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 #include <net/pkt_cls.h> 21 22 #include <linux/tc_act/tc_tunnel_key.h> 23 #include <net/tc_act/tc_tunnel_key.h> 24 25 static unsigned int tunnel_key_net_id; 26 static struct tc_action_ops act_tunnel_key_ops; 27 28 static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a, 29 struct tcf_result *res) 30 { 31 struct tcf_tunnel_key *t = to_tunnel_key(a); 32 struct tcf_tunnel_key_params *params; 33 int action; 34 35 params = rcu_dereference_bh(t->params); 36 37 tcf_lastuse_update(&t->tcf_tm); 38 bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb); 39 action = READ_ONCE(t->tcf_action); 40 41 switch (params->tcft_action) { 42 case TCA_TUNNEL_KEY_ACT_RELEASE: 43 skb_dst_drop(skb); 44 break; 45 case TCA_TUNNEL_KEY_ACT_SET: 46 skb_dst_drop(skb); 47 skb_dst_set(skb, dst_clone(¶ms->tcft_enc_metadata->dst)); 48 break; 49 default: 50 WARN_ONCE(1, "Bad tunnel_key action %d.\n", 51 params->tcft_action); 52 break; 53 } 54 55 return action; 56 } 57 58 static const struct nla_policy 59 enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = { 60 [TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 61 }; 62 63 static const struct nla_policy 64 geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = { 65 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 66 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 67 [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 68 .len = 128 }, 69 }; 70 71 static int 72 tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len, 73 struct netlink_ext_ack *extack) 74 { 75 struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1]; 76 int err, data_len, opt_len; 77 u8 *data; 78 79 err = nla_parse_nested_deprecated(tb, 80 TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX, 81 nla, geneve_opt_policy, extack); 82 if (err < 0) 83 return err; 84 85 if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] || 86 !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] || 87 !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) { 88 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 89 return -EINVAL; 90 } 91 92 data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]); 93 data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]); 94 if (data_len < 4) { 95 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 96 return -ERANGE; 97 } 98 if (data_len % 4) { 99 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 100 return -ERANGE; 101 } 102 103 opt_len = sizeof(struct geneve_opt) + data_len; 104 if (dst) { 105 struct geneve_opt *opt = dst; 106 107 WARN_ON(dst_len < opt_len); 108 109 opt->opt_class = 110 nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]); 111 opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]); 112 opt->length = data_len / 4; /* length is in units of 4 bytes */ 113 opt->r1 = 0; 114 opt->r2 = 0; 115 opt->r3 = 0; 116 117 memcpy(opt + 1, data, data_len); 118 } 119 120 return opt_len; 121 } 122 123 static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst, 124 int dst_len, struct netlink_ext_ack *extack) 125 { 126 int err, rem, opt_len, len = nla_len(nla), opts_len = 0; 127 const struct nlattr *attr, *head = nla_data(nla); 128 129 err = nla_validate_deprecated(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX, 130 enc_opts_policy, extack); 131 if (err) 132 return err; 133 134 nla_for_each_attr(attr, head, len, rem) { 135 switch (nla_type(attr)) { 136 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE: 137 opt_len = tunnel_key_copy_geneve_opt(attr, dst, 138 dst_len, extack); 139 if (opt_len < 0) 140 return opt_len; 141 opts_len += opt_len; 142 if (dst) { 143 dst_len -= opt_len; 144 dst += opt_len; 145 } 146 break; 147 } 148 } 149 150 if (!opts_len) { 151 NL_SET_ERR_MSG(extack, "Empty list of tunnel options"); 152 return -EINVAL; 153 } 154 155 if (rem > 0) { 156 NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes"); 157 return -EINVAL; 158 } 159 160 return opts_len; 161 } 162 163 static int tunnel_key_get_opts_len(struct nlattr *nla, 164 struct netlink_ext_ack *extack) 165 { 166 return tunnel_key_copy_opts(nla, NULL, 0, extack); 167 } 168 169 static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info, 170 int opts_len, struct netlink_ext_ack *extack) 171 { 172 info->options_len = opts_len; 173 switch (nla_type(nla_data(nla))) { 174 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE: 175 #if IS_ENABLED(CONFIG_INET) 176 info->key.tun_flags |= TUNNEL_GENEVE_OPT; 177 return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info), 178 opts_len, extack); 179 #else 180 return -EAFNOSUPPORT; 181 #endif 182 default: 183 NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type"); 184 return -EINVAL; 185 } 186 } 187 188 static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = { 189 [TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) }, 190 [TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 191 [TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 192 [TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 193 [TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 194 [TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 195 [TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16}, 196 [TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 }, 197 [TCA_TUNNEL_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 198 [TCA_TUNNEL_KEY_ENC_TOS] = { .type = NLA_U8 }, 199 [TCA_TUNNEL_KEY_ENC_TTL] = { .type = NLA_U8 }, 200 }; 201 202 static void tunnel_key_release_params(struct tcf_tunnel_key_params *p) 203 { 204 if (!p) 205 return; 206 if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET) 207 dst_release(&p->tcft_enc_metadata->dst); 208 209 kfree_rcu(p, rcu); 210 } 211 212 static int tunnel_key_init(struct net *net, struct nlattr *nla, 213 struct nlattr *est, struct tc_action **a, 214 int ovr, int bind, bool rtnl_held, 215 struct tcf_proto *tp, 216 struct netlink_ext_ack *extack) 217 { 218 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 219 struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1]; 220 struct tcf_tunnel_key_params *params_new; 221 struct metadata_dst *metadata = NULL; 222 struct tcf_chain *goto_ch = NULL; 223 struct tc_tunnel_key *parm; 224 struct tcf_tunnel_key *t; 225 bool exists = false; 226 __be16 dst_port = 0; 227 __be64 key_id = 0; 228 int opts_len = 0; 229 __be16 flags = 0; 230 u8 tos, ttl; 231 int ret = 0; 232 int err; 233 234 if (!nla) { 235 NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed"); 236 return -EINVAL; 237 } 238 239 err = nla_parse_nested_deprecated(tb, TCA_TUNNEL_KEY_MAX, nla, 240 tunnel_key_policy, extack); 241 if (err < 0) { 242 NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes"); 243 return err; 244 } 245 246 if (!tb[TCA_TUNNEL_KEY_PARMS]) { 247 NL_SET_ERR_MSG(extack, "Missing tunnel key parameters"); 248 return -EINVAL; 249 } 250 251 parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]); 252 err = tcf_idr_check_alloc(tn, &parm->index, a, bind); 253 if (err < 0) 254 return err; 255 exists = err; 256 if (exists && bind) 257 return 0; 258 259 switch (parm->t_action) { 260 case TCA_TUNNEL_KEY_ACT_RELEASE: 261 break; 262 case TCA_TUNNEL_KEY_ACT_SET: 263 if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) { 264 __be32 key32; 265 266 key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]); 267 key_id = key32_to_tunnel_id(key32); 268 flags = TUNNEL_KEY; 269 } 270 271 flags |= TUNNEL_CSUM; 272 if (tb[TCA_TUNNEL_KEY_NO_CSUM] && 273 nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM])) 274 flags &= ~TUNNEL_CSUM; 275 276 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT]) 277 dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]); 278 279 if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) { 280 opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS], 281 extack); 282 if (opts_len < 0) { 283 ret = opts_len; 284 goto err_out; 285 } 286 } 287 288 tos = 0; 289 if (tb[TCA_TUNNEL_KEY_ENC_TOS]) 290 tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]); 291 ttl = 0; 292 if (tb[TCA_TUNNEL_KEY_ENC_TTL]) 293 ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]); 294 295 if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] && 296 tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) { 297 __be32 saddr; 298 __be32 daddr; 299 300 saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]); 301 daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]); 302 303 metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl, 304 dst_port, flags, 305 key_id, opts_len); 306 } else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] && 307 tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) { 308 struct in6_addr saddr; 309 struct in6_addr daddr; 310 311 saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]); 312 daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]); 313 314 metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port, 315 0, flags, 316 key_id, 0); 317 } else { 318 NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst"); 319 ret = -EINVAL; 320 goto err_out; 321 } 322 323 if (!metadata) { 324 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst"); 325 ret = -ENOMEM; 326 goto err_out; 327 } 328 329 #ifdef CONFIG_DST_CACHE 330 ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL); 331 if (ret) 332 goto release_tun_meta; 333 #endif 334 335 if (opts_len) { 336 ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS], 337 &metadata->u.tun_info, 338 opts_len, extack); 339 if (ret < 0) 340 goto release_tun_meta; 341 } 342 343 metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX; 344 break; 345 default: 346 NL_SET_ERR_MSG(extack, "Unknown tunnel key action"); 347 ret = -EINVAL; 348 goto err_out; 349 } 350 351 if (!exists) { 352 ret = tcf_idr_create(tn, parm->index, est, a, 353 &act_tunnel_key_ops, bind, true); 354 if (ret) { 355 NL_SET_ERR_MSG(extack, "Cannot create TC IDR"); 356 goto release_tun_meta; 357 } 358 359 ret = ACT_P_CREATED; 360 } else if (!ovr) { 361 NL_SET_ERR_MSG(extack, "TC IDR already exists"); 362 ret = -EEXIST; 363 goto release_tun_meta; 364 } 365 366 err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack); 367 if (err < 0) { 368 ret = err; 369 exists = true; 370 goto release_tun_meta; 371 } 372 t = to_tunnel_key(*a); 373 374 params_new = kzalloc(sizeof(*params_new), GFP_KERNEL); 375 if (unlikely(!params_new)) { 376 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters"); 377 ret = -ENOMEM; 378 exists = true; 379 goto put_chain; 380 } 381 params_new->tcft_action = parm->t_action; 382 params_new->tcft_enc_metadata = metadata; 383 384 spin_lock_bh(&t->tcf_lock); 385 goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); 386 rcu_swap_protected(t->params, params_new, 387 lockdep_is_held(&t->tcf_lock)); 388 spin_unlock_bh(&t->tcf_lock); 389 tunnel_key_release_params(params_new); 390 if (goto_ch) 391 tcf_chain_put_by_act(goto_ch); 392 393 if (ret == ACT_P_CREATED) 394 tcf_idr_insert(tn, *a); 395 396 return ret; 397 398 put_chain: 399 if (goto_ch) 400 tcf_chain_put_by_act(goto_ch); 401 402 release_tun_meta: 403 if (metadata) 404 dst_release(&metadata->dst); 405 406 err_out: 407 if (exists) 408 tcf_idr_release(*a, bind); 409 else 410 tcf_idr_cleanup(tn, parm->index); 411 return ret; 412 } 413 414 static void tunnel_key_release(struct tc_action *a) 415 { 416 struct tcf_tunnel_key *t = to_tunnel_key(a); 417 struct tcf_tunnel_key_params *params; 418 419 params = rcu_dereference_protected(t->params, 1); 420 tunnel_key_release_params(params); 421 } 422 423 static int tunnel_key_geneve_opts_dump(struct sk_buff *skb, 424 const struct ip_tunnel_info *info) 425 { 426 int len = info->options_len; 427 u8 *src = (u8 *)(info + 1); 428 struct nlattr *start; 429 430 start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE); 431 if (!start) 432 return -EMSGSIZE; 433 434 while (len > 0) { 435 struct geneve_opt *opt = (struct geneve_opt *)src; 436 437 if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS, 438 opt->opt_class) || 439 nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE, 440 opt->type) || 441 nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA, 442 opt->length * 4, opt + 1)) { 443 nla_nest_cancel(skb, start); 444 return -EMSGSIZE; 445 } 446 447 len -= sizeof(struct geneve_opt) + opt->length * 4; 448 src += sizeof(struct geneve_opt) + opt->length * 4; 449 } 450 451 nla_nest_end(skb, start); 452 return 0; 453 } 454 455 static int tunnel_key_opts_dump(struct sk_buff *skb, 456 const struct ip_tunnel_info *info) 457 { 458 struct nlattr *start; 459 int err = -EINVAL; 460 461 if (!info->options_len) 462 return 0; 463 464 start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS); 465 if (!start) 466 return -EMSGSIZE; 467 468 if (info->key.tun_flags & TUNNEL_GENEVE_OPT) { 469 err = tunnel_key_geneve_opts_dump(skb, info); 470 if (err) 471 goto err_out; 472 } else { 473 err_out: 474 nla_nest_cancel(skb, start); 475 return err; 476 } 477 478 nla_nest_end(skb, start); 479 return 0; 480 } 481 482 static int tunnel_key_dump_addresses(struct sk_buff *skb, 483 const struct ip_tunnel_info *info) 484 { 485 unsigned short family = ip_tunnel_info_af(info); 486 487 if (family == AF_INET) { 488 __be32 saddr = info->key.u.ipv4.src; 489 __be32 daddr = info->key.u.ipv4.dst; 490 491 if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) && 492 !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr)) 493 return 0; 494 } 495 496 if (family == AF_INET6) { 497 const struct in6_addr *saddr6 = &info->key.u.ipv6.src; 498 const struct in6_addr *daddr6 = &info->key.u.ipv6.dst; 499 500 if (!nla_put_in6_addr(skb, 501 TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) && 502 !nla_put_in6_addr(skb, 503 TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6)) 504 return 0; 505 } 506 507 return -EINVAL; 508 } 509 510 static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a, 511 int bind, int ref) 512 { 513 unsigned char *b = skb_tail_pointer(skb); 514 struct tcf_tunnel_key *t = to_tunnel_key(a); 515 struct tcf_tunnel_key_params *params; 516 struct tc_tunnel_key opt = { 517 .index = t->tcf_index, 518 .refcnt = refcount_read(&t->tcf_refcnt) - ref, 519 .bindcnt = atomic_read(&t->tcf_bindcnt) - bind, 520 }; 521 struct tcf_t tm; 522 523 spin_lock_bh(&t->tcf_lock); 524 params = rcu_dereference_protected(t->params, 525 lockdep_is_held(&t->tcf_lock)); 526 opt.action = t->tcf_action; 527 opt.t_action = params->tcft_action; 528 529 if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt)) 530 goto nla_put_failure; 531 532 if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) { 533 struct ip_tunnel_info *info = 534 ¶ms->tcft_enc_metadata->u.tun_info; 535 struct ip_tunnel_key *key = &info->key; 536 __be32 key_id = tunnel_id_to_key32(key->tun_id); 537 538 if (((key->tun_flags & TUNNEL_KEY) && 539 nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) || 540 tunnel_key_dump_addresses(skb, 541 ¶ms->tcft_enc_metadata->u.tun_info) || 542 (key->tp_dst && 543 nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, 544 key->tp_dst)) || 545 nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM, 546 !(key->tun_flags & TUNNEL_CSUM)) || 547 tunnel_key_opts_dump(skb, info)) 548 goto nla_put_failure; 549 550 if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos)) 551 goto nla_put_failure; 552 553 if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl)) 554 goto nla_put_failure; 555 } 556 557 tcf_tm_dump(&tm, &t->tcf_tm); 558 if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm), 559 &tm, TCA_TUNNEL_KEY_PAD)) 560 goto nla_put_failure; 561 spin_unlock_bh(&t->tcf_lock); 562 563 return skb->len; 564 565 nla_put_failure: 566 spin_unlock_bh(&t->tcf_lock); 567 nlmsg_trim(skb, b); 568 return -1; 569 } 570 571 static int tunnel_key_walker(struct net *net, struct sk_buff *skb, 572 struct netlink_callback *cb, int type, 573 const struct tc_action_ops *ops, 574 struct netlink_ext_ack *extack) 575 { 576 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 577 578 return tcf_generic_walker(tn, skb, cb, type, ops, extack); 579 } 580 581 static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index) 582 { 583 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 584 585 return tcf_idr_search(tn, a, index); 586 } 587 588 static struct tc_action_ops act_tunnel_key_ops = { 589 .kind = "tunnel_key", 590 .id = TCA_ID_TUNNEL_KEY, 591 .owner = THIS_MODULE, 592 .act = tunnel_key_act, 593 .dump = tunnel_key_dump, 594 .init = tunnel_key_init, 595 .cleanup = tunnel_key_release, 596 .walk = tunnel_key_walker, 597 .lookup = tunnel_key_search, 598 .size = sizeof(struct tcf_tunnel_key), 599 }; 600 601 static __net_init int tunnel_key_init_net(struct net *net) 602 { 603 struct tc_action_net *tn = net_generic(net, tunnel_key_net_id); 604 605 return tc_action_net_init(tn, &act_tunnel_key_ops); 606 } 607 608 static void __net_exit tunnel_key_exit_net(struct list_head *net_list) 609 { 610 tc_action_net_exit(net_list, tunnel_key_net_id); 611 } 612 613 static struct pernet_operations tunnel_key_net_ops = { 614 .init = tunnel_key_init_net, 615 .exit_batch = tunnel_key_exit_net, 616 .id = &tunnel_key_net_id, 617 .size = sizeof(struct tc_action_net), 618 }; 619 620 static int __init tunnel_key_init_module(void) 621 { 622 return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops); 623 } 624 625 static void __exit tunnel_key_cleanup_module(void) 626 { 627 tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops); 628 } 629 630 module_init(tunnel_key_init_module); 631 module_exit(tunnel_key_cleanup_module); 632 633 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>"); 634 MODULE_DESCRIPTION("ip tunnel manipulation actions"); 635 MODULE_LICENSE("GPL v2"); 636