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); 206 207 kfree_rcu(p, rcu); 208 } 209 210 static int tunnel_key_init(struct net *net, struct nlattr *nla, 211 struct nlattr *est, struct tc_action **a, 212 int ovr, int bind, bool rtnl_held, 213 struct netlink_ext_ack *extack) 214 { 215 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 216 struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1]; 217 struct tcf_tunnel_key_params *params_new; 218 struct metadata_dst *metadata = NULL; 219 struct tc_tunnel_key *parm; 220 struct tcf_tunnel_key *t; 221 bool exists = false; 222 __be16 dst_port = 0; 223 __be64 key_id = 0; 224 int opts_len = 0; 225 __be16 flags = 0; 226 u8 tos, ttl; 227 int ret = 0; 228 int err; 229 230 if (!nla) { 231 NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed"); 232 return -EINVAL; 233 } 234 235 err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy, 236 extack); 237 if (err < 0) { 238 NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes"); 239 return err; 240 } 241 242 if (!tb[TCA_TUNNEL_KEY_PARMS]) { 243 NL_SET_ERR_MSG(extack, "Missing tunnel key parameters"); 244 return -EINVAL; 245 } 246 247 parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]); 248 err = tcf_idr_check_alloc(tn, &parm->index, a, bind); 249 if (err < 0) 250 return err; 251 exists = err; 252 if (exists && bind) 253 return 0; 254 255 switch (parm->t_action) { 256 case TCA_TUNNEL_KEY_ACT_RELEASE: 257 break; 258 case TCA_TUNNEL_KEY_ACT_SET: 259 if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) { 260 __be32 key32; 261 262 key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]); 263 key_id = key32_to_tunnel_id(key32); 264 flags = TUNNEL_KEY; 265 } 266 267 flags |= TUNNEL_CSUM; 268 if (tb[TCA_TUNNEL_KEY_NO_CSUM] && 269 nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM])) 270 flags &= ~TUNNEL_CSUM; 271 272 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT]) 273 dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]); 274 275 if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) { 276 opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS], 277 extack); 278 if (opts_len < 0) { 279 ret = opts_len; 280 goto err_out; 281 } 282 } 283 284 tos = 0; 285 if (tb[TCA_TUNNEL_KEY_ENC_TOS]) 286 tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]); 287 ttl = 0; 288 if (tb[TCA_TUNNEL_KEY_ENC_TTL]) 289 ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]); 290 291 if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] && 292 tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) { 293 __be32 saddr; 294 __be32 daddr; 295 296 saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]); 297 daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]); 298 299 metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl, 300 dst_port, flags, 301 key_id, opts_len); 302 } else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] && 303 tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) { 304 struct in6_addr saddr; 305 struct in6_addr daddr; 306 307 saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]); 308 daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]); 309 310 metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port, 311 0, flags, 312 key_id, 0); 313 } else { 314 NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst"); 315 ret = -EINVAL; 316 goto err_out; 317 } 318 319 if (!metadata) { 320 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst"); 321 ret = -ENOMEM; 322 goto err_out; 323 } 324 325 #ifdef CONFIG_DST_CACHE 326 ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL); 327 if (ret) 328 goto release_tun_meta; 329 #endif 330 331 if (opts_len) { 332 ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS], 333 &metadata->u.tun_info, 334 opts_len, extack); 335 if (ret < 0) 336 goto release_tun_meta; 337 } 338 339 metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX; 340 break; 341 default: 342 NL_SET_ERR_MSG(extack, "Unknown tunnel key action"); 343 ret = -EINVAL; 344 goto err_out; 345 } 346 347 if (!exists) { 348 ret = tcf_idr_create(tn, parm->index, est, a, 349 &act_tunnel_key_ops, bind, true); 350 if (ret) { 351 NL_SET_ERR_MSG(extack, "Cannot create TC IDR"); 352 goto release_tun_meta; 353 } 354 355 ret = ACT_P_CREATED; 356 } else if (!ovr) { 357 NL_SET_ERR_MSG(extack, "TC IDR already exists"); 358 ret = -EEXIST; 359 goto release_tun_meta; 360 } 361 362 t = to_tunnel_key(*a); 363 364 params_new = kzalloc(sizeof(*params_new), GFP_KERNEL); 365 if (unlikely(!params_new)) { 366 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters"); 367 ret = -ENOMEM; 368 exists = true; 369 goto release_tun_meta; 370 } 371 params_new->tcft_action = parm->t_action; 372 params_new->tcft_enc_metadata = metadata; 373 374 spin_lock_bh(&t->tcf_lock); 375 t->tcf_action = parm->action; 376 rcu_swap_protected(t->params, params_new, 377 lockdep_is_held(&t->tcf_lock)); 378 spin_unlock_bh(&t->tcf_lock); 379 tunnel_key_release_params(params_new); 380 381 if (ret == ACT_P_CREATED) 382 tcf_idr_insert(tn, *a); 383 384 return ret; 385 386 release_tun_meta: 387 if (metadata) 388 dst_release(&metadata->dst); 389 390 err_out: 391 if (exists) 392 tcf_idr_release(*a, bind); 393 else 394 tcf_idr_cleanup(tn, parm->index); 395 return ret; 396 } 397 398 static void tunnel_key_release(struct tc_action *a) 399 { 400 struct tcf_tunnel_key *t = to_tunnel_key(a); 401 struct tcf_tunnel_key_params *params; 402 403 params = rcu_dereference_protected(t->params, 1); 404 tunnel_key_release_params(params); 405 } 406 407 static int tunnel_key_geneve_opts_dump(struct sk_buff *skb, 408 const struct ip_tunnel_info *info) 409 { 410 int len = info->options_len; 411 u8 *src = (u8 *)(info + 1); 412 struct nlattr *start; 413 414 start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE); 415 if (!start) 416 return -EMSGSIZE; 417 418 while (len > 0) { 419 struct geneve_opt *opt = (struct geneve_opt *)src; 420 421 if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS, 422 opt->opt_class) || 423 nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE, 424 opt->type) || 425 nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA, 426 opt->length * 4, opt + 1)) { 427 nla_nest_cancel(skb, start); 428 return -EMSGSIZE; 429 } 430 431 len -= sizeof(struct geneve_opt) + opt->length * 4; 432 src += sizeof(struct geneve_opt) + opt->length * 4; 433 } 434 435 nla_nest_end(skb, start); 436 return 0; 437 } 438 439 static int tunnel_key_opts_dump(struct sk_buff *skb, 440 const struct ip_tunnel_info *info) 441 { 442 struct nlattr *start; 443 int err = -EINVAL; 444 445 if (!info->options_len) 446 return 0; 447 448 start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS); 449 if (!start) 450 return -EMSGSIZE; 451 452 if (info->key.tun_flags & TUNNEL_GENEVE_OPT) { 453 err = tunnel_key_geneve_opts_dump(skb, info); 454 if (err) 455 goto err_out; 456 } else { 457 err_out: 458 nla_nest_cancel(skb, start); 459 return err; 460 } 461 462 nla_nest_end(skb, start); 463 return 0; 464 } 465 466 static int tunnel_key_dump_addresses(struct sk_buff *skb, 467 const struct ip_tunnel_info *info) 468 { 469 unsigned short family = ip_tunnel_info_af(info); 470 471 if (family == AF_INET) { 472 __be32 saddr = info->key.u.ipv4.src; 473 __be32 daddr = info->key.u.ipv4.dst; 474 475 if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) && 476 !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr)) 477 return 0; 478 } 479 480 if (family == AF_INET6) { 481 const struct in6_addr *saddr6 = &info->key.u.ipv6.src; 482 const struct in6_addr *daddr6 = &info->key.u.ipv6.dst; 483 484 if (!nla_put_in6_addr(skb, 485 TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) && 486 !nla_put_in6_addr(skb, 487 TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6)) 488 return 0; 489 } 490 491 return -EINVAL; 492 } 493 494 static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a, 495 int bind, int ref) 496 { 497 unsigned char *b = skb_tail_pointer(skb); 498 struct tcf_tunnel_key *t = to_tunnel_key(a); 499 struct tcf_tunnel_key_params *params; 500 struct tc_tunnel_key opt = { 501 .index = t->tcf_index, 502 .refcnt = refcount_read(&t->tcf_refcnt) - ref, 503 .bindcnt = atomic_read(&t->tcf_bindcnt) - bind, 504 }; 505 struct tcf_t tm; 506 507 spin_lock_bh(&t->tcf_lock); 508 params = rcu_dereference_protected(t->params, 509 lockdep_is_held(&t->tcf_lock)); 510 opt.action = t->tcf_action; 511 opt.t_action = params->tcft_action; 512 513 if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt)) 514 goto nla_put_failure; 515 516 if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) { 517 struct ip_tunnel_info *info = 518 ¶ms->tcft_enc_metadata->u.tun_info; 519 struct ip_tunnel_key *key = &info->key; 520 __be32 key_id = tunnel_id_to_key32(key->tun_id); 521 522 if (((key->tun_flags & TUNNEL_KEY) && 523 nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) || 524 tunnel_key_dump_addresses(skb, 525 ¶ms->tcft_enc_metadata->u.tun_info) || 526 (key->tp_dst && 527 nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, 528 key->tp_dst)) || 529 nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM, 530 !(key->tun_flags & TUNNEL_CSUM)) || 531 tunnel_key_opts_dump(skb, info)) 532 goto nla_put_failure; 533 534 if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos)) 535 goto nla_put_failure; 536 537 if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl)) 538 goto nla_put_failure; 539 } 540 541 tcf_tm_dump(&tm, &t->tcf_tm); 542 if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm), 543 &tm, TCA_TUNNEL_KEY_PAD)) 544 goto nla_put_failure; 545 spin_unlock_bh(&t->tcf_lock); 546 547 return skb->len; 548 549 nla_put_failure: 550 spin_unlock_bh(&t->tcf_lock); 551 nlmsg_trim(skb, b); 552 return -1; 553 } 554 555 static int tunnel_key_walker(struct net *net, struct sk_buff *skb, 556 struct netlink_callback *cb, int type, 557 const struct tc_action_ops *ops, 558 struct netlink_ext_ack *extack) 559 { 560 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 561 562 return tcf_generic_walker(tn, skb, cb, type, ops, extack); 563 } 564 565 static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index) 566 { 567 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 568 569 return tcf_idr_search(tn, a, index); 570 } 571 572 static struct tc_action_ops act_tunnel_key_ops = { 573 .kind = "tunnel_key", 574 .id = TCA_ID_TUNNEL_KEY, 575 .owner = THIS_MODULE, 576 .act = tunnel_key_act, 577 .dump = tunnel_key_dump, 578 .init = tunnel_key_init, 579 .cleanup = tunnel_key_release, 580 .walk = tunnel_key_walker, 581 .lookup = tunnel_key_search, 582 .size = sizeof(struct tcf_tunnel_key), 583 }; 584 585 static __net_init int tunnel_key_init_net(struct net *net) 586 { 587 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 588 589 return tc_action_net_init(tn, &act_tunnel_key_ops); 590 } 591 592 static void __net_exit tunnel_key_exit_net(struct list_head *net_list) 593 { 594 tc_action_net_exit(net_list, tunnel_key_net_id); 595 } 596 597 static struct pernet_operations tunnel_key_net_ops = { 598 .init = tunnel_key_init_net, 599 .exit_batch = tunnel_key_exit_net, 600 .id = &tunnel_key_net_id, 601 .size = sizeof(struct tc_action_net), 602 }; 603 604 static int __init tunnel_key_init_module(void) 605 { 606 return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops); 607 } 608 609 static void __exit tunnel_key_cleanup_module(void) 610 { 611 tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops); 612 } 613 614 module_init(tunnel_key_init_module); 615 module_exit(tunnel_key_cleanup_module); 616 617 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>"); 618 MODULE_DESCRIPTION("ip tunnel manipulation actions"); 619 MODULE_LICENSE("GPL v2"); 620