Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * net/sched/sch_red.c Random Early Detection queue. | |
4 | * | |
1da177e4 LT |
5 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
6 | * | |
7 | * Changes: | |
dba051f3 | 8 | * J Hadi Salim 980914: computation fixes |
1da177e4 | 9 | * Alexey Makarenko <makar@phoenix.kharkov.ua> 990814: qave on idle link was calculated incorrectly. |
dba051f3 | 10 | * J Hadi Salim 980816: ECN support |
1da177e4 LT |
11 | */ |
12 | ||
1da177e4 | 13 | #include <linux/module.h> |
1da177e4 LT |
14 | #include <linux/types.h> |
15 | #include <linux/kernel.h> | |
1da177e4 | 16 | #include <linux/skbuff.h> |
1da177e4 | 17 | #include <net/pkt_sched.h> |
602f3baf | 18 | #include <net/pkt_cls.h> |
1da177e4 | 19 | #include <net/inet_ecn.h> |
6b31b28a | 20 | #include <net/red.h> |
1da177e4 LT |
21 | |
22 | ||
6b31b28a | 23 | /* Parameters, settable by user: |
1da177e4 LT |
24 | ----------------------------- |
25 | ||
26 | limit - bytes (must be > qth_max + burst) | |
27 | ||
28 | Hard limit on queue length, should be chosen >qth_max | |
29 | to allow packet bursts. This parameter does not | |
30 | affect the algorithms behaviour and can be chosen | |
31 | arbitrarily high (well, less than ram size) | |
32 | Really, this limit will never be reached | |
33 | if RED works correctly. | |
1da177e4 LT |
34 | */ |
35 | ||
cc7ec456 | 36 | struct red_sched_data { |
6b31b28a | 37 | u32 limit; /* HARD maximal queue length */ |
14bc175d | 38 | |
6b31b28a | 39 | unsigned char flags; |
14bc175d PM |
40 | /* Non-flags in tc_red_qopt.flags. */ |
41 | unsigned char userbits; | |
42 | ||
8af2a218 | 43 | struct timer_list adapt_timer; |
cdeabbb8 | 44 | struct Qdisc *sch; |
6b31b28a | 45 | struct red_parms parms; |
eeca6688 | 46 | struct red_vars vars; |
6b31b28a | 47 | struct red_stats stats; |
f38c39d6 | 48 | struct Qdisc *qdisc; |
1da177e4 LT |
49 | }; |
50 | ||
0a7fad23 | 51 | static const u32 red_supported_flags = TC_RED_HISTORIC_FLAGS | TC_RED_NODROP; |
14bc175d | 52 | |
6b31b28a | 53 | static inline int red_use_ecn(struct red_sched_data *q) |
1da177e4 | 54 | { |
6b31b28a | 55 | return q->flags & TC_RED_ECN; |
1da177e4 LT |
56 | } |
57 | ||
bdc450a0 TG |
58 | static inline int red_use_harddrop(struct red_sched_data *q) |
59 | { | |
60 | return q->flags & TC_RED_HARDDROP; | |
61 | } | |
62 | ||
0a7fad23 PM |
63 | static int red_use_nodrop(struct red_sched_data *q) |
64 | { | |
65 | return q->flags & TC_RED_NODROP; | |
66 | } | |
67 | ||
520ac30f ED |
68 | static int red_enqueue(struct sk_buff *skb, struct Qdisc *sch, |
69 | struct sk_buff **to_free) | |
1da177e4 LT |
70 | { |
71 | struct red_sched_data *q = qdisc_priv(sch); | |
f38c39d6 PM |
72 | struct Qdisc *child = q->qdisc; |
73 | int ret; | |
1da177e4 | 74 | |
eeca6688 ED |
75 | q->vars.qavg = red_calc_qavg(&q->parms, |
76 | &q->vars, | |
77 | child->qstats.backlog); | |
1da177e4 | 78 | |
eeca6688 ED |
79 | if (red_is_idling(&q->vars)) |
80 | red_end_of_idle_period(&q->vars); | |
1da177e4 | 81 | |
eeca6688 | 82 | switch (red_action(&q->parms, &q->vars, q->vars.qavg)) { |
cc7ec456 ED |
83 | case RED_DONT_MARK: |
84 | break; | |
85 | ||
86 | case RED_PROB_MARK: | |
25331d6c | 87 | qdisc_qstats_overlimit(sch); |
0a7fad23 | 88 | if (!red_use_ecn(q)) { |
cc7ec456 ED |
89 | q->stats.prob_drop++; |
90 | goto congestion_drop; | |
91 | } | |
92 | ||
0a7fad23 PM |
93 | if (INET_ECN_set_ce(skb)) { |
94 | q->stats.prob_mark++; | |
95 | } else if (!red_use_nodrop(q)) { | |
96 | q->stats.prob_drop++; | |
97 | goto congestion_drop; | |
98 | } | |
99 | ||
100 | /* Non-ECT packet in ECN nodrop mode: queue it. */ | |
cc7ec456 ED |
101 | break; |
102 | ||
103 | case RED_HARD_MARK: | |
25331d6c | 104 | qdisc_qstats_overlimit(sch); |
0a7fad23 PM |
105 | if (red_use_harddrop(q) || !red_use_ecn(q)) { |
106 | q->stats.forced_drop++; | |
107 | goto congestion_drop; | |
108 | } | |
109 | ||
110 | if (INET_ECN_set_ce(skb)) { | |
111 | q->stats.forced_mark++; | |
112 | } else if (!red_use_nodrop(q)) { | |
cc7ec456 ED |
113 | q->stats.forced_drop++; |
114 | goto congestion_drop; | |
115 | } | |
116 | ||
0a7fad23 | 117 | /* Non-ECT packet in ECN nodrop mode: queue it. */ |
cc7ec456 | 118 | break; |
1da177e4 LT |
119 | } |
120 | ||
520ac30f | 121 | ret = qdisc_enqueue(skb, child, to_free); |
f38c39d6 | 122 | if (likely(ret == NET_XMIT_SUCCESS)) { |
d7f4f332 | 123 | qdisc_qstats_backlog_inc(sch, skb); |
f38c39d6 | 124 | sch->q.qlen++; |
378a2f09 | 125 | } else if (net_xmit_drop_count(ret)) { |
f38c39d6 | 126 | q->stats.pdrop++; |
25331d6c | 127 | qdisc_qstats_drop(sch); |
f38c39d6 PM |
128 | } |
129 | return ret; | |
6b31b28a TG |
130 | |
131 | congestion_drop: | |
520ac30f | 132 | qdisc_drop(skb, sch, to_free); |
1da177e4 LT |
133 | return NET_XMIT_CN; |
134 | } | |
135 | ||
cc7ec456 | 136 | static struct sk_buff *red_dequeue(struct Qdisc *sch) |
1da177e4 LT |
137 | { |
138 | struct sk_buff *skb; | |
139 | struct red_sched_data *q = qdisc_priv(sch); | |
f38c39d6 | 140 | struct Qdisc *child = q->qdisc; |
1da177e4 | 141 | |
f38c39d6 | 142 | skb = child->dequeue(child); |
9190b3b3 ED |
143 | if (skb) { |
144 | qdisc_bstats_update(sch, skb); | |
d7f4f332 | 145 | qdisc_qstats_backlog_dec(sch, skb); |
f38c39d6 | 146 | sch->q.qlen--; |
9190b3b3 | 147 | } else { |
eeca6688 ED |
148 | if (!red_is_idling(&q->vars)) |
149 | red_start_of_idle_period(&q->vars); | |
9190b3b3 | 150 | } |
9e178ff2 | 151 | return skb; |
1da177e4 LT |
152 | } |
153 | ||
cc7ec456 | 154 | static struct sk_buff *red_peek(struct Qdisc *sch) |
8e3af978 JP |
155 | { |
156 | struct red_sched_data *q = qdisc_priv(sch); | |
157 | struct Qdisc *child = q->qdisc; | |
158 | ||
159 | return child->ops->peek(child); | |
160 | } | |
161 | ||
cc7ec456 | 162 | static void red_reset(struct Qdisc *sch) |
1da177e4 LT |
163 | { |
164 | struct red_sched_data *q = qdisc_priv(sch); | |
165 | ||
f38c39d6 | 166 | qdisc_reset(q->qdisc); |
d7f4f332 | 167 | sch->qstats.backlog = 0; |
f38c39d6 | 168 | sch->q.qlen = 0; |
eeca6688 | 169 | red_restart(&q->vars); |
1da177e4 LT |
170 | } |
171 | ||
602f3baf NF |
172 | static int red_offload(struct Qdisc *sch, bool enable) |
173 | { | |
174 | struct red_sched_data *q = qdisc_priv(sch); | |
175 | struct net_device *dev = qdisc_dev(sch); | |
176 | struct tc_red_qopt_offload opt = { | |
177 | .handle = sch->handle, | |
178 | .parent = sch->parent, | |
179 | }; | |
180 | ||
181 | if (!tc_can_offload(dev) || !dev->netdev_ops->ndo_setup_tc) | |
182 | return -EOPNOTSUPP; | |
183 | ||
184 | if (enable) { | |
185 | opt.command = TC_RED_REPLACE; | |
186 | opt.set.min = q->parms.qth_min >> q->parms.Wlog; | |
187 | opt.set.max = q->parms.qth_max >> q->parms.Wlog; | |
188 | opt.set.probability = q->parms.max_P; | |
c0b7490b | 189 | opt.set.limit = q->limit; |
602f3baf | 190 | opt.set.is_ecn = red_use_ecn(q); |
190852a5 | 191 | opt.set.is_harddrop = red_use_harddrop(q); |
0a7fad23 | 192 | opt.set.is_nodrop = red_use_nodrop(q); |
416ef9b1 | 193 | opt.set.qstats = &sch->qstats; |
602f3baf NF |
194 | } else { |
195 | opt.command = TC_RED_DESTROY; | |
196 | } | |
197 | ||
8234af2d | 198 | return dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED, &opt); |
602f3baf NF |
199 | } |
200 | ||
f38c39d6 PM |
201 | static void red_destroy(struct Qdisc *sch) |
202 | { | |
203 | struct red_sched_data *q = qdisc_priv(sch); | |
8af2a218 ED |
204 | |
205 | del_timer_sync(&q->adapt_timer); | |
602f3baf | 206 | red_offload(sch, false); |
86bd446b | 207 | qdisc_put(q->qdisc); |
f38c39d6 PM |
208 | } |
209 | ||
27a3421e | 210 | static const struct nla_policy red_policy[TCA_RED_MAX + 1] = { |
14bc175d | 211 | [TCA_RED_UNSPEC] = { .strict_start_type = TCA_RED_FLAGS }, |
27a3421e PM |
212 | [TCA_RED_PARMS] = { .len = sizeof(struct tc_red_qopt) }, |
213 | [TCA_RED_STAB] = { .len = RED_STAB_SIZE }, | |
a73ed26b | 214 | [TCA_RED_MAX_P] = { .type = NLA_U32 }, |
14bc175d PM |
215 | [TCA_RED_FLAGS] = { .type = NLA_BITFIELD32, |
216 | .validation_data = &red_supported_flags }, | |
27a3421e PM |
217 | }; |
218 | ||
2030721c AA |
219 | static int red_change(struct Qdisc *sch, struct nlattr *opt, |
220 | struct netlink_ext_ack *extack) | |
1da177e4 | 221 | { |
0c8d13ac | 222 | struct Qdisc *old_child = NULL, *child = NULL; |
1da177e4 | 223 | struct red_sched_data *q = qdisc_priv(sch); |
1e90474c | 224 | struct nlattr *tb[TCA_RED_MAX + 1]; |
14bc175d | 225 | struct nla_bitfield32 flags_bf; |
1da177e4 | 226 | struct tc_red_qopt *ctl; |
14bc175d PM |
227 | unsigned char userbits; |
228 | unsigned char flags; | |
cee63723 | 229 | int err; |
a73ed26b | 230 | u32 max_P; |
1da177e4 | 231 | |
cee63723 | 232 | if (opt == NULL) |
dba051f3 TG |
233 | return -EINVAL; |
234 | ||
8cb08174 JB |
235 | err = nla_parse_nested_deprecated(tb, TCA_RED_MAX, opt, red_policy, |
236 | NULL); | |
cee63723 PM |
237 | if (err < 0) |
238 | return err; | |
239 | ||
1e90474c | 240 | if (tb[TCA_RED_PARMS] == NULL || |
27a3421e | 241 | tb[TCA_RED_STAB] == NULL) |
1da177e4 LT |
242 | return -EINVAL; |
243 | ||
a73ed26b ED |
244 | max_P = tb[TCA_RED_MAX_P] ? nla_get_u32(tb[TCA_RED_MAX_P]) : 0; |
245 | ||
1e90474c | 246 | ctl = nla_data(tb[TCA_RED_PARMS]); |
8afa10cb NF |
247 | if (!red_check_params(ctl->qth_min, ctl->qth_max, ctl->Wlog)) |
248 | return -EINVAL; | |
1da177e4 | 249 | |
14bc175d PM |
250 | err = red_get_flags(ctl->flags, TC_RED_HISTORIC_FLAGS, |
251 | tb[TCA_RED_FLAGS], red_supported_flags, | |
252 | &flags_bf, &userbits, extack); | |
253 | if (err) | |
254 | return err; | |
255 | ||
f38c39d6 | 256 | if (ctl->limit > 0) { |
a38a9882 AA |
257 | child = fifo_create_dflt(sch, &bfifo_qdisc_ops, ctl->limit, |
258 | extack); | |
fb0305ce PM |
259 | if (IS_ERR(child)) |
260 | return PTR_ERR(child); | |
f38c39d6 | 261 | |
44a63b13 | 262 | /* child is fifo, no need to check for noop_qdisc */ |
49b49971 | 263 | qdisc_hash_add(child, true); |
44a63b13 PA |
264 | } |
265 | ||
1da177e4 | 266 | sch_tree_lock(sch); |
14bc175d PM |
267 | |
268 | flags = (q->flags & ~flags_bf.selector) | flags_bf.value; | |
269 | err = red_validate_flags(flags, extack); | |
270 | if (err) | |
271 | goto unlock_out; | |
272 | ||
273 | q->flags = flags; | |
274 | q->userbits = userbits; | |
1da177e4 | 275 | q->limit = ctl->limit; |
5e50da01 | 276 | if (child) { |
e5f0e8f8 | 277 | qdisc_tree_flush_backlog(q->qdisc); |
0c8d13ac | 278 | old_child = q->qdisc; |
b94c8afc | 279 | q->qdisc = child; |
5e50da01 | 280 | } |
1da177e4 | 281 | |
eeca6688 ED |
282 | red_set_parms(&q->parms, |
283 | ctl->qth_min, ctl->qth_max, ctl->Wlog, | |
a73ed26b ED |
284 | ctl->Plog, ctl->Scell_log, |
285 | nla_data(tb[TCA_RED_STAB]), | |
286 | max_P); | |
eeca6688 | 287 | red_set_vars(&q->vars); |
6b31b28a | 288 | |
8af2a218 ED |
289 | del_timer(&q->adapt_timer); |
290 | if (ctl->flags & TC_RED_ADAPTATIVE) | |
291 | mod_timer(&q->adapt_timer, jiffies + HZ/2); | |
292 | ||
1ee5fa1e | 293 | if (!q->qdisc->q.qlen) |
eeca6688 | 294 | red_start_of_idle_period(&q->vars); |
dba051f3 | 295 | |
1da177e4 | 296 | sch_tree_unlock(sch); |
0c8d13ac | 297 | |
602f3baf | 298 | red_offload(sch, true); |
0c8d13ac JK |
299 | |
300 | if (old_child) | |
301 | qdisc_put(old_child); | |
1da177e4 | 302 | return 0; |
14bc175d PM |
303 | |
304 | unlock_out: | |
305 | sch_tree_unlock(sch); | |
306 | if (child) | |
307 | qdisc_put(child); | |
308 | return err; | |
1da177e4 LT |
309 | } |
310 | ||
cdeabbb8 | 311 | static inline void red_adaptative_timer(struct timer_list *t) |
8af2a218 | 312 | { |
cdeabbb8 KC |
313 | struct red_sched_data *q = from_timer(q, t, adapt_timer); |
314 | struct Qdisc *sch = q->sch; | |
8af2a218 ED |
315 | spinlock_t *root_lock = qdisc_lock(qdisc_root_sleeping(sch)); |
316 | ||
317 | spin_lock(root_lock); | |
eeca6688 | 318 | red_adaptative_algo(&q->parms, &q->vars); |
8af2a218 ED |
319 | mod_timer(&q->adapt_timer, jiffies + HZ/2); |
320 | spin_unlock(root_lock); | |
321 | } | |
322 | ||
e63d7dfd AA |
323 | static int red_init(struct Qdisc *sch, struct nlattr *opt, |
324 | struct netlink_ext_ack *extack) | |
1da177e4 | 325 | { |
f38c39d6 PM |
326 | struct red_sched_data *q = qdisc_priv(sch); |
327 | ||
328 | q->qdisc = &noop_qdisc; | |
cdeabbb8 KC |
329 | q->sch = sch; |
330 | timer_setup(&q->adapt_timer, red_adaptative_timer, 0); | |
2030721c | 331 | return red_change(sch, opt, extack); |
1da177e4 LT |
332 | } |
333 | ||
dad54c0f | 334 | static int red_dump_offload_stats(struct Qdisc *sch) |
602f3baf | 335 | { |
602f3baf | 336 | struct tc_red_qopt_offload hw_stats = { |
ee9d3429 | 337 | .command = TC_RED_STATS, |
602f3baf NF |
338 | .handle = sch->handle, |
339 | .parent = sch->parent, | |
ee9d3429 AM |
340 | { |
341 | .stats.bstats = &sch->bstats, | |
342 | .stats.qstats = &sch->qstats, | |
343 | }, | |
602f3baf | 344 | }; |
8234af2d | 345 | |
b592843c | 346 | return qdisc_offload_dump_helper(sch, TC_SETUP_QDISC_RED, &hw_stats); |
602f3baf NF |
347 | } |
348 | ||
1da177e4 LT |
349 | static int red_dump(struct Qdisc *sch, struct sk_buff *skb) |
350 | { | |
351 | struct red_sched_data *q = qdisc_priv(sch); | |
14bc175d PM |
352 | struct nla_bitfield32 flags_bf = { |
353 | .selector = red_supported_flags, | |
354 | .value = q->flags, | |
355 | }; | |
1e90474c | 356 | struct nlattr *opts = NULL; |
6b31b28a TG |
357 | struct tc_red_qopt opt = { |
358 | .limit = q->limit, | |
14bc175d PM |
359 | .flags = (q->flags & TC_RED_HISTORIC_FLAGS) | |
360 | q->userbits, | |
6b31b28a TG |
361 | .qth_min = q->parms.qth_min >> q->parms.Wlog, |
362 | .qth_max = q->parms.qth_max >> q->parms.Wlog, | |
363 | .Wlog = q->parms.Wlog, | |
364 | .Plog = q->parms.Plog, | |
365 | .Scell_log = q->parms.Scell_log, | |
366 | }; | |
602f3baf | 367 | int err; |
1da177e4 | 368 | |
dad54c0f | 369 | err = red_dump_offload_stats(sch); |
602f3baf NF |
370 | if (err) |
371 | goto nla_put_failure; | |
372 | ||
ae0be8de | 373 | opts = nla_nest_start_noflag(skb, TCA_OPTIONS); |
1e90474c PM |
374 | if (opts == NULL) |
375 | goto nla_put_failure; | |
1b34ec43 | 376 | if (nla_put(skb, TCA_RED_PARMS, sizeof(opt), &opt) || |
14bc175d PM |
377 | nla_put_u32(skb, TCA_RED_MAX_P, q->parms.max_P) || |
378 | nla_put(skb, TCA_RED_FLAGS, sizeof(flags_bf), &flags_bf)) | |
1b34ec43 | 379 | goto nla_put_failure; |
1e90474c | 380 | return nla_nest_end(skb, opts); |
1da177e4 | 381 | |
1e90474c | 382 | nla_put_failure: |
bc3ed28c TG |
383 | nla_nest_cancel(skb, opts); |
384 | return -EMSGSIZE; | |
1da177e4 LT |
385 | } |
386 | ||
387 | static int red_dump_stats(struct Qdisc *sch, struct gnet_dump *d) | |
388 | { | |
389 | struct red_sched_data *q = qdisc_priv(sch); | |
602f3baf | 390 | struct net_device *dev = qdisc_dev(sch); |
f8253df5 | 391 | struct tc_red_xstats st = {0}; |
6b31b28a | 392 | |
428a68af | 393 | if (sch->flags & TCQ_F_OFFLOADED) { |
602f3baf | 394 | struct tc_red_qopt_offload hw_stats_request = { |
ee9d3429 | 395 | .command = TC_RED_XSTATS, |
602f3baf NF |
396 | .handle = sch->handle, |
397 | .parent = sch->parent, | |
ee9d3429 | 398 | { |
f8253df5 | 399 | .xstats = &q->stats, |
ee9d3429 | 400 | }, |
602f3baf | 401 | }; |
f8253df5 NF |
402 | dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED, |
403 | &hw_stats_request); | |
602f3baf | 404 | } |
f8253df5 NF |
405 | st.early = q->stats.prob_drop + q->stats.forced_drop; |
406 | st.pdrop = q->stats.pdrop; | |
407 | st.other = q->stats.other; | |
408 | st.marked = q->stats.prob_mark + q->stats.forced_mark; | |
602f3baf | 409 | |
6b31b28a | 410 | return gnet_stats_copy_app(d, &st, sizeof(st)); |
1da177e4 LT |
411 | } |
412 | ||
f38c39d6 PM |
413 | static int red_dump_class(struct Qdisc *sch, unsigned long cl, |
414 | struct sk_buff *skb, struct tcmsg *tcm) | |
415 | { | |
416 | struct red_sched_data *q = qdisc_priv(sch); | |
417 | ||
f38c39d6 PM |
418 | tcm->tcm_handle |= TC_H_MIN(1); |
419 | tcm->tcm_info = q->qdisc->handle; | |
420 | return 0; | |
421 | } | |
422 | ||
bf2a752b JK |
423 | static void red_graft_offload(struct Qdisc *sch, |
424 | struct Qdisc *new, struct Qdisc *old, | |
425 | struct netlink_ext_ack *extack) | |
426 | { | |
427 | struct tc_red_qopt_offload graft_offload = { | |
428 | .handle = sch->handle, | |
429 | .parent = sch->parent, | |
430 | .child_handle = new->handle, | |
431 | .command = TC_RED_GRAFT, | |
432 | }; | |
433 | ||
434 | qdisc_offload_graft_helper(qdisc_dev(sch), sch, new, old, | |
435 | TC_SETUP_QDISC_RED, &graft_offload, extack); | |
436 | } | |
437 | ||
f38c39d6 | 438 | static int red_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, |
653d6fd6 | 439 | struct Qdisc **old, struct netlink_ext_ack *extack) |
f38c39d6 PM |
440 | { |
441 | struct red_sched_data *q = qdisc_priv(sch); | |
442 | ||
443 | if (new == NULL) | |
444 | new = &noop_qdisc; | |
445 | ||
86a7996c | 446 | *old = qdisc_replace(sch, new, &q->qdisc); |
bf2a752b JK |
447 | |
448 | red_graft_offload(sch, new, *old, extack); | |
f38c39d6 PM |
449 | return 0; |
450 | } | |
451 | ||
452 | static struct Qdisc *red_leaf(struct Qdisc *sch, unsigned long arg) | |
453 | { | |
454 | struct red_sched_data *q = qdisc_priv(sch); | |
455 | return q->qdisc; | |
456 | } | |
457 | ||
143976ce | 458 | static unsigned long red_find(struct Qdisc *sch, u32 classid) |
f38c39d6 PM |
459 | { |
460 | return 1; | |
461 | } | |
462 | ||
f38c39d6 PM |
463 | static void red_walk(struct Qdisc *sch, struct qdisc_walker *walker) |
464 | { | |
465 | if (!walker->stop) { | |
466 | if (walker->count >= walker->skip) | |
467 | if (walker->fn(sch, 1, walker) < 0) { | |
468 | walker->stop = 1; | |
469 | return; | |
470 | } | |
471 | walker->count++; | |
472 | } | |
473 | } | |
474 | ||
20fea08b | 475 | static const struct Qdisc_class_ops red_class_ops = { |
f38c39d6 PM |
476 | .graft = red_graft, |
477 | .leaf = red_leaf, | |
143976ce | 478 | .find = red_find, |
f38c39d6 | 479 | .walk = red_walk, |
f38c39d6 PM |
480 | .dump = red_dump_class, |
481 | }; | |
482 | ||
20fea08b | 483 | static struct Qdisc_ops red_qdisc_ops __read_mostly = { |
1da177e4 LT |
484 | .id = "red", |
485 | .priv_size = sizeof(struct red_sched_data), | |
f38c39d6 | 486 | .cl_ops = &red_class_ops, |
1da177e4 LT |
487 | .enqueue = red_enqueue, |
488 | .dequeue = red_dequeue, | |
8e3af978 | 489 | .peek = red_peek, |
1da177e4 LT |
490 | .init = red_init, |
491 | .reset = red_reset, | |
f38c39d6 | 492 | .destroy = red_destroy, |
1da177e4 LT |
493 | .change = red_change, |
494 | .dump = red_dump, | |
495 | .dump_stats = red_dump_stats, | |
496 | .owner = THIS_MODULE, | |
497 | }; | |
498 | ||
499 | static int __init red_module_init(void) | |
500 | { | |
501 | return register_qdisc(&red_qdisc_ops); | |
502 | } | |
dba051f3 TG |
503 | |
504 | static void __exit red_module_exit(void) | |
1da177e4 LT |
505 | { |
506 | unregister_qdisc(&red_qdisc_ops); | |
507 | } | |
dba051f3 | 508 | |
1da177e4 LT |
509 | module_init(red_module_init) |
510 | module_exit(red_module_exit) | |
dba051f3 | 511 | |
1da177e4 | 512 | MODULE_LICENSE("GPL"); |