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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 | 21 | #include <linux/module.h> |
e2e40f2c | 22 | #include <linux/aio.h> |
1da177e4 LT |
23 | #include <linux/mm.h> |
24 | #include <linux/swap.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/sysctl.h> | |
5a04cca6 | 27 | #include <linux/bitmap.h> |
d33ed52d | 28 | #include <linux/signal.h> |
455cd5ab | 29 | #include <linux/printk.h> |
1da177e4 | 30 | #include <linux/proc_fs.h> |
72c2d582 | 31 | #include <linux/security.h> |
1da177e4 | 32 | #include <linux/ctype.h> |
dfec072e | 33 | #include <linux/kmemcheck.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> |
7984754b | 66 | #include <linux/kexec.h> |
1be7f75d | 67 | #include <linux/bpf.h> |
d2921684 | 68 | #include <linux/mount.h> |
3da7fb50 | 69 | #include <linux/efi.h> |
1da177e4 | 70 | |
7c0f6ba6 | 71 | #include <linux/uaccess.h> |
1da177e4 LT |
72 | #include <asm/processor.h> |
73 | ||
29cbc78b AK |
74 | #ifdef CONFIG_X86 |
75 | #include <asm/nmi.h> | |
0741f4d2 | 76 | #include <asm/stacktrace.h> |
6e7c4025 | 77 | #include <asm/io.h> |
29cbc78b | 78 | #endif |
d550bbd4 DH |
79 | #ifdef CONFIG_SPARC |
80 | #include <asm/setup.h> | |
81 | #endif | |
c55b7c3e DY |
82 | #ifdef CONFIG_BSD_PROCESS_ACCT |
83 | #include <linux/acct.h> | |
84 | #endif | |
4f0e056f DY |
85 | #ifdef CONFIG_RT_MUTEXES |
86 | #include <linux/rtmutex.h> | |
87 | #endif | |
2edf5e49 DY |
88 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
89 | #include <linux/lockdep.h> | |
90 | #endif | |
15485a46 DY |
91 | #ifdef CONFIG_CHR_DEV_SG |
92 | #include <scsi/sg.h> | |
93 | #endif | |
29cbc78b | 94 | |
58687acb | 95 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
96 | #include <linux/nmi.h> |
97 | #endif | |
98 | ||
1da177e4 LT |
99 | #if defined(CONFIG_SYSCTL) |
100 | ||
101 | /* External variables not in a header file. */ | |
d6e71144 | 102 | extern int suid_dumpable; |
046d662f AK |
103 | #ifdef CONFIG_COREDUMP |
104 | extern int core_uses_pid; | |
1da177e4 | 105 | extern char core_pattern[]; |
a293980c | 106 | extern unsigned int core_pipe_limit; |
046d662f | 107 | #endif |
c8f50ae1 SH |
108 | #ifdef CONFIG_USER_NS |
109 | extern int unprivileged_userns_clone; | |
110 | #endif | |
1da177e4 | 111 | extern int pid_max; |
1da177e4 | 112 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 113 | extern int percpu_pagelist_fraction; |
9745512c | 114 | extern int latencytop_enabled; |
9b80a184 | 115 | extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
116 | #ifndef CONFIG_MMU |
117 | extern int sysctl_nr_trim_pages; | |
118 | #endif | |
1da177e4 | 119 | |
c4f3b63f | 120 | /* Constants used for minimum and maximum */ |
2508ce18 | 121 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
122 | static int sixty = 60; |
123 | #endif | |
124 | ||
270750db AT |
125 | static int __maybe_unused neg_one = -1; |
126 | ||
c4f3b63f | 127 | static int zero; |
cd5f9a4c LT |
128 | static int __maybe_unused one = 1; |
129 | static int __maybe_unused two = 2; | |
5509a5d2 | 130 | static int __maybe_unused four = 4; |
fc3501d4 | 131 | static unsigned long one_ul = 1; |
c4f3b63f | 132 | static int one_hundred = 100; |
795ae7a0 | 133 | static int one_thousand = 1000; |
af91322e DY |
134 | #ifdef CONFIG_PRINTK |
135 | static int ten_thousand = 10000; | |
136 | #endif | |
c5dfd78e ACM |
137 | #ifdef CONFIG_PERF_EVENTS |
138 | static int six_hundred_forty_kb = 640 * 1024; | |
139 | #endif | |
c4f3b63f | 140 | |
9e4a5bda AR |
141 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
142 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
143 | ||
1da177e4 LT |
144 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
145 | static int maxolduid = 65535; | |
146 | static int minolduid; | |
147 | ||
148 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 149 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 150 | |
80df2847 LH |
151 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
152 | #ifdef CONFIG_DETECT_HUNG_TASK | |
153 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
154 | #endif | |
155 | ||
d14f1729 DY |
156 | #ifdef CONFIG_INOTIFY_USER |
157 | #include <linux/inotify.h> | |
158 | #endif | |
72c57ed5 | 159 | #ifdef CONFIG_SPARC |
1da177e4 LT |
160 | #endif |
161 | ||
162 | #ifdef __hppa__ | |
163 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
164 | #endif |
165 | ||
166 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
167 | extern int unaligned_enabled; |
168 | #endif | |
1da177e4 | 169 | |
d2b176ed | 170 | #ifdef CONFIG_IA64 |
88fc241f | 171 | extern int unaligned_dump_stack; |
d2b176ed JS |
172 | #endif |
173 | ||
b6fca725 VG |
174 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
175 | extern int no_unaligned_warning; | |
176 | #endif | |
177 | ||
d6f8ff73 | 178 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 KC |
179 | |
180 | #define SYSCTL_WRITES_LEGACY -1 | |
181 | #define SYSCTL_WRITES_WARN 0 | |
182 | #define SYSCTL_WRITES_STRICT 1 | |
183 | ||
41662f5c | 184 | static int sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 185 | |
8d65af78 | 186 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 187 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 188 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 189 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 190 | #endif |
9ec52099 | 191 | |
bfdc0b49 | 192 | #ifdef CONFIG_PRINTK |
620f6e8e | 193 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
194 | void __user *buffer, size_t *lenp, loff_t *ppos); |
195 | #endif | |
196 | ||
54b50199 KC |
197 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
198 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 199 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
200 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
201 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 202 | #endif |
54b50199 | 203 | |
97f5f0cd | 204 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 205 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 206 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 207 | |
6f8fd1d7 | 208 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
209 | void __user *buffer, size_t *lenp, |
210 | loff_t *ppos) | |
211 | { | |
212 | int error; | |
213 | ||
214 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
215 | if (error) | |
216 | return error; | |
217 | ||
218 | if (write) | |
219 | sysrq_toggle_support(__sysrq_enabled); | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | #endif | |
225 | ||
d8217f07 EB |
226 | static struct ctl_table kern_table[]; |
227 | static struct ctl_table vm_table[]; | |
228 | static struct ctl_table fs_table[]; | |
229 | static struct ctl_table debug_table[]; | |
230 | static struct ctl_table dev_table[]; | |
231 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
232 | #ifdef CONFIG_EPOLL |
233 | extern struct ctl_table epoll_table[]; | |
234 | #endif | |
1da177e4 LT |
235 | |
236 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
237 | int sysctl_legacy_va_layout; | |
238 | #endif | |
239 | ||
1da177e4 LT |
240 | /* The default sysctl tables: */ |
241 | ||
de4e83bd | 242 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 243 | { |
1da177e4 LT |
244 | .procname = "kernel", |
245 | .mode = 0555, | |
246 | .child = kern_table, | |
247 | }, | |
248 | { | |
1da177e4 LT |
249 | .procname = "vm", |
250 | .mode = 0555, | |
251 | .child = vm_table, | |
252 | }, | |
1da177e4 | 253 | { |
1da177e4 LT |
254 | .procname = "fs", |
255 | .mode = 0555, | |
256 | .child = fs_table, | |
257 | }, | |
258 | { | |
1da177e4 LT |
259 | .procname = "debug", |
260 | .mode = 0555, | |
261 | .child = debug_table, | |
262 | }, | |
263 | { | |
1da177e4 LT |
264 | .procname = "dev", |
265 | .mode = 0555, | |
266 | .child = dev_table, | |
267 | }, | |
6fce56ec | 268 | { } |
1da177e4 LT |
269 | }; |
270 | ||
77e54a1f | 271 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
272 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
273 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
274 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
275 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 276 | #ifdef CONFIG_SMP |
1983a922 CE |
277 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
278 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
279 | #endif /* CONFIG_SMP */ |
280 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 281 | |
5e771905 MG |
282 | #ifdef CONFIG_COMPACTION |
283 | static int min_extfrag_threshold; | |
284 | static int max_extfrag_threshold = 1000; | |
285 | #endif | |
286 | ||
3da7fb50 TG |
287 | static unsigned int secure_boot_enabled; |
288 | int secure_boot_proc_handler(struct ctl_table *table, int write, | |
289 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
290 | { | |
291 | secure_boot_enabled = efi_enabled(EFI_SECURE_BOOT); | |
292 | return proc_dointvec(table, write, buffer, lenp, ppos); | |
293 | } | |
294 | ||
295 | static unsigned int moksbstate_disabled; | |
296 | int moksbstate_disabled_proc_handler(struct ctl_table *table, int write, | |
297 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
298 | { | |
299 | moksbstate_disabled = efi_enabled(EFI_MOKSBSTATE_DISABLED); | |
300 | return proc_dointvec(table, write, buffer, lenp, ppos); | |
301 | } | |
302 | ||
d8217f07 | 303 | static struct ctl_table kern_table[] = { |
3da7fb50 TG |
304 | { |
305 | .procname = "secure_boot", | |
306 | .data = &secure_boot_enabled, | |
307 | .maxlen = sizeof(unsigned int), | |
308 | .mode = 0444, | |
309 | .proc_handler = secure_boot_proc_handler, | |
310 | }, | |
311 | { | |
312 | .procname = "moksbstate_disabled", | |
313 | .data = &moksbstate_disabled, | |
314 | .maxlen = sizeof(unsigned int), | |
315 | .mode = 0444, | |
316 | .proc_handler = moksbstate_disabled_proc_handler, | |
317 | }, | |
2bba22c5 | 318 | { |
2bba22c5 MG |
319 | .procname = "sched_child_runs_first", |
320 | .data = &sysctl_sched_child_runs_first, | |
321 | .maxlen = sizeof(unsigned int), | |
322 | .mode = 0644, | |
6d456111 | 323 | .proc_handler = proc_dointvec, |
2bba22c5 | 324 | }, |
77e54a1f IM |
325 | #ifdef CONFIG_SCHED_DEBUG |
326 | { | |
b2be5e96 PZ |
327 | .procname = "sched_min_granularity_ns", |
328 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
329 | .maxlen = sizeof(unsigned int), |
330 | .mode = 0644, | |
702a7c76 | 331 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
332 | .extra1 = &min_sched_granularity_ns, |
333 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 334 | }, |
21805085 | 335 | { |
21805085 PZ |
336 | .procname = "sched_latency_ns", |
337 | .data = &sysctl_sched_latency, | |
338 | .maxlen = sizeof(unsigned int), | |
339 | .mode = 0644, | |
702a7c76 | 340 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
341 | .extra1 = &min_sched_granularity_ns, |
342 | .extra2 = &max_sched_granularity_ns, | |
343 | }, | |
77e54a1f | 344 | { |
77e54a1f IM |
345 | .procname = "sched_wakeup_granularity_ns", |
346 | .data = &sysctl_sched_wakeup_granularity, | |
347 | .maxlen = sizeof(unsigned int), | |
348 | .mode = 0644, | |
702a7c76 | 349 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
350 | .extra1 = &min_wakeup_granularity_ns, |
351 | .extra2 = &max_wakeup_granularity_ns, | |
352 | }, | |
cbee9f88 | 353 | #ifdef CONFIG_SMP |
1983a922 | 354 | { |
1983a922 CE |
355 | .procname = "sched_tunable_scaling", |
356 | .data = &sysctl_sched_tunable_scaling, | |
357 | .maxlen = sizeof(enum sched_tunable_scaling), | |
358 | .mode = 0644, | |
702a7c76 | 359 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
360 | .extra1 = &min_sched_tunable_scaling, |
361 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 362 | }, |
da84d961 | 363 | { |
d00535db | 364 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
365 | .data = &sysctl_sched_migration_cost, |
366 | .maxlen = sizeof(unsigned int), | |
367 | .mode = 0644, | |
6d456111 | 368 | .proc_handler = proc_dointvec, |
da84d961 | 369 | }, |
b82d9fdd | 370 | { |
b82d9fdd PZ |
371 | .procname = "sched_nr_migrate", |
372 | .data = &sysctl_sched_nr_migrate, | |
373 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 374 | .mode = 0644, |
6d456111 | 375 | .proc_handler = proc_dointvec, |
fa85ae24 | 376 | }, |
e9e9250b | 377 | { |
d00535db | 378 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
379 | .data = &sysctl_sched_time_avg, |
380 | .maxlen = sizeof(unsigned int), | |
381 | .mode = 0644, | |
6d456111 | 382 | .proc_handler = proc_dointvec, |
e9e9250b | 383 | }, |
cb251765 MG |
384 | #ifdef CONFIG_SCHEDSTATS |
385 | { | |
386 | .procname = "sched_schedstats", | |
387 | .data = NULL, | |
388 | .maxlen = sizeof(unsigned int), | |
389 | .mode = 0644, | |
390 | .proc_handler = sysctl_schedstats, | |
391 | .extra1 = &zero, | |
392 | .extra2 = &one, | |
393 | }, | |
394 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
395 | #endif /* CONFIG_SMP */ |
396 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
397 | { |
398 | .procname = "numa_balancing_scan_delay_ms", | |
399 | .data = &sysctl_numa_balancing_scan_delay, | |
400 | .maxlen = sizeof(unsigned int), | |
401 | .mode = 0644, | |
402 | .proc_handler = proc_dointvec, | |
403 | }, | |
cbee9f88 PZ |
404 | { |
405 | .procname = "numa_balancing_scan_period_min_ms", | |
406 | .data = &sysctl_numa_balancing_scan_period_min, | |
407 | .maxlen = sizeof(unsigned int), | |
408 | .mode = 0644, | |
409 | .proc_handler = proc_dointvec, | |
410 | }, | |
411 | { | |
412 | .procname = "numa_balancing_scan_period_max_ms", | |
413 | .data = &sysctl_numa_balancing_scan_period_max, | |
414 | .maxlen = sizeof(unsigned int), | |
415 | .mode = 0644, | |
416 | .proc_handler = proc_dointvec, | |
417 | }, | |
6e5fb223 PZ |
418 | { |
419 | .procname = "numa_balancing_scan_size_mb", | |
420 | .data = &sysctl_numa_balancing_scan_size, | |
421 | .maxlen = sizeof(unsigned int), | |
422 | .mode = 0644, | |
64192658 KT |
423 | .proc_handler = proc_dointvec_minmax, |
424 | .extra1 = &one, | |
6e5fb223 | 425 | }, |
54a43d54 AK |
426 | { |
427 | .procname = "numa_balancing", | |
428 | .data = NULL, /* filled in by handler */ | |
429 | .maxlen = sizeof(unsigned int), | |
430 | .mode = 0644, | |
431 | .proc_handler = sysctl_numa_balancing, | |
432 | .extra1 = &zero, | |
433 | .extra2 = &one, | |
434 | }, | |
cbee9f88 PZ |
435 | #endif /* CONFIG_NUMA_BALANCING */ |
436 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 437 | { |
9f0c1e56 PZ |
438 | .procname = "sched_rt_period_us", |
439 | .data = &sysctl_sched_rt_period, | |
440 | .maxlen = sizeof(unsigned int), | |
441 | .mode = 0644, | |
6d456111 | 442 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
443 | }, |
444 | { | |
9f0c1e56 PZ |
445 | .procname = "sched_rt_runtime_us", |
446 | .data = &sysctl_sched_rt_runtime, | |
447 | .maxlen = sizeof(int), | |
448 | .mode = 0644, | |
6d456111 | 449 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 450 | }, |
ce0dbbbb CW |
451 | { |
452 | .procname = "sched_rr_timeslice_ms", | |
453 | .data = &sched_rr_timeslice, | |
454 | .maxlen = sizeof(int), | |
455 | .mode = 0644, | |
456 | .proc_handler = sched_rr_handler, | |
457 | }, | |
5091faa4 MG |
458 | #ifdef CONFIG_SCHED_AUTOGROUP |
459 | { | |
460 | .procname = "sched_autogroup_enabled", | |
461 | .data = &sysctl_sched_autogroup_enabled, | |
462 | .maxlen = sizeof(unsigned int), | |
463 | .mode = 0644, | |
1747b21f | 464 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
465 | .extra1 = &zero, |
466 | .extra2 = &one, | |
467 | }, | |
468 | #endif | |
ec12cb7f PT |
469 | #ifdef CONFIG_CFS_BANDWIDTH |
470 | { | |
471 | .procname = "sched_cfs_bandwidth_slice_us", | |
472 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
473 | .maxlen = sizeof(unsigned int), | |
474 | .mode = 0644, | |
475 | .proc_handler = proc_dointvec_minmax, | |
476 | .extra1 = &one, | |
477 | }, | |
478 | #endif | |
f20786ff PZ |
479 | #ifdef CONFIG_PROVE_LOCKING |
480 | { | |
f20786ff PZ |
481 | .procname = "prove_locking", |
482 | .data = &prove_locking, | |
483 | .maxlen = sizeof(int), | |
484 | .mode = 0644, | |
6d456111 | 485 | .proc_handler = proc_dointvec, |
f20786ff PZ |
486 | }, |
487 | #endif | |
488 | #ifdef CONFIG_LOCK_STAT | |
489 | { | |
f20786ff PZ |
490 | .procname = "lock_stat", |
491 | .data = &lock_stat, | |
492 | .maxlen = sizeof(int), | |
493 | .mode = 0644, | |
6d456111 | 494 | .proc_handler = proc_dointvec, |
f20786ff | 495 | }, |
77e54a1f | 496 | #endif |
1da177e4 | 497 | { |
1da177e4 LT |
498 | .procname = "panic", |
499 | .data = &panic_timeout, | |
500 | .maxlen = sizeof(int), | |
501 | .mode = 0644, | |
6d456111 | 502 | .proc_handler = proc_dointvec, |
1da177e4 | 503 | }, |
046d662f | 504 | #ifdef CONFIG_COREDUMP |
1da177e4 | 505 | { |
1da177e4 LT |
506 | .procname = "core_uses_pid", |
507 | .data = &core_uses_pid, | |
508 | .maxlen = sizeof(int), | |
509 | .mode = 0644, | |
6d456111 | 510 | .proc_handler = proc_dointvec, |
1da177e4 LT |
511 | }, |
512 | { | |
1da177e4 LT |
513 | .procname = "core_pattern", |
514 | .data = core_pattern, | |
71ce92f3 | 515 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 516 | .mode = 0644, |
54b50199 | 517 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 518 | }, |
a293980c | 519 | { |
a293980c NH |
520 | .procname = "core_pipe_limit", |
521 | .data = &core_pipe_limit, | |
522 | .maxlen = sizeof(unsigned int), | |
523 | .mode = 0644, | |
6d456111 | 524 | .proc_handler = proc_dointvec, |
a293980c | 525 | }, |
046d662f | 526 | #endif |
c8f50ae1 SH |
527 | #ifdef CONFIG_USER_NS |
528 | { | |
529 | .procname = "unprivileged_userns_clone", | |
530 | .data = &unprivileged_userns_clone, | |
531 | .maxlen = sizeof(int), | |
532 | .mode = 0644, | |
533 | .proc_handler = proc_dointvec, | |
534 | }, | |
535 | #endif | |
34f5a398 | 536 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 537 | { |
1da177e4 | 538 | .procname = "tainted", |
25ddbb18 | 539 | .maxlen = sizeof(long), |
34f5a398 | 540 | .mode = 0644, |
6d456111 | 541 | .proc_handler = proc_taint, |
1da177e4 | 542 | }, |
f4aacea2 KC |
543 | { |
544 | .procname = "sysctl_writes_strict", | |
545 | .data = &sysctl_writes_strict, | |
546 | .maxlen = sizeof(int), | |
547 | .mode = 0644, | |
548 | .proc_handler = proc_dointvec_minmax, | |
549 | .extra1 = &neg_one, | |
550 | .extra2 = &one, | |
551 | }, | |
34f5a398 | 552 | #endif |
9745512c AV |
553 | #ifdef CONFIG_LATENCYTOP |
554 | { | |
555 | .procname = "latencytop", | |
556 | .data = &latencytop_enabled, | |
557 | .maxlen = sizeof(int), | |
558 | .mode = 0644, | |
cb251765 | 559 | .proc_handler = sysctl_latencytop, |
9745512c AV |
560 | }, |
561 | #endif | |
1da177e4 LT |
562 | #ifdef CONFIG_BLK_DEV_INITRD |
563 | { | |
1da177e4 LT |
564 | .procname = "real-root-dev", |
565 | .data = &real_root_dev, | |
566 | .maxlen = sizeof(int), | |
567 | .mode = 0644, | |
6d456111 | 568 | .proc_handler = proc_dointvec, |
1da177e4 LT |
569 | }, |
570 | #endif | |
45807a1d | 571 | { |
45807a1d IM |
572 | .procname = "print-fatal-signals", |
573 | .data = &print_fatal_signals, | |
574 | .maxlen = sizeof(int), | |
575 | .mode = 0644, | |
6d456111 | 576 | .proc_handler = proc_dointvec, |
45807a1d | 577 | }, |
72c57ed5 | 578 | #ifdef CONFIG_SPARC |
1da177e4 | 579 | { |
1da177e4 LT |
580 | .procname = "reboot-cmd", |
581 | .data = reboot_command, | |
582 | .maxlen = 256, | |
583 | .mode = 0644, | |
6d456111 | 584 | .proc_handler = proc_dostring, |
1da177e4 LT |
585 | }, |
586 | { | |
1da177e4 LT |
587 | .procname = "stop-a", |
588 | .data = &stop_a_enabled, | |
589 | .maxlen = sizeof (int), | |
590 | .mode = 0644, | |
6d456111 | 591 | .proc_handler = proc_dointvec, |
1da177e4 LT |
592 | }, |
593 | { | |
1da177e4 LT |
594 | .procname = "scons-poweroff", |
595 | .data = &scons_pwroff, | |
596 | .maxlen = sizeof (int), | |
597 | .mode = 0644, | |
6d456111 | 598 | .proc_handler = proc_dointvec, |
1da177e4 LT |
599 | }, |
600 | #endif | |
0871420f DM |
601 | #ifdef CONFIG_SPARC64 |
602 | { | |
0871420f DM |
603 | .procname = "tsb-ratio", |
604 | .data = &sysctl_tsb_ratio, | |
605 | .maxlen = sizeof (int), | |
606 | .mode = 0644, | |
6d456111 | 607 | .proc_handler = proc_dointvec, |
0871420f DM |
608 | }, |
609 | #endif | |
1da177e4 LT |
610 | #ifdef __hppa__ |
611 | { | |
1da177e4 LT |
612 | .procname = "soft-power", |
613 | .data = &pwrsw_enabled, | |
614 | .maxlen = sizeof (int), | |
615 | .mode = 0644, | |
6d456111 | 616 | .proc_handler = proc_dointvec, |
1da177e4 | 617 | }, |
bf14e3b9 VG |
618 | #endif |
619 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 620 | { |
1da177e4 LT |
621 | .procname = "unaligned-trap", |
622 | .data = &unaligned_enabled, | |
623 | .maxlen = sizeof (int), | |
624 | .mode = 0644, | |
6d456111 | 625 | .proc_handler = proc_dointvec, |
1da177e4 LT |
626 | }, |
627 | #endif | |
628 | { | |
1da177e4 LT |
629 | .procname = "ctrl-alt-del", |
630 | .data = &C_A_D, | |
631 | .maxlen = sizeof(int), | |
632 | .mode = 0644, | |
6d456111 | 633 | .proc_handler = proc_dointvec, |
1da177e4 | 634 | }, |
606576ce | 635 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 636 | { |
b0fc494f SR |
637 | .procname = "ftrace_enabled", |
638 | .data = &ftrace_enabled, | |
639 | .maxlen = sizeof(int), | |
640 | .mode = 0644, | |
6d456111 | 641 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
642 | }, |
643 | #endif | |
f38f1d2a SR |
644 | #ifdef CONFIG_STACK_TRACER |
645 | { | |
f38f1d2a SR |
646 | .procname = "stack_tracer_enabled", |
647 | .data = &stack_tracer_enabled, | |
648 | .maxlen = sizeof(int), | |
649 | .mode = 0644, | |
6d456111 | 650 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
651 | }, |
652 | #endif | |
944ac425 SR |
653 | #ifdef CONFIG_TRACING |
654 | { | |
3299b4dd | 655 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
656 | .data = &ftrace_dump_on_oops, |
657 | .maxlen = sizeof(int), | |
658 | .mode = 0644, | |
6d456111 | 659 | .proc_handler = proc_dointvec, |
944ac425 | 660 | }, |
de7edd31 SRRH |
661 | { |
662 | .procname = "traceoff_on_warning", | |
663 | .data = &__disable_trace_on_warning, | |
664 | .maxlen = sizeof(__disable_trace_on_warning), | |
665 | .mode = 0644, | |
666 | .proc_handler = proc_dointvec, | |
667 | }, | |
0daa2302 SRRH |
668 | { |
669 | .procname = "tracepoint_printk", | |
670 | .data = &tracepoint_printk, | |
671 | .maxlen = sizeof(tracepoint_printk), | |
672 | .mode = 0644, | |
42391745 | 673 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 674 | }, |
944ac425 | 675 | #endif |
2965faa5 | 676 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
677 | { |
678 | .procname = "kexec_load_disabled", | |
679 | .data = &kexec_load_disabled, | |
680 | .maxlen = sizeof(int), | |
681 | .mode = 0644, | |
682 | /* only handle a transition from default "0" to "1" */ | |
683 | .proc_handler = proc_dointvec_minmax, | |
684 | .extra1 = &one, | |
685 | .extra2 = &one, | |
686 | }, | |
687 | #endif | |
a1ef5adb | 688 | #ifdef CONFIG_MODULES |
1da177e4 | 689 | { |
1da177e4 LT |
690 | .procname = "modprobe", |
691 | .data = &modprobe_path, | |
692 | .maxlen = KMOD_PATH_LEN, | |
693 | .mode = 0644, | |
6d456111 | 694 | .proc_handler = proc_dostring, |
1da177e4 | 695 | }, |
3d43321b | 696 | { |
3d43321b KC |
697 | .procname = "modules_disabled", |
698 | .data = &modules_disabled, | |
699 | .maxlen = sizeof(int), | |
700 | .mode = 0644, | |
701 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 702 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
703 | .extra1 = &one, |
704 | .extra2 = &one, | |
705 | }, | |
1da177e4 | 706 | #endif |
86d56134 | 707 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 708 | { |
1da177e4 | 709 | .procname = "hotplug", |
312c004d KS |
710 | .data = &uevent_helper, |
711 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 712 | .mode = 0644, |
6d456111 | 713 | .proc_handler = proc_dostring, |
1da177e4 | 714 | }, |
86d56134 | 715 | #endif |
1da177e4 LT |
716 | #ifdef CONFIG_CHR_DEV_SG |
717 | { | |
1da177e4 LT |
718 | .procname = "sg-big-buff", |
719 | .data = &sg_big_buff, | |
720 | .maxlen = sizeof (int), | |
721 | .mode = 0444, | |
6d456111 | 722 | .proc_handler = proc_dointvec, |
1da177e4 LT |
723 | }, |
724 | #endif | |
725 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
726 | { | |
1da177e4 LT |
727 | .procname = "acct", |
728 | .data = &acct_parm, | |
729 | .maxlen = 3*sizeof(int), | |
730 | .mode = 0644, | |
6d456111 | 731 | .proc_handler = proc_dointvec, |
1da177e4 LT |
732 | }, |
733 | #endif | |
1da177e4 LT |
734 | #ifdef CONFIG_MAGIC_SYSRQ |
735 | { | |
1da177e4 | 736 | .procname = "sysrq", |
5d6f647f | 737 | .data = &__sysrq_enabled, |
1da177e4 LT |
738 | .maxlen = sizeof (int), |
739 | .mode = 0644, | |
97f5f0cd | 740 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
741 | }, |
742 | #endif | |
d6f8ff73 | 743 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 744 | { |
1da177e4 | 745 | .procname = "cad_pid", |
9ec52099 | 746 | .data = NULL, |
1da177e4 LT |
747 | .maxlen = sizeof (int), |
748 | .mode = 0600, | |
6d456111 | 749 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 750 | }, |
d6f8ff73 | 751 | #endif |
1da177e4 | 752 | { |
1da177e4 | 753 | .procname = "threads-max", |
16db3d3f | 754 | .data = NULL, |
1da177e4 LT |
755 | .maxlen = sizeof(int), |
756 | .mode = 0644, | |
16db3d3f | 757 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
758 | }, |
759 | { | |
1da177e4 LT |
760 | .procname = "random", |
761 | .mode = 0555, | |
762 | .child = random_table, | |
763 | }, | |
17f60a7d EP |
764 | { |
765 | .procname = "usermodehelper", | |
766 | .mode = 0555, | |
767 | .child = usermodehelper_table, | |
768 | }, | |
1da177e4 | 769 | { |
1da177e4 LT |
770 | .procname = "overflowuid", |
771 | .data = &overflowuid, | |
772 | .maxlen = sizeof(int), | |
773 | .mode = 0644, | |
6d456111 | 774 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
775 | .extra1 = &minolduid, |
776 | .extra2 = &maxolduid, | |
777 | }, | |
778 | { | |
1da177e4 LT |
779 | .procname = "overflowgid", |
780 | .data = &overflowgid, | |
781 | .maxlen = sizeof(int), | |
782 | .mode = 0644, | |
6d456111 | 783 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
784 | .extra1 = &minolduid, |
785 | .extra2 = &maxolduid, | |
786 | }, | |
347a8dc3 | 787 | #ifdef CONFIG_S390 |
1da177e4 LT |
788 | #ifdef CONFIG_MATHEMU |
789 | { | |
1da177e4 LT |
790 | .procname = "ieee_emulation_warnings", |
791 | .data = &sysctl_ieee_emulation_warnings, | |
792 | .maxlen = sizeof(int), | |
793 | .mode = 0644, | |
6d456111 | 794 | .proc_handler = proc_dointvec, |
1da177e4 | 795 | }, |
1da177e4 LT |
796 | #endif |
797 | { | |
1da177e4 | 798 | .procname = "userprocess_debug", |
ab3c68ee | 799 | .data = &show_unhandled_signals, |
1da177e4 LT |
800 | .maxlen = sizeof(int), |
801 | .mode = 0644, | |
6d456111 | 802 | .proc_handler = proc_dointvec, |
1da177e4 LT |
803 | }, |
804 | #endif | |
805 | { | |
1da177e4 LT |
806 | .procname = "pid_max", |
807 | .data = &pid_max, | |
808 | .maxlen = sizeof (int), | |
809 | .mode = 0644, | |
6d456111 | 810 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
811 | .extra1 = &pid_max_min, |
812 | .extra2 = &pid_max_max, | |
813 | }, | |
814 | { | |
1da177e4 LT |
815 | .procname = "panic_on_oops", |
816 | .data = &panic_on_oops, | |
817 | .maxlen = sizeof(int), | |
818 | .mode = 0644, | |
6d456111 | 819 | .proc_handler = proc_dointvec, |
1da177e4 | 820 | }, |
7ef3d2fd JP |
821 | #if defined CONFIG_PRINTK |
822 | { | |
7ef3d2fd JP |
823 | .procname = "printk", |
824 | .data = &console_loglevel, | |
825 | .maxlen = 4*sizeof(int), | |
826 | .mode = 0644, | |
6d456111 | 827 | .proc_handler = proc_dointvec, |
7ef3d2fd | 828 | }, |
1da177e4 | 829 | { |
1da177e4 | 830 | .procname = "printk_ratelimit", |
717115e1 | 831 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
832 | .maxlen = sizeof(int), |
833 | .mode = 0644, | |
6d456111 | 834 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
835 | }, |
836 | { | |
1da177e4 | 837 | .procname = "printk_ratelimit_burst", |
717115e1 | 838 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
839 | .maxlen = sizeof(int), |
840 | .mode = 0644, | |
6d456111 | 841 | .proc_handler = proc_dointvec, |
1da177e4 | 842 | }, |
af91322e | 843 | { |
af91322e DY |
844 | .procname = "printk_delay", |
845 | .data = &printk_delay_msec, | |
846 | .maxlen = sizeof(int), | |
847 | .mode = 0644, | |
6d456111 | 848 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
849 | .extra1 = &zero, |
850 | .extra2 = &ten_thousand, | |
851 | }, | |
750afe7b BP |
852 | { |
853 | .procname = "printk_devkmsg", | |
854 | .data = devkmsg_log_str, | |
855 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
856 | .mode = 0644, | |
857 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
858 | }, | |
eaf06b24 DR |
859 | { |
860 | .procname = "dmesg_restrict", | |
861 | .data = &dmesg_restrict, | |
862 | .maxlen = sizeof(int), | |
863 | .mode = 0644, | |
620f6e8e | 864 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
865 | .extra1 = &zero, |
866 | .extra2 = &one, | |
867 | }, | |
455cd5ab DR |
868 | { |
869 | .procname = "kptr_restrict", | |
870 | .data = &kptr_restrict, | |
871 | .maxlen = sizeof(int), | |
872 | .mode = 0644, | |
620f6e8e | 873 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
874 | .extra1 = &zero, |
875 | .extra2 = &two, | |
876 | }, | |
df6e61d4 | 877 | #endif |
1da177e4 | 878 | { |
1da177e4 LT |
879 | .procname = "ngroups_max", |
880 | .data = &ngroups_max, | |
881 | .maxlen = sizeof (int), | |
882 | .mode = 0444, | |
6d456111 | 883 | .proc_handler = proc_dointvec, |
1da177e4 | 884 | }, |
73efc039 DB |
885 | { |
886 | .procname = "cap_last_cap", | |
887 | .data = (void *)&cap_last_cap, | |
888 | .maxlen = sizeof(int), | |
889 | .mode = 0444, | |
890 | .proc_handler = proc_dointvec, | |
891 | }, | |
58687acb | 892 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 893 | { |
58687acb | 894 | .procname = "watchdog", |
3c00ea82 | 895 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
896 | .maxlen = sizeof (int), |
897 | .mode = 0644, | |
195daf66 | 898 | .proc_handler = proc_watchdog, |
586692a5 MSB |
899 | .extra1 = &zero, |
900 | .extra2 = &one, | |
58687acb DZ |
901 | }, |
902 | { | |
903 | .procname = "watchdog_thresh", | |
586692a5 | 904 | .data = &watchdog_thresh, |
58687acb DZ |
905 | .maxlen = sizeof(int), |
906 | .mode = 0644, | |
195daf66 | 907 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 908 | .extra1 = &zero, |
58687acb | 909 | .extra2 = &sixty, |
504d7cf1 | 910 | }, |
195daf66 UO |
911 | { |
912 | .procname = "nmi_watchdog", | |
913 | .data = &nmi_watchdog_enabled, | |
914 | .maxlen = sizeof (int), | |
915 | .mode = 0644, | |
916 | .proc_handler = proc_nmi_watchdog, | |
917 | .extra1 = &zero, | |
918 | #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) | |
919 | .extra2 = &one, | |
920 | #else | |
921 | .extra2 = &zero, | |
922 | #endif | |
923 | }, | |
924 | { | |
925 | .procname = "soft_watchdog", | |
926 | .data = &soft_watchdog_enabled, | |
927 | .maxlen = sizeof (int), | |
928 | .mode = 0644, | |
929 | .proc_handler = proc_soft_watchdog, | |
930 | .extra1 = &zero, | |
931 | .extra2 = &one, | |
932 | }, | |
fe4ba3c3 CM |
933 | { |
934 | .procname = "watchdog_cpumask", | |
935 | .data = &watchdog_cpumask_bits, | |
936 | .maxlen = NR_CPUS, | |
937 | .mode = 0644, | |
938 | .proc_handler = proc_watchdog_cpumask, | |
939 | }, | |
2508ce18 DZ |
940 | { |
941 | .procname = "softlockup_panic", | |
942 | .data = &softlockup_panic, | |
943 | .maxlen = sizeof(int), | |
944 | .mode = 0644, | |
945 | .proc_handler = proc_dointvec_minmax, | |
946 | .extra1 = &zero, | |
947 | .extra2 = &one, | |
948 | }, | |
ac1f5912 DZ |
949 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
950 | { | |
951 | .procname = "hardlockup_panic", | |
952 | .data = &hardlockup_panic, | |
953 | .maxlen = sizeof(int), | |
954 | .mode = 0644, | |
955 | .proc_handler = proc_dointvec_minmax, | |
956 | .extra1 = &zero, | |
957 | .extra2 = &one, | |
958 | }, | |
959 | #endif | |
ed235875 AT |
960 | #ifdef CONFIG_SMP |
961 | { | |
962 | .procname = "softlockup_all_cpu_backtrace", | |
963 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
964 | .maxlen = sizeof(int), | |
965 | .mode = 0644, | |
966 | .proc_handler = proc_dointvec_minmax, | |
967 | .extra1 = &zero, | |
968 | .extra2 = &one, | |
969 | }, | |
55537871 JK |
970 | { |
971 | .procname = "hardlockup_all_cpu_backtrace", | |
972 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
973 | .maxlen = sizeof(int), | |
974 | .mode = 0644, | |
975 | .proc_handler = proc_dointvec_minmax, | |
976 | .extra1 = &zero, | |
977 | .extra2 = &one, | |
978 | }, | |
ed235875 | 979 | #endif /* CONFIG_SMP */ |
5dc30558 DZ |
980 | #endif |
981 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
982 | { | |
983 | .procname = "unknown_nmi_panic", | |
984 | .data = &unknown_nmi_panic, | |
985 | .maxlen = sizeof (int), | |
986 | .mode = 0644, | |
987 | .proc_handler = proc_dointvec, | |
988 | }, | |
504d7cf1 | 989 | #endif |
1da177e4 | 990 | #if defined(CONFIG_X86) |
8da5adda | 991 | { |
8da5adda DZ |
992 | .procname = "panic_on_unrecovered_nmi", |
993 | .data = &panic_on_unrecovered_nmi, | |
994 | .maxlen = sizeof(int), | |
995 | .mode = 0644, | |
6d456111 | 996 | .proc_handler = proc_dointvec, |
8da5adda | 997 | }, |
5211a242 | 998 | { |
5211a242 KG |
999 | .procname = "panic_on_io_nmi", |
1000 | .data = &panic_on_io_nmi, | |
1001 | .maxlen = sizeof(int), | |
1002 | .mode = 0644, | |
6d456111 | 1003 | .proc_handler = proc_dointvec, |
5211a242 | 1004 | }, |
55af7796 MH |
1005 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
1006 | { | |
1007 | .procname = "panic_on_stackoverflow", | |
1008 | .data = &sysctl_panic_on_stackoverflow, | |
1009 | .maxlen = sizeof(int), | |
1010 | .mode = 0644, | |
1011 | .proc_handler = proc_dointvec, | |
1012 | }, | |
1013 | #endif | |
1da177e4 | 1014 | { |
1da177e4 LT |
1015 | .procname = "bootloader_type", |
1016 | .data = &bootloader_type, | |
1017 | .maxlen = sizeof (int), | |
1018 | .mode = 0444, | |
6d456111 | 1019 | .proc_handler = proc_dointvec, |
1da177e4 | 1020 | }, |
5031296c | 1021 | { |
5031296c PA |
1022 | .procname = "bootloader_version", |
1023 | .data = &bootloader_version, | |
1024 | .maxlen = sizeof (int), | |
1025 | .mode = 0444, | |
6d456111 | 1026 | .proc_handler = proc_dointvec, |
5031296c | 1027 | }, |
6e7c4025 | 1028 | { |
6e7c4025 IM |
1029 | .procname = "io_delay_type", |
1030 | .data = &io_delay_type, | |
1031 | .maxlen = sizeof(int), | |
1032 | .mode = 0644, | |
6d456111 | 1033 | .proc_handler = proc_dointvec, |
6e7c4025 | 1034 | }, |
1da177e4 | 1035 | #endif |
7a9166e3 | 1036 | #if defined(CONFIG_MMU) |
1da177e4 | 1037 | { |
1da177e4 LT |
1038 | .procname = "randomize_va_space", |
1039 | .data = &randomize_va_space, | |
1040 | .maxlen = sizeof(int), | |
1041 | .mode = 0644, | |
6d456111 | 1042 | .proc_handler = proc_dointvec, |
1da177e4 | 1043 | }, |
7a9166e3 | 1044 | #endif |
0152fb37 | 1045 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1046 | { |
951f22d5 MS |
1047 | .procname = "spin_retry", |
1048 | .data = &spin_retry, | |
1049 | .maxlen = sizeof (int), | |
1050 | .mode = 0644, | |
6d456111 | 1051 | .proc_handler = proc_dointvec, |
951f22d5 | 1052 | }, |
c255d844 | 1053 | #endif |
673d5b43 | 1054 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1055 | { |
c255d844 | 1056 | .procname = "acpi_video_flags", |
77afcf78 | 1057 | .data = &acpi_realmode_flags, |
c255d844 PM |
1058 | .maxlen = sizeof (unsigned long), |
1059 | .mode = 0644, | |
6d456111 | 1060 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1061 | }, |
d2b176ed | 1062 | #endif |
b6fca725 | 1063 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1064 | { |
d2b176ed JS |
1065 | .procname = "ignore-unaligned-usertrap", |
1066 | .data = &no_unaligned_warning, | |
1067 | .maxlen = sizeof (int), | |
1068 | .mode = 0644, | |
6d456111 | 1069 | .proc_handler = proc_dointvec, |
d2b176ed | 1070 | }, |
b6fca725 VG |
1071 | #endif |
1072 | #ifdef CONFIG_IA64 | |
88fc241f | 1073 | { |
88fc241f DC |
1074 | .procname = "unaligned-dump-stack", |
1075 | .data = &unaligned_dump_stack, | |
1076 | .maxlen = sizeof (int), | |
1077 | .mode = 0644, | |
6d456111 | 1078 | .proc_handler = proc_dointvec, |
88fc241f | 1079 | }, |
bebfa101 | 1080 | #endif |
e162b39a MSB |
1081 | #ifdef CONFIG_DETECT_HUNG_TASK |
1082 | { | |
e162b39a MSB |
1083 | .procname = "hung_task_panic", |
1084 | .data = &sysctl_hung_task_panic, | |
1085 | .maxlen = sizeof(int), | |
1086 | .mode = 0644, | |
6d456111 | 1087 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1088 | .extra1 = &zero, |
1089 | .extra2 = &one, | |
1090 | }, | |
82a1fcb9 | 1091 | { |
82a1fcb9 IM |
1092 | .procname = "hung_task_check_count", |
1093 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1094 | .maxlen = sizeof(int), |
82a1fcb9 | 1095 | .mode = 0644, |
cd64647f LZ |
1096 | .proc_handler = proc_dointvec_minmax, |
1097 | .extra1 = &zero, | |
82a1fcb9 IM |
1098 | }, |
1099 | { | |
82a1fcb9 IM |
1100 | .procname = "hung_task_timeout_secs", |
1101 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1102 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1103 | .mode = 0644, |
6d456111 | 1104 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1105 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1106 | }, |
1107 | { | |
82a1fcb9 IM |
1108 | .procname = "hung_task_warnings", |
1109 | .data = &sysctl_hung_task_warnings, | |
270750db | 1110 | .maxlen = sizeof(int), |
82a1fcb9 | 1111 | .mode = 0644, |
270750db AT |
1112 | .proc_handler = proc_dointvec_minmax, |
1113 | .extra1 = &neg_one, | |
82a1fcb9 | 1114 | }, |
c4f3b63f | 1115 | #endif |
23f78d4a IM |
1116 | #ifdef CONFIG_RT_MUTEXES |
1117 | { | |
23f78d4a IM |
1118 | .procname = "max_lock_depth", |
1119 | .data = &max_lock_depth, | |
1120 | .maxlen = sizeof(int), | |
1121 | .mode = 0644, | |
6d456111 | 1122 | .proc_handler = proc_dointvec, |
23f78d4a | 1123 | }, |
5096add8 | 1124 | #endif |
10a0a8d4 | 1125 | { |
10a0a8d4 JF |
1126 | .procname = "poweroff_cmd", |
1127 | .data = &poweroff_cmd, | |
1128 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1129 | .mode = 0644, | |
6d456111 | 1130 | .proc_handler = proc_dostring, |
10a0a8d4 | 1131 | }, |
0b77f5bf DH |
1132 | #ifdef CONFIG_KEYS |
1133 | { | |
0b77f5bf DH |
1134 | .procname = "keys", |
1135 | .mode = 0555, | |
1136 | .child = key_sysctls, | |
1137 | }, | |
1138 | #endif | |
cdd6c482 | 1139 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1140 | /* |
1141 | * User-space scripts rely on the existence of this file | |
1142 | * as a feature check for perf_events being enabled. | |
1143 | * | |
1144 | * So it's an ABI, do not remove! | |
1145 | */ | |
1ccd1549 | 1146 | { |
cdd6c482 IM |
1147 | .procname = "perf_event_paranoid", |
1148 | .data = &sysctl_perf_event_paranoid, | |
1149 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1150 | .mode = 0644, |
6d456111 | 1151 | .proc_handler = proc_dointvec, |
1ccd1549 | 1152 | }, |
c5078f78 | 1153 | { |
cdd6c482 IM |
1154 | .procname = "perf_event_mlock_kb", |
1155 | .data = &sysctl_perf_event_mlock, | |
1156 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1157 | .mode = 0644, |
6d456111 | 1158 | .proc_handler = proc_dointvec, |
c5078f78 | 1159 | }, |
a78ac325 | 1160 | { |
cdd6c482 IM |
1161 | .procname = "perf_event_max_sample_rate", |
1162 | .data = &sysctl_perf_event_sample_rate, | |
1163 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1164 | .mode = 0644, |
163ec435 | 1165 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1166 | .extra1 = &one, |
a78ac325 | 1167 | }, |
14c63f17 DH |
1168 | { |
1169 | .procname = "perf_cpu_time_max_percent", | |
1170 | .data = &sysctl_perf_cpu_time_max_percent, | |
1171 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1172 | .mode = 0644, | |
1173 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1174 | .extra1 = &zero, | |
1175 | .extra2 = &one_hundred, | |
1176 | }, | |
c5dfd78e ACM |
1177 | { |
1178 | .procname = "perf_event_max_stack", | |
a831100a | 1179 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1180 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1181 | .mode = 0644, | |
1182 | .proc_handler = perf_event_max_stack_handler, | |
1183 | .extra1 = &zero, | |
1184 | .extra2 = &six_hundred_forty_kb, | |
1185 | }, | |
c85b0334 ACM |
1186 | { |
1187 | .procname = "perf_event_max_contexts_per_stack", | |
1188 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1189 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1190 | .mode = 0644, | |
1191 | .proc_handler = perf_event_max_stack_handler, | |
1192 | .extra1 = &zero, | |
1193 | .extra2 = &one_thousand, | |
1194 | }, | |
1ccd1549 | 1195 | #endif |
dfec072e VN |
1196 | #ifdef CONFIG_KMEMCHECK |
1197 | { | |
dfec072e VN |
1198 | .procname = "kmemcheck", |
1199 | .data = &kmemcheck_enabled, | |
1200 | .maxlen = sizeof(int), | |
1201 | .mode = 0644, | |
6d456111 | 1202 | .proc_handler = proc_dointvec, |
dfec072e | 1203 | }, |
cb684b5b | 1204 | #endif |
9e3961a0 PB |
1205 | { |
1206 | .procname = "panic_on_warn", | |
1207 | .data = &panic_on_warn, | |
1208 | .maxlen = sizeof(int), | |
1209 | .mode = 0644, | |
1210 | .proc_handler = proc_dointvec_minmax, | |
1211 | .extra1 = &zero, | |
1212 | .extra2 = &one, | |
1213 | }, | |
bc7a34b8 TG |
1214 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1215 | { | |
1216 | .procname = "timer_migration", | |
1217 | .data = &sysctl_timer_migration, | |
1218 | .maxlen = sizeof(unsigned int), | |
1219 | .mode = 0644, | |
1220 | .proc_handler = timer_migration_handler, | |
1221 | }, | |
1be7f75d AS |
1222 | #endif |
1223 | #ifdef CONFIG_BPF_SYSCALL | |
1224 | { | |
1225 | .procname = "unprivileged_bpf_disabled", | |
1226 | .data = &sysctl_unprivileged_bpf_disabled, | |
1227 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1228 | .mode = 0644, | |
1229 | /* only handle a transition from default "0" to "1" */ | |
1230 | .proc_handler = proc_dointvec_minmax, | |
1231 | .extra1 = &one, | |
1232 | .extra2 = &one, | |
1233 | }, | |
088e9d25 DBO |
1234 | #endif |
1235 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) | |
1236 | { | |
1237 | .procname = "panic_on_rcu_stall", | |
1238 | .data = &sysctl_panic_on_rcu_stall, | |
1239 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1240 | .mode = 0644, | |
1241 | .proc_handler = proc_dointvec_minmax, | |
1242 | .extra1 = &zero, | |
1243 | .extra2 = &one, | |
1244 | }, | |
bc7a34b8 | 1245 | #endif |
6fce56ec | 1246 | { } |
1da177e4 LT |
1247 | }; |
1248 | ||
d8217f07 | 1249 | static struct ctl_table vm_table[] = { |
1da177e4 | 1250 | { |
1da177e4 LT |
1251 | .procname = "overcommit_memory", |
1252 | .data = &sysctl_overcommit_memory, | |
1253 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1254 | .mode = 0644, | |
cb16e95f PH |
1255 | .proc_handler = proc_dointvec_minmax, |
1256 | .extra1 = &zero, | |
1257 | .extra2 = &two, | |
1da177e4 | 1258 | }, |
fadd8fbd | 1259 | { |
fadd8fbd KH |
1260 | .procname = "panic_on_oom", |
1261 | .data = &sysctl_panic_on_oom, | |
1262 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1263 | .mode = 0644, | |
cb16e95f PH |
1264 | .proc_handler = proc_dointvec_minmax, |
1265 | .extra1 = &zero, | |
1266 | .extra2 = &two, | |
fadd8fbd | 1267 | }, |
fe071d7e | 1268 | { |
fe071d7e DR |
1269 | .procname = "oom_kill_allocating_task", |
1270 | .data = &sysctl_oom_kill_allocating_task, | |
1271 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1272 | .mode = 0644, | |
6d456111 | 1273 | .proc_handler = proc_dointvec, |
fe071d7e | 1274 | }, |
fef1bdd6 | 1275 | { |
fef1bdd6 DR |
1276 | .procname = "oom_dump_tasks", |
1277 | .data = &sysctl_oom_dump_tasks, | |
1278 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1279 | .mode = 0644, | |
6d456111 | 1280 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1281 | }, |
1da177e4 | 1282 | { |
1da177e4 LT |
1283 | .procname = "overcommit_ratio", |
1284 | .data = &sysctl_overcommit_ratio, | |
1285 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1286 | .mode = 0644, | |
49f0ce5f JM |
1287 | .proc_handler = overcommit_ratio_handler, |
1288 | }, | |
1289 | { | |
1290 | .procname = "overcommit_kbytes", | |
1291 | .data = &sysctl_overcommit_kbytes, | |
1292 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1293 | .mode = 0644, | |
1294 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1295 | }, |
1296 | { | |
1da177e4 LT |
1297 | .procname = "page-cluster", |
1298 | .data = &page_cluster, | |
1299 | .maxlen = sizeof(int), | |
1300 | .mode = 0644, | |
cb16e95f PH |
1301 | .proc_handler = proc_dointvec_minmax, |
1302 | .extra1 = &zero, | |
1da177e4 LT |
1303 | }, |
1304 | { | |
1da177e4 LT |
1305 | .procname = "dirty_background_ratio", |
1306 | .data = &dirty_background_ratio, | |
1307 | .maxlen = sizeof(dirty_background_ratio), | |
1308 | .mode = 0644, | |
6d456111 | 1309 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1310 | .extra1 = &zero, |
1311 | .extra2 = &one_hundred, | |
1312 | }, | |
2da02997 | 1313 | { |
2da02997 DR |
1314 | .procname = "dirty_background_bytes", |
1315 | .data = &dirty_background_bytes, | |
1316 | .maxlen = sizeof(dirty_background_bytes), | |
1317 | .mode = 0644, | |
6d456111 | 1318 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1319 | .extra1 = &one_ul, |
2da02997 | 1320 | }, |
1da177e4 | 1321 | { |
1da177e4 LT |
1322 | .procname = "dirty_ratio", |
1323 | .data = &vm_dirty_ratio, | |
1324 | .maxlen = sizeof(vm_dirty_ratio), | |
1325 | .mode = 0644, | |
6d456111 | 1326 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1327 | .extra1 = &zero, |
1328 | .extra2 = &one_hundred, | |
1329 | }, | |
2da02997 | 1330 | { |
2da02997 DR |
1331 | .procname = "dirty_bytes", |
1332 | .data = &vm_dirty_bytes, | |
1333 | .maxlen = sizeof(vm_dirty_bytes), | |
1334 | .mode = 0644, | |
6d456111 | 1335 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1336 | .extra1 = &dirty_bytes_min, |
2da02997 | 1337 | }, |
1da177e4 | 1338 | { |
1da177e4 | 1339 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1340 | .data = &dirty_writeback_interval, |
1341 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1342 | .mode = 0644, |
6d456111 | 1343 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1344 | }, |
1345 | { | |
1da177e4 | 1346 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1347 | .data = &dirty_expire_interval, |
1348 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1349 | .mode = 0644, |
cb16e95f PH |
1350 | .proc_handler = proc_dointvec_minmax, |
1351 | .extra1 = &zero, | |
1da177e4 | 1352 | }, |
1efff914 TT |
1353 | { |
1354 | .procname = "dirtytime_expire_seconds", | |
1355 | .data = &dirtytime_expire_interval, | |
1356 | .maxlen = sizeof(dirty_expire_interval), | |
1357 | .mode = 0644, | |
1358 | .proc_handler = dirtytime_interval_handler, | |
1359 | .extra1 = &zero, | |
1360 | }, | |
1da177e4 | 1361 | { |
3965c9ae WL |
1362 | .procname = "nr_pdflush_threads", |
1363 | .mode = 0444 /* read-only */, | |
1364 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1365 | }, |
1366 | { | |
1da177e4 LT |
1367 | .procname = "swappiness", |
1368 | .data = &vm_swappiness, | |
1369 | .maxlen = sizeof(vm_swappiness), | |
1370 | .mode = 0644, | |
6d456111 | 1371 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1372 | .extra1 = &zero, |
1373 | .extra2 = &one_hundred, | |
1374 | }, | |
1375 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1376 | { |
1da177e4 | 1377 | .procname = "nr_hugepages", |
e5ff2159 | 1378 | .data = NULL, |
1da177e4 LT |
1379 | .maxlen = sizeof(unsigned long), |
1380 | .mode = 0644, | |
6d456111 | 1381 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1382 | }, |
1383 | #ifdef CONFIG_NUMA | |
1384 | { | |
1385 | .procname = "nr_hugepages_mempolicy", | |
1386 | .data = NULL, | |
1387 | .maxlen = sizeof(unsigned long), | |
1388 | .mode = 0644, | |
1389 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 LS |
1390 | }, |
1391 | #endif | |
1da177e4 | 1392 | { |
1da177e4 LT |
1393 | .procname = "hugetlb_shm_group", |
1394 | .data = &sysctl_hugetlb_shm_group, | |
1395 | .maxlen = sizeof(gid_t), | |
1396 | .mode = 0644, | |
6d456111 | 1397 | .proc_handler = proc_dointvec, |
1da177e4 | 1398 | }, |
396faf03 | 1399 | { |
396faf03 MG |
1400 | .procname = "hugepages_treat_as_movable", |
1401 | .data = &hugepages_treat_as_movable, | |
1402 | .maxlen = sizeof(int), | |
1403 | .mode = 0644, | |
86cdb465 | 1404 | .proc_handler = proc_dointvec, |
396faf03 | 1405 | }, |
d1c3fb1f | 1406 | { |
d1c3fb1f | 1407 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1408 | .data = NULL, |
1409 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1410 | .mode = 0644, |
6d456111 | 1411 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1412 | }, |
1da177e4 LT |
1413 | #endif |
1414 | { | |
1da177e4 LT |
1415 | .procname = "lowmem_reserve_ratio", |
1416 | .data = &sysctl_lowmem_reserve_ratio, | |
1417 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1418 | .mode = 0644, | |
6d456111 | 1419 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1420 | }, |
9d0243bc | 1421 | { |
9d0243bc AM |
1422 | .procname = "drop_caches", |
1423 | .data = &sysctl_drop_caches, | |
1424 | .maxlen = sizeof(int), | |
1425 | .mode = 0644, | |
1426 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1427 | .extra1 = &one, |
5509a5d2 | 1428 | .extra2 = &four, |
9d0243bc | 1429 | }, |
76ab0f53 MG |
1430 | #ifdef CONFIG_COMPACTION |
1431 | { | |
1432 | .procname = "compact_memory", | |
1433 | .data = &sysctl_compact_memory, | |
1434 | .maxlen = sizeof(int), | |
1435 | .mode = 0200, | |
1436 | .proc_handler = sysctl_compaction_handler, | |
1437 | }, | |
5e771905 MG |
1438 | { |
1439 | .procname = "extfrag_threshold", | |
1440 | .data = &sysctl_extfrag_threshold, | |
1441 | .maxlen = sizeof(int), | |
1442 | .mode = 0644, | |
1443 | .proc_handler = sysctl_extfrag_handler, | |
1444 | .extra1 = &min_extfrag_threshold, | |
1445 | .extra2 = &max_extfrag_threshold, | |
1446 | }, | |
5bbe3547 EM |
1447 | { |
1448 | .procname = "compact_unevictable_allowed", | |
1449 | .data = &sysctl_compact_unevictable_allowed, | |
1450 | .maxlen = sizeof(int), | |
1451 | .mode = 0644, | |
1452 | .proc_handler = proc_dointvec, | |
1453 | .extra1 = &zero, | |
1454 | .extra2 = &one, | |
1455 | }, | |
5e771905 | 1456 | |
76ab0f53 | 1457 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1458 | { |
1da177e4 LT |
1459 | .procname = "min_free_kbytes", |
1460 | .data = &min_free_kbytes, | |
1461 | .maxlen = sizeof(min_free_kbytes), | |
1462 | .mode = 0644, | |
6d456111 | 1463 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1464 | .extra1 = &zero, |
1465 | }, | |
795ae7a0 JW |
1466 | { |
1467 | .procname = "watermark_scale_factor", | |
1468 | .data = &watermark_scale_factor, | |
1469 | .maxlen = sizeof(watermark_scale_factor), | |
1470 | .mode = 0644, | |
1471 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1472 | .extra1 = &one, | |
1473 | .extra2 = &one_thousand, | |
1474 | }, | |
8ad4b1fb | 1475 | { |
8ad4b1fb RS |
1476 | .procname = "percpu_pagelist_fraction", |
1477 | .data = &percpu_pagelist_fraction, | |
1478 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1479 | .mode = 0644, | |
6d456111 | 1480 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1481 | .extra1 = &zero, |
8ad4b1fb | 1482 | }, |
1da177e4 LT |
1483 | #ifdef CONFIG_MMU |
1484 | { | |
1da177e4 LT |
1485 | .procname = "max_map_count", |
1486 | .data = &sysctl_max_map_count, | |
1487 | .maxlen = sizeof(sysctl_max_map_count), | |
1488 | .mode = 0644, | |
3e26120c | 1489 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1490 | .extra1 = &zero, |
1da177e4 | 1491 | }, |
dd8632a1 PM |
1492 | #else |
1493 | { | |
dd8632a1 PM |
1494 | .procname = "nr_trim_pages", |
1495 | .data = &sysctl_nr_trim_pages, | |
1496 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1497 | .mode = 0644, | |
6d456111 | 1498 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1499 | .extra1 = &zero, |
1500 | }, | |
1da177e4 LT |
1501 | #endif |
1502 | { | |
1da177e4 LT |
1503 | .procname = "laptop_mode", |
1504 | .data = &laptop_mode, | |
1505 | .maxlen = sizeof(laptop_mode), | |
1506 | .mode = 0644, | |
6d456111 | 1507 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1508 | }, |
1509 | { | |
1da177e4 LT |
1510 | .procname = "block_dump", |
1511 | .data = &block_dump, | |
1512 | .maxlen = sizeof(block_dump), | |
1513 | .mode = 0644, | |
6d456111 | 1514 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1515 | .extra1 = &zero, |
1516 | }, | |
1517 | { | |
1da177e4 LT |
1518 | .procname = "vfs_cache_pressure", |
1519 | .data = &sysctl_vfs_cache_pressure, | |
1520 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1521 | .mode = 0644, | |
6d456111 | 1522 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1523 | .extra1 = &zero, |
1524 | }, | |
1525 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1526 | { | |
1da177e4 LT |
1527 | .procname = "legacy_va_layout", |
1528 | .data = &sysctl_legacy_va_layout, | |
1529 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1530 | .mode = 0644, | |
6d456111 | 1531 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1532 | .extra1 = &zero, |
1533 | }, | |
1534 | #endif | |
1743660b CL |
1535 | #ifdef CONFIG_NUMA |
1536 | { | |
1743660b | 1537 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1538 | .data = &node_reclaim_mode, |
1539 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1540 | .mode = 0644, |
6d456111 | 1541 | .proc_handler = proc_dointvec, |
c84db23c | 1542 | .extra1 = &zero, |
1743660b | 1543 | }, |
9614634f | 1544 | { |
9614634f CL |
1545 | .procname = "min_unmapped_ratio", |
1546 | .data = &sysctl_min_unmapped_ratio, | |
1547 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1548 | .mode = 0644, | |
6d456111 | 1549 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1550 | .extra1 = &zero, |
1551 | .extra2 = &one_hundred, | |
1552 | }, | |
0ff38490 | 1553 | { |
0ff38490 CL |
1554 | .procname = "min_slab_ratio", |
1555 | .data = &sysctl_min_slab_ratio, | |
1556 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1557 | .mode = 0644, | |
6d456111 | 1558 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1559 | .extra1 = &zero, |
1560 | .extra2 = &one_hundred, | |
1561 | }, | |
e6e5494c | 1562 | #endif |
77461ab3 CL |
1563 | #ifdef CONFIG_SMP |
1564 | { | |
77461ab3 CL |
1565 | .procname = "stat_interval", |
1566 | .data = &sysctl_stat_interval, | |
1567 | .maxlen = sizeof(sysctl_stat_interval), | |
1568 | .mode = 0644, | |
6d456111 | 1569 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1570 | }, |
52b6f46b HD |
1571 | { |
1572 | .procname = "stat_refresh", | |
1573 | .data = NULL, | |
1574 | .maxlen = 0, | |
1575 | .mode = 0600, | |
1576 | .proc_handler = vmstat_refresh, | |
1577 | }, | |
77461ab3 | 1578 | #endif |
6e141546 | 1579 | #ifdef CONFIG_MMU |
ed032189 | 1580 | { |
ed032189 | 1581 | .procname = "mmap_min_addr", |
788084ab EP |
1582 | .data = &dac_mmap_min_addr, |
1583 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1584 | .mode = 0644, |
6d456111 | 1585 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1586 | }, |
6e141546 | 1587 | #endif |
f0c0b2b8 KH |
1588 | #ifdef CONFIG_NUMA |
1589 | { | |
f0c0b2b8 KH |
1590 | .procname = "numa_zonelist_order", |
1591 | .data = &numa_zonelist_order, | |
1592 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1593 | .mode = 0644, | |
6d456111 | 1594 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1595 | }, |
1596 | #endif | |
2b8232ce | 1597 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1598 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1599 | { |
e6e5494c | 1600 | .procname = "vdso_enabled", |
3d7ee969 AL |
1601 | #ifdef CONFIG_X86_32 |
1602 | .data = &vdso32_enabled, | |
1603 | .maxlen = sizeof(vdso32_enabled), | |
1604 | #else | |
e6e5494c IM |
1605 | .data = &vdso_enabled, |
1606 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1607 | #endif |
e6e5494c | 1608 | .mode = 0644, |
6d456111 | 1609 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1610 | .extra1 = &zero, |
1611 | }, | |
1da177e4 | 1612 | #endif |
195cf453 BG |
1613 | #ifdef CONFIG_HIGHMEM |
1614 | { | |
195cf453 BG |
1615 | .procname = "highmem_is_dirtyable", |
1616 | .data = &vm_highmem_is_dirtyable, | |
1617 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1618 | .mode = 0644, | |
6d456111 | 1619 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1620 | .extra1 = &zero, |
1621 | .extra2 = &one, | |
1622 | }, | |
1623 | #endif | |
6a46079c AK |
1624 | #ifdef CONFIG_MEMORY_FAILURE |
1625 | { | |
6a46079c AK |
1626 | .procname = "memory_failure_early_kill", |
1627 | .data = &sysctl_memory_failure_early_kill, | |
1628 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1629 | .mode = 0644, | |
6d456111 | 1630 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1631 | .extra1 = &zero, |
1632 | .extra2 = &one, | |
1633 | }, | |
1634 | { | |
6a46079c AK |
1635 | .procname = "memory_failure_recovery", |
1636 | .data = &sysctl_memory_failure_recovery, | |
1637 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1638 | .mode = 0644, | |
6d456111 | 1639 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1640 | .extra1 = &zero, |
1641 | .extra2 = &one, | |
1642 | }, | |
1643 | #endif | |
c9b1d098 AS |
1644 | { |
1645 | .procname = "user_reserve_kbytes", | |
1646 | .data = &sysctl_user_reserve_kbytes, | |
1647 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1648 | .mode = 0644, | |
1649 | .proc_handler = proc_doulongvec_minmax, | |
1650 | }, | |
4eeab4f5 AS |
1651 | { |
1652 | .procname = "admin_reserve_kbytes", | |
1653 | .data = &sysctl_admin_reserve_kbytes, | |
1654 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1655 | .mode = 0644, | |
1656 | .proc_handler = proc_doulongvec_minmax, | |
1657 | }, | |
d07e2259 DC |
1658 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1659 | { | |
1660 | .procname = "mmap_rnd_bits", | |
1661 | .data = &mmap_rnd_bits, | |
1662 | .maxlen = sizeof(mmap_rnd_bits), | |
1663 | .mode = 0600, | |
1664 | .proc_handler = proc_dointvec_minmax, | |
1665 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1666 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1667 | }, | |
1668 | #endif | |
1669 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1670 | { | |
1671 | .procname = "mmap_rnd_compat_bits", | |
1672 | .data = &mmap_rnd_compat_bits, | |
1673 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1674 | .mode = 0600, | |
1675 | .proc_handler = proc_dointvec_minmax, | |
1676 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1677 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1678 | }, | |
1679 | #endif | |
6fce56ec | 1680 | { } |
1da177e4 LT |
1681 | }; |
1682 | ||
d8217f07 | 1683 | static struct ctl_table fs_table[] = { |
1da177e4 | 1684 | { |
1da177e4 LT |
1685 | .procname = "inode-nr", |
1686 | .data = &inodes_stat, | |
3942c07c | 1687 | .maxlen = 2*sizeof(long), |
1da177e4 | 1688 | .mode = 0444, |
cffbc8aa | 1689 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1690 | }, |
1691 | { | |
1da177e4 LT |
1692 | .procname = "inode-state", |
1693 | .data = &inodes_stat, | |
3942c07c | 1694 | .maxlen = 7*sizeof(long), |
1da177e4 | 1695 | .mode = 0444, |
cffbc8aa | 1696 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1697 | }, |
1698 | { | |
1da177e4 LT |
1699 | .procname = "file-nr", |
1700 | .data = &files_stat, | |
518de9b3 | 1701 | .maxlen = sizeof(files_stat), |
1da177e4 | 1702 | .mode = 0444, |
6d456111 | 1703 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1704 | }, |
1705 | { | |
1da177e4 LT |
1706 | .procname = "file-max", |
1707 | .data = &files_stat.max_files, | |
518de9b3 | 1708 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1709 | .mode = 0644, |
518de9b3 | 1710 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1711 | }, |
9cfe015a | 1712 | { |
9cfe015a ED |
1713 | .procname = "nr_open", |
1714 | .data = &sysctl_nr_open, | |
9b80a184 | 1715 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1716 | .mode = 0644, |
6d456111 | 1717 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1718 | .extra1 = &sysctl_nr_open_min, |
1719 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1720 | }, |
1da177e4 | 1721 | { |
1da177e4 LT |
1722 | .procname = "dentry-state", |
1723 | .data = &dentry_stat, | |
3942c07c | 1724 | .maxlen = 6*sizeof(long), |
1da177e4 | 1725 | .mode = 0444, |
312d3ca8 | 1726 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1727 | }, |
1728 | { | |
1da177e4 LT |
1729 | .procname = "overflowuid", |
1730 | .data = &fs_overflowuid, | |
1731 | .maxlen = sizeof(int), | |
1732 | .mode = 0644, | |
6d456111 | 1733 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1734 | .extra1 = &minolduid, |
1735 | .extra2 = &maxolduid, | |
1736 | }, | |
1737 | { | |
1da177e4 LT |
1738 | .procname = "overflowgid", |
1739 | .data = &fs_overflowgid, | |
1740 | .maxlen = sizeof(int), | |
1741 | .mode = 0644, | |
6d456111 | 1742 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1743 | .extra1 = &minolduid, |
1744 | .extra2 = &maxolduid, | |
1745 | }, | |
bfcd17a6 | 1746 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1747 | { |
1da177e4 LT |
1748 | .procname = "leases-enable", |
1749 | .data = &leases_enable, | |
1750 | .maxlen = sizeof(int), | |
1751 | .mode = 0644, | |
6d456111 | 1752 | .proc_handler = proc_dointvec, |
1da177e4 | 1753 | }, |
bfcd17a6 | 1754 | #endif |
1da177e4 LT |
1755 | #ifdef CONFIG_DNOTIFY |
1756 | { | |
1da177e4 LT |
1757 | .procname = "dir-notify-enable", |
1758 | .data = &dir_notify_enable, | |
1759 | .maxlen = sizeof(int), | |
1760 | .mode = 0644, | |
6d456111 | 1761 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1762 | }, |
1763 | #endif | |
1764 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1765 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1766 | { |
1da177e4 LT |
1767 | .procname = "lease-break-time", |
1768 | .data = &lease_break_time, | |
1769 | .maxlen = sizeof(int), | |
1770 | .mode = 0644, | |
6d456111 | 1771 | .proc_handler = proc_dointvec, |
1da177e4 | 1772 | }, |
bfcd17a6 | 1773 | #endif |
ebf3f09c | 1774 | #ifdef CONFIG_AIO |
1da177e4 | 1775 | { |
1da177e4 LT |
1776 | .procname = "aio-nr", |
1777 | .data = &aio_nr, | |
1778 | .maxlen = sizeof(aio_nr), | |
1779 | .mode = 0444, | |
6d456111 | 1780 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1781 | }, |
1782 | { | |
1da177e4 LT |
1783 | .procname = "aio-max-nr", |
1784 | .data = &aio_max_nr, | |
1785 | .maxlen = sizeof(aio_max_nr), | |
1786 | .mode = 0644, | |
6d456111 | 1787 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1788 | }, |
ebf3f09c | 1789 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1790 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1791 | { |
0399cb08 RL |
1792 | .procname = "inotify", |
1793 | .mode = 0555, | |
1794 | .child = inotify_table, | |
1795 | }, | |
1796 | #endif | |
7ef9964e DL |
1797 | #ifdef CONFIG_EPOLL |
1798 | { | |
1799 | .procname = "epoll", | |
1800 | .mode = 0555, | |
1801 | .child = epoll_table, | |
1802 | }, | |
1803 | #endif | |
1da177e4 | 1804 | #endif |
800179c9 KC |
1805 | { |
1806 | .procname = "protected_symlinks", | |
1807 | .data = &sysctl_protected_symlinks, | |
1808 | .maxlen = sizeof(int), | |
1809 | .mode = 0600, | |
1810 | .proc_handler = proc_dointvec_minmax, | |
1811 | .extra1 = &zero, | |
1812 | .extra2 = &one, | |
1813 | }, | |
1814 | { | |
1815 | .procname = "protected_hardlinks", | |
1816 | .data = &sysctl_protected_hardlinks, | |
1817 | .maxlen = sizeof(int), | |
1818 | .mode = 0600, | |
1819 | .proc_handler = proc_dointvec_minmax, | |
1820 | .extra1 = &zero, | |
1821 | .extra2 = &one, | |
1822 | }, | |
d6e71144 | 1823 | { |
d6e71144 AC |
1824 | .procname = "suid_dumpable", |
1825 | .data = &suid_dumpable, | |
1826 | .maxlen = sizeof(int), | |
1827 | .mode = 0644, | |
54b50199 | 1828 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1829 | .extra1 = &zero, |
1830 | .extra2 = &two, | |
d6e71144 | 1831 | }, |
2abc26fc EB |
1832 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1833 | { | |
2abc26fc EB |
1834 | .procname = "binfmt_misc", |
1835 | .mode = 0555, | |
f9bd6733 | 1836 | .child = sysctl_mount_point, |
2abc26fc EB |
1837 | }, |
1838 | #endif | |
b492e95b | 1839 | { |
ff9da691 JA |
1840 | .procname = "pipe-max-size", |
1841 | .data = &pipe_max_size, | |
b492e95b JA |
1842 | .maxlen = sizeof(int), |
1843 | .mode = 0644, | |
ff9da691 JA |
1844 | .proc_handler = &pipe_proc_fn, |
1845 | .extra1 = &pipe_min_size, | |
b492e95b | 1846 | }, |
759c0114 WT |
1847 | { |
1848 | .procname = "pipe-user-pages-hard", | |
1849 | .data = &pipe_user_pages_hard, | |
1850 | .maxlen = sizeof(pipe_user_pages_hard), | |
1851 | .mode = 0644, | |
1852 | .proc_handler = proc_doulongvec_minmax, | |
1853 | }, | |
1854 | { | |
1855 | .procname = "pipe-user-pages-soft", | |
1856 | .data = &pipe_user_pages_soft, | |
1857 | .maxlen = sizeof(pipe_user_pages_soft), | |
1858 | .mode = 0644, | |
1859 | .proc_handler = proc_doulongvec_minmax, | |
1860 | }, | |
d2921684 EB |
1861 | { |
1862 | .procname = "mount-max", | |
1863 | .data = &sysctl_mount_max, | |
1864 | .maxlen = sizeof(unsigned int), | |
1865 | .mode = 0644, | |
1866 | .proc_handler = proc_dointvec_minmax, | |
1867 | .extra1 = &one, | |
1868 | }, | |
6fce56ec | 1869 | { } |
1da177e4 LT |
1870 | }; |
1871 | ||
d8217f07 | 1872 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1873 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1874 | { |
abd4f750 MAS |
1875 | .procname = "exception-trace", |
1876 | .data = &show_unhandled_signals, | |
1877 | .maxlen = sizeof(int), | |
1878 | .mode = 0644, | |
1879 | .proc_handler = proc_dointvec | |
1880 | }, | |
b2be84df MH |
1881 | #endif |
1882 | #if defined(CONFIG_OPTPROBES) | |
1883 | { | |
1884 | .procname = "kprobes-optimization", | |
1885 | .data = &sysctl_kprobes_optimization, | |
1886 | .maxlen = sizeof(int), | |
1887 | .mode = 0644, | |
1888 | .proc_handler = proc_kprobes_optimization_handler, | |
1889 | .extra1 = &zero, | |
1890 | .extra2 = &one, | |
1891 | }, | |
abd4f750 | 1892 | #endif |
6fce56ec | 1893 | { } |
1da177e4 LT |
1894 | }; |
1895 | ||
d8217f07 | 1896 | static struct ctl_table dev_table[] = { |
6fce56ec | 1897 | { } |
0eeca283 | 1898 | }; |
1da177e4 | 1899 | |
de4e83bd | 1900 | int __init sysctl_init(void) |
d912b0cc | 1901 | { |
fd4b616b SR |
1902 | struct ctl_table_header *hdr; |
1903 | ||
1904 | hdr = register_sysctl_table(sysctl_base_table); | |
1905 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1906 | return 0; |
1907 | } | |
1908 | ||
b89a8171 EB |
1909 | #endif /* CONFIG_SYSCTL */ |
1910 | ||
1da177e4 LT |
1911 | /* |
1912 | * /proc/sys support | |
1913 | */ | |
1914 | ||
b89a8171 | 1915 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1916 | |
f8808300 KC |
1917 | static int _proc_do_string(char *data, int maxlen, int write, |
1918 | char __user *buffer, | |
b1ba4ddd | 1919 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1920 | { |
1921 | size_t len; | |
1922 | char __user *p; | |
1923 | char c; | |
8d060877 ON |
1924 | |
1925 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1926 | *lenp = 0; |
1927 | return 0; | |
1928 | } | |
8d060877 | 1929 | |
1da177e4 | 1930 | if (write) { |
f4aacea2 KC |
1931 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1932 | /* Only continue writes not past the end of buffer. */ | |
1933 | len = strlen(data); | |
1934 | if (len > maxlen - 1) | |
1935 | len = maxlen - 1; | |
1936 | ||
1937 | if (*ppos > len) | |
1938 | return 0; | |
1939 | len = *ppos; | |
1940 | } else { | |
1941 | /* Start writing from beginning of buffer. */ | |
1942 | len = 0; | |
1943 | } | |
1944 | ||
2ca9bb45 | 1945 | *ppos += *lenp; |
1da177e4 | 1946 | p = buffer; |
2ca9bb45 | 1947 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1948 | if (get_user(c, p++)) |
1949 | return -EFAULT; | |
1950 | if (c == 0 || c == '\n') | |
1951 | break; | |
2ca9bb45 | 1952 | data[len++] = c; |
1da177e4 | 1953 | } |
f8808300 | 1954 | data[len] = 0; |
1da177e4 | 1955 | } else { |
f5dd3d6f SV |
1956 | len = strlen(data); |
1957 | if (len > maxlen) | |
1958 | len = maxlen; | |
8d060877 ON |
1959 | |
1960 | if (*ppos > len) { | |
1961 | *lenp = 0; | |
1962 | return 0; | |
1963 | } | |
1964 | ||
1965 | data += *ppos; | |
1966 | len -= *ppos; | |
1967 | ||
1da177e4 LT |
1968 | if (len > *lenp) |
1969 | len = *lenp; | |
1970 | if (len) | |
f8808300 | 1971 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1972 | return -EFAULT; |
1973 | if (len < *lenp) { | |
f8808300 | 1974 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1975 | return -EFAULT; |
1976 | len++; | |
1977 | } | |
1978 | *lenp = len; | |
1979 | *ppos += len; | |
1980 | } | |
1981 | return 0; | |
1982 | } | |
1983 | ||
f4aacea2 KC |
1984 | static void warn_sysctl_write(struct ctl_table *table) |
1985 | { | |
1986 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1987 | "This will not be supported in the future. To silence this\n" | |
1988 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1989 | current->comm, table->procname); | |
1990 | } | |
1991 | ||
f5dd3d6f SV |
1992 | /** |
1993 | * proc_dostring - read a string sysctl | |
1994 | * @table: the sysctl table | |
1995 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1996 | * @buffer: the user buffer |
1997 | * @lenp: the size of the user buffer | |
1998 | * @ppos: file position | |
1999 | * | |
2000 | * Reads/writes a string from/to the user buffer. If the kernel | |
2001 | * buffer provided is not large enough to hold the string, the | |
2002 | * string is truncated. The copied string is %NULL-terminated. | |
2003 | * If the string is being read by the user process, it is copied | |
2004 | * and a newline '\n' is added. It is truncated if the buffer is | |
2005 | * not large enough. | |
2006 | * | |
2007 | * Returns 0 on success. | |
2008 | */ | |
8d65af78 | 2009 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2010 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2011 | { | |
f4aacea2 KC |
2012 | if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) |
2013 | warn_sysctl_write(table); | |
2014 | ||
f8808300 KC |
2015 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
2016 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
2017 | } |
2018 | ||
00b7c339 AW |
2019 | static size_t proc_skip_spaces(char **buf) |
2020 | { | |
2021 | size_t ret; | |
2022 | char *tmp = skip_spaces(*buf); | |
2023 | ret = tmp - *buf; | |
2024 | *buf = tmp; | |
2025 | return ret; | |
2026 | } | |
2027 | ||
9f977fb7 OP |
2028 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2029 | { | |
2030 | while (*size) { | |
2031 | if (**buf != v) | |
2032 | break; | |
2033 | (*size)--; | |
2034 | (*buf)++; | |
2035 | } | |
2036 | } | |
2037 | ||
00b7c339 AW |
2038 | #define TMPBUFLEN 22 |
2039 | /** | |
0fc377bd | 2040 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2041 | * |
0fc377bd RD |
2042 | * @buf: a kernel buffer |
2043 | * @size: size of the kernel buffer | |
2044 | * @val: this is where the number will be stored | |
2045 | * @neg: set to %TRUE if number is negative | |
2046 | * @perm_tr: a vector which contains the allowed trailers | |
2047 | * @perm_tr_len: size of the perm_tr vector | |
2048 | * @tr: pointer to store the trailer character | |
00b7c339 | 2049 | * |
0fc377bd RD |
2050 | * In case of success %0 is returned and @buf and @size are updated with |
2051 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2052 | * character exists (size is non-zero after returning from this | |
2053 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2054 | */ |
2055 | static int proc_get_long(char **buf, size_t *size, | |
2056 | unsigned long *val, bool *neg, | |
2057 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2058 | { | |
2059 | int len; | |
2060 | char *p, tmp[TMPBUFLEN]; | |
2061 | ||
2062 | if (!*size) | |
2063 | return -EINVAL; | |
2064 | ||
2065 | len = *size; | |
2066 | if (len > TMPBUFLEN - 1) | |
2067 | len = TMPBUFLEN - 1; | |
2068 | ||
2069 | memcpy(tmp, *buf, len); | |
2070 | ||
2071 | tmp[len] = 0; | |
2072 | p = tmp; | |
2073 | if (*p == '-' && *size > 1) { | |
2074 | *neg = true; | |
2075 | p++; | |
2076 | } else | |
2077 | *neg = false; | |
2078 | if (!isdigit(*p)) | |
2079 | return -EINVAL; | |
2080 | ||
2081 | *val = simple_strtoul(p, &p, 0); | |
2082 | ||
2083 | len = p - tmp; | |
2084 | ||
2085 | /* We don't know if the next char is whitespace thus we may accept | |
2086 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2087 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2088 | if (len == TMPBUFLEN - 1) | |
2089 | return -EINVAL; | |
2090 | ||
2091 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2092 | return -EINVAL; | |
1da177e4 | 2093 | |
00b7c339 AW |
2094 | if (tr && (len < *size)) |
2095 | *tr = *p; | |
2096 | ||
2097 | *buf += len; | |
2098 | *size -= len; | |
2099 | ||
2100 | return 0; | |
2101 | } | |
2102 | ||
2103 | /** | |
0fc377bd | 2104 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2105 | * |
0fc377bd RD |
2106 | * @buf: the user buffer |
2107 | * @size: the size of the user buffer | |
2108 | * @val: the integer to be converted | |
2109 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2110 | * |
0fc377bd RD |
2111 | * In case of success %0 is returned and @buf and @size are updated with |
2112 | * the amount of bytes written. | |
00b7c339 AW |
2113 | */ |
2114 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2115 | bool neg) | |
2116 | { | |
2117 | int len; | |
2118 | char tmp[TMPBUFLEN], *p = tmp; | |
2119 | ||
2120 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2121 | len = strlen(tmp); | |
2122 | if (len > *size) | |
2123 | len = *size; | |
2124 | if (copy_to_user(*buf, tmp, len)) | |
2125 | return -EFAULT; | |
2126 | *size -= len; | |
2127 | *buf += len; | |
2128 | return 0; | |
2129 | } | |
2130 | #undef TMPBUFLEN | |
2131 | ||
2132 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2133 | { | |
2134 | if (*size) { | |
2135 | char __user **buffer = (char __user **)buf; | |
2136 | if (put_user(c, *buffer)) | |
2137 | return -EFAULT; | |
2138 | (*size)--, (*buffer)++; | |
2139 | *buf = *buffer; | |
2140 | } | |
2141 | return 0; | |
2142 | } | |
1da177e4 | 2143 | |
00b7c339 | 2144 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2145 | int *valp, |
2146 | int write, void *data) | |
2147 | { | |
2148 | if (write) { | |
230633d1 HS |
2149 | if (*negp) { |
2150 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2151 | return -EINVAL; | |
2152 | *valp = -*lvalp; | |
2153 | } else { | |
2154 | if (*lvalp > (unsigned long) INT_MAX) | |
2155 | return -EINVAL; | |
2156 | *valp = *lvalp; | |
2157 | } | |
1da177e4 LT |
2158 | } else { |
2159 | int val = *valp; | |
2160 | if (val < 0) { | |
00b7c339 | 2161 | *negp = true; |
9a5bc726 | 2162 | *lvalp = -(unsigned long)val; |
1da177e4 | 2163 | } else { |
00b7c339 | 2164 | *negp = false; |
1da177e4 LT |
2165 | *lvalp = (unsigned long)val; |
2166 | } | |
2167 | } | |
2168 | return 0; | |
2169 | } | |
2170 | ||
e7d316a0 SAK |
2171 | static int do_proc_douintvec_conv(bool *negp, unsigned long *lvalp, |
2172 | int *valp, | |
2173 | int write, void *data) | |
2174 | { | |
2175 | if (write) { | |
2176 | if (*negp) | |
2177 | return -EINVAL; | |
2178 | *valp = *lvalp; | |
2179 | } else { | |
2180 | unsigned int val = *valp; | |
2181 | *lvalp = (unsigned long)val; | |
2182 | } | |
2183 | return 0; | |
2184 | } | |
2185 | ||
00b7c339 AW |
2186 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2187 | ||
d8217f07 | 2188 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2189 | int write, void __user *buffer, |
fcfbd547 | 2190 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2191 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2192 | int write, void *data), |
2193 | void *data) | |
2194 | { | |
00b7c339 | 2195 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2196 | size_t left; |
70f6cbb6 | 2197 | char *kbuf = NULL, *p; |
1da177e4 | 2198 | |
00b7c339 | 2199 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2200 | *lenp = 0; |
2201 | return 0; | |
2202 | } | |
2203 | ||
fcfbd547 | 2204 | i = (int *) tbl_data; |
1da177e4 LT |
2205 | vleft = table->maxlen / sizeof(*i); |
2206 | left = *lenp; | |
2207 | ||
2208 | if (!conv) | |
2209 | conv = do_proc_dointvec_conv; | |
2210 | ||
00b7c339 | 2211 | if (write) { |
f4aacea2 KC |
2212 | if (*ppos) { |
2213 | switch (sysctl_writes_strict) { | |
2214 | case SYSCTL_WRITES_STRICT: | |
2215 | goto out; | |
2216 | case SYSCTL_WRITES_WARN: | |
2217 | warn_sysctl_write(table); | |
2218 | break; | |
2219 | default: | |
2220 | break; | |
2221 | } | |
2222 | } | |
2223 | ||
00b7c339 AW |
2224 | if (left > PAGE_SIZE - 1) |
2225 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2226 | p = kbuf = memdup_user_nul(buffer, left); |
2227 | if (IS_ERR(kbuf)) | |
2228 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2229 | } |
2230 | ||
1da177e4 | 2231 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2232 | unsigned long lval; |
2233 | bool neg; | |
1da177e4 | 2234 | |
00b7c339 | 2235 | if (write) { |
70f6cbb6 | 2236 | left -= proc_skip_spaces(&p); |
1da177e4 | 2237 | |
563b0467 O |
2238 | if (!left) |
2239 | break; | |
70f6cbb6 | 2240 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2241 | proc_wspace_sep, |
2242 | sizeof(proc_wspace_sep), NULL); | |
2243 | if (err) | |
1da177e4 | 2244 | break; |
00b7c339 AW |
2245 | if (conv(&neg, &lval, i, 1, data)) { |
2246 | err = -EINVAL; | |
1da177e4 | 2247 | break; |
00b7c339 | 2248 | } |
1da177e4 | 2249 | } else { |
00b7c339 AW |
2250 | if (conv(&neg, &lval, i, 0, data)) { |
2251 | err = -EINVAL; | |
2252 | break; | |
2253 | } | |
1da177e4 | 2254 | if (!first) |
00b7c339 AW |
2255 | err = proc_put_char(&buffer, &left, '\t'); |
2256 | if (err) | |
2257 | break; | |
2258 | err = proc_put_long(&buffer, &left, lval, neg); | |
2259 | if (err) | |
1da177e4 | 2260 | break; |
1da177e4 LT |
2261 | } |
2262 | } | |
2263 | ||
00b7c339 AW |
2264 | if (!write && !first && left && !err) |
2265 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2266 | if (write && !err && left) |
70f6cbb6 | 2267 | left -= proc_skip_spaces(&p); |
1da177e4 | 2268 | if (write) { |
70f6cbb6 | 2269 | kfree(kbuf); |
00b7c339 AW |
2270 | if (first) |
2271 | return err ? : -EINVAL; | |
1da177e4 | 2272 | } |
1da177e4 | 2273 | *lenp -= left; |
f4aacea2 | 2274 | out: |
1da177e4 | 2275 | *ppos += *lenp; |
00b7c339 | 2276 | return err; |
1da177e4 LT |
2277 | } |
2278 | ||
8d65af78 | 2279 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2280 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2281 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2282 | int write, void *data), |
2283 | void *data) | |
2284 | { | |
8d65af78 | 2285 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2286 | buffer, lenp, ppos, conv, data); |
2287 | } | |
2288 | ||
1da177e4 LT |
2289 | /** |
2290 | * proc_dointvec - read a vector of integers | |
2291 | * @table: the sysctl table | |
2292 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2293 | * @buffer: the user buffer |
2294 | * @lenp: the size of the user buffer | |
2295 | * @ppos: file position | |
2296 | * | |
2297 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2298 | * values from/to the user buffer, treated as an ASCII string. | |
2299 | * | |
2300 | * Returns 0 on success. | |
2301 | */ | |
8d65af78 | 2302 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2303 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2304 | { | |
e7d316a0 SAK |
2305 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2306 | } | |
2307 | ||
2308 | /** | |
2309 | * proc_douintvec - read a vector of unsigned integers | |
2310 | * @table: the sysctl table | |
2311 | * @write: %TRUE if this is a write to the sysctl file | |
2312 | * @buffer: the user buffer | |
2313 | * @lenp: the size of the user buffer | |
2314 | * @ppos: file position | |
2315 | * | |
2316 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2317 | * values from/to the user buffer, treated as an ASCII string. | |
2318 | * | |
2319 | * Returns 0 on success. | |
2320 | */ | |
2321 | int proc_douintvec(struct ctl_table *table, int write, | |
2322 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2323 | { | |
2324 | return do_proc_dointvec(table, write, buffer, lenp, ppos, | |
2325 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2326 | } |
2327 | ||
34f5a398 | 2328 | /* |
25ddbb18 AK |
2329 | * Taint values can only be increased |
2330 | * This means we can safely use a temporary. | |
34f5a398 | 2331 | */ |
8d65af78 | 2332 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2333 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2334 | { | |
25ddbb18 AK |
2335 | struct ctl_table t; |
2336 | unsigned long tmptaint = get_taint(); | |
2337 | int err; | |
34f5a398 | 2338 | |
91fcd412 | 2339 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2340 | return -EPERM; |
2341 | ||
25ddbb18 AK |
2342 | t = *table; |
2343 | t.data = &tmptaint; | |
8d65af78 | 2344 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2345 | if (err < 0) |
2346 | return err; | |
2347 | ||
2348 | if (write) { | |
2349 | /* | |
2350 | * Poor man's atomic or. Not worth adding a primitive | |
2351 | * to everyone's atomic.h for this | |
2352 | */ | |
2353 | int i; | |
2354 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2355 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2356 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2357 | } |
2358 | } | |
2359 | ||
2360 | return err; | |
34f5a398 TT |
2361 | } |
2362 | ||
bfdc0b49 | 2363 | #ifdef CONFIG_PRINTK |
620f6e8e | 2364 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2365 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2366 | { | |
2367 | if (write && !capable(CAP_SYS_ADMIN)) | |
2368 | return -EPERM; | |
2369 | ||
2370 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2371 | } | |
2372 | #endif | |
2373 | ||
1da177e4 LT |
2374 | struct do_proc_dointvec_minmax_conv_param { |
2375 | int *min; | |
2376 | int *max; | |
2377 | }; | |
2378 | ||
00b7c339 AW |
2379 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2380 | int *valp, | |
1da177e4 LT |
2381 | int write, void *data) |
2382 | { | |
2383 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2384 | if (write) { | |
2385 | int val = *negp ? -*lvalp : *lvalp; | |
2386 | if ((param->min && *param->min > val) || | |
2387 | (param->max && *param->max < val)) | |
2388 | return -EINVAL; | |
2389 | *valp = val; | |
2390 | } else { | |
2391 | int val = *valp; | |
2392 | if (val < 0) { | |
00b7c339 | 2393 | *negp = true; |
9a5bc726 | 2394 | *lvalp = -(unsigned long)val; |
1da177e4 | 2395 | } else { |
00b7c339 | 2396 | *negp = false; |
1da177e4 LT |
2397 | *lvalp = (unsigned long)val; |
2398 | } | |
2399 | } | |
2400 | return 0; | |
2401 | } | |
2402 | ||
2403 | /** | |
2404 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2405 | * @table: the sysctl table | |
2406 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2407 | * @buffer: the user buffer |
2408 | * @lenp: the size of the user buffer | |
2409 | * @ppos: file position | |
2410 | * | |
2411 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2412 | * values from/to the user buffer, treated as an ASCII string. | |
2413 | * | |
2414 | * This routine will ensure the values are within the range specified by | |
2415 | * table->extra1 (min) and table->extra2 (max). | |
2416 | * | |
2417 | * Returns 0 on success. | |
2418 | */ | |
8d65af78 | 2419 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2420 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2421 | { | |
2422 | struct do_proc_dointvec_minmax_conv_param param = { | |
2423 | .min = (int *) table->extra1, | |
2424 | .max = (int *) table->extra2, | |
2425 | }; | |
8d65af78 | 2426 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2427 | do_proc_dointvec_minmax_conv, ¶m); |
2428 | } | |
2429 | ||
54b50199 KC |
2430 | static void validate_coredump_safety(void) |
2431 | { | |
046d662f | 2432 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2433 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2434 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2435 | printk(KERN_WARNING |
2436 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2437 | "Pipe handler or fully qualified core dump path required.\n" | |
2438 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2439 | ); | |
54b50199 | 2440 | } |
046d662f | 2441 | #endif |
54b50199 KC |
2442 | } |
2443 | ||
2444 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2445 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2446 | { | |
2447 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2448 | if (!error) | |
2449 | validate_coredump_safety(); | |
2450 | return error; | |
2451 | } | |
2452 | ||
046d662f | 2453 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2454 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2455 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2456 | { | |
2457 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2458 | if (!error) | |
2459 | validate_coredump_safety(); | |
2460 | return error; | |
2461 | } | |
046d662f | 2462 | #endif |
54b50199 | 2463 | |
d8217f07 | 2464 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2465 | void __user *buffer, |
2466 | size_t *lenp, loff_t *ppos, | |
2467 | unsigned long convmul, | |
2468 | unsigned long convdiv) | |
2469 | { | |
00b7c339 AW |
2470 | unsigned long *i, *min, *max; |
2471 | int vleft, first = 1, err = 0; | |
00b7c339 | 2472 | size_t left; |
70f6cbb6 | 2473 | char *kbuf = NULL, *p; |
00b7c339 AW |
2474 | |
2475 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2476 | *lenp = 0; |
2477 | return 0; | |
2478 | } | |
00b7c339 | 2479 | |
fcfbd547 | 2480 | i = (unsigned long *) data; |
1da177e4 LT |
2481 | min = (unsigned long *) table->extra1; |
2482 | max = (unsigned long *) table->extra2; | |
2483 | vleft = table->maxlen / sizeof(unsigned long); | |
2484 | left = *lenp; | |
00b7c339 AW |
2485 | |
2486 | if (write) { | |
f4aacea2 KC |
2487 | if (*ppos) { |
2488 | switch (sysctl_writes_strict) { | |
2489 | case SYSCTL_WRITES_STRICT: | |
2490 | goto out; | |
2491 | case SYSCTL_WRITES_WARN: | |
2492 | warn_sysctl_write(table); | |
2493 | break; | |
2494 | default: | |
2495 | break; | |
2496 | } | |
2497 | } | |
2498 | ||
00b7c339 AW |
2499 | if (left > PAGE_SIZE - 1) |
2500 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2501 | p = kbuf = memdup_user_nul(buffer, left); |
2502 | if (IS_ERR(kbuf)) | |
2503 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2504 | } |
2505 | ||
27b3d80a | 2506 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2507 | unsigned long val; |
2508 | ||
1da177e4 | 2509 | if (write) { |
00b7c339 AW |
2510 | bool neg; |
2511 | ||
70f6cbb6 | 2512 | left -= proc_skip_spaces(&p); |
00b7c339 | 2513 | |
70f6cbb6 | 2514 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2515 | proc_wspace_sep, |
2516 | sizeof(proc_wspace_sep), NULL); | |
2517 | if (err) | |
1da177e4 LT |
2518 | break; |
2519 | if (neg) | |
1da177e4 | 2520 | continue; |
ff9f8a7c | 2521 | val = convmul * val / convdiv; |
1da177e4 LT |
2522 | if ((min && val < *min) || (max && val > *max)) |
2523 | continue; | |
2524 | *i = val; | |
2525 | } else { | |
00b7c339 | 2526 | val = convdiv * (*i) / convmul; |
7833819d | 2527 | if (!first) { |
00b7c339 | 2528 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2529 | if (err) |
2530 | break; | |
2531 | } | |
00b7c339 AW |
2532 | err = proc_put_long(&buffer, &left, val, false); |
2533 | if (err) | |
2534 | break; | |
1da177e4 LT |
2535 | } |
2536 | } | |
2537 | ||
00b7c339 AW |
2538 | if (!write && !first && left && !err) |
2539 | err = proc_put_char(&buffer, &left, '\n'); | |
2540 | if (write && !err) | |
70f6cbb6 | 2541 | left -= proc_skip_spaces(&p); |
1da177e4 | 2542 | if (write) { |
70f6cbb6 | 2543 | kfree(kbuf); |
00b7c339 AW |
2544 | if (first) |
2545 | return err ? : -EINVAL; | |
1da177e4 | 2546 | } |
1da177e4 | 2547 | *lenp -= left; |
f4aacea2 | 2548 | out: |
1da177e4 | 2549 | *ppos += *lenp; |
00b7c339 | 2550 | return err; |
1da177e4 LT |
2551 | } |
2552 | ||
d8217f07 | 2553 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2554 | void __user *buffer, |
2555 | size_t *lenp, loff_t *ppos, | |
2556 | unsigned long convmul, | |
2557 | unsigned long convdiv) | |
2558 | { | |
2559 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2560 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2561 | } |
2562 | ||
1da177e4 LT |
2563 | /** |
2564 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2565 | * @table: the sysctl table | |
2566 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2567 | * @buffer: the user buffer |
2568 | * @lenp: the size of the user buffer | |
2569 | * @ppos: file position | |
2570 | * | |
2571 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2572 | * values from/to the user buffer, treated as an ASCII string. | |
2573 | * | |
2574 | * This routine will ensure the values are within the range specified by | |
2575 | * table->extra1 (min) and table->extra2 (max). | |
2576 | * | |
2577 | * Returns 0 on success. | |
2578 | */ | |
8d65af78 | 2579 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2580 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2581 | { | |
8d65af78 | 2582 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2583 | } |
2584 | ||
2585 | /** | |
2586 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2587 | * @table: the sysctl table | |
2588 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2589 | * @buffer: the user buffer |
2590 | * @lenp: the size of the user buffer | |
2591 | * @ppos: file position | |
2592 | * | |
2593 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2594 | * values from/to the user buffer, treated as an ASCII string. The values | |
2595 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2596 | * | |
2597 | * This routine will ensure the values are within the range specified by | |
2598 | * table->extra1 (min) and table->extra2 (max). | |
2599 | * | |
2600 | * Returns 0 on success. | |
2601 | */ | |
d8217f07 | 2602 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2603 | void __user *buffer, |
2604 | size_t *lenp, loff_t *ppos) | |
2605 | { | |
8d65af78 | 2606 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2607 | lenp, ppos, HZ, 1000l); |
2608 | } | |
2609 | ||
2610 | ||
00b7c339 | 2611 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2612 | int *valp, |
2613 | int write, void *data) | |
2614 | { | |
2615 | if (write) { | |
cba9f33d BS |
2616 | if (*lvalp > LONG_MAX / HZ) |
2617 | return 1; | |
1da177e4 LT |
2618 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2619 | } else { | |
2620 | int val = *valp; | |
2621 | unsigned long lval; | |
2622 | if (val < 0) { | |
00b7c339 | 2623 | *negp = true; |
9a5bc726 | 2624 | lval = -(unsigned long)val; |
1da177e4 | 2625 | } else { |
00b7c339 | 2626 | *negp = false; |
1da177e4 LT |
2627 | lval = (unsigned long)val; |
2628 | } | |
2629 | *lvalp = lval / HZ; | |
2630 | } | |
2631 | return 0; | |
2632 | } | |
2633 | ||
00b7c339 | 2634 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2635 | int *valp, |
2636 | int write, void *data) | |
2637 | { | |
2638 | if (write) { | |
cba9f33d BS |
2639 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2640 | return 1; | |
1da177e4 LT |
2641 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2642 | } else { | |
2643 | int val = *valp; | |
2644 | unsigned long lval; | |
2645 | if (val < 0) { | |
00b7c339 | 2646 | *negp = true; |
9a5bc726 | 2647 | lval = -(unsigned long)val; |
1da177e4 | 2648 | } else { |
00b7c339 | 2649 | *negp = false; |
1da177e4 LT |
2650 | lval = (unsigned long)val; |
2651 | } | |
2652 | *lvalp = jiffies_to_clock_t(lval); | |
2653 | } | |
2654 | return 0; | |
2655 | } | |
2656 | ||
00b7c339 | 2657 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2658 | int *valp, |
2659 | int write, void *data) | |
2660 | { | |
2661 | if (write) { | |
d738ce8f FF |
2662 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2663 | ||
2664 | if (jif > INT_MAX) | |
2665 | return 1; | |
2666 | *valp = (int)jif; | |
1da177e4 LT |
2667 | } else { |
2668 | int val = *valp; | |
2669 | unsigned long lval; | |
2670 | if (val < 0) { | |
00b7c339 | 2671 | *negp = true; |
9a5bc726 | 2672 | lval = -(unsigned long)val; |
1da177e4 | 2673 | } else { |
00b7c339 | 2674 | *negp = false; |
1da177e4 LT |
2675 | lval = (unsigned long)val; |
2676 | } | |
2677 | *lvalp = jiffies_to_msecs(lval); | |
2678 | } | |
2679 | return 0; | |
2680 | } | |
2681 | ||
2682 | /** | |
2683 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2684 | * @table: the sysctl table | |
2685 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2686 | * @buffer: the user buffer |
2687 | * @lenp: the size of the user buffer | |
2688 | * @ppos: file position | |
2689 | * | |
2690 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2691 | * values from/to the user buffer, treated as an ASCII string. | |
2692 | * The values read are assumed to be in seconds, and are converted into | |
2693 | * jiffies. | |
2694 | * | |
2695 | * Returns 0 on success. | |
2696 | */ | |
8d65af78 | 2697 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2698 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2699 | { | |
8d65af78 | 2700 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2701 | do_proc_dointvec_jiffies_conv,NULL); |
2702 | } | |
2703 | ||
2704 | /** | |
2705 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2706 | * @table: the sysctl table | |
2707 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2708 | * @buffer: the user buffer |
2709 | * @lenp: the size of the user buffer | |
1e5d5331 | 2710 | * @ppos: pointer to the file position |
1da177e4 LT |
2711 | * |
2712 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2713 | * values from/to the user buffer, treated as an ASCII string. | |
2714 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2715 | * are converted into jiffies. | |
2716 | * | |
2717 | * Returns 0 on success. | |
2718 | */ | |
8d65af78 | 2719 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2720 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2721 | { | |
8d65af78 | 2722 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2723 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2724 | } | |
2725 | ||
2726 | /** | |
2727 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2728 | * @table: the sysctl table | |
2729 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2730 | * @buffer: the user buffer |
2731 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2732 | * @ppos: file position |
2733 | * @ppos: the current position in the file | |
1da177e4 LT |
2734 | * |
2735 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2736 | * values from/to the user buffer, treated as an ASCII string. | |
2737 | * The values read are assumed to be in 1/1000 seconds, and | |
2738 | * are converted into jiffies. | |
2739 | * | |
2740 | * Returns 0 on success. | |
2741 | */ | |
8d65af78 | 2742 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2743 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2744 | { | |
8d65af78 | 2745 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2746 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2747 | } | |
2748 | ||
8d65af78 | 2749 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2750 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2751 | { | |
2752 | struct pid *new_pid; | |
2753 | pid_t tmp; | |
2754 | int r; | |
2755 | ||
6c5f3e7b | 2756 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2757 | |
8d65af78 | 2758 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2759 | lenp, ppos, NULL, NULL); |
2760 | if (r || !write) | |
2761 | return r; | |
2762 | ||
2763 | new_pid = find_get_pid(tmp); | |
2764 | if (!new_pid) | |
2765 | return -ESRCH; | |
2766 | ||
2767 | put_pid(xchg(&cad_pid, new_pid)); | |
2768 | return 0; | |
2769 | } | |
2770 | ||
9f977fb7 OP |
2771 | /** |
2772 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2773 | * @table: the sysctl table | |
2774 | * @write: %TRUE if this is a write to the sysctl file | |
2775 | * @buffer: the user buffer | |
2776 | * @lenp: the size of the user buffer | |
2777 | * @ppos: file position | |
2778 | * | |
2779 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2780 | * in table->maxlen. | |
2781 | * | |
2782 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2783 | * large bitmaps may be represented in a compact manner. Writing into | |
2784 | * the file will clear the bitmap then update it with the given input. | |
2785 | * | |
2786 | * Returns 0 on success. | |
2787 | */ | |
2788 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2789 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2790 | { | |
2791 | int err = 0; | |
2792 | bool first = 1; | |
2793 | size_t left = *lenp; | |
2794 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 2795 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
2796 | unsigned long *tmp_bitmap = NULL; |
2797 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2798 | ||
122ff243 | 2799 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
2800 | *lenp = 0; |
2801 | return 0; | |
2802 | } | |
2803 | ||
2804 | if (write) { | |
70f6cbb6 | 2805 | char *kbuf, *p; |
9f977fb7 OP |
2806 | |
2807 | if (left > PAGE_SIZE - 1) | |
2808 | left = PAGE_SIZE - 1; | |
2809 | ||
70f6cbb6 AV |
2810 | p = kbuf = memdup_user_nul(buffer, left); |
2811 | if (IS_ERR(kbuf)) | |
2812 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
2813 | |
2814 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2815 | GFP_KERNEL); | |
2816 | if (!tmp_bitmap) { | |
70f6cbb6 | 2817 | kfree(kbuf); |
9f977fb7 OP |
2818 | return -ENOMEM; |
2819 | } | |
70f6cbb6 | 2820 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
2821 | while (!err && left) { |
2822 | unsigned long val_a, val_b; | |
2823 | bool neg; | |
2824 | ||
70f6cbb6 | 2825 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
2826 | sizeof(tr_a), &c); |
2827 | if (err) | |
2828 | break; | |
2829 | if (val_a >= bitmap_len || neg) { | |
2830 | err = -EINVAL; | |
2831 | break; | |
2832 | } | |
2833 | ||
2834 | val_b = val_a; | |
2835 | if (left) { | |
70f6cbb6 | 2836 | p++; |
9f977fb7 OP |
2837 | left--; |
2838 | } | |
2839 | ||
2840 | if (c == '-') { | |
70f6cbb6 | 2841 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
2842 | &neg, tr_b, sizeof(tr_b), |
2843 | &c); | |
2844 | if (err) | |
2845 | break; | |
2846 | if (val_b >= bitmap_len || neg || | |
2847 | val_a > val_b) { | |
2848 | err = -EINVAL; | |
2849 | break; | |
2850 | } | |
2851 | if (left) { | |
70f6cbb6 | 2852 | p++; |
9f977fb7 OP |
2853 | left--; |
2854 | } | |
2855 | } | |
2856 | ||
5a04cca6 | 2857 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 2858 | first = 0; |
70f6cbb6 | 2859 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 2860 | } |
70f6cbb6 | 2861 | kfree(kbuf); |
9f977fb7 OP |
2862 | } else { |
2863 | unsigned long bit_a, bit_b = 0; | |
2864 | ||
2865 | while (left) { | |
2866 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2867 | if (bit_a >= bitmap_len) | |
2868 | break; | |
2869 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2870 | bit_a + 1) - 1; | |
2871 | ||
2872 | if (!first) { | |
2873 | err = proc_put_char(&buffer, &left, ','); | |
2874 | if (err) | |
2875 | break; | |
2876 | } | |
2877 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2878 | if (err) | |
2879 | break; | |
2880 | if (bit_a != bit_b) { | |
2881 | err = proc_put_char(&buffer, &left, '-'); | |
2882 | if (err) | |
2883 | break; | |
2884 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2885 | if (err) | |
2886 | break; | |
2887 | } | |
2888 | ||
2889 | first = 0; bit_b++; | |
2890 | } | |
2891 | if (!err) | |
2892 | err = proc_put_char(&buffer, &left, '\n'); | |
2893 | } | |
2894 | ||
2895 | if (!err) { | |
2896 | if (write) { | |
2897 | if (*ppos) | |
2898 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2899 | else | |
5a04cca6 | 2900 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2901 | } |
2902 | kfree(tmp_bitmap); | |
2903 | *lenp -= left; | |
2904 | *ppos += *lenp; | |
2905 | return 0; | |
2906 | } else { | |
2907 | kfree(tmp_bitmap); | |
2908 | return err; | |
2909 | } | |
2910 | } | |
2911 | ||
55610500 | 2912 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2913 | |
8d65af78 | 2914 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2915 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2916 | { | |
2917 | return -ENOSYS; | |
2918 | } | |
2919 | ||
8d65af78 | 2920 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2921 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2922 | { |
2923 | return -ENOSYS; | |
2924 | } | |
2925 | ||
e7d316a0 SAK |
2926 | int proc_douintvec(struct ctl_table *table, int write, |
2927 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2928 | { | |
2929 | return -ENOSYS; | |
2930 | } | |
2931 | ||
8d65af78 | 2932 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2933 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2934 | { | |
2935 | return -ENOSYS; | |
2936 | } | |
2937 | ||
8d65af78 | 2938 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2939 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2940 | { | |
2941 | return -ENOSYS; | |
2942 | } | |
2943 | ||
8d65af78 | 2944 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2945 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2946 | { | |
2947 | return -ENOSYS; | |
2948 | } | |
2949 | ||
8d65af78 | 2950 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2951 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2952 | { | |
2953 | return -ENOSYS; | |
2954 | } | |
2955 | ||
8d65af78 | 2956 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2957 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2958 | { | |
2959 | return -ENOSYS; | |
2960 | } | |
2961 | ||
d8217f07 | 2962 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2963 | void __user *buffer, |
2964 | size_t *lenp, loff_t *ppos) | |
2965 | { | |
2966 | return -ENOSYS; | |
2967 | } | |
2968 | ||
2969 | ||
55610500 | 2970 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2971 | |
1da177e4 LT |
2972 | /* |
2973 | * No sense putting this after each symbol definition, twice, | |
2974 | * exception granted :-) | |
2975 | */ | |
2976 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 2977 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
2978 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
2979 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2980 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2981 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2982 | EXPORT_SYMBOL(proc_dostring); | |
2983 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2984 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |