lib/odp-execute.c

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
   3  * Copyright (c) 2013 Simon Horman
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at:
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 #include <config.h>
  19 #include "odp-execute.h"
  20 #include <arpa/inet.h>
  21 #include <netinet/in.h>
  22 #include <netinet/icmp6.h>
  23 #include <netinet/ip6.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "dp-packet.h"
  28 #include "dpif.h"
  29 #include "netlink.h"
  30 #include "odp-netlink.h"
  31 #include "odp-util.h"
  32 #include "packets.h"
  33 #include "flow.h"
  34 #include "unaligned.h"
  35 #include "util.h"
  36
  37 /* Masked copy of an ethernet address. 'src' is already properly masked. */
  38 static void
  39 ether_addr_copy_masked(struct eth_addr *dst, const struct eth_addr src,
  40                        const struct eth_addr mask)
  41 {
  42     int i;
  43
  44     for (i = 0; i < ARRAY_SIZE(dst->be16); i++) {
  45         dst->be16[i] = src.be16[i] | (dst->be16[i] & ~mask.be16[i]);
  46     }
  47 }
  48
  49 static void
  50 odp_eth_set_addrs(struct dp_packet *packet, const struct ovs_key_ethernet *key,
  51                   const struct ovs_key_ethernet *mask)
  52 {
  53     struct eth_header *eh = dp_packet_l2(packet);
  54
  55     if (eh) {
  56         if (!mask) {
  57             eh->eth_src = key->eth_src;
  58             eh->eth_dst = key->eth_dst;
  59         } else {
  60             ether_addr_copy_masked(&eh->eth_src, key->eth_src, mask->eth_src);
  61             ether_addr_copy_masked(&eh->eth_dst, key->eth_dst, mask->eth_dst);
  62         }
  63     }
  64 }
  65
  66 static void
  67 odp_set_ipv4(struct dp_packet *packet, const struct ovs_key_ipv4 *key,
  68              const struct ovs_key_ipv4 *mask)
  69 {
  70     struct ip_header *nh = dp_packet_l3(packet);
  71
  72     packet_set_ipv4(
  73         packet,
  74         key->ipv4_src | (get_16aligned_be32(&nh->ip_src) & ~mask->ipv4_src),
  75         key->ipv4_dst | (get_16aligned_be32(&nh->ip_dst) & ~mask->ipv4_dst),
  76         key->ipv4_tos | (nh->ip_tos & ~mask->ipv4_tos),
  77         key->ipv4_ttl | (nh->ip_ttl & ~mask->ipv4_ttl));
  78 }
  79
  80 static const ovs_be32 *
  81 mask_ipv6_addr(const ovs_16aligned_be32 *old, const ovs_be32 *addr,
  82                const ovs_be32 *mask, ovs_be32 *masked)
  83 {
  84     for (int i = 0; i < 4; i++) {
  85         masked[i] = addr[i] | (get_16aligned_be32(&old[i]) & ~mask[i]);
  86     }
  87
  88     return masked;
  89 }
  90
  91 static void
  92 odp_set_ipv6(struct dp_packet *packet, const struct ovs_key_ipv6 *key,
  93              const struct ovs_key_ipv6 *mask)
  94 {
  95     struct ovs_16aligned_ip6_hdr *nh = dp_packet_l3(packet);
  96     ovs_be32 sbuf[4], dbuf[4];
  97     uint8_t old_tc = ntohl(get_16aligned_be32(&nh->ip6_flow)) >> 20;
  98     ovs_be32 old_fl = get_16aligned_be32(&nh->ip6_flow) & htonl(0xfffff);
  99
 100     packet_set_ipv6(
 101         packet,
 102         mask_ipv6_addr(nh->ip6_src.be32, key->ipv6_src, mask->ipv6_src, sbuf),
 103         mask_ipv6_addr(nh->ip6_dst.be32, key->ipv6_dst, mask->ipv6_dst, dbuf),
 104         key->ipv6_tclass | (old_tc & ~mask->ipv6_tclass),
 105         key->ipv6_label | (old_fl & ~mask->ipv6_label),
 106         key->ipv6_hlimit | (nh->ip6_hlim & ~mask->ipv6_hlimit));
 107 }
 108
 109 static void
 110 odp_set_tcp(struct dp_packet *packet, const struct ovs_key_tcp *key,
 111              const struct ovs_key_tcp *mask)
 112 {
 113     struct tcp_header *th = dp_packet_l4(packet);
 114
 115     if (OVS_LIKELY(th && dp_packet_get_tcp_payload(packet))) {
 116         packet_set_tcp_port(packet,
 117                             key->tcp_src | (th->tcp_src & ~mask->tcp_src),
 118                             key->tcp_dst | (th->tcp_dst & ~mask->tcp_dst));
 119     }
 120 }
 121
 122 static void
 123 odp_set_udp(struct dp_packet *packet, const struct ovs_key_udp *key,
 124              const struct ovs_key_udp *mask)
 125 {
 126     struct udp_header *uh = dp_packet_l4(packet);
 127
 128     if (OVS_LIKELY(uh && dp_packet_get_udp_payload(packet))) {
 129         packet_set_udp_port(packet,
 130                             key->udp_src | (uh->udp_src & ~mask->udp_src),
 131                             key->udp_dst | (uh->udp_dst & ~mask->udp_dst));
 132     }
 133 }
 134
 135 static void
 136 odp_set_sctp(struct dp_packet *packet, const struct ovs_key_sctp *key,
 137              const struct ovs_key_sctp *mask)
 138 {
 139     struct sctp_header *sh = dp_packet_l4(packet);
 140
 141     if (OVS_LIKELY(sh && dp_packet_get_sctp_payload(packet))) {
 142         packet_set_sctp_port(packet,
 143                              key->sctp_src | (sh->sctp_src & ~mask->sctp_src),
 144                              key->sctp_dst | (sh->sctp_dst & ~mask->sctp_dst));
 145     }
 146 }
 147
 148 static void
 149 odp_set_tunnel_action(const struct nlattr *a, struct flow_tnl *tun_key)
 150 {
 151     enum odp_key_fitness fitness;
 152
 153     fitness = odp_tun_key_from_attr(a, true, tun_key);
 154     ovs_assert(fitness != ODP_FIT_ERROR);
 155 }
 156
 157 static void
 158 set_arp(struct dp_packet *packet, const struct ovs_key_arp *key,
 159         const struct ovs_key_arp *mask)
 160 {
 161     struct arp_eth_header *arp = dp_packet_l3(packet);
 162
 163     if (!mask) {
 164         arp->ar_op = key->arp_op;
 165         arp->ar_sha = key->arp_sha;
 166         put_16aligned_be32(&arp->ar_spa, key->arp_sip);
 167         arp->ar_tha = key->arp_tha;
 168         put_16aligned_be32(&arp->ar_tpa, key->arp_tip);
 169     } else {
 170         ovs_be32 ar_spa = get_16aligned_be32(&arp->ar_spa);
 171         ovs_be32 ar_tpa = get_16aligned_be32(&arp->ar_tpa);
 172
 173         arp->ar_op = key->arp_op | (arp->ar_op & ~mask->arp_op);
 174         ether_addr_copy_masked(&arp->ar_sha, key->arp_sha, mask->arp_sha);
 175         put_16aligned_be32(&arp->ar_spa,
 176                            key->arp_sip | (ar_spa & ~mask->arp_sip));
 177         ether_addr_copy_masked(&arp->ar_tha, key->arp_tha, mask->arp_tha);
 178         put_16aligned_be32(&arp->ar_tpa,
 179                            key->arp_tip | (ar_tpa & ~mask->arp_tip));
 180     }
 181 }
 182
 183 static void
 184 odp_set_nd(struct dp_packet *packet, const struct ovs_key_nd *key,
 185            const struct ovs_key_nd *mask)
 186 {
 187     const struct ovs_nd_msg *ns = dp_packet_l4(packet);
 188     const struct ovs_nd_opt *nd_opt = dp_packet_get_nd_payload(packet);
 189
 190     if (OVS_LIKELY(ns && nd_opt)) {
 191         int bytes_remain = dp_packet_l4_size(packet) - sizeof(*ns);
 192         ovs_be32 tgt_buf[4];
 193         struct eth_addr sll_buf = eth_addr_zero;
 194         struct eth_addr tll_buf = eth_addr_zero;
 195
 196         while (bytes_remain >= ND_OPT_LEN && nd_opt->nd_opt_len != 0) {
 197             if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LINKADDR
 198                 && nd_opt->nd_opt_len == 1) {
 199                 sll_buf = nd_opt->nd_opt_mac;
 200                 ether_addr_copy_masked(&sll_buf, key->nd_sll, mask->nd_sll);
 201
 202                 /* A packet can only contain one SLL or TLL option */
 203                 break;
 204             } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LINKADDR
 205                        && nd_opt->nd_opt_len == 1) {
 206                 tll_buf = nd_opt->nd_opt_mac;
 207                 ether_addr_copy_masked(&tll_buf, key->nd_tll, mask->nd_tll);
 208
 209                 /* A packet can only contain one SLL or TLL option */
 210                 break;
 211             }
 212
 213             nd_opt += nd_opt->nd_opt_len;
 214             bytes_remain -= nd_opt->nd_opt_len * ND_OPT_LEN;
 215         }
 216
 217         packet_set_nd(packet,
 218                       mask_ipv6_addr(ns->target.be32,
 219                                      key->nd_target, mask->nd_target, tgt_buf),
 220                       sll_buf,
 221                       tll_buf);
 222     }
 223 }
 224
 225 static void
 226 odp_execute_set_action(struct dp_packet *packet, const struct nlattr *a)
 227 {
 228     enum ovs_key_attr type = nl_attr_type(a);
 229     const struct ovs_key_ipv4 *ipv4_key;
 230     const struct ovs_key_ipv6 *ipv6_key;
 231     struct pkt_metadata *md = &packet->md;
 232
 233     switch (type) {
 234     case OVS_KEY_ATTR_PRIORITY:
 235         md->skb_priority = nl_attr_get_u32(a);
 236         break;
 237
 238     case OVS_KEY_ATTR_TUNNEL:
 239         odp_set_tunnel_action(a, &md->tunnel);
 240         break;
 241
 242     case OVS_KEY_ATTR_SKB_MARK:
 243         md->pkt_mark = nl_attr_get_u32(a);
 244         break;
 245
 246     case OVS_KEY_ATTR_ETHERNET:
 247         odp_eth_set_addrs(packet, nl_attr_get(a), NULL);
 248         break;
 249
 250     case OVS_KEY_ATTR_IPV4:
 251         ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4));
 252         packet_set_ipv4(packet, ipv4_key->ipv4_src,
 253                         ipv4_key->ipv4_dst, ipv4_key->ipv4_tos,
 254                         ipv4_key->ipv4_ttl);
 255         break;
 256
 257     case OVS_KEY_ATTR_IPV6:
 258         ipv6_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv6));
 259         packet_set_ipv6(packet, ipv6_key->ipv6_src, ipv6_key->ipv6_dst,
 260                         ipv6_key->ipv6_tclass, ipv6_key->ipv6_label,
 261                         ipv6_key->ipv6_hlimit);
 262         break;
 263
 264     case OVS_KEY_ATTR_TCP:
 265         if (OVS_LIKELY(dp_packet_get_tcp_payload(packet))) {
 266             const struct ovs_key_tcp *tcp_key
 267                 = nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp));
 268
 269             packet_set_tcp_port(packet, tcp_key->tcp_src,
 270                                 tcp_key->tcp_dst);
 271         }
 272         break;
 273
 274     case OVS_KEY_ATTR_UDP:
 275         if (OVS_LIKELY(dp_packet_get_udp_payload(packet))) {
 276             const struct ovs_key_udp *udp_key
 277                 = nl_attr_get_unspec(a, sizeof(struct ovs_key_udp));
 278
 279             packet_set_udp_port(packet, udp_key->udp_src,
 280                                 udp_key->udp_dst);
 281         }
 282         break;
 283
 284     case OVS_KEY_ATTR_SCTP:
 285         if (OVS_LIKELY(dp_packet_get_sctp_payload(packet))) {
 286             const struct ovs_key_sctp *sctp_key
 287                 = nl_attr_get_unspec(a, sizeof(struct ovs_key_sctp));
 288
 289             packet_set_sctp_port(packet, sctp_key->sctp_src,
 290                                  sctp_key->sctp_dst);
 291         }
 292         break;
 293
 294     case OVS_KEY_ATTR_MPLS:
 295         set_mpls_lse(packet, nl_attr_get_be32(a));
 296         break;
 297
 298     case OVS_KEY_ATTR_ARP:
 299         set_arp(packet, nl_attr_get(a), NULL);
 300         break;
 301
 302     case OVS_KEY_ATTR_ICMP:
 303     case OVS_KEY_ATTR_ICMPV6:
 304         if (OVS_LIKELY(dp_packet_get_icmp_payload(packet))) {
 305             const struct ovs_key_icmp *icmp_key
 306                 = nl_attr_get_unspec(a, sizeof(struct ovs_key_icmp));
 307
 308             packet_set_icmp(packet, icmp_key->icmp_type, icmp_key->icmp_code);
 309         }
 310         break;
 311
 312     case OVS_KEY_ATTR_ND:
 313         if (OVS_LIKELY(dp_packet_get_nd_payload(packet))) {
 314             const struct ovs_key_nd *nd_key
 315                    = nl_attr_get_unspec(a, sizeof(struct ovs_key_nd));
 316             packet_set_nd(packet, nd_key->nd_target, nd_key->nd_sll,
 317                           nd_key->nd_tll);
 318         }
 319         break;
 320
 321     case OVS_KEY_ATTR_DP_HASH:
 322         md->dp_hash = nl_attr_get_u32(a);
 323         break;
 324
 325     case OVS_KEY_ATTR_RECIRC_ID:
 326         md->recirc_id = nl_attr_get_u32(a);
 327         break;
 328
 329     case OVS_KEY_ATTR_UNSPEC:
 330     case OVS_KEY_ATTR_ENCAP:
 331     case OVS_KEY_ATTR_ETHERTYPE:
 332     case OVS_KEY_ATTR_IN_PORT:
 333     case OVS_KEY_ATTR_VLAN:
 334     case OVS_KEY_ATTR_TCP_FLAGS:
 335     case OVS_KEY_ATTR_CT_STATE:
 336     case OVS_KEY_ATTR_CT_ZONE:
 337     case OVS_KEY_ATTR_CT_MARK:
 338     case OVS_KEY_ATTR_CT_LABELS:
 339     case __OVS_KEY_ATTR_MAX:
 340     default:
 341         OVS_NOT_REACHED();
 342     }
 343 }
 344
 345 #define get_mask(a, type) ((const type *)(const void *)(a + 1) + 1)
 346
 347 static void
 348 odp_execute_masked_set_action(struct dp_packet *packet,
 349                               const struct nlattr *a)
 350 {
 351     struct pkt_metadata *md = &packet->md;
 352     enum ovs_key_attr type = nl_attr_type(a);
 353     struct mpls_hdr *mh;
 354
 355     switch (type) {
 356     case OVS_KEY_ATTR_PRIORITY:
 357         md->skb_priority = nl_attr_get_u32(a)
 358             | (md->skb_priority & ~*get_mask(a, uint32_t));
 359         break;
 360
 361     case OVS_KEY_ATTR_SKB_MARK:
 362         md->pkt_mark = nl_attr_get_u32(a)
 363             | (md->pkt_mark & ~*get_mask(a, uint32_t));
 364         break;
 365
 366     case OVS_KEY_ATTR_ETHERNET:
 367         odp_eth_set_addrs(packet, nl_attr_get(a),
 368                           get_mask(a, struct ovs_key_ethernet));
 369         break;
 370
 371     case OVS_KEY_ATTR_IPV4:
 372         odp_set_ipv4(packet, nl_attr_get(a),
 373                      get_mask(a, struct ovs_key_ipv4));
 374         break;
 375
 376     case OVS_KEY_ATTR_IPV6:
 377         odp_set_ipv6(packet, nl_attr_get(a),
 378                      get_mask(a, struct ovs_key_ipv6));
 379         break;
 380
 381     case OVS_KEY_ATTR_TCP:
 382         odp_set_tcp(packet, nl_attr_get(a),
 383                     get_mask(a, struct ovs_key_tcp));
 384         break;
 385
 386     case OVS_KEY_ATTR_UDP:
 387         odp_set_udp(packet, nl_attr_get(a),
 388                     get_mask(a, struct ovs_key_udp));
 389         break;
 390
 391     case OVS_KEY_ATTR_SCTP:
 392         odp_set_sctp(packet, nl_attr_get(a),
 393                      get_mask(a, struct ovs_key_sctp));
 394         break;
 395
 396     case OVS_KEY_ATTR_MPLS:
 397         mh = dp_packet_l2_5(packet);
 398         if (mh) {
 399             put_16aligned_be32(&mh->mpls_lse, nl_attr_get_be32(a)
 400                                | (get_16aligned_be32(&mh->mpls_lse)
 401                                   & ~*get_mask(a, ovs_be32)));
 402         }
 403         break;
 404
 405     case OVS_KEY_ATTR_ARP:
 406         set_arp(packet, nl_attr_get(a),
 407                 get_mask(a, struct ovs_key_arp));
 408         break;
 409
 410     case OVS_KEY_ATTR_ND:
 411         odp_set_nd(packet, nl_attr_get(a),
 412                    get_mask(a, struct ovs_key_nd));
 413         break;
 414
 415     case OVS_KEY_ATTR_DP_HASH:
 416         md->dp_hash = nl_attr_get_u32(a)
 417             | (md->dp_hash & ~*get_mask(a, uint32_t));
 418         break;
 419
 420     case OVS_KEY_ATTR_RECIRC_ID:
 421         md->recirc_id = nl_attr_get_u32(a)
 422             | (md->recirc_id & ~*get_mask(a, uint32_t));
 423         break;
 424
 425     case OVS_KEY_ATTR_TUNNEL:    /* Masked data not supported for tunnel. */
 426     case OVS_KEY_ATTR_UNSPEC:
 427     case OVS_KEY_ATTR_CT_STATE:
 428     case OVS_KEY_ATTR_CT_ZONE:
 429     case OVS_KEY_ATTR_CT_MARK:
 430     case OVS_KEY_ATTR_CT_LABELS:
 431     case OVS_KEY_ATTR_ENCAP:
 432     case OVS_KEY_ATTR_ETHERTYPE:
 433     case OVS_KEY_ATTR_IN_PORT:
 434     case OVS_KEY_ATTR_VLAN:
 435     case OVS_KEY_ATTR_ICMP:
 436     case OVS_KEY_ATTR_ICMPV6:
 437     case OVS_KEY_ATTR_TCP_FLAGS:
 438     case __OVS_KEY_ATTR_MAX:
 439     default:
 440         OVS_NOT_REACHED();
 441     }
 442 }
 443
 444 static void
 445 odp_execute_sample(void *dp, struct dp_packet *packet, bool steal,
 446                    const struct nlattr *action,
 447                    odp_execute_cb dp_execute_action)
 448 {
 449     const struct nlattr *subactions = NULL;
 450     const struct nlattr *a;
 451     size_t left;
 452
 453     NL_NESTED_FOR_EACH_UNSAFE (a, left, action) {
 454         int type = nl_attr_type(a);
 455
 456         switch ((enum ovs_sample_attr) type) {
 457         case OVS_SAMPLE_ATTR_PROBABILITY:
 458             if (random_uint32() >= nl_attr_get_u32(a)) {
 459                 if (steal) {
 460                     dp_packet_delete(packet);
 461                 }
 462                 return;
 463             }
 464             break;
 465
 466         case OVS_SAMPLE_ATTR_ACTIONS:
 467             subactions = a;
 468             break;
 469
 470         case OVS_SAMPLE_ATTR_UNSPEC:
 471         case __OVS_SAMPLE_ATTR_MAX:
 472         default:
 473             OVS_NOT_REACHED();
 474         }
 475     }
 476
 477     odp_execute_actions(dp, &packet, 1, steal, nl_attr_get(subactions),
 478                         nl_attr_get_size(subactions), dp_execute_action);
 479 }
 480
 481 static bool
 482 requires_datapath_assistance(const struct nlattr *a)
 483 {
 484     enum ovs_action_attr type = nl_attr_type(a);
 485
 486     switch (type) {
 487         /* These only make sense in the context of a datapath. */
 488     case OVS_ACTION_ATTR_OUTPUT:
 489     case OVS_ACTION_ATTR_TUNNEL_PUSH:
 490     case OVS_ACTION_ATTR_TUNNEL_POP:
 491     case OVS_ACTION_ATTR_USERSPACE:
 492     case OVS_ACTION_ATTR_RECIRC:
 493     case OVS_ACTION_ATTR_CT:
 494         return true;
 495
 496     case OVS_ACTION_ATTR_SET:
 497     case OVS_ACTION_ATTR_SET_MASKED:
 498     case OVS_ACTION_ATTR_PUSH_VLAN:
 499     case OVS_ACTION_ATTR_POP_VLAN:
 500     case OVS_ACTION_ATTR_SAMPLE:
 501     case OVS_ACTION_ATTR_HASH:
 502     case OVS_ACTION_ATTR_PUSH_MPLS:
 503     case OVS_ACTION_ATTR_POP_MPLS:
 504         return false;
 505
 506     case OVS_ACTION_ATTR_UNSPEC:
 507     case __OVS_ACTION_ATTR_MAX:
 508         OVS_NOT_REACHED();
 509     }
 510
 511     return false;
 512 }
 513
 514 void
 515 odp_execute_actions(void *dp, struct dp_packet **packets, int cnt, bool steal,
 516                     const struct nlattr *actions, size_t actions_len,
 517                     odp_execute_cb dp_execute_action)
 518 {
 519     const struct nlattr *a;
 520     unsigned int left;
 521     int i;
 522
 523     NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
 524         int type = nl_attr_type(a);
 525         bool last_action = (left <= NLA_ALIGN(a->nla_len));
 526
 527         if (requires_datapath_assistance(a)) {
 528             if (dp_execute_action) {
 529                 /* Allow 'dp_execute_action' to steal the packet data if we do
 530                  * not need it any more. */
 531                 bool may_steal = steal && last_action;
 532
 533                 dp_execute_action(dp, packets, cnt, a, may_steal);
 534
 535                 if (last_action) {
 536                     /* We do not need to free the packets. dp_execute_actions()
 537                      * has stolen them */
 538                     return;
 539                 }
 540             }
 541             continue;
 542         }
 543
 544         switch ((enum ovs_action_attr) type) {
 545         case OVS_ACTION_ATTR_HASH: {
 546             const struct ovs_action_hash *hash_act = nl_attr_get(a);
 547
 548             /* Calculate a hash value directly.  This might not match the
 549              * value computed by the datapath, but it is much less expensive,
 550              * and the current use case (bonding) does not require a strict
 551              * match to work properly. */
 552             if (hash_act->hash_alg == OVS_HASH_ALG_L4) {
 553                 struct flow flow;
 554                 uint32_t hash;
 555
 556                 for (i = 0; i < cnt; i++) {
 557                     flow_extract(packets[i], &flow);
 558                     hash = flow_hash_5tuple(&flow, hash_act->hash_basis);
 559
 560                     packets[i]->md.dp_hash = hash;
 561                 }
 562             } else {
 563                 /* Assert on unknown hash algorithm.  */
 564                 OVS_NOT_REACHED();
 565             }
 566             break;
 567         }
 568
 569         case OVS_ACTION_ATTR_PUSH_VLAN: {
 570             const struct ovs_action_push_vlan *vlan = nl_attr_get(a);
 571
 572             for (i = 0; i < cnt; i++) {
 573                 eth_push_vlan(packets[i], vlan->vlan_tpid, vlan->vlan_tci);
 574             }
 575             break;
 576         }
 577
 578         case OVS_ACTION_ATTR_POP_VLAN:
 579             for (i = 0; i < cnt; i++) {
 580                 eth_pop_vlan(packets[i]);
 581             }
 582             break;
 583
 584         case OVS_ACTION_ATTR_PUSH_MPLS: {
 585             const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
 586
 587             for (i = 0; i < cnt; i++) {
 588                 push_mpls(packets[i], mpls->mpls_ethertype, mpls->mpls_lse);
 589             }
 590             break;
 591          }
 592
 593         case OVS_ACTION_ATTR_POP_MPLS:
 594             for (i = 0; i < cnt; i++) {
 595                 pop_mpls(packets[i], nl_attr_get_be16(a));
 596             }
 597             break;
 598
 599         case OVS_ACTION_ATTR_SET:
 600             for (i = 0; i < cnt; i++) {
 601                 odp_execute_set_action(packets[i], nl_attr_get(a));
 602             }
 603             break;
 604
 605         case OVS_ACTION_ATTR_SET_MASKED:
 606             for (i = 0; i < cnt; i++) {
 607                 odp_execute_masked_set_action(packets[i], nl_attr_get(a));
 608             }
 609             break;
 610
 611         case OVS_ACTION_ATTR_SAMPLE:
 612             for (i = 0; i < cnt; i++) {
 613                 odp_execute_sample(dp, packets[i], steal && last_action, a,
 614                                    dp_execute_action);
 615             }
 616
 617             if (last_action) {
 618                 /* We do not need to free the packets. odp_execute_sample() has
 619                  * stolen them*/
 620                 return;
 621             }
 622             break;
 623
 624         case OVS_ACTION_ATTR_OUTPUT:
 625         case OVS_ACTION_ATTR_TUNNEL_PUSH:
 626         case OVS_ACTION_ATTR_TUNNEL_POP:
 627         case OVS_ACTION_ATTR_USERSPACE:
 628         case OVS_ACTION_ATTR_RECIRC:
 629         case OVS_ACTION_ATTR_CT:
 630         case OVS_ACTION_ATTR_UNSPEC:
 631         case __OVS_ACTION_ATTR_MAX:
 632             OVS_NOT_REACHED();
 633         }
 634     }
 635
 636     if (steal) {
 637         for (i = 0; i < cnt; i++) {
 638             dp_packet_delete(packets[i]);
 639         }
 640     }
 641 }