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  *
 161  * These attributes follow the &struct ovs_header within the Generic Netlink
 162  * payload for %OVS_PACKET_* commands.
 163  */
 164 enum ovs_packet_attr {
 165         OVS_PACKET_ATTR_UNSPEC,
 166         OVS_PACKET_ATTR_PACKET,      /* Packet data. */
 167         OVS_PACKET_ATTR_KEY,         /* Nested OVS_KEY_ATTR_* attributes. */
 168         OVS_PACKET_ATTR_ACTIONS,     /* Nested OVS_ACTION_ATTR_* attributes. */
 169         OVS_PACKET_ATTR_USERDATA,    /* OVS_ACTION_ATTR_USERSPACE arg. */
 170         __OVS_PACKET_ATTR_MAX
 171 };
 172
 173 #define OVS_PACKET_ATTR_MAX (__OVS_PACKET_ATTR_MAX - 1)
 174
 175 /* Virtual ports. */
 176
 177 #define OVS_VPORT_FAMILY  "ovs_vport"
 178 #define OVS_VPORT_MCGROUP "ovs_vport"
 179 #define OVS_VPORT_VERSION 0x1
 180
 181 enum ovs_vport_cmd {
 182         OVS_VPORT_CMD_UNSPEC,
 183         OVS_VPORT_CMD_NEW,
 184         OVS_VPORT_CMD_DEL,
 185         OVS_VPORT_CMD_GET,
 186         OVS_VPORT_CMD_SET
 187 };
 188
 189 enum ovs_vport_type {
 190         OVS_VPORT_TYPE_UNSPEC,
 191         OVS_VPORT_TYPE_NETDEV,   /* network device */
 192         OVS_VPORT_TYPE_INTERNAL, /* network device implemented by datapath */
 193         OVS_VPORT_TYPE_GRE,      /* GRE tunnel. */
 194         OVS_VPORT_TYPE_VXLAN,    /* VXLAN tunnel. */
 195         OVS_VPORT_TYPE_GENEVE,   /* Geneve tunnel. */
 196         __OVS_VPORT_TYPE_MAX
 197 };
 198
 199 #define OVS_VPORT_TYPE_MAX (__OVS_VPORT_TYPE_MAX - 1)
 200
 201 /**
 202  * enum ovs_vport_attr - attributes for %OVS_VPORT_* commands.
 203  * @OVS_VPORT_ATTR_PORT_NO: 32-bit port number within datapath.
 204  * @OVS_VPORT_ATTR_TYPE: 32-bit %OVS_VPORT_TYPE_* constant describing the type
 205  * of vport.
 206  * @OVS_VPORT_ATTR_NAME: Name of vport.  For a vport based on a network device
 207  * this is the name of the network device.  Maximum length %IFNAMSIZ-1 bytes
 208  * plus a null terminator.
 209  * @OVS_VPORT_ATTR_OPTIONS: Vport-specific configuration information.
 210  * @OVS_VPORT_ATTR_UPCALL_PID: The array of Netlink socket pids in userspace
 211  * among which OVS_PACKET_CMD_MISS upcalls will be distributed for packets
 212  * received on this port.  If this is a single-element array of value 0,
 213  * upcalls should not be sent.
 214  * @OVS_VPORT_ATTR_STATS: A &struct ovs_vport_stats giving statistics for
 215  * packets sent or received through the vport.
 216  *
 217  * These attributes follow the &struct ovs_header within the Generic Netlink
 218  * payload for %OVS_VPORT_* commands.
 219  *
 220  * For %OVS_VPORT_CMD_NEW requests, the %OVS_VPORT_ATTR_TYPE and
 221  * %OVS_VPORT_ATTR_NAME attributes are required.  %OVS_VPORT_ATTR_PORT_NO is
 222  * optional; if not specified a free port number is automatically selected.
 223  * Whether %OVS_VPORT_ATTR_OPTIONS is required or optional depends on the type
 224  * of vport.
 225  *
 226  * For other requests, if %OVS_VPORT_ATTR_NAME is specified then it is used to
 227  * look up the vport to operate on; otherwise dp_idx from the &struct
 228  * ovs_header plus %OVS_VPORT_ATTR_PORT_NO determine the vport.
 229  */
 230 enum ovs_vport_attr {
 231         OVS_VPORT_ATTR_UNSPEC,
 232         OVS_VPORT_ATTR_PORT_NO, /* u32 port number within datapath */
 233         OVS_VPORT_ATTR_TYPE,    /* u32 OVS_VPORT_TYPE_* constant. */
 234         OVS_VPORT_ATTR_NAME,    /* string name, up to IFNAMSIZ bytes long */
 235         OVS_VPORT_ATTR_OPTIONS, /* nested attributes, varies by vport type */
 236         OVS_VPORT_ATTR_UPCALL_PID, /* array of u32 Netlink socket PIDs for */
 237                                 /* receiving upcalls */
 238         OVS_VPORT_ATTR_STATS,   /* struct ovs_vport_stats */
 239         __OVS_VPORT_ATTR_MAX
 240 };
 241
 242 #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
 243
 244 /* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
 245  */
 246 enum {
 247         OVS_TUNNEL_ATTR_UNSPEC,
 248         OVS_TUNNEL_ATTR_DST_PORT, /* 16-bit UDP port, used by L4 tunnels. */
 249         __OVS_TUNNEL_ATTR_MAX
 250 };
 251
 252 #define OVS_TUNNEL_ATTR_MAX (__OVS_TUNNEL_ATTR_MAX - 1)
 253
 254 /* Flows. */
 255
 256 #define OVS_FLOW_FAMILY  "ovs_flow"
 257 #define OVS_FLOW_MCGROUP "ovs_flow"
 258 #define OVS_FLOW_VERSION 0x1
 259
 260 enum ovs_flow_cmd {
 261         OVS_FLOW_CMD_UNSPEC,
 262         OVS_FLOW_CMD_NEW,
 263         OVS_FLOW_CMD_DEL,
 264         OVS_FLOW_CMD_GET,
 265         OVS_FLOW_CMD_SET
 266 };
 267
 268 struct ovs_flow_stats {
 269         __u64 n_packets;         /* Number of matched packets. */
 270         __u64 n_bytes;           /* Number of matched bytes. */
 271 };
 272
 273 enum ovs_key_attr {
 274         OVS_KEY_ATTR_UNSPEC,
 275         OVS_KEY_ATTR_ENCAP,     /* Nested set of encapsulated attributes. */
 276         OVS_KEY_ATTR_PRIORITY,  /* u32 skb->priority */
 277         OVS_KEY_ATTR_IN_PORT,   /* u32 OVS dp port number */
 278         OVS_KEY_ATTR_ETHERNET,  /* struct ovs_key_ethernet */
 279         OVS_KEY_ATTR_VLAN,      /* be16 VLAN TCI */
 280         OVS_KEY_ATTR_ETHERTYPE, /* be16 Ethernet type */
 281         OVS_KEY_ATTR_IPV4,      /* struct ovs_key_ipv4 */
 282         OVS_KEY_ATTR_IPV6,      /* struct ovs_key_ipv6 */
 283         OVS_KEY_ATTR_TCP,       /* struct ovs_key_tcp */
 284         OVS_KEY_ATTR_UDP,       /* struct ovs_key_udp */
 285         OVS_KEY_ATTR_ICMP,      /* struct ovs_key_icmp */
 286         OVS_KEY_ATTR_ICMPV6,    /* struct ovs_key_icmpv6 */
 287         OVS_KEY_ATTR_ARP,       /* struct ovs_key_arp */
 288         OVS_KEY_ATTR_ND,        /* struct ovs_key_nd */
 289         OVS_KEY_ATTR_SKB_MARK,  /* u32 skb mark */
 290         OVS_KEY_ATTR_TUNNEL,    /* Nested set of ovs_tunnel attributes */
 291         OVS_KEY_ATTR_SCTP,      /* struct ovs_key_sctp */
 292         OVS_KEY_ATTR_TCP_FLAGS, /* be16 TCP flags. */
 293         OVS_KEY_ATTR_DP_HASH,      /* u32 hash value. Value 0 indicates the hash
 294                                    is not computed by the datapath. */
 295         OVS_KEY_ATTR_RECIRC_ID, /* u32 recirc id */
 296
 297 #ifdef __KERNEL__
 298         OVS_KEY_ATTR_TUNNEL_INFO,  /* struct ovs_tunnel_info */
 299 #endif
 300         __OVS_KEY_ATTR_MAX
 301 };
 302
 303 #define OVS_KEY_ATTR_MAX (__OVS_KEY_ATTR_MAX - 1)
 304
 305 enum ovs_tunnel_key_attr {
 306         OVS_TUNNEL_KEY_ATTR_ID,                 /* be64 Tunnel ID */
 307         OVS_TUNNEL_KEY_ATTR_IPV4_SRC,           /* be32 src IP address. */
 308         OVS_TUNNEL_KEY_ATTR_IPV4_DST,           /* be32 dst IP address. */
 309         OVS_TUNNEL_KEY_ATTR_TOS,                /* u8 Tunnel IP ToS. */
 310         OVS_TUNNEL_KEY_ATTR_TTL,                /* u8 Tunnel IP TTL. */
 311         OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT,      /* No argument, set DF. */
 312         OVS_TUNNEL_KEY_ATTR_CSUM,               /* No argument. CSUM packet. */
 313         OVS_TUNNEL_KEY_ATTR_OAM,                /* No argument. OAM frame.  */
 314         OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS,        /* Array of Geneve options. */
 315         __OVS_TUNNEL_KEY_ATTR_MAX
 316 };
 317
 318 #define OVS_TUNNEL_KEY_ATTR_MAX (__OVS_TUNNEL_KEY_ATTR_MAX - 1)
 319
 320 /**
 321  * enum ovs_frag_type - IPv4 and IPv6 fragment type
 322  * @OVS_FRAG_TYPE_NONE: Packet is not a fragment.
 323  * @OVS_FRAG_TYPE_FIRST: Packet is a fragment with offset 0.
 324  * @OVS_FRAG_TYPE_LATER: Packet is a fragment with nonzero offset.
 325  *
 326  * Used as the @ipv4_frag in &struct ovs_key_ipv4 and as @ipv6_frag &struct
 327  * ovs_key_ipv6.
 328  */
 329 enum ovs_frag_type {
 330         OVS_FRAG_TYPE_NONE,
 331         OVS_FRAG_TYPE_FIRST,
 332         OVS_FRAG_TYPE_LATER,
 333         __OVS_FRAG_TYPE_MAX
 334 };
 335
 336 #define OVS_FRAG_TYPE_MAX (__OVS_FRAG_TYPE_MAX - 1)
 337
 338 struct ovs_key_ethernet {
 339         __u8     eth_src[ETH_ALEN];
 340         __u8     eth_dst[ETH_ALEN];
 341 };
 342
 343 struct ovs_key_ipv4 {
 344         __be32 ipv4_src;
 345         __be32 ipv4_dst;
 346         __u8   ipv4_proto;
 347         __u8   ipv4_tos;
 348         __u8   ipv4_ttl;
 349         __u8   ipv4_frag;       /* One of OVS_FRAG_TYPE_*. */
 350 };
 351
 352 struct ovs_key_ipv6 {
 353         __be32 ipv6_src[4];
 354         __be32 ipv6_dst[4];
 355         __be32 ipv6_label;      /* 20-bits in least-significant bits. */
 356         __u8   ipv6_proto;
 357         __u8   ipv6_tclass;
 358         __u8   ipv6_hlimit;
 359         __u8   ipv6_frag;       /* One of OVS_FRAG_TYPE_*. */
 360 };
 361
 362 struct ovs_key_tcp {
 363         __be16 tcp_src;
 364         __be16 tcp_dst;
 365 };
 366
 367 struct ovs_key_udp {
 368         __be16 udp_src;
 369         __be16 udp_dst;
 370 };
 371
 372 struct ovs_key_sctp {
 373         __be16 sctp_src;
 374         __be16 sctp_dst;
 375 };
 376
 377 struct ovs_key_icmp {
 378         __u8 icmp_type;
 379         __u8 icmp_code;
 380 };
 381
 382 struct ovs_key_icmpv6 {
 383         __u8 icmpv6_type;
 384         __u8 icmpv6_code;
 385 };
 386
 387 struct ovs_key_arp {
 388         __be32 arp_sip;
 389         __be32 arp_tip;
 390         __be16 arp_op;
 391         __u8   arp_sha[ETH_ALEN];
 392         __u8   arp_tha[ETH_ALEN];
 393 };
 394
 395 struct ovs_key_nd {
 396         __u32 nd_target[4];
 397         __u8  nd_sll[ETH_ALEN];
 398         __u8  nd_tll[ETH_ALEN];
 399 };
 400
 401 /**
 402  * enum ovs_flow_attr - attributes for %OVS_FLOW_* commands.
 403  * @OVS_FLOW_ATTR_KEY: Nested %OVS_KEY_ATTR_* attributes specifying the flow
 404  * key.  Always present in notifications.  Required for all requests (except
 405  * dumps).
 406  * @OVS_FLOW_ATTR_ACTIONS: Nested %OVS_ACTION_ATTR_* attributes specifying
 407  * the actions to take for packets that match the key.  Always present in
 408  * notifications.  Required for %OVS_FLOW_CMD_NEW requests, optional for
 409  * %OVS_FLOW_CMD_SET requests.  An %OVS_FLOW_CMD_SET without
 410  * %OVS_FLOW_ATTR_ACTIONS will not modify the actions.  To clear the actions,
 411  * an %OVS_FLOW_ATTR_ACTIONS without any nested attributes must be given.
 412  * @OVS_FLOW_ATTR_STATS: &struct ovs_flow_stats giving statistics for this
 413  * flow.  Present in notifications if the stats would be nonzero.  Ignored in
 414  * requests.
 415  * @OVS_FLOW_ATTR_TCP_FLAGS: An 8-bit value giving the OR'd value of all of the
 416  * TCP flags seen on packets in this flow.  Only present in notifications for
 417  * TCP flows, and only if it would be nonzero.  Ignored in requests.
 418  * @OVS_FLOW_ATTR_USED: A 64-bit integer giving the time, in milliseconds on
 419  * the system monotonic clock, at which a packet was last processed for this
 420  * flow.  Only present in notifications if a packet has been processed for this
 421  * flow.  Ignored in requests.
 422  * @OVS_FLOW_ATTR_CLEAR: If present in a %OVS_FLOW_CMD_SET request, clears the
 423  * last-used time, accumulated TCP flags, and statistics for this flow.
 424  * Otherwise ignored in requests.  Never present in notifications.
 425  * @OVS_FLOW_ATTR_MASK: Nested %OVS_KEY_ATTR_* attributes specifying the
 426  * mask bits for wildcarded flow match. Mask bit value '1' specifies exact
 427  * match with corresponding flow key bit, while mask bit value '0' specifies
 428  * a wildcarded match. Omitting attribute is treated as wildcarding all
 429  * corresponding fields. Optional for all requests. If not present,
 430  * all flow key bits are exact match bits.
 431  *
 432  * These attributes follow the &struct ovs_header within the Generic Netlink
 433  * payload for %OVS_FLOW_* commands.
 434  */
 435 enum ovs_flow_attr {
 436         OVS_FLOW_ATTR_UNSPEC,
 437         OVS_FLOW_ATTR_KEY,       /* Sequence of OVS_KEY_ATTR_* attributes. */
 438         OVS_FLOW_ATTR_ACTIONS,   /* Nested OVS_ACTION_ATTR_* attributes. */
 439         OVS_FLOW_ATTR_STATS,     /* struct ovs_flow_stats. */
 440         OVS_FLOW_ATTR_TCP_FLAGS, /* 8-bit OR'd TCP flags. */
 441         OVS_FLOW_ATTR_USED,      /* u64 msecs last used in monotonic time. */
 442         OVS_FLOW_ATTR_CLEAR,     /* Flag to clear stats, tcp_flags, used. */
 443         OVS_FLOW_ATTR_MASK,      /* Sequence of OVS_KEY_ATTR_* attributes. */
 444         __OVS_FLOW_ATTR_MAX
 445 };
 446
 447 #define OVS_FLOW_ATTR_MAX (__OVS_FLOW_ATTR_MAX - 1)
 448
 449 /**
 450  * enum ovs_sample_attr - Attributes for %OVS_ACTION_ATTR_SAMPLE action.
 451  * @OVS_SAMPLE_ATTR_PROBABILITY: 32-bit fraction of packets to sample with
 452  * @OVS_ACTION_ATTR_SAMPLE.  A value of 0 samples no packets, a value of
 453  * %UINT32_MAX samples all packets and intermediate values sample intermediate
 454  * fractions of packets.
 455  * @OVS_SAMPLE_ATTR_ACTIONS: Set of actions to execute in sampling event.
 456  * Actions are passed as nested attributes.
 457  *
 458  * Executes the specified actions with the given probability on a per-packet
 459  * basis.
 460  */
 461 enum ovs_sample_attr {
 462         OVS_SAMPLE_ATTR_UNSPEC,
 463         OVS_SAMPLE_ATTR_PROBABILITY, /* u32 number */
 464         OVS_SAMPLE_ATTR_ACTIONS,     /* Nested OVS_ACTION_ATTR_* attributes. */
 465         __OVS_SAMPLE_ATTR_MAX,
 466 };
 467
 468 #define OVS_SAMPLE_ATTR_MAX (__OVS_SAMPLE_ATTR_MAX - 1)
 469
 470 /**
 471  * enum ovs_userspace_attr - Attributes for %OVS_ACTION_ATTR_USERSPACE action.
 472  * @OVS_USERSPACE_ATTR_PID: u32 Netlink PID to which the %OVS_PACKET_CMD_ACTION
 473  * message should be sent.  Required.
 474  * @OVS_USERSPACE_ATTR_USERDATA: If present, its variable-length argument is
 475  * copied to the %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA.
 476  */
 477 enum ovs_userspace_attr {
 478         OVS_USERSPACE_ATTR_UNSPEC,
 479         OVS_USERSPACE_ATTR_PID,       /* u32 Netlink PID to receive upcalls. */
 480         OVS_USERSPACE_ATTR_USERDATA,  /* Optional user-specified cookie. */
 481         __OVS_USERSPACE_ATTR_MAX
 482 };
 483
 484 #define OVS_USERSPACE_ATTR_MAX (__OVS_USERSPACE_ATTR_MAX - 1)
 485
 486 /**
 487  * struct ovs_action_push_vlan - %OVS_ACTION_ATTR_PUSH_VLAN action argument.
 488  * @vlan_tpid: Tag protocol identifier (TPID) to push.
 489  * @vlan_tci: Tag control identifier (TCI) to push.  The CFI bit must be set
 490  * (but it will not be set in the 802.1Q header that is pushed).
 491  *
 492  * The @vlan_tpid value is typically %ETH_P_8021Q.  The only acceptable TPID
 493  * values are those that the kernel module also parses as 802.1Q headers, to
 494  * prevent %OVS_ACTION_ATTR_PUSH_VLAN followed by %OVS_ACTION_ATTR_POP_VLAN
 495  * from having surprising results.
 496  */
 497 struct ovs_action_push_vlan {
 498         __be16 vlan_tpid;       /* 802.1Q TPID. */
 499         __be16 vlan_tci;        /* 802.1Q TCI (VLAN ID and priority). */
 500 };
 501
 502 /* Data path hash algorithm for computing Datapath hash.
 503  *
 504  * The algorithm type only specifies the fields in a flow
 505  * will be used as part of the hash. Each datapath is free
 506  * to use its own hash algorithm. The hash value will be
 507  * opaque to the user space daemon.
 508  */
 509 enum ovs_hash_alg {
 510         OVS_HASH_ALG_L4,
 511 };
 512
 513 /*
 514  * struct ovs_action_hash - %OVS_ACTION_ATTR_HASH action argument.
 515  * @hash_alg: Algorithm used to compute hash prior to recirculation.
 516  * @hash_basis: basis used for computing hash.
 517  */
 518 struct ovs_action_hash {
 519         uint32_t  hash_alg;     /* One of ovs_hash_alg. */
 520         uint32_t  hash_basis;
 521 };
 522
 523 /**
 524  * enum ovs_action_attr - Action types.
 525  *
 526  * @OVS_ACTION_ATTR_OUTPUT: Output packet to port.
 527  * @OVS_ACTION_ATTR_USERSPACE: Send packet to userspace according to nested
 528  * %OVS_USERSPACE_ATTR_* attributes.
 529  * @OVS_ACTION_ATTR_SET: Replaces the contents of an existing header.  The
 530  * single nested %OVS_KEY_ATTR_* attribute specifies a header to modify and its
 531  * value.
 532  * @OVS_ACTION_ATTR_PUSH_VLAN: Push a new outermost 802.1Q header onto the
 533  * packet.
 534  * @OVS_ACTION_ATTR_POP_VLAN: Pop the outermost 802.1Q header off the packet.
 535  * @OVS_ACTION_ATTR_SAMPLE: Probabilitically executes actions, as specified in
 536  * the nested %OVS_SAMPLE_ATTR_* attributes.
 537  *
 538  * Only a single header can be set with a single %OVS_ACTION_ATTR_SET.  Not all
 539  * fields within a header are modifiable, e.g. the IPv4 protocol and fragment
 540  * type may not be changed.
 541  */
 542
 543 enum ovs_action_attr {
 544         OVS_ACTION_ATTR_UNSPEC,
 545         OVS_ACTION_ATTR_OUTPUT,       /* u32 port number. */
 546         OVS_ACTION_ATTR_USERSPACE,    /* Nested OVS_USERSPACE_ATTR_*. */
 547         OVS_ACTION_ATTR_SET,          /* One nested OVS_KEY_ATTR_*. */
 548         OVS_ACTION_ATTR_PUSH_VLAN,    /* struct ovs_action_push_vlan. */
 549         OVS_ACTION_ATTR_POP_VLAN,     /* No argument. */
 550         OVS_ACTION_ATTR_SAMPLE,       /* Nested OVS_SAMPLE_ATTR_*. */
 551         OVS_ACTION_ATTR_RECIRC,       /* u32 recirc_id. */
 552         OVS_ACTION_ATTR_HASH,         /* struct ovs_action_hash. */
 553         __OVS_ACTION_ATTR_MAX
 554 };
 555
 556 #define OVS_ACTION_ATTR_MAX (__OVS_ACTION_ATTR_MAX - 1)
 557
 558 #endif /* _LINUX_OPENVSWITCH_H */