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[PATCH] sysctl: C99 convert arch/mips/lasat/sysctl.c and remove ABI breakage
[linux-block.git] / include / linux / sysctl.h
CommitLineData
1da177e4
LT		 1/*
2 * sysctl.h: General linux system control interface
3 *
4 * Begun 24 March 1995, Stephen Tweedie
5 *
6 ****************************************************************
7 ****************************************************************
8 **
7cc13edc 9 ** WARNING:
1da177e4 10 ** The values in this file are exported to user space via
7cc13edc
EB		 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
93aec204 14 ** redefine an existing interface, use a new number for it.
7cc13edc
EB		 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.
1da177e4
LT		 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>
1da177e4
LT		 30#include <linux/compiler.h>
31
32struct file;
330d57fb 33struct completion;
1da177e4
LT		 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
40struct __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
7cc13edc 58#define CTL_UNNUMBERED CTL_NONE /* sysctl without a binary number */
1da177e4
LT		 59#endif
60
61enum
62{
63 CTL_KERN=1, /* General kernel info and control */
64 CTL_VM=2, /* VM management */
65 CTL_NET=3, /* Networking */
eab03ac7 66 /* was CTL_PROC */
1da177e4
LT		 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 */
50d851f7
EB		 72 CTL_CPU=10, /* CPU stuff (speed scaling, etc) */
73 CTL_SUNRPC=7249, /* sunrpc debug */
462591b8 74 CTL_PM=9899, /* frv power management */
77f6dfb1 75 CTL_FRV=9898, /* frv specific sysctls */
1da177e4
LT		 76};
77
78/* CTL_BUS names: */
79enum
80{
81 CTL_BUS_ISA=1 /* ISA */
82};
83
0399cb08 84/* /proc/sys/fs/inotify/ */
0eeca283
RL		 85enum
86{
0399cb08
RL		 87 INOTIFY_MAX_USER_INSTANCES=1, /* max instances per user */
88 INOTIFY_MAX_USER_WATCHES=2, /* max watches per user */
89 INOTIFY_MAX_QUEUED_EVENTS=3 /* max queued events per instance */
0eeca283
RL		 90};
91
1da177e4
LT		 92/* CTL_KERN names: */
93enum
94{
95 KERN_OSTYPE=1, /* string: system version */
96 KERN_OSRELEASE=2, /* string: system release */
97 KERN_OSREV=3, /* int: system revision */
98 KERN_VERSION=4, /* string: compile time info */
99 KERN_SECUREMASK=5, /* struct: maximum rights mask */
100 KERN_PROF=6, /* table: profiling information */
101 KERN_NODENAME=7,
102 KERN_DOMAINNAME=8,
103
104 KERN_CAP_BSET=14, /* int: capability bounding set */
105 KERN_PANIC=15, /* int: panic timeout */
106 KERN_REALROOTDEV=16, /* real root device to mount after initrd */
107
108 KERN_SPARC_REBOOT=21, /* reboot command on Sparc */
109 KERN_CTLALTDEL=22, /* int: allow ctl-alt-del to reboot */
110 KERN_PRINTK=23, /* struct: control printk logging parameters */
111 KERN_NAMETRANS=24, /* Name translation */
112 KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */
113 KERN_PPC_ZEROPAGED=26, /* turn idle page zeroing on/off on PPC */
114 KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */
115 KERN_MODPROBE=28,
116 KERN_SG_BIG_BUFF=29,
117 KERN_ACCT=30, /* BSD process accounting parameters */
118 KERN_PPC_L2CR=31, /* l2cr register on PPC */
119
120 KERN_RTSIGNR=32, /* Number of rt sigs queued */
121 KERN_RTSIGMAX=33, /* Max queuable */
122
123 KERN_SHMMAX=34, /* long: Maximum shared memory segment */
124 KERN_MSGMAX=35, /* int: Maximum size of a messege */
125 KERN_MSGMNB=36, /* int: Maximum message queue size */
126 KERN_MSGPOOL=37, /* int: Maximum system message pool size */
127 KERN_SYSRQ=38, /* int: Sysreq enable */
128 KERN_MAX_THREADS=39, /* int: Maximum nr of threads in the system */
129 KERN_RANDOM=40, /* Random driver */
130 KERN_SHMALL=41, /* int: Maximum size of shared memory */
131 KERN_MSGMNI=42, /* int: msg queue identifiers */
132 KERN_SEM=43, /* struct: sysv semaphore limits */
133 KERN_SPARC_STOP_A=44, /* int: Sparc Stop-A enable */
134 KERN_SHMMNI=45, /* int: shm array identifiers */
135 KERN_OVERFLOWUID=46, /* int: overflow UID */
136 KERN_OVERFLOWGID=47, /* int: overflow GID */
137 KERN_SHMPATH=48, /* string: path to shm fs */
312c004d 138 KERN_HOTPLUG=49, /* string: path to uevent helper (deprecated) */
1da177e4
LT		 139 KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
140 KERN_S390_USER_DEBUG_LOGGING=51, /* int: dumps of user faults */
141 KERN_CORE_USES_PID=52, /* int: use core or core.%pid */
142 KERN_TAINTED=53, /* int: various kernel tainted flags */
143 KERN_CADPID=54, /* int: PID of the process to notify on CAD */
144 KERN_PIDMAX=55, /* int: PID # limit */
145 KERN_CORE_PATTERN=56, /* string: pattern for core-file names */
146 KERN_PANIC_ON_OOPS=57, /* int: whether we will panic on an oops */
147 KERN_HPPA_PWRSW=58, /* int: hppa soft-power enable */
148 KERN_HPPA_UNALIGNED=59, /* int: hppa unaligned-trap enable */
149 KERN_PRINTK_RATELIMIT=60, /* int: tune printk ratelimiting */
150 KERN_PRINTK_RATELIMIT_BURST=61, /* int: tune printk ratelimiting */
151 KERN_PTY=62, /* dir: pty driver */
152 KERN_NGROUPS_MAX=63, /* int: NGROUPS_MAX */
153 KERN_SPARC_SCONS_PWROFF=64, /* int: serial console power-off halt */
154 KERN_HZ_TIMER=65, /* int: hz timer on or off */
155 KERN_UNKNOWN_NMI_PANIC=66, /* int: unknown nmi panic flag */
156 KERN_BOOTLOADER_TYPE=67, /* int: boot loader type */
157 KERN_RANDOMIZE=68, /* int: randomize virtual address space */
d6e71144 158 KERN_SETUID_DUMPABLE=69, /* int: behaviour of dumps for setuid core */
951f22d5 159 KERN_SPIN_RETRY=70, /* int: number of spinlock retries */
c255d844 160 KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */
d2b176ed 161 KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */
bebfa101 162 KERN_COMPAT_LOG=73, /* int: print compat layer messages */
23f78d4a 163 KERN_MAX_LOCK_DEPTH=74,
407984f1 164 KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
8da5adda 165 KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
1da177e4
LT		 166};
167
168
bebfa101 169
1da177e4
LT		 170/* CTL_VM names: */
171enum
172{
173 VM_UNUSED1=1, /* was: struct: Set vm swapping control */
174 VM_UNUSED2=2, /* was; int: Linear or sqrt() swapout for hogs */
175 VM_UNUSED3=3, /* was: struct: Set free page thresholds */
176 VM_UNUSED4=4, /* Spare */
177 VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
178 VM_UNUSED5=6, /* was: struct: Set buffer memory thresholds */
179 VM_UNUSED7=7, /* was: struct: Set cache memory thresholds */
180 VM_UNUSED8=8, /* was: struct: Control kswapd behaviour */
181 VM_UNUSED9=9, /* was: struct: Set page table cache parameters */
182 VM_PAGE_CLUSTER=10, /* int: set number of pages to swap together */
183 VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
184 VM_DIRTY_RATIO=12, /* dirty_ratio */
185 VM_DIRTY_WB_CS=13, /* dirty_writeback_centisecs */
186 VM_DIRTY_EXPIRE_CS=14, /* dirty_expire_centisecs */
187 VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
188 VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
189 VM_PAGEBUF=17, /* struct: Control pagebuf parameters */
190 VM_HUGETLB_PAGES=18, /* int: Number of available Huge Pages */
191 VM_SWAPPINESS=19, /* Tendency to steal mapped memory */
192 VM_LOWMEM_RESERVE_RATIO=20,/* reservation ratio for lower memory zones */
193 VM_MIN_FREE_KBYTES=21, /* Minimum free kilobytes to maintain */
194 VM_MAX_MAP_COUNT=22, /* int: Maximum number of mmaps/address-space */
195 VM_LAPTOP_MODE=23, /* vm laptop mode */
196 VM_BLOCK_DUMP=24, /* block dump mode */
197 VM_HUGETLB_GROUP=25, /* permitted hugetlb group */
198 VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
199 VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
200 VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
9d0243bc 201 VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */
8ad4b1fb 202 VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */
2a11ff06 203 VM_ZONE_RECLAIM_MODE=31, /* reclaim local zone memory before going off node */
9614634f 204 VM_MIN_UNMAPPED=32, /* Set min percent of unmapped pages */
fadd8fbd 205 VM_PANIC_ON_OOM=33, /* panic at out-of-memory */
e6e5494c 206 VM_VDSO_ENABLED=34, /* map VDSO into new processes? */
0ff38490 207 VM_MIN_SLAB=35, /* Percent pages ignored by zone reclaim */
1da177e4
LT		 208};
209
210
211/* CTL_NET names: */
212enum
213{
214 NET_CORE=1,
215 NET_ETHER=2,
216 NET_802=3,
217 NET_UNIX=4,
218 NET_IPV4=5,
219 NET_IPX=6,
220 NET_ATALK=7,
221 NET_NETROM=8,
222 NET_AX25=9,
223 NET_BRIDGE=10,
224 NET_ROSE=11,
225 NET_IPV6=12,
226 NET_X25=13,
227 NET_TR=14,
228 NET_DECNET=15,
229 NET_ECONET=16,
590232a7
ACM		 230 NET_SCTP=17,
231 NET_LLC=18,
9fb9cbb1 232 NET_NETFILTER=19,
e55d912f 233 NET_DCCP=20,
1da177e4
LT		 234};
235
236/* /proc/sys/kernel/random */
237enum
238{
239 RANDOM_POOLSIZE=1,
240 RANDOM_ENTROPY_COUNT=2,
241 RANDOM_READ_THRESH=3,
242 RANDOM_WRITE_THRESH=4,
243 RANDOM_BOOT_ID=5,
244 RANDOM_UUID=6
245};
246
247/* /proc/sys/kernel/pty */
248enum
249{
250 PTY_MAX=1,
251 PTY_NR=2
252};
253
254/* /proc/sys/bus/isa */
255enum
256{
257 BUS_ISA_MEM_BASE=1,
258 BUS_ISA_PORT_BASE=2,
259 BUS_ISA_PORT_SHIFT=3
260};
261
262/* /proc/sys/net/core */
263enum
264{
265 NET_CORE_WMEM_MAX=1,
266 NET_CORE_RMEM_MAX=2,
267 NET_CORE_WMEM_DEFAULT=3,
268 NET_CORE_RMEM_DEFAULT=4,
269/* was NET_CORE_DESTROY_DELAY */
270 NET_CORE_MAX_BACKLOG=6,
271 NET_CORE_FASTROUTE=7,
272 NET_CORE_MSG_COST=8,
273 NET_CORE_MSG_BURST=9,
274 NET_CORE_OPTMEM_MAX=10,
275 NET_CORE_HOT_LIST_LENGTH=11,
276 NET_CORE_DIVERT_VERSION=12,
277 NET_CORE_NO_CONG_THRESH=13,
278 NET_CORE_NO_CONG=14,
279 NET_CORE_LO_CONG=15,
280 NET_CORE_MOD_CONG=16,
281 NET_CORE_DEV_WEIGHT=17,
282 NET_CORE_SOMAXCONN=18,
51b0bded 283 NET_CORE_BUDGET=19,
f8cd5488
JHS		 284 NET_CORE_AEVENT_ETIME=20,
285 NET_CORE_AEVENT_RSEQTH=21,
1da177e4
LT		 286};
287
288/* /proc/sys/net/ethernet */
289
290/* /proc/sys/net/802 */
291
292/* /proc/sys/net/unix */
293
294enum
295{
296 NET_UNIX_DESTROY_DELAY=1,
297 NET_UNIX_DELETE_DELAY=2,
298 NET_UNIX_MAX_DGRAM_QLEN=3,
299};
300
9fb9cbb1
YK		 301/* /proc/sys/net/netfilter */
302enum
303{
304 NET_NF_CONNTRACK_MAX=1,
305 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
306 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
307 NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
308 NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
309 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
310 NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
311 NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
312 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
313 NET_NF_CONNTRACK_UDP_TIMEOUT=10,
314 NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
315 NET_NF_CONNTRACK_ICMP_TIMEOUT=12,
316 NET_NF_CONNTRACK_GENERIC_TIMEOUT=13,
317 NET_NF_CONNTRACK_BUCKETS=14,
318 NET_NF_CONNTRACK_LOG_INVALID=15,
319 NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
320 NET_NF_CONNTRACK_TCP_LOOSE=17,
321 NET_NF_CONNTRACK_TCP_BE_LIBERAL=18,
322 NET_NF_CONNTRACK_TCP_MAX_RETRANS=19,
323 NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
324 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
325 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
326 NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
327 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
328 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
329 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
330 NET_NF_CONNTRACK_COUNT=27,
331 NET_NF_CONNTRACK_ICMPV6_TIMEOUT=28,
332 NET_NF_CONNTRACK_FRAG6_TIMEOUT=29,
333 NET_NF_CONNTRACK_FRAG6_LOW_THRESH=30,
334 NET_NF_CONNTRACK_FRAG6_HIGH_THRESH=31,
39a27a35 335 NET_NF_CONNTRACK_CHECKSUM=32,
9fb9cbb1
YK		 336};
337
1da177e4
LT		 338/* /proc/sys/net/ipv4 */
339enum
340{
341 /* v2.0 compatibile variables */
342 NET_IPV4_FORWARD=8,
343 NET_IPV4_DYNADDR=9,
344
345 NET_IPV4_CONF=16,
346 NET_IPV4_NEIGH=17,
347 NET_IPV4_ROUTE=18,
348 NET_IPV4_FIB_HASH=19,
349 NET_IPV4_NETFILTER=20,
350
351 NET_IPV4_TCP_TIMESTAMPS=33,
352 NET_IPV4_TCP_WINDOW_SCALING=34,
353 NET_IPV4_TCP_SACK=35,
354 NET_IPV4_TCP_RETRANS_COLLAPSE=36,
355 NET_IPV4_DEFAULT_TTL=37,
356 NET_IPV4_AUTOCONFIG=38,
357 NET_IPV4_NO_PMTU_DISC=39,
358 NET_IPV4_TCP_SYN_RETRIES=40,
359 NET_IPV4_IPFRAG_HIGH_THRESH=41,
360 NET_IPV4_IPFRAG_LOW_THRESH=42,
361 NET_IPV4_IPFRAG_TIME=43,
362 NET_IPV4_TCP_MAX_KA_PROBES=44,
363 NET_IPV4_TCP_KEEPALIVE_TIME=45,
364 NET_IPV4_TCP_KEEPALIVE_PROBES=46,
365 NET_IPV4_TCP_RETRIES1=47,
366 NET_IPV4_TCP_RETRIES2=48,
367 NET_IPV4_TCP_FIN_TIMEOUT=49,
368 NET_IPV4_IP_MASQ_DEBUG=50,
369 NET_TCP_SYNCOOKIES=51,
370 NET_TCP_STDURG=52,
371 NET_TCP_RFC1337=53,
372 NET_TCP_SYN_TAILDROP=54,
373 NET_TCP_MAX_SYN_BACKLOG=55,
374 NET_IPV4_LOCAL_PORT_RANGE=56,
375 NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
376 NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
377 NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
378 NET_IPV4_ICMP_DESTUNREACH_RATE=60,
379 NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
380 NET_IPV4_ICMP_PARAMPROB_RATE=62,
381 NET_IPV4_ICMP_ECHOREPLY_RATE=63,
382 NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
383 NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
384 NET_TCP_TW_RECYCLE=66,
385 NET_IPV4_ALWAYS_DEFRAG=67,
386 NET_IPV4_TCP_KEEPALIVE_INTVL=68,
387 NET_IPV4_INET_PEER_THRESHOLD=69,
388 NET_IPV4_INET_PEER_MINTTL=70,
389 NET_IPV4_INET_PEER_MAXTTL=71,
390 NET_IPV4_INET_PEER_GC_MINTIME=72,
391 NET_IPV4_INET_PEER_GC_MAXTIME=73,
392 NET_TCP_ORPHAN_RETRIES=74,
393 NET_TCP_ABORT_ON_OVERFLOW=75,
394 NET_TCP_SYNACK_RETRIES=76,
395 NET_TCP_MAX_ORPHANS=77,
396 NET_TCP_MAX_TW_BUCKETS=78,
397 NET_TCP_FACK=79,
398 NET_TCP_REORDERING=80,
399 NET_TCP_ECN=81,
400 NET_TCP_DSACK=82,
401 NET_TCP_MEM=83,
402 NET_TCP_WMEM=84,
403 NET_TCP_RMEM=85,
404 NET_TCP_APP_WIN=86,
405 NET_TCP_ADV_WIN_SCALE=87,
406 NET_IPV4_NONLOCAL_BIND=88,
407 NET_IPV4_ICMP_RATELIMIT=89,
408 NET_IPV4_ICMP_RATEMASK=90,
409 NET_TCP_TW_REUSE=91,
410 NET_TCP_FRTO=92,
411 NET_TCP_LOW_LATENCY=93,
412 NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
1da177e4
LT		 413 NET_IPV4_IGMP_MAX_MSF=96,
414 NET_TCP_NO_METRICS_SAVE=97,
1da177e4
LT		 415 NET_TCP_DEFAULT_WIN_SCALE=105,
416 NET_TCP_MODERATE_RCVBUF=106,
417 NET_TCP_TSO_WIN_DIVISOR=107,
418 NET_TCP_BIC_BETA=108,
1c2fb7f9 419 NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR=109,
317a76f9 420 NET_TCP_CONG_CONTROL=110,
9772efb9 421 NET_TCP_ABC=111,
89cee8b1 422 NET_IPV4_IPFRAG_MAX_DIST=112,
5d424d5a
JH		 423 NET_TCP_MTU_PROBING=113,
424 NET_TCP_BASE_MSS=114,
15d99e02 425 NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS=115,
95937825 426 NET_TCP_DMA_COPYBREAK=116,
35089bb2 427 NET_TCP_SLOW_START_AFTER_IDLE=117,
446fda4f
PM		 428 NET_CIPSOV4_CACHE_ENABLE=118,
429 NET_CIPSOV4_CACHE_BUCKET_SIZE=119,
430 NET_CIPSOV4_RBM_OPTFMT=120,
431 NET_CIPSOV4_RBM_STRICTVALID=121,
3ff825b2 432 NET_TCP_AVAIL_CONG_CONTROL=122,
ce7bc3bf 433 NET_TCP_ALLOWED_CONG_CONTROL=123,
1da177e4
LT		 434};
435
436enum {
437 NET_IPV4_ROUTE_FLUSH=1,
438 NET_IPV4_ROUTE_MIN_DELAY=2,
439 NET_IPV4_ROUTE_MAX_DELAY=3,
440 NET_IPV4_ROUTE_GC_THRESH=4,
441 NET_IPV4_ROUTE_MAX_SIZE=5,
442 NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
443 NET_IPV4_ROUTE_GC_TIMEOUT=7,
444 NET_IPV4_ROUTE_GC_INTERVAL=8,
445 NET_IPV4_ROUTE_REDIRECT_LOAD=9,
446 NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
447 NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
448 NET_IPV4_ROUTE_ERROR_COST=12,
449 NET_IPV4_ROUTE_ERROR_BURST=13,
450 NET_IPV4_ROUTE_GC_ELASTICITY=14,
451 NET_IPV4_ROUTE_MTU_EXPIRES=15,
452 NET_IPV4_ROUTE_MIN_PMTU=16,
453 NET_IPV4_ROUTE_MIN_ADVMSS=17,
454 NET_IPV4_ROUTE_SECRET_INTERVAL=18,
455 NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS=19,
456};
457
458enum
459{
460 NET_PROTO_CONF_ALL=-2,
461 NET_PROTO_CONF_DEFAULT=-3
462
463 /* And device ifindices ... */
464};
465
466enum
467{
468 NET_IPV4_CONF_FORWARDING=1,
469 NET_IPV4_CONF_MC_FORWARDING=2,
470 NET_IPV4_CONF_PROXY_ARP=3,
471 NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
472 NET_IPV4_CONF_SECURE_REDIRECTS=5,
473 NET_IPV4_CONF_SEND_REDIRECTS=6,
474 NET_IPV4_CONF_SHARED_MEDIA=7,
475 NET_IPV4_CONF_RP_FILTER=8,
476 NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
477 NET_IPV4_CONF_BOOTP_RELAY=10,
478 NET_IPV4_CONF_LOG_MARTIANS=11,
479 NET_IPV4_CONF_TAG=12,
480 NET_IPV4_CONF_ARPFILTER=13,
481 NET_IPV4_CONF_MEDIUM_ID=14,
482 NET_IPV4_CONF_NOXFRM=15,
483 NET_IPV4_CONF_NOPOLICY=16,
484 NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
485 NET_IPV4_CONF_ARP_ANNOUNCE=18,
486 NET_IPV4_CONF_ARP_IGNORE=19,
8f937c60 487 NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
abd596a4 488 NET_IPV4_CONF_ARP_ACCEPT=21,
1da177e4
LT		 489 __NET_IPV4_CONF_MAX
490};
491
492/* /proc/sys/net/ipv4/netfilter */
493enum
494{
495 NET_IPV4_NF_CONNTRACK_MAX=1,
496 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
497 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
498 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
499 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
500 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
501 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
502 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
503 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
504 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
505 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
506 NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
507 NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
508 NET_IPV4_NF_CONNTRACK_BUCKETS=14,
509 NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
510 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
511 NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
512 NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
513 NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
514 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
515 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
516 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
517 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
518 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
519 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
520 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
521 NET_IPV4_NF_CONNTRACK_COUNT=27,
39a27a35 522 NET_IPV4_NF_CONNTRACK_CHECKSUM=28,
1da177e4
LT		 523};
524
525/* /proc/sys/net/ipv6 */
526enum {
527 NET_IPV6_CONF=16,
528 NET_IPV6_NEIGH=17,
529 NET_IPV6_ROUTE=18,
530 NET_IPV6_ICMP=19,
531 NET_IPV6_BINDV6ONLY=20,
532 NET_IPV6_IP6FRAG_HIGH_THRESH=21,
533 NET_IPV6_IP6FRAG_LOW_THRESH=22,
534 NET_IPV6_IP6FRAG_TIME=23,
535 NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
536 NET_IPV6_MLD_MAX_MSF=25,
537};
538
539enum {
540 NET_IPV6_ROUTE_FLUSH=1,
541 NET_IPV6_ROUTE_GC_THRESH=2,
542 NET_IPV6_ROUTE_MAX_SIZE=3,
543 NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
544 NET_IPV6_ROUTE_GC_TIMEOUT=5,
545 NET_IPV6_ROUTE_GC_INTERVAL=6,
546 NET_IPV6_ROUTE_GC_ELASTICITY=7,
547 NET_IPV6_ROUTE_MTU_EXPIRES=8,
548 NET_IPV6_ROUTE_MIN_ADVMSS=9,
549 NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS=10
550};
551
552enum {
553 NET_IPV6_FORWARDING=1,
554 NET_IPV6_HOP_LIMIT=2,
555 NET_IPV6_MTU=3,
556 NET_IPV6_ACCEPT_RA=4,
557 NET_IPV6_ACCEPT_REDIRECTS=5,
558 NET_IPV6_AUTOCONF=6,
559 NET_IPV6_DAD_TRANSMITS=7,
560 NET_IPV6_RTR_SOLICITS=8,
561 NET_IPV6_RTR_SOLICIT_INTERVAL=9,
562 NET_IPV6_RTR_SOLICIT_DELAY=10,
563 NET_IPV6_USE_TEMPADDR=11,
564 NET_IPV6_TEMP_VALID_LFT=12,
565 NET_IPV6_TEMP_PREFERED_LFT=13,
566 NET_IPV6_REGEN_MAX_RETRY=14,
567 NET_IPV6_MAX_DESYNC_FACTOR=15,
568 NET_IPV6_MAX_ADDRESSES=16,
569 NET_IPV6_FORCE_MLD_VERSION=17,
65f5c7c1 570 NET_IPV6_ACCEPT_RA_DEFRTR=18,
c4fd30eb 571 NET_IPV6_ACCEPT_RA_PINFO=19,
930d6ff2 572 NET_IPV6_ACCEPT_RA_RTR_PREF=20,
52e16356 573 NET_IPV6_RTR_PROBE_INTERVAL=21,
09c884d4 574 NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
fbea49e1 575 NET_IPV6_PROXY_NDP=23,
1da177e4
LT		 576 __NET_IPV6_MAX
577};
578
579/* /proc/sys/net/ipv6/icmp */
580enum {
581 NET_IPV6_ICMP_RATELIMIT=1
582};
583
584/* /proc/sys/net/<protocol>/neigh/<dev> */
585enum {
586 NET_NEIGH_MCAST_SOLICIT=1,
587 NET_NEIGH_UCAST_SOLICIT=2,
588 NET_NEIGH_APP_SOLICIT=3,
589 NET_NEIGH_RETRANS_TIME=4,
590 NET_NEIGH_REACHABLE_TIME=5,
591 NET_NEIGH_DELAY_PROBE_TIME=6,
592 NET_NEIGH_GC_STALE_TIME=7,
593 NET_NEIGH_UNRES_QLEN=8,
594 NET_NEIGH_PROXY_QLEN=9,
595 NET_NEIGH_ANYCAST_DELAY=10,
596 NET_NEIGH_PROXY_DELAY=11,
597 NET_NEIGH_LOCKTIME=12,
598 NET_NEIGH_GC_INTERVAL=13,
599 NET_NEIGH_GC_THRESH1=14,
600 NET_NEIGH_GC_THRESH2=15,
601 NET_NEIGH_GC_THRESH3=16,
602 NET_NEIGH_RETRANS_TIME_MS=17,
603 NET_NEIGH_REACHABLE_TIME_MS=18,
604 __NET_NEIGH_MAX
605};
606
e55d912f
ACM		 607/* /proc/sys/net/dccp */
608enum {
609 NET_DCCP_DEFAULT=1,
610};
611
1da177e4
LT		 612/* /proc/sys/net/ipx */
613enum {
614 NET_IPX_PPROP_BROADCASTING=1,
615 NET_IPX_FORWARDING=2
616};
617
590232a7
ACM		 618/* /proc/sys/net/llc */
619enum {
620 NET_LLC2=1,
621 NET_LLC_STATION=2,
622};
623
624/* /proc/sys/net/llc/llc2 */
625enum {
626 NET_LLC2_TIMEOUT=1,
627};
628
629/* /proc/sys/net/llc/station */
630enum {
631 NET_LLC_STATION_ACK_TIMEOUT=1,
632};
633
634/* /proc/sys/net/llc/llc2/timeout */
635enum {
636 NET_LLC2_ACK_TIMEOUT=1,
637 NET_LLC2_P_TIMEOUT=2,
638 NET_LLC2_REJ_TIMEOUT=3,
639 NET_LLC2_BUSY_TIMEOUT=4,
640};
1da177e4
LT		 641
642/* /proc/sys/net/appletalk */
643enum {
644 NET_ATALK_AARP_EXPIRY_TIME=1,
645 NET_ATALK_AARP_TICK_TIME=2,
646 NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
647 NET_ATALK_AARP_RESOLVE_TIME=4
648};
649
650
651/* /proc/sys/net/netrom */
652enum {
653 NET_NETROM_DEFAULT_PATH_QUALITY=1,
654 NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
655 NET_NETROM_NETWORK_TTL_INITIALISER=3,
656 NET_NETROM_TRANSPORT_TIMEOUT=4,
657 NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
658 NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
659 NET_NETROM_TRANSPORT_BUSY_DELAY=7,
660 NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
661 NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
662 NET_NETROM_ROUTING_CONTROL=10,
e21ce8c7
RB		 663 NET_NETROM_LINK_FAILS_COUNT=11,
664 NET_NETROM_RESET=12
1da177e4
LT		 665};
666
667/* /proc/sys/net/ax25 */
668enum {
669 NET_AX25_IP_DEFAULT_MODE=1,
670 NET_AX25_DEFAULT_MODE=2,
671 NET_AX25_BACKOFF_TYPE=3,
672 NET_AX25_CONNECT_MODE=4,
673 NET_AX25_STANDARD_WINDOW=5,
674 NET_AX25_EXTENDED_WINDOW=6,
675 NET_AX25_T1_TIMEOUT=7,
676 NET_AX25_T2_TIMEOUT=8,
677 NET_AX25_T3_TIMEOUT=9,
678 NET_AX25_IDLE_TIMEOUT=10,
679 NET_AX25_N2=11,
680 NET_AX25_PACLEN=12,
681 NET_AX25_PROTOCOL=13,
682 NET_AX25_DAMA_SLAVE_TIMEOUT=14
683};
684
685/* /proc/sys/net/rose */
686enum {
687 NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
688 NET_ROSE_CALL_REQUEST_TIMEOUT=2,
689 NET_ROSE_RESET_REQUEST_TIMEOUT=3,
690 NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
691 NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
692 NET_ROSE_ROUTING_CONTROL=6,
693 NET_ROSE_LINK_FAIL_TIMEOUT=7,
694 NET_ROSE_MAX_VCS=8,
695 NET_ROSE_WINDOW_SIZE=9,
696 NET_ROSE_NO_ACTIVITY_TIMEOUT=10
697};
698
699/* /proc/sys/net/x25 */
700enum {
701 NET_X25_RESTART_REQUEST_TIMEOUT=1,
702 NET_X25_CALL_REQUEST_TIMEOUT=2,
703 NET_X25_RESET_REQUEST_TIMEOUT=3,
704 NET_X25_CLEAR_REQUEST_TIMEOUT=4,
39e21c0d
AH		 705 NET_X25_ACK_HOLD_BACK_TIMEOUT=5,
706 NET_X25_FORWARD=6
1da177e4
LT		 707};
708
709/* /proc/sys/net/token-ring */
710enum
711{
712 NET_TR_RIF_TIMEOUT=1
713};
714
715/* /proc/sys/net/decnet/ */
716enum {
717 NET_DECNET_NODE_TYPE = 1,
718 NET_DECNET_NODE_ADDRESS = 2,
719 NET_DECNET_NODE_NAME = 3,
720 NET_DECNET_DEFAULT_DEVICE = 4,
721 NET_DECNET_TIME_WAIT = 5,
722 NET_DECNET_DN_COUNT = 6,
723 NET_DECNET_DI_COUNT = 7,
724 NET_DECNET_DR_COUNT = 8,
725 NET_DECNET_DST_GC_INTERVAL = 9,
726 NET_DECNET_CONF = 10,
727 NET_DECNET_NO_FC_MAX_CWND = 11,
1f12bcc9
SW		 728 NET_DECNET_MEM = 12,
729 NET_DECNET_RMEM = 13,
730 NET_DECNET_WMEM = 14,
1da177e4
LT		 731 NET_DECNET_DEBUG_LEVEL = 255
732};
733
734/* /proc/sys/net/decnet/conf/<dev> */
735enum {
736 NET_DECNET_CONF_LOOPBACK = -2,
737 NET_DECNET_CONF_DDCMP = -3,
738 NET_DECNET_CONF_PPP = -4,
739 NET_DECNET_CONF_X25 = -5,
740 NET_DECNET_CONF_GRE = -6,
741 NET_DECNET_CONF_ETHER = -7
742
743 /* ... and ifindex of devices */
744};
745
746/* /proc/sys/net/decnet/conf/<dev>/ */
747enum {
748 NET_DECNET_CONF_DEV_PRIORITY = 1,
749 NET_DECNET_CONF_DEV_T1 = 2,
750 NET_DECNET_CONF_DEV_T2 = 3,
751 NET_DECNET_CONF_DEV_T3 = 4,
752 NET_DECNET_CONF_DEV_FORWARDING = 5,
753 NET_DECNET_CONF_DEV_BLKSIZE = 6,
754 NET_DECNET_CONF_DEV_STATE = 7
755};
756
757/* /proc/sys/net/sctp */
758enum {
759 NET_SCTP_RTO_INITIAL = 1,
760 NET_SCTP_RTO_MIN = 2,
761 NET_SCTP_RTO_MAX = 3,
762 NET_SCTP_RTO_ALPHA = 4,
763 NET_SCTP_RTO_BETA = 5,
764 NET_SCTP_VALID_COOKIE_LIFE = 6,
765 NET_SCTP_ASSOCIATION_MAX_RETRANS = 7,
766 NET_SCTP_PATH_MAX_RETRANS = 8,
767 NET_SCTP_MAX_INIT_RETRANSMITS = 9,
768 NET_SCTP_HB_INTERVAL = 10,
769 NET_SCTP_PRESERVE_ENABLE = 11,
770 NET_SCTP_MAX_BURST = 12,
771 NET_SCTP_ADDIP_ENABLE = 13,
772 NET_SCTP_PRSCTP_ENABLE = 14,
4eb701df 773 NET_SCTP_SNDBUF_POLICY = 15,
2f85a429 774 NET_SCTP_SACK_TIMEOUT = 16,
049b3ff5 775 NET_SCTP_RCVBUF_POLICY = 17,
1da177e4
LT		 776};
777
778/* /proc/sys/net/bridge */
779enum {
780 NET_BRIDGE_NF_CALL_ARPTABLES = 1,
781 NET_BRIDGE_NF_CALL_IPTABLES = 2,
782 NET_BRIDGE_NF_CALL_IP6TABLES = 3,
783 NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
784};
785
1da177e4
LT		 786/* CTL_FS names: */
787enum
788{
789 FS_NRINODE=1, /* int:current number of allocated inodes */
790 FS_STATINODE=2,
791 FS_MAXINODE=3, /* int:maximum number of inodes that can be allocated */
792 FS_NRDQUOT=4, /* int:current number of allocated dquots */
793 FS_MAXDQUOT=5, /* int:maximum number of dquots that can be allocated */
794 FS_NRFILE=6, /* int:current number of allocated filedescriptors */
795 FS_MAXFILE=7, /* int:maximum number of filedescriptors that can be allocated */
796 FS_DENTRY=8,
797 FS_NRSUPER=9, /* int:current number of allocated super_blocks */
798 FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
799 FS_OVERFLOWUID=11, /* int: overflow UID */
800 FS_OVERFLOWGID=12, /* int: overflow GID */
801 FS_LEASES=13, /* int: leases enabled */
802 FS_DIR_NOTIFY=14, /* int: directory notification enabled */
803 FS_LEASE_TIME=15, /* int: maximum time to wait for a lease break */
804 FS_DQSTATS=16, /* disc quota usage statistics and control */
805 FS_XFS=17, /* struct: control xfs parameters */
806 FS_AIO_NR=18, /* current system-wide number of aio requests */
807 FS_AIO_MAX_NR=19, /* system-wide maximum number of aio requests */
0399cb08 808 FS_INOTIFY=20, /* inotify submenu */
1da177e4
LT		 809};
810
811/* /proc/sys/fs/quota/ */
812enum {
813 FS_DQ_LOOKUPS = 1,
814 FS_DQ_DROPS = 2,
815 FS_DQ_READS = 3,
816 FS_DQ_WRITES = 4,
817 FS_DQ_CACHE_HITS = 5,
818 FS_DQ_ALLOCATED = 6,
819 FS_DQ_FREE = 7,
820 FS_DQ_SYNCS = 8,
821 FS_DQ_WARNINGS = 9,
822};
823
824/* CTL_DEBUG names: */
825
826/* CTL_DEV names: */
827enum {
828 DEV_CDROM=1,
829 DEV_HWMON=2,
830 DEV_PARPORT=3,
831 DEV_RAID=4,
832 DEV_MAC_HID=5,
833 DEV_SCSI=6,
8c702e16 834 DEV_IPMI=7,
1da177e4
LT		 835};
836
837/* /proc/sys/dev/cdrom */
838enum {
839 DEV_CDROM_INFO=1,
840 DEV_CDROM_AUTOCLOSE=2,
841 DEV_CDROM_AUTOEJECT=3,
842 DEV_CDROM_DEBUG=4,
843 DEV_CDROM_LOCK=5,
844 DEV_CDROM_CHECK_MEDIA=6
845};
846
847/* /proc/sys/dev/parport */
848enum {
849 DEV_PARPORT_DEFAULT=-3
850};
851
852/* /proc/sys/dev/raid */
853enum {
854 DEV_RAID_SPEED_LIMIT_MIN=1,
855 DEV_RAID_SPEED_LIMIT_MAX=2
856};
857
858/* /proc/sys/dev/parport/default */
859enum {
860 DEV_PARPORT_DEFAULT_TIMESLICE=1,
861 DEV_PARPORT_DEFAULT_SPINTIME=2
862};
863
864/* /proc/sys/dev/parport/parport n */
865enum {
866 DEV_PARPORT_SPINTIME=1,
867 DEV_PARPORT_BASE_ADDR=2,
868 DEV_PARPORT_IRQ=3,
869 DEV_PARPORT_DMA=4,
870 DEV_PARPORT_MODES=5,
871 DEV_PARPORT_DEVICES=6,
872 DEV_PARPORT_AUTOPROBE=16
873};
874
875/* /proc/sys/dev/parport/parport n/devices/ */
876enum {
877 DEV_PARPORT_DEVICES_ACTIVE=-3,
878};
879
880/* /proc/sys/dev/parport/parport n/devices/device n */
881enum {
882 DEV_PARPORT_DEVICE_TIMESLICE=1,
883};
884
885/* /proc/sys/dev/mac_hid */
886enum {
887 DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
888 DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
889 DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
890 DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
891 DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
892 DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
893};
894
895/* /proc/sys/dev/scsi */
896enum {
897 DEV_SCSI_LOGGING_LEVEL=1,
898};
899
8c702e16
CM		 900/* /proc/sys/dev/ipmi */
901enum {
902 DEV_IPMI_POWEROFF_POWERCYCLE=1,
903};
904
1da177e4
LT		 905/* /proc/sys/abi */
906enum
907{
908 ABI_DEFHANDLER_COFF=1, /* default handler for coff binaries */
909 ABI_DEFHANDLER_ELF=2, /* default handler for ELF binaries */
910 ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
911 ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
912 ABI_TRACE=5, /* tracing flags */
913 ABI_FAKE_UTSNAME=6, /* fake target utsname information */
914};
915
916#ifdef __KERNEL__
d4ed803c 917#include <linux/list.h>
1da177e4
LT		 918
919extern void sysctl_init(void);
920
921typedef struct ctl_table ctl_table;
922
923typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,
924 void __user *oldval, size_t __user *oldlenp,
1f29bcd7 925 void __user *newval, size_t newlen);
1da177e4
LT		 926
927typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
928 void __user *buffer, size_t *lenp, loff_t *ppos);
929
930extern int proc_dostring(ctl_table *, int, struct file *,
931 void __user *, size_t *, loff_t *);
932extern int proc_dointvec(ctl_table *, int, struct file *,
933 void __user *, size_t *, loff_t *);
934extern int proc_dointvec_bset(ctl_table *, int, struct file *,
935 void __user *, size_t *, loff_t *);
936extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
937 void __user *, size_t *, loff_t *);
938extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
939 void __user *, size_t *, loff_t *);
940extern int proc_dointvec_userhz_jiffies(ctl_table *, int, struct file *,
941 void __user *, size_t *, loff_t *);
942extern int proc_dointvec_ms_jiffies(ctl_table *, int, struct file *,
943 void __user *, size_t *, loff_t *);
944extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
945 void __user *, size_t *, loff_t *);
946extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
947 struct file *, void __user *, size_t *, loff_t *);
948
949extern int do_sysctl (int __user *name, int nlen,
950 void __user *oldval, size_t __user *oldlenp,
951 void __user *newval, size_t newlen);
952
953extern int do_sysctl_strategy (ctl_table *table,
954 int __user *name, int nlen,
955 void __user *oldval, size_t __user *oldlenp,
1f29bcd7 956 void __user *newval, size_t newlen);
1da177e4
LT		 957
958extern ctl_handler sysctl_string;
959extern ctl_handler sysctl_intvec;
960extern ctl_handler sysctl_jiffies;
961extern ctl_handler sysctl_ms_jiffies;
962
963
964/*
965 * Register a set of sysctl names by calling register_sysctl_table
966 * with an initialised array of ctl_table's. An entry with zero
d99f160a
EB		 967 * ctl_name and NULL procname terminates the table. table->de will be
968 * set up by the registration and need not be initialised in advance.
1da177e4
LT		 969 *
970 * sysctl names can be mirrored automatically under /proc/sys. The
971 * procname supplied controls /proc naming.
972 *
973 * The table's mode will be honoured both for sys_sysctl(2) and
974 * proc-fs access.
975 *
976 * Leaf nodes in the sysctl tree will be represented by a single file
977 * under /proc; non-leaf nodes will be represented by directories. A
978 * null procname disables /proc mirroring at this node.
d99f160a
EB		 979 *
980 * sysctl entries with a zero ctl_name will not be available through
981 * the binary sysctl interface.
982 *
1da177e4
LT		 983 * sysctl(2) can automatically manage read and write requests through
984 * the sysctl table. The data and maxlen fields of the ctl_table
985 * struct enable minimal validation of the values being written to be
986 * performed, and the mode field allows minimal authentication.
987 *
988 * More sophisticated management can be enabled by the provision of a
989 * strategy routine with the table entry. This will be called before
990 * any automatic read or write of the data is performed.
991 *
992 * The strategy routine may return:
993 * <0: Error occurred (error is passed to user process)
994 * 0: OK - proceed with automatic read or write.
995 * >0: OK - read or write has been done by the strategy routine, so
996 * return immediately.
997 *
998 * There must be a proc_handler routine for any terminal nodes
999 * mirrored under /proc/sys (non-terminals are handled by a built-in
1000 * directory handler). Several default handlers are available to
1001 * cover common cases.
1002 */
1003
1004/* A sysctl table is an array of struct ctl_table: */
1005struct ctl_table
1006{
1007 int ctl_name; /* Binary ID */
1008 const char *procname; /* Text ID for /proc/sys, or zero */
1009 void *data;
1010 int maxlen;
1011 mode_t mode;
1012 ctl_table *child;
1013 proc_handler *proc_handler; /* Callback for text formatting */
1014 ctl_handler *strategy; /* Callback function for all r/w */
1015 struct proc_dir_entry *de; /* /proc control block */
1016 void *extra1;
1017 void *extra2;
1018};
1019
1020/* struct ctl_table_header is used to maintain dynamic lists of
1021 ctl_table trees. */
1022struct ctl_table_header
1023{
1024 ctl_table *ctl_table;
1025 struct list_head ctl_entry;
330d57fb
AV		 1026 int used;
1027 struct completion *unregistering;
1da177e4
LT		 1028};
1029
1030struct ctl_table_header * register_sysctl_table(ctl_table * table,
1031 int insert_at_head);
1032void unregister_sysctl_table(struct ctl_table_header * table);
1033
1034#else /* __KERNEL__ */
1035
1036#endif /* __KERNEL__ */
1037
1038#endif /* _LINUX_SYSCTL_H */
Linux 6.x block layer and io_uring tree(s)