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