Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
| 43 | static u32 idx_gen; |
| 44 | static struct tcf_police *tcf_police_ht[MY_TAB_SIZE]; |
| 45 | /* Policer hash table lock */ |
| 46 | static DEFINE_RWLOCK(police_lock); |
| 47 | |
| 48 | /* Each policer is serialized by its individual spinlock */ |
| 49 | |
| 50 | static __inline__ unsigned tcf_police_hash(u32 index) |
| 51 | { |
| 52 | return index&0xF; |
| 53 | } |
| 54 | |
| 55 | static __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 |
| 69 | static 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 | } |
| 104 | done: |
| 105 | read_unlock(&police_lock); |
| 106 | if (n_i) |
| 107 | cb->args[0] += n_i; |
| 108 | return n_i; |
| 109 | |
| 110 | rtattr_failure: |
| 111 | skb_trim(skb, (u8*)r - skb->data); |
| 112 | goto done; |
| 113 | } |
| 114 | |
| 115 | static inline int |
| 116 | tcf_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 | |
| 129 | static 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 | |
| 139 | void 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 |
| 164 | static 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; |
| 211 | override: |
| 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 | |
| 272 | failure: |
| 273 | if (ret == ACT_P_CREATED) |
| 274 | kfree(p); |
| 275 | return err; |
| 276 | } |
| 277 | |
| 278 | static 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 | |
Patrick McHardy | f43c5a0 | 2006-01-08 22:15:34 -0800 | [diff] [blame] | 287 | static int tcf_act_police(struct sk_buff *skb, struct tc_action *a, |
Patrick McHardy | abc3bc5 | 2005-08-09 19:25:56 -0700 | [diff] [blame] | 288 | struct tcf_result *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | { |
| 290 | psched_time_t now; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 343 | static int |
| 344 | tcf_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 | |
| 373 | rtattr_failure: |
| 374 | skb_trim(skb, b - skb->data); |
| 375 | return -1; |
| 376 | } |
| 377 | |
| 378 | MODULE_AUTHOR("Alexey Kuznetsov"); |
| 379 | MODULE_DESCRIPTION("Policing actions"); |
| 380 | MODULE_LICENSE("GPL"); |
| 381 | |
| 382 | static 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 | |
| 395 | static int __init |
| 396 | police_init_module(void) |
| 397 | { |
| 398 | return tcf_register_action(&act_police_ops); |
| 399 | } |
| 400 | |
| 401 | static void __exit |
| 402 | police_cleanup_module(void) |
| 403 | { |
| 404 | tcf_unregister_action(&act_police_ops); |
| 405 | } |
| 406 | |
| 407 | module_init(police_init_module); |
| 408 | module_exit(police_cleanup_module); |
| 409 | |
Patrick McHardy | 31bd06e | 2006-01-08 22:16:25 -0800 | [diff] [blame^] | 410 | #else /* CONFIG_NET_CLS_ACT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | struct 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 | |
| 487 | failure: |
| 488 | if (p->R_tab) |
| 489 | qdisc_put_rtab(p->R_tab); |
| 490 | kfree(p); |
| 491 | return NULL; |
| 492 | } |
| 493 | |
| 494 | int 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 | } |
Patrick McHardy | 31bd06e | 2006-01-08 22:16:25 -0800 | [diff] [blame^] | 547 | EXPORT_SYMBOL(tcf_police); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
| 549 | int 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 | |
| 575 | rtattr_failure: |
| 576 | skb_trim(skb, b - skb->data); |
| 577 | return -1; |
| 578 | } |
| 579 | |
| 580 | int 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 | |
| 600 | errout: |
| 601 | return -1; |
| 602 | } |
| 603 | |
Patrick McHardy | 31bd06e | 2006-01-08 22:16:25 -0800 | [diff] [blame^] | 604 | #endif /* CONFIG_NET_CLS_ACT */ |