summaryrefslogtreecommitdiffstats
path: root/include/linux/sysctl.h
blob: 23032d9d607154fd48e41422f346c3ddcb8e72e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
/*
 * sysctl.h: General linux system control interface
 *
 * Begun 24 March 1995, Stephen Tweedie
 *
 ****************************************************************
 ****************************************************************
 **
 **  The values in this file are exported to user space via 
 **  the sysctl() binary interface.  However this interface
 **  is unstable and deprecated and will be removed in the future. 
 **  For a stable interface use /proc/sys.
 **
 ****************************************************************
 ****************************************************************
 */

#ifndef _LINUX_SYSCTL_H
#define _LINUX_SYSCTL_H

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/compiler.h>

struct file;

#define CTL_MAXNAME 10		/* how many path components do we allow in a
				   call to sysctl?   In other words, what is
				   the largest acceptable value for the nlen
				   member of a struct __sysctl_args to have? */

struct __sysctl_args {
	int __user *name;
	int nlen;
	void __user *oldval;
	size_t __user *oldlenp;
	void __user *newval;
	size_t newlen;
	unsigned long __unused[4];
};

/* Define sysctl names first */

/* Top-level names: */

/* For internal pattern-matching use only: */
#ifdef __KERNEL__
#define CTL_ANY		-1	/* Matches any name */
#define CTL_NONE	0
#endif

enum
{
	CTL_KERN=1,		/* General kernel info and control */
	CTL_VM=2,		/* VM management */
	CTL_NET=3,		/* Networking */
	CTL_PROC=4,		/* Process info */
	CTL_FS=5,		/* Filesystems */
	CTL_DEBUG=6,		/* Debugging */
	CTL_DEV=7,		/* Devices */
	CTL_BUS=8,		/* Busses */
	CTL_ABI=9,		/* Binary emulation */
	CTL_CPU=10		/* CPU stuff (speed scaling, etc) */
};

/* CTL_BUS names: */
enum
{
	CTL_BUS_ISA=1		/* ISA */
};

/* CTL_KERN names: */
enum
{
	KERN_OSTYPE=1,		/* string: system version */
	KERN_OSRELEASE=2,	/* string: system release */
	KERN_OSREV=3,		/* int: system revision */
	KERN_VERSION=4,		/* string: compile time info */
	KERN_SECUREMASK=5,	/* struct: maximum rights mask */
	KERN_PROF=6,		/* table: profiling information */
	KERN_NODENAME=7,
	KERN_DOMAINNAME=8,

	KERN_CAP_BSET=14,	/* int: capability bounding set */
	KERN_PANIC=15,		/* int: panic timeout */
	KERN_REALROOTDEV=16,	/* real root device to mount after initrd */

	KERN_SPARC_REBOOT=21,	/* reboot command on Sparc */
	KERN_CTLALTDEL=22,	/* int: allow ctl-alt-del to reboot */
	KERN_PRINTK=23,		/* struct: control printk logging parameters */
	KERN_NAMETRANS=24,	/* Name translation */
	KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */
	KERN_PPC_ZEROPAGED=26,	/* turn idle page zeroing on/off on PPC */
	KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */
	KERN_MODPROBE=28,
	KERN_SG_BIG_BUFF=29,
	KERN_ACCT=30,		/* BSD process accounting parameters */
	KERN_PPC_L2CR=31,	/* l2cr register on PPC */

	KERN_RTSIGNR=32,	/* Number of rt sigs queued */
	KERN_RTSIGMAX=33,	/* Max queuable */
	
	KERN_SHMMAX=34,         /* long: Maximum shared memory segment */
	KERN_MSGMAX=35,         /* int: Maximum size of a messege */
	KERN_MSGMNB=36,         /* int: Maximum message queue size */
	KERN_MSGPOOL=37,        /* int: Maximum system message pool size */
	KERN_SYSRQ=38,		/* int: Sysreq enable */
	KERN_MAX_THREADS=39,	/* int: Maximum nr of threads in the system */
 	KERN_RANDOM=40,		/* Random driver */
 	KERN_SHMALL=41,		/* int: Maximum size of shared memory */
 	KERN_MSGMNI=42,		/* int: msg queue identifiers */
 	KERN_SEM=43,		/* struct: sysv semaphore limits */
 	KERN_SPARC_STOP_A=44,	/* int: Sparc Stop-A enable */
 	KERN_SHMMNI=45,		/* int: shm array identifiers */
	KERN_OVERFLOWUID=46,	/* int: overflow UID */
	KERN_OVERFLOWGID=47,	/* int: overflow GID */
	KERN_SHMPATH=48,	/* string: path to shm fs */
	KERN_HOTPLUG=49,	/* string: path to hotplug policy agent */
	KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
	KERN_S390_USER_DEBUG_LOGGING=51,  /* int: dumps of user faults */
	KERN_CORE_USES_PID=52,		/* int: use core or core.%pid */
	KERN_TAINTED=53,	/* int: various kernel tainted flags */
	KERN_CADPID=54,		/* int: PID of the process to notify on CAD */
	KERN_PIDMAX=55,		/* int: PID # limit */
  	KERN_CORE_PATTERN=56,	/* string: pattern for core-file names */
	KERN_PANIC_ON_OOPS=57,  /* int: whether we will panic on an oops */
	KERN_HPPA_PWRSW=58,	/* int: hppa soft-power enable */
	KERN_HPPA_UNALIGNED=59,	/* int: hppa unaligned-trap enable */
	KERN_PRINTK_RATELIMIT=60, /* int: tune printk ratelimiting */
	KERN_PRINTK_RATELIMIT_BURST=61,	/* int: tune printk ratelimiting */
	KERN_PTY=62,		/* dir: pty driver */
	KERN_NGROUPS_MAX=63,	/* int: NGROUPS_MAX */
	KERN_SPARC_SCONS_PWROFF=64, /* int: serial console power-off halt */
	KERN_HZ_TIMER=65,	/* int: hz timer on or off */
	KERN_UNKNOWN_NMI_PANIC=66, /* int: unknown nmi panic flag */
	KERN_BOOTLOADER_TYPE=67, /* int: boot loader type */
	KERN_RANDOMIZE=68, /* int: randomize virtual address space */
};


/* CTL_VM names: */
enum
{
	VM_UNUSED1=1,		/* was: struct: Set vm swapping control */
	VM_UNUSED2=2,		/* was; int: Linear or sqrt() swapout for hogs */
	VM_UNUSED3=3,		/* was: struct: Set free page thresholds */
	VM_UNUSED4=4,		/* Spare */
	VM_OVERCOMMIT_MEMORY=5,	/* Turn off the virtual memory safety limit */
	VM_UNUSED5=6,		/* was: struct: Set buffer memory thresholds */
	VM_UNUSED7=7,		/* was: struct: Set cache memory thresholds */
	VM_UNUSED8=8,		/* was: struct: Control kswapd behaviour */
	VM_UNUSED9=9,		/* was: struct: Set page table cache parameters */
	VM_PAGE_CLUSTER=10,	/* int: set number of pages to swap together */
	VM_DIRTY_BACKGROUND=11,	/* dirty_background_ratio */
	VM_DIRTY_RATIO=12,	/* dirty_ratio */
	VM_DIRTY_WB_CS=13,	/* dirty_writeback_centisecs */
	VM_DIRTY_EXPIRE_CS=14,	/* dirty_expire_centisecs */
	VM_NR_PDFLUSH_THREADS=15, /* nr_pdflush_threads */
	VM_OVERCOMMIT_RATIO=16, /* percent of RAM to allow overcommit in */
	VM_PAGEBUF=17,		/* struct: Control pagebuf parameters */
	VM_HUGETLB_PAGES=18,	/* int: Number of available Huge Pages */
	VM_SWAPPINESS=19,	/* Tendency to steal mapped memory */
	VM_LOWMEM_RESERVE_RATIO=20,/* reservation ratio for lower memory zones */
	VM_MIN_FREE_KBYTES=21,	/* Minimum free kilobytes to maintain */
	VM_MAX_MAP_COUNT=22,	/* int: Maximum number of mmaps/address-space */
	VM_LAPTOP_MODE=23,	/* vm laptop mode */
	VM_BLOCK_DUMP=24,	/* block dump mode */
	VM_HUGETLB_GROUP=25,	/* permitted hugetlb group */
	VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */
	VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */
	VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */
};


/* CTL_NET names: */
enum
{
	NET_CORE=1,
	NET_ETHER=2,
	NET_802=3,
	NET_UNIX=4,
	NET_IPV4=5,
	NET_IPX=6,
	NET_ATALK=7,
	NET_NETROM=8,
	NET_AX25=9,
	NET_BRIDGE=10,
	NET_ROSE=11,
	NET_IPV6=12,
	NET_X25=13,
	NET_TR=14,
	NET_DECNET=15,
	NET_ECONET=16,
	NET_SCTP=17, 
};

/* /proc/sys/kernel/random */
enum
{
	RANDOM_POOLSIZE=1,
	RANDOM_ENTROPY_COUNT=2,
	RANDOM_READ_THRESH=3,
	RANDOM_WRITE_THRESH=4,
	RANDOM_BOOT_ID=5,
	RANDOM_UUID=6
};

/* /proc/sys/kernel/pty */
enum
{
	PTY_MAX=1,
	PTY_NR=2
};

/* /proc/sys/bus/isa */
enum
{
	BUS_ISA_MEM_BASE=1,
	BUS_ISA_PORT_BASE=2,
	BUS_ISA_PORT_SHIFT=3
};

/* /proc/sys/net/core */
enum
{
	NET_CORE_WMEM_MAX=1,
	NET_CORE_RMEM_MAX=2,
	NET_CORE_WMEM_DEFAULT=3,
	NET_CORE_RMEM_DEFAULT=4,
/* was	NET_CORE_DESTROY_DELAY */
	NET_CORE_MAX_BACKLOG=6,
	NET_CORE_FASTROUTE=7,
	NET_CORE_MSG_COST=8,
	NET_CORE_MSG_BURST=9,
	NET_CORE_OPTMEM_MAX=10,
	NET_CORE_HOT_LIST_LENGTH=11,
	NET_CORE_DIVERT_VERSION=12,
	NET_CORE_NO_CONG_THRESH=13,
	NET_CORE_NO_CONG=14,
	NET_CORE_LO_CONG=15,
	NET_CORE_MOD_CONG=16,
	NET_CORE_DEV_WEIGHT=17,
	NET_CORE_SOMAXCONN=18,
};

/* /proc/sys/net/ethernet */

/* /proc/sys/net/802 */

/* /proc/sys/net/unix */

enum
{
	NET_UNIX_DESTROY_DELAY=1,
	NET_UNIX_DELETE_DELAY=2,
	NET_UNIX_MAX_DGRAM_QLEN=3,
};

/* /proc/sys/net/ipv4 */
enum
{
	/* v2.0 compatibile variables */
	NET_IPV4_FORWARD=8,
	NET_IPV4_DYNADDR=9,

	NET_IPV4_CONF=16,
	NET_IPV4_NEIGH=17,
	NET_IPV4_ROUTE=18,
	NET_IPV4_FIB_HASH=19,
	NET_IPV4_NETFILTER=20,

	NET_IPV4_TCP_TIMESTAMPS=33,
	NET_IPV4_TCP_WINDOW_SCALING=34,
	NET_IPV4_TCP_SACK=35,
	NET_IPV4_TCP_RETRANS_COLLAPSE=36,
	NET_IPV4_DEFAULT_TTL=37,
	NET_IPV4_AUTOCONFIG=38,
	NET_IPV4_NO_PMTU_DISC=39,
	NET_IPV4_TCP_SYN_RETRIES=40,
	NET_IPV4_IPFRAG_HIGH_THRESH=41,
	NET_IPV4_IPFRAG_LOW_THRESH=42,
	NET_IPV4_IPFRAG_TIME=43,
	NET_IPV4_TCP_MAX_KA_PROBES=44,
	NET_IPV4_TCP_KEEPALIVE_TIME=45,
	NET_IPV4_TCP_KEEPALIVE_PROBES=46,
	NET_IPV4_TCP_RETRIES1=47,
	NET_IPV4_TCP_RETRIES2=48,
	NET_IPV4_TCP_FIN_TIMEOUT=49,
	NET_IPV4_IP_MASQ_DEBUG=50,
	NET_TCP_SYNCOOKIES=51,
	NET_TCP_STDURG=52,
	NET_TCP_RFC1337=53,
	NET_TCP_SYN_TAILDROP=54,
	NET_TCP_MAX_SYN_BACKLOG=55,
	NET_IPV4_LOCAL_PORT_RANGE=56,
	NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
	NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
	NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
	NET_IPV4_ICMP_DESTUNREACH_RATE=60,
	NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
	NET_IPV4_ICMP_PARAMPROB_RATE=62,
	NET_IPV4_ICMP_ECHOREPLY_RATE=63,
	NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
	NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
	NET_TCP_TW_RECYCLE=66,
	NET_IPV4_ALWAYS_DEFRAG=67,
	NET_IPV4_TCP_KEEPALIVE_INTVL=68,
	NET_IPV4_INET_PEER_THRESHOLD=69,
	NET_IPV4_INET_PEER_MINTTL=70,
	NET_IPV4_INET_PEER_MAXTTL=71,
	NET_IPV4_INET_PEER_GC_MINTIME=72,
	NET_IPV4_INET_PEER_GC_MAXTIME=73,
	NET_TCP_ORPHAN_RETRIES=74,
	NET_TCP_ABORT_ON_OVERFLOW=75,
	NET_TCP_SYNACK_RETRIES=76,
	NET_TCP_MAX_ORPHANS=77,
	NET_TCP_MAX_TW_BUCKETS=78,
	NET_TCP_FACK=79,
	NET_TCP_REORDERING=80,
	NET_TCP_ECN=81,
	NET_TCP_DSACK=82,
	NET_TCP_MEM=83,
	NET_TCP_WMEM=84,
	NET_TCP_RMEM=85,
	NET_TCP_APP_WIN=86,
	NET_TCP_ADV_WIN_SCALE=87,
	NET_IPV4_NONLOCAL_BIND=88,
	NET_IPV4_ICMP_RATELIMIT=89,
	NET_IPV4_ICMP_RATEMASK=90,
	NET_TCP_TW_REUSE=91,
	NET_TCP_FRTO=92,
	NET_TCP_LOW_LATENCY=93,
	NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
	NET_TCP_WESTWOOD=95,
	NET_IPV4_IGMP_MAX_MSF=96,
	NET_TCP_NO_METRICS_SAVE=97,
	NET_TCP_VEGAS=98,
	NET_TCP_VEGAS_ALPHA=99,
	NET_TCP_VEGAS_BETA=100,
	NET_TCP_VEGAS_GAMMA=101,
 	NET_TCP_BIC=102,
 	NET_TCP_BIC_FAST_CONVERGENCE=103,
	NET_TCP_BIC_LOW_WINDOW=104,
	NET_TCP_DEFAULT_WIN_SCALE=105,
	NET_TCP_MODERATE_RCVBUF=106,
	NET_TCP_TSO_WIN_DIVISOR=107,
	NET_TCP_BIC_BETA=108,
};

enum {
	NET_IPV4_ROUTE_FLUSH=1,
	NET_IPV4_ROUTE_MIN_DELAY=2,
	NET_IPV4_ROUTE_MAX_DELAY=3,
	NET_IPV4_ROUTE_GC_THRESH=4,
	NET_IPV4_ROUTE_MAX_SIZE=5,
	NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
	NET_IPV4_ROUTE_GC_TIMEOUT=7,
	NET_IPV4_ROUTE_GC_INTERVAL=8,
	NET_IPV4_ROUTE_REDIRECT_LOAD=9,
	NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
	NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
	NET_IPV4_ROUTE_ERROR_COST=12,
	NET_IPV4_ROUTE_ERROR_BURST=13,
	NET_IPV4_ROUTE_GC_ELASTICITY=14,
	NET_IPV4_ROUTE_MTU_EXPIRES=15,
	NET_IPV4_ROUTE_MIN_PMTU=16,
	NET_IPV4_ROUTE_MIN_ADVMSS=17,
	NET_IPV4_ROUTE_SECRET_INTERVAL=18,
	NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS=19,
};

enum
{
	NET_PROTO_CONF_ALL=-2,
	NET_PROTO_CONF_DEFAULT=-3

	/* And device ifindices ... */
};

enum
{
	NET_IPV4_CONF_FORWARDING=1,
	NET_IPV4_CONF_MC_FORWARDING=2,
	NET_IPV4_CONF_PROXY_ARP=3,
	NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
	NET_IPV4_CONF_SECURE_REDIRECTS=5,
	NET_IPV4_CONF_SEND_REDIRECTS=6,
	NET_IPV4_CONF_SHARED_MEDIA=7,
	NET_IPV4_CONF_RP_FILTER=8,
	NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
	NET_IPV4_CONF_BOOTP_RELAY=10,
	NET_IPV4_CONF_LOG_MARTIANS=11,
	NET_IPV4_CONF_TAG=12,
	NET_IPV4_CONF_ARPFILTER=13,
	NET_IPV4_CONF_MEDIUM_ID=14,
	NET_IPV4_CONF_NOXFRM=15,
	NET_IPV4_CONF_NOPOLICY=16,
	NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
	NET_IPV4_CONF_ARP_ANNOUNCE=18,
	NET_IPV4_CONF_ARP_IGNORE=19,
	NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
	__NET_IPV4_CONF_MAX
};

/* /proc/sys/net/ipv4/netfilter */
enum
{
	NET_IPV4_NF_CONNTRACK_MAX=1,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
	NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
	NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
	NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
	NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
	NET_IPV4_NF_CONNTRACK_BUCKETS=14,
	NET_IPV4_NF_CONNTRACK_LOG_INVALID=15,
	NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS=16,
	NET_IPV4_NF_CONNTRACK_TCP_LOOSE=17,
	NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL=18,
	NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS=19,
 	NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED=20,
 	NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT=21,
 	NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED=22,
 	NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED=23,
 	NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT=24,
 	NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD=25,
 	NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT=26,
	NET_IPV4_NF_CONNTRACK_COUNT=27,
};
 
/* /proc/sys/net/ipv6 */
enum {
	NET_IPV6_CONF=16,
	NET_IPV6_NEIGH=17,
	NET_IPV6_ROUTE=18,
	NET_IPV6_ICMP=19,
	NET_IPV6_BINDV6ONLY=20,
	NET_IPV6_IP6FRAG_HIGH_THRESH=21,
	NET_IPV6_IP6FRAG_LOW_THRESH=22,
	NET_IPV6_IP6FRAG_TIME=23,
	NET_IPV6_IP6FRAG_SECRET_INTERVAL=24,
	NET_IPV6_MLD_MAX_MSF=25,
};

enum {
	NET_IPV6_ROUTE_FLUSH=1,
	NET_IPV6_ROUTE_GC_THRESH=2,
	NET_IPV6_ROUTE_MAX_SIZE=3,
	NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
	NET_IPV6_ROUTE_GC_TIMEOUT=5,
	NET_IPV6_ROUTE_GC_INTERVAL=6,
	NET_IPV6_ROUTE_GC_ELASTICITY=7,
	NET_IPV6_ROUTE_MTU_EXPIRES=8,
	NET_IPV6_ROUTE_MIN_ADVMSS=9,
	NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS=10
};

enum {
	NET_IPV6_FORWARDING=1,
	NET_IPV6_HOP_LIMIT=2,
	NET_IPV6_MTU=3,
	NET_IPV6_ACCEPT_RA=4,
	NET_IPV6_ACCEPT_REDIRECTS=5,
	NET_IPV6_AUTOCONF=6,
	NET_IPV6_DAD_TRANSMITS=7,
	NET_IPV6_RTR_SOLICITS=8,
	NET_IPV6_RTR_SOLICIT_INTERVAL=9,
	NET_IPV6_RTR_SOLICIT_DELAY=10,
	NET_IPV6_USE_TEMPADDR=11,
	NET_IPV6_TEMP_VALID_LFT=12,
	NET_IPV6_TEMP_PREFERED_LFT=13,
	NET_IPV6_REGEN_MAX_RETRY=14,
	NET_IPV6_MAX_DESYNC_FACTOR=15,
	NET_IPV6_MAX_ADDRESSES=16,
	NET_IPV6_FORCE_MLD_VERSION=17,
	__NET_IPV6_MAX
};

/* /proc/sys/net/ipv6/icmp */
enum {
	NET_IPV6_ICMP_RATELIMIT=1
};

/* /proc/sys/net/<protocol>/neigh/<dev> */
enum {
	NET_NEIGH_MCAST_SOLICIT=1,
	NET_NEIGH_UCAST_SOLICIT=2,
	NET_NEIGH_APP_SOLICIT=3,
	NET_NEIGH_RETRANS_TIME=4,
	NET_NEIGH_REACHABLE_TIME=5,
	NET_NEIGH_DELAY_PROBE_TIME=6,
	NET_NEIGH_GC_STALE_TIME=7,
	NET_NEIGH_UNRES_QLEN=8,
	NET_NEIGH_PROXY_QLEN=9,
	NET_NEIGH_ANYCAST_DELAY=10,
	NET_NEIGH_PROXY_DELAY=11,
	NET_NEIGH_LOCKTIME=12,
	NET_NEIGH_GC_INTERVAL=13,
	NET_NEIGH_GC_THRESH1=14,
	NET_NEIGH_GC_THRESH2=15,
	NET_NEIGH_GC_THRESH3=16,
	NET_NEIGH_RETRANS_TIME_MS=17,
	NET_NEIGH_REACHABLE_TIME_MS=18,
	__NET_NEIGH_MAX
};

/* /proc/sys/net/ipx */
enum {
	NET_IPX_PPROP_BROADCASTING=1,
	NET_IPX_FORWARDING=2
};


/* /proc/sys/net/appletalk */
enum {
	NET_ATALK_AARP_EXPIRY_TIME=1,
	NET_ATALK_AARP_TICK_TIME=2,
	NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
	NET_ATALK_AARP_RESOLVE_TIME=4
};


/* /proc/sys/net/netrom */
enum {
	NET_NETROM_DEFAULT_PATH_QUALITY=1,
	NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
	NET_NETROM_NETWORK_TTL_INITIALISER=3,
	NET_NETROM_TRANSPORT_TIMEOUT=4,
	NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
	NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
	NET_NETROM_TRANSPORT_BUSY_DELAY=7,
	NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
	NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
	NET_NETROM_ROUTING_CONTROL=10,
	NET_NETROM_LINK_FAILS_COUNT=11
};

/* /proc/sys/net/ax25 */
enum {
	NET_AX25_IP_DEFAULT_MODE=1,
	NET_AX25_DEFAULT_MODE=2,
	NET_AX25_BACKOFF_TYPE=3,
	NET_AX25_CONNECT_MODE=4,
	NET_AX25_STANDARD_WINDOW=5,
	NET_AX25_EXTENDED_WINDOW=6,
	NET_AX25_T1_TIMEOUT=7,
	NET_AX25_T2_TIMEOUT=8,
	NET_AX25_T3_TIMEOUT=9,
	NET_AX25_IDLE_TIMEOUT=10,
	NET_AX25_N2=11,
	NET_AX25_PACLEN=12,
	NET_AX25_PROTOCOL=13,
	NET_AX25_DAMA_SLAVE_TIMEOUT=14
};

/* /proc/sys/net/rose */
enum {
	NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
	NET_ROSE_CALL_REQUEST_TIMEOUT=2,
	NET_ROSE_RESET_REQUEST_TIMEOUT=3,
	NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
	NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
	NET_ROSE_ROUTING_CONTROL=6,
	NET_ROSE_LINK_FAIL_TIMEOUT=7,
	NET_ROSE_MAX_VCS=8,
	NET_ROSE_WINDOW_SIZE=9,
	NET_ROSE_NO_ACTIVITY_TIMEOUT=10
};

/* /proc/sys/net/x25 */
enum {
	NET_X25_RESTART_REQUEST_TIMEOUT=1,
	NET_X25_CALL_REQUEST_TIMEOUT=2,
	NET_X25_RESET_REQUEST_TIMEOUT=3,
	NET_X25_CLEAR_REQUEST_TIMEOUT=4,
	NET_X25_ACK_HOLD_BACK_TIMEOUT=5
};

/* /proc/sys/net/token-ring */
enum
{
	NET_TR_RIF_TIMEOUT=1
};

/* /proc/sys/net/decnet/ */
enum {
	NET_DECNET_NODE_TYPE = 1,
	NET_DECNET_NODE_ADDRESS = 2,
	NET_DECNET_NODE_NAME = 3,
	NET_DECNET_DEFAULT_DEVICE = 4,
	NET_DECNET_TIME_WAIT = 5,
	NET_DECNET_DN_COUNT = 6,
	NET_DECNET_DI_COUNT = 7,
	NET_DECNET_DR_COUNT = 8,
	NET_DECNET_DST_GC_INTERVAL = 9,
	NET_DECNET_CONF = 10,
	NET_DECNET_NO_FC_MAX_CWND = 11,
	NET_DECNET_DEBUG_LEVEL = 255
};

/* /proc/sys/net/decnet/conf/<dev> */
enum {
	NET_DECNET_CONF_LOOPBACK = -2,
	NET_DECNET_CONF_DDCMP = -3,
	NET_DECNET_CONF_PPP = -4,
	NET_DECNET_CONF_X25 = -5,
	NET_DECNET_CONF_GRE = -6,
	NET_DECNET_CONF_ETHER = -7

	/* ... and ifindex of devices */
};

/* /proc/sys/net/decnet/conf/<dev>/ */
enum {
	NET_DECNET_CONF_DEV_PRIORITY = 1,
	NET_DECNET_CONF_DEV_T1 = 2,
	NET_DECNET_CONF_DEV_T2 = 3,
	NET_DECNET_CONF_DEV_T3 = 4,
	NET_DECNET_CONF_DEV_FORWARDING = 5,
	NET_DECNET_CONF_DEV_BLKSIZE = 6,
	NET_DECNET_CONF_DEV_STATE = 7
};

/* /proc/sys/net/sctp */
enum {
	NET_SCTP_RTO_INITIAL = 1,
	NET_SCTP_RTO_MIN     = 2,
	NET_SCTP_RTO_MAX     = 3,
	NET_SCTP_RTO_ALPHA   = 4,
	NET_SCTP_RTO_BETA    = 5,
	NET_SCTP_VALID_COOKIE_LIFE       =  6,
	NET_SCTP_ASSOCIATION_MAX_RETRANS =  7,
	NET_SCTP_PATH_MAX_RETRANS        =  8,
	NET_SCTP_MAX_INIT_RETRANSMITS    =  9,
	NET_SCTP_HB_INTERVAL             = 10,
	NET_SCTP_PRESERVE_ENABLE         = 11,
	NET_SCTP_MAX_BURST               = 12,
	NET_SCTP_ADDIP_ENABLE		 = 13,
	NET_SCTP_PRSCTP_ENABLE		 = 14,
	NET_SCTP_SNDBUF_POLICY		 = 15,
};

/* /proc/sys/net/bridge */
enum {
	NET_BRIDGE_NF_CALL_ARPTABLES = 1,
	NET_BRIDGE_NF_CALL_IPTABLES = 2,
	NET_BRIDGE_NF_CALL_IP6TABLES = 3,
	NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
};

/* CTL_PROC names: */

/* CTL_FS names: */
enum
{
	FS_NRINODE=1,	/* int:current number of allocated inodes */
	FS_STATINODE=2,
	FS_MAXINODE=3,	/* int:maximum number of inodes that can be allocated */
	FS_NRDQUOT=4,	/* int:current number of allocated dquots */
	FS_MAXDQUOT=5,	/* int:maximum number of dquots that can be allocated */
	FS_NRFILE=6,	/* int:current number of allocated filedescriptors */
	FS_MAXFILE=7,	/* int:maximum number of filedescriptors that can be allocated */
	FS_DENTRY=8,
	FS_NRSUPER=9,	/* int:current number of allocated super_blocks */
	FS_MAXSUPER=10,	/* int:maximum number of super_blocks that can be allocated */
	FS_OVERFLOWUID=11,	/* int: overflow UID */
	FS_OVERFLOWGID=12,	/* int: overflow GID */
	FS_LEASES=13,	/* int: leases enabled */
	FS_DIR_NOTIFY=14,	/* int: directory notification enabled */
	FS_LEASE_TIME=15,	/* int: maximum time to wait for a lease break */
	FS_DQSTATS=16,	/* disc quota usage statistics and control */
	FS_XFS=17,	/* struct: control xfs parameters */
	FS_AIO_NR=18,	/* current system-wide number of aio requests */
	FS_AIO_MAX_NR=19,	/* system-wide maximum number of aio requests */
};

/* /proc/sys/fs/quota/ */
enum {
	FS_DQ_LOOKUPS = 1,
	FS_DQ_DROPS = 2,
	FS_DQ_READS = 3,
	FS_DQ_WRITES = 4,
	FS_DQ_CACHE_HITS = 5,
	FS_DQ_ALLOCATED = 6,
	FS_DQ_FREE = 7,
	FS_DQ_SYNCS = 8,
	FS_DQ_WARNINGS = 9,
};

/* CTL_DEBUG names: */

/* CTL_DEV names: */
enum {
	DEV_CDROM=1,
	DEV_HWMON=2,
	DEV_PARPORT=3,
	DEV_RAID=4,
	DEV_MAC_HID=5,
	DEV_SCSI=6,
};

/* /proc/sys/dev/cdrom */
enum {
	DEV_CDROM_INFO=1,
	DEV_CDROM_AUTOCLOSE=2,
	DEV_CDROM_AUTOEJECT=3,
	DEV_CDROM_DEBUG=4,
	DEV_CDROM_LOCK=5,
	DEV_CDROM_CHECK_MEDIA=6
};

/* /proc/sys/dev/parport */
enum {
	DEV_PARPORT_DEFAULT=-3
};

/* /proc/sys/dev/raid */
enum {
	DEV_RAID_SPEED_LIMIT_MIN=1,
	DEV_RAID_SPEED_LIMIT_MAX=2
};

/* /proc/sys/dev/parport/default */
enum {
	DEV_PARPORT_DEFAULT_TIMESLICE=1,
	DEV_PARPORT_DEFAULT_SPINTIME=2
};

/* /proc/sys/dev/parport/parport n */
enum {
	DEV_PARPORT_SPINTIME=1,
	DEV_PARPORT_BASE_ADDR=2,
	DEV_PARPORT_IRQ=3,
	DEV_PARPORT_DMA=4,
	DEV_PARPORT_MODES=5,
	DEV_PARPORT_DEVICES=6,
	DEV_PARPORT_AUTOPROBE=16
};

/* /proc/sys/dev/parport/parport n/devices/ */
enum {
	DEV_PARPORT_DEVICES_ACTIVE=-3,
};

/* /proc/sys/dev/parport/parport n/devices/device n */
enum {
	DEV_PARPORT_DEVICE_TIMESLICE=1,
};

/* /proc/sys/dev/mac_hid */
enum {
	DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
	DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
	DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
	DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
	DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
	DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
};

/* /proc/sys/dev/scsi */
enum {
	DEV_SCSI_LOGGING_LEVEL=1,
};

/* /proc/sys/abi */
enum
{
	ABI_DEFHANDLER_COFF=1,	/* default handler for coff binaries */
	ABI_DEFHANDLER_ELF=2, 	/* default handler for ELF binaries */
	ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
	ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
	ABI_TRACE=5,		/* tracing flags */
	ABI_FAKE_UTSNAME=6,	/* fake target utsname information */
};

#ifdef __KERNEL__

extern void sysctl_init(void);

typedef struct ctl_table ctl_table;

typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,
			 void __user *oldval, size_t __user *oldlenp,
			 void __user *newval, size_t newlen, 
			 void **context);

typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
			  void __user *buffer, size_t *lenp, loff_t *ppos);

extern int proc_dostring(ctl_table *, int, struct file *,
			 void __user *, size_t *, loff_t *);
extern int proc_dointvec(ctl_table *, int, struct file *,
			 void __user *, size_t *, loff_t *);
extern int proc_dointvec_bset(ctl_table *, int, struct file *,
			      void __user *, size_t *, loff_t *);
extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
				void __user *, size_t *, loff_t *);
extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
				 void __user *, size_t *, loff_t *);
extern int proc_dointvec_userhz_jiffies(ctl_table *, int, struct file *,
					void __user *, size_t *, loff_t *);
extern int proc_dointvec_ms_jiffies(ctl_table *, int, struct file *,
				    void __user *, size_t *, loff_t *);
extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
				  void __user *, size_t *, loff_t *);
extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
				      struct file *, void __user *, size_t *, loff_t *);

extern int do_sysctl (int __user *name, int nlen,
		      void __user *oldval, size_t __user *oldlenp,
		      void __user *newval, size_t newlen);

extern int do_sysctl_strategy (ctl_table *table, 
			       int __user *name, int nlen,
			       void __user *oldval, size_t __user *oldlenp,
			       void __user *newval, size_t newlen, void ** context);

extern ctl_handler sysctl_string;
extern ctl_handler sysctl_intvec;
extern ctl_handler sysctl_jiffies;
extern ctl_handler sysctl_ms_jiffies;


/*
 * Register a set of sysctl names by calling register_sysctl_table
 * with an initialised array of ctl_table's.  An entry with zero
 * ctl_name terminates the table.  table->de will be set up by the
 * registration and need not be initialised in advance.
 *
 * sysctl names can be mirrored automatically under /proc/sys.  The
 * procname supplied controls /proc naming.
 *
 * The table's mode will be honoured both for sys_sysctl(2) and
 * proc-fs access.
 *
 * Leaf nodes in the sysctl tree will be represented by a single file
 * under /proc; non-leaf nodes will be represented by directories.  A
 * null procname disables /proc mirroring at this node.
 * 
 * sysctl(2) can automatically manage read and write requests through
 * the sysctl table.  The data and maxlen fields of the ctl_table
 * struct enable minimal validation of the values being written to be
 * performed, and the mode field allows minimal authentication.
 * 
 * More sophisticated management can be enabled by the provision of a
 * strategy routine with the table entry.  This will be called before
 * any automatic read or write of the data is performed.
 * 
 * The strategy routine may return:
 * <0: Error occurred (error is passed to user process)
 * 0:  OK - proceed with automatic read or write.
 * >0: OK - read or write has been done by the strategy routine, so 
 *     return immediately.
 * 
 * There must be a proc_handler routine for any terminal nodes
 * mirrored under /proc/sys (non-terminals are handled by a built-in
 * directory handler).  Several default handlers are available to
 * cover common cases.
 */

/* A sysctl table is an array of struct ctl_table: */
struct ctl_table 
{
	int ctl_name;			/* Binary ID */
	const char *procname;		/* Text ID for /proc/sys, or zero */
	void *data;
	int maxlen;
	mode_t mode;
	ctl_table *child;
	proc_handler *proc_handler;	/* Callback for text formatting */
	ctl_handler *strategy;		/* Callback function for all r/w */
	struct proc_dir_entry *de;	/* /proc control block */
	void *extra1;
	void *extra2;
};

/* struct ctl_table_header is used to maintain dynamic lists of
   ctl_table trees. */
struct ctl_table_header
{
	ctl_table *ctl_table;
	struct list_head ctl_entry;
};

struct ctl_table_header * register_sysctl_table(ctl_table * table, 
						int insert_at_head);
void unregister_sysctl_table(struct ctl_table_header * table);

#else /* __KERNEL__ */

#endif /* __KERNEL__ */

#endif /* _LINUX_SYSCTL_H */
OpenPOWER on IntegriCloud