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