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