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 */
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_EXEC_SHIELD=1000, /* int: exec-shield enabled (0/1/2) */
96 KERN_PRINT_FATAL=1001, /* int: print fatal signals (0/1/2) */
97 KERN_VDSO=1002, /* int: VDSO enabled (0/1) */
98 KERN_REALROOTDEV=16, /* real root device to mount after initrd */
99 KERN_VSHELPER=17, /* string: path to vshelper policy agent */
101 KERN_SPARC_REBOOT=21, /* reboot command on Sparc */
102 KERN_CTLALTDEL=22, /* int: allow ctl-alt-del to reboot */
103 KERN_PRINTK=23, /* struct: control printk logging parameters */
104 KERN_NAMETRANS=24, /* Name translation */
105 KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */
106 KERN_PPC_ZEROPAGED=26, /* turn idle page zeroing on/off on PPC */
107 KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */
110 KERN_ACCT=30, /* BSD process accounting parameters */
111 KERN_PPC_L2CR=31, /* l2cr register on PPC */
113 KERN_RTSIGNR=32, /* Number of rt sigs queued */
114 KERN_RTSIGMAX=33, /* Max queuable */
116 KERN_SHMMAX=34, /* long: Maximum shared memory segment */
117 KERN_MSGMAX=35, /* int: Maximum size of a messege */
118 KERN_MSGMNB=36, /* int: Maximum message queue size */
119 KERN_MSGPOOL=37, /* int: Maximum system message pool size */
120 KERN_SYSRQ=38, /* int: Sysreq enable */
121 KERN_MAX_THREADS=39, /* int: Maximum nr of threads in the system */
122 KERN_RANDOM=40, /* Random driver */
123 KERN_SHMALL=41, /* int: Maximum size of shared memory */
124 KERN_MSGMNI=42, /* int: msg queue identifiers */
125 KERN_SEM=43, /* struct: sysv semaphore limits */
126 KERN_SPARC_STOP_A=44, /* int: Sparc Stop-A enable */
127 KERN_SHMMNI=45, /* int: shm array identifiers */
128 KERN_OVERFLOWUID=46, /* int: overflow UID */
129 KERN_OVERFLOWGID=47, /* int: overflow GID */
130 KERN_SHMPATH=48, /* string: path to shm fs */
131 KERN_HOTPLUG=49, /* string: path to uevent helper (deprecated) */
132 KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
133 KERN_S390_USER_DEBUG_LOGGING=51, /* int: dumps of user faults */
134 KERN_CORE_USES_PID=52, /* int: use core or core.%pid */
135 KERN_TAINTED=53, /* int: various kernel tainted flags */
136 KERN_CADPID=54, /* int: PID of the process to notify on CAD */
137 KERN_PIDMAX=55, /* int: PID # limit */
138 KERN_CORE_PATTERN=56, /* string: pattern for core-file names */
139 KERN_PANIC_ON_OOPS=57, /* int: whether we will panic on an oops */
140 KERN_HPPA_PWRSW=58, /* int: hppa soft-power enable */
141 KERN_HPPA_UNALIGNED=59, /* int: hppa unaligned-trap enable */
142 KERN_PRINTK_RATELIMIT=60, /* int: tune printk ratelimiting */
143 KERN_PRINTK_RATELIMIT_BURST=61, /* int: tune printk ratelimiting */
144 KERN_PTY=62, /* dir: pty driver */
145 KERN_NGROUPS_MAX=63, /* int: NGROUPS_MAX */
146 KERN_SPARC_SCONS_PWROFF=64, /* int: serial console power-off halt */
147 KERN_HZ_TIMER=65, /* int: hz timer on or off */
148 KERN_UNKNOWN_NMI_PANIC=66, /* int: unknown nmi panic flag */
149 KERN_BOOTLOADER_TYPE=67, /* int: boot loader type */
150 KERN_RANDOMIZE=68, /* int: randomize virtual address space */
151 KERN_SETUID_DUMPABLE=69, /* int: behaviour of dumps for setuid core */
152 KERN_SPIN_RETRY=70, /* int: number of spinlock retries */
153 KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */
154 KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */
155 KERN_COMPAT_LOG=73, /* int: print compat layer messages */
156 KERN_MAX_LOCK_DEPTH=74,
164 VM_UNUSED1=1, /* was: struct: Set vm swapping control */
165 VM_UNUSED2=2, /* was; int: Linear or sqrt() swapout for hogs */
166 VM_UNUSED3=3, /* was: struct: Set free page thresholds */
167 VM_UNUSED4=4, /* Spare */
168 VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
169 VM_UNUSED5=6, /* was: struct: Set buffer memory thresholds */
170 VM_UNUSED7=7, /* was: struct: Set cache memory thresholds */
171 VM_UNUSED8=8, /* was: struct: Control kswapd behaviour */
172 VM_UNUSED9=9, /* was: struct: Set page table cache parameters */
173 VM_PAGE_CLUSTER=10, /* int: set number of pages to swap together */
174 VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
175 VM_DIRTY_RATIO=12, /* dirty_ratio */
176 VM_DIRTY_WB_CS=13, /* dirty_writeback_centisecs */
177 VM_DIRTY_EXPIRE_CS=14, /* dirty_expire_centisecs */
178 VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
179 VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
180 VM_PAGEBUF=17, /* struct: Control pagebuf parameters */
181 VM_HUGETLB_PAGES=18, /* int: Number of available Huge Pages */
182 VM_SWAPPINESS=19, /* Tendency to steal mapped memory */
183 VM_LOWMEM_RESERVE_RATIO=20,/* reservation ratio for lower memory zones */
184 VM_MIN_FREE_KBYTES=21, /* Minimum free kilobytes to maintain */
185 VM_MAX_MAP_COUNT=22, /* int: Maximum number of mmaps/address-space */
186 VM_LAPTOP_MODE=23, /* vm laptop mode */
187 VM_BLOCK_DUMP=24, /* block dump mode */
188 VM_HUGETLB_GROUP=25, /* permitted hugetlb group */
189 VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
190 VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
191 VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
192 VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */
193 VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */
194 VM_ZONE_RECLAIM_MODE=31, /* reclaim local zone memory before going off node */
195 VM_MIN_UNMAPPED=32, /* Set min percent of unmapped pages */
196 VM_PANIC_ON_OOM=33, /* panic at out-of-memory */
197 VM_VDSO_ENABLED=34, /* map VDSO into new processes? */
198 VM_MIN_SLAB=35, /* Percent pages ignored by zone reclaim */
228 /* /proc/sys/kernel/random */
232 RANDOM_ENTROPY_COUNT=2,
233 RANDOM_READ_THRESH=3,
234 RANDOM_WRITE_THRESH=4,
239 /* /proc/sys/kernel/pty */
246 /* /proc/sys/bus/isa */
254 /* /proc/sys/net/core */
259 NET_CORE_WMEM_DEFAULT=3,
260 NET_CORE_RMEM_DEFAULT=4,
261 /* was NET_CORE_DESTROY_DELAY */
262 NET_CORE_MAX_BACKLOG=6,
263 NET_CORE_FASTROUTE=7,
265 NET_CORE_MSG_BURST=9,
266 NET_CORE_OPTMEM_MAX=10,
267 NET_CORE_HOT_LIST_LENGTH=11,
268 NET_CORE_DIVERT_VERSION=12,
269 NET_CORE_NO_CONG_THRESH=13,
272 NET_CORE_MOD_CONG=16,
273 NET_CORE_DEV_WEIGHT=17,
274 NET_CORE_SOMAXCONN=18,
276 NET_CORE_AEVENT_ETIME=20,
277 NET_CORE_AEVENT_RSEQTH=21,
280 /* /proc/sys/net/ethernet */
282 /* /proc/sys/net/802 */
284 /* /proc/sys/net/unix */
288 NET_UNIX_DESTROY_DELAY=1,
289 NET_UNIX_DELETE_DELAY=2,
290 NET_UNIX_MAX_DGRAM_QLEN=3,
293 /* /proc/sys/net/netfilter */
296 NET_NF_CONNTRACK_MAX=1,
297 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
298 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
299 NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
300 NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
301 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
302 NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
303 NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
304 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
305 NET_NF_CONNTRACK_UDP_TIMEOUT=10,
306 NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
307 NET_NF_CONNTRACK_ICMP_TIMEOUT=12,
308 NET_NF_CONNTRACK_GENERIC_TIMEOUT=13,
309 NET_NF_CONNTRACK_BUCKETS=14,
310 NET_NF_CONNTRACK_LOG_INVALID=15,
311 NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
312 NET_NF_CONNTRACK_TCP_LOOSE=17,
313 NET_NF_CONNTRACK_TCP_BE_LIBERAL=18,
314 NET_NF_CONNTRACK_TCP_MAX_RETRANS=19,
315 NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
316 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
317 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
318 NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
319 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
320 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
321 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
322 NET_NF_CONNTRACK_COUNT=27,
323 NET_NF_CONNTRACK_ICMPV6_TIMEOUT=28,
324 NET_NF_CONNTRACK_FRAG6_TIMEOUT=29,
325 NET_NF_CONNTRACK_FRAG6_LOW_THRESH=30,
326 NET_NF_CONNTRACK_FRAG6_HIGH_THRESH=31,
327 NET_NF_CONNTRACK_CHECKSUM=32,
330 /* /proc/sys/net/ipv4 */
333 /* v2.0 compatibile variables */
340 NET_IPV4_FIB_HASH=19,
341 NET_IPV4_NETFILTER=20,
343 NET_IPV4_TCP_TIMESTAMPS=33,
344 NET_IPV4_TCP_WINDOW_SCALING=34,
345 NET_IPV4_TCP_SACK=35,
346 NET_IPV4_TCP_RETRANS_COLLAPSE=36,
347 NET_IPV4_DEFAULT_TTL=37,
348 NET_IPV4_AUTOCONFIG=38,
349 NET_IPV4_NO_PMTU_DISC=39,
350 NET_IPV4_TCP_SYN_RETRIES=40,
351 NET_IPV4_IPFRAG_HIGH_THRESH=41,
352 NET_IPV4_IPFRAG_LOW_THRESH=42,
353 NET_IPV4_IPFRAG_TIME=43,
354 NET_IPV4_TCP_MAX_KA_PROBES=44,
355 NET_IPV4_TCP_KEEPALIVE_TIME=45,
356 NET_IPV4_TCP_KEEPALIVE_PROBES=46,
357 NET_IPV4_TCP_RETRIES1=47,
358 NET_IPV4_TCP_RETRIES2=48,
359 NET_IPV4_TCP_FIN_TIMEOUT=49,
360 NET_IPV4_IP_MASQ_DEBUG=50,
361 NET_TCP_SYNCOOKIES=51,
364 NET_TCP_SYN_TAILDROP=54,
365 NET_TCP_MAX_SYN_BACKLOG=55,
366 NET_IPV4_LOCAL_PORT_RANGE=56,
367 NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
368 NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
369 NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
370 NET_IPV4_ICMP_DESTUNREACH_RATE=60,
371 NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
372 NET_IPV4_ICMP_PARAMPROB_RATE=62,
373 NET_IPV4_ICMP_ECHOREPLY_RATE=63,
374 NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
375 NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
376 NET_TCP_TW_RECYCLE=66,
377 NET_IPV4_ALWAYS_DEFRAG=67,
378 NET_IPV4_TCP_KEEPALIVE_INTVL=68,
379 NET_IPV4_INET_PEER_THRESHOLD=69,
380 NET_IPV4_INET_PEER_MINTTL=70,
381 NET_IPV4_INET_PEER_MAXTTL=71,
382 NET_IPV4_INET_PEER_GC_MINTIME=72,
383 NET_IPV4_INET_PEER_GC_MAXTIME=73,
384 NET_TCP_ORPHAN_RETRIES=74,
385 NET_TCP_ABORT_ON_OVERFLOW=75,
386 NET_TCP_SYNACK_RETRIES=76,
387 NET_TCP_MAX_ORPHANS=77,
388 NET_TCP_MAX_TW_BUCKETS=78,
390 NET_TCP_REORDERING=80,
397 NET_TCP_ADV_WIN_SCALE=87,
398 NET_IPV4_NONLOCAL_BIND=88,
399 NET_IPV4_ICMP_RATELIMIT=89,
400 NET_IPV4_ICMP_RATEMASK=90,
403 NET_TCP_LOW_LATENCY=93,
404 NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
405 NET_IPV4_IGMP_MAX_MSF=96,
406 NET_TCP_NO_METRICS_SAVE=97,
407 NET_TCP_DEFAULT_WIN_SCALE=105,
408 NET_TCP_MODERATE_RCVBUF=106,
409 NET_TCP_TSO_WIN_DIVISOR=107,
410 NET_TCP_BIC_BETA=108,
411 NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR=109,
412 NET_TCP_CONG_CONTROL=110,
414 NET_IPV4_IPFRAG_MAX_DIST=112,
415 NET_TCP_MTU_PROBING=113,
416 NET_TCP_BASE_MSS=114,
417 NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS=115,
418 NET_TCP_DMA_COPYBREAK=116,
419 NET_TCP_SLOW_START_AFTER_IDLE=117,
420 #ifdef CONFIG_ICMP_IPOD
421 NET_IPV4_ICMP_IPOD_VERSION,
422 NET_IPV4_ICMP_IPOD_ENABLED,
423 NET_IPV4_ICMP_IPOD_HOST,
424 NET_IPV4_ICMP_IPOD_MASK,
425 NET_IPV4_ICMP_IPOD_KEY
430 NET_IPV4_ROUTE_FLUSH=1,
431 NET_IPV4_ROUTE_MIN_DELAY=2,
432 NET_IPV4_ROUTE_MAX_DELAY=3,
433 NET_IPV4_ROUTE_GC_THRESH=4,
434 NET_IPV4_ROUTE_MAX_SIZE=5,
435 NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
436 NET_IPV4_ROUTE_GC_TIMEOUT=7,
437 NET_IPV4_ROUTE_GC_INTERVAL=8,
438 NET_IPV4_ROUTE_REDIRECT_LOAD=9,
439 NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
440 NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
441 NET_IPV4_ROUTE_ERROR_COST=12,
442 NET_IPV4_ROUTE_ERROR_BURST=13,
443 NET_IPV4_ROUTE_GC_ELASTICITY=14,
444 NET_IPV4_ROUTE_MTU_EXPIRES=15,
445 NET_IPV4_ROUTE_MIN_PMTU=16,
446 NET_IPV4_ROUTE_MIN_ADVMSS=17,
447 NET_IPV4_ROUTE_SECRET_INTERVAL=18,
448 NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS=19,
453 NET_PROTO_CONF_ALL=-2,
454 NET_PROTO_CONF_DEFAULT=-3
456 /* And device ifindices ... */
461 NET_IPV4_CONF_FORWARDING=1,
462 NET_IPV4_CONF_MC_FORWARDING=2,
463 NET_IPV4_CONF_PROXY_ARP=3,
464 NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
465 NET_IPV4_CONF_SECURE_REDIRECTS=5,
466 NET_IPV4_CONF_SEND_REDIRECTS=6,
467 NET_IPV4_CONF_SHARED_MEDIA=7,
468 NET_IPV4_CONF_RP_FILTER=8,
469 NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
470 NET_IPV4_CONF_BOOTP_RELAY=10,
471 NET_IPV4_CONF_LOG_MARTIANS=11,
472 NET_IPV4_CONF_TAG=12,
473 NET_IPV4_CONF_ARPFILTER=13,
474 NET_IPV4_CONF_MEDIUM_ID=14,
475 NET_IPV4_CONF_NOXFRM=15,
476 NET_IPV4_CONF_NOPOLICY=16,
477 NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
478 NET_IPV4_CONF_ARP_ANNOUNCE=18,
479 NET_IPV4_CONF_ARP_IGNORE=19,
480 NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
481 NET_IPV4_CONF_ARP_ACCEPT=21,
485 /* /proc/sys/net/ipv4/netfilter */
488 NET_IPV4_NF_CONNTRACK_MAX=1,
489 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
490 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
491 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
492 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
493 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
494 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
495 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
496 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
497 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
498 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
499 NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
500 NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
501 NET_IPV4_NF_CONNTRACK_BUCKETS=14,
502 NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
503 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
504 NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
505 NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
506 NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
507 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
508 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
509 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
510 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
511 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
512 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
513 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
514 NET_IPV4_NF_CONNTRACK_COUNT=27,
515 NET_IPV4_NF_CONNTRACK_CHECKSUM=28,
518 /* /proc/sys/net/ipv6 */
524 NET_IPV6_BINDV6ONLY=20,
525 NET_IPV6_IP6FRAG_HIGH_THRESH=21,
526 NET_IPV6_IP6FRAG_LOW_THRESH=22,
527 NET_IPV6_IP6FRAG_TIME=23,
528 NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
529 NET_IPV6_MLD_MAX_MSF=25,
533 NET_IPV6_ROUTE_FLUSH=1,
534 NET_IPV6_ROUTE_GC_THRESH=2,
535 NET_IPV6_ROUTE_MAX_SIZE=3,
536 NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
537 NET_IPV6_ROUTE_GC_TIMEOUT=5,
538 NET_IPV6_ROUTE_GC_INTERVAL=6,
539 NET_IPV6_ROUTE_GC_ELASTICITY=7,
540 NET_IPV6_ROUTE_MTU_EXPIRES=8,
541 NET_IPV6_ROUTE_MIN_ADVMSS=9,
542 NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS=10
546 NET_IPV6_FORWARDING=1,
547 NET_IPV6_HOP_LIMIT=2,
549 NET_IPV6_ACCEPT_RA=4,
550 NET_IPV6_ACCEPT_REDIRECTS=5,
552 NET_IPV6_DAD_TRANSMITS=7,
553 NET_IPV6_RTR_SOLICITS=8,
554 NET_IPV6_RTR_SOLICIT_INTERVAL=9,
555 NET_IPV6_RTR_SOLICIT_DELAY=10,
556 NET_IPV6_USE_TEMPADDR=11,
557 NET_IPV6_TEMP_VALID_LFT=12,
558 NET_IPV6_TEMP_PREFERED_LFT=13,
559 NET_IPV6_REGEN_MAX_RETRY=14,
560 NET_IPV6_MAX_DESYNC_FACTOR=15,
561 NET_IPV6_MAX_ADDRESSES=16,
562 NET_IPV6_FORCE_MLD_VERSION=17,
563 NET_IPV6_ACCEPT_RA_DEFRTR=18,
564 NET_IPV6_ACCEPT_RA_PINFO=19,
565 NET_IPV6_ACCEPT_RA_RTR_PREF=20,
566 NET_IPV6_RTR_PROBE_INTERVAL=21,
567 NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
571 /* /proc/sys/net/ipv6/icmp */
573 NET_IPV6_ICMP_RATELIMIT=1
576 /* /proc/sys/net/<protocol>/neigh/<dev> */
578 NET_NEIGH_MCAST_SOLICIT=1,
579 NET_NEIGH_UCAST_SOLICIT=2,
580 NET_NEIGH_APP_SOLICIT=3,
581 NET_NEIGH_RETRANS_TIME=4,
582 NET_NEIGH_REACHABLE_TIME=5,
583 NET_NEIGH_DELAY_PROBE_TIME=6,
584 NET_NEIGH_GC_STALE_TIME=7,
585 NET_NEIGH_UNRES_QLEN=8,
586 NET_NEIGH_PROXY_QLEN=9,
587 NET_NEIGH_ANYCAST_DELAY=10,
588 NET_NEIGH_PROXY_DELAY=11,
589 NET_NEIGH_LOCKTIME=12,
590 NET_NEIGH_GC_INTERVAL=13,
591 NET_NEIGH_GC_THRESH1=14,
592 NET_NEIGH_GC_THRESH2=15,
593 NET_NEIGH_GC_THRESH3=16,
594 NET_NEIGH_RETRANS_TIME_MS=17,
595 NET_NEIGH_REACHABLE_TIME_MS=18,
599 /* /proc/sys/net/dccp */
604 /* /proc/sys/net/dccp/default */
606 NET_DCCP_DEFAULT_SEQ_WINDOW = 1,
607 NET_DCCP_DEFAULT_RX_CCID = 2,
608 NET_DCCP_DEFAULT_TX_CCID = 3,
609 NET_DCCP_DEFAULT_ACK_RATIO = 4,
610 NET_DCCP_DEFAULT_SEND_ACKVEC = 5,
611 NET_DCCP_DEFAULT_SEND_NDP = 6,
614 /* /proc/sys/net/ipx */
616 NET_IPX_PPROP_BROADCASTING=1,
620 /* /proc/sys/net/llc */
626 /* /proc/sys/net/llc/llc2 */
631 /* /proc/sys/net/llc/station */
633 NET_LLC_STATION_ACK_TIMEOUT=1,
636 /* /proc/sys/net/llc/llc2/timeout */
638 NET_LLC2_ACK_TIMEOUT=1,
639 NET_LLC2_P_TIMEOUT=2,
640 NET_LLC2_REJ_TIMEOUT=3,
641 NET_LLC2_BUSY_TIMEOUT=4,
644 /* /proc/sys/net/appletalk */
646 NET_ATALK_AARP_EXPIRY_TIME=1,
647 NET_ATALK_AARP_TICK_TIME=2,
648 NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
649 NET_ATALK_AARP_RESOLVE_TIME=4
653 /* /proc/sys/net/netrom */
655 NET_NETROM_DEFAULT_PATH_QUALITY=1,
656 NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
657 NET_NETROM_NETWORK_TTL_INITIALISER=3,
658 NET_NETROM_TRANSPORT_TIMEOUT=4,
659 NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
660 NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
661 NET_NETROM_TRANSPORT_BUSY_DELAY=7,
662 NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
663 NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
664 NET_NETROM_ROUTING_CONTROL=10,
665 NET_NETROM_LINK_FAILS_COUNT=11,
669 /* /proc/sys/net/ax25 */
671 NET_AX25_IP_DEFAULT_MODE=1,
672 NET_AX25_DEFAULT_MODE=2,
673 NET_AX25_BACKOFF_TYPE=3,
674 NET_AX25_CONNECT_MODE=4,
675 NET_AX25_STANDARD_WINDOW=5,
676 NET_AX25_EXTENDED_WINDOW=6,
677 NET_AX25_T1_TIMEOUT=7,
678 NET_AX25_T2_TIMEOUT=8,
679 NET_AX25_T3_TIMEOUT=9,
680 NET_AX25_IDLE_TIMEOUT=10,
683 NET_AX25_PROTOCOL=13,
684 NET_AX25_DAMA_SLAVE_TIMEOUT=14
687 /* /proc/sys/net/rose */
689 NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
690 NET_ROSE_CALL_REQUEST_TIMEOUT=2,
691 NET_ROSE_RESET_REQUEST_TIMEOUT=3,
692 NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
693 NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
694 NET_ROSE_ROUTING_CONTROL=6,
695 NET_ROSE_LINK_FAIL_TIMEOUT=7,
697 NET_ROSE_WINDOW_SIZE=9,
698 NET_ROSE_NO_ACTIVITY_TIMEOUT=10
701 /* /proc/sys/net/x25 */
703 NET_X25_RESTART_REQUEST_TIMEOUT=1,
704 NET_X25_CALL_REQUEST_TIMEOUT=2,
705 NET_X25_RESET_REQUEST_TIMEOUT=3,
706 NET_X25_CLEAR_REQUEST_TIMEOUT=4,
707 NET_X25_ACK_HOLD_BACK_TIMEOUT=5
710 /* /proc/sys/net/token-ring */
716 /* /proc/sys/net/decnet/ */
718 NET_DECNET_NODE_TYPE = 1,
719 NET_DECNET_NODE_ADDRESS = 2,
720 NET_DECNET_NODE_NAME = 3,
721 NET_DECNET_DEFAULT_DEVICE = 4,
722 NET_DECNET_TIME_WAIT = 5,
723 NET_DECNET_DN_COUNT = 6,
724 NET_DECNET_DI_COUNT = 7,
725 NET_DECNET_DR_COUNT = 8,
726 NET_DECNET_DST_GC_INTERVAL = 9,
727 NET_DECNET_CONF = 10,
728 NET_DECNET_NO_FC_MAX_CWND = 11,
730 NET_DECNET_RMEM = 13,
731 NET_DECNET_WMEM = 14,
732 NET_DECNET_DEBUG_LEVEL = 255
735 /* /proc/sys/net/decnet/conf/<dev> */
737 NET_DECNET_CONF_LOOPBACK = -2,
738 NET_DECNET_CONF_DDCMP = -3,
739 NET_DECNET_CONF_PPP = -4,
740 NET_DECNET_CONF_X25 = -5,
741 NET_DECNET_CONF_GRE = -6,
742 NET_DECNET_CONF_ETHER = -7
744 /* ... and ifindex of devices */
747 /* /proc/sys/net/decnet/conf/<dev>/ */
749 NET_DECNET_CONF_DEV_PRIORITY = 1,
750 NET_DECNET_CONF_DEV_T1 = 2,
751 NET_DECNET_CONF_DEV_T2 = 3,
752 NET_DECNET_CONF_DEV_T3 = 4,
753 NET_DECNET_CONF_DEV_FORWARDING = 5,
754 NET_DECNET_CONF_DEV_BLKSIZE = 6,
755 NET_DECNET_CONF_DEV_STATE = 7
758 /* /proc/sys/net/sctp */
760 NET_SCTP_RTO_INITIAL = 1,
761 NET_SCTP_RTO_MIN = 2,
762 NET_SCTP_RTO_MAX = 3,
763 NET_SCTP_RTO_ALPHA = 4,
764 NET_SCTP_RTO_BETA = 5,
765 NET_SCTP_VALID_COOKIE_LIFE = 6,
766 NET_SCTP_ASSOCIATION_MAX_RETRANS = 7,
767 NET_SCTP_PATH_MAX_RETRANS = 8,
768 NET_SCTP_MAX_INIT_RETRANSMITS = 9,
769 NET_SCTP_HB_INTERVAL = 10,
770 NET_SCTP_PRESERVE_ENABLE = 11,
771 NET_SCTP_MAX_BURST = 12,
772 NET_SCTP_ADDIP_ENABLE = 13,
773 NET_SCTP_PRSCTP_ENABLE = 14,
774 NET_SCTP_SNDBUF_POLICY = 15,
775 NET_SCTP_SACK_TIMEOUT = 16,
776 NET_SCTP_RCVBUF_POLICY = 17,
779 /* /proc/sys/net/bridge */
781 NET_BRIDGE_NF_CALL_ARPTABLES = 1,
782 NET_BRIDGE_NF_CALL_IPTABLES = 2,
783 NET_BRIDGE_NF_CALL_IP6TABLES = 3,
784 NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
787 /* /proc/sys/net/tux/ */
793 NET_TUX_CLIENTPORT = 5,
795 NET_TUX_SERVERPORT = 7,
797 NET_TUX_KEEPALIVE_TIMEOUT = 9,
798 NET_TUX_MAX_KEEPALIVE_BW = 10,
799 NET_TUX_DEFER_ACCEPT = 11,
800 NET_TUX_MAX_FREE_REQUESTS = 12,
801 NET_TUX_MAX_CONNECT = 13,
802 NET_TUX_MAX_BACKLOG = 14,
803 NET_TUX_MODE_FORBIDDEN = 15,
804 NET_TUX_MODE_ALLOWED = 16,
805 NET_TUX_MODE_USERSPACE = 17,
806 NET_TUX_MODE_CGI = 18,
807 NET_TUX_CGI_UID = 19,
808 NET_TUX_CGI_GID = 20,
809 NET_TUX_CGIROOT = 21,
810 NET_TUX_LOGENTRY_ALIGN_ORDER = 22,
811 NET_TUX_NONAGLE = 23,
812 NET_TUX_ACK_PINGPONG = 24,
813 NET_TUX_PUSH_ALL = 25,
814 NET_TUX_ZEROCOPY_PARSE = 26,
815 NET_CONFIG_TUX_DEBUG_BLOCKING = 27,
816 NET_TUX_PAGE_AGE_START = 28,
817 NET_TUX_PAGE_AGE_ADV = 29,
818 NET_TUX_PAGE_AGE_MAX = 30,
819 NET_TUX_VIRTUAL_SERVER = 31,
820 NET_TUX_MAX_OBJECT_SIZE = 32,
821 NET_TUX_COMPRESSION = 33,
823 NET_TUX_CGI_INHERIT_CPU = 35,
824 NET_TUX_CGI_CPU_MASK = 36,
825 NET_TUX_ZEROCOPY_HEADER = 37,
826 NET_TUX_ZEROCOPY_SENDFILE = 38,
827 NET_TUX_ALL_USERSPACE = 39,
828 NET_TUX_REDIRECT_LOGGING = 40,
829 NET_TUX_REFERER_LOGGING = 41,
830 NET_TUX_MAX_HEADER_LEN = 42,
831 NET_TUX_404_PAGE = 43,
832 NET_TUX_MAX_KEEPALIVES = 44,
833 NET_TUX_IGNORE_QUERY = 45,
839 FS_NRINODE=1, /* int:current number of allocated inodes */
841 FS_MAXINODE=3, /* int:maximum number of inodes that can be allocated */
842 FS_NRDQUOT=4, /* int:current number of allocated dquots */
843 FS_MAXDQUOT=5, /* int:maximum number of dquots that can be allocated */
844 FS_NRFILE=6, /* int:current number of allocated filedescriptors */
845 FS_MAXFILE=7, /* int:maximum number of filedescriptors that can be allocated */
847 FS_NRSUPER=9, /* int:current number of allocated super_blocks */
848 FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
849 FS_OVERFLOWUID=11, /* int: overflow UID */
850 FS_OVERFLOWGID=12, /* int: overflow GID */
851 FS_LEASES=13, /* int: leases enabled */
852 FS_DIR_NOTIFY=14, /* int: directory notification enabled */
853 FS_LEASE_TIME=15, /* int: maximum time to wait for a lease break */
854 FS_DQSTATS=16, /* disc quota usage statistics and control */
855 FS_XFS=17, /* struct: control xfs parameters */
856 FS_AIO_NR=18, /* current system-wide number of aio requests */
857 FS_AIO_MAX_NR=19, /* system-wide maximum number of aio requests */
858 FS_INOTIFY=20, /* inotify submenu */
861 /* /proc/sys/fs/quota/ */
867 FS_DQ_CACHE_HITS = 5,
874 /* CTL_DEBUG names: */
887 /* /proc/sys/dev/cdrom */
890 DEV_CDROM_AUTOCLOSE=2,
891 DEV_CDROM_AUTOEJECT=3,
894 DEV_CDROM_CHECK_MEDIA=6
897 /* /proc/sys/dev/parport */
899 DEV_PARPORT_DEFAULT=-3
902 /* /proc/sys/dev/raid */
904 DEV_RAID_SPEED_LIMIT_MIN=1,
905 DEV_RAID_SPEED_LIMIT_MAX=2
908 /* /proc/sys/dev/parport/default */
910 DEV_PARPORT_DEFAULT_TIMESLICE=1,
911 DEV_PARPORT_DEFAULT_SPINTIME=2
914 /* /proc/sys/dev/parport/parport n */
916 DEV_PARPORT_SPINTIME=1,
917 DEV_PARPORT_BASE_ADDR=2,
921 DEV_PARPORT_DEVICES=6,
922 DEV_PARPORT_AUTOPROBE=16
925 /* /proc/sys/dev/parport/parport n/devices/ */
927 DEV_PARPORT_DEVICES_ACTIVE=-3,
930 /* /proc/sys/dev/parport/parport n/devices/device n */
932 DEV_PARPORT_DEVICE_TIMESLICE=1,
935 /* /proc/sys/dev/mac_hid */
937 DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
938 DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
939 DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
940 DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
941 DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
942 DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
945 /* /proc/sys/dev/scsi */
947 DEV_SCSI_LOGGING_LEVEL=1,
950 /* /proc/sys/dev/ipmi */
952 DEV_IPMI_POWEROFF_POWERCYCLE=1,
958 ABI_DEFHANDLER_COFF=1, /* default handler for coff binaries */
959 ABI_DEFHANDLER_ELF=2, /* default handler for ELF binaries */
960 ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
961 ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
962 ABI_TRACE=5, /* tracing flags */
963 ABI_FAKE_UTSNAME=6, /* fake target utsname information */
967 #include <linux/list.h>
969 extern void sysctl_init(void);
971 typedef struct ctl_table ctl_table;
973 typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,
974 void __user *oldval, size_t __user *oldlenp,
975 void __user *newval, size_t newlen,
978 typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
979 void __user *buffer, size_t *lenp, loff_t *ppos);
981 typedef int virt_handler (struct ctl_table *ctl, int write, xid_t xid,
982 void **datap, size_t *lenp);
984 extern int proc_dostring(ctl_table *, int, struct file *,
985 void __user *, size_t *, loff_t *);
986 extern int proc_dointvec(ctl_table *, int, struct file *,
987 void __user *, size_t *, loff_t *);
988 extern int proc_dointvec_bset(ctl_table *, int, struct file *,
989 void __user *, size_t *, loff_t *);
990 extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
991 void __user *, size_t *, loff_t *);
992 extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
993 void __user *, size_t *, loff_t *);
994 extern int proc_dointvec_userhz_jiffies(ctl_table *, int, struct file *,
995 void __user *, size_t *, loff_t *);
996 extern int proc_dointvec_ms_jiffies(ctl_table *, int, struct file *,
997 void __user *, size_t *, loff_t *);
998 extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
999 void __user *, size_t *, loff_t *);
1000 extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
1001 struct file *, void __user *, size_t *, loff_t *);
1003 extern int do_sysctl (int __user *name, int nlen,
1004 void __user *oldval, size_t __user *oldlenp,
1005 void __user *newval, size_t newlen);
1007 extern int do_sysctl_strategy (ctl_table *table,
1008 int __user *name, int nlen,
1009 void __user *oldval, size_t __user *oldlenp,
1010 void __user *newval, size_t newlen, void ** context);
1012 extern ctl_handler sysctl_string;
1013 extern ctl_handler sysctl_intvec;
1014 extern ctl_handler sysctl_jiffies;
1015 extern ctl_handler sysctl_ms_jiffies;
1019 * Register a set of sysctl names by calling register_sysctl_table
1020 * with an initialised array of ctl_table's. An entry with zero
1021 * ctl_name terminates the table. table->de will be set up by the
1022 * registration and need not be initialised in advance.
1024 * sysctl names can be mirrored automatically under /proc/sys. The
1025 * procname supplied controls /proc naming.
1027 * The table's mode will be honoured both for sys_sysctl(2) and
1030 * Leaf nodes in the sysctl tree will be represented by a single file
1031 * under /proc; non-leaf nodes will be represented by directories. A
1032 * null procname disables /proc mirroring at this node.
1034 * sysctl(2) can automatically manage read and write requests through
1035 * the sysctl table. The data and maxlen fields of the ctl_table
1036 * struct enable minimal validation of the values being written to be
1037 * performed, and the mode field allows minimal authentication.
1039 * More sophisticated management can be enabled by the provision of a
1040 * strategy routine with the table entry. This will be called before
1041 * any automatic read or write of the data is performed.
1043 * The strategy routine may return:
1044 * <0: Error occurred (error is passed to user process)
1045 * 0: OK - proceed with automatic read or write.
1046 * >0: OK - read or write has been done by the strategy routine, so
1047 * return immediately.
1049 * There must be a proc_handler routine for any terminal nodes
1050 * mirrored under /proc/sys (non-terminals are handled by a built-in
1051 * directory handler). Several default handlers are available to
1052 * cover common cases.
1055 /* A sysctl table is an array of struct ctl_table: */
1058 int ctl_name; /* Binary ID */
1059 const char *procname; /* Text ID for /proc/sys, or zero */
1064 proc_handler *proc_handler; /* Callback for text formatting */
1065 virt_handler *virt_handler; /* Context virtualization */
1066 ctl_handler *strategy; /* Callback function for all r/w */
1067 struct proc_dir_entry *de; /* /proc control block */
1072 /* struct ctl_table_header is used to maintain dynamic lists of
1074 struct ctl_table_header
1076 ctl_table *ctl_table;
1077 struct list_head ctl_entry;
1079 struct completion *unregistering;
1082 struct ctl_table_header * register_sysctl_table(ctl_table * table,
1083 int insert_at_head);
1084 void unregister_sysctl_table(struct ctl_table_header * table);
1086 #else /* __KERNEL__ */
1088 #endif /* __KERNEL__ */
1090 #endif /* _LINUX_SYSCTL_H */