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         int err;
 229
 230         if (!nla) {
 231                 NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
 232                 return -EINVAL;
 233         }
 234
 235         err = nla_parse_nested_deprecated(tb, TCA_TUNNEL_KEY_MAX, nla,
 236                                           tunnel_key_policy, extack);
 237         if (err < 0) {
 238                 NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
 239                 return err;
 240         }
 241
 242         if (!tb[TCA_TUNNEL_KEY_PARMS]) {
 243                 NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
 244                 return -EINVAL;
 245         }
 246
 247         parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
 248         err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
 249         if (err < 0)
 250                 return err;
 251         exists = err;
 252         if (exists && bind)
 253                 return 0;
 254
 255         switch (parm->t_action) {
 256         case TCA_TUNNEL_KEY_ACT_RELEASE:
 257                 break;
 258         case TCA_TUNNEL_KEY_ACT_SET:
 259                 if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
 260                         __be32 key32;
 261
 262                         key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
 263                         key_id = key32_to_tunnel_id(key32);
 264                         flags = TUNNEL_KEY;
 265                 }
 266
 267                 flags |= TUNNEL_CSUM;
 268                 if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
 269                     nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
 270                         flags &= ~TUNNEL_CSUM;
 271
 272                 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
 273                         dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
 274
 275                 if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
 276                         opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
 277                                                            extack);
 278                         if (opts_len < 0) {
 279                                 ret = opts_len;
 280                                 goto err_out;
 281                         }
 282                 }
 283
 284                 tos = 0;
 285                 if (tb[TCA_TUNNEL_KEY_ENC_TOS])
 286                         tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
 287                 ttl = 0;
 288                 if (tb[TCA_TUNNEL_KEY_ENC_TTL])
 289                         ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
 290
 291                 if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
 292                     tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
 293                         __be32 saddr;
 294                         __be32 daddr;
 295
 296                         saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
 297                         daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
 298
 299                         metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
 300                                                     dst_port, flags,
 301                                                     key_id, opts_len);
 302                 } else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
 303                            tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
 304                         struct in6_addr saddr;
 305                         struct in6_addr daddr;
 306
 307                         saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
 308                         daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
 309
 310                         metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
 311                                                       0, flags,
 312                                                       key_id, 0);
 313                 } else {
 314                         NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
 315                         ret = -EINVAL;
 316                         goto err_out;
 317                 }
 318
 319                 if (!metadata) {
 320                         NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
 321                         ret = -ENOMEM;
 322                         goto err_out;
 323                 }
 324
 325 #ifdef CONFIG_DST_CACHE
 326                 ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL);
 327                 if (ret)
 328                         goto release_tun_meta;
 329 #endif
 330
 331                 if (opts_len) {
 332                         ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
 333                                                   &metadata->u.tun_info,
 334                                                   opts_len, extack);
 335                         if (ret < 0)
 336                                 goto release_tun_meta;
 337                 }
 338
 339                 metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
 340                 break;
 341         default:
 342                 NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
 343                 ret = -EINVAL;
 344                 goto err_out;
 345         }
 346
 347         if (!exists) {
 348                 ret = tcf_idr_create(tn, parm->index, est, a,
 349                                      &act_tunnel_key_ops, bind, true);
 350                 if (ret) {
 351                         NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
 352                         goto release_tun_meta;
 353                 }
 354
 355                 ret = ACT_P_CREATED;
 356         } else if (!ovr) {
 357                 NL_SET_ERR_MSG(extack, "TC IDR already exists");
 358                 ret = -EEXIST;
 359                 goto release_tun_meta;
 360         }
 361
 362         err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
 363         if (err < 0) {
 364                 ret = err;
 365                 exists = true;
 366                 goto release_tun_meta;
 367         }
 368         t = to_tunnel_key(*a);
 369
 370         params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
 371         if (unlikely(!params_new)) {
 372                 NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
 373                 ret = -ENOMEM;
 374                 exists = true;
 375                 goto put_chain;
 376         }
 377         params_new->tcft_action = parm->t_action;
 378         params_new->tcft_enc_metadata = metadata;
 379
 380         spin_lock_bh(&t->tcf_lock);
 381         goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
 382         rcu_swap_protected(t->params, params_new,
 383                            lockdep_is_held(&t->tcf_lock));
 384         spin_unlock_bh(&t->tcf_lock);
 385         tunnel_key_release_params(params_new);
 386         if (goto_ch)
 387                 tcf_chain_put_by_act(goto_ch);
 388
 389         if (ret == ACT_P_CREATED)
 390                 tcf_idr_insert(tn, *a);
 391
 392         return ret;
 393
 394 put_chain:
 395         if (goto_ch)
 396                 tcf_chain_put_by_act(goto_ch);
 397
 398 release_tun_meta:
 399         if (metadata)
 400                 dst_release(&metadata->dst);
 401
 402 err_out:
 403         if (exists)
 404                 tcf_idr_release(*a, bind);
 405         else
 406                 tcf_idr_cleanup(tn, parm->index);
 407         return ret;
 408 }
 409
 410 static void tunnel_key_release(struct tc_action *a)
 411 {
 412         struct tcf_tunnel_key *t = to_tunnel_key(a);
 413         struct tcf_tunnel_key_params *params;
 414
 415         params = rcu_dereference_protected(t->params, 1);
 416         tunnel_key_release_params(params);
 417 }
 418
 419 static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
 420                                        const struct ip_tunnel_info *info)
 421 {
 422         int len = info->options_len;
 423         u8 *src = (u8 *)(info + 1);
 424         struct nlattr *start;
 425
 426         start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
 427         if (!start)
 428                 return -EMSGSIZE;
 429
 430         while (len > 0) {
 431                 struct geneve_opt *opt = (struct geneve_opt *)src;
 432
 433                 if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
 434                                  opt->opt_class) ||
 435                     nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
 436                                opt->type) ||
 437                     nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
 438                             opt->length * 4, opt + 1)) {
 439                         nla_nest_cancel(skb, start);
 440                         return -EMSGSIZE;
 441                 }
 442
 443                 len -= sizeof(struct geneve_opt) + opt->length * 4;
 444                 src += sizeof(struct geneve_opt) + opt->length * 4;
 445         }
 446
 447         nla_nest_end(skb, start);
 448         return 0;
 449 }
 450
 451 static int tunnel_key_opts_dump(struct sk_buff *skb,
 452                                 const struct ip_tunnel_info *info)
 453 {
 454         struct nlattr *start;
 455         int err = -EINVAL;
 456
 457         if (!info->options_len)
 458                 return 0;
 459
 460         start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS);
 461         if (!start)
 462                 return -EMSGSIZE;
 463
 464         if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
 465                 err = tunnel_key_geneve_opts_dump(skb, info);
 466                 if (err)
 467                         goto err_out;
 468         } else {
 469 err_out:
 470                 nla_nest_cancel(skb, start);
 471                 return err;
 472         }
 473
 474         nla_nest_end(skb, start);
 475         return 0;
 476 }
 477
 478 static int tunnel_key_dump_addresses(struct sk_buff *skb,
 479                                      const struct ip_tunnel_info *info)
 480 {
 481         unsigned short family = ip_tunnel_info_af(info);
 482
 483         if (family == AF_INET) {
 484                 __be32 saddr = info->key.u.ipv4.src;
 485                 __be32 daddr = info->key.u.ipv4.dst;
 486
 487                 if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
 488                     !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
 489                         return 0;
 490         }
 491
 492         if (family == AF_INET6) {
 493                 const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
 494                 const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
 495
 496                 if (!nla_put_in6_addr(skb,
 497                                       TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
 498                     !nla_put_in6_addr(skb,
 499                                       TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
 500                         return 0;
 501         }
 502
 503         return -EINVAL;
 504 }
 505
 506 static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
 507                            int bind, int ref)
 508 {
 509         unsigned char *b = skb_tail_pointer(skb);
 510         struct tcf_tunnel_key *t = to_tunnel_key(a);
 511         struct tcf_tunnel_key_params *params;
 512         struct tc_tunnel_key opt = {
 513                 .index    = t->tcf_index,
 514                 .refcnt   = refcount_read(&t->tcf_refcnt) - ref,
 515                 .bindcnt  = atomic_read(&t->tcf_bindcnt) - bind,
 516         };
 517         struct tcf_t tm;
 518
 519         spin_lock_bh(&t->tcf_lock);
 520         params = rcu_dereference_protected(t->params,
 521                                            lockdep_is_held(&t->tcf_lock));
 522         opt.action   = t->tcf_action;
 523         opt.t_action = params->tcft_action;
 524
 525         if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
 526                 goto nla_put_failure;
 527
 528         if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
 529                 struct ip_tunnel_info *info =
 530                         &params->tcft_enc_metadata->u.tun_info;
 531                 struct ip_tunnel_key *key = &info->key;
 532                 __be32 key_id = tunnel_id_to_key32(key->tun_id);
 533
 534                 if (((key->tun_flags & TUNNEL_KEY) &&
 535                      nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) ||
 536                     tunnel_key_dump_addresses(skb,
 537                                               &params->tcft_enc_metadata->u.tun_info) ||
 538                     (key->tp_dst &&
 539                       nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
 540                                    key->tp_dst)) ||
 541                     nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
 542                                !(key->tun_flags & TUNNEL_CSUM)) ||
 543                     tunnel_key_opts_dump(skb, info))
 544                         goto nla_put_failure;
 545
 546                 if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
 547                         goto nla_put_failure;
 548
 549                 if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
 550                         goto nla_put_failure;
 551         }
 552
 553         tcf_tm_dump(&tm, &t->tcf_tm);
 554         if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
 555                           &tm, TCA_TUNNEL_KEY_PAD))
 556                 goto nla_put_failure;
 557         spin_unlock_bh(&t->tcf_lock);
 558
 559         return skb->len;
 560
 561 nla_put_failure:
 562         spin_unlock_bh(&t->tcf_lock);
 563         nlmsg_trim(skb, b);
 564         return -1;
 565 }
 566
 567 static int tunnel_key_walker(struct net *net, struct sk_buff *skb,
 568                              struct netlink_callback *cb, int type,
 569                              const struct tc_action_ops *ops,
 570                              struct netlink_ext_ack *extack)
 571 {
 572         struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 573
 574         return tcf_generic_walker(tn, skb, cb, type, ops, extack);
 575 }
 576
 577 static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index)
 578 {
 579         struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 580
 581         return tcf_idr_search(tn, a, index);
 582 }
 583
 584 static struct tc_action_ops act_tunnel_key_ops = {
 585         .kind           =       "tunnel_key",
 586         .id             =       TCA_ID_TUNNEL_KEY,
 587         .owner          =       THIS_MODULE,
 588         .act            =       tunnel_key_act,
 589         .dump           =       tunnel_key_dump,
 590         .init           =       tunnel_key_init,
 591         .cleanup        =       tunnel_key_release,
 592         .walk           =       tunnel_key_walker,
 593         .lookup         =       tunnel_key_search,
 594         .size           =       sizeof(struct tcf_tunnel_key),
 595 };
 596
 597 static __net_init int tunnel_key_init_net(struct net *net)
 598 {
 599         struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
 600
 601         return tc_action_net_init(tn, &act_tunnel_key_ops);
 602 }
 603
 604 static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
 605 {
 606         tc_action_net_exit(net_list, tunnel_key_net_id);
 607 }
 608
 609 static struct pernet_operations tunnel_key_net_ops = {
 610         .init = tunnel_key_init_net,
 611         .exit_batch = tunnel_key_exit_net,
 612         .id   = &tunnel_key_net_id,
 613         .size = sizeof(struct tc_action_net),
 614 };
 615
 616 static int __init tunnel_key_init_module(void)
 617 {
 618         return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
 619 }
 620
 621 static void __exit tunnel_key_cleanup_module(void)
 622 {
 623         tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
 624 }
 625
 626 module_init(tunnel_key_init_module);
 627 module_exit(tunnel_key_cleanup_module);
 628
 629 MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
 630 MODULE_DESCRIPTION("ip tunnel manipulation actions");
 631 MODULE_LICENSE("GPL v2");