1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #include <linux/kernel.h> 3 #include <linux/init.h> 4 #include <linux/module.h> 5 #include <linux/seqlock.h> 6 #include <linux/netlink.h> 7 #include <linux/netfilter.h> 8 #include <linux/netfilter/nf_tables.h> 9 #include <net/netfilter/nf_tables.h> 10 #include <net/dst_metadata.h> 11 #include <net/ip_tunnels.h> 12 #include <net/vxlan.h> 13 #include <net/erspan.h> 14 15 struct nft_tunnel { 16 enum nft_tunnel_keys key:8; 17 enum nft_registers dreg:8; 18 enum nft_tunnel_mode mode:8; 19 }; 20 21 static void nft_tunnel_get_eval(const struct nft_expr *expr, 22 struct nft_regs *regs, 23 const struct nft_pktinfo *pkt) 24 { 25 const struct nft_tunnel *priv = nft_expr_priv(expr); 26 u32 *dest = ®s->data[priv->dreg]; 27 struct ip_tunnel_info *tun_info; 28 29 tun_info = skb_tunnel_info(pkt->skb); 30 31 switch (priv->key) { 32 case NFT_TUNNEL_PATH: 33 if (!tun_info) { 34 nft_reg_store8(dest, false); 35 return; 36 } 37 if (priv->mode == NFT_TUNNEL_MODE_NONE || 38 (priv->mode == NFT_TUNNEL_MODE_RX && 39 !(tun_info->mode & IP_TUNNEL_INFO_TX)) || 40 (priv->mode == NFT_TUNNEL_MODE_TX && 41 (tun_info->mode & IP_TUNNEL_INFO_TX))) 42 nft_reg_store8(dest, true); 43 else 44 nft_reg_store8(dest, false); 45 break; 46 case NFT_TUNNEL_ID: 47 if (!tun_info) { 48 regs->verdict.code = NFT_BREAK; 49 return; 50 } 51 if (priv->mode == NFT_TUNNEL_MODE_NONE || 52 (priv->mode == NFT_TUNNEL_MODE_RX && 53 !(tun_info->mode & IP_TUNNEL_INFO_TX)) || 54 (priv->mode == NFT_TUNNEL_MODE_TX && 55 (tun_info->mode & IP_TUNNEL_INFO_TX))) 56 *dest = ntohl(tunnel_id_to_key32(tun_info->key.tun_id)); 57 else 58 regs->verdict.code = NFT_BREAK; 59 break; 60 default: 61 WARN_ON(1); 62 regs->verdict.code = NFT_BREAK; 63 } 64 } 65 66 static const struct nla_policy nft_tunnel_policy[NFTA_TUNNEL_MAX + 1] = { 67 [NFTA_TUNNEL_KEY] = { .type = NLA_U32 }, 68 [NFTA_TUNNEL_DREG] = { .type = NLA_U32 }, 69 [NFTA_TUNNEL_MODE] = { .type = NLA_U32 }, 70 }; 71 72 static int nft_tunnel_get_init(const struct nft_ctx *ctx, 73 const struct nft_expr *expr, 74 const struct nlattr * const tb[]) 75 { 76 struct nft_tunnel *priv = nft_expr_priv(expr); 77 u32 len; 78 79 if (!tb[NFTA_TUNNEL_KEY] && 80 !tb[NFTA_TUNNEL_DREG]) 81 return -EINVAL; 82 83 priv->key = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY])); 84 switch (priv->key) { 85 case NFT_TUNNEL_PATH: 86 len = sizeof(u8); 87 break; 88 case NFT_TUNNEL_ID: 89 len = sizeof(u32); 90 break; 91 default: 92 return -EOPNOTSUPP; 93 } 94 95 priv->dreg = nft_parse_register(tb[NFTA_TUNNEL_DREG]); 96 97 if (tb[NFTA_TUNNEL_MODE]) { 98 priv->mode = ntohl(nla_get_be32(tb[NFTA_TUNNEL_MODE])); 99 if (priv->mode > NFT_TUNNEL_MODE_MAX) 100 return -EOPNOTSUPP; 101 } else { 102 priv->mode = NFT_TUNNEL_MODE_NONE; 103 } 104 105 return nft_validate_register_store(ctx, priv->dreg, NULL, 106 NFT_DATA_VALUE, len); 107 } 108 109 static int nft_tunnel_get_dump(struct sk_buff *skb, 110 const struct nft_expr *expr) 111 { 112 const struct nft_tunnel *priv = nft_expr_priv(expr); 113 114 if (nla_put_be32(skb, NFTA_TUNNEL_KEY, htonl(priv->key))) 115 goto nla_put_failure; 116 if (nft_dump_register(skb, NFTA_TUNNEL_DREG, priv->dreg)) 117 goto nla_put_failure; 118 if (nla_put_be32(skb, NFTA_TUNNEL_MODE, htonl(priv->mode))) 119 goto nla_put_failure; 120 return 0; 121 122 nla_put_failure: 123 return -1; 124 } 125 126 static struct nft_expr_type nft_tunnel_type; 127 static const struct nft_expr_ops nft_tunnel_get_ops = { 128 .type = &nft_tunnel_type, 129 .size = NFT_EXPR_SIZE(sizeof(struct nft_tunnel)), 130 .eval = nft_tunnel_get_eval, 131 .init = nft_tunnel_get_init, 132 .dump = nft_tunnel_get_dump, 133 }; 134 135 static struct nft_expr_type nft_tunnel_type __read_mostly = { 136 .name = "tunnel", 137 .ops = &nft_tunnel_get_ops, 138 .policy = nft_tunnel_policy, 139 .maxattr = NFTA_TUNNEL_MAX, 140 .owner = THIS_MODULE, 141 }; 142 143 struct nft_tunnel_opts { 144 union { 145 struct vxlan_metadata vxlan; 146 struct erspan_metadata erspan; 147 } u; 148 u32 len; 149 __be16 flags; 150 }; 151 152 struct nft_tunnel_obj { 153 struct metadata_dst *md; 154 struct nft_tunnel_opts opts; 155 }; 156 157 static const struct nla_policy nft_tunnel_ip_policy[NFTA_TUNNEL_KEY_IP_MAX + 1] = { 158 [NFTA_TUNNEL_KEY_IP_SRC] = { .type = NLA_U32 }, 159 [NFTA_TUNNEL_KEY_IP_DST] = { .type = NLA_U32 }, 160 }; 161 162 static int nft_tunnel_obj_ip_init(const struct nft_ctx *ctx, 163 const struct nlattr *attr, 164 struct ip_tunnel_info *info) 165 { 166 struct nlattr *tb[NFTA_TUNNEL_KEY_IP_MAX + 1]; 167 int err; 168 169 err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_IP_MAX, attr, 170 nft_tunnel_ip_policy, NULL); 171 if (err < 0) 172 return err; 173 174 if (!tb[NFTA_TUNNEL_KEY_IP_DST]) 175 return -EINVAL; 176 177 if (tb[NFTA_TUNNEL_KEY_IP_SRC]) 178 info->key.u.ipv4.src = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP_SRC]); 179 if (tb[NFTA_TUNNEL_KEY_IP_DST]) 180 info->key.u.ipv4.dst = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP_DST]); 181 182 return 0; 183 } 184 185 static const struct nla_policy nft_tunnel_ip6_policy[NFTA_TUNNEL_KEY_IP6_MAX + 1] = { 186 [NFTA_TUNNEL_KEY_IP6_SRC] = { .len = sizeof(struct in6_addr), }, 187 [NFTA_TUNNEL_KEY_IP6_DST] = { .len = sizeof(struct in6_addr), }, 188 [NFTA_TUNNEL_KEY_IP6_FLOWLABEL] = { .type = NLA_U32, } 189 }; 190 191 static int nft_tunnel_obj_ip6_init(const struct nft_ctx *ctx, 192 const struct nlattr *attr, 193 struct ip_tunnel_info *info) 194 { 195 struct nlattr *tb[NFTA_TUNNEL_KEY_IP6_MAX + 1]; 196 int err; 197 198 err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_IP6_MAX, attr, 199 nft_tunnel_ip6_policy, NULL); 200 if (err < 0) 201 return err; 202 203 if (!tb[NFTA_TUNNEL_KEY_IP6_DST]) 204 return -EINVAL; 205 206 if (tb[NFTA_TUNNEL_KEY_IP6_SRC]) { 207 memcpy(&info->key.u.ipv6.src, 208 nla_data(tb[NFTA_TUNNEL_KEY_IP6_SRC]), 209 sizeof(struct in6_addr)); 210 } 211 if (tb[NFTA_TUNNEL_KEY_IP6_DST]) { 212 memcpy(&info->key.u.ipv6.dst, 213 nla_data(tb[NFTA_TUNNEL_KEY_IP6_DST]), 214 sizeof(struct in6_addr)); 215 } 216 if (tb[NFTA_TUNNEL_KEY_IP6_FLOWLABEL]) 217 info->key.label = nla_get_be32(tb[NFTA_TUNNEL_KEY_IP6_FLOWLABEL]); 218 219 info->mode |= IP_TUNNEL_INFO_IPV6; 220 221 return 0; 222 } 223 224 static const struct nla_policy nft_tunnel_opts_vxlan_policy[NFTA_TUNNEL_KEY_VXLAN_MAX + 1] = { 225 [NFTA_TUNNEL_KEY_VXLAN_GBP] = { .type = NLA_U32 }, 226 }; 227 228 static int nft_tunnel_obj_vxlan_init(const struct nlattr *attr, 229 struct nft_tunnel_opts *opts) 230 { 231 struct nlattr *tb[NFTA_TUNNEL_KEY_VXLAN_MAX + 1]; 232 int err; 233 234 err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_VXLAN_MAX, attr, 235 nft_tunnel_opts_vxlan_policy, NULL); 236 if (err < 0) 237 return err; 238 239 if (!tb[NFTA_TUNNEL_KEY_VXLAN_GBP]) 240 return -EINVAL; 241 242 opts->u.vxlan.gbp = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_VXLAN_GBP])); 243 244 opts->len = sizeof(struct vxlan_metadata); 245 opts->flags = TUNNEL_VXLAN_OPT; 246 247 return 0; 248 } 249 250 static const struct nla_policy nft_tunnel_opts_erspan_policy[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1] = { 251 [NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX] = { .type = NLA_U32 }, 252 [NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] = { .type = NLA_U8 }, 253 [NFTA_TUNNEL_KEY_ERSPAN_V2_HWID] = { .type = NLA_U8 }, 254 }; 255 256 static int nft_tunnel_obj_erspan_init(const struct nlattr *attr, 257 struct nft_tunnel_opts *opts) 258 { 259 struct nlattr *tb[NFTA_TUNNEL_KEY_ERSPAN_MAX + 1]; 260 uint8_t hwid, dir; 261 int err, version; 262 263 err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_ERSPAN_MAX, 264 attr, nft_tunnel_opts_erspan_policy, 265 NULL); 266 if (err < 0) 267 return err; 268 269 version = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_VERSION])); 270 switch (version) { 271 case ERSPAN_VERSION: 272 if (!tb[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX]) 273 return -EINVAL; 274 275 opts->u.erspan.u.index = 276 nla_get_be32(tb[NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX]); 277 break; 278 case ERSPAN_VERSION2: 279 if (!tb[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR] || 280 !tb[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID]) 281 return -EINVAL; 282 283 hwid = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_V2_HWID]); 284 dir = nla_get_u8(tb[NFTA_TUNNEL_KEY_ERSPAN_V2_DIR]); 285 286 set_hwid(&opts->u.erspan.u.md2, hwid); 287 opts->u.erspan.u.md2.dir = dir; 288 break; 289 default: 290 return -EOPNOTSUPP; 291 } 292 opts->u.erspan.version = version; 293 294 opts->len = sizeof(struct erspan_metadata); 295 opts->flags = TUNNEL_ERSPAN_OPT; 296 297 return 0; 298 } 299 300 static const struct nla_policy nft_tunnel_opts_policy[NFTA_TUNNEL_KEY_OPTS_MAX + 1] = { 301 [NFTA_TUNNEL_KEY_OPTS_VXLAN] = { .type = NLA_NESTED, }, 302 [NFTA_TUNNEL_KEY_OPTS_ERSPAN] = { .type = NLA_NESTED, }, 303 }; 304 305 static int nft_tunnel_obj_opts_init(const struct nft_ctx *ctx, 306 const struct nlattr *attr, 307 struct ip_tunnel_info *info, 308 struct nft_tunnel_opts *opts) 309 { 310 struct nlattr *tb[NFTA_TUNNEL_KEY_OPTS_MAX + 1]; 311 int err; 312 313 err = nla_parse_nested_deprecated(tb, NFTA_TUNNEL_KEY_OPTS_MAX, attr, 314 nft_tunnel_opts_policy, NULL); 315 if (err < 0) 316 return err; 317 318 if (tb[NFTA_TUNNEL_KEY_OPTS_VXLAN]) { 319 err = nft_tunnel_obj_vxlan_init(tb[NFTA_TUNNEL_KEY_OPTS_VXLAN], 320 opts); 321 } else if (tb[NFTA_TUNNEL_KEY_OPTS_ERSPAN]) { 322 err = nft_tunnel_obj_erspan_init(tb[NFTA_TUNNEL_KEY_OPTS_ERSPAN], 323 opts); 324 } else { 325 return -EOPNOTSUPP; 326 } 327 328 return err; 329 } 330 331 static const struct nla_policy nft_tunnel_key_policy[NFTA_TUNNEL_KEY_MAX + 1] = { 332 [NFTA_TUNNEL_KEY_IP] = { .type = NLA_NESTED, }, 333 [NFTA_TUNNEL_KEY_IP6] = { .type = NLA_NESTED, }, 334 [NFTA_TUNNEL_KEY_ID] = { .type = NLA_U32, }, 335 [NFTA_TUNNEL_KEY_FLAGS] = { .type = NLA_U32, }, 336 [NFTA_TUNNEL_KEY_TOS] = { .type = NLA_U8, }, 337 [NFTA_TUNNEL_KEY_TTL] = { .type = NLA_U8, }, 338 [NFTA_TUNNEL_KEY_OPTS] = { .type = NLA_NESTED, }, 339 }; 340 341 static int nft_tunnel_obj_init(const struct nft_ctx *ctx, 342 const struct nlattr * const tb[], 343 struct nft_object *obj) 344 { 345 struct nft_tunnel_obj *priv = nft_obj_data(obj); 346 struct ip_tunnel_info info; 347 struct metadata_dst *md; 348 int err; 349 350 if (!tb[NFTA_TUNNEL_KEY_ID]) 351 return -EINVAL; 352 353 memset(&info, 0, sizeof(info)); 354 info.mode = IP_TUNNEL_INFO_TX; 355 info.key.tun_id = key32_to_tunnel_id(nla_get_be32(tb[NFTA_TUNNEL_KEY_ID])); 356 info.key.tun_flags = TUNNEL_KEY | TUNNEL_CSUM | TUNNEL_NOCACHE; 357 358 if (tb[NFTA_TUNNEL_KEY_IP]) { 359 err = nft_tunnel_obj_ip_init(ctx, tb[NFTA_TUNNEL_KEY_IP], &info); 360 if (err < 0) 361 return err; 362 } else if (tb[NFTA_TUNNEL_KEY_IP6]) { 363 err = nft_tunnel_obj_ip6_init(ctx, tb[NFTA_TUNNEL_KEY_IP6], &info); 364 if (err < 0) 365 return err; 366 } else { 367 return -EINVAL; 368 } 369 370 if (tb[NFTA_TUNNEL_KEY_SPORT]) { 371 info.key.tp_src = nla_get_be16(tb[NFTA_TUNNEL_KEY_SPORT]); 372 } 373 if (tb[NFTA_TUNNEL_KEY_DPORT]) { 374 info.key.tp_dst = nla_get_be16(tb[NFTA_TUNNEL_KEY_DPORT]); 375 } 376 377 if (tb[NFTA_TUNNEL_KEY_FLAGS]) { 378 u32 tun_flags; 379 380 tun_flags = ntohl(nla_get_be32(tb[NFTA_TUNNEL_KEY_FLAGS])); 381 if (tun_flags & ~NFT_TUNNEL_F_MASK) 382 return -EOPNOTSUPP; 383 384 if (tun_flags & NFT_TUNNEL_F_ZERO_CSUM_TX) 385 info.key.tun_flags &= ~TUNNEL_CSUM; 386 if (tun_flags & NFT_TUNNEL_F_DONT_FRAGMENT) 387 info.key.tun_flags |= TUNNEL_DONT_FRAGMENT; 388 if (tun_flags & NFT_TUNNEL_F_SEQ_NUMBER) 389 info.key.tun_flags |= TUNNEL_SEQ; 390 } 391 if (tb[NFTA_TUNNEL_KEY_TOS]) 392 info.key.tos = nla_get_u8(tb[NFTA_TUNNEL_KEY_TOS]); 393 if (tb[NFTA_TUNNEL_KEY_TTL]) 394 info.key.ttl = nla_get_u8(tb[NFTA_TUNNEL_KEY_TTL]); 395 else 396 info.key.ttl = U8_MAX; 397 398 if (tb[NFTA_TUNNEL_KEY_OPTS]) { 399 err = nft_tunnel_obj_opts_init(ctx, tb[NFTA_TUNNEL_KEY_OPTS], 400 &info, &priv->opts); 401 if (err < 0) 402 return err; 403 } 404 405 md = metadata_dst_alloc(priv->opts.len, METADATA_IP_TUNNEL, GFP_KERNEL); 406 if (!md) 407 return -ENOMEM; 408 409 memcpy(&md->u.tun_info, &info, sizeof(info)); 410 #ifdef CONFIG_DST_CACHE 411 err = dst_cache_init(&md->u.tun_info.dst_cache, GFP_KERNEL); 412 if (err < 0) { 413 metadata_dst_free(md); 414 return err; 415 } 416 #endif 417 ip_tunnel_info_opts_set(&md->u.tun_info, &priv->opts.u, priv->opts.len, 418 priv->opts.flags); 419 priv->md = md; 420 421 return 0; 422 } 423 424 static inline void nft_tunnel_obj_eval(struct nft_object *obj, 425 struct nft_regs *regs, 426 const struct nft_pktinfo *pkt) 427 { 428 struct nft_tunnel_obj *priv = nft_obj_data(obj); 429 struct sk_buff *skb = pkt->skb; 430 431 skb_dst_drop(skb); 432 dst_hold((struct dst_entry *) priv->md); 433 skb_dst_set(skb, (struct dst_entry *) priv->md); 434 } 435 436 static int nft_tunnel_ip_dump(struct sk_buff *skb, struct ip_tunnel_info *info) 437 { 438 struct nlattr *nest; 439 440 if (info->mode & IP_TUNNEL_INFO_IPV6) { 441 nest = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_IP6); 442 if (!nest) 443 return -1; 444 445 if (nla_put_in6_addr(skb, NFTA_TUNNEL_KEY_IP6_SRC, &info->key.u.ipv6.src) < 0 || 446 nla_put_in6_addr(skb, NFTA_TUNNEL_KEY_IP6_DST, &info->key.u.ipv6.dst) < 0 || 447 nla_put_be32(skb, NFTA_TUNNEL_KEY_IP6_FLOWLABEL, info->key.label)) 448 return -1; 449 450 nla_nest_end(skb, nest); 451 } else { 452 nest = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_IP); 453 if (!nest) 454 return -1; 455 456 if (nla_put_in_addr(skb, NFTA_TUNNEL_KEY_IP_SRC, info->key.u.ipv4.src) < 0 || 457 nla_put_in_addr(skb, NFTA_TUNNEL_KEY_IP_DST, info->key.u.ipv4.dst) < 0) 458 return -1; 459 460 nla_nest_end(skb, nest); 461 } 462 463 return 0; 464 } 465 466 static int nft_tunnel_opts_dump(struct sk_buff *skb, 467 struct nft_tunnel_obj *priv) 468 { 469 struct nft_tunnel_opts *opts = &priv->opts; 470 struct nlattr *nest; 471 472 nest = nla_nest_start_noflag(skb, NFTA_TUNNEL_KEY_OPTS); 473 if (!nest) 474 return -1; 475 476 if (opts->flags & TUNNEL_VXLAN_OPT) { 477 if (nla_put_be32(skb, NFTA_TUNNEL_KEY_VXLAN_GBP, 478 htonl(opts->u.vxlan.gbp))) 479 return -1; 480 } else if (opts->flags & TUNNEL_ERSPAN_OPT) { 481 switch (opts->u.erspan.version) { 482 case ERSPAN_VERSION: 483 if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ERSPAN_V1_INDEX, 484 opts->u.erspan.u.index)) 485 return -1; 486 break; 487 case ERSPAN_VERSION2: 488 if (nla_put_u8(skb, NFTA_TUNNEL_KEY_ERSPAN_V2_HWID, 489 get_hwid(&opts->u.erspan.u.md2)) || 490 nla_put_u8(skb, NFTA_TUNNEL_KEY_ERSPAN_V2_DIR, 491 opts->u.erspan.u.md2.dir)) 492 return -1; 493 break; 494 } 495 } 496 nla_nest_end(skb, nest); 497 498 return 0; 499 } 500 501 static int nft_tunnel_ports_dump(struct sk_buff *skb, 502 struct ip_tunnel_info *info) 503 { 504 if (nla_put_be16(skb, NFTA_TUNNEL_KEY_SPORT, htons(info->key.tp_src)) < 0 || 505 nla_put_be16(skb, NFTA_TUNNEL_KEY_DPORT, htons(info->key.tp_dst)) < 0) 506 return -1; 507 508 return 0; 509 } 510 511 static int nft_tunnel_flags_dump(struct sk_buff *skb, 512 struct ip_tunnel_info *info) 513 { 514 u32 flags = 0; 515 516 if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) 517 flags |= NFT_TUNNEL_F_DONT_FRAGMENT; 518 if (!(info->key.tun_flags & TUNNEL_CSUM)) 519 flags |= NFT_TUNNEL_F_ZERO_CSUM_TX; 520 if (info->key.tun_flags & TUNNEL_SEQ) 521 flags |= NFT_TUNNEL_F_SEQ_NUMBER; 522 523 if (nla_put_be32(skb, NFTA_TUNNEL_KEY_FLAGS, htonl(flags)) < 0) 524 return -1; 525 526 return 0; 527 } 528 529 static int nft_tunnel_obj_dump(struct sk_buff *skb, 530 struct nft_object *obj, bool reset) 531 { 532 struct nft_tunnel_obj *priv = nft_obj_data(obj); 533 struct ip_tunnel_info *info = &priv->md->u.tun_info; 534 535 if (nla_put_be32(skb, NFTA_TUNNEL_KEY_ID, 536 tunnel_id_to_key32(info->key.tun_id)) || 537 nft_tunnel_ip_dump(skb, info) < 0 || 538 nft_tunnel_ports_dump(skb, info) < 0 || 539 nft_tunnel_flags_dump(skb, info) < 0 || 540 nla_put_u8(skb, NFTA_TUNNEL_KEY_TOS, info->key.tos) || 541 nla_put_u8(skb, NFTA_TUNNEL_KEY_TTL, info->key.ttl) || 542 nft_tunnel_opts_dump(skb, priv) < 0) 543 goto nla_put_failure; 544 545 return 0; 546 547 nla_put_failure: 548 return -1; 549 } 550 551 static void nft_tunnel_obj_destroy(const struct nft_ctx *ctx, 552 struct nft_object *obj) 553 { 554 struct nft_tunnel_obj *priv = nft_obj_data(obj); 555 556 metadata_dst_free(priv->md); 557 } 558 559 static struct nft_object_type nft_tunnel_obj_type; 560 static const struct nft_object_ops nft_tunnel_obj_ops = { 561 .type = &nft_tunnel_obj_type, 562 .size = sizeof(struct nft_tunnel_obj), 563 .eval = nft_tunnel_obj_eval, 564 .init = nft_tunnel_obj_init, 565 .destroy = nft_tunnel_obj_destroy, 566 .dump = nft_tunnel_obj_dump, 567 }; 568 569 static struct nft_object_type nft_tunnel_obj_type __read_mostly = { 570 .type = NFT_OBJECT_TUNNEL, 571 .ops = &nft_tunnel_obj_ops, 572 .maxattr = NFTA_TUNNEL_KEY_MAX, 573 .policy = nft_tunnel_key_policy, 574 .owner = THIS_MODULE, 575 }; 576 577 static int __init nft_tunnel_module_init(void) 578 { 579 int err; 580 581 err = nft_register_expr(&nft_tunnel_type); 582 if (err < 0) 583 return err; 584 585 err = nft_register_obj(&nft_tunnel_obj_type); 586 if (err < 0) 587 nft_unregister_expr(&nft_tunnel_type); 588 589 return err; 590 } 591 592 static void __exit nft_tunnel_module_exit(void) 593 { 594 nft_unregister_obj(&nft_tunnel_obj_type); 595 nft_unregister_expr(&nft_tunnel_type); 596 } 597 598 module_init(nft_tunnel_module_init); 599 module_exit(nft_tunnel_module_exit); 600 601 MODULE_LICENSE("GPL"); 602 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>"); 603 MODULE_ALIAS_NFT_EXPR("tunnel"); 604 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_TUNNEL); 605