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40 #ifndef _LINUX_OPENVSWITCH_H
41 #define _LINUX_OPENVSWITCH_H 1
43 #include <linux/types.h>
44 #include <linux/if_ether.h>
47 * struct ovs_header - header for OVS Generic Netlink messages.
48 * @dp_ifindex: ifindex of local port for datapath (0 to make a request not
49 * specific to a datapath).
51 * Attributes following the header are specific to a particular OVS Generic
52 * Netlink family, but all of the OVS families use this header.
61 #define OVS_DATAPATH_FAMILY "ovs_datapath"
62 #define OVS_DATAPATH_MCGROUP "ovs_datapath"
65 * - API users are expected to provide OVS_DP_ATTR_USER_FEATURES
66 * when creating the datapath.
68 #define OVS_DATAPATH_VERSION 2
70 /* First OVS datapath version to support features */
71 #define OVS_DP_VER_FEATURES 2
73 enum ovs_datapath_cmd {
82 * enum ovs_datapath_attr - attributes for %OVS_DP_* commands.
83 * @OVS_DP_ATTR_NAME: Name of the network device that serves as the "local
84 * port". This is the name of the network device whose dp_ifindex is given in
85 * the &struct ovs_header. Always present in notifications. Required in
86 * %OVS_DP_NEW requests. May be used as an alternative to specifying
87 * dp_ifindex in other requests (with a dp_ifindex of 0).
88 * @OVS_DP_ATTR_UPCALL_PID: The Netlink socket in userspace that is initially
89 * set on the datapath port (for OVS_ACTION_ATTR_MISS). Only valid on
90 * %OVS_DP_CMD_NEW requests. A value of zero indicates that upcalls should
92 * @OVS_DP_ATTR_STATS: Statistics about packets that have passed through the
93 * datapath. Always present in notifications.
94 * @OVS_DP_ATTR_MEGAFLOW_STATS: Statistics about mega flow masks usage for the
95 * datapath. Always present in notifications.
97 * These attributes follow the &struct ovs_header within the Generic Netlink
98 * payload for %OVS_DP_* commands.
100 enum ovs_datapath_attr {
102 OVS_DP_ATTR_NAME, /* name of dp_ifindex netdev */
103 OVS_DP_ATTR_UPCALL_PID, /* Netlink PID to receive upcalls */
104 OVS_DP_ATTR_STATS, /* struct ovs_dp_stats */
105 OVS_DP_ATTR_MEGAFLOW_STATS, /* struct ovs_dp_megaflow_stats */
106 OVS_DP_ATTR_USER_FEATURES, /* OVS_DP_F_* */
110 #define OVS_DP_ATTR_MAX (__OVS_DP_ATTR_MAX - 1)
112 struct ovs_dp_stats {
113 __u64 n_hit; /* Number of flow table matches. */
114 __u64 n_missed; /* Number of flow table misses. */
115 __u64 n_lost; /* Number of misses not sent to userspace. */
116 __u64 n_flows; /* Number of flows present */
119 struct ovs_dp_megaflow_stats {
120 __u64 n_mask_hit; /* Number of masks used for flow lookups. */
121 __u32 n_masks; /* Number of masks for the datapath. */
122 __u32 pad0; /* Pad for future expension. */
123 __u64 pad1; /* Pad for future expension. */
124 __u64 pad2; /* Pad for future expension. */
127 struct ovs_vport_stats {
128 __u64 rx_packets; /* total packets received */
129 __u64 tx_packets; /* total packets transmitted */
130 __u64 rx_bytes; /* total bytes received */
131 __u64 tx_bytes; /* total bytes transmitted */
132 __u64 rx_errors; /* bad packets received */
133 __u64 tx_errors; /* packet transmit problems */
134 __u64 rx_dropped; /* no space in linux buffers */
135 __u64 tx_dropped; /* no space available in linux */
138 /* Allow last Netlink attribute to be unaligned */
139 #define OVS_DP_F_UNALIGNED (1 << 0)
141 /* Fixed logical ports. */
142 #define OVSP_LOCAL ((__u32)0)
144 /* Packet transfer. */
146 #define OVS_PACKET_FAMILY "ovs_packet"
147 #define OVS_PACKET_VERSION 0x1
149 enum ovs_packet_cmd {
150 OVS_PACKET_CMD_UNSPEC,
152 /* Kernel-to-user notifications. */
153 OVS_PACKET_CMD_MISS, /* Flow table miss. */
154 OVS_PACKET_CMD_ACTION, /* OVS_ACTION_ATTR_USERSPACE action. */
156 /* Userspace commands. */
157 OVS_PACKET_CMD_EXECUTE /* Apply actions to a packet. */
161 * enum ovs_packet_attr - attributes for %OVS_PACKET_* commands.
162 * @OVS_PACKET_ATTR_PACKET: Present for all notifications. Contains the entire
163 * packet as received, from the start of the Ethernet header onward. For
164 * %OVS_PACKET_CMD_ACTION, %OVS_PACKET_ATTR_PACKET reflects changes made by
165 * actions preceding %OVS_ACTION_ATTR_USERSPACE, but %OVS_PACKET_ATTR_KEY is
166 * the flow key extracted from the packet as originally received.
167 * @OVS_PACKET_ATTR_KEY: Present for all notifications. Contains the flow key
168 * extracted from the packet as nested %OVS_KEY_ATTR_* attributes. This allows
169 * userspace to adapt its flow setup strategy by comparing its notion of the
170 * flow key against the kernel's.
171 * @OVS_PACKET_ATTR_ACTIONS: Contains actions for the packet. Used
172 * for %OVS_PACKET_CMD_EXECUTE. It has nested %OVS_ACTION_ATTR_* attributes.
173 * @OVS_PACKET_ATTR_USERDATA: Present for an %OVS_PACKET_CMD_ACTION
174 * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
175 * %OVS_USERSPACE_ATTR_USERDATA attribute, with the same length and content
178 * These attributes follow the &struct ovs_header within the Generic Netlink
179 * payload for %OVS_PACKET_* commands.
181 enum ovs_packet_attr {
182 OVS_PACKET_ATTR_UNSPEC,
183 OVS_PACKET_ATTR_PACKET, /* Packet data. */
184 OVS_PACKET_ATTR_KEY, /* Nested OVS_KEY_ATTR_* attributes. */
185 OVS_PACKET_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
186 OVS_PACKET_ATTR_USERDATA, /* OVS_ACTION_ATTR_USERSPACE arg. */
187 __OVS_PACKET_ATTR_MAX
190 #define OVS_PACKET_ATTR_MAX (__OVS_PACKET_ATTR_MAX - 1)
194 #define OVS_VPORT_FAMILY "ovs_vport"
195 #define OVS_VPORT_MCGROUP "ovs_vport"
196 #define OVS_VPORT_VERSION 0x1
199 OVS_VPORT_CMD_UNSPEC,
206 enum ovs_vport_type {
207 OVS_VPORT_TYPE_UNSPEC,
208 OVS_VPORT_TYPE_NETDEV, /* network device */
209 OVS_VPORT_TYPE_INTERNAL, /* network device implemented by datapath */
210 OVS_VPORT_TYPE_GRE, /* GRE tunnel. */
211 OVS_VPORT_TYPE_VXLAN, /* VXLAN tunnel */
212 OVS_VPORT_TYPE_GRE64 = 104, /* GRE tunnel with 64-bit keys */
213 OVS_VPORT_TYPE_LISP = 105, /* LISP tunnel */
217 #define OVS_VPORT_TYPE_MAX (__OVS_VPORT_TYPE_MAX - 1)
220 * enum ovs_vport_attr - attributes for %OVS_VPORT_* commands.
221 * @OVS_VPORT_ATTR_PORT_NO: 32-bit port number within datapath.
222 * @OVS_VPORT_ATTR_TYPE: 32-bit %OVS_VPORT_TYPE_* constant describing the type
224 * @OVS_VPORT_ATTR_NAME: Name of vport. For a vport based on a network device
225 * this is the name of the network device. Maximum length %IFNAMSIZ-1 bytes
226 * plus a null terminator.
227 * @OVS_VPORT_ATTR_OPTIONS: Vport-specific configuration information.
228 * @OVS_VPORT_ATTR_UPCALL_PID: The Netlink socket in userspace that
229 * OVS_PACKET_CMD_MISS upcalls will be directed to for packets received on
230 * this port. A value of zero indicates that upcalls should not be sent.
231 * @OVS_VPORT_ATTR_STATS: A &struct ovs_vport_stats giving statistics for
232 * packets sent or received through the vport.
234 * These attributes follow the &struct ovs_header within the Generic Netlink
235 * payload for %OVS_VPORT_* commands.
237 * For %OVS_VPORT_CMD_NEW requests, the %OVS_VPORT_ATTR_TYPE and
238 * %OVS_VPORT_ATTR_NAME attributes are required. %OVS_VPORT_ATTR_PORT_NO is
239 * optional; if not specified a free port number is automatically selected.
240 * Whether %OVS_VPORT_ATTR_OPTIONS is required or optional depends on the type
241 * of vport. %OVS_VPORT_ATTR_STATS is optional and other attributes are
244 * For other requests, if %OVS_VPORT_ATTR_NAME is specified then it is used to
245 * look up the vport to operate on; otherwise dp_idx from the &struct
246 * ovs_header plus %OVS_VPORT_ATTR_PORT_NO determine the vport.
248 enum ovs_vport_attr {
249 OVS_VPORT_ATTR_UNSPEC,
250 OVS_VPORT_ATTR_PORT_NO, /* u32 port number within datapath */
251 OVS_VPORT_ATTR_TYPE, /* u32 OVS_VPORT_TYPE_* constant. */
252 OVS_VPORT_ATTR_NAME, /* string name, up to IFNAMSIZ bytes long */
253 OVS_VPORT_ATTR_OPTIONS, /* nested attributes, varies by vport type */
254 OVS_VPORT_ATTR_UPCALL_PID, /* u32 Netlink PID to receive upcalls */
255 OVS_VPORT_ATTR_STATS, /* struct ovs_vport_stats */
259 #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
261 /* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
264 OVS_TUNNEL_ATTR_UNSPEC,
265 OVS_TUNNEL_ATTR_DST_PORT, /* 16-bit UDP port, used by L4 tunnels. */
266 __OVS_TUNNEL_ATTR_MAX
269 #define OVS_TUNNEL_ATTR_MAX (__OVS_TUNNEL_ATTR_MAX - 1)
273 #define OVS_FLOW_FAMILY "ovs_flow"
274 #define OVS_FLOW_MCGROUP "ovs_flow"
275 #define OVS_FLOW_VERSION 0x1
285 struct ovs_flow_stats {
286 __u64 n_packets; /* Number of matched packets. */
287 __u64 n_bytes; /* Number of matched bytes. */
292 OVS_KEY_ATTR_ENCAP, /* Nested set of encapsulated attributes. */
293 OVS_KEY_ATTR_PRIORITY, /* u32 skb->priority */
294 OVS_KEY_ATTR_IN_PORT, /* u32 OVS dp port number */
295 OVS_KEY_ATTR_ETHERNET, /* struct ovs_key_ethernet */
296 OVS_KEY_ATTR_VLAN, /* be16 VLAN TCI */
297 OVS_KEY_ATTR_ETHERTYPE, /* be16 Ethernet type */
298 OVS_KEY_ATTR_IPV4, /* struct ovs_key_ipv4 */
299 OVS_KEY_ATTR_IPV6, /* struct ovs_key_ipv6 */
300 OVS_KEY_ATTR_TCP, /* struct ovs_key_tcp */
301 OVS_KEY_ATTR_UDP, /* struct ovs_key_udp */
302 OVS_KEY_ATTR_ICMP, /* struct ovs_key_icmp */
303 OVS_KEY_ATTR_ICMPV6, /* struct ovs_key_icmpv6 */
304 OVS_KEY_ATTR_ARP, /* struct ovs_key_arp */
305 OVS_KEY_ATTR_ND, /* struct ovs_key_nd */
306 OVS_KEY_ATTR_SKB_MARK, /* u32 skb mark */
307 OVS_KEY_ATTR_TUNNEL, /* Nested set of ovs_tunnel attributes */
308 OVS_KEY_ATTR_SCTP, /* struct ovs_key_sctp */
309 OVS_KEY_ATTR_TCP_FLAGS, /* be16 TCP flags. */
312 OVS_KEY_ATTR_IPV4_TUNNEL, /* struct ovs_key_ipv4_tunnel */
315 OVS_KEY_ATTR_MPLS = 62, /* array of struct ovs_key_mpls.
316 * The implementation may restrict
317 * the accepted length of the array. */
321 #define OVS_KEY_ATTR_MAX (__OVS_KEY_ATTR_MAX - 1)
323 enum ovs_tunnel_key_attr {
324 OVS_TUNNEL_KEY_ATTR_ID, /* be64 Tunnel ID */
325 OVS_TUNNEL_KEY_ATTR_IPV4_SRC, /* be32 src IP address. */
326 OVS_TUNNEL_KEY_ATTR_IPV4_DST, /* be32 dst IP address. */
327 OVS_TUNNEL_KEY_ATTR_TOS, /* u8 Tunnel IP ToS. */
328 OVS_TUNNEL_KEY_ATTR_TTL, /* u8 Tunnel IP TTL. */
329 OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT, /* No argument, set DF. */
330 OVS_TUNNEL_KEY_ATTR_CSUM, /* No argument. CSUM packet. */
331 __OVS_TUNNEL_KEY_ATTR_MAX
334 #define OVS_TUNNEL_KEY_ATTR_MAX (__OVS_TUNNEL_KEY_ATTR_MAX - 1)
337 * enum ovs_frag_type - IPv4 and IPv6 fragment type
338 * @OVS_FRAG_TYPE_NONE: Packet is not a fragment.
339 * @OVS_FRAG_TYPE_FIRST: Packet is a fragment with offset 0.
340 * @OVS_FRAG_TYPE_LATER: Packet is a fragment with nonzero offset.
342 * Used as the @ipv4_frag in &struct ovs_key_ipv4 and as @ipv6_frag &struct
352 #define OVS_FRAG_TYPE_MAX (__OVS_FRAG_TYPE_MAX - 1)
354 struct ovs_key_ethernet {
355 __u8 eth_src[ETH_ALEN];
356 __u8 eth_dst[ETH_ALEN];
359 struct ovs_key_mpls {
363 struct ovs_key_ipv4 {
369 __u8 ipv4_frag; /* One of OVS_FRAG_TYPE_*. */
372 struct ovs_key_ipv6 {
375 __be32 ipv6_label; /* 20-bits in least-significant bits. */
379 __u8 ipv6_frag; /* One of OVS_FRAG_TYPE_*. */
392 struct ovs_key_sctp {
397 struct ovs_key_icmp {
402 struct ovs_key_icmpv6 {
411 __u8 arp_sha[ETH_ALEN];
412 __u8 arp_tha[ETH_ALEN];
417 __u8 nd_sll[ETH_ALEN];
418 __u8 nd_tll[ETH_ALEN];
422 * enum ovs_flow_attr - attributes for %OVS_FLOW_* commands.
423 * @OVS_FLOW_ATTR_KEY: Nested %OVS_KEY_ATTR_* attributes specifying the flow
424 * key. Always present in notifications. Required for all requests (except
426 * @OVS_FLOW_ATTR_ACTIONS: Nested %OVS_ACTION_ATTR_* attributes specifying
427 * the actions to take for packets that match the key. Always present in
428 * notifications. Required for %OVS_FLOW_CMD_NEW requests, optional for
429 * %OVS_FLOW_CMD_SET requests.
430 * @OVS_FLOW_ATTR_STATS: &struct ovs_flow_stats giving statistics for this
431 * flow. Present in notifications if the stats would be nonzero. Ignored in
433 * @OVS_FLOW_ATTR_TCP_FLAGS: An 8-bit value giving the OR'd value of all of the
434 * TCP flags seen on packets in this flow. Only present in notifications for
435 * TCP flows, and only if it would be nonzero. Ignored in requests.
436 * @OVS_FLOW_ATTR_USED: A 64-bit integer giving the time, in milliseconds on
437 * the system monotonic clock, at which a packet was last processed for this
438 * flow. Only present in notifications if a packet has been processed for this
439 * flow. Ignored in requests.
440 * @OVS_FLOW_ATTR_CLEAR: If present in a %OVS_FLOW_CMD_SET request, clears the
441 * last-used time, accumulated TCP flags, and statistics for this flow.
442 * Otherwise ignored in requests. Never present in notifications.
443 * @OVS_FLOW_ATTR_MASK: Nested %OVS_KEY_ATTR_* attributes specifying the
444 * mask bits for wildcarded flow match. Mask bit value '1' specifies exact
445 * match with corresponding flow key bit, while mask bit value '0' specifies
446 * a wildcarded match. Omitting attribute is treated as wildcarding all
447 * corresponding fields. Optional for all requests. If not present,
448 * all flow key bits are exact match bits.
450 * These attributes follow the &struct ovs_header within the Generic Netlink
451 * payload for %OVS_FLOW_* commands.
454 OVS_FLOW_ATTR_UNSPEC,
455 OVS_FLOW_ATTR_KEY, /* Sequence of OVS_KEY_ATTR_* attributes. */
456 OVS_FLOW_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
457 OVS_FLOW_ATTR_STATS, /* struct ovs_flow_stats. */
458 OVS_FLOW_ATTR_TCP_FLAGS, /* 8-bit OR'd TCP flags. */
459 OVS_FLOW_ATTR_USED, /* u64 msecs last used in monotonic time. */
460 OVS_FLOW_ATTR_CLEAR, /* Flag to clear stats, tcp_flags, used. */
461 OVS_FLOW_ATTR_MASK, /* Sequence of OVS_KEY_ATTR_* attributes. */
465 #define OVS_FLOW_ATTR_MAX (__OVS_FLOW_ATTR_MAX - 1)
468 * enum ovs_sample_attr - Attributes for %OVS_ACTION_ATTR_SAMPLE action.
469 * @OVS_SAMPLE_ATTR_PROBABILITY: 32-bit fraction of packets to sample with
470 * @OVS_ACTION_ATTR_SAMPLE. A value of 0 samples no packets, a value of
471 * %UINT32_MAX samples all packets and intermediate values sample intermediate
472 * fractions of packets.
473 * @OVS_SAMPLE_ATTR_ACTIONS: Set of actions to execute in sampling event.
474 * Actions are passed as nested attributes.
476 * Executes the specified actions with the given probability on a per-packet
479 enum ovs_sample_attr {
480 OVS_SAMPLE_ATTR_UNSPEC,
481 OVS_SAMPLE_ATTR_PROBABILITY, /* u32 number */
482 OVS_SAMPLE_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
483 __OVS_SAMPLE_ATTR_MAX,
486 #define OVS_SAMPLE_ATTR_MAX (__OVS_SAMPLE_ATTR_MAX - 1)
489 * enum ovs_userspace_attr - Attributes for %OVS_ACTION_ATTR_USERSPACE action.
490 * @OVS_USERSPACE_ATTR_PID: u32 Netlink PID to which the %OVS_PACKET_CMD_ACTION
491 * message should be sent. Required.
492 * @OVS_USERSPACE_ATTR_USERDATA: If present, its variable-length argument is
493 * copied to the %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA.
495 enum ovs_userspace_attr {
496 OVS_USERSPACE_ATTR_UNSPEC,
497 OVS_USERSPACE_ATTR_PID, /* u32 Netlink PID to receive upcalls. */
498 OVS_USERSPACE_ATTR_USERDATA, /* Optional user-specified cookie. */
499 __OVS_USERSPACE_ATTR_MAX
502 #define OVS_USERSPACE_ATTR_MAX (__OVS_USERSPACE_ATTR_MAX - 1)
505 * struct ovs_action_push_mpls - %OVS_ACTION_ATTR_PUSH_MPLS action argument.
506 * @mpls_lse: MPLS label stack entry to push.
507 * @mpls_ethertype: Ethertype to set in the encapsulating ethernet frame.
509 * The only values @mpls_ethertype should ever be given are %ETH_P_MPLS_UC and
510 * %ETH_P_MPLS_MC, indicating MPLS unicast or multicast. Other are rejected.
512 struct ovs_action_push_mpls {
514 __be16 mpls_ethertype; /* Either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC */
518 * struct ovs_action_push_vlan - %OVS_ACTION_ATTR_PUSH_VLAN action argument.
519 * @vlan_tpid: Tag protocol identifier (TPID) to push.
520 * @vlan_tci: Tag control identifier (TCI) to push. The CFI bit must be set
521 * (but it will not be set in the 802.1Q header that is pushed).
523 * The @vlan_tpid value is typically %ETH_P_8021Q. The only acceptable TPID
524 * values are those that the kernel module also parses as 802.1Q headers, to
525 * prevent %OVS_ACTION_ATTR_PUSH_VLAN followed by %OVS_ACTION_ATTR_POP_VLAN
526 * from having surprising results.
528 struct ovs_action_push_vlan {
529 __be16 vlan_tpid; /* 802.1Q TPID. */
530 __be16 vlan_tci; /* 802.1Q TCI (VLAN ID and priority). */
534 * enum ovs_action_attr - Action types.
536 * @OVS_ACTION_ATTR_OUTPUT: Output packet to port.
537 * @OVS_ACTION_ATTR_USERSPACE: Send packet to userspace according to nested
538 * %OVS_USERSPACE_ATTR_* attributes.
539 * @OVS_ACTION_ATTR_PUSH_VLAN: Push a new outermost 802.1Q header onto the
541 * @OVS_ACTION_ATTR_POP_VLAN: Pop the outermost 802.1Q header off the packet.
542 * @OVS_ACTION_ATTR_SAMPLE: Probabilitically executes actions, as specified in
543 * the nested %OVS_SAMPLE_ATTR_* attributes.
544 * @OVS_ACTION_ATTR_SET: Replaces the contents of an existing header. The
545 * single nested %OVS_KEY_ATTR_* attribute specifies a header to modify and its
547 * @OVS_ACTION_ATTR_PUSH_MPLS: Push a new MPLS label stack entry onto the
548 * top of the packets MPLS label stack. Set the ethertype of the
549 * encapsulating frame to either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC to
550 * indicate the new packet contents.
551 * @OVS_ACTION_ATTR_POP_MPLS: Pop an MPLS label stack entry off of the
552 * packet's MPLS label stack. Set the encapsulating frame's ethertype to
553 * indicate the new packet contents. This could potentially still be
554 * %ETH_P_MPLS if the resulting MPLS label stack is not empty. If there
555 * is no MPLS label stack, as determined by ethertype, no action is taken.
557 * Only a single header can be set with a single %OVS_ACTION_ATTR_SET. Not all
558 * fields within a header are modifiable, e.g. the IPv4 protocol and fragment
559 * type may not be changed.
562 enum ovs_action_attr {
563 OVS_ACTION_ATTR_UNSPEC,
564 OVS_ACTION_ATTR_OUTPUT, /* u32 port number. */
565 OVS_ACTION_ATTR_USERSPACE, /* Nested OVS_USERSPACE_ATTR_*. */
566 OVS_ACTION_ATTR_SET, /* One nested OVS_KEY_ATTR_*. */
567 OVS_ACTION_ATTR_PUSH_VLAN, /* struct ovs_action_push_vlan. */
568 OVS_ACTION_ATTR_POP_VLAN, /* No argument. */
569 OVS_ACTION_ATTR_SAMPLE, /* Nested OVS_SAMPLE_ATTR_*. */
570 OVS_ACTION_ATTR_PUSH_MPLS, /* struct ovs_action_push_mpls. */
571 OVS_ACTION_ATTR_POP_MPLS, /* __be16 ethertype. */
572 __OVS_ACTION_ATTR_MAX
575 #define OVS_ACTION_ATTR_MAX (__OVS_ACTION_ATTR_MAX - 1)
577 #endif /* _LINUX_OPENVSWITCH_H */