datapath/flow_netlink.c

   1 /*
   2  * Copyright (c) 2007-2013 Nicira, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of version 2 of the GNU General Public
   6  * License as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16  * 02110-1301, USA
  17  */
  18
  19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include "flow.h"
  22 #include "datapath.h"
  23 #include <linux/uaccess.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/if_ether.h>
  27 #include <linux/if_vlan.h>
  28 #include <net/llc_pdu.h>
  29 #include <linux/kernel.h>
  30 #include <linux/jhash.h>
  31 #include <linux/jiffies.h>
  32 #include <linux/llc.h>
  33 #include <linux/module.h>
  34 #include <linux/in.h>
  35 #include <linux/rcupdate.h>
  36 #include <linux/if_arp.h>
  37 #include <linux/ip.h>
  38 #include <linux/ipv6.h>
  39 #include <linux/sctp.h>
  40 #include <linux/tcp.h>
  41 #include <linux/udp.h>
  42 #include <linux/icmp.h>
  43 #include <linux/icmpv6.h>
  44 #include <linux/rculist.h>
  45 #include <net/ip.h>
  46 #include <net/ipv6.h>
  47 #include <net/ndisc.h>
  48
  49 #include "flow_netlink.h"
  50
  51 static void update_range__(struct sw_flow_match *match,
  52                            size_t offset, size_t size, bool is_mask)
  53 {
  54         struct sw_flow_key_range *range = NULL;
  55         size_t start = rounddown(offset, sizeof(long));
  56         size_t end = roundup(offset + size, sizeof(long));
  57
  58         if (!is_mask)
  59                 range = &match->range;
  60         else if (match->mask)
  61                 range = &match->mask->range;
  62
  63         if (!range)
  64                 return;
  65
  66         if (range->start == range->end) {
  67                 range->start = start;
  68                 range->end = end;
  69                 return;
  70         }
  71
  72         if (range->start > start)
  73                 range->start = start;
  74
  75         if (range->end < end)
  76                 range->end = end;
  77 }
  78
  79 #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
  80         do { \
  81                 update_range__(match, offsetof(struct sw_flow_key, field),  \
  82                                      sizeof((match)->key->field), is_mask); \
  83                 if (is_mask) {                                              \
  84                         if ((match)->mask)                                  \
  85                                 (match)->mask->key.field = value;           \
  86                 } else {                                                    \
  87                         (match)->key->field = value;                        \
  88                 }                                                           \
  89         } while (0)
  90
  91 #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \
  92         do { \
  93                 update_range__(match, offsetof(struct sw_flow_key, field),  \
  94                                 len, is_mask);                              \
  95                 if (is_mask) {                                              \
  96                         if ((match)->mask)                                  \
  97                                 memcpy(&(match)->mask->key.field, value_p, len);\
  98                 } else {                                                    \
  99                         memcpy(&(match)->key->field, value_p, len);         \
 100                 }                                                           \
 101         } while (0)
 102
 103 static u16 range_n_bytes(const struct sw_flow_key_range *range)
 104 {
 105         return range->end - range->start;
 106 }
 107
 108 static bool match_validate(const struct sw_flow_match *match,
 109                            u64 key_attrs, u64 mask_attrs)
 110 {
 111         u64 key_expected = 1ULL << OVS_KEY_ATTR_ETHERNET;
 112         u64 mask_allowed = key_attrs;  /* At most allow all key attributes */
 113
 114         /* The following mask attributes allowed only if they
 115          * pass the validation tests. */
 116         mask_allowed &= ~((1ULL << OVS_KEY_ATTR_IPV4)
 117                         | (1ULL << OVS_KEY_ATTR_IPV6)
 118                         | (1ULL << OVS_KEY_ATTR_TCP)
 119                         | (1ULL << OVS_KEY_ATTR_TCP_FLAGS)
 120                         | (1ULL << OVS_KEY_ATTR_UDP)
 121                         | (1ULL << OVS_KEY_ATTR_SCTP)
 122                         | (1ULL << OVS_KEY_ATTR_ICMP)
 123                         | (1ULL << OVS_KEY_ATTR_ICMPV6)
 124                         | (1ULL << OVS_KEY_ATTR_ARP)
 125                         | (1ULL << OVS_KEY_ATTR_ND));
 126
 127         /* Always allowed mask fields. */
 128         mask_allowed |= ((1ULL << OVS_KEY_ATTR_TUNNEL)
 129                        | (1ULL << OVS_KEY_ATTR_IN_PORT)
 130                        | (1ULL << OVS_KEY_ATTR_ETHERTYPE));
 131
 132         /* Check key attributes. */
 133         if (match->key->eth.type == htons(ETH_P_ARP)
 134                         || match->key->eth.type == htons(ETH_P_RARP)) {
 135                 key_expected |= 1ULL << OVS_KEY_ATTR_ARP;
 136                 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
 137                         mask_allowed |= 1ULL << OVS_KEY_ATTR_ARP;
 138         }
 139
 140         if (match->key->eth.type == htons(ETH_P_IP)) {
 141                 key_expected |= 1ULL << OVS_KEY_ATTR_IPV4;
 142                 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
 143                         mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV4;
 144
 145                 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
 146                         if (match->key->ip.proto == IPPROTO_UDP) {
 147                                 key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
 148                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 149                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
 150                         }
 151
 152                         if (match->key->ip.proto == IPPROTO_SCTP) {
 153                                 key_expected |= 1ULL << OVS_KEY_ATTR_SCTP;
 154                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 155                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP;
 156                         }
 157
 158                         if (match->key->ip.proto == IPPROTO_TCP) {
 159                                 key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
 160                                 key_expected |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
 161                                 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
 162                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
 163                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
 164                                 }
 165                         }
 166
 167                         if (match->key->ip.proto == IPPROTO_ICMP) {
 168                                 key_expected |= 1ULL << OVS_KEY_ATTR_ICMP;
 169                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 170                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMP;
 171                         }
 172                 }
 173         }
 174
 175         if (match->key->eth.type == htons(ETH_P_IPV6)) {
 176                 key_expected |= 1ULL << OVS_KEY_ATTR_IPV6;
 177                 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
 178                         mask_allowed |= 1ULL << OVS_KEY_ATTR_IPV6;
 179
 180                 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
 181                         if (match->key->ip.proto == IPPROTO_UDP) {
 182                                 key_expected |= 1ULL << OVS_KEY_ATTR_UDP;
 183                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 184                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_UDP;
 185                         }
 186
 187                         if (match->key->ip.proto == IPPROTO_SCTP) {
 188                                 key_expected |= 1ULL << OVS_KEY_ATTR_SCTP;
 189                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 190                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_SCTP;
 191                         }
 192
 193                         if (match->key->ip.proto == IPPROTO_TCP) {
 194                                 key_expected |= 1ULL << OVS_KEY_ATTR_TCP;
 195                                 key_expected |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
 196                                 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
 197                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP;
 198                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_TCP_FLAGS;
 199                                 }
 200                         }
 201
 202                         if (match->key->ip.proto == IPPROTO_ICMPV6) {
 203                                 key_expected |= 1ULL << OVS_KEY_ATTR_ICMPV6;
 204                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 205                                         mask_allowed |= 1ULL << OVS_KEY_ATTR_ICMPV6;
 206
 207                                 if (match->key->ipv6.tp.src ==
 208                                                 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
 209                                     match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
 210                                         key_expected |= 1ULL << OVS_KEY_ATTR_ND;
 211                                         if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff)))
 212                                                 mask_allowed |= 1ULL << OVS_KEY_ATTR_ND;
 213                                 }
 214                         }
 215                 }
 216         }
 217
 218         if ((key_attrs & key_expected) != key_expected) {
 219                 /* Key attributes check failed. */
 220                 OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n",
 221                                 (unsigned long long)key_attrs, (unsigned long long)key_expected);
 222                 return false;
 223         }
 224
 225         if ((mask_attrs & mask_allowed) != mask_attrs) {
 226                 /* Mask attributes check failed. */
 227                 OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n",
 228                                 (unsigned long long)mask_attrs, (unsigned long long)mask_allowed);
 229                 return false;
 230         }
 231
 232         return true;
 233 }
 234
 235 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute.  */
 236 static const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
 237         [OVS_KEY_ATTR_ENCAP] = -1,
 238         [OVS_KEY_ATTR_PRIORITY] = sizeof(u32),
 239         [OVS_KEY_ATTR_IN_PORT] = sizeof(u32),
 240         [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32),
 241         [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet),
 242         [OVS_KEY_ATTR_VLAN] = sizeof(__be16),
 243         [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16),
 244         [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4),
 245         [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6),
 246         [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp),
 247         [OVS_KEY_ATTR_TCP_FLAGS] = sizeof(__be16),
 248         [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp),
 249         [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp),
 250         [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp),
 251         [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6),
 252         [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp),
 253         [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd),
 254         [OVS_KEY_ATTR_TUNNEL] = -1,
 255 };
 256
 257 static bool is_all_zero(const u8 *fp, size_t size)
 258 {
 259         int i;
 260
 261         if (!fp)
 262                 return false;
 263
 264         for (i = 0; i < size; i++)
 265                 if (fp[i])
 266                         return false;
 267
 268         return true;
 269 }
 270
 271 static int __parse_flow_nlattrs(const struct nlattr *attr,
 272                                 const struct nlattr *a[],
 273                                 u64 *attrsp, bool nz)
 274 {
 275         const struct nlattr *nla;
 276         u64 attrs;
 277         int rem;
 278
 279         attrs = *attrsp;
 280         nla_for_each_nested(nla, attr, rem) {
 281                 u16 type = nla_type(nla);
 282                 int expected_len;
 283
 284                 if (type > OVS_KEY_ATTR_MAX) {
 285                         OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n",
 286                                   type, OVS_KEY_ATTR_MAX);
 287                         return -EINVAL;
 288                 }
 289
 290                 if (attrs & (1ULL << type)) {
 291                         OVS_NLERR("Duplicate key attribute (type %d).\n", type);
 292                         return -EINVAL;
 293                 }
 294
 295                 expected_len = ovs_key_lens[type];
 296                 if (nla_len(nla) != expected_len && expected_len != -1) {
 297                         OVS_NLERR("Key attribute has unexpected length (type=%d"
 298                                   ", length=%d, expected=%d).\n", type,
 299                                   nla_len(nla), expected_len);
 300                         return -EINVAL;
 301                 }
 302
 303                 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
 304                         attrs |= 1ULL << type;
 305                         a[type] = nla;
 306                 }
 307         }
 308         if (rem) {
 309                 OVS_NLERR("Message has %d unknown bytes.\n", rem);
 310                 return -EINVAL;
 311         }
 312
 313         *attrsp = attrs;
 314         return 0;
 315 }
 316
 317 static int parse_flow_mask_nlattrs(const struct nlattr *attr,
 318                                    const struct nlattr *a[], u64 *attrsp)
 319 {
 320         return __parse_flow_nlattrs(attr, a, attrsp, true);
 321 }
 322
 323 static int parse_flow_nlattrs(const struct nlattr *attr,
 324                               const struct nlattr *a[], u64 *attrsp)
 325 {
 326         return __parse_flow_nlattrs(attr, a, attrsp, false);
 327 }
 328
 329 static int ipv4_tun_from_nlattr(const struct nlattr *attr,
 330                                 struct sw_flow_match *match, bool is_mask)
 331 {
 332         struct nlattr *a;
 333         int rem;
 334         bool ttl = false;
 335         __be16 tun_flags = 0;
 336
 337         nla_for_each_nested(a, attr, rem) {
 338                 int type = nla_type(a);
 339                 static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
 340                         [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64),
 341                         [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32),
 342                         [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32),
 343                         [OVS_TUNNEL_KEY_ATTR_TOS] = 1,
 344                         [OVS_TUNNEL_KEY_ATTR_TTL] = 1,
 345                         [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0,
 346                         [OVS_TUNNEL_KEY_ATTR_CSUM] = 0,
 347                 };
 348
 349                 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
 350                         OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n",
 351                         type, OVS_TUNNEL_KEY_ATTR_MAX);
 352                         return -EINVAL;
 353                 }
 354
 355                 if (ovs_tunnel_key_lens[type] != nla_len(a)) {
 356                         OVS_NLERR("IPv4 tunnel attribute type has unexpected "
 357                                   " length (type=%d, length=%d, expected=%d).\n",
 358                                   type, nla_len(a), ovs_tunnel_key_lens[type]);
 359                         return -EINVAL;
 360                 }
 361
 362                 switch (type) {
 363                 case OVS_TUNNEL_KEY_ATTR_ID:
 364                         SW_FLOW_KEY_PUT(match, tun_key.tun_id,
 365                                         nla_get_be64(a), is_mask);
 366                         tun_flags |= TUNNEL_KEY;
 367                         break;
 368                 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
 369                         SW_FLOW_KEY_PUT(match, tun_key.ipv4_src,
 370                                         nla_get_be32(a), is_mask);
 371                         break;
 372                 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
 373                         SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst,
 374                                         nla_get_be32(a), is_mask);
 375                         break;
 376                 case OVS_TUNNEL_KEY_ATTR_TOS:
 377                         SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos,
 378                                         nla_get_u8(a), is_mask);
 379                         break;
 380                 case OVS_TUNNEL_KEY_ATTR_TTL:
 381                         SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl,
 382                                         nla_get_u8(a), is_mask);
 383                         ttl = true;
 384                         break;
 385                 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
 386                         tun_flags |= TUNNEL_DONT_FRAGMENT;
 387                         break;
 388                 case OVS_TUNNEL_KEY_ATTR_CSUM:
 389                         tun_flags |= TUNNEL_CSUM;
 390                         break;
 391                 default:
 392                         return -EINVAL;
 393                 }
 394         }
 395
 396         SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
 397
 398         if (rem > 0) {
 399                 OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem);
 400                 return -EINVAL;
 401         }
 402
 403         if (!is_mask) {
 404                 if (!match->key->tun_key.ipv4_dst) {
 405                         OVS_NLERR("IPv4 tunnel destination address is zero.\n");
 406                         return -EINVAL;
 407                 }
 408
 409                 if (!ttl) {
 410                         OVS_NLERR("IPv4 tunnel TTL not specified.\n");
 411                         return -EINVAL;
 412                 }
 413         }
 414
 415         return 0;
 416 }
 417
 418 static int ipv4_tun_to_nlattr(struct sk_buff *skb,
 419                               const struct ovs_key_ipv4_tunnel *tun_key,
 420                               const struct ovs_key_ipv4_tunnel *output)
 421 {
 422         struct nlattr *nla;
 423
 424         nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
 425         if (!nla)
 426                 return -EMSGSIZE;
 427
 428         if (output->tun_flags & TUNNEL_KEY &&
 429             nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id))
 430                 return -EMSGSIZE;
 431         if (output->ipv4_src &&
 432                 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src))
 433                 return -EMSGSIZE;
 434         if (output->ipv4_dst &&
 435                 nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst))
 436                 return -EMSGSIZE;
 437         if (output->ipv4_tos &&
 438                 nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos))
 439                 return -EMSGSIZE;
 440         if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl))
 441                 return -EMSGSIZE;
 442         if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
 443                 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
 444                 return -EMSGSIZE;
 445         if ((output->tun_flags & TUNNEL_CSUM) &&
 446                 nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
 447                 return -EMSGSIZE;
 448
 449         nla_nest_end(skb, nla);
 450         return 0;
 451 }
 452
 453
 454 static int metadata_from_nlattrs(struct sw_flow_match *match,  u64 *attrs,
 455                                  const struct nlattr **a, bool is_mask)
 456 {
 457         if (*attrs & (1ULL << OVS_KEY_ATTR_PRIORITY)) {
 458                 SW_FLOW_KEY_PUT(match, phy.priority,
 459                           nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
 460                 *attrs &= ~(1ULL << OVS_KEY_ATTR_PRIORITY);
 461         }
 462
 463         if (*attrs & (1ULL << OVS_KEY_ATTR_IN_PORT)) {
 464                 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
 465
 466                 if (is_mask)
 467                         in_port = 0xffffffff; /* Always exact match in_port. */
 468                 else if (in_port >= DP_MAX_PORTS)
 469                         return -EINVAL;
 470
 471                 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
 472                 *attrs &= ~(1ULL << OVS_KEY_ATTR_IN_PORT);
 473         } else if (!is_mask) {
 474                 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
 475         }
 476
 477         if (*attrs & (1ULL << OVS_KEY_ATTR_SKB_MARK)) {
 478                 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
 479
 480                 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
 481                 *attrs &= ~(1ULL << OVS_KEY_ATTR_SKB_MARK);
 482         }
 483         if (*attrs & (1ULL << OVS_KEY_ATTR_TUNNEL)) {
 484                 if (ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
 485                                          is_mask))
 486                         return -EINVAL;
 487                 *attrs &= ~(1ULL << OVS_KEY_ATTR_TUNNEL);
 488         }
 489         return 0;
 490 }
 491
 492 static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs,
 493                                 const struct nlattr **a, bool is_mask)
 494 {
 495         int err;
 496         u64 orig_attrs = attrs;
 497
 498         err = metadata_from_nlattrs(match, &attrs, a, is_mask);
 499         if (err)
 500                 return err;
 501
 502         if (attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) {
 503                 const struct ovs_key_ethernet *eth_key;
 504
 505                 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
 506                 SW_FLOW_KEY_MEMCPY(match, eth.src,
 507                                 eth_key->eth_src, ETH_ALEN, is_mask);
 508                 SW_FLOW_KEY_MEMCPY(match, eth.dst,
 509                                 eth_key->eth_dst, ETH_ALEN, is_mask);
 510                 attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERNET);
 511         }
 512
 513         if (attrs & (1ULL << OVS_KEY_ATTR_VLAN)) {
 514                 __be16 tci;
 515
 516                 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
 517                 if (!(tci & htons(VLAN_TAG_PRESENT))) {
 518                         if (is_mask)
 519                                 OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n");
 520                         else
 521                                 OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n");
 522
 523                         return -EINVAL;
 524                 }
 525
 526                 SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask);
 527                 attrs &= ~(1ULL << OVS_KEY_ATTR_VLAN);
 528         } else if (!is_mask)
 529                 SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true);
 530
 531         if (attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) {
 532                 __be16 eth_type;
 533
 534                 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
 535                 if (is_mask) {
 536                         /* Always exact match EtherType. */
 537                         eth_type = htons(0xffff);
 538                 } else if (ntohs(eth_type) < ETH_P_802_3_MIN) {
 539                         OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n",
 540                                         ntohs(eth_type), ETH_P_802_3_MIN);
 541                         return -EINVAL;
 542                 }
 543
 544                 SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
 545                 attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
 546         } else if (!is_mask) {
 547                 SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
 548         }
 549
 550         if (attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
 551                 const struct ovs_key_ipv4 *ipv4_key;
 552
 553                 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
 554                 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
 555                         OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n",
 556                                 ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
 557                         return -EINVAL;
 558                 }
 559                 SW_FLOW_KEY_PUT(match, ip.proto,
 560                                 ipv4_key->ipv4_proto, is_mask);
 561                 SW_FLOW_KEY_PUT(match, ip.tos,
 562                                 ipv4_key->ipv4_tos, is_mask);
 563                 SW_FLOW_KEY_PUT(match, ip.ttl,
 564                                 ipv4_key->ipv4_ttl, is_mask);
 565                 SW_FLOW_KEY_PUT(match, ip.frag,
 566                                 ipv4_key->ipv4_frag, is_mask);
 567                 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
 568                                 ipv4_key->ipv4_src, is_mask);
 569                 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
 570                                 ipv4_key->ipv4_dst, is_mask);
 571                 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV4);
 572         }
 573
 574         if (attrs & (1ULL << OVS_KEY_ATTR_IPV6)) {
 575                 const struct ovs_key_ipv6 *ipv6_key;
 576
 577                 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
 578                 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
 579                         OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n",
 580                                 ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
 581                         return -EINVAL;
 582                 }
 583                 SW_FLOW_KEY_PUT(match, ipv6.label,
 584                                 ipv6_key->ipv6_label, is_mask);
 585                 SW_FLOW_KEY_PUT(match, ip.proto,
 586                                 ipv6_key->ipv6_proto, is_mask);
 587                 SW_FLOW_KEY_PUT(match, ip.tos,
 588                                 ipv6_key->ipv6_tclass, is_mask);
 589                 SW_FLOW_KEY_PUT(match, ip.ttl,
 590                                 ipv6_key->ipv6_hlimit, is_mask);
 591                 SW_FLOW_KEY_PUT(match, ip.frag,
 592                                 ipv6_key->ipv6_frag, is_mask);
 593                 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
 594                                 ipv6_key->ipv6_src,
 595                                 sizeof(match->key->ipv6.addr.src),
 596                                 is_mask);
 597                 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
 598                                 ipv6_key->ipv6_dst,
 599                                 sizeof(match->key->ipv6.addr.dst),
 600                                 is_mask);
 601
 602                 attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6);
 603         }
 604
 605         if (attrs & (1ULL << OVS_KEY_ATTR_ARP)) {
 606                 const struct ovs_key_arp *arp_key;
 607
 608                 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
 609                 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
 610                         OVS_NLERR("Unknown ARP opcode (opcode=%d).\n",
 611                                   arp_key->arp_op);
 612                         return -EINVAL;
 613                 }
 614
 615                 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
 616                                 arp_key->arp_sip, is_mask);
 617                 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
 618                         arp_key->arp_tip, is_mask);
 619                 SW_FLOW_KEY_PUT(match, ip.proto,
 620                                 ntohs(arp_key->arp_op), is_mask);
 621                 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
 622                                 arp_key->arp_sha, ETH_ALEN, is_mask);
 623                 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
 624                                 arp_key->arp_tha, ETH_ALEN, is_mask);
 625
 626                 attrs &= ~(1ULL << OVS_KEY_ATTR_ARP);
 627         }
 628
 629         if (attrs & (1ULL << OVS_KEY_ATTR_TCP)) {
 630                 const struct ovs_key_tcp *tcp_key;
 631
 632                 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
 633                 if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
 634                         SW_FLOW_KEY_PUT(match, ipv4.tp.src,
 635                                         tcp_key->tcp_src, is_mask);
 636                         SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
 637                                         tcp_key->tcp_dst, is_mask);
 638                 } else {
 639                         SW_FLOW_KEY_PUT(match, ipv6.tp.src,
 640                                         tcp_key->tcp_src, is_mask);
 641                         SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
 642                                         tcp_key->tcp_dst, is_mask);
 643                 }
 644                 attrs &= ~(1ULL << OVS_KEY_ATTR_TCP);
 645         }
 646
 647         if (attrs & (1ULL << OVS_KEY_ATTR_TCP_FLAGS)) {
 648                 if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
 649                         SW_FLOW_KEY_PUT(match, ipv4.tp.flags,
 650                                         nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
 651                                         is_mask);
 652                 } else {
 653                         SW_FLOW_KEY_PUT(match, ipv6.tp.flags,
 654                                         nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
 655                                         is_mask);
 656                 }
 657                 attrs &= ~(1ULL << OVS_KEY_ATTR_TCP_FLAGS);
 658         }
 659
 660         if (attrs & (1ULL << OVS_KEY_ATTR_UDP)) {
 661                 const struct ovs_key_udp *udp_key;
 662
 663                 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
 664                 if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
 665                         SW_FLOW_KEY_PUT(match, ipv4.tp.src,
 666                                         udp_key->udp_src, is_mask);
 667                         SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
 668                                         udp_key->udp_dst, is_mask);
 669                 } else {
 670                         SW_FLOW_KEY_PUT(match, ipv6.tp.src,
 671                                         udp_key->udp_src, is_mask);
 672                         SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
 673                                         udp_key->udp_dst, is_mask);
 674                 }
 675                 attrs &= ~(1ULL << OVS_KEY_ATTR_UDP);
 676         }
 677
 678         if (attrs & (1ULL << OVS_KEY_ATTR_SCTP)) {
 679                 const struct ovs_key_sctp *sctp_key;
 680
 681                 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
 682                 if (orig_attrs & (1ULL << OVS_KEY_ATTR_IPV4)) {
 683                         SW_FLOW_KEY_PUT(match, ipv4.tp.src,
 684                                         sctp_key->sctp_src, is_mask);
 685                         SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
 686                                         sctp_key->sctp_dst, is_mask);
 687                 } else {
 688                         SW_FLOW_KEY_PUT(match, ipv6.tp.src,
 689                                         sctp_key->sctp_src, is_mask);
 690                         SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
 691                                         sctp_key->sctp_dst, is_mask);
 692                 }
 693                 attrs &= ~(1ULL << OVS_KEY_ATTR_SCTP);
 694         }
 695
 696         if (attrs & (1ULL << OVS_KEY_ATTR_ICMP)) {
 697                 const struct ovs_key_icmp *icmp_key;
 698
 699                 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
 700                 SW_FLOW_KEY_PUT(match, ipv4.tp.src,
 701                                 htons(icmp_key->icmp_type), is_mask);
 702                 SW_FLOW_KEY_PUT(match, ipv4.tp.dst,
 703                                 htons(icmp_key->icmp_code), is_mask);
 704                 attrs &= ~(1ULL << OVS_KEY_ATTR_ICMP);
 705         }
 706
 707         if (attrs & (1ULL << OVS_KEY_ATTR_ICMPV6)) {
 708                 const struct ovs_key_icmpv6 *icmpv6_key;
 709
 710                 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
 711                 SW_FLOW_KEY_PUT(match, ipv6.tp.src,
 712                                 htons(icmpv6_key->icmpv6_type), is_mask);
 713                 SW_FLOW_KEY_PUT(match, ipv6.tp.dst,
 714                                 htons(icmpv6_key->icmpv6_code), is_mask);
 715                 attrs &= ~(1ULL << OVS_KEY_ATTR_ICMPV6);
 716         }
 717
 718         if (attrs & (1ULL << OVS_KEY_ATTR_ND)) {
 719                 const struct ovs_key_nd *nd_key;
 720
 721                 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
 722                 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
 723                         nd_key->nd_target,
 724                         sizeof(match->key->ipv6.nd.target),
 725                         is_mask);
 726                 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
 727                         nd_key->nd_sll, ETH_ALEN, is_mask);
 728                 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
 729                                 nd_key->nd_tll, ETH_ALEN, is_mask);
 730                 attrs &= ~(1ULL << OVS_KEY_ATTR_ND);
 731         }
 732
 733         if (attrs != 0)
 734                 return -EINVAL;
 735
 736         return 0;
 737 }
 738
 739 static void sw_flow_mask_set(struct sw_flow_mask *mask,
 740                              struct sw_flow_key_range *range, u8 val)
 741 {
 742         u8 *m = (u8 *)&mask->key + range->start;
 743
 744         mask->range = *range;
 745         memset(m, val, range_n_bytes(range));
 746 }
 747
 748 /**
 749  * ovs_nla_get_match - parses Netlink attributes into a flow key and
 750  * mask. In case the 'mask' is NULL, the flow is treated as exact match
 751  * flow. Otherwise, it is treated as a wildcarded flow, except the mask
 752  * does not include any don't care bit.
 753  * @match: receives the extracted flow match information.
 754  * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
 755  * sequence. The fields should of the packet that triggered the creation
 756  * of this flow.
 757  * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
 758  * attribute specifies the mask field of the wildcarded flow.
 759  */
 760 int ovs_nla_get_match(struct sw_flow_match *match,
 761                       const struct nlattr *key,
 762                       const struct nlattr *mask)
 763 {
 764         const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
 765         const struct nlattr *encap;
 766         u64 key_attrs = 0;
 767         u64 mask_attrs = 0;
 768         bool encap_valid = false;
 769         int err;
 770
 771         err = parse_flow_nlattrs(key, a, &key_attrs);
 772         if (err)
 773                 return err;
 774
 775         if ((key_attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
 776             (key_attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)) &&
 777             (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) {
 778                 __be16 tci;
 779
 780                 if (!((key_attrs & (1ULL << OVS_KEY_ATTR_VLAN)) &&
 781                       (key_attrs & (1ULL << OVS_KEY_ATTR_ENCAP)))) {
 782                         OVS_NLERR("Invalid Vlan frame.\n");
 783                         return -EINVAL;
 784                 }
 785
 786                 key_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
 787                 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
 788                 encap = a[OVS_KEY_ATTR_ENCAP];
 789                 key_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
 790                 encap_valid = true;
 791
 792                 if (tci & htons(VLAN_TAG_PRESENT)) {
 793                         err = parse_flow_nlattrs(encap, a, &key_attrs);
 794                         if (err)
 795                                 return err;
 796                 } else if (!tci) {
 797                         /* Corner case for truncated 802.1Q header. */
 798                         if (nla_len(encap)) {
 799                                 OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n");
 800                                 return -EINVAL;
 801                         }
 802                 } else {
 803                         OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n");
 804                         return  -EINVAL;
 805                 }
 806         }
 807
 808         err = ovs_key_from_nlattrs(match, key_attrs, a, false);
 809         if (err)
 810                 return err;
 811
 812         if (mask) {
 813                 err = parse_flow_mask_nlattrs(mask, a, &mask_attrs);
 814                 if (err)
 815                         return err;
 816
 817                 if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP)  {
 818                         __be16 eth_type = 0;
 819                         __be16 tci = 0;
 820
 821                         if (!encap_valid) {
 822                                 OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n");
 823                                 return  -EINVAL;
 824                         }
 825
 826                         mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ENCAP);
 827                         if (a[OVS_KEY_ATTR_ETHERTYPE])
 828                                 eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
 829
 830                         if (eth_type == htons(0xffff)) {
 831                                 mask_attrs &= ~(1ULL << OVS_KEY_ATTR_ETHERTYPE);
 832                                 encap = a[OVS_KEY_ATTR_ENCAP];
 833                                 err = parse_flow_mask_nlattrs(encap, a, &mask_attrs);
 834                         } else {
 835                                 OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n",
 836                                                 ntohs(eth_type));
 837                                 return -EINVAL;
 838                         }
 839
 840                         if (a[OVS_KEY_ATTR_VLAN])
 841                                 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
 842
 843                         if (!(tci & htons(VLAN_TAG_PRESENT))) {
 844                                 OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci));
 845                                 return -EINVAL;
 846                         }
 847                 }
 848
 849                 err = ovs_key_from_nlattrs(match, mask_attrs, a, true);
 850                 if (err)
 851                         return err;
 852         } else {
 853                 /* Populate exact match flow's key mask. */
 854                 if (match->mask)
 855                         sw_flow_mask_set(match->mask, &match->range, 0xff);
 856         }
 857
 858         if (!match_validate(match, key_attrs, mask_attrs))
 859                 return -EINVAL;
 860
 861         return 0;
 862 }
 863
 864 /**
 865  * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
 866  * @flow: Receives extracted in_port, priority, tun_key and skb_mark.
 867  * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
 868  * sequence.
 869  *
 870  * This parses a series of Netlink attributes that form a flow key, which must
 871  * take the same form accepted by flow_from_nlattrs(), but only enough of it to
 872  * get the metadata, that is, the parts of the flow key that cannot be
 873  * extracted from the packet itself.
 874  */
 875
 876 int ovs_nla_get_flow_metadata(struct sw_flow *flow,
 877                               const struct nlattr *attr)
 878 {
 879         struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key;
 880         const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
 881         u64 attrs = 0;
 882         int err;
 883         struct sw_flow_match match;
 884
 885         flow->key.phy.in_port = DP_MAX_PORTS;
 886         flow->key.phy.priority = 0;
 887         flow->key.phy.skb_mark = 0;
 888         memset(tun_key, 0, sizeof(flow->key.tun_key));
 889
 890         err = parse_flow_nlattrs(attr, a, &attrs);
 891         if (err)
 892                 return -EINVAL;
 893
 894         memset(&match, 0, sizeof(match));
 895         match.key = &flow->key;
 896
 897         err = metadata_from_nlattrs(&match, &attrs, a, false);
 898         if (err)
 899                 return err;
 900
 901         return 0;
 902 }
 903
 904 int ovs_nla_put_flow(const struct sw_flow_key *swkey,
 905                      const struct sw_flow_key *output, struct sk_buff *skb)
 906 {
 907         struct ovs_key_ethernet *eth_key;
 908         struct nlattr *nla, *encap;
 909         bool is_mask = (swkey != output);
 910
 911         if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
 912                 goto nla_put_failure;
 913
 914         if ((swkey->tun_key.ipv4_dst || is_mask) &&
 915             ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key))
 916                 goto nla_put_failure;
 917
 918         if (swkey->phy.in_port == DP_MAX_PORTS) {
 919                 if (is_mask && (output->phy.in_port == 0xffff))
 920                         if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
 921                                 goto nla_put_failure;
 922         } else {
 923                 u16 upper_u16;
 924                 upper_u16 = !is_mask ? 0 : 0xffff;
 925
 926                 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
 927                                 (upper_u16 << 16) | output->phy.in_port))
 928                         goto nla_put_failure;
 929         }
 930
 931         if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
 932                 goto nla_put_failure;
 933
 934         nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
 935         if (!nla)
 936                 goto nla_put_failure;
 937
 938         eth_key = nla_data(nla);
 939         ether_addr_copy(eth_key->eth_src, output->eth.src);
 940         ether_addr_copy(eth_key->eth_dst, output->eth.dst);
 941
 942         if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) {
 943                 __be16 eth_type;
 944                 eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff);
 945                 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
 946                     nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci))
 947                         goto nla_put_failure;
 948                 encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
 949                 if (!swkey->eth.tci)
 950                         goto unencap;
 951         } else
 952                 encap = NULL;
 953
 954         if (swkey->eth.type == htons(ETH_P_802_2)) {
 955                 /*
 956                  * Ethertype 802.2 is represented in the netlink with omitted
 957                  * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
 958                  * 0xffff in the mask attribute.  Ethertype can also
 959                  * be wildcarded.
 960                  */
 961                 if (is_mask && output->eth.type)
 962                         if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
 963                                                 output->eth.type))
 964                                 goto nla_put_failure;
 965                 goto unencap;
 966         }
 967
 968         if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
 969                 goto nla_put_failure;
 970
 971         if (swkey->eth.type == htons(ETH_P_IP)) {
 972                 struct ovs_key_ipv4 *ipv4_key;
 973
 974                 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
 975                 if (!nla)
 976                         goto nla_put_failure;
 977                 ipv4_key = nla_data(nla);
 978                 ipv4_key->ipv4_src = output->ipv4.addr.src;
 979                 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
 980                 ipv4_key->ipv4_proto = output->ip.proto;
 981                 ipv4_key->ipv4_tos = output->ip.tos;
 982                 ipv4_key->ipv4_ttl = output->ip.ttl;
 983                 ipv4_key->ipv4_frag = output->ip.frag;
 984         } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
 985                 struct ovs_key_ipv6 *ipv6_key;
 986
 987                 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
 988                 if (!nla)
 989                         goto nla_put_failure;
 990                 ipv6_key = nla_data(nla);
 991                 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
 992                                 sizeof(ipv6_key->ipv6_src));
 993                 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
 994                                 sizeof(ipv6_key->ipv6_dst));
 995                 ipv6_key->ipv6_label = output->ipv6.label;
 996                 ipv6_key->ipv6_proto = output->ip.proto;
 997                 ipv6_key->ipv6_tclass = output->ip.tos;
 998                 ipv6_key->ipv6_hlimit = output->ip.ttl;
 999                 ipv6_key->ipv6_frag = output->ip.frag;
1000         } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1001                    swkey->eth.type == htons(ETH_P_RARP)) {
1002                 struct ovs_key_arp *arp_key;
1003
1004                 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1005                 if (!nla)
1006                         goto nla_put_failure;
1007                 arp_key = nla_data(nla);
1008                 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1009                 arp_key->arp_sip = output->ipv4.addr.src;
1010                 arp_key->arp_tip = output->ipv4.addr.dst;
1011                 arp_key->arp_op = htons(output->ip.proto);
1012                 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1013                 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
1014         }
1015
1016         if ((swkey->eth.type == htons(ETH_P_IP) ||
1017              swkey->eth.type == htons(ETH_P_IPV6)) &&
1018              swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1019
1020                 if (swkey->ip.proto == IPPROTO_TCP) {
1021                         struct ovs_key_tcp *tcp_key;
1022
1023                         nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1024                         if (!nla)
1025                                 goto nla_put_failure;
1026                         tcp_key = nla_data(nla);
1027                         if (swkey->eth.type == htons(ETH_P_IP)) {
1028                                 tcp_key->tcp_src = output->ipv4.tp.src;
1029                                 tcp_key->tcp_dst = output->ipv4.tp.dst;
1030                                 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1031                                                  output->ipv4.tp.flags))
1032                                         goto nla_put_failure;
1033                         } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1034                                 tcp_key->tcp_src = output->ipv6.tp.src;
1035                                 tcp_key->tcp_dst = output->ipv6.tp.dst;
1036                                 if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1037                                                  output->ipv6.tp.flags))
1038                                         goto nla_put_failure;
1039                         }
1040                 } else if (swkey->ip.proto == IPPROTO_UDP) {
1041                         struct ovs_key_udp *udp_key;
1042
1043                         nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1044                         if (!nla)
1045                                 goto nla_put_failure;
1046                         udp_key = nla_data(nla);
1047                         if (swkey->eth.type == htons(ETH_P_IP)) {
1048                                 udp_key->udp_src = output->ipv4.tp.src;
1049                                 udp_key->udp_dst = output->ipv4.tp.dst;
1050                         } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1051                                 udp_key->udp_src = output->ipv6.tp.src;
1052                                 udp_key->udp_dst = output->ipv6.tp.dst;
1053                         }
1054                 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1055                         struct ovs_key_sctp *sctp_key;
1056
1057                         nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1058                         if (!nla)
1059                                 goto nla_put_failure;
1060                         sctp_key = nla_data(nla);
1061                         if (swkey->eth.type == htons(ETH_P_IP)) {
1062                                 sctp_key->sctp_src = swkey->ipv4.tp.src;
1063                                 sctp_key->sctp_dst = swkey->ipv4.tp.dst;
1064                         } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1065                                 sctp_key->sctp_src = swkey->ipv6.tp.src;
1066                                 sctp_key->sctp_dst = swkey->ipv6.tp.dst;
1067                         }
1068                 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1069                            swkey->ip.proto == IPPROTO_ICMP) {
1070                         struct ovs_key_icmp *icmp_key;
1071
1072                         nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1073                         if (!nla)
1074                                 goto nla_put_failure;
1075                         icmp_key = nla_data(nla);
1076                         icmp_key->icmp_type = ntohs(output->ipv4.tp.src);
1077                         icmp_key->icmp_code = ntohs(output->ipv4.tp.dst);
1078                 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1079                            swkey->ip.proto == IPPROTO_ICMPV6) {
1080                         struct ovs_key_icmpv6 *icmpv6_key;
1081
1082                         nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1083                                                 sizeof(*icmpv6_key));
1084                         if (!nla)
1085                                 goto nla_put_failure;
1086                         icmpv6_key = nla_data(nla);
1087                         icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src);
1088                         icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst);
1089
1090                         if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1091                             icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1092                                 struct ovs_key_nd *nd_key;
1093
1094                                 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1095                                 if (!nla)
1096                                         goto nla_put_failure;
1097                                 nd_key = nla_data(nla);
1098                                 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1099                                                         sizeof(nd_key->nd_target));
1100                                 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1101                                 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
1102                         }
1103                 }
1104         }
1105
1106 unencap:
1107         if (encap)
1108                 nla_nest_end(skb, encap);
1109
1110         return 0;
1111
1112 nla_put_failure:
1113         return -EMSGSIZE;
1114 }
1115
1116 #define MAX_ACTIONS_BUFSIZE     (32 * 1024)
1117
1118 struct sw_flow_actions *ovs_nla_alloc_flow_actions(int size)
1119 {
1120         struct sw_flow_actions *sfa;
1121
1122         if (size > MAX_ACTIONS_BUFSIZE)
1123                 return ERR_PTR(-EINVAL);
1124
1125         sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1126         if (!sfa)
1127                 return ERR_PTR(-ENOMEM);
1128
1129         sfa->actions_len = 0;
1130         return sfa;
1131 }
1132
1133 /* RCU callback used by ovs_nla_free_flow_actions. */
1134 static void rcu_free_acts_callback(struct rcu_head *rcu)
1135 {
1136         struct sw_flow_actions *sf_acts = container_of(rcu,
1137                         struct sw_flow_actions, rcu);
1138         kfree(sf_acts);
1139 }
1140
1141 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
1142  * The caller must hold rcu_read_lock for this to be sensible. */
1143 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1144 {
1145         call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
1146 }
1147
1148 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
1149                                        int attr_len)
1150 {
1151
1152         struct sw_flow_actions *acts;
1153         int new_acts_size;
1154         int req_size = NLA_ALIGN(attr_len);
1155         int next_offset = offsetof(struct sw_flow_actions, actions) +
1156                                         (*sfa)->actions_len;
1157
1158         if (req_size <= (ksize(*sfa) - next_offset))
1159                 goto out;
1160
1161         new_acts_size = ksize(*sfa) * 2;
1162
1163         if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1164                 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1165                         return ERR_PTR(-EMSGSIZE);
1166                 new_acts_size = MAX_ACTIONS_BUFSIZE;
1167         }
1168
1169         acts = ovs_nla_alloc_flow_actions(new_acts_size);
1170         if (IS_ERR(acts))
1171                 return (void *)acts;
1172
1173         memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1174         acts->actions_len = (*sfa)->actions_len;
1175         kfree(*sfa);
1176         *sfa = acts;
1177
1178 out:
1179         (*sfa)->actions_len += req_size;
1180         return  (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1181 }
1182
1183 static int add_action(struct sw_flow_actions **sfa, int attrtype, void *data, int len)
1184 {
1185         struct nlattr *a;
1186
1187         a = reserve_sfa_size(sfa, nla_attr_size(len));
1188         if (IS_ERR(a))
1189                 return PTR_ERR(a);
1190
1191         a->nla_type = attrtype;
1192         a->nla_len = nla_attr_size(len);
1193
1194         if (data)
1195                 memcpy(nla_data(a), data, len);
1196         memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1197
1198         return 0;
1199 }
1200
1201 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
1202                                           int attrtype)
1203 {
1204         int used = (*sfa)->actions_len;
1205         int err;
1206
1207         err = add_action(sfa, attrtype, NULL, 0);
1208         if (err)
1209                 return err;
1210
1211         return used;
1212 }
1213
1214 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
1215                                          int st_offset)
1216 {
1217         struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
1218                                                                st_offset);
1219
1220         a->nla_len = sfa->actions_len - st_offset;
1221 }
1222
1223 static int validate_and_copy_sample(const struct nlattr *attr,
1224                                     const struct sw_flow_key *key, int depth,
1225                                     struct sw_flow_actions **sfa)
1226 {
1227         const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
1228         const struct nlattr *probability, *actions;
1229         const struct nlattr *a;
1230         int rem, start, err, st_acts;
1231
1232         memset(attrs, 0, sizeof(attrs));
1233         nla_for_each_nested(a, attr, rem) {
1234                 int type = nla_type(a);
1235                 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
1236                         return -EINVAL;
1237                 attrs[type] = a;
1238         }
1239         if (rem)
1240                 return -EINVAL;
1241
1242         probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
1243         if (!probability || nla_len(probability) != sizeof(u32))
1244                 return -EINVAL;
1245
1246         actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
1247         if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
1248                 return -EINVAL;
1249
1250         /* validation done, copy sample action. */
1251         start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE);
1252         if (start < 0)
1253                 return start;
1254         err = add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
1255                          nla_data(probability), sizeof(u32));
1256         if (err)
1257                 return err;
1258         st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS);
1259         if (st_acts < 0)
1260                 return st_acts;
1261
1262         err = ovs_nla_copy_actions(actions, key, depth + 1, sfa);
1263         if (err)
1264                 return err;
1265
1266         add_nested_action_end(*sfa, st_acts);
1267         add_nested_action_end(*sfa, start);
1268
1269         return 0;
1270 }
1271
1272 static int validate_tp_port(const struct sw_flow_key *flow_key)
1273 {
1274         if (flow_key->eth.type == htons(ETH_P_IP)) {
1275                 if (flow_key->ipv4.tp.src || flow_key->ipv4.tp.dst)
1276                         return 0;
1277         } else if (flow_key->eth.type == htons(ETH_P_IPV6)) {
1278                 if (flow_key->ipv6.tp.src || flow_key->ipv6.tp.dst)
1279                         return 0;
1280         }
1281
1282         return -EINVAL;
1283 }
1284
1285 void ovs_match_init(struct sw_flow_match *match,
1286                     struct sw_flow_key *key,
1287                     struct sw_flow_mask *mask)
1288 {
1289         memset(match, 0, sizeof(*match));
1290         match->key = key;
1291         match->mask = mask;
1292
1293         memset(key, 0, sizeof(*key));
1294
1295         if (mask) {
1296                 memset(&mask->key, 0, sizeof(mask->key));
1297                 mask->range.start = mask->range.end = 0;
1298         }
1299 }
1300
1301 static int validate_and_copy_set_tun(const struct nlattr *attr,
1302                                      struct sw_flow_actions **sfa)
1303 {
1304         struct sw_flow_match match;
1305         struct sw_flow_key key;
1306         int err, start;
1307
1308         ovs_match_init(&match, &key, NULL);
1309         err = ipv4_tun_from_nlattr(nla_data(attr), &match, false);
1310         if (err)
1311                 return err;
1312
1313         start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET);
1314         if (start < 0)
1315                 return start;
1316
1317         err = add_action(sfa, OVS_KEY_ATTR_IPV4_TUNNEL, &match.key->tun_key,
1318                         sizeof(match.key->tun_key));
1319         add_nested_action_end(*sfa, start);
1320
1321         return err;
1322 }
1323
1324 static int validate_set(const struct nlattr *a,
1325                         const struct sw_flow_key *flow_key,
1326                         struct sw_flow_actions **sfa,
1327                         bool *set_tun)
1328 {
1329         const struct nlattr *ovs_key = nla_data(a);
1330         int key_type = nla_type(ovs_key);
1331
1332         /* There can be only one key in a action */
1333         if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
1334                 return -EINVAL;
1335
1336         if (key_type > OVS_KEY_ATTR_MAX ||
1337             (ovs_key_lens[key_type] != nla_len(ovs_key) &&
1338              ovs_key_lens[key_type] != -1))
1339                 return -EINVAL;
1340
1341         switch (key_type) {
1342         const struct ovs_key_ipv4 *ipv4_key;
1343         const struct ovs_key_ipv6 *ipv6_key;
1344         int err;
1345
1346         case OVS_KEY_ATTR_PRIORITY:
1347         case OVS_KEY_ATTR_SKB_MARK:
1348         case OVS_KEY_ATTR_ETHERNET:
1349                 break;
1350
1351         case OVS_KEY_ATTR_TUNNEL:
1352                 *set_tun = true;
1353                 err = validate_and_copy_set_tun(a, sfa);
1354                 if (err)
1355                         return err;
1356                 break;
1357
1358         case OVS_KEY_ATTR_IPV4:
1359                 if (flow_key->eth.type != htons(ETH_P_IP))
1360                         return -EINVAL;
1361
1362                 if (!flow_key->ip.proto)
1363                         return -EINVAL;
1364
1365                 ipv4_key = nla_data(ovs_key);
1366                 if (ipv4_key->ipv4_proto != flow_key->ip.proto)
1367                         return -EINVAL;
1368
1369                 if (ipv4_key->ipv4_frag != flow_key->ip.frag)
1370                         return -EINVAL;
1371
1372                 break;
1373
1374         case OVS_KEY_ATTR_IPV6:
1375                 if (flow_key->eth.type != htons(ETH_P_IPV6))
1376                         return -EINVAL;
1377
1378                 if (!flow_key->ip.proto)
1379                         return -EINVAL;
1380
1381                 ipv6_key = nla_data(ovs_key);
1382                 if (ipv6_key->ipv6_proto != flow_key->ip.proto)
1383                         return -EINVAL;
1384
1385                 if (ipv6_key->ipv6_frag != flow_key->ip.frag)
1386                         return -EINVAL;
1387
1388                 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
1389                         return -EINVAL;
1390
1391                 break;
1392
1393         case OVS_KEY_ATTR_TCP:
1394                 if (flow_key->ip.proto != IPPROTO_TCP)
1395                         return -EINVAL;
1396
1397                 return validate_tp_port(flow_key);
1398
1399         case OVS_KEY_ATTR_UDP:
1400                 if (flow_key->ip.proto != IPPROTO_UDP)
1401                         return -EINVAL;
1402
1403                 return validate_tp_port(flow_key);
1404
1405         case OVS_KEY_ATTR_SCTP:
1406                 if (flow_key->ip.proto != IPPROTO_SCTP)
1407                         return -EINVAL;
1408
1409                 return validate_tp_port(flow_key);
1410
1411         default:
1412                 return -EINVAL;
1413         }
1414
1415         return 0;
1416 }
1417
1418 static int validate_userspace(const struct nlattr *attr)
1419 {
1420         static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
1421                 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
1422                 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
1423         };
1424         struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
1425         int error;
1426
1427         error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
1428                                  attr, userspace_policy);
1429         if (error)
1430                 return error;
1431
1432         if (!a[OVS_USERSPACE_ATTR_PID] ||
1433             !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
1434                 return -EINVAL;
1435
1436         return 0;
1437 }
1438
1439 static int copy_action(const struct nlattr *from,
1440                        struct sw_flow_actions **sfa)
1441 {
1442         int totlen = NLA_ALIGN(from->nla_len);
1443         struct nlattr *to;
1444
1445         to = reserve_sfa_size(sfa, from->nla_len);
1446         if (IS_ERR(to))
1447                 return PTR_ERR(to);
1448
1449         memcpy(to, from, totlen);
1450         return 0;
1451 }
1452
1453 int ovs_nla_copy_actions(const struct nlattr *attr,
1454                          const struct sw_flow_key *key,
1455                          int depth,
1456                          struct sw_flow_actions **sfa)
1457 {
1458         const struct nlattr *a;
1459         int rem, err;
1460
1461         if (depth >= SAMPLE_ACTION_DEPTH)
1462                 return -EOVERFLOW;
1463
1464         nla_for_each_nested(a, attr, rem) {
1465                 /* Expected argument lengths, (u32)-1 for variable length. */
1466                 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
1467                         [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
1468                         [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
1469                         [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
1470                         [OVS_ACTION_ATTR_POP_VLAN] = 0,
1471                         [OVS_ACTION_ATTR_SET] = (u32)-1,
1472                         [OVS_ACTION_ATTR_SAMPLE] = (u32)-1
1473                 };
1474                 const struct ovs_action_push_vlan *vlan;
1475                 int type = nla_type(a);
1476                 bool skip_copy;
1477
1478                 if (type > OVS_ACTION_ATTR_MAX ||
1479                     (action_lens[type] != nla_len(a) &&
1480                      action_lens[type] != (u32)-1))
1481                         return -EINVAL;
1482
1483                 skip_copy = false;
1484                 switch (type) {
1485                 case OVS_ACTION_ATTR_UNSPEC:
1486                         return -EINVAL;
1487
1488                 case OVS_ACTION_ATTR_USERSPACE:
1489                         err = validate_userspace(a);
1490                         if (err)
1491                                 return err;
1492                         break;
1493
1494                 case OVS_ACTION_ATTR_OUTPUT:
1495                         if (nla_get_u32(a) >= DP_MAX_PORTS)
1496                                 return -EINVAL;
1497                         break;
1498
1499
1500                 case OVS_ACTION_ATTR_POP_VLAN:
1501                         break;
1502
1503                 case OVS_ACTION_ATTR_PUSH_VLAN:
1504                         vlan = nla_data(a);
1505                         if (vlan->vlan_tpid != htons(ETH_P_8021Q))
1506                                 return -EINVAL;
1507                         if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
1508                                 return -EINVAL;
1509                         break;
1510
1511                 case OVS_ACTION_ATTR_SET:
1512                         err = validate_set(a, key, sfa, &skip_copy);
1513                         if (err)
1514                                 return err;
1515                         break;
1516
1517                 case OVS_ACTION_ATTR_SAMPLE:
1518                         err = validate_and_copy_sample(a, key, depth, sfa);
1519                         if (err)
1520                                 return err;
1521                         skip_copy = true;
1522                         break;
1523
1524                 default:
1525                         return -EINVAL;
1526                 }
1527                 if (!skip_copy) {
1528                         err = copy_action(a, sfa);
1529                         if (err)
1530                                 return err;
1531                 }
1532         }
1533
1534         if (rem > 0)
1535                 return -EINVAL;
1536
1537         return 0;
1538 }
1539
1540 static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
1541 {
1542         const struct nlattr *a;
1543         struct nlattr *start;
1544         int err = 0, rem;
1545
1546         start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
1547         if (!start)
1548                 return -EMSGSIZE;
1549
1550         nla_for_each_nested(a, attr, rem) {
1551                 int type = nla_type(a);
1552                 struct nlattr *st_sample;
1553
1554                 switch (type) {
1555                 case OVS_SAMPLE_ATTR_PROBABILITY:
1556                         if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
1557                                     sizeof(u32), nla_data(a)))
1558                                 return -EMSGSIZE;
1559                         break;
1560                 case OVS_SAMPLE_ATTR_ACTIONS:
1561                         st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
1562                         if (!st_sample)
1563                                 return -EMSGSIZE;
1564                         err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
1565                         if (err)
1566                                 return err;
1567                         nla_nest_end(skb, st_sample);
1568                         break;
1569                 }
1570         }
1571
1572         nla_nest_end(skb, start);
1573         return err;
1574 }
1575
1576 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
1577 {
1578         const struct nlattr *ovs_key = nla_data(a);
1579         int key_type = nla_type(ovs_key);
1580         struct nlattr *start;
1581         int err;
1582
1583         switch (key_type) {
1584         case OVS_KEY_ATTR_IPV4_TUNNEL:
1585                 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
1586                 if (!start)
1587                         return -EMSGSIZE;
1588
1589                 err = ipv4_tun_to_nlattr(skb, nla_data(ovs_key),
1590                                              nla_data(ovs_key));
1591                 if (err)
1592                         return err;
1593                 nla_nest_end(skb, start);
1594                 break;
1595         default:
1596                 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
1597                         return -EMSGSIZE;
1598                 break;
1599         }
1600
1601         return 0;
1602 }
1603
1604 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
1605 {
1606         const struct nlattr *a;
1607         int rem, err;
1608
1609         nla_for_each_attr(a, attr, len, rem) {
1610                 int type = nla_type(a);
1611
1612                 switch (type) {
1613                 case OVS_ACTION_ATTR_SET:
1614                         err = set_action_to_attr(a, skb);
1615                         if (err)
1616                                 return err;
1617                         break;
1618
1619                 case OVS_ACTION_ATTR_SAMPLE:
1620                         err = sample_action_to_attr(a, skb);
1621                         if (err)
1622                                 return err;
1623                         break;
1624                 default:
1625                         if (nla_put(skb, type, nla_len(a), nla_data(a)))
1626                                 return -EMSGSIZE;
1627                         break;
1628                 }
1629         }
1630
1631         return 0;
1632 }