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  **  The values in this file are exported to user space via
  10  **  the sysctl() binary interface.  However this interface
  11  **  is unstable and deprecated and will be removed in the future.
  12  **  For a stable interface use /proc/sys.
  13  **
  14  ****************************************************************
  15  ****************************************************************
  16  */
  17
  18 #ifndef _LINUX_SYSCTL_H
  19 #define _LINUX_SYSCTL_H
  20
  21 #include <linux/kernel.h>
  22 #include <linux/types.h>
  23 #include <linux/list.h>
  24 #include <linux/compiler.h>
  25
  26 struct file;
  27
  28 #define CTL_MAXNAME 10          /* how many path components do we allow in a
  29                                    call to sysctl?   In other words, what is
  30                                    the largest acceptable value for the nlen
  31                                    member of a struct __sysctl_args to have? */
  32
  33 struct __sysctl_args {
  34         int __user *name;
  35         int nlen;
  36         void __user *oldval;
  37         size_t __user *oldlenp;
  38         void __user *newval;
  39         size_t newlen;
  40         unsigned long __unused[4];
  41 };
  42
  43 /* Define sysctl names first */
  44
  45 /* Top-level names: */
  46
  47 /* For internal pattern-matching use only: */
  48 #ifdef __KERNEL__
  49 #define CTL_ANY         -1      /* Matches any name */
  50 #define CTL_NONE        0
  51 #endif
  52
  53 enum
  54 {
  55         CTL_KERN=1,             /* General kernel info and control */
  56         CTL_VM=2,               /* VM management */
  57         CTL_NET=3,              /* Networking */
  58         CTL_PROC=4,             /* Process info */
  59         CTL_FS=5,               /* Filesystems */
  60         CTL_DEBUG=6,            /* Debugging */
  61         CTL_DEV=7,              /* Devices */
  62         CTL_BUS=8,              /* Busses */
  63         CTL_ABI=9,              /* Binary emulation */
  64         CTL_CPU=10              /* CPU stuff (speed scaling, etc) */
  65 };
  66
  67 /* CTL_BUS names: */
  68 enum
  69 {
  70         CTL_BUS_ISA=1           /* ISA */
  71 };
  72
  73 /* CTL_KERN names: */
  74 enum
  75 {
  76         KERN_OSTYPE=1,          /* string: system version */
  77         KERN_OSRELEASE=2,       /* string: system release */
  78         KERN_OSREV=3,           /* int: system revision */
  79         KERN_VERSION=4,         /* string: compile time info */
  80         KERN_SECUREMASK=5,      /* struct: maximum rights mask */
  81         KERN_PROF=6,            /* table: profiling information */
  82         KERN_NODENAME=7,
  83         KERN_DOMAINNAME=8,
  84
  85         KERN_CAP_BSET=14,       /* int: capability bounding set */
  86         KERN_PANIC=15,          /* int: panic timeout */
  87         KERN_REALROOTDEV=16,    /* real root device to mount after initrd */
  88
  89         KERN_SPARC_REBOOT=21,   /* reboot command on Sparc */
  90         KERN_CTLALTDEL=22,      /* int: allow ctl-alt-del to reboot */
  91         KERN_PRINTK=23,         /* struct: control printk logging parameters */
  92         KERN_NAMETRANS=24,      /* Name translation */
  93         KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */
  94         KERN_PPC_ZEROPAGED=26,  /* turn idle page zeroing on/off on PPC */
  95         KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */
  96         KERN_MODPROBE=28,
  97         KERN_SG_BIG_BUFF=29,
  98         KERN_ACCT=30,           /* BSD process accounting parameters */
  99         KERN_PPC_L2CR=31,       /* l2cr register on PPC */
 100
 101         KERN_RTSIGNR=32,        /* Number of rt sigs queued */
 102         KERN_RTSIGMAX=33,       /* Max queuable */
 103
 104         KERN_SHMMAX=34,         /* long: Maximum shared memory segment */
 105         KERN_MSGMAX=35,         /* int: Maximum size of a messege */
 106         KERN_MSGMNB=36,         /* int: Maximum message queue size */
 107         KERN_MSGPOOL=37,        /* int: Maximum system message pool size */
 108         KERN_SYSRQ=38,          /* int: Sysreq enable */
 109         KERN_MAX_THREADS=39,    /* int: Maximum nr of threads in the system */
 110         KERN_RANDOM=40,         /* Random driver */
 111         KERN_SHMALL=41,         /* int: Maximum size of shared memory */
 112         KERN_MSGMNI=42,         /* int: msg queue identifiers */
 113         KERN_SEM=43,            /* struct: sysv semaphore limits */
 114         KERN_SPARC_STOP_A=44,   /* int: Sparc Stop-A enable */
 115         KERN_SHMMNI=45,         /* int: shm array identifiers */
 116         KERN_OVERFLOWUID=46,    /* int: overflow UID */
 117         KERN_OVERFLOWGID=47,    /* int: overflow GID */
 118         KERN_SHMPATH=48,        /* string: path to shm fs */
 119         KERN_HOTPLUG=49,        /* string: path to hotplug policy agent */
 120         KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
 121         KERN_S390_USER_DEBUG_LOGGING=51,  /* int: dumps of user faults */
 122         KERN_CORE_USES_PID=52,          /* int: use core or core.%pid */
 123         KERN_TAINTED=53,        /* int: various kernel tainted flags */
 124         KERN_CADPID=54,         /* int: PID of the process to notify on CAD */
 125         KERN_PIDMAX=55,         /* int: PID # limit */
 126         KERN_CORE_PATTERN=56,   /* string: pattern for core-file names */
 127         KERN_PANIC_ON_OOPS=57,  /* int: whether we will panic on an oops */
 128         KERN_HPPA_PWRSW=58,     /* int: hppa soft-power enable */
 129         KERN_HPPA_UNALIGNED=59, /* int: hppa unaligned-trap enable */
 130         KERN_PRINTK_RATELIMIT=60, /* int: tune printk ratelimiting */
 131         KERN_PRINTK_RATELIMIT_BURST=61, /* int: tune printk ratelimiting */
 132         KERN_PTY=62,            /* dir: pty driver */
 133         KERN_NGROUPS_MAX=63,    /* int: NGROUPS_MAX */
 134         KERN_SPARC_SCONS_PWROFF=64, /* int: serial console power-off halt */
 135         KERN_HZ_TIMER=65,       /* int: hz timer on or off */
 136         KERN_UNKNOWN_NMI_PANIC=66, /* int: unknown nmi panic flag */
 137         KERN_SETUID_DUMPABLE=67, /* int: behaviour of dumps for setuid core */
 138         KERN_VSHELPER=68,       /* string: path to vshelper policy agent */
 139         KERN_DUMP=69,           /* dir: dump parameters */
 140 };
 141
 142
 143 /* CTL_VM names: */
 144 enum
 145 {
 146         VM_UNUSED1=1,           /* was: struct: Set vm swapping control */
 147         VM_UNUSED2=2,           /* was; int: Linear or sqrt() swapout for hogs */
 148         VM_UNUSED3=3,           /* was: struct: Set free page thresholds */
 149         VM_UNUSED4=4,           /* Spare */
 150         VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
 151         VM_UNUSED5=6,           /* was: struct: Set buffer memory thresholds */
 152         VM_UNUSED7=7,           /* was: struct: Set cache memory thresholds */
 153         VM_UNUSED8=8,           /* was: struct: Control kswapd behaviour */
 154         VM_UNUSED9=9,           /* was: struct: Set page table cache parameters */
 155         VM_PAGE_CLUSTER=10,     /* int: set number of pages to swap together */
 156         VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
 157         VM_DIRTY_RATIO=12,      /* dirty_ratio */
 158         VM_DIRTY_WB_CS=13,      /* dirty_writeback_centisecs */
 159         VM_DIRTY_EXPIRE_CS=14,  /* dirty_expire_centisecs */
 160         VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
 161         VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
 162         VM_PAGEBUF=17,          /* struct: Control pagebuf parameters */
 163         VM_HUGETLB_PAGES=18,    /* int: Number of available Huge Pages */
 164         VM_SWAPPINESS=19,       /* Tendency to steal mapped memory */
 165         VM_LOWER_ZONE_PROTECTION=20,/* Amount of protection of lower zones */
 166         VM_MIN_FREE_KBYTES=21,  /* Minimum free kilobytes to maintain */
 167         VM_MAX_MAP_COUNT=22,    /* int: Maximum number of mmaps/address-space */
 168         VM_LAPTOP_MODE=23,      /* vm laptop mode */
 169         VM_BLOCK_DUMP=24,       /* block dump mode */
 170         VM_HUGETLB_GROUP=25,    /* permitted hugetlb group */
 171         VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
 172         VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
 173         VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
 174 };
 175
 176
 177 /* CTL_NET names: */
 178 enum
 179 {
 180         NET_CORE=1,
 181         NET_ETHER=2,
 182         NET_802=3,
 183         NET_UNIX=4,
 184         NET_IPV4=5,
 185         NET_IPX=6,
 186         NET_ATALK=7,
 187         NET_NETROM=8,
 188         NET_AX25=9,
 189         NET_BRIDGE=10,
 190         NET_ROSE=11,
 191         NET_IPV6=12,
 192         NET_X25=13,
 193         NET_TR=14,
 194         NET_DECNET=15,
 195         NET_ECONET=16,
 196         NET_SCTP=17,
 197         NET_TUX=18,
 198 };
 199
 200 /* /proc/sys/kernel/random */
 201 enum
 202 {
 203         RANDOM_POOLSIZE=1,
 204         RANDOM_ENTROPY_COUNT=2,
 205         RANDOM_READ_THRESH=3,
 206         RANDOM_WRITE_THRESH=4,
 207         RANDOM_BOOT_ID=5,
 208         RANDOM_UUID=6
 209 };
 210
 211 /* /proc/sys/kernel/pty */
 212 enum
 213 {
 214         PTY_MAX=1,
 215         PTY_NR=2
 216 };
 217
 218 /* /proc/sys/bus/isa */
 219 enum
 220 {
 221         BUS_ISA_MEM_BASE=1,
 222         BUS_ISA_PORT_BASE=2,
 223         BUS_ISA_PORT_SHIFT=3
 224 };
 225
 226 /* /proc/sys/net/core */
 227 enum
 228 {
 229         NET_CORE_WMEM_MAX=1,
 230         NET_CORE_RMEM_MAX=2,
 231         NET_CORE_WMEM_DEFAULT=3,
 232         NET_CORE_RMEM_DEFAULT=4,
 233 /* was  NET_CORE_DESTROY_DELAY */
 234         NET_CORE_MAX_BACKLOG=6,
 235         NET_CORE_FASTROUTE=7,
 236         NET_CORE_MSG_COST=8,
 237         NET_CORE_MSG_BURST=9,
 238         NET_CORE_OPTMEM_MAX=10,
 239         NET_CORE_HOT_LIST_LENGTH=11,
 240         NET_CORE_DIVERT_VERSION=12,
 241         NET_CORE_NO_CONG_THRESH=13,
 242         NET_CORE_NO_CONG=14,
 243         NET_CORE_LO_CONG=15,
 244         NET_CORE_MOD_CONG=16,
 245         NET_CORE_DEV_WEIGHT=17,
 246         NET_CORE_SOMAXCONN=18,
 247 };
 248
 249 /* /proc/sys/net/ethernet */
 250
 251 /* /proc/sys/net/802 */
 252
 253 /* /proc/sys/net/unix */
 254
 255 enum
 256 {
 257         NET_UNIX_DESTROY_DELAY=1,
 258         NET_UNIX_DELETE_DELAY=2,
 259         NET_UNIX_MAX_DGRAM_QLEN=3,
 260 };
 261
 262 /* /proc/sys/net/ipv4 */
 263 enum
 264 {
 265         /* v2.0 compatibile variables */
 266         NET_IPV4_FORWARD=8,
 267         NET_IPV4_DYNADDR=9,
 268
 269         NET_IPV4_CONF=16,
 270         NET_IPV4_NEIGH=17,
 271         NET_IPV4_ROUTE=18,
 272         NET_IPV4_FIB_HASH=19,
 273         NET_IPV4_NETFILTER=20,
 274
 275         NET_IPV4_TCP_TIMESTAMPS=33,
 276         NET_IPV4_TCP_WINDOW_SCALING=34,
 277         NET_IPV4_TCP_SACK=35,
 278         NET_IPV4_TCP_RETRANS_COLLAPSE=36,
 279         NET_IPV4_DEFAULT_TTL=37,
 280         NET_IPV4_AUTOCONFIG=38,
 281         NET_IPV4_NO_PMTU_DISC=39,
 282         NET_IPV4_TCP_SYN_RETRIES=40,
 283         NET_IPV4_IPFRAG_HIGH_THRESH=41,
 284         NET_IPV4_IPFRAG_LOW_THRESH=42,
 285         NET_IPV4_IPFRAG_TIME=43,
 286         NET_IPV4_TCP_MAX_KA_PROBES=44,
 287         NET_IPV4_TCP_KEEPALIVE_TIME=45,
 288         NET_IPV4_TCP_KEEPALIVE_PROBES=46,
 289         NET_IPV4_TCP_RETRIES1=47,
 290         NET_IPV4_TCP_RETRIES2=48,
 291         NET_IPV4_TCP_FIN_TIMEOUT=49,
 292         NET_IPV4_IP_MASQ_DEBUG=50,
 293         NET_TCP_SYNCOOKIES=51,
 294         NET_TCP_STDURG=52,
 295         NET_TCP_RFC1337=53,
 296         NET_TCP_SYN_TAILDROP=54,
 297         NET_TCP_MAX_SYN_BACKLOG=55,
 298         NET_IPV4_LOCAL_PORT_RANGE=56,
 299         NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
 300         NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
 301         NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
 302         NET_IPV4_ICMP_DESTUNREACH_RATE=60,
 303         NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
 304         NET_IPV4_ICMP_PARAMPROB_RATE=62,
 305         NET_IPV4_ICMP_ECHOREPLY_RATE=63,
 306         NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
 307         NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
 308         NET_TCP_TW_RECYCLE=66,
 309         NET_IPV4_ALWAYS_DEFRAG=67,
 310         NET_IPV4_TCP_KEEPALIVE_INTVL=68,
 311         NET_IPV4_INET_PEER_THRESHOLD=69,
 312         NET_IPV4_INET_PEER_MINTTL=70,
 313         NET_IPV4_INET_PEER_MAXTTL=71,
 314         NET_IPV4_INET_PEER_GC_MINTIME=72,
 315         NET_IPV4_INET_PEER_GC_MAXTIME=73,
 316         NET_TCP_ORPHAN_RETRIES=74,
 317         NET_TCP_ABORT_ON_OVERFLOW=75,
 318         NET_TCP_SYNACK_RETRIES=76,
 319         NET_TCP_MAX_ORPHANS=77,
 320         NET_TCP_MAX_TW_BUCKETS=78,
 321         NET_TCP_FACK=79,
 322         NET_TCP_REORDERING=80,
 323         NET_TCP_ECN=81,
 324         NET_TCP_DSACK=82,
 325         NET_TCP_MEM=83,
 326         NET_TCP_WMEM=84,
 327         NET_TCP_RMEM=85,
 328         NET_TCP_APP_WIN=86,
 329         NET_TCP_ADV_WIN_SCALE=87,
 330         NET_IPV4_NONLOCAL_BIND=88,
 331         NET_IPV4_ICMP_RATELIMIT=89,
 332         NET_IPV4_ICMP_RATEMASK=90,
 333         NET_TCP_TW_REUSE=91,
 334         NET_TCP_FRTO=92,
 335         NET_TCP_LOW_LATENCY=93,
 336         NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
 337         NET_TCP_WESTWOOD=95,
 338         NET_IPV4_IGMP_MAX_MSF=96,
 339         NET_TCP_NO_METRICS_SAVE=97,
 340         NET_TCP_VEGAS=98,
 341         NET_TCP_VEGAS_ALPHA=99,
 342         NET_TCP_VEGAS_BETA=100,
 343         NET_TCP_VEGAS_GAMMA=101,
 344         NET_TCP_BIC=102,
 345         NET_TCP_BIC_FAST_CONVERGENCE=103,
 346         NET_TCP_BIC_LOW_WINDOW=104,
 347         NET_TCP_DEFAULT_WIN_SCALE=105,
 348         NET_TCP_MODERATE_RCVBUF=106,
 349         NET_TCP_TSO_WIN_DIVISOR=107,
 350 #ifdef CONFIG_ICMP_IPOD
 351         NET_IPV4_ICMP_IPOD_VERSION,
 352         NET_IPV4_ICMP_IPOD_ENABLED,
 353         NET_IPV4_ICMP_IPOD_HOST,
 354         NET_IPV4_ICMP_IPOD_MASK,
 355         NET_IPV4_ICMP_IPOD_KEY,
 356 #endif
 357 };
 358
 359 enum {
 360         NET_IPV4_ROUTE_FLUSH=1,
 361         NET_IPV4_ROUTE_MIN_DELAY=2,
 362         NET_IPV4_ROUTE_MAX_DELAY=3,
 363         NET_IPV4_ROUTE_GC_THRESH=4,
 364         NET_IPV4_ROUTE_MAX_SIZE=5,
 365         NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
 366         NET_IPV4_ROUTE_GC_TIMEOUT=7,
 367         NET_IPV4_ROUTE_GC_INTERVAL=8,
 368         NET_IPV4_ROUTE_REDIRECT_LOAD=9,
 369         NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
 370         NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
 371         NET_IPV4_ROUTE_ERROR_COST=12,
 372         NET_IPV4_ROUTE_ERROR_BURST=13,
 373         NET_IPV4_ROUTE_GC_ELASTICITY=14,
 374         NET_IPV4_ROUTE_MTU_EXPIRES=15,
 375         NET_IPV4_ROUTE_MIN_PMTU=16,
 376         NET_IPV4_ROUTE_MIN_ADVMSS=17,
 377         NET_IPV4_ROUTE_SECRET_INTERVAL=18,
 378 };
 379
 380 enum
 381 {
 382         NET_PROTO_CONF_ALL=-2,
 383         NET_PROTO_CONF_DEFAULT=-3
 384
 385         /* And device ifindices ... */
 386 };
 387
 388 enum
 389 {
 390         NET_IPV4_CONF_FORWARDING=1,
 391         NET_IPV4_CONF_MC_FORWARDING=2,
 392         NET_IPV4_CONF_PROXY_ARP=3,
 393         NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
 394         NET_IPV4_CONF_SECURE_REDIRECTS=5,
 395         NET_IPV4_CONF_SEND_REDIRECTS=6,
 396         NET_IPV4_CONF_SHARED_MEDIA=7,
 397         NET_IPV4_CONF_RP_FILTER=8,
 398         NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
 399         NET_IPV4_CONF_BOOTP_RELAY=10,
 400         NET_IPV4_CONF_LOG_MARTIANS=11,
 401         NET_IPV4_CONF_TAG=12,
 402         NET_IPV4_CONF_ARPFILTER=13,
 403         NET_IPV4_CONF_MEDIUM_ID=14,
 404         NET_IPV4_CONF_NOXFRM=15,
 405         NET_IPV4_CONF_NOPOLICY=16,
 406         NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
 407         NET_IPV4_CONF_ARP_ANNOUNCE=18,
 408         NET_IPV4_CONF_ARP_IGNORE=19,
 409 };
 410
 411 /* /proc/sys/net/ipv4/netfilter */
 412 enum
 413 {
 414         NET_IPV4_NF_CONNTRACK_MAX=1,
 415         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
 416         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
 417         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
 418         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
 419         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
 420         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
 421         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
 422         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
 423         NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
 424         NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
 425         NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
 426         NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
 427         NET_IPV4_NF_CONNTRACK_BUCKETS=14,
 428         NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
 429         NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
 430         NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
 431         NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
 432         NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
 433         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
 434         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
 435         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
 436         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
 437         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
 438         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
 439         NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
 440         NET_IPV4_NF_CONNTRACK_COUNT=27,
 441 };
 442
 443 /* /proc/sys/net/ipv6 */
 444 enum {
 445         NET_IPV6_CONF=16,
 446         NET_IPV6_NEIGH=17,
 447         NET_IPV6_ROUTE=18,
 448         NET_IPV6_ICMP=19,
 449         NET_IPV6_BINDV6ONLY=20,
 450         NET_IPV6_IP6FRAG_HIGH_THRESH=21,
 451         NET_IPV6_IP6FRAG_LOW_THRESH=22,
 452         NET_IPV6_IP6FRAG_TIME=23,
 453         NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
 454         NET_IPV6_MLD_MAX_MSF=25,
 455 };
 456
 457 enum {
 458         NET_IPV6_ROUTE_FLUSH=1,
 459         NET_IPV6_ROUTE_GC_THRESH=2,
 460         NET_IPV6_ROUTE_MAX_SIZE=3,
 461         NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
 462         NET_IPV6_ROUTE_GC_TIMEOUT=5,
 463         NET_IPV6_ROUTE_GC_INTERVAL=6,
 464         NET_IPV6_ROUTE_GC_ELASTICITY=7,
 465         NET_IPV6_ROUTE_MTU_EXPIRES=8,
 466         NET_IPV6_ROUTE_MIN_ADVMSS=9
 467 };
 468
 469 enum {
 470         NET_IPV6_FORWARDING=1,
 471         NET_IPV6_HOP_LIMIT=2,
 472         NET_IPV6_MTU=3,
 473         NET_IPV6_ACCEPT_RA=4,
 474         NET_IPV6_ACCEPT_REDIRECTS=5,
 475         NET_IPV6_AUTOCONF=6,
 476         NET_IPV6_DAD_TRANSMITS=7,
 477         NET_IPV6_RTR_SOLICITS=8,
 478         NET_IPV6_RTR_SOLICIT_INTERVAL=9,
 479         NET_IPV6_RTR_SOLICIT_DELAY=10,
 480         NET_IPV6_USE_TEMPADDR=11,
 481         NET_IPV6_TEMP_VALID_LFT=12,
 482         NET_IPV6_TEMP_PREFERED_LFT=13,
 483         NET_IPV6_REGEN_MAX_RETRY=14,
 484         NET_IPV6_MAX_DESYNC_FACTOR=15,
 485         NET_IPV6_MAX_ADDRESSES=16,
 486         NET_IPV6_FORCE_MLD_VERSION=17
 487 };
 488
 489 /* /proc/sys/net/ipv6/icmp */
 490 enum {
 491         NET_IPV6_ICMP_RATELIMIT=1
 492 };
 493
 494 /* /proc/sys/net/<protocol>/neigh/<dev> */
 495 enum {
 496         NET_NEIGH_MCAST_SOLICIT=1,
 497         NET_NEIGH_UCAST_SOLICIT=2,
 498         NET_NEIGH_APP_SOLICIT=3,
 499         NET_NEIGH_RETRANS_TIME=4,
 500         NET_NEIGH_REACHABLE_TIME=5,
 501         NET_NEIGH_DELAY_PROBE_TIME=6,
 502         NET_NEIGH_GC_STALE_TIME=7,
 503         NET_NEIGH_UNRES_QLEN=8,
 504         NET_NEIGH_PROXY_QLEN=9,
 505         NET_NEIGH_ANYCAST_DELAY=10,
 506         NET_NEIGH_PROXY_DELAY=11,
 507         NET_NEIGH_LOCKTIME=12,
 508         NET_NEIGH_GC_INTERVAL=13,
 509         NET_NEIGH_GC_THRESH1=14,
 510         NET_NEIGH_GC_THRESH2=15,
 511         NET_NEIGH_GC_THRESH3=16
 512 };
 513
 514 /* /proc/sys/net/ipx */
 515 enum {
 516         NET_IPX_PPROP_BROADCASTING=1,
 517         NET_IPX_FORWARDING=2
 518 };
 519
 520
 521 /* /proc/sys/net/appletalk */
 522 enum {
 523         NET_ATALK_AARP_EXPIRY_TIME=1,
 524         NET_ATALK_AARP_TICK_TIME=2,
 525         NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
 526         NET_ATALK_AARP_RESOLVE_TIME=4
 527 };
 528
 529
 530 /* /proc/sys/net/netrom */
 531 enum {
 532         NET_NETROM_DEFAULT_PATH_QUALITY=1,
 533         NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
 534         NET_NETROM_NETWORK_TTL_INITIALISER=3,
 535         NET_NETROM_TRANSPORT_TIMEOUT=4,
 536         NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
 537         NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
 538         NET_NETROM_TRANSPORT_BUSY_DELAY=7,
 539         NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
 540         NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
 541         NET_NETROM_ROUTING_CONTROL=10,
 542         NET_NETROM_LINK_FAILS_COUNT=11
 543 };
 544
 545 /* /proc/sys/net/ax25 */
 546 enum {
 547         NET_AX25_IP_DEFAULT_MODE=1,
 548         NET_AX25_DEFAULT_MODE=2,
 549         NET_AX25_BACKOFF_TYPE=3,
 550         NET_AX25_CONNECT_MODE=4,
 551         NET_AX25_STANDARD_WINDOW=5,
 552         NET_AX25_EXTENDED_WINDOW=6,
 553         NET_AX25_T1_TIMEOUT=7,
 554         NET_AX25_T2_TIMEOUT=8,
 555         NET_AX25_T3_TIMEOUT=9,
 556         NET_AX25_IDLE_TIMEOUT=10,
 557         NET_AX25_N2=11,
 558         NET_AX25_PACLEN=12,
 559         NET_AX25_PROTOCOL=13,
 560         NET_AX25_DAMA_SLAVE_TIMEOUT=14
 561 };
 562
 563 /* /proc/sys/net/rose */
 564 enum {
 565         NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
 566         NET_ROSE_CALL_REQUEST_TIMEOUT=2,
 567         NET_ROSE_RESET_REQUEST_TIMEOUT=3,
 568         NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
 569         NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
 570         NET_ROSE_ROUTING_CONTROL=6,
 571         NET_ROSE_LINK_FAIL_TIMEOUT=7,
 572         NET_ROSE_MAX_VCS=8,
 573         NET_ROSE_WINDOW_SIZE=9,
 574         NET_ROSE_NO_ACTIVITY_TIMEOUT=10
 575 };
 576
 577 /* /proc/sys/net/x25 */
 578 enum {
 579         NET_X25_RESTART_REQUEST_TIMEOUT=1,
 580         NET_X25_CALL_REQUEST_TIMEOUT=2,
 581         NET_X25_RESET_REQUEST_TIMEOUT=3,
 582         NET_X25_CLEAR_REQUEST_TIMEOUT=4,
 583         NET_X25_ACK_HOLD_BACK_TIMEOUT=5
 584 };
 585
 586 /* /proc/sys/net/token-ring */
 587 enum
 588 {
 589         NET_TR_RIF_TIMEOUT=1
 590 };
 591
 592 /* /proc/sys/net/decnet/ */
 593 enum {
 594         NET_DECNET_NODE_TYPE = 1,
 595         NET_DECNET_NODE_ADDRESS = 2,
 596         NET_DECNET_NODE_NAME = 3,
 597         NET_DECNET_DEFAULT_DEVICE = 4,
 598         NET_DECNET_TIME_WAIT = 5,
 599         NET_DECNET_DN_COUNT = 6,
 600         NET_DECNET_DI_COUNT = 7,
 601         NET_DECNET_DR_COUNT = 8,
 602         NET_DECNET_DST_GC_INTERVAL = 9,
 603         NET_DECNET_CONF = 10,
 604         NET_DECNET_NO_FC_MAX_CWND = 11,
 605         NET_DECNET_DEBUG_LEVEL = 255
 606 };
 607
 608 /* /proc/sys/net/decnet/conf/<dev> */
 609 enum {
 610         NET_DECNET_CONF_LOOPBACK = -2,
 611         NET_DECNET_CONF_DDCMP = -3,
 612         NET_DECNET_CONF_PPP = -4,
 613         NET_DECNET_CONF_X25 = -5,
 614         NET_DECNET_CONF_GRE = -6,
 615         NET_DECNET_CONF_ETHER = -7
 616
 617         /* ... and ifindex of devices */
 618 };
 619
 620 /* /proc/sys/net/decnet/conf/<dev>/ */
 621 enum {
 622         NET_DECNET_CONF_DEV_PRIORITY = 1,
 623         NET_DECNET_CONF_DEV_T1 = 2,
 624         NET_DECNET_CONF_DEV_T2 = 3,
 625         NET_DECNET_CONF_DEV_T3 = 4,
 626         NET_DECNET_CONF_DEV_FORWARDING = 5,
 627         NET_DECNET_CONF_DEV_BLKSIZE = 6,
 628         NET_DECNET_CONF_DEV_STATE = 7
 629 };
 630
 631 /* /proc/sys/net/sctp */
 632 enum {
 633         NET_SCTP_RTO_INITIAL = 1,
 634         NET_SCTP_RTO_MIN     = 2,
 635         NET_SCTP_RTO_MAX     = 3,
 636         NET_SCTP_RTO_ALPHA   = 4,
 637         NET_SCTP_RTO_BETA    = 5,
 638         NET_SCTP_VALID_COOKIE_LIFE       =  6,
 639         NET_SCTP_ASSOCIATION_MAX_RETRANS =  7,
 640         NET_SCTP_PATH_MAX_RETRANS        =  8,
 641         NET_SCTP_MAX_INIT_RETRANSMITS    =  9,
 642         NET_SCTP_HB_INTERVAL             = 10,
 643         NET_SCTP_PRESERVE_ENABLE         = 11,
 644         NET_SCTP_MAX_BURST               = 12,
 645         NET_SCTP_ADDIP_ENABLE            = 13,
 646         NET_SCTP_PRSCTP_ENABLE           = 14,
 647 };
 648
 649 /* /proc/sys/net/bridge */
 650 enum {
 651         NET_BRIDGE_NF_CALL_ARPTABLES = 1,
 652         NET_BRIDGE_NF_CALL_IPTABLES = 2,
 653         NET_BRIDGE_NF_CALL_IP6TABLES = 3,
 654         NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
 655 };
 656
 657 /* /proc/sys/net/tux/ */
 658 enum {
 659         NET_TUX_DOCROOT                 =  1,
 660         NET_TUX_LOGFILE                 =  2,
 661         NET_TUX_EXTCGI                  =  3,
 662         NET_TUX_STOP                    =  4,
 663         NET_TUX_CLIENTPORT              =  5,
 664         NET_TUX_LOGGING                 =  6,
 665         NET_TUX_SERVERPORT              =  7,
 666         NET_TUX_THREADS                 =  8,
 667         NET_TUX_KEEPALIVE_TIMEOUT       =  9,
 668         NET_TUX_MAX_KEEPALIVE_BW        = 10,
 669         NET_TUX_DEFER_ACCEPT            = 11,
 670         NET_TUX_MAX_FREE_REQUESTS       = 12,
 671         NET_TUX_MAX_CONNECT             = 13,
 672         NET_TUX_MAX_BACKLOG             = 14,
 673         NET_TUX_MODE_FORBIDDEN          = 15,
 674         NET_TUX_MODE_ALLOWED            = 16,
 675         NET_TUX_MODE_USERSPACE          = 17,
 676         NET_TUX_MODE_CGI                = 18,
 677         NET_TUX_CGI_UID                 = 19,
 678         NET_TUX_CGI_GID                 = 20,
 679         NET_TUX_CGIROOT                 = 21,
 680         NET_TUX_LOGENTRY_ALIGN_ORDER    = 22,
 681         NET_TUX_NONAGLE                 = 23,
 682         NET_TUX_ACK_PINGPONG            = 24,
 683         NET_TUX_PUSH_ALL                = 25,
 684         NET_TUX_ZEROCOPY_PARSE          = 26,
 685         NET_CONFIG_TUX_DEBUG_BLOCKING   = 27,
 686         NET_TUX_PAGE_AGE_START          = 28,
 687         NET_TUX_PAGE_AGE_ADV            = 29,
 688         NET_TUX_PAGE_AGE_MAX            = 30,
 689         NET_TUX_VIRTUAL_SERVER          = 31,
 690         NET_TUX_MAX_OBJECT_SIZE         = 32,
 691         NET_TUX_COMPRESSION             = 33,
 692         NET_TUX_NOID                    = 34,
 693         NET_TUX_CGI_INHERIT_CPU         = 35,
 694         NET_TUX_CGI_CPU_MASK            = 36,
 695         NET_TUX_ZEROCOPY_HEADER         = 37,
 696         NET_TUX_ZEROCOPY_SENDFILE       = 38,
 697         NET_TUX_ALL_USERSPACE           = 39,
 698         NET_TUX_REDIRECT_LOGGING        = 40,
 699         NET_TUX_REFERER_LOGGING         = 41,
 700         NET_TUX_MAX_HEADER_LEN          = 42,
 701         NET_TUX_404_PAGE                = 43,
 702         NET_TUX_MAX_KEEPALIVES          = 44,
 703         NET_TUX_IGNORE_QUERY            = 45,
 704 };
 705
 706 /* CTL_PROC names: */
 707
 708 /* CTL_FS names: */
 709 enum
 710 {
 711         FS_NRINODE=1,   /* int:current number of allocated inodes */
 712         FS_STATINODE=2,
 713         FS_MAXINODE=3,  /* int:maximum number of inodes that can be allocated */
 714         FS_NRDQUOT=4,   /* int:current number of allocated dquots */
 715         FS_MAXDQUOT=5,  /* int:maximum number of dquots that can be allocated */
 716         FS_NRFILE=6,    /* int:current number of allocated filedescriptors */
 717         FS_MAXFILE=7,   /* int:maximum number of filedescriptors that can be allocated */
 718         FS_DENTRY=8,
 719         FS_NRSUPER=9,   /* int:current number of allocated super_blocks */
 720         FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
 721         FS_OVERFLOWUID=11,      /* int: overflow UID */
 722         FS_OVERFLOWGID=12,      /* int: overflow GID */
 723         FS_LEASES=13,   /* int: leases enabled */
 724         FS_DIR_NOTIFY=14,       /* int: directory notification enabled */
 725         FS_LEASE_TIME=15,       /* int: maximum time to wait for a lease break */
 726         FS_DQSTATS=16,  /* disc quota usage statistics */
 727         FS_XFS=17,      /* struct: control xfs parameters */
 728         FS_AIO_NR=18,   /* current system-wide number of aio requests */
 729         FS_AIO_MAX_NR=19,       /* system-wide maximum number of aio requests */
 730 };
 731
 732 /* /proc/sys/fs/quota/ */
 733 enum {
 734         FS_DQ_LOOKUPS = 1,
 735         FS_DQ_DROPS = 2,
 736         FS_DQ_READS = 3,
 737         FS_DQ_WRITES = 4,
 738         FS_DQ_CACHE_HITS = 5,
 739         FS_DQ_ALLOCATED = 6,
 740         FS_DQ_FREE = 7,
 741         FS_DQ_SYNCS = 8,
 742 };
 743
 744 /* CTL_DEBUG names: */
 745
 746 /* CTL_DEV names: */
 747 enum {
 748         DEV_CDROM=1,
 749         DEV_HWMON=2,
 750         DEV_PARPORT=3,
 751         DEV_RAID=4,
 752         DEV_MAC_HID=5,
 753         DEV_SCSI=6,
 754 };
 755
 756 /* /proc/sys/dev/cdrom */
 757 enum {
 758         DEV_CDROM_INFO=1,
 759         DEV_CDROM_AUTOCLOSE=2,
 760         DEV_CDROM_AUTOEJECT=3,
 761         DEV_CDROM_DEBUG=4,
 762         DEV_CDROM_LOCK=5,
 763         DEV_CDROM_CHECK_MEDIA=6
 764 };
 765
 766 /* /proc/sys/dev/parport */
 767 enum {
 768         DEV_PARPORT_DEFAULT=-3
 769 };
 770
 771 /* /proc/sys/dev/raid */
 772 enum {
 773         DEV_RAID_SPEED_LIMIT_MIN=1,
 774         DEV_RAID_SPEED_LIMIT_MAX=2
 775 };
 776
 777 /* /proc/sys/dev/parport/default */
 778 enum {
 779         DEV_PARPORT_DEFAULT_TIMESLICE=1,
 780         DEV_PARPORT_DEFAULT_SPINTIME=2
 781 };
 782
 783 /* /proc/sys/dev/parport/parport n */
 784 enum {
 785         DEV_PARPORT_SPINTIME=1,
 786         DEV_PARPORT_BASE_ADDR=2,
 787         DEV_PARPORT_IRQ=3,
 788         DEV_PARPORT_DMA=4,
 789         DEV_PARPORT_MODES=5,
 790         DEV_PARPORT_DEVICES=6,
 791         DEV_PARPORT_AUTOPROBE=16
 792 };
 793
 794 /* /proc/sys/dev/parport/parport n/devices/ */
 795 enum {
 796         DEV_PARPORT_DEVICES_ACTIVE=-3,
 797 };
 798
 799 /* /proc/sys/dev/parport/parport n/devices/device n */
 800 enum {
 801         DEV_PARPORT_DEVICE_TIMESLICE=1,
 802 };
 803
 804 /* /proc/sys/dev/mac_hid */
 805 enum {
 806         DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
 807         DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
 808         DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
 809         DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
 810         DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
 811         DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
 812 };
 813
 814 /* /proc/sys/dev/scsi */
 815 enum {
 816         DEV_SCSI_LOGGING_LEVEL=1,
 817 };
 818
 819 /* /proc/sys/abi */
 820 enum
 821 {
 822         ABI_DEFHANDLER_COFF=1,  /* default handler for coff binaries */
 823         ABI_DEFHANDLER_ELF=2,   /* default handler for ELF binaries */
 824         ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
 825         ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
 826         ABI_TRACE=5,            /* tracing flags */
 827         ABI_FAKE_UTSNAME=6,     /* fake target utsname information */
 828 };
 829
 830 #ifdef __KERNEL__
 831
 832 extern void sysctl_init(void);
 833
 834 typedef struct ctl_table ctl_table;
 835
 836 typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,
 837                          void __user *oldval, size_t __user *oldlenp,
 838                          void __user *newval, size_t newlen,
 839                          void **context);
 840
 841 typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
 842                           void __user *buffer, size_t *lenp, loff_t *ppos);
 843
 844 extern int proc_dostring(ctl_table *, int, struct file *,
 845                          void __user *, size_t *, loff_t *);
 846 extern int proc_dointvec(ctl_table *, int, struct file *,
 847                          void __user *, size_t *, loff_t *);
 848 extern int proc_dointvec_bset(ctl_table *, int, struct file *,
 849                               void __user *, size_t *, loff_t *);
 850 extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
 851                                 void __user *, size_t *, loff_t *);
 852 extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
 853                                  void __user *, size_t *, loff_t *);
 854 extern int proc_dointvec_userhz_jiffies(ctl_table *, int, struct file *,
 855                                         void __user *, size_t *, loff_t *);
 856 extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
 857                                   void __user *, size_t *, loff_t *);
 858 extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
 859                                       struct file *, void __user *, size_t *, loff_t *);
 860
 861 extern int do_sysctl (int __user *name, int nlen,
 862                       void __user *oldval, size_t __user *oldlenp,
 863                       void __user *newval, size_t newlen);
 864
 865 extern int do_sysctl_strategy (ctl_table *table,
 866                                int __user *name, int nlen,
 867                                void __user *oldval, size_t __user *oldlenp,
 868                                void __user *newval, size_t newlen, void ** context);
 869
 870 extern ctl_handler sysctl_string;
 871 extern ctl_handler sysctl_intvec;
 872 extern ctl_handler sysctl_jiffies;
 873
 874
 875 /*
 876  * Register a set of sysctl names by calling register_sysctl_table
 877  * with an initialised array of ctl_table's.  An entry with zero
 878  * ctl_name terminates the table.  table->de will be set up by the
 879  * registration and need not be initialised in advance.
 880  *
 881  * sysctl names can be mirrored automatically under /proc/sys.  The
 882  * procname supplied controls /proc naming.
 883  *
 884  * The table's mode will be honoured both for sys_sysctl(2) and
 885  * proc-fs access.
 886  *
 887  * Leaf nodes in the sysctl tree will be represented by a single file
 888  * under /proc; non-leaf nodes will be represented by directories.  A
 889  * null procname disables /proc mirroring at this node.
 890  *
 891  * sysctl(2) can automatically manage read and write requests through
 892  * the sysctl table.  The data and maxlen fields of the ctl_table
 893  * struct enable minimal validation of the values being written to be
 894  * performed, and the mode field allows minimal authentication.
 895  *
 896  * More sophisticated management can be enabled by the provision of a
 897  * strategy routine with the table entry.  This will be called before
 898  * any automatic read or write of the data is performed.
 899  *
 900  * The strategy routine may return:
 901  * <0: Error occurred (error is passed to user process)
 902  * 0:  OK - proceed with automatic read or write.
 903  * >0: OK - read or write has been done by the strategy routine, so
 904  *     return immediately.
 905  *
 906  * There must be a proc_handler routine for any terminal nodes
 907  * mirrored under /proc/sys (non-terminals are handled by a built-in
 908  * directory handler).  Several default handlers are available to
 909  * cover common cases.
 910  */
 911
 912 /* A sysctl table is an array of struct ctl_table: */
 913 struct ctl_table
 914 {
 915         int ctl_name;                   /* Binary ID */
 916         const char *procname;           /* Text ID for /proc/sys, or zero */
 917         void *data;
 918         int maxlen;
 919         mode_t mode;
 920         ctl_table *child;
 921         proc_handler *proc_handler;     /* Callback for text formatting */
 922         ctl_handler *strategy;          /* Callback function for all r/w */
 923         struct proc_dir_entry *de;      /* /proc control block */
 924         void *extra1;
 925         void *extra2;
 926 };
 927
 928 /* struct ctl_table_header is used to maintain dynamic lists of
 929    ctl_table trees. */
 930 struct ctl_table_header
 931 {
 932         ctl_table *ctl_table;
 933         struct list_head ctl_entry;
 934 };
 935
 936 struct ctl_table_header * register_sysctl_table(ctl_table * table,
 937                                                 int insert_at_head);
 938 void unregister_sysctl_table(struct ctl_table_header * table);
 939
 940 #else /* __KERNEL__ */
 941
 942 #endif /* __KERNEL__ */
 943
 944 #endif /* _LINUX_SYSCTL_H */