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Merge branch 'drm-next-4.7' of git://people.freedesktop.org/~agd5f/linux into drm...
[deliverable/linux.git] / kernel / sysctl.c
1 /*
2 * sysctl.c: General linux system control interface
3 *
4 * Begun 24 March 1995, Stephen Tweedie
5 * Added /proc support, Dec 1995
6 * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
7 * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.
8 * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver.
9 * Dynamic registration fixes, Stephen Tweedie.
10 * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
11 * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris
12 * Horn.
13 * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer.
14 * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer.
15 * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill
16 * Wendling.
17 * The list_for_each() macro wasn't appropriate for the sysctl loop.
18 * Removed it and replaced it with older style, 03/23/00, Bill Wendling
19 */
20
21 #include <linux/module.h>
22 #include <linux/aio.h>
23 #include <linux/mm.h>
24 #include <linux/swap.h>
25 #include <linux/slab.h>
26 #include <linux/sysctl.h>
27 #include <linux/bitmap.h>
28 #include <linux/signal.h>
29 #include <linux/printk.h>
30 #include <linux/proc_fs.h>
31 #include <linux/security.h>
32 #include <linux/ctype.h>
33 #include <linux/kmemcheck.h>
34 #include <linux/kmemleak.h>
35 #include <linux/fs.h>
36 #include <linux/init.h>
37 #include <linux/kernel.h>
38 #include <linux/kobject.h>
39 #include <linux/net.h>
40 #include <linux/sysrq.h>
41 #include <linux/highuid.h>
42 #include <linux/writeback.h>
43 #include <linux/ratelimit.h>
44 #include <linux/compaction.h>
45 #include <linux/hugetlb.h>
46 #include <linux/initrd.h>
47 #include <linux/key.h>
48 #include <linux/times.h>
49 #include <linux/limits.h>
50 #include <linux/dcache.h>
51 #include <linux/dnotify.h>
52 #include <linux/syscalls.h>
53 #include <linux/vmstat.h>
54 #include <linux/nfs_fs.h>
55 #include <linux/acpi.h>
56 #include <linux/reboot.h>
57 #include <linux/ftrace.h>
58 #include <linux/perf_event.h>
59 #include <linux/kprobes.h>
60 #include <linux/pipe_fs_i.h>
61 #include <linux/oom.h>
62 #include <linux/kmod.h>
63 #include <linux/capability.h>
64 #include <linux/binfmts.h>
65 #include <linux/sched/sysctl.h>
66 #include <linux/kexec.h>
67 #include <linux/bpf.h>
68
69 #include <asm/uaccess.h>
70 #include <asm/processor.h>
71
72 #ifdef CONFIG_X86
73 #include <asm/nmi.h>
74 #include <asm/stacktrace.h>
75 #include <asm/io.h>
76 #endif
77 #ifdef CONFIG_SPARC
78 #include <asm/setup.h>
79 #endif
80 #ifdef CONFIG_BSD_PROCESS_ACCT
81 #include <linux/acct.h>
82 #endif
83 #ifdef CONFIG_RT_MUTEXES
84 #include <linux/rtmutex.h>
85 #endif
86 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT)
87 #include <linux/lockdep.h>
88 #endif
89 #ifdef CONFIG_CHR_DEV_SG
90 #include <scsi/sg.h>
91 #endif
92
93 #ifdef CONFIG_LOCKUP_DETECTOR
94 #include <linux/nmi.h>
95 #endif
96
97 #if defined(CONFIG_SYSCTL)
98
99 /* External variables not in a header file. */
100 extern int suid_dumpable;
101 #ifdef CONFIG_COREDUMP
102 extern int core_uses_pid;
103 extern char core_pattern[];
104 extern unsigned int core_pipe_limit;
105 #endif
106 extern int pid_max;
107 extern int pid_max_min, pid_max_max;
108 extern int percpu_pagelist_fraction;
109 extern int compat_log;
110 extern int latencytop_enabled;
111 extern int sysctl_nr_open_min, sysctl_nr_open_max;
112 #ifndef CONFIG_MMU
113 extern int sysctl_nr_trim_pages;
114 #endif
115
116 /* Constants used for minimum and maximum */
117 #ifdef CONFIG_LOCKUP_DETECTOR
118 static int sixty = 60;
119 #endif
120
121 static int __maybe_unused neg_one = -1;
122
123 static int zero;
124 static int __maybe_unused one = 1;
125 static int __maybe_unused two = 2;
126 static int __maybe_unused four = 4;
127 static unsigned long one_ul = 1;
128 static int one_hundred = 100;
129 static int one_thousand = 1000;
130 #ifdef CONFIG_PRINTK
131 static int ten_thousand = 10000;
132 #endif
133 #ifdef CONFIG_PERF_EVENTS
134 static int six_hundred_forty_kb = 640 * 1024;
135 #endif
136
137 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
138 static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
139
140 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
141 static int maxolduid = 65535;
142 static int minolduid;
143
144 static int ngroups_max = NGROUPS_MAX;
145 static const int cap_last_cap = CAP_LAST_CAP;
146
147 /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */
148 #ifdef CONFIG_DETECT_HUNG_TASK
149 static unsigned long hung_task_timeout_max = (LONG_MAX/HZ);
150 #endif
151
152 #ifdef CONFIG_INOTIFY_USER
153 #include <linux/inotify.h>
154 #endif
155 #ifdef CONFIG_SPARC
156 #endif
157
158 #ifdef __hppa__
159 extern int pwrsw_enabled;
160 #endif
161
162 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
163 extern int unaligned_enabled;
164 #endif
165
166 #ifdef CONFIG_IA64
167 extern int unaligned_dump_stack;
168 #endif
169
170 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
171 extern int no_unaligned_warning;
172 #endif
173
174 #ifdef CONFIG_PROC_SYSCTL
175
176 #define SYSCTL_WRITES_LEGACY -1
177 #define SYSCTL_WRITES_WARN 0
178 #define SYSCTL_WRITES_STRICT 1
179
180 static int sysctl_writes_strict = SYSCTL_WRITES_STRICT;
181
182 static int proc_do_cad_pid(struct ctl_table *table, int write,
183 void __user *buffer, size_t *lenp, loff_t *ppos);
184 static int proc_taint(struct ctl_table *table, int write,
185 void __user *buffer, size_t *lenp, loff_t *ppos);
186 #endif
187
188 #ifdef CONFIG_PRINTK
189 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
190 void __user *buffer, size_t *lenp, loff_t *ppos);
191 #endif
192
193 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
194 void __user *buffer, size_t *lenp, loff_t *ppos);
195 #ifdef CONFIG_COREDUMP
196 static int proc_dostring_coredump(struct ctl_table *table, int write,
197 void __user *buffer, size_t *lenp, loff_t *ppos);
198 #endif
199
200 #ifdef CONFIG_MAGIC_SYSRQ
201 /* Note: sysrq code uses it's own private copy */
202 static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE;
203
204 static int sysrq_sysctl_handler(struct ctl_table *table, int write,
205 void __user *buffer, size_t *lenp,
206 loff_t *ppos)
207 {
208 int error;
209
210 error = proc_dointvec(table, write, buffer, lenp, ppos);
211 if (error)
212 return error;
213
214 if (write)
215 sysrq_toggle_support(__sysrq_enabled);
216
217 return 0;
218 }
219
220 #endif
221
222 static struct ctl_table kern_table[];
223 static struct ctl_table vm_table[];
224 static struct ctl_table fs_table[];
225 static struct ctl_table debug_table[];
226 static struct ctl_table dev_table[];
227 extern struct ctl_table random_table[];
228 #ifdef CONFIG_EPOLL
229 extern struct ctl_table epoll_table[];
230 #endif
231
232 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
233 int sysctl_legacy_va_layout;
234 #endif
235
236 /* The default sysctl tables: */
237
238 static struct ctl_table sysctl_base_table[] = {
239 {
240 .procname = "kernel",
241 .mode = 0555,
242 .child = kern_table,
243 },
244 {
245 .procname = "vm",
246 .mode = 0555,
247 .child = vm_table,
248 },
249 {
250 .procname = "fs",
251 .mode = 0555,
252 .child = fs_table,
253 },
254 {
255 .procname = "debug",
256 .mode = 0555,
257 .child = debug_table,
258 },
259 {
260 .procname = "dev",
261 .mode = 0555,
262 .child = dev_table,
263 },
264 { }
265 };
266
267 #ifdef CONFIG_SCHED_DEBUG
268 static int min_sched_granularity_ns = 100000; /* 100 usecs */
269 static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
270 static int min_wakeup_granularity_ns; /* 0 usecs */
271 static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
272 #ifdef CONFIG_SMP
273 static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
274 static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
275 #endif /* CONFIG_SMP */
276 #endif /* CONFIG_SCHED_DEBUG */
277
278 #ifdef CONFIG_COMPACTION
279 static int min_extfrag_threshold;
280 static int max_extfrag_threshold = 1000;
281 #endif
282
283 static struct ctl_table kern_table[] = {
284 {
285 .procname = "sched_child_runs_first",
286 .data = &sysctl_sched_child_runs_first,
287 .maxlen = sizeof(unsigned int),
288 .mode = 0644,
289 .proc_handler = proc_dointvec,
290 },
291 #ifdef CONFIG_SCHED_DEBUG
292 {
293 .procname = "sched_min_granularity_ns",
294 .data = &sysctl_sched_min_granularity,
295 .maxlen = sizeof(unsigned int),
296 .mode = 0644,
297 .proc_handler = sched_proc_update_handler,
298 .extra1 = &min_sched_granularity_ns,
299 .extra2 = &max_sched_granularity_ns,
300 },
301 {
302 .procname = "sched_latency_ns",
303 .data = &sysctl_sched_latency,
304 .maxlen = sizeof(unsigned int),
305 .mode = 0644,
306 .proc_handler = sched_proc_update_handler,
307 .extra1 = &min_sched_granularity_ns,
308 .extra2 = &max_sched_granularity_ns,
309 },
310 {
311 .procname = "sched_wakeup_granularity_ns",
312 .data = &sysctl_sched_wakeup_granularity,
313 .maxlen = sizeof(unsigned int),
314 .mode = 0644,
315 .proc_handler = sched_proc_update_handler,
316 .extra1 = &min_wakeup_granularity_ns,
317 .extra2 = &max_wakeup_granularity_ns,
318 },
319 #ifdef CONFIG_SMP
320 {
321 .procname = "sched_tunable_scaling",
322 .data = &sysctl_sched_tunable_scaling,
323 .maxlen = sizeof(enum sched_tunable_scaling),
324 .mode = 0644,
325 .proc_handler = sched_proc_update_handler,
326 .extra1 = &min_sched_tunable_scaling,
327 .extra2 = &max_sched_tunable_scaling,
328 },
329 {
330 .procname = "sched_migration_cost_ns",
331 .data = &sysctl_sched_migration_cost,
332 .maxlen = sizeof(unsigned int),
333 .mode = 0644,
334 .proc_handler = proc_dointvec,
335 },
336 {
337 .procname = "sched_nr_migrate",
338 .data = &sysctl_sched_nr_migrate,
339 .maxlen = sizeof(unsigned int),
340 .mode = 0644,
341 .proc_handler = proc_dointvec,
342 },
343 {
344 .procname = "sched_time_avg_ms",
345 .data = &sysctl_sched_time_avg,
346 .maxlen = sizeof(unsigned int),
347 .mode = 0644,
348 .proc_handler = proc_dointvec,
349 },
350 {
351 .procname = "sched_shares_window_ns",
352 .data = &sysctl_sched_shares_window,
353 .maxlen = sizeof(unsigned int),
354 .mode = 0644,
355 .proc_handler = proc_dointvec,
356 },
357 #ifdef CONFIG_SCHEDSTATS
358 {
359 .procname = "sched_schedstats",
360 .data = NULL,
361 .maxlen = sizeof(unsigned int),
362 .mode = 0644,
363 .proc_handler = sysctl_schedstats,
364 .extra1 = &zero,
365 .extra2 = &one,
366 },
367 #endif /* CONFIG_SCHEDSTATS */
368 #endif /* CONFIG_SMP */
369 #ifdef CONFIG_NUMA_BALANCING
370 {
371 .procname = "numa_balancing_scan_delay_ms",
372 .data = &sysctl_numa_balancing_scan_delay,
373 .maxlen = sizeof(unsigned int),
374 .mode = 0644,
375 .proc_handler = proc_dointvec,
376 },
377 {
378 .procname = "numa_balancing_scan_period_min_ms",
379 .data = &sysctl_numa_balancing_scan_period_min,
380 .maxlen = sizeof(unsigned int),
381 .mode = 0644,
382 .proc_handler = proc_dointvec,
383 },
384 {
385 .procname = "numa_balancing_scan_period_max_ms",
386 .data = &sysctl_numa_balancing_scan_period_max,
387 .maxlen = sizeof(unsigned int),
388 .mode = 0644,
389 .proc_handler = proc_dointvec,
390 },
391 {
392 .procname = "numa_balancing_scan_size_mb",
393 .data = &sysctl_numa_balancing_scan_size,
394 .maxlen = sizeof(unsigned int),
395 .mode = 0644,
396 .proc_handler = proc_dointvec_minmax,
397 .extra1 = &one,
398 },
399 {
400 .procname = "numa_balancing",
401 .data = NULL, /* filled in by handler */
402 .maxlen = sizeof(unsigned int),
403 .mode = 0644,
404 .proc_handler = sysctl_numa_balancing,
405 .extra1 = &zero,
406 .extra2 = &one,
407 },
408 #endif /* CONFIG_NUMA_BALANCING */
409 #endif /* CONFIG_SCHED_DEBUG */
410 {
411 .procname = "sched_rt_period_us",
412 .data = &sysctl_sched_rt_period,
413 .maxlen = sizeof(unsigned int),
414 .mode = 0644,
415 .proc_handler = sched_rt_handler,
416 },
417 {
418 .procname = "sched_rt_runtime_us",
419 .data = &sysctl_sched_rt_runtime,
420 .maxlen = sizeof(int),
421 .mode = 0644,
422 .proc_handler = sched_rt_handler,
423 },
424 {
425 .procname = "sched_rr_timeslice_ms",
426 .data = &sched_rr_timeslice,
427 .maxlen = sizeof(int),
428 .mode = 0644,
429 .proc_handler = sched_rr_handler,
430 },
431 #ifdef CONFIG_SCHED_AUTOGROUP
432 {
433 .procname = "sched_autogroup_enabled",
434 .data = &sysctl_sched_autogroup_enabled,
435 .maxlen = sizeof(unsigned int),
436 .mode = 0644,
437 .proc_handler = proc_dointvec_minmax,
438 .extra1 = &zero,
439 .extra2 = &one,
440 },
441 #endif
442 #ifdef CONFIG_CFS_BANDWIDTH
443 {
444 .procname = "sched_cfs_bandwidth_slice_us",
445 .data = &sysctl_sched_cfs_bandwidth_slice,
446 .maxlen = sizeof(unsigned int),
447 .mode = 0644,
448 .proc_handler = proc_dointvec_minmax,
449 .extra1 = &one,
450 },
451 #endif
452 #ifdef CONFIG_PROVE_LOCKING
453 {
454 .procname = "prove_locking",
455 .data = &prove_locking,
456 .maxlen = sizeof(int),
457 .mode = 0644,
458 .proc_handler = proc_dointvec,
459 },
460 #endif
461 #ifdef CONFIG_LOCK_STAT
462 {
463 .procname = "lock_stat",
464 .data = &lock_stat,
465 .maxlen = sizeof(int),
466 .mode = 0644,
467 .proc_handler = proc_dointvec,
468 },
469 #endif
470 {
471 .procname = "panic",
472 .data = &panic_timeout,
473 .maxlen = sizeof(int),
474 .mode = 0644,
475 .proc_handler = proc_dointvec,
476 },
477 #ifdef CONFIG_COREDUMP
478 {
479 .procname = "core_uses_pid",
480 .data = &core_uses_pid,
481 .maxlen = sizeof(int),
482 .mode = 0644,
483 .proc_handler = proc_dointvec,
484 },
485 {
486 .procname = "core_pattern",
487 .data = core_pattern,
488 .maxlen = CORENAME_MAX_SIZE,
489 .mode = 0644,
490 .proc_handler = proc_dostring_coredump,
491 },
492 {
493 .procname = "core_pipe_limit",
494 .data = &core_pipe_limit,
495 .maxlen = sizeof(unsigned int),
496 .mode = 0644,
497 .proc_handler = proc_dointvec,
498 },
499 #endif
500 #ifdef CONFIG_PROC_SYSCTL
501 {
502 .procname = "tainted",
503 .maxlen = sizeof(long),
504 .mode = 0644,
505 .proc_handler = proc_taint,
506 },
507 {
508 .procname = "sysctl_writes_strict",
509 .data = &sysctl_writes_strict,
510 .maxlen = sizeof(int),
511 .mode = 0644,
512 .proc_handler = proc_dointvec_minmax,
513 .extra1 = &neg_one,
514 .extra2 = &one,
515 },
516 #endif
517 #ifdef CONFIG_LATENCYTOP
518 {
519 .procname = "latencytop",
520 .data = &latencytop_enabled,
521 .maxlen = sizeof(int),
522 .mode = 0644,
523 .proc_handler = sysctl_latencytop,
524 },
525 #endif
526 #ifdef CONFIG_BLK_DEV_INITRD
527 {
528 .procname = "real-root-dev",
529 .data = &real_root_dev,
530 .maxlen = sizeof(int),
531 .mode = 0644,
532 .proc_handler = proc_dointvec,
533 },
534 #endif
535 {
536 .procname = "print-fatal-signals",
537 .data = &print_fatal_signals,
538 .maxlen = sizeof(int),
539 .mode = 0644,
540 .proc_handler = proc_dointvec,
541 },
542 #ifdef CONFIG_SPARC
543 {
544 .procname = "reboot-cmd",
545 .data = reboot_command,
546 .maxlen = 256,
547 .mode = 0644,
548 .proc_handler = proc_dostring,
549 },
550 {
551 .procname = "stop-a",
552 .data = &stop_a_enabled,
553 .maxlen = sizeof (int),
554 .mode = 0644,
555 .proc_handler = proc_dointvec,
556 },
557 {
558 .procname = "scons-poweroff",
559 .data = &scons_pwroff,
560 .maxlen = sizeof (int),
561 .mode = 0644,
562 .proc_handler = proc_dointvec,
563 },
564 #endif
565 #ifdef CONFIG_SPARC64
566 {
567 .procname = "tsb-ratio",
568 .data = &sysctl_tsb_ratio,
569 .maxlen = sizeof (int),
570 .mode = 0644,
571 .proc_handler = proc_dointvec,
572 },
573 #endif
574 #ifdef __hppa__
575 {
576 .procname = "soft-power",
577 .data = &pwrsw_enabled,
578 .maxlen = sizeof (int),
579 .mode = 0644,
580 .proc_handler = proc_dointvec,
581 },
582 #endif
583 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
584 {
585 .procname = "unaligned-trap",
586 .data = &unaligned_enabled,
587 .maxlen = sizeof (int),
588 .mode = 0644,
589 .proc_handler = proc_dointvec,
590 },
591 #endif
592 {
593 .procname = "ctrl-alt-del",
594 .data = &C_A_D,
595 .maxlen = sizeof(int),
596 .mode = 0644,
597 .proc_handler = proc_dointvec,
598 },
599 #ifdef CONFIG_FUNCTION_TRACER
600 {
601 .procname = "ftrace_enabled",
602 .data = &ftrace_enabled,
603 .maxlen = sizeof(int),
604 .mode = 0644,
605 .proc_handler = ftrace_enable_sysctl,
606 },
607 #endif
608 #ifdef CONFIG_STACK_TRACER
609 {
610 .procname = "stack_tracer_enabled",
611 .data = &stack_tracer_enabled,
612 .maxlen = sizeof(int),
613 .mode = 0644,
614 .proc_handler = stack_trace_sysctl,
615 },
616 #endif
617 #ifdef CONFIG_TRACING
618 {
619 .procname = "ftrace_dump_on_oops",
620 .data = &ftrace_dump_on_oops,
621 .maxlen = sizeof(int),
622 .mode = 0644,
623 .proc_handler = proc_dointvec,
624 },
625 {
626 .procname = "traceoff_on_warning",
627 .data = &__disable_trace_on_warning,
628 .maxlen = sizeof(__disable_trace_on_warning),
629 .mode = 0644,
630 .proc_handler = proc_dointvec,
631 },
632 {
633 .procname = "tracepoint_printk",
634 .data = &tracepoint_printk,
635 .maxlen = sizeof(tracepoint_printk),
636 .mode = 0644,
637 .proc_handler = proc_dointvec,
638 },
639 #endif
640 #ifdef CONFIG_KEXEC_CORE
641 {
642 .procname = "kexec_load_disabled",
643 .data = &kexec_load_disabled,
644 .maxlen = sizeof(int),
645 .mode = 0644,
646 /* only handle a transition from default "0" to "1" */
647 .proc_handler = proc_dointvec_minmax,
648 .extra1 = &one,
649 .extra2 = &one,
650 },
651 #endif
652 #ifdef CONFIG_MODULES
653 {
654 .procname = "modprobe",
655 .data = &modprobe_path,
656 .maxlen = KMOD_PATH_LEN,
657 .mode = 0644,
658 .proc_handler = proc_dostring,
659 },
660 {
661 .procname = "modules_disabled",
662 .data = &modules_disabled,
663 .maxlen = sizeof(int),
664 .mode = 0644,
665 /* only handle a transition from default "0" to "1" */
666 .proc_handler = proc_dointvec_minmax,
667 .extra1 = &one,
668 .extra2 = &one,
669 },
670 #endif
671 #ifdef CONFIG_UEVENT_HELPER
672 {
673 .procname = "hotplug",
674 .data = &uevent_helper,
675 .maxlen = UEVENT_HELPER_PATH_LEN,
676 .mode = 0644,
677 .proc_handler = proc_dostring,
678 },
679 #endif
680 #ifdef CONFIG_CHR_DEV_SG
681 {
682 .procname = "sg-big-buff",
683 .data = &sg_big_buff,
684 .maxlen = sizeof (int),
685 .mode = 0444,
686 .proc_handler = proc_dointvec,
687 },
688 #endif
689 #ifdef CONFIG_BSD_PROCESS_ACCT
690 {
691 .procname = "acct",
692 .data = &acct_parm,
693 .maxlen = 3*sizeof(int),
694 .mode = 0644,
695 .proc_handler = proc_dointvec,
696 },
697 #endif
698 #ifdef CONFIG_MAGIC_SYSRQ
699 {
700 .procname = "sysrq",
701 .data = &__sysrq_enabled,
702 .maxlen = sizeof (int),
703 .mode = 0644,
704 .proc_handler = sysrq_sysctl_handler,
705 },
706 #endif
707 #ifdef CONFIG_PROC_SYSCTL
708 {
709 .procname = "cad_pid",
710 .data = NULL,
711 .maxlen = sizeof (int),
712 .mode = 0600,
713 .proc_handler = proc_do_cad_pid,
714 },
715 #endif
716 {
717 .procname = "threads-max",
718 .data = NULL,
719 .maxlen = sizeof(int),
720 .mode = 0644,
721 .proc_handler = sysctl_max_threads,
722 },
723 {
724 .procname = "random",
725 .mode = 0555,
726 .child = random_table,
727 },
728 {
729 .procname = "usermodehelper",
730 .mode = 0555,
731 .child = usermodehelper_table,
732 },
733 {
734 .procname = "overflowuid",
735 .data = &overflowuid,
736 .maxlen = sizeof(int),
737 .mode = 0644,
738 .proc_handler = proc_dointvec_minmax,
739 .extra1 = &minolduid,
740 .extra2 = &maxolduid,
741 },
742 {
743 .procname = "overflowgid",
744 .data = &overflowgid,
745 .maxlen = sizeof(int),
746 .mode = 0644,
747 .proc_handler = proc_dointvec_minmax,
748 .extra1 = &minolduid,
749 .extra2 = &maxolduid,
750 },
751 #ifdef CONFIG_S390
752 #ifdef CONFIG_MATHEMU
753 {
754 .procname = "ieee_emulation_warnings",
755 .data = &sysctl_ieee_emulation_warnings,
756 .maxlen = sizeof(int),
757 .mode = 0644,
758 .proc_handler = proc_dointvec,
759 },
760 #endif
761 {
762 .procname = "userprocess_debug",
763 .data = &show_unhandled_signals,
764 .maxlen = sizeof(int),
765 .mode = 0644,
766 .proc_handler = proc_dointvec,
767 },
768 #endif
769 {
770 .procname = "pid_max",
771 .data = &pid_max,
772 .maxlen = sizeof (int),
773 .mode = 0644,
774 .proc_handler = proc_dointvec_minmax,
775 .extra1 = &pid_max_min,
776 .extra2 = &pid_max_max,
777 },
778 {
779 .procname = "panic_on_oops",
780 .data = &panic_on_oops,
781 .maxlen = sizeof(int),
782 .mode = 0644,
783 .proc_handler = proc_dointvec,
784 },
785 #if defined CONFIG_PRINTK
786 {
787 .procname = "printk",
788 .data = &console_loglevel,
789 .maxlen = 4*sizeof(int),
790 .mode = 0644,
791 .proc_handler = proc_dointvec,
792 },
793 {
794 .procname = "printk_ratelimit",
795 .data = &printk_ratelimit_state.interval,
796 .maxlen = sizeof(int),
797 .mode = 0644,
798 .proc_handler = proc_dointvec_jiffies,
799 },
800 {
801 .procname = "printk_ratelimit_burst",
802 .data = &printk_ratelimit_state.burst,
803 .maxlen = sizeof(int),
804 .mode = 0644,
805 .proc_handler = proc_dointvec,
806 },
807 {
808 .procname = "printk_delay",
809 .data = &printk_delay_msec,
810 .maxlen = sizeof(int),
811 .mode = 0644,
812 .proc_handler = proc_dointvec_minmax,
813 .extra1 = &zero,
814 .extra2 = &ten_thousand,
815 },
816 {
817 .procname = "dmesg_restrict",
818 .data = &dmesg_restrict,
819 .maxlen = sizeof(int),
820 .mode = 0644,
821 .proc_handler = proc_dointvec_minmax_sysadmin,
822 .extra1 = &zero,
823 .extra2 = &one,
824 },
825 {
826 .procname = "kptr_restrict",
827 .data = &kptr_restrict,
828 .maxlen = sizeof(int),
829 .mode = 0644,
830 .proc_handler = proc_dointvec_minmax_sysadmin,
831 .extra1 = &zero,
832 .extra2 = &two,
833 },
834 #endif
835 {
836 .procname = "ngroups_max",
837 .data = &ngroups_max,
838 .maxlen = sizeof (int),
839 .mode = 0444,
840 .proc_handler = proc_dointvec,
841 },
842 {
843 .procname = "cap_last_cap",
844 .data = (void *)&cap_last_cap,
845 .maxlen = sizeof(int),
846 .mode = 0444,
847 .proc_handler = proc_dointvec,
848 },
849 #if defined(CONFIG_LOCKUP_DETECTOR)
850 {
851 .procname = "watchdog",
852 .data = &watchdog_user_enabled,
853 .maxlen = sizeof (int),
854 .mode = 0644,
855 .proc_handler = proc_watchdog,
856 .extra1 = &zero,
857 .extra2 = &one,
858 },
859 {
860 .procname = "watchdog_thresh",
861 .data = &watchdog_thresh,
862 .maxlen = sizeof(int),
863 .mode = 0644,
864 .proc_handler = proc_watchdog_thresh,
865 .extra1 = &zero,
866 .extra2 = &sixty,
867 },
868 {
869 .procname = "nmi_watchdog",
870 .data = &nmi_watchdog_enabled,
871 .maxlen = sizeof (int),
872 .mode = 0644,
873 .proc_handler = proc_nmi_watchdog,
874 .extra1 = &zero,
875 #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
876 .extra2 = &one,
877 #else
878 .extra2 = &zero,
879 #endif
880 },
881 {
882 .procname = "soft_watchdog",
883 .data = &soft_watchdog_enabled,
884 .maxlen = sizeof (int),
885 .mode = 0644,
886 .proc_handler = proc_soft_watchdog,
887 .extra1 = &zero,
888 .extra2 = &one,
889 },
890 {
891 .procname = "watchdog_cpumask",
892 .data = &watchdog_cpumask_bits,
893 .maxlen = NR_CPUS,
894 .mode = 0644,
895 .proc_handler = proc_watchdog_cpumask,
896 },
897 {
898 .procname = "softlockup_panic",
899 .data = &softlockup_panic,
900 .maxlen = sizeof(int),
901 .mode = 0644,
902 .proc_handler = proc_dointvec_minmax,
903 .extra1 = &zero,
904 .extra2 = &one,
905 },
906 #ifdef CONFIG_HARDLOCKUP_DETECTOR
907 {
908 .procname = "hardlockup_panic",
909 .data = &hardlockup_panic,
910 .maxlen = sizeof(int),
911 .mode = 0644,
912 .proc_handler = proc_dointvec_minmax,
913 .extra1 = &zero,
914 .extra2 = &one,
915 },
916 #endif
917 #ifdef CONFIG_SMP
918 {
919 .procname = "softlockup_all_cpu_backtrace",
920 .data = &sysctl_softlockup_all_cpu_backtrace,
921 .maxlen = sizeof(int),
922 .mode = 0644,
923 .proc_handler = proc_dointvec_minmax,
924 .extra1 = &zero,
925 .extra2 = &one,
926 },
927 {
928 .procname = "hardlockup_all_cpu_backtrace",
929 .data = &sysctl_hardlockup_all_cpu_backtrace,
930 .maxlen = sizeof(int),
931 .mode = 0644,
932 .proc_handler = proc_dointvec_minmax,
933 .extra1 = &zero,
934 .extra2 = &one,
935 },
936 #endif /* CONFIG_SMP */
937 #endif
938 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
939 {
940 .procname = "unknown_nmi_panic",
941 .data = &unknown_nmi_panic,
942 .maxlen = sizeof (int),
943 .mode = 0644,
944 .proc_handler = proc_dointvec,
945 },
946 #endif
947 #if defined(CONFIG_X86)
948 {
949 .procname = "panic_on_unrecovered_nmi",
950 .data = &panic_on_unrecovered_nmi,
951 .maxlen = sizeof(int),
952 .mode = 0644,
953 .proc_handler = proc_dointvec,
954 },
955 {
956 .procname = "panic_on_io_nmi",
957 .data = &panic_on_io_nmi,
958 .maxlen = sizeof(int),
959 .mode = 0644,
960 .proc_handler = proc_dointvec,
961 },
962 #ifdef CONFIG_DEBUG_STACKOVERFLOW
963 {
964 .procname = "panic_on_stackoverflow",
965 .data = &sysctl_panic_on_stackoverflow,
966 .maxlen = sizeof(int),
967 .mode = 0644,
968 .proc_handler = proc_dointvec,
969 },
970 #endif
971 {
972 .procname = "bootloader_type",
973 .data = &bootloader_type,
974 .maxlen = sizeof (int),
975 .mode = 0444,
976 .proc_handler = proc_dointvec,
977 },
978 {
979 .procname = "bootloader_version",
980 .data = &bootloader_version,
981 .maxlen = sizeof (int),
982 .mode = 0444,
983 .proc_handler = proc_dointvec,
984 },
985 {
986 .procname = "kstack_depth_to_print",
987 .data = &kstack_depth_to_print,
988 .maxlen = sizeof(int),
989 .mode = 0644,
990 .proc_handler = proc_dointvec,
991 },
992 {
993 .procname = "io_delay_type",
994 .data = &io_delay_type,
995 .maxlen = sizeof(int),
996 .mode = 0644,
997 .proc_handler = proc_dointvec,
998 },
999 #endif
1000 #if defined(CONFIG_MMU)
1001 {
1002 .procname = "randomize_va_space",
1003 .data = &randomize_va_space,
1004 .maxlen = sizeof(int),
1005 .mode = 0644,
1006 .proc_handler = proc_dointvec,
1007 },
1008 #endif
1009 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
1010 {
1011 .procname = "spin_retry",
1012 .data = &spin_retry,
1013 .maxlen = sizeof (int),
1014 .mode = 0644,
1015 .proc_handler = proc_dointvec,
1016 },
1017 #endif
1018 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
1019 {
1020 .procname = "acpi_video_flags",
1021 .data = &acpi_realmode_flags,
1022 .maxlen = sizeof (unsigned long),
1023 .mode = 0644,
1024 .proc_handler = proc_doulongvec_minmax,
1025 },
1026 #endif
1027 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
1028 {
1029 .procname = "ignore-unaligned-usertrap",
1030 .data = &no_unaligned_warning,
1031 .maxlen = sizeof (int),
1032 .mode = 0644,
1033 .proc_handler = proc_dointvec,
1034 },
1035 #endif
1036 #ifdef CONFIG_IA64
1037 {
1038 .procname = "unaligned-dump-stack",
1039 .data = &unaligned_dump_stack,
1040 .maxlen = sizeof (int),
1041 .mode = 0644,
1042 .proc_handler = proc_dointvec,
1043 },
1044 #endif
1045 #ifdef CONFIG_DETECT_HUNG_TASK
1046 {
1047 .procname = "hung_task_panic",
1048 .data = &sysctl_hung_task_panic,
1049 .maxlen = sizeof(int),
1050 .mode = 0644,
1051 .proc_handler = proc_dointvec_minmax,
1052 .extra1 = &zero,
1053 .extra2 = &one,
1054 },
1055 {
1056 .procname = "hung_task_check_count",
1057 .data = &sysctl_hung_task_check_count,
1058 .maxlen = sizeof(int),
1059 .mode = 0644,
1060 .proc_handler = proc_dointvec_minmax,
1061 .extra1 = &zero,
1062 },
1063 {
1064 .procname = "hung_task_timeout_secs",
1065 .data = &sysctl_hung_task_timeout_secs,
1066 .maxlen = sizeof(unsigned long),
1067 .mode = 0644,
1068 .proc_handler = proc_dohung_task_timeout_secs,
1069 .extra2 = &hung_task_timeout_max,
1070 },
1071 {
1072 .procname = "hung_task_warnings",
1073 .data = &sysctl_hung_task_warnings,
1074 .maxlen = sizeof(int),
1075 .mode = 0644,
1076 .proc_handler = proc_dointvec_minmax,
1077 .extra1 = &neg_one,
1078 },
1079 #endif
1080 #ifdef CONFIG_COMPAT
1081 {
1082 .procname = "compat-log",
1083 .data = &compat_log,
1084 .maxlen = sizeof (int),
1085 .mode = 0644,
1086 .proc_handler = proc_dointvec,
1087 },
1088 #endif
1089 #ifdef CONFIG_RT_MUTEXES
1090 {
1091 .procname = "max_lock_depth",
1092 .data = &max_lock_depth,
1093 .maxlen = sizeof(int),
1094 .mode = 0644,
1095 .proc_handler = proc_dointvec,
1096 },
1097 #endif
1098 {
1099 .procname = "poweroff_cmd",
1100 .data = &poweroff_cmd,
1101 .maxlen = POWEROFF_CMD_PATH_LEN,
1102 .mode = 0644,
1103 .proc_handler = proc_dostring,
1104 },
1105 #ifdef CONFIG_KEYS
1106 {
1107 .procname = "keys",
1108 .mode = 0555,
1109 .child = key_sysctls,
1110 },
1111 #endif
1112 #ifdef CONFIG_PERF_EVENTS
1113 /*
1114 * User-space scripts rely on the existence of this file
1115 * as a feature check for perf_events being enabled.
1116 *
1117 * So it's an ABI, do not remove!
1118 */
1119 {
1120 .procname = "perf_event_paranoid",
1121 .data = &sysctl_perf_event_paranoid,
1122 .maxlen = sizeof(sysctl_perf_event_paranoid),
1123 .mode = 0644,
1124 .proc_handler = proc_dointvec,
1125 },
1126 {
1127 .procname = "perf_event_mlock_kb",
1128 .data = &sysctl_perf_event_mlock,
1129 .maxlen = sizeof(sysctl_perf_event_mlock),
1130 .mode = 0644,
1131 .proc_handler = proc_dointvec,
1132 },
1133 {
1134 .procname = "perf_event_max_sample_rate",
1135 .data = &sysctl_perf_event_sample_rate,
1136 .maxlen = sizeof(sysctl_perf_event_sample_rate),
1137 .mode = 0644,
1138 .proc_handler = perf_proc_update_handler,
1139 .extra1 = &one,
1140 },
1141 {
1142 .procname = "perf_cpu_time_max_percent",
1143 .data = &sysctl_perf_cpu_time_max_percent,
1144 .maxlen = sizeof(sysctl_perf_cpu_time_max_percent),
1145 .mode = 0644,
1146 .proc_handler = perf_cpu_time_max_percent_handler,
1147 .extra1 = &zero,
1148 .extra2 = &one_hundred,
1149 },
1150 {
1151 .procname = "perf_event_max_stack",
1152 .data = NULL, /* filled in by handler */
1153 .maxlen = sizeof(sysctl_perf_event_max_stack),
1154 .mode = 0644,
1155 .proc_handler = perf_event_max_stack_handler,
1156 .extra1 = &zero,
1157 .extra2 = &six_hundred_forty_kb,
1158 },
1159 #endif
1160 #ifdef CONFIG_KMEMCHECK
1161 {
1162 .procname = "kmemcheck",
1163 .data = &kmemcheck_enabled,
1164 .maxlen = sizeof(int),
1165 .mode = 0644,
1166 .proc_handler = proc_dointvec,
1167 },
1168 #endif
1169 {
1170 .procname = "panic_on_warn",
1171 .data = &panic_on_warn,
1172 .maxlen = sizeof(int),
1173 .mode = 0644,
1174 .proc_handler = proc_dointvec_minmax,
1175 .extra1 = &zero,
1176 .extra2 = &one,
1177 },
1178 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
1179 {
1180 .procname = "timer_migration",
1181 .data = &sysctl_timer_migration,
1182 .maxlen = sizeof(unsigned int),
1183 .mode = 0644,
1184 .proc_handler = timer_migration_handler,
1185 },
1186 #endif
1187 #ifdef CONFIG_BPF_SYSCALL
1188 {
1189 .procname = "unprivileged_bpf_disabled",
1190 .data = &sysctl_unprivileged_bpf_disabled,
1191 .maxlen = sizeof(sysctl_unprivileged_bpf_disabled),
1192 .mode = 0644,
1193 /* only handle a transition from default "0" to "1" */
1194 .proc_handler = proc_dointvec_minmax,
1195 .extra1 = &one,
1196 .extra2 = &one,
1197 },
1198 #endif
1199 { }
1200 };
1201
1202 static struct ctl_table vm_table[] = {
1203 {
1204 .procname = "overcommit_memory",
1205 .data = &sysctl_overcommit_memory,
1206 .maxlen = sizeof(sysctl_overcommit_memory),
1207 .mode = 0644,
1208 .proc_handler = proc_dointvec_minmax,
1209 .extra1 = &zero,
1210 .extra2 = &two,
1211 },
1212 {
1213 .procname = "panic_on_oom",
1214 .data = &sysctl_panic_on_oom,
1215 .maxlen = sizeof(sysctl_panic_on_oom),
1216 .mode = 0644,
1217 .proc_handler = proc_dointvec_minmax,
1218 .extra1 = &zero,
1219 .extra2 = &two,
1220 },
1221 {
1222 .procname = "oom_kill_allocating_task",
1223 .data = &sysctl_oom_kill_allocating_task,
1224 .maxlen = sizeof(sysctl_oom_kill_allocating_task),
1225 .mode = 0644,
1226 .proc_handler = proc_dointvec,
1227 },
1228 {
1229 .procname = "oom_dump_tasks",
1230 .data = &sysctl_oom_dump_tasks,
1231 .maxlen = sizeof(sysctl_oom_dump_tasks),
1232 .mode = 0644,
1233 .proc_handler = proc_dointvec,
1234 },
1235 {
1236 .procname = "overcommit_ratio",
1237 .data = &sysctl_overcommit_ratio,
1238 .maxlen = sizeof(sysctl_overcommit_ratio),
1239 .mode = 0644,
1240 .proc_handler = overcommit_ratio_handler,
1241 },
1242 {
1243 .procname = "overcommit_kbytes",
1244 .data = &sysctl_overcommit_kbytes,
1245 .maxlen = sizeof(sysctl_overcommit_kbytes),
1246 .mode = 0644,
1247 .proc_handler = overcommit_kbytes_handler,
1248 },
1249 {
1250 .procname = "page-cluster",
1251 .data = &page_cluster,
1252 .maxlen = sizeof(int),
1253 .mode = 0644,
1254 .proc_handler = proc_dointvec_minmax,
1255 .extra1 = &zero,
1256 },
1257 {
1258 .procname = "dirty_background_ratio",
1259 .data = &dirty_background_ratio,
1260 .maxlen = sizeof(dirty_background_ratio),
1261 .mode = 0644,
1262 .proc_handler = dirty_background_ratio_handler,
1263 .extra1 = &zero,
1264 .extra2 = &one_hundred,
1265 },
1266 {
1267 .procname = "dirty_background_bytes",
1268 .data = &dirty_background_bytes,
1269 .maxlen = sizeof(dirty_background_bytes),
1270 .mode = 0644,
1271 .proc_handler = dirty_background_bytes_handler,
1272 .extra1 = &one_ul,
1273 },
1274 {
1275 .procname = "dirty_ratio",
1276 .data = &vm_dirty_ratio,
1277 .maxlen = sizeof(vm_dirty_ratio),
1278 .mode = 0644,
1279 .proc_handler = dirty_ratio_handler,
1280 .extra1 = &zero,
1281 .extra2 = &one_hundred,
1282 },
1283 {
1284 .procname = "dirty_bytes",
1285 .data = &vm_dirty_bytes,
1286 .maxlen = sizeof(vm_dirty_bytes),
1287 .mode = 0644,
1288 .proc_handler = dirty_bytes_handler,
1289 .extra1 = &dirty_bytes_min,
1290 },
1291 {
1292 .procname = "dirty_writeback_centisecs",
1293 .data = &dirty_writeback_interval,
1294 .maxlen = sizeof(dirty_writeback_interval),
1295 .mode = 0644,
1296 .proc_handler = dirty_writeback_centisecs_handler,
1297 },
1298 {
1299 .procname = "dirty_expire_centisecs",
1300 .data = &dirty_expire_interval,
1301 .maxlen = sizeof(dirty_expire_interval),
1302 .mode = 0644,
1303 .proc_handler = proc_dointvec_minmax,
1304 .extra1 = &zero,
1305 },
1306 {
1307 .procname = "dirtytime_expire_seconds",
1308 .data = &dirtytime_expire_interval,
1309 .maxlen = sizeof(dirty_expire_interval),
1310 .mode = 0644,
1311 .proc_handler = dirtytime_interval_handler,
1312 .extra1 = &zero,
1313 },
1314 {
1315 .procname = "nr_pdflush_threads",
1316 .mode = 0444 /* read-only */,
1317 .proc_handler = pdflush_proc_obsolete,
1318 },
1319 {
1320 .procname = "swappiness",
1321 .data = &vm_swappiness,
1322 .maxlen = sizeof(vm_swappiness),
1323 .mode = 0644,
1324 .proc_handler = proc_dointvec_minmax,
1325 .extra1 = &zero,
1326 .extra2 = &one_hundred,
1327 },
1328 #ifdef CONFIG_HUGETLB_PAGE
1329 {
1330 .procname = "nr_hugepages",
1331 .data = NULL,
1332 .maxlen = sizeof(unsigned long),
1333 .mode = 0644,
1334 .proc_handler = hugetlb_sysctl_handler,
1335 },
1336 #ifdef CONFIG_NUMA
1337 {
1338 .procname = "nr_hugepages_mempolicy",
1339 .data = NULL,
1340 .maxlen = sizeof(unsigned long),
1341 .mode = 0644,
1342 .proc_handler = &hugetlb_mempolicy_sysctl_handler,
1343 },
1344 #endif
1345 {
1346 .procname = "hugetlb_shm_group",
1347 .data = &sysctl_hugetlb_shm_group,
1348 .maxlen = sizeof(gid_t),
1349 .mode = 0644,
1350 .proc_handler = proc_dointvec,
1351 },
1352 {
1353 .procname = "hugepages_treat_as_movable",
1354 .data = &hugepages_treat_as_movable,
1355 .maxlen = sizeof(int),
1356 .mode = 0644,
1357 .proc_handler = proc_dointvec,
1358 },
1359 {
1360 .procname = "nr_overcommit_hugepages",
1361 .data = NULL,
1362 .maxlen = sizeof(unsigned long),
1363 .mode = 0644,
1364 .proc_handler = hugetlb_overcommit_handler,
1365 },
1366 #endif
1367 {
1368 .procname = "lowmem_reserve_ratio",
1369 .data = &sysctl_lowmem_reserve_ratio,
1370 .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
1371 .mode = 0644,
1372 .proc_handler = lowmem_reserve_ratio_sysctl_handler,
1373 },
1374 {
1375 .procname = "drop_caches",
1376 .data = &sysctl_drop_caches,
1377 .maxlen = sizeof(int),
1378 .mode = 0644,
1379 .proc_handler = drop_caches_sysctl_handler,
1380 .extra1 = &one,
1381 .extra2 = &four,
1382 },
1383 #ifdef CONFIG_COMPACTION
1384 {
1385 .procname = "compact_memory",
1386 .data = &sysctl_compact_memory,
1387 .maxlen = sizeof(int),
1388 .mode = 0200,
1389 .proc_handler = sysctl_compaction_handler,
1390 },
1391 {
1392 .procname = "extfrag_threshold",
1393 .data = &sysctl_extfrag_threshold,
1394 .maxlen = sizeof(int),
1395 .mode = 0644,
1396 .proc_handler = sysctl_extfrag_handler,
1397 .extra1 = &min_extfrag_threshold,
1398 .extra2 = &max_extfrag_threshold,
1399 },
1400 {
1401 .procname = "compact_unevictable_allowed",
1402 .data = &sysctl_compact_unevictable_allowed,
1403 .maxlen = sizeof(int),
1404 .mode = 0644,
1405 .proc_handler = proc_dointvec,
1406 .extra1 = &zero,
1407 .extra2 = &one,
1408 },
1409
1410 #endif /* CONFIG_COMPACTION */
1411 {
1412 .procname = "min_free_kbytes",
1413 .data = &min_free_kbytes,
1414 .maxlen = sizeof(min_free_kbytes),
1415 .mode = 0644,
1416 .proc_handler = min_free_kbytes_sysctl_handler,
1417 .extra1 = &zero,
1418 },
1419 {
1420 .procname = "watermark_scale_factor",
1421 .data = &watermark_scale_factor,
1422 .maxlen = sizeof(watermark_scale_factor),
1423 .mode = 0644,
1424 .proc_handler = watermark_scale_factor_sysctl_handler,
1425 .extra1 = &one,
1426 .extra2 = &one_thousand,
1427 },
1428 {
1429 .procname = "percpu_pagelist_fraction",
1430 .data = &percpu_pagelist_fraction,
1431 .maxlen = sizeof(percpu_pagelist_fraction),
1432 .mode = 0644,
1433 .proc_handler = percpu_pagelist_fraction_sysctl_handler,
1434 .extra1 = &zero,
1435 },
1436 #ifdef CONFIG_MMU
1437 {
1438 .procname = "max_map_count",
1439 .data = &sysctl_max_map_count,
1440 .maxlen = sizeof(sysctl_max_map_count),
1441 .mode = 0644,
1442 .proc_handler = proc_dointvec_minmax,
1443 .extra1 = &zero,
1444 },
1445 #else
1446 {
1447 .procname = "nr_trim_pages",
1448 .data = &sysctl_nr_trim_pages,
1449 .maxlen = sizeof(sysctl_nr_trim_pages),
1450 .mode = 0644,
1451 .proc_handler = proc_dointvec_minmax,
1452 .extra1 = &zero,
1453 },
1454 #endif
1455 {
1456 .procname = "laptop_mode",
1457 .data = &laptop_mode,
1458 .maxlen = sizeof(laptop_mode),
1459 .mode = 0644,
1460 .proc_handler = proc_dointvec_jiffies,
1461 },
1462 {
1463 .procname = "block_dump",
1464 .data = &block_dump,
1465 .maxlen = sizeof(block_dump),
1466 .mode = 0644,
1467 .proc_handler = proc_dointvec,
1468 .extra1 = &zero,
1469 },
1470 {
1471 .procname = "vfs_cache_pressure",
1472 .data = &sysctl_vfs_cache_pressure,
1473 .maxlen = sizeof(sysctl_vfs_cache_pressure),
1474 .mode = 0644,
1475 .proc_handler = proc_dointvec,
1476 .extra1 = &zero,
1477 },
1478 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1479 {
1480 .procname = "legacy_va_layout",
1481 .data = &sysctl_legacy_va_layout,
1482 .maxlen = sizeof(sysctl_legacy_va_layout),
1483 .mode = 0644,
1484 .proc_handler = proc_dointvec,
1485 .extra1 = &zero,
1486 },
1487 #endif
1488 #ifdef CONFIG_NUMA
1489 {
1490 .procname = "zone_reclaim_mode",
1491 .data = &zone_reclaim_mode,
1492 .maxlen = sizeof(zone_reclaim_mode),
1493 .mode = 0644,
1494 .proc_handler = proc_dointvec,
1495 .extra1 = &zero,
1496 },
1497 {
1498 .procname = "min_unmapped_ratio",
1499 .data = &sysctl_min_unmapped_ratio,
1500 .maxlen = sizeof(sysctl_min_unmapped_ratio),
1501 .mode = 0644,
1502 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
1503 .extra1 = &zero,
1504 .extra2 = &one_hundred,
1505 },
1506 {
1507 .procname = "min_slab_ratio",
1508 .data = &sysctl_min_slab_ratio,
1509 .maxlen = sizeof(sysctl_min_slab_ratio),
1510 .mode = 0644,
1511 .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
1512 .extra1 = &zero,
1513 .extra2 = &one_hundred,
1514 },
1515 #endif
1516 #ifdef CONFIG_SMP
1517 {
1518 .procname = "stat_interval",
1519 .data = &sysctl_stat_interval,
1520 .maxlen = sizeof(sysctl_stat_interval),
1521 .mode = 0644,
1522 .proc_handler = proc_dointvec_jiffies,
1523 },
1524 {
1525 .procname = "stat_refresh",
1526 .data = NULL,
1527 .maxlen = 0,
1528 .mode = 0600,
1529 .proc_handler = vmstat_refresh,
1530 },
1531 #endif
1532 #ifdef CONFIG_MMU
1533 {
1534 .procname = "mmap_min_addr",
1535 .data = &dac_mmap_min_addr,
1536 .maxlen = sizeof(unsigned long),
1537 .mode = 0644,
1538 .proc_handler = mmap_min_addr_handler,
1539 },
1540 #endif
1541 #ifdef CONFIG_NUMA
1542 {
1543 .procname = "numa_zonelist_order",
1544 .data = &numa_zonelist_order,
1545 .maxlen = NUMA_ZONELIST_ORDER_LEN,
1546 .mode = 0644,
1547 .proc_handler = numa_zonelist_order_handler,
1548 },
1549 #endif
1550 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1551 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1552 {
1553 .procname = "vdso_enabled",
1554 #ifdef CONFIG_X86_32
1555 .data = &vdso32_enabled,
1556 .maxlen = sizeof(vdso32_enabled),
1557 #else
1558 .data = &vdso_enabled,
1559 .maxlen = sizeof(vdso_enabled),
1560 #endif
1561 .mode = 0644,
1562 .proc_handler = proc_dointvec,
1563 .extra1 = &zero,
1564 },
1565 #endif
1566 #ifdef CONFIG_HIGHMEM
1567 {
1568 .procname = "highmem_is_dirtyable",
1569 .data = &vm_highmem_is_dirtyable,
1570 .maxlen = sizeof(vm_highmem_is_dirtyable),
1571 .mode = 0644,
1572 .proc_handler = proc_dointvec_minmax,
1573 .extra1 = &zero,
1574 .extra2 = &one,
1575 },
1576 #endif
1577 #ifdef CONFIG_MEMORY_FAILURE
1578 {
1579 .procname = "memory_failure_early_kill",
1580 .data = &sysctl_memory_failure_early_kill,
1581 .maxlen = sizeof(sysctl_memory_failure_early_kill),
1582 .mode = 0644,
1583 .proc_handler = proc_dointvec_minmax,
1584 .extra1 = &zero,
1585 .extra2 = &one,
1586 },
1587 {
1588 .procname = "memory_failure_recovery",
1589 .data = &sysctl_memory_failure_recovery,
1590 .maxlen = sizeof(sysctl_memory_failure_recovery),
1591 .mode = 0644,
1592 .proc_handler = proc_dointvec_minmax,
1593 .extra1 = &zero,
1594 .extra2 = &one,
1595 },
1596 #endif
1597 {
1598 .procname = "user_reserve_kbytes",
1599 .data = &sysctl_user_reserve_kbytes,
1600 .maxlen = sizeof(sysctl_user_reserve_kbytes),
1601 .mode = 0644,
1602 .proc_handler = proc_doulongvec_minmax,
1603 },
1604 {
1605 .procname = "admin_reserve_kbytes",
1606 .data = &sysctl_admin_reserve_kbytes,
1607 .maxlen = sizeof(sysctl_admin_reserve_kbytes),
1608 .mode = 0644,
1609 .proc_handler = proc_doulongvec_minmax,
1610 },
1611 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS
1612 {
1613 .procname = "mmap_rnd_bits",
1614 .data = &mmap_rnd_bits,
1615 .maxlen = sizeof(mmap_rnd_bits),
1616 .mode = 0600,
1617 .proc_handler = proc_dointvec_minmax,
1618 .extra1 = (void *)&mmap_rnd_bits_min,
1619 .extra2 = (void *)&mmap_rnd_bits_max,
1620 },
1621 #endif
1622 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
1623 {
1624 .procname = "mmap_rnd_compat_bits",
1625 .data = &mmap_rnd_compat_bits,
1626 .maxlen = sizeof(mmap_rnd_compat_bits),
1627 .mode = 0600,
1628 .proc_handler = proc_dointvec_minmax,
1629 .extra1 = (void *)&mmap_rnd_compat_bits_min,
1630 .extra2 = (void *)&mmap_rnd_compat_bits_max,
1631 },
1632 #endif
1633 { }
1634 };
1635
1636 static struct ctl_table fs_table[] = {
1637 {
1638 .procname = "inode-nr",
1639 .data = &inodes_stat,
1640 .maxlen = 2*sizeof(long),
1641 .mode = 0444,
1642 .proc_handler = proc_nr_inodes,
1643 },
1644 {
1645 .procname = "inode-state",
1646 .data = &inodes_stat,
1647 .maxlen = 7*sizeof(long),
1648 .mode = 0444,
1649 .proc_handler = proc_nr_inodes,
1650 },
1651 {
1652 .procname = "file-nr",
1653 .data = &files_stat,
1654 .maxlen = sizeof(files_stat),
1655 .mode = 0444,
1656 .proc_handler = proc_nr_files,
1657 },
1658 {
1659 .procname = "file-max",
1660 .data = &files_stat.max_files,
1661 .maxlen = sizeof(files_stat.max_files),
1662 .mode = 0644,
1663 .proc_handler = proc_doulongvec_minmax,
1664 },
1665 {
1666 .procname = "nr_open",
1667 .data = &sysctl_nr_open,
1668 .maxlen = sizeof(int),
1669 .mode = 0644,
1670 .proc_handler = proc_dointvec_minmax,
1671 .extra1 = &sysctl_nr_open_min,
1672 .extra2 = &sysctl_nr_open_max,
1673 },
1674 {
1675 .procname = "dentry-state",
1676 .data = &dentry_stat,
1677 .maxlen = 6*sizeof(long),
1678 .mode = 0444,
1679 .proc_handler = proc_nr_dentry,
1680 },
1681 {
1682 .procname = "overflowuid",
1683 .data = &fs_overflowuid,
1684 .maxlen = sizeof(int),
1685 .mode = 0644,
1686 .proc_handler = proc_dointvec_minmax,
1687 .extra1 = &minolduid,
1688 .extra2 = &maxolduid,
1689 },
1690 {
1691 .procname = "overflowgid",
1692 .data = &fs_overflowgid,
1693 .maxlen = sizeof(int),
1694 .mode = 0644,
1695 .proc_handler = proc_dointvec_minmax,
1696 .extra1 = &minolduid,
1697 .extra2 = &maxolduid,
1698 },
1699 #ifdef CONFIG_FILE_LOCKING
1700 {
1701 .procname = "leases-enable",
1702 .data = &leases_enable,
1703 .maxlen = sizeof(int),
1704 .mode = 0644,
1705 .proc_handler = proc_dointvec,
1706 },
1707 #endif
1708 #ifdef CONFIG_DNOTIFY
1709 {
1710 .procname = "dir-notify-enable",
1711 .data = &dir_notify_enable,
1712 .maxlen = sizeof(int),
1713 .mode = 0644,
1714 .proc_handler = proc_dointvec,
1715 },
1716 #endif
1717 #ifdef CONFIG_MMU
1718 #ifdef CONFIG_FILE_LOCKING
1719 {
1720 .procname = "lease-break-time",
1721 .data = &lease_break_time,
1722 .maxlen = sizeof(int),
1723 .mode = 0644,
1724 .proc_handler = proc_dointvec,
1725 },
1726 #endif
1727 #ifdef CONFIG_AIO
1728 {
1729 .procname = "aio-nr",
1730 .data = &aio_nr,
1731 .maxlen = sizeof(aio_nr),
1732 .mode = 0444,
1733 .proc_handler = proc_doulongvec_minmax,
1734 },
1735 {
1736 .procname = "aio-max-nr",
1737 .data = &aio_max_nr,
1738 .maxlen = sizeof(aio_max_nr),
1739 .mode = 0644,
1740 .proc_handler = proc_doulongvec_minmax,
1741 },
1742 #endif /* CONFIG_AIO */
1743 #ifdef CONFIG_INOTIFY_USER
1744 {
1745 .procname = "inotify",
1746 .mode = 0555,
1747 .child = inotify_table,
1748 },
1749 #endif
1750 #ifdef CONFIG_EPOLL
1751 {
1752 .procname = "epoll",
1753 .mode = 0555,
1754 .child = epoll_table,
1755 },
1756 #endif
1757 #endif
1758 {
1759 .procname = "protected_symlinks",
1760 .data = &sysctl_protected_symlinks,
1761 .maxlen = sizeof(int),
1762 .mode = 0600,
1763 .proc_handler = proc_dointvec_minmax,
1764 .extra1 = &zero,
1765 .extra2 = &one,
1766 },
1767 {
1768 .procname = "protected_hardlinks",
1769 .data = &sysctl_protected_hardlinks,
1770 .maxlen = sizeof(int),
1771 .mode = 0600,
1772 .proc_handler = proc_dointvec_minmax,
1773 .extra1 = &zero,
1774 .extra2 = &one,
1775 },
1776 {
1777 .procname = "suid_dumpable",
1778 .data = &suid_dumpable,
1779 .maxlen = sizeof(int),
1780 .mode = 0644,
1781 .proc_handler = proc_dointvec_minmax_coredump,
1782 .extra1 = &zero,
1783 .extra2 = &two,
1784 },
1785 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1786 {
1787 .procname = "binfmt_misc",
1788 .mode = 0555,
1789 .child = sysctl_mount_point,
1790 },
1791 #endif
1792 {
1793 .procname = "pipe-max-size",
1794 .data = &pipe_max_size,
1795 .maxlen = sizeof(int),
1796 .mode = 0644,
1797 .proc_handler = &pipe_proc_fn,
1798 .extra1 = &pipe_min_size,
1799 },
1800 {
1801 .procname = "pipe-user-pages-hard",
1802 .data = &pipe_user_pages_hard,
1803 .maxlen = sizeof(pipe_user_pages_hard),
1804 .mode = 0644,
1805 .proc_handler = proc_doulongvec_minmax,
1806 },
1807 {
1808 .procname = "pipe-user-pages-soft",
1809 .data = &pipe_user_pages_soft,
1810 .maxlen = sizeof(pipe_user_pages_soft),
1811 .mode = 0644,
1812 .proc_handler = proc_doulongvec_minmax,
1813 },
1814 { }
1815 };
1816
1817 static struct ctl_table debug_table[] = {
1818 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
1819 {
1820 .procname = "exception-trace",
1821 .data = &show_unhandled_signals,
1822 .maxlen = sizeof(int),
1823 .mode = 0644,
1824 .proc_handler = proc_dointvec
1825 },
1826 #endif
1827 #if defined(CONFIG_OPTPROBES)
1828 {
1829 .procname = "kprobes-optimization",
1830 .data = &sysctl_kprobes_optimization,
1831 .maxlen = sizeof(int),
1832 .mode = 0644,
1833 .proc_handler = proc_kprobes_optimization_handler,
1834 .extra1 = &zero,
1835 .extra2 = &one,
1836 },
1837 #endif
1838 { }
1839 };
1840
1841 static struct ctl_table dev_table[] = {
1842 { }
1843 };
1844
1845 int __init sysctl_init(void)
1846 {
1847 struct ctl_table_header *hdr;
1848
1849 hdr = register_sysctl_table(sysctl_base_table);
1850 kmemleak_not_leak(hdr);
1851 return 0;
1852 }
1853
1854 #endif /* CONFIG_SYSCTL */
1855
1856 /*
1857 * /proc/sys support
1858 */
1859
1860 #ifdef CONFIG_PROC_SYSCTL
1861
1862 static int _proc_do_string(char *data, int maxlen, int write,
1863 char __user *buffer,
1864 size_t *lenp, loff_t *ppos)
1865 {
1866 size_t len;
1867 char __user *p;
1868 char c;
1869
1870 if (!data || !maxlen || !*lenp) {
1871 *lenp = 0;
1872 return 0;
1873 }
1874
1875 if (write) {
1876 if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) {
1877 /* Only continue writes not past the end of buffer. */
1878 len = strlen(data);
1879 if (len > maxlen - 1)
1880 len = maxlen - 1;
1881
1882 if (*ppos > len)
1883 return 0;
1884 len = *ppos;
1885 } else {
1886 /* Start writing from beginning of buffer. */
1887 len = 0;
1888 }
1889
1890 *ppos += *lenp;
1891 p = buffer;
1892 while ((p - buffer) < *lenp && len < maxlen - 1) {
1893 if (get_user(c, p++))
1894 return -EFAULT;
1895 if (c == 0 || c == '\n')
1896 break;
1897 data[len++] = c;
1898 }
1899 data[len] = 0;
1900 } else {
1901 len = strlen(data);
1902 if (len > maxlen)
1903 len = maxlen;
1904
1905 if (*ppos > len) {
1906 *lenp = 0;
1907 return 0;
1908 }
1909
1910 data += *ppos;
1911 len -= *ppos;
1912
1913 if (len > *lenp)
1914 len = *lenp;
1915 if (len)
1916 if (copy_to_user(buffer, data, len))
1917 return -EFAULT;
1918 if (len < *lenp) {
1919 if (put_user('\n', buffer + len))
1920 return -EFAULT;
1921 len++;
1922 }
1923 *lenp = len;
1924 *ppos += len;
1925 }
1926 return 0;
1927 }
1928
1929 static void warn_sysctl_write(struct ctl_table *table)
1930 {
1931 pr_warn_once("%s wrote to %s when file position was not 0!\n"
1932 "This will not be supported in the future. To silence this\n"
1933 "warning, set kernel.sysctl_writes_strict = -1\n",
1934 current->comm, table->procname);
1935 }
1936
1937 /**
1938 * proc_dostring - read a string sysctl
1939 * @table: the sysctl table
1940 * @write: %TRUE if this is a write to the sysctl file
1941 * @buffer: the user buffer
1942 * @lenp: the size of the user buffer
1943 * @ppos: file position
1944 *
1945 * Reads/writes a string from/to the user buffer. If the kernel
1946 * buffer provided is not large enough to hold the string, the
1947 * string is truncated. The copied string is %NULL-terminated.
1948 * If the string is being read by the user process, it is copied
1949 * and a newline '\n' is added. It is truncated if the buffer is
1950 * not large enough.
1951 *
1952 * Returns 0 on success.
1953 */
1954 int proc_dostring(struct ctl_table *table, int write,
1955 void __user *buffer, size_t *lenp, loff_t *ppos)
1956 {
1957 if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN)
1958 warn_sysctl_write(table);
1959
1960 return _proc_do_string((char *)(table->data), table->maxlen, write,
1961 (char __user *)buffer, lenp, ppos);
1962 }
1963
1964 static size_t proc_skip_spaces(char **buf)
1965 {
1966 size_t ret;
1967 char *tmp = skip_spaces(*buf);
1968 ret = tmp - *buf;
1969 *buf = tmp;
1970 return ret;
1971 }
1972
1973 static void proc_skip_char(char **buf, size_t *size, const char v)
1974 {
1975 while (*size) {
1976 if (**buf != v)
1977 break;
1978 (*size)--;
1979 (*buf)++;
1980 }
1981 }
1982
1983 #define TMPBUFLEN 22
1984 /**
1985 * proc_get_long - reads an ASCII formatted integer from a user buffer
1986 *
1987 * @buf: a kernel buffer
1988 * @size: size of the kernel buffer
1989 * @val: this is where the number will be stored
1990 * @neg: set to %TRUE if number is negative
1991 * @perm_tr: a vector which contains the allowed trailers
1992 * @perm_tr_len: size of the perm_tr vector
1993 * @tr: pointer to store the trailer character
1994 *
1995 * In case of success %0 is returned and @buf and @size are updated with
1996 * the amount of bytes read. If @tr is non-NULL and a trailing
1997 * character exists (size is non-zero after returning from this
1998 * function), @tr is updated with the trailing character.
1999 */
2000 static int proc_get_long(char **buf, size_t *size,
2001 unsigned long *val, bool *neg,
2002 const char *perm_tr, unsigned perm_tr_len, char *tr)
2003 {
2004 int len;
2005 char *p, tmp[TMPBUFLEN];
2006
2007 if (!*size)
2008 return -EINVAL;
2009
2010 len = *size;
2011 if (len > TMPBUFLEN - 1)
2012 len = TMPBUFLEN - 1;
2013
2014 memcpy(tmp, *buf, len);
2015
2016 tmp[len] = 0;
2017 p = tmp;
2018 if (*p == '-' && *size > 1) {
2019 *neg = true;
2020 p++;
2021 } else
2022 *neg = false;
2023 if (!isdigit(*p))
2024 return -EINVAL;
2025
2026 *val = simple_strtoul(p, &p, 0);
2027
2028 len = p - tmp;
2029
2030 /* We don't know if the next char is whitespace thus we may accept
2031 * invalid integers (e.g. 1234...a) or two integers instead of one
2032 * (e.g. 123...1). So lets not allow such large numbers. */
2033 if (len == TMPBUFLEN - 1)
2034 return -EINVAL;
2035
2036 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len))
2037 return -EINVAL;
2038
2039 if (tr && (len < *size))
2040 *tr = *p;
2041
2042 *buf += len;
2043 *size -= len;
2044
2045 return 0;
2046 }
2047
2048 /**
2049 * proc_put_long - converts an integer to a decimal ASCII formatted string
2050 *
2051 * @buf: the user buffer
2052 * @size: the size of the user buffer
2053 * @val: the integer to be converted
2054 * @neg: sign of the number, %TRUE for negative
2055 *
2056 * In case of success %0 is returned and @buf and @size are updated with
2057 * the amount of bytes written.
2058 */
2059 static int proc_put_long(void __user **buf, size_t *size, unsigned long val,
2060 bool neg)
2061 {
2062 int len;
2063 char tmp[TMPBUFLEN], *p = tmp;
2064
2065 sprintf(p, "%s%lu", neg ? "-" : "", val);
2066 len = strlen(tmp);
2067 if (len > *size)
2068 len = *size;
2069 if (copy_to_user(*buf, tmp, len))
2070 return -EFAULT;
2071 *size -= len;
2072 *buf += len;
2073 return 0;
2074 }
2075 #undef TMPBUFLEN
2076
2077 static int proc_put_char(void __user **buf, size_t *size, char c)
2078 {
2079 if (*size) {
2080 char __user **buffer = (char __user **)buf;
2081 if (put_user(c, *buffer))
2082 return -EFAULT;
2083 (*size)--, (*buffer)++;
2084 *buf = *buffer;
2085 }
2086 return 0;
2087 }
2088
2089 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
2090 int *valp,
2091 int write, void *data)
2092 {
2093 if (write) {
2094 if (*negp) {
2095 if (*lvalp > (unsigned long) INT_MAX + 1)
2096 return -EINVAL;
2097 *valp = -*lvalp;
2098 } else {
2099 if (*lvalp > (unsigned long) INT_MAX)
2100 return -EINVAL;
2101 *valp = *lvalp;
2102 }
2103 } else {
2104 int val = *valp;
2105 if (val < 0) {
2106 *negp = true;
2107 *lvalp = -(unsigned long)val;
2108 } else {
2109 *negp = false;
2110 *lvalp = (unsigned long)val;
2111 }
2112 }
2113 return 0;
2114 }
2115
2116 static const char proc_wspace_sep[] = { ' ', '\t', '\n' };
2117
2118 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
2119 int write, void __user *buffer,
2120 size_t *lenp, loff_t *ppos,
2121 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2122 int write, void *data),
2123 void *data)
2124 {
2125 int *i, vleft, first = 1, err = 0;
2126 size_t left;
2127 char *kbuf = NULL, *p;
2128
2129 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {
2130 *lenp = 0;
2131 return 0;
2132 }
2133
2134 i = (int *) tbl_data;
2135 vleft = table->maxlen / sizeof(*i);
2136 left = *lenp;
2137
2138 if (!conv)
2139 conv = do_proc_dointvec_conv;
2140
2141 if (write) {
2142 if (*ppos) {
2143 switch (sysctl_writes_strict) {
2144 case SYSCTL_WRITES_STRICT:
2145 goto out;
2146 case SYSCTL_WRITES_WARN:
2147 warn_sysctl_write(table);
2148 break;
2149 default:
2150 break;
2151 }
2152 }
2153
2154 if (left > PAGE_SIZE - 1)
2155 left = PAGE_SIZE - 1;
2156 p = kbuf = memdup_user_nul(buffer, left);
2157 if (IS_ERR(kbuf))
2158 return PTR_ERR(kbuf);
2159 }
2160
2161 for (; left && vleft--; i++, first=0) {
2162 unsigned long lval;
2163 bool neg;
2164
2165 if (write) {
2166 left -= proc_skip_spaces(&p);
2167
2168 if (!left)
2169 break;
2170 err = proc_get_long(&p, &left, &lval, &neg,
2171 proc_wspace_sep,
2172 sizeof(proc_wspace_sep), NULL);
2173 if (err)
2174 break;
2175 if (conv(&neg, &lval, i, 1, data)) {
2176 err = -EINVAL;
2177 break;
2178 }
2179 } else {
2180 if (conv(&neg, &lval, i, 0, data)) {
2181 err = -EINVAL;
2182 break;
2183 }
2184 if (!first)
2185 err = proc_put_char(&buffer, &left, '\t');
2186 if (err)
2187 break;
2188 err = proc_put_long(&buffer, &left, lval, neg);
2189 if (err)
2190 break;
2191 }
2192 }
2193
2194 if (!write && !first && left && !err)
2195 err = proc_put_char(&buffer, &left, '\n');
2196 if (write && !err && left)
2197 left -= proc_skip_spaces(&p);
2198 if (write) {
2199 kfree(kbuf);
2200 if (first)
2201 return err ? : -EINVAL;
2202 }
2203 *lenp -= left;
2204 out:
2205 *ppos += *lenp;
2206 return err;
2207 }
2208
2209 static int do_proc_dointvec(struct ctl_table *table, int write,
2210 void __user *buffer, size_t *lenp, loff_t *ppos,
2211 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2212 int write, void *data),
2213 void *data)
2214 {
2215 return __do_proc_dointvec(table->data, table, write,
2216 buffer, lenp, ppos, conv, data);
2217 }
2218
2219 /**
2220 * proc_dointvec - read a vector of integers
2221 * @table: the sysctl table
2222 * @write: %TRUE if this is a write to the sysctl file
2223 * @buffer: the user buffer
2224 * @lenp: the size of the user buffer
2225 * @ppos: file position
2226 *
2227 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2228 * values from/to the user buffer, treated as an ASCII string.
2229 *
2230 * Returns 0 on success.
2231 */
2232 int proc_dointvec(struct ctl_table *table, int write,
2233 void __user *buffer, size_t *lenp, loff_t *ppos)
2234 {
2235 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2236 NULL,NULL);
2237 }
2238
2239 /*
2240 * Taint values can only be increased
2241 * This means we can safely use a temporary.
2242 */
2243 static int proc_taint(struct ctl_table *table, int write,
2244 void __user *buffer, size_t *lenp, loff_t *ppos)
2245 {
2246 struct ctl_table t;
2247 unsigned long tmptaint = get_taint();
2248 int err;
2249
2250 if (write && !capable(CAP_SYS_ADMIN))
2251 return -EPERM;
2252
2253 t = *table;
2254 t.data = &tmptaint;
2255 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);
2256 if (err < 0)
2257 return err;
2258
2259 if (write) {
2260 /*
2261 * Poor man's atomic or. Not worth adding a primitive
2262 * to everyone's atomic.h for this
2263 */
2264 int i;
2265 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
2266 if ((tmptaint >> i) & 1)
2267 add_taint(i, LOCKDEP_STILL_OK);
2268 }
2269 }
2270
2271 return err;
2272 }
2273
2274 #ifdef CONFIG_PRINTK
2275 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
2276 void __user *buffer, size_t *lenp, loff_t *ppos)
2277 {
2278 if (write && !capable(CAP_SYS_ADMIN))
2279 return -EPERM;
2280
2281 return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
2282 }
2283 #endif
2284
2285 struct do_proc_dointvec_minmax_conv_param {
2286 int *min;
2287 int *max;
2288 };
2289
2290 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp,
2291 int *valp,
2292 int write, void *data)
2293 {
2294 struct do_proc_dointvec_minmax_conv_param *param = data;
2295 if (write) {
2296 int val = *negp ? -*lvalp : *lvalp;
2297 if ((param->min && *param->min > val) ||
2298 (param->max && *param->max < val))
2299 return -EINVAL;
2300 *valp = val;
2301 } else {
2302 int val = *valp;
2303 if (val < 0) {
2304 *negp = true;
2305 *lvalp = -(unsigned long)val;
2306 } else {
2307 *negp = false;
2308 *lvalp = (unsigned long)val;
2309 }
2310 }
2311 return 0;
2312 }
2313
2314 /**
2315 * proc_dointvec_minmax - read a vector of integers with min/max values
2316 * @table: the sysctl table
2317 * @write: %TRUE if this is a write to the sysctl file
2318 * @buffer: the user buffer
2319 * @lenp: the size of the user buffer
2320 * @ppos: file position
2321 *
2322 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2323 * values from/to the user buffer, treated as an ASCII string.
2324 *
2325 * This routine will ensure the values are within the range specified by
2326 * table->extra1 (min) and table->extra2 (max).
2327 *
2328 * Returns 0 on success.
2329 */
2330 int proc_dointvec_minmax(struct ctl_table *table, int write,
2331 void __user *buffer, size_t *lenp, loff_t *ppos)
2332 {
2333 struct do_proc_dointvec_minmax_conv_param param = {
2334 .min = (int *) table->extra1,
2335 .max = (int *) table->extra2,
2336 };
2337 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2338 do_proc_dointvec_minmax_conv, &param);
2339 }
2340
2341 static void validate_coredump_safety(void)
2342 {
2343 #ifdef CONFIG_COREDUMP
2344 if (suid_dumpable == SUID_DUMP_ROOT &&
2345 core_pattern[0] != '/' && core_pattern[0] != '|') {
2346 printk(KERN_WARNING "Unsafe core_pattern used with "\
2347 "suid_dumpable=2. Pipe handler or fully qualified "\
2348 "core dump path required.\n");
2349 }
2350 #endif
2351 }
2352
2353 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
2354 void __user *buffer, size_t *lenp, loff_t *ppos)
2355 {
2356 int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
2357 if (!error)
2358 validate_coredump_safety();
2359 return error;
2360 }
2361
2362 #ifdef CONFIG_COREDUMP
2363 static int proc_dostring_coredump(struct ctl_table *table, int write,
2364 void __user *buffer, size_t *lenp, loff_t *ppos)
2365 {
2366 int error = proc_dostring(table, write, buffer, lenp, ppos);
2367 if (!error)
2368 validate_coredump_safety();
2369 return error;
2370 }
2371 #endif
2372
2373 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
2374 void __user *buffer,
2375 size_t *lenp, loff_t *ppos,
2376 unsigned long convmul,
2377 unsigned long convdiv)
2378 {
2379 unsigned long *i, *min, *max;
2380 int vleft, first = 1, err = 0;
2381 size_t left;
2382 char *kbuf = NULL, *p;
2383
2384 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {
2385 *lenp = 0;
2386 return 0;
2387 }
2388
2389 i = (unsigned long *) data;
2390 min = (unsigned long *) table->extra1;
2391 max = (unsigned long *) table->extra2;
2392 vleft = table->maxlen / sizeof(unsigned long);
2393 left = *lenp;
2394
2395 if (write) {
2396 if (*ppos) {
2397 switch (sysctl_writes_strict) {
2398 case SYSCTL_WRITES_STRICT:
2399 goto out;
2400 case SYSCTL_WRITES_WARN:
2401 warn_sysctl_write(table);
2402 break;
2403 default:
2404 break;
2405 }
2406 }
2407
2408 if (left > PAGE_SIZE - 1)
2409 left = PAGE_SIZE - 1;
2410 p = kbuf = memdup_user_nul(buffer, left);
2411 if (IS_ERR(kbuf))
2412 return PTR_ERR(kbuf);
2413 }
2414
2415 for (; left && vleft--; i++, first = 0) {
2416 unsigned long val;
2417
2418 if (write) {
2419 bool neg;
2420
2421 left -= proc_skip_spaces(&p);
2422
2423 err = proc_get_long(&p, &left, &val, &neg,
2424 proc_wspace_sep,
2425 sizeof(proc_wspace_sep), NULL);
2426 if (err)
2427 break;
2428 if (neg)
2429 continue;
2430 if ((min && val < *min) || (max && val > *max))
2431 continue;
2432 *i = val;
2433 } else {
2434 val = convdiv * (*i) / convmul;
2435 if (!first) {
2436 err = proc_put_char(&buffer, &left, '\t');
2437 if (err)
2438 break;
2439 }
2440 err = proc_put_long(&buffer, &left, val, false);
2441 if (err)
2442 break;
2443 }
2444 }
2445
2446 if (!write && !first && left && !err)
2447 err = proc_put_char(&buffer, &left, '\n');
2448 if (write && !err)
2449 left -= proc_skip_spaces(&p);
2450 if (write) {
2451 kfree(kbuf);
2452 if (first)
2453 return err ? : -EINVAL;
2454 }
2455 *lenp -= left;
2456 out:
2457 *ppos += *lenp;
2458 return err;
2459 }
2460
2461 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
2462 void __user *buffer,
2463 size_t *lenp, loff_t *ppos,
2464 unsigned long convmul,
2465 unsigned long convdiv)
2466 {
2467 return __do_proc_doulongvec_minmax(table->data, table, write,
2468 buffer, lenp, ppos, convmul, convdiv);
2469 }
2470
2471 /**
2472 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2473 * @table: the sysctl table
2474 * @write: %TRUE if this is a write to the sysctl file
2475 * @buffer: the user buffer
2476 * @lenp: the size of the user buffer
2477 * @ppos: file position
2478 *
2479 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2480 * values from/to the user buffer, treated as an ASCII string.
2481 *
2482 * This routine will ensure the values are within the range specified by
2483 * table->extra1 (min) and table->extra2 (max).
2484 *
2485 * Returns 0 on success.
2486 */
2487 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2488 void __user *buffer, size_t *lenp, loff_t *ppos)
2489 {
2490 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);
2491 }
2492
2493 /**
2494 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2495 * @table: the sysctl table
2496 * @write: %TRUE if this is a write to the sysctl file
2497 * @buffer: the user buffer
2498 * @lenp: the size of the user buffer
2499 * @ppos: file position
2500 *
2501 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2502 * values from/to the user buffer, treated as an ASCII string. The values
2503 * are treated as milliseconds, and converted to jiffies when they are stored.
2504 *
2505 * This routine will ensure the values are within the range specified by
2506 * table->extra1 (min) and table->extra2 (max).
2507 *
2508 * Returns 0 on success.
2509 */
2510 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2511 void __user *buffer,
2512 size_t *lenp, loff_t *ppos)
2513 {
2514 return do_proc_doulongvec_minmax(table, write, buffer,
2515 lenp, ppos, HZ, 1000l);
2516 }
2517
2518
2519 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp,
2520 int *valp,
2521 int write, void *data)
2522 {
2523 if (write) {
2524 if (*lvalp > LONG_MAX / HZ)
2525 return 1;
2526 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
2527 } else {
2528 int val = *valp;
2529 unsigned long lval;
2530 if (val < 0) {
2531 *negp = true;
2532 lval = -(unsigned long)val;
2533 } else {
2534 *negp = false;
2535 lval = (unsigned long)val;
2536 }
2537 *lvalp = lval / HZ;
2538 }
2539 return 0;
2540 }
2541
2542 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp,
2543 int *valp,
2544 int write, void *data)
2545 {
2546 if (write) {
2547 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
2548 return 1;
2549 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
2550 } else {
2551 int val = *valp;
2552 unsigned long lval;
2553 if (val < 0) {
2554 *negp = true;
2555 lval = -(unsigned long)val;
2556 } else {
2557 *negp = false;
2558 lval = (unsigned long)val;
2559 }
2560 *lvalp = jiffies_to_clock_t(lval);
2561 }
2562 return 0;
2563 }
2564
2565 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp,
2566 int *valp,
2567 int write, void *data)
2568 {
2569 if (write) {
2570 unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
2571
2572 if (jif > INT_MAX)
2573 return 1;
2574 *valp = (int)jif;
2575 } else {
2576 int val = *valp;
2577 unsigned long lval;
2578 if (val < 0) {
2579 *negp = true;
2580 lval = -(unsigned long)val;
2581 } else {
2582 *negp = false;
2583 lval = (unsigned long)val;
2584 }
2585 *lvalp = jiffies_to_msecs(lval);
2586 }
2587 return 0;
2588 }
2589
2590 /**
2591 * proc_dointvec_jiffies - read a vector of integers as seconds
2592 * @table: the sysctl table
2593 * @write: %TRUE if this is a write to the sysctl file
2594 * @buffer: the user buffer
2595 * @lenp: the size of the user buffer
2596 * @ppos: file position
2597 *
2598 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2599 * values from/to the user buffer, treated as an ASCII string.
2600 * The values read are assumed to be in seconds, and are converted into
2601 * jiffies.
2602 *
2603 * Returns 0 on success.
2604 */
2605 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2606 void __user *buffer, size_t *lenp, loff_t *ppos)
2607 {
2608 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2609 do_proc_dointvec_jiffies_conv,NULL);
2610 }
2611
2612 /**
2613 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2614 * @table: the sysctl table
2615 * @write: %TRUE if this is a write to the sysctl file
2616 * @buffer: the user buffer
2617 * @lenp: the size of the user buffer
2618 * @ppos: pointer to the file position
2619 *
2620 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2621 * values from/to the user buffer, treated as an ASCII string.
2622 * The values read are assumed to be in 1/USER_HZ seconds, and
2623 * are converted into jiffies.
2624 *
2625 * Returns 0 on success.
2626 */
2627 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2628 void __user *buffer, size_t *lenp, loff_t *ppos)
2629 {
2630 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2631 do_proc_dointvec_userhz_jiffies_conv,NULL);
2632 }
2633
2634 /**
2635 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2636 * @table: the sysctl table
2637 * @write: %TRUE if this is a write to the sysctl file
2638 * @buffer: the user buffer
2639 * @lenp: the size of the user buffer
2640 * @ppos: file position
2641 * @ppos: the current position in the file
2642 *
2643 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2644 * values from/to the user buffer, treated as an ASCII string.
2645 * The values read are assumed to be in 1/1000 seconds, and
2646 * are converted into jiffies.
2647 *
2648 * Returns 0 on success.
2649 */
2650 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2651 void __user *buffer, size_t *lenp, loff_t *ppos)
2652 {
2653 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2654 do_proc_dointvec_ms_jiffies_conv, NULL);
2655 }
2656
2657 static int proc_do_cad_pid(struct ctl_table *table, int write,
2658 void __user *buffer, size_t *lenp, loff_t *ppos)
2659 {
2660 struct pid *new_pid;
2661 pid_t tmp;
2662 int r;
2663
2664 tmp = pid_vnr(cad_pid);
2665
2666 r = __do_proc_dointvec(&tmp, table, write, buffer,
2667 lenp, ppos, NULL, NULL);
2668 if (r || !write)
2669 return r;
2670
2671 new_pid = find_get_pid(tmp);
2672 if (!new_pid)
2673 return -ESRCH;
2674
2675 put_pid(xchg(&cad_pid, new_pid));
2676 return 0;
2677 }
2678
2679 /**
2680 * proc_do_large_bitmap - read/write from/to a large bitmap
2681 * @table: the sysctl table
2682 * @write: %TRUE if this is a write to the sysctl file
2683 * @buffer: the user buffer
2684 * @lenp: the size of the user buffer
2685 * @ppos: file position
2686 *
2687 * The bitmap is stored at table->data and the bitmap length (in bits)
2688 * in table->maxlen.
2689 *
2690 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
2691 * large bitmaps may be represented in a compact manner. Writing into
2692 * the file will clear the bitmap then update it with the given input.
2693 *
2694 * Returns 0 on success.
2695 */
2696 int proc_do_large_bitmap(struct ctl_table *table, int write,
2697 void __user *buffer, size_t *lenp, loff_t *ppos)
2698 {
2699 int err = 0;
2700 bool first = 1;
2701 size_t left = *lenp;
2702 unsigned long bitmap_len = table->maxlen;
2703 unsigned long *bitmap = *(unsigned long **) table->data;
2704 unsigned long *tmp_bitmap = NULL;
2705 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c;
2706
2707 if (!bitmap || !bitmap_len || !left || (*ppos && !write)) {
2708 *lenp = 0;
2709 return 0;
2710 }
2711
2712 if (write) {
2713 char *kbuf, *p;
2714
2715 if (left > PAGE_SIZE - 1)
2716 left = PAGE_SIZE - 1;
2717
2718 p = kbuf = memdup_user_nul(buffer, left);
2719 if (IS_ERR(kbuf))
2720 return PTR_ERR(kbuf);
2721
2722 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long),
2723 GFP_KERNEL);
2724 if (!tmp_bitmap) {
2725 kfree(kbuf);
2726 return -ENOMEM;
2727 }
2728 proc_skip_char(&p, &left, '\n');
2729 while (!err && left) {
2730 unsigned long val_a, val_b;
2731 bool neg;
2732
2733 err = proc_get_long(&p, &left, &val_a, &neg, tr_a,
2734 sizeof(tr_a), &c);
2735 if (err)
2736 break;
2737 if (val_a >= bitmap_len || neg) {
2738 err = -EINVAL;
2739 break;
2740 }
2741
2742 val_b = val_a;
2743 if (left) {
2744 p++;
2745 left--;
2746 }
2747
2748 if (c == '-') {
2749 err = proc_get_long(&p, &left, &val_b,
2750 &neg, tr_b, sizeof(tr_b),
2751 &c);
2752 if (err)
2753 break;
2754 if (val_b >= bitmap_len || neg ||
2755 val_a > val_b) {
2756 err = -EINVAL;
2757 break;
2758 }
2759 if (left) {
2760 p++;
2761 left--;
2762 }
2763 }
2764
2765 bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
2766 first = 0;
2767 proc_skip_char(&p, &left, '\n');
2768 }
2769 kfree(kbuf);
2770 } else {
2771 unsigned long bit_a, bit_b = 0;
2772
2773 while (left) {
2774 bit_a = find_next_bit(bitmap, bitmap_len, bit_b);
2775 if (bit_a >= bitmap_len)
2776 break;
2777 bit_b = find_next_zero_bit(bitmap, bitmap_len,
2778 bit_a + 1) - 1;
2779
2780 if (!first) {
2781 err = proc_put_char(&buffer, &left, ',');
2782 if (err)
2783 break;
2784 }
2785 err = proc_put_long(&buffer, &left, bit_a, false);
2786 if (err)
2787 break;
2788 if (bit_a != bit_b) {
2789 err = proc_put_char(&buffer, &left, '-');
2790 if (err)
2791 break;
2792 err = proc_put_long(&buffer, &left, bit_b, false);
2793 if (err)
2794 break;
2795 }
2796
2797 first = 0; bit_b++;
2798 }
2799 if (!err)
2800 err = proc_put_char(&buffer, &left, '\n');
2801 }
2802
2803 if (!err) {
2804 if (write) {
2805 if (*ppos)
2806 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
2807 else
2808 bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
2809 }
2810 kfree(tmp_bitmap);
2811 *lenp -= left;
2812 *ppos += *lenp;
2813 return 0;
2814 } else {
2815 kfree(tmp_bitmap);
2816 return err;
2817 }
2818 }
2819
2820 #else /* CONFIG_PROC_SYSCTL */
2821
2822 int proc_dostring(struct ctl_table *table, int write,
2823 void __user *buffer, size_t *lenp, loff_t *ppos)
2824 {
2825 return -ENOSYS;
2826 }
2827
2828 int proc_dointvec(struct ctl_table *table, int write,
2829 void __user *buffer, size_t *lenp, loff_t *ppos)
2830 {
2831 return -ENOSYS;
2832 }
2833
2834 int proc_dointvec_minmax(struct ctl_table *table, int write,
2835 void __user *buffer, size_t *lenp, loff_t *ppos)
2836 {
2837 return -ENOSYS;
2838 }
2839
2840 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2841 void __user *buffer, size_t *lenp, loff_t *ppos)
2842 {
2843 return -ENOSYS;
2844 }
2845
2846 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2847 void __user *buffer, size_t *lenp, loff_t *ppos)
2848 {
2849 return -ENOSYS;
2850 }
2851
2852 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2853 void __user *buffer, size_t *lenp, loff_t *ppos)
2854 {
2855 return -ENOSYS;
2856 }
2857
2858 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2859 void __user *buffer, size_t *lenp, loff_t *ppos)
2860 {
2861 return -ENOSYS;
2862 }
2863
2864 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2865 void __user *buffer,
2866 size_t *lenp, loff_t *ppos)
2867 {
2868 return -ENOSYS;
2869 }
2870
2871
2872 #endif /* CONFIG_PROC_SYSCTL */
2873
2874 /*
2875 * No sense putting this after each symbol definition, twice,
2876 * exception granted :-)
2877 */
2878 EXPORT_SYMBOL(proc_dointvec);
2879 EXPORT_SYMBOL(proc_dointvec_jiffies);
2880 EXPORT_SYMBOL(proc_dointvec_minmax);
2881 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
2882 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
2883 EXPORT_SYMBOL(proc_dostring);
2884 EXPORT_SYMBOL(proc_doulongvec_minmax);
2885 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
Linux kernel - Deliverables
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