/* * sysctl.h: General linux system control interface * * Begun 24 March 1995, Stephen Tweedie * **************************************************************** **************************************************************** ** **  WARNING:   **  The values in this file are exported to user space via  **  the sysctl() binary interface.  Do *NOT* change the  **  numbering of any existing values here, and do not change **  any numbers within any one set of values.  If you have **  to redefine an existing interface, use a new number for it. **  The kernel will then return ENOTDIR to any application using **  the old binary interface. ** **  --sct ** **************************************************************** **************************************************************** */#ifndef _LINUX_SYSCTL_H#define _LINUX_SYSCTL_H#include <linux/kernel.h>#include <linux/types.h>#include <linux/list.h>struct file;#define CTL_MAXNAME 10struct __sysctl_args {	int *name;	int nlen;	void *oldval;	size_t *oldlenp;	void *newval;	size_t newlen;	unsigned long __unused[4];};/* Define sysctl names first *//* Top-level names: *//* For internal pattern-matching use only: */#ifdef __KERNEL__#define CTL_ANY		-1	/* Matches any name */#define CTL_NONE	0#endifenum{	CTL_KERN=1,		/* General kernel info and control */	CTL_VM=2,		/* VM management */	CTL_NET=3,		/* Networking */	CTL_PROC=4,		/* Process info */	CTL_FS=5,		/* Filesystems */	CTL_DEBUG=6,		/* Debugging */	CTL_DEV=7,		/* Devices */	CTL_BUS=8,		/* Busses */	CTL_ABI=9,		/* Binary emulation */	CTL_CPU=10		/* CPU stuff (speed scaling, etc) */};/* CTL_BUS names: */enum{	BUS_ISA=1		/* ISA */};/* CTL_KERN names: */enum{	KERN_OSTYPE=1,		/* string: system version */	KERN_OSRELEASE=2,	/* string: system release */	KERN_OSREV=3,		/* int: system revision */	KERN_VERSION=4,		/* string: compile time info */	KERN_SECUREMASK=5,	/* struct: maximum rights mask */	KERN_PROF=6,		/* table: profiling information */	KERN_NODENAME=7,	KERN_DOMAINNAME=8,	KERN_CAP_BSET=14,	/* int: capability bounding set */	KERN_PANIC=15,		/* int: panic timeout */	KERN_REALROOTDEV=16,	/* real root device to mount after initrd */	KERN_SPARC_REBOOT=21,	/* reboot command on Sparc */	KERN_CTLALTDEL=22,	/* int: allow ctl-alt-del to reboot */	KERN_PRINTK=23,		/* struct: control printk logging parameters */	KERN_NAMETRANS=24,	/* Name translation */	KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */	KERN_PPC_ZEROPAGED=26,	/* turn idle page zeroing on/off on PPC */	KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */	KERN_MODPROBE=28,	KERN_SG_BIG_BUFF=29,	KERN_ACCT=30,		/* BSD process accounting parameters */	KERN_PPC_L2CR=31,	/* l2cr register on PPC */	KERN_RTSIGNR=32,	/* Number of rt sigs queued */	KERN_RTSIGMAX=33,	/* Max queuable */		KERN_SHMMAX=34,         /* long: Maximum shared memory segment */	KERN_MSGMAX=35,         /* int: Maximum size of a messege */	KERN_MSGMNB=36,         /* int: Maximum message queue size */	KERN_MSGPOOL=37,        /* int: Maximum system message pool size */	KERN_SYSRQ=38,		/* int: Sysreq enable */	KERN_MAX_THREADS=39,	/* int: Maximum nr of threads in the system */ 	KERN_RANDOM=40,		/* Random driver */ 	KERN_SHMALL=41,		/* int: Maximum size of shared memory */ 	KERN_MSGMNI=42,		/* int: msg queue identifiers */ 	KERN_SEM=43,		/* struct: sysv semaphore limits */ 	KERN_SPARC_STOP_A=44,	/* int: Sparc Stop-A enable */ 	KERN_SHMMNI=45,		/* int: shm array identifiers */	KERN_OVERFLOWUID=46,	/* int: overflow UID */	KERN_OVERFLOWGID=47,	/* int: overflow GID */	KERN_SHMPATH=48,	/* string: path to shm fs */	KERN_HOTPLUG=49,	/* string: path to hotplug policy agent */	KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */	KERN_S390_USER_DEBUG_LOGGING=51,  /* int: dumps of user faults */	KERN_CORE_USES_PID=52,		/* int: use core or core.%pid */	KERN_TAINTED=53,	/* int: various kernel tainted flags */	KERN_CADPID=54,		/* int: PID of the process to notify on CAD */        KERN_FAIRSCHED=49,	   /* turn fair scheduler on/off */};/* CTL_VM names: */enum{	VM_SWAPCTL=1,		/* struct: Set vm swapping control */	VM_SWAPOUT=2,		/* int: Linear or sqrt() swapout for hogs */	VM_FREEPG=3,		/* struct: Set free page thresholds */	VM_BDFLUSH=4,		/* struct: Control buffer cache flushing */	VM_OVERCOMMIT_MEMORY=5,	/* Turn off the virtual memory safety limit */	VM_BUFFERMEM=6,		/* struct: Set buffer memory thresholds */	VM_PAGECACHE=7,		/* struct: Set cache memory thresholds */	VM_PAGERDAEMON=8,	/* struct: Control kswapd behaviour */	VM_PGT_CACHE=9,		/* struct: Set page table cache parameters */	VM_PAGE_CLUSTER=10,	/* int: set number of pages to swap together */       VM_MIN_READAHEAD=12,    /* Min file readahead */       VM_MAX_READAHEAD=13     /* Max file readahead */};/* CTL_NET names: */enum{	NET_CORE=1,	NET_ETHER=2,	NET_802=3,	NET_UNIX=4,	NET_IPV4=5,	NET_IPX=6,	NET_ATALK=7,	NET_NETROM=8,	NET_AX25=9,	NET_BRIDGE=10,	NET_ROSE=11,	NET_IPV6=12,	NET_X25=13,	NET_TR=14,	NET_DECNET=15,	NET_ECONET=16,	NET_KHTTPD=17};/* /proc/sys/kernel/random */enum{	RANDOM_POOLSIZE=1,	RANDOM_ENTROPY_COUNT=2,	RANDOM_READ_THRESH=3,	RANDOM_WRITE_THRESH=4,	RANDOM_BOOT_ID=5,	RANDOM_UUID=6};/* /proc/sys/bus/isa */enum{	BUS_ISA_MEM_BASE=1,	BUS_ISA_PORT_BASE=2,	BUS_ISA_PORT_SHIFT=3};/* /proc/sys/net/core */enum{	NET_CORE_WMEM_MAX=1,	NET_CORE_RMEM_MAX=2,	NET_CORE_WMEM_DEFAULT=3,	NET_CORE_RMEM_DEFAULT=4,/* was	NET_CORE_DESTROY_DELAY */	NET_CORE_MAX_BACKLOG=6,	NET_CORE_FASTROUTE=7,	NET_CORE_MSG_COST=8,	NET_CORE_MSG_BURST=9,	NET_CORE_OPTMEM_MAX=10,	NET_CORE_HOT_LIST_LENGTH=11,	NET_CORE_DIVERT_VERSION=12,	NET_CORE_NO_CONG_THRESH=13,	NET_CORE_NO_CONG=14,	NET_CORE_LO_CONG=15,	NET_CORE_MOD_CONG=16};/* /proc/sys/net/ethernet *//* /proc/sys/net/802 *//* /proc/sys/net/unix */enum{	NET_UNIX_DESTROY_DELAY=1,	NET_UNIX_DELETE_DELAY=2,	NET_UNIX_MAX_DGRAM_QLEN=3,};/* /proc/sys/net/ipv4 */enum{	/* v2.0 compatibile variables */	NET_IPV4_FORWARD=8,	NET_IPV4_DYNADDR=9,	NET_IPV4_CONF=16,	NET_IPV4_NEIGH=17,	NET_IPV4_ROUTE=18,	NET_IPV4_FIB_HASH=19,	NET_IPV4_TCP_TIMESTAMPS=33,	NET_IPV4_TCP_WINDOW_SCALING=34,	NET_IPV4_TCP_SACK=35,	NET_IPV4_TCP_RETRANS_COLLAPSE=36,	NET_IPV4_DEFAULT_TTL=37,	NET_IPV4_AUTOCONFIG=38,	NET_IPV4_NO_PMTU_DISC=39,	NET_IPV4_TCP_SYN_RETRIES=40,	NET_IPV4_IPFRAG_HIGH_THRESH=41,	NET_IPV4_IPFRAG_LOW_THRESH=42,	NET_IPV4_IPFRAG_TIME=43,	NET_IPV4_TCP_MAX_KA_PROBES=44,	NET_IPV4_TCP_KEEPALIVE_TIME=45,	NET_IPV4_TCP_KEEPALIVE_PROBES=46,	NET_IPV4_TCP_RETRIES1=47,	NET_IPV4_TCP_RETRIES2=48,	NET_IPV4_TCP_FIN_TIMEOUT=49,	NET_IPV4_IP_MASQ_DEBUG=50,	NET_TCP_SYNCOOKIES=51,	NET_TCP_STDURG=52,	NET_TCP_RFC1337=53,	NET_TCP_SYN_TAILDROP=54,	NET_TCP_MAX_SYN_BACKLOG=55,	NET_IPV4_LOCAL_PORT_RANGE=56,	NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,	NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,	NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,	NET_IPV4_ICMP_DESTUNREACH_RATE=60,	NET_IPV4_ICMP_TIMEEXCEED_RATE=61,	NET_IPV4_ICMP_PARAMPROB_RATE=62,	NET_IPV4_ICMP_ECHOREPLY_RATE=63,	NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,	NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,	NET_TCP_TW_RECYCLE=66,	NET_IPV4_ALWAYS_DEFRAG=67,	NET_IPV4_TCP_KEEPALIVE_INTVL=68,	NET_IPV4_INET_PEER_THRESHOLD=69,	NET_IPV4_INET_PEER_MINTTL=70,	NET_IPV4_INET_PEER_MAXTTL=71,	NET_IPV4_INET_PEER_GC_MINTIME=72,	NET_IPV4_INET_PEER_GC_MAXTIME=73,	NET_TCP_ORPHAN_RETRIES=74,	NET_TCP_ABORT_ON_OVERFLOW=75,	NET_TCP_SYNACK_RETRIES=76,	NET_TCP_MAX_ORPHANS=77,	NET_TCP_MAX_TW_BUCKETS=78,	NET_TCP_FACK=79,	NET_TCP_REORDERING=80,	NET_TCP_ECN=81,	NET_TCP_DSACK=82,	NET_TCP_MEM=83,	NET_TCP_WMEM=84,	NET_TCP_RMEM=85,	NET_TCP_APP_WIN=86,	NET_TCP_ADV_WIN_SCALE=87,	NET_IPV4_NONLOCAL_BIND=88,	NET_IPV4_ICMP_RATELIMIT=89,	NET_IPV4_ICMP_RATEMASK=90};enum {	NET_IPV4_ROUTE_FLUSH=1,	NET_IPV4_ROUTE_MIN_DELAY=2,	NET_IPV4_ROUTE_MAX_DELAY=3,	NET_IPV4_ROUTE_GC_THRESH=4,	NET_IPV4_ROUTE_MAX_SIZE=5,	NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,	NET_IPV4_ROUTE_GC_TIMEOUT=7,	NET_IPV4_ROUTE_GC_INTERVAL=8,	NET_IPV4_ROUTE_REDIRECT_LOAD=9,	NET_IPV4_ROUTE_REDIRECT_NUMBER=10,	NET_IPV4_ROUTE_REDIRECT_SILENCE=11,	NET_IPV4_ROUTE_ERROR_COST=12,	NET_IPV4_ROUTE_ERROR_BURST=13,	NET_IPV4_ROUTE_GC_ELASTICITY=14,	NET_IPV4_ROUTE_MTU_EXPIRES=15,	NET_IPV4_ROUTE_MIN_PMTU=16,	NET_IPV4_ROUTE_MIN_ADVMSS=17};enum{	NET_PROTO_CONF_ALL=-2,	NET_PROTO_CONF_DEFAULT=-3	/* And device ifindices ... */};enum{	NET_IPV4_CONF_FORWARDING=1,	NET_IPV4_CONF_MC_FORWARDING=2,	NET_IPV4_CONF_PROXY_ARP=3,	NET_IPV4_CONF_ACCEPT_REDIRECTS=4,	NET_IPV4_CONF_SECURE_REDIRECTS=5,	NET_IPV4_CONF_SEND_REDIRECTS=6,	NET_IPV4_CONF_SHARED_MEDIA=7,	NET_IPV4_CONF_RP_FILTER=8,	NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,	NET_IPV4_CONF_BOOTP_RELAY=10,	NET_IPV4_CONF_LOG_MARTIANS=11,	NET_IPV4_CONF_TAG=12,	NET_IPV4_CONF_ARPFILTER=13};/* /proc/sys/net/ipv6 */enum {	NET_IPV6_CONF=16,	NET_IPV6_NEIGH=17,	NET_IPV6_ROUTE=18};enum {	NET_IPV6_ROUTE_FLUSH=1,	NET_IPV6_ROUTE_GC_THRESH=2,	NET_IPV6_ROUTE_MAX_SIZE=3,	NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,	NET_IPV6_ROUTE_GC_TIMEOUT=5,	NET_IPV6_ROUTE_GC_INTERVAL=6,	NET_IPV6_ROUTE_GC_ELASTICITY=7,	NET_IPV6_ROUTE_MTU_EXPIRES=8,	NET_IPV6_ROUTE_MIN_ADVMSS=9};enum {	NET_IPV6_FORWARDING=1,	NET_IPV6_HOP_LIMIT=2,	NET_IPV6_MTU=3,	NET_IPV6_ACCEPT_RA=4,	NET_IPV6_ACCEPT_REDIRECTS=5,	NET_IPV6_AUTOCONF=6,	NET_IPV6_DAD_TRANSMITS=7,	NET_IPV6_RTR_SOLICITS=8,	NET_IPV6_RTR_SOLICIT_INTERVAL=9,	NET_IPV6_RTR_SOLICIT_DELAY=10};