/*
* 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
**
****************************************************************
****************************************************************
*/
#include <linux/lists.h>
#ifndef _LINUX_SYSCTL_H
#define _LINUX_SYSCTL_H
#define CTL_MAXNAME 10
struct __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
#endif
enum
{
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 /* Buses */
};
/* 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_JAVA_INTERPRETER=19, /* path to Java(tm) interpreter */
KERN_JAVA_APPLETVIEWER=20, /* path to Java(tm) appletviewer */
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, /* int: 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 */
};
/* CTL_VM names: */
enum
{
VM_SWAPCTL=1, /* struct: Set vm swapping control */
VM_SWAPOUT=2, /* int: Background pageout interval */
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 */
};
/* 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
};
/* /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
};
/* /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
};
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
};
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
};
/* /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
};
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
};
/* /proc/sys/net/<protocol>/neigh/<dev> */
enum {
NET_NEIGH_MCAST_SOLICIT=1,
NET_NEIGH_UCAST_SOLICIT=2,
NET_NEIGH_APP_SOLICIT=3,
NET_NEIGH_RETRANS_TIME=4,
NET_NEIGH_REACHABLE_TIME=5,
NET_NEIGH_DELAY_PROBE_TIME=6,
NET_NEIGH_GC_STALE_TIME=7,
NET_NEIGH_UNRES_QLEN=8,
NET_NEIGH_PROXY_QLEN=9,
NET_NEIGH_ANYCAST_DELAY=10,
NET_NEIGH_PROXY_DELAY=11,
NET_NEIGH_LOCKTIME=12,
NET_NEIGH_GC_INTERVAL=13,
NET_NEIGH_GC_THRESH1=14,
NET_NEIGH_GC_THRESH2=15,
NET_NEIGH_GC_THRESH3=16
};
/* /proc/sys/net/ipx */
/* /proc/sys/net/appletalk */
enum {
NET_ATALK_AARP_EXPIRY_TIME=1,
NET_ATALK_AARP_TICK_TIME=2,
NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
NET_ATALK_AARP_RESOLVE_TIME=4
};
/* /proc/sys/net/netrom */
enum {
NET_NETROM_DEFAULT_PATH_QUALITY=1,
NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
NET_NETROM_NETWORK_TTL_INITIALISER=3,
NET_NETROM_TRANSPORT_TIMEOUT=4,
NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
NET_NETROM_TRANSPORT_BUSY_DELAY=7,
NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
NET_NETROM_ROUTING_CONTROL=10,
NET_NETROM_LINK_FAILS_COUNT=11
};
/* /proc/sys/net/ax25 */
enum {
NET_AX25_IP_DEFAULT_MODE=1,
NET_AX25_DEFAULT_MODE=2,
NET_AX25_BACKOFF_TYPE=3,
NET_AX25_CONNECT_MODE=4,
NET_AX25_STANDARD_WINDOW=5,
NET_AX25_EXTENDED_WINDOW=6,
NET_AX25_T1_TIMEOUT=7,
NET_AX25_T2_TIMEOUT=8,
NET_AX25_T3_TIMEOUT=9,
NET_AX25_IDLE_TIMEOUT=10,
NET_AX25_N2=11,
NET_AX25_PACLEN=12,
NET_AX25_PROTOCOL=13,
NET_AX25_DAMA_SLAVE_TIMEOUT=14
};
/* /proc/sys/net/rose */
enum {
NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
NET_ROSE_CALL_REQUEST_TIMEOUT=2,
NET_ROSE_RESET_REQUEST_TIMEOUT=3,
NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
NET_ROSE_ROUTING_CONTROL=6,
NET_ROSE_LINK_FAIL_TIMEOUT=7,
NET_ROSE_MAX_VCS=8,
NET_ROSE_WINDOW_SIZE=9,
NET_ROSE_NO_ACTIVITY_TIMEOUT=10
};
/* /proc/sys/net/x25 */
enum {
NET_X25_RESTART_REQUEST_TIMEOUT=1,
NET_X25_CALL_REQUEST_TIMEOUT=2,
NET_X25_RESET_REQUEST_TIMEOUT=3,
NET_X25_CLEAR_REQUEST_TIMEOUT=4,
NET_X25_ACK_HOLD_BACK_TIMEOUT=5
};
/* /proc/sys/net/token-ring */
enum
{
NET_TR_RIF_TIMEOUT=1
};
/* /proc/sys/net/decnet */
enum {
NET_DECNET_DEF_T3_BROADCAST=1,
NET_DECNET_DEF_T3_POINTTOPOINT=2,
NET_DECNET_DEF_T1=3,
NET_DECNET_DEF_BCT1=4,
NET_DECNET_CACHETIMEOUT=5,
NET_DECNET_DEBUG_LEVEL=6
};
/* CTL_PROC names: */
/* CTL_FS names: */
enum
{
FS_NRINODE=1, /* int:current number of allocated inodes */
FS_STATINODE=2,
FS_MAXINODE=3, /* int:maximum number of inodes that can be allocated */
FS_NRDQUOT=4, /* int:current number of allocated dquots */
FS_MAXDQUOT=5, /* int:maximum number of dquots that can be allocated */
FS_NRFILE=6, /* int:current number of allocated filedescriptors */
FS_MAXFILE=7, /* int:maximum number of filedescriptors that can be allocated */
FS_DENTRY=8,
FS_NRSUPER=9, /* int:current number of allocated super_blocks */
FS_MAXSUPER=10 /* int:maximum number of super_blocks that can be allocated */
};
/* CTL_DEBUG names: */
/* CTL_DEV names: */
enum {
DEV_CDROM=1,
DEV_HWMON=2
};
/* /proc/sys/dev/cdrom */
enum {
DEV_CDROM_INFO=1
};
#ifdef __KERNEL__
extern asmlinkage int sys_sysctl(struct __sysctl_args *);
extern void sysctl_init(void);
typedef struct ctl_table ctl_table;
typedef int ctl_handler (ctl_table *table, int *name, int nlen,
void *oldval, size_t *oldlenp,
void *newval, size_t newlen,
void **context);
typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
void *buffer, size_t *lenp);
extern int proc_dostring(ctl_table *, int, struct file *,
void *, size_t *);
extern int proc_dointvec(ctl_table *, int, struct file *,
void *, size_t *);
extern int proc_dointvec_bset(ctl_table *, int, struct file *,
void *, size_t *);
extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
void *, size_t *);
extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
void *, size_t *);
extern int do_sysctl (int *name, int nlen,
void *oldval, size_t *oldlenp,
void *newval, size_t newlen);
extern int do_sysctl_strategy (ctl_table *table,
int *name, int nlen,
void *oldval, size_t *oldlenp,
void *newval, size_t newlen, void ** context);
extern ctl_handler sysctl_string;
extern ctl_handler sysctl_intvec;
extern ctl_handler sysctl_jiffies;
extern int do_string (
void *oldval, size_t *oldlenp, void *newval, size_t newlen,
int rdwr, char *data, size_t max);
extern int do_int (
void *oldval, size_t *oldlenp, void *newval, size_t newlen,
int rdwr, int *data);
extern int do_struct (
void *oldval, size_t *oldlenp, void *newval, size_t newlen,
int rdwr, void *data, size_t len);
/*
* Register a set of sysctl names by calling register_sysctl_table
* with an initialised array of ctl_table's. An entry with zero
* ctl_name terminates the table. table->de will be set up by the
* registration and need not be initialised in advance.
*
* sysctl names can be mirrored automatically under /proc/sys. The
* procname supplied controls /proc naming.
*
* The table's mode will be honoured both for sys_sysctl(2) and
* proc-fs access.
*
* Leaf nodes in the sysctl tree will be represented by a single file
* under /proc; non-leaf nodes will be represented by directories. A
* null procname disables /proc mirroring at this node.
*
* sysctl(2) can automatically manage read and write requests through
* the sysctl table. The data and maxlen fields of the ctl_table
* struct enable minimal validation of the values being written to be
* performed, and the mode field allows minimal authentication.
*
* More sophisticated management can be enabled by the provision of a
* strategy routine with the table entry. This will be called before
* any automatic read or write of the data is performed.
*
* The strategy routine may return:
* <0: Error occurred (error is passed to user process)
* 0: OK - proceed with automatic read or write.
* >0: OK - read or write has been done by the strategy routine, so
* return immediately.
*
* There must be a proc_handler routine for any terminal nodes
* mirrored under /proc/sys (non-terminals are handled by a built-in
* directory handler). Several default handlers are available to
* cover common cases.
*/
/* A sysctl table is an array of struct ctl_table: */
struct ctl_table
{
int ctl_name; /* Binary ID */
const char *procname; /* Text ID for /proc/sys, or zero */
void *data;
int maxlen;
mode_t mode;
ctl_table *child;
proc_handler *proc_handler; /* Callback for text formatting */
ctl_handler *strategy; /* Callback function for all r/w */
struct proc_dir_entry *de; /* /proc control block */
void *extra1;
void *extra2;
};
/* struct ctl_table_header is used to maintain dynamic lists of
ctl_table trees. */
struct ctl_table_header
{
ctl_table *ctl_table;
DLNODE(struct ctl_table_header) ctl_entry;
};
struct ctl_table_header * register_sysctl_table(ctl_table * table,
int insert_at_head);
void unregister_sysctl_table(struct ctl_table_header * table);
#else /* __KERNEL__ */
#endif /* __KERNEL__ */
#endif /* _LINUX_SYSCTL_H */