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[mirror_ubuntu-bionic-kernel.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 #include <linux/mount.h>
69
70 #include <asm/uaccess.h>
71 #include <asm/processor.h>
72
73 #ifdef CONFIG_X86
74 #include <asm/nmi.h>
75 #include <asm/stacktrace.h>
76 #include <asm/io.h>
77 #endif
78 #ifdef CONFIG_SPARC
79 #include <asm/setup.h>
80 #endif
81 #ifdef CONFIG_BSD_PROCESS_ACCT
82 #include <linux/acct.h>
83 #endif
84 #ifdef CONFIG_RT_MUTEXES
85 #include <linux/rtmutex.h>
86 #endif
87 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT)
88 #include <linux/lockdep.h>
89 #endif
90 #ifdef CONFIG_CHR_DEV_SG
91 #include <scsi/sg.h>
92 #endif
93
94 #ifdef CONFIG_LOCKUP_DETECTOR
95 #include <linux/nmi.h>
96 #endif
97
98 #if defined(CONFIG_SYSCTL)
99
100 /* External variables not in a header file. */
101 extern int suid_dumpable;
102 #ifdef CONFIG_COREDUMP
103 extern int core_uses_pid;
104 extern char core_pattern[];
105 extern unsigned int core_pipe_limit;
106 #endif
107 extern int pid_max;
108 extern int pid_max_min, pid_max_max;
109 extern int percpu_pagelist_fraction;
110 extern int latencytop_enabled;
111 extern unsigned 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 #ifdef CONFIG_SCHEDSTATS
351 {
352 .procname = "sched_schedstats",
353 .data = NULL,
354 .maxlen = sizeof(unsigned int),
355 .mode = 0644,
356 .proc_handler = sysctl_schedstats,
357 .extra1 = &zero,
358 .extra2 = &one,
359 },
360 #endif /* CONFIG_SCHEDSTATS */
361 #endif /* CONFIG_SMP */
362 #ifdef CONFIG_NUMA_BALANCING
363 {
364 .procname = "numa_balancing_scan_delay_ms",
365 .data = &sysctl_numa_balancing_scan_delay,
366 .maxlen = sizeof(unsigned int),
367 .mode = 0644,
368 .proc_handler = proc_dointvec,
369 },
370 {
371 .procname = "numa_balancing_scan_period_min_ms",
372 .data = &sysctl_numa_balancing_scan_period_min,
373 .maxlen = sizeof(unsigned int),
374 .mode = 0644,
375 .proc_handler = proc_dointvec,
376 },
377 {
378 .procname = "numa_balancing_scan_period_max_ms",
379 .data = &sysctl_numa_balancing_scan_period_max,
380 .maxlen = sizeof(unsigned int),
381 .mode = 0644,
382 .proc_handler = proc_dointvec,
383 },
384 {
385 .procname = "numa_balancing_scan_size_mb",
386 .data = &sysctl_numa_balancing_scan_size,
387 .maxlen = sizeof(unsigned int),
388 .mode = 0644,
389 .proc_handler = proc_dointvec_minmax,
390 .extra1 = &one,
391 },
392 {
393 .procname = "numa_balancing",
394 .data = NULL, /* filled in by handler */
395 .maxlen = sizeof(unsigned int),
396 .mode = 0644,
397 .proc_handler = sysctl_numa_balancing,
398 .extra1 = &zero,
399 .extra2 = &one,
400 },
401 #endif /* CONFIG_NUMA_BALANCING */
402 #endif /* CONFIG_SCHED_DEBUG */
403 {
404 .procname = "sched_rt_period_us",
405 .data = &sysctl_sched_rt_period,
406 .maxlen = sizeof(unsigned int),
407 .mode = 0644,
408 .proc_handler = sched_rt_handler,
409 },
410 {
411 .procname = "sched_rt_runtime_us",
412 .data = &sysctl_sched_rt_runtime,
413 .maxlen = sizeof(int),
414 .mode = 0644,
415 .proc_handler = sched_rt_handler,
416 },
417 {
418 .procname = "sched_rr_timeslice_ms",
419 .data = &sched_rr_timeslice,
420 .maxlen = sizeof(int),
421 .mode = 0644,
422 .proc_handler = sched_rr_handler,
423 },
424 #ifdef CONFIG_SCHED_AUTOGROUP
425 {
426 .procname = "sched_autogroup_enabled",
427 .data = &sysctl_sched_autogroup_enabled,
428 .maxlen = sizeof(unsigned int),
429 .mode = 0644,
430 .proc_handler = proc_dointvec_minmax,
431 .extra1 = &zero,
432 .extra2 = &one,
433 },
434 #endif
435 #ifdef CONFIG_CFS_BANDWIDTH
436 {
437 .procname = "sched_cfs_bandwidth_slice_us",
438 .data = &sysctl_sched_cfs_bandwidth_slice,
439 .maxlen = sizeof(unsigned int),
440 .mode = 0644,
441 .proc_handler = proc_dointvec_minmax,
442 .extra1 = &one,
443 },
444 #endif
445 #ifdef CONFIG_PROVE_LOCKING
446 {
447 .procname = "prove_locking",
448 .data = &prove_locking,
449 .maxlen = sizeof(int),
450 .mode = 0644,
451 .proc_handler = proc_dointvec,
452 },
453 #endif
454 #ifdef CONFIG_LOCK_STAT
455 {
456 .procname = "lock_stat",
457 .data = &lock_stat,
458 .maxlen = sizeof(int),
459 .mode = 0644,
460 .proc_handler = proc_dointvec,
461 },
462 #endif
463 {
464 .procname = "panic",
465 .data = &panic_timeout,
466 .maxlen = sizeof(int),
467 .mode = 0644,
468 .proc_handler = proc_dointvec,
469 },
470 #ifdef CONFIG_COREDUMP
471 {
472 .procname = "core_uses_pid",
473 .data = &core_uses_pid,
474 .maxlen = sizeof(int),
475 .mode = 0644,
476 .proc_handler = proc_dointvec,
477 },
478 {
479 .procname = "core_pattern",
480 .data = core_pattern,
481 .maxlen = CORENAME_MAX_SIZE,
482 .mode = 0644,
483 .proc_handler = proc_dostring_coredump,
484 },
485 {
486 .procname = "core_pipe_limit",
487 .data = &core_pipe_limit,
488 .maxlen = sizeof(unsigned int),
489 .mode = 0644,
490 .proc_handler = proc_dointvec,
491 },
492 #endif
493 #ifdef CONFIG_PROC_SYSCTL
494 {
495 .procname = "tainted",
496 .maxlen = sizeof(long),
497 .mode = 0644,
498 .proc_handler = proc_taint,
499 },
500 {
501 .procname = "sysctl_writes_strict",
502 .data = &sysctl_writes_strict,
503 .maxlen = sizeof(int),
504 .mode = 0644,
505 .proc_handler = proc_dointvec_minmax,
506 .extra1 = &neg_one,
507 .extra2 = &one,
508 },
509 #endif
510 #ifdef CONFIG_LATENCYTOP
511 {
512 .procname = "latencytop",
513 .data = &latencytop_enabled,
514 .maxlen = sizeof(int),
515 .mode = 0644,
516 .proc_handler = sysctl_latencytop,
517 },
518 #endif
519 #ifdef CONFIG_BLK_DEV_INITRD
520 {
521 .procname = "real-root-dev",
522 .data = &real_root_dev,
523 .maxlen = sizeof(int),
524 .mode = 0644,
525 .proc_handler = proc_dointvec,
526 },
527 #endif
528 {
529 .procname = "print-fatal-signals",
530 .data = &print_fatal_signals,
531 .maxlen = sizeof(int),
532 .mode = 0644,
533 .proc_handler = proc_dointvec,
534 },
535 #ifdef CONFIG_SPARC
536 {
537 .procname = "reboot-cmd",
538 .data = reboot_command,
539 .maxlen = 256,
540 .mode = 0644,
541 .proc_handler = proc_dostring,
542 },
543 {
544 .procname = "stop-a",
545 .data = &stop_a_enabled,
546 .maxlen = sizeof (int),
547 .mode = 0644,
548 .proc_handler = proc_dointvec,
549 },
550 {
551 .procname = "scons-poweroff",
552 .data = &scons_pwroff,
553 .maxlen = sizeof (int),
554 .mode = 0644,
555 .proc_handler = proc_dointvec,
556 },
557 #endif
558 #ifdef CONFIG_SPARC64
559 {
560 .procname = "tsb-ratio",
561 .data = &sysctl_tsb_ratio,
562 .maxlen = sizeof (int),
563 .mode = 0644,
564 .proc_handler = proc_dointvec,
565 },
566 #endif
567 #ifdef __hppa__
568 {
569 .procname = "soft-power",
570 .data = &pwrsw_enabled,
571 .maxlen = sizeof (int),
572 .mode = 0644,
573 .proc_handler = proc_dointvec,
574 },
575 #endif
576 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
577 {
578 .procname = "unaligned-trap",
579 .data = &unaligned_enabled,
580 .maxlen = sizeof (int),
581 .mode = 0644,
582 .proc_handler = proc_dointvec,
583 },
584 #endif
585 {
586 .procname = "ctrl-alt-del",
587 .data = &C_A_D,
588 .maxlen = sizeof(int),
589 .mode = 0644,
590 .proc_handler = proc_dointvec,
591 },
592 #ifdef CONFIG_FUNCTION_TRACER
593 {
594 .procname = "ftrace_enabled",
595 .data = &ftrace_enabled,
596 .maxlen = sizeof(int),
597 .mode = 0644,
598 .proc_handler = ftrace_enable_sysctl,
599 },
600 #endif
601 #ifdef CONFIG_STACK_TRACER
602 {
603 .procname = "stack_tracer_enabled",
604 .data = &stack_tracer_enabled,
605 .maxlen = sizeof(int),
606 .mode = 0644,
607 .proc_handler = stack_trace_sysctl,
608 },
609 #endif
610 #ifdef CONFIG_TRACING
611 {
612 .procname = "ftrace_dump_on_oops",
613 .data = &ftrace_dump_on_oops,
614 .maxlen = sizeof(int),
615 .mode = 0644,
616 .proc_handler = proc_dointvec,
617 },
618 {
619 .procname = "traceoff_on_warning",
620 .data = &__disable_trace_on_warning,
621 .maxlen = sizeof(__disable_trace_on_warning),
622 .mode = 0644,
623 .proc_handler = proc_dointvec,
624 },
625 {
626 .procname = "tracepoint_printk",
627 .data = &tracepoint_printk,
628 .maxlen = sizeof(tracepoint_printk),
629 .mode = 0644,
630 .proc_handler = proc_dointvec,
631 },
632 #endif
633 #ifdef CONFIG_KEXEC_CORE
634 {
635 .procname = "kexec_load_disabled",
636 .data = &kexec_load_disabled,
637 .maxlen = sizeof(int),
638 .mode = 0644,
639 /* only handle a transition from default "0" to "1" */
640 .proc_handler = proc_dointvec_minmax,
641 .extra1 = &one,
642 .extra2 = &one,
643 },
644 #endif
645 #ifdef CONFIG_MODULES
646 {
647 .procname = "modprobe",
648 .data = &modprobe_path,
649 .maxlen = KMOD_PATH_LEN,
650 .mode = 0644,
651 .proc_handler = proc_dostring,
652 },
653 {
654 .procname = "modules_disabled",
655 .data = &modules_disabled,
656 .maxlen = sizeof(int),
657 .mode = 0644,
658 /* only handle a transition from default "0" to "1" */
659 .proc_handler = proc_dointvec_minmax,
660 .extra1 = &one,
661 .extra2 = &one,
662 },
663 #endif
664 #ifdef CONFIG_UEVENT_HELPER
665 {
666 .procname = "hotplug",
667 .data = &uevent_helper,
668 .maxlen = UEVENT_HELPER_PATH_LEN,
669 .mode = 0644,
670 .proc_handler = proc_dostring,
671 },
672 #endif
673 #ifdef CONFIG_CHR_DEV_SG
674 {
675 .procname = "sg-big-buff",
676 .data = &sg_big_buff,
677 .maxlen = sizeof (int),
678 .mode = 0444,
679 .proc_handler = proc_dointvec,
680 },
681 #endif
682 #ifdef CONFIG_BSD_PROCESS_ACCT
683 {
684 .procname = "acct",
685 .data = &acct_parm,
686 .maxlen = 3*sizeof(int),
687 .mode = 0644,
688 .proc_handler = proc_dointvec,
689 },
690 #endif
691 #ifdef CONFIG_MAGIC_SYSRQ
692 {
693 .procname = "sysrq",
694 .data = &__sysrq_enabled,
695 .maxlen = sizeof (int),
696 .mode = 0644,
697 .proc_handler = sysrq_sysctl_handler,
698 },
699 #endif
700 #ifdef CONFIG_PROC_SYSCTL
701 {
702 .procname = "cad_pid",
703 .data = NULL,
704 .maxlen = sizeof (int),
705 .mode = 0600,
706 .proc_handler = proc_do_cad_pid,
707 },
708 #endif
709 {
710 .procname = "threads-max",
711 .data = NULL,
712 .maxlen = sizeof(int),
713 .mode = 0644,
714 .proc_handler = sysctl_max_threads,
715 },
716 {
717 .procname = "random",
718 .mode = 0555,
719 .child = random_table,
720 },
721 {
722 .procname = "usermodehelper",
723 .mode = 0555,
724 .child = usermodehelper_table,
725 },
726 {
727 .procname = "overflowuid",
728 .data = &overflowuid,
729 .maxlen = sizeof(int),
730 .mode = 0644,
731 .proc_handler = proc_dointvec_minmax,
732 .extra1 = &minolduid,
733 .extra2 = &maxolduid,
734 },
735 {
736 .procname = "overflowgid",
737 .data = &overflowgid,
738 .maxlen = sizeof(int),
739 .mode = 0644,
740 .proc_handler = proc_dointvec_minmax,
741 .extra1 = &minolduid,
742 .extra2 = &maxolduid,
743 },
744 #ifdef CONFIG_S390
745 #ifdef CONFIG_MATHEMU
746 {
747 .procname = "ieee_emulation_warnings",
748 .data = &sysctl_ieee_emulation_warnings,
749 .maxlen = sizeof(int),
750 .mode = 0644,
751 .proc_handler = proc_dointvec,
752 },
753 #endif
754 {
755 .procname = "userprocess_debug",
756 .data = &show_unhandled_signals,
757 .maxlen = sizeof(int),
758 .mode = 0644,
759 .proc_handler = proc_dointvec,
760 },
761 #endif
762 {
763 .procname = "pid_max",
764 .data = &pid_max,
765 .maxlen = sizeof (int),
766 .mode = 0644,
767 .proc_handler = proc_dointvec_minmax,
768 .extra1 = &pid_max_min,
769 .extra2 = &pid_max_max,
770 },
771 {
772 .procname = "panic_on_oops",
773 .data = &panic_on_oops,
774 .maxlen = sizeof(int),
775 .mode = 0644,
776 .proc_handler = proc_dointvec,
777 },
778 #if defined CONFIG_PRINTK
779 {
780 .procname = "printk",
781 .data = &console_loglevel,
782 .maxlen = 4*sizeof(int),
783 .mode = 0644,
784 .proc_handler = proc_dointvec,
785 },
786 {
787 .procname = "printk_ratelimit",
788 .data = &printk_ratelimit_state.interval,
789 .maxlen = sizeof(int),
790 .mode = 0644,
791 .proc_handler = proc_dointvec_jiffies,
792 },
793 {
794 .procname = "printk_ratelimit_burst",
795 .data = &printk_ratelimit_state.burst,
796 .maxlen = sizeof(int),
797 .mode = 0644,
798 .proc_handler = proc_dointvec,
799 },
800 {
801 .procname = "printk_delay",
802 .data = &printk_delay_msec,
803 .maxlen = sizeof(int),
804 .mode = 0644,
805 .proc_handler = proc_dointvec_minmax,
806 .extra1 = &zero,
807 .extra2 = &ten_thousand,
808 },
809 {
810 .procname = "printk_devkmsg",
811 .data = devkmsg_log_str,
812 .maxlen = DEVKMSG_STR_MAX_SIZE,
813 .mode = 0644,
814 .proc_handler = devkmsg_sysctl_set_loglvl,
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 = "io_delay_type",
987 .data = &io_delay_type,
988 .maxlen = sizeof(int),
989 .mode = 0644,
990 .proc_handler = proc_dointvec,
991 },
992 #endif
993 #if defined(CONFIG_MMU)
994 {
995 .procname = "randomize_va_space",
996 .data = &randomize_va_space,
997 .maxlen = sizeof(int),
998 .mode = 0644,
999 .proc_handler = proc_dointvec,
1000 },
1001 #endif
1002 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
1003 {
1004 .procname = "spin_retry",
1005 .data = &spin_retry,
1006 .maxlen = sizeof (int),
1007 .mode = 0644,
1008 .proc_handler = proc_dointvec,
1009 },
1010 #endif
1011 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
1012 {
1013 .procname = "acpi_video_flags",
1014 .data = &acpi_realmode_flags,
1015 .maxlen = sizeof (unsigned long),
1016 .mode = 0644,
1017 .proc_handler = proc_doulongvec_minmax,
1018 },
1019 #endif
1020 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
1021 {
1022 .procname = "ignore-unaligned-usertrap",
1023 .data = &no_unaligned_warning,
1024 .maxlen = sizeof (int),
1025 .mode = 0644,
1026 .proc_handler = proc_dointvec,
1027 },
1028 #endif
1029 #ifdef CONFIG_IA64
1030 {
1031 .procname = "unaligned-dump-stack",
1032 .data = &unaligned_dump_stack,
1033 .maxlen = sizeof (int),
1034 .mode = 0644,
1035 .proc_handler = proc_dointvec,
1036 },
1037 #endif
1038 #ifdef CONFIG_DETECT_HUNG_TASK
1039 {
1040 .procname = "hung_task_panic",
1041 .data = &sysctl_hung_task_panic,
1042 .maxlen = sizeof(int),
1043 .mode = 0644,
1044 .proc_handler = proc_dointvec_minmax,
1045 .extra1 = &zero,
1046 .extra2 = &one,
1047 },
1048 {
1049 .procname = "hung_task_check_count",
1050 .data = &sysctl_hung_task_check_count,
1051 .maxlen = sizeof(int),
1052 .mode = 0644,
1053 .proc_handler = proc_dointvec_minmax,
1054 .extra1 = &zero,
1055 },
1056 {
1057 .procname = "hung_task_timeout_secs",
1058 .data = &sysctl_hung_task_timeout_secs,
1059 .maxlen = sizeof(unsigned long),
1060 .mode = 0644,
1061 .proc_handler = proc_dohung_task_timeout_secs,
1062 .extra2 = &hung_task_timeout_max,
1063 },
1064 {
1065 .procname = "hung_task_warnings",
1066 .data = &sysctl_hung_task_warnings,
1067 .maxlen = sizeof(int),
1068 .mode = 0644,
1069 .proc_handler = proc_dointvec_minmax,
1070 .extra1 = &neg_one,
1071 },
1072 #endif
1073 #ifdef CONFIG_RT_MUTEXES
1074 {
1075 .procname = "max_lock_depth",
1076 .data = &max_lock_depth,
1077 .maxlen = sizeof(int),
1078 .mode = 0644,
1079 .proc_handler = proc_dointvec,
1080 },
1081 #endif
1082 {
1083 .procname = "poweroff_cmd",
1084 .data = &poweroff_cmd,
1085 .maxlen = POWEROFF_CMD_PATH_LEN,
1086 .mode = 0644,
1087 .proc_handler = proc_dostring,
1088 },
1089 #ifdef CONFIG_KEYS
1090 {
1091 .procname = "keys",
1092 .mode = 0555,
1093 .child = key_sysctls,
1094 },
1095 #endif
1096 #ifdef CONFIG_PERF_EVENTS
1097 /*
1098 * User-space scripts rely on the existence of this file
1099 * as a feature check for perf_events being enabled.
1100 *
1101 * So it's an ABI, do not remove!
1102 */
1103 {
1104 .procname = "perf_event_paranoid",
1105 .data = &sysctl_perf_event_paranoid,
1106 .maxlen = sizeof(sysctl_perf_event_paranoid),
1107 .mode = 0644,
1108 .proc_handler = proc_dointvec,
1109 },
1110 {
1111 .procname = "perf_event_mlock_kb",
1112 .data = &sysctl_perf_event_mlock,
1113 .maxlen = sizeof(sysctl_perf_event_mlock),
1114 .mode = 0644,
1115 .proc_handler = proc_dointvec,
1116 },
1117 {
1118 .procname = "perf_event_max_sample_rate",
1119 .data = &sysctl_perf_event_sample_rate,
1120 .maxlen = sizeof(sysctl_perf_event_sample_rate),
1121 .mode = 0644,
1122 .proc_handler = perf_proc_update_handler,
1123 .extra1 = &one,
1124 },
1125 {
1126 .procname = "perf_cpu_time_max_percent",
1127 .data = &sysctl_perf_cpu_time_max_percent,
1128 .maxlen = sizeof(sysctl_perf_cpu_time_max_percent),
1129 .mode = 0644,
1130 .proc_handler = perf_cpu_time_max_percent_handler,
1131 .extra1 = &zero,
1132 .extra2 = &one_hundred,
1133 },
1134 {
1135 .procname = "perf_event_max_stack",
1136 .data = &sysctl_perf_event_max_stack,
1137 .maxlen = sizeof(sysctl_perf_event_max_stack),
1138 .mode = 0644,
1139 .proc_handler = perf_event_max_stack_handler,
1140 .extra1 = &zero,
1141 .extra2 = &six_hundred_forty_kb,
1142 },
1143 {
1144 .procname = "perf_event_max_contexts_per_stack",
1145 .data = &sysctl_perf_event_max_contexts_per_stack,
1146 .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack),
1147 .mode = 0644,
1148 .proc_handler = perf_event_max_stack_handler,
1149 .extra1 = &zero,
1150 .extra2 = &one_thousand,
1151 },
1152 #endif
1153 #ifdef CONFIG_KMEMCHECK
1154 {
1155 .procname = "kmemcheck",
1156 .data = &kmemcheck_enabled,
1157 .maxlen = sizeof(int),
1158 .mode = 0644,
1159 .proc_handler = proc_dointvec,
1160 },
1161 #endif
1162 {
1163 .procname = "panic_on_warn",
1164 .data = &panic_on_warn,
1165 .maxlen = sizeof(int),
1166 .mode = 0644,
1167 .proc_handler = proc_dointvec_minmax,
1168 .extra1 = &zero,
1169 .extra2 = &one,
1170 },
1171 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
1172 {
1173 .procname = "timer_migration",
1174 .data = &sysctl_timer_migration,
1175 .maxlen = sizeof(unsigned int),
1176 .mode = 0644,
1177 .proc_handler = timer_migration_handler,
1178 },
1179 #endif
1180 #ifdef CONFIG_BPF_SYSCALL
1181 {
1182 .procname = "unprivileged_bpf_disabled",
1183 .data = &sysctl_unprivileged_bpf_disabled,
1184 .maxlen = sizeof(sysctl_unprivileged_bpf_disabled),
1185 .mode = 0644,
1186 /* only handle a transition from default "0" to "1" */
1187 .proc_handler = proc_dointvec_minmax,
1188 .extra1 = &one,
1189 .extra2 = &one,
1190 },
1191 #endif
1192 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU)
1193 {
1194 .procname = "panic_on_rcu_stall",
1195 .data = &sysctl_panic_on_rcu_stall,
1196 .maxlen = sizeof(sysctl_panic_on_rcu_stall),
1197 .mode = 0644,
1198 .proc_handler = proc_dointvec_minmax,
1199 .extra1 = &zero,
1200 .extra2 = &one,
1201 },
1202 #endif
1203 { }
1204 };
1205
1206 static struct ctl_table vm_table[] = {
1207 {
1208 .procname = "overcommit_memory",
1209 .data = &sysctl_overcommit_memory,
1210 .maxlen = sizeof(sysctl_overcommit_memory),
1211 .mode = 0644,
1212 .proc_handler = proc_dointvec_minmax,
1213 .extra1 = &zero,
1214 .extra2 = &two,
1215 },
1216 {
1217 .procname = "panic_on_oom",
1218 .data = &sysctl_panic_on_oom,
1219 .maxlen = sizeof(sysctl_panic_on_oom),
1220 .mode = 0644,
1221 .proc_handler = proc_dointvec_minmax,
1222 .extra1 = &zero,
1223 .extra2 = &two,
1224 },
1225 {
1226 .procname = "oom_kill_allocating_task",
1227 .data = &sysctl_oom_kill_allocating_task,
1228 .maxlen = sizeof(sysctl_oom_kill_allocating_task),
1229 .mode = 0644,
1230 .proc_handler = proc_dointvec,
1231 },
1232 {
1233 .procname = "oom_dump_tasks",
1234 .data = &sysctl_oom_dump_tasks,
1235 .maxlen = sizeof(sysctl_oom_dump_tasks),
1236 .mode = 0644,
1237 .proc_handler = proc_dointvec,
1238 },
1239 {
1240 .procname = "overcommit_ratio",
1241 .data = &sysctl_overcommit_ratio,
1242 .maxlen = sizeof(sysctl_overcommit_ratio),
1243 .mode = 0644,
1244 .proc_handler = overcommit_ratio_handler,
1245 },
1246 {
1247 .procname = "overcommit_kbytes",
1248 .data = &sysctl_overcommit_kbytes,
1249 .maxlen = sizeof(sysctl_overcommit_kbytes),
1250 .mode = 0644,
1251 .proc_handler = overcommit_kbytes_handler,
1252 },
1253 {
1254 .procname = "page-cluster",
1255 .data = &page_cluster,
1256 .maxlen = sizeof(int),
1257 .mode = 0644,
1258 .proc_handler = proc_dointvec_minmax,
1259 .extra1 = &zero,
1260 },
1261 {
1262 .procname = "dirty_background_ratio",
1263 .data = &dirty_background_ratio,
1264 .maxlen = sizeof(dirty_background_ratio),
1265 .mode = 0644,
1266 .proc_handler = dirty_background_ratio_handler,
1267 .extra1 = &zero,
1268 .extra2 = &one_hundred,
1269 },
1270 {
1271 .procname = "dirty_background_bytes",
1272 .data = &dirty_background_bytes,
1273 .maxlen = sizeof(dirty_background_bytes),
1274 .mode = 0644,
1275 .proc_handler = dirty_background_bytes_handler,
1276 .extra1 = &one_ul,
1277 },
1278 {
1279 .procname = "dirty_ratio",
1280 .data = &vm_dirty_ratio,
1281 .maxlen = sizeof(vm_dirty_ratio),
1282 .mode = 0644,
1283 .proc_handler = dirty_ratio_handler,
1284 .extra1 = &zero,
1285 .extra2 = &one_hundred,
1286 },
1287 {
1288 .procname = "dirty_bytes",
1289 .data = &vm_dirty_bytes,
1290 .maxlen = sizeof(vm_dirty_bytes),
1291 .mode = 0644,
1292 .proc_handler = dirty_bytes_handler,
1293 .extra1 = &dirty_bytes_min,
1294 },
1295 {
1296 .procname = "dirty_writeback_centisecs",
1297 .data = &dirty_writeback_interval,
1298 .maxlen = sizeof(dirty_writeback_interval),
1299 .mode = 0644,
1300 .proc_handler = dirty_writeback_centisecs_handler,
1301 },
1302 {
1303 .procname = "dirty_expire_centisecs",
1304 .data = &dirty_expire_interval,
1305 .maxlen = sizeof(dirty_expire_interval),
1306 .mode = 0644,
1307 .proc_handler = proc_dointvec_minmax,
1308 .extra1 = &zero,
1309 },
1310 {
1311 .procname = "dirtytime_expire_seconds",
1312 .data = &dirtytime_expire_interval,
1313 .maxlen = sizeof(dirty_expire_interval),
1314 .mode = 0644,
1315 .proc_handler = dirtytime_interval_handler,
1316 .extra1 = &zero,
1317 },
1318 {
1319 .procname = "nr_pdflush_threads",
1320 .mode = 0444 /* read-only */,
1321 .proc_handler = pdflush_proc_obsolete,
1322 },
1323 {
1324 .procname = "swappiness",
1325 .data = &vm_swappiness,
1326 .maxlen = sizeof(vm_swappiness),
1327 .mode = 0644,
1328 .proc_handler = proc_dointvec_minmax,
1329 .extra1 = &zero,
1330 .extra2 = &one_hundred,
1331 },
1332 #ifdef CONFIG_HUGETLB_PAGE
1333 {
1334 .procname = "nr_hugepages",
1335 .data = NULL,
1336 .maxlen = sizeof(unsigned long),
1337 .mode = 0644,
1338 .proc_handler = hugetlb_sysctl_handler,
1339 },
1340 #ifdef CONFIG_NUMA
1341 {
1342 .procname = "nr_hugepages_mempolicy",
1343 .data = NULL,
1344 .maxlen = sizeof(unsigned long),
1345 .mode = 0644,
1346 .proc_handler = &hugetlb_mempolicy_sysctl_handler,
1347 },
1348 #endif
1349 {
1350 .procname = "hugetlb_shm_group",
1351 .data = &sysctl_hugetlb_shm_group,
1352 .maxlen = sizeof(gid_t),
1353 .mode = 0644,
1354 .proc_handler = proc_dointvec,
1355 },
1356 {
1357 .procname = "hugepages_treat_as_movable",
1358 .data = &hugepages_treat_as_movable,
1359 .maxlen = sizeof(int),
1360 .mode = 0644,
1361 .proc_handler = proc_dointvec,
1362 },
1363 {
1364 .procname = "nr_overcommit_hugepages",
1365 .data = NULL,
1366 .maxlen = sizeof(unsigned long),
1367 .mode = 0644,
1368 .proc_handler = hugetlb_overcommit_handler,
1369 },
1370 #endif
1371 {
1372 .procname = "lowmem_reserve_ratio",
1373 .data = &sysctl_lowmem_reserve_ratio,
1374 .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
1375 .mode = 0644,
1376 .proc_handler = lowmem_reserve_ratio_sysctl_handler,
1377 },
1378 {
1379 .procname = "drop_caches",
1380 .data = &sysctl_drop_caches,
1381 .maxlen = sizeof(int),
1382 .mode = 0644,
1383 .proc_handler = drop_caches_sysctl_handler,
1384 .extra1 = &one,
1385 .extra2 = &four,
1386 },
1387 #ifdef CONFIG_COMPACTION
1388 {
1389 .procname = "compact_memory",
1390 .data = &sysctl_compact_memory,
1391 .maxlen = sizeof(int),
1392 .mode = 0200,
1393 .proc_handler = sysctl_compaction_handler,
1394 },
1395 {
1396 .procname = "extfrag_threshold",
1397 .data = &sysctl_extfrag_threshold,
1398 .maxlen = sizeof(int),
1399 .mode = 0644,
1400 .proc_handler = sysctl_extfrag_handler,
1401 .extra1 = &min_extfrag_threshold,
1402 .extra2 = &max_extfrag_threshold,
1403 },
1404 {
1405 .procname = "compact_unevictable_allowed",
1406 .data = &sysctl_compact_unevictable_allowed,
1407 .maxlen = sizeof(int),
1408 .mode = 0644,
1409 .proc_handler = proc_dointvec,
1410 .extra1 = &zero,
1411 .extra2 = &one,
1412 },
1413
1414 #endif /* CONFIG_COMPACTION */
1415 {
1416 .procname = "min_free_kbytes",
1417 .data = &min_free_kbytes,
1418 .maxlen = sizeof(min_free_kbytes),
1419 .mode = 0644,
1420 .proc_handler = min_free_kbytes_sysctl_handler,
1421 .extra1 = &zero,
1422 },
1423 {
1424 .procname = "watermark_scale_factor",
1425 .data = &watermark_scale_factor,
1426 .maxlen = sizeof(watermark_scale_factor),
1427 .mode = 0644,
1428 .proc_handler = watermark_scale_factor_sysctl_handler,
1429 .extra1 = &one,
1430 .extra2 = &one_thousand,
1431 },
1432 {
1433 .procname = "percpu_pagelist_fraction",
1434 .data = &percpu_pagelist_fraction,
1435 .maxlen = sizeof(percpu_pagelist_fraction),
1436 .mode = 0644,
1437 .proc_handler = percpu_pagelist_fraction_sysctl_handler,
1438 .extra1 = &zero,
1439 },
1440 #ifdef CONFIG_MMU
1441 {
1442 .procname = "max_map_count",
1443 .data = &sysctl_max_map_count,
1444 .maxlen = sizeof(sysctl_max_map_count),
1445 .mode = 0644,
1446 .proc_handler = proc_dointvec_minmax,
1447 .extra1 = &zero,
1448 },
1449 #else
1450 {
1451 .procname = "nr_trim_pages",
1452 .data = &sysctl_nr_trim_pages,
1453 .maxlen = sizeof(sysctl_nr_trim_pages),
1454 .mode = 0644,
1455 .proc_handler = proc_dointvec_minmax,
1456 .extra1 = &zero,
1457 },
1458 #endif
1459 {
1460 .procname = "laptop_mode",
1461 .data = &laptop_mode,
1462 .maxlen = sizeof(laptop_mode),
1463 .mode = 0644,
1464 .proc_handler = proc_dointvec_jiffies,
1465 },
1466 {
1467 .procname = "block_dump",
1468 .data = &block_dump,
1469 .maxlen = sizeof(block_dump),
1470 .mode = 0644,
1471 .proc_handler = proc_dointvec,
1472 .extra1 = &zero,
1473 },
1474 {
1475 .procname = "vfs_cache_pressure",
1476 .data = &sysctl_vfs_cache_pressure,
1477 .maxlen = sizeof(sysctl_vfs_cache_pressure),
1478 .mode = 0644,
1479 .proc_handler = proc_dointvec,
1480 .extra1 = &zero,
1481 },
1482 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1483 {
1484 .procname = "legacy_va_layout",
1485 .data = &sysctl_legacy_va_layout,
1486 .maxlen = sizeof(sysctl_legacy_va_layout),
1487 .mode = 0644,
1488 .proc_handler = proc_dointvec,
1489 .extra1 = &zero,
1490 },
1491 #endif
1492 #ifdef CONFIG_NUMA
1493 {
1494 .procname = "zone_reclaim_mode",
1495 .data = &node_reclaim_mode,
1496 .maxlen = sizeof(node_reclaim_mode),
1497 .mode = 0644,
1498 .proc_handler = proc_dointvec,
1499 .extra1 = &zero,
1500 },
1501 {
1502 .procname = "min_unmapped_ratio",
1503 .data = &sysctl_min_unmapped_ratio,
1504 .maxlen = sizeof(sysctl_min_unmapped_ratio),
1505 .mode = 0644,
1506 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
1507 .extra1 = &zero,
1508 .extra2 = &one_hundred,
1509 },
1510 {
1511 .procname = "min_slab_ratio",
1512 .data = &sysctl_min_slab_ratio,
1513 .maxlen = sizeof(sysctl_min_slab_ratio),
1514 .mode = 0644,
1515 .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
1516 .extra1 = &zero,
1517 .extra2 = &one_hundred,
1518 },
1519 #endif
1520 #ifdef CONFIG_SMP
1521 {
1522 .procname = "stat_interval",
1523 .data = &sysctl_stat_interval,
1524 .maxlen = sizeof(sysctl_stat_interval),
1525 .mode = 0644,
1526 .proc_handler = proc_dointvec_jiffies,
1527 },
1528 {
1529 .procname = "stat_refresh",
1530 .data = NULL,
1531 .maxlen = 0,
1532 .mode = 0600,
1533 .proc_handler = vmstat_refresh,
1534 },
1535 #endif
1536 #ifdef CONFIG_MMU
1537 {
1538 .procname = "mmap_min_addr",
1539 .data = &dac_mmap_min_addr,
1540 .maxlen = sizeof(unsigned long),
1541 .mode = 0644,
1542 .proc_handler = mmap_min_addr_handler,
1543 },
1544 #endif
1545 #ifdef CONFIG_NUMA
1546 {
1547 .procname = "numa_zonelist_order",
1548 .data = &numa_zonelist_order,
1549 .maxlen = NUMA_ZONELIST_ORDER_LEN,
1550 .mode = 0644,
1551 .proc_handler = numa_zonelist_order_handler,
1552 },
1553 #endif
1554 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1555 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1556 {
1557 .procname = "vdso_enabled",
1558 #ifdef CONFIG_X86_32
1559 .data = &vdso32_enabled,
1560 .maxlen = sizeof(vdso32_enabled),
1561 #else
1562 .data = &vdso_enabled,
1563 .maxlen = sizeof(vdso_enabled),
1564 #endif
1565 .mode = 0644,
1566 .proc_handler = proc_dointvec,
1567 .extra1 = &zero,
1568 },
1569 #endif
1570 #ifdef CONFIG_HIGHMEM
1571 {
1572 .procname = "highmem_is_dirtyable",
1573 .data = &vm_highmem_is_dirtyable,
1574 .maxlen = sizeof(vm_highmem_is_dirtyable),
1575 .mode = 0644,
1576 .proc_handler = proc_dointvec_minmax,
1577 .extra1 = &zero,
1578 .extra2 = &one,
1579 },
1580 #endif
1581 #ifdef CONFIG_MEMORY_FAILURE
1582 {
1583 .procname = "memory_failure_early_kill",
1584 .data = &sysctl_memory_failure_early_kill,
1585 .maxlen = sizeof(sysctl_memory_failure_early_kill),
1586 .mode = 0644,
1587 .proc_handler = proc_dointvec_minmax,
1588 .extra1 = &zero,
1589 .extra2 = &one,
1590 },
1591 {
1592 .procname = "memory_failure_recovery",
1593 .data = &sysctl_memory_failure_recovery,
1594 .maxlen = sizeof(sysctl_memory_failure_recovery),
1595 .mode = 0644,
1596 .proc_handler = proc_dointvec_minmax,
1597 .extra1 = &zero,
1598 .extra2 = &one,
1599 },
1600 #endif
1601 {
1602 .procname = "user_reserve_kbytes",
1603 .data = &sysctl_user_reserve_kbytes,
1604 .maxlen = sizeof(sysctl_user_reserve_kbytes),
1605 .mode = 0644,
1606 .proc_handler = proc_doulongvec_minmax,
1607 },
1608 {
1609 .procname = "admin_reserve_kbytes",
1610 .data = &sysctl_admin_reserve_kbytes,
1611 .maxlen = sizeof(sysctl_admin_reserve_kbytes),
1612 .mode = 0644,
1613 .proc_handler = proc_doulongvec_minmax,
1614 },
1615 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS
1616 {
1617 .procname = "mmap_rnd_bits",
1618 .data = &mmap_rnd_bits,
1619 .maxlen = sizeof(mmap_rnd_bits),
1620 .mode = 0600,
1621 .proc_handler = proc_dointvec_minmax,
1622 .extra1 = (void *)&mmap_rnd_bits_min,
1623 .extra2 = (void *)&mmap_rnd_bits_max,
1624 },
1625 #endif
1626 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
1627 {
1628 .procname = "mmap_rnd_compat_bits",
1629 .data = &mmap_rnd_compat_bits,
1630 .maxlen = sizeof(mmap_rnd_compat_bits),
1631 .mode = 0600,
1632 .proc_handler = proc_dointvec_minmax,
1633 .extra1 = (void *)&mmap_rnd_compat_bits_min,
1634 .extra2 = (void *)&mmap_rnd_compat_bits_max,
1635 },
1636 #endif
1637 { }
1638 };
1639
1640 static struct ctl_table fs_table[] = {
1641 {
1642 .procname = "inode-nr",
1643 .data = &inodes_stat,
1644 .maxlen = 2*sizeof(long),
1645 .mode = 0444,
1646 .proc_handler = proc_nr_inodes,
1647 },
1648 {
1649 .procname = "inode-state",
1650 .data = &inodes_stat,
1651 .maxlen = 7*sizeof(long),
1652 .mode = 0444,
1653 .proc_handler = proc_nr_inodes,
1654 },
1655 {
1656 .procname = "file-nr",
1657 .data = &files_stat,
1658 .maxlen = sizeof(files_stat),
1659 .mode = 0444,
1660 .proc_handler = proc_nr_files,
1661 },
1662 {
1663 .procname = "file-max",
1664 .data = &files_stat.max_files,
1665 .maxlen = sizeof(files_stat.max_files),
1666 .mode = 0644,
1667 .proc_handler = proc_doulongvec_minmax,
1668 },
1669 {
1670 .procname = "nr_open",
1671 .data = &sysctl_nr_open,
1672 .maxlen = sizeof(unsigned int),
1673 .mode = 0644,
1674 .proc_handler = proc_dointvec_minmax,
1675 .extra1 = &sysctl_nr_open_min,
1676 .extra2 = &sysctl_nr_open_max,
1677 },
1678 {
1679 .procname = "dentry-state",
1680 .data = &dentry_stat,
1681 .maxlen = 6*sizeof(long),
1682 .mode = 0444,
1683 .proc_handler = proc_nr_dentry,
1684 },
1685 {
1686 .procname = "overflowuid",
1687 .data = &fs_overflowuid,
1688 .maxlen = sizeof(int),
1689 .mode = 0644,
1690 .proc_handler = proc_dointvec_minmax,
1691 .extra1 = &minolduid,
1692 .extra2 = &maxolduid,
1693 },
1694 {
1695 .procname = "overflowgid",
1696 .data = &fs_overflowgid,
1697 .maxlen = sizeof(int),
1698 .mode = 0644,
1699 .proc_handler = proc_dointvec_minmax,
1700 .extra1 = &minolduid,
1701 .extra2 = &maxolduid,
1702 },
1703 #ifdef CONFIG_FILE_LOCKING
1704 {
1705 .procname = "leases-enable",
1706 .data = &leases_enable,
1707 .maxlen = sizeof(int),
1708 .mode = 0644,
1709 .proc_handler = proc_dointvec,
1710 },
1711 #endif
1712 #ifdef CONFIG_DNOTIFY
1713 {
1714 .procname = "dir-notify-enable",
1715 .data = &dir_notify_enable,
1716 .maxlen = sizeof(int),
1717 .mode = 0644,
1718 .proc_handler = proc_dointvec,
1719 },
1720 #endif
1721 #ifdef CONFIG_MMU
1722 #ifdef CONFIG_FILE_LOCKING
1723 {
1724 .procname = "lease-break-time",
1725 .data = &lease_break_time,
1726 .maxlen = sizeof(int),
1727 .mode = 0644,
1728 .proc_handler = proc_dointvec,
1729 },
1730 #endif
1731 #ifdef CONFIG_AIO
1732 {
1733 .procname = "aio-nr",
1734 .data = &aio_nr,
1735 .maxlen = sizeof(aio_nr),
1736 .mode = 0444,
1737 .proc_handler = proc_doulongvec_minmax,
1738 },
1739 {
1740 .procname = "aio-max-nr",
1741 .data = &aio_max_nr,
1742 .maxlen = sizeof(aio_max_nr),
1743 .mode = 0644,
1744 .proc_handler = proc_doulongvec_minmax,
1745 },
1746 #endif /* CONFIG_AIO */
1747 #ifdef CONFIG_INOTIFY_USER
1748 {
1749 .procname = "inotify",
1750 .mode = 0555,
1751 .child = inotify_table,
1752 },
1753 #endif
1754 #ifdef CONFIG_EPOLL
1755 {
1756 .procname = "epoll",
1757 .mode = 0555,
1758 .child = epoll_table,
1759 },
1760 #endif
1761 #endif
1762 {
1763 .procname = "protected_symlinks",
1764 .data = &sysctl_protected_symlinks,
1765 .maxlen = sizeof(int),
1766 .mode = 0600,
1767 .proc_handler = proc_dointvec_minmax,
1768 .extra1 = &zero,
1769 .extra2 = &one,
1770 },
1771 {
1772 .procname = "protected_hardlinks",
1773 .data = &sysctl_protected_hardlinks,
1774 .maxlen = sizeof(int),
1775 .mode = 0600,
1776 .proc_handler = proc_dointvec_minmax,
1777 .extra1 = &zero,
1778 .extra2 = &one,
1779 },
1780 {
1781 .procname = "suid_dumpable",
1782 .data = &suid_dumpable,
1783 .maxlen = sizeof(int),
1784 .mode = 0644,
1785 .proc_handler = proc_dointvec_minmax_coredump,
1786 .extra1 = &zero,
1787 .extra2 = &two,
1788 },
1789 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1790 {
1791 .procname = "binfmt_misc",
1792 .mode = 0555,
1793 .child = sysctl_mount_point,
1794 },
1795 #endif
1796 {
1797 .procname = "pipe-max-size",
1798 .data = &pipe_max_size,
1799 .maxlen = sizeof(int),
1800 .mode = 0644,
1801 .proc_handler = &pipe_proc_fn,
1802 .extra1 = &pipe_min_size,
1803 },
1804 {
1805 .procname = "pipe-user-pages-hard",
1806 .data = &pipe_user_pages_hard,
1807 .maxlen = sizeof(pipe_user_pages_hard),
1808 .mode = 0644,
1809 .proc_handler = proc_doulongvec_minmax,
1810 },
1811 {
1812 .procname = "pipe-user-pages-soft",
1813 .data = &pipe_user_pages_soft,
1814 .maxlen = sizeof(pipe_user_pages_soft),
1815 .mode = 0644,
1816 .proc_handler = proc_doulongvec_minmax,
1817 },
1818 {
1819 .procname = "mount-max",
1820 .data = &sysctl_mount_max,
1821 .maxlen = sizeof(unsigned int),
1822 .mode = 0644,
1823 .proc_handler = proc_dointvec_minmax,
1824 .extra1 = &one,
1825 },
1826 { }
1827 };
1828
1829 static struct ctl_table debug_table[] = {
1830 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
1831 {
1832 .procname = "exception-trace",
1833 .data = &show_unhandled_signals,
1834 .maxlen = sizeof(int),
1835 .mode = 0644,
1836 .proc_handler = proc_dointvec
1837 },
1838 #endif
1839 #if defined(CONFIG_OPTPROBES)
1840 {
1841 .procname = "kprobes-optimization",
1842 .data = &sysctl_kprobes_optimization,
1843 .maxlen = sizeof(int),
1844 .mode = 0644,
1845 .proc_handler = proc_kprobes_optimization_handler,
1846 .extra1 = &zero,
1847 .extra2 = &one,
1848 },
1849 #endif
1850 { }
1851 };
1852
1853 static struct ctl_table dev_table[] = {
1854 { }
1855 };
1856
1857 int __init sysctl_init(void)
1858 {
1859 struct ctl_table_header *hdr;
1860
1861 hdr = register_sysctl_table(sysctl_base_table);
1862 kmemleak_not_leak(hdr);
1863 return 0;
1864 }
1865
1866 #endif /* CONFIG_SYSCTL */
1867
1868 /*
1869 * /proc/sys support
1870 */
1871
1872 #ifdef CONFIG_PROC_SYSCTL
1873
1874 static int _proc_do_string(char *data, int maxlen, int write,
1875 char __user *buffer,
1876 size_t *lenp, loff_t *ppos)
1877 {
1878 size_t len;
1879 char __user *p;
1880 char c;
1881
1882 if (!data || !maxlen || !*lenp) {
1883 *lenp = 0;
1884 return 0;
1885 }
1886
1887 if (write) {
1888 if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) {
1889 /* Only continue writes not past the end of buffer. */
1890 len = strlen(data);
1891 if (len > maxlen - 1)
1892 len = maxlen - 1;
1893
1894 if (*ppos > len)
1895 return 0;
1896 len = *ppos;
1897 } else {
1898 /* Start writing from beginning of buffer. */
1899 len = 0;
1900 }
1901
1902 *ppos += *lenp;
1903 p = buffer;
1904 while ((p - buffer) < *lenp && len < maxlen - 1) {
1905 if (get_user(c, p++))
1906 return -EFAULT;
1907 if (c == 0 || c == '\n')
1908 break;
1909 data[len++] = c;
1910 }
1911 data[len] = 0;
1912 } else {
1913 len = strlen(data);
1914 if (len > maxlen)
1915 len = maxlen;
1916
1917 if (*ppos > len) {
1918 *lenp = 0;
1919 return 0;
1920 }
1921
1922 data += *ppos;
1923 len -= *ppos;
1924
1925 if (len > *lenp)
1926 len = *lenp;
1927 if (len)
1928 if (copy_to_user(buffer, data, len))
1929 return -EFAULT;
1930 if (len < *lenp) {
1931 if (put_user('\n', buffer + len))
1932 return -EFAULT;
1933 len++;
1934 }
1935 *lenp = len;
1936 *ppos += len;
1937 }
1938 return 0;
1939 }
1940
1941 static void warn_sysctl_write(struct ctl_table *table)
1942 {
1943 pr_warn_once("%s wrote to %s when file position was not 0!\n"
1944 "This will not be supported in the future. To silence this\n"
1945 "warning, set kernel.sysctl_writes_strict = -1\n",
1946 current->comm, table->procname);
1947 }
1948
1949 /**
1950 * proc_dostring - read a string sysctl
1951 * @table: the sysctl table
1952 * @write: %TRUE if this is a write to the sysctl file
1953 * @buffer: the user buffer
1954 * @lenp: the size of the user buffer
1955 * @ppos: file position
1956 *
1957 * Reads/writes a string from/to the user buffer. If the kernel
1958 * buffer provided is not large enough to hold the string, the
1959 * string is truncated. The copied string is %NULL-terminated.
1960 * If the string is being read by the user process, it is copied
1961 * and a newline '\n' is added. It is truncated if the buffer is
1962 * not large enough.
1963 *
1964 * Returns 0 on success.
1965 */
1966 int proc_dostring(struct ctl_table *table, int write,
1967 void __user *buffer, size_t *lenp, loff_t *ppos)
1968 {
1969 if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN)
1970 warn_sysctl_write(table);
1971
1972 return _proc_do_string((char *)(table->data), table->maxlen, write,
1973 (char __user *)buffer, lenp, ppos);
1974 }
1975
1976 static size_t proc_skip_spaces(char **buf)
1977 {
1978 size_t ret;
1979 char *tmp = skip_spaces(*buf);
1980 ret = tmp - *buf;
1981 *buf = tmp;
1982 return ret;
1983 }
1984
1985 static void proc_skip_char(char **buf, size_t *size, const char v)
1986 {
1987 while (*size) {
1988 if (**buf != v)
1989 break;
1990 (*size)--;
1991 (*buf)++;
1992 }
1993 }
1994
1995 #define TMPBUFLEN 22
1996 /**
1997 * proc_get_long - reads an ASCII formatted integer from a user buffer
1998 *
1999 * @buf: a kernel buffer
2000 * @size: size of the kernel buffer
2001 * @val: this is where the number will be stored
2002 * @neg: set to %TRUE if number is negative
2003 * @perm_tr: a vector which contains the allowed trailers
2004 * @perm_tr_len: size of the perm_tr vector
2005 * @tr: pointer to store the trailer character
2006 *
2007 * In case of success %0 is returned and @buf and @size are updated with
2008 * the amount of bytes read. If @tr is non-NULL and a trailing
2009 * character exists (size is non-zero after returning from this
2010 * function), @tr is updated with the trailing character.
2011 */
2012 static int proc_get_long(char **buf, size_t *size,
2013 unsigned long *val, bool *neg,
2014 const char *perm_tr, unsigned perm_tr_len, char *tr)
2015 {
2016 int len;
2017 char *p, tmp[TMPBUFLEN];
2018
2019 if (!*size)
2020 return -EINVAL;
2021
2022 len = *size;
2023 if (len > TMPBUFLEN - 1)
2024 len = TMPBUFLEN - 1;
2025
2026 memcpy(tmp, *buf, len);
2027
2028 tmp[len] = 0;
2029 p = tmp;
2030 if (*p == '-' && *size > 1) {
2031 *neg = true;
2032 p++;
2033 } else
2034 *neg = false;
2035 if (!isdigit(*p))
2036 return -EINVAL;
2037
2038 *val = simple_strtoul(p, &p, 0);
2039
2040 len = p - tmp;
2041
2042 /* We don't know if the next char is whitespace thus we may accept
2043 * invalid integers (e.g. 1234...a) or two integers instead of one
2044 * (e.g. 123...1). So lets not allow such large numbers. */
2045 if (len == TMPBUFLEN - 1)
2046 return -EINVAL;
2047
2048 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len))
2049 return -EINVAL;
2050
2051 if (tr && (len < *size))
2052 *tr = *p;
2053
2054 *buf += len;
2055 *size -= len;
2056
2057 return 0;
2058 }
2059
2060 /**
2061 * proc_put_long - converts an integer to a decimal ASCII formatted string
2062 *
2063 * @buf: the user buffer
2064 * @size: the size of the user buffer
2065 * @val: the integer to be converted
2066 * @neg: sign of the number, %TRUE for negative
2067 *
2068 * In case of success %0 is returned and @buf and @size are updated with
2069 * the amount of bytes written.
2070 */
2071 static int proc_put_long(void __user **buf, size_t *size, unsigned long val,
2072 bool neg)
2073 {
2074 int len;
2075 char tmp[TMPBUFLEN], *p = tmp;
2076
2077 sprintf(p, "%s%lu", neg ? "-" : "", val);
2078 len = strlen(tmp);
2079 if (len > *size)
2080 len = *size;
2081 if (copy_to_user(*buf, tmp, len))
2082 return -EFAULT;
2083 *size -= len;
2084 *buf += len;
2085 return 0;
2086 }
2087 #undef TMPBUFLEN
2088
2089 static int proc_put_char(void __user **buf, size_t *size, char c)
2090 {
2091 if (*size) {
2092 char __user **buffer = (char __user **)buf;
2093 if (put_user(c, *buffer))
2094 return -EFAULT;
2095 (*size)--, (*buffer)++;
2096 *buf = *buffer;
2097 }
2098 return 0;
2099 }
2100
2101 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
2102 int *valp,
2103 int write, void *data)
2104 {
2105 if (write) {
2106 if (*negp) {
2107 if (*lvalp > (unsigned long) INT_MAX + 1)
2108 return -EINVAL;
2109 *valp = -*lvalp;
2110 } else {
2111 if (*lvalp > (unsigned long) INT_MAX)
2112 return -EINVAL;
2113 *valp = *lvalp;
2114 }
2115 } else {
2116 int val = *valp;
2117 if (val < 0) {
2118 *negp = true;
2119 *lvalp = -(unsigned long)val;
2120 } else {
2121 *negp = false;
2122 *lvalp = (unsigned long)val;
2123 }
2124 }
2125 return 0;
2126 }
2127
2128 static int do_proc_douintvec_conv(bool *negp, unsigned long *lvalp,
2129 int *valp,
2130 int write, void *data)
2131 {
2132 if (write) {
2133 if (*negp)
2134 return -EINVAL;
2135 *valp = *lvalp;
2136 } else {
2137 unsigned int val = *valp;
2138 *lvalp = (unsigned long)val;
2139 }
2140 return 0;
2141 }
2142
2143 static const char proc_wspace_sep[] = { ' ', '\t', '\n' };
2144
2145 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
2146 int write, void __user *buffer,
2147 size_t *lenp, loff_t *ppos,
2148 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2149 int write, void *data),
2150 void *data)
2151 {
2152 int *i, vleft, first = 1, err = 0;
2153 size_t left;
2154 char *kbuf = NULL, *p;
2155
2156 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {
2157 *lenp = 0;
2158 return 0;
2159 }
2160
2161 i = (int *) tbl_data;
2162 vleft = table->maxlen / sizeof(*i);
2163 left = *lenp;
2164
2165 if (!conv)
2166 conv = do_proc_dointvec_conv;
2167
2168 if (write) {
2169 if (*ppos) {
2170 switch (sysctl_writes_strict) {
2171 case SYSCTL_WRITES_STRICT:
2172 goto out;
2173 case SYSCTL_WRITES_WARN:
2174 warn_sysctl_write(table);
2175 break;
2176 default:
2177 break;
2178 }
2179 }
2180
2181 if (left > PAGE_SIZE - 1)
2182 left = PAGE_SIZE - 1;
2183 p = kbuf = memdup_user_nul(buffer, left);
2184 if (IS_ERR(kbuf))
2185 return PTR_ERR(kbuf);
2186 }
2187
2188 for (; left && vleft--; i++, first=0) {
2189 unsigned long lval;
2190 bool neg;
2191
2192 if (write) {
2193 left -= proc_skip_spaces(&p);
2194
2195 if (!left)
2196 break;
2197 err = proc_get_long(&p, &left, &lval, &neg,
2198 proc_wspace_sep,
2199 sizeof(proc_wspace_sep), NULL);
2200 if (err)
2201 break;
2202 if (conv(&neg, &lval, i, 1, data)) {
2203 err = -EINVAL;
2204 break;
2205 }
2206 } else {
2207 if (conv(&neg, &lval, i, 0, data)) {
2208 err = -EINVAL;
2209 break;
2210 }
2211 if (!first)
2212 err = proc_put_char(&buffer, &left, '\t');
2213 if (err)
2214 break;
2215 err = proc_put_long(&buffer, &left, lval, neg);
2216 if (err)
2217 break;
2218 }
2219 }
2220
2221 if (!write && !first && left && !err)
2222 err = proc_put_char(&buffer, &left, '\n');
2223 if (write && !err && left)
2224 left -= proc_skip_spaces(&p);
2225 if (write) {
2226 kfree(kbuf);
2227 if (first)
2228 return err ? : -EINVAL;
2229 }
2230 *lenp -= left;
2231 out:
2232 *ppos += *lenp;
2233 return err;
2234 }
2235
2236 static int do_proc_dointvec(struct ctl_table *table, int write,
2237 void __user *buffer, size_t *lenp, loff_t *ppos,
2238 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2239 int write, void *data),
2240 void *data)
2241 {
2242 return __do_proc_dointvec(table->data, table, write,
2243 buffer, lenp, ppos, conv, data);
2244 }
2245
2246 /**
2247 * proc_dointvec - read a vector of integers
2248 * @table: the sysctl table
2249 * @write: %TRUE if this is a write to the sysctl file
2250 * @buffer: the user buffer
2251 * @lenp: the size of the user buffer
2252 * @ppos: file position
2253 *
2254 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2255 * values from/to the user buffer, treated as an ASCII string.
2256 *
2257 * Returns 0 on success.
2258 */
2259 int proc_dointvec(struct ctl_table *table, int write,
2260 void __user *buffer, size_t *lenp, loff_t *ppos)
2261 {
2262 return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL);
2263 }
2264
2265 /**
2266 * proc_douintvec - read a vector of unsigned integers
2267 * @table: the sysctl table
2268 * @write: %TRUE if this is a write to the sysctl file
2269 * @buffer: the user buffer
2270 * @lenp: the size of the user buffer
2271 * @ppos: file position
2272 *
2273 * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer
2274 * values from/to the user buffer, treated as an ASCII string.
2275 *
2276 * Returns 0 on success.
2277 */
2278 int proc_douintvec(struct ctl_table *table, int write,
2279 void __user *buffer, size_t *lenp, loff_t *ppos)
2280 {
2281 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2282 do_proc_douintvec_conv, NULL);
2283 }
2284
2285 /*
2286 * Taint values can only be increased
2287 * This means we can safely use a temporary.
2288 */
2289 static int proc_taint(struct ctl_table *table, int write,
2290 void __user *buffer, size_t *lenp, loff_t *ppos)
2291 {
2292 struct ctl_table t;
2293 unsigned long tmptaint = get_taint();
2294 int err;
2295
2296 if (write && !capable(CAP_SYS_ADMIN))
2297 return -EPERM;
2298
2299 t = *table;
2300 t.data = &tmptaint;
2301 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);
2302 if (err < 0)
2303 return err;
2304
2305 if (write) {
2306 /*
2307 * Poor man's atomic or. Not worth adding a primitive
2308 * to everyone's atomic.h for this
2309 */
2310 int i;
2311 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
2312 if ((tmptaint >> i) & 1)
2313 add_taint(i, LOCKDEP_STILL_OK);
2314 }
2315 }
2316
2317 return err;
2318 }
2319
2320 #ifdef CONFIG_PRINTK
2321 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
2322 void __user *buffer, size_t *lenp, loff_t *ppos)
2323 {
2324 if (write && !capable(CAP_SYS_ADMIN))
2325 return -EPERM;
2326
2327 return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
2328 }
2329 #endif
2330
2331 struct do_proc_dointvec_minmax_conv_param {
2332 int *min;
2333 int *max;
2334 };
2335
2336 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp,
2337 int *valp,
2338 int write, void *data)
2339 {
2340 struct do_proc_dointvec_minmax_conv_param *param = data;
2341 if (write) {
2342 int val = *negp ? -*lvalp : *lvalp;
2343 if ((param->min && *param->min > val) ||
2344 (param->max && *param->max < val))
2345 return -EINVAL;
2346 *valp = val;
2347 } else {
2348 int val = *valp;
2349 if (val < 0) {
2350 *negp = true;
2351 *lvalp = -(unsigned long)val;
2352 } else {
2353 *negp = false;
2354 *lvalp = (unsigned long)val;
2355 }
2356 }
2357 return 0;
2358 }
2359
2360 /**
2361 * proc_dointvec_minmax - read a vector of integers with min/max values
2362 * @table: the sysctl table
2363 * @write: %TRUE if this is a write to the sysctl file
2364 * @buffer: the user buffer
2365 * @lenp: the size of the user buffer
2366 * @ppos: file position
2367 *
2368 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2369 * values from/to the user buffer, treated as an ASCII string.
2370 *
2371 * This routine will ensure the values are within the range specified by
2372 * table->extra1 (min) and table->extra2 (max).
2373 *
2374 * Returns 0 on success.
2375 */
2376 int proc_dointvec_minmax(struct ctl_table *table, int write,
2377 void __user *buffer, size_t *lenp, loff_t *ppos)
2378 {
2379 struct do_proc_dointvec_minmax_conv_param param = {
2380 .min = (int *) table->extra1,
2381 .max = (int *) table->extra2,
2382 };
2383 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2384 do_proc_dointvec_minmax_conv, &param);
2385 }
2386
2387 static void validate_coredump_safety(void)
2388 {
2389 #ifdef CONFIG_COREDUMP
2390 if (suid_dumpable == SUID_DUMP_ROOT &&
2391 core_pattern[0] != '/' && core_pattern[0] != '|') {
2392 printk(KERN_WARNING "Unsafe core_pattern used with "\
2393 "suid_dumpable=2. Pipe handler or fully qualified "\
2394 "core dump path required.\n");
2395 }
2396 #endif
2397 }
2398
2399 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
2400 void __user *buffer, size_t *lenp, loff_t *ppos)
2401 {
2402 int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
2403 if (!error)
2404 validate_coredump_safety();
2405 return error;
2406 }
2407
2408 #ifdef CONFIG_COREDUMP
2409 static int proc_dostring_coredump(struct ctl_table *table, int write,
2410 void __user *buffer, size_t *lenp, loff_t *ppos)
2411 {
2412 int error = proc_dostring(table, write, buffer, lenp, ppos);
2413 if (!error)
2414 validate_coredump_safety();
2415 return error;
2416 }
2417 #endif
2418
2419 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
2420 void __user *buffer,
2421 size_t *lenp, loff_t *ppos,
2422 unsigned long convmul,
2423 unsigned long convdiv)
2424 {
2425 unsigned long *i, *min, *max;
2426 int vleft, first = 1, err = 0;
2427 size_t left;
2428 char *kbuf = NULL, *p;
2429
2430 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {
2431 *lenp = 0;
2432 return 0;
2433 }
2434
2435 i = (unsigned long *) data;
2436 min = (unsigned long *) table->extra1;
2437 max = (unsigned long *) table->extra2;
2438 vleft = table->maxlen / sizeof(unsigned long);
2439 left = *lenp;
2440
2441 if (write) {
2442 if (*ppos) {
2443 switch (sysctl_writes_strict) {
2444 case SYSCTL_WRITES_STRICT:
2445 goto out;
2446 case SYSCTL_WRITES_WARN:
2447 warn_sysctl_write(table);
2448 break;
2449 default:
2450 break;
2451 }
2452 }
2453
2454 if (left > PAGE_SIZE - 1)
2455 left = PAGE_SIZE - 1;
2456 p = kbuf = memdup_user_nul(buffer, left);
2457 if (IS_ERR(kbuf))
2458 return PTR_ERR(kbuf);
2459 }
2460
2461 for (; left && vleft--; i++, first = 0) {
2462 unsigned long val;
2463
2464 if (write) {
2465 bool neg;
2466
2467 left -= proc_skip_spaces(&p);
2468
2469 err = proc_get_long(&p, &left, &val, &neg,
2470 proc_wspace_sep,
2471 sizeof(proc_wspace_sep), NULL);
2472 if (err)
2473 break;
2474 if (neg)
2475 continue;
2476 if ((min && val < *min) || (max && val > *max))
2477 continue;
2478 *i = val;
2479 } else {
2480 val = convdiv * (*i) / convmul;
2481 if (!first) {
2482 err = proc_put_char(&buffer, &left, '\t');
2483 if (err)
2484 break;
2485 }
2486 err = proc_put_long(&buffer, &left, val, false);
2487 if (err)
2488 break;
2489 }
2490 }
2491
2492 if (!write && !first && left && !err)
2493 err = proc_put_char(&buffer, &left, '\n');
2494 if (write && !err)
2495 left -= proc_skip_spaces(&p);
2496 if (write) {
2497 kfree(kbuf);
2498 if (first)
2499 return err ? : -EINVAL;
2500 }
2501 *lenp -= left;
2502 out:
2503 *ppos += *lenp;
2504 return err;
2505 }
2506
2507 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
2508 void __user *buffer,
2509 size_t *lenp, loff_t *ppos,
2510 unsigned long convmul,
2511 unsigned long convdiv)
2512 {
2513 return __do_proc_doulongvec_minmax(table->data, table, write,
2514 buffer, lenp, ppos, convmul, convdiv);
2515 }
2516
2517 /**
2518 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2519 * @table: the sysctl table
2520 * @write: %TRUE if this is a write to the sysctl file
2521 * @buffer: the user buffer
2522 * @lenp: the size of the user buffer
2523 * @ppos: file position
2524 *
2525 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2526 * values from/to the user buffer, treated as an ASCII string.
2527 *
2528 * This routine will ensure the values are within the range specified by
2529 * table->extra1 (min) and table->extra2 (max).
2530 *
2531 * Returns 0 on success.
2532 */
2533 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2534 void __user *buffer, size_t *lenp, loff_t *ppos)
2535 {
2536 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);
2537 }
2538
2539 /**
2540 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2541 * @table: the sysctl table
2542 * @write: %TRUE if this is a write to the sysctl file
2543 * @buffer: the user buffer
2544 * @lenp: the size of the user buffer
2545 * @ppos: file position
2546 *
2547 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2548 * values from/to the user buffer, treated as an ASCII string. The values
2549 * are treated as milliseconds, and converted to jiffies when they are stored.
2550 *
2551 * This routine will ensure the values are within the range specified by
2552 * table->extra1 (min) and table->extra2 (max).
2553 *
2554 * Returns 0 on success.
2555 */
2556 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2557 void __user *buffer,
2558 size_t *lenp, loff_t *ppos)
2559 {
2560 return do_proc_doulongvec_minmax(table, write, buffer,
2561 lenp, ppos, HZ, 1000l);
2562 }
2563
2564
2565 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp,
2566 int *valp,
2567 int write, void *data)
2568 {
2569 if (write) {
2570 if (*lvalp > LONG_MAX / HZ)
2571 return 1;
2572 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
2573 } else {
2574 int val = *valp;
2575 unsigned long lval;
2576 if (val < 0) {
2577 *negp = true;
2578 lval = -(unsigned long)val;
2579 } else {
2580 *negp = false;
2581 lval = (unsigned long)val;
2582 }
2583 *lvalp = lval / HZ;
2584 }
2585 return 0;
2586 }
2587
2588 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp,
2589 int *valp,
2590 int write, void *data)
2591 {
2592 if (write) {
2593 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
2594 return 1;
2595 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
2596 } else {
2597 int val = *valp;
2598 unsigned long lval;
2599 if (val < 0) {
2600 *negp = true;
2601 lval = -(unsigned long)val;
2602 } else {
2603 *negp = false;
2604 lval = (unsigned long)val;
2605 }
2606 *lvalp = jiffies_to_clock_t(lval);
2607 }
2608 return 0;
2609 }
2610
2611 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp,
2612 int *valp,
2613 int write, void *data)
2614 {
2615 if (write) {
2616 unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
2617
2618 if (jif > INT_MAX)
2619 return 1;
2620 *valp = (int)jif;
2621 } else {
2622 int val = *valp;
2623 unsigned long lval;
2624 if (val < 0) {
2625 *negp = true;
2626 lval = -(unsigned long)val;
2627 } else {
2628 *negp = false;
2629 lval = (unsigned long)val;
2630 }
2631 *lvalp = jiffies_to_msecs(lval);
2632 }
2633 return 0;
2634 }
2635
2636 /**
2637 * proc_dointvec_jiffies - read a vector of integers as seconds
2638 * @table: the sysctl table
2639 * @write: %TRUE if this is a write to the sysctl file
2640 * @buffer: the user buffer
2641 * @lenp: the size of the user buffer
2642 * @ppos: file position
2643 *
2644 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2645 * values from/to the user buffer, treated as an ASCII string.
2646 * The values read are assumed to be in seconds, and are converted into
2647 * jiffies.
2648 *
2649 * Returns 0 on success.
2650 */
2651 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2652 void __user *buffer, size_t *lenp, loff_t *ppos)
2653 {
2654 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2655 do_proc_dointvec_jiffies_conv,NULL);
2656 }
2657
2658 /**
2659 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2660 * @table: the sysctl table
2661 * @write: %TRUE if this is a write to the sysctl file
2662 * @buffer: the user buffer
2663 * @lenp: the size of the user buffer
2664 * @ppos: pointer to the file position
2665 *
2666 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2667 * values from/to the user buffer, treated as an ASCII string.
2668 * The values read are assumed to be in 1/USER_HZ seconds, and
2669 * are converted into jiffies.
2670 *
2671 * Returns 0 on success.
2672 */
2673 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2674 void __user *buffer, size_t *lenp, loff_t *ppos)
2675 {
2676 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2677 do_proc_dointvec_userhz_jiffies_conv,NULL);
2678 }
2679
2680 /**
2681 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2682 * @table: the sysctl table
2683 * @write: %TRUE if this is a write to the sysctl file
2684 * @buffer: the user buffer
2685 * @lenp: the size of the user buffer
2686 * @ppos: file position
2687 * @ppos: the current position in the file
2688 *
2689 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2690 * values from/to the user buffer, treated as an ASCII string.
2691 * The values read are assumed to be in 1/1000 seconds, and
2692 * are converted into jiffies.
2693 *
2694 * Returns 0 on success.
2695 */
2696 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2697 void __user *buffer, size_t *lenp, loff_t *ppos)
2698 {
2699 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2700 do_proc_dointvec_ms_jiffies_conv, NULL);
2701 }
2702
2703 static int proc_do_cad_pid(struct ctl_table *table, int write,
2704 void __user *buffer, size_t *lenp, loff_t *ppos)
2705 {
2706 struct pid *new_pid;
2707 pid_t tmp;
2708 int r;
2709
2710 tmp = pid_vnr(cad_pid);
2711
2712 r = __do_proc_dointvec(&tmp, table, write, buffer,
2713 lenp, ppos, NULL, NULL);
2714 if (r || !write)
2715 return r;
2716
2717 new_pid = find_get_pid(tmp);
2718 if (!new_pid)
2719 return -ESRCH;
2720
2721 put_pid(xchg(&cad_pid, new_pid));
2722 return 0;
2723 }
2724
2725 /**
2726 * proc_do_large_bitmap - read/write from/to a large bitmap
2727 * @table: the sysctl table
2728 * @write: %TRUE if this is a write to the sysctl file
2729 * @buffer: the user buffer
2730 * @lenp: the size of the user buffer
2731 * @ppos: file position
2732 *
2733 * The bitmap is stored at table->data and the bitmap length (in bits)
2734 * in table->maxlen.
2735 *
2736 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
2737 * large bitmaps may be represented in a compact manner. Writing into
2738 * the file will clear the bitmap then update it with the given input.
2739 *
2740 * Returns 0 on success.
2741 */
2742 int proc_do_large_bitmap(struct ctl_table *table, int write,
2743 void __user *buffer, size_t *lenp, loff_t *ppos)
2744 {
2745 int err = 0;
2746 bool first = 1;
2747 size_t left = *lenp;
2748 unsigned long bitmap_len = table->maxlen;
2749 unsigned long *bitmap = *(unsigned long **) table->data;
2750 unsigned long *tmp_bitmap = NULL;
2751 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c;
2752
2753 if (!bitmap || !bitmap_len || !left || (*ppos && !write)) {
2754 *lenp = 0;
2755 return 0;
2756 }
2757
2758 if (write) {
2759 char *kbuf, *p;
2760
2761 if (left > PAGE_SIZE - 1)
2762 left = PAGE_SIZE - 1;
2763
2764 p = kbuf = memdup_user_nul(buffer, left);
2765 if (IS_ERR(kbuf))
2766 return PTR_ERR(kbuf);
2767
2768 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long),
2769 GFP_KERNEL);
2770 if (!tmp_bitmap) {
2771 kfree(kbuf);
2772 return -ENOMEM;
2773 }
2774 proc_skip_char(&p, &left, '\n');
2775 while (!err && left) {
2776 unsigned long val_a, val_b;
2777 bool neg;
2778
2779 err = proc_get_long(&p, &left, &val_a, &neg, tr_a,
2780 sizeof(tr_a), &c);
2781 if (err)
2782 break;
2783 if (val_a >= bitmap_len || neg) {
2784 err = -EINVAL;
2785 break;
2786 }
2787
2788 val_b = val_a;
2789 if (left) {
2790 p++;
2791 left--;
2792 }
2793
2794 if (c == '-') {
2795 err = proc_get_long(&p, &left, &val_b,
2796 &neg, tr_b, sizeof(tr_b),
2797 &c);
2798 if (err)
2799 break;
2800 if (val_b >= bitmap_len || neg ||
2801 val_a > val_b) {
2802 err = -EINVAL;
2803 break;
2804 }
2805 if (left) {
2806 p++;
2807 left--;
2808 }
2809 }
2810
2811 bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
2812 first = 0;
2813 proc_skip_char(&p, &left, '\n');
2814 }
2815 kfree(kbuf);
2816 } else {
2817 unsigned long bit_a, bit_b = 0;
2818
2819 while (left) {
2820 bit_a = find_next_bit(bitmap, bitmap_len, bit_b);
2821 if (bit_a >= bitmap_len)
2822 break;
2823 bit_b = find_next_zero_bit(bitmap, bitmap_len,
2824 bit_a + 1) - 1;
2825
2826 if (!first) {
2827 err = proc_put_char(&buffer, &left, ',');
2828 if (err)
2829 break;
2830 }
2831 err = proc_put_long(&buffer, &left, bit_a, false);
2832 if (err)
2833 break;
2834 if (bit_a != bit_b) {
2835 err = proc_put_char(&buffer, &left, '-');
2836 if (err)
2837 break;
2838 err = proc_put_long(&buffer, &left, bit_b, false);
2839 if (err)
2840 break;
2841 }
2842
2843 first = 0; bit_b++;
2844 }
2845 if (!err)
2846 err = proc_put_char(&buffer, &left, '\n');
2847 }
2848
2849 if (!err) {
2850 if (write) {
2851 if (*ppos)
2852 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
2853 else
2854 bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
2855 }
2856 kfree(tmp_bitmap);
2857 *lenp -= left;
2858 *ppos += *lenp;
2859 return 0;
2860 } else {
2861 kfree(tmp_bitmap);
2862 return err;
2863 }
2864 }
2865
2866 #else /* CONFIG_PROC_SYSCTL */
2867
2868 int proc_dostring(struct ctl_table *table, int write,
2869 void __user *buffer, size_t *lenp, loff_t *ppos)
2870 {
2871 return -ENOSYS;
2872 }
2873
2874 int proc_dointvec(struct ctl_table *table, int write,
2875 void __user *buffer, size_t *lenp, loff_t *ppos)
2876 {
2877 return -ENOSYS;
2878 }
2879
2880 int proc_douintvec(struct ctl_table *table, int write,
2881 void __user *buffer, size_t *lenp, loff_t *ppos)
2882 {
2883 return -ENOSYS;
2884 }
2885
2886 int proc_dointvec_minmax(struct ctl_table *table, int write,
2887 void __user *buffer, size_t *lenp, loff_t *ppos)
2888 {
2889 return -ENOSYS;
2890 }
2891
2892 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2893 void __user *buffer, size_t *lenp, loff_t *ppos)
2894 {
2895 return -ENOSYS;
2896 }
2897
2898 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2899 void __user *buffer, size_t *lenp, loff_t *ppos)
2900 {
2901 return -ENOSYS;
2902 }
2903
2904 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2905 void __user *buffer, size_t *lenp, loff_t *ppos)
2906 {
2907 return -ENOSYS;
2908 }
2909
2910 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2911 void __user *buffer, size_t *lenp, loff_t *ppos)
2912 {
2913 return -ENOSYS;
2914 }
2915
2916 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2917 void __user *buffer,
2918 size_t *lenp, loff_t *ppos)
2919 {
2920 return -ENOSYS;
2921 }
2922
2923
2924 #endif /* CONFIG_PROC_SYSCTL */
2925
2926 /*
2927 * No sense putting this after each symbol definition, twice,
2928 * exception granted :-)
2929 */
2930 EXPORT_SYMBOL(proc_dointvec);
2931 EXPORT_SYMBOL(proc_douintvec);
2932 EXPORT_SYMBOL(proc_dointvec_jiffies);
2933 EXPORT_SYMBOL(proc_dointvec_minmax);
2934 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
2935 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
2936 EXPORT_SYMBOL(proc_dostring);
2937 EXPORT_SYMBOL(proc_doulongvec_minmax);
2938 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
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