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ip_vs.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * IP Virtual Server * data structure and functionality definitions */ #ifndef _IP_VS_H #define _IP_VS_H #include <linux/types.h> /* For __beXX types in userland */ #define IP_VS_VERSION_CODE 0x010201 #define NVERSION(version) \ (version >> 16) & 0xFF, \ (version >> 8) & 0xFF, \ version & 0xFF /* * Virtual Service Flags */ #define IP_VS_SVC_F_PERSISTENT 0x0001 /* persistent port */ #define IP_VS_SVC_F_HASHED 0x0002 /* hashed entry */ #define IP_VS_SVC_F_ONEPACKET 0x0004 /* one-packet scheduling */ #define IP_VS_SVC_F_SCHED1 0x0008 /* scheduler flag 1 */ #define IP_VS_SVC_F_SCHED2 0x0010 /* scheduler flag 2 */ #define IP_VS_SVC_F_SCHED3 0x0020 /* scheduler flag 3 */ #define IP_VS_SVC_F_SCHED_SH_FALLBACK IP_VS_SVC_F_SCHED1 /* SH fallback */ #define IP_VS_SVC_F_SCHED_SH_PORT IP_VS_SVC_F_SCHED2 /* SH use port */ /* * Destination Server Flags */ #define IP_VS_DEST_F_AVAILABLE 0x0001 /* server is available */ #define IP_VS_DEST_F_OVERLOAD 0x0002 /* server is overloaded */ /* * IPVS sync daemon states */ #define IP_VS_STATE_NONE 0x0000 /* daemon is stopped */ #define IP_VS_STATE_MASTER 0x0001 /* started as master */ #define IP_VS_STATE_BACKUP 0x0002 /* started as backup */ /* * IPVS socket options */ #define IP_VS_BASE_CTL (64+1024+64) /* base */ #define IP_VS_SO_SET_NONE IP_VS_BASE_CTL /* just peek */ #define IP_VS_SO_SET_INSERT (IP_VS_BASE_CTL+1) #define IP_VS_SO_SET_ADD (IP_VS_BASE_CTL+2) #define IP_VS_SO_SET_EDIT (IP_VS_BASE_CTL+3) #define IP_VS_SO_SET_DEL (IP_VS_BASE_CTL+4) #define IP_VS_SO_SET_FLUSH (IP_VS_BASE_CTL+5) #define IP_VS_SO_SET_LIST (IP_VS_BASE_CTL+6) #define IP_VS_SO_SET_ADDDEST (IP_VS_BASE_CTL+7) #define IP_VS_SO_SET_DELDEST (IP_VS_BASE_CTL+8) #define IP_VS_SO_SET_EDITDEST (IP_VS_BASE_CTL+9) #define IP_VS_SO_SET_TIMEOUT (IP_VS_BASE_CTL+10) #define IP_VS_SO_SET_STARTDAEMON (IP_VS_BASE_CTL+11) #define IP_VS_SO_SET_STOPDAEMON (IP_VS_BASE_CTL+12) #define IP_VS_SO_SET_RESTORE (IP_VS_BASE_CTL+13) #define IP_VS_SO_SET_SAVE (IP_VS_BASE_CTL+14) #define IP_VS_SO_SET_ZERO (IP_VS_BASE_CTL+15) #define IP_VS_SO_SET_MAX IP_VS_SO_SET_ZERO #define IP_VS_SO_GET_VERSION IP_VS_BASE_CTL #define IP_VS_SO_GET_INFO (IP_VS_BASE_CTL+1) #define IP_VS_SO_GET_SERVICES (IP_VS_BASE_CTL+2) #define IP_VS_SO_GET_SERVICE (IP_VS_BASE_CTL+3) #define IP_VS_SO_GET_DESTS (IP_VS_BASE_CTL+4) #define IP_VS_SO_GET_DEST (IP_VS_BASE_CTL+5) /* not used now */ #define IP_VS_SO_GET_TIMEOUT (IP_VS_BASE_CTL+6) #define IP_VS_SO_GET_DAEMON (IP_VS_BASE_CTL+7) #define IP_VS_SO_GET_MAX IP_VS_SO_GET_DAEMON /* * IPVS Connection Flags * Only flags 0..15 are sent to backup server */ #define IP_VS_CONN_F_FWD_MASK 0x0007 /* mask for the fwd methods */ #define IP_VS_CONN_F_MASQ 0x0000 /* masquerading/NAT */ #define IP_VS_CONN_F_LOCALNODE 0x0001 /* local node */ #define IP_VS_CONN_F_TUNNEL 0x0002 /* tunneling */ #define IP_VS_CONN_F_DROUTE 0x0003 /* direct routing */ #define IP_VS_CONN_F_BYPASS 0x0004 /* cache bypass */ #define IP_VS_CONN_F_SYNC 0x0020 /* entry created by sync */ #define IP_VS_CONN_F_HASHED 0x0040 /* hashed entry */ #define IP_VS_CONN_F_NOOUTPUT 0x0080 /* no output packets */ #define IP_VS_CONN_F_INACTIVE 0x0100 /* not established */ #define IP_VS_CONN_F_OUT_SEQ 0x0200 /* must do output seq adjust */ #define IP_VS_CONN_F_IN_SEQ 0x0400 /* must do input seq adjust */ #define IP_VS_CONN_F_SEQ_MASK 0x0600 /* in/out sequence mask */ #define IP_VS_CONN_F_NO_CPORT 0x0800 /* no client port set yet */ #define IP_VS_CONN_F_TEMPLATE 0x1000 /* template, not connection */ #define IP_VS_CONN_F_ONE_PACKET 0x2000 /* forward only one packet */ /* Initial bits allowed in backup server */ #define IP_VS_CONN_F_BACKUP_MASK (IP_VS_CONN_F_FWD_MASK | \ IP_VS_CONN_F_NOOUTPUT | \ IP_VS_CONN_F_INACTIVE | \ IP_VS_CONN_F_SEQ_MASK | \ IP_VS_CONN_F_NO_CPORT | \ IP_VS_CONN_F_TEMPLATE \ ) /* Bits allowed to update in backup server */ #define IP_VS_CONN_F_BACKUP_UPD_MASK (IP_VS_CONN_F_INACTIVE | \ IP_VS_CONN_F_SEQ_MASK) /* Flags that are not sent to backup server start from bit 16 */ #define IP_VS_CONN_F_NFCT (1 << 16) /* use netfilter conntrack */ /* Connection flags from destination that can be changed by user space */ #define IP_VS_CONN_F_DEST_MASK (IP_VS_CONN_F_FWD_MASK | \ IP_VS_CONN_F_ONE_PACKET | \ IP_VS_CONN_F_NFCT | \ 0) #define IP_VS_SCHEDNAME_MAXLEN 16 #define IP_VS_PENAME_MAXLEN 16 #define IP_VS_IFNAME_MAXLEN 16 #define IP_VS_PEDATA_MAXLEN 255 /* * The struct ip_vs_service_user and struct ip_vs_dest_user are * used to set IPVS rules through setsockopt. */ struct ip_vs_service_user { /* virtual service addresses */ __u16 protocol; __be32 addr; /* virtual ip address */ __be16 port; __u32 fwmark; /* firwall mark of service */ /* virtual service options */ char sched_name[IP_VS_SCHEDNAME_MAXLEN]; unsigned int flags; /* virtual service flags */ unsigned int timeout; /* persistent timeout in sec */ __be32 netmask; /* persistent netmask */ }; struct ip_vs_dest_user { /* destination server address */ __be32 addr; __be16 port; /* real server options */ unsigned int conn_flags; /* connection flags */ int weight; /* destination weight */ /* thresholds for active connections */ __u32 u_threshold; /* upper threshold */ __u32 l_threshold; /* lower threshold */ }; /* * IPVS statistics object (for user space) */ struct ip_vs_stats_user { __u32 conns; /* connections scheduled */ __u32 inpkts; /* incoming packets */ __u32 outpkts; /* outgoing packets */ __u64 inbytes; /* incoming bytes */ __u64 outbytes; /* outgoing bytes */ __u32 cps; /* current connection rate */ __u32 inpps; /* current in packet rate */ __u32 outpps; /* current out packet rate */ __u32 inbps; /* current in byte rate */ __u32 outbps; /* current out byte rate */ }; /* The argument to IP_VS_SO_GET_INFO */ struct ip_vs_getinfo { /* version number */ unsigned int version; /* size of connection hash table */ unsigned int size; /* number of virtual services */ unsigned int num_services; }; /* The argument to IP_VS_SO_GET_SERVICE */ struct ip_vs_service_entry { /* which service: user fills in these */ __u16 protocol; __be32 addr; /* virtual address */ __be16 port; __u32 fwmark; /* firwall mark of service */ /* service options */ char sched_name[IP_VS_SCHEDNAME_MAXLEN]; unsigned int flags; /* virtual service flags */ unsigned int timeout; /* persistent timeout */ __be32 netmask; /* persistent netmask */ /* number of real servers */ unsigned int num_dests; /* statistics */ struct ip_vs_stats_user stats; }; struct ip_vs_dest_entry { __be32 addr; /* destination address */ __be16 port; unsigned int conn_flags; /* connection flags */ int weight; /* destination weight */ __u32 u_threshold; /* upper threshold */ __u32 l_threshold; /* lower threshold */ __u32 activeconns; /* active connections */ __u32 inactconns; /* inactive connections */ __u32 persistconns; /* persistent connections */ /* statistics */ struct ip_vs_stats_user stats; }; /* The argument to IP_VS_SO_GET_DESTS */ struct ip_vs_get_dests { /* which service: user fills in these */ __u16 protocol; __be32 addr; /* virtual address */ __be16 port; __u32 fwmark; /* firwall mark of service */ /* number of real servers */ unsigned int num_dests; /* the real servers */ struct ip_vs_dest_entry entrytable[0]; }; /* The argument to IP_VS_SO_GET_SERVICES */ struct ip_vs_get_services { /* number of virtual services */ unsigned int num_services; /* service table */ struct ip_vs_service_entry entrytable[0]; }; /* The argument to IP_VS_SO_GET_TIMEOUT */ struct ip_vs_timeout_user { int tcp_timeout; int tcp_fin_timeout; int udp_timeout; }; /* The argument to IP_VS_SO_GET_DAEMON */ struct ip_vs_daemon_user { /* sync daemon state (master/backup) */ int state; /* multicast interface name */ char mcast_ifn[IP_VS_IFNAME_MAXLEN]; /* SyncID we belong to */ int syncid; }; /* * * IPVS Generic Netlink interface definitions * */ /* Generic Netlink family info */ #define IPVS_GENL_NAME "IPVS" #define IPVS_GENL_VERSION 0x1 struct ip_vs_flags { __u32 flags; __u32 mask; }; /* Generic Netlink command attributes */ enum { IPVS_CMD_UNSPEC = 0, IPVS_CMD_NEW_SERVICE, /* add service */ IPVS_CMD_SET_SERVICE, /* modify service */ IPVS_CMD_DEL_SERVICE, /* delete service */ IPVS_CMD_GET_SERVICE, /* get service info */ IPVS_CMD_NEW_DEST, /* add destination */ IPVS_CMD_SET_DEST, /* modify destination */ IPVS_CMD_DEL_DEST, /* delete destination */ IPVS_CMD_GET_DEST, /* get destination info */ IPVS_CMD_NEW_DAEMON, /* start sync daemon */ IPVS_CMD_DEL_DAEMON, /* stop sync daemon */ IPVS_CMD_GET_DAEMON, /* get sync daemon status */ IPVS_CMD_SET_CONFIG, /* set config settings */ IPVS_CMD_GET_CONFIG, /* get config settings */ IPVS_CMD_SET_INFO, /* only used in GET_INFO reply */ IPVS_CMD_GET_INFO, /* get general IPVS info */ IPVS_CMD_ZERO, /* zero all counters and stats */ IPVS_CMD_FLUSH, /* flush services and dests */ __IPVS_CMD_MAX, }; #define IPVS_CMD_MAX (__IPVS_CMD_MAX - 1) /* Attributes used in the first level of commands */ enum { IPVS_CMD_ATTR_UNSPEC = 0, IPVS_CMD_ATTR_SERVICE, /* nested service attribute */ IPVS_CMD_ATTR_DEST, /* nested destination attribute */ IPVS_CMD_ATTR_DAEMON, /* nested sync daemon attribute */ IPVS_CMD_ATTR_TIMEOUT_TCP, /* TCP connection timeout */ IPVS_CMD_ATTR_TIMEOUT_TCP_FIN, /* TCP FIN wait timeout */ IPVS_CMD_ATTR_TIMEOUT_UDP, /* UDP timeout */ __IPVS_CMD_ATTR_MAX, }; #define IPVS_CMD_ATTR_MAX (__IPVS_CMD_ATTR_MAX - 1) /* * Attributes used to describe a service * * Used inside nested attribute IPVS_CMD_ATTR_SERVICE */ enum { IPVS_SVC_ATTR_UNSPEC = 0, IPVS_SVC_ATTR_AF, /* address family */ IPVS_SVC_ATTR_PROTOCOL, /* virtual service protocol */ IPVS_SVC_ATTR_ADDR, /* virtual service address */ IPVS_SVC_ATTR_PORT, /* virtual service port */ IPVS_SVC_ATTR_FWMARK, /* firewall mark of service */ IPVS_SVC_ATTR_SCHED_NAME, /* name of scheduler */ IPVS_SVC_ATTR_FLAGS, /* virtual service flags */ IPVS_SVC_ATTR_TIMEOUT, /* persistent timeout */ IPVS_SVC_ATTR_NETMASK, /* persistent netmask */ IPVS_SVC_ATTR_STATS, /* nested attribute for service stats */ IPVS_SVC_ATTR_PE_NAME, /* name of ct retriever */ IPVS_SVC_ATTR_STATS64, /* nested attribute for service stats */ __IPVS_SVC_ATTR_MAX, }; #define IPVS_SVC_ATTR_MAX (__IPVS_SVC_ATTR_MAX - 1) /* * Attributes used to describe a destination (real server) * * Used inside nested attribute IPVS_CMD_ATTR_DEST */ enum { IPVS_DEST_ATTR_UNSPEC = 0, IPVS_DEST_ATTR_ADDR, /* real server address */ IPVS_DEST_ATTR_PORT, /* real server port */ IPVS_DEST_ATTR_FWD_METHOD, /* forwarding method */ IPVS_DEST_ATTR_WEIGHT, /* destination weight */ IPVS_DEST_ATTR_U_THRESH, /* upper threshold */ IPVS_DEST_ATTR_L_THRESH, /* lower threshold */ IPVS_DEST_ATTR_ACTIVE_CONNS, /* active connections */ IPVS_DEST_ATTR_INACT_CONNS, /* inactive connections */ IPVS_DEST_ATTR_PERSIST_CONNS, /* persistent connections */ IPVS_DEST_ATTR_STATS, /* nested attribute for dest stats */ IPVS_DEST_ATTR_ADDR_FAMILY, /* Address family of address */ IPVS_DEST_ATTR_STATS64, /* nested attribute for dest stats */ __IPVS_DEST_ATTR_MAX, }; #define IPVS_DEST_ATTR_MAX (__IPVS_DEST_ATTR_MAX - 1) /* * Attributes describing a sync daemon * * Used inside nested attribute IPVS_CMD_ATTR_DAEMON */ enum { IPVS_DAEMON_ATTR_UNSPEC = 0, IPVS_DAEMON_ATTR_STATE, /* sync daemon state (master/backup) */ IPVS_DAEMON_ATTR_MCAST_IFN, /* multicast interface name */ IPVS_DAEMON_ATTR_SYNC_ID, /* SyncID we belong to */ IPVS_DAEMON_ATTR_SYNC_MAXLEN, /* UDP Payload Size */ IPVS_DAEMON_ATTR_MCAST_GROUP, /* IPv4 Multicast Address */ IPVS_DAEMON_ATTR_MCAST_GROUP6, /* IPv6 Multicast Address */ IPVS_DAEMON_ATTR_MCAST_PORT, /* Multicast Port (base) */ IPVS_DAEMON_ATTR_MCAST_TTL, /* Multicast TTL */ __IPVS_DAEMON_ATTR_MAX, }; #define IPVS_DAEMON_ATTR_MAX (__IPVS_DAEMON_ATTR_MAX - 1) /* * Attributes used to describe service or destination entry statistics * * Used inside nested attributes IPVS_SVC_ATTR_STATS, IPVS_DEST_ATTR_STATS, * IPVS_SVC_ATTR_STATS64 and IPVS_DEST_ATTR_STATS64. */ enum { IPVS_STATS_ATTR_UNSPEC = 0, IPVS_STATS_ATTR_CONNS, /* connections scheduled */ IPVS_STATS_ATTR_INPKTS, /* incoming packets */ IPVS_STATS_ATTR_OUTPKTS, /* outgoing packets */ IPVS_STATS_ATTR_INBYTES, /* incoming bytes */ IPVS_STATS_ATTR_OUTBYTES, /* outgoing bytes */ IPVS_STATS_ATTR_CPS, /* current connection rate */ IPVS_STATS_ATTR_INPPS, /* current in packet rate */ IPVS_STATS_ATTR_OUTPPS, /* current out packet rate */ IPVS_STATS_ATTR_INBPS, /* current in byte rate */ IPVS_STATS_ATTR_OUTBPS, /* current out byte rate */ IPVS_STATS_ATTR_PAD, __IPVS_STATS_ATTR_MAX, }; #define IPVS_STATS_ATTR_MAX (__IPVS_STATS_ATTR_MAX - 1) /* Attributes used in response to IPVS_CMD_GET_INFO command */ enum { IPVS_INFO_ATTR_UNSPEC = 0, IPVS_INFO_ATTR_VERSION, /* IPVS version number */ IPVS_INFO_ATTR_CONN_TAB_SIZE, /* size of connection hash table */ __IPVS_INFO_ATTR_MAX, }; #define IPVS_INFO_ATTR_MAX (__IPVS_INFO_ATTR_MAX - 1) #endif /* _IP_VS_H */