1/* 2 * net/sched/cls_u32.c Ugly (or Universal) 32bit key Packet Classifier. 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 * 11 * The filters are packed to hash tables of key nodes 12 * with a set of 32bit key/mask pairs at every node. 13 * Nodes reference next level hash tables etc. 14 * 15 * This scheme is the best universal classifier I managed to 16 * invent; it is not super-fast, but it is not slow (provided you 17 * program it correctly), and general enough. And its relative 18 * speed grows as the number of rules becomes larger. 19 * 20 * It seems that it represents the best middle point between 21 * speed and manageability both by human and by machine. 22 * 23 * It is especially useful for link sharing combined with QoS; 24 * pure RSVP doesn't need such a general approach and can use 25 * much simpler (and faster) schemes, sort of cls_rsvp.c. 26 * 27 * JHS: We should remove the CONFIG_NET_CLS_IND from here 28 * eventually when the meta match extension is made available 29 * 30 * nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro> 31 */ 32 33#include <asm/uaccess.h> 34#include <asm/system.h> 35#include <linux/bitops.h> 36#include <linux/module.h> 37#include <linux/types.h> 38#include <linux/kernel.h> 39#include <linux/string.h> 40#include <linux/mm.h> 41#include <linux/socket.h> 42#include <linux/sockios.h> 43#include <linux/in.h> 44#include <linux/errno.h> 45#include <linux/interrupt.h> 46#include <linux/if_ether.h> 47#include <linux/inet.h> 48#include <linux/netdevice.h> 49#include <linux/etherdevice.h> 50#include <linux/notifier.h> 51#include <linux/rtnetlink.h> 52#include <net/ip.h> 53#include <net/netlink.h> 54#include <net/route.h> 55#include <linux/skbuff.h> 56#include <net/sock.h> 57#include <net/act_api.h> 58#include <net/pkt_cls.h> 59 60struct tc_u_knode 61{ 62 struct tc_u_knode *next; 63 u32 handle; 64 struct tc_u_hnode *ht_up; 65 struct tcf_exts exts; 66#ifdef CONFIG_NET_CLS_IND 67 char indev[IFNAMSIZ]; 68#endif 69 u8 fshift; 70 struct tcf_result res; 71 struct tc_u_hnode *ht_down; 72#ifdef CONFIG_CLS_U32_PERF 73 struct tc_u32_pcnt *pf; 74#endif 75#ifdef CONFIG_CLS_U32_MARK 76 struct tc_u32_mark mark; 77#endif 78 struct tc_u32_sel sel; 79}; 80 81struct tc_u_hnode 82{ 83 struct tc_u_hnode *next; 84 u32 handle; 85 u32 prio; 86 struct tc_u_common *tp_c; 87 int refcnt; 88 unsigned divisor; 89 struct tc_u_knode *ht[1]; 90}; 91 92struct tc_u_common 93{ 94 struct tc_u_common *next; 95 struct tc_u_hnode *hlist; 96 struct Qdisc *q; 97 int refcnt; 98 u32 hgenerator; 99}; 100 101static struct tcf_ext_map u32_ext_map = { 102 .action = TCA_U32_ACT, 103 .police = TCA_U32_POLICE 104}; 105 106static struct tc_u_common *u32_list; 107 108static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift) 109{ 110 unsigned h = (key & sel->hmask)>>fshift; 111 112 return h; 113} 114 115static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res) 116{ 117 struct { 118 struct tc_u_knode *knode; 119 u8 *ptr; 120 } stack[TC_U32_MAXDEPTH]; 121 122 struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root; 123 u8 *ptr = skb_network_header(skb); 124 struct tc_u_knode *n; 125 int sdepth = 0; 126 int off2 = 0; 127 int sel = 0; 128#ifdef CONFIG_CLS_U32_PERF 129 int j; 130#endif 131 int i, r; 132 133next_ht: 134 n = ht->ht[sel]; 135 136next_knode: 137 if (n) { 138 struct tc_u32_key *key = n->sel.keys; 139 140#ifdef CONFIG_CLS_U32_PERF 141 n->pf->rcnt +=1; 142 j = 0; 143#endif 144 145#ifdef CONFIG_CLS_U32_MARK 146 if ((skb->mark & n->mark.mask) != n->mark.val) { 147 n = n->next; 148 goto next_knode; 149 } else { 150 n->mark.success++; 151 } 152#endif 153 154 for (i = n->sel.nkeys; i>0; i--, key++) { 155 156 if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) { 157 n = n->next; 158 goto next_knode; 159 } 160#ifdef CONFIG_CLS_U32_PERF 161 n->pf->kcnts[j] +=1; 162 j++; 163#endif 164 } 165 if (n->ht_down == NULL) { 166check_terminal: 167 if (n->sel.flags&TC_U32_TERMINAL) { 168 169 *res = n->res; 170#ifdef CONFIG_NET_CLS_IND 171 if (!tcf_match_indev(skb, n->indev)) { 172 n = n->next; 173 goto next_knode; 174 } 175#endif 176#ifdef CONFIG_CLS_U32_PERF 177 n->pf->rhit +=1; 178#endif 179 r = tcf_exts_exec(skb, &n->exts, res); 180 if (r < 0) { 181 n = n->next; 182 goto next_knode; 183 } 184 185 return r; 186 } 187 n = n->next; 188 goto next_knode; 189 } 190 191 /* PUSH */ 192 if (sdepth >= TC_U32_MAXDEPTH) 193 goto deadloop; 194 stack[sdepth].knode = n; 195 stack[sdepth].ptr = ptr; 196 sdepth++; 197 198 ht = n->ht_down; 199 sel = 0; 200 if (ht->divisor) 201 sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift); 202 203 if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT))) 204 goto next_ht; 205 206 if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) { 207 off2 = n->sel.off + 3; 208 if (n->sel.flags&TC_U32_VAROFFSET) 209 off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift; 210 off2 &= ~3; 211 } 212 if (n->sel.flags&TC_U32_EAT) { 213 ptr += off2; 214 off2 = 0; 215 } 216 217 if (ptr < skb_tail_pointer(skb)) 218 goto next_ht; 219 } 220 221 /* POP */ 222 if (sdepth--) { 223 n = stack[sdepth].knode; 224 ht = n->ht_up; 225 ptr = stack[sdepth].ptr; 226 goto check_terminal; 227 } 228 return -1; 229 230deadloop: 231 if (net_ratelimit()) 232 printk("cls_u32: dead loop\n"); 233 return -1; 234} 235 236static __inline__ struct tc_u_hnode * 237u32_lookup_ht(struct tc_u_common *tp_c, u32 handle) 238{ 239 struct tc_u_hnode *ht; 240 241 for (ht = tp_c->hlist; ht; ht = ht->next) 242 if (ht->handle == handle) 243 break; 244 245 return ht; 246} 247 248static __inline__ struct tc_u_knode * 249u32_lookup_key(struct tc_u_hnode *ht, u32 handle) 250{ 251 unsigned sel; 252 struct tc_u_knode *n = NULL; 253 254 sel = TC_U32_HASH(handle); 255 if (sel > ht->divisor) 256 goto out; 257 258 for (n = ht->ht[sel]; n; n = n->next) 259 if (n->handle == handle) 260 break; 261out: 262 return n; 263} 264 265 266static unsigned long u32_get(struct tcf_proto *tp, u32 handle) 267{ 268 struct tc_u_hnode *ht; 269 struct tc_u_common *tp_c = tp->data; 270 271 if (TC_U32_HTID(handle) == TC_U32_ROOT) 272 ht = tp->root; 273 else 274 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle)); 275 276 if (!ht) 277 return 0; 278 279 if (TC_U32_KEY(handle) == 0) 280 return (unsigned long)ht; 281 282 return (unsigned long)u32_lookup_key(ht, handle); 283} 284 285static void u32_put(struct tcf_proto *tp, unsigned long f) 286{ 287} 288 289static u32 gen_new_htid(struct tc_u_common *tp_c) 290{ 291 int i = 0x800; 292 293 do { 294 if (++tp_c->hgenerator == 0x7FF) 295 tp_c->hgenerator = 1; 296 } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20)); 297 298 return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0; 299} 300 301static int u32_init(struct tcf_proto *tp) 302{ 303 struct tc_u_hnode *root_ht; 304 struct tc_u_common *tp_c; 305 306 for (tp_c = u32_list; tp_c; tp_c = tp_c->next) 307 if (tp_c->q == tp->q) 308 break; 309 310 root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL); 311 if (root_ht == NULL) 312 return -ENOBUFS; 313 314 root_ht->divisor = 0; 315 root_ht->refcnt++; 316 root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000; 317 root_ht->prio = tp->prio; 318 319 if (tp_c == NULL) { 320 tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL); 321 if (tp_c == NULL) { 322 kfree(root_ht); 323 return -ENOBUFS; 324 } 325 tp_c->q = tp->q; 326 tp_c->next = u32_list; 327 u32_list = tp_c; 328 } 329 330 tp_c->refcnt++; 331 root_ht->next = tp_c->hlist; 332 tp_c->hlist = root_ht; 333 root_ht->tp_c = tp_c; 334 335 tp->root = root_ht; 336 tp->data = tp_c; 337 return 0; 338} 339 340static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n) 341{ 342 tcf_unbind_filter(tp, &n->res); 343 tcf_exts_destroy(tp, &n->exts); 344 if (n->ht_down) 345 n->ht_down->refcnt--; 346#ifdef CONFIG_CLS_U32_PERF 347 kfree(n->pf); 348#endif 349 kfree(n); 350 return 0; 351} 352 353static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key) 354{ 355 struct tc_u_knode **kp; 356 struct tc_u_hnode *ht = key->ht_up; 357 358 if (ht) { 359 for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) { 360 if (*kp == key) { 361 tcf_tree_lock(tp); 362 *kp = key->next; 363 tcf_tree_unlock(tp); 364 365 u32_destroy_key(tp, key); 366 return 0; 367 } 368 } 369 } 370 BUG_TRAP(0); 371 return 0; 372} 373 374static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) 375{ 376 struct tc_u_knode *n; 377 unsigned h; 378 379 for (h=0; h<=ht->divisor; h++) { 380 while ((n = ht->ht[h]) != NULL) { 381 ht->ht[h] = n->next; 382 383 u32_destroy_key(tp, n); 384 } 385 } 386} 387 388static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) 389{ 390 struct tc_u_common *tp_c = tp->data; 391 struct tc_u_hnode **hn; 392 393 BUG_TRAP(!ht->refcnt); 394 395 u32_clear_hnode(tp, ht); 396 397 for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) { 398 if (*hn == ht) { 399 *hn = ht->next; 400 kfree(ht); 401 return 0; 402 } 403 } 404 405 BUG_TRAP(0); 406 return -ENOENT; 407} 408 409static void u32_destroy(struct tcf_proto *tp) 410{ 411 struct tc_u_common *tp_c = tp->data; 412 struct tc_u_hnode *root_ht = xchg(&tp->root, NULL); 413 414 BUG_TRAP(root_ht != NULL); 415 416 if (root_ht && --root_ht->refcnt == 0) 417 u32_destroy_hnode(tp, root_ht); 418 419 if (--tp_c->refcnt == 0) { 420 struct tc_u_hnode *ht; 421 struct tc_u_common **tp_cp; 422 423 for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) { 424 if (*tp_cp == tp_c) { 425 *tp_cp = tp_c->next; 426 break; 427 } 428 } 429 430 for (ht=tp_c->hlist; ht; ht = ht->next) 431 u32_clear_hnode(tp, ht); 432 433 while ((ht = tp_c->hlist) != NULL) { 434 tp_c->hlist = ht->next; 435 436 BUG_TRAP(ht->refcnt == 0); 437 438 kfree(ht); 439 } 440 441 kfree(tp_c); 442 } 443 444 tp->data = NULL; 445} 446 447static int u32_delete(struct tcf_proto *tp, unsigned long arg) 448{ 449 struct tc_u_hnode *ht = (struct tc_u_hnode*)arg; 450 451 if (ht == NULL) 452 return 0; 453 454 if (TC_U32_KEY(ht->handle)) 455 return u32_delete_key(tp, (struct tc_u_knode*)ht); 456 457 if (tp->root == ht) 458 return -EINVAL; 459 460 if (--ht->refcnt == 0) 461 u32_destroy_hnode(tp, ht); 462 463 return 0; 464} 465 466static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle) 467{ 468 struct tc_u_knode *n; 469 unsigned i = 0x7FF; 470 471 for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next) 472 if (i < TC_U32_NODE(n->handle)) 473 i = TC_U32_NODE(n->handle); 474 i++; 475 476 return handle|(i>0xFFF ? 0xFFF : i); 477} 478 479static int u32_set_parms(struct tcf_proto *tp, unsigned long base, 480 struct tc_u_hnode *ht, 481 struct tc_u_knode *n, struct rtattr **tb, 482 struct rtattr *est) 483{ 484 int err; 485 struct tcf_exts e; 486 487 err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map); 488 if (err < 0) 489 return err; 490 491 err = -EINVAL; 492 if (tb[TCA_U32_LINK-1]) { 493 u32 handle = *(u32*)RTA_DATA(tb[TCA_U32_LINK-1]); 494 struct tc_u_hnode *ht_down = NULL; 495 496 if (TC_U32_KEY(handle)) 497 goto errout; 498 499 if (handle) { 500 ht_down = u32_lookup_ht(ht->tp_c, handle); 501 502 if (ht_down == NULL) 503 goto errout; 504 ht_down->refcnt++; 505 } 506 507 tcf_tree_lock(tp); 508 ht_down = xchg(&n->ht_down, ht_down); 509 tcf_tree_unlock(tp); 510 511 if (ht_down) 512 ht_down->refcnt--; 513 } 514 if (tb[TCA_U32_CLASSID-1]) { 515 n->res.classid = *(u32*)RTA_DATA(tb[TCA_U32_CLASSID-1]); 516 tcf_bind_filter(tp, &n->res, base); 517 } 518 519#ifdef CONFIG_NET_CLS_IND 520 if (tb[TCA_U32_INDEV-1]) { 521 int err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV-1]); 522 if (err < 0) 523 goto errout; 524 } 525#endif 526 tcf_exts_change(tp, &n->exts, &e); 527 528 return 0; 529errout: 530 tcf_exts_destroy(tp, &e); 531 return err; 532} 533 534static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle, 535 struct rtattr **tca, 536 unsigned long *arg) 537{ 538 struct tc_u_common *tp_c = tp->data; 539 struct tc_u_hnode *ht; 540 struct tc_u_knode *n; 541 struct tc_u32_sel *s; 542 struct rtattr *opt = tca[TCA_OPTIONS-1]; 543 struct rtattr *tb[TCA_U32_MAX]; 544 u32 htid; 545 int err; 546 547 if (opt == NULL) 548 return handle ? -EINVAL : 0; 549 550 if (rtattr_parse_nested(tb, TCA_U32_MAX, opt) < 0) 551 return -EINVAL; 552 553 if ((n = (struct tc_u_knode*)*arg) != NULL) { 554 if (TC_U32_KEY(n->handle) == 0) 555 return -EINVAL; 556 557 return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE-1]); 558 } 559 560 if (tb[TCA_U32_DIVISOR-1]) { 561 unsigned divisor = *(unsigned*)RTA_DATA(tb[TCA_U32_DIVISOR-1]); 562 563 if (--divisor > 0x100) 564 return -EINVAL; 565 if (TC_U32_KEY(handle)) 566 return -EINVAL; 567 if (handle == 0) { 568 handle = gen_new_htid(tp->data); 569 if (handle == 0) 570 return -ENOMEM; 571 } 572 ht = kzalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL); 573 if (ht == NULL) 574 return -ENOBUFS; 575 ht->tp_c = tp_c; 576 ht->refcnt = 0; 577 ht->divisor = divisor; 578 ht->handle = handle; 579 ht->prio = tp->prio; 580 ht->next = tp_c->hlist; 581 tp_c->hlist = ht; 582 *arg = (unsigned long)ht; 583 return 0; 584 } 585 586 if (tb[TCA_U32_HASH-1]) { 587 htid = *(unsigned*)RTA_DATA(tb[TCA_U32_HASH-1]); 588 if (TC_U32_HTID(htid) == TC_U32_ROOT) { 589 ht = tp->root; 590 htid = ht->handle; 591 } else { 592 ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid)); 593 if (ht == NULL) 594 return -EINVAL; 595 } 596 } else { 597 ht = tp->root; 598 htid = ht->handle; 599 } 600 601 if (ht->divisor < TC_U32_HASH(htid)) 602 return -EINVAL; 603 604 if (handle) { 605 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid)) 606 return -EINVAL; 607 handle = htid | TC_U32_NODE(handle); 608 } else 609 handle = gen_new_kid(ht, htid); 610 611 if (tb[TCA_U32_SEL-1] == 0 || 612 RTA_PAYLOAD(tb[TCA_U32_SEL-1]) < sizeof(struct tc_u32_sel)) 613 return -EINVAL; 614 615 s = RTA_DATA(tb[TCA_U32_SEL-1]); 616 617 n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL); 618 if (n == NULL) 619 return -ENOBUFS; 620 621#ifdef CONFIG_CLS_U32_PERF 622 n->pf = kzalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL); 623 if (n->pf == NULL) { 624 kfree(n); 625 return -ENOBUFS; 626 } 627#endif 628 629 memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); 630 n->ht_up = ht; 631 n->handle = handle; 632{ 633 u8 i = 0; 634 u32 mask = s->hmask; 635 if (mask) { 636 while (!(mask & 1)) { 637 i++; 638 mask>>=1; 639 } 640 } 641 n->fshift = i; 642} 643 644#ifdef CONFIG_CLS_U32_MARK 645 if (tb[TCA_U32_MARK-1]) { 646 struct tc_u32_mark *mark; 647 648 if (RTA_PAYLOAD(tb[TCA_U32_MARK-1]) < sizeof(struct tc_u32_mark)) { 649#ifdef CONFIG_CLS_U32_PERF 650 kfree(n->pf); 651#endif 652 kfree(n); 653 return -EINVAL; 654 } 655 mark = RTA_DATA(tb[TCA_U32_MARK-1]); 656 memcpy(&n->mark, mark, sizeof(struct tc_u32_mark)); 657 n->mark.success = 0; 658 } 659#endif 660 661 err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE-1]); 662 if (err == 0) { 663 struct tc_u_knode **ins; 664 for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next) 665 if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle)) 666 break; 667 668 n->next = *ins; 669 wmb(); 670 *ins = n; 671 672 *arg = (unsigned long)n; 673 return 0; 674 } 675#ifdef CONFIG_CLS_U32_PERF 676 kfree(n->pf); 677#endif 678 kfree(n); 679 return err; 680} 681 682static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg) 683{ 684 struct tc_u_common *tp_c = tp->data; 685 struct tc_u_hnode *ht; 686 struct tc_u_knode *n; 687 unsigned h; 688 689 if (arg->stop) 690 return; 691 692 for (ht = tp_c->hlist; ht; ht = ht->next) { 693 if (ht->prio != tp->prio) 694 continue; 695 if (arg->count >= arg->skip) { 696 if (arg->fn(tp, (unsigned long)ht, arg) < 0) { 697 arg->stop = 1; 698 return; 699 } 700 } 701 arg->count++; 702 for (h = 0; h <= ht->divisor; h++) { 703 for (n = ht->ht[h]; n; n = n->next) { 704 if (arg->count < arg->skip) { 705 arg->count++; 706 continue; 707 } 708 if (arg->fn(tp, (unsigned long)n, arg) < 0) { 709 arg->stop = 1; 710 return; 711 } 712 arg->count++; 713 } 714 } 715 } 716} 717 718static int u32_dump(struct tcf_proto *tp, unsigned long fh, 719 struct sk_buff *skb, struct tcmsg *t) 720{ 721 struct tc_u_knode *n = (struct tc_u_knode*)fh; 722 unsigned char *b = skb_tail_pointer(skb); 723 struct rtattr *rta; 724 725 if (n == NULL) 726 return skb->len; 727 728 t->tcm_handle = n->handle; 729 730 rta = (struct rtattr*)b; 731 RTA_PUT(skb, TCA_OPTIONS, 0, NULL); 732 733 if (TC_U32_KEY(n->handle) == 0) { 734 struct tc_u_hnode *ht = (struct tc_u_hnode*)fh; 735 u32 divisor = ht->divisor+1; 736 RTA_PUT(skb, TCA_U32_DIVISOR, 4, &divisor); 737 } else { 738 RTA_PUT(skb, TCA_U32_SEL, 739 sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key), 740 &n->sel); 741 if (n->ht_up) { 742 u32 htid = n->handle & 0xFFFFF000; 743 RTA_PUT(skb, TCA_U32_HASH, 4, &htid); 744 } 745 if (n->res.classid) 746 RTA_PUT(skb, TCA_U32_CLASSID, 4, &n->res.classid); 747 if (n->ht_down) 748 RTA_PUT(skb, TCA_U32_LINK, 4, &n->ht_down->handle); 749 750#ifdef CONFIG_CLS_U32_MARK 751 if (n->mark.val || n->mark.mask) 752 RTA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark); 753#endif 754 755 if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0) 756 goto rtattr_failure; 757 758#ifdef CONFIG_NET_CLS_IND 759 if(strlen(n->indev)) 760 RTA_PUT(skb, TCA_U32_INDEV, IFNAMSIZ, n->indev); 761#endif 762#ifdef CONFIG_CLS_U32_PERF 763 RTA_PUT(skb, TCA_U32_PCNT, 764 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64), 765 n->pf); 766#endif 767 } 768 769 rta->rta_len = skb_tail_pointer(skb) - b; 770 if (TC_U32_KEY(n->handle)) 771 if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0) 772 goto rtattr_failure; 773 return skb->len; 774 775rtattr_failure: 776 nlmsg_trim(skb, b); 777 return -1; 778} 779 780static struct tcf_proto_ops cls_u32_ops = { 781 .next = NULL, 782 .kind = "u32", 783 .classify = u32_classify, 784 .init = u32_init, 785 .destroy = u32_destroy, 786 .get = u32_get, 787 .put = u32_put, 788 .change = u32_change, 789 .delete = u32_delete, 790 .walk = u32_walk, 791 .dump = u32_dump, 792 .owner = THIS_MODULE, 793}; 794 795static int __init init_u32(void) 796{ 797 printk("u32 classifier\n"); 798#ifdef CONFIG_CLS_U32_PERF 799 printk(" Performance counters on\n"); 800#endif 801#ifdef CONFIG_NET_CLS_POLICE 802 printk(" OLD policer on \n"); 803#endif 804#ifdef CONFIG_NET_CLS_IND 805 printk(" input device check on \n"); 806#endif 807#ifdef CONFIG_NET_CLS_ACT 808 printk(" Actions configured \n"); 809#endif 810 return register_tcf_proto_ops(&cls_u32_ops); 811} 812 813static void __exit exit_u32(void) 814{ 815 unregister_tcf_proto_ops(&cls_u32_ops); 816} 817 818module_init(init_u32) 819module_exit(exit_u32) 820MODULE_LICENSE("GPL"); 821