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authorPatrick McHardy <kaber@trash.net>2006-01-09 01:22:14 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-09 17:16:14 -0500
commit4bba3925924148c24fb0c7636a04ad69a6a56b84 (patch)
tree9f8af6ab6509dd1bf3dcb7232a4e6fdc8cbf8629 /net/sched/police.c
parent541673c859c0d71dedaaea1c148dfe3ccccc9422 (diff)
[PKT_SCHED]: Prefix tc actions with act_
Clean up the net/sched directory a bit by prefix all actions with act_. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/police.c')
-rw-r--r--net/sched/police.c604
1 files changed, 0 insertions, 604 deletions
diff --git a/net/sched/police.c b/net/sched/police.c
deleted file mode 100644
index fa877f8f652c..000000000000
--- a/net/sched/police.c
+++ /dev/null
@@ -1,604 +0,0 @@
1/*
2 * net/sched/police.c Input police filter.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * J Hadi Salim (action changes)
11 */
12
13#include <asm/uaccess.h>
14#include <asm/system.h>
15#include <linux/bitops.h>
16#include <linux/config.h>
17#include <linux/module.h>
18#include <linux/types.h>
19#include <linux/kernel.h>
20#include <linux/sched.h>
21#include <linux/string.h>
22#include <linux/mm.h>
23#include <linux/socket.h>
24#include <linux/sockios.h>
25#include <linux/in.h>
26#include <linux/errno.h>
27#include <linux/interrupt.h>
28#include <linux/netdevice.h>
29#include <linux/skbuff.h>
30#include <linux/module.h>
31#include <linux/rtnetlink.h>
32#include <linux/init.h>
33#include <net/sock.h>
34#include <net/act_api.h>
35
36#define L2T(p,L) ((p)->R_tab->data[(L)>>(p)->R_tab->rate.cell_log])
37#define L2T_P(p,L) ((p)->P_tab->data[(L)>>(p)->P_tab->rate.cell_log])
38#define PRIV(a) ((struct tcf_police *) (a)->priv)
39
40/* use generic hash table */
41#define MY_TAB_SIZE 16
42#define MY_TAB_MASK 15
43static u32 idx_gen;
44static struct tcf_police *tcf_police_ht[MY_TAB_SIZE];
45/* Policer hash table lock */
46static DEFINE_RWLOCK(police_lock);
47
48/* Each policer is serialized by its individual spinlock */
49
50static __inline__ unsigned tcf_police_hash(u32 index)
51{
52 return index&0xF;
53}
54
55static __inline__ struct tcf_police * tcf_police_lookup(u32 index)
56{
57 struct tcf_police *p;
58
59 read_lock(&police_lock);
60 for (p = tcf_police_ht[tcf_police_hash(index)]; p; p = p->next) {
61 if (p->index == index)
62 break;
63 }
64 read_unlock(&police_lock);
65 return p;
66}
67
68#ifdef CONFIG_NET_CLS_ACT
69static int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
70 int type, struct tc_action *a)
71{
72 struct tcf_police *p;
73 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
74 struct rtattr *r;
75
76 read_lock(&police_lock);
77
78 s_i = cb->args[0];
79
80 for (i = 0; i < MY_TAB_SIZE; i++) {
81 p = tcf_police_ht[tcf_police_hash(i)];
82
83 for (; p; p = p->next) {
84 index++;
85 if (index < s_i)
86 continue;
87 a->priv = p;
88 a->order = index;
89 r = (struct rtattr*) skb->tail;
90 RTA_PUT(skb, a->order, 0, NULL);
91 if (type == RTM_DELACTION)
92 err = tcf_action_dump_1(skb, a, 0, 1);
93 else
94 err = tcf_action_dump_1(skb, a, 0, 0);
95 if (err < 0) {
96 index--;
97 skb_trim(skb, (u8*)r - skb->data);
98 goto done;
99 }
100 r->rta_len = skb->tail - (u8*)r;
101 n_i++;
102 }
103 }
104done:
105 read_unlock(&police_lock);
106 if (n_i)
107 cb->args[0] += n_i;
108 return n_i;
109
110rtattr_failure:
111 skb_trim(skb, (u8*)r - skb->data);
112 goto done;
113}
114
115static inline int
116tcf_hash_search(struct tc_action *a, u32 index)
117{
118 struct tcf_police *p = tcf_police_lookup(index);
119
120 if (p != NULL) {
121 a->priv = p;
122 return 1;
123 } else {
124 return 0;
125 }
126}
127#endif
128
129static inline u32 tcf_police_new_index(void)
130{
131 do {
132 if (++idx_gen == 0)
133 idx_gen = 1;
134 } while (tcf_police_lookup(idx_gen));
135
136 return idx_gen;
137}
138
139void tcf_police_destroy(struct tcf_police *p)
140{
141 unsigned h = tcf_police_hash(p->index);
142 struct tcf_police **p1p;
143
144 for (p1p = &tcf_police_ht[h]; *p1p; p1p = &(*p1p)->next) {
145 if (*p1p == p) {
146 write_lock_bh(&police_lock);
147 *p1p = p->next;
148 write_unlock_bh(&police_lock);
149#ifdef CONFIG_NET_ESTIMATOR
150 gen_kill_estimator(&p->bstats, &p->rate_est);
151#endif
152 if (p->R_tab)
153 qdisc_put_rtab(p->R_tab);
154 if (p->P_tab)
155 qdisc_put_rtab(p->P_tab);
156 kfree(p);
157 return;
158 }
159 }
160 BUG_TRAP(0);
161}
162
163#ifdef CONFIG_NET_CLS_ACT
164static int tcf_act_police_locate(struct rtattr *rta, struct rtattr *est,
165 struct tc_action *a, int ovr, int bind)
166{
167 unsigned h;
168 int ret = 0, err;
169 struct rtattr *tb[TCA_POLICE_MAX];
170 struct tc_police *parm;
171 struct tcf_police *p;
172 struct qdisc_rate_table *R_tab = NULL, *P_tab = NULL;
173
174 if (rta == NULL || rtattr_parse_nested(tb, TCA_POLICE_MAX, rta) < 0)
175 return -EINVAL;
176
177 if (tb[TCA_POLICE_TBF-1] == NULL ||
178 RTA_PAYLOAD(tb[TCA_POLICE_TBF-1]) != sizeof(*parm))
179 return -EINVAL;
180 parm = RTA_DATA(tb[TCA_POLICE_TBF-1]);
181
182 if (tb[TCA_POLICE_RESULT-1] != NULL &&
183 RTA_PAYLOAD(tb[TCA_POLICE_RESULT-1]) != sizeof(u32))
184 return -EINVAL;
185 if (tb[TCA_POLICE_RESULT-1] != NULL &&
186 RTA_PAYLOAD(tb[TCA_POLICE_RESULT-1]) != sizeof(u32))
187 return -EINVAL;
188
189 if (parm->index && (p = tcf_police_lookup(parm->index)) != NULL) {
190 a->priv = p;
191 if (bind) {
192 p->bindcnt += 1;
193 p->refcnt += 1;
194 }
195 if (ovr)
196 goto override;
197 return ret;
198 }
199
200 p = kmalloc(sizeof(*p), GFP_KERNEL);
201 if (p == NULL)
202 return -ENOMEM;
203 memset(p, 0, sizeof(*p));
204
205 ret = ACT_P_CREATED;
206 p->refcnt = 1;
207 spin_lock_init(&p->lock);
208 p->stats_lock = &p->lock;
209 if (bind)
210 p->bindcnt = 1;
211override:
212 if (parm->rate.rate) {
213 err = -ENOMEM;
214 R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE-1]);
215 if (R_tab == NULL)
216 goto failure;
217 if (parm->peakrate.rate) {
218 P_tab = qdisc_get_rtab(&parm->peakrate,
219 tb[TCA_POLICE_PEAKRATE-1]);
220 if (p->P_tab == NULL) {
221 qdisc_put_rtab(R_tab);
222 goto failure;
223 }
224 }
225 }
226 /* No failure allowed after this point */
227 spin_lock_bh(&p->lock);
228 if (R_tab != NULL) {
229 qdisc_put_rtab(p->R_tab);
230 p->R_tab = R_tab;
231 }
232 if (P_tab != NULL) {
233 qdisc_put_rtab(p->P_tab);
234 p->P_tab = P_tab;
235 }
236
237 if (tb[TCA_POLICE_RESULT-1])
238 p->result = *(u32*)RTA_DATA(tb[TCA_POLICE_RESULT-1]);
239 p->toks = p->burst = parm->burst;
240 p->mtu = parm->mtu;
241 if (p->mtu == 0) {
242 p->mtu = ~0;
243 if (p->R_tab)
244 p->mtu = 255<<p->R_tab->rate.cell_log;
245 }
246 if (p->P_tab)
247 p->ptoks = L2T_P(p, p->mtu);
248 p->action = parm->action;
249
250#ifdef CONFIG_NET_ESTIMATOR
251 if (tb[TCA_POLICE_AVRATE-1])
252 p->ewma_rate = *(u32*)RTA_DATA(tb[TCA_POLICE_AVRATE-1]);
253 if (est)
254 gen_replace_estimator(&p->bstats, &p->rate_est, p->stats_lock, est);
255#endif
256
257 spin_unlock_bh(&p->lock);
258 if (ret != ACT_P_CREATED)
259 return ret;
260
261 PSCHED_GET_TIME(p->t_c);
262 p->index = parm->index ? : tcf_police_new_index();
263 h = tcf_police_hash(p->index);
264 write_lock_bh(&police_lock);
265 p->next = tcf_police_ht[h];
266 tcf_police_ht[h] = p;
267 write_unlock_bh(&police_lock);
268
269 a->priv = p;
270 return ret;
271
272failure:
273 if (ret == ACT_P_CREATED)
274 kfree(p);
275 return err;
276}
277
278static int tcf_act_police_cleanup(struct tc_action *a, int bind)
279{
280 struct tcf_police *p = PRIV(a);
281
282 if (p != NULL)
283 return tcf_police_release(p, bind);
284 return 0;
285}
286
287static int tcf_act_police(struct sk_buff *skb, struct tc_action *a,
288 struct tcf_result *res)
289{
290 psched_time_t now;
291 struct tcf_police *p = PRIV(a);
292 long toks;
293 long ptoks = 0;
294
295 spin_lock(&p->lock);
296
297 p->bstats.bytes += skb->len;
298 p->bstats.packets++;
299
300#ifdef CONFIG_NET_ESTIMATOR
301 if (p->ewma_rate && p->rate_est.bps >= p->ewma_rate) {
302 p->qstats.overlimits++;
303 spin_unlock(&p->lock);
304 return p->action;
305 }
306#endif
307
308 if (skb->len <= p->mtu) {
309 if (p->R_tab == NULL) {
310 spin_unlock(&p->lock);
311 return p->result;
312 }
313
314 PSCHED_GET_TIME(now);
315
316 toks = PSCHED_TDIFF_SAFE(now, p->t_c, p->burst);
317
318 if (p->P_tab) {
319 ptoks = toks + p->ptoks;
320 if (ptoks > (long)L2T_P(p, p->mtu))
321 ptoks = (long)L2T_P(p, p->mtu);
322 ptoks -= L2T_P(p, skb->len);
323 }
324 toks += p->toks;
325 if (toks > (long)p->burst)
326 toks = p->burst;
327 toks -= L2T(p, skb->len);
328
329 if ((toks|ptoks) >= 0) {
330 p->t_c = now;
331 p->toks = toks;
332 p->ptoks = ptoks;
333 spin_unlock(&p->lock);
334 return p->result;
335 }
336 }
337
338 p->qstats.overlimits++;
339 spin_unlock(&p->lock);
340 return p->action;
341}
342
343static int
344tcf_act_police_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
345{
346 unsigned char *b = skb->tail;
347 struct tc_police opt;
348 struct tcf_police *p = PRIV(a);
349
350 opt.index = p->index;
351 opt.action = p->action;
352 opt.mtu = p->mtu;
353 opt.burst = p->burst;
354 opt.refcnt = p->refcnt - ref;
355 opt.bindcnt = p->bindcnt - bind;
356 if (p->R_tab)
357 opt.rate = p->R_tab->rate;
358 else
359 memset(&opt.rate, 0, sizeof(opt.rate));
360 if (p->P_tab)
361 opt.peakrate = p->P_tab->rate;
362 else
363 memset(&opt.peakrate, 0, sizeof(opt.peakrate));
364 RTA_PUT(skb, TCA_POLICE_TBF, sizeof(opt), &opt);
365 if (p->result)
366 RTA_PUT(skb, TCA_POLICE_RESULT, sizeof(int), &p->result);
367#ifdef CONFIG_NET_ESTIMATOR
368 if (p->ewma_rate)
369 RTA_PUT(skb, TCA_POLICE_AVRATE, 4, &p->ewma_rate);
370#endif
371 return skb->len;
372
373rtattr_failure:
374 skb_trim(skb, b - skb->data);
375 return -1;
376}
377
378MODULE_AUTHOR("Alexey Kuznetsov");
379MODULE_DESCRIPTION("Policing actions");
380MODULE_LICENSE("GPL");
381
382static struct tc_action_ops act_police_ops = {
383 .kind = "police",
384 .type = TCA_ID_POLICE,
385 .capab = TCA_CAP_NONE,
386 .owner = THIS_MODULE,
387 .act = tcf_act_police,
388 .dump = tcf_act_police_dump,
389 .cleanup = tcf_act_police_cleanup,
390 .lookup = tcf_hash_search,
391 .init = tcf_act_police_locate,
392 .walk = tcf_generic_walker
393};
394
395static int __init
396police_init_module(void)
397{
398 return tcf_register_action(&act_police_ops);
399}
400
401static void __exit
402police_cleanup_module(void)
403{
404 tcf_unregister_action(&act_police_ops);
405}
406
407module_init(police_init_module);
408module_exit(police_cleanup_module);
409
410#else /* CONFIG_NET_CLS_ACT */
411
412struct tcf_police * tcf_police_locate(struct rtattr *rta, struct rtattr *est)
413{
414 unsigned h;
415 struct tcf_police *p;
416 struct rtattr *tb[TCA_POLICE_MAX];
417 struct tc_police *parm;
418
419 if (rtattr_parse_nested(tb, TCA_POLICE_MAX, rta) < 0)
420 return NULL;
421
422 if (tb[TCA_POLICE_TBF-1] == NULL ||
423 RTA_PAYLOAD(tb[TCA_POLICE_TBF-1]) != sizeof(*parm))
424 return NULL;
425
426 parm = RTA_DATA(tb[TCA_POLICE_TBF-1]);
427
428 if (parm->index && (p = tcf_police_lookup(parm->index)) != NULL) {
429 p->refcnt++;
430 return p;
431 }
432
433 p = kmalloc(sizeof(*p), GFP_KERNEL);
434 if (p == NULL)
435 return NULL;
436
437 memset(p, 0, sizeof(*p));
438 p->refcnt = 1;
439 spin_lock_init(&p->lock);
440 p->stats_lock = &p->lock;
441 if (parm->rate.rate) {
442 p->R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE-1]);
443 if (p->R_tab == NULL)
444 goto failure;
445 if (parm->peakrate.rate) {
446 p->P_tab = qdisc_get_rtab(&parm->peakrate,
447 tb[TCA_POLICE_PEAKRATE-1]);
448 if (p->P_tab == NULL)
449 goto failure;
450 }
451 }
452 if (tb[TCA_POLICE_RESULT-1]) {
453 if (RTA_PAYLOAD(tb[TCA_POLICE_RESULT-1]) != sizeof(u32))
454 goto failure;
455 p->result = *(u32*)RTA_DATA(tb[TCA_POLICE_RESULT-1]);
456 }
457#ifdef CONFIG_NET_ESTIMATOR
458 if (tb[TCA_POLICE_AVRATE-1]) {
459 if (RTA_PAYLOAD(tb[TCA_POLICE_AVRATE-1]) != sizeof(u32))
460 goto failure;
461 p->ewma_rate = *(u32*)RTA_DATA(tb[TCA_POLICE_AVRATE-1]);
462 }
463#endif
464 p->toks = p->burst = parm->burst;
465 p->mtu = parm->mtu;
466 if (p->mtu == 0) {
467 p->mtu = ~0;
468 if (p->R_tab)
469 p->mtu = 255<<p->R_tab->rate.cell_log;
470 }
471 if (p->P_tab)
472 p->ptoks = L2T_P(p, p->mtu);
473 PSCHED_GET_TIME(p->t_c);
474 p->index = parm->index ? : tcf_police_new_index();
475 p->action = parm->action;
476#ifdef CONFIG_NET_ESTIMATOR
477 if (est)
478 gen_new_estimator(&p->bstats, &p->rate_est, p->stats_lock, est);
479#endif
480 h = tcf_police_hash(p->index);
481 write_lock_bh(&police_lock);
482 p->next = tcf_police_ht[h];
483 tcf_police_ht[h] = p;
484 write_unlock_bh(&police_lock);
485 return p;
486
487failure:
488 if (p->R_tab)
489 qdisc_put_rtab(p->R_tab);
490 kfree(p);
491 return NULL;
492}
493
494int tcf_police(struct sk_buff *skb, struct tcf_police *p)
495{
496 psched_time_t now;
497 long toks;
498 long ptoks = 0;
499
500 spin_lock(&p->lock);
501
502 p->bstats.bytes += skb->len;
503 p->bstats.packets++;
504
505#ifdef CONFIG_NET_ESTIMATOR
506 if (p->ewma_rate && p->rate_est.bps >= p->ewma_rate) {
507 p->qstats.overlimits++;
508 spin_unlock(&p->lock);
509 return p->action;
510 }
511#endif
512
513 if (skb->len <= p->mtu) {
514 if (p->R_tab == NULL) {
515 spin_unlock(&p->lock);
516 return p->result;
517 }
518
519 PSCHED_GET_TIME(now);
520
521 toks = PSCHED_TDIFF_SAFE(now, p->t_c, p->burst);
522
523 if (p->P_tab) {
524 ptoks = toks + p->ptoks;
525 if (ptoks > (long)L2T_P(p, p->mtu))
526 ptoks = (long)L2T_P(p, p->mtu);
527 ptoks -= L2T_P(p, skb->len);
528 }
529 toks += p->toks;
530 if (toks > (long)p->burst)
531 toks = p->burst;
532 toks -= L2T(p, skb->len);
533
534 if ((toks|ptoks) >= 0) {
535 p->t_c = now;
536 p->toks = toks;
537 p->ptoks = ptoks;
538 spin_unlock(&p->lock);
539 return p->result;
540 }
541 }
542
543 p->qstats.overlimits++;
544 spin_unlock(&p->lock);
545 return p->action;
546}
547EXPORT_SYMBOL(tcf_police);
548
549int tcf_police_dump(struct sk_buff *skb, struct tcf_police *p)
550{
551 unsigned char *b = skb->tail;
552 struct tc_police opt;
553
554 opt.index = p->index;
555 opt.action = p->action;
556 opt.mtu = p->mtu;
557 opt.burst = p->burst;
558 if (p->R_tab)
559 opt.rate = p->R_tab->rate;
560 else
561 memset(&opt.rate, 0, sizeof(opt.rate));
562 if (p->P_tab)
563 opt.peakrate = p->P_tab->rate;
564 else
565 memset(&opt.peakrate, 0, sizeof(opt.peakrate));
566 RTA_PUT(skb, TCA_POLICE_TBF, sizeof(opt), &opt);
567 if (p->result)
568 RTA_PUT(skb, TCA_POLICE_RESULT, sizeof(int), &p->result);
569#ifdef CONFIG_NET_ESTIMATOR
570 if (p->ewma_rate)
571 RTA_PUT(skb, TCA_POLICE_AVRATE, 4, &p->ewma_rate);
572#endif
573 return skb->len;
574
575rtattr_failure:
576 skb_trim(skb, b - skb->data);
577 return -1;
578}
579
580int tcf_police_dump_stats(struct sk_buff *skb, struct tcf_police *p)
581{
582 struct gnet_dump d;
583
584 if (gnet_stats_start_copy_compat(skb, TCA_STATS2, TCA_STATS,
585 TCA_XSTATS, p->stats_lock, &d) < 0)
586 goto errout;
587
588 if (gnet_stats_copy_basic(&d, &p->bstats) < 0 ||
589#ifdef CONFIG_NET_ESTIMATOR
590 gnet_stats_copy_rate_est(&d, &p->rate_est) < 0 ||
591#endif
592 gnet_stats_copy_queue(&d, &p->qstats) < 0)
593 goto errout;
594
595 if (gnet_stats_finish_copy(&d) < 0)
596 goto errout;
597
598 return 0;
599
600errout:
601 return -1;
602}
603
604#endif /* CONFIG_NET_CLS_ACT */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 10:02:16 -0500