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 /* Initial bits allowed in backup server */
  93 #define IP_VS_CONN_F_BACKUP_MASK (IP_VS_CONN_F_FWD_MASK | \
  94                                   IP_VS_CONN_F_NOOUTPUT | \
  95                                   IP_VS_CONN_F_INACTIVE | \
  96                                   IP_VS_CONN_F_SEQ_MASK | \
  97                                   IP_VS_CONN_F_NO_CPORT | \
  98                                   IP_VS_CONN_F_TEMPLATE \
  99                                  )
 100
 101 /* Bits allowed to update in backup server */
 102 #define IP_VS_CONN_F_BACKUP_UPD_MASK (IP_VS_CONN_F_INACTIVE | \
 103                                       IP_VS_CONN_F_SEQ_MASK)
 104
 105 /* Flags that are not sent to backup server start from bit 16 */
 106 #define IP_VS_CONN_F_NFCT       (1 << 16)       /* use netfilter conntrack */
 107
 108 /* Connection flags from destination that can be changed by user space */
 109 #define IP_VS_CONN_F_DEST_MASK (IP_VS_CONN_F_FWD_MASK | \
 110                                 IP_VS_CONN_F_ONE_PACKET | \
 111                                 IP_VS_CONN_F_NFCT | \
 112                                 0)
 113
 114 #define IP_VS_SCHEDNAME_MAXLEN  16
 115 #define IP_VS_PENAME_MAXLEN     16
 116 #define IP_VS_IFNAME_MAXLEN     16
 117
 118 #define IP_VS_PEDATA_MAXLEN     255
 119
 120 /*
 121  *      The struct ip_vs_service_user and struct ip_vs_dest_user are
 122  *      used to set IPVS rules through setsockopt.
 123  */
 124 struct ip_vs_service_user {
 125         /* virtual service addresses */
 126         __u16           protocol;
 127         __be32                  addr;           /* virtual ip address */
 128         __be16                  port;
 129         __u32           fwmark;         /* firwall mark of service */
 130
 131         /* virtual service options */
 132         char                    sched_name[IP_VS_SCHEDNAME_MAXLEN];
 133         unsigned int            flags;          /* virtual service flags */
 134         unsigned int            timeout;        /* persistent timeout in sec */
 135         __be32                  netmask;        /* persistent netmask */
 136 };
 137
 138
 139 struct ip_vs_dest_user {
 140         /* destination server address */
 141         __be32                  addr;
 142         __be16                  port;
 143
 144         /* real server options */
 145         unsigned int            conn_flags;     /* connection flags */
 146         int                     weight;         /* destination weight */
 147
 148         /* thresholds for active connections */
 149         __u32           u_threshold;    /* upper threshold */
 150         __u32           l_threshold;    /* lower threshold */
 151 };
 152
 153
 154 /*
 155  *      IPVS statistics object (for user space)
 156  */
 157 struct ip_vs_stats_user {
 158         __u32                   conns;          /* connections scheduled */
 159         __u32                   inpkts;         /* incoming packets */
 160         __u32                   outpkts;        /* outgoing packets */
 161         __u64                   inbytes;        /* incoming bytes */
 162         __u64                   outbytes;       /* outgoing bytes */
 163
 164         __u32                   cps;            /* current connection rate */
 165         __u32                   inpps;          /* current in packet rate */
 166         __u32                   outpps;         /* current out packet rate */
 167         __u32                   inbps;          /* current in byte rate */
 168         __u32                   outbps;         /* current out byte rate */
 169 };
 170
 171
 172 /* The argument to IP_VS_SO_GET_INFO */
 173 struct ip_vs_getinfo {
 174         /* version number */
 175         unsigned int            version;
 176
 177         /* size of connection hash table */
 178         unsigned int            size;
 179
 180         /* number of virtual services */
 181         unsigned int            num_services;
 182 };
 183
 184
 185 /* The argument to IP_VS_SO_GET_SERVICE */
 186 struct ip_vs_service_entry {
 187         /* which service: user fills in these */
 188         __u16           protocol;
 189         __be32                  addr;           /* virtual address */
 190         __be16                  port;
 191         __u32           fwmark;         /* firwall mark of service */
 192
 193         /* service options */
 194         char                    sched_name[IP_VS_SCHEDNAME_MAXLEN];
 195         unsigned int            flags;          /* virtual service flags */
 196         unsigned int            timeout;        /* persistent timeout */
 197         __be32                  netmask;        /* persistent netmask */
 198
 199         /* number of real servers */
 200         unsigned int            num_dests;
 201
 202         /* statistics */
 203         struct ip_vs_stats_user stats;
 204 };
 205
 206
 207 struct ip_vs_dest_entry {
 208         __be32                  addr;           /* destination address */
 209         __be16                  port;
 210         unsigned int            conn_flags;     /* connection flags */
 211         int                     weight;         /* destination weight */
 212
 213         __u32           u_threshold;    /* upper threshold */
 214         __u32           l_threshold;    /* lower threshold */
 215
 216         __u32           activeconns;    /* active connections */
 217         __u32           inactconns;     /* inactive connections */
 218         __u32           persistconns;   /* persistent connections */
 219
 220         /* statistics */
 221         struct ip_vs_stats_user stats;
 222 };
 223
 224
 225 /* The argument to IP_VS_SO_GET_DESTS */
 226 struct ip_vs_get_dests {
 227         /* which service: user fills in these */
 228         __u16           protocol;
 229         __be32                  addr;           /* virtual address */
 230         __be16                  port;
 231         __u32           fwmark;         /* firwall mark of service */
 232
 233         /* number of real servers */
 234         unsigned int            num_dests;
 235
 236         /* the real servers */
 237         struct ip_vs_dest_entry entrytable[0];
 238 };
 239
 240
 241 /* The argument to IP_VS_SO_GET_SERVICES */
 242 struct ip_vs_get_services {
 243         /* number of virtual services */
 244         unsigned int            num_services;
 245
 246         /* service table */
 247         struct ip_vs_service_entry entrytable[0];
 248 };
 249
 250
 251 /* The argument to IP_VS_SO_GET_TIMEOUT */
 252 struct ip_vs_timeout_user {
 253         int                     tcp_timeout;
 254         int                     tcp_fin_timeout;
 255         int                     udp_timeout;
 256 };
 257
 258
 259 /* The argument to IP_VS_SO_GET_DAEMON */
 260 struct ip_vs_daemon_user {
 261         /* sync daemon state (master/backup) */
 262         int                     state;
 263
 264         /* multicast interface name */
 265         char                    mcast_ifn[IP_VS_IFNAME_MAXLEN];
 266
 267         /* SyncID we belong to */
 268         int                     syncid;
 269 };
 270
 271 /*
 272  *
 273  * IPVS Generic Netlink interface definitions
 274  *
 275  */
 276
 277 /* Generic Netlink family info */
 278
 279 #define IPVS_GENL_NAME          "IPVS"
 280 #define IPVS_GENL_VERSION       0x1
 281
 282 struct ip_vs_flags {
 283         __be32 flags;
 284         __be32 mask;
 285 };
 286
 287 /* Generic Netlink command attributes */
 288 enum {
 289         IPVS_CMD_UNSPEC = 0,
 290
 291         IPVS_CMD_NEW_SERVICE,           /* add service */
 292         IPVS_CMD_SET_SERVICE,           /* modify service */
 293         IPVS_CMD_DEL_SERVICE,           /* delete service */
 294         IPVS_CMD_GET_SERVICE,           /* get service info */
 295
 296         IPVS_CMD_NEW_DEST,              /* add destination */
 297         IPVS_CMD_SET_DEST,              /* modify destination */
 298         IPVS_CMD_DEL_DEST,              /* delete destination */
 299         IPVS_CMD_GET_DEST,              /* get destination info */
 300
 301         IPVS_CMD_NEW_DAEMON,            /* start sync daemon */
 302         IPVS_CMD_DEL_DAEMON,            /* stop sync daemon */
 303         IPVS_CMD_GET_DAEMON,            /* get sync daemon status */
 304
 305         IPVS_CMD_SET_CONFIG,            /* set config settings */
 306         IPVS_CMD_GET_CONFIG,            /* get config settings */
 307
 308         IPVS_CMD_SET_INFO,              /* only used in GET_INFO reply */
 309         IPVS_CMD_GET_INFO,              /* get general IPVS info */
 310
 311         IPVS_CMD_ZERO,                  /* zero all counters and stats */
 312         IPVS_CMD_FLUSH,                 /* flush services and dests */
 313
 314         __IPVS_CMD_MAX,
 315 };
 316
 317 #define IPVS_CMD_MAX (__IPVS_CMD_MAX - 1)
 318
 319 /* Attributes used in the first level of commands */
 320 enum {
 321         IPVS_CMD_ATTR_UNSPEC = 0,
 322         IPVS_CMD_ATTR_SERVICE,          /* nested service attribute */
 323         IPVS_CMD_ATTR_DEST,             /* nested destination attribute */
 324         IPVS_CMD_ATTR_DAEMON,           /* nested sync daemon attribute */
 325         IPVS_CMD_ATTR_TIMEOUT_TCP,      /* TCP connection timeout */
 326         IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,  /* TCP FIN wait timeout */
 327         IPVS_CMD_ATTR_TIMEOUT_UDP,      /* UDP timeout */
 328         __IPVS_CMD_ATTR_MAX,
 329 };
 330
 331 #define IPVS_CMD_ATTR_MAX (__IPVS_SVC_ATTR_MAX - 1)
 332
 333 /*
 334  * Attributes used to describe a service
 335  *
 336  * Used inside nested attribute IPVS_CMD_ATTR_SERVICE
 337  */
 338 enum {
 339         IPVS_SVC_ATTR_UNSPEC = 0,
 340         IPVS_SVC_ATTR_AF,               /* address family */
 341         IPVS_SVC_ATTR_PROTOCOL,         /* virtual service protocol */
 342         IPVS_SVC_ATTR_ADDR,             /* virtual service address */
 343         IPVS_SVC_ATTR_PORT,             /* virtual service port */
 344         IPVS_SVC_ATTR_FWMARK,           /* firewall mark of service */
 345
 346         IPVS_SVC_ATTR_SCHED_NAME,       /* name of scheduler */
 347         IPVS_SVC_ATTR_FLAGS,            /* virtual service flags */
 348         IPVS_SVC_ATTR_TIMEOUT,          /* persistent timeout */
 349         IPVS_SVC_ATTR_NETMASK,          /* persistent netmask */
 350
 351         IPVS_SVC_ATTR_STATS,            /* nested attribute for service stats */
 352
 353         IPVS_SVC_ATTR_PE_NAME,          /* name of ct retriever */
 354
 355         __IPVS_SVC_ATTR_MAX,
 356 };
 357
 358 #define IPVS_SVC_ATTR_MAX (__IPVS_SVC_ATTR_MAX - 1)
 359
 360 /*
 361  * Attributes used to describe a destination (real server)
 362  *
 363  * Used inside nested attribute IPVS_CMD_ATTR_DEST
 364  */
 365 enum {
 366         IPVS_DEST_ATTR_UNSPEC = 0,
 367         IPVS_DEST_ATTR_ADDR,            /* real server address */
 368         IPVS_DEST_ATTR_PORT,            /* real server port */
 369
 370         IPVS_DEST_ATTR_FWD_METHOD,      /* forwarding method */
 371         IPVS_DEST_ATTR_WEIGHT,          /* destination weight */
 372
 373         IPVS_DEST_ATTR_U_THRESH,        /* upper threshold */
 374         IPVS_DEST_ATTR_L_THRESH,        /* lower threshold */
 375
 376         IPVS_DEST_ATTR_ACTIVE_CONNS,    /* active connections */
 377         IPVS_DEST_ATTR_INACT_CONNS,     /* inactive connections */
 378         IPVS_DEST_ATTR_PERSIST_CONNS,   /* persistent connections */
 379
 380         IPVS_DEST_ATTR_STATS,           /* nested attribute for dest stats */
 381         __IPVS_DEST_ATTR_MAX,
 382 };
 383
 384 #define IPVS_DEST_ATTR_MAX (__IPVS_DEST_ATTR_MAX - 1)
 385
 386 /*
 387  * Attributes describing a sync daemon
 388  *
 389  * Used inside nested attribute IPVS_CMD_ATTR_DAEMON
 390  */
 391 enum {
 392         IPVS_DAEMON_ATTR_UNSPEC = 0,
 393         IPVS_DAEMON_ATTR_STATE,         /* sync daemon state (master/backup) */
 394         IPVS_DAEMON_ATTR_MCAST_IFN,     /* multicast interface name */
 395         IPVS_DAEMON_ATTR_SYNC_ID,       /* SyncID we belong to */
 396         __IPVS_DAEMON_ATTR_MAX,
 397 };
 398
 399 #define IPVS_DAEMON_ATTR_MAX (__IPVS_DAEMON_ATTR_MAX - 1)
 400
 401 /*
 402  * Attributes used to describe service or destination entry statistics
 403  *
 404  * Used inside nested attributes IPVS_SVC_ATTR_STATS and IPVS_DEST_ATTR_STATS
 405  */
 406 enum {
 407         IPVS_STATS_ATTR_UNSPEC = 0,
 408         IPVS_STATS_ATTR_CONNS,          /* connections scheduled */
 409         IPVS_STATS_ATTR_INPKTS,         /* incoming packets */
 410         IPVS_STATS_ATTR_OUTPKTS,        /* outgoing packets */
 411         IPVS_STATS_ATTR_INBYTES,        /* incoming bytes */
 412         IPVS_STATS_ATTR_OUTBYTES,       /* outgoing bytes */
 413
 414         IPVS_STATS_ATTR_CPS,            /* current connection rate */
 415         IPVS_STATS_ATTR_INPPS,          /* current in packet rate */
 416         IPVS_STATS_ATTR_OUTPPS,         /* current out packet rate */
 417         IPVS_STATS_ATTR_INBPS,          /* current in byte rate */
 418         IPVS_STATS_ATTR_OUTBPS,         /* current out byte rate */
 419         __IPVS_STATS_ATTR_MAX,
 420 };
 421
 422 #define IPVS_STATS_ATTR_MAX (__IPVS_STATS_ATTR_MAX - 1)
 423
 424 /* Attributes used in response to IPVS_CMD_GET_INFO command */
 425 enum {
 426         IPVS_INFO_ATTR_UNSPEC = 0,
 427         IPVS_INFO_ATTR_VERSION,         /* IPVS version number */
 428         IPVS_INFO_ATTR_CONN_TAB_SIZE,   /* size of connection hash table */
 429         __IPVS_INFO_ATTR_MAX,
 430 };
 431
 432 #define IPVS_INFO_ATTR_MAX (__IPVS_INFO_ATTR_MAX - 1)
 433
 434 #endif  /* _IP_VS_H */