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40 /* Protocol between userspace and kernel datapath.
42 * Be sure to update datapath/odp-compat.h if you change any of the structures
45 #ifndef OPENVSWITCH_DATAPATH_PROTOCOL_H
46 #define OPENVSWITCH_DATAPATH_PROTOCOL_H 1
48 /* The ovs_be<N> types indicate that an object is in big-endian, not
49 * native-endian, byte order. They are otherwise equivalent to uint<N>_t.
50 * The Linux kernel already has __be<N> types for this, which take on
51 * additional semantics when the "sparse" static checker is used, so we use
52 * those types when compiling the kernel. */
54 #include <linux/types.h>
55 #include <linux/socket.h>
56 #define ovs_be16 __be16
57 #define ovs_be32 __be32
58 #define ovs_be64 __be64
60 #include "openvswitch/types.h"
61 #include <sys/socket.h>
65 #define __aligned_u64 __u64 __attribute__((aligned(8)))
68 #include <linux/if_link.h>
70 #define ODP_MAX 256 /* Maximum number of datapaths. */
72 #define ODP_DP_CREATE _IO('O', 0)
73 #define ODP_DP_DESTROY _IO('O', 1)
74 #define ODP_DP_STATS _IOW('O', 2, struct odp_stats)
76 #define ODP_GET_DROP_FRAGS _IOW('O', 3, int)
77 #define ODP_SET_DROP_FRAGS _IOR('O', 4, int)
79 #define ODP_GET_LISTEN_MASK _IOW('O', 5, int)
80 #define ODP_SET_LISTEN_MASK _IOR('O', 6, int)
82 #define ODP_VPORT_ATTACH _IOR('O', 7, struct odp_port)
83 #define ODP_VPORT_DETACH _IOR('O', 8, int)
84 #define ODP_VPORT_QUERY _IOWR('O', 9, struct odp_port)
85 #define ODP_VPORT_LIST _IOWR('O', 10, struct odp_portvec)
87 #define ODP_FLOW_GET _IOWR('O', 13, struct odp_flow)
88 #define ODP_FLOW_PUT _IOWR('O', 14, struct odp_flow)
89 #define ODP_FLOW_LIST _IOWR('O', 15, struct odp_flowvec)
90 #define ODP_FLOW_FLUSH _IO('O', 16)
91 #define ODP_FLOW_DEL _IOWR('O', 17, struct odp_flow)
93 #define ODP_EXECUTE _IOR('O', 18, struct odp_execute)
95 #define ODP_SET_SFLOW_PROBABILITY _IOR('O', 19, int)
96 #define ODP_GET_SFLOW_PROBABILITY _IOW('O', 20, int)
98 #define ODP_VPORT_MOD _IOR('O', 22, struct odp_port)
99 #define ODP_VPORT_STATS_GET _IOWR('O', 24, struct odp_vport_stats_req)
100 #define ODP_VPORT_ETHER_GET _IOWR('O', 25, struct odp_vport_ether)
101 #define ODP_VPORT_ETHER_SET _IOW('O', 26, struct odp_vport_ether)
102 #define ODP_VPORT_MTU_GET _IOWR('O', 27, struct odp_vport_mtu)
103 #define ODP_VPORT_MTU_SET _IOW('O', 28, struct odp_vport_mtu)
104 #define ODP_VPORT_STATS_SET _IOWR('O', 29, struct odp_vport_stats_req)
108 uint32_t n_flows; /* Number of flows in flow table. */
109 uint32_t cur_capacity; /* Current flow table capacity. */
110 uint32_t max_capacity; /* Maximum expansion of flow table capacity. */
113 uint32_t n_ports; /* Current number of ports. */
114 uint32_t max_ports; /* Maximum supported number of ports. */
117 uint64_t n_frags; /* Number of dropped IP fragments. */
118 uint64_t n_hit; /* Number of flow table matches. */
119 uint64_t n_missed; /* Number of flow table misses. */
120 uint64_t n_lost; /* Number of misses not sent to userspace. */
123 uint16_t max_miss_queue; /* Max length of ODPL_MISS queue. */
124 uint16_t max_action_queue; /* Max length of ODPL_ACTION queue. */
125 uint16_t max_sflow_queue; /* Max length of ODPL_SFLOW queue. */
129 #define ODPP_LOCAL ((uint16_t)0)
130 #define ODPP_NONE ((uint16_t)-1)
131 #define ODPP_NORMAL ((uint16_t)-2)
133 /* Listening channels. */
134 #define _ODPL_MISS_NR 0 /* Packet missed in flow table. */
135 #define ODPL_MISS (1 << _ODPL_MISS_NR)
136 #define _ODPL_ACTION_NR 1 /* Packet output to ODPP_CONTROLLER. */
137 #define ODPL_ACTION (1 << _ODPL_ACTION_NR)
138 #define _ODPL_SFLOW_NR 2 /* sFlow samples. */
139 #define ODPL_SFLOW (1 << _ODPL_SFLOW_NR)
140 #define ODPL_ALL (ODPL_MISS | ODPL_ACTION | ODPL_SFLOW)
143 * struct odp_msg - format of messages read from datapath fd.
144 * @type: One of the %_ODPL_* constants.
145 * @length: Total length of message, including this header.
146 * @port: Port that received the packet embedded in this message.
147 * @reserved: Not currently used. Should be set to 0.
148 * @arg: Argument value whose meaning depends on @type.
150 * For @type == %_ODPL_MISS_NR, the header is followed by packet data. The
151 * @arg member is the ID (in network byte order) of the tunnel that
152 * encapsulated this packet. It is 0 if the packet was not received on a tunnel.
154 * For @type == %_ODPL_ACTION_NR, the header is followed by packet data. The
155 * @arg member is copied from the &struct odp_action_controller that caused
156 * the &struct odp_msg to be composed.
158 * For @type == %_ODPL_SFLOW_NR, the header is followed by &struct
159 * odp_sflow_sample_header, then by an array of &union odp_action (the number
160 * of which is specified in &struct odp_sflow_sample_header), then by packet
172 * struct odp_sflow_sample_header - header added to sFlow sampled packet.
173 * @sample_pool: Number of packets that were candidates for sFlow sampling,
174 * regardless of whether they were actually chosen and sent down to userspace.
175 * @n_actions: Number of "union odp_action"s immediately following this header.
177 * This header follows &struct odp_msg when that structure's @type is
178 * %_ODPL_SFLOW_NR, and it is itself followed by an array of &union odp_action
179 * (the number of which is specified in @n_actions) and then by packet data.
181 struct odp_sflow_sample_header {
182 uint32_t sample_pool;
186 #define VPORT_TYPE_SIZE 16
187 #define VPORT_CONFIG_SIZE 32
189 char devname[16]; /* IFNAMSIZ */
190 char type[VPORT_TYPE_SIZE];
194 __aligned_u64 config[VPORT_CONFIG_SIZE / 8]; /* type-specific */
198 struct odp_port *ports;
202 struct odp_flow_stats {
203 uint64_t n_packets; /* Number of matched packets. */
204 uint64_t n_bytes; /* Number of matched bytes. */
205 uint64_t used_sec; /* Time last used, in system monotonic time. */
209 uint16_t error; /* Used by ODP_FLOW_GET. */
213 * The datapath protocol adopts the Linux convention for TCI fields: if an
214 * 802.1Q header is present then its TCI value is used verbatim except that the
215 * CFI bit (0x1000) is always set to 1, and all-bits-zero indicates no 802.1Q
218 #define ODP_TCI_PRESENT 0x1000 /* CFI bit */
220 struct odp_flow_key {
221 ovs_be32 tun_id; /* Encapsulating tunnel ID. */
222 ovs_be32 nw_src; /* IP source address. */
223 ovs_be32 nw_dst; /* IP destination address. */
224 uint16_t in_port; /* Input switch port. */
225 ovs_be16 dl_tci; /* All zeros if 802.1Q header absent,
226 * ODP_TCI_PRESENT set if present. */
227 ovs_be16 dl_type; /* Ethernet frame type. */
228 ovs_be16 tp_src; /* TCP/UDP source port. */
229 ovs_be16 tp_dst; /* TCP/UDP destination port. */
230 uint8_t dl_src[6]; /* Ethernet source address. */
231 uint8_t dl_dst[6]; /* Ethernet destination address. */
232 uint8_t nw_proto; /* IP protocol or lower 8 bits of
234 uint8_t nw_tos; /* IP ToS (DSCP field, 6 bits). */
237 /* Flags for ODP_FLOW. */
238 #define ODPFF_ZERO_TCP_FLAGS (1 << 0) /* Zero the TCP flags. */
241 struct odp_flow_stats stats;
242 struct odp_flow_key key;
243 union odp_action *actions;
248 /* Flags for ODP_FLOW_PUT. */
249 #define ODPPF_CREATE (1 << 0) /* Allow creating a new flow. */
250 #define ODPPF_MODIFY (1 << 1) /* Allow modifying an existing flow. */
251 #define ODPPF_ZERO_STATS (1 << 2) /* Zero the stats of an existing flow. */
253 /* ODP_FLOW_PUT argument. */
254 struct odp_flow_put {
255 struct odp_flow flow;
260 struct odp_flow *flows;
265 #define ODPAT_OUTPUT 0 /* Output to switch port. */
266 #define ODPAT_CONTROLLER 2 /* Send copy to controller. */
267 #define ODPAT_SET_DL_TCI 3 /* Set the 802.1q TCI value. */
268 #define ODPAT_STRIP_VLAN 5 /* Strip the 802.1q header. */
269 #define ODPAT_SET_DL_SRC 6 /* Ethernet source address. */
270 #define ODPAT_SET_DL_DST 7 /* Ethernet destination address. */
271 #define ODPAT_SET_NW_SRC 8 /* IP source address. */
272 #define ODPAT_SET_NW_DST 9 /* IP destination address. */
273 #define ODPAT_SET_NW_TOS 10 /* IP ToS/DSCP field (6 bits). */
274 #define ODPAT_SET_TP_SRC 11 /* TCP/UDP source port. */
275 #define ODPAT_SET_TP_DST 12 /* TCP/UDP destination port. */
276 #define ODPAT_SET_TUNNEL 13 /* Set the encapsulating tunnel ID. */
277 #define ODPAT_SET_PRIORITY 14 /* Set skb->priority. */
278 #define ODPAT_POP_PRIORITY 15 /* Restore original skb->priority. */
279 #define ODPAT_DROP_SPOOFED_ARP 16 /* Drop ARPs with spoofed source MAC. */
280 #define ODPAT_N_ACTIONS 17
282 struct odp_action_output {
283 uint16_t type; /* ODPAT_OUTPUT. */
284 uint16_t port; /* Output port. */
289 struct odp_action_controller {
290 uint16_t type; /* ODPAT_OUTPUT_CONTROLLER. */
292 uint32_t arg; /* Copied to struct odp_msg 'arg' member. */
295 struct odp_action_tunnel {
296 uint16_t type; /* ODPAT_SET_TUNNEL. */
298 ovs_be32 tun_id; /* Tunnel ID. */
301 /* Action structure for ODPAT_SET_DL_TCI. */
302 struct odp_action_dl_tci {
303 uint16_t type; /* ODPAT_SET_DL_TCI. */
304 ovs_be16 tci; /* New TCI. CFI bit must be zero. */
308 /* Action structure for ODPAT_SET_DL_SRC/DST. */
309 struct odp_action_dl_addr {
310 uint16_t type; /* ODPAT_SET_DL_SRC/DST. */
311 uint8_t dl_addr[6]; /* Ethernet address. */
314 /* Action structure for ODPAT_SET_NW_SRC/DST. */
315 struct odp_action_nw_addr {
316 uint16_t type; /* ODPAT_SET_TW_SRC/DST. */
318 ovs_be32 nw_addr; /* IP address. */
321 struct odp_action_nw_tos {
322 uint16_t type; /* ODPAT_SET_NW_TOS. */
323 uint8_t nw_tos; /* IP ToS/DSCP field (6 bits). */
329 /* Action structure for ODPAT_SET_TP_SRC/DST. */
330 struct odp_action_tp_port {
331 uint16_t type; /* ODPAT_SET_TP_SRC/DST. */
332 ovs_be16 tp_port; /* TCP/UDP port. */
337 /* Action structure for ODPAT_SET_PRIORITY. */
338 struct odp_action_priority {
339 uint16_t type; /* ODPAT_SET_PRIORITY. */
341 uint32_t priority; /* skb->priority value. */
346 struct odp_action_output output;
347 struct odp_action_controller controller;
348 struct odp_action_tunnel tunnel;
349 struct odp_action_dl_tci dl_tci;
350 struct odp_action_dl_addr dl_addr;
351 struct odp_action_nw_addr nw_addr;
352 struct odp_action_nw_tos nw_tos;
353 struct odp_action_tp_port tp_port;
354 struct odp_action_priority priority;
358 union odp_action *actions;
365 #define VPORT_TYPE_SIZE 16
366 struct odp_vport_add {
367 char port_type[VPORT_TYPE_SIZE];
368 char devname[16]; /* IFNAMSIZ */
372 struct odp_vport_mod {
373 char devname[16]; /* IFNAMSIZ */
377 struct odp_vport_stats_req {
378 char devname[16]; /* IFNAMSIZ */
379 struct rtnl_link_stats64 stats;
382 struct odp_vport_ether {
383 char devname[16]; /* IFNAMSIZ */
384 unsigned char ether_addr[6];
387 struct odp_vport_mtu {
388 char devname[16]; /* IFNAMSIZ */
392 /* Values below this cutoff are 802.3 packets and the two bytes
393 * following MAC addresses are used as a frame length. Otherwise, the
394 * two bytes are used as the Ethernet type.
396 #define ODP_DL_TYPE_ETH2_CUTOFF 0x0600
398 /* Value of dl_type to indicate that the frame does not include an
401 #define ODP_DL_TYPE_NOT_ETH_TYPE 0x05ff
403 #endif /* openvswitch/datapath-protocol.h */