include/openvswitch/datapath-protocol.h

   1 /*
   2  * Copyright (c) 2009, 2010 Nicira Networks.
   3  *
   4  * This file is offered under your choice of two licenses: Apache 2.0 or GNU
   5  * GPL 2.0 or later.  The permission statements for each of these licenses is
   6  * given below.  You may license your modifications to this file under either
   7  * of these licenses or both.  If you wish to license your modifications under
   8  * only one of these licenses, delete the permission text for the other
   9  * license.
  10  *
  11  * ----------------------------------------------------------------------
  12  * Licensed under the Apache License, Version 2.0 (the "License");
  13  * you may not use this file except in compliance with the License.
  14  * You may obtain a copy of the License at:
  15  *
  16  *     http://www.apache.org/licenses/LICENSE-2.0
  17  *
  18  * Unless required by applicable law or agreed to in writing, software
  19  * distributed under the License is distributed on an "AS IS" BASIS,
  20  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  21  * See the License for the specific language governing permissions and
  22  * limitations under the License.
  23  * ----------------------------------------------------------------------
  24  * This program is free software; you can redistribute it and/or modify
  25  * it under the terms of the GNU General Public License as published by
  26  * the Free Software Foundation; either version 2 of the License, or
  27  * (at your option) any later version.
  28  *
  29  * This program is distributed in the hope that it will be useful,
  30  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  * GNU General Public License for more details.
  33  *
  34  * You should have received a copy of the GNU General Public License along
  35  * with this program; if not, write to the Free Software Foundation, Inc.,
  36  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  37  * ----------------------------------------------------------------------
  38  */
  39
  40 /* Protocol between userspace and kernel datapath. */
  41
  42 #ifndef OPENVSWITCH_DATAPATH_PROTOCOL_H
  43 #define OPENVSWITCH_DATAPATH_PROTOCOL_H 1
  44
  45 #ifdef __KERNEL__
  46 #include <linux/types.h>
  47 #else
  48 #include <sys/types.h>
  49 #endif
  50 #include <linux/if_ether.h>
  51
  52 #define ODP_MAX 256             /* Maximum number of datapaths. */
  53
  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)
  57
  58 #define ODP_GET_DROP_FRAGS      _IOW('O', 3, int)
  59 #define ODP_SET_DROP_FRAGS      _IOR('O', 4, int)
  60
  61 #define ODP_GET_LISTEN_MASK     _IOW('O', 5, int)
  62 #define ODP_SET_LISTEN_MASK     _IOR('O', 6, int)
  63
  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)
  68
  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)
  71
  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)
  77
  78 #define ODP_EXECUTE             _IOR('O', 18, struct odp_execute)
  79
  80 #define ODP_SET_SFLOW_PROBABILITY _IOR('O', 19, int)
  81 #define ODP_GET_SFLOW_PROBABILITY _IOW('O', 20, int)
  82
  83 struct odp_stats {
  84     /* Flows. */
  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. */
  88
  89     /* Ports. */
  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. */
  93     __u16 reserved;
  94
  95     /* Lookups. */
  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. */
 100
 101     /* Queues. */
 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. */
 105 };
 106
 107 /* Logical ports. */
 108 #define ODPP_LOCAL      ((__u16)0)
 109 #define ODPP_NONE       ((__u16)-1)
 110 #define ODPP_NORMAL     ((__u16)-2)
 111
 112 /* Listening channels. */
 113 #define _ODPL_MISS_NR   0       /* Packet missed in flow table. */
 114 #define ODPL_MISS       (1 << _ODPL_MISS_NR)
 115 #define _ODPL_ACTION_NR 1       /* Packet output to ODPP_CONTROLLER. */
 116 #define ODPL_ACTION     (1 << _ODPL_ACTION_NR)
 117 #define _ODPL_SFLOW_NR  2       /* sFlow samples. */
 118 #define ODPL_SFLOW      (1 << _ODPL_SFLOW_NR)
 119 #define ODPL_ALL        (ODPL_MISS | ODPL_ACTION | ODPL_SFLOW)
 120
 121 /**
 122  * struct odp_msg - format of messages read from datapath fd.
 123  * @type: One of the %_ODPL_* constants.
 124  * @length: Total length of message, including this header.
 125  * @port: Port that received the packet embedded in this message.
 126  * @reserved: Not currently used.  Should be set to 0.
 127  * @arg: Argument value whose meaning depends on @type.
 128  *
 129  * For @type == %_ODPL_MISS_NR, the header is followed by packet data.  The
 130  * @arg member is unused and set to 0.
 131  *
 132  * For @type == %_ODPL_ACTION_NR, the header is followed by packet data.  The
 133  * @arg member is copied from the &struct odp_action_controller that caused
 134  * the &struct odp_msg to be composed.
 135  *
 136  * For @type == %_ODPL_SFLOW_NR, the header is followed by &struct
 137  * odp_sflow_sample_header, then by an array of &union odp_action (the number
 138  * of which is specified in &struct odp_sflow_sample_header), then by packet
 139  * data.
 140  */
 141 struct odp_msg {
 142     __u32 type;
 143     __u32 length;
 144     __u16 port;
 145     __u16 reserved;
 146     __u32 arg;
 147 };
 148
 149 /**
 150  * struct odp_sflow_sample_header - header added to sFlow sampled packet.
 151  * @sample_pool: Number of packets that were candidates for sFlow sampling,
 152  * regardless of whether they were actually chosen and sent down to userspace.
 153  * @n_actions: Number of "union odp_action"s immediately following this header.
 154  *
 155  * This header follows &struct odp_msg when that structure's @type is
 156  * %_ODPL_SFLOW_NR, and it is itself followed by an array of &union odp_action
 157  * (the number of which is specified in @n_actions) and then by packet data.
 158  */
 159 struct odp_sflow_sample_header {
 160     __u32 sample_pool;
 161     __u32 n_actions;
 162 };
 163
 164 #define ODP_PORT_INTERNAL (1 << 0) /* This port is simulated. */
 165 struct odp_port {
 166     char devname[16];           /* IFNAMSIZ */
 167     __u16 port;
 168     __u16 flags;
 169     __u32 reserved2;
 170 };
 171
 172 struct odp_portvec {
 173     struct odp_port *ports;
 174     int n_ports;
 175 };
 176
 177 struct odp_port_group {
 178     __u16 *ports;
 179     __u16 n_ports;                /* Number of ports. */
 180     __u16 group;                  /* Group number. */
 181 };
 182
 183 struct odp_flow_stats {
 184     __u64 n_packets;            /* Number of matched packets. */
 185     __u64 n_bytes;              /* Number of matched bytes. */
 186     __u64 used_sec;             /* Time last used. */
 187     __u32 used_nsec;
 188     __u8 tcp_flags;
 189     __u8 ip_tos;
 190     __u16 error;                /* Used by ODP_FLOW_GET. */
 191 };
 192
 193 struct odp_flow_key {
 194     __be32 nw_src;               /* IP source address. */
 195     __be32 nw_dst;               /* IP destination address. */
 196     __u16  in_port;              /* Input switch port. */
 197     __be16 dl_vlan;              /* Input VLAN. */
 198     __be16 dl_type;              /* Ethernet frame type. */
 199     __be16 tp_src;               /* TCP/UDP source port. */
 200     __be16 tp_dst;               /* TCP/UDP destination port. */
 201     __u8   dl_src[ETH_ALEN];     /* Ethernet source address. */
 202     __u8   dl_dst[ETH_ALEN];     /* Ethernet destination address. */
 203     __u8   nw_proto;             /* IP protocol or lower 8 bits of
 204                                     ARP opcode. */
 205     __u8   dl_vlan_pcp;          /* Input VLAN priority. */
 206     __u8   nw_tos;               /* IP ToS (DSCP field, 6 bits). */
 207     __u8   reserved[3];          /* Align to 32-bits...must be zeroed. */
 208 };
 209
 210 /* Flags for ODP_FLOW. */
 211 #define ODPFF_ZERO_TCP_FLAGS (1 << 0) /* Zero the TCP flags. */
 212
 213 struct odp_flow {
 214     struct odp_flow_stats stats;
 215     struct odp_flow_key key;
 216     union odp_action *actions;
 217     __u32 n_actions;
 218     __u32 flags;
 219 };
 220
 221 /* Flags for ODP_FLOW_PUT. */
 222 #define ODPPF_CREATE        (1 << 0) /* Allow creating a new flow. */
 223 #define ODPPF_MODIFY        (1 << 1) /* Allow modifying an existing flow. */
 224 #define ODPPF_ZERO_STATS    (1 << 2) /* Zero the stats of an existing flow. */
 225
 226 /* ODP_FLOW_PUT argument. */
 227 struct odp_flow_put {
 228     struct odp_flow flow;
 229     __u32 flags;
 230 };
 231
 232 struct odp_flowvec {
 233     struct odp_flow *flows;
 234     int n_flows;
 235 };
 236
 237 /* The VLAN id is 12 bits, so we can use the entire 16 bits to indicate
 238  * special conditions.  All ones is used to match that no VLAN id was
 239  * set. */
 240 #define ODP_VLAN_NONE      0xffff
 241
 242 /* Action types. */
 243 #define ODPAT_OUTPUT            0    /* Output to switch port. */
 244 #define ODPAT_OUTPUT_GROUP      1    /* Output to all ports in group. */
 245 #define ODPAT_CONTROLLER        2    /* Send copy to controller. */
 246 #define ODPAT_SET_VLAN_VID      3    /* Set the 802.1q VLAN id. */
 247 #define ODPAT_SET_VLAN_PCP      4    /* Set the 802.1q priority. */
 248 #define ODPAT_STRIP_VLAN        5    /* Strip the 802.1q header. */
 249 #define ODPAT_SET_DL_SRC        6    /* Ethernet source address. */
 250 #define ODPAT_SET_DL_DST        7    /* Ethernet destination address. */
 251 #define ODPAT_SET_NW_SRC        8    /* IP source address. */
 252 #define ODPAT_SET_NW_DST        9    /* IP destination address. */
 253 #define ODPAT_SET_NW_TOS        10   /* IP ToS/DSCP field (6 bits). */
 254 #define ODPAT_SET_TP_SRC        11   /* TCP/UDP source port. */
 255 #define ODPAT_SET_TP_DST        12   /* TCP/UDP destination port. */
 256 #define ODPAT_N_ACTIONS         13
 257
 258 struct odp_action_output {
 259     __u16 type;                  /* ODPAT_OUTPUT. */
 260     __u16 port;                  /* Output port. */
 261     __u16 reserved1;
 262     __u16 reserved2;
 263 };
 264
 265 struct odp_action_output_group {
 266     __u16 type;                 /* ODPAT_OUTPUT_GROUP. */
 267     __u16 group;                /* Group number. */
 268     __u16 reserved1;
 269     __u16 reserved2;
 270 };
 271
 272 struct odp_action_controller {
 273     __u16 type;                 /* ODPAT_OUTPUT_CONTROLLER. */
 274     __u16 reserved;
 275     __u32 arg;                  /* Copied to struct odp_msg 'arg' member. */
 276 };
 277
 278 /* Action structure for ODPAT_SET_VLAN_VID. */
 279 struct odp_action_vlan_vid {
 280     __u16 type;                  /* ODPAT_SET_VLAN_VID. */
 281     __be16 vlan_vid;             /* VLAN id. */
 282     __u16 reserved1;
 283     __u16 reserved2;
 284 };
 285
 286 /* Action structure for ODPAT_SET_VLAN_PCP. */
 287 struct odp_action_vlan_pcp {
 288     __u16 type;                  /* ODPAT_SET_VLAN_PCP. */
 289     __u8 vlan_pcp;               /* VLAN priority. */
 290     __u8 reserved1;
 291     __u16 reserved2;
 292     __u16 reserved3;
 293 };
 294
 295 /* Action structure for ODPAT_SET_DL_SRC/DST. */
 296 struct odp_action_dl_addr {
 297     __u16 type;                  /* ODPAT_SET_DL_SRC/DST. */
 298     __u8 dl_addr[ETH_ALEN];      /* Ethernet address. */
 299 };
 300
 301 /* Action structure for ODPAT_SET_NW_SRC/DST. */
 302 struct odp_action_nw_addr {
 303     __u16 type;                 /* ODPAT_SET_TW_SRC/DST. */
 304     __u16 reserved;
 305     __be32 nw_addr;             /* IP address. */
 306 };
 307
 308 struct odp_action_nw_tos {
 309     __u16 type;                  /* ODPAT_SET_NW_TOS. */
 310     __u8 nw_tos;                 /* IP ToS/DSCP field (6 bits). */
 311     __u8 reserved1;
 312     __u16 reserved2;
 313     __u16 reserved3;
 314 };
 315
 316 /* Action structure for ODPAT_SET_TP_SRC/DST. */
 317 struct odp_action_tp_port {
 318     __u16 type;                  /* ODPAT_SET_TP_SRC/DST. */
 319     __be16 tp_port;              /* TCP/UDP port. */
 320     __u16 reserved1;
 321     __u16 reserved2;
 322 };
 323
 324 union odp_action {
 325     __u16 type;
 326     struct odp_action_output output;
 327     struct odp_action_output_group output_group;
 328     struct odp_action_controller controller;
 329     struct odp_action_vlan_vid vlan_vid;
 330     struct odp_action_vlan_pcp vlan_pcp;
 331     struct odp_action_dl_addr dl_addr;
 332     struct odp_action_nw_addr nw_addr;
 333     struct odp_action_nw_tos nw_tos;
 334     struct odp_action_tp_port tp_port;
 335 };
 336
 337 struct odp_execute {
 338     __u16 in_port;
 339     __u16 reserved1;
 340     __u32 reserved2;
 341
 342     union odp_action *actions;
 343     __u32 n_actions;
 344
 345     const void *data;
 346     __u32 length;
 347 };
 348
 349 /* Values below this cutoff are 802.3 packets and the two bytes
 350  * following MAC addresses are used as a frame length.  Otherwise, the
 351  * two bytes are used as the Ethernet type.
 352  */
 353 #define ODP_DL_TYPE_ETH2_CUTOFF   0x0600
 354
 355 /* Value of dl_type to indicate that the frame does not include an
 356  * Ethernet type.
 357  */
 358 #define ODP_DL_TYPE_NOT_ETH_TYPE  0x05ff
 359
 360 /* The VLAN id is 12-bits, so we can use the entire 16 bits to indicate
 361  * special conditions.  All ones indicates that no VLAN id was set.
 362  */
 363 #define ODP_VLAN_NONE      0xffff
 364
 365 #endif /* openvswitch/datapath-protocol.h */