default_qdisc_ops : &pfifo_fast_ops; | |
591 | } | |
e41a33e6 | 592 | |
fd2c3ef7 | 593 | struct Qdisc_class_common { |
6fe1c7a5 PM |
594 | u32 classid; |
595 | struct hlist_node hnode; | |
596 | }; | |
597 | ||
fd2c3ef7 | 598 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
599 | struct hlist_head *hash; |
600 | unsigned int hashsize; | |
601 | unsigned int hashmask; | |
602 | unsigned int hashelems; | |
603 | }; | |
604 | ||
605 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
606 | { | |
607 | id ^= id >> 8; | |
608 | id ^= id >> 4; | |
609 | return id & mask; | |
610 | } | |
611 | ||
612 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 613 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
614 | { |
615 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
616 | unsigned int h; |
617 | ||
7d3f0cd4 GF |
618 | if (!id) |
619 | return NULL; | |
620 | ||
6fe1c7a5 | 621 | h = qdisc_class_hash(id, hash->hashmask); |
b67bfe0d | 622 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
623 | if (cl->classid == id) |
624 | return cl; | |
625 | } | |
626 | return NULL; | |
627 | } | |
628 | ||
384c181e AN |
629 | static inline int tc_classid_to_hwtc(struct net_device *dev, u32 classid) |
630 | { | |
631 | u32 hwtc = TC_H_MIN(classid) - TC_H_MIN_PRIORITY; | |
632 | ||
633 | return (hwtc < netdev_get_num_tc(dev)) ? hwtc : -EINVAL; | |
634 | } | |
635 | ||
5c15257f JP |
636 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
637 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, | |
638 | struct Qdisc_class_common *); | |
639 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, | |
640 | struct Qdisc_class_common *); | |
641 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
642 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
643 | ||
48bfd55e | 644 | int dev_qdisc_change_tx_queue_len(struct net_device *dev); |
5c15257f JP |
645 | void dev_init_scheduler(struct net_device *dev); |
646 | void dev_shutdown(struct net_device *dev); | |
647 | void dev_activate(struct net_device *dev); | |
648 | void dev_deactivate(struct net_device *dev); | |
649 | void dev_deactivate_many(struct list_head *head); | |
650 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, | |
651 | struct Qdisc *qdisc); | |
652 | void qdisc_reset(struct Qdisc *qdisc); | |
86bd446b | 653 | void qdisc_put(struct Qdisc *qdisc); |
3a7d0d07 | 654 | void qdisc_put_unlocked(struct Qdisc *qdisc); |
5f2939d9 | 655 | void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, int n, int len); |
b592843c JK |
656 | #ifdef CONFIG_NET_SCHED |
657 | int qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type, | |
658 | void *type_data); | |
bfaee911 JK |
659 | void qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch, |
660 | struct Qdisc *new, struct Qdisc *old, | |
661 | enum tc_setup_type type, void *type_data, | |
662 | struct netlink_ext_ack *extack); | |
b592843c JK |
663 | #else |
664 | static inline int | |
665 | qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type, | |
666 | void *type_data) | |
667 | { | |
668 | q->flags &= ~TCQ_F_OFFLOADED; | |
669 | return 0; | |
670 | } | |
bfaee911 JK |
671 | |
672 | static inline void | |
673 | qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch, | |
674 | struct Qdisc *new, struct Qdisc *old, | |
675 | enum tc_setup_type type, void *type_data, | |
676 | struct netlink_ext_ack *extack) | |
677 | { | |
678 | } | |
b592843c | 679 | #endif |
5c15257f | 680 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
d0bd684d AA |
681 | const struct Qdisc_ops *ops, |
682 | struct netlink_ext_ack *extack); | |
81d947e2 | 683 | void qdisc_free(struct Qdisc *qdisc); |
5c15257f | 684 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
a38a9882 AA |
685 | const struct Qdisc_ops *ops, u32 parentid, |
686 | struct netlink_ext_ack *extack); | |
5c15257f JP |
687 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
688 | const struct qdisc_size_table *stab); | |
27b29f63 | 689 | int skb_do_redirect(struct sk_buff *); |
1da177e4 | 690 | |
a5135bcf WB |
691 | static inline void skb_reset_tc(struct sk_buff *skb) |
692 | { | |
693 | #ifdef CONFIG_NET_CLS_ACT | |
bc31c905 | 694 | skb->tc_redirected = 0; |
a5135bcf WB |
695 | #endif |
696 | } | |
697 | ||
cd11b164 PA |
698 | static inline bool skb_is_tc_redirected(const struct sk_buff *skb) |
699 | { | |
700 | #ifdef CONFIG_NET_CLS_ACT | |
701 | return skb->tc_redirected; | |
702 | #else | |
703 | return false; | |
704 | #endif | |
705 | } | |
706 | ||
fdc5432a DB |
707 | static inline bool skb_at_tc_ingress(const struct sk_buff *skb) |
708 | { | |
709 | #ifdef CONFIG_NET_CLS_ACT | |
8dc07fdb | 710 | return skb->tc_at_ingress; |
fdc5432a DB |
711 | #else |
712 | return false; | |
713 | #endif | |
714 | } | |
715 | ||
e7246e12 WB |
716 | static inline bool skb_skip_tc_classify(struct sk_buff *skb) |
717 | { | |
718 | #ifdef CONFIG_NET_CLS_ACT | |
719 | if (skb->tc_skip_classify) { | |
720 | skb->tc_skip_classify = 0; | |
721 | return true; | |
722 | } | |
723 | #endif | |
724 | return false; | |
725 | } | |
726 | ||
3a053b1a | 727 | /* Reset all TX qdiscs greater than index of a device. */ |
f0796d5c | 728 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) |
5aa70995 | 729 | { |
4ef6acff JF |
730 | struct Qdisc *qdisc; |
731 | ||
f0796d5c | 732 | for (; i < dev->num_tx_queues; i++) { |
46e5da40 | 733 | qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc); |
4ef6acff JF |
734 | if (qdisc) { |
735 | spin_lock_bh(qdisc_lock(qdisc)); | |
736 | qdisc_reset(qdisc); | |
737 | spin_unlock_bh(qdisc_lock(qdisc)); | |
738 | } | |
739 | } | |
5aa70995 DM |
740 | } |
741 | ||
5aa70995 DM |
742 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
743 | { | |
f0796d5c | 744 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
745 | } |
746 | ||
3e745dd6 DM |
747 | /* Are all TX queues of the device empty? */ |
748 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
749 | { | |
e8a0464c | 750 | unsigned int i; |
46e5da40 JF |
751 | |
752 | rcu_read_lock(); | |
e8a0464c DM |
753 | for (i = 0; i < dev->num_tx_queues; i++) { |
754 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 755 | const struct Qdisc *q = rcu_dereference(txq->qdisc); |
3e745dd6 | 756 | |
1f5e6fdd | 757 | if (!qdisc_is_empty(q)) { |
46e5da40 | 758 | rcu_read_unlock(); |
e8a0464c | 759 | return false; |
46e5da40 | 760 | } |
e8a0464c | 761 | } |
46e5da40 | 762 | rcu_read_unlock(); |
e8a0464c | 763 | return true; |
3e745dd6 DM |
764 | } |
765 | ||
6fa9864b | 766 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 767 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 768 | { |
e8a0464c | 769 | unsigned int i; |
46e5da40 | 770 | |
e8a0464c DM |
771 | for (i = 0; i < dev->num_tx_queues; i++) { |
772 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 773 | if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping) |
e8a0464c DM |
774 | return true; |
775 | } | |
776 | return false; | |
6fa9864b DM |
777 | } |
778 | ||
e8a0464c | 779 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
780 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
781 | { | |
e8a0464c | 782 | unsigned int i; |
46e5da40 | 783 | |
e8a0464c DM |
784 | for (i = 0; i < dev->num_tx_queues; i++) { |
785 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 786 | if (rcu_access_pointer(txq->qdisc) != &noop_qdisc) |
e8a0464c DM |
787 | return false; |
788 | } | |
789 | return true; | |
05297949 DM |
790 | } |
791 | ||
bfe0d029 | 792 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 793 | { |
175f9c1b | 794 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
795 | } |
796 | ||
c27f339a | 797 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
798 | enum net_xmit_qdisc_t { |
799 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 800 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
801 | }; |
802 | ||
c27f339a | 803 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 804 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
805 | #else |
806 | #define net_xmit_drop_count(e) (1) | |
807 | #endif | |
808 | ||
a2da570d ED |
809 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
810 | const struct Qdisc *sch) | |
5f86173b | 811 | { |
3a682fbd | 812 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
813 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
814 | ||
815 | if (stab) | |
816 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 817 | #endif |
a2da570d ED |
818 | } |
819 | ||
520ac30f ED |
820 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
821 | struct sk_buff **to_free) | |
a2da570d ED |
822 | { |
823 | qdisc_calculate_pkt_len(skb, sch); | |
520ac30f | 824 | return sch->enqueue(skb, sch, to_free); |
5f86173b JK |
825 | } |
826 | ||
38040702 AV |
827 | static inline void _bstats_update(struct gnet_stats_basic_packed *bstats, |
828 | __u64 bytes, __u32 packets) | |
829 | { | |
830 | bstats->bytes += bytes; | |
831 | bstats->packets += packets; | |
832 | } | |
833 | ||
bfe0d029 ED |
834 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, |
835 | const struct sk_buff *skb) | |
836 | { | |
38040702 AV |
837 | _bstats_update(bstats, |
838 | qdisc_pkt_len(skb), | |
839 | skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1); | |
840 | } | |
841 | ||
842 | static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, | |
843 | __u64 bytes, __u32 packets) | |
844 | { | |
845 | u64_stats_update_begin(&bstats->syncp); | |
846 | _bstats_update(&bstats->bstats, bytes, packets); | |
847 | u64_stats_update_end(&bstats->syncp); | |
bfe0d029 ED |
848 | } |
849 | ||
24ea591d ED |
850 | static inline void bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, |
851 | const struct sk_buff *skb) | |
22e0f8b9 | 852 | { |
22e0f8b9 JF |
853 | u64_stats_update_begin(&bstats->syncp); |
854 | bstats_update(&bstats->bstats, skb); | |
855 | u64_stats_update_end(&bstats->syncp); | |
856 | } | |
857 | ||
24ea591d ED |
858 | static inline void qdisc_bstats_cpu_update(struct Qdisc *sch, |
859 | const struct sk_buff *skb) | |
860 | { | |
861 | bstats_cpu_update(this_cpu_ptr(sch->cpu_bstats), skb); | |
862 | } | |
863 | ||
bfe0d029 ED |
864 | static inline void qdisc_bstats_update(struct Qdisc *sch, |
865 | const struct sk_buff *skb) | |
bbd8a0d3 | 866 | { |
bfe0d029 | 867 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
868 | } |
869 | ||
25331d6c JF |
870 | static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch, |
871 | const struct sk_buff *skb) | |
872 | { | |
873 | sch->qstats.backlog -= qdisc_pkt_len(skb); | |
874 | } | |
875 | ||
40bd0362 JF |
876 | static inline void qdisc_qstats_cpu_backlog_dec(struct Qdisc *sch, |
877 | const struct sk_buff *skb) | |
878 | { | |
879 | this_cpu_sub(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
880 | } | |
881 | ||
25331d6c JF |
882 | static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch, |
883 | const struct sk_buff *skb) | |
884 | { | |
885 | sch->qstats.backlog += qdisc_pkt_len(skb); | |
886 | } | |
887 | ||
40bd0362 JF |
888 | static inline void qdisc_qstats_cpu_backlog_inc(struct Qdisc *sch, |
889 | const struct sk_buff *skb) | |
890 | { | |
891 | this_cpu_add(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
892 | } | |
893 | ||
73eb628d | 894 | static inline void qdisc_qstats_cpu_qlen_inc(struct Qdisc *sch) |
40bd0362 | 895 | { |
73eb628d | 896 | this_cpu_inc(sch->cpu_qstats->qlen); |
40bd0362 JF |
897 | } |
898 | ||
73eb628d | 899 | static inline void qdisc_qstats_cpu_qlen_dec(struct Qdisc *sch) |
40bd0362 | 900 | { |
73eb628d | 901 | this_cpu_dec(sch->cpu_qstats->qlen); |
40bd0362 JF |
902 | } |
903 | ||
904 | static inline void qdisc_qstats_cpu_requeues_inc(struct Qdisc *sch) | |
905 | { | |
906 | this_cpu_inc(sch->cpu_qstats->requeues); | |
907 | } | |
908 | ||
25331d6c JF |
909 | static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count) |
910 | { | |
911 | sch->qstats.drops += count; | |
912 | } | |
913 | ||
24ea591d | 914 | static inline void qstats_drop_inc(struct gnet_stats_queue *qstats) |
25331d6c | 915 | { |
24ea591d | 916 | qstats->drops++; |
25331d6c JF |
917 | } |
918 | ||
24ea591d | 919 | static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats) |
b0ab6f92 | 920 | { |
24ea591d ED |
921 | qstats->overlimits++; |
922 | } | |
b0ab6f92 | 923 | |
24ea591d ED |
924 | static inline void qdisc_qstats_drop(struct Qdisc *sch) |
925 | { | |
926 | qstats_drop_inc(&sch->qstats); | |
927 | } | |
928 | ||
929 | static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch) | |
930 | { | |
eb60a8dd | 931 | this_cpu_inc(sch->cpu_qstats->drops); |
b0ab6f92 JF |
932 | } |
933 | ||
25331d6c JF |
934 | static inline void qdisc_qstats_overlimit(struct Qdisc *sch) |
935 | { | |
936 | sch->qstats.overlimits++; | |
937 | } | |
938 | ||
5dd431b6 PA |
939 | static inline int qdisc_qstats_copy(struct gnet_dump *d, struct Qdisc *sch) |
940 | { | |
941 | __u32 qlen = qdisc_qlen_sum(sch); | |
942 | ||
943 | return gnet_stats_copy_queue(d, sch->cpu_qstats, &sch->qstats, qlen); | |
944 | } | |
945 | ||
946 | static inline void qdisc_qstats_qlen_backlog(struct Qdisc *sch, __u32 *qlen, | |
947 | __u32 *backlog) | |
948 | { | |
949 | struct gnet_stats_queue qstats = { 0 }; | |
950 | __u32 len = qdisc_qlen_sum(sch); | |
951 | ||
952 | __gnet_stats_copy_queue(&qstats, sch->cpu_qstats, &sch->qstats, len); | |
953 | *qlen = qstats.qlen; | |
954 | *backlog = qstats.backlog; | |
955 | } | |
956 | ||
e5f0e8f8 PA |
957 | static inline void qdisc_tree_flush_backlog(struct Qdisc *sch) |
958 | { | |
959 | __u32 qlen, backlog; | |
960 | ||
961 | qdisc_qstats_qlen_backlog(sch, &qlen, &backlog); | |
962 | qdisc_tree_reduce_backlog(sch, qlen, backlog); | |
963 | } | |
964 | ||
965 | static inline void qdisc_purge_queue(struct Qdisc *sch) | |
966 | { | |
967 | __u32 qlen, backlog; | |
968 | ||
969 | qdisc_qstats_qlen_backlog(sch, &qlen, &backlog); | |
970 | qdisc_reset(sch); | |
971 | qdisc_tree_reduce_backlog(sch, qlen, backlog); | |
972 | } | |
973 | ||
48da34b7 FW |
974 | static inline void qdisc_skb_head_init(struct qdisc_skb_head *qh) |
975 | { | |
976 | qh->head = NULL; | |
977 | qh->tail = NULL; | |
978 | qh->qlen = 0; | |
979 | } | |
980 | ||
aea890b8 DM |
981 | static inline void __qdisc_enqueue_tail(struct sk_buff *skb, |
982 | struct qdisc_skb_head *qh) | |
9972b25d | 983 | { |
48da34b7 FW |
984 | struct sk_buff *last = qh->tail; |
985 | ||
986 | if (last) { | |
987 | skb->next = NULL; | |
988 | last->next = skb; | |
989 | qh->tail = skb; | |
990 | } else { | |
991 | qh->tail = skb; | |
992 | qh->head = skb; | |
993 | } | |
994 | qh->qlen++; | |
9972b25d TG |
995 | } |
996 | ||
997 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
998 | { | |
aea890b8 DM |
999 | __qdisc_enqueue_tail(skb, &sch->q); |
1000 | qdisc_qstats_backlog_inc(sch, skb); | |
1001 | return NET_XMIT_SUCCESS; | |
9972b25d TG |
1002 | } |
1003 | ||
59697730 DM |
1004 | static inline void __qdisc_enqueue_head(struct sk_buff *skb, |
1005 | struct qdisc_skb_head *qh) | |
1006 | { | |
1007 | skb->next = qh->head; | |
1008 | ||
1009 | if (!qh->head) | |
1010 | qh->tail = skb; | |
1011 | qh->head = skb; | |
1012 | qh->qlen++; | |
1013 | } | |
1014 | ||
48da34b7 | 1015 | static inline struct sk_buff *__qdisc_dequeue_head(struct qdisc_skb_head *qh) |
9972b25d | 1016 | { |
48da34b7 FW |
1017 | struct sk_buff *skb = qh->head; |
1018 | ||
1019 | if (likely(skb != NULL)) { | |
1020 | qh->head = skb->next; | |
1021 | qh->qlen--; | |
1022 | if (qh->head == NULL) | |
1023 | qh->tail = NULL; | |
1024 | skb->next = NULL; | |
1025 | } | |
9972b25d | 1026 | |
ec323368 FW |
1027 | return skb; |
1028 | } | |
1029 | ||
1030 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
1031 | { | |
1032 | struct sk_buff *skb = __qdisc_dequeue_head(&sch->q); | |
1033 | ||
9190b3b3 | 1034 | if (likely(skb != NULL)) { |
25331d6c | 1035 | qdisc_qstats_backlog_dec(sch, skb); |
9190b3b3 ED |
1036 | qdisc_bstats_update(sch, skb); |
1037 | } | |
9972b25d TG |
1038 | |
1039 | return skb; | |
1040 | } | |
1041 | ||
520ac30f ED |
1042 | /* Instead of calling kfree_skb() while root qdisc lock is held, |
1043 | * queue the skb for future freeing at end of __dev_xmit_skb() | |
1044 | */ | |
1045 | static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free) | |
1046 | { | |
1047 | skb->next = *to_free; | |
1048 | *to_free = skb; | |
1049 | } | |
1050 | ||
35d889d1 AK |
1051 | static inline void __qdisc_drop_all(struct sk_buff *skb, |
1052 | struct sk_buff **to_free) | |
1053 | { | |
1054 | if (skb->prev) | |
1055 | skb->prev->next = *to_free; | |
1056 | else | |
1057 | skb->next = *to_free; | |
1058 | *to_free = skb; | |
1059 | } | |
1060 | ||
57dbb2d8 | 1061 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, |
48da34b7 | 1062 | struct qdisc_skb_head *qh, |
520ac30f | 1063 | struct sk_buff **to_free) |
57dbb2d8 | 1064 | { |
48da34b7 | 1065 | struct sk_buff *skb = __qdisc_dequeue_head(qh); |
57dbb2d8 HPP |
1066 | |
1067 | if (likely(skb != NULL)) { | |
1068 | unsigned int len = qdisc_pkt_len(skb); | |
520ac30f | 1069 | |
25331d6c | 1070 | qdisc_qstats_backlog_dec(sch, skb); |
520ac30f | 1071 | __qdisc_drop(skb, to_free); |
57dbb2d8 HPP |
1072 | return len; |
1073 | } | |
1074 | ||
1075 | return 0; | |
1076 | } | |
1077 | ||
520ac30f ED |
1078 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch, |
1079 | struct sk_buff **to_free) | |
57dbb2d8 | 1080 | { |
520ac30f | 1081 | return __qdisc_queue_drop_head(sch, &sch->q, to_free); |
9972b25d TG |
1082 | } |
1083 | ||
48a8f519 PM |
1084 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
1085 | { | |
48da34b7 FW |
1086 | const struct qdisc_skb_head *qh = &sch->q; |
1087 | ||
1088 | return qh->head; | |
48a8f519 PM |
1089 | } |
1090 | ||
77be155c JP |
1091 | /* generic pseudo peek method for non-work-conserving qdisc */ |
1092 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
1093 | { | |
a53851e2 JF |
1094 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
1095 | ||
77be155c | 1096 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ |
a53851e2 JF |
1097 | if (!skb) { |
1098 | skb = sch->dequeue(sch); | |
1099 | ||
1100 | if (skb) { | |
1101 | __skb_queue_head(&sch->gso_skb, skb); | |
61c9eaf9 | 1102 | /* it's still part of the queue */ |
a53851e2 | 1103 | qdisc_qstats_backlog_inc(sch, skb); |
61c9eaf9 | 1104 | sch->q.qlen++; |
a27758ff | 1105 | } |
61c9eaf9 | 1106 | } |
77be155c | 1107 | |
a53851e2 | 1108 | return skb; |
77be155c JP |
1109 | } |
1110 | ||
8a53e616 PA |
1111 | static inline void qdisc_update_stats_at_dequeue(struct Qdisc *sch, |
1112 | struct sk_buff *skb) | |
1113 | { | |
1114 | if (qdisc_is_percpu_stats(sch)) { | |
1115 | qdisc_qstats_cpu_backlog_dec(sch, skb); | |
1116 | qdisc_bstats_cpu_update(sch, skb); | |
73eb628d | 1117 | qdisc_qstats_cpu_qlen_dec(sch); |
8a53e616 PA |
1118 | } else { |
1119 | qdisc_qstats_backlog_dec(sch, skb); | |
1120 | qdisc_bstats_update(sch, skb); | |
1121 | sch->q.qlen--; | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | static inline void qdisc_update_stats_at_enqueue(struct Qdisc *sch, | |
1126 | unsigned int pkt_len) | |
1127 | { | |
1128 | if (qdisc_is_percpu_stats(sch)) { | |
73eb628d | 1129 | qdisc_qstats_cpu_qlen_inc(sch); |
8a53e616 PA |
1130 | this_cpu_add(sch->cpu_qstats->backlog, pkt_len); |
1131 | } else { | |
1132 | sch->qstats.backlog += pkt_len; | |
1133 | sch->q.qlen++; | |
1134 | } | |
1135 | } | |
1136 | ||
77be155c JP |
1137 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ |
1138 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
1139 | { | |
a53851e2 | 1140 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
77be155c | 1141 | |
61c9eaf9 | 1142 | if (skb) { |
a53851e2 | 1143 | skb = __skb_dequeue(&sch->gso_skb); |
9c01c9f1 PA |
1144 | if (qdisc_is_percpu_stats(sch)) { |
1145 | qdisc_qstats_cpu_backlog_dec(sch, skb); | |
73eb628d | 1146 | qdisc_qstats_cpu_qlen_dec(sch); |
9c01c9f1 PA |
1147 | } else { |
1148 | qdisc_qstats_backlog_dec(sch, skb); | |
1149 | sch->q.qlen--; | |
1150 | } | |
61c9eaf9 | 1151 | } else { |
77be155c | 1152 | skb = sch->dequeue(sch); |
61c9eaf9 | 1153 | } |
77be155c JP |
1154 | |
1155 | return skb; | |
1156 | } | |
1157 | ||
48da34b7 | 1158 | static inline void __qdisc_reset_queue(struct qdisc_skb_head *qh) |
9972b25d TG |
1159 | { |
1160 | /* | |
1161 | * We do not know the backlog in bytes of this list, it | |
1162 | * is up to the caller to correct it | |
1163 | */ | |
48da34b7 FW |
1164 | ASSERT_RTNL(); |
1165 | if (qh->qlen) { | |
1166 | rtnl_kfree_skbs(qh->head, qh->tail); | |
1167 | ||
1168 | qh->head = NULL; | |
1169 | qh->tail = NULL; | |
1170 | qh->qlen = 0; | |
1b5c5493 | 1171 | } |
9972b25d TG |
1172 | } |
1173 | ||
1174 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
1175 | { | |
1b5c5493 | 1176 | __qdisc_reset_queue(&sch->q); |
9972b25d TG |
1177 | sch->qstats.backlog = 0; |
1178 | } | |
1179 | ||
86a7996c WC |
1180 | static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, |
1181 | struct Qdisc **pold) | |
1182 | { | |
1183 | struct Qdisc *old; | |
1184 | ||
1185 | sch_tree_lock(sch); | |
1186 | old = *pold; | |
1187 | *pold = new; | |
e5f0e8f8 PA |
1188 | if (old != NULL) |
1189 | qdisc_tree_flush_backlog(old); | |
86a7996c WC |
1190 | sch_tree_unlock(sch); |
1191 | ||
1192 | return old; | |
1193 | } | |
1194 | ||
1b5c5493 ED |
1195 | static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) |
1196 | { | |
1197 | rtnl_kfree_skbs(skb, skb); | |
1198 | qdisc_qstats_drop(sch); | |
1199 | } | |
1200 | ||
40bd0362 JF |
1201 | static inline int qdisc_drop_cpu(struct sk_buff *skb, struct Qdisc *sch, |
1202 | struct sk_buff **to_free) | |
1203 | { | |
1204 | __qdisc_drop(skb, to_free); | |
1205 | qdisc_qstats_cpu_drop(sch); | |
1206 | ||
1207 | return NET_XMIT_DROP; | |
1208 | } | |
520ac30f ED |
1209 | |
1210 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch, | |
1211 | struct sk_buff **to_free) | |
9972b25d | 1212 | { |
520ac30f | 1213 | __qdisc_drop(skb, to_free); |
25331d6c | 1214 | qdisc_qstats_drop(sch); |
9972b25d TG |
1215 | |
1216 | return NET_XMIT_DROP; | |
1217 | } | |
1218 | ||
35d889d1 AK |
1219 | static inline int qdisc_drop_all(struct sk_buff *skb, struct Qdisc *sch, |
1220 | struct sk_buff **to_free) | |
1221 | { | |
1222 | __qdisc_drop_all(skb, to_free); | |
1223 | qdisc_qstats_drop(sch); | |
1224 | ||
1225 | return NET_XMIT_DROP; | |
1226 | } | |
1227 | ||
e9bef55d JDB |
1228 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
1229 | long it will take to send a packet given its size. | |
1230 | */ | |
1231 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
1232 | { | |
e08b0998 JDB |
1233 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
1234 | if (slot < 0) | |
1235 | slot = 0; | |
e9bef55d JDB |
1236 | slot >>= rtab->rate.cell_log; |
1237 | if (slot > 255) | |
a02cec21 | 1238 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
1239 | return rtab->data[slot]; |
1240 | } | |
1241 | ||
292f1c7f | 1242 | struct psched_ratecfg { |
130d3d68 | 1243 | u64 rate_bytes_ps; /* bytes per second */ |
01cb71d2 ED |
1244 | u32 mult; |
1245 | u16 overhead; | |
8a8e3d84 | 1246 | u8 linklayer; |
01cb71d2 | 1247 | u8 shift; |
292f1c7f JP |
1248 | }; |
1249 | ||
1250 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
1251 | unsigned int len) | |
1252 | { | |
8a8e3d84 JDB |
1253 | len += r->overhead; |
1254 | ||
1255 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) | |
1256 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
1257 | ||
1258 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
1259 | } |
1260 | ||
5c15257f | 1261 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
3e1e3aae ED |
1262 | const struct tc_ratespec *conf, |
1263 | u64 rate64); | |
292f1c7f | 1264 | |
01cb71d2 ED |
1265 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
1266 | const struct psched_ratecfg *r) | |
292f1c7f | 1267 | { |
01cb71d2 | 1268 | memset(res, 0, sizeof(*res)); |
3e1e3aae ED |
1269 | |
1270 | /* legacy struct tc_ratespec has a 32bit @rate field | |
1271 | * Qdisc using 64bit rate should add new attributes | |
1272 | * in order to maintain compatibility. | |
1273 | */ | |
1274 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); | |
1275 | ||
01cb71d2 | 1276 | res->overhead = r->overhead; |
8a8e3d84 | 1277 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
1278 | } |
1279 | ||
46209401 JP |
1280 | /* Mini Qdisc serves for specific needs of ingress/clsact Qdisc. |
1281 | * The fast path only needs to access filter list and to update stats | |
1282 | */ | |
1283 | struct mini_Qdisc { | |
1284 | struct tcf_proto *filter_list; | |
1285 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; | |
1286 | struct gnet_stats_queue __percpu *cpu_qstats; | |
1287 | struct rcu_head rcu; | |
1288 | }; | |
1289 | ||
1290 | static inline void mini_qdisc_bstats_cpu_update(struct mini_Qdisc *miniq, | |
1291 | const struct sk_buff *skb) | |
1292 | { | |
1293 | bstats_cpu_update(this_cpu_ptr(miniq->cpu_bstats), skb); | |
1294 | } | |
1295 | ||
1296 | static inline void mini_qdisc_qstats_cpu_drop(struct mini_Qdisc *miniq) | |
1297 | { | |
1298 | this_cpu_inc(miniq->cpu_qstats->drops); | |
1299 | } | |
1300 | ||
1301 | struct mini_Qdisc_pair { | |
1302 | struct mini_Qdisc miniq1; | |
1303 | struct mini_Qdisc miniq2; | |
1304 | struct mini_Qdisc __rcu **p_miniq; | |
1305 | }; | |
1306 | ||
1307 | void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp, | |
1308 | struct tcf_proto *tp_head); | |
1309 | void mini_qdisc_pair_init(struct mini_Qdisc_pair *miniqp, struct Qdisc *qdisc, | |
1310 | struct mini_Qdisc __rcu **p_miniq); | |
1311 | ||
cd11b164 PA |
1312 | static inline void skb_tc_reinsert(struct sk_buff *skb, struct tcf_result *res) |
1313 | { | |
1314 | struct gnet_stats_queue *stats = res->qstats; | |
1315 | int ret; | |
1316 | ||
1317 | if (res->ingress) | |
1318 | ret = netif_receive_skb(skb); | |
1319 | else | |
1320 | ret = dev_queue_xmit(skb); | |
1321 | if (ret && stats) | |
1322 | qstats_overlimit_inc(res->qstats); | |
1323 | } | |
1324 | ||
1da177e4 | 1325 | #endif |