Commit | Line | Data |
---|---|---|
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> |
1da177e4 LT |
67 | |
68 | #include <asm/uaccess.h> | |
69 | #include <asm/processor.h> | |
70 | ||
29cbc78b AK |
71 | #ifdef CONFIG_X86 |
72 | #include <asm/nmi.h> | |
0741f4d2 | 73 | #include <asm/stacktrace.h> |
6e7c4025 | 74 | #include <asm/io.h> |
29cbc78b | 75 | #endif |
d550bbd4 DH |
76 | #ifdef CONFIG_SPARC |
77 | #include <asm/setup.h> | |
78 | #endif | |
c55b7c3e DY |
79 | #ifdef CONFIG_BSD_PROCESS_ACCT |
80 | #include <linux/acct.h> | |
81 | #endif | |
4f0e056f DY |
82 | #ifdef CONFIG_RT_MUTEXES |
83 | #include <linux/rtmutex.h> | |
84 | #endif | |
2edf5e49 DY |
85 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
86 | #include <linux/lockdep.h> | |
87 | #endif | |
15485a46 DY |
88 | #ifdef CONFIG_CHR_DEV_SG |
89 | #include <scsi/sg.h> | |
90 | #endif | |
29cbc78b | 91 | |
58687acb | 92 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
93 | #include <linux/nmi.h> |
94 | #endif | |
95 | ||
7058cb02 | 96 | |
1da177e4 LT |
97 | #if defined(CONFIG_SYSCTL) |
98 | ||
99 | /* External variables not in a header file. */ | |
1da177e4 | 100 | extern int max_threads; |
d6e71144 | 101 | extern int suid_dumpable; |
046d662f AK |
102 | #ifdef CONFIG_COREDUMP |
103 | extern int core_uses_pid; | |
1da177e4 | 104 | extern char core_pattern[]; |
a293980c | 105 | extern unsigned int core_pipe_limit; |
046d662f | 106 | #endif |
1da177e4 | 107 | extern int pid_max; |
1da177e4 | 108 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 109 | extern int percpu_pagelist_fraction; |
bebfa101 | 110 | extern int compat_log; |
9745512c | 111 | extern int latencytop_enabled; |
eceea0b3 | 112 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
113 | #ifndef CONFIG_MMU |
114 | extern int sysctl_nr_trim_pages; | |
115 | #endif | |
1da177e4 | 116 | |
c4f3b63f | 117 | /* Constants used for minimum and maximum */ |
2508ce18 | 118 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
119 | static int sixty = 60; |
120 | #endif | |
121 | ||
270750db AT |
122 | static int __maybe_unused neg_one = -1; |
123 | ||
c4f3b63f | 124 | static int zero; |
cd5f9a4c LT |
125 | static int __maybe_unused one = 1; |
126 | static int __maybe_unused two = 2; | |
5509a5d2 | 127 | static int __maybe_unused four = 4; |
fc3501d4 | 128 | static unsigned long one_ul = 1; |
c4f3b63f | 129 | static int one_hundred = 100; |
af91322e DY |
130 | #ifdef CONFIG_PRINTK |
131 | static int ten_thousand = 10000; | |
132 | #endif | |
c4f3b63f | 133 | |
9e4a5bda AR |
134 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
135 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
136 | ||
1da177e4 LT |
137 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
138 | static int maxolduid = 65535; | |
139 | static int minolduid; | |
140 | ||
141 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 142 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 143 | |
80df2847 LH |
144 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
145 | #ifdef CONFIG_DETECT_HUNG_TASK | |
146 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
147 | #endif | |
148 | ||
d14f1729 DY |
149 | #ifdef CONFIG_INOTIFY_USER |
150 | #include <linux/inotify.h> | |
151 | #endif | |
72c57ed5 | 152 | #ifdef CONFIG_SPARC |
1da177e4 LT |
153 | #endif |
154 | ||
155 | #ifdef __hppa__ | |
156 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
157 | #endif |
158 | ||
159 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
160 | extern int unaligned_enabled; |
161 | #endif | |
1da177e4 | 162 | |
d2b176ed | 163 | #ifdef CONFIG_IA64 |
88fc241f | 164 | extern int unaligned_dump_stack; |
d2b176ed JS |
165 | #endif |
166 | ||
b6fca725 VG |
167 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
168 | extern int no_unaligned_warning; | |
169 | #endif | |
170 | ||
d6f8ff73 | 171 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 KC |
172 | |
173 | #define SYSCTL_WRITES_LEGACY -1 | |
174 | #define SYSCTL_WRITES_WARN 0 | |
175 | #define SYSCTL_WRITES_STRICT 1 | |
176 | ||
177 | static int sysctl_writes_strict = SYSCTL_WRITES_WARN; | |
178 | ||
8d65af78 | 179 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 180 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 181 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 182 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 183 | #endif |
9ec52099 | 184 | |
bfdc0b49 | 185 | #ifdef CONFIG_PRINTK |
620f6e8e | 186 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
187 | void __user *buffer, size_t *lenp, loff_t *ppos); |
188 | #endif | |
189 | ||
54b50199 KC |
190 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
191 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 192 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
193 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
194 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 195 | #endif |
54b50199 | 196 | |
97f5f0cd | 197 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 198 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 199 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 200 | |
6f8fd1d7 | 201 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
202 | void __user *buffer, size_t *lenp, |
203 | loff_t *ppos) | |
204 | { | |
205 | int error; | |
206 | ||
207 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
208 | if (error) | |
209 | return error; | |
210 | ||
211 | if (write) | |
212 | sysrq_toggle_support(__sysrq_enabled); | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | #endif | |
218 | ||
d8217f07 EB |
219 | static struct ctl_table kern_table[]; |
220 | static struct ctl_table vm_table[]; | |
221 | static struct ctl_table fs_table[]; | |
222 | static struct ctl_table debug_table[]; | |
223 | static struct ctl_table dev_table[]; | |
224 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
225 | #ifdef CONFIG_EPOLL |
226 | extern struct ctl_table epoll_table[]; | |
227 | #endif | |
1da177e4 LT |
228 | |
229 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
230 | int sysctl_legacy_va_layout; | |
231 | #endif | |
232 | ||
1da177e4 LT |
233 | /* The default sysctl tables: */ |
234 | ||
de4e83bd | 235 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 236 | { |
1da177e4 LT |
237 | .procname = "kernel", |
238 | .mode = 0555, | |
239 | .child = kern_table, | |
240 | }, | |
241 | { | |
1da177e4 LT |
242 | .procname = "vm", |
243 | .mode = 0555, | |
244 | .child = vm_table, | |
245 | }, | |
1da177e4 | 246 | { |
1da177e4 LT |
247 | .procname = "fs", |
248 | .mode = 0555, | |
249 | .child = fs_table, | |
250 | }, | |
251 | { | |
1da177e4 LT |
252 | .procname = "debug", |
253 | .mode = 0555, | |
254 | .child = debug_table, | |
255 | }, | |
256 | { | |
1da177e4 LT |
257 | .procname = "dev", |
258 | .mode = 0555, | |
259 | .child = dev_table, | |
260 | }, | |
6fce56ec | 261 | { } |
1da177e4 LT |
262 | }; |
263 | ||
77e54a1f | 264 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
265 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
266 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
267 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
268 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 269 | #ifdef CONFIG_SMP |
1983a922 CE |
270 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
271 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
272 | #endif /* CONFIG_SMP */ |
273 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 274 | |
5e771905 MG |
275 | #ifdef CONFIG_COMPACTION |
276 | static int min_extfrag_threshold; | |
277 | static int max_extfrag_threshold = 1000; | |
278 | #endif | |
279 | ||
d8217f07 | 280 | static struct ctl_table kern_table[] = { |
2bba22c5 | 281 | { |
2bba22c5 MG |
282 | .procname = "sched_child_runs_first", |
283 | .data = &sysctl_sched_child_runs_first, | |
284 | .maxlen = sizeof(unsigned int), | |
285 | .mode = 0644, | |
6d456111 | 286 | .proc_handler = proc_dointvec, |
2bba22c5 | 287 | }, |
77e54a1f IM |
288 | #ifdef CONFIG_SCHED_DEBUG |
289 | { | |
b2be5e96 PZ |
290 | .procname = "sched_min_granularity_ns", |
291 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
292 | .maxlen = sizeof(unsigned int), |
293 | .mode = 0644, | |
702a7c76 | 294 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
295 | .extra1 = &min_sched_granularity_ns, |
296 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 297 | }, |
21805085 | 298 | { |
21805085 PZ |
299 | .procname = "sched_latency_ns", |
300 | .data = &sysctl_sched_latency, | |
301 | .maxlen = sizeof(unsigned int), | |
302 | .mode = 0644, | |
702a7c76 | 303 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
304 | .extra1 = &min_sched_granularity_ns, |
305 | .extra2 = &max_sched_granularity_ns, | |
306 | }, | |
77e54a1f | 307 | { |
77e54a1f IM |
308 | .procname = "sched_wakeup_granularity_ns", |
309 | .data = &sysctl_sched_wakeup_granularity, | |
310 | .maxlen = sizeof(unsigned int), | |
311 | .mode = 0644, | |
702a7c76 | 312 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
313 | .extra1 = &min_wakeup_granularity_ns, |
314 | .extra2 = &max_wakeup_granularity_ns, | |
315 | }, | |
cbee9f88 | 316 | #ifdef CONFIG_SMP |
1983a922 | 317 | { |
1983a922 CE |
318 | .procname = "sched_tunable_scaling", |
319 | .data = &sysctl_sched_tunable_scaling, | |
320 | .maxlen = sizeof(enum sched_tunable_scaling), | |
321 | .mode = 0644, | |
702a7c76 | 322 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
323 | .extra1 = &min_sched_tunable_scaling, |
324 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 325 | }, |
da84d961 | 326 | { |
d00535db | 327 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
328 | .data = &sysctl_sched_migration_cost, |
329 | .maxlen = sizeof(unsigned int), | |
330 | .mode = 0644, | |
6d456111 | 331 | .proc_handler = proc_dointvec, |
da84d961 | 332 | }, |
b82d9fdd | 333 | { |
b82d9fdd PZ |
334 | .procname = "sched_nr_migrate", |
335 | .data = &sysctl_sched_nr_migrate, | |
336 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 337 | .mode = 0644, |
6d456111 | 338 | .proc_handler = proc_dointvec, |
fa85ae24 | 339 | }, |
e9e9250b | 340 | { |
d00535db | 341 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
342 | .data = &sysctl_sched_time_avg, |
343 | .maxlen = sizeof(unsigned int), | |
344 | .mode = 0644, | |
6d456111 | 345 | .proc_handler = proc_dointvec, |
e9e9250b | 346 | }, |
a7a4f8a7 | 347 | { |
d00535db | 348 | .procname = "sched_shares_window_ns", |
a7a4f8a7 PT |
349 | .data = &sysctl_sched_shares_window, |
350 | .maxlen = sizeof(unsigned int), | |
351 | .mode = 0644, | |
352 | .proc_handler = proc_dointvec, | |
353 | }, | |
cd1bb94b | 354 | { |
cd1bb94b AB |
355 | .procname = "timer_migration", |
356 | .data = &sysctl_timer_migration, | |
357 | .maxlen = sizeof(unsigned int), | |
358 | .mode = 0644, | |
6d456111 | 359 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
360 | .extra1 = &zero, |
361 | .extra2 = &one, | |
fa85ae24 | 362 | }, |
cbee9f88 PZ |
363 | #endif /* CONFIG_SMP */ |
364 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
365 | { |
366 | .procname = "numa_balancing_scan_delay_ms", | |
367 | .data = &sysctl_numa_balancing_scan_delay, | |
368 | .maxlen = sizeof(unsigned int), | |
369 | .mode = 0644, | |
370 | .proc_handler = proc_dointvec, | |
371 | }, | |
cbee9f88 PZ |
372 | { |
373 | .procname = "numa_balancing_scan_period_min_ms", | |
374 | .data = &sysctl_numa_balancing_scan_period_min, | |
375 | .maxlen = sizeof(unsigned int), | |
376 | .mode = 0644, | |
377 | .proc_handler = proc_dointvec, | |
378 | }, | |
379 | { | |
380 | .procname = "numa_balancing_scan_period_max_ms", | |
381 | .data = &sysctl_numa_balancing_scan_period_max, | |
382 | .maxlen = sizeof(unsigned int), | |
383 | .mode = 0644, | |
384 | .proc_handler = proc_dointvec, | |
385 | }, | |
6e5fb223 PZ |
386 | { |
387 | .procname = "numa_balancing_scan_size_mb", | |
388 | .data = &sysctl_numa_balancing_scan_size, | |
389 | .maxlen = sizeof(unsigned int), | |
390 | .mode = 0644, | |
64192658 KT |
391 | .proc_handler = proc_dointvec_minmax, |
392 | .extra1 = &one, | |
6e5fb223 | 393 | }, |
54a43d54 AK |
394 | { |
395 | .procname = "numa_balancing", | |
396 | .data = NULL, /* filled in by handler */ | |
397 | .maxlen = sizeof(unsigned int), | |
398 | .mode = 0644, | |
399 | .proc_handler = sysctl_numa_balancing, | |
400 | .extra1 = &zero, | |
401 | .extra2 = &one, | |
402 | }, | |
cbee9f88 PZ |
403 | #endif /* CONFIG_NUMA_BALANCING */ |
404 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 405 | { |
9f0c1e56 PZ |
406 | .procname = "sched_rt_period_us", |
407 | .data = &sysctl_sched_rt_period, | |
408 | .maxlen = sizeof(unsigned int), | |
409 | .mode = 0644, | |
6d456111 | 410 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
411 | }, |
412 | { | |
9f0c1e56 PZ |
413 | .procname = "sched_rt_runtime_us", |
414 | .data = &sysctl_sched_rt_runtime, | |
415 | .maxlen = sizeof(int), | |
416 | .mode = 0644, | |
6d456111 | 417 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 418 | }, |
ce0dbbbb CW |
419 | { |
420 | .procname = "sched_rr_timeslice_ms", | |
421 | .data = &sched_rr_timeslice, | |
422 | .maxlen = sizeof(int), | |
423 | .mode = 0644, | |
424 | .proc_handler = sched_rr_handler, | |
425 | }, | |
5091faa4 MG |
426 | #ifdef CONFIG_SCHED_AUTOGROUP |
427 | { | |
428 | .procname = "sched_autogroup_enabled", | |
429 | .data = &sysctl_sched_autogroup_enabled, | |
430 | .maxlen = sizeof(unsigned int), | |
431 | .mode = 0644, | |
1747b21f | 432 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
433 | .extra1 = &zero, |
434 | .extra2 = &one, | |
435 | }, | |
436 | #endif | |
ec12cb7f PT |
437 | #ifdef CONFIG_CFS_BANDWIDTH |
438 | { | |
439 | .procname = "sched_cfs_bandwidth_slice_us", | |
440 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
441 | .maxlen = sizeof(unsigned int), | |
442 | .mode = 0644, | |
443 | .proc_handler = proc_dointvec_minmax, | |
444 | .extra1 = &one, | |
445 | }, | |
446 | #endif | |
f20786ff PZ |
447 | #ifdef CONFIG_PROVE_LOCKING |
448 | { | |
f20786ff PZ |
449 | .procname = "prove_locking", |
450 | .data = &prove_locking, | |
451 | .maxlen = sizeof(int), | |
452 | .mode = 0644, | |
6d456111 | 453 | .proc_handler = proc_dointvec, |
f20786ff PZ |
454 | }, |
455 | #endif | |
456 | #ifdef CONFIG_LOCK_STAT | |
457 | { | |
f20786ff PZ |
458 | .procname = "lock_stat", |
459 | .data = &lock_stat, | |
460 | .maxlen = sizeof(int), | |
461 | .mode = 0644, | |
6d456111 | 462 | .proc_handler = proc_dointvec, |
f20786ff | 463 | }, |
77e54a1f | 464 | #endif |
1da177e4 | 465 | { |
1da177e4 LT |
466 | .procname = "panic", |
467 | .data = &panic_timeout, | |
468 | .maxlen = sizeof(int), | |
469 | .mode = 0644, | |
6d456111 | 470 | .proc_handler = proc_dointvec, |
1da177e4 | 471 | }, |
046d662f | 472 | #ifdef CONFIG_COREDUMP |
1da177e4 | 473 | { |
1da177e4 LT |
474 | .procname = "core_uses_pid", |
475 | .data = &core_uses_pid, | |
476 | .maxlen = sizeof(int), | |
477 | .mode = 0644, | |
6d456111 | 478 | .proc_handler = proc_dointvec, |
1da177e4 LT |
479 | }, |
480 | { | |
1da177e4 LT |
481 | .procname = "core_pattern", |
482 | .data = core_pattern, | |
71ce92f3 | 483 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 484 | .mode = 0644, |
54b50199 | 485 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 486 | }, |
a293980c | 487 | { |
a293980c NH |
488 | .procname = "core_pipe_limit", |
489 | .data = &core_pipe_limit, | |
490 | .maxlen = sizeof(unsigned int), | |
491 | .mode = 0644, | |
6d456111 | 492 | .proc_handler = proc_dointvec, |
a293980c | 493 | }, |
046d662f | 494 | #endif |
34f5a398 | 495 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 496 | { |
1da177e4 | 497 | .procname = "tainted", |
25ddbb18 | 498 | .maxlen = sizeof(long), |
34f5a398 | 499 | .mode = 0644, |
6d456111 | 500 | .proc_handler = proc_taint, |
1da177e4 | 501 | }, |
f4aacea2 KC |
502 | { |
503 | .procname = "sysctl_writes_strict", | |
504 | .data = &sysctl_writes_strict, | |
505 | .maxlen = sizeof(int), | |
506 | .mode = 0644, | |
507 | .proc_handler = proc_dointvec_minmax, | |
508 | .extra1 = &neg_one, | |
509 | .extra2 = &one, | |
510 | }, | |
34f5a398 | 511 | #endif |
9745512c AV |
512 | #ifdef CONFIG_LATENCYTOP |
513 | { | |
514 | .procname = "latencytop", | |
515 | .data = &latencytop_enabled, | |
516 | .maxlen = sizeof(int), | |
517 | .mode = 0644, | |
6d456111 | 518 | .proc_handler = proc_dointvec, |
9745512c AV |
519 | }, |
520 | #endif | |
1da177e4 LT |
521 | #ifdef CONFIG_BLK_DEV_INITRD |
522 | { | |
1da177e4 LT |
523 | .procname = "real-root-dev", |
524 | .data = &real_root_dev, | |
525 | .maxlen = sizeof(int), | |
526 | .mode = 0644, | |
6d456111 | 527 | .proc_handler = proc_dointvec, |
1da177e4 LT |
528 | }, |
529 | #endif | |
45807a1d | 530 | { |
45807a1d IM |
531 | .procname = "print-fatal-signals", |
532 | .data = &print_fatal_signals, | |
533 | .maxlen = sizeof(int), | |
534 | .mode = 0644, | |
6d456111 | 535 | .proc_handler = proc_dointvec, |
45807a1d | 536 | }, |
72c57ed5 | 537 | #ifdef CONFIG_SPARC |
1da177e4 | 538 | { |
1da177e4 LT |
539 | .procname = "reboot-cmd", |
540 | .data = reboot_command, | |
541 | .maxlen = 256, | |
542 | .mode = 0644, | |
6d456111 | 543 | .proc_handler = proc_dostring, |
1da177e4 LT |
544 | }, |
545 | { | |
1da177e4 LT |
546 | .procname = "stop-a", |
547 | .data = &stop_a_enabled, | |
548 | .maxlen = sizeof (int), | |
549 | .mode = 0644, | |
6d456111 | 550 | .proc_handler = proc_dointvec, |
1da177e4 LT |
551 | }, |
552 | { | |
1da177e4 LT |
553 | .procname = "scons-poweroff", |
554 | .data = &scons_pwroff, | |
555 | .maxlen = sizeof (int), | |
556 | .mode = 0644, | |
6d456111 | 557 | .proc_handler = proc_dointvec, |
1da177e4 LT |
558 | }, |
559 | #endif | |
0871420f DM |
560 | #ifdef CONFIG_SPARC64 |
561 | { | |
0871420f DM |
562 | .procname = "tsb-ratio", |
563 | .data = &sysctl_tsb_ratio, | |
564 | .maxlen = sizeof (int), | |
565 | .mode = 0644, | |
6d456111 | 566 | .proc_handler = proc_dointvec, |
0871420f DM |
567 | }, |
568 | #endif | |
1da177e4 LT |
569 | #ifdef __hppa__ |
570 | { | |
1da177e4 LT |
571 | .procname = "soft-power", |
572 | .data = &pwrsw_enabled, | |
573 | .maxlen = sizeof (int), | |
574 | .mode = 0644, | |
6d456111 | 575 | .proc_handler = proc_dointvec, |
1da177e4 | 576 | }, |
bf14e3b9 VG |
577 | #endif |
578 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 579 | { |
1da177e4 LT |
580 | .procname = "unaligned-trap", |
581 | .data = &unaligned_enabled, | |
582 | .maxlen = sizeof (int), | |
583 | .mode = 0644, | |
6d456111 | 584 | .proc_handler = proc_dointvec, |
1da177e4 LT |
585 | }, |
586 | #endif | |
587 | { | |
1da177e4 LT |
588 | .procname = "ctrl-alt-del", |
589 | .data = &C_A_D, | |
590 | .maxlen = sizeof(int), | |
591 | .mode = 0644, | |
6d456111 | 592 | .proc_handler = proc_dointvec, |
1da177e4 | 593 | }, |
606576ce | 594 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 595 | { |
b0fc494f SR |
596 | .procname = "ftrace_enabled", |
597 | .data = &ftrace_enabled, | |
598 | .maxlen = sizeof(int), | |
599 | .mode = 0644, | |
6d456111 | 600 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
601 | }, |
602 | #endif | |
f38f1d2a SR |
603 | #ifdef CONFIG_STACK_TRACER |
604 | { | |
f38f1d2a SR |
605 | .procname = "stack_tracer_enabled", |
606 | .data = &stack_tracer_enabled, | |
607 | .maxlen = sizeof(int), | |
608 | .mode = 0644, | |
6d456111 | 609 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
610 | }, |
611 | #endif | |
944ac425 SR |
612 | #ifdef CONFIG_TRACING |
613 | { | |
3299b4dd | 614 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
615 | .data = &ftrace_dump_on_oops, |
616 | .maxlen = sizeof(int), | |
617 | .mode = 0644, | |
6d456111 | 618 | .proc_handler = proc_dointvec, |
944ac425 | 619 | }, |
de7edd31 SRRH |
620 | { |
621 | .procname = "traceoff_on_warning", | |
622 | .data = &__disable_trace_on_warning, | |
623 | .maxlen = sizeof(__disable_trace_on_warning), | |
624 | .mode = 0644, | |
625 | .proc_handler = proc_dointvec, | |
626 | }, | |
0daa2302 SRRH |
627 | { |
628 | .procname = "tracepoint_printk", | |
629 | .data = &tracepoint_printk, | |
630 | .maxlen = sizeof(tracepoint_printk), | |
631 | .mode = 0644, | |
632 | .proc_handler = proc_dointvec, | |
633 | }, | |
944ac425 | 634 | #endif |
7984754b KC |
635 | #ifdef CONFIG_KEXEC |
636 | { | |
637 | .procname = "kexec_load_disabled", | |
638 | .data = &kexec_load_disabled, | |
639 | .maxlen = sizeof(int), | |
640 | .mode = 0644, | |
641 | /* only handle a transition from default "0" to "1" */ | |
642 | .proc_handler = proc_dointvec_minmax, | |
643 | .extra1 = &one, | |
644 | .extra2 = &one, | |
645 | }, | |
646 | #endif | |
a1ef5adb | 647 | #ifdef CONFIG_MODULES |
1da177e4 | 648 | { |
1da177e4 LT |
649 | .procname = "modprobe", |
650 | .data = &modprobe_path, | |
651 | .maxlen = KMOD_PATH_LEN, | |
652 | .mode = 0644, | |
6d456111 | 653 | .proc_handler = proc_dostring, |
1da177e4 | 654 | }, |
3d43321b | 655 | { |
3d43321b KC |
656 | .procname = "modules_disabled", |
657 | .data = &modules_disabled, | |
658 | .maxlen = sizeof(int), | |
659 | .mode = 0644, | |
660 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 661 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
662 | .extra1 = &one, |
663 | .extra2 = &one, | |
664 | }, | |
1da177e4 | 665 | #endif |
86d56134 | 666 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 667 | { |
1da177e4 | 668 | .procname = "hotplug", |
312c004d KS |
669 | .data = &uevent_helper, |
670 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 671 | .mode = 0644, |
6d456111 | 672 | .proc_handler = proc_dostring, |
1da177e4 | 673 | }, |
86d56134 | 674 | #endif |
1da177e4 LT |
675 | #ifdef CONFIG_CHR_DEV_SG |
676 | { | |
1da177e4 LT |
677 | .procname = "sg-big-buff", |
678 | .data = &sg_big_buff, | |
679 | .maxlen = sizeof (int), | |
680 | .mode = 0444, | |
6d456111 | 681 | .proc_handler = proc_dointvec, |
1da177e4 LT |
682 | }, |
683 | #endif | |
684 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
685 | { | |
1da177e4 LT |
686 | .procname = "acct", |
687 | .data = &acct_parm, | |
688 | .maxlen = 3*sizeof(int), | |
689 | .mode = 0644, | |
6d456111 | 690 | .proc_handler = proc_dointvec, |
1da177e4 LT |
691 | }, |
692 | #endif | |
1da177e4 LT |
693 | #ifdef CONFIG_MAGIC_SYSRQ |
694 | { | |
1da177e4 | 695 | .procname = "sysrq", |
5d6f647f | 696 | .data = &__sysrq_enabled, |
1da177e4 LT |
697 | .maxlen = sizeof (int), |
698 | .mode = 0644, | |
97f5f0cd | 699 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
700 | }, |
701 | #endif | |
d6f8ff73 | 702 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 703 | { |
1da177e4 | 704 | .procname = "cad_pid", |
9ec52099 | 705 | .data = NULL, |
1da177e4 LT |
706 | .maxlen = sizeof (int), |
707 | .mode = 0600, | |
6d456111 | 708 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 709 | }, |
d6f8ff73 | 710 | #endif |
1da177e4 | 711 | { |
1da177e4 LT |
712 | .procname = "threads-max", |
713 | .data = &max_threads, | |
714 | .maxlen = sizeof(int), | |
715 | .mode = 0644, | |
6d456111 | 716 | .proc_handler = proc_dointvec, |
1da177e4 LT |
717 | }, |
718 | { | |
1da177e4 LT |
719 | .procname = "random", |
720 | .mode = 0555, | |
721 | .child = random_table, | |
722 | }, | |
17f60a7d EP |
723 | { |
724 | .procname = "usermodehelper", | |
725 | .mode = 0555, | |
726 | .child = usermodehelper_table, | |
727 | }, | |
1da177e4 | 728 | { |
1da177e4 LT |
729 | .procname = "overflowuid", |
730 | .data = &overflowuid, | |
731 | .maxlen = sizeof(int), | |
732 | .mode = 0644, | |
6d456111 | 733 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
734 | .extra1 = &minolduid, |
735 | .extra2 = &maxolduid, | |
736 | }, | |
737 | { | |
1da177e4 LT |
738 | .procname = "overflowgid", |
739 | .data = &overflowgid, | |
740 | .maxlen = sizeof(int), | |
741 | .mode = 0644, | |
6d456111 | 742 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
743 | .extra1 = &minolduid, |
744 | .extra2 = &maxolduid, | |
745 | }, | |
347a8dc3 | 746 | #ifdef CONFIG_S390 |
1da177e4 LT |
747 | #ifdef CONFIG_MATHEMU |
748 | { | |
1da177e4 LT |
749 | .procname = "ieee_emulation_warnings", |
750 | .data = &sysctl_ieee_emulation_warnings, | |
751 | .maxlen = sizeof(int), | |
752 | .mode = 0644, | |
6d456111 | 753 | .proc_handler = proc_dointvec, |
1da177e4 | 754 | }, |
1da177e4 LT |
755 | #endif |
756 | { | |
1da177e4 | 757 | .procname = "userprocess_debug", |
ab3c68ee | 758 | .data = &show_unhandled_signals, |
1da177e4 LT |
759 | .maxlen = sizeof(int), |
760 | .mode = 0644, | |
6d456111 | 761 | .proc_handler = proc_dointvec, |
1da177e4 LT |
762 | }, |
763 | #endif | |
764 | { | |
1da177e4 LT |
765 | .procname = "pid_max", |
766 | .data = &pid_max, | |
767 | .maxlen = sizeof (int), | |
768 | .mode = 0644, | |
6d456111 | 769 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
770 | .extra1 = &pid_max_min, |
771 | .extra2 = &pid_max_max, | |
772 | }, | |
773 | { | |
1da177e4 LT |
774 | .procname = "panic_on_oops", |
775 | .data = &panic_on_oops, | |
776 | .maxlen = sizeof(int), | |
777 | .mode = 0644, | |
6d456111 | 778 | .proc_handler = proc_dointvec, |
1da177e4 | 779 | }, |
7ef3d2fd JP |
780 | #if defined CONFIG_PRINTK |
781 | { | |
7ef3d2fd JP |
782 | .procname = "printk", |
783 | .data = &console_loglevel, | |
784 | .maxlen = 4*sizeof(int), | |
785 | .mode = 0644, | |
6d456111 | 786 | .proc_handler = proc_dointvec, |
7ef3d2fd | 787 | }, |
1da177e4 | 788 | { |
1da177e4 | 789 | .procname = "printk_ratelimit", |
717115e1 | 790 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
791 | .maxlen = sizeof(int), |
792 | .mode = 0644, | |
6d456111 | 793 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
794 | }, |
795 | { | |
1da177e4 | 796 | .procname = "printk_ratelimit_burst", |
717115e1 | 797 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
798 | .maxlen = sizeof(int), |
799 | .mode = 0644, | |
6d456111 | 800 | .proc_handler = proc_dointvec, |
1da177e4 | 801 | }, |
af91322e | 802 | { |
af91322e DY |
803 | .procname = "printk_delay", |
804 | .data = &printk_delay_msec, | |
805 | .maxlen = sizeof(int), | |
806 | .mode = 0644, | |
6d456111 | 807 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
808 | .extra1 = &zero, |
809 | .extra2 = &ten_thousand, | |
810 | }, | |
eaf06b24 DR |
811 | { |
812 | .procname = "dmesg_restrict", | |
813 | .data = &dmesg_restrict, | |
814 | .maxlen = sizeof(int), | |
815 | .mode = 0644, | |
620f6e8e | 816 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
817 | .extra1 = &zero, |
818 | .extra2 = &one, | |
819 | }, | |
455cd5ab DR |
820 | { |
821 | .procname = "kptr_restrict", | |
822 | .data = &kptr_restrict, | |
823 | .maxlen = sizeof(int), | |
824 | .mode = 0644, | |
620f6e8e | 825 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
826 | .extra1 = &zero, |
827 | .extra2 = &two, | |
828 | }, | |
df6e61d4 | 829 | #endif |
1da177e4 | 830 | { |
1da177e4 LT |
831 | .procname = "ngroups_max", |
832 | .data = &ngroups_max, | |
833 | .maxlen = sizeof (int), | |
834 | .mode = 0444, | |
6d456111 | 835 | .proc_handler = proc_dointvec, |
1da177e4 | 836 | }, |
73efc039 DB |
837 | { |
838 | .procname = "cap_last_cap", | |
839 | .data = (void *)&cap_last_cap, | |
840 | .maxlen = sizeof(int), | |
841 | .mode = 0444, | |
842 | .proc_handler = proc_dointvec, | |
843 | }, | |
58687acb | 844 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 845 | { |
58687acb | 846 | .procname = "watchdog", |
3c00ea82 | 847 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
848 | .maxlen = sizeof (int), |
849 | .mode = 0644, | |
195daf66 | 850 | .proc_handler = proc_watchdog, |
586692a5 MSB |
851 | .extra1 = &zero, |
852 | .extra2 = &one, | |
58687acb DZ |
853 | }, |
854 | { | |
855 | .procname = "watchdog_thresh", | |
586692a5 | 856 | .data = &watchdog_thresh, |
58687acb DZ |
857 | .maxlen = sizeof(int), |
858 | .mode = 0644, | |
195daf66 | 859 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 860 | .extra1 = &zero, |
58687acb | 861 | .extra2 = &sixty, |
504d7cf1 | 862 | }, |
195daf66 UO |
863 | { |
864 | .procname = "nmi_watchdog", | |
865 | .data = &nmi_watchdog_enabled, | |
866 | .maxlen = sizeof (int), | |
867 | .mode = 0644, | |
868 | .proc_handler = proc_nmi_watchdog, | |
869 | .extra1 = &zero, | |
870 | #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) | |
871 | .extra2 = &one, | |
872 | #else | |
873 | .extra2 = &zero, | |
874 | #endif | |
875 | }, | |
876 | { | |
877 | .procname = "soft_watchdog", | |
878 | .data = &soft_watchdog_enabled, | |
879 | .maxlen = sizeof (int), | |
880 | .mode = 0644, | |
881 | .proc_handler = proc_soft_watchdog, | |
882 | .extra1 = &zero, | |
883 | .extra2 = &one, | |
884 | }, | |
2508ce18 DZ |
885 | { |
886 | .procname = "softlockup_panic", | |
887 | .data = &softlockup_panic, | |
888 | .maxlen = sizeof(int), | |
889 | .mode = 0644, | |
890 | .proc_handler = proc_dointvec_minmax, | |
891 | .extra1 = &zero, | |
892 | .extra2 = &one, | |
893 | }, | |
ed235875 AT |
894 | #ifdef CONFIG_SMP |
895 | { | |
896 | .procname = "softlockup_all_cpu_backtrace", | |
897 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
898 | .maxlen = sizeof(int), | |
899 | .mode = 0644, | |
900 | .proc_handler = proc_dointvec_minmax, | |
901 | .extra1 = &zero, | |
902 | .extra2 = &one, | |
903 | }, | |
904 | #endif /* CONFIG_SMP */ | |
5dc30558 DZ |
905 | #endif |
906 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
907 | { | |
908 | .procname = "unknown_nmi_panic", | |
909 | .data = &unknown_nmi_panic, | |
910 | .maxlen = sizeof (int), | |
911 | .mode = 0644, | |
912 | .proc_handler = proc_dointvec, | |
913 | }, | |
504d7cf1 | 914 | #endif |
1da177e4 | 915 | #if defined(CONFIG_X86) |
8da5adda | 916 | { |
8da5adda DZ |
917 | .procname = "panic_on_unrecovered_nmi", |
918 | .data = &panic_on_unrecovered_nmi, | |
919 | .maxlen = sizeof(int), | |
920 | .mode = 0644, | |
6d456111 | 921 | .proc_handler = proc_dointvec, |
8da5adda | 922 | }, |
5211a242 | 923 | { |
5211a242 KG |
924 | .procname = "panic_on_io_nmi", |
925 | .data = &panic_on_io_nmi, | |
926 | .maxlen = sizeof(int), | |
927 | .mode = 0644, | |
6d456111 | 928 | .proc_handler = proc_dointvec, |
5211a242 | 929 | }, |
55af7796 MH |
930 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
931 | { | |
932 | .procname = "panic_on_stackoverflow", | |
933 | .data = &sysctl_panic_on_stackoverflow, | |
934 | .maxlen = sizeof(int), | |
935 | .mode = 0644, | |
936 | .proc_handler = proc_dointvec, | |
937 | }, | |
938 | #endif | |
1da177e4 | 939 | { |
1da177e4 LT |
940 | .procname = "bootloader_type", |
941 | .data = &bootloader_type, | |
942 | .maxlen = sizeof (int), | |
943 | .mode = 0444, | |
6d456111 | 944 | .proc_handler = proc_dointvec, |
1da177e4 | 945 | }, |
5031296c | 946 | { |
5031296c PA |
947 | .procname = "bootloader_version", |
948 | .data = &bootloader_version, | |
949 | .maxlen = sizeof (int), | |
950 | .mode = 0444, | |
6d456111 | 951 | .proc_handler = proc_dointvec, |
5031296c | 952 | }, |
0741f4d2 | 953 | { |
0741f4d2 CE |
954 | .procname = "kstack_depth_to_print", |
955 | .data = &kstack_depth_to_print, | |
956 | .maxlen = sizeof(int), | |
957 | .mode = 0644, | |
6d456111 | 958 | .proc_handler = proc_dointvec, |
0741f4d2 | 959 | }, |
6e7c4025 | 960 | { |
6e7c4025 IM |
961 | .procname = "io_delay_type", |
962 | .data = &io_delay_type, | |
963 | .maxlen = sizeof(int), | |
964 | .mode = 0644, | |
6d456111 | 965 | .proc_handler = proc_dointvec, |
6e7c4025 | 966 | }, |
1da177e4 | 967 | #endif |
7a9166e3 | 968 | #if defined(CONFIG_MMU) |
1da177e4 | 969 | { |
1da177e4 LT |
970 | .procname = "randomize_va_space", |
971 | .data = &randomize_va_space, | |
972 | .maxlen = sizeof(int), | |
973 | .mode = 0644, | |
6d456111 | 974 | .proc_handler = proc_dointvec, |
1da177e4 | 975 | }, |
7a9166e3 | 976 | #endif |
0152fb37 | 977 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 978 | { |
951f22d5 MS |
979 | .procname = "spin_retry", |
980 | .data = &spin_retry, | |
981 | .maxlen = sizeof (int), | |
982 | .mode = 0644, | |
6d456111 | 983 | .proc_handler = proc_dointvec, |
951f22d5 | 984 | }, |
c255d844 | 985 | #endif |
673d5b43 | 986 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 987 | { |
c255d844 | 988 | .procname = "acpi_video_flags", |
77afcf78 | 989 | .data = &acpi_realmode_flags, |
c255d844 PM |
990 | .maxlen = sizeof (unsigned long), |
991 | .mode = 0644, | |
6d456111 | 992 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 993 | }, |
d2b176ed | 994 | #endif |
b6fca725 | 995 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 996 | { |
d2b176ed JS |
997 | .procname = "ignore-unaligned-usertrap", |
998 | .data = &no_unaligned_warning, | |
999 | .maxlen = sizeof (int), | |
1000 | .mode = 0644, | |
6d456111 | 1001 | .proc_handler = proc_dointvec, |
d2b176ed | 1002 | }, |
b6fca725 VG |
1003 | #endif |
1004 | #ifdef CONFIG_IA64 | |
88fc241f | 1005 | { |
88fc241f DC |
1006 | .procname = "unaligned-dump-stack", |
1007 | .data = &unaligned_dump_stack, | |
1008 | .maxlen = sizeof (int), | |
1009 | .mode = 0644, | |
6d456111 | 1010 | .proc_handler = proc_dointvec, |
88fc241f | 1011 | }, |
bebfa101 | 1012 | #endif |
e162b39a MSB |
1013 | #ifdef CONFIG_DETECT_HUNG_TASK |
1014 | { | |
e162b39a MSB |
1015 | .procname = "hung_task_panic", |
1016 | .data = &sysctl_hung_task_panic, | |
1017 | .maxlen = sizeof(int), | |
1018 | .mode = 0644, | |
6d456111 | 1019 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1020 | .extra1 = &zero, |
1021 | .extra2 = &one, | |
1022 | }, | |
82a1fcb9 | 1023 | { |
82a1fcb9 IM |
1024 | .procname = "hung_task_check_count", |
1025 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1026 | .maxlen = sizeof(int), |
82a1fcb9 | 1027 | .mode = 0644, |
cd64647f LZ |
1028 | .proc_handler = proc_dointvec_minmax, |
1029 | .extra1 = &zero, | |
82a1fcb9 IM |
1030 | }, |
1031 | { | |
82a1fcb9 IM |
1032 | .procname = "hung_task_timeout_secs", |
1033 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1034 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1035 | .mode = 0644, |
6d456111 | 1036 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1037 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1038 | }, |
1039 | { | |
82a1fcb9 IM |
1040 | .procname = "hung_task_warnings", |
1041 | .data = &sysctl_hung_task_warnings, | |
270750db | 1042 | .maxlen = sizeof(int), |
82a1fcb9 | 1043 | .mode = 0644, |
270750db AT |
1044 | .proc_handler = proc_dointvec_minmax, |
1045 | .extra1 = &neg_one, | |
82a1fcb9 | 1046 | }, |
c4f3b63f | 1047 | #endif |
bebfa101 AK |
1048 | #ifdef CONFIG_COMPAT |
1049 | { | |
bebfa101 AK |
1050 | .procname = "compat-log", |
1051 | .data = &compat_log, | |
1052 | .maxlen = sizeof (int), | |
1053 | .mode = 0644, | |
6d456111 | 1054 | .proc_handler = proc_dointvec, |
bebfa101 | 1055 | }, |
951f22d5 | 1056 | #endif |
23f78d4a IM |
1057 | #ifdef CONFIG_RT_MUTEXES |
1058 | { | |
23f78d4a IM |
1059 | .procname = "max_lock_depth", |
1060 | .data = &max_lock_depth, | |
1061 | .maxlen = sizeof(int), | |
1062 | .mode = 0644, | |
6d456111 | 1063 | .proc_handler = proc_dointvec, |
23f78d4a | 1064 | }, |
5096add8 | 1065 | #endif |
10a0a8d4 | 1066 | { |
10a0a8d4 JF |
1067 | .procname = "poweroff_cmd", |
1068 | .data = &poweroff_cmd, | |
1069 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1070 | .mode = 0644, | |
6d456111 | 1071 | .proc_handler = proc_dostring, |
10a0a8d4 | 1072 | }, |
0b77f5bf DH |
1073 | #ifdef CONFIG_KEYS |
1074 | { | |
0b77f5bf DH |
1075 | .procname = "keys", |
1076 | .mode = 0555, | |
1077 | .child = key_sysctls, | |
1078 | }, | |
1079 | #endif | |
cdd6c482 | 1080 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1081 | /* |
1082 | * User-space scripts rely on the existence of this file | |
1083 | * as a feature check for perf_events being enabled. | |
1084 | * | |
1085 | * So it's an ABI, do not remove! | |
1086 | */ | |
1ccd1549 | 1087 | { |
cdd6c482 IM |
1088 | .procname = "perf_event_paranoid", |
1089 | .data = &sysctl_perf_event_paranoid, | |
1090 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1091 | .mode = 0644, |
6d456111 | 1092 | .proc_handler = proc_dointvec, |
1ccd1549 | 1093 | }, |
c5078f78 | 1094 | { |
cdd6c482 IM |
1095 | .procname = "perf_event_mlock_kb", |
1096 | .data = &sysctl_perf_event_mlock, | |
1097 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1098 | .mode = 0644, |
6d456111 | 1099 | .proc_handler = proc_dointvec, |
c5078f78 | 1100 | }, |
a78ac325 | 1101 | { |
cdd6c482 IM |
1102 | .procname = "perf_event_max_sample_rate", |
1103 | .data = &sysctl_perf_event_sample_rate, | |
1104 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1105 | .mode = 0644, |
163ec435 | 1106 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1107 | .extra1 = &one, |
a78ac325 | 1108 | }, |
14c63f17 DH |
1109 | { |
1110 | .procname = "perf_cpu_time_max_percent", | |
1111 | .data = &sysctl_perf_cpu_time_max_percent, | |
1112 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1113 | .mode = 0644, | |
1114 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1115 | .extra1 = &zero, | |
1116 | .extra2 = &one_hundred, | |
1117 | }, | |
1ccd1549 | 1118 | #endif |
dfec072e VN |
1119 | #ifdef CONFIG_KMEMCHECK |
1120 | { | |
dfec072e VN |
1121 | .procname = "kmemcheck", |
1122 | .data = &kmemcheck_enabled, | |
1123 | .maxlen = sizeof(int), | |
1124 | .mode = 0644, | |
6d456111 | 1125 | .proc_handler = proc_dointvec, |
dfec072e | 1126 | }, |
cb684b5b | 1127 | #endif |
9e3961a0 PB |
1128 | { |
1129 | .procname = "panic_on_warn", | |
1130 | .data = &panic_on_warn, | |
1131 | .maxlen = sizeof(int), | |
1132 | .mode = 0644, | |
1133 | .proc_handler = proc_dointvec_minmax, | |
1134 | .extra1 = &zero, | |
1135 | .extra2 = &one, | |
1136 | }, | |
6fce56ec | 1137 | { } |
1da177e4 LT |
1138 | }; |
1139 | ||
d8217f07 | 1140 | static struct ctl_table vm_table[] = { |
1da177e4 | 1141 | { |
1da177e4 LT |
1142 | .procname = "overcommit_memory", |
1143 | .data = &sysctl_overcommit_memory, | |
1144 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1145 | .mode = 0644, | |
cb16e95f PH |
1146 | .proc_handler = proc_dointvec_minmax, |
1147 | .extra1 = &zero, | |
1148 | .extra2 = &two, | |
1da177e4 | 1149 | }, |
fadd8fbd | 1150 | { |
fadd8fbd KH |
1151 | .procname = "panic_on_oom", |
1152 | .data = &sysctl_panic_on_oom, | |
1153 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1154 | .mode = 0644, | |
cb16e95f PH |
1155 | .proc_handler = proc_dointvec_minmax, |
1156 | .extra1 = &zero, | |
1157 | .extra2 = &two, | |
fadd8fbd | 1158 | }, |
fe071d7e | 1159 | { |
fe071d7e DR |
1160 | .procname = "oom_kill_allocating_task", |
1161 | .data = &sysctl_oom_kill_allocating_task, | |
1162 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1163 | .mode = 0644, | |
6d456111 | 1164 | .proc_handler = proc_dointvec, |
fe071d7e | 1165 | }, |
fef1bdd6 | 1166 | { |
fef1bdd6 DR |
1167 | .procname = "oom_dump_tasks", |
1168 | .data = &sysctl_oom_dump_tasks, | |
1169 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1170 | .mode = 0644, | |
6d456111 | 1171 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1172 | }, |
1da177e4 | 1173 | { |
1da177e4 LT |
1174 | .procname = "overcommit_ratio", |
1175 | .data = &sysctl_overcommit_ratio, | |
1176 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1177 | .mode = 0644, | |
49f0ce5f JM |
1178 | .proc_handler = overcommit_ratio_handler, |
1179 | }, | |
1180 | { | |
1181 | .procname = "overcommit_kbytes", | |
1182 | .data = &sysctl_overcommit_kbytes, | |
1183 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1184 | .mode = 0644, | |
1185 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1186 | }, |
1187 | { | |
1da177e4 LT |
1188 | .procname = "page-cluster", |
1189 | .data = &page_cluster, | |
1190 | .maxlen = sizeof(int), | |
1191 | .mode = 0644, | |
cb16e95f PH |
1192 | .proc_handler = proc_dointvec_minmax, |
1193 | .extra1 = &zero, | |
1da177e4 LT |
1194 | }, |
1195 | { | |
1da177e4 LT |
1196 | .procname = "dirty_background_ratio", |
1197 | .data = &dirty_background_ratio, | |
1198 | .maxlen = sizeof(dirty_background_ratio), | |
1199 | .mode = 0644, | |
6d456111 | 1200 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1201 | .extra1 = &zero, |
1202 | .extra2 = &one_hundred, | |
1203 | }, | |
2da02997 | 1204 | { |
2da02997 DR |
1205 | .procname = "dirty_background_bytes", |
1206 | .data = &dirty_background_bytes, | |
1207 | .maxlen = sizeof(dirty_background_bytes), | |
1208 | .mode = 0644, | |
6d456111 | 1209 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1210 | .extra1 = &one_ul, |
2da02997 | 1211 | }, |
1da177e4 | 1212 | { |
1da177e4 LT |
1213 | .procname = "dirty_ratio", |
1214 | .data = &vm_dirty_ratio, | |
1215 | .maxlen = sizeof(vm_dirty_ratio), | |
1216 | .mode = 0644, | |
6d456111 | 1217 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1218 | .extra1 = &zero, |
1219 | .extra2 = &one_hundred, | |
1220 | }, | |
2da02997 | 1221 | { |
2da02997 DR |
1222 | .procname = "dirty_bytes", |
1223 | .data = &vm_dirty_bytes, | |
1224 | .maxlen = sizeof(vm_dirty_bytes), | |
1225 | .mode = 0644, | |
6d456111 | 1226 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1227 | .extra1 = &dirty_bytes_min, |
2da02997 | 1228 | }, |
1da177e4 | 1229 | { |
1da177e4 | 1230 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1231 | .data = &dirty_writeback_interval, |
1232 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1233 | .mode = 0644, |
6d456111 | 1234 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1235 | }, |
1236 | { | |
1da177e4 | 1237 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1238 | .data = &dirty_expire_interval, |
1239 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1240 | .mode = 0644, |
cb16e95f PH |
1241 | .proc_handler = proc_dointvec_minmax, |
1242 | .extra1 = &zero, | |
1da177e4 | 1243 | }, |
1efff914 TT |
1244 | { |
1245 | .procname = "dirtytime_expire_seconds", | |
1246 | .data = &dirtytime_expire_interval, | |
1247 | .maxlen = sizeof(dirty_expire_interval), | |
1248 | .mode = 0644, | |
1249 | .proc_handler = dirtytime_interval_handler, | |
1250 | .extra1 = &zero, | |
1251 | }, | |
1da177e4 | 1252 | { |
3965c9ae WL |
1253 | .procname = "nr_pdflush_threads", |
1254 | .mode = 0444 /* read-only */, | |
1255 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1256 | }, |
1257 | { | |
1da177e4 LT |
1258 | .procname = "swappiness", |
1259 | .data = &vm_swappiness, | |
1260 | .maxlen = sizeof(vm_swappiness), | |
1261 | .mode = 0644, | |
6d456111 | 1262 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1263 | .extra1 = &zero, |
1264 | .extra2 = &one_hundred, | |
1265 | }, | |
1266 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1267 | { |
1da177e4 | 1268 | .procname = "nr_hugepages", |
e5ff2159 | 1269 | .data = NULL, |
1da177e4 LT |
1270 | .maxlen = sizeof(unsigned long), |
1271 | .mode = 0644, | |
6d456111 | 1272 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1273 | }, |
1274 | #ifdef CONFIG_NUMA | |
1275 | { | |
1276 | .procname = "nr_hugepages_mempolicy", | |
1277 | .data = NULL, | |
1278 | .maxlen = sizeof(unsigned long), | |
1279 | .mode = 0644, | |
1280 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 LS |
1281 | }, |
1282 | #endif | |
1da177e4 | 1283 | { |
1da177e4 LT |
1284 | .procname = "hugetlb_shm_group", |
1285 | .data = &sysctl_hugetlb_shm_group, | |
1286 | .maxlen = sizeof(gid_t), | |
1287 | .mode = 0644, | |
6d456111 | 1288 | .proc_handler = proc_dointvec, |
1da177e4 | 1289 | }, |
396faf03 | 1290 | { |
396faf03 MG |
1291 | .procname = "hugepages_treat_as_movable", |
1292 | .data = &hugepages_treat_as_movable, | |
1293 | .maxlen = sizeof(int), | |
1294 | .mode = 0644, | |
86cdb465 | 1295 | .proc_handler = proc_dointvec, |
396faf03 | 1296 | }, |
d1c3fb1f | 1297 | { |
d1c3fb1f | 1298 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1299 | .data = NULL, |
1300 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1301 | .mode = 0644, |
6d456111 | 1302 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1303 | }, |
1da177e4 LT |
1304 | #endif |
1305 | { | |
1da177e4 LT |
1306 | .procname = "lowmem_reserve_ratio", |
1307 | .data = &sysctl_lowmem_reserve_ratio, | |
1308 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1309 | .mode = 0644, | |
6d456111 | 1310 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1311 | }, |
9d0243bc | 1312 | { |
9d0243bc AM |
1313 | .procname = "drop_caches", |
1314 | .data = &sysctl_drop_caches, | |
1315 | .maxlen = sizeof(int), | |
1316 | .mode = 0644, | |
1317 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1318 | .extra1 = &one, |
5509a5d2 | 1319 | .extra2 = &four, |
9d0243bc | 1320 | }, |
76ab0f53 MG |
1321 | #ifdef CONFIG_COMPACTION |
1322 | { | |
1323 | .procname = "compact_memory", | |
1324 | .data = &sysctl_compact_memory, | |
1325 | .maxlen = sizeof(int), | |
1326 | .mode = 0200, | |
1327 | .proc_handler = sysctl_compaction_handler, | |
1328 | }, | |
5e771905 MG |
1329 | { |
1330 | .procname = "extfrag_threshold", | |
1331 | .data = &sysctl_extfrag_threshold, | |
1332 | .maxlen = sizeof(int), | |
1333 | .mode = 0644, | |
1334 | .proc_handler = sysctl_extfrag_handler, | |
1335 | .extra1 = &min_extfrag_threshold, | |
1336 | .extra2 = &max_extfrag_threshold, | |
1337 | }, | |
1338 | ||
76ab0f53 | 1339 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1340 | { |
1da177e4 LT |
1341 | .procname = "min_free_kbytes", |
1342 | .data = &min_free_kbytes, | |
1343 | .maxlen = sizeof(min_free_kbytes), | |
1344 | .mode = 0644, | |
6d456111 | 1345 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1346 | .extra1 = &zero, |
1347 | }, | |
8ad4b1fb | 1348 | { |
8ad4b1fb RS |
1349 | .procname = "percpu_pagelist_fraction", |
1350 | .data = &percpu_pagelist_fraction, | |
1351 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1352 | .mode = 0644, | |
6d456111 | 1353 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1354 | .extra1 = &zero, |
8ad4b1fb | 1355 | }, |
1da177e4 LT |
1356 | #ifdef CONFIG_MMU |
1357 | { | |
1da177e4 LT |
1358 | .procname = "max_map_count", |
1359 | .data = &sysctl_max_map_count, | |
1360 | .maxlen = sizeof(sysctl_max_map_count), | |
1361 | .mode = 0644, | |
3e26120c | 1362 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1363 | .extra1 = &zero, |
1da177e4 | 1364 | }, |
dd8632a1 PM |
1365 | #else |
1366 | { | |
dd8632a1 PM |
1367 | .procname = "nr_trim_pages", |
1368 | .data = &sysctl_nr_trim_pages, | |
1369 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1370 | .mode = 0644, | |
6d456111 | 1371 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1372 | .extra1 = &zero, |
1373 | }, | |
1da177e4 LT |
1374 | #endif |
1375 | { | |
1da177e4 LT |
1376 | .procname = "laptop_mode", |
1377 | .data = &laptop_mode, | |
1378 | .maxlen = sizeof(laptop_mode), | |
1379 | .mode = 0644, | |
6d456111 | 1380 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1381 | }, |
1382 | { | |
1da177e4 LT |
1383 | .procname = "block_dump", |
1384 | .data = &block_dump, | |
1385 | .maxlen = sizeof(block_dump), | |
1386 | .mode = 0644, | |
6d456111 | 1387 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1388 | .extra1 = &zero, |
1389 | }, | |
1390 | { | |
1da177e4 LT |
1391 | .procname = "vfs_cache_pressure", |
1392 | .data = &sysctl_vfs_cache_pressure, | |
1393 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1394 | .mode = 0644, | |
6d456111 | 1395 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1396 | .extra1 = &zero, |
1397 | }, | |
1398 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1399 | { | |
1da177e4 LT |
1400 | .procname = "legacy_va_layout", |
1401 | .data = &sysctl_legacy_va_layout, | |
1402 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1403 | .mode = 0644, | |
6d456111 | 1404 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1405 | .extra1 = &zero, |
1406 | }, | |
1407 | #endif | |
1743660b CL |
1408 | #ifdef CONFIG_NUMA |
1409 | { | |
1743660b CL |
1410 | .procname = "zone_reclaim_mode", |
1411 | .data = &zone_reclaim_mode, | |
1412 | .maxlen = sizeof(zone_reclaim_mode), | |
1413 | .mode = 0644, | |
6d456111 | 1414 | .proc_handler = proc_dointvec, |
c84db23c | 1415 | .extra1 = &zero, |
1743660b | 1416 | }, |
9614634f | 1417 | { |
9614634f CL |
1418 | .procname = "min_unmapped_ratio", |
1419 | .data = &sysctl_min_unmapped_ratio, | |
1420 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1421 | .mode = 0644, | |
6d456111 | 1422 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1423 | .extra1 = &zero, |
1424 | .extra2 = &one_hundred, | |
1425 | }, | |
0ff38490 | 1426 | { |
0ff38490 CL |
1427 | .procname = "min_slab_ratio", |
1428 | .data = &sysctl_min_slab_ratio, | |
1429 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1430 | .mode = 0644, | |
6d456111 | 1431 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1432 | .extra1 = &zero, |
1433 | .extra2 = &one_hundred, | |
1434 | }, | |
e6e5494c | 1435 | #endif |
77461ab3 CL |
1436 | #ifdef CONFIG_SMP |
1437 | { | |
77461ab3 CL |
1438 | .procname = "stat_interval", |
1439 | .data = &sysctl_stat_interval, | |
1440 | .maxlen = sizeof(sysctl_stat_interval), | |
1441 | .mode = 0644, | |
6d456111 | 1442 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1443 | }, |
1444 | #endif | |
6e141546 | 1445 | #ifdef CONFIG_MMU |
ed032189 | 1446 | { |
ed032189 | 1447 | .procname = "mmap_min_addr", |
788084ab EP |
1448 | .data = &dac_mmap_min_addr, |
1449 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1450 | .mode = 0644, |
6d456111 | 1451 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1452 | }, |
6e141546 | 1453 | #endif |
f0c0b2b8 KH |
1454 | #ifdef CONFIG_NUMA |
1455 | { | |
f0c0b2b8 KH |
1456 | .procname = "numa_zonelist_order", |
1457 | .data = &numa_zonelist_order, | |
1458 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1459 | .mode = 0644, | |
6d456111 | 1460 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1461 | }, |
1462 | #endif | |
2b8232ce | 1463 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1464 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1465 | { |
e6e5494c | 1466 | .procname = "vdso_enabled", |
3d7ee969 AL |
1467 | #ifdef CONFIG_X86_32 |
1468 | .data = &vdso32_enabled, | |
1469 | .maxlen = sizeof(vdso32_enabled), | |
1470 | #else | |
e6e5494c IM |
1471 | .data = &vdso_enabled, |
1472 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1473 | #endif |
e6e5494c | 1474 | .mode = 0644, |
6d456111 | 1475 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1476 | .extra1 = &zero, |
1477 | }, | |
1da177e4 | 1478 | #endif |
195cf453 BG |
1479 | #ifdef CONFIG_HIGHMEM |
1480 | { | |
195cf453 BG |
1481 | .procname = "highmem_is_dirtyable", |
1482 | .data = &vm_highmem_is_dirtyable, | |
1483 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1484 | .mode = 0644, | |
6d456111 | 1485 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1486 | .extra1 = &zero, |
1487 | .extra2 = &one, | |
1488 | }, | |
1489 | #endif | |
6a46079c AK |
1490 | #ifdef CONFIG_MEMORY_FAILURE |
1491 | { | |
6a46079c AK |
1492 | .procname = "memory_failure_early_kill", |
1493 | .data = &sysctl_memory_failure_early_kill, | |
1494 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1495 | .mode = 0644, | |
6d456111 | 1496 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1497 | .extra1 = &zero, |
1498 | .extra2 = &one, | |
1499 | }, | |
1500 | { | |
6a46079c AK |
1501 | .procname = "memory_failure_recovery", |
1502 | .data = &sysctl_memory_failure_recovery, | |
1503 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1504 | .mode = 0644, | |
6d456111 | 1505 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1506 | .extra1 = &zero, |
1507 | .extra2 = &one, | |
1508 | }, | |
1509 | #endif | |
c9b1d098 AS |
1510 | { |
1511 | .procname = "user_reserve_kbytes", | |
1512 | .data = &sysctl_user_reserve_kbytes, | |
1513 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1514 | .mode = 0644, | |
1515 | .proc_handler = proc_doulongvec_minmax, | |
1516 | }, | |
4eeab4f5 AS |
1517 | { |
1518 | .procname = "admin_reserve_kbytes", | |
1519 | .data = &sysctl_admin_reserve_kbytes, | |
1520 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1521 | .mode = 0644, | |
1522 | .proc_handler = proc_doulongvec_minmax, | |
1523 | }, | |
6fce56ec | 1524 | { } |
1da177e4 LT |
1525 | }; |
1526 | ||
2abc26fc | 1527 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1528 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1529 | { } |
2abc26fc EB |
1530 | }; |
1531 | #endif | |
1532 | ||
d8217f07 | 1533 | static struct ctl_table fs_table[] = { |
1da177e4 | 1534 | { |
1da177e4 LT |
1535 | .procname = "inode-nr", |
1536 | .data = &inodes_stat, | |
3942c07c | 1537 | .maxlen = 2*sizeof(long), |
1da177e4 | 1538 | .mode = 0444, |
cffbc8aa | 1539 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1540 | }, |
1541 | { | |
1da177e4 LT |
1542 | .procname = "inode-state", |
1543 | .data = &inodes_stat, | |
3942c07c | 1544 | .maxlen = 7*sizeof(long), |
1da177e4 | 1545 | .mode = 0444, |
cffbc8aa | 1546 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1547 | }, |
1548 | { | |
1da177e4 LT |
1549 | .procname = "file-nr", |
1550 | .data = &files_stat, | |
518de9b3 | 1551 | .maxlen = sizeof(files_stat), |
1da177e4 | 1552 | .mode = 0444, |
6d456111 | 1553 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1554 | }, |
1555 | { | |
1da177e4 LT |
1556 | .procname = "file-max", |
1557 | .data = &files_stat.max_files, | |
518de9b3 | 1558 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1559 | .mode = 0644, |
518de9b3 | 1560 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1561 | }, |
9cfe015a | 1562 | { |
9cfe015a ED |
1563 | .procname = "nr_open", |
1564 | .data = &sysctl_nr_open, | |
1565 | .maxlen = sizeof(int), | |
1566 | .mode = 0644, | |
6d456111 | 1567 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1568 | .extra1 = &sysctl_nr_open_min, |
1569 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1570 | }, |
1da177e4 | 1571 | { |
1da177e4 LT |
1572 | .procname = "dentry-state", |
1573 | .data = &dentry_stat, | |
3942c07c | 1574 | .maxlen = 6*sizeof(long), |
1da177e4 | 1575 | .mode = 0444, |
312d3ca8 | 1576 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1577 | }, |
1578 | { | |
1da177e4 LT |
1579 | .procname = "overflowuid", |
1580 | .data = &fs_overflowuid, | |
1581 | .maxlen = sizeof(int), | |
1582 | .mode = 0644, | |
6d456111 | 1583 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1584 | .extra1 = &minolduid, |
1585 | .extra2 = &maxolduid, | |
1586 | }, | |
1587 | { | |
1da177e4 LT |
1588 | .procname = "overflowgid", |
1589 | .data = &fs_overflowgid, | |
1590 | .maxlen = sizeof(int), | |
1591 | .mode = 0644, | |
6d456111 | 1592 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1593 | .extra1 = &minolduid, |
1594 | .extra2 = &maxolduid, | |
1595 | }, | |
bfcd17a6 | 1596 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1597 | { |
1da177e4 LT |
1598 | .procname = "leases-enable", |
1599 | .data = &leases_enable, | |
1600 | .maxlen = sizeof(int), | |
1601 | .mode = 0644, | |
6d456111 | 1602 | .proc_handler = proc_dointvec, |
1da177e4 | 1603 | }, |
bfcd17a6 | 1604 | #endif |
1da177e4 LT |
1605 | #ifdef CONFIG_DNOTIFY |
1606 | { | |
1da177e4 LT |
1607 | .procname = "dir-notify-enable", |
1608 | .data = &dir_notify_enable, | |
1609 | .maxlen = sizeof(int), | |
1610 | .mode = 0644, | |
6d456111 | 1611 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1612 | }, |
1613 | #endif | |
1614 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1615 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1616 | { |
1da177e4 LT |
1617 | .procname = "lease-break-time", |
1618 | .data = &lease_break_time, | |
1619 | .maxlen = sizeof(int), | |
1620 | .mode = 0644, | |
6d456111 | 1621 | .proc_handler = proc_dointvec, |
1da177e4 | 1622 | }, |
bfcd17a6 | 1623 | #endif |
ebf3f09c | 1624 | #ifdef CONFIG_AIO |
1da177e4 | 1625 | { |
1da177e4 LT |
1626 | .procname = "aio-nr", |
1627 | .data = &aio_nr, | |
1628 | .maxlen = sizeof(aio_nr), | |
1629 | .mode = 0444, | |
6d456111 | 1630 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1631 | }, |
1632 | { | |
1da177e4 LT |
1633 | .procname = "aio-max-nr", |
1634 | .data = &aio_max_nr, | |
1635 | .maxlen = sizeof(aio_max_nr), | |
1636 | .mode = 0644, | |
6d456111 | 1637 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1638 | }, |
ebf3f09c | 1639 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1640 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1641 | { |
0399cb08 RL |
1642 | .procname = "inotify", |
1643 | .mode = 0555, | |
1644 | .child = inotify_table, | |
1645 | }, | |
1646 | #endif | |
7ef9964e DL |
1647 | #ifdef CONFIG_EPOLL |
1648 | { | |
1649 | .procname = "epoll", | |
1650 | .mode = 0555, | |
1651 | .child = epoll_table, | |
1652 | }, | |
1653 | #endif | |
1da177e4 | 1654 | #endif |
800179c9 KC |
1655 | { |
1656 | .procname = "protected_symlinks", | |
1657 | .data = &sysctl_protected_symlinks, | |
1658 | .maxlen = sizeof(int), | |
1659 | .mode = 0600, | |
1660 | .proc_handler = proc_dointvec_minmax, | |
1661 | .extra1 = &zero, | |
1662 | .extra2 = &one, | |
1663 | }, | |
1664 | { | |
1665 | .procname = "protected_hardlinks", | |
1666 | .data = &sysctl_protected_hardlinks, | |
1667 | .maxlen = sizeof(int), | |
1668 | .mode = 0600, | |
1669 | .proc_handler = proc_dointvec_minmax, | |
1670 | .extra1 = &zero, | |
1671 | .extra2 = &one, | |
1672 | }, | |
d6e71144 | 1673 | { |
d6e71144 AC |
1674 | .procname = "suid_dumpable", |
1675 | .data = &suid_dumpable, | |
1676 | .maxlen = sizeof(int), | |
1677 | .mode = 0644, | |
54b50199 | 1678 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1679 | .extra1 = &zero, |
1680 | .extra2 = &two, | |
d6e71144 | 1681 | }, |
2abc26fc EB |
1682 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1683 | { | |
2abc26fc EB |
1684 | .procname = "binfmt_misc", |
1685 | .mode = 0555, | |
1686 | .child = binfmt_misc_table, | |
1687 | }, | |
1688 | #endif | |
b492e95b | 1689 | { |
ff9da691 JA |
1690 | .procname = "pipe-max-size", |
1691 | .data = &pipe_max_size, | |
b492e95b JA |
1692 | .maxlen = sizeof(int), |
1693 | .mode = 0644, | |
ff9da691 JA |
1694 | .proc_handler = &pipe_proc_fn, |
1695 | .extra1 = &pipe_min_size, | |
b492e95b | 1696 | }, |
6fce56ec | 1697 | { } |
1da177e4 LT |
1698 | }; |
1699 | ||
d8217f07 | 1700 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1701 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1702 | { |
abd4f750 MAS |
1703 | .procname = "exception-trace", |
1704 | .data = &show_unhandled_signals, | |
1705 | .maxlen = sizeof(int), | |
1706 | .mode = 0644, | |
1707 | .proc_handler = proc_dointvec | |
1708 | }, | |
b2be84df MH |
1709 | #endif |
1710 | #if defined(CONFIG_OPTPROBES) | |
1711 | { | |
1712 | .procname = "kprobes-optimization", | |
1713 | .data = &sysctl_kprobes_optimization, | |
1714 | .maxlen = sizeof(int), | |
1715 | .mode = 0644, | |
1716 | .proc_handler = proc_kprobes_optimization_handler, | |
1717 | .extra1 = &zero, | |
1718 | .extra2 = &one, | |
1719 | }, | |
abd4f750 | 1720 | #endif |
6fce56ec | 1721 | { } |
1da177e4 LT |
1722 | }; |
1723 | ||
d8217f07 | 1724 | static struct ctl_table dev_table[] = { |
6fce56ec | 1725 | { } |
0eeca283 | 1726 | }; |
1da177e4 | 1727 | |
de4e83bd | 1728 | int __init sysctl_init(void) |
d912b0cc | 1729 | { |
fd4b616b SR |
1730 | struct ctl_table_header *hdr; |
1731 | ||
1732 | hdr = register_sysctl_table(sysctl_base_table); | |
1733 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1734 | return 0; |
1735 | } | |
1736 | ||
b89a8171 EB |
1737 | #endif /* CONFIG_SYSCTL */ |
1738 | ||
1da177e4 LT |
1739 | /* |
1740 | * /proc/sys support | |
1741 | */ | |
1742 | ||
b89a8171 | 1743 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1744 | |
f8808300 KC |
1745 | static int _proc_do_string(char *data, int maxlen, int write, |
1746 | char __user *buffer, | |
b1ba4ddd | 1747 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1748 | { |
1749 | size_t len; | |
1750 | char __user *p; | |
1751 | char c; | |
8d060877 ON |
1752 | |
1753 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1754 | *lenp = 0; |
1755 | return 0; | |
1756 | } | |
8d060877 | 1757 | |
1da177e4 | 1758 | if (write) { |
f4aacea2 KC |
1759 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1760 | /* Only continue writes not past the end of buffer. */ | |
1761 | len = strlen(data); | |
1762 | if (len > maxlen - 1) | |
1763 | len = maxlen - 1; | |
1764 | ||
1765 | if (*ppos > len) | |
1766 | return 0; | |
1767 | len = *ppos; | |
1768 | } else { | |
1769 | /* Start writing from beginning of buffer. */ | |
1770 | len = 0; | |
1771 | } | |
1772 | ||
2ca9bb45 | 1773 | *ppos += *lenp; |
1da177e4 | 1774 | p = buffer; |
2ca9bb45 | 1775 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1776 | if (get_user(c, p++)) |
1777 | return -EFAULT; | |
1778 | if (c == 0 || c == '\n') | |
1779 | break; | |
2ca9bb45 | 1780 | data[len++] = c; |
1da177e4 | 1781 | } |
f8808300 | 1782 | data[len] = 0; |
1da177e4 | 1783 | } else { |
f5dd3d6f SV |
1784 | len = strlen(data); |
1785 | if (len > maxlen) | |
1786 | len = maxlen; | |
8d060877 ON |
1787 | |
1788 | if (*ppos > len) { | |
1789 | *lenp = 0; | |
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | data += *ppos; | |
1794 | len -= *ppos; | |
1795 | ||
1da177e4 LT |
1796 | if (len > *lenp) |
1797 | len = *lenp; | |
1798 | if (len) | |
f8808300 | 1799 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1800 | return -EFAULT; |
1801 | if (len < *lenp) { | |
f8808300 | 1802 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1803 | return -EFAULT; |
1804 | len++; | |
1805 | } | |
1806 | *lenp = len; | |
1807 | *ppos += len; | |
1808 | } | |
1809 | return 0; | |
1810 | } | |
1811 | ||
f4aacea2 KC |
1812 | static void warn_sysctl_write(struct ctl_table *table) |
1813 | { | |
1814 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1815 | "This will not be supported in the future. To silence this\n" | |
1816 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1817 | current->comm, table->procname); | |
1818 | } | |
1819 | ||
f5dd3d6f SV |
1820 | /** |
1821 | * proc_dostring - read a string sysctl | |
1822 | * @table: the sysctl table | |
1823 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1824 | * @buffer: the user buffer |
1825 | * @lenp: the size of the user buffer | |
1826 | * @ppos: file position | |
1827 | * | |
1828 | * Reads/writes a string from/to the user buffer. If the kernel | |
1829 | * buffer provided is not large enough to hold the string, the | |
1830 | * string is truncated. The copied string is %NULL-terminated. | |
1831 | * If the string is being read by the user process, it is copied | |
1832 | * and a newline '\n' is added. It is truncated if the buffer is | |
1833 | * not large enough. | |
1834 | * | |
1835 | * Returns 0 on success. | |
1836 | */ | |
8d65af78 | 1837 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1838 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1839 | { | |
f4aacea2 KC |
1840 | if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) |
1841 | warn_sysctl_write(table); | |
1842 | ||
f8808300 KC |
1843 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
1844 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
1845 | } |
1846 | ||
00b7c339 AW |
1847 | static size_t proc_skip_spaces(char **buf) |
1848 | { | |
1849 | size_t ret; | |
1850 | char *tmp = skip_spaces(*buf); | |
1851 | ret = tmp - *buf; | |
1852 | *buf = tmp; | |
1853 | return ret; | |
1854 | } | |
1855 | ||
9f977fb7 OP |
1856 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1857 | { | |
1858 | while (*size) { | |
1859 | if (**buf != v) | |
1860 | break; | |
1861 | (*size)--; | |
1862 | (*buf)++; | |
1863 | } | |
1864 | } | |
1865 | ||
00b7c339 AW |
1866 | #define TMPBUFLEN 22 |
1867 | /** | |
0fc377bd | 1868 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1869 | * |
0fc377bd RD |
1870 | * @buf: a kernel buffer |
1871 | * @size: size of the kernel buffer | |
1872 | * @val: this is where the number will be stored | |
1873 | * @neg: set to %TRUE if number is negative | |
1874 | * @perm_tr: a vector which contains the allowed trailers | |
1875 | * @perm_tr_len: size of the perm_tr vector | |
1876 | * @tr: pointer to store the trailer character | |
00b7c339 | 1877 | * |
0fc377bd RD |
1878 | * In case of success %0 is returned and @buf and @size are updated with |
1879 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1880 | * character exists (size is non-zero after returning from this | |
1881 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1882 | */ |
1883 | static int proc_get_long(char **buf, size_t *size, | |
1884 | unsigned long *val, bool *neg, | |
1885 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1886 | { | |
1887 | int len; | |
1888 | char *p, tmp[TMPBUFLEN]; | |
1889 | ||
1890 | if (!*size) | |
1891 | return -EINVAL; | |
1892 | ||
1893 | len = *size; | |
1894 | if (len > TMPBUFLEN - 1) | |
1895 | len = TMPBUFLEN - 1; | |
1896 | ||
1897 | memcpy(tmp, *buf, len); | |
1898 | ||
1899 | tmp[len] = 0; | |
1900 | p = tmp; | |
1901 | if (*p == '-' && *size > 1) { | |
1902 | *neg = true; | |
1903 | p++; | |
1904 | } else | |
1905 | *neg = false; | |
1906 | if (!isdigit(*p)) | |
1907 | return -EINVAL; | |
1908 | ||
1909 | *val = simple_strtoul(p, &p, 0); | |
1910 | ||
1911 | len = p - tmp; | |
1912 | ||
1913 | /* We don't know if the next char is whitespace thus we may accept | |
1914 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
1915 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
1916 | if (len == TMPBUFLEN - 1) | |
1917 | return -EINVAL; | |
1918 | ||
1919 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
1920 | return -EINVAL; | |
1da177e4 | 1921 | |
00b7c339 AW |
1922 | if (tr && (len < *size)) |
1923 | *tr = *p; | |
1924 | ||
1925 | *buf += len; | |
1926 | *size -= len; | |
1927 | ||
1928 | return 0; | |
1929 | } | |
1930 | ||
1931 | /** | |
0fc377bd | 1932 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 1933 | * |
0fc377bd RD |
1934 | * @buf: the user buffer |
1935 | * @size: the size of the user buffer | |
1936 | * @val: the integer to be converted | |
1937 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 1938 | * |
0fc377bd RD |
1939 | * In case of success %0 is returned and @buf and @size are updated with |
1940 | * the amount of bytes written. | |
00b7c339 AW |
1941 | */ |
1942 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
1943 | bool neg) | |
1944 | { | |
1945 | int len; | |
1946 | char tmp[TMPBUFLEN], *p = tmp; | |
1947 | ||
1948 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
1949 | len = strlen(tmp); | |
1950 | if (len > *size) | |
1951 | len = *size; | |
1952 | if (copy_to_user(*buf, tmp, len)) | |
1953 | return -EFAULT; | |
1954 | *size -= len; | |
1955 | *buf += len; | |
1956 | return 0; | |
1957 | } | |
1958 | #undef TMPBUFLEN | |
1959 | ||
1960 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
1961 | { | |
1962 | if (*size) { | |
1963 | char __user **buffer = (char __user **)buf; | |
1964 | if (put_user(c, *buffer)) | |
1965 | return -EFAULT; | |
1966 | (*size)--, (*buffer)++; | |
1967 | *buf = *buffer; | |
1968 | } | |
1969 | return 0; | |
1970 | } | |
1da177e4 | 1971 | |
00b7c339 | 1972 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1973 | int *valp, |
1974 | int write, void *data) | |
1975 | { | |
1976 | if (write) { | |
1977 | *valp = *negp ? -*lvalp : *lvalp; | |
1978 | } else { | |
1979 | int val = *valp; | |
1980 | if (val < 0) { | |
00b7c339 | 1981 | *negp = true; |
1da177e4 LT |
1982 | *lvalp = (unsigned long)-val; |
1983 | } else { | |
00b7c339 | 1984 | *negp = false; |
1da177e4 LT |
1985 | *lvalp = (unsigned long)val; |
1986 | } | |
1987 | } | |
1988 | return 0; | |
1989 | } | |
1990 | ||
00b7c339 AW |
1991 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
1992 | ||
d8217f07 | 1993 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 1994 | int write, void __user *buffer, |
fcfbd547 | 1995 | size_t *lenp, loff_t *ppos, |
00b7c339 | 1996 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
1997 | int write, void *data), |
1998 | void *data) | |
1999 | { | |
00b7c339 AW |
2000 | int *i, vleft, first = 1, err = 0; |
2001 | unsigned long page = 0; | |
2002 | size_t left; | |
2003 | char *kbuf; | |
1da177e4 | 2004 | |
00b7c339 | 2005 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2006 | *lenp = 0; |
2007 | return 0; | |
2008 | } | |
2009 | ||
fcfbd547 | 2010 | i = (int *) tbl_data; |
1da177e4 LT |
2011 | vleft = table->maxlen / sizeof(*i); |
2012 | left = *lenp; | |
2013 | ||
2014 | if (!conv) | |
2015 | conv = do_proc_dointvec_conv; | |
2016 | ||
00b7c339 | 2017 | if (write) { |
f4aacea2 KC |
2018 | if (*ppos) { |
2019 | switch (sysctl_writes_strict) { | |
2020 | case SYSCTL_WRITES_STRICT: | |
2021 | goto out; | |
2022 | case SYSCTL_WRITES_WARN: | |
2023 | warn_sysctl_write(table); | |
2024 | break; | |
2025 | default: | |
2026 | break; | |
2027 | } | |
2028 | } | |
2029 | ||
00b7c339 AW |
2030 | if (left > PAGE_SIZE - 1) |
2031 | left = PAGE_SIZE - 1; | |
2032 | page = __get_free_page(GFP_TEMPORARY); | |
2033 | kbuf = (char *) page; | |
2034 | if (!kbuf) | |
2035 | return -ENOMEM; | |
2036 | if (copy_from_user(kbuf, buffer, left)) { | |
2037 | err = -EFAULT; | |
2038 | goto free; | |
2039 | } | |
2040 | kbuf[left] = 0; | |
2041 | } | |
2042 | ||
1da177e4 | 2043 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2044 | unsigned long lval; |
2045 | bool neg; | |
1da177e4 | 2046 | |
00b7c339 AW |
2047 | if (write) { |
2048 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 2049 | |
563b0467 O |
2050 | if (!left) |
2051 | break; | |
00b7c339 AW |
2052 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
2053 | proc_wspace_sep, | |
2054 | sizeof(proc_wspace_sep), NULL); | |
2055 | if (err) | |
1da177e4 | 2056 | break; |
00b7c339 AW |
2057 | if (conv(&neg, &lval, i, 1, data)) { |
2058 | err = -EINVAL; | |
1da177e4 | 2059 | break; |
00b7c339 | 2060 | } |
1da177e4 | 2061 | } else { |
00b7c339 AW |
2062 | if (conv(&neg, &lval, i, 0, data)) { |
2063 | err = -EINVAL; | |
2064 | break; | |
2065 | } | |
1da177e4 | 2066 | if (!first) |
00b7c339 AW |
2067 | err = proc_put_char(&buffer, &left, '\t'); |
2068 | if (err) | |
2069 | break; | |
2070 | err = proc_put_long(&buffer, &left, lval, neg); | |
2071 | if (err) | |
1da177e4 | 2072 | break; |
1da177e4 LT |
2073 | } |
2074 | } | |
2075 | ||
00b7c339 AW |
2076 | if (!write && !first && left && !err) |
2077 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2078 | if (write && !err && left) |
00b7c339 AW |
2079 | left -= proc_skip_spaces(&kbuf); |
2080 | free: | |
1da177e4 | 2081 | if (write) { |
00b7c339 AW |
2082 | free_page(page); |
2083 | if (first) | |
2084 | return err ? : -EINVAL; | |
1da177e4 | 2085 | } |
1da177e4 | 2086 | *lenp -= left; |
f4aacea2 | 2087 | out: |
1da177e4 | 2088 | *ppos += *lenp; |
00b7c339 | 2089 | return err; |
1da177e4 LT |
2090 | } |
2091 | ||
8d65af78 | 2092 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2093 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2094 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2095 | int write, void *data), |
2096 | void *data) | |
2097 | { | |
8d65af78 | 2098 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2099 | buffer, lenp, ppos, conv, data); |
2100 | } | |
2101 | ||
1da177e4 LT |
2102 | /** |
2103 | * proc_dointvec - read a vector of integers | |
2104 | * @table: the sysctl table | |
2105 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2106 | * @buffer: the user buffer |
2107 | * @lenp: the size of the user buffer | |
2108 | * @ppos: file position | |
2109 | * | |
2110 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2111 | * values from/to the user buffer, treated as an ASCII string. | |
2112 | * | |
2113 | * Returns 0 on success. | |
2114 | */ | |
8d65af78 | 2115 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2116 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2117 | { | |
8d65af78 | 2118 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2119 | NULL,NULL); |
2120 | } | |
2121 | ||
34f5a398 | 2122 | /* |
25ddbb18 AK |
2123 | * Taint values can only be increased |
2124 | * This means we can safely use a temporary. | |
34f5a398 | 2125 | */ |
8d65af78 | 2126 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2127 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2128 | { | |
25ddbb18 AK |
2129 | struct ctl_table t; |
2130 | unsigned long tmptaint = get_taint(); | |
2131 | int err; | |
34f5a398 | 2132 | |
91fcd412 | 2133 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2134 | return -EPERM; |
2135 | ||
25ddbb18 AK |
2136 | t = *table; |
2137 | t.data = &tmptaint; | |
8d65af78 | 2138 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2139 | if (err < 0) |
2140 | return err; | |
2141 | ||
2142 | if (write) { | |
2143 | /* | |
2144 | * Poor man's atomic or. Not worth adding a primitive | |
2145 | * to everyone's atomic.h for this | |
2146 | */ | |
2147 | int i; | |
2148 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2149 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2150 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2151 | } |
2152 | } | |
2153 | ||
2154 | return err; | |
34f5a398 TT |
2155 | } |
2156 | ||
bfdc0b49 | 2157 | #ifdef CONFIG_PRINTK |
620f6e8e | 2158 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2159 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2160 | { | |
2161 | if (write && !capable(CAP_SYS_ADMIN)) | |
2162 | return -EPERM; | |
2163 | ||
2164 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2165 | } | |
2166 | #endif | |
2167 | ||
1da177e4 LT |
2168 | struct do_proc_dointvec_minmax_conv_param { |
2169 | int *min; | |
2170 | int *max; | |
2171 | }; | |
2172 | ||
00b7c339 AW |
2173 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2174 | int *valp, | |
1da177e4 LT |
2175 | int write, void *data) |
2176 | { | |
2177 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2178 | if (write) { | |
2179 | int val = *negp ? -*lvalp : *lvalp; | |
2180 | if ((param->min && *param->min > val) || | |
2181 | (param->max && *param->max < val)) | |
2182 | return -EINVAL; | |
2183 | *valp = val; | |
2184 | } else { | |
2185 | int val = *valp; | |
2186 | if (val < 0) { | |
00b7c339 | 2187 | *negp = true; |
1da177e4 LT |
2188 | *lvalp = (unsigned long)-val; |
2189 | } else { | |
00b7c339 | 2190 | *negp = false; |
1da177e4 LT |
2191 | *lvalp = (unsigned long)val; |
2192 | } | |
2193 | } | |
2194 | return 0; | |
2195 | } | |
2196 | ||
2197 | /** | |
2198 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2199 | * @table: the sysctl table | |
2200 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2201 | * @buffer: the user buffer |
2202 | * @lenp: the size of the user buffer | |
2203 | * @ppos: file position | |
2204 | * | |
2205 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2206 | * values from/to the user buffer, treated as an ASCII string. | |
2207 | * | |
2208 | * This routine will ensure the values are within the range specified by | |
2209 | * table->extra1 (min) and table->extra2 (max). | |
2210 | * | |
2211 | * Returns 0 on success. | |
2212 | */ | |
8d65af78 | 2213 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2214 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2215 | { | |
2216 | struct do_proc_dointvec_minmax_conv_param param = { | |
2217 | .min = (int *) table->extra1, | |
2218 | .max = (int *) table->extra2, | |
2219 | }; | |
8d65af78 | 2220 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2221 | do_proc_dointvec_minmax_conv, ¶m); |
2222 | } | |
2223 | ||
54b50199 KC |
2224 | static void validate_coredump_safety(void) |
2225 | { | |
046d662f | 2226 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2227 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 KC |
2228 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
2229 | printk(KERN_WARNING "Unsafe core_pattern used with "\ | |
2230 | "suid_dumpable=2. Pipe handler or fully qualified "\ | |
2231 | "core dump path required.\n"); | |
2232 | } | |
046d662f | 2233 | #endif |
54b50199 KC |
2234 | } |
2235 | ||
2236 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2237 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2238 | { | |
2239 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2240 | if (!error) | |
2241 | validate_coredump_safety(); | |
2242 | return error; | |
2243 | } | |
2244 | ||
046d662f | 2245 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2246 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2247 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2248 | { | |
2249 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2250 | if (!error) | |
2251 | validate_coredump_safety(); | |
2252 | return error; | |
2253 | } | |
046d662f | 2254 | #endif |
54b50199 | 2255 | |
d8217f07 | 2256 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2257 | void __user *buffer, |
2258 | size_t *lenp, loff_t *ppos, | |
2259 | unsigned long convmul, | |
2260 | unsigned long convdiv) | |
2261 | { | |
00b7c339 AW |
2262 | unsigned long *i, *min, *max; |
2263 | int vleft, first = 1, err = 0; | |
2264 | unsigned long page = 0; | |
2265 | size_t left; | |
2266 | char *kbuf; | |
2267 | ||
2268 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2269 | *lenp = 0; |
2270 | return 0; | |
2271 | } | |
00b7c339 | 2272 | |
fcfbd547 | 2273 | i = (unsigned long *) data; |
1da177e4 LT |
2274 | min = (unsigned long *) table->extra1; |
2275 | max = (unsigned long *) table->extra2; | |
2276 | vleft = table->maxlen / sizeof(unsigned long); | |
2277 | left = *lenp; | |
00b7c339 AW |
2278 | |
2279 | if (write) { | |
f4aacea2 KC |
2280 | if (*ppos) { |
2281 | switch (sysctl_writes_strict) { | |
2282 | case SYSCTL_WRITES_STRICT: | |
2283 | goto out; | |
2284 | case SYSCTL_WRITES_WARN: | |
2285 | warn_sysctl_write(table); | |
2286 | break; | |
2287 | default: | |
2288 | break; | |
2289 | } | |
2290 | } | |
2291 | ||
00b7c339 AW |
2292 | if (left > PAGE_SIZE - 1) |
2293 | left = PAGE_SIZE - 1; | |
2294 | page = __get_free_page(GFP_TEMPORARY); | |
2295 | kbuf = (char *) page; | |
2296 | if (!kbuf) | |
2297 | return -ENOMEM; | |
2298 | if (copy_from_user(kbuf, buffer, left)) { | |
2299 | err = -EFAULT; | |
2300 | goto free; | |
2301 | } | |
2302 | kbuf[left] = 0; | |
2303 | } | |
2304 | ||
27b3d80a | 2305 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2306 | unsigned long val; |
2307 | ||
1da177e4 | 2308 | if (write) { |
00b7c339 AW |
2309 | bool neg; |
2310 | ||
2311 | left -= proc_skip_spaces(&kbuf); | |
2312 | ||
2313 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2314 | proc_wspace_sep, | |
2315 | sizeof(proc_wspace_sep), NULL); | |
2316 | if (err) | |
1da177e4 LT |
2317 | break; |
2318 | if (neg) | |
1da177e4 LT |
2319 | continue; |
2320 | if ((min && val < *min) || (max && val > *max)) | |
2321 | continue; | |
2322 | *i = val; | |
2323 | } else { | |
00b7c339 | 2324 | val = convdiv * (*i) / convmul; |
7833819d | 2325 | if (!first) { |
00b7c339 | 2326 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2327 | if (err) |
2328 | break; | |
2329 | } | |
00b7c339 AW |
2330 | err = proc_put_long(&buffer, &left, val, false); |
2331 | if (err) | |
2332 | break; | |
1da177e4 LT |
2333 | } |
2334 | } | |
2335 | ||
00b7c339 AW |
2336 | if (!write && !first && left && !err) |
2337 | err = proc_put_char(&buffer, &left, '\n'); | |
2338 | if (write && !err) | |
2339 | left -= proc_skip_spaces(&kbuf); | |
2340 | free: | |
1da177e4 | 2341 | if (write) { |
00b7c339 AW |
2342 | free_page(page); |
2343 | if (first) | |
2344 | return err ? : -EINVAL; | |
1da177e4 | 2345 | } |
1da177e4 | 2346 | *lenp -= left; |
f4aacea2 | 2347 | out: |
1da177e4 | 2348 | *ppos += *lenp; |
00b7c339 | 2349 | return err; |
1da177e4 LT |
2350 | } |
2351 | ||
d8217f07 | 2352 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2353 | void __user *buffer, |
2354 | size_t *lenp, loff_t *ppos, | |
2355 | unsigned long convmul, | |
2356 | unsigned long convdiv) | |
2357 | { | |
2358 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2359 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2360 | } |
2361 | ||
1da177e4 LT |
2362 | /** |
2363 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2364 | * @table: the sysctl table | |
2365 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2366 | * @buffer: the user buffer |
2367 | * @lenp: the size of the user buffer | |
2368 | * @ppos: file position | |
2369 | * | |
2370 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2371 | * values from/to the user buffer, treated as an ASCII string. | |
2372 | * | |
2373 | * This routine will ensure the values are within the range specified by | |
2374 | * table->extra1 (min) and table->extra2 (max). | |
2375 | * | |
2376 | * Returns 0 on success. | |
2377 | */ | |
8d65af78 | 2378 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2379 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2380 | { | |
8d65af78 | 2381 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2382 | } |
2383 | ||
2384 | /** | |
2385 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2386 | * @table: the sysctl table | |
2387 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2388 | * @buffer: the user buffer |
2389 | * @lenp: the size of the user buffer | |
2390 | * @ppos: file position | |
2391 | * | |
2392 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2393 | * values from/to the user buffer, treated as an ASCII string. The values | |
2394 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2395 | * | |
2396 | * This routine will ensure the values are within the range specified by | |
2397 | * table->extra1 (min) and table->extra2 (max). | |
2398 | * | |
2399 | * Returns 0 on success. | |
2400 | */ | |
d8217f07 | 2401 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2402 | void __user *buffer, |
2403 | size_t *lenp, loff_t *ppos) | |
2404 | { | |
8d65af78 | 2405 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2406 | lenp, ppos, HZ, 1000l); |
2407 | } | |
2408 | ||
2409 | ||
00b7c339 | 2410 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2411 | int *valp, |
2412 | int write, void *data) | |
2413 | { | |
2414 | if (write) { | |
cba9f33d BS |
2415 | if (*lvalp > LONG_MAX / HZ) |
2416 | return 1; | |
1da177e4 LT |
2417 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2418 | } else { | |
2419 | int val = *valp; | |
2420 | unsigned long lval; | |
2421 | if (val < 0) { | |
00b7c339 | 2422 | *negp = true; |
1da177e4 LT |
2423 | lval = (unsigned long)-val; |
2424 | } else { | |
00b7c339 | 2425 | *negp = false; |
1da177e4 LT |
2426 | lval = (unsigned long)val; |
2427 | } | |
2428 | *lvalp = lval / HZ; | |
2429 | } | |
2430 | return 0; | |
2431 | } | |
2432 | ||
00b7c339 | 2433 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2434 | int *valp, |
2435 | int write, void *data) | |
2436 | { | |
2437 | if (write) { | |
cba9f33d BS |
2438 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2439 | return 1; | |
1da177e4 LT |
2440 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2441 | } else { | |
2442 | int val = *valp; | |
2443 | unsigned long lval; | |
2444 | if (val < 0) { | |
00b7c339 | 2445 | *negp = true; |
1da177e4 LT |
2446 | lval = (unsigned long)-val; |
2447 | } else { | |
00b7c339 | 2448 | *negp = false; |
1da177e4 LT |
2449 | lval = (unsigned long)val; |
2450 | } | |
2451 | *lvalp = jiffies_to_clock_t(lval); | |
2452 | } | |
2453 | return 0; | |
2454 | } | |
2455 | ||
00b7c339 | 2456 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2457 | int *valp, |
2458 | int write, void *data) | |
2459 | { | |
2460 | if (write) { | |
d738ce8f FF |
2461 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2462 | ||
2463 | if (jif > INT_MAX) | |
2464 | return 1; | |
2465 | *valp = (int)jif; | |
1da177e4 LT |
2466 | } else { |
2467 | int val = *valp; | |
2468 | unsigned long lval; | |
2469 | if (val < 0) { | |
00b7c339 | 2470 | *negp = true; |
1da177e4 LT |
2471 | lval = (unsigned long)-val; |
2472 | } else { | |
00b7c339 | 2473 | *negp = false; |
1da177e4 LT |
2474 | lval = (unsigned long)val; |
2475 | } | |
2476 | *lvalp = jiffies_to_msecs(lval); | |
2477 | } | |
2478 | return 0; | |
2479 | } | |
2480 | ||
2481 | /** | |
2482 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2483 | * @table: the sysctl table | |
2484 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2485 | * @buffer: the user buffer |
2486 | * @lenp: the size of the user buffer | |
2487 | * @ppos: file position | |
2488 | * | |
2489 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2490 | * values from/to the user buffer, treated as an ASCII string. | |
2491 | * The values read are assumed to be in seconds, and are converted into | |
2492 | * jiffies. | |
2493 | * | |
2494 | * Returns 0 on success. | |
2495 | */ | |
8d65af78 | 2496 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2497 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2498 | { | |
8d65af78 | 2499 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2500 | do_proc_dointvec_jiffies_conv,NULL); |
2501 | } | |
2502 | ||
2503 | /** | |
2504 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2505 | * @table: the sysctl table | |
2506 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2507 | * @buffer: the user buffer |
2508 | * @lenp: the size of the user buffer | |
1e5d5331 | 2509 | * @ppos: pointer to the file position |
1da177e4 LT |
2510 | * |
2511 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2512 | * values from/to the user buffer, treated as an ASCII string. | |
2513 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2514 | * are converted into jiffies. | |
2515 | * | |
2516 | * Returns 0 on success. | |
2517 | */ | |
8d65af78 | 2518 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2519 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2520 | { | |
8d65af78 | 2521 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2522 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2523 | } | |
2524 | ||
2525 | /** | |
2526 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2527 | * @table: the sysctl table | |
2528 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2529 | * @buffer: the user buffer |
2530 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2531 | * @ppos: file position |
2532 | * @ppos: the current position in the file | |
1da177e4 LT |
2533 | * |
2534 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2535 | * values from/to the user buffer, treated as an ASCII string. | |
2536 | * The values read are assumed to be in 1/1000 seconds, and | |
2537 | * are converted into jiffies. | |
2538 | * | |
2539 | * Returns 0 on success. | |
2540 | */ | |
8d65af78 | 2541 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2542 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2543 | { | |
8d65af78 | 2544 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2545 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2546 | } | |
2547 | ||
8d65af78 | 2548 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2549 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2550 | { | |
2551 | struct pid *new_pid; | |
2552 | pid_t tmp; | |
2553 | int r; | |
2554 | ||
6c5f3e7b | 2555 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2556 | |
8d65af78 | 2557 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2558 | lenp, ppos, NULL, NULL); |
2559 | if (r || !write) | |
2560 | return r; | |
2561 | ||
2562 | new_pid = find_get_pid(tmp); | |
2563 | if (!new_pid) | |
2564 | return -ESRCH; | |
2565 | ||
2566 | put_pid(xchg(&cad_pid, new_pid)); | |
2567 | return 0; | |
2568 | } | |
2569 | ||
9f977fb7 OP |
2570 | /** |
2571 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2572 | * @table: the sysctl table | |
2573 | * @write: %TRUE if this is a write to the sysctl file | |
2574 | * @buffer: the user buffer | |
2575 | * @lenp: the size of the user buffer | |
2576 | * @ppos: file position | |
2577 | * | |
2578 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2579 | * in table->maxlen. | |
2580 | * | |
2581 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2582 | * large bitmaps may be represented in a compact manner. Writing into | |
2583 | * the file will clear the bitmap then update it with the given input. | |
2584 | * | |
2585 | * Returns 0 on success. | |
2586 | */ | |
2587 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2588 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2589 | { | |
2590 | int err = 0; | |
2591 | bool first = 1; | |
2592 | size_t left = *lenp; | |
2593 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 2594 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
2595 | unsigned long *tmp_bitmap = NULL; |
2596 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2597 | ||
122ff243 | 2598 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
2599 | *lenp = 0; |
2600 | return 0; | |
2601 | } | |
2602 | ||
2603 | if (write) { | |
2604 | unsigned long page = 0; | |
2605 | char *kbuf; | |
2606 | ||
2607 | if (left > PAGE_SIZE - 1) | |
2608 | left = PAGE_SIZE - 1; | |
2609 | ||
2610 | page = __get_free_page(GFP_TEMPORARY); | |
2611 | kbuf = (char *) page; | |
2612 | if (!kbuf) | |
2613 | return -ENOMEM; | |
2614 | if (copy_from_user(kbuf, buffer, left)) { | |
2615 | free_page(page); | |
2616 | return -EFAULT; | |
2617 | } | |
2618 | kbuf[left] = 0; | |
2619 | ||
2620 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2621 | GFP_KERNEL); | |
2622 | if (!tmp_bitmap) { | |
2623 | free_page(page); | |
2624 | return -ENOMEM; | |
2625 | } | |
2626 | proc_skip_char(&kbuf, &left, '\n'); | |
2627 | while (!err && left) { | |
2628 | unsigned long val_a, val_b; | |
2629 | bool neg; | |
2630 | ||
2631 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2632 | sizeof(tr_a), &c); | |
2633 | if (err) | |
2634 | break; | |
2635 | if (val_a >= bitmap_len || neg) { | |
2636 | err = -EINVAL; | |
2637 | break; | |
2638 | } | |
2639 | ||
2640 | val_b = val_a; | |
2641 | if (left) { | |
2642 | kbuf++; | |
2643 | left--; | |
2644 | } | |
2645 | ||
2646 | if (c == '-') { | |
2647 | err = proc_get_long(&kbuf, &left, &val_b, | |
2648 | &neg, tr_b, sizeof(tr_b), | |
2649 | &c); | |
2650 | if (err) | |
2651 | break; | |
2652 | if (val_b >= bitmap_len || neg || | |
2653 | val_a > val_b) { | |
2654 | err = -EINVAL; | |
2655 | break; | |
2656 | } | |
2657 | if (left) { | |
2658 | kbuf++; | |
2659 | left--; | |
2660 | } | |
2661 | } | |
2662 | ||
5a04cca6 | 2663 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 OP |
2664 | first = 0; |
2665 | proc_skip_char(&kbuf, &left, '\n'); | |
2666 | } | |
2667 | free_page(page); | |
2668 | } else { | |
2669 | unsigned long bit_a, bit_b = 0; | |
2670 | ||
2671 | while (left) { | |
2672 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2673 | if (bit_a >= bitmap_len) | |
2674 | break; | |
2675 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2676 | bit_a + 1) - 1; | |
2677 | ||
2678 | if (!first) { | |
2679 | err = proc_put_char(&buffer, &left, ','); | |
2680 | if (err) | |
2681 | break; | |
2682 | } | |
2683 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2684 | if (err) | |
2685 | break; | |
2686 | if (bit_a != bit_b) { | |
2687 | err = proc_put_char(&buffer, &left, '-'); | |
2688 | if (err) | |
2689 | break; | |
2690 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2691 | if (err) | |
2692 | break; | |
2693 | } | |
2694 | ||
2695 | first = 0; bit_b++; | |
2696 | } | |
2697 | if (!err) | |
2698 | err = proc_put_char(&buffer, &left, '\n'); | |
2699 | } | |
2700 | ||
2701 | if (!err) { | |
2702 | if (write) { | |
2703 | if (*ppos) | |
2704 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2705 | else | |
5a04cca6 | 2706 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2707 | } |
2708 | kfree(tmp_bitmap); | |
2709 | *lenp -= left; | |
2710 | *ppos += *lenp; | |
2711 | return 0; | |
2712 | } else { | |
2713 | kfree(tmp_bitmap); | |
2714 | return err; | |
2715 | } | |
2716 | } | |
2717 | ||
55610500 | 2718 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2719 | |
8d65af78 | 2720 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2721 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2722 | { | |
2723 | return -ENOSYS; | |
2724 | } | |
2725 | ||
8d65af78 | 2726 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2727 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2728 | { |
2729 | return -ENOSYS; | |
2730 | } | |
2731 | ||
8d65af78 | 2732 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2733 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2734 | { | |
2735 | return -ENOSYS; | |
2736 | } | |
2737 | ||
8d65af78 | 2738 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2739 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2740 | { | |
2741 | return -ENOSYS; | |
2742 | } | |
2743 | ||
8d65af78 | 2744 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2745 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2746 | { | |
2747 | return -ENOSYS; | |
2748 | } | |
2749 | ||
8d65af78 | 2750 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2751 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2752 | { | |
2753 | return -ENOSYS; | |
2754 | } | |
2755 | ||
8d65af78 | 2756 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2757 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2758 | { | |
2759 | return -ENOSYS; | |
2760 | } | |
2761 | ||
d8217f07 | 2762 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2763 | void __user *buffer, |
2764 | size_t *lenp, loff_t *ppos) | |
2765 | { | |
2766 | return -ENOSYS; | |
2767 | } | |
2768 | ||
2769 | ||
55610500 | 2770 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2771 | |
1da177e4 LT |
2772 | /* |
2773 | * No sense putting this after each symbol definition, twice, | |
2774 | * exception granted :-) | |
2775 | */ | |
2776 | EXPORT_SYMBOL(proc_dointvec); | |
2777 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2778 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2779 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2780 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2781 | EXPORT_SYMBOL(proc_dostring); | |
2782 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2783 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |