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 | * | |
18 | * | |
19 | * | |
20 | * For all the glorious comments look at Alexey's sch_red.c | |
21 | */ | |
22 | ||
23 | #include <linux/config.h> | |
24 | #include <linux/module.h> | |
25 | #include <asm/uaccess.h> | |
26 | #include <asm/system.h> | |
27 | #include <linux/bitops.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/kernel.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/string.h> | |
32 | #include <linux/mm.h> | |
33 | #include <linux/socket.h> | |
34 | #include <linux/sockios.h> | |
35 | #include <linux/in.h> | |
36 | #include <linux/errno.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/if_ether.h> | |
39 | #include <linux/inet.h> | |
40 | #include <linux/netdevice.h> | |
41 | #include <linux/etherdevice.h> | |
42 | #include <linux/notifier.h> | |
43 | #include <net/ip.h> | |
44 | #include <net/route.h> | |
45 | #include <linux/skbuff.h> | |
46 | #include <net/sock.h> | |
47 | #include <net/pkt_sched.h> | |
22b33429 | 48 | #include <net/red.h> |
1da177e4 LT |
49 | |
50 | #if 1 /* control */ | |
51 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
52 | #else | |
53 | #define DPRINTK(format,args...) | |
54 | #endif | |
55 | ||
56 | #if 0 /* data */ | |
57 | #define D2PRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
58 | #else | |
59 | #define D2PRINTK(format,args...) | |
60 | #endif | |
61 | ||
f62d6b93 TG |
62 | #define GRED_DEF_PRIO (MAX_DPs / 2) |
63 | ||
1da177e4 LT |
64 | struct gred_sched_data; |
65 | struct gred_sched; | |
66 | ||
67 | struct gred_sched_data | |
68 | { | |
1da177e4 | 69 | u32 limit; /* HARD maximal queue length */ |
1da177e4 | 70 | u32 DP; /* the drop pramaters */ |
1da177e4 LT |
71 | u32 bytesin; /* bytes seen on virtualQ so far*/ |
72 | u32 packetsin; /* packets seen on virtualQ so far*/ | |
73 | u32 backlog; /* bytes on the virtualQ */ | |
1da177e4 LT |
74 | u8 prio; /* the prio of this vq */ |
75 | ||
22b33429 TG |
76 | struct red_parms parms; |
77 | struct red_stats stats; | |
1da177e4 LT |
78 | }; |
79 | ||
dea3f628 TG |
80 | enum { |
81 | GRED_WRED_MODE = 1, | |
d6fd4e96 | 82 | GRED_RIO_MODE, |
dea3f628 TG |
83 | }; |
84 | ||
1da177e4 LT |
85 | struct gred_sched |
86 | { | |
87 | struct gred_sched_data *tab[MAX_DPs]; | |
dea3f628 | 88 | unsigned long flags; |
1da177e4 LT |
89 | u32 DPs; |
90 | u32 def; | |
91 | u8 initd; | |
1da177e4 LT |
92 | }; |
93 | ||
dea3f628 TG |
94 | static inline int gred_wred_mode(struct gred_sched *table) |
95 | { | |
96 | return test_bit(GRED_WRED_MODE, &table->flags); | |
97 | } | |
98 | ||
99 | static inline void gred_enable_wred_mode(struct gred_sched *table) | |
100 | { | |
101 | __set_bit(GRED_WRED_MODE, &table->flags); | |
102 | } | |
103 | ||
104 | static inline void gred_disable_wred_mode(struct gred_sched *table) | |
105 | { | |
106 | __clear_bit(GRED_WRED_MODE, &table->flags); | |
107 | } | |
108 | ||
d6fd4e96 TG |
109 | static inline int gred_rio_mode(struct gred_sched *table) |
110 | { | |
111 | return test_bit(GRED_RIO_MODE, &table->flags); | |
112 | } | |
113 | ||
114 | static inline void gred_enable_rio_mode(struct gred_sched *table) | |
115 | { | |
116 | __set_bit(GRED_RIO_MODE, &table->flags); | |
117 | } | |
118 | ||
119 | static inline void gred_disable_rio_mode(struct gred_sched *table) | |
120 | { | |
121 | __clear_bit(GRED_RIO_MODE, &table->flags); | |
122 | } | |
123 | ||
dea3f628 TG |
124 | static inline int gred_wred_mode_check(struct Qdisc *sch) |
125 | { | |
126 | struct gred_sched *table = qdisc_priv(sch); | |
127 | int i; | |
128 | ||
129 | /* Really ugly O(n^2) but shouldn't be necessary too frequent. */ | |
130 | for (i = 0; i < table->DPs; i++) { | |
131 | struct gred_sched_data *q = table->tab[i]; | |
132 | int n; | |
133 | ||
134 | if (q == NULL) | |
135 | continue; | |
136 | ||
137 | for (n = 0; n < table->DPs; n++) | |
138 | if (table->tab[n] && table->tab[n] != q && | |
139 | table->tab[n]->prio == q->prio) | |
140 | return 1; | |
141 | } | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
22b33429 TG |
146 | static inline unsigned int gred_backlog(struct gred_sched *table, |
147 | struct gred_sched_data *q, | |
148 | struct Qdisc *sch) | |
149 | { | |
150 | if (gred_wred_mode(table)) | |
151 | return sch->qstats.backlog; | |
152 | else | |
153 | return q->backlog; | |
154 | } | |
155 | ||
1da177e4 LT |
156 | static int |
157 | gred_enqueue(struct sk_buff *skb, struct Qdisc* sch) | |
158 | { | |
1da177e4 LT |
159 | struct gred_sched_data *q=NULL; |
160 | struct gred_sched *t= qdisc_priv(sch); | |
22b33429 | 161 | unsigned long qavg = 0; |
1da177e4 LT |
162 | int i=0; |
163 | ||
164 | if (!t->initd && skb_queue_len(&sch->q) < (sch->dev->tx_queue_len ? : 1)) { | |
165 | D2PRINTK("NO GRED Queues setup yet! Enqueued anyway\n"); | |
166 | goto do_enqueue; | |
167 | } | |
168 | ||
169 | ||
170 | if ( ((skb->tc_index&0xf) > (t->DPs -1)) || !(q=t->tab[skb->tc_index&0xf])) { | |
171 | printk("GRED: setting to default (%d)\n ",t->def); | |
172 | if (!(q=t->tab[t->def])) { | |
173 | DPRINTK("GRED: setting to default FAILED! dropping!! " | |
174 | "(%d)\n ", t->def); | |
175 | goto drop; | |
176 | } | |
177 | /* fix tc_index? --could be controvesial but needed for | |
178 | requeueing */ | |
179 | skb->tc_index=(skb->tc_index&0xfffffff0) | t->def; | |
180 | } | |
181 | ||
182 | D2PRINTK("gred_enqueue virtualQ 0x%x classid %x backlog %d " | |
183 | "general backlog %d\n",skb->tc_index&0xf,sch->handle,q->backlog, | |
184 | sch->qstats.backlog); | |
185 | /* sum up all the qaves of prios <= to ours to get the new qave*/ | |
d6fd4e96 | 186 | if (!gred_wred_mode(t) && gred_rio_mode(t)) { |
1da177e4 LT |
187 | for (i=0;i<t->DPs;i++) { |
188 | if ((!t->tab[i]) || (i==q->DP)) | |
189 | continue; | |
190 | ||
22b33429 TG |
191 | if (t->tab[i]->prio < q->prio && |
192 | !red_is_idling(&t->tab[i]->parms)) | |
193 | qavg +=t->tab[i]->parms.qavg; | |
1da177e4 LT |
194 | } |
195 | ||
196 | } | |
197 | ||
198 | q->packetsin++; | |
199 | q->bytesin+=skb->len; | |
200 | ||
dea3f628 | 201 | if (gred_wred_mode(t)) { |
22b33429 TG |
202 | qavg = 0; |
203 | q->parms.qavg = t->tab[t->def]->parms.qavg; | |
204 | q->parms.qidlestart = t->tab[t->def]->parms.qidlestart; | |
1da177e4 LT |
205 | } |
206 | ||
22b33429 | 207 | q->parms.qavg = red_calc_qavg(&q->parms, gred_backlog(t, q, sch)); |
1da177e4 | 208 | |
22b33429 TG |
209 | if (red_is_idling(&q->parms)) |
210 | red_end_of_idle_period(&q->parms); | |
1da177e4 | 211 | |
dea3f628 | 212 | if (gred_wred_mode(t)) |
22b33429 | 213 | t->tab[t->def]->parms.qavg = q->parms.qavg; |
1da177e4 | 214 | |
22b33429 TG |
215 | switch (red_action(&q->parms, q->parms.qavg + qavg)) { |
216 | case RED_DONT_MARK: | |
217 | break; | |
1da177e4 | 218 | |
22b33429 TG |
219 | case RED_PROB_MARK: |
220 | sch->qstats.overlimits++; | |
221 | q->stats.prob_drop++; | |
222 | goto drop; | |
223 | ||
224 | case RED_HARD_MARK: | |
225 | sch->qstats.overlimits++; | |
226 | q->stats.forced_drop++; | |
227 | goto drop; | |
1da177e4 | 228 | } |
22b33429 TG |
229 | |
230 | if (q->backlog + skb->len <= q->limit) { | |
231 | q->backlog += skb->len; | |
232 | do_enqueue: | |
233 | __skb_queue_tail(&sch->q, skb); | |
234 | sch->qstats.backlog += skb->len; | |
235 | sch->bstats.bytes += skb->len; | |
236 | sch->bstats.packets++; | |
237 | return 0; | |
1da177e4 | 238 | } |
22b33429 TG |
239 | |
240 | q->stats.pdrop++; | |
241 | drop: | |
242 | kfree_skb(skb); | |
243 | sch->qstats.drops++; | |
244 | return NET_XMIT_DROP; | |
1da177e4 LT |
245 | } |
246 | ||
247 | static int | |
248 | gred_requeue(struct sk_buff *skb, struct Qdisc* sch) | |
249 | { | |
250 | struct gred_sched_data *q; | |
251 | struct gred_sched *t= qdisc_priv(sch); | |
252 | q= t->tab[(skb->tc_index&0xf)]; | |
253 | /* error checking here -- probably unnecessary */ | |
22b33429 TG |
254 | |
255 | if (red_is_idling(&q->parms)) | |
256 | red_end_of_idle_period(&q->parms); | |
1da177e4 LT |
257 | |
258 | __skb_queue_head(&sch->q, skb); | |
259 | sch->qstats.backlog += skb->len; | |
260 | sch->qstats.requeues++; | |
261 | q->backlog += skb->len; | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static struct sk_buff * | |
266 | gred_dequeue(struct Qdisc* sch) | |
267 | { | |
268 | struct sk_buff *skb; | |
269 | struct gred_sched_data *q; | |
270 | struct gred_sched *t= qdisc_priv(sch); | |
271 | ||
272 | skb = __skb_dequeue(&sch->q); | |
273 | if (skb) { | |
274 | sch->qstats.backlog -= skb->len; | |
275 | q= t->tab[(skb->tc_index&0xf)]; | |
276 | if (q) { | |
277 | q->backlog -= skb->len; | |
dea3f628 | 278 | if (!q->backlog && !gred_wred_mode(t)) |
22b33429 | 279 | red_start_of_idle_period(&q->parms); |
1da177e4 LT |
280 | } else { |
281 | D2PRINTK("gred_dequeue: skb has bad tcindex %x\n",skb->tc_index&0xf); | |
282 | } | |
283 | return skb; | |
284 | } | |
285 | ||
dea3f628 | 286 | if (gred_wred_mode(t)) { |
1da177e4 LT |
287 | q= t->tab[t->def]; |
288 | if (!q) | |
289 | D2PRINTK("no default VQ set: Results will be " | |
290 | "screwed up\n"); | |
291 | else | |
22b33429 | 292 | red_start_of_idle_period(&q->parms); |
1da177e4 LT |
293 | } |
294 | ||
295 | return NULL; | |
296 | } | |
297 | ||
298 | static unsigned int gred_drop(struct Qdisc* sch) | |
299 | { | |
300 | struct sk_buff *skb; | |
301 | ||
302 | struct gred_sched_data *q; | |
303 | struct gred_sched *t= qdisc_priv(sch); | |
304 | ||
305 | skb = __skb_dequeue_tail(&sch->q); | |
306 | if (skb) { | |
307 | unsigned int len = skb->len; | |
308 | sch->qstats.backlog -= len; | |
309 | sch->qstats.drops++; | |
310 | q= t->tab[(skb->tc_index&0xf)]; | |
311 | if (q) { | |
312 | q->backlog -= len; | |
22b33429 | 313 | q->stats.other++; |
dea3f628 | 314 | if (!q->backlog && !gred_wred_mode(t)) |
22b33429 | 315 | red_start_of_idle_period(&q->parms); |
1da177e4 LT |
316 | } else { |
317 | D2PRINTK("gred_dequeue: skb has bad tcindex %x\n",skb->tc_index&0xf); | |
318 | } | |
319 | ||
320 | kfree_skb(skb); | |
321 | return len; | |
322 | } | |
323 | ||
324 | q=t->tab[t->def]; | |
325 | if (!q) { | |
326 | D2PRINTK("no default VQ set: Results might be screwed up\n"); | |
327 | return 0; | |
328 | } | |
329 | ||
22b33429 | 330 | red_start_of_idle_period(&q->parms); |
1da177e4 LT |
331 | return 0; |
332 | ||
333 | } | |
334 | ||
335 | static void gred_reset(struct Qdisc* sch) | |
336 | { | |
337 | int i; | |
338 | struct gred_sched_data *q; | |
339 | struct gred_sched *t= qdisc_priv(sch); | |
340 | ||
341 | __skb_queue_purge(&sch->q); | |
342 | ||
343 | sch->qstats.backlog = 0; | |
344 | ||
345 | for (i=0;i<t->DPs;i++) { | |
346 | q= t->tab[i]; | |
347 | if (!q) | |
348 | continue; | |
22b33429 | 349 | red_restart(&q->parms); |
1da177e4 | 350 | q->backlog = 0; |
1da177e4 LT |
351 | } |
352 | } | |
353 | ||
6639607e TG |
354 | static inline void gred_destroy_vq(struct gred_sched_data *q) |
355 | { | |
356 | kfree(q); | |
357 | } | |
358 | ||
359 | static inline int gred_change_table_def(struct Qdisc *sch, struct rtattr *dps) | |
1da177e4 LT |
360 | { |
361 | struct gred_sched *table = qdisc_priv(sch); | |
1da177e4 | 362 | struct tc_gred_sopt *sopt; |
6639607e | 363 | int i; |
1da177e4 | 364 | |
6639607e | 365 | if (dps == NULL || RTA_PAYLOAD(dps) < sizeof(*sopt)) |
1da177e4 LT |
366 | return -EINVAL; |
367 | ||
6639607e | 368 | sopt = RTA_DATA(dps); |
1da177e4 | 369 | |
6639607e TG |
370 | if (sopt->DPs > MAX_DPs || sopt->DPs == 0 || sopt->def_DP >= sopt->DPs) |
371 | return -EINVAL; | |
1da177e4 | 372 | |
6639607e TG |
373 | sch_tree_lock(sch); |
374 | table->DPs = sopt->DPs; | |
375 | table->def = sopt->def_DP; | |
dea3f628 | 376 | |
6639607e TG |
377 | /* |
378 | * Every entry point to GRED is synchronized with the above code | |
379 | * and the DP is checked against DPs, i.e. shadowed VQs can no | |
380 | * longer be found so we can unlock right here. | |
381 | */ | |
382 | sch_tree_unlock(sch); | |
dea3f628 | 383 | |
6639607e TG |
384 | if (sopt->grio) { |
385 | gred_enable_rio_mode(table); | |
386 | gred_disable_wred_mode(table); | |
387 | if (gred_wred_mode_check(sch)) | |
388 | gred_enable_wred_mode(table); | |
389 | } else { | |
390 | gred_disable_rio_mode(table); | |
391 | gred_disable_wred_mode(table); | |
392 | } | |
393 | ||
394 | for (i = table->DPs; i < MAX_DPs; i++) { | |
395 | if (table->tab[i]) { | |
396 | printk(KERN_WARNING "GRED: Warning: Destroying " | |
397 | "shadowed VQ 0x%x\n", i); | |
398 | gred_destroy_vq(table->tab[i]); | |
399 | table->tab[i] = NULL; | |
400 | } | |
401 | } | |
1da177e4 | 402 | |
6639607e TG |
403 | table->initd = 0; |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
f62d6b93 TG |
408 | static inline int gred_change_vq(struct Qdisc *sch, int dp, |
409 | struct tc_gred_qopt *ctl, int prio, u8 *stab) | |
6639607e TG |
410 | { |
411 | struct gred_sched *table = qdisc_priv(sch); | |
412 | struct gred_sched_data *q; | |
f62d6b93 TG |
413 | |
414 | if (table->tab[dp] == NULL) { | |
415 | table->tab[dp] = kmalloc(sizeof(*q), GFP_KERNEL); | |
416 | if (table->tab[dp] == NULL) | |
417 | return -ENOMEM; | |
418 | memset(table->tab[dp], 0, sizeof(*q)); | |
419 | } | |
420 | ||
421 | q = table->tab[dp]; | |
422 | q->DP = dp; | |
423 | q->prio = prio; | |
f62d6b93 | 424 | q->limit = ctl->limit; |
22b33429 TG |
425 | |
426 | if (q->backlog == 0) | |
427 | red_end_of_idle_period(&q->parms); | |
428 | ||
429 | red_set_parms(&q->parms, | |
430 | ctl->qth_min, ctl->qth_max, ctl->Wlog, ctl->Plog, | |
431 | ctl->Scell_log, stab); | |
432 | ||
f62d6b93 TG |
433 | return 0; |
434 | } | |
435 | ||
436 | static int gred_change(struct Qdisc *sch, struct rtattr *opt) | |
437 | { | |
438 | struct gred_sched *table = qdisc_priv(sch); | |
6639607e | 439 | struct tc_gred_qopt *ctl; |
f62d6b93 TG |
440 | struct rtattr *tb[TCA_GRED_MAX]; |
441 | int err = -EINVAL, prio = GRED_DEF_PRIO; | |
442 | u8 *stab; | |
6639607e | 443 | |
f62d6b93 | 444 | if (opt == NULL || rtattr_parse_nested(tb, TCA_GRED_MAX, opt)) |
6639607e TG |
445 | return -EINVAL; |
446 | ||
447 | if (tb[TCA_GRED_PARMS-1] == NULL && tb[TCA_GRED_STAB-1] == NULL) | |
f62d6b93 | 448 | return gred_change_table_def(sch, opt); |
1da177e4 | 449 | |
f62d6b93 TG |
450 | if (tb[TCA_GRED_PARMS-1] == NULL || |
451 | RTA_PAYLOAD(tb[TCA_GRED_PARMS-1]) < sizeof(*ctl) || | |
452 | tb[TCA_GRED_STAB-1] == NULL || | |
453 | RTA_PAYLOAD(tb[TCA_GRED_STAB-1]) < 256) | |
454 | return -EINVAL; | |
1da177e4 LT |
455 | |
456 | ctl = RTA_DATA(tb[TCA_GRED_PARMS-1]); | |
f62d6b93 | 457 | stab = RTA_DATA(tb[TCA_GRED_STAB-1]); |
a8aaa995 TG |
458 | |
459 | if (ctl->DP >= table->DPs) | |
f62d6b93 | 460 | goto errout; |
1da177e4 | 461 | |
d6fd4e96 | 462 | if (gred_rio_mode(table)) { |
f62d6b93 TG |
463 | if (ctl->prio == 0) { |
464 | int def_prio = GRED_DEF_PRIO; | |
465 | ||
466 | if (table->tab[table->def]) | |
467 | def_prio = table->tab[table->def]->prio; | |
468 | ||
469 | printk(KERN_DEBUG "GRED: DP %u does not have a prio " | |
470 | "setting default to %d\n", ctl->DP, def_prio); | |
471 | ||
472 | prio = def_prio; | |
473 | } else | |
474 | prio = ctl->prio; | |
1da177e4 LT |
475 | } |
476 | ||
f62d6b93 | 477 | sch_tree_lock(sch); |
1da177e4 | 478 | |
f62d6b93 TG |
479 | err = gred_change_vq(sch, ctl->DP, ctl, prio, stab); |
480 | if (err < 0) | |
481 | goto errout_locked; | |
1da177e4 | 482 | |
f62d6b93 TG |
483 | if (table->tab[table->def] == NULL) { |
484 | if (gred_rio_mode(table)) | |
485 | prio = table->tab[ctl->DP]->prio; | |
486 | ||
487 | err = gred_change_vq(sch, table->def, ctl, prio, stab); | |
488 | if (err < 0) | |
489 | goto errout_locked; | |
490 | } | |
491 | ||
492 | table->initd = 1; | |
1da177e4 | 493 | |
d6fd4e96 | 494 | if (gred_rio_mode(table)) { |
dea3f628 TG |
495 | gred_disable_wred_mode(table); |
496 | if (gred_wred_mode_check(sch)) | |
497 | gred_enable_wred_mode(table); | |
1da177e4 LT |
498 | } |
499 | ||
f62d6b93 | 500 | err = 0; |
1da177e4 | 501 | |
f62d6b93 TG |
502 | errout_locked: |
503 | sch_tree_unlock(sch); | |
504 | errout: | |
505 | return err; | |
1da177e4 LT |
506 | } |
507 | ||
508 | static int gred_init(struct Qdisc *sch, struct rtattr *opt) | |
509 | { | |
6639607e | 510 | struct rtattr *tb[TCA_GRED_MAX]; |
1da177e4 | 511 | |
6639607e | 512 | if (opt == NULL || rtattr_parse_nested(tb, TCA_GRED_MAX, opt)) |
1da177e4 LT |
513 | return -EINVAL; |
514 | ||
6639607e TG |
515 | if (tb[TCA_GRED_PARMS-1] || tb[TCA_GRED_STAB-1]) |
516 | return -EINVAL; | |
1da177e4 | 517 | |
6639607e | 518 | return gred_change_table_def(sch, tb[TCA_GRED_DPS-1]); |
1da177e4 LT |
519 | } |
520 | ||
521 | static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) | |
522 | { | |
1da177e4 | 523 | struct gred_sched *table = qdisc_priv(sch); |
05f1cc01 | 524 | struct rtattr *parms, *opts = NULL; |
1da177e4 | 525 | int i; |
e0636822 TG |
526 | struct tc_gred_sopt sopt = { |
527 | .DPs = table->DPs, | |
528 | .def_DP = table->def, | |
529 | .grio = gred_rio_mode(table), | |
530 | }; | |
1da177e4 | 531 | |
05f1cc01 | 532 | opts = RTA_NEST(skb, TCA_OPTIONS); |
e0636822 | 533 | RTA_PUT(skb, TCA_GRED_DPS, sizeof(sopt), &sopt); |
05f1cc01 | 534 | parms = RTA_NEST(skb, TCA_GRED_PARMS); |
1da177e4 | 535 | |
05f1cc01 TG |
536 | for (i = 0; i < MAX_DPs; i++) { |
537 | struct gred_sched_data *q = table->tab[i]; | |
538 | struct tc_gred_qopt opt; | |
1da177e4 | 539 | |
05f1cc01 | 540 | memset(&opt, 0, sizeof(opt)); |
1da177e4 LT |
541 | |
542 | if (!q) { | |
543 | /* hack -- fix at some point with proper message | |
544 | This is how we indicate to tc that there is no VQ | |
545 | at this DP */ | |
546 | ||
05f1cc01 TG |
547 | opt.DP = MAX_DPs + i; |
548 | goto append_opt; | |
1da177e4 LT |
549 | } |
550 | ||
05f1cc01 TG |
551 | opt.limit = q->limit; |
552 | opt.DP = q->DP; | |
553 | opt.backlog = q->backlog; | |
554 | opt.prio = q->prio; | |
22b33429 TG |
555 | opt.qth_min = q->parms.qth_min >> q->parms.Wlog; |
556 | opt.qth_max = q->parms.qth_max >> q->parms.Wlog; | |
557 | opt.Wlog = q->parms.Wlog; | |
558 | opt.Plog = q->parms.Plog; | |
559 | opt.Scell_log = q->parms.Scell_log; | |
560 | opt.other = q->stats.other; | |
561 | opt.early = q->stats.prob_drop; | |
562 | opt.forced = q->stats.forced_drop; | |
563 | opt.pdrop = q->stats.pdrop; | |
05f1cc01 TG |
564 | opt.packets = q->packetsin; |
565 | opt.bytesin = q->bytesin; | |
566 | ||
22b33429 TG |
567 | if (gred_wred_mode(table)) { |
568 | q->parms.qidlestart = | |
569 | table->tab[table->def]->parms.qidlestart; | |
570 | q->parms.qavg = table->tab[table->def]->parms.qavg; | |
1da177e4 | 571 | } |
05f1cc01 | 572 | |
22b33429 TG |
573 | opt.qave = red_calc_qavg(&q->parms, q->parms.qavg); |
574 | ||
05f1cc01 TG |
575 | append_opt: |
576 | RTA_APPEND(skb, sizeof(opt), &opt); | |
1da177e4 LT |
577 | } |
578 | ||
05f1cc01 | 579 | RTA_NEST_END(skb, parms); |
1da177e4 | 580 | |
05f1cc01 | 581 | return RTA_NEST_END(skb, opts); |
1da177e4 LT |
582 | |
583 | rtattr_failure: | |
05f1cc01 | 584 | return RTA_NEST_CANCEL(skb, opts); |
1da177e4 LT |
585 | } |
586 | ||
587 | static void gred_destroy(struct Qdisc *sch) | |
588 | { | |
589 | struct gred_sched *table = qdisc_priv(sch); | |
590 | int i; | |
591 | ||
592 | for (i = 0;i < table->DPs; i++) { | |
593 | if (table->tab[i]) | |
6639607e | 594 | gred_destroy_vq(table->tab[i]); |
1da177e4 LT |
595 | } |
596 | } | |
597 | ||
598 | static struct Qdisc_ops gred_qdisc_ops = { | |
599 | .next = NULL, | |
600 | .cl_ops = NULL, | |
601 | .id = "gred", | |
602 | .priv_size = sizeof(struct gred_sched), | |
603 | .enqueue = gred_enqueue, | |
604 | .dequeue = gred_dequeue, | |
605 | .requeue = gred_requeue, | |
606 | .drop = gred_drop, | |
607 | .init = gred_init, | |
608 | .reset = gred_reset, | |
609 | .destroy = gred_destroy, | |
610 | .change = gred_change, | |
611 | .dump = gred_dump, | |
612 | .owner = THIS_MODULE, | |
613 | }; | |
614 | ||
615 | static int __init gred_module_init(void) | |
616 | { | |
617 | return register_qdisc(&gred_qdisc_ops); | |
618 | } | |
619 | static void __exit gred_module_exit(void) | |
620 | { | |
621 | unregister_qdisc(&gred_qdisc_ops); | |
622 | } | |
623 | module_init(gred_module_init) | |
624 | module_exit(gred_module_exit) | |
625 | MODULE_LICENSE("GPL"); |