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