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Merge branch 'linus' into sched/core, to pick up fixes
[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 = "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_RT_MUTEXES
1081 {
1082 .procname = "max_lock_depth",
1083 .data = &max_lock_depth,
1084 .maxlen = sizeof(int),
1085 .mode = 0644,
1086 .proc_handler = proc_dointvec,
1087 },
1088 #endif
1089 {
1090 .procname = "poweroff_cmd",
1091 .data = &poweroff_cmd,
1092 .maxlen = POWEROFF_CMD_PATH_LEN,
1093 .mode = 0644,
1094 .proc_handler = proc_dostring,
1095 },
1096 #ifdef CONFIG_KEYS
1097 {
1098 .procname = "keys",
1099 .mode = 0555,
1100 .child = key_sysctls,
1101 },
1102 #endif
1103 #ifdef CONFIG_PERF_EVENTS
1104 /*
1105 * User-space scripts rely on the existence of this file
1106 * as a feature check for perf_events being enabled.
1107 *
1108 * So it's an ABI, do not remove!
1109 */
1110 {
1111 .procname = "perf_event_paranoid",
1112 .data = &sysctl_perf_event_paranoid,
1113 .maxlen = sizeof(sysctl_perf_event_paranoid),
1114 .mode = 0644,
1115 .proc_handler = proc_dointvec,
1116 },
1117 {
1118 .procname = "perf_event_mlock_kb",
1119 .data = &sysctl_perf_event_mlock,
1120 .maxlen = sizeof(sysctl_perf_event_mlock),
1121 .mode = 0644,
1122 .proc_handler = proc_dointvec,
1123 },
1124 {
1125 .procname = "perf_event_max_sample_rate",
1126 .data = &sysctl_perf_event_sample_rate,
1127 .maxlen = sizeof(sysctl_perf_event_sample_rate),
1128 .mode = 0644,
1129 .proc_handler = perf_proc_update_handler,
1130 .extra1 = &one,
1131 },
1132 {
1133 .procname = "perf_cpu_time_max_percent",
1134 .data = &sysctl_perf_cpu_time_max_percent,
1135 .maxlen = sizeof(sysctl_perf_cpu_time_max_percent),
1136 .mode = 0644,
1137 .proc_handler = perf_cpu_time_max_percent_handler,
1138 .extra1 = &zero,
1139 .extra2 = &one_hundred,
1140 },
1141 {
1142 .procname = "perf_event_max_stack",
1143 .data = &sysctl_perf_event_max_stack,
1144 .maxlen = sizeof(sysctl_perf_event_max_stack),
1145 .mode = 0644,
1146 .proc_handler = perf_event_max_stack_handler,
1147 .extra1 = &zero,
1148 .extra2 = &six_hundred_forty_kb,
1149 },
1150 {
1151 .procname = "perf_event_max_contexts_per_stack",
1152 .data = &sysctl_perf_event_max_contexts_per_stack,
1153 .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack),
1154 .mode = 0644,
1155 .proc_handler = perf_event_max_stack_handler,
1156 .extra1 = &zero,
1157 .extra2 = &one_thousand,
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 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU)
1200 {
1201 .procname = "panic_on_rcu_stall",
1202 .data = &sysctl_panic_on_rcu_stall,
1203 .maxlen = sizeof(sysctl_panic_on_rcu_stall),
1204 .mode = 0644,
1205 .proc_handler = proc_dointvec_minmax,
1206 .extra1 = &zero,
1207 .extra2 = &one,
1208 },
1209 #endif
1210 { }
1211 };
1212
1213 static struct ctl_table vm_table[] = {
1214 {
1215 .procname = "overcommit_memory",
1216 .data = &sysctl_overcommit_memory,
1217 .maxlen = sizeof(sysctl_overcommit_memory),
1218 .mode = 0644,
1219 .proc_handler = proc_dointvec_minmax,
1220 .extra1 = &zero,
1221 .extra2 = &two,
1222 },
1223 {
1224 .procname = "panic_on_oom",
1225 .data = &sysctl_panic_on_oom,
1226 .maxlen = sizeof(sysctl_panic_on_oom),
1227 .mode = 0644,
1228 .proc_handler = proc_dointvec_minmax,
1229 .extra1 = &zero,
1230 .extra2 = &two,
1231 },
1232 {
1233 .procname = "oom_kill_allocating_task",
1234 .data = &sysctl_oom_kill_allocating_task,
1235 .maxlen = sizeof(sysctl_oom_kill_allocating_task),
1236 .mode = 0644,
1237 .proc_handler = proc_dointvec,
1238 },
1239 {
1240 .procname = "oom_dump_tasks",
1241 .data = &sysctl_oom_dump_tasks,
1242 .maxlen = sizeof(sysctl_oom_dump_tasks),
1243 .mode = 0644,
1244 .proc_handler = proc_dointvec,
1245 },
1246 {
1247 .procname = "overcommit_ratio",
1248 .data = &sysctl_overcommit_ratio,
1249 .maxlen = sizeof(sysctl_overcommit_ratio),
1250 .mode = 0644,
1251 .proc_handler = overcommit_ratio_handler,
1252 },
1253 {
1254 .procname = "overcommit_kbytes",
1255 .data = &sysctl_overcommit_kbytes,
1256 .maxlen = sizeof(sysctl_overcommit_kbytes),
1257 .mode = 0644,
1258 .proc_handler = overcommit_kbytes_handler,
1259 },
1260 {
1261 .procname = "page-cluster",
1262 .data = &page_cluster,
1263 .maxlen = sizeof(int),
1264 .mode = 0644,
1265 .proc_handler = proc_dointvec_minmax,
1266 .extra1 = &zero,
1267 },
1268 {
1269 .procname = "dirty_background_ratio",
1270 .data = &dirty_background_ratio,
1271 .maxlen = sizeof(dirty_background_ratio),
1272 .mode = 0644,
1273 .proc_handler = dirty_background_ratio_handler,
1274 .extra1 = &zero,
1275 .extra2 = &one_hundred,
1276 },
1277 {
1278 .procname = "dirty_background_bytes",
1279 .data = &dirty_background_bytes,
1280 .maxlen = sizeof(dirty_background_bytes),
1281 .mode = 0644,
1282 .proc_handler = dirty_background_bytes_handler,
1283 .extra1 = &one_ul,
1284 },
1285 {
1286 .procname = "dirty_ratio",
1287 .data = &vm_dirty_ratio,
1288 .maxlen = sizeof(vm_dirty_ratio),
1289 .mode = 0644,
1290 .proc_handler = dirty_ratio_handler,
1291 .extra1 = &zero,
1292 .extra2 = &one_hundred,
1293 },
1294 {
1295 .procname = "dirty_bytes",
1296 .data = &vm_dirty_bytes,
1297 .maxlen = sizeof(vm_dirty_bytes),
1298 .mode = 0644,
1299 .proc_handler = dirty_bytes_handler,
1300 .extra1 = &dirty_bytes_min,
1301 },
1302 {
1303 .procname = "dirty_writeback_centisecs",
1304 .data = &dirty_writeback_interval,
1305 .maxlen = sizeof(dirty_writeback_interval),
1306 .mode = 0644,
1307 .proc_handler = dirty_writeback_centisecs_handler,
1308 },
1309 {
1310 .procname = "dirty_expire_centisecs",
1311 .data = &dirty_expire_interval,
1312 .maxlen = sizeof(dirty_expire_interval),
1313 .mode = 0644,
1314 .proc_handler = proc_dointvec_minmax,
1315 .extra1 = &zero,
1316 },
1317 {
1318 .procname = "dirtytime_expire_seconds",
1319 .data = &dirtytime_expire_interval,
1320 .maxlen = sizeof(dirty_expire_interval),
1321 .mode = 0644,
1322 .proc_handler = dirtytime_interval_handler,
1323 .extra1 = &zero,
1324 },
1325 {
1326 .procname = "nr_pdflush_threads",
1327 .mode = 0444 /* read-only */,
1328 .proc_handler = pdflush_proc_obsolete,
1329 },
1330 {
1331 .procname = "swappiness",
1332 .data = &vm_swappiness,
1333 .maxlen = sizeof(vm_swappiness),
1334 .mode = 0644,
1335 .proc_handler = proc_dointvec_minmax,
1336 .extra1 = &zero,
1337 .extra2 = &one_hundred,
1338 },
1339 #ifdef CONFIG_HUGETLB_PAGE
1340 {
1341 .procname = "nr_hugepages",
1342 .data = NULL,
1343 .maxlen = sizeof(unsigned long),
1344 .mode = 0644,
1345 .proc_handler = hugetlb_sysctl_handler,
1346 },
1347 #ifdef CONFIG_NUMA
1348 {
1349 .procname = "nr_hugepages_mempolicy",
1350 .data = NULL,
1351 .maxlen = sizeof(unsigned long),
1352 .mode = 0644,
1353 .proc_handler = &hugetlb_mempolicy_sysctl_handler,
1354 },
1355 #endif
1356 {
1357 .procname = "hugetlb_shm_group",
1358 .data = &sysctl_hugetlb_shm_group,
1359 .maxlen = sizeof(gid_t),
1360 .mode = 0644,
1361 .proc_handler = proc_dointvec,
1362 },
1363 {
1364 .procname = "hugepages_treat_as_movable",
1365 .data = &hugepages_treat_as_movable,
1366 .maxlen = sizeof(int),
1367 .mode = 0644,
1368 .proc_handler = proc_dointvec,
1369 },
1370 {
1371 .procname = "nr_overcommit_hugepages",
1372 .data = NULL,
1373 .maxlen = sizeof(unsigned long),
1374 .mode = 0644,
1375 .proc_handler = hugetlb_overcommit_handler,
1376 },
1377 #endif
1378 {
1379 .procname = "lowmem_reserve_ratio",
1380 .data = &sysctl_lowmem_reserve_ratio,
1381 .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
1382 .mode = 0644,
1383 .proc_handler = lowmem_reserve_ratio_sysctl_handler,
1384 },
1385 {
1386 .procname = "drop_caches",
1387 .data = &sysctl_drop_caches,
1388 .maxlen = sizeof(int),
1389 .mode = 0644,
1390 .proc_handler = drop_caches_sysctl_handler,
1391 .extra1 = &one,
1392 .extra2 = &four,
1393 },
1394 #ifdef CONFIG_COMPACTION
1395 {
1396 .procname = "compact_memory",
1397 .data = &sysctl_compact_memory,
1398 .maxlen = sizeof(int),
1399 .mode = 0200,
1400 .proc_handler = sysctl_compaction_handler,
1401 },
1402 {
1403 .procname = "extfrag_threshold",
1404 .data = &sysctl_extfrag_threshold,
1405 .maxlen = sizeof(int),
1406 .mode = 0644,
1407 .proc_handler = sysctl_extfrag_handler,
1408 .extra1 = &min_extfrag_threshold,
1409 .extra2 = &max_extfrag_threshold,
1410 },
1411 {
1412 .procname = "compact_unevictable_allowed",
1413 .data = &sysctl_compact_unevictable_allowed,
1414 .maxlen = sizeof(int),
1415 .mode = 0644,
1416 .proc_handler = proc_dointvec,
1417 .extra1 = &zero,
1418 .extra2 = &one,
1419 },
1420
1421 #endif /* CONFIG_COMPACTION */
1422 {
1423 .procname = "min_free_kbytes",
1424 .data = &min_free_kbytes,
1425 .maxlen = sizeof(min_free_kbytes),
1426 .mode = 0644,
1427 .proc_handler = min_free_kbytes_sysctl_handler,
1428 .extra1 = &zero,
1429 },
1430 {
1431 .procname = "watermark_scale_factor",
1432 .data = &watermark_scale_factor,
1433 .maxlen = sizeof(watermark_scale_factor),
1434 .mode = 0644,
1435 .proc_handler = watermark_scale_factor_sysctl_handler,
1436 .extra1 = &one,
1437 .extra2 = &one_thousand,
1438 },
1439 {
1440 .procname = "percpu_pagelist_fraction",
1441 .data = &percpu_pagelist_fraction,
1442 .maxlen = sizeof(percpu_pagelist_fraction),
1443 .mode = 0644,
1444 .proc_handler = percpu_pagelist_fraction_sysctl_handler,
1445 .extra1 = &zero,
1446 },
1447 #ifdef CONFIG_MMU
1448 {
1449 .procname = "max_map_count",
1450 .data = &sysctl_max_map_count,
1451 .maxlen = sizeof(sysctl_max_map_count),
1452 .mode = 0644,
1453 .proc_handler = proc_dointvec_minmax,
1454 .extra1 = &zero,
1455 },
1456 #else
1457 {
1458 .procname = "nr_trim_pages",
1459 .data = &sysctl_nr_trim_pages,
1460 .maxlen = sizeof(sysctl_nr_trim_pages),
1461 .mode = 0644,
1462 .proc_handler = proc_dointvec_minmax,
1463 .extra1 = &zero,
1464 },
1465 #endif
1466 {
1467 .procname = "laptop_mode",
1468 .data = &laptop_mode,
1469 .maxlen = sizeof(laptop_mode),
1470 .mode = 0644,
1471 .proc_handler = proc_dointvec_jiffies,
1472 },
1473 {
1474 .procname = "block_dump",
1475 .data = &block_dump,
1476 .maxlen = sizeof(block_dump),
1477 .mode = 0644,
1478 .proc_handler = proc_dointvec,
1479 .extra1 = &zero,
1480 },
1481 {
1482 .procname = "vfs_cache_pressure",
1483 .data = &sysctl_vfs_cache_pressure,
1484 .maxlen = sizeof(sysctl_vfs_cache_pressure),
1485 .mode = 0644,
1486 .proc_handler = proc_dointvec,
1487 .extra1 = &zero,
1488 },
1489 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1490 {
1491 .procname = "legacy_va_layout",
1492 .data = &sysctl_legacy_va_layout,
1493 .maxlen = sizeof(sysctl_legacy_va_layout),
1494 .mode = 0644,
1495 .proc_handler = proc_dointvec,
1496 .extra1 = &zero,
1497 },
1498 #endif
1499 #ifdef CONFIG_NUMA
1500 {
1501 .procname = "zone_reclaim_mode",
1502 .data = &node_reclaim_mode,
1503 .maxlen = sizeof(node_reclaim_mode),
1504 .mode = 0644,
1505 .proc_handler = proc_dointvec,
1506 .extra1 = &zero,
1507 },
1508 {
1509 .procname = "min_unmapped_ratio",
1510 .data = &sysctl_min_unmapped_ratio,
1511 .maxlen = sizeof(sysctl_min_unmapped_ratio),
1512 .mode = 0644,
1513 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
1514 .extra1 = &zero,
1515 .extra2 = &one_hundred,
1516 },
1517 {
1518 .procname = "min_slab_ratio",
1519 .data = &sysctl_min_slab_ratio,
1520 .maxlen = sizeof(sysctl_min_slab_ratio),
1521 .mode = 0644,
1522 .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
1523 .extra1 = &zero,
1524 .extra2 = &one_hundred,
1525 },
1526 #endif
1527 #ifdef CONFIG_SMP
1528 {
1529 .procname = "stat_interval",
1530 .data = &sysctl_stat_interval,
1531 .maxlen = sizeof(sysctl_stat_interval),
1532 .mode = 0644,
1533 .proc_handler = proc_dointvec_jiffies,
1534 },
1535 {
1536 .procname = "stat_refresh",
1537 .data = NULL,
1538 .maxlen = 0,
1539 .mode = 0600,
1540 .proc_handler = vmstat_refresh,
1541 },
1542 #endif
1543 #ifdef CONFIG_MMU
1544 {
1545 .procname = "mmap_min_addr",
1546 .data = &dac_mmap_min_addr,
1547 .maxlen = sizeof(unsigned long),
1548 .mode = 0644,
1549 .proc_handler = mmap_min_addr_handler,
1550 },
1551 #endif
1552 #ifdef CONFIG_NUMA
1553 {
1554 .procname = "numa_zonelist_order",
1555 .data = &numa_zonelist_order,
1556 .maxlen = NUMA_ZONELIST_ORDER_LEN,
1557 .mode = 0644,
1558 .proc_handler = numa_zonelist_order_handler,
1559 },
1560 #endif
1561 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1562 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1563 {
1564 .procname = "vdso_enabled",
1565 #ifdef CONFIG_X86_32
1566 .data = &vdso32_enabled,
1567 .maxlen = sizeof(vdso32_enabled),
1568 #else
1569 .data = &vdso_enabled,
1570 .maxlen = sizeof(vdso_enabled),
1571 #endif
1572 .mode = 0644,
1573 .proc_handler = proc_dointvec,
1574 .extra1 = &zero,
1575 },
1576 #endif
1577 #ifdef CONFIG_HIGHMEM
1578 {
1579 .procname = "highmem_is_dirtyable",
1580 .data = &vm_highmem_is_dirtyable,
1581 .maxlen = sizeof(vm_highmem_is_dirtyable),
1582 .mode = 0644,
1583 .proc_handler = proc_dointvec_minmax,
1584 .extra1 = &zero,
1585 .extra2 = &one,
1586 },
1587 #endif
1588 #ifdef CONFIG_MEMORY_FAILURE
1589 {
1590 .procname = "memory_failure_early_kill",
1591 .data = &sysctl_memory_failure_early_kill,
1592 .maxlen = sizeof(sysctl_memory_failure_early_kill),
1593 .mode = 0644,
1594 .proc_handler = proc_dointvec_minmax,
1595 .extra1 = &zero,
1596 .extra2 = &one,
1597 },
1598 {
1599 .procname = "memory_failure_recovery",
1600 .data = &sysctl_memory_failure_recovery,
1601 .maxlen = sizeof(sysctl_memory_failure_recovery),
1602 .mode = 0644,
1603 .proc_handler = proc_dointvec_minmax,
1604 .extra1 = &zero,
1605 .extra2 = &one,
1606 },
1607 #endif
1608 {
1609 .procname = "user_reserve_kbytes",
1610 .data = &sysctl_user_reserve_kbytes,
1611 .maxlen = sizeof(sysctl_user_reserve_kbytes),
1612 .mode = 0644,
1613 .proc_handler = proc_doulongvec_minmax,
1614 },
1615 {
1616 .procname = "admin_reserve_kbytes",
1617 .data = &sysctl_admin_reserve_kbytes,
1618 .maxlen = sizeof(sysctl_admin_reserve_kbytes),
1619 .mode = 0644,
1620 .proc_handler = proc_doulongvec_minmax,
1621 },
1622 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS
1623 {
1624 .procname = "mmap_rnd_bits",
1625 .data = &mmap_rnd_bits,
1626 .maxlen = sizeof(mmap_rnd_bits),
1627 .mode = 0600,
1628 .proc_handler = proc_dointvec_minmax,
1629 .extra1 = (void *)&mmap_rnd_bits_min,
1630 .extra2 = (void *)&mmap_rnd_bits_max,
1631 },
1632 #endif
1633 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
1634 {
1635 .procname = "mmap_rnd_compat_bits",
1636 .data = &mmap_rnd_compat_bits,
1637 .maxlen = sizeof(mmap_rnd_compat_bits),
1638 .mode = 0600,
1639 .proc_handler = proc_dointvec_minmax,
1640 .extra1 = (void *)&mmap_rnd_compat_bits_min,
1641 .extra2 = (void *)&mmap_rnd_compat_bits_max,
1642 },
1643 #endif
1644 { }
1645 };
1646
1647 static struct ctl_table fs_table[] = {
1648 {
1649 .procname = "inode-nr",
1650 .data = &inodes_stat,
1651 .maxlen = 2*sizeof(long),
1652 .mode = 0444,
1653 .proc_handler = proc_nr_inodes,
1654 },
1655 {
1656 .procname = "inode-state",
1657 .data = &inodes_stat,
1658 .maxlen = 7*sizeof(long),
1659 .mode = 0444,
1660 .proc_handler = proc_nr_inodes,
1661 },
1662 {
1663 .procname = "file-nr",
1664 .data = &files_stat,
1665 .maxlen = sizeof(files_stat),
1666 .mode = 0444,
1667 .proc_handler = proc_nr_files,
1668 },
1669 {
1670 .procname = "file-max",
1671 .data = &files_stat.max_files,
1672 .maxlen = sizeof(files_stat.max_files),
1673 .mode = 0644,
1674 .proc_handler = proc_doulongvec_minmax,
1675 },
1676 {
1677 .procname = "nr_open",
1678 .data = &sysctl_nr_open,
1679 .maxlen = sizeof(unsigned int),
1680 .mode = 0644,
1681 .proc_handler = proc_dointvec_minmax,
1682 .extra1 = &sysctl_nr_open_min,
1683 .extra2 = &sysctl_nr_open_max,
1684 },
1685 {
1686 .procname = "dentry-state",
1687 .data = &dentry_stat,
1688 .maxlen = 6*sizeof(long),
1689 .mode = 0444,
1690 .proc_handler = proc_nr_dentry,
1691 },
1692 {
1693 .procname = "overflowuid",
1694 .data = &fs_overflowuid,
1695 .maxlen = sizeof(int),
1696 .mode = 0644,
1697 .proc_handler = proc_dointvec_minmax,
1698 .extra1 = &minolduid,
1699 .extra2 = &maxolduid,
1700 },
1701 {
1702 .procname = "overflowgid",
1703 .data = &fs_overflowgid,
1704 .maxlen = sizeof(int),
1705 .mode = 0644,
1706 .proc_handler = proc_dointvec_minmax,
1707 .extra1 = &minolduid,
1708 .extra2 = &maxolduid,
1709 },
1710 #ifdef CONFIG_FILE_LOCKING
1711 {
1712 .procname = "leases-enable",
1713 .data = &leases_enable,
1714 .maxlen = sizeof(int),
1715 .mode = 0644,
1716 .proc_handler = proc_dointvec,
1717 },
1718 #endif
1719 #ifdef CONFIG_DNOTIFY
1720 {
1721 .procname = "dir-notify-enable",
1722 .data = &dir_notify_enable,
1723 .maxlen = sizeof(int),
1724 .mode = 0644,
1725 .proc_handler = proc_dointvec,
1726 },
1727 #endif
1728 #ifdef CONFIG_MMU
1729 #ifdef CONFIG_FILE_LOCKING
1730 {
1731 .procname = "lease-break-time",
1732 .data = &lease_break_time,
1733 .maxlen = sizeof(int),
1734 .mode = 0644,
1735 .proc_handler = proc_dointvec,
1736 },
1737 #endif
1738 #ifdef CONFIG_AIO
1739 {
1740 .procname = "aio-nr",
1741 .data = &aio_nr,
1742 .maxlen = sizeof(aio_nr),
1743 .mode = 0444,
1744 .proc_handler = proc_doulongvec_minmax,
1745 },
1746 {
1747 .procname = "aio-max-nr",
1748 .data = &aio_max_nr,
1749 .maxlen = sizeof(aio_max_nr),
1750 .mode = 0644,
1751 .proc_handler = proc_doulongvec_minmax,
1752 },
1753 #endif /* CONFIG_AIO */
1754 #ifdef CONFIG_INOTIFY_USER
1755 {
1756 .procname = "inotify",
1757 .mode = 0555,
1758 .child = inotify_table,
1759 },
1760 #endif
1761 #ifdef CONFIG_EPOLL
1762 {
1763 .procname = "epoll",
1764 .mode = 0555,
1765 .child = epoll_table,
1766 },
1767 #endif
1768 #endif
1769 {
1770 .procname = "protected_symlinks",
1771 .data = &sysctl_protected_symlinks,
1772 .maxlen = sizeof(int),
1773 .mode = 0600,
1774 .proc_handler = proc_dointvec_minmax,
1775 .extra1 = &zero,
1776 .extra2 = &one,
1777 },
1778 {
1779 .procname = "protected_hardlinks",
1780 .data = &sysctl_protected_hardlinks,
1781 .maxlen = sizeof(int),
1782 .mode = 0600,
1783 .proc_handler = proc_dointvec_minmax,
1784 .extra1 = &zero,
1785 .extra2 = &one,
1786 },
1787 {
1788 .procname = "suid_dumpable",
1789 .data = &suid_dumpable,
1790 .maxlen = sizeof(int),
1791 .mode = 0644,
1792 .proc_handler = proc_dointvec_minmax_coredump,
1793 .extra1 = &zero,
1794 .extra2 = &two,
1795 },
1796 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1797 {
1798 .procname = "binfmt_misc",
1799 .mode = 0555,
1800 .child = sysctl_mount_point,
1801 },
1802 #endif
1803 {
1804 .procname = "pipe-max-size",
1805 .data = &pipe_max_size,
1806 .maxlen = sizeof(int),
1807 .mode = 0644,
1808 .proc_handler = &pipe_proc_fn,
1809 .extra1 = &pipe_min_size,
1810 },
1811 {
1812 .procname = "pipe-user-pages-hard",
1813 .data = &pipe_user_pages_hard,
1814 .maxlen = sizeof(pipe_user_pages_hard),
1815 .mode = 0644,
1816 .proc_handler = proc_doulongvec_minmax,
1817 },
1818 {
1819 .procname = "pipe-user-pages-soft",
1820 .data = &pipe_user_pages_soft,
1821 .maxlen = sizeof(pipe_user_pages_soft),
1822 .mode = 0644,
1823 .proc_handler = proc_doulongvec_minmax,
1824 },
1825 {
1826 .procname = "mount-max",
1827 .data = &sysctl_mount_max,
1828 .maxlen = sizeof(unsigned int),
1829 .mode = 0644,
1830 .proc_handler = proc_dointvec_minmax,
1831 .extra1 = &one,
1832 },
1833 { }
1834 };
1835
1836 static struct ctl_table debug_table[] = {
1837 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
1838 {
1839 .procname = "exception-trace",
1840 .data = &show_unhandled_signals,
1841 .maxlen = sizeof(int),
1842 .mode = 0644,
1843 .proc_handler = proc_dointvec
1844 },
1845 #endif
1846 #if defined(CONFIG_OPTPROBES)
1847 {
1848 .procname = "kprobes-optimization",
1849 .data = &sysctl_kprobes_optimization,
1850 .maxlen = sizeof(int),
1851 .mode = 0644,
1852 .proc_handler = proc_kprobes_optimization_handler,
1853 .extra1 = &zero,
1854 .extra2 = &one,
1855 },
1856 #endif
1857 { }
1858 };
1859
1860 static struct ctl_table dev_table[] = {
1861 { }
1862 };
1863
1864 int __init sysctl_init(void)
1865 {
1866 struct ctl_table_header *hdr;
1867
1868 hdr = register_sysctl_table(sysctl_base_table);
1869 kmemleak_not_leak(hdr);
1870 return 0;
1871 }
1872
1873 #endif /* CONFIG_SYSCTL */
1874
1875 /*
1876 * /proc/sys support
1877 */
1878
1879 #ifdef CONFIG_PROC_SYSCTL
1880
1881 static int _proc_do_string(char *data, int maxlen, int write,
1882 char __user *buffer,
1883 size_t *lenp, loff_t *ppos)
1884 {
1885 size_t len;
1886 char __user *p;
1887 char c;
1888
1889 if (!data || !maxlen || !*lenp) {
1890 *lenp = 0;
1891 return 0;
1892 }
1893
1894 if (write) {
1895 if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) {
1896 /* Only continue writes not past the end of buffer. */
1897 len = strlen(data);
1898 if (len > maxlen - 1)
1899 len = maxlen - 1;
1900
1901 if (*ppos > len)
1902 return 0;
1903 len = *ppos;
1904 } else {
1905 /* Start writing from beginning of buffer. */
1906 len = 0;
1907 }
1908
1909 *ppos += *lenp;
1910 p = buffer;
1911 while ((p - buffer) < *lenp && len < maxlen - 1) {
1912 if (get_user(c, p++))
1913 return -EFAULT;
1914 if (c == 0 || c == '\n')
1915 break;
1916 data[len++] = c;
1917 }
1918 data[len] = 0;
1919 } else {
1920 len = strlen(data);
1921 if (len > maxlen)
1922 len = maxlen;
1923
1924 if (*ppos > len) {
1925 *lenp = 0;
1926 return 0;
1927 }
1928
1929 data += *ppos;
1930 len -= *ppos;
1931
1932 if (len > *lenp)
1933 len = *lenp;
1934 if (len)
1935 if (copy_to_user(buffer, data, len))
1936 return -EFAULT;
1937 if (len < *lenp) {
1938 if (put_user('\n', buffer + len))
1939 return -EFAULT;
1940 len++;
1941 }
1942 *lenp = len;
1943 *ppos += len;
1944 }
1945 return 0;
1946 }
1947
1948 static void warn_sysctl_write(struct ctl_table *table)
1949 {
1950 pr_warn_once("%s wrote to %s when file position was not 0!\n"
1951 "This will not be supported in the future. To silence this\n"
1952 "warning, set kernel.sysctl_writes_strict = -1\n",
1953 current->comm, table->procname);
1954 }
1955
1956 /**
1957 * proc_dostring - read a string sysctl
1958 * @table: the sysctl table
1959 * @write: %TRUE if this is a write to the sysctl file
1960 * @buffer: the user buffer
1961 * @lenp: the size of the user buffer
1962 * @ppos: file position
1963 *
1964 * Reads/writes a string from/to the user buffer. If the kernel
1965 * buffer provided is not large enough to hold the string, the
1966 * string is truncated. The copied string is %NULL-terminated.
1967 * If the string is being read by the user process, it is copied
1968 * and a newline '\n' is added. It is truncated if the buffer is
1969 * not large enough.
1970 *
1971 * Returns 0 on success.
1972 */
1973 int proc_dostring(struct ctl_table *table, int write,
1974 void __user *buffer, size_t *lenp, loff_t *ppos)
1975 {
1976 if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN)
1977 warn_sysctl_write(table);
1978
1979 return _proc_do_string((char *)(table->data), table->maxlen, write,
1980 (char __user *)buffer, lenp, ppos);
1981 }
1982
1983 static size_t proc_skip_spaces(char **buf)
1984 {
1985 size_t ret;
1986 char *tmp = skip_spaces(*buf);
1987 ret = tmp - *buf;
1988 *buf = tmp;
1989 return ret;
1990 }
1991
1992 static void proc_skip_char(char **buf, size_t *size, const char v)
1993 {
1994 while (*size) {
1995 if (**buf != v)
1996 break;
1997 (*size)--;
1998 (*buf)++;
1999 }
2000 }
2001
2002 #define TMPBUFLEN 22
2003 /**
2004 * proc_get_long - reads an ASCII formatted integer from a user buffer
2005 *
2006 * @buf: a kernel buffer
2007 * @size: size of the kernel buffer
2008 * @val: this is where the number will be stored
2009 * @neg: set to %TRUE if number is negative
2010 * @perm_tr: a vector which contains the allowed trailers
2011 * @perm_tr_len: size of the perm_tr vector
2012 * @tr: pointer to store the trailer character
2013 *
2014 * In case of success %0 is returned and @buf and @size are updated with
2015 * the amount of bytes read. If @tr is non-NULL and a trailing
2016 * character exists (size is non-zero after returning from this
2017 * function), @tr is updated with the trailing character.
2018 */
2019 static int proc_get_long(char **buf, size_t *size,
2020 unsigned long *val, bool *neg,
2021 const char *perm_tr, unsigned perm_tr_len, char *tr)
2022 {
2023 int len;
2024 char *p, tmp[TMPBUFLEN];
2025
2026 if (!*size)
2027 return -EINVAL;
2028
2029 len = *size;
2030 if (len > TMPBUFLEN - 1)
2031 len = TMPBUFLEN - 1;
2032
2033 memcpy(tmp, *buf, len);
2034
2035 tmp[len] = 0;
2036 p = tmp;
2037 if (*p == '-' && *size > 1) {
2038 *neg = true;
2039 p++;
2040 } else
2041 *neg = false;
2042 if (!isdigit(*p))
2043 return -EINVAL;
2044
2045 *val = simple_strtoul(p, &p, 0);
2046
2047 len = p - tmp;
2048
2049 /* We don't know if the next char is whitespace thus we may accept
2050 * invalid integers (e.g. 1234...a) or two integers instead of one
2051 * (e.g. 123...1). So lets not allow such large numbers. */
2052 if (len == TMPBUFLEN - 1)
2053 return -EINVAL;
2054
2055 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len))
2056 return -EINVAL;
2057
2058 if (tr && (len < *size))
2059 *tr = *p;
2060
2061 *buf += len;
2062 *size -= len;
2063
2064 return 0;
2065 }
2066
2067 /**
2068 * proc_put_long - converts an integer to a decimal ASCII formatted string
2069 *
2070 * @buf: the user buffer
2071 * @size: the size of the user buffer
2072 * @val: the integer to be converted
2073 * @neg: sign of the number, %TRUE for negative
2074 *
2075 * In case of success %0 is returned and @buf and @size are updated with
2076 * the amount of bytes written.
2077 */
2078 static int proc_put_long(void __user **buf, size_t *size, unsigned long val,
2079 bool neg)
2080 {
2081 int len;
2082 char tmp[TMPBUFLEN], *p = tmp;
2083
2084 sprintf(p, "%s%lu", neg ? "-" : "", val);
2085 len = strlen(tmp);
2086 if (len > *size)
2087 len = *size;
2088 if (copy_to_user(*buf, tmp, len))
2089 return -EFAULT;
2090 *size -= len;
2091 *buf += len;
2092 return 0;
2093 }
2094 #undef TMPBUFLEN
2095
2096 static int proc_put_char(void __user **buf, size_t *size, char c)
2097 {
2098 if (*size) {
2099 char __user **buffer = (char __user **)buf;
2100 if (put_user(c, *buffer))
2101 return -EFAULT;
2102 (*size)--, (*buffer)++;
2103 *buf = *buffer;
2104 }
2105 return 0;
2106 }
2107
2108 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
2109 int *valp,
2110 int write, void *data)
2111 {
2112 if (write) {
2113 if (*negp) {
2114 if (*lvalp > (unsigned long) INT_MAX + 1)
2115 return -EINVAL;
2116 *valp = -*lvalp;
2117 } else {
2118 if (*lvalp > (unsigned long) INT_MAX)
2119 return -EINVAL;
2120 *valp = *lvalp;
2121 }
2122 } else {
2123 int val = *valp;
2124 if (val < 0) {
2125 *negp = true;
2126 *lvalp = -(unsigned long)val;
2127 } else {
2128 *negp = false;
2129 *lvalp = (unsigned long)val;
2130 }
2131 }
2132 return 0;
2133 }
2134
2135 static int do_proc_douintvec_conv(bool *negp, unsigned long *lvalp,
2136 int *valp,
2137 int write, void *data)
2138 {
2139 if (write) {
2140 if (*negp)
2141 return -EINVAL;
2142 *valp = *lvalp;
2143 } else {
2144 unsigned int val = *valp;
2145 *lvalp = (unsigned long)val;
2146 }
2147 return 0;
2148 }
2149
2150 static const char proc_wspace_sep[] = { ' ', '\t', '\n' };
2151
2152 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
2153 int write, void __user *buffer,
2154 size_t *lenp, loff_t *ppos,
2155 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2156 int write, void *data),
2157 void *data)
2158 {
2159 int *i, vleft, first = 1, err = 0;
2160 size_t left;
2161 char *kbuf = NULL, *p;
2162
2163 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {
2164 *lenp = 0;
2165 return 0;
2166 }
2167
2168 i = (int *) tbl_data;
2169 vleft = table->maxlen / sizeof(*i);
2170 left = *lenp;
2171
2172 if (!conv)
2173 conv = do_proc_dointvec_conv;
2174
2175 if (write) {
2176 if (*ppos) {
2177 switch (sysctl_writes_strict) {
2178 case SYSCTL_WRITES_STRICT:
2179 goto out;
2180 case SYSCTL_WRITES_WARN:
2181 warn_sysctl_write(table);
2182 break;
2183 default:
2184 break;
2185 }
2186 }
2187
2188 if (left > PAGE_SIZE - 1)
2189 left = PAGE_SIZE - 1;
2190 p = kbuf = memdup_user_nul(buffer, left);
2191 if (IS_ERR(kbuf))
2192 return PTR_ERR(kbuf);
2193 }
2194
2195 for (; left && vleft--; i++, first=0) {
2196 unsigned long lval;
2197 bool neg;
2198
2199 if (write) {
2200 left -= proc_skip_spaces(&p);
2201
2202 if (!left)
2203 break;
2204 err = proc_get_long(&p, &left, &lval, &neg,
2205 proc_wspace_sep,
2206 sizeof(proc_wspace_sep), NULL);
2207 if (err)
2208 break;
2209 if (conv(&neg, &lval, i, 1, data)) {
2210 err = -EINVAL;
2211 break;
2212 }
2213 } else {
2214 if (conv(&neg, &lval, i, 0, data)) {
2215 err = -EINVAL;
2216 break;
2217 }
2218 if (!first)
2219 err = proc_put_char(&buffer, &left, '\t');
2220 if (err)
2221 break;
2222 err = proc_put_long(&buffer, &left, lval, neg);
2223 if (err)
2224 break;
2225 }
2226 }
2227
2228 if (!write && !first && left && !err)
2229 err = proc_put_char(&buffer, &left, '\n');
2230 if (write && !err && left)
2231 left -= proc_skip_spaces(&p);
2232 if (write) {
2233 kfree(kbuf);
2234 if (first)
2235 return err ? : -EINVAL;
2236 }
2237 *lenp -= left;
2238 out:
2239 *ppos += *lenp;
2240 return err;
2241 }
2242
2243 static int do_proc_dointvec(struct ctl_table *table, int write,
2244 void __user *buffer, size_t *lenp, loff_t *ppos,
2245 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2246 int write, void *data),
2247 void *data)
2248 {
2249 return __do_proc_dointvec(table->data, table, write,
2250 buffer, lenp, ppos, conv, data);
2251 }
2252
2253 /**
2254 * proc_dointvec - read a vector of integers
2255 * @table: the sysctl table
2256 * @write: %TRUE if this is a write to the sysctl file
2257 * @buffer: the user buffer
2258 * @lenp: the size of the user buffer
2259 * @ppos: file position
2260 *
2261 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2262 * values from/to the user buffer, treated as an ASCII string.
2263 *
2264 * Returns 0 on success.
2265 */
2266 int proc_dointvec(struct ctl_table *table, int write,
2267 void __user *buffer, size_t *lenp, loff_t *ppos)
2268 {
2269 return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL);
2270 }
2271
2272 /**
2273 * proc_douintvec - read a vector of unsigned integers
2274 * @table: the sysctl table
2275 * @write: %TRUE if this is a write to the sysctl file
2276 * @buffer: the user buffer
2277 * @lenp: the size of the user buffer
2278 * @ppos: file position
2279 *
2280 * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer
2281 * values from/to the user buffer, treated as an ASCII string.
2282 *
2283 * Returns 0 on success.
2284 */
2285 int proc_douintvec(struct ctl_table *table, int write,
2286 void __user *buffer, size_t *lenp, loff_t *ppos)
2287 {
2288 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2289 do_proc_douintvec_conv, NULL);
2290 }
2291
2292 /*
2293 * Taint values can only be increased
2294 * This means we can safely use a temporary.
2295 */
2296 static int proc_taint(struct ctl_table *table, int write,
2297 void __user *buffer, size_t *lenp, loff_t *ppos)
2298 {
2299 struct ctl_table t;
2300 unsigned long tmptaint = get_taint();
2301 int err;
2302
2303 if (write && !capable(CAP_SYS_ADMIN))
2304 return -EPERM;
2305
2306 t = *table;
2307 t.data = &tmptaint;
2308 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);
2309 if (err < 0)
2310 return err;
2311
2312 if (write) {
2313 /*
2314 * Poor man's atomic or. Not worth adding a primitive
2315 * to everyone's atomic.h for this
2316 */
2317 int i;
2318 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
2319 if ((tmptaint >> i) & 1)
2320 add_taint(i, LOCKDEP_STILL_OK);
2321 }
2322 }
2323
2324 return err;
2325 }
2326
2327 #ifdef CONFIG_PRINTK
2328 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
2329 void __user *buffer, size_t *lenp, loff_t *ppos)
2330 {
2331 if (write && !capable(CAP_SYS_ADMIN))
2332 return -EPERM;
2333
2334 return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
2335 }
2336 #endif
2337
2338 struct do_proc_dointvec_minmax_conv_param {
2339 int *min;
2340 int *max;
2341 };
2342
2343 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp,
2344 int *valp,
2345 int write, void *data)
2346 {
2347 struct do_proc_dointvec_minmax_conv_param *param = data;
2348 if (write) {
2349 int val = *negp ? -*lvalp : *lvalp;
2350 if ((param->min && *param->min > val) ||
2351 (param->max && *param->max < val))
2352 return -EINVAL;
2353 *valp = val;
2354 } else {
2355 int val = *valp;
2356 if (val < 0) {
2357 *negp = true;
2358 *lvalp = -(unsigned long)val;
2359 } else {
2360 *negp = false;
2361 *lvalp = (unsigned long)val;
2362 }
2363 }
2364 return 0;
2365 }
2366
2367 /**
2368 * proc_dointvec_minmax - read a vector of integers with min/max values
2369 * @table: the sysctl table
2370 * @write: %TRUE if this is a write to the sysctl file
2371 * @buffer: the user buffer
2372 * @lenp: the size of the user buffer
2373 * @ppos: file position
2374 *
2375 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2376 * values from/to the user buffer, treated as an ASCII string.
2377 *
2378 * This routine will ensure the values are within the range specified by
2379 * table->extra1 (min) and table->extra2 (max).
2380 *
2381 * Returns 0 on success.
2382 */
2383 int proc_dointvec_minmax(struct ctl_table *table, int write,
2384 void __user *buffer, size_t *lenp, loff_t *ppos)
2385 {
2386 struct do_proc_dointvec_minmax_conv_param param = {
2387 .min = (int *) table->extra1,
2388 .max = (int *) table->extra2,
2389 };
2390 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2391 do_proc_dointvec_minmax_conv, &param);
2392 }
2393
2394 static void validate_coredump_safety(void)
2395 {
2396 #ifdef CONFIG_COREDUMP
2397 if (suid_dumpable == SUID_DUMP_ROOT &&
2398 core_pattern[0] != '/' && core_pattern[0] != '|') {
2399 printk(KERN_WARNING "Unsafe core_pattern used with "\
2400 "suid_dumpable=2. Pipe handler or fully qualified "\
2401 "core dump path required.\n");
2402 }
2403 #endif
2404 }
2405
2406 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
2407 void __user *buffer, size_t *lenp, loff_t *ppos)
2408 {
2409 int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
2410 if (!error)
2411 validate_coredump_safety();
2412 return error;
2413 }
2414
2415 #ifdef CONFIG_COREDUMP
2416 static int proc_dostring_coredump(struct ctl_table *table, int write,
2417 void __user *buffer, size_t *lenp, loff_t *ppos)
2418 {
2419 int error = proc_dostring(table, write, buffer, lenp, ppos);
2420 if (!error)
2421 validate_coredump_safety();
2422 return error;
2423 }
2424 #endif
2425
2426 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
2427 void __user *buffer,
2428 size_t *lenp, loff_t *ppos,
2429 unsigned long convmul,
2430 unsigned long convdiv)
2431 {
2432 unsigned long *i, *min, *max;
2433 int vleft, first = 1, err = 0;
2434 size_t left;
2435 char *kbuf = NULL, *p;
2436
2437 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {
2438 *lenp = 0;
2439 return 0;
2440 }
2441
2442 i = (unsigned long *) data;
2443 min = (unsigned long *) table->extra1;
2444 max = (unsigned long *) table->extra2;
2445 vleft = table->maxlen / sizeof(unsigned long);
2446 left = *lenp;
2447
2448 if (write) {
2449 if (*ppos) {
2450 switch (sysctl_writes_strict) {
2451 case SYSCTL_WRITES_STRICT:
2452 goto out;
2453 case SYSCTL_WRITES_WARN:
2454 warn_sysctl_write(table);
2455 break;
2456 default:
2457 break;
2458 }
2459 }
2460
2461 if (left > PAGE_SIZE - 1)
2462 left = PAGE_SIZE - 1;
2463 p = kbuf = memdup_user_nul(buffer, left);
2464 if (IS_ERR(kbuf))
2465 return PTR_ERR(kbuf);
2466 }
2467
2468 for (; left && vleft--; i++, first = 0) {
2469 unsigned long val;
2470
2471 if (write) {
2472 bool neg;
2473
2474 left -= proc_skip_spaces(&p);
2475
2476 err = proc_get_long(&p, &left, &val, &neg,
2477 proc_wspace_sep,
2478 sizeof(proc_wspace_sep), NULL);
2479 if (err)
2480 break;
2481 if (neg)
2482 continue;
2483 if ((min && val < *min) || (max && val > *max))
2484 continue;
2485 *i = val;
2486 } else {
2487 val = convdiv * (*i) / convmul;
2488 if (!first) {
2489 err = proc_put_char(&buffer, &left, '\t');
2490 if (err)
2491 break;
2492 }
2493 err = proc_put_long(&buffer, &left, val, false);
2494 if (err)
2495 break;
2496 }
2497 }
2498
2499 if (!write && !first && left && !err)
2500 err = proc_put_char(&buffer, &left, '\n');
2501 if (write && !err)
2502 left -= proc_skip_spaces(&p);
2503 if (write) {
2504 kfree(kbuf);
2505 if (first)
2506 return err ? : -EINVAL;
2507 }
2508 *lenp -= left;
2509 out:
2510 *ppos += *lenp;
2511 return err;
2512 }
2513
2514 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
2515 void __user *buffer,
2516 size_t *lenp, loff_t *ppos,
2517 unsigned long convmul,
2518 unsigned long convdiv)
2519 {
2520 return __do_proc_doulongvec_minmax(table->data, table, write,
2521 buffer, lenp, ppos, convmul, convdiv);
2522 }
2523
2524 /**
2525 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2526 * @table: the sysctl table
2527 * @write: %TRUE if this is a write to the sysctl file
2528 * @buffer: the user buffer
2529 * @lenp: the size of the user buffer
2530 * @ppos: file position
2531 *
2532 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2533 * values from/to the user buffer, treated as an ASCII string.
2534 *
2535 * This routine will ensure the values are within the range specified by
2536 * table->extra1 (min) and table->extra2 (max).
2537 *
2538 * Returns 0 on success.
2539 */
2540 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2541 void __user *buffer, size_t *lenp, loff_t *ppos)
2542 {
2543 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);
2544 }
2545
2546 /**
2547 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2548 * @table: the sysctl table
2549 * @write: %TRUE if this is a write to the sysctl file
2550 * @buffer: the user buffer
2551 * @lenp: the size of the user buffer
2552 * @ppos: file position
2553 *
2554 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2555 * values from/to the user buffer, treated as an ASCII string. The values
2556 * are treated as milliseconds, and converted to jiffies when they are stored.
2557 *
2558 * This routine will ensure the values are within the range specified by
2559 * table->extra1 (min) and table->extra2 (max).
2560 *
2561 * Returns 0 on success.
2562 */
2563 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2564 void __user *buffer,
2565 size_t *lenp, loff_t *ppos)
2566 {
2567 return do_proc_doulongvec_minmax(table, write, buffer,
2568 lenp, ppos, HZ, 1000l);
2569 }
2570
2571
2572 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp,
2573 int *valp,
2574 int write, void *data)
2575 {
2576 if (write) {
2577 if (*lvalp > LONG_MAX / HZ)
2578 return 1;
2579 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
2580 } else {
2581 int val = *valp;
2582 unsigned long lval;
2583 if (val < 0) {
2584 *negp = true;
2585 lval = -(unsigned long)val;
2586 } else {
2587 *negp = false;
2588 lval = (unsigned long)val;
2589 }
2590 *lvalp = lval / HZ;
2591 }
2592 return 0;
2593 }
2594
2595 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp,
2596 int *valp,
2597 int write, void *data)
2598 {
2599 if (write) {
2600 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
2601 return 1;
2602 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
2603 } else {
2604 int val = *valp;
2605 unsigned long lval;
2606 if (val < 0) {
2607 *negp = true;
2608 lval = -(unsigned long)val;
2609 } else {
2610 *negp = false;
2611 lval = (unsigned long)val;
2612 }
2613 *lvalp = jiffies_to_clock_t(lval);
2614 }
2615 return 0;
2616 }
2617
2618 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp,
2619 int *valp,
2620 int write, void *data)
2621 {
2622 if (write) {
2623 unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
2624
2625 if (jif > INT_MAX)
2626 return 1;
2627 *valp = (int)jif;
2628 } else {
2629 int val = *valp;
2630 unsigned long lval;
2631 if (val < 0) {
2632 *negp = true;
2633 lval = -(unsigned long)val;
2634 } else {
2635 *negp = false;
2636 lval = (unsigned long)val;
2637 }
2638 *lvalp = jiffies_to_msecs(lval);
2639 }
2640 return 0;
2641 }
2642
2643 /**
2644 * proc_dointvec_jiffies - read a vector of integers as seconds
2645 * @table: the sysctl table
2646 * @write: %TRUE if this is a write to the sysctl file
2647 * @buffer: the user buffer
2648 * @lenp: the size of the user buffer
2649 * @ppos: file position
2650 *
2651 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2652 * values from/to the user buffer, treated as an ASCII string.
2653 * The values read are assumed to be in seconds, and are converted into
2654 * jiffies.
2655 *
2656 * Returns 0 on success.
2657 */
2658 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2659 void __user *buffer, size_t *lenp, loff_t *ppos)
2660 {
2661 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2662 do_proc_dointvec_jiffies_conv,NULL);
2663 }
2664
2665 /**
2666 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2667 * @table: the sysctl table
2668 * @write: %TRUE if this is a write to the sysctl file
2669 * @buffer: the user buffer
2670 * @lenp: the size of the user buffer
2671 * @ppos: pointer to the file position
2672 *
2673 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2674 * values from/to the user buffer, treated as an ASCII string.
2675 * The values read are assumed to be in 1/USER_HZ seconds, and
2676 * are converted into jiffies.
2677 *
2678 * Returns 0 on success.
2679 */
2680 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2681 void __user *buffer, size_t *lenp, loff_t *ppos)
2682 {
2683 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2684 do_proc_dointvec_userhz_jiffies_conv,NULL);
2685 }
2686
2687 /**
2688 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2689 * @table: the sysctl table
2690 * @write: %TRUE if this is a write to the sysctl file
2691 * @buffer: the user buffer
2692 * @lenp: the size of the user buffer
2693 * @ppos: file position
2694 * @ppos: the current position in the file
2695 *
2696 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2697 * values from/to the user buffer, treated as an ASCII string.
2698 * The values read are assumed to be in 1/1000 seconds, and
2699 * are converted into jiffies.
2700 *
2701 * Returns 0 on success.
2702 */
2703 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2704 void __user *buffer, size_t *lenp, loff_t *ppos)
2705 {
2706 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2707 do_proc_dointvec_ms_jiffies_conv, NULL);
2708 }
2709
2710 static int proc_do_cad_pid(struct ctl_table *table, int write,
2711 void __user *buffer, size_t *lenp, loff_t *ppos)
2712 {
2713 struct pid *new_pid;
2714 pid_t tmp;
2715 int r;
2716
2717 tmp = pid_vnr(cad_pid);
2718
2719 r = __do_proc_dointvec(&tmp, table, write, buffer,
2720 lenp, ppos, NULL, NULL);
2721 if (r || !write)
2722 return r;
2723
2724 new_pid = find_get_pid(tmp);
2725 if (!new_pid)
2726 return -ESRCH;
2727
2728 put_pid(xchg(&cad_pid, new_pid));
2729 return 0;
2730 }
2731
2732 /**
2733 * proc_do_large_bitmap - read/write from/to a large bitmap
2734 * @table: the sysctl table
2735 * @write: %TRUE if this is a write to the sysctl file
2736 * @buffer: the user buffer
2737 * @lenp: the size of the user buffer
2738 * @ppos: file position
2739 *
2740 * The bitmap is stored at table->data and the bitmap length (in bits)
2741 * in table->maxlen.
2742 *
2743 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
2744 * large bitmaps may be represented in a compact manner. Writing into
2745 * the file will clear the bitmap then update it with the given input.
2746 *
2747 * Returns 0 on success.
2748 */
2749 int proc_do_large_bitmap(struct ctl_table *table, int write,
2750 void __user *buffer, size_t *lenp, loff_t *ppos)
2751 {
2752 int err = 0;
2753 bool first = 1;
2754 size_t left = *lenp;
2755 unsigned long bitmap_len = table->maxlen;
2756 unsigned long *bitmap = *(unsigned long **) table->data;
2757 unsigned long *tmp_bitmap = NULL;
2758 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c;
2759
2760 if (!bitmap || !bitmap_len || !left || (*ppos && !write)) {
2761 *lenp = 0;
2762 return 0;
2763 }
2764
2765 if (write) {
2766 char *kbuf, *p;
2767
2768 if (left > PAGE_SIZE - 1)
2769 left = PAGE_SIZE - 1;
2770
2771 p = kbuf = memdup_user_nul(buffer, left);
2772 if (IS_ERR(kbuf))
2773 return PTR_ERR(kbuf);
2774
2775 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long),
2776 GFP_KERNEL);
2777 if (!tmp_bitmap) {
2778 kfree(kbuf);
2779 return -ENOMEM;
2780 }
2781 proc_skip_char(&p, &left, '\n');
2782 while (!err && left) {
2783 unsigned long val_a, val_b;
2784 bool neg;
2785
2786 err = proc_get_long(&p, &left, &val_a, &neg, tr_a,
2787 sizeof(tr_a), &c);
2788 if (err)
2789 break;
2790 if (val_a >= bitmap_len || neg) {
2791 err = -EINVAL;
2792 break;
2793 }
2794
2795 val_b = val_a;
2796 if (left) {
2797 p++;
2798 left--;
2799 }
2800
2801 if (c == '-') {
2802 err = proc_get_long(&p, &left, &val_b,
2803 &neg, tr_b, sizeof(tr_b),
2804 &c);
2805 if (err)
2806 break;
2807 if (val_b >= bitmap_len || neg ||
2808 val_a > val_b) {
2809 err = -EINVAL;
2810 break;
2811 }
2812 if (left) {
2813 p++;
2814 left--;
2815 }
2816 }
2817
2818 bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
2819 first = 0;
2820 proc_skip_char(&p, &left, '\n');
2821 }
2822 kfree(kbuf);
2823 } else {
2824 unsigned long bit_a, bit_b = 0;
2825
2826 while (left) {
2827 bit_a = find_next_bit(bitmap, bitmap_len, bit_b);
2828 if (bit_a >= bitmap_len)
2829 break;
2830 bit_b = find_next_zero_bit(bitmap, bitmap_len,
2831 bit_a + 1) - 1;
2832
2833 if (!first) {
2834 err = proc_put_char(&buffer, &left, ',');
2835 if (err)
2836 break;
2837 }
2838 err = proc_put_long(&buffer, &left, bit_a, false);
2839 if (err)
2840 break;
2841 if (bit_a != bit_b) {
2842 err = proc_put_char(&buffer, &left, '-');
2843 if (err)
2844 break;
2845 err = proc_put_long(&buffer, &left, bit_b, false);
2846 if (err)
2847 break;
2848 }
2849
2850 first = 0; bit_b++;
2851 }
2852 if (!err)
2853 err = proc_put_char(&buffer, &left, '\n');
2854 }
2855
2856 if (!err) {
2857 if (write) {
2858 if (*ppos)
2859 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
2860 else
2861 bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
2862 }
2863 kfree(tmp_bitmap);
2864 *lenp -= left;
2865 *ppos += *lenp;
2866 return 0;
2867 } else {
2868 kfree(tmp_bitmap);
2869 return err;
2870 }
2871 }
2872
2873 #else /* CONFIG_PROC_SYSCTL */
2874
2875 int proc_dostring(struct ctl_table *table, int write,
2876 void __user *buffer, size_t *lenp, loff_t *ppos)
2877 {
2878 return -ENOSYS;
2879 }
2880
2881 int proc_dointvec(struct ctl_table *table, int write,
2882 void __user *buffer, size_t *lenp, loff_t *ppos)
2883 {
2884 return -ENOSYS;
2885 }
2886
2887 int proc_douintvec(struct ctl_table *table, int write,
2888 void __user *buffer, size_t *lenp, loff_t *ppos)
2889 {
2890 return -ENOSYS;
2891 }
2892
2893 int proc_dointvec_minmax(struct ctl_table *table, int write,
2894 void __user *buffer, size_t *lenp, loff_t *ppos)
2895 {
2896 return -ENOSYS;
2897 }
2898
2899 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2900 void __user *buffer, size_t *lenp, loff_t *ppos)
2901 {
2902 return -ENOSYS;
2903 }
2904
2905 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2906 void __user *buffer, size_t *lenp, loff_t *ppos)
2907 {
2908 return -ENOSYS;
2909 }
2910
2911 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2912 void __user *buffer, size_t *lenp, loff_t *ppos)
2913 {
2914 return -ENOSYS;
2915 }
2916
2917 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2918 void __user *buffer, size_t *lenp, loff_t *ppos)
2919 {
2920 return -ENOSYS;
2921 }
2922
2923 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2924 void __user *buffer,
2925 size_t *lenp, loff_t *ppos)
2926 {
2927 return -ENOSYS;
2928 }
2929
2930
2931 #endif /* CONFIG_PROC_SYSCTL */
2932
2933 /*
2934 * No sense putting this after each symbol definition, twice,
2935 * exception granted :-)
2936 */
2937 EXPORT_SYMBOL(proc_dointvec);
2938 EXPORT_SYMBOL(proc_douintvec);
2939 EXPORT_SYMBOL(proc_dointvec_jiffies);
2940 EXPORT_SYMBOL(proc_dointvec_minmax);
2941 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
2942 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
2943 EXPORT_SYMBOL(proc_dostring);
2944 EXPORT_SYMBOL(proc_doulongvec_minmax);
2945 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
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