2 * sysctl.h: General linux system control interface
4 * Begun 24 March 1995, Stephen Tweedie
6 ****************************************************************
7 ****************************************************************
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.
14 ****************************************************************
15 ****************************************************************
18 #ifndef _LINUX_SYSCTL_H
19 #define _LINUX_SYSCTL_H
21 #include <linux/kernel.h>
22 #include <linux/types.h>
23 #include <linux/compiler.h>
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? */
33 struct __sysctl_args {
37 size_t __user *oldlenp;
40 unsigned long __unused[4];
43 /* Define sysctl names first */
45 /* Top-level names: */
47 /* For internal pattern-matching use only: */
49 #define CTL_ANY -1 /* Matches any name */
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) */
70 CTL_BUS_ISA=1 /* ISA */
73 /* /proc/sys/fs/inotify/ */
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 */
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 */
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 */
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 */
106 KERN_ACCT=30, /* BSD process accounting parameters */
107 KERN_PPC_L2CR=31, /* l2cr register on PPC */
109 KERN_RTSIGNR=32, /* Number of rt sigs queued */
110 KERN_RTSIGMAX=33, /* Max queuable */
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 */
155 VM_UNUSED1=1, /* was: struct: Set vm swapping control */
156 VM_UNUSED2=2, /* was; int: Linear or sqrt() swapout for hogs */
157 VM_UNUSED3=3, /* was: struct: Set free page thresholds */
158 VM_UNUSED4=4, /* Spare */
159 VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
160 VM_UNUSED5=6, /* was: struct: Set buffer memory thresholds */
161 VM_UNUSED7=7, /* was: struct: Set cache memory thresholds */
162 VM_UNUSED8=8, /* was: struct: Control kswapd behaviour */
163 VM_UNUSED9=9, /* was: struct: Set page table cache parameters */
164 VM_PAGE_CLUSTER=10, /* int: set number of pages to swap together */
165 VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
166 VM_DIRTY_RATIO=12, /* dirty_ratio */
167 VM_DIRTY_WB_CS=13, /* dirty_writeback_centisecs */
168 VM_DIRTY_EXPIRE_CS=14, /* dirty_expire_centisecs */
169 VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
170 VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
171 VM_PAGEBUF=17, /* struct: Control pagebuf parameters */
172 VM_HUGETLB_PAGES=18, /* int: Number of available Huge Pages */
173 VM_SWAPPINESS=19, /* Tendency to steal mapped memory */
174 VM_LOWMEM_RESERVE_RATIO=20,/* reservation ratio for lower memory zones */
175 VM_MIN_FREE_KBYTES=21, /* Minimum free kilobytes to maintain */
176 VM_MAX_MAP_COUNT=22, /* int: Maximum number of mmaps/address-space */
177 VM_LAPTOP_MODE=23, /* vm laptop mode */
178 VM_BLOCK_DUMP=24, /* block dump mode */
179 VM_HUGETLB_GROUP=25, /* permitted hugetlb group */
180 VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
181 VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
182 VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
183 VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */
184 VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */
185 VM_ZONE_RECLAIM_MODE=31,/* reclaim local zone memory before going off node */
213 /* /proc/sys/kernel/random */
217 RANDOM_ENTROPY_COUNT=2,
218 RANDOM_READ_THRESH=3,
219 RANDOM_WRITE_THRESH=4,
224 /* /proc/sys/kernel/pty */
231 /* /proc/sys/bus/isa */
239 /* /proc/sys/net/core */
244 NET_CORE_WMEM_DEFAULT=3,
245 NET_CORE_RMEM_DEFAULT=4,
246 /* was NET_CORE_DESTROY_DELAY */
247 NET_CORE_MAX_BACKLOG=6,
248 NET_CORE_FASTROUTE=7,
250 NET_CORE_MSG_BURST=9,
251 NET_CORE_OPTMEM_MAX=10,
252 NET_CORE_HOT_LIST_LENGTH=11,
253 NET_CORE_DIVERT_VERSION=12,
254 NET_CORE_NO_CONG_THRESH=13,
257 NET_CORE_MOD_CONG=16,
258 NET_CORE_DEV_WEIGHT=17,
259 NET_CORE_SOMAXCONN=18,
263 /* /proc/sys/net/ethernet */
265 /* /proc/sys/net/802 */
267 /* /proc/sys/net/unix */
271 NET_UNIX_DESTROY_DELAY=1,
272 NET_UNIX_DELETE_DELAY=2,
273 NET_UNIX_MAX_DGRAM_QLEN=3,
276 /* /proc/sys/net/netfilter */
279 NET_NF_CONNTRACK_MAX=1,
280 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
281 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
282 NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
283 NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
284 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
285 NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
286 NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
287 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
288 NET_NF_CONNTRACK_UDP_TIMEOUT=10,
289 NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
290 NET_NF_CONNTRACK_ICMP_TIMEOUT=12,
291 NET_NF_CONNTRACK_GENERIC_TIMEOUT=13,
292 NET_NF_CONNTRACK_BUCKETS=14,
293 NET_NF_CONNTRACK_LOG_INVALID=15,
294 NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
295 NET_NF_CONNTRACK_TCP_LOOSE=17,
296 NET_NF_CONNTRACK_TCP_BE_LIBERAL=18,
297 NET_NF_CONNTRACK_TCP_MAX_RETRANS=19,
298 NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
299 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
300 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
301 NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
302 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
303 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
304 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
305 NET_NF_CONNTRACK_COUNT=27,
306 NET_NF_CONNTRACK_ICMPV6_TIMEOUT=28,
307 NET_NF_CONNTRACK_FRAG6_TIMEOUT=29,
308 NET_NF_CONNTRACK_FRAG6_LOW_THRESH=30,
309 NET_NF_CONNTRACK_FRAG6_HIGH_THRESH=31,
312 /* /proc/sys/net/ipv4 */
315 /* v2.0 compatibile variables */
322 NET_IPV4_FIB_HASH=19,
323 NET_IPV4_NETFILTER=20,
325 NET_IPV4_TCP_TIMESTAMPS=33,
326 NET_IPV4_TCP_WINDOW_SCALING=34,
327 NET_IPV4_TCP_SACK=35,
328 NET_IPV4_TCP_RETRANS_COLLAPSE=36,
329 NET_IPV4_DEFAULT_TTL=37,
330 NET_IPV4_AUTOCONFIG=38,
331 NET_IPV4_NO_PMTU_DISC=39,
332 NET_IPV4_TCP_SYN_RETRIES=40,
333 NET_IPV4_IPFRAG_HIGH_THRESH=41,
334 NET_IPV4_IPFRAG_LOW_THRESH=42,
335 NET_IPV4_IPFRAG_TIME=43,
336 NET_IPV4_TCP_MAX_KA_PROBES=44,
337 NET_IPV4_TCP_KEEPALIVE_TIME=45,
338 NET_IPV4_TCP_KEEPALIVE_PROBES=46,
339 NET_IPV4_TCP_RETRIES1=47,
340 NET_IPV4_TCP_RETRIES2=48,
341 NET_IPV4_TCP_FIN_TIMEOUT=49,
342 NET_IPV4_IP_MASQ_DEBUG=50,
343 NET_TCP_SYNCOOKIES=51,
346 NET_TCP_SYN_TAILDROP=54,
347 NET_TCP_MAX_SYN_BACKLOG=55,
348 NET_IPV4_LOCAL_PORT_RANGE=56,
349 NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
350 NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
351 NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
352 NET_IPV4_ICMP_DESTUNREACH_RATE=60,
353 NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
354 NET_IPV4_ICMP_PARAMPROB_RATE=62,
355 NET_IPV4_ICMP_ECHOREPLY_RATE=63,
356 NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
357 NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
358 NET_TCP_TW_RECYCLE=66,
359 NET_IPV4_ALWAYS_DEFRAG=67,
360 NET_IPV4_TCP_KEEPALIVE_INTVL=68,
361 NET_IPV4_INET_PEER_THRESHOLD=69,
362 NET_IPV4_INET_PEER_MINTTL=70,
363 NET_IPV4_INET_PEER_MAXTTL=71,
364 NET_IPV4_INET_PEER_GC_MINTIME=72,
365 NET_IPV4_INET_PEER_GC_MAXTIME=73,
366 NET_TCP_ORPHAN_RETRIES=74,
367 NET_TCP_ABORT_ON_OVERFLOW=75,
368 NET_TCP_SYNACK_RETRIES=76,
369 NET_TCP_MAX_ORPHANS=77,
370 NET_TCP_MAX_TW_BUCKETS=78,
372 NET_TCP_REORDERING=80,
379 NET_TCP_ADV_WIN_SCALE=87,
380 NET_IPV4_NONLOCAL_BIND=88,
381 NET_IPV4_ICMP_RATELIMIT=89,
382 NET_IPV4_ICMP_RATEMASK=90,
385 NET_TCP_LOW_LATENCY=93,
386 NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
387 NET_IPV4_IGMP_MAX_MSF=96,
388 NET_TCP_NO_METRICS_SAVE=97,
389 NET_TCP_DEFAULT_WIN_SCALE=105,
390 NET_TCP_MODERATE_RCVBUF=106,
391 NET_TCP_TSO_WIN_DIVISOR=107,
392 NET_TCP_BIC_BETA=108,
393 NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR=109,
394 NET_TCP_CONG_CONTROL=110,
396 NET_IPV4_IPFRAG_MAX_DIST=112,
400 NET_IPV4_ROUTE_FLUSH=1,
401 NET_IPV4_ROUTE_MIN_DELAY=2,
402 NET_IPV4_ROUTE_MAX_DELAY=3,
403 NET_IPV4_ROUTE_GC_THRESH=4,
404 NET_IPV4_ROUTE_MAX_SIZE=5,
405 NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
406 NET_IPV4_ROUTE_GC_TIMEOUT=7,
407 NET_IPV4_ROUTE_GC_INTERVAL=8,
408 NET_IPV4_ROUTE_REDIRECT_LOAD=9,
409 NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
410 NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
411 NET_IPV4_ROUTE_ERROR_COST=12,
412 NET_IPV4_ROUTE_ERROR_BURST=13,
413 NET_IPV4_ROUTE_GC_ELASTICITY=14,
414 NET_IPV4_ROUTE_MTU_EXPIRES=15,
415 NET_IPV4_ROUTE_MIN_PMTU=16,
416 NET_IPV4_ROUTE_MIN_ADVMSS=17,
417 NET_IPV4_ROUTE_SECRET_INTERVAL=18,
418 NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS=19,
423 NET_PROTO_CONF_ALL=-2,
424 NET_PROTO_CONF_DEFAULT=-3
426 /* And device ifindices ... */
431 NET_IPV4_CONF_FORWARDING=1,
432 NET_IPV4_CONF_MC_FORWARDING=2,
433 NET_IPV4_CONF_PROXY_ARP=3,
434 NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
435 NET_IPV4_CONF_SECURE_REDIRECTS=5,
436 NET_IPV4_CONF_SEND_REDIRECTS=6,
437 NET_IPV4_CONF_SHARED_MEDIA=7,
438 NET_IPV4_CONF_RP_FILTER=8,
439 NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
440 NET_IPV4_CONF_BOOTP_RELAY=10,
441 NET_IPV4_CONF_LOG_MARTIANS=11,
442 NET_IPV4_CONF_TAG=12,
443 NET_IPV4_CONF_ARPFILTER=13,
444 NET_IPV4_CONF_MEDIUM_ID=14,
445 NET_IPV4_CONF_NOXFRM=15,
446 NET_IPV4_CONF_NOPOLICY=16,
447 NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
448 NET_IPV4_CONF_ARP_ANNOUNCE=18,
449 NET_IPV4_CONF_ARP_IGNORE=19,
450 NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
454 /* /proc/sys/net/ipv4/netfilter */
457 NET_IPV4_NF_CONNTRACK_MAX=1,
458 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
459 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
460 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
461 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
462 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
463 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
464 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
465 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
466 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
467 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
468 NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
469 NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
470 NET_IPV4_NF_CONNTRACK_BUCKETS=14,
471 NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
472 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
473 NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
474 NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
475 NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
476 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
477 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
478 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
479 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
480 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
481 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
482 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
483 NET_IPV4_NF_CONNTRACK_COUNT=27,
486 /* /proc/sys/net/ipv6 */
492 NET_IPV6_BINDV6ONLY=20,
493 NET_IPV6_IP6FRAG_HIGH_THRESH=21,
494 NET_IPV6_IP6FRAG_LOW_THRESH=22,
495 NET_IPV6_IP6FRAG_TIME=23,
496 NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
497 NET_IPV6_MLD_MAX_MSF=25,
501 NET_IPV6_ROUTE_FLUSH=1,
502 NET_IPV6_ROUTE_GC_THRESH=2,
503 NET_IPV6_ROUTE_MAX_SIZE=3,
504 NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
505 NET_IPV6_ROUTE_GC_TIMEOUT=5,
506 NET_IPV6_ROUTE_GC_INTERVAL=6,
507 NET_IPV6_ROUTE_GC_ELASTICITY=7,
508 NET_IPV6_ROUTE_MTU_EXPIRES=8,
509 NET_IPV6_ROUTE_MIN_ADVMSS=9,
510 NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS=10
514 NET_IPV6_FORWARDING=1,
515 NET_IPV6_HOP_LIMIT=2,
517 NET_IPV6_ACCEPT_RA=4,
518 NET_IPV6_ACCEPT_REDIRECTS=5,
520 NET_IPV6_DAD_TRANSMITS=7,
521 NET_IPV6_RTR_SOLICITS=8,
522 NET_IPV6_RTR_SOLICIT_INTERVAL=9,
523 NET_IPV6_RTR_SOLICIT_DELAY=10,
524 NET_IPV6_USE_TEMPADDR=11,
525 NET_IPV6_TEMP_VALID_LFT=12,
526 NET_IPV6_TEMP_PREFERED_LFT=13,
527 NET_IPV6_REGEN_MAX_RETRY=14,
528 NET_IPV6_MAX_DESYNC_FACTOR=15,
529 NET_IPV6_MAX_ADDRESSES=16,
530 NET_IPV6_FORCE_MLD_VERSION=17,
534 /* /proc/sys/net/ipv6/icmp */
536 NET_IPV6_ICMP_RATELIMIT=1
539 /* /proc/sys/net/<protocol>/neigh/<dev> */
541 NET_NEIGH_MCAST_SOLICIT=1,
542 NET_NEIGH_UCAST_SOLICIT=2,
543 NET_NEIGH_APP_SOLICIT=3,
544 NET_NEIGH_RETRANS_TIME=4,
545 NET_NEIGH_REACHABLE_TIME=5,
546 NET_NEIGH_DELAY_PROBE_TIME=6,
547 NET_NEIGH_GC_STALE_TIME=7,
548 NET_NEIGH_UNRES_QLEN=8,
549 NET_NEIGH_PROXY_QLEN=9,
550 NET_NEIGH_ANYCAST_DELAY=10,
551 NET_NEIGH_PROXY_DELAY=11,
552 NET_NEIGH_LOCKTIME=12,
553 NET_NEIGH_GC_INTERVAL=13,
554 NET_NEIGH_GC_THRESH1=14,
555 NET_NEIGH_GC_THRESH2=15,
556 NET_NEIGH_GC_THRESH3=16,
557 NET_NEIGH_RETRANS_TIME_MS=17,
558 NET_NEIGH_REACHABLE_TIME_MS=18,
562 /* /proc/sys/net/ipx */
564 NET_IPX_PPROP_BROADCASTING=1,
568 /* /proc/sys/net/llc */
574 /* /proc/sys/net/llc/llc2 */
579 /* /proc/sys/net/llc/station */
581 NET_LLC_STATION_ACK_TIMEOUT=1,
584 /* /proc/sys/net/llc/llc2/timeout */
586 NET_LLC2_ACK_TIMEOUT=1,
587 NET_LLC2_P_TIMEOUT=2,
588 NET_LLC2_REJ_TIMEOUT=3,
589 NET_LLC2_BUSY_TIMEOUT=4,
592 /* /proc/sys/net/appletalk */
594 NET_ATALK_AARP_EXPIRY_TIME=1,
595 NET_ATALK_AARP_TICK_TIME=2,
596 NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
597 NET_ATALK_AARP_RESOLVE_TIME=4
601 /* /proc/sys/net/netrom */
603 NET_NETROM_DEFAULT_PATH_QUALITY=1,
604 NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
605 NET_NETROM_NETWORK_TTL_INITIALISER=3,
606 NET_NETROM_TRANSPORT_TIMEOUT=4,
607 NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
608 NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
609 NET_NETROM_TRANSPORT_BUSY_DELAY=7,
610 NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
611 NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
612 NET_NETROM_ROUTING_CONTROL=10,
613 NET_NETROM_LINK_FAILS_COUNT=11,
617 /* /proc/sys/net/ax25 */
619 NET_AX25_IP_DEFAULT_MODE=1,
620 NET_AX25_DEFAULT_MODE=2,
621 NET_AX25_BACKOFF_TYPE=3,
622 NET_AX25_CONNECT_MODE=4,
623 NET_AX25_STANDARD_WINDOW=5,
624 NET_AX25_EXTENDED_WINDOW=6,
625 NET_AX25_T1_TIMEOUT=7,
626 NET_AX25_T2_TIMEOUT=8,
627 NET_AX25_T3_TIMEOUT=9,
628 NET_AX25_IDLE_TIMEOUT=10,
631 NET_AX25_PROTOCOL=13,
632 NET_AX25_DAMA_SLAVE_TIMEOUT=14
635 /* /proc/sys/net/rose */
637 NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
638 NET_ROSE_CALL_REQUEST_TIMEOUT=2,
639 NET_ROSE_RESET_REQUEST_TIMEOUT=3,
640 NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
641 NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
642 NET_ROSE_ROUTING_CONTROL=6,
643 NET_ROSE_LINK_FAIL_TIMEOUT=7,
645 NET_ROSE_WINDOW_SIZE=9,
646 NET_ROSE_NO_ACTIVITY_TIMEOUT=10
649 /* /proc/sys/net/x25 */
651 NET_X25_RESTART_REQUEST_TIMEOUT=1,
652 NET_X25_CALL_REQUEST_TIMEOUT=2,
653 NET_X25_RESET_REQUEST_TIMEOUT=3,
654 NET_X25_CLEAR_REQUEST_TIMEOUT=4,
655 NET_X25_ACK_HOLD_BACK_TIMEOUT=5
658 /* /proc/sys/net/token-ring */
664 /* /proc/sys/net/decnet/ */
666 NET_DECNET_NODE_TYPE = 1,
667 NET_DECNET_NODE_ADDRESS = 2,
668 NET_DECNET_NODE_NAME = 3,
669 NET_DECNET_DEFAULT_DEVICE = 4,
670 NET_DECNET_TIME_WAIT = 5,
671 NET_DECNET_DN_COUNT = 6,
672 NET_DECNET_DI_COUNT = 7,
673 NET_DECNET_DR_COUNT = 8,
674 NET_DECNET_DST_GC_INTERVAL = 9,
675 NET_DECNET_CONF = 10,
676 NET_DECNET_NO_FC_MAX_CWND = 11,
678 NET_DECNET_RMEM = 13,
679 NET_DECNET_WMEM = 14,
680 NET_DECNET_DEBUG_LEVEL = 255
683 /* /proc/sys/net/decnet/conf/<dev> */
685 NET_DECNET_CONF_LOOPBACK = -2,
686 NET_DECNET_CONF_DDCMP = -3,
687 NET_DECNET_CONF_PPP = -4,
688 NET_DECNET_CONF_X25 = -5,
689 NET_DECNET_CONF_GRE = -6,
690 NET_DECNET_CONF_ETHER = -7
692 /* ... and ifindex of devices */
695 /* /proc/sys/net/decnet/conf/<dev>/ */
697 NET_DECNET_CONF_DEV_PRIORITY = 1,
698 NET_DECNET_CONF_DEV_T1 = 2,
699 NET_DECNET_CONF_DEV_T2 = 3,
700 NET_DECNET_CONF_DEV_T3 = 4,
701 NET_DECNET_CONF_DEV_FORWARDING = 5,
702 NET_DECNET_CONF_DEV_BLKSIZE = 6,
703 NET_DECNET_CONF_DEV_STATE = 7
706 /* /proc/sys/net/sctp */
708 NET_SCTP_RTO_INITIAL = 1,
709 NET_SCTP_RTO_MIN = 2,
710 NET_SCTP_RTO_MAX = 3,
711 NET_SCTP_RTO_ALPHA = 4,
712 NET_SCTP_RTO_BETA = 5,
713 NET_SCTP_VALID_COOKIE_LIFE = 6,
714 NET_SCTP_ASSOCIATION_MAX_RETRANS = 7,
715 NET_SCTP_PATH_MAX_RETRANS = 8,
716 NET_SCTP_MAX_INIT_RETRANSMITS = 9,
717 NET_SCTP_HB_INTERVAL = 10,
718 NET_SCTP_PRESERVE_ENABLE = 11,
719 NET_SCTP_MAX_BURST = 12,
720 NET_SCTP_ADDIP_ENABLE = 13,
721 NET_SCTP_PRSCTP_ENABLE = 14,
722 NET_SCTP_SNDBUF_POLICY = 15,
723 NET_SCTP_SACK_TIMEOUT = 16,
724 NET_SCTP_RCVBUF_POLICY = 17,
727 /* /proc/sys/net/bridge */
729 NET_BRIDGE_NF_CALL_ARPTABLES = 1,
730 NET_BRIDGE_NF_CALL_IPTABLES = 2,
731 NET_BRIDGE_NF_CALL_IP6TABLES = 3,
732 NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
735 /* CTL_PROC names: */
740 FS_NRINODE=1, /* int:current number of allocated inodes */
742 FS_MAXINODE=3, /* int:maximum number of inodes that can be allocated */
743 FS_NRDQUOT=4, /* int:current number of allocated dquots */
744 FS_MAXDQUOT=5, /* int:maximum number of dquots that can be allocated */
745 FS_NRFILE=6, /* int:current number of allocated filedescriptors */
746 FS_MAXFILE=7, /* int:maximum number of filedescriptors that can be allocated */
748 FS_NRSUPER=9, /* int:current number of allocated super_blocks */
749 FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
750 FS_OVERFLOWUID=11, /* int: overflow UID */
751 FS_OVERFLOWGID=12, /* int: overflow GID */
752 FS_LEASES=13, /* int: leases enabled */
753 FS_DIR_NOTIFY=14, /* int: directory notification enabled */
754 FS_LEASE_TIME=15, /* int: maximum time to wait for a lease break */
755 FS_DQSTATS=16, /* disc quota usage statistics and control */
756 FS_XFS=17, /* struct: control xfs parameters */
757 FS_AIO_NR=18, /* current system-wide number of aio requests */
758 FS_AIO_MAX_NR=19, /* system-wide maximum number of aio requests */
759 FS_INOTIFY=20, /* inotify submenu */
762 /* /proc/sys/fs/quota/ */
768 FS_DQ_CACHE_HITS = 5,
775 /* CTL_DEBUG names: */
788 /* /proc/sys/dev/cdrom */
791 DEV_CDROM_AUTOCLOSE=2,
792 DEV_CDROM_AUTOEJECT=3,
795 DEV_CDROM_CHECK_MEDIA=6
798 /* /proc/sys/dev/parport */
800 DEV_PARPORT_DEFAULT=-3
803 /* /proc/sys/dev/raid */
805 DEV_RAID_SPEED_LIMIT_MIN=1,
806 DEV_RAID_SPEED_LIMIT_MAX=2
809 /* /proc/sys/dev/parport/default */
811 DEV_PARPORT_DEFAULT_TIMESLICE=1,
812 DEV_PARPORT_DEFAULT_SPINTIME=2
815 /* /proc/sys/dev/parport/parport n */
817 DEV_PARPORT_SPINTIME=1,
818 DEV_PARPORT_BASE_ADDR=2,
822 DEV_PARPORT_DEVICES=6,
823 DEV_PARPORT_AUTOPROBE=16
826 /* /proc/sys/dev/parport/parport n/devices/ */
828 DEV_PARPORT_DEVICES_ACTIVE=-3,
831 /* /proc/sys/dev/parport/parport n/devices/device n */
833 DEV_PARPORT_DEVICE_TIMESLICE=1,
836 /* /proc/sys/dev/mac_hid */
838 DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
839 DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
840 DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
841 DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
842 DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
843 DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
846 /* /proc/sys/dev/scsi */
848 DEV_SCSI_LOGGING_LEVEL=1,
851 /* /proc/sys/dev/ipmi */
853 DEV_IPMI_POWEROFF_POWERCYCLE=1,
859 ABI_DEFHANDLER_COFF=1, /* default handler for coff binaries */
860 ABI_DEFHANDLER_ELF=2, /* default handler for ELF binaries */
861 ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
862 ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
863 ABI_TRACE=5, /* tracing flags */
864 ABI_FAKE_UTSNAME=6, /* fake target utsname information */
868 #include <linux/list.h>
870 extern void sysctl_init(void);
872 typedef struct ctl_table ctl_table;
874 typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,
875 void __user *oldval, size_t __user *oldlenp,
876 void __user *newval, size_t newlen,
879 typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
880 void __user *buffer, size_t *lenp, loff_t *ppos);
882 extern int proc_dostring(ctl_table *, int, struct file *,
883 void __user *, size_t *, loff_t *);
884 extern int proc_dointvec(ctl_table *, int, struct file *,
885 void __user *, size_t *, loff_t *);
886 extern int proc_dointvec_bset(ctl_table *, int, struct file *,
887 void __user *, size_t *, loff_t *);
888 extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
889 void __user *, size_t *, loff_t *);
890 extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
891 void __user *, size_t *, loff_t *);
892 extern int proc_dointvec_userhz_jiffies(ctl_table *, int, struct file *,
893 void __user *, size_t *, loff_t *);
894 extern int proc_dointvec_ms_jiffies(ctl_table *, int, struct file *,
895 void __user *, size_t *, loff_t *);
896 extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
897 void __user *, size_t *, loff_t *);
898 extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
899 struct file *, void __user *, size_t *, loff_t *);
901 extern int do_sysctl (int __user *name, int nlen,
902 void __user *oldval, size_t __user *oldlenp,
903 void __user *newval, size_t newlen);
905 extern int do_sysctl_strategy (ctl_table *table,
906 int __user *name, int nlen,
907 void __user *oldval, size_t __user *oldlenp,
908 void __user *newval, size_t newlen, void ** context);
910 extern ctl_handler sysctl_string;
911 extern ctl_handler sysctl_intvec;
912 extern ctl_handler sysctl_jiffies;
913 extern ctl_handler sysctl_ms_jiffies;
917 * Register a set of sysctl names by calling register_sysctl_table
918 * with an initialised array of ctl_table's. An entry with zero
919 * ctl_name terminates the table. table->de will be set up by the
920 * registration and need not be initialised in advance.
922 * sysctl names can be mirrored automatically under /proc/sys. The
923 * procname supplied controls /proc naming.
925 * The table's mode will be honoured both for sys_sysctl(2) and
928 * Leaf nodes in the sysctl tree will be represented by a single file
929 * under /proc; non-leaf nodes will be represented by directories. A
930 * null procname disables /proc mirroring at this node.
932 * sysctl(2) can automatically manage read and write requests through
933 * the sysctl table. The data and maxlen fields of the ctl_table
934 * struct enable minimal validation of the values being written to be
935 * performed, and the mode field allows minimal authentication.
937 * More sophisticated management can be enabled by the provision of a
938 * strategy routine with the table entry. This will be called before
939 * any automatic read or write of the data is performed.
941 * The strategy routine may return:
942 * <0: Error occurred (error is passed to user process)
943 * 0: OK - proceed with automatic read or write.
944 * >0: OK - read or write has been done by the strategy routine, so
945 * return immediately.
947 * There must be a proc_handler routine for any terminal nodes
948 * mirrored under /proc/sys (non-terminals are handled by a built-in
949 * directory handler). Several default handlers are available to
950 * cover common cases.
953 /* A sysctl table is an array of struct ctl_table: */
956 int ctl_name; /* Binary ID */
957 const char *procname; /* Text ID for /proc/sys, or zero */
962 proc_handler *proc_handler; /* Callback for text formatting */
963 ctl_handler *strategy; /* Callback function for all r/w */
964 struct proc_dir_entry *de; /* /proc control block */
969 /* struct ctl_table_header is used to maintain dynamic lists of
971 struct ctl_table_header
973 ctl_table *ctl_table;
974 struct list_head ctl_entry;
976 struct completion *unregistering;
979 struct ctl_table_header * register_sysctl_table(ctl_table * table,
981 void unregister_sysctl_table(struct ctl_table_header * table);
983 #else /* __KERNEL__ */
985 #endif /* __KERNEL__ */
987 #endif /* _LINUX_SYSCTL_H */