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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * sysctl.c: General linux system control interface | |
4 | * | |
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 | |
13 | * Horn. | |
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 | |
17 | * Wendling. | |
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 | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/module.h> |
23 | #include <linux/mm.h> | |
24 | #include <linux/swap.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/sysctl.h> | |
5a04cca6 | 27 | #include <linux/bitmap.h> |
d33ed52d | 28 | #include <linux/signal.h> |
f39650de | 29 | #include <linux/panic.h> |
455cd5ab | 30 | #include <linux/printk.h> |
1da177e4 | 31 | #include <linux/proc_fs.h> |
72c2d582 | 32 | #include <linux/security.h> |
1da177e4 | 33 | #include <linux/ctype.h> |
fd4b616b | 34 | #include <linux/kmemleak.h> |
b6459415 | 35 | #include <linux/filter.h> |
62239ac2 | 36 | #include <linux/fs.h> |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <linux/kernel.h> | |
0296b228 | 39 | #include <linux/kobject.h> |
20380731 | 40 | #include <linux/net.h> |
1da177e4 LT |
41 | #include <linux/sysrq.h> |
42 | #include <linux/highuid.h> | |
43 | #include <linux/writeback.h> | |
3fff4c42 | 44 | #include <linux/ratelimit.h> |
76ab0f53 | 45 | #include <linux/compaction.h> |
1da177e4 | 46 | #include <linux/hugetlb.h> |
1da177e4 | 47 | #include <linux/initrd.h> |
0b77f5bf | 48 | #include <linux/key.h> |
1da177e4 LT |
49 | #include <linux/times.h> |
50 | #include <linux/limits.h> | |
51 | #include <linux/dcache.h> | |
52 | #include <linux/syscalls.h> | |
c748e134 | 53 | #include <linux/vmstat.h> |
c255d844 PM |
54 | #include <linux/nfs_fs.h> |
55 | #include <linux/acpi.h> | |
10a0a8d4 | 56 | #include <linux/reboot.h> |
b0fc494f | 57 | #include <linux/ftrace.h> |
cdd6c482 | 58 | #include <linux/perf_event.h> |
8e4228e1 | 59 | #include <linux/oom.h> |
17f60a7d | 60 | #include <linux/kmod.h> |
73efc039 | 61 | #include <linux/capability.h> |
40401530 | 62 | #include <linux/binfmts.h> |
cf4aebc2 | 63 | #include <linux/sched/sysctl.h> |
7984754b | 64 | #include <linux/kexec.h> |
1be7f75d | 65 | #include <linux/bpf.h> |
d2921684 | 66 | #include <linux/mount.h> |
cefdca0a | 67 | #include <linux/userfaultfd_k.h> |
2374c09b CH |
68 | #include <linux/latencytop.h> |
69 | #include <linux/pid.h> | |
0cd7c741 | 70 | #include <linux/delayacct.h> |
1da177e4 | 71 | |
7f2923c4 CB |
72 | #include "../lib/kstrtox.h" |
73 | ||
7c0f6ba6 | 74 | #include <linux/uaccess.h> |
1da177e4 LT |
75 | #include <asm/processor.h> |
76 | ||
29cbc78b AK |
77 | #ifdef CONFIG_X86 |
78 | #include <asm/nmi.h> | |
0741f4d2 | 79 | #include <asm/stacktrace.h> |
6e7c4025 | 80 | #include <asm/io.h> |
29cbc78b | 81 | #endif |
d550bbd4 DH |
82 | #ifdef CONFIG_SPARC |
83 | #include <asm/setup.h> | |
84 | #endif | |
c55b7c3e DY |
85 | #ifdef CONFIG_BSD_PROCESS_ACCT |
86 | #include <linux/acct.h> | |
87 | #endif | |
4f0e056f DY |
88 | #ifdef CONFIG_RT_MUTEXES |
89 | #include <linux/rtmutex.h> | |
90 | #endif | |
2edf5e49 DY |
91 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
92 | #include <linux/lockdep.h> | |
93 | #endif | |
504d7cf1 | 94 | |
1da177e4 LT |
95 | #if defined(CONFIG_SYSCTL) |
96 | ||
c4f3b63f | 97 | /* Constants used for minimum and maximum */ |
c4f3b63f | 98 | |
c5dfd78e | 99 | #ifdef CONFIG_PERF_EVENTS |
d73840ec | 100 | static const int six_hundred_forty_kb = 640 * 1024; |
c5dfd78e | 101 | #endif |
c4f3b63f | 102 | |
9e4a5bda | 103 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
d73840ec | 104 | static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE; |
9e4a5bda | 105 | |
f628867d | 106 | static const int ngroups_max = NGROUPS_MAX; |
73efc039 | 107 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 108 | |
d6f8ff73 | 109 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 | 110 | |
a19ac337 LR |
111 | /** |
112 | * enum sysctl_writes_mode - supported sysctl write modes | |
113 | * | |
114 | * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value | |
65f50f25 WH |
115 | * to be written, and multiple writes on the same sysctl file descriptor |
116 | * will rewrite the sysctl value, regardless of file position. No warning | |
117 | * is issued when the initial position is not 0. | |
a19ac337 | 118 | * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is |
65f50f25 | 119 | * not 0. |
a19ac337 | 120 | * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at |
65f50f25 WH |
121 | * file position 0 and the value must be fully contained in the buffer |
122 | * sent to the write syscall. If dealing with strings respect the file | |
123 | * position, but restrict this to the max length of the buffer, anything | |
124 | * passed the max length will be ignored. Multiple writes will append | |
125 | * to the buffer. | |
a19ac337 LR |
126 | * |
127 | * These write modes control how current file position affects the behavior of | |
128 | * updating sysctl values through the proc interface on each write. | |
129 | */ | |
130 | enum sysctl_writes_mode { | |
131 | SYSCTL_WRITES_LEGACY = -1, | |
132 | SYSCTL_WRITES_WARN = 0, | |
133 | SYSCTL_WRITES_STRICT = 1, | |
134 | }; | |
f4aacea2 | 135 | |
a19ac337 | 136 | static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f461d2dc | 137 | #endif /* CONFIG_PROC_SYSCTL */ |
ceb18132 | 138 | |
67f3977f AG |
139 | #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \ |
140 | defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) | |
1da177e4 LT |
141 | int sysctl_legacy_va_layout; |
142 | #endif | |
143 | ||
5e771905 | 144 | #ifdef CONFIG_COMPACTION |
2452dcb9 | 145 | /* min_extfrag_threshold is SYSCTL_ZERO */; |
d73840ec | 146 | static const int max_extfrag_threshold = 1000; |
5e771905 MG |
147 | #endif |
148 | ||
f461d2dc CH |
149 | #endif /* CONFIG_SYSCTL */ |
150 | ||
5447e8e0 | 151 | #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL) |
d46edd67 | 152 | static int bpf_stats_handler(struct ctl_table *table, int write, |
7787b6fc | 153 | void *buffer, size_t *lenp, loff_t *ppos) |
d46edd67 SL |
154 | { |
155 | struct static_key *key = (struct static_key *)table->data; | |
156 | static int saved_val; | |
157 | int val, ret; | |
158 | struct ctl_table tmp = { | |
159 | .data = &val, | |
160 | .maxlen = sizeof(val), | |
161 | .mode = table->mode, | |
162 | .extra1 = SYSCTL_ZERO, | |
163 | .extra2 = SYSCTL_ONE, | |
164 | }; | |
165 | ||
166 | if (write && !capable(CAP_SYS_ADMIN)) | |
167 | return -EPERM; | |
168 | ||
169 | mutex_lock(&bpf_stats_enabled_mutex); | |
170 | val = saved_val; | |
171 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
172 | if (write && !ret && val != saved_val) { | |
173 | if (val) | |
174 | static_key_slow_inc(key); | |
175 | else | |
176 | static_key_slow_dec(key); | |
177 | saved_val = val; | |
178 | } | |
179 | mutex_unlock(&bpf_stats_enabled_mutex); | |
180 | return ret; | |
181 | } | |
08389d88 | 182 | |
44a3918c JP |
183 | void __weak unpriv_ebpf_notify(int new_state) |
184 | { | |
185 | } | |
186 | ||
08389d88 DB |
187 | static int bpf_unpriv_handler(struct ctl_table *table, int write, |
188 | void *buffer, size_t *lenp, loff_t *ppos) | |
189 | { | |
190 | int ret, unpriv_enable = *(int *)table->data; | |
191 | bool locked_state = unpriv_enable == 1; | |
192 | struct ctl_table tmp = *table; | |
193 | ||
194 | if (write && !capable(CAP_SYS_ADMIN)) | |
195 | return -EPERM; | |
196 | ||
197 | tmp.data = &unpriv_enable; | |
198 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
199 | if (write && !ret) { | |
200 | if (locked_state && unpriv_enable != 1) | |
201 | return -EPERM; | |
202 | *(int *)table->data = unpriv_enable; | |
203 | } | |
44a3918c JP |
204 | |
205 | unpriv_ebpf_notify(unpriv_enable); | |
206 | ||
08389d88 DB |
207 | return ret; |
208 | } | |
209 | #endif /* CONFIG_BPF_SYSCALL && CONFIG_SYSCTL */ | |
d46edd67 | 210 | |
f461d2dc CH |
211 | /* |
212 | * /proc/sys support | |
213 | */ | |
214 | ||
b89a8171 | 215 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 216 | |
f8808300 | 217 | static int _proc_do_string(char *data, int maxlen, int write, |
32927393 | 218 | char *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
219 | { |
220 | size_t len; | |
32927393 | 221 | char c, *p; |
8d060877 ON |
222 | |
223 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
224 | *lenp = 0; |
225 | return 0; | |
226 | } | |
8d060877 | 227 | |
1da177e4 | 228 | if (write) { |
f4aacea2 KC |
229 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
230 | /* Only continue writes not past the end of buffer. */ | |
231 | len = strlen(data); | |
232 | if (len > maxlen - 1) | |
233 | len = maxlen - 1; | |
234 | ||
235 | if (*ppos > len) | |
236 | return 0; | |
237 | len = *ppos; | |
238 | } else { | |
239 | /* Start writing from beginning of buffer. */ | |
240 | len = 0; | |
241 | } | |
242 | ||
2ca9bb45 | 243 | *ppos += *lenp; |
1da177e4 | 244 | p = buffer; |
2ca9bb45 | 245 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
32927393 | 246 | c = *(p++); |
1da177e4 LT |
247 | if (c == 0 || c == '\n') |
248 | break; | |
2ca9bb45 | 249 | data[len++] = c; |
1da177e4 | 250 | } |
f8808300 | 251 | data[len] = 0; |
1da177e4 | 252 | } else { |
f5dd3d6f SV |
253 | len = strlen(data); |
254 | if (len > maxlen) | |
255 | len = maxlen; | |
8d060877 ON |
256 | |
257 | if (*ppos > len) { | |
258 | *lenp = 0; | |
259 | return 0; | |
260 | } | |
261 | ||
262 | data += *ppos; | |
263 | len -= *ppos; | |
264 | ||
1da177e4 LT |
265 | if (len > *lenp) |
266 | len = *lenp; | |
267 | if (len) | |
32927393 | 268 | memcpy(buffer, data, len); |
1da177e4 | 269 | if (len < *lenp) { |
32927393 | 270 | buffer[len] = '\n'; |
1da177e4 LT |
271 | len++; |
272 | } | |
273 | *lenp = len; | |
274 | *ppos += len; | |
275 | } | |
276 | return 0; | |
277 | } | |
278 | ||
f4aacea2 KC |
279 | static void warn_sysctl_write(struct ctl_table *table) |
280 | { | |
281 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
282 | "This will not be supported in the future. To silence this\n" | |
283 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
284 | current->comm, table->procname); | |
285 | } | |
286 | ||
d383d484 | 287 | /** |
5f733e8a | 288 | * proc_first_pos_non_zero_ignore - check if first position is allowed |
d383d484 LR |
289 | * @ppos: file position |
290 | * @table: the sysctl table | |
291 | * | |
292 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
293 | * mode indicates this is not allowed for numeric input types. String proc | |
5f733e8a | 294 | * handlers can ignore the return value. |
d383d484 LR |
295 | */ |
296 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
297 | struct ctl_table *table) | |
298 | { | |
299 | if (!*ppos) | |
300 | return false; | |
301 | ||
302 | switch (sysctl_writes_strict) { | |
303 | case SYSCTL_WRITES_STRICT: | |
304 | return true; | |
305 | case SYSCTL_WRITES_WARN: | |
306 | warn_sysctl_write(table); | |
307 | return false; | |
308 | default: | |
309 | return false; | |
310 | } | |
311 | } | |
312 | ||
f5dd3d6f SV |
313 | /** |
314 | * proc_dostring - read a string sysctl | |
315 | * @table: the sysctl table | |
316 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
317 | * @buffer: the user buffer |
318 | * @lenp: the size of the user buffer | |
319 | * @ppos: file position | |
320 | * | |
321 | * Reads/writes a string from/to the user buffer. If the kernel | |
322 | * buffer provided is not large enough to hold the string, the | |
323 | * string is truncated. The copied string is %NULL-terminated. | |
324 | * If the string is being read by the user process, it is copied | |
325 | * and a newline '\n' is added. It is truncated if the buffer is | |
326 | * not large enough. | |
327 | * | |
328 | * Returns 0 on success. | |
329 | */ | |
8d65af78 | 330 | int proc_dostring(struct ctl_table *table, int write, |
32927393 | 331 | void *buffer, size_t *lenp, loff_t *ppos) |
f5dd3d6f | 332 | { |
d383d484 LR |
333 | if (write) |
334 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 335 | |
32927393 CH |
336 | return _proc_do_string(table->data, table->maxlen, write, buffer, lenp, |
337 | ppos); | |
f5dd3d6f SV |
338 | } |
339 | ||
00b7c339 AW |
340 | static size_t proc_skip_spaces(char **buf) |
341 | { | |
342 | size_t ret; | |
343 | char *tmp = skip_spaces(*buf); | |
344 | ret = tmp - *buf; | |
345 | *buf = tmp; | |
346 | return ret; | |
347 | } | |
348 | ||
9f977fb7 OP |
349 | static void proc_skip_char(char **buf, size_t *size, const char v) |
350 | { | |
351 | while (*size) { | |
352 | if (**buf != v) | |
353 | break; | |
354 | (*size)--; | |
355 | (*buf)++; | |
356 | } | |
357 | } | |
358 | ||
7f2923c4 CB |
359 | /** |
360 | * strtoul_lenient - parse an ASCII formatted integer from a buffer and only | |
361 | * fail on overflow | |
362 | * | |
363 | * @cp: kernel buffer containing the string to parse | |
364 | * @endp: pointer to store the trailing characters | |
365 | * @base: the base to use | |
366 | * @res: where the parsed integer will be stored | |
367 | * | |
368 | * In case of success 0 is returned and @res will contain the parsed integer, | |
369 | * @endp will hold any trailing characters. | |
370 | * This function will fail the parse on overflow. If there wasn't an overflow | |
371 | * the function will defer the decision what characters count as invalid to the | |
372 | * caller. | |
373 | */ | |
374 | static int strtoul_lenient(const char *cp, char **endp, unsigned int base, | |
375 | unsigned long *res) | |
376 | { | |
377 | unsigned long long result; | |
378 | unsigned int rv; | |
379 | ||
380 | cp = _parse_integer_fixup_radix(cp, &base); | |
381 | rv = _parse_integer(cp, base, &result); | |
382 | if ((rv & KSTRTOX_OVERFLOW) || (result != (unsigned long)result)) | |
383 | return -ERANGE; | |
384 | ||
385 | cp += rv; | |
386 | ||
387 | if (endp) | |
388 | *endp = (char *)cp; | |
389 | ||
390 | *res = (unsigned long)result; | |
391 | return 0; | |
392 | } | |
393 | ||
00b7c339 AW |
394 | #define TMPBUFLEN 22 |
395 | /** | |
0fc377bd | 396 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 397 | * |
0fc377bd RD |
398 | * @buf: a kernel buffer |
399 | * @size: size of the kernel buffer | |
400 | * @val: this is where the number will be stored | |
401 | * @neg: set to %TRUE if number is negative | |
402 | * @perm_tr: a vector which contains the allowed trailers | |
403 | * @perm_tr_len: size of the perm_tr vector | |
404 | * @tr: pointer to store the trailer character | |
00b7c339 | 405 | * |
0fc377bd RD |
406 | * In case of success %0 is returned and @buf and @size are updated with |
407 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
408 | * character exists (size is non-zero after returning from this | |
409 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
410 | */ |
411 | static int proc_get_long(char **buf, size_t *size, | |
412 | unsigned long *val, bool *neg, | |
413 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
414 | { | |
415 | int len; | |
416 | char *p, tmp[TMPBUFLEN]; | |
417 | ||
418 | if (!*size) | |
419 | return -EINVAL; | |
420 | ||
421 | len = *size; | |
422 | if (len > TMPBUFLEN - 1) | |
423 | len = TMPBUFLEN - 1; | |
424 | ||
425 | memcpy(tmp, *buf, len); | |
426 | ||
427 | tmp[len] = 0; | |
428 | p = tmp; | |
429 | if (*p == '-' && *size > 1) { | |
430 | *neg = true; | |
431 | p++; | |
432 | } else | |
433 | *neg = false; | |
434 | if (!isdigit(*p)) | |
435 | return -EINVAL; | |
436 | ||
7f2923c4 CB |
437 | if (strtoul_lenient(p, &p, 0, val)) |
438 | return -EINVAL; | |
00b7c339 AW |
439 | |
440 | len = p - tmp; | |
441 | ||
442 | /* We don't know if the next char is whitespace thus we may accept | |
443 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
444 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
445 | if (len == TMPBUFLEN - 1) | |
446 | return -EINVAL; | |
447 | ||
448 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
449 | return -EINVAL; | |
1da177e4 | 450 | |
00b7c339 AW |
451 | if (tr && (len < *size)) |
452 | *tr = *p; | |
453 | ||
454 | *buf += len; | |
455 | *size -= len; | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | /** | |
0fc377bd | 461 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 462 | * |
0fc377bd RD |
463 | * @buf: the user buffer |
464 | * @size: the size of the user buffer | |
465 | * @val: the integer to be converted | |
466 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 467 | * |
32927393 CH |
468 | * In case of success @buf and @size are updated with the amount of bytes |
469 | * written. | |
00b7c339 | 470 | */ |
32927393 | 471 | static void proc_put_long(void **buf, size_t *size, unsigned long val, bool neg) |
00b7c339 AW |
472 | { |
473 | int len; | |
474 | char tmp[TMPBUFLEN], *p = tmp; | |
475 | ||
476 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
477 | len = strlen(tmp); | |
478 | if (len > *size) | |
479 | len = *size; | |
32927393 | 480 | memcpy(*buf, tmp, len); |
00b7c339 AW |
481 | *size -= len; |
482 | *buf += len; | |
00b7c339 AW |
483 | } |
484 | #undef TMPBUFLEN | |
485 | ||
32927393 | 486 | static void proc_put_char(void **buf, size_t *size, char c) |
00b7c339 AW |
487 | { |
488 | if (*size) { | |
32927393 CH |
489 | char **buffer = (char **)buf; |
490 | **buffer = c; | |
491 | ||
492 | (*size)--; | |
493 | (*buffer)++; | |
00b7c339 AW |
494 | *buf = *buffer; |
495 | } | |
00b7c339 | 496 | } |
1da177e4 | 497 | |
a2071573 JH |
498 | static int do_proc_dobool_conv(bool *negp, unsigned long *lvalp, |
499 | int *valp, | |
500 | int write, void *data) | |
501 | { | |
502 | if (write) { | |
503 | *(bool *)valp = *lvalp; | |
504 | } else { | |
505 | int val = *(bool *)valp; | |
506 | ||
507 | *lvalp = (unsigned long)val; | |
508 | *negp = false; | |
509 | } | |
510 | return 0; | |
511 | } | |
512 | ||
00b7c339 | 513 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
514 | int *valp, |
515 | int write, void *data) | |
516 | { | |
517 | if (write) { | |
230633d1 HS |
518 | if (*negp) { |
519 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
520 | return -EINVAL; | |
521 | *valp = -*lvalp; | |
522 | } else { | |
523 | if (*lvalp > (unsigned long) INT_MAX) | |
524 | return -EINVAL; | |
525 | *valp = *lvalp; | |
526 | } | |
1da177e4 LT |
527 | } else { |
528 | int val = *valp; | |
529 | if (val < 0) { | |
00b7c339 | 530 | *negp = true; |
9a5bc726 | 531 | *lvalp = -(unsigned long)val; |
1da177e4 | 532 | } else { |
00b7c339 | 533 | *negp = false; |
1da177e4 LT |
534 | *lvalp = (unsigned long)val; |
535 | } | |
536 | } | |
537 | return 0; | |
538 | } | |
539 | ||
4f2fec00 LR |
540 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
541 | unsigned int *valp, | |
542 | int write, void *data) | |
e7d316a0 SAK |
543 | { |
544 | if (write) { | |
425fffd8 LZ |
545 | if (*lvalp > UINT_MAX) |
546 | return -EINVAL; | |
e7d316a0 SAK |
547 | *valp = *lvalp; |
548 | } else { | |
549 | unsigned int val = *valp; | |
550 | *lvalp = (unsigned long)val; | |
551 | } | |
552 | return 0; | |
553 | } | |
554 | ||
00b7c339 AW |
555 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
556 | ||
d8217f07 | 557 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
32927393 | 558 | int write, void *buffer, |
fcfbd547 | 559 | size_t *lenp, loff_t *ppos, |
00b7c339 | 560 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
561 | int write, void *data), |
562 | void *data) | |
563 | { | |
00b7c339 | 564 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 565 | size_t left; |
32927393 | 566 | char *p; |
1da177e4 | 567 | |
00b7c339 | 568 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
569 | *lenp = 0; |
570 | return 0; | |
571 | } | |
572 | ||
fcfbd547 | 573 | i = (int *) tbl_data; |
1da177e4 LT |
574 | vleft = table->maxlen / sizeof(*i); |
575 | left = *lenp; | |
576 | ||
577 | if (!conv) | |
578 | conv = do_proc_dointvec_conv; | |
579 | ||
00b7c339 | 580 | if (write) { |
d383d484 LR |
581 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
582 | goto out; | |
f4aacea2 | 583 | |
00b7c339 AW |
584 | if (left > PAGE_SIZE - 1) |
585 | left = PAGE_SIZE - 1; | |
32927393 | 586 | p = buffer; |
00b7c339 AW |
587 | } |
588 | ||
1da177e4 | 589 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
590 | unsigned long lval; |
591 | bool neg; | |
1da177e4 | 592 | |
00b7c339 | 593 | if (write) { |
70f6cbb6 | 594 | left -= proc_skip_spaces(&p); |
1da177e4 | 595 | |
563b0467 O |
596 | if (!left) |
597 | break; | |
70f6cbb6 | 598 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
599 | proc_wspace_sep, |
600 | sizeof(proc_wspace_sep), NULL); | |
601 | if (err) | |
1da177e4 | 602 | break; |
00b7c339 AW |
603 | if (conv(&neg, &lval, i, 1, data)) { |
604 | err = -EINVAL; | |
1da177e4 | 605 | break; |
00b7c339 | 606 | } |
1da177e4 | 607 | } else { |
00b7c339 AW |
608 | if (conv(&neg, &lval, i, 0, data)) { |
609 | err = -EINVAL; | |
610 | break; | |
611 | } | |
1da177e4 | 612 | if (!first) |
32927393 CH |
613 | proc_put_char(&buffer, &left, '\t'); |
614 | proc_put_long(&buffer, &left, lval, neg); | |
1da177e4 LT |
615 | } |
616 | } | |
617 | ||
00b7c339 | 618 | if (!write && !first && left && !err) |
32927393 | 619 | proc_put_char(&buffer, &left, '\n'); |
563b0467 | 620 | if (write && !err && left) |
70f6cbb6 | 621 | left -= proc_skip_spaces(&p); |
32927393 CH |
622 | if (write && first) |
623 | return err ? : -EINVAL; | |
1da177e4 | 624 | *lenp -= left; |
f4aacea2 | 625 | out: |
1da177e4 | 626 | *ppos += *lenp; |
00b7c339 | 627 | return err; |
1da177e4 LT |
628 | } |
629 | ||
8d65af78 | 630 | static int do_proc_dointvec(struct ctl_table *table, int write, |
32927393 | 631 | void *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 632 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
633 | int write, void *data), |
634 | void *data) | |
635 | { | |
8d65af78 | 636 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
637 | buffer, lenp, ppos, conv, data); |
638 | } | |
639 | ||
4f2fec00 LR |
640 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
641 | struct ctl_table *table, | |
32927393 | 642 | void *buffer, |
4f2fec00 LR |
643 | size_t *lenp, loff_t *ppos, |
644 | int (*conv)(unsigned long *lvalp, | |
645 | unsigned int *valp, | |
646 | int write, void *data), | |
647 | void *data) | |
648 | { | |
649 | unsigned long lval; | |
650 | int err = 0; | |
651 | size_t left; | |
652 | bool neg; | |
32927393 | 653 | char *p = buffer; |
4f2fec00 LR |
654 | |
655 | left = *lenp; | |
656 | ||
657 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
658 | goto bail_early; | |
659 | ||
660 | if (left > PAGE_SIZE - 1) | |
661 | left = PAGE_SIZE - 1; | |
662 | ||
4f2fec00 LR |
663 | left -= proc_skip_spaces(&p); |
664 | if (!left) { | |
665 | err = -EINVAL; | |
666 | goto out_free; | |
667 | } | |
668 | ||
669 | err = proc_get_long(&p, &left, &lval, &neg, | |
670 | proc_wspace_sep, | |
671 | sizeof(proc_wspace_sep), NULL); | |
672 | if (err || neg) { | |
673 | err = -EINVAL; | |
674 | goto out_free; | |
675 | } | |
676 | ||
677 | if (conv(&lval, tbl_data, 1, data)) { | |
678 | err = -EINVAL; | |
679 | goto out_free; | |
680 | } | |
681 | ||
682 | if (!err && left) | |
683 | left -= proc_skip_spaces(&p); | |
684 | ||
685 | out_free: | |
4f2fec00 LR |
686 | if (err) |
687 | return -EINVAL; | |
688 | ||
689 | return 0; | |
690 | ||
691 | /* This is in keeping with old __do_proc_dointvec() */ | |
692 | bail_early: | |
693 | *ppos += *lenp; | |
694 | return err; | |
695 | } | |
696 | ||
32927393 | 697 | static int do_proc_douintvec_r(unsigned int *tbl_data, void *buffer, |
4f2fec00 LR |
698 | size_t *lenp, loff_t *ppos, |
699 | int (*conv)(unsigned long *lvalp, | |
700 | unsigned int *valp, | |
701 | int write, void *data), | |
702 | void *data) | |
703 | { | |
704 | unsigned long lval; | |
705 | int err = 0; | |
706 | size_t left; | |
707 | ||
708 | left = *lenp; | |
709 | ||
710 | if (conv(&lval, tbl_data, 0, data)) { | |
711 | err = -EINVAL; | |
712 | goto out; | |
713 | } | |
714 | ||
32927393 CH |
715 | proc_put_long(&buffer, &left, lval, false); |
716 | if (!left) | |
4f2fec00 LR |
717 | goto out; |
718 | ||
32927393 | 719 | proc_put_char(&buffer, &left, '\n'); |
4f2fec00 LR |
720 | |
721 | out: | |
722 | *lenp -= left; | |
723 | *ppos += *lenp; | |
724 | ||
725 | return err; | |
726 | } | |
727 | ||
728 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
32927393 | 729 | int write, void *buffer, |
4f2fec00 LR |
730 | size_t *lenp, loff_t *ppos, |
731 | int (*conv)(unsigned long *lvalp, | |
732 | unsigned int *valp, | |
733 | int write, void *data), | |
734 | void *data) | |
735 | { | |
736 | unsigned int *i, vleft; | |
737 | ||
738 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
739 | *lenp = 0; | |
740 | return 0; | |
741 | } | |
742 | ||
743 | i = (unsigned int *) tbl_data; | |
744 | vleft = table->maxlen / sizeof(*i); | |
745 | ||
746 | /* | |
747 | * Arrays are not supported, keep this simple. *Do not* add | |
748 | * support for them. | |
749 | */ | |
750 | if (vleft != 1) { | |
751 | *lenp = 0; | |
752 | return -EINVAL; | |
753 | } | |
754 | ||
755 | if (!conv) | |
756 | conv = do_proc_douintvec_conv; | |
757 | ||
758 | if (write) | |
759 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
760 | conv, data); | |
761 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
762 | } | |
763 | ||
1998f193 LC |
764 | int do_proc_douintvec(struct ctl_table *table, int write, |
765 | void *buffer, size_t *lenp, loff_t *ppos, | |
766 | int (*conv)(unsigned long *lvalp, | |
767 | unsigned int *valp, | |
768 | int write, void *data), | |
769 | void *data) | |
4f2fec00 LR |
770 | { |
771 | return __do_proc_douintvec(table->data, table, write, | |
772 | buffer, lenp, ppos, conv, data); | |
773 | } | |
774 | ||
a2071573 JH |
775 | /** |
776 | * proc_dobool - read/write a bool | |
777 | * @table: the sysctl table | |
778 | * @write: %TRUE if this is a write to the sysctl file | |
779 | * @buffer: the user buffer | |
780 | * @lenp: the size of the user buffer | |
781 | * @ppos: file position | |
782 | * | |
783 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
784 | * values from/to the user buffer, treated as an ASCII string. | |
785 | * | |
786 | * Returns 0 on success. | |
787 | */ | |
788 | int proc_dobool(struct ctl_table *table, int write, void *buffer, | |
789 | size_t *lenp, loff_t *ppos) | |
790 | { | |
791 | return do_proc_dointvec(table, write, buffer, lenp, ppos, | |
792 | do_proc_dobool_conv, NULL); | |
793 | } | |
794 | ||
1da177e4 LT |
795 | /** |
796 | * proc_dointvec - read a vector of integers | |
797 | * @table: the sysctl table | |
798 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
799 | * @buffer: the user buffer |
800 | * @lenp: the size of the user buffer | |
801 | * @ppos: file position | |
802 | * | |
803 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
804 | * values from/to the user buffer, treated as an ASCII string. | |
805 | * | |
806 | * Returns 0 on success. | |
807 | */ | |
32927393 CH |
808 | int proc_dointvec(struct ctl_table *table, int write, void *buffer, |
809 | size_t *lenp, loff_t *ppos) | |
1da177e4 | 810 | { |
e7d316a0 SAK |
811 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
812 | } | |
813 | ||
6923aa0d SAS |
814 | #ifdef CONFIG_COMPACTION |
815 | static int proc_dointvec_minmax_warn_RT_change(struct ctl_table *table, | |
32927393 | 816 | int write, void *buffer, size_t *lenp, loff_t *ppos) |
6923aa0d SAS |
817 | { |
818 | int ret, old; | |
819 | ||
820 | if (!IS_ENABLED(CONFIG_PREEMPT_RT) || !write) | |
821 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
822 | ||
823 | old = *(int *)table->data; | |
824 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
825 | if (ret) | |
826 | return ret; | |
827 | if (old != *(int *)table->data) | |
828 | pr_warn_once("sysctl attribute %s changed by %s[%d]\n", | |
829 | table->procname, current->comm, | |
830 | task_pid_nr(current)); | |
831 | return ret; | |
832 | } | |
833 | #endif | |
834 | ||
e7d316a0 SAK |
835 | /** |
836 | * proc_douintvec - read a vector of unsigned integers | |
837 | * @table: the sysctl table | |
838 | * @write: %TRUE if this is a write to the sysctl file | |
839 | * @buffer: the user buffer | |
840 | * @lenp: the size of the user buffer | |
841 | * @ppos: file position | |
842 | * | |
843 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
844 | * values from/to the user buffer, treated as an ASCII string. | |
845 | * | |
846 | * Returns 0 on success. | |
847 | */ | |
32927393 CH |
848 | int proc_douintvec(struct ctl_table *table, int write, void *buffer, |
849 | size_t *lenp, loff_t *ppos) | |
e7d316a0 | 850 | { |
4f2fec00 LR |
851 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
852 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
853 | } |
854 | ||
34f5a398 | 855 | /* |
25ddbb18 AK |
856 | * Taint values can only be increased |
857 | * This means we can safely use a temporary. | |
34f5a398 | 858 | */ |
8d65af78 | 859 | static int proc_taint(struct ctl_table *table, int write, |
32927393 | 860 | void *buffer, size_t *lenp, loff_t *ppos) |
34f5a398 | 861 | { |
25ddbb18 AK |
862 | struct ctl_table t; |
863 | unsigned long tmptaint = get_taint(); | |
864 | int err; | |
34f5a398 | 865 | |
91fcd412 | 866 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
867 | return -EPERM; |
868 | ||
25ddbb18 AK |
869 | t = *table; |
870 | t.data = &tmptaint; | |
8d65af78 | 871 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
872 | if (err < 0) |
873 | return err; | |
874 | ||
875 | if (write) { | |
db38d5c1 RA |
876 | int i; |
877 | ||
878 | /* | |
879 | * If we are relying on panic_on_taint not producing | |
880 | * false positives due to userspace input, bail out | |
881 | * before setting the requested taint flags. | |
882 | */ | |
883 | if (panic_on_taint_nousertaint && (tmptaint & panic_on_taint)) | |
884 | return -EINVAL; | |
885 | ||
25ddbb18 AK |
886 | /* |
887 | * Poor man's atomic or. Not worth adding a primitive | |
888 | * to everyone's atomic.h for this | |
889 | */ | |
e77132e7 RA |
890 | for (i = 0; i < TAINT_FLAGS_COUNT; i++) |
891 | if ((1UL << i) & tmptaint) | |
373d4d09 | 892 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
893 | } |
894 | ||
895 | return err; | |
34f5a398 TT |
896 | } |
897 | ||
24704f36 WL |
898 | /** |
899 | * struct do_proc_dointvec_minmax_conv_param - proc_dointvec_minmax() range checking structure | |
900 | * @min: pointer to minimum allowable value | |
901 | * @max: pointer to maximum allowable value | |
902 | * | |
903 | * The do_proc_dointvec_minmax_conv_param structure provides the | |
904 | * minimum and maximum values for doing range checking for those sysctl | |
905 | * parameters that use the proc_dointvec_minmax() handler. | |
906 | */ | |
1da177e4 LT |
907 | struct do_proc_dointvec_minmax_conv_param { |
908 | int *min; | |
909 | int *max; | |
910 | }; | |
911 | ||
00b7c339 AW |
912 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
913 | int *valp, | |
1da177e4 LT |
914 | int write, void *data) |
915 | { | |
2bc4fc60 | 916 | int tmp, ret; |
1da177e4 | 917 | struct do_proc_dointvec_minmax_conv_param *param = data; |
2bc4fc60 ZW |
918 | /* |
919 | * If writing, first do so via a temporary local int so we can | |
920 | * bounds-check it before touching *valp. | |
921 | */ | |
922 | int *ip = write ? &tmp : valp; | |
923 | ||
924 | ret = do_proc_dointvec_conv(negp, lvalp, ip, write, data); | |
925 | if (ret) | |
926 | return ret; | |
927 | ||
1da177e4 | 928 | if (write) { |
2bc4fc60 ZW |
929 | if ((param->min && *param->min > tmp) || |
930 | (param->max && *param->max < tmp)) | |
1da177e4 | 931 | return -EINVAL; |
2bc4fc60 | 932 | *valp = tmp; |
1da177e4 | 933 | } |
2bc4fc60 | 934 | |
1da177e4 LT |
935 | return 0; |
936 | } | |
937 | ||
938 | /** | |
939 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
940 | * @table: the sysctl table | |
941 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
942 | * @buffer: the user buffer |
943 | * @lenp: the size of the user buffer | |
944 | * @ppos: file position | |
945 | * | |
946 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
947 | * values from/to the user buffer, treated as an ASCII string. | |
948 | * | |
949 | * This routine will ensure the values are within the range specified by | |
950 | * table->extra1 (min) and table->extra2 (max). | |
951 | * | |
24704f36 | 952 | * Returns 0 on success or -EINVAL on write when the range check fails. |
1da177e4 | 953 | */ |
8d65af78 | 954 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
32927393 | 955 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
956 | { |
957 | struct do_proc_dointvec_minmax_conv_param param = { | |
958 | .min = (int *) table->extra1, | |
959 | .max = (int *) table->extra2, | |
960 | }; | |
8d65af78 | 961 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
962 | do_proc_dointvec_minmax_conv, ¶m); |
963 | } | |
964 | ||
24704f36 WL |
965 | /** |
966 | * struct do_proc_douintvec_minmax_conv_param - proc_douintvec_minmax() range checking structure | |
967 | * @min: pointer to minimum allowable value | |
968 | * @max: pointer to maximum allowable value | |
969 | * | |
970 | * The do_proc_douintvec_minmax_conv_param structure provides the | |
971 | * minimum and maximum values for doing range checking for those sysctl | |
972 | * parameters that use the proc_douintvec_minmax() handler. | |
973 | */ | |
61d9b56a LR |
974 | struct do_proc_douintvec_minmax_conv_param { |
975 | unsigned int *min; | |
976 | unsigned int *max; | |
977 | }; | |
978 | ||
979 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
980 | unsigned int *valp, | |
981 | int write, void *data) | |
982 | { | |
2bc4fc60 ZW |
983 | int ret; |
984 | unsigned int tmp; | |
61d9b56a | 985 | struct do_proc_douintvec_minmax_conv_param *param = data; |
2bc4fc60 ZW |
986 | /* write via temporary local uint for bounds-checking */ |
987 | unsigned int *up = write ? &tmp : valp; | |
61d9b56a | 988 | |
2bc4fc60 ZW |
989 | ret = do_proc_douintvec_conv(lvalp, up, write, data); |
990 | if (ret) | |
991 | return ret; | |
fb910c42 | 992 | |
2bc4fc60 ZW |
993 | if (write) { |
994 | if ((param->min && *param->min > tmp) || | |
995 | (param->max && *param->max < tmp)) | |
61d9b56a LR |
996 | return -ERANGE; |
997 | ||
2bc4fc60 | 998 | *valp = tmp; |
61d9b56a LR |
999 | } |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | /** | |
1005 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
1006 | * @table: the sysctl table | |
1007 | * @write: %TRUE if this is a write to the sysctl file | |
1008 | * @buffer: the user buffer | |
1009 | * @lenp: the size of the user buffer | |
1010 | * @ppos: file position | |
1011 | * | |
1012 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
1013 | * values from/to the user buffer, treated as an ASCII string. Negative | |
1014 | * strings are not allowed. | |
1015 | * | |
1016 | * This routine will ensure the values are within the range specified by | |
1017 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
1018 | * check for UINT_MAX to avoid having to support wrap around uses from | |
1019 | * userspace. | |
1020 | * | |
24704f36 | 1021 | * Returns 0 on success or -ERANGE on write when the range check fails. |
61d9b56a LR |
1022 | */ |
1023 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
32927393 | 1024 | void *buffer, size_t *lenp, loff_t *ppos) |
61d9b56a LR |
1025 | { |
1026 | struct do_proc_douintvec_minmax_conv_param param = { | |
1027 | .min = (unsigned int *) table->extra1, | |
1028 | .max = (unsigned int *) table->extra2, | |
1029 | }; | |
1030 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
1031 | do_proc_douintvec_minmax_conv, ¶m); | |
1032 | } | |
1033 | ||
cb944413 ED |
1034 | /** |
1035 | * proc_dou8vec_minmax - read a vector of unsigned chars with min/max values | |
1036 | * @table: the sysctl table | |
1037 | * @write: %TRUE if this is a write to the sysctl file | |
1038 | * @buffer: the user buffer | |
1039 | * @lenp: the size of the user buffer | |
1040 | * @ppos: file position | |
1041 | * | |
1042 | * Reads/writes up to table->maxlen/sizeof(u8) unsigned chars | |
1043 | * values from/to the user buffer, treated as an ASCII string. Negative | |
1044 | * strings are not allowed. | |
1045 | * | |
1046 | * This routine will ensure the values are within the range specified by | |
1047 | * table->extra1 (min) and table->extra2 (max). | |
1048 | * | |
1049 | * Returns 0 on success or an error on write when the range check fails. | |
1050 | */ | |
1051 | int proc_dou8vec_minmax(struct ctl_table *table, int write, | |
1052 | void *buffer, size_t *lenp, loff_t *ppos) | |
1053 | { | |
1054 | struct ctl_table tmp; | |
1055 | unsigned int min = 0, max = 255U, val; | |
1056 | u8 *data = table->data; | |
1057 | struct do_proc_douintvec_minmax_conv_param param = { | |
1058 | .min = &min, | |
1059 | .max = &max, | |
1060 | }; | |
1061 | int res; | |
1062 | ||
1063 | /* Do not support arrays yet. */ | |
1064 | if (table->maxlen != sizeof(u8)) | |
1065 | return -EINVAL; | |
1066 | ||
1067 | if (table->extra1) { | |
1068 | min = *(unsigned int *) table->extra1; | |
1069 | if (min > 255U) | |
1070 | return -EINVAL; | |
1071 | } | |
1072 | if (table->extra2) { | |
1073 | max = *(unsigned int *) table->extra2; | |
1074 | if (max > 255U) | |
1075 | return -EINVAL; | |
1076 | } | |
1077 | ||
1078 | tmp = *table; | |
1079 | ||
1080 | tmp.maxlen = sizeof(val); | |
1081 | tmp.data = &val; | |
1082 | val = *data; | |
1083 | res = do_proc_douintvec(&tmp, write, buffer, lenp, ppos, | |
1084 | do_proc_douintvec_minmax_conv, ¶m); | |
1085 | if (res) | |
1086 | return res; | |
1087 | if (write) | |
1088 | *data = val; | |
1089 | return 0; | |
1090 | } | |
1091 | EXPORT_SYMBOL_GPL(proc_dou8vec_minmax); | |
1092 | ||
eaee4172 DS |
1093 | #ifdef CONFIG_MAGIC_SYSRQ |
1094 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, | |
32927393 | 1095 | void *buffer, size_t *lenp, loff_t *ppos) |
eaee4172 DS |
1096 | { |
1097 | int tmp, ret; | |
1098 | ||
1099 | tmp = sysrq_mask(); | |
1100 | ||
1101 | ret = __do_proc_dointvec(&tmp, table, write, buffer, | |
1102 | lenp, ppos, NULL, NULL); | |
1103 | if (ret || !write) | |
1104 | return ret; | |
1105 | ||
1106 | if (write) | |
1107 | sysrq_toggle_support(tmp); | |
1108 | ||
1109 | return 0; | |
1110 | } | |
1111 | #endif | |
1112 | ||
32927393 CH |
1113 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, |
1114 | int write, void *buffer, size_t *lenp, loff_t *ppos, | |
1115 | unsigned long convmul, unsigned long convdiv) | |
1da177e4 | 1116 | { |
00b7c339 AW |
1117 | unsigned long *i, *min, *max; |
1118 | int vleft, first = 1, err = 0; | |
00b7c339 | 1119 | size_t left; |
32927393 | 1120 | char *p; |
00b7c339 AW |
1121 | |
1122 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
1123 | *lenp = 0; |
1124 | return 0; | |
1125 | } | |
00b7c339 | 1126 | |
fcfbd547 | 1127 | i = (unsigned long *) data; |
1da177e4 LT |
1128 | min = (unsigned long *) table->extra1; |
1129 | max = (unsigned long *) table->extra2; | |
1130 | vleft = table->maxlen / sizeof(unsigned long); | |
1131 | left = *lenp; | |
00b7c339 AW |
1132 | |
1133 | if (write) { | |
d383d484 LR |
1134 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
1135 | goto out; | |
f4aacea2 | 1136 | |
00b7c339 AW |
1137 | if (left > PAGE_SIZE - 1) |
1138 | left = PAGE_SIZE - 1; | |
32927393 | 1139 | p = buffer; |
00b7c339 AW |
1140 | } |
1141 | ||
27b3d80a | 1142 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
1143 | unsigned long val; |
1144 | ||
1da177e4 | 1145 | if (write) { |
00b7c339 AW |
1146 | bool neg; |
1147 | ||
70f6cbb6 | 1148 | left -= proc_skip_spaces(&p); |
09be1784 CL |
1149 | if (!left) |
1150 | break; | |
00b7c339 | 1151 | |
70f6cbb6 | 1152 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
1153 | proc_wspace_sep, |
1154 | sizeof(proc_wspace_sep), NULL); | |
1622ed7d BL |
1155 | if (err || neg) { |
1156 | err = -EINVAL; | |
1da177e4 | 1157 | break; |
1622ed7d BL |
1158 | } |
1159 | ||
ff9f8a7c | 1160 | val = convmul * val / convdiv; |
e260ad01 CB |
1161 | if ((min && val < *min) || (max && val > *max)) { |
1162 | err = -EINVAL; | |
1163 | break; | |
1164 | } | |
1da177e4 LT |
1165 | *i = val; |
1166 | } else { | |
00b7c339 | 1167 | val = convdiv * (*i) / convmul; |
32927393 CH |
1168 | if (!first) |
1169 | proc_put_char(&buffer, &left, '\t'); | |
1170 | proc_put_long(&buffer, &left, val, false); | |
1da177e4 LT |
1171 | } |
1172 | } | |
1173 | ||
00b7c339 | 1174 | if (!write && !first && left && !err) |
32927393 | 1175 | proc_put_char(&buffer, &left, '\n'); |
00b7c339 | 1176 | if (write && !err) |
70f6cbb6 | 1177 | left -= proc_skip_spaces(&p); |
32927393 CH |
1178 | if (write && first) |
1179 | return err ? : -EINVAL; | |
1da177e4 | 1180 | *lenp -= left; |
f4aacea2 | 1181 | out: |
1da177e4 | 1182 | *ppos += *lenp; |
00b7c339 | 1183 | return err; |
1da177e4 LT |
1184 | } |
1185 | ||
d8217f07 | 1186 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
32927393 CH |
1187 | void *buffer, size_t *lenp, loff_t *ppos, unsigned long convmul, |
1188 | unsigned long convdiv) | |
fcfbd547 KK |
1189 | { |
1190 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 1191 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
1192 | } |
1193 | ||
1da177e4 LT |
1194 | /** |
1195 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
1196 | * @table: the sysctl table | |
1197 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1198 | * @buffer: the user buffer |
1199 | * @lenp: the size of the user buffer | |
1200 | * @ppos: file position | |
1201 | * | |
1202 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
1203 | * values from/to the user buffer, treated as an ASCII string. | |
1204 | * | |
1205 | * This routine will ensure the values are within the range specified by | |
1206 | * table->extra1 (min) and table->extra2 (max). | |
1207 | * | |
1208 | * Returns 0 on success. | |
1209 | */ | |
8d65af78 | 1210 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
32927393 | 1211 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1212 | { |
8d65af78 | 1213 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
1214 | } |
1215 | ||
1216 | /** | |
1217 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
1218 | * @table: the sysctl table | |
1219 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1220 | * @buffer: the user buffer |
1221 | * @lenp: the size of the user buffer | |
1222 | * @ppos: file position | |
1223 | * | |
1224 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
1225 | * values from/to the user buffer, treated as an ASCII string. The values | |
1226 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
1227 | * | |
1228 | * This routine will ensure the values are within the range specified by | |
1229 | * table->extra1 (min) and table->extra2 (max). | |
1230 | * | |
1231 | * Returns 0 on success. | |
1232 | */ | |
d8217f07 | 1233 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
32927393 | 1234 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1235 | { |
8d65af78 | 1236 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
1237 | lenp, ppos, HZ, 1000l); |
1238 | } | |
1239 | ||
1240 | ||
00b7c339 | 1241 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1242 | int *valp, |
1243 | int write, void *data) | |
1244 | { | |
1245 | if (write) { | |
63259457 | 1246 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 1247 | return 1; |
1da177e4 LT |
1248 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
1249 | } else { | |
1250 | int val = *valp; | |
1251 | unsigned long lval; | |
1252 | if (val < 0) { | |
00b7c339 | 1253 | *negp = true; |
9a5bc726 | 1254 | lval = -(unsigned long)val; |
1da177e4 | 1255 | } else { |
00b7c339 | 1256 | *negp = false; |
1da177e4 LT |
1257 | lval = (unsigned long)val; |
1258 | } | |
1259 | *lvalp = lval / HZ; | |
1260 | } | |
1261 | return 0; | |
1262 | } | |
1263 | ||
00b7c339 | 1264 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1265 | int *valp, |
1266 | int write, void *data) | |
1267 | { | |
1268 | if (write) { | |
cba9f33d BS |
1269 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
1270 | return 1; | |
1da177e4 LT |
1271 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
1272 | } else { | |
1273 | int val = *valp; | |
1274 | unsigned long lval; | |
1275 | if (val < 0) { | |
00b7c339 | 1276 | *negp = true; |
9a5bc726 | 1277 | lval = -(unsigned long)val; |
1da177e4 | 1278 | } else { |
00b7c339 | 1279 | *negp = false; |
1da177e4 LT |
1280 | lval = (unsigned long)val; |
1281 | } | |
1282 | *lvalp = jiffies_to_clock_t(lval); | |
1283 | } | |
1284 | return 0; | |
1285 | } | |
1286 | ||
00b7c339 | 1287 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1288 | int *valp, |
1289 | int write, void *data) | |
1290 | { | |
1291 | if (write) { | |
d738ce8f FF |
1292 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
1293 | ||
1294 | if (jif > INT_MAX) | |
1295 | return 1; | |
1296 | *valp = (int)jif; | |
1da177e4 LT |
1297 | } else { |
1298 | int val = *valp; | |
1299 | unsigned long lval; | |
1300 | if (val < 0) { | |
00b7c339 | 1301 | *negp = true; |
9a5bc726 | 1302 | lval = -(unsigned long)val; |
1da177e4 | 1303 | } else { |
00b7c339 | 1304 | *negp = false; |
1da177e4 LT |
1305 | lval = (unsigned long)val; |
1306 | } | |
1307 | *lvalp = jiffies_to_msecs(lval); | |
1308 | } | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | /** | |
1313 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
1314 | * @table: the sysctl table | |
1315 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1316 | * @buffer: the user buffer |
1317 | * @lenp: the size of the user buffer | |
1318 | * @ppos: file position | |
1319 | * | |
1320 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1321 | * values from/to the user buffer, treated as an ASCII string. | |
1322 | * The values read are assumed to be in seconds, and are converted into | |
1323 | * jiffies. | |
1324 | * | |
1325 | * Returns 0 on success. | |
1326 | */ | |
8d65af78 | 1327 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
32927393 | 1328 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1329 | { |
8d65af78 | 1330 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
1331 | do_proc_dointvec_jiffies_conv,NULL); |
1332 | } | |
1333 | ||
1334 | /** | |
1335 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
1336 | * @table: the sysctl table | |
1337 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1338 | * @buffer: the user buffer |
1339 | * @lenp: the size of the user buffer | |
1e5d5331 | 1340 | * @ppos: pointer to the file position |
1da177e4 LT |
1341 | * |
1342 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1343 | * values from/to the user buffer, treated as an ASCII string. | |
1344 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
1345 | * are converted into jiffies. | |
1346 | * | |
1347 | * Returns 0 on success. | |
1348 | */ | |
8d65af78 | 1349 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
32927393 | 1350 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1351 | { |
8d65af78 | 1352 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
1353 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
1354 | } | |
1355 | ||
1356 | /** | |
1357 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
1358 | * @table: the sysctl table | |
1359 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1360 | * @buffer: the user buffer |
1361 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
1362 | * @ppos: file position |
1363 | * @ppos: the current position in the file | |
1da177e4 LT |
1364 | * |
1365 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1366 | * values from/to the user buffer, treated as an ASCII string. | |
1367 | * The values read are assumed to be in 1/1000 seconds, and | |
1368 | * are converted into jiffies. | |
1369 | * | |
1370 | * Returns 0 on success. | |
1371 | */ | |
32927393 CH |
1372 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, void *buffer, |
1373 | size_t *lenp, loff_t *ppos) | |
1da177e4 | 1374 | { |
8d65af78 | 1375 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
1376 | do_proc_dointvec_ms_jiffies_conv, NULL); |
1377 | } | |
1378 | ||
32927393 CH |
1379 | static int proc_do_cad_pid(struct ctl_table *table, int write, void *buffer, |
1380 | size_t *lenp, loff_t *ppos) | |
9ec52099 CLG |
1381 | { |
1382 | struct pid *new_pid; | |
1383 | pid_t tmp; | |
1384 | int r; | |
1385 | ||
6c5f3e7b | 1386 | tmp = pid_vnr(cad_pid); |
9ec52099 | 1387 | |
8d65af78 | 1388 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
1389 | lenp, ppos, NULL, NULL); |
1390 | if (r || !write) | |
1391 | return r; | |
1392 | ||
1393 | new_pid = find_get_pid(tmp); | |
1394 | if (!new_pid) | |
1395 | return -ESRCH; | |
1396 | ||
1397 | put_pid(xchg(&cad_pid, new_pid)); | |
1398 | return 0; | |
1399 | } | |
1400 | ||
9f977fb7 OP |
1401 | /** |
1402 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
1403 | * @table: the sysctl table | |
1404 | * @write: %TRUE if this is a write to the sysctl file | |
1405 | * @buffer: the user buffer | |
1406 | * @lenp: the size of the user buffer | |
1407 | * @ppos: file position | |
1408 | * | |
1409 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
1410 | * in table->maxlen. | |
1411 | * | |
1412 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
1413 | * large bitmaps may be represented in a compact manner. Writing into | |
1414 | * the file will clear the bitmap then update it with the given input. | |
1415 | * | |
1416 | * Returns 0 on success. | |
1417 | */ | |
1418 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
32927393 | 1419 | void *buffer, size_t *lenp, loff_t *ppos) |
9f977fb7 OP |
1420 | { |
1421 | int err = 0; | |
9f977fb7 OP |
1422 | size_t left = *lenp; |
1423 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 1424 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
1425 | unsigned long *tmp_bitmap = NULL; |
1426 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
1427 | ||
122ff243 | 1428 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
1429 | *lenp = 0; |
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | if (write) { | |
32927393 | 1434 | char *p = buffer; |
3116ad38 | 1435 | size_t skipped = 0; |
9f977fb7 | 1436 | |
3116ad38 | 1437 | if (left > PAGE_SIZE - 1) { |
9f977fb7 | 1438 | left = PAGE_SIZE - 1; |
3116ad38 ES |
1439 | /* How much of the buffer we'll skip this pass */ |
1440 | skipped = *lenp - left; | |
1441 | } | |
9f977fb7 | 1442 | |
475dae38 | 1443 | tmp_bitmap = bitmap_zalloc(bitmap_len, GFP_KERNEL); |
32927393 | 1444 | if (!tmp_bitmap) |
9f977fb7 | 1445 | return -ENOMEM; |
70f6cbb6 | 1446 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
1447 | while (!err && left) { |
1448 | unsigned long val_a, val_b; | |
1449 | bool neg; | |
3116ad38 | 1450 | size_t saved_left; |
9f977fb7 | 1451 | |
3116ad38 ES |
1452 | /* In case we stop parsing mid-number, we can reset */ |
1453 | saved_left = left; | |
70f6cbb6 | 1454 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 | 1455 | sizeof(tr_a), &c); |
3116ad38 ES |
1456 | /* |
1457 | * If we consumed the entirety of a truncated buffer or | |
1458 | * only one char is left (may be a "-"), then stop here, | |
1459 | * reset, & come back for more. | |
1460 | */ | |
1461 | if ((left <= 1) && skipped) { | |
1462 | left = saved_left; | |
1463 | break; | |
1464 | } | |
1465 | ||
9f977fb7 OP |
1466 | if (err) |
1467 | break; | |
1468 | if (val_a >= bitmap_len || neg) { | |
1469 | err = -EINVAL; | |
1470 | break; | |
1471 | } | |
1472 | ||
1473 | val_b = val_a; | |
1474 | if (left) { | |
70f6cbb6 | 1475 | p++; |
9f977fb7 OP |
1476 | left--; |
1477 | } | |
1478 | ||
1479 | if (c == '-') { | |
70f6cbb6 | 1480 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
1481 | &neg, tr_b, sizeof(tr_b), |
1482 | &c); | |
3116ad38 ES |
1483 | /* |
1484 | * If we consumed all of a truncated buffer or | |
1485 | * then stop here, reset, & come back for more. | |
1486 | */ | |
1487 | if (!left && skipped) { | |
1488 | left = saved_left; | |
1489 | break; | |
1490 | } | |
1491 | ||
9f977fb7 OP |
1492 | if (err) |
1493 | break; | |
1494 | if (val_b >= bitmap_len || neg || | |
1495 | val_a > val_b) { | |
1496 | err = -EINVAL; | |
1497 | break; | |
1498 | } | |
1499 | if (left) { | |
70f6cbb6 | 1500 | p++; |
9f977fb7 OP |
1501 | left--; |
1502 | } | |
1503 | } | |
1504 | ||
5a04cca6 | 1505 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
70f6cbb6 | 1506 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 1507 | } |
3116ad38 | 1508 | left += skipped; |
9f977fb7 OP |
1509 | } else { |
1510 | unsigned long bit_a, bit_b = 0; | |
9a52c5f3 | 1511 | bool first = 1; |
9f977fb7 OP |
1512 | |
1513 | while (left) { | |
1514 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
1515 | if (bit_a >= bitmap_len) | |
1516 | break; | |
1517 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
1518 | bit_a + 1) - 1; | |
1519 | ||
32927393 CH |
1520 | if (!first) |
1521 | proc_put_char(&buffer, &left, ','); | |
1522 | proc_put_long(&buffer, &left, bit_a, false); | |
9f977fb7 | 1523 | if (bit_a != bit_b) { |
32927393 CH |
1524 | proc_put_char(&buffer, &left, '-'); |
1525 | proc_put_long(&buffer, &left, bit_b, false); | |
9f977fb7 OP |
1526 | } |
1527 | ||
1528 | first = 0; bit_b++; | |
1529 | } | |
32927393 | 1530 | proc_put_char(&buffer, &left, '\n'); |
9f977fb7 OP |
1531 | } |
1532 | ||
1533 | if (!err) { | |
1534 | if (write) { | |
1535 | if (*ppos) | |
1536 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
1537 | else | |
5a04cca6 | 1538 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 | 1539 | } |
9f977fb7 OP |
1540 | *lenp -= left; |
1541 | *ppos += *lenp; | |
9f977fb7 | 1542 | } |
f9eb2fdd | 1543 | |
475dae38 | 1544 | bitmap_free(tmp_bitmap); |
f9eb2fdd | 1545 | return err; |
9f977fb7 OP |
1546 | } |
1547 | ||
55610500 | 1548 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 1549 | |
8d65af78 | 1550 | int proc_dostring(struct ctl_table *table, int write, |
32927393 | 1551 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1552 | { |
1553 | return -ENOSYS; | |
1554 | } | |
1555 | ||
a2071573 JH |
1556 | int proc_dobool(struct ctl_table *table, int write, |
1557 | void *buffer, size_t *lenp, loff_t *ppos) | |
1558 | { | |
1559 | return -ENOSYS; | |
1560 | } | |
1561 | ||
f461d2dc | 1562 | int proc_dointvec(struct ctl_table *table, int write, |
32927393 | 1563 | void *buffer, size_t *lenp, loff_t *ppos) |
f461d2dc CH |
1564 | { |
1565 | return -ENOSYS; | |
1566 | } | |
1567 | ||
1568 | int proc_douintvec(struct ctl_table *table, int write, | |
32927393 | 1569 | void *buffer, size_t *lenp, loff_t *ppos) |
f461d2dc CH |
1570 | { |
1571 | return -ENOSYS; | |
1572 | } | |
1573 | ||
1574 | int proc_dointvec_minmax(struct ctl_table *table, int write, | |
32927393 | 1575 | void *buffer, size_t *lenp, loff_t *ppos) |
f461d2dc CH |
1576 | { |
1577 | return -ENOSYS; | |
1578 | } | |
1579 | ||
1580 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
32927393 | 1581 | void *buffer, size_t *lenp, loff_t *ppos) |
f461d2dc CH |
1582 | { |
1583 | return -ENOSYS; | |
9f977fb7 OP |
1584 | } |
1585 | ||
cb944413 ED |
1586 | int proc_dou8vec_minmax(struct ctl_table *table, int write, |
1587 | void *buffer, size_t *lenp, loff_t *ppos) | |
1588 | { | |
1589 | return -ENOSYS; | |
1590 | } | |
1591 | ||
f461d2dc | 1592 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
32927393 | 1593 | void *buffer, size_t *lenp, loff_t *ppos) |
f461d2dc CH |
1594 | { |
1595 | return -ENOSYS; | |
1596 | } | |
1da177e4 | 1597 | |
f461d2dc | 1598 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
32927393 | 1599 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1600 | { |
1601 | return -ENOSYS; | |
1602 | } | |
1603 | ||
f461d2dc | 1604 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
32927393 | 1605 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1606 | { |
1607 | return -ENOSYS; | |
1608 | } | |
1609 | ||
f461d2dc | 1610 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
32927393 | 1611 | void *buffer, size_t *lenp, loff_t *ppos) |
e7d316a0 SAK |
1612 | { |
1613 | return -ENOSYS; | |
1614 | } | |
1615 | ||
f461d2dc | 1616 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
32927393 | 1617 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1618 | { |
32927393 | 1619 | return -ENOSYS; |
1da177e4 LT |
1620 | } |
1621 | ||
f461d2dc | 1622 | int proc_do_large_bitmap(struct ctl_table *table, int write, |
32927393 | 1623 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1624 | { |
1625 | return -ENOSYS; | |
1626 | } | |
1627 | ||
f461d2dc CH |
1628 | #endif /* CONFIG_PROC_SYSCTL */ |
1629 | ||
1630 | #if defined(CONFIG_SYSCTL) | |
1631 | int proc_do_static_key(struct ctl_table *table, int write, | |
32927393 | 1632 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1633 | { |
f461d2dc CH |
1634 | struct static_key *key = (struct static_key *)table->data; |
1635 | static DEFINE_MUTEX(static_key_mutex); | |
1636 | int val, ret; | |
1637 | struct ctl_table tmp = { | |
1638 | .data = &val, | |
1639 | .maxlen = sizeof(val), | |
1640 | .mode = table->mode, | |
1641 | .extra1 = SYSCTL_ZERO, | |
1642 | .extra2 = SYSCTL_ONE, | |
1643 | }; | |
1644 | ||
1645 | if (write && !capable(CAP_SYS_ADMIN)) | |
1646 | return -EPERM; | |
1647 | ||
1648 | mutex_lock(&static_key_mutex); | |
1649 | val = static_key_enabled(key); | |
1650 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
1651 | if (write && !ret) { | |
1652 | if (val) | |
1653 | static_key_enable(key); | |
1654 | else | |
1655 | static_key_disable(key); | |
1656 | } | |
1657 | mutex_unlock(&static_key_mutex); | |
1658 | return ret; | |
1da177e4 LT |
1659 | } |
1660 | ||
f461d2dc CH |
1661 | static struct ctl_table kern_table[] = { |
1662 | { | |
1663 | .procname = "sched_child_runs_first", | |
1664 | .data = &sysctl_sched_child_runs_first, | |
1665 | .maxlen = sizeof(unsigned int), | |
1666 | .mode = 0644, | |
1667 | .proc_handler = proc_dointvec, | |
1668 | }, | |
1d1c2509 PZ |
1669 | #ifdef CONFIG_SCHEDSTATS |
1670 | { | |
1671 | .procname = "sched_schedstats", | |
1672 | .data = NULL, | |
1673 | .maxlen = sizeof(unsigned int), | |
1674 | .mode = 0644, | |
1675 | .proc_handler = sysctl_schedstats, | |
1676 | .extra1 = SYSCTL_ZERO, | |
1677 | .extra2 = SYSCTL_ONE, | |
1678 | }, | |
1679 | #endif /* CONFIG_SCHEDSTATS */ | |
0cd7c741 PZ |
1680 | #ifdef CONFIG_TASK_DELAY_ACCT |
1681 | { | |
1682 | .procname = "task_delayacct", | |
1683 | .data = NULL, | |
1684 | .maxlen = sizeof(unsigned int), | |
1685 | .mode = 0644, | |
1686 | .proc_handler = sysctl_delayacct, | |
1687 | .extra1 = SYSCTL_ZERO, | |
1688 | .extra2 = SYSCTL_ONE, | |
1689 | }, | |
1690 | #endif /* CONFIG_TASK_DELAY_ACCT */ | |
b7cc6ec7 | 1691 | #ifdef CONFIG_NUMA_BALANCING |
f461d2dc CH |
1692 | { |
1693 | .procname = "numa_balancing", | |
1694 | .data = NULL, /* filled in by handler */ | |
1695 | .maxlen = sizeof(unsigned int), | |
1696 | .mode = 0644, | |
1697 | .proc_handler = sysctl_numa_balancing, | |
1698 | .extra1 = SYSCTL_ZERO, | |
c574bbe9 | 1699 | .extra2 = SYSCTL_FOUR, |
f461d2dc CH |
1700 | }, |
1701 | #endif /* CONFIG_NUMA_BALANCING */ | |
f461d2dc CH |
1702 | { |
1703 | .procname = "sched_rt_period_us", | |
1704 | .data = &sysctl_sched_rt_period, | |
1705 | .maxlen = sizeof(unsigned int), | |
1706 | .mode = 0644, | |
1707 | .proc_handler = sched_rt_handler, | |
1708 | }, | |
1709 | { | |
1710 | .procname = "sched_rt_runtime_us", | |
1711 | .data = &sysctl_sched_rt_runtime, | |
1712 | .maxlen = sizeof(int), | |
1713 | .mode = 0644, | |
1714 | .proc_handler = sched_rt_handler, | |
1715 | }, | |
b4098bfc PZ |
1716 | { |
1717 | .procname = "sched_deadline_period_max_us", | |
1718 | .data = &sysctl_sched_dl_period_max, | |
1719 | .maxlen = sizeof(unsigned int), | |
1720 | .mode = 0644, | |
1721 | .proc_handler = proc_dointvec, | |
1722 | }, | |
1723 | { | |
1724 | .procname = "sched_deadline_period_min_us", | |
1725 | .data = &sysctl_sched_dl_period_min, | |
1726 | .maxlen = sizeof(unsigned int), | |
1727 | .mode = 0644, | |
1728 | .proc_handler = proc_dointvec, | |
1729 | }, | |
f461d2dc CH |
1730 | { |
1731 | .procname = "sched_rr_timeslice_ms", | |
1732 | .data = &sysctl_sched_rr_timeslice, | |
1733 | .maxlen = sizeof(int), | |
1734 | .mode = 0644, | |
1735 | .proc_handler = sched_rr_handler, | |
1736 | }, | |
1737 | #ifdef CONFIG_UCLAMP_TASK | |
1738 | { | |
1739 | .procname = "sched_util_clamp_min", | |
1740 | .data = &sysctl_sched_uclamp_util_min, | |
1741 | .maxlen = sizeof(unsigned int), | |
1742 | .mode = 0644, | |
1743 | .proc_handler = sysctl_sched_uclamp_handler, | |
1744 | }, | |
1745 | { | |
1746 | .procname = "sched_util_clamp_max", | |
1747 | .data = &sysctl_sched_uclamp_util_max, | |
1748 | .maxlen = sizeof(unsigned int), | |
1749 | .mode = 0644, | |
1750 | .proc_handler = sysctl_sched_uclamp_handler, | |
1751 | }, | |
13685c4a QY |
1752 | { |
1753 | .procname = "sched_util_clamp_min_rt_default", | |
1754 | .data = &sysctl_sched_uclamp_util_min_rt_default, | |
1755 | .maxlen = sizeof(unsigned int), | |
1756 | .mode = 0644, | |
1757 | .proc_handler = sysctl_sched_uclamp_handler, | |
1758 | }, | |
f461d2dc | 1759 | #endif |
f461d2dc CH |
1760 | #ifdef CONFIG_CFS_BANDWIDTH |
1761 | { | |
1762 | .procname = "sched_cfs_bandwidth_slice_us", | |
1763 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
1764 | .maxlen = sizeof(unsigned int), | |
1765 | .mode = 0644, | |
1766 | .proc_handler = proc_dointvec_minmax, | |
1767 | .extra1 = SYSCTL_ONE, | |
1768 | }, | |
1769 | #endif | |
1770 | #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) | |
1771 | { | |
1772 | .procname = "sched_energy_aware", | |
1773 | .data = &sysctl_sched_energy_aware, | |
1774 | .maxlen = sizeof(unsigned int), | |
1775 | .mode = 0644, | |
1776 | .proc_handler = sched_energy_aware_handler, | |
1777 | .extra1 = SYSCTL_ZERO, | |
1778 | .extra2 = SYSCTL_ONE, | |
1779 | }, | |
1780 | #endif | |
1781 | #ifdef CONFIG_PROVE_LOCKING | |
1782 | { | |
1783 | .procname = "prove_locking", | |
1784 | .data = &prove_locking, | |
1785 | .maxlen = sizeof(int), | |
1786 | .mode = 0644, | |
1787 | .proc_handler = proc_dointvec, | |
1788 | }, | |
1789 | #endif | |
1790 | #ifdef CONFIG_LOCK_STAT | |
1791 | { | |
1792 | .procname = "lock_stat", | |
1793 | .data = &lock_stat, | |
1794 | .maxlen = sizeof(int), | |
1795 | .mode = 0644, | |
1796 | .proc_handler = proc_dointvec, | |
1797 | }, | |
1798 | #endif | |
1799 | { | |
1800 | .procname = "panic", | |
1801 | .data = &panic_timeout, | |
1802 | .maxlen = sizeof(int), | |
1803 | .mode = 0644, | |
1804 | .proc_handler = proc_dointvec, | |
1805 | }, | |
f461d2dc CH |
1806 | #ifdef CONFIG_PROC_SYSCTL |
1807 | { | |
1808 | .procname = "tainted", | |
1809 | .maxlen = sizeof(long), | |
1810 | .mode = 0644, | |
1811 | .proc_handler = proc_taint, | |
1812 | }, | |
1813 | { | |
1814 | .procname = "sysctl_writes_strict", | |
1815 | .data = &sysctl_writes_strict, | |
1816 | .maxlen = sizeof(int), | |
1817 | .mode = 0644, | |
1818 | .proc_handler = proc_dointvec_minmax, | |
78e36f3b | 1819 | .extra1 = SYSCTL_NEG_ONE, |
f461d2dc CH |
1820 | .extra2 = SYSCTL_ONE, |
1821 | }, | |
1822 | #endif | |
1823 | #ifdef CONFIG_LATENCYTOP | |
1824 | { | |
1825 | .procname = "latencytop", | |
1826 | .data = &latencytop_enabled, | |
1827 | .maxlen = sizeof(int), | |
1828 | .mode = 0644, | |
1829 | .proc_handler = sysctl_latencytop, | |
1830 | }, | |
1831 | #endif | |
1832 | #ifdef CONFIG_BLK_DEV_INITRD | |
1833 | { | |
1834 | .procname = "real-root-dev", | |
1835 | .data = &real_root_dev, | |
1836 | .maxlen = sizeof(int), | |
1837 | .mode = 0644, | |
1838 | .proc_handler = proc_dointvec, | |
1839 | }, | |
1840 | #endif | |
1841 | { | |
1842 | .procname = "print-fatal-signals", | |
1843 | .data = &print_fatal_signals, | |
1844 | .maxlen = sizeof(int), | |
1845 | .mode = 0644, | |
1846 | .proc_handler = proc_dointvec, | |
1847 | }, | |
1848 | #ifdef CONFIG_SPARC | |
1849 | { | |
1850 | .procname = "reboot-cmd", | |
1851 | .data = reboot_command, | |
1852 | .maxlen = 256, | |
1853 | .mode = 0644, | |
1854 | .proc_handler = proc_dostring, | |
1855 | }, | |
1856 | { | |
1857 | .procname = "stop-a", | |
1858 | .data = &stop_a_enabled, | |
1859 | .maxlen = sizeof (int), | |
1860 | .mode = 0644, | |
1861 | .proc_handler = proc_dointvec, | |
1862 | }, | |
1863 | { | |
1864 | .procname = "scons-poweroff", | |
1865 | .data = &scons_pwroff, | |
1866 | .maxlen = sizeof (int), | |
1867 | .mode = 0644, | |
1868 | .proc_handler = proc_dointvec, | |
1869 | }, | |
1870 | #endif | |
1871 | #ifdef CONFIG_SPARC64 | |
1872 | { | |
1873 | .procname = "tsb-ratio", | |
1874 | .data = &sysctl_tsb_ratio, | |
1875 | .maxlen = sizeof (int), | |
1876 | .mode = 0644, | |
1877 | .proc_handler = proc_dointvec, | |
1878 | }, | |
1879 | #endif | |
1880 | #ifdef CONFIG_PARISC | |
1881 | { | |
1882 | .procname = "soft-power", | |
1883 | .data = &pwrsw_enabled, | |
1884 | .maxlen = sizeof (int), | |
1885 | .mode = 0644, | |
1886 | .proc_handler = proc_dointvec, | |
1887 | }, | |
1888 | #endif | |
1889 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1890 | { | |
1891 | .procname = "unaligned-trap", | |
1892 | .data = &unaligned_enabled, | |
1893 | .maxlen = sizeof (int), | |
1894 | .mode = 0644, | |
1895 | .proc_handler = proc_dointvec, | |
1896 | }, | |
1897 | #endif | |
1898 | { | |
1899 | .procname = "ctrl-alt-del", | |
1900 | .data = &C_A_D, | |
1901 | .maxlen = sizeof(int), | |
1902 | .mode = 0644, | |
1903 | .proc_handler = proc_dointvec, | |
1904 | }, | |
1905 | #ifdef CONFIG_FUNCTION_TRACER | |
1906 | { | |
1907 | .procname = "ftrace_enabled", | |
1908 | .data = &ftrace_enabled, | |
1909 | .maxlen = sizeof(int), | |
1910 | .mode = 0644, | |
1911 | .proc_handler = ftrace_enable_sysctl, | |
1912 | }, | |
1913 | #endif | |
1914 | #ifdef CONFIG_STACK_TRACER | |
1915 | { | |
1916 | .procname = "stack_tracer_enabled", | |
1917 | .data = &stack_tracer_enabled, | |
1918 | .maxlen = sizeof(int), | |
1919 | .mode = 0644, | |
1920 | .proc_handler = stack_trace_sysctl, | |
1921 | }, | |
1922 | #endif | |
1923 | #ifdef CONFIG_TRACING | |
1924 | { | |
1925 | .procname = "ftrace_dump_on_oops", | |
1926 | .data = &ftrace_dump_on_oops, | |
1927 | .maxlen = sizeof(int), | |
1928 | .mode = 0644, | |
1929 | .proc_handler = proc_dointvec, | |
1930 | }, | |
1931 | { | |
1932 | .procname = "traceoff_on_warning", | |
1933 | .data = &__disable_trace_on_warning, | |
1934 | .maxlen = sizeof(__disable_trace_on_warning), | |
1935 | .mode = 0644, | |
1936 | .proc_handler = proc_dointvec, | |
1937 | }, | |
1938 | { | |
1939 | .procname = "tracepoint_printk", | |
1940 | .data = &tracepoint_printk, | |
1941 | .maxlen = sizeof(tracepoint_printk), | |
1942 | .mode = 0644, | |
1943 | .proc_handler = tracepoint_printk_sysctl, | |
1944 | }, | |
1945 | #endif | |
1946 | #ifdef CONFIG_KEXEC_CORE | |
1947 | { | |
1948 | .procname = "kexec_load_disabled", | |
1949 | .data = &kexec_load_disabled, | |
1950 | .maxlen = sizeof(int), | |
1951 | .mode = 0644, | |
1952 | /* only handle a transition from default "0" to "1" */ | |
1953 | .proc_handler = proc_dointvec_minmax, | |
1954 | .extra1 = SYSCTL_ONE, | |
1955 | .extra2 = SYSCTL_ONE, | |
1956 | }, | |
1957 | #endif | |
1958 | #ifdef CONFIG_MODULES | |
1959 | { | |
1960 | .procname = "modprobe", | |
1961 | .data = &modprobe_path, | |
1962 | .maxlen = KMOD_PATH_LEN, | |
1963 | .mode = 0644, | |
1964 | .proc_handler = proc_dostring, | |
1965 | }, | |
1966 | { | |
1967 | .procname = "modules_disabled", | |
1968 | .data = &modules_disabled, | |
1969 | .maxlen = sizeof(int), | |
1970 | .mode = 0644, | |
1971 | /* only handle a transition from default "0" to "1" */ | |
1972 | .proc_handler = proc_dointvec_minmax, | |
1973 | .extra1 = SYSCTL_ONE, | |
1974 | .extra2 = SYSCTL_ONE, | |
1975 | }, | |
1976 | #endif | |
1977 | #ifdef CONFIG_UEVENT_HELPER | |
1978 | { | |
1979 | .procname = "hotplug", | |
1980 | .data = &uevent_helper, | |
1981 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1982 | .mode = 0644, | |
1983 | .proc_handler = proc_dostring, | |
1984 | }, | |
1985 | #endif | |
f461d2dc CH |
1986 | #ifdef CONFIG_BSD_PROCESS_ACCT |
1987 | { | |
1988 | .procname = "acct", | |
1989 | .data = &acct_parm, | |
1990 | .maxlen = 3*sizeof(int), | |
1991 | .mode = 0644, | |
1992 | .proc_handler = proc_dointvec, | |
1993 | }, | |
1994 | #endif | |
1995 | #ifdef CONFIG_MAGIC_SYSRQ | |
1996 | { | |
1997 | .procname = "sysrq", | |
1998 | .data = NULL, | |
1999 | .maxlen = sizeof (int), | |
2000 | .mode = 0644, | |
2001 | .proc_handler = sysrq_sysctl_handler, | |
2002 | }, | |
2003 | #endif | |
2004 | #ifdef CONFIG_PROC_SYSCTL | |
2005 | { | |
2006 | .procname = "cad_pid", | |
2007 | .data = NULL, | |
2008 | .maxlen = sizeof (int), | |
2009 | .mode = 0600, | |
2010 | .proc_handler = proc_do_cad_pid, | |
2011 | }, | |
2012 | #endif | |
2013 | { | |
2014 | .procname = "threads-max", | |
2015 | .data = NULL, | |
2016 | .maxlen = sizeof(int), | |
2017 | .mode = 0644, | |
2018 | .proc_handler = sysctl_max_threads, | |
2019 | }, | |
f461d2dc CH |
2020 | { |
2021 | .procname = "usermodehelper", | |
2022 | .mode = 0555, | |
2023 | .child = usermodehelper_table, | |
2024 | }, | |
f461d2dc CH |
2025 | { |
2026 | .procname = "overflowuid", | |
2027 | .data = &overflowuid, | |
2028 | .maxlen = sizeof(int), | |
2029 | .mode = 0644, | |
2030 | .proc_handler = proc_dointvec_minmax, | |
2452dcb9 | 2031 | .extra1 = SYSCTL_ZERO, |
54771613 | 2032 | .extra2 = SYSCTL_MAXOLDUID, |
f461d2dc CH |
2033 | }, |
2034 | { | |
2035 | .procname = "overflowgid", | |
2036 | .data = &overflowgid, | |
2037 | .maxlen = sizeof(int), | |
2038 | .mode = 0644, | |
2039 | .proc_handler = proc_dointvec_minmax, | |
2452dcb9 | 2040 | .extra1 = SYSCTL_ZERO, |
54771613 | 2041 | .extra2 = SYSCTL_MAXOLDUID, |
f461d2dc CH |
2042 | }, |
2043 | #ifdef CONFIG_S390 | |
2044 | { | |
2045 | .procname = "userprocess_debug", | |
2046 | .data = &show_unhandled_signals, | |
2047 | .maxlen = sizeof(int), | |
2048 | .mode = 0644, | |
2049 | .proc_handler = proc_dointvec, | |
2050 | }, | |
2051 | #endif | |
60c958d8 GP |
2052 | #ifdef CONFIG_SMP |
2053 | { | |
2054 | .procname = "oops_all_cpu_backtrace", | |
2055 | .data = &sysctl_oops_all_cpu_backtrace, | |
2056 | .maxlen = sizeof(int), | |
2057 | .mode = 0644, | |
2058 | .proc_handler = proc_dointvec_minmax, | |
2059 | .extra1 = SYSCTL_ZERO, | |
2060 | .extra2 = SYSCTL_ONE, | |
2061 | }, | |
2062 | #endif /* CONFIG_SMP */ | |
f461d2dc CH |
2063 | { |
2064 | .procname = "pid_max", | |
2065 | .data = &pid_max, | |
2066 | .maxlen = sizeof (int), | |
2067 | .mode = 0644, | |
2068 | .proc_handler = proc_dointvec_minmax, | |
2069 | .extra1 = &pid_max_min, | |
2070 | .extra2 = &pid_max_max, | |
2071 | }, | |
2072 | { | |
2073 | .procname = "panic_on_oops", | |
2074 | .data = &panic_on_oops, | |
2075 | .maxlen = sizeof(int), | |
2076 | .mode = 0644, | |
2077 | .proc_handler = proc_dointvec, | |
2078 | }, | |
2079 | { | |
2080 | .procname = "panic_print", | |
2081 | .data = &panic_print, | |
2082 | .maxlen = sizeof(unsigned long), | |
2083 | .mode = 0644, | |
2084 | .proc_handler = proc_doulongvec_minmax, | |
2085 | }, | |
f461d2dc CH |
2086 | { |
2087 | .procname = "ngroups_max", | |
f628867d | 2088 | .data = (void *)&ngroups_max, |
f461d2dc CH |
2089 | .maxlen = sizeof (int), |
2090 | .mode = 0444, | |
2091 | .proc_handler = proc_dointvec, | |
2092 | }, | |
2093 | { | |
2094 | .procname = "cap_last_cap", | |
2095 | .data = (void *)&cap_last_cap, | |
2096 | .maxlen = sizeof(int), | |
2097 | .mode = 0444, | |
2098 | .proc_handler = proc_dointvec, | |
2099 | }, | |
f461d2dc CH |
2100 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
2101 | { | |
2102 | .procname = "unknown_nmi_panic", | |
2103 | .data = &unknown_nmi_panic, | |
2104 | .maxlen = sizeof (int), | |
2105 | .mode = 0644, | |
2106 | .proc_handler = proc_dointvec, | |
2107 | }, | |
2108 | #endif | |
61d9b56a | 2109 | |
cb8e59cc LT |
2110 | #if (defined(CONFIG_X86_32) || defined(CONFIG_PARISC)) && \ |
2111 | defined(CONFIG_DEBUG_STACKOVERFLOW) | |
f461d2dc | 2112 | { |
cb8e59cc LT |
2113 | .procname = "panic_on_stackoverflow", |
2114 | .data = &sysctl_panic_on_stackoverflow, | |
f461d2dc CH |
2115 | .maxlen = sizeof(int), |
2116 | .mode = 0644, | |
2117 | .proc_handler = proc_dointvec, | |
2118 | }, | |
cb8e59cc LT |
2119 | #endif |
2120 | #if defined(CONFIG_X86) | |
f461d2dc | 2121 | { |
cb8e59cc LT |
2122 | .procname = "panic_on_unrecovered_nmi", |
2123 | .data = &panic_on_unrecovered_nmi, | |
f461d2dc CH |
2124 | .maxlen = sizeof(int), |
2125 | .mode = 0644, | |
2126 | .proc_handler = proc_dointvec, | |
2127 | }, | |
f461d2dc | 2128 | { |
cb8e59cc LT |
2129 | .procname = "panic_on_io_nmi", |
2130 | .data = &panic_on_io_nmi, | |
f461d2dc CH |
2131 | .maxlen = sizeof(int), |
2132 | .mode = 0644, | |
2133 | .proc_handler = proc_dointvec, | |
2134 | }, | |
f461d2dc CH |
2135 | { |
2136 | .procname = "bootloader_type", | |
2137 | .data = &bootloader_type, | |
2138 | .maxlen = sizeof (int), | |
2139 | .mode = 0444, | |
2140 | .proc_handler = proc_dointvec, | |
2141 | }, | |
2142 | { | |
2143 | .procname = "bootloader_version", | |
2144 | .data = &bootloader_version, | |
2145 | .maxlen = sizeof (int), | |
2146 | .mode = 0444, | |
2147 | .proc_handler = proc_dointvec, | |
2148 | }, | |
2149 | { | |
2150 | .procname = "io_delay_type", | |
2151 | .data = &io_delay_type, | |
2152 | .maxlen = sizeof(int), | |
2153 | .mode = 0644, | |
2154 | .proc_handler = proc_dointvec, | |
2155 | }, | |
2156 | #endif | |
2157 | #if defined(CONFIG_MMU) | |
2158 | { | |
2159 | .procname = "randomize_va_space", | |
2160 | .data = &randomize_va_space, | |
2161 | .maxlen = sizeof(int), | |
2162 | .mode = 0644, | |
2163 | .proc_handler = proc_dointvec, | |
2164 | }, | |
2165 | #endif | |
2166 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) | |
2167 | { | |
2168 | .procname = "spin_retry", | |
2169 | .data = &spin_retry, | |
2170 | .maxlen = sizeof (int), | |
2171 | .mode = 0644, | |
2172 | .proc_handler = proc_dointvec, | |
2173 | }, | |
2174 | #endif | |
2175 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) | |
2176 | { | |
2177 | .procname = "acpi_video_flags", | |
2178 | .data = &acpi_realmode_flags, | |
2179 | .maxlen = sizeof (unsigned long), | |
2180 | .mode = 0644, | |
2181 | .proc_handler = proc_doulongvec_minmax, | |
2182 | }, | |
2183 | #endif | |
2184 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN | |
2185 | { | |
2186 | .procname = "ignore-unaligned-usertrap", | |
2187 | .data = &no_unaligned_warning, | |
2188 | .maxlen = sizeof (int), | |
2189 | .mode = 0644, | |
2190 | .proc_handler = proc_dointvec, | |
2191 | }, | |
2192 | #endif | |
2193 | #ifdef CONFIG_IA64 | |
2194 | { | |
2195 | .procname = "unaligned-dump-stack", | |
2196 | .data = &unaligned_dump_stack, | |
2197 | .maxlen = sizeof (int), | |
2198 | .mode = 0644, | |
2199 | .proc_handler = proc_dointvec, | |
2200 | }, | |
2201 | #endif | |
f461d2dc CH |
2202 | #ifdef CONFIG_RT_MUTEXES |
2203 | { | |
2204 | .procname = "max_lock_depth", | |
2205 | .data = &max_lock_depth, | |
2206 | .maxlen = sizeof(int), | |
2207 | .mode = 0644, | |
2208 | .proc_handler = proc_dointvec, | |
2209 | }, | |
2210 | #endif | |
2211 | { | |
2212 | .procname = "poweroff_cmd", | |
2213 | .data = &poweroff_cmd, | |
2214 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
2215 | .mode = 0644, | |
2216 | .proc_handler = proc_dostring, | |
2217 | }, | |
2218 | #ifdef CONFIG_KEYS | |
2219 | { | |
2220 | .procname = "keys", | |
2221 | .mode = 0555, | |
2222 | .child = key_sysctls, | |
2223 | }, | |
2224 | #endif | |
2225 | #ifdef CONFIG_PERF_EVENTS | |
2226 | /* | |
2227 | * User-space scripts rely on the existence of this file | |
2228 | * as a feature check for perf_events being enabled. | |
2229 | * | |
2230 | * So it's an ABI, do not remove! | |
2231 | */ | |
2232 | { | |
2233 | .procname = "perf_event_paranoid", | |
2234 | .data = &sysctl_perf_event_paranoid, | |
2235 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
2236 | .mode = 0644, | |
2237 | .proc_handler = proc_dointvec, | |
2238 | }, | |
2239 | { | |
2240 | .procname = "perf_event_mlock_kb", | |
2241 | .data = &sysctl_perf_event_mlock, | |
2242 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
2243 | .mode = 0644, | |
2244 | .proc_handler = proc_dointvec, | |
2245 | }, | |
2246 | { | |
2247 | .procname = "perf_event_max_sample_rate", | |
2248 | .data = &sysctl_perf_event_sample_rate, | |
2249 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
2250 | .mode = 0644, | |
2251 | .proc_handler = perf_proc_update_handler, | |
2252 | .extra1 = SYSCTL_ONE, | |
2253 | }, | |
2254 | { | |
2255 | .procname = "perf_cpu_time_max_percent", | |
2256 | .data = &sysctl_perf_cpu_time_max_percent, | |
2257 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
2258 | .mode = 0644, | |
2259 | .proc_handler = perf_cpu_time_max_percent_handler, | |
2260 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2261 | .extra2 = SYSCTL_ONE_HUNDRED, |
f461d2dc CH |
2262 | }, |
2263 | { | |
2264 | .procname = "perf_event_max_stack", | |
2265 | .data = &sysctl_perf_event_max_stack, | |
2266 | .maxlen = sizeof(sysctl_perf_event_max_stack), | |
2267 | .mode = 0644, | |
2268 | .proc_handler = perf_event_max_stack_handler, | |
2269 | .extra1 = SYSCTL_ZERO, | |
d73840ec | 2270 | .extra2 = (void *)&six_hundred_forty_kb, |
f461d2dc CH |
2271 | }, |
2272 | { | |
2273 | .procname = "perf_event_max_contexts_per_stack", | |
2274 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
2275 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
2276 | .mode = 0644, | |
2277 | .proc_handler = perf_event_max_stack_handler, | |
2278 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2279 | .extra2 = SYSCTL_ONE_THOUSAND, |
f461d2dc CH |
2280 | }, |
2281 | #endif | |
2282 | { | |
2283 | .procname = "panic_on_warn", | |
2284 | .data = &panic_on_warn, | |
2285 | .maxlen = sizeof(int), | |
2286 | .mode = 0644, | |
2287 | .proc_handler = proc_dointvec_minmax, | |
2288 | .extra1 = SYSCTL_ZERO, | |
2289 | .extra2 = SYSCTL_ONE, | |
2290 | }, | |
f461d2dc CH |
2291 | #ifdef CONFIG_BPF_SYSCALL |
2292 | { | |
2293 | .procname = "unprivileged_bpf_disabled", | |
2294 | .data = &sysctl_unprivileged_bpf_disabled, | |
2295 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
2296 | .mode = 0644, | |
08389d88 DB |
2297 | .proc_handler = bpf_unpriv_handler, |
2298 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2299 | .extra2 = SYSCTL_TWO, |
f461d2dc CH |
2300 | }, |
2301 | { | |
2302 | .procname = "bpf_stats_enabled", | |
2303 | .data = &bpf_stats_enabled_key.key, | |
2304 | .maxlen = sizeof(bpf_stats_enabled_key), | |
2305 | .mode = 0644, | |
d46edd67 | 2306 | .proc_handler = bpf_stats_handler, |
f461d2dc CH |
2307 | }, |
2308 | #endif | |
2309 | #if defined(CONFIG_TREE_RCU) | |
2310 | { | |
2311 | .procname = "panic_on_rcu_stall", | |
2312 | .data = &sysctl_panic_on_rcu_stall, | |
2313 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
2314 | .mode = 0644, | |
2315 | .proc_handler = proc_dointvec_minmax, | |
2316 | .extra1 = SYSCTL_ZERO, | |
2317 | .extra2 = SYSCTL_ONE, | |
2318 | }, | |
2319 | #endif | |
dfe56404 | 2320 | #if defined(CONFIG_TREE_RCU) |
2321 | { | |
2322 | .procname = "max_rcu_stall_to_panic", | |
2323 | .data = &sysctl_max_rcu_stall_to_panic, | |
2324 | .maxlen = sizeof(sysctl_max_rcu_stall_to_panic), | |
2325 | .mode = 0644, | |
2326 | .proc_handler = proc_dointvec_minmax, | |
2327 | .extra1 = SYSCTL_ONE, | |
2328 | .extra2 = SYSCTL_INT_MAX, | |
2329 | }, | |
f461d2dc CH |
2330 | #endif |
2331 | { } | |
2332 | }; | |
1da177e4 | 2333 | |
f461d2dc CH |
2334 | static struct ctl_table vm_table[] = { |
2335 | { | |
2336 | .procname = "overcommit_memory", | |
2337 | .data = &sysctl_overcommit_memory, | |
2338 | .maxlen = sizeof(sysctl_overcommit_memory), | |
2339 | .mode = 0644, | |
56f3547b | 2340 | .proc_handler = overcommit_policy_handler, |
f461d2dc | 2341 | .extra1 = SYSCTL_ZERO, |
78e36f3b | 2342 | .extra2 = SYSCTL_TWO, |
f461d2dc CH |
2343 | }, |
2344 | { | |
2345 | .procname = "panic_on_oom", | |
2346 | .data = &sysctl_panic_on_oom, | |
2347 | .maxlen = sizeof(sysctl_panic_on_oom), | |
2348 | .mode = 0644, | |
2349 | .proc_handler = proc_dointvec_minmax, | |
2350 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2351 | .extra2 = SYSCTL_TWO, |
f461d2dc CH |
2352 | }, |
2353 | { | |
2354 | .procname = "oom_kill_allocating_task", | |
2355 | .data = &sysctl_oom_kill_allocating_task, | |
2356 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
2357 | .mode = 0644, | |
2358 | .proc_handler = proc_dointvec, | |
2359 | }, | |
2360 | { | |
2361 | .procname = "oom_dump_tasks", | |
2362 | .data = &sysctl_oom_dump_tasks, | |
2363 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
2364 | .mode = 0644, | |
2365 | .proc_handler = proc_dointvec, | |
2366 | }, | |
2367 | { | |
2368 | .procname = "overcommit_ratio", | |
2369 | .data = &sysctl_overcommit_ratio, | |
2370 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
2371 | .mode = 0644, | |
2372 | .proc_handler = overcommit_ratio_handler, | |
2373 | }, | |
2374 | { | |
2375 | .procname = "overcommit_kbytes", | |
2376 | .data = &sysctl_overcommit_kbytes, | |
2377 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
2378 | .mode = 0644, | |
2379 | .proc_handler = overcommit_kbytes_handler, | |
2380 | }, | |
2381 | { | |
2382 | .procname = "page-cluster", | |
2383 | .data = &page_cluster, | |
2384 | .maxlen = sizeof(int), | |
2385 | .mode = 0644, | |
2386 | .proc_handler = proc_dointvec_minmax, | |
2387 | .extra1 = SYSCTL_ZERO, | |
2388 | }, | |
2389 | { | |
2390 | .procname = "dirty_background_ratio", | |
2391 | .data = &dirty_background_ratio, | |
2392 | .maxlen = sizeof(dirty_background_ratio), | |
2393 | .mode = 0644, | |
2394 | .proc_handler = dirty_background_ratio_handler, | |
2395 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2396 | .extra2 = SYSCTL_ONE_HUNDRED, |
f461d2dc CH |
2397 | }, |
2398 | { | |
2399 | .procname = "dirty_background_bytes", | |
2400 | .data = &dirty_background_bytes, | |
2401 | .maxlen = sizeof(dirty_background_bytes), | |
2402 | .mode = 0644, | |
2403 | .proc_handler = dirty_background_bytes_handler, | |
b1f2aff8 | 2404 | .extra1 = SYSCTL_LONG_ONE, |
f461d2dc CH |
2405 | }, |
2406 | { | |
2407 | .procname = "dirty_ratio", | |
2408 | .data = &vm_dirty_ratio, | |
2409 | .maxlen = sizeof(vm_dirty_ratio), | |
2410 | .mode = 0644, | |
2411 | .proc_handler = dirty_ratio_handler, | |
2412 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2413 | .extra2 = SYSCTL_ONE_HUNDRED, |
f461d2dc CH |
2414 | }, |
2415 | { | |
2416 | .procname = "dirty_bytes", | |
2417 | .data = &vm_dirty_bytes, | |
2418 | .maxlen = sizeof(vm_dirty_bytes), | |
2419 | .mode = 0644, | |
2420 | .proc_handler = dirty_bytes_handler, | |
d73840ec | 2421 | .extra1 = (void *)&dirty_bytes_min, |
f461d2dc CH |
2422 | }, |
2423 | { | |
2424 | .procname = "dirty_writeback_centisecs", | |
2425 | .data = &dirty_writeback_interval, | |
2426 | .maxlen = sizeof(dirty_writeback_interval), | |
2427 | .mode = 0644, | |
2428 | .proc_handler = dirty_writeback_centisecs_handler, | |
2429 | }, | |
2430 | { | |
2431 | .procname = "dirty_expire_centisecs", | |
2432 | .data = &dirty_expire_interval, | |
2433 | .maxlen = sizeof(dirty_expire_interval), | |
2434 | .mode = 0644, | |
2435 | .proc_handler = proc_dointvec_minmax, | |
2436 | .extra1 = SYSCTL_ZERO, | |
2437 | }, | |
2438 | { | |
2439 | .procname = "dirtytime_expire_seconds", | |
2440 | .data = &dirtytime_expire_interval, | |
2441 | .maxlen = sizeof(dirtytime_expire_interval), | |
2442 | .mode = 0644, | |
2443 | .proc_handler = dirtytime_interval_handler, | |
2444 | .extra1 = SYSCTL_ZERO, | |
2445 | }, | |
2446 | { | |
2447 | .procname = "swappiness", | |
2448 | .data = &vm_swappiness, | |
2449 | .maxlen = sizeof(vm_swappiness), | |
2450 | .mode = 0644, | |
2451 | .proc_handler = proc_dointvec_minmax, | |
2452 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2453 | .extra2 = SYSCTL_TWO_HUNDRED, |
f461d2dc CH |
2454 | }, |
2455 | #ifdef CONFIG_HUGETLB_PAGE | |
2456 | { | |
2457 | .procname = "nr_hugepages", | |
2458 | .data = NULL, | |
2459 | .maxlen = sizeof(unsigned long), | |
2460 | .mode = 0644, | |
2461 | .proc_handler = hugetlb_sysctl_handler, | |
2462 | }, | |
2463 | #ifdef CONFIG_NUMA | |
2464 | { | |
2465 | .procname = "nr_hugepages_mempolicy", | |
2466 | .data = NULL, | |
2467 | .maxlen = sizeof(unsigned long), | |
2468 | .mode = 0644, | |
2469 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
2470 | }, | |
2471 | { | |
2472 | .procname = "numa_stat", | |
2473 | .data = &sysctl_vm_numa_stat, | |
2474 | .maxlen = sizeof(int), | |
2475 | .mode = 0644, | |
2476 | .proc_handler = sysctl_vm_numa_stat_handler, | |
2477 | .extra1 = SYSCTL_ZERO, | |
2478 | .extra2 = SYSCTL_ONE, | |
2479 | }, | |
2480 | #endif | |
2481 | { | |
2482 | .procname = "hugetlb_shm_group", | |
2483 | .data = &sysctl_hugetlb_shm_group, | |
2484 | .maxlen = sizeof(gid_t), | |
2485 | .mode = 0644, | |
2486 | .proc_handler = proc_dointvec, | |
2487 | }, | |
2488 | { | |
2489 | .procname = "nr_overcommit_hugepages", | |
2490 | .data = NULL, | |
2491 | .maxlen = sizeof(unsigned long), | |
2492 | .mode = 0644, | |
2493 | .proc_handler = hugetlb_overcommit_handler, | |
2494 | }, | |
2495 | #endif | |
2496 | { | |
2497 | .procname = "lowmem_reserve_ratio", | |
2498 | .data = &sysctl_lowmem_reserve_ratio, | |
2499 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
2500 | .mode = 0644, | |
2501 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, | |
2502 | }, | |
2503 | { | |
2504 | .procname = "drop_caches", | |
2505 | .data = &sysctl_drop_caches, | |
2506 | .maxlen = sizeof(int), | |
2507 | .mode = 0200, | |
2508 | .proc_handler = drop_caches_sysctl_handler, | |
2509 | .extra1 = SYSCTL_ONE, | |
78e36f3b | 2510 | .extra2 = SYSCTL_FOUR, |
f461d2dc CH |
2511 | }, |
2512 | #ifdef CONFIG_COMPACTION | |
2513 | { | |
2514 | .procname = "compact_memory", | |
ef498438 | 2515 | .data = NULL, |
f461d2dc CH |
2516 | .maxlen = sizeof(int), |
2517 | .mode = 0200, | |
2518 | .proc_handler = sysctl_compaction_handler, | |
2519 | }, | |
facdaa91 NG |
2520 | { |
2521 | .procname = "compaction_proactiveness", | |
2522 | .data = &sysctl_compaction_proactiveness, | |
d34c0a75 | 2523 | .maxlen = sizeof(sysctl_compaction_proactiveness), |
facdaa91 | 2524 | .mode = 0644, |
65d759c8 | 2525 | .proc_handler = compaction_proactiveness_sysctl_handler, |
facdaa91 | 2526 | .extra1 = SYSCTL_ZERO, |
78e36f3b | 2527 | .extra2 = SYSCTL_ONE_HUNDRED, |
facdaa91 | 2528 | }, |
f461d2dc CH |
2529 | { |
2530 | .procname = "extfrag_threshold", | |
2531 | .data = &sysctl_extfrag_threshold, | |
2532 | .maxlen = sizeof(int), | |
2533 | .mode = 0644, | |
2534 | .proc_handler = proc_dointvec_minmax, | |
2452dcb9 | 2535 | .extra1 = SYSCTL_ZERO, |
d73840ec | 2536 | .extra2 = (void *)&max_extfrag_threshold, |
f461d2dc CH |
2537 | }, |
2538 | { | |
2539 | .procname = "compact_unevictable_allowed", | |
2540 | .data = &sysctl_compact_unevictable_allowed, | |
2541 | .maxlen = sizeof(int), | |
2542 | .mode = 0644, | |
2543 | .proc_handler = proc_dointvec_minmax_warn_RT_change, | |
2544 | .extra1 = SYSCTL_ZERO, | |
2545 | .extra2 = SYSCTL_ONE, | |
2546 | }, | |
1da177e4 | 2547 | |
f461d2dc CH |
2548 | #endif /* CONFIG_COMPACTION */ |
2549 | { | |
2550 | .procname = "min_free_kbytes", | |
2551 | .data = &min_free_kbytes, | |
2552 | .maxlen = sizeof(min_free_kbytes), | |
2553 | .mode = 0644, | |
2554 | .proc_handler = min_free_kbytes_sysctl_handler, | |
2555 | .extra1 = SYSCTL_ZERO, | |
2556 | }, | |
2557 | { | |
2558 | .procname = "watermark_boost_factor", | |
2559 | .data = &watermark_boost_factor, | |
2560 | .maxlen = sizeof(watermark_boost_factor), | |
2561 | .mode = 0644, | |
2562 | .proc_handler = proc_dointvec_minmax, | |
2563 | .extra1 = SYSCTL_ZERO, | |
2564 | }, | |
2565 | { | |
2566 | .procname = "watermark_scale_factor", | |
2567 | .data = &watermark_scale_factor, | |
2568 | .maxlen = sizeof(watermark_scale_factor), | |
2569 | .mode = 0644, | |
2570 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
2571 | .extra1 = SYSCTL_ONE, | |
78e36f3b | 2572 | .extra2 = SYSCTL_THREE_THOUSAND, |
f461d2dc CH |
2573 | }, |
2574 | { | |
74f44822 MG |
2575 | .procname = "percpu_pagelist_high_fraction", |
2576 | .data = &percpu_pagelist_high_fraction, | |
2577 | .maxlen = sizeof(percpu_pagelist_high_fraction), | |
f461d2dc | 2578 | .mode = 0644, |
74f44822 | 2579 | .proc_handler = percpu_pagelist_high_fraction_sysctl_handler, |
f461d2dc CH |
2580 | .extra1 = SYSCTL_ZERO, |
2581 | }, | |
5ef64cc8 LT |
2582 | { |
2583 | .procname = "page_lock_unfairness", | |
2584 | .data = &sysctl_page_lock_unfairness, | |
2585 | .maxlen = sizeof(sysctl_page_lock_unfairness), | |
2586 | .mode = 0644, | |
2587 | .proc_handler = proc_dointvec_minmax, | |
2588 | .extra1 = SYSCTL_ZERO, | |
2589 | }, | |
f461d2dc CH |
2590 | #ifdef CONFIG_MMU |
2591 | { | |
2592 | .procname = "max_map_count", | |
2593 | .data = &sysctl_max_map_count, | |
2594 | .maxlen = sizeof(sysctl_max_map_count), | |
2595 | .mode = 0644, | |
2596 | .proc_handler = proc_dointvec_minmax, | |
2597 | .extra1 = SYSCTL_ZERO, | |
2598 | }, | |
2599 | #else | |
2600 | { | |
2601 | .procname = "nr_trim_pages", | |
2602 | .data = &sysctl_nr_trim_pages, | |
2603 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
2604 | .mode = 0644, | |
2605 | .proc_handler = proc_dointvec_minmax, | |
2606 | .extra1 = SYSCTL_ZERO, | |
2607 | }, | |
2608 | #endif | |
2609 | { | |
2610 | .procname = "laptop_mode", | |
2611 | .data = &laptop_mode, | |
2612 | .maxlen = sizeof(laptop_mode), | |
2613 | .mode = 0644, | |
2614 | .proc_handler = proc_dointvec_jiffies, | |
2615 | }, | |
f461d2dc CH |
2616 | { |
2617 | .procname = "vfs_cache_pressure", | |
2618 | .data = &sysctl_vfs_cache_pressure, | |
2619 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
2620 | .mode = 0644, | |
3b3376f2 | 2621 | .proc_handler = proc_dointvec_minmax, |
f461d2dc CH |
2622 | .extra1 = SYSCTL_ZERO, |
2623 | }, | |
2624 | #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \ | |
2625 | defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) | |
2626 | { | |
2627 | .procname = "legacy_va_layout", | |
2628 | .data = &sysctl_legacy_va_layout, | |
2629 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
2630 | .mode = 0644, | |
3b3376f2 | 2631 | .proc_handler = proc_dointvec_minmax, |
f461d2dc CH |
2632 | .extra1 = SYSCTL_ZERO, |
2633 | }, | |
2634 | #endif | |
2635 | #ifdef CONFIG_NUMA | |
2636 | { | |
2637 | .procname = "zone_reclaim_mode", | |
2638 | .data = &node_reclaim_mode, | |
2639 | .maxlen = sizeof(node_reclaim_mode), | |
2640 | .mode = 0644, | |
3b3376f2 | 2641 | .proc_handler = proc_dointvec_minmax, |
f461d2dc CH |
2642 | .extra1 = SYSCTL_ZERO, |
2643 | }, | |
2644 | { | |
2645 | .procname = "min_unmapped_ratio", | |
2646 | .data = &sysctl_min_unmapped_ratio, | |
2647 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
2648 | .mode = 0644, | |
2649 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, | |
2650 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2651 | .extra2 = SYSCTL_ONE_HUNDRED, |
f461d2dc CH |
2652 | }, |
2653 | { | |
2654 | .procname = "min_slab_ratio", | |
2655 | .data = &sysctl_min_slab_ratio, | |
2656 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
2657 | .mode = 0644, | |
2658 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, | |
2659 | .extra1 = SYSCTL_ZERO, | |
78e36f3b | 2660 | .extra2 = SYSCTL_ONE_HUNDRED, |
f461d2dc CH |
2661 | }, |
2662 | #endif | |
2663 | #ifdef CONFIG_SMP | |
2664 | { | |
2665 | .procname = "stat_interval", | |
2666 | .data = &sysctl_stat_interval, | |
2667 | .maxlen = sizeof(sysctl_stat_interval), | |
2668 | .mode = 0644, | |
2669 | .proc_handler = proc_dointvec_jiffies, | |
2670 | }, | |
2671 | { | |
2672 | .procname = "stat_refresh", | |
2673 | .data = NULL, | |
2674 | .maxlen = 0, | |
2675 | .mode = 0600, | |
2676 | .proc_handler = vmstat_refresh, | |
2677 | }, | |
2678 | #endif | |
2679 | #ifdef CONFIG_MMU | |
2680 | { | |
2681 | .procname = "mmap_min_addr", | |
2682 | .data = &dac_mmap_min_addr, | |
2683 | .maxlen = sizeof(unsigned long), | |
2684 | .mode = 0644, | |
2685 | .proc_handler = mmap_min_addr_handler, | |
2686 | }, | |
2687 | #endif | |
2688 | #ifdef CONFIG_NUMA | |
2689 | { | |
2690 | .procname = "numa_zonelist_order", | |
2691 | .data = &numa_zonelist_order, | |
2692 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
2693 | .mode = 0644, | |
2694 | .proc_handler = numa_zonelist_order_handler, | |
2695 | }, | |
2696 | #endif | |
2697 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ | |
2698 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) | |
2699 | { | |
2700 | .procname = "vdso_enabled", | |
2701 | #ifdef CONFIG_X86_32 | |
2702 | .data = &vdso32_enabled, | |
2703 | .maxlen = sizeof(vdso32_enabled), | |
2704 | #else | |
2705 | .data = &vdso_enabled, | |
2706 | .maxlen = sizeof(vdso_enabled), | |
2707 | #endif | |
2708 | .mode = 0644, | |
2709 | .proc_handler = proc_dointvec, | |
2710 | .extra1 = SYSCTL_ZERO, | |
2711 | }, | |
2712 | #endif | |
2713 | #ifdef CONFIG_HIGHMEM | |
2714 | { | |
2715 | .procname = "highmem_is_dirtyable", | |
2716 | .data = &vm_highmem_is_dirtyable, | |
2717 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
2718 | .mode = 0644, | |
2719 | .proc_handler = proc_dointvec_minmax, | |
2720 | .extra1 = SYSCTL_ZERO, | |
2721 | .extra2 = SYSCTL_ONE, | |
2722 | }, | |
2723 | #endif | |
2724 | #ifdef CONFIG_MEMORY_FAILURE | |
2725 | { | |
2726 | .procname = "memory_failure_early_kill", | |
2727 | .data = &sysctl_memory_failure_early_kill, | |
2728 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
2729 | .mode = 0644, | |
2730 | .proc_handler = proc_dointvec_minmax, | |
2731 | .extra1 = SYSCTL_ZERO, | |
2732 | .extra2 = SYSCTL_ONE, | |
2733 | }, | |
2734 | { | |
2735 | .procname = "memory_failure_recovery", | |
2736 | .data = &sysctl_memory_failure_recovery, | |
2737 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
2738 | .mode = 0644, | |
2739 | .proc_handler = proc_dointvec_minmax, | |
2740 | .extra1 = SYSCTL_ZERO, | |
2741 | .extra2 = SYSCTL_ONE, | |
2742 | }, | |
2743 | #endif | |
2744 | { | |
2745 | .procname = "user_reserve_kbytes", | |
2746 | .data = &sysctl_user_reserve_kbytes, | |
2747 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
2748 | .mode = 0644, | |
2749 | .proc_handler = proc_doulongvec_minmax, | |
2750 | }, | |
2751 | { | |
2752 | .procname = "admin_reserve_kbytes", | |
2753 | .data = &sysctl_admin_reserve_kbytes, | |
2754 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
2755 | .mode = 0644, | |
2756 | .proc_handler = proc_doulongvec_minmax, | |
2757 | }, | |
2758 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS | |
2759 | { | |
2760 | .procname = "mmap_rnd_bits", | |
2761 | .data = &mmap_rnd_bits, | |
2762 | .maxlen = sizeof(mmap_rnd_bits), | |
2763 | .mode = 0600, | |
2764 | .proc_handler = proc_dointvec_minmax, | |
2765 | .extra1 = (void *)&mmap_rnd_bits_min, | |
2766 | .extra2 = (void *)&mmap_rnd_bits_max, | |
2767 | }, | |
2768 | #endif | |
2769 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
2770 | { | |
2771 | .procname = "mmap_rnd_compat_bits", | |
2772 | .data = &mmap_rnd_compat_bits, | |
2773 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
2774 | .mode = 0600, | |
2775 | .proc_handler = proc_dointvec_minmax, | |
2776 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
2777 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
2778 | }, | |
2779 | #endif | |
2780 | #ifdef CONFIG_USERFAULTFD | |
2781 | { | |
2782 | .procname = "unprivileged_userfaultfd", | |
2783 | .data = &sysctl_unprivileged_userfaultfd, | |
2784 | .maxlen = sizeof(sysctl_unprivileged_userfaultfd), | |
2785 | .mode = 0644, | |
2786 | .proc_handler = proc_dointvec_minmax, | |
2787 | .extra1 = SYSCTL_ZERO, | |
2788 | .extra2 = SYSCTL_ONE, | |
2789 | }, | |
2790 | #endif | |
2791 | { } | |
2792 | }; | |
1da177e4 | 2793 | |
f461d2dc CH |
2794 | static struct ctl_table debug_table[] = { |
2795 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE | |
2796 | { | |
2797 | .procname = "exception-trace", | |
2798 | .data = &show_unhandled_signals, | |
2799 | .maxlen = sizeof(int), | |
2800 | .mode = 0644, | |
2801 | .proc_handler = proc_dointvec | |
2802 | }, | |
f461d2dc CH |
2803 | #endif |
2804 | { } | |
2805 | }; | |
1da177e4 | 2806 | |
f461d2dc CH |
2807 | static struct ctl_table dev_table[] = { |
2808 | { } | |
2809 | }; | |
1da177e4 | 2810 | |
51cb8dfc LC |
2811 | DECLARE_SYSCTL_BASE(kernel, kern_table); |
2812 | DECLARE_SYSCTL_BASE(vm, vm_table); | |
51cb8dfc LC |
2813 | DECLARE_SYSCTL_BASE(debug, debug_table); |
2814 | DECLARE_SYSCTL_BASE(dev, dev_table); | |
1da177e4 | 2815 | |
d8c0418a | 2816 | int __init sysctl_init_bases(void) |
492ecee8 | 2817 | { |
51cb8dfc LC |
2818 | register_sysctl_base(kernel); |
2819 | register_sysctl_base(vm); | |
51cb8dfc LC |
2820 | register_sysctl_base(debug); |
2821 | register_sysctl_base(dev); | |
492ecee8 | 2822 | |
f461d2dc | 2823 | return 0; |
492ecee8 | 2824 | } |
f461d2dc | 2825 | #endif /* CONFIG_SYSCTL */ |
1da177e4 LT |
2826 | /* |
2827 | * No sense putting this after each symbol definition, twice, | |
2828 | * exception granted :-) | |
2829 | */ | |
a2071573 | 2830 | EXPORT_SYMBOL(proc_dobool); |
1da177e4 | 2831 | EXPORT_SYMBOL(proc_dointvec); |
e7d316a0 | 2832 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
2833 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
2834 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 2835 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
1da177e4 LT |
2836 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
2837 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2838 | EXPORT_SYMBOL(proc_dostring); | |
2839 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2840 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
0bc19985 | 2841 | EXPORT_SYMBOL(proc_do_large_bitmap); |