net/sched/act_tunnel_key.c

   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(&params->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(&params->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                         &params->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                                               &params->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 struct tc_action_ops act_tunnel_key_ops = {
 552         .kind           =       "tunnel_key",
 553         .type           =       TCA_ACT_TUNNEL_KEY,
 554         .owner          =       THIS_MODULE,
 555         .act            =       tunnel_key_act,
 556         .dump           =       tunnel_key_dump,
 557         .init           =       tunnel_key_init,
 558         .cleanup        =       tunnel_key_release,
 559         .walk           =       tunnel_key_walker,
 560         .lookup         =       tunnel_key_search,
 561         .size           =       sizeof(struct tcf_tunnel_key),
 562 };
 563
 564 static __net_init int tunnel_key_init_net(struct net *net)
 565 {
 566         struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 567
 568         return tc_action_net_init(tn, &act_tunnel_key_ops);
 569 }
 570
 571 static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
 572 {
 573         tc_action_net_exit(net_list, tunnel_key_net_id);
 574 }
 575
 576 static struct pernet_operations tunnel_key_net_ops = {
 577         .init = tunnel_key_init_net,
 578         .exit_batch = tunnel_key_exit_net,
 579         .id   = &tunnel_key_net_id,
 580         .size = sizeof(struct tc_action_net),
 581 };
 582
 583 static int __init tunnel_key_init_module(void)
 584 {
 585         return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
 586 }
 587
 588 static void __exit tunnel_key_cleanup_module(void)
 589 {
 590         tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
 591 }
 592
 593 module_init(tunnel_key_init_module);
 594 module_exit(tunnel_key_cleanup_module);
 595
 596 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
 597 MODULE_DESCRIPTION("ip tunnel manipulation actions");
 598 MODULE_LICENSE("GPL v2");