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