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 int tunnel_key_init(struct net *net, struct nlattr *nla, 201 struct nlattr *est, struct tc_action **a, 202 int ovr, int bind, bool rtnl_held, 203 struct netlink_ext_ack *extack) 204 { 205 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 206 struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1]; 207 struct tcf_tunnel_key_params *params_new; 208 struct metadata_dst *metadata = NULL; 209 struct tc_tunnel_key *parm; 210 struct tcf_tunnel_key *t; 211 bool exists = false; 212 __be16 dst_port = 0; 213 int opts_len = 0; 214 __be64 key_id; 215 __be16 flags; 216 u8 tos, ttl; 217 int ret = 0; 218 int err; 219 220 if (!nla) { 221 NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed"); 222 return -EINVAL; 223 } 224 225 err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy, 226 extack); 227 if (err < 0) { 228 NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes"); 229 return err; 230 } 231 232 if (!tb[TCA_TUNNEL_KEY_PARMS]) { 233 NL_SET_ERR_MSG(extack, "Missing tunnel key parameters"); 234 return -EINVAL; 235 } 236 237 parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]); 238 err = tcf_idr_check_alloc(tn, &parm->index, a, bind); 239 if (err < 0) 240 return err; 241 exists = err; 242 if (exists && bind) 243 return 0; 244 245 switch (parm->t_action) { 246 case TCA_TUNNEL_KEY_ACT_RELEASE: 247 break; 248 case TCA_TUNNEL_KEY_ACT_SET: 249 if (!tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) { 250 NL_SET_ERR_MSG(extack, "Missing tunnel key id"); 251 ret = -EINVAL; 252 goto err_out; 253 } 254 255 key_id = key32_to_tunnel_id(nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID])); 256 257 flags = TUNNEL_KEY | TUNNEL_CSUM; 258 if (tb[TCA_TUNNEL_KEY_NO_CSUM] && 259 nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM])) 260 flags &= ~TUNNEL_CSUM; 261 262 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT]) 263 dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]); 264 265 if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) { 266 opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS], 267 extack); 268 if (opts_len < 0) { 269 ret = opts_len; 270 goto err_out; 271 } 272 } 273 274 tos = 0; 275 if (tb[TCA_TUNNEL_KEY_ENC_TOS]) 276 tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]); 277 ttl = 0; 278 if (tb[TCA_TUNNEL_KEY_ENC_TTL]) 279 ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]); 280 281 if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] && 282 tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) { 283 __be32 saddr; 284 __be32 daddr; 285 286 saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]); 287 daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]); 288 289 metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl, 290 dst_port, flags, 291 key_id, opts_len); 292 } else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] && 293 tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) { 294 struct in6_addr saddr; 295 struct in6_addr daddr; 296 297 saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]); 298 daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]); 299 300 metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port, 301 0, flags, 302 key_id, 0); 303 } else { 304 NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst"); 305 ret = -EINVAL; 306 goto err_out; 307 } 308 309 if (!metadata) { 310 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst"); 311 ret = -ENOMEM; 312 goto err_out; 313 } 314 315 if (opts_len) { 316 ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS], 317 &metadata->u.tun_info, 318 opts_len, extack); 319 if (ret < 0) 320 goto err_out; 321 } 322 323 metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX; 324 break; 325 default: 326 NL_SET_ERR_MSG(extack, "Unknown tunnel key action"); 327 ret = -EINVAL; 328 goto err_out; 329 } 330 331 if (!exists) { 332 ret = tcf_idr_create(tn, parm->index, est, a, 333 &act_tunnel_key_ops, bind, true); 334 if (ret) { 335 NL_SET_ERR_MSG(extack, "Cannot create TC IDR"); 336 goto err_out; 337 } 338 339 ret = ACT_P_CREATED; 340 } else if (!ovr) { 341 tcf_idr_release(*a, bind); 342 NL_SET_ERR_MSG(extack, "TC IDR already exists"); 343 return -EEXIST; 344 } 345 346 t = to_tunnel_key(*a); 347 348 params_new = kzalloc(sizeof(*params_new), GFP_KERNEL); 349 if (unlikely(!params_new)) { 350 tcf_idr_release(*a, bind); 351 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters"); 352 return -ENOMEM; 353 } 354 params_new->tcft_action = parm->t_action; 355 params_new->tcft_enc_metadata = metadata; 356 357 spin_lock_bh(&t->tcf_lock); 358 t->tcf_action = parm->action; 359 rcu_swap_protected(t->params, params_new, 360 lockdep_is_held(&t->tcf_lock)); 361 spin_unlock_bh(&t->tcf_lock); 362 if (params_new) 363 kfree_rcu(params_new, rcu); 364 365 if (ret == ACT_P_CREATED) 366 tcf_idr_insert(tn, *a); 367 368 return ret; 369 370 err_out: 371 if (exists) 372 tcf_idr_release(*a, bind); 373 else 374 tcf_idr_cleanup(tn, parm->index); 375 return ret; 376 } 377 378 static void tunnel_key_release(struct tc_action *a) 379 { 380 struct tcf_tunnel_key *t = to_tunnel_key(a); 381 struct tcf_tunnel_key_params *params; 382 383 params = rcu_dereference_protected(t->params, 1); 384 if (params) { 385 if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) 386 dst_release(¶ms->tcft_enc_metadata->dst); 387 388 kfree_rcu(params, rcu); 389 } 390 } 391 392 static int tunnel_key_geneve_opts_dump(struct sk_buff *skb, 393 const struct ip_tunnel_info *info) 394 { 395 int len = info->options_len; 396 u8 *src = (u8 *)(info + 1); 397 struct nlattr *start; 398 399 start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE); 400 if (!start) 401 return -EMSGSIZE; 402 403 while (len > 0) { 404 struct geneve_opt *opt = (struct geneve_opt *)src; 405 406 if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS, 407 opt->opt_class) || 408 nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE, 409 opt->type) || 410 nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA, 411 opt->length * 4, opt + 1)) 412 return -EMSGSIZE; 413 414 len -= sizeof(struct geneve_opt) + opt->length * 4; 415 src += sizeof(struct geneve_opt) + opt->length * 4; 416 } 417 418 nla_nest_end(skb, start); 419 return 0; 420 } 421 422 static int tunnel_key_opts_dump(struct sk_buff *skb, 423 const struct ip_tunnel_info *info) 424 { 425 struct nlattr *start; 426 int err; 427 428 if (!info->options_len) 429 return 0; 430 431 start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS); 432 if (!start) 433 return -EMSGSIZE; 434 435 if (info->key.tun_flags & TUNNEL_GENEVE_OPT) { 436 err = tunnel_key_geneve_opts_dump(skb, info); 437 if (err) 438 return err; 439 } else { 440 return -EINVAL; 441 } 442 443 nla_nest_end(skb, start); 444 return 0; 445 } 446 447 static int tunnel_key_dump_addresses(struct sk_buff *skb, 448 const struct ip_tunnel_info *info) 449 { 450 unsigned short family = ip_tunnel_info_af(info); 451 452 if (family == AF_INET) { 453 __be32 saddr = info->key.u.ipv4.src; 454 __be32 daddr = info->key.u.ipv4.dst; 455 456 if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) && 457 !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr)) 458 return 0; 459 } 460 461 if (family == AF_INET6) { 462 const struct in6_addr *saddr6 = &info->key.u.ipv6.src; 463 const struct in6_addr *daddr6 = &info->key.u.ipv6.dst; 464 465 if (!nla_put_in6_addr(skb, 466 TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) && 467 !nla_put_in6_addr(skb, 468 TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6)) 469 return 0; 470 } 471 472 return -EINVAL; 473 } 474 475 static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a, 476 int bind, int ref) 477 { 478 unsigned char *b = skb_tail_pointer(skb); 479 struct tcf_tunnel_key *t = to_tunnel_key(a); 480 struct tcf_tunnel_key_params *params; 481 struct tc_tunnel_key opt = { 482 .index = t->tcf_index, 483 .refcnt = refcount_read(&t->tcf_refcnt) - ref, 484 .bindcnt = atomic_read(&t->tcf_bindcnt) - bind, 485 }; 486 struct tcf_t tm; 487 488 spin_lock_bh(&t->tcf_lock); 489 params = rcu_dereference_protected(t->params, 490 lockdep_is_held(&t->tcf_lock)); 491 opt.action = t->tcf_action; 492 opt.t_action = params->tcft_action; 493 494 if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt)) 495 goto nla_put_failure; 496 497 if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) { 498 struct ip_tunnel_info *info = 499 ¶ms->tcft_enc_metadata->u.tun_info; 500 struct ip_tunnel_key *key = &info->key; 501 __be32 key_id = tunnel_id_to_key32(key->tun_id); 502 503 if (nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id) || 504 tunnel_key_dump_addresses(skb, 505 ¶ms->tcft_enc_metadata->u.tun_info) || 506 nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, key->tp_dst) || 507 nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM, 508 !(key->tun_flags & TUNNEL_CSUM)) || 509 tunnel_key_opts_dump(skb, info)) 510 goto nla_put_failure; 511 512 if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos)) 513 goto nla_put_failure; 514 515 if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl)) 516 goto nla_put_failure; 517 } 518 519 tcf_tm_dump(&tm, &t->tcf_tm); 520 if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm), 521 &tm, TCA_TUNNEL_KEY_PAD)) 522 goto nla_put_failure; 523 spin_unlock_bh(&t->tcf_lock); 524 525 return skb->len; 526 527 nla_put_failure: 528 spin_unlock_bh(&t->tcf_lock); 529 nlmsg_trim(skb, b); 530 return -1; 531 } 532 533 static int tunnel_key_walker(struct net *net, struct sk_buff *skb, 534 struct netlink_callback *cb, int type, 535 const struct tc_action_ops *ops, 536 struct netlink_ext_ack *extack) 537 { 538 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 539 540 return tcf_generic_walker(tn, skb, cb, type, ops, extack); 541 } 542 543 static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index, 544 struct netlink_ext_ack *extack) 545 { 546 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 547 548 return tcf_idr_search(tn, a, index); 549 } 550 551 static int tunnel_key_delete(struct net *net, u32 index) 552 { 553 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 554 555 return tcf_idr_delete_index(tn, index); 556 } 557 558 static struct tc_action_ops act_tunnel_key_ops = { 559 .kind = "tunnel_key", 560 .type = TCA_ACT_TUNNEL_KEY, 561 .owner = THIS_MODULE, 562 .act = tunnel_key_act, 563 .dump = tunnel_key_dump, 564 .init = tunnel_key_init, 565 .cleanup = tunnel_key_release, 566 .walk = tunnel_key_walker, 567 .lookup = tunnel_key_search, 568 .delete = tunnel_key_delete, 569 .size = sizeof(struct tcf_tunnel_key), 570 }; 571 572 static __net_init int tunnel_key_init_net(struct net *net) 573 { 574 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 575 576 return tc_action_net_init(tn, &act_tunnel_key_ops); 577 } 578 579 static void __net_exit tunnel_key_exit_net(struct list_head *net_list) 580 { 581 tc_action_net_exit(net_list, tunnel_key_net_id); 582 } 583 584 static struct pernet_operations tunnel_key_net_ops = { 585 .init = tunnel_key_init_net, 586 .exit_batch = tunnel_key_exit_net, 587 .id = &tunnel_key_net_id, 588 .size = sizeof(struct tc_action_net), 589 }; 590 591 static int __init tunnel_key_init_module(void) 592 { 593 return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops); 594 } 595 596 static void __exit tunnel_key_cleanup_module(void) 597 { 598 tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops); 599 } 600 601 module_init(tunnel_key_init_module); 602 module_exit(tunnel_key_cleanup_module); 603 604 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>"); 605 MODULE_DESCRIPTION("ip tunnel manipulation actions"); 606 MODULE_LICENSE("GPL v2"); 607