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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 | 21 | #include <linux/module.h> |
e2e40f2c | 22 | #include <linux/aio.h> |
1da177e4 LT |
23 | #include <linux/mm.h> |
24 | #include <linux/swap.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/sysctl.h> | |
5a04cca6 | 27 | #include <linux/bitmap.h> |
d33ed52d | 28 | #include <linux/signal.h> |
455cd5ab | 29 | #include <linux/printk.h> |
1da177e4 | 30 | #include <linux/proc_fs.h> |
72c2d582 | 31 | #include <linux/security.h> |
1da177e4 | 32 | #include <linux/ctype.h> |
dfec072e | 33 | #include <linux/kmemcheck.h> |
fd4b616b | 34 | #include <linux/kmemleak.h> |
62239ac2 | 35 | #include <linux/fs.h> |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <linux/kernel.h> | |
0296b228 | 38 | #include <linux/kobject.h> |
20380731 | 39 | #include <linux/net.h> |
1da177e4 LT |
40 | #include <linux/sysrq.h> |
41 | #include <linux/highuid.h> | |
42 | #include <linux/writeback.h> | |
3fff4c42 | 43 | #include <linux/ratelimit.h> |
76ab0f53 | 44 | #include <linux/compaction.h> |
1da177e4 | 45 | #include <linux/hugetlb.h> |
1da177e4 | 46 | #include <linux/initrd.h> |
0b77f5bf | 47 | #include <linux/key.h> |
1da177e4 LT |
48 | #include <linux/times.h> |
49 | #include <linux/limits.h> | |
50 | #include <linux/dcache.h> | |
6e006701 | 51 | #include <linux/dnotify.h> |
1da177e4 | 52 | #include <linux/syscalls.h> |
c748e134 | 53 | #include <linux/vmstat.h> |
c255d844 PM |
54 | #include <linux/nfs_fs.h> |
55 | #include <linux/acpi.h> | |
10a0a8d4 | 56 | #include <linux/reboot.h> |
b0fc494f | 57 | #include <linux/ftrace.h> |
cdd6c482 | 58 | #include <linux/perf_event.h> |
b2be84df | 59 | #include <linux/kprobes.h> |
b492e95b | 60 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 61 | #include <linux/oom.h> |
17f60a7d | 62 | #include <linux/kmod.h> |
73efc039 | 63 | #include <linux/capability.h> |
40401530 | 64 | #include <linux/binfmts.h> |
cf4aebc2 | 65 | #include <linux/sched/sysctl.h> |
7984754b | 66 | #include <linux/kexec.h> |
1be7f75d | 67 | #include <linux/bpf.h> |
1da177e4 LT |
68 | |
69 | #include <asm/uaccess.h> | |
70 | #include <asm/processor.h> | |
71 | ||
29cbc78b AK |
72 | #ifdef CONFIG_X86 |
73 | #include <asm/nmi.h> | |
0741f4d2 | 74 | #include <asm/stacktrace.h> |
6e7c4025 | 75 | #include <asm/io.h> |
29cbc78b | 76 | #endif |
d550bbd4 DH |
77 | #ifdef CONFIG_SPARC |
78 | #include <asm/setup.h> | |
79 | #endif | |
c55b7c3e DY |
80 | #ifdef CONFIG_BSD_PROCESS_ACCT |
81 | #include <linux/acct.h> | |
82 | #endif | |
4f0e056f DY |
83 | #ifdef CONFIG_RT_MUTEXES |
84 | #include <linux/rtmutex.h> | |
85 | #endif | |
2edf5e49 DY |
86 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
87 | #include <linux/lockdep.h> | |
88 | #endif | |
15485a46 DY |
89 | #ifdef CONFIG_CHR_DEV_SG |
90 | #include <scsi/sg.h> | |
91 | #endif | |
29cbc78b | 92 | |
58687acb | 93 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
94 | #include <linux/nmi.h> |
95 | #endif | |
96 | ||
1da177e4 LT |
97 | #if defined(CONFIG_SYSCTL) |
98 | ||
99 | /* External variables not in a header file. */ | |
d6e71144 | 100 | extern int suid_dumpable; |
046d662f AK |
101 | #ifdef CONFIG_COREDUMP |
102 | extern int core_uses_pid; | |
1da177e4 | 103 | extern char core_pattern[]; |
a293980c | 104 | extern unsigned int core_pipe_limit; |
046d662f | 105 | #endif |
1da177e4 | 106 | extern int pid_max; |
1da177e4 | 107 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 108 | extern int percpu_pagelist_fraction; |
bebfa101 | 109 | extern int compat_log; |
9745512c | 110 | extern int latencytop_enabled; |
eceea0b3 | 111 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
112 | #ifndef CONFIG_MMU |
113 | extern int sysctl_nr_trim_pages; | |
114 | #endif | |
1da177e4 | 115 | |
c4f3b63f | 116 | /* Constants used for minimum and maximum */ |
2508ce18 | 117 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
118 | static int sixty = 60; |
119 | #endif | |
120 | ||
270750db AT |
121 | static int __maybe_unused neg_one = -1; |
122 | ||
c4f3b63f | 123 | static int zero; |
cd5f9a4c LT |
124 | static int __maybe_unused one = 1; |
125 | static int __maybe_unused two = 2; | |
5509a5d2 | 126 | static int __maybe_unused four = 4; |
fc3501d4 | 127 | static unsigned long one_ul = 1; |
c4f3b63f | 128 | static int one_hundred = 100; |
795ae7a0 | 129 | static int one_thousand = 1000; |
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 | ||
41662f5c | 177 | static int sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 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 | }, | |
cb251765 MG |
354 | #ifdef CONFIG_SCHEDSTATS |
355 | { | |
356 | .procname = "sched_schedstats", | |
357 | .data = NULL, | |
358 | .maxlen = sizeof(unsigned int), | |
359 | .mode = 0644, | |
360 | .proc_handler = sysctl_schedstats, | |
361 | .extra1 = &zero, | |
362 | .extra2 = &one, | |
363 | }, | |
364 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
365 | #endif /* CONFIG_SMP */ |
366 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
367 | { |
368 | .procname = "numa_balancing_scan_delay_ms", | |
369 | .data = &sysctl_numa_balancing_scan_delay, | |
370 | .maxlen = sizeof(unsigned int), | |
371 | .mode = 0644, | |
372 | .proc_handler = proc_dointvec, | |
373 | }, | |
cbee9f88 PZ |
374 | { |
375 | .procname = "numa_balancing_scan_period_min_ms", | |
376 | .data = &sysctl_numa_balancing_scan_period_min, | |
377 | .maxlen = sizeof(unsigned int), | |
378 | .mode = 0644, | |
379 | .proc_handler = proc_dointvec, | |
380 | }, | |
381 | { | |
382 | .procname = "numa_balancing_scan_period_max_ms", | |
383 | .data = &sysctl_numa_balancing_scan_period_max, | |
384 | .maxlen = sizeof(unsigned int), | |
385 | .mode = 0644, | |
386 | .proc_handler = proc_dointvec, | |
387 | }, | |
6e5fb223 PZ |
388 | { |
389 | .procname = "numa_balancing_scan_size_mb", | |
390 | .data = &sysctl_numa_balancing_scan_size, | |
391 | .maxlen = sizeof(unsigned int), | |
392 | .mode = 0644, | |
64192658 KT |
393 | .proc_handler = proc_dointvec_minmax, |
394 | .extra1 = &one, | |
6e5fb223 | 395 | }, |
54a43d54 AK |
396 | { |
397 | .procname = "numa_balancing", | |
398 | .data = NULL, /* filled in by handler */ | |
399 | .maxlen = sizeof(unsigned int), | |
400 | .mode = 0644, | |
401 | .proc_handler = sysctl_numa_balancing, | |
402 | .extra1 = &zero, | |
403 | .extra2 = &one, | |
404 | }, | |
cbee9f88 PZ |
405 | #endif /* CONFIG_NUMA_BALANCING */ |
406 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 407 | { |
9f0c1e56 PZ |
408 | .procname = "sched_rt_period_us", |
409 | .data = &sysctl_sched_rt_period, | |
410 | .maxlen = sizeof(unsigned int), | |
411 | .mode = 0644, | |
6d456111 | 412 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
413 | }, |
414 | { | |
9f0c1e56 PZ |
415 | .procname = "sched_rt_runtime_us", |
416 | .data = &sysctl_sched_rt_runtime, | |
417 | .maxlen = sizeof(int), | |
418 | .mode = 0644, | |
6d456111 | 419 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 420 | }, |
ce0dbbbb CW |
421 | { |
422 | .procname = "sched_rr_timeslice_ms", | |
423 | .data = &sched_rr_timeslice, | |
424 | .maxlen = sizeof(int), | |
425 | .mode = 0644, | |
426 | .proc_handler = sched_rr_handler, | |
427 | }, | |
5091faa4 MG |
428 | #ifdef CONFIG_SCHED_AUTOGROUP |
429 | { | |
430 | .procname = "sched_autogroup_enabled", | |
431 | .data = &sysctl_sched_autogroup_enabled, | |
432 | .maxlen = sizeof(unsigned int), | |
433 | .mode = 0644, | |
1747b21f | 434 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
435 | .extra1 = &zero, |
436 | .extra2 = &one, | |
437 | }, | |
438 | #endif | |
ec12cb7f PT |
439 | #ifdef CONFIG_CFS_BANDWIDTH |
440 | { | |
441 | .procname = "sched_cfs_bandwidth_slice_us", | |
442 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
443 | .maxlen = sizeof(unsigned int), | |
444 | .mode = 0644, | |
445 | .proc_handler = proc_dointvec_minmax, | |
446 | .extra1 = &one, | |
447 | }, | |
448 | #endif | |
f20786ff PZ |
449 | #ifdef CONFIG_PROVE_LOCKING |
450 | { | |
f20786ff PZ |
451 | .procname = "prove_locking", |
452 | .data = &prove_locking, | |
453 | .maxlen = sizeof(int), | |
454 | .mode = 0644, | |
6d456111 | 455 | .proc_handler = proc_dointvec, |
f20786ff PZ |
456 | }, |
457 | #endif | |
458 | #ifdef CONFIG_LOCK_STAT | |
459 | { | |
f20786ff PZ |
460 | .procname = "lock_stat", |
461 | .data = &lock_stat, | |
462 | .maxlen = sizeof(int), | |
463 | .mode = 0644, | |
6d456111 | 464 | .proc_handler = proc_dointvec, |
f20786ff | 465 | }, |
77e54a1f | 466 | #endif |
1da177e4 | 467 | { |
1da177e4 LT |
468 | .procname = "panic", |
469 | .data = &panic_timeout, | |
470 | .maxlen = sizeof(int), | |
471 | .mode = 0644, | |
6d456111 | 472 | .proc_handler = proc_dointvec, |
1da177e4 | 473 | }, |
046d662f | 474 | #ifdef CONFIG_COREDUMP |
1da177e4 | 475 | { |
1da177e4 LT |
476 | .procname = "core_uses_pid", |
477 | .data = &core_uses_pid, | |
478 | .maxlen = sizeof(int), | |
479 | .mode = 0644, | |
6d456111 | 480 | .proc_handler = proc_dointvec, |
1da177e4 LT |
481 | }, |
482 | { | |
1da177e4 LT |
483 | .procname = "core_pattern", |
484 | .data = core_pattern, | |
71ce92f3 | 485 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 486 | .mode = 0644, |
54b50199 | 487 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 488 | }, |
a293980c | 489 | { |
a293980c NH |
490 | .procname = "core_pipe_limit", |
491 | .data = &core_pipe_limit, | |
492 | .maxlen = sizeof(unsigned int), | |
493 | .mode = 0644, | |
6d456111 | 494 | .proc_handler = proc_dointvec, |
a293980c | 495 | }, |
046d662f | 496 | #endif |
34f5a398 | 497 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 498 | { |
1da177e4 | 499 | .procname = "tainted", |
25ddbb18 | 500 | .maxlen = sizeof(long), |
34f5a398 | 501 | .mode = 0644, |
6d456111 | 502 | .proc_handler = proc_taint, |
1da177e4 | 503 | }, |
f4aacea2 KC |
504 | { |
505 | .procname = "sysctl_writes_strict", | |
506 | .data = &sysctl_writes_strict, | |
507 | .maxlen = sizeof(int), | |
508 | .mode = 0644, | |
509 | .proc_handler = proc_dointvec_minmax, | |
510 | .extra1 = &neg_one, | |
511 | .extra2 = &one, | |
512 | }, | |
34f5a398 | 513 | #endif |
9745512c AV |
514 | #ifdef CONFIG_LATENCYTOP |
515 | { | |
516 | .procname = "latencytop", | |
517 | .data = &latencytop_enabled, | |
518 | .maxlen = sizeof(int), | |
519 | .mode = 0644, | |
cb251765 | 520 | .proc_handler = sysctl_latencytop, |
9745512c AV |
521 | }, |
522 | #endif | |
1da177e4 LT |
523 | #ifdef CONFIG_BLK_DEV_INITRD |
524 | { | |
1da177e4 LT |
525 | .procname = "real-root-dev", |
526 | .data = &real_root_dev, | |
527 | .maxlen = sizeof(int), | |
528 | .mode = 0644, | |
6d456111 | 529 | .proc_handler = proc_dointvec, |
1da177e4 LT |
530 | }, |
531 | #endif | |
45807a1d | 532 | { |
45807a1d IM |
533 | .procname = "print-fatal-signals", |
534 | .data = &print_fatal_signals, | |
535 | .maxlen = sizeof(int), | |
536 | .mode = 0644, | |
6d456111 | 537 | .proc_handler = proc_dointvec, |
45807a1d | 538 | }, |
72c57ed5 | 539 | #ifdef CONFIG_SPARC |
1da177e4 | 540 | { |
1da177e4 LT |
541 | .procname = "reboot-cmd", |
542 | .data = reboot_command, | |
543 | .maxlen = 256, | |
544 | .mode = 0644, | |
6d456111 | 545 | .proc_handler = proc_dostring, |
1da177e4 LT |
546 | }, |
547 | { | |
1da177e4 LT |
548 | .procname = "stop-a", |
549 | .data = &stop_a_enabled, | |
550 | .maxlen = sizeof (int), | |
551 | .mode = 0644, | |
6d456111 | 552 | .proc_handler = proc_dointvec, |
1da177e4 LT |
553 | }, |
554 | { | |
1da177e4 LT |
555 | .procname = "scons-poweroff", |
556 | .data = &scons_pwroff, | |
557 | .maxlen = sizeof (int), | |
558 | .mode = 0644, | |
6d456111 | 559 | .proc_handler = proc_dointvec, |
1da177e4 LT |
560 | }, |
561 | #endif | |
0871420f DM |
562 | #ifdef CONFIG_SPARC64 |
563 | { | |
0871420f DM |
564 | .procname = "tsb-ratio", |
565 | .data = &sysctl_tsb_ratio, | |
566 | .maxlen = sizeof (int), | |
567 | .mode = 0644, | |
6d456111 | 568 | .proc_handler = proc_dointvec, |
0871420f DM |
569 | }, |
570 | #endif | |
1da177e4 LT |
571 | #ifdef __hppa__ |
572 | { | |
1da177e4 LT |
573 | .procname = "soft-power", |
574 | .data = &pwrsw_enabled, | |
575 | .maxlen = sizeof (int), | |
576 | .mode = 0644, | |
6d456111 | 577 | .proc_handler = proc_dointvec, |
1da177e4 | 578 | }, |
bf14e3b9 VG |
579 | #endif |
580 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 581 | { |
1da177e4 LT |
582 | .procname = "unaligned-trap", |
583 | .data = &unaligned_enabled, | |
584 | .maxlen = sizeof (int), | |
585 | .mode = 0644, | |
6d456111 | 586 | .proc_handler = proc_dointvec, |
1da177e4 LT |
587 | }, |
588 | #endif | |
589 | { | |
1da177e4 LT |
590 | .procname = "ctrl-alt-del", |
591 | .data = &C_A_D, | |
592 | .maxlen = sizeof(int), | |
593 | .mode = 0644, | |
6d456111 | 594 | .proc_handler = proc_dointvec, |
1da177e4 | 595 | }, |
606576ce | 596 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 597 | { |
b0fc494f SR |
598 | .procname = "ftrace_enabled", |
599 | .data = &ftrace_enabled, | |
600 | .maxlen = sizeof(int), | |
601 | .mode = 0644, | |
6d456111 | 602 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
603 | }, |
604 | #endif | |
f38f1d2a SR |
605 | #ifdef CONFIG_STACK_TRACER |
606 | { | |
f38f1d2a SR |
607 | .procname = "stack_tracer_enabled", |
608 | .data = &stack_tracer_enabled, | |
609 | .maxlen = sizeof(int), | |
610 | .mode = 0644, | |
6d456111 | 611 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
612 | }, |
613 | #endif | |
944ac425 SR |
614 | #ifdef CONFIG_TRACING |
615 | { | |
3299b4dd | 616 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
617 | .data = &ftrace_dump_on_oops, |
618 | .maxlen = sizeof(int), | |
619 | .mode = 0644, | |
6d456111 | 620 | .proc_handler = proc_dointvec, |
944ac425 | 621 | }, |
de7edd31 SRRH |
622 | { |
623 | .procname = "traceoff_on_warning", | |
624 | .data = &__disable_trace_on_warning, | |
625 | .maxlen = sizeof(__disable_trace_on_warning), | |
626 | .mode = 0644, | |
627 | .proc_handler = proc_dointvec, | |
628 | }, | |
0daa2302 SRRH |
629 | { |
630 | .procname = "tracepoint_printk", | |
631 | .data = &tracepoint_printk, | |
632 | .maxlen = sizeof(tracepoint_printk), | |
633 | .mode = 0644, | |
634 | .proc_handler = proc_dointvec, | |
635 | }, | |
944ac425 | 636 | #endif |
2965faa5 | 637 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
638 | { |
639 | .procname = "kexec_load_disabled", | |
640 | .data = &kexec_load_disabled, | |
641 | .maxlen = sizeof(int), | |
642 | .mode = 0644, | |
643 | /* only handle a transition from default "0" to "1" */ | |
644 | .proc_handler = proc_dointvec_minmax, | |
645 | .extra1 = &one, | |
646 | .extra2 = &one, | |
647 | }, | |
648 | #endif | |
a1ef5adb | 649 | #ifdef CONFIG_MODULES |
1da177e4 | 650 | { |
1da177e4 LT |
651 | .procname = "modprobe", |
652 | .data = &modprobe_path, | |
653 | .maxlen = KMOD_PATH_LEN, | |
654 | .mode = 0644, | |
6d456111 | 655 | .proc_handler = proc_dostring, |
1da177e4 | 656 | }, |
3d43321b | 657 | { |
3d43321b KC |
658 | .procname = "modules_disabled", |
659 | .data = &modules_disabled, | |
660 | .maxlen = sizeof(int), | |
661 | .mode = 0644, | |
662 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 663 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
664 | .extra1 = &one, |
665 | .extra2 = &one, | |
666 | }, | |
1da177e4 | 667 | #endif |
86d56134 | 668 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 669 | { |
1da177e4 | 670 | .procname = "hotplug", |
312c004d KS |
671 | .data = &uevent_helper, |
672 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 673 | .mode = 0644, |
6d456111 | 674 | .proc_handler = proc_dostring, |
1da177e4 | 675 | }, |
86d56134 | 676 | #endif |
1da177e4 LT |
677 | #ifdef CONFIG_CHR_DEV_SG |
678 | { | |
1da177e4 LT |
679 | .procname = "sg-big-buff", |
680 | .data = &sg_big_buff, | |
681 | .maxlen = sizeof (int), | |
682 | .mode = 0444, | |
6d456111 | 683 | .proc_handler = proc_dointvec, |
1da177e4 LT |
684 | }, |
685 | #endif | |
686 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
687 | { | |
1da177e4 LT |
688 | .procname = "acct", |
689 | .data = &acct_parm, | |
690 | .maxlen = 3*sizeof(int), | |
691 | .mode = 0644, | |
6d456111 | 692 | .proc_handler = proc_dointvec, |
1da177e4 LT |
693 | }, |
694 | #endif | |
1da177e4 LT |
695 | #ifdef CONFIG_MAGIC_SYSRQ |
696 | { | |
1da177e4 | 697 | .procname = "sysrq", |
5d6f647f | 698 | .data = &__sysrq_enabled, |
1da177e4 LT |
699 | .maxlen = sizeof (int), |
700 | .mode = 0644, | |
97f5f0cd | 701 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
702 | }, |
703 | #endif | |
d6f8ff73 | 704 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 705 | { |
1da177e4 | 706 | .procname = "cad_pid", |
9ec52099 | 707 | .data = NULL, |
1da177e4 LT |
708 | .maxlen = sizeof (int), |
709 | .mode = 0600, | |
6d456111 | 710 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 711 | }, |
d6f8ff73 | 712 | #endif |
1da177e4 | 713 | { |
1da177e4 | 714 | .procname = "threads-max", |
16db3d3f | 715 | .data = NULL, |
1da177e4 LT |
716 | .maxlen = sizeof(int), |
717 | .mode = 0644, | |
16db3d3f | 718 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
719 | }, |
720 | { | |
1da177e4 LT |
721 | .procname = "random", |
722 | .mode = 0555, | |
723 | .child = random_table, | |
724 | }, | |
17f60a7d EP |
725 | { |
726 | .procname = "usermodehelper", | |
727 | .mode = 0555, | |
728 | .child = usermodehelper_table, | |
729 | }, | |
1da177e4 | 730 | { |
1da177e4 LT |
731 | .procname = "overflowuid", |
732 | .data = &overflowuid, | |
733 | .maxlen = sizeof(int), | |
734 | .mode = 0644, | |
6d456111 | 735 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
736 | .extra1 = &minolduid, |
737 | .extra2 = &maxolduid, | |
738 | }, | |
739 | { | |
1da177e4 LT |
740 | .procname = "overflowgid", |
741 | .data = &overflowgid, | |
742 | .maxlen = sizeof(int), | |
743 | .mode = 0644, | |
6d456111 | 744 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
745 | .extra1 = &minolduid, |
746 | .extra2 = &maxolduid, | |
747 | }, | |
347a8dc3 | 748 | #ifdef CONFIG_S390 |
1da177e4 LT |
749 | #ifdef CONFIG_MATHEMU |
750 | { | |
1da177e4 LT |
751 | .procname = "ieee_emulation_warnings", |
752 | .data = &sysctl_ieee_emulation_warnings, | |
753 | .maxlen = sizeof(int), | |
754 | .mode = 0644, | |
6d456111 | 755 | .proc_handler = proc_dointvec, |
1da177e4 | 756 | }, |
1da177e4 LT |
757 | #endif |
758 | { | |
1da177e4 | 759 | .procname = "userprocess_debug", |
ab3c68ee | 760 | .data = &show_unhandled_signals, |
1da177e4 LT |
761 | .maxlen = sizeof(int), |
762 | .mode = 0644, | |
6d456111 | 763 | .proc_handler = proc_dointvec, |
1da177e4 LT |
764 | }, |
765 | #endif | |
766 | { | |
1da177e4 LT |
767 | .procname = "pid_max", |
768 | .data = &pid_max, | |
769 | .maxlen = sizeof (int), | |
770 | .mode = 0644, | |
6d456111 | 771 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
772 | .extra1 = &pid_max_min, |
773 | .extra2 = &pid_max_max, | |
774 | }, | |
775 | { | |
1da177e4 LT |
776 | .procname = "panic_on_oops", |
777 | .data = &panic_on_oops, | |
778 | .maxlen = sizeof(int), | |
779 | .mode = 0644, | |
6d456111 | 780 | .proc_handler = proc_dointvec, |
1da177e4 | 781 | }, |
7ef3d2fd JP |
782 | #if defined CONFIG_PRINTK |
783 | { | |
7ef3d2fd JP |
784 | .procname = "printk", |
785 | .data = &console_loglevel, | |
786 | .maxlen = 4*sizeof(int), | |
787 | .mode = 0644, | |
6d456111 | 788 | .proc_handler = proc_dointvec, |
7ef3d2fd | 789 | }, |
1da177e4 | 790 | { |
1da177e4 | 791 | .procname = "printk_ratelimit", |
717115e1 | 792 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
793 | .maxlen = sizeof(int), |
794 | .mode = 0644, | |
6d456111 | 795 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
796 | }, |
797 | { | |
1da177e4 | 798 | .procname = "printk_ratelimit_burst", |
717115e1 | 799 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
800 | .maxlen = sizeof(int), |
801 | .mode = 0644, | |
6d456111 | 802 | .proc_handler = proc_dointvec, |
1da177e4 | 803 | }, |
af91322e | 804 | { |
af91322e DY |
805 | .procname = "printk_delay", |
806 | .data = &printk_delay_msec, | |
807 | .maxlen = sizeof(int), | |
808 | .mode = 0644, | |
6d456111 | 809 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
810 | .extra1 = &zero, |
811 | .extra2 = &ten_thousand, | |
812 | }, | |
eaf06b24 DR |
813 | { |
814 | .procname = "dmesg_restrict", | |
815 | .data = &dmesg_restrict, | |
816 | .maxlen = sizeof(int), | |
817 | .mode = 0644, | |
620f6e8e | 818 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
819 | .extra1 = &zero, |
820 | .extra2 = &one, | |
821 | }, | |
455cd5ab DR |
822 | { |
823 | .procname = "kptr_restrict", | |
824 | .data = &kptr_restrict, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
620f6e8e | 827 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
828 | .extra1 = &zero, |
829 | .extra2 = &two, | |
830 | }, | |
df6e61d4 | 831 | #endif |
1da177e4 | 832 | { |
1da177e4 LT |
833 | .procname = "ngroups_max", |
834 | .data = &ngroups_max, | |
835 | .maxlen = sizeof (int), | |
836 | .mode = 0444, | |
6d456111 | 837 | .proc_handler = proc_dointvec, |
1da177e4 | 838 | }, |
73efc039 DB |
839 | { |
840 | .procname = "cap_last_cap", | |
841 | .data = (void *)&cap_last_cap, | |
842 | .maxlen = sizeof(int), | |
843 | .mode = 0444, | |
844 | .proc_handler = proc_dointvec, | |
845 | }, | |
58687acb | 846 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 847 | { |
58687acb | 848 | .procname = "watchdog", |
3c00ea82 | 849 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
850 | .maxlen = sizeof (int), |
851 | .mode = 0644, | |
195daf66 | 852 | .proc_handler = proc_watchdog, |
586692a5 MSB |
853 | .extra1 = &zero, |
854 | .extra2 = &one, | |
58687acb DZ |
855 | }, |
856 | { | |
857 | .procname = "watchdog_thresh", | |
586692a5 | 858 | .data = &watchdog_thresh, |
58687acb DZ |
859 | .maxlen = sizeof(int), |
860 | .mode = 0644, | |
195daf66 | 861 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 862 | .extra1 = &zero, |
58687acb | 863 | .extra2 = &sixty, |
504d7cf1 | 864 | }, |
195daf66 UO |
865 | { |
866 | .procname = "nmi_watchdog", | |
867 | .data = &nmi_watchdog_enabled, | |
868 | .maxlen = sizeof (int), | |
869 | .mode = 0644, | |
870 | .proc_handler = proc_nmi_watchdog, | |
871 | .extra1 = &zero, | |
872 | #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) | |
873 | .extra2 = &one, | |
874 | #else | |
875 | .extra2 = &zero, | |
876 | #endif | |
877 | }, | |
878 | { | |
879 | .procname = "soft_watchdog", | |
880 | .data = &soft_watchdog_enabled, | |
881 | .maxlen = sizeof (int), | |
882 | .mode = 0644, | |
883 | .proc_handler = proc_soft_watchdog, | |
884 | .extra1 = &zero, | |
885 | .extra2 = &one, | |
886 | }, | |
fe4ba3c3 CM |
887 | { |
888 | .procname = "watchdog_cpumask", | |
889 | .data = &watchdog_cpumask_bits, | |
890 | .maxlen = NR_CPUS, | |
891 | .mode = 0644, | |
892 | .proc_handler = proc_watchdog_cpumask, | |
893 | }, | |
2508ce18 DZ |
894 | { |
895 | .procname = "softlockup_panic", | |
896 | .data = &softlockup_panic, | |
897 | .maxlen = sizeof(int), | |
898 | .mode = 0644, | |
899 | .proc_handler = proc_dointvec_minmax, | |
900 | .extra1 = &zero, | |
901 | .extra2 = &one, | |
902 | }, | |
ac1f5912 DZ |
903 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
904 | { | |
905 | .procname = "hardlockup_panic", | |
906 | .data = &hardlockup_panic, | |
907 | .maxlen = sizeof(int), | |
908 | .mode = 0644, | |
909 | .proc_handler = proc_dointvec_minmax, | |
910 | .extra1 = &zero, | |
911 | .extra2 = &one, | |
912 | }, | |
913 | #endif | |
ed235875 AT |
914 | #ifdef CONFIG_SMP |
915 | { | |
916 | .procname = "softlockup_all_cpu_backtrace", | |
917 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
918 | .maxlen = sizeof(int), | |
919 | .mode = 0644, | |
920 | .proc_handler = proc_dointvec_minmax, | |
921 | .extra1 = &zero, | |
922 | .extra2 = &one, | |
923 | }, | |
55537871 JK |
924 | { |
925 | .procname = "hardlockup_all_cpu_backtrace", | |
926 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
927 | .maxlen = sizeof(int), | |
928 | .mode = 0644, | |
929 | .proc_handler = proc_dointvec_minmax, | |
930 | .extra1 = &zero, | |
931 | .extra2 = &one, | |
932 | }, | |
ed235875 | 933 | #endif /* CONFIG_SMP */ |
5dc30558 DZ |
934 | #endif |
935 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
936 | { | |
937 | .procname = "unknown_nmi_panic", | |
938 | .data = &unknown_nmi_panic, | |
939 | .maxlen = sizeof (int), | |
940 | .mode = 0644, | |
941 | .proc_handler = proc_dointvec, | |
942 | }, | |
504d7cf1 | 943 | #endif |
1da177e4 | 944 | #if defined(CONFIG_X86) |
8da5adda | 945 | { |
8da5adda DZ |
946 | .procname = "panic_on_unrecovered_nmi", |
947 | .data = &panic_on_unrecovered_nmi, | |
948 | .maxlen = sizeof(int), | |
949 | .mode = 0644, | |
6d456111 | 950 | .proc_handler = proc_dointvec, |
8da5adda | 951 | }, |
5211a242 | 952 | { |
5211a242 KG |
953 | .procname = "panic_on_io_nmi", |
954 | .data = &panic_on_io_nmi, | |
955 | .maxlen = sizeof(int), | |
956 | .mode = 0644, | |
6d456111 | 957 | .proc_handler = proc_dointvec, |
5211a242 | 958 | }, |
55af7796 MH |
959 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
960 | { | |
961 | .procname = "panic_on_stackoverflow", | |
962 | .data = &sysctl_panic_on_stackoverflow, | |
963 | .maxlen = sizeof(int), | |
964 | .mode = 0644, | |
965 | .proc_handler = proc_dointvec, | |
966 | }, | |
967 | #endif | |
1da177e4 | 968 | { |
1da177e4 LT |
969 | .procname = "bootloader_type", |
970 | .data = &bootloader_type, | |
971 | .maxlen = sizeof (int), | |
972 | .mode = 0444, | |
6d456111 | 973 | .proc_handler = proc_dointvec, |
1da177e4 | 974 | }, |
5031296c | 975 | { |
5031296c PA |
976 | .procname = "bootloader_version", |
977 | .data = &bootloader_version, | |
978 | .maxlen = sizeof (int), | |
979 | .mode = 0444, | |
6d456111 | 980 | .proc_handler = proc_dointvec, |
5031296c | 981 | }, |
0741f4d2 | 982 | { |
0741f4d2 CE |
983 | .procname = "kstack_depth_to_print", |
984 | .data = &kstack_depth_to_print, | |
985 | .maxlen = sizeof(int), | |
986 | .mode = 0644, | |
6d456111 | 987 | .proc_handler = proc_dointvec, |
0741f4d2 | 988 | }, |
6e7c4025 | 989 | { |
6e7c4025 IM |
990 | .procname = "io_delay_type", |
991 | .data = &io_delay_type, | |
992 | .maxlen = sizeof(int), | |
993 | .mode = 0644, | |
6d456111 | 994 | .proc_handler = proc_dointvec, |
6e7c4025 | 995 | }, |
1da177e4 | 996 | #endif |
7a9166e3 | 997 | #if defined(CONFIG_MMU) |
1da177e4 | 998 | { |
1da177e4 LT |
999 | .procname = "randomize_va_space", |
1000 | .data = &randomize_va_space, | |
1001 | .maxlen = sizeof(int), | |
1002 | .mode = 0644, | |
6d456111 | 1003 | .proc_handler = proc_dointvec, |
1da177e4 | 1004 | }, |
7a9166e3 | 1005 | #endif |
0152fb37 | 1006 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1007 | { |
951f22d5 MS |
1008 | .procname = "spin_retry", |
1009 | .data = &spin_retry, | |
1010 | .maxlen = sizeof (int), | |
1011 | .mode = 0644, | |
6d456111 | 1012 | .proc_handler = proc_dointvec, |
951f22d5 | 1013 | }, |
c255d844 | 1014 | #endif |
673d5b43 | 1015 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1016 | { |
c255d844 | 1017 | .procname = "acpi_video_flags", |
77afcf78 | 1018 | .data = &acpi_realmode_flags, |
c255d844 PM |
1019 | .maxlen = sizeof (unsigned long), |
1020 | .mode = 0644, | |
6d456111 | 1021 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1022 | }, |
d2b176ed | 1023 | #endif |
b6fca725 | 1024 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1025 | { |
d2b176ed JS |
1026 | .procname = "ignore-unaligned-usertrap", |
1027 | .data = &no_unaligned_warning, | |
1028 | .maxlen = sizeof (int), | |
1029 | .mode = 0644, | |
6d456111 | 1030 | .proc_handler = proc_dointvec, |
d2b176ed | 1031 | }, |
b6fca725 VG |
1032 | #endif |
1033 | #ifdef CONFIG_IA64 | |
88fc241f | 1034 | { |
88fc241f DC |
1035 | .procname = "unaligned-dump-stack", |
1036 | .data = &unaligned_dump_stack, | |
1037 | .maxlen = sizeof (int), | |
1038 | .mode = 0644, | |
6d456111 | 1039 | .proc_handler = proc_dointvec, |
88fc241f | 1040 | }, |
bebfa101 | 1041 | #endif |
e162b39a MSB |
1042 | #ifdef CONFIG_DETECT_HUNG_TASK |
1043 | { | |
e162b39a MSB |
1044 | .procname = "hung_task_panic", |
1045 | .data = &sysctl_hung_task_panic, | |
1046 | .maxlen = sizeof(int), | |
1047 | .mode = 0644, | |
6d456111 | 1048 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1049 | .extra1 = &zero, |
1050 | .extra2 = &one, | |
1051 | }, | |
82a1fcb9 | 1052 | { |
82a1fcb9 IM |
1053 | .procname = "hung_task_check_count", |
1054 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1055 | .maxlen = sizeof(int), |
82a1fcb9 | 1056 | .mode = 0644, |
cd64647f LZ |
1057 | .proc_handler = proc_dointvec_minmax, |
1058 | .extra1 = &zero, | |
82a1fcb9 IM |
1059 | }, |
1060 | { | |
82a1fcb9 IM |
1061 | .procname = "hung_task_timeout_secs", |
1062 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1063 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1064 | .mode = 0644, |
6d456111 | 1065 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1066 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1067 | }, |
1068 | { | |
82a1fcb9 IM |
1069 | .procname = "hung_task_warnings", |
1070 | .data = &sysctl_hung_task_warnings, | |
270750db | 1071 | .maxlen = sizeof(int), |
82a1fcb9 | 1072 | .mode = 0644, |
270750db AT |
1073 | .proc_handler = proc_dointvec_minmax, |
1074 | .extra1 = &neg_one, | |
82a1fcb9 | 1075 | }, |
c4f3b63f | 1076 | #endif |
bebfa101 AK |
1077 | #ifdef CONFIG_COMPAT |
1078 | { | |
bebfa101 AK |
1079 | .procname = "compat-log", |
1080 | .data = &compat_log, | |
1081 | .maxlen = sizeof (int), | |
1082 | .mode = 0644, | |
6d456111 | 1083 | .proc_handler = proc_dointvec, |
bebfa101 | 1084 | }, |
951f22d5 | 1085 | #endif |
23f78d4a IM |
1086 | #ifdef CONFIG_RT_MUTEXES |
1087 | { | |
23f78d4a IM |
1088 | .procname = "max_lock_depth", |
1089 | .data = &max_lock_depth, | |
1090 | .maxlen = sizeof(int), | |
1091 | .mode = 0644, | |
6d456111 | 1092 | .proc_handler = proc_dointvec, |
23f78d4a | 1093 | }, |
5096add8 | 1094 | #endif |
10a0a8d4 | 1095 | { |
10a0a8d4 JF |
1096 | .procname = "poweroff_cmd", |
1097 | .data = &poweroff_cmd, | |
1098 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1099 | .mode = 0644, | |
6d456111 | 1100 | .proc_handler = proc_dostring, |
10a0a8d4 | 1101 | }, |
0b77f5bf DH |
1102 | #ifdef CONFIG_KEYS |
1103 | { | |
0b77f5bf DH |
1104 | .procname = "keys", |
1105 | .mode = 0555, | |
1106 | .child = key_sysctls, | |
1107 | }, | |
1108 | #endif | |
cdd6c482 | 1109 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1110 | /* |
1111 | * User-space scripts rely on the existence of this file | |
1112 | * as a feature check for perf_events being enabled. | |
1113 | * | |
1114 | * So it's an ABI, do not remove! | |
1115 | */ | |
1ccd1549 | 1116 | { |
cdd6c482 IM |
1117 | .procname = "perf_event_paranoid", |
1118 | .data = &sysctl_perf_event_paranoid, | |
1119 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1120 | .mode = 0644, |
6d456111 | 1121 | .proc_handler = proc_dointvec, |
1ccd1549 | 1122 | }, |
c5078f78 | 1123 | { |
cdd6c482 IM |
1124 | .procname = "perf_event_mlock_kb", |
1125 | .data = &sysctl_perf_event_mlock, | |
1126 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1127 | .mode = 0644, |
6d456111 | 1128 | .proc_handler = proc_dointvec, |
c5078f78 | 1129 | }, |
a78ac325 | 1130 | { |
cdd6c482 IM |
1131 | .procname = "perf_event_max_sample_rate", |
1132 | .data = &sysctl_perf_event_sample_rate, | |
1133 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1134 | .mode = 0644, |
163ec435 | 1135 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1136 | .extra1 = &one, |
a78ac325 | 1137 | }, |
14c63f17 DH |
1138 | { |
1139 | .procname = "perf_cpu_time_max_percent", | |
1140 | .data = &sysctl_perf_cpu_time_max_percent, | |
1141 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1142 | .mode = 0644, | |
1143 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1144 | .extra1 = &zero, | |
1145 | .extra2 = &one_hundred, | |
1146 | }, | |
1ccd1549 | 1147 | #endif |
dfec072e VN |
1148 | #ifdef CONFIG_KMEMCHECK |
1149 | { | |
dfec072e VN |
1150 | .procname = "kmemcheck", |
1151 | .data = &kmemcheck_enabled, | |
1152 | .maxlen = sizeof(int), | |
1153 | .mode = 0644, | |
6d456111 | 1154 | .proc_handler = proc_dointvec, |
dfec072e | 1155 | }, |
cb684b5b | 1156 | #endif |
9e3961a0 PB |
1157 | { |
1158 | .procname = "panic_on_warn", | |
1159 | .data = &panic_on_warn, | |
1160 | .maxlen = sizeof(int), | |
1161 | .mode = 0644, | |
1162 | .proc_handler = proc_dointvec_minmax, | |
1163 | .extra1 = &zero, | |
1164 | .extra2 = &one, | |
1165 | }, | |
bc7a34b8 TG |
1166 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1167 | { | |
1168 | .procname = "timer_migration", | |
1169 | .data = &sysctl_timer_migration, | |
1170 | .maxlen = sizeof(unsigned int), | |
1171 | .mode = 0644, | |
1172 | .proc_handler = timer_migration_handler, | |
1173 | }, | |
1be7f75d AS |
1174 | #endif |
1175 | #ifdef CONFIG_BPF_SYSCALL | |
1176 | { | |
1177 | .procname = "unprivileged_bpf_disabled", | |
1178 | .data = &sysctl_unprivileged_bpf_disabled, | |
1179 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1180 | .mode = 0644, | |
1181 | /* only handle a transition from default "0" to "1" */ | |
1182 | .proc_handler = proc_dointvec_minmax, | |
1183 | .extra1 = &one, | |
1184 | .extra2 = &one, | |
1185 | }, | |
bc7a34b8 | 1186 | #endif |
6fce56ec | 1187 | { } |
1da177e4 LT |
1188 | }; |
1189 | ||
d8217f07 | 1190 | static struct ctl_table vm_table[] = { |
1da177e4 | 1191 | { |
1da177e4 LT |
1192 | .procname = "overcommit_memory", |
1193 | .data = &sysctl_overcommit_memory, | |
1194 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1195 | .mode = 0644, | |
cb16e95f PH |
1196 | .proc_handler = proc_dointvec_minmax, |
1197 | .extra1 = &zero, | |
1198 | .extra2 = &two, | |
1da177e4 | 1199 | }, |
fadd8fbd | 1200 | { |
fadd8fbd KH |
1201 | .procname = "panic_on_oom", |
1202 | .data = &sysctl_panic_on_oom, | |
1203 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1204 | .mode = 0644, | |
cb16e95f PH |
1205 | .proc_handler = proc_dointvec_minmax, |
1206 | .extra1 = &zero, | |
1207 | .extra2 = &two, | |
fadd8fbd | 1208 | }, |
fe071d7e | 1209 | { |
fe071d7e DR |
1210 | .procname = "oom_kill_allocating_task", |
1211 | .data = &sysctl_oom_kill_allocating_task, | |
1212 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1213 | .mode = 0644, | |
6d456111 | 1214 | .proc_handler = proc_dointvec, |
fe071d7e | 1215 | }, |
fef1bdd6 | 1216 | { |
fef1bdd6 DR |
1217 | .procname = "oom_dump_tasks", |
1218 | .data = &sysctl_oom_dump_tasks, | |
1219 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1220 | .mode = 0644, | |
6d456111 | 1221 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1222 | }, |
1da177e4 | 1223 | { |
1da177e4 LT |
1224 | .procname = "overcommit_ratio", |
1225 | .data = &sysctl_overcommit_ratio, | |
1226 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1227 | .mode = 0644, | |
49f0ce5f JM |
1228 | .proc_handler = overcommit_ratio_handler, |
1229 | }, | |
1230 | { | |
1231 | .procname = "overcommit_kbytes", | |
1232 | .data = &sysctl_overcommit_kbytes, | |
1233 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1234 | .mode = 0644, | |
1235 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1236 | }, |
1237 | { | |
1da177e4 LT |
1238 | .procname = "page-cluster", |
1239 | .data = &page_cluster, | |
1240 | .maxlen = sizeof(int), | |
1241 | .mode = 0644, | |
cb16e95f PH |
1242 | .proc_handler = proc_dointvec_minmax, |
1243 | .extra1 = &zero, | |
1da177e4 LT |
1244 | }, |
1245 | { | |
1da177e4 LT |
1246 | .procname = "dirty_background_ratio", |
1247 | .data = &dirty_background_ratio, | |
1248 | .maxlen = sizeof(dirty_background_ratio), | |
1249 | .mode = 0644, | |
6d456111 | 1250 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1251 | .extra1 = &zero, |
1252 | .extra2 = &one_hundred, | |
1253 | }, | |
2da02997 | 1254 | { |
2da02997 DR |
1255 | .procname = "dirty_background_bytes", |
1256 | .data = &dirty_background_bytes, | |
1257 | .maxlen = sizeof(dirty_background_bytes), | |
1258 | .mode = 0644, | |
6d456111 | 1259 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1260 | .extra1 = &one_ul, |
2da02997 | 1261 | }, |
1da177e4 | 1262 | { |
1da177e4 LT |
1263 | .procname = "dirty_ratio", |
1264 | .data = &vm_dirty_ratio, | |
1265 | .maxlen = sizeof(vm_dirty_ratio), | |
1266 | .mode = 0644, | |
6d456111 | 1267 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1268 | .extra1 = &zero, |
1269 | .extra2 = &one_hundred, | |
1270 | }, | |
2da02997 | 1271 | { |
2da02997 DR |
1272 | .procname = "dirty_bytes", |
1273 | .data = &vm_dirty_bytes, | |
1274 | .maxlen = sizeof(vm_dirty_bytes), | |
1275 | .mode = 0644, | |
6d456111 | 1276 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1277 | .extra1 = &dirty_bytes_min, |
2da02997 | 1278 | }, |
1da177e4 | 1279 | { |
1da177e4 | 1280 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1281 | .data = &dirty_writeback_interval, |
1282 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1283 | .mode = 0644, |
6d456111 | 1284 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1285 | }, |
1286 | { | |
1da177e4 | 1287 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1288 | .data = &dirty_expire_interval, |
1289 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1290 | .mode = 0644, |
cb16e95f PH |
1291 | .proc_handler = proc_dointvec_minmax, |
1292 | .extra1 = &zero, | |
1da177e4 | 1293 | }, |
1efff914 TT |
1294 | { |
1295 | .procname = "dirtytime_expire_seconds", | |
1296 | .data = &dirtytime_expire_interval, | |
1297 | .maxlen = sizeof(dirty_expire_interval), | |
1298 | .mode = 0644, | |
1299 | .proc_handler = dirtytime_interval_handler, | |
1300 | .extra1 = &zero, | |
1301 | }, | |
1da177e4 | 1302 | { |
3965c9ae WL |
1303 | .procname = "nr_pdflush_threads", |
1304 | .mode = 0444 /* read-only */, | |
1305 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1306 | }, |
1307 | { | |
1da177e4 LT |
1308 | .procname = "swappiness", |
1309 | .data = &vm_swappiness, | |
1310 | .maxlen = sizeof(vm_swappiness), | |
1311 | .mode = 0644, | |
6d456111 | 1312 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1313 | .extra1 = &zero, |
1314 | .extra2 = &one_hundred, | |
1315 | }, | |
1316 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1317 | { |
1da177e4 | 1318 | .procname = "nr_hugepages", |
e5ff2159 | 1319 | .data = NULL, |
1da177e4 LT |
1320 | .maxlen = sizeof(unsigned long), |
1321 | .mode = 0644, | |
6d456111 | 1322 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1323 | }, |
1324 | #ifdef CONFIG_NUMA | |
1325 | { | |
1326 | .procname = "nr_hugepages_mempolicy", | |
1327 | .data = NULL, | |
1328 | .maxlen = sizeof(unsigned long), | |
1329 | .mode = 0644, | |
1330 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 LS |
1331 | }, |
1332 | #endif | |
1da177e4 | 1333 | { |
1da177e4 LT |
1334 | .procname = "hugetlb_shm_group", |
1335 | .data = &sysctl_hugetlb_shm_group, | |
1336 | .maxlen = sizeof(gid_t), | |
1337 | .mode = 0644, | |
6d456111 | 1338 | .proc_handler = proc_dointvec, |
1da177e4 | 1339 | }, |
396faf03 | 1340 | { |
396faf03 MG |
1341 | .procname = "hugepages_treat_as_movable", |
1342 | .data = &hugepages_treat_as_movable, | |
1343 | .maxlen = sizeof(int), | |
1344 | .mode = 0644, | |
86cdb465 | 1345 | .proc_handler = proc_dointvec, |
396faf03 | 1346 | }, |
d1c3fb1f | 1347 | { |
d1c3fb1f | 1348 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1349 | .data = NULL, |
1350 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1351 | .mode = 0644, |
6d456111 | 1352 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1353 | }, |
1da177e4 LT |
1354 | #endif |
1355 | { | |
1da177e4 LT |
1356 | .procname = "lowmem_reserve_ratio", |
1357 | .data = &sysctl_lowmem_reserve_ratio, | |
1358 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1359 | .mode = 0644, | |
6d456111 | 1360 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1361 | }, |
9d0243bc | 1362 | { |
9d0243bc AM |
1363 | .procname = "drop_caches", |
1364 | .data = &sysctl_drop_caches, | |
1365 | .maxlen = sizeof(int), | |
1366 | .mode = 0644, | |
1367 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1368 | .extra1 = &one, |
5509a5d2 | 1369 | .extra2 = &four, |
9d0243bc | 1370 | }, |
76ab0f53 MG |
1371 | #ifdef CONFIG_COMPACTION |
1372 | { | |
1373 | .procname = "compact_memory", | |
1374 | .data = &sysctl_compact_memory, | |
1375 | .maxlen = sizeof(int), | |
1376 | .mode = 0200, | |
1377 | .proc_handler = sysctl_compaction_handler, | |
1378 | }, | |
5e771905 MG |
1379 | { |
1380 | .procname = "extfrag_threshold", | |
1381 | .data = &sysctl_extfrag_threshold, | |
1382 | .maxlen = sizeof(int), | |
1383 | .mode = 0644, | |
1384 | .proc_handler = sysctl_extfrag_handler, | |
1385 | .extra1 = &min_extfrag_threshold, | |
1386 | .extra2 = &max_extfrag_threshold, | |
1387 | }, | |
5bbe3547 EM |
1388 | { |
1389 | .procname = "compact_unevictable_allowed", | |
1390 | .data = &sysctl_compact_unevictable_allowed, | |
1391 | .maxlen = sizeof(int), | |
1392 | .mode = 0644, | |
1393 | .proc_handler = proc_dointvec, | |
1394 | .extra1 = &zero, | |
1395 | .extra2 = &one, | |
1396 | }, | |
5e771905 | 1397 | |
76ab0f53 | 1398 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1399 | { |
1da177e4 LT |
1400 | .procname = "min_free_kbytes", |
1401 | .data = &min_free_kbytes, | |
1402 | .maxlen = sizeof(min_free_kbytes), | |
1403 | .mode = 0644, | |
6d456111 | 1404 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1405 | .extra1 = &zero, |
1406 | }, | |
795ae7a0 JW |
1407 | { |
1408 | .procname = "watermark_scale_factor", | |
1409 | .data = &watermark_scale_factor, | |
1410 | .maxlen = sizeof(watermark_scale_factor), | |
1411 | .mode = 0644, | |
1412 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1413 | .extra1 = &one, | |
1414 | .extra2 = &one_thousand, | |
1415 | }, | |
8ad4b1fb | 1416 | { |
8ad4b1fb RS |
1417 | .procname = "percpu_pagelist_fraction", |
1418 | .data = &percpu_pagelist_fraction, | |
1419 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1420 | .mode = 0644, | |
6d456111 | 1421 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1422 | .extra1 = &zero, |
8ad4b1fb | 1423 | }, |
1da177e4 LT |
1424 | #ifdef CONFIG_MMU |
1425 | { | |
1da177e4 LT |
1426 | .procname = "max_map_count", |
1427 | .data = &sysctl_max_map_count, | |
1428 | .maxlen = sizeof(sysctl_max_map_count), | |
1429 | .mode = 0644, | |
3e26120c | 1430 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1431 | .extra1 = &zero, |
1da177e4 | 1432 | }, |
dd8632a1 PM |
1433 | #else |
1434 | { | |
dd8632a1 PM |
1435 | .procname = "nr_trim_pages", |
1436 | .data = &sysctl_nr_trim_pages, | |
1437 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1438 | .mode = 0644, | |
6d456111 | 1439 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1440 | .extra1 = &zero, |
1441 | }, | |
1da177e4 LT |
1442 | #endif |
1443 | { | |
1da177e4 LT |
1444 | .procname = "laptop_mode", |
1445 | .data = &laptop_mode, | |
1446 | .maxlen = sizeof(laptop_mode), | |
1447 | .mode = 0644, | |
6d456111 | 1448 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1449 | }, |
1450 | { | |
1da177e4 LT |
1451 | .procname = "block_dump", |
1452 | .data = &block_dump, | |
1453 | .maxlen = sizeof(block_dump), | |
1454 | .mode = 0644, | |
6d456111 | 1455 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1456 | .extra1 = &zero, |
1457 | }, | |
1458 | { | |
1da177e4 LT |
1459 | .procname = "vfs_cache_pressure", |
1460 | .data = &sysctl_vfs_cache_pressure, | |
1461 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1462 | .mode = 0644, | |
6d456111 | 1463 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1464 | .extra1 = &zero, |
1465 | }, | |
1466 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1467 | { | |
1da177e4 LT |
1468 | .procname = "legacy_va_layout", |
1469 | .data = &sysctl_legacy_va_layout, | |
1470 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1471 | .mode = 0644, | |
6d456111 | 1472 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1473 | .extra1 = &zero, |
1474 | }, | |
1475 | #endif | |
1743660b CL |
1476 | #ifdef CONFIG_NUMA |
1477 | { | |
1743660b CL |
1478 | .procname = "zone_reclaim_mode", |
1479 | .data = &zone_reclaim_mode, | |
1480 | .maxlen = sizeof(zone_reclaim_mode), | |
1481 | .mode = 0644, | |
6d456111 | 1482 | .proc_handler = proc_dointvec, |
c84db23c | 1483 | .extra1 = &zero, |
1743660b | 1484 | }, |
9614634f | 1485 | { |
9614634f CL |
1486 | .procname = "min_unmapped_ratio", |
1487 | .data = &sysctl_min_unmapped_ratio, | |
1488 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1489 | .mode = 0644, | |
6d456111 | 1490 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1491 | .extra1 = &zero, |
1492 | .extra2 = &one_hundred, | |
1493 | }, | |
0ff38490 | 1494 | { |
0ff38490 CL |
1495 | .procname = "min_slab_ratio", |
1496 | .data = &sysctl_min_slab_ratio, | |
1497 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1498 | .mode = 0644, | |
6d456111 | 1499 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1500 | .extra1 = &zero, |
1501 | .extra2 = &one_hundred, | |
1502 | }, | |
e6e5494c | 1503 | #endif |
77461ab3 CL |
1504 | #ifdef CONFIG_SMP |
1505 | { | |
77461ab3 CL |
1506 | .procname = "stat_interval", |
1507 | .data = &sysctl_stat_interval, | |
1508 | .maxlen = sizeof(sysctl_stat_interval), | |
1509 | .mode = 0644, | |
6d456111 | 1510 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1511 | }, |
1512 | #endif | |
6e141546 | 1513 | #ifdef CONFIG_MMU |
ed032189 | 1514 | { |
ed032189 | 1515 | .procname = "mmap_min_addr", |
788084ab EP |
1516 | .data = &dac_mmap_min_addr, |
1517 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1518 | .mode = 0644, |
6d456111 | 1519 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1520 | }, |
6e141546 | 1521 | #endif |
f0c0b2b8 KH |
1522 | #ifdef CONFIG_NUMA |
1523 | { | |
f0c0b2b8 KH |
1524 | .procname = "numa_zonelist_order", |
1525 | .data = &numa_zonelist_order, | |
1526 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1527 | .mode = 0644, | |
6d456111 | 1528 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1529 | }, |
1530 | #endif | |
2b8232ce | 1531 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1532 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1533 | { |
e6e5494c | 1534 | .procname = "vdso_enabled", |
3d7ee969 AL |
1535 | #ifdef CONFIG_X86_32 |
1536 | .data = &vdso32_enabled, | |
1537 | .maxlen = sizeof(vdso32_enabled), | |
1538 | #else | |
e6e5494c IM |
1539 | .data = &vdso_enabled, |
1540 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1541 | #endif |
e6e5494c | 1542 | .mode = 0644, |
6d456111 | 1543 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1544 | .extra1 = &zero, |
1545 | }, | |
1da177e4 | 1546 | #endif |
195cf453 BG |
1547 | #ifdef CONFIG_HIGHMEM |
1548 | { | |
195cf453 BG |
1549 | .procname = "highmem_is_dirtyable", |
1550 | .data = &vm_highmem_is_dirtyable, | |
1551 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1552 | .mode = 0644, | |
6d456111 | 1553 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1554 | .extra1 = &zero, |
1555 | .extra2 = &one, | |
1556 | }, | |
1557 | #endif | |
6a46079c AK |
1558 | #ifdef CONFIG_MEMORY_FAILURE |
1559 | { | |
6a46079c AK |
1560 | .procname = "memory_failure_early_kill", |
1561 | .data = &sysctl_memory_failure_early_kill, | |
1562 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1563 | .mode = 0644, | |
6d456111 | 1564 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1565 | .extra1 = &zero, |
1566 | .extra2 = &one, | |
1567 | }, | |
1568 | { | |
6a46079c AK |
1569 | .procname = "memory_failure_recovery", |
1570 | .data = &sysctl_memory_failure_recovery, | |
1571 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1572 | .mode = 0644, | |
6d456111 | 1573 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1574 | .extra1 = &zero, |
1575 | .extra2 = &one, | |
1576 | }, | |
1577 | #endif | |
c9b1d098 AS |
1578 | { |
1579 | .procname = "user_reserve_kbytes", | |
1580 | .data = &sysctl_user_reserve_kbytes, | |
1581 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1582 | .mode = 0644, | |
1583 | .proc_handler = proc_doulongvec_minmax, | |
1584 | }, | |
4eeab4f5 AS |
1585 | { |
1586 | .procname = "admin_reserve_kbytes", | |
1587 | .data = &sysctl_admin_reserve_kbytes, | |
1588 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1589 | .mode = 0644, | |
1590 | .proc_handler = proc_doulongvec_minmax, | |
1591 | }, | |
d07e2259 DC |
1592 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1593 | { | |
1594 | .procname = "mmap_rnd_bits", | |
1595 | .data = &mmap_rnd_bits, | |
1596 | .maxlen = sizeof(mmap_rnd_bits), | |
1597 | .mode = 0600, | |
1598 | .proc_handler = proc_dointvec_minmax, | |
1599 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1600 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1601 | }, | |
1602 | #endif | |
1603 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1604 | { | |
1605 | .procname = "mmap_rnd_compat_bits", | |
1606 | .data = &mmap_rnd_compat_bits, | |
1607 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1608 | .mode = 0600, | |
1609 | .proc_handler = proc_dointvec_minmax, | |
1610 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1611 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1612 | }, | |
1613 | #endif | |
6fce56ec | 1614 | { } |
1da177e4 LT |
1615 | }; |
1616 | ||
d8217f07 | 1617 | static struct ctl_table fs_table[] = { |
1da177e4 | 1618 | { |
1da177e4 LT |
1619 | .procname = "inode-nr", |
1620 | .data = &inodes_stat, | |
3942c07c | 1621 | .maxlen = 2*sizeof(long), |
1da177e4 | 1622 | .mode = 0444, |
cffbc8aa | 1623 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1624 | }, |
1625 | { | |
1da177e4 LT |
1626 | .procname = "inode-state", |
1627 | .data = &inodes_stat, | |
3942c07c | 1628 | .maxlen = 7*sizeof(long), |
1da177e4 | 1629 | .mode = 0444, |
cffbc8aa | 1630 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1631 | }, |
1632 | { | |
1da177e4 LT |
1633 | .procname = "file-nr", |
1634 | .data = &files_stat, | |
518de9b3 | 1635 | .maxlen = sizeof(files_stat), |
1da177e4 | 1636 | .mode = 0444, |
6d456111 | 1637 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1638 | }, |
1639 | { | |
1da177e4 LT |
1640 | .procname = "file-max", |
1641 | .data = &files_stat.max_files, | |
518de9b3 | 1642 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1643 | .mode = 0644, |
518de9b3 | 1644 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1645 | }, |
9cfe015a | 1646 | { |
9cfe015a ED |
1647 | .procname = "nr_open", |
1648 | .data = &sysctl_nr_open, | |
1649 | .maxlen = sizeof(int), | |
1650 | .mode = 0644, | |
6d456111 | 1651 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1652 | .extra1 = &sysctl_nr_open_min, |
1653 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1654 | }, |
1da177e4 | 1655 | { |
1da177e4 LT |
1656 | .procname = "dentry-state", |
1657 | .data = &dentry_stat, | |
3942c07c | 1658 | .maxlen = 6*sizeof(long), |
1da177e4 | 1659 | .mode = 0444, |
312d3ca8 | 1660 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1661 | }, |
1662 | { | |
1da177e4 LT |
1663 | .procname = "overflowuid", |
1664 | .data = &fs_overflowuid, | |
1665 | .maxlen = sizeof(int), | |
1666 | .mode = 0644, | |
6d456111 | 1667 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1668 | .extra1 = &minolduid, |
1669 | .extra2 = &maxolduid, | |
1670 | }, | |
1671 | { | |
1da177e4 LT |
1672 | .procname = "overflowgid", |
1673 | .data = &fs_overflowgid, | |
1674 | .maxlen = sizeof(int), | |
1675 | .mode = 0644, | |
6d456111 | 1676 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1677 | .extra1 = &minolduid, |
1678 | .extra2 = &maxolduid, | |
1679 | }, | |
bfcd17a6 | 1680 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1681 | { |
1da177e4 LT |
1682 | .procname = "leases-enable", |
1683 | .data = &leases_enable, | |
1684 | .maxlen = sizeof(int), | |
1685 | .mode = 0644, | |
6d456111 | 1686 | .proc_handler = proc_dointvec, |
1da177e4 | 1687 | }, |
bfcd17a6 | 1688 | #endif |
1da177e4 LT |
1689 | #ifdef CONFIG_DNOTIFY |
1690 | { | |
1da177e4 LT |
1691 | .procname = "dir-notify-enable", |
1692 | .data = &dir_notify_enable, | |
1693 | .maxlen = sizeof(int), | |
1694 | .mode = 0644, | |
6d456111 | 1695 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1696 | }, |
1697 | #endif | |
1698 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1699 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1700 | { |
1da177e4 LT |
1701 | .procname = "lease-break-time", |
1702 | .data = &lease_break_time, | |
1703 | .maxlen = sizeof(int), | |
1704 | .mode = 0644, | |
6d456111 | 1705 | .proc_handler = proc_dointvec, |
1da177e4 | 1706 | }, |
bfcd17a6 | 1707 | #endif |
ebf3f09c | 1708 | #ifdef CONFIG_AIO |
1da177e4 | 1709 | { |
1da177e4 LT |
1710 | .procname = "aio-nr", |
1711 | .data = &aio_nr, | |
1712 | .maxlen = sizeof(aio_nr), | |
1713 | .mode = 0444, | |
6d456111 | 1714 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1715 | }, |
1716 | { | |
1da177e4 LT |
1717 | .procname = "aio-max-nr", |
1718 | .data = &aio_max_nr, | |
1719 | .maxlen = sizeof(aio_max_nr), | |
1720 | .mode = 0644, | |
6d456111 | 1721 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1722 | }, |
ebf3f09c | 1723 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1724 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1725 | { |
0399cb08 RL |
1726 | .procname = "inotify", |
1727 | .mode = 0555, | |
1728 | .child = inotify_table, | |
1729 | }, | |
1730 | #endif | |
7ef9964e DL |
1731 | #ifdef CONFIG_EPOLL |
1732 | { | |
1733 | .procname = "epoll", | |
1734 | .mode = 0555, | |
1735 | .child = epoll_table, | |
1736 | }, | |
1737 | #endif | |
1da177e4 | 1738 | #endif |
800179c9 KC |
1739 | { |
1740 | .procname = "protected_symlinks", | |
1741 | .data = &sysctl_protected_symlinks, | |
1742 | .maxlen = sizeof(int), | |
1743 | .mode = 0600, | |
1744 | .proc_handler = proc_dointvec_minmax, | |
1745 | .extra1 = &zero, | |
1746 | .extra2 = &one, | |
1747 | }, | |
1748 | { | |
1749 | .procname = "protected_hardlinks", | |
1750 | .data = &sysctl_protected_hardlinks, | |
1751 | .maxlen = sizeof(int), | |
1752 | .mode = 0600, | |
1753 | .proc_handler = proc_dointvec_minmax, | |
1754 | .extra1 = &zero, | |
1755 | .extra2 = &one, | |
1756 | }, | |
d6e71144 | 1757 | { |
d6e71144 AC |
1758 | .procname = "suid_dumpable", |
1759 | .data = &suid_dumpable, | |
1760 | .maxlen = sizeof(int), | |
1761 | .mode = 0644, | |
54b50199 | 1762 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1763 | .extra1 = &zero, |
1764 | .extra2 = &two, | |
d6e71144 | 1765 | }, |
2abc26fc EB |
1766 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1767 | { | |
2abc26fc EB |
1768 | .procname = "binfmt_misc", |
1769 | .mode = 0555, | |
f9bd6733 | 1770 | .child = sysctl_mount_point, |
2abc26fc EB |
1771 | }, |
1772 | #endif | |
b492e95b | 1773 | { |
ff9da691 JA |
1774 | .procname = "pipe-max-size", |
1775 | .data = &pipe_max_size, | |
b492e95b JA |
1776 | .maxlen = sizeof(int), |
1777 | .mode = 0644, | |
ff9da691 JA |
1778 | .proc_handler = &pipe_proc_fn, |
1779 | .extra1 = &pipe_min_size, | |
b492e95b | 1780 | }, |
759c0114 WT |
1781 | { |
1782 | .procname = "pipe-user-pages-hard", | |
1783 | .data = &pipe_user_pages_hard, | |
1784 | .maxlen = sizeof(pipe_user_pages_hard), | |
1785 | .mode = 0644, | |
1786 | .proc_handler = proc_doulongvec_minmax, | |
1787 | }, | |
1788 | { | |
1789 | .procname = "pipe-user-pages-soft", | |
1790 | .data = &pipe_user_pages_soft, | |
1791 | .maxlen = sizeof(pipe_user_pages_soft), | |
1792 | .mode = 0644, | |
1793 | .proc_handler = proc_doulongvec_minmax, | |
1794 | }, | |
6fce56ec | 1795 | { } |
1da177e4 LT |
1796 | }; |
1797 | ||
d8217f07 | 1798 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1799 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1800 | { |
abd4f750 MAS |
1801 | .procname = "exception-trace", |
1802 | .data = &show_unhandled_signals, | |
1803 | .maxlen = sizeof(int), | |
1804 | .mode = 0644, | |
1805 | .proc_handler = proc_dointvec | |
1806 | }, | |
b2be84df MH |
1807 | #endif |
1808 | #if defined(CONFIG_OPTPROBES) | |
1809 | { | |
1810 | .procname = "kprobes-optimization", | |
1811 | .data = &sysctl_kprobes_optimization, | |
1812 | .maxlen = sizeof(int), | |
1813 | .mode = 0644, | |
1814 | .proc_handler = proc_kprobes_optimization_handler, | |
1815 | .extra1 = &zero, | |
1816 | .extra2 = &one, | |
1817 | }, | |
abd4f750 | 1818 | #endif |
6fce56ec | 1819 | { } |
1da177e4 LT |
1820 | }; |
1821 | ||
d8217f07 | 1822 | static struct ctl_table dev_table[] = { |
6fce56ec | 1823 | { } |
0eeca283 | 1824 | }; |
1da177e4 | 1825 | |
de4e83bd | 1826 | int __init sysctl_init(void) |
d912b0cc | 1827 | { |
fd4b616b SR |
1828 | struct ctl_table_header *hdr; |
1829 | ||
1830 | hdr = register_sysctl_table(sysctl_base_table); | |
1831 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1832 | return 0; |
1833 | } | |
1834 | ||
b89a8171 EB |
1835 | #endif /* CONFIG_SYSCTL */ |
1836 | ||
1da177e4 LT |
1837 | /* |
1838 | * /proc/sys support | |
1839 | */ | |
1840 | ||
b89a8171 | 1841 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1842 | |
f8808300 KC |
1843 | static int _proc_do_string(char *data, int maxlen, int write, |
1844 | char __user *buffer, | |
b1ba4ddd | 1845 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1846 | { |
1847 | size_t len; | |
1848 | char __user *p; | |
1849 | char c; | |
8d060877 ON |
1850 | |
1851 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1852 | *lenp = 0; |
1853 | return 0; | |
1854 | } | |
8d060877 | 1855 | |
1da177e4 | 1856 | if (write) { |
f4aacea2 KC |
1857 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1858 | /* Only continue writes not past the end of buffer. */ | |
1859 | len = strlen(data); | |
1860 | if (len > maxlen - 1) | |
1861 | len = maxlen - 1; | |
1862 | ||
1863 | if (*ppos > len) | |
1864 | return 0; | |
1865 | len = *ppos; | |
1866 | } else { | |
1867 | /* Start writing from beginning of buffer. */ | |
1868 | len = 0; | |
1869 | } | |
1870 | ||
2ca9bb45 | 1871 | *ppos += *lenp; |
1da177e4 | 1872 | p = buffer; |
2ca9bb45 | 1873 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1874 | if (get_user(c, p++)) |
1875 | return -EFAULT; | |
1876 | if (c == 0 || c == '\n') | |
1877 | break; | |
2ca9bb45 | 1878 | data[len++] = c; |
1da177e4 | 1879 | } |
f8808300 | 1880 | data[len] = 0; |
1da177e4 | 1881 | } else { |
f5dd3d6f SV |
1882 | len = strlen(data); |
1883 | if (len > maxlen) | |
1884 | len = maxlen; | |
8d060877 ON |
1885 | |
1886 | if (*ppos > len) { | |
1887 | *lenp = 0; | |
1888 | return 0; | |
1889 | } | |
1890 | ||
1891 | data += *ppos; | |
1892 | len -= *ppos; | |
1893 | ||
1da177e4 LT |
1894 | if (len > *lenp) |
1895 | len = *lenp; | |
1896 | if (len) | |
f8808300 | 1897 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1898 | return -EFAULT; |
1899 | if (len < *lenp) { | |
f8808300 | 1900 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1901 | return -EFAULT; |
1902 | len++; | |
1903 | } | |
1904 | *lenp = len; | |
1905 | *ppos += len; | |
1906 | } | |
1907 | return 0; | |
1908 | } | |
1909 | ||
f4aacea2 KC |
1910 | static void warn_sysctl_write(struct ctl_table *table) |
1911 | { | |
1912 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1913 | "This will not be supported in the future. To silence this\n" | |
1914 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1915 | current->comm, table->procname); | |
1916 | } | |
1917 | ||
f5dd3d6f SV |
1918 | /** |
1919 | * proc_dostring - read a string sysctl | |
1920 | * @table: the sysctl table | |
1921 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1922 | * @buffer: the user buffer |
1923 | * @lenp: the size of the user buffer | |
1924 | * @ppos: file position | |
1925 | * | |
1926 | * Reads/writes a string from/to the user buffer. If the kernel | |
1927 | * buffer provided is not large enough to hold the string, the | |
1928 | * string is truncated. The copied string is %NULL-terminated. | |
1929 | * If the string is being read by the user process, it is copied | |
1930 | * and a newline '\n' is added. It is truncated if the buffer is | |
1931 | * not large enough. | |
1932 | * | |
1933 | * Returns 0 on success. | |
1934 | */ | |
8d65af78 | 1935 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1936 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1937 | { | |
f4aacea2 KC |
1938 | if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) |
1939 | warn_sysctl_write(table); | |
1940 | ||
f8808300 KC |
1941 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
1942 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
1943 | } |
1944 | ||
00b7c339 AW |
1945 | static size_t proc_skip_spaces(char **buf) |
1946 | { | |
1947 | size_t ret; | |
1948 | char *tmp = skip_spaces(*buf); | |
1949 | ret = tmp - *buf; | |
1950 | *buf = tmp; | |
1951 | return ret; | |
1952 | } | |
1953 | ||
9f977fb7 OP |
1954 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1955 | { | |
1956 | while (*size) { | |
1957 | if (**buf != v) | |
1958 | break; | |
1959 | (*size)--; | |
1960 | (*buf)++; | |
1961 | } | |
1962 | } | |
1963 | ||
00b7c339 AW |
1964 | #define TMPBUFLEN 22 |
1965 | /** | |
0fc377bd | 1966 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1967 | * |
0fc377bd RD |
1968 | * @buf: a kernel buffer |
1969 | * @size: size of the kernel buffer | |
1970 | * @val: this is where the number will be stored | |
1971 | * @neg: set to %TRUE if number is negative | |
1972 | * @perm_tr: a vector which contains the allowed trailers | |
1973 | * @perm_tr_len: size of the perm_tr vector | |
1974 | * @tr: pointer to store the trailer character | |
00b7c339 | 1975 | * |
0fc377bd RD |
1976 | * In case of success %0 is returned and @buf and @size are updated with |
1977 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1978 | * character exists (size is non-zero after returning from this | |
1979 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1980 | */ |
1981 | static int proc_get_long(char **buf, size_t *size, | |
1982 | unsigned long *val, bool *neg, | |
1983 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1984 | { | |
1985 | int len; | |
1986 | char *p, tmp[TMPBUFLEN]; | |
1987 | ||
1988 | if (!*size) | |
1989 | return -EINVAL; | |
1990 | ||
1991 | len = *size; | |
1992 | if (len > TMPBUFLEN - 1) | |
1993 | len = TMPBUFLEN - 1; | |
1994 | ||
1995 | memcpy(tmp, *buf, len); | |
1996 | ||
1997 | tmp[len] = 0; | |
1998 | p = tmp; | |
1999 | if (*p == '-' && *size > 1) { | |
2000 | *neg = true; | |
2001 | p++; | |
2002 | } else | |
2003 | *neg = false; | |
2004 | if (!isdigit(*p)) | |
2005 | return -EINVAL; | |
2006 | ||
2007 | *val = simple_strtoul(p, &p, 0); | |
2008 | ||
2009 | len = p - tmp; | |
2010 | ||
2011 | /* We don't know if the next char is whitespace thus we may accept | |
2012 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2013 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2014 | if (len == TMPBUFLEN - 1) | |
2015 | return -EINVAL; | |
2016 | ||
2017 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2018 | return -EINVAL; | |
1da177e4 | 2019 | |
00b7c339 AW |
2020 | if (tr && (len < *size)) |
2021 | *tr = *p; | |
2022 | ||
2023 | *buf += len; | |
2024 | *size -= len; | |
2025 | ||
2026 | return 0; | |
2027 | } | |
2028 | ||
2029 | /** | |
0fc377bd | 2030 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2031 | * |
0fc377bd RD |
2032 | * @buf: the user buffer |
2033 | * @size: the size of the user buffer | |
2034 | * @val: the integer to be converted | |
2035 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2036 | * |
0fc377bd RD |
2037 | * In case of success %0 is returned and @buf and @size are updated with |
2038 | * the amount of bytes written. | |
00b7c339 AW |
2039 | */ |
2040 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2041 | bool neg) | |
2042 | { | |
2043 | int len; | |
2044 | char tmp[TMPBUFLEN], *p = tmp; | |
2045 | ||
2046 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2047 | len = strlen(tmp); | |
2048 | if (len > *size) | |
2049 | len = *size; | |
2050 | if (copy_to_user(*buf, tmp, len)) | |
2051 | return -EFAULT; | |
2052 | *size -= len; | |
2053 | *buf += len; | |
2054 | return 0; | |
2055 | } | |
2056 | #undef TMPBUFLEN | |
2057 | ||
2058 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2059 | { | |
2060 | if (*size) { | |
2061 | char __user **buffer = (char __user **)buf; | |
2062 | if (put_user(c, *buffer)) | |
2063 | return -EFAULT; | |
2064 | (*size)--, (*buffer)++; | |
2065 | *buf = *buffer; | |
2066 | } | |
2067 | return 0; | |
2068 | } | |
1da177e4 | 2069 | |
00b7c339 | 2070 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2071 | int *valp, |
2072 | int write, void *data) | |
2073 | { | |
2074 | if (write) { | |
230633d1 HS |
2075 | if (*negp) { |
2076 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2077 | return -EINVAL; | |
2078 | *valp = -*lvalp; | |
2079 | } else { | |
2080 | if (*lvalp > (unsigned long) INT_MAX) | |
2081 | return -EINVAL; | |
2082 | *valp = *lvalp; | |
2083 | } | |
1da177e4 LT |
2084 | } else { |
2085 | int val = *valp; | |
2086 | if (val < 0) { | |
00b7c339 | 2087 | *negp = true; |
9a5bc726 | 2088 | *lvalp = -(unsigned long)val; |
1da177e4 | 2089 | } else { |
00b7c339 | 2090 | *negp = false; |
1da177e4 LT |
2091 | *lvalp = (unsigned long)val; |
2092 | } | |
2093 | } | |
2094 | return 0; | |
2095 | } | |
2096 | ||
00b7c339 AW |
2097 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2098 | ||
d8217f07 | 2099 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2100 | int write, void __user *buffer, |
fcfbd547 | 2101 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2102 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2103 | int write, void *data), |
2104 | void *data) | |
2105 | { | |
00b7c339 | 2106 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2107 | size_t left; |
70f6cbb6 | 2108 | char *kbuf = NULL, *p; |
1da177e4 | 2109 | |
00b7c339 | 2110 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2111 | *lenp = 0; |
2112 | return 0; | |
2113 | } | |
2114 | ||
fcfbd547 | 2115 | i = (int *) tbl_data; |
1da177e4 LT |
2116 | vleft = table->maxlen / sizeof(*i); |
2117 | left = *lenp; | |
2118 | ||
2119 | if (!conv) | |
2120 | conv = do_proc_dointvec_conv; | |
2121 | ||
00b7c339 | 2122 | if (write) { |
f4aacea2 KC |
2123 | if (*ppos) { |
2124 | switch (sysctl_writes_strict) { | |
2125 | case SYSCTL_WRITES_STRICT: | |
2126 | goto out; | |
2127 | case SYSCTL_WRITES_WARN: | |
2128 | warn_sysctl_write(table); | |
2129 | break; | |
2130 | default: | |
2131 | break; | |
2132 | } | |
2133 | } | |
2134 | ||
00b7c339 AW |
2135 | if (left > PAGE_SIZE - 1) |
2136 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2137 | p = kbuf = memdup_user_nul(buffer, left); |
2138 | if (IS_ERR(kbuf)) | |
2139 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2140 | } |
2141 | ||
1da177e4 | 2142 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2143 | unsigned long lval; |
2144 | bool neg; | |
1da177e4 | 2145 | |
00b7c339 | 2146 | if (write) { |
70f6cbb6 | 2147 | left -= proc_skip_spaces(&p); |
1da177e4 | 2148 | |
563b0467 O |
2149 | if (!left) |
2150 | break; | |
70f6cbb6 | 2151 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2152 | proc_wspace_sep, |
2153 | sizeof(proc_wspace_sep), NULL); | |
2154 | if (err) | |
1da177e4 | 2155 | break; |
00b7c339 AW |
2156 | if (conv(&neg, &lval, i, 1, data)) { |
2157 | err = -EINVAL; | |
1da177e4 | 2158 | break; |
00b7c339 | 2159 | } |
1da177e4 | 2160 | } else { |
00b7c339 AW |
2161 | if (conv(&neg, &lval, i, 0, data)) { |
2162 | err = -EINVAL; | |
2163 | break; | |
2164 | } | |
1da177e4 | 2165 | if (!first) |
00b7c339 AW |
2166 | err = proc_put_char(&buffer, &left, '\t'); |
2167 | if (err) | |
2168 | break; | |
2169 | err = proc_put_long(&buffer, &left, lval, neg); | |
2170 | if (err) | |
1da177e4 | 2171 | break; |
1da177e4 LT |
2172 | } |
2173 | } | |
2174 | ||
00b7c339 AW |
2175 | if (!write && !first && left && !err) |
2176 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2177 | if (write && !err && left) |
70f6cbb6 | 2178 | left -= proc_skip_spaces(&p); |
1da177e4 | 2179 | if (write) { |
70f6cbb6 | 2180 | kfree(kbuf); |
00b7c339 AW |
2181 | if (first) |
2182 | return err ? : -EINVAL; | |
1da177e4 | 2183 | } |
1da177e4 | 2184 | *lenp -= left; |
f4aacea2 | 2185 | out: |
1da177e4 | 2186 | *ppos += *lenp; |
00b7c339 | 2187 | return err; |
1da177e4 LT |
2188 | } |
2189 | ||
8d65af78 | 2190 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2191 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2192 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2193 | int write, void *data), |
2194 | void *data) | |
2195 | { | |
8d65af78 | 2196 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2197 | buffer, lenp, ppos, conv, data); |
2198 | } | |
2199 | ||
1da177e4 LT |
2200 | /** |
2201 | * proc_dointvec - read a vector of integers | |
2202 | * @table: the sysctl table | |
2203 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2204 | * @buffer: the user buffer |
2205 | * @lenp: the size of the user buffer | |
2206 | * @ppos: file position | |
2207 | * | |
2208 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2209 | * values from/to the user buffer, treated as an ASCII string. | |
2210 | * | |
2211 | * Returns 0 on success. | |
2212 | */ | |
8d65af78 | 2213 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2214 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2215 | { | |
8d65af78 | 2216 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2217 | NULL,NULL); |
2218 | } | |
2219 | ||
34f5a398 | 2220 | /* |
25ddbb18 AK |
2221 | * Taint values can only be increased |
2222 | * This means we can safely use a temporary. | |
34f5a398 | 2223 | */ |
8d65af78 | 2224 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2225 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2226 | { | |
25ddbb18 AK |
2227 | struct ctl_table t; |
2228 | unsigned long tmptaint = get_taint(); | |
2229 | int err; | |
34f5a398 | 2230 | |
91fcd412 | 2231 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2232 | return -EPERM; |
2233 | ||
25ddbb18 AK |
2234 | t = *table; |
2235 | t.data = &tmptaint; | |
8d65af78 | 2236 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2237 | if (err < 0) |
2238 | return err; | |
2239 | ||
2240 | if (write) { | |
2241 | /* | |
2242 | * Poor man's atomic or. Not worth adding a primitive | |
2243 | * to everyone's atomic.h for this | |
2244 | */ | |
2245 | int i; | |
2246 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2247 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2248 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2249 | } |
2250 | } | |
2251 | ||
2252 | return err; | |
34f5a398 TT |
2253 | } |
2254 | ||
bfdc0b49 | 2255 | #ifdef CONFIG_PRINTK |
620f6e8e | 2256 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2257 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2258 | { | |
2259 | if (write && !capable(CAP_SYS_ADMIN)) | |
2260 | return -EPERM; | |
2261 | ||
2262 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2263 | } | |
2264 | #endif | |
2265 | ||
1da177e4 LT |
2266 | struct do_proc_dointvec_minmax_conv_param { |
2267 | int *min; | |
2268 | int *max; | |
2269 | }; | |
2270 | ||
00b7c339 AW |
2271 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2272 | int *valp, | |
1da177e4 LT |
2273 | int write, void *data) |
2274 | { | |
2275 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2276 | if (write) { | |
2277 | int val = *negp ? -*lvalp : *lvalp; | |
2278 | if ((param->min && *param->min > val) || | |
2279 | (param->max && *param->max < val)) | |
2280 | return -EINVAL; | |
2281 | *valp = val; | |
2282 | } else { | |
2283 | int val = *valp; | |
2284 | if (val < 0) { | |
00b7c339 | 2285 | *negp = true; |
9a5bc726 | 2286 | *lvalp = -(unsigned long)val; |
1da177e4 | 2287 | } else { |
00b7c339 | 2288 | *negp = false; |
1da177e4 LT |
2289 | *lvalp = (unsigned long)val; |
2290 | } | |
2291 | } | |
2292 | return 0; | |
2293 | } | |
2294 | ||
2295 | /** | |
2296 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2297 | * @table: the sysctl table | |
2298 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2299 | * @buffer: the user buffer |
2300 | * @lenp: the size of the user buffer | |
2301 | * @ppos: file position | |
2302 | * | |
2303 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2304 | * values from/to the user buffer, treated as an ASCII string. | |
2305 | * | |
2306 | * This routine will ensure the values are within the range specified by | |
2307 | * table->extra1 (min) and table->extra2 (max). | |
2308 | * | |
2309 | * Returns 0 on success. | |
2310 | */ | |
8d65af78 | 2311 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2312 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2313 | { | |
2314 | struct do_proc_dointvec_minmax_conv_param param = { | |
2315 | .min = (int *) table->extra1, | |
2316 | .max = (int *) table->extra2, | |
2317 | }; | |
8d65af78 | 2318 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2319 | do_proc_dointvec_minmax_conv, ¶m); |
2320 | } | |
2321 | ||
54b50199 KC |
2322 | static void validate_coredump_safety(void) |
2323 | { | |
046d662f | 2324 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2325 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 KC |
2326 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
2327 | printk(KERN_WARNING "Unsafe core_pattern used with "\ | |
2328 | "suid_dumpable=2. Pipe handler or fully qualified "\ | |
2329 | "core dump path required.\n"); | |
2330 | } | |
046d662f | 2331 | #endif |
54b50199 KC |
2332 | } |
2333 | ||
2334 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2335 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2336 | { | |
2337 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2338 | if (!error) | |
2339 | validate_coredump_safety(); | |
2340 | return error; | |
2341 | } | |
2342 | ||
046d662f | 2343 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2344 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2345 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2346 | { | |
2347 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2348 | if (!error) | |
2349 | validate_coredump_safety(); | |
2350 | return error; | |
2351 | } | |
046d662f | 2352 | #endif |
54b50199 | 2353 | |
d8217f07 | 2354 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2355 | void __user *buffer, |
2356 | size_t *lenp, loff_t *ppos, | |
2357 | unsigned long convmul, | |
2358 | unsigned long convdiv) | |
2359 | { | |
00b7c339 AW |
2360 | unsigned long *i, *min, *max; |
2361 | int vleft, first = 1, err = 0; | |
00b7c339 | 2362 | size_t left; |
70f6cbb6 | 2363 | char *kbuf = NULL, *p; |
00b7c339 AW |
2364 | |
2365 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2366 | *lenp = 0; |
2367 | return 0; | |
2368 | } | |
00b7c339 | 2369 | |
fcfbd547 | 2370 | i = (unsigned long *) data; |
1da177e4 LT |
2371 | min = (unsigned long *) table->extra1; |
2372 | max = (unsigned long *) table->extra2; | |
2373 | vleft = table->maxlen / sizeof(unsigned long); | |
2374 | left = *lenp; | |
00b7c339 AW |
2375 | |
2376 | if (write) { | |
f4aacea2 KC |
2377 | if (*ppos) { |
2378 | switch (sysctl_writes_strict) { | |
2379 | case SYSCTL_WRITES_STRICT: | |
2380 | goto out; | |
2381 | case SYSCTL_WRITES_WARN: | |
2382 | warn_sysctl_write(table); | |
2383 | break; | |
2384 | default: | |
2385 | break; | |
2386 | } | |
2387 | } | |
2388 | ||
00b7c339 AW |
2389 | if (left > PAGE_SIZE - 1) |
2390 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2391 | p = kbuf = memdup_user_nul(buffer, left); |
2392 | if (IS_ERR(kbuf)) | |
2393 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2394 | } |
2395 | ||
27b3d80a | 2396 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2397 | unsigned long val; |
2398 | ||
1da177e4 | 2399 | if (write) { |
00b7c339 AW |
2400 | bool neg; |
2401 | ||
70f6cbb6 | 2402 | left -= proc_skip_spaces(&p); |
00b7c339 | 2403 | |
70f6cbb6 | 2404 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2405 | proc_wspace_sep, |
2406 | sizeof(proc_wspace_sep), NULL); | |
2407 | if (err) | |
1da177e4 LT |
2408 | break; |
2409 | if (neg) | |
1da177e4 LT |
2410 | continue; |
2411 | if ((min && val < *min) || (max && val > *max)) | |
2412 | continue; | |
2413 | *i = val; | |
2414 | } else { | |
00b7c339 | 2415 | val = convdiv * (*i) / convmul; |
7833819d | 2416 | if (!first) { |
00b7c339 | 2417 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2418 | if (err) |
2419 | break; | |
2420 | } | |
00b7c339 AW |
2421 | err = proc_put_long(&buffer, &left, val, false); |
2422 | if (err) | |
2423 | break; | |
1da177e4 LT |
2424 | } |
2425 | } | |
2426 | ||
00b7c339 AW |
2427 | if (!write && !first && left && !err) |
2428 | err = proc_put_char(&buffer, &left, '\n'); | |
2429 | if (write && !err) | |
70f6cbb6 | 2430 | left -= proc_skip_spaces(&p); |
1da177e4 | 2431 | if (write) { |
70f6cbb6 | 2432 | kfree(kbuf); |
00b7c339 AW |
2433 | if (first) |
2434 | return err ? : -EINVAL; | |
1da177e4 | 2435 | } |
1da177e4 | 2436 | *lenp -= left; |
f4aacea2 | 2437 | out: |
1da177e4 | 2438 | *ppos += *lenp; |
00b7c339 | 2439 | return err; |
1da177e4 LT |
2440 | } |
2441 | ||
d8217f07 | 2442 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2443 | void __user *buffer, |
2444 | size_t *lenp, loff_t *ppos, | |
2445 | unsigned long convmul, | |
2446 | unsigned long convdiv) | |
2447 | { | |
2448 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2449 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2450 | } |
2451 | ||
1da177e4 LT |
2452 | /** |
2453 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2454 | * @table: the sysctl table | |
2455 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2456 | * @buffer: the user buffer |
2457 | * @lenp: the size of the user buffer | |
2458 | * @ppos: file position | |
2459 | * | |
2460 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2461 | * values from/to the user buffer, treated as an ASCII string. | |
2462 | * | |
2463 | * This routine will ensure the values are within the range specified by | |
2464 | * table->extra1 (min) and table->extra2 (max). | |
2465 | * | |
2466 | * Returns 0 on success. | |
2467 | */ | |
8d65af78 | 2468 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2469 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2470 | { | |
8d65af78 | 2471 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2472 | } |
2473 | ||
2474 | /** | |
2475 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2476 | * @table: the sysctl table | |
2477 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2478 | * @buffer: the user buffer |
2479 | * @lenp: the size of the user buffer | |
2480 | * @ppos: file position | |
2481 | * | |
2482 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2483 | * values from/to the user buffer, treated as an ASCII string. The values | |
2484 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2485 | * | |
2486 | * This routine will ensure the values are within the range specified by | |
2487 | * table->extra1 (min) and table->extra2 (max). | |
2488 | * | |
2489 | * Returns 0 on success. | |
2490 | */ | |
d8217f07 | 2491 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2492 | void __user *buffer, |
2493 | size_t *lenp, loff_t *ppos) | |
2494 | { | |
8d65af78 | 2495 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2496 | lenp, ppos, HZ, 1000l); |
2497 | } | |
2498 | ||
2499 | ||
00b7c339 | 2500 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2501 | int *valp, |
2502 | int write, void *data) | |
2503 | { | |
2504 | if (write) { | |
cba9f33d BS |
2505 | if (*lvalp > LONG_MAX / HZ) |
2506 | return 1; | |
1da177e4 LT |
2507 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2508 | } else { | |
2509 | int val = *valp; | |
2510 | unsigned long lval; | |
2511 | if (val < 0) { | |
00b7c339 | 2512 | *negp = true; |
9a5bc726 | 2513 | lval = -(unsigned long)val; |
1da177e4 | 2514 | } else { |
00b7c339 | 2515 | *negp = false; |
1da177e4 LT |
2516 | lval = (unsigned long)val; |
2517 | } | |
2518 | *lvalp = lval / HZ; | |
2519 | } | |
2520 | return 0; | |
2521 | } | |
2522 | ||
00b7c339 | 2523 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2524 | int *valp, |
2525 | int write, void *data) | |
2526 | { | |
2527 | if (write) { | |
cba9f33d BS |
2528 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2529 | return 1; | |
1da177e4 LT |
2530 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2531 | } else { | |
2532 | int val = *valp; | |
2533 | unsigned long lval; | |
2534 | if (val < 0) { | |
00b7c339 | 2535 | *negp = true; |
9a5bc726 | 2536 | lval = -(unsigned long)val; |
1da177e4 | 2537 | } else { |
00b7c339 | 2538 | *negp = false; |
1da177e4 LT |
2539 | lval = (unsigned long)val; |
2540 | } | |
2541 | *lvalp = jiffies_to_clock_t(lval); | |
2542 | } | |
2543 | return 0; | |
2544 | } | |
2545 | ||
00b7c339 | 2546 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2547 | int *valp, |
2548 | int write, void *data) | |
2549 | { | |
2550 | if (write) { | |
d738ce8f FF |
2551 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2552 | ||
2553 | if (jif > INT_MAX) | |
2554 | return 1; | |
2555 | *valp = (int)jif; | |
1da177e4 LT |
2556 | } else { |
2557 | int val = *valp; | |
2558 | unsigned long lval; | |
2559 | if (val < 0) { | |
00b7c339 | 2560 | *negp = true; |
9a5bc726 | 2561 | lval = -(unsigned long)val; |
1da177e4 | 2562 | } else { |
00b7c339 | 2563 | *negp = false; |
1da177e4 LT |
2564 | lval = (unsigned long)val; |
2565 | } | |
2566 | *lvalp = jiffies_to_msecs(lval); | |
2567 | } | |
2568 | return 0; | |
2569 | } | |
2570 | ||
2571 | /** | |
2572 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2573 | * @table: the sysctl table | |
2574 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2575 | * @buffer: the user buffer |
2576 | * @lenp: the size of the user buffer | |
2577 | * @ppos: file position | |
2578 | * | |
2579 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2580 | * values from/to the user buffer, treated as an ASCII string. | |
2581 | * The values read are assumed to be in seconds, and are converted into | |
2582 | * jiffies. | |
2583 | * | |
2584 | * Returns 0 on success. | |
2585 | */ | |
8d65af78 | 2586 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2587 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2588 | { | |
8d65af78 | 2589 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2590 | do_proc_dointvec_jiffies_conv,NULL); |
2591 | } | |
2592 | ||
2593 | /** | |
2594 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2595 | * @table: the sysctl table | |
2596 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2597 | * @buffer: the user buffer |
2598 | * @lenp: the size of the user buffer | |
1e5d5331 | 2599 | * @ppos: pointer to the file position |
1da177e4 LT |
2600 | * |
2601 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2602 | * values from/to the user buffer, treated as an ASCII string. | |
2603 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2604 | * are converted into jiffies. | |
2605 | * | |
2606 | * Returns 0 on success. | |
2607 | */ | |
8d65af78 | 2608 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2609 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2610 | { | |
8d65af78 | 2611 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2612 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2613 | } | |
2614 | ||
2615 | /** | |
2616 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2617 | * @table: the sysctl table | |
2618 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2619 | * @buffer: the user buffer |
2620 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2621 | * @ppos: file position |
2622 | * @ppos: the current position in the file | |
1da177e4 LT |
2623 | * |
2624 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2625 | * values from/to the user buffer, treated as an ASCII string. | |
2626 | * The values read are assumed to be in 1/1000 seconds, and | |
2627 | * are converted into jiffies. | |
2628 | * | |
2629 | * Returns 0 on success. | |
2630 | */ | |
8d65af78 | 2631 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2632 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2633 | { | |
8d65af78 | 2634 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2635 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2636 | } | |
2637 | ||
8d65af78 | 2638 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2639 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2640 | { | |
2641 | struct pid *new_pid; | |
2642 | pid_t tmp; | |
2643 | int r; | |
2644 | ||
6c5f3e7b | 2645 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2646 | |
8d65af78 | 2647 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2648 | lenp, ppos, NULL, NULL); |
2649 | if (r || !write) | |
2650 | return r; | |
2651 | ||
2652 | new_pid = find_get_pid(tmp); | |
2653 | if (!new_pid) | |
2654 | return -ESRCH; | |
2655 | ||
2656 | put_pid(xchg(&cad_pid, new_pid)); | |
2657 | return 0; | |
2658 | } | |
2659 | ||
9f977fb7 OP |
2660 | /** |
2661 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2662 | * @table: the sysctl table | |
2663 | * @write: %TRUE if this is a write to the sysctl file | |
2664 | * @buffer: the user buffer | |
2665 | * @lenp: the size of the user buffer | |
2666 | * @ppos: file position | |
2667 | * | |
2668 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2669 | * in table->maxlen. | |
2670 | * | |
2671 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2672 | * large bitmaps may be represented in a compact manner. Writing into | |
2673 | * the file will clear the bitmap then update it with the given input. | |
2674 | * | |
2675 | * Returns 0 on success. | |
2676 | */ | |
2677 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2678 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2679 | { | |
2680 | int err = 0; | |
2681 | bool first = 1; | |
2682 | size_t left = *lenp; | |
2683 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 2684 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
2685 | unsigned long *tmp_bitmap = NULL; |
2686 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2687 | ||
122ff243 | 2688 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
2689 | *lenp = 0; |
2690 | return 0; | |
2691 | } | |
2692 | ||
2693 | if (write) { | |
70f6cbb6 | 2694 | char *kbuf, *p; |
9f977fb7 OP |
2695 | |
2696 | if (left > PAGE_SIZE - 1) | |
2697 | left = PAGE_SIZE - 1; | |
2698 | ||
70f6cbb6 AV |
2699 | p = kbuf = memdup_user_nul(buffer, left); |
2700 | if (IS_ERR(kbuf)) | |
2701 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
2702 | |
2703 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2704 | GFP_KERNEL); | |
2705 | if (!tmp_bitmap) { | |
70f6cbb6 | 2706 | kfree(kbuf); |
9f977fb7 OP |
2707 | return -ENOMEM; |
2708 | } | |
70f6cbb6 | 2709 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
2710 | while (!err && left) { |
2711 | unsigned long val_a, val_b; | |
2712 | bool neg; | |
2713 | ||
70f6cbb6 | 2714 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
2715 | sizeof(tr_a), &c); |
2716 | if (err) | |
2717 | break; | |
2718 | if (val_a >= bitmap_len || neg) { | |
2719 | err = -EINVAL; | |
2720 | break; | |
2721 | } | |
2722 | ||
2723 | val_b = val_a; | |
2724 | if (left) { | |
70f6cbb6 | 2725 | p++; |
9f977fb7 OP |
2726 | left--; |
2727 | } | |
2728 | ||
2729 | if (c == '-') { | |
70f6cbb6 | 2730 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
2731 | &neg, tr_b, sizeof(tr_b), |
2732 | &c); | |
2733 | if (err) | |
2734 | break; | |
2735 | if (val_b >= bitmap_len || neg || | |
2736 | val_a > val_b) { | |
2737 | err = -EINVAL; | |
2738 | break; | |
2739 | } | |
2740 | if (left) { | |
70f6cbb6 | 2741 | p++; |
9f977fb7 OP |
2742 | left--; |
2743 | } | |
2744 | } | |
2745 | ||
5a04cca6 | 2746 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 2747 | first = 0; |
70f6cbb6 | 2748 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 2749 | } |
70f6cbb6 | 2750 | kfree(kbuf); |
9f977fb7 OP |
2751 | } else { |
2752 | unsigned long bit_a, bit_b = 0; | |
2753 | ||
2754 | while (left) { | |
2755 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2756 | if (bit_a >= bitmap_len) | |
2757 | break; | |
2758 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2759 | bit_a + 1) - 1; | |
2760 | ||
2761 | if (!first) { | |
2762 | err = proc_put_char(&buffer, &left, ','); | |
2763 | if (err) | |
2764 | break; | |
2765 | } | |
2766 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2767 | if (err) | |
2768 | break; | |
2769 | if (bit_a != bit_b) { | |
2770 | err = proc_put_char(&buffer, &left, '-'); | |
2771 | if (err) | |
2772 | break; | |
2773 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2774 | if (err) | |
2775 | break; | |
2776 | } | |
2777 | ||
2778 | first = 0; bit_b++; | |
2779 | } | |
2780 | if (!err) | |
2781 | err = proc_put_char(&buffer, &left, '\n'); | |
2782 | } | |
2783 | ||
2784 | if (!err) { | |
2785 | if (write) { | |
2786 | if (*ppos) | |
2787 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2788 | else | |
5a04cca6 | 2789 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2790 | } |
2791 | kfree(tmp_bitmap); | |
2792 | *lenp -= left; | |
2793 | *ppos += *lenp; | |
2794 | return 0; | |
2795 | } else { | |
2796 | kfree(tmp_bitmap); | |
2797 | return err; | |
2798 | } | |
2799 | } | |
2800 | ||
55610500 | 2801 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2802 | |
8d65af78 | 2803 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2804 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2805 | { | |
2806 | return -ENOSYS; | |
2807 | } | |
2808 | ||
8d65af78 | 2809 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2810 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2811 | { |
2812 | return -ENOSYS; | |
2813 | } | |
2814 | ||
8d65af78 | 2815 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2816 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2817 | { | |
2818 | return -ENOSYS; | |
2819 | } | |
2820 | ||
8d65af78 | 2821 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2822 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2823 | { | |
2824 | return -ENOSYS; | |
2825 | } | |
2826 | ||
8d65af78 | 2827 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2828 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2829 | { | |
2830 | return -ENOSYS; | |
2831 | } | |
2832 | ||
8d65af78 | 2833 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2834 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2835 | { | |
2836 | return -ENOSYS; | |
2837 | } | |
2838 | ||
8d65af78 | 2839 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2840 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2841 | { | |
2842 | return -ENOSYS; | |
2843 | } | |
2844 | ||
d8217f07 | 2845 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2846 | void __user *buffer, |
2847 | size_t *lenp, loff_t *ppos) | |
2848 | { | |
2849 | return -ENOSYS; | |
2850 | } | |
2851 | ||
2852 | ||
55610500 | 2853 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2854 | |
1da177e4 LT |
2855 | /* |
2856 | * No sense putting this after each symbol definition, twice, | |
2857 | * exception granted :-) | |
2858 | */ | |
2859 | EXPORT_SYMBOL(proc_dointvec); | |
2860 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2861 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2862 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2863 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2864 | EXPORT_SYMBOL(proc_dostring); | |
2865 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2866 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |