Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/cls_route.c ROUTE4 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 | |
| 12 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <asm/uaccess.h> |
| 14 | #include <asm/system.h> |
| 15 | #include <linux/bitops.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/string.h> |
| 20 | #include <linux/mm.h> |
| 21 | #include <linux/socket.h> |
| 22 | #include <linux/sockios.h> |
| 23 | #include <linux/in.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/if_ether.h> |
| 27 | #include <linux/inet.h> |
| 28 | #include <linux/netdevice.h> |
| 29 | #include <linux/etherdevice.h> |
| 30 | #include <linux/notifier.h> |
| 31 | #include <net/ip.h> |
| 32 | #include <net/route.h> |
| 33 | #include <linux/skbuff.h> |
| 34 | #include <net/sock.h> |
| 35 | #include <net/act_api.h> |
| 36 | #include <net/pkt_cls.h> |
| 37 | |
| 38 | /* |
| 39 | 1. For now we assume that route tags < 256. |
| 40 | It allows to use direct table lookups, instead of hash tables. |
| 41 | 2. For now we assume that "from TAG" and "fromdev DEV" statements |
| 42 | are mutually exclusive. |
| 43 | 3. "to TAG from ANY" has higher priority, than "to ANY from XXX" |
| 44 | */ |
| 45 | |
| 46 | struct route4_fastmap |
| 47 | { |
| 48 | struct route4_filter *filter; |
| 49 | u32 id; |
| 50 | int iif; |
| 51 | }; |
| 52 | |
| 53 | struct route4_head |
| 54 | { |
| 55 | struct route4_fastmap fastmap[16]; |
| 56 | struct route4_bucket *table[256+1]; |
| 57 | }; |
| 58 | |
| 59 | struct route4_bucket |
| 60 | { |
| 61 | /* 16 FROM buckets + 16 IIF buckets + 1 wildcard bucket */ |
| 62 | struct route4_filter *ht[16+16+1]; |
| 63 | }; |
| 64 | |
| 65 | struct route4_filter |
| 66 | { |
| 67 | struct route4_filter *next; |
| 68 | u32 id; |
| 69 | int iif; |
| 70 | |
| 71 | struct tcf_result res; |
| 72 | struct tcf_exts exts; |
| 73 | u32 handle; |
| 74 | struct route4_bucket *bkt; |
| 75 | }; |
| 76 | |
| 77 | #define ROUTE4_FAILURE ((struct route4_filter*)(-1L)) |
| 78 | |
| 79 | static struct tcf_ext_map route_ext_map = { |
| 80 | .police = TCA_ROUTE4_POLICE, |
| 81 | .action = TCA_ROUTE4_ACT |
| 82 | }; |
| 83 | |
| 84 | static __inline__ int route4_fastmap_hash(u32 id, int iif) |
| 85 | { |
| 86 | return id&0xF; |
| 87 | } |
| 88 | |
| 89 | static inline |
| 90 | void route4_reset_fastmap(struct net_device *dev, struct route4_head *head, u32 id) |
| 91 | { |
| 92 | spin_lock_bh(&dev->queue_lock); |
| 93 | memset(head->fastmap, 0, sizeof(head->fastmap)); |
| 94 | spin_unlock_bh(&dev->queue_lock); |
| 95 | } |
| 96 | |
| 97 | static void __inline__ |
| 98 | route4_set_fastmap(struct route4_head *head, u32 id, int iif, |
| 99 | struct route4_filter *f) |
| 100 | { |
| 101 | int h = route4_fastmap_hash(id, iif); |
| 102 | head->fastmap[h].id = id; |
| 103 | head->fastmap[h].iif = iif; |
| 104 | head->fastmap[h].filter = f; |
| 105 | } |
| 106 | |
| 107 | static __inline__ int route4_hash_to(u32 id) |
| 108 | { |
| 109 | return id&0xFF; |
| 110 | } |
| 111 | |
| 112 | static __inline__ int route4_hash_from(u32 id) |
| 113 | { |
| 114 | return (id>>16)&0xF; |
| 115 | } |
| 116 | |
| 117 | static __inline__ int route4_hash_iif(int iif) |
| 118 | { |
| 119 | return 16 + ((iif>>16)&0xF); |
| 120 | } |
| 121 | |
| 122 | static __inline__ int route4_hash_wild(void) |
| 123 | { |
| 124 | return 32; |
| 125 | } |
| 126 | |
| 127 | #define ROUTE4_APPLY_RESULT() \ |
| 128 | { \ |
| 129 | *res = f->res; \ |
| 130 | if (tcf_exts_is_available(&f->exts)) { \ |
| 131 | int r = tcf_exts_exec(skb, &f->exts, res); \ |
| 132 | if (r < 0) { \ |
| 133 | dont_cache = 1; \ |
| 134 | continue; \ |
| 135 | } \ |
| 136 | return r; \ |
| 137 | } else if (!dont_cache) \ |
| 138 | route4_set_fastmap(head, id, iif, f); \ |
| 139 | return 0; \ |
| 140 | } |
| 141 | |
| 142 | static int route4_classify(struct sk_buff *skb, struct tcf_proto *tp, |
| 143 | struct tcf_result *res) |
| 144 | { |
| 145 | struct route4_head *head = (struct route4_head*)tp->root; |
| 146 | struct dst_entry *dst; |
| 147 | struct route4_bucket *b; |
| 148 | struct route4_filter *f; |
| 149 | u32 id, h; |
| 150 | int iif, dont_cache = 0; |
| 151 | |
| 152 | if ((dst = skb->dst) == NULL) |
| 153 | goto failure; |
| 154 | |
| 155 | id = dst->tclassid; |
| 156 | if (head == NULL) |
| 157 | goto old_method; |
| 158 | |
| 159 | iif = ((struct rtable*)dst)->fl.iif; |
| 160 | |
| 161 | h = route4_fastmap_hash(id, iif); |
| 162 | if (id == head->fastmap[h].id && |
| 163 | iif == head->fastmap[h].iif && |
| 164 | (f = head->fastmap[h].filter) != NULL) { |
| 165 | if (f == ROUTE4_FAILURE) |
| 166 | goto failure; |
| 167 | |
| 168 | *res = f->res; |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | h = route4_hash_to(id); |
| 173 | |
| 174 | restart: |
| 175 | if ((b = head->table[h]) != NULL) { |
| 176 | for (f = b->ht[route4_hash_from(id)]; f; f = f->next) |
| 177 | if (f->id == id) |
| 178 | ROUTE4_APPLY_RESULT(); |
| 179 | |
| 180 | for (f = b->ht[route4_hash_iif(iif)]; f; f = f->next) |
| 181 | if (f->iif == iif) |
| 182 | ROUTE4_APPLY_RESULT(); |
| 183 | |
| 184 | for (f = b->ht[route4_hash_wild()]; f; f = f->next) |
| 185 | ROUTE4_APPLY_RESULT(); |
| 186 | |
| 187 | } |
| 188 | if (h < 256) { |
| 189 | h = 256; |
| 190 | id &= ~0xFFFF; |
| 191 | goto restart; |
| 192 | } |
| 193 | |
| 194 | if (!dont_cache) |
| 195 | route4_set_fastmap(head, id, iif, ROUTE4_FAILURE); |
| 196 | failure: |
| 197 | return -1; |
| 198 | |
| 199 | old_method: |
| 200 | if (id && (TC_H_MAJ(id) == 0 || |
| 201 | !(TC_H_MAJ(id^tp->q->handle)))) { |
| 202 | res->classid = id; |
| 203 | res->class = 0; |
| 204 | return 0; |
| 205 | } |
| 206 | return -1; |
| 207 | } |
| 208 | |
| 209 | static inline u32 to_hash(u32 id) |
| 210 | { |
| 211 | u32 h = id&0xFF; |
| 212 | if (id&0x8000) |
| 213 | h += 256; |
| 214 | return h; |
| 215 | } |
| 216 | |
| 217 | static inline u32 from_hash(u32 id) |
| 218 | { |
| 219 | id &= 0xFFFF; |
| 220 | if (id == 0xFFFF) |
| 221 | return 32; |
| 222 | if (!(id & 0x8000)) { |
| 223 | if (id > 255) |
| 224 | return 256; |
| 225 | return id&0xF; |
| 226 | } |
| 227 | return 16 + (id&0xF); |
| 228 | } |
| 229 | |
| 230 | static unsigned long route4_get(struct tcf_proto *tp, u32 handle) |
| 231 | { |
| 232 | struct route4_head *head = (struct route4_head*)tp->root; |
| 233 | struct route4_bucket *b; |
| 234 | struct route4_filter *f; |
| 235 | unsigned h1, h2; |
| 236 | |
| 237 | if (!head) |
| 238 | return 0; |
| 239 | |
| 240 | h1 = to_hash(handle); |
| 241 | if (h1 > 256) |
| 242 | return 0; |
| 243 | |
| 244 | h2 = from_hash(handle>>16); |
| 245 | if (h2 > 32) |
| 246 | return 0; |
| 247 | |
| 248 | if ((b = head->table[h1]) != NULL) { |
| 249 | for (f = b->ht[h2]; f; f = f->next) |
| 250 | if (f->handle == handle) |
| 251 | return (unsigned long)f; |
| 252 | } |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | static void route4_put(struct tcf_proto *tp, unsigned long f) |
| 257 | { |
| 258 | } |
| 259 | |
| 260 | static int route4_init(struct tcf_proto *tp) |
| 261 | { |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | static inline void |
| 266 | route4_delete_filter(struct tcf_proto *tp, struct route4_filter *f) |
| 267 | { |
| 268 | tcf_unbind_filter(tp, &f->res); |
| 269 | tcf_exts_destroy(tp, &f->exts); |
| 270 | kfree(f); |
| 271 | } |
| 272 | |
| 273 | static void route4_destroy(struct tcf_proto *tp) |
| 274 | { |
| 275 | struct route4_head *head = xchg(&tp->root, NULL); |
| 276 | int h1, h2; |
| 277 | |
| 278 | if (head == NULL) |
| 279 | return; |
| 280 | |
| 281 | for (h1=0; h1<=256; h1++) { |
| 282 | struct route4_bucket *b; |
| 283 | |
| 284 | if ((b = head->table[h1]) != NULL) { |
| 285 | for (h2=0; h2<=32; h2++) { |
| 286 | struct route4_filter *f; |
| 287 | |
| 288 | while ((f = b->ht[h2]) != NULL) { |
| 289 | b->ht[h2] = f->next; |
| 290 | route4_delete_filter(tp, f); |
| 291 | } |
| 292 | } |
| 293 | kfree(b); |
| 294 | } |
| 295 | } |
| 296 | kfree(head); |
| 297 | } |
| 298 | |
| 299 | static int route4_delete(struct tcf_proto *tp, unsigned long arg) |
| 300 | { |
| 301 | struct route4_head *head = (struct route4_head*)tp->root; |
| 302 | struct route4_filter **fp, *f = (struct route4_filter*)arg; |
| 303 | unsigned h = 0; |
| 304 | struct route4_bucket *b; |
| 305 | int i; |
| 306 | |
| 307 | if (!head || !f) |
| 308 | return -EINVAL; |
| 309 | |
| 310 | h = f->handle; |
| 311 | b = f->bkt; |
| 312 | |
| 313 | for (fp = &b->ht[from_hash(h>>16)]; *fp; fp = &(*fp)->next) { |
| 314 | if (*fp == f) { |
| 315 | tcf_tree_lock(tp); |
| 316 | *fp = f->next; |
| 317 | tcf_tree_unlock(tp); |
| 318 | |
| 319 | route4_reset_fastmap(tp->q->dev, head, f->id); |
| 320 | route4_delete_filter(tp, f); |
| 321 | |
| 322 | /* Strip tree */ |
| 323 | |
| 324 | for (i=0; i<=32; i++) |
| 325 | if (b->ht[i]) |
| 326 | return 0; |
| 327 | |
| 328 | /* OK, session has no flows */ |
| 329 | tcf_tree_lock(tp); |
| 330 | head->table[to_hash(h)] = NULL; |
| 331 | tcf_tree_unlock(tp); |
| 332 | |
| 333 | kfree(b); |
| 334 | return 0; |
| 335 | } |
| 336 | } |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | static int route4_set_parms(struct tcf_proto *tp, unsigned long base, |
| 341 | struct route4_filter *f, u32 handle, struct route4_head *head, |
| 342 | struct rtattr **tb, struct rtattr *est, int new) |
| 343 | { |
| 344 | int err; |
| 345 | u32 id = 0, to = 0, nhandle = 0x8000; |
| 346 | struct route4_filter *fp; |
| 347 | unsigned int h1; |
| 348 | struct route4_bucket *b; |
| 349 | struct tcf_exts e; |
| 350 | |
| 351 | err = tcf_exts_validate(tp, tb, est, &e, &route_ext_map); |
| 352 | if (err < 0) |
| 353 | return err; |
| 354 | |
| 355 | err = -EINVAL; |
| 356 | if (tb[TCA_ROUTE4_CLASSID-1]) |
| 357 | if (RTA_PAYLOAD(tb[TCA_ROUTE4_CLASSID-1]) < sizeof(u32)) |
| 358 | goto errout; |
| 359 | |
| 360 | if (tb[TCA_ROUTE4_TO-1]) { |
| 361 | if (new && handle & 0x8000) |
| 362 | goto errout; |
| 363 | if (RTA_PAYLOAD(tb[TCA_ROUTE4_TO-1]) < sizeof(u32)) |
| 364 | goto errout; |
| 365 | to = *(u32*)RTA_DATA(tb[TCA_ROUTE4_TO-1]); |
| 366 | if (to > 0xFF) |
| 367 | goto errout; |
| 368 | nhandle = to; |
| 369 | } |
| 370 | |
| 371 | if (tb[TCA_ROUTE4_FROM-1]) { |
| 372 | if (tb[TCA_ROUTE4_IIF-1]) |
| 373 | goto errout; |
| 374 | if (RTA_PAYLOAD(tb[TCA_ROUTE4_FROM-1]) < sizeof(u32)) |
| 375 | goto errout; |
| 376 | id = *(u32*)RTA_DATA(tb[TCA_ROUTE4_FROM-1]); |
| 377 | if (id > 0xFF) |
| 378 | goto errout; |
| 379 | nhandle |= id << 16; |
| 380 | } else if (tb[TCA_ROUTE4_IIF-1]) { |
| 381 | if (RTA_PAYLOAD(tb[TCA_ROUTE4_IIF-1]) < sizeof(u32)) |
| 382 | goto errout; |
| 383 | id = *(u32*)RTA_DATA(tb[TCA_ROUTE4_IIF-1]); |
| 384 | if (id > 0x7FFF) |
| 385 | goto errout; |
| 386 | nhandle |= (id | 0x8000) << 16; |
| 387 | } else |
| 388 | nhandle |= 0xFFFF << 16; |
| 389 | |
| 390 | if (handle && new) { |
| 391 | nhandle |= handle & 0x7F00; |
| 392 | if (nhandle != handle) |
| 393 | goto errout; |
| 394 | } |
| 395 | |
| 396 | h1 = to_hash(nhandle); |
| 397 | if ((b = head->table[h1]) == NULL) { |
| 398 | err = -ENOBUFS; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame^] | 399 | b = kzalloc(sizeof(struct route4_bucket), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | if (b == NULL) |
| 401 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
| 403 | tcf_tree_lock(tp); |
| 404 | head->table[h1] = b; |
| 405 | tcf_tree_unlock(tp); |
| 406 | } else { |
| 407 | unsigned int h2 = from_hash(nhandle >> 16); |
| 408 | err = -EEXIST; |
| 409 | for (fp = b->ht[h2]; fp; fp = fp->next) |
| 410 | if (fp->handle == f->handle) |
| 411 | goto errout; |
| 412 | } |
| 413 | |
| 414 | tcf_tree_lock(tp); |
| 415 | if (tb[TCA_ROUTE4_TO-1]) |
| 416 | f->id = to; |
| 417 | |
| 418 | if (tb[TCA_ROUTE4_FROM-1]) |
| 419 | f->id = to | id<<16; |
| 420 | else if (tb[TCA_ROUTE4_IIF-1]) |
| 421 | f->iif = id; |
| 422 | |
| 423 | f->handle = nhandle; |
| 424 | f->bkt = b; |
| 425 | tcf_tree_unlock(tp); |
| 426 | |
| 427 | if (tb[TCA_ROUTE4_CLASSID-1]) { |
| 428 | f->res.classid = *(u32*)RTA_DATA(tb[TCA_ROUTE4_CLASSID-1]); |
| 429 | tcf_bind_filter(tp, &f->res, base); |
| 430 | } |
| 431 | |
| 432 | tcf_exts_change(tp, &f->exts, &e); |
| 433 | |
| 434 | return 0; |
| 435 | errout: |
| 436 | tcf_exts_destroy(tp, &e); |
| 437 | return err; |
| 438 | } |
| 439 | |
| 440 | static int route4_change(struct tcf_proto *tp, unsigned long base, |
| 441 | u32 handle, |
| 442 | struct rtattr **tca, |
| 443 | unsigned long *arg) |
| 444 | { |
| 445 | struct route4_head *head = tp->root; |
| 446 | struct route4_filter *f, *f1, **fp; |
| 447 | struct route4_bucket *b; |
| 448 | struct rtattr *opt = tca[TCA_OPTIONS-1]; |
| 449 | struct rtattr *tb[TCA_ROUTE4_MAX]; |
| 450 | unsigned int h, th; |
| 451 | u32 old_handle = 0; |
| 452 | int err; |
| 453 | |
| 454 | if (opt == NULL) |
| 455 | return handle ? -EINVAL : 0; |
| 456 | |
| 457 | if (rtattr_parse_nested(tb, TCA_ROUTE4_MAX, opt) < 0) |
| 458 | return -EINVAL; |
| 459 | |
| 460 | if ((f = (struct route4_filter*)*arg) != NULL) { |
| 461 | if (f->handle != handle && handle) |
| 462 | return -EINVAL; |
| 463 | |
| 464 | if (f->bkt) |
| 465 | old_handle = f->handle; |
| 466 | |
| 467 | err = route4_set_parms(tp, base, f, handle, head, tb, |
| 468 | tca[TCA_RATE-1], 0); |
| 469 | if (err < 0) |
| 470 | return err; |
| 471 | |
| 472 | goto reinsert; |
| 473 | } |
| 474 | |
| 475 | err = -ENOBUFS; |
| 476 | if (head == NULL) { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame^] | 477 | head = kzalloc(sizeof(struct route4_head), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | if (head == NULL) |
| 479 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | tcf_tree_lock(tp); |
| 482 | tp->root = head; |
| 483 | tcf_tree_unlock(tp); |
| 484 | } |
| 485 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame^] | 486 | f = kzalloc(sizeof(struct route4_filter), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | if (f == NULL) |
| 488 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | |
| 490 | err = route4_set_parms(tp, base, f, handle, head, tb, |
| 491 | tca[TCA_RATE-1], 1); |
| 492 | if (err < 0) |
| 493 | goto errout; |
| 494 | |
| 495 | reinsert: |
| 496 | h = from_hash(f->handle >> 16); |
| 497 | for (fp = &f->bkt->ht[h]; (f1=*fp) != NULL; fp = &f1->next) |
| 498 | if (f->handle < f1->handle) |
| 499 | break; |
| 500 | |
| 501 | f->next = f1; |
| 502 | tcf_tree_lock(tp); |
| 503 | *fp = f; |
| 504 | |
| 505 | if (old_handle && f->handle != old_handle) { |
| 506 | th = to_hash(old_handle); |
| 507 | h = from_hash(old_handle >> 16); |
| 508 | if ((b = head->table[th]) != NULL) { |
| 509 | for (fp = &b->ht[h]; *fp; fp = &(*fp)->next) { |
| 510 | if (*fp == f) { |
| 511 | *fp = f->next; |
| 512 | break; |
| 513 | } |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | tcf_tree_unlock(tp); |
| 518 | |
| 519 | route4_reset_fastmap(tp->q->dev, head, f->id); |
| 520 | *arg = (unsigned long)f; |
| 521 | return 0; |
| 522 | |
| 523 | errout: |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 524 | kfree(f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | return err; |
| 526 | } |
| 527 | |
| 528 | static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| 529 | { |
| 530 | struct route4_head *head = tp->root; |
| 531 | unsigned h, h1; |
| 532 | |
| 533 | if (head == NULL) |
| 534 | arg->stop = 1; |
| 535 | |
| 536 | if (arg->stop) |
| 537 | return; |
| 538 | |
| 539 | for (h = 0; h <= 256; h++) { |
| 540 | struct route4_bucket *b = head->table[h]; |
| 541 | |
| 542 | if (b) { |
| 543 | for (h1 = 0; h1 <= 32; h1++) { |
| 544 | struct route4_filter *f; |
| 545 | |
| 546 | for (f = b->ht[h1]; f; f = f->next) { |
| 547 | if (arg->count < arg->skip) { |
| 548 | arg->count++; |
| 549 | continue; |
| 550 | } |
| 551 | if (arg->fn(tp, (unsigned long)f, arg) < 0) { |
| 552 | arg->stop = 1; |
| 553 | return; |
| 554 | } |
| 555 | arg->count++; |
| 556 | } |
| 557 | } |
| 558 | } |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | static int route4_dump(struct tcf_proto *tp, unsigned long fh, |
| 563 | struct sk_buff *skb, struct tcmsg *t) |
| 564 | { |
| 565 | struct route4_filter *f = (struct route4_filter*)fh; |
| 566 | unsigned char *b = skb->tail; |
| 567 | struct rtattr *rta; |
| 568 | u32 id; |
| 569 | |
| 570 | if (f == NULL) |
| 571 | return skb->len; |
| 572 | |
| 573 | t->tcm_handle = f->handle; |
| 574 | |
| 575 | rta = (struct rtattr*)b; |
| 576 | RTA_PUT(skb, TCA_OPTIONS, 0, NULL); |
| 577 | |
| 578 | if (!(f->handle&0x8000)) { |
| 579 | id = f->id&0xFF; |
| 580 | RTA_PUT(skb, TCA_ROUTE4_TO, sizeof(id), &id); |
| 581 | } |
| 582 | if (f->handle&0x80000000) { |
| 583 | if ((f->handle>>16) != 0xFFFF) |
| 584 | RTA_PUT(skb, TCA_ROUTE4_IIF, sizeof(f->iif), &f->iif); |
| 585 | } else { |
| 586 | id = f->id>>16; |
| 587 | RTA_PUT(skb, TCA_ROUTE4_FROM, sizeof(id), &id); |
| 588 | } |
| 589 | if (f->res.classid) |
| 590 | RTA_PUT(skb, TCA_ROUTE4_CLASSID, 4, &f->res.classid); |
| 591 | |
| 592 | if (tcf_exts_dump(skb, &f->exts, &route_ext_map) < 0) |
| 593 | goto rtattr_failure; |
| 594 | |
| 595 | rta->rta_len = skb->tail - b; |
| 596 | |
| 597 | if (tcf_exts_dump_stats(skb, &f->exts, &route_ext_map) < 0) |
| 598 | goto rtattr_failure; |
| 599 | |
| 600 | return skb->len; |
| 601 | |
| 602 | rtattr_failure: |
| 603 | skb_trim(skb, b - skb->data); |
| 604 | return -1; |
| 605 | } |
| 606 | |
| 607 | static struct tcf_proto_ops cls_route4_ops = { |
| 608 | .next = NULL, |
| 609 | .kind = "route", |
| 610 | .classify = route4_classify, |
| 611 | .init = route4_init, |
| 612 | .destroy = route4_destroy, |
| 613 | .get = route4_get, |
| 614 | .put = route4_put, |
| 615 | .change = route4_change, |
| 616 | .delete = route4_delete, |
| 617 | .walk = route4_walk, |
| 618 | .dump = route4_dump, |
| 619 | .owner = THIS_MODULE, |
| 620 | }; |
| 621 | |
| 622 | static int __init init_route4(void) |
| 623 | { |
| 624 | return register_tcf_proto_ops(&cls_route4_ops); |
| 625 | } |
| 626 | |
| 627 | static void __exit exit_route4(void) |
| 628 | { |
| 629 | unregister_tcf_proto_ops(&cls_route4_ops); |
| 630 | } |
| 631 | |
| 632 | module_init(init_route4) |
| 633 | module_exit(exit_route4) |
| 634 | MODULE_LICENSE("GPL"); |