1 // SPDX-License-Identifier: GPL-2.0-only
3 * sysctl.c: General linux system control interface
5 * Begun 24 March 1995, Stephen Tweedie
6 * Added /proc support, Dec 1995
7 * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
8 * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.
9 * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver.
10 * Dynamic registration fixes, Stephen Tweedie.
11 * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
12 * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris
14 * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer.
15 * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer.
16 * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill
18 * The list_for_each() macro wasn't appropriate for the sysctl loop.
19 * Removed it and replaced it with older style, 03/23/00, Bill Wendling
22 #include <linux/module.h>
23 #include <linux/aio.h>
25 #include <linux/swap.h>
26 #include <linux/slab.h>
27 #include <linux/sysctl.h>
28 #include <linux/bitmap.h>
29 #include <linux/signal.h>
30 #include <linux/panic.h>
31 #include <linux/printk.h>
32 #include <linux/proc_fs.h>
33 #include <linux/security.h>
34 #include <linux/ctype.h>
35 #include <linux/kmemleak.h>
37 #include <linux/init.h>
38 #include <linux/kernel.h>
39 #include <linux/kobject.h>
40 #include <linux/net.h>
41 #include <linux/sysrq.h>
42 #include <linux/highuid.h>
43 #include <linux/writeback.h>
44 #include <linux/ratelimit.h>
45 #include <linux/compaction.h>
46 #include <linux/hugetlb.h>
47 #include <linux/initrd.h>
48 #include <linux/key.h>
49 #include <linux/times.h>
50 #include <linux/limits.h>
51 #include <linux/dcache.h>
52 #include <linux/dnotify.h>
53 #include <linux/syscalls.h>
54 #include <linux/vmstat.h>
55 #include <linux/nfs_fs.h>
56 #include <linux/acpi.h>
57 #include <linux/reboot.h>
58 #include <linux/ftrace.h>
59 #include <linux/perf_event.h>
60 #include <linux/kprobes.h>
61 #include <linux/pipe_fs_i.h>
62 #include <linux/oom.h>
63 #include <linux/kmod.h>
64 #include <linux/capability.h>
65 #include <linux/binfmts.h>
66 #include <linux/sched/sysctl.h>
67 #include <linux/sched/coredump.h>
68 #include <linux/kexec.h>
69 #include <linux/bpf.h>
70 #include <linux/mount.h>
71 #include <linux/userfaultfd_k.h>
72 #include <linux/coredump.h>
73 #include <linux/latencytop.h>
74 #include <linux/pid.h>
75 #include <linux/delayacct.h>
77 #include "../lib/kstrtox.h"
79 #include <linux/uaccess.h>
80 #include <asm/processor.h>
84 #include <asm/stacktrace.h>
88 #include <asm/setup.h>
90 #ifdef CONFIG_BSD_PROCESS_ACCT
91 #include <linux/acct.h>
93 #ifdef CONFIG_RT_MUTEXES
94 #include <linux/rtmutex.h>
96 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT)
97 #include <linux/lockdep.h>
99 #ifdef CONFIG_CHR_DEV_SG
102 #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
103 #include <linux/stackleak.h>
105 #ifdef CONFIG_LOCKUP_DETECTOR
106 #include <linux/nmi.h>
109 #if defined(CONFIG_SYSCTL)
111 /* Constants used for minimum and maximum */
112 #ifdef CONFIG_LOCKUP_DETECTOR
113 static int sixty
= 60;
116 static int __maybe_unused neg_one
= -1;
117 static int __maybe_unused two
= 2;
118 static int __maybe_unused four
= 4;
119 static unsigned long zero_ul
;
120 static unsigned long one_ul
= 1;
121 static unsigned long long_max
= LONG_MAX
;
122 static int one_hundred
= 100;
123 static int two_hundred
= 200;
124 static int one_thousand
= 1000;
126 static int ten_thousand
= 10000;
128 #ifdef CONFIG_PERF_EVENTS
129 static int six_hundred_forty_kb
= 640 * 1024;
132 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
133 static unsigned long dirty_bytes_min
= 2 * PAGE_SIZE
;
135 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
136 static int maxolduid
= 65535;
137 static int minolduid
;
139 static int ngroups_max
= NGROUPS_MAX
;
140 static const int cap_last_cap
= CAP_LAST_CAP
;
143 * This is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs
144 * and hung_task_check_interval_secs
146 #ifdef CONFIG_DETECT_HUNG_TASK
147 static unsigned long hung_task_timeout_max
= (LONG_MAX
/HZ
);
150 #ifdef CONFIG_INOTIFY_USER
151 #include <linux/inotify.h>
153 #ifdef CONFIG_FANOTIFY
154 #include <linux/fanotify.h>
157 #ifdef CONFIG_PROC_SYSCTL
160 * enum sysctl_writes_mode - supported sysctl write modes
162 * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value
163 * to be written, and multiple writes on the same sysctl file descriptor
164 * will rewrite the sysctl value, regardless of file position. No warning
165 * is issued when the initial position is not 0.
166 * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is
168 * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at
169 * file position 0 and the value must be fully contained in the buffer
170 * sent to the write syscall. If dealing with strings respect the file
171 * position, but restrict this to the max length of the buffer, anything
172 * passed the max length will be ignored. Multiple writes will append
175 * These write modes control how current file position affects the behavior of
176 * updating sysctl values through the proc interface on each write.
178 enum sysctl_writes_mode
{
179 SYSCTL_WRITES_LEGACY
= -1,
180 SYSCTL_WRITES_WARN
= 0,
181 SYSCTL_WRITES_STRICT
= 1,
184 static enum sysctl_writes_mode sysctl_writes_strict
= SYSCTL_WRITES_STRICT
;
185 #endif /* CONFIG_PROC_SYSCTL */
187 #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
188 defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
189 int sysctl_legacy_va_layout
;
192 #ifdef CONFIG_COMPACTION
193 static int min_extfrag_threshold
;
194 static int max_extfrag_threshold
= 1000;
197 #endif /* CONFIG_SYSCTL */
199 #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL)
200 static int bpf_stats_handler(struct ctl_table
*table
, int write
,
201 void *buffer
, size_t *lenp
, loff_t
*ppos
)
203 struct static_key
*key
= (struct static_key
*)table
->data
;
204 static int saved_val
;
206 struct ctl_table tmp
= {
208 .maxlen
= sizeof(val
),
210 .extra1
= SYSCTL_ZERO
,
211 .extra2
= SYSCTL_ONE
,
214 if (write
&& !capable(CAP_SYS_ADMIN
))
217 mutex_lock(&bpf_stats_enabled_mutex
);
219 ret
= proc_dointvec_minmax(&tmp
, write
, buffer
, lenp
, ppos
);
220 if (write
&& !ret
&& val
!= saved_val
) {
222 static_key_slow_inc(key
);
224 static_key_slow_dec(key
);
227 mutex_unlock(&bpf_stats_enabled_mutex
);
231 static int bpf_unpriv_handler(struct ctl_table
*table
, int write
,
232 void *buffer
, size_t *lenp
, loff_t
*ppos
)
234 int ret
, unpriv_enable
= *(int *)table
->data
;
235 bool locked_state
= unpriv_enable
== 1;
236 struct ctl_table tmp
= *table
;
238 if (write
&& !capable(CAP_SYS_ADMIN
))
241 tmp
.data
= &unpriv_enable
;
242 ret
= proc_dointvec_minmax(&tmp
, write
, buffer
, lenp
, ppos
);
244 if (locked_state
&& unpriv_enable
!= 1)
246 *(int *)table
->data
= unpriv_enable
;
250 #endif /* CONFIG_BPF_SYSCALL && CONFIG_SYSCTL */
256 #ifdef CONFIG_PROC_SYSCTL
258 static int _proc_do_string(char *data
, int maxlen
, int write
,
259 char *buffer
, size_t *lenp
, loff_t
*ppos
)
264 if (!data
|| !maxlen
|| !*lenp
) {
270 if (sysctl_writes_strict
== SYSCTL_WRITES_STRICT
) {
271 /* Only continue writes not past the end of buffer. */
273 if (len
> maxlen
- 1)
280 /* Start writing from beginning of buffer. */
286 while ((p
- buffer
) < *lenp
&& len
< maxlen
- 1) {
288 if (c
== 0 || c
== '\n')
309 memcpy(buffer
, data
, len
);
320 static void warn_sysctl_write(struct ctl_table
*table
)
322 pr_warn_once("%s wrote to %s when file position was not 0!\n"
323 "This will not be supported in the future. To silence this\n"
324 "warning, set kernel.sysctl_writes_strict = -1\n",
325 current
->comm
, table
->procname
);
329 * proc_first_pos_non_zero_ignore - check if first position is allowed
330 * @ppos: file position
331 * @table: the sysctl table
333 * Returns true if the first position is non-zero and the sysctl_writes_strict
334 * mode indicates this is not allowed for numeric input types. String proc
335 * handlers can ignore the return value.
337 static bool proc_first_pos_non_zero_ignore(loff_t
*ppos
,
338 struct ctl_table
*table
)
343 switch (sysctl_writes_strict
) {
344 case SYSCTL_WRITES_STRICT
:
346 case SYSCTL_WRITES_WARN
:
347 warn_sysctl_write(table
);
355 * proc_dostring - read a string sysctl
356 * @table: the sysctl table
357 * @write: %TRUE if this is a write to the sysctl file
358 * @buffer: the user buffer
359 * @lenp: the size of the user buffer
360 * @ppos: file position
362 * Reads/writes a string from/to the user buffer. If the kernel
363 * buffer provided is not large enough to hold the string, the
364 * string is truncated. The copied string is %NULL-terminated.
365 * If the string is being read by the user process, it is copied
366 * and a newline '\n' is added. It is truncated if the buffer is
369 * Returns 0 on success.
371 int proc_dostring(struct ctl_table
*table
, int write
,
372 void *buffer
, size_t *lenp
, loff_t
*ppos
)
375 proc_first_pos_non_zero_ignore(ppos
, table
);
377 return _proc_do_string(table
->data
, table
->maxlen
, write
, buffer
, lenp
,
381 static size_t proc_skip_spaces(char **buf
)
384 char *tmp
= skip_spaces(*buf
);
390 static void proc_skip_char(char **buf
, size_t *size
, const char v
)
401 * strtoul_lenient - parse an ASCII formatted integer from a buffer and only
404 * @cp: kernel buffer containing the string to parse
405 * @endp: pointer to store the trailing characters
406 * @base: the base to use
407 * @res: where the parsed integer will be stored
409 * In case of success 0 is returned and @res will contain the parsed integer,
410 * @endp will hold any trailing characters.
411 * This function will fail the parse on overflow. If there wasn't an overflow
412 * the function will defer the decision what characters count as invalid to the
415 static int strtoul_lenient(const char *cp
, char **endp
, unsigned int base
,
418 unsigned long long result
;
421 cp
= _parse_integer_fixup_radix(cp
, &base
);
422 rv
= _parse_integer(cp
, base
, &result
);
423 if ((rv
& KSTRTOX_OVERFLOW
) || (result
!= (unsigned long)result
))
431 *res
= (unsigned long)result
;
437 * proc_get_long - reads an ASCII formatted integer from a user buffer
439 * @buf: a kernel buffer
440 * @size: size of the kernel buffer
441 * @val: this is where the number will be stored
442 * @neg: set to %TRUE if number is negative
443 * @perm_tr: a vector which contains the allowed trailers
444 * @perm_tr_len: size of the perm_tr vector
445 * @tr: pointer to store the trailer character
447 * In case of success %0 is returned and @buf and @size are updated with
448 * the amount of bytes read. If @tr is non-NULL and a trailing
449 * character exists (size is non-zero after returning from this
450 * function), @tr is updated with the trailing character.
452 static int proc_get_long(char **buf
, size_t *size
,
453 unsigned long *val
, bool *neg
,
454 const char *perm_tr
, unsigned perm_tr_len
, char *tr
)
457 char *p
, tmp
[TMPBUFLEN
];
463 if (len
> TMPBUFLEN
- 1)
466 memcpy(tmp
, *buf
, len
);
470 if (*p
== '-' && *size
> 1) {
478 if (strtoul_lenient(p
, &p
, 0, val
))
483 /* We don't know if the next char is whitespace thus we may accept
484 * invalid integers (e.g. 1234...a) or two integers instead of one
485 * (e.g. 123...1). So lets not allow such large numbers. */
486 if (len
== TMPBUFLEN
- 1)
489 if (len
< *size
&& perm_tr_len
&& !memchr(perm_tr
, *p
, perm_tr_len
))
492 if (tr
&& (len
< *size
))
502 * proc_put_long - converts an integer to a decimal ASCII formatted string
504 * @buf: the user buffer
505 * @size: the size of the user buffer
506 * @val: the integer to be converted
507 * @neg: sign of the number, %TRUE for negative
509 * In case of success @buf and @size are updated with the amount of bytes
512 static void proc_put_long(void **buf
, size_t *size
, unsigned long val
, bool neg
)
515 char tmp
[TMPBUFLEN
], *p
= tmp
;
517 sprintf(p
, "%s%lu", neg
? "-" : "", val
);
521 memcpy(*buf
, tmp
, len
);
527 static void proc_put_char(void **buf
, size_t *size
, char c
)
530 char **buffer
= (char **)buf
;
539 static int do_proc_dobool_conv(bool *negp
, unsigned long *lvalp
,
541 int write
, void *data
)
544 *(bool *)valp
= *lvalp
;
546 int val
= *(bool *)valp
;
548 *lvalp
= (unsigned long)val
;
554 static int do_proc_dointvec_conv(bool *negp
, unsigned long *lvalp
,
556 int write
, void *data
)
560 if (*lvalp
> (unsigned long) INT_MAX
+ 1)
564 if (*lvalp
> (unsigned long) INT_MAX
)
572 *lvalp
= -(unsigned long)val
;
575 *lvalp
= (unsigned long)val
;
581 static int do_proc_douintvec_conv(unsigned long *lvalp
,
583 int write
, void *data
)
586 if (*lvalp
> UINT_MAX
)
590 unsigned int val
= *valp
;
591 *lvalp
= (unsigned long)val
;
596 static const char proc_wspace_sep
[] = { ' ', '\t', '\n' };
598 static int __do_proc_dointvec(void *tbl_data
, struct ctl_table
*table
,
599 int write
, void *buffer
,
600 size_t *lenp
, loff_t
*ppos
,
601 int (*conv
)(bool *negp
, unsigned long *lvalp
, int *valp
,
602 int write
, void *data
),
605 int *i
, vleft
, first
= 1, err
= 0;
609 if (!tbl_data
|| !table
->maxlen
|| !*lenp
|| (*ppos
&& !write
)) {
614 i
= (int *) tbl_data
;
615 vleft
= table
->maxlen
/ sizeof(*i
);
619 conv
= do_proc_dointvec_conv
;
622 if (proc_first_pos_non_zero_ignore(ppos
, table
))
625 if (left
> PAGE_SIZE
- 1)
626 left
= PAGE_SIZE
- 1;
630 for (; left
&& vleft
--; i
++, first
=0) {
635 left
-= proc_skip_spaces(&p
);
639 err
= proc_get_long(&p
, &left
, &lval
, &neg
,
641 sizeof(proc_wspace_sep
), NULL
);
644 if (conv(&neg
, &lval
, i
, 1, data
)) {
649 if (conv(&neg
, &lval
, i
, 0, data
)) {
654 proc_put_char(&buffer
, &left
, '\t');
655 proc_put_long(&buffer
, &left
, lval
, neg
);
659 if (!write
&& !first
&& left
&& !err
)
660 proc_put_char(&buffer
, &left
, '\n');
661 if (write
&& !err
&& left
)
662 left
-= proc_skip_spaces(&p
);
664 return err
? : -EINVAL
;
671 static int do_proc_dointvec(struct ctl_table
*table
, int write
,
672 void *buffer
, size_t *lenp
, loff_t
*ppos
,
673 int (*conv
)(bool *negp
, unsigned long *lvalp
, int *valp
,
674 int write
, void *data
),
677 return __do_proc_dointvec(table
->data
, table
, write
,
678 buffer
, lenp
, ppos
, conv
, data
);
681 static int do_proc_douintvec_w(unsigned int *tbl_data
,
682 struct ctl_table
*table
,
684 size_t *lenp
, loff_t
*ppos
,
685 int (*conv
)(unsigned long *lvalp
,
687 int write
, void *data
),
698 if (proc_first_pos_non_zero_ignore(ppos
, table
))
701 if (left
> PAGE_SIZE
- 1)
702 left
= PAGE_SIZE
- 1;
704 left
-= proc_skip_spaces(&p
);
710 err
= proc_get_long(&p
, &left
, &lval
, &neg
,
712 sizeof(proc_wspace_sep
), NULL
);
718 if (conv(&lval
, tbl_data
, 1, data
)) {
724 left
-= proc_skip_spaces(&p
);
732 /* This is in keeping with old __do_proc_dointvec() */
738 static int do_proc_douintvec_r(unsigned int *tbl_data
, void *buffer
,
739 size_t *lenp
, loff_t
*ppos
,
740 int (*conv
)(unsigned long *lvalp
,
742 int write
, void *data
),
751 if (conv(&lval
, tbl_data
, 0, data
)) {
756 proc_put_long(&buffer
, &left
, lval
, false);
760 proc_put_char(&buffer
, &left
, '\n');
769 static int __do_proc_douintvec(void *tbl_data
, struct ctl_table
*table
,
770 int write
, void *buffer
,
771 size_t *lenp
, loff_t
*ppos
,
772 int (*conv
)(unsigned long *lvalp
,
774 int write
, void *data
),
777 unsigned int *i
, vleft
;
779 if (!tbl_data
|| !table
->maxlen
|| !*lenp
|| (*ppos
&& !write
)) {
784 i
= (unsigned int *) tbl_data
;
785 vleft
= table
->maxlen
/ sizeof(*i
);
788 * Arrays are not supported, keep this simple. *Do not* add
797 conv
= do_proc_douintvec_conv
;
800 return do_proc_douintvec_w(i
, table
, buffer
, lenp
, ppos
,
802 return do_proc_douintvec_r(i
, buffer
, lenp
, ppos
, conv
, data
);
805 static int do_proc_douintvec(struct ctl_table
*table
, int write
,
806 void *buffer
, size_t *lenp
, loff_t
*ppos
,
807 int (*conv
)(unsigned long *lvalp
,
809 int write
, void *data
),
812 return __do_proc_douintvec(table
->data
, table
, write
,
813 buffer
, lenp
, ppos
, conv
, data
);
817 * proc_dobool - read/write a bool
818 * @table: the sysctl table
819 * @write: %TRUE if this is a write to the sysctl file
820 * @buffer: the user buffer
821 * @lenp: the size of the user buffer
822 * @ppos: file position
824 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
825 * values from/to the user buffer, treated as an ASCII string.
827 * Returns 0 on success.
829 int proc_dobool(struct ctl_table
*table
, int write
, void *buffer
,
830 size_t *lenp
, loff_t
*ppos
)
832 return do_proc_dointvec(table
, write
, buffer
, lenp
, ppos
,
833 do_proc_dobool_conv
, NULL
);
837 * proc_dointvec - read a vector of integers
838 * @table: the sysctl table
839 * @write: %TRUE if this is a write to the sysctl file
840 * @buffer: the user buffer
841 * @lenp: the size of the user buffer
842 * @ppos: file position
844 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
845 * values from/to the user buffer, treated as an ASCII string.
847 * Returns 0 on success.
849 int proc_dointvec(struct ctl_table
*table
, int write
, void *buffer
,
850 size_t *lenp
, loff_t
*ppos
)
852 return do_proc_dointvec(table
, write
, buffer
, lenp
, ppos
, NULL
, NULL
);
855 #ifdef CONFIG_COMPACTION
856 static int proc_dointvec_minmax_warn_RT_change(struct ctl_table
*table
,
857 int write
, void *buffer
, size_t *lenp
, loff_t
*ppos
)
861 if (!IS_ENABLED(CONFIG_PREEMPT_RT
) || !write
)
862 return proc_dointvec_minmax(table
, write
, buffer
, lenp
, ppos
);
864 old
= *(int *)table
->data
;
865 ret
= proc_dointvec_minmax(table
, write
, buffer
, lenp
, ppos
);
868 if (old
!= *(int *)table
->data
)
869 pr_warn_once("sysctl attribute %s changed by %s[%d]\n",
870 table
->procname
, current
->comm
,
871 task_pid_nr(current
));
877 * proc_douintvec - read a vector of unsigned integers
878 * @table: the sysctl table
879 * @write: %TRUE if this is a write to the sysctl file
880 * @buffer: the user buffer
881 * @lenp: the size of the user buffer
882 * @ppos: file position
884 * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer
885 * values from/to the user buffer, treated as an ASCII string.
887 * Returns 0 on success.
889 int proc_douintvec(struct ctl_table
*table
, int write
, void *buffer
,
890 size_t *lenp
, loff_t
*ppos
)
892 return do_proc_douintvec(table
, write
, buffer
, lenp
, ppos
,
893 do_proc_douintvec_conv
, NULL
);
897 * Taint values can only be increased
898 * This means we can safely use a temporary.
900 static int proc_taint(struct ctl_table
*table
, int write
,
901 void *buffer
, size_t *lenp
, loff_t
*ppos
)
904 unsigned long tmptaint
= get_taint();
907 if (write
&& !capable(CAP_SYS_ADMIN
))
912 err
= proc_doulongvec_minmax(&t
, write
, buffer
, lenp
, ppos
);
920 * If we are relying on panic_on_taint not producing
921 * false positives due to userspace input, bail out
922 * before setting the requested taint flags.
924 if (panic_on_taint_nousertaint
&& (tmptaint
& panic_on_taint
))
928 * Poor man's atomic or. Not worth adding a primitive
929 * to everyone's atomic.h for this
931 for (i
= 0; i
< TAINT_FLAGS_COUNT
; i
++)
932 if ((1UL << i
) & tmptaint
)
933 add_taint(i
, LOCKDEP_STILL_OK
);
940 static int proc_dointvec_minmax_sysadmin(struct ctl_table
*table
, int write
,
941 void *buffer
, size_t *lenp
, loff_t
*ppos
)
943 if (write
&& !capable(CAP_SYS_ADMIN
))
946 return proc_dointvec_minmax(table
, write
, buffer
, lenp
, ppos
);
951 * struct do_proc_dointvec_minmax_conv_param - proc_dointvec_minmax() range checking structure
952 * @min: pointer to minimum allowable value
953 * @max: pointer to maximum allowable value
955 * The do_proc_dointvec_minmax_conv_param structure provides the
956 * minimum and maximum values for doing range checking for those sysctl
957 * parameters that use the proc_dointvec_minmax() handler.
959 struct do_proc_dointvec_minmax_conv_param
{
964 static int do_proc_dointvec_minmax_conv(bool *negp
, unsigned long *lvalp
,
966 int write
, void *data
)
969 struct do_proc_dointvec_minmax_conv_param
*param
= data
;
971 * If writing, first do so via a temporary local int so we can
972 * bounds-check it before touching *valp.
974 int *ip
= write
? &tmp
: valp
;
976 ret
= do_proc_dointvec_conv(negp
, lvalp
, ip
, write
, data
);
981 if ((param
->min
&& *param
->min
> tmp
) ||
982 (param
->max
&& *param
->max
< tmp
))
991 * proc_dointvec_minmax - read a vector of integers with min/max values
992 * @table: the sysctl table
993 * @write: %TRUE if this is a write to the sysctl file
994 * @buffer: the user buffer
995 * @lenp: the size of the user buffer
996 * @ppos: file position
998 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
999 * values from/to the user buffer, treated as an ASCII string.
1001 * This routine will ensure the values are within the range specified by
1002 * table->extra1 (min) and table->extra2 (max).
1004 * Returns 0 on success or -EINVAL on write when the range check fails.
1006 int proc_dointvec_minmax(struct ctl_table
*table
, int write
,
1007 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1009 struct do_proc_dointvec_minmax_conv_param param
= {
1010 .min
= (int *) table
->extra1
,
1011 .max
= (int *) table
->extra2
,
1013 return do_proc_dointvec(table
, write
, buffer
, lenp
, ppos
,
1014 do_proc_dointvec_minmax_conv
, ¶m
);
1018 * struct do_proc_douintvec_minmax_conv_param - proc_douintvec_minmax() range checking structure
1019 * @min: pointer to minimum allowable value
1020 * @max: pointer to maximum allowable value
1022 * The do_proc_douintvec_minmax_conv_param structure provides the
1023 * minimum and maximum values for doing range checking for those sysctl
1024 * parameters that use the proc_douintvec_minmax() handler.
1026 struct do_proc_douintvec_minmax_conv_param
{
1031 static int do_proc_douintvec_minmax_conv(unsigned long *lvalp
,
1033 int write
, void *data
)
1037 struct do_proc_douintvec_minmax_conv_param
*param
= data
;
1038 /* write via temporary local uint for bounds-checking */
1039 unsigned int *up
= write
? &tmp
: valp
;
1041 ret
= do_proc_douintvec_conv(lvalp
, up
, write
, data
);
1046 if ((param
->min
&& *param
->min
> tmp
) ||
1047 (param
->max
&& *param
->max
< tmp
))
1057 * proc_douintvec_minmax - read a vector of unsigned ints with min/max values
1058 * @table: the sysctl table
1059 * @write: %TRUE if this is a write to the sysctl file
1060 * @buffer: the user buffer
1061 * @lenp: the size of the user buffer
1062 * @ppos: file position
1064 * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer
1065 * values from/to the user buffer, treated as an ASCII string. Negative
1066 * strings are not allowed.
1068 * This routine will ensure the values are within the range specified by
1069 * table->extra1 (min) and table->extra2 (max). There is a final sanity
1070 * check for UINT_MAX to avoid having to support wrap around uses from
1073 * Returns 0 on success or -ERANGE on write when the range check fails.
1075 int proc_douintvec_minmax(struct ctl_table
*table
, int write
,
1076 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1078 struct do_proc_douintvec_minmax_conv_param param
= {
1079 .min
= (unsigned int *) table
->extra1
,
1080 .max
= (unsigned int *) table
->extra2
,
1082 return do_proc_douintvec(table
, write
, buffer
, lenp
, ppos
,
1083 do_proc_douintvec_minmax_conv
, ¶m
);
1087 * proc_dou8vec_minmax - read a vector of unsigned chars with min/max values
1088 * @table: the sysctl table
1089 * @write: %TRUE if this is a write to the sysctl file
1090 * @buffer: the user buffer
1091 * @lenp: the size of the user buffer
1092 * @ppos: file position
1094 * Reads/writes up to table->maxlen/sizeof(u8) unsigned chars
1095 * values from/to the user buffer, treated as an ASCII string. Negative
1096 * strings are not allowed.
1098 * This routine will ensure the values are within the range specified by
1099 * table->extra1 (min) and table->extra2 (max).
1101 * Returns 0 on success or an error on write when the range check fails.
1103 int proc_dou8vec_minmax(struct ctl_table
*table
, int write
,
1104 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1106 struct ctl_table tmp
;
1107 unsigned int min
= 0, max
= 255U, val
;
1108 u8
*data
= table
->data
;
1109 struct do_proc_douintvec_minmax_conv_param param
= {
1115 /* Do not support arrays yet. */
1116 if (table
->maxlen
!= sizeof(u8
))
1119 if (table
->extra1
) {
1120 min
= *(unsigned int *) table
->extra1
;
1124 if (table
->extra2
) {
1125 max
= *(unsigned int *) table
->extra2
;
1132 tmp
.maxlen
= sizeof(val
);
1135 res
= do_proc_douintvec(&tmp
, write
, buffer
, lenp
, ppos
,
1136 do_proc_douintvec_minmax_conv
, ¶m
);
1143 EXPORT_SYMBOL_GPL(proc_dou8vec_minmax
);
1145 static int do_proc_dopipe_max_size_conv(unsigned long *lvalp
,
1147 int write
, void *data
)
1152 val
= round_pipe_size(*lvalp
);
1158 unsigned int val
= *valp
;
1159 *lvalp
= (unsigned long) val
;
1165 static int proc_dopipe_max_size(struct ctl_table
*table
, int write
,
1166 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1168 return do_proc_douintvec(table
, write
, buffer
, lenp
, ppos
,
1169 do_proc_dopipe_max_size_conv
, NULL
);
1172 static void validate_coredump_safety(void)
1174 #ifdef CONFIG_COREDUMP
1175 if (suid_dumpable
== SUID_DUMP_ROOT
&&
1176 core_pattern
[0] != '/' && core_pattern
[0] != '|') {
1178 "Unsafe core_pattern used with fs.suid_dumpable=2.\n"
1179 "Pipe handler or fully qualified core dump path required.\n"
1180 "Set kernel.core_pattern before fs.suid_dumpable.\n"
1186 static int proc_dointvec_minmax_coredump(struct ctl_table
*table
, int write
,
1187 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1189 int error
= proc_dointvec_minmax(table
, write
, buffer
, lenp
, ppos
);
1191 validate_coredump_safety();
1195 #ifdef CONFIG_COREDUMP
1196 static int proc_dostring_coredump(struct ctl_table
*table
, int write
,
1197 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1199 int error
= proc_dostring(table
, write
, buffer
, lenp
, ppos
);
1201 validate_coredump_safety();
1206 #ifdef CONFIG_MAGIC_SYSRQ
1207 static int sysrq_sysctl_handler(struct ctl_table
*table
, int write
,
1208 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1214 ret
= __do_proc_dointvec(&tmp
, table
, write
, buffer
,
1215 lenp
, ppos
, NULL
, NULL
);
1220 sysrq_toggle_support(tmp
);
1226 static int __do_proc_doulongvec_minmax(void *data
, struct ctl_table
*table
,
1227 int write
, void *buffer
, size_t *lenp
, loff_t
*ppos
,
1228 unsigned long convmul
, unsigned long convdiv
)
1230 unsigned long *i
, *min
, *max
;
1231 int vleft
, first
= 1, err
= 0;
1235 if (!data
|| !table
->maxlen
|| !*lenp
|| (*ppos
&& !write
)) {
1240 i
= (unsigned long *) data
;
1241 min
= (unsigned long *) table
->extra1
;
1242 max
= (unsigned long *) table
->extra2
;
1243 vleft
= table
->maxlen
/ sizeof(unsigned long);
1247 if (proc_first_pos_non_zero_ignore(ppos
, table
))
1250 if (left
> PAGE_SIZE
- 1)
1251 left
= PAGE_SIZE
- 1;
1255 for (; left
&& vleft
--; i
++, first
= 0) {
1261 left
-= proc_skip_spaces(&p
);
1265 err
= proc_get_long(&p
, &left
, &val
, &neg
,
1267 sizeof(proc_wspace_sep
), NULL
);
1272 val
= convmul
* val
/ convdiv
;
1273 if ((min
&& val
< *min
) || (max
&& val
> *max
)) {
1279 val
= convdiv
* (*i
) / convmul
;
1281 proc_put_char(&buffer
, &left
, '\t');
1282 proc_put_long(&buffer
, &left
, val
, false);
1286 if (!write
&& !first
&& left
&& !err
)
1287 proc_put_char(&buffer
, &left
, '\n');
1289 left
-= proc_skip_spaces(&p
);
1291 return err
? : -EINVAL
;
1298 static int do_proc_doulongvec_minmax(struct ctl_table
*table
, int write
,
1299 void *buffer
, size_t *lenp
, loff_t
*ppos
, unsigned long convmul
,
1300 unsigned long convdiv
)
1302 return __do_proc_doulongvec_minmax(table
->data
, table
, write
,
1303 buffer
, lenp
, ppos
, convmul
, convdiv
);
1307 * proc_doulongvec_minmax - read a vector of long integers with min/max values
1308 * @table: the sysctl table
1309 * @write: %TRUE if this is a write to the sysctl file
1310 * @buffer: the user buffer
1311 * @lenp: the size of the user buffer
1312 * @ppos: file position
1314 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
1315 * values from/to the user buffer, treated as an ASCII string.
1317 * This routine will ensure the values are within the range specified by
1318 * table->extra1 (min) and table->extra2 (max).
1320 * Returns 0 on success.
1322 int proc_doulongvec_minmax(struct ctl_table
*table
, int write
,
1323 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1325 return do_proc_doulongvec_minmax(table
, write
, buffer
, lenp
, ppos
, 1l, 1l);
1329 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
1330 * @table: the sysctl table
1331 * @write: %TRUE if this is a write to the sysctl file
1332 * @buffer: the user buffer
1333 * @lenp: the size of the user buffer
1334 * @ppos: file position
1336 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
1337 * values from/to the user buffer, treated as an ASCII string. The values
1338 * are treated as milliseconds, and converted to jiffies when they are stored.
1340 * This routine will ensure the values are within the range specified by
1341 * table->extra1 (min) and table->extra2 (max).
1343 * Returns 0 on success.
1345 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table
*table
, int write
,
1346 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1348 return do_proc_doulongvec_minmax(table
, write
, buffer
,
1349 lenp
, ppos
, HZ
, 1000l);
1353 static int do_proc_dointvec_jiffies_conv(bool *negp
, unsigned long *lvalp
,
1355 int write
, void *data
)
1358 if (*lvalp
> INT_MAX
/ HZ
)
1360 *valp
= *negp
? -(*lvalp
*HZ
) : (*lvalp
*HZ
);
1366 lval
= -(unsigned long)val
;
1369 lval
= (unsigned long)val
;
1376 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp
, unsigned long *lvalp
,
1378 int write
, void *data
)
1381 if (USER_HZ
< HZ
&& *lvalp
> (LONG_MAX
/ HZ
) * USER_HZ
)
1383 *valp
= clock_t_to_jiffies(*negp
? -*lvalp
: *lvalp
);
1389 lval
= -(unsigned long)val
;
1392 lval
= (unsigned long)val
;
1394 *lvalp
= jiffies_to_clock_t(lval
);
1399 static int do_proc_dointvec_ms_jiffies_conv(bool *negp
, unsigned long *lvalp
,
1401 int write
, void *data
)
1404 unsigned long jif
= msecs_to_jiffies(*negp
? -*lvalp
: *lvalp
);
1414 lval
= -(unsigned long)val
;
1417 lval
= (unsigned long)val
;
1419 *lvalp
= jiffies_to_msecs(lval
);
1425 * proc_dointvec_jiffies - read a vector of integers as seconds
1426 * @table: the sysctl table
1427 * @write: %TRUE if this is a write to the sysctl file
1428 * @buffer: the user buffer
1429 * @lenp: the size of the user buffer
1430 * @ppos: file position
1432 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
1433 * values from/to the user buffer, treated as an ASCII string.
1434 * The values read are assumed to be in seconds, and are converted into
1437 * Returns 0 on success.
1439 int proc_dointvec_jiffies(struct ctl_table
*table
, int write
,
1440 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1442 return do_proc_dointvec(table
,write
,buffer
,lenp
,ppos
,
1443 do_proc_dointvec_jiffies_conv
,NULL
);
1447 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
1448 * @table: the sysctl table
1449 * @write: %TRUE if this is a write to the sysctl file
1450 * @buffer: the user buffer
1451 * @lenp: the size of the user buffer
1452 * @ppos: pointer to the file position
1454 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
1455 * values from/to the user buffer, treated as an ASCII string.
1456 * The values read are assumed to be in 1/USER_HZ seconds, and
1457 * are converted into jiffies.
1459 * Returns 0 on success.
1461 int proc_dointvec_userhz_jiffies(struct ctl_table
*table
, int write
,
1462 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1464 return do_proc_dointvec(table
,write
,buffer
,lenp
,ppos
,
1465 do_proc_dointvec_userhz_jiffies_conv
,NULL
);
1469 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
1470 * @table: the sysctl table
1471 * @write: %TRUE if this is a write to the sysctl file
1472 * @buffer: the user buffer
1473 * @lenp: the size of the user buffer
1474 * @ppos: file position
1475 * @ppos: the current position in the file
1477 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
1478 * values from/to the user buffer, treated as an ASCII string.
1479 * The values read are assumed to be in 1/1000 seconds, and
1480 * are converted into jiffies.
1482 * Returns 0 on success.
1484 int proc_dointvec_ms_jiffies(struct ctl_table
*table
, int write
, void *buffer
,
1485 size_t *lenp
, loff_t
*ppos
)
1487 return do_proc_dointvec(table
, write
, buffer
, lenp
, ppos
,
1488 do_proc_dointvec_ms_jiffies_conv
, NULL
);
1491 static int proc_do_cad_pid(struct ctl_table
*table
, int write
, void *buffer
,
1492 size_t *lenp
, loff_t
*ppos
)
1494 struct pid
*new_pid
;
1498 tmp
= pid_vnr(cad_pid
);
1500 r
= __do_proc_dointvec(&tmp
, table
, write
, buffer
,
1501 lenp
, ppos
, NULL
, NULL
);
1505 new_pid
= find_get_pid(tmp
);
1509 put_pid(xchg(&cad_pid
, new_pid
));
1514 * proc_do_large_bitmap - read/write from/to a large bitmap
1515 * @table: the sysctl table
1516 * @write: %TRUE if this is a write to the sysctl file
1517 * @buffer: the user buffer
1518 * @lenp: the size of the user buffer
1519 * @ppos: file position
1521 * The bitmap is stored at table->data and the bitmap length (in bits)
1524 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
1525 * large bitmaps may be represented in a compact manner. Writing into
1526 * the file will clear the bitmap then update it with the given input.
1528 * Returns 0 on success.
1530 int proc_do_large_bitmap(struct ctl_table
*table
, int write
,
1531 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1534 size_t left
= *lenp
;
1535 unsigned long bitmap_len
= table
->maxlen
;
1536 unsigned long *bitmap
= *(unsigned long **) table
->data
;
1537 unsigned long *tmp_bitmap
= NULL
;
1538 char tr_a
[] = { '-', ',', '\n' }, tr_b
[] = { ',', '\n', 0 }, c
;
1540 if (!bitmap
|| !bitmap_len
|| !left
|| (*ppos
&& !write
)) {
1549 if (left
> PAGE_SIZE
- 1) {
1550 left
= PAGE_SIZE
- 1;
1551 /* How much of the buffer we'll skip this pass */
1552 skipped
= *lenp
- left
;
1555 tmp_bitmap
= bitmap_zalloc(bitmap_len
, GFP_KERNEL
);
1558 proc_skip_char(&p
, &left
, '\n');
1559 while (!err
&& left
) {
1560 unsigned long val_a
, val_b
;
1564 /* In case we stop parsing mid-number, we can reset */
1566 err
= proc_get_long(&p
, &left
, &val_a
, &neg
, tr_a
,
1569 * If we consumed the entirety of a truncated buffer or
1570 * only one char is left (may be a "-"), then stop here,
1571 * reset, & come back for more.
1573 if ((left
<= 1) && skipped
) {
1580 if (val_a
>= bitmap_len
|| neg
) {
1592 err
= proc_get_long(&p
, &left
, &val_b
,
1593 &neg
, tr_b
, sizeof(tr_b
),
1596 * If we consumed all of a truncated buffer or
1597 * then stop here, reset, & come back for more.
1599 if (!left
&& skipped
) {
1606 if (val_b
>= bitmap_len
|| neg
||
1617 bitmap_set(tmp_bitmap
, val_a
, val_b
- val_a
+ 1);
1618 proc_skip_char(&p
, &left
, '\n');
1622 unsigned long bit_a
, bit_b
= 0;
1626 bit_a
= find_next_bit(bitmap
, bitmap_len
, bit_b
);
1627 if (bit_a
>= bitmap_len
)
1629 bit_b
= find_next_zero_bit(bitmap
, bitmap_len
,
1633 proc_put_char(&buffer
, &left
, ',');
1634 proc_put_long(&buffer
, &left
, bit_a
, false);
1635 if (bit_a
!= bit_b
) {
1636 proc_put_char(&buffer
, &left
, '-');
1637 proc_put_long(&buffer
, &left
, bit_b
, false);
1642 proc_put_char(&buffer
, &left
, '\n');
1648 bitmap_or(bitmap
, bitmap
, tmp_bitmap
, bitmap_len
);
1650 bitmap_copy(bitmap
, tmp_bitmap
, bitmap_len
);
1656 bitmap_free(tmp_bitmap
);
1660 #else /* CONFIG_PROC_SYSCTL */
1662 int proc_dostring(struct ctl_table
*table
, int write
,
1663 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1668 int proc_dobool(struct ctl_table
*table
, int write
,
1669 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1674 int proc_dointvec(struct ctl_table
*table
, int write
,
1675 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1680 int proc_douintvec(struct ctl_table
*table
, int write
,
1681 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1686 int proc_dointvec_minmax(struct ctl_table
*table
, int write
,
1687 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1692 int proc_douintvec_minmax(struct ctl_table
*table
, int write
,
1693 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1698 int proc_dou8vec_minmax(struct ctl_table
*table
, int write
,
1699 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1704 int proc_dointvec_jiffies(struct ctl_table
*table
, int write
,
1705 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1710 int proc_dointvec_userhz_jiffies(struct ctl_table
*table
, int write
,
1711 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1716 int proc_dointvec_ms_jiffies(struct ctl_table
*table
, int write
,
1717 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1722 int proc_doulongvec_minmax(struct ctl_table
*table
, int write
,
1723 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1728 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table
*table
, int write
,
1729 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1734 int proc_do_large_bitmap(struct ctl_table
*table
, int write
,
1735 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1740 #endif /* CONFIG_PROC_SYSCTL */
1742 #if defined(CONFIG_SYSCTL)
1743 int proc_do_static_key(struct ctl_table
*table
, int write
,
1744 void *buffer
, size_t *lenp
, loff_t
*ppos
)
1746 struct static_key
*key
= (struct static_key
*)table
->data
;
1747 static DEFINE_MUTEX(static_key_mutex
);
1749 struct ctl_table tmp
= {
1751 .maxlen
= sizeof(val
),
1752 .mode
= table
->mode
,
1753 .extra1
= SYSCTL_ZERO
,
1754 .extra2
= SYSCTL_ONE
,
1757 if (write
&& !capable(CAP_SYS_ADMIN
))
1760 mutex_lock(&static_key_mutex
);
1761 val
= static_key_enabled(key
);
1762 ret
= proc_dointvec_minmax(&tmp
, write
, buffer
, lenp
, ppos
);
1763 if (write
&& !ret
) {
1765 static_key_enable(key
);
1767 static_key_disable(key
);
1769 mutex_unlock(&static_key_mutex
);
1773 static struct ctl_table kern_table
[] = {
1775 .procname
= "sched_child_runs_first",
1776 .data
= &sysctl_sched_child_runs_first
,
1777 .maxlen
= sizeof(unsigned int),
1779 .proc_handler
= proc_dointvec
,
1781 #ifdef CONFIG_SCHEDSTATS
1783 .procname
= "sched_schedstats",
1785 .maxlen
= sizeof(unsigned int),
1787 .proc_handler
= sysctl_schedstats
,
1788 .extra1
= SYSCTL_ZERO
,
1789 .extra2
= SYSCTL_ONE
,
1791 #endif /* CONFIG_SCHEDSTATS */
1792 #ifdef CONFIG_TASK_DELAY_ACCT
1794 .procname
= "task_delayacct",
1796 .maxlen
= sizeof(unsigned int),
1798 .proc_handler
= sysctl_delayacct
,
1799 .extra1
= SYSCTL_ZERO
,
1800 .extra2
= SYSCTL_ONE
,
1802 #endif /* CONFIG_TASK_DELAY_ACCT */
1803 #ifdef CONFIG_NUMA_BALANCING
1805 .procname
= "numa_balancing",
1806 .data
= NULL
, /* filled in by handler */
1807 .maxlen
= sizeof(unsigned int),
1809 .proc_handler
= sysctl_numa_balancing
,
1810 .extra1
= SYSCTL_ZERO
,
1811 .extra2
= SYSCTL_ONE
,
1813 #endif /* CONFIG_NUMA_BALANCING */
1815 .procname
= "sched_rt_period_us",
1816 .data
= &sysctl_sched_rt_period
,
1817 .maxlen
= sizeof(unsigned int),
1819 .proc_handler
= sched_rt_handler
,
1822 .procname
= "sched_rt_runtime_us",
1823 .data
= &sysctl_sched_rt_runtime
,
1824 .maxlen
= sizeof(int),
1826 .proc_handler
= sched_rt_handler
,
1829 .procname
= "sched_deadline_period_max_us",
1830 .data
= &sysctl_sched_dl_period_max
,
1831 .maxlen
= sizeof(unsigned int),
1833 .proc_handler
= proc_dointvec
,
1836 .procname
= "sched_deadline_period_min_us",
1837 .data
= &sysctl_sched_dl_period_min
,
1838 .maxlen
= sizeof(unsigned int),
1840 .proc_handler
= proc_dointvec
,
1843 .procname
= "sched_rr_timeslice_ms",
1844 .data
= &sysctl_sched_rr_timeslice
,
1845 .maxlen
= sizeof(int),
1847 .proc_handler
= sched_rr_handler
,
1849 #ifdef CONFIG_UCLAMP_TASK
1851 .procname
= "sched_util_clamp_min",
1852 .data
= &sysctl_sched_uclamp_util_min
,
1853 .maxlen
= sizeof(unsigned int),
1855 .proc_handler
= sysctl_sched_uclamp_handler
,
1858 .procname
= "sched_util_clamp_max",
1859 .data
= &sysctl_sched_uclamp_util_max
,
1860 .maxlen
= sizeof(unsigned int),
1862 .proc_handler
= sysctl_sched_uclamp_handler
,
1865 .procname
= "sched_util_clamp_min_rt_default",
1866 .data
= &sysctl_sched_uclamp_util_min_rt_default
,
1867 .maxlen
= sizeof(unsigned int),
1869 .proc_handler
= sysctl_sched_uclamp_handler
,
1872 #ifdef CONFIG_SCHED_AUTOGROUP
1874 .procname
= "sched_autogroup_enabled",
1875 .data
= &sysctl_sched_autogroup_enabled
,
1876 .maxlen
= sizeof(unsigned int),
1878 .proc_handler
= proc_dointvec_minmax
,
1879 .extra1
= SYSCTL_ZERO
,
1880 .extra2
= SYSCTL_ONE
,
1883 #ifdef CONFIG_CFS_BANDWIDTH
1885 .procname
= "sched_cfs_bandwidth_slice_us",
1886 .data
= &sysctl_sched_cfs_bandwidth_slice
,
1887 .maxlen
= sizeof(unsigned int),
1889 .proc_handler
= proc_dointvec_minmax
,
1890 .extra1
= SYSCTL_ONE
,
1893 #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
1895 .procname
= "sched_energy_aware",
1896 .data
= &sysctl_sched_energy_aware
,
1897 .maxlen
= sizeof(unsigned int),
1899 .proc_handler
= sched_energy_aware_handler
,
1900 .extra1
= SYSCTL_ZERO
,
1901 .extra2
= SYSCTL_ONE
,
1904 #ifdef CONFIG_PROVE_LOCKING
1906 .procname
= "prove_locking",
1907 .data
= &prove_locking
,
1908 .maxlen
= sizeof(int),
1910 .proc_handler
= proc_dointvec
,
1913 #ifdef CONFIG_LOCK_STAT
1915 .procname
= "lock_stat",
1917 .maxlen
= sizeof(int),
1919 .proc_handler
= proc_dointvec
,
1923 .procname
= "panic",
1924 .data
= &panic_timeout
,
1925 .maxlen
= sizeof(int),
1927 .proc_handler
= proc_dointvec
,
1929 #ifdef CONFIG_COREDUMP
1931 .procname
= "core_uses_pid",
1932 .data
= &core_uses_pid
,
1933 .maxlen
= sizeof(int),
1935 .proc_handler
= proc_dointvec
,
1938 .procname
= "core_pattern",
1939 .data
= core_pattern
,
1940 .maxlen
= CORENAME_MAX_SIZE
,
1942 .proc_handler
= proc_dostring_coredump
,
1945 .procname
= "core_pipe_limit",
1946 .data
= &core_pipe_limit
,
1947 .maxlen
= sizeof(unsigned int),
1949 .proc_handler
= proc_dointvec
,
1952 #ifdef CONFIG_PROC_SYSCTL
1954 .procname
= "tainted",
1955 .maxlen
= sizeof(long),
1957 .proc_handler
= proc_taint
,
1960 .procname
= "sysctl_writes_strict",
1961 .data
= &sysctl_writes_strict
,
1962 .maxlen
= sizeof(int),
1964 .proc_handler
= proc_dointvec_minmax
,
1966 .extra2
= SYSCTL_ONE
,
1969 #ifdef CONFIG_LATENCYTOP
1971 .procname
= "latencytop",
1972 .data
= &latencytop_enabled
,
1973 .maxlen
= sizeof(int),
1975 .proc_handler
= sysctl_latencytop
,
1978 #ifdef CONFIG_BLK_DEV_INITRD
1980 .procname
= "real-root-dev",
1981 .data
= &real_root_dev
,
1982 .maxlen
= sizeof(int),
1984 .proc_handler
= proc_dointvec
,
1988 .procname
= "print-fatal-signals",
1989 .data
= &print_fatal_signals
,
1990 .maxlen
= sizeof(int),
1992 .proc_handler
= proc_dointvec
,
1996 .procname
= "reboot-cmd",
1997 .data
= reboot_command
,
2000 .proc_handler
= proc_dostring
,
2003 .procname
= "stop-a",
2004 .data
= &stop_a_enabled
,
2005 .maxlen
= sizeof (int),
2007 .proc_handler
= proc_dointvec
,
2010 .procname
= "scons-poweroff",
2011 .data
= &scons_pwroff
,
2012 .maxlen
= sizeof (int),
2014 .proc_handler
= proc_dointvec
,
2017 #ifdef CONFIG_SPARC64
2019 .procname
= "tsb-ratio",
2020 .data
= &sysctl_tsb_ratio
,
2021 .maxlen
= sizeof (int),
2023 .proc_handler
= proc_dointvec
,
2026 #ifdef CONFIG_PARISC
2028 .procname
= "soft-power",
2029 .data
= &pwrsw_enabled
,
2030 .maxlen
= sizeof (int),
2032 .proc_handler
= proc_dointvec
,
2035 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
2037 .procname
= "unaligned-trap",
2038 .data
= &unaligned_enabled
,
2039 .maxlen
= sizeof (int),
2041 .proc_handler
= proc_dointvec
,
2045 .procname
= "ctrl-alt-del",
2047 .maxlen
= sizeof(int),
2049 .proc_handler
= proc_dointvec
,
2051 #ifdef CONFIG_FUNCTION_TRACER
2053 .procname
= "ftrace_enabled",
2054 .data
= &ftrace_enabled
,
2055 .maxlen
= sizeof(int),
2057 .proc_handler
= ftrace_enable_sysctl
,
2060 #ifdef CONFIG_STACK_TRACER
2062 .procname
= "stack_tracer_enabled",
2063 .data
= &stack_tracer_enabled
,
2064 .maxlen
= sizeof(int),
2066 .proc_handler
= stack_trace_sysctl
,
2069 #ifdef CONFIG_TRACING
2071 .procname
= "ftrace_dump_on_oops",
2072 .data
= &ftrace_dump_on_oops
,
2073 .maxlen
= sizeof(int),
2075 .proc_handler
= proc_dointvec
,
2078 .procname
= "traceoff_on_warning",
2079 .data
= &__disable_trace_on_warning
,
2080 .maxlen
= sizeof(__disable_trace_on_warning
),
2082 .proc_handler
= proc_dointvec
,
2085 .procname
= "tracepoint_printk",
2086 .data
= &tracepoint_printk
,
2087 .maxlen
= sizeof(tracepoint_printk
),
2089 .proc_handler
= tracepoint_printk_sysctl
,
2092 #ifdef CONFIG_KEXEC_CORE
2094 .procname
= "kexec_load_disabled",
2095 .data
= &kexec_load_disabled
,
2096 .maxlen
= sizeof(int),
2098 /* only handle a transition from default "0" to "1" */
2099 .proc_handler
= proc_dointvec_minmax
,
2100 .extra1
= SYSCTL_ONE
,
2101 .extra2
= SYSCTL_ONE
,
2104 #ifdef CONFIG_MODULES
2106 .procname
= "modprobe",
2107 .data
= &modprobe_path
,
2108 .maxlen
= KMOD_PATH_LEN
,
2110 .proc_handler
= proc_dostring
,
2113 .procname
= "modules_disabled",
2114 .data
= &modules_disabled
,
2115 .maxlen
= sizeof(int),
2117 /* only handle a transition from default "0" to "1" */
2118 .proc_handler
= proc_dointvec_minmax
,
2119 .extra1
= SYSCTL_ONE
,
2120 .extra2
= SYSCTL_ONE
,
2123 #ifdef CONFIG_UEVENT_HELPER
2125 .procname
= "hotplug",
2126 .data
= &uevent_helper
,
2127 .maxlen
= UEVENT_HELPER_PATH_LEN
,
2129 .proc_handler
= proc_dostring
,
2132 #ifdef CONFIG_CHR_DEV_SG
2134 .procname
= "sg-big-buff",
2135 .data
= &sg_big_buff
,
2136 .maxlen
= sizeof (int),
2138 .proc_handler
= proc_dointvec
,
2141 #ifdef CONFIG_BSD_PROCESS_ACCT
2145 .maxlen
= 3*sizeof(int),
2147 .proc_handler
= proc_dointvec
,
2150 #ifdef CONFIG_MAGIC_SYSRQ
2152 .procname
= "sysrq",
2154 .maxlen
= sizeof (int),
2156 .proc_handler
= sysrq_sysctl_handler
,
2159 #ifdef CONFIG_PROC_SYSCTL
2161 .procname
= "cad_pid",
2163 .maxlen
= sizeof (int),
2165 .proc_handler
= proc_do_cad_pid
,
2169 .procname
= "threads-max",
2171 .maxlen
= sizeof(int),
2173 .proc_handler
= sysctl_max_threads
,
2176 .procname
= "random",
2178 .child
= random_table
,
2181 .procname
= "usermodehelper",
2183 .child
= usermodehelper_table
,
2185 #ifdef CONFIG_FW_LOADER_USER_HELPER
2187 .procname
= "firmware_config",
2189 .child
= firmware_config_table
,
2193 .procname
= "overflowuid",
2194 .data
= &overflowuid
,
2195 .maxlen
= sizeof(int),
2197 .proc_handler
= proc_dointvec_minmax
,
2198 .extra1
= &minolduid
,
2199 .extra2
= &maxolduid
,
2202 .procname
= "overflowgid",
2203 .data
= &overflowgid
,
2204 .maxlen
= sizeof(int),
2206 .proc_handler
= proc_dointvec_minmax
,
2207 .extra1
= &minolduid
,
2208 .extra2
= &maxolduid
,
2212 .procname
= "userprocess_debug",
2213 .data
= &show_unhandled_signals
,
2214 .maxlen
= sizeof(int),
2216 .proc_handler
= proc_dointvec
,
2221 .procname
= "oops_all_cpu_backtrace",
2222 .data
= &sysctl_oops_all_cpu_backtrace
,
2223 .maxlen
= sizeof(int),
2225 .proc_handler
= proc_dointvec_minmax
,
2226 .extra1
= SYSCTL_ZERO
,
2227 .extra2
= SYSCTL_ONE
,
2229 #endif /* CONFIG_SMP */
2231 .procname
= "pid_max",
2233 .maxlen
= sizeof (int),
2235 .proc_handler
= proc_dointvec_minmax
,
2236 .extra1
= &pid_max_min
,
2237 .extra2
= &pid_max_max
,
2240 .procname
= "panic_on_oops",
2241 .data
= &panic_on_oops
,
2242 .maxlen
= sizeof(int),
2244 .proc_handler
= proc_dointvec
,
2247 .procname
= "panic_print",
2248 .data
= &panic_print
,
2249 .maxlen
= sizeof(unsigned long),
2251 .proc_handler
= proc_doulongvec_minmax
,
2253 #if defined CONFIG_PRINTK
2255 .procname
= "printk",
2256 .data
= &console_loglevel
,
2257 .maxlen
= 4*sizeof(int),
2259 .proc_handler
= proc_dointvec
,
2262 .procname
= "printk_ratelimit",
2263 .data
= &printk_ratelimit_state
.interval
,
2264 .maxlen
= sizeof(int),
2266 .proc_handler
= proc_dointvec_jiffies
,
2269 .procname
= "printk_ratelimit_burst",
2270 .data
= &printk_ratelimit_state
.burst
,
2271 .maxlen
= sizeof(int),
2273 .proc_handler
= proc_dointvec
,
2276 .procname
= "printk_delay",
2277 .data
= &printk_delay_msec
,
2278 .maxlen
= sizeof(int),
2280 .proc_handler
= proc_dointvec_minmax
,
2281 .extra1
= SYSCTL_ZERO
,
2282 .extra2
= &ten_thousand
,
2285 .procname
= "printk_devkmsg",
2286 .data
= devkmsg_log_str
,
2287 .maxlen
= DEVKMSG_STR_MAX_SIZE
,
2289 .proc_handler
= devkmsg_sysctl_set_loglvl
,
2292 .procname
= "dmesg_restrict",
2293 .data
= &dmesg_restrict
,
2294 .maxlen
= sizeof(int),
2296 .proc_handler
= proc_dointvec_minmax_sysadmin
,
2297 .extra1
= SYSCTL_ZERO
,
2298 .extra2
= SYSCTL_ONE
,
2301 .procname
= "kptr_restrict",
2302 .data
= &kptr_restrict
,
2303 .maxlen
= sizeof(int),
2305 .proc_handler
= proc_dointvec_minmax_sysadmin
,
2306 .extra1
= SYSCTL_ZERO
,
2311 .procname
= "ngroups_max",
2312 .data
= &ngroups_max
,
2313 .maxlen
= sizeof (int),
2315 .proc_handler
= proc_dointvec
,
2318 .procname
= "cap_last_cap",
2319 .data
= (void *)&cap_last_cap
,
2320 .maxlen
= sizeof(int),
2322 .proc_handler
= proc_dointvec
,
2324 #if defined(CONFIG_LOCKUP_DETECTOR)
2326 .procname
= "watchdog",
2327 .data
= &watchdog_user_enabled
,
2328 .maxlen
= sizeof(int),
2330 .proc_handler
= proc_watchdog
,
2331 .extra1
= SYSCTL_ZERO
,
2332 .extra2
= SYSCTL_ONE
,
2335 .procname
= "watchdog_thresh",
2336 .data
= &watchdog_thresh
,
2337 .maxlen
= sizeof(int),
2339 .proc_handler
= proc_watchdog_thresh
,
2340 .extra1
= SYSCTL_ZERO
,
2344 .procname
= "nmi_watchdog",
2345 .data
= &nmi_watchdog_user_enabled
,
2346 .maxlen
= sizeof(int),
2347 .mode
= NMI_WATCHDOG_SYSCTL_PERM
,
2348 .proc_handler
= proc_nmi_watchdog
,
2349 .extra1
= SYSCTL_ZERO
,
2350 .extra2
= SYSCTL_ONE
,
2353 .procname
= "watchdog_cpumask",
2354 .data
= &watchdog_cpumask_bits
,
2357 .proc_handler
= proc_watchdog_cpumask
,
2359 #ifdef CONFIG_SOFTLOCKUP_DETECTOR
2361 .procname
= "soft_watchdog",
2362 .data
= &soft_watchdog_user_enabled
,
2363 .maxlen
= sizeof(int),
2365 .proc_handler
= proc_soft_watchdog
,
2366 .extra1
= SYSCTL_ZERO
,
2367 .extra2
= SYSCTL_ONE
,
2370 .procname
= "softlockup_panic",
2371 .data
= &softlockup_panic
,
2372 .maxlen
= sizeof(int),
2374 .proc_handler
= proc_dointvec_minmax
,
2375 .extra1
= SYSCTL_ZERO
,
2376 .extra2
= SYSCTL_ONE
,
2380 .procname
= "softlockup_all_cpu_backtrace",
2381 .data
= &sysctl_softlockup_all_cpu_backtrace
,
2382 .maxlen
= sizeof(int),
2384 .proc_handler
= proc_dointvec_minmax
,
2385 .extra1
= SYSCTL_ZERO
,
2386 .extra2
= SYSCTL_ONE
,
2388 #endif /* CONFIG_SMP */
2390 #ifdef CONFIG_HARDLOCKUP_DETECTOR
2392 .procname
= "hardlockup_panic",
2393 .data
= &hardlockup_panic
,
2394 .maxlen
= sizeof(int),
2396 .proc_handler
= proc_dointvec_minmax
,
2397 .extra1
= SYSCTL_ZERO
,
2398 .extra2
= SYSCTL_ONE
,
2402 .procname
= "hardlockup_all_cpu_backtrace",
2403 .data
= &sysctl_hardlockup_all_cpu_backtrace
,
2404 .maxlen
= sizeof(int),
2406 .proc_handler
= proc_dointvec_minmax
,
2407 .extra1
= SYSCTL_ZERO
,
2408 .extra2
= SYSCTL_ONE
,
2410 #endif /* CONFIG_SMP */
2414 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
2416 .procname
= "unknown_nmi_panic",
2417 .data
= &unknown_nmi_panic
,
2418 .maxlen
= sizeof (int),
2420 .proc_handler
= proc_dointvec
,
2424 #if (defined(CONFIG_X86_32) || defined(CONFIG_PARISC)) && \
2425 defined(CONFIG_DEBUG_STACKOVERFLOW)
2427 .procname
= "panic_on_stackoverflow",
2428 .data
= &sysctl_panic_on_stackoverflow
,
2429 .maxlen
= sizeof(int),
2431 .proc_handler
= proc_dointvec
,
2434 #if defined(CONFIG_X86)
2436 .procname
= "panic_on_unrecovered_nmi",
2437 .data
= &panic_on_unrecovered_nmi
,
2438 .maxlen
= sizeof(int),
2440 .proc_handler
= proc_dointvec
,
2443 .procname
= "panic_on_io_nmi",
2444 .data
= &panic_on_io_nmi
,
2445 .maxlen
= sizeof(int),
2447 .proc_handler
= proc_dointvec
,
2450 .procname
= "bootloader_type",
2451 .data
= &bootloader_type
,
2452 .maxlen
= sizeof (int),
2454 .proc_handler
= proc_dointvec
,
2457 .procname
= "bootloader_version",
2458 .data
= &bootloader_version
,
2459 .maxlen
= sizeof (int),
2461 .proc_handler
= proc_dointvec
,
2464 .procname
= "io_delay_type",
2465 .data
= &io_delay_type
,
2466 .maxlen
= sizeof(int),
2468 .proc_handler
= proc_dointvec
,
2471 #if defined(CONFIG_MMU)
2473 .procname
= "randomize_va_space",
2474 .data
= &randomize_va_space
,
2475 .maxlen
= sizeof(int),
2477 .proc_handler
= proc_dointvec
,
2480 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
2482 .procname
= "spin_retry",
2483 .data
= &spin_retry
,
2484 .maxlen
= sizeof (int),
2486 .proc_handler
= proc_dointvec
,
2489 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
2491 .procname
= "acpi_video_flags",
2492 .data
= &acpi_realmode_flags
,
2493 .maxlen
= sizeof (unsigned long),
2495 .proc_handler
= proc_doulongvec_minmax
,
2498 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
2500 .procname
= "ignore-unaligned-usertrap",
2501 .data
= &no_unaligned_warning
,
2502 .maxlen
= sizeof (int),
2504 .proc_handler
= proc_dointvec
,
2509 .procname
= "unaligned-dump-stack",
2510 .data
= &unaligned_dump_stack
,
2511 .maxlen
= sizeof (int),
2513 .proc_handler
= proc_dointvec
,
2516 #ifdef CONFIG_DETECT_HUNG_TASK
2519 .procname
= "hung_task_all_cpu_backtrace",
2520 .data
= &sysctl_hung_task_all_cpu_backtrace
,
2521 .maxlen
= sizeof(int),
2523 .proc_handler
= proc_dointvec_minmax
,
2524 .extra1
= SYSCTL_ZERO
,
2525 .extra2
= SYSCTL_ONE
,
2527 #endif /* CONFIG_SMP */
2529 .procname
= "hung_task_panic",
2530 .data
= &sysctl_hung_task_panic
,
2531 .maxlen
= sizeof(int),
2533 .proc_handler
= proc_dointvec_minmax
,
2534 .extra1
= SYSCTL_ZERO
,
2535 .extra2
= SYSCTL_ONE
,
2538 .procname
= "hung_task_check_count",
2539 .data
= &sysctl_hung_task_check_count
,
2540 .maxlen
= sizeof(int),
2542 .proc_handler
= proc_dointvec_minmax
,
2543 .extra1
= SYSCTL_ZERO
,
2546 .procname
= "hung_task_timeout_secs",
2547 .data
= &sysctl_hung_task_timeout_secs
,
2548 .maxlen
= sizeof(unsigned long),
2550 .proc_handler
= proc_dohung_task_timeout_secs
,
2551 .extra2
= &hung_task_timeout_max
,
2554 .procname
= "hung_task_check_interval_secs",
2555 .data
= &sysctl_hung_task_check_interval_secs
,
2556 .maxlen
= sizeof(unsigned long),
2558 .proc_handler
= proc_dohung_task_timeout_secs
,
2559 .extra2
= &hung_task_timeout_max
,
2562 .procname
= "hung_task_warnings",
2563 .data
= &sysctl_hung_task_warnings
,
2564 .maxlen
= sizeof(int),
2566 .proc_handler
= proc_dointvec_minmax
,
2570 #ifdef CONFIG_RT_MUTEXES
2572 .procname
= "max_lock_depth",
2573 .data
= &max_lock_depth
,
2574 .maxlen
= sizeof(int),
2576 .proc_handler
= proc_dointvec
,
2580 .procname
= "poweroff_cmd",
2581 .data
= &poweroff_cmd
,
2582 .maxlen
= POWEROFF_CMD_PATH_LEN
,
2584 .proc_handler
= proc_dostring
,
2590 .child
= key_sysctls
,
2593 #ifdef CONFIG_PERF_EVENTS
2595 * User-space scripts rely on the existence of this file
2596 * as a feature check for perf_events being enabled.
2598 * So it's an ABI, do not remove!
2601 .procname
= "perf_event_paranoid",
2602 .data
= &sysctl_perf_event_paranoid
,
2603 .maxlen
= sizeof(sysctl_perf_event_paranoid
),
2605 .proc_handler
= proc_dointvec
,
2608 .procname
= "perf_event_mlock_kb",
2609 .data
= &sysctl_perf_event_mlock
,
2610 .maxlen
= sizeof(sysctl_perf_event_mlock
),
2612 .proc_handler
= proc_dointvec
,
2615 .procname
= "perf_event_max_sample_rate",
2616 .data
= &sysctl_perf_event_sample_rate
,
2617 .maxlen
= sizeof(sysctl_perf_event_sample_rate
),
2619 .proc_handler
= perf_proc_update_handler
,
2620 .extra1
= SYSCTL_ONE
,
2623 .procname
= "perf_cpu_time_max_percent",
2624 .data
= &sysctl_perf_cpu_time_max_percent
,
2625 .maxlen
= sizeof(sysctl_perf_cpu_time_max_percent
),
2627 .proc_handler
= perf_cpu_time_max_percent_handler
,
2628 .extra1
= SYSCTL_ZERO
,
2629 .extra2
= &one_hundred
,
2632 .procname
= "perf_event_max_stack",
2633 .data
= &sysctl_perf_event_max_stack
,
2634 .maxlen
= sizeof(sysctl_perf_event_max_stack
),
2636 .proc_handler
= perf_event_max_stack_handler
,
2637 .extra1
= SYSCTL_ZERO
,
2638 .extra2
= &six_hundred_forty_kb
,
2641 .procname
= "perf_event_max_contexts_per_stack",
2642 .data
= &sysctl_perf_event_max_contexts_per_stack
,
2643 .maxlen
= sizeof(sysctl_perf_event_max_contexts_per_stack
),
2645 .proc_handler
= perf_event_max_stack_handler
,
2646 .extra1
= SYSCTL_ZERO
,
2647 .extra2
= &one_thousand
,
2651 .procname
= "panic_on_warn",
2652 .data
= &panic_on_warn
,
2653 .maxlen
= sizeof(int),
2655 .proc_handler
= proc_dointvec_minmax
,
2656 .extra1
= SYSCTL_ZERO
,
2657 .extra2
= SYSCTL_ONE
,
2659 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
2661 .procname
= "timer_migration",
2662 .data
= &sysctl_timer_migration
,
2663 .maxlen
= sizeof(unsigned int),
2665 .proc_handler
= timer_migration_handler
,
2666 .extra1
= SYSCTL_ZERO
,
2667 .extra2
= SYSCTL_ONE
,
2670 #ifdef CONFIG_BPF_SYSCALL
2672 .procname
= "unprivileged_bpf_disabled",
2673 .data
= &sysctl_unprivileged_bpf_disabled
,
2674 .maxlen
= sizeof(sysctl_unprivileged_bpf_disabled
),
2676 .proc_handler
= bpf_unpriv_handler
,
2677 .extra1
= SYSCTL_ZERO
,
2681 .procname
= "bpf_stats_enabled",
2682 .data
= &bpf_stats_enabled_key
.key
,
2683 .maxlen
= sizeof(bpf_stats_enabled_key
),
2685 .proc_handler
= bpf_stats_handler
,
2688 #if defined(CONFIG_TREE_RCU)
2690 .procname
= "panic_on_rcu_stall",
2691 .data
= &sysctl_panic_on_rcu_stall
,
2692 .maxlen
= sizeof(sysctl_panic_on_rcu_stall
),
2694 .proc_handler
= proc_dointvec_minmax
,
2695 .extra1
= SYSCTL_ZERO
,
2696 .extra2
= SYSCTL_ONE
,
2699 #if defined(CONFIG_TREE_RCU)
2701 .procname
= "max_rcu_stall_to_panic",
2702 .data
= &sysctl_max_rcu_stall_to_panic
,
2703 .maxlen
= sizeof(sysctl_max_rcu_stall_to_panic
),
2705 .proc_handler
= proc_dointvec_minmax
,
2706 .extra1
= SYSCTL_ONE
,
2707 .extra2
= SYSCTL_INT_MAX
,
2710 #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
2712 .procname
= "stack_erasing",
2714 .maxlen
= sizeof(int),
2716 .proc_handler
= stack_erasing_sysctl
,
2717 .extra1
= SYSCTL_ZERO
,
2718 .extra2
= SYSCTL_ONE
,
2724 static struct ctl_table vm_table
[] = {
2726 .procname
= "overcommit_memory",
2727 .data
= &sysctl_overcommit_memory
,
2728 .maxlen
= sizeof(sysctl_overcommit_memory
),
2730 .proc_handler
= overcommit_policy_handler
,
2731 .extra1
= SYSCTL_ZERO
,
2735 .procname
= "panic_on_oom",
2736 .data
= &sysctl_panic_on_oom
,
2737 .maxlen
= sizeof(sysctl_panic_on_oom
),
2739 .proc_handler
= proc_dointvec_minmax
,
2740 .extra1
= SYSCTL_ZERO
,
2744 .procname
= "oom_kill_allocating_task",
2745 .data
= &sysctl_oom_kill_allocating_task
,
2746 .maxlen
= sizeof(sysctl_oom_kill_allocating_task
),
2748 .proc_handler
= proc_dointvec
,
2751 .procname
= "oom_dump_tasks",
2752 .data
= &sysctl_oom_dump_tasks
,
2753 .maxlen
= sizeof(sysctl_oom_dump_tasks
),
2755 .proc_handler
= proc_dointvec
,
2758 .procname
= "overcommit_ratio",
2759 .data
= &sysctl_overcommit_ratio
,
2760 .maxlen
= sizeof(sysctl_overcommit_ratio
),
2762 .proc_handler
= overcommit_ratio_handler
,
2765 .procname
= "overcommit_kbytes",
2766 .data
= &sysctl_overcommit_kbytes
,
2767 .maxlen
= sizeof(sysctl_overcommit_kbytes
),
2769 .proc_handler
= overcommit_kbytes_handler
,
2772 .procname
= "page-cluster",
2773 .data
= &page_cluster
,
2774 .maxlen
= sizeof(int),
2776 .proc_handler
= proc_dointvec_minmax
,
2777 .extra1
= SYSCTL_ZERO
,
2780 .procname
= "dirty_background_ratio",
2781 .data
= &dirty_background_ratio
,
2782 .maxlen
= sizeof(dirty_background_ratio
),
2784 .proc_handler
= dirty_background_ratio_handler
,
2785 .extra1
= SYSCTL_ZERO
,
2786 .extra2
= &one_hundred
,
2789 .procname
= "dirty_background_bytes",
2790 .data
= &dirty_background_bytes
,
2791 .maxlen
= sizeof(dirty_background_bytes
),
2793 .proc_handler
= dirty_background_bytes_handler
,
2797 .procname
= "dirty_ratio",
2798 .data
= &vm_dirty_ratio
,
2799 .maxlen
= sizeof(vm_dirty_ratio
),
2801 .proc_handler
= dirty_ratio_handler
,
2802 .extra1
= SYSCTL_ZERO
,
2803 .extra2
= &one_hundred
,
2806 .procname
= "dirty_bytes",
2807 .data
= &vm_dirty_bytes
,
2808 .maxlen
= sizeof(vm_dirty_bytes
),
2810 .proc_handler
= dirty_bytes_handler
,
2811 .extra1
= &dirty_bytes_min
,
2814 .procname
= "dirty_writeback_centisecs",
2815 .data
= &dirty_writeback_interval
,
2816 .maxlen
= sizeof(dirty_writeback_interval
),
2818 .proc_handler
= dirty_writeback_centisecs_handler
,
2821 .procname
= "dirty_expire_centisecs",
2822 .data
= &dirty_expire_interval
,
2823 .maxlen
= sizeof(dirty_expire_interval
),
2825 .proc_handler
= proc_dointvec_minmax
,
2826 .extra1
= SYSCTL_ZERO
,
2829 .procname
= "dirtytime_expire_seconds",
2830 .data
= &dirtytime_expire_interval
,
2831 .maxlen
= sizeof(dirtytime_expire_interval
),
2833 .proc_handler
= dirtytime_interval_handler
,
2834 .extra1
= SYSCTL_ZERO
,
2837 .procname
= "swappiness",
2838 .data
= &vm_swappiness
,
2839 .maxlen
= sizeof(vm_swappiness
),
2841 .proc_handler
= proc_dointvec_minmax
,
2842 .extra1
= SYSCTL_ZERO
,
2843 .extra2
= &two_hundred
,
2845 #ifdef CONFIG_HUGETLB_PAGE
2847 .procname
= "nr_hugepages",
2849 .maxlen
= sizeof(unsigned long),
2851 .proc_handler
= hugetlb_sysctl_handler
,
2855 .procname
= "nr_hugepages_mempolicy",
2857 .maxlen
= sizeof(unsigned long),
2859 .proc_handler
= &hugetlb_mempolicy_sysctl_handler
,
2862 .procname
= "numa_stat",
2863 .data
= &sysctl_vm_numa_stat
,
2864 .maxlen
= sizeof(int),
2866 .proc_handler
= sysctl_vm_numa_stat_handler
,
2867 .extra1
= SYSCTL_ZERO
,
2868 .extra2
= SYSCTL_ONE
,
2872 .procname
= "hugetlb_shm_group",
2873 .data
= &sysctl_hugetlb_shm_group
,
2874 .maxlen
= sizeof(gid_t
),
2876 .proc_handler
= proc_dointvec
,
2879 .procname
= "nr_overcommit_hugepages",
2881 .maxlen
= sizeof(unsigned long),
2883 .proc_handler
= hugetlb_overcommit_handler
,
2887 .procname
= "lowmem_reserve_ratio",
2888 .data
= &sysctl_lowmem_reserve_ratio
,
2889 .maxlen
= sizeof(sysctl_lowmem_reserve_ratio
),
2891 .proc_handler
= lowmem_reserve_ratio_sysctl_handler
,
2894 .procname
= "drop_caches",
2895 .data
= &sysctl_drop_caches
,
2896 .maxlen
= sizeof(int),
2898 .proc_handler
= drop_caches_sysctl_handler
,
2899 .extra1
= SYSCTL_ONE
,
2902 #ifdef CONFIG_COMPACTION
2904 .procname
= "compact_memory",
2906 .maxlen
= sizeof(int),
2908 .proc_handler
= sysctl_compaction_handler
,
2911 .procname
= "compaction_proactiveness",
2912 .data
= &sysctl_compaction_proactiveness
,
2913 .maxlen
= sizeof(sysctl_compaction_proactiveness
),
2915 .proc_handler
= compaction_proactiveness_sysctl_handler
,
2916 .extra1
= SYSCTL_ZERO
,
2917 .extra2
= &one_hundred
,
2920 .procname
= "extfrag_threshold",
2921 .data
= &sysctl_extfrag_threshold
,
2922 .maxlen
= sizeof(int),
2924 .proc_handler
= proc_dointvec_minmax
,
2925 .extra1
= &min_extfrag_threshold
,
2926 .extra2
= &max_extfrag_threshold
,
2929 .procname
= "compact_unevictable_allowed",
2930 .data
= &sysctl_compact_unevictable_allowed
,
2931 .maxlen
= sizeof(int),
2933 .proc_handler
= proc_dointvec_minmax_warn_RT_change
,
2934 .extra1
= SYSCTL_ZERO
,
2935 .extra2
= SYSCTL_ONE
,
2938 #endif /* CONFIG_COMPACTION */
2940 .procname
= "min_free_kbytes",
2941 .data
= &min_free_kbytes
,
2942 .maxlen
= sizeof(min_free_kbytes
),
2944 .proc_handler
= min_free_kbytes_sysctl_handler
,
2945 .extra1
= SYSCTL_ZERO
,
2948 .procname
= "watermark_boost_factor",
2949 .data
= &watermark_boost_factor
,
2950 .maxlen
= sizeof(watermark_boost_factor
),
2952 .proc_handler
= proc_dointvec_minmax
,
2953 .extra1
= SYSCTL_ZERO
,
2956 .procname
= "watermark_scale_factor",
2957 .data
= &watermark_scale_factor
,
2958 .maxlen
= sizeof(watermark_scale_factor
),
2960 .proc_handler
= watermark_scale_factor_sysctl_handler
,
2961 .extra1
= SYSCTL_ONE
,
2962 .extra2
= &one_thousand
,
2965 .procname
= "percpu_pagelist_high_fraction",
2966 .data
= &percpu_pagelist_high_fraction
,
2967 .maxlen
= sizeof(percpu_pagelist_high_fraction
),
2969 .proc_handler
= percpu_pagelist_high_fraction_sysctl_handler
,
2970 .extra1
= SYSCTL_ZERO
,
2973 .procname
= "page_lock_unfairness",
2974 .data
= &sysctl_page_lock_unfairness
,
2975 .maxlen
= sizeof(sysctl_page_lock_unfairness
),
2977 .proc_handler
= proc_dointvec_minmax
,
2978 .extra1
= SYSCTL_ZERO
,
2982 .procname
= "max_map_count",
2983 .data
= &sysctl_max_map_count
,
2984 .maxlen
= sizeof(sysctl_max_map_count
),
2986 .proc_handler
= proc_dointvec_minmax
,
2987 .extra1
= SYSCTL_ZERO
,
2991 .procname
= "nr_trim_pages",
2992 .data
= &sysctl_nr_trim_pages
,
2993 .maxlen
= sizeof(sysctl_nr_trim_pages
),
2995 .proc_handler
= proc_dointvec_minmax
,
2996 .extra1
= SYSCTL_ZERO
,
3000 .procname
= "laptop_mode",
3001 .data
= &laptop_mode
,
3002 .maxlen
= sizeof(laptop_mode
),
3004 .proc_handler
= proc_dointvec_jiffies
,
3007 .procname
= "vfs_cache_pressure",
3008 .data
= &sysctl_vfs_cache_pressure
,
3009 .maxlen
= sizeof(sysctl_vfs_cache_pressure
),
3011 .proc_handler
= proc_dointvec_minmax
,
3012 .extra1
= SYSCTL_ZERO
,
3014 #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
3015 defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
3017 .procname
= "legacy_va_layout",
3018 .data
= &sysctl_legacy_va_layout
,
3019 .maxlen
= sizeof(sysctl_legacy_va_layout
),
3021 .proc_handler
= proc_dointvec_minmax
,
3022 .extra1
= SYSCTL_ZERO
,
3027 .procname
= "zone_reclaim_mode",
3028 .data
= &node_reclaim_mode
,
3029 .maxlen
= sizeof(node_reclaim_mode
),
3031 .proc_handler
= proc_dointvec_minmax
,
3032 .extra1
= SYSCTL_ZERO
,
3035 .procname
= "min_unmapped_ratio",
3036 .data
= &sysctl_min_unmapped_ratio
,
3037 .maxlen
= sizeof(sysctl_min_unmapped_ratio
),
3039 .proc_handler
= sysctl_min_unmapped_ratio_sysctl_handler
,
3040 .extra1
= SYSCTL_ZERO
,
3041 .extra2
= &one_hundred
,
3044 .procname
= "min_slab_ratio",
3045 .data
= &sysctl_min_slab_ratio
,
3046 .maxlen
= sizeof(sysctl_min_slab_ratio
),
3048 .proc_handler
= sysctl_min_slab_ratio_sysctl_handler
,
3049 .extra1
= SYSCTL_ZERO
,
3050 .extra2
= &one_hundred
,
3055 .procname
= "stat_interval",
3056 .data
= &sysctl_stat_interval
,
3057 .maxlen
= sizeof(sysctl_stat_interval
),
3059 .proc_handler
= proc_dointvec_jiffies
,
3062 .procname
= "stat_refresh",
3066 .proc_handler
= vmstat_refresh
,
3071 .procname
= "mmap_min_addr",
3072 .data
= &dac_mmap_min_addr
,
3073 .maxlen
= sizeof(unsigned long),
3075 .proc_handler
= mmap_min_addr_handler
,
3080 .procname
= "numa_zonelist_order",
3081 .data
= &numa_zonelist_order
,
3082 .maxlen
= NUMA_ZONELIST_ORDER_LEN
,
3084 .proc_handler
= numa_zonelist_order_handler
,
3087 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
3088 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
3090 .procname
= "vdso_enabled",
3091 #ifdef CONFIG_X86_32
3092 .data
= &vdso32_enabled
,
3093 .maxlen
= sizeof(vdso32_enabled
),
3095 .data
= &vdso_enabled
,
3096 .maxlen
= sizeof(vdso_enabled
),
3099 .proc_handler
= proc_dointvec
,
3100 .extra1
= SYSCTL_ZERO
,
3103 #ifdef CONFIG_HIGHMEM
3105 .procname
= "highmem_is_dirtyable",
3106 .data
= &vm_highmem_is_dirtyable
,
3107 .maxlen
= sizeof(vm_highmem_is_dirtyable
),
3109 .proc_handler
= proc_dointvec_minmax
,
3110 .extra1
= SYSCTL_ZERO
,
3111 .extra2
= SYSCTL_ONE
,
3114 #ifdef CONFIG_MEMORY_FAILURE
3116 .procname
= "memory_failure_early_kill",
3117 .data
= &sysctl_memory_failure_early_kill
,
3118 .maxlen
= sizeof(sysctl_memory_failure_early_kill
),
3120 .proc_handler
= proc_dointvec_minmax
,
3121 .extra1
= SYSCTL_ZERO
,
3122 .extra2
= SYSCTL_ONE
,
3125 .procname
= "memory_failure_recovery",
3126 .data
= &sysctl_memory_failure_recovery
,
3127 .maxlen
= sizeof(sysctl_memory_failure_recovery
),
3129 .proc_handler
= proc_dointvec_minmax
,
3130 .extra1
= SYSCTL_ZERO
,
3131 .extra2
= SYSCTL_ONE
,
3135 .procname
= "user_reserve_kbytes",
3136 .data
= &sysctl_user_reserve_kbytes
,
3137 .maxlen
= sizeof(sysctl_user_reserve_kbytes
),
3139 .proc_handler
= proc_doulongvec_minmax
,
3142 .procname
= "admin_reserve_kbytes",
3143 .data
= &sysctl_admin_reserve_kbytes
,
3144 .maxlen
= sizeof(sysctl_admin_reserve_kbytes
),
3146 .proc_handler
= proc_doulongvec_minmax
,
3148 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS
3150 .procname
= "mmap_rnd_bits",
3151 .data
= &mmap_rnd_bits
,
3152 .maxlen
= sizeof(mmap_rnd_bits
),
3154 .proc_handler
= proc_dointvec_minmax
,
3155 .extra1
= (void *)&mmap_rnd_bits_min
,
3156 .extra2
= (void *)&mmap_rnd_bits_max
,
3159 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
3161 .procname
= "mmap_rnd_compat_bits",
3162 .data
= &mmap_rnd_compat_bits
,
3163 .maxlen
= sizeof(mmap_rnd_compat_bits
),
3165 .proc_handler
= proc_dointvec_minmax
,
3166 .extra1
= (void *)&mmap_rnd_compat_bits_min
,
3167 .extra2
= (void *)&mmap_rnd_compat_bits_max
,
3170 #ifdef CONFIG_USERFAULTFD
3172 .procname
= "unprivileged_userfaultfd",
3173 .data
= &sysctl_unprivileged_userfaultfd
,
3174 .maxlen
= sizeof(sysctl_unprivileged_userfaultfd
),
3176 .proc_handler
= proc_dointvec_minmax
,
3177 .extra1
= SYSCTL_ZERO
,
3178 .extra2
= SYSCTL_ONE
,
3184 static struct ctl_table fs_table
[] = {
3186 .procname
= "inode-nr",
3187 .data
= &inodes_stat
,
3188 .maxlen
= 2*sizeof(long),
3190 .proc_handler
= proc_nr_inodes
,
3193 .procname
= "inode-state",
3194 .data
= &inodes_stat
,
3195 .maxlen
= 7*sizeof(long),
3197 .proc_handler
= proc_nr_inodes
,
3200 .procname
= "file-nr",
3201 .data
= &files_stat
,
3202 .maxlen
= sizeof(files_stat
),
3204 .proc_handler
= proc_nr_files
,
3207 .procname
= "file-max",
3208 .data
= &files_stat
.max_files
,
3209 .maxlen
= sizeof(files_stat
.max_files
),
3211 .proc_handler
= proc_doulongvec_minmax
,
3213 .extra2
= &long_max
,
3216 .procname
= "nr_open",
3217 .data
= &sysctl_nr_open
,
3218 .maxlen
= sizeof(unsigned int),
3220 .proc_handler
= proc_dointvec_minmax
,
3221 .extra1
= &sysctl_nr_open_min
,
3222 .extra2
= &sysctl_nr_open_max
,
3225 .procname
= "dentry-state",
3226 .data
= &dentry_stat
,
3227 .maxlen
= 6*sizeof(long),
3229 .proc_handler
= proc_nr_dentry
,
3232 .procname
= "overflowuid",
3233 .data
= &fs_overflowuid
,
3234 .maxlen
= sizeof(int),
3236 .proc_handler
= proc_dointvec_minmax
,
3237 .extra1
= &minolduid
,
3238 .extra2
= &maxolduid
,
3241 .procname
= "overflowgid",
3242 .data
= &fs_overflowgid
,
3243 .maxlen
= sizeof(int),
3245 .proc_handler
= proc_dointvec_minmax
,
3246 .extra1
= &minolduid
,
3247 .extra2
= &maxolduid
,
3249 #ifdef CONFIG_FILE_LOCKING
3251 .procname
= "leases-enable",
3252 .data
= &leases_enable
,
3253 .maxlen
= sizeof(int),
3255 .proc_handler
= proc_dointvec
,
3258 #ifdef CONFIG_DNOTIFY
3260 .procname
= "dir-notify-enable",
3261 .data
= &dir_notify_enable
,
3262 .maxlen
= sizeof(int),
3264 .proc_handler
= proc_dointvec
,
3268 #ifdef CONFIG_FILE_LOCKING
3270 .procname
= "lease-break-time",
3271 .data
= &lease_break_time
,
3272 .maxlen
= sizeof(int),
3274 .proc_handler
= proc_dointvec
,
3279 .procname
= "aio-nr",
3281 .maxlen
= sizeof(aio_nr
),
3283 .proc_handler
= proc_doulongvec_minmax
,
3286 .procname
= "aio-max-nr",
3287 .data
= &aio_max_nr
,
3288 .maxlen
= sizeof(aio_max_nr
),
3290 .proc_handler
= proc_doulongvec_minmax
,
3292 #endif /* CONFIG_AIO */
3293 #ifdef CONFIG_INOTIFY_USER
3295 .procname
= "inotify",
3297 .child
= inotify_table
,
3300 #ifdef CONFIG_FANOTIFY
3302 .procname
= "fanotify",
3304 .child
= fanotify_table
,
3309 .procname
= "epoll",
3311 .child
= epoll_table
,
3316 .procname
= "protected_symlinks",
3317 .data
= &sysctl_protected_symlinks
,
3318 .maxlen
= sizeof(int),
3320 .proc_handler
= proc_dointvec_minmax
,
3321 .extra1
= SYSCTL_ZERO
,
3322 .extra2
= SYSCTL_ONE
,
3325 .procname
= "protected_hardlinks",
3326 .data
= &sysctl_protected_hardlinks
,
3327 .maxlen
= sizeof(int),
3329 .proc_handler
= proc_dointvec_minmax
,
3330 .extra1
= SYSCTL_ZERO
,
3331 .extra2
= SYSCTL_ONE
,
3334 .procname
= "protected_fifos",
3335 .data
= &sysctl_protected_fifos
,
3336 .maxlen
= sizeof(int),
3338 .proc_handler
= proc_dointvec_minmax
,
3339 .extra1
= SYSCTL_ZERO
,
3343 .procname
= "protected_regular",
3344 .data
= &sysctl_protected_regular
,
3345 .maxlen
= sizeof(int),
3347 .proc_handler
= proc_dointvec_minmax
,
3348 .extra1
= SYSCTL_ZERO
,
3352 .procname
= "suid_dumpable",
3353 .data
= &suid_dumpable
,
3354 .maxlen
= sizeof(int),
3356 .proc_handler
= proc_dointvec_minmax_coredump
,
3357 .extra1
= SYSCTL_ZERO
,
3360 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
3362 .procname
= "binfmt_misc",
3364 .child
= sysctl_mount_point
,
3368 .procname
= "pipe-max-size",
3369 .data
= &pipe_max_size
,
3370 .maxlen
= sizeof(pipe_max_size
),
3372 .proc_handler
= proc_dopipe_max_size
,
3375 .procname
= "pipe-user-pages-hard",
3376 .data
= &pipe_user_pages_hard
,
3377 .maxlen
= sizeof(pipe_user_pages_hard
),
3379 .proc_handler
= proc_doulongvec_minmax
,
3382 .procname
= "pipe-user-pages-soft",
3383 .data
= &pipe_user_pages_soft
,
3384 .maxlen
= sizeof(pipe_user_pages_soft
),
3386 .proc_handler
= proc_doulongvec_minmax
,
3389 .procname
= "mount-max",
3390 .data
= &sysctl_mount_max
,
3391 .maxlen
= sizeof(unsigned int),
3393 .proc_handler
= proc_dointvec_minmax
,
3394 .extra1
= SYSCTL_ONE
,
3399 static struct ctl_table debug_table
[] = {
3400 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
3402 .procname
= "exception-trace",
3403 .data
= &show_unhandled_signals
,
3404 .maxlen
= sizeof(int),
3406 .proc_handler
= proc_dointvec
3409 #if defined(CONFIG_OPTPROBES)
3411 .procname
= "kprobes-optimization",
3412 .data
= &sysctl_kprobes_optimization
,
3413 .maxlen
= sizeof(int),
3415 .proc_handler
= proc_kprobes_optimization_handler
,
3416 .extra1
= SYSCTL_ZERO
,
3417 .extra2
= SYSCTL_ONE
,
3423 static struct ctl_table dev_table
[] = {
3427 static struct ctl_table sysctl_base_table
[] = {
3429 .procname
= "kernel",
3431 .child
= kern_table
,
3444 .procname
= "debug",
3446 .child
= debug_table
,
3456 int __init
sysctl_init(void)
3458 struct ctl_table_header
*hdr
;
3460 hdr
= register_sysctl_table(sysctl_base_table
);
3461 kmemleak_not_leak(hdr
);
3464 #endif /* CONFIG_SYSCTL */
3466 * No sense putting this after each symbol definition, twice,
3467 * exception granted :-)
3469 EXPORT_SYMBOL(proc_dobool
);
3470 EXPORT_SYMBOL(proc_dointvec
);
3471 EXPORT_SYMBOL(proc_douintvec
);
3472 EXPORT_SYMBOL(proc_dointvec_jiffies
);
3473 EXPORT_SYMBOL(proc_dointvec_minmax
);
3474 EXPORT_SYMBOL_GPL(proc_douintvec_minmax
);
3475 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies
);
3476 EXPORT_SYMBOL(proc_dointvec_ms_jiffies
);
3477 EXPORT_SYMBOL(proc_dostring
);
3478 EXPORT_SYMBOL(proc_doulongvec_minmax
);
3479 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax
);
3480 EXPORT_SYMBOL(proc_do_large_bitmap
);