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 #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(&params->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                         &params->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                                               &params->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");