net/openvswitch/flow_netlink.c

   1 /*
   2  * Copyright (c) 2007-2014 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/geneve.h>
  46 #include <net/ip.h>
  47 #include <net/ipv6.h>
  48 #include <net/ndisc.h>
  49 #include <net/mpls.h>
  50 #include <net/vxlan.h>
  51
  52 #include "flow_netlink.h"
  53
  54 struct ovs_len_tbl {
  55         int len;
  56         const struct ovs_len_tbl *next;
  57 };
  58
  59 #define OVS_ATTR_NESTED -1
  60 #define OVS_ATTR_VARIABLE -2
  61
  62 static void update_range(struct sw_flow_match *match,
  63                          size_t offset, size_t size, bool is_mask)
  64 {
  65         struct sw_flow_key_range *range;
  66         size_t start = rounddown(offset, sizeof(long));
  67         size_t end = roundup(offset + size, sizeof(long));
  68
  69         if (!is_mask)
  70                 range = &match->range;
  71         else
  72                 range = &match->mask->range;
  73
  74         if (range->start == range->end) {
  75                 range->start = start;
  76                 range->end = end;
  77                 return;
  78         }
  79
  80         if (range->start > start)
  81                 range->start = start;
  82
  83         if (range->end < end)
  84                 range->end = end;
  85 }
  86
  87 #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \
  88         do { \
  89                 update_range(match, offsetof(struct sw_flow_key, field),    \
  90                              sizeof((match)->key->field), is_mask);         \
  91                 if (is_mask)                                                \
  92                         (match)->mask->key.field = value;                   \
  93                 else                                                        \
  94                         (match)->key->field = value;                        \
  95         } while (0)
  96
  97 #define SW_FLOW_KEY_MEMCPY_OFFSET(match, offset, value_p, len, is_mask)     \
  98         do {                                                                \
  99                 update_range(match, offset, len, is_mask);                  \
 100                 if (is_mask)                                                \
 101                         memcpy((u8 *)&(match)->mask->key + offset, value_p, \
 102                                len);                                       \
 103                 else                                                        \
 104                         memcpy((u8 *)(match)->key + offset, value_p, len);  \
 105         } while (0)
 106
 107 #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask)               \
 108         SW_FLOW_KEY_MEMCPY_OFFSET(match, offsetof(struct sw_flow_key, field), \
 109                                   value_p, len, is_mask)
 110
 111 #define SW_FLOW_KEY_MEMSET_FIELD(match, field, value, is_mask)              \
 112         do {                                                                \
 113                 update_range(match, offsetof(struct sw_flow_key, field),    \
 114                              sizeof((match)->key->field), is_mask);         \
 115                 if (is_mask)                                                \
 116                         memset((u8 *)&(match)->mask->key.field, value,      \
 117                                sizeof((match)->mask->key.field));           \
 118                 else                                                        \
 119                         memset((u8 *)&(match)->key->field, value,           \
 120                                sizeof((match)->key->field));                \
 121         } while (0)
 122
 123 static bool match_validate(const struct sw_flow_match *match,
 124                            u64 key_attrs, u64 mask_attrs, bool log)
 125 {
 126         u64 key_expected = 0;
 127         u64 mask_allowed = key_attrs;  /* At most allow all key attributes */
 128
 129         /* The following mask attributes allowed only if they
 130          * pass the validation tests. */
 131         mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4)
 132                         | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)
 133                         | (1 << OVS_KEY_ATTR_IPV6)
 134                         | (1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)
 135                         | (1 << OVS_KEY_ATTR_TCP)
 136                         | (1 << OVS_KEY_ATTR_TCP_FLAGS)
 137                         | (1 << OVS_KEY_ATTR_UDP)
 138                         | (1 << OVS_KEY_ATTR_SCTP)
 139                         | (1 << OVS_KEY_ATTR_ICMP)
 140                         | (1 << OVS_KEY_ATTR_ICMPV6)
 141                         | (1 << OVS_KEY_ATTR_ARP)
 142                         | (1 << OVS_KEY_ATTR_ND)
 143                         | (1 << OVS_KEY_ATTR_MPLS));
 144
 145         /* Always allowed mask fields. */
 146         mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL)
 147                        | (1 << OVS_KEY_ATTR_IN_PORT)
 148                        | (1 << OVS_KEY_ATTR_ETHERTYPE));
 149
 150         /* Check key attributes. */
 151         if (match->key->eth.type == htons(ETH_P_ARP)
 152                         || match->key->eth.type == htons(ETH_P_RARP)) {
 153                 key_expected |= 1 << OVS_KEY_ATTR_ARP;
 154                 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
 155                         mask_allowed |= 1 << OVS_KEY_ATTR_ARP;
 156         }
 157
 158         if (eth_p_mpls(match->key->eth.type)) {
 159                 key_expected |= 1 << OVS_KEY_ATTR_MPLS;
 160                 if (match->mask && (match->mask->key.eth.type == htons(0xffff)))
 161                         mask_allowed |= 1 << OVS_KEY_ATTR_MPLS;
 162         }
 163
 164         if (match->key->eth.type == htons(ETH_P_IP)) {
 165                 key_expected |= 1 << OVS_KEY_ATTR_IPV4;
 166                 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
 167                         mask_allowed |= 1 << OVS_KEY_ATTR_IPV4;
 168                         mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4;
 169                 }
 170
 171                 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
 172                         if (match->key->ip.proto == IPPROTO_UDP) {
 173                                 key_expected |= 1 << OVS_KEY_ATTR_UDP;
 174                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 175                                         mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
 176                         }
 177
 178                         if (match->key->ip.proto == IPPROTO_SCTP) {
 179                                 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
 180                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 181                                         mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
 182                         }
 183
 184                         if (match->key->ip.proto == IPPROTO_TCP) {
 185                                 key_expected |= 1 << OVS_KEY_ATTR_TCP;
 186                                 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
 187                                 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
 188                                         mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
 189                                         mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
 190                                 }
 191                         }
 192
 193                         if (match->key->ip.proto == IPPROTO_ICMP) {
 194                                 key_expected |= 1 << OVS_KEY_ATTR_ICMP;
 195                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 196                                         mask_allowed |= 1 << OVS_KEY_ATTR_ICMP;
 197                         }
 198                 }
 199         }
 200
 201         if (match->key->eth.type == htons(ETH_P_IPV6)) {
 202                 key_expected |= 1 << OVS_KEY_ATTR_IPV6;
 203                 if (match->mask && match->mask->key.eth.type == htons(0xffff)) {
 204                         mask_allowed |= 1 << OVS_KEY_ATTR_IPV6;
 205                         mask_allowed |= 1 << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6;
 206                 }
 207
 208                 if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) {
 209                         if (match->key->ip.proto == IPPROTO_UDP) {
 210                                 key_expected |= 1 << OVS_KEY_ATTR_UDP;
 211                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 212                                         mask_allowed |= 1 << OVS_KEY_ATTR_UDP;
 213                         }
 214
 215                         if (match->key->ip.proto == IPPROTO_SCTP) {
 216                                 key_expected |= 1 << OVS_KEY_ATTR_SCTP;
 217                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 218                                         mask_allowed |= 1 << OVS_KEY_ATTR_SCTP;
 219                         }
 220
 221                         if (match->key->ip.proto == IPPROTO_TCP) {
 222                                 key_expected |= 1 << OVS_KEY_ATTR_TCP;
 223                                 key_expected |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
 224                                 if (match->mask && (match->mask->key.ip.proto == 0xff)) {
 225                                         mask_allowed |= 1 << OVS_KEY_ATTR_TCP;
 226                                         mask_allowed |= 1 << OVS_KEY_ATTR_TCP_FLAGS;
 227                                 }
 228                         }
 229
 230                         if (match->key->ip.proto == IPPROTO_ICMPV6) {
 231                                 key_expected |= 1 << OVS_KEY_ATTR_ICMPV6;
 232                                 if (match->mask && (match->mask->key.ip.proto == 0xff))
 233                                         mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6;
 234
 235                                 if (match->key->tp.src ==
 236                                                 htons(NDISC_NEIGHBOUR_SOLICITATION) ||
 237                                     match->key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) {
 238                                         key_expected |= 1 << OVS_KEY_ATTR_ND;
 239                                         /* Original direction conntrack tuple
 240                                          * uses the same space as the ND fields
 241                                          * in the key, so both are not allowed
 242                                          * at the same time.
 243                                          */
 244                                         mask_allowed &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
 245                                         if (match->mask && (match->mask->key.tp.src == htons(0xff)))
 246                                                 mask_allowed |= 1 << OVS_KEY_ATTR_ND;
 247                                 }
 248                         }
 249                 }
 250         }
 251
 252         if ((key_attrs & key_expected) != key_expected) {
 253                 /* Key attributes check failed. */
 254                 OVS_NLERR(log, "Missing key (keys=%llx, expected=%llx)",
 255                           (unsigned long long)key_attrs,
 256                           (unsigned long long)key_expected);
 257                 return false;
 258         }
 259
 260         if ((mask_attrs & mask_allowed) != mask_attrs) {
 261                 /* Mask attributes check failed. */
 262                 OVS_NLERR(log, "Unexpected mask (mask=%llx, allowed=%llx)",
 263                           (unsigned long long)mask_attrs,
 264                           (unsigned long long)mask_allowed);
 265                 return false;
 266         }
 267
 268         return true;
 269 }
 270
 271 size_t ovs_tun_key_attr_size(void)
 272 {
 273         /* Whenever adding new OVS_TUNNEL_KEY_ FIELDS, we should consider
 274          * updating this function.
 275          */
 276         return    nla_total_size_64bit(8) /* OVS_TUNNEL_KEY_ATTR_ID */
 277                 + nla_total_size(16)   /* OVS_TUNNEL_KEY_ATTR_IPV[46]_SRC */
 278                 + nla_total_size(16)   /* OVS_TUNNEL_KEY_ATTR_IPV[46]_DST */
 279                 + nla_total_size(1)    /* OVS_TUNNEL_KEY_ATTR_TOS */
 280                 + nla_total_size(1)    /* OVS_TUNNEL_KEY_ATTR_TTL */
 281                 + nla_total_size(0)    /* OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT */
 282                 + nla_total_size(0)    /* OVS_TUNNEL_KEY_ATTR_CSUM */
 283                 + nla_total_size(0)    /* OVS_TUNNEL_KEY_ATTR_OAM */
 284                 + nla_total_size(256)  /* OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS */
 285                 /* OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS is mutually exclusive with
 286                  * OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS and covered by it.
 287                  */
 288                 + nla_total_size(2)    /* OVS_TUNNEL_KEY_ATTR_TP_SRC */
 289                 + nla_total_size(2);   /* OVS_TUNNEL_KEY_ATTR_TP_DST */
 290 }
 291
 292 size_t ovs_key_attr_size(void)
 293 {
 294         /* Whenever adding new OVS_KEY_ FIELDS, we should consider
 295          * updating this function.
 296          */
 297         BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 28);
 298
 299         return    nla_total_size(4)   /* OVS_KEY_ATTR_PRIORITY */
 300                 + nla_total_size(0)   /* OVS_KEY_ATTR_TUNNEL */
 301                   + ovs_tun_key_attr_size()
 302                 + nla_total_size(4)   /* OVS_KEY_ATTR_IN_PORT */
 303                 + nla_total_size(4)   /* OVS_KEY_ATTR_SKB_MARK */
 304                 + nla_total_size(4)   /* OVS_KEY_ATTR_DP_HASH */
 305                 + nla_total_size(4)   /* OVS_KEY_ATTR_RECIRC_ID */
 306                 + nla_total_size(4)   /* OVS_KEY_ATTR_CT_STATE */
 307                 + nla_total_size(2)   /* OVS_KEY_ATTR_CT_ZONE */
 308                 + nla_total_size(4)   /* OVS_KEY_ATTR_CT_MARK */
 309                 + nla_total_size(16)  /* OVS_KEY_ATTR_CT_LABELS */
 310                 + nla_total_size(40)  /* OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6 */
 311                 + nla_total_size(12)  /* OVS_KEY_ATTR_ETHERNET */
 312                 + nla_total_size(2)   /* OVS_KEY_ATTR_ETHERTYPE */
 313                 + nla_total_size(4)   /* OVS_KEY_ATTR_VLAN */
 314                 + nla_total_size(0)   /* OVS_KEY_ATTR_ENCAP */
 315                 + nla_total_size(2)   /* OVS_KEY_ATTR_ETHERTYPE */
 316                 + nla_total_size(40)  /* OVS_KEY_ATTR_IPV6 */
 317                 + nla_total_size(2)   /* OVS_KEY_ATTR_ICMPV6 */
 318                 + nla_total_size(28); /* OVS_KEY_ATTR_ND */
 319 }
 320
 321 static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
 322         [OVS_VXLAN_EXT_GBP]         = { .len = sizeof(u32) },
 323 };
 324
 325 static const struct ovs_len_tbl ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = {
 326         [OVS_TUNNEL_KEY_ATTR_ID]            = { .len = sizeof(u64) },
 327         [OVS_TUNNEL_KEY_ATTR_IPV4_SRC]      = { .len = sizeof(u32) },
 328         [OVS_TUNNEL_KEY_ATTR_IPV4_DST]      = { .len = sizeof(u32) },
 329         [OVS_TUNNEL_KEY_ATTR_TOS]           = { .len = 1 },
 330         [OVS_TUNNEL_KEY_ATTR_TTL]           = { .len = 1 },
 331         [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = { .len = 0 },
 332         [OVS_TUNNEL_KEY_ATTR_CSUM]          = { .len = 0 },
 333         [OVS_TUNNEL_KEY_ATTR_TP_SRC]        = { .len = sizeof(u16) },
 334         [OVS_TUNNEL_KEY_ATTR_TP_DST]        = { .len = sizeof(u16) },
 335         [OVS_TUNNEL_KEY_ATTR_OAM]           = { .len = 0 },
 336         [OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS]   = { .len = OVS_ATTR_VARIABLE },
 337         [OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS]    = { .len = OVS_ATTR_NESTED,
 338                                                 .next = ovs_vxlan_ext_key_lens },
 339         [OVS_TUNNEL_KEY_ATTR_IPV6_SRC]      = { .len = sizeof(struct in6_addr) },
 340         [OVS_TUNNEL_KEY_ATTR_IPV6_DST]      = { .len = sizeof(struct in6_addr) },
 341 };
 342
 343 /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute.  */
 344 static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
 345         [OVS_KEY_ATTR_ENCAP]     = { .len = OVS_ATTR_NESTED },
 346         [OVS_KEY_ATTR_PRIORITY]  = { .len = sizeof(u32) },
 347         [OVS_KEY_ATTR_IN_PORT]   = { .len = sizeof(u32) },
 348         [OVS_KEY_ATTR_SKB_MARK]  = { .len = sizeof(u32) },
 349         [OVS_KEY_ATTR_ETHERNET]  = { .len = sizeof(struct ovs_key_ethernet) },
 350         [OVS_KEY_ATTR_VLAN]      = { .len = sizeof(__be16) },
 351         [OVS_KEY_ATTR_ETHERTYPE] = { .len = sizeof(__be16) },
 352         [OVS_KEY_ATTR_IPV4]      = { .len = sizeof(struct ovs_key_ipv4) },
 353         [OVS_KEY_ATTR_IPV6]      = { .len = sizeof(struct ovs_key_ipv6) },
 354         [OVS_KEY_ATTR_TCP]       = { .len = sizeof(struct ovs_key_tcp) },
 355         [OVS_KEY_ATTR_TCP_FLAGS] = { .len = sizeof(__be16) },
 356         [OVS_KEY_ATTR_UDP]       = { .len = sizeof(struct ovs_key_udp) },
 357         [OVS_KEY_ATTR_SCTP]      = { .len = sizeof(struct ovs_key_sctp) },
 358         [OVS_KEY_ATTR_ICMP]      = { .len = sizeof(struct ovs_key_icmp) },
 359         [OVS_KEY_ATTR_ICMPV6]    = { .len = sizeof(struct ovs_key_icmpv6) },
 360         [OVS_KEY_ATTR_ARP]       = { .len = sizeof(struct ovs_key_arp) },
 361         [OVS_KEY_ATTR_ND]        = { .len = sizeof(struct ovs_key_nd) },
 362         [OVS_KEY_ATTR_RECIRC_ID] = { .len = sizeof(u32) },
 363         [OVS_KEY_ATTR_DP_HASH]   = { .len = sizeof(u32) },
 364         [OVS_KEY_ATTR_TUNNEL]    = { .len = OVS_ATTR_NESTED,
 365                                      .next = ovs_tunnel_key_lens, },
 366         [OVS_KEY_ATTR_MPLS]      = { .len = sizeof(struct ovs_key_mpls) },
 367         [OVS_KEY_ATTR_CT_STATE]  = { .len = sizeof(u32) },
 368         [OVS_KEY_ATTR_CT_ZONE]   = { .len = sizeof(u16) },
 369         [OVS_KEY_ATTR_CT_MARK]   = { .len = sizeof(u32) },
 370         [OVS_KEY_ATTR_CT_LABELS] = { .len = sizeof(struct ovs_key_ct_labels) },
 371         [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4] = {
 372                 .len = sizeof(struct ovs_key_ct_tuple_ipv4) },
 373         [OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6] = {
 374                 .len = sizeof(struct ovs_key_ct_tuple_ipv6) },
 375 };
 376
 377 static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
 378 {
 379         return expected_len == attr_len ||
 380                expected_len == OVS_ATTR_NESTED ||
 381                expected_len == OVS_ATTR_VARIABLE;
 382 }
 383
 384 static bool is_all_zero(const u8 *fp, size_t size)
 385 {
 386         int i;
 387
 388         if (!fp)
 389                 return false;
 390
 391         for (i = 0; i < size; i++)
 392                 if (fp[i])
 393                         return false;
 394
 395         return true;
 396 }
 397
 398 static int __parse_flow_nlattrs(const struct nlattr *attr,
 399                                 const struct nlattr *a[],
 400                                 u64 *attrsp, bool log, bool nz)
 401 {
 402         const struct nlattr *nla;
 403         u64 attrs;
 404         int rem;
 405
 406         attrs = *attrsp;
 407         nla_for_each_nested(nla, attr, rem) {
 408                 u16 type = nla_type(nla);
 409                 int expected_len;
 410
 411                 if (type > OVS_KEY_ATTR_MAX) {
 412                         OVS_NLERR(log, "Key type %d is out of range max %d",
 413                                   type, OVS_KEY_ATTR_MAX);
 414                         return -EINVAL;
 415                 }
 416
 417                 if (attrs & (1 << type)) {
 418                         OVS_NLERR(log, "Duplicate key (type %d).", type);
 419                         return -EINVAL;
 420                 }
 421
 422                 expected_len = ovs_key_lens[type].len;
 423                 if (!check_attr_len(nla_len(nla), expected_len)) {
 424                         OVS_NLERR(log, "Key %d has unexpected len %d expected %d",
 425                                   type, nla_len(nla), expected_len);
 426                         return -EINVAL;
 427                 }
 428
 429                 if (!nz || !is_all_zero(nla_data(nla), expected_len)) {
 430                         attrs |= 1 << type;
 431                         a[type] = nla;
 432                 }
 433         }
 434         if (rem) {
 435                 OVS_NLERR(log, "Message has %d unknown bytes.", rem);
 436                 return -EINVAL;
 437         }
 438
 439         *attrsp = attrs;
 440         return 0;
 441 }
 442
 443 static int parse_flow_mask_nlattrs(const struct nlattr *attr,
 444                                    const struct nlattr *a[], u64 *attrsp,
 445                                    bool log)
 446 {
 447         return __parse_flow_nlattrs(attr, a, attrsp, log, true);
 448 }
 449
 450 int parse_flow_nlattrs(const struct nlattr *attr, const struct nlattr *a[],
 451                        u64 *attrsp, bool log)
 452 {
 453         return __parse_flow_nlattrs(attr, a, attrsp, log, false);
 454 }
 455
 456 static int genev_tun_opt_from_nlattr(const struct nlattr *a,
 457                                      struct sw_flow_match *match, bool is_mask,
 458                                      bool log)
 459 {
 460         unsigned long opt_key_offset;
 461
 462         if (nla_len(a) > sizeof(match->key->tun_opts)) {
 463                 OVS_NLERR(log, "Geneve option length err (len %d, max %zu).",
 464                           nla_len(a), sizeof(match->key->tun_opts));
 465                 return -EINVAL;
 466         }
 467
 468         if (nla_len(a) % 4 != 0) {
 469                 OVS_NLERR(log, "Geneve opt len %d is not a multiple of 4.",
 470                           nla_len(a));
 471                 return -EINVAL;
 472         }
 473
 474         /* We need to record the length of the options passed
 475          * down, otherwise packets with the same format but
 476          * additional options will be silently matched.
 477          */
 478         if (!is_mask) {
 479                 SW_FLOW_KEY_PUT(match, tun_opts_len, nla_len(a),
 480                                 false);
 481         } else {
 482                 /* This is somewhat unusual because it looks at
 483                  * both the key and mask while parsing the
 484                  * attributes (and by extension assumes the key
 485                  * is parsed first). Normally, we would verify
 486                  * that each is the correct length and that the
 487                  * attributes line up in the validate function.
 488                  * However, that is difficult because this is
 489                  * variable length and we won't have the
 490                  * information later.
 491                  */
 492                 if (match->key->tun_opts_len != nla_len(a)) {
 493                         OVS_NLERR(log, "Geneve option len %d != mask len %d",
 494                                   match->key->tun_opts_len, nla_len(a));
 495                         return -EINVAL;
 496                 }
 497
 498                 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
 499         }
 500
 501         opt_key_offset = TUN_METADATA_OFFSET(nla_len(a));
 502         SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, nla_data(a),
 503                                   nla_len(a), is_mask);
 504         return 0;
 505 }
 506
 507 static int vxlan_tun_opt_from_nlattr(const struct nlattr *attr,
 508                                      struct sw_flow_match *match, bool is_mask,
 509                                      bool log)
 510 {
 511         struct nlattr *a;
 512         int rem;
 513         unsigned long opt_key_offset;
 514         struct vxlan_metadata opts;
 515
 516         BUILD_BUG_ON(sizeof(opts) > sizeof(match->key->tun_opts));
 517
 518         memset(&opts, 0, sizeof(opts));
 519         nla_for_each_nested(a, attr, rem) {
 520                 int type = nla_type(a);
 521
 522                 if (type > OVS_VXLAN_EXT_MAX) {
 523                         OVS_NLERR(log, "VXLAN extension %d out of range max %d",
 524                                   type, OVS_VXLAN_EXT_MAX);
 525                         return -EINVAL;
 526                 }
 527
 528                 if (!check_attr_len(nla_len(a),
 529                                     ovs_vxlan_ext_key_lens[type].len)) {
 530                         OVS_NLERR(log, "VXLAN extension %d has unexpected len %d expected %d",
 531                                   type, nla_len(a),
 532                                   ovs_vxlan_ext_key_lens[type].len);
 533                         return -EINVAL;
 534                 }
 535
 536                 switch (type) {
 537                 case OVS_VXLAN_EXT_GBP:
 538                         opts.gbp = nla_get_u32(a);
 539                         break;
 540                 default:
 541                         OVS_NLERR(log, "Unknown VXLAN extension attribute %d",
 542                                   type);
 543                         return -EINVAL;
 544                 }
 545         }
 546         if (rem) {
 547                 OVS_NLERR(log, "VXLAN extension message has %d unknown bytes.",
 548                           rem);
 549                 return -EINVAL;
 550         }
 551
 552         if (!is_mask)
 553                 SW_FLOW_KEY_PUT(match, tun_opts_len, sizeof(opts), false);
 554         else
 555                 SW_FLOW_KEY_PUT(match, tun_opts_len, 0xff, true);
 556
 557         opt_key_offset = TUN_METADATA_OFFSET(sizeof(opts));
 558         SW_FLOW_KEY_MEMCPY_OFFSET(match, opt_key_offset, &opts, sizeof(opts),
 559                                   is_mask);
 560         return 0;
 561 }
 562
 563 static int ip_tun_from_nlattr(const struct nlattr *attr,
 564                               struct sw_flow_match *match, bool is_mask,
 565                               bool log)
 566 {
 567         bool ttl = false, ipv4 = false, ipv6 = false;
 568         __be16 tun_flags = 0;
 569         int opts_type = 0;
 570         struct nlattr *a;
 571         int rem;
 572
 573         nla_for_each_nested(a, attr, rem) {
 574                 int type = nla_type(a);
 575                 int err;
 576
 577                 if (type > OVS_TUNNEL_KEY_ATTR_MAX) {
 578                         OVS_NLERR(log, "Tunnel attr %d out of range max %d",
 579                                   type, OVS_TUNNEL_KEY_ATTR_MAX);
 580                         return -EINVAL;
 581                 }
 582
 583                 if (!check_attr_len(nla_len(a),
 584                                     ovs_tunnel_key_lens[type].len)) {
 585                         OVS_NLERR(log, "Tunnel attr %d has unexpected len %d expected %d",
 586                                   type, nla_len(a), ovs_tunnel_key_lens[type].len);
 587                         return -EINVAL;
 588                 }
 589
 590                 switch (type) {
 591                 case OVS_TUNNEL_KEY_ATTR_ID:
 592                         SW_FLOW_KEY_PUT(match, tun_key.tun_id,
 593                                         nla_get_be64(a), is_mask);
 594                         tun_flags |= TUNNEL_KEY;
 595                         break;
 596                 case OVS_TUNNEL_KEY_ATTR_IPV4_SRC:
 597                         SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.src,
 598                                         nla_get_in_addr(a), is_mask);
 599                         ipv4 = true;
 600                         break;
 601                 case OVS_TUNNEL_KEY_ATTR_IPV4_DST:
 602                         SW_FLOW_KEY_PUT(match, tun_key.u.ipv4.dst,
 603                                         nla_get_in_addr(a), is_mask);
 604                         ipv4 = true;
 605                         break;
 606                 case OVS_TUNNEL_KEY_ATTR_IPV6_SRC:
 607                         SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.src,
 608                                         nla_get_in6_addr(a), is_mask);
 609                         ipv6 = true;
 610                         break;
 611                 case OVS_TUNNEL_KEY_ATTR_IPV6_DST:
 612                         SW_FLOW_KEY_PUT(match, tun_key.u.ipv6.dst,
 613                                         nla_get_in6_addr(a), is_mask);
 614                         ipv6 = true;
 615                         break;
 616                 case OVS_TUNNEL_KEY_ATTR_TOS:
 617                         SW_FLOW_KEY_PUT(match, tun_key.tos,
 618                                         nla_get_u8(a), is_mask);
 619                         break;
 620                 case OVS_TUNNEL_KEY_ATTR_TTL:
 621                         SW_FLOW_KEY_PUT(match, tun_key.ttl,
 622                                         nla_get_u8(a), is_mask);
 623                         ttl = true;
 624                         break;
 625                 case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT:
 626                         tun_flags |= TUNNEL_DONT_FRAGMENT;
 627                         break;
 628                 case OVS_TUNNEL_KEY_ATTR_CSUM:
 629                         tun_flags |= TUNNEL_CSUM;
 630                         break;
 631                 case OVS_TUNNEL_KEY_ATTR_TP_SRC:
 632                         SW_FLOW_KEY_PUT(match, tun_key.tp_src,
 633                                         nla_get_be16(a), is_mask);
 634                         break;
 635                 case OVS_TUNNEL_KEY_ATTR_TP_DST:
 636                         SW_FLOW_KEY_PUT(match, tun_key.tp_dst,
 637                                         nla_get_be16(a), is_mask);
 638                         break;
 639                 case OVS_TUNNEL_KEY_ATTR_OAM:
 640                         tun_flags |= TUNNEL_OAM;
 641                         break;
 642                 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
 643                         if (opts_type) {
 644                                 OVS_NLERR(log, "Multiple metadata blocks provided");
 645                                 return -EINVAL;
 646                         }
 647
 648                         err = genev_tun_opt_from_nlattr(a, match, is_mask, log);
 649                         if (err)
 650                                 return err;
 651
 652                         tun_flags |= TUNNEL_GENEVE_OPT;
 653                         opts_type = type;
 654                         break;
 655                 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
 656                         if (opts_type) {
 657                                 OVS_NLERR(log, "Multiple metadata blocks provided");
 658                                 return -EINVAL;
 659                         }
 660
 661                         err = vxlan_tun_opt_from_nlattr(a, match, is_mask, log);
 662                         if (err)
 663                                 return err;
 664
 665                         tun_flags |= TUNNEL_VXLAN_OPT;
 666                         opts_type = type;
 667                         break;
 668                 case OVS_TUNNEL_KEY_ATTR_PAD:
 669                         break;
 670                 default:
 671                         OVS_NLERR(log, "Unknown IP tunnel attribute %d",
 672                                   type);
 673                         return -EINVAL;
 674                 }
 675         }
 676
 677         SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask);
 678         if (is_mask)
 679                 SW_FLOW_KEY_MEMSET_FIELD(match, tun_proto, 0xff, true);
 680         else
 681                 SW_FLOW_KEY_PUT(match, tun_proto, ipv6 ? AF_INET6 : AF_INET,
 682                                 false);
 683
 684         if (rem > 0) {
 685                 OVS_NLERR(log, "IP tunnel attribute has %d unknown bytes.",
 686                           rem);
 687                 return -EINVAL;
 688         }
 689
 690         if (ipv4 && ipv6) {
 691                 OVS_NLERR(log, "Mixed IPv4 and IPv6 tunnel attributes");
 692                 return -EINVAL;
 693         }
 694
 695         if (!is_mask) {
 696                 if (!ipv4 && !ipv6) {
 697                         OVS_NLERR(log, "IP tunnel dst address not specified");
 698                         return -EINVAL;
 699                 }
 700                 if (ipv4 && !match->key->tun_key.u.ipv4.dst) {
 701                         OVS_NLERR(log, "IPv4 tunnel dst address is zero");
 702                         return -EINVAL;
 703                 }
 704                 if (ipv6 && ipv6_addr_any(&match->key->tun_key.u.ipv6.dst)) {
 705                         OVS_NLERR(log, "IPv6 tunnel dst address is zero");
 706                         return -EINVAL;
 707                 }
 708
 709                 if (!ttl) {
 710                         OVS_NLERR(log, "IP tunnel TTL not specified.");
 711                         return -EINVAL;
 712                 }
 713         }
 714
 715         return opts_type;
 716 }
 717
 718 static int vxlan_opt_to_nlattr(struct sk_buff *skb,
 719                                const void *tun_opts, int swkey_tun_opts_len)
 720 {
 721         const struct vxlan_metadata *opts = tun_opts;
 722         struct nlattr *nla;
 723
 724         nla = nla_nest_start(skb, OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS);
 725         if (!nla)
 726                 return -EMSGSIZE;
 727
 728         if (nla_put_u32(skb, OVS_VXLAN_EXT_GBP, opts->gbp) < 0)
 729                 return -EMSGSIZE;
 730
 731         nla_nest_end(skb, nla);
 732         return 0;
 733 }
 734
 735 static int __ip_tun_to_nlattr(struct sk_buff *skb,
 736                               const struct ip_tunnel_key *output,
 737                               const void *tun_opts, int swkey_tun_opts_len,
 738                               unsigned short tun_proto)
 739 {
 740         if (output->tun_flags & TUNNEL_KEY &&
 741             nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id,
 742                          OVS_TUNNEL_KEY_ATTR_PAD))
 743                 return -EMSGSIZE;
 744         switch (tun_proto) {
 745         case AF_INET:
 746                 if (output->u.ipv4.src &&
 747                     nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC,
 748                                     output->u.ipv4.src))
 749                         return -EMSGSIZE;
 750                 if (output->u.ipv4.dst &&
 751                     nla_put_in_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST,
 752                                     output->u.ipv4.dst))
 753                         return -EMSGSIZE;
 754                 break;
 755         case AF_INET6:
 756                 if (!ipv6_addr_any(&output->u.ipv6.src) &&
 757                     nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_SRC,
 758                                      &output->u.ipv6.src))
 759                         return -EMSGSIZE;
 760                 if (!ipv6_addr_any(&output->u.ipv6.dst) &&
 761                     nla_put_in6_addr(skb, OVS_TUNNEL_KEY_ATTR_IPV6_DST,
 762                                      &output->u.ipv6.dst))
 763                         return -EMSGSIZE;
 764                 break;
 765         }
 766         if (output->tos &&
 767             nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->tos))
 768                 return -EMSGSIZE;
 769         if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ttl))
 770                 return -EMSGSIZE;
 771         if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) &&
 772             nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT))
 773                 return -EMSGSIZE;
 774         if ((output->tun_flags & TUNNEL_CSUM) &&
 775             nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM))
 776                 return -EMSGSIZE;
 777         if (output->tp_src &&
 778             nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_SRC, output->tp_src))
 779                 return -EMSGSIZE;
 780         if (output->tp_dst &&
 781             nla_put_be16(skb, OVS_TUNNEL_KEY_ATTR_TP_DST, output->tp_dst))
 782                 return -EMSGSIZE;
 783         if ((output->tun_flags & TUNNEL_OAM) &&
 784             nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_OAM))
 785                 return -EMSGSIZE;
 786         if (swkey_tun_opts_len) {
 787                 if (output->tun_flags & TUNNEL_GENEVE_OPT &&
 788                     nla_put(skb, OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,
 789                             swkey_tun_opts_len, tun_opts))
 790                         return -EMSGSIZE;
 791                 else if (output->tun_flags & TUNNEL_VXLAN_OPT &&
 792                          vxlan_opt_to_nlattr(skb, tun_opts, swkey_tun_opts_len))
 793                         return -EMSGSIZE;
 794         }
 795
 796         return 0;
 797 }
 798
 799 static int ip_tun_to_nlattr(struct sk_buff *skb,
 800                             const struct ip_tunnel_key *output,
 801                             const void *tun_opts, int swkey_tun_opts_len,
 802                             unsigned short tun_proto)
 803 {
 804         struct nlattr *nla;
 805         int err;
 806
 807         nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL);
 808         if (!nla)
 809                 return -EMSGSIZE;
 810
 811         err = __ip_tun_to_nlattr(skb, output, tun_opts, swkey_tun_opts_len,
 812                                  tun_proto);
 813         if (err)
 814                 return err;
 815
 816         nla_nest_end(skb, nla);
 817         return 0;
 818 }
 819
 820 int ovs_nla_put_tunnel_info(struct sk_buff *skb,
 821                             struct ip_tunnel_info *tun_info)
 822 {
 823         return __ip_tun_to_nlattr(skb, &tun_info->key,
 824                                   ip_tunnel_info_opts(tun_info),
 825                                   tun_info->options_len,
 826                                   ip_tunnel_info_af(tun_info));
 827 }
 828
 829 static int encode_vlan_from_nlattrs(struct sw_flow_match *match,
 830                                     const struct nlattr *a[],
 831                                     bool is_mask, bool inner)
 832 {
 833         __be16 tci = 0;
 834         __be16 tpid = 0;
 835
 836         if (a[OVS_KEY_ATTR_VLAN])
 837                 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
 838
 839         if (a[OVS_KEY_ATTR_ETHERTYPE])
 840                 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
 841
 842         if (likely(!inner)) {
 843                 SW_FLOW_KEY_PUT(match, eth.vlan.tpid, tpid, is_mask);
 844                 SW_FLOW_KEY_PUT(match, eth.vlan.tci, tci, is_mask);
 845         } else {
 846                 SW_FLOW_KEY_PUT(match, eth.cvlan.tpid, tpid, is_mask);
 847                 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, tci, is_mask);
 848         }
 849         return 0;
 850 }
 851
 852 static int validate_vlan_from_nlattrs(const struct sw_flow_match *match,
 853                                       u64 key_attrs, bool inner,
 854                                       const struct nlattr **a, bool log)
 855 {
 856         __be16 tci = 0;
 857
 858         if (!((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) &&
 859               (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) &&
 860                eth_type_vlan(nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE])))) {
 861                 /* Not a VLAN. */
 862                 return 0;
 863         }
 864
 865         if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) &&
 866               (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) {
 867                 OVS_NLERR(log, "Invalid %s frame", (inner) ? "C-VLAN" : "VLAN");
 868                 return -EINVAL;
 869         }
 870
 871         if (a[OVS_KEY_ATTR_VLAN])
 872                 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
 873
 874         if (!(tci & htons(VLAN_TAG_PRESENT))) {
 875                 if (tci) {
 876                         OVS_NLERR(log, "%s TCI does not have VLAN_TAG_PRESENT bit set.",
 877                                   (inner) ? "C-VLAN" : "VLAN");
 878                         return -EINVAL;
 879                 } else if (nla_len(a[OVS_KEY_ATTR_ENCAP])) {
 880                         /* Corner case for truncated VLAN header. */
 881                         OVS_NLERR(log, "Truncated %s header has non-zero encap attribute.",
 882                                   (inner) ? "C-VLAN" : "VLAN");
 883                         return -EINVAL;
 884                 }
 885         }
 886
 887         return 1;
 888 }
 889
 890 static int validate_vlan_mask_from_nlattrs(const struct sw_flow_match *match,
 891                                            u64 key_attrs, bool inner,
 892                                            const struct nlattr **a, bool log)
 893 {
 894         __be16 tci = 0;
 895         __be16 tpid = 0;
 896         bool encap_valid = !!(match->key->eth.vlan.tci &
 897                               htons(VLAN_TAG_PRESENT));
 898         bool i_encap_valid = !!(match->key->eth.cvlan.tci &
 899                                 htons(VLAN_TAG_PRESENT));
 900
 901         if (!(key_attrs & (1 << OVS_KEY_ATTR_ENCAP))) {
 902                 /* Not a VLAN. */
 903                 return 0;
 904         }
 905
 906         if ((!inner && !encap_valid) || (inner && !i_encap_valid)) {
 907                 OVS_NLERR(log, "Encap mask attribute is set for non-%s frame.",
 908                           (inner) ? "C-VLAN" : "VLAN");
 909                 return -EINVAL;
 910         }
 911
 912         if (a[OVS_KEY_ATTR_VLAN])
 913                 tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]);
 914
 915         if (a[OVS_KEY_ATTR_ETHERTYPE])
 916                 tpid = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
 917
 918         if (tpid != htons(0xffff)) {
 919                 OVS_NLERR(log, "Must have an exact match on %s TPID (mask=%x).",
 920                           (inner) ? "C-VLAN" : "VLAN", ntohs(tpid));
 921                 return -EINVAL;
 922         }
 923         if (!(tci & htons(VLAN_TAG_PRESENT))) {
 924                 OVS_NLERR(log, "%s TCI mask does not have exact match for VLAN_TAG_PRESENT bit.",
 925                           (inner) ? "C-VLAN" : "VLAN");
 926                 return -EINVAL;
 927         }
 928
 929         return 1;
 930 }
 931
 932 static int __parse_vlan_from_nlattrs(struct sw_flow_match *match,
 933                                      u64 *key_attrs, bool inner,
 934                                      const struct nlattr **a, bool is_mask,
 935                                      bool log)
 936 {
 937         int err;
 938         const struct nlattr *encap;
 939
 940         if (!is_mask)
 941                 err = validate_vlan_from_nlattrs(match, *key_attrs, inner,
 942                                                  a, log);
 943         else
 944                 err = validate_vlan_mask_from_nlattrs(match, *key_attrs, inner,
 945                                                       a, log);
 946         if (err <= 0)
 947                 return err;
 948
 949         err = encode_vlan_from_nlattrs(match, a, is_mask, inner);
 950         if (err)
 951                 return err;
 952
 953         *key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP);
 954         *key_attrs &= ~(1 << OVS_KEY_ATTR_VLAN);
 955         *key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
 956
 957         encap = a[OVS_KEY_ATTR_ENCAP];
 958
 959         if (!is_mask)
 960                 err = parse_flow_nlattrs(encap, a, key_attrs, log);
 961         else
 962                 err = parse_flow_mask_nlattrs(encap, a, key_attrs, log);
 963
 964         return err;
 965 }
 966
 967 static int parse_vlan_from_nlattrs(struct sw_flow_match *match,
 968                                    u64 *key_attrs, const struct nlattr **a,
 969                                    bool is_mask, bool log)
 970 {
 971         int err;
 972         bool encap_valid = false;
 973
 974         err = __parse_vlan_from_nlattrs(match, key_attrs, false, a,
 975                                         is_mask, log);
 976         if (err)
 977                 return err;
 978
 979         encap_valid = !!(match->key->eth.vlan.tci & htons(VLAN_TAG_PRESENT));
 980         if (encap_valid) {
 981                 err = __parse_vlan_from_nlattrs(match, key_attrs, true, a,
 982                                                 is_mask, log);
 983                 if (err)
 984                         return err;
 985         }
 986
 987         return 0;
 988 }
 989
 990 static int parse_eth_type_from_nlattrs(struct sw_flow_match *match,
 991                                        u64 *attrs, const struct nlattr **a,
 992                                        bool is_mask, bool log)
 993 {
 994         __be16 eth_type;
 995
 996         eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]);
 997         if (is_mask) {
 998                 /* Always exact match EtherType. */
 999                 eth_type = htons(0xffff);
1000         } else if (!eth_proto_is_802_3(eth_type)) {
1001                 OVS_NLERR(log, "EtherType %x is less than min %x",
1002                                 ntohs(eth_type), ETH_P_802_3_MIN);
1003                 return -EINVAL;
1004         }
1005
1006         SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask);
1007         *attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE);
1008         return 0;
1009 }
1010
1011 static int metadata_from_nlattrs(struct net *net, struct sw_flow_match *match,
1012                                  u64 *attrs, const struct nlattr **a,
1013                                  bool is_mask, bool log)
1014 {
1015         u8 mac_proto = MAC_PROTO_ETHERNET;
1016
1017         if (*attrs & (1 << OVS_KEY_ATTR_DP_HASH)) {
1018                 u32 hash_val = nla_get_u32(a[OVS_KEY_ATTR_DP_HASH]);
1019
1020                 SW_FLOW_KEY_PUT(match, ovs_flow_hash, hash_val, is_mask);
1021                 *attrs &= ~(1 << OVS_KEY_ATTR_DP_HASH);
1022         }
1023
1024         if (*attrs & (1 << OVS_KEY_ATTR_RECIRC_ID)) {
1025                 u32 recirc_id = nla_get_u32(a[OVS_KEY_ATTR_RECIRC_ID]);
1026
1027                 SW_FLOW_KEY_PUT(match, recirc_id, recirc_id, is_mask);
1028                 *attrs &= ~(1 << OVS_KEY_ATTR_RECIRC_ID);
1029         }
1030
1031         if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) {
1032                 SW_FLOW_KEY_PUT(match, phy.priority,
1033                           nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask);
1034                 *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY);
1035         }
1036
1037         if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) {
1038                 u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]);
1039
1040                 if (is_mask) {
1041                         in_port = 0xffffffff; /* Always exact match in_port. */
1042                 } else if (in_port >= DP_MAX_PORTS) {
1043                         OVS_NLERR(log, "Port %d exceeds max allowable %d",
1044                                   in_port, DP_MAX_PORTS);
1045                         return -EINVAL;
1046                 }
1047
1048                 SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask);
1049                 *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT);
1050         } else if (!is_mask) {
1051                 SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask);
1052         }
1053
1054         if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) {
1055                 uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]);
1056
1057                 SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask);
1058                 *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK);
1059         }
1060         if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) {
1061                 if (ip_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match,
1062                                        is_mask, log) < 0)
1063                         return -EINVAL;
1064                 *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL);
1065         }
1066
1067         if (*attrs & (1 << OVS_KEY_ATTR_CT_STATE) &&
1068             ovs_ct_verify(net, OVS_KEY_ATTR_CT_STATE)) {
1069                 u32 ct_state = nla_get_u32(a[OVS_KEY_ATTR_CT_STATE]);
1070
1071                 if (ct_state & ~CT_SUPPORTED_MASK) {
1072                         OVS_NLERR(log, "ct_state flags %08x unsupported",
1073                                   ct_state);
1074                         return -EINVAL;
1075                 }
1076
1077                 SW_FLOW_KEY_PUT(match, ct_state, ct_state, is_mask);
1078                 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_STATE);
1079         }
1080         if (*attrs & (1 << OVS_KEY_ATTR_CT_ZONE) &&
1081             ovs_ct_verify(net, OVS_KEY_ATTR_CT_ZONE)) {
1082                 u16 ct_zone = nla_get_u16(a[OVS_KEY_ATTR_CT_ZONE]);
1083
1084                 SW_FLOW_KEY_PUT(match, ct_zone, ct_zone, is_mask);
1085                 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ZONE);
1086         }
1087         if (*attrs & (1 << OVS_KEY_ATTR_CT_MARK) &&
1088             ovs_ct_verify(net, OVS_KEY_ATTR_CT_MARK)) {
1089                 u32 mark = nla_get_u32(a[OVS_KEY_ATTR_CT_MARK]);
1090
1091                 SW_FLOW_KEY_PUT(match, ct.mark, mark, is_mask);
1092                 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_MARK);
1093         }
1094         if (*attrs & (1 << OVS_KEY_ATTR_CT_LABELS) &&
1095             ovs_ct_verify(net, OVS_KEY_ATTR_CT_LABELS)) {
1096                 const struct ovs_key_ct_labels *cl;
1097
1098                 cl = nla_data(a[OVS_KEY_ATTR_CT_LABELS]);
1099                 SW_FLOW_KEY_MEMCPY(match, ct.labels, cl->ct_labels,
1100                                    sizeof(*cl), is_mask);
1101                 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_LABELS);
1102         }
1103         if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4)) {
1104                 const struct ovs_key_ct_tuple_ipv4 *ct;
1105
1106                 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4]);
1107
1108                 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.src, ct->ipv4_src, is_mask);
1109                 SW_FLOW_KEY_PUT(match, ipv4.ct_orig.dst, ct->ipv4_dst, is_mask);
1110                 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1111                 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1112                 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv4_proto, is_mask);
1113                 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV4);
1114         }
1115         if (*attrs & (1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6)) {
1116                 const struct ovs_key_ct_tuple_ipv6 *ct;
1117
1118                 ct = nla_data(a[OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6]);
1119
1120                 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.src, &ct->ipv6_src,
1121                                    sizeof(match->key->ipv6.ct_orig.src),
1122                                    is_mask);
1123                 SW_FLOW_KEY_MEMCPY(match, ipv6.ct_orig.dst, &ct->ipv6_dst,
1124                                    sizeof(match->key->ipv6.ct_orig.dst),
1125                                    is_mask);
1126                 SW_FLOW_KEY_PUT(match, ct.orig_tp.src, ct->src_port, is_mask);
1127                 SW_FLOW_KEY_PUT(match, ct.orig_tp.dst, ct->dst_port, is_mask);
1128                 SW_FLOW_KEY_PUT(match, ct_orig_proto, ct->ipv6_proto, is_mask);
1129                 *attrs &= ~(1ULL << OVS_KEY_ATTR_CT_ORIG_TUPLE_IPV6);
1130         }
1131
1132         /* For layer 3 packets the Ethernet type is provided
1133          * and treated as metadata but no MAC addresses are provided.
1134          */
1135         if (!(*attrs & (1ULL << OVS_KEY_ATTR_ETHERNET)) &&
1136             (*attrs & (1ULL << OVS_KEY_ATTR_ETHERTYPE)))
1137                 mac_proto = MAC_PROTO_NONE;
1138
1139         /* Always exact match mac_proto */
1140         SW_FLOW_KEY_PUT(match, mac_proto, is_mask ? 0xff : mac_proto, is_mask);
1141
1142         if (mac_proto == MAC_PROTO_NONE)
1143                 return parse_eth_type_from_nlattrs(match, attrs, a, is_mask,
1144                                                    log);
1145
1146         return 0;
1147 }
1148
1149 static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
1150                                 u64 attrs, const struct nlattr **a,
1151                                 bool is_mask, bool log)
1152 {
1153         int err;
1154
1155         err = metadata_from_nlattrs(net, match, &attrs, a, is_mask, log);
1156         if (err)
1157                 return err;
1158
1159         if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) {
1160                 const struct ovs_key_ethernet *eth_key;
1161
1162                 eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]);
1163                 SW_FLOW_KEY_MEMCPY(match, eth.src,
1164                                 eth_key->eth_src, ETH_ALEN, is_mask);
1165                 SW_FLOW_KEY_MEMCPY(match, eth.dst,
1166                                 eth_key->eth_dst, ETH_ALEN, is_mask);
1167                 attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET);
1168
1169                 if (attrs & (1 << OVS_KEY_ATTR_VLAN)) {
1170                         /* VLAN attribute is always parsed before getting here since it
1171                          * may occur multiple times.
1172                          */
1173                         OVS_NLERR(log, "VLAN attribute unexpected.");
1174                         return -EINVAL;
1175                 }
1176
1177                 if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) {
1178                         err = parse_eth_type_from_nlattrs(match, &attrs, a, is_mask,
1179                                                           log);
1180                         if (err)
1181                                 return err;
1182                 } else if (!is_mask) {
1183                         SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask);
1184                 }
1185         } else if (!match->key->eth.type) {
1186                 OVS_NLERR(log, "Either Ethernet header or EtherType is required.");
1187                 return -EINVAL;
1188         }
1189
1190         if (attrs & (1 << OVS_KEY_ATTR_IPV4)) {
1191                 const struct ovs_key_ipv4 *ipv4_key;
1192
1193                 ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]);
1194                 if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) {
1195                         OVS_NLERR(log, "IPv4 frag type %d is out of range max %d",
1196                                   ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX);
1197                         return -EINVAL;
1198                 }
1199                 SW_FLOW_KEY_PUT(match, ip.proto,
1200                                 ipv4_key->ipv4_proto, is_mask);
1201                 SW_FLOW_KEY_PUT(match, ip.tos,
1202                                 ipv4_key->ipv4_tos, is_mask);
1203                 SW_FLOW_KEY_PUT(match, ip.ttl,
1204                                 ipv4_key->ipv4_ttl, is_mask);
1205                 SW_FLOW_KEY_PUT(match, ip.frag,
1206                                 ipv4_key->ipv4_frag, is_mask);
1207                 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1208                                 ipv4_key->ipv4_src, is_mask);
1209                 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1210                                 ipv4_key->ipv4_dst, is_mask);
1211                 attrs &= ~(1 << OVS_KEY_ATTR_IPV4);
1212         }
1213
1214         if (attrs & (1 << OVS_KEY_ATTR_IPV6)) {
1215                 const struct ovs_key_ipv6 *ipv6_key;
1216
1217                 ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]);
1218                 if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) {
1219                         OVS_NLERR(log, "IPv6 frag type %d is out of range max %d",
1220                                   ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX);
1221                         return -EINVAL;
1222                 }
1223
1224                 if (!is_mask && ipv6_key->ipv6_label & htonl(0xFFF00000)) {
1225                         OVS_NLERR(log, "IPv6 flow label %x is out of range (max=%x).\n",
1226                                   ntohl(ipv6_key->ipv6_label), (1 << 20) - 1);
1227                         return -EINVAL;
1228                 }
1229
1230                 SW_FLOW_KEY_PUT(match, ipv6.label,
1231                                 ipv6_key->ipv6_label, is_mask);
1232                 SW_FLOW_KEY_PUT(match, ip.proto,
1233                                 ipv6_key->ipv6_proto, is_mask);
1234                 SW_FLOW_KEY_PUT(match, ip.tos,
1235                                 ipv6_key->ipv6_tclass, is_mask);
1236                 SW_FLOW_KEY_PUT(match, ip.ttl,
1237                                 ipv6_key->ipv6_hlimit, is_mask);
1238                 SW_FLOW_KEY_PUT(match, ip.frag,
1239                                 ipv6_key->ipv6_frag, is_mask);
1240                 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src,
1241                                 ipv6_key->ipv6_src,
1242                                 sizeof(match->key->ipv6.addr.src),
1243                                 is_mask);
1244                 SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst,
1245                                 ipv6_key->ipv6_dst,
1246                                 sizeof(match->key->ipv6.addr.dst),
1247                                 is_mask);
1248
1249                 attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
1250         }
1251
1252         if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
1253                 const struct ovs_key_arp *arp_key;
1254
1255                 arp_key = nla_data(a[OVS_KEY_ATTR_ARP]);
1256                 if (!is_mask && (arp_key->arp_op & htons(0xff00))) {
1257                         OVS_NLERR(log, "Unknown ARP opcode (opcode=%d).",
1258                                   arp_key->arp_op);
1259                         return -EINVAL;
1260                 }
1261
1262                 SW_FLOW_KEY_PUT(match, ipv4.addr.src,
1263                                 arp_key->arp_sip, is_mask);
1264                 SW_FLOW_KEY_PUT(match, ipv4.addr.dst,
1265                         arp_key->arp_tip, is_mask);
1266                 SW_FLOW_KEY_PUT(match, ip.proto,
1267                                 ntohs(arp_key->arp_op), is_mask);
1268                 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha,
1269                                 arp_key->arp_sha, ETH_ALEN, is_mask);
1270                 SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha,
1271                                 arp_key->arp_tha, ETH_ALEN, is_mask);
1272
1273                 attrs &= ~(1 << OVS_KEY_ATTR_ARP);
1274         }
1275
1276         if (attrs & (1 << OVS_KEY_ATTR_MPLS)) {
1277                 const struct ovs_key_mpls *mpls_key;
1278
1279                 mpls_key = nla_data(a[OVS_KEY_ATTR_MPLS]);
1280                 SW_FLOW_KEY_PUT(match, mpls.top_lse,
1281                                 mpls_key->mpls_lse, is_mask);
1282
1283                 attrs &= ~(1 << OVS_KEY_ATTR_MPLS);
1284          }
1285
1286         if (attrs & (1 << OVS_KEY_ATTR_TCP)) {
1287                 const struct ovs_key_tcp *tcp_key;
1288
1289                 tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]);
1290                 SW_FLOW_KEY_PUT(match, tp.src, tcp_key->tcp_src, is_mask);
1291                 SW_FLOW_KEY_PUT(match, tp.dst, tcp_key->tcp_dst, is_mask);
1292                 attrs &= ~(1 << OVS_KEY_ATTR_TCP);
1293         }
1294
1295         if (attrs & (1 << OVS_KEY_ATTR_TCP_FLAGS)) {
1296                 SW_FLOW_KEY_PUT(match, tp.flags,
1297                                 nla_get_be16(a[OVS_KEY_ATTR_TCP_FLAGS]),
1298                                 is_mask);
1299                 attrs &= ~(1 << OVS_KEY_ATTR_TCP_FLAGS);
1300         }
1301
1302         if (attrs & (1 << OVS_KEY_ATTR_UDP)) {
1303                 const struct ovs_key_udp *udp_key;
1304
1305                 udp_key = nla_data(a[OVS_KEY_ATTR_UDP]);
1306                 SW_FLOW_KEY_PUT(match, tp.src, udp_key->udp_src, is_mask);
1307                 SW_FLOW_KEY_PUT(match, tp.dst, udp_key->udp_dst, is_mask);
1308                 attrs &= ~(1 << OVS_KEY_ATTR_UDP);
1309         }
1310
1311         if (attrs & (1 << OVS_KEY_ATTR_SCTP)) {
1312                 const struct ovs_key_sctp *sctp_key;
1313
1314                 sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]);
1315                 SW_FLOW_KEY_PUT(match, tp.src, sctp_key->sctp_src, is_mask);
1316                 SW_FLOW_KEY_PUT(match, tp.dst, sctp_key->sctp_dst, is_mask);
1317                 attrs &= ~(1 << OVS_KEY_ATTR_SCTP);
1318         }
1319
1320         if (attrs & (1 << OVS_KEY_ATTR_ICMP)) {
1321                 const struct ovs_key_icmp *icmp_key;
1322
1323                 icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]);
1324                 SW_FLOW_KEY_PUT(match, tp.src,
1325                                 htons(icmp_key->icmp_type), is_mask);
1326                 SW_FLOW_KEY_PUT(match, tp.dst,
1327                                 htons(icmp_key->icmp_code), is_mask);
1328                 attrs &= ~(1 << OVS_KEY_ATTR_ICMP);
1329         }
1330
1331         if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) {
1332                 const struct ovs_key_icmpv6 *icmpv6_key;
1333
1334                 icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]);
1335                 SW_FLOW_KEY_PUT(match, tp.src,
1336                                 htons(icmpv6_key->icmpv6_type), is_mask);
1337                 SW_FLOW_KEY_PUT(match, tp.dst,
1338                                 htons(icmpv6_key->icmpv6_code), is_mask);
1339                 attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6);
1340         }
1341
1342         if (attrs & (1 << OVS_KEY_ATTR_ND)) {
1343                 const struct ovs_key_nd *nd_key;
1344
1345                 nd_key = nla_data(a[OVS_KEY_ATTR_ND]);
1346                 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target,
1347                         nd_key->nd_target,
1348                         sizeof(match->key->ipv6.nd.target),
1349                         is_mask);
1350                 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll,
1351                         nd_key->nd_sll, ETH_ALEN, is_mask);
1352                 SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll,
1353                                 nd_key->nd_tll, ETH_ALEN, is_mask);
1354                 attrs &= ~(1 << OVS_KEY_ATTR_ND);
1355         }
1356
1357         if (attrs != 0) {
1358                 OVS_NLERR(log, "Unknown key attributes %llx",
1359                           (unsigned long long)attrs);
1360                 return -EINVAL;
1361         }
1362
1363         return 0;
1364 }
1365
1366 static void nlattr_set(struct nlattr *attr, u8 val,
1367                        const struct ovs_len_tbl *tbl)
1368 {
1369         struct nlattr *nla;
1370         int rem;
1371
1372         /* The nlattr stream should already have been validated */
1373         nla_for_each_nested(nla, attr, rem) {
1374                 if (tbl[nla_type(nla)].len == OVS_ATTR_NESTED) {
1375                         if (tbl[nla_type(nla)].next)
1376                                 tbl = tbl[nla_type(nla)].next;
1377                         nlattr_set(nla, val, tbl);
1378                 } else {
1379                         memset(nla_data(nla), val, nla_len(nla));
1380                 }
1381
1382                 if (nla_type(nla) == OVS_KEY_ATTR_CT_STATE)
1383                         *(u32 *)nla_data(nla) &= CT_SUPPORTED_MASK;
1384         }
1385 }
1386
1387 static void mask_set_nlattr(struct nlattr *attr, u8 val)
1388 {
1389         nlattr_set(attr, val, ovs_key_lens);
1390 }
1391
1392 /**
1393  * ovs_nla_get_match - parses Netlink attributes into a flow key and
1394  * mask. In case the 'mask' is NULL, the flow is treated as exact match
1395  * flow. Otherwise, it is treated as a wildcarded flow, except the mask
1396  * does not include any don't care bit.
1397  * @net: Used to determine per-namespace field support.
1398  * @match: receives the extracted flow match information.
1399  * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute
1400  * sequence. The fields should of the packet that triggered the creation
1401  * of this flow.
1402  * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink
1403  * attribute specifies the mask field of the wildcarded flow.
1404  * @log: Boolean to allow kernel error logging.  Normally true, but when
1405  * probing for feature compatibility this should be passed in as false to
1406  * suppress unnecessary error logging.
1407  */
1408 int ovs_nla_get_match(struct net *net, struct sw_flow_match *match,
1409                       const struct nlattr *nla_key,
1410                       const struct nlattr *nla_mask,
1411                       bool log)
1412 {
1413         const struct nlattr *a[OVS_KEY_ATTR_MAX + 1];
1414         struct nlattr *newmask = NULL;
1415         u64 key_attrs = 0;
1416         u64 mask_attrs = 0;
1417         int err;
1418
1419         err = parse_flow_nlattrs(nla_key, a, &key_attrs, log);
1420         if (err)
1421                 return err;
1422
1423         err = parse_vlan_from_nlattrs(match, &key_attrs, a, false, log);
1424         if (err)
1425                 return err;
1426
1427         err = ovs_key_from_nlattrs(net, match, key_attrs, a, false, log);
1428         if (err)
1429                 return err;
1430
1431         if (match->mask) {
1432                 if (!nla_mask) {
1433                         /* Create an exact match mask. We need to set to 0xff
1434                          * all the 'match->mask' fields that have been touched
1435                          * in 'match->key'. We cannot simply memset
1436                          * 'match->mask', because padding bytes and fields not
1437                          * specified in 'match->key' should be left to 0.
1438                          * Instead, we use a stream of netlink attributes,
1439                          * copied from 'key' and set to 0xff.
1440                          * ovs_key_from_nlattrs() will take care of filling
1441                          * 'match->mask' appropriately.
1442                          */
1443                         newmask = kmemdup(nla_key,
1444                                           nla_total_size(nla_len(nla_key)),
1445                                           GFP_KERNEL);
1446                         if (!newmask)
1447                                 return -ENOMEM;
1448
1449                         mask_set_nlattr(newmask, 0xff);
1450
1451                         /* The userspace does not send tunnel attributes that
1452                          * are 0, but we should not wildcard them nonetheless.
1453                          */
1454                         if (match->key->tun_proto)
1455                                 SW_FLOW_KEY_MEMSET_FIELD(match, tun_key,
1456                                                          0xff, true);
1457
1458                         nla_mask = newmask;
1459                 }
1460
1461                 err = parse_flow_mask_nlattrs(nla_mask, a, &mask_attrs, log);
1462                 if (err)
1463                         goto free_newmask;
1464
1465                 /* Always match on tci. */
1466                 SW_FLOW_KEY_PUT(match, eth.vlan.tci, htons(0xffff), true);
1467                 SW_FLOW_KEY_PUT(match, eth.cvlan.tci, htons(0xffff), true);
1468
1469                 err = parse_vlan_from_nlattrs(match, &mask_attrs, a, true, log);
1470                 if (err)
1471                         goto free_newmask;
1472
1473                 err = ovs_key_from_nlattrs(net, match, mask_attrs, a, true,
1474                                            log);
1475                 if (err)
1476                         goto free_newmask;
1477         }
1478
1479         if (!match_validate(match, key_attrs, mask_attrs, log))
1480                 err = -EINVAL;
1481
1482 free_newmask:
1483         kfree(newmask);
1484         return err;
1485 }
1486
1487 static size_t get_ufid_len(const struct nlattr *attr, bool log)
1488 {
1489         size_t len;
1490
1491         if (!attr)
1492                 return 0;
1493
1494         len = nla_len(attr);
1495         if (len < 1 || len > MAX_UFID_LENGTH) {
1496                 OVS_NLERR(log, "ufid size %u bytes exceeds the range (1, %d)",
1497                           nla_len(attr), MAX_UFID_LENGTH);
1498                 return 0;
1499         }
1500
1501         return len;
1502 }
1503
1504 /* Initializes 'flow->ufid', returning true if 'attr' contains a valid UFID,
1505  * or false otherwise.
1506  */
1507 bool ovs_nla_get_ufid(struct sw_flow_id *sfid, const struct nlattr *attr,
1508                       bool log)
1509 {
1510         sfid->ufid_len = get_ufid_len(attr, log);
1511         if (sfid->ufid_len)
1512                 memcpy(sfid->ufid, nla_data(attr), sfid->ufid_len);
1513
1514         return sfid->ufid_len;
1515 }
1516
1517 int ovs_nla_get_identifier(struct sw_flow_id *sfid, const struct nlattr *ufid,
1518                            const struct sw_flow_key *key, bool log)
1519 {
1520         struct sw_flow_key *new_key;
1521
1522         if (ovs_nla_get_ufid(sfid, ufid, log))
1523                 return 0;
1524
1525         /* If UFID was not provided, use unmasked key. */
1526         new_key = kmalloc(sizeof(*new_key), GFP_KERNEL);
1527         if (!new_key)
1528                 return -ENOMEM;
1529         memcpy(new_key, key, sizeof(*key));
1530         sfid->unmasked_key = new_key;
1531
1532         return 0;
1533 }
1534
1535 u32 ovs_nla_get_ufid_flags(const struct nlattr *attr)
1536 {
1537         return attr ? nla_get_u32(attr) : 0;
1538 }
1539
1540 /**
1541  * ovs_nla_get_flow_metadata - parses Netlink attributes into a flow key.
1542  * @net: Network namespace.
1543  * @key: Receives extracted in_port, priority, tun_key, skb_mark and conntrack
1544  * metadata.
1545  * @a: Array of netlink attributes holding parsed %OVS_KEY_ATTR_* Netlink
1546  * attributes.
1547  * @attrs: Bit mask for the netlink attributes included in @a.
1548  * @log: Boolean to allow kernel error logging.  Normally true, but when
1549  * probing for feature compatibility this should be passed in as false to
1550  * suppress unnecessary error logging.
1551  *
1552  * This parses a series of Netlink attributes that form a flow key, which must
1553  * take the same form accepted by flow_from_nlattrs(), but only enough of it to
1554  * get the metadata, that is, the parts of the flow key that cannot be
1555  * extracted from the packet itself.
1556  *
1557  * This must be called before the packet key fields are filled in 'key'.
1558  */
1559
1560 int ovs_nla_get_flow_metadata(struct net *net,
1561                               const struct nlattr *a[OVS_KEY_ATTR_MAX + 1],
1562                               u64 attrs, struct sw_flow_key *key, bool log)
1563 {
1564         struct sw_flow_match match;
1565
1566         memset(&match, 0, sizeof(match));
1567         match.key = key;
1568
1569         key->ct_state = 0;
1570         key->ct_zone = 0;
1571         key->ct_orig_proto = 0;
1572         memset(&key->ct, 0, sizeof(key->ct));
1573         memset(&key->ipv4.ct_orig, 0, sizeof(key->ipv4.ct_orig));
1574         memset(&key->ipv6.ct_orig, 0, sizeof(key->ipv6.ct_orig));
1575
1576         key->phy.in_port = DP_MAX_PORTS;
1577
1578         return metadata_from_nlattrs(net, &match, &attrs, a, false, log);
1579 }
1580
1581 static int ovs_nla_put_vlan(struct sk_buff *skb, const struct vlan_head *vh,
1582                             bool is_mask)
1583 {
1584         __be16 eth_type = !is_mask ? vh->tpid : htons(0xffff);
1585
1586         if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) ||
1587             nla_put_be16(skb, OVS_KEY_ATTR_VLAN, vh->tci))
1588                 return -EMSGSIZE;
1589         return 0;
1590 }
1591
1592 static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
1593                              const struct sw_flow_key *output, bool is_mask,
1594                              struct sk_buff *skb)
1595 {
1596         struct ovs_key_ethernet *eth_key;
1597         struct nlattr *nla;
1598         struct nlattr *encap = NULL;
1599         struct nlattr *in_encap = NULL;
1600
1601         if (nla_put_u32(skb, OVS_KEY_ATTR_RECIRC_ID, output->recirc_id))
1602                 goto nla_put_failure;
1603
1604         if (nla_put_u32(skb, OVS_KEY_ATTR_DP_HASH, output->ovs_flow_hash))
1605                 goto nla_put_failure;
1606
1607         if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority))
1608                 goto nla_put_failure;
1609
1610         if ((swkey->tun_proto || is_mask)) {
1611                 const void *opts = NULL;
1612
1613                 if (output->tun_key.tun_flags & TUNNEL_OPTIONS_PRESENT)
1614                         opts = TUN_METADATA_OPTS(output, swkey->tun_opts_len);
1615
1616                 if (ip_tun_to_nlattr(skb, &output->tun_key, opts,
1617                                      swkey->tun_opts_len, swkey->tun_proto))
1618                         goto nla_put_failure;
1619         }
1620
1621         if (swkey->phy.in_port == DP_MAX_PORTS) {
1622                 if (is_mask && (output->phy.in_port == 0xffff))
1623                         if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff))
1624                                 goto nla_put_failure;
1625         } else {
1626                 u16 upper_u16;
1627                 upper_u16 = !is_mask ? 0 : 0xffff;
1628
1629                 if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT,
1630                                 (upper_u16 << 16) | output->phy.in_port))
1631                         goto nla_put_failure;
1632         }
1633
1634         if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark))
1635                 goto nla_put_failure;
1636
1637         if (ovs_ct_put_key(swkey, output, skb))
1638                 goto nla_put_failure;
1639
1640         if (ovs_key_mac_proto(swkey) == MAC_PROTO_ETHERNET) {
1641                 nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key));
1642                 if (!nla)
1643                         goto nla_put_failure;
1644
1645                 eth_key = nla_data(nla);
1646                 ether_addr_copy(eth_key->eth_src, output->eth.src);
1647                 ether_addr_copy(eth_key->eth_dst, output->eth.dst);
1648
1649                 if (swkey->eth.vlan.tci || eth_type_vlan(swkey->eth.type)) {
1650                         if (ovs_nla_put_vlan(skb, &output->eth.vlan, is_mask))
1651                                 goto nla_put_failure;
1652                         encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1653                         if (!swkey->eth.vlan.tci)
1654                                 goto unencap;
1655
1656                         if (swkey->eth.cvlan.tci || eth_type_vlan(swkey->eth.type)) {
1657                                 if (ovs_nla_put_vlan(skb, &output->eth.cvlan, is_mask))
1658                                         goto nla_put_failure;
1659                                 in_encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP);
1660                                 if (!swkey->eth.cvlan.tci)
1661                                         goto unencap;
1662                         }
1663                 }
1664
1665                 if (swkey->eth.type == htons(ETH_P_802_2)) {
1666                         /*
1667                         * Ethertype 802.2 is represented in the netlink with omitted
1668                         * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and
1669                         * 0xffff in the mask attribute.  Ethertype can also
1670                         * be wildcarded.
1671                         */
1672                         if (is_mask && output->eth.type)
1673                                 if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE,
1674                                                         output->eth.type))
1675                                         goto nla_put_failure;
1676                         goto unencap;
1677                 }
1678         }
1679
1680         if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type))
1681                 goto nla_put_failure;
1682
1683         if (eth_type_vlan(swkey->eth.type)) {
1684                 /* There are 3 VLAN tags, we don't know anything about the rest
1685                  * of the packet, so truncate here.
1686                  */
1687                 WARN_ON_ONCE(!(encap && in_encap));
1688                 goto unencap;
1689         }
1690
1691         if (swkey->eth.type == htons(ETH_P_IP)) {
1692                 struct ovs_key_ipv4 *ipv4_key;
1693
1694                 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key));
1695                 if (!nla)
1696                         goto nla_put_failure;
1697                 ipv4_key = nla_data(nla);
1698                 ipv4_key->ipv4_src = output->ipv4.addr.src;
1699                 ipv4_key->ipv4_dst = output->ipv4.addr.dst;
1700                 ipv4_key->ipv4_proto = output->ip.proto;
1701                 ipv4_key->ipv4_tos = output->ip.tos;
1702                 ipv4_key->ipv4_ttl = output->ip.ttl;
1703                 ipv4_key->ipv4_frag = output->ip.frag;
1704         } else if (swkey->eth.type == htons(ETH_P_IPV6)) {
1705                 struct ovs_key_ipv6 *ipv6_key;
1706
1707                 nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
1708                 if (!nla)
1709                         goto nla_put_failure;
1710                 ipv6_key = nla_data(nla);
1711                 memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src,
1712                                 sizeof(ipv6_key->ipv6_src));
1713                 memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst,
1714                                 sizeof(ipv6_key->ipv6_dst));
1715                 ipv6_key->ipv6_label = output->ipv6.label;
1716                 ipv6_key->ipv6_proto = output->ip.proto;
1717                 ipv6_key->ipv6_tclass = output->ip.tos;
1718                 ipv6_key->ipv6_hlimit = output->ip.ttl;
1719                 ipv6_key->ipv6_frag = output->ip.frag;
1720         } else if (swkey->eth.type == htons(ETH_P_ARP) ||
1721                    swkey->eth.type == htons(ETH_P_RARP)) {
1722                 struct ovs_key_arp *arp_key;
1723
1724                 nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key));
1725                 if (!nla)
1726                         goto nla_put_failure;
1727                 arp_key = nla_data(nla);
1728                 memset(arp_key, 0, sizeof(struct ovs_key_arp));
1729                 arp_key->arp_sip = output->ipv4.addr.src;
1730                 arp_key->arp_tip = output->ipv4.addr.dst;
1731                 arp_key->arp_op = htons(output->ip.proto);
1732                 ether_addr_copy(arp_key->arp_sha, output->ipv4.arp.sha);
1733                 ether_addr_copy(arp_key->arp_tha, output->ipv4.arp.tha);
1734         } else if (eth_p_mpls(swkey->eth.type)) {
1735                 struct ovs_key_mpls *mpls_key;
1736
1737                 nla = nla_reserve(skb, OVS_KEY_ATTR_MPLS, sizeof(*mpls_key));
1738                 if (!nla)
1739                         goto nla_put_failure;
1740                 mpls_key = nla_data(nla);
1741                 mpls_key->mpls_lse = output->mpls.top_lse;
1742         }
1743
1744         if ((swkey->eth.type == htons(ETH_P_IP) ||
1745              swkey->eth.type == htons(ETH_P_IPV6)) &&
1746              swkey->ip.frag != OVS_FRAG_TYPE_LATER) {
1747
1748                 if (swkey->ip.proto == IPPROTO_TCP) {
1749                         struct ovs_key_tcp *tcp_key;
1750
1751                         nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key));
1752                         if (!nla)
1753                                 goto nla_put_failure;
1754                         tcp_key = nla_data(nla);
1755                         tcp_key->tcp_src = output->tp.src;
1756                         tcp_key->tcp_dst = output->tp.dst;
1757                         if (nla_put_be16(skb, OVS_KEY_ATTR_TCP_FLAGS,
1758                                          output->tp.flags))
1759                                 goto nla_put_failure;
1760                 } else if (swkey->ip.proto == IPPROTO_UDP) {
1761                         struct ovs_key_udp *udp_key;
1762
1763                         nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key));
1764                         if (!nla)
1765                                 goto nla_put_failure;
1766                         udp_key = nla_data(nla);
1767                         udp_key->udp_src = output->tp.src;
1768                         udp_key->udp_dst = output->tp.dst;
1769                 } else if (swkey->ip.proto == IPPROTO_SCTP) {
1770                         struct ovs_key_sctp *sctp_key;
1771
1772                         nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key));
1773                         if (!nla)
1774                                 goto nla_put_failure;
1775                         sctp_key = nla_data(nla);
1776                         sctp_key->sctp_src = output->tp.src;
1777                         sctp_key->sctp_dst = output->tp.dst;
1778                 } else if (swkey->eth.type == htons(ETH_P_IP) &&
1779                            swkey->ip.proto == IPPROTO_ICMP) {
1780                         struct ovs_key_icmp *icmp_key;
1781
1782                         nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key));
1783                         if (!nla)
1784                                 goto nla_put_failure;
1785                         icmp_key = nla_data(nla);
1786                         icmp_key->icmp_type = ntohs(output->tp.src);
1787                         icmp_key->icmp_code = ntohs(output->tp.dst);
1788                 } else if (swkey->eth.type == htons(ETH_P_IPV6) &&
1789                            swkey->ip.proto == IPPROTO_ICMPV6) {
1790                         struct ovs_key_icmpv6 *icmpv6_key;
1791
1792                         nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6,
1793                                                 sizeof(*icmpv6_key));
1794                         if (!nla)
1795                                 goto nla_put_failure;
1796                         icmpv6_key = nla_data(nla);
1797                         icmpv6_key->icmpv6_type = ntohs(output->tp.src);
1798                         icmpv6_key->icmpv6_code = ntohs(output->tp.dst);
1799
1800                         if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION ||
1801                             icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) {
1802                                 struct ovs_key_nd *nd_key;
1803
1804                                 nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key));
1805                                 if (!nla)
1806                                         goto nla_put_failure;
1807                                 nd_key = nla_data(nla);
1808                                 memcpy(nd_key->nd_target, &output->ipv6.nd.target,
1809                                                         sizeof(nd_key->nd_target));
1810                                 ether_addr_copy(nd_key->nd_sll, output->ipv6.nd.sll);
1811                                 ether_addr_copy(nd_key->nd_tll, output->ipv6.nd.tll);
1812                         }
1813                 }
1814         }
1815
1816 unencap:
1817         if (in_encap)
1818                 nla_nest_end(skb, in_encap);
1819         if (encap)
1820                 nla_nest_end(skb, encap);
1821
1822         return 0;
1823
1824 nla_put_failure:
1825         return -EMSGSIZE;
1826 }
1827
1828 int ovs_nla_put_key(const struct sw_flow_key *swkey,
1829                     const struct sw_flow_key *output, int attr, bool is_mask,
1830                     struct sk_buff *skb)
1831 {
1832         int err;
1833         struct nlattr *nla;
1834
1835         nla = nla_nest_start(skb, attr);
1836         if (!nla)
1837                 return -EMSGSIZE;
1838         err = __ovs_nla_put_key(swkey, output, is_mask, skb);
1839         if (err)
1840                 return err;
1841         nla_nest_end(skb, nla);
1842
1843         return 0;
1844 }
1845
1846 /* Called with ovs_mutex or RCU read lock. */
1847 int ovs_nla_put_identifier(const struct sw_flow *flow, struct sk_buff *skb)
1848 {
1849         if (ovs_identifier_is_ufid(&flow->id))
1850                 return nla_put(skb, OVS_FLOW_ATTR_UFID, flow->id.ufid_len,
1851                                flow->id.ufid);
1852
1853         return ovs_nla_put_key(flow->id.unmasked_key, flow->id.unmasked_key,
1854                                OVS_FLOW_ATTR_KEY, false, skb);
1855 }
1856
1857 /* Called with ovs_mutex or RCU read lock. */
1858 int ovs_nla_put_masked_key(const struct sw_flow *flow, struct sk_buff *skb)
1859 {
1860         return ovs_nla_put_key(&flow->key, &flow->key,
1861                                 OVS_FLOW_ATTR_KEY, false, skb);
1862 }
1863
1864 /* Called with ovs_mutex or RCU read lock. */
1865 int ovs_nla_put_mask(const struct sw_flow *flow, struct sk_buff *skb)
1866 {
1867         return ovs_nla_put_key(&flow->key, &flow->mask->key,
1868                                 OVS_FLOW_ATTR_MASK, true, skb);
1869 }
1870
1871 #define MAX_ACTIONS_BUFSIZE     (32 * 1024)
1872
1873 static struct sw_flow_actions *nla_alloc_flow_actions(int size, bool log)
1874 {
1875         struct sw_flow_actions *sfa;
1876
1877         if (size > MAX_ACTIONS_BUFSIZE) {
1878                 OVS_NLERR(log, "Flow action size %u bytes exceeds max", size);
1879                 return ERR_PTR(-EINVAL);
1880         }
1881
1882         sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL);
1883         if (!sfa)
1884                 return ERR_PTR(-ENOMEM);
1885
1886         sfa->actions_len = 0;
1887         return sfa;
1888 }
1889
1890 static void ovs_nla_free_set_action(const struct nlattr *a)
1891 {
1892         const struct nlattr *ovs_key = nla_data(a);
1893         struct ovs_tunnel_info *ovs_tun;
1894
1895         switch (nla_type(ovs_key)) {
1896         case OVS_KEY_ATTR_TUNNEL_INFO:
1897                 ovs_tun = nla_data(ovs_key);
1898                 dst_release((struct dst_entry *)ovs_tun->tun_dst);
1899                 break;
1900         }
1901 }
1902
1903 void ovs_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
1904 {
1905         const struct nlattr *a;
1906         int rem;
1907
1908         if (!sf_acts)
1909                 return;
1910
1911         nla_for_each_attr(a, sf_acts->actions, sf_acts->actions_len, rem) {
1912                 switch (nla_type(a)) {
1913                 case OVS_ACTION_ATTR_SET:
1914                         ovs_nla_free_set_action(a);
1915                         break;
1916                 case OVS_ACTION_ATTR_CT:
1917                         ovs_ct_free_action(a);
1918                         break;
1919                 }
1920         }
1921
1922         kfree(sf_acts);
1923 }
1924
1925 static void __ovs_nla_free_flow_actions(struct rcu_head *head)
1926 {
1927         ovs_nla_free_flow_actions(container_of(head, struct sw_flow_actions, rcu));
1928 }
1929
1930 /* Schedules 'sf_acts' to be freed after the next RCU grace period.
1931  * The caller must hold rcu_read_lock for this to be sensible. */
1932 void ovs_nla_free_flow_actions_rcu(struct sw_flow_actions *sf_acts)
1933 {
1934         call_rcu(&sf_acts->rcu, __ovs_nla_free_flow_actions);
1935 }
1936
1937 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
1938                                        int attr_len, bool log)
1939 {
1940
1941         struct sw_flow_actions *acts;
1942         int new_acts_size;
1943         int req_size = NLA_ALIGN(attr_len);
1944         int next_offset = offsetof(struct sw_flow_actions, actions) +
1945                                         (*sfa)->actions_len;
1946
1947         if (req_size <= (ksize(*sfa) - next_offset))
1948                 goto out;
1949
1950         new_acts_size = ksize(*sfa) * 2;
1951
1952         if (new_acts_size > MAX_ACTIONS_BUFSIZE) {
1953                 if ((MAX_ACTIONS_BUFSIZE - next_offset) < req_size)
1954                         return ERR_PTR(-EMSGSIZE);
1955                 new_acts_size = MAX_ACTIONS_BUFSIZE;
1956         }
1957
1958         acts = nla_alloc_flow_actions(new_acts_size, log);
1959         if (IS_ERR(acts))
1960                 return (void *)acts;
1961
1962         memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len);
1963         acts->actions_len = (*sfa)->actions_len;
1964         acts->orig_len = (*sfa)->orig_len;
1965         kfree(*sfa);
1966         *sfa = acts;
1967
1968 out:
1969         (*sfa)->actions_len += req_size;
1970         return  (struct nlattr *) ((unsigned char *)(*sfa) + next_offset);
1971 }
1972
1973 static struct nlattr *__add_action(struct sw_flow_actions **sfa,
1974                                    int attrtype, void *data, int len, bool log)
1975 {
1976         struct nlattr *a;
1977
1978         a = reserve_sfa_size(sfa, nla_attr_size(len), log);
1979         if (IS_ERR(a))
1980                 return a;
1981
1982         a->nla_type = attrtype;
1983         a->nla_len = nla_attr_size(len);
1984
1985         if (data)
1986                 memcpy(nla_data(a), data, len);
1987         memset((unsigned char *) a + a->nla_len, 0, nla_padlen(len));
1988
1989         return a;
1990 }
1991
1992 int ovs_nla_add_action(struct sw_flow_actions **sfa, int attrtype, void *data,
1993                        int len, bool log)
1994 {
1995         struct nlattr *a;
1996
1997         a = __add_action(sfa, attrtype, data, len, log);
1998
1999         return PTR_ERR_OR_ZERO(a);
2000 }
2001
2002 static inline int add_nested_action_start(struct sw_flow_actions **sfa,
2003                                           int attrtype, bool log)
2004 {
2005         int used = (*sfa)->actions_len;
2006         int err;
2007
2008         err = ovs_nla_add_action(sfa, attrtype, NULL, 0, log);
2009         if (err)
2010                 return err;
2011
2012         return used;
2013 }
2014
2015 static inline void add_nested_action_end(struct sw_flow_actions *sfa,
2016                                          int st_offset)
2017 {
2018         struct nlattr *a = (struct nlattr *) ((unsigned char *)sfa->actions +
2019                                                                st_offset);
2020
2021         a->nla_len = sfa->actions_len - st_offset;
2022 }
2023
2024 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2025                                   const struct sw_flow_key *key,
2026                                   int depth, struct sw_flow_actions **sfa,
2027                                   __be16 eth_type, __be16 vlan_tci, bool log);
2028
2029 static int validate_and_copy_sample(struct net *net, const struct nlattr *attr,
2030                                     const struct sw_flow_key *key, int depth,
2031                                     struct sw_flow_actions **sfa,
2032                                     __be16 eth_type, __be16 vlan_tci, bool log)
2033 {
2034         const struct nlattr *attrs[OVS_SAMPLE_ATTR_MAX + 1];
2035         const struct nlattr *probability, *actions;
2036         const struct nlattr *a;
2037         int rem, start, err, st_acts;
2038
2039         memset(attrs, 0, sizeof(attrs));
2040         nla_for_each_nested(a, attr, rem) {
2041                 int type = nla_type(a);
2042                 if (!type || type > OVS_SAMPLE_ATTR_MAX || attrs[type])
2043                         return -EINVAL;
2044                 attrs[type] = a;
2045         }
2046         if (rem)
2047                 return -EINVAL;
2048
2049         probability = attrs[OVS_SAMPLE_ATTR_PROBABILITY];
2050         if (!probability || nla_len(probability) != sizeof(u32))
2051                 return -EINVAL;
2052
2053         actions = attrs[OVS_SAMPLE_ATTR_ACTIONS];
2054         if (!actions || (nla_len(actions) && nla_len(actions) < NLA_HDRLEN))
2055                 return -EINVAL;
2056
2057         /* validation done, copy sample action. */
2058         start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SAMPLE, log);
2059         if (start < 0)
2060                 return start;
2061         err = ovs_nla_add_action(sfa, OVS_SAMPLE_ATTR_PROBABILITY,
2062                                  nla_data(probability), sizeof(u32), log);
2063         if (err)
2064                 return err;
2065         st_acts = add_nested_action_start(sfa, OVS_SAMPLE_ATTR_ACTIONS, log);
2066         if (st_acts < 0)
2067                 return st_acts;
2068
2069         err = __ovs_nla_copy_actions(net, actions, key, depth + 1, sfa,
2070                                      eth_type, vlan_tci, log);
2071         if (err)
2072                 return err;
2073
2074         add_nested_action_end(*sfa, st_acts);
2075         add_nested_action_end(*sfa, start);
2076
2077         return 0;
2078 }
2079
2080 void ovs_match_init(struct sw_flow_match *match,
2081                     struct sw_flow_key *key,
2082                     bool reset_key,
2083                     struct sw_flow_mask *mask)
2084 {
2085         memset(match, 0, sizeof(*match));
2086         match->key = key;
2087         match->mask = mask;
2088
2089         if (reset_key)
2090                 memset(key, 0, sizeof(*key));
2091
2092         if (mask) {
2093                 memset(&mask->key, 0, sizeof(mask->key));
2094                 mask->range.start = mask->range.end = 0;
2095         }
2096 }
2097
2098 static int validate_geneve_opts(struct sw_flow_key *key)
2099 {
2100         struct geneve_opt *option;
2101         int opts_len = key->tun_opts_len;
2102         bool crit_opt = false;
2103
2104         option = (struct geneve_opt *)TUN_METADATA_OPTS(key, key->tun_opts_len);
2105         while (opts_len > 0) {
2106                 int len;
2107
2108                 if (opts_len < sizeof(*option))
2109                         return -EINVAL;
2110
2111                 len = sizeof(*option) + option->length * 4;
2112                 if (len > opts_len)
2113                         return -EINVAL;
2114
2115                 crit_opt |= !!(option->type & GENEVE_CRIT_OPT_TYPE);
2116
2117                 option = (struct geneve_opt *)((u8 *)option + len);
2118                 opts_len -= len;
2119         };
2120
2121         key->tun_key.tun_flags |= crit_opt ? TUNNEL_CRIT_OPT : 0;
2122
2123         return 0;
2124 }
2125
2126 static int validate_and_copy_set_tun(const struct nlattr *attr,
2127                                      struct sw_flow_actions **sfa, bool log)
2128 {
2129         struct sw_flow_match match;
2130         struct sw_flow_key key;
2131         struct metadata_dst *tun_dst;
2132         struct ip_tunnel_info *tun_info;
2133         struct ovs_tunnel_info *ovs_tun;
2134         struct nlattr *a;
2135         int err = 0, start, opts_type;
2136
2137         ovs_match_init(&match, &key, true, NULL);
2138         opts_type = ip_tun_from_nlattr(nla_data(attr), &match, false, log);
2139         if (opts_type < 0)
2140                 return opts_type;
2141
2142         if (key.tun_opts_len) {
2143                 switch (opts_type) {
2144                 case OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS:
2145                         err = validate_geneve_opts(&key);
2146                         if (err < 0)
2147                                 return err;
2148                         break;
2149                 case OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS:
2150                         break;
2151                 }
2152         };
2153
2154         start = add_nested_action_start(sfa, OVS_ACTION_ATTR_SET, log);
2155         if (start < 0)
2156                 return start;
2157
2158         tun_dst = metadata_dst_alloc(key.tun_opts_len, GFP_KERNEL);
2159         if (!tun_dst)
2160                 return -ENOMEM;
2161
2162         err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
2163         if (err) {
2164                 dst_release((struct dst_entry *)tun_dst);
2165                 return err;
2166         }
2167
2168         a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
2169                          sizeof(*ovs_tun), log);
2170         if (IS_ERR(a)) {
2171                 dst_release((struct dst_entry *)tun_dst);
2172                 return PTR_ERR(a);
2173         }
2174
2175         ovs_tun = nla_data(a);
2176         ovs_tun->tun_dst = tun_dst;
2177
2178         tun_info = &tun_dst->u.tun_info;
2179         tun_info->mode = IP_TUNNEL_INFO_TX;
2180         if (key.tun_proto == AF_INET6)
2181                 tun_info->mode |= IP_TUNNEL_INFO_IPV6;
2182         tun_info->key = key.tun_key;
2183
2184         /* We need to store the options in the action itself since
2185          * everything else will go away after flow setup. We can append
2186          * it to tun_info and then point there.
2187          */
2188         ip_tunnel_info_opts_set(tun_info,
2189                                 TUN_METADATA_OPTS(&key, key.tun_opts_len),
2190                                 key.tun_opts_len);
2191         add_nested_action_end(*sfa, start);
2192
2193         return err;
2194 }
2195
2196 /* Return false if there are any non-masked bits set.
2197  * Mask follows data immediately, before any netlink padding.
2198  */
2199 static bool validate_masked(u8 *data, int len)
2200 {
2201         u8 *mask = data + len;
2202
2203         while (len--)
2204                 if (*data++ & ~*mask++)
2205                         return false;
2206
2207         return true;
2208 }
2209
2210 static int validate_set(const struct nlattr *a,
2211                         const struct sw_flow_key *flow_key,
2212                         struct sw_flow_actions **sfa, bool *skip_copy,
2213                         u8 mac_proto, __be16 eth_type, bool masked, bool log)
2214 {
2215         const struct nlattr *ovs_key = nla_data(a);
2216         int key_type = nla_type(ovs_key);
2217         size_t key_len;
2218
2219         /* There can be only one key in a action */
2220         if (nla_total_size(nla_len(ovs_key)) != nla_len(a))
2221                 return -EINVAL;
2222
2223         key_len = nla_len(ovs_key);
2224         if (masked)
2225                 key_len /= 2;
2226
2227         if (key_type > OVS_KEY_ATTR_MAX ||
2228             !check_attr_len(key_len, ovs_key_lens[key_type].len))
2229                 return -EINVAL;
2230
2231         if (masked && !validate_masked(nla_data(ovs_key), key_len))
2232                 return -EINVAL;
2233
2234         switch (key_type) {
2235         const struct ovs_key_ipv4 *ipv4_key;
2236         const struct ovs_key_ipv6 *ipv6_key;
2237         int err;
2238
2239         case OVS_KEY_ATTR_PRIORITY:
2240         case OVS_KEY_ATTR_SKB_MARK:
2241         case OVS_KEY_ATTR_CT_MARK:
2242         case OVS_KEY_ATTR_CT_LABELS:
2243                 break;
2244
2245         case OVS_KEY_ATTR_ETHERNET:
2246                 if (mac_proto != MAC_PROTO_ETHERNET)
2247                         return -EINVAL;
2248                 break;
2249
2250         case OVS_KEY_ATTR_TUNNEL:
2251                 if (masked)
2252                         return -EINVAL; /* Masked tunnel set not supported. */
2253
2254                 *skip_copy = true;
2255                 err = validate_and_copy_set_tun(a, sfa, log);
2256                 if (err)
2257                         return err;
2258                 break;
2259
2260         case OVS_KEY_ATTR_IPV4:
2261                 if (eth_type != htons(ETH_P_IP))
2262                         return -EINVAL;
2263
2264                 ipv4_key = nla_data(ovs_key);
2265
2266                 if (masked) {
2267                         const struct ovs_key_ipv4 *mask = ipv4_key + 1;
2268
2269                         /* Non-writeable fields. */
2270                         if (mask->ipv4_proto || mask->ipv4_frag)
2271                                 return -EINVAL;
2272                 } else {
2273                         if (ipv4_key->ipv4_proto != flow_key->ip.proto)
2274                                 return -EINVAL;
2275
2276                         if (ipv4_key->ipv4_frag != flow_key->ip.frag)
2277                                 return -EINVAL;
2278                 }
2279                 break;
2280
2281         case OVS_KEY_ATTR_IPV6:
2282                 if (eth_type != htons(ETH_P_IPV6))
2283                         return -EINVAL;
2284
2285                 ipv6_key = nla_data(ovs_key);
2286
2287                 if (masked) {
2288                         const struct ovs_key_ipv6 *mask = ipv6_key + 1;
2289
2290                         /* Non-writeable fields. */
2291                         if (mask->ipv6_proto || mask->ipv6_frag)
2292                                 return -EINVAL;
2293
2294                         /* Invalid bits in the flow label mask? */
2295                         if (ntohl(mask->ipv6_label) & 0xFFF00000)
2296                                 return -EINVAL;
2297                 } else {
2298                         if (ipv6_key->ipv6_proto != flow_key->ip.proto)
2299                                 return -EINVAL;
2300
2301                         if (ipv6_key->ipv6_frag != flow_key->ip.frag)
2302                                 return -EINVAL;
2303                 }
2304                 if (ntohl(ipv6_key->ipv6_label) & 0xFFF00000)
2305                         return -EINVAL;
2306
2307                 break;
2308
2309         case OVS_KEY_ATTR_TCP:
2310                 if ((eth_type != htons(ETH_P_IP) &&
2311                      eth_type != htons(ETH_P_IPV6)) ||
2312                     flow_key->ip.proto != IPPROTO_TCP)
2313                         return -EINVAL;
2314
2315                 break;
2316
2317         case OVS_KEY_ATTR_UDP:
2318                 if ((eth_type != htons(ETH_P_IP) &&
2319                      eth_type != htons(ETH_P_IPV6)) ||
2320                     flow_key->ip.proto != IPPROTO_UDP)
2321                         return -EINVAL;
2322
2323                 break;
2324
2325         case OVS_KEY_ATTR_MPLS:
2326                 if (!eth_p_mpls(eth_type))
2327                         return -EINVAL;
2328                 break;
2329
2330         case OVS_KEY_ATTR_SCTP:
2331                 if ((eth_type != htons(ETH_P_IP) &&
2332                      eth_type != htons(ETH_P_IPV6)) ||
2333                     flow_key->ip.proto != IPPROTO_SCTP)
2334                         return -EINVAL;
2335
2336                 break;
2337
2338         default:
2339                 return -EINVAL;
2340         }
2341
2342         /* Convert non-masked non-tunnel set actions to masked set actions. */
2343         if (!masked && key_type != OVS_KEY_ATTR_TUNNEL) {
2344                 int start, len = key_len * 2;
2345                 struct nlattr *at;
2346
2347                 *skip_copy = true;
2348
2349                 start = add_nested_action_start(sfa,
2350                                                 OVS_ACTION_ATTR_SET_TO_MASKED,
2351                                                 log);
2352                 if (start < 0)
2353                         return start;
2354
2355                 at = __add_action(sfa, key_type, NULL, len, log);
2356                 if (IS_ERR(at))
2357                         return PTR_ERR(at);
2358
2359                 memcpy(nla_data(at), nla_data(ovs_key), key_len); /* Key. */
2360                 memset(nla_data(at) + key_len, 0xff, key_len);    /* Mask. */
2361                 /* Clear non-writeable bits from otherwise writeable fields. */
2362                 if (key_type == OVS_KEY_ATTR_IPV6) {
2363                         struct ovs_key_ipv6 *mask = nla_data(at) + key_len;
2364
2365                         mask->ipv6_label &= htonl(0x000FFFFF);
2366                 }
2367                 add_nested_action_end(*sfa, start);
2368         }
2369
2370         return 0;
2371 }
2372
2373 static int validate_userspace(const struct nlattr *attr)
2374 {
2375         static const struct nla_policy userspace_policy[OVS_USERSPACE_ATTR_MAX + 1] = {
2376                 [OVS_USERSPACE_ATTR_PID] = {.type = NLA_U32 },
2377                 [OVS_USERSPACE_ATTR_USERDATA] = {.type = NLA_UNSPEC },
2378                 [OVS_USERSPACE_ATTR_EGRESS_TUN_PORT] = {.type = NLA_U32 },
2379         };
2380         struct nlattr *a[OVS_USERSPACE_ATTR_MAX + 1];
2381         int error;
2382
2383         error = nla_parse_nested(a, OVS_USERSPACE_ATTR_MAX,
2384                                  attr, userspace_policy);
2385         if (error)
2386                 return error;
2387
2388         if (!a[OVS_USERSPACE_ATTR_PID] ||
2389             !nla_get_u32(a[OVS_USERSPACE_ATTR_PID]))
2390                 return -EINVAL;
2391
2392         return 0;
2393 }
2394
2395 static int copy_action(const struct nlattr *from,
2396                        struct sw_flow_actions **sfa, bool log)
2397 {
2398         int totlen = NLA_ALIGN(from->nla_len);
2399         struct nlattr *to;
2400
2401         to = reserve_sfa_size(sfa, from->nla_len, log);
2402         if (IS_ERR(to))
2403                 return PTR_ERR(to);
2404
2405         memcpy(to, from, totlen);
2406         return 0;
2407 }
2408
2409 static int __ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2410                                   const struct sw_flow_key *key,
2411                                   int depth, struct sw_flow_actions **sfa,
2412                                   __be16 eth_type, __be16 vlan_tci, bool log)
2413 {
2414         u8 mac_proto = ovs_key_mac_proto(key);
2415         const struct nlattr *a;
2416         int rem, err;
2417
2418         if (depth >= SAMPLE_ACTION_DEPTH)
2419                 return -EOVERFLOW;
2420
2421         nla_for_each_nested(a, attr, rem) {
2422                 /* Expected argument lengths, (u32)-1 for variable length. */
2423                 static const u32 action_lens[OVS_ACTION_ATTR_MAX + 1] = {
2424                         [OVS_ACTION_ATTR_OUTPUT] = sizeof(u32),
2425                         [OVS_ACTION_ATTR_RECIRC] = sizeof(u32),
2426                         [OVS_ACTION_ATTR_USERSPACE] = (u32)-1,
2427                         [OVS_ACTION_ATTR_PUSH_MPLS] = sizeof(struct ovs_action_push_mpls),
2428                         [OVS_ACTION_ATTR_POP_MPLS] = sizeof(__be16),
2429                         [OVS_ACTION_ATTR_PUSH_VLAN] = sizeof(struct ovs_action_push_vlan),
2430                         [OVS_ACTION_ATTR_POP_VLAN] = 0,
2431                         [OVS_ACTION_ATTR_SET] = (u32)-1,
2432                         [OVS_ACTION_ATTR_SET_MASKED] = (u32)-1,
2433                         [OVS_ACTION_ATTR_SAMPLE] = (u32)-1,
2434                         [OVS_ACTION_ATTR_HASH] = sizeof(struct ovs_action_hash),
2435                         [OVS_ACTION_ATTR_CT] = (u32)-1,
2436                         [OVS_ACTION_ATTR_TRUNC] = sizeof(struct ovs_action_trunc),
2437                         [OVS_ACTION_ATTR_PUSH_ETH] = sizeof(struct ovs_action_push_eth),
2438                         [OVS_ACTION_ATTR_POP_ETH] = 0,
2439                 };
2440                 const struct ovs_action_push_vlan *vlan;
2441                 int type = nla_type(a);
2442                 bool skip_copy;
2443
2444                 if (type > OVS_ACTION_ATTR_MAX ||
2445                     (action_lens[type] != nla_len(a) &&
2446                      action_lens[type] != (u32)-1))
2447                         return -EINVAL;
2448
2449                 skip_copy = false;
2450                 switch (type) {
2451                 case OVS_ACTION_ATTR_UNSPEC:
2452                         return -EINVAL;
2453
2454                 case OVS_ACTION_ATTR_USERSPACE:
2455                         err = validate_userspace(a);
2456                         if (err)
2457                                 return err;
2458                         break;
2459
2460                 case OVS_ACTION_ATTR_OUTPUT:
2461                         if (nla_get_u32(a) >= DP_MAX_PORTS)
2462                                 return -EINVAL;
2463                         break;
2464
2465                 case OVS_ACTION_ATTR_TRUNC: {
2466                         const struct ovs_action_trunc *trunc = nla_data(a);
2467
2468                         if (trunc->max_len < ETH_HLEN)
2469                                 return -EINVAL;
2470                         break;
2471                 }
2472
2473                 case OVS_ACTION_ATTR_HASH: {
2474                         const struct ovs_action_hash *act_hash = nla_data(a);
2475
2476                         switch (act_hash->hash_alg) {
2477                         case OVS_HASH_ALG_L4:
2478                                 break;
2479                         default:
2480                                 return  -EINVAL;
2481                         }
2482
2483                         break;
2484                 }
2485
2486                 case OVS_ACTION_ATTR_POP_VLAN:
2487                         if (mac_proto != MAC_PROTO_ETHERNET)
2488                                 return -EINVAL;
2489                         vlan_tci = htons(0);
2490                         break;
2491
2492                 case OVS_ACTION_ATTR_PUSH_VLAN:
2493                         if (mac_proto != MAC_PROTO_ETHERNET)
2494                                 return -EINVAL;
2495                         vlan = nla_data(a);
2496                         if (!eth_type_vlan(vlan->vlan_tpid))
2497                                 return -EINVAL;
2498                         if (!(vlan->vlan_tci & htons(VLAN_TAG_PRESENT)))
2499                                 return -EINVAL;
2500                         vlan_tci = vlan->vlan_tci;
2501                         break;
2502
2503                 case OVS_ACTION_ATTR_RECIRC:
2504                         break;
2505
2506                 case OVS_ACTION_ATTR_PUSH_MPLS: {
2507                         const struct ovs_action_push_mpls *mpls = nla_data(a);
2508
2509                         if (!eth_p_mpls(mpls->mpls_ethertype))
2510                                 return -EINVAL;
2511                         /* Prohibit push MPLS other than to a white list
2512                          * for packets that have a known tag order.
2513                          */
2514                         if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2515                             (eth_type != htons(ETH_P_IP) &&
2516                              eth_type != htons(ETH_P_IPV6) &&
2517                              eth_type != htons(ETH_P_ARP) &&
2518                              eth_type != htons(ETH_P_RARP) &&
2519                              !eth_p_mpls(eth_type)))
2520                                 return -EINVAL;
2521                         eth_type = mpls->mpls_ethertype;
2522                         break;
2523                 }
2524
2525                 case OVS_ACTION_ATTR_POP_MPLS:
2526                         if (vlan_tci & htons(VLAN_TAG_PRESENT) ||
2527                             !eth_p_mpls(eth_type))
2528                                 return -EINVAL;
2529
2530                         /* Disallow subsequent L2.5+ set and mpls_pop actions
2531                          * as there is no check here to ensure that the new
2532                          * eth_type is valid and thus set actions could
2533                          * write off the end of the packet or otherwise
2534                          * corrupt it.
2535                          *
2536                          * Support for these actions is planned using packet
2537                          * recirculation.
2538                          */
2539                         eth_type = htons(0);
2540                         break;
2541
2542                 case OVS_ACTION_ATTR_SET:
2543                         err = validate_set(a, key, sfa,
2544                                            &skip_copy, mac_proto, eth_type,
2545                                            false, log);
2546                         if (err)
2547                                 return err;
2548                         break;
2549
2550                 case OVS_ACTION_ATTR_SET_MASKED:
2551                         err = validate_set(a, key, sfa,
2552                                            &skip_copy, mac_proto, eth_type,
2553                                            true, log);
2554                         if (err)
2555                                 return err;
2556                         break;
2557
2558                 case OVS_ACTION_ATTR_SAMPLE:
2559                         err = validate_and_copy_sample(net, a, key, depth, sfa,
2560                                                        eth_type, vlan_tci, log);
2561                         if (err)
2562                                 return err;
2563                         skip_copy = true;
2564                         break;
2565
2566                 case OVS_ACTION_ATTR_CT:
2567                         err = ovs_ct_copy_action(net, a, key, sfa, log);
2568                         if (err)
2569                                 return err;
2570                         skip_copy = true;
2571                         break;
2572
2573                 case OVS_ACTION_ATTR_PUSH_ETH:
2574                         /* Disallow pushing an Ethernet header if one
2575                          * is already present */
2576                         if (mac_proto != MAC_PROTO_NONE)
2577                                 return -EINVAL;
2578                         mac_proto = MAC_PROTO_NONE;
2579                         break;
2580
2581                 case OVS_ACTION_ATTR_POP_ETH:
2582                         if (mac_proto != MAC_PROTO_ETHERNET)
2583                                 return -EINVAL;
2584                         if (vlan_tci & htons(VLAN_TAG_PRESENT))
2585                                 return -EINVAL;
2586                         mac_proto = MAC_PROTO_ETHERNET;
2587                         break;
2588
2589                 default:
2590                         OVS_NLERR(log, "Unknown Action type %d", type);
2591                         return -EINVAL;
2592                 }
2593                 if (!skip_copy) {
2594                         err = copy_action(a, sfa, log);
2595                         if (err)
2596                                 return err;
2597                 }
2598         }
2599
2600         if (rem > 0)
2601                 return -EINVAL;
2602
2603         return 0;
2604 }
2605
2606 /* 'key' must be the masked key. */
2607 int ovs_nla_copy_actions(struct net *net, const struct nlattr *attr,
2608                          const struct sw_flow_key *key,
2609                          struct sw_flow_actions **sfa, bool log)
2610 {
2611         int err;
2612
2613         *sfa = nla_alloc_flow_actions(nla_len(attr), log);
2614         if (IS_ERR(*sfa))
2615                 return PTR_ERR(*sfa);
2616
2617         (*sfa)->orig_len = nla_len(attr);
2618         err = __ovs_nla_copy_actions(net, attr, key, 0, sfa, key->eth.type,
2619                                      key->eth.vlan.tci, log);
2620         if (err)
2621                 ovs_nla_free_flow_actions(*sfa);
2622
2623         return err;
2624 }
2625
2626 static int sample_action_to_attr(const struct nlattr *attr, struct sk_buff *skb)
2627 {
2628         const struct nlattr *a;
2629         struct nlattr *start;
2630         int err = 0, rem;
2631
2632         start = nla_nest_start(skb, OVS_ACTION_ATTR_SAMPLE);
2633         if (!start)
2634                 return -EMSGSIZE;
2635
2636         nla_for_each_nested(a, attr, rem) {
2637                 int type = nla_type(a);
2638                 struct nlattr *st_sample;
2639
2640                 switch (type) {
2641                 case OVS_SAMPLE_ATTR_PROBABILITY:
2642                         if (nla_put(skb, OVS_SAMPLE_ATTR_PROBABILITY,
2643                                     sizeof(u32), nla_data(a)))
2644                                 return -EMSGSIZE;
2645                         break;
2646                 case OVS_SAMPLE_ATTR_ACTIONS:
2647                         st_sample = nla_nest_start(skb, OVS_SAMPLE_ATTR_ACTIONS);
2648                         if (!st_sample)
2649                                 return -EMSGSIZE;
2650                         err = ovs_nla_put_actions(nla_data(a), nla_len(a), skb);
2651                         if (err)
2652                                 return err;
2653                         nla_nest_end(skb, st_sample);
2654                         break;
2655                 }
2656         }
2657
2658         nla_nest_end(skb, start);
2659         return err;
2660 }
2661
2662 static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
2663 {
2664         const struct nlattr *ovs_key = nla_data(a);
2665         int key_type = nla_type(ovs_key);
2666         struct nlattr *start;
2667         int err;
2668
2669         switch (key_type) {
2670         case OVS_KEY_ATTR_TUNNEL_INFO: {
2671                 struct ovs_tunnel_info *ovs_tun = nla_data(ovs_key);
2672                 struct ip_tunnel_info *tun_info = &ovs_tun->tun_dst->u.tun_info;
2673
2674                 start = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2675                 if (!start)
2676                         return -EMSGSIZE;
2677
2678                 err =  ip_tun_to_nlattr(skb, &tun_info->key,
2679                                         ip_tunnel_info_opts(tun_info),
2680                                         tun_info->options_len,
2681                                         ip_tunnel_info_af(tun_info));
2682                 if (err)
2683                         return err;
2684                 nla_nest_end(skb, start);
2685                 break;
2686         }
2687         default:
2688                 if (nla_put(skb, OVS_ACTION_ATTR_SET, nla_len(a), ovs_key))
2689                         return -EMSGSIZE;
2690                 break;
2691         }
2692
2693         return 0;
2694 }
2695
2696 static int masked_set_action_to_set_action_attr(const struct nlattr *a,
2697                                                 struct sk_buff *skb)
2698 {
2699         const struct nlattr *ovs_key = nla_data(a);
2700         struct nlattr *nla;
2701         size_t key_len = nla_len(ovs_key) / 2;
2702
2703         /* Revert the conversion we did from a non-masked set action to
2704          * masked set action.
2705          */
2706         nla = nla_nest_start(skb, OVS_ACTION_ATTR_SET);
2707         if (!nla)
2708                 return -EMSGSIZE;
2709
2710         if (nla_put(skb, nla_type(ovs_key), key_len, nla_data(ovs_key)))
2711                 return -EMSGSIZE;
2712
2713         nla_nest_end(skb, nla);
2714         return 0;
2715 }
2716
2717 int ovs_nla_put_actions(const struct nlattr *attr, int len, struct sk_buff *skb)
2718 {
2719         const struct nlattr *a;
2720         int rem, err;
2721
2722         nla_for_each_attr(a, attr, len, rem) {
2723                 int type = nla_type(a);
2724
2725                 switch (type) {
2726                 case OVS_ACTION_ATTR_SET:
2727                         err = set_action_to_attr(a, skb);
2728                         if (err)
2729                                 return err;
2730                         break;
2731
2732                 case OVS_ACTION_ATTR_SET_TO_MASKED:
2733                         err = masked_set_action_to_set_action_attr(a, skb);
2734                         if (err)
2735                                 return err;
2736                         break;
2737
2738                 case OVS_ACTION_ATTR_SAMPLE:
2739                         err = sample_action_to_attr(a, skb);
2740                         if (err)
2741                                 return err;
2742                         break;
2743
2744                 case OVS_ACTION_ATTR_CT:
2745                         err = ovs_ct_action_to_attr(nla_data(a), skb);
2746                         if (err)
2747                                 return err;
2748                         break;
2749
2750                 default:
2751                         if (nla_put(skb, type, nla_len(a), nla_data(a)))
2752                                 return -EMSGSIZE;
2753                         break;
2754                 }
2755         }
2756
2757         return 0;
2758 }