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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; | |
d58e468b | 22 | struct bpf_flow_keys; |
1da177e4 | 23 | |
e56185c7 JH |
24 | typedef int tc_setup_cb_t(enum tc_setup_type type, |
25 | void *type_data, void *cb_priv); | |
26 | ||
7f76fa36 JH |
27 | typedef int tc_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv, |
28 | enum tc_setup_type type, void *type_data); | |
29 | ||
fd2c3ef7 | 30 | struct qdisc_rate_table { |
1da177e4 LT |
31 | struct tc_ratespec rate; |
32 | u32 data[256]; | |
33 | struct qdisc_rate_table *next; | |
34 | int refcnt; | |
35 | }; | |
36 | ||
fd2c3ef7 | 37 | enum qdisc_state_t { |
37437bb2 | 38 | __QDISC_STATE_SCHED, |
a9312ae8 | 39 | __QDISC_STATE_DEACTIVATED, |
e2627c8c DM |
40 | }; |
41 | ||
175f9c1b | 42 | struct qdisc_size_table { |
a2da570d | 43 | struct rcu_head rcu; |
175f9c1b JK |
44 | struct list_head list; |
45 | struct tc_sizespec szopts; | |
46 | int refcnt; | |
47 | u16 data[]; | |
48 | }; | |
49 | ||
48da34b7 FW |
50 | /* similar to sk_buff_head, but skb->prev pointer is undefined. */ |
51 | struct qdisc_skb_head { | |
52 | struct sk_buff *head; | |
53 | struct sk_buff *tail; | |
54 | __u32 qlen; | |
55 | spinlock_t lock; | |
56 | }; | |
57 | ||
fd2c3ef7 | 58 | struct Qdisc { |
520ac30f ED |
59 | int (*enqueue)(struct sk_buff *skb, |
60 | struct Qdisc *sch, | |
61 | struct sk_buff **to_free); | |
62 | struct sk_buff * (*dequeue)(struct Qdisc *sch); | |
05bdd2f1 | 63 | unsigned int flags; |
b00355db | 64 | #define TCQ_F_BUILTIN 1 |
fd245a4a ED |
65 | #define TCQ_F_INGRESS 2 |
66 | #define TCQ_F_CAN_BYPASS 4 | |
67 | #define TCQ_F_MQROOT 8 | |
1abbe139 ED |
68 | #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for |
69 | * q->dev_queue : It can test | |
70 | * netif_xmit_frozen_or_stopped() before | |
71 | * dequeueing next packet. | |
72 | * Its true for MQ/MQPRIO slaves, or non | |
73 | * multiqueue device. | |
74 | */ | |
b00355db | 75 | #define TCQ_F_WARN_NONWC (1 << 16) |
22e0f8b9 | 76 | #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */ |
4eaf3b84 ED |
77 | #define TCQ_F_NOPARENT 0x40 /* root of its hierarchy : |
78 | * qdisc_tree_decrease_qlen() should stop. | |
79 | */ | |
49b49971 | 80 | #define TCQ_F_INVISIBLE 0x80 /* invisible by default in dump */ |
6b3ba914 | 81 | #define TCQ_F_NOLOCK 0x100 /* qdisc does not require locking */ |
7a4fa291 | 82 | #define TCQ_F_OFFLOADED 0x200 /* qdisc is offloaded to HW */ |
45203a3b | 83 | u32 limit; |
05bdd2f1 | 84 | const struct Qdisc_ops *ops; |
a2da570d | 85 | struct qdisc_size_table __rcu *stab; |
59cc1f61 | 86 | struct hlist_node hash; |
1da177e4 LT |
87 | u32 handle; |
88 | u32 parent; | |
72b25a91 | 89 | |
5e140dfc | 90 | struct netdev_queue *dev_queue; |
5e140dfc | 91 | |
1c0d32fd | 92 | struct net_rate_estimator __rcu *rate_est; |
0d32ef8c ED |
93 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
94 | struct gnet_stats_queue __percpu *cpu_qstats; | |
e9be0e99 PA |
95 | int padded; |
96 | refcount_t refcnt; | |
0d32ef8c | 97 | |
5e140dfc ED |
98 | /* |
99 | * For performance sake on SMP, we put highly modified fields at the end | |
100 | */ | |
a53851e2 | 101 | struct sk_buff_head gso_skb ____cacheline_aligned_in_smp; |
48da34b7 | 102 | struct qdisc_skb_head q; |
0d32ef8c | 103 | struct gnet_stats_basic_packed bstats; |
f9eb8aea | 104 | seqcount_t running; |
0d32ef8c | 105 | struct gnet_stats_queue qstats; |
4d202a0d ED |
106 | unsigned long state; |
107 | struct Qdisc *next_sched; | |
70e57d5e | 108 | struct sk_buff_head skb_bad_txq; |
45203a3b ED |
109 | |
110 | spinlock_t busylock ____cacheline_aligned_in_smp; | |
96009c7d | 111 | spinlock_t seqlock; |
3a7d0d07 | 112 | struct rcu_head rcu; |
1da177e4 LT |
113 | }; |
114 | ||
551143d8 ED |
115 | static inline void qdisc_refcount_inc(struct Qdisc *qdisc) |
116 | { | |
117 | if (qdisc->flags & TCQ_F_BUILTIN) | |
118 | return; | |
119 | refcount_inc(&qdisc->refcnt); | |
120 | } | |
121 | ||
9d7e82ce VB |
122 | /* Intended to be used by unlocked users, when concurrent qdisc release is |
123 | * possible. | |
124 | */ | |
125 | ||
126 | static inline struct Qdisc *qdisc_refcount_inc_nz(struct Qdisc *qdisc) | |
127 | { | |
128 | if (qdisc->flags & TCQ_F_BUILTIN) | |
129 | return qdisc; | |
130 | if (refcount_inc_not_zero(&qdisc->refcnt)) | |
131 | return qdisc; | |
132 | return NULL; | |
133 | } | |
134 | ||
96009c7d | 135 | static inline bool qdisc_is_running(struct Qdisc *qdisc) |
bc135b23 | 136 | { |
32f7b44d | 137 | if (qdisc->flags & TCQ_F_NOLOCK) |
96009c7d | 138 | return spin_is_locked(&qdisc->seqlock); |
f9eb8aea | 139 | return (raw_read_seqcount(&qdisc->running) & 1) ? true : false; |
bc135b23 ED |
140 | } |
141 | ||
142 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) | |
143 | { | |
32f7b44d | 144 | if (qdisc->flags & TCQ_F_NOLOCK) { |
96009c7d | 145 | if (!spin_trylock(&qdisc->seqlock)) |
32f7b44d PA |
146 | return false; |
147 | } else if (qdisc_is_running(qdisc)) { | |
fd245a4a | 148 | return false; |
32f7b44d | 149 | } |
52fbb290 ED |
150 | /* Variant of write_seqcount_begin() telling lockdep a trylock |
151 | * was attempted. | |
152 | */ | |
153 | raw_write_seqcount_begin(&qdisc->running); | |
154 | seqcount_acquire(&qdisc->running.dep_map, 0, 1, _RET_IP_); | |
fd245a4a | 155 | return true; |
bc135b23 ED |
156 | } |
157 | ||
158 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
159 | { | |
f9eb8aea | 160 | write_seqcount_end(&qdisc->running); |
32f7b44d | 161 | if (qdisc->flags & TCQ_F_NOLOCK) |
96009c7d | 162 | spin_unlock(&qdisc->seqlock); |
fd245a4a ED |
163 | } |
164 | ||
5772e9a3 JDB |
165 | static inline bool qdisc_may_bulk(const struct Qdisc *qdisc) |
166 | { | |
167 | return qdisc->flags & TCQ_F_ONETXQUEUE; | |
168 | } | |
169 | ||
170 | static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq) | |
171 | { | |
172 | #ifdef CONFIG_BQL | |
173 | /* Non-BQL migrated drivers will return 0, too. */ | |
174 | return dql_avail(&txq->dql); | |
175 | #else | |
176 | return 0; | |
177 | #endif | |
178 | } | |
179 | ||
fd2c3ef7 | 180 | struct Qdisc_class_ops { |
1da177e4 | 181 | /* Child qdisc manipulation */ |
926e61b7 | 182 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 | 183 | int (*graft)(struct Qdisc *, unsigned long cl, |
653d6fd6 AA |
184 | struct Qdisc *, struct Qdisc **, |
185 | struct netlink_ext_ack *extack); | |
1da177e4 | 186 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); |
43effa1e | 187 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
188 | |
189 | /* Class manipulation routines */ | |
143976ce | 190 | unsigned long (*find)(struct Qdisc *, u32 classid); |
1da177e4 | 191 | int (*change)(struct Qdisc *, u32, u32, |
793d81d6 AA |
192 | struct nlattr **, unsigned long *, |
193 | struct netlink_ext_ack *); | |
1da177e4 LT |
194 | int (*delete)(struct Qdisc *, unsigned long); |
195 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
196 | ||
197 | /* Filter manipulation */ | |
0ac4bd68 | 198 | struct tcf_block * (*tcf_block)(struct Qdisc *sch, |
cbaacc4e AA |
199 | unsigned long arg, |
200 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
201 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
202 | u32 classid); | |
203 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
204 | ||
205 | /* rtnetlink specific */ | |
206 | int (*dump)(struct Qdisc *, unsigned long, | |
207 | struct sk_buff *skb, struct tcmsg*); | |
208 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
209 | struct gnet_dump *); | |
210 | }; | |
211 | ||
fd2c3ef7 | 212 | struct Qdisc_ops { |
1da177e4 | 213 | struct Qdisc_ops *next; |
20fea08b | 214 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
215 | char id[IFNAMSIZ]; |
216 | int priv_size; | |
d59f5ffa | 217 | unsigned int static_flags; |
1da177e4 | 218 | |
520ac30f ED |
219 | int (*enqueue)(struct sk_buff *skb, |
220 | struct Qdisc *sch, | |
221 | struct sk_buff **to_free); | |
1da177e4 | 222 | struct sk_buff * (*dequeue)(struct Qdisc *); |
90d841fd | 223 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 | 224 | |
e63d7dfd AA |
225 | int (*init)(struct Qdisc *sch, struct nlattr *arg, |
226 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
227 | void (*reset)(struct Qdisc *); |
228 | void (*destroy)(struct Qdisc *); | |
0ac4bd68 | 229 | int (*change)(struct Qdisc *sch, |
2030721c AA |
230 | struct nlattr *arg, |
231 | struct netlink_ext_ack *extack); | |
0ac4bd68 | 232 | void (*attach)(struct Qdisc *sch); |
48bfd55e | 233 | int (*change_tx_queue_len)(struct Qdisc *, unsigned int); |
1da177e4 LT |
234 | |
235 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
236 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
237 | ||
d47a6b0e JP |
238 | void (*ingress_block_set)(struct Qdisc *sch, |
239 | u32 block_index); | |
240 | void (*egress_block_set)(struct Qdisc *sch, | |
241 | u32 block_index); | |
242 | u32 (*ingress_block_get)(struct Qdisc *sch); | |
243 | u32 (*egress_block_get)(struct Qdisc *sch); | |
244 | ||
1da177e4 LT |
245 | struct module *owner; |
246 | }; | |
247 | ||
248 | ||
fd2c3ef7 | 249 | struct tcf_result { |
db50514f JP |
250 | union { |
251 | struct { | |
252 | unsigned long class; | |
253 | u32 classid; | |
254 | }; | |
255 | const struct tcf_proto *goto_tp; | |
cd11b164 PA |
256 | |
257 | /* used by the TC_ACT_REINSERT action */ | |
258 | struct { | |
259 | bool ingress; | |
260 | struct gnet_stats_queue *qstats; | |
261 | }; | |
db50514f | 262 | }; |
1da177e4 LT |
263 | }; |
264 | ||
9f407f17 JP |
265 | struct tcf_chain; |
266 | ||
fd2c3ef7 | 267 | struct tcf_proto_ops { |
36272874 | 268 | struct list_head head; |
1da177e4 LT |
269 | char kind[IFNAMSIZ]; |
270 | ||
dc7f9f6e ED |
271 | int (*classify)(struct sk_buff *, |
272 | const struct tcf_proto *, | |
273 | struct tcf_result *); | |
1da177e4 | 274 | int (*init)(struct tcf_proto*); |
715df5ec JK |
275 | void (*destroy)(struct tcf_proto *tp, |
276 | struct netlink_ext_ack *extack); | |
1da177e4 | 277 | |
8113c095 | 278 | void* (*get)(struct tcf_proto*, u32 handle); |
c1b52739 | 279 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 280 | struct tcf_proto*, unsigned long, |
add93b61 | 281 | u32 handle, struct nlattr **, |
7306db38 AA |
282 | void **, bool, |
283 | struct netlink_ext_ack *); | |
8865fdd4 | 284 | int (*delete)(struct tcf_proto *tp, void *arg, |
571acf21 AA |
285 | bool *last, |
286 | struct netlink_ext_ack *); | |
1da177e4 | 287 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); |
e56185c7 JH |
288 | int (*reoffload)(struct tcf_proto *tp, bool add, |
289 | tc_setup_cb_t *cb, void *cb_priv, | |
290 | struct netlink_ext_ack *extack); | |
07d79fc7 | 291 | void (*bind_class)(void *, u32, unsigned long); |
9f407f17 JP |
292 | void * (*tmplt_create)(struct net *net, |
293 | struct tcf_chain *chain, | |
294 | struct nlattr **tca, | |
295 | struct netlink_ext_ack *extack); | |
296 | void (*tmplt_destroy)(void *tmplt_priv); | |
1da177e4 LT |
297 | |
298 | /* rtnetlink specific */ | |
8113c095 | 299 | int (*dump)(struct net*, struct tcf_proto*, void *, |
1da177e4 | 300 | struct sk_buff *skb, struct tcmsg*); |
9f407f17 JP |
301 | int (*tmplt_dump)(struct sk_buff *skb, |
302 | struct net *net, | |
303 | void *tmplt_priv); | |
1da177e4 LT |
304 | |
305 | struct module *owner; | |
306 | }; | |
307 | ||
fd2c3ef7 | 308 | struct tcf_proto { |
1da177e4 | 309 | /* Fast access part */ |
25d8c0d5 JF |
310 | struct tcf_proto __rcu *next; |
311 | void __rcu *root; | |
7fd4b288 PA |
312 | |
313 | /* called under RCU BH lock*/ | |
dc7f9f6e ED |
314 | int (*classify)(struct sk_buff *, |
315 | const struct tcf_proto *, | |
316 | struct tcf_result *); | |
66c6f529 | 317 | __be16 protocol; |
1da177e4 LT |
318 | |
319 | /* All the rest */ | |
320 | u32 prio; | |
1da177e4 | 321 | void *data; |
dc7f9f6e | 322 | const struct tcf_proto_ops *ops; |
5bc17018 | 323 | struct tcf_chain *chain; |
25d8c0d5 | 324 | struct rcu_head rcu; |
1da177e4 LT |
325 | }; |
326 | ||
175f9c1b | 327 | struct qdisc_skb_cb { |
d58e468b PP |
328 | union { |
329 | struct { | |
330 | unsigned int pkt_len; | |
331 | u16 slave_dev_queue_mapping; | |
332 | u16 tc_classid; | |
333 | }; | |
334 | struct bpf_flow_keys *flow_keys; | |
335 | }; | |
25711786 ED |
336 | #define QDISC_CB_PRIV_LEN 20 |
337 | unsigned char data[QDISC_CB_PRIV_LEN]; | |
175f9c1b JK |
338 | }; |
339 | ||
c7eb7d72 JP |
340 | typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv); |
341 | ||
2190d1d0 JP |
342 | struct tcf_chain { |
343 | struct tcf_proto __rcu *filter_chain; | |
5bc17018 JP |
344 | struct list_head list; |
345 | struct tcf_block *block; | |
346 | u32 index; /* chain index */ | |
347 | unsigned int refcnt; | |
1f3ed383 | 348 | unsigned int action_refcnt; |
32a4f5ec | 349 | bool explicitly_created; |
9f407f17 JP |
350 | const struct tcf_proto_ops *tmplt_ops; |
351 | void *tmplt_priv; | |
6529eaba JP |
352 | }; |
353 | ||
2190d1d0 | 354 | struct tcf_block { |
5bc17018 | 355 | struct list_head chain_list; |
48617387 | 356 | u32 index; /* block index for shared blocks */ |
cfebd7e2 | 357 | refcount_t refcnt; |
855319be | 358 | struct net *net; |
69d78ef2 | 359 | struct Qdisc *q; |
acb67442 | 360 | struct list_head cb_list; |
f36fe1c4 JP |
361 | struct list_head owner_list; |
362 | bool keep_dst; | |
caa72601 JP |
363 | unsigned int offloadcnt; /* Number of oddloaded filters */ |
364 | unsigned int nooffloaddevcnt; /* Number of devs unable to do offload */ | |
f71e0ca4 JP |
365 | struct { |
366 | struct tcf_chain *chain; | |
367 | struct list_head filter_chain_list; | |
368 | } chain0; | |
0607e439 | 369 | struct rcu_head rcu; |
2190d1d0 JP |
370 | }; |
371 | ||
caa72601 JP |
372 | static inline void tcf_block_offload_inc(struct tcf_block *block, u32 *flags) |
373 | { | |
374 | if (*flags & TCA_CLS_FLAGS_IN_HW) | |
375 | return; | |
376 | *flags |= TCA_CLS_FLAGS_IN_HW; | |
377 | block->offloadcnt++; | |
378 | } | |
379 | ||
380 | static inline void tcf_block_offload_dec(struct tcf_block *block, u32 *flags) | |
381 | { | |
382 | if (!(*flags & TCA_CLS_FLAGS_IN_HW)) | |
383 | return; | |
384 | *flags &= ~TCA_CLS_FLAGS_IN_HW; | |
385 | block->offloadcnt--; | |
386 | } | |
387 | ||
31533cba | 388 | static inline void |
86c55361 | 389 | tc_cls_offload_cnt_update(struct tcf_block *block, u32 *cnt, |
31533cba JH |
390 | u32 *flags, bool add) |
391 | { | |
392 | if (add) { | |
393 | if (!*cnt) | |
394 | tcf_block_offload_inc(block, flags); | |
395 | (*cnt)++; | |
396 | } else { | |
397 | (*cnt)--; | |
398 | if (!*cnt) | |
399 | tcf_block_offload_dec(block, flags); | |
400 | } | |
401 | } | |
402 | ||
16bda13d DM |
403 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
404 | { | |
405 | struct qdisc_skb_cb *qcb; | |
5ee31c68 ED |
406 | |
407 | BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); | |
16bda13d DM |
408 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
409 | } | |
410 | ||
7e66016f JF |
411 | static inline int qdisc_qlen_cpu(const struct Qdisc *q) |
412 | { | |
413 | return this_cpu_ptr(q->cpu_qstats)->qlen; | |
414 | } | |
415 | ||
05bdd2f1 | 416 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
417 | { |
418 | return q->q.qlen; | |
419 | } | |
420 | ||
7e66016f JF |
421 | static inline int qdisc_qlen_sum(const struct Qdisc *q) |
422 | { | |
6172abc1 | 423 | __u32 qlen = q->qstats.qlen; |
7e66016f JF |
424 | int i; |
425 | ||
426 | if (q->flags & TCQ_F_NOLOCK) { | |
427 | for_each_possible_cpu(i) | |
428 | qlen += per_cpu_ptr(q->cpu_qstats, i)->qlen; | |
429 | } else { | |
6172abc1 | 430 | qlen += q->q.qlen; |
7e66016f JF |
431 | } |
432 | ||
433 | return qlen; | |
434 | } | |
435 | ||
bfe0d029 | 436 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
437 | { |
438 | return (struct qdisc_skb_cb *)skb->cb; | |
439 | } | |
440 | ||
83874000 DM |
441 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
442 | { | |
443 | return &qdisc->q.lock; | |
444 | } | |
445 | ||
05bdd2f1 | 446 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc | 447 | { |
46e5da40 JF |
448 | struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc); |
449 | ||
450 | return q; | |
7698b4fc DM |
451 | } |
452 | ||
05bdd2f1 | 453 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
454 | { |
455 | return qdisc->dev_queue->qdisc_sleeping; | |
456 | } | |
457 | ||
7e43f112 DM |
458 | /* The qdisc root lock is a mechanism by which to top level |
459 | * of a qdisc tree can be locked from any qdisc node in the | |
460 | * forest. This allows changing the configuration of some | |
461 | * aspect of the qdisc tree while blocking out asynchronous | |
462 | * qdisc access in the packet processing paths. | |
463 | * | |
464 | * It is only legal to do this when the root will not change | |
465 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
466 | * root. This is enforced by holding the RTNL semaphore, which | |
467 | * all users of this lock accessor must do. | |
468 | */ | |
05bdd2f1 | 469 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
470 | { |
471 | struct Qdisc *root = qdisc_root(qdisc); | |
472 | ||
7e43f112 | 473 | ASSERT_RTNL(); |
83874000 | 474 | return qdisc_lock(root); |
7698b4fc DM |
475 | } |
476 | ||
05bdd2f1 | 477 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
478 | { |
479 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
480 | ||
481 | ASSERT_RTNL(); | |
482 | return qdisc_lock(root); | |
483 | } | |
484 | ||
edb09eb1 ED |
485 | static inline seqcount_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc) |
486 | { | |
487 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
488 | ||
489 | ASSERT_RTNL(); | |
490 | return &root->running; | |
491 | } | |
492 | ||
05bdd2f1 | 493 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
494 | { |
495 | return qdisc->dev_queue->dev; | |
496 | } | |
1da177e4 | 497 | |
05bdd2f1 | 498 | static inline void sch_tree_lock(const struct Qdisc *q) |
78a5b30b | 499 | { |
fe439dd0 | 500 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
501 | } |
502 | ||
05bdd2f1 | 503 | static inline void sch_tree_unlock(const struct Qdisc *q) |
78a5b30b | 504 | { |
fe439dd0 | 505 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
506 | } |
507 | ||
e41a33e6 TG |
508 | extern struct Qdisc noop_qdisc; |
509 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
510 | extern struct Qdisc_ops pfifo_fast_ops; |
511 | extern struct Qdisc_ops mq_qdisc_ops; | |
d66d6c31 | 512 | extern struct Qdisc_ops noqueue_qdisc_ops; |
6da7c8fc | 513 | extern const struct Qdisc_ops *default_qdisc_ops; |
1f27cde3 ED |
514 | static inline const struct Qdisc_ops * |
515 | get_default_qdisc_ops(const struct net_device *dev, int ntx) | |
516 | { | |
517 | return ntx < dev->real_num_tx_queues ? | |
518 | default_qdisc_ops : &pfifo_fast_ops; | |
519 | } | |
e41a33e6 | 520 | |
fd2c3ef7 | 521 | struct Qdisc_class_common { |
6fe1c7a5 PM |
522 | u32 classid; |
523 | struct hlist_node hnode; | |
524 | }; | |
525 | ||
fd2c3ef7 | 526 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
527 | struct hlist_head *hash; |
528 | unsigned int hashsize; | |
529 | unsigned int hashmask; | |
530 | unsigned int hashelems; | |
531 | }; | |
532 | ||
533 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
534 | { | |
535 | id ^= id >> 8; | |
536 | id ^= id >> 4; | |
537 | return id & mask; | |
538 | } | |
539 | ||
540 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 541 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
542 | { |
543 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
544 | unsigned int h; |
545 | ||
7d3f0cd4 GF |
546 | if (!id) |
547 | return NULL; | |
548 | ||
6fe1c7a5 | 549 | h = qdisc_class_hash(id, hash->hashmask); |
b67bfe0d | 550 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
551 | if (cl->classid == id) |
552 | return cl; | |
553 | } | |
554 | return NULL; | |
555 | } | |
556 | ||
384c181e AN |
557 | static inline int tc_classid_to_hwtc(struct net_device *dev, u32 classid) |
558 | { | |
559 | u32 hwtc = TC_H_MIN(classid) - TC_H_MIN_PRIORITY; | |
560 | ||
561 | return (hwtc < netdev_get_num_tc(dev)) ? hwtc : -EINVAL; | |
562 | } | |
563 | ||
5c15257f JP |
564 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
565 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, | |
566 | struct Qdisc_class_common *); | |
567 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, | |
568 | struct Qdisc_class_common *); | |
569 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
570 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
571 | ||
48bfd55e | 572 | int dev_qdisc_change_tx_queue_len(struct net_device *dev); |
5c15257f JP |
573 | void dev_init_scheduler(struct net_device *dev); |
574 | void dev_shutdown(struct net_device *dev); | |
575 | void dev_activate(struct net_device *dev); | |
576 | void dev_deactivate(struct net_device *dev); | |
577 | void dev_deactivate_many(struct list_head *head); | |
578 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, | |
579 | struct Qdisc *qdisc); | |
580 | void qdisc_reset(struct Qdisc *qdisc); | |
86bd446b | 581 | void qdisc_put(struct Qdisc *qdisc); |
3a7d0d07 | 582 | void qdisc_put_unlocked(struct Qdisc *qdisc); |
5f2939d9 | 583 | void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, int n, int len); |
b592843c JK |
584 | #ifdef CONFIG_NET_SCHED |
585 | int qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type, | |
586 | void *type_data); | |
bfaee911 JK |
587 | void qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch, |
588 | struct Qdisc *new, struct Qdisc *old, | |
589 | enum tc_setup_type type, void *type_data, | |
590 | struct netlink_ext_ack *extack); | |
b592843c JK |
591 | #else |
592 | static inline int | |
593 | qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type, | |
594 | void *type_data) | |
595 | { | |
596 | q->flags &= ~TCQ_F_OFFLOADED; | |
597 | return 0; | |
598 | } | |
bfaee911 JK |
599 | |
600 | static inline void | |
601 | qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch, | |
602 | struct Qdisc *new, struct Qdisc *old, | |
603 | enum tc_setup_type type, void *type_data, | |
604 | struct netlink_ext_ack *extack) | |
605 | { | |
606 | } | |
b592843c | 607 | #endif |
5c15257f | 608 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
d0bd684d AA |
609 | const struct Qdisc_ops *ops, |
610 | struct netlink_ext_ack *extack); | |
81d947e2 | 611 | void qdisc_free(struct Qdisc *qdisc); |
5c15257f | 612 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
a38a9882 AA |
613 | const struct Qdisc_ops *ops, u32 parentid, |
614 | struct netlink_ext_ack *extack); | |
5c15257f JP |
615 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
616 | const struct qdisc_size_table *stab); | |
27b29f63 | 617 | int skb_do_redirect(struct sk_buff *); |
1da177e4 | 618 | |
a5135bcf WB |
619 | static inline void skb_reset_tc(struct sk_buff *skb) |
620 | { | |
621 | #ifdef CONFIG_NET_CLS_ACT | |
bc31c905 | 622 | skb->tc_redirected = 0; |
a5135bcf WB |
623 | #endif |
624 | } | |
625 | ||
cd11b164 PA |
626 | static inline bool skb_is_tc_redirected(const struct sk_buff *skb) |
627 | { | |
628 | #ifdef CONFIG_NET_CLS_ACT | |
629 | return skb->tc_redirected; | |
630 | #else | |
631 | return false; | |
632 | #endif | |
633 | } | |
634 | ||
fdc5432a DB |
635 | static inline bool skb_at_tc_ingress(const struct sk_buff *skb) |
636 | { | |
637 | #ifdef CONFIG_NET_CLS_ACT | |
8dc07fdb | 638 | return skb->tc_at_ingress; |
fdc5432a DB |
639 | #else |
640 | return false; | |
641 | #endif | |
642 | } | |
643 | ||
e7246e12 WB |
644 | static inline bool skb_skip_tc_classify(struct sk_buff *skb) |
645 | { | |
646 | #ifdef CONFIG_NET_CLS_ACT | |
647 | if (skb->tc_skip_classify) { | |
648 | skb->tc_skip_classify = 0; | |
649 | return true; | |
650 | } | |
651 | #endif | |
652 | return false; | |
653 | } | |
654 | ||
3a053b1a | 655 | /* Reset all TX qdiscs greater than index of a device. */ |
f0796d5c | 656 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) |
5aa70995 | 657 | { |
4ef6acff JF |
658 | struct Qdisc *qdisc; |
659 | ||
f0796d5c | 660 | for (; i < dev->num_tx_queues; i++) { |
46e5da40 | 661 | qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc); |
4ef6acff JF |
662 | if (qdisc) { |
663 | spin_lock_bh(qdisc_lock(qdisc)); | |
664 | qdisc_reset(qdisc); | |
665 | spin_unlock_bh(qdisc_lock(qdisc)); | |
666 | } | |
667 | } | |
5aa70995 DM |
668 | } |
669 | ||
5aa70995 DM |
670 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
671 | { | |
f0796d5c | 672 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
673 | } |
674 | ||
3e745dd6 DM |
675 | /* Are all TX queues of the device empty? */ |
676 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
677 | { | |
e8a0464c | 678 | unsigned int i; |
46e5da40 JF |
679 | |
680 | rcu_read_lock(); | |
e8a0464c DM |
681 | for (i = 0; i < dev->num_tx_queues; i++) { |
682 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 683 | const struct Qdisc *q = rcu_dereference(txq->qdisc); |
3e745dd6 | 684 | |
46e5da40 JF |
685 | if (q->q.qlen) { |
686 | rcu_read_unlock(); | |
e8a0464c | 687 | return false; |
46e5da40 | 688 | } |
e8a0464c | 689 | } |
46e5da40 | 690 | rcu_read_unlock(); |
e8a0464c | 691 | return true; |
3e745dd6 DM |
692 | } |
693 | ||
6fa9864b | 694 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 695 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 696 | { |
e8a0464c | 697 | unsigned int i; |
46e5da40 | 698 | |
e8a0464c DM |
699 | for (i = 0; i < dev->num_tx_queues; i++) { |
700 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 701 | if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping) |
e8a0464c DM |
702 | return true; |
703 | } | |
704 | return false; | |
6fa9864b DM |
705 | } |
706 | ||
e8a0464c | 707 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
708 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
709 | { | |
e8a0464c | 710 | unsigned int i; |
46e5da40 | 711 | |
e8a0464c DM |
712 | for (i = 0; i < dev->num_tx_queues; i++) { |
713 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 714 | if (rcu_access_pointer(txq->qdisc) != &noop_qdisc) |
e8a0464c DM |
715 | return false; |
716 | } | |
717 | return true; | |
05297949 DM |
718 | } |
719 | ||
bfe0d029 | 720 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 721 | { |
175f9c1b | 722 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
723 | } |
724 | ||
c27f339a | 725 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
726 | enum net_xmit_qdisc_t { |
727 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 728 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
729 | }; |
730 | ||
c27f339a | 731 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 732 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
733 | #else |
734 | #define net_xmit_drop_count(e) (1) | |
735 | #endif | |
736 | ||
a2da570d ED |
737 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
738 | const struct Qdisc *sch) | |
5f86173b | 739 | { |
3a682fbd | 740 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
741 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
742 | ||
743 | if (stab) | |
744 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 745 | #endif |
a2da570d ED |
746 | } |
747 | ||
520ac30f ED |
748 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
749 | struct sk_buff **to_free) | |
a2da570d ED |
750 | { |
751 | qdisc_calculate_pkt_len(skb, sch); | |
520ac30f | 752 | return sch->enqueue(skb, sch, to_free); |
5f86173b JK |
753 | } |
754 | ||
22e0f8b9 JF |
755 | static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) |
756 | { | |
757 | return q->flags & TCQ_F_CPUSTATS; | |
758 | } | |
bfe0d029 | 759 | |
38040702 AV |
760 | static inline void _bstats_update(struct gnet_stats_basic_packed *bstats, |
761 | __u64 bytes, __u32 packets) | |
762 | { | |
763 | bstats->bytes += bytes; | |
764 | bstats->packets += packets; | |
765 | } | |
766 | ||
bfe0d029 ED |
767 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, |
768 | const struct sk_buff *skb) | |
769 | { | |
38040702 AV |
770 | _bstats_update(bstats, |
771 | qdisc_pkt_len(skb), | |
772 | skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1); | |
773 | } | |
774 | ||
775 | static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, | |
776 | __u64 bytes, __u32 packets) | |
777 | { | |
778 | u64_stats_update_begin(&bstats->syncp); | |
779 | _bstats_update(&bstats->bstats, bytes, packets); | |
780 | u64_stats_update_end(&bstats->syncp); | |
bfe0d029 ED |
781 | } |
782 | ||
24ea591d ED |
783 | static inline void bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, |
784 | const struct sk_buff *skb) | |
22e0f8b9 | 785 | { |
22e0f8b9 JF |
786 | u64_stats_update_begin(&bstats->syncp); |
787 | bstats_update(&bstats->bstats, skb); | |
788 | u64_stats_update_end(&bstats->syncp); | |
789 | } | |
790 | ||
24ea591d ED |
791 | static inline void qdisc_bstats_cpu_update(struct Qdisc *sch, |
792 | const struct sk_buff *skb) | |
793 | { | |
794 | bstats_cpu_update(this_cpu_ptr(sch->cpu_bstats), skb); | |
795 | } | |
796 | ||
bfe0d029 ED |
797 | static inline void qdisc_bstats_update(struct Qdisc *sch, |
798 | const struct sk_buff *skb) | |
bbd8a0d3 | 799 | { |
bfe0d029 | 800 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
801 | } |
802 | ||
25331d6c JF |
803 | static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch, |
804 | const struct sk_buff *skb) | |
805 | { | |
806 | sch->qstats.backlog -= qdisc_pkt_len(skb); | |
807 | } | |
808 | ||
40bd0362 JF |
809 | static inline void qdisc_qstats_cpu_backlog_dec(struct Qdisc *sch, |
810 | const struct sk_buff *skb) | |
811 | { | |
812 | this_cpu_sub(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
813 | } | |
814 | ||
25331d6c JF |
815 | static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch, |
816 | const struct sk_buff *skb) | |
817 | { | |
818 | sch->qstats.backlog += qdisc_pkt_len(skb); | |
819 | } | |
820 | ||
40bd0362 JF |
821 | static inline void qdisc_qstats_cpu_backlog_inc(struct Qdisc *sch, |
822 | const struct sk_buff *skb) | |
823 | { | |
824 | this_cpu_add(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
825 | } | |
826 | ||
827 | static inline void qdisc_qstats_cpu_qlen_inc(struct Qdisc *sch) | |
828 | { | |
829 | this_cpu_inc(sch->cpu_qstats->qlen); | |
830 | } | |
831 | ||
832 | static inline void qdisc_qstats_cpu_qlen_dec(struct Qdisc *sch) | |
833 | { | |
834 | this_cpu_dec(sch->cpu_qstats->qlen); | |
835 | } | |
836 | ||
837 | static inline void qdisc_qstats_cpu_requeues_inc(struct Qdisc *sch) | |
838 | { | |
839 | this_cpu_inc(sch->cpu_qstats->requeues); | |
840 | } | |
841 | ||
25331d6c JF |
842 | static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count) |
843 | { | |
844 | sch->qstats.drops += count; | |
845 | } | |
846 | ||
24ea591d | 847 | static inline void qstats_drop_inc(struct gnet_stats_queue *qstats) |
25331d6c | 848 | { |
24ea591d | 849 | qstats->drops++; |
25331d6c JF |
850 | } |
851 | ||
24ea591d | 852 | static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats) |
b0ab6f92 | 853 | { |
24ea591d ED |
854 | qstats->overlimits++; |
855 | } | |
b0ab6f92 | 856 | |
24ea591d ED |
857 | static inline void qdisc_qstats_drop(struct Qdisc *sch) |
858 | { | |
859 | qstats_drop_inc(&sch->qstats); | |
860 | } | |
861 | ||
862 | static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch) | |
863 | { | |
eb60a8dd | 864 | this_cpu_inc(sch->cpu_qstats->drops); |
b0ab6f92 JF |
865 | } |
866 | ||
25331d6c JF |
867 | static inline void qdisc_qstats_overlimit(struct Qdisc *sch) |
868 | { | |
869 | sch->qstats.overlimits++; | |
870 | } | |
871 | ||
48da34b7 FW |
872 | static inline void qdisc_skb_head_init(struct qdisc_skb_head *qh) |
873 | { | |
874 | qh->head = NULL; | |
875 | qh->tail = NULL; | |
876 | qh->qlen = 0; | |
877 | } | |
878 | ||
aea890b8 DM |
879 | static inline void __qdisc_enqueue_tail(struct sk_buff *skb, |
880 | struct qdisc_skb_head *qh) | |
9972b25d | 881 | { |
48da34b7 FW |
882 | struct sk_buff *last = qh->tail; |
883 | ||
884 | if (last) { | |
885 | skb->next = NULL; | |
886 | last->next = skb; | |
887 | qh->tail = skb; | |
888 | } else { | |
889 | qh->tail = skb; | |
890 | qh->head = skb; | |
891 | } | |
892 | qh->qlen++; | |
9972b25d TG |
893 | } |
894 | ||
895 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
896 | { | |
aea890b8 DM |
897 | __qdisc_enqueue_tail(skb, &sch->q); |
898 | qdisc_qstats_backlog_inc(sch, skb); | |
899 | return NET_XMIT_SUCCESS; | |
9972b25d TG |
900 | } |
901 | ||
59697730 DM |
902 | static inline void __qdisc_enqueue_head(struct sk_buff *skb, |
903 | struct qdisc_skb_head *qh) | |
904 | { | |
905 | skb->next = qh->head; | |
906 | ||
907 | if (!qh->head) | |
908 | qh->tail = skb; | |
909 | qh->head = skb; | |
910 | qh->qlen++; | |
911 | } | |
912 | ||
48da34b7 | 913 | static inline struct sk_buff *__qdisc_dequeue_head(struct qdisc_skb_head *qh) |
9972b25d | 914 | { |
48da34b7 FW |
915 | struct sk_buff *skb = qh->head; |
916 | ||
917 | if (likely(skb != NULL)) { | |
918 | qh->head = skb->next; | |
919 | qh->qlen--; | |
920 | if (qh->head == NULL) | |
921 | qh->tail = NULL; | |
922 | skb->next = NULL; | |
923 | } | |
9972b25d | 924 | |
ec323368 FW |
925 | return skb; |
926 | } | |
927 | ||
928 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
929 | { | |
930 | struct sk_buff *skb = __qdisc_dequeue_head(&sch->q); | |
931 | ||
9190b3b3 | 932 | if (likely(skb != NULL)) { |
25331d6c | 933 | qdisc_qstats_backlog_dec(sch, skb); |
9190b3b3 ED |
934 | qdisc_bstats_update(sch, skb); |
935 | } | |
9972b25d TG |
936 | |
937 | return skb; | |
938 | } | |
939 | ||
520ac30f ED |
940 | /* Instead of calling kfree_skb() while root qdisc lock is held, |
941 | * queue the skb for future freeing at end of __dev_xmit_skb() | |
942 | */ | |
943 | static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free) | |
944 | { | |
945 | skb->next = *to_free; | |
946 | *to_free = skb; | |
947 | } | |
948 | ||
35d889d1 AK |
949 | static inline void __qdisc_drop_all(struct sk_buff *skb, |
950 | struct sk_buff **to_free) | |
951 | { | |
952 | if (skb->prev) | |
953 | skb->prev->next = *to_free; | |
954 | else | |
955 | skb->next = *to_free; | |
956 | *to_free = skb; | |
957 | } | |
958 | ||
57dbb2d8 | 959 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, |
48da34b7 | 960 | struct qdisc_skb_head *qh, |
520ac30f | 961 | struct sk_buff **to_free) |
57dbb2d8 | 962 | { |
48da34b7 | 963 | struct sk_buff *skb = __qdisc_dequeue_head(qh); |
57dbb2d8 HPP |
964 | |
965 | if (likely(skb != NULL)) { | |
966 | unsigned int len = qdisc_pkt_len(skb); | |
520ac30f | 967 | |
25331d6c | 968 | qdisc_qstats_backlog_dec(sch, skb); |
520ac30f | 969 | __qdisc_drop(skb, to_free); |
57dbb2d8 HPP |
970 | return len; |
971 | } | |
972 | ||
973 | return 0; | |
974 | } | |
975 | ||
520ac30f ED |
976 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch, |
977 | struct sk_buff **to_free) | |
57dbb2d8 | 978 | { |
520ac30f | 979 | return __qdisc_queue_drop_head(sch, &sch->q, to_free); |
9972b25d TG |
980 | } |
981 | ||
48a8f519 PM |
982 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
983 | { | |
48da34b7 FW |
984 | const struct qdisc_skb_head *qh = &sch->q; |
985 | ||
986 | return qh->head; | |
48a8f519 PM |
987 | } |
988 | ||
77be155c JP |
989 | /* generic pseudo peek method for non-work-conserving qdisc */ |
990 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
991 | { | |
a53851e2 JF |
992 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
993 | ||
77be155c | 994 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ |
a53851e2 JF |
995 | if (!skb) { |
996 | skb = sch->dequeue(sch); | |
997 | ||
998 | if (skb) { | |
999 | __skb_queue_head(&sch->gso_skb, skb); | |
61c9eaf9 | 1000 | /* it's still part of the queue */ |
a53851e2 | 1001 | qdisc_qstats_backlog_inc(sch, skb); |
61c9eaf9 | 1002 | sch->q.qlen++; |
a27758ff | 1003 | } |
61c9eaf9 | 1004 | } |
77be155c | 1005 | |
a53851e2 | 1006 | return skb; |
77be155c JP |
1007 | } |
1008 | ||
1009 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
1010 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
1011 | { | |
a53851e2 | 1012 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
77be155c | 1013 | |
61c9eaf9 | 1014 | if (skb) { |
a53851e2 | 1015 | skb = __skb_dequeue(&sch->gso_skb); |
a27758ff | 1016 | qdisc_qstats_backlog_dec(sch, skb); |
61c9eaf9 JP |
1017 | sch->q.qlen--; |
1018 | } else { | |
77be155c | 1019 | skb = sch->dequeue(sch); |
61c9eaf9 | 1020 | } |
77be155c JP |
1021 | |
1022 | return skb; | |
1023 | } | |
1024 | ||
48da34b7 | 1025 | static inline void __qdisc_reset_queue(struct qdisc_skb_head *qh) |
9972b25d TG |
1026 | { |
1027 | /* | |
1028 | * We do not know the backlog in bytes of this list, it | |
1029 | * is up to the caller to correct it | |
1030 | */ | |
48da34b7 FW |
1031 | ASSERT_RTNL(); |
1032 | if (qh->qlen) { | |
1033 | rtnl_kfree_skbs(qh->head, qh->tail); | |
1034 | ||
1035 | qh->head = NULL; | |
1036 | qh->tail = NULL; | |
1037 | qh->qlen = 0; | |
1b5c5493 | 1038 | } |
9972b25d TG |
1039 | } |
1040 | ||
1041 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
1042 | { | |
1b5c5493 | 1043 | __qdisc_reset_queue(&sch->q); |
9972b25d TG |
1044 | sch->qstats.backlog = 0; |
1045 | } | |
1046 | ||
86a7996c WC |
1047 | static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, |
1048 | struct Qdisc **pold) | |
1049 | { | |
1050 | struct Qdisc *old; | |
1051 | ||
1052 | sch_tree_lock(sch); | |
1053 | old = *pold; | |
1054 | *pold = new; | |
1055 | if (old != NULL) { | |
68a66d14 KK |
1056 | unsigned int qlen = old->q.qlen; |
1057 | unsigned int backlog = old->qstats.backlog; | |
1058 | ||
86a7996c | 1059 | qdisc_reset(old); |
68a66d14 | 1060 | qdisc_tree_reduce_backlog(old, qlen, backlog); |
86a7996c WC |
1061 | } |
1062 | sch_tree_unlock(sch); | |
1063 | ||
1064 | return old; | |
1065 | } | |
1066 | ||
1b5c5493 ED |
1067 | static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) |
1068 | { | |
1069 | rtnl_kfree_skbs(skb, skb); | |
1070 | qdisc_qstats_drop(sch); | |
1071 | } | |
1072 | ||
40bd0362 JF |
1073 | static inline int qdisc_drop_cpu(struct sk_buff *skb, struct Qdisc *sch, |
1074 | struct sk_buff **to_free) | |
1075 | { | |
1076 | __qdisc_drop(skb, to_free); | |
1077 | qdisc_qstats_cpu_drop(sch); | |
1078 | ||
1079 | return NET_XMIT_DROP; | |
1080 | } | |
520ac30f ED |
1081 | |
1082 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch, | |
1083 | struct sk_buff **to_free) | |
9972b25d | 1084 | { |
520ac30f | 1085 | __qdisc_drop(skb, to_free); |
25331d6c | 1086 | qdisc_qstats_drop(sch); |
9972b25d TG |
1087 | |
1088 | return NET_XMIT_DROP; | |
1089 | } | |
1090 | ||
35d889d1 AK |
1091 | static inline int qdisc_drop_all(struct sk_buff *skb, struct Qdisc *sch, |
1092 | struct sk_buff **to_free) | |
1093 | { | |
1094 | __qdisc_drop_all(skb, to_free); | |
1095 | qdisc_qstats_drop(sch); | |
1096 | ||
1097 | return NET_XMIT_DROP; | |
1098 | } | |
1099 | ||
e9bef55d JDB |
1100 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
1101 | long it will take to send a packet given its size. | |
1102 | */ | |
1103 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
1104 | { | |
e08b0998 JDB |
1105 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
1106 | if (slot < 0) | |
1107 | slot = 0; | |
e9bef55d JDB |
1108 | slot >>= rtab->rate.cell_log; |
1109 | if (slot > 255) | |
a02cec21 | 1110 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
1111 | return rtab->data[slot]; |
1112 | } | |
1113 | ||
292f1c7f | 1114 | struct psched_ratecfg { |
130d3d68 | 1115 | u64 rate_bytes_ps; /* bytes per second */ |
01cb71d2 ED |
1116 | u32 mult; |
1117 | u16 overhead; | |
8a8e3d84 | 1118 | u8 linklayer; |
01cb71d2 | 1119 | u8 shift; |
292f1c7f JP |
1120 | }; |
1121 | ||
1122 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
1123 | unsigned int len) | |
1124 | { | |
8a8e3d84 JDB |
1125 | len += r->overhead; |
1126 | ||
1127 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) | |
1128 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
1129 | ||
1130 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
1131 | } |
1132 | ||
5c15257f | 1133 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
3e1e3aae ED |
1134 | const struct tc_ratespec *conf, |
1135 | u64 rate64); | |
292f1c7f | 1136 | |
01cb71d2 ED |
1137 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
1138 | const struct psched_ratecfg *r) | |
292f1c7f | 1139 | { |
01cb71d2 | 1140 | memset(res, 0, sizeof(*res)); |
3e1e3aae ED |
1141 | |
1142 | /* legacy struct tc_ratespec has a 32bit @rate field | |
1143 | * Qdisc using 64bit rate should add new attributes | |
1144 | * in order to maintain compatibility. | |
1145 | */ | |
1146 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); | |
1147 | ||
01cb71d2 | 1148 | res->overhead = r->overhead; |
8a8e3d84 | 1149 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
1150 | } |
1151 | ||
46209401 JP |
1152 | /* Mini Qdisc serves for specific needs of ingress/clsact Qdisc. |
1153 | * The fast path only needs to access filter list and to update stats | |
1154 | */ | |
1155 | struct mini_Qdisc { | |
1156 | struct tcf_proto *filter_list; | |
1157 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; | |
1158 | struct gnet_stats_queue __percpu *cpu_qstats; | |
1159 | struct rcu_head rcu; | |
1160 | }; | |
1161 | ||
1162 | static inline void mini_qdisc_bstats_cpu_update(struct mini_Qdisc *miniq, | |
1163 | const struct sk_buff *skb) | |
1164 | { | |
1165 | bstats_cpu_update(this_cpu_ptr(miniq->cpu_bstats), skb); | |
1166 | } | |
1167 | ||
1168 | static inline void mini_qdisc_qstats_cpu_drop(struct mini_Qdisc *miniq) | |
1169 | { | |
1170 | this_cpu_inc(miniq->cpu_qstats->drops); | |
1171 | } | |
1172 | ||
1173 | struct mini_Qdisc_pair { | |
1174 | struct mini_Qdisc miniq1; | |
1175 | struct mini_Qdisc miniq2; | |
1176 | struct mini_Qdisc __rcu **p_miniq; | |
1177 | }; | |
1178 | ||
1179 | void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp, | |
1180 | struct tcf_proto *tp_head); | |
1181 | void mini_qdisc_pair_init(struct mini_Qdisc_pair *miniqp, struct Qdisc *qdisc, | |
1182 | struct mini_Qdisc __rcu **p_miniq); | |
1183 | ||
cd11b164 PA |
1184 | static inline void skb_tc_reinsert(struct sk_buff *skb, struct tcf_result *res) |
1185 | { | |
1186 | struct gnet_stats_queue *stats = res->qstats; | |
1187 | int ret; | |
1188 | ||
1189 | if (res->ingress) | |
1190 | ret = netif_receive_skb(skb); | |
1191 | else | |
1192 | ret = dev_queue_xmit(skb); | |
1193 | if (ret && stats) | |
1194 | qstats_overlimit_inc(res->qstats); | |
1195 | } | |
1196 | ||
1da177e4 | 1197 | #endif |