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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; |
af91322e DY |
129 | #ifdef CONFIG_PRINTK |
130 | static int ten_thousand = 10000; | |
131 | #endif | |
c4f3b63f | 132 | |
9e4a5bda AR |
133 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
134 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
135 | ||
1da177e4 LT |
136 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
137 | static int maxolduid = 65535; | |
138 | static int minolduid; | |
139 | ||
140 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 141 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 142 | |
80df2847 LH |
143 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
144 | #ifdef CONFIG_DETECT_HUNG_TASK | |
145 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
146 | #endif | |
147 | ||
d14f1729 DY |
148 | #ifdef CONFIG_INOTIFY_USER |
149 | #include <linux/inotify.h> | |
150 | #endif | |
72c57ed5 | 151 | #ifdef CONFIG_SPARC |
1da177e4 LT |
152 | #endif |
153 | ||
154 | #ifdef __hppa__ | |
155 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
156 | #endif |
157 | ||
158 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
159 | extern int unaligned_enabled; |
160 | #endif | |
1da177e4 | 161 | |
d2b176ed | 162 | #ifdef CONFIG_IA64 |
88fc241f | 163 | extern int unaligned_dump_stack; |
d2b176ed JS |
164 | #endif |
165 | ||
b6fca725 VG |
166 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
167 | extern int no_unaligned_warning; | |
168 | #endif | |
169 | ||
d6f8ff73 | 170 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 KC |
171 | |
172 | #define SYSCTL_WRITES_LEGACY -1 | |
173 | #define SYSCTL_WRITES_WARN 0 | |
174 | #define SYSCTL_WRITES_STRICT 1 | |
175 | ||
41662f5c | 176 | static int sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 177 | |
8d65af78 | 178 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 179 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 180 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 181 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 182 | #endif |
9ec52099 | 183 | |
bfdc0b49 | 184 | #ifdef CONFIG_PRINTK |
620f6e8e | 185 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
186 | void __user *buffer, size_t *lenp, loff_t *ppos); |
187 | #endif | |
188 | ||
54b50199 KC |
189 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
190 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 191 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
192 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
193 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 194 | #endif |
54b50199 | 195 | |
97f5f0cd | 196 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 197 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 198 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 199 | |
6f8fd1d7 | 200 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
201 | void __user *buffer, size_t *lenp, |
202 | loff_t *ppos) | |
203 | { | |
204 | int error; | |
205 | ||
206 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
207 | if (error) | |
208 | return error; | |
209 | ||
210 | if (write) | |
211 | sysrq_toggle_support(__sysrq_enabled); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | #endif | |
217 | ||
d8217f07 EB |
218 | static struct ctl_table kern_table[]; |
219 | static struct ctl_table vm_table[]; | |
220 | static struct ctl_table fs_table[]; | |
221 | static struct ctl_table debug_table[]; | |
222 | static struct ctl_table dev_table[]; | |
223 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
224 | #ifdef CONFIG_EPOLL |
225 | extern struct ctl_table epoll_table[]; | |
226 | #endif | |
1da177e4 LT |
227 | |
228 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
229 | int sysctl_legacy_va_layout; | |
230 | #endif | |
231 | ||
1da177e4 LT |
232 | /* The default sysctl tables: */ |
233 | ||
de4e83bd | 234 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 235 | { |
1da177e4 LT |
236 | .procname = "kernel", |
237 | .mode = 0555, | |
238 | .child = kern_table, | |
239 | }, | |
240 | { | |
1da177e4 LT |
241 | .procname = "vm", |
242 | .mode = 0555, | |
243 | .child = vm_table, | |
244 | }, | |
1da177e4 | 245 | { |
1da177e4 LT |
246 | .procname = "fs", |
247 | .mode = 0555, | |
248 | .child = fs_table, | |
249 | }, | |
250 | { | |
1da177e4 LT |
251 | .procname = "debug", |
252 | .mode = 0555, | |
253 | .child = debug_table, | |
254 | }, | |
255 | { | |
1da177e4 LT |
256 | .procname = "dev", |
257 | .mode = 0555, | |
258 | .child = dev_table, | |
259 | }, | |
6fce56ec | 260 | { } |
1da177e4 LT |
261 | }; |
262 | ||
77e54a1f | 263 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
264 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
265 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
266 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
267 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 268 | #ifdef CONFIG_SMP |
1983a922 CE |
269 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
270 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
271 | #endif /* CONFIG_SMP */ |
272 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 273 | |
5e771905 MG |
274 | #ifdef CONFIG_COMPACTION |
275 | static int min_extfrag_threshold; | |
276 | static int max_extfrag_threshold = 1000; | |
277 | #endif | |
278 | ||
d8217f07 | 279 | static struct ctl_table kern_table[] = { |
2bba22c5 | 280 | { |
2bba22c5 MG |
281 | .procname = "sched_child_runs_first", |
282 | .data = &sysctl_sched_child_runs_first, | |
283 | .maxlen = sizeof(unsigned int), | |
284 | .mode = 0644, | |
6d456111 | 285 | .proc_handler = proc_dointvec, |
2bba22c5 | 286 | }, |
77e54a1f IM |
287 | #ifdef CONFIG_SCHED_DEBUG |
288 | { | |
b2be5e96 PZ |
289 | .procname = "sched_min_granularity_ns", |
290 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
291 | .maxlen = sizeof(unsigned int), |
292 | .mode = 0644, | |
702a7c76 | 293 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
294 | .extra1 = &min_sched_granularity_ns, |
295 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 296 | }, |
21805085 | 297 | { |
21805085 PZ |
298 | .procname = "sched_latency_ns", |
299 | .data = &sysctl_sched_latency, | |
300 | .maxlen = sizeof(unsigned int), | |
301 | .mode = 0644, | |
702a7c76 | 302 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
303 | .extra1 = &min_sched_granularity_ns, |
304 | .extra2 = &max_sched_granularity_ns, | |
305 | }, | |
77e54a1f | 306 | { |
77e54a1f IM |
307 | .procname = "sched_wakeup_granularity_ns", |
308 | .data = &sysctl_sched_wakeup_granularity, | |
309 | .maxlen = sizeof(unsigned int), | |
310 | .mode = 0644, | |
702a7c76 | 311 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
312 | .extra1 = &min_wakeup_granularity_ns, |
313 | .extra2 = &max_wakeup_granularity_ns, | |
314 | }, | |
cbee9f88 | 315 | #ifdef CONFIG_SMP |
1983a922 | 316 | { |
1983a922 CE |
317 | .procname = "sched_tunable_scaling", |
318 | .data = &sysctl_sched_tunable_scaling, | |
319 | .maxlen = sizeof(enum sched_tunable_scaling), | |
320 | .mode = 0644, | |
702a7c76 | 321 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
322 | .extra1 = &min_sched_tunable_scaling, |
323 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 324 | }, |
da84d961 | 325 | { |
d00535db | 326 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
327 | .data = &sysctl_sched_migration_cost, |
328 | .maxlen = sizeof(unsigned int), | |
329 | .mode = 0644, | |
6d456111 | 330 | .proc_handler = proc_dointvec, |
da84d961 | 331 | }, |
b82d9fdd | 332 | { |
b82d9fdd PZ |
333 | .procname = "sched_nr_migrate", |
334 | .data = &sysctl_sched_nr_migrate, | |
335 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 336 | .mode = 0644, |
6d456111 | 337 | .proc_handler = proc_dointvec, |
fa85ae24 | 338 | }, |
e9e9250b | 339 | { |
d00535db | 340 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
341 | .data = &sysctl_sched_time_avg, |
342 | .maxlen = sizeof(unsigned int), | |
343 | .mode = 0644, | |
6d456111 | 344 | .proc_handler = proc_dointvec, |
e9e9250b | 345 | }, |
a7a4f8a7 | 346 | { |
d00535db | 347 | .procname = "sched_shares_window_ns", |
a7a4f8a7 PT |
348 | .data = &sysctl_sched_shares_window, |
349 | .maxlen = sizeof(unsigned int), | |
350 | .mode = 0644, | |
351 | .proc_handler = proc_dointvec, | |
352 | }, | |
cb251765 MG |
353 | #ifdef CONFIG_SCHEDSTATS |
354 | { | |
355 | .procname = "sched_schedstats", | |
356 | .data = NULL, | |
357 | .maxlen = sizeof(unsigned int), | |
358 | .mode = 0644, | |
359 | .proc_handler = sysctl_schedstats, | |
360 | .extra1 = &zero, | |
361 | .extra2 = &one, | |
362 | }, | |
363 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
364 | #endif /* CONFIG_SMP */ |
365 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
366 | { |
367 | .procname = "numa_balancing_scan_delay_ms", | |
368 | .data = &sysctl_numa_balancing_scan_delay, | |
369 | .maxlen = sizeof(unsigned int), | |
370 | .mode = 0644, | |
371 | .proc_handler = proc_dointvec, | |
372 | }, | |
cbee9f88 PZ |
373 | { |
374 | .procname = "numa_balancing_scan_period_min_ms", | |
375 | .data = &sysctl_numa_balancing_scan_period_min, | |
376 | .maxlen = sizeof(unsigned int), | |
377 | .mode = 0644, | |
378 | .proc_handler = proc_dointvec, | |
379 | }, | |
380 | { | |
381 | .procname = "numa_balancing_scan_period_max_ms", | |
382 | .data = &sysctl_numa_balancing_scan_period_max, | |
383 | .maxlen = sizeof(unsigned int), | |
384 | .mode = 0644, | |
385 | .proc_handler = proc_dointvec, | |
386 | }, | |
6e5fb223 PZ |
387 | { |
388 | .procname = "numa_balancing_scan_size_mb", | |
389 | .data = &sysctl_numa_balancing_scan_size, | |
390 | .maxlen = sizeof(unsigned int), | |
391 | .mode = 0644, | |
64192658 KT |
392 | .proc_handler = proc_dointvec_minmax, |
393 | .extra1 = &one, | |
6e5fb223 | 394 | }, |
54a43d54 AK |
395 | { |
396 | .procname = "numa_balancing", | |
397 | .data = NULL, /* filled in by handler */ | |
398 | .maxlen = sizeof(unsigned int), | |
399 | .mode = 0644, | |
400 | .proc_handler = sysctl_numa_balancing, | |
401 | .extra1 = &zero, | |
402 | .extra2 = &one, | |
403 | }, | |
cbee9f88 PZ |
404 | #endif /* CONFIG_NUMA_BALANCING */ |
405 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 406 | { |
9f0c1e56 PZ |
407 | .procname = "sched_rt_period_us", |
408 | .data = &sysctl_sched_rt_period, | |
409 | .maxlen = sizeof(unsigned int), | |
410 | .mode = 0644, | |
6d456111 | 411 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
412 | }, |
413 | { | |
9f0c1e56 PZ |
414 | .procname = "sched_rt_runtime_us", |
415 | .data = &sysctl_sched_rt_runtime, | |
416 | .maxlen = sizeof(int), | |
417 | .mode = 0644, | |
6d456111 | 418 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 419 | }, |
ce0dbbbb CW |
420 | { |
421 | .procname = "sched_rr_timeslice_ms", | |
422 | .data = &sched_rr_timeslice, | |
423 | .maxlen = sizeof(int), | |
424 | .mode = 0644, | |
425 | .proc_handler = sched_rr_handler, | |
426 | }, | |
5091faa4 MG |
427 | #ifdef CONFIG_SCHED_AUTOGROUP |
428 | { | |
429 | .procname = "sched_autogroup_enabled", | |
430 | .data = &sysctl_sched_autogroup_enabled, | |
431 | .maxlen = sizeof(unsigned int), | |
432 | .mode = 0644, | |
1747b21f | 433 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
434 | .extra1 = &zero, |
435 | .extra2 = &one, | |
436 | }, | |
437 | #endif | |
ec12cb7f PT |
438 | #ifdef CONFIG_CFS_BANDWIDTH |
439 | { | |
440 | .procname = "sched_cfs_bandwidth_slice_us", | |
441 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
442 | .maxlen = sizeof(unsigned int), | |
443 | .mode = 0644, | |
444 | .proc_handler = proc_dointvec_minmax, | |
445 | .extra1 = &one, | |
446 | }, | |
447 | #endif | |
f20786ff PZ |
448 | #ifdef CONFIG_PROVE_LOCKING |
449 | { | |
f20786ff PZ |
450 | .procname = "prove_locking", |
451 | .data = &prove_locking, | |
452 | .maxlen = sizeof(int), | |
453 | .mode = 0644, | |
6d456111 | 454 | .proc_handler = proc_dointvec, |
f20786ff PZ |
455 | }, |
456 | #endif | |
457 | #ifdef CONFIG_LOCK_STAT | |
458 | { | |
f20786ff PZ |
459 | .procname = "lock_stat", |
460 | .data = &lock_stat, | |
461 | .maxlen = sizeof(int), | |
462 | .mode = 0644, | |
6d456111 | 463 | .proc_handler = proc_dointvec, |
f20786ff | 464 | }, |
77e54a1f | 465 | #endif |
1da177e4 | 466 | { |
1da177e4 LT |
467 | .procname = "panic", |
468 | .data = &panic_timeout, | |
469 | .maxlen = sizeof(int), | |
470 | .mode = 0644, | |
6d456111 | 471 | .proc_handler = proc_dointvec, |
1da177e4 | 472 | }, |
046d662f | 473 | #ifdef CONFIG_COREDUMP |
1da177e4 | 474 | { |
1da177e4 LT |
475 | .procname = "core_uses_pid", |
476 | .data = &core_uses_pid, | |
477 | .maxlen = sizeof(int), | |
478 | .mode = 0644, | |
6d456111 | 479 | .proc_handler = proc_dointvec, |
1da177e4 LT |
480 | }, |
481 | { | |
1da177e4 LT |
482 | .procname = "core_pattern", |
483 | .data = core_pattern, | |
71ce92f3 | 484 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 485 | .mode = 0644, |
54b50199 | 486 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 487 | }, |
a293980c | 488 | { |
a293980c NH |
489 | .procname = "core_pipe_limit", |
490 | .data = &core_pipe_limit, | |
491 | .maxlen = sizeof(unsigned int), | |
492 | .mode = 0644, | |
6d456111 | 493 | .proc_handler = proc_dointvec, |
a293980c | 494 | }, |
046d662f | 495 | #endif |
34f5a398 | 496 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 497 | { |
1da177e4 | 498 | .procname = "tainted", |
25ddbb18 | 499 | .maxlen = sizeof(long), |
34f5a398 | 500 | .mode = 0644, |
6d456111 | 501 | .proc_handler = proc_taint, |
1da177e4 | 502 | }, |
f4aacea2 KC |
503 | { |
504 | .procname = "sysctl_writes_strict", | |
505 | .data = &sysctl_writes_strict, | |
506 | .maxlen = sizeof(int), | |
507 | .mode = 0644, | |
508 | .proc_handler = proc_dointvec_minmax, | |
509 | .extra1 = &neg_one, | |
510 | .extra2 = &one, | |
511 | }, | |
34f5a398 | 512 | #endif |
9745512c AV |
513 | #ifdef CONFIG_LATENCYTOP |
514 | { | |
515 | .procname = "latencytop", | |
516 | .data = &latencytop_enabled, | |
517 | .maxlen = sizeof(int), | |
518 | .mode = 0644, | |
cb251765 | 519 | .proc_handler = sysctl_latencytop, |
9745512c AV |
520 | }, |
521 | #endif | |
1da177e4 LT |
522 | #ifdef CONFIG_BLK_DEV_INITRD |
523 | { | |
1da177e4 LT |
524 | .procname = "real-root-dev", |
525 | .data = &real_root_dev, | |
526 | .maxlen = sizeof(int), | |
527 | .mode = 0644, | |
6d456111 | 528 | .proc_handler = proc_dointvec, |
1da177e4 LT |
529 | }, |
530 | #endif | |
45807a1d | 531 | { |
45807a1d IM |
532 | .procname = "print-fatal-signals", |
533 | .data = &print_fatal_signals, | |
534 | .maxlen = sizeof(int), | |
535 | .mode = 0644, | |
6d456111 | 536 | .proc_handler = proc_dointvec, |
45807a1d | 537 | }, |
72c57ed5 | 538 | #ifdef CONFIG_SPARC |
1da177e4 | 539 | { |
1da177e4 LT |
540 | .procname = "reboot-cmd", |
541 | .data = reboot_command, | |
542 | .maxlen = 256, | |
543 | .mode = 0644, | |
6d456111 | 544 | .proc_handler = proc_dostring, |
1da177e4 LT |
545 | }, |
546 | { | |
1da177e4 LT |
547 | .procname = "stop-a", |
548 | .data = &stop_a_enabled, | |
549 | .maxlen = sizeof (int), | |
550 | .mode = 0644, | |
6d456111 | 551 | .proc_handler = proc_dointvec, |
1da177e4 LT |
552 | }, |
553 | { | |
1da177e4 LT |
554 | .procname = "scons-poweroff", |
555 | .data = &scons_pwroff, | |
556 | .maxlen = sizeof (int), | |
557 | .mode = 0644, | |
6d456111 | 558 | .proc_handler = proc_dointvec, |
1da177e4 LT |
559 | }, |
560 | #endif | |
0871420f DM |
561 | #ifdef CONFIG_SPARC64 |
562 | { | |
0871420f DM |
563 | .procname = "tsb-ratio", |
564 | .data = &sysctl_tsb_ratio, | |
565 | .maxlen = sizeof (int), | |
566 | .mode = 0644, | |
6d456111 | 567 | .proc_handler = proc_dointvec, |
0871420f DM |
568 | }, |
569 | #endif | |
1da177e4 LT |
570 | #ifdef __hppa__ |
571 | { | |
1da177e4 LT |
572 | .procname = "soft-power", |
573 | .data = &pwrsw_enabled, | |
574 | .maxlen = sizeof (int), | |
575 | .mode = 0644, | |
6d456111 | 576 | .proc_handler = proc_dointvec, |
1da177e4 | 577 | }, |
bf14e3b9 VG |
578 | #endif |
579 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 580 | { |
1da177e4 LT |
581 | .procname = "unaligned-trap", |
582 | .data = &unaligned_enabled, | |
583 | .maxlen = sizeof (int), | |
584 | .mode = 0644, | |
6d456111 | 585 | .proc_handler = proc_dointvec, |
1da177e4 LT |
586 | }, |
587 | #endif | |
588 | { | |
1da177e4 LT |
589 | .procname = "ctrl-alt-del", |
590 | .data = &C_A_D, | |
591 | .maxlen = sizeof(int), | |
592 | .mode = 0644, | |
6d456111 | 593 | .proc_handler = proc_dointvec, |
1da177e4 | 594 | }, |
606576ce | 595 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 596 | { |
b0fc494f SR |
597 | .procname = "ftrace_enabled", |
598 | .data = &ftrace_enabled, | |
599 | .maxlen = sizeof(int), | |
600 | .mode = 0644, | |
6d456111 | 601 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
602 | }, |
603 | #endif | |
f38f1d2a SR |
604 | #ifdef CONFIG_STACK_TRACER |
605 | { | |
f38f1d2a SR |
606 | .procname = "stack_tracer_enabled", |
607 | .data = &stack_tracer_enabled, | |
608 | .maxlen = sizeof(int), | |
609 | .mode = 0644, | |
6d456111 | 610 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
611 | }, |
612 | #endif | |
944ac425 SR |
613 | #ifdef CONFIG_TRACING |
614 | { | |
3299b4dd | 615 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
616 | .data = &ftrace_dump_on_oops, |
617 | .maxlen = sizeof(int), | |
618 | .mode = 0644, | |
6d456111 | 619 | .proc_handler = proc_dointvec, |
944ac425 | 620 | }, |
de7edd31 SRRH |
621 | { |
622 | .procname = "traceoff_on_warning", | |
623 | .data = &__disable_trace_on_warning, | |
624 | .maxlen = sizeof(__disable_trace_on_warning), | |
625 | .mode = 0644, | |
626 | .proc_handler = proc_dointvec, | |
627 | }, | |
0daa2302 SRRH |
628 | { |
629 | .procname = "tracepoint_printk", | |
630 | .data = &tracepoint_printk, | |
631 | .maxlen = sizeof(tracepoint_printk), | |
632 | .mode = 0644, | |
633 | .proc_handler = proc_dointvec, | |
634 | }, | |
944ac425 | 635 | #endif |
2965faa5 | 636 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
637 | { |
638 | .procname = "kexec_load_disabled", | |
639 | .data = &kexec_load_disabled, | |
640 | .maxlen = sizeof(int), | |
641 | .mode = 0644, | |
642 | /* only handle a transition from default "0" to "1" */ | |
643 | .proc_handler = proc_dointvec_minmax, | |
644 | .extra1 = &one, | |
645 | .extra2 = &one, | |
646 | }, | |
647 | #endif | |
a1ef5adb | 648 | #ifdef CONFIG_MODULES |
1da177e4 | 649 | { |
1da177e4 LT |
650 | .procname = "modprobe", |
651 | .data = &modprobe_path, | |
652 | .maxlen = KMOD_PATH_LEN, | |
653 | .mode = 0644, | |
6d456111 | 654 | .proc_handler = proc_dostring, |
1da177e4 | 655 | }, |
3d43321b | 656 | { |
3d43321b KC |
657 | .procname = "modules_disabled", |
658 | .data = &modules_disabled, | |
659 | .maxlen = sizeof(int), | |
660 | .mode = 0644, | |
661 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 662 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
663 | .extra1 = &one, |
664 | .extra2 = &one, | |
665 | }, | |
1da177e4 | 666 | #endif |
86d56134 | 667 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 668 | { |
1da177e4 | 669 | .procname = "hotplug", |
312c004d KS |
670 | .data = &uevent_helper, |
671 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 672 | .mode = 0644, |
6d456111 | 673 | .proc_handler = proc_dostring, |
1da177e4 | 674 | }, |
86d56134 | 675 | #endif |
1da177e4 LT |
676 | #ifdef CONFIG_CHR_DEV_SG |
677 | { | |
1da177e4 LT |
678 | .procname = "sg-big-buff", |
679 | .data = &sg_big_buff, | |
680 | .maxlen = sizeof (int), | |
681 | .mode = 0444, | |
6d456111 | 682 | .proc_handler = proc_dointvec, |
1da177e4 LT |
683 | }, |
684 | #endif | |
685 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
686 | { | |
1da177e4 LT |
687 | .procname = "acct", |
688 | .data = &acct_parm, | |
689 | .maxlen = 3*sizeof(int), | |
690 | .mode = 0644, | |
6d456111 | 691 | .proc_handler = proc_dointvec, |
1da177e4 LT |
692 | }, |
693 | #endif | |
1da177e4 LT |
694 | #ifdef CONFIG_MAGIC_SYSRQ |
695 | { | |
1da177e4 | 696 | .procname = "sysrq", |
5d6f647f | 697 | .data = &__sysrq_enabled, |
1da177e4 LT |
698 | .maxlen = sizeof (int), |
699 | .mode = 0644, | |
97f5f0cd | 700 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
701 | }, |
702 | #endif | |
d6f8ff73 | 703 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 704 | { |
1da177e4 | 705 | .procname = "cad_pid", |
9ec52099 | 706 | .data = NULL, |
1da177e4 LT |
707 | .maxlen = sizeof (int), |
708 | .mode = 0600, | |
6d456111 | 709 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 710 | }, |
d6f8ff73 | 711 | #endif |
1da177e4 | 712 | { |
1da177e4 | 713 | .procname = "threads-max", |
16db3d3f | 714 | .data = NULL, |
1da177e4 LT |
715 | .maxlen = sizeof(int), |
716 | .mode = 0644, | |
16db3d3f | 717 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
718 | }, |
719 | { | |
1da177e4 LT |
720 | .procname = "random", |
721 | .mode = 0555, | |
722 | .child = random_table, | |
723 | }, | |
17f60a7d EP |
724 | { |
725 | .procname = "usermodehelper", | |
726 | .mode = 0555, | |
727 | .child = usermodehelper_table, | |
728 | }, | |
1da177e4 | 729 | { |
1da177e4 LT |
730 | .procname = "overflowuid", |
731 | .data = &overflowuid, | |
732 | .maxlen = sizeof(int), | |
733 | .mode = 0644, | |
6d456111 | 734 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
735 | .extra1 = &minolduid, |
736 | .extra2 = &maxolduid, | |
737 | }, | |
738 | { | |
1da177e4 LT |
739 | .procname = "overflowgid", |
740 | .data = &overflowgid, | |
741 | .maxlen = sizeof(int), | |
742 | .mode = 0644, | |
6d456111 | 743 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
744 | .extra1 = &minolduid, |
745 | .extra2 = &maxolduid, | |
746 | }, | |
347a8dc3 | 747 | #ifdef CONFIG_S390 |
1da177e4 LT |
748 | #ifdef CONFIG_MATHEMU |
749 | { | |
1da177e4 LT |
750 | .procname = "ieee_emulation_warnings", |
751 | .data = &sysctl_ieee_emulation_warnings, | |
752 | .maxlen = sizeof(int), | |
753 | .mode = 0644, | |
6d456111 | 754 | .proc_handler = proc_dointvec, |
1da177e4 | 755 | }, |
1da177e4 LT |
756 | #endif |
757 | { | |
1da177e4 | 758 | .procname = "userprocess_debug", |
ab3c68ee | 759 | .data = &show_unhandled_signals, |
1da177e4 LT |
760 | .maxlen = sizeof(int), |
761 | .mode = 0644, | |
6d456111 | 762 | .proc_handler = proc_dointvec, |
1da177e4 LT |
763 | }, |
764 | #endif | |
765 | { | |
1da177e4 LT |
766 | .procname = "pid_max", |
767 | .data = &pid_max, | |
768 | .maxlen = sizeof (int), | |
769 | .mode = 0644, | |
6d456111 | 770 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
771 | .extra1 = &pid_max_min, |
772 | .extra2 = &pid_max_max, | |
773 | }, | |
774 | { | |
1da177e4 LT |
775 | .procname = "panic_on_oops", |
776 | .data = &panic_on_oops, | |
777 | .maxlen = sizeof(int), | |
778 | .mode = 0644, | |
6d456111 | 779 | .proc_handler = proc_dointvec, |
1da177e4 | 780 | }, |
7ef3d2fd JP |
781 | #if defined CONFIG_PRINTK |
782 | { | |
7ef3d2fd JP |
783 | .procname = "printk", |
784 | .data = &console_loglevel, | |
785 | .maxlen = 4*sizeof(int), | |
786 | .mode = 0644, | |
6d456111 | 787 | .proc_handler = proc_dointvec, |
7ef3d2fd | 788 | }, |
1da177e4 | 789 | { |
1da177e4 | 790 | .procname = "printk_ratelimit", |
717115e1 | 791 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
792 | .maxlen = sizeof(int), |
793 | .mode = 0644, | |
6d456111 | 794 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
795 | }, |
796 | { | |
1da177e4 | 797 | .procname = "printk_ratelimit_burst", |
717115e1 | 798 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
799 | .maxlen = sizeof(int), |
800 | .mode = 0644, | |
6d456111 | 801 | .proc_handler = proc_dointvec, |
1da177e4 | 802 | }, |
af91322e | 803 | { |
af91322e DY |
804 | .procname = "printk_delay", |
805 | .data = &printk_delay_msec, | |
806 | .maxlen = sizeof(int), | |
807 | .mode = 0644, | |
6d456111 | 808 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
809 | .extra1 = &zero, |
810 | .extra2 = &ten_thousand, | |
811 | }, | |
eaf06b24 DR |
812 | { |
813 | .procname = "dmesg_restrict", | |
814 | .data = &dmesg_restrict, | |
815 | .maxlen = sizeof(int), | |
816 | .mode = 0644, | |
620f6e8e | 817 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
818 | .extra1 = &zero, |
819 | .extra2 = &one, | |
820 | }, | |
455cd5ab DR |
821 | { |
822 | .procname = "kptr_restrict", | |
823 | .data = &kptr_restrict, | |
824 | .maxlen = sizeof(int), | |
825 | .mode = 0644, | |
620f6e8e | 826 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
827 | .extra1 = &zero, |
828 | .extra2 = &two, | |
829 | }, | |
df6e61d4 | 830 | #endif |
1da177e4 | 831 | { |
1da177e4 LT |
832 | .procname = "ngroups_max", |
833 | .data = &ngroups_max, | |
834 | .maxlen = sizeof (int), | |
835 | .mode = 0444, | |
6d456111 | 836 | .proc_handler = proc_dointvec, |
1da177e4 | 837 | }, |
73efc039 DB |
838 | { |
839 | .procname = "cap_last_cap", | |
840 | .data = (void *)&cap_last_cap, | |
841 | .maxlen = sizeof(int), | |
842 | .mode = 0444, | |
843 | .proc_handler = proc_dointvec, | |
844 | }, | |
58687acb | 845 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 846 | { |
58687acb | 847 | .procname = "watchdog", |
3c00ea82 | 848 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
849 | .maxlen = sizeof (int), |
850 | .mode = 0644, | |
195daf66 | 851 | .proc_handler = proc_watchdog, |
586692a5 MSB |
852 | .extra1 = &zero, |
853 | .extra2 = &one, | |
58687acb DZ |
854 | }, |
855 | { | |
856 | .procname = "watchdog_thresh", | |
586692a5 | 857 | .data = &watchdog_thresh, |
58687acb DZ |
858 | .maxlen = sizeof(int), |
859 | .mode = 0644, | |
195daf66 | 860 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 861 | .extra1 = &zero, |
58687acb | 862 | .extra2 = &sixty, |
504d7cf1 | 863 | }, |
195daf66 UO |
864 | { |
865 | .procname = "nmi_watchdog", | |
866 | .data = &nmi_watchdog_enabled, | |
867 | .maxlen = sizeof (int), | |
868 | .mode = 0644, | |
869 | .proc_handler = proc_nmi_watchdog, | |
870 | .extra1 = &zero, | |
871 | #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) | |
872 | .extra2 = &one, | |
873 | #else | |
874 | .extra2 = &zero, | |
875 | #endif | |
876 | }, | |
877 | { | |
878 | .procname = "soft_watchdog", | |
879 | .data = &soft_watchdog_enabled, | |
880 | .maxlen = sizeof (int), | |
881 | .mode = 0644, | |
882 | .proc_handler = proc_soft_watchdog, | |
883 | .extra1 = &zero, | |
884 | .extra2 = &one, | |
885 | }, | |
fe4ba3c3 CM |
886 | { |
887 | .procname = "watchdog_cpumask", | |
888 | .data = &watchdog_cpumask_bits, | |
889 | .maxlen = NR_CPUS, | |
890 | .mode = 0644, | |
891 | .proc_handler = proc_watchdog_cpumask, | |
892 | }, | |
2508ce18 DZ |
893 | { |
894 | .procname = "softlockup_panic", | |
895 | .data = &softlockup_panic, | |
896 | .maxlen = sizeof(int), | |
897 | .mode = 0644, | |
898 | .proc_handler = proc_dointvec_minmax, | |
899 | .extra1 = &zero, | |
900 | .extra2 = &one, | |
901 | }, | |
ac1f5912 DZ |
902 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
903 | { | |
904 | .procname = "hardlockup_panic", | |
905 | .data = &hardlockup_panic, | |
906 | .maxlen = sizeof(int), | |
907 | .mode = 0644, | |
908 | .proc_handler = proc_dointvec_minmax, | |
909 | .extra1 = &zero, | |
910 | .extra2 = &one, | |
911 | }, | |
912 | #endif | |
ed235875 AT |
913 | #ifdef CONFIG_SMP |
914 | { | |
915 | .procname = "softlockup_all_cpu_backtrace", | |
916 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
917 | .maxlen = sizeof(int), | |
918 | .mode = 0644, | |
919 | .proc_handler = proc_dointvec_minmax, | |
920 | .extra1 = &zero, | |
921 | .extra2 = &one, | |
922 | }, | |
55537871 JK |
923 | { |
924 | .procname = "hardlockup_all_cpu_backtrace", | |
925 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
926 | .maxlen = sizeof(int), | |
927 | .mode = 0644, | |
928 | .proc_handler = proc_dointvec_minmax, | |
929 | .extra1 = &zero, | |
930 | .extra2 = &one, | |
931 | }, | |
ed235875 | 932 | #endif /* CONFIG_SMP */ |
5dc30558 DZ |
933 | #endif |
934 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
935 | { | |
936 | .procname = "unknown_nmi_panic", | |
937 | .data = &unknown_nmi_panic, | |
938 | .maxlen = sizeof (int), | |
939 | .mode = 0644, | |
940 | .proc_handler = proc_dointvec, | |
941 | }, | |
504d7cf1 | 942 | #endif |
1da177e4 | 943 | #if defined(CONFIG_X86) |
8da5adda | 944 | { |
8da5adda DZ |
945 | .procname = "panic_on_unrecovered_nmi", |
946 | .data = &panic_on_unrecovered_nmi, | |
947 | .maxlen = sizeof(int), | |
948 | .mode = 0644, | |
6d456111 | 949 | .proc_handler = proc_dointvec, |
8da5adda | 950 | }, |
5211a242 | 951 | { |
5211a242 KG |
952 | .procname = "panic_on_io_nmi", |
953 | .data = &panic_on_io_nmi, | |
954 | .maxlen = sizeof(int), | |
955 | .mode = 0644, | |
6d456111 | 956 | .proc_handler = proc_dointvec, |
5211a242 | 957 | }, |
55af7796 MH |
958 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
959 | { | |
960 | .procname = "panic_on_stackoverflow", | |
961 | .data = &sysctl_panic_on_stackoverflow, | |
962 | .maxlen = sizeof(int), | |
963 | .mode = 0644, | |
964 | .proc_handler = proc_dointvec, | |
965 | }, | |
966 | #endif | |
1da177e4 | 967 | { |
1da177e4 LT |
968 | .procname = "bootloader_type", |
969 | .data = &bootloader_type, | |
970 | .maxlen = sizeof (int), | |
971 | .mode = 0444, | |
6d456111 | 972 | .proc_handler = proc_dointvec, |
1da177e4 | 973 | }, |
5031296c | 974 | { |
5031296c PA |
975 | .procname = "bootloader_version", |
976 | .data = &bootloader_version, | |
977 | .maxlen = sizeof (int), | |
978 | .mode = 0444, | |
6d456111 | 979 | .proc_handler = proc_dointvec, |
5031296c | 980 | }, |
0741f4d2 | 981 | { |
0741f4d2 CE |
982 | .procname = "kstack_depth_to_print", |
983 | .data = &kstack_depth_to_print, | |
984 | .maxlen = sizeof(int), | |
985 | .mode = 0644, | |
6d456111 | 986 | .proc_handler = proc_dointvec, |
0741f4d2 | 987 | }, |
6e7c4025 | 988 | { |
6e7c4025 IM |
989 | .procname = "io_delay_type", |
990 | .data = &io_delay_type, | |
991 | .maxlen = sizeof(int), | |
992 | .mode = 0644, | |
6d456111 | 993 | .proc_handler = proc_dointvec, |
6e7c4025 | 994 | }, |
1da177e4 | 995 | #endif |
7a9166e3 | 996 | #if defined(CONFIG_MMU) |
1da177e4 | 997 | { |
1da177e4 LT |
998 | .procname = "randomize_va_space", |
999 | .data = &randomize_va_space, | |
1000 | .maxlen = sizeof(int), | |
1001 | .mode = 0644, | |
6d456111 | 1002 | .proc_handler = proc_dointvec, |
1da177e4 | 1003 | }, |
7a9166e3 | 1004 | #endif |
0152fb37 | 1005 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1006 | { |
951f22d5 MS |
1007 | .procname = "spin_retry", |
1008 | .data = &spin_retry, | |
1009 | .maxlen = sizeof (int), | |
1010 | .mode = 0644, | |
6d456111 | 1011 | .proc_handler = proc_dointvec, |
951f22d5 | 1012 | }, |
c255d844 | 1013 | #endif |
673d5b43 | 1014 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1015 | { |
c255d844 | 1016 | .procname = "acpi_video_flags", |
77afcf78 | 1017 | .data = &acpi_realmode_flags, |
c255d844 PM |
1018 | .maxlen = sizeof (unsigned long), |
1019 | .mode = 0644, | |
6d456111 | 1020 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1021 | }, |
d2b176ed | 1022 | #endif |
b6fca725 | 1023 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1024 | { |
d2b176ed JS |
1025 | .procname = "ignore-unaligned-usertrap", |
1026 | .data = &no_unaligned_warning, | |
1027 | .maxlen = sizeof (int), | |
1028 | .mode = 0644, | |
6d456111 | 1029 | .proc_handler = proc_dointvec, |
d2b176ed | 1030 | }, |
b6fca725 VG |
1031 | #endif |
1032 | #ifdef CONFIG_IA64 | |
88fc241f | 1033 | { |
88fc241f DC |
1034 | .procname = "unaligned-dump-stack", |
1035 | .data = &unaligned_dump_stack, | |
1036 | .maxlen = sizeof (int), | |
1037 | .mode = 0644, | |
6d456111 | 1038 | .proc_handler = proc_dointvec, |
88fc241f | 1039 | }, |
bebfa101 | 1040 | #endif |
e162b39a MSB |
1041 | #ifdef CONFIG_DETECT_HUNG_TASK |
1042 | { | |
e162b39a MSB |
1043 | .procname = "hung_task_panic", |
1044 | .data = &sysctl_hung_task_panic, | |
1045 | .maxlen = sizeof(int), | |
1046 | .mode = 0644, | |
6d456111 | 1047 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1048 | .extra1 = &zero, |
1049 | .extra2 = &one, | |
1050 | }, | |
82a1fcb9 | 1051 | { |
82a1fcb9 IM |
1052 | .procname = "hung_task_check_count", |
1053 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1054 | .maxlen = sizeof(int), |
82a1fcb9 | 1055 | .mode = 0644, |
cd64647f LZ |
1056 | .proc_handler = proc_dointvec_minmax, |
1057 | .extra1 = &zero, | |
82a1fcb9 IM |
1058 | }, |
1059 | { | |
82a1fcb9 IM |
1060 | .procname = "hung_task_timeout_secs", |
1061 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1062 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1063 | .mode = 0644, |
6d456111 | 1064 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1065 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1066 | }, |
1067 | { | |
82a1fcb9 IM |
1068 | .procname = "hung_task_warnings", |
1069 | .data = &sysctl_hung_task_warnings, | |
270750db | 1070 | .maxlen = sizeof(int), |
82a1fcb9 | 1071 | .mode = 0644, |
270750db AT |
1072 | .proc_handler = proc_dointvec_minmax, |
1073 | .extra1 = &neg_one, | |
82a1fcb9 | 1074 | }, |
c4f3b63f | 1075 | #endif |
bebfa101 AK |
1076 | #ifdef CONFIG_COMPAT |
1077 | { | |
bebfa101 AK |
1078 | .procname = "compat-log", |
1079 | .data = &compat_log, | |
1080 | .maxlen = sizeof (int), | |
1081 | .mode = 0644, | |
6d456111 | 1082 | .proc_handler = proc_dointvec, |
bebfa101 | 1083 | }, |
951f22d5 | 1084 | #endif |
23f78d4a IM |
1085 | #ifdef CONFIG_RT_MUTEXES |
1086 | { | |
23f78d4a IM |
1087 | .procname = "max_lock_depth", |
1088 | .data = &max_lock_depth, | |
1089 | .maxlen = sizeof(int), | |
1090 | .mode = 0644, | |
6d456111 | 1091 | .proc_handler = proc_dointvec, |
23f78d4a | 1092 | }, |
5096add8 | 1093 | #endif |
10a0a8d4 | 1094 | { |
10a0a8d4 JF |
1095 | .procname = "poweroff_cmd", |
1096 | .data = &poweroff_cmd, | |
1097 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1098 | .mode = 0644, | |
6d456111 | 1099 | .proc_handler = proc_dostring, |
10a0a8d4 | 1100 | }, |
0b77f5bf DH |
1101 | #ifdef CONFIG_KEYS |
1102 | { | |
0b77f5bf DH |
1103 | .procname = "keys", |
1104 | .mode = 0555, | |
1105 | .child = key_sysctls, | |
1106 | }, | |
1107 | #endif | |
cdd6c482 | 1108 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1109 | /* |
1110 | * User-space scripts rely on the existence of this file | |
1111 | * as a feature check for perf_events being enabled. | |
1112 | * | |
1113 | * So it's an ABI, do not remove! | |
1114 | */ | |
1ccd1549 | 1115 | { |
cdd6c482 IM |
1116 | .procname = "perf_event_paranoid", |
1117 | .data = &sysctl_perf_event_paranoid, | |
1118 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1119 | .mode = 0644, |
6d456111 | 1120 | .proc_handler = proc_dointvec, |
1ccd1549 | 1121 | }, |
c5078f78 | 1122 | { |
cdd6c482 IM |
1123 | .procname = "perf_event_mlock_kb", |
1124 | .data = &sysctl_perf_event_mlock, | |
1125 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1126 | .mode = 0644, |
6d456111 | 1127 | .proc_handler = proc_dointvec, |
c5078f78 | 1128 | }, |
a78ac325 | 1129 | { |
cdd6c482 IM |
1130 | .procname = "perf_event_max_sample_rate", |
1131 | .data = &sysctl_perf_event_sample_rate, | |
1132 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1133 | .mode = 0644, |
163ec435 | 1134 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1135 | .extra1 = &one, |
a78ac325 | 1136 | }, |
14c63f17 DH |
1137 | { |
1138 | .procname = "perf_cpu_time_max_percent", | |
1139 | .data = &sysctl_perf_cpu_time_max_percent, | |
1140 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1141 | .mode = 0644, | |
1142 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1143 | .extra1 = &zero, | |
1144 | .extra2 = &one_hundred, | |
1145 | }, | |
1ccd1549 | 1146 | #endif |
dfec072e VN |
1147 | #ifdef CONFIG_KMEMCHECK |
1148 | { | |
dfec072e VN |
1149 | .procname = "kmemcheck", |
1150 | .data = &kmemcheck_enabled, | |
1151 | .maxlen = sizeof(int), | |
1152 | .mode = 0644, | |
6d456111 | 1153 | .proc_handler = proc_dointvec, |
dfec072e | 1154 | }, |
cb684b5b | 1155 | #endif |
9e3961a0 PB |
1156 | { |
1157 | .procname = "panic_on_warn", | |
1158 | .data = &panic_on_warn, | |
1159 | .maxlen = sizeof(int), | |
1160 | .mode = 0644, | |
1161 | .proc_handler = proc_dointvec_minmax, | |
1162 | .extra1 = &zero, | |
1163 | .extra2 = &one, | |
1164 | }, | |
bc7a34b8 TG |
1165 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1166 | { | |
1167 | .procname = "timer_migration", | |
1168 | .data = &sysctl_timer_migration, | |
1169 | .maxlen = sizeof(unsigned int), | |
1170 | .mode = 0644, | |
1171 | .proc_handler = timer_migration_handler, | |
1172 | }, | |
1be7f75d AS |
1173 | #endif |
1174 | #ifdef CONFIG_BPF_SYSCALL | |
1175 | { | |
1176 | .procname = "unprivileged_bpf_disabled", | |
1177 | .data = &sysctl_unprivileged_bpf_disabled, | |
1178 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1179 | .mode = 0644, | |
1180 | /* only handle a transition from default "0" to "1" */ | |
1181 | .proc_handler = proc_dointvec_minmax, | |
1182 | .extra1 = &one, | |
1183 | .extra2 = &one, | |
1184 | }, | |
bc7a34b8 | 1185 | #endif |
6fce56ec | 1186 | { } |
1da177e4 LT |
1187 | }; |
1188 | ||
d8217f07 | 1189 | static struct ctl_table vm_table[] = { |
1da177e4 | 1190 | { |
1da177e4 LT |
1191 | .procname = "overcommit_memory", |
1192 | .data = &sysctl_overcommit_memory, | |
1193 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1194 | .mode = 0644, | |
cb16e95f PH |
1195 | .proc_handler = proc_dointvec_minmax, |
1196 | .extra1 = &zero, | |
1197 | .extra2 = &two, | |
1da177e4 | 1198 | }, |
fadd8fbd | 1199 | { |
fadd8fbd KH |
1200 | .procname = "panic_on_oom", |
1201 | .data = &sysctl_panic_on_oom, | |
1202 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1203 | .mode = 0644, | |
cb16e95f PH |
1204 | .proc_handler = proc_dointvec_minmax, |
1205 | .extra1 = &zero, | |
1206 | .extra2 = &two, | |
fadd8fbd | 1207 | }, |
fe071d7e | 1208 | { |
fe071d7e DR |
1209 | .procname = "oom_kill_allocating_task", |
1210 | .data = &sysctl_oom_kill_allocating_task, | |
1211 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1212 | .mode = 0644, | |
6d456111 | 1213 | .proc_handler = proc_dointvec, |
fe071d7e | 1214 | }, |
fef1bdd6 | 1215 | { |
fef1bdd6 DR |
1216 | .procname = "oom_dump_tasks", |
1217 | .data = &sysctl_oom_dump_tasks, | |
1218 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1219 | .mode = 0644, | |
6d456111 | 1220 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1221 | }, |
1da177e4 | 1222 | { |
1da177e4 LT |
1223 | .procname = "overcommit_ratio", |
1224 | .data = &sysctl_overcommit_ratio, | |
1225 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1226 | .mode = 0644, | |
49f0ce5f JM |
1227 | .proc_handler = overcommit_ratio_handler, |
1228 | }, | |
1229 | { | |
1230 | .procname = "overcommit_kbytes", | |
1231 | .data = &sysctl_overcommit_kbytes, | |
1232 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1233 | .mode = 0644, | |
1234 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1235 | }, |
1236 | { | |
1da177e4 LT |
1237 | .procname = "page-cluster", |
1238 | .data = &page_cluster, | |
1239 | .maxlen = sizeof(int), | |
1240 | .mode = 0644, | |
cb16e95f PH |
1241 | .proc_handler = proc_dointvec_minmax, |
1242 | .extra1 = &zero, | |
1da177e4 LT |
1243 | }, |
1244 | { | |
1da177e4 LT |
1245 | .procname = "dirty_background_ratio", |
1246 | .data = &dirty_background_ratio, | |
1247 | .maxlen = sizeof(dirty_background_ratio), | |
1248 | .mode = 0644, | |
6d456111 | 1249 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1250 | .extra1 = &zero, |
1251 | .extra2 = &one_hundred, | |
1252 | }, | |
2da02997 | 1253 | { |
2da02997 DR |
1254 | .procname = "dirty_background_bytes", |
1255 | .data = &dirty_background_bytes, | |
1256 | .maxlen = sizeof(dirty_background_bytes), | |
1257 | .mode = 0644, | |
6d456111 | 1258 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1259 | .extra1 = &one_ul, |
2da02997 | 1260 | }, |
1da177e4 | 1261 | { |
1da177e4 LT |
1262 | .procname = "dirty_ratio", |
1263 | .data = &vm_dirty_ratio, | |
1264 | .maxlen = sizeof(vm_dirty_ratio), | |
1265 | .mode = 0644, | |
6d456111 | 1266 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1267 | .extra1 = &zero, |
1268 | .extra2 = &one_hundred, | |
1269 | }, | |
2da02997 | 1270 | { |
2da02997 DR |
1271 | .procname = "dirty_bytes", |
1272 | .data = &vm_dirty_bytes, | |
1273 | .maxlen = sizeof(vm_dirty_bytes), | |
1274 | .mode = 0644, | |
6d456111 | 1275 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1276 | .extra1 = &dirty_bytes_min, |
2da02997 | 1277 | }, |
1da177e4 | 1278 | { |
1da177e4 | 1279 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1280 | .data = &dirty_writeback_interval, |
1281 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1282 | .mode = 0644, |
6d456111 | 1283 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1284 | }, |
1285 | { | |
1da177e4 | 1286 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1287 | .data = &dirty_expire_interval, |
1288 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1289 | .mode = 0644, |
cb16e95f PH |
1290 | .proc_handler = proc_dointvec_minmax, |
1291 | .extra1 = &zero, | |
1da177e4 | 1292 | }, |
1efff914 TT |
1293 | { |
1294 | .procname = "dirtytime_expire_seconds", | |
1295 | .data = &dirtytime_expire_interval, | |
1296 | .maxlen = sizeof(dirty_expire_interval), | |
1297 | .mode = 0644, | |
1298 | .proc_handler = dirtytime_interval_handler, | |
1299 | .extra1 = &zero, | |
1300 | }, | |
1da177e4 | 1301 | { |
3965c9ae WL |
1302 | .procname = "nr_pdflush_threads", |
1303 | .mode = 0444 /* read-only */, | |
1304 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1305 | }, |
1306 | { | |
1da177e4 LT |
1307 | .procname = "swappiness", |
1308 | .data = &vm_swappiness, | |
1309 | .maxlen = sizeof(vm_swappiness), | |
1310 | .mode = 0644, | |
6d456111 | 1311 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1312 | .extra1 = &zero, |
1313 | .extra2 = &one_hundred, | |
1314 | }, | |
1315 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1316 | { |
1da177e4 | 1317 | .procname = "nr_hugepages", |
e5ff2159 | 1318 | .data = NULL, |
1da177e4 LT |
1319 | .maxlen = sizeof(unsigned long), |
1320 | .mode = 0644, | |
6d456111 | 1321 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1322 | }, |
1323 | #ifdef CONFIG_NUMA | |
1324 | { | |
1325 | .procname = "nr_hugepages_mempolicy", | |
1326 | .data = NULL, | |
1327 | .maxlen = sizeof(unsigned long), | |
1328 | .mode = 0644, | |
1329 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 LS |
1330 | }, |
1331 | #endif | |
1da177e4 | 1332 | { |
1da177e4 LT |
1333 | .procname = "hugetlb_shm_group", |
1334 | .data = &sysctl_hugetlb_shm_group, | |
1335 | .maxlen = sizeof(gid_t), | |
1336 | .mode = 0644, | |
6d456111 | 1337 | .proc_handler = proc_dointvec, |
1da177e4 | 1338 | }, |
396faf03 | 1339 | { |
396faf03 MG |
1340 | .procname = "hugepages_treat_as_movable", |
1341 | .data = &hugepages_treat_as_movable, | |
1342 | .maxlen = sizeof(int), | |
1343 | .mode = 0644, | |
86cdb465 | 1344 | .proc_handler = proc_dointvec, |
396faf03 | 1345 | }, |
d1c3fb1f | 1346 | { |
d1c3fb1f | 1347 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1348 | .data = NULL, |
1349 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1350 | .mode = 0644, |
6d456111 | 1351 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1352 | }, |
1da177e4 LT |
1353 | #endif |
1354 | { | |
1da177e4 LT |
1355 | .procname = "lowmem_reserve_ratio", |
1356 | .data = &sysctl_lowmem_reserve_ratio, | |
1357 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1358 | .mode = 0644, | |
6d456111 | 1359 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1360 | }, |
9d0243bc | 1361 | { |
9d0243bc AM |
1362 | .procname = "drop_caches", |
1363 | .data = &sysctl_drop_caches, | |
1364 | .maxlen = sizeof(int), | |
1365 | .mode = 0644, | |
1366 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1367 | .extra1 = &one, |
5509a5d2 | 1368 | .extra2 = &four, |
9d0243bc | 1369 | }, |
76ab0f53 MG |
1370 | #ifdef CONFIG_COMPACTION |
1371 | { | |
1372 | .procname = "compact_memory", | |
1373 | .data = &sysctl_compact_memory, | |
1374 | .maxlen = sizeof(int), | |
1375 | .mode = 0200, | |
1376 | .proc_handler = sysctl_compaction_handler, | |
1377 | }, | |
5e771905 MG |
1378 | { |
1379 | .procname = "extfrag_threshold", | |
1380 | .data = &sysctl_extfrag_threshold, | |
1381 | .maxlen = sizeof(int), | |
1382 | .mode = 0644, | |
1383 | .proc_handler = sysctl_extfrag_handler, | |
1384 | .extra1 = &min_extfrag_threshold, | |
1385 | .extra2 = &max_extfrag_threshold, | |
1386 | }, | |
5bbe3547 EM |
1387 | { |
1388 | .procname = "compact_unevictable_allowed", | |
1389 | .data = &sysctl_compact_unevictable_allowed, | |
1390 | .maxlen = sizeof(int), | |
1391 | .mode = 0644, | |
1392 | .proc_handler = proc_dointvec, | |
1393 | .extra1 = &zero, | |
1394 | .extra2 = &one, | |
1395 | }, | |
5e771905 | 1396 | |
76ab0f53 | 1397 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1398 | { |
1da177e4 LT |
1399 | .procname = "min_free_kbytes", |
1400 | .data = &min_free_kbytes, | |
1401 | .maxlen = sizeof(min_free_kbytes), | |
1402 | .mode = 0644, | |
6d456111 | 1403 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1404 | .extra1 = &zero, |
1405 | }, | |
8ad4b1fb | 1406 | { |
8ad4b1fb RS |
1407 | .procname = "percpu_pagelist_fraction", |
1408 | .data = &percpu_pagelist_fraction, | |
1409 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1410 | .mode = 0644, | |
6d456111 | 1411 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1412 | .extra1 = &zero, |
8ad4b1fb | 1413 | }, |
1da177e4 LT |
1414 | #ifdef CONFIG_MMU |
1415 | { | |
1da177e4 LT |
1416 | .procname = "max_map_count", |
1417 | .data = &sysctl_max_map_count, | |
1418 | .maxlen = sizeof(sysctl_max_map_count), | |
1419 | .mode = 0644, | |
3e26120c | 1420 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1421 | .extra1 = &zero, |
1da177e4 | 1422 | }, |
dd8632a1 PM |
1423 | #else |
1424 | { | |
dd8632a1 PM |
1425 | .procname = "nr_trim_pages", |
1426 | .data = &sysctl_nr_trim_pages, | |
1427 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1428 | .mode = 0644, | |
6d456111 | 1429 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1430 | .extra1 = &zero, |
1431 | }, | |
1da177e4 LT |
1432 | #endif |
1433 | { | |
1da177e4 LT |
1434 | .procname = "laptop_mode", |
1435 | .data = &laptop_mode, | |
1436 | .maxlen = sizeof(laptop_mode), | |
1437 | .mode = 0644, | |
6d456111 | 1438 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1439 | }, |
1440 | { | |
1da177e4 LT |
1441 | .procname = "block_dump", |
1442 | .data = &block_dump, | |
1443 | .maxlen = sizeof(block_dump), | |
1444 | .mode = 0644, | |
6d456111 | 1445 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1446 | .extra1 = &zero, |
1447 | }, | |
1448 | { | |
1da177e4 LT |
1449 | .procname = "vfs_cache_pressure", |
1450 | .data = &sysctl_vfs_cache_pressure, | |
1451 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1452 | .mode = 0644, | |
6d456111 | 1453 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1454 | .extra1 = &zero, |
1455 | }, | |
1456 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1457 | { | |
1da177e4 LT |
1458 | .procname = "legacy_va_layout", |
1459 | .data = &sysctl_legacy_va_layout, | |
1460 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1461 | .mode = 0644, | |
6d456111 | 1462 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1463 | .extra1 = &zero, |
1464 | }, | |
1465 | #endif | |
1743660b CL |
1466 | #ifdef CONFIG_NUMA |
1467 | { | |
1743660b CL |
1468 | .procname = "zone_reclaim_mode", |
1469 | .data = &zone_reclaim_mode, | |
1470 | .maxlen = sizeof(zone_reclaim_mode), | |
1471 | .mode = 0644, | |
6d456111 | 1472 | .proc_handler = proc_dointvec, |
c84db23c | 1473 | .extra1 = &zero, |
1743660b | 1474 | }, |
9614634f | 1475 | { |
9614634f CL |
1476 | .procname = "min_unmapped_ratio", |
1477 | .data = &sysctl_min_unmapped_ratio, | |
1478 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1479 | .mode = 0644, | |
6d456111 | 1480 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1481 | .extra1 = &zero, |
1482 | .extra2 = &one_hundred, | |
1483 | }, | |
0ff38490 | 1484 | { |
0ff38490 CL |
1485 | .procname = "min_slab_ratio", |
1486 | .data = &sysctl_min_slab_ratio, | |
1487 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1488 | .mode = 0644, | |
6d456111 | 1489 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1490 | .extra1 = &zero, |
1491 | .extra2 = &one_hundred, | |
1492 | }, | |
e6e5494c | 1493 | #endif |
77461ab3 CL |
1494 | #ifdef CONFIG_SMP |
1495 | { | |
77461ab3 CL |
1496 | .procname = "stat_interval", |
1497 | .data = &sysctl_stat_interval, | |
1498 | .maxlen = sizeof(sysctl_stat_interval), | |
1499 | .mode = 0644, | |
6d456111 | 1500 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1501 | }, |
1502 | #endif | |
6e141546 | 1503 | #ifdef CONFIG_MMU |
ed032189 | 1504 | { |
ed032189 | 1505 | .procname = "mmap_min_addr", |
788084ab EP |
1506 | .data = &dac_mmap_min_addr, |
1507 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1508 | .mode = 0644, |
6d456111 | 1509 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1510 | }, |
6e141546 | 1511 | #endif |
f0c0b2b8 KH |
1512 | #ifdef CONFIG_NUMA |
1513 | { | |
f0c0b2b8 KH |
1514 | .procname = "numa_zonelist_order", |
1515 | .data = &numa_zonelist_order, | |
1516 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1517 | .mode = 0644, | |
6d456111 | 1518 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1519 | }, |
1520 | #endif | |
2b8232ce | 1521 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1522 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1523 | { |
e6e5494c | 1524 | .procname = "vdso_enabled", |
3d7ee969 AL |
1525 | #ifdef CONFIG_X86_32 |
1526 | .data = &vdso32_enabled, | |
1527 | .maxlen = sizeof(vdso32_enabled), | |
1528 | #else | |
e6e5494c IM |
1529 | .data = &vdso_enabled, |
1530 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1531 | #endif |
e6e5494c | 1532 | .mode = 0644, |
6d456111 | 1533 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1534 | .extra1 = &zero, |
1535 | }, | |
1da177e4 | 1536 | #endif |
195cf453 BG |
1537 | #ifdef CONFIG_HIGHMEM |
1538 | { | |
195cf453 BG |
1539 | .procname = "highmem_is_dirtyable", |
1540 | .data = &vm_highmem_is_dirtyable, | |
1541 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1542 | .mode = 0644, | |
6d456111 | 1543 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1544 | .extra1 = &zero, |
1545 | .extra2 = &one, | |
1546 | }, | |
1547 | #endif | |
6a46079c AK |
1548 | #ifdef CONFIG_MEMORY_FAILURE |
1549 | { | |
6a46079c AK |
1550 | .procname = "memory_failure_early_kill", |
1551 | .data = &sysctl_memory_failure_early_kill, | |
1552 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1553 | .mode = 0644, | |
6d456111 | 1554 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1555 | .extra1 = &zero, |
1556 | .extra2 = &one, | |
1557 | }, | |
1558 | { | |
6a46079c AK |
1559 | .procname = "memory_failure_recovery", |
1560 | .data = &sysctl_memory_failure_recovery, | |
1561 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1562 | .mode = 0644, | |
6d456111 | 1563 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1564 | .extra1 = &zero, |
1565 | .extra2 = &one, | |
1566 | }, | |
1567 | #endif | |
c9b1d098 AS |
1568 | { |
1569 | .procname = "user_reserve_kbytes", | |
1570 | .data = &sysctl_user_reserve_kbytes, | |
1571 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1572 | .mode = 0644, | |
1573 | .proc_handler = proc_doulongvec_minmax, | |
1574 | }, | |
4eeab4f5 AS |
1575 | { |
1576 | .procname = "admin_reserve_kbytes", | |
1577 | .data = &sysctl_admin_reserve_kbytes, | |
1578 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1579 | .mode = 0644, | |
1580 | .proc_handler = proc_doulongvec_minmax, | |
1581 | }, | |
d07e2259 DC |
1582 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1583 | { | |
1584 | .procname = "mmap_rnd_bits", | |
1585 | .data = &mmap_rnd_bits, | |
1586 | .maxlen = sizeof(mmap_rnd_bits), | |
1587 | .mode = 0600, | |
1588 | .proc_handler = proc_dointvec_minmax, | |
1589 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1590 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1591 | }, | |
1592 | #endif | |
1593 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1594 | { | |
1595 | .procname = "mmap_rnd_compat_bits", | |
1596 | .data = &mmap_rnd_compat_bits, | |
1597 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1598 | .mode = 0600, | |
1599 | .proc_handler = proc_dointvec_minmax, | |
1600 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1601 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1602 | }, | |
1603 | #endif | |
6fce56ec | 1604 | { } |
1da177e4 LT |
1605 | }; |
1606 | ||
d8217f07 | 1607 | static struct ctl_table fs_table[] = { |
1da177e4 | 1608 | { |
1da177e4 LT |
1609 | .procname = "inode-nr", |
1610 | .data = &inodes_stat, | |
3942c07c | 1611 | .maxlen = 2*sizeof(long), |
1da177e4 | 1612 | .mode = 0444, |
cffbc8aa | 1613 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1614 | }, |
1615 | { | |
1da177e4 LT |
1616 | .procname = "inode-state", |
1617 | .data = &inodes_stat, | |
3942c07c | 1618 | .maxlen = 7*sizeof(long), |
1da177e4 | 1619 | .mode = 0444, |
cffbc8aa | 1620 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1621 | }, |
1622 | { | |
1da177e4 LT |
1623 | .procname = "file-nr", |
1624 | .data = &files_stat, | |
518de9b3 | 1625 | .maxlen = sizeof(files_stat), |
1da177e4 | 1626 | .mode = 0444, |
6d456111 | 1627 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1628 | }, |
1629 | { | |
1da177e4 LT |
1630 | .procname = "file-max", |
1631 | .data = &files_stat.max_files, | |
518de9b3 | 1632 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1633 | .mode = 0644, |
518de9b3 | 1634 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1635 | }, |
9cfe015a | 1636 | { |
9cfe015a ED |
1637 | .procname = "nr_open", |
1638 | .data = &sysctl_nr_open, | |
1639 | .maxlen = sizeof(int), | |
1640 | .mode = 0644, | |
6d456111 | 1641 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1642 | .extra1 = &sysctl_nr_open_min, |
1643 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1644 | }, |
1da177e4 | 1645 | { |
1da177e4 LT |
1646 | .procname = "dentry-state", |
1647 | .data = &dentry_stat, | |
3942c07c | 1648 | .maxlen = 6*sizeof(long), |
1da177e4 | 1649 | .mode = 0444, |
312d3ca8 | 1650 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1651 | }, |
1652 | { | |
1da177e4 LT |
1653 | .procname = "overflowuid", |
1654 | .data = &fs_overflowuid, | |
1655 | .maxlen = sizeof(int), | |
1656 | .mode = 0644, | |
6d456111 | 1657 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1658 | .extra1 = &minolduid, |
1659 | .extra2 = &maxolduid, | |
1660 | }, | |
1661 | { | |
1da177e4 LT |
1662 | .procname = "overflowgid", |
1663 | .data = &fs_overflowgid, | |
1664 | .maxlen = sizeof(int), | |
1665 | .mode = 0644, | |
6d456111 | 1666 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1667 | .extra1 = &minolduid, |
1668 | .extra2 = &maxolduid, | |
1669 | }, | |
bfcd17a6 | 1670 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1671 | { |
1da177e4 LT |
1672 | .procname = "leases-enable", |
1673 | .data = &leases_enable, | |
1674 | .maxlen = sizeof(int), | |
1675 | .mode = 0644, | |
6d456111 | 1676 | .proc_handler = proc_dointvec, |
1da177e4 | 1677 | }, |
bfcd17a6 | 1678 | #endif |
1da177e4 LT |
1679 | #ifdef CONFIG_DNOTIFY |
1680 | { | |
1da177e4 LT |
1681 | .procname = "dir-notify-enable", |
1682 | .data = &dir_notify_enable, | |
1683 | .maxlen = sizeof(int), | |
1684 | .mode = 0644, | |
6d456111 | 1685 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1686 | }, |
1687 | #endif | |
1688 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1689 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1690 | { |
1da177e4 LT |
1691 | .procname = "lease-break-time", |
1692 | .data = &lease_break_time, | |
1693 | .maxlen = sizeof(int), | |
1694 | .mode = 0644, | |
6d456111 | 1695 | .proc_handler = proc_dointvec, |
1da177e4 | 1696 | }, |
bfcd17a6 | 1697 | #endif |
ebf3f09c | 1698 | #ifdef CONFIG_AIO |
1da177e4 | 1699 | { |
1da177e4 LT |
1700 | .procname = "aio-nr", |
1701 | .data = &aio_nr, | |
1702 | .maxlen = sizeof(aio_nr), | |
1703 | .mode = 0444, | |
6d456111 | 1704 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1705 | }, |
1706 | { | |
1da177e4 LT |
1707 | .procname = "aio-max-nr", |
1708 | .data = &aio_max_nr, | |
1709 | .maxlen = sizeof(aio_max_nr), | |
1710 | .mode = 0644, | |
6d456111 | 1711 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1712 | }, |
ebf3f09c | 1713 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1714 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1715 | { |
0399cb08 RL |
1716 | .procname = "inotify", |
1717 | .mode = 0555, | |
1718 | .child = inotify_table, | |
1719 | }, | |
1720 | #endif | |
7ef9964e DL |
1721 | #ifdef CONFIG_EPOLL |
1722 | { | |
1723 | .procname = "epoll", | |
1724 | .mode = 0555, | |
1725 | .child = epoll_table, | |
1726 | }, | |
1727 | #endif | |
1da177e4 | 1728 | #endif |
800179c9 KC |
1729 | { |
1730 | .procname = "protected_symlinks", | |
1731 | .data = &sysctl_protected_symlinks, | |
1732 | .maxlen = sizeof(int), | |
1733 | .mode = 0600, | |
1734 | .proc_handler = proc_dointvec_minmax, | |
1735 | .extra1 = &zero, | |
1736 | .extra2 = &one, | |
1737 | }, | |
1738 | { | |
1739 | .procname = "protected_hardlinks", | |
1740 | .data = &sysctl_protected_hardlinks, | |
1741 | .maxlen = sizeof(int), | |
1742 | .mode = 0600, | |
1743 | .proc_handler = proc_dointvec_minmax, | |
1744 | .extra1 = &zero, | |
1745 | .extra2 = &one, | |
1746 | }, | |
d6e71144 | 1747 | { |
d6e71144 AC |
1748 | .procname = "suid_dumpable", |
1749 | .data = &suid_dumpable, | |
1750 | .maxlen = sizeof(int), | |
1751 | .mode = 0644, | |
54b50199 | 1752 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1753 | .extra1 = &zero, |
1754 | .extra2 = &two, | |
d6e71144 | 1755 | }, |
2abc26fc EB |
1756 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1757 | { | |
2abc26fc EB |
1758 | .procname = "binfmt_misc", |
1759 | .mode = 0555, | |
f9bd6733 | 1760 | .child = sysctl_mount_point, |
2abc26fc EB |
1761 | }, |
1762 | #endif | |
b492e95b | 1763 | { |
ff9da691 JA |
1764 | .procname = "pipe-max-size", |
1765 | .data = &pipe_max_size, | |
b492e95b JA |
1766 | .maxlen = sizeof(int), |
1767 | .mode = 0644, | |
ff9da691 JA |
1768 | .proc_handler = &pipe_proc_fn, |
1769 | .extra1 = &pipe_min_size, | |
b492e95b | 1770 | }, |
759c0114 WT |
1771 | { |
1772 | .procname = "pipe-user-pages-hard", | |
1773 | .data = &pipe_user_pages_hard, | |
1774 | .maxlen = sizeof(pipe_user_pages_hard), | |
1775 | .mode = 0644, | |
1776 | .proc_handler = proc_doulongvec_minmax, | |
1777 | }, | |
1778 | { | |
1779 | .procname = "pipe-user-pages-soft", | |
1780 | .data = &pipe_user_pages_soft, | |
1781 | .maxlen = sizeof(pipe_user_pages_soft), | |
1782 | .mode = 0644, | |
1783 | .proc_handler = proc_doulongvec_minmax, | |
1784 | }, | |
6fce56ec | 1785 | { } |
1da177e4 LT |
1786 | }; |
1787 | ||
d8217f07 | 1788 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1789 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1790 | { |
abd4f750 MAS |
1791 | .procname = "exception-trace", |
1792 | .data = &show_unhandled_signals, | |
1793 | .maxlen = sizeof(int), | |
1794 | .mode = 0644, | |
1795 | .proc_handler = proc_dointvec | |
1796 | }, | |
b2be84df MH |
1797 | #endif |
1798 | #if defined(CONFIG_OPTPROBES) | |
1799 | { | |
1800 | .procname = "kprobes-optimization", | |
1801 | .data = &sysctl_kprobes_optimization, | |
1802 | .maxlen = sizeof(int), | |
1803 | .mode = 0644, | |
1804 | .proc_handler = proc_kprobes_optimization_handler, | |
1805 | .extra1 = &zero, | |
1806 | .extra2 = &one, | |
1807 | }, | |
abd4f750 | 1808 | #endif |
6fce56ec | 1809 | { } |
1da177e4 LT |
1810 | }; |
1811 | ||
d8217f07 | 1812 | static struct ctl_table dev_table[] = { |
6fce56ec | 1813 | { } |
0eeca283 | 1814 | }; |
1da177e4 | 1815 | |
de4e83bd | 1816 | int __init sysctl_init(void) |
d912b0cc | 1817 | { |
fd4b616b SR |
1818 | struct ctl_table_header *hdr; |
1819 | ||
1820 | hdr = register_sysctl_table(sysctl_base_table); | |
1821 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1822 | return 0; |
1823 | } | |
1824 | ||
b89a8171 EB |
1825 | #endif /* CONFIG_SYSCTL */ |
1826 | ||
1da177e4 LT |
1827 | /* |
1828 | * /proc/sys support | |
1829 | */ | |
1830 | ||
b89a8171 | 1831 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1832 | |
f8808300 KC |
1833 | static int _proc_do_string(char *data, int maxlen, int write, |
1834 | char __user *buffer, | |
b1ba4ddd | 1835 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1836 | { |
1837 | size_t len; | |
1838 | char __user *p; | |
1839 | char c; | |
8d060877 ON |
1840 | |
1841 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1842 | *lenp = 0; |
1843 | return 0; | |
1844 | } | |
8d060877 | 1845 | |
1da177e4 | 1846 | if (write) { |
f4aacea2 KC |
1847 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1848 | /* Only continue writes not past the end of buffer. */ | |
1849 | len = strlen(data); | |
1850 | if (len > maxlen - 1) | |
1851 | len = maxlen - 1; | |
1852 | ||
1853 | if (*ppos > len) | |
1854 | return 0; | |
1855 | len = *ppos; | |
1856 | } else { | |
1857 | /* Start writing from beginning of buffer. */ | |
1858 | len = 0; | |
1859 | } | |
1860 | ||
2ca9bb45 | 1861 | *ppos += *lenp; |
1da177e4 | 1862 | p = buffer; |
2ca9bb45 | 1863 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1864 | if (get_user(c, p++)) |
1865 | return -EFAULT; | |
1866 | if (c == 0 || c == '\n') | |
1867 | break; | |
2ca9bb45 | 1868 | data[len++] = c; |
1da177e4 | 1869 | } |
f8808300 | 1870 | data[len] = 0; |
1da177e4 | 1871 | } else { |
f5dd3d6f SV |
1872 | len = strlen(data); |
1873 | if (len > maxlen) | |
1874 | len = maxlen; | |
8d060877 ON |
1875 | |
1876 | if (*ppos > len) { | |
1877 | *lenp = 0; | |
1878 | return 0; | |
1879 | } | |
1880 | ||
1881 | data += *ppos; | |
1882 | len -= *ppos; | |
1883 | ||
1da177e4 LT |
1884 | if (len > *lenp) |
1885 | len = *lenp; | |
1886 | if (len) | |
f8808300 | 1887 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1888 | return -EFAULT; |
1889 | if (len < *lenp) { | |
f8808300 | 1890 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1891 | return -EFAULT; |
1892 | len++; | |
1893 | } | |
1894 | *lenp = len; | |
1895 | *ppos += len; | |
1896 | } | |
1897 | return 0; | |
1898 | } | |
1899 | ||
f4aacea2 KC |
1900 | static void warn_sysctl_write(struct ctl_table *table) |
1901 | { | |
1902 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1903 | "This will not be supported in the future. To silence this\n" | |
1904 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1905 | current->comm, table->procname); | |
1906 | } | |
1907 | ||
f5dd3d6f SV |
1908 | /** |
1909 | * proc_dostring - read a string sysctl | |
1910 | * @table: the sysctl table | |
1911 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1912 | * @buffer: the user buffer |
1913 | * @lenp: the size of the user buffer | |
1914 | * @ppos: file position | |
1915 | * | |
1916 | * Reads/writes a string from/to the user buffer. If the kernel | |
1917 | * buffer provided is not large enough to hold the string, the | |
1918 | * string is truncated. The copied string is %NULL-terminated. | |
1919 | * If the string is being read by the user process, it is copied | |
1920 | * and a newline '\n' is added. It is truncated if the buffer is | |
1921 | * not large enough. | |
1922 | * | |
1923 | * Returns 0 on success. | |
1924 | */ | |
8d65af78 | 1925 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1926 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1927 | { | |
f4aacea2 KC |
1928 | if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) |
1929 | warn_sysctl_write(table); | |
1930 | ||
f8808300 KC |
1931 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
1932 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
1933 | } |
1934 | ||
00b7c339 AW |
1935 | static size_t proc_skip_spaces(char **buf) |
1936 | { | |
1937 | size_t ret; | |
1938 | char *tmp = skip_spaces(*buf); | |
1939 | ret = tmp - *buf; | |
1940 | *buf = tmp; | |
1941 | return ret; | |
1942 | } | |
1943 | ||
9f977fb7 OP |
1944 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1945 | { | |
1946 | while (*size) { | |
1947 | if (**buf != v) | |
1948 | break; | |
1949 | (*size)--; | |
1950 | (*buf)++; | |
1951 | } | |
1952 | } | |
1953 | ||
00b7c339 AW |
1954 | #define TMPBUFLEN 22 |
1955 | /** | |
0fc377bd | 1956 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1957 | * |
0fc377bd RD |
1958 | * @buf: a kernel buffer |
1959 | * @size: size of the kernel buffer | |
1960 | * @val: this is where the number will be stored | |
1961 | * @neg: set to %TRUE if number is negative | |
1962 | * @perm_tr: a vector which contains the allowed trailers | |
1963 | * @perm_tr_len: size of the perm_tr vector | |
1964 | * @tr: pointer to store the trailer character | |
00b7c339 | 1965 | * |
0fc377bd RD |
1966 | * In case of success %0 is returned and @buf and @size are updated with |
1967 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1968 | * character exists (size is non-zero after returning from this | |
1969 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1970 | */ |
1971 | static int proc_get_long(char **buf, size_t *size, | |
1972 | unsigned long *val, bool *neg, | |
1973 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1974 | { | |
1975 | int len; | |
1976 | char *p, tmp[TMPBUFLEN]; | |
1977 | ||
1978 | if (!*size) | |
1979 | return -EINVAL; | |
1980 | ||
1981 | len = *size; | |
1982 | if (len > TMPBUFLEN - 1) | |
1983 | len = TMPBUFLEN - 1; | |
1984 | ||
1985 | memcpy(tmp, *buf, len); | |
1986 | ||
1987 | tmp[len] = 0; | |
1988 | p = tmp; | |
1989 | if (*p == '-' && *size > 1) { | |
1990 | *neg = true; | |
1991 | p++; | |
1992 | } else | |
1993 | *neg = false; | |
1994 | if (!isdigit(*p)) | |
1995 | return -EINVAL; | |
1996 | ||
1997 | *val = simple_strtoul(p, &p, 0); | |
1998 | ||
1999 | len = p - tmp; | |
2000 | ||
2001 | /* We don't know if the next char is whitespace thus we may accept | |
2002 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2003 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2004 | if (len == TMPBUFLEN - 1) | |
2005 | return -EINVAL; | |
2006 | ||
2007 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2008 | return -EINVAL; | |
1da177e4 | 2009 | |
00b7c339 AW |
2010 | if (tr && (len < *size)) |
2011 | *tr = *p; | |
2012 | ||
2013 | *buf += len; | |
2014 | *size -= len; | |
2015 | ||
2016 | return 0; | |
2017 | } | |
2018 | ||
2019 | /** | |
0fc377bd | 2020 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2021 | * |
0fc377bd RD |
2022 | * @buf: the user buffer |
2023 | * @size: the size of the user buffer | |
2024 | * @val: the integer to be converted | |
2025 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2026 | * |
0fc377bd RD |
2027 | * In case of success %0 is returned and @buf and @size are updated with |
2028 | * the amount of bytes written. | |
00b7c339 AW |
2029 | */ |
2030 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2031 | bool neg) | |
2032 | { | |
2033 | int len; | |
2034 | char tmp[TMPBUFLEN], *p = tmp; | |
2035 | ||
2036 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2037 | len = strlen(tmp); | |
2038 | if (len > *size) | |
2039 | len = *size; | |
2040 | if (copy_to_user(*buf, tmp, len)) | |
2041 | return -EFAULT; | |
2042 | *size -= len; | |
2043 | *buf += len; | |
2044 | return 0; | |
2045 | } | |
2046 | #undef TMPBUFLEN | |
2047 | ||
2048 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2049 | { | |
2050 | if (*size) { | |
2051 | char __user **buffer = (char __user **)buf; | |
2052 | if (put_user(c, *buffer)) | |
2053 | return -EFAULT; | |
2054 | (*size)--, (*buffer)++; | |
2055 | *buf = *buffer; | |
2056 | } | |
2057 | return 0; | |
2058 | } | |
1da177e4 | 2059 | |
00b7c339 | 2060 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2061 | int *valp, |
2062 | int write, void *data) | |
2063 | { | |
2064 | if (write) { | |
230633d1 HS |
2065 | if (*negp) { |
2066 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2067 | return -EINVAL; | |
2068 | *valp = -*lvalp; | |
2069 | } else { | |
2070 | if (*lvalp > (unsigned long) INT_MAX) | |
2071 | return -EINVAL; | |
2072 | *valp = *lvalp; | |
2073 | } | |
1da177e4 LT |
2074 | } else { |
2075 | int val = *valp; | |
2076 | if (val < 0) { | |
00b7c339 | 2077 | *negp = true; |
9a5bc726 | 2078 | *lvalp = -(unsigned long)val; |
1da177e4 | 2079 | } else { |
00b7c339 | 2080 | *negp = false; |
1da177e4 LT |
2081 | *lvalp = (unsigned long)val; |
2082 | } | |
2083 | } | |
2084 | return 0; | |
2085 | } | |
2086 | ||
00b7c339 AW |
2087 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2088 | ||
d8217f07 | 2089 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2090 | int write, void __user *buffer, |
fcfbd547 | 2091 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2092 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2093 | int write, void *data), |
2094 | void *data) | |
2095 | { | |
00b7c339 | 2096 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2097 | size_t left; |
70f6cbb6 | 2098 | char *kbuf = NULL, *p; |
1da177e4 | 2099 | |
00b7c339 | 2100 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2101 | *lenp = 0; |
2102 | return 0; | |
2103 | } | |
2104 | ||
fcfbd547 | 2105 | i = (int *) tbl_data; |
1da177e4 LT |
2106 | vleft = table->maxlen / sizeof(*i); |
2107 | left = *lenp; | |
2108 | ||
2109 | if (!conv) | |
2110 | conv = do_proc_dointvec_conv; | |
2111 | ||
00b7c339 | 2112 | if (write) { |
f4aacea2 KC |
2113 | if (*ppos) { |
2114 | switch (sysctl_writes_strict) { | |
2115 | case SYSCTL_WRITES_STRICT: | |
2116 | goto out; | |
2117 | case SYSCTL_WRITES_WARN: | |
2118 | warn_sysctl_write(table); | |
2119 | break; | |
2120 | default: | |
2121 | break; | |
2122 | } | |
2123 | } | |
2124 | ||
00b7c339 AW |
2125 | if (left > PAGE_SIZE - 1) |
2126 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2127 | p = kbuf = memdup_user_nul(buffer, left); |
2128 | if (IS_ERR(kbuf)) | |
2129 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2130 | } |
2131 | ||
1da177e4 | 2132 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2133 | unsigned long lval; |
2134 | bool neg; | |
1da177e4 | 2135 | |
00b7c339 | 2136 | if (write) { |
70f6cbb6 | 2137 | left -= proc_skip_spaces(&p); |
1da177e4 | 2138 | |
563b0467 O |
2139 | if (!left) |
2140 | break; | |
70f6cbb6 | 2141 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2142 | proc_wspace_sep, |
2143 | sizeof(proc_wspace_sep), NULL); | |
2144 | if (err) | |
1da177e4 | 2145 | break; |
00b7c339 AW |
2146 | if (conv(&neg, &lval, i, 1, data)) { |
2147 | err = -EINVAL; | |
1da177e4 | 2148 | break; |
00b7c339 | 2149 | } |
1da177e4 | 2150 | } else { |
00b7c339 AW |
2151 | if (conv(&neg, &lval, i, 0, data)) { |
2152 | err = -EINVAL; | |
2153 | break; | |
2154 | } | |
1da177e4 | 2155 | if (!first) |
00b7c339 AW |
2156 | err = proc_put_char(&buffer, &left, '\t'); |
2157 | if (err) | |
2158 | break; | |
2159 | err = proc_put_long(&buffer, &left, lval, neg); | |
2160 | if (err) | |
1da177e4 | 2161 | break; |
1da177e4 LT |
2162 | } |
2163 | } | |
2164 | ||
00b7c339 AW |
2165 | if (!write && !first && left && !err) |
2166 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2167 | if (write && !err && left) |
70f6cbb6 | 2168 | left -= proc_skip_spaces(&p); |
1da177e4 | 2169 | if (write) { |
70f6cbb6 | 2170 | kfree(kbuf); |
00b7c339 AW |
2171 | if (first) |
2172 | return err ? : -EINVAL; | |
1da177e4 | 2173 | } |
1da177e4 | 2174 | *lenp -= left; |
f4aacea2 | 2175 | out: |
1da177e4 | 2176 | *ppos += *lenp; |
00b7c339 | 2177 | return err; |
1da177e4 LT |
2178 | } |
2179 | ||
8d65af78 | 2180 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2181 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2182 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2183 | int write, void *data), |
2184 | void *data) | |
2185 | { | |
8d65af78 | 2186 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2187 | buffer, lenp, ppos, conv, data); |
2188 | } | |
2189 | ||
1da177e4 LT |
2190 | /** |
2191 | * proc_dointvec - read a vector of integers | |
2192 | * @table: the sysctl table | |
2193 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2194 | * @buffer: the user buffer |
2195 | * @lenp: the size of the user buffer | |
2196 | * @ppos: file position | |
2197 | * | |
2198 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2199 | * values from/to the user buffer, treated as an ASCII string. | |
2200 | * | |
2201 | * Returns 0 on success. | |
2202 | */ | |
8d65af78 | 2203 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2204 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2205 | { | |
8d65af78 | 2206 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2207 | NULL,NULL); |
2208 | } | |
2209 | ||
34f5a398 | 2210 | /* |
25ddbb18 AK |
2211 | * Taint values can only be increased |
2212 | * This means we can safely use a temporary. | |
34f5a398 | 2213 | */ |
8d65af78 | 2214 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2215 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2216 | { | |
25ddbb18 AK |
2217 | struct ctl_table t; |
2218 | unsigned long tmptaint = get_taint(); | |
2219 | int err; | |
34f5a398 | 2220 | |
91fcd412 | 2221 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2222 | return -EPERM; |
2223 | ||
25ddbb18 AK |
2224 | t = *table; |
2225 | t.data = &tmptaint; | |
8d65af78 | 2226 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2227 | if (err < 0) |
2228 | return err; | |
2229 | ||
2230 | if (write) { | |
2231 | /* | |
2232 | * Poor man's atomic or. Not worth adding a primitive | |
2233 | * to everyone's atomic.h for this | |
2234 | */ | |
2235 | int i; | |
2236 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2237 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2238 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2239 | } |
2240 | } | |
2241 | ||
2242 | return err; | |
34f5a398 TT |
2243 | } |
2244 | ||
bfdc0b49 | 2245 | #ifdef CONFIG_PRINTK |
620f6e8e | 2246 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2247 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2248 | { | |
2249 | if (write && !capable(CAP_SYS_ADMIN)) | |
2250 | return -EPERM; | |
2251 | ||
2252 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2253 | } | |
2254 | #endif | |
2255 | ||
1da177e4 LT |
2256 | struct do_proc_dointvec_minmax_conv_param { |
2257 | int *min; | |
2258 | int *max; | |
2259 | }; | |
2260 | ||
00b7c339 AW |
2261 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2262 | int *valp, | |
1da177e4 LT |
2263 | int write, void *data) |
2264 | { | |
2265 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2266 | if (write) { | |
2267 | int val = *negp ? -*lvalp : *lvalp; | |
2268 | if ((param->min && *param->min > val) || | |
2269 | (param->max && *param->max < val)) | |
2270 | return -EINVAL; | |
2271 | *valp = val; | |
2272 | } else { | |
2273 | int val = *valp; | |
2274 | if (val < 0) { | |
00b7c339 | 2275 | *negp = true; |
9a5bc726 | 2276 | *lvalp = -(unsigned long)val; |
1da177e4 | 2277 | } else { |
00b7c339 | 2278 | *negp = false; |
1da177e4 LT |
2279 | *lvalp = (unsigned long)val; |
2280 | } | |
2281 | } | |
2282 | return 0; | |
2283 | } | |
2284 | ||
2285 | /** | |
2286 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2287 | * @table: the sysctl table | |
2288 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2289 | * @buffer: the user buffer |
2290 | * @lenp: the size of the user buffer | |
2291 | * @ppos: file position | |
2292 | * | |
2293 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2294 | * values from/to the user buffer, treated as an ASCII string. | |
2295 | * | |
2296 | * This routine will ensure the values are within the range specified by | |
2297 | * table->extra1 (min) and table->extra2 (max). | |
2298 | * | |
2299 | * Returns 0 on success. | |
2300 | */ | |
8d65af78 | 2301 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2302 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2303 | { | |
2304 | struct do_proc_dointvec_minmax_conv_param param = { | |
2305 | .min = (int *) table->extra1, | |
2306 | .max = (int *) table->extra2, | |
2307 | }; | |
8d65af78 | 2308 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2309 | do_proc_dointvec_minmax_conv, ¶m); |
2310 | } | |
2311 | ||
54b50199 KC |
2312 | static void validate_coredump_safety(void) |
2313 | { | |
046d662f | 2314 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2315 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 KC |
2316 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
2317 | printk(KERN_WARNING "Unsafe core_pattern used with "\ | |
2318 | "suid_dumpable=2. Pipe handler or fully qualified "\ | |
2319 | "core dump path required.\n"); | |
2320 | } | |
046d662f | 2321 | #endif |
54b50199 KC |
2322 | } |
2323 | ||
2324 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2325 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2326 | { | |
2327 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2328 | if (!error) | |
2329 | validate_coredump_safety(); | |
2330 | return error; | |
2331 | } | |
2332 | ||
046d662f | 2333 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2334 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2335 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2336 | { | |
2337 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2338 | if (!error) | |
2339 | validate_coredump_safety(); | |
2340 | return error; | |
2341 | } | |
046d662f | 2342 | #endif |
54b50199 | 2343 | |
d8217f07 | 2344 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2345 | void __user *buffer, |
2346 | size_t *lenp, loff_t *ppos, | |
2347 | unsigned long convmul, | |
2348 | unsigned long convdiv) | |
2349 | { | |
00b7c339 AW |
2350 | unsigned long *i, *min, *max; |
2351 | int vleft, first = 1, err = 0; | |
00b7c339 | 2352 | size_t left; |
70f6cbb6 | 2353 | char *kbuf = NULL, *p; |
00b7c339 AW |
2354 | |
2355 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2356 | *lenp = 0; |
2357 | return 0; | |
2358 | } | |
00b7c339 | 2359 | |
fcfbd547 | 2360 | i = (unsigned long *) data; |
1da177e4 LT |
2361 | min = (unsigned long *) table->extra1; |
2362 | max = (unsigned long *) table->extra2; | |
2363 | vleft = table->maxlen / sizeof(unsigned long); | |
2364 | left = *lenp; | |
00b7c339 AW |
2365 | |
2366 | if (write) { | |
f4aacea2 KC |
2367 | if (*ppos) { |
2368 | switch (sysctl_writes_strict) { | |
2369 | case SYSCTL_WRITES_STRICT: | |
2370 | goto out; | |
2371 | case SYSCTL_WRITES_WARN: | |
2372 | warn_sysctl_write(table); | |
2373 | break; | |
2374 | default: | |
2375 | break; | |
2376 | } | |
2377 | } | |
2378 | ||
00b7c339 AW |
2379 | if (left > PAGE_SIZE - 1) |
2380 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2381 | p = kbuf = memdup_user_nul(buffer, left); |
2382 | if (IS_ERR(kbuf)) | |
2383 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2384 | } |
2385 | ||
27b3d80a | 2386 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2387 | unsigned long val; |
2388 | ||
1da177e4 | 2389 | if (write) { |
00b7c339 AW |
2390 | bool neg; |
2391 | ||
70f6cbb6 | 2392 | left -= proc_skip_spaces(&p); |
00b7c339 | 2393 | |
70f6cbb6 | 2394 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2395 | proc_wspace_sep, |
2396 | sizeof(proc_wspace_sep), NULL); | |
2397 | if (err) | |
1da177e4 LT |
2398 | break; |
2399 | if (neg) | |
1da177e4 LT |
2400 | continue; |
2401 | if ((min && val < *min) || (max && val > *max)) | |
2402 | continue; | |
2403 | *i = val; | |
2404 | } else { | |
00b7c339 | 2405 | val = convdiv * (*i) / convmul; |
7833819d | 2406 | if (!first) { |
00b7c339 | 2407 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2408 | if (err) |
2409 | break; | |
2410 | } | |
00b7c339 AW |
2411 | err = proc_put_long(&buffer, &left, val, false); |
2412 | if (err) | |
2413 | break; | |
1da177e4 LT |
2414 | } |
2415 | } | |
2416 | ||
00b7c339 AW |
2417 | if (!write && !first && left && !err) |
2418 | err = proc_put_char(&buffer, &left, '\n'); | |
2419 | if (write && !err) | |
70f6cbb6 | 2420 | left -= proc_skip_spaces(&p); |
1da177e4 | 2421 | if (write) { |
70f6cbb6 | 2422 | kfree(kbuf); |
00b7c339 AW |
2423 | if (first) |
2424 | return err ? : -EINVAL; | |
1da177e4 | 2425 | } |
1da177e4 | 2426 | *lenp -= left; |
f4aacea2 | 2427 | out: |
1da177e4 | 2428 | *ppos += *lenp; |
00b7c339 | 2429 | return err; |
1da177e4 LT |
2430 | } |
2431 | ||
d8217f07 | 2432 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2433 | void __user *buffer, |
2434 | size_t *lenp, loff_t *ppos, | |
2435 | unsigned long convmul, | |
2436 | unsigned long convdiv) | |
2437 | { | |
2438 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2439 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2440 | } |
2441 | ||
1da177e4 LT |
2442 | /** |
2443 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2444 | * @table: the sysctl table | |
2445 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2446 | * @buffer: the user buffer |
2447 | * @lenp: the size of the user buffer | |
2448 | * @ppos: file position | |
2449 | * | |
2450 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2451 | * values from/to the user buffer, treated as an ASCII string. | |
2452 | * | |
2453 | * This routine will ensure the values are within the range specified by | |
2454 | * table->extra1 (min) and table->extra2 (max). | |
2455 | * | |
2456 | * Returns 0 on success. | |
2457 | */ | |
8d65af78 | 2458 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2459 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2460 | { | |
8d65af78 | 2461 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2462 | } |
2463 | ||
2464 | /** | |
2465 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2466 | * @table: the sysctl table | |
2467 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2468 | * @buffer: the user buffer |
2469 | * @lenp: the size of the user buffer | |
2470 | * @ppos: file position | |
2471 | * | |
2472 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2473 | * values from/to the user buffer, treated as an ASCII string. The values | |
2474 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2475 | * | |
2476 | * This routine will ensure the values are within the range specified by | |
2477 | * table->extra1 (min) and table->extra2 (max). | |
2478 | * | |
2479 | * Returns 0 on success. | |
2480 | */ | |
d8217f07 | 2481 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2482 | void __user *buffer, |
2483 | size_t *lenp, loff_t *ppos) | |
2484 | { | |
8d65af78 | 2485 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2486 | lenp, ppos, HZ, 1000l); |
2487 | } | |
2488 | ||
2489 | ||
00b7c339 | 2490 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2491 | int *valp, |
2492 | int write, void *data) | |
2493 | { | |
2494 | if (write) { | |
cba9f33d BS |
2495 | if (*lvalp > LONG_MAX / HZ) |
2496 | return 1; | |
1da177e4 LT |
2497 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2498 | } else { | |
2499 | int val = *valp; | |
2500 | unsigned long lval; | |
2501 | if (val < 0) { | |
00b7c339 | 2502 | *negp = true; |
9a5bc726 | 2503 | lval = -(unsigned long)val; |
1da177e4 | 2504 | } else { |
00b7c339 | 2505 | *negp = false; |
1da177e4 LT |
2506 | lval = (unsigned long)val; |
2507 | } | |
2508 | *lvalp = lval / HZ; | |
2509 | } | |
2510 | return 0; | |
2511 | } | |
2512 | ||
00b7c339 | 2513 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2514 | int *valp, |
2515 | int write, void *data) | |
2516 | { | |
2517 | if (write) { | |
cba9f33d BS |
2518 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2519 | return 1; | |
1da177e4 LT |
2520 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2521 | } else { | |
2522 | int val = *valp; | |
2523 | unsigned long lval; | |
2524 | if (val < 0) { | |
00b7c339 | 2525 | *negp = true; |
9a5bc726 | 2526 | lval = -(unsigned long)val; |
1da177e4 | 2527 | } else { |
00b7c339 | 2528 | *negp = false; |
1da177e4 LT |
2529 | lval = (unsigned long)val; |
2530 | } | |
2531 | *lvalp = jiffies_to_clock_t(lval); | |
2532 | } | |
2533 | return 0; | |
2534 | } | |
2535 | ||
00b7c339 | 2536 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2537 | int *valp, |
2538 | int write, void *data) | |
2539 | { | |
2540 | if (write) { | |
d738ce8f FF |
2541 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2542 | ||
2543 | if (jif > INT_MAX) | |
2544 | return 1; | |
2545 | *valp = (int)jif; | |
1da177e4 LT |
2546 | } else { |
2547 | int val = *valp; | |
2548 | unsigned long lval; | |
2549 | if (val < 0) { | |
00b7c339 | 2550 | *negp = true; |
9a5bc726 | 2551 | lval = -(unsigned long)val; |
1da177e4 | 2552 | } else { |
00b7c339 | 2553 | *negp = false; |
1da177e4 LT |
2554 | lval = (unsigned long)val; |
2555 | } | |
2556 | *lvalp = jiffies_to_msecs(lval); | |
2557 | } | |
2558 | return 0; | |
2559 | } | |
2560 | ||
2561 | /** | |
2562 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2563 | * @table: the sysctl table | |
2564 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2565 | * @buffer: the user buffer |
2566 | * @lenp: the size of the user buffer | |
2567 | * @ppos: file position | |
2568 | * | |
2569 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2570 | * values from/to the user buffer, treated as an ASCII string. | |
2571 | * The values read are assumed to be in seconds, and are converted into | |
2572 | * jiffies. | |
2573 | * | |
2574 | * Returns 0 on success. | |
2575 | */ | |
8d65af78 | 2576 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2577 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2578 | { | |
8d65af78 | 2579 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2580 | do_proc_dointvec_jiffies_conv,NULL); |
2581 | } | |
2582 | ||
2583 | /** | |
2584 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2585 | * @table: the sysctl table | |
2586 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2587 | * @buffer: the user buffer |
2588 | * @lenp: the size of the user buffer | |
1e5d5331 | 2589 | * @ppos: pointer to the file position |
1da177e4 LT |
2590 | * |
2591 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2592 | * values from/to the user buffer, treated as an ASCII string. | |
2593 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2594 | * are converted into jiffies. | |
2595 | * | |
2596 | * Returns 0 on success. | |
2597 | */ | |
8d65af78 | 2598 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2599 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2600 | { | |
8d65af78 | 2601 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2602 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2603 | } | |
2604 | ||
2605 | /** | |
2606 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2607 | * @table: the sysctl table | |
2608 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2609 | * @buffer: the user buffer |
2610 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2611 | * @ppos: file position |
2612 | * @ppos: the current position in the file | |
1da177e4 LT |
2613 | * |
2614 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2615 | * values from/to the user buffer, treated as an ASCII string. | |
2616 | * The values read are assumed to be in 1/1000 seconds, and | |
2617 | * are converted into jiffies. | |
2618 | * | |
2619 | * Returns 0 on success. | |
2620 | */ | |
8d65af78 | 2621 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2622 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2623 | { | |
8d65af78 | 2624 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2625 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2626 | } | |
2627 | ||
8d65af78 | 2628 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2629 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2630 | { | |
2631 | struct pid *new_pid; | |
2632 | pid_t tmp; | |
2633 | int r; | |
2634 | ||
6c5f3e7b | 2635 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2636 | |
8d65af78 | 2637 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2638 | lenp, ppos, NULL, NULL); |
2639 | if (r || !write) | |
2640 | return r; | |
2641 | ||
2642 | new_pid = find_get_pid(tmp); | |
2643 | if (!new_pid) | |
2644 | return -ESRCH; | |
2645 | ||
2646 | put_pid(xchg(&cad_pid, new_pid)); | |
2647 | return 0; | |
2648 | } | |
2649 | ||
9f977fb7 OP |
2650 | /** |
2651 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2652 | * @table: the sysctl table | |
2653 | * @write: %TRUE if this is a write to the sysctl file | |
2654 | * @buffer: the user buffer | |
2655 | * @lenp: the size of the user buffer | |
2656 | * @ppos: file position | |
2657 | * | |
2658 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2659 | * in table->maxlen. | |
2660 | * | |
2661 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2662 | * large bitmaps may be represented in a compact manner. Writing into | |
2663 | * the file will clear the bitmap then update it with the given input. | |
2664 | * | |
2665 | * Returns 0 on success. | |
2666 | */ | |
2667 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2668 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2669 | { | |
2670 | int err = 0; | |
2671 | bool first = 1; | |
2672 | size_t left = *lenp; | |
2673 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 2674 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
2675 | unsigned long *tmp_bitmap = NULL; |
2676 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2677 | ||
122ff243 | 2678 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
2679 | *lenp = 0; |
2680 | return 0; | |
2681 | } | |
2682 | ||
2683 | if (write) { | |
70f6cbb6 | 2684 | char *kbuf, *p; |
9f977fb7 OP |
2685 | |
2686 | if (left > PAGE_SIZE - 1) | |
2687 | left = PAGE_SIZE - 1; | |
2688 | ||
70f6cbb6 AV |
2689 | p = kbuf = memdup_user_nul(buffer, left); |
2690 | if (IS_ERR(kbuf)) | |
2691 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
2692 | |
2693 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2694 | GFP_KERNEL); | |
2695 | if (!tmp_bitmap) { | |
70f6cbb6 | 2696 | kfree(kbuf); |
9f977fb7 OP |
2697 | return -ENOMEM; |
2698 | } | |
70f6cbb6 | 2699 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
2700 | while (!err && left) { |
2701 | unsigned long val_a, val_b; | |
2702 | bool neg; | |
2703 | ||
70f6cbb6 | 2704 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
2705 | sizeof(tr_a), &c); |
2706 | if (err) | |
2707 | break; | |
2708 | if (val_a >= bitmap_len || neg) { | |
2709 | err = -EINVAL; | |
2710 | break; | |
2711 | } | |
2712 | ||
2713 | val_b = val_a; | |
2714 | if (left) { | |
70f6cbb6 | 2715 | p++; |
9f977fb7 OP |
2716 | left--; |
2717 | } | |
2718 | ||
2719 | if (c == '-') { | |
70f6cbb6 | 2720 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
2721 | &neg, tr_b, sizeof(tr_b), |
2722 | &c); | |
2723 | if (err) | |
2724 | break; | |
2725 | if (val_b >= bitmap_len || neg || | |
2726 | val_a > val_b) { | |
2727 | err = -EINVAL; | |
2728 | break; | |
2729 | } | |
2730 | if (left) { | |
70f6cbb6 | 2731 | p++; |
9f977fb7 OP |
2732 | left--; |
2733 | } | |
2734 | } | |
2735 | ||
5a04cca6 | 2736 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 2737 | first = 0; |
70f6cbb6 | 2738 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 2739 | } |
70f6cbb6 | 2740 | kfree(kbuf); |
9f977fb7 OP |
2741 | } else { |
2742 | unsigned long bit_a, bit_b = 0; | |
2743 | ||
2744 | while (left) { | |
2745 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2746 | if (bit_a >= bitmap_len) | |
2747 | break; | |
2748 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2749 | bit_a + 1) - 1; | |
2750 | ||
2751 | if (!first) { | |
2752 | err = proc_put_char(&buffer, &left, ','); | |
2753 | if (err) | |
2754 | break; | |
2755 | } | |
2756 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2757 | if (err) | |
2758 | break; | |
2759 | if (bit_a != bit_b) { | |
2760 | err = proc_put_char(&buffer, &left, '-'); | |
2761 | if (err) | |
2762 | break; | |
2763 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2764 | if (err) | |
2765 | break; | |
2766 | } | |
2767 | ||
2768 | first = 0; bit_b++; | |
2769 | } | |
2770 | if (!err) | |
2771 | err = proc_put_char(&buffer, &left, '\n'); | |
2772 | } | |
2773 | ||
2774 | if (!err) { | |
2775 | if (write) { | |
2776 | if (*ppos) | |
2777 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2778 | else | |
5a04cca6 | 2779 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2780 | } |
2781 | kfree(tmp_bitmap); | |
2782 | *lenp -= left; | |
2783 | *ppos += *lenp; | |
2784 | return 0; | |
2785 | } else { | |
2786 | kfree(tmp_bitmap); | |
2787 | return err; | |
2788 | } | |
2789 | } | |
2790 | ||
55610500 | 2791 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2792 | |
8d65af78 | 2793 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2794 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2795 | { | |
2796 | return -ENOSYS; | |
2797 | } | |
2798 | ||
8d65af78 | 2799 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2800 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2801 | { |
2802 | return -ENOSYS; | |
2803 | } | |
2804 | ||
8d65af78 | 2805 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2806 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2807 | { | |
2808 | return -ENOSYS; | |
2809 | } | |
2810 | ||
8d65af78 | 2811 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2812 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2813 | { | |
2814 | return -ENOSYS; | |
2815 | } | |
2816 | ||
8d65af78 | 2817 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2818 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2819 | { | |
2820 | return -ENOSYS; | |
2821 | } | |
2822 | ||
8d65af78 | 2823 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2824 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2825 | { | |
2826 | return -ENOSYS; | |
2827 | } | |
2828 | ||
8d65af78 | 2829 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2830 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2831 | { | |
2832 | return -ENOSYS; | |
2833 | } | |
2834 | ||
d8217f07 | 2835 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2836 | void __user *buffer, |
2837 | size_t *lenp, loff_t *ppos) | |
2838 | { | |
2839 | return -ENOSYS; | |
2840 | } | |
2841 | ||
2842 | ||
55610500 | 2843 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2844 | |
1da177e4 LT |
2845 | /* |
2846 | * No sense putting this after each symbol definition, twice, | |
2847 | * exception granted :-) | |
2848 | */ | |
2849 | EXPORT_SYMBOL(proc_dointvec); | |
2850 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2851 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2852 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2853 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2854 | EXPORT_SYMBOL(proc_dostring); | |
2855 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2856 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |