include/linux/sysctl.h

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 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
 14  ** to 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  ** --sct
 19  **
 20  ****************************************************************
 21  ****************************************************************
 22  */
 23
 24 #include <linux/lists.h>
 25
 26 #ifndef _LINUX_SYSCTL_H
 27 #define _LINUX_SYSCTL_H
 28
 29 #define CTL_MAXNAME 10
 30
 31 struct __sysctl_args {
 32 int*name;
 33 int nlen;
 34 void*oldval;
 35 size_t*oldlenp;
 36 void*newval;
 37 size_t newlen;
 38 unsigned long __unused[4];
 39 };
 40
 41 /* Define sysctl names first */
 42
 43 /* Top-level names: */
 44
 45 /* For internal pattern-matching use only: */
 46 #ifdef __KERNEL__
 47 #define CTL_ANY -1/* Matches any name */
 48 #define CTL_NONE 0
 49 #endif
 50
 51 enum
 52 {
 53  CTL_KERN=1,/* General kernel info and control */
 54  CTL_VM=2,/* VM management */
 55  CTL_NET=3,/* Networking */
 56  CTL_PROC=4,/* Process info */
 57  CTL_FS=5,/* Filesystems */
 58  CTL_DEBUG=6,/* Debugging */
 59  CTL_DEV=7,/* Devices */
 60  CTL_BUS=8/* Buses */
 61 };
 62
 63 /* CTL_BUS names: */
 64 enum
 65 {
 66  BUS_ISA=1/* ISA */
 67 };
 68
 69 /* CTL_KERN names: */
 70 enum
 71 {
 72  KERN_OSTYPE=1,/* string: system version */
 73  KERN_OSRELEASE=2,/* string: system release */
 74  KERN_OSREV=3,/* int: system revision */
 75  KERN_VERSION=4,/* string: compile time info */
 76  KERN_SECUREMASK=5,/* struct: maximum rights mask */
 77  KERN_PROF=6,/* table: profiling information */
 78  KERN_NODENAME=7,
 79  KERN_DOMAINNAME=8,
 80
 81  KERN_CAP_BSET=14,/* int: capability bounding set */
 82  KERN_PANIC=15,/* int: panic timeout */
 83  KERN_REALROOTDEV=16,/* real root device to mount after initrd */
 84
 85  KERN_SPARC_REBOOT=21,/* reboot command on Sparc */
 86  KERN_CTLALTDEL=22,/* int: allow ctl-alt-del to reboot */
 87  KERN_PRINTK=23,/* struct: control printk logging parameters */
 88  KERN_NAMETRANS=24,/* Name translation */
 89  KERN_PPC_HTABRECLAIM=25,/* turn htab reclaimation on/off on PPC */
 90  KERN_PPC_ZEROPAGED=26,/* turn idle page zeroing on/off on PPC */
 91  KERN_PPC_POWERSAVE_NAP=27,/* use nap mode for power saving */
 92  KERN_MODPROBE=28,
 93  KERN_SG_BIG_BUFF=29,
 94  KERN_ACCT=30,/* BSD process accounting parameters */
 95  KERN_PPC_L2CR=31,/* l2cr register on PPC */
 96
 97  KERN_RTSIGNR=32,/* Number of rt sigs queued */
 98  KERN_RTSIGMAX=33,/* Max queuable */
 99
 100  KERN_SHMMAX=34,/* int: Maximum shared memory segment */
 101  KERN_MSGMAX=35,/* int: Maximum size of a messege */
 102  KERN_MSGMNB=36,/* int: Maximum message queue size */
 103  KERN_MSGPOOL=37,/* int: Maximum system message pool size */
 104  KERN_SYSRQ=38,/* int: Sysreq enable */
 105  KERN_MAX_THREADS=39,/* int: Maximum nr of threads in the system */
 106  KERN_RANDOM=40/* Random driver */
 107 };
 108
 109
 110 /* CTL_VM names: */
 111 enum
 112 {
 113  VM_SWAPCTL=1,/* struct: Set vm swapping control */
 114  VM_SWAPOUT=2,/* int: Background pageout interval */
 115  VM_FREEPG=3,/* struct: Set free page thresholds */
 116  VM_BDFLUSH=4,/* struct: Control buffer cache flushing */
 117  VM_OVERCOMMIT_MEMORY=5,/* Turn off the virtual memory safety limit */
 118  VM_BUFFERMEM=6,/* struct: Set buffer memory thresholds */
 119  VM_PAGECACHE=7,/* struct: Set cache memory thresholds */
 120  VM_PAGERDAEMON=8,/* struct: Control kswapd behaviour */
 121  VM_PGT_CACHE=9,/* struct: Set page table cache parameters */
 122  VM_PAGE_CLUSTER=10/* int: set number of pages to swap together */
 123 };
 124
 125
 126 /* CTL_NET names: */
 127 enum
 128 {
 129  NET_CORE=1,
 130  NET_ETHER=2,
 131  NET_802=3,
 132  NET_UNIX=4,
 133  NET_IPV4=5,
 134  NET_IPX=6,
 135  NET_ATALK=7,
 136  NET_NETROM=8,
 137  NET_AX25=9,
 138  NET_BRIDGE=10,
 139  NET_ROSE=11,
 140  NET_IPV6=12,
 141  NET_X25=13,
 142  NET_TR=14,
 143  NET_DECNET=15,
 144  NET_ECONET=16,
 145  NET_KHTTPD=17
 146 };
 147
 148 /* /proc/sys/kernel/random */
 149 enum
 150 {
 151  RANDOM_POOLSIZE=1,
 152  RANDOM_ENTROPY_COUNT=2,
 153  RANDOM_READ_THRESH=3,
 154  RANDOM_WRITE_THRESH=4,
 155  RANDOM_BOOT_ID=5,
 156  RANDOM_UUID=6
 157 };
 158
 159 /* /proc/sys/bus/isa */
 160 enum
 161 {
 162  BUS_ISA_MEM_BASE=1,
 163  BUS_ISA_PORT_BASE=2,
 164  BUS_ISA_PORT_SHIFT=3
 165 };
 166
 167 /* /proc/sys/net/core */
 168 enum
 169 {
 170  NET_CORE_WMEM_MAX=1,
 171  NET_CORE_RMEM_MAX=2,
 172  NET_CORE_WMEM_DEFAULT=3,
 173  NET_CORE_RMEM_DEFAULT=4,
 174 /* was NET_CORE_DESTROY_DELAY */
 175  NET_CORE_MAX_BACKLOG=6,
 176  NET_CORE_FASTROUTE=7,
 177  NET_CORE_MSG_COST=8,
 178  NET_CORE_MSG_BURST=9,
 179  NET_CORE_OPTMEM_MAX=10
 180 };
 181
 182 /* /proc/sys/net/ethernet */
 183
 184 /* /proc/sys/net/802 */
 185
 186 /* /proc/sys/net/unix */
 187
 188 enum
 189 {
 190  NET_UNIX_DESTROY_DELAY=1,
 191  NET_UNIX_DELETE_DELAY=2,
 192  NET_UNIX_MAX_DGRAM_QLEN=3,
 193 };
 194
 195 /* /proc/sys/net/ipv4 */
 196 enum
 197 {
 198 /* v2.0 compatibile variables */
 199  NET_IPV4_FORWARD=8,
 200  NET_IPV4_DYNADDR=9,
 201
 202  NET_IPV4_CONF=16,
 203  NET_IPV4_NEIGH=17,
 204  NET_IPV4_ROUTE=18,
 205  NET_IPV4_FIB_HASH=19,
 206
 207  NET_IPV4_TCP_TIMESTAMPS=33,
 208  NET_IPV4_TCP_WINDOW_SCALING=34,
 209  NET_IPV4_TCP_SACK=35,
 210  NET_IPV4_TCP_RETRANS_COLLAPSE=36,
 211  NET_IPV4_DEFAULT_TTL=37,
 212  NET_IPV4_AUTOCONFIG=38,
 213  NET_IPV4_NO_PMTU_DISC=39,
 214  NET_IPV4_TCP_SYN_RETRIES=40,
 215  NET_IPV4_IPFRAG_HIGH_THRESH=41,
 216  NET_IPV4_IPFRAG_LOW_THRESH=42,
 217  NET_IPV4_IPFRAG_TIME=43,
 218  NET_IPV4_TCP_MAX_KA_PROBES=44,
 219  NET_IPV4_TCP_KEEPALIVE_TIME=45,
 220  NET_IPV4_TCP_KEEPALIVE_PROBES=46,
 221  NET_IPV4_TCP_RETRIES1=47,
 222  NET_IPV4_TCP_RETRIES2=48,
 223  NET_IPV4_TCP_FIN_TIMEOUT=49,
 224  NET_IPV4_IP_MASQ_DEBUG=50,
 225  NET_TCP_SYNCOOKIES=51,
 226  NET_TCP_STDURG=52,
 227  NET_TCP_RFC1337=53,
 228  NET_TCP_SYN_TAILDROP=54,
 229  NET_TCP_MAX_SYN_BACKLOG=55,
 230  NET_IPV4_LOCAL_PORT_RANGE=56,
 231  NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
 232  NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
 233  NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
 234  NET_IPV4_ICMP_DESTUNREACH_RATE=60,
 235  NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
 236  NET_IPV4_ICMP_PARAMPROB_RATE=62,
 237  NET_IPV4_ICMP_ECHOREPLY_RATE=63,
 238  NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
 239  NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
 240  NET_TCP_TW_RECYCLE=66,
 241  NET_IPV4_TCP_KEEPALIVE_INTVL=67,
 242 };
 243
 244 enum{
 245  NET_IPV4_ROUTE_FLUSH=1,
 246  NET_IPV4_ROUTE_MIN_DELAY=2,
 247  NET_IPV4_ROUTE_MAX_DELAY=3,
 248  NET_IPV4_ROUTE_GC_THRESH=4,
 249  NET_IPV4_ROUTE_MAX_SIZE=5,
 250  NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
 251  NET_IPV4_ROUTE_GC_TIMEOUT=7,
 252  NET_IPV4_ROUTE_GC_INTERVAL=8,
 253  NET_IPV4_ROUTE_REDIRECT_LOAD=9,
 254  NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
 255  NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
 256  NET_IPV4_ROUTE_ERROR_COST=12,
 257  NET_IPV4_ROUTE_ERROR_BURST=13,
 258  NET_IPV4_ROUTE_GC_ELASTICITY=14,
 259  NET_IPV4_ROUTE_MTU_EXPIRES=15,
 260  NET_IPV4_ROUTE_MIN_PMTU=16,
 261  NET_IPV4_ROUTE_MIN_ADVMSS=17
 262 };
 263
 264 enum
 265 {
 266  NET_PROTO_CONF_ALL=-2,
 267  NET_PROTO_CONF_DEFAULT=-3
 268
 269 /* And device ifindices ... */
 270 };
 271
 272 enum
 273 {
 274  NET_IPV4_CONF_FORWARDING=1,
 275  NET_IPV4_CONF_MC_FORWARDING=2,
 276  NET_IPV4_CONF_PROXY_ARP=3,
 277  NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
 278  NET_IPV4_CONF_SECURE_REDIRECTS=5,
 279  NET_IPV4_CONF_SEND_REDIRECTS=6,
 280  NET_IPV4_CONF_SHARED_MEDIA=7,
 281  NET_IPV4_CONF_RP_FILTER=8,
 282  NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
 283  NET_IPV4_CONF_BOOTP_RELAY=10,
 284  NET_IPV4_CONF_LOG_MARTIANS=11,
 285  NET_IPV4_CONF_TAG=12
 286 };
 287
 288 /* /proc/sys/net/ipv6 */
 289 enum{
 290  NET_IPV6_CONF=16,
 291  NET_IPV6_NEIGH=17,
 292  NET_IPV6_ROUTE=18
 293 };
 294
 295 enum{
 296  NET_IPV6_ROUTE_FLUSH=1,
 297  NET_IPV6_ROUTE_GC_THRESH=2,
 298  NET_IPV6_ROUTE_MAX_SIZE=3,
 299  NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
 300  NET_IPV6_ROUTE_GC_TIMEOUT=5,
 301  NET_IPV6_ROUTE_GC_INTERVAL=6,
 302  NET_IPV6_ROUTE_GC_ELASTICITY=7,
 303  NET_IPV6_ROUTE_MTU_EXPIRES=8,
 304  NET_IPV6_ROUTE_MIN_ADVMSS=9
 305 };
 306
 307 enum{
 308  NET_IPV6_FORWARDING=1,
 309  NET_IPV6_HOP_LIMIT=2,
 310  NET_IPV6_MTU=3,
 311  NET_IPV6_ACCEPT_RA=4,
 312  NET_IPV6_ACCEPT_REDIRECTS=5,
 313  NET_IPV6_AUTOCONF=6,
 314  NET_IPV6_DAD_TRANSMITS=7,
 315  NET_IPV6_RTR_SOLICITS=8,
 316  NET_IPV6_RTR_SOLICIT_INTERVAL=9,
 317  NET_IPV6_RTR_SOLICIT_DELAY=10
 318 };
 319
 320 /* /proc/sys/net/<protocol>/neigh/<dev> */
 321 enum{
 322  NET_NEIGH_MCAST_SOLICIT=1,
 323  NET_NEIGH_UCAST_SOLICIT=2,
 324  NET_NEIGH_APP_SOLICIT=3,
 325  NET_NEIGH_RETRANS_TIME=4,
 326  NET_NEIGH_REACHABLE_TIME=5,
 327  NET_NEIGH_DELAY_PROBE_TIME=6,
 328  NET_NEIGH_GC_STALE_TIME=7,
 329  NET_NEIGH_UNRES_QLEN=8,
 330  NET_NEIGH_PROXY_QLEN=9,
 331  NET_NEIGH_ANYCAST_DELAY=10,
 332  NET_NEIGH_PROXY_DELAY=11,
 333  NET_NEIGH_LOCKTIME=12,
 334  NET_NEIGH_GC_INTERVAL=13,
 335  NET_NEIGH_GC_THRESH1=14,
 336  NET_NEIGH_GC_THRESH2=15,
 337  NET_NEIGH_GC_THRESH3=16
 338 };
 339
 340 /* /proc/sys/net/ipx */
 341
 342
 343 /* /proc/sys/net/appletalk */
 344 enum{
 345  NET_ATALK_AARP_EXPIRY_TIME=1,
 346  NET_ATALK_AARP_TICK_TIME=2,
 347  NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
 348  NET_ATALK_AARP_RESOLVE_TIME=4
 349 };
 350
 351
 352 /* /proc/sys/net/netrom */
 353 enum{
 354  NET_NETROM_DEFAULT_PATH_QUALITY=1,
 355  NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
 356  NET_NETROM_NETWORK_TTL_INITIALISER=3,
 357  NET_NETROM_TRANSPORT_TIMEOUT=4,
 358  NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
 359  NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
 360  NET_NETROM_TRANSPORT_BUSY_DELAY=7,
 361  NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
 362  NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
 363  NET_NETROM_ROUTING_CONTROL=10,
 364  NET_NETROM_LINK_FAILS_COUNT=11
 365 };
 366
 367 /* /proc/sys/net/ax25 */
 368 enum{
 369  NET_AX25_IP_DEFAULT_MODE=1,
 370  NET_AX25_DEFAULT_MODE=2,
 371  NET_AX25_BACKOFF_TYPE=3,
 372  NET_AX25_CONNECT_MODE=4,
 373  NET_AX25_STANDARD_WINDOW=5,
 374  NET_AX25_EXTENDED_WINDOW=6,
 375  NET_AX25_T1_TIMEOUT=7,
 376  NET_AX25_T2_TIMEOUT=8,
 377  NET_AX25_T3_TIMEOUT=9,
 378  NET_AX25_IDLE_TIMEOUT=10,
 379  NET_AX25_N2=11,
 380  NET_AX25_PACLEN=12,
 381  NET_AX25_PROTOCOL=13,
 382  NET_AX25_DAMA_SLAVE_TIMEOUT=14
 383 };
 384
 385 /* /proc/sys/net/rose */
 386 enum{
 387  NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
 388  NET_ROSE_CALL_REQUEST_TIMEOUT=2,
 389  NET_ROSE_RESET_REQUEST_TIMEOUT=3,
 390  NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
 391  NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
 392  NET_ROSE_ROUTING_CONTROL=6,
 393  NET_ROSE_LINK_FAIL_TIMEOUT=7,
 394  NET_ROSE_MAX_VCS=8,
 395  NET_ROSE_WINDOW_SIZE=9,
 396  NET_ROSE_NO_ACTIVITY_TIMEOUT=10
 397 };
 398
 399 /* /proc/sys/net/x25 */
 400 enum{
 401  NET_X25_RESTART_REQUEST_TIMEOUT=1,
 402  NET_X25_CALL_REQUEST_TIMEOUT=2,
 403  NET_X25_RESET_REQUEST_TIMEOUT=3,
 404  NET_X25_CLEAR_REQUEST_TIMEOUT=4,
 405  NET_X25_ACK_HOLD_BACK_TIMEOUT=5
 406 };
 407
 408 /* /proc/sys/net/token-ring */
 409 enum
 410 {
 411  NET_TR_RIF_TIMEOUT=1
 412 };
 413
 414 /* /proc/sys/net/decnet/ */
 415 enum{
 416  NET_DECNET_NODE_TYPE =1,
 417  NET_DECNET_NODE_ADDRESS =2,
 418  NET_DECNET_NODE_NAME =3,
 419  NET_DECNET_DEFAULT_DEVICE =4,
 420  NET_DECNET_TIME_WAIT =5,
 421  NET_DECNET_DN_COUNT =6,
 422  NET_DECNET_DI_COUNT =7,
 423  NET_DECNET_DR_COUNT =8,
 424  NET_DECNET_DST_GC_INTERVAL =9,
 425  NET_DECNET_CONF =10,
 426  NET_DECNET_DEBUG_LEVEL =255
 427 };
 428
 429 /* /proc/sys/net/khttpd/ */
 430 enum{
 431  NET_KHTTPD_DOCROOT =1,
 432  NET_KHTTPD_START =2,
 433  NET_KHTTPD_STOP =3,
 434  NET_KHTTPD_UNLOAD =4,
 435  NET_KHTTPD_CLIENTPORT =5,
 436  NET_KHTTPD_PERMREQ =6,
 437  NET_KHTTPD_PERMFORBID =7,
 438  NET_KHTTPD_LOGGING =8,
 439  NET_KHTTPD_SERVERPORT =9,
 440  NET_KHTTPD_DYNAMICSTRING=10,
 441  NET_KHTTPD_SLOPPYMIME =11,
 442  NET_KHTTPD_THREADS =12,
 443  NET_KHTTPD_MAXCONNECT =13
 444 };
 445
 446 /* /proc/sys/net/decnet/conf/<dev> */
 447 enum{
 448  NET_DECNET_CONF_LOOPBACK = -2,
 449  NET_DECNET_CONF_DDCMP = -3,
 450  NET_DECNET_CONF_PPP = -4,
 451  NET_DECNET_CONF_X25 = -5,
 452  NET_DECNET_CONF_GRE = -6,
 453  NET_DECNET_CONF_ETHER = -7
 454
 455 /* ... and ifindex of devices */
 456 };
 457
 458 /* /proc/sys/net/decnet/conf/<dev>/ */
 459 enum{
 460  NET_DECNET_CONF_DEV_PRIORITY =1,
 461  NET_DECNET_CONF_DEV_T1 =2,
 462  NET_DECNET_CONF_DEV_T2 =3,
 463  NET_DECNET_CONF_DEV_T3 =4,
 464  NET_DECNET_CONF_DEV_COST =5,
 465  NET_DECNET_CONF_DEV_BLKSIZE =6,
 466  NET_DECNET_CONF_DEV_STATE =7
 467 };
 468
 469 /* CTL_PROC names: */
 470
 471 /* CTL_FS names: */
 472 enum
 473 {
 474  FS_NRINODE=1,/* int:current number of allocated inodes */
 475  FS_STATINODE=2,
 476  FS_MAXINODE=3,/* int:maximum number of inodes that can be allocated */
 477  FS_NRDQUOT=4,/* int:current number of allocated dquots */
 478  FS_MAXDQUOT=5,/* int:maximum number of dquots that can be allocated */
 479  FS_NRFILE=6,/* int:current number of allocated filedescriptors */
 480  FS_MAXFILE=7,/* int:maximum number of filedescriptors that can be allocated */
 481  FS_DENTRY=8,
 482  FS_NRSUPER=9,/* int:current number of allocated super_blocks */
 483  FS_MAXSUPER=10/* int:maximum number of super_blocks that can be allocated */
 484 };
 485
 486 /* CTL_DEBUG names: */
 487
 488 /* CTL_DEV names: */
 489 enum{
 490  DEV_CDROM=1,
 491  DEV_HWMON=2,
 492  DEV_PARPORT=3
 493 };
 494
 495 /* /proc/sys/dev/cdrom */
 496 enum{
 497  DEV_CDROM_INFO=1,
 498  DEV_CDROM_AUTOCLOSE=2,
 499  DEV_CDROM_AUTOEJECT=3,
 500  DEV_CDROM_DEBUG=4,
 501  DEV_CDROM_LOCK=5,
 502  DEV_CDROM_CHECK_MEDIA=6
 503 };
 504
 505 /* /proc/sys/dev/parport */
 506 enum{
 507  DEV_PARPORT_DEFAULT=-3
 508 };
 509
 510 /* /proc/sys/dev/parport/default */
 511 enum{
 512  DEV_PARPORT_DEFAULT_TIMESLICE=1,
 513  DEV_PARPORT_DEFAULT_SPINTIME=2
 514 };
 515
 516 /* /proc/sys/dev/parport/parport n */
 517 enum{
 518  DEV_PARPORT_SPINTIME=1,
 519  DEV_PARPORT_HARDWARE=2,
 520  DEV_PARPORT_DEVICES=3,
 521  DEV_PARPORT_AUTOPROBE=16
 522 };
 523
 524 /* /proc/sys/dev/parport/parport n/devices/ */
 525 enum{
 526  DEV_PARPORT_DEVICES_ACTIVE=-3,
 527 };
 528
 529 /* /proc/sys/dev/parport/parport n/devices/device n */
 530 enum{
 531  DEV_PARPORT_DEVICE_TIMESLICE=1,
 532 };
 533
 534 #ifdef __KERNEL__
 535
 536 extern asmlinkage longsys_sysctl(struct __sysctl_args *);
 537 externvoidsysctl_init(void);
 538
 539 typedefstruct ctl_table ctl_table;
 540
 541 typedefintctl_handler(ctl_table *table,int*name,int nlen,
 542 void*oldval,size_t*oldlenp,
 543 void*newval,size_t newlen,
 544 void**context);
 545
 546 typedefintproc_handler(ctl_table *ctl,int write,struct file * filp,
 547 void*buffer,size_t*lenp);
 548
 549 externintproc_dostring(ctl_table *,int,struct file *,
 550 void*,size_t*);
 551 externintproc_dointvec(ctl_table *,int,struct file *,
 552 void*,size_t*);
 553 externintproc_dointvec_bset(ctl_table *,int,struct file *,
 554 void*,size_t*);
 555 externintproc_dointvec_minmax(ctl_table *,int,struct file *,
 556 void*,size_t*);
 557 externintproc_dointvec_jiffies(ctl_table *,int,struct file *,
 558 void*,size_t*);
 559 externintproc_doulongvec_minmax(ctl_table *,int,struct file *,
 560 void*,size_t*);
 561 externintproc_doulongvec_ms_jiffies_minmax(ctl_table *table,int,
 562 struct file *,void*,size_t*);
 563
 564 externintdo_sysctl(int*name,int nlen,
 565 void*oldval,size_t*oldlenp,
 566 void*newval,size_t newlen);
 567
 568 externintdo_sysctl_strategy(ctl_table *table,
 569 int*name,int nlen,
 570 void*oldval,size_t*oldlenp,
 571 void*newval,size_t newlen,void** context);
 572
 573 extern ctl_handler sysctl_string;
 574 extern ctl_handler sysctl_intvec;
 575 extern ctl_handler sysctl_jiffies;
 576
 577 externintdo_string(
 578 void*oldval,size_t*oldlenp,void*newval,size_t newlen,
 579 int rdwr,char*data,size_t max);
 580 externintdo_int(
 581 void*oldval,size_t*oldlenp,void*newval,size_t newlen,
 582 int rdwr,int*data);
 583 externintdo_struct(
 584 void*oldval,size_t*oldlenp,void*newval,size_t newlen,
 585 int rdwr,void*data,size_t len);
 586
 587
 588 /*
 589  * Register a set of sysctl names by calling register_sysctl_table
 590  * with an initialised array of ctl_table's. An entry with zero
 591  * ctl_name terminates the table. table->de will be set up by the
 592  * registration and need not be initialised in advance.
 593  *
 594  * sysctl names can be mirrored automatically under /proc/sys. The
 595  * procname supplied controls /proc naming.
 596  *
 597  * The table's mode will be honoured both for sys_sysctl(2) and
 598  * proc-fs access.
 599  *
 600  * Leaf nodes in the sysctl tree will be represented by a single file
 601  * under /proc; non-leaf nodes will be represented by directories. A
 602  * null procname disables /proc mirroring at this node.
 603  *
 604  * sysctl(2) can automatically manage read and write requests through
 605  * the sysctl table. The data and maxlen fields of the ctl_table
 606  * struct enable minimal validation of the values being written to be
 607  * performed, and the mode field allows minimal authentication.
 608  *
 609  * More sophisticated management can be enabled by the provision of a
 610  * strategy routine with the table entry. This will be called before
 611  * any automatic read or write of the data is performed.
 612  *
 613  * The strategy routine may return:
 614  * <0: Error occurred (error is passed to user process)
 615  * 0: OK - proceed with automatic read or write.
 616  * >0: OK - read or write has been done by the strategy routine, so
 617  * return immediately.
 618  *
 619  * There must be a proc_handler routine for any terminal nodes
 620  * mirrored under /proc/sys (non-terminals are handled by a built-in
 621  * directory handler). Several default handlers are available to
 622  * cover common cases.
 623  */
 624
 625 /* A sysctl table is an array of struct ctl_table: */
 626 struct ctl_table
 627 {
 628 int ctl_name;/* Binary ID */
 629 const char*procname;/* Text ID for /proc/sys, or zero */
 630 void*data;
 631 int maxlen;
 632  mode_t mode;
 633  ctl_table *child;
 634  proc_handler *proc_handler;/* Callback for text formatting */
 635  ctl_handler *strategy;/* Callback function for all r/w */
 636 struct proc_dir_entry *de;/* /proc control block */
 637 void*extra1;
 638 void*extra2;
 639 };
 640
 641 /* struct ctl_table_header is used to maintain dynamic lists of
 642  ctl_table trees. */
 643 struct ctl_table_header
 644 {
 645  ctl_table *ctl_table;
 646 DLNODE(struct ctl_table_header) ctl_entry;
 647 };
 648
 649 struct ctl_table_header *register_sysctl_table(ctl_table * table,
 650 int insert_at_head);
 651 voidunregister_sysctl_table(struct ctl_table_header * table);
 652
 653 #else/* __KERNEL__ */
 654
 655 #endif/* __KERNEL__ */
 656
 657 #endif/* _LINUX_SYSCTL_H */