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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 | 211 | |
2e8728c9 GF |
212 | /* spin_unlock() only has store-release semantic. The unlock |
213 | * and test_bit() ordering is a store-load ordering, so a full | |
214 | * memory barrier is needed here. | |
215 | */ | |
216 | smp_mb(); | |
217 | ||
a90c57f2 | 218 | if (unlikely(test_bit(__QDISC_STATE_MISSED, |
c4fef01b | 219 | &qdisc->state))) |
a90c57f2 | 220 | __netif_schedule(qdisc); |
dd25296a | 221 | } else { |
97604c65 | 222 | __clear_bit(__QDISC_STATE2_RUNNING, &qdisc->state2); |
a90c57f2 | 223 | } |
fd245a4a ED |
224 | } |
225 | ||
5772e9a3 JDB |
226 | static inline bool qdisc_may_bulk(const struct Qdisc *qdisc) |
227 | { | |
228 | return qdisc->flags & TCQ_F_ONETXQUEUE; | |
229 | } | |
230 | ||
231 | static inline int qdisc_avail_bulklimit(const struct netdev_queue *txq) | |
232 | { | |
233 | #ifdef CONFIG_BQL | |
234 | /* Non-BQL migrated drivers will return 0, too. */ | |
235 | return dql_avail(&txq->dql); | |
236 | #else | |
237 | return 0; | |
238 | #endif | |
239 | } | |
240 | ||
fd2c3ef7 | 241 | struct Qdisc_class_ops { |
dfcd2a2b | 242 | unsigned int flags; |
1da177e4 | 243 | /* Child qdisc manipulation */ |
926e61b7 | 244 | struct netdev_queue * (*select_queue)(struct Qdisc *, struct tcmsg *); |
1da177e4 | 245 | int (*graft)(struct Qdisc *, unsigned long cl, |
653d6fd6 AA |
246 | struct Qdisc *, struct Qdisc **, |
247 | struct netlink_ext_ack *extack); | |
1da177e4 | 248 | struct Qdisc * (*leaf)(struct Qdisc *, unsigned long cl); |
43effa1e | 249 | void (*qlen_notify)(struct Qdisc *, unsigned long); |
1da177e4 LT |
250 | |
251 | /* Class manipulation routines */ | |
143976ce | 252 | unsigned long (*find)(struct Qdisc *, u32 classid); |
1da177e4 | 253 | int (*change)(struct Qdisc *, u32, u32, |
793d81d6 AA |
254 | struct nlattr **, unsigned long *, |
255 | struct netlink_ext_ack *); | |
4dd78a73 MM |
256 | int (*delete)(struct Qdisc *, unsigned long, |
257 | struct netlink_ext_ack *); | |
1da177e4 LT |
258 | void (*walk)(struct Qdisc *, struct qdisc_walker * arg); |
259 | ||
260 | /* Filter manipulation */ | |
0ac4bd68 | 261 | struct tcf_block * (*tcf_block)(struct Qdisc *sch, |
cbaacc4e AA |
262 | unsigned long arg, |
263 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
264 | unsigned long (*bind_tcf)(struct Qdisc *, unsigned long, |
265 | u32 classid); | |
266 | void (*unbind_tcf)(struct Qdisc *, unsigned long); | |
267 | ||
268 | /* rtnetlink specific */ | |
269 | int (*dump)(struct Qdisc *, unsigned long, | |
270 | struct sk_buff *skb, struct tcmsg*); | |
271 | int (*dump_stats)(struct Qdisc *, unsigned long, | |
272 | struct gnet_dump *); | |
273 | }; | |
274 | ||
dfcd2a2b VB |
275 | /* Qdisc_class_ops flag values */ |
276 | ||
277 | /* Implements API that doesn't require rtnl lock */ | |
278 | enum qdisc_class_ops_flags { | |
279 | QDISC_CLASS_OPS_DOIT_UNLOCKED = 1, | |
280 | }; | |
281 | ||
fd2c3ef7 | 282 | struct Qdisc_ops { |
1da177e4 | 283 | struct Qdisc_ops *next; |
20fea08b | 284 | const struct Qdisc_class_ops *cl_ops; |
1da177e4 LT |
285 | char id[IFNAMSIZ]; |
286 | int priv_size; | |
d59f5ffa | 287 | unsigned int static_flags; |
1da177e4 | 288 | |
520ac30f ED |
289 | int (*enqueue)(struct sk_buff *skb, |
290 | struct Qdisc *sch, | |
291 | struct sk_buff **to_free); | |
1da177e4 | 292 | struct sk_buff * (*dequeue)(struct Qdisc *); |
90d841fd | 293 | struct sk_buff * (*peek)(struct Qdisc *); |
1da177e4 | 294 | |
e63d7dfd AA |
295 | int (*init)(struct Qdisc *sch, struct nlattr *arg, |
296 | struct netlink_ext_ack *extack); | |
1da177e4 LT |
297 | void (*reset)(struct Qdisc *); |
298 | void (*destroy)(struct Qdisc *); | |
0ac4bd68 | 299 | int (*change)(struct Qdisc *sch, |
2030721c AA |
300 | struct nlattr *arg, |
301 | struct netlink_ext_ack *extack); | |
0ac4bd68 | 302 | void (*attach)(struct Qdisc *sch); |
48bfd55e | 303 | int (*change_tx_queue_len)(struct Qdisc *, unsigned int); |
1e080f17 JK |
304 | void (*change_real_num_tx)(struct Qdisc *sch, |
305 | unsigned int new_real_tx); | |
1da177e4 LT |
306 | |
307 | int (*dump)(struct Qdisc *, struct sk_buff *); | |
308 | int (*dump_stats)(struct Qdisc *, struct gnet_dump *); | |
309 | ||
d47a6b0e JP |
310 | void (*ingress_block_set)(struct Qdisc *sch, |
311 | u32 block_index); | |
312 | void (*egress_block_set)(struct Qdisc *sch, | |
313 | u32 block_index); | |
314 | u32 (*ingress_block_get)(struct Qdisc *sch); | |
315 | u32 (*egress_block_get)(struct Qdisc *sch); | |
316 | ||
1da177e4 LT |
317 | struct module *owner; |
318 | }; | |
319 | ||
320 | ||
fd2c3ef7 | 321 | struct tcf_result { |
db50514f JP |
322 | union { |
323 | struct { | |
324 | unsigned long class; | |
325 | u32 classid; | |
326 | }; | |
327 | const struct tcf_proto *goto_tp; | |
cd11b164 | 328 | |
db50514f | 329 | }; |
1da177e4 LT |
330 | }; |
331 | ||
9f407f17 JP |
332 | struct tcf_chain; |
333 | ||
fd2c3ef7 | 334 | struct tcf_proto_ops { |
36272874 | 335 | struct list_head head; |
1da177e4 LT |
336 | char kind[IFNAMSIZ]; |
337 | ||
dc7f9f6e ED |
338 | int (*classify)(struct sk_buff *, |
339 | const struct tcf_proto *, | |
340 | struct tcf_result *); | |
1da177e4 | 341 | int (*init)(struct tcf_proto*); |
12db03b6 | 342 | void (*destroy)(struct tcf_proto *tp, bool rtnl_held, |
715df5ec | 343 | struct netlink_ext_ack *extack); |
1da177e4 | 344 | |
8113c095 | 345 | void* (*get)(struct tcf_proto*, u32 handle); |
7d5509fa | 346 | void (*put)(struct tcf_proto *tp, void *f); |
c1b52739 | 347 | int (*change)(struct net *net, struct sk_buff *, |
af4c6641 | 348 | struct tcf_proto*, unsigned long, |
add93b61 | 349 | u32 handle, struct nlattr **, |
695176bf | 350 | void **, u32, |
7306db38 | 351 | struct netlink_ext_ack *); |
8865fdd4 | 352 | int (*delete)(struct tcf_proto *tp, void *arg, |
12db03b6 | 353 | bool *last, bool rtnl_held, |
571acf21 | 354 | struct netlink_ext_ack *); |
a5b72a08 | 355 | bool (*delete_empty)(struct tcf_proto *tp); |
12db03b6 VB |
356 | void (*walk)(struct tcf_proto *tp, |
357 | struct tcf_walker *arg, bool rtnl_held); | |
e56185c7 | 358 | int (*reoffload)(struct tcf_proto *tp, bool add, |
a7323311 | 359 | flow_setup_cb_t *cb, void *cb_priv, |
e56185c7 | 360 | struct netlink_ext_ack *extack); |
a449a3e7 VB |
361 | void (*hw_add)(struct tcf_proto *tp, |
362 | void *type_data); | |
363 | void (*hw_del)(struct tcf_proto *tp, | |
364 | void *type_data); | |
2e24cd75 CW |
365 | void (*bind_class)(void *, u32, unsigned long, |
366 | void *, unsigned long); | |
9f407f17 JP |
367 | void * (*tmplt_create)(struct net *net, |
368 | struct tcf_chain *chain, | |
369 | struct nlattr **tca, | |
370 | struct netlink_ext_ack *extack); | |
371 | void (*tmplt_destroy)(void *tmplt_priv); | |
80cd22c3 PB |
372 | struct tcf_exts * (*get_exts)(const struct tcf_proto *tp, |
373 | u32 handle); | |
1da177e4 LT |
374 | |
375 | /* rtnetlink specific */ | |
8113c095 | 376 | int (*dump)(struct net*, struct tcf_proto*, void *, |
12db03b6 VB |
377 | struct sk_buff *skb, struct tcmsg*, |
378 | bool); | |
f8ab1807 VB |
379 | int (*terse_dump)(struct net *net, |
380 | struct tcf_proto *tp, void *fh, | |
381 | struct sk_buff *skb, | |
382 | struct tcmsg *t, bool rtnl_held); | |
9f407f17 JP |
383 | int (*tmplt_dump)(struct sk_buff *skb, |
384 | struct net *net, | |
385 | void *tmplt_priv); | |
1da177e4 LT |
386 | |
387 | struct module *owner; | |
12db03b6 VB |
388 | int flags; |
389 | }; | |
390 | ||
a5b72a08 DC |
391 | /* Classifiers setting TCF_PROTO_OPS_DOIT_UNLOCKED in tcf_proto_ops->flags |
392 | * are expected to implement tcf_proto_ops->delete_empty(), otherwise race | |
393 | * conditions can occur when filters are inserted/deleted simultaneously. | |
394 | */ | |
12db03b6 VB |
395 | enum tcf_proto_ops_flags { |
396 | TCF_PROTO_OPS_DOIT_UNLOCKED = 1, | |
1da177e4 LT |
397 | }; |
398 | ||
fd2c3ef7 | 399 | struct tcf_proto { |
1da177e4 | 400 | /* Fast access part */ |
25d8c0d5 JF |
401 | struct tcf_proto __rcu *next; |
402 | void __rcu *root; | |
7fd4b288 PA |
403 | |
404 | /* called under RCU BH lock*/ | |
dc7f9f6e ED |
405 | int (*classify)(struct sk_buff *, |
406 | const struct tcf_proto *, | |
407 | struct tcf_result *); | |
66c6f529 | 408 | __be16 protocol; |
1da177e4 LT |
409 | |
410 | /* All the rest */ | |
411 | u32 prio; | |
1da177e4 | 412 | void *data; |
dc7f9f6e | 413 | const struct tcf_proto_ops *ops; |
5bc17018 | 414 | struct tcf_chain *chain; |
8b64678e VB |
415 | /* Lock protects tcf_proto shared state and can be used by unlocked |
416 | * classifiers to protect their private data. | |
417 | */ | |
418 | spinlock_t lock; | |
419 | bool deleting; | |
4dbfa766 | 420 | refcount_t refcnt; |
25d8c0d5 | 421 | struct rcu_head rcu; |
59eb87cb | 422 | struct hlist_node destroy_ht_node; |
1da177e4 LT |
423 | }; |
424 | ||
175f9c1b | 425 | struct qdisc_skb_cb { |
089b19a9 SF |
426 | struct { |
427 | unsigned int pkt_len; | |
428 | u16 slave_dev_queue_mapping; | |
429 | u16 tc_classid; | |
d58e468b | 430 | }; |
25711786 ED |
431 | #define QDISC_CB_PRIV_LEN 20 |
432 | unsigned char data[QDISC_CB_PRIV_LEN]; | |
175f9c1b JK |
433 | }; |
434 | ||
c7eb7d72 JP |
435 | typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv); |
436 | ||
2190d1d0 | 437 | struct tcf_chain { |
ed76f5ed VB |
438 | /* Protects filter_chain. */ |
439 | struct mutex filter_chain_lock; | |
2190d1d0 | 440 | struct tcf_proto __rcu *filter_chain; |
5bc17018 JP |
441 | struct list_head list; |
442 | struct tcf_block *block; | |
443 | u32 index; /* chain index */ | |
444 | unsigned int refcnt; | |
1f3ed383 | 445 | unsigned int action_refcnt; |
32a4f5ec | 446 | bool explicitly_created; |
726d0612 | 447 | bool flushing; |
9f407f17 JP |
448 | const struct tcf_proto_ops *tmplt_ops; |
449 | void *tmplt_priv; | |
ee3bbfe8 | 450 | struct rcu_head rcu; |
6529eaba JP |
451 | }; |
452 | ||
2190d1d0 | 453 | struct tcf_block { |
c266f64d VB |
454 | /* Lock protects tcf_block and lifetime-management data of chains |
455 | * attached to the block (refcnt, action_refcnt, explicitly_created). | |
456 | */ | |
457 | struct mutex lock; | |
5bc17018 | 458 | struct list_head chain_list; |
48617387 | 459 | u32 index; /* block index for shared blocks */ |
a7df4870 | 460 | u32 classid; /* which class this block belongs to */ |
cfebd7e2 | 461 | refcount_t refcnt; |
855319be | 462 | struct net *net; |
69d78ef2 | 463 | struct Qdisc *q; |
4f8116c8 | 464 | struct rw_semaphore cb_lock; /* protects cb_list and offload counters */ |
14bfb13f | 465 | struct flow_block flow_block; |
f36fe1c4 JP |
466 | struct list_head owner_list; |
467 | bool keep_dst; | |
97394bef | 468 | atomic_t offloadcnt; /* Number of oddloaded filters */ |
caa72601 | 469 | unsigned int nooffloaddevcnt; /* Number of devs unable to do offload */ |
c9f14470 | 470 | unsigned int lockeddevcnt; /* Number of devs that require rtnl lock. */ |
f71e0ca4 JP |
471 | struct { |
472 | struct tcf_chain *chain; | |
473 | struct list_head filter_chain_list; | |
474 | } chain0; | |
0607e439 | 475 | struct rcu_head rcu; |
59eb87cb JH |
476 | DECLARE_HASHTABLE(proto_destroy_ht, 7); |
477 | struct mutex proto_destroy_lock; /* Lock for proto_destroy hashtable. */ | |
2190d1d0 JP |
478 | }; |
479 | ||
ed76f5ed VB |
480 | static inline bool lockdep_tcf_chain_is_locked(struct tcf_chain *chain) |
481 | { | |
482 | return lockdep_is_held(&chain->filter_chain_lock); | |
483 | } | |
8b64678e VB |
484 | |
485 | static inline bool lockdep_tcf_proto_is_locked(struct tcf_proto *tp) | |
486 | { | |
487 | return lockdep_is_held(&tp->lock); | |
488 | } | |
ed76f5ed VB |
489 | |
490 | #define tcf_chain_dereference(p, chain) \ | |
491 | rcu_dereference_protected(p, lockdep_tcf_chain_is_locked(chain)) | |
492 | ||
8b64678e VB |
493 | #define tcf_proto_dereference(p, tp) \ |
494 | rcu_dereference_protected(p, lockdep_tcf_proto_is_locked(tp)) | |
495 | ||
16bda13d DM |
496 | static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) |
497 | { | |
498 | struct qdisc_skb_cb *qcb; | |
5ee31c68 | 499 | |
038ebb1a | 500 | BUILD_BUG_ON(sizeof(skb->cb) < sizeof(*qcb)); |
16bda13d DM |
501 | BUILD_BUG_ON(sizeof(qcb->data) < sz); |
502 | } | |
503 | ||
05bdd2f1 | 504 | static inline int qdisc_qlen(const struct Qdisc *q) |
bbd8a0d3 KK |
505 | { |
506 | return q->q.qlen; | |
507 | } | |
508 | ||
73eb628d | 509 | static inline int qdisc_qlen_sum(const struct Qdisc *q) |
7e66016f | 510 | { |
73eb628d PA |
511 | __u32 qlen = q->qstats.qlen; |
512 | int i; | |
7e66016f | 513 | |
73eb628d PA |
514 | if (qdisc_is_percpu_stats(q)) { |
515 | for_each_possible_cpu(i) | |
516 | qlen += per_cpu_ptr(q->cpu_qstats, i)->qlen; | |
517 | } else { | |
6172abc1 | 518 | qlen += q->q.qlen; |
73eb628d | 519 | } |
7e66016f JF |
520 | |
521 | return qlen; | |
522 | } | |
523 | ||
bfe0d029 | 524 | static inline struct qdisc_skb_cb *qdisc_skb_cb(const struct sk_buff *skb) |
175f9c1b JK |
525 | { |
526 | return (struct qdisc_skb_cb *)skb->cb; | |
527 | } | |
528 | ||
83874000 DM |
529 | static inline spinlock_t *qdisc_lock(struct Qdisc *qdisc) |
530 | { | |
531 | return &qdisc->q.lock; | |
532 | } | |
533 | ||
05bdd2f1 | 534 | static inline struct Qdisc *qdisc_root(const struct Qdisc *qdisc) |
7698b4fc | 535 | { |
46e5da40 JF |
536 | struct Qdisc *q = rcu_dereference_rtnl(qdisc->dev_queue->qdisc); |
537 | ||
538 | return q; | |
7698b4fc DM |
539 | } |
540 | ||
159d2c7d ED |
541 | static inline struct Qdisc *qdisc_root_bh(const struct Qdisc *qdisc) |
542 | { | |
543 | return rcu_dereference_bh(qdisc->dev_queue->qdisc); | |
544 | } | |
545 | ||
05bdd2f1 | 546 | static inline struct Qdisc *qdisc_root_sleeping(const struct Qdisc *qdisc) |
2540e051 JP |
547 | { |
548 | return qdisc->dev_queue->qdisc_sleeping; | |
549 | } | |
550 | ||
05bdd2f1 | 551 | static inline spinlock_t *qdisc_root_sleeping_lock(const struct Qdisc *qdisc) |
f6f9b93f JP |
552 | { |
553 | struct Qdisc *root = qdisc_root_sleeping(qdisc); | |
554 | ||
555 | ASSERT_RTNL(); | |
556 | return qdisc_lock(root); | |
557 | } | |
558 | ||
05bdd2f1 | 559 | static inline struct net_device *qdisc_dev(const struct Qdisc *qdisc) |
5ce2d488 DM |
560 | { |
561 | return qdisc->dev_queue->dev; | |
562 | } | |
1da177e4 | 563 | |
ca1e4ab1 | 564 | static inline void sch_tree_lock(struct Qdisc *q) |
78a5b30b | 565 | { |
ca1e4ab1 MM |
566 | if (q->flags & TCQ_F_MQROOT) |
567 | spin_lock_bh(qdisc_lock(q)); | |
568 | else | |
569 | spin_lock_bh(qdisc_root_sleeping_lock(q)); | |
78a5b30b DM |
570 | } |
571 | ||
ca1e4ab1 | 572 | static inline void sch_tree_unlock(struct Qdisc *q) |
78a5b30b | 573 | { |
ca1e4ab1 MM |
574 | if (q->flags & TCQ_F_MQROOT) |
575 | spin_unlock_bh(qdisc_lock(q)); | |
576 | else | |
577 | spin_unlock_bh(qdisc_root_sleeping_lock(q)); | |
78a5b30b DM |
578 | } |
579 | ||
e41a33e6 TG |
580 | extern struct Qdisc noop_qdisc; |
581 | extern struct Qdisc_ops noop_qdisc_ops; | |
6ec1c69a DM |
582 | extern struct Qdisc_ops pfifo_fast_ops; |
583 | extern struct Qdisc_ops mq_qdisc_ops; | |
d66d6c31 | 584 | extern struct Qdisc_ops noqueue_qdisc_ops; |
6da7c8fc | 585 | extern const struct Qdisc_ops *default_qdisc_ops; |
1f27cde3 ED |
586 | static inline const struct Qdisc_ops * |
587 | get_default_qdisc_ops(const struct net_device *dev, int ntx) | |
588 | { | |
589 | return ntx < dev->real_num_tx_queues ? | |
590 | default_qdisc_ops : &pfifo_fast_ops; | |
591 | } | |
e41a33e6 | 592 | |
fd2c3ef7 | 593 | struct Qdisc_class_common { |
6fe1c7a5 PM |
594 | u32 classid; |
595 | struct hlist_node hnode; | |
596 | }; | |
597 | ||
fd2c3ef7 | 598 | struct Qdisc_class_hash { |
6fe1c7a5 PM |
599 | struct hlist_head *hash; |
600 | unsigned int hashsize; | |
601 | unsigned int hashmask; | |
602 | unsigned int hashelems; | |
603 | }; | |
604 | ||
605 | static inline unsigned int qdisc_class_hash(u32 id, u32 mask) | |
606 | { | |
607 | id ^= id >> 8; | |
608 | id ^= id >> 4; | |
609 | return id & mask; | |
610 | } | |
611 | ||
612 | static inline struct Qdisc_class_common * | |
05bdd2f1 | 613 | qdisc_class_find(const struct Qdisc_class_hash *hash, u32 id) |
6fe1c7a5 PM |
614 | { |
615 | struct Qdisc_class_common *cl; | |
6fe1c7a5 PM |
616 | unsigned int h; |
617 | ||
7d3f0cd4 GF |
618 | if (!id) |
619 | return NULL; | |
620 | ||
6fe1c7a5 | 621 | h = qdisc_class_hash(id, hash->hashmask); |
b67bfe0d | 622 | hlist_for_each_entry(cl, &hash->hash[h], hnode) { |
6fe1c7a5 PM |
623 | if (cl->classid == id) |
624 | return cl; | |
625 | } | |
626 | return NULL; | |
627 | } | |
628 | ||
384c181e AN |
629 | static inline int tc_classid_to_hwtc(struct net_device *dev, u32 classid) |
630 | { | |
631 | u32 hwtc = TC_H_MIN(classid) - TC_H_MIN_PRIORITY; | |
632 | ||
633 | return (hwtc < netdev_get_num_tc(dev)) ? hwtc : -EINVAL; | |
634 | } | |
635 | ||
5c15257f JP |
636 | int qdisc_class_hash_init(struct Qdisc_class_hash *); |
637 | void qdisc_class_hash_insert(struct Qdisc_class_hash *, | |
638 | struct Qdisc_class_common *); | |
639 | void qdisc_class_hash_remove(struct Qdisc_class_hash *, | |
640 | struct Qdisc_class_common *); | |
641 | void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *); | |
642 | void qdisc_class_hash_destroy(struct Qdisc_class_hash *); | |
643 | ||
48bfd55e | 644 | int dev_qdisc_change_tx_queue_len(struct net_device *dev); |
1e080f17 JK |
645 | void dev_qdisc_change_real_num_tx(struct net_device *dev, |
646 | unsigned int new_real_tx); | |
5c15257f JP |
647 | void dev_init_scheduler(struct net_device *dev); |
648 | void dev_shutdown(struct net_device *dev); | |
649 | void dev_activate(struct net_device *dev); | |
650 | void dev_deactivate(struct net_device *dev); | |
651 | void dev_deactivate_many(struct list_head *head); | |
652 | struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue, | |
653 | struct Qdisc *qdisc); | |
654 | void qdisc_reset(struct Qdisc *qdisc); | |
86bd446b | 655 | void qdisc_put(struct Qdisc *qdisc); |
3a7d0d07 | 656 | void qdisc_put_unlocked(struct Qdisc *qdisc); |
5f2939d9 | 657 | void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, int n, int len); |
b592843c JK |
658 | #ifdef CONFIG_NET_SCHED |
659 | int qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type, | |
660 | void *type_data); | |
bfaee911 JK |
661 | void qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch, |
662 | struct Qdisc *new, struct Qdisc *old, | |
663 | enum tc_setup_type type, void *type_data, | |
664 | struct netlink_ext_ack *extack); | |
b592843c JK |
665 | #else |
666 | static inline int | |
667 | qdisc_offload_dump_helper(struct Qdisc *q, enum tc_setup_type type, | |
668 | void *type_data) | |
669 | { | |
670 | q->flags &= ~TCQ_F_OFFLOADED; | |
671 | return 0; | |
672 | } | |
bfaee911 JK |
673 | |
674 | static inline void | |
675 | qdisc_offload_graft_helper(struct net_device *dev, struct Qdisc *sch, | |
676 | struct Qdisc *new, struct Qdisc *old, | |
677 | enum tc_setup_type type, void *type_data, | |
678 | struct netlink_ext_ack *extack) | |
679 | { | |
680 | } | |
b592843c | 681 | #endif |
aac4daa8 VO |
682 | void qdisc_offload_query_caps(struct net_device *dev, |
683 | enum tc_setup_type type, | |
684 | void *caps, size_t caps_len); | |
5c15257f | 685 | struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue, |
d0bd684d AA |
686 | const struct Qdisc_ops *ops, |
687 | struct netlink_ext_ack *extack); | |
81d947e2 | 688 | void qdisc_free(struct Qdisc *qdisc); |
5c15257f | 689 | struct Qdisc *qdisc_create_dflt(struct netdev_queue *dev_queue, |
a38a9882 AA |
690 | const struct Qdisc_ops *ops, u32 parentid, |
691 | struct netlink_ext_ack *extack); | |
5c15257f JP |
692 | void __qdisc_calculate_pkt_len(struct sk_buff *skb, |
693 | const struct qdisc_size_table *stab); | |
27b29f63 | 694 | int skb_do_redirect(struct sk_buff *); |
1da177e4 | 695 | |
fdc5432a DB |
696 | static inline bool skb_at_tc_ingress(const struct sk_buff *skb) |
697 | { | |
698 | #ifdef CONFIG_NET_CLS_ACT | |
8dc07fdb | 699 | return skb->tc_at_ingress; |
fdc5432a DB |
700 | #else |
701 | return false; | |
702 | #endif | |
703 | } | |
704 | ||
e7246e12 WB |
705 | static inline bool skb_skip_tc_classify(struct sk_buff *skb) |
706 | { | |
707 | #ifdef CONFIG_NET_CLS_ACT | |
708 | if (skb->tc_skip_classify) { | |
709 | skb->tc_skip_classify = 0; | |
710 | return true; | |
711 | } | |
712 | #endif | |
713 | return false; | |
714 | } | |
715 | ||
3a053b1a | 716 | /* Reset all TX qdiscs greater than index of a device. */ |
f0796d5c | 717 | static inline void qdisc_reset_all_tx_gt(struct net_device *dev, unsigned int i) |
5aa70995 | 718 | { |
4ef6acff JF |
719 | struct Qdisc *qdisc; |
720 | ||
f0796d5c | 721 | for (; i < dev->num_tx_queues; i++) { |
46e5da40 | 722 | qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc); |
4ef6acff JF |
723 | if (qdisc) { |
724 | spin_lock_bh(qdisc_lock(qdisc)); | |
725 | qdisc_reset(qdisc); | |
726 | spin_unlock_bh(qdisc_lock(qdisc)); | |
727 | } | |
728 | } | |
5aa70995 DM |
729 | } |
730 | ||
3e745dd6 DM |
731 | /* Are all TX queues of the device empty? */ |
732 | static inline bool qdisc_all_tx_empty(const struct net_device *dev) | |
733 | { | |
e8a0464c | 734 | unsigned int i; |
46e5da40 JF |
735 | |
736 | rcu_read_lock(); | |
e8a0464c DM |
737 | for (i = 0; i < dev->num_tx_queues; i++) { |
738 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 739 | const struct Qdisc *q = rcu_dereference(txq->qdisc); |
3e745dd6 | 740 | |
1f5e6fdd | 741 | if (!qdisc_is_empty(q)) { |
46e5da40 | 742 | rcu_read_unlock(); |
e8a0464c | 743 | return false; |
46e5da40 | 744 | } |
e8a0464c | 745 | } |
46e5da40 | 746 | rcu_read_unlock(); |
e8a0464c | 747 | return true; |
3e745dd6 DM |
748 | } |
749 | ||
6fa9864b | 750 | /* Are any of the TX qdiscs changing? */ |
05bdd2f1 | 751 | static inline bool qdisc_tx_changing(const struct net_device *dev) |
6fa9864b | 752 | { |
e8a0464c | 753 | unsigned int i; |
46e5da40 | 754 | |
e8a0464c DM |
755 | for (i = 0; i < dev->num_tx_queues; i++) { |
756 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
46e5da40 | 757 | if (rcu_access_pointer(txq->qdisc) != txq->qdisc_sleeping) |
e8a0464c DM |
758 | return true; |
759 | } | |
760 | return false; | |
6fa9864b DM |
761 | } |
762 | ||
e8a0464c | 763 | /* Is the device using the noop qdisc on all queues? */ |
05297949 DM |
764 | static inline bool qdisc_tx_is_noop(const struct net_device *dev) |
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) != &noop_qdisc) |
e8a0464c DM |
771 | return false; |
772 | } | |
773 | return true; | |
05297949 DM |
774 | } |
775 | ||
bfe0d029 | 776 | static inline unsigned int qdisc_pkt_len(const struct sk_buff *skb) |
0abf77e5 | 777 | { |
175f9c1b | 778 | return qdisc_skb_cb(skb)->pkt_len; |
0abf77e5 JK |
779 | } |
780 | ||
c27f339a | 781 | /* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */ |
378a2f09 JP |
782 | enum net_xmit_qdisc_t { |
783 | __NET_XMIT_STOLEN = 0x00010000, | |
c27f339a | 784 | __NET_XMIT_BYPASS = 0x00020000, |
378a2f09 JP |
785 | }; |
786 | ||
c27f339a | 787 | #ifdef CONFIG_NET_CLS_ACT |
378a2f09 | 788 | #define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1) |
378a2f09 JP |
789 | #else |
790 | #define net_xmit_drop_count(e) (1) | |
791 | #endif | |
792 | ||
a2da570d ED |
793 | static inline void qdisc_calculate_pkt_len(struct sk_buff *skb, |
794 | const struct Qdisc *sch) | |
5f86173b | 795 | { |
3a682fbd | 796 | #ifdef CONFIG_NET_SCHED |
a2da570d ED |
797 | struct qdisc_size_table *stab = rcu_dereference_bh(sch->stab); |
798 | ||
799 | if (stab) | |
800 | __qdisc_calculate_pkt_len(skb, stab); | |
3a682fbd | 801 | #endif |
a2da570d ED |
802 | } |
803 | ||
ac5c66f2 | 804 | static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
520ac30f | 805 | struct sk_buff **to_free) |
a2da570d ED |
806 | { |
807 | qdisc_calculate_pkt_len(skb, sch); | |
ac5c66f2 | 808 | return sch->enqueue(skb, sch, to_free); |
5f86173b JK |
809 | } |
810 | ||
50dc9a85 | 811 | static inline void _bstats_update(struct gnet_stats_basic_sync *bstats, |
38040702 AV |
812 | __u64 bytes, __u32 packets) |
813 | { | |
67c9e627 | 814 | u64_stats_update_begin(&bstats->syncp); |
50dc9a85 AD |
815 | u64_stats_add(&bstats->bytes, bytes); |
816 | u64_stats_add(&bstats->packets, packets); | |
67c9e627 | 817 | u64_stats_update_end(&bstats->syncp); |
38040702 AV |
818 | } |
819 | ||
50dc9a85 | 820 | static inline void bstats_update(struct gnet_stats_basic_sync *bstats, |
bfe0d029 ED |
821 | const struct sk_buff *skb) |
822 | { | |
38040702 AV |
823 | _bstats_update(bstats, |
824 | qdisc_pkt_len(skb), | |
825 | skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1); | |
826 | } | |
827 | ||
24ea591d ED |
828 | static inline void qdisc_bstats_cpu_update(struct Qdisc *sch, |
829 | const struct sk_buff *skb) | |
830 | { | |
50dc9a85 | 831 | bstats_update(this_cpu_ptr(sch->cpu_bstats), skb); |
24ea591d ED |
832 | } |
833 | ||
bfe0d029 ED |
834 | static inline void qdisc_bstats_update(struct Qdisc *sch, |
835 | const struct sk_buff *skb) | |
bbd8a0d3 | 836 | { |
bfe0d029 | 837 | bstats_update(&sch->bstats, skb); |
bbd8a0d3 KK |
838 | } |
839 | ||
25331d6c JF |
840 | static inline void qdisc_qstats_backlog_dec(struct Qdisc *sch, |
841 | const struct sk_buff *skb) | |
842 | { | |
843 | sch->qstats.backlog -= qdisc_pkt_len(skb); | |
844 | } | |
845 | ||
40bd0362 JF |
846 | static inline void qdisc_qstats_cpu_backlog_dec(struct Qdisc *sch, |
847 | const struct sk_buff *skb) | |
848 | { | |
849 | this_cpu_sub(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
850 | } | |
851 | ||
25331d6c JF |
852 | static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch, |
853 | const struct sk_buff *skb) | |
854 | { | |
855 | sch->qstats.backlog += qdisc_pkt_len(skb); | |
856 | } | |
857 | ||
40bd0362 JF |
858 | static inline void qdisc_qstats_cpu_backlog_inc(struct Qdisc *sch, |
859 | const struct sk_buff *skb) | |
860 | { | |
861 | this_cpu_add(sch->cpu_qstats->backlog, qdisc_pkt_len(skb)); | |
862 | } | |
863 | ||
73eb628d | 864 | static inline void qdisc_qstats_cpu_qlen_inc(struct Qdisc *sch) |
40bd0362 | 865 | { |
73eb628d | 866 | this_cpu_inc(sch->cpu_qstats->qlen); |
40bd0362 JF |
867 | } |
868 | ||
73eb628d | 869 | static inline void qdisc_qstats_cpu_qlen_dec(struct Qdisc *sch) |
40bd0362 | 870 | { |
73eb628d | 871 | this_cpu_dec(sch->cpu_qstats->qlen); |
40bd0362 JF |
872 | } |
873 | ||
874 | static inline void qdisc_qstats_cpu_requeues_inc(struct Qdisc *sch) | |
875 | { | |
876 | this_cpu_inc(sch->cpu_qstats->requeues); | |
877 | } | |
878 | ||
25331d6c JF |
879 | static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count) |
880 | { | |
881 | sch->qstats.drops += count; | |
882 | } | |
883 | ||
24ea591d | 884 | static inline void qstats_drop_inc(struct gnet_stats_queue *qstats) |
25331d6c | 885 | { |
24ea591d | 886 | qstats->drops++; |
25331d6c JF |
887 | } |
888 | ||
24ea591d | 889 | static inline void qstats_overlimit_inc(struct gnet_stats_queue *qstats) |
b0ab6f92 | 890 | { |
24ea591d ED |
891 | qstats->overlimits++; |
892 | } | |
b0ab6f92 | 893 | |
24ea591d ED |
894 | static inline void qdisc_qstats_drop(struct Qdisc *sch) |
895 | { | |
896 | qstats_drop_inc(&sch->qstats); | |
897 | } | |
898 | ||
899 | static inline void qdisc_qstats_cpu_drop(struct Qdisc *sch) | |
900 | { | |
eb60a8dd | 901 | this_cpu_inc(sch->cpu_qstats->drops); |
b0ab6f92 JF |
902 | } |
903 | ||
25331d6c JF |
904 | static inline void qdisc_qstats_overlimit(struct Qdisc *sch) |
905 | { | |
906 | sch->qstats.overlimits++; | |
907 | } | |
908 | ||
5dd431b6 PA |
909 | static inline int qdisc_qstats_copy(struct gnet_dump *d, struct Qdisc *sch) |
910 | { | |
911 | __u32 qlen = qdisc_qlen_sum(sch); | |
912 | ||
913 | return gnet_stats_copy_queue(d, sch->cpu_qstats, &sch->qstats, qlen); | |
914 | } | |
915 | ||
916 | static inline void qdisc_qstats_qlen_backlog(struct Qdisc *sch, __u32 *qlen, | |
917 | __u32 *backlog) | |
918 | { | |
919 | struct gnet_stats_queue qstats = { 0 }; | |
5dd431b6 | 920 | |
10940eb7 SAS |
921 | gnet_stats_add_queue(&qstats, sch->cpu_qstats, &sch->qstats); |
922 | *qlen = qstats.qlen + qdisc_qlen(sch); | |
5dd431b6 PA |
923 | *backlog = qstats.backlog; |
924 | } | |
925 | ||
e5f0e8f8 PA |
926 | static inline void qdisc_tree_flush_backlog(struct Qdisc *sch) |
927 | { | |
928 | __u32 qlen, backlog; | |
929 | ||
930 | qdisc_qstats_qlen_backlog(sch, &qlen, &backlog); | |
931 | qdisc_tree_reduce_backlog(sch, qlen, backlog); | |
932 | } | |
933 | ||
934 | static inline void qdisc_purge_queue(struct Qdisc *sch) | |
935 | { | |
936 | __u32 qlen, backlog; | |
937 | ||
938 | qdisc_qstats_qlen_backlog(sch, &qlen, &backlog); | |
939 | qdisc_reset(sch); | |
940 | qdisc_tree_reduce_backlog(sch, qlen, backlog); | |
941 | } | |
942 | ||
aea890b8 DM |
943 | static inline void __qdisc_enqueue_tail(struct sk_buff *skb, |
944 | struct qdisc_skb_head *qh) | |
9972b25d | 945 | { |
48da34b7 FW |
946 | struct sk_buff *last = qh->tail; |
947 | ||
948 | if (last) { | |
949 | skb->next = NULL; | |
950 | last->next = skb; | |
951 | qh->tail = skb; | |
952 | } else { | |
953 | qh->tail = skb; | |
954 | qh->head = skb; | |
955 | } | |
956 | qh->qlen++; | |
9972b25d TG |
957 | } |
958 | ||
959 | static inline int qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch) | |
960 | { | |
aea890b8 DM |
961 | __qdisc_enqueue_tail(skb, &sch->q); |
962 | qdisc_qstats_backlog_inc(sch, skb); | |
963 | return NET_XMIT_SUCCESS; | |
9972b25d TG |
964 | } |
965 | ||
59697730 DM |
966 | static inline void __qdisc_enqueue_head(struct sk_buff *skb, |
967 | struct qdisc_skb_head *qh) | |
968 | { | |
969 | skb->next = qh->head; | |
970 | ||
971 | if (!qh->head) | |
972 | qh->tail = skb; | |
973 | qh->head = skb; | |
974 | qh->qlen++; | |
975 | } | |
976 | ||
48da34b7 | 977 | static inline struct sk_buff *__qdisc_dequeue_head(struct qdisc_skb_head *qh) |
9972b25d | 978 | { |
48da34b7 FW |
979 | struct sk_buff *skb = qh->head; |
980 | ||
981 | if (likely(skb != NULL)) { | |
982 | qh->head = skb->next; | |
983 | qh->qlen--; | |
984 | if (qh->head == NULL) | |
985 | qh->tail = NULL; | |
986 | skb->next = NULL; | |
987 | } | |
9972b25d | 988 | |
ec323368 FW |
989 | return skb; |
990 | } | |
991 | ||
992 | static inline struct sk_buff *qdisc_dequeue_head(struct Qdisc *sch) | |
993 | { | |
994 | struct sk_buff *skb = __qdisc_dequeue_head(&sch->q); | |
995 | ||
9190b3b3 | 996 | if (likely(skb != NULL)) { |
25331d6c | 997 | qdisc_qstats_backlog_dec(sch, skb); |
9190b3b3 ED |
998 | qdisc_bstats_update(sch, skb); |
999 | } | |
9972b25d TG |
1000 | |
1001 | return skb; | |
1002 | } | |
1003 | ||
520ac30f ED |
1004 | /* Instead of calling kfree_skb() while root qdisc lock is held, |
1005 | * queue the skb for future freeing at end of __dev_xmit_skb() | |
1006 | */ | |
1007 | static inline void __qdisc_drop(struct sk_buff *skb, struct sk_buff **to_free) | |
1008 | { | |
1009 | skb->next = *to_free; | |
1010 | *to_free = skb; | |
1011 | } | |
1012 | ||
35d889d1 AK |
1013 | static inline void __qdisc_drop_all(struct sk_buff *skb, |
1014 | struct sk_buff **to_free) | |
1015 | { | |
1016 | if (skb->prev) | |
1017 | skb->prev->next = *to_free; | |
1018 | else | |
1019 | skb->next = *to_free; | |
1020 | *to_free = skb; | |
1021 | } | |
1022 | ||
57dbb2d8 | 1023 | static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch, |
48da34b7 | 1024 | struct qdisc_skb_head *qh, |
520ac30f | 1025 | struct sk_buff **to_free) |
57dbb2d8 | 1026 | { |
48da34b7 | 1027 | struct sk_buff *skb = __qdisc_dequeue_head(qh); |
57dbb2d8 HPP |
1028 | |
1029 | if (likely(skb != NULL)) { | |
1030 | unsigned int len = qdisc_pkt_len(skb); | |
520ac30f | 1031 | |
25331d6c | 1032 | qdisc_qstats_backlog_dec(sch, skb); |
520ac30f | 1033 | __qdisc_drop(skb, to_free); |
57dbb2d8 HPP |
1034 | return len; |
1035 | } | |
1036 | ||
1037 | return 0; | |
1038 | } | |
1039 | ||
48a8f519 PM |
1040 | static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) |
1041 | { | |
48da34b7 FW |
1042 | const struct qdisc_skb_head *qh = &sch->q; |
1043 | ||
1044 | return qh->head; | |
48a8f519 PM |
1045 | } |
1046 | ||
77be155c JP |
1047 | /* generic pseudo peek method for non-work-conserving qdisc */ |
1048 | static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) | |
1049 | { | |
a53851e2 JF |
1050 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
1051 | ||
77be155c | 1052 | /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ |
a53851e2 JF |
1053 | if (!skb) { |
1054 | skb = sch->dequeue(sch); | |
1055 | ||
1056 | if (skb) { | |
1057 | __skb_queue_head(&sch->gso_skb, skb); | |
61c9eaf9 | 1058 | /* it's still part of the queue */ |
a53851e2 | 1059 | qdisc_qstats_backlog_inc(sch, skb); |
61c9eaf9 | 1060 | sch->q.qlen++; |
a27758ff | 1061 | } |
61c9eaf9 | 1062 | } |
77be155c | 1063 | |
a53851e2 | 1064 | return skb; |
77be155c JP |
1065 | } |
1066 | ||
8a53e616 PA |
1067 | static inline void qdisc_update_stats_at_dequeue(struct Qdisc *sch, |
1068 | struct sk_buff *skb) | |
1069 | { | |
1070 | if (qdisc_is_percpu_stats(sch)) { | |
1071 | qdisc_qstats_cpu_backlog_dec(sch, skb); | |
1072 | qdisc_bstats_cpu_update(sch, skb); | |
73eb628d | 1073 | qdisc_qstats_cpu_qlen_dec(sch); |
8a53e616 PA |
1074 | } else { |
1075 | qdisc_qstats_backlog_dec(sch, skb); | |
1076 | qdisc_bstats_update(sch, skb); | |
1077 | sch->q.qlen--; | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | static inline void qdisc_update_stats_at_enqueue(struct Qdisc *sch, | |
1082 | unsigned int pkt_len) | |
1083 | { | |
1084 | if (qdisc_is_percpu_stats(sch)) { | |
73eb628d | 1085 | qdisc_qstats_cpu_qlen_inc(sch); |
8a53e616 PA |
1086 | this_cpu_add(sch->cpu_qstats->backlog, pkt_len); |
1087 | } else { | |
1088 | sch->qstats.backlog += pkt_len; | |
1089 | sch->q.qlen++; | |
1090 | } | |
1091 | } | |
1092 | ||
77be155c JP |
1093 | /* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ |
1094 | static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) | |
1095 | { | |
a53851e2 | 1096 | struct sk_buff *skb = skb_peek(&sch->gso_skb); |
77be155c | 1097 | |
61c9eaf9 | 1098 | if (skb) { |
a53851e2 | 1099 | skb = __skb_dequeue(&sch->gso_skb); |
9c01c9f1 PA |
1100 | if (qdisc_is_percpu_stats(sch)) { |
1101 | qdisc_qstats_cpu_backlog_dec(sch, skb); | |
73eb628d | 1102 | qdisc_qstats_cpu_qlen_dec(sch); |
9c01c9f1 PA |
1103 | } else { |
1104 | qdisc_qstats_backlog_dec(sch, skb); | |
1105 | sch->q.qlen--; | |
1106 | } | |
61c9eaf9 | 1107 | } else { |
77be155c | 1108 | skb = sch->dequeue(sch); |
61c9eaf9 | 1109 | } |
77be155c JP |
1110 | |
1111 | return skb; | |
1112 | } | |
1113 | ||
48da34b7 | 1114 | static inline void __qdisc_reset_queue(struct qdisc_skb_head *qh) |
9972b25d TG |
1115 | { |
1116 | /* | |
1117 | * We do not know the backlog in bytes of this list, it | |
1118 | * is up to the caller to correct it | |
1119 | */ | |
48da34b7 FW |
1120 | ASSERT_RTNL(); |
1121 | if (qh->qlen) { | |
1122 | rtnl_kfree_skbs(qh->head, qh->tail); | |
1123 | ||
1124 | qh->head = NULL; | |
1125 | qh->tail = NULL; | |
1126 | qh->qlen = 0; | |
1b5c5493 | 1127 | } |
9972b25d TG |
1128 | } |
1129 | ||
1130 | static inline void qdisc_reset_queue(struct Qdisc *sch) | |
1131 | { | |
1b5c5493 | 1132 | __qdisc_reset_queue(&sch->q); |
9972b25d TG |
1133 | } |
1134 | ||
86a7996c WC |
1135 | static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, |
1136 | struct Qdisc **pold) | |
1137 | { | |
1138 | struct Qdisc *old; | |
1139 | ||
1140 | sch_tree_lock(sch); | |
1141 | old = *pold; | |
1142 | *pold = new; | |
e5f0e8f8 | 1143 | if (old != NULL) |
938e0fcd | 1144 | qdisc_purge_queue(old); |
86a7996c WC |
1145 | sch_tree_unlock(sch); |
1146 | ||
1147 | return old; | |
1148 | } | |
1149 | ||
1b5c5493 ED |
1150 | static inline void rtnl_qdisc_drop(struct sk_buff *skb, struct Qdisc *sch) |
1151 | { | |
1152 | rtnl_kfree_skbs(skb, skb); | |
1153 | qdisc_qstats_drop(sch); | |
1154 | } | |
1155 | ||
40bd0362 JF |
1156 | static inline int qdisc_drop_cpu(struct sk_buff *skb, struct Qdisc *sch, |
1157 | struct sk_buff **to_free) | |
1158 | { | |
1159 | __qdisc_drop(skb, to_free); | |
1160 | qdisc_qstats_cpu_drop(sch); | |
1161 | ||
1162 | return NET_XMIT_DROP; | |
1163 | } | |
520ac30f ED |
1164 | |
1165 | static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch, | |
1166 | struct sk_buff **to_free) | |
9972b25d | 1167 | { |
520ac30f | 1168 | __qdisc_drop(skb, to_free); |
25331d6c | 1169 | qdisc_qstats_drop(sch); |
9972b25d TG |
1170 | |
1171 | return NET_XMIT_DROP; | |
1172 | } | |
1173 | ||
35d889d1 AK |
1174 | static inline int qdisc_drop_all(struct sk_buff *skb, struct Qdisc *sch, |
1175 | struct sk_buff **to_free) | |
1176 | { | |
1177 | __qdisc_drop_all(skb, to_free); | |
1178 | qdisc_qstats_drop(sch); | |
1179 | ||
1180 | return NET_XMIT_DROP; | |
1181 | } | |
1182 | ||
e9bef55d JDB |
1183 | /* Length to Time (L2T) lookup in a qdisc_rate_table, to determine how |
1184 | long it will take to send a packet given its size. | |
1185 | */ | |
1186 | static inline u32 qdisc_l2t(struct qdisc_rate_table* rtab, unsigned int pktlen) | |
1187 | { | |
e08b0998 JDB |
1188 | int slot = pktlen + rtab->rate.cell_align + rtab->rate.overhead; |
1189 | if (slot < 0) | |
1190 | slot = 0; | |
e9bef55d JDB |
1191 | slot >>= rtab->rate.cell_log; |
1192 | if (slot > 255) | |
a02cec21 | 1193 | return rtab->data[255]*(slot >> 8) + rtab->data[slot & 0xFF]; |
e9bef55d JDB |
1194 | return rtab->data[slot]; |
1195 | } | |
1196 | ||
292f1c7f | 1197 | struct psched_ratecfg { |
130d3d68 | 1198 | u64 rate_bytes_ps; /* bytes per second */ |
01cb71d2 ED |
1199 | u32 mult; |
1200 | u16 overhead; | |
fb80445c | 1201 | u16 mpu; |
8a8e3d84 | 1202 | u8 linklayer; |
01cb71d2 | 1203 | u8 shift; |
292f1c7f JP |
1204 | }; |
1205 | ||
1206 | static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, | |
1207 | unsigned int len) | |
1208 | { | |
8a8e3d84 JDB |
1209 | len += r->overhead; |
1210 | ||
fb80445c KB |
1211 | if (len < r->mpu) |
1212 | len = r->mpu; | |
1213 | ||
8a8e3d84 JDB |
1214 | if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) |
1215 | return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; | |
1216 | ||
1217 | return ((u64)len * r->mult) >> r->shift; | |
292f1c7f JP |
1218 | } |
1219 | ||
5c15257f | 1220 | void psched_ratecfg_precompute(struct psched_ratecfg *r, |
3e1e3aae ED |
1221 | const struct tc_ratespec *conf, |
1222 | u64 rate64); | |
292f1c7f | 1223 | |
01cb71d2 ED |
1224 | static inline void psched_ratecfg_getrate(struct tc_ratespec *res, |
1225 | const struct psched_ratecfg *r) | |
292f1c7f | 1226 | { |
01cb71d2 | 1227 | memset(res, 0, sizeof(*res)); |
3e1e3aae ED |
1228 | |
1229 | /* legacy struct tc_ratespec has a 32bit @rate field | |
1230 | * Qdisc using 64bit rate should add new attributes | |
1231 | * in order to maintain compatibility. | |
1232 | */ | |
1233 | res->rate = min_t(u64, r->rate_bytes_ps, ~0U); | |
1234 | ||
01cb71d2 | 1235 | res->overhead = r->overhead; |
fb80445c | 1236 | res->mpu = r->mpu; |
8a8e3d84 | 1237 | res->linklayer = (r->linklayer & TC_LINKLAYER_MASK); |
292f1c7f JP |
1238 | } |
1239 | ||
2ffe0395 BZ |
1240 | struct psched_pktrate { |
1241 | u64 rate_pkts_ps; /* packets per second */ | |
1242 | u32 mult; | |
1243 | u8 shift; | |
1244 | }; | |
1245 | ||
1246 | static inline u64 psched_pkt2t_ns(const struct psched_pktrate *r, | |
1247 | unsigned int pkt_num) | |
1248 | { | |
1249 | return ((u64)pkt_num * r->mult) >> r->shift; | |
1250 | } | |
1251 | ||
1252 | void psched_ppscfg_precompute(struct psched_pktrate *r, u64 pktrate64); | |
1253 | ||
46209401 JP |
1254 | /* Mini Qdisc serves for specific needs of ingress/clsact Qdisc. |
1255 | * The fast path only needs to access filter list and to update stats | |
1256 | */ | |
1257 | struct mini_Qdisc { | |
1258 | struct tcf_proto *filter_list; | |
7d17c544 | 1259 | struct tcf_block *block; |
50dc9a85 | 1260 | struct gnet_stats_basic_sync __percpu *cpu_bstats; |
46209401 | 1261 | struct gnet_stats_queue __percpu *cpu_qstats; |
26746382 | 1262 | unsigned long rcu_state; |
46209401 JP |
1263 | }; |
1264 | ||
1265 | static inline void mini_qdisc_bstats_cpu_update(struct mini_Qdisc *miniq, | |
1266 | const struct sk_buff *skb) | |
1267 | { | |
50dc9a85 | 1268 | bstats_update(this_cpu_ptr(miniq->cpu_bstats), skb); |
46209401 JP |
1269 | } |
1270 | ||
1271 | static inline void mini_qdisc_qstats_cpu_drop(struct mini_Qdisc *miniq) | |
1272 | { | |
1273 | this_cpu_inc(miniq->cpu_qstats->drops); | |
1274 | } | |
1275 | ||
1276 | struct mini_Qdisc_pair { | |
1277 | struct mini_Qdisc miniq1; | |
1278 | struct mini_Qdisc miniq2; | |
1279 | struct mini_Qdisc __rcu **p_miniq; | |
1280 | }; | |
1281 | ||
1282 | void mini_qdisc_pair_swap(struct mini_Qdisc_pair *miniqp, | |
1283 | struct tcf_proto *tp_head); | |
1284 | void mini_qdisc_pair_init(struct mini_Qdisc_pair *miniqp, struct Qdisc *qdisc, | |
1285 | struct mini_Qdisc __rcu **p_miniq); | |
7d17c544 PB |
1286 | void mini_qdisc_pair_block_init(struct mini_Qdisc_pair *miniqp, |
1287 | struct tcf_block *block); | |
46209401 | 1288 | |
f7116fb4 JK |
1289 | void mq_change_real_num_tx(struct Qdisc *sch, unsigned int new_real_tx); |
1290 | ||
c129412f | 1291 | int sch_frag_xmit_hook(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)); |
cd11b164 | 1292 | |
3a415d59 ED |
1293 | /* Make sure qdisc is no longer in SCHED state. */ |
1294 | static inline void qdisc_synchronize(const struct Qdisc *q) | |
1295 | { | |
1296 | while (test_bit(__QDISC_STATE_SCHED, &q->state)) | |
1297 | msleep(1); | |
1298 | } | |
1299 | ||
1da177e4 | 1300 | #endif |