1 /*
2 * sysctl.h: General linux system control interface
3 *
4 * Begun 24 March 1995, Stephen Tweedie
5 *
6 ****************************************************************
7 ****************************************************************
8 **
9 ** WARNING:
10 ** The values in this file are exported to user space via
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
14 ** redefine an existing interface, use a new number for it.
15 ** The kernel will then return -ENOTDIR to any application using
16 ** the old binary interface.
17 **
18 ****************************************************************
19 ****************************************************************
20 */
21
22 #ifndef _LINUX_SYSCTL_H
23 #define _LINUX_SYSCTL_H
24
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/compiler.h>
28
29 struct completion;
30
31 #define CTL_MAXNAME 10 /* how many path components do we allow in a
32 call to sysctl? In other words, what is
33 the largest acceptable value for the nlen
34 member of a struct __sysctl_args to have? */
35
36 struct __sysctl_args {
37 int __user *name;
38 int nlen;
39 void __user *oldval;
40 size_t __user *oldlenp;
41 void __user *newval;
42 size_t newlen;
43 unsigned long __unused[4];
44 };
45
46 /* Define sysctl names first */
47
48 /* Top-level names: */
49
50 enum
51 {
52 CTL_KERN=1, /* General kernel info and control */
53 CTL_VM=2, /* VM management */
54 CTL_NET=3, /* Networking */
55 CTL_PROC=4, /* removal breaks strace(1) compilation */
56 CTL_FS=5, /* Filesystems */
57 CTL_DEBUG=6, /* Debugging */
58 CTL_DEV=7, /* Devices */
59 CTL_BUS=8, /* Busses */
60 CTL_ABI=9, /* Binary emulation */
61 CTL_CPU=10, /* CPU stuff (speed scaling, etc) */
62 CTL_ARLAN=254, /* arlan wireless driver */
63 CTL_S390DBF=5677, /* s390 debug */
64 CTL_SUNRPC=7249, /* sunrpc debug */
65 CTL_PM=9899, /* frv power management */
66 CTL_FRV=9898, /* frv specific sysctls */
67 };
68
69 /* CTL_BUS names: */
70 enum
71 {
72 CTL_BUS_ISA=1 /* ISA */
73 };
74
75 /* /proc/sys/fs/inotify/ */
76 enum
77 {
78 INOTIFY_MAX_USER_INSTANCES=1, /* max instances per user */
79 INOTIFY_MAX_USER_WATCHES=2, /* max watches per user */
80 INOTIFY_MAX_QUEUED_EVENTS=3 /* max queued events per instance */
81 };
82
83 /* CTL_KERN names: */
84 enum
85 {
86 KERN_OSTYPE=1, /* string: system version */
87 KERN_OSRELEASE=2, /* string: system release */
88 KERN_OSREV=3, /* int: system revision */
89 KERN_VERSION=4, /* string: compile time info */
90 KERN_SECUREMASK=5, /* struct: maximum rights mask */
91 KERN_PROF=6, /* table: profiling information */
92 KERN_NODENAME=7, /* string: hostname */
93 KERN_DOMAINNAME=8, /* string: domainname */
94
95 KERN_PANIC=15, /* int: panic timeout */
96 KERN_REALROOTDEV=16, /* real root device to mount after initrd */
97
98 KERN_SPARC_REBOOT=21, /* reboot command on Sparc */
99 KERN_CTLALTDEL=22, /* int: allow ctl-alt-del to reboot */
100 KERN_PRINTK=23, /* struct: control printk logging parameters */
101 KERN_NAMETRANS=24, /* Name translation */
102 KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */
103 KERN_PPC_ZEROPAGED=26, /* turn idle page zeroing on/off on PPC */
104 KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */
105 KERN_MODPROBE=28, /* string: modprobe path */
106 KERN_SG_BIG_BUFF=29, /* int: sg driver reserved buffer size */
107 KERN_ACCT=30, /* BSD process accounting parameters */
108 KERN_PPC_L2CR=31, /* l2cr register on PPC */
109
110 KERN_RTSIGNR=32, /* Number of rt sigs queued */
111 KERN_RTSIGMAX=33, /* Max queuable */
112
113 KERN_SHMMAX=34, /* long: Maximum shared memory segment */
114 KERN_MSGMAX=35, /* int: Maximum size of a messege */
115 KERN_MSGMNB=36, /* int: Maximum message queue size */
116 KERN_MSGPOOL=37, /* int: Maximum system message pool size */
117 KERN_SYSRQ=38, /* int: Sysreq enable */
118 KERN_MAX_THREADS=39, /* int: Maximum nr of threads in the system */
119 KERN_RANDOM=40, /* Random driver */
120 KERN_SHMALL=41, /* int: Maximum size of shared memory */
121 KERN_MSGMNI=42, /* int: msg queue identifiers */
122 KERN_SEM=43, /* struct: sysv semaphore limits */
123 KERN_SPARC_STOP_A=44, /* int: Sparc Stop-A enable */
124 KERN_SHMMNI=45, /* int: shm array identifiers */
125 KERN_OVERFLOWUID=46, /* int: overflow UID */
126 KERN_OVERFLOWGID=47, /* int: overflow GID */
127 KERN_SHMPATH=48, /* string: path to shm fs */
128 KERN_HOTPLUG=49, /* string: path to uevent helper (deprecated) */
129 KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
130 KERN_S390_USER_DEBUG_LOGGING=51, /* int: dumps of user faults */
131 KERN_CORE_USES_PID=52, /* int: use core or core.%pid */
132 KERN_TAINTED=53, /* int: various kernel tainted flags */
133 KERN_CADPID=54, /* int: PID of the process to notify on CAD */
134 KERN_PIDMAX=55, /* int: PID # limit */
135 KERN_CORE_PATTERN=56, /* string: pattern for core-file names */
136 KERN_PANIC_ON_OOPS=57, /* int: whether we will panic on an oops */
137 KERN_HPPA_PWRSW=58, /* int: hppa soft-power enable */
138 KERN_HPPA_UNALIGNED=59, /* int: hppa unaligned-trap enable */
139 KERN_PRINTK_RATELIMIT=60, /* int: tune printk ratelimiting */
140 KERN_PRINTK_RATELIMIT_BURST=61, /* int: tune printk ratelimiting */
141 KERN_PTY=62, /* dir: pty driver */
142 KERN_NGROUPS_MAX=63, /* int: NGROUPS_MAX */
143 KERN_SPARC_SCONS_PWROFF=64, /* int: serial console power-off halt */
144 KERN_HZ_TIMER=65, /* int: hz timer on or off */
145 KERN_UNKNOWN_NMI_PANIC=66, /* int: unknown nmi panic flag */
146 KERN_BOOTLOADER_TYPE=67, /* int: boot loader type */
147 KERN_RANDOMIZE=68, /* int: randomize virtual address space */
148 KERN_SETUID_DUMPABLE=69, /* int: behaviour of dumps for setuid core */
149 KERN_SPIN_RETRY=70, /* int: number of spinlock retries */
150 KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */
151 KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */
152 KERN_COMPAT_LOG=73, /* int: print compat layer messages */
153 KERN_MAX_LOCK_DEPTH=74, /* int: rtmutex's maximum lock depth */
154 KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
155 KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
156 };
157
158
159
160 /* CTL_VM names: */
161 enum
162 {
163 VM_UNUSED1=1, /* was: struct: Set vm swapping control */
164 VM_UNUSED2=2, /* was; int: Linear or sqrt() swapout for hogs */
165 VM_UNUSED3=3, /* was: struct: Set free page thresholds */
166 VM_UNUSED4=4, /* Spare */
167 VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
168 VM_UNUSED5=6, /* was: struct: Set buffer memory thresholds */
169 VM_UNUSED7=7, /* was: struct: Set cache memory thresholds */
170 VM_UNUSED8=8, /* was: struct: Control kswapd behaviour */
171 VM_UNUSED9=9, /* was: struct: Set page table cache parameters */
172 VM_PAGE_CLUSTER=10, /* int: set number of pages to swap together */
173 VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
174 VM_DIRTY_RATIO=12, /* dirty_ratio */
175 VM_DIRTY_WB_CS=13, /* dirty_writeback_centisecs */
176 VM_DIRTY_EXPIRE_CS=14, /* dirty_expire_centisecs */
177 VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
178 VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
179 VM_PAGEBUF=17, /* struct: Control pagebuf parameters */
180 VM_HUGETLB_PAGES=18, /* int: Number of available Huge Pages */
181 VM_SWAPPINESS=19, /* Tendency to steal mapped memory */
182 VM_LOWMEM_RESERVE_RATIO=20,/* reservation ratio for lower memory zones */
183 VM_MIN_FREE_KBYTES=21, /* Minimum free kilobytes to maintain */
184 VM_MAX_MAP_COUNT=22, /* int: Maximum number of mmaps/address-space */
185 VM_LAPTOP_MODE=23, /* vm laptop mode */
186 VM_BLOCK_DUMP=24, /* block dump mode */
187 VM_HUGETLB_GROUP=25, /* permitted hugetlb group */
188 VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
189 VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
190 VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
191 VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */
192 VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */
193 VM_ZONE_RECLAIM_MODE=31, /* reclaim local zone memory before going off node */
194 VM_MIN_UNMAPPED=32, /* Set min percent of unmapped pages */
195 VM_PANIC_ON_OOM=33, /* panic at out-of-memory */
196 VM_VDSO_ENABLED=34, /* map VDSO into new processes? */
197 VM_MIN_SLAB=35, /* Percent pages ignored by zone reclaim */
198 };
199
200
201 /* CTL_NET names: */
202 enum
203 {
204 NET_CORE=1,
205 NET_ETHER=2,
206 NET_802=3,
207 NET_UNIX=4,
208 NET_IPV4=5,
209 NET_IPX=6,
210 NET_ATALK=7,
211 NET_NETROM=8,
212 NET_AX25=9,
213 NET_BRIDGE=10,
214 NET_ROSE=11,
215 NET_IPV6=12,
216 NET_X25=13,
217 NET_TR=14,
218 NET_DECNET=15,
219 NET_ECONET=16,
220 NET_SCTP=17,
221 NET_LLC=18,
222 NET_NETFILTER=19,
223 NET_DCCP=20,
224 NET_IRDA=412,
225 };
226
227 /* /proc/sys/kernel/random */
228 enum
229 {
230 RANDOM_POOLSIZE=1,
231 RANDOM_ENTROPY_COUNT=2,
232 RANDOM_READ_THRESH=3,
233 RANDOM_WRITE_THRESH=4,
234 RANDOM_BOOT_ID=5,
235 RANDOM_UUID=6
236 };
237
238 /* /proc/sys/kernel/pty */
239 enum
240 {
241 PTY_MAX=1,
242 PTY_NR=2
243 };
244
245 /* /proc/sys/bus/isa */
246 enum
247 {
248 BUS_ISA_MEM_BASE=1,
249 BUS_ISA_PORT_BASE=2,
250 BUS_ISA_PORT_SHIFT=3
251 };
252
253 /* /proc/sys/net/core */
254 enum
255 {
256 NET_CORE_WMEM_MAX=1,
257 NET_CORE_RMEM_MAX=2,
258 NET_CORE_WMEM_DEFAULT=3,
259 NET_CORE_RMEM_DEFAULT=4,
260 /* was NET_CORE_DESTROY_DELAY */
261 NET_CORE_MAX_BACKLOG=6,
262 NET_CORE_FASTROUTE=7,
263 NET_CORE_MSG_COST=8,
264 NET_CORE_MSG_BURST=9,
265 NET_CORE_OPTMEM_MAX=10,
266 NET_CORE_HOT_LIST_LENGTH=11,
267 NET_CORE_DIVERT_VERSION=12,
268 NET_CORE_NO_CONG_THRESH=13,
269 NET_CORE_NO_CONG=14,
270 NET_CORE_LO_CONG=15,
271 NET_CORE_MOD_CONG=16,
272 NET_CORE_DEV_WEIGHT=17,
273 NET_CORE_SOMAXCONN=18,
274 NET_CORE_BUDGET=19,
275 NET_CORE_AEVENT_ETIME=20,
276 NET_CORE_AEVENT_RSEQTH=21,
277 NET_CORE_WARNINGS=22,
278 };
279
280 /* /proc/sys/net/ethernet */
281
282 /* /proc/sys/net/802 */
283
284 /* /proc/sys/net/unix */
285
286 enum
287 {
288 NET_UNIX_DESTROY_DELAY=1,
289 NET_UNIX_DELETE_DELAY=2,
290 NET_UNIX_MAX_DGRAM_QLEN=3,
291 };
292
293 /* /proc/sys/net/netfilter */
294 enum
295 {
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,
328 };
329
330 /* /proc/sys/net/ipv4 */
331 enum
332 {
333 /* v2.0 compatibile variables */
334 NET_IPV4_FORWARD=8,
335 NET_IPV4_DYNADDR=9,
336
337 NET_IPV4_CONF=16,
338 NET_IPV4_NEIGH=17,
339 NET_IPV4_ROUTE=18,
340 NET_IPV4_FIB_HASH=19,
341 NET_IPV4_NETFILTER=20,
342
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,
362 NET_TCP_STDURG=52,
363 NET_TCP_RFC1337=53,
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,
389 NET_TCP_FACK=79,
390 NET_TCP_REORDERING=80,
391 NET_TCP_ECN=81,
392 NET_TCP_DSACK=82,
393 NET_TCP_MEM=83,
394 NET_TCP_WMEM=84,
395 NET_TCP_RMEM=85,
396 NET_TCP_APP_WIN=86,
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,
401 NET_TCP_TW_REUSE=91,
402 NET_TCP_FRTO=92,
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,
413 NET_TCP_ABC=111,
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 NET_CIPSOV4_CACHE_ENABLE=118,
421 NET_CIPSOV4_CACHE_BUCKET_SIZE=119,
422 NET_CIPSOV4_RBM_OPTFMT=120,
423 NET_CIPSOV4_RBM_STRICTVALID=121,
424 NET_TCP_AVAIL_CONG_CONTROL=122,
425 NET_TCP_ALLOWED_CONG_CONTROL=123,
426 NET_TCP_MAX_SSTHRESH=124,
427 NET_TCP_FRTO_RESPONSE=125,
428 };
429
430 enum {
431 NET_IPV4_ROUTE_FLUSH=1,
432 NET_IPV4_ROUTE_MIN_DELAY=2, /* obsolete since 2.6.25 */
433 NET_IPV4_ROUTE_MAX_DELAY=3, /* obsolete since 2.6.25 */
434 NET_IPV4_ROUTE_GC_THRESH=4,
435 NET_IPV4_ROUTE_MAX_SIZE=5,
436 NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
437 NET_IPV4_ROUTE_GC_TIMEOUT=7,
438 NET_IPV4_ROUTE_GC_INTERVAL=8, /* obsolete since 2.6.38 */
439 NET_IPV4_ROUTE_REDIRECT_LOAD=9,
440 NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
441 NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
442 NET_IPV4_ROUTE_ERROR_COST=12,
443 NET_IPV4_ROUTE_ERROR_BURST=13,
444 NET_IPV4_ROUTE_GC_ELASTICITY=14,
445 NET_IPV4_ROUTE_MTU_EXPIRES=15,
446 NET_IPV4_ROUTE_MIN_PMTU=16,
447 NET_IPV4_ROUTE_MIN_ADVMSS=17,
448 NET_IPV4_ROUTE_SECRET_INTERVAL=18,
449 NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS=19,
450 };
451
452 enum
453 {
454 NET_PROTO_CONF_ALL=-2,
455 NET_PROTO_CONF_DEFAULT=-3
456
457 /* And device ifindices ... */
458 };
459
460 enum
461 {
462 NET_IPV4_CONF_FORWARDING=1,
463 NET_IPV4_CONF_MC_FORWARDING=2,
464 NET_IPV4_CONF_PROXY_ARP=3,
465 NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
466 NET_IPV4_CONF_SECURE_REDIRECTS=5,
467 NET_IPV4_CONF_SEND_REDIRECTS=6,
468 NET_IPV4_CONF_SHARED_MEDIA=7,
469 NET_IPV4_CONF_RP_FILTER=8,
470 NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
471 NET_IPV4_CONF_BOOTP_RELAY=10,
472 NET_IPV4_CONF_LOG_MARTIANS=11,
473 NET_IPV4_CONF_TAG=12,
474 NET_IPV4_CONF_ARPFILTER=13,
475 NET_IPV4_CONF_MEDIUM_ID=14,
476 NET_IPV4_CONF_NOXFRM=15,
477 NET_IPV4_CONF_NOPOLICY=16,
478 NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
479 NET_IPV4_CONF_ARP_ANNOUNCE=18,
480 NET_IPV4_CONF_ARP_IGNORE=19,
481 NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
482 NET_IPV4_CONF_ARP_ACCEPT=21,
483 NET_IPV4_CONF_ARP_NOTIFY=22,
484 };
485
486 /* /proc/sys/net/ipv4/netfilter */
487 enum
488 {
489 NET_IPV4_NF_CONNTRACK_MAX=1,
490 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
491 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
492 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
493 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
494 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
495 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
496 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
497 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
498 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
499 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
500 NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
501 NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
502 NET_IPV4_NF_CONNTRACK_BUCKETS=14,
503 NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
504 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
505 NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
506 NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
507 NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
508 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
509 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
510 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
511 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
512 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
513 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
514 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
515 NET_IPV4_NF_CONNTRACK_COUNT=27,
516 NET_IPV4_NF_CONNTRACK_CHECKSUM=28,
517 };
518
519 /* /proc/sys/net/ipv6 */
520 enum {
521 NET_IPV6_CONF=16,
522 NET_IPV6_NEIGH=17,
523 NET_IPV6_ROUTE=18,
524 NET_IPV6_ICMP=19,
525 NET_IPV6_BINDV6ONLY=20,
526 NET_IPV6_IP6FRAG_HIGH_THRESH=21,
527 NET_IPV6_IP6FRAG_LOW_THRESH=22,
528 NET_IPV6_IP6FRAG_TIME=23,
529 NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
530 NET_IPV6_MLD_MAX_MSF=25,
531 };
532
533 enum {
534 NET_IPV6_ROUTE_FLUSH=1,
535 NET_IPV6_ROUTE_GC_THRESH=2,
536 NET_IPV6_ROUTE_MAX_SIZE=3,
537 NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
538 NET_IPV6_ROUTE_GC_TIMEOUT=5,
539 NET_IPV6_ROUTE_GC_INTERVAL=6,
540 NET_IPV6_ROUTE_GC_ELASTICITY=7,
541 NET_IPV6_ROUTE_MTU_EXPIRES=8,
542 NET_IPV6_ROUTE_MIN_ADVMSS=9,
543 NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS=10
544 };
545
546 enum {
547 NET_IPV6_FORWARDING=1,
548 NET_IPV6_HOP_LIMIT=2,
549 NET_IPV6_MTU=3,
550 NET_IPV6_ACCEPT_RA=4,
551 NET_IPV6_ACCEPT_REDIRECTS=5,
552 NET_IPV6_AUTOCONF=6,
553 NET_IPV6_DAD_TRANSMITS=7,
554 NET_IPV6_RTR_SOLICITS=8,
555 NET_IPV6_RTR_SOLICIT_INTERVAL=9,
556 NET_IPV6_RTR_SOLICIT_DELAY=10,
557 NET_IPV6_USE_TEMPADDR=11,
558 NET_IPV6_TEMP_VALID_LFT=12,
559 NET_IPV6_TEMP_PREFERED_LFT=13,
560 NET_IPV6_REGEN_MAX_RETRY=14,
561 NET_IPV6_MAX_DESYNC_FACTOR=15,
562 NET_IPV6_MAX_ADDRESSES=16,
563 NET_IPV6_FORCE_MLD_VERSION=17,
564 NET_IPV6_ACCEPT_RA_DEFRTR=18,
565 NET_IPV6_ACCEPT_RA_PINFO=19,
566 NET_IPV6_ACCEPT_RA_RTR_PREF=20,
567 NET_IPV6_RTR_PROBE_INTERVAL=21,
568 NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
569 NET_IPV6_PROXY_NDP=23,
570 NET_IPV6_ACCEPT_SOURCE_ROUTE=25,
571 __NET_IPV6_MAX
572 };
573
574 /* /proc/sys/net/ipv6/icmp */
575 enum {
576 NET_IPV6_ICMP_RATELIMIT=1
577 };
578
579 /* /proc/sys/net/<protocol>/neigh/<dev> */
580 enum {
581 NET_NEIGH_MCAST_SOLICIT=1,
582 NET_NEIGH_UCAST_SOLICIT=2,
583 NET_NEIGH_APP_SOLICIT=3,
584 NET_NEIGH_RETRANS_TIME=4,
585 NET_NEIGH_REACHABLE_TIME=5,
586 NET_NEIGH_DELAY_PROBE_TIME=6,
587 NET_NEIGH_GC_STALE_TIME=7,
588 NET_NEIGH_UNRES_QLEN=8,
589 NET_NEIGH_PROXY_QLEN=9,
590 NET_NEIGH_ANYCAST_DELAY=10,
591 NET_NEIGH_PROXY_DELAY=11,
592 NET_NEIGH_LOCKTIME=12,
593 NET_NEIGH_GC_INTERVAL=13,
594 NET_NEIGH_GC_THRESH1=14,
595 NET_NEIGH_GC_THRESH2=15,
596 NET_NEIGH_GC_THRESH3=16,
597 NET_NEIGH_RETRANS_TIME_MS=17,
598 NET_NEIGH_REACHABLE_TIME_MS=18,
599 };
600
601 /* /proc/sys/net/dccp */
602 enum {
603 NET_DCCP_DEFAULT=1,
604 };
605
606 /* /proc/sys/net/ipx */
607 enum {
608 NET_IPX_PPROP_BROADCASTING=1,
609 NET_IPX_FORWARDING=2
610 };
611
612 /* /proc/sys/net/llc */
613 enum {
614 NET_LLC2=1,
615 NET_LLC_STATION=2,
616 };
617
618 /* /proc/sys/net/llc/llc2 */
619 enum {
620 NET_LLC2_TIMEOUT=1,
621 };
622
623 /* /proc/sys/net/llc/station */
624 enum {
625 NET_LLC_STATION_ACK_TIMEOUT=1,
626 };
627
628 /* /proc/sys/net/llc/llc2/timeout */
629 enum {
630 NET_LLC2_ACK_TIMEOUT=1,
631 NET_LLC2_P_TIMEOUT=2,
632 NET_LLC2_REJ_TIMEOUT=3,
633 NET_LLC2_BUSY_TIMEOUT=4,
634 };
635
636 /* /proc/sys/net/appletalk */
637 enum {
638 NET_ATALK_AARP_EXPIRY_TIME=1,
639 NET_ATALK_AARP_TICK_TIME=2,
640 NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
641 NET_ATALK_AARP_RESOLVE_TIME=4
642 };
643
644
645 /* /proc/sys/net/netrom */
646 enum {
647 NET_NETROM_DEFAULT_PATH_QUALITY=1,
648 NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
649 NET_NETROM_NETWORK_TTL_INITIALISER=3,
650 NET_NETROM_TRANSPORT_TIMEOUT=4,
651 NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
652 NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
653 NET_NETROM_TRANSPORT_BUSY_DELAY=7,
654 NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
655 NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
656 NET_NETROM_ROUTING_CONTROL=10,
657 NET_NETROM_LINK_FAILS_COUNT=11,
658 NET_NETROM_RESET=12
659 };
660
661 /* /proc/sys/net/ax25 */
662 enum {
663 NET_AX25_IP_DEFAULT_MODE=1,
664 NET_AX25_DEFAULT_MODE=2,
665 NET_AX25_BACKOFF_TYPE=3,
666 NET_AX25_CONNECT_MODE=4,
667 NET_AX25_STANDARD_WINDOW=5,
668 NET_AX25_EXTENDED_WINDOW=6,
669 NET_AX25_T1_TIMEOUT=7,
670 NET_AX25_T2_TIMEOUT=8,
671 NET_AX25_T3_TIMEOUT=9,
672 NET_AX25_IDLE_TIMEOUT=10,
673 NET_AX25_N2=11,
674 NET_AX25_PACLEN=12,
675 NET_AX25_PROTOCOL=13,
676 NET_AX25_DAMA_SLAVE_TIMEOUT=14
677 };
678
679 /* /proc/sys/net/rose */
680 enum {
681 NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
682 NET_ROSE_CALL_REQUEST_TIMEOUT=2,
683 NET_ROSE_RESET_REQUEST_TIMEOUT=3,
684 NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
685 NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
686 NET_ROSE_ROUTING_CONTROL=6,
687 NET_ROSE_LINK_FAIL_TIMEOUT=7,
688 NET_ROSE_MAX_VCS=8,
689 NET_ROSE_WINDOW_SIZE=9,
690 NET_ROSE_NO_ACTIVITY_TIMEOUT=10
691 };
692
693 /* /proc/sys/net/x25 */
694 enum {
695 NET_X25_RESTART_REQUEST_TIMEOUT=1,
696 NET_X25_CALL_REQUEST_TIMEOUT=2,
697 NET_X25_RESET_REQUEST_TIMEOUT=3,
698 NET_X25_CLEAR_REQUEST_TIMEOUT=4,
699 NET_X25_ACK_HOLD_BACK_TIMEOUT=5,
700 NET_X25_FORWARD=6
701 };
702
703 /* /proc/sys/net/token-ring */
704 enum
705 {
706 NET_TR_RIF_TIMEOUT=1
707 };
708
709 /* /proc/sys/net/decnet/ */
710 enum {
711 NET_DECNET_NODE_TYPE = 1,
712 NET_DECNET_NODE_ADDRESS = 2,
713 NET_DECNET_NODE_NAME = 3,
714 NET_DECNET_DEFAULT_DEVICE = 4,
715 NET_DECNET_TIME_WAIT = 5,
716 NET_DECNET_DN_COUNT = 6,
717 NET_DECNET_DI_COUNT = 7,
718 NET_DECNET_DR_COUNT = 8,
719 NET_DECNET_DST_GC_INTERVAL = 9,
720 NET_DECNET_CONF = 10,
721 NET_DECNET_NO_FC_MAX_CWND = 11,
722 NET_DECNET_MEM = 12,
723 NET_DECNET_RMEM = 13,
724 NET_DECNET_WMEM = 14,
725 NET_DECNET_DEBUG_LEVEL = 255
726 };
727
728 /* /proc/sys/net/decnet/conf/<dev> */
729 enum {
730 NET_DECNET_CONF_LOOPBACK = -2,
731 NET_DECNET_CONF_DDCMP = -3,
732 NET_DECNET_CONF_PPP = -4,
733 NET_DECNET_CONF_X25 = -5,
734 NET_DECNET_CONF_GRE = -6,
735 NET_DECNET_CONF_ETHER = -7
736
737 /* ... and ifindex of devices */
738 };
739
740 /* /proc/sys/net/decnet/conf/<dev>/ */
741 enum {
742 NET_DECNET_CONF_DEV_PRIORITY = 1,
743 NET_DECNET_CONF_DEV_T1 = 2,
744 NET_DECNET_CONF_DEV_T2 = 3,
745 NET_DECNET_CONF_DEV_T3 = 4,
746 NET_DECNET_CONF_DEV_FORWARDING = 5,
747 NET_DECNET_CONF_DEV_BLKSIZE = 6,
748 NET_DECNET_CONF_DEV_STATE = 7
749 };
750
751 /* /proc/sys/net/sctp */
752 enum {
753 NET_SCTP_RTO_INITIAL = 1,
754 NET_SCTP_RTO_MIN = 2,
755 NET_SCTP_RTO_MAX = 3,
756 NET_SCTP_RTO_ALPHA = 4,
757 NET_SCTP_RTO_BETA = 5,
758 NET_SCTP_VALID_COOKIE_LIFE = 6,
759 NET_SCTP_ASSOCIATION_MAX_RETRANS = 7,
760 NET_SCTP_PATH_MAX_RETRANS = 8,
761 NET_SCTP_MAX_INIT_RETRANSMITS = 9,
762 NET_SCTP_HB_INTERVAL = 10,
763 NET_SCTP_PRESERVE_ENABLE = 11,
764 NET_SCTP_MAX_BURST = 12,
765 NET_SCTP_ADDIP_ENABLE = 13,
766 NET_SCTP_PRSCTP_ENABLE = 14,
767 NET_SCTP_SNDBUF_POLICY = 15,
768 NET_SCTP_SACK_TIMEOUT = 16,
769 NET_SCTP_RCVBUF_POLICY = 17,
770 };
771
772 /* /proc/sys/net/bridge */
773 enum {
774 NET_BRIDGE_NF_CALL_ARPTABLES = 1,
775 NET_BRIDGE_NF_CALL_IPTABLES = 2,
776 NET_BRIDGE_NF_CALL_IP6TABLES = 3,
777 NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
778 NET_BRIDGE_NF_FILTER_PPPOE_TAGGED = 5,
779 };
780
781 /* proc/sys/net/irda */
782 enum {
783 NET_IRDA_DISCOVERY=1,
784 NET_IRDA_DEVNAME=2,
785 NET_IRDA_DEBUG=3,
786 NET_IRDA_FAST_POLL=4,
787 NET_IRDA_DISCOVERY_SLOTS=5,
788 NET_IRDA_DISCOVERY_TIMEOUT=6,
789 NET_IRDA_SLOT_TIMEOUT=7,
790 NET_IRDA_MAX_BAUD_RATE=8,
791 NET_IRDA_MIN_TX_TURN_TIME=9,
792 NET_IRDA_MAX_TX_DATA_SIZE=10,
793 NET_IRDA_MAX_TX_WINDOW=11,
794 NET_IRDA_MAX_NOREPLY_TIME=12,
795 NET_IRDA_WARN_NOREPLY_TIME=13,
796 NET_IRDA_LAP_KEEPALIVE_TIME=14,
797 };
798
799
800 /* CTL_FS names: */
801 enum
802 {
803 FS_NRINODE=1, /* int:current number of allocated inodes */
804 FS_STATINODE=2,
805 FS_MAXINODE=3, /* int:maximum number of inodes that can be allocated */
806 FS_NRDQUOT=4, /* int:current number of allocated dquots */
807 FS_MAXDQUOT=5, /* int:maximum number of dquots that can be allocated */
808 FS_NRFILE=6, /* int:current number of allocated filedescriptors */
809 FS_MAXFILE=7, /* int:maximum number of filedescriptors that can be allocated */
810 FS_DENTRY=8,
811 FS_NRSUPER=9, /* int:current number of allocated super_blocks */
812 FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
813 FS_OVERFLOWUID=11, /* int: overflow UID */
814 FS_OVERFLOWGID=12, /* int: overflow GID */
815 FS_LEASES=13, /* int: leases enabled */
816 FS_DIR_NOTIFY=14, /* int: directory notification enabled */
817 FS_LEASE_TIME=15, /* int: maximum time to wait for a lease break */
818 FS_DQSTATS=16, /* disc quota usage statistics and control */
819 FS_XFS=17, /* struct: control xfs parameters */
820 FS_AIO_NR=18, /* current system-wide number of aio requests */
821 FS_AIO_MAX_NR=19, /* system-wide maximum number of aio requests */
822 FS_INOTIFY=20, /* inotify submenu */
823 FS_OCFS2=988, /* ocfs2 */
824 };
825
826 /* /proc/sys/fs/quota/ */
827 enum {
828 FS_DQ_LOOKUPS = 1,
829 FS_DQ_DROPS = 2,
830 FS_DQ_READS = 3,
831 FS_DQ_WRITES = 4,
832 FS_DQ_CACHE_HITS = 5,
833 FS_DQ_ALLOCATED = 6,
834 FS_DQ_FREE = 7,
835 FS_DQ_SYNCS = 8,
836 FS_DQ_WARNINGS = 9,
837 };
838
839 /* CTL_DEBUG names: */
840
841 /* CTL_DEV names: */
842 enum {
843 DEV_CDROM=1,
844 DEV_HWMON=2,
845 DEV_PARPORT=3,
846 DEV_RAID=4,
847 DEV_MAC_HID=5,
848 DEV_SCSI=6,
849 DEV_IPMI=7,
850 };
851
852 /* /proc/sys/dev/cdrom */
853 enum {
854 DEV_CDROM_INFO=1,
855 DEV_CDROM_AUTOCLOSE=2,
856 DEV_CDROM_AUTOEJECT=3,
857 DEV_CDROM_DEBUG=4,
858 DEV_CDROM_LOCK=5,
859 DEV_CDROM_CHECK_MEDIA=6
860 };
861
862 /* /proc/sys/dev/parport */
863 enum {
864 DEV_PARPORT_DEFAULT=-3
865 };
866
867 /* /proc/sys/dev/raid */
868 enum {
869 DEV_RAID_SPEED_LIMIT_MIN=1,
870 DEV_RAID_SPEED_LIMIT_MAX=2
871 };
872
873 /* /proc/sys/dev/parport/default */
874 enum {
875 DEV_PARPORT_DEFAULT_TIMESLICE=1,
876 DEV_PARPORT_DEFAULT_SPINTIME=2
877 };
878
879 /* /proc/sys/dev/parport/parport n */
880 enum {
881 DEV_PARPORT_SPINTIME=1,
882 DEV_PARPORT_BASE_ADDR=2,
883 DEV_PARPORT_IRQ=3,
884 DEV_PARPORT_DMA=4,
885 DEV_PARPORT_MODES=5,
886 DEV_PARPORT_DEVICES=6,
887 DEV_PARPORT_AUTOPROBE=16
888 };
889
890 /* /proc/sys/dev/parport/parport n/devices/ */
891 enum {
892 DEV_PARPORT_DEVICES_ACTIVE=-3,
893 };
894
895 /* /proc/sys/dev/parport/parport n/devices/device n */
896 enum {
897 DEV_PARPORT_DEVICE_TIMESLICE=1,
898 };
899
900 /* /proc/sys/dev/mac_hid */
901 enum {
902 DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
903 DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
904 DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
905 DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
906 DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
907 DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
908 };
909
910 /* /proc/sys/dev/scsi */
911 enum {
912 DEV_SCSI_LOGGING_LEVEL=1,
913 };
914
915 /* /proc/sys/dev/ipmi */
916 enum {
917 DEV_IPMI_POWEROFF_POWERCYCLE=1,
918 };
919
920 /* /proc/sys/abi */
921 enum
922 {
923 ABI_DEFHANDLER_COFF=1, /* default handler for coff binaries */
924 ABI_DEFHANDLER_ELF=2, /* default handler for ELF binaries */
925 ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
926 ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
927 ABI_TRACE=5, /* tracing flags */
928 ABI_FAKE_UTSNAME=6, /* fake target utsname information */
929 };
930
931 #ifdef __KERNEL__
932 #include <linux/list.h>
933 #include <linux/rcupdate.h>
934 #include <linux/wait.h>
935 #include <linux/rbtree.h>
936
937 /* For the /proc/sys support */
938 struct ctl_table;
939 struct nsproxy;
940 struct ctl_table_root;
941 struct ctl_table_header;
942 struct ctl_dir;
943
944 typedef struct ctl_table ctl_table;
945
946 typedef int proc_handler (struct ctl_table *ctl, int write,
947 void __user *buffer, size_t *lenp, loff_t *ppos);
948
949 extern int proc_dostring(struct ctl_table *, int,
950 void __user *, size_t *, loff_t *);
951 extern int proc_dointvec(struct ctl_table *, int,
952 void __user *, size_t *, loff_t *);
953 extern int proc_dointvec_minmax(struct ctl_table *, int,
954 void __user *, size_t *, loff_t *);
955 extern int proc_dointvec_jiffies(struct ctl_table *, int,
956 void __user *, size_t *, loff_t *);
957 extern int proc_dointvec_userhz_jiffies(struct ctl_table *, int,
958 void __user *, size_t *, loff_t *);
959 extern int proc_dointvec_ms_jiffies(struct ctl_table *, int,
960 void __user *, size_t *, loff_t *);
961 extern int proc_doulongvec_minmax(struct ctl_table *, int,
962 void __user *, size_t *, loff_t *);
963 extern int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int,
964 void __user *, size_t *, loff_t *);
965 extern int proc_do_large_bitmap(struct ctl_table *, int,
966 void __user *, size_t *, loff_t *);
967
968 /*
969 * Register a set of sysctl names by calling register_sysctl_table
970 * with an initialised array of struct ctl_table's. An entry with
971 * NULL procname terminates the table. table->de will be
972 * set up by the registration and need not be initialised in advance.
973 *
974 * sysctl names can be mirrored automatically under /proc/sys. The
975 * procname supplied controls /proc naming.
976 *
977 * The table's mode will be honoured both for sys_sysctl(2) and
978 * proc-fs access.
979 *
980 * Leaf nodes in the sysctl tree will be represented by a single file
981 * under /proc; non-leaf nodes will be represented by directories. A
982 * null procname disables /proc mirroring at this node.
983 *
984 * sysctl(2) can automatically manage read and write requests through
985 * the sysctl table. The data and maxlen fields of the ctl_table
986 * struct enable minimal validation of the values being written to be
987 * performed, and the mode field allows minimal authentication.
988 *
989 * There must be a proc_handler routine for any terminal nodes
990 * mirrored under /proc/sys (non-terminals are handled by a built-in
991 * directory handler). Several default handlers are available to
992 * cover common cases.
993 */
994
995 /* Support for userspace poll() to watch for changes */
996 struct ctl_table_poll {
997 atomic_t event;
998 wait_queue_head_t wait;
999 };
1000
proc_sys_poll_event(struct ctl_table_poll * poll)1001 static inline void *proc_sys_poll_event(struct ctl_table_poll *poll)
1002 {
1003 return (void *)(unsigned long)atomic_read(&poll->event);
1004 }
1005
1006 #define __CTL_TABLE_POLL_INITIALIZER(name) { \
1007 .event = ATOMIC_INIT(0), \
1008 .wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait) }
1009
1010 #define DEFINE_CTL_TABLE_POLL(name) \
1011 struct ctl_table_poll name = __CTL_TABLE_POLL_INITIALIZER(name)
1012
1013 /* A sysctl table is an array of struct ctl_table: */
1014 struct ctl_table
1015 {
1016 const char *procname; /* Text ID for /proc/sys, or zero */
1017 void *data;
1018 int maxlen;
1019 umode_t mode;
1020 struct ctl_table *child; /* Deprecated */
1021 proc_handler *proc_handler; /* Callback for text formatting */
1022 struct ctl_table_poll *poll;
1023 void *extra1;
1024 void *extra2;
1025 };
1026
1027 struct ctl_node {
1028 struct rb_node node;
1029 struct ctl_table_header *header;
1030 };
1031
1032 /* struct ctl_table_header is used to maintain dynamic lists of
1033 struct ctl_table trees. */
1034 struct ctl_table_header
1035 {
1036 union {
1037 struct {
1038 struct ctl_table *ctl_table;
1039 int used;
1040 int count;
1041 int nreg;
1042 };
1043 struct rcu_head rcu;
1044 };
1045 struct completion *unregistering;
1046 struct ctl_table *ctl_table_arg;
1047 struct ctl_table_root *root;
1048 struct ctl_table_set *set;
1049 struct ctl_dir *parent;
1050 struct ctl_node *node;
1051 };
1052
1053 struct ctl_dir {
1054 /* Header must be at the start of ctl_dir */
1055 struct ctl_table_header header;
1056 struct rb_root root;
1057 };
1058
1059 struct ctl_table_set {
1060 int (*is_seen)(struct ctl_table_set *);
1061 struct ctl_dir dir;
1062 };
1063
1064 struct ctl_table_root {
1065 struct ctl_table_set default_set;
1066 struct ctl_table_set *(*lookup)(struct ctl_table_root *root,
1067 struct nsproxy *namespaces);
1068 int (*permissions)(struct ctl_table_root *root,
1069 struct nsproxy *namespaces, struct ctl_table *table);
1070 };
1071
1072 /* struct ctl_path describes where in the hierarchy a table is added */
1073 struct ctl_path {
1074 const char *procname;
1075 };
1076
1077 #ifdef CONFIG_SYSCTL
1078
1079 void proc_sys_poll_notify(struct ctl_table_poll *poll);
1080
1081 extern void setup_sysctl_set(struct ctl_table_set *p,
1082 struct ctl_table_root *root,
1083 int (*is_seen)(struct ctl_table_set *));
1084 extern void retire_sysctl_set(struct ctl_table_set *set);
1085
1086 void register_sysctl_root(struct ctl_table_root *root);
1087 struct ctl_table_header *__register_sysctl_table(
1088 struct ctl_table_set *set,
1089 const char *path, struct ctl_table *table);
1090 struct ctl_table_header *__register_sysctl_paths(
1091 struct ctl_table_set *set,
1092 const struct ctl_path *path, struct ctl_table *table);
1093 struct ctl_table_header *register_sysctl(const char *path, struct ctl_table *table);
1094 struct ctl_table_header *register_sysctl_table(struct ctl_table * table);
1095 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
1096 struct ctl_table *table);
1097
1098 void unregister_sysctl_table(struct ctl_table_header * table);
1099
1100 extern int sysctl_init(void);
1101 #else /* CONFIG_SYSCTL */
register_sysctl_table(struct ctl_table * table)1102 static inline struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
1103 {
1104 return NULL;
1105 }
1106
register_sysctl_paths(const struct ctl_path * path,struct ctl_table * table)1107 static inline struct ctl_table_header *register_sysctl_paths(
1108 const struct ctl_path *path, struct ctl_table *table)
1109 {
1110 return NULL;
1111 }
1112
unregister_sysctl_table(struct ctl_table_header * table)1113 static inline void unregister_sysctl_table(struct ctl_table_header * table)
1114 {
1115 }
1116
setup_sysctl_set(struct ctl_table_set * p,struct ctl_table_root * root,int (* is_seen)(struct ctl_table_set *))1117 static inline void setup_sysctl_set(struct ctl_table_set *p,
1118 struct ctl_table_root *root,
1119 int (*is_seen)(struct ctl_table_set *))
1120 {
1121 }
1122
1123 #endif /* CONFIG_SYSCTL */
1124
1125 #endif /* __KERNEL__ */
1126
1127 #endif /* _LINUX_SYSCTL_H */
1128