Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net/sched/sch_gred.c Generic Random Early Detection queue. | |
3 | * | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version | |
8 | * 2 of the License, or (at your option) any later version. | |
9 | * | |
10 | * Authors: J Hadi Salim (hadi@cyberus.ca) 1998-2002 | |
11 | * | |
12 | * 991129: - Bug fix with grio mode | |
13 | * - a better sing. AvgQ mode with Grio(WRED) | |
14 | * - A finer grained VQ dequeue based on sugestion | |
15 | * from Ren Liu | |
16 | * - More error checks | |
17 | * | |
1e4dfaf9 | 18 | * For all the glorious comments look at include/net/red.h |
1da177e4 LT |
19 | */ |
20 | ||
1da177e4 | 21 | #include <linux/module.h> |
1da177e4 LT |
22 | #include <linux/types.h> |
23 | #include <linux/kernel.h> | |
1da177e4 | 24 | #include <linux/skbuff.h> |
1da177e4 | 25 | #include <net/pkt_sched.h> |
22b33429 | 26 | #include <net/red.h> |
1da177e4 | 27 | |
f62d6b93 | 28 | #define GRED_DEF_PRIO (MAX_DPs / 2) |
716a1b40 | 29 | #define GRED_VQ_MASK (MAX_DPs - 1) |
f62d6b93 | 30 | |
1da177e4 LT |
31 | struct gred_sched_data; |
32 | struct gred_sched; | |
33 | ||
34 | struct gred_sched_data | |
35 | { | |
1da177e4 | 36 | u32 limit; /* HARD maximal queue length */ |
1da177e4 | 37 | u32 DP; /* the drop pramaters */ |
1da177e4 LT |
38 | u32 bytesin; /* bytes seen on virtualQ so far*/ |
39 | u32 packetsin; /* packets seen on virtualQ so far*/ | |
40 | u32 backlog; /* bytes on the virtualQ */ | |
1e4dfaf9 | 41 | u8 prio; /* the prio of this vq */ |
1da177e4 | 42 | |
22b33429 TG |
43 | struct red_parms parms; |
44 | struct red_stats stats; | |
1da177e4 LT |
45 | }; |
46 | ||
dea3f628 TG |
47 | enum { |
48 | GRED_WRED_MODE = 1, | |
d6fd4e96 | 49 | GRED_RIO_MODE, |
dea3f628 TG |
50 | }; |
51 | ||
1da177e4 LT |
52 | struct gred_sched |
53 | { | |
54 | struct gred_sched_data *tab[MAX_DPs]; | |
dea3f628 | 55 | unsigned long flags; |
b38c7eef | 56 | u32 red_flags; |
1e4dfaf9 TG |
57 | u32 DPs; |
58 | u32 def; | |
7051703b | 59 | struct red_parms wred_set; |
1da177e4 LT |
60 | }; |
61 | ||
dea3f628 TG |
62 | static inline int gred_wred_mode(struct gred_sched *table) |
63 | { | |
64 | return test_bit(GRED_WRED_MODE, &table->flags); | |
65 | } | |
66 | ||
67 | static inline void gred_enable_wred_mode(struct gred_sched *table) | |
68 | { | |
69 | __set_bit(GRED_WRED_MODE, &table->flags); | |
70 | } | |
71 | ||
72 | static inline void gred_disable_wred_mode(struct gred_sched *table) | |
73 | { | |
74 | __clear_bit(GRED_WRED_MODE, &table->flags); | |
75 | } | |
76 | ||
d6fd4e96 TG |
77 | static inline int gred_rio_mode(struct gred_sched *table) |
78 | { | |
79 | return test_bit(GRED_RIO_MODE, &table->flags); | |
80 | } | |
81 | ||
82 | static inline void gred_enable_rio_mode(struct gred_sched *table) | |
83 | { | |
84 | __set_bit(GRED_RIO_MODE, &table->flags); | |
85 | } | |
86 | ||
87 | static inline void gred_disable_rio_mode(struct gred_sched *table) | |
88 | { | |
89 | __clear_bit(GRED_RIO_MODE, &table->flags); | |
90 | } | |
91 | ||
dea3f628 TG |
92 | static inline int gred_wred_mode_check(struct Qdisc *sch) |
93 | { | |
94 | struct gred_sched *table = qdisc_priv(sch); | |
95 | int i; | |
96 | ||
97 | /* Really ugly O(n^2) but shouldn't be necessary too frequent. */ | |
98 | for (i = 0; i < table->DPs; i++) { | |
99 | struct gred_sched_data *q = table->tab[i]; | |
100 | int n; | |
101 | ||
102 | if (q == NULL) | |
103 | continue; | |
104 | ||
105 | for (n = 0; n < table->DPs; n++) | |
106 | if (table->tab[n] && table->tab[n] != q && | |
107 | table->tab[n]->prio == q->prio) | |
108 | return 1; | |
109 | } | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
22b33429 TG |
114 | static inline unsigned int gred_backlog(struct gred_sched *table, |
115 | struct gred_sched_data *q, | |
116 | struct Qdisc *sch) | |
117 | { | |
118 | if (gred_wred_mode(table)) | |
119 | return sch->qstats.backlog; | |
120 | else | |
121 | return q->backlog; | |
122 | } | |
123 | ||
716a1b40 TG |
124 | static inline u16 tc_index_to_dp(struct sk_buff *skb) |
125 | { | |
126 | return skb->tc_index & GRED_VQ_MASK; | |
127 | } | |
128 | ||
7051703b TG |
129 | static inline void gred_load_wred_set(struct gred_sched *table, |
130 | struct gred_sched_data *q) | |
131 | { | |
132 | q->parms.qavg = table->wred_set.qavg; | |
133 | q->parms.qidlestart = table->wred_set.qidlestart; | |
134 | } | |
135 | ||
136 | static inline void gred_store_wred_set(struct gred_sched *table, | |
137 | struct gred_sched_data *q) | |
138 | { | |
139 | table->wred_set.qavg = q->parms.qavg; | |
140 | } | |
141 | ||
b38c7eef TG |
142 | static inline int gred_use_ecn(struct gred_sched *t) |
143 | { | |
144 | return t->red_flags & TC_RED_ECN; | |
145 | } | |
146 | ||
bdc450a0 TG |
147 | static inline int gred_use_harddrop(struct gred_sched *t) |
148 | { | |
149 | return t->red_flags & TC_RED_HARDDROP; | |
150 | } | |
151 | ||
1e4dfaf9 | 152 | static int gred_enqueue(struct sk_buff *skb, struct Qdisc* sch) |
1da177e4 | 153 | { |
1da177e4 LT |
154 | struct gred_sched_data *q=NULL; |
155 | struct gred_sched *t= qdisc_priv(sch); | |
22b33429 | 156 | unsigned long qavg = 0; |
4a591834 | 157 | u16 dp = tc_index_to_dp(skb); |
1da177e4 | 158 | |
716a1b40 | 159 | if (dp >= t->DPs || (q = t->tab[dp]) == NULL) { |
18e3fb84 TG |
160 | dp = t->def; |
161 | ||
162 | if ((q = t->tab[dp]) == NULL) { | |
163 | /* Pass through packets not assigned to a DP | |
164 | * if no default DP has been configured. This | |
165 | * allows for DP flows to be left untouched. | |
166 | */ | |
5ce2d488 | 167 | if (skb_queue_len(&sch->q) < qdisc_dev(sch)->tx_queue_len) |
18e3fb84 TG |
168 | return qdisc_enqueue_tail(skb, sch); |
169 | else | |
170 | goto drop; | |
1da177e4 | 171 | } |
18e3fb84 | 172 | |
1da177e4 LT |
173 | /* fix tc_index? --could be controvesial but needed for |
174 | requeueing */ | |
18e3fb84 | 175 | skb->tc_index = (skb->tc_index & ~GRED_VQ_MASK) | dp; |
1da177e4 LT |
176 | } |
177 | ||
1e4dfaf9 | 178 | /* sum up all the qaves of prios <= to ours to get the new qave */ |
d6fd4e96 | 179 | if (!gred_wred_mode(t) && gred_rio_mode(t)) { |
1e4dfaf9 TG |
180 | int i; |
181 | ||
182 | for (i = 0; i < t->DPs; i++) { | |
183 | if (t->tab[i] && t->tab[i]->prio < q->prio && | |
22b33429 TG |
184 | !red_is_idling(&t->tab[i]->parms)) |
185 | qavg +=t->tab[i]->parms.qavg; | |
1da177e4 | 186 | } |
1e4dfaf9 | 187 | |
1da177e4 LT |
188 | } |
189 | ||
190 | q->packetsin++; | |
0abf77e5 | 191 | q->bytesin += qdisc_pkt_len(skb); |
1da177e4 | 192 | |
1e4dfaf9 | 193 | if (gred_wred_mode(t)) |
7051703b | 194 | gred_load_wred_set(t, q); |
1da177e4 | 195 | |
22b33429 | 196 | q->parms.qavg = red_calc_qavg(&q->parms, gred_backlog(t, q, sch)); |
1da177e4 | 197 | |
22b33429 TG |
198 | if (red_is_idling(&q->parms)) |
199 | red_end_of_idle_period(&q->parms); | |
1da177e4 | 200 | |
dea3f628 | 201 | if (gred_wred_mode(t)) |
7051703b | 202 | gred_store_wred_set(t, q); |
1da177e4 | 203 | |
22b33429 TG |
204 | switch (red_action(&q->parms, q->parms.qavg + qavg)) { |
205 | case RED_DONT_MARK: | |
206 | break; | |
1da177e4 | 207 | |
22b33429 TG |
208 | case RED_PROB_MARK: |
209 | sch->qstats.overlimits++; | |
b38c7eef TG |
210 | if (!gred_use_ecn(t) || !INET_ECN_set_ce(skb)) { |
211 | q->stats.prob_drop++; | |
212 | goto congestion_drop; | |
213 | } | |
214 | ||
215 | q->stats.prob_mark++; | |
216 | break; | |
22b33429 TG |
217 | |
218 | case RED_HARD_MARK: | |
219 | sch->qstats.overlimits++; | |
bdc450a0 TG |
220 | if (gred_use_harddrop(t) || !gred_use_ecn(t) || |
221 | !INET_ECN_set_ce(skb)) { | |
b38c7eef TG |
222 | q->stats.forced_drop++; |
223 | goto congestion_drop; | |
224 | } | |
225 | q->stats.forced_mark++; | |
226 | break; | |
1da177e4 | 227 | } |
22b33429 | 228 | |
0abf77e5 JK |
229 | if (q->backlog + qdisc_pkt_len(skb) <= q->limit) { |
230 | q->backlog += qdisc_pkt_len(skb); | |
edf7a7b1 | 231 | return qdisc_enqueue_tail(skb, sch); |
1da177e4 | 232 | } |
22b33429 TG |
233 | |
234 | q->stats.pdrop++; | |
235 | drop: | |
edf7a7b1 | 236 | return qdisc_drop(skb, sch); |
c3b553cd TG |
237 | |
238 | congestion_drop: | |
edf7a7b1 | 239 | qdisc_drop(skb, sch); |
c3b553cd | 240 | return NET_XMIT_CN; |
1da177e4 LT |
241 | } |
242 | ||
1e4dfaf9 | 243 | static struct sk_buff *gred_dequeue(struct Qdisc* sch) |
1da177e4 LT |
244 | { |
245 | struct sk_buff *skb; | |
1e4dfaf9 | 246 | struct gred_sched *t = qdisc_priv(sch); |
1da177e4 | 247 | |
edf7a7b1 TG |
248 | skb = qdisc_dequeue_head(sch); |
249 | ||
1da177e4 | 250 | if (skb) { |
1e4dfaf9 | 251 | struct gred_sched_data *q; |
18e3fb84 TG |
252 | u16 dp = tc_index_to_dp(skb); |
253 | ||
254 | if (dp >= t->DPs || (q = t->tab[dp]) == NULL) { | |
255 | if (net_ratelimit()) | |
256 | printk(KERN_WARNING "GRED: Unable to relocate " | |
257 | "VQ 0x%x after dequeue, screwing up " | |
258 | "backlog.\n", tc_index_to_dp(skb)); | |
259 | } else { | |
0abf77e5 | 260 | q->backlog -= qdisc_pkt_len(skb); |
18e3fb84 | 261 | |
dea3f628 | 262 | if (!q->backlog && !gred_wred_mode(t)) |
22b33429 | 263 | red_start_of_idle_period(&q->parms); |
1da177e4 | 264 | } |
18e3fb84 | 265 | |
1da177e4 LT |
266 | return skb; |
267 | } | |
268 | ||
d8f64e19 | 269 | if (gred_wred_mode(t) && !red_is_idling(&t->wred_set)) |
7051703b | 270 | red_start_of_idle_period(&t->wred_set); |
1da177e4 LT |
271 | |
272 | return NULL; | |
273 | } | |
274 | ||
275 | static unsigned int gred_drop(struct Qdisc* sch) | |
276 | { | |
277 | struct sk_buff *skb; | |
1e4dfaf9 | 278 | struct gred_sched *t = qdisc_priv(sch); |
1da177e4 | 279 | |
edf7a7b1 | 280 | skb = qdisc_dequeue_tail(sch); |
1da177e4 | 281 | if (skb) { |
0abf77e5 | 282 | unsigned int len = qdisc_pkt_len(skb); |
1e4dfaf9 | 283 | struct gred_sched_data *q; |
18e3fb84 TG |
284 | u16 dp = tc_index_to_dp(skb); |
285 | ||
286 | if (dp >= t->DPs || (q = t->tab[dp]) == NULL) { | |
287 | if (net_ratelimit()) | |
288 | printk(KERN_WARNING "GRED: Unable to relocate " | |
289 | "VQ 0x%x while dropping, screwing up " | |
290 | "backlog.\n", tc_index_to_dp(skb)); | |
291 | } else { | |
1da177e4 | 292 | q->backlog -= len; |
22b33429 | 293 | q->stats.other++; |
18e3fb84 | 294 | |
dea3f628 | 295 | if (!q->backlog && !gred_wred_mode(t)) |
22b33429 | 296 | red_start_of_idle_period(&q->parms); |
1da177e4 LT |
297 | } |
298 | ||
edf7a7b1 | 299 | qdisc_drop(skb, sch); |
1da177e4 LT |
300 | return len; |
301 | } | |
302 | ||
d8f64e19 | 303 | if (gred_wred_mode(t) && !red_is_idling(&t->wred_set)) |
7051703b | 304 | red_start_of_idle_period(&t->wred_set); |
1da177e4 | 305 | |
1da177e4 LT |
306 | return 0; |
307 | ||
308 | } | |
309 | ||
310 | static void gred_reset(struct Qdisc* sch) | |
311 | { | |
312 | int i; | |
1e4dfaf9 | 313 | struct gred_sched *t = qdisc_priv(sch); |
1da177e4 | 314 | |
edf7a7b1 | 315 | qdisc_reset_queue(sch); |
1da177e4 | 316 | |
10297b99 | 317 | for (i = 0; i < t->DPs; i++) { |
1e4dfaf9 TG |
318 | struct gred_sched_data *q = t->tab[i]; |
319 | ||
320 | if (!q) | |
321 | continue; | |
322 | ||
22b33429 | 323 | red_restart(&q->parms); |
1da177e4 | 324 | q->backlog = 0; |
1da177e4 LT |
325 | } |
326 | } | |
327 | ||
6639607e TG |
328 | static inline void gred_destroy_vq(struct gred_sched_data *q) |
329 | { | |
330 | kfree(q); | |
331 | } | |
332 | ||
1e90474c | 333 | static inline int gred_change_table_def(struct Qdisc *sch, struct nlattr *dps) |
1da177e4 LT |
334 | { |
335 | struct gred_sched *table = qdisc_priv(sch); | |
1da177e4 | 336 | struct tc_gred_sopt *sopt; |
6639607e | 337 | int i; |
1da177e4 | 338 | |
27a3421e | 339 | if (dps == NULL) |
1da177e4 LT |
340 | return -EINVAL; |
341 | ||
1e90474c | 342 | sopt = nla_data(dps); |
1da177e4 | 343 | |
6639607e TG |
344 | if (sopt->DPs > MAX_DPs || sopt->DPs == 0 || sopt->def_DP >= sopt->DPs) |
345 | return -EINVAL; | |
1da177e4 | 346 | |
6639607e TG |
347 | sch_tree_lock(sch); |
348 | table->DPs = sopt->DPs; | |
349 | table->def = sopt->def_DP; | |
b38c7eef | 350 | table->red_flags = sopt->flags; |
dea3f628 | 351 | |
6639607e TG |
352 | /* |
353 | * Every entry point to GRED is synchronized with the above code | |
354 | * and the DP is checked against DPs, i.e. shadowed VQs can no | |
355 | * longer be found so we can unlock right here. | |
356 | */ | |
357 | sch_tree_unlock(sch); | |
dea3f628 | 358 | |
6639607e TG |
359 | if (sopt->grio) { |
360 | gred_enable_rio_mode(table); | |
361 | gred_disable_wred_mode(table); | |
362 | if (gred_wred_mode_check(sch)) | |
363 | gred_enable_wred_mode(table); | |
364 | } else { | |
365 | gred_disable_rio_mode(table); | |
366 | gred_disable_wred_mode(table); | |
367 | } | |
368 | ||
369 | for (i = table->DPs; i < MAX_DPs; i++) { | |
370 | if (table->tab[i]) { | |
371 | printk(KERN_WARNING "GRED: Warning: Destroying " | |
372 | "shadowed VQ 0x%x\n", i); | |
373 | gred_destroy_vq(table->tab[i]); | |
374 | table->tab[i] = NULL; | |
10297b99 | 375 | } |
6639607e | 376 | } |
1da177e4 | 377 | |
6639607e TG |
378 | return 0; |
379 | } | |
380 | ||
f62d6b93 TG |
381 | static inline int gred_change_vq(struct Qdisc *sch, int dp, |
382 | struct tc_gred_qopt *ctl, int prio, u8 *stab) | |
6639607e TG |
383 | { |
384 | struct gred_sched *table = qdisc_priv(sch); | |
385 | struct gred_sched_data *q; | |
f62d6b93 TG |
386 | |
387 | if (table->tab[dp] == NULL) { | |
0da974f4 | 388 | table->tab[dp] = kzalloc(sizeof(*q), GFP_KERNEL); |
f62d6b93 TG |
389 | if (table->tab[dp] == NULL) |
390 | return -ENOMEM; | |
f62d6b93 TG |
391 | } |
392 | ||
393 | q = table->tab[dp]; | |
394 | q->DP = dp; | |
395 | q->prio = prio; | |
f62d6b93 | 396 | q->limit = ctl->limit; |
22b33429 TG |
397 | |
398 | if (q->backlog == 0) | |
399 | red_end_of_idle_period(&q->parms); | |
400 | ||
401 | red_set_parms(&q->parms, | |
402 | ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Plog, | |
403 | ctl->Scell_log, stab); | |
404 | ||
f62d6b93 TG |
405 | return 0; |
406 | } | |
407 | ||
27a3421e PM |
408 | static const struct nla_policy gred_policy[TCA_GRED_MAX + 1] = { |
409 | [TCA_GRED_PARMS] = { .len = sizeof(struct tc_gred_qopt) }, | |
410 | [TCA_GRED_STAB] = { .len = 256 }, | |
411 | [TCA_GRED_DPS] = { .len = sizeof(struct tc_gred_sopt) }, | |
412 | }; | |
413 | ||
1e90474c | 414 | static int gred_change(struct Qdisc *sch, struct nlattr *opt) |
f62d6b93 TG |
415 | { |
416 | struct gred_sched *table = qdisc_priv(sch); | |
6639607e | 417 | struct tc_gred_qopt *ctl; |
1e90474c | 418 | struct nlattr *tb[TCA_GRED_MAX + 1]; |
cee63723 | 419 | int err, prio = GRED_DEF_PRIO; |
f62d6b93 | 420 | u8 *stab; |
6639607e | 421 | |
cee63723 | 422 | if (opt == NULL) |
6639607e TG |
423 | return -EINVAL; |
424 | ||
27a3421e | 425 | err = nla_parse_nested(tb, TCA_GRED_MAX, opt, gred_policy); |
cee63723 PM |
426 | if (err < 0) |
427 | return err; | |
428 | ||
1e90474c | 429 | if (tb[TCA_GRED_PARMS] == NULL && tb[TCA_GRED_STAB] == NULL) |
f62d6b93 | 430 | return gred_change_table_def(sch, opt); |
1da177e4 | 431 | |
1e90474c | 432 | if (tb[TCA_GRED_PARMS] == NULL || |
27a3421e | 433 | tb[TCA_GRED_STAB] == NULL) |
f62d6b93 | 434 | return -EINVAL; |
1da177e4 | 435 | |
cee63723 | 436 | err = -EINVAL; |
1e90474c PM |
437 | ctl = nla_data(tb[TCA_GRED_PARMS]); |
438 | stab = nla_data(tb[TCA_GRED_STAB]); | |
a8aaa995 TG |
439 | |
440 | if (ctl->DP >= table->DPs) | |
f62d6b93 | 441 | goto errout; |
1da177e4 | 442 | |
d6fd4e96 | 443 | if (gred_rio_mode(table)) { |
f62d6b93 TG |
444 | if (ctl->prio == 0) { |
445 | int def_prio = GRED_DEF_PRIO; | |
446 | ||
447 | if (table->tab[table->def]) | |
448 | def_prio = table->tab[table->def]->prio; | |
449 | ||
450 | printk(KERN_DEBUG "GRED: DP %u does not have a prio " | |
451 | "setting default to %d\n", ctl->DP, def_prio); | |
452 | ||
453 | prio = def_prio; | |
454 | } else | |
455 | prio = ctl->prio; | |
1da177e4 LT |
456 | } |
457 | ||
f62d6b93 | 458 | sch_tree_lock(sch); |
1da177e4 | 459 | |
f62d6b93 TG |
460 | err = gred_change_vq(sch, ctl->DP, ctl, prio, stab); |
461 | if (err < 0) | |
462 | goto errout_locked; | |
1da177e4 | 463 | |
d6fd4e96 | 464 | if (gred_rio_mode(table)) { |
dea3f628 TG |
465 | gred_disable_wred_mode(table); |
466 | if (gred_wred_mode_check(sch)) | |
467 | gred_enable_wred_mode(table); | |
1da177e4 LT |
468 | } |
469 | ||
f62d6b93 | 470 | err = 0; |
1da177e4 | 471 | |
f62d6b93 TG |
472 | errout_locked: |
473 | sch_tree_unlock(sch); | |
474 | errout: | |
475 | return err; | |
1da177e4 LT |
476 | } |
477 | ||
1e90474c | 478 | static int gred_init(struct Qdisc *sch, struct nlattr *opt) |
1da177e4 | 479 | { |
1e90474c | 480 | struct nlattr *tb[TCA_GRED_MAX + 1]; |
cee63723 | 481 | int err; |
1da177e4 | 482 | |
cee63723 | 483 | if (opt == NULL) |
1da177e4 LT |
484 | return -EINVAL; |
485 | ||
27a3421e | 486 | err = nla_parse_nested(tb, TCA_GRED_MAX, opt, gred_policy); |
cee63723 PM |
487 | if (err < 0) |
488 | return err; | |
489 | ||
1e90474c | 490 | if (tb[TCA_GRED_PARMS] || tb[TCA_GRED_STAB]) |
6639607e | 491 | return -EINVAL; |
1da177e4 | 492 | |
1e90474c | 493 | return gred_change_table_def(sch, tb[TCA_GRED_DPS]); |
1da177e4 LT |
494 | } |
495 | ||
496 | static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) | |
497 | { | |
1da177e4 | 498 | struct gred_sched *table = qdisc_priv(sch); |
1e90474c | 499 | struct nlattr *parms, *opts = NULL; |
1da177e4 | 500 | int i; |
e0636822 TG |
501 | struct tc_gred_sopt sopt = { |
502 | .DPs = table->DPs, | |
503 | .def_DP = table->def, | |
504 | .grio = gred_rio_mode(table), | |
b38c7eef | 505 | .flags = table->red_flags, |
e0636822 | 506 | }; |
1da177e4 | 507 | |
1e90474c PM |
508 | opts = nla_nest_start(skb, TCA_OPTIONS); |
509 | if (opts == NULL) | |
510 | goto nla_put_failure; | |
511 | NLA_PUT(skb, TCA_GRED_DPS, sizeof(sopt), &sopt); | |
512 | parms = nla_nest_start(skb, TCA_GRED_PARMS); | |
513 | if (parms == NULL) | |
514 | goto nla_put_failure; | |
1da177e4 | 515 | |
05f1cc01 TG |
516 | for (i = 0; i < MAX_DPs; i++) { |
517 | struct gred_sched_data *q = table->tab[i]; | |
518 | struct tc_gred_qopt opt; | |
1da177e4 | 519 | |
05f1cc01 | 520 | memset(&opt, 0, sizeof(opt)); |
1da177e4 LT |
521 | |
522 | if (!q) { | |
523 | /* hack -- fix at some point with proper message | |
524 | This is how we indicate to tc that there is no VQ | |
525 | at this DP */ | |
526 | ||
05f1cc01 TG |
527 | opt.DP = MAX_DPs + i; |
528 | goto append_opt; | |
1da177e4 LT |
529 | } |
530 | ||
05f1cc01 TG |
531 | opt.limit = q->limit; |
532 | opt.DP = q->DP; | |
533 | opt.backlog = q->backlog; | |
534 | opt.prio = q->prio; | |
22b33429 TG |
535 | opt.qth_min = q->parms.qth_min >> q->parms.Wlog; |
536 | opt.qth_max = q->parms.qth_max >> q->parms.Wlog; | |
537 | opt.Wlog = q->parms.Wlog; | |
538 | opt.Plog = q->parms.Plog; | |
539 | opt.Scell_log = q->parms.Scell_log; | |
540 | opt.other = q->stats.other; | |
541 | opt.early = q->stats.prob_drop; | |
542 | opt.forced = q->stats.forced_drop; | |
543 | opt.pdrop = q->stats.pdrop; | |
05f1cc01 TG |
544 | opt.packets = q->packetsin; |
545 | opt.bytesin = q->bytesin; | |
546 | ||
22b33429 TG |
547 | if (gred_wred_mode(table)) { |
548 | q->parms.qidlestart = | |
549 | table->tab[table->def]->parms.qidlestart; | |
550 | q->parms.qavg = table->tab[table->def]->parms.qavg; | |
1da177e4 | 551 | } |
05f1cc01 | 552 | |
22b33429 TG |
553 | opt.qave = red_calc_qavg(&q->parms, q->parms.qavg); |
554 | ||
05f1cc01 | 555 | append_opt: |
1e90474c PM |
556 | if (nla_append(skb, sizeof(opt), &opt) < 0) |
557 | goto nla_put_failure; | |
1da177e4 LT |
558 | } |
559 | ||
1e90474c | 560 | nla_nest_end(skb, parms); |
1da177e4 | 561 | |
1e90474c | 562 | return nla_nest_end(skb, opts); |
1da177e4 | 563 | |
1e90474c | 564 | nla_put_failure: |
bc3ed28c TG |
565 | nla_nest_cancel(skb, opts); |
566 | return -EMSGSIZE; | |
1da177e4 LT |
567 | } |
568 | ||
569 | static void gred_destroy(struct Qdisc *sch) | |
570 | { | |
571 | struct gred_sched *table = qdisc_priv(sch); | |
572 | int i; | |
573 | ||
1e4dfaf9 | 574 | for (i = 0; i < table->DPs; i++) { |
1da177e4 | 575 | if (table->tab[i]) |
6639607e | 576 | gred_destroy_vq(table->tab[i]); |
1da177e4 LT |
577 | } |
578 | } | |
579 | ||
20fea08b | 580 | static struct Qdisc_ops gred_qdisc_ops __read_mostly = { |
1da177e4 LT |
581 | .id = "gred", |
582 | .priv_size = sizeof(struct gred_sched), | |
583 | .enqueue = gred_enqueue, | |
584 | .dequeue = gred_dequeue, | |
8e3af978 | 585 | .peek = qdisc_peek_head, |
1da177e4 LT |
586 | .drop = gred_drop, |
587 | .init = gred_init, | |
588 | .reset = gred_reset, | |
589 | .destroy = gred_destroy, | |
590 | .change = gred_change, | |
591 | .dump = gred_dump, | |
592 | .owner = THIS_MODULE, | |
593 | }; | |
594 | ||
595 | static int __init gred_module_init(void) | |
596 | { | |
597 | return register_qdisc(&gred_qdisc_ops); | |
598 | } | |
1e4dfaf9 TG |
599 | |
600 | static void __exit gred_module_exit(void) | |
1da177e4 LT |
601 | { |
602 | unregister_qdisc(&gred_qdisc_ops); | |
603 | } | |
1e4dfaf9 | 604 | |
1da177e4 LT |
605 | module_init(gred_module_init) |
606 | module_exit(gred_module_exit) | |
1e4dfaf9 | 607 | |
1da177e4 | 608 | MODULE_LICENSE("GPL"); |