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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 | 22 | #include <linux/module.h> |
e2e40f2c | 23 | #include <linux/aio.h> |
1da177e4 LT |
24 | #include <linux/mm.h> |
25 | #include <linux/swap.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/sysctl.h> | |
5a04cca6 | 28 | #include <linux/bitmap.h> |
d33ed52d | 29 | #include <linux/signal.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> |
62239ac2 | 35 | #include <linux/fs.h> |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <linux/kernel.h> | |
0296b228 | 38 | #include <linux/kobject.h> |
20380731 | 39 | #include <linux/net.h> |
1da177e4 LT |
40 | #include <linux/sysrq.h> |
41 | #include <linux/highuid.h> | |
42 | #include <linux/writeback.h> | |
3fff4c42 | 43 | #include <linux/ratelimit.h> |
76ab0f53 | 44 | #include <linux/compaction.h> |
1da177e4 | 45 | #include <linux/hugetlb.h> |
1da177e4 | 46 | #include <linux/initrd.h> |
0b77f5bf | 47 | #include <linux/key.h> |
1da177e4 LT |
48 | #include <linux/times.h> |
49 | #include <linux/limits.h> | |
50 | #include <linux/dcache.h> | |
6e006701 | 51 | #include <linux/dnotify.h> |
1da177e4 | 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> |
b2be84df | 59 | #include <linux/kprobes.h> |
b492e95b | 60 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 61 | #include <linux/oom.h> |
17f60a7d | 62 | #include <linux/kmod.h> |
73efc039 | 63 | #include <linux/capability.h> |
40401530 | 64 | #include <linux/binfmts.h> |
cf4aebc2 | 65 | #include <linux/sched/sysctl.h> |
f7ccbae4 | 66 | #include <linux/sched/coredump.h> |
7984754b | 67 | #include <linux/kexec.h> |
1be7f75d | 68 | #include <linux/bpf.h> |
d2921684 | 69 | #include <linux/mount.h> |
cefdca0a | 70 | #include <linux/userfaultfd_k.h> |
2374c09b CH |
71 | #include <linux/coredump.h> |
72 | #include <linux/latencytop.h> | |
73 | #include <linux/pid.h> | |
1da177e4 | 74 | |
7f2923c4 CB |
75 | #include "../lib/kstrtox.h" |
76 | ||
7c0f6ba6 | 77 | #include <linux/uaccess.h> |
1da177e4 LT |
78 | #include <asm/processor.h> |
79 | ||
29cbc78b AK |
80 | #ifdef CONFIG_X86 |
81 | #include <asm/nmi.h> | |
0741f4d2 | 82 | #include <asm/stacktrace.h> |
6e7c4025 | 83 | #include <asm/io.h> |
29cbc78b | 84 | #endif |
d550bbd4 DH |
85 | #ifdef CONFIG_SPARC |
86 | #include <asm/setup.h> | |
87 | #endif | |
c55b7c3e DY |
88 | #ifdef CONFIG_BSD_PROCESS_ACCT |
89 | #include <linux/acct.h> | |
90 | #endif | |
4f0e056f DY |
91 | #ifdef CONFIG_RT_MUTEXES |
92 | #include <linux/rtmutex.h> | |
93 | #endif | |
2edf5e49 DY |
94 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
95 | #include <linux/lockdep.h> | |
96 | #endif | |
15485a46 DY |
97 | #ifdef CONFIG_CHR_DEV_SG |
98 | #include <scsi/sg.h> | |
99 | #endif | |
964c9dff AP |
100 | #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE |
101 | #include <linux/stackleak.h> | |
102 | #endif | |
58687acb | 103 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
104 | #include <linux/nmi.h> |
105 | #endif | |
106 | ||
1da177e4 LT |
107 | #if defined(CONFIG_SYSCTL) |
108 | ||
c4f3b63f | 109 | /* Constants used for minimum and maximum */ |
2508ce18 | 110 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
111 | static int sixty = 60; |
112 | #endif | |
113 | ||
270750db | 114 | static int __maybe_unused neg_one = -1; |
cd5f9a4c | 115 | static int __maybe_unused two = 2; |
5509a5d2 | 116 | static int __maybe_unused four = 4; |
9002b214 | 117 | static unsigned long zero_ul; |
fc3501d4 | 118 | static unsigned long one_ul = 1; |
32a5ad9c | 119 | static unsigned long long_max = LONG_MAX; |
c4f3b63f | 120 | static int one_hundred = 100; |
c843966c | 121 | static int two_hundred = 200; |
795ae7a0 | 122 | static int one_thousand = 1000; |
af91322e DY |
123 | #ifdef CONFIG_PRINTK |
124 | static int ten_thousand = 10000; | |
125 | #endif | |
c5dfd78e ACM |
126 | #ifdef CONFIG_PERF_EVENTS |
127 | static int six_hundred_forty_kb = 640 * 1024; | |
128 | #endif | |
c4f3b63f | 129 | |
9e4a5bda AR |
130 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
131 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
132 | ||
1da177e4 LT |
133 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
134 | static int maxolduid = 65535; | |
135 | static int minolduid; | |
136 | ||
137 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 138 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 139 | |
a2e51445 DV |
140 | /* |
141 | * This is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs | |
142 | * and hung_task_check_interval_secs | |
143 | */ | |
80df2847 LH |
144 | #ifdef CONFIG_DETECT_HUNG_TASK |
145 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
146 | #endif | |
147 | ||
d14f1729 DY |
148 | #ifdef CONFIG_INOTIFY_USER |
149 | #include <linux/inotify.h> | |
150 | #endif | |
b6fca725 | 151 | |
d6f8ff73 | 152 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 | 153 | |
a19ac337 LR |
154 | /** |
155 | * enum sysctl_writes_mode - supported sysctl write modes | |
156 | * | |
157 | * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value | |
65f50f25 WH |
158 | * to be written, and multiple writes on the same sysctl file descriptor |
159 | * will rewrite the sysctl value, regardless of file position. No warning | |
160 | * is issued when the initial position is not 0. | |
a19ac337 | 161 | * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is |
65f50f25 | 162 | * not 0. |
a19ac337 | 163 | * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at |
65f50f25 WH |
164 | * file position 0 and the value must be fully contained in the buffer |
165 | * sent to the write syscall. If dealing with strings respect the file | |
166 | * position, but restrict this to the max length of the buffer, anything | |
167 | * passed the max length will be ignored. Multiple writes will append | |
168 | * to the buffer. | |
a19ac337 LR |
169 | * |
170 | * These write modes control how current file position affects the behavior of | |
171 | * updating sysctl values through the proc interface on each write. | |
172 | */ | |
173 | enum sysctl_writes_mode { | |
174 | SYSCTL_WRITES_LEGACY = -1, | |
175 | SYSCTL_WRITES_WARN = 0, | |
176 | SYSCTL_WRITES_STRICT = 1, | |
177 | }; | |
f4aacea2 | 178 | |
a19ac337 | 179 | static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f461d2dc | 180 | #endif /* CONFIG_PROC_SYSCTL */ |
ceb18132 | 181 | |
67f3977f AG |
182 | #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \ |
183 | defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) | |
1da177e4 LT |
184 | int sysctl_legacy_va_layout; |
185 | #endif | |
186 | ||
77e54a1f | 187 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
188 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
189 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
190 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
191 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 192 | #ifdef CONFIG_SMP |
1983a922 CE |
193 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
194 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
195 | #endif /* CONFIG_SMP */ |
196 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 197 | |
5e771905 MG |
198 | #ifdef CONFIG_COMPACTION |
199 | static int min_extfrag_threshold; | |
200 | static int max_extfrag_threshold = 1000; | |
201 | #endif | |
202 | ||
f461d2dc CH |
203 | #endif /* CONFIG_SYSCTL */ |
204 | ||
5447e8e0 | 205 | #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL) |
d46edd67 SL |
206 | static int bpf_stats_handler(struct ctl_table *table, int write, |
207 | void __user *buffer, size_t *lenp, | |
208 | loff_t *ppos) | |
209 | { | |
210 | struct static_key *key = (struct static_key *)table->data; | |
211 | static int saved_val; | |
212 | int val, ret; | |
213 | struct ctl_table tmp = { | |
214 | .data = &val, | |
215 | .maxlen = sizeof(val), | |
216 | .mode = table->mode, | |
217 | .extra1 = SYSCTL_ZERO, | |
218 | .extra2 = SYSCTL_ONE, | |
219 | }; | |
220 | ||
221 | if (write && !capable(CAP_SYS_ADMIN)) | |
222 | return -EPERM; | |
223 | ||
224 | mutex_lock(&bpf_stats_enabled_mutex); | |
225 | val = saved_val; | |
226 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
227 | if (write && !ret && val != saved_val) { | |
228 | if (val) | |
229 | static_key_slow_inc(key); | |
230 | else | |
231 | static_key_slow_dec(key); | |
232 | saved_val = val; | |
233 | } | |
234 | mutex_unlock(&bpf_stats_enabled_mutex); | |
235 | return ret; | |
236 | } | |
046d662f | 237 | #endif |
d46edd67 | 238 | |
f461d2dc CH |
239 | /* |
240 | * /proc/sys support | |
241 | */ | |
242 | ||
b89a8171 | 243 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 244 | |
f8808300 | 245 | static int _proc_do_string(char *data, int maxlen, int write, |
32927393 | 246 | char *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
247 | { |
248 | size_t len; | |
32927393 | 249 | char c, *p; |
8d060877 ON |
250 | |
251 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
252 | *lenp = 0; |
253 | return 0; | |
254 | } | |
8d060877 | 255 | |
1da177e4 | 256 | if (write) { |
f4aacea2 KC |
257 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
258 | /* Only continue writes not past the end of buffer. */ | |
259 | len = strlen(data); | |
260 | if (len > maxlen - 1) | |
261 | len = maxlen - 1; | |
262 | ||
263 | if (*ppos > len) | |
264 | return 0; | |
265 | len = *ppos; | |
266 | } else { | |
267 | /* Start writing from beginning of buffer. */ | |
268 | len = 0; | |
269 | } | |
270 | ||
2ca9bb45 | 271 | *ppos += *lenp; |
1da177e4 | 272 | p = buffer; |
2ca9bb45 | 273 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
32927393 | 274 | c = *(p++); |
1da177e4 LT |
275 | if (c == 0 || c == '\n') |
276 | break; | |
2ca9bb45 | 277 | data[len++] = c; |
1da177e4 | 278 | } |
f8808300 | 279 | data[len] = 0; |
1da177e4 | 280 | } else { |
f5dd3d6f SV |
281 | len = strlen(data); |
282 | if (len > maxlen) | |
283 | len = maxlen; | |
8d060877 ON |
284 | |
285 | if (*ppos > len) { | |
286 | *lenp = 0; | |
287 | return 0; | |
288 | } | |
289 | ||
290 | data += *ppos; | |
291 | len -= *ppos; | |
292 | ||
1da177e4 LT |
293 | if (len > *lenp) |
294 | len = *lenp; | |
295 | if (len) | |
32927393 | 296 | memcpy(buffer, data, len); |
1da177e4 | 297 | if (len < *lenp) { |
32927393 | 298 | buffer[len] = '\n'; |
1da177e4 LT |
299 | len++; |
300 | } | |
301 | *lenp = len; | |
302 | *ppos += len; | |
303 | } | |
304 | return 0; | |
305 | } | |
306 | ||
f4aacea2 KC |
307 | static void warn_sysctl_write(struct ctl_table *table) |
308 | { | |
309 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
310 | "This will not be supported in the future. To silence this\n" | |
311 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
312 | current->comm, table->procname); | |
313 | } | |
314 | ||
d383d484 | 315 | /** |
5f733e8a | 316 | * proc_first_pos_non_zero_ignore - check if first position is allowed |
d383d484 LR |
317 | * @ppos: file position |
318 | * @table: the sysctl table | |
319 | * | |
320 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
321 | * mode indicates this is not allowed for numeric input types. String proc | |
5f733e8a | 322 | * handlers can ignore the return value. |
d383d484 LR |
323 | */ |
324 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
325 | struct ctl_table *table) | |
326 | { | |
327 | if (!*ppos) | |
328 | return false; | |
329 | ||
330 | switch (sysctl_writes_strict) { | |
331 | case SYSCTL_WRITES_STRICT: | |
332 | return true; | |
333 | case SYSCTL_WRITES_WARN: | |
334 | warn_sysctl_write(table); | |
335 | return false; | |
336 | default: | |
337 | return false; | |
338 | } | |
339 | } | |
340 | ||
f5dd3d6f SV |
341 | /** |
342 | * proc_dostring - read a string sysctl | |
343 | * @table: the sysctl table | |
344 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
345 | * @buffer: the user buffer |
346 | * @lenp: the size of the user buffer | |
347 | * @ppos: file position | |
348 | * | |
349 | * Reads/writes a string from/to the user buffer. If the kernel | |
350 | * buffer provided is not large enough to hold the string, the | |
351 | * string is truncated. The copied string is %NULL-terminated. | |
352 | * If the string is being read by the user process, it is copied | |
353 | * and a newline '\n' is added. It is truncated if the buffer is | |
354 | * not large enough. | |
355 | * | |
356 | * Returns 0 on success. | |
357 | */ | |
8d65af78 | 358 | int proc_dostring(struct ctl_table *table, int write, |
32927393 | 359 | void *buffer, size_t *lenp, loff_t *ppos) |
f5dd3d6f | 360 | { |
d383d484 LR |
361 | if (write) |
362 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 363 | |
32927393 CH |
364 | return _proc_do_string(table->data, table->maxlen, write, buffer, lenp, |
365 | ppos); | |
f5dd3d6f SV |
366 | } |
367 | ||
00b7c339 AW |
368 | static size_t proc_skip_spaces(char **buf) |
369 | { | |
370 | size_t ret; | |
371 | char *tmp = skip_spaces(*buf); | |
372 | ret = tmp - *buf; | |
373 | *buf = tmp; | |
374 | return ret; | |
375 | } | |
376 | ||
9f977fb7 OP |
377 | static void proc_skip_char(char **buf, size_t *size, const char v) |
378 | { | |
379 | while (*size) { | |
380 | if (**buf != v) | |
381 | break; | |
382 | (*size)--; | |
383 | (*buf)++; | |
384 | } | |
385 | } | |
386 | ||
7f2923c4 CB |
387 | /** |
388 | * strtoul_lenient - parse an ASCII formatted integer from a buffer and only | |
389 | * fail on overflow | |
390 | * | |
391 | * @cp: kernel buffer containing the string to parse | |
392 | * @endp: pointer to store the trailing characters | |
393 | * @base: the base to use | |
394 | * @res: where the parsed integer will be stored | |
395 | * | |
396 | * In case of success 0 is returned and @res will contain the parsed integer, | |
397 | * @endp will hold any trailing characters. | |
398 | * This function will fail the parse on overflow. If there wasn't an overflow | |
399 | * the function will defer the decision what characters count as invalid to the | |
400 | * caller. | |
401 | */ | |
402 | static int strtoul_lenient(const char *cp, char **endp, unsigned int base, | |
403 | unsigned long *res) | |
404 | { | |
405 | unsigned long long result; | |
406 | unsigned int rv; | |
407 | ||
408 | cp = _parse_integer_fixup_radix(cp, &base); | |
409 | rv = _parse_integer(cp, base, &result); | |
410 | if ((rv & KSTRTOX_OVERFLOW) || (result != (unsigned long)result)) | |
411 | return -ERANGE; | |
412 | ||
413 | cp += rv; | |
414 | ||
415 | if (endp) | |
416 | *endp = (char *)cp; | |
417 | ||
418 | *res = (unsigned long)result; | |
419 | return 0; | |
420 | } | |
421 | ||
00b7c339 AW |
422 | #define TMPBUFLEN 22 |
423 | /** | |
0fc377bd | 424 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 425 | * |
0fc377bd RD |
426 | * @buf: a kernel buffer |
427 | * @size: size of the kernel buffer | |
428 | * @val: this is where the number will be stored | |
429 | * @neg: set to %TRUE if number is negative | |
430 | * @perm_tr: a vector which contains the allowed trailers | |
431 | * @perm_tr_len: size of the perm_tr vector | |
432 | * @tr: pointer to store the trailer character | |
00b7c339 | 433 | * |
0fc377bd RD |
434 | * In case of success %0 is returned and @buf and @size are updated with |
435 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
436 | * character exists (size is non-zero after returning from this | |
437 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
438 | */ |
439 | static int proc_get_long(char **buf, size_t *size, | |
440 | unsigned long *val, bool *neg, | |
441 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
442 | { | |
443 | int len; | |
444 | char *p, tmp[TMPBUFLEN]; | |
445 | ||
446 | if (!*size) | |
447 | return -EINVAL; | |
448 | ||
449 | len = *size; | |
450 | if (len > TMPBUFLEN - 1) | |
451 | len = TMPBUFLEN - 1; | |
452 | ||
453 | memcpy(tmp, *buf, len); | |
454 | ||
455 | tmp[len] = 0; | |
456 | p = tmp; | |
457 | if (*p == '-' && *size > 1) { | |
458 | *neg = true; | |
459 | p++; | |
460 | } else | |
461 | *neg = false; | |
462 | if (!isdigit(*p)) | |
463 | return -EINVAL; | |
464 | ||
7f2923c4 CB |
465 | if (strtoul_lenient(p, &p, 0, val)) |
466 | return -EINVAL; | |
00b7c339 AW |
467 | |
468 | len = p - tmp; | |
469 | ||
470 | /* We don't know if the next char is whitespace thus we may accept | |
471 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
472 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
473 | if (len == TMPBUFLEN - 1) | |
474 | return -EINVAL; | |
475 | ||
476 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
477 | return -EINVAL; | |
1da177e4 | 478 | |
00b7c339 AW |
479 | if (tr && (len < *size)) |
480 | *tr = *p; | |
481 | ||
482 | *buf += len; | |
483 | *size -= len; | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | /** | |
0fc377bd | 489 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 490 | * |
0fc377bd RD |
491 | * @buf: the user buffer |
492 | * @size: the size of the user buffer | |
493 | * @val: the integer to be converted | |
494 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 495 | * |
32927393 CH |
496 | * In case of success @buf and @size are updated with the amount of bytes |
497 | * written. | |
00b7c339 | 498 | */ |
32927393 | 499 | static void proc_put_long(void **buf, size_t *size, unsigned long val, bool neg) |
00b7c339 AW |
500 | { |
501 | int len; | |
502 | char tmp[TMPBUFLEN], *p = tmp; | |
503 | ||
504 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
505 | len = strlen(tmp); | |
506 | if (len > *size) | |
507 | len = *size; | |
32927393 | 508 | memcpy(*buf, tmp, len); |
00b7c339 AW |
509 | *size -= len; |
510 | *buf += len; | |
00b7c339 AW |
511 | } |
512 | #undef TMPBUFLEN | |
513 | ||
32927393 | 514 | static void proc_put_char(void **buf, size_t *size, char c) |
00b7c339 AW |
515 | { |
516 | if (*size) { | |
32927393 CH |
517 | char **buffer = (char **)buf; |
518 | **buffer = c; | |
519 | ||
520 | (*size)--; | |
521 | (*buffer)++; | |
00b7c339 AW |
522 | *buf = *buffer; |
523 | } | |
00b7c339 | 524 | } |
1da177e4 | 525 | |
00b7c339 | 526 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
527 | int *valp, |
528 | int write, void *data) | |
529 | { | |
530 | if (write) { | |
230633d1 HS |
531 | if (*negp) { |
532 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
533 | return -EINVAL; | |
534 | *valp = -*lvalp; | |
535 | } else { | |
536 | if (*lvalp > (unsigned long) INT_MAX) | |
537 | return -EINVAL; | |
538 | *valp = *lvalp; | |
539 | } | |
1da177e4 LT |
540 | } else { |
541 | int val = *valp; | |
542 | if (val < 0) { | |
00b7c339 | 543 | *negp = true; |
9a5bc726 | 544 | *lvalp = -(unsigned long)val; |
1da177e4 | 545 | } else { |
00b7c339 | 546 | *negp = false; |
1da177e4 LT |
547 | *lvalp = (unsigned long)val; |
548 | } | |
549 | } | |
550 | return 0; | |
551 | } | |
552 | ||
4f2fec00 LR |
553 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
554 | unsigned int *valp, | |
555 | int write, void *data) | |
e7d316a0 SAK |
556 | { |
557 | if (write) { | |
425fffd8 LZ |
558 | if (*lvalp > UINT_MAX) |
559 | return -EINVAL; | |
e7d316a0 SAK |
560 | *valp = *lvalp; |
561 | } else { | |
562 | unsigned int val = *valp; | |
563 | *lvalp = (unsigned long)val; | |
564 | } | |
565 | return 0; | |
566 | } | |
567 | ||
00b7c339 AW |
568 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
569 | ||
d8217f07 | 570 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
32927393 | 571 | int write, void *buffer, |
fcfbd547 | 572 | size_t *lenp, loff_t *ppos, |
00b7c339 | 573 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
574 | int write, void *data), |
575 | void *data) | |
576 | { | |
00b7c339 | 577 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 578 | size_t left; |
32927393 | 579 | char *p; |
1da177e4 | 580 | |
00b7c339 | 581 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
582 | *lenp = 0; |
583 | return 0; | |
584 | } | |
585 | ||
fcfbd547 | 586 | i = (int *) tbl_data; |
1da177e4 LT |
587 | vleft = table->maxlen / sizeof(*i); |
588 | left = *lenp; | |
589 | ||
590 | if (!conv) | |
591 | conv = do_proc_dointvec_conv; | |
592 | ||
00b7c339 | 593 | if (write) { |
d383d484 LR |
594 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
595 | goto out; | |
f4aacea2 | 596 | |
00b7c339 AW |
597 | if (left > PAGE_SIZE - 1) |
598 | left = PAGE_SIZE - 1; | |
32927393 | 599 | p = buffer; |
00b7c339 AW |
600 | } |
601 | ||
1da177e4 | 602 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
603 | unsigned long lval; |
604 | bool neg; | |
1da177e4 | 605 | |
00b7c339 | 606 | if (write) { |
70f6cbb6 | 607 | left -= proc_skip_spaces(&p); |
1da177e4 | 608 | |
563b0467 O |
609 | if (!left) |
610 | break; | |
70f6cbb6 | 611 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
612 | proc_wspace_sep, |
613 | sizeof(proc_wspace_sep), NULL); | |
614 | if (err) | |
1da177e4 | 615 | break; |
00b7c339 AW |
616 | if (conv(&neg, &lval, i, 1, data)) { |
617 | err = -EINVAL; | |
1da177e4 | 618 | break; |
00b7c339 | 619 | } |
1da177e4 | 620 | } else { |
00b7c339 AW |
621 | if (conv(&neg, &lval, i, 0, data)) { |
622 | err = -EINVAL; | |
623 | break; | |
624 | } | |
1da177e4 | 625 | if (!first) |
32927393 CH |
626 | proc_put_char(&buffer, &left, '\t'); |
627 | proc_put_long(&buffer, &left, lval, neg); | |
1da177e4 LT |
628 | } |
629 | } | |
630 | ||
00b7c339 | 631 | if (!write && !first && left && !err) |
32927393 | 632 | proc_put_char(&buffer, &left, '\n'); |
563b0467 | 633 | if (write && !err && left) |
70f6cbb6 | 634 | left -= proc_skip_spaces(&p); |
32927393 CH |
635 | if (write && first) |
636 | return err ? : -EINVAL; | |
1da177e4 | 637 | *lenp -= left; |
f4aacea2 | 638 | out: |
1da177e4 | 639 | *ppos += *lenp; |
00b7c339 | 640 | return err; |
1da177e4 LT |
641 | } |
642 | ||
8d65af78 | 643 | static int do_proc_dointvec(struct ctl_table *table, int write, |
32927393 | 644 | void *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 645 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
646 | int write, void *data), |
647 | void *data) | |
648 | { | |
8d65af78 | 649 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
650 | buffer, lenp, ppos, conv, data); |
651 | } | |
652 | ||
4f2fec00 LR |
653 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
654 | struct ctl_table *table, | |
32927393 | 655 | void *buffer, |
4f2fec00 LR |
656 | size_t *lenp, loff_t *ppos, |
657 | int (*conv)(unsigned long *lvalp, | |
658 | unsigned int *valp, | |
659 | int write, void *data), | |
660 | void *data) | |
661 | { | |
662 | unsigned long lval; | |
663 | int err = 0; | |
664 | size_t left; | |
665 | bool neg; | |
32927393 | 666 | char *p = buffer; |
4f2fec00 LR |
667 | |
668 | left = *lenp; | |
669 | ||
670 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
671 | goto bail_early; | |
672 | ||
673 | if (left > PAGE_SIZE - 1) | |
674 | left = PAGE_SIZE - 1; | |
675 | ||
4f2fec00 LR |
676 | left -= proc_skip_spaces(&p); |
677 | if (!left) { | |
678 | err = -EINVAL; | |
679 | goto out_free; | |
680 | } | |
681 | ||
682 | err = proc_get_long(&p, &left, &lval, &neg, | |
683 | proc_wspace_sep, | |
684 | sizeof(proc_wspace_sep), NULL); | |
685 | if (err || neg) { | |
686 | err = -EINVAL; | |
687 | goto out_free; | |
688 | } | |
689 | ||
690 | if (conv(&lval, tbl_data, 1, data)) { | |
691 | err = -EINVAL; | |
692 | goto out_free; | |
693 | } | |
694 | ||
695 | if (!err && left) | |
696 | left -= proc_skip_spaces(&p); | |
697 | ||
698 | out_free: | |
4f2fec00 LR |
699 | if (err) |
700 | return -EINVAL; | |
701 | ||
702 | return 0; | |
703 | ||
704 | /* This is in keeping with old __do_proc_dointvec() */ | |
705 | bail_early: | |
706 | *ppos += *lenp; | |
707 | return err; | |
708 | } | |
709 | ||
32927393 | 710 | static int do_proc_douintvec_r(unsigned int *tbl_data, void *buffer, |
4f2fec00 LR |
711 | size_t *lenp, loff_t *ppos, |
712 | int (*conv)(unsigned long *lvalp, | |
713 | unsigned int *valp, | |
714 | int write, void *data), | |
715 | void *data) | |
716 | { | |
717 | unsigned long lval; | |
718 | int err = 0; | |
719 | size_t left; | |
720 | ||
721 | left = *lenp; | |
722 | ||
723 | if (conv(&lval, tbl_data, 0, data)) { | |
724 | err = -EINVAL; | |
725 | goto out; | |
726 | } | |
727 | ||
32927393 CH |
728 | proc_put_long(&buffer, &left, lval, false); |
729 | if (!left) | |
4f2fec00 LR |
730 | goto out; |
731 | ||
32927393 | 732 | proc_put_char(&buffer, &left, '\n'); |
4f2fec00 LR |
733 | |
734 | out: | |
735 | *lenp -= left; | |
736 | *ppos += *lenp; | |
737 | ||
738 | return err; | |
739 | } | |
740 | ||
741 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
32927393 | 742 | int write, void *buffer, |
4f2fec00 LR |
743 | size_t *lenp, loff_t *ppos, |
744 | int (*conv)(unsigned long *lvalp, | |
745 | unsigned int *valp, | |
746 | int write, void *data), | |
747 | void *data) | |
748 | { | |
749 | unsigned int *i, vleft; | |
750 | ||
751 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
752 | *lenp = 0; | |
753 | return 0; | |
754 | } | |
755 | ||
756 | i = (unsigned int *) tbl_data; | |
757 | vleft = table->maxlen / sizeof(*i); | |
758 | ||
759 | /* | |
760 | * Arrays are not supported, keep this simple. *Do not* add | |
761 | * support for them. | |
762 | */ | |
763 | if (vleft != 1) { | |
764 | *lenp = 0; | |
765 | return -EINVAL; | |
766 | } | |
767 | ||
768 | if (!conv) | |
769 | conv = do_proc_douintvec_conv; | |
770 | ||
771 | if (write) | |
772 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
773 | conv, data); | |
774 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
775 | } | |
776 | ||
777 | static int do_proc_douintvec(struct ctl_table *table, int write, | |
32927393 | 778 | void *buffer, size_t *lenp, loff_t *ppos, |
4f2fec00 LR |
779 | int (*conv)(unsigned long *lvalp, |
780 | unsigned int *valp, | |
781 | int write, void *data), | |
782 | void *data) | |
783 | { | |
784 | return __do_proc_douintvec(table->data, table, write, | |
785 | buffer, lenp, ppos, conv, data); | |
786 | } | |
787 | ||
1da177e4 LT |
788 | /** |
789 | * proc_dointvec - read a vector of integers | |
790 | * @table: the sysctl table | |
791 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
792 | * @buffer: the user buffer |
793 | * @lenp: the size of the user buffer | |
794 | * @ppos: file position | |
795 | * | |
796 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
797 | * values from/to the user buffer, treated as an ASCII string. | |
798 | * | |
799 | * Returns 0 on success. | |
800 | */ | |
32927393 CH |
801 | int proc_dointvec(struct ctl_table *table, int write, void *buffer, |
802 | size_t *lenp, loff_t *ppos) | |
1da177e4 | 803 | { |
e7d316a0 SAK |
804 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
805 | } | |
806 | ||
6923aa0d SAS |
807 | #ifdef CONFIG_COMPACTION |
808 | static int proc_dointvec_minmax_warn_RT_change(struct ctl_table *table, | |
32927393 | 809 | int write, void *buffer, size_t *lenp, loff_t *ppos) |
6923aa0d SAS |
810 | { |
811 | int ret, old; | |
812 | ||
813 | if (!IS_ENABLED(CONFIG_PREEMPT_RT) || !write) | |
814 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
815 | ||
816 | old = *(int *)table->data; | |
817 | ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
818 | if (ret) | |
819 | return ret; | |
820 | if (old != *(int *)table->data) | |
821 | pr_warn_once("sysctl attribute %s changed by %s[%d]\n", | |
822 | table->procname, current->comm, | |
823 | task_pid_nr(current)); | |
824 | return ret; | |
825 | } | |
826 | #endif | |
827 | ||
e7d316a0 SAK |
828 | /** |
829 | * proc_douintvec - read a vector of unsigned integers | |
830 | * @table: the sysctl table | |
831 | * @write: %TRUE if this is a write to the sysctl file | |
832 | * @buffer: the user buffer | |
833 | * @lenp: the size of the user buffer | |
834 | * @ppos: file position | |
835 | * | |
836 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
837 | * values from/to the user buffer, treated as an ASCII string. | |
838 | * | |
839 | * Returns 0 on success. | |
840 | */ | |
32927393 CH |
841 | int proc_douintvec(struct ctl_table *table, int write, void *buffer, |
842 | size_t *lenp, loff_t *ppos) | |
e7d316a0 | 843 | { |
4f2fec00 LR |
844 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
845 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
846 | } |
847 | ||
34f5a398 | 848 | /* |
25ddbb18 AK |
849 | * Taint values can only be increased |
850 | * This means we can safely use a temporary. | |
34f5a398 | 851 | */ |
8d65af78 | 852 | static int proc_taint(struct ctl_table *table, int write, |
32927393 | 853 | void *buffer, size_t *lenp, loff_t *ppos) |
34f5a398 | 854 | { |
25ddbb18 AK |
855 | struct ctl_table t; |
856 | unsigned long tmptaint = get_taint(); | |
857 | int err; | |
34f5a398 | 858 | |
91fcd412 | 859 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
860 | return -EPERM; |
861 | ||
25ddbb18 AK |
862 | t = *table; |
863 | t.data = &tmptaint; | |
8d65af78 | 864 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
865 | if (err < 0) |
866 | return err; | |
867 | ||
868 | if (write) { | |
db38d5c1 RA |
869 | int i; |
870 | ||
871 | /* | |
872 | * If we are relying on panic_on_taint not producing | |
873 | * false positives due to userspace input, bail out | |
874 | * before setting the requested taint flags. | |
875 | */ | |
876 | if (panic_on_taint_nousertaint && (tmptaint & panic_on_taint)) | |
877 | return -EINVAL; | |
878 | ||
25ddbb18 AK |
879 | /* |
880 | * Poor man's atomic or. Not worth adding a primitive | |
881 | * to everyone's atomic.h for this | |
882 | */ | |
e77132e7 RA |
883 | for (i = 0; i < TAINT_FLAGS_COUNT; i++) |
884 | if ((1UL << i) & tmptaint) | |
373d4d09 | 885 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
886 | } |
887 | ||
888 | return err; | |
34f5a398 TT |
889 | } |
890 | ||
bfdc0b49 | 891 | #ifdef CONFIG_PRINTK |
620f6e8e | 892 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
32927393 | 893 | void *buffer, size_t *lenp, loff_t *ppos) |
bfdc0b49 RW |
894 | { |
895 | if (write && !capable(CAP_SYS_ADMIN)) | |
896 | return -EPERM; | |
897 | ||
898 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
899 | } | |
900 | #endif | |
901 | ||
24704f36 WL |
902 | /** |
903 | * struct do_proc_dointvec_minmax_conv_param - proc_dointvec_minmax() range checking structure | |
904 | * @min: pointer to minimum allowable value | |
905 | * @max: pointer to maximum allowable value | |
906 | * | |
907 | * The do_proc_dointvec_minmax_conv_param structure provides the | |
908 | * minimum and maximum values for doing range checking for those sysctl | |
909 | * parameters that use the proc_dointvec_minmax() handler. | |
910 | */ | |
1da177e4 LT |
911 | struct do_proc_dointvec_minmax_conv_param { |
912 | int *min; | |
913 | int *max; | |
914 | }; | |
915 | ||
00b7c339 AW |
916 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
917 | int *valp, | |
1da177e4 LT |
918 | int write, void *data) |
919 | { | |
2bc4fc60 | 920 | int tmp, ret; |
1da177e4 | 921 | struct do_proc_dointvec_minmax_conv_param *param = data; |
2bc4fc60 ZW |
922 | /* |
923 | * If writing, first do so via a temporary local int so we can | |
924 | * bounds-check it before touching *valp. | |
925 | */ | |
926 | int *ip = write ? &tmp : valp; | |
927 | ||
928 | ret = do_proc_dointvec_conv(negp, lvalp, ip, write, data); | |
929 | if (ret) | |
930 | return ret; | |
931 | ||
1da177e4 | 932 | if (write) { |
2bc4fc60 ZW |
933 | if ((param->min && *param->min > tmp) || |
934 | (param->max && *param->max < tmp)) | |
1da177e4 | 935 | return -EINVAL; |
2bc4fc60 | 936 | *valp = tmp; |
1da177e4 | 937 | } |
2bc4fc60 | 938 | |
1da177e4 LT |
939 | return 0; |
940 | } | |
941 | ||
942 | /** | |
943 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
944 | * @table: the sysctl table | |
945 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
946 | * @buffer: the user buffer |
947 | * @lenp: the size of the user buffer | |
948 | * @ppos: file position | |
949 | * | |
950 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
951 | * values from/to the user buffer, treated as an ASCII string. | |
952 | * | |
953 | * This routine will ensure the values are within the range specified by | |
954 | * table->extra1 (min) and table->extra2 (max). | |
955 | * | |
24704f36 | 956 | * Returns 0 on success or -EINVAL on write when the range check fails. |
1da177e4 | 957 | */ |
8d65af78 | 958 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
32927393 | 959 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
960 | { |
961 | struct do_proc_dointvec_minmax_conv_param param = { | |
962 | .min = (int *) table->extra1, | |
963 | .max = (int *) table->extra2, | |
964 | }; | |
8d65af78 | 965 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
966 | do_proc_dointvec_minmax_conv, ¶m); |
967 | } | |
968 | ||
24704f36 WL |
969 | /** |
970 | * struct do_proc_douintvec_minmax_conv_param - proc_douintvec_minmax() range checking structure | |
971 | * @min: pointer to minimum allowable value | |
972 | * @max: pointer to maximum allowable value | |
973 | * | |
974 | * The do_proc_douintvec_minmax_conv_param structure provides the | |
975 | * minimum and maximum values for doing range checking for those sysctl | |
976 | * parameters that use the proc_douintvec_minmax() handler. | |
977 | */ | |
61d9b56a LR |
978 | struct do_proc_douintvec_minmax_conv_param { |
979 | unsigned int *min; | |
980 | unsigned int *max; | |
981 | }; | |
982 | ||
983 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
984 | unsigned int *valp, | |
985 | int write, void *data) | |
986 | { | |
2bc4fc60 ZW |
987 | int ret; |
988 | unsigned int tmp; | |
61d9b56a | 989 | struct do_proc_douintvec_minmax_conv_param *param = data; |
2bc4fc60 ZW |
990 | /* write via temporary local uint for bounds-checking */ |
991 | unsigned int *up = write ? &tmp : valp; | |
61d9b56a | 992 | |
2bc4fc60 ZW |
993 | ret = do_proc_douintvec_conv(lvalp, up, write, data); |
994 | if (ret) | |
995 | return ret; | |
fb910c42 | 996 | |
2bc4fc60 ZW |
997 | if (write) { |
998 | if ((param->min && *param->min > tmp) || | |
999 | (param->max && *param->max < tmp)) | |
61d9b56a LR |
1000 | return -ERANGE; |
1001 | ||
2bc4fc60 | 1002 | *valp = tmp; |
61d9b56a LR |
1003 | } |
1004 | ||
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | /** | |
1009 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
1010 | * @table: the sysctl table | |
1011 | * @write: %TRUE if this is a write to the sysctl file | |
1012 | * @buffer: the user buffer | |
1013 | * @lenp: the size of the user buffer | |
1014 | * @ppos: file position | |
1015 | * | |
1016 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
1017 | * values from/to the user buffer, treated as an ASCII string. Negative | |
1018 | * strings are not allowed. | |
1019 | * | |
1020 | * This routine will ensure the values are within the range specified by | |
1021 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
1022 | * check for UINT_MAX to avoid having to support wrap around uses from | |
1023 | * userspace. | |
1024 | * | |
24704f36 | 1025 | * Returns 0 on success or -ERANGE on write when the range check fails. |
61d9b56a LR |
1026 | */ |
1027 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
32927393 | 1028 | void *buffer, size_t *lenp, loff_t *ppos) |
61d9b56a LR |
1029 | { |
1030 | struct do_proc_douintvec_minmax_conv_param param = { | |
1031 | .min = (unsigned int *) table->extra1, | |
1032 | .max = (unsigned int *) table->extra2, | |
1033 | }; | |
1034 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
1035 | do_proc_douintvec_minmax_conv, ¶m); | |
1036 | } | |
1037 | ||
7a8d1819 JL |
1038 | static int do_proc_dopipe_max_size_conv(unsigned long *lvalp, |
1039 | unsigned int *valp, | |
1040 | int write, void *data) | |
1041 | { | |
7a8d1819 | 1042 | if (write) { |
fb910c42 | 1043 | unsigned int val; |
7a8d1819 | 1044 | |
fb910c42 | 1045 | val = round_pipe_size(*lvalp); |
7a8d1819 JL |
1046 | if (val == 0) |
1047 | return -EINVAL; | |
1048 | ||
7a8d1819 JL |
1049 | *valp = val; |
1050 | } else { | |
1051 | unsigned int val = *valp; | |
1052 | *lvalp = (unsigned long) val; | |
1053 | } | |
1054 | ||
1055 | return 0; | |
1056 | } | |
1057 | ||
319e0a21 | 1058 | static int proc_dopipe_max_size(struct ctl_table *table, int write, |
32927393 | 1059 | void *buffer, size_t *lenp, loff_t *ppos) |
7a8d1819 | 1060 | { |
7a8d1819 | 1061 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
4c2e4bef | 1062 | do_proc_dopipe_max_size_conv, NULL); |
7a8d1819 JL |
1063 | } |
1064 | ||
54b50199 KC |
1065 | static void validate_coredump_safety(void) |
1066 | { | |
046d662f | 1067 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 1068 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 1069 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
1070 | printk(KERN_WARNING |
1071 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
1072 | "Pipe handler or fully qualified core dump path required.\n" | |
1073 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
1074 | ); | |
54b50199 | 1075 | } |
046d662f | 1076 | #endif |
54b50199 KC |
1077 | } |
1078 | ||
1079 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
32927393 | 1080 | void *buffer, size_t *lenp, loff_t *ppos) |
54b50199 KC |
1081 | { |
1082 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
1083 | if (!error) | |
1084 | validate_coredump_safety(); | |
1085 | return error; | |
1086 | } | |
1087 | ||
046d662f | 1088 | #ifdef CONFIG_COREDUMP |
54b50199 | 1089 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
32927393 | 1090 | void *buffer, size_t *lenp, loff_t *ppos) |
54b50199 KC |
1091 | { |
1092 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
1093 | if (!error) | |
1094 | validate_coredump_safety(); | |
1095 | return error; | |
1096 | } | |
046d662f | 1097 | #endif |
54b50199 | 1098 | |
eaee4172 DS |
1099 | #ifdef CONFIG_MAGIC_SYSRQ |
1100 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, | |
32927393 | 1101 | void *buffer, size_t *lenp, loff_t *ppos) |
eaee4172 DS |
1102 | { |
1103 | int tmp, ret; | |
1104 | ||
1105 | tmp = sysrq_mask(); | |
1106 | ||
1107 | ret = __do_proc_dointvec(&tmp, table, write, buffer, | |
1108 | lenp, ppos, NULL, NULL); | |
1109 | if (ret || !write) | |
1110 | return ret; | |
1111 | ||
1112 | if (write) | |
1113 | sysrq_toggle_support(tmp); | |
1114 | ||
1115 | return 0; | |
1116 | } | |
1117 | #endif | |
1118 | ||
32927393 CH |
1119 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, |
1120 | int write, void *buffer, size_t *lenp, loff_t *ppos, | |
1121 | unsigned long convmul, unsigned long convdiv) | |
1da177e4 | 1122 | { |
00b7c339 AW |
1123 | unsigned long *i, *min, *max; |
1124 | int vleft, first = 1, err = 0; | |
00b7c339 | 1125 | size_t left; |
32927393 | 1126 | char *p; |
00b7c339 AW |
1127 | |
1128 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
1129 | *lenp = 0; |
1130 | return 0; | |
1131 | } | |
00b7c339 | 1132 | |
fcfbd547 | 1133 | i = (unsigned long *) data; |
1da177e4 LT |
1134 | min = (unsigned long *) table->extra1; |
1135 | max = (unsigned long *) table->extra2; | |
1136 | vleft = table->maxlen / sizeof(unsigned long); | |
1137 | left = *lenp; | |
00b7c339 AW |
1138 | |
1139 | if (write) { | |
d383d484 LR |
1140 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
1141 | goto out; | |
f4aacea2 | 1142 | |
00b7c339 AW |
1143 | if (left > PAGE_SIZE - 1) |
1144 | left = PAGE_SIZE - 1; | |
32927393 | 1145 | p = buffer; |
00b7c339 AW |
1146 | } |
1147 | ||
27b3d80a | 1148 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
1149 | unsigned long val; |
1150 | ||
1da177e4 | 1151 | if (write) { |
00b7c339 AW |
1152 | bool neg; |
1153 | ||
70f6cbb6 | 1154 | left -= proc_skip_spaces(&p); |
09be1784 CL |
1155 | if (!left) |
1156 | break; | |
00b7c339 | 1157 | |
70f6cbb6 | 1158 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
1159 | proc_wspace_sep, |
1160 | sizeof(proc_wspace_sep), NULL); | |
1161 | if (err) | |
1da177e4 LT |
1162 | break; |
1163 | if (neg) | |
1da177e4 | 1164 | continue; |
ff9f8a7c | 1165 | val = convmul * val / convdiv; |
e260ad01 CB |
1166 | if ((min && val < *min) || (max && val > *max)) { |
1167 | err = -EINVAL; | |
1168 | break; | |
1169 | } | |
1da177e4 LT |
1170 | *i = val; |
1171 | } else { | |
00b7c339 | 1172 | val = convdiv * (*i) / convmul; |
32927393 CH |
1173 | if (!first) |
1174 | proc_put_char(&buffer, &left, '\t'); | |
1175 | proc_put_long(&buffer, &left, val, false); | |
1da177e4 LT |
1176 | } |
1177 | } | |
1178 | ||
00b7c339 | 1179 | if (!write && !first && left && !err) |
32927393 | 1180 | proc_put_char(&buffer, &left, '\n'); |
00b7c339 | 1181 | if (write && !err) |
70f6cbb6 | 1182 | left -= proc_skip_spaces(&p); |
32927393 CH |
1183 | if (write && first) |
1184 | return err ? : -EINVAL; | |
1da177e4 | 1185 | *lenp -= left; |
f4aacea2 | 1186 | out: |
1da177e4 | 1187 | *ppos += *lenp; |
00b7c339 | 1188 | return err; |
1da177e4 LT |
1189 | } |
1190 | ||
d8217f07 | 1191 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
32927393 CH |
1192 | void *buffer, size_t *lenp, loff_t *ppos, unsigned long convmul, |
1193 | unsigned long convdiv) | |
fcfbd547 KK |
1194 | { |
1195 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 1196 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
1197 | } |
1198 | ||
1da177e4 LT |
1199 | /** |
1200 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
1201 | * @table: the sysctl table | |
1202 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1203 | * @buffer: the user buffer |
1204 | * @lenp: the size of the user buffer | |
1205 | * @ppos: file position | |
1206 | * | |
1207 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
1208 | * values from/to the user buffer, treated as an ASCII string. | |
1209 | * | |
1210 | * This routine will ensure the values are within the range specified by | |
1211 | * table->extra1 (min) and table->extra2 (max). | |
1212 | * | |
1213 | * Returns 0 on success. | |
1214 | */ | |
8d65af78 | 1215 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
32927393 | 1216 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1217 | { |
8d65af78 | 1218 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
1219 | } |
1220 | ||
1221 | /** | |
1222 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
1223 | * @table: the sysctl table | |
1224 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1225 | * @buffer: the user buffer |
1226 | * @lenp: the size of the user buffer | |
1227 | * @ppos: file position | |
1228 | * | |
1229 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
1230 | * values from/to the user buffer, treated as an ASCII string. The values | |
1231 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
1232 | * | |
1233 | * This routine will ensure the values are within the range specified by | |
1234 | * table->extra1 (min) and table->extra2 (max). | |
1235 | * | |
1236 | * Returns 0 on success. | |
1237 | */ | |
d8217f07 | 1238 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
32927393 | 1239 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1240 | { |
8d65af78 | 1241 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
1242 | lenp, ppos, HZ, 1000l); |
1243 | } | |
1244 | ||
1245 | ||
00b7c339 | 1246 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1247 | int *valp, |
1248 | int write, void *data) | |
1249 | { | |
1250 | if (write) { | |
63259457 | 1251 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 1252 | return 1; |
1da177e4 LT |
1253 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
1254 | } else { | |
1255 | int val = *valp; | |
1256 | unsigned long lval; | |
1257 | if (val < 0) { | |
00b7c339 | 1258 | *negp = true; |
9a5bc726 | 1259 | lval = -(unsigned long)val; |
1da177e4 | 1260 | } else { |
00b7c339 | 1261 | *negp = false; |
1da177e4 LT |
1262 | lval = (unsigned long)val; |
1263 | } | |
1264 | *lvalp = lval / HZ; | |
1265 | } | |
1266 | return 0; | |
1267 | } | |
1268 | ||
00b7c339 | 1269 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1270 | int *valp, |
1271 | int write, void *data) | |
1272 | { | |
1273 | if (write) { | |
cba9f33d BS |
1274 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
1275 | return 1; | |
1da177e4 LT |
1276 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
1277 | } else { | |
1278 | int val = *valp; | |
1279 | unsigned long lval; | |
1280 | if (val < 0) { | |
00b7c339 | 1281 | *negp = true; |
9a5bc726 | 1282 | lval = -(unsigned long)val; |
1da177e4 | 1283 | } else { |
00b7c339 | 1284 | *negp = false; |
1da177e4 LT |
1285 | lval = (unsigned long)val; |
1286 | } | |
1287 | *lvalp = jiffies_to_clock_t(lval); | |
1288 | } | |
1289 | return 0; | |
1290 | } | |
1291 | ||
00b7c339 | 1292 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1293 | int *valp, |
1294 | int write, void *data) | |
1295 | { | |
1296 | if (write) { | |
d738ce8f FF |
1297 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
1298 | ||
1299 | if (jif > INT_MAX) | |
1300 | return 1; | |
1301 | *valp = (int)jif; | |
1da177e4 LT |
1302 | } else { |
1303 | int val = *valp; | |
1304 | unsigned long lval; | |
1305 | if (val < 0) { | |
00b7c339 | 1306 | *negp = true; |
9a5bc726 | 1307 | lval = -(unsigned long)val; |
1da177e4 | 1308 | } else { |
00b7c339 | 1309 | *negp = false; |
1da177e4 LT |
1310 | lval = (unsigned long)val; |
1311 | } | |
1312 | *lvalp = jiffies_to_msecs(lval); | |
1313 | } | |
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | /** | |
1318 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
1319 | * @table: the sysctl table | |
1320 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1321 | * @buffer: the user buffer |
1322 | * @lenp: the size of the user buffer | |
1323 | * @ppos: file position | |
1324 | * | |
1325 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1326 | * values from/to the user buffer, treated as an ASCII string. | |
1327 | * The values read are assumed to be in seconds, and are converted into | |
1328 | * jiffies. | |
1329 | * | |
1330 | * Returns 0 on success. | |
1331 | */ | |
8d65af78 | 1332 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
32927393 | 1333 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1334 | { |
8d65af78 | 1335 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
1336 | do_proc_dointvec_jiffies_conv,NULL); |
1337 | } | |
1338 | ||
1339 | /** | |
1340 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
1341 | * @table: the sysctl table | |
1342 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1343 | * @buffer: the user buffer |
1344 | * @lenp: the size of the user buffer | |
1e5d5331 | 1345 | * @ppos: pointer to the file position |
1da177e4 LT |
1346 | * |
1347 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1348 | * values from/to the user buffer, treated as an ASCII string. | |
1349 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
1350 | * are converted into jiffies. | |
1351 | * | |
1352 | * Returns 0 on success. | |
1353 | */ | |
8d65af78 | 1354 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
32927393 | 1355 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1356 | { |
8d65af78 | 1357 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
1358 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
1359 | } | |
1360 | ||
1361 | /** | |
1362 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
1363 | * @table: the sysctl table | |
1364 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
1365 | * @buffer: the user buffer |
1366 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
1367 | * @ppos: file position |
1368 | * @ppos: the current position in the file | |
1da177e4 LT |
1369 | * |
1370 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
1371 | * values from/to the user buffer, treated as an ASCII string. | |
1372 | * The values read are assumed to be in 1/1000 seconds, and | |
1373 | * are converted into jiffies. | |
1374 | * | |
1375 | * Returns 0 on success. | |
1376 | */ | |
32927393 CH |
1377 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, void *buffer, |
1378 | size_t *lenp, loff_t *ppos) | |
1da177e4 | 1379 | { |
8d65af78 | 1380 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
1381 | do_proc_dointvec_ms_jiffies_conv, NULL); |
1382 | } | |
1383 | ||
32927393 CH |
1384 | static int proc_do_cad_pid(struct ctl_table *table, int write, void *buffer, |
1385 | size_t *lenp, loff_t *ppos) | |
9ec52099 CLG |
1386 | { |
1387 | struct pid *new_pid; | |
1388 | pid_t tmp; | |
1389 | int r; | |
1390 | ||
6c5f3e7b | 1391 | tmp = pid_vnr(cad_pid); |
9ec52099 | 1392 | |
8d65af78 | 1393 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
1394 | lenp, ppos, NULL, NULL); |
1395 | if (r || !write) | |
1396 | return r; | |
1397 | ||
1398 | new_pid = find_get_pid(tmp); | |
1399 | if (!new_pid) | |
1400 | return -ESRCH; | |
1401 | ||
1402 | put_pid(xchg(&cad_pid, new_pid)); | |
1403 | return 0; | |
1404 | } | |
1405 | ||
9f977fb7 OP |
1406 | /** |
1407 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
1408 | * @table: the sysctl table | |
1409 | * @write: %TRUE if this is a write to the sysctl file | |
1410 | * @buffer: the user buffer | |
1411 | * @lenp: the size of the user buffer | |
1412 | * @ppos: file position | |
1413 | * | |
1414 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
1415 | * in table->maxlen. | |
1416 | * | |
1417 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
1418 | * large bitmaps may be represented in a compact manner. Writing into | |
1419 | * the file will clear the bitmap then update it with the given input. | |
1420 | * | |
1421 | * Returns 0 on success. | |
1422 | */ | |
1423 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
32927393 | 1424 | void *buffer, size_t *lenp, loff_t *ppos) |
9f977fb7 OP |
1425 | { |
1426 | int err = 0; | |
1427 | bool first = 1; | |
1428 | size_t left = *lenp; | |
1429 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 1430 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
1431 | unsigned long *tmp_bitmap = NULL; |
1432 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
1433 | ||
122ff243 | 1434 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
1435 | *lenp = 0; |
1436 | return 0; | |
1437 | } | |
1438 | ||
1439 | if (write) { | |
32927393 | 1440 | char *p = buffer; |
3116ad38 | 1441 | size_t skipped = 0; |
9f977fb7 | 1442 | |
3116ad38 | 1443 | if (left > PAGE_SIZE - 1) { |
9f977fb7 | 1444 | left = PAGE_SIZE - 1; |
3116ad38 ES |
1445 | /* How much of the buffer we'll skip this pass */ |
1446 | skipped = *lenp - left; | |
1447 | } | |
9f977fb7 | 1448 | |
475dae38 | 1449 | tmp_bitmap = bitmap_zalloc(bitmap_len, GFP_KERNEL); |
32927393 | 1450 | if (!tmp_bitmap) |
9f977fb7 | 1451 | return -ENOMEM; |
70f6cbb6 | 1452 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
1453 | while (!err && left) { |
1454 | unsigned long val_a, val_b; | |
1455 | bool neg; | |
3116ad38 | 1456 | size_t saved_left; |
9f977fb7 | 1457 | |
3116ad38 ES |
1458 | /* In case we stop parsing mid-number, we can reset */ |
1459 | saved_left = left; | |
70f6cbb6 | 1460 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 | 1461 | sizeof(tr_a), &c); |
3116ad38 ES |
1462 | /* |
1463 | * If we consumed the entirety of a truncated buffer or | |
1464 | * only one char is left (may be a "-"), then stop here, | |
1465 | * reset, & come back for more. | |
1466 | */ | |
1467 | if ((left <= 1) && skipped) { | |
1468 | left = saved_left; | |
1469 | break; | |
1470 | } | |
1471 | ||
9f977fb7 OP |
1472 | if (err) |
1473 | break; | |
1474 | if (val_a >= bitmap_len || neg) { | |
1475 | err = -EINVAL; | |
1476 | break; | |
1477 | } | |
1478 | ||
1479 | val_b = val_a; | |
1480 | if (left) { | |
70f6cbb6 | 1481 | p++; |
9f977fb7 OP |
1482 | left--; |
1483 | } | |
1484 | ||
1485 | if (c == '-') { | |
70f6cbb6 | 1486 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
1487 | &neg, tr_b, sizeof(tr_b), |
1488 | &c); | |
3116ad38 ES |
1489 | /* |
1490 | * If we consumed all of a truncated buffer or | |
1491 | * then stop here, reset, & come back for more. | |
1492 | */ | |
1493 | if (!left && skipped) { | |
1494 | left = saved_left; | |
1495 | break; | |
1496 | } | |
1497 | ||
9f977fb7 OP |
1498 | if (err) |
1499 | break; | |
1500 | if (val_b >= bitmap_len || neg || | |
1501 | val_a > val_b) { | |
1502 | err = -EINVAL; | |
1503 | break; | |
1504 | } | |
1505 | if (left) { | |
70f6cbb6 | 1506 | p++; |
9f977fb7 OP |
1507 | left--; |
1508 | } | |
1509 | } | |
1510 | ||
5a04cca6 | 1511 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 1512 | first = 0; |
70f6cbb6 | 1513 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 1514 | } |
3116ad38 | 1515 | left += skipped; |
9f977fb7 OP |
1516 | } else { |
1517 | unsigned long bit_a, bit_b = 0; | |
1518 | ||
1519 | while (left) { | |
1520 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
1521 | if (bit_a >= bitmap_len) | |
1522 | break; | |
1523 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
1524 | bit_a + 1) - 1; | |
1525 | ||
32927393 CH |
1526 | if (!first) |
1527 | proc_put_char(&buffer, &left, ','); | |
1528 | proc_put_long(&buffer, &left, bit_a, false); | |
9f977fb7 | 1529 | if (bit_a != bit_b) { |
32927393 CH |
1530 | proc_put_char(&buffer, &left, '-'); |
1531 | proc_put_long(&buffer, &left, bit_b, false); | |
9f977fb7 OP |
1532 | } |
1533 | ||
1534 | first = 0; bit_b++; | |
1535 | } | |
32927393 | 1536 | proc_put_char(&buffer, &left, '\n'); |
9f977fb7 OP |
1537 | } |
1538 | ||
1539 | if (!err) { | |
1540 | if (write) { | |
1541 | if (*ppos) | |
1542 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
1543 | else | |
5a04cca6 | 1544 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 | 1545 | } |
9f977fb7 OP |
1546 | *lenp -= left; |
1547 | *ppos += *lenp; | |
9f977fb7 | 1548 | } |
f9eb2fdd | 1549 | |
475dae38 | 1550 | bitmap_free(tmp_bitmap); |
f9eb2fdd | 1551 | return err; |
9f977fb7 OP |
1552 | } |
1553 | ||
55610500 | 1554 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 1555 | |
8d65af78 | 1556 | int proc_dostring(struct ctl_table *table, int write, |
32927393 | 1557 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
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 | ||
f461d2dc | 1586 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
32927393 | 1587 | void *buffer, size_t *lenp, loff_t *ppos) |
f461d2dc CH |
1588 | { |
1589 | return -ENOSYS; | |
1590 | } | |
1da177e4 | 1591 | |
f461d2dc | 1592 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
32927393 | 1593 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1594 | { |
1595 | return -ENOSYS; | |
1596 | } | |
1597 | ||
f461d2dc | 1598 | int proc_dointvec_ms_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_doulongvec_minmax(struct ctl_table *table, int write, |
32927393 | 1605 | void *buffer, size_t *lenp, loff_t *ppos) |
e7d316a0 SAK |
1606 | { |
1607 | return -ENOSYS; | |
1608 | } | |
1609 | ||
f461d2dc | 1610 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
32927393 | 1611 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1612 | { |
32927393 | 1613 | return -ENOSYS; |
1da177e4 LT |
1614 | } |
1615 | ||
f461d2dc | 1616 | int proc_do_large_bitmap(struct ctl_table *table, int write, |
32927393 | 1617 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1618 | { |
1619 | return -ENOSYS; | |
1620 | } | |
1621 | ||
f461d2dc CH |
1622 | #endif /* CONFIG_PROC_SYSCTL */ |
1623 | ||
1624 | #if defined(CONFIG_SYSCTL) | |
1625 | int proc_do_static_key(struct ctl_table *table, int write, | |
32927393 | 1626 | void *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 | 1627 | { |
f461d2dc CH |
1628 | struct static_key *key = (struct static_key *)table->data; |
1629 | static DEFINE_MUTEX(static_key_mutex); | |
1630 | int val, ret; | |
1631 | struct ctl_table tmp = { | |
1632 | .data = &val, | |
1633 | .maxlen = sizeof(val), | |
1634 | .mode = table->mode, | |
1635 | .extra1 = SYSCTL_ZERO, | |
1636 | .extra2 = SYSCTL_ONE, | |
1637 | }; | |
1638 | ||
1639 | if (write && !capable(CAP_SYS_ADMIN)) | |
1640 | return -EPERM; | |
1641 | ||
1642 | mutex_lock(&static_key_mutex); | |
1643 | val = static_key_enabled(key); | |
1644 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
1645 | if (write && !ret) { | |
1646 | if (val) | |
1647 | static_key_enable(key); | |
1648 | else | |
1649 | static_key_disable(key); | |
1650 | } | |
1651 | mutex_unlock(&static_key_mutex); | |
1652 | return ret; | |
1da177e4 LT |
1653 | } |
1654 | ||
f461d2dc CH |
1655 | static struct ctl_table kern_table[] = { |
1656 | { | |
1657 | .procname = "sched_child_runs_first", | |
1658 | .data = &sysctl_sched_child_runs_first, | |
1659 | .maxlen = sizeof(unsigned int), | |
1660 | .mode = 0644, | |
1661 | .proc_handler = proc_dointvec, | |
1662 | }, | |
1663 | #ifdef CONFIG_SCHED_DEBUG | |
1664 | { | |
1665 | .procname = "sched_min_granularity_ns", | |
1666 | .data = &sysctl_sched_min_granularity, | |
1667 | .maxlen = sizeof(unsigned int), | |
1668 | .mode = 0644, | |
1669 | .proc_handler = sched_proc_update_handler, | |
1670 | .extra1 = &min_sched_granularity_ns, | |
1671 | .extra2 = &max_sched_granularity_ns, | |
1672 | }, | |
1673 | { | |
1674 | .procname = "sched_latency_ns", | |
1675 | .data = &sysctl_sched_latency, | |
1676 | .maxlen = sizeof(unsigned int), | |
1677 | .mode = 0644, | |
1678 | .proc_handler = sched_proc_update_handler, | |
1679 | .extra1 = &min_sched_granularity_ns, | |
1680 | .extra2 = &max_sched_granularity_ns, | |
1681 | }, | |
1682 | { | |
1683 | .procname = "sched_wakeup_granularity_ns", | |
1684 | .data = &sysctl_sched_wakeup_granularity, | |
1685 | .maxlen = sizeof(unsigned int), | |
1686 | .mode = 0644, | |
1687 | .proc_handler = sched_proc_update_handler, | |
1688 | .extra1 = &min_wakeup_granularity_ns, | |
1689 | .extra2 = &max_wakeup_granularity_ns, | |
1690 | }, | |
1691 | #ifdef CONFIG_SMP | |
1692 | { | |
1693 | .procname = "sched_tunable_scaling", | |
1694 | .data = &sysctl_sched_tunable_scaling, | |
1695 | .maxlen = sizeof(enum sched_tunable_scaling), | |
1696 | .mode = 0644, | |
1697 | .proc_handler = sched_proc_update_handler, | |
1698 | .extra1 = &min_sched_tunable_scaling, | |
1699 | .extra2 = &max_sched_tunable_scaling, | |
1700 | }, | |
1701 | { | |
1702 | .procname = "sched_migration_cost_ns", | |
1703 | .data = &sysctl_sched_migration_cost, | |
1704 | .maxlen = sizeof(unsigned int), | |
1705 | .mode = 0644, | |
1706 | .proc_handler = proc_dointvec, | |
1707 | }, | |
1708 | { | |
1709 | .procname = "sched_nr_migrate", | |
1710 | .data = &sysctl_sched_nr_migrate, | |
1711 | .maxlen = sizeof(unsigned int), | |
1712 | .mode = 0644, | |
1713 | .proc_handler = proc_dointvec, | |
1714 | }, | |
1715 | #ifdef CONFIG_SCHEDSTATS | |
1716 | { | |
1717 | .procname = "sched_schedstats", | |
1718 | .data = NULL, | |
1719 | .maxlen = sizeof(unsigned int), | |
1720 | .mode = 0644, | |
1721 | .proc_handler = sysctl_schedstats, | |
1722 | .extra1 = SYSCTL_ZERO, | |
1723 | .extra2 = SYSCTL_ONE, | |
1724 | }, | |
1725 | #endif /* CONFIG_SCHEDSTATS */ | |
1726 | #endif /* CONFIG_SMP */ | |
1727 | #ifdef CONFIG_NUMA_BALANCING | |
1728 | { | |
1729 | .procname = "numa_balancing_scan_delay_ms", | |
1730 | .data = &sysctl_numa_balancing_scan_delay, | |
1731 | .maxlen = sizeof(unsigned int), | |
1732 | .mode = 0644, | |
1733 | .proc_handler = proc_dointvec, | |
1734 | }, | |
1735 | { | |
1736 | .procname = "numa_balancing_scan_period_min_ms", | |
1737 | .data = &sysctl_numa_balancing_scan_period_min, | |
1738 | .maxlen = sizeof(unsigned int), | |
1739 | .mode = 0644, | |
1740 | .proc_handler = proc_dointvec, | |
1741 | }, | |
1742 | { | |
1743 | .procname = "numa_balancing_scan_period_max_ms", | |
1744 | .data = &sysctl_numa_balancing_scan_period_max, | |
1745 | .maxlen = sizeof(unsigned int), | |
1746 | .mode = 0644, | |
1747 | .proc_handler = proc_dointvec, | |
1748 | }, | |
1749 | { | |
1750 | .procname = "numa_balancing_scan_size_mb", | |
1751 | .data = &sysctl_numa_balancing_scan_size, | |
1752 | .maxlen = sizeof(unsigned int), | |
1753 | .mode = 0644, | |
1754 | .proc_handler = proc_dointvec_minmax, | |
1755 | .extra1 = SYSCTL_ONE, | |
1756 | }, | |
1757 | { | |
1758 | .procname = "numa_balancing", | |
1759 | .data = NULL, /* filled in by handler */ | |
1760 | .maxlen = sizeof(unsigned int), | |
1761 | .mode = 0644, | |
1762 | .proc_handler = sysctl_numa_balancing, | |
1763 | .extra1 = SYSCTL_ZERO, | |
1764 | .extra2 = SYSCTL_ONE, | |
1765 | }, | |
1766 | #endif /* CONFIG_NUMA_BALANCING */ | |
1767 | #endif /* CONFIG_SCHED_DEBUG */ | |
1768 | { | |
1769 | .procname = "sched_rt_period_us", | |
1770 | .data = &sysctl_sched_rt_period, | |
1771 | .maxlen = sizeof(unsigned int), | |
1772 | .mode = 0644, | |
1773 | .proc_handler = sched_rt_handler, | |
1774 | }, | |
1775 | { | |
1776 | .procname = "sched_rt_runtime_us", | |
1777 | .data = &sysctl_sched_rt_runtime, | |
1778 | .maxlen = sizeof(int), | |
1779 | .mode = 0644, | |
1780 | .proc_handler = sched_rt_handler, | |
1781 | }, | |
b4098bfc PZ |
1782 | { |
1783 | .procname = "sched_deadline_period_max_us", | |
1784 | .data = &sysctl_sched_dl_period_max, | |
1785 | .maxlen = sizeof(unsigned int), | |
1786 | .mode = 0644, | |
1787 | .proc_handler = proc_dointvec, | |
1788 | }, | |
1789 | { | |
1790 | .procname = "sched_deadline_period_min_us", | |
1791 | .data = &sysctl_sched_dl_period_min, | |
1792 | .maxlen = sizeof(unsigned int), | |
1793 | .mode = 0644, | |
1794 | .proc_handler = proc_dointvec, | |
1795 | }, | |
f461d2dc CH |
1796 | { |
1797 | .procname = "sched_rr_timeslice_ms", | |
1798 | .data = &sysctl_sched_rr_timeslice, | |
1799 | .maxlen = sizeof(int), | |
1800 | .mode = 0644, | |
1801 | .proc_handler = sched_rr_handler, | |
1802 | }, | |
1803 | #ifdef CONFIG_UCLAMP_TASK | |
1804 | { | |
1805 | .procname = "sched_util_clamp_min", | |
1806 | .data = &sysctl_sched_uclamp_util_min, | |
1807 | .maxlen = sizeof(unsigned int), | |
1808 | .mode = 0644, | |
1809 | .proc_handler = sysctl_sched_uclamp_handler, | |
1810 | }, | |
1811 | { | |
1812 | .procname = "sched_util_clamp_max", | |
1813 | .data = &sysctl_sched_uclamp_util_max, | |
1814 | .maxlen = sizeof(unsigned int), | |
1815 | .mode = 0644, | |
1816 | .proc_handler = sysctl_sched_uclamp_handler, | |
1817 | }, | |
13685c4a QY |
1818 | { |
1819 | .procname = "sched_util_clamp_min_rt_default", | |
1820 | .data = &sysctl_sched_uclamp_util_min_rt_default, | |
1821 | .maxlen = sizeof(unsigned int), | |
1822 | .mode = 0644, | |
1823 | .proc_handler = sysctl_sched_uclamp_handler, | |
1824 | }, | |
f461d2dc CH |
1825 | #endif |
1826 | #ifdef CONFIG_SCHED_AUTOGROUP | |
1827 | { | |
1828 | .procname = "sched_autogroup_enabled", | |
1829 | .data = &sysctl_sched_autogroup_enabled, | |
1830 | .maxlen = sizeof(unsigned int), | |
1831 | .mode = 0644, | |
1832 | .proc_handler = proc_dointvec_minmax, | |
1833 | .extra1 = SYSCTL_ZERO, | |
1834 | .extra2 = SYSCTL_ONE, | |
1835 | }, | |
1836 | #endif | |
1837 | #ifdef CONFIG_CFS_BANDWIDTH | |
1838 | { | |
1839 | .procname = "sched_cfs_bandwidth_slice_us", | |
1840 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
1841 | .maxlen = sizeof(unsigned int), | |
1842 | .mode = 0644, | |
1843 | .proc_handler = proc_dointvec_minmax, | |
1844 | .extra1 = SYSCTL_ONE, | |
1845 | }, | |
1846 | #endif | |
1847 | #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) | |
1848 | { | |
1849 | .procname = "sched_energy_aware", | |
1850 | .data = &sysctl_sched_energy_aware, | |
1851 | .maxlen = sizeof(unsigned int), | |
1852 | .mode = 0644, | |
1853 | .proc_handler = sched_energy_aware_handler, | |
1854 | .extra1 = SYSCTL_ZERO, | |
1855 | .extra2 = SYSCTL_ONE, | |
1856 | }, | |
1857 | #endif | |
1858 | #ifdef CONFIG_PROVE_LOCKING | |
1859 | { | |
1860 | .procname = "prove_locking", | |
1861 | .data = &prove_locking, | |
1862 | .maxlen = sizeof(int), | |
1863 | .mode = 0644, | |
1864 | .proc_handler = proc_dointvec, | |
1865 | }, | |
1866 | #endif | |
1867 | #ifdef CONFIG_LOCK_STAT | |
1868 | { | |
1869 | .procname = "lock_stat", | |
1870 | .data = &lock_stat, | |
1871 | .maxlen = sizeof(int), | |
1872 | .mode = 0644, | |
1873 | .proc_handler = proc_dointvec, | |
1874 | }, | |
1875 | #endif | |
1876 | { | |
1877 | .procname = "panic", | |
1878 | .data = &panic_timeout, | |
1879 | .maxlen = sizeof(int), | |
1880 | .mode = 0644, | |
1881 | .proc_handler = proc_dointvec, | |
1882 | }, | |
1883 | #ifdef CONFIG_COREDUMP | |
1884 | { | |
1885 | .procname = "core_uses_pid", | |
1886 | .data = &core_uses_pid, | |
1887 | .maxlen = sizeof(int), | |
1888 | .mode = 0644, | |
1889 | .proc_handler = proc_dointvec, | |
1890 | }, | |
1891 | { | |
1892 | .procname = "core_pattern", | |
1893 | .data = core_pattern, | |
1894 | .maxlen = CORENAME_MAX_SIZE, | |
1895 | .mode = 0644, | |
1896 | .proc_handler = proc_dostring_coredump, | |
1897 | }, | |
1898 | { | |
1899 | .procname = "core_pipe_limit", | |
1900 | .data = &core_pipe_limit, | |
1901 | .maxlen = sizeof(unsigned int), | |
1902 | .mode = 0644, | |
1903 | .proc_handler = proc_dointvec, | |
1904 | }, | |
1905 | #endif | |
1906 | #ifdef CONFIG_PROC_SYSCTL | |
1907 | { | |
1908 | .procname = "tainted", | |
1909 | .maxlen = sizeof(long), | |
1910 | .mode = 0644, | |
1911 | .proc_handler = proc_taint, | |
1912 | }, | |
1913 | { | |
1914 | .procname = "sysctl_writes_strict", | |
1915 | .data = &sysctl_writes_strict, | |
1916 | .maxlen = sizeof(int), | |
1917 | .mode = 0644, | |
1918 | .proc_handler = proc_dointvec_minmax, | |
1919 | .extra1 = &neg_one, | |
1920 | .extra2 = SYSCTL_ONE, | |
1921 | }, | |
1922 | #endif | |
1923 | #ifdef CONFIG_LATENCYTOP | |
1924 | { | |
1925 | .procname = "latencytop", | |
1926 | .data = &latencytop_enabled, | |
1927 | .maxlen = sizeof(int), | |
1928 | .mode = 0644, | |
1929 | .proc_handler = sysctl_latencytop, | |
1930 | }, | |
1931 | #endif | |
1932 | #ifdef CONFIG_BLK_DEV_INITRD | |
1933 | { | |
1934 | .procname = "real-root-dev", | |
1935 | .data = &real_root_dev, | |
1936 | .maxlen = sizeof(int), | |
1937 | .mode = 0644, | |
1938 | .proc_handler = proc_dointvec, | |
1939 | }, | |
1940 | #endif | |
1941 | { | |
1942 | .procname = "print-fatal-signals", | |
1943 | .data = &print_fatal_signals, | |
1944 | .maxlen = sizeof(int), | |
1945 | .mode = 0644, | |
1946 | .proc_handler = proc_dointvec, | |
1947 | }, | |
1948 | #ifdef CONFIG_SPARC | |
1949 | { | |
1950 | .procname = "reboot-cmd", | |
1951 | .data = reboot_command, | |
1952 | .maxlen = 256, | |
1953 | .mode = 0644, | |
1954 | .proc_handler = proc_dostring, | |
1955 | }, | |
1956 | { | |
1957 | .procname = "stop-a", | |
1958 | .data = &stop_a_enabled, | |
1959 | .maxlen = sizeof (int), | |
1960 | .mode = 0644, | |
1961 | .proc_handler = proc_dointvec, | |
1962 | }, | |
1963 | { | |
1964 | .procname = "scons-poweroff", | |
1965 | .data = &scons_pwroff, | |
1966 | .maxlen = sizeof (int), | |
1967 | .mode = 0644, | |
1968 | .proc_handler = proc_dointvec, | |
1969 | }, | |
1970 | #endif | |
1971 | #ifdef CONFIG_SPARC64 | |
1972 | { | |
1973 | .procname = "tsb-ratio", | |
1974 | .data = &sysctl_tsb_ratio, | |
1975 | .maxlen = sizeof (int), | |
1976 | .mode = 0644, | |
1977 | .proc_handler = proc_dointvec, | |
1978 | }, | |
1979 | #endif | |
1980 | #ifdef CONFIG_PARISC | |
1981 | { | |
1982 | .procname = "soft-power", | |
1983 | .data = &pwrsw_enabled, | |
1984 | .maxlen = sizeof (int), | |
1985 | .mode = 0644, | |
1986 | .proc_handler = proc_dointvec, | |
1987 | }, | |
1988 | #endif | |
1989 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1990 | { | |
1991 | .procname = "unaligned-trap", | |
1992 | .data = &unaligned_enabled, | |
1993 | .maxlen = sizeof (int), | |
1994 | .mode = 0644, | |
1995 | .proc_handler = proc_dointvec, | |
1996 | }, | |
1997 | #endif | |
1998 | { | |
1999 | .procname = "ctrl-alt-del", | |
2000 | .data = &C_A_D, | |
2001 | .maxlen = sizeof(int), | |
2002 | .mode = 0644, | |
2003 | .proc_handler = proc_dointvec, | |
2004 | }, | |
2005 | #ifdef CONFIG_FUNCTION_TRACER | |
2006 | { | |
2007 | .procname = "ftrace_enabled", | |
2008 | .data = &ftrace_enabled, | |
2009 | .maxlen = sizeof(int), | |
2010 | .mode = 0644, | |
2011 | .proc_handler = ftrace_enable_sysctl, | |
2012 | }, | |
2013 | #endif | |
2014 | #ifdef CONFIG_STACK_TRACER | |
2015 | { | |
2016 | .procname = "stack_tracer_enabled", | |
2017 | .data = &stack_tracer_enabled, | |
2018 | .maxlen = sizeof(int), | |
2019 | .mode = 0644, | |
2020 | .proc_handler = stack_trace_sysctl, | |
2021 | }, | |
2022 | #endif | |
2023 | #ifdef CONFIG_TRACING | |
2024 | { | |
2025 | .procname = "ftrace_dump_on_oops", | |
2026 | .data = &ftrace_dump_on_oops, | |
2027 | .maxlen = sizeof(int), | |
2028 | .mode = 0644, | |
2029 | .proc_handler = proc_dointvec, | |
2030 | }, | |
2031 | { | |
2032 | .procname = "traceoff_on_warning", | |
2033 | .data = &__disable_trace_on_warning, | |
2034 | .maxlen = sizeof(__disable_trace_on_warning), | |
2035 | .mode = 0644, | |
2036 | .proc_handler = proc_dointvec, | |
2037 | }, | |
2038 | { | |
2039 | .procname = "tracepoint_printk", | |
2040 | .data = &tracepoint_printk, | |
2041 | .maxlen = sizeof(tracepoint_printk), | |
2042 | .mode = 0644, | |
2043 | .proc_handler = tracepoint_printk_sysctl, | |
2044 | }, | |
2045 | #endif | |
2046 | #ifdef CONFIG_KEXEC_CORE | |
2047 | { | |
2048 | .procname = "kexec_load_disabled", | |
2049 | .data = &kexec_load_disabled, | |
2050 | .maxlen = sizeof(int), | |
2051 | .mode = 0644, | |
2052 | /* only handle a transition from default "0" to "1" */ | |
2053 | .proc_handler = proc_dointvec_minmax, | |
2054 | .extra1 = SYSCTL_ONE, | |
2055 | .extra2 = SYSCTL_ONE, | |
2056 | }, | |
2057 | #endif | |
2058 | #ifdef CONFIG_MODULES | |
2059 | { | |
2060 | .procname = "modprobe", | |
2061 | .data = &modprobe_path, | |
2062 | .maxlen = KMOD_PATH_LEN, | |
2063 | .mode = 0644, | |
2064 | .proc_handler = proc_dostring, | |
2065 | }, | |
2066 | { | |
2067 | .procname = "modules_disabled", | |
2068 | .data = &modules_disabled, | |
2069 | .maxlen = sizeof(int), | |
2070 | .mode = 0644, | |
2071 | /* only handle a transition from default "0" to "1" */ | |
2072 | .proc_handler = proc_dointvec_minmax, | |
2073 | .extra1 = SYSCTL_ONE, | |
2074 | .extra2 = SYSCTL_ONE, | |
2075 | }, | |
2076 | #endif | |
2077 | #ifdef CONFIG_UEVENT_HELPER | |
2078 | { | |
2079 | .procname = "hotplug", | |
2080 | .data = &uevent_helper, | |
2081 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
2082 | .mode = 0644, | |
2083 | .proc_handler = proc_dostring, | |
2084 | }, | |
2085 | #endif | |
2086 | #ifdef CONFIG_CHR_DEV_SG | |
2087 | { | |
2088 | .procname = "sg-big-buff", | |
2089 | .data = &sg_big_buff, | |
2090 | .maxlen = sizeof (int), | |
2091 | .mode = 0444, | |
2092 | .proc_handler = proc_dointvec, | |
2093 | }, | |
2094 | #endif | |
2095 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
2096 | { | |
2097 | .procname = "acct", | |
2098 | .data = &acct_parm, | |
2099 | .maxlen = 3*sizeof(int), | |
2100 | .mode = 0644, | |
2101 | .proc_handler = proc_dointvec, | |
2102 | }, | |
2103 | #endif | |
2104 | #ifdef CONFIG_MAGIC_SYSRQ | |
2105 | { | |
2106 | .procname = "sysrq", | |
2107 | .data = NULL, | |
2108 | .maxlen = sizeof (int), | |
2109 | .mode = 0644, | |
2110 | .proc_handler = sysrq_sysctl_handler, | |
2111 | }, | |
2112 | #endif | |
2113 | #ifdef CONFIG_PROC_SYSCTL | |
2114 | { | |
2115 | .procname = "cad_pid", | |
2116 | .data = NULL, | |
2117 | .maxlen = sizeof (int), | |
2118 | .mode = 0600, | |
2119 | .proc_handler = proc_do_cad_pid, | |
2120 | }, | |
2121 | #endif | |
2122 | { | |
2123 | .procname = "threads-max", | |
2124 | .data = NULL, | |
2125 | .maxlen = sizeof(int), | |
2126 | .mode = 0644, | |
2127 | .proc_handler = sysctl_max_threads, | |
2128 | }, | |
2129 | { | |
2130 | .procname = "random", | |
2131 | .mode = 0555, | |
2132 | .child = random_table, | |
2133 | }, | |
2134 | { | |
2135 | .procname = "usermodehelper", | |
2136 | .mode = 0555, | |
2137 | .child = usermodehelper_table, | |
2138 | }, | |
2139 | #ifdef CONFIG_FW_LOADER_USER_HELPER | |
2140 | { | |
2141 | .procname = "firmware_config", | |
2142 | .mode = 0555, | |
2143 | .child = firmware_config_table, | |
2144 | }, | |
2145 | #endif | |
2146 | { | |
2147 | .procname = "overflowuid", | |
2148 | .data = &overflowuid, | |
2149 | .maxlen = sizeof(int), | |
2150 | .mode = 0644, | |
2151 | .proc_handler = proc_dointvec_minmax, | |
2152 | .extra1 = &minolduid, | |
2153 | .extra2 = &maxolduid, | |
2154 | }, | |
2155 | { | |
2156 | .procname = "overflowgid", | |
2157 | .data = &overflowgid, | |
2158 | .maxlen = sizeof(int), | |
2159 | .mode = 0644, | |
2160 | .proc_handler = proc_dointvec_minmax, | |
2161 | .extra1 = &minolduid, | |
2162 | .extra2 = &maxolduid, | |
2163 | }, | |
2164 | #ifdef CONFIG_S390 | |
2165 | { | |
2166 | .procname = "userprocess_debug", | |
2167 | .data = &show_unhandled_signals, | |
2168 | .maxlen = sizeof(int), | |
2169 | .mode = 0644, | |
2170 | .proc_handler = proc_dointvec, | |
2171 | }, | |
2172 | #endif | |
60c958d8 GP |
2173 | #ifdef CONFIG_SMP |
2174 | { | |
2175 | .procname = "oops_all_cpu_backtrace", | |
2176 | .data = &sysctl_oops_all_cpu_backtrace, | |
2177 | .maxlen = sizeof(int), | |
2178 | .mode = 0644, | |
2179 | .proc_handler = proc_dointvec_minmax, | |
2180 | .extra1 = SYSCTL_ZERO, | |
2181 | .extra2 = SYSCTL_ONE, | |
2182 | }, | |
2183 | #endif /* CONFIG_SMP */ | |
f461d2dc CH |
2184 | { |
2185 | .procname = "pid_max", | |
2186 | .data = &pid_max, | |
2187 | .maxlen = sizeof (int), | |
2188 | .mode = 0644, | |
2189 | .proc_handler = proc_dointvec_minmax, | |
2190 | .extra1 = &pid_max_min, | |
2191 | .extra2 = &pid_max_max, | |
2192 | }, | |
2193 | { | |
2194 | .procname = "panic_on_oops", | |
2195 | .data = &panic_on_oops, | |
2196 | .maxlen = sizeof(int), | |
2197 | .mode = 0644, | |
2198 | .proc_handler = proc_dointvec, | |
2199 | }, | |
2200 | { | |
2201 | .procname = "panic_print", | |
2202 | .data = &panic_print, | |
2203 | .maxlen = sizeof(unsigned long), | |
2204 | .mode = 0644, | |
2205 | .proc_handler = proc_doulongvec_minmax, | |
2206 | }, | |
2207 | #if defined CONFIG_PRINTK | |
2208 | { | |
2209 | .procname = "printk", | |
2210 | .data = &console_loglevel, | |
2211 | .maxlen = 4*sizeof(int), | |
2212 | .mode = 0644, | |
2213 | .proc_handler = proc_dointvec, | |
2214 | }, | |
2215 | { | |
2216 | .procname = "printk_ratelimit", | |
2217 | .data = &printk_ratelimit_state.interval, | |
2218 | .maxlen = sizeof(int), | |
2219 | .mode = 0644, | |
2220 | .proc_handler = proc_dointvec_jiffies, | |
2221 | }, | |
2222 | { | |
2223 | .procname = "printk_ratelimit_burst", | |
2224 | .data = &printk_ratelimit_state.burst, | |
2225 | .maxlen = sizeof(int), | |
2226 | .mode = 0644, | |
2227 | .proc_handler = proc_dointvec, | |
2228 | }, | |
2229 | { | |
2230 | .procname = "printk_delay", | |
2231 | .data = &printk_delay_msec, | |
2232 | .maxlen = sizeof(int), | |
2233 | .mode = 0644, | |
2234 | .proc_handler = proc_dointvec_minmax, | |
2235 | .extra1 = SYSCTL_ZERO, | |
2236 | .extra2 = &ten_thousand, | |
2237 | }, | |
2238 | { | |
2239 | .procname = "printk_devkmsg", | |
2240 | .data = devkmsg_log_str, | |
2241 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
2242 | .mode = 0644, | |
2243 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
2244 | }, | |
2245 | { | |
2246 | .procname = "dmesg_restrict", | |
2247 | .data = &dmesg_restrict, | |
2248 | .maxlen = sizeof(int), | |
2249 | .mode = 0644, | |
2250 | .proc_handler = proc_dointvec_minmax_sysadmin, | |
2251 | .extra1 = SYSCTL_ZERO, | |
2252 | .extra2 = SYSCTL_ONE, | |
2253 | }, | |
2254 | { | |
2255 | .procname = "kptr_restrict", | |
2256 | .data = &kptr_restrict, | |
2257 | .maxlen = sizeof(int), | |
2258 | .mode = 0644, | |
2259 | .proc_handler = proc_dointvec_minmax_sysadmin, | |
2260 | .extra1 = SYSCTL_ZERO, | |
2261 | .extra2 = &two, | |
2262 | }, | |
2263 | #endif | |
2264 | { | |
2265 | .procname = "ngroups_max", | |
2266 | .data = &ngroups_max, | |
2267 | .maxlen = sizeof (int), | |
2268 | .mode = 0444, | |
2269 | .proc_handler = proc_dointvec, | |
2270 | }, | |
2271 | { | |
2272 | .procname = "cap_last_cap", | |
2273 | .data = (void *)&cap_last_cap, | |
2274 | .maxlen = sizeof(int), | |
2275 | .mode = 0444, | |
2276 | .proc_handler = proc_dointvec, | |
2277 | }, | |
2278 | #if defined(CONFIG_LOCKUP_DETECTOR) | |
2279 | { | |
2280 | .procname = "watchdog", | |
2281 | .data = &watchdog_user_enabled, | |
2282 | .maxlen = sizeof(int), | |
2283 | .mode = 0644, | |
2284 | .proc_handler = proc_watchdog, | |
2285 | .extra1 = SYSCTL_ZERO, | |
2286 | .extra2 = SYSCTL_ONE, | |
2287 | }, | |
2288 | { | |
2289 | .procname = "watchdog_thresh", | |
2290 | .data = &watchdog_thresh, | |
2291 | .maxlen = sizeof(int), | |
2292 | .mode = 0644, | |
2293 | .proc_handler = proc_watchdog_thresh, | |
2294 | .extra1 = SYSCTL_ZERO, | |
2295 | .extra2 = &sixty, | |
2296 | }, | |
2297 | { | |
2298 | .procname = "nmi_watchdog", | |
2299 | .data = &nmi_watchdog_user_enabled, | |
2300 | .maxlen = sizeof(int), | |
2301 | .mode = NMI_WATCHDOG_SYSCTL_PERM, | |
2302 | .proc_handler = proc_nmi_watchdog, | |
2303 | .extra1 = SYSCTL_ZERO, | |
2304 | .extra2 = SYSCTL_ONE, | |
2305 | }, | |
2306 | { | |
2307 | .procname = "watchdog_cpumask", | |
2308 | .data = &watchdog_cpumask_bits, | |
2309 | .maxlen = NR_CPUS, | |
2310 | .mode = 0644, | |
2311 | .proc_handler = proc_watchdog_cpumask, | |
2312 | }, | |
2313 | #ifdef CONFIG_SOFTLOCKUP_DETECTOR | |
2314 | { | |
2315 | .procname = "soft_watchdog", | |
2316 | .data = &soft_watchdog_user_enabled, | |
2317 | .maxlen = sizeof(int), | |
2318 | .mode = 0644, | |
2319 | .proc_handler = proc_soft_watchdog, | |
2320 | .extra1 = SYSCTL_ZERO, | |
2321 | .extra2 = SYSCTL_ONE, | |
2322 | }, | |
2323 | { | |
2324 | .procname = "softlockup_panic", | |
2325 | .data = &softlockup_panic, | |
2326 | .maxlen = sizeof(int), | |
2327 | .mode = 0644, | |
2328 | .proc_handler = proc_dointvec_minmax, | |
2329 | .extra1 = SYSCTL_ZERO, | |
2330 | .extra2 = SYSCTL_ONE, | |
2331 | }, | |
2332 | #ifdef CONFIG_SMP | |
2333 | { | |
2334 | .procname = "softlockup_all_cpu_backtrace", | |
2335 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
2336 | .maxlen = sizeof(int), | |
2337 | .mode = 0644, | |
2338 | .proc_handler = proc_dointvec_minmax, | |
2339 | .extra1 = SYSCTL_ZERO, | |
2340 | .extra2 = SYSCTL_ONE, | |
2341 | }, | |
2342 | #endif /* CONFIG_SMP */ | |
2343 | #endif | |
2344 | #ifdef CONFIG_HARDLOCKUP_DETECTOR | |
2345 | { | |
2346 | .procname = "hardlockup_panic", | |
2347 | .data = &hardlockup_panic, | |
2348 | .maxlen = sizeof(int), | |
2349 | .mode = 0644, | |
2350 | .proc_handler = proc_dointvec_minmax, | |
2351 | .extra1 = SYSCTL_ZERO, | |
2352 | .extra2 = SYSCTL_ONE, | |
2353 | }, | |
2354 | #ifdef CONFIG_SMP | |
2355 | { | |
2356 | .procname = "hardlockup_all_cpu_backtrace", | |
2357 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
2358 | .maxlen = sizeof(int), | |
2359 | .mode = 0644, | |
2360 | .proc_handler = proc_dointvec_minmax, | |
2361 | .extra1 = SYSCTL_ZERO, | |
2362 | .extra2 = SYSCTL_ONE, | |
2363 | }, | |
2364 | #endif /* CONFIG_SMP */ | |
2365 | #endif | |
2366 | #endif | |
2367 | ||
2368 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
2369 | { | |
2370 | .procname = "unknown_nmi_panic", | |
2371 | .data = &unknown_nmi_panic, | |
2372 | .maxlen = sizeof (int), | |
2373 | .mode = 0644, | |
2374 | .proc_handler = proc_dointvec, | |
2375 | }, | |
2376 | #endif | |
61d9b56a | 2377 | |
cb8e59cc LT |
2378 | #if (defined(CONFIG_X86_32) || defined(CONFIG_PARISC)) && \ |
2379 | defined(CONFIG_DEBUG_STACKOVERFLOW) | |
f461d2dc | 2380 | { |
cb8e59cc LT |
2381 | .procname = "panic_on_stackoverflow", |
2382 | .data = &sysctl_panic_on_stackoverflow, | |
f461d2dc CH |
2383 | .maxlen = sizeof(int), |
2384 | .mode = 0644, | |
2385 | .proc_handler = proc_dointvec, | |
2386 | }, | |
cb8e59cc LT |
2387 | #endif |
2388 | #if defined(CONFIG_X86) | |
f461d2dc | 2389 | { |
cb8e59cc LT |
2390 | .procname = "panic_on_unrecovered_nmi", |
2391 | .data = &panic_on_unrecovered_nmi, | |
f461d2dc CH |
2392 | .maxlen = sizeof(int), |
2393 | .mode = 0644, | |
2394 | .proc_handler = proc_dointvec, | |
2395 | }, | |
f461d2dc | 2396 | { |
cb8e59cc LT |
2397 | .procname = "panic_on_io_nmi", |
2398 | .data = &panic_on_io_nmi, | |
f461d2dc CH |
2399 | .maxlen = sizeof(int), |
2400 | .mode = 0644, | |
2401 | .proc_handler = proc_dointvec, | |
2402 | }, | |
f461d2dc CH |
2403 | { |
2404 | .procname = "bootloader_type", | |
2405 | .data = &bootloader_type, | |
2406 | .maxlen = sizeof (int), | |
2407 | .mode = 0444, | |
2408 | .proc_handler = proc_dointvec, | |
2409 | }, | |
2410 | { | |
2411 | .procname = "bootloader_version", | |
2412 | .data = &bootloader_version, | |
2413 | .maxlen = sizeof (int), | |
2414 | .mode = 0444, | |
2415 | .proc_handler = proc_dointvec, | |
2416 | }, | |
2417 | { | |
2418 | .procname = "io_delay_type", | |
2419 | .data = &io_delay_type, | |
2420 | .maxlen = sizeof(int), | |
2421 | .mode = 0644, | |
2422 | .proc_handler = proc_dointvec, | |
2423 | }, | |
2424 | #endif | |
2425 | #if defined(CONFIG_MMU) | |
2426 | { | |
2427 | .procname = "randomize_va_space", | |
2428 | .data = &randomize_va_space, | |
2429 | .maxlen = sizeof(int), | |
2430 | .mode = 0644, | |
2431 | .proc_handler = proc_dointvec, | |
2432 | }, | |
2433 | #endif | |
2434 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) | |
2435 | { | |
2436 | .procname = "spin_retry", | |
2437 | .data = &spin_retry, | |
2438 | .maxlen = sizeof (int), | |
2439 | .mode = 0644, | |
2440 | .proc_handler = proc_dointvec, | |
2441 | }, | |
2442 | #endif | |
2443 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) | |
2444 | { | |
2445 | .procname = "acpi_video_flags", | |
2446 | .data = &acpi_realmode_flags, | |
2447 | .maxlen = sizeof (unsigned long), | |
2448 | .mode = 0644, | |
2449 | .proc_handler = proc_doulongvec_minmax, | |
2450 | }, | |
2451 | #endif | |
2452 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN | |
2453 | { | |
2454 | .procname = "ignore-unaligned-usertrap", | |
2455 | .data = &no_unaligned_warning, | |
2456 | .maxlen = sizeof (int), | |
2457 | .mode = 0644, | |
2458 | .proc_handler = proc_dointvec, | |
2459 | }, | |
2460 | #endif | |
2461 | #ifdef CONFIG_IA64 | |
2462 | { | |
2463 | .procname = "unaligned-dump-stack", | |
2464 | .data = &unaligned_dump_stack, | |
2465 | .maxlen = sizeof (int), | |
2466 | .mode = 0644, | |
2467 | .proc_handler = proc_dointvec, | |
2468 | }, | |
2469 | #endif | |
2470 | #ifdef CONFIG_DETECT_HUNG_TASK | |
0ec9dc9b GP |
2471 | #ifdef CONFIG_SMP |
2472 | { | |
2473 | .procname = "hung_task_all_cpu_backtrace", | |
2474 | .data = &sysctl_hung_task_all_cpu_backtrace, | |
2475 | .maxlen = sizeof(int), | |
2476 | .mode = 0644, | |
2477 | .proc_handler = proc_dointvec_minmax, | |
2478 | .extra1 = SYSCTL_ZERO, | |
2479 | .extra2 = SYSCTL_ONE, | |
2480 | }, | |
2481 | #endif /* CONFIG_SMP */ | |
f461d2dc CH |
2482 | { |
2483 | .procname = "hung_task_panic", | |
2484 | .data = &sysctl_hung_task_panic, | |
2485 | .maxlen = sizeof(int), | |
2486 | .mode = 0644, | |
2487 | .proc_handler = proc_dointvec_minmax, | |
2488 | .extra1 = SYSCTL_ZERO, | |
2489 | .extra2 = SYSCTL_ONE, | |
2490 | }, | |
2491 | { | |
2492 | .procname = "hung_task_check_count", | |
2493 | .data = &sysctl_hung_task_check_count, | |
2494 | .maxlen = sizeof(int), | |
2495 | .mode = 0644, | |
2496 | .proc_handler = proc_dointvec_minmax, | |
2497 | .extra1 = SYSCTL_ZERO, | |
2498 | }, | |
2499 | { | |
2500 | .procname = "hung_task_timeout_secs", | |
2501 | .data = &sysctl_hung_task_timeout_secs, | |
2502 | .maxlen = sizeof(unsigned long), | |
2503 | .mode = 0644, | |
2504 | .proc_handler = proc_dohung_task_timeout_secs, | |
2505 | .extra2 = &hung_task_timeout_max, | |
2506 | }, | |
2507 | { | |
2508 | .procname = "hung_task_check_interval_secs", | |
2509 | .data = &sysctl_hung_task_check_interval_secs, | |
2510 | .maxlen = sizeof(unsigned long), | |
2511 | .mode = 0644, | |
2512 | .proc_handler = proc_dohung_task_timeout_secs, | |
2513 | .extra2 = &hung_task_timeout_max, | |
2514 | }, | |
2515 | { | |
2516 | .procname = "hung_task_warnings", | |
2517 | .data = &sysctl_hung_task_warnings, | |
2518 | .maxlen = sizeof(int), | |
2519 | .mode = 0644, | |
2520 | .proc_handler = proc_dointvec_minmax, | |
2521 | .extra1 = &neg_one, | |
2522 | }, | |
2523 | #endif | |
2524 | #ifdef CONFIG_RT_MUTEXES | |
2525 | { | |
2526 | .procname = "max_lock_depth", | |
2527 | .data = &max_lock_depth, | |
2528 | .maxlen = sizeof(int), | |
2529 | .mode = 0644, | |
2530 | .proc_handler = proc_dointvec, | |
2531 | }, | |
2532 | #endif | |
2533 | { | |
2534 | .procname = "poweroff_cmd", | |
2535 | .data = &poweroff_cmd, | |
2536 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
2537 | .mode = 0644, | |
2538 | .proc_handler = proc_dostring, | |
2539 | }, | |
2540 | #ifdef CONFIG_KEYS | |
2541 | { | |
2542 | .procname = "keys", | |
2543 | .mode = 0555, | |
2544 | .child = key_sysctls, | |
2545 | }, | |
2546 | #endif | |
2547 | #ifdef CONFIG_PERF_EVENTS | |
2548 | /* | |
2549 | * User-space scripts rely on the existence of this file | |
2550 | * as a feature check for perf_events being enabled. | |
2551 | * | |
2552 | * So it's an ABI, do not remove! | |
2553 | */ | |
2554 | { | |
2555 | .procname = "perf_event_paranoid", | |
2556 | .data = &sysctl_perf_event_paranoid, | |
2557 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
2558 | .mode = 0644, | |
2559 | .proc_handler = proc_dointvec, | |
2560 | }, | |
2561 | { | |
2562 | .procname = "perf_event_mlock_kb", | |
2563 | .data = &sysctl_perf_event_mlock, | |
2564 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
2565 | .mode = 0644, | |
2566 | .proc_handler = proc_dointvec, | |
2567 | }, | |
2568 | { | |
2569 | .procname = "perf_event_max_sample_rate", | |
2570 | .data = &sysctl_perf_event_sample_rate, | |
2571 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
2572 | .mode = 0644, | |
2573 | .proc_handler = perf_proc_update_handler, | |
2574 | .extra1 = SYSCTL_ONE, | |
2575 | }, | |
2576 | { | |
2577 | .procname = "perf_cpu_time_max_percent", | |
2578 | .data = &sysctl_perf_cpu_time_max_percent, | |
2579 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
2580 | .mode = 0644, | |
2581 | .proc_handler = perf_cpu_time_max_percent_handler, | |
2582 | .extra1 = SYSCTL_ZERO, | |
2583 | .extra2 = &one_hundred, | |
2584 | }, | |
2585 | { | |
2586 | .procname = "perf_event_max_stack", | |
2587 | .data = &sysctl_perf_event_max_stack, | |
2588 | .maxlen = sizeof(sysctl_perf_event_max_stack), | |
2589 | .mode = 0644, | |
2590 | .proc_handler = perf_event_max_stack_handler, | |
2591 | .extra1 = SYSCTL_ZERO, | |
2592 | .extra2 = &six_hundred_forty_kb, | |
2593 | }, | |
2594 | { | |
2595 | .procname = "perf_event_max_contexts_per_stack", | |
2596 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
2597 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
2598 | .mode = 0644, | |
2599 | .proc_handler = perf_event_max_stack_handler, | |
2600 | .extra1 = SYSCTL_ZERO, | |
2601 | .extra2 = &one_thousand, | |
2602 | }, | |
2603 | #endif | |
2604 | { | |
2605 | .procname = "panic_on_warn", | |
2606 | .data = &panic_on_warn, | |
2607 | .maxlen = sizeof(int), | |
2608 | .mode = 0644, | |
2609 | .proc_handler = proc_dointvec_minmax, | |
2610 | .extra1 = SYSCTL_ZERO, | |
2611 | .extra2 = SYSCTL_ONE, | |
2612 | }, | |
2613 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) | |
2614 | { | |
2615 | .procname = "timer_migration", | |
2616 | .data = &sysctl_timer_migration, | |
2617 | .maxlen = sizeof(unsigned int), | |
2618 | .mode = 0644, | |
2619 | .proc_handler = timer_migration_handler, | |
2620 | .extra1 = SYSCTL_ZERO, | |
2621 | .extra2 = SYSCTL_ONE, | |
2622 | }, | |
2623 | #endif | |
2624 | #ifdef CONFIG_BPF_SYSCALL | |
2625 | { | |
2626 | .procname = "unprivileged_bpf_disabled", | |
2627 | .data = &sysctl_unprivileged_bpf_disabled, | |
2628 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
2629 | .mode = 0644, | |
2630 | /* only handle a transition from default "0" to "1" */ | |
2631 | .proc_handler = proc_dointvec_minmax, | |
2632 | .extra1 = SYSCTL_ONE, | |
2633 | .extra2 = SYSCTL_ONE, | |
2634 | }, | |
2635 | { | |
2636 | .procname = "bpf_stats_enabled", | |
2637 | .data = &bpf_stats_enabled_key.key, | |
2638 | .maxlen = sizeof(bpf_stats_enabled_key), | |
2639 | .mode = 0644, | |
d46edd67 | 2640 | .proc_handler = bpf_stats_handler, |
f461d2dc CH |
2641 | }, |
2642 | #endif | |
2643 | #if defined(CONFIG_TREE_RCU) | |
2644 | { | |
2645 | .procname = "panic_on_rcu_stall", | |
2646 | .data = &sysctl_panic_on_rcu_stall, | |
2647 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
2648 | .mode = 0644, | |
2649 | .proc_handler = proc_dointvec_minmax, | |
2650 | .extra1 = SYSCTL_ZERO, | |
2651 | .extra2 = SYSCTL_ONE, | |
2652 | }, | |
2653 | #endif | |
2654 | #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE | |
2655 | { | |
2656 | .procname = "stack_erasing", | |
2657 | .data = NULL, | |
2658 | .maxlen = sizeof(int), | |
2659 | .mode = 0600, | |
2660 | .proc_handler = stack_erasing_sysctl, | |
2661 | .extra1 = SYSCTL_ZERO, | |
2662 | .extra2 = SYSCTL_ONE, | |
2663 | }, | |
2664 | #endif | |
2665 | { } | |
2666 | }; | |
1da177e4 | 2667 | |
f461d2dc CH |
2668 | static struct ctl_table vm_table[] = { |
2669 | { | |
2670 | .procname = "overcommit_memory", | |
2671 | .data = &sysctl_overcommit_memory, | |
2672 | .maxlen = sizeof(sysctl_overcommit_memory), | |
2673 | .mode = 0644, | |
56f3547b | 2674 | .proc_handler = overcommit_policy_handler, |
f461d2dc CH |
2675 | .extra1 = SYSCTL_ZERO, |
2676 | .extra2 = &two, | |
2677 | }, | |
2678 | { | |
2679 | .procname = "panic_on_oom", | |
2680 | .data = &sysctl_panic_on_oom, | |
2681 | .maxlen = sizeof(sysctl_panic_on_oom), | |
2682 | .mode = 0644, | |
2683 | .proc_handler = proc_dointvec_minmax, | |
2684 | .extra1 = SYSCTL_ZERO, | |
2685 | .extra2 = &two, | |
2686 | }, | |
2687 | { | |
2688 | .procname = "oom_kill_allocating_task", | |
2689 | .data = &sysctl_oom_kill_allocating_task, | |
2690 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
2691 | .mode = 0644, | |
2692 | .proc_handler = proc_dointvec, | |
2693 | }, | |
2694 | { | |
2695 | .procname = "oom_dump_tasks", | |
2696 | .data = &sysctl_oom_dump_tasks, | |
2697 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
2698 | .mode = 0644, | |
2699 | .proc_handler = proc_dointvec, | |
2700 | }, | |
2701 | { | |
2702 | .procname = "overcommit_ratio", | |
2703 | .data = &sysctl_overcommit_ratio, | |
2704 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
2705 | .mode = 0644, | |
2706 | .proc_handler = overcommit_ratio_handler, | |
2707 | }, | |
2708 | { | |
2709 | .procname = "overcommit_kbytes", | |
2710 | .data = &sysctl_overcommit_kbytes, | |
2711 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
2712 | .mode = 0644, | |
2713 | .proc_handler = overcommit_kbytes_handler, | |
2714 | }, | |
2715 | { | |
2716 | .procname = "page-cluster", | |
2717 | .data = &page_cluster, | |
2718 | .maxlen = sizeof(int), | |
2719 | .mode = 0644, | |
2720 | .proc_handler = proc_dointvec_minmax, | |
2721 | .extra1 = SYSCTL_ZERO, | |
2722 | }, | |
2723 | { | |
2724 | .procname = "dirty_background_ratio", | |
2725 | .data = &dirty_background_ratio, | |
2726 | .maxlen = sizeof(dirty_background_ratio), | |
2727 | .mode = 0644, | |
2728 | .proc_handler = dirty_background_ratio_handler, | |
2729 | .extra1 = SYSCTL_ZERO, | |
2730 | .extra2 = &one_hundred, | |
2731 | }, | |
2732 | { | |
2733 | .procname = "dirty_background_bytes", | |
2734 | .data = &dirty_background_bytes, | |
2735 | .maxlen = sizeof(dirty_background_bytes), | |
2736 | .mode = 0644, | |
2737 | .proc_handler = dirty_background_bytes_handler, | |
2738 | .extra1 = &one_ul, | |
2739 | }, | |
2740 | { | |
2741 | .procname = "dirty_ratio", | |
2742 | .data = &vm_dirty_ratio, | |
2743 | .maxlen = sizeof(vm_dirty_ratio), | |
2744 | .mode = 0644, | |
2745 | .proc_handler = dirty_ratio_handler, | |
2746 | .extra1 = SYSCTL_ZERO, | |
2747 | .extra2 = &one_hundred, | |
2748 | }, | |
2749 | { | |
2750 | .procname = "dirty_bytes", | |
2751 | .data = &vm_dirty_bytes, | |
2752 | .maxlen = sizeof(vm_dirty_bytes), | |
2753 | .mode = 0644, | |
2754 | .proc_handler = dirty_bytes_handler, | |
2755 | .extra1 = &dirty_bytes_min, | |
2756 | }, | |
2757 | { | |
2758 | .procname = "dirty_writeback_centisecs", | |
2759 | .data = &dirty_writeback_interval, | |
2760 | .maxlen = sizeof(dirty_writeback_interval), | |
2761 | .mode = 0644, | |
2762 | .proc_handler = dirty_writeback_centisecs_handler, | |
2763 | }, | |
2764 | { | |
2765 | .procname = "dirty_expire_centisecs", | |
2766 | .data = &dirty_expire_interval, | |
2767 | .maxlen = sizeof(dirty_expire_interval), | |
2768 | .mode = 0644, | |
2769 | .proc_handler = proc_dointvec_minmax, | |
2770 | .extra1 = SYSCTL_ZERO, | |
2771 | }, | |
2772 | { | |
2773 | .procname = "dirtytime_expire_seconds", | |
2774 | .data = &dirtytime_expire_interval, | |
2775 | .maxlen = sizeof(dirtytime_expire_interval), | |
2776 | .mode = 0644, | |
2777 | .proc_handler = dirtytime_interval_handler, | |
2778 | .extra1 = SYSCTL_ZERO, | |
2779 | }, | |
2780 | { | |
2781 | .procname = "swappiness", | |
2782 | .data = &vm_swappiness, | |
2783 | .maxlen = sizeof(vm_swappiness), | |
2784 | .mode = 0644, | |
2785 | .proc_handler = proc_dointvec_minmax, | |
2786 | .extra1 = SYSCTL_ZERO, | |
ee01c4d7 | 2787 | .extra2 = &two_hundred, |
f461d2dc CH |
2788 | }, |
2789 | #ifdef CONFIG_HUGETLB_PAGE | |
2790 | { | |
2791 | .procname = "nr_hugepages", | |
2792 | .data = NULL, | |
2793 | .maxlen = sizeof(unsigned long), | |
2794 | .mode = 0644, | |
2795 | .proc_handler = hugetlb_sysctl_handler, | |
2796 | }, | |
2797 | #ifdef CONFIG_NUMA | |
2798 | { | |
2799 | .procname = "nr_hugepages_mempolicy", | |
2800 | .data = NULL, | |
2801 | .maxlen = sizeof(unsigned long), | |
2802 | .mode = 0644, | |
2803 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
2804 | }, | |
2805 | { | |
2806 | .procname = "numa_stat", | |
2807 | .data = &sysctl_vm_numa_stat, | |
2808 | .maxlen = sizeof(int), | |
2809 | .mode = 0644, | |
2810 | .proc_handler = sysctl_vm_numa_stat_handler, | |
2811 | .extra1 = SYSCTL_ZERO, | |
2812 | .extra2 = SYSCTL_ONE, | |
2813 | }, | |
2814 | #endif | |
2815 | { | |
2816 | .procname = "hugetlb_shm_group", | |
2817 | .data = &sysctl_hugetlb_shm_group, | |
2818 | .maxlen = sizeof(gid_t), | |
2819 | .mode = 0644, | |
2820 | .proc_handler = proc_dointvec, | |
2821 | }, | |
2822 | { | |
2823 | .procname = "nr_overcommit_hugepages", | |
2824 | .data = NULL, | |
2825 | .maxlen = sizeof(unsigned long), | |
2826 | .mode = 0644, | |
2827 | .proc_handler = hugetlb_overcommit_handler, | |
2828 | }, | |
2829 | #endif | |
2830 | { | |
2831 | .procname = "lowmem_reserve_ratio", | |
2832 | .data = &sysctl_lowmem_reserve_ratio, | |
2833 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
2834 | .mode = 0644, | |
2835 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, | |
2836 | }, | |
2837 | { | |
2838 | .procname = "drop_caches", | |
2839 | .data = &sysctl_drop_caches, | |
2840 | .maxlen = sizeof(int), | |
2841 | .mode = 0200, | |
2842 | .proc_handler = drop_caches_sysctl_handler, | |
2843 | .extra1 = SYSCTL_ONE, | |
2844 | .extra2 = &four, | |
2845 | }, | |
2846 | #ifdef CONFIG_COMPACTION | |
2847 | { | |
2848 | .procname = "compact_memory", | |
2849 | .data = &sysctl_compact_memory, | |
2850 | .maxlen = sizeof(int), | |
2851 | .mode = 0200, | |
2852 | .proc_handler = sysctl_compaction_handler, | |
2853 | }, | |
facdaa91 NG |
2854 | { |
2855 | .procname = "compaction_proactiveness", | |
2856 | .data = &sysctl_compaction_proactiveness, | |
d34c0a75 | 2857 | .maxlen = sizeof(sysctl_compaction_proactiveness), |
facdaa91 NG |
2858 | .mode = 0644, |
2859 | .proc_handler = proc_dointvec_minmax, | |
2860 | .extra1 = SYSCTL_ZERO, | |
2861 | .extra2 = &one_hundred, | |
2862 | }, | |
f461d2dc CH |
2863 | { |
2864 | .procname = "extfrag_threshold", | |
2865 | .data = &sysctl_extfrag_threshold, | |
2866 | .maxlen = sizeof(int), | |
2867 | .mode = 0644, | |
2868 | .proc_handler = proc_dointvec_minmax, | |
2869 | .extra1 = &min_extfrag_threshold, | |
2870 | .extra2 = &max_extfrag_threshold, | |
2871 | }, | |
2872 | { | |
2873 | .procname = "compact_unevictable_allowed", | |
2874 | .data = &sysctl_compact_unevictable_allowed, | |
2875 | .maxlen = sizeof(int), | |
2876 | .mode = 0644, | |
2877 | .proc_handler = proc_dointvec_minmax_warn_RT_change, | |
2878 | .extra1 = SYSCTL_ZERO, | |
2879 | .extra2 = SYSCTL_ONE, | |
2880 | }, | |
1da177e4 | 2881 | |
f461d2dc CH |
2882 | #endif /* CONFIG_COMPACTION */ |
2883 | { | |
2884 | .procname = "min_free_kbytes", | |
2885 | .data = &min_free_kbytes, | |
2886 | .maxlen = sizeof(min_free_kbytes), | |
2887 | .mode = 0644, | |
2888 | .proc_handler = min_free_kbytes_sysctl_handler, | |
2889 | .extra1 = SYSCTL_ZERO, | |
2890 | }, | |
2891 | { | |
2892 | .procname = "watermark_boost_factor", | |
2893 | .data = &watermark_boost_factor, | |
2894 | .maxlen = sizeof(watermark_boost_factor), | |
2895 | .mode = 0644, | |
2896 | .proc_handler = proc_dointvec_minmax, | |
2897 | .extra1 = SYSCTL_ZERO, | |
2898 | }, | |
2899 | { | |
2900 | .procname = "watermark_scale_factor", | |
2901 | .data = &watermark_scale_factor, | |
2902 | .maxlen = sizeof(watermark_scale_factor), | |
2903 | .mode = 0644, | |
2904 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
2905 | .extra1 = SYSCTL_ONE, | |
2906 | .extra2 = &one_thousand, | |
2907 | }, | |
2908 | { | |
2909 | .procname = "percpu_pagelist_fraction", | |
2910 | .data = &percpu_pagelist_fraction, | |
2911 | .maxlen = sizeof(percpu_pagelist_fraction), | |
2912 | .mode = 0644, | |
2913 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, | |
2914 | .extra1 = SYSCTL_ZERO, | |
2915 | }, | |
2916 | #ifdef CONFIG_MMU | |
2917 | { | |
2918 | .procname = "max_map_count", | |
2919 | .data = &sysctl_max_map_count, | |
2920 | .maxlen = sizeof(sysctl_max_map_count), | |
2921 | .mode = 0644, | |
2922 | .proc_handler = proc_dointvec_minmax, | |
2923 | .extra1 = SYSCTL_ZERO, | |
2924 | }, | |
2925 | #else | |
2926 | { | |
2927 | .procname = "nr_trim_pages", | |
2928 | .data = &sysctl_nr_trim_pages, | |
2929 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
2930 | .mode = 0644, | |
2931 | .proc_handler = proc_dointvec_minmax, | |
2932 | .extra1 = SYSCTL_ZERO, | |
2933 | }, | |
2934 | #endif | |
2935 | { | |
2936 | .procname = "laptop_mode", | |
2937 | .data = &laptop_mode, | |
2938 | .maxlen = sizeof(laptop_mode), | |
2939 | .mode = 0644, | |
2940 | .proc_handler = proc_dointvec_jiffies, | |
2941 | }, | |
2942 | { | |
2943 | .procname = "block_dump", | |
2944 | .data = &block_dump, | |
2945 | .maxlen = sizeof(block_dump), | |
2946 | .mode = 0644, | |
2947 | .proc_handler = proc_dointvec, | |
2948 | .extra1 = SYSCTL_ZERO, | |
2949 | }, | |
2950 | { | |
2951 | .procname = "vfs_cache_pressure", | |
2952 | .data = &sysctl_vfs_cache_pressure, | |
2953 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
2954 | .mode = 0644, | |
2955 | .proc_handler = proc_dointvec, | |
2956 | .extra1 = SYSCTL_ZERO, | |
2957 | }, | |
2958 | #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \ | |
2959 | defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) | |
2960 | { | |
2961 | .procname = "legacy_va_layout", | |
2962 | .data = &sysctl_legacy_va_layout, | |
2963 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
2964 | .mode = 0644, | |
2965 | .proc_handler = proc_dointvec, | |
2966 | .extra1 = SYSCTL_ZERO, | |
2967 | }, | |
2968 | #endif | |
2969 | #ifdef CONFIG_NUMA | |
2970 | { | |
2971 | .procname = "zone_reclaim_mode", | |
2972 | .data = &node_reclaim_mode, | |
2973 | .maxlen = sizeof(node_reclaim_mode), | |
2974 | .mode = 0644, | |
2975 | .proc_handler = proc_dointvec, | |
2976 | .extra1 = SYSCTL_ZERO, | |
2977 | }, | |
2978 | { | |
2979 | .procname = "min_unmapped_ratio", | |
2980 | .data = &sysctl_min_unmapped_ratio, | |
2981 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
2982 | .mode = 0644, | |
2983 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, | |
2984 | .extra1 = SYSCTL_ZERO, | |
2985 | .extra2 = &one_hundred, | |
2986 | }, | |
2987 | { | |
2988 | .procname = "min_slab_ratio", | |
2989 | .data = &sysctl_min_slab_ratio, | |
2990 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
2991 | .mode = 0644, | |
2992 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, | |
2993 | .extra1 = SYSCTL_ZERO, | |
2994 | .extra2 = &one_hundred, | |
2995 | }, | |
2996 | #endif | |
2997 | #ifdef CONFIG_SMP | |
2998 | { | |
2999 | .procname = "stat_interval", | |
3000 | .data = &sysctl_stat_interval, | |
3001 | .maxlen = sizeof(sysctl_stat_interval), | |
3002 | .mode = 0644, | |
3003 | .proc_handler = proc_dointvec_jiffies, | |
3004 | }, | |
3005 | { | |
3006 | .procname = "stat_refresh", | |
3007 | .data = NULL, | |
3008 | .maxlen = 0, | |
3009 | .mode = 0600, | |
3010 | .proc_handler = vmstat_refresh, | |
3011 | }, | |
3012 | #endif | |
3013 | #ifdef CONFIG_MMU | |
3014 | { | |
3015 | .procname = "mmap_min_addr", | |
3016 | .data = &dac_mmap_min_addr, | |
3017 | .maxlen = sizeof(unsigned long), | |
3018 | .mode = 0644, | |
3019 | .proc_handler = mmap_min_addr_handler, | |
3020 | }, | |
3021 | #endif | |
3022 | #ifdef CONFIG_NUMA | |
3023 | { | |
3024 | .procname = "numa_zonelist_order", | |
3025 | .data = &numa_zonelist_order, | |
3026 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
3027 | .mode = 0644, | |
3028 | .proc_handler = numa_zonelist_order_handler, | |
3029 | }, | |
3030 | #endif | |
3031 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ | |
3032 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) | |
3033 | { | |
3034 | .procname = "vdso_enabled", | |
3035 | #ifdef CONFIG_X86_32 | |
3036 | .data = &vdso32_enabled, | |
3037 | .maxlen = sizeof(vdso32_enabled), | |
3038 | #else | |
3039 | .data = &vdso_enabled, | |
3040 | .maxlen = sizeof(vdso_enabled), | |
3041 | #endif | |
3042 | .mode = 0644, | |
3043 | .proc_handler = proc_dointvec, | |
3044 | .extra1 = SYSCTL_ZERO, | |
3045 | }, | |
3046 | #endif | |
3047 | #ifdef CONFIG_HIGHMEM | |
3048 | { | |
3049 | .procname = "highmem_is_dirtyable", | |
3050 | .data = &vm_highmem_is_dirtyable, | |
3051 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
3052 | .mode = 0644, | |
3053 | .proc_handler = proc_dointvec_minmax, | |
3054 | .extra1 = SYSCTL_ZERO, | |
3055 | .extra2 = SYSCTL_ONE, | |
3056 | }, | |
3057 | #endif | |
3058 | #ifdef CONFIG_MEMORY_FAILURE | |
3059 | { | |
3060 | .procname = "memory_failure_early_kill", | |
3061 | .data = &sysctl_memory_failure_early_kill, | |
3062 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
3063 | .mode = 0644, | |
3064 | .proc_handler = proc_dointvec_minmax, | |
3065 | .extra1 = SYSCTL_ZERO, | |
3066 | .extra2 = SYSCTL_ONE, | |
3067 | }, | |
3068 | { | |
3069 | .procname = "memory_failure_recovery", | |
3070 | .data = &sysctl_memory_failure_recovery, | |
3071 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
3072 | .mode = 0644, | |
3073 | .proc_handler = proc_dointvec_minmax, | |
3074 | .extra1 = SYSCTL_ZERO, | |
3075 | .extra2 = SYSCTL_ONE, | |
3076 | }, | |
3077 | #endif | |
3078 | { | |
3079 | .procname = "user_reserve_kbytes", | |
3080 | .data = &sysctl_user_reserve_kbytes, | |
3081 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
3082 | .mode = 0644, | |
3083 | .proc_handler = proc_doulongvec_minmax, | |
3084 | }, | |
3085 | { | |
3086 | .procname = "admin_reserve_kbytes", | |
3087 | .data = &sysctl_admin_reserve_kbytes, | |
3088 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
3089 | .mode = 0644, | |
3090 | .proc_handler = proc_doulongvec_minmax, | |
3091 | }, | |
3092 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS | |
3093 | { | |
3094 | .procname = "mmap_rnd_bits", | |
3095 | .data = &mmap_rnd_bits, | |
3096 | .maxlen = sizeof(mmap_rnd_bits), | |
3097 | .mode = 0600, | |
3098 | .proc_handler = proc_dointvec_minmax, | |
3099 | .extra1 = (void *)&mmap_rnd_bits_min, | |
3100 | .extra2 = (void *)&mmap_rnd_bits_max, | |
3101 | }, | |
3102 | #endif | |
3103 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
3104 | { | |
3105 | .procname = "mmap_rnd_compat_bits", | |
3106 | .data = &mmap_rnd_compat_bits, | |
3107 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
3108 | .mode = 0600, | |
3109 | .proc_handler = proc_dointvec_minmax, | |
3110 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
3111 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
3112 | }, | |
3113 | #endif | |
3114 | #ifdef CONFIG_USERFAULTFD | |
3115 | { | |
3116 | .procname = "unprivileged_userfaultfd", | |
3117 | .data = &sysctl_unprivileged_userfaultfd, | |
3118 | .maxlen = sizeof(sysctl_unprivileged_userfaultfd), | |
3119 | .mode = 0644, | |
3120 | .proc_handler = proc_dointvec_minmax, | |
3121 | .extra1 = SYSCTL_ZERO, | |
3122 | .extra2 = SYSCTL_ONE, | |
3123 | }, | |
3124 | #endif | |
3125 | { } | |
3126 | }; | |
1da177e4 | 3127 | |
f461d2dc CH |
3128 | static struct ctl_table fs_table[] = { |
3129 | { | |
3130 | .procname = "inode-nr", | |
3131 | .data = &inodes_stat, | |
3132 | .maxlen = 2*sizeof(long), | |
3133 | .mode = 0444, | |
3134 | .proc_handler = proc_nr_inodes, | |
3135 | }, | |
3136 | { | |
3137 | .procname = "inode-state", | |
3138 | .data = &inodes_stat, | |
3139 | .maxlen = 7*sizeof(long), | |
3140 | .mode = 0444, | |
3141 | .proc_handler = proc_nr_inodes, | |
3142 | }, | |
3143 | { | |
3144 | .procname = "file-nr", | |
3145 | .data = &files_stat, | |
3146 | .maxlen = sizeof(files_stat), | |
3147 | .mode = 0444, | |
3148 | .proc_handler = proc_nr_files, | |
3149 | }, | |
3150 | { | |
3151 | .procname = "file-max", | |
3152 | .data = &files_stat.max_files, | |
3153 | .maxlen = sizeof(files_stat.max_files), | |
3154 | .mode = 0644, | |
3155 | .proc_handler = proc_doulongvec_minmax, | |
3156 | .extra1 = &zero_ul, | |
3157 | .extra2 = &long_max, | |
3158 | }, | |
3159 | { | |
3160 | .procname = "nr_open", | |
3161 | .data = &sysctl_nr_open, | |
3162 | .maxlen = sizeof(unsigned int), | |
3163 | .mode = 0644, | |
3164 | .proc_handler = proc_dointvec_minmax, | |
3165 | .extra1 = &sysctl_nr_open_min, | |
3166 | .extra2 = &sysctl_nr_open_max, | |
3167 | }, | |
3168 | { | |
3169 | .procname = "dentry-state", | |
3170 | .data = &dentry_stat, | |
3171 | .maxlen = 6*sizeof(long), | |
3172 | .mode = 0444, | |
3173 | .proc_handler = proc_nr_dentry, | |
3174 | }, | |
3175 | { | |
3176 | .procname = "overflowuid", | |
3177 | .data = &fs_overflowuid, | |
3178 | .maxlen = sizeof(int), | |
3179 | .mode = 0644, | |
3180 | .proc_handler = proc_dointvec_minmax, | |
3181 | .extra1 = &minolduid, | |
3182 | .extra2 = &maxolduid, | |
3183 | }, | |
3184 | { | |
3185 | .procname = "overflowgid", | |
3186 | .data = &fs_overflowgid, | |
3187 | .maxlen = sizeof(int), | |
3188 | .mode = 0644, | |
3189 | .proc_handler = proc_dointvec_minmax, | |
3190 | .extra1 = &minolduid, | |
3191 | .extra2 = &maxolduid, | |
3192 | }, | |
3193 | #ifdef CONFIG_FILE_LOCKING | |
3194 | { | |
3195 | .procname = "leases-enable", | |
3196 | .data = &leases_enable, | |
3197 | .maxlen = sizeof(int), | |
3198 | .mode = 0644, | |
3199 | .proc_handler = proc_dointvec, | |
3200 | }, | |
3201 | #endif | |
3202 | #ifdef CONFIG_DNOTIFY | |
3203 | { | |
3204 | .procname = "dir-notify-enable", | |
3205 | .data = &dir_notify_enable, | |
3206 | .maxlen = sizeof(int), | |
3207 | .mode = 0644, | |
3208 | .proc_handler = proc_dointvec, | |
3209 | }, | |
3210 | #endif | |
3211 | #ifdef CONFIG_MMU | |
3212 | #ifdef CONFIG_FILE_LOCKING | |
3213 | { | |
3214 | .procname = "lease-break-time", | |
3215 | .data = &lease_break_time, | |
3216 | .maxlen = sizeof(int), | |
3217 | .mode = 0644, | |
3218 | .proc_handler = proc_dointvec, | |
3219 | }, | |
3220 | #endif | |
3221 | #ifdef CONFIG_AIO | |
3222 | { | |
3223 | .procname = "aio-nr", | |
3224 | .data = &aio_nr, | |
3225 | .maxlen = sizeof(aio_nr), | |
3226 | .mode = 0444, | |
3227 | .proc_handler = proc_doulongvec_minmax, | |
3228 | }, | |
3229 | { | |
3230 | .procname = "aio-max-nr", | |
3231 | .data = &aio_max_nr, | |
3232 | .maxlen = sizeof(aio_max_nr), | |
3233 | .mode = 0644, | |
3234 | .proc_handler = proc_doulongvec_minmax, | |
3235 | }, | |
3236 | #endif /* CONFIG_AIO */ | |
3237 | #ifdef CONFIG_INOTIFY_USER | |
3238 | { | |
3239 | .procname = "inotify", | |
3240 | .mode = 0555, | |
3241 | .child = inotify_table, | |
3242 | }, | |
3243 | #endif | |
3244 | #ifdef CONFIG_EPOLL | |
3245 | { | |
3246 | .procname = "epoll", | |
3247 | .mode = 0555, | |
3248 | .child = epoll_table, | |
3249 | }, | |
3250 | #endif | |
3251 | #endif | |
3252 | { | |
3253 | .procname = "protected_symlinks", | |
3254 | .data = &sysctl_protected_symlinks, | |
3255 | .maxlen = sizeof(int), | |
3256 | .mode = 0600, | |
3257 | .proc_handler = proc_dointvec_minmax, | |
3258 | .extra1 = SYSCTL_ZERO, | |
3259 | .extra2 = SYSCTL_ONE, | |
3260 | }, | |
3261 | { | |
3262 | .procname = "protected_hardlinks", | |
3263 | .data = &sysctl_protected_hardlinks, | |
3264 | .maxlen = sizeof(int), | |
3265 | .mode = 0600, | |
3266 | .proc_handler = proc_dointvec_minmax, | |
3267 | .extra1 = SYSCTL_ZERO, | |
3268 | .extra2 = SYSCTL_ONE, | |
3269 | }, | |
3270 | { | |
3271 | .procname = "protected_fifos", | |
3272 | .data = &sysctl_protected_fifos, | |
3273 | .maxlen = sizeof(int), | |
3274 | .mode = 0600, | |
3275 | .proc_handler = proc_dointvec_minmax, | |
3276 | .extra1 = SYSCTL_ZERO, | |
3277 | .extra2 = &two, | |
3278 | }, | |
3279 | { | |
3280 | .procname = "protected_regular", | |
3281 | .data = &sysctl_protected_regular, | |
3282 | .maxlen = sizeof(int), | |
3283 | .mode = 0600, | |
3284 | .proc_handler = proc_dointvec_minmax, | |
3285 | .extra1 = SYSCTL_ZERO, | |
3286 | .extra2 = &two, | |
3287 | }, | |
3288 | { | |
3289 | .procname = "suid_dumpable", | |
3290 | .data = &suid_dumpable, | |
3291 | .maxlen = sizeof(int), | |
3292 | .mode = 0644, | |
3293 | .proc_handler = proc_dointvec_minmax_coredump, | |
3294 | .extra1 = SYSCTL_ZERO, | |
3295 | .extra2 = &two, | |
3296 | }, | |
3297 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) | |
3298 | { | |
3299 | .procname = "binfmt_misc", | |
3300 | .mode = 0555, | |
3301 | .child = sysctl_mount_point, | |
3302 | }, | |
3303 | #endif | |
3304 | { | |
3305 | .procname = "pipe-max-size", | |
3306 | .data = &pipe_max_size, | |
3307 | .maxlen = sizeof(pipe_max_size), | |
3308 | .mode = 0644, | |
3309 | .proc_handler = proc_dopipe_max_size, | |
3310 | }, | |
3311 | { | |
3312 | .procname = "pipe-user-pages-hard", | |
3313 | .data = &pipe_user_pages_hard, | |
3314 | .maxlen = sizeof(pipe_user_pages_hard), | |
3315 | .mode = 0644, | |
3316 | .proc_handler = proc_doulongvec_minmax, | |
3317 | }, | |
3318 | { | |
3319 | .procname = "pipe-user-pages-soft", | |
3320 | .data = &pipe_user_pages_soft, | |
3321 | .maxlen = sizeof(pipe_user_pages_soft), | |
3322 | .mode = 0644, | |
3323 | .proc_handler = proc_doulongvec_minmax, | |
3324 | }, | |
3325 | { | |
3326 | .procname = "mount-max", | |
3327 | .data = &sysctl_mount_max, | |
3328 | .maxlen = sizeof(unsigned int), | |
3329 | .mode = 0644, | |
3330 | .proc_handler = proc_dointvec_minmax, | |
3331 | .extra1 = SYSCTL_ONE, | |
3332 | }, | |
3333 | { } | |
3334 | }; | |
1da177e4 | 3335 | |
f461d2dc CH |
3336 | static struct ctl_table debug_table[] = { |
3337 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE | |
3338 | { | |
3339 | .procname = "exception-trace", | |
3340 | .data = &show_unhandled_signals, | |
3341 | .maxlen = sizeof(int), | |
3342 | .mode = 0644, | |
3343 | .proc_handler = proc_dointvec | |
3344 | }, | |
3345 | #endif | |
3346 | #if defined(CONFIG_OPTPROBES) | |
3347 | { | |
3348 | .procname = "kprobes-optimization", | |
3349 | .data = &sysctl_kprobes_optimization, | |
3350 | .maxlen = sizeof(int), | |
3351 | .mode = 0644, | |
3352 | .proc_handler = proc_kprobes_optimization_handler, | |
3353 | .extra1 = SYSCTL_ZERO, | |
3354 | .extra2 = SYSCTL_ONE, | |
3355 | }, | |
3356 | #endif | |
3357 | { } | |
3358 | }; | |
1da177e4 | 3359 | |
f461d2dc CH |
3360 | static struct ctl_table dev_table[] = { |
3361 | { } | |
3362 | }; | |
1da177e4 | 3363 | |
f461d2dc CH |
3364 | static struct ctl_table sysctl_base_table[] = { |
3365 | { | |
3366 | .procname = "kernel", | |
3367 | .mode = 0555, | |
3368 | .child = kern_table, | |
3369 | }, | |
3370 | { | |
3371 | .procname = "vm", | |
3372 | .mode = 0555, | |
3373 | .child = vm_table, | |
3374 | }, | |
3375 | { | |
3376 | .procname = "fs", | |
3377 | .mode = 0555, | |
3378 | .child = fs_table, | |
3379 | }, | |
3380 | { | |
3381 | .procname = "debug", | |
3382 | .mode = 0555, | |
3383 | .child = debug_table, | |
3384 | }, | |
3385 | { | |
3386 | .procname = "dev", | |
3387 | .mode = 0555, | |
3388 | .child = dev_table, | |
3389 | }, | |
3390 | { } | |
3391 | }; | |
1da177e4 | 3392 | |
f461d2dc | 3393 | int __init sysctl_init(void) |
492ecee8 | 3394 | { |
f461d2dc | 3395 | struct ctl_table_header *hdr; |
492ecee8 | 3396 | |
f461d2dc CH |
3397 | hdr = register_sysctl_table(sysctl_base_table); |
3398 | kmemleak_not_leak(hdr); | |
3399 | return 0; | |
492ecee8 | 3400 | } |
f461d2dc | 3401 | #endif /* CONFIG_SYSCTL */ |
1da177e4 LT |
3402 | /* |
3403 | * No sense putting this after each symbol definition, twice, | |
3404 | * exception granted :-) | |
3405 | */ | |
3406 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 3407 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
3408 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
3409 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 3410 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
1da177e4 LT |
3411 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
3412 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3413 | EXPORT_SYMBOL(proc_dostring); | |
3414 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3415 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); | |
0bc19985 | 3416 | EXPORT_SYMBOL(proc_do_large_bitmap); |