include/linux/ip_vs.h

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