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 | ||
21 | #include <linux/config.h> | |
22 | #include <linux/module.h> | |
1da177e4 LT |
23 | #include <linux/types.h> |
24 | #include <linux/kernel.h> | |
1da177e4 | 25 | #include <linux/netdevice.h> |
1da177e4 | 26 | #include <linux/skbuff.h> |
1da177e4 | 27 | #include <net/pkt_sched.h> |
22b33429 | 28 | #include <net/red.h> |
1da177e4 | 29 | |
f62d6b93 | 30 | #define GRED_DEF_PRIO (MAX_DPs / 2) |
716a1b40 | 31 | #define GRED_VQ_MASK (MAX_DPs - 1) |
f62d6b93 | 32 | |
1da177e4 LT |
33 | struct gred_sched_data; |
34 | struct gred_sched; | |
35 | ||
36 | struct gred_sched_data | |
37 | { | |
1da177e4 | 38 | u32 limit; /* HARD maximal queue length */ |
1da177e4 | 39 | u32 DP; /* the drop pramaters */ |
1da177e4 LT |
40 | u32 bytesin; /* bytes seen on virtualQ so far*/ |
41 | u32 packetsin; /* packets seen on virtualQ so far*/ | |
42 | u32 backlog; /* bytes on the virtualQ */ | |
1e4dfaf9 | 43 | u8 prio; /* the prio of this vq */ |
1da177e4 | 44 | |
22b33429 TG |
45 | struct red_parms parms; |
46 | struct red_stats stats; | |
1da177e4 LT |
47 | }; |
48 | ||
dea3f628 TG |
49 | enum { |
50 | GRED_WRED_MODE = 1, | |
d6fd4e96 | 51 | GRED_RIO_MODE, |
dea3f628 TG |
52 | }; |
53 | ||
1da177e4 LT |
54 | struct gred_sched |
55 | { | |
56 | struct gred_sched_data *tab[MAX_DPs]; | |
dea3f628 | 57 | unsigned long flags; |
b38c7eef | 58 | u32 red_flags; |
1e4dfaf9 TG |
59 | u32 DPs; |
60 | u32 def; | |
7051703b | 61 | struct red_parms wred_set; |
1da177e4 LT |
62 | }; |
63 | ||
dea3f628 TG |
64 | static inline int gred_wred_mode(struct gred_sched *table) |
65 | { | |
66 | return test_bit(GRED_WRED_MODE, &table->flags); | |
67 | } | |
68 | ||
69 | static inline void gred_enable_wred_mode(struct gred_sched *table) | |
70 | { | |
71 | __set_bit(GRED_WRED_MODE, &table->flags); | |
72 | } | |
73 | ||
74 | static inline void gred_disable_wred_mode(struct gred_sched *table) | |
75 | { | |
76 | __clear_bit(GRED_WRED_MODE, &table->flags); | |
77 | } | |
78 | ||
d6fd4e96 TG |
79 | static inline int gred_rio_mode(struct gred_sched *table) |
80 | { | |
81 | return test_bit(GRED_RIO_MODE, &table->flags); | |
82 | } | |
83 | ||
84 | static inline void gred_enable_rio_mode(struct gred_sched *table) | |
85 | { | |
86 | __set_bit(GRED_RIO_MODE, &table->flags); | |
87 | } | |
88 | ||
89 | static inline void gred_disable_rio_mode(struct gred_sched *table) | |
90 | { | |
91 | __clear_bit(GRED_RIO_MODE, &table->flags); | |
92 | } | |
93 | ||
dea3f628 TG |
94 | static inline int gred_wred_mode_check(struct Qdisc *sch) |
95 | { | |
96 | struct gred_sched *table = qdisc_priv(sch); | |
97 | int i; | |
98 | ||
99 | /* Really ugly O(n^2) but shouldn't be necessary too frequent. */ | |
100 | for (i = 0; i < table->DPs; i++) { | |
101 | struct gred_sched_data *q = table->tab[i]; | |
102 | int n; | |
103 | ||
104 | if (q == NULL) | |
105 | continue; | |
106 | ||
107 | for (n = 0; n < table->DPs; n++) | |
108 | if (table->tab[n] && table->tab[n] != q && | |
109 | table->tab[n]->prio == q->prio) | |
110 | return 1; | |
111 | } | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
22b33429 TG |
116 | static inline unsigned int gred_backlog(struct gred_sched *table, |
117 | struct gred_sched_data *q, | |
118 | struct Qdisc *sch) | |
119 | { | |
120 | if (gred_wred_mode(table)) | |
121 | return sch->qstats.backlog; | |
122 | else | |
123 | return q->backlog; | |
124 | } | |
125 | ||
716a1b40 TG |
126 | static inline u16 tc_index_to_dp(struct sk_buff *skb) |
127 | { | |
128 | return skb->tc_index & GRED_VQ_MASK; | |
129 | } | |
130 | ||
7051703b TG |
131 | static inline void gred_load_wred_set(struct gred_sched *table, |
132 | struct gred_sched_data *q) | |
133 | { | |
134 | q->parms.qavg = table->wred_set.qavg; | |
135 | q->parms.qidlestart = table->wred_set.qidlestart; | |
136 | } | |
137 | ||
138 | static inline void gred_store_wred_set(struct gred_sched *table, | |
139 | struct gred_sched_data *q) | |
140 | { | |
141 | table->wred_set.qavg = q->parms.qavg; | |
142 | } | |
143 | ||
b38c7eef TG |
144 | static inline int gred_use_ecn(struct gred_sched *t) |
145 | { | |
146 | return t->red_flags & TC_RED_ECN; | |
147 | } | |
148 | ||
bdc450a0 TG |
149 | static inline int gred_use_harddrop(struct gred_sched *t) |
150 | { | |
151 | return t->red_flags & TC_RED_HARDDROP; | |
152 | } | |
153 | ||
1e4dfaf9 | 154 | static int gred_enqueue(struct sk_buff *skb, struct Qdisc* sch) |
1da177e4 | 155 | { |
1da177e4 LT |
156 | struct gred_sched_data *q=NULL; |
157 | struct gred_sched *t= qdisc_priv(sch); | |
22b33429 | 158 | unsigned long qavg = 0; |
4a591834 | 159 | u16 dp = tc_index_to_dp(skb); |
1da177e4 | 160 | |
716a1b40 | 161 | if (dp >= t->DPs || (q = t->tab[dp]) == NULL) { |
18e3fb84 TG |
162 | dp = t->def; |
163 | ||
164 | if ((q = t->tab[dp]) == NULL) { | |
165 | /* Pass through packets not assigned to a DP | |
166 | * if no default DP has been configured. This | |
167 | * allows for DP flows to be left untouched. | |
168 | */ | |
169 | if (skb_queue_len(&sch->q) < sch->dev->tx_queue_len) | |
170 | return qdisc_enqueue_tail(skb, sch); | |
171 | else | |
172 | goto drop; | |
1da177e4 | 173 | } |
18e3fb84 | 174 | |
1da177e4 LT |
175 | /* fix tc_index? --could be controvesial but needed for |
176 | requeueing */ | |
18e3fb84 | 177 | skb->tc_index = (skb->tc_index & ~GRED_VQ_MASK) | dp; |
1da177e4 LT |
178 | } |
179 | ||
1e4dfaf9 | 180 | /* sum up all the qaves of prios <= to ours to get the new qave */ |
d6fd4e96 | 181 | if (!gred_wred_mode(t) && gred_rio_mode(t)) { |
1e4dfaf9 TG |
182 | int i; |
183 | ||
184 | for (i = 0; i < t->DPs; i++) { | |
185 | if (t->tab[i] && t->tab[i]->prio < q->prio && | |
22b33429 TG |
186 | !red_is_idling(&t->tab[i]->parms)) |
187 | qavg +=t->tab[i]->parms.qavg; | |
1da177e4 | 188 | } |
1e4dfaf9 | 189 | |
1da177e4 LT |
190 | } |
191 | ||
192 | q->packetsin++; | |
1e4dfaf9 | 193 | q->bytesin += skb->len; |
1da177e4 | 194 | |
1e4dfaf9 | 195 | if (gred_wred_mode(t)) |
7051703b | 196 | gred_load_wred_set(t, q); |
1da177e4 | 197 | |
22b33429 | 198 | q->parms.qavg = red_calc_qavg(&q->parms, gred_backlog(t, q, sch)); |
1da177e4 | 199 | |
22b33429 TG |
200 | if (red_is_idling(&q->parms)) |
201 | red_end_of_idle_period(&q->parms); | |
1da177e4 | 202 | |
dea3f628 | 203 | if (gred_wred_mode(t)) |
7051703b | 204 | gred_store_wred_set(t, q); |
1da177e4 | 205 | |
22b33429 TG |
206 | switch (red_action(&q->parms, q->parms.qavg + qavg)) { |
207 | case RED_DONT_MARK: | |
208 | break; | |
1da177e4 | 209 | |
22b33429 TG |
210 | case RED_PROB_MARK: |
211 | sch->qstats.overlimits++; | |
b38c7eef TG |
212 | if (!gred_use_ecn(t) || !INET_ECN_set_ce(skb)) { |
213 | q->stats.prob_drop++; | |
214 | goto congestion_drop; | |
215 | } | |
216 | ||
217 | q->stats.prob_mark++; | |
218 | break; | |
22b33429 TG |
219 | |
220 | case RED_HARD_MARK: | |
221 | sch->qstats.overlimits++; | |
bdc450a0 TG |
222 | if (gred_use_harddrop(t) || !gred_use_ecn(t) || |
223 | !INET_ECN_set_ce(skb)) { | |
b38c7eef TG |
224 | q->stats.forced_drop++; |
225 | goto congestion_drop; | |
226 | } | |
227 | q->stats.forced_mark++; | |
228 | break; | |
1da177e4 | 229 | } |
22b33429 TG |
230 | |
231 | if (q->backlog + skb->len <= q->limit) { | |
232 | q->backlog += skb->len; | |
edf7a7b1 | 233 | return qdisc_enqueue_tail(skb, sch); |
1da177e4 | 234 | } |
22b33429 TG |
235 | |
236 | q->stats.pdrop++; | |
237 | drop: | |
edf7a7b1 | 238 | return qdisc_drop(skb, sch); |
c3b553cd TG |
239 | |
240 | congestion_drop: | |
edf7a7b1 | 241 | qdisc_drop(skb, sch); |
c3b553cd | 242 | return NET_XMIT_CN; |
1da177e4 LT |
243 | } |
244 | ||
1e4dfaf9 | 245 | static int gred_requeue(struct sk_buff *skb, struct Qdisc* sch) |
1da177e4 | 246 | { |
716a1b40 | 247 | struct gred_sched *t = qdisc_priv(sch); |
18e3fb84 TG |
248 | struct gred_sched_data *q; |
249 | u16 dp = tc_index_to_dp(skb); | |
250 | ||
251 | if (dp >= t->DPs || (q = t->tab[dp]) == NULL) { | |
252 | if (net_ratelimit()) | |
253 | printk(KERN_WARNING "GRED: Unable to relocate VQ 0x%x " | |
254 | "for requeue, screwing up backlog.\n", | |
255 | tc_index_to_dp(skb)); | |
256 | } else { | |
257 | if (red_is_idling(&q->parms)) | |
258 | red_end_of_idle_period(&q->parms); | |
259 | q->backlog += skb->len; | |
260 | } | |
1da177e4 | 261 | |
edf7a7b1 | 262 | return qdisc_requeue(skb, sch); |
1da177e4 LT |
263 | } |
264 | ||
1e4dfaf9 | 265 | static struct sk_buff *gred_dequeue(struct Qdisc* sch) |
1da177e4 LT |
266 | { |
267 | struct sk_buff *skb; | |
1e4dfaf9 | 268 | struct gred_sched *t = qdisc_priv(sch); |
1da177e4 | 269 | |
edf7a7b1 TG |
270 | skb = qdisc_dequeue_head(sch); |
271 | ||
1da177e4 | 272 | if (skb) { |
1e4dfaf9 | 273 | struct gred_sched_data *q; |
18e3fb84 TG |
274 | u16 dp = tc_index_to_dp(skb); |
275 | ||
276 | if (dp >= t->DPs || (q = t->tab[dp]) == NULL) { | |
277 | if (net_ratelimit()) | |
278 | printk(KERN_WARNING "GRED: Unable to relocate " | |
279 | "VQ 0x%x after dequeue, screwing up " | |
280 | "backlog.\n", tc_index_to_dp(skb)); | |
281 | } else { | |
1da177e4 | 282 | q->backlog -= skb->len; |
18e3fb84 | 283 | |
dea3f628 | 284 | if (!q->backlog && !gred_wred_mode(t)) |
22b33429 | 285 | red_start_of_idle_period(&q->parms); |
1da177e4 | 286 | } |
18e3fb84 | 287 | |
1da177e4 LT |
288 | return skb; |
289 | } | |
290 | ||
d8f64e19 | 291 | if (gred_wred_mode(t) && !red_is_idling(&t->wred_set)) |
7051703b | 292 | red_start_of_idle_period(&t->wred_set); |
1da177e4 LT |
293 | |
294 | return NULL; | |
295 | } | |
296 | ||
297 | static unsigned int gred_drop(struct Qdisc* sch) | |
298 | { | |
299 | struct sk_buff *skb; | |
1e4dfaf9 | 300 | struct gred_sched *t = qdisc_priv(sch); |
1da177e4 | 301 | |
edf7a7b1 | 302 | skb = qdisc_dequeue_tail(sch); |
1da177e4 LT |
303 | if (skb) { |
304 | unsigned int len = skb->len; | |
1e4dfaf9 | 305 | struct gred_sched_data *q; |
18e3fb84 TG |
306 | u16 dp = tc_index_to_dp(skb); |
307 | ||
308 | if (dp >= t->DPs || (q = t->tab[dp]) == NULL) { | |
309 | if (net_ratelimit()) | |
310 | printk(KERN_WARNING "GRED: Unable to relocate " | |
311 | "VQ 0x%x while dropping, screwing up " | |
312 | "backlog.\n", tc_index_to_dp(skb)); | |
313 | } else { | |
1da177e4 | 314 | q->backlog -= len; |
22b33429 | 315 | q->stats.other++; |
18e3fb84 | 316 | |
dea3f628 | 317 | if (!q->backlog && !gred_wred_mode(t)) |
22b33429 | 318 | red_start_of_idle_period(&q->parms); |
1da177e4 LT |
319 | } |
320 | ||
edf7a7b1 | 321 | qdisc_drop(skb, sch); |
1da177e4 LT |
322 | return len; |
323 | } | |
324 | ||
d8f64e19 | 325 | if (gred_wred_mode(t) && !red_is_idling(&t->wred_set)) |
7051703b | 326 | red_start_of_idle_period(&t->wred_set); |
1da177e4 | 327 | |
1da177e4 LT |
328 | return 0; |
329 | ||
330 | } | |
331 | ||
332 | static void gred_reset(struct Qdisc* sch) | |
333 | { | |
334 | int i; | |
1e4dfaf9 | 335 | struct gred_sched *t = qdisc_priv(sch); |
1da177e4 | 336 | |
edf7a7b1 | 337 | qdisc_reset_queue(sch); |
1da177e4 | 338 | |
1e4dfaf9 TG |
339 | for (i = 0; i < t->DPs; i++) { |
340 | struct gred_sched_data *q = t->tab[i]; | |
341 | ||
342 | if (!q) | |
343 | continue; | |
344 | ||
22b33429 | 345 | red_restart(&q->parms); |
1da177e4 | 346 | q->backlog = 0; |
1da177e4 LT |
347 | } |
348 | } | |
349 | ||
6639607e TG |
350 | static inline void gred_destroy_vq(struct gred_sched_data *q) |
351 | { | |
352 | kfree(q); | |
353 | } | |
354 | ||
355 | static inline int gred_change_table_def(struct Qdisc *sch, struct rtattr *dps) | |
1da177e4 LT |
356 | { |
357 | struct gred_sched *table = qdisc_priv(sch); | |
1da177e4 | 358 | struct tc_gred_sopt *sopt; |
6639607e | 359 | int i; |
1da177e4 | 360 | |
6639607e | 361 | if (dps == NULL || RTA_PAYLOAD(dps) < sizeof(*sopt)) |
1da177e4 LT |
362 | return -EINVAL; |
363 | ||
6639607e | 364 | sopt = RTA_DATA(dps); |
1da177e4 | 365 | |
6639607e TG |
366 | if (sopt->DPs > MAX_DPs || sopt->DPs == 0 || sopt->def_DP >= sopt->DPs) |
367 | return -EINVAL; | |
1da177e4 | 368 | |
6639607e TG |
369 | sch_tree_lock(sch); |
370 | table->DPs = sopt->DPs; | |
371 | table->def = sopt->def_DP; | |
b38c7eef | 372 | table->red_flags = sopt->flags; |
dea3f628 | 373 | |
6639607e TG |
374 | /* |
375 | * Every entry point to GRED is synchronized with the above code | |
376 | * and the DP is checked against DPs, i.e. shadowed VQs can no | |
377 | * longer be found so we can unlock right here. | |
378 | */ | |
379 | sch_tree_unlock(sch); | |
dea3f628 | 380 | |
6639607e TG |
381 | if (sopt->grio) { |
382 | gred_enable_rio_mode(table); | |
383 | gred_disable_wred_mode(table); | |
384 | if (gred_wred_mode_check(sch)) | |
385 | gred_enable_wred_mode(table); | |
386 | } else { | |
387 | gred_disable_rio_mode(table); | |
388 | gred_disable_wred_mode(table); | |
389 | } | |
390 | ||
391 | for (i = table->DPs; i < MAX_DPs; i++) { | |
392 | if (table->tab[i]) { | |
393 | printk(KERN_WARNING "GRED: Warning: Destroying " | |
394 | "shadowed VQ 0x%x\n", i); | |
395 | gred_destroy_vq(table->tab[i]); | |
396 | table->tab[i] = NULL; | |
397 | } | |
398 | } | |
1da177e4 | 399 | |
6639607e TG |
400 | return 0; |
401 | } | |
402 | ||
f62d6b93 TG |
403 | static inline int gred_change_vq(struct Qdisc *sch, int dp, |
404 | struct tc_gred_qopt *ctl, int prio, u8 *stab) | |
6639607e TG |
405 | { |
406 | struct gred_sched *table = qdisc_priv(sch); | |
407 | struct gred_sched_data *q; | |
f62d6b93 TG |
408 | |
409 | if (table->tab[dp] == NULL) { | |
410 | table->tab[dp] = kmalloc(sizeof(*q), GFP_KERNEL); | |
411 | if (table->tab[dp] == NULL) | |
412 | return -ENOMEM; | |
413 | memset(table->tab[dp], 0, sizeof(*q)); | |
414 | } | |
415 | ||
416 | q = table->tab[dp]; | |
417 | q->DP = dp; | |
418 | q->prio = prio; | |
f62d6b93 | 419 | q->limit = ctl->limit; |
22b33429 TG |
420 | |
421 | if (q->backlog == 0) | |
422 | red_end_of_idle_period(&q->parms); | |
423 | ||
424 | red_set_parms(&q->parms, | |
425 | ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Plog, | |
426 | ctl->Scell_log, stab); | |
427 | ||
f62d6b93 TG |
428 | return 0; |
429 | } | |
430 | ||
431 | static int gred_change(struct Qdisc *sch, struct rtattr *opt) | |
432 | { | |
433 | struct gred_sched *table = qdisc_priv(sch); | |
6639607e | 434 | struct tc_gred_qopt *ctl; |
f62d6b93 TG |
435 | struct rtattr *tb[TCA_GRED_MAX]; |
436 | int err = -EINVAL, prio = GRED_DEF_PRIO; | |
437 | u8 *stab; | |
6639607e | 438 | |
f62d6b93 | 439 | if (opt == NULL || rtattr_parse_nested(tb, TCA_GRED_MAX, opt)) |
6639607e TG |
440 | return -EINVAL; |
441 | ||
442 | if (tb[TCA_GRED_PARMS-1] == NULL && tb[TCA_GRED_STAB-1] == NULL) | |
f62d6b93 | 443 | return gred_change_table_def(sch, opt); |
1da177e4 | 444 | |
f62d6b93 TG |
445 | if (tb[TCA_GRED_PARMS-1] == NULL || |
446 | RTA_PAYLOAD(tb[TCA_GRED_PARMS-1]) < sizeof(*ctl) || | |
447 | tb[TCA_GRED_STAB-1] == NULL || | |
448 | RTA_PAYLOAD(tb[TCA_GRED_STAB-1]) < 256) | |
449 | return -EINVAL; | |
1da177e4 LT |
450 | |
451 | ctl = RTA_DATA(tb[TCA_GRED_PARMS-1]); | |
f62d6b93 | 452 | stab = RTA_DATA(tb[TCA_GRED_STAB-1]); |
a8aaa995 TG |
453 | |
454 | if (ctl->DP >= table->DPs) | |
f62d6b93 | 455 | goto errout; |
1da177e4 | 456 | |
d6fd4e96 | 457 | if (gred_rio_mode(table)) { |
f62d6b93 TG |
458 | if (ctl->prio == 0) { |
459 | int def_prio = GRED_DEF_PRIO; | |
460 | ||
461 | if (table->tab[table->def]) | |
462 | def_prio = table->tab[table->def]->prio; | |
463 | ||
464 | printk(KERN_DEBUG "GRED: DP %u does not have a prio " | |
465 | "setting default to %d\n", ctl->DP, def_prio); | |
466 | ||
467 | prio = def_prio; | |
468 | } else | |
469 | prio = ctl->prio; | |
1da177e4 LT |
470 | } |
471 | ||
f62d6b93 | 472 | sch_tree_lock(sch); |
1da177e4 | 473 | |
f62d6b93 TG |
474 | err = gred_change_vq(sch, ctl->DP, ctl, prio, stab); |
475 | if (err < 0) | |
476 | goto errout_locked; | |
1da177e4 | 477 | |
d6fd4e96 | 478 | if (gred_rio_mode(table)) { |
dea3f628 TG |
479 | gred_disable_wred_mode(table); |
480 | if (gred_wred_mode_check(sch)) | |
481 | gred_enable_wred_mode(table); | |
1da177e4 LT |
482 | } |
483 | ||
f62d6b93 | 484 | err = 0; |
1da177e4 | 485 | |
f62d6b93 TG |
486 | errout_locked: |
487 | sch_tree_unlock(sch); | |
488 | errout: | |
489 | return err; | |
1da177e4 LT |
490 | } |
491 | ||
492 | static int gred_init(struct Qdisc *sch, struct rtattr *opt) | |
493 | { | |
6639607e | 494 | struct rtattr *tb[TCA_GRED_MAX]; |
1da177e4 | 495 | |
6639607e | 496 | if (opt == NULL || rtattr_parse_nested(tb, TCA_GRED_MAX, opt)) |
1da177e4 LT |
497 | return -EINVAL; |
498 | ||
6639607e TG |
499 | if (tb[TCA_GRED_PARMS-1] || tb[TCA_GRED_STAB-1]) |
500 | return -EINVAL; | |
1da177e4 | 501 | |
6639607e | 502 | return gred_change_table_def(sch, tb[TCA_GRED_DPS-1]); |
1da177e4 LT |
503 | } |
504 | ||
505 | static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) | |
506 | { | |
1da177e4 | 507 | struct gred_sched *table = qdisc_priv(sch); |
05f1cc01 | 508 | struct rtattr *parms, *opts = NULL; |
1da177e4 | 509 | int i; |
e0636822 TG |
510 | struct tc_gred_sopt sopt = { |
511 | .DPs = table->DPs, | |
512 | .def_DP = table->def, | |
513 | .grio = gred_rio_mode(table), | |
b38c7eef | 514 | .flags = table->red_flags, |
e0636822 | 515 | }; |
1da177e4 | 516 | |
05f1cc01 | 517 | opts = RTA_NEST(skb, TCA_OPTIONS); |
e0636822 | 518 | RTA_PUT(skb, TCA_GRED_DPS, sizeof(sopt), &sopt); |
05f1cc01 | 519 | parms = RTA_NEST(skb, TCA_GRED_PARMS); |
1da177e4 | 520 | |
05f1cc01 TG |
521 | for (i = 0; i < MAX_DPs; i++) { |
522 | struct gred_sched_data *q = table->tab[i]; | |
523 | struct tc_gred_qopt opt; | |
1da177e4 | 524 | |
05f1cc01 | 525 | memset(&opt, 0, sizeof(opt)); |
1da177e4 LT |
526 | |
527 | if (!q) { | |
528 | /* hack -- fix at some point with proper message | |
529 | This is how we indicate to tc that there is no VQ | |
530 | at this DP */ | |
531 | ||
05f1cc01 TG |
532 | opt.DP = MAX_DPs + i; |
533 | goto append_opt; | |
1da177e4 LT |
534 | } |
535 | ||
05f1cc01 TG |
536 | opt.limit = q->limit; |
537 | opt.DP = q->DP; | |
538 | opt.backlog = q->backlog; | |
539 | opt.prio = q->prio; | |
22b33429 TG |
540 | opt.qth_min = q->parms.qth_min >> q->parms.Wlog; |
541 | opt.qth_max = q->parms.qth_max >> q->parms.Wlog; | |
542 | opt.Wlog = q->parms.Wlog; | |
543 | opt.Plog = q->parms.Plog; | |
544 | opt.Scell_log = q->parms.Scell_log; | |
545 | opt.other = q->stats.other; | |
546 | opt.early = q->stats.prob_drop; | |
547 | opt.forced = q->stats.forced_drop; | |
548 | opt.pdrop = q->stats.pdrop; | |
05f1cc01 TG |
549 | opt.packets = q->packetsin; |
550 | opt.bytesin = q->bytesin; | |
551 | ||
22b33429 TG |
552 | if (gred_wred_mode(table)) { |
553 | q->parms.qidlestart = | |
554 | table->tab[table->def]->parms.qidlestart; | |
555 | q->parms.qavg = table->tab[table->def]->parms.qavg; | |
1da177e4 | 556 | } |
05f1cc01 | 557 | |
22b33429 TG |
558 | opt.qave = red_calc_qavg(&q->parms, q->parms.qavg); |
559 | ||
05f1cc01 TG |
560 | append_opt: |
561 | RTA_APPEND(skb, sizeof(opt), &opt); | |
1da177e4 LT |
562 | } |
563 | ||
05f1cc01 | 564 | RTA_NEST_END(skb, parms); |
1da177e4 | 565 | |
05f1cc01 | 566 | return RTA_NEST_END(skb, opts); |
1da177e4 LT |
567 | |
568 | rtattr_failure: | |
05f1cc01 | 569 | return RTA_NEST_CANCEL(skb, opts); |
1da177e4 LT |
570 | } |
571 | ||
572 | static void gred_destroy(struct Qdisc *sch) | |
573 | { | |
574 | struct gred_sched *table = qdisc_priv(sch); | |
575 | int i; | |
576 | ||
1e4dfaf9 | 577 | for (i = 0; i < table->DPs; i++) { |
1da177e4 | 578 | if (table->tab[i]) |
6639607e | 579 | gred_destroy_vq(table->tab[i]); |
1da177e4 LT |
580 | } |
581 | } | |
582 | ||
583 | static struct Qdisc_ops gred_qdisc_ops = { | |
1da177e4 LT |
584 | .id = "gred", |
585 | .priv_size = sizeof(struct gred_sched), | |
586 | .enqueue = gred_enqueue, | |
587 | .dequeue = gred_dequeue, | |
588 | .requeue = gred_requeue, | |
589 | .drop = gred_drop, | |
590 | .init = gred_init, | |
591 | .reset = gred_reset, | |
592 | .destroy = gred_destroy, | |
593 | .change = gred_change, | |
594 | .dump = gred_dump, | |
595 | .owner = THIS_MODULE, | |
596 | }; | |
597 | ||
598 | static int __init gred_module_init(void) | |
599 | { | |
600 | return register_qdisc(&gred_qdisc_ops); | |
601 | } | |
1e4dfaf9 TG |
602 | |
603 | static void __exit gred_module_exit(void) | |
1da177e4 LT |
604 | { |
605 | unregister_qdisc(&gred_qdisc_ops); | |
606 | } | |
1e4dfaf9 | 607 | |
1da177e4 LT |
608 | module_init(gred_module_init) |
609 | module_exit(gred_module_exit) | |
1e4dfaf9 | 610 | |
1da177e4 | 611 | MODULE_LICENSE("GPL"); |