2 * Copyright (c) 2009, 2010 Nicira Networks.
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37 * ----------------------------------------------------------------------
40 /* Protocol between userspace and kernel datapath. */
42 #ifndef OPENVSWITCH_DATAPATH_PROTOCOL_H
43 #define OPENVSWITCH_DATAPATH_PROTOCOL_H 1
46 #include <linux/types.h>
48 #include <sys/types.h>
50 #include <linux/if_ether.h>
52 #define ODP_MAX 256 /* Maximum number of datapaths. */
54 #define ODP_DP_CREATE _IO('O', 0)
55 #define ODP_DP_DESTROY _IO('O', 1)
56 #define ODP_DP_STATS _IOW('O', 2, struct odp_stats)
58 #define ODP_GET_DROP_FRAGS _IOW('O', 3, int)
59 #define ODP_SET_DROP_FRAGS _IOR('O', 4, int)
61 #define ODP_GET_LISTEN_MASK _IOW('O', 5, int)
62 #define ODP_SET_LISTEN_MASK _IOR('O', 6, int)
64 #define ODP_PORT_ADD _IOR('O', 7, struct odp_port)
65 #define ODP_PORT_DEL _IOR('O', 8, int)
66 #define ODP_PORT_QUERY _IOWR('O', 9, struct odp_port)
67 #define ODP_PORT_LIST _IOWR('O', 10, struct odp_portvec)
69 #define ODP_PORT_GROUP_SET _IOR('O', 11, struct odp_port_group)
70 #define ODP_PORT_GROUP_GET _IOWR('O', 12, struct odp_port_group)
72 #define ODP_FLOW_GET _IOWR('O', 13, struct odp_flow)
73 #define ODP_FLOW_PUT _IOWR('O', 14, struct odp_flow)
74 #define ODP_FLOW_LIST _IOWR('O', 15, struct odp_flowvec)
75 #define ODP_FLOW_FLUSH _IO('O', 16)
76 #define ODP_FLOW_DEL _IOWR('O', 17, struct odp_flow)
78 #define ODP_EXECUTE _IOR('O', 18, struct odp_execute)
80 #define ODP_SET_SFLOW_PROBABILITY _IOR('O', 19, int)
81 #define ODP_GET_SFLOW_PROBABILITY _IOW('O', 20, int)
85 __u32 n_flows; /* Number of flows in flow table. */
86 __u32 cur_capacity; /* Current flow table capacity. */
87 __u32 max_capacity; /* Maximum expansion of flow table capacity. */
90 __u32 n_ports; /* Current number of ports. */
91 __u32 max_ports; /* Maximum supported number of ports. */
92 __u16 max_groups; /* Maximum number of port groups. */
96 __u64 n_frags; /* Number of dropped IP fragments. */
97 __u64 n_hit; /* Number of flow table matches. */
98 __u64 n_missed; /* Number of flow table misses. */
99 __u64 n_lost; /* Number of misses not sent to userspace. */
102 __u16 max_miss_queue; /* Max length of ODPL_MISS queue. */
103 __u16 max_action_queue; /* Max length of ODPL_ACTION queue. */
104 __u16 max_sflow_queue; /* Max length of ODPL_SFLOW queue. */
108 #define ODPP_LOCAL ((__u16)0)
109 #define ODPP_NONE ((__u16)-1)
111 /* Listening channels. */
112 #define _ODPL_MISS_NR 0 /* Packet missed in flow table. */
113 #define ODPL_MISS (1 << _ODPL_MISS_NR)
114 #define _ODPL_ACTION_NR 1 /* Packet output to ODPP_CONTROLLER. */
115 #define ODPL_ACTION (1 << _ODPL_ACTION_NR)
116 #define _ODPL_SFLOW_NR 2 /* sFlow samples. */
117 #define ODPL_SFLOW (1 << _ODPL_SFLOW_NR)
118 #define ODPL_ALL (ODPL_MISS | ODPL_ACTION | ODPL_SFLOW)
121 * struct odp_msg - format of messages read from datapath fd.
122 * @type: One of the %_ODPL_* constants.
123 * @length: Total length of message, including this header.
124 * @port: Port that received the packet embedded in this message.
125 * @reserved: Not currently used. Should be set to 0.
126 * @arg: Argument value whose meaning depends on @type.
128 * For @type == %_ODPL_MISS_NR, the header is followed by packet data. The
129 * @arg member is unused and set to 0.
131 * For @type == %_ODPL_ACTION_NR, the header is followed by packet data. The
132 * @arg member is copied from the &struct odp_action_controller that caused
133 * the &struct odp_msg to be composed.
135 * For @type == %_ODPL_SFLOW_NR, the header is followed by &struct
136 * odp_sflow_sample_header, then by an array of &union odp_action (the number
137 * of which is specified in &struct odp_sflow_sample_header), then by packet
149 * struct odp_sflow_sample_header - header added to sFlow sampled packet.
150 * @sample_pool: Number of packets that were candidates for sFlow sampling,
151 * regardless of whether they were actually chosen and sent down to userspace.
152 * @n_actions: Number of "union odp_action"s immediately following this header.
154 * This header follows &struct odp_msg when that structure's @type is
155 * %_ODPL_SFLOW_NR, and it is itself followed by an array of &union odp_action
156 * (the number of which is specified in @n_actions) and then by packet data.
158 struct odp_sflow_sample_header {
163 #define ODP_PORT_INTERNAL (1 << 0) /* This port is simulated. */
165 char devname[16]; /* IFNAMSIZ */
172 struct odp_port *ports;
176 struct odp_port_group {
178 __u16 n_ports; /* Number of ports. */
179 __u16 group; /* Group number. */
182 struct odp_flow_stats {
183 __u64 n_packets; /* Number of matched packets. */
184 __u64 n_bytes; /* Number of matched bytes. */
185 __u64 used_sec; /* Time last used. */
189 __u16 error; /* Used by ODP_FLOW_GET. */
192 struct odp_flow_key {
193 __be32 nw_src; /* IP source address. */
194 __be32 nw_dst; /* IP destination address. */
195 __u16 in_port; /* Input switch port. */
196 __be16 dl_vlan; /* Input VLAN. */
197 __be16 dl_type; /* Ethernet frame type. */
198 __be16 tp_src; /* TCP/UDP source port. */
199 __be16 tp_dst; /* TCP/UDP destination port. */
200 __u8 dl_src[ETH_ALEN]; /* Ethernet source address. */
201 __u8 dl_dst[ETH_ALEN]; /* Ethernet destination address. */
202 __u8 nw_proto; /* IP protocol or lower 8 bits of
204 __u8 reserved; /* Pad to 64 bits. */
207 /* Flags for ODP_FLOW. */
208 #define ODPFF_ZERO_TCP_FLAGS (1 << 0) /* Zero the TCP flags. */
211 struct odp_flow_stats stats;
212 struct odp_flow_key key;
213 union odp_action *actions;
218 /* Flags for ODP_FLOW_PUT. */
219 #define ODPPF_CREATE (1 << 0) /* Allow creating a new flow. */
220 #define ODPPF_MODIFY (1 << 1) /* Allow modifying an existing flow. */
221 #define ODPPF_ZERO_STATS (1 << 2) /* Zero the stats of an existing flow. */
223 /* ODP_FLOW_PUT argument. */
224 struct odp_flow_put {
225 struct odp_flow flow;
230 struct odp_flow *flows;
234 /* The VLAN id is 12 bits, so we can use the entire 16 bits to indicate
235 * special conditions. All ones is used to match that no VLAN id was
237 #define ODP_VLAN_NONE 0xffff
240 #define ODPAT_OUTPUT 0 /* Output to switch port. */
241 #define ODPAT_OUTPUT_GROUP 1 /* Output to all ports in group. */
242 #define ODPAT_CONTROLLER 2 /* Send copy to controller. */
243 #define ODPAT_SET_VLAN_VID 3 /* Set the 802.1q VLAN id. */
244 #define ODPAT_SET_VLAN_PCP 4 /* Set the 802.1q priority. */
245 #define ODPAT_STRIP_VLAN 5 /* Strip the 802.1q header. */
246 #define ODPAT_SET_DL_SRC 6 /* Ethernet source address. */
247 #define ODPAT_SET_DL_DST 7 /* Ethernet destination address. */
248 #define ODPAT_SET_NW_SRC 8 /* IP source address. */
249 #define ODPAT_SET_NW_DST 9 /* IP destination address. */
250 #define ODPAT_SET_TP_SRC 10 /* TCP/UDP source port. */
251 #define ODPAT_SET_TP_DST 11 /* TCP/UDP destination port. */
252 #define ODPAT_N_ACTIONS 12
254 struct odp_action_output {
255 __u16 type; /* ODPAT_OUTPUT. */
256 __u16 port; /* Output port. */
261 struct odp_action_output_group {
262 __u16 type; /* ODPAT_OUTPUT_GROUP. */
263 __u16 group; /* Group number. */
268 struct odp_action_controller {
269 __u16 type; /* ODPAT_OUTPUT_CONTROLLER. */
271 __u32 arg; /* Copied to struct odp_msg 'arg' member. */
274 /* Action structure for ODPAT_SET_VLAN_VID. */
275 struct odp_action_vlan_vid {
276 __u16 type; /* ODPAT_SET_VLAN_VID. */
277 __be16 vlan_vid; /* VLAN id. */
282 /* Action structure for ODPAT_SET_VLAN_PCP. */
283 struct odp_action_vlan_pcp {
284 __u16 type; /* ODPAT_SET_VLAN_PCP. */
285 __u8 vlan_pcp; /* VLAN priority. */
291 /* Action structure for ODPAT_SET_DL_SRC/DST. */
292 struct odp_action_dl_addr {
293 __u16 type; /* ODPAT_SET_DL_SRC/DST. */
294 __u8 dl_addr[ETH_ALEN]; /* Ethernet address. */
297 /* Action structure for ODPAT_SET_NW_SRC/DST. */
298 struct odp_action_nw_addr {
299 __u16 type; /* ODPAT_SET_TW_SRC/DST. */
301 __be32 nw_addr; /* IP address. */
304 /* Action structure for ODPAT_SET_TP_SRC/DST. */
305 struct odp_action_tp_port {
306 __u16 type; /* ODPAT_SET_TP_SRC/DST. */
307 __be16 tp_port; /* TCP/UDP port. */
314 struct odp_action_output output;
315 struct odp_action_output_group output_group;
316 struct odp_action_controller controller;
317 struct odp_action_vlan_vid vlan_vid;
318 struct odp_action_vlan_pcp vlan_pcp;
319 struct odp_action_dl_addr dl_addr;
320 struct odp_action_nw_addr nw_addr;
321 struct odp_action_tp_port tp_port;
329 union odp_action *actions;
336 /* Values below this cutoff are 802.3 packets and the two bytes
337 * following MAC addresses are used as a frame length. Otherwise, the
338 * two bytes are used as the Ethernet type.
340 #define ODP_DL_TYPE_ETH2_CUTOFF 0x0600
342 /* Value of dl_type to indicate that the frame does not include an
345 #define ODP_DL_TYPE_NOT_ETH_TYPE 0x05ff
347 /* The VLAN id is 12-bits, so we can use the entire 16 bits to indicate
348 * special conditions. All ones indicates that no VLAN id was set.
350 #define ODP_VLAN_NONE 0xffff
352 #endif /* openvswitch/datapath-protocol.h */