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[TCP]: Add RFC3742 Limited Slow-Start, controlled by variable sysctl_tcp_max_ssthresh.
[linux-2.6/mini2440.git] / include / linux / sysctl.h
blob98e0fd241a255063a54e5eda7620278d16f4f26d
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 ** For new interfaces unless you really need a binary number
19 ** please use CTL_UNNUMBERED.
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>
30 #include <linux/compiler.h>
31
32 struct file;
33 struct completion;
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
40 struct __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_NONE 0
57 #define CTL_UNNUMBERED CTL_NONE /* sysctl without a binary number */
58 #endif
59
60 enum
61 {
62 CTL_KERN=1, /* General kernel info and control */
63 CTL_VM=2, /* VM management */
64 CTL_NET=3, /* Networking */
65 /* was CTL_PROC */
66 CTL_FS=5, /* Filesystems */
67 CTL_DEBUG=6, /* Debugging */
68 CTL_DEV=7, /* Devices */
69 CTL_BUS=8, /* Busses */
70 CTL_ABI=9, /* Binary emulation */
71 CTL_CPU=10, /* CPU stuff (speed scaling, etc) */
72 CTL_ARLAN=254, /* arlan wireless driver */
73 CTL_APPLDATA=2120, /* s390 appldata */
74 CTL_S390DBF=5677, /* s390 debug */
75 CTL_SUNRPC=7249, /* sunrpc debug */
76 CTL_PM=9899, /* frv power management */
77 CTL_FRV=9898, /* frv specific sysctls */
78 };
79
80 /* CTL_BUS names: */
81 enum
82 {
83 CTL_BUS_ISA=1 /* ISA */
84 };
85
86 /* /proc/sys/fs/inotify/ */
87 enum
88 {
89 INOTIFY_MAX_USER_INSTANCES=1, /* max instances per user */
90 INOTIFY_MAX_USER_WATCHES=2, /* max watches per user */
91 INOTIFY_MAX_QUEUED_EVENTS=3 /* max queued events per instance */
92 };
93
94 /* CTL_KERN names: */
95 enum
96 {
97 KERN_OSTYPE=1, /* string: system version */
98 KERN_OSRELEASE=2, /* string: system release */
99 KERN_OSREV=3, /* int: system revision */
100 KERN_VERSION=4, /* string: compile time info */
101 KERN_SECUREMASK=5, /* struct: maximum rights mask */
102 KERN_PROF=6, /* table: profiling information */
103 KERN_NODENAME=7,
104 KERN_DOMAINNAME=8,
105
106 KERN_CAP_BSET=14, /* int: capability bounding set */
107 KERN_PANIC=15, /* int: panic timeout */
108 KERN_REALROOTDEV=16, /* real root device to mount after initrd */
109
110 KERN_SPARC_REBOOT=21, /* reboot command on Sparc */
111 KERN_CTLALTDEL=22, /* int: allow ctl-alt-del to reboot */
112 KERN_PRINTK=23, /* struct: control printk logging parameters */
113 KERN_NAMETRANS=24, /* Name translation */
114 KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */
115 KERN_PPC_ZEROPAGED=26, /* turn idle page zeroing on/off on PPC */
116 KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */
117 KERN_MODPROBE=28,
118 KERN_SG_BIG_BUFF=29,
119 KERN_ACCT=30, /* BSD process accounting parameters */
120 KERN_PPC_L2CR=31, /* l2cr register on PPC */
121
122 KERN_RTSIGNR=32, /* Number of rt sigs queued */
123 KERN_RTSIGMAX=33, /* Max queuable */
124
125 KERN_SHMMAX=34, /* long: Maximum shared memory segment */
126 KERN_MSGMAX=35, /* int: Maximum size of a messege */
127 KERN_MSGMNB=36, /* int: Maximum message queue size */
128 KERN_MSGPOOL=37, /* int: Maximum system message pool size */
129 KERN_SYSRQ=38, /* int: Sysreq enable */
130 KERN_MAX_THREADS=39, /* int: Maximum nr of threads in the system */
131 KERN_RANDOM=40, /* Random driver */
132 KERN_SHMALL=41, /* int: Maximum size of shared memory */
133 KERN_MSGMNI=42, /* int: msg queue identifiers */
134 KERN_SEM=43, /* struct: sysv semaphore limits */
135 KERN_SPARC_STOP_A=44, /* int: Sparc Stop-A enable */
136 KERN_SHMMNI=45, /* int: shm array identifiers */
137 KERN_OVERFLOWUID=46, /* int: overflow UID */
138 KERN_OVERFLOWGID=47, /* int: overflow GID */
139 KERN_SHMPATH=48, /* string: path to shm fs */
140 KERN_HOTPLUG=49, /* string: path to uevent helper (deprecated) */
141 KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
142 KERN_S390_USER_DEBUG_LOGGING=51, /* int: dumps of user faults */
143 KERN_CORE_USES_PID=52, /* int: use core or core.%pid */
144 KERN_TAINTED=53, /* int: various kernel tainted flags */
145 KERN_CADPID=54, /* int: PID of the process to notify on CAD */
146 KERN_PIDMAX=55, /* int: PID # limit */
147 KERN_CORE_PATTERN=56, /* string: pattern for core-file names */
148 KERN_PANIC_ON_OOPS=57, /* int: whether we will panic on an oops */
149 KERN_HPPA_PWRSW=58, /* int: hppa soft-power enable */
150 KERN_HPPA_UNALIGNED=59, /* int: hppa unaligned-trap enable */
151 KERN_PRINTK_RATELIMIT=60, /* int: tune printk ratelimiting */
152 KERN_PRINTK_RATELIMIT_BURST=61, /* int: tune printk ratelimiting */
153 KERN_PTY=62, /* dir: pty driver */
154 KERN_NGROUPS_MAX=63, /* int: NGROUPS_MAX */
155 KERN_SPARC_SCONS_PWROFF=64, /* int: serial console power-off halt */
156 KERN_HZ_TIMER=65, /* int: hz timer on or off */
157 KERN_UNKNOWN_NMI_PANIC=66, /* int: unknown nmi panic flag */
158 KERN_BOOTLOADER_TYPE=67, /* int: boot loader type */
159 KERN_RANDOMIZE=68, /* int: randomize virtual address space */
160 KERN_SETUID_DUMPABLE=69, /* int: behaviour of dumps for setuid core */
161 KERN_SPIN_RETRY=70, /* int: number of spinlock retries */
162 KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */
163 KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */
164 KERN_COMPAT_LOG=73, /* int: print compat layer messages */
165 KERN_MAX_LOCK_DEPTH=74,
166 KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
167 KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
168 };
169
170
171
172 /* CTL_VM names: */
173 enum
174 {
175 VM_UNUSED1=1, /* was: struct: Set vm swapping control */
176 VM_UNUSED2=2, /* was; int: Linear or sqrt() swapout for hogs */
177 VM_UNUSED3=3, /* was: struct: Set free page thresholds */
178 VM_UNUSED4=4, /* Spare */
179 VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
180 VM_UNUSED5=6, /* was: struct: Set buffer memory thresholds */
181 VM_UNUSED7=7, /* was: struct: Set cache memory thresholds */
182 VM_UNUSED8=8, /* was: struct: Control kswapd behaviour */
183 VM_UNUSED9=9, /* was: struct: Set page table cache parameters */
184 VM_PAGE_CLUSTER=10, /* int: set number of pages to swap together */
185 VM_DIRTY_BACKGROUND=11, /* dirty_background_ratio */
186 VM_DIRTY_RATIO=12, /* dirty_ratio */
187 VM_DIRTY_WB_CS=13, /* dirty_writeback_centisecs */
188 VM_DIRTY_EXPIRE_CS=14, /* dirty_expire_centisecs */
189 VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
190 VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
191 VM_PAGEBUF=17, /* struct: Control pagebuf parameters */
192 VM_HUGETLB_PAGES=18, /* int: Number of available Huge Pages */
193 VM_SWAPPINESS=19, /* Tendency to steal mapped memory */
194 VM_LOWMEM_RESERVE_RATIO=20,/* reservation ratio for lower memory zones */
195 VM_MIN_FREE_KBYTES=21, /* Minimum free kilobytes to maintain */
196 VM_MAX_MAP_COUNT=22, /* int: Maximum number of mmaps/address-space */
197 VM_LAPTOP_MODE=23, /* vm laptop mode */
198 VM_BLOCK_DUMP=24, /* block dump mode */
199 VM_HUGETLB_GROUP=25, /* permitted hugetlb group */
200 VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
201 VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
202 VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
203 VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */
204 VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */
205 VM_ZONE_RECLAIM_MODE=31, /* reclaim local zone memory before going off node */
206 VM_MIN_UNMAPPED=32, /* Set min percent of unmapped pages */
207 VM_PANIC_ON_OOM=33, /* panic at out-of-memory */
208 VM_VDSO_ENABLED=34, /* map VDSO into new processes? */
209 VM_MIN_SLAB=35, /* Percent pages ignored by zone reclaim */
210
211 /* s390 vm cmm sysctls */
212 VM_CMM_PAGES=1111,
213 VM_CMM_TIMED_PAGES=1112,
214 VM_CMM_TIMEOUT=1113,
215 };
216
217
218 /* CTL_NET names: */
219 enum
220 {
221 NET_CORE=1,
222 NET_ETHER=2,
223 NET_802=3,
224 NET_UNIX=4,
225 NET_IPV4=5,
226 NET_IPX=6,
227 NET_ATALK=7,
228 NET_NETROM=8,
229 NET_AX25=9,
230 NET_BRIDGE=10,
231 NET_ROSE=11,
232 NET_IPV6=12,
233 NET_X25=13,
234 NET_TR=14,
235 NET_DECNET=15,
236 NET_ECONET=16,
237 NET_SCTP=17,
238 NET_LLC=18,
239 NET_NETFILTER=19,
240 NET_DCCP=20,
241 };
242
243 /* /proc/sys/kernel/random */
244 enum
245 {
246 RANDOM_POOLSIZE=1,
247 RANDOM_ENTROPY_COUNT=2,
248 RANDOM_READ_THRESH=3,
249 RANDOM_WRITE_THRESH=4,
250 RANDOM_BOOT_ID=5,
251 RANDOM_UUID=6
252 };
253
254 /* /proc/sys/kernel/pty */
255 enum
256 {
257 PTY_MAX=1,
258 PTY_NR=2
259 };
260
261 /* /proc/sys/bus/isa */
262 enum
263 {
264 BUS_ISA_MEM_BASE=1,
265 BUS_ISA_PORT_BASE=2,
266 BUS_ISA_PORT_SHIFT=3
267 };
268
269 /* /proc/sys/net/core */
270 enum
271 {
272 NET_CORE_WMEM_MAX=1,
273 NET_CORE_RMEM_MAX=2,
274 NET_CORE_WMEM_DEFAULT=3,
275 NET_CORE_RMEM_DEFAULT=4,
276 /* was NET_CORE_DESTROY_DELAY */
277 NET_CORE_MAX_BACKLOG=6,
278 NET_CORE_FASTROUTE=7,
279 NET_CORE_MSG_COST=8,
280 NET_CORE_MSG_BURST=9,
281 NET_CORE_OPTMEM_MAX=10,
282 NET_CORE_HOT_LIST_LENGTH=11,
283 NET_CORE_DIVERT_VERSION=12,
284 NET_CORE_NO_CONG_THRESH=13,
285 NET_CORE_NO_CONG=14,
286 NET_CORE_LO_CONG=15,
287 NET_CORE_MOD_CONG=16,
288 NET_CORE_DEV_WEIGHT=17,
289 NET_CORE_SOMAXCONN=18,
290 NET_CORE_BUDGET=19,
291 NET_CORE_AEVENT_ETIME=20,
292 NET_CORE_AEVENT_RSEQTH=21,
293 };
294
295 /* /proc/sys/net/ethernet */
296
297 /* /proc/sys/net/802 */
298
299 /* /proc/sys/net/unix */
300
301 enum
302 {
303 NET_UNIX_DESTROY_DELAY=1,
304 NET_UNIX_DELETE_DELAY=2,
305 NET_UNIX_MAX_DGRAM_QLEN=3,
306 };
307
308 /* /proc/sys/net/netfilter */
309 enum
310 {
311 NET_NF_CONNTRACK_MAX=1,
312 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
313 NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
314 NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
315 NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
316 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
317 NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
318 NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
319 NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
320 NET_NF_CONNTRACK_UDP_TIMEOUT=10,
321 NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
322 NET_NF_CONNTRACK_ICMP_TIMEOUT=12,
323 NET_NF_CONNTRACK_GENERIC_TIMEOUT=13,
324 NET_NF_CONNTRACK_BUCKETS=14,
325 NET_NF_CONNTRACK_LOG_INVALID=15,
326 NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
327 NET_NF_CONNTRACK_TCP_LOOSE=17,
328 NET_NF_CONNTRACK_TCP_BE_LIBERAL=18,
329 NET_NF_CONNTRACK_TCP_MAX_RETRANS=19,
330 NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
331 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
332 NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
333 NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
334 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
335 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
336 NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
337 NET_NF_CONNTRACK_COUNT=27,
338 NET_NF_CONNTRACK_ICMPV6_TIMEOUT=28,
339 NET_NF_CONNTRACK_FRAG6_TIMEOUT=29,
340 NET_NF_CONNTRACK_FRAG6_LOW_THRESH=30,
341 NET_NF_CONNTRACK_FRAG6_HIGH_THRESH=31,
342 NET_NF_CONNTRACK_CHECKSUM=32,
343 };
344
345 /* /proc/sys/net/ipv4 */
346 enum
347 {
348 /* v2.0 compatibile variables */
349 NET_IPV4_FORWARD=8,
350 NET_IPV4_DYNADDR=9,
351
352 NET_IPV4_CONF=16,
353 NET_IPV4_NEIGH=17,
354 NET_IPV4_ROUTE=18,
355 NET_IPV4_FIB_HASH=19,
356 NET_IPV4_NETFILTER=20,
357
358 NET_IPV4_TCP_TIMESTAMPS=33,
359 NET_IPV4_TCP_WINDOW_SCALING=34,
360 NET_IPV4_TCP_SACK=35,
361 NET_IPV4_TCP_RETRANS_COLLAPSE=36,
362 NET_IPV4_DEFAULT_TTL=37,
363 NET_IPV4_AUTOCONFIG=38,
364 NET_IPV4_NO_PMTU_DISC=39,
365 NET_IPV4_TCP_SYN_RETRIES=40,
366 NET_IPV4_IPFRAG_HIGH_THRESH=41,
367 NET_IPV4_IPFRAG_LOW_THRESH=42,
368 NET_IPV4_IPFRAG_TIME=43,
369 NET_IPV4_TCP_MAX_KA_PROBES=44,
370 NET_IPV4_TCP_KEEPALIVE_TIME=45,
371 NET_IPV4_TCP_KEEPALIVE_PROBES=46,
372 NET_IPV4_TCP_RETRIES1=47,
373 NET_IPV4_TCP_RETRIES2=48,
374 NET_IPV4_TCP_FIN_TIMEOUT=49,
375 NET_IPV4_IP_MASQ_DEBUG=50,
376 NET_TCP_SYNCOOKIES=51,
377 NET_TCP_STDURG=52,
378 NET_TCP_RFC1337=53,
379 NET_TCP_SYN_TAILDROP=54,
380 NET_TCP_MAX_SYN_BACKLOG=55,
381 NET_IPV4_LOCAL_PORT_RANGE=56,
382 NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
383 NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
384 NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
385 NET_IPV4_ICMP_DESTUNREACH_RATE=60,
386 NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
387 NET_IPV4_ICMP_PARAMPROB_RATE=62,
388 NET_IPV4_ICMP_ECHOREPLY_RATE=63,
389 NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
390 NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
391 NET_TCP_TW_RECYCLE=66,
392 NET_IPV4_ALWAYS_DEFRAG=67,
393 NET_IPV4_TCP_KEEPALIVE_INTVL=68,
394 NET_IPV4_INET_PEER_THRESHOLD=69,
395 NET_IPV4_INET_PEER_MINTTL=70,
396 NET_IPV4_INET_PEER_MAXTTL=71,
397 NET_IPV4_INET_PEER_GC_MINTIME=72,
398 NET_IPV4_INET_PEER_GC_MAXTIME=73,
399 NET_TCP_ORPHAN_RETRIES=74,
400 NET_TCP_ABORT_ON_OVERFLOW=75,
401 NET_TCP_SYNACK_RETRIES=76,
402 NET_TCP_MAX_ORPHANS=77,
403 NET_TCP_MAX_TW_BUCKETS=78,
404 NET_TCP_FACK=79,
405 NET_TCP_REORDERING=80,
406 NET_TCP_ECN=81,
407 NET_TCP_DSACK=82,
408 NET_TCP_MEM=83,
409 NET_TCP_WMEM=84,
410 NET_TCP_RMEM=85,
411 NET_TCP_APP_WIN=86,
412 NET_TCP_ADV_WIN_SCALE=87,
413 NET_IPV4_NONLOCAL_BIND=88,
414 NET_IPV4_ICMP_RATELIMIT=89,
415 NET_IPV4_ICMP_RATEMASK=90,
416 NET_TCP_TW_REUSE=91,
417 NET_TCP_FRTO=92,
418 NET_TCP_LOW_LATENCY=93,
419 NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
420 NET_IPV4_IGMP_MAX_MSF=96,
421 NET_TCP_NO_METRICS_SAVE=97,
422 NET_TCP_DEFAULT_WIN_SCALE=105,
423 NET_TCP_MODERATE_RCVBUF=106,
424 NET_TCP_TSO_WIN_DIVISOR=107,
425 NET_TCP_BIC_BETA=108,
426 NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR=109,
427 NET_TCP_CONG_CONTROL=110,
428 NET_TCP_ABC=111,
429 NET_IPV4_IPFRAG_MAX_DIST=112,
430 NET_TCP_MTU_PROBING=113,
431 NET_TCP_BASE_MSS=114,
432 NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS=115,
433 NET_TCP_DMA_COPYBREAK=116,
434 NET_TCP_SLOW_START_AFTER_IDLE=117,
435 NET_CIPSOV4_CACHE_ENABLE=118,
436 NET_CIPSOV4_CACHE_BUCKET_SIZE=119,
437 NET_CIPSOV4_RBM_OPTFMT=120,
438 NET_CIPSOV4_RBM_STRICTVALID=121,
439 NET_TCP_AVAIL_CONG_CONTROL=122,
440 NET_TCP_ALLOWED_CONG_CONTROL=123,
441 NET_TCP_MAX_SSTHRESH=124,
442 };
443
444 enum {
445 NET_IPV4_ROUTE_FLUSH=1,
446 NET_IPV4_ROUTE_MIN_DELAY=2,
447 NET_IPV4_ROUTE_MAX_DELAY=3,
448 NET_IPV4_ROUTE_GC_THRESH=4,
449 NET_IPV4_ROUTE_MAX_SIZE=5,
450 NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
451 NET_IPV4_ROUTE_GC_TIMEOUT=7,
452 NET_IPV4_ROUTE_GC_INTERVAL=8,
453 NET_IPV4_ROUTE_REDIRECT_LOAD=9,
454 NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
455 NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
456 NET_IPV4_ROUTE_ERROR_COST=12,
457 NET_IPV4_ROUTE_ERROR_BURST=13,
458 NET_IPV4_ROUTE_GC_ELASTICITY=14,
459 NET_IPV4_ROUTE_MTU_EXPIRES=15,
460 NET_IPV4_ROUTE_MIN_PMTU=16,
461 NET_IPV4_ROUTE_MIN_ADVMSS=17,
462 NET_IPV4_ROUTE_SECRET_INTERVAL=18,
463 NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS=19,
464 };
465
466 enum
467 {
468 NET_PROTO_CONF_ALL=-2,
469 NET_PROTO_CONF_DEFAULT=-3
470
471 /* And device ifindices ... */
472 };
473
474 enum
475 {
476 NET_IPV4_CONF_FORWARDING=1,
477 NET_IPV4_CONF_MC_FORWARDING=2,
478 NET_IPV4_CONF_PROXY_ARP=3,
479 NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
480 NET_IPV4_CONF_SECURE_REDIRECTS=5,
481 NET_IPV4_CONF_SEND_REDIRECTS=6,
482 NET_IPV4_CONF_SHARED_MEDIA=7,
483 NET_IPV4_CONF_RP_FILTER=8,
484 NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
485 NET_IPV4_CONF_BOOTP_RELAY=10,
486 NET_IPV4_CONF_LOG_MARTIANS=11,
487 NET_IPV4_CONF_TAG=12,
488 NET_IPV4_CONF_ARPFILTER=13,
489 NET_IPV4_CONF_MEDIUM_ID=14,
490 NET_IPV4_CONF_NOXFRM=15,
491 NET_IPV4_CONF_NOPOLICY=16,
492 NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
493 NET_IPV4_CONF_ARP_ANNOUNCE=18,
494 NET_IPV4_CONF_ARP_IGNORE=19,
495 NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
496 NET_IPV4_CONF_ARP_ACCEPT=21,
497 __NET_IPV4_CONF_MAX
498 };
499
500 /* /proc/sys/net/ipv4/netfilter */
501 enum
502 {
503 NET_IPV4_NF_CONNTRACK_MAX=1,
504 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
505 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
506 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
507 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
508 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
509 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
510 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
511 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
512 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
513 NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
514 NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
515 NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
516 NET_IPV4_NF_CONNTRACK_BUCKETS=14,
517 NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
518 NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
519 NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
520 NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
521 NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
522 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
523 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
524 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
525 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
526 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
527 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
528 NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
529 NET_IPV4_NF_CONNTRACK_COUNT=27,
530 NET_IPV4_NF_CONNTRACK_CHECKSUM=28,
531 };
532
533 /* /proc/sys/net/ipv6 */
534 enum {
535 NET_IPV6_CONF=16,
536 NET_IPV6_NEIGH=17,
537 NET_IPV6_ROUTE=18,
538 NET_IPV6_ICMP=19,
539 NET_IPV6_BINDV6ONLY=20,
540 NET_IPV6_IP6FRAG_HIGH_THRESH=21,
541 NET_IPV6_IP6FRAG_LOW_THRESH=22,
542 NET_IPV6_IP6FRAG_TIME=23,
543 NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
544 NET_IPV6_MLD_MAX_MSF=25,
545 };
546
547 enum {
548 NET_IPV6_ROUTE_FLUSH=1,
549 NET_IPV6_ROUTE_GC_THRESH=2,
550 NET_IPV6_ROUTE_MAX_SIZE=3,
551 NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
552 NET_IPV6_ROUTE_GC_TIMEOUT=5,
553 NET_IPV6_ROUTE_GC_INTERVAL=6,
554 NET_IPV6_ROUTE_GC_ELASTICITY=7,
555 NET_IPV6_ROUTE_MTU_EXPIRES=8,
556 NET_IPV6_ROUTE_MIN_ADVMSS=9,
557 NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS=10
558 };
559
560 enum {
561 NET_IPV6_FORWARDING=1,
562 NET_IPV6_HOP_LIMIT=2,
563 NET_IPV6_MTU=3,
564 NET_IPV6_ACCEPT_RA=4,
565 NET_IPV6_ACCEPT_REDIRECTS=5,
566 NET_IPV6_AUTOCONF=6,
567 NET_IPV6_DAD_TRANSMITS=7,
568 NET_IPV6_RTR_SOLICITS=8,
569 NET_IPV6_RTR_SOLICIT_INTERVAL=9,
570 NET_IPV6_RTR_SOLICIT_DELAY=10,
571 NET_IPV6_USE_TEMPADDR=11,
572 NET_IPV6_TEMP_VALID_LFT=12,
573 NET_IPV6_TEMP_PREFERED_LFT=13,
574 NET_IPV6_REGEN_MAX_RETRY=14,
575 NET_IPV6_MAX_DESYNC_FACTOR=15,
576 NET_IPV6_MAX_ADDRESSES=16,
577 NET_IPV6_FORCE_MLD_VERSION=17,
578 NET_IPV6_ACCEPT_RA_DEFRTR=18,
579 NET_IPV6_ACCEPT_RA_PINFO=19,
580 NET_IPV6_ACCEPT_RA_RTR_PREF=20,
581 NET_IPV6_RTR_PROBE_INTERVAL=21,
582 NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
583 NET_IPV6_PROXY_NDP=23,
584 NET_IPV6_ACCEPT_SOURCE_ROUTE=25,
585 __NET_IPV6_MAX
586 };
587
588 /* /proc/sys/net/ipv6/icmp */
589 enum {
590 NET_IPV6_ICMP_RATELIMIT=1
591 };
592
593 /* /proc/sys/net/<protocol>/neigh/<dev> */
594 enum {
595 NET_NEIGH_MCAST_SOLICIT=1,
596 NET_NEIGH_UCAST_SOLICIT=2,
597 NET_NEIGH_APP_SOLICIT=3,
598 NET_NEIGH_RETRANS_TIME=4,
599 NET_NEIGH_REACHABLE_TIME=5,
600 NET_NEIGH_DELAY_PROBE_TIME=6,
601 NET_NEIGH_GC_STALE_TIME=7,
602 NET_NEIGH_UNRES_QLEN=8,
603 NET_NEIGH_PROXY_QLEN=9,
604 NET_NEIGH_ANYCAST_DELAY=10,
605 NET_NEIGH_PROXY_DELAY=11,
606 NET_NEIGH_LOCKTIME=12,
607 NET_NEIGH_GC_INTERVAL=13,
608 NET_NEIGH_GC_THRESH1=14,
609 NET_NEIGH_GC_THRESH2=15,
610 NET_NEIGH_GC_THRESH3=16,
611 NET_NEIGH_RETRANS_TIME_MS=17,
612 NET_NEIGH_REACHABLE_TIME_MS=18,
613 __NET_NEIGH_MAX
614 };
615
616 /* /proc/sys/net/dccp */
617 enum {
618 NET_DCCP_DEFAULT=1,
619 };
620
621 /* /proc/sys/net/ipx */
622 enum {
623 NET_IPX_PPROP_BROADCASTING=1,
624 NET_IPX_FORWARDING=2
625 };
626
627 /* /proc/sys/net/llc */
628 enum {
629 NET_LLC2=1,
630 NET_LLC_STATION=2,
631 };
632
633 /* /proc/sys/net/llc/llc2 */
634 enum {
635 NET_LLC2_TIMEOUT=1,
636 };
637
638 /* /proc/sys/net/llc/station */
639 enum {
640 NET_LLC_STATION_ACK_TIMEOUT=1,
641 };
642
643 /* /proc/sys/net/llc/llc2/timeout */
644 enum {
645 NET_LLC2_ACK_TIMEOUT=1,
646 NET_LLC2_P_TIMEOUT=2,
647 NET_LLC2_REJ_TIMEOUT=3,
648 NET_LLC2_BUSY_TIMEOUT=4,
649 };
650
651 /* /proc/sys/net/appletalk */
652 enum {
653 NET_ATALK_AARP_EXPIRY_TIME=1,
654 NET_ATALK_AARP_TICK_TIME=2,
655 NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
656 NET_ATALK_AARP_RESOLVE_TIME=4
657 };
658
659
660 /* /proc/sys/net/netrom */
661 enum {
662 NET_NETROM_DEFAULT_PATH_QUALITY=1,
663 NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
664 NET_NETROM_NETWORK_TTL_INITIALISER=3,
665 NET_NETROM_TRANSPORT_TIMEOUT=4,
666 NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
667 NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
668 NET_NETROM_TRANSPORT_BUSY_DELAY=7,
669 NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
670 NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
671 NET_NETROM_ROUTING_CONTROL=10,
672 NET_NETROM_LINK_FAILS_COUNT=11,
673 NET_NETROM_RESET=12
674 };
675
676 /* /proc/sys/net/ax25 */
677 enum {
678 NET_AX25_IP_DEFAULT_MODE=1,
679 NET_AX25_DEFAULT_MODE=2,
680 NET_AX25_BACKOFF_TYPE=3,
681 NET_AX25_CONNECT_MODE=4,
682 NET_AX25_STANDARD_WINDOW=5,
683 NET_AX25_EXTENDED_WINDOW=6,
684 NET_AX25_T1_TIMEOUT=7,
685 NET_AX25_T2_TIMEOUT=8,
686 NET_AX25_T3_TIMEOUT=9,
687 NET_AX25_IDLE_TIMEOUT=10,
688 NET_AX25_N2=11,
689 NET_AX25_PACLEN=12,
690 NET_AX25_PROTOCOL=13,
691 NET_AX25_DAMA_SLAVE_TIMEOUT=14
692 };
693
694 /* /proc/sys/net/rose */
695 enum {
696 NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
697 NET_ROSE_CALL_REQUEST_TIMEOUT=2,
698 NET_ROSE_RESET_REQUEST_TIMEOUT=3,
699 NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
700 NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
701 NET_ROSE_ROUTING_CONTROL=6,
702 NET_ROSE_LINK_FAIL_TIMEOUT=7,
703 NET_ROSE_MAX_VCS=8,
704 NET_ROSE_WINDOW_SIZE=9,
705 NET_ROSE_NO_ACTIVITY_TIMEOUT=10
706 };
707
708 /* /proc/sys/net/x25 */
709 enum {
710 NET_X25_RESTART_REQUEST_TIMEOUT=1,
711 NET_X25_CALL_REQUEST_TIMEOUT=2,
712 NET_X25_RESET_REQUEST_TIMEOUT=3,
713 NET_X25_CLEAR_REQUEST_TIMEOUT=4,
714 NET_X25_ACK_HOLD_BACK_TIMEOUT=5,
715 NET_X25_FORWARD=6
716 };
717
718 /* /proc/sys/net/token-ring */
719 enum
720 {
721 NET_TR_RIF_TIMEOUT=1
722 };
723
724 /* /proc/sys/net/decnet/ */
725 enum {
726 NET_DECNET_NODE_TYPE = 1,
727 NET_DECNET_NODE_ADDRESS = 2,
728 NET_DECNET_NODE_NAME = 3,
729 NET_DECNET_DEFAULT_DEVICE = 4,
730 NET_DECNET_TIME_WAIT = 5,
731 NET_DECNET_DN_COUNT = 6,
732 NET_DECNET_DI_COUNT = 7,
733 NET_DECNET_DR_COUNT = 8,
734 NET_DECNET_DST_GC_INTERVAL = 9,
735 NET_DECNET_CONF = 10,
736 NET_DECNET_NO_FC_MAX_CWND = 11,
737 NET_DECNET_MEM = 12,
738 NET_DECNET_RMEM = 13,
739 NET_DECNET_WMEM = 14,
740 NET_DECNET_DEBUG_LEVEL = 255
741 };
742
743 /* /proc/sys/net/decnet/conf/<dev> */
744 enum {
745 NET_DECNET_CONF_LOOPBACK = -2,
746 NET_DECNET_CONF_DDCMP = -3,
747 NET_DECNET_CONF_PPP = -4,
748 NET_DECNET_CONF_X25 = -5,
749 NET_DECNET_CONF_GRE = -6,
750 NET_DECNET_CONF_ETHER = -7
751
752 /* ... and ifindex of devices */
753 };
754
755 /* /proc/sys/net/decnet/conf/<dev>/ */
756 enum {
757 NET_DECNET_CONF_DEV_PRIORITY = 1,
758 NET_DECNET_CONF_DEV_T1 = 2,
759 NET_DECNET_CONF_DEV_T2 = 3,
760 NET_DECNET_CONF_DEV_T3 = 4,
761 NET_DECNET_CONF_DEV_FORWARDING = 5,
762 NET_DECNET_CONF_DEV_BLKSIZE = 6,
763 NET_DECNET_CONF_DEV_STATE = 7
764 };
765
766 /* /proc/sys/net/sctp */
767 enum {
768 NET_SCTP_RTO_INITIAL = 1,
769 NET_SCTP_RTO_MIN = 2,
770 NET_SCTP_RTO_MAX = 3,
771 NET_SCTP_RTO_ALPHA = 4,
772 NET_SCTP_RTO_BETA = 5,
773 NET_SCTP_VALID_COOKIE_LIFE = 6,
774 NET_SCTP_ASSOCIATION_MAX_RETRANS = 7,
775 NET_SCTP_PATH_MAX_RETRANS = 8,
776 NET_SCTP_MAX_INIT_RETRANSMITS = 9,
777 NET_SCTP_HB_INTERVAL = 10,
778 NET_SCTP_PRESERVE_ENABLE = 11,
779 NET_SCTP_MAX_BURST = 12,
780 NET_SCTP_ADDIP_ENABLE = 13,
781 NET_SCTP_PRSCTP_ENABLE = 14,
782 NET_SCTP_SNDBUF_POLICY = 15,
783 NET_SCTP_SACK_TIMEOUT = 16,
784 NET_SCTP_RCVBUF_POLICY = 17,
785 };
786
787 /* /proc/sys/net/bridge */
788 enum {
789 NET_BRIDGE_NF_CALL_ARPTABLES = 1,
790 NET_BRIDGE_NF_CALL_IPTABLES = 2,
791 NET_BRIDGE_NF_CALL_IP6TABLES = 3,
792 NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
793 };
794
795 /* CTL_FS names: */
796 enum
797 {
798 FS_NRINODE=1, /* int:current number of allocated inodes */
799 FS_STATINODE=2,
800 FS_MAXINODE=3, /* int:maximum number of inodes that can be allocated */
801 FS_NRDQUOT=4, /* int:current number of allocated dquots */
802 FS_MAXDQUOT=5, /* int:maximum number of dquots that can be allocated */
803 FS_NRFILE=6, /* int:current number of allocated filedescriptors */
804 FS_MAXFILE=7, /* int:maximum number of filedescriptors that can be allocated */
805 FS_DENTRY=8,
806 FS_NRSUPER=9, /* int:current number of allocated super_blocks */
807 FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
808 FS_OVERFLOWUID=11, /* int: overflow UID */
809 FS_OVERFLOWGID=12, /* int: overflow GID */
810 FS_LEASES=13, /* int: leases enabled */
811 FS_DIR_NOTIFY=14, /* int: directory notification enabled */
812 FS_LEASE_TIME=15, /* int: maximum time to wait for a lease break */
813 FS_DQSTATS=16, /* disc quota usage statistics and control */
814 FS_XFS=17, /* struct: control xfs parameters */
815 FS_AIO_NR=18, /* current system-wide number of aio requests */
816 FS_AIO_MAX_NR=19, /* system-wide maximum number of aio requests */
817 FS_INOTIFY=20, /* inotify submenu */
818 FS_OCFS2=988, /* ocfs2 */
819 };
820
821 /* /proc/sys/fs/quota/ */
822 enum {
823 FS_DQ_LOOKUPS = 1,
824 FS_DQ_DROPS = 2,
825 FS_DQ_READS = 3,
826 FS_DQ_WRITES = 4,
827 FS_DQ_CACHE_HITS = 5,
828 FS_DQ_ALLOCATED = 6,
829 FS_DQ_FREE = 7,
830 FS_DQ_SYNCS = 8,
831 FS_DQ_WARNINGS = 9,
832 };
833
834 /* CTL_DEBUG names: */
835
836 /* CTL_DEV names: */
837 enum {
838 DEV_CDROM=1,
839 DEV_HWMON=2,
840 DEV_PARPORT=3,
841 DEV_RAID=4,
842 DEV_MAC_HID=5,
843 DEV_SCSI=6,
844 DEV_IPMI=7,
845 };
846
847 /* /proc/sys/dev/cdrom */
848 enum {
849 DEV_CDROM_INFO=1,
850 DEV_CDROM_AUTOCLOSE=2,
851 DEV_CDROM_AUTOEJECT=3,
852 DEV_CDROM_DEBUG=4,
853 DEV_CDROM_LOCK=5,
854 DEV_CDROM_CHECK_MEDIA=6
855 };
856
857 /* /proc/sys/dev/parport */
858 enum {
859 DEV_PARPORT_DEFAULT=-3
860 };
861
862 /* /proc/sys/dev/raid */
863 enum {
864 DEV_RAID_SPEED_LIMIT_MIN=1,
865 DEV_RAID_SPEED_LIMIT_MAX=2
866 };
867
868 /* /proc/sys/dev/parport/default */
869 enum {
870 DEV_PARPORT_DEFAULT_TIMESLICE=1,
871 DEV_PARPORT_DEFAULT_SPINTIME=2
872 };
873
874 /* /proc/sys/dev/parport/parport n */
875 enum {
876 DEV_PARPORT_SPINTIME=1,
877 DEV_PARPORT_BASE_ADDR=2,
878 DEV_PARPORT_IRQ=3,
879 DEV_PARPORT_DMA=4,
880 DEV_PARPORT_MODES=5,
881 DEV_PARPORT_DEVICES=6,
882 DEV_PARPORT_AUTOPROBE=16
883 };
884
885 /* /proc/sys/dev/parport/parport n/devices/ */
886 enum {
887 DEV_PARPORT_DEVICES_ACTIVE=-3,
888 };
889
890 /* /proc/sys/dev/parport/parport n/devices/device n */
891 enum {
892 DEV_PARPORT_DEVICE_TIMESLICE=1,
893 };
894
895 /* /proc/sys/dev/mac_hid */
896 enum {
897 DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
898 DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
899 DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
900 DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
901 DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
902 DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
903 };
904
905 /* /proc/sys/dev/scsi */
906 enum {
907 DEV_SCSI_LOGGING_LEVEL=1,
908 };
909
910 /* /proc/sys/dev/ipmi */
911 enum {
912 DEV_IPMI_POWEROFF_POWERCYCLE=1,
913 };
914
915 /* /proc/sys/abi */
916 enum
917 {
918 ABI_DEFHANDLER_COFF=1, /* default handler for coff binaries */
919 ABI_DEFHANDLER_ELF=2, /* default handler for ELF binaries */
920 ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
921 ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
922 ABI_TRACE=5, /* tracing flags */
923 ABI_FAKE_UTSNAME=6, /* fake target utsname information */
924 };
925
926 #ifdef __KERNEL__
927 #include <linux/list.h>
928
929 /* For the /proc/sys support */
930 struct ctl_table;
931 extern struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev);
932 extern void sysctl_head_finish(struct ctl_table_header *prev);
933 extern int sysctl_perm(struct ctl_table *table, int op);
934
935 typedef struct ctl_table ctl_table;
936
937 typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,
938 void __user *oldval, size_t __user *oldlenp,
939 void __user *newval, size_t newlen);
940
941 typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
942 void __user *buffer, size_t *lenp, loff_t *ppos);
943
944 extern int proc_dostring(ctl_table *, int, struct file *,
945 void __user *, size_t *, loff_t *);
946 extern int proc_dointvec(ctl_table *, int, struct file *,
947 void __user *, size_t *, loff_t *);
948 extern int proc_dointvec_bset(ctl_table *, int, struct file *,
949 void __user *, size_t *, loff_t *);
950 extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
951 void __user *, size_t *, loff_t *);
952 extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
953 void __user *, size_t *, loff_t *);
954 extern int proc_dointvec_userhz_jiffies(ctl_table *, int, struct file *,
955 void __user *, size_t *, loff_t *);
956 extern int proc_dointvec_ms_jiffies(ctl_table *, int, struct file *,
957 void __user *, size_t *, loff_t *);
958 extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
959 void __user *, size_t *, loff_t *);
960 extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
961 struct file *, void __user *, size_t *, loff_t *);
962
963 extern int do_sysctl (int __user *name, int nlen,
964 void __user *oldval, size_t __user *oldlenp,
965 void __user *newval, size_t newlen);
966
967 extern int do_sysctl_strategy (ctl_table *table,
968 int __user *name, int nlen,
969 void __user *oldval, size_t __user *oldlenp,
970 void __user *newval, size_t newlen);
971
972 extern ctl_handler sysctl_string;
973 extern ctl_handler sysctl_intvec;
974 extern ctl_handler sysctl_jiffies;
975 extern ctl_handler sysctl_ms_jiffies;
976
977
978 /*
979 * Register a set of sysctl names by calling register_sysctl_table
980 * with an initialised array of ctl_table's. An entry with zero
981 * ctl_name and NULL procname terminates the table. table->de will be
982 * set up by the registration and need not be initialised in advance.
983 *
984 * sysctl names can be mirrored automatically under /proc/sys. The
985 * procname supplied controls /proc naming.
986 *
987 * The table's mode will be honoured both for sys_sysctl(2) and
988 * proc-fs access.
989 *
990 * Leaf nodes in the sysctl tree will be represented by a single file
991 * under /proc; non-leaf nodes will be represented by directories. A
992 * null procname disables /proc mirroring at this node.
993 *
994 * sysctl entries with a zero ctl_name will not be available through
995 * the binary sysctl interface.
996 *
997 * sysctl(2) can automatically manage read and write requests through
998 * the sysctl table. The data and maxlen fields of the ctl_table
999 * struct enable minimal validation of the values being written to be
1000 * performed, and the mode field allows minimal authentication.
1001 *
1002 * More sophisticated management can be enabled by the provision of a
1003 * strategy routine with the table entry. This will be called before
1004 * any automatic read or write of the data is performed.
1005 *
1006 * The strategy routine may return:
1007 * <0: Error occurred (error is passed to user process)
1008 * 0: OK - proceed with automatic read or write.
1009 * >0: OK - read or write has been done by the strategy routine, so
1010 * return immediately.
1011 *
1012 * There must be a proc_handler routine for any terminal nodes
1013 * mirrored under /proc/sys (non-terminals are handled by a built-in
1014 * directory handler). Several default handlers are available to
1015 * cover common cases.
1016 */
1017
1018 /* A sysctl table is an array of struct ctl_table: */
1019 struct ctl_table
1020 {
1021 int ctl_name; /* Binary ID */
1022 const char *procname; /* Text ID for /proc/sys, or zero */
1023 void *data;
1024 int maxlen;
1025 mode_t mode;
1026 ctl_table *child;
1027 ctl_table *parent; /* Automatically set */
1028 proc_handler *proc_handler; /* Callback for text formatting */
1029 ctl_handler *strategy; /* Callback function for all r/w */
1030 void *extra1;
1031 void *extra2;
1032 };
1033
1034 /* struct ctl_table_header is used to maintain dynamic lists of
1035 ctl_table trees. */
1036 struct ctl_table_header
1037 {
1038 ctl_table *ctl_table;
1039 struct list_head ctl_entry;
1040 int used;
1041 struct completion *unregistering;
1042 };
1043
1044 struct ctl_table_header * register_sysctl_table(ctl_table * table);
1045
1046 void unregister_sysctl_table(struct ctl_table_header * table);
1047
1048 #else /* __KERNEL__ */
1049
1050 #endif /* __KERNEL__ */
1051
1052 #endif /* _LINUX_SYSCTL_H */
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