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/*

 * sysctl.h: General linux system control interface

 *

 * Begun 24 March 1995, Stephen Tweedie

 */

#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

#define CTL_KERN        1       /* General kernel info and control */

#define CTL_VM          2       /* VM management */

#define CTL_NET         3       /* Networking */

#define CTL_PROC        4       /* Process info */

#define CTL_FS          5       /* Filesystems */

#define CTL_DEBUG       6       /* Debugging */

#define CTL_DEV         7       /* Devices */

#define CTL_MAXID       8

/* CTL_KERN names: */

#define KERN_OSTYPE     1       /* string: system version */

#define KERN_OSRELEASE  2       /* string: system release */

#define KERN_OSREV      3       /* int: system revision */

#define KERN_VERSION    4       /* string: compile time info */

#define KERN_SECUREMASK 5       /* struct: maximum rights mask */

#define KERN_PROF       6       /* table: profiling information */

#define KERN_NODENAME   7

#define KERN_DOMAINNAME 8

#define KERN_NRINODE    9

#define KERN_MAXINODE   10

#define KERN_NRFILE     11

#define KERN_MAXFILE    12

#define KERN_MAXID      13

#define KERN_SECURELVL  14      /* int: system security level */

#define KERN_PANIC      15      /* int: panic timeout */

#define KERN_REALROOTDEV 16     /* real root device to mount after initrd */

#define KERN_NFSRNAME   17      /* NFS root name */

#define KERN_NFSRADDRS  18      /* NFS root addresses */

#define KERN_JAVA_INTERPRETER 19 /* path to Java(tm) interpreter */

#define KERN_JAVA_APPLETVIEWER 20 /* path to Java(tm) appletviewer */

/* CTL_VM names: */

#define VM_SWAPCTL      1       /* struct: Set vm swapping control */

#define VM_KSWAPD       2       /* struct: control background pageout */

#define VM_FREEPG       3       /* struct: Set free page thresholds */

#define VM_BDFLUSH      4       /* struct: Control buffer cache flushing */

#define VM_MAXID        5

/* CTL_NET names: */

#define NET_CORE        1

#define NET_ETHER       2

#define NET_802         3

#define NET_UNIX        4

#define NET_IPV4        5

#define NET_IPX         6

#define NET_ATALK       7

#define NET_NETROM      8

#define NET_AX25        9

#define NET_BRIDGE      10

#define NET_ROSE        11

/* /proc/sys/net/core */

#define NET_CORE_NET_ALIAS_MAX 1

/* /proc/sys/net/ethernet */

/* /proc/sys/net/802 */

/* /proc/sys/net/unix */

/* /proc/sys/net/ipv4 */

#define NET_IPV4_ARP_RES_TIME           1

#define NET_IPV4_ARP_DEAD_RES_TIME      2

#define NET_IPV4_ARP_MAX_TRIES          3

#define NET_IPV4_ARP_TIMEOUT            4

#define NET_IPV4_ARP_CHECK_INTERVAL     5

#define NET_IPV4_ARP_CONFIRM_INTERVAL   6

#define NET_IPV4_ARP_CONFIRM_TIMEOUT    7

#define NET_IPV4_FORWARD                8

#define NET_IPV4_DYNADDR                9

/* /proc/sys/net/ipx */

/* /proc/sys/net/appletalk */

/* /proc/sys/net/netrom */

#define NET_NETROM_DEFAULT_PATH_QUALITY                 1

#define NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER       2

#define NET_NETROM_NETWORK_TTL_INITIALISER              3

#define NET_NETROM_TRANSPORT_TIMEOUT                    4

#define NET_NETROM_TRANSPORT_MAXIMUM_TRIES              5

#define NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY          6

#define NET_NETROM_TRANSPORT_BUSY_DELAY                 7

#define NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE      8

#define NET_NETROM_ROUTING_CONTROL                      9

#define NET_NETROM_LINK_FAILS_COUNT                     10

/* /proc/sys/net/ax25 */

#define NET_AX25_IP_DEFAULT_MODE                        1

#define NET_AX25_DEFAULT_MODE                           2

#define NET_AX25_BACKOFF_TYPE                           3

#define NET_AX25_CONNECT_MODE                           4

#define NET_AX25_STANDARD_WINDOW                        5

#define NET_AX25_EXTENDED_WINDOW                        6

#define NET_AX25_T1_TIMEOUT                             7

#define NET_AX25_T2_TIMEOUT                             8

#define NET_AX25_T3_TIMEOUT                             9

#define NET_AX25_IDLE_TIMEOUT                           10

#define NET_AX25_N2                                     11

#define NET_AX25_PACLEN                                 12

/* /proc/sys/net/rose */

#define NET_ROSE_RESTART_REQUEST_TIMEOUT                1

#define NET_ROSE_CALL_REQUEST_TIMEOUT                   2

#define NET_ROSE_RESET_REQUEST_TIMEOUT                  3

#define NET_ROSE_CLEAR_REQUEST_TIMEOUT                  4

#define NET_ROSE_ACK_HOLD_BACK_TIMEOUT                  5

#define NET_ROSE_ROUTING_CONTROL                        6

#define NET_ROSE_LINK_FAIL_TIMEOUT                      7

#define NET_ROSE_MAX_VCS                                8

#define NET_ROSE_WINDOW_SIZE                            9

/* CTL_PROC names: */

/* CTL_FS names: */

/* CTL_DEBUG names: */

/* CTL_DEV names: */

#ifdef __KERNEL__

extern asmlinkage int sys_sysctl(struct __sysctl_args *);

extern void init_sysctl(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_minmax(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 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 */