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/printk.h>
31 #include <linux/proc_fs.h>
32 #include <linux/security.h>
33 #include <linux/ctype.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/sched/coredump.h>
67 #include <linux/kexec.h>
68 #include <linux/bpf.h>
69 #include <linux/mount.h>
70 #include <linux/userfaultfd_k.h>
71 #include <linux/coredump.h>
72 #include <linux/latencytop.h>
73 #include <linux/pid.h>
75 #include "../lib/kstrtox.h"
77 #include <linux/uaccess.h>
78 #include <asm/processor.h>
82 #include <asm/stacktrace.h>
86 #include <asm/setup.h>
88 #ifdef CONFIG_BSD_PROCESS_ACCT
89 #include <linux/acct.h>
91 #ifdef CONFIG_RT_MUTEXES
92 #include <linux/rtmutex.h>
94 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT)
95 #include <linux/lockdep.h>
97 #ifdef CONFIG_CHR_DEV_SG
100 #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
101 #include <linux/stackleak.h>
103 #ifdef CONFIG_LOCKUP_DETECTOR
104 #include <linux/nmi.h>
107 #if defined(CONFIG_SYSCTL)
109 /* Constants used for minimum and maximum */
110 #ifdef CONFIG_LOCKUP_DETECTOR
111 static int sixty = 60;
114 static int __maybe_unused neg_one = -1;
115 static int __maybe_unused two = 2;
116 static int __maybe_unused four = 4;
117 static unsigned long zero_ul;
118 static unsigned long one_ul = 1;
119 static unsigned long long_max = LONG_MAX;
120 static int one_hundred = 100;
121 static int two_hundred = 200;
122 static int one_thousand = 1000;
124 static int ten_thousand = 10000;
126 #ifdef CONFIG_PERF_EVENTS
127 static int six_hundred_forty_kb = 640 * 1024;
130 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
131 static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
133 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
134 static int maxolduid = 65535;
135 static int minolduid;
137 static int ngroups_max = NGROUPS_MAX;
138 static const int cap_last_cap = CAP_LAST_CAP;
141 * This is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs
142 * and hung_task_check_interval_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>
152 #ifdef CONFIG_PROC_SYSCTL
155 * enum sysctl_writes_mode - supported sysctl write modes
157 * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value
158 * to be written, and multiple writes on the same sysctl file descriptor
159 * will rewrite the sysctl value, regardless of file position. No warning
160 * is issued when the initial position is not 0.
161 * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is
163 * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at
164 * file position 0 and the value must be fully contained in the buffer
165 * sent to the write syscall. If dealing with strings respect the file
166 * position, but restrict this to the max length of the buffer, anything
167 * passed the max length will be ignored. Multiple writes will append
170 * These write modes control how current file position affects the behavior of
171 * updating sysctl values through the proc interface on each write.
173 enum sysctl_writes_mode {
174 SYSCTL_WRITES_LEGACY = -1,
175 SYSCTL_WRITES_WARN = 0,
176 SYSCTL_WRITES_STRICT = 1,
179 static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT;
180 #endif /* CONFIG_PROC_SYSCTL */
182 #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
183 defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
184 int sysctl_legacy_va_layout;
187 #ifdef CONFIG_SCHED_DEBUG
188 static int min_sched_granularity_ns = 100000; /* 100 usecs */
189 static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
190 static int min_wakeup_granularity_ns; /* 0 usecs */
191 static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */
193 static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
194 static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
195 #endif /* CONFIG_SMP */
196 #endif /* CONFIG_SCHED_DEBUG */
198 #ifdef CONFIG_COMPACTION
199 static int min_extfrag_threshold;
200 static int max_extfrag_threshold = 1000;
203 #endif /* CONFIG_SYSCTL */
205 #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL)
206 static int bpf_stats_handler(struct ctl_table *table, int write,
207 void __user *buffer, size_t *lenp,
210 struct static_key *key = (struct static_key *)table->data;
211 static int saved_val;
213 struct ctl_table tmp = {
215 .maxlen = sizeof(val),
217 .extra1 = SYSCTL_ZERO,
218 .extra2 = SYSCTL_ONE,
221 if (write && !capable(CAP_SYS_ADMIN))
224 mutex_lock(&bpf_stats_enabled_mutex);
226 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
227 if (write && !ret && val != saved_val) {
229 static_key_slow_inc(key);
231 static_key_slow_dec(key);
234 mutex_unlock(&bpf_stats_enabled_mutex);
243 #ifdef CONFIG_PROC_SYSCTL
245 static int _proc_do_string(char *data, int maxlen, int write,
246 char *buffer, size_t *lenp, loff_t *ppos)
251 if (!data || !maxlen || !*lenp) {
257 if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) {
258 /* Only continue writes not past the end of buffer. */
260 if (len > maxlen - 1)
267 /* Start writing from beginning of buffer. */
273 while ((p - buffer) < *lenp && len < maxlen - 1) {
275 if (c == 0 || c == '\n')
296 memcpy(buffer, data, len);
307 static void warn_sysctl_write(struct ctl_table *table)
309 pr_warn_once("%s wrote to %s when file position was not 0!\n"
310 "This will not be supported in the future. To silence this\n"
311 "warning, set kernel.sysctl_writes_strict = -1\n",
312 current->comm, table->procname);
316 * proc_first_pos_non_zero_ignore - check if first position is allowed
317 * @ppos: file position
318 * @table: the sysctl table
320 * Returns true if the first position is non-zero and the sysctl_writes_strict
321 * mode indicates this is not allowed for numeric input types. String proc
322 * handlers can ignore the return value.
324 static bool proc_first_pos_non_zero_ignore(loff_t *ppos,
325 struct ctl_table *table)
330 switch (sysctl_writes_strict) {
331 case SYSCTL_WRITES_STRICT:
333 case SYSCTL_WRITES_WARN:
334 warn_sysctl_write(table);
342 * proc_dostring - read a string sysctl
343 * @table: the sysctl table
344 * @write: %TRUE if this is a write to the sysctl file
345 * @buffer: the user buffer
346 * @lenp: the size of the user buffer
347 * @ppos: file position
349 * Reads/writes a string from/to the user buffer. If the kernel
350 * buffer provided is not large enough to hold the string, the
351 * string is truncated. The copied string is %NULL-terminated.
352 * If the string is being read by the user process, it is copied
353 * and a newline '\n' is added. It is truncated if the buffer is
356 * Returns 0 on success.
358 int proc_dostring(struct ctl_table *table, int write,
359 void *buffer, size_t *lenp, loff_t *ppos)
362 proc_first_pos_non_zero_ignore(ppos, table);
364 return _proc_do_string(table->data, table->maxlen, write, buffer, lenp,
368 static size_t proc_skip_spaces(char **buf)
371 char *tmp = skip_spaces(*buf);
377 static void proc_skip_char(char **buf, size_t *size, const char v)
388 * strtoul_lenient - parse an ASCII formatted integer from a buffer and only
391 * @cp: kernel buffer containing the string to parse
392 * @endp: pointer to store the trailing characters
393 * @base: the base to use
394 * @res: where the parsed integer will be stored
396 * In case of success 0 is returned and @res will contain the parsed integer,
397 * @endp will hold any trailing characters.
398 * This function will fail the parse on overflow. If there wasn't an overflow
399 * the function will defer the decision what characters count as invalid to the
402 static int strtoul_lenient(const char *cp, char **endp, unsigned int base,
405 unsigned long long result;
408 cp = _parse_integer_fixup_radix(cp, &base);
409 rv = _parse_integer(cp, base, &result);
410 if ((rv & KSTRTOX_OVERFLOW) || (result != (unsigned long)result))
418 *res = (unsigned long)result;
424 * proc_get_long - reads an ASCII formatted integer from a user buffer
426 * @buf: a kernel buffer
427 * @size: size of the kernel buffer
428 * @val: this is where the number will be stored
429 * @neg: set to %TRUE if number is negative
430 * @perm_tr: a vector which contains the allowed trailers
431 * @perm_tr_len: size of the perm_tr vector
432 * @tr: pointer to store the trailer character
434 * In case of success %0 is returned and @buf and @size are updated with
435 * the amount of bytes read. If @tr is non-NULL and a trailing
436 * character exists (size is non-zero after returning from this
437 * function), @tr is updated with the trailing character.
439 static int proc_get_long(char **buf, size_t *size,
440 unsigned long *val, bool *neg,
441 const char *perm_tr, unsigned perm_tr_len, char *tr)
444 char *p, tmp[TMPBUFLEN];
450 if (len > TMPBUFLEN - 1)
453 memcpy(tmp, *buf, len);
457 if (*p == '-' && *size > 1) {
465 if (strtoul_lenient(p, &p, 0, val))
470 /* We don't know if the next char is whitespace thus we may accept
471 * invalid integers (e.g. 1234...a) or two integers instead of one
472 * (e.g. 123...1). So lets not allow such large numbers. */
473 if (len == TMPBUFLEN - 1)
476 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len))
479 if (tr && (len < *size))
489 * proc_put_long - converts an integer to a decimal ASCII formatted string
491 * @buf: the user buffer
492 * @size: the size of the user buffer
493 * @val: the integer to be converted
494 * @neg: sign of the number, %TRUE for negative
496 * In case of success @buf and @size are updated with the amount of bytes
499 static void proc_put_long(void **buf, size_t *size, unsigned long val, bool neg)
502 char tmp[TMPBUFLEN], *p = tmp;
504 sprintf(p, "%s%lu", neg ? "-" : "", val);
508 memcpy(*buf, tmp, len);
514 static void proc_put_char(void **buf, size_t *size, char c)
517 char **buffer = (char **)buf;
526 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
528 int write, void *data)
532 if (*lvalp > (unsigned long) INT_MAX + 1)
536 if (*lvalp > (unsigned long) INT_MAX)
544 *lvalp = -(unsigned long)val;
547 *lvalp = (unsigned long)val;
553 static int do_proc_douintvec_conv(unsigned long *lvalp,
555 int write, void *data)
558 if (*lvalp > UINT_MAX)
562 unsigned int val = *valp;
563 *lvalp = (unsigned long)val;
568 static const char proc_wspace_sep[] = { ' ', '\t', '\n' };
570 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
571 int write, void *buffer,
572 size_t *lenp, loff_t *ppos,
573 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
574 int write, void *data),
577 int *i, vleft, first = 1, err = 0;
581 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {
586 i = (int *) tbl_data;
587 vleft = table->maxlen / sizeof(*i);
591 conv = do_proc_dointvec_conv;
594 if (proc_first_pos_non_zero_ignore(ppos, table))
597 if (left > PAGE_SIZE - 1)
598 left = PAGE_SIZE - 1;
602 for (; left && vleft--; i++, first=0) {
607 left -= proc_skip_spaces(&p);
611 err = proc_get_long(&p, &left, &lval, &neg,
613 sizeof(proc_wspace_sep), NULL);
616 if (conv(&neg, &lval, i, 1, data)) {
621 if (conv(&neg, &lval, i, 0, data)) {
626 proc_put_char(&buffer, &left, '\t');
627 proc_put_long(&buffer, &left, lval, neg);
631 if (!write && !first && left && !err)
632 proc_put_char(&buffer, &left, '\n');
633 if (write && !err && left)
634 left -= proc_skip_spaces(&p);
636 return err ? : -EINVAL;
643 static int do_proc_dointvec(struct ctl_table *table, int write,
644 void *buffer, size_t *lenp, loff_t *ppos,
645 int (*conv)(bool *negp, unsigned long *lvalp, int *valp,
646 int write, void *data),
649 return __do_proc_dointvec(table->data, table, write,
650 buffer, lenp, ppos, conv, data);
653 static int do_proc_douintvec_w(unsigned int *tbl_data,
654 struct ctl_table *table,
656 size_t *lenp, loff_t *ppos,
657 int (*conv)(unsigned long *lvalp,
659 int write, void *data),
670 if (proc_first_pos_non_zero_ignore(ppos, table))
673 if (left > PAGE_SIZE - 1)
674 left = PAGE_SIZE - 1;
676 left -= proc_skip_spaces(&p);
682 err = proc_get_long(&p, &left, &lval, &neg,
684 sizeof(proc_wspace_sep), NULL);
690 if (conv(&lval, tbl_data, 1, data)) {
696 left -= proc_skip_spaces(&p);
704 /* This is in keeping with old __do_proc_dointvec() */
710 static int do_proc_douintvec_r(unsigned int *tbl_data, void *buffer,
711 size_t *lenp, loff_t *ppos,
712 int (*conv)(unsigned long *lvalp,
714 int write, void *data),
723 if (conv(&lval, tbl_data, 0, data)) {
728 proc_put_long(&buffer, &left, lval, false);
732 proc_put_char(&buffer, &left, '\n');
741 static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table,
742 int write, void *buffer,
743 size_t *lenp, loff_t *ppos,
744 int (*conv)(unsigned long *lvalp,
746 int write, void *data),
749 unsigned int *i, vleft;
751 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) {
756 i = (unsigned int *) tbl_data;
757 vleft = table->maxlen / sizeof(*i);
760 * Arrays are not supported, keep this simple. *Do not* add
769 conv = do_proc_douintvec_conv;
772 return do_proc_douintvec_w(i, table, buffer, lenp, ppos,
774 return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data);
777 static int do_proc_douintvec(struct ctl_table *table, int write,
778 void *buffer, size_t *lenp, loff_t *ppos,
779 int (*conv)(unsigned long *lvalp,
781 int write, void *data),
784 return __do_proc_douintvec(table->data, table, write,
785 buffer, lenp, ppos, conv, data);
789 * proc_dointvec - read a vector of integers
790 * @table: the sysctl table
791 * @write: %TRUE if this is a write to the sysctl file
792 * @buffer: the user buffer
793 * @lenp: the size of the user buffer
794 * @ppos: file position
796 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
797 * values from/to the user buffer, treated as an ASCII string.
799 * Returns 0 on success.
801 int proc_dointvec(struct ctl_table *table, int write, void *buffer,
802 size_t *lenp, loff_t *ppos)
804 return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL);
807 #ifdef CONFIG_COMPACTION
808 static int proc_dointvec_minmax_warn_RT_change(struct ctl_table *table,
809 int write, void *buffer, size_t *lenp, loff_t *ppos)
813 if (!IS_ENABLED(CONFIG_PREEMPT_RT) || !write)
814 return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
816 old = *(int *)table->data;
817 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
820 if (old != *(int *)table->data)
821 pr_warn_once("sysctl attribute %s changed by %s[%d]\n",
822 table->procname, current->comm,
823 task_pid_nr(current));
829 * proc_douintvec - read a vector of unsigned integers
830 * @table: the sysctl table
831 * @write: %TRUE if this is a write to the sysctl file
832 * @buffer: the user buffer
833 * @lenp: the size of the user buffer
834 * @ppos: file position
836 * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer
837 * values from/to the user buffer, treated as an ASCII string.
839 * Returns 0 on success.
841 int proc_douintvec(struct ctl_table *table, int write, void *buffer,
842 size_t *lenp, loff_t *ppos)
844 return do_proc_douintvec(table, write, buffer, lenp, ppos,
845 do_proc_douintvec_conv, NULL);
849 * Taint values can only be increased
850 * This means we can safely use a temporary.
852 static int proc_taint(struct ctl_table *table, int write,
853 void *buffer, size_t *lenp, loff_t *ppos)
856 unsigned long tmptaint = get_taint();
859 if (write && !capable(CAP_SYS_ADMIN))
864 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos);
870 * Poor man's atomic or. Not worth adding a primitive
871 * to everyone's atomic.h for this
874 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
875 if ((tmptaint >> i) & 1)
876 add_taint(i, LOCKDEP_STILL_OK);
884 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
885 void *buffer, size_t *lenp, loff_t *ppos)
887 if (write && !capable(CAP_SYS_ADMIN))
890 return proc_dointvec_minmax(table, write, buffer, lenp, ppos);
895 * struct do_proc_dointvec_minmax_conv_param - proc_dointvec_minmax() range checking structure
896 * @min: pointer to minimum allowable value
897 * @max: pointer to maximum allowable value
899 * The do_proc_dointvec_minmax_conv_param structure provides the
900 * minimum and maximum values for doing range checking for those sysctl
901 * parameters that use the proc_dointvec_minmax() handler.
903 struct do_proc_dointvec_minmax_conv_param {
908 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp,
910 int write, void *data)
913 struct do_proc_dointvec_minmax_conv_param *param = data;
915 * If writing, first do so via a temporary local int so we can
916 * bounds-check it before touching *valp.
918 int *ip = write ? &tmp : valp;
920 ret = do_proc_dointvec_conv(negp, lvalp, ip, write, data);
925 if ((param->min && *param->min > tmp) ||
926 (param->max && *param->max < tmp))
935 * proc_dointvec_minmax - read a vector of integers with min/max values
936 * @table: the sysctl table
937 * @write: %TRUE if this is a write to the sysctl file
938 * @buffer: the user buffer
939 * @lenp: the size of the user buffer
940 * @ppos: file position
942 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
943 * values from/to the user buffer, treated as an ASCII string.
945 * This routine will ensure the values are within the range specified by
946 * table->extra1 (min) and table->extra2 (max).
948 * Returns 0 on success or -EINVAL on write when the range check fails.
950 int proc_dointvec_minmax(struct ctl_table *table, int write,
951 void *buffer, size_t *lenp, loff_t *ppos)
953 struct do_proc_dointvec_minmax_conv_param param = {
954 .min = (int *) table->extra1,
955 .max = (int *) table->extra2,
957 return do_proc_dointvec(table, write, buffer, lenp, ppos,
958 do_proc_dointvec_minmax_conv, ¶m);
962 * struct do_proc_douintvec_minmax_conv_param - proc_douintvec_minmax() range checking structure
963 * @min: pointer to minimum allowable value
964 * @max: pointer to maximum allowable value
966 * The do_proc_douintvec_minmax_conv_param structure provides the
967 * minimum and maximum values for doing range checking for those sysctl
968 * parameters that use the proc_douintvec_minmax() handler.
970 struct do_proc_douintvec_minmax_conv_param {
975 static int do_proc_douintvec_minmax_conv(unsigned long *lvalp,
977 int write, void *data)
981 struct do_proc_douintvec_minmax_conv_param *param = data;
982 /* write via temporary local uint for bounds-checking */
983 unsigned int *up = write ? &tmp : valp;
985 ret = do_proc_douintvec_conv(lvalp, up, write, data);
990 if ((param->min && *param->min > tmp) ||
991 (param->max && *param->max < tmp))
1001 * proc_douintvec_minmax - read a vector of unsigned ints with min/max values
1002 * @table: the sysctl table
1003 * @write: %TRUE if this is a write to the sysctl file
1004 * @buffer: the user buffer
1005 * @lenp: the size of the user buffer
1006 * @ppos: file position
1008 * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer
1009 * values from/to the user buffer, treated as an ASCII string. Negative
1010 * strings are not allowed.
1012 * This routine will ensure the values are within the range specified by
1013 * table->extra1 (min) and table->extra2 (max). There is a final sanity
1014 * check for UINT_MAX to avoid having to support wrap around uses from
1017 * Returns 0 on success or -ERANGE on write when the range check fails.
1019 int proc_douintvec_minmax(struct ctl_table *table, int write,
1020 void *buffer, size_t *lenp, loff_t *ppos)
1022 struct do_proc_douintvec_minmax_conv_param param = {
1023 .min = (unsigned int *) table->extra1,
1024 .max = (unsigned int *) table->extra2,
1026 return do_proc_douintvec(table, write, buffer, lenp, ppos,
1027 do_proc_douintvec_minmax_conv, ¶m);
1030 static int do_proc_dopipe_max_size_conv(unsigned long *lvalp,
1032 int write, void *data)
1037 val = round_pipe_size(*lvalp);
1043 unsigned int val = *valp;
1044 *lvalp = (unsigned long) val;
1050 static int proc_dopipe_max_size(struct ctl_table *table, int write,
1051 void *buffer, size_t *lenp, loff_t *ppos)
1053 return do_proc_douintvec(table, write, buffer, lenp, ppos,
1054 do_proc_dopipe_max_size_conv, NULL);
1057 static void validate_coredump_safety(void)
1059 #ifdef CONFIG_COREDUMP
1060 if (suid_dumpable == SUID_DUMP_ROOT &&
1061 core_pattern[0] != '/' && core_pattern[0] != '|') {
1063 "Unsafe core_pattern used with fs.suid_dumpable=2.\n"
1064 "Pipe handler or fully qualified core dump path required.\n"
1065 "Set kernel.core_pattern before fs.suid_dumpable.\n"
1071 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
1072 void *buffer, size_t *lenp, loff_t *ppos)
1074 int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
1076 validate_coredump_safety();
1080 #ifdef CONFIG_COREDUMP
1081 static int proc_dostring_coredump(struct ctl_table *table, int write,
1082 void *buffer, size_t *lenp, loff_t *ppos)
1084 int error = proc_dostring(table, write, buffer, lenp, ppos);
1086 validate_coredump_safety();
1091 #ifdef CONFIG_MAGIC_SYSRQ
1092 static int sysrq_sysctl_handler(struct ctl_table *table, int write,
1093 void *buffer, size_t *lenp, loff_t *ppos)
1099 ret = __do_proc_dointvec(&tmp, table, write, buffer,
1100 lenp, ppos, NULL, NULL);
1105 sysrq_toggle_support(tmp);
1111 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table,
1112 int write, void *buffer, size_t *lenp, loff_t *ppos,
1113 unsigned long convmul, unsigned long convdiv)
1115 unsigned long *i, *min, *max;
1116 int vleft, first = 1, err = 0;
1120 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) {
1125 i = (unsigned long *) data;
1126 min = (unsigned long *) table->extra1;
1127 max = (unsigned long *) table->extra2;
1128 vleft = table->maxlen / sizeof(unsigned long);
1132 if (proc_first_pos_non_zero_ignore(ppos, table))
1135 if (left > PAGE_SIZE - 1)
1136 left = PAGE_SIZE - 1;
1140 for (; left && vleft--; i++, first = 0) {
1146 left -= proc_skip_spaces(&p);
1150 err = proc_get_long(&p, &left, &val, &neg,
1152 sizeof(proc_wspace_sep), NULL);
1157 val = convmul * val / convdiv;
1158 if ((min && val < *min) || (max && val > *max)) {
1164 val = convdiv * (*i) / convmul;
1166 proc_put_char(&buffer, &left, '\t');
1167 proc_put_long(&buffer, &left, val, false);
1171 if (!write && !first && left && !err)
1172 proc_put_char(&buffer, &left, '\n');
1174 left -= proc_skip_spaces(&p);
1176 return err ? : -EINVAL;
1183 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,
1184 void *buffer, size_t *lenp, loff_t *ppos, unsigned long convmul,
1185 unsigned long convdiv)
1187 return __do_proc_doulongvec_minmax(table->data, table, write,
1188 buffer, lenp, ppos, convmul, convdiv);
1192 * proc_doulongvec_minmax - read a vector of long integers with min/max values
1193 * @table: the sysctl table
1194 * @write: %TRUE if this is a write to the sysctl file
1195 * @buffer: the user buffer
1196 * @lenp: the size of the user buffer
1197 * @ppos: file position
1199 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
1200 * values from/to the user buffer, treated as an ASCII string.
1202 * This routine will ensure the values are within the range specified by
1203 * table->extra1 (min) and table->extra2 (max).
1205 * Returns 0 on success.
1207 int proc_doulongvec_minmax(struct ctl_table *table, int write,
1208 void *buffer, size_t *lenp, loff_t *ppos)
1210 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l);
1214 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
1215 * @table: the sysctl table
1216 * @write: %TRUE if this is a write to the sysctl file
1217 * @buffer: the user buffer
1218 * @lenp: the size of the user buffer
1219 * @ppos: file position
1221 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
1222 * values from/to the user buffer, treated as an ASCII string. The values
1223 * are treated as milliseconds, and converted to jiffies when they are stored.
1225 * This routine will ensure the values are within the range specified by
1226 * table->extra1 (min) and table->extra2 (max).
1228 * Returns 0 on success.
1230 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
1231 void *buffer, size_t *lenp, loff_t *ppos)
1233 return do_proc_doulongvec_minmax(table, write, buffer,
1234 lenp, ppos, HZ, 1000l);
1238 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp,
1240 int write, void *data)
1243 if (*lvalp > INT_MAX / HZ)
1245 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
1251 lval = -(unsigned long)val;
1254 lval = (unsigned long)val;
1261 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp,
1263 int write, void *data)
1266 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
1268 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
1274 lval = -(unsigned long)val;
1277 lval = (unsigned long)val;
1279 *lvalp = jiffies_to_clock_t(lval);
1284 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp,
1286 int write, void *data)
1289 unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
1299 lval = -(unsigned long)val;
1302 lval = (unsigned long)val;
1304 *lvalp = jiffies_to_msecs(lval);
1310 * proc_dointvec_jiffies - read a vector of integers as seconds
1311 * @table: the sysctl table
1312 * @write: %TRUE if this is a write to the sysctl file
1313 * @buffer: the user buffer
1314 * @lenp: the size of the user buffer
1315 * @ppos: file position
1317 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
1318 * values from/to the user buffer, treated as an ASCII string.
1319 * The values read are assumed to be in seconds, and are converted into
1322 * Returns 0 on success.
1324 int proc_dointvec_jiffies(struct ctl_table *table, int write,
1325 void *buffer, size_t *lenp, loff_t *ppos)
1327 return do_proc_dointvec(table,write,buffer,lenp,ppos,
1328 do_proc_dointvec_jiffies_conv,NULL);
1332 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
1333 * @table: the sysctl table
1334 * @write: %TRUE if this is a write to the sysctl file
1335 * @buffer: the user buffer
1336 * @lenp: the size of the user buffer
1337 * @ppos: pointer to the file position
1339 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
1340 * values from/to the user buffer, treated as an ASCII string.
1341 * The values read are assumed to be in 1/USER_HZ seconds, and
1342 * are converted into jiffies.
1344 * Returns 0 on success.
1346 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
1347 void *buffer, size_t *lenp, loff_t *ppos)
1349 return do_proc_dointvec(table,write,buffer,lenp,ppos,
1350 do_proc_dointvec_userhz_jiffies_conv,NULL);
1354 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
1355 * @table: the sysctl table
1356 * @write: %TRUE if this is a write to the sysctl file
1357 * @buffer: the user buffer
1358 * @lenp: the size of the user buffer
1359 * @ppos: file position
1360 * @ppos: the current position in the file
1362 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
1363 * values from/to the user buffer, treated as an ASCII string.
1364 * The values read are assumed to be in 1/1000 seconds, and
1365 * are converted into jiffies.
1367 * Returns 0 on success.
1369 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, void *buffer,
1370 size_t *lenp, loff_t *ppos)
1372 return do_proc_dointvec(table, write, buffer, lenp, ppos,
1373 do_proc_dointvec_ms_jiffies_conv, NULL);
1376 static int proc_do_cad_pid(struct ctl_table *table, int write, void *buffer,
1377 size_t *lenp, loff_t *ppos)
1379 struct pid *new_pid;
1383 tmp = pid_vnr(cad_pid);
1385 r = __do_proc_dointvec(&tmp, table, write, buffer,
1386 lenp, ppos, NULL, NULL);
1390 new_pid = find_get_pid(tmp);
1394 put_pid(xchg(&cad_pid, new_pid));
1399 * proc_do_large_bitmap - read/write from/to a large bitmap
1400 * @table: the sysctl table
1401 * @write: %TRUE if this is a write to the sysctl file
1402 * @buffer: the user buffer
1403 * @lenp: the size of the user buffer
1404 * @ppos: file position
1406 * The bitmap is stored at table->data and the bitmap length (in bits)
1409 * We use a range comma separated format (e.g. 1,3-4,10-10) so that
1410 * large bitmaps may be represented in a compact manner. Writing into
1411 * the file will clear the bitmap then update it with the given input.
1413 * Returns 0 on success.
1415 int proc_do_large_bitmap(struct ctl_table *table, int write,
1416 void *buffer, size_t *lenp, loff_t *ppos)
1420 size_t left = *lenp;
1421 unsigned long bitmap_len = table->maxlen;
1422 unsigned long *bitmap = *(unsigned long **) table->data;
1423 unsigned long *tmp_bitmap = NULL;
1424 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c;
1426 if (!bitmap || !bitmap_len || !left || (*ppos && !write)) {
1435 if (left > PAGE_SIZE - 1) {
1436 left = PAGE_SIZE - 1;
1437 /* How much of the buffer we'll skip this pass */
1438 skipped = *lenp - left;
1441 tmp_bitmap = bitmap_zalloc(bitmap_len, GFP_KERNEL);
1444 proc_skip_char(&p, &left, '\n');
1445 while (!err && left) {
1446 unsigned long val_a, val_b;
1450 /* In case we stop parsing mid-number, we can reset */
1452 err = proc_get_long(&p, &left, &val_a, &neg, tr_a,
1455 * If we consumed the entirety of a truncated buffer or
1456 * only one char is left (may be a "-"), then stop here,
1457 * reset, & come back for more.
1459 if ((left <= 1) && skipped) {
1466 if (val_a >= bitmap_len || neg) {
1478 err = proc_get_long(&p, &left, &val_b,
1479 &neg, tr_b, sizeof(tr_b),
1482 * If we consumed all of a truncated buffer or
1483 * then stop here, reset, & come back for more.
1485 if (!left && skipped) {
1492 if (val_b >= bitmap_len || neg ||
1503 bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
1505 proc_skip_char(&p, &left, '\n');
1509 unsigned long bit_a, bit_b = 0;
1512 bit_a = find_next_bit(bitmap, bitmap_len, bit_b);
1513 if (bit_a >= bitmap_len)
1515 bit_b = find_next_zero_bit(bitmap, bitmap_len,
1519 proc_put_char(&buffer, &left, ',');
1520 proc_put_long(&buffer, &left, bit_a, false);
1521 if (bit_a != bit_b) {
1522 proc_put_char(&buffer, &left, '-');
1523 proc_put_long(&buffer, &left, bit_b, false);
1528 proc_put_char(&buffer, &left, '\n');
1534 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
1536 bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
1542 bitmap_free(tmp_bitmap);
1546 #else /* CONFIG_PROC_SYSCTL */
1548 int proc_dostring(struct ctl_table *table, int write,
1549 void *buffer, size_t *lenp, loff_t *ppos)
1554 int proc_dointvec(struct ctl_table *table, int write,
1555 void *buffer, size_t *lenp, loff_t *ppos)
1560 int proc_douintvec(struct ctl_table *table, int write,
1561 void *buffer, size_t *lenp, loff_t *ppos)
1566 int proc_dointvec_minmax(struct ctl_table *table, int write,
1567 void *buffer, size_t *lenp, loff_t *ppos)
1572 int proc_douintvec_minmax(struct ctl_table *table, int write,
1573 void *buffer, size_t *lenp, loff_t *ppos)
1578 int proc_dointvec_jiffies(struct ctl_table *table, int write,
1579 void *buffer, size_t *lenp, loff_t *ppos)
1584 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
1585 void *buffer, size_t *lenp, loff_t *ppos)
1590 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
1591 void *buffer, size_t *lenp, loff_t *ppos)
1596 int proc_doulongvec_minmax(struct ctl_table *table, int write,
1597 void *buffer, size_t *lenp, loff_t *ppos)
1602 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
1603 void *buffer, size_t *lenp, loff_t *ppos)
1608 int proc_do_large_bitmap(struct ctl_table *table, int write,
1609 void *buffer, size_t *lenp, loff_t *ppos)
1614 #endif /* CONFIG_PROC_SYSCTL */
1616 #if defined(CONFIG_SYSCTL)
1617 int proc_do_static_key(struct ctl_table *table, int write,
1618 void *buffer, size_t *lenp, loff_t *ppos)
1620 struct static_key *key = (struct static_key *)table->data;
1621 static DEFINE_MUTEX(static_key_mutex);
1623 struct ctl_table tmp = {
1625 .maxlen = sizeof(val),
1626 .mode = table->mode,
1627 .extra1 = SYSCTL_ZERO,
1628 .extra2 = SYSCTL_ONE,
1631 if (write && !capable(CAP_SYS_ADMIN))
1634 mutex_lock(&static_key_mutex);
1635 val = static_key_enabled(key);
1636 ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
1637 if (write && !ret) {
1639 static_key_enable(key);
1641 static_key_disable(key);
1643 mutex_unlock(&static_key_mutex);
1647 static struct ctl_table kern_table[] = {
1649 .procname = "sched_child_runs_first",
1650 .data = &sysctl_sched_child_runs_first,
1651 .maxlen = sizeof(unsigned int),
1653 .proc_handler = proc_dointvec,
1655 #ifdef CONFIG_SCHED_DEBUG
1657 .procname = "sched_min_granularity_ns",
1658 .data = &sysctl_sched_min_granularity,
1659 .maxlen = sizeof(unsigned int),
1661 .proc_handler = sched_proc_update_handler,
1662 .extra1 = &min_sched_granularity_ns,
1663 .extra2 = &max_sched_granularity_ns,
1666 .procname = "sched_latency_ns",
1667 .data = &sysctl_sched_latency,
1668 .maxlen = sizeof(unsigned int),
1670 .proc_handler = sched_proc_update_handler,
1671 .extra1 = &min_sched_granularity_ns,
1672 .extra2 = &max_sched_granularity_ns,
1675 .procname = "sched_wakeup_granularity_ns",
1676 .data = &sysctl_sched_wakeup_granularity,
1677 .maxlen = sizeof(unsigned int),
1679 .proc_handler = sched_proc_update_handler,
1680 .extra1 = &min_wakeup_granularity_ns,
1681 .extra2 = &max_wakeup_granularity_ns,
1685 .procname = "sched_tunable_scaling",
1686 .data = &sysctl_sched_tunable_scaling,
1687 .maxlen = sizeof(enum sched_tunable_scaling),
1689 .proc_handler = sched_proc_update_handler,
1690 .extra1 = &min_sched_tunable_scaling,
1691 .extra2 = &max_sched_tunable_scaling,
1694 .procname = "sched_migration_cost_ns",
1695 .data = &sysctl_sched_migration_cost,
1696 .maxlen = sizeof(unsigned int),
1698 .proc_handler = proc_dointvec,
1701 .procname = "sched_nr_migrate",
1702 .data = &sysctl_sched_nr_migrate,
1703 .maxlen = sizeof(unsigned int),
1705 .proc_handler = proc_dointvec,
1707 #ifdef CONFIG_SCHEDSTATS
1709 .procname = "sched_schedstats",
1711 .maxlen = sizeof(unsigned int),
1713 .proc_handler = sysctl_schedstats,
1714 .extra1 = SYSCTL_ZERO,
1715 .extra2 = SYSCTL_ONE,
1717 #endif /* CONFIG_SCHEDSTATS */
1718 #endif /* CONFIG_SMP */
1719 #ifdef CONFIG_NUMA_BALANCING
1721 .procname = "numa_balancing_scan_delay_ms",
1722 .data = &sysctl_numa_balancing_scan_delay,
1723 .maxlen = sizeof(unsigned int),
1725 .proc_handler = proc_dointvec,
1728 .procname = "numa_balancing_scan_period_min_ms",
1729 .data = &sysctl_numa_balancing_scan_period_min,
1730 .maxlen = sizeof(unsigned int),
1732 .proc_handler = proc_dointvec,
1735 .procname = "numa_balancing_scan_period_max_ms",
1736 .data = &sysctl_numa_balancing_scan_period_max,
1737 .maxlen = sizeof(unsigned int),
1739 .proc_handler = proc_dointvec,
1742 .procname = "numa_balancing_scan_size_mb",
1743 .data = &sysctl_numa_balancing_scan_size,
1744 .maxlen = sizeof(unsigned int),
1746 .proc_handler = proc_dointvec_minmax,
1747 .extra1 = SYSCTL_ONE,
1750 .procname = "numa_balancing",
1751 .data = NULL, /* filled in by handler */
1752 .maxlen = sizeof(unsigned int),
1754 .proc_handler = sysctl_numa_balancing,
1755 .extra1 = SYSCTL_ZERO,
1756 .extra2 = SYSCTL_ONE,
1758 #endif /* CONFIG_NUMA_BALANCING */
1759 #endif /* CONFIG_SCHED_DEBUG */
1761 .procname = "sched_rt_period_us",
1762 .data = &sysctl_sched_rt_period,
1763 .maxlen = sizeof(unsigned int),
1765 .proc_handler = sched_rt_handler,
1768 .procname = "sched_rt_runtime_us",
1769 .data = &sysctl_sched_rt_runtime,
1770 .maxlen = sizeof(int),
1772 .proc_handler = sched_rt_handler,
1775 .procname = "sched_rr_timeslice_ms",
1776 .data = &sysctl_sched_rr_timeslice,
1777 .maxlen = sizeof(int),
1779 .proc_handler = sched_rr_handler,
1781 #ifdef CONFIG_UCLAMP_TASK
1783 .procname = "sched_util_clamp_min",
1784 .data = &sysctl_sched_uclamp_util_min,
1785 .maxlen = sizeof(unsigned int),
1787 .proc_handler = sysctl_sched_uclamp_handler,
1790 .procname = "sched_util_clamp_max",
1791 .data = &sysctl_sched_uclamp_util_max,
1792 .maxlen = sizeof(unsigned int),
1794 .proc_handler = sysctl_sched_uclamp_handler,
1797 #ifdef CONFIG_SCHED_AUTOGROUP
1799 .procname = "sched_autogroup_enabled",
1800 .data = &sysctl_sched_autogroup_enabled,
1801 .maxlen = sizeof(unsigned int),
1803 .proc_handler = proc_dointvec_minmax,
1804 .extra1 = SYSCTL_ZERO,
1805 .extra2 = SYSCTL_ONE,
1808 #ifdef CONFIG_CFS_BANDWIDTH
1810 .procname = "sched_cfs_bandwidth_slice_us",
1811 .data = &sysctl_sched_cfs_bandwidth_slice,
1812 .maxlen = sizeof(unsigned int),
1814 .proc_handler = proc_dointvec_minmax,
1815 .extra1 = SYSCTL_ONE,
1818 #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
1820 .procname = "sched_energy_aware",
1821 .data = &sysctl_sched_energy_aware,
1822 .maxlen = sizeof(unsigned int),
1824 .proc_handler = sched_energy_aware_handler,
1825 .extra1 = SYSCTL_ZERO,
1826 .extra2 = SYSCTL_ONE,
1829 #ifdef CONFIG_PROVE_LOCKING
1831 .procname = "prove_locking",
1832 .data = &prove_locking,
1833 .maxlen = sizeof(int),
1835 .proc_handler = proc_dointvec,
1838 #ifdef CONFIG_LOCK_STAT
1840 .procname = "lock_stat",
1842 .maxlen = sizeof(int),
1844 .proc_handler = proc_dointvec,
1848 .procname = "panic",
1849 .data = &panic_timeout,
1850 .maxlen = sizeof(int),
1852 .proc_handler = proc_dointvec,
1854 #ifdef CONFIG_COREDUMP
1856 .procname = "core_uses_pid",
1857 .data = &core_uses_pid,
1858 .maxlen = sizeof(int),
1860 .proc_handler = proc_dointvec,
1863 .procname = "core_pattern",
1864 .data = core_pattern,
1865 .maxlen = CORENAME_MAX_SIZE,
1867 .proc_handler = proc_dostring_coredump,
1870 .procname = "core_pipe_limit",
1871 .data = &core_pipe_limit,
1872 .maxlen = sizeof(unsigned int),
1874 .proc_handler = proc_dointvec,
1877 #ifdef CONFIG_PROC_SYSCTL
1879 .procname = "tainted",
1880 .maxlen = sizeof(long),
1882 .proc_handler = proc_taint,
1885 .procname = "sysctl_writes_strict",
1886 .data = &sysctl_writes_strict,
1887 .maxlen = sizeof(int),
1889 .proc_handler = proc_dointvec_minmax,
1891 .extra2 = SYSCTL_ONE,
1894 #ifdef CONFIG_LATENCYTOP
1896 .procname = "latencytop",
1897 .data = &latencytop_enabled,
1898 .maxlen = sizeof(int),
1900 .proc_handler = sysctl_latencytop,
1903 #ifdef CONFIG_BLK_DEV_INITRD
1905 .procname = "real-root-dev",
1906 .data = &real_root_dev,
1907 .maxlen = sizeof(int),
1909 .proc_handler = proc_dointvec,
1913 .procname = "print-fatal-signals",
1914 .data = &print_fatal_signals,
1915 .maxlen = sizeof(int),
1917 .proc_handler = proc_dointvec,
1921 .procname = "reboot-cmd",
1922 .data = reboot_command,
1925 .proc_handler = proc_dostring,
1928 .procname = "stop-a",
1929 .data = &stop_a_enabled,
1930 .maxlen = sizeof (int),
1932 .proc_handler = proc_dointvec,
1935 .procname = "scons-poweroff",
1936 .data = &scons_pwroff,
1937 .maxlen = sizeof (int),
1939 .proc_handler = proc_dointvec,
1942 #ifdef CONFIG_SPARC64
1944 .procname = "tsb-ratio",
1945 .data = &sysctl_tsb_ratio,
1946 .maxlen = sizeof (int),
1948 .proc_handler = proc_dointvec,
1951 #ifdef CONFIG_PARISC
1953 .procname = "soft-power",
1954 .data = &pwrsw_enabled,
1955 .maxlen = sizeof (int),
1957 .proc_handler = proc_dointvec,
1960 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
1962 .procname = "unaligned-trap",
1963 .data = &unaligned_enabled,
1964 .maxlen = sizeof (int),
1966 .proc_handler = proc_dointvec,
1970 .procname = "ctrl-alt-del",
1972 .maxlen = sizeof(int),
1974 .proc_handler = proc_dointvec,
1976 #ifdef CONFIG_FUNCTION_TRACER
1978 .procname = "ftrace_enabled",
1979 .data = &ftrace_enabled,
1980 .maxlen = sizeof(int),
1982 .proc_handler = ftrace_enable_sysctl,
1985 #ifdef CONFIG_STACK_TRACER
1987 .procname = "stack_tracer_enabled",
1988 .data = &stack_tracer_enabled,
1989 .maxlen = sizeof(int),
1991 .proc_handler = stack_trace_sysctl,
1994 #ifdef CONFIG_TRACING
1996 .procname = "ftrace_dump_on_oops",
1997 .data = &ftrace_dump_on_oops,
1998 .maxlen = sizeof(int),
2000 .proc_handler = proc_dointvec,
2003 .procname = "traceoff_on_warning",
2004 .data = &__disable_trace_on_warning,
2005 .maxlen = sizeof(__disable_trace_on_warning),
2007 .proc_handler = proc_dointvec,
2010 .procname = "tracepoint_printk",
2011 .data = &tracepoint_printk,
2012 .maxlen = sizeof(tracepoint_printk),
2014 .proc_handler = tracepoint_printk_sysctl,
2017 #ifdef CONFIG_KEXEC_CORE
2019 .procname = "kexec_load_disabled",
2020 .data = &kexec_load_disabled,
2021 .maxlen = sizeof(int),
2023 /* only handle a transition from default "0" to "1" */
2024 .proc_handler = proc_dointvec_minmax,
2025 .extra1 = SYSCTL_ONE,
2026 .extra2 = SYSCTL_ONE,
2029 #ifdef CONFIG_MODULES
2031 .procname = "modprobe",
2032 .data = &modprobe_path,
2033 .maxlen = KMOD_PATH_LEN,
2035 .proc_handler = proc_dostring,
2038 .procname = "modules_disabled",
2039 .data = &modules_disabled,
2040 .maxlen = sizeof(int),
2042 /* only handle a transition from default "0" to "1" */
2043 .proc_handler = proc_dointvec_minmax,
2044 .extra1 = SYSCTL_ONE,
2045 .extra2 = SYSCTL_ONE,
2048 #ifdef CONFIG_UEVENT_HELPER
2050 .procname = "hotplug",
2051 .data = &uevent_helper,
2052 .maxlen = UEVENT_HELPER_PATH_LEN,
2054 .proc_handler = proc_dostring,
2057 #ifdef CONFIG_CHR_DEV_SG
2059 .procname = "sg-big-buff",
2060 .data = &sg_big_buff,
2061 .maxlen = sizeof (int),
2063 .proc_handler = proc_dointvec,
2066 #ifdef CONFIG_BSD_PROCESS_ACCT
2070 .maxlen = 3*sizeof(int),
2072 .proc_handler = proc_dointvec,
2075 #ifdef CONFIG_MAGIC_SYSRQ
2077 .procname = "sysrq",
2079 .maxlen = sizeof (int),
2081 .proc_handler = sysrq_sysctl_handler,
2084 #ifdef CONFIG_PROC_SYSCTL
2086 .procname = "cad_pid",
2088 .maxlen = sizeof (int),
2090 .proc_handler = proc_do_cad_pid,
2094 .procname = "threads-max",
2096 .maxlen = sizeof(int),
2098 .proc_handler = sysctl_max_threads,
2101 .procname = "random",
2103 .child = random_table,
2106 .procname = "usermodehelper",
2108 .child = usermodehelper_table,
2110 #ifdef CONFIG_FW_LOADER_USER_HELPER
2112 .procname = "firmware_config",
2114 .child = firmware_config_table,
2118 .procname = "overflowuid",
2119 .data = &overflowuid,
2120 .maxlen = sizeof(int),
2122 .proc_handler = proc_dointvec_minmax,
2123 .extra1 = &minolduid,
2124 .extra2 = &maxolduid,
2127 .procname = "overflowgid",
2128 .data = &overflowgid,
2129 .maxlen = sizeof(int),
2131 .proc_handler = proc_dointvec_minmax,
2132 .extra1 = &minolduid,
2133 .extra2 = &maxolduid,
2137 .procname = "userprocess_debug",
2138 .data = &show_unhandled_signals,
2139 .maxlen = sizeof(int),
2141 .proc_handler = proc_dointvec,
2145 .procname = "pid_max",
2147 .maxlen = sizeof (int),
2149 .proc_handler = proc_dointvec_minmax,
2150 .extra1 = &pid_max_min,
2151 .extra2 = &pid_max_max,
2154 .procname = "panic_on_oops",
2155 .data = &panic_on_oops,
2156 .maxlen = sizeof(int),
2158 .proc_handler = proc_dointvec,
2161 .procname = "panic_print",
2162 .data = &panic_print,
2163 .maxlen = sizeof(unsigned long),
2165 .proc_handler = proc_doulongvec_minmax,
2167 #if defined CONFIG_PRINTK
2169 .procname = "printk",
2170 .data = &console_loglevel,
2171 .maxlen = 4*sizeof(int),
2173 .proc_handler = proc_dointvec,
2176 .procname = "printk_ratelimit",
2177 .data = &printk_ratelimit_state.interval,
2178 .maxlen = sizeof(int),
2180 .proc_handler = proc_dointvec_jiffies,
2183 .procname = "printk_ratelimit_burst",
2184 .data = &printk_ratelimit_state.burst,
2185 .maxlen = sizeof(int),
2187 .proc_handler = proc_dointvec,
2190 .procname = "printk_delay",
2191 .data = &printk_delay_msec,
2192 .maxlen = sizeof(int),
2194 .proc_handler = proc_dointvec_minmax,
2195 .extra1 = SYSCTL_ZERO,
2196 .extra2 = &ten_thousand,
2199 .procname = "printk_devkmsg",
2200 .data = devkmsg_log_str,
2201 .maxlen = DEVKMSG_STR_MAX_SIZE,
2203 .proc_handler = devkmsg_sysctl_set_loglvl,
2206 .procname = "dmesg_restrict",
2207 .data = &dmesg_restrict,
2208 .maxlen = sizeof(int),
2210 .proc_handler = proc_dointvec_minmax_sysadmin,
2211 .extra1 = SYSCTL_ZERO,
2212 .extra2 = SYSCTL_ONE,
2215 .procname = "kptr_restrict",
2216 .data = &kptr_restrict,
2217 .maxlen = sizeof(int),
2219 .proc_handler = proc_dointvec_minmax_sysadmin,
2220 .extra1 = SYSCTL_ZERO,
2225 .procname = "ngroups_max",
2226 .data = &ngroups_max,
2227 .maxlen = sizeof (int),
2229 .proc_handler = proc_dointvec,
2232 .procname = "cap_last_cap",
2233 .data = (void *)&cap_last_cap,
2234 .maxlen = sizeof(int),
2236 .proc_handler = proc_dointvec,
2238 #if defined(CONFIG_LOCKUP_DETECTOR)
2240 .procname = "watchdog",
2241 .data = &watchdog_user_enabled,
2242 .maxlen = sizeof(int),
2244 .proc_handler = proc_watchdog,
2245 .extra1 = SYSCTL_ZERO,
2246 .extra2 = SYSCTL_ONE,
2249 .procname = "watchdog_thresh",
2250 .data = &watchdog_thresh,
2251 .maxlen = sizeof(int),
2253 .proc_handler = proc_watchdog_thresh,
2254 .extra1 = SYSCTL_ZERO,
2258 .procname = "nmi_watchdog",
2259 .data = &nmi_watchdog_user_enabled,
2260 .maxlen = sizeof(int),
2261 .mode = NMI_WATCHDOG_SYSCTL_PERM,
2262 .proc_handler = proc_nmi_watchdog,
2263 .extra1 = SYSCTL_ZERO,
2264 .extra2 = SYSCTL_ONE,
2267 .procname = "watchdog_cpumask",
2268 .data = &watchdog_cpumask_bits,
2271 .proc_handler = proc_watchdog_cpumask,
2273 #ifdef CONFIG_SOFTLOCKUP_DETECTOR
2275 .procname = "soft_watchdog",
2276 .data = &soft_watchdog_user_enabled,
2277 .maxlen = sizeof(int),
2279 .proc_handler = proc_soft_watchdog,
2280 .extra1 = SYSCTL_ZERO,
2281 .extra2 = SYSCTL_ONE,
2284 .procname = "softlockup_panic",
2285 .data = &softlockup_panic,
2286 .maxlen = sizeof(int),
2288 .proc_handler = proc_dointvec_minmax,
2289 .extra1 = SYSCTL_ZERO,
2290 .extra2 = SYSCTL_ONE,
2294 .procname = "softlockup_all_cpu_backtrace",
2295 .data = &sysctl_softlockup_all_cpu_backtrace,
2296 .maxlen = sizeof(int),
2298 .proc_handler = proc_dointvec_minmax,
2299 .extra1 = SYSCTL_ZERO,
2300 .extra2 = SYSCTL_ONE,
2302 #endif /* CONFIG_SMP */
2304 #ifdef CONFIG_HARDLOCKUP_DETECTOR
2306 .procname = "hardlockup_panic",
2307 .data = &hardlockup_panic,
2308 .maxlen = sizeof(int),
2310 .proc_handler = proc_dointvec_minmax,
2311 .extra1 = SYSCTL_ZERO,
2312 .extra2 = SYSCTL_ONE,
2316 .procname = "hardlockup_all_cpu_backtrace",
2317 .data = &sysctl_hardlockup_all_cpu_backtrace,
2318 .maxlen = sizeof(int),
2320 .proc_handler = proc_dointvec_minmax,
2321 .extra1 = SYSCTL_ZERO,
2322 .extra2 = SYSCTL_ONE,
2324 #endif /* CONFIG_SMP */
2328 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
2330 .procname = "unknown_nmi_panic",
2331 .data = &unknown_nmi_panic,
2332 .maxlen = sizeof (int),
2334 .proc_handler = proc_dointvec,
2338 #if (defined(CONFIG_X86_32) || defined(CONFIG_PARISC)) && \
2339 defined(CONFIG_DEBUG_STACKOVERFLOW)
2341 .procname = "panic_on_stackoverflow",
2342 .data = &sysctl_panic_on_stackoverflow,
2343 .maxlen = sizeof(int),
2345 .proc_handler = proc_dointvec,
2348 #if defined(CONFIG_X86)
2350 .procname = "panic_on_unrecovered_nmi",
2351 .data = &panic_on_unrecovered_nmi,
2352 .maxlen = sizeof(int),
2354 .proc_handler = proc_dointvec,
2357 .procname = "panic_on_io_nmi",
2358 .data = &panic_on_io_nmi,
2359 .maxlen = sizeof(int),
2361 .proc_handler = proc_dointvec,
2364 .procname = "bootloader_type",
2365 .data = &bootloader_type,
2366 .maxlen = sizeof (int),
2368 .proc_handler = proc_dointvec,
2371 .procname = "bootloader_version",
2372 .data = &bootloader_version,
2373 .maxlen = sizeof (int),
2375 .proc_handler = proc_dointvec,
2378 .procname = "io_delay_type",
2379 .data = &io_delay_type,
2380 .maxlen = sizeof(int),
2382 .proc_handler = proc_dointvec,
2385 #if defined(CONFIG_MMU)
2387 .procname = "randomize_va_space",
2388 .data = &randomize_va_space,
2389 .maxlen = sizeof(int),
2391 .proc_handler = proc_dointvec,
2394 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
2396 .procname = "spin_retry",
2397 .data = &spin_retry,
2398 .maxlen = sizeof (int),
2400 .proc_handler = proc_dointvec,
2403 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
2405 .procname = "acpi_video_flags",
2406 .data = &acpi_realmode_flags,
2407 .maxlen = sizeof (unsigned long),
2409 .proc_handler = proc_doulongvec_minmax,
2412 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
2414 .procname = "ignore-unaligned-usertrap",
2415 .data = &no_unaligned_warning,
2416 .maxlen = sizeof (int),
2418 .proc_handler = proc_dointvec,
2423 .procname = "unaligned-dump-stack",
2424 .data = &unaligned_dump_stack,
2425 .maxlen = sizeof (int),
2427 .proc_handler = proc_dointvec,
2430 #ifdef CONFIG_DETECT_HUNG_TASK
2432 .procname = "hung_task_panic",
2433 .data = &sysctl_hung_task_panic,
2434 .maxlen = sizeof(int),
2436 .proc_handler = proc_dointvec_minmax,
2437 .extra1 = SYSCTL_ZERO,
2438 .extra2 = SYSCTL_ONE,
2441 .procname = "hung_task_check_count",
2442 .data = &sysctl_hung_task_check_count,
2443 .maxlen = sizeof(int),
2445 .proc_handler = proc_dointvec_minmax,
2446 .extra1 = SYSCTL_ZERO,
2449 .procname = "hung_task_timeout_secs",
2450 .data = &sysctl_hung_task_timeout_secs,
2451 .maxlen = sizeof(unsigned long),
2453 .proc_handler = proc_dohung_task_timeout_secs,
2454 .extra2 = &hung_task_timeout_max,
2457 .procname = "hung_task_check_interval_secs",
2458 .data = &sysctl_hung_task_check_interval_secs,
2459 .maxlen = sizeof(unsigned long),
2461 .proc_handler = proc_dohung_task_timeout_secs,
2462 .extra2 = &hung_task_timeout_max,
2465 .procname = "hung_task_warnings",
2466 .data = &sysctl_hung_task_warnings,
2467 .maxlen = sizeof(int),
2469 .proc_handler = proc_dointvec_minmax,
2473 #ifdef CONFIG_RT_MUTEXES
2475 .procname = "max_lock_depth",
2476 .data = &max_lock_depth,
2477 .maxlen = sizeof(int),
2479 .proc_handler = proc_dointvec,
2483 .procname = "poweroff_cmd",
2484 .data = &poweroff_cmd,
2485 .maxlen = POWEROFF_CMD_PATH_LEN,
2487 .proc_handler = proc_dostring,
2493 .child = key_sysctls,
2496 #ifdef CONFIG_PERF_EVENTS
2498 * User-space scripts rely on the existence of this file
2499 * as a feature check for perf_events being enabled.
2501 * So it's an ABI, do not remove!
2504 .procname = "perf_event_paranoid",
2505 .data = &sysctl_perf_event_paranoid,
2506 .maxlen = sizeof(sysctl_perf_event_paranoid),
2508 .proc_handler = proc_dointvec,
2511 .procname = "perf_event_mlock_kb",
2512 .data = &sysctl_perf_event_mlock,
2513 .maxlen = sizeof(sysctl_perf_event_mlock),
2515 .proc_handler = proc_dointvec,
2518 .procname = "perf_event_max_sample_rate",
2519 .data = &sysctl_perf_event_sample_rate,
2520 .maxlen = sizeof(sysctl_perf_event_sample_rate),
2522 .proc_handler = perf_proc_update_handler,
2523 .extra1 = SYSCTL_ONE,
2526 .procname = "perf_cpu_time_max_percent",
2527 .data = &sysctl_perf_cpu_time_max_percent,
2528 .maxlen = sizeof(sysctl_perf_cpu_time_max_percent),
2530 .proc_handler = perf_cpu_time_max_percent_handler,
2531 .extra1 = SYSCTL_ZERO,
2532 .extra2 = &one_hundred,
2535 .procname = "perf_event_max_stack",
2536 .data = &sysctl_perf_event_max_stack,
2537 .maxlen = sizeof(sysctl_perf_event_max_stack),
2539 .proc_handler = perf_event_max_stack_handler,
2540 .extra1 = SYSCTL_ZERO,
2541 .extra2 = &six_hundred_forty_kb,
2544 .procname = "perf_event_max_contexts_per_stack",
2545 .data = &sysctl_perf_event_max_contexts_per_stack,
2546 .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack),
2548 .proc_handler = perf_event_max_stack_handler,
2549 .extra1 = SYSCTL_ZERO,
2550 .extra2 = &one_thousand,
2554 .procname = "panic_on_warn",
2555 .data = &panic_on_warn,
2556 .maxlen = sizeof(int),
2558 .proc_handler = proc_dointvec_minmax,
2559 .extra1 = SYSCTL_ZERO,
2560 .extra2 = SYSCTL_ONE,
2562 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
2564 .procname = "timer_migration",
2565 .data = &sysctl_timer_migration,
2566 .maxlen = sizeof(unsigned int),
2568 .proc_handler = timer_migration_handler,
2569 .extra1 = SYSCTL_ZERO,
2570 .extra2 = SYSCTL_ONE,
2573 #ifdef CONFIG_BPF_SYSCALL
2575 .procname = "unprivileged_bpf_disabled",
2576 .data = &sysctl_unprivileged_bpf_disabled,
2577 .maxlen = sizeof(sysctl_unprivileged_bpf_disabled),
2579 /* only handle a transition from default "0" to "1" */
2580 .proc_handler = proc_dointvec_minmax,
2581 .extra1 = SYSCTL_ONE,
2582 .extra2 = SYSCTL_ONE,
2585 .procname = "bpf_stats_enabled",
2586 .data = &bpf_stats_enabled_key.key,
2587 .maxlen = sizeof(bpf_stats_enabled_key),
2589 .proc_handler = bpf_stats_handler,
2592 #if defined(CONFIG_TREE_RCU)
2594 .procname = "panic_on_rcu_stall",
2595 .data = &sysctl_panic_on_rcu_stall,
2596 .maxlen = sizeof(sysctl_panic_on_rcu_stall),
2598 .proc_handler = proc_dointvec_minmax,
2599 .extra1 = SYSCTL_ZERO,
2600 .extra2 = SYSCTL_ONE,
2603 #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
2605 .procname = "stack_erasing",
2607 .maxlen = sizeof(int),
2609 .proc_handler = stack_erasing_sysctl,
2610 .extra1 = SYSCTL_ZERO,
2611 .extra2 = SYSCTL_ONE,
2617 static struct ctl_table vm_table[] = {
2619 .procname = "overcommit_memory",
2620 .data = &sysctl_overcommit_memory,
2621 .maxlen = sizeof(sysctl_overcommit_memory),
2623 .proc_handler = proc_dointvec_minmax,
2624 .extra1 = SYSCTL_ZERO,
2628 .procname = "panic_on_oom",
2629 .data = &sysctl_panic_on_oom,
2630 .maxlen = sizeof(sysctl_panic_on_oom),
2632 .proc_handler = proc_dointvec_minmax,
2633 .extra1 = SYSCTL_ZERO,
2637 .procname = "oom_kill_allocating_task",
2638 .data = &sysctl_oom_kill_allocating_task,
2639 .maxlen = sizeof(sysctl_oom_kill_allocating_task),
2641 .proc_handler = proc_dointvec,
2644 .procname = "oom_dump_tasks",
2645 .data = &sysctl_oom_dump_tasks,
2646 .maxlen = sizeof(sysctl_oom_dump_tasks),
2648 .proc_handler = proc_dointvec,
2651 .procname = "overcommit_ratio",
2652 .data = &sysctl_overcommit_ratio,
2653 .maxlen = sizeof(sysctl_overcommit_ratio),
2655 .proc_handler = overcommit_ratio_handler,
2658 .procname = "overcommit_kbytes",
2659 .data = &sysctl_overcommit_kbytes,
2660 .maxlen = sizeof(sysctl_overcommit_kbytes),
2662 .proc_handler = overcommit_kbytes_handler,
2665 .procname = "page-cluster",
2666 .data = &page_cluster,
2667 .maxlen = sizeof(int),
2669 .proc_handler = proc_dointvec_minmax,
2670 .extra1 = SYSCTL_ZERO,
2673 .procname = "dirty_background_ratio",
2674 .data = &dirty_background_ratio,
2675 .maxlen = sizeof(dirty_background_ratio),
2677 .proc_handler = dirty_background_ratio_handler,
2678 .extra1 = SYSCTL_ZERO,
2679 .extra2 = &one_hundred,
2682 .procname = "dirty_background_bytes",
2683 .data = &dirty_background_bytes,
2684 .maxlen = sizeof(dirty_background_bytes),
2686 .proc_handler = dirty_background_bytes_handler,
2690 .procname = "dirty_ratio",
2691 .data = &vm_dirty_ratio,
2692 .maxlen = sizeof(vm_dirty_ratio),
2694 .proc_handler = dirty_ratio_handler,
2695 .extra1 = SYSCTL_ZERO,
2696 .extra2 = &one_hundred,
2699 .procname = "dirty_bytes",
2700 .data = &vm_dirty_bytes,
2701 .maxlen = sizeof(vm_dirty_bytes),
2703 .proc_handler = dirty_bytes_handler,
2704 .extra1 = &dirty_bytes_min,
2707 .procname = "dirty_writeback_centisecs",
2708 .data = &dirty_writeback_interval,
2709 .maxlen = sizeof(dirty_writeback_interval),
2711 .proc_handler = dirty_writeback_centisecs_handler,
2714 .procname = "dirty_expire_centisecs",
2715 .data = &dirty_expire_interval,
2716 .maxlen = sizeof(dirty_expire_interval),
2718 .proc_handler = proc_dointvec_minmax,
2719 .extra1 = SYSCTL_ZERO,
2722 .procname = "dirtytime_expire_seconds",
2723 .data = &dirtytime_expire_interval,
2724 .maxlen = sizeof(dirtytime_expire_interval),
2726 .proc_handler = dirtytime_interval_handler,
2727 .extra1 = SYSCTL_ZERO,
2730 .procname = "swappiness",
2731 .data = &vm_swappiness,
2732 .maxlen = sizeof(vm_swappiness),
2734 .proc_handler = proc_dointvec_minmax,
2735 .extra1 = SYSCTL_ZERO,
2736 .extra2 = &two_hundred,
2738 #ifdef CONFIG_HUGETLB_PAGE
2740 .procname = "nr_hugepages",
2742 .maxlen = sizeof(unsigned long),
2744 .proc_handler = hugetlb_sysctl_handler,
2748 .procname = "nr_hugepages_mempolicy",
2750 .maxlen = sizeof(unsigned long),
2752 .proc_handler = &hugetlb_mempolicy_sysctl_handler,
2755 .procname = "numa_stat",
2756 .data = &sysctl_vm_numa_stat,
2757 .maxlen = sizeof(int),
2759 .proc_handler = sysctl_vm_numa_stat_handler,
2760 .extra1 = SYSCTL_ZERO,
2761 .extra2 = SYSCTL_ONE,
2765 .procname = "hugetlb_shm_group",
2766 .data = &sysctl_hugetlb_shm_group,
2767 .maxlen = sizeof(gid_t),
2769 .proc_handler = proc_dointvec,
2772 .procname = "nr_overcommit_hugepages",
2774 .maxlen = sizeof(unsigned long),
2776 .proc_handler = hugetlb_overcommit_handler,
2780 .procname = "lowmem_reserve_ratio",
2781 .data = &sysctl_lowmem_reserve_ratio,
2782 .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
2784 .proc_handler = lowmem_reserve_ratio_sysctl_handler,
2787 .procname = "drop_caches",
2788 .data = &sysctl_drop_caches,
2789 .maxlen = sizeof(int),
2791 .proc_handler = drop_caches_sysctl_handler,
2792 .extra1 = SYSCTL_ONE,
2795 #ifdef CONFIG_COMPACTION
2797 .procname = "compact_memory",
2798 .data = &sysctl_compact_memory,
2799 .maxlen = sizeof(int),
2801 .proc_handler = sysctl_compaction_handler,
2804 .procname = "extfrag_threshold",
2805 .data = &sysctl_extfrag_threshold,
2806 .maxlen = sizeof(int),
2808 .proc_handler = proc_dointvec_minmax,
2809 .extra1 = &min_extfrag_threshold,
2810 .extra2 = &max_extfrag_threshold,
2813 .procname = "compact_unevictable_allowed",
2814 .data = &sysctl_compact_unevictable_allowed,
2815 .maxlen = sizeof(int),
2817 .proc_handler = proc_dointvec_minmax_warn_RT_change,
2818 .extra1 = SYSCTL_ZERO,
2819 .extra2 = SYSCTL_ONE,
2822 #endif /* CONFIG_COMPACTION */
2824 .procname = "min_free_kbytes",
2825 .data = &min_free_kbytes,
2826 .maxlen = sizeof(min_free_kbytes),
2828 .proc_handler = min_free_kbytes_sysctl_handler,
2829 .extra1 = SYSCTL_ZERO,
2832 .procname = "watermark_boost_factor",
2833 .data = &watermark_boost_factor,
2834 .maxlen = sizeof(watermark_boost_factor),
2836 .proc_handler = proc_dointvec_minmax,
2837 .extra1 = SYSCTL_ZERO,
2840 .procname = "watermark_scale_factor",
2841 .data = &watermark_scale_factor,
2842 .maxlen = sizeof(watermark_scale_factor),
2844 .proc_handler = watermark_scale_factor_sysctl_handler,
2845 .extra1 = SYSCTL_ONE,
2846 .extra2 = &one_thousand,
2849 .procname = "percpu_pagelist_fraction",
2850 .data = &percpu_pagelist_fraction,
2851 .maxlen = sizeof(percpu_pagelist_fraction),
2853 .proc_handler = percpu_pagelist_fraction_sysctl_handler,
2854 .extra1 = SYSCTL_ZERO,
2858 .procname = "max_map_count",
2859 .data = &sysctl_max_map_count,
2860 .maxlen = sizeof(sysctl_max_map_count),
2862 .proc_handler = proc_dointvec_minmax,
2863 .extra1 = SYSCTL_ZERO,
2867 .procname = "nr_trim_pages",
2868 .data = &sysctl_nr_trim_pages,
2869 .maxlen = sizeof(sysctl_nr_trim_pages),
2871 .proc_handler = proc_dointvec_minmax,
2872 .extra1 = SYSCTL_ZERO,
2876 .procname = "laptop_mode",
2877 .data = &laptop_mode,
2878 .maxlen = sizeof(laptop_mode),
2880 .proc_handler = proc_dointvec_jiffies,
2883 .procname = "block_dump",
2884 .data = &block_dump,
2885 .maxlen = sizeof(block_dump),
2887 .proc_handler = proc_dointvec,
2888 .extra1 = SYSCTL_ZERO,
2891 .procname = "vfs_cache_pressure",
2892 .data = &sysctl_vfs_cache_pressure,
2893 .maxlen = sizeof(sysctl_vfs_cache_pressure),
2895 .proc_handler = proc_dointvec,
2896 .extra1 = SYSCTL_ZERO,
2898 #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
2899 defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
2901 .procname = "legacy_va_layout",
2902 .data = &sysctl_legacy_va_layout,
2903 .maxlen = sizeof(sysctl_legacy_va_layout),
2905 .proc_handler = proc_dointvec,
2906 .extra1 = SYSCTL_ZERO,
2911 .procname = "zone_reclaim_mode",
2912 .data = &node_reclaim_mode,
2913 .maxlen = sizeof(node_reclaim_mode),
2915 .proc_handler = proc_dointvec,
2916 .extra1 = SYSCTL_ZERO,
2919 .procname = "min_unmapped_ratio",
2920 .data = &sysctl_min_unmapped_ratio,
2921 .maxlen = sizeof(sysctl_min_unmapped_ratio),
2923 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
2924 .extra1 = SYSCTL_ZERO,
2925 .extra2 = &one_hundred,
2928 .procname = "min_slab_ratio",
2929 .data = &sysctl_min_slab_ratio,
2930 .maxlen = sizeof(sysctl_min_slab_ratio),
2932 .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
2933 .extra1 = SYSCTL_ZERO,
2934 .extra2 = &one_hundred,
2939 .procname = "stat_interval",
2940 .data = &sysctl_stat_interval,
2941 .maxlen = sizeof(sysctl_stat_interval),
2943 .proc_handler = proc_dointvec_jiffies,
2946 .procname = "stat_refresh",
2950 .proc_handler = vmstat_refresh,
2955 .procname = "mmap_min_addr",
2956 .data = &dac_mmap_min_addr,
2957 .maxlen = sizeof(unsigned long),
2959 .proc_handler = mmap_min_addr_handler,
2964 .procname = "numa_zonelist_order",
2965 .data = &numa_zonelist_order,
2966 .maxlen = NUMA_ZONELIST_ORDER_LEN,
2968 .proc_handler = numa_zonelist_order_handler,
2971 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
2972 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
2974 .procname = "vdso_enabled",
2975 #ifdef CONFIG_X86_32
2976 .data = &vdso32_enabled,
2977 .maxlen = sizeof(vdso32_enabled),
2979 .data = &vdso_enabled,
2980 .maxlen = sizeof(vdso_enabled),
2983 .proc_handler = proc_dointvec,
2984 .extra1 = SYSCTL_ZERO,
2987 #ifdef CONFIG_HIGHMEM
2989 .procname = "highmem_is_dirtyable",
2990 .data = &vm_highmem_is_dirtyable,
2991 .maxlen = sizeof(vm_highmem_is_dirtyable),
2993 .proc_handler = proc_dointvec_minmax,
2994 .extra1 = SYSCTL_ZERO,
2995 .extra2 = SYSCTL_ONE,
2998 #ifdef CONFIG_MEMORY_FAILURE
3000 .procname = "memory_failure_early_kill",
3001 .data = &sysctl_memory_failure_early_kill,
3002 .maxlen = sizeof(sysctl_memory_failure_early_kill),
3004 .proc_handler = proc_dointvec_minmax,
3005 .extra1 = SYSCTL_ZERO,
3006 .extra2 = SYSCTL_ONE,
3009 .procname = "memory_failure_recovery",
3010 .data = &sysctl_memory_failure_recovery,
3011 .maxlen = sizeof(sysctl_memory_failure_recovery),
3013 .proc_handler = proc_dointvec_minmax,
3014 .extra1 = SYSCTL_ZERO,
3015 .extra2 = SYSCTL_ONE,
3019 .procname = "user_reserve_kbytes",
3020 .data = &sysctl_user_reserve_kbytes,
3021 .maxlen = sizeof(sysctl_user_reserve_kbytes),
3023 .proc_handler = proc_doulongvec_minmax,
3026 .procname = "admin_reserve_kbytes",
3027 .data = &sysctl_admin_reserve_kbytes,
3028 .maxlen = sizeof(sysctl_admin_reserve_kbytes),
3030 .proc_handler = proc_doulongvec_minmax,
3032 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS
3034 .procname = "mmap_rnd_bits",
3035 .data = &mmap_rnd_bits,
3036 .maxlen = sizeof(mmap_rnd_bits),
3038 .proc_handler = proc_dointvec_minmax,
3039 .extra1 = (void *)&mmap_rnd_bits_min,
3040 .extra2 = (void *)&mmap_rnd_bits_max,
3043 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
3045 .procname = "mmap_rnd_compat_bits",
3046 .data = &mmap_rnd_compat_bits,
3047 .maxlen = sizeof(mmap_rnd_compat_bits),
3049 .proc_handler = proc_dointvec_minmax,
3050 .extra1 = (void *)&mmap_rnd_compat_bits_min,
3051 .extra2 = (void *)&mmap_rnd_compat_bits_max,
3054 #ifdef CONFIG_USERFAULTFD
3056 .procname = "unprivileged_userfaultfd",
3057 .data = &sysctl_unprivileged_userfaultfd,
3058 .maxlen = sizeof(sysctl_unprivileged_userfaultfd),
3060 .proc_handler = proc_dointvec_minmax,
3061 .extra1 = SYSCTL_ZERO,
3062 .extra2 = SYSCTL_ONE,
3068 static struct ctl_table fs_table[] = {
3070 .procname = "inode-nr",
3071 .data = &inodes_stat,
3072 .maxlen = 2*sizeof(long),
3074 .proc_handler = proc_nr_inodes,
3077 .procname = "inode-state",
3078 .data = &inodes_stat,
3079 .maxlen = 7*sizeof(long),
3081 .proc_handler = proc_nr_inodes,
3084 .procname = "file-nr",
3085 .data = &files_stat,
3086 .maxlen = sizeof(files_stat),
3088 .proc_handler = proc_nr_files,
3091 .procname = "file-max",
3092 .data = &files_stat.max_files,
3093 .maxlen = sizeof(files_stat.max_files),
3095 .proc_handler = proc_doulongvec_minmax,
3097 .extra2 = &long_max,
3100 .procname = "nr_open",
3101 .data = &sysctl_nr_open,
3102 .maxlen = sizeof(unsigned int),
3104 .proc_handler = proc_dointvec_minmax,
3105 .extra1 = &sysctl_nr_open_min,
3106 .extra2 = &sysctl_nr_open_max,
3109 .procname = "dentry-state",
3110 .data = &dentry_stat,
3111 .maxlen = 6*sizeof(long),
3113 .proc_handler = proc_nr_dentry,
3116 .procname = "overflowuid",
3117 .data = &fs_overflowuid,
3118 .maxlen = sizeof(int),
3120 .proc_handler = proc_dointvec_minmax,
3121 .extra1 = &minolduid,
3122 .extra2 = &maxolduid,
3125 .procname = "overflowgid",
3126 .data = &fs_overflowgid,
3127 .maxlen = sizeof(int),
3129 .proc_handler = proc_dointvec_minmax,
3130 .extra1 = &minolduid,
3131 .extra2 = &maxolduid,
3133 #ifdef CONFIG_FILE_LOCKING
3135 .procname = "leases-enable",
3136 .data = &leases_enable,
3137 .maxlen = sizeof(int),
3139 .proc_handler = proc_dointvec,
3142 #ifdef CONFIG_DNOTIFY
3144 .procname = "dir-notify-enable",
3145 .data = &dir_notify_enable,
3146 .maxlen = sizeof(int),
3148 .proc_handler = proc_dointvec,
3152 #ifdef CONFIG_FILE_LOCKING
3154 .procname = "lease-break-time",
3155 .data = &lease_break_time,
3156 .maxlen = sizeof(int),
3158 .proc_handler = proc_dointvec,
3163 .procname = "aio-nr",
3165 .maxlen = sizeof(aio_nr),
3167 .proc_handler = proc_doulongvec_minmax,
3170 .procname = "aio-max-nr",
3171 .data = &aio_max_nr,
3172 .maxlen = sizeof(aio_max_nr),
3174 .proc_handler = proc_doulongvec_minmax,
3176 #endif /* CONFIG_AIO */
3177 #ifdef CONFIG_INOTIFY_USER
3179 .procname = "inotify",
3181 .child = inotify_table,
3186 .procname = "epoll",
3188 .child = epoll_table,
3193 .procname = "protected_symlinks",
3194 .data = &sysctl_protected_symlinks,
3195 .maxlen = sizeof(int),
3197 .proc_handler = proc_dointvec_minmax,
3198 .extra1 = SYSCTL_ZERO,
3199 .extra2 = SYSCTL_ONE,
3202 .procname = "protected_hardlinks",
3203 .data = &sysctl_protected_hardlinks,
3204 .maxlen = sizeof(int),
3206 .proc_handler = proc_dointvec_minmax,
3207 .extra1 = SYSCTL_ZERO,
3208 .extra2 = SYSCTL_ONE,
3211 .procname = "protected_fifos",
3212 .data = &sysctl_protected_fifos,
3213 .maxlen = sizeof(int),
3215 .proc_handler = proc_dointvec_minmax,
3216 .extra1 = SYSCTL_ZERO,
3220 .procname = "protected_regular",
3221 .data = &sysctl_protected_regular,
3222 .maxlen = sizeof(int),
3224 .proc_handler = proc_dointvec_minmax,
3225 .extra1 = SYSCTL_ZERO,
3229 .procname = "suid_dumpable",
3230 .data = &suid_dumpable,
3231 .maxlen = sizeof(int),
3233 .proc_handler = proc_dointvec_minmax_coredump,
3234 .extra1 = SYSCTL_ZERO,
3237 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
3239 .procname = "binfmt_misc",
3241 .child = sysctl_mount_point,
3245 .procname = "pipe-max-size",
3246 .data = &pipe_max_size,
3247 .maxlen = sizeof(pipe_max_size),
3249 .proc_handler = proc_dopipe_max_size,
3252 .procname = "pipe-user-pages-hard",
3253 .data = &pipe_user_pages_hard,
3254 .maxlen = sizeof(pipe_user_pages_hard),
3256 .proc_handler = proc_doulongvec_minmax,
3259 .procname = "pipe-user-pages-soft",
3260 .data = &pipe_user_pages_soft,
3261 .maxlen = sizeof(pipe_user_pages_soft),
3263 .proc_handler = proc_doulongvec_minmax,
3266 .procname = "mount-max",
3267 .data = &sysctl_mount_max,
3268 .maxlen = sizeof(unsigned int),
3270 .proc_handler = proc_dointvec_minmax,
3271 .extra1 = SYSCTL_ONE,
3276 static struct ctl_table debug_table[] = {
3277 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
3279 .procname = "exception-trace",
3280 .data = &show_unhandled_signals,
3281 .maxlen = sizeof(int),
3283 .proc_handler = proc_dointvec
3286 #if defined(CONFIG_OPTPROBES)
3288 .procname = "kprobes-optimization",
3289 .data = &sysctl_kprobes_optimization,
3290 .maxlen = sizeof(int),
3292 .proc_handler = proc_kprobes_optimization_handler,
3293 .extra1 = SYSCTL_ZERO,
3294 .extra2 = SYSCTL_ONE,
3300 static struct ctl_table dev_table[] = {
3304 static struct ctl_table sysctl_base_table[] = {
3306 .procname = "kernel",
3308 .child = kern_table,
3321 .procname = "debug",
3323 .child = debug_table,
3333 int __init sysctl_init(void)
3335 struct ctl_table_header *hdr;
3337 hdr = register_sysctl_table(sysctl_base_table);
3338 kmemleak_not_leak(hdr);
3341 #endif /* CONFIG_SYSCTL */
3343 * No sense putting this after each symbol definition, twice,
3344 * exception granted :-)
3346 EXPORT_SYMBOL(proc_dointvec);
3347 EXPORT_SYMBOL(proc_douintvec);
3348 EXPORT_SYMBOL(proc_dointvec_jiffies);
3349 EXPORT_SYMBOL(proc_dointvec_minmax);
3350 EXPORT_SYMBOL_GPL(proc_douintvec_minmax);
3351 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
3352 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
3353 EXPORT_SYMBOL(proc_dostring);
3354 EXPORT_SYMBOL(proc_doulongvec_minmax);
3355 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
3356 EXPORT_SYMBOL(proc_do_large_bitmap);