include/uapi/linux/openvswitch.h

   1
   2 /*
   3  * Copyright (c) 2007-2013 Nicira, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17  * 02110-1301, USA
  18  */
  19
  20 #ifndef _UAPI__LINUX_OPENVSWITCH_H
  21 #define _UAPI__LINUX_OPENVSWITCH_H 1
  22
  23 #include <linux/types.h>
  24 #include <linux/if_ether.h>
  25
  26 /**
  27  * struct ovs_header - header for OVS Generic Netlink messages.
  28  * @dp_ifindex: ifindex of local port for datapath (0 to make a request not
  29  * specific to a datapath).
  30  *
  31  * Attributes following the header are specific to a particular OVS Generic
  32  * Netlink family, but all of the OVS families use this header.
  33  */
  34
  35 struct ovs_header {
  36         int dp_ifindex;
  37 };
  38
  39 /* Datapaths. */
  40
  41 #define OVS_DATAPATH_FAMILY  "ovs_datapath"
  42 #define OVS_DATAPATH_MCGROUP "ovs_datapath"
  43
  44 /* V2:
  45  *   - API users are expected to provide OVS_DP_ATTR_USER_FEATURES
  46  *     when creating the datapath.
  47  */
  48 #define OVS_DATAPATH_VERSION 2
  49
  50 /* First OVS datapath version to support features */
  51 #define OVS_DP_VER_FEATURES 2
  52
  53 enum ovs_datapath_cmd {
  54         OVS_DP_CMD_UNSPEC,
  55         OVS_DP_CMD_NEW,
  56         OVS_DP_CMD_DEL,
  57         OVS_DP_CMD_GET,
  58         OVS_DP_CMD_SET
  59 };
  60
  61 /**
  62  * enum ovs_datapath_attr - attributes for %OVS_DP_* commands.
  63  * @OVS_DP_ATTR_NAME: Name of the network device that serves as the "local
  64  * port".  This is the name of the network device whose dp_ifindex is given in
  65  * the &struct ovs_header.  Always present in notifications.  Required in
  66  * %OVS_DP_NEW requests.  May be used as an alternative to specifying
  67  * dp_ifindex in other requests (with a dp_ifindex of 0).
  68  * @OVS_DP_ATTR_UPCALL_PID: The Netlink socket in userspace that is initially
  69  * set on the datapath port (for OVS_ACTION_ATTR_MISS).  Only valid on
  70  * %OVS_DP_CMD_NEW requests. A value of zero indicates that upcalls should
  71  * not be sent.
  72  * @OVS_DP_ATTR_STATS: Statistics about packets that have passed through the
  73  * datapath.  Always present in notifications.
  74  * @OVS_DP_ATTR_MEGAFLOW_STATS: Statistics about mega flow masks usage for the
  75  * datapath. Always present in notifications.
  76  *
  77  * These attributes follow the &struct ovs_header within the Generic Netlink
  78  * payload for %OVS_DP_* commands.
  79  */
  80 enum ovs_datapath_attr {
  81         OVS_DP_ATTR_UNSPEC,
  82         OVS_DP_ATTR_NAME,               /* name of dp_ifindex netdev */
  83         OVS_DP_ATTR_UPCALL_PID,         /* Netlink PID to receive upcalls */
  84         OVS_DP_ATTR_STATS,              /* struct ovs_dp_stats */
  85         OVS_DP_ATTR_MEGAFLOW_STATS,     /* struct ovs_dp_megaflow_stats */
  86         OVS_DP_ATTR_USER_FEATURES,      /* OVS_DP_F_*  */
  87         __OVS_DP_ATTR_MAX
  88 };
  89
  90 #define OVS_DP_ATTR_MAX (__OVS_DP_ATTR_MAX - 1)
  91
  92 struct ovs_dp_stats {
  93         __u64 n_hit;             /* Number of flow table matches. */
  94         __u64 n_missed;          /* Number of flow table misses. */
  95         __u64 n_lost;            /* Number of misses not sent to userspace. */
  96         __u64 n_flows;           /* Number of flows present */
  97 };
  98
  99 struct ovs_dp_megaflow_stats {
 100         __u64 n_mask_hit;        /* Number of masks used for flow lookups. */
 101         __u32 n_masks;           /* Number of masks for the datapath. */
 102         __u32 pad0;              /* Pad for future expension. */
 103         __u64 pad1;              /* Pad for future expension. */
 104         __u64 pad2;              /* Pad for future expension. */
 105 };
 106
 107 struct ovs_vport_stats {
 108         __u64   rx_packets;             /* total packets received       */
 109         __u64   tx_packets;             /* total packets transmitted    */
 110         __u64   rx_bytes;               /* total bytes received         */
 111         __u64   tx_bytes;               /* total bytes transmitted      */
 112         __u64   rx_errors;              /* bad packets received         */
 113         __u64   tx_errors;              /* packet transmit problems     */
 114         __u64   rx_dropped;             /* no space in linux buffers    */
 115         __u64   tx_dropped;             /* no space available in linux  */
 116 };
 117
 118 /* Allow last Netlink attribute to be unaligned */
 119 #define OVS_DP_F_UNALIGNED      (1 << 0)
 120
 121 /* Allow datapath to associate multiple Netlink PIDs to each vport */
 122 #define OVS_DP_F_VPORT_PIDS     (1 << 1)
 123
 124 /* Fixed logical ports. */
 125 #define OVSP_LOCAL      ((__u32)0)
 126
 127 /* Packet transfer. */
 128
 129 #define OVS_PACKET_FAMILY "ovs_packet"
 130 #define OVS_PACKET_VERSION 0x1
 131
 132 enum ovs_packet_cmd {
 133         OVS_PACKET_CMD_UNSPEC,
 134
 135         /* Kernel-to-user notifications. */
 136         OVS_PACKET_CMD_MISS,    /* Flow table miss. */
 137         OVS_PACKET_CMD_ACTION,  /* OVS_ACTION_ATTR_USERSPACE action. */
 138
 139         /* Userspace commands. */
 140         OVS_PACKET_CMD_EXECUTE  /* Apply actions to a packet. */
 141 };
 142
 143 /**
 144  * enum ovs_packet_attr - attributes for %OVS_PACKET_* commands.
 145  * @OVS_PACKET_ATTR_PACKET: Present for all notifications.  Contains the entire
 146  * packet as received, from the start of the Ethernet header onward.  For
 147  * %OVS_PACKET_CMD_ACTION, %OVS_PACKET_ATTR_PACKET reflects changes made by
 148  * actions preceding %OVS_ACTION_ATTR_USERSPACE, but %OVS_PACKET_ATTR_KEY is
 149  * the flow key extracted from the packet as originally received.
 150  * @OVS_PACKET_ATTR_KEY: Present for all notifications.  Contains the flow key
 151  * extracted from the packet as nested %OVS_KEY_ATTR_* attributes.  This allows
 152  * userspace to adapt its flow setup strategy by comparing its notion of the
 153  * flow key against the kernel's.
 154  * @OVS_PACKET_ATTR_ACTIONS: Contains actions for the packet.  Used
 155  * for %OVS_PACKET_CMD_EXECUTE.  It has nested %OVS_ACTION_ATTR_* attributes.
 156  * @OVS_PACKET_ATTR_USERDATA: Present for an %OVS_PACKET_CMD_ACTION
 157  * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
 158  * %OVS_USERSPACE_ATTR_USERDATA attribute, with the same length and content
 159  * specified there.
 160  * @OVS_PACKET_ATTR_EGRESS_TUN_KEY: Present for an %OVS_PACKET_CMD_ACTION
 161  * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
 162  * %OVS_USERSPACE_ATTR_EGRESS_TUN_PORT attribute, which is sent only if the
 163  * output port is actually a tunnel port. Contains the output tunnel key
 164  * extracted from the packet as nested %OVS_TUNNEL_KEY_ATTR_* attributes.
 165  *
 166  * These attributes follow the &struct ovs_header within the Generic Netlink
 167  * payload for %OVS_PACKET_* commands.
 168  */
 169 enum ovs_packet_attr {
 170         OVS_PACKET_ATTR_UNSPEC,
 171         OVS_PACKET_ATTR_PACKET,      /* Packet data. */
 172         OVS_PACKET_ATTR_KEY,         /* Nested OVS_KEY_ATTR_* attributes. */
 173         OVS_PACKET_ATTR_ACTIONS,     /* Nested OVS_ACTION_ATTR_* attributes. */
 174         OVS_PACKET_ATTR_USERDATA,    /* OVS_ACTION_ATTR_USERSPACE arg. */
 175         OVS_PACKET_ATTR_EGRESS_TUN_KEY,  /* Nested OVS_TUNNEL_KEY_ATTR_*
 176                                             attributes. */
 177         OVS_PACKET_ATTR_UNUSED1,
 178         OVS_PACKET_ATTR_UNUSED2,
 179         OVS_PACKET_ATTR_PROBE,      /* Packet operation is a feature probe,
 180                                        error logging should be suppressed. */
 181         __OVS_PACKET_ATTR_MAX
 182 };
 183
 184 #define OVS_PACKET_ATTR_MAX (__OVS_PACKET_ATTR_MAX - 1)
 185
 186 /* Virtual ports. */
 187
 188 #define OVS_VPORT_FAMILY  "ovs_vport"
 189 #define OVS_VPORT_MCGROUP "ovs_vport"
 190 #define OVS_VPORT_VERSION 0x1
 191
 192 enum ovs_vport_cmd {
 193         OVS_VPORT_CMD_UNSPEC,
 194         OVS_VPORT_CMD_NEW,
 195         OVS_VPORT_CMD_DEL,
 196         OVS_VPORT_CMD_GET,
 197         OVS_VPORT_CMD_SET
 198 };
 199
 200 enum ovs_vport_type {
 201         OVS_VPORT_TYPE_UNSPEC,
 202         OVS_VPORT_TYPE_NETDEV,   /* network device */
 203         OVS_VPORT_TYPE_INTERNAL, /* network device implemented by datapath */
 204         OVS_VPORT_TYPE_GRE,      /* GRE tunnel. */
 205         OVS_VPORT_TYPE_VXLAN,    /* VXLAN tunnel. */
 206         OVS_VPORT_TYPE_GENEVE,   /* Geneve tunnel. */
 207         __OVS_VPORT_TYPE_MAX
 208 };
 209
 210 #define OVS_VPORT_TYPE_MAX (__OVS_VPORT_TYPE_MAX - 1)
 211
 212 /**
 213  * enum ovs_vport_attr - attributes for %OVS_VPORT_* commands.
 214  * @OVS_VPORT_ATTR_PORT_NO: 32-bit port number within datapath.
 215  * @OVS_VPORT_ATTR_TYPE: 32-bit %OVS_VPORT_TYPE_* constant describing the type
 216  * of vport.
 217  * @OVS_VPORT_ATTR_NAME: Name of vport.  For a vport based on a network device
 218  * this is the name of the network device.  Maximum length %IFNAMSIZ-1 bytes
 219  * plus a null terminator.
 220  * @OVS_VPORT_ATTR_OPTIONS: Vport-specific configuration information.
 221  * @OVS_VPORT_ATTR_UPCALL_PID: The array of Netlink socket pids in userspace
 222  * among which OVS_PACKET_CMD_MISS upcalls will be distributed for packets
 223  * received on this port.  If this is a single-element array of value 0,
 224  * upcalls should not be sent.
 225  * @OVS_VPORT_ATTR_STATS: A &struct ovs_vport_stats giving statistics for
 226  * packets sent or received through the vport.
 227  *
 228  * These attributes follow the &struct ovs_header within the Generic Netlink
 229  * payload for %OVS_VPORT_* commands.
 230  *
 231  * For %OVS_VPORT_CMD_NEW requests, the %OVS_VPORT_ATTR_TYPE and
 232  * %OVS_VPORT_ATTR_NAME attributes are required.  %OVS_VPORT_ATTR_PORT_NO is
 233  * optional; if not specified a free port number is automatically selected.
 234  * Whether %OVS_VPORT_ATTR_OPTIONS is required or optional depends on the type
 235  * of vport.
 236  *
 237  * For other requests, if %OVS_VPORT_ATTR_NAME is specified then it is used to
 238  * look up the vport to operate on; otherwise dp_idx from the &struct
 239  * ovs_header plus %OVS_VPORT_ATTR_PORT_NO determine the vport.
 240  */
 241 enum ovs_vport_attr {
 242         OVS_VPORT_ATTR_UNSPEC,
 243         OVS_VPORT_ATTR_PORT_NO, /* u32 port number within datapath */
 244         OVS_VPORT_ATTR_TYPE,    /* u32 OVS_VPORT_TYPE_* constant. */
 245         OVS_VPORT_ATTR_NAME,    /* string name, up to IFNAMSIZ bytes long */
 246         OVS_VPORT_ATTR_OPTIONS, /* nested attributes, varies by vport type */
 247         OVS_VPORT_ATTR_UPCALL_PID, /* array of u32 Netlink socket PIDs for */
 248                                 /* receiving upcalls */
 249         OVS_VPORT_ATTR_STATS,   /* struct ovs_vport_stats */
 250         __OVS_VPORT_ATTR_MAX
 251 };
 252
 253 #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
 254
 255 enum {
 256         OVS_VXLAN_EXT_UNSPEC,
 257         OVS_VXLAN_EXT_GBP,      /* Flag or __u32 */
 258         __OVS_VXLAN_EXT_MAX,
 259 };
 260
 261 #define OVS_VXLAN_EXT_MAX (__OVS_VXLAN_EXT_MAX - 1)
 262
 263
 264 /* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
 265  */
 266 enum {
 267         OVS_TUNNEL_ATTR_UNSPEC,
 268         OVS_TUNNEL_ATTR_DST_PORT, /* 16-bit UDP port, used by L4 tunnels. */
 269         OVS_TUNNEL_ATTR_EXTENSION,
 270         __OVS_TUNNEL_ATTR_MAX
 271 };
 272
 273 #define OVS_TUNNEL_ATTR_MAX (__OVS_TUNNEL_ATTR_MAX - 1)
 274
 275 /* Flows. */
 276
 277 #define OVS_FLOW_FAMILY  "ovs_flow"
 278 #define OVS_FLOW_MCGROUP "ovs_flow"
 279 #define OVS_FLOW_VERSION 0x1
 280
 281 enum ovs_flow_cmd {
 282         OVS_FLOW_CMD_UNSPEC,
 283         OVS_FLOW_CMD_NEW,
 284         OVS_FLOW_CMD_DEL,
 285         OVS_FLOW_CMD_GET,
 286         OVS_FLOW_CMD_SET
 287 };
 288
 289 struct ovs_flow_stats {
 290         __u64 n_packets;         /* Number of matched packets. */
 291         __u64 n_bytes;           /* Number of matched bytes. */
 292 };
 293
 294 enum ovs_key_attr {
 295         OVS_KEY_ATTR_UNSPEC,
 296         OVS_KEY_ATTR_ENCAP,     /* Nested set of encapsulated attributes. */
 297         OVS_KEY_ATTR_PRIORITY,  /* u32 skb->priority */
 298         OVS_KEY_ATTR_IN_PORT,   /* u32 OVS dp port number */
 299         OVS_KEY_ATTR_ETHERNET,  /* struct ovs_key_ethernet */
 300         OVS_KEY_ATTR_VLAN,      /* be16 VLAN TCI */
 301         OVS_KEY_ATTR_ETHERTYPE, /* be16 Ethernet type */
 302         OVS_KEY_ATTR_IPV4,      /* struct ovs_key_ipv4 */
 303         OVS_KEY_ATTR_IPV6,      /* struct ovs_key_ipv6 */
 304         OVS_KEY_ATTR_TCP,       /* struct ovs_key_tcp */
 305         OVS_KEY_ATTR_UDP,       /* struct ovs_key_udp */
 306         OVS_KEY_ATTR_ICMP,      /* struct ovs_key_icmp */
 307         OVS_KEY_ATTR_ICMPV6,    /* struct ovs_key_icmpv6 */
 308         OVS_KEY_ATTR_ARP,       /* struct ovs_key_arp */
 309         OVS_KEY_ATTR_ND,        /* struct ovs_key_nd */
 310         OVS_KEY_ATTR_SKB_MARK,  /* u32 skb mark */
 311         OVS_KEY_ATTR_TUNNEL,    /* Nested set of ovs_tunnel attributes */
 312         OVS_KEY_ATTR_SCTP,      /* struct ovs_key_sctp */
 313         OVS_KEY_ATTR_TCP_FLAGS, /* be16 TCP flags. */
 314         OVS_KEY_ATTR_DP_HASH,      /* u32 hash value. Value 0 indicates the hash
 315                                    is not computed by the datapath. */
 316         OVS_KEY_ATTR_RECIRC_ID, /* u32 recirc id */
 317         OVS_KEY_ATTR_MPLS,      /* array of struct ovs_key_mpls.
 318                                  * The implementation may restrict
 319                                  * the accepted length of the array. */
 320
 321 #ifdef __KERNEL__
 322         OVS_KEY_ATTR_TUNNEL_INFO,  /* struct ovs_tunnel_info */
 323 #endif
 324         __OVS_KEY_ATTR_MAX
 325 };
 326
 327 #define OVS_KEY_ATTR_MAX (__OVS_KEY_ATTR_MAX - 1)
 328
 329 enum ovs_tunnel_key_attr {
 330         OVS_TUNNEL_KEY_ATTR_ID,                 /* be64 Tunnel ID */
 331         OVS_TUNNEL_KEY_ATTR_IPV4_SRC,           /* be32 src IP address. */
 332         OVS_TUNNEL_KEY_ATTR_IPV4_DST,           /* be32 dst IP address. */
 333         OVS_TUNNEL_KEY_ATTR_TOS,                /* u8 Tunnel IP ToS. */
 334         OVS_TUNNEL_KEY_ATTR_TTL,                /* u8 Tunnel IP TTL. */
 335         OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT,      /* No argument, set DF. */
 336         OVS_TUNNEL_KEY_ATTR_CSUM,               /* No argument. CSUM packet. */
 337         OVS_TUNNEL_KEY_ATTR_OAM,                /* No argument. OAM frame.  */
 338         OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,        /* Array of Geneve options. */
 339         OVS_TUNNEL_KEY_ATTR_TP_SRC,             /* be16 src Transport Port. */
 340         OVS_TUNNEL_KEY_ATTR_TP_DST,             /* be16 dst Transport Port. */
 341         OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS,         /* Nested OVS_VXLAN_EXT_* */
 342         __OVS_TUNNEL_KEY_ATTR_MAX
 343 };
 344
 345 #define OVS_TUNNEL_KEY_ATTR_MAX (__OVS_TUNNEL_KEY_ATTR_MAX - 1)
 346
 347 /**
 348  * enum ovs_frag_type - IPv4 and IPv6 fragment type
 349  * @OVS_FRAG_TYPE_NONE: Packet is not a fragment.
 350  * @OVS_FRAG_TYPE_FIRST: Packet is a fragment with offset 0.
 351  * @OVS_FRAG_TYPE_LATER: Packet is a fragment with nonzero offset.
 352  *
 353  * Used as the @ipv4_frag in &struct ovs_key_ipv4 and as @ipv6_frag &struct
 354  * ovs_key_ipv6.
 355  */
 356 enum ovs_frag_type {
 357         OVS_FRAG_TYPE_NONE,
 358         OVS_FRAG_TYPE_FIRST,
 359         OVS_FRAG_TYPE_LATER,
 360         __OVS_FRAG_TYPE_MAX
 361 };
 362
 363 #define OVS_FRAG_TYPE_MAX (__OVS_FRAG_TYPE_MAX - 1)
 364
 365 struct ovs_key_ethernet {
 366         __u8     eth_src[ETH_ALEN];
 367         __u8     eth_dst[ETH_ALEN];
 368 };
 369
 370 struct ovs_key_mpls {
 371         __be32 mpls_lse;
 372 };
 373
 374 struct ovs_key_ipv4 {
 375         __be32 ipv4_src;
 376         __be32 ipv4_dst;
 377         __u8   ipv4_proto;
 378         __u8   ipv4_tos;
 379         __u8   ipv4_ttl;
 380         __u8   ipv4_frag;       /* One of OVS_FRAG_TYPE_*. */
 381 };
 382
 383 struct ovs_key_ipv6 {
 384         __be32 ipv6_src[4];
 385         __be32 ipv6_dst[4];
 386         __be32 ipv6_label;      /* 20-bits in least-significant bits. */
 387         __u8   ipv6_proto;
 388         __u8   ipv6_tclass;
 389         __u8   ipv6_hlimit;
 390         __u8   ipv6_frag;       /* One of OVS_FRAG_TYPE_*. */
 391 };
 392
 393 struct ovs_key_tcp {
 394         __be16 tcp_src;
 395         __be16 tcp_dst;
 396 };
 397
 398 struct ovs_key_udp {
 399         __be16 udp_src;
 400         __be16 udp_dst;
 401 };
 402
 403 struct ovs_key_sctp {
 404         __be16 sctp_src;
 405         __be16 sctp_dst;
 406 };
 407
 408 struct ovs_key_icmp {
 409         __u8 icmp_type;
 410         __u8 icmp_code;
 411 };
 412
 413 struct ovs_key_icmpv6 {
 414         __u8 icmpv6_type;
 415         __u8 icmpv6_code;
 416 };
 417
 418 struct ovs_key_arp {
 419         __be32 arp_sip;
 420         __be32 arp_tip;
 421         __be16 arp_op;
 422         __u8   arp_sha[ETH_ALEN];
 423         __u8   arp_tha[ETH_ALEN];
 424 };
 425
 426 struct ovs_key_nd {
 427         __be32  nd_target[4];
 428         __u8    nd_sll[ETH_ALEN];
 429         __u8    nd_tll[ETH_ALEN];
 430 };
 431
 432 /**
 433  * enum ovs_flow_attr - attributes for %OVS_FLOW_* commands.
 434  * @OVS_FLOW_ATTR_KEY: Nested %OVS_KEY_ATTR_* attributes specifying the flow
 435  * key.  Always present in notifications.  Required for all requests (except
 436  * dumps).
 437  * @OVS_FLOW_ATTR_ACTIONS: Nested %OVS_ACTION_ATTR_* attributes specifying
 438  * the actions to take for packets that match the key.  Always present in
 439  * notifications.  Required for %OVS_FLOW_CMD_NEW requests, optional for
 440  * %OVS_FLOW_CMD_SET requests.  An %OVS_FLOW_CMD_SET without
 441  * %OVS_FLOW_ATTR_ACTIONS will not modify the actions.  To clear the actions,
 442  * an %OVS_FLOW_ATTR_ACTIONS without any nested attributes must be given.
 443  * @OVS_FLOW_ATTR_STATS: &struct ovs_flow_stats giving statistics for this
 444  * flow.  Present in notifications if the stats would be nonzero.  Ignored in
 445  * requests.
 446  * @OVS_FLOW_ATTR_TCP_FLAGS: An 8-bit value giving the OR'd value of all of the
 447  * TCP flags seen on packets in this flow.  Only present in notifications for
 448  * TCP flows, and only if it would be nonzero.  Ignored in requests.
 449  * @OVS_FLOW_ATTR_USED: A 64-bit integer giving the time, in milliseconds on
 450  * the system monotonic clock, at which a packet was last processed for this
 451  * flow.  Only present in notifications if a packet has been processed for this
 452  * flow.  Ignored in requests.
 453  * @OVS_FLOW_ATTR_CLEAR: If present in a %OVS_FLOW_CMD_SET request, clears the
 454  * last-used time, accumulated TCP flags, and statistics for this flow.
 455  * Otherwise ignored in requests.  Never present in notifications.
 456  * @OVS_FLOW_ATTR_MASK: Nested %OVS_KEY_ATTR_* attributes specifying the
 457  * mask bits for wildcarded flow match. Mask bit value '1' specifies exact
 458  * match with corresponding flow key bit, while mask bit value '0' specifies
 459  * a wildcarded match. Omitting attribute is treated as wildcarding all
 460  * corresponding fields. Optional for all requests. If not present,
 461  * all flow key bits are exact match bits.
 462  * @OVS_FLOW_ATTR_UFID: A value between 1-16 octets specifying a unique
 463  * identifier for the flow. Causes the flow to be indexed by this value rather
 464  * than the value of the %OVS_FLOW_ATTR_KEY attribute. Optional for all
 465  * requests. Present in notifications if the flow was created with this
 466  * attribute.
 467  * @OVS_FLOW_ATTR_UFID_FLAGS: A 32-bit value of OR'd %OVS_UFID_F_*
 468  * flags that provide alternative semantics for flow installation and
 469  * retrieval. Optional for all requests.
 470  *
 471  * These attributes follow the &struct ovs_header within the Generic Netlink
 472  * payload for %OVS_FLOW_* commands.
 473  */
 474 enum ovs_flow_attr {
 475         OVS_FLOW_ATTR_UNSPEC,
 476         OVS_FLOW_ATTR_KEY,       /* Sequence of OVS_KEY_ATTR_* attributes. */
 477         OVS_FLOW_ATTR_ACTIONS,   /* Nested OVS_ACTION_ATTR_* attributes. */
 478         OVS_FLOW_ATTR_STATS,     /* struct ovs_flow_stats. */
 479         OVS_FLOW_ATTR_TCP_FLAGS, /* 8-bit OR'd TCP flags. */
 480         OVS_FLOW_ATTR_USED,      /* u64 msecs last used in monotonic time. */
 481         OVS_FLOW_ATTR_CLEAR,     /* Flag to clear stats, tcp_flags, used. */
 482         OVS_FLOW_ATTR_MASK,      /* Sequence of OVS_KEY_ATTR_* attributes. */
 483         OVS_FLOW_ATTR_PROBE,     /* Flow operation is a feature probe, error
 484                                   * logging should be suppressed. */
 485         OVS_FLOW_ATTR_UFID,      /* Variable length unique flow identifier. */
 486         OVS_FLOW_ATTR_UFID_FLAGS,/* u32 of OVS_UFID_F_*. */
 487         __OVS_FLOW_ATTR_MAX
 488 };
 489
 490 #define OVS_FLOW_ATTR_MAX (__OVS_FLOW_ATTR_MAX - 1)
 491
 492 /**
 493  * Omit attributes for notifications.
 494  *
 495  * If a datapath request contains an %OVS_UFID_F_OMIT_* flag, then the datapath
 496  * may omit the corresponding %OVS_FLOW_ATTR_* from the response.
 497  */
 498 #define OVS_UFID_F_OMIT_KEY      (1 << 0)
 499 #define OVS_UFID_F_OMIT_MASK     (1 << 1)
 500 #define OVS_UFID_F_OMIT_ACTIONS  (1 << 2)
 501
 502 /**
 503  * enum ovs_sample_attr - Attributes for %OVS_ACTION_ATTR_SAMPLE action.
 504  * @OVS_SAMPLE_ATTR_PROBABILITY: 32-bit fraction of packets to sample with
 505  * @OVS_ACTION_ATTR_SAMPLE.  A value of 0 samples no packets, a value of
 506  * %UINT32_MAX samples all packets and intermediate values sample intermediate
 507  * fractions of packets.
 508  * @OVS_SAMPLE_ATTR_ACTIONS: Set of actions to execute in sampling event.
 509  * Actions are passed as nested attributes.
 510  *
 511  * Executes the specified actions with the given probability on a per-packet
 512  * basis.
 513  */
 514 enum ovs_sample_attr {
 515         OVS_SAMPLE_ATTR_UNSPEC,
 516         OVS_SAMPLE_ATTR_PROBABILITY, /* u32 number */
 517         OVS_SAMPLE_ATTR_ACTIONS,     /* Nested OVS_ACTION_ATTR_* attributes. */
 518         __OVS_SAMPLE_ATTR_MAX,
 519 };
 520
 521 #define OVS_SAMPLE_ATTR_MAX (__OVS_SAMPLE_ATTR_MAX - 1)
 522
 523 /**
 524  * enum ovs_userspace_attr - Attributes for %OVS_ACTION_ATTR_USERSPACE action.
 525  * @OVS_USERSPACE_ATTR_PID: u32 Netlink PID to which the %OVS_PACKET_CMD_ACTION
 526  * message should be sent.  Required.
 527  * @OVS_USERSPACE_ATTR_USERDATA: If present, its variable-length argument is
 528  * copied to the %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA.
 529  * @OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: If present, u32 output port to get
 530  * tunnel info.
 531  */
 532 enum ovs_userspace_attr {
 533         OVS_USERSPACE_ATTR_UNSPEC,
 534         OVS_USERSPACE_ATTR_PID,       /* u32 Netlink PID to receive upcalls. */
 535         OVS_USERSPACE_ATTR_USERDATA,  /* Optional user-specified cookie. */
 536         OVS_USERSPACE_ATTR_EGRESS_TUN_PORT,  /* Optional, u32 output port
 537                                               * to get tunnel info. */
 538         __OVS_USERSPACE_ATTR_MAX
 539 };
 540
 541 #define OVS_USERSPACE_ATTR_MAX (__OVS_USERSPACE_ATTR_MAX - 1)
 542
 543 /**
 544  * struct ovs_action_push_mpls - %OVS_ACTION_ATTR_PUSH_MPLS action argument.
 545  * @mpls_lse: MPLS label stack entry to push.
 546  * @mpls_ethertype: Ethertype to set in the encapsulating ethernet frame.
 547  *
 548  * The only values @mpls_ethertype should ever be given are %ETH_P_MPLS_UC and
 549  * %ETH_P_MPLS_MC, indicating MPLS unicast or multicast. Other are rejected.
 550  */
 551 struct ovs_action_push_mpls {
 552         __be32 mpls_lse;
 553         __be16 mpls_ethertype; /* Either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC */
 554 };
 555
 556 /**
 557  * struct ovs_action_push_vlan - %OVS_ACTION_ATTR_PUSH_VLAN action argument.
 558  * @vlan_tpid: Tag protocol identifier (TPID) to push.
 559  * @vlan_tci: Tag control identifier (TCI) to push.  The CFI bit must be set
 560  * (but it will not be set in the 802.1Q header that is pushed).
 561  *
 562  * The @vlan_tpid value is typically %ETH_P_8021Q.  The only acceptable TPID
 563  * values are those that the kernel module also parses as 802.1Q headers, to
 564  * prevent %OVS_ACTION_ATTR_PUSH_VLAN followed by %OVS_ACTION_ATTR_POP_VLAN
 565  * from having surprising results.
 566  */
 567 struct ovs_action_push_vlan {
 568         __be16 vlan_tpid;       /* 802.1Q TPID. */
 569         __be16 vlan_tci;        /* 802.1Q TCI (VLAN ID and priority). */
 570 };
 571
 572 /* Data path hash algorithm for computing Datapath hash.
 573  *
 574  * The algorithm type only specifies the fields in a flow
 575  * will be used as part of the hash. Each datapath is free
 576  * to use its own hash algorithm. The hash value will be
 577  * opaque to the user space daemon.
 578  */
 579 enum ovs_hash_alg {
 580         OVS_HASH_ALG_L4,
 581 };
 582
 583 /*
 584  * struct ovs_action_hash - %OVS_ACTION_ATTR_HASH action argument.
 585  * @hash_alg: Algorithm used to compute hash prior to recirculation.
 586  * @hash_basis: basis used for computing hash.
 587  */
 588 struct ovs_action_hash {
 589         uint32_t  hash_alg;     /* One of ovs_hash_alg. */
 590         uint32_t  hash_basis;
 591 };
 592
 593 /**
 594  * enum ovs_action_attr - Action types.
 595  *
 596  * @OVS_ACTION_ATTR_OUTPUT: Output packet to port.
 597  * @OVS_ACTION_ATTR_USERSPACE: Send packet to userspace according to nested
 598  * %OVS_USERSPACE_ATTR_* attributes.
 599  * @OVS_ACTION_ATTR_SET: Replaces the contents of an existing header.  The
 600  * single nested %OVS_KEY_ATTR_* attribute specifies a header to modify and its
 601  * value.
 602  * @OVS_ACTION_ATTR_SET_MASKED: Replaces the contents of an existing header.  A
 603  * nested %OVS_KEY_ATTR_* attribute specifies a header to modify, its value,
 604  * and a mask.  For every bit set in the mask, the corresponding bit value
 605  * is copied from the value to the packet header field, rest of the bits are
 606  * left unchanged.  The non-masked value bits must be passed in as zeroes.
 607  * Masking is not supported for the %OVS_KEY_ATTR_TUNNEL attribute.
 608  * @OVS_ACTION_ATTR_PUSH_VLAN: Push a new outermost 802.1Q header onto the
 609  * packet.
 610  * @OVS_ACTION_ATTR_POP_VLAN: Pop the outermost 802.1Q header off the packet.
 611  * @OVS_ACTION_ATTR_SAMPLE: Probabilitically executes actions, as specified in
 612  * the nested %OVS_SAMPLE_ATTR_* attributes.
 613  * @OVS_ACTION_ATTR_PUSH_MPLS: Push a new MPLS label stack entry onto the
 614  * top of the packets MPLS label stack.  Set the ethertype of the
 615  * encapsulating frame to either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC to
 616  * indicate the new packet contents.
 617  * @OVS_ACTION_ATTR_POP_MPLS: Pop an MPLS label stack entry off of the
 618  * packet's MPLS label stack.  Set the encapsulating frame's ethertype to
 619  * indicate the new packet contents. This could potentially still be
 620  * %ETH_P_MPLS if the resulting MPLS label stack is not empty.  If there
 621  * is no MPLS label stack, as determined by ethertype, no action is taken.
 622  *
 623  * Only a single header can be set with a single %OVS_ACTION_ATTR_SET.  Not all
 624  * fields within a header are modifiable, e.g. the IPv4 protocol and fragment
 625  * type may not be changed.
 626  *
 627  * @OVS_ACTION_ATTR_SET_TO_MASKED: Kernel internal masked set action translated
 628  * from the @OVS_ACTION_ATTR_SET.
 629  */
 630
 631 enum ovs_action_attr {
 632         OVS_ACTION_ATTR_UNSPEC,
 633         OVS_ACTION_ATTR_OUTPUT,       /* u32 port number. */
 634         OVS_ACTION_ATTR_USERSPACE,    /* Nested OVS_USERSPACE_ATTR_*. */
 635         OVS_ACTION_ATTR_SET,          /* One nested OVS_KEY_ATTR_*. */
 636         OVS_ACTION_ATTR_PUSH_VLAN,    /* struct ovs_action_push_vlan. */
 637         OVS_ACTION_ATTR_POP_VLAN,     /* No argument. */
 638         OVS_ACTION_ATTR_SAMPLE,       /* Nested OVS_SAMPLE_ATTR_*. */
 639         OVS_ACTION_ATTR_RECIRC,       /* u32 recirc_id. */
 640         OVS_ACTION_ATTR_HASH,         /* struct ovs_action_hash. */
 641         OVS_ACTION_ATTR_PUSH_MPLS,    /* struct ovs_action_push_mpls. */
 642         OVS_ACTION_ATTR_POP_MPLS,     /* __be16 ethertype. */
 643         OVS_ACTION_ATTR_SET_MASKED,   /* One nested OVS_KEY_ATTR_* including
 644                                        * data immediately followed by a mask.
 645                                        * The data must be zero for the unmasked
 646                                        * bits. */
 647
 648         __OVS_ACTION_ATTR_MAX,        /* Nothing past this will be accepted
 649                                        * from userspace. */
 650
 651 #ifdef __KERNEL__
 652         OVS_ACTION_ATTR_SET_TO_MASKED, /* Kernel module internal masked
 653                                         * set action converted from
 654                                         * OVS_ACTION_ATTR_SET. */
 655 #endif
 656 };
 657
 658 #define OVS_ACTION_ATTR_MAX (__OVS_ACTION_ATTR_MAX - 1)
 659
 660 #endif /* _LINUX_OPENVSWITCH_H */