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40 #ifndef OPENVSWITCH_DATAPATH_PROTOCOL_H
41 #define OPENVSWITCH_DATAPATH_PROTOCOL_H 1
44 #include <linux/types.h>
45 #define ovs_be16 __be16
46 #define ovs_be32 __be32
47 #define ovs_be64 __be64
49 #include "openvswitch/types.h"
54 #define OVS_DATAPATH_FAMILY "ovs_datapath"
55 #define OVS_DATAPATH_MCGROUP "ovs_datapath"
57 enum ovs_datapath_cmd {
66 * struct ovs_header - header for OVS Generic Netlink messages.
67 * @dp_ifindex: ifindex of local port for datapath (0 to make a request not
68 * specific to a datapath).
70 * Attributes following the header are specific to a particular OVS Generic
71 * Netlink family, but all of the OVS families use this header.
78 * enum ovs_datapath_attr - attributes for %OVS_DP_* commands.
79 * @OVS_DP_ATTR_NAME: Name of the network device that serves as the "local
80 * port". This is the name of the network device whose dp_ifindex is given in
81 * the &struct ovs_header. Always present in notifications. Required in
82 * %OVS_DP_NEW requests. May be used as an alternative to specifying
83 * dp_ifindex in other requests (with a dp_ifindex of 0).
84 * @OVS_DP_ATTR_UPCALL_PID: The Netlink socket in userspace that is initially
85 * set on the datapath port (for OVS_ACTION_ATTR_MISS). Only valid on
86 * %OVS_DP_CMD_NEW requests. A value of zero indicates that upcalls should
88 * @OVS_DP_ATTR_STATS: Statistics about packets that have passed through the
89 * datapath. Always present in notifications.
90 * @OVS_DP_ATTR_IPV4_FRAGS: One of %OVS_DP_FRAG_*. Always present in
91 * notifications. May be included in %OVS_DP_NEW or %OVS_DP_SET requests to
92 * change the fragment handling policy.
94 * These attributes follow the &struct ovs_header within the Generic Netlink
95 * payload for %OVS_DP_* commands.
97 enum ovs_datapath_attr {
99 OVS_DP_ATTR_NAME, /* name of dp_ifindex netdev */
100 OVS_DP_ATTR_UPCALL_PID, /* Netlink PID to receive upcalls */
101 OVS_DP_ATTR_STATS, /* struct ovs_dp_stats */
102 OVS_DP_ATTR_IPV4_FRAGS, /* 32-bit enum ovs_frag_handling */
106 #define OVS_DP_ATTR_MAX (__OVS_DP_ATTR_MAX - 1)
109 * enum ovs_frag_handling - policy for handling received IPv4 fragments.
110 * @OVS_DP_FRAG_ZERO: Treat IP fragments as IP protocol 0 and transport ports
112 * @OVS_DP_FRAG_DROP: Drop IP fragments. Do not pass them through the flow
113 * table or up to userspace.
115 enum ovs_frag_handling {
117 OVS_DP_FRAG_ZERO, /* Treat IP fragments as transport port 0. */
118 OVS_DP_FRAG_DROP /* Drop IP fragments. */
121 struct ovs_dp_stats {
122 uint64_t n_frags; /* Number of dropped IP fragments. */
123 uint64_t n_hit; /* Number of flow table matches. */
124 uint64_t n_missed; /* Number of flow table misses. */
125 uint64_t n_lost; /* Number of misses not sent to userspace. */
126 uint64_t n_flows; /* Number of flows present */
129 struct ovs_vport_stats {
130 uint64_t rx_packets; /* total packets received */
131 uint64_t tx_packets; /* total packets transmitted */
132 uint64_t rx_bytes; /* total bytes received */
133 uint64_t tx_bytes; /* total bytes transmitted */
134 uint64_t rx_errors; /* bad packets received */
135 uint64_t tx_errors; /* packet transmit problems */
136 uint64_t rx_dropped; /* no space in linux buffers */
137 uint64_t tx_dropped; /* no space available in linux */
141 #define OVSP_LOCAL ((uint16_t)0)
143 #define OVS_PACKET_FAMILY "ovs_packet"
145 enum ovs_packet_cmd {
146 OVS_PACKET_CMD_UNSPEC,
148 /* Kernel-to-user notifications. */
149 OVS_PACKET_CMD_MISS, /* Flow table miss. */
150 OVS_PACKET_CMD_ACTION, /* OVS_ACTION_ATTR_USERSPACE action. */
153 OVS_PACKET_CMD_EXECUTE /* Apply actions to a packet. */
157 * enum ovs_packet_attr - attributes for %OVS_PACKET_* commands.
158 * @OVS_PACKET_ATTR_PACKET: Present for all notifications. Contains the entire
159 * packet as received, from the start of the Ethernet header onward. For
160 * %OVS_PACKET_CMD_ACTION, %OVS_PACKET_ATTR_PACKET reflects changes made by
161 * actions preceding %OVS_ACTION_ATTR_USERSPACE, but %OVS_PACKET_ATTR_KEY is
162 * the flow key extracted from the packet as originally received.
163 * @OVS_PACKET_ATTR_KEY: Present for all notifications. Contains the flow key
164 * extracted from the packet as nested %OVS_KEY_ATTR_* attributes. This allows
165 * userspace to adapt its flow setup strategy by comparing its notion of the
166 * flow key against the kernel's.
167 * @OVS_PACKET_ATTR_ACTIONS: Contains actions for the packet. Used
168 * for %OVS_PACKET_CMD_EXECUTE. It has nested %OVS_ACTION_ATTR_* attributes.
169 * @OVS_PACKET_ATTR_USERDATA: Present for an %OVS_PACKET_CMD_ACTION
170 * notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
171 * %OVS_USERSPACE_ATTR_USERDATA attribute.
173 * These attributes follow the &struct ovs_header within the Generic Netlink
174 * payload for %OVS_PACKET_* commands.
176 enum ovs_packet_attr {
177 OVS_PACKET_ATTR_UNSPEC,
178 OVS_PACKET_ATTR_PACKET, /* Packet data. */
179 OVS_PACKET_ATTR_KEY, /* Nested OVS_KEY_ATTR_* attributes. */
180 OVS_PACKET_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
181 OVS_PACKET_ATTR_USERDATA, /* u64 OVS_ACTION_ATTR_USERSPACE arg. */
182 __OVS_PACKET_ATTR_MAX
185 #define OVS_PACKET_ATTR_MAX (__OVS_PACKET_ATTR_MAX - 1)
187 enum ovs_vport_type {
188 OVS_VPORT_TYPE_UNSPEC,
189 OVS_VPORT_TYPE_NETDEV, /* network device */
190 OVS_VPORT_TYPE_INTERNAL, /* network device implemented by datapath */
191 OVS_VPORT_TYPE_PATCH, /* virtual tunnel connecting two vports */
192 OVS_VPORT_TYPE_GRE, /* GRE tunnel */
193 OVS_VPORT_TYPE_CAPWAP, /* CAPWAP tunnel */
197 #define OVS_VPORT_TYPE_MAX (__OVS_VPORT_TYPE_MAX - 1)
199 #define OVS_VPORT_FAMILY "ovs_vport"
200 #define OVS_VPORT_MCGROUP "ovs_vport"
203 OVS_VPORT_CMD_UNSPEC,
211 * enum ovs_vport_attr - attributes for %OVS_VPORT_* commands.
212 * @OVS_VPORT_ATTR_PORT_NO: 32-bit port number within datapath.
213 * @OVS_VPORT_ATTR_TYPE: 32-bit %OVS_VPORT_TYPE_* constant describing the type
215 * @OVS_VPORT_ATTR_NAME: Name of vport. For a vport based on a network device
216 * this is the name of the network device. Maximum length %IFNAMSIZ-1 bytes
217 * plus a null terminator.
218 * @OVS_VPORT_ATTR_UPCALL_PID: The Netlink socket in userspace that
219 * OVS_PACKET_CMD_MISS upcalls will be directed to for packets received on
220 * this port. A value of zero indicates that upcalls should not be sent.
221 * @OVS_VPORT_ATTR_STATS: A &struct ovs_vport_stats giving statistics for
222 * packets sent or received through the vport.
223 * @OVS_VPORT_ATTR_ADDRESS: A 6-byte Ethernet address for the vport.
225 * These attributes follow the &struct ovs_header within the Generic Netlink
226 * payload for %OVS_VPORT_* commands.
228 * For %OVS_VPORT_CMD_NEW requests, the %OVS_VPORT_ATTR_TYPE and
229 * %OVS_VPORT_ATTR_NAME attributes are required. %OVS_VPORT_ATTR_PORT_NO is
230 * optional; if not specified a free port number is automatically selected.
231 * Whether %OVS_VPORT_ATTR_OPTIONS is required or optional depends on the type
232 * of vport. %OVS_VPORT_ATTR_STATS and %OVS_VPORT_ATTR_ADDRESS are optional,
233 * and other attributes are ignored.
235 * For other requests, if %OVS_VPORT_ATTR_NAME is specified then it is used to
236 * look up the vport to operate on; otherwise dp_idx from the &struct
237 * ovs_header plus %OVS_VPORT_ATTR_PORT_NO determine the vport.
239 enum ovs_vport_attr {
240 OVS_VPORT_ATTR_UNSPEC,
241 OVS_VPORT_ATTR_PORT_NO, /* port number within datapath */
242 OVS_VPORT_ATTR_TYPE, /* 32-bit OVS_VPORT_TYPE_* constant. */
243 OVS_VPORT_ATTR_NAME, /* string name, up to IFNAMSIZ bytes long */
244 OVS_VPORT_ATTR_UPCALL_PID, /* Netlink PID to receive upcalls */
245 OVS_VPORT_ATTR_STATS, /* struct ovs_vport_stats */
246 OVS_VPORT_ATTR_ADDRESS, /* hardware address */
247 OVS_VPORT_ATTR_OPTIONS, /* nested attributes, varies by vport type */
251 #define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
253 /* OVS_VPORT_ATTR_OPTIONS attributes for patch vports. */
255 OVS_PATCH_ATTR_UNSPEC,
256 OVS_PATCH_ATTR_PEER, /* name of peer vport, as a string */
260 #define OVS_PATCH_ATTR_MAX (__OVS_PATCH_ATTR_MAX - 1)
264 #define OVS_FLOW_FAMILY "ovs_flow"
265 #define OVS_FLOW_MCGROUP "ovs_flow"
275 struct ovs_flow_stats {
276 uint64_t n_packets; /* Number of matched packets. */
277 uint64_t n_bytes; /* Number of matched bytes. */
282 OVS_KEY_ATTR_TUN_ID, /* 64-bit tunnel ID */
283 OVS_KEY_ATTR_IN_PORT, /* 32-bit OVS dp port number */
284 OVS_KEY_ATTR_ETHERNET, /* struct ovs_key_ethernet */
285 OVS_KEY_ATTR_8021Q, /* struct ovs_key_8021q */
286 OVS_KEY_ATTR_ETHERTYPE, /* 16-bit Ethernet type */
287 OVS_KEY_ATTR_IPV4, /* struct ovs_key_ipv4 */
288 OVS_KEY_ATTR_IPV6, /* struct ovs_key_ipv6 */
289 OVS_KEY_ATTR_TCP, /* struct ovs_key_tcp */
290 OVS_KEY_ATTR_UDP, /* struct ovs_key_udp */
291 OVS_KEY_ATTR_ICMP, /* struct ovs_key_icmp */
292 OVS_KEY_ATTR_ICMPV6, /* struct ovs_key_icmpv6 */
293 OVS_KEY_ATTR_ARP, /* struct ovs_key_arp */
294 OVS_KEY_ATTR_ND, /* struct ovs_key_nd */
298 #define OVS_KEY_ATTR_MAX (__OVS_KEY_ATTR_MAX - 1)
300 struct ovs_key_ethernet {
305 struct ovs_key_8021q {
310 struct ovs_key_ipv4 {
317 struct ovs_key_ipv6 {
318 ovs_be32 ipv6_src[4];
319 ovs_be32 ipv6_dst[4];
334 struct ovs_key_icmp {
339 struct ovs_key_icmpv6 {
353 uint32_t nd_target[4];
359 * enum ovs_flow_attr - attributes for %OVS_FLOW_* commands.
360 * @OVS_FLOW_ATTR_KEY: Nested %OVS_KEY_ATTR_* attributes specifying the flow
361 * key. Always present in notifications. Required for all requests (except
363 * @OVS_FLOW_ATTR_ACTIONS: Nested %OVS_ACTION_ATTR_* attributes specifying
364 * the actions to take for packets that match the key. Always present in
365 * notifications. Required for %OVS_FLOW_CMD_NEW requests, optional
366 * @OVS_FLOW_ATTR_STATS: &struct ovs_flow_stats giving statistics for this
367 * flow. Present in notifications if the stats would be nonzero. Ignored in
369 * @OVS_FLOW_ATTR_TCP_FLAGS: An 8-bit value giving the OR'd value of all of the
370 * TCP flags seen on packets in this flow. Only present in notifications for
371 * TCP flows, and only if it would be nonzero. Ignored in requests.
372 * @OVS_FLOW_ATTR_USED: A 64-bit integer giving the time, in milliseconds on
373 * the system monotonic clock, at which a packet was last processed for this
374 * flow. Only present in notifications if a packet has been processed for this
375 * flow. Ignored in requests.
376 * @OVS_FLOW_ATTR_CLEAR: If present in a %OVS_FLOW_CMD_SET request, clears the
377 * last-used time, accumulated TCP flags, and statistics for this flow.
378 * Otherwise ignored in requests. Never present in notifications.
380 * These attributes follow the &struct ovs_header within the Generic Netlink
381 * payload for %OVS_FLOW_* commands.
384 OVS_FLOW_ATTR_UNSPEC,
385 OVS_FLOW_ATTR_KEY, /* Sequence of OVS_KEY_ATTR_* attributes. */
386 OVS_FLOW_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
387 OVS_FLOW_ATTR_STATS, /* struct ovs_flow_stats. */
388 OVS_FLOW_ATTR_TCP_FLAGS, /* 8-bit OR'd TCP flags. */
389 OVS_FLOW_ATTR_USED, /* u64 msecs last used in monotonic time. */
390 OVS_FLOW_ATTR_CLEAR, /* Flag to clear stats, tcp_flags, used. */
394 #define OVS_FLOW_ATTR_MAX (__OVS_FLOW_ATTR_MAX - 1)
397 * enum ovs_sample_attr - Attributes for %OVS_ACTION_ATTR_SAMPLE action.
398 * @OVS_SAMPLE_ATTR_PROBABILITY: 32-bit fraction of packets to sample with
399 * @OVS_ACTION_ATTR_SAMPLE. A value of 0 samples no packets, a value of
400 * %UINT32_MAX samples all packets and intermediate values sample intermediate
401 * fractions of packets.
402 * @OVS_SAMPLE_ATTR_ACTIONS: Set of actions to execute in sampling event.
403 * Actions are passed as nested attributes.
405 * Executes the specified actions with the given probability on a per-packet
408 enum ovs_sample_attr {
409 OVS_SAMPLE_ATTR_UNSPEC,
410 OVS_SAMPLE_ATTR_PROBABILITY, /* u32 number */
411 OVS_SAMPLE_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
412 __OVS_SAMPLE_ATTR_MAX,
415 #define OVS_SAMPLE_ATTR_MAX (__OVS_SAMPLE_ATTR_MAX - 1)
418 * enum ovs_userspace_attr - Attributes for %OVS_ACTION_ATTR_USERSPACE action.
419 * @OVS_USERSPACE_ATTR_PID: u32 Netlink PID to which the %OVS_PACKET_CMD_ACTION
420 * message should be sent. Required.
421 * @OVS_USERSPACE_ATTR_USERDATA: If present, its u64 argument is copied to the
422 * %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA,
424 enum ovs_userspace_attr {
425 OVS_USERSPACE_ATTR_UNSPEC,
426 OVS_USERSPACE_ATTR_PID, /* u32 Netlink PID to receive upcalls. */
427 OVS_USERSPACE_ATTR_USERDATA, /* u64 optional user-specified cookie. */
428 __OVS_USERSPACE_ATTR_MAX
431 #define OVS_USERSPACE_ATTR_MAX (__OVS_USERSPACE_ATTR_MAX - 1)
434 enum ovs_action_type {
435 OVS_ACTION_ATTR_UNSPEC,
436 OVS_ACTION_ATTR_OUTPUT, /* Output to switch port. */
437 OVS_ACTION_ATTR_USERSPACE, /* Nested OVS_USERSPACE_ATTR_*. */
438 OVS_ACTION_ATTR_PUSH_VLAN, /* Set the 802.1q TCI value. */
439 OVS_ACTION_ATTR_POP_VLAN, /* Strip the 802.1q header. */
440 OVS_ACTION_ATTR_SET_DL_SRC, /* Ethernet source address. */
441 OVS_ACTION_ATTR_SET_DL_DST, /* Ethernet destination address. */
442 OVS_ACTION_ATTR_SET_NW_SRC, /* IPv4 source address. */
443 OVS_ACTION_ATTR_SET_NW_DST, /* IPv4 destination address. */
444 OVS_ACTION_ATTR_SET_NW_TOS, /* IP ToS/DSCP field (6 bits). */
445 OVS_ACTION_ATTR_SET_TP_SRC, /* TCP/UDP source port. */
446 OVS_ACTION_ATTR_SET_TP_DST, /* TCP/UDP destination port. */
447 OVS_ACTION_ATTR_SET_TUNNEL, /* Set the encapsulating tunnel ID. */
448 OVS_ACTION_ATTR_SET_PRIORITY, /* Set skb->priority. */
449 OVS_ACTION_ATTR_POP_PRIORITY, /* Restore original skb->priority. */
450 OVS_ACTION_ATTR_SAMPLE, /* Nested OVS_SAMPLE_ATTR_*. */
451 __OVS_ACTION_ATTR_MAX
454 #define OVS_ACTION_ATTR_MAX (__OVS_ACTION_ATTR_MAX - 1)
456 #endif /* openvswitch/datapath-protocol.h */