sysctl.c 67.9 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
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
/*
 * sysctl.c: General linux system control interface
 *
 * Begun 24 March 1995, Stephen Tweedie
 * Added /proc support, Dec 1995
 * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
 * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.
 * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver.
 * Dynamic registration fixes, Stephen Tweedie.
 * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
 * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris
 *  Horn.
 * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer.
 * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer.
 * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill
 *  Wendling.
 * The list_for_each() macro wasn't appropriate for the sysctl loop.
 *  Removed it and replaced it with older style, 03/23/00, Bill Wendling
 */

#include <linux/module.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
27
#include <linux/security.h>
Linus Torvalds's avatar
Linus Torvalds committed
28 29 30
#include <linux/ctype.h>
#include <linux/utsname.h>
#include <linux/smp_lock.h>
31
#include <linux/fs.h>
Linus Torvalds's avatar
Linus Torvalds committed
32 33
#include <linux/init.h>
#include <linux/kernel.h>
34
#include <linux/kobject.h>
35
#include <linux/net.h>
Linus Torvalds's avatar
Linus Torvalds committed
36 37 38 39 40
#include <linux/sysrq.h>
#include <linux/highuid.h>
#include <linux/writeback.h>
#include <linux/hugetlb.h>
#include <linux/initrd.h>
41
#include <linux/key.h>
Linus Torvalds's avatar
Linus Torvalds committed
42 43 44 45
#include <linux/times.h>
#include <linux/limits.h>
#include <linux/dcache.h>
#include <linux/syscalls.h>
Adrian Bunk's avatar
Adrian Bunk committed
46
#include <linux/vmstat.h>
47 48
#include <linux/nfs_fs.h>
#include <linux/acpi.h>
49
#include <linux/reboot.h>
50
#include <linux/ftrace.h>
Linus Torvalds's avatar
Linus Torvalds committed
51 52 53 54

#include <asm/uaccess.h>
#include <asm/processor.h>

55 56
#ifdef CONFIG_X86
#include <asm/nmi.h>
57
#include <asm/stacktrace.h>
58
#include <asm/io.h>
59 60
#endif

61 62
static int deprecated_sysctl_warning(struct __sysctl_args *args);

Linus Torvalds's avatar
Linus Torvalds committed
63 64 65 66
#if defined(CONFIG_SYSCTL)

/* External variables not in a header file. */
extern int C_A_D;
Ingo Molnar's avatar
Ingo Molnar committed
67
extern int print_fatal_signals;
Linus Torvalds's avatar
Linus Torvalds committed
68 69
extern int sysctl_overcommit_memory;
extern int sysctl_overcommit_ratio;
70
extern int sysctl_panic_on_oom;
71
extern int sysctl_oom_kill_allocating_task;
72
extern int sysctl_oom_dump_tasks;
Linus Torvalds's avatar
Linus Torvalds committed
73 74
extern int max_threads;
extern int core_uses_pid;
Alan Cox's avatar
Alan Cox committed
75
extern int suid_dumpable;
Linus Torvalds's avatar
Linus Torvalds committed
76 77 78 79
extern char core_pattern[];
extern int pid_max;
extern int min_free_kbytes;
extern int pid_max_min, pid_max_max;
Andrew Morton's avatar
Andrew Morton committed
80
extern int sysctl_drop_caches;
81
extern int percpu_pagelist_fraction;
82
extern int compat_log;
Kees Cook's avatar
Kees Cook committed
83
extern int maps_protect;
Arjan van de Ven's avatar
Arjan van de Ven committed
84
extern int latencytop_enabled;
85
extern int sysctl_nr_open_min, sysctl_nr_open_max;
86 87 88
#ifdef CONFIG_RCU_TORTURE_TEST
extern int rcutorture_runnable;
#endif /* #ifdef CONFIG_RCU_TORTURE_TEST */
Linus Torvalds's avatar
Linus Torvalds committed
89

90
/* Constants used for minimum and  maximum */
91
#if defined(CONFIG_HIGHMEM) || defined(CONFIG_DETECT_SOFTLOCKUP)
92
static int one = 1;
93 94 95
#endif

#ifdef CONFIG_DETECT_SOFTLOCKUP
96
static int sixty = 60;
97
static int neg_one = -1;
98 99 100 101 102 103 104 105 106
#endif

#ifdef CONFIG_MMU
static int two = 2;
#endif

static int zero;
static int one_hundred = 100;

Linus Torvalds's avatar
Linus Torvalds committed
107 108 109
/* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
static int maxolduid = 65535;
static int minolduid;
110
static int min_percpu_pagelist_fract = 8;
Linus Torvalds's avatar
Linus Torvalds committed
111 112 113

static int ngroups_max = NGROUPS_MAX;

114
#ifdef CONFIG_MODULES
Linus Torvalds's avatar
Linus Torvalds committed
115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
extern char modprobe_path[];
#endif
#ifdef CONFIG_CHR_DEV_SG
extern int sg_big_buff;
#endif

#ifdef __sparc__
extern char reboot_command [];
extern int stop_a_enabled;
extern int scons_pwroff;
#endif

#ifdef __hppa__
extern int pwrsw_enabled;
extern int unaligned_enabled;
#endif

132
#ifdef CONFIG_S390
Linus Torvalds's avatar
Linus Torvalds committed
133 134 135 136
#ifdef CONFIG_MATHEMU
extern int sysctl_ieee_emulation_warnings;
#endif
extern int sysctl_userprocess_debug;
137
extern int spin_retry;
Linus Torvalds's avatar
Linus Torvalds committed
138 139 140 141 142 143
#endif

#ifdef CONFIG_BSD_PROCESS_ACCT
extern int acct_parm[];
#endif

144 145 146 147
#ifdef CONFIG_IA64
extern int no_unaligned_warning;
#endif

Ingo Molnar's avatar
Ingo Molnar committed
148 149 150 151
#ifdef CONFIG_RT_MUTEXES
extern int max_lock_depth;
#endif

152
#ifdef CONFIG_PROC_SYSCTL
153
static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp,
154
		  void __user *buffer, size_t *lenp, loff_t *ppos);
155
static int proc_dointvec_taint(struct ctl_table *table, int write, struct file *filp,
156
			       void __user *buffer, size_t *lenp, loff_t *ppos);
157
#endif
158

159
static struct ctl_table root_table[];
160 161 162 163 164 165 166 167 168 169
static struct ctl_table_root sysctl_table_root;
static struct ctl_table_header root_table_header = {
	.ctl_table = root_table,
	.ctl_entry = LIST_HEAD_INIT(sysctl_table_root.header_list),
	.root = &sysctl_table_root,
};
static struct ctl_table_root sysctl_table_root = {
	.root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
	.header_list = LIST_HEAD_INIT(root_table_header.ctl_entry),
};
Linus Torvalds's avatar
Linus Torvalds committed
170

171 172 173 174 175 176
static struct ctl_table kern_table[];
static struct ctl_table vm_table[];
static struct ctl_table fs_table[];
static struct ctl_table debug_table[];
static struct ctl_table dev_table[];
extern struct ctl_table random_table[];
177
#ifdef CONFIG_INOTIFY_USER
178
extern struct ctl_table inotify_table[];
Robert Love's avatar
Robert Love committed
179
#endif
Linus Torvalds's avatar
Linus Torvalds committed
180 181 182 183 184

#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
int sysctl_legacy_va_layout;
#endif

Peter Zijlstra's avatar
Peter Zijlstra committed
185 186
extern int prove_locking;
extern int lock_stat;
187

Linus Torvalds's avatar
Linus Torvalds committed
188 189
/* The default sysctl tables: */

190
static struct ctl_table root_table[] = {
Linus Torvalds's avatar
Linus Torvalds committed
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
	{
		.ctl_name	= CTL_KERN,
		.procname	= "kernel",
		.mode		= 0555,
		.child		= kern_table,
	},
	{
		.ctl_name	= CTL_VM,
		.procname	= "vm",
		.mode		= 0555,
		.child		= vm_table,
	},
	{
		.ctl_name	= CTL_FS,
		.procname	= "fs",
		.mode		= 0555,
		.child		= fs_table,
	},
	{
		.ctl_name	= CTL_DEBUG,
		.procname	= "debug",
		.mode		= 0555,
		.child		= debug_table,
	},
	{
		.ctl_name	= CTL_DEV,
		.procname	= "dev",
		.mode		= 0555,
		.child		= dev_table,
	},
221 222 223 224
/*
 * NOTE: do not add new entries to this table unless you have read
 * Documentation/sysctl/ctl_unnumbered.txt
 */
Linus Torvalds's avatar
Linus Torvalds committed
225 226 227
	{ .ctl_name = 0 }
};

Ingo Molnar's avatar
Ingo Molnar committed
228
#ifdef CONFIG_SCHED_DEBUG
229 230 231 232
static int min_sched_granularity_ns = 100000;		/* 100 usecs */
static int max_sched_granularity_ns = NSEC_PER_SEC;	/* 1 second */
static int min_wakeup_granularity_ns;			/* 0 usecs */
static int max_wakeup_granularity_ns = NSEC_PER_SEC;	/* 1 second */
Ingo Molnar's avatar
Ingo Molnar committed
233 234
#endif

235
static struct ctl_table kern_table[] = {
Ingo Molnar's avatar
Ingo Molnar committed
236 237 238
#ifdef CONFIG_SCHED_DEBUG
	{
		.ctl_name	= CTL_UNNUMBERED,
239 240
		.procname	= "sched_min_granularity_ns",
		.data		= &sysctl_sched_min_granularity,
Ingo Molnar's avatar
Ingo Molnar committed
241 242
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
243 244 245 246
		.proc_handler	= &sched_nr_latency_handler,
		.strategy	= &sysctl_intvec,
		.extra1		= &min_sched_granularity_ns,
		.extra2		= &max_sched_granularity_ns,
Ingo Molnar's avatar
Ingo Molnar committed
247
	},
248 249 250 251 252 253
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_latency_ns",
		.data		= &sysctl_sched_latency,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
254
		.proc_handler	= &sched_nr_latency_handler,
255 256 257 258
		.strategy	= &sysctl_intvec,
		.extra1		= &min_sched_granularity_ns,
		.extra2		= &max_sched_granularity_ns,
	},
Ingo Molnar's avatar
Ingo Molnar committed
259 260 261 262 263 264 265 266 267 268 269
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_wakeup_granularity_ns",
		.data		= &sysctl_sched_wakeup_granularity,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &min_wakeup_granularity_ns,
		.extra2		= &max_wakeup_granularity_ns,
	},
270 271 272 273 274 275 276 277
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_shares_ratelimit",
		.data		= &sysctl_sched_shares_ratelimit,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
Ingo Molnar's avatar
Ingo Molnar committed
278 279 280 281 282 283 284 285
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_child_runs_first",
		.data		= &sysctl_sched_child_runs_first,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
286 287 288 289 290 291 292 293
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_features",
		.data		= &sysctl_sched_features,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
294 295 296 297 298 299 300 301
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_migration_cost",
		.data		= &sysctl_sched_migration_cost,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
302 303 304 305 306
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_nr_migrate",
		.data		= &sysctl_sched_nr_migrate,
		.maxlen		= sizeof(unsigned int),
Peter Zijlstra's avatar
Peter Zijlstra committed
307 308 309
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
310
#endif
Peter Zijlstra's avatar
Peter Zijlstra committed
311 312 313 314 315 316
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_rt_period_us",
		.data		= &sysctl_sched_rt_period,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
317
		.proc_handler	= &sched_rt_handler,
Peter Zijlstra's avatar
Peter Zijlstra committed
318 319 320 321 322 323 324
	},
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_rt_runtime_us",
		.data		= &sysctl_sched_rt_runtime,
		.maxlen		= sizeof(int),
		.mode		= 0644,
325
		.proc_handler	= &sched_rt_handler,
Peter Zijlstra's avatar
Peter Zijlstra committed
326
	},
327 328 329 330 331 332 333 334
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "sched_compat_yield",
		.data		= &sysctl_sched_compat_yield,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
Peter Zijlstra's avatar
Peter Zijlstra committed
335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353
#ifdef CONFIG_PROVE_LOCKING
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "prove_locking",
		.data		= &prove_locking,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
#ifdef CONFIG_LOCK_STAT
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "lock_stat",
		.data		= &lock_stat,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
Ingo Molnar's avatar
Ingo Molnar committed
354
#endif
Linus Torvalds's avatar
Linus Torvalds committed
355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374
	{
		.ctl_name	= KERN_PANIC,
		.procname	= "panic",
		.data		= &panic_timeout,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= KERN_CORE_USES_PID,
		.procname	= "core_uses_pid",
		.data		= &core_uses_pid,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= KERN_CORE_PATTERN,
		.procname	= "core_pattern",
		.data		= core_pattern,
375
		.maxlen		= CORENAME_MAX_SIZE,
Linus Torvalds's avatar
Linus Torvalds committed
376 377 378 379
		.mode		= 0644,
		.proc_handler	= &proc_dostring,
		.strategy	= &sysctl_string,
	},
380
#ifdef CONFIG_PROC_SYSCTL
Linus Torvalds's avatar
Linus Torvalds committed
381 382 383 384
	{
		.procname	= "tainted",
		.data		= &tainted,
		.maxlen		= sizeof(int),
385 386
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_taint,
Linus Torvalds's avatar
Linus Torvalds committed
387
	},
388
#endif
Arjan van de Ven's avatar
Arjan van de Ven committed
389 390 391 392 393 394 395 396 397
#ifdef CONFIG_LATENCYTOP
	{
		.procname	= "latencytop",
		.data		= &latencytop_enabled,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
Linus Torvalds's avatar
Linus Torvalds committed
398 399 400 401 402 403 404 405 406 407
#ifdef CONFIG_BLK_DEV_INITRD
	{
		.ctl_name	= KERN_REALROOTDEV,
		.procname	= "real-root-dev",
		.data		= &real_root_dev,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
Ingo Molnar's avatar
Ingo Molnar committed
408 409 410 411 412 413 414 415
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "print-fatal-signals",
		.data		= &print_fatal_signals,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
Linus Torvalds's avatar
Linus Torvalds committed
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
#ifdef __sparc__
	{
		.ctl_name	= KERN_SPARC_REBOOT,
		.procname	= "reboot-cmd",
		.data		= reboot_command,
		.maxlen		= 256,
		.mode		= 0644,
		.proc_handler	= &proc_dostring,
		.strategy	= &sysctl_string,
	},
	{
		.ctl_name	= KERN_SPARC_STOP_A,
		.procname	= "stop-a",
		.data		= &stop_a_enabled,
		.maxlen		= sizeof (int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= KERN_SPARC_SCONS_PWROFF,
		.procname	= "scons-poweroff",
		.data		= &scons_pwroff,
		.maxlen		= sizeof (int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
#ifdef __hppa__
	{
		.ctl_name	= KERN_HPPA_PWRSW,
		.procname	= "soft-power",
		.data		= &pwrsw_enabled,
		.maxlen		= sizeof (int),
	 	.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= KERN_HPPA_UNALIGNED,
		.procname	= "unaligned-trap",
		.data		= &unaligned_enabled,
		.maxlen		= sizeof (int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
	{
		.ctl_name	= KERN_CTLALTDEL,
		.procname	= "ctrl-alt-del",
		.data		= &C_A_D,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
469 470 471 472 473 474 475 476 477 478
#ifdef CONFIG_FTRACE
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "ftrace_enabled",
		.data		= &ftrace_enabled,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &ftrace_enable_sysctl,
	},
#endif
479
#ifdef CONFIG_MODULES
Linus Torvalds's avatar
Linus Torvalds committed
480 481 482 483 484 485 486 487 488 489
	{
		.ctl_name	= KERN_MODPROBE,
		.procname	= "modprobe",
		.data		= &modprobe_path,
		.maxlen		= KMOD_PATH_LEN,
		.mode		= 0644,
		.proc_handler	= &proc_dostring,
		.strategy	= &sysctl_string,
	},
#endif
Andrew Morton's avatar
Andrew Morton committed
490
#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
Linus Torvalds's avatar
Linus Torvalds committed
491 492 493
	{
		.ctl_name	= KERN_HOTPLUG,
		.procname	= "hotplug",
494 495
		.data		= &uevent_helper,
		.maxlen		= UEVENT_HELPER_PATH_LEN,
Linus Torvalds's avatar
Linus Torvalds committed
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
		.mode		= 0644,
		.proc_handler	= &proc_dostring,
		.strategy	= &sysctl_string,
	},
#endif
#ifdef CONFIG_CHR_DEV_SG
	{
		.ctl_name	= KERN_SG_BIG_BUFF,
		.procname	= "sg-big-buff",
		.data		= &sg_big_buff,
		.maxlen		= sizeof (int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
#endif
#ifdef CONFIG_BSD_PROCESS_ACCT
	{
		.ctl_name	= KERN_ACCT,
		.procname	= "acct",
		.data		= &acct_parm,
		.maxlen		= 3*sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
#ifdef CONFIG_MAGIC_SYSRQ
	{
		.ctl_name	= KERN_SYSRQ,
		.procname	= "sysrq",
525
		.data		= &__sysrq_enabled,
Linus Torvalds's avatar
Linus Torvalds committed
526 527 528 529 530
		.maxlen		= sizeof (int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
531
#ifdef CONFIG_PROC_SYSCTL
Linus Torvalds's avatar
Linus Torvalds committed
532 533
	{
		.procname	= "cad_pid",
534
		.data		= NULL,
Linus Torvalds's avatar
Linus Torvalds committed
535 536
		.maxlen		= sizeof (int),
		.mode		= 0600,
537
		.proc_handler	= &proc_do_cad_pid,
Linus Torvalds's avatar
Linus Torvalds committed
538
	},
539
#endif
Linus Torvalds's avatar
Linus Torvalds committed
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
	{
		.ctl_name	= KERN_MAX_THREADS,
		.procname	= "threads-max",
		.data		= &max_threads,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= KERN_RANDOM,
		.procname	= "random",
		.mode		= 0555,
		.child		= random_table,
	},
	{
		.ctl_name	= KERN_OVERFLOWUID,
		.procname	= "overflowuid",
		.data		= &overflowuid,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &minolduid,
		.extra2		= &maxolduid,
	},
	{
		.ctl_name	= KERN_OVERFLOWGID,
		.procname	= "overflowgid",
		.data		= &overflowgid,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &minolduid,
		.extra2		= &maxolduid,
	},
576
#ifdef CONFIG_S390
Linus Torvalds's avatar
Linus Torvalds committed
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
#ifdef CONFIG_MATHEMU
	{
		.ctl_name	= KERN_IEEE_EMULATION_WARNINGS,
		.procname	= "ieee_emulation_warnings",
		.data		= &sysctl_ieee_emulation_warnings,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
	{
		.ctl_name	= KERN_S390_USER_DEBUG_LOGGING,
		.procname	= "userprocess_debug",
		.data		= &sysctl_userprocess_debug,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
	{
		.ctl_name	= KERN_PIDMAX,
		.procname	= "pid_max",
		.data		= &pid_max,
		.maxlen		= sizeof (int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= sysctl_intvec,
		.extra1		= &pid_max_min,
		.extra2		= &pid_max_max,
	},
	{
		.ctl_name	= KERN_PANIC_ON_OOPS,
		.procname	= "panic_on_oops",
		.data		= &panic_on_oops,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
615 616 617 618 619 620 621 622 623
#if defined CONFIG_PRINTK
	{
		.ctl_name	= KERN_PRINTK,
		.procname	= "printk",
		.data		= &console_loglevel,
		.maxlen		= 4*sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
Linus Torvalds's avatar
Linus Torvalds committed
624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640
	{
		.ctl_name	= KERN_PRINTK_RATELIMIT,
		.procname	= "printk_ratelimit",
		.data		= &printk_ratelimit_jiffies,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies,
	},
	{
		.ctl_name	= KERN_PRINTK_RATELIMIT_BURST,
		.procname	= "printk_ratelimit_burst",
		.data		= &printk_ratelimit_burst,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
641
#endif
Linus Torvalds's avatar
Linus Torvalds committed
642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
	{
		.ctl_name	= KERN_NGROUPS_MAX,
		.procname	= "ngroups_max",
		.data		= &ngroups_max,
		.maxlen		= sizeof (int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
	{
		.ctl_name       = KERN_UNKNOWN_NMI_PANIC,
		.procname       = "unknown_nmi_panic",
		.data           = &unknown_nmi_panic,
		.maxlen         = sizeof (int),
		.mode           = 0644,
657
		.proc_handler   = &proc_dointvec,
Linus Torvalds's avatar
Linus Torvalds committed
658
	},
659 660 661 662 663 664
	{
		.procname       = "nmi_watchdog",
		.data           = &nmi_watchdog_enabled,
		.maxlen         = sizeof (int),
		.mode           = 0644,
		.proc_handler   = &proc_nmi_enabled,
Linus Torvalds's avatar
Linus Torvalds committed
665 666 667
	},
#endif
#if defined(CONFIG_X86)
668 669 670 671 672 673 674 675
	{
		.ctl_name	= KERN_PANIC_ON_NMI,
		.procname	= "panic_on_unrecovered_nmi",
		.data		= &panic_on_unrecovered_nmi,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
Linus Torvalds's avatar
Linus Torvalds committed
676 677 678 679 680 681 682 683
	{
		.ctl_name	= KERN_BOOTLOADER_TYPE,
		.procname	= "bootloader_type",
		.data		= &bootloader_type,
		.maxlen		= sizeof (int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
684 685 686 687 688 689 690 691
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "kstack_depth_to_print",
		.data		= &kstack_depth_to_print,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
692 693 694 695 696 697 698 699
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "io_delay_type",
		.data		= &io_delay_type,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
Linus Torvalds's avatar
Linus Torvalds committed
700
#endif
701
#if defined(CONFIG_MMU)
Linus Torvalds's avatar
Linus Torvalds committed
702 703 704 705 706 707 708 709
	{
		.ctl_name	= KERN_RANDOMIZE,
		.procname	= "randomize_va_space",
		.data		= &randomize_va_space,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
710
#endif
711
#if defined(CONFIG_S390) && defined(CONFIG_SMP)
712 713 714 715 716 717 718 719
	{
		.ctl_name	= KERN_SPIN_RETRY,
		.procname	= "spin_retry",
		.data		= &spin_retry,
		.maxlen		= sizeof (int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
720
#endif
Len Brown's avatar
Len Brown committed
721
#if	defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
722 723
	{
		.procname	= "acpi_video_flags",
724
		.data		= &acpi_realmode_flags,
725 726
		.maxlen		= sizeof (unsigned long),
		.mode		= 0644,
727
		.proc_handler	= &proc_doulongvec_minmax,
728
	},
729 730 731 732 733 734 735 736 737 738
#endif
#ifdef CONFIG_IA64
	{
		.ctl_name	= KERN_IA64_UNALIGNED,
		.procname	= "ignore-unaligned-usertrap",
		.data		= &no_unaligned_warning,
		.maxlen		= sizeof (int),
	 	.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
739
#endif
740
#ifdef CONFIG_DETECT_SOFTLOCKUP
741 742 743 744 745 746
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "softlockup_panic",
		.data		= &softlockup_panic,
		.maxlen		= sizeof(int),
		.mode		= 0644,
747
		.proc_handler	= &proc_dointvec_minmax,
748 749 750 751
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
		.extra2		= &one,
	},
752 753 754 755
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "softlockup_thresh",
		.data		= &softlockup_thresh,
756
		.maxlen		= sizeof(int),
757
		.mode		= 0644,
758
		.proc_handler	= &proc_dointvec_minmax,
759
		.strategy	= &sysctl_intvec,
760
		.extra1		= &neg_one,
761 762
		.extra2		= &sixty,
	},
763 764 765 766
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "hung_task_check_count",
		.data		= &sysctl_hung_task_check_count,
Ingo Molnar's avatar
Ingo Molnar committed
767
		.maxlen		= sizeof(unsigned long),
768
		.mode		= 0644,
Ingo Molnar's avatar
Ingo Molnar committed
769
		.proc_handler	= &proc_doulongvec_minmax,
770 771 772 773 774 775
		.strategy	= &sysctl_intvec,
	},
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "hung_task_timeout_secs",
		.data		= &sysctl_hung_task_timeout_secs,
Ingo Molnar's avatar
Ingo Molnar committed
776
		.maxlen		= sizeof(unsigned long),
777
		.mode		= 0644,
Ingo Molnar's avatar
Ingo Molnar committed
778
		.proc_handler	= &proc_doulongvec_minmax,
779 780 781 782 783 784
		.strategy	= &sysctl_intvec,
	},
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "hung_task_warnings",
		.data		= &sysctl_hung_task_warnings,
Ingo Molnar's avatar
Ingo Molnar committed
785
		.maxlen		= sizeof(unsigned long),
786
		.mode		= 0644,
Ingo Molnar's avatar
Ingo Molnar committed
787
		.proc_handler	= &proc_doulongvec_minmax,
788 789
		.strategy	= &sysctl_intvec,
	},
790
#endif
791 792 793 794 795 796 797 798 799
#ifdef CONFIG_COMPAT
	{
		.ctl_name	= KERN_COMPAT_LOG,
		.procname	= "compat-log",
		.data		= &compat_log,
		.maxlen		= sizeof (int),
	 	.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
800
#endif
Ingo Molnar's avatar
Ingo Molnar committed
801 802 803 804 805 806 807 808 809 810
#ifdef CONFIG_RT_MUTEXES
	{
		.ctl_name	= KERN_MAX_LOCK_DEPTH,
		.procname	= "max_lock_depth",
		.data		= &max_lock_depth,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
Kees Cook's avatar
Kees Cook committed
811 812 813 814 815 816 817 818 819 820
#ifdef CONFIG_PROC_FS
	{
		.ctl_name       = CTL_UNNUMBERED,
		.procname       = "maps_protect",
		.data           = &maps_protect,
		.maxlen         = sizeof(int),
		.mode           = 0644,
		.proc_handler   = &proc_dointvec,
	},
#endif
821 822 823 824 825 826 827 828 829
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "poweroff_cmd",
		.data		= &poweroff_cmd,
		.maxlen		= POWEROFF_CMD_PATH_LEN,
		.mode		= 0644,
		.proc_handler	= &proc_dostring,
		.strategy	= &sysctl_string,
	},
830 831 832 833 834 835 836 837
#ifdef CONFIG_KEYS
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "keys",
		.mode		= 0555,
		.child		= key_sysctls,
	},
#endif
838 839 840 841 842 843 844 845 846 847
#ifdef CONFIG_RCU_TORTURE_TEST
	{
		.ctl_name       = CTL_UNNUMBERED,
		.procname       = "rcutorture_runnable",
		.data           = &rcutorture_runnable,
		.maxlen         = sizeof(int),
		.mode           = 0644,
		.proc_handler   = &proc_dointvec,
	},
#endif
848 849 850 851
/*
 * NOTE: do not add new entries to this table unless you have read
 * Documentation/sysctl/ctl_unnumbered.txt
 */
Linus Torvalds's avatar
Linus Torvalds committed
852 853 854
	{ .ctl_name = 0 }
};

855
static struct ctl_table vm_table[] = {
Linus Torvalds's avatar
Linus Torvalds committed
856 857 858 859 860 861 862 863
	{
		.ctl_name	= VM_OVERCOMMIT_MEMORY,
		.procname	= "overcommit_memory",
		.data		= &sysctl_overcommit_memory,
		.maxlen		= sizeof(sysctl_overcommit_memory),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
864 865 866 867 868 869 870 871
	{
		.ctl_name	= VM_PANIC_ON_OOM,
		.procname	= "panic_on_oom",
		.data		= &sysctl_panic_on_oom,
		.maxlen		= sizeof(sysctl_panic_on_oom),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
872 873 874 875 876 877 878 879
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "oom_kill_allocating_task",
		.data		= &sysctl_oom_kill_allocating_task,
		.maxlen		= sizeof(sysctl_oom_kill_allocating_task),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
880 881 882 883 884 885 886 887
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "oom_dump_tasks",
		.data		= &sysctl_oom_dump_tasks,
		.maxlen		= sizeof(sysctl_oom_dump_tasks),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
Linus Torvalds's avatar
Linus Torvalds committed
888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920
	{
		.ctl_name	= VM_OVERCOMMIT_RATIO,
		.procname	= "overcommit_ratio",
		.data		= &sysctl_overcommit_ratio,
		.maxlen		= sizeof(sysctl_overcommit_ratio),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= VM_PAGE_CLUSTER,
		.procname	= "page-cluster", 
		.data		= &page_cluster,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= VM_DIRTY_BACKGROUND,
		.procname	= "dirty_background_ratio",
		.data		= &dirty_background_ratio,
		.maxlen		= sizeof(dirty_background_ratio),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
		.extra2		= &one_hundred,
	},
	{
		.ctl_name	= VM_DIRTY_RATIO,
		.procname	= "dirty_ratio",
		.data		= &vm_dirty_ratio,
		.maxlen		= sizeof(vm_dirty_ratio),
		.mode		= 0644,
921
		.proc_handler	= &dirty_ratio_handler,
Linus Torvalds's avatar
Linus Torvalds committed
922 923 924 925 926 927
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
		.extra2		= &one_hundred,
	},
	{
		.procname	= "dirty_writeback_centisecs",
928 929
		.data		= &dirty_writeback_interval,
		.maxlen		= sizeof(dirty_writeback_interval),
Linus Torvalds's avatar
Linus Torvalds committed
930 931 932 933 934
		.mode		= 0644,
		.proc_handler	= &dirty_writeback_centisecs_handler,
	},
	{
		.procname	= "dirty_expire_centisecs",
935 936
		.data		= &dirty_expire_interval,
		.maxlen		= sizeof(dirty_expire_interval),
Linus Torvalds's avatar
Linus Torvalds committed
937
		.mode		= 0644,
938
		.proc_handler	= &proc_dointvec_userhz_jiffies,
Linus Torvalds's avatar
Linus Torvalds committed
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976
	},
	{
		.ctl_name	= VM_NR_PDFLUSH_THREADS,
		.procname	= "nr_pdflush_threads",
		.data		= &nr_pdflush_threads,
		.maxlen		= sizeof nr_pdflush_threads,
		.mode		= 0444 /* read-only*/,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= VM_SWAPPINESS,
		.procname	= "swappiness",
		.data		= &vm_swappiness,
		.maxlen		= sizeof(vm_swappiness),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
		.extra2		= &one_hundred,
	},
#ifdef CONFIG_HUGETLB_PAGE
	 {
		.procname	= "nr_hugepages",
		.data		= &max_huge_pages,
		.maxlen		= sizeof(unsigned long),
		.mode		= 0644,
		.proc_handler	= &hugetlb_sysctl_handler,
		.extra1		= (void *)&hugetlb_zero,
		.extra2		= (void *)&hugetlb_infinity,
	 },
	 {
		.ctl_name	= VM_HUGETLB_GROUP,
		.procname	= "hugetlb_shm_group",
		.data		= &sysctl_hugetlb_shm_group,
		.maxlen		= sizeof(gid_t),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	 },
977 978 979 980 981 982 983 984
	 {
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "hugepages_treat_as_movable",
		.data		= &hugepages_treat_as_movable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &hugetlb_treat_movable_handler,
	},
985 986 987
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "nr_overcommit_hugepages",
988 989
		.data		= &sysctl_overcommit_huge_pages,
		.maxlen		= sizeof(sysctl_overcommit_huge_pages),
990
		.mode		= 0644,
991
		.proc_handler	= &hugetlb_overcommit_handler,
992
	},
Linus Torvalds's avatar
Linus Torvalds committed
993 994 995 996 997 998 999 1000 1001 1002
#endif
	{
		.ctl_name	= VM_LOWMEM_RESERVE_RATIO,
		.procname	= "lowmem_reserve_ratio",
		.data		= &sysctl_lowmem_reserve_ratio,
		.maxlen		= sizeof(sysctl_lowmem_reserve_ratio),
		.mode		= 0644,
		.proc_handler	= &lowmem_reserve_ratio_sysctl_handler,
		.strategy	= &sysctl_intvec,
	},
Andrew Morton's avatar
Andrew Morton committed
1003 1004 1005 1006 1007 1008 1009 1010 1011
	{
		.ctl_name	= VM_DROP_PAGECACHE,
		.procname	= "drop_caches",
		.data		= &sysctl_drop_caches,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= drop_caches_sysctl_handler,
		.strategy	= &sysctl_intvec,
	},
Linus Torvalds's avatar
Linus Torvalds committed
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
	{
		.ctl_name	= VM_MIN_FREE_KBYTES,
		.procname	= "min_free_kbytes",
		.data		= &min_free_kbytes,
		.maxlen		= sizeof(min_free_kbytes),
		.mode		= 0644,
		.proc_handler	= &min_free_kbytes_sysctl_handler,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
	},
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031
	{
		.ctl_name	= VM_PERCPU_PAGELIST_FRACTION,
		.procname	= "percpu_pagelist_fraction",
		.data		= &percpu_pagelist_fraction,
		.maxlen		= sizeof(percpu_pagelist_fraction),
		.mode		= 0644,
		.proc_handler	= &percpu_pagelist_fraction_sysctl_handler,
		.strategy	= &sysctl_intvec,
		.extra1		= &min_percpu_pagelist_fract,
	},
Linus Torvalds's avatar
Linus Torvalds committed
1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047
#ifdef CONFIG_MMU
	{
		.ctl_name	= VM_MAX_MAP_COUNT,
		.procname	= "max_map_count",
		.data		= &sysctl_max_map_count,
		.maxlen		= sizeof(sysctl_max_map_count),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec
	},
#endif
	{
		.ctl_name	= VM_LAPTOP_MODE,
		.procname	= "laptop_mode",
		.data		= &laptop_mode,
		.maxlen		= sizeof(laptop_mode),
		.mode		= 0644,
1048 1049
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies,
Linus Torvalds's avatar
Linus Torvalds committed
1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
	},
	{
		.ctl_name	= VM_BLOCK_DUMP,
		.procname	= "block_dump",
		.data		= &block_dump,
		.maxlen		= sizeof(block_dump),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
	},
	{
		.ctl_name	= VM_VFS_CACHE_PRESSURE,
		.procname	= "vfs_cache_pressure",
		.data		= &sysctl_vfs_cache_pressure,
		.maxlen		= sizeof(sysctl_vfs_cache_pressure),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
	},
#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
	{
		.ctl_name	= VM_LEGACY_VA_LAYOUT,
		.procname	= "legacy_va_layout",
		.data		= &sysctl_legacy_va_layout,
		.maxlen		= sizeof(sysctl_legacy_va_layout),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
	},
#endif
1083 1084 1085 1086 1087 1088 1089 1090
#ifdef CONFIG_NUMA
	{
		.ctl_name	= VM_ZONE_RECLAIM_MODE,
		.procname	= "zone_reclaim_mode",
		.data		= &zone_reclaim_mode,
		.maxlen		= sizeof(zone_reclaim_mode),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
1091 1092
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
1093
	},
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104
	{
		.ctl_name	= VM_MIN_UNMAPPED,
		.procname	= "min_unmapped_ratio",
		.data		= &sysctl_min_unmapped_ratio,
		.maxlen		= sizeof(sysctl_min_unmapped_ratio),
		.mode		= 0644,
		.proc_handler	= &sysctl_min_unmapped_ratio_sysctl_handler,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
		.extra2		= &one_hundred,
	},
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
	{
		.ctl_name	= VM_MIN_SLAB,
		.procname	= "min_slab_ratio",
		.data		= &sysctl_min_slab_ratio,
		.maxlen		= sizeof(sysctl_min_slab_ratio),
		.mode		= 0644,
		.proc_handler	= &sysctl_min_slab_ratio_sysctl_handler,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
		.extra2		= &one_hundred,
	},
1116
#endif
1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
#ifdef CONFIG_SMP
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "stat_interval",
		.data		= &sysctl_stat_interval,
		.maxlen		= sizeof(sysctl_stat_interval),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_jiffies,
		.strategy	= &sysctl_jiffies,
	},
#endif
1128 1129 1130 1131 1132 1133 1134 1135 1136
#ifdef CONFIG_SECURITY
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "mmap_min_addr",
		.data		= &mmap_min_addr,
		.maxlen         = sizeof(unsigned long),
		.mode		= 0644,
		.proc_handler	= &proc_doulongvec_minmax,
	},
1137
#endif
1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
#ifdef CONFIG_NUMA
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "numa_zonelist_order",
		.data		= &numa_zonelist_order,
		.maxlen		= NUMA_ZONELIST_ORDER_LEN,
		.mode		= 0644,
		.proc_handler	= &numa_zonelist_order_handler,
		.strategy	= &sysctl_string,
	},
#endif
1149
#if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1150
   (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
	{
		.ctl_name	= VM_VDSO_ENABLED,
		.procname	= "vdso_enabled",
		.data		= &vdso_enabled,
		.maxlen		= sizeof(vdso_enabled),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
	},
Linus Torvalds's avatar
Linus Torvalds committed
1161
#endif
1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174
#ifdef CONFIG_HIGHMEM
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "highmem_is_dirtyable",
		.data		= &vm_highmem_is_dirtyable,
		.maxlen		= sizeof(vm_highmem_is_dirtyable),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
		.extra2		= &one,
	},
#endif
1175 1176 1177 1178
/*
 * NOTE: do not add new entries to this table unless you have read
 * Documentation/sysctl/ctl_unnumbered.txt
 */
Linus Torvalds's avatar
Linus Torvalds committed
1179 1180 1181
	{ .ctl_name = 0 }
};

1182
#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1183
static struct ctl_table binfmt_misc_table[] = {
1184 1185 1186 1187
	{ .ctl_name = 0 }
};
#endif

1188
static struct ctl_table fs_table[] = {
Linus Torvalds's avatar
Linus Torvalds committed
1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209
	{
		.ctl_name	= FS_NRINODE,
		.procname	= "inode-nr",
		.data		= &inodes_stat,
		.maxlen		= 2*sizeof(int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= FS_STATINODE,
		.procname	= "inode-state",
		.data		= &inodes_stat,
		.maxlen		= 7*sizeof(int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
	{
		.procname	= "file-nr",
		.data		= &files_stat,
		.maxlen		= 3*sizeof(int),
		.mode		= 0444,
Dipankar Sarma's avatar
Dipankar Sarma committed
1210
		.proc_handler	= &proc_nr_files,
Linus Torvalds's avatar
Linus Torvalds committed
1211 1212 1213 1214 1215 1216 1217 1218 1219
	},
	{
		.ctl_name	= FS_MAXFILE,
		.procname	= "file-max",
		.data		= &files_stat.max_files,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
1220 1221 1222 1223 1224 1225
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "nr_open",
		.data		= &sysctl_nr_open,
		.maxlen		= sizeof(int),
		.mode		= 0644,
1226 1227 1228
		.proc_handler	= &proc_dointvec_minmax,
		.extra1		= &sysctl_nr_open_min,
		.extra2		= &sysctl_nr_open_max,
1229
	},
Linus Torvalds's avatar
Linus Torvalds committed
1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284
	{
		.ctl_name	= FS_DENTRY,
		.procname	= "dentry-state",
		.data		= &dentry_stat,
		.maxlen		= 6*sizeof(int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= FS_OVERFLOWUID,
		.procname	= "overflowuid",
		.data		= &fs_overflowuid,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &minolduid,
		.extra2		= &maxolduid,
	},
	{
		.ctl_name	= FS_OVERFLOWGID,
		.procname	= "overflowgid",
		.data		= &fs_overflowgid,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &minolduid,
		.extra2		= &maxolduid,
	},
	{
		.ctl_name	= FS_LEASES,
		.procname	= "leases-enable",
		.data		= &leases_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#ifdef CONFIG_DNOTIFY
	{
		.ctl_name	= FS_DIR_NOTIFY,
		.procname	= "dir-notify-enable",
		.data		= &dir_notify_enable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
#endif
#ifdef CONFIG_MMU
	{
		.ctl_name	= FS_LEASE_TIME,
		.procname	= "lease-break-time",
		.data		= &lease_break_time,
		.maxlen		= sizeof(int),
		.mode		= 0644,
1285 1286 1287 1288
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &zero,
		.extra2		= &two,
Linus Torvalds's avatar
Linus Torvalds committed
1289 1290 1291 1292 1293 1294
	},
	{
		.procname	= "aio-nr",
		.data		= &aio_nr,
		.maxlen		= sizeof(aio_nr),
		.mode		= 0444,
1295
		.proc_handler	= &proc_doulongvec_minmax,
Linus Torvalds's avatar
Linus Torvalds committed
1296 1297 1298 1299 1300 1301
	},
	{
		.procname	= "aio-max-nr",
		.data		= &aio_max_nr,
		.maxlen		= sizeof(aio_max_nr),
		.mode		= 0644,
1302
		.proc_handler	= &proc_doulongvec_minmax,
Linus Torvalds's avatar
Linus Torvalds committed
1303
	},
1304
#ifdef CONFIG_INOTIFY_USER
Robert Love's avatar
Robert Love committed
1305 1306 1307 1308 1309 1310 1311
	{
		.ctl_name	= FS_INOTIFY,
		.procname	= "inotify",
		.mode		= 0555,
		.child		= inotify_table,
	},
#endif	
Linus Torvalds's avatar
Linus Torvalds committed
1312
#endif
Alan Cox's avatar
Alan Cox committed
1313 1314 1315 1316 1317 1318 1319 1320
	{
		.ctl_name	= KERN_SETUID_DUMPABLE,
		.procname	= "suid_dumpable",
		.data		= &suid_dumpable,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
1321 1322 1323 1324 1325 1326 1327 1328
#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "binfmt_misc",
		.mode		= 0555,
		.child		= binfmt_misc_table,
	},
#endif
1329 1330 1331 1332
/*
 * NOTE: do not add new entries to this table unless you have read
 * Documentation/sysctl/ctl_unnumbered.txt
 */
Linus Torvalds's avatar
Linus Torvalds committed
1333 1334 1335
	{ .ctl_name = 0 }
};

1336
static struct ctl_table debug_table[] = {
1337
#if defined(CONFIG_X86) || defined(CONFIG_PPC)
1338 1339 1340 1341 1342 1343 1344 1345 1346
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "exception-trace",
		.data		= &show_unhandled_signals,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
#endif
Linus Torvalds's avatar
Linus Torvalds committed
1347 1348 1349
	{ .ctl_name = 0 }
};

1350
static struct ctl_table dev_table[] = {
Linus Torvalds's avatar
Linus Torvalds committed
1351
	{ .ctl_name = 0 }