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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> |
4f8116c8 | 16 | #include <linux/rwsem.h> |
97394bef | 17 | #include <linux/atomic.h> |
59eb87cb | 18 | #include <linux/hashtable.h> |
1da177e4 | 19 | #include <net/gen_stats.h> |
be577ddc | 20 | #include <net/rtnetlink.h> |
a7323311 | 21 | #include <net/flow_offload.h> |
1da177e4 LT |
22 | |
23 | struct Qdisc_ops; | |
24 | struct qdisc_walker; | |
25 | struct tcf_walker; | |
26 | struct module; | |
d58e468b | 27 | struct bpf_flow_keys; |
1da177e4 | 28 | |
fd2c3ef7 | 29 | struct qdisc_rate_table { |
1da177e4 LT |
30 | struct tc_ratespec rate; |
31 | u32 data[256]; | |
32 | struct qdisc_rate_table *next; | |
33 | int refcnt; | |
34 | }; | |
35 | ||
fd2c3ef7 | 36 | enum qdisc_state_t { |
37437bb2 | 37 | __QDISC_STATE_SCHED, |
a9312ae8 | 38 | __QDISC_STATE_DEACTIVATED, |
a90c57f2 | 39 | __QDISC_STATE_MISSED, |
c4fef01b | 40 | __QDISC_STATE_DRAINING, |
97604c65 ED |
41 | }; |
42 | ||
43 | enum qdisc_state2_t { | |
29cbcd85 AD |
44 | /* Only for !TCQ_F_NOLOCK qdisc. Never access it directly. |
45 | * Use qdisc_run_begin/end() or qdisc_is_running() instead. | |
46 | */ | |
97604c65 | 47 | __QDISC_STATE2_RUNNING, |
e2627c8c DM |
48 | }; |
49 | ||
c4fef01b YL |
50 | #define QDISC_STATE_MISSED BIT(__QDISC_STATE_MISSED) |
51 | #define QDISC_STATE_DRAINING BIT(__QDISC_STATE_DRAINING) | |
52 | ||
53 | #define QDISC_STATE_NON_EMPTY (QDISC_STATE_MISSED | \ | |
54 | QDISC_STATE_DRAINING) | |
55 | ||
175f9c1b | 56 | struct qdisc_size_table { |
a2da570d | 57 | struct rcu_head rcu; |
175f9c1b JK |
58 | struct list_head list; |
59 | struct tc_sizespec szopts; | |
60 | int refcnt; | |
61 | u16 data[]; | |
62 | }; | |
63 | ||
48da34b7 FW |
64 | /* similar to sk_buff_head, but skb->prev pointer is undefined. */ |
65 | struct qdisc_skb_head { | |
66 | struct sk_buff *head; | |
67 | struct sk_buff *tail; | |
73eb628d | 68 | __u32 qlen; |
48da34b7 FW |
69 | spinlock_t lock; |
70 | }; | |
71 | ||
fd2c3ef7 | 72 | struct Qdisc { |
520ac30f ED |
73 | int (*enqueue)(struct sk_buff *skb, |
74 | struct Qdisc *sch, | |
75 | struct sk_buff **to_free); | |
76 | struct sk_buff * (*dequeue)(struct Qdisc *sch); | |
05bdd2f1 | 77 | unsigned int flags; |
b00355db | 78 | #define TCQ_F_BUILTIN 1 |
fd245a4a ED |
79 | #define TCQ_F_INGRESS 2 |
80 | #define TCQ_F_CAN_BYPASS 4 | |
81 | #define TCQ_F_MQROOT 8 | |
1abbe139 ED |
82 | #define TCQ_F_ONETXQUEUE 0x10 /* dequeue_skb() can assume all skbs are for |
83 | * q->dev_queue : It can test | |
84 | * netif_xmit_frozen_or_stopped() before | |
85 | * dequeueing next packet. | |
86 | * Its true for MQ/MQPRIO slaves, or non | |
87 | * multiqueue device. | |
88 | */ | |
b00355db | 89 | #define TCQ_F_WARN_NONWC (1 << 16) |
22e0f8b9 | 90 | #define TCQ_F_CPUSTATS 0x20 /* run using percpu statistics */ |
4eaf3b84 ED |
91 | #define TCQ_F_NOPARENT 0x40 /* root of its hierarchy : |
92 | * qdisc_tree_decrease_qlen() should stop. | |
93 | */ | |
49b49971 | 94 | #define TCQ_F_INVISIBLE 0x80 /* invisible by default in dump */ |
6b3ba914 | 95 | #define TCQ_F_NOLOCK 0x100 /* qdisc does not require locking */ |
7a4fa291 | 96 | #define TCQ_F_OFFLOADED 0x200 /* qdisc is offloaded to HW */ |
45203a3b | 97 | u32 limit; |
05bdd2f1 | 98 | const struct Qdisc_ops *ops; |
a2da570d | 99 | struct qdisc_size_table __rcu *stab; |
59cc1f61 | 100 | struct hlist_node hash; |
1da177e4 LT |
101 | u32 handle; |
102 | u32 parent; | |
72b25a91 | 103 | |
5e140dfc | 104 | struct netdev_queue *dev_queue; |
5e140dfc | 105 | |
1c0d32fd | 106 | struct net_rate_estimator __rcu *rate_est; |
50dc9a85 | 107 | struct gnet_stats_basic_sync __percpu *cpu_bstats; |
0d32ef8c | 108 | struct gnet_stats_queue __percpu *cpu_qstats; |
846e463a | 109 | int pad; |
e9be0e99 | 110 | refcount_t refcnt; |
0d32ef8c | 111 | |
5e140dfc ED |
112 | /* |
113 | * For performance sake on SMP, we put highly modified fields at the end | |
114 | */ | |
a53851e2 | 115 | struct sk_buff_head gso_skb ____cacheline_aligned_in_smp; |
48da34b7 | 116 | struct qdisc_skb_head q; |
50dc9a85 | 117 | struct gnet_stats_basic_sync bstats; |
0d32ef8c | 118 | struct gnet_stats_queue qstats; |
4d202a0d | 119 | unsigned long state; |
97604c65 | 120 | unsigned long state2; /* must be written under qdisc spinlock */ |
4d202a0d | 121 | struct Qdisc *next_sched; |
70e57d5e | 122 | struct sk_buff_head skb_bad_txq; |
45203a3b ED |
123 | |
124 | spinlock_t busylock ____cacheline_aligned_in_smp; | |
96009c7d | 125 | spinlock_t seqlock; |
28cff537 | 126 | |
3a7d0d07 | 127 | struct rcu_head rcu; |
606509f2 | 128 | netdevice_tracker dev_tracker; |
846e463a ED |
129 | /* private data */ |
130 | long privdata[] ____cacheline_aligned; | |
1da177e4 LT |
131 | }; |
132 | ||
551143d8 ED |
133 | static inline void qdisc_refcount_inc(struct Qdisc *qdisc) |
134 | { | |
135 | if (qdisc->flags & TCQ_F_BUILTIN) | |
136 | return; | |
137 | refcount_inc(&qdisc->refcnt); | |
138 | } | |
139 | ||
9d7e82ce VB |
140 | /* Intended to be used by unlocked users, when concurrent qdisc release is |
141 | * possible. | |
142 | */ | |
143 | ||
144 | static inline struct Qdisc *qdisc_refcount_inc_nz(struct Qdisc *qdisc) | |
145 | { | |
146 | if (qdisc->flags & TCQ_F_BUILTIN) | |
147 | return qdisc; | |
148 | if (refcount_inc_not_zero(&qdisc->refcnt)) | |
149 | return qdisc; | |
150 | return NULL; | |
151 | } | |
152 | ||
29cbcd85 AD |
153 | /* For !TCQ_F_NOLOCK qdisc: callers must either call this within a qdisc |
154 | * root_lock section, or provide their own memory barriers -- ordering | |
155 | * against qdisc_run_begin/end() atomic bit operations. | |
156 | */ | |
96009c7d | 157 | static inline bool qdisc_is_running(struct Qdisc *qdisc) |
bc135b23 | 158 | { |
32f7b44d | 159 | if (qdisc->flags & TCQ_F_NOLOCK) |
96009c7d | 160 | return spin_is_locked(&qdisc->seqlock); |
97604c65 | 161 | return test_bit(__QDISC_STATE2_RUNNING, &qdisc->state2); |
bc135b23 ED |
162 | } |
163 | ||
c4fef01b YL |
164 | static inline bool nolock_qdisc_is_empty(const struct Qdisc *qdisc) |
165 | { | |
166 | return !(READ_ONCE(qdisc->state) & QDISC_STATE_NON_EMPTY); | |
167 | } | |
168 | ||
9c01c9f1 PA |
169 | static inline bool qdisc_is_percpu_stats(const struct Qdisc *q) |
170 | { | |
171 | return q->flags & TCQ_F_CPUSTATS; | |
172 | } | |
173 | ||
28cff537 PA |
174 | static inline bool qdisc_is_empty(const struct Qdisc *qdisc) |
175 | { | |
9c01c9f1 | 176 | if (qdisc_is_percpu_stats(qdisc)) |
d3e0f575 | 177 | return nolock_qdisc_is_empty(qdisc); |
90b2be27 | 178 | return !READ_ONCE(qdisc->q.qlen); |
28cff537 PA |
179 | } |
180 | ||
29cbcd85 AD |
181 | /* For !TCQ_F_NOLOCK qdisc, qdisc_run_begin/end() must be invoked with |
182 | * the qdisc root lock acquired. | |
183 | */ | |
bc135b23 ED |
184 | static inline bool qdisc_run_begin(struct Qdisc *qdisc) |
185 | { | |
32f7b44d | 186 | if (qdisc->flags & TCQ_F_NOLOCK) { |
a90c57f2 | 187 | if (spin_trylock(&qdisc->seqlock)) |
d3e0f575 | 188 | return true; |
a90c57f2 | 189 | |
a54ce370 VR |
190 | /* No need to insist if the MISSED flag was already set. |
191 | * Note that test_and_set_bit() also gives us memory ordering | |
192 | * guarantees wrt potential earlier enqueue() and below | |
193 | * spin_trylock(), both of which are necessary to prevent races | |
89837eb4 | 194 | */ |
a54ce370 | 195 | if (test_and_set_bit(__QDISC_STATE_MISSED, &qdisc->state)) |
a90c57f2 YL |
196 | return false; |
197 | ||
a54ce370 VR |
198 | /* Try to take the lock again to make sure that we will either |
199 | * grab it or the CPU that still has it will see MISSED set | |
200 | * when testing it in qdisc_run_end() | |
a90c57f2 | 201 | */ |
d3e0f575 | 202 | return spin_trylock(&qdisc->seqlock); |
32f7b44d | 203 | } |
97604c65 | 204 | return !__test_and_set_bit(__QDISC_STATE2_RUNNING, &qdisc->state2); |
bc135b23 ED |
205 | } |
206 | ||
207 | static inline void qdisc_run_end(struct Qdisc *qdisc) | |
208 | { | |
a90c57f2 | 209 | if (qdisc->flags & TCQ_F_NOLOCK) { |
96009c7d | 210 | spin_unlock(&qdisc->seqlock); |
a90c57f2 YL |
211 | |
212 | if (unlikely(test_bit(__QDISC_STATE_MISSED, | |
c4fef01b | 213 | &qdisc->state))) |
a90c57f2 | 214 | __netif_schedule(qdisc); |
dd25296a | 215 | } else { |
97604c65 | 216 | __clear_bit(__QDISC_STATE2_RUNNING, &qdisc->state2); |
a90c57f2 | 217 | } |
fd245a4a ED |
218 | } |
219 | ||
5772e9a3 JDB |
220 | static inline bool qdisc_may_bulk(const struct Qdisc *qdisc) |
221 | { | |
222 | return qdisc->flags & TCQ_F_ONETXQUEUE; | |
223 | } | |
224 | ||
225 | static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq) | |
226 | { | |
227 | #ifdef CONFIG_BQL | |
228 | /* Non-BQL migrated drivers will return 0, too. */ | |
229 | return dql_avail(&txq->dql); | |
230 | #else | |
231 | return 0; | |
232 | #endif | |
233 | } | |
234 | ||
fd2c3ef7 | 235 | struct Qdisc_class_ops { |
dfcd2a2b | 236 | unsigned int flags; |
1da177e4 | 237 | /* Child qdisc manipulation */ |
926e61b7 | 238 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 | 239 | int (*graft)(struct Qdisc *, unsigned long cl, |
653d6fd6 AA |
240 | struct Qdisc *, struct Qdisc **, |
241 | struct netlink_ext_ack *extack); | |
1da177e4 | 242 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); |
43effa1e | 243 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
244 | |
245 | /* Class manipulation routines */ | |
143976ce | 246 | unsigned long (*find)(struct Qdisc *, u32 classid); |
1da177e4 | 247 | int (*change)(struct Qdisc *, u32, u32, |
793d81d6 AA |
248 | struct nlattr **, unsigned long *, |
249 | struct netlink_ext_ack *); | |
4dd78a73 MM |
250 | int (*delete)(struct Qdisc *, unsigned long, |
251 | struct netlink_ext_ack *); | |
1da177e4 LT |
252 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); |
253 | ||
254 | /* Filter manipulation */ | |
0ac4bd68 | 255 | struct tcf_block * (*tcf_block)(struct Qdisc *sch, |
cbaacc4e AA |
256 | unsigned long arg, |
257 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
258 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
259 | u32 classid); | |
260 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
261 | ||
262 | /* rtnetlink specific */ | |
263 | int (*dump)(struct Qdisc *, unsigned long, | |
264 | struct sk_buff *skb, struct tcmsg*); | |
265 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
266 | struct gnet_dump *); | |
267 | }; | |
268 | ||
dfcd2a2b VB |
269 | /* Qdisc_class_ops flag values */ |
270 | ||
271 | /* Implements API that doesn't require rtnl lock */ | |
272 | enum qdisc_class_ops_flags { | |
273 | QDISC_CLASS_OPS_DOIT_UNLOCKED = 1, | |
274 | }; | |
275 | ||
fd2c3ef7 | 276 | struct Qdisc_ops { |
1da177e4 | 277 | struct Qdisc_ops *next; |
20fea08b | 278 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
279 | char id[IFNAMSIZ]; |
280 | int priv_size; | |
d59f5ffa | 281 | unsigned int static_flags; |
1da177e4 | 282 | |
520ac30f ED |
283 | int (*enqueue)(struct sk_buff *skb, |
284 | struct Qdisc *sch, | |
285 | struct sk_buff **to_free); | |
1da177e4 | 286 | struct sk_buff * (*dequeue)(struct Qdisc *); |
90d841fd | 287 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 | 288 | |
e63d7dfd AA |
289 | int (*init)(struct Qdisc *sch, struct nlattr *arg, |
290 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
291 | void (*reset)(struct Qdisc *); |
292 | void (*destroy)(struct Qdisc *); | |
0ac4bd68 | 293 | int (*change)(struct Qdisc *sch, |
2030721c AA |
294 | struct nlattr *arg, |
295 | struct netlink_ext_ack *extack); | |
0ac4bd68 | 296 | void (*attach)(struct Qdisc *sch); |
48bfd55e | 297 | int (*change_tx_queue_len)(struct Qdisc *, unsigned int); |
1e080f17 JK |
298 | void (*change_real_num_tx)(struct Qdisc *sch, |
299 | unsigned int new_real_tx); | |
1da177e4 LT |
300 | |
301 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
302 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
303 | ||
d47a6b0e JP |
304 | void (*ingress_block_set)(struct Qdisc *sch, |
305 | u32 block_index); | |
306 | void (*egress_block_set)(struct Qdisc *sch, | |
307 | u32 block_index); | |
308 | u32 (*ingress_block_get)(struct Qdisc *sch); | |
309 | u32 (*egress_block_get)(struct Qdisc *sch); | |
310 | ||
1da177e4 LT |
311 | struct module *owner; |
312 | }; | |
313 | ||
314 | ||
fd2c3ef7 | 315 | struct tcf_result { |
db50514f JP |
316 | union { |
317 | struct { | |
318 | unsigned long class; | |
319 | u32 classid; | |
320 | }; | |
321 | const struct tcf_proto *goto_tp; | |
cd11b164 | 322 | |
720f22fe | 323 | /* used in the skb_tc_reinsert function */ |
cd11b164 PA |
324 | struct { |
325 | bool ingress; | |
326 | struct gnet_stats_queue *qstats; | |
327 | }; | |
db50514f | 328 | }; |
1da177e4 LT |
329 | }; |
330 | ||
9f407f17 JP |
331 | struct tcf_chain; |
332 | ||
fd2c3ef7 | 333 | struct tcf_proto_ops { |
36272874 | 334 | struct list_head head; |
1da177e4 LT |
335 | char kind[IFNAMSIZ]; |
336 | ||
dc7f9f6e ED |
337 | int (*classify)(struct sk_buff *, |
338 | const struct tcf_proto *, | |
339 | struct tcf_result *); | |
1da177e4 | 340 | int (*init)(struct tcf_proto*); |
12db03b6 | 341 | void (*destroy)(struct tcf_proto *tp, bool rtnl_held, |
715df5ec | 342 | struct netlink_ext_ack *extack); |
1da177e4 | 343 | |
8113c095 | 344 | void* (*get)(struct tcf_proto*, u32 handle); |
7d5509fa | 345 | void (*put)(struct tcf_proto *tp, void *f); |
c1b52739 | 346 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 347 | struct tcf_proto*, unsigned long, |
add93b61 | 348 | u32 handle, struct nlattr **, |
695176bf | 349 | void **, u32, |
7306db38 | 350 | struct netlink_ext_ack *); |
8865fdd4 | 351 | int (*delete)(struct tcf_proto *tp, void *arg, |
12db03b6 | 352 | bool *last, bool rtnl_held, |
571acf21 | 353 | struct netlink_ext_ack *); |
a5b72a08 | 354 | bool (*delete_empty)(struct tcf_proto *tp); |
12db03b6 VB |
355 | void (*walk)(struct tcf_proto *tp, |
356 | struct tcf_walker *arg, bool rtnl_held); | |
e56185c7 | 357 | int (*reoffload)(struct tcf_proto *tp, bool add, |
a7323311 | 358 | flow_setup_cb_t *cb, void *cb_priv, |
e56185c7 | 359 | struct netlink_ext_ack *extack); |
a449a3e7 VB |
360 | void (*hw_add)(struct tcf_proto *tp, |
361 | void *type_data); | |
362 | void (*hw_del)(struct tcf_proto *tp, | |
363 | void *type_data); | |
2e24cd75 CW |
364 | void (*bind_class)(void *, u32, unsigned long, |
365 | void *, unsigned long); | |
9f407f17 JP |
366 | void * (*tmplt_create)(struct net *net, |
367 | struct tcf_chain *chain, | |
368 | struct nlattr **tca, | |
369 | struct netlink_ext_ack *extack); | |
370 | void (*tmplt_destroy)(void *tmplt_priv); | |
1da177e4 LT |
371 | |
372 | /* rtnetlink specific */ | |
8113c095 | 373 | int (*dump)(struct net*, struct tcf_proto*, void *, |
12db03b6 VB |
374 | struct sk_buff *skb, struct tcmsg*, |
375 | bool); | |
f8ab1807 VB |
376 | int (*terse_dump)(struct net *net, |
377 | struct tcf_proto *tp, void *fh, | |
378 | struct sk_buff *skb, | |
379 | struct tcmsg *t, bool rtnl_held); | |
9f407f17 JP |
380 | int (*tmplt_dump)(struct sk_buff *skb, |
381 | struct net *net, | |
382 | void *tmplt_priv); | |
1da177e4 LT |
383 | |
384 | struct module *owner; | |
12db03b6 VB |
385 | int flags; |
386 | }; | |
387 | ||
a5b72a08 DC |
388 | /* Classifiers setting TCF_PROTO_OPS_DOIT_UNLOCKED in tcf_proto_ops->flags |
389 | * are expected to implement tcf_proto_ops->delete_empty(), otherwise race | |
390 | * conditions can occur when filters are inserted/deleted simultaneously. | |
391 | */ | |
12db03b6 VB |
392 | enum tcf_proto_ops_flags { |
393 | TCF_PROTO_OPS_DOIT_UNLOCKED = 1, | |
1da177e4 LT |
394 | }; |
395 | ||
fd2c3ef7 | 396 | struct tcf_proto { |
1da177e4 | 397 | /* Fast access part */ |
25d8c0d5 JF |
398 | struct tcf_proto __rcu *next; |
399 | void __rcu *root; | |
7fd4b288 PA |
400 | |
401 | /* called under RCU BH lock*/ | |
dc7f9f6e ED |
402 | int (*classify)(struct sk_buff *, |
403 | const struct tcf_proto *, | |
404 | struct tcf_result *); | |
66c6f529 | 405 | __be16 protocol; |
1da177e4 LT |
406 | |
407 | /* All the rest */ | |
408 | u32 prio; | |
1da177e4 | 409 | void *data; |
dc7f9f6e | 410 | const struct tcf_proto_ops *ops; |
5bc17018 | 411 | struct tcf_chain *chain; |
8b64678e VB |
412 | /* Lock protects tcf_proto shared state and can be used by unlocked |
413 | * classifiers to protect their private data. | |
414 | */ | |
415 | spinlock_t lock; | |
416 | bool deleting; | |
4dbfa766 | 417 | refcount_t refcnt; |
25d8c0d5 | 418 | struct rcu_head rcu; |
59eb87cb | 419 | struct hlist_node destroy_ht_node; |
1da177e4 LT |
420 | }; |
421 | ||
175f9c1b | 422 | struct qdisc_skb_cb { |
089b19a9 SF |
423 | struct { |
424 | unsigned int pkt_len; | |
425 | u16 slave_dev_queue_mapping; | |
426 | u16 tc_classid; | |
d58e468b | 427 | }; |
25711786 ED |
428 | #define QDISC_CB_PRIV_LEN 20 |
429 | unsigned char data[QDISC_CB_PRIV_LEN]; | |
175f9c1b JK |
430 | }; |
431 | ||
c7eb7d72 JP |
432 | typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv); |
433 | ||
2190d1d0 | 434 | struct tcf_chain { |
ed76f5ed VB |
435 | /* Protects filter_chain. */ |
436 | struct mutex filter_chain_lock; | |
2190d1d0 | 437 | struct tcf_proto __rcu *filter_chain; |
5bc17018 JP |
438 | struct list_head list; |
439 | struct tcf_block *block; | |
440 | u32 index; /* chain index */ | |
441 | unsigned int refcnt; | |
1f3ed383 | 442 | unsigned int action_refcnt; |
32a4f5ec | 443 | bool explicitly_created; |
726d0612 | 444 | bool flushing; |
9f407f17 JP |
445 | const struct tcf_proto_ops *tmplt_ops; |
446 | void *tmplt_priv; | |
ee3bbfe8 | 447 | struct rcu_head rcu; |
6529eaba JP |
448 | }; |
449 | ||
2190d1d0 | 450 | struct tcf_block { |
c266f64d VB |
451 | /* Lock protects tcf_block and lifetime-management data of chains |
452 | * attached to the block (refcnt, action_refcnt, explicitly_created). | |
453 | */ | |
454 | struct mutex lock; | |
5bc17018 | 455 | struct list_head chain_list; |
48617387 | 456 | u32 index; /* block index for shared blocks */ |
a7df4870 | 457 | u32 classid; /* which class this block belongs to */ |
cfebd7e2 | 458 | refcount_t refcnt; |
855319be | 459 | struct net *net; |
69d78ef2 | 460 | struct Qdisc *q; |
4f8116c8 | 461 | struct rw_semaphore cb_lock; /* protects cb_list and offload counters */ |
14bfb13f | 462 | struct flow_block flow_block; |
f36fe1c4 JP |
463 | struct list_head owner_list; |
464 | bool keep_dst; | |
97394bef | 465 | atomic_t offloadcnt; /* Number of oddloaded filters */ |
caa72601 | 466 | unsigned int nooffloaddevcnt; /* Number of devs unable to do offload */ |
c9f14470 | 467 | unsigned int lockeddevcnt; /* Number of devs that require rtnl lock. */ |
f71e0ca4 JP |
468 | struct { |
469 | struct tcf_chain *chain; | |
470 | struct list_head filter_chain_list; | |
471 | } chain0; | |
0607e439 | 472 | struct rcu_head rcu; |
59eb87cb JH |
473 | DECLARE_HASHTABLE(proto_destroy_ht, 7); |
474 | struct mutex proto_destroy_lock; /* Lock for proto_destroy hashtable. */ | |
2190d1d0 JP |
475 | }; |
476 | ||
ed76f5ed VB |
477 | static inline bool lockdep_tcf_chain_is_locked(struct tcf_chain *chain) |
478 | { | |
479 | return lockdep_is_held(&chain->filter_chain_lock); | |
480 | } | |
8b64678e VB |
481 | |
482 | static inline bool lockdep_tcf_proto_is_locked(struct tcf_proto *tp) | |
483 | { | |
484 | return lockdep_is_held(&tp->lock); | |
485 | } | |
ed76f5ed VB |
486 | |
487 | #define tcf_chain_dereference(p, chain) \ | |
488 | rcu_dereference_protected(p, lockdep_tcf_chain_is_locked(chain)) | |
489 | ||
8b64678e VB |
490 | #define tcf_proto_dereference(p, tp) \ |
491 | rcu_dereference_protected(p, lockdep_tcf_proto_is_locked(tp)) | |
492 | ||
16bda13d DM |
493 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
494 | { | |
495 | struct qdisc_skb_cb *qcb; | |
5ee31c68 | 496 | |
038ebb1a | 497 | BUILD_BUG_ON(sizeof(skb->cb) < sizeof(*qcb)); |
16bda13d DM |
498 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
499 | } | |
500 | ||
05bdd2f1 | 501 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
502 | { |
503 | return q->q.qlen; | |
504 | } | |
505 | ||
73eb628d | 506 | static inline int qdisc_qlen_sum(const struct Qdisc *q) |
7e66016f | 507 | { |
73eb628d PA |
508 | __u32 qlen = q->qstats.qlen; |
509 | int i; | |
7e66016f | 510 | |
73eb628d PA |
511 | if (qdisc_is_percpu_stats(q)) { |
512 | for_each_possible_cpu(i) | |
513 | qlen += per_cpu_ptr(q->cpu_qstats, i)->qlen; | |
514 | } else { | |
6172abc1 | 515 | qlen += q->q.qlen; |
73eb628d | 516 | } |
7e66016f JF |
517 | |
518 | return qlen; | |
519 | } | |
520 | ||
bfe0d029 | 521 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
522 | { |
523 | return (struct qdisc_skb_cb *)skb->cb; | |
524 | } | |
525 | ||
83874000 DM |
526 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
527 | { | |
528 | return &qdisc->q.lock; | |
529 | } | |
530 | ||
05bdd2f1 | 531 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc | 532 | { |
46e5da40 JF |
533 | struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc); |
534 | ||
535 | return q; | |
7698b4fc DM |
536 | } |
537 | ||
159d2c7d ED |
538 | static inline struct Qdisc *qdisc_root_bh(const struct Qdisc *qdisc) |
539 | { | |
540 | return rcu_dereference_bh(qdisc->dev_queue->qdisc); | |
541 | } | |
542 | ||
05bdd2f1 | 543 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
544 | { |
545 | return qdisc->dev_queue->qdisc_sleeping; | |
546 | } | |
547 | ||
7e43f112 DM |
548 | /* The qdisc root lock is a mechanism by which to top level |
549 | * of a qdisc tree can be locked from any qdisc node in the | |
550 | * forest. This allows changing the configuration of some | |
551 | * aspect of the qdisc tree while blocking out asynchronous | |
552 | * qdisc access in the packet processing paths. | |
553 | * | |
554 | * It is only legal to do this when the root will not change | |
555 | * on us. Otherwise we'll potentially lock the wrong qdisc | |
556 | * root. This is enforced by holding the RTNL semaphore, which | |
557 | * all users of this lock accessor must do. | |
558 | */ | |
05bdd2f1 | 559 | static inline spinlock_t *qdisc_root_lock(const struct Qdisc *qdisc) |
7698b4fc DM |
560 | { |
561 | struct Qdisc *root = qdisc_root(qdisc); | |
562 | ||
7e43f112 | 563 | ASSERT_RTNL(); |
83874000 | 564 | return qdisc_lock(root); |
7698b4fc DM |
565 | } |
566 | ||
05bdd2f1 | 567 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
568 | { |
569 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
570 | ||
571 | ASSERT_RTNL(); | |
572 | return qdisc_lock(root); | |
573 | } | |
574 | ||
05bdd2f1 | 575 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
576 | { |
577 | return qdisc->dev_queue->dev; | |
578 | } | |
1da177e4 | 579 | |
ca1e4ab1 | 580 | static inline void sch_tree_lock(struct Qdisc *q) |
78a5b30b | 581 | { |
ca1e4ab1 MM |
582 | if (q->flags & TCQ_F_MQROOT) |
583 | spin_lock_bh(qdisc_lock(q)); | |
584 | else | |
585 | spin_lock_bh(qdisc_root_sleeping_lock(q)); | |
78a5b30b DM |
586 | } |
587 | ||
ca1e4ab1 | 588 | static inline void sch_tree_unlock(struct Qdisc *q) |
78a5b30b | 589 | { |
ca1e4ab1 MM |
590 | if (q->flags & TCQ_F_MQROOT) |
591 | spin_unlock_bh(qdisc_lock(q)); | |
592 | else | |
593 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); | |
78a5b30b DM |
594 | } |
595 | ||
e41a33e6 TG |
596 | extern struct Qdisc noop_qdisc; |
597 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
598 | extern struct Qdisc_ops pfifo_fast_ops; |
599 | extern struct Qdisc_ops mq_qdisc_ops; | |
d66d6c31 | 600 | extern struct Qdisc_ops noqueue_qdisc_ops; |
6da7c8fc | 601 | extern const struct Qdisc_ops *default_qdisc_ops; |
1f27cde3 ED |
602 | static inline const struct Qdisc_ops * |
603 | get_default_qdisc_ops(const struct net_device *dev, int ntx) | |
604 | { | |
605 | return ntx < dev->real_num_tx_queues ? | |
606 | default_qdisc_ops : &pfifo_fast_ops; | |
607 | } | |
e41a33e6 | 608 | |
fd2c3ef7 | 609 | struct Qdisc_class_common { |
6fe1c7a5 PM |
610 | u32 classid; |
611 | struct hlist_node hnode; | |
612 | }; | |
613 | ||
fd2c3ef7 | 614 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
615 | struct hlist_head *hash; |
616 | unsigned int hashsize; | |
617 | unsigned int hashmask; | |
618 | unsigned int hashelems; | |
619 | }; | |
620 | ||
621 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
622 | { | |
623 | id ^= id >> 8; | |
624 | id ^= id >> 4; | |
625 | return id & mask; | |
626 | } | |
627 | ||
628 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 629 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
630 | { |
631 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
632 | unsigned int h; |
633 | ||
7d3f0cd4 GF |
634 | if (!id) |
635 | return NULL; | |
636 | ||
6fe1c7a5 | 637 | h = qdisc_class_hash(id, hash->hashmask); |
b67bfe0d | 638 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
639 | if (cl->classid == id) |
640 | return cl; | |
641 | } | |
642 | return NULL; | |
643 | } | |
644 | ||
384c181e AN |
645 | static inline int tc_classid_to_hwtc(struct net_device *dev, u32 classid) |
646 | { | |
647 | u32 hwtc = TC_H_MIN(classid) - TC_H_MIN_PRIORITY; | |
648 | ||
649 | return (hwtc < netdev_get_num_tc(dev)) ? hwtc : -EINVAL; | |
650 | } | |
651 | ||
5c15257f JP |
652 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
653 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, | |
654 | struct Qdisc_class_common *); | |
655 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, | |
656 | struct Qdisc_class_common *); | |
657 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
658 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
659 | ||
48bfd55e | 660 | int dev_qdisc_change_tx_queue_len(struct net_device *dev); |
1e080f17 JK |
661 | void dev_qdisc_change_real_num_tx(struct net_device *dev, |
662 | unsigned int new_real_tx); | |
5c15257f JP |
663 | void dev_init_scheduler(struct net_device *dev); |
664 | void dev_shutdown(struct net_device *dev); | |
665 | void dev_activate(struct net_device *dev); | |
666 | void dev_deactivate(struct net_device *dev); | |
667 | void dev_deactivate_many(struct list_head *head); | |
668 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, | |
669 | struct Qdisc *qdisc); | |
670 | void qdisc_reset(struct Qdisc *qdisc); | |
86bd446b | 671 | void qdisc_put(struct Qdisc *qdisc); |
3a7d0d07 | 672 | void qdisc_put_unlocked(struct Qdisc *qdisc); |
5f2939d9 | 673 | void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, int n, int len); |
b592843c JK |
674 | #ifdef CONFIG_NET_SCHED |
675 | int qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type, | |
676 | void *type_data); | |
bfaee911 JK |
677 | void qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch, |
678 | struct Qdisc *new, struct Qdisc *old, | |
679 | enum tc_setup_type type, void *type_data, | |
680 | struct netlink_ext_ack *extack); | |
b592843c JK |
681 | #else |
682 | static inline int | |
683 | qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type, | |
684 | void *type_data) | |
685 | { | |
686 | q->flags &= ~TCQ_F_OFFLOADED; | |
687 | return 0; | |
688 | } | |
bfaee911 JK |
689 | |
690 | static inline void | |
691 | qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch, | |
692 | struct Qdisc *new, struct Qdisc *old, | |
693 | enum tc_setup_type type, void *type_data, | |
694 | struct netlink_ext_ack *extack) | |
695 | { | |
696 | } | |
b592843c | 697 | #endif |
5c15257f | 698 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
d0bd684d AA |
699 | const struct Qdisc_ops *ops, |
700 | struct netlink_ext_ack *extack); | |
81d947e2 | 701 | void qdisc_free(struct Qdisc *qdisc); |
5c15257f | 702 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
a38a9882 AA |
703 | const struct Qdisc_ops *ops, u32 parentid, |
704 | struct netlink_ext_ack *extack); | |
5c15257f JP |
705 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
706 | const struct qdisc_size_table *stab); | |
27b29f63 | 707 | int skb_do_redirect(struct sk_buff *); |
1da177e4 | 708 | |
fdc5432a DB |
709 | static inline bool skb_at_tc_ingress(const struct sk_buff *skb) |
710 | { | |
711 | #ifdef CONFIG_NET_CLS_ACT | |
8dc07fdb | 712 | return skb->tc_at_ingress; |
fdc5432a DB |
713 | #else |
714 | return false; | |
715 | #endif | |
716 | } | |
717 | ||
e7246e12 WB |
718 | static inline bool skb_skip_tc_classify(struct sk_buff *skb) |
719 | { | |
720 | #ifdef CONFIG_NET_CLS_ACT | |
721 | if (skb->tc_skip_classify) { | |
722 | skb->tc_skip_classify = 0; | |
723 | return true; | |
724 | } | |
725 | #endif | |
726 | return false; | |
727 | } | |
728 | ||
3a053b1a | 729 | /* Reset all TX qdiscs greater than index of a device. */ |
f0796d5c | 730 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) |
5aa70995 | 731 | { |
4ef6acff JF |
732 | struct Qdisc *qdisc; |
733 | ||
f0796d5c | 734 | for (; i < dev->num_tx_queues; i++) { |
46e5da40 | 735 | qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc); |
4ef6acff JF |
736 | if (qdisc) { |
737 | spin_lock_bh(qdisc_lock(qdisc)); | |
738 | qdisc_reset(qdisc); | |
739 | spin_unlock_bh(qdisc_lock(qdisc)); | |
740 | } | |
741 | } | |
5aa70995 DM |
742 | } |
743 | ||
3e745dd6 DM |
744 | /* Are all TX queues of the device empty? */ |
745 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
746 | { | |
e8a0464c | 747 | unsigned int i; |
46e5da40 JF |
748 | |
749 | rcu_read_lock(); | |
e8a0464c DM |
750 | for (i = 0; i < dev->num_tx_queues; i++) { |
751 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 752 | const struct Qdisc *q = rcu_dereference(txq->qdisc); |
3e745dd6 | 753 | |
1f5e6fdd | 754 | if (!qdisc_is_empty(q)) { |
46e5da40 | 755 | rcu_read_unlock(); |
e8a0464c | 756 | return false; |
46e5da40 | 757 | } |
e8a0464c | 758 | } |
46e5da40 | 759 | rcu_read_unlock(); |
e8a0464c | 760 | return true; |
3e745dd6 DM |
761 | } |
762 | ||
6fa9864b | 763 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 764 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 765 | { |
e8a0464c | 766 | unsigned int i; |
46e5da40 | 767 | |
e8a0464c DM |
768 | for (i = 0; i < dev->num_tx_queues; i++) { |
769 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 770 | if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping) |
e8a0464c DM |
771 | return true; |
772 | } | |
773 | return false; | |
6fa9864b DM |
774 | } |
775 | ||
e8a0464c | 776 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
777 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
778 | { | |
e8a0464c | 779 | unsigned int i; |
46e5da40 | 780 | |
e8a0464c DM |
781 | for (i = 0; i < dev->num_tx_queues; i++) { |
782 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 783 | if (rcu_access_pointer(txq->qdisc) != &noop_qdisc) |
e8a0464c DM |
784 | return false; |
785 | } | |
786 | return true; | |
05297949 DM |
787 | } |
788 | ||
bfe0d029 | 789 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 790 | { |
175f9c1b | 791 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
792 | } |
793 | ||
c27f339a | 794 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
795 | enum net_xmit_qdisc_t { |
796 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 797 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
798 | }; |
799 | ||
c27f339a | 800 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 801 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
802 | #else |
803 | #define net_xmit_drop_count(e) (1) | |
804 | #endif | |
805 | ||
a2da570d ED |
806 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
807 | const struct Qdisc *sch) | |
5f86173b | 808 | { |
3a682fbd | 809 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
810 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
811 | ||
812 | if (stab) | |
813 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 814 | #endif |
a2da570d ED |
815 | } |
816 | ||
ac5c66f2 | 817 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
520ac30f | 818 | struct sk_buff **to_free) |
a2da570d ED |
819 | { |
820 | qdisc_calculate_pkt_len(skb, sch); | |
ac5c66f2 | 821 | return sch->enqueue(skb, sch, to_free); |
5f86173b JK |
822 | } |
823 | ||
50dc9a85 | 824 | static inline void _bstats_update(struct gnet_stats_basic_sync *bstats, |
38040702 AV |
825 | __u64 bytes, __u32 packets) |
826 | { | |
67c9e627 | 827 | u64_stats_update_begin(&bstats->syncp); |
50dc9a85 AD |
828 | u64_stats_add(&bstats->bytes, bytes); |
829 | u64_stats_add(&bstats->packets, packets); | |
67c9e627 | 830 | u64_stats_update_end(&bstats->syncp); |
38040702 AV |
831 | } |
832 | ||
50dc9a85 | 833 | static inline void bstats_update(struct gnet_stats_basic_sync *bstats, |
bfe0d029 ED |
834 | const struct sk_buff *skb) |
835 | { | |
38040702 AV |
836 | _bstats_update(bstats, |
837 | qdisc_pkt_len(skb), | |
838 | skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1); | |
839 | } | |
840 | ||
24ea591d ED |
841 | static inline void qdisc_bstats_cpu_update(struct Qdisc *sch, |
842 | const struct sk_buff *skb) | |
843 | { | |
50dc9a85 | 844 | bstats_update(this_cpu_ptr(sch->cpu_bstats), skb); |
24ea591d ED |
845 | } |
846 | ||
bfe0d029 ED |
847 | static inline void qdisc_bstats_update(struct Qdisc *sch, |
848 | const struct sk_buff *skb) | |
bbd8a0d3 | 849 | { |
bfe0d029 | 850 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
851 | } |
852 | ||
25331d6c JF |
853 | static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch, |
854 | const struct sk_buff *skb) | |
855 | { | |
856 | sch->qstats.backlog -= qdisc_pkt_len(skb); | |
857 | } | |
858 | ||
40bd0362 JF |
859 | static inline void qdisc_qstats_cpu_backlog_dec(struct Qdisc *sch, |
860 | const struct sk_buff *skb) | |
861 | { | |
862 | this_cpu_sub(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
863 | } | |
864 | ||
25331d6c JF |
865 | static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch, |
866 | const struct sk_buff *skb) | |
867 | { | |
868 | sch->qstats.backlog += qdisc_pkt_len(skb); | |
869 | } | |
870 | ||
40bd0362 JF |
871 | static inline void qdisc_qstats_cpu_backlog_inc(struct Qdisc *sch, |
872 | const struct sk_buff *skb) | |
873 | { | |
874 | this_cpu_add(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
875 | } | |
876 | ||
73eb628d | 877 | static inline void qdisc_qstats_cpu_qlen_inc(struct Qdisc *sch) |
40bd0362 | 878 | { |
73eb628d | 879 | this_cpu_inc(sch->cpu_qstats->qlen); |
40bd0362 JF |
880 | } |
881 | ||
73eb628d | 882 | static inline void qdisc_qstats_cpu_qlen_dec(struct Qdisc *sch) |
40bd0362 | 883 | { |
73eb628d | 884 | this_cpu_dec(sch->cpu_qstats->qlen); |
40bd0362 JF |
885 | } |
886 | ||
887 | static inline void qdisc_qstats_cpu_requeues_inc(struct Qdisc *sch) | |
888 | { | |
889 | this_cpu_inc(sch->cpu_qstats->requeues); | |
890 | } | |
891 | ||
25331d6c JF |
892 | static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count) |
893 | { | |
894 | sch->qstats.drops += count; | |
895 | } | |
896 | ||
24ea591d | 897 | static inline void qstats_drop_inc(struct gnet_stats_queue *qstats) |
25331d6c | 898 | { |
24ea591d | 899 | qstats->drops++; |
25331d6c JF |
900 | } |
901 | ||
24ea591d | 902 | static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats) |
b0ab6f92 | 903 | { |
24ea591d ED |
904 | qstats->overlimits++; |
905 | } | |
b0ab6f92 | 906 | |
24ea591d ED |
907 | static inline void qdisc_qstats_drop(struct Qdisc *sch) |
908 | { | |
909 | qstats_drop_inc(&sch->qstats); | |
910 | } | |
911 | ||
912 | static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch) | |
913 | { | |
eb60a8dd | 914 | this_cpu_inc(sch->cpu_qstats->drops); |
b0ab6f92 JF |
915 | } |
916 | ||
25331d6c JF |
917 | static inline void qdisc_qstats_overlimit(struct Qdisc *sch) |
918 | { | |
919 | sch->qstats.overlimits++; | |
920 | } | |
921 | ||
5dd431b6 PA |
922 | static inline int qdisc_qstats_copy(struct gnet_dump *d, struct Qdisc *sch) |
923 | { | |
924 | __u32 qlen = qdisc_qlen_sum(sch); | |
925 | ||
926 | return gnet_stats_copy_queue(d, sch->cpu_qstats, &sch->qstats, qlen); | |
927 | } | |
928 | ||
929 | static inline void qdisc_qstats_qlen_backlog(struct Qdisc *sch, __u32 *qlen, | |
930 | __u32 *backlog) | |
931 | { | |
932 | struct gnet_stats_queue qstats = { 0 }; | |
5dd431b6 | 933 | |
10940eb7 SAS |
934 | gnet_stats_add_queue(&qstats, sch->cpu_qstats, &sch->qstats); |
935 | *qlen = qstats.qlen + qdisc_qlen(sch); | |
5dd431b6 PA |
936 | *backlog = qstats.backlog; |
937 | } | |
938 | ||
e5f0e8f8 PA |
939 | static inline void qdisc_tree_flush_backlog(struct Qdisc *sch) |
940 | { | |
941 | __u32 qlen, backlog; | |
942 | ||
943 | qdisc_qstats_qlen_backlog(sch, &qlen, &backlog); | |
944 | qdisc_tree_reduce_backlog(sch, qlen, backlog); | |
945 | } | |
946 | ||
947 | static inline void qdisc_purge_queue(struct Qdisc *sch) | |
948 | { | |
949 | __u32 qlen, backlog; | |
950 | ||
951 | qdisc_qstats_qlen_backlog(sch, &qlen, &backlog); | |
952 | qdisc_reset(sch); | |
953 | qdisc_tree_reduce_backlog(sch, qlen, backlog); | |
954 | } | |
955 | ||
48da34b7 FW |
956 | static inline void qdisc_skb_head_init(struct qdisc_skb_head *qh) |
957 | { | |
958 | qh->head = NULL; | |
959 | qh->tail = NULL; | |
960 | qh->qlen = 0; | |
961 | } | |
962 | ||
aea890b8 DM |
963 | static inline void __qdisc_enqueue_tail(struct sk_buff *skb, |
964 | struct qdisc_skb_head *qh) | |
9972b25d | 965 | { |
48da34b7 FW |
966 | struct sk_buff *last = qh->tail; |
967 | ||
968 | if (last) { | |
969 | skb->next = NULL; | |
970 | last->next = skb; | |
971 | qh->tail = skb; | |
972 | } else { | |
973 | qh->tail = skb; | |
974 | qh->head = skb; | |
975 | } | |
976 | qh->qlen++; | |
9972b25d TG |
977 | } |
978 | ||
979 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
980 | { | |
aea890b8 DM |
981 | __qdisc_enqueue_tail(skb, &sch->q); |
982 | qdisc_qstats_backlog_inc(sch, skb); | |
983 | return NET_XMIT_SUCCESS; | |
9972b25d TG |
984 | } |
985 | ||
59697730 DM |
986 | static inline void __qdisc_enqueue_head(struct sk_buff *skb, |
987 | struct qdisc_skb_head *qh) | |
988 | { | |
989 | skb->next = qh->head; | |
990 | ||
991 | if (!qh->head) | |
992 | qh->tail = skb; | |
993 | qh->head = skb; | |
994 | qh->qlen++; | |
995 | } | |
996 | ||
48da34b7 | 997 | static inline struct sk_buff *__qdisc_dequeue_head(struct qdisc_skb_head *qh) |
9972b25d | 998 | { |
48da34b7 FW |
999 | struct sk_buff *skb = qh->head; |
1000 | ||
1001 | if (likely(skb != NULL)) { | |
1002 | qh->head = skb->next; | |
1003 | qh->qlen--; | |
1004 | if (qh->head == NULL) | |
1005 | qh->tail = NULL; | |
1006 | skb->next = NULL; | |
1007 | } | |
9972b25d | 1008 | |
ec323368 FW |
1009 | return skb; |
1010 | } | |
1011 | ||
1012 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
1013 | { | |
1014 | struct sk_buff *skb = __qdisc_dequeue_head(&sch->q); | |
1015 | ||
9190b3b3 | 1016 | if (likely(skb != NULL)) { |
25331d6c | 1017 | qdisc_qstats_backlog_dec(sch, skb); |
9190b3b3 ED |
1018 | qdisc_bstats_update(sch, skb); |
1019 | } | |
9972b25d TG |
1020 | |
1021 | return skb; | |
1022 | } | |
1023 | ||
520ac30f ED |
1024 | /* Instead of calling kfree_skb() while root qdisc lock is held, |
1025 | * queue the skb for future freeing at end of __dev_xmit_skb() | |
1026 | */ | |
1027 | static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free) | |
1028 | { | |
1029 | skb->next = *to_free; | |
1030 | *to_free = skb; | |
1031 | } | |
1032 | ||
35d889d1 AK |
1033 | static inline void __qdisc_drop_all(struct sk_buff *skb, |
1034 | struct sk_buff **to_free) | |
1035 | { | |
1036 | if (skb->prev) | |
1037 | skb->prev->next = *to_free; | |
1038 | else | |
1039 | skb->next = *to_free; | |
1040 | *to_free = skb; | |
1041 | } | |
1042 | ||
57dbb2d8 | 1043 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, |
48da34b7 | 1044 | struct qdisc_skb_head *qh, |
520ac30f | 1045 | struct sk_buff **to_free) |
57dbb2d8 | 1046 | { |
48da34b7 | 1047 | struct sk_buff *skb = __qdisc_dequeue_head(qh); |
57dbb2d8 HPP |
1048 | |
1049 | if (likely(skb != NULL)) { | |
1050 | unsigned int len = qdisc_pkt_len(skb); | |
520ac30f | 1051 | |
25331d6c | 1052 | qdisc_qstats_backlog_dec(sch, skb); |
520ac30f | 1053 | __qdisc_drop(skb, to_free); |
57dbb2d8 HPP |
1054 | return len; |
1055 | } | |
1056 | ||
1057 | return 0; | |
1058 | } | |
1059 | ||
48a8f519 PM |
1060 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
1061 | { | |
48da34b7 FW |
1062 | const struct qdisc_skb_head *qh = &sch->q; |
1063 | ||
1064 | return qh->head; | |
48a8f519 PM |
1065 | } |
1066 | ||
77be155c JP |
1067 | /* generic pseudo peek method for non-work-conserving qdisc */ |
1068 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
1069 | { | |
a53851e2 JF |
1070 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
1071 | ||
77be155c | 1072 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ |
a53851e2 JF |
1073 | if (!skb) { |
1074 | skb = sch->dequeue(sch); | |
1075 | ||
1076 | if (skb) { | |
1077 | __skb_queue_head(&sch->gso_skb, skb); | |
61c9eaf9 | 1078 | /* it's still part of the queue */ |
a53851e2 | 1079 | qdisc_qstats_backlog_inc(sch, skb); |
61c9eaf9 | 1080 | sch->q.qlen++; |
a27758ff | 1081 | } |
61c9eaf9 | 1082 | } |
77be155c | 1083 | |
a53851e2 | 1084 | return skb; |
77be155c JP |
1085 | } |
1086 | ||
8a53e616 PA |
1087 | static inline void qdisc_update_stats_at_dequeue(struct Qdisc *sch, |
1088 | struct sk_buff *skb) | |
1089 | { | |
1090 | if (qdisc_is_percpu_stats(sch)) { | |
1091 | qdisc_qstats_cpu_backlog_dec(sch, skb); | |
1092 | qdisc_bstats_cpu_update(sch, skb); | |
73eb628d | 1093 | qdisc_qstats_cpu_qlen_dec(sch); |
8a53e616 PA |
1094 | } else { |
1095 | qdisc_qstats_backlog_dec(sch, skb); | |
1096 | qdisc_bstats_update(sch, skb); | |
1097 | sch->q.qlen--; | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | static inline void qdisc_update_stats_at_enqueue(struct Qdisc *sch, | |
1102 | unsigned int pkt_len) | |
1103 | { | |
1104 | if (qdisc_is_percpu_stats(sch)) { | |
73eb628d | 1105 | qdisc_qstats_cpu_qlen_inc(sch); |
8a53e616 PA |
1106 | this_cpu_add(sch->cpu_qstats->backlog, pkt_len); |
1107 | } else { | |
1108 | sch->qstats.backlog += pkt_len; | |
1109 | sch->q.qlen++; | |
1110 | } | |
1111 | } | |
1112 | ||
77be155c JP |
1113 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ |
1114 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
1115 | { | |
a53851e2 | 1116 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
77be155c | 1117 | |
61c9eaf9 | 1118 | if (skb) { |
a53851e2 | 1119 | skb = __skb_dequeue(&sch->gso_skb); |
9c01c9f1 PA |
1120 | if (qdisc_is_percpu_stats(sch)) { |
1121 | qdisc_qstats_cpu_backlog_dec(sch, skb); | |
73eb628d | 1122 | qdisc_qstats_cpu_qlen_dec(sch); |
9c01c9f1 PA |
1123 | } else { |
1124 | qdisc_qstats_backlog_dec(sch, skb); | |
1125 | sch->q.qlen--; | |
1126 | } | |
61c9eaf9 | 1127 | } else { |
77be155c | 1128 | skb = sch->dequeue(sch); |
61c9eaf9 | 1129 | } |
77be155c JP |
1130 | |
1131 | return skb; | |
1132 | } | |
1133 | ||
48da34b7 | 1134 | static inline void __qdisc_reset_queue(struct qdisc_skb_head *qh) |
9972b25d TG |
1135 | { |
1136 | /* | |
1137 | * We do not know the backlog in bytes of this list, it | |
1138 | * is up to the caller to correct it | |
1139 | */ | |
48da34b7 FW |
1140 | ASSERT_RTNL(); |
1141 | if (qh->qlen) { | |
1142 | rtnl_kfree_skbs(qh->head, qh->tail); | |
1143 | ||
1144 | qh->head = NULL; | |
1145 | qh->tail = NULL; | |
1146 | qh->qlen = 0; | |
1b5c5493 | 1147 | } |
9972b25d TG |
1148 | } |
1149 | ||
1150 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
1151 | { | |
1b5c5493 | 1152 | __qdisc_reset_queue(&sch->q); |
9972b25d TG |
1153 | sch->qstats.backlog = 0; |
1154 | } | |
1155 | ||
86a7996c WC |
1156 | static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, |
1157 | struct Qdisc **pold) | |
1158 | { | |
1159 | struct Qdisc *old; | |
1160 | ||
1161 | sch_tree_lock(sch); | |
1162 | old = *pold; | |
1163 | *pold = new; | |
e5f0e8f8 | 1164 | if (old != NULL) |
938e0fcd | 1165 | qdisc_purge_queue(old); |
86a7996c WC |
1166 | sch_tree_unlock(sch); |
1167 | ||
1168 | return old; | |
1169 | } | |
1170 | ||
1b5c5493 ED |
1171 | static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) |
1172 | { | |
1173 | rtnl_kfree_skbs(skb, skb); | |
1174 | qdisc_qstats_drop(sch); | |
1175 | } | |
1176 | ||
40bd0362 JF |
1177 | static inline int qdisc_drop_cpu(struct sk_buff *skb, struct Qdisc *sch, |
1178 | struct sk_buff **to_free) | |
1179 | { | |
1180 | __qdisc_drop(skb, to_free); | |
1181 | qdisc_qstats_cpu_drop(sch); | |
1182 | ||
1183 | return NET_XMIT_DROP; | |
1184 | } | |
520ac30f ED |
1185 | |
1186 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch, | |
1187 | struct sk_buff **to_free) | |
9972b25d | 1188 | { |
520ac30f | 1189 | __qdisc_drop(skb, to_free); |
25331d6c | 1190 | qdisc_qstats_drop(sch); |
9972b25d TG |
1191 | |
1192 | return NET_XMIT_DROP; | |
1193 | } | |
1194 | ||
35d889d1 AK |
1195 | static inline int qdisc_drop_all(struct sk_buff *skb, struct Qdisc *sch, |
1196 | struct sk_buff **to_free) | |
1197 | { | |
1198 | __qdisc_drop_all(skb, to_free); | |
1199 | qdisc_qstats_drop(sch); | |
1200 | ||
1201 | return NET_XMIT_DROP; | |
1202 | } | |
1203 | ||
e9bef55d JDB |
1204 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
1205 | long it will take to send a packet given its size. | |
1206 | */ | |
1207 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
1208 | { | |
e08b0998 JDB |
1209 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
1210 | if (slot < 0) | |
1211 | slot = 0; | |
e9bef55d JDB |
1212 | slot >>= rtab->rate.cell_log; |
1213 | if (slot > 255) | |
a02cec21 | 1214 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
1215 | return rtab->data[slot]; |
1216 | } | |
1217 | ||
292f1c7f | 1218 | struct psched_ratecfg { |
130d3d68 | 1219 | u64 rate_bytes_ps; /* bytes per second */ |
01cb71d2 ED |
1220 | u32 mult; |
1221 | u16 overhead; | |
fb80445c | 1222 | u16 mpu; |
8a8e3d84 | 1223 | u8 linklayer; |
01cb71d2 | 1224 | u8 shift; |
292f1c7f JP |
1225 | }; |
1226 | ||
1227 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
1228 | unsigned int len) | |
1229 | { | |
8a8e3d84 JDB |
1230 | len += r->overhead; |
1231 | ||
fb80445c KB |
1232 | if (len < r->mpu) |
1233 | len = r->mpu; | |
1234 | ||
8a8e3d84 JDB |
1235 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) |
1236 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
1237 | ||
1238 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
1239 | } |
1240 | ||
5c15257f | 1241 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
3e1e3aae ED |
1242 | const struct tc_ratespec *conf, |
1243 | u64 rate64); | |
292f1c7f | 1244 | |
01cb71d2 ED |
1245 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
1246 | const struct psched_ratecfg *r) | |
292f1c7f | 1247 | { |
01cb71d2 | 1248 | memset(res, 0, sizeof(*res)); |
3e1e3aae ED |
1249 | |
1250 | /* legacy struct tc_ratespec has a 32bit @rate field | |
1251 | * Qdisc using 64bit rate should add new attributes | |
1252 | * in order to maintain compatibility. | |
1253 | */ | |
1254 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); | |
1255 | ||
01cb71d2 | 1256 | res->overhead = r->overhead; |
fb80445c | 1257 | res->mpu = r->mpu; |
8a8e3d84 | 1258 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
1259 | } |
1260 | ||
2ffe0395 BZ |
1261 | struct psched_pktrate { |
1262 | u64 rate_pkts_ps; /* packets per second */ | |
1263 | u32 mult; | |
1264 | u8 shift; | |
1265 | }; | |
1266 | ||
1267 | static inline u64 psched_pkt2t_ns(const struct psched_pktrate *r, | |
1268 | unsigned int pkt_num) | |
1269 | { | |
1270 | return ((u64)pkt_num * r->mult) >> r->shift; | |
1271 | } | |
1272 | ||
1273 | void psched_ppscfg_precompute(struct psched_pktrate *r, u64 pktrate64); | |
1274 | ||
46209401 JP |
1275 | /* Mini Qdisc serves for specific needs of ingress/clsact Qdisc. |
1276 | * The fast path only needs to access filter list and to update stats | |
1277 | */ | |
1278 | struct mini_Qdisc { | |
1279 | struct tcf_proto *filter_list; | |
7d17c544 | 1280 | struct tcf_block *block; |
50dc9a85 | 1281 | struct gnet_stats_basic_sync __percpu *cpu_bstats; |
46209401 | 1282 | struct gnet_stats_queue __percpu *cpu_qstats; |
26746382 | 1283 | unsigned long rcu_state; |
46209401 JP |
1284 | }; |
1285 | ||
1286 | static inline void mini_qdisc_bstats_cpu_update(struct mini_Qdisc *miniq, | |
1287 | const struct sk_buff *skb) | |
1288 | { | |
50dc9a85 | 1289 | bstats_update(this_cpu_ptr(miniq->cpu_bstats), skb); |
46209401 JP |
1290 | } |
1291 | ||
1292 | static inline void mini_qdisc_qstats_cpu_drop(struct mini_Qdisc *miniq) | |
1293 | { | |
1294 | this_cpu_inc(miniq->cpu_qstats->drops); | |
1295 | } | |
1296 | ||
1297 | struct mini_Qdisc_pair { | |
1298 | struct mini_Qdisc miniq1; | |
1299 | struct mini_Qdisc miniq2; | |
1300 | struct mini_Qdisc __rcu **p_miniq; | |
1301 | }; | |
1302 | ||
1303 | void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp, | |
1304 | struct tcf_proto *tp_head); | |
1305 | void mini_qdisc_pair_init(struct mini_Qdisc_pair *miniqp, struct Qdisc *qdisc, | |
1306 | struct mini_Qdisc __rcu **p_miniq); | |
7d17c544 PB |
1307 | void mini_qdisc_pair_block_init(struct mini_Qdisc_pair *miniqp, |
1308 | struct tcf_block *block); | |
46209401 | 1309 | |
f7116fb4 JK |
1310 | void mq_change_real_num_tx(struct Qdisc *sch, unsigned int new_real_tx); |
1311 | ||
c129412f | 1312 | int sch_frag_xmit_hook(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)); |
cd11b164 | 1313 | |
1da177e4 | 1314 | #endif |