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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 13 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/types.h> |
| 15 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/skbuff.h> |
Patrick McHardy | 0ba4805 | 2007-07-02 22:49:07 -0700 | [diff] [blame] | 19 | #include <net/dst.h> |
| 20 | #include <net/route.h> |
| 21 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <net/act_api.h> |
| 23 | #include <net/pkt_cls.h> |
| 24 | |
| 25 | /* |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 26 | * 1. For now we assume that route tags < 256. |
| 27 | * It allows to use direct table lookups, instead of hash tables. |
| 28 | * 2. For now we assume that "from TAG" and "fromdev DEV" statements |
| 29 | * are mutually exclusive. |
| 30 | * 3. "to TAG from ANY" has higher priority, than "to ANY from XXX" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | */ |
| 32 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 33 | struct route4_fastmap { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | struct route4_filter *filter; |
| 35 | u32 id; |
| 36 | int iif; |
| 37 | }; |
| 38 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 39 | struct route4_head { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | struct route4_fastmap fastmap[16]; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 41 | struct route4_bucket *table[256 + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | }; |
| 43 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 44 | struct route4_bucket { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | /* 16 FROM buckets + 16 IIF buckets + 1 wildcard bucket */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 46 | struct route4_filter *ht[16 + 16 + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | }; |
| 48 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 49 | struct route4_filter { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | struct route4_filter *next; |
| 51 | u32 id; |
| 52 | int iif; |
| 53 | |
| 54 | struct tcf_result res; |
| 55 | struct tcf_exts exts; |
| 56 | u32 handle; |
| 57 | struct route4_bucket *bkt; |
| 58 | }; |
| 59 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 60 | #define ROUTE4_FAILURE ((struct route4_filter *)(-1L)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
Patrick McHardy | 5239008 | 2008-01-31 18:36:18 -0800 | [diff] [blame] | 62 | static const struct tcf_ext_map route_ext_map = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | .police = TCA_ROUTE4_POLICE, |
| 64 | .action = TCA_ROUTE4_ACT |
| 65 | }; |
| 66 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 67 | static inline int route4_fastmap_hash(u32 id, int iif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 69 | return id & 0xF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | } |
| 71 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 72 | static void |
| 73 | route4_reset_fastmap(struct Qdisc *q, struct route4_head *head, u32 id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | { |
Jarek Poplawski | 102396a | 2008-08-29 14:21:52 -0700 | [diff] [blame] | 75 | spinlock_t *root_lock = qdisc_root_sleeping_lock(q); |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame] | 76 | |
| 77 | spin_lock_bh(root_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | memset(head->fastmap, 0, sizeof(head->fastmap)); |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame] | 79 | spin_unlock_bh(root_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | } |
| 81 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 82 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | route4_set_fastmap(struct route4_head *head, u32 id, int iif, |
| 84 | struct route4_filter *f) |
| 85 | { |
| 86 | int h = route4_fastmap_hash(id, iif); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | head->fastmap[h].id = id; |
| 89 | head->fastmap[h].iif = iif; |
| 90 | head->fastmap[h].filter = f; |
| 91 | } |
| 92 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 93 | static inline int route4_hash_to(u32 id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 95 | return id & 0xFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 98 | static inline int route4_hash_from(u32 id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 100 | return (id >> 16) & 0xF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | } |
| 102 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 103 | static inline int route4_hash_iif(int iif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 105 | return 16 + ((iif >> 16) & 0xF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 108 | static inline int route4_hash_wild(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
| 110 | return 32; |
| 111 | } |
| 112 | |
| 113 | #define ROUTE4_APPLY_RESULT() \ |
| 114 | { \ |
| 115 | *res = f->res; \ |
| 116 | if (tcf_exts_is_available(&f->exts)) { \ |
| 117 | int r = tcf_exts_exec(skb, &f->exts, res); \ |
| 118 | if (r < 0) { \ |
| 119 | dont_cache = 1; \ |
| 120 | continue; \ |
| 121 | } \ |
| 122 | return r; \ |
| 123 | } else if (!dont_cache) \ |
| 124 | route4_set_fastmap(head, id, iif, f); \ |
| 125 | return 0; \ |
| 126 | } |
| 127 | |
| 128 | static int route4_classify(struct sk_buff *skb, struct tcf_proto *tp, |
| 129 | struct tcf_result *res) |
| 130 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 131 | struct route4_head *head = (struct route4_head *)tp->root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | struct dst_entry *dst; |
| 133 | struct route4_bucket *b; |
| 134 | struct route4_filter *f; |
| 135 | u32 id, h; |
| 136 | int iif, dont_cache = 0; |
| 137 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 138 | dst = skb_dst(skb); |
| 139 | if (!dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | goto failure; |
| 141 | |
| 142 | id = dst->tclassid; |
| 143 | if (head == NULL) |
| 144 | goto old_method; |
| 145 | |
David S. Miller | 5e2b61f | 2011-03-04 21:47:09 -0800 | [diff] [blame^] | 146 | iif = ((struct rtable *)dst)->rt_iif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | h = route4_fastmap_hash(id, iif); |
| 149 | if (id == head->fastmap[h].id && |
| 150 | iif == head->fastmap[h].iif && |
| 151 | (f = head->fastmap[h].filter) != NULL) { |
| 152 | if (f == ROUTE4_FAILURE) |
| 153 | goto failure; |
| 154 | |
| 155 | *res = f->res; |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | h = route4_hash_to(id); |
| 160 | |
| 161 | restart: |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 162 | b = head->table[h]; |
| 163 | if (b) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 199 | u32 h = id & 0xFF; |
| 200 | |
| 201 | if (id & 0x8000) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | h += 256; |
| 203 | return h; |
| 204 | } |
| 205 | |
| 206 | static inline u32 from_hash(u32 id) |
| 207 | { |
| 208 | id &= 0xFFFF; |
| 209 | if (id == 0xFFFF) |
| 210 | return 32; |
| 211 | if (!(id & 0x8000)) { |
| 212 | if (id > 255) |
| 213 | return 256; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 214 | return id & 0xF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 216 | return 16 + (id & 0xF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | static unsigned long route4_get(struct tcf_proto *tp, u32 handle) |
| 220 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 221 | struct route4_head *head = (struct route4_head *)tp->root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | struct route4_bucket *b; |
| 223 | struct route4_filter *f; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 224 | unsigned int h1, h2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | if (!head) |
| 227 | return 0; |
| 228 | |
| 229 | h1 = to_hash(handle); |
| 230 | if (h1 > 256) |
| 231 | return 0; |
| 232 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 233 | h2 = from_hash(handle >> 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | if (h2 > 32) |
| 235 | return 0; |
| 236 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 237 | b = head->table[h1]; |
| 238 | if (b) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | for (f = b->ht[h2]; f; f = f->next) |
| 240 | if (f->handle == handle) |
| 241 | return (unsigned long)f; |
| 242 | } |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static void route4_put(struct tcf_proto *tp, unsigned long f) |
| 247 | { |
| 248 | } |
| 249 | |
| 250 | static int route4_init(struct tcf_proto *tp) |
| 251 | { |
| 252 | return 0; |
| 253 | } |
| 254 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 255 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | route4_delete_filter(struct tcf_proto *tp, struct route4_filter *f) |
| 257 | { |
| 258 | tcf_unbind_filter(tp, &f->res); |
| 259 | tcf_exts_destroy(tp, &f->exts); |
| 260 | kfree(f); |
| 261 | } |
| 262 | |
| 263 | static void route4_destroy(struct tcf_proto *tp) |
| 264 | { |
Patrick McHardy | 47a1a1d | 2008-11-19 08:03:09 +0000 | [diff] [blame] | 265 | struct route4_head *head = tp->root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | int h1, h2; |
| 267 | |
| 268 | if (head == NULL) |
| 269 | return; |
| 270 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 271 | for (h1 = 0; h1 <= 256; h1++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | struct route4_bucket *b; |
| 273 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 274 | b = head->table[h1]; |
| 275 | if (b) { |
| 276 | for (h2 = 0; h2 <= 32; h2++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | struct route4_filter *f; |
| 278 | |
| 279 | while ((f = b->ht[h2]) != NULL) { |
| 280 | b->ht[h2] = f->next; |
| 281 | route4_delete_filter(tp, f); |
| 282 | } |
| 283 | } |
| 284 | kfree(b); |
| 285 | } |
| 286 | } |
| 287 | kfree(head); |
| 288 | } |
| 289 | |
| 290 | static int route4_delete(struct tcf_proto *tp, unsigned long arg) |
| 291 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 292 | struct route4_head *head = (struct route4_head *)tp->root; |
| 293 | struct route4_filter **fp, *f = (struct route4_filter *)arg; |
| 294 | unsigned int h = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | struct route4_bucket *b; |
| 296 | int i; |
| 297 | |
| 298 | if (!head || !f) |
| 299 | return -EINVAL; |
| 300 | |
| 301 | h = f->handle; |
| 302 | b = f->bkt; |
| 303 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 304 | for (fp = &b->ht[from_hash(h >> 16)]; *fp; fp = &(*fp)->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | if (*fp == f) { |
| 306 | tcf_tree_lock(tp); |
| 307 | *fp = f->next; |
| 308 | tcf_tree_unlock(tp); |
| 309 | |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame] | 310 | route4_reset_fastmap(tp->q, head, f->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | route4_delete_filter(tp, f); |
| 312 | |
| 313 | /* Strip tree */ |
| 314 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 315 | for (i = 0; i <= 32; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | if (b->ht[i]) |
| 317 | return 0; |
| 318 | |
| 319 | /* OK, session has no flows */ |
| 320 | tcf_tree_lock(tp); |
| 321 | head->table[to_hash(h)] = NULL; |
| 322 | tcf_tree_unlock(tp); |
| 323 | |
| 324 | kfree(b); |
| 325 | return 0; |
| 326 | } |
| 327 | } |
| 328 | return 0; |
| 329 | } |
| 330 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 331 | static const struct nla_policy route4_policy[TCA_ROUTE4_MAX + 1] = { |
| 332 | [TCA_ROUTE4_CLASSID] = { .type = NLA_U32 }, |
| 333 | [TCA_ROUTE4_TO] = { .type = NLA_U32 }, |
| 334 | [TCA_ROUTE4_FROM] = { .type = NLA_U32 }, |
| 335 | [TCA_ROUTE4_IIF] = { .type = NLA_U32 }, |
| 336 | }; |
| 337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | static int route4_set_parms(struct tcf_proto *tp, unsigned long base, |
| 339 | struct route4_filter *f, u32 handle, struct route4_head *head, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 340 | struct nlattr **tb, struct nlattr *est, int new) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | { |
| 342 | int err; |
| 343 | u32 id = 0, to = 0, nhandle = 0x8000; |
| 344 | struct route4_filter *fp; |
| 345 | unsigned int h1; |
| 346 | struct route4_bucket *b; |
| 347 | struct tcf_exts e; |
| 348 | |
| 349 | err = tcf_exts_validate(tp, tb, est, &e, &route_ext_map); |
| 350 | if (err < 0) |
| 351 | return err; |
| 352 | |
| 353 | err = -EINVAL; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 354 | if (tb[TCA_ROUTE4_TO]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | if (new && handle & 0x8000) |
| 356 | goto errout; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 357 | to = nla_get_u32(tb[TCA_ROUTE4_TO]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | if (to > 0xFF) |
| 359 | goto errout; |
| 360 | nhandle = to; |
| 361 | } |
| 362 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 363 | if (tb[TCA_ROUTE4_FROM]) { |
| 364 | if (tb[TCA_ROUTE4_IIF]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | goto errout; |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 366 | id = nla_get_u32(tb[TCA_ROUTE4_FROM]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | if (id > 0xFF) |
| 368 | goto errout; |
| 369 | nhandle |= id << 16; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 370 | } else if (tb[TCA_ROUTE4_IIF]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 371 | id = nla_get_u32(tb[TCA_ROUTE4_IIF]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | if (id > 0x7FFF) |
| 373 | goto errout; |
| 374 | nhandle |= (id | 0x8000) << 16; |
| 375 | } else |
| 376 | nhandle |= 0xFFFF << 16; |
| 377 | |
| 378 | if (handle && new) { |
| 379 | nhandle |= handle & 0x7F00; |
| 380 | if (nhandle != handle) |
| 381 | goto errout; |
| 382 | } |
| 383 | |
| 384 | h1 = to_hash(nhandle); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 385 | b = head->table[h1]; |
| 386 | if (!b) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | err = -ENOBUFS; |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 388 | b = kzalloc(sizeof(struct route4_bucket), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | if (b == NULL) |
| 390 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
| 392 | tcf_tree_lock(tp); |
| 393 | head->table[h1] = b; |
| 394 | tcf_tree_unlock(tp); |
| 395 | } else { |
| 396 | unsigned int h2 = from_hash(nhandle >> 16); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 397 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | err = -EEXIST; |
| 399 | for (fp = b->ht[h2]; fp; fp = fp->next) |
| 400 | if (fp->handle == f->handle) |
| 401 | goto errout; |
| 402 | } |
| 403 | |
| 404 | tcf_tree_lock(tp); |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 405 | if (tb[TCA_ROUTE4_TO]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | f->id = to; |
| 407 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 408 | if (tb[TCA_ROUTE4_FROM]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | f->id = to | id<<16; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 410 | else if (tb[TCA_ROUTE4_IIF]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | f->iif = id; |
| 412 | |
| 413 | f->handle = nhandle; |
| 414 | f->bkt = b; |
| 415 | tcf_tree_unlock(tp); |
| 416 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 417 | if (tb[TCA_ROUTE4_CLASSID]) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 418 | f->res.classid = nla_get_u32(tb[TCA_ROUTE4_CLASSID]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | tcf_bind_filter(tp, &f->res, base); |
| 420 | } |
| 421 | |
| 422 | tcf_exts_change(tp, &f->exts, &e); |
| 423 | |
| 424 | return 0; |
| 425 | errout: |
| 426 | tcf_exts_destroy(tp, &e); |
| 427 | return err; |
| 428 | } |
| 429 | |
| 430 | static int route4_change(struct tcf_proto *tp, unsigned long base, |
| 431 | u32 handle, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 432 | struct nlattr **tca, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | unsigned long *arg) |
| 434 | { |
| 435 | struct route4_head *head = tp->root; |
| 436 | struct route4_filter *f, *f1, **fp; |
| 437 | struct route4_bucket *b; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 438 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 439 | struct nlattr *tb[TCA_ROUTE4_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | unsigned int h, th; |
| 441 | u32 old_handle = 0; |
| 442 | int err; |
| 443 | |
| 444 | if (opt == NULL) |
| 445 | return handle ? -EINVAL : 0; |
| 446 | |
Patrick McHardy | 6fa8c01 | 2008-01-23 20:36:12 -0800 | [diff] [blame] | 447 | err = nla_parse_nested(tb, TCA_ROUTE4_MAX, opt, route4_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 448 | if (err < 0) |
| 449 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 451 | f = (struct route4_filter *)*arg; |
| 452 | if (f) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (f->handle != handle && handle) |
| 454 | return -EINVAL; |
| 455 | |
| 456 | if (f->bkt) |
| 457 | old_handle = f->handle; |
| 458 | |
| 459 | err = route4_set_parms(tp, base, f, handle, head, tb, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 460 | tca[TCA_RATE], 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | if (err < 0) |
| 462 | return err; |
| 463 | |
| 464 | goto reinsert; |
| 465 | } |
| 466 | |
| 467 | err = -ENOBUFS; |
| 468 | if (head == NULL) { |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 469 | head = kzalloc(sizeof(struct route4_head), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | if (head == NULL) |
| 471 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
| 473 | tcf_tree_lock(tp); |
| 474 | tp->root = head; |
| 475 | tcf_tree_unlock(tp); |
| 476 | } |
| 477 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 478 | f = kzalloc(sizeof(struct route4_filter), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | if (f == NULL) |
| 480 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
| 482 | err = route4_set_parms(tp, base, f, handle, head, tb, |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 483 | tca[TCA_RATE], 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | if (err < 0) |
| 485 | goto errout; |
| 486 | |
| 487 | reinsert: |
| 488 | h = from_hash(f->handle >> 16); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 489 | for (fp = &f->bkt->ht[h]; (f1 = *fp) != NULL; fp = &f1->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | if (f->handle < f1->handle) |
| 491 | break; |
| 492 | |
| 493 | f->next = f1; |
| 494 | tcf_tree_lock(tp); |
| 495 | *fp = f; |
| 496 | |
| 497 | if (old_handle && f->handle != old_handle) { |
| 498 | th = to_hash(old_handle); |
| 499 | h = from_hash(old_handle >> 16); |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 500 | b = head->table[th]; |
| 501 | if (b) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | for (fp = &b->ht[h]; *fp; fp = &(*fp)->next) { |
| 503 | if (*fp == f) { |
| 504 | *fp = f->next; |
| 505 | break; |
| 506 | } |
| 507 | } |
| 508 | } |
| 509 | } |
| 510 | tcf_tree_unlock(tp); |
| 511 | |
David S. Miller | 15b458f | 2008-07-16 02:42:51 -0700 | [diff] [blame] | 512 | route4_reset_fastmap(tp->q, head, f->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | *arg = (unsigned long)f; |
| 514 | return 0; |
| 515 | |
| 516 | errout: |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 517 | kfree(f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | return err; |
| 519 | } |
| 520 | |
| 521 | static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| 522 | { |
| 523 | struct route4_head *head = tp->root; |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 524 | unsigned int h, h1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | if (head == NULL) |
| 527 | arg->stop = 1; |
| 528 | |
| 529 | if (arg->stop) |
| 530 | return; |
| 531 | |
| 532 | for (h = 0; h <= 256; h++) { |
| 533 | struct route4_bucket *b = head->table[h]; |
| 534 | |
| 535 | if (b) { |
| 536 | for (h1 = 0; h1 <= 32; h1++) { |
| 537 | struct route4_filter *f; |
| 538 | |
| 539 | for (f = b->ht[h1]; f; f = f->next) { |
| 540 | if (arg->count < arg->skip) { |
| 541 | arg->count++; |
| 542 | continue; |
| 543 | } |
| 544 | if (arg->fn(tp, (unsigned long)f, arg) < 0) { |
| 545 | arg->stop = 1; |
| 546 | return; |
| 547 | } |
| 548 | arg->count++; |
| 549 | } |
| 550 | } |
| 551 | } |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | static int route4_dump(struct tcf_proto *tp, unsigned long fh, |
| 556 | struct sk_buff *skb, struct tcmsg *t) |
| 557 | { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 558 | struct route4_filter *f = (struct route4_filter *)fh; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 559 | unsigned char *b = skb_tail_pointer(skb); |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 560 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | u32 id; |
| 562 | |
| 563 | if (f == NULL) |
| 564 | return skb->len; |
| 565 | |
| 566 | t->tcm_handle = f->handle; |
| 567 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 568 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 569 | if (nest == NULL) |
| 570 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 572 | if (!(f->handle & 0x8000)) { |
| 573 | id = f->id & 0xFF; |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 574 | NLA_PUT_U32(skb, TCA_ROUTE4_TO, id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | } |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 576 | if (f->handle & 0x80000000) { |
| 577 | if ((f->handle >> 16) != 0xFFFF) |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 578 | NLA_PUT_U32(skb, TCA_ROUTE4_IIF, f->iif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | } else { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 580 | id = f->id >> 16; |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 581 | NLA_PUT_U32(skb, TCA_ROUTE4_FROM, id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | } |
| 583 | if (f->res.classid) |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 584 | NLA_PUT_U32(skb, TCA_ROUTE4_CLASSID, f->res.classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | |
| 586 | if (tcf_exts_dump(skb, &f->exts, &route_ext_map) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 587 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 589 | nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
| 591 | if (tcf_exts_dump_stats(skb, &f->exts, &route_ext_map) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 592 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | return skb->len; |
| 595 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 596 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 597 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | return -1; |
| 599 | } |
| 600 | |
Patrick McHardy | 2eb9d75 | 2008-01-22 22:10:42 -0800 | [diff] [blame] | 601 | static struct tcf_proto_ops cls_route4_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | .kind = "route", |
| 603 | .classify = route4_classify, |
| 604 | .init = route4_init, |
| 605 | .destroy = route4_destroy, |
| 606 | .get = route4_get, |
| 607 | .put = route4_put, |
| 608 | .change = route4_change, |
| 609 | .delete = route4_delete, |
| 610 | .walk = route4_walk, |
| 611 | .dump = route4_dump, |
| 612 | .owner = THIS_MODULE, |
| 613 | }; |
| 614 | |
| 615 | static int __init init_route4(void) |
| 616 | { |
| 617 | return register_tcf_proto_ops(&cls_route4_ops); |
| 618 | } |
| 619 | |
| 620 | static void __exit exit_route4(void) |
| 621 | { |
| 622 | unregister_tcf_proto_ops(&cls_route4_ops); |
| 623 | } |
| 624 | |
| 625 | module_init(init_route4) |
| 626 | module_exit(exit_route4) |
| 627 | MODULE_LICENSE("GPL"); |