Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/sched/em_meta.c Metadata ematch |
| 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: Thomas Graf <tgraf@suug.ch> |
| 10 | * |
| 11 | * ========================================================================== |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 12 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * The metadata ematch compares two meta objects where each object |
| 14 | * represents either a meta value stored in the kernel or a static |
| 15 | * value provided by userspace. The objects are not provided by |
| 16 | * userspace itself but rather a definition providing the information |
| 17 | * to build them. Every object is of a certain type which must be |
| 18 | * equal to the object it is being compared to. |
| 19 | * |
| 20 | * The definition of a objects conists of the type (meta type), a |
| 21 | * identifier (meta id) and additional type specific information. |
| 22 | * The meta id is either TCF_META_TYPE_VALUE for values provided by |
| 23 | * userspace or a index to the meta operations table consisting of |
| 24 | * function pointers to type specific meta data collectors returning |
| 25 | * the value of the requested meta value. |
| 26 | * |
| 27 | * lvalue rvalue |
| 28 | * +-----------+ +-----------+ |
| 29 | * | type: INT | | type: INT | |
David S. Miller | 261688d | 2005-07-22 14:43:52 -0700 | [diff] [blame] | 30 | * def | id: DEV | | id: VALUE | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | * | data: | | data: 3 | |
| 32 | * +-----------+ +-----------+ |
| 33 | * | | |
David S. Miller | 261688d | 2005-07-22 14:43:52 -0700 | [diff] [blame] | 34 | * ---> meta_ops[INT][DEV](...) | |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 35 | * | | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | * ----------- | |
| 37 | * V V |
| 38 | * +-----------+ +-----------+ |
| 39 | * | type: INT | | type: INT | |
David S. Miller | 261688d | 2005-07-22 14:43:52 -0700 | [diff] [blame] | 40 | * obj | id: DEV | | id: VALUE | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | * | data: 2 |<--data got filled out | data: 3 | |
| 42 | * +-----------+ +-----------+ |
| 43 | * | | |
| 44 | * --------------> 2 equals 3 <-------------- |
| 45 | * |
| 46 | * This is a simplified schema, the complexity varies depending |
| 47 | * on the meta type. Obviously, the length of the data must also |
| 48 | * be provided for non-numeric types. |
| 49 | * |
| 50 | * Additionaly, type dependant modifiers such as shift operators |
| 51 | * or mask may be applied to extend the functionaliy. As of now, |
| 52 | * the variable length type supports shifting the byte string to |
| 53 | * the right, eating up any number of octets and thus supporting |
| 54 | * wildcard interface name comparisons such as "ppp%" matching |
| 55 | * ppp0..9. |
| 56 | * |
| 57 | * NOTE: Certain meta values depend on other subsystems and are |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 58 | * only available if that subsystem is enabled in the kernel. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | */ |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/module.h> |
| 62 | #include <linux/types.h> |
| 63 | #include <linux/kernel.h> |
| 64 | #include <linux/sched.h> |
| 65 | #include <linux/string.h> |
| 66 | #include <linux/skbuff.h> |
| 67 | #include <linux/random.h> |
Stephen Hemminger | 3113e88 | 2008-02-05 03:20:13 -0800 | [diff] [blame] | 68 | #include <linux/if_vlan.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #include <linux/tc_ematch/tc_em_meta.h> |
| 70 | #include <net/dst.h> |
| 71 | #include <net/route.h> |
| 72 | #include <net/pkt_cls.h> |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 73 | #include <net/sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | struct meta_obj |
| 76 | { |
| 77 | unsigned long value; |
| 78 | unsigned int len; |
| 79 | }; |
| 80 | |
| 81 | struct meta_value |
| 82 | { |
| 83 | struct tcf_meta_val hdr; |
| 84 | unsigned long val; |
| 85 | unsigned int len; |
| 86 | }; |
| 87 | |
| 88 | struct meta_match |
| 89 | { |
| 90 | struct meta_value lvalue; |
| 91 | struct meta_value rvalue; |
| 92 | }; |
| 93 | |
| 94 | static inline int meta_id(struct meta_value *v) |
| 95 | { |
| 96 | return TCF_META_ID(v->hdr.kind); |
| 97 | } |
| 98 | |
| 99 | static inline int meta_type(struct meta_value *v) |
| 100 | { |
| 101 | return TCF_META_TYPE(v->hdr.kind); |
| 102 | } |
| 103 | |
| 104 | #define META_COLLECTOR(FUNC) static void meta_##FUNC(struct sk_buff *skb, \ |
| 105 | struct tcf_pkt_info *info, struct meta_value *v, \ |
| 106 | struct meta_obj *dst, int *err) |
| 107 | |
| 108 | /************************************************************************** |
| 109 | * System status & misc |
| 110 | **************************************************************************/ |
| 111 | |
| 112 | META_COLLECTOR(int_random) |
| 113 | { |
| 114 | get_random_bytes(&dst->value, sizeof(dst->value)); |
| 115 | } |
| 116 | |
| 117 | static inline unsigned long fixed_loadavg(int load) |
| 118 | { |
| 119 | int rnd_load = load + (FIXED_1/200); |
| 120 | int rnd_frac = ((rnd_load & (FIXED_1-1)) * 100) >> FSHIFT; |
| 121 | |
| 122 | return ((rnd_load >> FSHIFT) * 100) + rnd_frac; |
| 123 | } |
| 124 | |
| 125 | META_COLLECTOR(int_loadavg_0) |
| 126 | { |
| 127 | dst->value = fixed_loadavg(avenrun[0]); |
| 128 | } |
| 129 | |
| 130 | META_COLLECTOR(int_loadavg_1) |
| 131 | { |
| 132 | dst->value = fixed_loadavg(avenrun[1]); |
| 133 | } |
| 134 | |
| 135 | META_COLLECTOR(int_loadavg_2) |
| 136 | { |
| 137 | dst->value = fixed_loadavg(avenrun[2]); |
| 138 | } |
| 139 | |
| 140 | /************************************************************************** |
| 141 | * Device names & indices |
| 142 | **************************************************************************/ |
| 143 | |
| 144 | static inline int int_dev(struct net_device *dev, struct meta_obj *dst) |
| 145 | { |
| 146 | if (unlikely(dev == NULL)) |
| 147 | return -1; |
| 148 | |
| 149 | dst->value = dev->ifindex; |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static inline int var_dev(struct net_device *dev, struct meta_obj *dst) |
| 154 | { |
| 155 | if (unlikely(dev == NULL)) |
| 156 | return -1; |
| 157 | |
| 158 | dst->value = (unsigned long) dev->name; |
| 159 | dst->len = strlen(dev->name); |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | META_COLLECTOR(int_dev) |
| 164 | { |
| 165 | *err = int_dev(skb->dev, dst); |
| 166 | } |
| 167 | |
| 168 | META_COLLECTOR(var_dev) |
| 169 | { |
| 170 | *err = var_dev(skb->dev, dst); |
| 171 | } |
| 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | /************************************************************************** |
Stephen Hemminger | 3113e88 | 2008-02-05 03:20:13 -0800 | [diff] [blame] | 174 | * vlan tag |
| 175 | **************************************************************************/ |
| 176 | |
| 177 | META_COLLECTOR(int_vlan_tag) |
| 178 | { |
Stephen Hemminger | 1a31f20 | 2009-04-13 18:12:57 -0700 | [diff] [blame] | 179 | unsigned short tag; |
| 180 | |
| 181 | tag = vlan_tx_tag_get(skb); |
| 182 | if (!tag && __vlan_get_tag(skb, &tag)) |
Stephen Hemminger | 3113e88 | 2008-02-05 03:20:13 -0800 | [diff] [blame] | 183 | *err = -1; |
| 184 | else |
| 185 | dst->value = tag; |
| 186 | } |
| 187 | |
| 188 | |
| 189 | |
| 190 | /************************************************************************** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | * skb attributes |
| 192 | **************************************************************************/ |
| 193 | |
| 194 | META_COLLECTOR(int_priority) |
| 195 | { |
| 196 | dst->value = skb->priority; |
| 197 | } |
| 198 | |
| 199 | META_COLLECTOR(int_protocol) |
| 200 | { |
| 201 | /* Let userspace take care of the byte ordering */ |
| 202 | dst->value = skb->protocol; |
| 203 | } |
| 204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | META_COLLECTOR(int_pkttype) |
| 206 | { |
| 207 | dst->value = skb->pkt_type; |
| 208 | } |
| 209 | |
| 210 | META_COLLECTOR(int_pktlen) |
| 211 | { |
| 212 | dst->value = skb->len; |
| 213 | } |
| 214 | |
| 215 | META_COLLECTOR(int_datalen) |
| 216 | { |
| 217 | dst->value = skb->data_len; |
| 218 | } |
| 219 | |
| 220 | META_COLLECTOR(int_maclen) |
| 221 | { |
| 222 | dst->value = skb->mac_len; |
| 223 | } |
| 224 | |
| 225 | /************************************************************************** |
| 226 | * Netfilter |
| 227 | **************************************************************************/ |
| 228 | |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 229 | META_COLLECTOR(int_mark) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | { |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 231 | dst->value = skb->mark; |
Patrick McHardy | 7686ee1 | 2005-07-24 19:44:23 -0700 | [diff] [blame] | 232 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | /************************************************************************** |
| 235 | * Traffic Control |
| 236 | **************************************************************************/ |
| 237 | |
| 238 | META_COLLECTOR(int_tcindex) |
| 239 | { |
| 240 | dst->value = skb->tc_index; |
| 241 | } |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | /************************************************************************** |
| 244 | * Routing |
| 245 | **************************************************************************/ |
| 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | META_COLLECTOR(int_rtclassid) |
| 248 | { |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 249 | if (unlikely(skb_dst(skb) == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | *err = -1; |
| 251 | else |
Patrick McHardy | 7686ee1 | 2005-07-24 19:44:23 -0700 | [diff] [blame] | 252 | #ifdef CONFIG_NET_CLS_ROUTE |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 253 | dst->value = skb_dst(skb)->tclassid; |
Patrick McHardy | 7686ee1 | 2005-07-24 19:44:23 -0700 | [diff] [blame] | 254 | #else |
| 255 | dst->value = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | #endif |
Patrick McHardy | 7686ee1 | 2005-07-24 19:44:23 -0700 | [diff] [blame] | 257 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
| 259 | META_COLLECTOR(int_rtiif) |
| 260 | { |
Eric Dumazet | 511c3f9 | 2009-06-02 05:14:27 +0000 | [diff] [blame] | 261 | if (unlikely(skb_rtable(skb) == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | *err = -1; |
| 263 | else |
Eric Dumazet | 511c3f9 | 2009-06-02 05:14:27 +0000 | [diff] [blame] | 264 | dst->value = skb_rtable(skb)->fl.iif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | /************************************************************************** |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 268 | * Socket Attributes |
| 269 | **************************************************************************/ |
| 270 | |
| 271 | #define SKIP_NONLOCAL(skb) \ |
| 272 | if (unlikely(skb->sk == NULL)) { \ |
| 273 | *err = -1; \ |
| 274 | return; \ |
| 275 | } |
| 276 | |
| 277 | META_COLLECTOR(int_sk_family) |
| 278 | { |
| 279 | SKIP_NONLOCAL(skb); |
| 280 | dst->value = skb->sk->sk_family; |
| 281 | } |
| 282 | |
| 283 | META_COLLECTOR(int_sk_state) |
| 284 | { |
| 285 | SKIP_NONLOCAL(skb); |
| 286 | dst->value = skb->sk->sk_state; |
| 287 | } |
| 288 | |
| 289 | META_COLLECTOR(int_sk_reuse) |
| 290 | { |
| 291 | SKIP_NONLOCAL(skb); |
| 292 | dst->value = skb->sk->sk_reuse; |
| 293 | } |
| 294 | |
| 295 | META_COLLECTOR(int_sk_bound_if) |
| 296 | { |
| 297 | SKIP_NONLOCAL(skb); |
| 298 | /* No error if bound_dev_if is 0, legal userspace check */ |
| 299 | dst->value = skb->sk->sk_bound_dev_if; |
| 300 | } |
| 301 | |
| 302 | META_COLLECTOR(var_sk_bound_if) |
| 303 | { |
| 304 | SKIP_NONLOCAL(skb); |
| 305 | |
| 306 | if (skb->sk->sk_bound_dev_if == 0) { |
| 307 | dst->value = (unsigned long) "any"; |
| 308 | dst->len = 3; |
| 309 | } else { |
| 310 | struct net_device *dev; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 311 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 312 | dev = dev_get_by_index(&init_net, skb->sk->sk_bound_dev_if); |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 313 | *err = var_dev(dev, dst); |
| 314 | if (dev) |
| 315 | dev_put(dev); |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | META_COLLECTOR(int_sk_refcnt) |
| 320 | { |
| 321 | SKIP_NONLOCAL(skb); |
| 322 | dst->value = atomic_read(&skb->sk->sk_refcnt); |
| 323 | } |
| 324 | |
| 325 | META_COLLECTOR(int_sk_rcvbuf) |
| 326 | { |
| 327 | SKIP_NONLOCAL(skb); |
| 328 | dst->value = skb->sk->sk_rcvbuf; |
| 329 | } |
| 330 | |
| 331 | META_COLLECTOR(int_sk_shutdown) |
| 332 | { |
| 333 | SKIP_NONLOCAL(skb); |
| 334 | dst->value = skb->sk->sk_shutdown; |
| 335 | } |
| 336 | |
| 337 | META_COLLECTOR(int_sk_proto) |
| 338 | { |
| 339 | SKIP_NONLOCAL(skb); |
| 340 | dst->value = skb->sk->sk_protocol; |
| 341 | } |
| 342 | |
| 343 | META_COLLECTOR(int_sk_type) |
| 344 | { |
| 345 | SKIP_NONLOCAL(skb); |
| 346 | dst->value = skb->sk->sk_type; |
| 347 | } |
| 348 | |
| 349 | META_COLLECTOR(int_sk_rmem_alloc) |
| 350 | { |
| 351 | SKIP_NONLOCAL(skb); |
| 352 | dst->value = atomic_read(&skb->sk->sk_rmem_alloc); |
| 353 | } |
| 354 | |
| 355 | META_COLLECTOR(int_sk_wmem_alloc) |
| 356 | { |
| 357 | SKIP_NONLOCAL(skb); |
| 358 | dst->value = atomic_read(&skb->sk->sk_wmem_alloc); |
| 359 | } |
| 360 | |
| 361 | META_COLLECTOR(int_sk_omem_alloc) |
| 362 | { |
| 363 | SKIP_NONLOCAL(skb); |
| 364 | dst->value = atomic_read(&skb->sk->sk_omem_alloc); |
| 365 | } |
| 366 | |
| 367 | META_COLLECTOR(int_sk_rcv_qlen) |
| 368 | { |
| 369 | SKIP_NONLOCAL(skb); |
| 370 | dst->value = skb->sk->sk_receive_queue.qlen; |
| 371 | } |
| 372 | |
| 373 | META_COLLECTOR(int_sk_snd_qlen) |
| 374 | { |
| 375 | SKIP_NONLOCAL(skb); |
| 376 | dst->value = skb->sk->sk_write_queue.qlen; |
| 377 | } |
| 378 | |
| 379 | META_COLLECTOR(int_sk_wmem_queued) |
| 380 | { |
| 381 | SKIP_NONLOCAL(skb); |
| 382 | dst->value = skb->sk->sk_wmem_queued; |
| 383 | } |
| 384 | |
| 385 | META_COLLECTOR(int_sk_fwd_alloc) |
| 386 | { |
| 387 | SKIP_NONLOCAL(skb); |
| 388 | dst->value = skb->sk->sk_forward_alloc; |
| 389 | } |
| 390 | |
| 391 | META_COLLECTOR(int_sk_sndbuf) |
| 392 | { |
| 393 | SKIP_NONLOCAL(skb); |
| 394 | dst->value = skb->sk->sk_sndbuf; |
| 395 | } |
| 396 | |
| 397 | META_COLLECTOR(int_sk_alloc) |
| 398 | { |
| 399 | SKIP_NONLOCAL(skb); |
| 400 | dst->value = skb->sk->sk_allocation; |
| 401 | } |
| 402 | |
| 403 | META_COLLECTOR(int_sk_route_caps) |
| 404 | { |
| 405 | SKIP_NONLOCAL(skb); |
| 406 | dst->value = skb->sk->sk_route_caps; |
| 407 | } |
| 408 | |
Eric Dumazet | 81c3d54 | 2005-10-03 14:13:38 -0700 | [diff] [blame] | 409 | META_COLLECTOR(int_sk_hash) |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 410 | { |
| 411 | SKIP_NONLOCAL(skb); |
Eric Dumazet | 81c3d54 | 2005-10-03 14:13:38 -0700 | [diff] [blame] | 412 | dst->value = skb->sk->sk_hash; |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | META_COLLECTOR(int_sk_lingertime) |
| 416 | { |
| 417 | SKIP_NONLOCAL(skb); |
| 418 | dst->value = skb->sk->sk_lingertime / HZ; |
| 419 | } |
| 420 | |
| 421 | META_COLLECTOR(int_sk_err_qlen) |
| 422 | { |
| 423 | SKIP_NONLOCAL(skb); |
| 424 | dst->value = skb->sk->sk_error_queue.qlen; |
| 425 | } |
| 426 | |
| 427 | META_COLLECTOR(int_sk_ack_bl) |
| 428 | { |
| 429 | SKIP_NONLOCAL(skb); |
| 430 | dst->value = skb->sk->sk_ack_backlog; |
| 431 | } |
| 432 | |
| 433 | META_COLLECTOR(int_sk_max_ack_bl) |
| 434 | { |
| 435 | SKIP_NONLOCAL(skb); |
| 436 | dst->value = skb->sk->sk_max_ack_backlog; |
| 437 | } |
| 438 | |
| 439 | META_COLLECTOR(int_sk_prio) |
| 440 | { |
| 441 | SKIP_NONLOCAL(skb); |
| 442 | dst->value = skb->sk->sk_priority; |
| 443 | } |
| 444 | |
| 445 | META_COLLECTOR(int_sk_rcvlowat) |
| 446 | { |
| 447 | SKIP_NONLOCAL(skb); |
| 448 | dst->value = skb->sk->sk_rcvlowat; |
| 449 | } |
| 450 | |
| 451 | META_COLLECTOR(int_sk_rcvtimeo) |
| 452 | { |
| 453 | SKIP_NONLOCAL(skb); |
| 454 | dst->value = skb->sk->sk_rcvtimeo / HZ; |
| 455 | } |
| 456 | |
| 457 | META_COLLECTOR(int_sk_sndtimeo) |
| 458 | { |
| 459 | SKIP_NONLOCAL(skb); |
| 460 | dst->value = skb->sk->sk_sndtimeo / HZ; |
| 461 | } |
| 462 | |
| 463 | META_COLLECTOR(int_sk_sendmsg_off) |
| 464 | { |
| 465 | SKIP_NONLOCAL(skb); |
| 466 | dst->value = skb->sk->sk_sndmsg_off; |
| 467 | } |
| 468 | |
| 469 | META_COLLECTOR(int_sk_write_pend) |
| 470 | { |
| 471 | SKIP_NONLOCAL(skb); |
| 472 | dst->value = skb->sk->sk_write_pending; |
| 473 | } |
| 474 | |
| 475 | /************************************************************************** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | * Meta value collectors assignment table |
| 477 | **************************************************************************/ |
| 478 | |
| 479 | struct meta_ops |
| 480 | { |
| 481 | void (*get)(struct sk_buff *, struct tcf_pkt_info *, |
| 482 | struct meta_value *, struct meta_obj *, int *); |
| 483 | }; |
| 484 | |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 485 | #define META_ID(name) TCF_META_ID_##name |
| 486 | #define META_FUNC(name) { .get = meta_##name } |
| 487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | /* Meta value operations table listing all meta value collectors and |
| 489 | * assigns them to a type and meta id. */ |
| 490 | static struct meta_ops __meta_ops[TCF_META_TYPE_MAX+1][TCF_META_ID_MAX+1] = { |
| 491 | [TCF_META_TYPE_VAR] = { |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 492 | [META_ID(DEV)] = META_FUNC(var_dev), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 493 | [META_ID(SK_BOUND_IF)] = META_FUNC(var_sk_bound_if), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | }, |
| 495 | [TCF_META_TYPE_INT] = { |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 496 | [META_ID(RANDOM)] = META_FUNC(int_random), |
| 497 | [META_ID(LOADAVG_0)] = META_FUNC(int_loadavg_0), |
| 498 | [META_ID(LOADAVG_1)] = META_FUNC(int_loadavg_1), |
| 499 | [META_ID(LOADAVG_2)] = META_FUNC(int_loadavg_2), |
| 500 | [META_ID(DEV)] = META_FUNC(int_dev), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 501 | [META_ID(PRIORITY)] = META_FUNC(int_priority), |
| 502 | [META_ID(PROTOCOL)] = META_FUNC(int_protocol), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 503 | [META_ID(PKTTYPE)] = META_FUNC(int_pkttype), |
| 504 | [META_ID(PKTLEN)] = META_FUNC(int_pktlen), |
| 505 | [META_ID(DATALEN)] = META_FUNC(int_datalen), |
| 506 | [META_ID(MACLEN)] = META_FUNC(int_maclen), |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 507 | [META_ID(NFMARK)] = META_FUNC(int_mark), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 508 | [META_ID(TCINDEX)] = META_FUNC(int_tcindex), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 509 | [META_ID(RTCLASSID)] = META_FUNC(int_rtclassid), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 510 | [META_ID(RTIIF)] = META_FUNC(int_rtiif), |
| 511 | [META_ID(SK_FAMILY)] = META_FUNC(int_sk_family), |
| 512 | [META_ID(SK_STATE)] = META_FUNC(int_sk_state), |
| 513 | [META_ID(SK_REUSE)] = META_FUNC(int_sk_reuse), |
| 514 | [META_ID(SK_BOUND_IF)] = META_FUNC(int_sk_bound_if), |
| 515 | [META_ID(SK_REFCNT)] = META_FUNC(int_sk_refcnt), |
| 516 | [META_ID(SK_RCVBUF)] = META_FUNC(int_sk_rcvbuf), |
| 517 | [META_ID(SK_SNDBUF)] = META_FUNC(int_sk_sndbuf), |
| 518 | [META_ID(SK_SHUTDOWN)] = META_FUNC(int_sk_shutdown), |
| 519 | [META_ID(SK_PROTO)] = META_FUNC(int_sk_proto), |
| 520 | [META_ID(SK_TYPE)] = META_FUNC(int_sk_type), |
| 521 | [META_ID(SK_RMEM_ALLOC)] = META_FUNC(int_sk_rmem_alloc), |
| 522 | [META_ID(SK_WMEM_ALLOC)] = META_FUNC(int_sk_wmem_alloc), |
| 523 | [META_ID(SK_OMEM_ALLOC)] = META_FUNC(int_sk_omem_alloc), |
| 524 | [META_ID(SK_WMEM_QUEUED)] = META_FUNC(int_sk_wmem_queued), |
| 525 | [META_ID(SK_RCV_QLEN)] = META_FUNC(int_sk_rcv_qlen), |
| 526 | [META_ID(SK_SND_QLEN)] = META_FUNC(int_sk_snd_qlen), |
| 527 | [META_ID(SK_ERR_QLEN)] = META_FUNC(int_sk_err_qlen), |
| 528 | [META_ID(SK_FORWARD_ALLOCS)] = META_FUNC(int_sk_fwd_alloc), |
| 529 | [META_ID(SK_ALLOCS)] = META_FUNC(int_sk_alloc), |
| 530 | [META_ID(SK_ROUTE_CAPS)] = META_FUNC(int_sk_route_caps), |
Eric Dumazet | 81c3d54 | 2005-10-03 14:13:38 -0700 | [diff] [blame] | 531 | [META_ID(SK_HASH)] = META_FUNC(int_sk_hash), |
Thomas Graf | 4890062 | 2005-06-08 15:10:48 -0700 | [diff] [blame] | 532 | [META_ID(SK_LINGERTIME)] = META_FUNC(int_sk_lingertime), |
| 533 | [META_ID(SK_ACK_BACKLOG)] = META_FUNC(int_sk_ack_bl), |
| 534 | [META_ID(SK_MAX_ACK_BACKLOG)] = META_FUNC(int_sk_max_ack_bl), |
| 535 | [META_ID(SK_PRIO)] = META_FUNC(int_sk_prio), |
| 536 | [META_ID(SK_RCVLOWAT)] = META_FUNC(int_sk_rcvlowat), |
| 537 | [META_ID(SK_RCVTIMEO)] = META_FUNC(int_sk_rcvtimeo), |
| 538 | [META_ID(SK_SNDTIMEO)] = META_FUNC(int_sk_sndtimeo), |
| 539 | [META_ID(SK_SENDMSG_OFF)] = META_FUNC(int_sk_sendmsg_off), |
| 540 | [META_ID(SK_WRITE_PENDING)] = META_FUNC(int_sk_write_pend), |
Stephen Hemminger | 3113e88 | 2008-02-05 03:20:13 -0800 | [diff] [blame] | 541 | [META_ID(VLAN_TAG)] = META_FUNC(int_vlan_tag), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | } |
| 543 | }; |
| 544 | |
| 545 | static inline struct meta_ops * meta_ops(struct meta_value *val) |
| 546 | { |
| 547 | return &__meta_ops[meta_type(val)][meta_id(val)]; |
| 548 | } |
| 549 | |
| 550 | /************************************************************************** |
| 551 | * Type specific operations for TCF_META_TYPE_VAR |
| 552 | **************************************************************************/ |
| 553 | |
| 554 | static int meta_var_compare(struct meta_obj *a, struct meta_obj *b) |
| 555 | { |
| 556 | int r = a->len - b->len; |
| 557 | |
| 558 | if (r == 0) |
| 559 | r = memcmp((void *) a->value, (void *) b->value, a->len); |
| 560 | |
| 561 | return r; |
| 562 | } |
| 563 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 564 | static int meta_var_change(struct meta_value *dst, struct nlattr *nla) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 566 | int len = nla_len(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 568 | dst->val = (unsigned long)kmemdup(nla_data(nla), len, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | if (dst->val == 0UL) |
| 570 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | dst->len = len; |
| 572 | return 0; |
| 573 | } |
| 574 | |
| 575 | static void meta_var_destroy(struct meta_value *v) |
| 576 | { |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 577 | kfree((void *) v->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | } |
| 579 | |
| 580 | static void meta_var_apply_extras(struct meta_value *v, |
| 581 | struct meta_obj *dst) |
| 582 | { |
| 583 | int shift = v->hdr.shift; |
| 584 | |
| 585 | if (shift && shift < dst->len) |
| 586 | dst->len -= shift; |
| 587 | } |
| 588 | |
| 589 | static int meta_var_dump(struct sk_buff *skb, struct meta_value *v, int tlv) |
| 590 | { |
| 591 | if (v->val && v->len) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 592 | NLA_PUT(skb, tlv, v->len, (void *) v->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | return 0; |
| 594 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 595 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | return -1; |
| 597 | } |
| 598 | |
| 599 | /************************************************************************** |
| 600 | * Type specific operations for TCF_META_TYPE_INT |
| 601 | **************************************************************************/ |
| 602 | |
| 603 | static int meta_int_compare(struct meta_obj *a, struct meta_obj *b) |
| 604 | { |
| 605 | /* Let gcc optimize it, the unlikely is not really based on |
| 606 | * some numbers but jump free code for mismatches seems |
| 607 | * more logical. */ |
Thomas Graf | 98e5640 | 2005-06-08 15:11:19 -0700 | [diff] [blame] | 608 | if (unlikely(a->value == b->value)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | return 0; |
Thomas Graf | 98e5640 | 2005-06-08 15:11:19 -0700 | [diff] [blame] | 610 | else if (a->value < b->value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | return -1; |
| 612 | else |
| 613 | return 1; |
| 614 | } |
| 615 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 616 | static int meta_int_change(struct meta_value *dst, struct nlattr *nla) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 618 | if (nla_len(nla) >= sizeof(unsigned long)) { |
| 619 | dst->val = *(unsigned long *) nla_data(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | dst->len = sizeof(unsigned long); |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 621 | } else if (nla_len(nla) == sizeof(u32)) { |
Patrick McHardy | 1587bac | 2008-01-23 20:35:03 -0800 | [diff] [blame] | 622 | dst->val = nla_get_u32(nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | dst->len = sizeof(u32); |
| 624 | } else |
| 625 | return -EINVAL; |
| 626 | |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | static void meta_int_apply_extras(struct meta_value *v, |
| 631 | struct meta_obj *dst) |
| 632 | { |
| 633 | if (v->hdr.shift) |
| 634 | dst->value >>= v->hdr.shift; |
| 635 | |
| 636 | if (v->val) |
| 637 | dst->value &= v->val; |
| 638 | } |
| 639 | |
| 640 | static int meta_int_dump(struct sk_buff *skb, struct meta_value *v, int tlv) |
| 641 | { |
| 642 | if (v->len == sizeof(unsigned long)) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 643 | NLA_PUT(skb, tlv, sizeof(unsigned long), &v->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | else if (v->len == sizeof(u32)) { |
Patrick McHardy | 24beeab | 2008-01-23 20:34:48 -0800 | [diff] [blame] | 645 | NLA_PUT_U32(skb, tlv, v->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | return 0; |
| 649 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 650 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | return -1; |
| 652 | } |
| 653 | |
| 654 | /************************************************************************** |
| 655 | * Type specific operations table |
| 656 | **************************************************************************/ |
| 657 | |
| 658 | struct meta_type_ops |
| 659 | { |
| 660 | void (*destroy)(struct meta_value *); |
| 661 | int (*compare)(struct meta_obj *, struct meta_obj *); |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 662 | int (*change)(struct meta_value *, struct nlattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | void (*apply_extras)(struct meta_value *, struct meta_obj *); |
| 664 | int (*dump)(struct sk_buff *, struct meta_value *, int); |
| 665 | }; |
| 666 | |
| 667 | static struct meta_type_ops __meta_type_ops[TCF_META_TYPE_MAX+1] = { |
| 668 | [TCF_META_TYPE_VAR] = { |
| 669 | .destroy = meta_var_destroy, |
| 670 | .compare = meta_var_compare, |
| 671 | .change = meta_var_change, |
| 672 | .apply_extras = meta_var_apply_extras, |
| 673 | .dump = meta_var_dump |
| 674 | }, |
| 675 | [TCF_META_TYPE_INT] = { |
| 676 | .compare = meta_int_compare, |
| 677 | .change = meta_int_change, |
| 678 | .apply_extras = meta_int_apply_extras, |
| 679 | .dump = meta_int_dump |
| 680 | } |
| 681 | }; |
| 682 | |
| 683 | static inline struct meta_type_ops * meta_type_ops(struct meta_value *v) |
| 684 | { |
| 685 | return &__meta_type_ops[meta_type(v)]; |
| 686 | } |
| 687 | |
| 688 | /************************************************************************** |
| 689 | * Core |
| 690 | **************************************************************************/ |
| 691 | |
Stephen Hemminger | ed7af3b | 2008-02-09 23:26:17 -0800 | [diff] [blame] | 692 | static int meta_get(struct sk_buff *skb, struct tcf_pkt_info *info, |
| 693 | struct meta_value *v, struct meta_obj *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | { |
| 695 | int err = 0; |
| 696 | |
| 697 | if (meta_id(v) == TCF_META_ID_VALUE) { |
| 698 | dst->value = v->val; |
| 699 | dst->len = v->len; |
| 700 | return 0; |
| 701 | } |
| 702 | |
| 703 | meta_ops(v)->get(skb, info, v, dst, &err); |
| 704 | if (err < 0) |
| 705 | return err; |
| 706 | |
| 707 | if (meta_type_ops(v)->apply_extras) |
| 708 | meta_type_ops(v)->apply_extras(v, dst); |
| 709 | |
| 710 | return 0; |
| 711 | } |
| 712 | |
| 713 | static int em_meta_match(struct sk_buff *skb, struct tcf_ematch *m, |
| 714 | struct tcf_pkt_info *info) |
| 715 | { |
| 716 | int r; |
| 717 | struct meta_match *meta = (struct meta_match *) m->data; |
| 718 | struct meta_obj l_value, r_value; |
| 719 | |
| 720 | if (meta_get(skb, info, &meta->lvalue, &l_value) < 0 || |
| 721 | meta_get(skb, info, &meta->rvalue, &r_value) < 0) |
| 722 | return 0; |
| 723 | |
| 724 | r = meta_type_ops(&meta->lvalue)->compare(&l_value, &r_value); |
| 725 | |
| 726 | switch (meta->lvalue.hdr.op) { |
| 727 | case TCF_EM_OPND_EQ: |
| 728 | return !r; |
| 729 | case TCF_EM_OPND_LT: |
| 730 | return r < 0; |
| 731 | case TCF_EM_OPND_GT: |
| 732 | return r > 0; |
| 733 | } |
| 734 | |
| 735 | return 0; |
| 736 | } |
| 737 | |
Stephen Hemminger | ed7af3b | 2008-02-09 23:26:17 -0800 | [diff] [blame] | 738 | static void meta_delete(struct meta_match *meta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | { |
Stephen Hemminger | 04f217a | 2008-02-07 18:13:00 -0800 | [diff] [blame] | 740 | if (meta) { |
| 741 | struct meta_type_ops *ops = meta_type_ops(&meta->lvalue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
Stephen Hemminger | 04f217a | 2008-02-07 18:13:00 -0800 | [diff] [blame] | 743 | if (ops && ops->destroy) { |
| 744 | ops->destroy(&meta->lvalue); |
| 745 | ops->destroy(&meta->rvalue); |
| 746 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | kfree(meta); |
| 750 | } |
| 751 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 752 | static inline int meta_change_data(struct meta_value *dst, struct nlattr *nla) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | { |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 754 | if (nla) { |
| 755 | if (nla_len(nla) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | return -EINVAL; |
| 757 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 758 | return meta_type_ops(dst)->change(dst, nla); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | return 0; |
| 762 | } |
| 763 | |
| 764 | static inline int meta_is_supported(struct meta_value *val) |
| 765 | { |
| 766 | return (!meta_id(val) || meta_ops(val)->get); |
| 767 | } |
| 768 | |
Patrick McHardy | 7a9c1bd | 2008-01-23 20:36:45 -0800 | [diff] [blame] | 769 | static const struct nla_policy meta_policy[TCA_EM_META_MAX + 1] = { |
| 770 | [TCA_EM_META_HDR] = { .len = sizeof(struct tcf_meta_hdr) }, |
| 771 | }; |
| 772 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | static int em_meta_change(struct tcf_proto *tp, void *data, int len, |
| 774 | struct tcf_ematch *m) |
| 775 | { |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 776 | int err; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 777 | struct nlattr *tb[TCA_EM_META_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | struct tcf_meta_hdr *hdr; |
| 779 | struct meta_match *meta = NULL; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 780 | |
Patrick McHardy | 7a9c1bd | 2008-01-23 20:36:45 -0800 | [diff] [blame] | 781 | err = nla_parse(tb, TCA_EM_META_MAX, data, len, meta_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 782 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | goto errout; |
| 784 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 785 | err = -EINVAL; |
Patrick McHardy | 7a9c1bd | 2008-01-23 20:36:45 -0800 | [diff] [blame] | 786 | if (tb[TCA_EM_META_HDR] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | goto errout; |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 788 | hdr = nla_data(tb[TCA_EM_META_HDR]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | |
| 790 | if (TCF_META_TYPE(hdr->left.kind) != TCF_META_TYPE(hdr->right.kind) || |
| 791 | TCF_META_TYPE(hdr->left.kind) > TCF_META_TYPE_MAX || |
| 792 | TCF_META_ID(hdr->left.kind) > TCF_META_ID_MAX || |
| 793 | TCF_META_ID(hdr->right.kind) > TCF_META_ID_MAX) |
| 794 | goto errout; |
| 795 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 796 | meta = kzalloc(sizeof(*meta), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | if (meta == NULL) |
| 798 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
| 800 | memcpy(&meta->lvalue.hdr, &hdr->left, sizeof(hdr->left)); |
| 801 | memcpy(&meta->rvalue.hdr, &hdr->right, sizeof(hdr->right)); |
| 802 | |
| 803 | if (!meta_is_supported(&meta->lvalue) || |
| 804 | !meta_is_supported(&meta->rvalue)) { |
| 805 | err = -EOPNOTSUPP; |
| 806 | goto errout; |
| 807 | } |
| 808 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 809 | if (meta_change_data(&meta->lvalue, tb[TCA_EM_META_LVALUE]) < 0 || |
| 810 | meta_change_data(&meta->rvalue, tb[TCA_EM_META_RVALUE]) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | goto errout; |
| 812 | |
| 813 | m->datalen = sizeof(*meta); |
| 814 | m->data = (unsigned long) meta; |
| 815 | |
| 816 | err = 0; |
| 817 | errout: |
| 818 | if (err && meta) |
| 819 | meta_delete(meta); |
| 820 | return err; |
| 821 | } |
| 822 | |
| 823 | static void em_meta_destroy(struct tcf_proto *tp, struct tcf_ematch *m) |
| 824 | { |
| 825 | if (m) |
| 826 | meta_delete((struct meta_match *) m->data); |
| 827 | } |
| 828 | |
| 829 | static int em_meta_dump(struct sk_buff *skb, struct tcf_ematch *em) |
| 830 | { |
| 831 | struct meta_match *meta = (struct meta_match *) em->data; |
| 832 | struct tcf_meta_hdr hdr; |
| 833 | struct meta_type_ops *ops; |
| 834 | |
| 835 | memset(&hdr, 0, sizeof(hdr)); |
| 836 | memcpy(&hdr.left, &meta->lvalue.hdr, sizeof(hdr.left)); |
| 837 | memcpy(&hdr.right, &meta->rvalue.hdr, sizeof(hdr.right)); |
| 838 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 839 | NLA_PUT(skb, TCA_EM_META_HDR, sizeof(hdr), &hdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | |
| 841 | ops = meta_type_ops(&meta->lvalue); |
| 842 | if (ops->dump(skb, &meta->lvalue, TCA_EM_META_LVALUE) < 0 || |
| 843 | ops->dump(skb, &meta->rvalue, TCA_EM_META_RVALUE) < 0) |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 844 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | |
| 846 | return 0; |
| 847 | |
Patrick McHardy | add93b6 | 2008-01-22 22:11:33 -0800 | [diff] [blame] | 848 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | return -1; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 850 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
| 852 | static struct tcf_ematch_ops em_meta_ops = { |
| 853 | .kind = TCF_EM_META, |
| 854 | .change = em_meta_change, |
| 855 | .match = em_meta_match, |
| 856 | .destroy = em_meta_destroy, |
| 857 | .dump = em_meta_dump, |
| 858 | .owner = THIS_MODULE, |
| 859 | .link = LIST_HEAD_INIT(em_meta_ops.link) |
| 860 | }; |
| 861 | |
| 862 | static int __init init_em_meta(void) |
| 863 | { |
| 864 | return tcf_em_register(&em_meta_ops); |
| 865 | } |
| 866 | |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 867 | static void __exit exit_em_meta(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | { |
| 869 | tcf_em_unregister(&em_meta_ops); |
| 870 | } |
| 871 | |
| 872 | MODULE_LICENSE("GPL"); |
| 873 | |
| 874 | module_init(init_em_meta); |
| 875 | module_exit(exit_em_meta); |
Patrick McHardy | db3d99c | 2007-07-11 19:46:26 -0700 | [diff] [blame] | 876 | |
| 877 | MODULE_ALIAS_TCF_EMATCH(TCF_EM_META); |