include/uapi/linux/ip_vs.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  *      IP Virtual Server
   4  *      data structure and functionality definitions
   5  */
   6
   7 #ifndef _IP_VS_H
   8 #define _IP_VS_H
   9
  10 #include <linux/types.h>        /* For __beXX types in userland */
  11
  12 #define IP_VS_VERSION_CODE      0x010201
  13 #define NVERSION(version)                       \
  14         (version >> 16) & 0xFF,                 \
  15         (version >> 8) & 0xFF,                  \
  16         version & 0xFF
  17
  18 /*
  19  *      Virtual Service Flags
  20  */
  21 #define IP_VS_SVC_F_PERSISTENT  0x0001          /* persistent port */
  22 #define IP_VS_SVC_F_HASHED      0x0002          /* hashed entry */
  23 #define IP_VS_SVC_F_ONEPACKET   0x0004          /* one-packet scheduling */
  24 #define IP_VS_SVC_F_SCHED1      0x0008          /* scheduler flag 1 */
  25 #define IP_VS_SVC_F_SCHED2      0x0010          /* scheduler flag 2 */
  26 #define IP_VS_SVC_F_SCHED3      0x0020          /* scheduler flag 3 */
  27
  28 #define IP_VS_SVC_F_SCHED_SH_FALLBACK   IP_VS_SVC_F_SCHED1 /* SH fallback */
  29 #define IP_VS_SVC_F_SCHED_SH_PORT       IP_VS_SVC_F_SCHED2 /* SH use port */
  30
  31 /*
  32  *      Destination Server Flags
  33  */
  34 #define IP_VS_DEST_F_AVAILABLE  0x0001          /* server is available */
  35 #define IP_VS_DEST_F_OVERLOAD   0x0002          /* server is overloaded */
  36
  37 /*
  38  *      IPVS sync daemon states
  39  */
  40 #define IP_VS_STATE_NONE        0x0000          /* daemon is stopped */
  41 #define IP_VS_STATE_MASTER      0x0001          /* started as master */
  42 #define IP_VS_STATE_BACKUP      0x0002          /* started as backup */
  43
  44 /*
  45  *      IPVS socket options
  46  */
  47 #define IP_VS_BASE_CTL          (64+1024+64)            /* base */
  48
  49 #define IP_VS_SO_SET_NONE       IP_VS_BASE_CTL          /* just peek */
  50 #define IP_VS_SO_SET_INSERT     (IP_VS_BASE_CTL+1)
  51 #define IP_VS_SO_SET_ADD        (IP_VS_BASE_CTL+2)
  52 #define IP_VS_SO_SET_EDIT       (IP_VS_BASE_CTL+3)
  53 #define IP_VS_SO_SET_DEL        (IP_VS_BASE_CTL+4)
  54 #define IP_VS_SO_SET_FLUSH      (IP_VS_BASE_CTL+5)
  55 #define IP_VS_SO_SET_LIST       (IP_VS_BASE_CTL+6)
  56 #define IP_VS_SO_SET_ADDDEST    (IP_VS_BASE_CTL+7)
  57 #define IP_VS_SO_SET_DELDEST    (IP_VS_BASE_CTL+8)
  58 #define IP_VS_SO_SET_EDITDEST   (IP_VS_BASE_CTL+9)
  59 #define IP_VS_SO_SET_TIMEOUT    (IP_VS_BASE_CTL+10)
  60 #define IP_VS_SO_SET_STARTDAEMON (IP_VS_BASE_CTL+11)
  61 #define IP_VS_SO_SET_STOPDAEMON (IP_VS_BASE_CTL+12)
  62 #define IP_VS_SO_SET_RESTORE    (IP_VS_BASE_CTL+13)
  63 #define IP_VS_SO_SET_SAVE       (IP_VS_BASE_CTL+14)
  64 #define IP_VS_SO_SET_ZERO       (IP_VS_BASE_CTL+15)
  65 #define IP_VS_SO_SET_MAX        IP_VS_SO_SET_ZERO
  66
  67 #define IP_VS_SO_GET_VERSION    IP_VS_BASE_CTL
  68 #define IP_VS_SO_GET_INFO       (IP_VS_BASE_CTL+1)
  69 #define IP_VS_SO_GET_SERVICES   (IP_VS_BASE_CTL+2)
  70 #define IP_VS_SO_GET_SERVICE    (IP_VS_BASE_CTL+3)
  71 #define IP_VS_SO_GET_DESTS      (IP_VS_BASE_CTL+4)
  72 #define IP_VS_SO_GET_DEST       (IP_VS_BASE_CTL+5)      /* not used now */
  73 #define IP_VS_SO_GET_TIMEOUT    (IP_VS_BASE_CTL+6)
  74 #define IP_VS_SO_GET_DAEMON     (IP_VS_BASE_CTL+7)
  75 #define IP_VS_SO_GET_MAX        IP_VS_SO_GET_DAEMON
  76
  77
  78 /*
  79  *      IPVS Connection Flags
  80  *      Only flags 0..15 are sent to backup server
  81  */
  82 #define IP_VS_CONN_F_FWD_MASK   0x0007          /* mask for the fwd methods */
  83 #define IP_VS_CONN_F_MASQ       0x0000          /* masquerading/NAT */
  84 #define IP_VS_CONN_F_LOCALNODE  0x0001          /* local node */
  85 #define IP_VS_CONN_F_TUNNEL     0x0002          /* tunneling */
  86 #define IP_VS_CONN_F_DROUTE     0x0003          /* direct routing */
  87 #define IP_VS_CONN_F_BYPASS     0x0004          /* cache bypass */
  88 #define IP_VS_CONN_F_SYNC       0x0020          /* entry created by sync */
  89 #define IP_VS_CONN_F_HASHED     0x0040          /* hashed entry */
  90 #define IP_VS_CONN_F_NOOUTPUT   0x0080          /* no output packets */
  91 #define IP_VS_CONN_F_INACTIVE   0x0100          /* not established */
  92 #define IP_VS_CONN_F_OUT_SEQ    0x0200          /* must do output seq adjust */
  93 #define IP_VS_CONN_F_IN_SEQ     0x0400          /* must do input seq adjust */
  94 #define IP_VS_CONN_F_SEQ_MASK   0x0600          /* in/out sequence mask */
  95 #define IP_VS_CONN_F_NO_CPORT   0x0800          /* no client port set yet */
  96 #define IP_VS_CONN_F_TEMPLATE   0x1000          /* template, not connection */
  97 #define IP_VS_CONN_F_ONE_PACKET 0x2000          /* forward only one packet */
  98
  99 /* Initial bits allowed in backup server */
 100 #define IP_VS_CONN_F_BACKUP_MASK (IP_VS_CONN_F_FWD_MASK | \
 101                                   IP_VS_CONN_F_NOOUTPUT | \
 102                                   IP_VS_CONN_F_INACTIVE | \
 103                                   IP_VS_CONN_F_SEQ_MASK | \
 104                                   IP_VS_CONN_F_NO_CPORT | \
 105                                   IP_VS_CONN_F_TEMPLATE \
 106                                  )
 107
 108 /* Bits allowed to update in backup server */
 109 #define IP_VS_CONN_F_BACKUP_UPD_MASK (IP_VS_CONN_F_INACTIVE | \
 110                                       IP_VS_CONN_F_SEQ_MASK)
 111
 112 /* Flags that are not sent to backup server start from bit 16 */
 113 #define IP_VS_CONN_F_NFCT       (1 << 16)       /* use netfilter conntrack */
 114
 115 /* Connection flags from destination that can be changed by user space */
 116 #define IP_VS_CONN_F_DEST_MASK (IP_VS_CONN_F_FWD_MASK | \
 117                                 IP_VS_CONN_F_ONE_PACKET | \
 118                                 IP_VS_CONN_F_NFCT | \
 119                                 0)
 120
 121 #define IP_VS_SCHEDNAME_MAXLEN  16
 122 #define IP_VS_PENAME_MAXLEN     16
 123 #define IP_VS_IFNAME_MAXLEN     16
 124
 125 #define IP_VS_PEDATA_MAXLEN     255
 126
 127 /* Tunnel types */
 128 enum {
 129         IP_VS_CONN_F_TUNNEL_TYPE_IPIP = 0,      /* IPIP */
 130         IP_VS_CONN_F_TUNNEL_TYPE_GUE,           /* GUE */
 131         IP_VS_CONN_F_TUNNEL_TYPE_GRE,           /* GRE */
 132         IP_VS_CONN_F_TUNNEL_TYPE_MAX,
 133 };
 134
 135 /* Tunnel encapsulation flags */
 136 #define IP_VS_TUNNEL_ENCAP_FLAG_NOCSUM          (0)
 137 #define IP_VS_TUNNEL_ENCAP_FLAG_CSUM            (1 << 0)
 138 #define IP_VS_TUNNEL_ENCAP_FLAG_REMCSUM         (1 << 1)
 139
 140 /*
 141  *      The struct ip_vs_service_user and struct ip_vs_dest_user are
 142  *      used to set IPVS rules through setsockopt.
 143  */
 144 struct ip_vs_service_user {
 145         /* virtual service addresses */
 146         __u16           protocol;
 147         __be32                  addr;           /* virtual ip address */
 148         __be16                  port;
 149         __u32           fwmark;         /* firwall mark of service */
 150
 151         /* virtual service options */
 152         char                    sched_name[IP_VS_SCHEDNAME_MAXLEN];
 153         unsigned int            flags;          /* virtual service flags */
 154         unsigned int            timeout;        /* persistent timeout in sec */
 155         __be32                  netmask;        /* persistent netmask */
 156 };
 157
 158
 159 struct ip_vs_dest_user {
 160         /* destination server address */
 161         __be32                  addr;
 162         __be16                  port;
 163
 164         /* real server options */
 165         unsigned int            conn_flags;     /* connection flags */
 166         int                     weight;         /* destination weight */
 167
 168         /* thresholds for active connections */
 169         __u32           u_threshold;    /* upper threshold */
 170         __u32           l_threshold;    /* lower threshold */
 171 };
 172
 173
 174 /*
 175  *      IPVS statistics object (for user space)
 176  */
 177 struct ip_vs_stats_user {
 178         __u32                   conns;          /* connections scheduled */
 179         __u32                   inpkts;         /* incoming packets */
 180         __u32                   outpkts;        /* outgoing packets */
 181         __u64                   inbytes;        /* incoming bytes */
 182         __u64                   outbytes;       /* outgoing bytes */
 183
 184         __u32                   cps;            /* current connection rate */
 185         __u32                   inpps;          /* current in packet rate */
 186         __u32                   outpps;         /* current out packet rate */
 187         __u32                   inbps;          /* current in byte rate */
 188         __u32                   outbps;         /* current out byte rate */
 189 };
 190
 191
 192 /* The argument to IP_VS_SO_GET_INFO */
 193 struct ip_vs_getinfo {
 194         /* version number */
 195         unsigned int            version;
 196
 197         /* size of connection hash table */
 198         unsigned int            size;
 199
 200         /* number of virtual services */
 201         unsigned int            num_services;
 202 };
 203
 204
 205 /* The argument to IP_VS_SO_GET_SERVICE */
 206 struct ip_vs_service_entry {
 207         /* which service: user fills in these */
 208         __u16           protocol;
 209         __be32                  addr;           /* virtual address */
 210         __be16                  port;
 211         __u32           fwmark;         /* firwall mark of service */
 212
 213         /* service options */
 214         char                    sched_name[IP_VS_SCHEDNAME_MAXLEN];
 215         unsigned int            flags;          /* virtual service flags */
 216         unsigned int            timeout;        /* persistent timeout */
 217         __be32                  netmask;        /* persistent netmask */
 218
 219         /* number of real servers */
 220         unsigned int            num_dests;
 221
 222         /* statistics */
 223         struct ip_vs_stats_user stats;
 224 };
 225
 226
 227 struct ip_vs_dest_entry {
 228         __be32                  addr;           /* destination address */
 229         __be16                  port;
 230         unsigned int            conn_flags;     /* connection flags */
 231         int                     weight;         /* destination weight */
 232
 233         __u32           u_threshold;    /* upper threshold */
 234         __u32           l_threshold;    /* lower threshold */
 235
 236         __u32           activeconns;    /* active connections */
 237         __u32           inactconns;     /* inactive connections */
 238         __u32           persistconns;   /* persistent connections */
 239
 240         /* statistics */
 241         struct ip_vs_stats_user stats;
 242 };
 243
 244
 245 /* The argument to IP_VS_SO_GET_DESTS */
 246 struct ip_vs_get_dests {
 247         /* which service: user fills in these */
 248         __u16           protocol;
 249         __be32                  addr;           /* virtual address */
 250         __be16                  port;
 251         __u32           fwmark;         /* firwall mark of service */
 252
 253         /* number of real servers */
 254         unsigned int            num_dests;
 255
 256         /* the real servers */
 257         struct ip_vs_dest_entry entrytable[];
 258 };
 259
 260
 261 /* The argument to IP_VS_SO_GET_SERVICES */
 262 struct ip_vs_get_services {
 263         /* number of virtual services */
 264         unsigned int            num_services;
 265
 266         /* service table */
 267         struct ip_vs_service_entry entrytable[];
 268 };
 269
 270
 271 /* The argument to IP_VS_SO_GET_TIMEOUT */
 272 struct ip_vs_timeout_user {
 273         int                     tcp_timeout;
 274         int                     tcp_fin_timeout;
 275         int                     udp_timeout;
 276 };
 277
 278
 279 /* The argument to IP_VS_SO_GET_DAEMON */
 280 struct ip_vs_daemon_user {
 281         /* sync daemon state (master/backup) */
 282         int                     state;
 283
 284         /* multicast interface name */
 285         char                    mcast_ifn[IP_VS_IFNAME_MAXLEN];
 286
 287         /* SyncID we belong to */
 288         int                     syncid;
 289 };
 290
 291 /*
 292  *
 293  * IPVS Generic Netlink interface definitions
 294  *
 295  */
 296
 297 /* Generic Netlink family info */
 298
 299 #define IPVS_GENL_NAME          "IPVS"
 300 #define IPVS_GENL_VERSION       0x1
 301
 302 struct ip_vs_flags {
 303         __u32 flags;
 304         __u32 mask;
 305 };
 306
 307 /* Generic Netlink command attributes */
 308 enum {
 309         IPVS_CMD_UNSPEC = 0,
 310
 311         IPVS_CMD_NEW_SERVICE,           /* add service */
 312         IPVS_CMD_SET_SERVICE,           /* modify service */
 313         IPVS_CMD_DEL_SERVICE,           /* delete service */
 314         IPVS_CMD_GET_SERVICE,           /* get service info */
 315
 316         IPVS_CMD_NEW_DEST,              /* add destination */
 317         IPVS_CMD_SET_DEST,              /* modify destination */
 318         IPVS_CMD_DEL_DEST,              /* delete destination */
 319         IPVS_CMD_GET_DEST,              /* get destination info */
 320
 321         IPVS_CMD_NEW_DAEMON,            /* start sync daemon */
 322         IPVS_CMD_DEL_DAEMON,            /* stop sync daemon */
 323         IPVS_CMD_GET_DAEMON,            /* get sync daemon status */
 324
 325         IPVS_CMD_SET_CONFIG,            /* set config settings */
 326         IPVS_CMD_GET_CONFIG,            /* get config settings */
 327
 328         IPVS_CMD_SET_INFO,              /* only used in GET_INFO reply */
 329         IPVS_CMD_GET_INFO,              /* get general IPVS info */
 330
 331         IPVS_CMD_ZERO,                  /* zero all counters and stats */
 332         IPVS_CMD_FLUSH,                 /* flush services and dests */
 333
 334         __IPVS_CMD_MAX,
 335 };
 336
 337 #define IPVS_CMD_MAX (__IPVS_CMD_MAX - 1)
 338
 339 /* Attributes used in the first level of commands */
 340 enum {
 341         IPVS_CMD_ATTR_UNSPEC = 0,
 342         IPVS_CMD_ATTR_SERVICE,          /* nested service attribute */
 343         IPVS_CMD_ATTR_DEST,             /* nested destination attribute */
 344         IPVS_CMD_ATTR_DAEMON,           /* nested sync daemon attribute */
 345         IPVS_CMD_ATTR_TIMEOUT_TCP,      /* TCP connection timeout */
 346         IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,  /* TCP FIN wait timeout */
 347         IPVS_CMD_ATTR_TIMEOUT_UDP,      /* UDP timeout */
 348         __IPVS_CMD_ATTR_MAX,
 349 };
 350
 351 #define IPVS_CMD_ATTR_MAX (__IPVS_CMD_ATTR_MAX - 1)
 352
 353 /*
 354  * Attributes used to describe a service
 355  *
 356  * Used inside nested attribute IPVS_CMD_ATTR_SERVICE
 357  */
 358 enum {
 359         IPVS_SVC_ATTR_UNSPEC = 0,
 360         IPVS_SVC_ATTR_AF,               /* address family */
 361         IPVS_SVC_ATTR_PROTOCOL,         /* virtual service protocol */
 362         IPVS_SVC_ATTR_ADDR,             /* virtual service address */
 363         IPVS_SVC_ATTR_PORT,             /* virtual service port */
 364         IPVS_SVC_ATTR_FWMARK,           /* firewall mark of service */
 365
 366         IPVS_SVC_ATTR_SCHED_NAME,       /* name of scheduler */
 367         IPVS_SVC_ATTR_FLAGS,            /* virtual service flags */
 368         IPVS_SVC_ATTR_TIMEOUT,          /* persistent timeout */
 369         IPVS_SVC_ATTR_NETMASK,          /* persistent netmask */
 370
 371         IPVS_SVC_ATTR_STATS,            /* nested attribute for service stats */
 372
 373         IPVS_SVC_ATTR_PE_NAME,          /* name of ct retriever */
 374
 375         IPVS_SVC_ATTR_STATS64,          /* nested attribute for service stats */
 376
 377         __IPVS_SVC_ATTR_MAX,
 378 };
 379
 380 #define IPVS_SVC_ATTR_MAX (__IPVS_SVC_ATTR_MAX - 1)
 381
 382 /*
 383  * Attributes used to describe a destination (real server)
 384  *
 385  * Used inside nested attribute IPVS_CMD_ATTR_DEST
 386  */
 387 enum {
 388         IPVS_DEST_ATTR_UNSPEC = 0,
 389         IPVS_DEST_ATTR_ADDR,            /* real server address */
 390         IPVS_DEST_ATTR_PORT,            /* real server port */
 391
 392         IPVS_DEST_ATTR_FWD_METHOD,      /* forwarding method */
 393         IPVS_DEST_ATTR_WEIGHT,          /* destination weight */
 394
 395         IPVS_DEST_ATTR_U_THRESH,        /* upper threshold */
 396         IPVS_DEST_ATTR_L_THRESH,        /* lower threshold */
 397
 398         IPVS_DEST_ATTR_ACTIVE_CONNS,    /* active connections */
 399         IPVS_DEST_ATTR_INACT_CONNS,     /* inactive connections */
 400         IPVS_DEST_ATTR_PERSIST_CONNS,   /* persistent connections */
 401
 402         IPVS_DEST_ATTR_STATS,           /* nested attribute for dest stats */
 403
 404         IPVS_DEST_ATTR_ADDR_FAMILY,     /* Address family of address */
 405
 406         IPVS_DEST_ATTR_STATS64,         /* nested attribute for dest stats */
 407
 408         IPVS_DEST_ATTR_TUN_TYPE,        /* tunnel type */
 409
 410         IPVS_DEST_ATTR_TUN_PORT,        /* tunnel port */
 411
 412         IPVS_DEST_ATTR_TUN_FLAGS,       /* tunnel flags */
 413
 414         __IPVS_DEST_ATTR_MAX,
 415 };
 416
 417 #define IPVS_DEST_ATTR_MAX (__IPVS_DEST_ATTR_MAX - 1)
 418
 419 /*
 420  * Attributes describing a sync daemon
 421  *
 422  * Used inside nested attribute IPVS_CMD_ATTR_DAEMON
 423  */
 424 enum {
 425         IPVS_DAEMON_ATTR_UNSPEC = 0,
 426         IPVS_DAEMON_ATTR_STATE,         /* sync daemon state (master/backup) */
 427         IPVS_DAEMON_ATTR_MCAST_IFN,     /* multicast interface name */
 428         IPVS_DAEMON_ATTR_SYNC_ID,       /* SyncID we belong to */
 429         IPVS_DAEMON_ATTR_SYNC_MAXLEN,   /* UDP Payload Size */
 430         IPVS_DAEMON_ATTR_MCAST_GROUP,   /* IPv4 Multicast Address */
 431         IPVS_DAEMON_ATTR_MCAST_GROUP6,  /* IPv6 Multicast Address */
 432         IPVS_DAEMON_ATTR_MCAST_PORT,    /* Multicast Port (base) */
 433         IPVS_DAEMON_ATTR_MCAST_TTL,     /* Multicast TTL */
 434         __IPVS_DAEMON_ATTR_MAX,
 435 };
 436
 437 #define IPVS_DAEMON_ATTR_MAX (__IPVS_DAEMON_ATTR_MAX - 1)
 438
 439 /*
 440  * Attributes used to describe service or destination entry statistics
 441  *
 442  * Used inside nested attributes IPVS_SVC_ATTR_STATS, IPVS_DEST_ATTR_STATS,
 443  * IPVS_SVC_ATTR_STATS64 and IPVS_DEST_ATTR_STATS64.
 444  */
 445 enum {
 446         IPVS_STATS_ATTR_UNSPEC = 0,
 447         IPVS_STATS_ATTR_CONNS,          /* connections scheduled */
 448         IPVS_STATS_ATTR_INPKTS,         /* incoming packets */
 449         IPVS_STATS_ATTR_OUTPKTS,        /* outgoing packets */
 450         IPVS_STATS_ATTR_INBYTES,        /* incoming bytes */
 451         IPVS_STATS_ATTR_OUTBYTES,       /* outgoing bytes */
 452
 453         IPVS_STATS_ATTR_CPS,            /* current connection rate */
 454         IPVS_STATS_ATTR_INPPS,          /* current in packet rate */
 455         IPVS_STATS_ATTR_OUTPPS,         /* current out packet rate */
 456         IPVS_STATS_ATTR_INBPS,          /* current in byte rate */
 457         IPVS_STATS_ATTR_OUTBPS,         /* current out byte rate */
 458         IPVS_STATS_ATTR_PAD,
 459         __IPVS_STATS_ATTR_MAX,
 460 };
 461
 462 #define IPVS_STATS_ATTR_MAX (__IPVS_STATS_ATTR_MAX - 1)
 463
 464 /* Attributes used in response to IPVS_CMD_GET_INFO command */
 465 enum {
 466         IPVS_INFO_ATTR_UNSPEC = 0,
 467         IPVS_INFO_ATTR_VERSION,         /* IPVS version number */
 468         IPVS_INFO_ATTR_CONN_TAB_SIZE,   /* size of connection hash table */
 469         __IPVS_INFO_ATTR_MAX,
 470 };
 471
 472 #define IPVS_INFO_ATTR_MAX (__IPVS_INFO_ATTR_MAX - 1)
 473
 474 #endif  /* _IP_VS_H */