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linux-hardened/include/linux/ip_vs.h
Nick Chalk 26ec037f98 IPVS: one-packet scheduling 
Allow one-packet scheduling for UDP connections. When the fwmark-based or
normal virtual service is marked with '-o' or '--ops' options all
connections are created only to schedule one packet. Useful to schedule UDP
packets from same client port to different real servers. Recommended with
RR or WRR schedulers (the connections are not visible with ipvsadm -L).

Signed-off-by: Nick Chalk <nick@loadbalancer.org>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-06-22 08:07:01 +02:00

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/*
* 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 */
/*
* 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
*/
#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 */
#define IP_VS_SCHEDNAME_MAXLEN 16
#define IP_VS_IFNAME_MAXLEN 16
/*
* 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 flags; /* virtual service flags */
unsigned 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 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 flags; /* virtual service flags */
unsigned 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 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 {
__be32 flags;
__be32 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_SVC_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_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_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_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 and IPVS_DEST_ATTR_STATS
*/
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_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 */
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