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 <linux/types.h> |
| 14 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/skbuff.h> |
Patrick McHardy | 0ba4805 | 2007-07-02 22:49:07 -0700 | [diff] [blame] | 18 | #include <net/dst.h> |
| 19 | #include <net/route.h> |
| 20 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <net/act_api.h> |
| 22 | #include <net/pkt_cls.h> |
| 23 | |
| 24 | /* |
| 25 | 1. For now we assume that route tags < 256. |
| 26 | It allows to use direct table lookups, instead of hash tables. |
| 27 | 2. For now we assume that "from TAG" and "fromdev DEV" statements |
| 28 | are mutually exclusive. |
| 29 | 3. "to TAG from ANY" has higher priority, than "to ANY from XXX" |
| 30 | */ |
| 31 | |
| 32 | struct route4_fastmap |
| 33 | { |
| 34 | struct route4_filter *filter; |
| 35 | u32 id; |
| 36 | int iif; |
| 37 | }; |
| 38 | |
| 39 | struct route4_head |
| 40 | { |
| 41 | struct route4_fastmap fastmap[16]; |
| 42 | struct route4_bucket *table[256+1]; |
| 43 | }; |
| 44 | |
| 45 | struct route4_bucket |
| 46 | { |
| 47 | /* 16 FROM buckets + 16 IIF buckets + 1 wildcard bucket */ |
| 48 | struct route4_filter *ht[16+16+1]; |
| 49 | }; |
| 50 | |
| 51 | struct route4_filter |
| 52 | { |
| 53 | struct route4_filter *next; |
| 54 | u32 id; |
| 55 | int iif; |
| 56 | |
| 57 | struct tcf_result res; |
| 58 | struct tcf_exts exts; |
| 59 | u32 handle; |
| 60 | struct route4_bucket *bkt; |
| 61 | }; |
| 62 | |
| 63 | #define ROUTE4_FAILURE ((struct route4_filter*)(-1L)) |
| 64 | |
Patrick McHardy | 5239008 | 2008-01-31 18:36:18 -0800 | [diff] [blame] | 65 | static const struct tcf_ext_map route_ext_map = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | .police = TCA_ROUTE4_POLICE, |
| 67 | .action = TCA_ROUTE4_ACT |
| 68 | }; |
| 69 | |
| 70 | static __inline__ int route4_fastmap_hash(u32 id, int iif) |
| 71 | { |
| 72 | return id&0xF; |
| 73 | } |
| 74 | |
| 75 | static inline |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame^] | 76 | void route4_reset_fastmap(struct Qdisc *q, struct route4_head *head, u32 id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | { |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame^] | 78 | spinlock_t *root_lock = qdisc_root_lock(q); |
| 79 | |
| 80 | spin_lock_bh(root_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | memset(head->fastmap, 0, sizeof(head->fastmap)); |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame^] | 82 | spin_unlock_bh(root_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 85 | static inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | route4_set_fastmap(struct route4_head *head, u32 id, int iif, |
| 87 | struct route4_filter *f) |
| 88 | { |
| 89 | int h = route4_fastmap_hash(id, iif); |
| 90 | head->fastmap[h].id = id; |
| 91 | head->fastmap[h].iif = iif; |
| 92 | head->fastmap[h].filter = f; |
| 93 | } |
| 94 | |
| 95 | static __inline__ int route4_hash_to(u32 id) |
| 96 | { |
| 97 | return id&0xFF; |
| 98 | } |
| 99 | |
| 100 | static __inline__ int route4_hash_from(u32 id) |
| 101 | { |
| 102 | return (id>>16)&0xF; |
| 103 | } |
| 104 | |
| 105 | static __inline__ int route4_hash_iif(int iif) |
| 106 | { |
| 107 | return 16 + ((iif>>16)&0xF); |
| 108 | } |
| 109 | |
| 110 | static __inline__ int route4_hash_wild(void) |
| 111 | { |
| 112 | return 32; |
| 113 | } |
| 114 | |
| 115 | #define ROUTE4_APPLY_RESULT() \ |
| 116 | { \ |
| 117 | *res = f->res; \ |
| 118 | if (tcf_exts_is_available(&f->exts)) { \ |
| 119 | int r = tcf_exts_exec(skb, &f->exts, res); \ |
| 120 | if (r < 0) { \ |
| 121 | dont_cache = 1; \ |
| 122 | continue; \ |
| 123 | } \ |
| 124 | return r; \ |
| 125 | } else if (!dont_cache) \ |
| 126 | route4_set_fastmap(head, id, iif, f); \ |
| 127 | return 0; \ |
| 128 | } |
| 129 | |
| 130 | static int route4_classify(struct sk_buff *skb, struct tcf_proto *tp, |
| 131 | struct tcf_result *res) |
| 132 | { |
| 133 | struct route4_head *head = (struct route4_head*)tp->root; |
| 134 | struct dst_entry *dst; |
| 135 | struct route4_bucket *b; |
| 136 | struct route4_filter *f; |
| 137 | u32 id, h; |
| 138 | int iif, dont_cache = 0; |
| 139 | |
| 140 | if ((dst = skb->dst) == NULL) |
| 141 | goto failure; |
| 142 | |
| 143 | id = dst->tclassid; |
| 144 | if (head == NULL) |
| 145 | goto old_method; |
| 146 | |
| 147 | iif = ((struct rtable*)dst)->fl.iif; |
| 148 | |
| 149 | h = route4_fastmap_hash(id, iif); |
| 150 | if (id == head->fastmap[h].id && |
| 151 | iif == head->fastmap[h].iif && |
| 152 | (f = head->fastmap[h].filter) != NULL) { |
| 153 | if (f == ROUTE4_FAILURE) |
| 154 | goto failure; |
| 155 | |
| 156 | *res = f->res; |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | h = route4_hash_to(id); |
| 161 | |
| 162 | restart: |
| 163 | if ((b = head->table[h]) != NULL) { |
| 164 | for (f = b->ht[route4_hash_from(id)]; f; f = f->next) |
| 165 | if (f->id == id) |
| 166 | ROUTE4_APPLY_RESULT(); |
| 167 | |
| 168 | for (f = b->ht[route4_hash_iif(iif)]; f; f = f->next) |
| 169 | if (f->iif == iif) |
| 170 | ROUTE4_APPLY_RESULT(); |
| 171 | |
| 172 | for (f = b->ht[route4_hash_wild()]; f; f = f->next) |
| 173 | ROUTE4_APPLY_RESULT(); |
| 174 | |
| 175 | } |
| 176 | if (h < 256) { |
| 177 | h = 256; |
| 178 | id &= ~0xFFFF; |
| 179 | goto restart; |
| 180 | } |
| 181 | |
| 182 | if (!dont_cache) |
| 183 | route4_set_fastmap(head, id, iif, ROUTE4_FAILURE); |
| 184 | failure: |
| 185 | return -1; |
| 186 | |
| 187 | old_method: |
| 188 | if (id && (TC_H_MAJ(id) == 0 || |
| 189 | !(TC_H_MAJ(id^tp->q->handle)))) { |
| 190 | res->classid = id; |
| 191 | res->class = 0; |
| 192 | return 0; |
| 193 | } |
| 194 | return -1; |
| 195 | } |
| 196 | |
| 197 | static inline u32 to_hash(u32 id) |
| 198 | { |
| 199 | u32 h = id&0xFF; |
| 200 | if (id&0x8000) |
| 201 | h += 256; |
| 202 | return h; |
| 203 | } |
| 204 | |
| 205 | static inline u32 from_hash(u32 id) |
| 206 | { |
| 207 | id &= 0xFFFF; |
| 208 | if (id == 0xFFFF) |
| 209 | return 32; |
| 210 | if (!(id & 0x8000)) { |
| 211 | if (id > 255) |
| 212 | return 256; |
| 213 | return id&0xF; |
| 214 | } |
| 215 | return 16 + (id&0xF); |
| 216 | } |
| 217 | |
| 218 | static unsigned long route4_get(struct tcf_proto *tp, u32 handle) |
| 219 | { |
| 220 | struct route4_head *head = (struct route4_head*)tp->root; |
| 221 | struct route4_bucket *b; |
| 222 | struct route4_filter *f; |
| 223 | unsigned h1, h2; |
| 224 | |
| 225 | if (!head) |
| 226 | return 0; |
| 227 | |
| 228 | h1 = to_hash(handle); |
| 229 | if (h1 > 256) |
| 230 | return 0; |
| 231 | |
| 232 | h2 = from_hash(handle>>16); |
| 233 | if (h2 > 32) |
| 234 | return 0; |
| 235 | |
| 236 | if ((b = head->table[h1]) != NULL) { |
| 237 | for (f = b->ht[h2]; f; f = f->next) |
| 238 | if (f->handle == handle) |
| 239 | return (unsigned long)f; |
| 240 | } |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | static void route4_put(struct tcf_proto *tp, unsigned long f) |
| 245 | { |
| 246 | } |
| 247 | |
| 248 | static int route4_init(struct tcf_proto *tp) |
| 249 | { |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | static inline void |
| 254 | route4_delete_filter(struct tcf_proto *tp, struct route4_filter *f) |
| 255 | { |
| 256 | tcf_unbind_filter(tp, &f->res); |
| 257 | tcf_exts_destroy(tp, &f->exts); |
| 258 | kfree(f); |
| 259 | } |
| 260 | |
| 261 | static void route4_destroy(struct tcf_proto *tp) |
| 262 | { |
| 263 | struct route4_head *head = xchg(&tp->root, NULL); |
| 264 | int h1, h2; |
| 265 | |
| 266 | if (head == NULL) |
| 267 | return; |
| 268 | |
| 269 | for (h1=0; h1<=256; h1++) { |
| 270 | struct route4_bucket *b; |
| 271 | |
| 272 | if ((b = head->table[h1]) != NULL) { |
| 273 | for (h2=0; h2<=32; h2++) { |
| 274 | struct route4_filter *f; |
| 275 | |
| 276 | while ((f = b->ht[h2]) != NULL) { |
| 277 | b->ht[h2] = f->next; |
| 278 | route4_delete_filter(tp, f); |
| 279 | } |
| 280 | } |
| 281 | kfree(b); |
| 282 | } |
| 283 | } |
| 284 | kfree(head); |
| 285 | } |
| 286 | |
| 287 | static int route4_delete(struct tcf_proto *tp, unsigned long arg) |
| 288 | { |
| 289 | struct route4_head *head = (struct route4_head*)tp->root; |
| 290 | struct route4_filter **fp, *f = (struct route4_filter*)arg; |
| 291 | unsigned h = 0; |
| 292 | struct route4_bucket *b; |
| 293 | int i; |
| 294 | |
| 295 | if (!head || !f) |
| 296 | return -EINVAL; |
| 297 | |
| 298 | h = f->handle; |
| 299 | b = f->bkt; |
| 300 | |
| 301 | for (fp = &b->ht[from_hash(h>>16)]; *fp; fp = &(*fp)->next) { |
| 302 | if (*fp == f) { |
| 303 | tcf_tree_lock(tp); |
| 304 | *fp = f->next; |
| 305 | tcf_tree_unlock(tp); |
| 306 | |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame^] | 307 | route4_reset_fastmap(tp->q, head, f->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | route4_delete_filter(tp, f); |
| 309 | |
| 310 | /* Strip tree */ |
| 311 | |
| 312 | for (i=0; i<=32; i++) |
| 313 | if (b->ht[i]) |
| 314 | return 0; |
| 315 | |
| 316 | /* OK, session has no flows */ |
| 317 | tcf_tree_lock(tp); |
| 318 | head->table[to_hash(h)] = NULL; |
| 319 | tcf_tree_unlock(tp); |
| 320 | |
| 321 | kfree(b); |
| 322 | return 0; |
| 323 | } |
| 324 | } |
| 325 | return 0; |
| 326 | } |
| 327 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 328 | static const struct nla_policy route4_policy[TCA_ROUTE4_MAX + 1] = { |
| 329 | [TCA_ROUTE4_CLASSID] = { .type = NLA_U32 }, |
| 330 | [TCA_ROUTE4_TO] = { .type = NLA_U32 }, |
| 331 | [TCA_ROUTE4_FROM] = { .type = NLA_U32 }, |
| 332 | [TCA_ROUTE4_IIF] = { .type = NLA_U32 }, |
| 333 | }; |
| 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | static int route4_set_parms(struct tcf_proto *tp, unsigned long base, |
| 336 | struct route4_filter *f, u32 handle, struct route4_head *head, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 337 | struct nlattr **tb, struct nlattr *est, int new) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | { |
| 339 | int err; |
| 340 | u32 id = 0, to = 0, nhandle = 0x8000; |
| 341 | struct route4_filter *fp; |
| 342 | unsigned int h1; |
| 343 | struct route4_bucket *b; |
| 344 | struct tcf_exts e; |
| 345 | |
| 346 | err = tcf_exts_validate(tp, tb, est, &e, &route_ext_map); |
| 347 | if (err < 0) |
| 348 | return err; |
| 349 | |
| 350 | err = -EINVAL; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 351 | if (tb[TCA_ROUTE4_TO]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | if (new && handle & 0x8000) |
| 353 | goto errout; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 354 | to = nla_get_u32(tb[TCA_ROUTE4_TO]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | if (to > 0xFF) |
| 356 | goto errout; |
| 357 | nhandle = to; |
| 358 | } |
| 359 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 360 | if (tb[TCA_ROUTE4_FROM]) { |
| 361 | if (tb[TCA_ROUTE4_IIF]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | goto errout; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 363 | id = nla_get_u32(tb[TCA_ROUTE4_FROM]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (id > 0xFF) |
| 365 | goto errout; |
| 366 | nhandle |= id << 16; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 367 | } else if (tb[TCA_ROUTE4_IIF]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 368 | id = nla_get_u32(tb[TCA_ROUTE4_IIF]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | if (id > 0x7FFF) |
| 370 | goto errout; |
| 371 | nhandle |= (id | 0x8000) << 16; |
| 372 | } else |
| 373 | nhandle |= 0xFFFF << 16; |
| 374 | |
| 375 | if (handle && new) { |
| 376 | nhandle |= handle & 0x7F00; |
| 377 | if (nhandle != handle) |
| 378 | goto errout; |
| 379 | } |
| 380 | |
| 381 | h1 = to_hash(nhandle); |
| 382 | if ((b = head->table[h1]) == NULL) { |
| 383 | err = -ENOBUFS; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 384 | b = kzalloc(sizeof(struct route4_bucket), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | if (b == NULL) |
| 386 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
| 388 | tcf_tree_lock(tp); |
| 389 | head->table[h1] = b; |
| 390 | tcf_tree_unlock(tp); |
| 391 | } else { |
| 392 | unsigned int h2 = from_hash(nhandle >> 16); |
| 393 | err = -EEXIST; |
| 394 | for (fp = b->ht[h2]; fp; fp = fp->next) |
| 395 | if (fp->handle == f->handle) |
| 396 | goto errout; |
| 397 | } |
| 398 | |
| 399 | tcf_tree_lock(tp); |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 400 | if (tb[TCA_ROUTE4_TO]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | f->id = to; |
| 402 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 403 | if (tb[TCA_ROUTE4_FROM]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | f->id = to | id<<16; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 405 | else if (tb[TCA_ROUTE4_IIF]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | f->iif = id; |
| 407 | |
| 408 | f->handle = nhandle; |
| 409 | f->bkt = b; |
| 410 | tcf_tree_unlock(tp); |
| 411 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 412 | if (tb[TCA_ROUTE4_CLASSID]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 413 | f->res.classid = nla_get_u32(tb[TCA_ROUTE4_CLASSID]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | tcf_bind_filter(tp, &f->res, base); |
| 415 | } |
| 416 | |
| 417 | tcf_exts_change(tp, &f->exts, &e); |
| 418 | |
| 419 | return 0; |
| 420 | errout: |
| 421 | tcf_exts_destroy(tp, &e); |
| 422 | return err; |
| 423 | } |
| 424 | |
| 425 | static int route4_change(struct tcf_proto *tp, unsigned long base, |
| 426 | u32 handle, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 427 | struct nlattr **tca, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | unsigned long *arg) |
| 429 | { |
| 430 | struct route4_head *head = tp->root; |
| 431 | struct route4_filter *f, *f1, **fp; |
| 432 | struct route4_bucket *b; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 433 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 434 | struct nlattr *tb[TCA_ROUTE4_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | unsigned int h, th; |
| 436 | u32 old_handle = 0; |
| 437 | int err; |
| 438 | |
| 439 | if (opt == NULL) |
| 440 | return handle ? -EINVAL : 0; |
| 441 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 442 | err = nla_parse_nested(tb, TCA_ROUTE4_MAX, opt, route4_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 443 | if (err < 0) |
| 444 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
| 446 | if ((f = (struct route4_filter*)*arg) != NULL) { |
| 447 | if (f->handle != handle && handle) |
| 448 | return -EINVAL; |
| 449 | |
| 450 | if (f->bkt) |
| 451 | old_handle = f->handle; |
| 452 | |
| 453 | err = route4_set_parms(tp, base, f, handle, head, tb, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 454 | tca[TCA_RATE], 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | if (err < 0) |
| 456 | return err; |
| 457 | |
| 458 | goto reinsert; |
| 459 | } |
| 460 | |
| 461 | err = -ENOBUFS; |
| 462 | if (head == NULL) { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 463 | head = kzalloc(sizeof(struct route4_head), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | if (head == NULL) |
| 465 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
| 467 | tcf_tree_lock(tp); |
| 468 | tp->root = head; |
| 469 | tcf_tree_unlock(tp); |
| 470 | } |
| 471 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 472 | f = kzalloc(sizeof(struct route4_filter), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | if (f == NULL) |
| 474 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
| 476 | err = route4_set_parms(tp, base, f, handle, head, tb, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 477 | tca[TCA_RATE], 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | if (err < 0) |
| 479 | goto errout; |
| 480 | |
| 481 | reinsert: |
| 482 | h = from_hash(f->handle >> 16); |
| 483 | for (fp = &f->bkt->ht[h]; (f1=*fp) != NULL; fp = &f1->next) |
| 484 | if (f->handle < f1->handle) |
| 485 | break; |
| 486 | |
| 487 | f->next = f1; |
| 488 | tcf_tree_lock(tp); |
| 489 | *fp = f; |
| 490 | |
| 491 | if (old_handle && f->handle != old_handle) { |
| 492 | th = to_hash(old_handle); |
| 493 | h = from_hash(old_handle >> 16); |
| 494 | if ((b = head->table[th]) != NULL) { |
| 495 | for (fp = &b->ht[h]; *fp; fp = &(*fp)->next) { |
| 496 | if (*fp == f) { |
| 497 | *fp = f->next; |
| 498 | break; |
| 499 | } |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | tcf_tree_unlock(tp); |
| 504 | |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame^] | 505 | route4_reset_fastmap(tp->q, head, f->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | *arg = (unsigned long)f; |
| 507 | return 0; |
| 508 | |
| 509 | errout: |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 510 | kfree(f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | return err; |
| 512 | } |
| 513 | |
| 514 | static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| 515 | { |
| 516 | struct route4_head *head = tp->root; |
| 517 | unsigned h, h1; |
| 518 | |
| 519 | if (head == NULL) |
| 520 | arg->stop = 1; |
| 521 | |
| 522 | if (arg->stop) |
| 523 | return; |
| 524 | |
| 525 | for (h = 0; h <= 256; h++) { |
| 526 | struct route4_bucket *b = head->table[h]; |
| 527 | |
| 528 | if (b) { |
| 529 | for (h1 = 0; h1 <= 32; h1++) { |
| 530 | struct route4_filter *f; |
| 531 | |
| 532 | for (f = b->ht[h1]; f; f = f->next) { |
| 533 | if (arg->count < arg->skip) { |
| 534 | arg->count++; |
| 535 | continue; |
| 536 | } |
| 537 | if (arg->fn(tp, (unsigned long)f, arg) < 0) { |
| 538 | arg->stop = 1; |
| 539 | return; |
| 540 | } |
| 541 | arg->count++; |
| 542 | } |
| 543 | } |
| 544 | } |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | static int route4_dump(struct tcf_proto *tp, unsigned long fh, |
| 549 | struct sk_buff *skb, struct tcmsg *t) |
| 550 | { |
| 551 | struct route4_filter *f = (struct route4_filter*)fh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 552 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 553 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | u32 id; |
| 555 | |
| 556 | if (f == NULL) |
| 557 | return skb->len; |
| 558 | |
| 559 | t->tcm_handle = f->handle; |
| 560 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 561 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 562 | if (nest == NULL) |
| 563 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | if (!(f->handle&0x8000)) { |
| 566 | id = f->id&0xFF; |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 567 | NLA_PUT_U32(skb, TCA_ROUTE4_TO, id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | } |
| 569 | if (f->handle&0x80000000) { |
| 570 | if ((f->handle>>16) != 0xFFFF) |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 571 | NLA_PUT_U32(skb, TCA_ROUTE4_IIF, f->iif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } else { |
| 573 | id = f->id>>16; |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 574 | NLA_PUT_U32(skb, TCA_ROUTE4_FROM, id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | } |
| 576 | if (f->res.classid) |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 577 | NLA_PUT_U32(skb, TCA_ROUTE4_CLASSID, f->res.classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
| 579 | if (tcf_exts_dump(skb, &f->exts, &route_ext_map) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 580 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 582 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
| 584 | if (tcf_exts_dump_stats(skb, &f->exts, &route_ext_map) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 585 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | |
| 587 | return skb->len; |
| 588 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 589 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 590 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | return -1; |
| 592 | } |
| 593 | |
Patrick McHardy | 2eb9d75 | 2008-01-22 22:10:42 -0800 | [diff] [blame] | 594 | static struct tcf_proto_ops cls_route4_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | .kind = "route", |
| 596 | .classify = route4_classify, |
| 597 | .init = route4_init, |
| 598 | .destroy = route4_destroy, |
| 599 | .get = route4_get, |
| 600 | .put = route4_put, |
| 601 | .change = route4_change, |
| 602 | .delete = route4_delete, |
| 603 | .walk = route4_walk, |
| 604 | .dump = route4_dump, |
| 605 | .owner = THIS_MODULE, |
| 606 | }; |
| 607 | |
| 608 | static int __init init_route4(void) |
| 609 | { |
| 610 | return register_tcf_proto_ops(&cls_route4_ops); |
| 611 | } |
| 612 | |
| 613 | static void __exit exit_route4(void) |
| 614 | { |
| 615 | unregister_tcf_proto_ops(&cls_route4_ops); |
| 616 | } |
| 617 | |
| 618 | module_init(init_route4) |
| 619 | module_exit(exit_route4) |
| 620 | MODULE_LICENSE("GPL"); |