Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/module.h> |
| 34 | #include <linux/types.h> |
| 35 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <linux/rtnetlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/skbuff.h> |
Patrick McHardy | 0ba4805 | 2007-07-02 22:49:07 -0700 | [diff] [blame] | 40 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <net/act_api.h> |
| 42 | #include <net/pkt_cls.h> |
| 43 | |
| 44 | struct tc_u_knode |
| 45 | { |
| 46 | struct tc_u_knode *next; |
| 47 | u32 handle; |
| 48 | struct tc_u_hnode *ht_up; |
| 49 | struct tcf_exts exts; |
| 50 | #ifdef CONFIG_NET_CLS_IND |
| 51 | char indev[IFNAMSIZ]; |
| 52 | #endif |
| 53 | u8 fshift; |
| 54 | struct tcf_result res; |
| 55 | struct tc_u_hnode *ht_down; |
| 56 | #ifdef CONFIG_CLS_U32_PERF |
| 57 | struct tc_u32_pcnt *pf; |
| 58 | #endif |
| 59 | #ifdef CONFIG_CLS_U32_MARK |
| 60 | struct tc_u32_mark mark; |
| 61 | #endif |
| 62 | struct tc_u32_sel sel; |
| 63 | }; |
| 64 | |
| 65 | struct tc_u_hnode |
| 66 | { |
| 67 | struct tc_u_hnode *next; |
| 68 | u32 handle; |
| 69 | u32 prio; |
| 70 | struct tc_u_common *tp_c; |
| 71 | int refcnt; |
| 72 | unsigned divisor; |
| 73 | struct tc_u_knode *ht[1]; |
| 74 | }; |
| 75 | |
| 76 | struct tc_u_common |
| 77 | { |
| 78 | struct tc_u_common *next; |
| 79 | struct tc_u_hnode *hlist; |
| 80 | struct Qdisc *q; |
| 81 | int refcnt; |
| 82 | u32 hgenerator; |
| 83 | }; |
| 84 | |
| 85 | static struct tcf_ext_map u32_ext_map = { |
| 86 | .action = TCA_U32_ACT, |
| 87 | .police = TCA_U32_POLICE |
| 88 | }; |
| 89 | |
| 90 | static struct tc_u_common *u32_list; |
| 91 | |
| 92 | static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift) |
| 93 | { |
Radu Rendec | 543821c | 2007-11-07 01:20:12 -0800 | [diff] [blame] | 94 | unsigned h = ntohl(key & sel->hmask)>>fshift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | return h; |
| 97 | } |
| 98 | |
| 99 | static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res) |
| 100 | { |
| 101 | struct { |
| 102 | struct tc_u_knode *knode; |
| 103 | u8 *ptr; |
| 104 | } stack[TC_U32_MAXDEPTH]; |
| 105 | |
| 106 | struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 107 | u8 *ptr = skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | struct tc_u_knode *n; |
| 109 | int sdepth = 0; |
| 110 | int off2 = 0; |
| 111 | int sel = 0; |
| 112 | #ifdef CONFIG_CLS_U32_PERF |
| 113 | int j; |
| 114 | #endif |
| 115 | int i, r; |
| 116 | |
| 117 | next_ht: |
| 118 | n = ht->ht[sel]; |
| 119 | |
| 120 | next_knode: |
| 121 | if (n) { |
| 122 | struct tc_u32_key *key = n->sel.keys; |
| 123 | |
| 124 | #ifdef CONFIG_CLS_U32_PERF |
| 125 | n->pf->rcnt +=1; |
| 126 | j = 0; |
| 127 | #endif |
| 128 | |
| 129 | #ifdef CONFIG_CLS_U32_MARK |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 130 | if ((skb->mark & n->mark.mask) != n->mark.val) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | n = n->next; |
| 132 | goto next_knode; |
| 133 | } else { |
| 134 | n->mark.success++; |
| 135 | } |
| 136 | #endif |
| 137 | |
| 138 | for (i = n->sel.nkeys; i>0; i--, key++) { |
| 139 | |
| 140 | if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) { |
| 141 | n = n->next; |
| 142 | goto next_knode; |
| 143 | } |
| 144 | #ifdef CONFIG_CLS_U32_PERF |
| 145 | n->pf->kcnts[j] +=1; |
| 146 | j++; |
| 147 | #endif |
| 148 | } |
| 149 | if (n->ht_down == NULL) { |
| 150 | check_terminal: |
| 151 | if (n->sel.flags&TC_U32_TERMINAL) { |
| 152 | |
| 153 | *res = n->res; |
| 154 | #ifdef CONFIG_NET_CLS_IND |
| 155 | if (!tcf_match_indev(skb, n->indev)) { |
| 156 | n = n->next; |
| 157 | goto next_knode; |
| 158 | } |
| 159 | #endif |
| 160 | #ifdef CONFIG_CLS_U32_PERF |
| 161 | n->pf->rhit +=1; |
| 162 | #endif |
| 163 | r = tcf_exts_exec(skb, &n->exts, res); |
| 164 | if (r < 0) { |
| 165 | n = n->next; |
| 166 | goto next_knode; |
| 167 | } |
| 168 | |
| 169 | return r; |
| 170 | } |
| 171 | n = n->next; |
| 172 | goto next_knode; |
| 173 | } |
| 174 | |
| 175 | /* PUSH */ |
| 176 | if (sdepth >= TC_U32_MAXDEPTH) |
| 177 | goto deadloop; |
| 178 | stack[sdepth].knode = n; |
| 179 | stack[sdepth].ptr = ptr; |
| 180 | sdepth++; |
| 181 | |
| 182 | ht = n->ht_down; |
| 183 | sel = 0; |
| 184 | if (ht->divisor) |
| 185 | sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift); |
| 186 | |
| 187 | if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT))) |
| 188 | goto next_ht; |
| 189 | |
| 190 | if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) { |
| 191 | off2 = n->sel.off + 3; |
| 192 | if (n->sel.flags&TC_U32_VAROFFSET) |
| 193 | off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift; |
| 194 | off2 &= ~3; |
| 195 | } |
| 196 | if (n->sel.flags&TC_U32_EAT) { |
| 197 | ptr += off2; |
| 198 | off2 = 0; |
| 199 | } |
| 200 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 201 | if (ptr < skb_tail_pointer(skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | goto next_ht; |
| 203 | } |
| 204 | |
| 205 | /* POP */ |
| 206 | if (sdepth--) { |
| 207 | n = stack[sdepth].knode; |
| 208 | ht = n->ht_up; |
| 209 | ptr = stack[sdepth].ptr; |
| 210 | goto check_terminal; |
| 211 | } |
| 212 | return -1; |
| 213 | |
| 214 | deadloop: |
| 215 | if (net_ratelimit()) |
| 216 | printk("cls_u32: dead loop\n"); |
| 217 | return -1; |
| 218 | } |
| 219 | |
| 220 | static __inline__ struct tc_u_hnode * |
| 221 | u32_lookup_ht(struct tc_u_common *tp_c, u32 handle) |
| 222 | { |
| 223 | struct tc_u_hnode *ht; |
| 224 | |
| 225 | for (ht = tp_c->hlist; ht; ht = ht->next) |
| 226 | if (ht->handle == handle) |
| 227 | break; |
| 228 | |
| 229 | return ht; |
| 230 | } |
| 231 | |
| 232 | static __inline__ struct tc_u_knode * |
| 233 | u32_lookup_key(struct tc_u_hnode *ht, u32 handle) |
| 234 | { |
| 235 | unsigned sel; |
| 236 | struct tc_u_knode *n = NULL; |
| 237 | |
| 238 | sel = TC_U32_HASH(handle); |
| 239 | if (sel > ht->divisor) |
| 240 | goto out; |
| 241 | |
| 242 | for (n = ht->ht[sel]; n; n = n->next) |
| 243 | if (n->handle == handle) |
| 244 | break; |
| 245 | out: |
| 246 | return n; |
| 247 | } |
| 248 | |
| 249 | |
| 250 | static unsigned long u32_get(struct tcf_proto *tp, u32 handle) |
| 251 | { |
| 252 | struct tc_u_hnode *ht; |
| 253 | struct tc_u_common *tp_c = tp->data; |
| 254 | |
| 255 | if (TC_U32_HTID(handle) == TC_U32_ROOT) |
| 256 | ht = tp->root; |
| 257 | else |
| 258 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle)); |
| 259 | |
| 260 | if (!ht) |
| 261 | return 0; |
| 262 | |
| 263 | if (TC_U32_KEY(handle) == 0) |
| 264 | return (unsigned long)ht; |
| 265 | |
| 266 | return (unsigned long)u32_lookup_key(ht, handle); |
| 267 | } |
| 268 | |
| 269 | static void u32_put(struct tcf_proto *tp, unsigned long f) |
| 270 | { |
| 271 | } |
| 272 | |
| 273 | static u32 gen_new_htid(struct tc_u_common *tp_c) |
| 274 | { |
| 275 | int i = 0x800; |
| 276 | |
| 277 | do { |
| 278 | if (++tp_c->hgenerator == 0x7FF) |
| 279 | tp_c->hgenerator = 1; |
| 280 | } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20)); |
| 281 | |
| 282 | return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0; |
| 283 | } |
| 284 | |
| 285 | static int u32_init(struct tcf_proto *tp) |
| 286 | { |
| 287 | struct tc_u_hnode *root_ht; |
| 288 | struct tc_u_common *tp_c; |
| 289 | |
| 290 | for (tp_c = u32_list; tp_c; tp_c = tp_c->next) |
| 291 | if (tp_c->q == tp->q) |
| 292 | break; |
| 293 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 294 | root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | if (root_ht == NULL) |
| 296 | return -ENOBUFS; |
| 297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | root_ht->divisor = 0; |
| 299 | root_ht->refcnt++; |
| 300 | root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000; |
| 301 | root_ht->prio = tp->prio; |
| 302 | |
| 303 | if (tp_c == NULL) { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 304 | tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | if (tp_c == NULL) { |
| 306 | kfree(root_ht); |
| 307 | return -ENOBUFS; |
| 308 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | tp_c->q = tp->q; |
| 310 | tp_c->next = u32_list; |
| 311 | u32_list = tp_c; |
| 312 | } |
| 313 | |
| 314 | tp_c->refcnt++; |
| 315 | root_ht->next = tp_c->hlist; |
| 316 | tp_c->hlist = root_ht; |
| 317 | root_ht->tp_c = tp_c; |
| 318 | |
| 319 | tp->root = root_ht; |
| 320 | tp->data = tp_c; |
| 321 | return 0; |
| 322 | } |
| 323 | |
| 324 | static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n) |
| 325 | { |
| 326 | tcf_unbind_filter(tp, &n->res); |
| 327 | tcf_exts_destroy(tp, &n->exts); |
| 328 | if (n->ht_down) |
| 329 | n->ht_down->refcnt--; |
| 330 | #ifdef CONFIG_CLS_U32_PERF |
Patrick McHardy | 1ae39a4 | 2006-03-23 01:16:48 -0800 | [diff] [blame] | 331 | kfree(n->pf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | #endif |
| 333 | kfree(n); |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key) |
| 338 | { |
| 339 | struct tc_u_knode **kp; |
| 340 | struct tc_u_hnode *ht = key->ht_up; |
| 341 | |
| 342 | if (ht) { |
| 343 | for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) { |
| 344 | if (*kp == key) { |
| 345 | tcf_tree_lock(tp); |
| 346 | *kp = key->next; |
| 347 | tcf_tree_unlock(tp); |
| 348 | |
| 349 | u32_destroy_key(tp, key); |
| 350 | return 0; |
| 351 | } |
| 352 | } |
| 353 | } |
| 354 | BUG_TRAP(0); |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) |
| 359 | { |
| 360 | struct tc_u_knode *n; |
| 361 | unsigned h; |
| 362 | |
| 363 | for (h=0; h<=ht->divisor; h++) { |
| 364 | while ((n = ht->ht[h]) != NULL) { |
| 365 | ht->ht[h] = n->next; |
| 366 | |
| 367 | u32_destroy_key(tp, n); |
| 368 | } |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) |
| 373 | { |
| 374 | struct tc_u_common *tp_c = tp->data; |
| 375 | struct tc_u_hnode **hn; |
| 376 | |
| 377 | BUG_TRAP(!ht->refcnt); |
| 378 | |
| 379 | u32_clear_hnode(tp, ht); |
| 380 | |
| 381 | for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) { |
| 382 | if (*hn == ht) { |
| 383 | *hn = ht->next; |
| 384 | kfree(ht); |
| 385 | return 0; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | BUG_TRAP(0); |
| 390 | return -ENOENT; |
| 391 | } |
| 392 | |
| 393 | static void u32_destroy(struct tcf_proto *tp) |
| 394 | { |
| 395 | struct tc_u_common *tp_c = tp->data; |
| 396 | struct tc_u_hnode *root_ht = xchg(&tp->root, NULL); |
| 397 | |
| 398 | BUG_TRAP(root_ht != NULL); |
| 399 | |
| 400 | if (root_ht && --root_ht->refcnt == 0) |
| 401 | u32_destroy_hnode(tp, root_ht); |
| 402 | |
| 403 | if (--tp_c->refcnt == 0) { |
| 404 | struct tc_u_hnode *ht; |
| 405 | struct tc_u_common **tp_cp; |
| 406 | |
| 407 | for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) { |
| 408 | if (*tp_cp == tp_c) { |
| 409 | *tp_cp = tp_c->next; |
| 410 | break; |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | for (ht=tp_c->hlist; ht; ht = ht->next) |
| 415 | u32_clear_hnode(tp, ht); |
| 416 | |
| 417 | while ((ht = tp_c->hlist) != NULL) { |
| 418 | tp_c->hlist = ht->next; |
| 419 | |
| 420 | BUG_TRAP(ht->refcnt == 0); |
| 421 | |
| 422 | kfree(ht); |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 423 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
| 425 | kfree(tp_c); |
| 426 | } |
| 427 | |
| 428 | tp->data = NULL; |
| 429 | } |
| 430 | |
| 431 | static int u32_delete(struct tcf_proto *tp, unsigned long arg) |
| 432 | { |
| 433 | struct tc_u_hnode *ht = (struct tc_u_hnode*)arg; |
| 434 | |
| 435 | if (ht == NULL) |
| 436 | return 0; |
| 437 | |
| 438 | if (TC_U32_KEY(ht->handle)) |
| 439 | return u32_delete_key(tp, (struct tc_u_knode*)ht); |
| 440 | |
| 441 | if (tp->root == ht) |
| 442 | return -EINVAL; |
| 443 | |
| 444 | if (--ht->refcnt == 0) |
| 445 | u32_destroy_hnode(tp, ht); |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle) |
| 451 | { |
| 452 | struct tc_u_knode *n; |
| 453 | unsigned i = 0x7FF; |
| 454 | |
| 455 | for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next) |
| 456 | if (i < TC_U32_NODE(n->handle)) |
| 457 | i = TC_U32_NODE(n->handle); |
| 458 | i++; |
| 459 | |
| 460 | return handle|(i>0xFFF ? 0xFFF : i); |
| 461 | } |
| 462 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 463 | static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = { |
| 464 | [TCA_U32_CLASSID] = { .type = NLA_U32 }, |
| 465 | [TCA_U32_HASH] = { .type = NLA_U32 }, |
| 466 | [TCA_U32_LINK] = { .type = NLA_U32 }, |
| 467 | [TCA_U32_DIVISOR] = { .type = NLA_U32 }, |
| 468 | [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) }, |
| 469 | [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ }, |
| 470 | [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) }, |
| 471 | }; |
| 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | static int u32_set_parms(struct tcf_proto *tp, unsigned long base, |
| 474 | struct tc_u_hnode *ht, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 475 | struct tc_u_knode *n, struct nlattr **tb, |
| 476 | struct nlattr *est) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | { |
| 478 | int err; |
| 479 | struct tcf_exts e; |
| 480 | |
| 481 | err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map); |
| 482 | if (err < 0) |
| 483 | return err; |
| 484 | |
| 485 | err = -EINVAL; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 486 | if (tb[TCA_U32_LINK]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 487 | u32 handle = nla_get_u32(tb[TCA_U32_LINK]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | struct tc_u_hnode *ht_down = NULL; |
| 489 | |
| 490 | if (TC_U32_KEY(handle)) |
| 491 | goto errout; |
| 492 | |
| 493 | if (handle) { |
| 494 | ht_down = u32_lookup_ht(ht->tp_c, handle); |
| 495 | |
| 496 | if (ht_down == NULL) |
| 497 | goto errout; |
| 498 | ht_down->refcnt++; |
| 499 | } |
| 500 | |
| 501 | tcf_tree_lock(tp); |
| 502 | ht_down = xchg(&n->ht_down, ht_down); |
| 503 | tcf_tree_unlock(tp); |
| 504 | |
| 505 | if (ht_down) |
| 506 | ht_down->refcnt--; |
| 507 | } |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 508 | if (tb[TCA_U32_CLASSID]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 509 | n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | tcf_bind_filter(tp, &n->res, base); |
| 511 | } |
| 512 | |
| 513 | #ifdef CONFIG_NET_CLS_IND |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 514 | if (tb[TCA_U32_INDEV]) { |
| 515 | err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | if (err < 0) |
| 517 | goto errout; |
| 518 | } |
| 519 | #endif |
| 520 | tcf_exts_change(tp, &n->exts, &e); |
| 521 | |
| 522 | return 0; |
| 523 | errout: |
| 524 | tcf_exts_destroy(tp, &e); |
| 525 | return err; |
| 526 | } |
| 527 | |
| 528 | static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 529 | struct nlattr **tca, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | unsigned long *arg) |
| 531 | { |
| 532 | struct tc_u_common *tp_c = tp->data; |
| 533 | struct tc_u_hnode *ht; |
| 534 | struct tc_u_knode *n; |
| 535 | struct tc_u32_sel *s; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 536 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 537 | struct nlattr *tb[TCA_U32_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | u32 htid; |
| 539 | int err; |
| 540 | |
| 541 | if (opt == NULL) |
| 542 | return handle ? -EINVAL : 0; |
| 543 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 544 | err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 545 | if (err < 0) |
| 546 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | if ((n = (struct tc_u_knode*)*arg) != NULL) { |
| 549 | if (TC_U32_KEY(n->handle) == 0) |
| 550 | return -EINVAL; |
| 551 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 552 | return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } |
| 554 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 555 | if (tb[TCA_U32_DIVISOR]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 556 | unsigned divisor = nla_get_u32(tb[TCA_U32_DIVISOR]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
| 558 | if (--divisor > 0x100) |
| 559 | return -EINVAL; |
| 560 | if (TC_U32_KEY(handle)) |
| 561 | return -EINVAL; |
| 562 | if (handle == 0) { |
| 563 | handle = gen_new_htid(tp->data); |
| 564 | if (handle == 0) |
| 565 | return -ENOMEM; |
| 566 | } |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 567 | ht = kzalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | if (ht == NULL) |
| 569 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | ht->tp_c = tp_c; |
| 571 | ht->refcnt = 0; |
| 572 | ht->divisor = divisor; |
| 573 | ht->handle = handle; |
| 574 | ht->prio = tp->prio; |
| 575 | ht->next = tp_c->hlist; |
| 576 | tp_c->hlist = ht; |
| 577 | *arg = (unsigned long)ht; |
| 578 | return 0; |
| 579 | } |
| 580 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 581 | if (tb[TCA_U32_HASH]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 582 | htid = nla_get_u32(tb[TCA_U32_HASH]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | if (TC_U32_HTID(htid) == TC_U32_ROOT) { |
| 584 | ht = tp->root; |
| 585 | htid = ht->handle; |
| 586 | } else { |
| 587 | ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid)); |
| 588 | if (ht == NULL) |
| 589 | return -EINVAL; |
| 590 | } |
| 591 | } else { |
| 592 | ht = tp->root; |
| 593 | htid = ht->handle; |
| 594 | } |
| 595 | |
| 596 | if (ht->divisor < TC_U32_HASH(htid)) |
| 597 | return -EINVAL; |
| 598 | |
| 599 | if (handle) { |
| 600 | if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid)) |
| 601 | return -EINVAL; |
| 602 | handle = htid | TC_U32_NODE(handle); |
| 603 | } else |
| 604 | handle = gen_new_kid(ht, htid); |
| 605 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 606 | if (tb[TCA_U32_SEL] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | return -EINVAL; |
| 608 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 609 | s = nla_data(tb[TCA_U32_SEL]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 611 | n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | if (n == NULL) |
| 613 | return -ENOBUFS; |
| 614 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | #ifdef CONFIG_CLS_U32_PERF |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 616 | n->pf = kzalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | if (n->pf == NULL) { |
| 618 | kfree(n); |
| 619 | return -ENOBUFS; |
| 620 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | #endif |
| 622 | |
| 623 | memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); |
| 624 | n->ht_up = ht; |
| 625 | n->handle = handle; |
Radu Rendec | b226801 | 2007-11-10 21:54:50 -0800 | [diff] [blame] | 626 | n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
| 628 | #ifdef CONFIG_CLS_U32_MARK |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 629 | if (tb[TCA_U32_MARK]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | struct tc_u32_mark *mark; |
| 631 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 632 | mark = nla_data(tb[TCA_U32_MARK]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | memcpy(&n->mark, mark, sizeof(struct tc_u32_mark)); |
| 634 | n->mark.success = 0; |
| 635 | } |
| 636 | #endif |
| 637 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 638 | err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | if (err == 0) { |
| 640 | struct tc_u_knode **ins; |
| 641 | for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next) |
| 642 | if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle)) |
| 643 | break; |
| 644 | |
| 645 | n->next = *ins; |
| 646 | wmb(); |
| 647 | *ins = n; |
| 648 | |
| 649 | *arg = (unsigned long)n; |
| 650 | return 0; |
| 651 | } |
| 652 | #ifdef CONFIG_CLS_U32_PERF |
Patrick McHardy | 1ae39a4 | 2006-03-23 01:16:48 -0800 | [diff] [blame] | 653 | kfree(n->pf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | #endif |
| 655 | kfree(n); |
| 656 | return err; |
| 657 | } |
| 658 | |
| 659 | static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| 660 | { |
| 661 | struct tc_u_common *tp_c = tp->data; |
| 662 | struct tc_u_hnode *ht; |
| 663 | struct tc_u_knode *n; |
| 664 | unsigned h; |
| 665 | |
| 666 | if (arg->stop) |
| 667 | return; |
| 668 | |
| 669 | for (ht = tp_c->hlist; ht; ht = ht->next) { |
| 670 | if (ht->prio != tp->prio) |
| 671 | continue; |
| 672 | if (arg->count >= arg->skip) { |
| 673 | if (arg->fn(tp, (unsigned long)ht, arg) < 0) { |
| 674 | arg->stop = 1; |
| 675 | return; |
| 676 | } |
| 677 | } |
| 678 | arg->count++; |
| 679 | for (h = 0; h <= ht->divisor; h++) { |
| 680 | for (n = ht->ht[h]; n; n = n->next) { |
| 681 | if (arg->count < arg->skip) { |
| 682 | arg->count++; |
| 683 | continue; |
| 684 | } |
| 685 | if (arg->fn(tp, (unsigned long)n, arg) < 0) { |
| 686 | arg->stop = 1; |
| 687 | return; |
| 688 | } |
| 689 | arg->count++; |
| 690 | } |
| 691 | } |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | static int u32_dump(struct tcf_proto *tp, unsigned long fh, |
| 696 | struct sk_buff *skb, struct tcmsg *t) |
| 697 | { |
| 698 | struct tc_u_knode *n = (struct tc_u_knode*)fh; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 699 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | |
| 701 | if (n == NULL) |
| 702 | return skb->len; |
| 703 | |
| 704 | t->tcm_handle = n->handle; |
| 705 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 706 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 707 | if (nest == NULL) |
| 708 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | |
| 710 | if (TC_U32_KEY(n->handle) == 0) { |
| 711 | struct tc_u_hnode *ht = (struct tc_u_hnode*)fh; |
| 712 | u32 divisor = ht->divisor+1; |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 713 | NLA_PUT_U32(skb, TCA_U32_DIVISOR, divisor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | } else { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 715 | NLA_PUT(skb, TCA_U32_SEL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key), |
| 717 | &n->sel); |
| 718 | if (n->ht_up) { |
| 719 | u32 htid = n->handle & 0xFFFFF000; |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 720 | NLA_PUT_U32(skb, TCA_U32_HASH, htid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | } |
| 722 | if (n->res.classid) |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 723 | NLA_PUT_U32(skb, TCA_U32_CLASSID, n->res.classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | if (n->ht_down) |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 725 | NLA_PUT_U32(skb, TCA_U32_LINK, n->ht_down->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | |
| 727 | #ifdef CONFIG_CLS_U32_MARK |
| 728 | if (n->mark.val || n->mark.mask) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 729 | NLA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | #endif |
| 731 | |
| 732 | if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 733 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
| 735 | #ifdef CONFIG_NET_CLS_IND |
| 736 | if(strlen(n->indev)) |
Patrick McHardy | 57e1c48 | 2008-01-23 20:34:28 -0800 | [diff] [blame] | 737 | NLA_PUT_STRING(skb, TCA_U32_INDEV, n->indev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | #endif |
| 739 | #ifdef CONFIG_CLS_U32_PERF |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 740 | NLA_PUT(skb, TCA_U32_PCNT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64), |
| 742 | n->pf); |
| 743 | #endif |
| 744 | } |
| 745 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 746 | nla_nest_end(skb, nest); |
| 747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | if (TC_U32_KEY(n->handle)) |
| 749 | if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 750 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | return skb->len; |
| 752 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 753 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 754 | nla_nest_cancel(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | return -1; |
| 756 | } |
| 757 | |
Patrick McHardy | 2eb9d75 | 2008-01-22 22:10:42 -0800 | [diff] [blame] | 758 | static struct tcf_proto_ops cls_u32_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | .kind = "u32", |
| 760 | .classify = u32_classify, |
| 761 | .init = u32_init, |
| 762 | .destroy = u32_destroy, |
| 763 | .get = u32_get, |
| 764 | .put = u32_put, |
| 765 | .change = u32_change, |
| 766 | .delete = u32_delete, |
| 767 | .walk = u32_walk, |
| 768 | .dump = u32_dump, |
| 769 | .owner = THIS_MODULE, |
| 770 | }; |
| 771 | |
| 772 | static int __init init_u32(void) |
| 773 | { |
| 774 | printk("u32 classifier\n"); |
| 775 | #ifdef CONFIG_CLS_U32_PERF |
Ralf Hildebrandt | c0956bd | 2006-08-15 02:12:43 -0700 | [diff] [blame] | 776 | printk(" Performance counters on\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | #ifdef CONFIG_NET_CLS_IND |
| 779 | printk(" input device check on \n"); |
| 780 | #endif |
| 781 | #ifdef CONFIG_NET_CLS_ACT |
| 782 | printk(" Actions configured \n"); |
| 783 | #endif |
| 784 | return register_tcf_proto_ops(&cls_u32_ops); |
| 785 | } |
| 786 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 787 | static void __exit exit_u32(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | { |
| 789 | unregister_tcf_proto_ops(&cls_u32_ops); |
| 790 | } |
| 791 | |
| 792 | module_init(init_u32) |
| 793 | module_exit(exit_u32) |
| 794 | MODULE_LICENSE("GPL"); |