1 /* 2 * Copyright (c) 2016, Amir Vadai <amir@vadai.me> 3 * Copyright (c) 2016, Mellanox Technologies. All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/kernel.h> 14 #include <linux/skbuff.h> 15 #include <linux/rtnetlink.h> 16 #include <net/geneve.h> 17 #include <net/netlink.h> 18 #include <net/pkt_sched.h> 19 #include <net/dst.h> 20 21 #include <linux/tc_act/tc_tunnel_key.h> 22 #include <net/tc_act/tc_tunnel_key.h> 23 24 static unsigned int tunnel_key_net_id; 25 static struct tc_action_ops act_tunnel_key_ops; 26 27 static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a, 28 struct tcf_result *res) 29 { 30 struct tcf_tunnel_key *t = to_tunnel_key(a); 31 struct tcf_tunnel_key_params *params; 32 int action; 33 34 params = rcu_dereference_bh(t->params); 35 36 tcf_lastuse_update(&t->tcf_tm); 37 bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb); 38 action = READ_ONCE(t->tcf_action); 39 40 switch (params->tcft_action) { 41 case TCA_TUNNEL_KEY_ACT_RELEASE: 42 skb_dst_drop(skb); 43 break; 44 case TCA_TUNNEL_KEY_ACT_SET: 45 skb_dst_drop(skb); 46 skb_dst_set(skb, dst_clone(¶ms->tcft_enc_metadata->dst)); 47 break; 48 default: 49 WARN_ONCE(1, "Bad tunnel_key action %d.\n", 50 params->tcft_action); 51 break; 52 } 53 54 return action; 55 } 56 57 static const struct nla_policy 58 enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = { 59 [TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 60 }; 61 62 static const struct nla_policy 63 geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = { 64 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 65 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 66 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 67 .len = 128 }, 68 }; 69 70 static int 71 tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len, 72 struct netlink_ext_ack *extack) 73 { 74 struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1]; 75 int err, data_len, opt_len; 76 u8 *data; 77 78 err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX, 79 nla, geneve_opt_policy, extack); 80 if (err < 0) 81 return err; 82 83 if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] || 84 !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] || 85 !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) { 86 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 87 return -EINVAL; 88 } 89 90 data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]); 91 data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]); 92 if (data_len < 4) { 93 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 94 return -ERANGE; 95 } 96 if (data_len % 4) { 97 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 98 return -ERANGE; 99 } 100 101 opt_len = sizeof(struct geneve_opt) + data_len; 102 if (dst) { 103 struct geneve_opt *opt = dst; 104 105 WARN_ON(dst_len < opt_len); 106 107 opt->opt_class = 108 nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]); 109 opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]); 110 opt->length = data_len / 4; /* length is in units of 4 bytes */ 111 opt->r1 = 0; 112 opt->r2 = 0; 113 opt->r3 = 0; 114 115 memcpy(opt + 1, data, data_len); 116 } 117 118 return opt_len; 119 } 120 121 static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst, 122 int dst_len, struct netlink_ext_ack *extack) 123 { 124 int err, rem, opt_len, len = nla_len(nla), opts_len = 0; 125 const struct nlattr *attr, *head = nla_data(nla); 126 127 err = nla_validate(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX, 128 enc_opts_policy, extack); 129 if (err) 130 return err; 131 132 nla_for_each_attr(attr, head, len, rem) { 133 switch (nla_type(attr)) { 134 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE: 135 opt_len = tunnel_key_copy_geneve_opt(attr, dst, 136 dst_len, extack); 137 if (opt_len < 0) 138 return opt_len; 139 opts_len += opt_len; 140 if (dst) { 141 dst_len -= opt_len; 142 dst += opt_len; 143 } 144 break; 145 } 146 } 147 148 if (!opts_len) { 149 NL_SET_ERR_MSG(extack, "Empty list of tunnel options"); 150 return -EINVAL; 151 } 152 153 if (rem > 0) { 154 NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes"); 155 return -EINVAL; 156 } 157 158 return opts_len; 159 } 160 161 static int tunnel_key_get_opts_len(struct nlattr *nla, 162 struct netlink_ext_ack *extack) 163 { 164 return tunnel_key_copy_opts(nla, NULL, 0, extack); 165 } 166 167 static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info, 168 int opts_len, struct netlink_ext_ack *extack) 169 { 170 info->options_len = opts_len; 171 switch (nla_type(nla_data(nla))) { 172 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE: 173 #if IS_ENABLED(CONFIG_INET) 174 info->key.tun_flags |= TUNNEL_GENEVE_OPT; 175 return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info), 176 opts_len, extack); 177 #else 178 return -EAFNOSUPPORT; 179 #endif 180 default: 181 NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type"); 182 return -EINVAL; 183 } 184 } 185 186 static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = { 187 [TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) }, 188 [TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 189 [TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 190 [TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 191 [TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 192 [TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 193 [TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16}, 194 [TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 }, 195 [TCA_TUNNEL_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 196 [TCA_TUNNEL_KEY_ENC_TOS] = { .type = NLA_U8 }, 197 [TCA_TUNNEL_KEY_ENC_TTL] = { .type = NLA_U8 }, 198 }; 199 200 static void tunnel_key_release_params(struct tcf_tunnel_key_params *p) 201 { 202 if (!p) 203 return; 204 if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET) 205 dst_release(&p->tcft_enc_metadata->dst); 206 kfree_rcu(p, rcu); 207 } 208 209 static int tunnel_key_init(struct net *net, struct nlattr *nla, 210 struct nlattr *est, struct tc_action **a, 211 int ovr, int bind, bool rtnl_held, 212 struct netlink_ext_ack *extack) 213 { 214 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 215 struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1]; 216 struct tcf_tunnel_key_params *params_new; 217 struct metadata_dst *metadata = NULL; 218 struct tc_tunnel_key *parm; 219 struct tcf_tunnel_key *t; 220 bool exists = false; 221 __be16 dst_port = 0; 222 __be64 key_id = 0; 223 int opts_len = 0; 224 __be16 flags = 0; 225 u8 tos, ttl; 226 int ret = 0; 227 int err; 228 229 if (!nla) { 230 NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed"); 231 return -EINVAL; 232 } 233 234 err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy, 235 extack); 236 if (err < 0) { 237 NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes"); 238 return err; 239 } 240 241 if (!tb[TCA_TUNNEL_KEY_PARMS]) { 242 NL_SET_ERR_MSG(extack, "Missing tunnel key parameters"); 243 return -EINVAL; 244 } 245 246 parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]); 247 err = tcf_idr_check_alloc(tn, &parm->index, a, bind); 248 if (err < 0) 249 return err; 250 exists = err; 251 if (exists && bind) 252 return 0; 253 254 switch (parm->t_action) { 255 case TCA_TUNNEL_KEY_ACT_RELEASE: 256 break; 257 case TCA_TUNNEL_KEY_ACT_SET: 258 if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) { 259 __be32 key32; 260 261 key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]); 262 key_id = key32_to_tunnel_id(key32); 263 flags = TUNNEL_KEY; 264 } 265 266 flags |= TUNNEL_CSUM; 267 if (tb[TCA_TUNNEL_KEY_NO_CSUM] && 268 nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM])) 269 flags &= ~TUNNEL_CSUM; 270 271 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT]) 272 dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]); 273 274 if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) { 275 opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS], 276 extack); 277 if (opts_len < 0) { 278 ret = opts_len; 279 goto err_out; 280 } 281 } 282 283 tos = 0; 284 if (tb[TCA_TUNNEL_KEY_ENC_TOS]) 285 tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]); 286 ttl = 0; 287 if (tb[TCA_TUNNEL_KEY_ENC_TTL]) 288 ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]); 289 290 if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] && 291 tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) { 292 __be32 saddr; 293 __be32 daddr; 294 295 saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]); 296 daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]); 297 298 metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl, 299 dst_port, flags, 300 key_id, opts_len); 301 } else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] && 302 tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) { 303 struct in6_addr saddr; 304 struct in6_addr daddr; 305 306 saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]); 307 daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]); 308 309 metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port, 310 0, flags, 311 key_id, 0); 312 } else { 313 NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst"); 314 ret = -EINVAL; 315 goto err_out; 316 } 317 318 if (!metadata) { 319 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst"); 320 ret = -ENOMEM; 321 goto err_out; 322 } 323 324 if (opts_len) { 325 ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS], 326 &metadata->u.tun_info, 327 opts_len, extack); 328 if (ret < 0) 329 goto release_tun_meta; 330 } 331 332 metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX; 333 break; 334 default: 335 NL_SET_ERR_MSG(extack, "Unknown tunnel key action"); 336 ret = -EINVAL; 337 goto err_out; 338 } 339 340 if (!exists) { 341 ret = tcf_idr_create(tn, parm->index, est, a, 342 &act_tunnel_key_ops, bind, true); 343 if (ret) { 344 NL_SET_ERR_MSG(extack, "Cannot create TC IDR"); 345 goto release_tun_meta; 346 } 347 348 ret = ACT_P_CREATED; 349 } else if (!ovr) { 350 NL_SET_ERR_MSG(extack, "TC IDR already exists"); 351 ret = -EEXIST; 352 goto release_tun_meta; 353 } 354 355 t = to_tunnel_key(*a); 356 357 params_new = kzalloc(sizeof(*params_new), GFP_KERNEL); 358 if (unlikely(!params_new)) { 359 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters"); 360 ret = -ENOMEM; 361 exists = true; 362 goto release_tun_meta; 363 } 364 params_new->tcft_action = parm->t_action; 365 params_new->tcft_enc_metadata = metadata; 366 367 spin_lock_bh(&t->tcf_lock); 368 t->tcf_action = parm->action; 369 rcu_swap_protected(t->params, params_new, 370 lockdep_is_held(&t->tcf_lock)); 371 spin_unlock_bh(&t->tcf_lock); 372 tunnel_key_release_params(params_new); 373 374 if (ret == ACT_P_CREATED) 375 tcf_idr_insert(tn, *a); 376 377 return ret; 378 379 release_tun_meta: 380 dst_release(&metadata->dst); 381 382 err_out: 383 if (exists) 384 tcf_idr_release(*a, bind); 385 else 386 tcf_idr_cleanup(tn, parm->index); 387 return ret; 388 } 389 390 static void tunnel_key_release(struct tc_action *a) 391 { 392 struct tcf_tunnel_key *t = to_tunnel_key(a); 393 struct tcf_tunnel_key_params *params; 394 395 params = rcu_dereference_protected(t->params, 1); 396 tunnel_key_release_params(params); 397 } 398 399 static int tunnel_key_geneve_opts_dump(struct sk_buff *skb, 400 const struct ip_tunnel_info *info) 401 { 402 int len = info->options_len; 403 u8 *src = (u8 *)(info + 1); 404 struct nlattr *start; 405 406 start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE); 407 if (!start) 408 return -EMSGSIZE; 409 410 while (len > 0) { 411 struct geneve_opt *opt = (struct geneve_opt *)src; 412 413 if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS, 414 opt->opt_class) || 415 nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE, 416 opt->type) || 417 nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA, 418 opt->length * 4, opt + 1)) { 419 nla_nest_cancel(skb, start); 420 return -EMSGSIZE; 421 } 422 423 len -= sizeof(struct geneve_opt) + opt->length * 4; 424 src += sizeof(struct geneve_opt) + opt->length * 4; 425 } 426 427 nla_nest_end(skb, start); 428 return 0; 429 } 430 431 static int tunnel_key_opts_dump(struct sk_buff *skb, 432 const struct ip_tunnel_info *info) 433 { 434 struct nlattr *start; 435 int err = -EINVAL; 436 437 if (!info->options_len) 438 return 0; 439 440 start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS); 441 if (!start) 442 return -EMSGSIZE; 443 444 if (info->key.tun_flags & TUNNEL_GENEVE_OPT) { 445 err = tunnel_key_geneve_opts_dump(skb, info); 446 if (err) 447 goto err_out; 448 } else { 449 err_out: 450 nla_nest_cancel(skb, start); 451 return err; 452 } 453 454 nla_nest_end(skb, start); 455 return 0; 456 } 457 458 static int tunnel_key_dump_addresses(struct sk_buff *skb, 459 const struct ip_tunnel_info *info) 460 { 461 unsigned short family = ip_tunnel_info_af(info); 462 463 if (family == AF_INET) { 464 __be32 saddr = info->key.u.ipv4.src; 465 __be32 daddr = info->key.u.ipv4.dst; 466 467 if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) && 468 !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr)) 469 return 0; 470 } 471 472 if (family == AF_INET6) { 473 const struct in6_addr *saddr6 = &info->key.u.ipv6.src; 474 const struct in6_addr *daddr6 = &info->key.u.ipv6.dst; 475 476 if (!nla_put_in6_addr(skb, 477 TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) && 478 !nla_put_in6_addr(skb, 479 TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6)) 480 return 0; 481 } 482 483 return -EINVAL; 484 } 485 486 static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a, 487 int bind, int ref) 488 { 489 unsigned char *b = skb_tail_pointer(skb); 490 struct tcf_tunnel_key *t = to_tunnel_key(a); 491 struct tcf_tunnel_key_params *params; 492 struct tc_tunnel_key opt = { 493 .index = t->tcf_index, 494 .refcnt = refcount_read(&t->tcf_refcnt) - ref, 495 .bindcnt = atomic_read(&t->tcf_bindcnt) - bind, 496 }; 497 struct tcf_t tm; 498 499 spin_lock_bh(&t->tcf_lock); 500 params = rcu_dereference_protected(t->params, 501 lockdep_is_held(&t->tcf_lock)); 502 opt.action = t->tcf_action; 503 opt.t_action = params->tcft_action; 504 505 if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt)) 506 goto nla_put_failure; 507 508 if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) { 509 struct ip_tunnel_info *info = 510 ¶ms->tcft_enc_metadata->u.tun_info; 511 struct ip_tunnel_key *key = &info->key; 512 __be32 key_id = tunnel_id_to_key32(key->tun_id); 513 514 if (((key->tun_flags & TUNNEL_KEY) && 515 nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) || 516 tunnel_key_dump_addresses(skb, 517 ¶ms->tcft_enc_metadata->u.tun_info) || 518 (key->tp_dst && 519 nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, 520 key->tp_dst)) || 521 nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM, 522 !(key->tun_flags & TUNNEL_CSUM)) || 523 tunnel_key_opts_dump(skb, info)) 524 goto nla_put_failure; 525 526 if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos)) 527 goto nla_put_failure; 528 529 if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl)) 530 goto nla_put_failure; 531 } 532 533 tcf_tm_dump(&tm, &t->tcf_tm); 534 if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm), 535 &tm, TCA_TUNNEL_KEY_PAD)) 536 goto nla_put_failure; 537 spin_unlock_bh(&t->tcf_lock); 538 539 return skb->len; 540 541 nla_put_failure: 542 spin_unlock_bh(&t->tcf_lock); 543 nlmsg_trim(skb, b); 544 return -1; 545 } 546 547 static int tunnel_key_walker(struct net *net, struct sk_buff *skb, 548 struct netlink_callback *cb, int type, 549 const struct tc_action_ops *ops, 550 struct netlink_ext_ack *extack) 551 { 552 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 553 554 return tcf_generic_walker(tn, skb, cb, type, ops, extack); 555 } 556 557 static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index) 558 { 559 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 560 561 return tcf_idr_search(tn, a, index); 562 } 563 564 static struct tc_action_ops act_tunnel_key_ops = { 565 .kind = "tunnel_key", 566 .type = TCA_ACT_TUNNEL_KEY, 567 .owner = THIS_MODULE, 568 .act = tunnel_key_act, 569 .dump = tunnel_key_dump, 570 .init = tunnel_key_init, 571 .cleanup = tunnel_key_release, 572 .walk = tunnel_key_walker, 573 .lookup = tunnel_key_search, 574 .size = sizeof(struct tcf_tunnel_key), 575 }; 576 577 static __net_init int tunnel_key_init_net(struct net *net) 578 { 579 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 580 581 return tc_action_net_init(tn, &act_tunnel_key_ops); 582 } 583 584 static void __net_exit tunnel_key_exit_net(struct list_head *net_list) 585 { 586 tc_action_net_exit(net_list, tunnel_key_net_id); 587 } 588 589 static struct pernet_operations tunnel_key_net_ops = { 590 .init = tunnel_key_init_net, 591 .exit_batch = tunnel_key_exit_net, 592 .id = &tunnel_key_net_id, 593 .size = sizeof(struct tc_action_net), 594 }; 595 596 static int __init tunnel_key_init_module(void) 597 { 598 return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops); 599 } 600 601 static void __exit tunnel_key_cleanup_module(void) 602 { 603 tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops); 604 } 605 606 module_init(tunnel_key_init_module); 607 module_exit(tunnel_key_cleanup_module); 608 609 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>"); 610 MODULE_DESCRIPTION("ip tunnel manipulation actions"); 611 MODULE_LICENSE("GPL v2"); 612