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[PATCH] dquot: add proper locking when using current->signal->tty
[usb.git] / include / linux / sysctl.h
blob1b24bd45e0804675646b5628cace0fbed1901ab0
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 KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
154 KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
155 };
156
157
158
159 /* CTL_VM names: */
160 enum
161 {
162 VM_UNUSED1=1, /* was: struct: Set vm swapping control */
163 VM_UNUSED2=2, /* was; int: Linear or sqrt() swapout for hogs */
164 VM_UNUSED3=3, /* was: struct: Set free page thresholds */
165 VM_UNUSED4=4, /* Spare */
166 VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
167 VM_UNUSED5=6, /* was: struct: Set buffer memory thresholds */
168 VM_UNUSED7=7, /* was: struct: Set cache memory thresholds */
169 VM_UNUSED8=8, /* was: struct: Control kswapd behaviour */
170 VM_UNUSED9=9, /* was: struct: Set page table cache parameters */
171 VM_PAGE_CLUSTER=10, /* int: set number of pages to swap together */
172 VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
173 VM_DIRTY_RATIO=12, /* dirty_ratio */
174 VM_DIRTY_WB_CS=13, /* dirty_writeback_centisecs */
175 VM_DIRTY_EXPIRE_CS=14, /* dirty_expire_centisecs */
176 VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
177 VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
178 VM_PAGEBUF=17, /* struct: Control pagebuf parameters */
179 VM_HUGETLB_PAGES=18, /* int: Number of available Huge Pages */
180 VM_SWAPPINESS=19, /* Tendency to steal mapped memory */
181 VM_LOWMEM_RESERVE_RATIO=20,/* reservation ratio for lower memory zones */
182 VM_MIN_FREE_KBYTES=21, /* Minimum free kilobytes to maintain */
183 VM_MAX_MAP_COUNT=22, /* int: Maximum number of mmaps/address-space */
184 VM_LAPTOP_MODE=23, /* vm laptop mode */
185 VM_BLOCK_DUMP=24, /* block dump mode */
186 VM_HUGETLB_GROUP=25, /* permitted hugetlb group */
187 VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
188 VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
189 VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
190 VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */
191 VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */
192 VM_ZONE_RECLAIM_MODE=31, /* reclaim local zone memory before going off node */
193 VM_MIN_UNMAPPED=32, /* Set min percent of unmapped pages */
194 VM_PANIC_ON_OOM=33, /* panic at out-of-memory */
195 VM_VDSO_ENABLED=34, /* map VDSO into new processes? */
196 VM_MIN_SLAB=35, /* Percent pages ignored by zone reclaim */
197 };
198
199
200 /* CTL_NET names: */
201 enum
202 {
203 NET_CORE=1,
204 NET_ETHER=2,
205 NET_802=3,
206 NET_UNIX=4,
207 NET_IPV4=5,
208 NET_IPX=6,
209 NET_ATALK=7,
210 NET_NETROM=8,
211 NET_AX25=9,
212 NET_BRIDGE=10,
213 NET_ROSE=11,
214 NET_IPV6=12,
215 NET_X25=13,
216 NET_TR=14,
217 NET_DECNET=15,
218 NET_ECONET=16,
219 NET_SCTP=17,
220 NET_LLC=18,
221 NET_NETFILTER=19,
222 NET_DCCP=20,
223 };
224
225 /* /proc/sys/kernel/random */
226 enum
227 {
228 RANDOM_POOLSIZE=1,
229 RANDOM_ENTROPY_COUNT=2,
230 RANDOM_READ_THRESH=3,
231 RANDOM_WRITE_THRESH=4,
232 RANDOM_BOOT_ID=5,
233 RANDOM_UUID=6
234 };
235
236 /* /proc/sys/kernel/pty */
237 enum
238 {
239 PTY_MAX=1,
240 PTY_NR=2
241 };
242
243 /* /proc/sys/bus/isa */
244 enum
245 {
246 BUS_ISA_MEM_BASE=1,
247 BUS_ISA_PORT_BASE=2,
248 BUS_ISA_PORT_SHIFT=3
249 };
250
251 /* /proc/sys/net/core */
252 enum
253 {
254 NET_CORE_WMEM_MAX=1,
255 NET_CORE_RMEM_MAX=2,
256 NET_CORE_WMEM_DEFAULT=3,
257 NET_CORE_RMEM_DEFAULT=4,
258 /* was NET_CORE_DESTROY_DELAY */
259 NET_CORE_MAX_BACKLOG=6,
260 NET_CORE_FASTROUTE=7,
261 NET_CORE_MSG_COST=8,
262 NET_CORE_MSG_BURST=9,
263 NET_CORE_OPTMEM_MAX=10,
264 NET_CORE_HOT_LIST_LENGTH=11,
265 NET_CORE_DIVERT_VERSION=12,
266 NET_CORE_NO_CONG_THRESH=13,
267 NET_CORE_NO_CONG=14,
268 NET_CORE_LO_CONG=15,
269 NET_CORE_MOD_CONG=16,
270 NET_CORE_DEV_WEIGHT=17,
271 NET_CORE_SOMAXCONN=18,
272 NET_CORE_BUDGET=19,
273 NET_CORE_AEVENT_ETIME=20,
274 NET_CORE_AEVENT_RSEQTH=21,
275 };
276
277 /* /proc/sys/net/ethernet */
278
279 /* /proc/sys/net/802 */
280
281 /* /proc/sys/net/unix */
282
283 enum
284 {
285 NET_UNIX_DESTROY_DELAY=1,
286 NET_UNIX_DELETE_DELAY=2,
287 NET_UNIX_MAX_DGRAM_QLEN=3,
288 };
289
290 /* /proc/sys/net/netfilter */
291 enum
292 {
293 NET_NF_CONNTRACK_MAX=1,
294 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
295 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
296 NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
297 NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
298 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
299 NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
300 NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
301 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
302 NET_NF_CONNTRACK_UDP_TIMEOUT=10,
303 NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
304 NET_NF_CONNTRACK_ICMP_TIMEOUT=12,
305 NET_NF_CONNTRACK_GENERIC_TIMEOUT=13,
306 NET_NF_CONNTRACK_BUCKETS=14,
307 NET_NF_CONNTRACK_LOG_INVALID=15,
308 NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
309 NET_NF_CONNTRACK_TCP_LOOSE=17,
310 NET_NF_CONNTRACK_TCP_BE_LIBERAL=18,
311 NET_NF_CONNTRACK_TCP_MAX_RETRANS=19,
312 NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
313 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
314 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
315 NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
316 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
317 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
318 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
319 NET_NF_CONNTRACK_COUNT=27,
320 NET_NF_CONNTRACK_ICMPV6_TIMEOUT=28,
321 NET_NF_CONNTRACK_FRAG6_TIMEOUT=29,
322 NET_NF_CONNTRACK_FRAG6_LOW_THRESH=30,
323 NET_NF_CONNTRACK_FRAG6_HIGH_THRESH=31,
324 NET_NF_CONNTRACK_CHECKSUM=32,
325 };
326
327 /* /proc/sys/net/ipv4 */
328 enum
329 {
330 /* v2.0 compatibile variables */
331 NET_IPV4_FORWARD=8,
332 NET_IPV4_DYNADDR=9,
333
334 NET_IPV4_CONF=16,
335 NET_IPV4_NEIGH=17,
336 NET_IPV4_ROUTE=18,
337 NET_IPV4_FIB_HASH=19,
338 NET_IPV4_NETFILTER=20,
339
340 NET_IPV4_TCP_TIMESTAMPS=33,
341 NET_IPV4_TCP_WINDOW_SCALING=34,
342 NET_IPV4_TCP_SACK=35,
343 NET_IPV4_TCP_RETRANS_COLLAPSE=36,
344 NET_IPV4_DEFAULT_TTL=37,
345 NET_IPV4_AUTOCONFIG=38,
346 NET_IPV4_NO_PMTU_DISC=39,
347 NET_IPV4_TCP_SYN_RETRIES=40,
348 NET_IPV4_IPFRAG_HIGH_THRESH=41,
349 NET_IPV4_IPFRAG_LOW_THRESH=42,
350 NET_IPV4_IPFRAG_TIME=43,
351 NET_IPV4_TCP_MAX_KA_PROBES=44,
352 NET_IPV4_TCP_KEEPALIVE_TIME=45,
353 NET_IPV4_TCP_KEEPALIVE_PROBES=46,
354 NET_IPV4_TCP_RETRIES1=47,
355 NET_IPV4_TCP_RETRIES2=48,
356 NET_IPV4_TCP_FIN_TIMEOUT=49,
357 NET_IPV4_IP_MASQ_DEBUG=50,
358 NET_TCP_SYNCOOKIES=51,
359 NET_TCP_STDURG=52,
360 NET_TCP_RFC1337=53,
361 NET_TCP_SYN_TAILDROP=54,
362 NET_TCP_MAX_SYN_BACKLOG=55,
363 NET_IPV4_LOCAL_PORT_RANGE=56,
364 NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
365 NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
366 NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
367 NET_IPV4_ICMP_DESTUNREACH_RATE=60,
368 NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
369 NET_IPV4_ICMP_PARAMPROB_RATE=62,
370 NET_IPV4_ICMP_ECHOREPLY_RATE=63,
371 NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
372 NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
373 NET_TCP_TW_RECYCLE=66,
374 NET_IPV4_ALWAYS_DEFRAG=67,
375 NET_IPV4_TCP_KEEPALIVE_INTVL=68,
376 NET_IPV4_INET_PEER_THRESHOLD=69,
377 NET_IPV4_INET_PEER_MINTTL=70,
378 NET_IPV4_INET_PEER_MAXTTL=71,
379 NET_IPV4_INET_PEER_GC_MINTIME=72,
380 NET_IPV4_INET_PEER_GC_MAXTIME=73,
381 NET_TCP_ORPHAN_RETRIES=74,
382 NET_TCP_ABORT_ON_OVERFLOW=75,
383 NET_TCP_SYNACK_RETRIES=76,
384 NET_TCP_MAX_ORPHANS=77,
385 NET_TCP_MAX_TW_BUCKETS=78,
386 NET_TCP_FACK=79,
387 NET_TCP_REORDERING=80,
388 NET_TCP_ECN=81,
389 NET_TCP_DSACK=82,
390 NET_TCP_MEM=83,
391 NET_TCP_WMEM=84,
392 NET_TCP_RMEM=85,
393 NET_TCP_APP_WIN=86,
394 NET_TCP_ADV_WIN_SCALE=87,
395 NET_IPV4_NONLOCAL_BIND=88,
396 NET_IPV4_ICMP_RATELIMIT=89,
397 NET_IPV4_ICMP_RATEMASK=90,
398 NET_TCP_TW_REUSE=91,
399 NET_TCP_FRTO=92,
400 NET_TCP_LOW_LATENCY=93,
401 NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
402 NET_IPV4_IGMP_MAX_MSF=96,
403 NET_TCP_NO_METRICS_SAVE=97,
404 NET_TCP_DEFAULT_WIN_SCALE=105,
405 NET_TCP_MODERATE_RCVBUF=106,
406 NET_TCP_TSO_WIN_DIVISOR=107,
407 NET_TCP_BIC_BETA=108,
408 NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR=109,
409 NET_TCP_CONG_CONTROL=110,
410 NET_TCP_ABC=111,
411 NET_IPV4_IPFRAG_MAX_DIST=112,
412 NET_TCP_MTU_PROBING=113,
413 NET_TCP_BASE_MSS=114,
414 NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS=115,
415 NET_TCP_DMA_COPYBREAK=116,
416 NET_TCP_SLOW_START_AFTER_IDLE=117,
417 NET_CIPSOV4_CACHE_ENABLE=118,
418 NET_CIPSOV4_CACHE_BUCKET_SIZE=119,
419 NET_CIPSOV4_RBM_OPTFMT=120,
420 NET_CIPSOV4_RBM_STRICTVALID=121,
421 };
422
423 enum {
424 NET_IPV4_ROUTE_FLUSH=1,
425 NET_IPV4_ROUTE_MIN_DELAY=2,
426 NET_IPV4_ROUTE_MAX_DELAY=3,
427 NET_IPV4_ROUTE_GC_THRESH=4,
428 NET_IPV4_ROUTE_MAX_SIZE=5,
429 NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
430 NET_IPV4_ROUTE_GC_TIMEOUT=7,
431 NET_IPV4_ROUTE_GC_INTERVAL=8,
432 NET_IPV4_ROUTE_REDIRECT_LOAD=9,
433 NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
434 NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
435 NET_IPV4_ROUTE_ERROR_COST=12,
436 NET_IPV4_ROUTE_ERROR_BURST=13,
437 NET_IPV4_ROUTE_GC_ELASTICITY=14,
438 NET_IPV4_ROUTE_MTU_EXPIRES=15,
439 NET_IPV4_ROUTE_MIN_PMTU=16,
440 NET_IPV4_ROUTE_MIN_ADVMSS=17,
441 NET_IPV4_ROUTE_SECRET_INTERVAL=18,
442 NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS=19,
443 };
444
445 enum
446 {
447 NET_PROTO_CONF_ALL=-2,
448 NET_PROTO_CONF_DEFAULT=-3
449
450 /* And device ifindices ... */
451 };
452
453 enum
454 {
455 NET_IPV4_CONF_FORWARDING=1,
456 NET_IPV4_CONF_MC_FORWARDING=2,
457 NET_IPV4_CONF_PROXY_ARP=3,
458 NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
459 NET_IPV4_CONF_SECURE_REDIRECTS=5,
460 NET_IPV4_CONF_SEND_REDIRECTS=6,
461 NET_IPV4_CONF_SHARED_MEDIA=7,
462 NET_IPV4_CONF_RP_FILTER=8,
463 NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
464 NET_IPV4_CONF_BOOTP_RELAY=10,
465 NET_IPV4_CONF_LOG_MARTIANS=11,
466 NET_IPV4_CONF_TAG=12,
467 NET_IPV4_CONF_ARPFILTER=13,
468 NET_IPV4_CONF_MEDIUM_ID=14,
469 NET_IPV4_CONF_NOXFRM=15,
470 NET_IPV4_CONF_NOPOLICY=16,
471 NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
472 NET_IPV4_CONF_ARP_ANNOUNCE=18,
473 NET_IPV4_CONF_ARP_IGNORE=19,
474 NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
475 NET_IPV4_CONF_ARP_ACCEPT=21,
476 __NET_IPV4_CONF_MAX
477 };
478
479 /* /proc/sys/net/ipv4/netfilter */
480 enum
481 {
482 NET_IPV4_NF_CONNTRACK_MAX=1,
483 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
484 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
485 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
486 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
487 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
488 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
489 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
490 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
491 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
492 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
493 NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
494 NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
495 NET_IPV4_NF_CONNTRACK_BUCKETS=14,
496 NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
497 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
498 NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
499 NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
500 NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
501 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
502 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
503 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
504 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
505 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
506 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
507 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
508 NET_IPV4_NF_CONNTRACK_COUNT=27,
509 NET_IPV4_NF_CONNTRACK_CHECKSUM=28,
510 };
511
512 /* /proc/sys/net/ipv6 */
513 enum {
514 NET_IPV6_CONF=16,
515 NET_IPV6_NEIGH=17,
516 NET_IPV6_ROUTE=18,
517 NET_IPV6_ICMP=19,
518 NET_IPV6_BINDV6ONLY=20,
519 NET_IPV6_IP6FRAG_HIGH_THRESH=21,
520 NET_IPV6_IP6FRAG_LOW_THRESH=22,
521 NET_IPV6_IP6FRAG_TIME=23,
522 NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
523 NET_IPV6_MLD_MAX_MSF=25,
524 };
525
526 enum {
527 NET_IPV6_ROUTE_FLUSH=1,
528 NET_IPV6_ROUTE_GC_THRESH=2,
529 NET_IPV6_ROUTE_MAX_SIZE=3,
530 NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
531 NET_IPV6_ROUTE_GC_TIMEOUT=5,
532 NET_IPV6_ROUTE_GC_INTERVAL=6,
533 NET_IPV6_ROUTE_GC_ELASTICITY=7,
534 NET_IPV6_ROUTE_MTU_EXPIRES=8,
535 NET_IPV6_ROUTE_MIN_ADVMSS=9,
536 NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS=10
537 };
538
539 enum {
540 NET_IPV6_FORWARDING=1,
541 NET_IPV6_HOP_LIMIT=2,
542 NET_IPV6_MTU=3,
543 NET_IPV6_ACCEPT_RA=4,
544 NET_IPV6_ACCEPT_REDIRECTS=5,
545 NET_IPV6_AUTOCONF=6,
546 NET_IPV6_DAD_TRANSMITS=7,
547 NET_IPV6_RTR_SOLICITS=8,
548 NET_IPV6_RTR_SOLICIT_INTERVAL=9,
549 NET_IPV6_RTR_SOLICIT_DELAY=10,
550 NET_IPV6_USE_TEMPADDR=11,
551 NET_IPV6_TEMP_VALID_LFT=12,
552 NET_IPV6_TEMP_PREFERED_LFT=13,
553 NET_IPV6_REGEN_MAX_RETRY=14,
554 NET_IPV6_MAX_DESYNC_FACTOR=15,
555 NET_IPV6_MAX_ADDRESSES=16,
556 NET_IPV6_FORCE_MLD_VERSION=17,
557 NET_IPV6_ACCEPT_RA_DEFRTR=18,
558 NET_IPV6_ACCEPT_RA_PINFO=19,
559 NET_IPV6_ACCEPT_RA_RTR_PREF=20,
560 NET_IPV6_RTR_PROBE_INTERVAL=21,
561 NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
562 NET_IPV6_PROXY_NDP=23,
563 __NET_IPV6_MAX
564 };
565
566 /* /proc/sys/net/ipv6/icmp */
567 enum {
568 NET_IPV6_ICMP_RATELIMIT=1
569 };
570
571 /* /proc/sys/net/<protocol>/neigh/<dev> */
572 enum {
573 NET_NEIGH_MCAST_SOLICIT=1,
574 NET_NEIGH_UCAST_SOLICIT=2,
575 NET_NEIGH_APP_SOLICIT=3,
576 NET_NEIGH_RETRANS_TIME=4,
577 NET_NEIGH_REACHABLE_TIME=5,
578 NET_NEIGH_DELAY_PROBE_TIME=6,
579 NET_NEIGH_GC_STALE_TIME=7,
580 NET_NEIGH_UNRES_QLEN=8,
581 NET_NEIGH_PROXY_QLEN=9,
582 NET_NEIGH_ANYCAST_DELAY=10,
583 NET_NEIGH_PROXY_DELAY=11,
584 NET_NEIGH_LOCKTIME=12,
585 NET_NEIGH_GC_INTERVAL=13,
586 NET_NEIGH_GC_THRESH1=14,
587 NET_NEIGH_GC_THRESH2=15,
588 NET_NEIGH_GC_THRESH3=16,
589 NET_NEIGH_RETRANS_TIME_MS=17,
590 NET_NEIGH_REACHABLE_TIME_MS=18,
591 __NET_NEIGH_MAX
592 };
593
594 /* /proc/sys/net/dccp */
595 enum {
596 NET_DCCP_DEFAULT=1,
597 };
598
599 /* /proc/sys/net/dccp/default */
600 enum {
601 NET_DCCP_DEFAULT_SEQ_WINDOW = 1,
602 NET_DCCP_DEFAULT_RX_CCID = 2,
603 NET_DCCP_DEFAULT_TX_CCID = 3,
604 NET_DCCP_DEFAULT_ACK_RATIO = 4,
605 NET_DCCP_DEFAULT_SEND_ACKVEC = 5,
606 NET_DCCP_DEFAULT_SEND_NDP = 6,
607 };
608
609 /* /proc/sys/net/ipx */
610 enum {
611 NET_IPX_PPROP_BROADCASTING=1,
612 NET_IPX_FORWARDING=2
613 };
614
615 /* /proc/sys/net/llc */
616 enum {
617 NET_LLC2=1,
618 NET_LLC_STATION=2,
619 };
620
621 /* /proc/sys/net/llc/llc2 */
622 enum {
623 NET_LLC2_TIMEOUT=1,
624 };
625
626 /* /proc/sys/net/llc/station */
627 enum {
628 NET_LLC_STATION_ACK_TIMEOUT=1,
629 };
630
631 /* /proc/sys/net/llc/llc2/timeout */
632 enum {
633 NET_LLC2_ACK_TIMEOUT=1,
634 NET_LLC2_P_TIMEOUT=2,
635 NET_LLC2_REJ_TIMEOUT=3,
636 NET_LLC2_BUSY_TIMEOUT=4,
637 };
638
639 /* /proc/sys/net/appletalk */
640 enum {
641 NET_ATALK_AARP_EXPIRY_TIME=1,
642 NET_ATALK_AARP_TICK_TIME=2,
643 NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
644 NET_ATALK_AARP_RESOLVE_TIME=4
645 };
646
647
648 /* /proc/sys/net/netrom */
649 enum {
650 NET_NETROM_DEFAULT_PATH_QUALITY=1,
651 NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
652 NET_NETROM_NETWORK_TTL_INITIALISER=3,
653 NET_NETROM_TRANSPORT_TIMEOUT=4,
654 NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
655 NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
656 NET_NETROM_TRANSPORT_BUSY_DELAY=7,
657 NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
658 NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
659 NET_NETROM_ROUTING_CONTROL=10,
660 NET_NETROM_LINK_FAILS_COUNT=11,
661 NET_NETROM_RESET=12
662 };
663
664 /* /proc/sys/net/ax25 */
665 enum {
666 NET_AX25_IP_DEFAULT_MODE=1,
667 NET_AX25_DEFAULT_MODE=2,
668 NET_AX25_BACKOFF_TYPE=3,
669 NET_AX25_CONNECT_MODE=4,
670 NET_AX25_STANDARD_WINDOW=5,
671 NET_AX25_EXTENDED_WINDOW=6,
672 NET_AX25_T1_TIMEOUT=7,
673 NET_AX25_T2_TIMEOUT=8,
674 NET_AX25_T3_TIMEOUT=9,
675 NET_AX25_IDLE_TIMEOUT=10,
676 NET_AX25_N2=11,
677 NET_AX25_PACLEN=12,
678 NET_AX25_PROTOCOL=13,
679 NET_AX25_DAMA_SLAVE_TIMEOUT=14
680 };
681
682 /* /proc/sys/net/rose */
683 enum {
684 NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
685 NET_ROSE_CALL_REQUEST_TIMEOUT=2,
686 NET_ROSE_RESET_REQUEST_TIMEOUT=3,
687 NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
688 NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
689 NET_ROSE_ROUTING_CONTROL=6,
690 NET_ROSE_LINK_FAIL_TIMEOUT=7,
691 NET_ROSE_MAX_VCS=8,
692 NET_ROSE_WINDOW_SIZE=9,
693 NET_ROSE_NO_ACTIVITY_TIMEOUT=10
694 };
695
696 /* /proc/sys/net/x25 */
697 enum {
698 NET_X25_RESTART_REQUEST_TIMEOUT=1,
699 NET_X25_CALL_REQUEST_TIMEOUT=2,
700 NET_X25_RESET_REQUEST_TIMEOUT=3,
701 NET_X25_CLEAR_REQUEST_TIMEOUT=4,
702 NET_X25_ACK_HOLD_BACK_TIMEOUT=5
703 };
704
705 /* /proc/sys/net/token-ring */
706 enum
707 {
708 NET_TR_RIF_TIMEOUT=1
709 };
710
711 /* /proc/sys/net/decnet/ */
712 enum {
713 NET_DECNET_NODE_TYPE = 1,
714 NET_DECNET_NODE_ADDRESS = 2,
715 NET_DECNET_NODE_NAME = 3,
716 NET_DECNET_DEFAULT_DEVICE = 4,
717 NET_DECNET_TIME_WAIT = 5,
718 NET_DECNET_DN_COUNT = 6,
719 NET_DECNET_DI_COUNT = 7,
720 NET_DECNET_DR_COUNT = 8,
721 NET_DECNET_DST_GC_INTERVAL = 9,
722 NET_DECNET_CONF = 10,
723 NET_DECNET_NO_FC_MAX_CWND = 11,
724 NET_DECNET_MEM = 12,
725 NET_DECNET_RMEM = 13,
726 NET_DECNET_WMEM = 14,
727 NET_DECNET_DEBUG_LEVEL = 255
728 };
729
730 /* /proc/sys/net/decnet/conf/<dev> */
731 enum {
732 NET_DECNET_CONF_LOOPBACK = -2,
733 NET_DECNET_CONF_DDCMP = -3,
734 NET_DECNET_CONF_PPP = -4,
735 NET_DECNET_CONF_X25 = -5,
736 NET_DECNET_CONF_GRE = -6,
737 NET_DECNET_CONF_ETHER = -7
738
739 /* ... and ifindex of devices */
740 };
741
742 /* /proc/sys/net/decnet/conf/<dev>/ */
743 enum {
744 NET_DECNET_CONF_DEV_PRIORITY = 1,
745 NET_DECNET_CONF_DEV_T1 = 2,
746 NET_DECNET_CONF_DEV_T2 = 3,
747 NET_DECNET_CONF_DEV_T3 = 4,
748 NET_DECNET_CONF_DEV_FORWARDING = 5,
749 NET_DECNET_CONF_DEV_BLKSIZE = 6,
750 NET_DECNET_CONF_DEV_STATE = 7
751 };
752
753 /* /proc/sys/net/sctp */
754 enum {
755 NET_SCTP_RTO_INITIAL = 1,
756 NET_SCTP_RTO_MIN = 2,
757 NET_SCTP_RTO_MAX = 3,
758 NET_SCTP_RTO_ALPHA = 4,
759 NET_SCTP_RTO_BETA = 5,
760 NET_SCTP_VALID_COOKIE_LIFE = 6,
761 NET_SCTP_ASSOCIATION_MAX_RETRANS = 7,
762 NET_SCTP_PATH_MAX_RETRANS = 8,
763 NET_SCTP_MAX_INIT_RETRANSMITS = 9,
764 NET_SCTP_HB_INTERVAL = 10,
765 NET_SCTP_PRESERVE_ENABLE = 11,
766 NET_SCTP_MAX_BURST = 12,
767 NET_SCTP_ADDIP_ENABLE = 13,
768 NET_SCTP_PRSCTP_ENABLE = 14,
769 NET_SCTP_SNDBUF_POLICY = 15,
770 NET_SCTP_SACK_TIMEOUT = 16,
771 NET_SCTP_RCVBUF_POLICY = 17,
772 };
773
774 /* /proc/sys/net/bridge */
775 enum {
776 NET_BRIDGE_NF_CALL_ARPTABLES = 1,
777 NET_BRIDGE_NF_CALL_IPTABLES = 2,
778 NET_BRIDGE_NF_CALL_IP6TABLES = 3,
779 NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
780 };
781
782 /* CTL_FS names: */
783 enum
784 {
785 FS_NRINODE=1, /* int:current number of allocated inodes */
786 FS_STATINODE=2,
787 FS_MAXINODE=3, /* int:maximum number of inodes that can be allocated */
788 FS_NRDQUOT=4, /* int:current number of allocated dquots */
789 FS_MAXDQUOT=5, /* int:maximum number of dquots that can be allocated */
790 FS_NRFILE=6, /* int:current number of allocated filedescriptors */
791 FS_MAXFILE=7, /* int:maximum number of filedescriptors that can be allocated */
792 FS_DENTRY=8,
793 FS_NRSUPER=9, /* int:current number of allocated super_blocks */
794 FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
795 FS_OVERFLOWUID=11, /* int: overflow UID */
796 FS_OVERFLOWGID=12, /* int: overflow GID */
797 FS_LEASES=13, /* int: leases enabled */
798 FS_DIR_NOTIFY=14, /* int: directory notification enabled */
799 FS_LEASE_TIME=15, /* int: maximum time to wait for a lease break */
800 FS_DQSTATS=16, /* disc quota usage statistics and control */
801 FS_XFS=17, /* struct: control xfs parameters */
802 FS_AIO_NR=18, /* current system-wide number of aio requests */
803 FS_AIO_MAX_NR=19, /* system-wide maximum number of aio requests */
804 FS_INOTIFY=20, /* inotify submenu */
805 };
806
807 /* /proc/sys/fs/quota/ */
808 enum {
809 FS_DQ_LOOKUPS = 1,
810 FS_DQ_DROPS = 2,
811 FS_DQ_READS = 3,
812 FS_DQ_WRITES = 4,
813 FS_DQ_CACHE_HITS = 5,
814 FS_DQ_ALLOCATED = 6,
815 FS_DQ_FREE = 7,
816 FS_DQ_SYNCS = 8,
817 FS_DQ_WARNINGS = 9,
818 };
819
820 /* CTL_DEBUG names: */
821
822 /* CTL_DEV names: */
823 enum {
824 DEV_CDROM=1,
825 DEV_HWMON=2,
826 DEV_PARPORT=3,
827 DEV_RAID=4,
828 DEV_MAC_HID=5,
829 DEV_SCSI=6,
830 DEV_IPMI=7,
831 };
832
833 /* /proc/sys/dev/cdrom */
834 enum {
835 DEV_CDROM_INFO=1,
836 DEV_CDROM_AUTOCLOSE=2,
837 DEV_CDROM_AUTOEJECT=3,
838 DEV_CDROM_DEBUG=4,
839 DEV_CDROM_LOCK=5,
840 DEV_CDROM_CHECK_MEDIA=6
841 };
842
843 /* /proc/sys/dev/parport */
844 enum {
845 DEV_PARPORT_DEFAULT=-3
846 };
847
848 /* /proc/sys/dev/raid */
849 enum {
850 DEV_RAID_SPEED_LIMIT_MIN=1,
851 DEV_RAID_SPEED_LIMIT_MAX=2
852 };
853
854 /* /proc/sys/dev/parport/default */
855 enum {
856 DEV_PARPORT_DEFAULT_TIMESLICE=1,
857 DEV_PARPORT_DEFAULT_SPINTIME=2
858 };
859
860 /* /proc/sys/dev/parport/parport n */
861 enum {
862 DEV_PARPORT_SPINTIME=1,
863 DEV_PARPORT_BASE_ADDR=2,
864 DEV_PARPORT_IRQ=3,
865 DEV_PARPORT_DMA=4,
866 DEV_PARPORT_MODES=5,
867 DEV_PARPORT_DEVICES=6,
868 DEV_PARPORT_AUTOPROBE=16
869 };
870
871 /* /proc/sys/dev/parport/parport n/devices/ */
872 enum {
873 DEV_PARPORT_DEVICES_ACTIVE=-3,
874 };
875
876 /* /proc/sys/dev/parport/parport n/devices/device n */
877 enum {
878 DEV_PARPORT_DEVICE_TIMESLICE=1,
879 };
880
881 /* /proc/sys/dev/mac_hid */
882 enum {
883 DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
884 DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
885 DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
886 DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
887 DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
888 DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
889 };
890
891 /* /proc/sys/dev/scsi */
892 enum {
893 DEV_SCSI_LOGGING_LEVEL=1,
894 };
895
896 /* /proc/sys/dev/ipmi */
897 enum {
898 DEV_IPMI_POWEROFF_POWERCYCLE=1,
899 };
900
901 /* /proc/sys/abi */
902 enum
903 {
904 ABI_DEFHANDLER_COFF=1, /* default handler for coff binaries */
905 ABI_DEFHANDLER_ELF=2, /* default handler for ELF binaries */
906 ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
907 ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
908 ABI_TRACE=5, /* tracing flags */
909 ABI_FAKE_UTSNAME=6, /* fake target utsname information */
910 };
911
912 #ifdef __KERNEL__
913 #include <linux/list.h>
914
915 extern void sysctl_init(void);
916
917 typedef struct ctl_table ctl_table;
918
919 typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,
920 void __user *oldval, size_t __user *oldlenp,
921 void __user *newval, size_t newlen,
922 void **context);
923
924 typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
925 void __user *buffer, size_t *lenp, loff_t *ppos);
926
927 extern int proc_dostring(ctl_table *, int, struct file *,
928 void __user *, size_t *, loff_t *);
929 extern int proc_dointvec(ctl_table *, int, struct file *,
930 void __user *, size_t *, loff_t *);
931 extern int proc_dointvec_bset(ctl_table *, int, struct file *,
932 void __user *, size_t *, loff_t *);
933 extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
934 void __user *, size_t *, loff_t *);
935 extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
936 void __user *, size_t *, loff_t *);
937 extern int proc_dointvec_userhz_jiffies(ctl_table *, int, struct file *,
938 void __user *, size_t *, loff_t *);
939 extern int proc_dointvec_ms_jiffies(ctl_table *, int, struct file *,
940 void __user *, size_t *, loff_t *);
941 extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
942 void __user *, size_t *, loff_t *);
943 extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
944 struct file *, void __user *, size_t *, loff_t *);
945
946 extern int do_sysctl (int __user *name, int nlen,
947 void __user *oldval, size_t __user *oldlenp,
948 void __user *newval, size_t newlen);
949
950 extern int do_sysctl_strategy (ctl_table *table,
951 int __user *name, int nlen,
952 void __user *oldval, size_t __user *oldlenp,
953 void __user *newval, size_t newlen, void ** context);
954
955 extern ctl_handler sysctl_string;
956 extern ctl_handler sysctl_intvec;
957 extern ctl_handler sysctl_jiffies;
958 extern ctl_handler sysctl_ms_jiffies;
959
960
961 /*
962 * Register a set of sysctl names by calling register_sysctl_table
963 * with an initialised array of ctl_table's. An entry with zero
964 * ctl_name terminates the table. table->de will be set up by the
965 * registration and need not be initialised in advance.
966 *
967 * sysctl names can be mirrored automatically under /proc/sys. The
968 * procname supplied controls /proc naming.
969 *
970 * The table's mode will be honoured both for sys_sysctl(2) and
971 * proc-fs access.
972 *
973 * Leaf nodes in the sysctl tree will be represented by a single file
974 * under /proc; non-leaf nodes will be represented by directories. A
975 * null procname disables /proc mirroring at this node.
976 *
977 * sysctl(2) can automatically manage read and write requests through
978 * the sysctl table. The data and maxlen fields of the ctl_table
979 * struct enable minimal validation of the values being written to be
980 * performed, and the mode field allows minimal authentication.
981 *
982 * More sophisticated management can be enabled by the provision of a
983 * strategy routine with the table entry. This will be called before
984 * any automatic read or write of the data is performed.
985 *
986 * The strategy routine may return:
987 * <0: Error occurred (error is passed to user process)
988 * 0: OK - proceed with automatic read or write.
989 * >0: OK - read or write has been done by the strategy routine, so
990 * return immediately.
991 *
992 * There must be a proc_handler routine for any terminal nodes
993 * mirrored under /proc/sys (non-terminals are handled by a built-in
994 * directory handler). Several default handlers are available to
995 * cover common cases.
996 */
997
998 /* A sysctl table is an array of struct ctl_table: */
999 struct ctl_table
1000 {
1001 int ctl_name; /* Binary ID */
1002 const char *procname; /* Text ID for /proc/sys, or zero */
1003 void *data;
1004 int maxlen;
1005 mode_t mode;
1006 ctl_table *child;
1007 proc_handler *proc_handler; /* Callback for text formatting */
1008 ctl_handler *strategy; /* Callback function for all r/w */
1009 struct proc_dir_entry *de; /* /proc control block */
1010 void *extra1;
1011 void *extra2;
1012 };
1013
1014 /* struct ctl_table_header is used to maintain dynamic lists of
1015 ctl_table trees. */
1016 struct ctl_table_header
1017 {
1018 ctl_table *ctl_table;
1019 struct list_head ctl_entry;
1020 int used;
1021 struct completion *unregistering;
1022 };
1023
1024 struct ctl_table_header * register_sysctl_table(ctl_table * table,
1025 int insert_at_head);
1026 void unregister_sysctl_table(struct ctl_table_header * table);
1027
1028 #else /* __KERNEL__ */
1029
1030 #endif /* __KERNEL__ */
1031
1032 #endif /* _LINUX_SYSCTL_H */
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