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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __NET_SCHED_GENERIC_H |
3 | #define __NET_SCHED_GENERIC_H | |
4 | ||
1da177e4 LT |
5 | #include <linux/netdevice.h> |
6 | #include <linux/types.h> | |
7 | #include <linux/rcupdate.h> | |
1da177e4 LT |
8 | #include <linux/pkt_sched.h> |
9 | #include <linux/pkt_cls.h> | |
22e0f8b9 | 10 | #include <linux/percpu.h> |
5772e9a3 | 11 | #include <linux/dynamic_queue_limits.h> |
5bc17018 | 12 | #include <linux/list.h> |
7b936405 | 13 | #include <linux/refcount.h> |
7aa0045d | 14 | #include <linux/workqueue.h> |
1da177e4 | 15 | #include <net/gen_stats.h> |
be577ddc | 16 | #include <net/rtnetlink.h> |
1da177e4 LT |
17 | |
18 | struct Qdisc_ops; | |
19 | struct qdisc_walker; | |
20 | struct tcf_walker; | |
21 | struct module; | |
22 | ||
fd2c3ef7 | 23 | struct qdisc_rate_table { |
1da177e4 LT |
24 | struct tc_ratespec rate; |
25 | u32 data[256]; | |
26 | struct qdisc_rate_table *next; | |
27 | int refcnt; | |
28 | }; | |
29 | ||
fd2c3ef7 | 30 | enum qdisc_state_t { |
37437bb2 | 31 | __QDISC_STATE_SCHED, |
a9312ae8 | 32 | __QDISC_STATE_DEACTIVATED, |
e2627c8c DM |
33 | }; |
34 | ||
175f9c1b | 35 | struct qdisc_size_table { |
a2da570d | 36 | struct rcu_head rcu; |
175f9c1b JK |
37 | struct list_head list; |
38 | struct tc_sizespec szopts; | |
39 | int refcnt; | |
40 | u16 data[]; | |
41 | }; | |
42 | ||
48da34b7 FW |
43 | /* similar to sk_buff_head, but skb->prev pointer is undefined. */ |
44 | struct qdisc_skb_head { | |
45 | struct sk_buff *head; | |
46 | struct sk_buff *tail; | |
47 | __u32 qlen; | |
48 | spinlock_t lock; | |
49 | }; | |
50 | ||
fd2c3ef7 | 51 | struct Qdisc { |
520ac30f ED |
52 | int (*enqueue)(struct sk_buff *skb, |
53 | struct Qdisc *sch, | |
54 | struct sk_buff **to_free); | |
55 | struct sk_buff * (*dequeue)(struct Qdisc *sch); | |
05bdd2f1 | 56 | unsigned int flags; |
b00355db | 57 | #define TCQ_F_BUILTIN 1 |
fd245a4a ED |
58 | #define TCQ_F_INGRESS 2 |
59 | #define TCQ_F_CAN_BYPASS 4 | |
60 | #define TCQ_F_MQROOT 8 | |
1abbe139 ED |
61 | #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for |
62 | * q->dev_queue : It can test | |
63 | * netif_xmit_frozen_or_stopped() before | |
64 | * dequeueing next packet. | |
65 | * Its true for MQ/MQPRIO slaves, or non | |
66 | * multiqueue device. | |
67 | */ | |
b00355db | 68 | #define TCQ_F_WARN_NONWC (1 << 16) |
22e0f8b9 | 69 | #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */ |
4eaf3b84 ED |
70 | #define TCQ_F_NOPARENT 0x40 /* root of its hierarchy : |
71 | * qdisc_tree_decrease_qlen() should stop. | |
72 | */ | |
49b49971 | 73 | #define TCQ_F_INVISIBLE 0x80 /* invisible by default in dump */ |
6b3ba914 | 74 | #define TCQ_F_NOLOCK 0x100 /* qdisc does not require locking */ |
7a4fa291 | 75 | #define TCQ_F_OFFLOADED 0x200 /* qdisc is offloaded to HW */ |
45203a3b | 76 | u32 limit; |
05bdd2f1 | 77 | const struct Qdisc_ops *ops; |
a2da570d | 78 | struct qdisc_size_table __rcu *stab; |
59cc1f61 | 79 | struct hlist_node hash; |
1da177e4 LT |
80 | u32 handle; |
81 | u32 parent; | |
72b25a91 | 82 | |
5e140dfc | 83 | struct netdev_queue *dev_queue; |
5e140dfc | 84 | |
1c0d32fd | 85 | struct net_rate_estimator __rcu *rate_est; |
0d32ef8c ED |
86 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
87 | struct gnet_stats_queue __percpu *cpu_qstats; | |
88 | ||
5e140dfc ED |
89 | /* |
90 | * For performance sake on SMP, we put highly modified fields at the end | |
91 | */ | |
a53851e2 | 92 | struct sk_buff_head gso_skb ____cacheline_aligned_in_smp; |
48da34b7 | 93 | struct qdisc_skb_head q; |
0d32ef8c | 94 | struct gnet_stats_basic_packed bstats; |
f9eb8aea | 95 | seqcount_t running; |
0d32ef8c | 96 | struct gnet_stats_queue qstats; |
4d202a0d ED |
97 | unsigned long state; |
98 | struct Qdisc *next_sched; | |
70e57d5e | 99 | struct sk_buff_head skb_bad_txq; |
45203a3b | 100 | int padded; |
7b936405 | 101 | refcount_t refcnt; |
45203a3b ED |
102 | |
103 | spinlock_t busylock ____cacheline_aligned_in_smp; | |
1da177e4 LT |
104 | }; |
105 | ||
551143d8 ED |
106 | static inline void qdisc_refcount_inc(struct Qdisc *qdisc) |
107 | { | |
108 | if (qdisc->flags & TCQ_F_BUILTIN) | |
109 | return; | |
110 | refcount_inc(&qdisc->refcnt); | |
111 | } | |
112 | ||
fd245a4a | 113 | static inline bool qdisc_is_running(const struct Qdisc *qdisc) |
bc135b23 | 114 | { |
f9eb8aea | 115 | return (raw_read_seqcount(&qdisc->running) & 1) ? true : false; |
bc135b23 ED |
116 | } |
117 | ||
118 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) | |
119 | { | |
fd245a4a ED |
120 | if (qdisc_is_running(qdisc)) |
121 | return false; | |
52fbb290 ED |
122 | /* Variant of write_seqcount_begin() telling lockdep a trylock |
123 | * was attempted. | |
124 | */ | |
125 | raw_write_seqcount_begin(&qdisc->running); | |
126 | seqcount_acquire(&qdisc->running.dep_map, 0, 1, _RET_IP_); | |
fd245a4a | 127 | return true; |
bc135b23 ED |
128 | } |
129 | ||
130 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
131 | { | |
f9eb8aea | 132 | write_seqcount_end(&qdisc->running); |
fd245a4a ED |
133 | } |
134 | ||
5772e9a3 JDB |
135 | static inline bool qdisc_may_bulk(const struct Qdisc *qdisc) |
136 | { | |
137 | return qdisc->flags & TCQ_F_ONETXQUEUE; | |
138 | } | |
139 | ||
140 | static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq) | |
141 | { | |
142 | #ifdef CONFIG_BQL | |
143 | /* Non-BQL migrated drivers will return 0, too. */ | |
144 | return dql_avail(&txq->dql); | |
145 | #else | |
146 | return 0; | |
147 | #endif | |
148 | } | |
149 | ||
fd2c3ef7 | 150 | struct Qdisc_class_ops { |
1da177e4 | 151 | /* Child qdisc manipulation */ |
926e61b7 | 152 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 | 153 | int (*graft)(struct Qdisc *, unsigned long cl, |
653d6fd6 AA |
154 | struct Qdisc *, struct Qdisc **, |
155 | struct netlink_ext_ack *extack); | |
1da177e4 | 156 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); |
43effa1e | 157 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
158 | |
159 | /* Class manipulation routines */ | |
143976ce | 160 | unsigned long (*find)(struct Qdisc *, u32 classid); |
1da177e4 | 161 | int (*change)(struct Qdisc *, u32, u32, |
793d81d6 AA |
162 | struct nlattr **, unsigned long *, |
163 | struct netlink_ext_ack *); | |
1da177e4 LT |
164 | int (*delete)(struct Qdisc *, unsigned long); |
165 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); | |
166 | ||
167 | /* Filter manipulation */ | |
0ac4bd68 | 168 | struct tcf_block * (*tcf_block)(struct Qdisc *sch, |
cbaacc4e AA |
169 | unsigned long arg, |
170 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
171 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
172 | u32 classid); | |
173 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
174 | ||
175 | /* rtnetlink specific */ | |
176 | int (*dump)(struct Qdisc *, unsigned long, | |
177 | struct sk_buff *skb, struct tcmsg*); | |
178 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
179 | struct gnet_dump *); | |
180 | }; | |
181 | ||
fd2c3ef7 | 182 | struct Qdisc_ops { |
1da177e4 | 183 | struct Qdisc_ops *next; |
20fea08b | 184 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
185 | char id[IFNAMSIZ]; |
186 | int priv_size; | |
d59f5ffa | 187 | unsigned int static_flags; |
1da177e4 | 188 | |
520ac30f ED |
189 | int (*enqueue)(struct sk_buff *skb, |
190 | struct Qdisc *sch, | |
191 | struct sk_buff **to_free); | |
1da177e4 | 192 | struct sk_buff * (*dequeue)(struct Qdisc *); |
90d841fd | 193 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 | 194 | |
e63d7dfd AA |
195 | int (*init)(struct Qdisc *sch, struct nlattr *arg, |
196 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
197 | void (*reset)(struct Qdisc *); |
198 | void (*destroy)(struct Qdisc *); | |
0ac4bd68 | 199 | int (*change)(struct Qdisc *sch, |
2030721c AA |
200 | struct nlattr *arg, |
201 | struct netlink_ext_ack *extack); | |
0ac4bd68 | 202 | void (*attach)(struct Qdisc *sch); |
1da177e4 LT |
203 | |
204 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
205 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
206 | ||
d47a6b0e JP |
207 | void (*ingress_block_set)(struct Qdisc *sch, |
208 | u32 block_index); | |
209 | void (*egress_block_set)(struct Qdisc *sch, | |
210 | u32 block_index); | |
211 | u32 (*ingress_block_get)(struct Qdisc *sch); | |
212 | u32 (*egress_block_get)(struct Qdisc *sch); | |
213 | ||
1da177e4 LT |
214 | struct module *owner; |
215 | }; | |
216 | ||
217 | ||
fd2c3ef7 | 218 | struct tcf_result { |
db50514f JP |
219 | union { |
220 | struct { | |
221 | unsigned long class; | |
222 | u32 classid; | |
223 | }; | |
224 | const struct tcf_proto *goto_tp; | |
225 | }; | |
1da177e4 LT |
226 | }; |
227 | ||
fd2c3ef7 | 228 | struct tcf_proto_ops { |
36272874 | 229 | struct list_head head; |
1da177e4 LT |
230 | char kind[IFNAMSIZ]; |
231 | ||
dc7f9f6e ED |
232 | int (*classify)(struct sk_buff *, |
233 | const struct tcf_proto *, | |
234 | struct tcf_result *); | |
1da177e4 | 235 | int (*init)(struct tcf_proto*); |
763dbf63 | 236 | void (*destroy)(struct tcf_proto*); |
1da177e4 | 237 | |
8113c095 | 238 | void* (*get)(struct tcf_proto*, u32 handle); |
c1b52739 | 239 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 240 | struct tcf_proto*, unsigned long, |
add93b61 | 241 | u32 handle, struct nlattr **, |
7306db38 AA |
242 | void **, bool, |
243 | struct netlink_ext_ack *); | |
8865fdd4 | 244 | int (*delete)(struct tcf_proto *tp, void *arg, |
571acf21 AA |
245 | bool *last, |
246 | struct netlink_ext_ack *); | |
1da177e4 | 247 | void (*walk)(struct tcf_proto*, struct tcf_walker *arg); |
07d79fc7 | 248 | void (*bind_class)(void *, u32, unsigned long); |
1da177e4 LT |
249 | |
250 | /* rtnetlink specific */ | |
8113c095 | 251 | int (*dump)(struct net*, struct tcf_proto*, void *, |
1da177e4 LT |
252 | struct sk_buff *skb, struct tcmsg*); |
253 | ||
254 | struct module *owner; | |
255 | }; | |
256 | ||
fd2c3ef7 | 257 | struct tcf_proto { |
1da177e4 | 258 | /* Fast access part */ |
25d8c0d5 JF |
259 | struct tcf_proto __rcu *next; |
260 | void __rcu *root; | |
dc7f9f6e ED |
261 | int (*classify)(struct sk_buff *, |
262 | const struct tcf_proto *, | |
263 | struct tcf_result *); | |
66c6f529 | 264 | __be16 protocol; |
1da177e4 LT |
265 | |
266 | /* All the rest */ | |
267 | u32 prio; | |
1da177e4 | 268 | void *data; |
dc7f9f6e | 269 | const struct tcf_proto_ops *ops; |
5bc17018 | 270 | struct tcf_chain *chain; |
25d8c0d5 | 271 | struct rcu_head rcu; |
1da177e4 LT |
272 | }; |
273 | ||
175f9c1b JK |
274 | struct qdisc_skb_cb { |
275 | unsigned int pkt_len; | |
df4ab5b3 | 276 | u16 slave_dev_queue_mapping; |
045efa82 | 277 | u16 tc_classid; |
25711786 ED |
278 | #define QDISC_CB_PRIV_LEN 20 |
279 | unsigned char data[QDISC_CB_PRIV_LEN]; | |
175f9c1b JK |
280 | }; |
281 | ||
c7eb7d72 JP |
282 | typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv); |
283 | ||
2190d1d0 JP |
284 | struct tcf_chain { |
285 | struct tcf_proto __rcu *filter_chain; | |
a9b19443 | 286 | struct list_head filter_chain_list; |
5bc17018 JP |
287 | struct list_head list; |
288 | struct tcf_block *block; | |
289 | u32 index; /* chain index */ | |
290 | unsigned int refcnt; | |
6529eaba JP |
291 | }; |
292 | ||
2190d1d0 | 293 | struct tcf_block { |
5bc17018 | 294 | struct list_head chain_list; |
48617387 JP |
295 | u32 index; /* block index for shared blocks */ |
296 | unsigned int refcnt; | |
855319be | 297 | struct net *net; |
69d78ef2 | 298 | struct Qdisc *q; |
acb67442 | 299 | struct list_head cb_list; |
f36fe1c4 JP |
300 | struct list_head owner_list; |
301 | bool keep_dst; | |
caa72601 JP |
302 | unsigned int offloadcnt; /* Number of oddloaded filters */ |
303 | unsigned int nooffloaddevcnt; /* Number of devs unable to do offload */ | |
2190d1d0 JP |
304 | }; |
305 | ||
caa72601 JP |
306 | static inline void tcf_block_offload_inc(struct tcf_block *block, u32 *flags) |
307 | { | |
308 | if (*flags & TCA_CLS_FLAGS_IN_HW) | |
309 | return; | |
310 | *flags |= TCA_CLS_FLAGS_IN_HW; | |
311 | block->offloadcnt++; | |
312 | } | |
313 | ||
314 | static inline void tcf_block_offload_dec(struct tcf_block *block, u32 *flags) | |
315 | { | |
316 | if (!(*flags & TCA_CLS_FLAGS_IN_HW)) | |
317 | return; | |
318 | *flags &= ~TCA_CLS_FLAGS_IN_HW; | |
319 | block->offloadcnt--; | |
320 | } | |
321 | ||
16bda13d DM |
322 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
323 | { | |
324 | struct qdisc_skb_cb *qcb; | |
5ee31c68 ED |
325 | |
326 | BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); | |
16bda13d DM |
327 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
328 | } | |
329 | ||
7e66016f JF |
330 | static inline int qdisc_qlen_cpu(const struct Qdisc *q) |
331 | { | |
332 | return this_cpu_ptr(q->cpu_qstats)->qlen; | |
333 | } | |
334 | ||
05bdd2f1 | 335 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
336 | { |
337 | return q->q.qlen; | |
338 | } | |
339 | ||
7e66016f JF |
340 | static inline int qdisc_qlen_sum(const struct Qdisc *q) |
341 | { | |
342 | __u32 qlen = 0; | |
343 | int i; | |
344 | ||
345 | if (q->flags & TCQ_F_NOLOCK) { | |
346 | for_each_possible_cpu(i) | |
347 | qlen += per_cpu_ptr(q->cpu_qstats, i)->qlen; | |
348 | } else { | |
349 | qlen = q->q.qlen; | |
350 | } | |
351 | ||
352 | return qlen; | |
353 | } | |
354 | ||
bfe0d029 | 355 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
356 | { |
357 | return (struct qdisc_skb_cb *)skb->cb; | |
358 | } | |
359 | ||
83874000 DM |
360 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
361 | { | |
362 | return &qdisc->q.lock; | |
363 | } | |
364 | ||
05bdd2f1 | 365 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc | 366 | { |
46e5da40 JF |
367 | struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc); |
368 | ||
369 | return q; | |
7698b4fc DM |
370 | } |
371 | ||
05bdd2f1 | 372 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
373 | { |
374 | return qdisc->dev_queue->qdisc_sleeping; | |
375 | } | |
376 | ||
7e43f112 DM |
377 | /* The qdisc root lock is a mechanism by which to top level |
378 | * of a qdisc tree can be locked from any qdisc node in the | |
379 | * forest. This allows changing the configuration of some | |
380 | * aspect of the qdisc tree while blocking out asynchronous | |
381 | * qdisc access in the packet processing paths. | |
382 | * | |
383 | * It is only legal to do this when the root will not change | |
384 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
385 | * root. This is enforced by holding the RTNL semaphore, which | |
386 | * all users of this lock accessor must do. | |
387 | */ | |
05bdd2f1 | 388 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
389 | { |
390 | struct Qdisc *root = qdisc_root(qdisc); | |
391 | ||
7e43f112 | 392 | ASSERT_RTNL(); |
83874000 | 393 | return qdisc_lock(root); |
7698b4fc DM |
394 | } |
395 | ||
05bdd2f1 | 396 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
397 | { |
398 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
399 | ||
400 | ASSERT_RTNL(); | |
401 | return qdisc_lock(root); | |
402 | } | |
403 | ||
edb09eb1 ED |
404 | static inline seqcount_t *qdisc_root_sleeping_running(const struct Qdisc *qdisc) |
405 | { | |
406 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
407 | ||
408 | ASSERT_RTNL(); | |
409 | return &root->running; | |
410 | } | |
411 | ||
05bdd2f1 | 412 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
413 | { |
414 | return qdisc->dev_queue->dev; | |
415 | } | |
1da177e4 | 416 | |
05bdd2f1 | 417 | static inline void sch_tree_lock(const struct Qdisc *q) |
78a5b30b | 418 | { |
fe439dd0 | 419 | spin_lock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
420 | } |
421 | ||
05bdd2f1 | 422 | static inline void sch_tree_unlock(const struct Qdisc *q) |
78a5b30b | 423 | { |
fe439dd0 | 424 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); |
78a5b30b DM |
425 | } |
426 | ||
e41a33e6 TG |
427 | extern struct Qdisc noop_qdisc; |
428 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
429 | extern struct Qdisc_ops pfifo_fast_ops; |
430 | extern struct Qdisc_ops mq_qdisc_ops; | |
d66d6c31 | 431 | extern struct Qdisc_ops noqueue_qdisc_ops; |
6da7c8fc | 432 | extern const struct Qdisc_ops *default_qdisc_ops; |
1f27cde3 ED |
433 | static inline const struct Qdisc_ops * |
434 | get_default_qdisc_ops(const struct net_device *dev, int ntx) | |
435 | { | |
436 | return ntx < dev->real_num_tx_queues ? | |
437 | default_qdisc_ops : &pfifo_fast_ops; | |
438 | } | |
e41a33e6 | 439 | |
fd2c3ef7 | 440 | struct Qdisc_class_common { |
6fe1c7a5 PM |
441 | u32 classid; |
442 | struct hlist_node hnode; | |
443 | }; | |
444 | ||
fd2c3ef7 | 445 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
446 | struct hlist_head *hash; |
447 | unsigned int hashsize; | |
448 | unsigned int hashmask; | |
449 | unsigned int hashelems; | |
450 | }; | |
451 | ||
452 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
453 | { | |
454 | id ^= id >> 8; | |
455 | id ^= id >> 4; | |
456 | return id & mask; | |
457 | } | |
458 | ||
459 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 460 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
461 | { |
462 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
463 | unsigned int h; |
464 | ||
7d3f0cd4 GF |
465 | if (!id) |
466 | return NULL; | |
467 | ||
6fe1c7a5 | 468 | h = qdisc_class_hash(id, hash->hashmask); |
b67bfe0d | 469 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
470 | if (cl->classid == id) |
471 | return cl; | |
472 | } | |
473 | return NULL; | |
474 | } | |
475 | ||
384c181e AN |
476 | static inline int tc_classid_to_hwtc(struct net_device *dev, u32 classid) |
477 | { | |
478 | u32 hwtc = TC_H_MIN(classid) - TC_H_MIN_PRIORITY; | |
479 | ||
480 | return (hwtc < netdev_get_num_tc(dev)) ? hwtc : -EINVAL; | |
481 | } | |
482 | ||
5c15257f JP |
483 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
484 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, | |
485 | struct Qdisc_class_common *); | |
486 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, | |
487 | struct Qdisc_class_common *); | |
488 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
489 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
490 | ||
491 | void dev_init_scheduler(struct net_device *dev); | |
492 | void dev_shutdown(struct net_device *dev); | |
493 | void dev_activate(struct net_device *dev); | |
494 | void dev_deactivate(struct net_device *dev); | |
495 | void dev_deactivate_many(struct list_head *head); | |
496 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, | |
497 | struct Qdisc *qdisc); | |
498 | void qdisc_reset(struct Qdisc *qdisc); | |
499 | void qdisc_destroy(struct Qdisc *qdisc); | |
2ccccf5f WC |
500 | void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n, |
501 | unsigned int len); | |
5c15257f | 502 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
d0bd684d AA |
503 | const struct Qdisc_ops *ops, |
504 | struct netlink_ext_ack *extack); | |
81d947e2 | 505 | void qdisc_free(struct Qdisc *qdisc); |
5c15257f | 506 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
a38a9882 AA |
507 | const struct Qdisc_ops *ops, u32 parentid, |
508 | struct netlink_ext_ack *extack); | |
5c15257f JP |
509 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
510 | const struct qdisc_size_table *stab); | |
27b29f63 | 511 | int skb_do_redirect(struct sk_buff *); |
1da177e4 | 512 | |
a5135bcf WB |
513 | static inline void skb_reset_tc(struct sk_buff *skb) |
514 | { | |
515 | #ifdef CONFIG_NET_CLS_ACT | |
bc31c905 | 516 | skb->tc_redirected = 0; |
a5135bcf WB |
517 | #endif |
518 | } | |
519 | ||
fdc5432a DB |
520 | static inline bool skb_at_tc_ingress(const struct sk_buff *skb) |
521 | { | |
522 | #ifdef CONFIG_NET_CLS_ACT | |
8dc07fdb | 523 | return skb->tc_at_ingress; |
fdc5432a DB |
524 | #else |
525 | return false; | |
526 | #endif | |
527 | } | |
528 | ||
e7246e12 WB |
529 | static inline bool skb_skip_tc_classify(struct sk_buff *skb) |
530 | { | |
531 | #ifdef CONFIG_NET_CLS_ACT | |
532 | if (skb->tc_skip_classify) { | |
533 | skb->tc_skip_classify = 0; | |
534 | return true; | |
535 | } | |
536 | #endif | |
537 | return false; | |
538 | } | |
539 | ||
f0796d5c JF |
540 | /* Reset all TX qdiscs greater then index of a device. */ |
541 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) | |
5aa70995 | 542 | { |
4ef6acff JF |
543 | struct Qdisc *qdisc; |
544 | ||
f0796d5c | 545 | for (; i < dev->num_tx_queues; i++) { |
46e5da40 | 546 | qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc); |
4ef6acff JF |
547 | if (qdisc) { |
548 | spin_lock_bh(qdisc_lock(qdisc)); | |
549 | qdisc_reset(qdisc); | |
550 | spin_unlock_bh(qdisc_lock(qdisc)); | |
551 | } | |
552 | } | |
5aa70995 DM |
553 | } |
554 | ||
5aa70995 DM |
555 | static inline void qdisc_reset_all_tx(struct net_device *dev) |
556 | { | |
f0796d5c | 557 | qdisc_reset_all_tx_gt(dev, 0); |
5aa70995 DM |
558 | } |
559 | ||
3e745dd6 DM |
560 | /* Are all TX queues of the device empty? */ |
561 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
562 | { | |
e8a0464c | 563 | unsigned int i; |
46e5da40 JF |
564 | |
565 | rcu_read_lock(); | |
e8a0464c DM |
566 | for (i = 0; i < dev->num_tx_queues; i++) { |
567 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 568 | const struct Qdisc *q = rcu_dereference(txq->qdisc); |
3e745dd6 | 569 | |
46e5da40 JF |
570 | if (q->q.qlen) { |
571 | rcu_read_unlock(); | |
e8a0464c | 572 | return false; |
46e5da40 | 573 | } |
e8a0464c | 574 | } |
46e5da40 | 575 | rcu_read_unlock(); |
e8a0464c | 576 | return true; |
3e745dd6 DM |
577 | } |
578 | ||
6fa9864b | 579 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 580 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 581 | { |
e8a0464c | 582 | unsigned int i; |
46e5da40 | 583 | |
e8a0464c DM |
584 | for (i = 0; i < dev->num_tx_queues; i++) { |
585 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 586 | if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping) |
e8a0464c DM |
587 | return true; |
588 | } | |
589 | return false; | |
6fa9864b DM |
590 | } |
591 | ||
e8a0464c | 592 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
593 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
594 | { | |
e8a0464c | 595 | unsigned int i; |
46e5da40 | 596 | |
e8a0464c DM |
597 | for (i = 0; i < dev->num_tx_queues; i++) { |
598 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 599 | if (rcu_access_pointer(txq->qdisc) != &noop_qdisc) |
e8a0464c DM |
600 | return false; |
601 | } | |
602 | return true; | |
05297949 DM |
603 | } |
604 | ||
bfe0d029 | 605 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 606 | { |
175f9c1b | 607 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
608 | } |
609 | ||
c27f339a | 610 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
611 | enum net_xmit_qdisc_t { |
612 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 613 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
614 | }; |
615 | ||
c27f339a | 616 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 617 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
618 | #else |
619 | #define net_xmit_drop_count(e) (1) | |
620 | #endif | |
621 | ||
a2da570d ED |
622 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
623 | const struct Qdisc *sch) | |
5f86173b | 624 | { |
3a682fbd | 625 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
626 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
627 | ||
628 | if (stab) | |
629 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 630 | #endif |
a2da570d ED |
631 | } |
632 | ||
520ac30f ED |
633 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
634 | struct sk_buff **to_free) | |
a2da570d ED |
635 | { |
636 | qdisc_calculate_pkt_len(skb, sch); | |
520ac30f | 637 | return sch->enqueue(skb, sch, to_free); |
5f86173b JK |
638 | } |
639 | ||
22e0f8b9 JF |
640 | static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) |
641 | { | |
642 | return q->flags & TCQ_F_CPUSTATS; | |
643 | } | |
bfe0d029 | 644 | |
38040702 AV |
645 | static inline void _bstats_update(struct gnet_stats_basic_packed *bstats, |
646 | __u64 bytes, __u32 packets) | |
647 | { | |
648 | bstats->bytes += bytes; | |
649 | bstats->packets += packets; | |
650 | } | |
651 | ||
bfe0d029 ED |
652 | static inline void bstats_update(struct gnet_stats_basic_packed *bstats, |
653 | const struct sk_buff *skb) | |
654 | { | |
38040702 AV |
655 | _bstats_update(bstats, |
656 | qdisc_pkt_len(skb), | |
657 | skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1); | |
658 | } | |
659 | ||
660 | static inline void _bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, | |
661 | __u64 bytes, __u32 packets) | |
662 | { | |
663 | u64_stats_update_begin(&bstats->syncp); | |
664 | _bstats_update(&bstats->bstats, bytes, packets); | |
665 | u64_stats_update_end(&bstats->syncp); | |
bfe0d029 ED |
666 | } |
667 | ||
24ea591d ED |
668 | static inline void bstats_cpu_update(struct gnet_stats_basic_cpu *bstats, |
669 | const struct sk_buff *skb) | |
22e0f8b9 | 670 | { |
22e0f8b9 JF |
671 | u64_stats_update_begin(&bstats->syncp); |
672 | bstats_update(&bstats->bstats, skb); | |
673 | u64_stats_update_end(&bstats->syncp); | |
674 | } | |
675 | ||
24ea591d ED |
676 | static inline void qdisc_bstats_cpu_update(struct Qdisc *sch, |
677 | const struct sk_buff *skb) | |
678 | { | |
679 | bstats_cpu_update(this_cpu_ptr(sch->cpu_bstats), skb); | |
680 | } | |
681 | ||
bfe0d029 ED |
682 | static inline void qdisc_bstats_update(struct Qdisc *sch, |
683 | const struct sk_buff *skb) | |
bbd8a0d3 | 684 | { |
bfe0d029 | 685 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
686 | } |
687 | ||
25331d6c JF |
688 | static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch, |
689 | const struct sk_buff *skb) | |
690 | { | |
691 | sch->qstats.backlog -= qdisc_pkt_len(skb); | |
692 | } | |
693 | ||
40bd0362 JF |
694 | static inline void qdisc_qstats_cpu_backlog_dec(struct Qdisc *sch, |
695 | const struct sk_buff *skb) | |
696 | { | |
697 | this_cpu_sub(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
698 | } | |
699 | ||
25331d6c JF |
700 | static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch, |
701 | const struct sk_buff *skb) | |
702 | { | |
703 | sch->qstats.backlog += qdisc_pkt_len(skb); | |
704 | } | |
705 | ||
40bd0362 JF |
706 | static inline void qdisc_qstats_cpu_backlog_inc(struct Qdisc *sch, |
707 | const struct sk_buff *skb) | |
708 | { | |
709 | this_cpu_add(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
710 | } | |
711 | ||
712 | static inline void qdisc_qstats_cpu_qlen_inc(struct Qdisc *sch) | |
713 | { | |
714 | this_cpu_inc(sch->cpu_qstats->qlen); | |
715 | } | |
716 | ||
717 | static inline void qdisc_qstats_cpu_qlen_dec(struct Qdisc *sch) | |
718 | { | |
719 | this_cpu_dec(sch->cpu_qstats->qlen); | |
720 | } | |
721 | ||
722 | static inline void qdisc_qstats_cpu_requeues_inc(struct Qdisc *sch) | |
723 | { | |
724 | this_cpu_inc(sch->cpu_qstats->requeues); | |
725 | } | |
726 | ||
25331d6c JF |
727 | static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count) |
728 | { | |
729 | sch->qstats.drops += count; | |
730 | } | |
731 | ||
24ea591d | 732 | static inline void qstats_drop_inc(struct gnet_stats_queue *qstats) |
25331d6c | 733 | { |
24ea591d | 734 | qstats->drops++; |
25331d6c JF |
735 | } |
736 | ||
24ea591d | 737 | static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats) |
b0ab6f92 | 738 | { |
24ea591d ED |
739 | qstats->overlimits++; |
740 | } | |
b0ab6f92 | 741 | |
24ea591d ED |
742 | static inline void qdisc_qstats_drop(struct Qdisc *sch) |
743 | { | |
744 | qstats_drop_inc(&sch->qstats); | |
745 | } | |
746 | ||
747 | static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch) | |
748 | { | |
eb60a8dd | 749 | this_cpu_inc(sch->cpu_qstats->drops); |
b0ab6f92 JF |
750 | } |
751 | ||
25331d6c JF |
752 | static inline void qdisc_qstats_overlimit(struct Qdisc *sch) |
753 | { | |
754 | sch->qstats.overlimits++; | |
755 | } | |
756 | ||
48da34b7 FW |
757 | static inline void qdisc_skb_head_init(struct qdisc_skb_head *qh) |
758 | { | |
759 | qh->head = NULL; | |
760 | qh->tail = NULL; | |
761 | qh->qlen = 0; | |
762 | } | |
763 | ||
9972b25d | 764 | static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch, |
48da34b7 | 765 | struct qdisc_skb_head *qh) |
9972b25d | 766 | { |
48da34b7 FW |
767 | struct sk_buff *last = qh->tail; |
768 | ||
769 | if (last) { | |
770 | skb->next = NULL; | |
771 | last->next = skb; | |
772 | qh->tail = skb; | |
773 | } else { | |
774 | qh->tail = skb; | |
775 | qh->head = skb; | |
776 | } | |
777 | qh->qlen++; | |
25331d6c | 778 | qdisc_qstats_backlog_inc(sch, skb); |
9972b25d TG |
779 | |
780 | return NET_XMIT_SUCCESS; | |
781 | } | |
782 | ||
783 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
784 | { | |
785 | return __qdisc_enqueue_tail(skb, sch, &sch->q); | |
786 | } | |
787 | ||
48da34b7 | 788 | static inline struct sk_buff *__qdisc_dequeue_head(struct qdisc_skb_head *qh) |
9972b25d | 789 | { |
48da34b7 FW |
790 | struct sk_buff *skb = qh->head; |
791 | ||
792 | if (likely(skb != NULL)) { | |
793 | qh->head = skb->next; | |
794 | qh->qlen--; | |
795 | if (qh->head == NULL) | |
796 | qh->tail = NULL; | |
797 | skb->next = NULL; | |
798 | } | |
9972b25d | 799 | |
ec323368 FW |
800 | return skb; |
801 | } | |
802 | ||
803 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
804 | { | |
805 | struct sk_buff *skb = __qdisc_dequeue_head(&sch->q); | |
806 | ||
9190b3b3 | 807 | if (likely(skb != NULL)) { |
25331d6c | 808 | qdisc_qstats_backlog_dec(sch, skb); |
9190b3b3 ED |
809 | qdisc_bstats_update(sch, skb); |
810 | } | |
9972b25d TG |
811 | |
812 | return skb; | |
813 | } | |
814 | ||
520ac30f ED |
815 | /* Instead of calling kfree_skb() while root qdisc lock is held, |
816 | * queue the skb for future freeing at end of __dev_xmit_skb() | |
817 | */ | |
818 | static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free) | |
819 | { | |
820 | skb->next = *to_free; | |
821 | *to_free = skb; | |
822 | } | |
823 | ||
57dbb2d8 | 824 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, |
48da34b7 | 825 | struct qdisc_skb_head *qh, |
520ac30f | 826 | struct sk_buff **to_free) |
57dbb2d8 | 827 | { |
48da34b7 | 828 | struct sk_buff *skb = __qdisc_dequeue_head(qh); |
57dbb2d8 HPP |
829 | |
830 | if (likely(skb != NULL)) { | |
831 | unsigned int len = qdisc_pkt_len(skb); | |
520ac30f | 832 | |
25331d6c | 833 | qdisc_qstats_backlog_dec(sch, skb); |
520ac30f | 834 | __qdisc_drop(skb, to_free); |
57dbb2d8 HPP |
835 | return len; |
836 | } | |
837 | ||
838 | return 0; | |
839 | } | |
840 | ||
520ac30f ED |
841 | static inline unsigned int qdisc_queue_drop_head(struct Qdisc *sch, |
842 | struct sk_buff **to_free) | |
57dbb2d8 | 843 | { |
520ac30f | 844 | return __qdisc_queue_drop_head(sch, &sch->q, to_free); |
9972b25d TG |
845 | } |
846 | ||
48a8f519 PM |
847 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
848 | { | |
48da34b7 FW |
849 | const struct qdisc_skb_head *qh = &sch->q; |
850 | ||
851 | return qh->head; | |
48a8f519 PM |
852 | } |
853 | ||
77be155c JP |
854 | /* generic pseudo peek method for non-work-conserving qdisc */ |
855 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
856 | { | |
a53851e2 JF |
857 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
858 | ||
77be155c | 859 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ |
a53851e2 JF |
860 | if (!skb) { |
861 | skb = sch->dequeue(sch); | |
862 | ||
863 | if (skb) { | |
864 | __skb_queue_head(&sch->gso_skb, skb); | |
61c9eaf9 | 865 | /* it's still part of the queue */ |
a53851e2 | 866 | qdisc_qstats_backlog_inc(sch, skb); |
61c9eaf9 | 867 | sch->q.qlen++; |
a27758ff | 868 | } |
61c9eaf9 | 869 | } |
77be155c | 870 | |
a53851e2 | 871 | return skb; |
77be155c JP |
872 | } |
873 | ||
874 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ | |
875 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
876 | { | |
a53851e2 | 877 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
77be155c | 878 | |
61c9eaf9 | 879 | if (skb) { |
a53851e2 | 880 | skb = __skb_dequeue(&sch->gso_skb); |
a27758ff | 881 | qdisc_qstats_backlog_dec(sch, skb); |
61c9eaf9 JP |
882 | sch->q.qlen--; |
883 | } else { | |
77be155c | 884 | skb = sch->dequeue(sch); |
61c9eaf9 | 885 | } |
77be155c JP |
886 | |
887 | return skb; | |
888 | } | |
889 | ||
48da34b7 | 890 | static inline void __qdisc_reset_queue(struct qdisc_skb_head *qh) |
9972b25d TG |
891 | { |
892 | /* | |
893 | * We do not know the backlog in bytes of this list, it | |
894 | * is up to the caller to correct it | |
895 | */ | |
48da34b7 FW |
896 | ASSERT_RTNL(); |
897 | if (qh->qlen) { | |
898 | rtnl_kfree_skbs(qh->head, qh->tail); | |
899 | ||
900 | qh->head = NULL; | |
901 | qh->tail = NULL; | |
902 | qh->qlen = 0; | |
1b5c5493 | 903 | } |
9972b25d TG |
904 | } |
905 | ||
906 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
907 | { | |
1b5c5493 | 908 | __qdisc_reset_queue(&sch->q); |
9972b25d TG |
909 | sch->qstats.backlog = 0; |
910 | } | |
911 | ||
86a7996c WC |
912 | static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, |
913 | struct Qdisc **pold) | |
914 | { | |
915 | struct Qdisc *old; | |
916 | ||
917 | sch_tree_lock(sch); | |
918 | old = *pold; | |
919 | *pold = new; | |
920 | if (old != NULL) { | |
68a66d14 KK |
921 | unsigned int qlen = old->q.qlen; |
922 | unsigned int backlog = old->qstats.backlog; | |
923 | ||
86a7996c | 924 | qdisc_reset(old); |
68a66d14 | 925 | qdisc_tree_reduce_backlog(old, qlen, backlog); |
86a7996c WC |
926 | } |
927 | sch_tree_unlock(sch); | |
928 | ||
929 | return old; | |
930 | } | |
931 | ||
1b5c5493 ED |
932 | static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) |
933 | { | |
934 | rtnl_kfree_skbs(skb, skb); | |
935 | qdisc_qstats_drop(sch); | |
936 | } | |
937 | ||
40bd0362 JF |
938 | static inline int qdisc_drop_cpu(struct sk_buff *skb, struct Qdisc *sch, |
939 | struct sk_buff **to_free) | |
940 | { | |
941 | __qdisc_drop(skb, to_free); | |
942 | qdisc_qstats_cpu_drop(sch); | |
943 | ||
944 | return NET_XMIT_DROP; | |
945 | } | |
520ac30f ED |
946 | |
947 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch, | |
948 | struct sk_buff **to_free) | |
9972b25d | 949 | { |
520ac30f | 950 | __qdisc_drop(skb, to_free); |
25331d6c | 951 | qdisc_qstats_drop(sch); |
9972b25d TG |
952 | |
953 | return NET_XMIT_DROP; | |
954 | } | |
955 | ||
e9bef55d JDB |
956 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
957 | long it will take to send a packet given its size. | |
958 | */ | |
959 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
960 | { | |
e08b0998 JDB |
961 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
962 | if (slot < 0) | |
963 | slot = 0; | |
e9bef55d JDB |
964 | slot >>= rtab->rate.cell_log; |
965 | if (slot > 255) | |
a02cec21 | 966 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
967 | return rtab->data[slot]; |
968 | } | |
969 | ||
292f1c7f | 970 | struct psched_ratecfg { |
130d3d68 | 971 | u64 rate_bytes_ps; /* bytes per second */ |
01cb71d2 ED |
972 | u32 mult; |
973 | u16 overhead; | |
8a8e3d84 | 974 | u8 linklayer; |
01cb71d2 | 975 | u8 shift; |
292f1c7f JP |
976 | }; |
977 | ||
978 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
979 | unsigned int len) | |
980 | { | |
8a8e3d84 JDB |
981 | len += r->overhead; |
982 | ||
983 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) | |
984 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
985 | ||
986 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
987 | } |
988 | ||
5c15257f | 989 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
3e1e3aae ED |
990 | const struct tc_ratespec *conf, |
991 | u64 rate64); | |
292f1c7f | 992 | |
01cb71d2 ED |
993 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
994 | const struct psched_ratecfg *r) | |
292f1c7f | 995 | { |
01cb71d2 | 996 | memset(res, 0, sizeof(*res)); |
3e1e3aae ED |
997 | |
998 | /* legacy struct tc_ratespec has a 32bit @rate field | |
999 | * Qdisc using 64bit rate should add new attributes | |
1000 | * in order to maintain compatibility. | |
1001 | */ | |
1002 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); | |
1003 | ||
01cb71d2 | 1004 | res->overhead = r->overhead; |
8a8e3d84 | 1005 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
1006 | } |
1007 | ||
46209401 JP |
1008 | /* Mini Qdisc serves for specific needs of ingress/clsact Qdisc. |
1009 | * The fast path only needs to access filter list and to update stats | |
1010 | */ | |
1011 | struct mini_Qdisc { | |
1012 | struct tcf_proto *filter_list; | |
1013 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; | |
1014 | struct gnet_stats_queue __percpu *cpu_qstats; | |
1015 | struct rcu_head rcu; | |
1016 | }; | |
1017 | ||
1018 | static inline void mini_qdisc_bstats_cpu_update(struct mini_Qdisc *miniq, | |
1019 | const struct sk_buff *skb) | |
1020 | { | |
1021 | bstats_cpu_update(this_cpu_ptr(miniq->cpu_bstats), skb); | |
1022 | } | |
1023 | ||
1024 | static inline void mini_qdisc_qstats_cpu_drop(struct mini_Qdisc *miniq) | |
1025 | { | |
1026 | this_cpu_inc(miniq->cpu_qstats->drops); | |
1027 | } | |
1028 | ||
1029 | struct mini_Qdisc_pair { | |
1030 | struct mini_Qdisc miniq1; | |
1031 | struct mini_Qdisc miniq2; | |
1032 | struct mini_Qdisc __rcu **p_miniq; | |
1033 | }; | |
1034 | ||
1035 | void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp, | |
1036 | struct tcf_proto *tp_head); | |
1037 | void mini_qdisc_pair_init(struct mini_Qdisc_pair *miniqp, struct Qdisc *qdisc, | |
1038 | struct mini_Qdisc __rcu **p_miniq); | |
1039 | ||
1da177e4 | 1040 | #endif |