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sysctl: handle error writing UINT_MAX to u32 fields
[mirror_ubuntu-zesty-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/efi.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 #ifdef CONFIG_USER_NS
108 extern int unprivileged_userns_clone;
109 #endif
110 extern int pid_max;
111 extern int pid_max_min, pid_max_max;
112 extern int percpu_pagelist_fraction;
113 extern int compat_log;
114 extern int latencytop_enabled;
115 extern int sysctl_nr_open_min, sysctl_nr_open_max;
116 #ifndef CONFIG_MMU
117 extern int sysctl_nr_trim_pages;
118 #endif
119
120 /* Constants used for minimum and maximum */
121 #ifdef CONFIG_LOCKUP_DETECTOR
122 static int sixty = 60;
123 #endif
124
125 static int __maybe_unused neg_one = -1;
126
127 static int zero;
128 static int __maybe_unused one = 1;
129 static int __maybe_unused two = 2;
130 static int __maybe_unused four = 4;
131 static unsigned long one_ul = 1;
132 static int one_hundred = 100;
133 #ifdef CONFIG_PRINTK
134 static int ten_thousand = 10000;
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_WARN;
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 unsigned int secure_boot_enabled;
284 int secure_boot_proc_handler(struct ctl_table *table, int write,
285 void __user *buffer, size_t *lenp, loff_t *ppos)
286 {
287 secure_boot_enabled = efi_enabled(EFI_SECURE_BOOT);
288 return proc_dointvec(table, write, buffer, lenp, ppos);
289 }
290
291 static unsigned int moksbstate_disabled;
292 int moksbstate_disabled_proc_handler(struct ctl_table *table, int write,
293 void __user *buffer, size_t *lenp, loff_t *ppos)
294 {
295 moksbstate_disabled = efi_enabled(EFI_MOKSBSTATE_DISABLED);
296 return proc_dointvec(table, write, buffer, lenp, ppos);
297 }
298
299 static struct ctl_table kern_table[] = {
300 {
301 .procname = "secure_boot",
302 .data = &secure_boot_enabled,
303 .maxlen = sizeof(unsigned int),
304 .mode = 0444,
305 .proc_handler = secure_boot_proc_handler,
306 },
307 {
308 .procname = "moksbstate_disabled",
309 .data = &moksbstate_disabled,
310 .maxlen = sizeof(unsigned int),
311 .mode = 0444,
312 .proc_handler = moksbstate_disabled_proc_handler,
313 },
314 {
315 .procname = "sched_child_runs_first",
316 .data = &sysctl_sched_child_runs_first,
317 .maxlen = sizeof(unsigned int),
318 .mode = 0644,
319 .proc_handler = proc_dointvec,
320 },
321 #ifdef CONFIG_SCHED_DEBUG
322 {
323 .procname = "sched_min_granularity_ns",
324 .data = &sysctl_sched_min_granularity,
325 .maxlen = sizeof(unsigned int),
326 .mode = 0644,
327 .proc_handler = sched_proc_update_handler,
328 .extra1 = &min_sched_granularity_ns,
329 .extra2 = &max_sched_granularity_ns,
330 },
331 {
332 .procname = "sched_latency_ns",
333 .data = &sysctl_sched_latency,
334 .maxlen = sizeof(unsigned int),
335 .mode = 0644,
336 .proc_handler = sched_proc_update_handler,
337 .extra1 = &min_sched_granularity_ns,
338 .extra2 = &max_sched_granularity_ns,
339 },
340 {
341 .procname = "sched_wakeup_granularity_ns",
342 .data = &sysctl_sched_wakeup_granularity,
343 .maxlen = sizeof(unsigned int),
344 .mode = 0644,
345 .proc_handler = sched_proc_update_handler,
346 .extra1 = &min_wakeup_granularity_ns,
347 .extra2 = &max_wakeup_granularity_ns,
348 },
349 #ifdef CONFIG_SMP
350 {
351 .procname = "sched_tunable_scaling",
352 .data = &sysctl_sched_tunable_scaling,
353 .maxlen = sizeof(enum sched_tunable_scaling),
354 .mode = 0644,
355 .proc_handler = sched_proc_update_handler,
356 .extra1 = &min_sched_tunable_scaling,
357 .extra2 = &max_sched_tunable_scaling,
358 },
359 {
360 .procname = "sched_migration_cost_ns",
361 .data = &sysctl_sched_migration_cost,
362 .maxlen = sizeof(unsigned int),
363 .mode = 0644,
364 .proc_handler = proc_dointvec,
365 },
366 {
367 .procname = "sched_nr_migrate",
368 .data = &sysctl_sched_nr_migrate,
369 .maxlen = sizeof(unsigned int),
370 .mode = 0644,
371 .proc_handler = proc_dointvec,
372 },
373 {
374 .procname = "sched_time_avg_ms",
375 .data = &sysctl_sched_time_avg,
376 .maxlen = sizeof(unsigned int),
377 .mode = 0644,
378 .proc_handler = proc_dointvec,
379 },
380 {
381 .procname = "sched_shares_window_ns",
382 .data = &sysctl_sched_shares_window,
383 .maxlen = sizeof(unsigned int),
384 .mode = 0644,
385 .proc_handler = proc_dointvec,
386 },
387 #endif /* CONFIG_SMP */
388 #ifdef CONFIG_NUMA_BALANCING
389 {
390 .procname = "numa_balancing_scan_delay_ms",
391 .data = &sysctl_numa_balancing_scan_delay,
392 .maxlen = sizeof(unsigned int),
393 .mode = 0644,
394 .proc_handler = proc_dointvec,
395 },
396 {
397 .procname = "numa_balancing_scan_period_min_ms",
398 .data = &sysctl_numa_balancing_scan_period_min,
399 .maxlen = sizeof(unsigned int),
400 .mode = 0644,
401 .proc_handler = proc_dointvec,
402 },
403 {
404 .procname = "numa_balancing_scan_period_max_ms",
405 .data = &sysctl_numa_balancing_scan_period_max,
406 .maxlen = sizeof(unsigned int),
407 .mode = 0644,
408 .proc_handler = proc_dointvec,
409 },
410 {
411 .procname = "numa_balancing_scan_size_mb",
412 .data = &sysctl_numa_balancing_scan_size,
413 .maxlen = sizeof(unsigned int),
414 .mode = 0644,
415 .proc_handler = proc_dointvec_minmax,
416 .extra1 = &one,
417 },
418 {
419 .procname = "numa_balancing",
420 .data = NULL, /* filled in by handler */
421 .maxlen = sizeof(unsigned int),
422 .mode = 0644,
423 .proc_handler = sysctl_numa_balancing,
424 .extra1 = &zero,
425 .extra2 = &one,
426 },
427 #endif /* CONFIG_NUMA_BALANCING */
428 #endif /* CONFIG_SCHED_DEBUG */
429 {
430 .procname = "sched_rt_period_us",
431 .data = &sysctl_sched_rt_period,
432 .maxlen = sizeof(unsigned int),
433 .mode = 0644,
434 .proc_handler = sched_rt_handler,
435 },
436 {
437 .procname = "sched_rt_runtime_us",
438 .data = &sysctl_sched_rt_runtime,
439 .maxlen = sizeof(int),
440 .mode = 0644,
441 .proc_handler = sched_rt_handler,
442 },
443 {
444 .procname = "sched_rr_timeslice_ms",
445 .data = &sched_rr_timeslice,
446 .maxlen = sizeof(int),
447 .mode = 0644,
448 .proc_handler = sched_rr_handler,
449 },
450 #ifdef CONFIG_SCHED_AUTOGROUP
451 {
452 .procname = "sched_autogroup_enabled",
453 .data = &sysctl_sched_autogroup_enabled,
454 .maxlen = sizeof(unsigned int),
455 .mode = 0644,
456 .proc_handler = proc_dointvec_minmax,
457 .extra1 = &zero,
458 .extra2 = &one,
459 },
460 #endif
461 #ifdef CONFIG_CFS_BANDWIDTH
462 {
463 .procname = "sched_cfs_bandwidth_slice_us",
464 .data = &sysctl_sched_cfs_bandwidth_slice,
465 .maxlen = sizeof(unsigned int),
466 .mode = 0644,
467 .proc_handler = proc_dointvec_minmax,
468 .extra1 = &one,
469 },
470 #endif
471 #ifdef CONFIG_PROVE_LOCKING
472 {
473 .procname = "prove_locking",
474 .data = &prove_locking,
475 .maxlen = sizeof(int),
476 .mode = 0644,
477 .proc_handler = proc_dointvec,
478 },
479 #endif
480 #ifdef CONFIG_LOCK_STAT
481 {
482 .procname = "lock_stat",
483 .data = &lock_stat,
484 .maxlen = sizeof(int),
485 .mode = 0644,
486 .proc_handler = proc_dointvec,
487 },
488 #endif
489 {
490 .procname = "panic",
491 .data = &panic_timeout,
492 .maxlen = sizeof(int),
493 .mode = 0644,
494 .proc_handler = proc_dointvec,
495 },
496 #ifdef CONFIG_COREDUMP
497 {
498 .procname = "core_uses_pid",
499 .data = &core_uses_pid,
500 .maxlen = sizeof(int),
501 .mode = 0644,
502 .proc_handler = proc_dointvec,
503 },
504 {
505 .procname = "core_pattern",
506 .data = core_pattern,
507 .maxlen = CORENAME_MAX_SIZE,
508 .mode = 0644,
509 .proc_handler = proc_dostring_coredump,
510 },
511 {
512 .procname = "core_pipe_limit",
513 .data = &core_pipe_limit,
514 .maxlen = sizeof(unsigned int),
515 .mode = 0644,
516 .proc_handler = proc_dointvec,
517 },
518 #endif
519 #ifdef CONFIG_USER_NS
520 {
521 .procname = "unprivileged_userns_clone",
522 .data = &unprivileged_userns_clone,
523 .maxlen = sizeof(int),
524 .mode = 0644,
525 .proc_handler = proc_dointvec,
526 },
527 #endif
528 #ifdef CONFIG_PROC_SYSCTL
529 {
530 .procname = "tainted",
531 .maxlen = sizeof(long),
532 .mode = 0644,
533 .proc_handler = proc_taint,
534 },
535 {
536 .procname = "sysctl_writes_strict",
537 .data = &sysctl_writes_strict,
538 .maxlen = sizeof(int),
539 .mode = 0644,
540 .proc_handler = proc_dointvec_minmax,
541 .extra1 = &neg_one,
542 .extra2 = &one,
543 },
544 #endif
545 #ifdef CONFIG_LATENCYTOP
546 {
547 .procname = "latencytop",
548 .data = &latencytop_enabled,
549 .maxlen = sizeof(int),
550 .mode = 0644,
551 .proc_handler = proc_dointvec,
552 },
553 #endif
554 #ifdef CONFIG_BLK_DEV_INITRD
555 {
556 .procname = "real-root-dev",
557 .data = &real_root_dev,
558 .maxlen = sizeof(int),
559 .mode = 0644,
560 .proc_handler = proc_dointvec,
561 },
562 #endif
563 {
564 .procname = "print-fatal-signals",
565 .data = &print_fatal_signals,
566 .maxlen = sizeof(int),
567 .mode = 0644,
568 .proc_handler = proc_dointvec,
569 },
570 #ifdef CONFIG_SPARC
571 {
572 .procname = "reboot-cmd",
573 .data = reboot_command,
574 .maxlen = 256,
575 .mode = 0644,
576 .proc_handler = proc_dostring,
577 },
578 {
579 .procname = "stop-a",
580 .data = &stop_a_enabled,
581 .maxlen = sizeof (int),
582 .mode = 0644,
583 .proc_handler = proc_dointvec,
584 },
585 {
586 .procname = "scons-poweroff",
587 .data = &scons_pwroff,
588 .maxlen = sizeof (int),
589 .mode = 0644,
590 .proc_handler = proc_dointvec,
591 },
592 #endif
593 #ifdef CONFIG_SPARC64
594 {
595 .procname = "tsb-ratio",
596 .data = &sysctl_tsb_ratio,
597 .maxlen = sizeof (int),
598 .mode = 0644,
599 .proc_handler = proc_dointvec,
600 },
601 #endif
602 #ifdef __hppa__
603 {
604 .procname = "soft-power",
605 .data = &pwrsw_enabled,
606 .maxlen = sizeof (int),
607 .mode = 0644,
608 .proc_handler = proc_dointvec,
609 },
610 #endif
611 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
612 {
613 .procname = "unaligned-trap",
614 .data = &unaligned_enabled,
615 .maxlen = sizeof (int),
616 .mode = 0644,
617 .proc_handler = proc_dointvec,
618 },
619 #endif
620 {
621 .procname = "ctrl-alt-del",
622 .data = &C_A_D,
623 .maxlen = sizeof(int),
624 .mode = 0644,
625 .proc_handler = proc_dointvec,
626 },
627 #ifdef CONFIG_FUNCTION_TRACER
628 {
629 .procname = "ftrace_enabled",
630 .data = &ftrace_enabled,
631 .maxlen = sizeof(int),
632 .mode = 0644,
633 .proc_handler = ftrace_enable_sysctl,
634 },
635 #endif
636 #ifdef CONFIG_STACK_TRACER
637 {
638 .procname = "stack_tracer_enabled",
639 .data = &stack_tracer_enabled,
640 .maxlen = sizeof(int),
641 .mode = 0644,
642 .proc_handler = stack_trace_sysctl,
643 },
644 #endif
645 #ifdef CONFIG_TRACING
646 {
647 .procname = "ftrace_dump_on_oops",
648 .data = &ftrace_dump_on_oops,
649 .maxlen = sizeof(int),
650 .mode = 0644,
651 .proc_handler = proc_dointvec,
652 },
653 {
654 .procname = "traceoff_on_warning",
655 .data = &__disable_trace_on_warning,
656 .maxlen = sizeof(__disable_trace_on_warning),
657 .mode = 0644,
658 .proc_handler = proc_dointvec,
659 },
660 {
661 .procname = "tracepoint_printk",
662 .data = &tracepoint_printk,
663 .maxlen = sizeof(tracepoint_printk),
664 .mode = 0644,
665 .proc_handler = proc_dointvec,
666 },
667 #endif
668 #ifdef CONFIG_KEXEC_CORE
669 {
670 .procname = "kexec_load_disabled",
671 .data = &kexec_load_disabled,
672 .maxlen = sizeof(int),
673 .mode = 0644,
674 /* only handle a transition from default "0" to "1" */
675 .proc_handler = proc_dointvec_minmax,
676 .extra1 = &one,
677 .extra2 = &one,
678 },
679 #endif
680 #ifdef CONFIG_MODULES
681 {
682 .procname = "modprobe",
683 .data = &modprobe_path,
684 .maxlen = KMOD_PATH_LEN,
685 .mode = 0644,
686 .proc_handler = proc_dostring,
687 },
688 {
689 .procname = "modules_disabled",
690 .data = &modules_disabled,
691 .maxlen = sizeof(int),
692 .mode = 0644,
693 /* only handle a transition from default "0" to "1" */
694 .proc_handler = proc_dointvec_minmax,
695 .extra1 = &one,
696 .extra2 = &one,
697 },
698 #endif
699 #ifdef CONFIG_UEVENT_HELPER
700 {
701 .procname = "hotplug",
702 .data = &uevent_helper,
703 .maxlen = UEVENT_HELPER_PATH_LEN,
704 .mode = 0644,
705 .proc_handler = proc_dostring,
706 },
707 #endif
708 #ifdef CONFIG_CHR_DEV_SG
709 {
710 .procname = "sg-big-buff",
711 .data = &sg_big_buff,
712 .maxlen = sizeof (int),
713 .mode = 0444,
714 .proc_handler = proc_dointvec,
715 },
716 #endif
717 #ifdef CONFIG_BSD_PROCESS_ACCT
718 {
719 .procname = "acct",
720 .data = &acct_parm,
721 .maxlen = 3*sizeof(int),
722 .mode = 0644,
723 .proc_handler = proc_dointvec,
724 },
725 #endif
726 #ifdef CONFIG_MAGIC_SYSRQ
727 {
728 .procname = "sysrq",
729 .data = &__sysrq_enabled,
730 .maxlen = sizeof (int),
731 .mode = 0644,
732 .proc_handler = sysrq_sysctl_handler,
733 },
734 #endif
735 #ifdef CONFIG_PROC_SYSCTL
736 {
737 .procname = "cad_pid",
738 .data = NULL,
739 .maxlen = sizeof (int),
740 .mode = 0600,
741 .proc_handler = proc_do_cad_pid,
742 },
743 #endif
744 {
745 .procname = "threads-max",
746 .data = NULL,
747 .maxlen = sizeof(int),
748 .mode = 0644,
749 .proc_handler = sysctl_max_threads,
750 },
751 {
752 .procname = "random",
753 .mode = 0555,
754 .child = random_table,
755 },
756 {
757 .procname = "usermodehelper",
758 .mode = 0555,
759 .child = usermodehelper_table,
760 },
761 {
762 .procname = "overflowuid",
763 .data = &overflowuid,
764 .maxlen = sizeof(int),
765 .mode = 0644,
766 .proc_handler = proc_dointvec_minmax,
767 .extra1 = &minolduid,
768 .extra2 = &maxolduid,
769 },
770 {
771 .procname = "overflowgid",
772 .data = &overflowgid,
773 .maxlen = sizeof(int),
774 .mode = 0644,
775 .proc_handler = proc_dointvec_minmax,
776 .extra1 = &minolduid,
777 .extra2 = &maxolduid,
778 },
779 #ifdef CONFIG_S390
780 #ifdef CONFIG_MATHEMU
781 {
782 .procname = "ieee_emulation_warnings",
783 .data = &sysctl_ieee_emulation_warnings,
784 .maxlen = sizeof(int),
785 .mode = 0644,
786 .proc_handler = proc_dointvec,
787 },
788 #endif
789 {
790 .procname = "userprocess_debug",
791 .data = &show_unhandled_signals,
792 .maxlen = sizeof(int),
793 .mode = 0644,
794 .proc_handler = proc_dointvec,
795 },
796 #endif
797 {
798 .procname = "pid_max",
799 .data = &pid_max,
800 .maxlen = sizeof (int),
801 .mode = 0644,
802 .proc_handler = proc_dointvec_minmax,
803 .extra1 = &pid_max_min,
804 .extra2 = &pid_max_max,
805 },
806 {
807 .procname = "panic_on_oops",
808 .data = &panic_on_oops,
809 .maxlen = sizeof(int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec,
812 },
813 #if defined CONFIG_PRINTK
814 {
815 .procname = "printk",
816 .data = &console_loglevel,
817 .maxlen = 4*sizeof(int),
818 .mode = 0644,
819 .proc_handler = proc_dointvec,
820 },
821 {
822 .procname = "printk_ratelimit",
823 .data = &printk_ratelimit_state.interval,
824 .maxlen = sizeof(int),
825 .mode = 0644,
826 .proc_handler = proc_dointvec_jiffies,
827 },
828 {
829 .procname = "printk_ratelimit_burst",
830 .data = &printk_ratelimit_state.burst,
831 .maxlen = sizeof(int),
832 .mode = 0644,
833 .proc_handler = proc_dointvec,
834 },
835 {
836 .procname = "printk_delay",
837 .data = &printk_delay_msec,
838 .maxlen = sizeof(int),
839 .mode = 0644,
840 .proc_handler = proc_dointvec_minmax,
841 .extra1 = &zero,
842 .extra2 = &ten_thousand,
843 },
844 {
845 .procname = "dmesg_restrict",
846 .data = &dmesg_restrict,
847 .maxlen = sizeof(int),
848 .mode = 0644,
849 .proc_handler = proc_dointvec_minmax_sysadmin,
850 .extra1 = &zero,
851 .extra2 = &one,
852 },
853 {
854 .procname = "kptr_restrict",
855 .data = &kptr_restrict,
856 .maxlen = sizeof(int),
857 .mode = 0644,
858 .proc_handler = proc_dointvec_minmax_sysadmin,
859 .extra1 = &zero,
860 .extra2 = &two,
861 },
862 #endif
863 {
864 .procname = "ngroups_max",
865 .data = &ngroups_max,
866 .maxlen = sizeof (int),
867 .mode = 0444,
868 .proc_handler = proc_dointvec,
869 },
870 {
871 .procname = "cap_last_cap",
872 .data = (void *)&cap_last_cap,
873 .maxlen = sizeof(int),
874 .mode = 0444,
875 .proc_handler = proc_dointvec,
876 },
877 #if defined(CONFIG_LOCKUP_DETECTOR)
878 {
879 .procname = "watchdog",
880 .data = &watchdog_user_enabled,
881 .maxlen = sizeof (int),
882 .mode = 0644,
883 .proc_handler = proc_watchdog,
884 .extra1 = &zero,
885 .extra2 = &one,
886 },
887 {
888 .procname = "watchdog_thresh",
889 .data = &watchdog_thresh,
890 .maxlen = sizeof(int),
891 .mode = 0644,
892 .proc_handler = proc_watchdog_thresh,
893 .extra1 = &zero,
894 .extra2 = &sixty,
895 },
896 {
897 .procname = "nmi_watchdog",
898 .data = &nmi_watchdog_enabled,
899 .maxlen = sizeof (int),
900 .mode = 0644,
901 .proc_handler = proc_nmi_watchdog,
902 .extra1 = &zero,
903 #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
904 .extra2 = &one,
905 #else
906 .extra2 = &zero,
907 #endif
908 },
909 {
910 .procname = "soft_watchdog",
911 .data = &soft_watchdog_enabled,
912 .maxlen = sizeof (int),
913 .mode = 0644,
914 .proc_handler = proc_soft_watchdog,
915 .extra1 = &zero,
916 .extra2 = &one,
917 },
918 {
919 .procname = "watchdog_cpumask",
920 .data = &watchdog_cpumask_bits,
921 .maxlen = NR_CPUS,
922 .mode = 0644,
923 .proc_handler = proc_watchdog_cpumask,
924 },
925 {
926 .procname = "softlockup_panic",
927 .data = &softlockup_panic,
928 .maxlen = sizeof(int),
929 .mode = 0644,
930 .proc_handler = proc_dointvec_minmax,
931 .extra1 = &zero,
932 .extra2 = &one,
933 },
934 #ifdef CONFIG_HARDLOCKUP_DETECTOR
935 {
936 .procname = "hardlockup_panic",
937 .data = &hardlockup_panic,
938 .maxlen = sizeof(int),
939 .mode = 0644,
940 .proc_handler = proc_dointvec_minmax,
941 .extra1 = &zero,
942 .extra2 = &one,
943 },
944 #endif
945 #ifdef CONFIG_SMP
946 {
947 .procname = "softlockup_all_cpu_backtrace",
948 .data = &sysctl_softlockup_all_cpu_backtrace,
949 .maxlen = sizeof(int),
950 .mode = 0644,
951 .proc_handler = proc_dointvec_minmax,
952 .extra1 = &zero,
953 .extra2 = &one,
954 },
955 {
956 .procname = "hardlockup_all_cpu_backtrace",
957 .data = &sysctl_hardlockup_all_cpu_backtrace,
958 .maxlen = sizeof(int),
959 .mode = 0644,
960 .proc_handler = proc_dointvec_minmax,
961 .extra1 = &zero,
962 .extra2 = &one,
963 },
964 #endif /* CONFIG_SMP */
965 #endif
966 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
967 {
968 .procname = "unknown_nmi_panic",
969 .data = &unknown_nmi_panic,
970 .maxlen = sizeof (int),
971 .mode = 0644,
972 .proc_handler = proc_dointvec,
973 },
974 #endif
975 #if defined(CONFIG_X86)
976 {
977 .procname = "panic_on_unrecovered_nmi",
978 .data = &panic_on_unrecovered_nmi,
979 .maxlen = sizeof(int),
980 .mode = 0644,
981 .proc_handler = proc_dointvec,
982 },
983 {
984 .procname = "panic_on_io_nmi",
985 .data = &panic_on_io_nmi,
986 .maxlen = sizeof(int),
987 .mode = 0644,
988 .proc_handler = proc_dointvec,
989 },
990 #ifdef CONFIG_DEBUG_STACKOVERFLOW
991 {
992 .procname = "panic_on_stackoverflow",
993 .data = &sysctl_panic_on_stackoverflow,
994 .maxlen = sizeof(int),
995 .mode = 0644,
996 .proc_handler = proc_dointvec,
997 },
998 #endif
999 {
1000 .procname = "bootloader_type",
1001 .data = &bootloader_type,
1002 .maxlen = sizeof (int),
1003 .mode = 0444,
1004 .proc_handler = proc_dointvec,
1005 },
1006 {
1007 .procname = "bootloader_version",
1008 .data = &bootloader_version,
1009 .maxlen = sizeof (int),
1010 .mode = 0444,
1011 .proc_handler = proc_dointvec,
1012 },
1013 {
1014 .procname = "kstack_depth_to_print",
1015 .data = &kstack_depth_to_print,
1016 .maxlen = sizeof(int),
1017 .mode = 0644,
1018 .proc_handler = proc_dointvec,
1019 },
1020 {
1021 .procname = "io_delay_type",
1022 .data = &io_delay_type,
1023 .maxlen = sizeof(int),
1024 .mode = 0644,
1025 .proc_handler = proc_dointvec,
1026 },
1027 #endif
1028 #if defined(CONFIG_MMU)
1029 {
1030 .procname = "randomize_va_space",
1031 .data = &randomize_va_space,
1032 .maxlen = sizeof(int),
1033 .mode = 0644,
1034 .proc_handler = proc_dointvec,
1035 },
1036 #endif
1037 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
1038 {
1039 .procname = "spin_retry",
1040 .data = &spin_retry,
1041 .maxlen = sizeof (int),
1042 .mode = 0644,
1043 .proc_handler = proc_dointvec,
1044 },
1045 #endif
1046 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
1047 {
1048 .procname = "acpi_video_flags",
1049 .data = &acpi_realmode_flags,
1050 .maxlen = sizeof (unsigned long),
1051 .mode = 0644,
1052 .proc_handler = proc_doulongvec_minmax,
1053 },
1054 #endif
1055 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
1056 {
1057 .procname = "ignore-unaligned-usertrap",
1058 .data = &no_unaligned_warning,
1059 .maxlen = sizeof (int),
1060 .mode = 0644,
1061 .proc_handler = proc_dointvec,
1062 },
1063 #endif
1064 #ifdef CONFIG_IA64
1065 {
1066 .procname = "unaligned-dump-stack",
1067 .data = &unaligned_dump_stack,
1068 .maxlen = sizeof (int),
1069 .mode = 0644,
1070 .proc_handler = proc_dointvec,
1071 },
1072 #endif
1073 #ifdef CONFIG_DETECT_HUNG_TASK
1074 {
1075 .procname = "hung_task_panic",
1076 .data = &sysctl_hung_task_panic,
1077 .maxlen = sizeof(int),
1078 .mode = 0644,
1079 .proc_handler = proc_dointvec_minmax,
1080 .extra1 = &zero,
1081 .extra2 = &one,
1082 },
1083 {
1084 .procname = "hung_task_check_count",
1085 .data = &sysctl_hung_task_check_count,
1086 .maxlen = sizeof(int),
1087 .mode = 0644,
1088 .proc_handler = proc_dointvec_minmax,
1089 .extra1 = &zero,
1090 },
1091 {
1092 .procname = "hung_task_timeout_secs",
1093 .data = &sysctl_hung_task_timeout_secs,
1094 .maxlen = sizeof(unsigned long),
1095 .mode = 0644,
1096 .proc_handler = proc_dohung_task_timeout_secs,
1097 .extra2 = &hung_task_timeout_max,
1098 },
1099 {
1100 .procname = "hung_task_warnings",
1101 .data = &sysctl_hung_task_warnings,
1102 .maxlen = sizeof(int),
1103 .mode = 0644,
1104 .proc_handler = proc_dointvec_minmax,
1105 .extra1 = &neg_one,
1106 },
1107 #endif
1108 #ifdef CONFIG_COMPAT
1109 {
1110 .procname = "compat-log",
1111 .data = &compat_log,
1112 .maxlen = sizeof (int),
1113 .mode = 0644,
1114 .proc_handler = proc_dointvec,
1115 },
1116 #endif
1117 #ifdef CONFIG_RT_MUTEXES
1118 {
1119 .procname = "max_lock_depth",
1120 .data = &max_lock_depth,
1121 .maxlen = sizeof(int),
1122 .mode = 0644,
1123 .proc_handler = proc_dointvec,
1124 },
1125 #endif
1126 {
1127 .procname = "poweroff_cmd",
1128 .data = &poweroff_cmd,
1129 .maxlen = POWEROFF_CMD_PATH_LEN,
1130 .mode = 0644,
1131 .proc_handler = proc_dostring,
1132 },
1133 #ifdef CONFIG_KEYS
1134 {
1135 .procname = "keys",
1136 .mode = 0555,
1137 .child = key_sysctls,
1138 },
1139 #endif
1140 #ifdef CONFIG_PERF_EVENTS
1141 /*
1142 * User-space scripts rely on the existence of this file
1143 * as a feature check for perf_events being enabled.
1144 *
1145 * So it's an ABI, do not remove!
1146 */
1147 {
1148 .procname = "perf_event_paranoid",
1149 .data = &sysctl_perf_event_paranoid,
1150 .maxlen = sizeof(sysctl_perf_event_paranoid),
1151 .mode = 0644,
1152 .proc_handler = proc_dointvec,
1153 },
1154 {
1155 .procname = "perf_event_mlock_kb",
1156 .data = &sysctl_perf_event_mlock,
1157 .maxlen = sizeof(sysctl_perf_event_mlock),
1158 .mode = 0644,
1159 .proc_handler = proc_dointvec,
1160 },
1161 {
1162 .procname = "perf_event_max_sample_rate",
1163 .data = &sysctl_perf_event_sample_rate,
1164 .maxlen = sizeof(sysctl_perf_event_sample_rate),
1165 .mode = 0644,
1166 .proc_handler = perf_proc_update_handler,
1167 .extra1 = &one,
1168 },
1169 {
1170 .procname = "perf_cpu_time_max_percent",
1171 .data = &sysctl_perf_cpu_time_max_percent,
1172 .maxlen = sizeof(sysctl_perf_cpu_time_max_percent),
1173 .mode = 0644,
1174 .proc_handler = perf_cpu_time_max_percent_handler,
1175 .extra1 = &zero,
1176 .extra2 = &one_hundred,
1177 },
1178 #endif
1179 #ifdef CONFIG_KMEMCHECK
1180 {
1181 .procname = "kmemcheck",
1182 .data = &kmemcheck_enabled,
1183 .maxlen = sizeof(int),
1184 .mode = 0644,
1185 .proc_handler = proc_dointvec,
1186 },
1187 #endif
1188 {
1189 .procname = "panic_on_warn",
1190 .data = &panic_on_warn,
1191 .maxlen = sizeof(int),
1192 .mode = 0644,
1193 .proc_handler = proc_dointvec_minmax,
1194 .extra1 = &zero,
1195 .extra2 = &one,
1196 },
1197 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
1198 {
1199 .procname = "timer_migration",
1200 .data = &sysctl_timer_migration,
1201 .maxlen = sizeof(unsigned int),
1202 .mode = 0644,
1203 .proc_handler = timer_migration_handler,
1204 },
1205 #endif
1206 #ifdef CONFIG_BPF_SYSCALL
1207 {
1208 .procname = "unprivileged_bpf_disabled",
1209 .data = &sysctl_unprivileged_bpf_disabled,
1210 .maxlen = sizeof(sysctl_unprivileged_bpf_disabled),
1211 .mode = 0644,
1212 /* only handle a transition from default "0" to "1" */
1213 .proc_handler = proc_dointvec_minmax,
1214 .extra1 = &one,
1215 .extra2 = &one,
1216 },
1217 #endif
1218 { }
1219 };
1220
1221 static struct ctl_table vm_table[] = {
1222 {
1223 .procname = "overcommit_memory",
1224 .data = &sysctl_overcommit_memory,
1225 .maxlen = sizeof(sysctl_overcommit_memory),
1226 .mode = 0644,
1227 .proc_handler = proc_dointvec_minmax,
1228 .extra1 = &zero,
1229 .extra2 = &two,
1230 },
1231 {
1232 .procname = "panic_on_oom",
1233 .data = &sysctl_panic_on_oom,
1234 .maxlen = sizeof(sysctl_panic_on_oom),
1235 .mode = 0644,
1236 .proc_handler = proc_dointvec_minmax,
1237 .extra1 = &zero,
1238 .extra2 = &two,
1239 },
1240 {
1241 .procname = "oom_kill_allocating_task",
1242 .data = &sysctl_oom_kill_allocating_task,
1243 .maxlen = sizeof(sysctl_oom_kill_allocating_task),
1244 .mode = 0644,
1245 .proc_handler = proc_dointvec,
1246 },
1247 {
1248 .procname = "oom_dump_tasks",
1249 .data = &sysctl_oom_dump_tasks,
1250 .maxlen = sizeof(sysctl_oom_dump_tasks),
1251 .mode = 0644,
1252 .proc_handler = proc_dointvec,
1253 },
1254 {
1255 .procname = "overcommit_ratio",
1256 .data = &sysctl_overcommit_ratio,
1257 .maxlen = sizeof(sysctl_overcommit_ratio),
1258 .mode = 0644,
1259 .proc_handler = overcommit_ratio_handler,
1260 },
1261 {
1262 .procname = "overcommit_kbytes",
1263 .data = &sysctl_overcommit_kbytes,
1264 .maxlen = sizeof(sysctl_overcommit_kbytes),
1265 .mode = 0644,
1266 .proc_handler = overcommit_kbytes_handler,
1267 },
1268 {
1269 .procname = "page-cluster",
1270 .data = &page_cluster,
1271 .maxlen = sizeof(int),
1272 .mode = 0644,
1273 .proc_handler = proc_dointvec_minmax,
1274 .extra1 = &zero,
1275 },
1276 {
1277 .procname = "dirty_background_ratio",
1278 .data = &dirty_background_ratio,
1279 .maxlen = sizeof(dirty_background_ratio),
1280 .mode = 0644,
1281 .proc_handler = dirty_background_ratio_handler,
1282 .extra1 = &zero,
1283 .extra2 = &one_hundred,
1284 },
1285 {
1286 .procname = "dirty_background_bytes",
1287 .data = &dirty_background_bytes,
1288 .maxlen = sizeof(dirty_background_bytes),
1289 .mode = 0644,
1290 .proc_handler = dirty_background_bytes_handler,
1291 .extra1 = &one_ul,
1292 },
1293 {
1294 .procname = "dirty_ratio",
1295 .data = &vm_dirty_ratio,
1296 .maxlen = sizeof(vm_dirty_ratio),
1297 .mode = 0644,
1298 .proc_handler = dirty_ratio_handler,
1299 .extra1 = &zero,
1300 .extra2 = &one_hundred,
1301 },
1302 {
1303 .procname = "dirty_bytes",
1304 .data = &vm_dirty_bytes,
1305 .maxlen = sizeof(vm_dirty_bytes),
1306 .mode = 0644,
1307 .proc_handler = dirty_bytes_handler,
1308 .extra1 = &dirty_bytes_min,
1309 },
1310 {
1311 .procname = "dirty_writeback_centisecs",
1312 .data = &dirty_writeback_interval,
1313 .maxlen = sizeof(dirty_writeback_interval),
1314 .mode = 0644,
1315 .proc_handler = dirty_writeback_centisecs_handler,
1316 },
1317 {
1318 .procname = "dirty_expire_centisecs",
1319 .data = &dirty_expire_interval,
1320 .maxlen = sizeof(dirty_expire_interval),
1321 .mode = 0644,
1322 .proc_handler = proc_dointvec_minmax,
1323 .extra1 = &zero,
1324 },
1325 {
1326 .procname = "dirtytime_expire_seconds",
1327 .data = &dirtytime_expire_interval,
1328 .maxlen = sizeof(dirty_expire_interval),
1329 .mode = 0644,
1330 .proc_handler = dirtytime_interval_handler,
1331 .extra1 = &zero,
1332 },
1333 {
1334 .procname = "nr_pdflush_threads",
1335 .mode = 0444 /* read-only */,
1336 .proc_handler = pdflush_proc_obsolete,
1337 },
1338 {
1339 .procname = "swappiness",
1340 .data = &vm_swappiness,
1341 .maxlen = sizeof(vm_swappiness),
1342 .mode = 0644,
1343 .proc_handler = proc_dointvec_minmax,
1344 .extra1 = &zero,
1345 .extra2 = &one_hundred,
1346 },
1347 #ifdef CONFIG_HUGETLB_PAGE
1348 {
1349 .procname = "nr_hugepages",
1350 .data = NULL,
1351 .maxlen = sizeof(unsigned long),
1352 .mode = 0644,
1353 .proc_handler = hugetlb_sysctl_handler,
1354 },
1355 #ifdef CONFIG_NUMA
1356 {
1357 .procname = "nr_hugepages_mempolicy",
1358 .data = NULL,
1359 .maxlen = sizeof(unsigned long),
1360 .mode = 0644,
1361 .proc_handler = &hugetlb_mempolicy_sysctl_handler,
1362 },
1363 #endif
1364 {
1365 .procname = "hugetlb_shm_group",
1366 .data = &sysctl_hugetlb_shm_group,
1367 .maxlen = sizeof(gid_t),
1368 .mode = 0644,
1369 .proc_handler = proc_dointvec,
1370 },
1371 {
1372 .procname = "hugepages_treat_as_movable",
1373 .data = &hugepages_treat_as_movable,
1374 .maxlen = sizeof(int),
1375 .mode = 0644,
1376 .proc_handler = proc_dointvec,
1377 },
1378 {
1379 .procname = "nr_overcommit_hugepages",
1380 .data = NULL,
1381 .maxlen = sizeof(unsigned long),
1382 .mode = 0644,
1383 .proc_handler = hugetlb_overcommit_handler,
1384 },
1385 #endif
1386 {
1387 .procname = "lowmem_reserve_ratio",
1388 .data = &sysctl_lowmem_reserve_ratio,
1389 .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
1390 .mode = 0644,
1391 .proc_handler = lowmem_reserve_ratio_sysctl_handler,
1392 },
1393 {
1394 .procname = "drop_caches",
1395 .data = &sysctl_drop_caches,
1396 .maxlen = sizeof(int),
1397 .mode = 0644,
1398 .proc_handler = drop_caches_sysctl_handler,
1399 .extra1 = &one,
1400 .extra2 = &four,
1401 },
1402 #ifdef CONFIG_COMPACTION
1403 {
1404 .procname = "compact_memory",
1405 .data = &sysctl_compact_memory,
1406 .maxlen = sizeof(int),
1407 .mode = 0200,
1408 .proc_handler = sysctl_compaction_handler,
1409 },
1410 {
1411 .procname = "extfrag_threshold",
1412 .data = &sysctl_extfrag_threshold,
1413 .maxlen = sizeof(int),
1414 .mode = 0644,
1415 .proc_handler = sysctl_extfrag_handler,
1416 .extra1 = &min_extfrag_threshold,
1417 .extra2 = &max_extfrag_threshold,
1418 },
1419 {
1420 .procname = "compact_unevictable_allowed",
1421 .data = &sysctl_compact_unevictable_allowed,
1422 .maxlen = sizeof(int),
1423 .mode = 0644,
1424 .proc_handler = proc_dointvec,
1425 .extra1 = &zero,
1426 .extra2 = &one,
1427 },
1428
1429 #endif /* CONFIG_COMPACTION */
1430 {
1431 .procname = "min_free_kbytes",
1432 .data = &min_free_kbytes,
1433 .maxlen = sizeof(min_free_kbytes),
1434 .mode = 0644,
1435 .proc_handler = min_free_kbytes_sysctl_handler,
1436 .extra1 = &zero,
1437 },
1438 {
1439 .procname = "percpu_pagelist_fraction",
1440 .data = &percpu_pagelist_fraction,
1441 .maxlen = sizeof(percpu_pagelist_fraction),
1442 .mode = 0644,
1443 .proc_handler = percpu_pagelist_fraction_sysctl_handler,
1444 .extra1 = &zero,
1445 },
1446 #ifdef CONFIG_MMU
1447 {
1448 .procname = "max_map_count",
1449 .data = &sysctl_max_map_count,
1450 .maxlen = sizeof(sysctl_max_map_count),
1451 .mode = 0644,
1452 .proc_handler = proc_dointvec_minmax,
1453 .extra1 = &zero,
1454 },
1455 #else
1456 {
1457 .procname = "nr_trim_pages",
1458 .data = &sysctl_nr_trim_pages,
1459 .maxlen = sizeof(sysctl_nr_trim_pages),
1460 .mode = 0644,
1461 .proc_handler = proc_dointvec_minmax,
1462 .extra1 = &zero,
1463 },
1464 #endif
1465 {
1466 .procname = "laptop_mode",
1467 .data = &laptop_mode,
1468 .maxlen = sizeof(laptop_mode),
1469 .mode = 0644,
1470 .proc_handler = proc_dointvec_jiffies,
1471 },
1472 {
1473 .procname = "block_dump",
1474 .data = &block_dump,
1475 .maxlen = sizeof(block_dump),
1476 .mode = 0644,
1477 .proc_handler = proc_dointvec,
1478 .extra1 = &zero,
1479 },
1480 {
1481 .procname = "vfs_cache_pressure",
1482 .data = &sysctl_vfs_cache_pressure,
1483 .maxlen = sizeof(sysctl_vfs_cache_pressure),
1484 .mode = 0644,
1485 .proc_handler = proc_dointvec,
1486 .extra1 = &zero,
1487 },
1488 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1489 {
1490 .procname = "legacy_va_layout",
1491 .data = &sysctl_legacy_va_layout,
1492 .maxlen = sizeof(sysctl_legacy_va_layout),
1493 .mode = 0644,
1494 .proc_handler = proc_dointvec,
1495 .extra1 = &zero,
1496 },
1497 #endif
1498 #ifdef CONFIG_NUMA
1499 {
1500 .procname = "zone_reclaim_mode",
1501 .data = &zone_reclaim_mode,
1502 .maxlen = sizeof(zone_reclaim_mode),
1503 .mode = 0644,
1504 .proc_handler = proc_dointvec,
1505 .extra1 = &zero,
1506 },
1507 {
1508 .procname = "min_unmapped_ratio",
1509 .data = &sysctl_min_unmapped_ratio,
1510 .maxlen = sizeof(sysctl_min_unmapped_ratio),
1511 .mode = 0644,
1512 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
1513 .extra1 = &zero,
1514 .extra2 = &one_hundred,
1515 },
1516 {
1517 .procname = "min_slab_ratio",
1518 .data = &sysctl_min_slab_ratio,
1519 .maxlen = sizeof(sysctl_min_slab_ratio),
1520 .mode = 0644,
1521 .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
1522 .extra1 = &zero,
1523 .extra2 = &one_hundred,
1524 },
1525 #endif
1526 #ifdef CONFIG_SMP
1527 {
1528 .procname = "stat_interval",
1529 .data = &sysctl_stat_interval,
1530 .maxlen = sizeof(sysctl_stat_interval),
1531 .mode = 0644,
1532 .proc_handler = proc_dointvec_jiffies,
1533 },
1534 #endif
1535 #ifdef CONFIG_MMU
1536 {
1537 .procname = "mmap_min_addr",
1538 .data = &dac_mmap_min_addr,
1539 .maxlen = sizeof(unsigned long),
1540 .mode = 0644,
1541 .proc_handler = mmap_min_addr_handler,
1542 },
1543 #endif
1544 #ifdef CONFIG_NUMA
1545 {
1546 .procname = "numa_zonelist_order",
1547 .data = &numa_zonelist_order,
1548 .maxlen = NUMA_ZONELIST_ORDER_LEN,
1549 .mode = 0644,
1550 .proc_handler = numa_zonelist_order_handler,
1551 },
1552 #endif
1553 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1554 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1555 {
1556 .procname = "vdso_enabled",
1557 #ifdef CONFIG_X86_32
1558 .data = &vdso32_enabled,
1559 .maxlen = sizeof(vdso32_enabled),
1560 #else
1561 .data = &vdso_enabled,
1562 .maxlen = sizeof(vdso_enabled),
1563 #endif
1564 .mode = 0644,
1565 .proc_handler = proc_dointvec,
1566 .extra1 = &zero,
1567 },
1568 #endif
1569 #ifdef CONFIG_HIGHMEM
1570 {
1571 .procname = "highmem_is_dirtyable",
1572 .data = &vm_highmem_is_dirtyable,
1573 .maxlen = sizeof(vm_highmem_is_dirtyable),
1574 .mode = 0644,
1575 .proc_handler = proc_dointvec_minmax,
1576 .extra1 = &zero,
1577 .extra2 = &one,
1578 },
1579 #endif
1580 #ifdef CONFIG_MEMORY_FAILURE
1581 {
1582 .procname = "memory_failure_early_kill",
1583 .data = &sysctl_memory_failure_early_kill,
1584 .maxlen = sizeof(sysctl_memory_failure_early_kill),
1585 .mode = 0644,
1586 .proc_handler = proc_dointvec_minmax,
1587 .extra1 = &zero,
1588 .extra2 = &one,
1589 },
1590 {
1591 .procname = "memory_failure_recovery",
1592 .data = &sysctl_memory_failure_recovery,
1593 .maxlen = sizeof(sysctl_memory_failure_recovery),
1594 .mode = 0644,
1595 .proc_handler = proc_dointvec_minmax,
1596 .extra1 = &zero,
1597 .extra2 = &one,
1598 },
1599 #endif
1600 {
1601 .procname = "user_reserve_kbytes",
1602 .data = &sysctl_user_reserve_kbytes,
1603 .maxlen = sizeof(sysctl_user_reserve_kbytes),
1604 .mode = 0644,
1605 .proc_handler = proc_doulongvec_minmax,
1606 },
1607 {
1608 .procname = "admin_reserve_kbytes",
1609 .data = &sysctl_admin_reserve_kbytes,
1610 .maxlen = sizeof(sysctl_admin_reserve_kbytes),
1611 .mode = 0644,
1612 .proc_handler = proc_doulongvec_minmax,
1613 },
1614 { }
1615 };
1616
1617 static struct ctl_table fs_table[] = {
1618 {
1619 .procname = "inode-nr",
1620 .data = &inodes_stat,
1621 .maxlen = 2*sizeof(long),
1622 .mode = 0444,
1623 .proc_handler = proc_nr_inodes,
1624 },
1625 {
1626 .procname = "inode-state",
1627 .data = &inodes_stat,
1628 .maxlen = 7*sizeof(long),
1629 .mode = 0444,
1630 .proc_handler = proc_nr_inodes,
1631 },
1632 {
1633 .procname = "file-nr",
1634 .data = &files_stat,
1635 .maxlen = sizeof(files_stat),
1636 .mode = 0444,
1637 .proc_handler = proc_nr_files,
1638 },
1639 {
1640 .procname = "file-max",
1641 .data = &files_stat.max_files,
1642 .maxlen = sizeof(files_stat.max_files),
1643 .mode = 0644,
1644 .proc_handler = proc_doulongvec_minmax,
1645 },
1646 {
1647 .procname = "nr_open",
1648 .data = &sysctl_nr_open,
1649 .maxlen = sizeof(int),
1650 .mode = 0644,
1651 .proc_handler = proc_dointvec_minmax,
1652 .extra1 = &sysctl_nr_open_min,
1653 .extra2 = &sysctl_nr_open_max,
1654 },
1655 {
1656 .procname = "dentry-state",
1657 .data = &dentry_stat,
1658 .maxlen = 6*sizeof(long),
1659 .mode = 0444,
1660 .proc_handler = proc_nr_dentry,
1661 },
1662 {
1663 .procname = "overflowuid",
1664 .data = &fs_overflowuid,
1665 .maxlen = sizeof(int),
1666 .mode = 0644,
1667 .proc_handler = proc_dointvec_minmax,
1668 .extra1 = &minolduid,
1669 .extra2 = &maxolduid,
1670 },
1671 {
1672 .procname = "overflowgid",
1673 .data = &fs_overflowgid,
1674 .maxlen = sizeof(int),
1675 .mode = 0644,
1676 .proc_handler = proc_dointvec_minmax,
1677 .extra1 = &minolduid,
1678 .extra2 = &maxolduid,
1679 },
1680 #ifdef CONFIG_FILE_LOCKING
1681 {
1682 .procname = "leases-enable",
1683 .data = &leases_enable,
1684 .maxlen = sizeof(int),
1685 .mode = 0644,
1686 .proc_handler = proc_dointvec,
1687 },
1688 #endif
1689 #ifdef CONFIG_DNOTIFY
1690 {
1691 .procname = "dir-notify-enable",
1692 .data = &dir_notify_enable,
1693 .maxlen = sizeof(int),
1694 .mode = 0644,
1695 .proc_handler = proc_dointvec,
1696 },
1697 #endif
1698 #ifdef CONFIG_MMU
1699 #ifdef CONFIG_FILE_LOCKING
1700 {
1701 .procname = "lease-break-time",
1702 .data = &lease_break_time,
1703 .maxlen = sizeof(int),
1704 .mode = 0644,
1705 .proc_handler = proc_dointvec,
1706 },
1707 #endif
1708 #ifdef CONFIG_AIO
1709 {
1710 .procname = "aio-nr",
1711 .data = &aio_nr,
1712 .maxlen = sizeof(aio_nr),
1713 .mode = 0444,
1714 .proc_handler = proc_doulongvec_minmax,
1715 },
1716 {
1717 .procname = "aio-max-nr",
1718 .data = &aio_max_nr,
1719 .maxlen = sizeof(aio_max_nr),
1720 .mode = 0644,
1721 .proc_handler = proc_doulongvec_minmax,
1722 },
1723 #endif /* CONFIG_AIO */
1724 #ifdef CONFIG_INOTIFY_USER
1725 {
1726 .procname = "inotify",
1727 .mode = 0555,
1728 .child = inotify_table,
1729 },
1730 #endif
1731 #ifdef CONFIG_EPOLL
1732 {
1733 .procname = "epoll",
1734 .mode = 0555,
1735 .child = epoll_table,
1736 },
1737 #endif
1738 #endif
1739 {
1740 .procname = "protected_symlinks",
1741 .data = &sysctl_protected_symlinks,
1742 .maxlen = sizeof(int),
1743 .mode = 0600,
1744 .proc_handler = proc_dointvec_minmax,
1745 .extra1 = &zero,
1746 .extra2 = &one,
1747 },
1748 {
1749 .procname = "protected_hardlinks",
1750 .data = &sysctl_protected_hardlinks,
1751 .maxlen = sizeof(int),
1752 .mode = 0600,
1753 .proc_handler = proc_dointvec_minmax,
1754 .extra1 = &zero,
1755 .extra2 = &one,
1756 },
1757 {
1758 .procname = "suid_dumpable",
1759 .data = &suid_dumpable,
1760 .maxlen = sizeof(int),
1761 .mode = 0644,
1762 .proc_handler = proc_dointvec_minmax_coredump,
1763 .extra1 = &zero,
1764 .extra2 = &two,
1765 },
1766 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1767 {
1768 .procname = "binfmt_misc",
1769 .mode = 0555,
1770 .child = sysctl_mount_point,
1771 },
1772 #endif
1773 {
1774 .procname = "pipe-max-size",
1775 .data = &pipe_max_size,
1776 .maxlen = sizeof(int),
1777 .mode = 0644,
1778 .proc_handler = &pipe_proc_fn,
1779 .extra1 = &pipe_min_size,
1780 },
1781 {
1782 .procname = "pipe-user-pages-hard",
1783 .data = &pipe_user_pages_hard,
1784 .maxlen = sizeof(pipe_user_pages_hard),
1785 .mode = 0644,
1786 .proc_handler = proc_doulongvec_minmax,
1787 },
1788 {
1789 .procname = "pipe-user-pages-soft",
1790 .data = &pipe_user_pages_soft,
1791 .maxlen = sizeof(pipe_user_pages_soft),
1792 .mode = 0644,
1793 .proc_handler = proc_doulongvec_minmax,
1794 },
1795 { }
1796 };
1797
1798 static struct ctl_table debug_table[] = {
1799 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
1800 {
1801 .procname = "exception-trace",
1802 .data = &show_unhandled_signals,
1803 .maxlen = sizeof(int),
1804 .mode = 0644,
1805 .proc_handler = proc_dointvec
1806 },
1807 #endif
1808 #if defined(CONFIG_OPTPROBES)
1809 {
1810 .procname = "kprobes-optimization",
1811 .data = &sysctl_kprobes_optimization,
1812 .maxlen = sizeof(int),
1813 .mode = 0644,
1814 .proc_handler = proc_kprobes_optimization_handler,
1815 .extra1 = &zero,
1816 .extra2 = &one,
1817 },
1818 #endif
1819 { }
1820 };
1821
1822 static struct ctl_table dev_table[] = {
1823 { }
1824 };
1825
1826 int __init sysctl_init(void)
1827 {
1828 struct ctl_table_header *hdr;
1829
1830 hdr = register_sysctl_table(sysctl_base_table);
1831 kmemleak_not_leak(hdr);
1832 return 0;
1833 }
1834
1835 #endif /* CONFIG_SYSCTL */
1836
1837 /*
1838 * /proc/sys support
1839 */
1840
1841 #ifdef CONFIG_PROC_SYSCTL
1842
1843 static int _proc_do_string(char *data, int maxlen, int write,
1844 char __user *buffer,
1845 size_t *lenp, loff_t *ppos)
1846 {
1847 size_t len;
1848 char __user *p;
1849 char c;
1850
1851 if (!data || !maxlen || !*lenp) {
1852 *lenp = 0;
1853 return 0;
1854 }
1855
1856 if (write) {
1857 if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) {
1858 /* Only continue writes not past the end of buffer. */
1859 len = strlen(data);
1860 if (len > maxlen - 1)
1861 len = maxlen - 1;
1862
1863 if (*ppos > len)
1864 return 0;
1865 len = *ppos;
1866 } else {
1867 /* Start writing from beginning of buffer. */
1868 len = 0;
1869 }
1870
1871 *ppos += *lenp;
1872 p = buffer;
1873 while ((p - buffer) < *lenp && len < maxlen - 1) {
1874 if (get_user(c, p++))
1875 return -EFAULT;
1876 if (c == 0 || c == '\n')
1877 break;
1878 data[len++] = c;
1879 }
1880 data[len] = 0;
1881 } else {
1882 len = strlen(data);
1883 if (len > maxlen)
1884 len = maxlen;
1885
1886 if (*ppos > len) {
1887 *lenp = 0;
1888 return 0;
1889 }
1890
1891 data += *ppos;
1892 len -= *ppos;
1893
1894 if (len > *lenp)
1895 len = *lenp;
1896 if (len)
1897 if (copy_to_user(buffer, data, len))
1898 return -EFAULT;
1899 if (len < *lenp) {
1900 if (put_user('\n', buffer + len))
1901 return -EFAULT;
1902 len++;
1903 }
1904 *lenp = len;
1905 *ppos += len;
1906 }
1907 return 0;
1908 }
1909
1910 static void warn_sysctl_write(struct ctl_table *table)
1911 {
1912 pr_warn_once("%s wrote to %s when file position was not 0!\n"
1913 "This will not be supported in the future. To silence this\n"
1914 "warning, set kernel.sysctl_writes_strict = -1\n",
1915 current->comm, table->procname);
1916 }
1917
1918 /**
1919 * proc_dostring - read a string sysctl
1920 * @table: the sysctl table
1921 * @write: %TRUE if this is a write to the sysctl file
1922 * @buffer: the user buffer
1923 * @lenp: the size of the user buffer
1924 * @ppos: file position
1925 *
1926 * Reads/writes a string from/to the user buffer. If the kernel
1927 * buffer provided is not large enough to hold the string, the
1928 * string is truncated. The copied string is %NULL-terminated.
1929 * If the string is being read by the user process, it is copied
1930 * and a newline '\n' is added. It is truncated if the buffer is
1931 * not large enough.
1932 *
1933 * Returns 0 on success.
1934 */
1935 int proc_dostring(struct ctl_table *table, int write,
1936 void __user *buffer, size_t *lenp, loff_t *ppos)
1937 {
1938 if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN)
1939 warn_sysctl_write(table);
1940
1941 return _proc_do_string((char *)(table->data), table->maxlen, write,
1942 (char __user *)buffer, lenp, ppos);
1943 }
1944
1945 static size_t proc_skip_spaces(char **buf)
1946 {
1947 size_t ret;
1948 char *tmp = skip_spaces(*buf);
1949 ret = tmp - *buf;
1950 *buf = tmp;
1951 return ret;
1952 }
1953
1954 static void proc_skip_char(char **buf, size_t *size, const char v)
1955 {
1956 while (*size) {
1957 if (**buf != v)
1958 break;
1959 (*size)--;
1960 (*buf)++;
1961 }
1962 }
1963
1964 #define TMPBUFLEN 22
1965 /**
1966 * proc_get_long - reads an ASCII formatted integer from a user buffer
1967 *
1968 * @buf: a kernel buffer
1969 * @size: size of the kernel buffer
1970 * @val: this is where the number will be stored
1971 * @neg: set to %TRUE if number is negative
1972 * @perm_tr: a vector which contains the allowed trailers
1973 * @perm_tr_len: size of the perm_tr vector
1974 * @tr: pointer to store the trailer character
1975 *
1976 * In case of success %0 is returned and @buf and @size are updated with
1977 * the amount of bytes read. If @tr is non-NULL and a trailing
1978 * character exists (size is non-zero after returning from this
1979 * function), @tr is updated with the trailing character.
1980 */
1981 static int proc_get_long(char **buf, size_t *size,
1982 unsigned long *val, bool *neg,
1983 const char *perm_tr, unsigned perm_tr_len, char *tr)
1984 {
1985 int len;
1986 char *p, tmp[TMPBUFLEN];
1987
1988 if (!*size)
1989 return -EINVAL;
1990
1991 len = *size;
1992 if (len > TMPBUFLEN - 1)
1993 len = TMPBUFLEN - 1;
1994
1995 memcpy(tmp, *buf, len);
1996
1997 tmp[len] = 0;
1998 p = tmp;
1999 if (*p == '-' && *size > 1) {
2000 *neg = true;
2001 p++;
2002 } else
2003 *neg = false;
2004 if (!isdigit(*p))
2005 return -EINVAL;
2006
2007 *val = simple_strtoul(p, &p, 0);
2008
2009 len = p - tmp;
2010
2011 /* We don't know if the next char is whitespace thus we may accept
2012 * invalid integers (e.g. 1234...a) or two integers instead of one
2013 * (e.g. 123...1). So lets not allow such large numbers. */
2014 if (len == TMPBUFLEN - 1)
2015 return -EINVAL;
2016
2017 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len))
2018 return -EINVAL;
2019
2020 if (tr && (len < *size))
2021 *tr = *p;
2022
2023 *buf += len;
2024 *size -= len;
2025
2026 return 0;
2027 }
2028
2029 /**
2030 * proc_put_long - converts an integer to a decimal ASCII formatted string
2031 *
2032 * @buf: the user buffer
2033 * @size: the size of the user buffer
2034 * @val: the integer to be converted
2035 * @neg: sign of the number, %TRUE for negative
2036 *
2037 * In case of success %0 is returned and @buf and @size are updated with
2038 * the amount of bytes written.
2039 */
2040 static int proc_put_long(void __user **buf, size_t *size, unsigned long val,
2041 bool neg)
2042 {
2043 int len;
2044 char tmp[TMPBUFLEN], *p = tmp;
2045
2046 sprintf(p, "%s%lu", neg ? "-" : "", val);
2047 len = strlen(tmp);
2048 if (len > *size)
2049 len = *size;
2050 if (copy_to_user(*buf, tmp, len))
2051 return -EFAULT;
2052 *size -= len;
2053 *buf += len;
2054 return 0;
2055 }
2056 #undef TMPBUFLEN
2057
2058 static int proc_put_char(void __user **buf, size_t *size, char c)
2059 {
2060 if (*size) {
2061 char __user **buffer = (char __user **)buf;
2062 if (put_user(c, *buffer))
2063 return -EFAULT;
2064 (*size)--, (*buffer)++;
2065 *buf = *buffer;
2066 }
2067 return 0;
2068 }
2069
2070 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
2071 int *valp,
2072 int write, void *data)
2073 {
2074 if (write) {
2075 if (*negp) {
2076 if (*lvalp > (unsigned long) INT_MAX + 1)
2077 return -EINVAL;
2078 *valp = -*lvalp;
2079 } else {
2080 if (*lvalp > (unsigned long) INT_MAX)
2081 return -EINVAL;
2082 *valp = *lvalp;
2083 }
2084 } else {
2085 int val = *valp;
2086 if (val < 0) {
2087 *negp = true;
2088 *lvalp = -(unsigned long)val;
2089 } else {
2090 *negp = false;
2091 *lvalp = (unsigned long)val;
2092 }
2093 }
2094 return 0;
2095 }
2096
2097 static int do_proc_douintvec_conv(bool *negp, unsigned long *lvalp,
2098 int *valp,
2099 int write, void *data)
2100 {
2101 if (write) {
2102 if (*negp)
2103 return -EINVAL;
2104 *valp = *lvalp;
2105 } else {
2106 unsigned int val = *valp;
2107 *lvalp = (unsigned long)val;
2108 }
2109 return 0;
2110 }
2111
2112 static const char proc_wspace_sep[] = { ' ', '\t', '\n' };
2113
2114 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
2115 int write, void __user *buffer,
2116 size_t *lenp, loff_t *ppos,
2117 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2118 int write, void *data),
2119 void *data)
2120 {
2121 int *i, vleft, first = 1, err = 0;
2122 unsigned long page = 0;
2123 size_t left;
2124 char *kbuf;
2125
2126 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {
2127 *lenp = 0;
2128 return 0;
2129 }
2130
2131 i = (int *) tbl_data;
2132 vleft = table->maxlen / sizeof(*i);
2133 left = *lenp;
2134
2135 if (!conv)
2136 conv = do_proc_dointvec_conv;
2137
2138 if (write) {
2139 if (*ppos) {
2140 switch (sysctl_writes_strict) {
2141 case SYSCTL_WRITES_STRICT:
2142 goto out;
2143 case SYSCTL_WRITES_WARN:
2144 warn_sysctl_write(table);
2145 break;
2146 default:
2147 break;
2148 }
2149 }
2150
2151 if (left > PAGE_SIZE - 1)
2152 left = PAGE_SIZE - 1;
2153 page = __get_free_page(GFP_TEMPORARY);
2154 kbuf = (char *) page;
2155 if (!kbuf)
2156 return -ENOMEM;
2157 if (copy_from_user(kbuf, buffer, left)) {
2158 err = -EFAULT;
2159 goto free;
2160 }
2161 kbuf[left] = 0;
2162 }
2163
2164 for (; left && vleft--; i++, first=0) {
2165 unsigned long lval;
2166 bool neg;
2167
2168 if (write) {
2169 left -= proc_skip_spaces(&kbuf);
2170
2171 if (!left)
2172 break;
2173 err = proc_get_long(&kbuf, &left, &lval, &neg,
2174 proc_wspace_sep,
2175 sizeof(proc_wspace_sep), NULL);
2176 if (err)
2177 break;
2178 if (conv(&neg, &lval, i, 1, data)) {
2179 err = -EINVAL;
2180 break;
2181 }
2182 } else {
2183 if (conv(&neg, &lval, i, 0, data)) {
2184 err = -EINVAL;
2185 break;
2186 }
2187 if (!first)
2188 err = proc_put_char(&buffer, &left, '\t');
2189 if (err)
2190 break;
2191 err = proc_put_long(&buffer, &left, lval, neg);
2192 if (err)
2193 break;
2194 }
2195 }
2196
2197 if (!write && !first && left && !err)
2198 err = proc_put_char(&buffer, &left, '\n');
2199 if (write && !err && left)
2200 left -= proc_skip_spaces(&kbuf);
2201 free:
2202 if (write) {
2203 free_page(page);
2204 if (first)
2205 return err ? : -EINVAL;
2206 }
2207 *lenp -= left;
2208 out:
2209 *ppos += *lenp;
2210 return err;
2211 }
2212
2213 static int do_proc_dointvec(struct ctl_table *table, int write,
2214 void __user *buffer, size_t *lenp, loff_t *ppos,
2215 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
2216 int write, void *data),
2217 void *data)
2218 {
2219 return __do_proc_dointvec(table->data, table, write,
2220 buffer, lenp, ppos, conv, data);
2221 }
2222
2223 /**
2224 * proc_dointvec - read a vector of integers
2225 * @table: the sysctl table
2226 * @write: %TRUE if this is a write to the sysctl file
2227 * @buffer: the user buffer
2228 * @lenp: the size of the user buffer
2229 * @ppos: file position
2230 *
2231 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2232 * values from/to the user buffer, treated as an ASCII string.
2233 *
2234 * Returns 0 on success.
2235 */
2236 int proc_dointvec(struct ctl_table *table, int write,
2237 void __user *buffer, size_t *lenp, loff_t *ppos)
2238 {
2239 return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL);
2240 }
2241
2242 /**
2243 * proc_douintvec - read a vector of unsigned integers
2244 * @table: the sysctl table
2245 * @write: %TRUE if this is a write to the sysctl file
2246 * @buffer: the user buffer
2247 * @lenp: the size of the user buffer
2248 * @ppos: file position
2249 *
2250 * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer
2251 * values from/to the user buffer, treated as an ASCII string.
2252 *
2253 * Returns 0 on success.
2254 */
2255 int proc_douintvec(struct ctl_table *table, int write,
2256 void __user *buffer, size_t *lenp, loff_t *ppos)
2257 {
2258 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2259 do_proc_douintvec_conv, NULL);
2260 }
2261
2262 /*
2263 * Taint values can only be increased
2264 * This means we can safely use a temporary.
2265 */
2266 static int proc_taint(struct ctl_table *table, int write,
2267 void __user *buffer, size_t *lenp, loff_t *ppos)
2268 {
2269 struct ctl_table t;
2270 unsigned long tmptaint = get_taint();
2271 int err;
2272
2273 if (write && !capable(CAP_SYS_ADMIN))
2274 return -EPERM;
2275
2276 t = *table;
2277 t.data = &tmptaint;
2278 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);
2279 if (err < 0)
2280 return err;
2281
2282 if (write) {
2283 /*
2284 * Poor man's atomic or. Not worth adding a primitive
2285 * to everyone's atomic.h for this
2286 */
2287 int i;
2288 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
2289 if ((tmptaint >> i) & 1)
2290 add_taint(i, LOCKDEP_STILL_OK);
2291 }
2292 }
2293
2294 return err;
2295 }
2296
2297 #ifdef CONFIG_PRINTK
2298 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
2299 void __user *buffer, size_t *lenp, loff_t *ppos)
2300 {
2301 if (write && !capable(CAP_SYS_ADMIN))
2302 return -EPERM;
2303
2304 return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
2305 }
2306 #endif
2307
2308 struct do_proc_dointvec_minmax_conv_param {
2309 int *min;
2310 int *max;
2311 };
2312
2313 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp,
2314 int *valp,
2315 int write, void *data)
2316 {
2317 struct do_proc_dointvec_minmax_conv_param *param = data;
2318 if (write) {
2319 int val = *negp ? -*lvalp : *lvalp;
2320 if ((param->min && *param->min > val) ||
2321 (param->max && *param->max < val))
2322 return -EINVAL;
2323 *valp = val;
2324 } else {
2325 int val = *valp;
2326 if (val < 0) {
2327 *negp = true;
2328 *lvalp = -(unsigned long)val;
2329 } else {
2330 *negp = false;
2331 *lvalp = (unsigned long)val;
2332 }
2333 }
2334 return 0;
2335 }
2336
2337 /**
2338 * proc_dointvec_minmax - read a vector of integers with min/max values
2339 * @table: the sysctl table
2340 * @write: %TRUE if this is a write to the sysctl file
2341 * @buffer: the user buffer
2342 * @lenp: the size of the user buffer
2343 * @ppos: file position
2344 *
2345 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2346 * values from/to the user buffer, treated as an ASCII string.
2347 *
2348 * This routine will ensure the values are within the range specified by
2349 * table->extra1 (min) and table->extra2 (max).
2350 *
2351 * Returns 0 on success.
2352 */
2353 int proc_dointvec_minmax(struct ctl_table *table, int write,
2354 void __user *buffer, size_t *lenp, loff_t *ppos)
2355 {
2356 struct do_proc_dointvec_minmax_conv_param param = {
2357 .min = (int *) table->extra1,
2358 .max = (int *) table->extra2,
2359 };
2360 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2361 do_proc_dointvec_minmax_conv, &param);
2362 }
2363
2364 static void validate_coredump_safety(void)
2365 {
2366 #ifdef CONFIG_COREDUMP
2367 if (suid_dumpable == SUID_DUMP_ROOT &&
2368 core_pattern[0] != '/' && core_pattern[0] != '|') {
2369 printk(KERN_WARNING "Unsafe core_pattern used with "\
2370 "suid_dumpable=2. Pipe handler or fully qualified "\
2371 "core dump path required.\n");
2372 }
2373 #endif
2374 }
2375
2376 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
2377 void __user *buffer, size_t *lenp, loff_t *ppos)
2378 {
2379 int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
2380 if (!error)
2381 validate_coredump_safety();
2382 return error;
2383 }
2384
2385 #ifdef CONFIG_COREDUMP
2386 static int proc_dostring_coredump(struct ctl_table *table, int write,
2387 void __user *buffer, size_t *lenp, loff_t *ppos)
2388 {
2389 int error = proc_dostring(table, write, buffer, lenp, ppos);
2390 if (!error)
2391 validate_coredump_safety();
2392 return error;
2393 }
2394 #endif
2395
2396 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,
2397 void __user *buffer,
2398 size_t *lenp, loff_t *ppos,
2399 unsigned long convmul,
2400 unsigned long convdiv)
2401 {
2402 unsigned long *i, *min, *max;
2403 int vleft, first = 1, err = 0;
2404 unsigned long page = 0;
2405 size_t left;
2406 char *kbuf;
2407
2408 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {
2409 *lenp = 0;
2410 return 0;
2411 }
2412
2413 i = (unsigned long *) data;
2414 min = (unsigned long *) table->extra1;
2415 max = (unsigned long *) table->extra2;
2416 vleft = table->maxlen / sizeof(unsigned long);
2417 left = *lenp;
2418
2419 if (write) {
2420 if (*ppos) {
2421 switch (sysctl_writes_strict) {
2422 case SYSCTL_WRITES_STRICT:
2423 goto out;
2424 case SYSCTL_WRITES_WARN:
2425 warn_sysctl_write(table);
2426 break;
2427 default:
2428 break;
2429 }
2430 }
2431
2432 if (left > PAGE_SIZE - 1)
2433 left = PAGE_SIZE - 1;
2434 page = __get_free_page(GFP_TEMPORARY);
2435 kbuf = (char *) page;
2436 if (!kbuf)
2437 return -ENOMEM;
2438 if (copy_from_user(kbuf, buffer, left)) {
2439 err = -EFAULT;
2440 goto free;
2441 }
2442 kbuf[left] = 0;
2443 }
2444
2445 for (; left && vleft--; i++, first = 0) {
2446 unsigned long val;
2447
2448 if (write) {
2449 bool neg;
2450
2451 left -= proc_skip_spaces(&kbuf);
2452
2453 err = proc_get_long(&kbuf, &left, &val, &neg,
2454 proc_wspace_sep,
2455 sizeof(proc_wspace_sep), NULL);
2456 if (err)
2457 break;
2458 if (neg)
2459 continue;
2460 if ((min && val < *min) || (max && val > *max))
2461 continue;
2462 *i = val;
2463 } else {
2464 val = convdiv * (*i) / convmul;
2465 if (!first) {
2466 err = proc_put_char(&buffer, &left, '\t');
2467 if (err)
2468 break;
2469 }
2470 err = proc_put_long(&buffer, &left, val, false);
2471 if (err)
2472 break;
2473 }
2474 }
2475
2476 if (!write && !first && left && !err)
2477 err = proc_put_char(&buffer, &left, '\n');
2478 if (write && !err)
2479 left -= proc_skip_spaces(&kbuf);
2480 free:
2481 if (write) {
2482 free_page(page);
2483 if (first)
2484 return err ? : -EINVAL;
2485 }
2486 *lenp -= left;
2487 out:
2488 *ppos += *lenp;
2489 return err;
2490 }
2491
2492 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
2493 void __user *buffer,
2494 size_t *lenp, loff_t *ppos,
2495 unsigned long convmul,
2496 unsigned long convdiv)
2497 {
2498 return __do_proc_doulongvec_minmax(table->data, table, write,
2499 buffer, lenp, ppos, convmul, convdiv);
2500 }
2501
2502 /**
2503 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2504 * @table: the sysctl table
2505 * @write: %TRUE if this is a write to the sysctl file
2506 * @buffer: the user buffer
2507 * @lenp: the size of the user buffer
2508 * @ppos: file position
2509 *
2510 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2511 * values from/to the user buffer, treated as an ASCII string.
2512 *
2513 * This routine will ensure the values are within the range specified by
2514 * table->extra1 (min) and table->extra2 (max).
2515 *
2516 * Returns 0 on success.
2517 */
2518 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2519 void __user *buffer, size_t *lenp, loff_t *ppos)
2520 {
2521 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);
2522 }
2523
2524 /**
2525 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values 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. The values
2534 * are treated as milliseconds, and converted to jiffies when they are stored.
2535 *
2536 * This routine will ensure the values are within the range specified by
2537 * table->extra1 (min) and table->extra2 (max).
2538 *
2539 * Returns 0 on success.
2540 */
2541 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2542 void __user *buffer,
2543 size_t *lenp, loff_t *ppos)
2544 {
2545 return do_proc_doulongvec_minmax(table, write, buffer,
2546 lenp, ppos, HZ, 1000l);
2547 }
2548
2549
2550 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp,
2551 int *valp,
2552 int write, void *data)
2553 {
2554 if (write) {
2555 if (*lvalp > LONG_MAX / HZ)
2556 return 1;
2557 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
2558 } else {
2559 int val = *valp;
2560 unsigned long lval;
2561 if (val < 0) {
2562 *negp = true;
2563 lval = -(unsigned long)val;
2564 } else {
2565 *negp = false;
2566 lval = (unsigned long)val;
2567 }
2568 *lvalp = lval / HZ;
2569 }
2570 return 0;
2571 }
2572
2573 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp,
2574 int *valp,
2575 int write, void *data)
2576 {
2577 if (write) {
2578 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
2579 return 1;
2580 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
2581 } else {
2582 int val = *valp;
2583 unsigned long lval;
2584 if (val < 0) {
2585 *negp = true;
2586 lval = -(unsigned long)val;
2587 } else {
2588 *negp = false;
2589 lval = (unsigned long)val;
2590 }
2591 *lvalp = jiffies_to_clock_t(lval);
2592 }
2593 return 0;
2594 }
2595
2596 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp,
2597 int *valp,
2598 int write, void *data)
2599 {
2600 if (write) {
2601 unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
2602
2603 if (jif > INT_MAX)
2604 return 1;
2605 *valp = (int)jif;
2606 } else {
2607 int val = *valp;
2608 unsigned long lval;
2609 if (val < 0) {
2610 *negp = true;
2611 lval = -(unsigned long)val;
2612 } else {
2613 *negp = false;
2614 lval = (unsigned long)val;
2615 }
2616 *lvalp = jiffies_to_msecs(lval);
2617 }
2618 return 0;
2619 }
2620
2621 /**
2622 * proc_dointvec_jiffies - read a vector of integers as seconds
2623 * @table: the sysctl table
2624 * @write: %TRUE if this is a write to the sysctl file
2625 * @buffer: the user buffer
2626 * @lenp: the size of the user buffer
2627 * @ppos: file position
2628 *
2629 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2630 * values from/to the user buffer, treated as an ASCII string.
2631 * The values read are assumed to be in seconds, and are converted into
2632 * jiffies.
2633 *
2634 * Returns 0 on success.
2635 */
2636 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2637 void __user *buffer, size_t *lenp, loff_t *ppos)
2638 {
2639 return do_proc_dointvec(table,write,buffer,lenp,ppos,
2640 do_proc_dointvec_jiffies_conv,NULL);
2641 }
2642
2643 /**
2644 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ 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: pointer to the 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 1/USER_HZ seconds, and
2654 * are converted into jiffies.
2655 *
2656 * Returns 0 on success.
2657 */
2658 int proc_dointvec_userhz_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_userhz_jiffies_conv,NULL);
2663 }
2664
2665 /**
2666 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
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: file position
2672 * @ppos: the current position in the file
2673 *
2674 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2675 * values from/to the user buffer, treated as an ASCII string.
2676 * The values read are assumed to be in 1/1000 seconds, and
2677 * are converted into jiffies.
2678 *
2679 * Returns 0 on success.
2680 */
2681 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2682 void __user *buffer, size_t *lenp, loff_t *ppos)
2683 {
2684 return do_proc_dointvec(table, write, buffer, lenp, ppos,
2685 do_proc_dointvec_ms_jiffies_conv, NULL);
2686 }
2687
2688 static int proc_do_cad_pid(struct ctl_table *table, int write,
2689 void __user *buffer, size_t *lenp, loff_t *ppos)
2690 {
2691 struct pid *new_pid;
2692 pid_t tmp;
2693 int r;
2694
2695 tmp = pid_vnr(cad_pid);
2696
2697 r = __do_proc_dointvec(&tmp, table, write, buffer,
2698 lenp, ppos, NULL, NULL);
2699 if (r || !write)
2700 return r;
2701
2702 new_pid = find_get_pid(tmp);
2703 if (!new_pid)
2704 return -ESRCH;
2705
2706 put_pid(xchg(&cad_pid, new_pid));
2707 return 0;
2708 }
2709
2710 /**
2711 * proc_do_large_bitmap - read/write from/to a large bitmap
2712 * @table: the sysctl table
2713 * @write: %TRUE if this is a write to the sysctl file
2714 * @buffer: the user buffer
2715 * @lenp: the size of the user buffer
2716 * @ppos: file position
2717 *
2718 * The bitmap is stored at table->data and the bitmap length (in bits)
2719 * in table->maxlen.
2720 *
2721 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
2722 * large bitmaps may be represented in a compact manner. Writing into
2723 * the file will clear the bitmap then update it with the given input.
2724 *
2725 * Returns 0 on success.
2726 */
2727 int proc_do_large_bitmap(struct ctl_table *table, int write,
2728 void __user *buffer, size_t *lenp, loff_t *ppos)
2729 {
2730 int err = 0;
2731 bool first = 1;
2732 size_t left = *lenp;
2733 unsigned long bitmap_len = table->maxlen;
2734 unsigned long *bitmap = *(unsigned long **) table->data;
2735 unsigned long *tmp_bitmap = NULL;
2736 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c;
2737
2738 if (!bitmap || !bitmap_len || !left || (*ppos && !write)) {
2739 *lenp = 0;
2740 return 0;
2741 }
2742
2743 if (write) {
2744 unsigned long page = 0;
2745 char *kbuf;
2746
2747 if (left > PAGE_SIZE - 1)
2748 left = PAGE_SIZE - 1;
2749
2750 page = __get_free_page(GFP_TEMPORARY);
2751 kbuf = (char *) page;
2752 if (!kbuf)
2753 return -ENOMEM;
2754 if (copy_from_user(kbuf, buffer, left)) {
2755 free_page(page);
2756 return -EFAULT;
2757 }
2758 kbuf[left] = 0;
2759
2760 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long),
2761 GFP_KERNEL);
2762 if (!tmp_bitmap) {
2763 free_page(page);
2764 return -ENOMEM;
2765 }
2766 proc_skip_char(&kbuf, &left, '\n');
2767 while (!err && left) {
2768 unsigned long val_a, val_b;
2769 bool neg;
2770
2771 err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a,
2772 sizeof(tr_a), &c);
2773 if (err)
2774 break;
2775 if (val_a >= bitmap_len || neg) {
2776 err = -EINVAL;
2777 break;
2778 }
2779
2780 val_b = val_a;
2781 if (left) {
2782 kbuf++;
2783 left--;
2784 }
2785
2786 if (c == '-') {
2787 err = proc_get_long(&kbuf, &left, &val_b,
2788 &neg, tr_b, sizeof(tr_b),
2789 &c);
2790 if (err)
2791 break;
2792 if (val_b >= bitmap_len || neg ||
2793 val_a > val_b) {
2794 err = -EINVAL;
2795 break;
2796 }
2797 if (left) {
2798 kbuf++;
2799 left--;
2800 }
2801 }
2802
2803 bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
2804 first = 0;
2805 proc_skip_char(&kbuf, &left, '\n');
2806 }
2807 free_page(page);
2808 } else {
2809 unsigned long bit_a, bit_b = 0;
2810
2811 while (left) {
2812 bit_a = find_next_bit(bitmap, bitmap_len, bit_b);
2813 if (bit_a >= bitmap_len)
2814 break;
2815 bit_b = find_next_zero_bit(bitmap, bitmap_len,
2816 bit_a + 1) - 1;
2817
2818 if (!first) {
2819 err = proc_put_char(&buffer, &left, ',');
2820 if (err)
2821 break;
2822 }
2823 err = proc_put_long(&buffer, &left, bit_a, false);
2824 if (err)
2825 break;
2826 if (bit_a != bit_b) {
2827 err = proc_put_char(&buffer, &left, '-');
2828 if (err)
2829 break;
2830 err = proc_put_long(&buffer, &left, bit_b, false);
2831 if (err)
2832 break;
2833 }
2834
2835 first = 0; bit_b++;
2836 }
2837 if (!err)
2838 err = proc_put_char(&buffer, &left, '\n');
2839 }
2840
2841 if (!err) {
2842 if (write) {
2843 if (*ppos)
2844 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
2845 else
2846 bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
2847 }
2848 kfree(tmp_bitmap);
2849 *lenp -= left;
2850 *ppos += *lenp;
2851 return 0;
2852 } else {
2853 kfree(tmp_bitmap);
2854 return err;
2855 }
2856 }
2857
2858 #else /* CONFIG_PROC_SYSCTL */
2859
2860 int proc_dostring(struct ctl_table *table, int write,
2861 void __user *buffer, size_t *lenp, loff_t *ppos)
2862 {
2863 return -ENOSYS;
2864 }
2865
2866 int proc_dointvec(struct ctl_table *table, int write,
2867 void __user *buffer, size_t *lenp, loff_t *ppos)
2868 {
2869 return -ENOSYS;
2870 }
2871
2872 int proc_douintvec(struct ctl_table *table, int write,
2873 void __user *buffer, size_t *lenp, loff_t *ppos)
2874 {
2875 return -ENOSYS;
2876 }
2877
2878 int proc_dointvec_minmax(struct ctl_table *table, int write,
2879 void __user *buffer, size_t *lenp, loff_t *ppos)
2880 {
2881 return -ENOSYS;
2882 }
2883
2884 int proc_dointvec_jiffies(struct ctl_table *table, int write,
2885 void __user *buffer, size_t *lenp, loff_t *ppos)
2886 {
2887 return -ENOSYS;
2888 }
2889
2890 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
2891 void __user *buffer, size_t *lenp, loff_t *ppos)
2892 {
2893 return -ENOSYS;
2894 }
2895
2896 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
2897 void __user *buffer, size_t *lenp, loff_t *ppos)
2898 {
2899 return -ENOSYS;
2900 }
2901
2902 int proc_doulongvec_minmax(struct ctl_table *table, int write,
2903 void __user *buffer, size_t *lenp, loff_t *ppos)
2904 {
2905 return -ENOSYS;
2906 }
2907
2908 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
2909 void __user *buffer,
2910 size_t *lenp, loff_t *ppos)
2911 {
2912 return -ENOSYS;
2913 }
2914
2915
2916 #endif /* CONFIG_PROC_SYSCTL */
2917
2918 /*
2919 * No sense putting this after each symbol definition, twice,
2920 * exception granted :-)
2921 */
2922 EXPORT_SYMBOL(proc_dointvec);
2923 EXPORT_SYMBOL(proc_douintvec);
2924 EXPORT_SYMBOL(proc_dointvec_jiffies);
2925 EXPORT_SYMBOL(proc_dointvec_minmax);
2926 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
2927 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
2928 EXPORT_SYMBOL(proc_dostring);
2929 EXPORT_SYMBOL(proc_doulongvec_minmax);
2930 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
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