net/sched/act_tunnel_key.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2016, Amir Vadai <amir@vadai.me>
   4  * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/init.h>
   9 #include <linux/kernel.h>
  10 #include <linux/skbuff.h>
  11 #include <linux/rtnetlink.h>
  12 #include <net/geneve.h>
  13 #include <net/netlink.h>
  14 #include <net/pkt_sched.h>
  15 #include <net/dst.h>
  16 #include <net/pkt_cls.h>
  17
  18 #include <linux/tc_act/tc_tunnel_key.h>
  19 #include <net/tc_act/tc_tunnel_key.h>
  20
  21 static unsigned int tunnel_key_net_id;
  22 static struct tc_action_ops act_tunnel_key_ops;
  23
  24 static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a,
  25                           struct tcf_result *res)
  26 {
  27         struct tcf_tunnel_key *t = to_tunnel_key(a);
  28         struct tcf_tunnel_key_params *params;
  29         int action;
  30
  31         params = rcu_dereference_bh(t->params);
  32
  33         tcf_lastuse_update(&t->tcf_tm);
  34         bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
  35         action = READ_ONCE(t->tcf_action);
  36
  37         switch (params->tcft_action) {
  38         case TCA_TUNNEL_KEY_ACT_RELEASE:
  39                 skb_dst_drop(skb);
  40                 break;
  41         case TCA_TUNNEL_KEY_ACT_SET:
  42                 skb_dst_drop(skb);
  43                 skb_dst_set(skb, dst_clone(&params->tcft_enc_metadata->dst));
  44                 break;
  45         default:
  46                 WARN_ONCE(1, "Bad tunnel_key action %d.\n",
  47                           params->tcft_action);
  48                 break;
  49         }
  50
  51         return action;
  52 }
  53
  54 static const struct nla_policy
  55 enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
  56         [TCA_TUNNEL_KEY_ENC_OPTS_GENEVE]        = { .type = NLA_NESTED },
  57 };
  58
  59 static const struct nla_policy
  60 geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
  61         [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]      = { .type = NLA_U16 },
  62         [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]       = { .type = NLA_U8 },
  63         [TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]       = { .type = NLA_BINARY,
  64                                                        .len = 128 },
  65 };
  66
  67 static int
  68 tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len,
  69                            struct netlink_ext_ack *extack)
  70 {
  71         struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
  72         int err, data_len, opt_len;
  73         u8 *data;
  74
  75         err = nla_parse_nested_deprecated(tb,
  76                                           TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
  77                                           nla, geneve_opt_policy, extack);
  78         if (err < 0)
  79                 return err;
  80
  81         if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] ||
  82             !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] ||
  83             !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
  84                 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
  85                 return -EINVAL;
  86         }
  87
  88         data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
  89         data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
  90         if (data_len < 4) {
  91                 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
  92                 return -ERANGE;
  93         }
  94         if (data_len % 4) {
  95                 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
  96                 return -ERANGE;
  97         }
  98
  99         opt_len = sizeof(struct geneve_opt) + data_len;
 100         if (dst) {
 101                 struct geneve_opt *opt = dst;
 102
 103                 WARN_ON(dst_len < opt_len);
 104
 105                 opt->opt_class =
 106                         nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
 107                 opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
 108                 opt->length = data_len / 4; /* length is in units of 4 bytes */
 109                 opt->r1 = 0;
 110                 opt->r2 = 0;
 111                 opt->r3 = 0;
 112
 113                 memcpy(opt + 1, data, data_len);
 114         }
 115
 116         return opt_len;
 117 }
 118
 119 static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
 120                                 int dst_len, struct netlink_ext_ack *extack)
 121 {
 122         int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
 123         const struct nlattr *attr, *head = nla_data(nla);
 124
 125         err = nla_validate_deprecated(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
 126                                       enc_opts_policy, extack);
 127         if (err)
 128                 return err;
 129
 130         nla_for_each_attr(attr, head, len, rem) {
 131                 switch (nla_type(attr)) {
 132                 case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
 133                         opt_len = tunnel_key_copy_geneve_opt(attr, dst,
 134                                                              dst_len, extack);
 135                         if (opt_len < 0)
 136                                 return opt_len;
 137                         opts_len += opt_len;
 138                         if (dst) {
 139                                 dst_len -= opt_len;
 140                                 dst += opt_len;
 141                         }
 142                         break;
 143                 }
 144         }
 145
 146         if (!opts_len) {
 147                 NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
 148                 return -EINVAL;
 149         }
 150
 151         if (rem > 0) {
 152                 NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
 153                 return -EINVAL;
 154         }
 155
 156         return opts_len;
 157 }
 158
 159 static int tunnel_key_get_opts_len(struct nlattr *nla,
 160                                    struct netlink_ext_ack *extack)
 161 {
 162         return tunnel_key_copy_opts(nla, NULL, 0, extack);
 163 }
 164
 165 static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info,
 166                                int opts_len, struct netlink_ext_ack *extack)
 167 {
 168         info->options_len = opts_len;
 169         switch (nla_type(nla_data(nla))) {
 170         case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
 171 #if IS_ENABLED(CONFIG_INET)
 172                 info->key.tun_flags |= TUNNEL_GENEVE_OPT;
 173                 return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
 174                                             opts_len, extack);
 175 #else
 176                 return -EAFNOSUPPORT;
 177 #endif
 178         default:
 179                 NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
 180                 return -EINVAL;
 181         }
 182 }
 183
 184 static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
 185         [TCA_TUNNEL_KEY_PARMS]      = { .len = sizeof(struct tc_tunnel_key) },
 186         [TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
 187         [TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
 188         [TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
 189         [TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
 190         [TCA_TUNNEL_KEY_ENC_KEY_ID]   = { .type = NLA_U32 },
 191         [TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
 192         [TCA_TUNNEL_KEY_NO_CSUM]      = { .type = NLA_U8 },
 193         [TCA_TUNNEL_KEY_ENC_OPTS]     = { .type = NLA_NESTED },
 194         [TCA_TUNNEL_KEY_ENC_TOS]      = { .type = NLA_U8 },
 195         [TCA_TUNNEL_KEY_ENC_TTL]      = { .type = NLA_U8 },
 196 };
 197
 198 static void tunnel_key_release_params(struct tcf_tunnel_key_params *p)
 199 {
 200         if (!p)
 201                 return;
 202         if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
 203                 dst_release(&p->tcft_enc_metadata->dst);
 204
 205         kfree_rcu(p, rcu);
 206 }
 207
 208 static int tunnel_key_init(struct net *net, struct nlattr *nla,
 209                            struct nlattr *est, struct tc_action **a,
 210                            int ovr, int bind, bool rtnl_held,
 211                            struct tcf_proto *tp,
 212                            struct netlink_ext_ack *extack)
 213 {
 214         struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 215         struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
 216         struct tcf_tunnel_key_params *params_new;
 217         struct metadata_dst *metadata = NULL;
 218         struct tcf_chain *goto_ch = 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         u32 index;
 229         int err;
 230
 231         if (!nla) {
 232                 NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
 233                 return -EINVAL;
 234         }
 235
 236         err = nla_parse_nested_deprecated(tb, TCA_TUNNEL_KEY_MAX, nla,
 237                                           tunnel_key_policy, extack);
 238         if (err < 0) {
 239                 NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
 240                 return err;
 241         }
 242
 243         if (!tb[TCA_TUNNEL_KEY_PARMS]) {
 244                 NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
 245                 return -EINVAL;
 246         }
 247
 248         parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
 249         index = parm->index;
 250         err = tcf_idr_check_alloc(tn, &index, a, bind);
 251         if (err < 0)
 252                 return err;
 253         exists = err;
 254         if (exists && bind)
 255                 return 0;
 256
 257         switch (parm->t_action) {
 258         case TCA_TUNNEL_KEY_ACT_RELEASE:
 259                 break;
 260         case TCA_TUNNEL_KEY_ACT_SET:
 261                 if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
 262                         __be32 key32;
 263
 264                         key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
 265                         key_id = key32_to_tunnel_id(key32);
 266                         flags = TUNNEL_KEY;
 267                 }
 268
 269                 flags |= TUNNEL_CSUM;
 270                 if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
 271                     nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
 272                         flags &= ~TUNNEL_CSUM;
 273
 274                 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
 275                         dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
 276
 277                 if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
 278                         opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
 279                                                            extack);
 280                         if (opts_len < 0) {
 281                                 ret = opts_len;
 282                                 goto err_out;
 283                         }
 284                 }
 285
 286                 tos = 0;
 287                 if (tb[TCA_TUNNEL_KEY_ENC_TOS])
 288                         tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
 289                 ttl = 0;
 290                 if (tb[TCA_TUNNEL_KEY_ENC_TTL])
 291                         ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
 292
 293                 if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
 294                     tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
 295                         __be32 saddr;
 296                         __be32 daddr;
 297
 298                         saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
 299                         daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
 300
 301                         metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
 302                                                     dst_port, flags,
 303                                                     key_id, opts_len);
 304                 } else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
 305                            tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
 306                         struct in6_addr saddr;
 307                         struct in6_addr daddr;
 308
 309                         saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
 310                         daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
 311
 312                         metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
 313                                                       0, flags,
 314                                                       key_id, 0);
 315                 } else {
 316                         NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
 317                         ret = -EINVAL;
 318                         goto err_out;
 319                 }
 320
 321                 if (!metadata) {
 322                         NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
 323                         ret = -ENOMEM;
 324                         goto err_out;
 325                 }
 326
 327 #ifdef CONFIG_DST_CACHE
 328                 ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL);
 329                 if (ret)
 330                         goto release_tun_meta;
 331 #endif
 332
 333                 if (opts_len) {
 334                         ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
 335                                                   &metadata->u.tun_info,
 336                                                   opts_len, extack);
 337                         if (ret < 0)
 338                                 goto release_tun_meta;
 339                 }
 340
 341                 metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
 342                 break;
 343         default:
 344                 NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
 345                 ret = -EINVAL;
 346                 goto err_out;
 347         }
 348
 349         if (!exists) {
 350                 ret = tcf_idr_create(tn, index, est, a,
 351                                      &act_tunnel_key_ops, bind, true);
 352                 if (ret) {
 353                         NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
 354                         goto release_tun_meta;
 355                 }
 356
 357                 ret = ACT_P_CREATED;
 358         } else if (!ovr) {
 359                 NL_SET_ERR_MSG(extack, "TC IDR already exists");
 360                 ret = -EEXIST;
 361                 goto release_tun_meta;
 362         }
 363
 364         err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
 365         if (err < 0) {
 366                 ret = err;
 367                 exists = true;
 368                 goto release_tun_meta;
 369         }
 370         t = to_tunnel_key(*a);
 371
 372         params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
 373         if (unlikely(!params_new)) {
 374                 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
 375                 ret = -ENOMEM;
 376                 exists = true;
 377                 goto put_chain;
 378         }
 379         params_new->tcft_action = parm->t_action;
 380         params_new->tcft_enc_metadata = metadata;
 381
 382         spin_lock_bh(&t->tcf_lock);
 383         goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
 384         rcu_swap_protected(t->params, params_new,
 385                            lockdep_is_held(&t->tcf_lock));
 386         spin_unlock_bh(&t->tcf_lock);
 387         tunnel_key_release_params(params_new);
 388         if (goto_ch)
 389                 tcf_chain_put_by_act(goto_ch);
 390
 391         if (ret == ACT_P_CREATED)
 392                 tcf_idr_insert(tn, *a);
 393
 394         return ret;
 395
 396 put_chain:
 397         if (goto_ch)
 398                 tcf_chain_put_by_act(goto_ch);
 399
 400 release_tun_meta:
 401         if (metadata)
 402                 dst_release(&metadata->dst);
 403
 404 err_out:
 405         if (exists)
 406                 tcf_idr_release(*a, bind);
 407         else
 408                 tcf_idr_cleanup(tn, index);
 409         return ret;
 410 }
 411
 412 static void tunnel_key_release(struct tc_action *a)
 413 {
 414         struct tcf_tunnel_key *t = to_tunnel_key(a);
 415         struct tcf_tunnel_key_params *params;
 416
 417         params = rcu_dereference_protected(t->params, 1);
 418         tunnel_key_release_params(params);
 419 }
 420
 421 static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
 422                                        const struct ip_tunnel_info *info)
 423 {
 424         int len = info->options_len;
 425         u8 *src = (u8 *)(info + 1);
 426         struct nlattr *start;
 427
 428         start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
 429         if (!start)
 430                 return -EMSGSIZE;
 431
 432         while (len > 0) {
 433                 struct geneve_opt *opt = (struct geneve_opt *)src;
 434
 435                 if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
 436                                  opt->opt_class) ||
 437                     nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
 438                                opt->type) ||
 439                     nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
 440                             opt->length * 4, opt + 1)) {
 441                         nla_nest_cancel(skb, start);
 442                         return -EMSGSIZE;
 443                 }
 444
 445                 len -= sizeof(struct geneve_opt) + opt->length * 4;
 446                 src += sizeof(struct geneve_opt) + opt->length * 4;
 447         }
 448
 449         nla_nest_end(skb, start);
 450         return 0;
 451 }
 452
 453 static int tunnel_key_opts_dump(struct sk_buff *skb,
 454                                 const struct ip_tunnel_info *info)
 455 {
 456         struct nlattr *start;
 457         int err = -EINVAL;
 458
 459         if (!info->options_len)
 460                 return 0;
 461
 462         start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS);
 463         if (!start)
 464                 return -EMSGSIZE;
 465
 466         if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
 467                 err = tunnel_key_geneve_opts_dump(skb, info);
 468                 if (err)
 469                         goto err_out;
 470         } else {
 471 err_out:
 472                 nla_nest_cancel(skb, start);
 473                 return err;
 474         }
 475
 476         nla_nest_end(skb, start);
 477         return 0;
 478 }
 479
 480 static int tunnel_key_dump_addresses(struct sk_buff *skb,
 481                                      const struct ip_tunnel_info *info)
 482 {
 483         unsigned short family = ip_tunnel_info_af(info);
 484
 485         if (family == AF_INET) {
 486                 __be32 saddr = info->key.u.ipv4.src;
 487                 __be32 daddr = info->key.u.ipv4.dst;
 488
 489                 if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
 490                     !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
 491                         return 0;
 492         }
 493
 494         if (family == AF_INET6) {
 495                 const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
 496                 const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
 497
 498                 if (!nla_put_in6_addr(skb,
 499                                       TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
 500                     !nla_put_in6_addr(skb,
 501                                       TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
 502                         return 0;
 503         }
 504
 505         return -EINVAL;
 506 }
 507
 508 static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
 509                            int bind, int ref)
 510 {
 511         unsigned char *b = skb_tail_pointer(skb);
 512         struct tcf_tunnel_key *t = to_tunnel_key(a);
 513         struct tcf_tunnel_key_params *params;
 514         struct tc_tunnel_key opt = {
 515                 .index    = t->tcf_index,
 516                 .refcnt   = refcount_read(&t->tcf_refcnt) - ref,
 517                 .bindcnt  = atomic_read(&t->tcf_bindcnt) - bind,
 518         };
 519         struct tcf_t tm;
 520
 521         spin_lock_bh(&t->tcf_lock);
 522         params = rcu_dereference_protected(t->params,
 523                                            lockdep_is_held(&t->tcf_lock));
 524         opt.action   = t->tcf_action;
 525         opt.t_action = params->tcft_action;
 526
 527         if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
 528                 goto nla_put_failure;
 529
 530         if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
 531                 struct ip_tunnel_info *info =
 532                         &params->tcft_enc_metadata->u.tun_info;
 533                 struct ip_tunnel_key *key = &info->key;
 534                 __be32 key_id = tunnel_id_to_key32(key->tun_id);
 535
 536                 if (((key->tun_flags & TUNNEL_KEY) &&
 537                      nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) ||
 538                     tunnel_key_dump_addresses(skb,
 539                                               &params->tcft_enc_metadata->u.tun_info) ||
 540                     (key->tp_dst &&
 541                       nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
 542                                    key->tp_dst)) ||
 543                     nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
 544                                !(key->tun_flags & TUNNEL_CSUM)) ||
 545                     tunnel_key_opts_dump(skb, info))
 546                         goto nla_put_failure;
 547
 548                 if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
 549                         goto nla_put_failure;
 550
 551                 if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
 552                         goto nla_put_failure;
 553         }
 554
 555         tcf_tm_dump(&tm, &t->tcf_tm);
 556         if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
 557                           &tm, TCA_TUNNEL_KEY_PAD))
 558                 goto nla_put_failure;
 559         spin_unlock_bh(&t->tcf_lock);
 560
 561         return skb->len;
 562
 563 nla_put_failure:
 564         spin_unlock_bh(&t->tcf_lock);
 565         nlmsg_trim(skb, b);
 566         return -1;
 567 }
 568
 569 static int tunnel_key_walker(struct net *net, struct sk_buff *skb,
 570                              struct netlink_callback *cb, int type,
 571                              const struct tc_action_ops *ops,
 572                              struct netlink_ext_ack *extack)
 573 {
 574         struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 575
 576         return tcf_generic_walker(tn, skb, cb, type, ops, extack);
 577 }
 578
 579 static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index)
 580 {
 581         struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 582
 583         return tcf_idr_search(tn, a, index);
 584 }
 585
 586 static struct tc_action_ops act_tunnel_key_ops = {
 587         .kind           =       "tunnel_key",
 588         .id             =       TCA_ID_TUNNEL_KEY,
 589         .owner          =       THIS_MODULE,
 590         .act            =       tunnel_key_act,
 591         .dump           =       tunnel_key_dump,
 592         .init           =       tunnel_key_init,
 593         .cleanup        =       tunnel_key_release,
 594         .walk           =       tunnel_key_walker,
 595         .lookup         =       tunnel_key_search,
 596         .size           =       sizeof(struct tcf_tunnel_key),
 597 };
 598
 599 static __net_init int tunnel_key_init_net(struct net *net)
 600 {
 601         struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 602
 603         return tc_action_net_init(net, tn, &act_tunnel_key_ops);
 604 }
 605
 606 static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
 607 {
 608         tc_action_net_exit(net_list, tunnel_key_net_id);
 609 }
 610
 611 static struct pernet_operations tunnel_key_net_ops = {
 612         .init = tunnel_key_init_net,
 613         .exit_batch = tunnel_key_exit_net,
 614         .id   = &tunnel_key_net_id,
 615         .size = sizeof(struct tc_action_net),
 616 };
 617
 618 static int __init tunnel_key_init_module(void)
 619 {
 620         return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
 621 }
 622
 623 static void __exit tunnel_key_cleanup_module(void)
 624 {
 625         tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
 626 }
 627
 628 module_init(tunnel_key_init_module);
 629 module_exit(tunnel_key_cleanup_module);
 630
 631 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
 632 MODULE_DESCRIPTION("ip tunnel manipulation actions");
 633 MODULE_LICENSE("GPL v2");