2 * sysctl.c: General linux system control interface
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
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
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
21 #include <linux/module.h>
22 #include <linux/aio.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>
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>
69 #include <asm/uaccess.h>
70 #include <asm/processor.h>
74 #include <asm/stacktrace.h>
78 #include <asm/setup.h>
80 #ifdef CONFIG_BSD_PROCESS_ACCT
81 #include <linux/acct.h>
83 #ifdef CONFIG_RT_MUTEXES
84 #include <linux/rtmutex.h>
86 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT)
87 #include <linux/lockdep.h>
89 #ifdef CONFIG_CHR_DEV_SG
93 #ifdef CONFIG_LOCKUP_DETECTOR
94 #include <linux/nmi.h>
97 #if defined(CONFIG_SYSCTL)
99 /* External variables not in a header file. */
100 extern int suid_dumpable
;
101 #ifdef CONFIG_COREDUMP
102 extern int core_uses_pid
;
103 extern char core_pattern
[];
104 extern unsigned int core_pipe_limit
;
107 extern int pid_max_min
, pid_max_max
;
108 extern int percpu_pagelist_fraction
;
109 extern int compat_log
;
110 extern int latencytop_enabled
;
111 extern int sysctl_nr_open_min
, sysctl_nr_open_max
;
113 extern int sysctl_nr_trim_pages
;
116 /* Constants used for minimum and maximum */
117 #ifdef CONFIG_LOCKUP_DETECTOR
118 static int sixty
= 60;
121 static int __maybe_unused neg_one
= -1;
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;
130 static int ten_thousand
= 10000;
133 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
134 static unsigned long dirty_bytes_min
= 2 * PAGE_SIZE
;
136 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
137 static int maxolduid
= 65535;
138 static int minolduid
;
140 static int ngroups_max
= NGROUPS_MAX
;
141 static const int cap_last_cap
= CAP_LAST_CAP
;
143 /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */
144 #ifdef CONFIG_DETECT_HUNG_TASK
145 static unsigned long hung_task_timeout_max
= (LONG_MAX
/HZ
);
148 #ifdef CONFIG_INOTIFY_USER
149 #include <linux/inotify.h>
155 extern int pwrsw_enabled
;
158 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
159 extern int unaligned_enabled
;
163 extern int unaligned_dump_stack
;
166 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
167 extern int no_unaligned_warning
;
170 #ifdef CONFIG_PROC_SYSCTL
172 #define SYSCTL_WRITES_LEGACY -1
173 #define SYSCTL_WRITES_WARN 0
174 #define SYSCTL_WRITES_STRICT 1
176 static int sysctl_writes_strict
= SYSCTL_WRITES_STRICT
;
178 static int proc_do_cad_pid(struct ctl_table
*table
, int write
,
179 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
180 static int proc_taint(struct ctl_table
*table
, int write
,
181 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
185 static int proc_dointvec_minmax_sysadmin(struct ctl_table
*table
, int write
,
186 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
189 static int proc_dointvec_minmax_coredump(struct ctl_table
*table
, int write
,
190 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
191 #ifdef CONFIG_COREDUMP
192 static int proc_dostring_coredump(struct ctl_table
*table
, int write
,
193 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
);
196 #ifdef CONFIG_MAGIC_SYSRQ
197 /* Note: sysrq code uses it's own private copy */
198 static int __sysrq_enabled
= CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE
;
200 static int sysrq_sysctl_handler(struct ctl_table
*table
, int write
,
201 void __user
*buffer
, size_t *lenp
,
206 error
= proc_dointvec(table
, write
, buffer
, lenp
, ppos
);
211 sysrq_toggle_support(__sysrq_enabled
);
218 static struct ctl_table kern_table
[];
219 static struct ctl_table vm_table
[];
220 static struct ctl_table fs_table
[];
221 static struct ctl_table debug_table
[];
222 static struct ctl_table dev_table
[];
223 extern struct ctl_table random_table
[];
225 extern struct ctl_table epoll_table
[];
228 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
229 int sysctl_legacy_va_layout
;
232 /* The default sysctl tables: */
234 static struct ctl_table sysctl_base_table
[] = {
236 .procname
= "kernel",
253 .child
= debug_table
,
263 #ifdef CONFIG_SCHED_DEBUG
264 static int min_sched_granularity_ns
= 100000; /* 100 usecs */
265 static int max_sched_granularity_ns
= NSEC_PER_SEC
; /* 1 second */
266 static int min_wakeup_granularity_ns
; /* 0 usecs */
267 static int max_wakeup_granularity_ns
= NSEC_PER_SEC
; /* 1 second */
269 static int min_sched_tunable_scaling
= SCHED_TUNABLESCALING_NONE
;
270 static int max_sched_tunable_scaling
= SCHED_TUNABLESCALING_END
-1;
271 #endif /* CONFIG_SMP */
272 #endif /* CONFIG_SCHED_DEBUG */
274 #ifdef CONFIG_COMPACTION
275 static int min_extfrag_threshold
;
276 static int max_extfrag_threshold
= 1000;
279 static struct ctl_table kern_table
[] = {
281 .procname
= "sched_child_runs_first",
282 .data
= &sysctl_sched_child_runs_first
,
283 .maxlen
= sizeof(unsigned int),
285 .proc_handler
= proc_dointvec
,
287 #ifdef CONFIG_SCHED_DEBUG
289 .procname
= "sched_min_granularity_ns",
290 .data
= &sysctl_sched_min_granularity
,
291 .maxlen
= sizeof(unsigned int),
293 .proc_handler
= sched_proc_update_handler
,
294 .extra1
= &min_sched_granularity_ns
,
295 .extra2
= &max_sched_granularity_ns
,
298 .procname
= "sched_latency_ns",
299 .data
= &sysctl_sched_latency
,
300 .maxlen
= sizeof(unsigned int),
302 .proc_handler
= sched_proc_update_handler
,
303 .extra1
= &min_sched_granularity_ns
,
304 .extra2
= &max_sched_granularity_ns
,
307 .procname
= "sched_wakeup_granularity_ns",
308 .data
= &sysctl_sched_wakeup_granularity
,
309 .maxlen
= sizeof(unsigned int),
311 .proc_handler
= sched_proc_update_handler
,
312 .extra1
= &min_wakeup_granularity_ns
,
313 .extra2
= &max_wakeup_granularity_ns
,
317 .procname
= "sched_tunable_scaling",
318 .data
= &sysctl_sched_tunable_scaling
,
319 .maxlen
= sizeof(enum sched_tunable_scaling
),
321 .proc_handler
= sched_proc_update_handler
,
322 .extra1
= &min_sched_tunable_scaling
,
323 .extra2
= &max_sched_tunable_scaling
,
326 .procname
= "sched_migration_cost_ns",
327 .data
= &sysctl_sched_migration_cost
,
328 .maxlen
= sizeof(unsigned int),
330 .proc_handler
= proc_dointvec
,
333 .procname
= "sched_nr_migrate",
334 .data
= &sysctl_sched_nr_migrate
,
335 .maxlen
= sizeof(unsigned int),
337 .proc_handler
= proc_dointvec
,
340 .procname
= "sched_time_avg_ms",
341 .data
= &sysctl_sched_time_avg
,
342 .maxlen
= sizeof(unsigned int),
344 .proc_handler
= proc_dointvec
,
347 .procname
= "sched_shares_window_ns",
348 .data
= &sysctl_sched_shares_window
,
349 .maxlen
= sizeof(unsigned int),
351 .proc_handler
= proc_dointvec
,
353 #ifdef CONFIG_SCHEDSTATS
355 .procname
= "sched_schedstats",
357 .maxlen
= sizeof(unsigned int),
359 .proc_handler
= sysctl_schedstats
,
363 #endif /* CONFIG_SCHEDSTATS */
364 #endif /* CONFIG_SMP */
365 #ifdef CONFIG_NUMA_BALANCING
367 .procname
= "numa_balancing_scan_delay_ms",
368 .data
= &sysctl_numa_balancing_scan_delay
,
369 .maxlen
= sizeof(unsigned int),
371 .proc_handler
= proc_dointvec
,
374 .procname
= "numa_balancing_scan_period_min_ms",
375 .data
= &sysctl_numa_balancing_scan_period_min
,
376 .maxlen
= sizeof(unsigned int),
378 .proc_handler
= proc_dointvec
,
381 .procname
= "numa_balancing_scan_period_max_ms",
382 .data
= &sysctl_numa_balancing_scan_period_max
,
383 .maxlen
= sizeof(unsigned int),
385 .proc_handler
= proc_dointvec
,
388 .procname
= "numa_balancing_scan_size_mb",
389 .data
= &sysctl_numa_balancing_scan_size
,
390 .maxlen
= sizeof(unsigned int),
392 .proc_handler
= proc_dointvec_minmax
,
396 .procname
= "numa_balancing",
397 .data
= NULL
, /* filled in by handler */
398 .maxlen
= sizeof(unsigned int),
400 .proc_handler
= sysctl_numa_balancing
,
404 #endif /* CONFIG_NUMA_BALANCING */
405 #endif /* CONFIG_SCHED_DEBUG */
407 .procname
= "sched_rt_period_us",
408 .data
= &sysctl_sched_rt_period
,
409 .maxlen
= sizeof(unsigned int),
411 .proc_handler
= sched_rt_handler
,
414 .procname
= "sched_rt_runtime_us",
415 .data
= &sysctl_sched_rt_runtime
,
416 .maxlen
= sizeof(int),
418 .proc_handler
= sched_rt_handler
,
421 .procname
= "sched_rr_timeslice_ms",
422 .data
= &sched_rr_timeslice
,
423 .maxlen
= sizeof(int),
425 .proc_handler
= sched_rr_handler
,
427 #ifdef CONFIG_SCHED_AUTOGROUP
429 .procname
= "sched_autogroup_enabled",
430 .data
= &sysctl_sched_autogroup_enabled
,
431 .maxlen
= sizeof(unsigned int),
433 .proc_handler
= proc_dointvec_minmax
,
438 #ifdef CONFIG_CFS_BANDWIDTH
440 .procname
= "sched_cfs_bandwidth_slice_us",
441 .data
= &sysctl_sched_cfs_bandwidth_slice
,
442 .maxlen
= sizeof(unsigned int),
444 .proc_handler
= proc_dointvec_minmax
,
448 #ifdef CONFIG_PROVE_LOCKING
450 .procname
= "prove_locking",
451 .data
= &prove_locking
,
452 .maxlen
= sizeof(int),
454 .proc_handler
= proc_dointvec
,
457 #ifdef CONFIG_LOCK_STAT
459 .procname
= "lock_stat",
461 .maxlen
= sizeof(int),
463 .proc_handler
= proc_dointvec
,
468 .data
= &panic_timeout
,
469 .maxlen
= sizeof(int),
471 .proc_handler
= proc_dointvec
,
473 #ifdef CONFIG_COREDUMP
475 .procname
= "core_uses_pid",
476 .data
= &core_uses_pid
,
477 .maxlen
= sizeof(int),
479 .proc_handler
= proc_dointvec
,
482 .procname
= "core_pattern",
483 .data
= core_pattern
,
484 .maxlen
= CORENAME_MAX_SIZE
,
486 .proc_handler
= proc_dostring_coredump
,
489 .procname
= "core_pipe_limit",
490 .data
= &core_pipe_limit
,
491 .maxlen
= sizeof(unsigned int),
493 .proc_handler
= proc_dointvec
,
496 #ifdef CONFIG_PROC_SYSCTL
498 .procname
= "tainted",
499 .maxlen
= sizeof(long),
501 .proc_handler
= proc_taint
,
504 .procname
= "sysctl_writes_strict",
505 .data
= &sysctl_writes_strict
,
506 .maxlen
= sizeof(int),
508 .proc_handler
= proc_dointvec_minmax
,
513 #ifdef CONFIG_LATENCYTOP
515 .procname
= "latencytop",
516 .data
= &latencytop_enabled
,
517 .maxlen
= sizeof(int),
519 .proc_handler
= sysctl_latencytop
,
522 #ifdef CONFIG_BLK_DEV_INITRD
524 .procname
= "real-root-dev",
525 .data
= &real_root_dev
,
526 .maxlen
= sizeof(int),
528 .proc_handler
= proc_dointvec
,
532 .procname
= "print-fatal-signals",
533 .data
= &print_fatal_signals
,
534 .maxlen
= sizeof(int),
536 .proc_handler
= proc_dointvec
,
540 .procname
= "reboot-cmd",
541 .data
= reboot_command
,
544 .proc_handler
= proc_dostring
,
547 .procname
= "stop-a",
548 .data
= &stop_a_enabled
,
549 .maxlen
= sizeof (int),
551 .proc_handler
= proc_dointvec
,
554 .procname
= "scons-poweroff",
555 .data
= &scons_pwroff
,
556 .maxlen
= sizeof (int),
558 .proc_handler
= proc_dointvec
,
561 #ifdef CONFIG_SPARC64
563 .procname
= "tsb-ratio",
564 .data
= &sysctl_tsb_ratio
,
565 .maxlen
= sizeof (int),
567 .proc_handler
= proc_dointvec
,
572 .procname
= "soft-power",
573 .data
= &pwrsw_enabled
,
574 .maxlen
= sizeof (int),
576 .proc_handler
= proc_dointvec
,
579 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
581 .procname
= "unaligned-trap",
582 .data
= &unaligned_enabled
,
583 .maxlen
= sizeof (int),
585 .proc_handler
= proc_dointvec
,
589 .procname
= "ctrl-alt-del",
591 .maxlen
= sizeof(int),
593 .proc_handler
= proc_dointvec
,
595 #ifdef CONFIG_FUNCTION_TRACER
597 .procname
= "ftrace_enabled",
598 .data
= &ftrace_enabled
,
599 .maxlen
= sizeof(int),
601 .proc_handler
= ftrace_enable_sysctl
,
604 #ifdef CONFIG_STACK_TRACER
606 .procname
= "stack_tracer_enabled",
607 .data
= &stack_tracer_enabled
,
608 .maxlen
= sizeof(int),
610 .proc_handler
= stack_trace_sysctl
,
613 #ifdef CONFIG_TRACING
615 .procname
= "ftrace_dump_on_oops",
616 .data
= &ftrace_dump_on_oops
,
617 .maxlen
= sizeof(int),
619 .proc_handler
= proc_dointvec
,
622 .procname
= "traceoff_on_warning",
623 .data
= &__disable_trace_on_warning
,
624 .maxlen
= sizeof(__disable_trace_on_warning
),
626 .proc_handler
= proc_dointvec
,
629 .procname
= "tracepoint_printk",
630 .data
= &tracepoint_printk
,
631 .maxlen
= sizeof(tracepoint_printk
),
633 .proc_handler
= proc_dointvec
,
636 #ifdef CONFIG_KEXEC_CORE
638 .procname
= "kexec_load_disabled",
639 .data
= &kexec_load_disabled
,
640 .maxlen
= sizeof(int),
642 /* only handle a transition from default "0" to "1" */
643 .proc_handler
= proc_dointvec_minmax
,
648 #ifdef CONFIG_MODULES
650 .procname
= "modprobe",
651 .data
= &modprobe_path
,
652 .maxlen
= KMOD_PATH_LEN
,
654 .proc_handler
= proc_dostring
,
657 .procname
= "modules_disabled",
658 .data
= &modules_disabled
,
659 .maxlen
= sizeof(int),
661 /* only handle a transition from default "0" to "1" */
662 .proc_handler
= proc_dointvec_minmax
,
667 #ifdef CONFIG_UEVENT_HELPER
669 .procname
= "hotplug",
670 .data
= &uevent_helper
,
671 .maxlen
= UEVENT_HELPER_PATH_LEN
,
673 .proc_handler
= proc_dostring
,
676 #ifdef CONFIG_CHR_DEV_SG
678 .procname
= "sg-big-buff",
679 .data
= &sg_big_buff
,
680 .maxlen
= sizeof (int),
682 .proc_handler
= proc_dointvec
,
685 #ifdef CONFIG_BSD_PROCESS_ACCT
689 .maxlen
= 3*sizeof(int),
691 .proc_handler
= proc_dointvec
,
694 #ifdef CONFIG_MAGIC_SYSRQ
697 .data
= &__sysrq_enabled
,
698 .maxlen
= sizeof (int),
700 .proc_handler
= sysrq_sysctl_handler
,
703 #ifdef CONFIG_PROC_SYSCTL
705 .procname
= "cad_pid",
707 .maxlen
= sizeof (int),
709 .proc_handler
= proc_do_cad_pid
,
713 .procname
= "threads-max",
715 .maxlen
= sizeof(int),
717 .proc_handler
= sysctl_max_threads
,
720 .procname
= "random",
722 .child
= random_table
,
725 .procname
= "usermodehelper",
727 .child
= usermodehelper_table
,
730 .procname
= "overflowuid",
731 .data
= &overflowuid
,
732 .maxlen
= sizeof(int),
734 .proc_handler
= proc_dointvec_minmax
,
735 .extra1
= &minolduid
,
736 .extra2
= &maxolduid
,
739 .procname
= "overflowgid",
740 .data
= &overflowgid
,
741 .maxlen
= sizeof(int),
743 .proc_handler
= proc_dointvec_minmax
,
744 .extra1
= &minolduid
,
745 .extra2
= &maxolduid
,
748 #ifdef CONFIG_MATHEMU
750 .procname
= "ieee_emulation_warnings",
751 .data
= &sysctl_ieee_emulation_warnings
,
752 .maxlen
= sizeof(int),
754 .proc_handler
= proc_dointvec
,
758 .procname
= "userprocess_debug",
759 .data
= &show_unhandled_signals
,
760 .maxlen
= sizeof(int),
762 .proc_handler
= proc_dointvec
,
766 .procname
= "pid_max",
768 .maxlen
= sizeof (int),
770 .proc_handler
= proc_dointvec_minmax
,
771 .extra1
= &pid_max_min
,
772 .extra2
= &pid_max_max
,
775 .procname
= "panic_on_oops",
776 .data
= &panic_on_oops
,
777 .maxlen
= sizeof(int),
779 .proc_handler
= proc_dointvec
,
781 #if defined CONFIG_PRINTK
783 .procname
= "printk",
784 .data
= &console_loglevel
,
785 .maxlen
= 4*sizeof(int),
787 .proc_handler
= proc_dointvec
,
790 .procname
= "printk_ratelimit",
791 .data
= &printk_ratelimit_state
.interval
,
792 .maxlen
= sizeof(int),
794 .proc_handler
= proc_dointvec_jiffies
,
797 .procname
= "printk_ratelimit_burst",
798 .data
= &printk_ratelimit_state
.burst
,
799 .maxlen
= sizeof(int),
801 .proc_handler
= proc_dointvec
,
804 .procname
= "printk_delay",
805 .data
= &printk_delay_msec
,
806 .maxlen
= sizeof(int),
808 .proc_handler
= proc_dointvec_minmax
,
810 .extra2
= &ten_thousand
,
813 .procname
= "dmesg_restrict",
814 .data
= &dmesg_restrict
,
815 .maxlen
= sizeof(int),
817 .proc_handler
= proc_dointvec_minmax_sysadmin
,
822 .procname
= "kptr_restrict",
823 .data
= &kptr_restrict
,
824 .maxlen
= sizeof(int),
826 .proc_handler
= proc_dointvec_minmax_sysadmin
,
832 .procname
= "ngroups_max",
833 .data
= &ngroups_max
,
834 .maxlen
= sizeof (int),
836 .proc_handler
= proc_dointvec
,
839 .procname
= "cap_last_cap",
840 .data
= (void *)&cap_last_cap
,
841 .maxlen
= sizeof(int),
843 .proc_handler
= proc_dointvec
,
845 #if defined(CONFIG_LOCKUP_DETECTOR)
847 .procname
= "watchdog",
848 .data
= &watchdog_user_enabled
,
849 .maxlen
= sizeof (int),
851 .proc_handler
= proc_watchdog
,
856 .procname
= "watchdog_thresh",
857 .data
= &watchdog_thresh
,
858 .maxlen
= sizeof(int),
860 .proc_handler
= proc_watchdog_thresh
,
865 .procname
= "nmi_watchdog",
866 .data
= &nmi_watchdog_enabled
,
867 .maxlen
= sizeof (int),
869 .proc_handler
= proc_nmi_watchdog
,
871 #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
878 .procname
= "soft_watchdog",
879 .data
= &soft_watchdog_enabled
,
880 .maxlen
= sizeof (int),
882 .proc_handler
= proc_soft_watchdog
,
887 .procname
= "watchdog_cpumask",
888 .data
= &watchdog_cpumask_bits
,
891 .proc_handler
= proc_watchdog_cpumask
,
894 .procname
= "softlockup_panic",
895 .data
= &softlockup_panic
,
896 .maxlen
= sizeof(int),
898 .proc_handler
= proc_dointvec_minmax
,
902 #ifdef CONFIG_HARDLOCKUP_DETECTOR
904 .procname
= "hardlockup_panic",
905 .data
= &hardlockup_panic
,
906 .maxlen
= sizeof(int),
908 .proc_handler
= proc_dointvec_minmax
,
915 .procname
= "softlockup_all_cpu_backtrace",
916 .data
= &sysctl_softlockup_all_cpu_backtrace
,
917 .maxlen
= sizeof(int),
919 .proc_handler
= proc_dointvec_minmax
,
924 .procname
= "hardlockup_all_cpu_backtrace",
925 .data
= &sysctl_hardlockup_all_cpu_backtrace
,
926 .maxlen
= sizeof(int),
928 .proc_handler
= proc_dointvec_minmax
,
932 #endif /* CONFIG_SMP */
934 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
936 .procname
= "unknown_nmi_panic",
937 .data
= &unknown_nmi_panic
,
938 .maxlen
= sizeof (int),
940 .proc_handler
= proc_dointvec
,
943 #if defined(CONFIG_X86)
945 .procname
= "panic_on_unrecovered_nmi",
946 .data
= &panic_on_unrecovered_nmi
,
947 .maxlen
= sizeof(int),
949 .proc_handler
= proc_dointvec
,
952 .procname
= "panic_on_io_nmi",
953 .data
= &panic_on_io_nmi
,
954 .maxlen
= sizeof(int),
956 .proc_handler
= proc_dointvec
,
958 #ifdef CONFIG_DEBUG_STACKOVERFLOW
960 .procname
= "panic_on_stackoverflow",
961 .data
= &sysctl_panic_on_stackoverflow
,
962 .maxlen
= sizeof(int),
964 .proc_handler
= proc_dointvec
,
968 .procname
= "bootloader_type",
969 .data
= &bootloader_type
,
970 .maxlen
= sizeof (int),
972 .proc_handler
= proc_dointvec
,
975 .procname
= "bootloader_version",
976 .data
= &bootloader_version
,
977 .maxlen
= sizeof (int),
979 .proc_handler
= proc_dointvec
,
982 .procname
= "kstack_depth_to_print",
983 .data
= &kstack_depth_to_print
,
984 .maxlen
= sizeof(int),
986 .proc_handler
= proc_dointvec
,
989 .procname
= "io_delay_type",
990 .data
= &io_delay_type
,
991 .maxlen
= sizeof(int),
993 .proc_handler
= proc_dointvec
,
996 #if defined(CONFIG_MMU)
998 .procname
= "randomize_va_space",
999 .data
= &randomize_va_space
,
1000 .maxlen
= sizeof(int),
1002 .proc_handler
= proc_dointvec
,
1005 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
1007 .procname
= "spin_retry",
1008 .data
= &spin_retry
,
1009 .maxlen
= sizeof (int),
1011 .proc_handler
= proc_dointvec
,
1014 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
1016 .procname
= "acpi_video_flags",
1017 .data
= &acpi_realmode_flags
,
1018 .maxlen
= sizeof (unsigned long),
1020 .proc_handler
= proc_doulongvec_minmax
,
1023 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
1025 .procname
= "ignore-unaligned-usertrap",
1026 .data
= &no_unaligned_warning
,
1027 .maxlen
= sizeof (int),
1029 .proc_handler
= proc_dointvec
,
1034 .procname
= "unaligned-dump-stack",
1035 .data
= &unaligned_dump_stack
,
1036 .maxlen
= sizeof (int),
1038 .proc_handler
= proc_dointvec
,
1041 #ifdef CONFIG_DETECT_HUNG_TASK
1043 .procname
= "hung_task_panic",
1044 .data
= &sysctl_hung_task_panic
,
1045 .maxlen
= sizeof(int),
1047 .proc_handler
= proc_dointvec_minmax
,
1052 .procname
= "hung_task_check_count",
1053 .data
= &sysctl_hung_task_check_count
,
1054 .maxlen
= sizeof(int),
1056 .proc_handler
= proc_dointvec_minmax
,
1060 .procname
= "hung_task_timeout_secs",
1061 .data
= &sysctl_hung_task_timeout_secs
,
1062 .maxlen
= sizeof(unsigned long),
1064 .proc_handler
= proc_dohung_task_timeout_secs
,
1065 .extra2
= &hung_task_timeout_max
,
1068 .procname
= "hung_task_warnings",
1069 .data
= &sysctl_hung_task_warnings
,
1070 .maxlen
= sizeof(int),
1072 .proc_handler
= proc_dointvec_minmax
,
1076 #ifdef CONFIG_COMPAT
1078 .procname
= "compat-log",
1079 .data
= &compat_log
,
1080 .maxlen
= sizeof (int),
1082 .proc_handler
= proc_dointvec
,
1085 #ifdef CONFIG_RT_MUTEXES
1087 .procname
= "max_lock_depth",
1088 .data
= &max_lock_depth
,
1089 .maxlen
= sizeof(int),
1091 .proc_handler
= proc_dointvec
,
1095 .procname
= "poweroff_cmd",
1096 .data
= &poweroff_cmd
,
1097 .maxlen
= POWEROFF_CMD_PATH_LEN
,
1099 .proc_handler
= proc_dostring
,
1105 .child
= key_sysctls
,
1108 #ifdef CONFIG_PERF_EVENTS
1110 * User-space scripts rely on the existence of this file
1111 * as a feature check for perf_events being enabled.
1113 * So it's an ABI, do not remove!
1116 .procname
= "perf_event_paranoid",
1117 .data
= &sysctl_perf_event_paranoid
,
1118 .maxlen
= sizeof(sysctl_perf_event_paranoid
),
1120 .proc_handler
= proc_dointvec
,
1123 .procname
= "perf_event_mlock_kb",
1124 .data
= &sysctl_perf_event_mlock
,
1125 .maxlen
= sizeof(sysctl_perf_event_mlock
),
1127 .proc_handler
= proc_dointvec
,
1130 .procname
= "perf_event_max_sample_rate",
1131 .data
= &sysctl_perf_event_sample_rate
,
1132 .maxlen
= sizeof(sysctl_perf_event_sample_rate
),
1134 .proc_handler
= perf_proc_update_handler
,
1138 .procname
= "perf_cpu_time_max_percent",
1139 .data
= &sysctl_perf_cpu_time_max_percent
,
1140 .maxlen
= sizeof(sysctl_perf_cpu_time_max_percent
),
1142 .proc_handler
= perf_cpu_time_max_percent_handler
,
1144 .extra2
= &one_hundred
,
1147 #ifdef CONFIG_KMEMCHECK
1149 .procname
= "kmemcheck",
1150 .data
= &kmemcheck_enabled
,
1151 .maxlen
= sizeof(int),
1153 .proc_handler
= proc_dointvec
,
1157 .procname
= "panic_on_warn",
1158 .data
= &panic_on_warn
,
1159 .maxlen
= sizeof(int),
1161 .proc_handler
= proc_dointvec_minmax
,
1165 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
1167 .procname
= "timer_migration",
1168 .data
= &sysctl_timer_migration
,
1169 .maxlen
= sizeof(unsigned int),
1171 .proc_handler
= timer_migration_handler
,
1174 #ifdef CONFIG_BPF_SYSCALL
1176 .procname
= "unprivileged_bpf_disabled",
1177 .data
= &sysctl_unprivileged_bpf_disabled
,
1178 .maxlen
= sizeof(sysctl_unprivileged_bpf_disabled
),
1180 /* only handle a transition from default "0" to "1" */
1181 .proc_handler
= proc_dointvec_minmax
,
1189 static struct ctl_table vm_table
[] = {
1191 .procname
= "overcommit_memory",
1192 .data
= &sysctl_overcommit_memory
,
1193 .maxlen
= sizeof(sysctl_overcommit_memory
),
1195 .proc_handler
= proc_dointvec_minmax
,
1200 .procname
= "panic_on_oom",
1201 .data
= &sysctl_panic_on_oom
,
1202 .maxlen
= sizeof(sysctl_panic_on_oom
),
1204 .proc_handler
= proc_dointvec_minmax
,
1209 .procname
= "oom_kill_allocating_task",
1210 .data
= &sysctl_oom_kill_allocating_task
,
1211 .maxlen
= sizeof(sysctl_oom_kill_allocating_task
),
1213 .proc_handler
= proc_dointvec
,
1216 .procname
= "oom_dump_tasks",
1217 .data
= &sysctl_oom_dump_tasks
,
1218 .maxlen
= sizeof(sysctl_oom_dump_tasks
),
1220 .proc_handler
= proc_dointvec
,
1223 .procname
= "overcommit_ratio",
1224 .data
= &sysctl_overcommit_ratio
,
1225 .maxlen
= sizeof(sysctl_overcommit_ratio
),
1227 .proc_handler
= overcommit_ratio_handler
,
1230 .procname
= "overcommit_kbytes",
1231 .data
= &sysctl_overcommit_kbytes
,
1232 .maxlen
= sizeof(sysctl_overcommit_kbytes
),
1234 .proc_handler
= overcommit_kbytes_handler
,
1237 .procname
= "page-cluster",
1238 .data
= &page_cluster
,
1239 .maxlen
= sizeof(int),
1241 .proc_handler
= proc_dointvec_minmax
,
1245 .procname
= "dirty_background_ratio",
1246 .data
= &dirty_background_ratio
,
1247 .maxlen
= sizeof(dirty_background_ratio
),
1249 .proc_handler
= dirty_background_ratio_handler
,
1251 .extra2
= &one_hundred
,
1254 .procname
= "dirty_background_bytes",
1255 .data
= &dirty_background_bytes
,
1256 .maxlen
= sizeof(dirty_background_bytes
),
1258 .proc_handler
= dirty_background_bytes_handler
,
1262 .procname
= "dirty_ratio",
1263 .data
= &vm_dirty_ratio
,
1264 .maxlen
= sizeof(vm_dirty_ratio
),
1266 .proc_handler
= dirty_ratio_handler
,
1268 .extra2
= &one_hundred
,
1271 .procname
= "dirty_bytes",
1272 .data
= &vm_dirty_bytes
,
1273 .maxlen
= sizeof(vm_dirty_bytes
),
1275 .proc_handler
= dirty_bytes_handler
,
1276 .extra1
= &dirty_bytes_min
,
1279 .procname
= "dirty_writeback_centisecs",
1280 .data
= &dirty_writeback_interval
,
1281 .maxlen
= sizeof(dirty_writeback_interval
),
1283 .proc_handler
= dirty_writeback_centisecs_handler
,
1286 .procname
= "dirty_expire_centisecs",
1287 .data
= &dirty_expire_interval
,
1288 .maxlen
= sizeof(dirty_expire_interval
),
1290 .proc_handler
= proc_dointvec_minmax
,
1294 .procname
= "dirtytime_expire_seconds",
1295 .data
= &dirtytime_expire_interval
,
1296 .maxlen
= sizeof(dirty_expire_interval
),
1298 .proc_handler
= dirtytime_interval_handler
,
1302 .procname
= "nr_pdflush_threads",
1303 .mode
= 0444 /* read-only */,
1304 .proc_handler
= pdflush_proc_obsolete
,
1307 .procname
= "swappiness",
1308 .data
= &vm_swappiness
,
1309 .maxlen
= sizeof(vm_swappiness
),
1311 .proc_handler
= proc_dointvec_minmax
,
1313 .extra2
= &one_hundred
,
1315 #ifdef CONFIG_HUGETLB_PAGE
1317 .procname
= "nr_hugepages",
1319 .maxlen
= sizeof(unsigned long),
1321 .proc_handler
= hugetlb_sysctl_handler
,
1325 .procname
= "nr_hugepages_mempolicy",
1327 .maxlen
= sizeof(unsigned long),
1329 .proc_handler
= &hugetlb_mempolicy_sysctl_handler
,
1333 .procname
= "hugetlb_shm_group",
1334 .data
= &sysctl_hugetlb_shm_group
,
1335 .maxlen
= sizeof(gid_t
),
1337 .proc_handler
= proc_dointvec
,
1340 .procname
= "hugepages_treat_as_movable",
1341 .data
= &hugepages_treat_as_movable
,
1342 .maxlen
= sizeof(int),
1344 .proc_handler
= proc_dointvec
,
1347 .procname
= "nr_overcommit_hugepages",
1349 .maxlen
= sizeof(unsigned long),
1351 .proc_handler
= hugetlb_overcommit_handler
,
1355 .procname
= "lowmem_reserve_ratio",
1356 .data
= &sysctl_lowmem_reserve_ratio
,
1357 .maxlen
= sizeof(sysctl_lowmem_reserve_ratio
),
1359 .proc_handler
= lowmem_reserve_ratio_sysctl_handler
,
1362 .procname
= "drop_caches",
1363 .data
= &sysctl_drop_caches
,
1364 .maxlen
= sizeof(int),
1366 .proc_handler
= drop_caches_sysctl_handler
,
1370 #ifdef CONFIG_COMPACTION
1372 .procname
= "compact_memory",
1373 .data
= &sysctl_compact_memory
,
1374 .maxlen
= sizeof(int),
1376 .proc_handler
= sysctl_compaction_handler
,
1379 .procname
= "extfrag_threshold",
1380 .data
= &sysctl_extfrag_threshold
,
1381 .maxlen
= sizeof(int),
1383 .proc_handler
= sysctl_extfrag_handler
,
1384 .extra1
= &min_extfrag_threshold
,
1385 .extra2
= &max_extfrag_threshold
,
1388 .procname
= "compact_unevictable_allowed",
1389 .data
= &sysctl_compact_unevictable_allowed
,
1390 .maxlen
= sizeof(int),
1392 .proc_handler
= proc_dointvec
,
1397 #endif /* CONFIG_COMPACTION */
1399 .procname
= "min_free_kbytes",
1400 .data
= &min_free_kbytes
,
1401 .maxlen
= sizeof(min_free_kbytes
),
1403 .proc_handler
= min_free_kbytes_sysctl_handler
,
1407 .procname
= "percpu_pagelist_fraction",
1408 .data
= &percpu_pagelist_fraction
,
1409 .maxlen
= sizeof(percpu_pagelist_fraction
),
1411 .proc_handler
= percpu_pagelist_fraction_sysctl_handler
,
1416 .procname
= "max_map_count",
1417 .data
= &sysctl_max_map_count
,
1418 .maxlen
= sizeof(sysctl_max_map_count
),
1420 .proc_handler
= proc_dointvec_minmax
,
1425 .procname
= "nr_trim_pages",
1426 .data
= &sysctl_nr_trim_pages
,
1427 .maxlen
= sizeof(sysctl_nr_trim_pages
),
1429 .proc_handler
= proc_dointvec_minmax
,
1434 .procname
= "laptop_mode",
1435 .data
= &laptop_mode
,
1436 .maxlen
= sizeof(laptop_mode
),
1438 .proc_handler
= proc_dointvec_jiffies
,
1441 .procname
= "block_dump",
1442 .data
= &block_dump
,
1443 .maxlen
= sizeof(block_dump
),
1445 .proc_handler
= proc_dointvec
,
1449 .procname
= "vfs_cache_pressure",
1450 .data
= &sysctl_vfs_cache_pressure
,
1451 .maxlen
= sizeof(sysctl_vfs_cache_pressure
),
1453 .proc_handler
= proc_dointvec
,
1456 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
1458 .procname
= "legacy_va_layout",
1459 .data
= &sysctl_legacy_va_layout
,
1460 .maxlen
= sizeof(sysctl_legacy_va_layout
),
1462 .proc_handler
= proc_dointvec
,
1468 .procname
= "zone_reclaim_mode",
1469 .data
= &zone_reclaim_mode
,
1470 .maxlen
= sizeof(zone_reclaim_mode
),
1472 .proc_handler
= proc_dointvec
,
1476 .procname
= "min_unmapped_ratio",
1477 .data
= &sysctl_min_unmapped_ratio
,
1478 .maxlen
= sizeof(sysctl_min_unmapped_ratio
),
1480 .proc_handler
= sysctl_min_unmapped_ratio_sysctl_handler
,
1482 .extra2
= &one_hundred
,
1485 .procname
= "min_slab_ratio",
1486 .data
= &sysctl_min_slab_ratio
,
1487 .maxlen
= sizeof(sysctl_min_slab_ratio
),
1489 .proc_handler
= sysctl_min_slab_ratio_sysctl_handler
,
1491 .extra2
= &one_hundred
,
1496 .procname
= "stat_interval",
1497 .data
= &sysctl_stat_interval
,
1498 .maxlen
= sizeof(sysctl_stat_interval
),
1500 .proc_handler
= proc_dointvec_jiffies
,
1505 .procname
= "mmap_min_addr",
1506 .data
= &dac_mmap_min_addr
,
1507 .maxlen
= sizeof(unsigned long),
1509 .proc_handler
= mmap_min_addr_handler
,
1514 .procname
= "numa_zonelist_order",
1515 .data
= &numa_zonelist_order
,
1516 .maxlen
= NUMA_ZONELIST_ORDER_LEN
,
1518 .proc_handler
= numa_zonelist_order_handler
,
1521 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
1522 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
1524 .procname
= "vdso_enabled",
1525 #ifdef CONFIG_X86_32
1526 .data
= &vdso32_enabled
,
1527 .maxlen
= sizeof(vdso32_enabled
),
1529 .data
= &vdso_enabled
,
1530 .maxlen
= sizeof(vdso_enabled
),
1533 .proc_handler
= proc_dointvec
,
1537 #ifdef CONFIG_HIGHMEM
1539 .procname
= "highmem_is_dirtyable",
1540 .data
= &vm_highmem_is_dirtyable
,
1541 .maxlen
= sizeof(vm_highmem_is_dirtyable
),
1543 .proc_handler
= proc_dointvec_minmax
,
1548 #ifdef CONFIG_MEMORY_FAILURE
1550 .procname
= "memory_failure_early_kill",
1551 .data
= &sysctl_memory_failure_early_kill
,
1552 .maxlen
= sizeof(sysctl_memory_failure_early_kill
),
1554 .proc_handler
= proc_dointvec_minmax
,
1559 .procname
= "memory_failure_recovery",
1560 .data
= &sysctl_memory_failure_recovery
,
1561 .maxlen
= sizeof(sysctl_memory_failure_recovery
),
1563 .proc_handler
= proc_dointvec_minmax
,
1569 .procname
= "user_reserve_kbytes",
1570 .data
= &sysctl_user_reserve_kbytes
,
1571 .maxlen
= sizeof(sysctl_user_reserve_kbytes
),
1573 .proc_handler
= proc_doulongvec_minmax
,
1576 .procname
= "admin_reserve_kbytes",
1577 .data
= &sysctl_admin_reserve_kbytes
,
1578 .maxlen
= sizeof(sysctl_admin_reserve_kbytes
),
1580 .proc_handler
= proc_doulongvec_minmax
,
1582 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS
1584 .procname
= "mmap_rnd_bits",
1585 .data
= &mmap_rnd_bits
,
1586 .maxlen
= sizeof(mmap_rnd_bits
),
1588 .proc_handler
= proc_dointvec_minmax
,
1589 .extra1
= (void *)&mmap_rnd_bits_min
,
1590 .extra2
= (void *)&mmap_rnd_bits_max
,
1593 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
1595 .procname
= "mmap_rnd_compat_bits",
1596 .data
= &mmap_rnd_compat_bits
,
1597 .maxlen
= sizeof(mmap_rnd_compat_bits
),
1599 .proc_handler
= proc_dointvec_minmax
,
1600 .extra1
= (void *)&mmap_rnd_compat_bits_min
,
1601 .extra2
= (void *)&mmap_rnd_compat_bits_max
,
1607 static struct ctl_table fs_table
[] = {
1609 .procname
= "inode-nr",
1610 .data
= &inodes_stat
,
1611 .maxlen
= 2*sizeof(long),
1613 .proc_handler
= proc_nr_inodes
,
1616 .procname
= "inode-state",
1617 .data
= &inodes_stat
,
1618 .maxlen
= 7*sizeof(long),
1620 .proc_handler
= proc_nr_inodes
,
1623 .procname
= "file-nr",
1624 .data
= &files_stat
,
1625 .maxlen
= sizeof(files_stat
),
1627 .proc_handler
= proc_nr_files
,
1630 .procname
= "file-max",
1631 .data
= &files_stat
.max_files
,
1632 .maxlen
= sizeof(files_stat
.max_files
),
1634 .proc_handler
= proc_doulongvec_minmax
,
1637 .procname
= "nr_open",
1638 .data
= &sysctl_nr_open
,
1639 .maxlen
= sizeof(int),
1641 .proc_handler
= proc_dointvec_minmax
,
1642 .extra1
= &sysctl_nr_open_min
,
1643 .extra2
= &sysctl_nr_open_max
,
1646 .procname
= "dentry-state",
1647 .data
= &dentry_stat
,
1648 .maxlen
= 6*sizeof(long),
1650 .proc_handler
= proc_nr_dentry
,
1653 .procname
= "overflowuid",
1654 .data
= &fs_overflowuid
,
1655 .maxlen
= sizeof(int),
1657 .proc_handler
= proc_dointvec_minmax
,
1658 .extra1
= &minolduid
,
1659 .extra2
= &maxolduid
,
1662 .procname
= "overflowgid",
1663 .data
= &fs_overflowgid
,
1664 .maxlen
= sizeof(int),
1666 .proc_handler
= proc_dointvec_minmax
,
1667 .extra1
= &minolduid
,
1668 .extra2
= &maxolduid
,
1670 #ifdef CONFIG_FILE_LOCKING
1672 .procname
= "leases-enable",
1673 .data
= &leases_enable
,
1674 .maxlen
= sizeof(int),
1676 .proc_handler
= proc_dointvec
,
1679 #ifdef CONFIG_DNOTIFY
1681 .procname
= "dir-notify-enable",
1682 .data
= &dir_notify_enable
,
1683 .maxlen
= sizeof(int),
1685 .proc_handler
= proc_dointvec
,
1689 #ifdef CONFIG_FILE_LOCKING
1691 .procname
= "lease-break-time",
1692 .data
= &lease_break_time
,
1693 .maxlen
= sizeof(int),
1695 .proc_handler
= proc_dointvec
,
1700 .procname
= "aio-nr",
1702 .maxlen
= sizeof(aio_nr
),
1704 .proc_handler
= proc_doulongvec_minmax
,
1707 .procname
= "aio-max-nr",
1708 .data
= &aio_max_nr
,
1709 .maxlen
= sizeof(aio_max_nr
),
1711 .proc_handler
= proc_doulongvec_minmax
,
1713 #endif /* CONFIG_AIO */
1714 #ifdef CONFIG_INOTIFY_USER
1716 .procname
= "inotify",
1718 .child
= inotify_table
,
1723 .procname
= "epoll",
1725 .child
= epoll_table
,
1730 .procname
= "protected_symlinks",
1731 .data
= &sysctl_protected_symlinks
,
1732 .maxlen
= sizeof(int),
1734 .proc_handler
= proc_dointvec_minmax
,
1739 .procname
= "protected_hardlinks",
1740 .data
= &sysctl_protected_hardlinks
,
1741 .maxlen
= sizeof(int),
1743 .proc_handler
= proc_dointvec_minmax
,
1748 .procname
= "suid_dumpable",
1749 .data
= &suid_dumpable
,
1750 .maxlen
= sizeof(int),
1752 .proc_handler
= proc_dointvec_minmax_coredump
,
1756 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
1758 .procname
= "binfmt_misc",
1760 .child
= sysctl_mount_point
,
1764 .procname
= "pipe-max-size",
1765 .data
= &pipe_max_size
,
1766 .maxlen
= sizeof(int),
1768 .proc_handler
= &pipe_proc_fn
,
1769 .extra1
= &pipe_min_size
,
1772 .procname
= "pipe-user-pages-hard",
1773 .data
= &pipe_user_pages_hard
,
1774 .maxlen
= sizeof(pipe_user_pages_hard
),
1776 .proc_handler
= proc_doulongvec_minmax
,
1779 .procname
= "pipe-user-pages-soft",
1780 .data
= &pipe_user_pages_soft
,
1781 .maxlen
= sizeof(pipe_user_pages_soft
),
1783 .proc_handler
= proc_doulongvec_minmax
,
1788 static struct ctl_table debug_table
[] = {
1789 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
1791 .procname
= "exception-trace",
1792 .data
= &show_unhandled_signals
,
1793 .maxlen
= sizeof(int),
1795 .proc_handler
= proc_dointvec
1798 #if defined(CONFIG_OPTPROBES)
1800 .procname
= "kprobes-optimization",
1801 .data
= &sysctl_kprobes_optimization
,
1802 .maxlen
= sizeof(int),
1804 .proc_handler
= proc_kprobes_optimization_handler
,
1812 static struct ctl_table dev_table
[] = {
1816 int __init
sysctl_init(void)
1818 struct ctl_table_header
*hdr
;
1820 hdr
= register_sysctl_table(sysctl_base_table
);
1821 kmemleak_not_leak(hdr
);
1825 #endif /* CONFIG_SYSCTL */
1831 #ifdef CONFIG_PROC_SYSCTL
1833 static int _proc_do_string(char *data
, int maxlen
, int write
,
1834 char __user
*buffer
,
1835 size_t *lenp
, loff_t
*ppos
)
1841 if (!data
|| !maxlen
|| !*lenp
) {
1847 if (sysctl_writes_strict
== SYSCTL_WRITES_STRICT
) {
1848 /* Only continue writes not past the end of buffer. */
1850 if (len
> maxlen
- 1)
1857 /* Start writing from beginning of buffer. */
1863 while ((p
- buffer
) < *lenp
&& len
< maxlen
- 1) {
1864 if (get_user(c
, p
++))
1866 if (c
== 0 || c
== '\n')
1887 if (copy_to_user(buffer
, data
, len
))
1890 if (put_user('\n', buffer
+ len
))
1900 static void warn_sysctl_write(struct ctl_table
*table
)
1902 pr_warn_once("%s wrote to %s when file position was not 0!\n"
1903 "This will not be supported in the future. To silence this\n"
1904 "warning, set kernel.sysctl_writes_strict = -1\n",
1905 current
->comm
, table
->procname
);
1909 * proc_dostring - read a string sysctl
1910 * @table: the sysctl table
1911 * @write: %TRUE if this is a write to the sysctl file
1912 * @buffer: the user buffer
1913 * @lenp: the size of the user buffer
1914 * @ppos: file position
1916 * Reads/writes a string from/to the user buffer. If the kernel
1917 * buffer provided is not large enough to hold the string, the
1918 * string is truncated. The copied string is %NULL-terminated.
1919 * If the string is being read by the user process, it is copied
1920 * and a newline '\n' is added. It is truncated if the buffer is
1923 * Returns 0 on success.
1925 int proc_dostring(struct ctl_table
*table
, int write
,
1926 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
1928 if (write
&& *ppos
&& sysctl_writes_strict
== SYSCTL_WRITES_WARN
)
1929 warn_sysctl_write(table
);
1931 return _proc_do_string((char *)(table
->data
), table
->maxlen
, write
,
1932 (char __user
*)buffer
, lenp
, ppos
);
1935 static size_t proc_skip_spaces(char **buf
)
1938 char *tmp
= skip_spaces(*buf
);
1944 static void proc_skip_char(char **buf
, size_t *size
, const char v
)
1954 #define TMPBUFLEN 22
1956 * proc_get_long - reads an ASCII formatted integer from a user buffer
1958 * @buf: a kernel buffer
1959 * @size: size of the kernel buffer
1960 * @val: this is where the number will be stored
1961 * @neg: set to %TRUE if number is negative
1962 * @perm_tr: a vector which contains the allowed trailers
1963 * @perm_tr_len: size of the perm_tr vector
1964 * @tr: pointer to store the trailer character
1966 * In case of success %0 is returned and @buf and @size are updated with
1967 * the amount of bytes read. If @tr is non-NULL and a trailing
1968 * character exists (size is non-zero after returning from this
1969 * function), @tr is updated with the trailing character.
1971 static int proc_get_long(char **buf
, size_t *size
,
1972 unsigned long *val
, bool *neg
,
1973 const char *perm_tr
, unsigned perm_tr_len
, char *tr
)
1976 char *p
, tmp
[TMPBUFLEN
];
1982 if (len
> TMPBUFLEN
- 1)
1983 len
= TMPBUFLEN
- 1;
1985 memcpy(tmp
, *buf
, len
);
1989 if (*p
== '-' && *size
> 1) {
1997 *val
= simple_strtoul(p
, &p
, 0);
2001 /* We don't know if the next char is whitespace thus we may accept
2002 * invalid integers (e.g. 1234...a) or two integers instead of one
2003 * (e.g. 123...1). So lets not allow such large numbers. */
2004 if (len
== TMPBUFLEN
- 1)
2007 if (len
< *size
&& perm_tr_len
&& !memchr(perm_tr
, *p
, perm_tr_len
))
2010 if (tr
&& (len
< *size
))
2020 * proc_put_long - converts an integer to a decimal ASCII formatted string
2022 * @buf: the user buffer
2023 * @size: the size of the user buffer
2024 * @val: the integer to be converted
2025 * @neg: sign of the number, %TRUE for negative
2027 * In case of success %0 is returned and @buf and @size are updated with
2028 * the amount of bytes written.
2030 static int proc_put_long(void __user
**buf
, size_t *size
, unsigned long val
,
2034 char tmp
[TMPBUFLEN
], *p
= tmp
;
2036 sprintf(p
, "%s%lu", neg
? "-" : "", val
);
2040 if (copy_to_user(*buf
, tmp
, len
))
2048 static int proc_put_char(void __user
**buf
, size_t *size
, char c
)
2051 char __user
**buffer
= (char __user
**)buf
;
2052 if (put_user(c
, *buffer
))
2054 (*size
)--, (*buffer
)++;
2060 static int do_proc_dointvec_conv(bool *negp
, unsigned long *lvalp
,
2062 int write
, void *data
)
2066 if (*lvalp
> (unsigned long) INT_MAX
+ 1)
2070 if (*lvalp
> (unsigned long) INT_MAX
)
2078 *lvalp
= -(unsigned long)val
;
2081 *lvalp
= (unsigned long)val
;
2087 static const char proc_wspace_sep
[] = { ' ', '\t', '\n' };
2089 static int __do_proc_dointvec(void *tbl_data
, struct ctl_table
*table
,
2090 int write
, void __user
*buffer
,
2091 size_t *lenp
, loff_t
*ppos
,
2092 int (*conv
)(bool *negp
, unsigned long *lvalp
, int *valp
,
2093 int write
, void *data
),
2096 int *i
, vleft
, first
= 1, err
= 0;
2098 char *kbuf
= NULL
, *p
;
2100 if (!tbl_data
|| !table
->maxlen
|| !*lenp
|| (*ppos
&& !write
)) {
2105 i
= (int *) tbl_data
;
2106 vleft
= table
->maxlen
/ sizeof(*i
);
2110 conv
= do_proc_dointvec_conv
;
2114 switch (sysctl_writes_strict
) {
2115 case SYSCTL_WRITES_STRICT
:
2117 case SYSCTL_WRITES_WARN
:
2118 warn_sysctl_write(table
);
2125 if (left
> PAGE_SIZE
- 1)
2126 left
= PAGE_SIZE
- 1;
2127 p
= kbuf
= memdup_user_nul(buffer
, left
);
2129 return PTR_ERR(kbuf
);
2132 for (; left
&& vleft
--; i
++, first
=0) {
2137 left
-= proc_skip_spaces(&p
);
2141 err
= proc_get_long(&p
, &left
, &lval
, &neg
,
2143 sizeof(proc_wspace_sep
), NULL
);
2146 if (conv(&neg
, &lval
, i
, 1, data
)) {
2151 if (conv(&neg
, &lval
, i
, 0, data
)) {
2156 err
= proc_put_char(&buffer
, &left
, '\t');
2159 err
= proc_put_long(&buffer
, &left
, lval
, neg
);
2165 if (!write
&& !first
&& left
&& !err
)
2166 err
= proc_put_char(&buffer
, &left
, '\n');
2167 if (write
&& !err
&& left
)
2168 left
-= proc_skip_spaces(&p
);
2172 return err
? : -EINVAL
;
2180 static int do_proc_dointvec(struct ctl_table
*table
, int write
,
2181 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
,
2182 int (*conv
)(bool *negp
, unsigned long *lvalp
, int *valp
,
2183 int write
, void *data
),
2186 return __do_proc_dointvec(table
->data
, table
, write
,
2187 buffer
, lenp
, ppos
, conv
, data
);
2191 * proc_dointvec - read a vector of integers
2192 * @table: the sysctl table
2193 * @write: %TRUE if this is a write to the sysctl file
2194 * @buffer: the user buffer
2195 * @lenp: the size of the user buffer
2196 * @ppos: file position
2198 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2199 * values from/to the user buffer, treated as an ASCII string.
2201 * Returns 0 on success.
2203 int proc_dointvec(struct ctl_table
*table
, int write
,
2204 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2206 return do_proc_dointvec(table
,write
,buffer
,lenp
,ppos
,
2211 * Taint values can only be increased
2212 * This means we can safely use a temporary.
2214 static int proc_taint(struct ctl_table
*table
, int write
,
2215 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2218 unsigned long tmptaint
= get_taint();
2221 if (write
&& !capable(CAP_SYS_ADMIN
))
2226 err
= proc_doulongvec_minmax(&t
, write
, buffer
, lenp
, ppos
);
2232 * Poor man's atomic or. Not worth adding a primitive
2233 * to everyone's atomic.h for this
2236 for (i
= 0; i
< BITS_PER_LONG
&& tmptaint
>> i
; i
++) {
2237 if ((tmptaint
>> i
) & 1)
2238 add_taint(i
, LOCKDEP_STILL_OK
);
2245 #ifdef CONFIG_PRINTK
2246 static int proc_dointvec_minmax_sysadmin(struct ctl_table
*table
, int write
,
2247 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2249 if (write
&& !capable(CAP_SYS_ADMIN
))
2252 return proc_dointvec_minmax(table
, write
, buffer
, lenp
, ppos
);
2256 struct do_proc_dointvec_minmax_conv_param
{
2261 static int do_proc_dointvec_minmax_conv(bool *negp
, unsigned long *lvalp
,
2263 int write
, void *data
)
2265 struct do_proc_dointvec_minmax_conv_param
*param
= data
;
2267 int val
= *negp
? -*lvalp
: *lvalp
;
2268 if ((param
->min
&& *param
->min
> val
) ||
2269 (param
->max
&& *param
->max
< val
))
2276 *lvalp
= -(unsigned long)val
;
2279 *lvalp
= (unsigned long)val
;
2286 * proc_dointvec_minmax - read a vector of integers with min/max values
2287 * @table: the sysctl table
2288 * @write: %TRUE if this is a write to the sysctl file
2289 * @buffer: the user buffer
2290 * @lenp: the size of the user buffer
2291 * @ppos: file position
2293 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2294 * values from/to the user buffer, treated as an ASCII string.
2296 * This routine will ensure the values are within the range specified by
2297 * table->extra1 (min) and table->extra2 (max).
2299 * Returns 0 on success.
2301 int proc_dointvec_minmax(struct ctl_table
*table
, int write
,
2302 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2304 struct do_proc_dointvec_minmax_conv_param param
= {
2305 .min
= (int *) table
->extra1
,
2306 .max
= (int *) table
->extra2
,
2308 return do_proc_dointvec(table
, write
, buffer
, lenp
, ppos
,
2309 do_proc_dointvec_minmax_conv
, ¶m
);
2312 static void validate_coredump_safety(void)
2314 #ifdef CONFIG_COREDUMP
2315 if (suid_dumpable
== SUID_DUMP_ROOT
&&
2316 core_pattern
[0] != '/' && core_pattern
[0] != '|') {
2317 printk(KERN_WARNING
"Unsafe core_pattern used with "\
2318 "suid_dumpable=2. Pipe handler or fully qualified "\
2319 "core dump path required.\n");
2324 static int proc_dointvec_minmax_coredump(struct ctl_table
*table
, int write
,
2325 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2327 int error
= proc_dointvec_minmax(table
, write
, buffer
, lenp
, ppos
);
2329 validate_coredump_safety();
2333 #ifdef CONFIG_COREDUMP
2334 static int proc_dostring_coredump(struct ctl_table
*table
, int write
,
2335 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2337 int error
= proc_dostring(table
, write
, buffer
, lenp
, ppos
);
2339 validate_coredump_safety();
2344 static int __do_proc_doulongvec_minmax(void *data
, struct ctl_table
*table
, int write
,
2345 void __user
*buffer
,
2346 size_t *lenp
, loff_t
*ppos
,
2347 unsigned long convmul
,
2348 unsigned long convdiv
)
2350 unsigned long *i
, *min
, *max
;
2351 int vleft
, first
= 1, err
= 0;
2353 char *kbuf
= NULL
, *p
;
2355 if (!data
|| !table
->maxlen
|| !*lenp
|| (*ppos
&& !write
)) {
2360 i
= (unsigned long *) data
;
2361 min
= (unsigned long *) table
->extra1
;
2362 max
= (unsigned long *) table
->extra2
;
2363 vleft
= table
->maxlen
/ sizeof(unsigned long);
2368 switch (sysctl_writes_strict
) {
2369 case SYSCTL_WRITES_STRICT
:
2371 case SYSCTL_WRITES_WARN
:
2372 warn_sysctl_write(table
);
2379 if (left
> PAGE_SIZE
- 1)
2380 left
= PAGE_SIZE
- 1;
2381 p
= kbuf
= memdup_user_nul(buffer
, left
);
2383 return PTR_ERR(kbuf
);
2386 for (; left
&& vleft
--; i
++, first
= 0) {
2392 left
-= proc_skip_spaces(&p
);
2394 err
= proc_get_long(&p
, &left
, &val
, &neg
,
2396 sizeof(proc_wspace_sep
), NULL
);
2401 if ((min
&& val
< *min
) || (max
&& val
> *max
))
2405 val
= convdiv
* (*i
) / convmul
;
2407 err
= proc_put_char(&buffer
, &left
, '\t');
2411 err
= proc_put_long(&buffer
, &left
, val
, false);
2417 if (!write
&& !first
&& left
&& !err
)
2418 err
= proc_put_char(&buffer
, &left
, '\n');
2420 left
-= proc_skip_spaces(&p
);
2424 return err
? : -EINVAL
;
2432 static int do_proc_doulongvec_minmax(struct ctl_table
*table
, int write
,
2433 void __user
*buffer
,
2434 size_t *lenp
, loff_t
*ppos
,
2435 unsigned long convmul
,
2436 unsigned long convdiv
)
2438 return __do_proc_doulongvec_minmax(table
->data
, table
, write
,
2439 buffer
, lenp
, ppos
, convmul
, convdiv
);
2443 * proc_doulongvec_minmax - read a vector of long integers with min/max values
2444 * @table: the sysctl table
2445 * @write: %TRUE if this is a write to the sysctl file
2446 * @buffer: the user buffer
2447 * @lenp: the size of the user buffer
2448 * @ppos: file position
2450 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2451 * values from/to the user buffer, treated as an ASCII string.
2453 * This routine will ensure the values are within the range specified by
2454 * table->extra1 (min) and table->extra2 (max).
2456 * Returns 0 on success.
2458 int proc_doulongvec_minmax(struct ctl_table
*table
, int write
,
2459 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2461 return do_proc_doulongvec_minmax(table
, write
, buffer
, lenp
, ppos
, 1l, 1l);
2465 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
2466 * @table: the sysctl table
2467 * @write: %TRUE if this is a write to the sysctl file
2468 * @buffer: the user buffer
2469 * @lenp: the size of the user buffer
2470 * @ppos: file position
2472 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
2473 * values from/to the user buffer, treated as an ASCII string. The values
2474 * are treated as milliseconds, and converted to jiffies when they are stored.
2476 * This routine will ensure the values are within the range specified by
2477 * table->extra1 (min) and table->extra2 (max).
2479 * Returns 0 on success.
2481 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table
*table
, int write
,
2482 void __user
*buffer
,
2483 size_t *lenp
, loff_t
*ppos
)
2485 return do_proc_doulongvec_minmax(table
, write
, buffer
,
2486 lenp
, ppos
, HZ
, 1000l);
2490 static int do_proc_dointvec_jiffies_conv(bool *negp
, unsigned long *lvalp
,
2492 int write
, void *data
)
2495 if (*lvalp
> LONG_MAX
/ HZ
)
2497 *valp
= *negp
? -(*lvalp
*HZ
) : (*lvalp
*HZ
);
2503 lval
= -(unsigned long)val
;
2506 lval
= (unsigned long)val
;
2513 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp
, unsigned long *lvalp
,
2515 int write
, void *data
)
2518 if (USER_HZ
< HZ
&& *lvalp
> (LONG_MAX
/ HZ
) * USER_HZ
)
2520 *valp
= clock_t_to_jiffies(*negp
? -*lvalp
: *lvalp
);
2526 lval
= -(unsigned long)val
;
2529 lval
= (unsigned long)val
;
2531 *lvalp
= jiffies_to_clock_t(lval
);
2536 static int do_proc_dointvec_ms_jiffies_conv(bool *negp
, unsigned long *lvalp
,
2538 int write
, void *data
)
2541 unsigned long jif
= msecs_to_jiffies(*negp
? -*lvalp
: *lvalp
);
2551 lval
= -(unsigned long)val
;
2554 lval
= (unsigned long)val
;
2556 *lvalp
= jiffies_to_msecs(lval
);
2562 * proc_dointvec_jiffies - read a vector of integers as seconds
2563 * @table: the sysctl table
2564 * @write: %TRUE if this is a write to the sysctl file
2565 * @buffer: the user buffer
2566 * @lenp: the size of the user buffer
2567 * @ppos: file position
2569 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2570 * values from/to the user buffer, treated as an ASCII string.
2571 * The values read are assumed to be in seconds, and are converted into
2574 * Returns 0 on success.
2576 int proc_dointvec_jiffies(struct ctl_table
*table
, int write
,
2577 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2579 return do_proc_dointvec(table
,write
,buffer
,lenp
,ppos
,
2580 do_proc_dointvec_jiffies_conv
,NULL
);
2584 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
2585 * @table: the sysctl table
2586 * @write: %TRUE if this is a write to the sysctl file
2587 * @buffer: the user buffer
2588 * @lenp: the size of the user buffer
2589 * @ppos: pointer to the file position
2591 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2592 * values from/to the user buffer, treated as an ASCII string.
2593 * The values read are assumed to be in 1/USER_HZ seconds, and
2594 * are converted into jiffies.
2596 * Returns 0 on success.
2598 int proc_dointvec_userhz_jiffies(struct ctl_table
*table
, int write
,
2599 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2601 return do_proc_dointvec(table
,write
,buffer
,lenp
,ppos
,
2602 do_proc_dointvec_userhz_jiffies_conv
,NULL
);
2606 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
2607 * @table: the sysctl table
2608 * @write: %TRUE if this is a write to the sysctl file
2609 * @buffer: the user buffer
2610 * @lenp: the size of the user buffer
2611 * @ppos: file position
2612 * @ppos: the current position in the file
2614 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
2615 * values from/to the user buffer, treated as an ASCII string.
2616 * The values read are assumed to be in 1/1000 seconds, and
2617 * are converted into jiffies.
2619 * Returns 0 on success.
2621 int proc_dointvec_ms_jiffies(struct ctl_table
*table
, int write
,
2622 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2624 return do_proc_dointvec(table
, write
, buffer
, lenp
, ppos
,
2625 do_proc_dointvec_ms_jiffies_conv
, NULL
);
2628 static int proc_do_cad_pid(struct ctl_table
*table
, int write
,
2629 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2631 struct pid
*new_pid
;
2635 tmp
= pid_vnr(cad_pid
);
2637 r
= __do_proc_dointvec(&tmp
, table
, write
, buffer
,
2638 lenp
, ppos
, NULL
, NULL
);
2642 new_pid
= find_get_pid(tmp
);
2646 put_pid(xchg(&cad_pid
, new_pid
));
2651 * proc_do_large_bitmap - read/write from/to a large bitmap
2652 * @table: the sysctl table
2653 * @write: %TRUE if this is a write to the sysctl file
2654 * @buffer: the user buffer
2655 * @lenp: the size of the user buffer
2656 * @ppos: file position
2658 * The bitmap is stored at table->data and the bitmap length (in bits)
2661 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
2662 * large bitmaps may be represented in a compact manner. Writing into
2663 * the file will clear the bitmap then update it with the given input.
2665 * Returns 0 on success.
2667 int proc_do_large_bitmap(struct ctl_table
*table
, int write
,
2668 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2672 size_t left
= *lenp
;
2673 unsigned long bitmap_len
= table
->maxlen
;
2674 unsigned long *bitmap
= *(unsigned long **) table
->data
;
2675 unsigned long *tmp_bitmap
= NULL
;
2676 char tr_a
[] = { '-', ',', '\n' }, tr_b
[] = { ',', '\n', 0 }, c
;
2678 if (!bitmap
|| !bitmap_len
|| !left
|| (*ppos
&& !write
)) {
2686 if (left
> PAGE_SIZE
- 1)
2687 left
= PAGE_SIZE
- 1;
2689 p
= kbuf
= memdup_user_nul(buffer
, left
);
2691 return PTR_ERR(kbuf
);
2693 tmp_bitmap
= kzalloc(BITS_TO_LONGS(bitmap_len
) * sizeof(unsigned long),
2699 proc_skip_char(&p
, &left
, '\n');
2700 while (!err
&& left
) {
2701 unsigned long val_a
, val_b
;
2704 err
= proc_get_long(&p
, &left
, &val_a
, &neg
, tr_a
,
2708 if (val_a
>= bitmap_len
|| neg
) {
2720 err
= proc_get_long(&p
, &left
, &val_b
,
2721 &neg
, tr_b
, sizeof(tr_b
),
2725 if (val_b
>= bitmap_len
|| neg
||
2736 bitmap_set(tmp_bitmap
, val_a
, val_b
- val_a
+ 1);
2738 proc_skip_char(&p
, &left
, '\n');
2742 unsigned long bit_a
, bit_b
= 0;
2745 bit_a
= find_next_bit(bitmap
, bitmap_len
, bit_b
);
2746 if (bit_a
>= bitmap_len
)
2748 bit_b
= find_next_zero_bit(bitmap
, bitmap_len
,
2752 err
= proc_put_char(&buffer
, &left
, ',');
2756 err
= proc_put_long(&buffer
, &left
, bit_a
, false);
2759 if (bit_a
!= bit_b
) {
2760 err
= proc_put_char(&buffer
, &left
, '-');
2763 err
= proc_put_long(&buffer
, &left
, bit_b
, false);
2771 err
= proc_put_char(&buffer
, &left
, '\n');
2777 bitmap_or(bitmap
, bitmap
, tmp_bitmap
, bitmap_len
);
2779 bitmap_copy(bitmap
, tmp_bitmap
, bitmap_len
);
2791 #else /* CONFIG_PROC_SYSCTL */
2793 int proc_dostring(struct ctl_table
*table
, int write
,
2794 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2799 int proc_dointvec(struct ctl_table
*table
, int write
,
2800 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2805 int proc_dointvec_minmax(struct ctl_table
*table
, int write
,
2806 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2811 int proc_dointvec_jiffies(struct ctl_table
*table
, int write
,
2812 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2817 int proc_dointvec_userhz_jiffies(struct ctl_table
*table
, int write
,
2818 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2823 int proc_dointvec_ms_jiffies(struct ctl_table
*table
, int write
,
2824 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2829 int proc_doulongvec_minmax(struct ctl_table
*table
, int write
,
2830 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
2835 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table
*table
, int write
,
2836 void __user
*buffer
,
2837 size_t *lenp
, loff_t
*ppos
)
2843 #endif /* CONFIG_PROC_SYSCTL */
2846 * No sense putting this after each symbol definition, twice,
2847 * exception granted :-)
2849 EXPORT_SYMBOL(proc_dointvec
);
2850 EXPORT_SYMBOL(proc_dointvec_jiffies
);
2851 EXPORT_SYMBOL(proc_dointvec_minmax
);
2852 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies
);
2853 EXPORT_SYMBOL(proc_dointvec_ms_jiffies
);
2854 EXPORT_SYMBOL(proc_dostring
);
2855 EXPORT_SYMBOL(proc_doulongvec_minmax
);
2856 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax
);