1 /* 2 * IP Virtual Server 3 * data structure and functionality definitions 4 */ 5 6 #ifndef _IP_VS_H 7 #define _IP_VS_H 8 9 #include <linux/types.h> /* For __beXX types in userland */ 10 11 #define IP_VS_VERSION_CODE 0x010201 12 #define NVERSION(version) \ 13 (version >> 16) & 0xFF, \ 14 (version >> 8) & 0xFF, \ 15 version & 0xFF 16 17 /* 18 * Virtual Service Flags 19 */ 20 #define IP_VS_SVC_F_PERSISTENT 0x0001 /* persistent port */ 21 #define IP_VS_SVC_F_HASHED 0x0002 /* hashed entry */ 22 #define IP_VS_SVC_F_ONEPACKET 0x0004 /* one-packet scheduling */ 23 #define IP_VS_SVC_F_SCHED1 0x0008 /* scheduler flag 1 */ 24 #define IP_VS_SVC_F_SCHED2 0x0010 /* scheduler flag 2 */ 25 #define IP_VS_SVC_F_SCHED3 0x0020 /* scheduler flag 3 */ 26 27 #define IP_VS_SVC_F_SCHED_SH_FALLBACK IP_VS_SVC_F_SCHED1 /* SH fallback */ 28 #define IP_VS_SVC_F_SCHED_SH_PORT IP_VS_SVC_F_SCHED2 /* SH use port */ 29 30 /* 31 * Destination Server Flags 32 */ 33 #define IP_VS_DEST_F_AVAILABLE 0x0001 /* server is available */ 34 #define IP_VS_DEST_F_OVERLOAD 0x0002 /* server is overloaded */ 35 36 /* 37 * IPVS sync daemon states 38 */ 39 #define IP_VS_STATE_NONE 0x0000 /* daemon is stopped */ 40 #define IP_VS_STATE_MASTER 0x0001 /* started as master */ 41 #define IP_VS_STATE_BACKUP 0x0002 /* started as backup */ 42 43 /* 44 * IPVS socket options 45 */ 46 #define IP_VS_BASE_CTL (64+1024+64) /* base */ 47 48 #define IP_VS_SO_SET_NONE IP_VS_BASE_CTL /* just peek */ 49 #define IP_VS_SO_SET_INSERT (IP_VS_BASE_CTL+1) 50 #define IP_VS_SO_SET_ADD (IP_VS_BASE_CTL+2) 51 #define IP_VS_SO_SET_EDIT (IP_VS_BASE_CTL+3) 52 #define IP_VS_SO_SET_DEL (IP_VS_BASE_CTL+4) 53 #define IP_VS_SO_SET_FLUSH (IP_VS_BASE_CTL+5) 54 #define IP_VS_SO_SET_LIST (IP_VS_BASE_CTL+6) 55 #define IP_VS_SO_SET_ADDDEST (IP_VS_BASE_CTL+7) 56 #define IP_VS_SO_SET_DELDEST (IP_VS_BASE_CTL+8) 57 #define IP_VS_SO_SET_EDITDEST (IP_VS_BASE_CTL+9) 58 #define IP_VS_SO_SET_TIMEOUT (IP_VS_BASE_CTL+10) 59 #define IP_VS_SO_SET_STARTDAEMON (IP_VS_BASE_CTL+11) 60 #define IP_VS_SO_SET_STOPDAEMON (IP_VS_BASE_CTL+12) 61 #define IP_VS_SO_SET_RESTORE (IP_VS_BASE_CTL+13) 62 #define IP_VS_SO_SET_SAVE (IP_VS_BASE_CTL+14) 63 #define IP_VS_SO_SET_ZERO (IP_VS_BASE_CTL+15) 64 #define IP_VS_SO_SET_MAX IP_VS_SO_SET_ZERO 65 66 #define IP_VS_SO_GET_VERSION IP_VS_BASE_CTL 67 #define IP_VS_SO_GET_INFO (IP_VS_BASE_CTL+1) 68 #define IP_VS_SO_GET_SERVICES (IP_VS_BASE_CTL+2) 69 #define IP_VS_SO_GET_SERVICE (IP_VS_BASE_CTL+3) 70 #define IP_VS_SO_GET_DESTS (IP_VS_BASE_CTL+4) 71 #define IP_VS_SO_GET_DEST (IP_VS_BASE_CTL+5) /* not used now */ 72 #define IP_VS_SO_GET_TIMEOUT (IP_VS_BASE_CTL+6) 73 #define IP_VS_SO_GET_DAEMON (IP_VS_BASE_CTL+7) 74 #define IP_VS_SO_GET_MAX IP_VS_SO_GET_DAEMON 75 76 77 /* 78 * IPVS Connection Flags 79 * Only flags 0..15 are sent to backup server 80 */ 81 #define IP_VS_CONN_F_FWD_MASK 0x0007 /* mask for the fwd methods */ 82 #define IP_VS_CONN_F_MASQ 0x0000 /* masquerading/NAT */ 83 #define IP_VS_CONN_F_LOCALNODE 0x0001 /* local node */ 84 #define IP_VS_CONN_F_TUNNEL 0x0002 /* tunneling */ 85 #define IP_VS_CONN_F_DROUTE 0x0003 /* direct routing */ 86 #define IP_VS_CONN_F_BYPASS 0x0004 /* cache bypass */ 87 #define IP_VS_CONN_F_SYNC 0x0020 /* entry created by sync */ 88 #define IP_VS_CONN_F_HASHED 0x0040 /* hashed entry */ 89 #define IP_VS_CONN_F_NOOUTPUT 0x0080 /* no output packets */ 90 #define IP_VS_CONN_F_INACTIVE 0x0100 /* not established */ 91 #define IP_VS_CONN_F_OUT_SEQ 0x0200 /* must do output seq adjust */ 92 #define IP_VS_CONN_F_IN_SEQ 0x0400 /* must do input seq adjust */ 93 #define IP_VS_CONN_F_SEQ_MASK 0x0600 /* in/out sequence mask */ 94 #define IP_VS_CONN_F_NO_CPORT 0x0800 /* no client port set yet */ 95 #define IP_VS_CONN_F_TEMPLATE 0x1000 /* template, not connection */ 96 #define IP_VS_CONN_F_ONE_PACKET 0x2000 /* forward only one packet */ 97 98 /* Initial bits allowed in backup server */ 99 #define IP_VS_CONN_F_BACKUP_MASK (IP_VS_CONN_F_FWD_MASK | \ 100 IP_VS_CONN_F_NOOUTPUT | \ 101 IP_VS_CONN_F_INACTIVE | \ 102 IP_VS_CONN_F_SEQ_MASK | \ 103 IP_VS_CONN_F_NO_CPORT | \ 104 IP_VS_CONN_F_TEMPLATE \ 105 ) 106 107 /* Bits allowed to update in backup server */ 108 #define IP_VS_CONN_F_BACKUP_UPD_MASK (IP_VS_CONN_F_INACTIVE | \ 109 IP_VS_CONN_F_SEQ_MASK) 110 111 /* Flags that are not sent to backup server start from bit 16 */ 112 #define IP_VS_CONN_F_NFCT (1 << 16) /* use netfilter conntrack */ 113 114 /* Connection flags from destination that can be changed by user space */ 115 #define IP_VS_CONN_F_DEST_MASK (IP_VS_CONN_F_FWD_MASK | \ 116 IP_VS_CONN_F_ONE_PACKET | \ 117 IP_VS_CONN_F_NFCT | \ 118 0) 119 120 #define IP_VS_SCHEDNAME_MAXLEN 16 121 #define IP_VS_PENAME_MAXLEN 16 122 #define IP_VS_IFNAME_MAXLEN 16 123 124 #define IP_VS_PEDATA_MAXLEN 255 125 126 /* 127 * The struct ip_vs_service_user and struct ip_vs_dest_user are 128 * used to set IPVS rules through setsockopt. 129 */ 130 struct ip_vs_service_user { 131 /* virtual service addresses */ 132 __u16 protocol; 133 __be32 addr; /* virtual ip address */ 134 __be16 port; 135 __u32 fwmark; /* firwall mark of service */ 136 137 /* virtual service options */ 138 char sched_name[IP_VS_SCHEDNAME_MAXLEN]; 139 unsigned int flags; /* virtual service flags */ 140 unsigned int timeout; /* persistent timeout in sec */ 141 __be32 netmask; /* persistent netmask */ 142 }; 143 144 145 struct ip_vs_dest_user { 146 /* destination server address */ 147 __be32 addr; 148 __be16 port; 149 150 /* real server options */ 151 unsigned int conn_flags; /* connection flags */ 152 int weight; /* destination weight */ 153 154 /* thresholds for active connections */ 155 __u32 u_threshold; /* upper threshold */ 156 __u32 l_threshold; /* lower threshold */ 157 }; 158 159 160 /* 161 * IPVS statistics object (for user space) 162 */ 163 struct ip_vs_stats_user { 164 __u32 conns; /* connections scheduled */ 165 __u32 inpkts; /* incoming packets */ 166 __u32 outpkts; /* outgoing packets */ 167 __u64 inbytes; /* incoming bytes */ 168 __u64 outbytes; /* outgoing bytes */ 169 170 __u32 cps; /* current connection rate */ 171 __u32 inpps; /* current in packet rate */ 172 __u32 outpps; /* current out packet rate */ 173 __u32 inbps; /* current in byte rate */ 174 __u32 outbps; /* current out byte rate */ 175 }; 176 177 178 /* The argument to IP_VS_SO_GET_INFO */ 179 struct ip_vs_getinfo { 180 /* version number */ 181 unsigned int version; 182 183 /* size of connection hash table */ 184 unsigned int size; 185 186 /* number of virtual services */ 187 unsigned int num_services; 188 }; 189 190 191 /* The argument to IP_VS_SO_GET_SERVICE */ 192 struct ip_vs_service_entry { 193 /* which service: user fills in these */ 194 __u16 protocol; 195 __be32 addr; /* virtual address */ 196 __be16 port; 197 __u32 fwmark; /* firwall mark of service */ 198 199 /* service options */ 200 char sched_name[IP_VS_SCHEDNAME_MAXLEN]; 201 unsigned int flags; /* virtual service flags */ 202 unsigned int timeout; /* persistent timeout */ 203 __be32 netmask; /* persistent netmask */ 204 205 /* number of real servers */ 206 unsigned int num_dests; 207 208 /* statistics */ 209 struct ip_vs_stats_user stats; 210 }; 211 212 213 struct ip_vs_dest_entry { 214 __be32 addr; /* destination address */ 215 __be16 port; 216 unsigned int conn_flags; /* connection flags */ 217 int weight; /* destination weight */ 218 219 __u32 u_threshold; /* upper threshold */ 220 __u32 l_threshold; /* lower threshold */ 221 222 __u32 activeconns; /* active connections */ 223 __u32 inactconns; /* inactive connections */ 224 __u32 persistconns; /* persistent connections */ 225 226 /* statistics */ 227 struct ip_vs_stats_user stats; 228 }; 229 230 231 /* The argument to IP_VS_SO_GET_DESTS */ 232 struct ip_vs_get_dests { 233 /* which service: user fills in these */ 234 __u16 protocol; 235 __be32 addr; /* virtual address */ 236 __be16 port; 237 __u32 fwmark; /* firwall mark of service */ 238 239 /* number of real servers */ 240 unsigned int num_dests; 241 242 /* the real servers */ 243 struct ip_vs_dest_entry entrytable[0]; 244 }; 245 246 247 /* The argument to IP_VS_SO_GET_SERVICES */ 248 struct ip_vs_get_services { 249 /* number of virtual services */ 250 unsigned int num_services; 251 252 /* service table */ 253 struct ip_vs_service_entry entrytable[0]; 254 }; 255 256 257 /* The argument to IP_VS_SO_GET_TIMEOUT */ 258 struct ip_vs_timeout_user { 259 int tcp_timeout; 260 int tcp_fin_timeout; 261 int udp_timeout; 262 }; 263 264 265 /* The argument to IP_VS_SO_GET_DAEMON */ 266 struct ip_vs_daemon_user { 267 /* sync daemon state (master/backup) */ 268 int state; 269 270 /* multicast interface name */ 271 char mcast_ifn[IP_VS_IFNAME_MAXLEN]; 272 273 /* SyncID we belong to */ 274 int syncid; 275 }; 276 277 /* 278 * 279 * IPVS Generic Netlink interface definitions 280 * 281 */ 282 283 /* Generic Netlink family info */ 284 285 #define IPVS_GENL_NAME "IPVS" 286 #define IPVS_GENL_VERSION 0x1 287 288 struct ip_vs_flags { 289 __u32 flags; 290 __u32 mask; 291 }; 292 293 /* Generic Netlink command attributes */ 294 enum { 295 IPVS_CMD_UNSPEC = 0, 296 297 IPVS_CMD_NEW_SERVICE, /* add service */ 298 IPVS_CMD_SET_SERVICE, /* modify service */ 299 IPVS_CMD_DEL_SERVICE, /* delete service */ 300 IPVS_CMD_GET_SERVICE, /* get service info */ 301 302 IPVS_CMD_NEW_DEST, /* add destination */ 303 IPVS_CMD_SET_DEST, /* modify destination */ 304 IPVS_CMD_DEL_DEST, /* delete destination */ 305 IPVS_CMD_GET_DEST, /* get destination info */ 306 307 IPVS_CMD_NEW_DAEMON, /* start sync daemon */ 308 IPVS_CMD_DEL_DAEMON, /* stop sync daemon */ 309 IPVS_CMD_GET_DAEMON, /* get sync daemon status */ 310 311 IPVS_CMD_SET_CONFIG, /* set config settings */ 312 IPVS_CMD_GET_CONFIG, /* get config settings */ 313 314 IPVS_CMD_SET_INFO, /* only used in GET_INFO reply */ 315 IPVS_CMD_GET_INFO, /* get general IPVS info */ 316 317 IPVS_CMD_ZERO, /* zero all counters and stats */ 318 IPVS_CMD_FLUSH, /* flush services and dests */ 319 320 __IPVS_CMD_MAX, 321 }; 322 323 #define IPVS_CMD_MAX (__IPVS_CMD_MAX - 1) 324 325 /* Attributes used in the first level of commands */ 326 enum { 327 IPVS_CMD_ATTR_UNSPEC = 0, 328 IPVS_CMD_ATTR_SERVICE, /* nested service attribute */ 329 IPVS_CMD_ATTR_DEST, /* nested destination attribute */ 330 IPVS_CMD_ATTR_DAEMON, /* nested sync daemon attribute */ 331 IPVS_CMD_ATTR_TIMEOUT_TCP, /* TCP connection timeout */ 332 IPVS_CMD_ATTR_TIMEOUT_TCP_FIN, /* TCP FIN wait timeout */ 333 IPVS_CMD_ATTR_TIMEOUT_UDP, /* UDP timeout */ 334 __IPVS_CMD_ATTR_MAX, 335 }; 336 337 #define IPVS_CMD_ATTR_MAX (__IPVS_CMD_ATTR_MAX - 1) 338 339 /* 340 * Attributes used to describe a service 341 * 342 * Used inside nested attribute IPVS_CMD_ATTR_SERVICE 343 */ 344 enum { 345 IPVS_SVC_ATTR_UNSPEC = 0, 346 IPVS_SVC_ATTR_AF, /* address family */ 347 IPVS_SVC_ATTR_PROTOCOL, /* virtual service protocol */ 348 IPVS_SVC_ATTR_ADDR, /* virtual service address */ 349 IPVS_SVC_ATTR_PORT, /* virtual service port */ 350 IPVS_SVC_ATTR_FWMARK, /* firewall mark of service */ 351 352 IPVS_SVC_ATTR_SCHED_NAME, /* name of scheduler */ 353 IPVS_SVC_ATTR_FLAGS, /* virtual service flags */ 354 IPVS_SVC_ATTR_TIMEOUT, /* persistent timeout */ 355 IPVS_SVC_ATTR_NETMASK, /* persistent netmask */ 356 357 IPVS_SVC_ATTR_STATS, /* nested attribute for service stats */ 358 359 IPVS_SVC_ATTR_PE_NAME, /* name of ct retriever */ 360 361 IPVS_SVC_ATTR_STATS64, /* nested attribute for service stats */ 362 363 __IPVS_SVC_ATTR_MAX, 364 }; 365 366 #define IPVS_SVC_ATTR_MAX (__IPVS_SVC_ATTR_MAX - 1) 367 368 /* 369 * Attributes used to describe a destination (real server) 370 * 371 * Used inside nested attribute IPVS_CMD_ATTR_DEST 372 */ 373 enum { 374 IPVS_DEST_ATTR_UNSPEC = 0, 375 IPVS_DEST_ATTR_ADDR, /* real server address */ 376 IPVS_DEST_ATTR_PORT, /* real server port */ 377 378 IPVS_DEST_ATTR_FWD_METHOD, /* forwarding method */ 379 IPVS_DEST_ATTR_WEIGHT, /* destination weight */ 380 381 IPVS_DEST_ATTR_U_THRESH, /* upper threshold */ 382 IPVS_DEST_ATTR_L_THRESH, /* lower threshold */ 383 384 IPVS_DEST_ATTR_ACTIVE_CONNS, /* active connections */ 385 IPVS_DEST_ATTR_INACT_CONNS, /* inactive connections */ 386 IPVS_DEST_ATTR_PERSIST_CONNS, /* persistent connections */ 387 388 IPVS_DEST_ATTR_STATS, /* nested attribute for dest stats */ 389 390 IPVS_DEST_ATTR_ADDR_FAMILY, /* Address family of address */ 391 392 IPVS_DEST_ATTR_STATS64, /* nested attribute for dest stats */ 393 394 __IPVS_DEST_ATTR_MAX, 395 }; 396 397 #define IPVS_DEST_ATTR_MAX (__IPVS_DEST_ATTR_MAX - 1) 398 399 /* 400 * Attributes describing a sync daemon 401 * 402 * Used inside nested attribute IPVS_CMD_ATTR_DAEMON 403 */ 404 enum { 405 IPVS_DAEMON_ATTR_UNSPEC = 0, 406 IPVS_DAEMON_ATTR_STATE, /* sync daemon state (master/backup) */ 407 IPVS_DAEMON_ATTR_MCAST_IFN, /* multicast interface name */ 408 IPVS_DAEMON_ATTR_SYNC_ID, /* SyncID we belong to */ 409 IPVS_DAEMON_ATTR_SYNC_MAXLEN, /* UDP Payload Size */ 410 IPVS_DAEMON_ATTR_MCAST_GROUP, /* IPv4 Multicast Address */ 411 IPVS_DAEMON_ATTR_MCAST_GROUP6, /* IPv6 Multicast Address */ 412 IPVS_DAEMON_ATTR_MCAST_PORT, /* Multicast Port (base) */ 413 IPVS_DAEMON_ATTR_MCAST_TTL, /* Multicast TTL */ 414 __IPVS_DAEMON_ATTR_MAX, 415 }; 416 417 #define IPVS_DAEMON_ATTR_MAX (__IPVS_DAEMON_ATTR_MAX - 1) 418 419 /* 420 * Attributes used to describe service or destination entry statistics 421 * 422 * Used inside nested attributes IPVS_SVC_ATTR_STATS, IPVS_DEST_ATTR_STATS, 423 * IPVS_SVC_ATTR_STATS64 and IPVS_DEST_ATTR_STATS64. 424 */ 425 enum { 426 IPVS_STATS_ATTR_UNSPEC = 0, 427 IPVS_STATS_ATTR_CONNS, /* connections scheduled */ 428 IPVS_STATS_ATTR_INPKTS, /* incoming packets */ 429 IPVS_STATS_ATTR_OUTPKTS, /* outgoing packets */ 430 IPVS_STATS_ATTR_INBYTES, /* incoming bytes */ 431 IPVS_STATS_ATTR_OUTBYTES, /* outgoing bytes */ 432 433 IPVS_STATS_ATTR_CPS, /* current connection rate */ 434 IPVS_STATS_ATTR_INPPS, /* current in packet rate */ 435 IPVS_STATS_ATTR_OUTPPS, /* current out packet rate */ 436 IPVS_STATS_ATTR_INBPS, /* current in byte rate */ 437 IPVS_STATS_ATTR_OUTBPS, /* current out byte rate */ 438 IPVS_STATS_ATTR_PAD, 439 __IPVS_STATS_ATTR_MAX, 440 }; 441 442 #define IPVS_STATS_ATTR_MAX (__IPVS_STATS_ATTR_MAX - 1) 443 444 /* Attributes used in response to IPVS_CMD_GET_INFO command */ 445 enum { 446 IPVS_INFO_ATTR_UNSPEC = 0, 447 IPVS_INFO_ATTR_VERSION, /* IPVS version number */ 448 IPVS_INFO_ATTR_CONN_TAB_SIZE, /* size of connection hash table */ 449 __IPVS_INFO_ATTR_MAX, 450 }; 451 452 #define IPVS_INFO_ATTR_MAX (__IPVS_INFO_ATTR_MAX - 1) 453 454 #endif /* _IP_VS_H */ 455