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