include/linux/sysctl.h

   1 /*
   2  * sysctl.h: General linux system control interface
   3  *
   4  * Begun 24 March 1995, Stephen Tweedie
   5  *
   6  ****************************************************************
   7  ****************************************************************
   8  **
   9  **  WARNING:
  10  **  The values in this file are exported to user space via
  11  **  the sysctl() binary interface.  Do *NOT* change the
  12  **  numbering of any existing values here, and do not change
  13  **  any numbers within any one set of values.  If you have to
  14  **  redefine an existing interface, use a new number for it.
  15  **  The kernel will then return -ENOTDIR to any application using
  16  **  the old binary interface.
  17  **
  18  **  For new interfaces unless you really need a binary number
  19  **  please use CTL_UNNUMBERED.
  20  **
  21  ****************************************************************
  22  ****************************************************************
  23  */
  24
  25 #ifndef _LINUX_SYSCTL_H
  26 #define _LINUX_SYSCTL_H
  27
  28 #include <linux/kernel.h>
  29 #include <linux/types.h>
  30 #include <linux/compiler.h>
  31
  32 struct file;
  33 struct completion;
  34
  35 #define CTL_MAXNAME 10          /* how many path components do we allow in a
  36                                    call to sysctl?   In other words, what is
  37                                    the largest acceptable value for the nlen
  38                                    member of a struct __sysctl_args to have? */
  39
  40 struct __sysctl_args {
  41         int __user *name;
  42         int nlen;
  43         void __user *oldval;
  44         size_t __user *oldlenp;
  45         void __user *newval;
  46         size_t newlen;
  47         unsigned long __unused[4];
  48 };
  49
  50 /* Define sysctl names first */
  51
  52 /* Top-level names: */
  53
  54 /* For internal pattern-matching use only: */
  55 #ifdef __KERNEL__
  56 #define CTL_ANY         -1      /* Matches any name */
  57 #define CTL_NONE        0
  58 #define CTL_UNNUMBERED  CTL_NONE        /* sysctl without a binary number */
  59 #endif
  60
  61 enum
  62 {
  63         CTL_KERN=1,             /* General kernel info and control */
  64         CTL_VM=2,               /* VM management */
  65         CTL_NET=3,              /* Networking */
  66         /* was CTL_PROC */
  67         CTL_FS=5,               /* Filesystems */
  68         CTL_DEBUG=6,            /* Debugging */
  69         CTL_DEV=7,              /* Devices */
  70         CTL_BUS=8,              /* Busses */
  71         CTL_ABI=9,              /* Binary emulation */
  72         CTL_CPU=10,             /* CPU stuff (speed scaling, etc) */
  73         CTL_SUNRPC=7249,        /* sunrpc debug */
  74         CTL_PM=9899,            /* frv power management */
  75 };
  76
  77 /* CTL_BUS names: */
  78 enum
  79 {
  80         CTL_BUS_ISA=1           /* ISA */
  81 };
  82
  83 /* /proc/sys/fs/inotify/ */
  84 enum
  85 {
  86         INOTIFY_MAX_USER_INSTANCES=1,   /* max instances per user */
  87         INOTIFY_MAX_USER_WATCHES=2,     /* max watches per user */
  88         INOTIFY_MAX_QUEUED_EVENTS=3     /* max queued events per instance */
  89 };
  90
  91 /* CTL_KERN names: */
  92 enum
  93 {
  94         KERN_OSTYPE=1,          /* string: system version */
  95         KERN_OSRELEASE=2,       /* string: system release */
  96         KERN_OSREV=3,           /* int: system revision */
  97         KERN_VERSION=4,         /* string: compile time info */
  98         KERN_SECUREMASK=5,      /* struct: maximum rights mask */
  99         KERN_PROF=6,            /* table: profiling information */
 100         KERN_NODENAME=7,
 101         KERN_DOMAINNAME=8,
 102
 103         KERN_CAP_BSET=14,       /* int: capability bounding set */
 104         KERN_PANIC=15,          /* int: panic timeout */
 105         KERN_REALROOTDEV=16,    /* real root device to mount after initrd */
 106
 107         KERN_SPARC_REBOOT=21,   /* reboot command on Sparc */
 108         KERN_CTLALTDEL=22,      /* int: allow ctl-alt-del to reboot */
 109         KERN_PRINTK=23,         /* struct: control printk logging parameters */
 110         KERN_NAMETRANS=24,      /* Name translation */
 111         KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */
 112         KERN_PPC_ZEROPAGED=26,  /* turn idle page zeroing on/off on PPC */
 113         KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */
 114         KERN_MODPROBE=28,
 115         KERN_SG_BIG_BUFF=29,
 116         KERN_ACCT=30,           /* BSD process accounting parameters */
 117         KERN_PPC_L2CR=31,       /* l2cr register on PPC */
 118
 119         KERN_RTSIGNR=32,        /* Number of rt sigs queued */
 120         KERN_RTSIGMAX=33,       /* Max queuable */
 121
 122         KERN_SHMMAX=34,         /* long: Maximum shared memory segment */
 123         KERN_MSGMAX=35,         /* int: Maximum size of a messege */
 124         KERN_MSGMNB=36,         /* int: Maximum message queue size */
 125         KERN_MSGPOOL=37,        /* int: Maximum system message pool size */
 126         KERN_SYSRQ=38,          /* int: Sysreq enable */
 127         KERN_MAX_THREADS=39,    /* int: Maximum nr of threads in the system */
 128         KERN_RANDOM=40,         /* Random driver */
 129         KERN_SHMALL=41,         /* int: Maximum size of shared memory */
 130         KERN_MSGMNI=42,         /* int: msg queue identifiers */
 131         KERN_SEM=43,            /* struct: sysv semaphore limits */
 132         KERN_SPARC_STOP_A=44,   /* int: Sparc Stop-A enable */
 133         KERN_SHMMNI=45,         /* int: shm array identifiers */
 134         KERN_OVERFLOWUID=46,    /* int: overflow UID */
 135         KERN_OVERFLOWGID=47,    /* int: overflow GID */
 136         KERN_SHMPATH=48,        /* string: path to shm fs */
 137         KERN_HOTPLUG=49,        /* string: path to uevent helper (deprecated) */
 138         KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
 139         KERN_S390_USER_DEBUG_LOGGING=51,  /* int: dumps of user faults */
 140         KERN_CORE_USES_PID=52,          /* int: use core or core.%pid */
 141         KERN_TAINTED=53,        /* int: various kernel tainted flags */
 142         KERN_CADPID=54,         /* int: PID of the process to notify on CAD */
 143         KERN_PIDMAX=55,         /* int: PID # limit */
 144         KERN_CORE_PATTERN=56,   /* string: pattern for core-file names */
 145         KERN_PANIC_ON_OOPS=57,  /* int: whether we will panic on an oops */
 146         KERN_HPPA_PWRSW=58,     /* int: hppa soft-power enable */
 147         KERN_HPPA_UNALIGNED=59, /* int: hppa unaligned-trap enable */
 148         KERN_PRINTK_RATELIMIT=60, /* int: tune printk ratelimiting */
 149         KERN_PRINTK_RATELIMIT_BURST=61, /* int: tune printk ratelimiting */
 150         KERN_PTY=62,            /* dir: pty driver */
 151         KERN_NGROUPS_MAX=63,    /* int: NGROUPS_MAX */
 152         KERN_SPARC_SCONS_PWROFF=64, /* int: serial console power-off halt */
 153         KERN_HZ_TIMER=65,       /* int: hz timer on or off */
 154         KERN_UNKNOWN_NMI_PANIC=66, /* int: unknown nmi panic flag */
 155         KERN_BOOTLOADER_TYPE=67, /* int: boot loader type */
 156         KERN_RANDOMIZE=68, /* int: randomize virtual address space */
 157         KERN_SETUID_DUMPABLE=69, /* int: behaviour of dumps for setuid core */
 158         KERN_SPIN_RETRY=70,     /* int: number of spinlock retries */
 159         KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */
 160         KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */
 161         KERN_COMPAT_LOG=73,     /* int: print compat layer  messages */
 162         KERN_MAX_LOCK_DEPTH=74,
 163         KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
 164         KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
 165 };
 166
 167
 168
 169 /* CTL_VM names: */
 170 enum
 171 {
 172         VM_UNUSED1=1,           /* was: struct: Set vm swapping control */
 173         VM_UNUSED2=2,           /* was; int: Linear or sqrt() swapout for hogs */
 174         VM_UNUSED3=3,           /* was: struct: Set free page thresholds */
 175         VM_UNUSED4=4,           /* Spare */
 176         VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
 177         VM_UNUSED5=6,           /* was: struct: Set buffer memory thresholds */
 178         VM_UNUSED7=7,           /* was: struct: Set cache memory thresholds */
 179         VM_UNUSED8=8,           /* was: struct: Control kswapd behaviour */
 180         VM_UNUSED9=9,           /* was: struct: Set page table cache parameters */
 181         VM_PAGE_CLUSTER=10,     /* int: set number of pages to swap together */
 182         VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
 183         VM_DIRTY_RATIO=12,      /* dirty_ratio */
 184         VM_DIRTY_WB_CS=13,      /* dirty_writeback_centisecs */
 185         VM_DIRTY_EXPIRE_CS=14,  /* dirty_expire_centisecs */
 186         VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
 187         VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
 188         VM_PAGEBUF=17,          /* struct: Control pagebuf parameters */
 189         VM_HUGETLB_PAGES=18,    /* int: Number of available Huge Pages */
 190         VM_SWAPPINESS=19,       /* Tendency to steal mapped memory */
 191         VM_LOWMEM_RESERVE_RATIO=20,/* reservation ratio for lower memory zones */
 192         VM_MIN_FREE_KBYTES=21,  /* Minimum free kilobytes to maintain */
 193         VM_MAX_MAP_COUNT=22,    /* int: Maximum number of mmaps/address-space */
 194         VM_LAPTOP_MODE=23,      /* vm laptop mode */
 195         VM_BLOCK_DUMP=24,       /* block dump mode */
 196         VM_HUGETLB_GROUP=25,    /* permitted hugetlb group */
 197         VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
 198         VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
 199         VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
 200         VM_DROP_PAGECACHE=29,   /* int: nuke lots of pagecache */
 201         VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */
 202         VM_ZONE_RECLAIM_MODE=31, /* reclaim local zone memory before going off node */
 203         VM_MIN_UNMAPPED=32,     /* Set min percent of unmapped pages */
 204         VM_PANIC_ON_OOM=33,     /* panic at out-of-memory */
 205         VM_VDSO_ENABLED=34,     /* map VDSO into new processes? */
 206         VM_MIN_SLAB=35,          /* Percent pages ignored by zone reclaim */
 207 };
 208
 209
 210 /* CTL_NET names: */
 211 enum
 212 {
 213         NET_CORE=1,
 214         NET_ETHER=2,
 215         NET_802=3,
 216         NET_UNIX=4,
 217         NET_IPV4=5,
 218         NET_IPX=6,
 219         NET_ATALK=7,
 220         NET_NETROM=8,
 221         NET_AX25=9,
 222         NET_BRIDGE=10,
 223         NET_ROSE=11,
 224         NET_IPV6=12,
 225         NET_X25=13,
 226         NET_TR=14,
 227         NET_DECNET=15,
 228         NET_ECONET=16,
 229         NET_SCTP=17,
 230         NET_LLC=18,
 231         NET_NETFILTER=19,
 232         NET_DCCP=20,
 233 };
 234
 235 /* /proc/sys/kernel/random */
 236 enum
 237 {
 238         RANDOM_POOLSIZE=1,
 239         RANDOM_ENTROPY_COUNT=2,
 240         RANDOM_READ_THRESH=3,
 241         RANDOM_WRITE_THRESH=4,
 242         RANDOM_BOOT_ID=5,
 243         RANDOM_UUID=6
 244 };
 245
 246 /* /proc/sys/kernel/pty */
 247 enum
 248 {
 249         PTY_MAX=1,
 250         PTY_NR=2
 251 };
 252
 253 /* /proc/sys/bus/isa */
 254 enum
 255 {
 256         BUS_ISA_MEM_BASE=1,
 257         BUS_ISA_PORT_BASE=2,
 258         BUS_ISA_PORT_SHIFT=3
 259 };
 260
 261 /* /proc/sys/net/core */
 262 enum
 263 {
 264         NET_CORE_WMEM_MAX=1,
 265         NET_CORE_RMEM_MAX=2,
 266         NET_CORE_WMEM_DEFAULT=3,
 267         NET_CORE_RMEM_DEFAULT=4,
 268 /* was  NET_CORE_DESTROY_DELAY */
 269         NET_CORE_MAX_BACKLOG=6,
 270         NET_CORE_FASTROUTE=7,
 271         NET_CORE_MSG_COST=8,
 272         NET_CORE_MSG_BURST=9,
 273         NET_CORE_OPTMEM_MAX=10,
 274         NET_CORE_HOT_LIST_LENGTH=11,
 275         NET_CORE_DIVERT_VERSION=12,
 276         NET_CORE_NO_CONG_THRESH=13,
 277         NET_CORE_NO_CONG=14,
 278         NET_CORE_LO_CONG=15,
 279         NET_CORE_MOD_CONG=16,
 280         NET_CORE_DEV_WEIGHT=17,
 281         NET_CORE_SOMAXCONN=18,
 282         NET_CORE_BUDGET=19,
 283         NET_CORE_AEVENT_ETIME=20,
 284         NET_CORE_AEVENT_RSEQTH=21,
 285 };
 286
 287 /* /proc/sys/net/ethernet */
 288
 289 /* /proc/sys/net/802 */
 290
 291 /* /proc/sys/net/unix */
 292
 293 enum
 294 {
 295         NET_UNIX_DESTROY_DELAY=1,
 296         NET_UNIX_DELETE_DELAY=2,
 297         NET_UNIX_MAX_DGRAM_QLEN=3,
 298 };
 299
 300 /* /proc/sys/net/netfilter */
 301 enum
 302 {
 303         NET_NF_CONNTRACK_MAX=1,
 304         NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
 305         NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
 306         NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
 307         NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
 308         NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
 309         NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
 310         NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
 311         NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
 312         NET_NF_CONNTRACK_UDP_TIMEOUT=10,
 313         NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
 314         NET_NF_CONNTRACK_ICMP_TIMEOUT=12,
 315         NET_NF_CONNTRACK_GENERIC_TIMEOUT=13,
 316         NET_NF_CONNTRACK_BUCKETS=14,
 317         NET_NF_CONNTRACK_LOG_INVALID=15,
 318         NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
 319         NET_NF_CONNTRACK_TCP_LOOSE=17,
 320         NET_NF_CONNTRACK_TCP_BE_LIBERAL=18,
 321         NET_NF_CONNTRACK_TCP_MAX_RETRANS=19,
 322         NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
 323         NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
 324         NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
 325         NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
 326         NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
 327         NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
 328         NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
 329         NET_NF_CONNTRACK_COUNT=27,
 330         NET_NF_CONNTRACK_ICMPV6_TIMEOUT=28,
 331         NET_NF_CONNTRACK_FRAG6_TIMEOUT=29,
 332         NET_NF_CONNTRACK_FRAG6_LOW_THRESH=30,
 333         NET_NF_CONNTRACK_FRAG6_HIGH_THRESH=31,
 334         NET_NF_CONNTRACK_CHECKSUM=32,
 335 };
 336
 337 /* /proc/sys/net/ipv4 */
 338 enum
 339 {
 340         /* v2.0 compatibile variables */
 341         NET_IPV4_FORWARD=8,
 342         NET_IPV4_DYNADDR=9,
 343
 344         NET_IPV4_CONF=16,
 345         NET_IPV4_NEIGH=17,
 346         NET_IPV4_ROUTE=18,
 347         NET_IPV4_FIB_HASH=19,
 348         NET_IPV4_NETFILTER=20,
 349
 350         NET_IPV4_TCP_TIMESTAMPS=33,
 351         NET_IPV4_TCP_WINDOW_SCALING=34,
 352         NET_IPV4_TCP_SACK=35,
 353         NET_IPV4_TCP_RETRANS_COLLAPSE=36,
 354         NET_IPV4_DEFAULT_TTL=37,
 355         NET_IPV4_AUTOCONFIG=38,
 356         NET_IPV4_NO_PMTU_DISC=39,
 357         NET_IPV4_TCP_SYN_RETRIES=40,
 358         NET_IPV4_IPFRAG_HIGH_THRESH=41,
 359         NET_IPV4_IPFRAG_LOW_THRESH=42,
 360         NET_IPV4_IPFRAG_TIME=43,
 361         NET_IPV4_TCP_MAX_KA_PROBES=44,
 362         NET_IPV4_TCP_KEEPALIVE_TIME=45,
 363         NET_IPV4_TCP_KEEPALIVE_PROBES=46,
 364         NET_IPV4_TCP_RETRIES1=47,
 365         NET_IPV4_TCP_RETRIES2=48,
 366         NET_IPV4_TCP_FIN_TIMEOUT=49,
 367         NET_IPV4_IP_MASQ_DEBUG=50,
 368         NET_TCP_SYNCOOKIES=51,
 369         NET_TCP_STDURG=52,
 370         NET_TCP_RFC1337=53,
 371         NET_TCP_SYN_TAILDROP=54,
 372         NET_TCP_MAX_SYN_BACKLOG=55,
 373         NET_IPV4_LOCAL_PORT_RANGE=56,
 374         NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
 375         NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
 376         NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
 377         NET_IPV4_ICMP_DESTUNREACH_RATE=60,
 378         NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
 379         NET_IPV4_ICMP_PARAMPROB_RATE=62,
 380         NET_IPV4_ICMP_ECHOREPLY_RATE=63,
 381         NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
 382         NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
 383         NET_TCP_TW_RECYCLE=66,
 384         NET_IPV4_ALWAYS_DEFRAG=67,
 385         NET_IPV4_TCP_KEEPALIVE_INTVL=68,
 386         NET_IPV4_INET_PEER_THRESHOLD=69,
 387         NET_IPV4_INET_PEER_MINTTL=70,
 388         NET_IPV4_INET_PEER_MAXTTL=71,
 389         NET_IPV4_INET_PEER_GC_MINTIME=72,
 390         NET_IPV4_INET_PEER_GC_MAXTIME=73,
 391         NET_TCP_ORPHAN_RETRIES=74,
 392         NET_TCP_ABORT_ON_OVERFLOW=75,
 393         NET_TCP_SYNACK_RETRIES=76,
 394         NET_TCP_MAX_ORPHANS=77,
 395         NET_TCP_MAX_TW_BUCKETS=78,
 396         NET_TCP_FACK=79,
 397         NET_TCP_REORDERING=80,
 398         NET_TCP_ECN=81,
 399         NET_TCP_DSACK=82,
 400         NET_TCP_MEM=83,
 401         NET_TCP_WMEM=84,
 402         NET_TCP_RMEM=85,
 403         NET_TCP_APP_WIN=86,
 404         NET_TCP_ADV_WIN_SCALE=87,
 405         NET_IPV4_NONLOCAL_BIND=88,
 406         NET_IPV4_ICMP_RATELIMIT=89,
 407         NET_IPV4_ICMP_RATEMASK=90,
 408         NET_TCP_TW_REUSE=91,
 409         NET_TCP_FRTO=92,
 410         NET_TCP_LOW_LATENCY=93,
 411         NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
 412         NET_IPV4_IGMP_MAX_MSF=96,
 413         NET_TCP_NO_METRICS_SAVE=97,
 414         NET_TCP_DEFAULT_WIN_SCALE=105,
 415         NET_TCP_MODERATE_RCVBUF=106,
 416         NET_TCP_TSO_WIN_DIVISOR=107,
 417         NET_TCP_BIC_BETA=108,
 418         NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR=109,
 419         NET_TCP_CONG_CONTROL=110,
 420         NET_TCP_ABC=111,
 421         NET_IPV4_IPFRAG_MAX_DIST=112,
 422         NET_TCP_MTU_PROBING=113,
 423         NET_TCP_BASE_MSS=114,
 424         NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS=115,
 425         NET_TCP_DMA_COPYBREAK=116,
 426         NET_TCP_SLOW_START_AFTER_IDLE=117,
 427         NET_CIPSOV4_CACHE_ENABLE=118,
 428         NET_CIPSOV4_CACHE_BUCKET_SIZE=119,
 429         NET_CIPSOV4_RBM_OPTFMT=120,
 430         NET_CIPSOV4_RBM_STRICTVALID=121,
 431         NET_TCP_AVAIL_CONG_CONTROL=122,
 432         NET_TCP_ALLOWED_CONG_CONTROL=123,
 433 };
 434
 435 enum {
 436         NET_IPV4_ROUTE_FLUSH=1,
 437         NET_IPV4_ROUTE_MIN_DELAY=2,
 438         NET_IPV4_ROUTE_MAX_DELAY=3,
 439         NET_IPV4_ROUTE_GC_THRESH=4,
 440         NET_IPV4_ROUTE_MAX_SIZE=5,
 441         NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
 442         NET_IPV4_ROUTE_GC_TIMEOUT=7,
 443         NET_IPV4_ROUTE_GC_INTERVAL=8,
 444         NET_IPV4_ROUTE_REDIRECT_LOAD=9,
 445         NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
 446         NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
 447         NET_IPV4_ROUTE_ERROR_COST=12,
 448         NET_IPV4_ROUTE_ERROR_BURST=13,
 449         NET_IPV4_ROUTE_GC_ELASTICITY=14,
 450         NET_IPV4_ROUTE_MTU_EXPIRES=15,
 451         NET_IPV4_ROUTE_MIN_PMTU=16,
 452         NET_IPV4_ROUTE_MIN_ADVMSS=17,
 453         NET_IPV4_ROUTE_SECRET_INTERVAL=18,
 454         NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS=19,
 455 };
 456
 457 enum
 458 {
 459         NET_PROTO_CONF_ALL=-2,
 460         NET_PROTO_CONF_DEFAULT=-3
 461
 462         /* And device ifindices ... */
 463 };
 464
 465 enum
 466 {
 467         NET_IPV4_CONF_FORWARDING=1,
 468         NET_IPV4_CONF_MC_FORWARDING=2,
 469         NET_IPV4_CONF_PROXY_ARP=3,
 470         NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
 471         NET_IPV4_CONF_SECURE_REDIRECTS=5,
 472         NET_IPV4_CONF_SEND_REDIRECTS=6,
 473         NET_IPV4_CONF_SHARED_MEDIA=7,
 474         NET_IPV4_CONF_RP_FILTER=8,
 475         NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
 476         NET_IPV4_CONF_BOOTP_RELAY=10,
 477         NET_IPV4_CONF_LOG_MARTIANS=11,
 478         NET_IPV4_CONF_TAG=12,
 479         NET_IPV4_CONF_ARPFILTER=13,
 480         NET_IPV4_CONF_MEDIUM_ID=14,
 481         NET_IPV4_CONF_NOXFRM=15,
 482         NET_IPV4_CONF_NOPOLICY=16,
 483         NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
 484         NET_IPV4_CONF_ARP_ANNOUNCE=18,
 485         NET_IPV4_CONF_ARP_IGNORE=19,
 486         NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
 487         NET_IPV4_CONF_ARP_ACCEPT=21,
 488         __NET_IPV4_CONF_MAX
 489 };
 490
 491 /* /proc/sys/net/ipv4/netfilter */
 492 enum
 493 {
 494         NET_IPV4_NF_CONNTRACK_MAX=1,
 495         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
 496         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
 497         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
 498         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
 499         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
 500         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
 501         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
 502         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
 503         NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
 504         NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
 505         NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
 506         NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
 507         NET_IPV4_NF_CONNTRACK_BUCKETS=14,
 508         NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
 509         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
 510         NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
 511         NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
 512         NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
 513         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
 514         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
 515         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
 516         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
 517         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
 518         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
 519         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
 520         NET_IPV4_NF_CONNTRACK_COUNT=27,
 521         NET_IPV4_NF_CONNTRACK_CHECKSUM=28,
 522 };
 523
 524 /* /proc/sys/net/ipv6 */
 525 enum {
 526         NET_IPV6_CONF=16,
 527         NET_IPV6_NEIGH=17,
 528         NET_IPV6_ROUTE=18,
 529         NET_IPV6_ICMP=19,
 530         NET_IPV6_BINDV6ONLY=20,
 531         NET_IPV6_IP6FRAG_HIGH_THRESH=21,
 532         NET_IPV6_IP6FRAG_LOW_THRESH=22,
 533         NET_IPV6_IP6FRAG_TIME=23,
 534         NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
 535         NET_IPV6_MLD_MAX_MSF=25,
 536 };
 537
 538 enum {
 539         NET_IPV6_ROUTE_FLUSH=1,
 540         NET_IPV6_ROUTE_GC_THRESH=2,
 541         NET_IPV6_ROUTE_MAX_SIZE=3,
 542         NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
 543         NET_IPV6_ROUTE_GC_TIMEOUT=5,
 544         NET_IPV6_ROUTE_GC_INTERVAL=6,
 545         NET_IPV6_ROUTE_GC_ELASTICITY=7,
 546         NET_IPV6_ROUTE_MTU_EXPIRES=8,
 547         NET_IPV6_ROUTE_MIN_ADVMSS=9,
 548         NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS=10
 549 };
 550
 551 enum {
 552         NET_IPV6_FORWARDING=1,
 553         NET_IPV6_HOP_LIMIT=2,
 554         NET_IPV6_MTU=3,
 555         NET_IPV6_ACCEPT_RA=4,
 556         NET_IPV6_ACCEPT_REDIRECTS=5,
 557         NET_IPV6_AUTOCONF=6,
 558         NET_IPV6_DAD_TRANSMITS=7,
 559         NET_IPV6_RTR_SOLICITS=8,
 560         NET_IPV6_RTR_SOLICIT_INTERVAL=9,
 561         NET_IPV6_RTR_SOLICIT_DELAY=10,
 562         NET_IPV6_USE_TEMPADDR=11,
 563         NET_IPV6_TEMP_VALID_LFT=12,
 564         NET_IPV6_TEMP_PREFERED_LFT=13,
 565         NET_IPV6_REGEN_MAX_RETRY=14,
 566         NET_IPV6_MAX_DESYNC_FACTOR=15,
 567         NET_IPV6_MAX_ADDRESSES=16,
 568         NET_IPV6_FORCE_MLD_VERSION=17,
 569         NET_IPV6_ACCEPT_RA_DEFRTR=18,
 570         NET_IPV6_ACCEPT_RA_PINFO=19,
 571         NET_IPV6_ACCEPT_RA_RTR_PREF=20,
 572         NET_IPV6_RTR_PROBE_INTERVAL=21,
 573         NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
 574         NET_IPV6_PROXY_NDP=23,
 575         __NET_IPV6_MAX
 576 };
 577
 578 /* /proc/sys/net/ipv6/icmp */
 579 enum {
 580         NET_IPV6_ICMP_RATELIMIT=1
 581 };
 582
 583 /* /proc/sys/net/<protocol>/neigh/<dev> */
 584 enum {
 585         NET_NEIGH_MCAST_SOLICIT=1,
 586         NET_NEIGH_UCAST_SOLICIT=2,
 587         NET_NEIGH_APP_SOLICIT=3,
 588         NET_NEIGH_RETRANS_TIME=4,
 589         NET_NEIGH_REACHABLE_TIME=5,
 590         NET_NEIGH_DELAY_PROBE_TIME=6,
 591         NET_NEIGH_GC_STALE_TIME=7,
 592         NET_NEIGH_UNRES_QLEN=8,
 593         NET_NEIGH_PROXY_QLEN=9,
 594         NET_NEIGH_ANYCAST_DELAY=10,
 595         NET_NEIGH_PROXY_DELAY=11,
 596         NET_NEIGH_LOCKTIME=12,
 597         NET_NEIGH_GC_INTERVAL=13,
 598         NET_NEIGH_GC_THRESH1=14,
 599         NET_NEIGH_GC_THRESH2=15,
 600         NET_NEIGH_GC_THRESH3=16,
 601         NET_NEIGH_RETRANS_TIME_MS=17,
 602         NET_NEIGH_REACHABLE_TIME_MS=18,
 603         __NET_NEIGH_MAX
 604 };
 605
 606 /* /proc/sys/net/dccp */
 607 enum {
 608         NET_DCCP_DEFAULT=1,
 609 };
 610
 611 /* /proc/sys/net/ipx */
 612 enum {
 613         NET_IPX_PPROP_BROADCASTING=1,
 614         NET_IPX_FORWARDING=2
 615 };
 616
 617 /* /proc/sys/net/llc */
 618 enum {
 619         NET_LLC2=1,
 620         NET_LLC_STATION=2,
 621 };
 622
 623 /* /proc/sys/net/llc/llc2 */
 624 enum {
 625         NET_LLC2_TIMEOUT=1,
 626 };
 627
 628 /* /proc/sys/net/llc/station */
 629 enum {
 630         NET_LLC_STATION_ACK_TIMEOUT=1,
 631 };
 632
 633 /* /proc/sys/net/llc/llc2/timeout */
 634 enum {
 635         NET_LLC2_ACK_TIMEOUT=1,
 636         NET_LLC2_P_TIMEOUT=2,
 637         NET_LLC2_REJ_TIMEOUT=3,
 638         NET_LLC2_BUSY_TIMEOUT=4,
 639 };
 640
 641 /* /proc/sys/net/appletalk */
 642 enum {
 643         NET_ATALK_AARP_EXPIRY_TIME=1,
 644         NET_ATALK_AARP_TICK_TIME=2,
 645         NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
 646         NET_ATALK_AARP_RESOLVE_TIME=4
 647 };
 648
 649
 650 /* /proc/sys/net/netrom */
 651 enum {
 652         NET_NETROM_DEFAULT_PATH_QUALITY=1,
 653         NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
 654         NET_NETROM_NETWORK_TTL_INITIALISER=3,
 655         NET_NETROM_TRANSPORT_TIMEOUT=4,
 656         NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
 657         NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
 658         NET_NETROM_TRANSPORT_BUSY_DELAY=7,
 659         NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
 660         NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
 661         NET_NETROM_ROUTING_CONTROL=10,
 662         NET_NETROM_LINK_FAILS_COUNT=11,
 663         NET_NETROM_RESET=12
 664 };
 665
 666 /* /proc/sys/net/ax25 */
 667 enum {
 668         NET_AX25_IP_DEFAULT_MODE=1,
 669         NET_AX25_DEFAULT_MODE=2,
 670         NET_AX25_BACKOFF_TYPE=3,
 671         NET_AX25_CONNECT_MODE=4,
 672         NET_AX25_STANDARD_WINDOW=5,
 673         NET_AX25_EXTENDED_WINDOW=6,
 674         NET_AX25_T1_TIMEOUT=7,
 675         NET_AX25_T2_TIMEOUT=8,
 676         NET_AX25_T3_TIMEOUT=9,
 677         NET_AX25_IDLE_TIMEOUT=10,
 678         NET_AX25_N2=11,
 679         NET_AX25_PACLEN=12,
 680         NET_AX25_PROTOCOL=13,
 681         NET_AX25_DAMA_SLAVE_TIMEOUT=14
 682 };
 683
 684 /* /proc/sys/net/rose */
 685 enum {
 686         NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
 687         NET_ROSE_CALL_REQUEST_TIMEOUT=2,
 688         NET_ROSE_RESET_REQUEST_TIMEOUT=3,
 689         NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
 690         NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
 691         NET_ROSE_ROUTING_CONTROL=6,
 692         NET_ROSE_LINK_FAIL_TIMEOUT=7,
 693         NET_ROSE_MAX_VCS=8,
 694         NET_ROSE_WINDOW_SIZE=9,
 695         NET_ROSE_NO_ACTIVITY_TIMEOUT=10
 696 };
 697
 698 /* /proc/sys/net/x25 */
 699 enum {
 700         NET_X25_RESTART_REQUEST_TIMEOUT=1,
 701         NET_X25_CALL_REQUEST_TIMEOUT=2,
 702         NET_X25_RESET_REQUEST_TIMEOUT=3,
 703         NET_X25_CLEAR_REQUEST_TIMEOUT=4,
 704         NET_X25_ACK_HOLD_BACK_TIMEOUT=5,
 705         NET_X25_FORWARD=6
 706 };
 707
 708 /* /proc/sys/net/token-ring */
 709 enum
 710 {
 711         NET_TR_RIF_TIMEOUT=1
 712 };
 713
 714 /* /proc/sys/net/decnet/ */
 715 enum {
 716         NET_DECNET_NODE_TYPE = 1,
 717         NET_DECNET_NODE_ADDRESS = 2,
 718         NET_DECNET_NODE_NAME = 3,
 719         NET_DECNET_DEFAULT_DEVICE = 4,
 720         NET_DECNET_TIME_WAIT = 5,
 721         NET_DECNET_DN_COUNT = 6,
 722         NET_DECNET_DI_COUNT = 7,
 723         NET_DECNET_DR_COUNT = 8,
 724         NET_DECNET_DST_GC_INTERVAL = 9,
 725         NET_DECNET_CONF = 10,
 726         NET_DECNET_NO_FC_MAX_CWND = 11,
 727         NET_DECNET_MEM = 12,
 728         NET_DECNET_RMEM = 13,
 729         NET_DECNET_WMEM = 14,
 730         NET_DECNET_DEBUG_LEVEL = 255
 731 };
 732
 733 /* /proc/sys/net/decnet/conf/<dev> */
 734 enum {
 735         NET_DECNET_CONF_LOOPBACK = -2,
 736         NET_DECNET_CONF_DDCMP = -3,
 737         NET_DECNET_CONF_PPP = -4,
 738         NET_DECNET_CONF_X25 = -5,
 739         NET_DECNET_CONF_GRE = -6,
 740         NET_DECNET_CONF_ETHER = -7
 741
 742         /* ... and ifindex of devices */
 743 };
 744
 745 /* /proc/sys/net/decnet/conf/<dev>/ */
 746 enum {
 747         NET_DECNET_CONF_DEV_PRIORITY = 1,
 748         NET_DECNET_CONF_DEV_T1 = 2,
 749         NET_DECNET_CONF_DEV_T2 = 3,
 750         NET_DECNET_CONF_DEV_T3 = 4,
 751         NET_DECNET_CONF_DEV_FORWARDING = 5,
 752         NET_DECNET_CONF_DEV_BLKSIZE = 6,
 753         NET_DECNET_CONF_DEV_STATE = 7
 754 };
 755
 756 /* /proc/sys/net/sctp */
 757 enum {
 758         NET_SCTP_RTO_INITIAL = 1,
 759         NET_SCTP_RTO_MIN     = 2,
 760         NET_SCTP_RTO_MAX     = 3,
 761         NET_SCTP_RTO_ALPHA   = 4,
 762         NET_SCTP_RTO_BETA    = 5,
 763         NET_SCTP_VALID_COOKIE_LIFE       =  6,
 764         NET_SCTP_ASSOCIATION_MAX_RETRANS =  7,
 765         NET_SCTP_PATH_MAX_RETRANS        =  8,
 766         NET_SCTP_MAX_INIT_RETRANSMITS    =  9,
 767         NET_SCTP_HB_INTERVAL             = 10,
 768         NET_SCTP_PRESERVE_ENABLE         = 11,
 769         NET_SCTP_MAX_BURST               = 12,
 770         NET_SCTP_ADDIP_ENABLE            = 13,
 771         NET_SCTP_PRSCTP_ENABLE           = 14,
 772         NET_SCTP_SNDBUF_POLICY           = 15,
 773         NET_SCTP_SACK_TIMEOUT            = 16,
 774         NET_SCTP_RCVBUF_POLICY           = 17,
 775 };
 776
 777 /* /proc/sys/net/bridge */
 778 enum {
 779         NET_BRIDGE_NF_CALL_ARPTABLES = 1,
 780         NET_BRIDGE_NF_CALL_IPTABLES = 2,
 781         NET_BRIDGE_NF_CALL_IP6TABLES = 3,
 782         NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
 783 };
 784
 785 /* CTL_FS names: */
 786 enum
 787 {
 788         FS_NRINODE=1,   /* int:current number of allocated inodes */
 789         FS_STATINODE=2,
 790         FS_MAXINODE=3,  /* int:maximum number of inodes that can be allocated */
 791         FS_NRDQUOT=4,   /* int:current number of allocated dquots */
 792         FS_MAXDQUOT=5,  /* int:maximum number of dquots that can be allocated */
 793         FS_NRFILE=6,    /* int:current number of allocated filedescriptors */
 794         FS_MAXFILE=7,   /* int:maximum number of filedescriptors that can be allocated */
 795         FS_DENTRY=8,
 796         FS_NRSUPER=9,   /* int:current number of allocated super_blocks */
 797         FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
 798         FS_OVERFLOWUID=11,      /* int: overflow UID */
 799         FS_OVERFLOWGID=12,      /* int: overflow GID */
 800         FS_LEASES=13,   /* int: leases enabled */
 801         FS_DIR_NOTIFY=14,       /* int: directory notification enabled */
 802         FS_LEASE_TIME=15,       /* int: maximum time to wait for a lease break */
 803         FS_DQSTATS=16,  /* disc quota usage statistics and control */
 804         FS_XFS=17,      /* struct: control xfs parameters */
 805         FS_AIO_NR=18,   /* current system-wide number of aio requests */
 806         FS_AIO_MAX_NR=19,       /* system-wide maximum number of aio requests */
 807         FS_INOTIFY=20,  /* inotify submenu */
 808 };
 809
 810 /* /proc/sys/fs/quota/ */
 811 enum {
 812         FS_DQ_LOOKUPS = 1,
 813         FS_DQ_DROPS = 2,
 814         FS_DQ_READS = 3,
 815         FS_DQ_WRITES = 4,
 816         FS_DQ_CACHE_HITS = 5,
 817         FS_DQ_ALLOCATED = 6,
 818         FS_DQ_FREE = 7,
 819         FS_DQ_SYNCS = 8,
 820         FS_DQ_WARNINGS = 9,
 821 };
 822
 823 /* CTL_DEBUG names: */
 824
 825 /* CTL_DEV names: */
 826 enum {
 827         DEV_CDROM=1,
 828         DEV_HWMON=2,
 829         DEV_PARPORT=3,
 830         DEV_RAID=4,
 831         DEV_MAC_HID=5,
 832         DEV_SCSI=6,
 833         DEV_IPMI=7,
 834 };
 835
 836 /* /proc/sys/dev/cdrom */
 837 enum {
 838         DEV_CDROM_INFO=1,
 839         DEV_CDROM_AUTOCLOSE=2,
 840         DEV_CDROM_AUTOEJECT=3,
 841         DEV_CDROM_DEBUG=4,
 842         DEV_CDROM_LOCK=5,
 843         DEV_CDROM_CHECK_MEDIA=6
 844 };
 845
 846 /* /proc/sys/dev/parport */
 847 enum {
 848         DEV_PARPORT_DEFAULT=-3
 849 };
 850
 851 /* /proc/sys/dev/raid */
 852 enum {
 853         DEV_RAID_SPEED_LIMIT_MIN=1,
 854         DEV_RAID_SPEED_LIMIT_MAX=2
 855 };
 856
 857 /* /proc/sys/dev/parport/default */
 858 enum {
 859         DEV_PARPORT_DEFAULT_TIMESLICE=1,
 860         DEV_PARPORT_DEFAULT_SPINTIME=2
 861 };
 862
 863 /* /proc/sys/dev/parport/parport n */
 864 enum {
 865         DEV_PARPORT_SPINTIME=1,
 866         DEV_PARPORT_BASE_ADDR=2,
 867         DEV_PARPORT_IRQ=3,
 868         DEV_PARPORT_DMA=4,
 869         DEV_PARPORT_MODES=5,
 870         DEV_PARPORT_DEVICES=6,
 871         DEV_PARPORT_AUTOPROBE=16
 872 };
 873
 874 /* /proc/sys/dev/parport/parport n/devices/ */
 875 enum {
 876         DEV_PARPORT_DEVICES_ACTIVE=-3,
 877 };
 878
 879 /* /proc/sys/dev/parport/parport n/devices/device n */
 880 enum {
 881         DEV_PARPORT_DEVICE_TIMESLICE=1,
 882 };
 883
 884 /* /proc/sys/dev/mac_hid */
 885 enum {
 886         DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
 887         DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
 888         DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
 889         DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
 890         DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
 891         DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
 892 };
 893
 894 /* /proc/sys/dev/scsi */
 895 enum {
 896         DEV_SCSI_LOGGING_LEVEL=1,
 897 };
 898
 899 /* /proc/sys/dev/ipmi */
 900 enum {
 901         DEV_IPMI_POWEROFF_POWERCYCLE=1,
 902 };
 903
 904 /* /proc/sys/abi */
 905 enum
 906 {
 907         ABI_DEFHANDLER_COFF=1,  /* default handler for coff binaries */
 908         ABI_DEFHANDLER_ELF=2,   /* default handler for ELF binaries */
 909         ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
 910         ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
 911         ABI_TRACE=5,            /* tracing flags */
 912         ABI_FAKE_UTSNAME=6,     /* fake target utsname information */
 913 };
 914
 915 #ifdef __KERNEL__
 916 #include <linux/list.h>
 917
 918 extern void sysctl_init(void);
 919
 920 typedef struct ctl_table ctl_table;
 921
 922 typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,
 923                          void __user *oldval, size_t __user *oldlenp,
 924                          void __user *newval, size_t newlen);
 925
 926 typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
 927                           void __user *buffer, size_t *lenp, loff_t *ppos);
 928
 929 extern int proc_dostring(ctl_table *, int, struct file *,
 930                          void __user *, size_t *, loff_t *);
 931 extern int proc_dointvec(ctl_table *, int, struct file *,
 932                          void __user *, size_t *, loff_t *);
 933 extern int proc_dointvec_bset(ctl_table *, int, struct file *,
 934                               void __user *, size_t *, loff_t *);
 935 extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
 936                                 void __user *, size_t *, loff_t *);
 937 extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
 938                                  void __user *, size_t *, loff_t *);
 939 extern int proc_dointvec_userhz_jiffies(ctl_table *, int, struct file *,
 940                                         void __user *, size_t *, loff_t *);
 941 extern int proc_dointvec_ms_jiffies(ctl_table *, int, struct file *,
 942                                     void __user *, size_t *, loff_t *);
 943 extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
 944                                   void __user *, size_t *, loff_t *);
 945 extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
 946                                       struct file *, void __user *, size_t *, loff_t *);
 947
 948 extern int do_sysctl (int __user *name, int nlen,
 949                       void __user *oldval, size_t __user *oldlenp,
 950                       void __user *newval, size_t newlen);
 951
 952 extern int do_sysctl_strategy (ctl_table *table,
 953                                int __user *name, int nlen,
 954                                void __user *oldval, size_t __user *oldlenp,
 955                                void __user *newval, size_t newlen);
 956
 957 extern ctl_handler sysctl_string;
 958 extern ctl_handler sysctl_intvec;
 959 extern ctl_handler sysctl_jiffies;
 960 extern ctl_handler sysctl_ms_jiffies;
 961
 962
 963 /*
 964  * Register a set of sysctl names by calling register_sysctl_table
 965  * with an initialised array of ctl_table's.  An entry with zero
 966  * ctl_name and NULL procname terminates the table.  table->de will be
 967  * set up by the registration and need not be initialised in advance.
 968  *
 969  * sysctl names can be mirrored automatically under /proc/sys.  The
 970  * procname supplied controls /proc naming.
 971  *
 972  * The table's mode will be honoured both for sys_sysctl(2) and
 973  * proc-fs access.
 974  *
 975  * Leaf nodes in the sysctl tree will be represented by a single file
 976  * under /proc; non-leaf nodes will be represented by directories.  A
 977  * null procname disables /proc mirroring at this node.
 978  *
 979  * sysctl entries with a zero ctl_name will not be available through
 980  * the binary sysctl interface.
 981  *
 982  * sysctl(2) can automatically manage read and write requests through
 983  * the sysctl table.  The data and maxlen fields of the ctl_table
 984  * struct enable minimal validation of the values being written to be
 985  * performed, and the mode field allows minimal authentication.
 986  *
 987  * More sophisticated management can be enabled by the provision of a
 988  * strategy routine with the table entry.  This will be called before
 989  * any automatic read or write of the data is performed.
 990  *
 991  * The strategy routine may return:
 992  * <0: Error occurred (error is passed to user process)
 993  * 0:  OK - proceed with automatic read or write.
 994  * >0: OK - read or write has been done by the strategy routine, so
 995  *     return immediately.
 996  *
 997  * There must be a proc_handler routine for any terminal nodes
 998  * mirrored under /proc/sys (non-terminals are handled by a built-in
 999  * directory handler).  Several default handlers are available to
1000  * cover common cases.
1001  */
1002
1003 /* A sysctl table is an array of struct ctl_table: */
1004 struct ctl_table
1005 {
1006         int ctl_name;                   /* Binary ID */
1007         const char *procname;           /* Text ID for /proc/sys, or zero */
1008         void *data;
1009         int maxlen;
1010         mode_t mode;
1011         ctl_table *child;
1012         proc_handler *proc_handler;     /* Callback for text formatting */
1013         ctl_handler *strategy;          /* Callback function for all r/w */
1014         struct proc_dir_entry *de;      /* /proc control block */
1015         void *extra1;
1016         void *extra2;
1017 };
1018
1019 /* struct ctl_table_header is used to maintain dynamic lists of
1020    ctl_table trees. */
1021 struct ctl_table_header
1022 {
1023         ctl_table *ctl_table;
1024         struct list_head ctl_entry;
1025         int used;
1026         struct completion *unregistering;
1027 };
1028
1029 struct ctl_table_header * register_sysctl_table(ctl_table * table,
1030                                                 int insert_at_head);
1031 void unregister_sysctl_table(struct ctl_table_header * table);
1032
1033 #else /* __KERNEL__ */
1034
1035 #endif /* __KERNEL__ */
1036
1037 #endif /* _LINUX_SYSCTL_H */