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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 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
5a04cca6 | 26 | #include <linux/bitmap.h> |
d33ed52d | 27 | #include <linux/signal.h> |
455cd5ab | 28 | #include <linux/printk.h> |
1da177e4 | 29 | #include <linux/proc_fs.h> |
72c2d582 | 30 | #include <linux/security.h> |
1da177e4 | 31 | #include <linux/ctype.h> |
dfec072e | 32 | #include <linux/kmemcheck.h> |
fd4b616b | 33 | #include <linux/kmemleak.h> |
62239ac2 | 34 | #include <linux/fs.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | #include <linux/kernel.h> | |
0296b228 | 37 | #include <linux/kobject.h> |
20380731 | 38 | #include <linux/net.h> |
1da177e4 LT |
39 | #include <linux/sysrq.h> |
40 | #include <linux/highuid.h> | |
41 | #include <linux/writeback.h> | |
3fff4c42 | 42 | #include <linux/ratelimit.h> |
76ab0f53 | 43 | #include <linux/compaction.h> |
1da177e4 | 44 | #include <linux/hugetlb.h> |
1da177e4 | 45 | #include <linux/initrd.h> |
0b77f5bf | 46 | #include <linux/key.h> |
1da177e4 LT |
47 | #include <linux/times.h> |
48 | #include <linux/limits.h> | |
49 | #include <linux/dcache.h> | |
6e006701 | 50 | #include <linux/dnotify.h> |
1da177e4 | 51 | #include <linux/syscalls.h> |
c748e134 | 52 | #include <linux/vmstat.h> |
c255d844 PM |
53 | #include <linux/nfs_fs.h> |
54 | #include <linux/acpi.h> | |
10a0a8d4 | 55 | #include <linux/reboot.h> |
b0fc494f | 56 | #include <linux/ftrace.h> |
cdd6c482 | 57 | #include <linux/perf_event.h> |
b2be84df | 58 | #include <linux/kprobes.h> |
b492e95b | 59 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 60 | #include <linux/oom.h> |
17f60a7d | 61 | #include <linux/kmod.h> |
73efc039 | 62 | #include <linux/capability.h> |
40401530 | 63 | #include <linux/binfmts.h> |
cf4aebc2 | 64 | #include <linux/sched/sysctl.h> |
7984754b | 65 | #include <linux/kexec.h> |
1da177e4 LT |
66 | |
67 | #include <asm/uaccess.h> | |
68 | #include <asm/processor.h> | |
69 | ||
29cbc78b AK |
70 | #ifdef CONFIG_X86 |
71 | #include <asm/nmi.h> | |
0741f4d2 | 72 | #include <asm/stacktrace.h> |
6e7c4025 | 73 | #include <asm/io.h> |
29cbc78b | 74 | #endif |
d550bbd4 DH |
75 | #ifdef CONFIG_SPARC |
76 | #include <asm/setup.h> | |
77 | #endif | |
c55b7c3e DY |
78 | #ifdef CONFIG_BSD_PROCESS_ACCT |
79 | #include <linux/acct.h> | |
80 | #endif | |
4f0e056f DY |
81 | #ifdef CONFIG_RT_MUTEXES |
82 | #include <linux/rtmutex.h> | |
83 | #endif | |
2edf5e49 DY |
84 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
85 | #include <linux/lockdep.h> | |
86 | #endif | |
15485a46 DY |
87 | #ifdef CONFIG_CHR_DEV_SG |
88 | #include <scsi/sg.h> | |
89 | #endif | |
29cbc78b | 90 | |
58687acb | 91 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
92 | #include <linux/nmi.h> |
93 | #endif | |
94 | ||
7058cb02 | 95 | |
1da177e4 LT |
96 | #if defined(CONFIG_SYSCTL) |
97 | ||
98 | /* External variables not in a header file. */ | |
1da177e4 | 99 | extern int max_threads; |
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 | ||
176 | static int sysctl_writes_strict = SYSCTL_WRITES_WARN; | |
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 | }, | |
cd1bb94b | 353 | { |
cd1bb94b AB |
354 | .procname = "timer_migration", |
355 | .data = &sysctl_timer_migration, | |
356 | .maxlen = sizeof(unsigned int), | |
357 | .mode = 0644, | |
6d456111 | 358 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
359 | .extra1 = &zero, |
360 | .extra2 = &one, | |
fa85ae24 | 361 | }, |
cbee9f88 PZ |
362 | #endif /* CONFIG_SMP */ |
363 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
364 | { |
365 | .procname = "numa_balancing_scan_delay_ms", | |
366 | .data = &sysctl_numa_balancing_scan_delay, | |
367 | .maxlen = sizeof(unsigned int), | |
368 | .mode = 0644, | |
369 | .proc_handler = proc_dointvec, | |
370 | }, | |
cbee9f88 PZ |
371 | { |
372 | .procname = "numa_balancing_scan_period_min_ms", | |
373 | .data = &sysctl_numa_balancing_scan_period_min, | |
374 | .maxlen = sizeof(unsigned int), | |
375 | .mode = 0644, | |
376 | .proc_handler = proc_dointvec, | |
377 | }, | |
378 | { | |
379 | .procname = "numa_balancing_scan_period_max_ms", | |
380 | .data = &sysctl_numa_balancing_scan_period_max, | |
381 | .maxlen = sizeof(unsigned int), | |
382 | .mode = 0644, | |
383 | .proc_handler = proc_dointvec, | |
384 | }, | |
6e5fb223 PZ |
385 | { |
386 | .procname = "numa_balancing_scan_size_mb", | |
387 | .data = &sysctl_numa_balancing_scan_size, | |
388 | .maxlen = sizeof(unsigned int), | |
389 | .mode = 0644, | |
64192658 KT |
390 | .proc_handler = proc_dointvec_minmax, |
391 | .extra1 = &one, | |
6e5fb223 | 392 | }, |
54a43d54 AK |
393 | { |
394 | .procname = "numa_balancing", | |
395 | .data = NULL, /* filled in by handler */ | |
396 | .maxlen = sizeof(unsigned int), | |
397 | .mode = 0644, | |
398 | .proc_handler = sysctl_numa_balancing, | |
399 | .extra1 = &zero, | |
400 | .extra2 = &one, | |
401 | }, | |
cbee9f88 PZ |
402 | #endif /* CONFIG_NUMA_BALANCING */ |
403 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 404 | { |
9f0c1e56 PZ |
405 | .procname = "sched_rt_period_us", |
406 | .data = &sysctl_sched_rt_period, | |
407 | .maxlen = sizeof(unsigned int), | |
408 | .mode = 0644, | |
6d456111 | 409 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
410 | }, |
411 | { | |
9f0c1e56 PZ |
412 | .procname = "sched_rt_runtime_us", |
413 | .data = &sysctl_sched_rt_runtime, | |
414 | .maxlen = sizeof(int), | |
415 | .mode = 0644, | |
6d456111 | 416 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 417 | }, |
ce0dbbbb CW |
418 | { |
419 | .procname = "sched_rr_timeslice_ms", | |
420 | .data = &sched_rr_timeslice, | |
421 | .maxlen = sizeof(int), | |
422 | .mode = 0644, | |
423 | .proc_handler = sched_rr_handler, | |
424 | }, | |
5091faa4 MG |
425 | #ifdef CONFIG_SCHED_AUTOGROUP |
426 | { | |
427 | .procname = "sched_autogroup_enabled", | |
428 | .data = &sysctl_sched_autogroup_enabled, | |
429 | .maxlen = sizeof(unsigned int), | |
430 | .mode = 0644, | |
1747b21f | 431 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
432 | .extra1 = &zero, |
433 | .extra2 = &one, | |
434 | }, | |
435 | #endif | |
ec12cb7f PT |
436 | #ifdef CONFIG_CFS_BANDWIDTH |
437 | { | |
438 | .procname = "sched_cfs_bandwidth_slice_us", | |
439 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
440 | .maxlen = sizeof(unsigned int), | |
441 | .mode = 0644, | |
442 | .proc_handler = proc_dointvec_minmax, | |
443 | .extra1 = &one, | |
444 | }, | |
445 | #endif | |
f20786ff PZ |
446 | #ifdef CONFIG_PROVE_LOCKING |
447 | { | |
f20786ff PZ |
448 | .procname = "prove_locking", |
449 | .data = &prove_locking, | |
450 | .maxlen = sizeof(int), | |
451 | .mode = 0644, | |
6d456111 | 452 | .proc_handler = proc_dointvec, |
f20786ff PZ |
453 | }, |
454 | #endif | |
455 | #ifdef CONFIG_LOCK_STAT | |
456 | { | |
f20786ff PZ |
457 | .procname = "lock_stat", |
458 | .data = &lock_stat, | |
459 | .maxlen = sizeof(int), | |
460 | .mode = 0644, | |
6d456111 | 461 | .proc_handler = proc_dointvec, |
f20786ff | 462 | }, |
77e54a1f | 463 | #endif |
1da177e4 | 464 | { |
1da177e4 LT |
465 | .procname = "panic", |
466 | .data = &panic_timeout, | |
467 | .maxlen = sizeof(int), | |
468 | .mode = 0644, | |
6d456111 | 469 | .proc_handler = proc_dointvec, |
1da177e4 | 470 | }, |
046d662f | 471 | #ifdef CONFIG_COREDUMP |
1da177e4 | 472 | { |
1da177e4 LT |
473 | .procname = "core_uses_pid", |
474 | .data = &core_uses_pid, | |
475 | .maxlen = sizeof(int), | |
476 | .mode = 0644, | |
6d456111 | 477 | .proc_handler = proc_dointvec, |
1da177e4 LT |
478 | }, |
479 | { | |
1da177e4 LT |
480 | .procname = "core_pattern", |
481 | .data = core_pattern, | |
71ce92f3 | 482 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 483 | .mode = 0644, |
54b50199 | 484 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 485 | }, |
a293980c | 486 | { |
a293980c NH |
487 | .procname = "core_pipe_limit", |
488 | .data = &core_pipe_limit, | |
489 | .maxlen = sizeof(unsigned int), | |
490 | .mode = 0644, | |
6d456111 | 491 | .proc_handler = proc_dointvec, |
a293980c | 492 | }, |
046d662f | 493 | #endif |
34f5a398 | 494 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 495 | { |
1da177e4 | 496 | .procname = "tainted", |
25ddbb18 | 497 | .maxlen = sizeof(long), |
34f5a398 | 498 | .mode = 0644, |
6d456111 | 499 | .proc_handler = proc_taint, |
1da177e4 | 500 | }, |
f4aacea2 KC |
501 | { |
502 | .procname = "sysctl_writes_strict", | |
503 | .data = &sysctl_writes_strict, | |
504 | .maxlen = sizeof(int), | |
505 | .mode = 0644, | |
506 | .proc_handler = proc_dointvec_minmax, | |
507 | .extra1 = &neg_one, | |
508 | .extra2 = &one, | |
509 | }, | |
34f5a398 | 510 | #endif |
9745512c AV |
511 | #ifdef CONFIG_LATENCYTOP |
512 | { | |
513 | .procname = "latencytop", | |
514 | .data = &latencytop_enabled, | |
515 | .maxlen = sizeof(int), | |
516 | .mode = 0644, | |
6d456111 | 517 | .proc_handler = proc_dointvec, |
9745512c AV |
518 | }, |
519 | #endif | |
1da177e4 LT |
520 | #ifdef CONFIG_BLK_DEV_INITRD |
521 | { | |
1da177e4 LT |
522 | .procname = "real-root-dev", |
523 | .data = &real_root_dev, | |
524 | .maxlen = sizeof(int), | |
525 | .mode = 0644, | |
6d456111 | 526 | .proc_handler = proc_dointvec, |
1da177e4 LT |
527 | }, |
528 | #endif | |
45807a1d | 529 | { |
45807a1d IM |
530 | .procname = "print-fatal-signals", |
531 | .data = &print_fatal_signals, | |
532 | .maxlen = sizeof(int), | |
533 | .mode = 0644, | |
6d456111 | 534 | .proc_handler = proc_dointvec, |
45807a1d | 535 | }, |
72c57ed5 | 536 | #ifdef CONFIG_SPARC |
1da177e4 | 537 | { |
1da177e4 LT |
538 | .procname = "reboot-cmd", |
539 | .data = reboot_command, | |
540 | .maxlen = 256, | |
541 | .mode = 0644, | |
6d456111 | 542 | .proc_handler = proc_dostring, |
1da177e4 LT |
543 | }, |
544 | { | |
1da177e4 LT |
545 | .procname = "stop-a", |
546 | .data = &stop_a_enabled, | |
547 | .maxlen = sizeof (int), | |
548 | .mode = 0644, | |
6d456111 | 549 | .proc_handler = proc_dointvec, |
1da177e4 LT |
550 | }, |
551 | { | |
1da177e4 LT |
552 | .procname = "scons-poweroff", |
553 | .data = &scons_pwroff, | |
554 | .maxlen = sizeof (int), | |
555 | .mode = 0644, | |
6d456111 | 556 | .proc_handler = proc_dointvec, |
1da177e4 LT |
557 | }, |
558 | #endif | |
0871420f DM |
559 | #ifdef CONFIG_SPARC64 |
560 | { | |
0871420f DM |
561 | .procname = "tsb-ratio", |
562 | .data = &sysctl_tsb_ratio, | |
563 | .maxlen = sizeof (int), | |
564 | .mode = 0644, | |
6d456111 | 565 | .proc_handler = proc_dointvec, |
0871420f DM |
566 | }, |
567 | #endif | |
1da177e4 LT |
568 | #ifdef __hppa__ |
569 | { | |
1da177e4 LT |
570 | .procname = "soft-power", |
571 | .data = &pwrsw_enabled, | |
572 | .maxlen = sizeof (int), | |
573 | .mode = 0644, | |
6d456111 | 574 | .proc_handler = proc_dointvec, |
1da177e4 | 575 | }, |
bf14e3b9 VG |
576 | #endif |
577 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 578 | { |
1da177e4 LT |
579 | .procname = "unaligned-trap", |
580 | .data = &unaligned_enabled, | |
581 | .maxlen = sizeof (int), | |
582 | .mode = 0644, | |
6d456111 | 583 | .proc_handler = proc_dointvec, |
1da177e4 LT |
584 | }, |
585 | #endif | |
586 | { | |
1da177e4 LT |
587 | .procname = "ctrl-alt-del", |
588 | .data = &C_A_D, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
6d456111 | 591 | .proc_handler = proc_dointvec, |
1da177e4 | 592 | }, |
606576ce | 593 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 594 | { |
b0fc494f SR |
595 | .procname = "ftrace_enabled", |
596 | .data = &ftrace_enabled, | |
597 | .maxlen = sizeof(int), | |
598 | .mode = 0644, | |
6d456111 | 599 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
600 | }, |
601 | #endif | |
f38f1d2a SR |
602 | #ifdef CONFIG_STACK_TRACER |
603 | { | |
f38f1d2a SR |
604 | .procname = "stack_tracer_enabled", |
605 | .data = &stack_tracer_enabled, | |
606 | .maxlen = sizeof(int), | |
607 | .mode = 0644, | |
6d456111 | 608 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
609 | }, |
610 | #endif | |
944ac425 SR |
611 | #ifdef CONFIG_TRACING |
612 | { | |
3299b4dd | 613 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
614 | .data = &ftrace_dump_on_oops, |
615 | .maxlen = sizeof(int), | |
616 | .mode = 0644, | |
6d456111 | 617 | .proc_handler = proc_dointvec, |
944ac425 | 618 | }, |
de7edd31 SRRH |
619 | { |
620 | .procname = "traceoff_on_warning", | |
621 | .data = &__disable_trace_on_warning, | |
622 | .maxlen = sizeof(__disable_trace_on_warning), | |
623 | .mode = 0644, | |
624 | .proc_handler = proc_dointvec, | |
625 | }, | |
944ac425 | 626 | #endif |
7984754b KC |
627 | #ifdef CONFIG_KEXEC |
628 | { | |
629 | .procname = "kexec_load_disabled", | |
630 | .data = &kexec_load_disabled, | |
631 | .maxlen = sizeof(int), | |
632 | .mode = 0644, | |
633 | /* only handle a transition from default "0" to "1" */ | |
634 | .proc_handler = proc_dointvec_minmax, | |
635 | .extra1 = &one, | |
636 | .extra2 = &one, | |
637 | }, | |
638 | #endif | |
a1ef5adb | 639 | #ifdef CONFIG_MODULES |
1da177e4 | 640 | { |
1da177e4 LT |
641 | .procname = "modprobe", |
642 | .data = &modprobe_path, | |
643 | .maxlen = KMOD_PATH_LEN, | |
644 | .mode = 0644, | |
6d456111 | 645 | .proc_handler = proc_dostring, |
1da177e4 | 646 | }, |
3d43321b | 647 | { |
3d43321b KC |
648 | .procname = "modules_disabled", |
649 | .data = &modules_disabled, | |
650 | .maxlen = sizeof(int), | |
651 | .mode = 0644, | |
652 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 653 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
654 | .extra1 = &one, |
655 | .extra2 = &one, | |
656 | }, | |
1da177e4 | 657 | #endif |
86d56134 | 658 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 659 | { |
1da177e4 | 660 | .procname = "hotplug", |
312c004d KS |
661 | .data = &uevent_helper, |
662 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 663 | .mode = 0644, |
6d456111 | 664 | .proc_handler = proc_dostring, |
1da177e4 | 665 | }, |
86d56134 | 666 | #endif |
1da177e4 LT |
667 | #ifdef CONFIG_CHR_DEV_SG |
668 | { | |
1da177e4 LT |
669 | .procname = "sg-big-buff", |
670 | .data = &sg_big_buff, | |
671 | .maxlen = sizeof (int), | |
672 | .mode = 0444, | |
6d456111 | 673 | .proc_handler = proc_dointvec, |
1da177e4 LT |
674 | }, |
675 | #endif | |
676 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
677 | { | |
1da177e4 LT |
678 | .procname = "acct", |
679 | .data = &acct_parm, | |
680 | .maxlen = 3*sizeof(int), | |
681 | .mode = 0644, | |
6d456111 | 682 | .proc_handler = proc_dointvec, |
1da177e4 LT |
683 | }, |
684 | #endif | |
1da177e4 LT |
685 | #ifdef CONFIG_MAGIC_SYSRQ |
686 | { | |
1da177e4 | 687 | .procname = "sysrq", |
5d6f647f | 688 | .data = &__sysrq_enabled, |
1da177e4 LT |
689 | .maxlen = sizeof (int), |
690 | .mode = 0644, | |
97f5f0cd | 691 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
692 | }, |
693 | #endif | |
d6f8ff73 | 694 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 695 | { |
1da177e4 | 696 | .procname = "cad_pid", |
9ec52099 | 697 | .data = NULL, |
1da177e4 LT |
698 | .maxlen = sizeof (int), |
699 | .mode = 0600, | |
6d456111 | 700 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 701 | }, |
d6f8ff73 | 702 | #endif |
1da177e4 | 703 | { |
1da177e4 LT |
704 | .procname = "threads-max", |
705 | .data = &max_threads, | |
706 | .maxlen = sizeof(int), | |
707 | .mode = 0644, | |
6d456111 | 708 | .proc_handler = proc_dointvec, |
1da177e4 LT |
709 | }, |
710 | { | |
1da177e4 LT |
711 | .procname = "random", |
712 | .mode = 0555, | |
713 | .child = random_table, | |
714 | }, | |
17f60a7d EP |
715 | { |
716 | .procname = "usermodehelper", | |
717 | .mode = 0555, | |
718 | .child = usermodehelper_table, | |
719 | }, | |
1da177e4 | 720 | { |
1da177e4 LT |
721 | .procname = "overflowuid", |
722 | .data = &overflowuid, | |
723 | .maxlen = sizeof(int), | |
724 | .mode = 0644, | |
6d456111 | 725 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
726 | .extra1 = &minolduid, |
727 | .extra2 = &maxolduid, | |
728 | }, | |
729 | { | |
1da177e4 LT |
730 | .procname = "overflowgid", |
731 | .data = &overflowgid, | |
732 | .maxlen = sizeof(int), | |
733 | .mode = 0644, | |
6d456111 | 734 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
735 | .extra1 = &minolduid, |
736 | .extra2 = &maxolduid, | |
737 | }, | |
347a8dc3 | 738 | #ifdef CONFIG_S390 |
1da177e4 LT |
739 | #ifdef CONFIG_MATHEMU |
740 | { | |
1da177e4 LT |
741 | .procname = "ieee_emulation_warnings", |
742 | .data = &sysctl_ieee_emulation_warnings, | |
743 | .maxlen = sizeof(int), | |
744 | .mode = 0644, | |
6d456111 | 745 | .proc_handler = proc_dointvec, |
1da177e4 | 746 | }, |
1da177e4 LT |
747 | #endif |
748 | { | |
1da177e4 | 749 | .procname = "userprocess_debug", |
ab3c68ee | 750 | .data = &show_unhandled_signals, |
1da177e4 LT |
751 | .maxlen = sizeof(int), |
752 | .mode = 0644, | |
6d456111 | 753 | .proc_handler = proc_dointvec, |
1da177e4 LT |
754 | }, |
755 | #endif | |
756 | { | |
1da177e4 LT |
757 | .procname = "pid_max", |
758 | .data = &pid_max, | |
759 | .maxlen = sizeof (int), | |
760 | .mode = 0644, | |
6d456111 | 761 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
762 | .extra1 = &pid_max_min, |
763 | .extra2 = &pid_max_max, | |
764 | }, | |
765 | { | |
1da177e4 LT |
766 | .procname = "panic_on_oops", |
767 | .data = &panic_on_oops, | |
768 | .maxlen = sizeof(int), | |
769 | .mode = 0644, | |
6d456111 | 770 | .proc_handler = proc_dointvec, |
1da177e4 | 771 | }, |
7ef3d2fd JP |
772 | #if defined CONFIG_PRINTK |
773 | { | |
7ef3d2fd JP |
774 | .procname = "printk", |
775 | .data = &console_loglevel, | |
776 | .maxlen = 4*sizeof(int), | |
777 | .mode = 0644, | |
6d456111 | 778 | .proc_handler = proc_dointvec, |
7ef3d2fd | 779 | }, |
1da177e4 | 780 | { |
1da177e4 | 781 | .procname = "printk_ratelimit", |
717115e1 | 782 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
783 | .maxlen = sizeof(int), |
784 | .mode = 0644, | |
6d456111 | 785 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
786 | }, |
787 | { | |
1da177e4 | 788 | .procname = "printk_ratelimit_burst", |
717115e1 | 789 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
790 | .maxlen = sizeof(int), |
791 | .mode = 0644, | |
6d456111 | 792 | .proc_handler = proc_dointvec, |
1da177e4 | 793 | }, |
af91322e | 794 | { |
af91322e DY |
795 | .procname = "printk_delay", |
796 | .data = &printk_delay_msec, | |
797 | .maxlen = sizeof(int), | |
798 | .mode = 0644, | |
6d456111 | 799 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
800 | .extra1 = &zero, |
801 | .extra2 = &ten_thousand, | |
802 | }, | |
eaf06b24 DR |
803 | { |
804 | .procname = "dmesg_restrict", | |
805 | .data = &dmesg_restrict, | |
806 | .maxlen = sizeof(int), | |
807 | .mode = 0644, | |
620f6e8e | 808 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
809 | .extra1 = &zero, |
810 | .extra2 = &one, | |
811 | }, | |
455cd5ab DR |
812 | { |
813 | .procname = "kptr_restrict", | |
814 | .data = &kptr_restrict, | |
815 | .maxlen = sizeof(int), | |
816 | .mode = 0644, | |
620f6e8e | 817 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
818 | .extra1 = &zero, |
819 | .extra2 = &two, | |
820 | }, | |
df6e61d4 | 821 | #endif |
1da177e4 | 822 | { |
1da177e4 LT |
823 | .procname = "ngroups_max", |
824 | .data = &ngroups_max, | |
825 | .maxlen = sizeof (int), | |
826 | .mode = 0444, | |
6d456111 | 827 | .proc_handler = proc_dointvec, |
1da177e4 | 828 | }, |
73efc039 DB |
829 | { |
830 | .procname = "cap_last_cap", | |
831 | .data = (void *)&cap_last_cap, | |
832 | .maxlen = sizeof(int), | |
833 | .mode = 0444, | |
834 | .proc_handler = proc_dointvec, | |
835 | }, | |
58687acb | 836 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 837 | { |
58687acb | 838 | .procname = "watchdog", |
3c00ea82 | 839 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
840 | .maxlen = sizeof (int), |
841 | .mode = 0644, | |
586692a5 MSB |
842 | .proc_handler = proc_dowatchdog, |
843 | .extra1 = &zero, | |
844 | .extra2 = &one, | |
58687acb DZ |
845 | }, |
846 | { | |
847 | .procname = "watchdog_thresh", | |
586692a5 | 848 | .data = &watchdog_thresh, |
58687acb DZ |
849 | .maxlen = sizeof(int), |
850 | .mode = 0644, | |
586692a5 | 851 | .proc_handler = proc_dowatchdog, |
a6572f84 | 852 | .extra1 = &zero, |
58687acb | 853 | .extra2 = &sixty, |
504d7cf1 | 854 | }, |
2508ce18 DZ |
855 | { |
856 | .procname = "softlockup_panic", | |
857 | .data = &softlockup_panic, | |
858 | .maxlen = sizeof(int), | |
859 | .mode = 0644, | |
860 | .proc_handler = proc_dointvec_minmax, | |
861 | .extra1 = &zero, | |
862 | .extra2 = &one, | |
863 | }, | |
ed235875 AT |
864 | #ifdef CONFIG_SMP |
865 | { | |
866 | .procname = "softlockup_all_cpu_backtrace", | |
867 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
868 | .maxlen = sizeof(int), | |
869 | .mode = 0644, | |
870 | .proc_handler = proc_dointvec_minmax, | |
871 | .extra1 = &zero, | |
872 | .extra2 = &one, | |
873 | }, | |
874 | #endif /* CONFIG_SMP */ | |
5dc30558 DZ |
875 | { |
876 | .procname = "nmi_watchdog", | |
3c00ea82 | 877 | .data = &watchdog_user_enabled, |
5dc30558 DZ |
878 | .maxlen = sizeof (int), |
879 | .mode = 0644, | |
586692a5 MSB |
880 | .proc_handler = proc_dowatchdog, |
881 | .extra1 = &zero, | |
882 | .extra2 = &one, | |
5dc30558 DZ |
883 | }, |
884 | #endif | |
885 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
886 | { | |
887 | .procname = "unknown_nmi_panic", | |
888 | .data = &unknown_nmi_panic, | |
889 | .maxlen = sizeof (int), | |
890 | .mode = 0644, | |
891 | .proc_handler = proc_dointvec, | |
892 | }, | |
504d7cf1 | 893 | #endif |
1da177e4 | 894 | #if defined(CONFIG_X86) |
8da5adda | 895 | { |
8da5adda DZ |
896 | .procname = "panic_on_unrecovered_nmi", |
897 | .data = &panic_on_unrecovered_nmi, | |
898 | .maxlen = sizeof(int), | |
899 | .mode = 0644, | |
6d456111 | 900 | .proc_handler = proc_dointvec, |
8da5adda | 901 | }, |
5211a242 | 902 | { |
5211a242 KG |
903 | .procname = "panic_on_io_nmi", |
904 | .data = &panic_on_io_nmi, | |
905 | .maxlen = sizeof(int), | |
906 | .mode = 0644, | |
6d456111 | 907 | .proc_handler = proc_dointvec, |
5211a242 | 908 | }, |
55af7796 MH |
909 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
910 | { | |
911 | .procname = "panic_on_stackoverflow", | |
912 | .data = &sysctl_panic_on_stackoverflow, | |
913 | .maxlen = sizeof(int), | |
914 | .mode = 0644, | |
915 | .proc_handler = proc_dointvec, | |
916 | }, | |
917 | #endif | |
1da177e4 | 918 | { |
1da177e4 LT |
919 | .procname = "bootloader_type", |
920 | .data = &bootloader_type, | |
921 | .maxlen = sizeof (int), | |
922 | .mode = 0444, | |
6d456111 | 923 | .proc_handler = proc_dointvec, |
1da177e4 | 924 | }, |
5031296c | 925 | { |
5031296c PA |
926 | .procname = "bootloader_version", |
927 | .data = &bootloader_version, | |
928 | .maxlen = sizeof (int), | |
929 | .mode = 0444, | |
6d456111 | 930 | .proc_handler = proc_dointvec, |
5031296c | 931 | }, |
0741f4d2 | 932 | { |
0741f4d2 CE |
933 | .procname = "kstack_depth_to_print", |
934 | .data = &kstack_depth_to_print, | |
935 | .maxlen = sizeof(int), | |
936 | .mode = 0644, | |
6d456111 | 937 | .proc_handler = proc_dointvec, |
0741f4d2 | 938 | }, |
6e7c4025 | 939 | { |
6e7c4025 IM |
940 | .procname = "io_delay_type", |
941 | .data = &io_delay_type, | |
942 | .maxlen = sizeof(int), | |
943 | .mode = 0644, | |
6d456111 | 944 | .proc_handler = proc_dointvec, |
6e7c4025 | 945 | }, |
1da177e4 | 946 | #endif |
7a9166e3 | 947 | #if defined(CONFIG_MMU) |
1da177e4 | 948 | { |
1da177e4 LT |
949 | .procname = "randomize_va_space", |
950 | .data = &randomize_va_space, | |
951 | .maxlen = sizeof(int), | |
952 | .mode = 0644, | |
6d456111 | 953 | .proc_handler = proc_dointvec, |
1da177e4 | 954 | }, |
7a9166e3 | 955 | #endif |
0152fb37 | 956 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 957 | { |
951f22d5 MS |
958 | .procname = "spin_retry", |
959 | .data = &spin_retry, | |
960 | .maxlen = sizeof (int), | |
961 | .mode = 0644, | |
6d456111 | 962 | .proc_handler = proc_dointvec, |
951f22d5 | 963 | }, |
c255d844 | 964 | #endif |
673d5b43 | 965 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 966 | { |
c255d844 | 967 | .procname = "acpi_video_flags", |
77afcf78 | 968 | .data = &acpi_realmode_flags, |
c255d844 PM |
969 | .maxlen = sizeof (unsigned long), |
970 | .mode = 0644, | |
6d456111 | 971 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 972 | }, |
d2b176ed | 973 | #endif |
b6fca725 | 974 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 975 | { |
d2b176ed JS |
976 | .procname = "ignore-unaligned-usertrap", |
977 | .data = &no_unaligned_warning, | |
978 | .maxlen = sizeof (int), | |
979 | .mode = 0644, | |
6d456111 | 980 | .proc_handler = proc_dointvec, |
d2b176ed | 981 | }, |
b6fca725 VG |
982 | #endif |
983 | #ifdef CONFIG_IA64 | |
88fc241f | 984 | { |
88fc241f DC |
985 | .procname = "unaligned-dump-stack", |
986 | .data = &unaligned_dump_stack, | |
987 | .maxlen = sizeof (int), | |
988 | .mode = 0644, | |
6d456111 | 989 | .proc_handler = proc_dointvec, |
88fc241f | 990 | }, |
bebfa101 | 991 | #endif |
e162b39a MSB |
992 | #ifdef CONFIG_DETECT_HUNG_TASK |
993 | { | |
e162b39a MSB |
994 | .procname = "hung_task_panic", |
995 | .data = &sysctl_hung_task_panic, | |
996 | .maxlen = sizeof(int), | |
997 | .mode = 0644, | |
6d456111 | 998 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
999 | .extra1 = &zero, |
1000 | .extra2 = &one, | |
1001 | }, | |
82a1fcb9 | 1002 | { |
82a1fcb9 IM |
1003 | .procname = "hung_task_check_count", |
1004 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1005 | .maxlen = sizeof(int), |
82a1fcb9 | 1006 | .mode = 0644, |
cd64647f LZ |
1007 | .proc_handler = proc_dointvec_minmax, |
1008 | .extra1 = &zero, | |
82a1fcb9 IM |
1009 | }, |
1010 | { | |
82a1fcb9 IM |
1011 | .procname = "hung_task_timeout_secs", |
1012 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1013 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1014 | .mode = 0644, |
6d456111 | 1015 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1016 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1017 | }, |
1018 | { | |
82a1fcb9 IM |
1019 | .procname = "hung_task_warnings", |
1020 | .data = &sysctl_hung_task_warnings, | |
270750db | 1021 | .maxlen = sizeof(int), |
82a1fcb9 | 1022 | .mode = 0644, |
270750db AT |
1023 | .proc_handler = proc_dointvec_minmax, |
1024 | .extra1 = &neg_one, | |
82a1fcb9 | 1025 | }, |
c4f3b63f | 1026 | #endif |
bebfa101 AK |
1027 | #ifdef CONFIG_COMPAT |
1028 | { | |
bebfa101 AK |
1029 | .procname = "compat-log", |
1030 | .data = &compat_log, | |
1031 | .maxlen = sizeof (int), | |
1032 | .mode = 0644, | |
6d456111 | 1033 | .proc_handler = proc_dointvec, |
bebfa101 | 1034 | }, |
951f22d5 | 1035 | #endif |
23f78d4a IM |
1036 | #ifdef CONFIG_RT_MUTEXES |
1037 | { | |
23f78d4a IM |
1038 | .procname = "max_lock_depth", |
1039 | .data = &max_lock_depth, | |
1040 | .maxlen = sizeof(int), | |
1041 | .mode = 0644, | |
6d456111 | 1042 | .proc_handler = proc_dointvec, |
23f78d4a | 1043 | }, |
5096add8 | 1044 | #endif |
10a0a8d4 | 1045 | { |
10a0a8d4 JF |
1046 | .procname = "poweroff_cmd", |
1047 | .data = &poweroff_cmd, | |
1048 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1049 | .mode = 0644, | |
6d456111 | 1050 | .proc_handler = proc_dostring, |
10a0a8d4 | 1051 | }, |
0b77f5bf DH |
1052 | #ifdef CONFIG_KEYS |
1053 | { | |
0b77f5bf DH |
1054 | .procname = "keys", |
1055 | .mode = 0555, | |
1056 | .child = key_sysctls, | |
1057 | }, | |
1058 | #endif | |
cdd6c482 | 1059 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1060 | /* |
1061 | * User-space scripts rely on the existence of this file | |
1062 | * as a feature check for perf_events being enabled. | |
1063 | * | |
1064 | * So it's an ABI, do not remove! | |
1065 | */ | |
1ccd1549 | 1066 | { |
cdd6c482 IM |
1067 | .procname = "perf_event_paranoid", |
1068 | .data = &sysctl_perf_event_paranoid, | |
1069 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1070 | .mode = 0644, |
6d456111 | 1071 | .proc_handler = proc_dointvec, |
1ccd1549 | 1072 | }, |
c5078f78 | 1073 | { |
cdd6c482 IM |
1074 | .procname = "perf_event_mlock_kb", |
1075 | .data = &sysctl_perf_event_mlock, | |
1076 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1077 | .mode = 0644, |
6d456111 | 1078 | .proc_handler = proc_dointvec, |
c5078f78 | 1079 | }, |
a78ac325 | 1080 | { |
cdd6c482 IM |
1081 | .procname = "perf_event_max_sample_rate", |
1082 | .data = &sysctl_perf_event_sample_rate, | |
1083 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1084 | .mode = 0644, |
163ec435 | 1085 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1086 | .extra1 = &one, |
a78ac325 | 1087 | }, |
14c63f17 DH |
1088 | { |
1089 | .procname = "perf_cpu_time_max_percent", | |
1090 | .data = &sysctl_perf_cpu_time_max_percent, | |
1091 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1092 | .mode = 0644, | |
1093 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1094 | .extra1 = &zero, | |
1095 | .extra2 = &one_hundred, | |
1096 | }, | |
1ccd1549 | 1097 | #endif |
dfec072e VN |
1098 | #ifdef CONFIG_KMEMCHECK |
1099 | { | |
dfec072e VN |
1100 | .procname = "kmemcheck", |
1101 | .data = &kmemcheck_enabled, | |
1102 | .maxlen = sizeof(int), | |
1103 | .mode = 0644, | |
6d456111 | 1104 | .proc_handler = proc_dointvec, |
dfec072e | 1105 | }, |
cb684b5b | 1106 | #endif |
6fce56ec | 1107 | { } |
1da177e4 LT |
1108 | }; |
1109 | ||
d8217f07 | 1110 | static struct ctl_table vm_table[] = { |
1da177e4 | 1111 | { |
1da177e4 LT |
1112 | .procname = "overcommit_memory", |
1113 | .data = &sysctl_overcommit_memory, | |
1114 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1115 | .mode = 0644, | |
cb16e95f PH |
1116 | .proc_handler = proc_dointvec_minmax, |
1117 | .extra1 = &zero, | |
1118 | .extra2 = &two, | |
1da177e4 | 1119 | }, |
fadd8fbd | 1120 | { |
fadd8fbd KH |
1121 | .procname = "panic_on_oom", |
1122 | .data = &sysctl_panic_on_oom, | |
1123 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1124 | .mode = 0644, | |
cb16e95f PH |
1125 | .proc_handler = proc_dointvec_minmax, |
1126 | .extra1 = &zero, | |
1127 | .extra2 = &two, | |
fadd8fbd | 1128 | }, |
fe071d7e | 1129 | { |
fe071d7e DR |
1130 | .procname = "oom_kill_allocating_task", |
1131 | .data = &sysctl_oom_kill_allocating_task, | |
1132 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1133 | .mode = 0644, | |
6d456111 | 1134 | .proc_handler = proc_dointvec, |
fe071d7e | 1135 | }, |
fef1bdd6 | 1136 | { |
fef1bdd6 DR |
1137 | .procname = "oom_dump_tasks", |
1138 | .data = &sysctl_oom_dump_tasks, | |
1139 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1140 | .mode = 0644, | |
6d456111 | 1141 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1142 | }, |
1da177e4 | 1143 | { |
1da177e4 LT |
1144 | .procname = "overcommit_ratio", |
1145 | .data = &sysctl_overcommit_ratio, | |
1146 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1147 | .mode = 0644, | |
49f0ce5f JM |
1148 | .proc_handler = overcommit_ratio_handler, |
1149 | }, | |
1150 | { | |
1151 | .procname = "overcommit_kbytes", | |
1152 | .data = &sysctl_overcommit_kbytes, | |
1153 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1154 | .mode = 0644, | |
1155 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1156 | }, |
1157 | { | |
1da177e4 LT |
1158 | .procname = "page-cluster", |
1159 | .data = &page_cluster, | |
1160 | .maxlen = sizeof(int), | |
1161 | .mode = 0644, | |
cb16e95f PH |
1162 | .proc_handler = proc_dointvec_minmax, |
1163 | .extra1 = &zero, | |
1da177e4 LT |
1164 | }, |
1165 | { | |
1da177e4 LT |
1166 | .procname = "dirty_background_ratio", |
1167 | .data = &dirty_background_ratio, | |
1168 | .maxlen = sizeof(dirty_background_ratio), | |
1169 | .mode = 0644, | |
6d456111 | 1170 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1171 | .extra1 = &zero, |
1172 | .extra2 = &one_hundred, | |
1173 | }, | |
2da02997 | 1174 | { |
2da02997 DR |
1175 | .procname = "dirty_background_bytes", |
1176 | .data = &dirty_background_bytes, | |
1177 | .maxlen = sizeof(dirty_background_bytes), | |
1178 | .mode = 0644, | |
6d456111 | 1179 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1180 | .extra1 = &one_ul, |
2da02997 | 1181 | }, |
1da177e4 | 1182 | { |
1da177e4 LT |
1183 | .procname = "dirty_ratio", |
1184 | .data = &vm_dirty_ratio, | |
1185 | .maxlen = sizeof(vm_dirty_ratio), | |
1186 | .mode = 0644, | |
6d456111 | 1187 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1188 | .extra1 = &zero, |
1189 | .extra2 = &one_hundred, | |
1190 | }, | |
2da02997 | 1191 | { |
2da02997 DR |
1192 | .procname = "dirty_bytes", |
1193 | .data = &vm_dirty_bytes, | |
1194 | .maxlen = sizeof(vm_dirty_bytes), | |
1195 | .mode = 0644, | |
6d456111 | 1196 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1197 | .extra1 = &dirty_bytes_min, |
2da02997 | 1198 | }, |
1da177e4 | 1199 | { |
1da177e4 | 1200 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1201 | .data = &dirty_writeback_interval, |
1202 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1203 | .mode = 0644, |
6d456111 | 1204 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1205 | }, |
1206 | { | |
1da177e4 | 1207 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1208 | .data = &dirty_expire_interval, |
1209 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1210 | .mode = 0644, |
cb16e95f PH |
1211 | .proc_handler = proc_dointvec_minmax, |
1212 | .extra1 = &zero, | |
1da177e4 LT |
1213 | }, |
1214 | { | |
3965c9ae WL |
1215 | .procname = "nr_pdflush_threads", |
1216 | .mode = 0444 /* read-only */, | |
1217 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1218 | }, |
1219 | { | |
1da177e4 LT |
1220 | .procname = "swappiness", |
1221 | .data = &vm_swappiness, | |
1222 | .maxlen = sizeof(vm_swappiness), | |
1223 | .mode = 0644, | |
6d456111 | 1224 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1225 | .extra1 = &zero, |
1226 | .extra2 = &one_hundred, | |
1227 | }, | |
1228 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1229 | { |
1da177e4 | 1230 | .procname = "nr_hugepages", |
e5ff2159 | 1231 | .data = NULL, |
1da177e4 LT |
1232 | .maxlen = sizeof(unsigned long), |
1233 | .mode = 0644, | |
6d456111 | 1234 | .proc_handler = hugetlb_sysctl_handler, |
ed4d4902 | 1235 | .extra1 = &zero, |
06808b08 LS |
1236 | }, |
1237 | #ifdef CONFIG_NUMA | |
1238 | { | |
1239 | .procname = "nr_hugepages_mempolicy", | |
1240 | .data = NULL, | |
1241 | .maxlen = sizeof(unsigned long), | |
1242 | .mode = 0644, | |
1243 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
ed4d4902 | 1244 | .extra1 = &zero, |
06808b08 LS |
1245 | }, |
1246 | #endif | |
1da177e4 | 1247 | { |
1da177e4 LT |
1248 | .procname = "hugetlb_shm_group", |
1249 | .data = &sysctl_hugetlb_shm_group, | |
1250 | .maxlen = sizeof(gid_t), | |
1251 | .mode = 0644, | |
6d456111 | 1252 | .proc_handler = proc_dointvec, |
1da177e4 | 1253 | }, |
396faf03 | 1254 | { |
396faf03 MG |
1255 | .procname = "hugepages_treat_as_movable", |
1256 | .data = &hugepages_treat_as_movable, | |
1257 | .maxlen = sizeof(int), | |
1258 | .mode = 0644, | |
86cdb465 | 1259 | .proc_handler = proc_dointvec, |
396faf03 | 1260 | }, |
d1c3fb1f | 1261 | { |
d1c3fb1f | 1262 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1263 | .data = NULL, |
1264 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1265 | .mode = 0644, |
6d456111 | 1266 | .proc_handler = hugetlb_overcommit_handler, |
ed4d4902 | 1267 | .extra1 = &zero, |
d1c3fb1f | 1268 | }, |
1da177e4 LT |
1269 | #endif |
1270 | { | |
1da177e4 LT |
1271 | .procname = "lowmem_reserve_ratio", |
1272 | .data = &sysctl_lowmem_reserve_ratio, | |
1273 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1274 | .mode = 0644, | |
6d456111 | 1275 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1276 | }, |
9d0243bc | 1277 | { |
9d0243bc AM |
1278 | .procname = "drop_caches", |
1279 | .data = &sysctl_drop_caches, | |
1280 | .maxlen = sizeof(int), | |
1281 | .mode = 0644, | |
1282 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1283 | .extra1 = &one, |
5509a5d2 | 1284 | .extra2 = &four, |
9d0243bc | 1285 | }, |
76ab0f53 MG |
1286 | #ifdef CONFIG_COMPACTION |
1287 | { | |
1288 | .procname = "compact_memory", | |
1289 | .data = &sysctl_compact_memory, | |
1290 | .maxlen = sizeof(int), | |
1291 | .mode = 0200, | |
1292 | .proc_handler = sysctl_compaction_handler, | |
1293 | }, | |
5e771905 MG |
1294 | { |
1295 | .procname = "extfrag_threshold", | |
1296 | .data = &sysctl_extfrag_threshold, | |
1297 | .maxlen = sizeof(int), | |
1298 | .mode = 0644, | |
1299 | .proc_handler = sysctl_extfrag_handler, | |
1300 | .extra1 = &min_extfrag_threshold, | |
1301 | .extra2 = &max_extfrag_threshold, | |
1302 | }, | |
1303 | ||
76ab0f53 | 1304 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1305 | { |
1da177e4 LT |
1306 | .procname = "min_free_kbytes", |
1307 | .data = &min_free_kbytes, | |
1308 | .maxlen = sizeof(min_free_kbytes), | |
1309 | .mode = 0644, | |
6d456111 | 1310 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1311 | .extra1 = &zero, |
1312 | }, | |
8ad4b1fb | 1313 | { |
8ad4b1fb RS |
1314 | .procname = "percpu_pagelist_fraction", |
1315 | .data = &percpu_pagelist_fraction, | |
1316 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1317 | .mode = 0644, | |
6d456111 | 1318 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1319 | .extra1 = &zero, |
8ad4b1fb | 1320 | }, |
1da177e4 LT |
1321 | #ifdef CONFIG_MMU |
1322 | { | |
1da177e4 LT |
1323 | .procname = "max_map_count", |
1324 | .data = &sysctl_max_map_count, | |
1325 | .maxlen = sizeof(sysctl_max_map_count), | |
1326 | .mode = 0644, | |
3e26120c | 1327 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1328 | .extra1 = &zero, |
1da177e4 | 1329 | }, |
dd8632a1 PM |
1330 | #else |
1331 | { | |
dd8632a1 PM |
1332 | .procname = "nr_trim_pages", |
1333 | .data = &sysctl_nr_trim_pages, | |
1334 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1335 | .mode = 0644, | |
6d456111 | 1336 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1337 | .extra1 = &zero, |
1338 | }, | |
1da177e4 LT |
1339 | #endif |
1340 | { | |
1da177e4 LT |
1341 | .procname = "laptop_mode", |
1342 | .data = &laptop_mode, | |
1343 | .maxlen = sizeof(laptop_mode), | |
1344 | .mode = 0644, | |
6d456111 | 1345 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1346 | }, |
1347 | { | |
1da177e4 LT |
1348 | .procname = "block_dump", |
1349 | .data = &block_dump, | |
1350 | .maxlen = sizeof(block_dump), | |
1351 | .mode = 0644, | |
6d456111 | 1352 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1353 | .extra1 = &zero, |
1354 | }, | |
1355 | { | |
1da177e4 LT |
1356 | .procname = "vfs_cache_pressure", |
1357 | .data = &sysctl_vfs_cache_pressure, | |
1358 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1359 | .mode = 0644, | |
6d456111 | 1360 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1361 | .extra1 = &zero, |
1362 | }, | |
1363 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1364 | { | |
1da177e4 LT |
1365 | .procname = "legacy_va_layout", |
1366 | .data = &sysctl_legacy_va_layout, | |
1367 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1368 | .mode = 0644, | |
6d456111 | 1369 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1370 | .extra1 = &zero, |
1371 | }, | |
1372 | #endif | |
1743660b CL |
1373 | #ifdef CONFIG_NUMA |
1374 | { | |
1743660b CL |
1375 | .procname = "zone_reclaim_mode", |
1376 | .data = &zone_reclaim_mode, | |
1377 | .maxlen = sizeof(zone_reclaim_mode), | |
1378 | .mode = 0644, | |
6d456111 | 1379 | .proc_handler = proc_dointvec, |
c84db23c | 1380 | .extra1 = &zero, |
1743660b | 1381 | }, |
9614634f | 1382 | { |
9614634f CL |
1383 | .procname = "min_unmapped_ratio", |
1384 | .data = &sysctl_min_unmapped_ratio, | |
1385 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1386 | .mode = 0644, | |
6d456111 | 1387 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1388 | .extra1 = &zero, |
1389 | .extra2 = &one_hundred, | |
1390 | }, | |
0ff38490 | 1391 | { |
0ff38490 CL |
1392 | .procname = "min_slab_ratio", |
1393 | .data = &sysctl_min_slab_ratio, | |
1394 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1395 | .mode = 0644, | |
6d456111 | 1396 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1397 | .extra1 = &zero, |
1398 | .extra2 = &one_hundred, | |
1399 | }, | |
e6e5494c | 1400 | #endif |
77461ab3 CL |
1401 | #ifdef CONFIG_SMP |
1402 | { | |
77461ab3 CL |
1403 | .procname = "stat_interval", |
1404 | .data = &sysctl_stat_interval, | |
1405 | .maxlen = sizeof(sysctl_stat_interval), | |
1406 | .mode = 0644, | |
6d456111 | 1407 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1408 | }, |
1409 | #endif | |
6e141546 | 1410 | #ifdef CONFIG_MMU |
ed032189 | 1411 | { |
ed032189 | 1412 | .procname = "mmap_min_addr", |
788084ab EP |
1413 | .data = &dac_mmap_min_addr, |
1414 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1415 | .mode = 0644, |
6d456111 | 1416 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1417 | }, |
6e141546 | 1418 | #endif |
f0c0b2b8 KH |
1419 | #ifdef CONFIG_NUMA |
1420 | { | |
f0c0b2b8 KH |
1421 | .procname = "numa_zonelist_order", |
1422 | .data = &numa_zonelist_order, | |
1423 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1424 | .mode = 0644, | |
6d456111 | 1425 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1426 | }, |
1427 | #endif | |
2b8232ce | 1428 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1429 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1430 | { |
e6e5494c | 1431 | .procname = "vdso_enabled", |
3d7ee969 AL |
1432 | #ifdef CONFIG_X86_32 |
1433 | .data = &vdso32_enabled, | |
1434 | .maxlen = sizeof(vdso32_enabled), | |
1435 | #else | |
e6e5494c IM |
1436 | .data = &vdso_enabled, |
1437 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1438 | #endif |
e6e5494c | 1439 | .mode = 0644, |
6d456111 | 1440 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1441 | .extra1 = &zero, |
1442 | }, | |
1da177e4 | 1443 | #endif |
195cf453 BG |
1444 | #ifdef CONFIG_HIGHMEM |
1445 | { | |
195cf453 BG |
1446 | .procname = "highmem_is_dirtyable", |
1447 | .data = &vm_highmem_is_dirtyable, | |
1448 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1449 | .mode = 0644, | |
6d456111 | 1450 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1451 | .extra1 = &zero, |
1452 | .extra2 = &one, | |
1453 | }, | |
1454 | #endif | |
6a46079c AK |
1455 | #ifdef CONFIG_MEMORY_FAILURE |
1456 | { | |
6a46079c AK |
1457 | .procname = "memory_failure_early_kill", |
1458 | .data = &sysctl_memory_failure_early_kill, | |
1459 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1460 | .mode = 0644, | |
6d456111 | 1461 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1462 | .extra1 = &zero, |
1463 | .extra2 = &one, | |
1464 | }, | |
1465 | { | |
6a46079c AK |
1466 | .procname = "memory_failure_recovery", |
1467 | .data = &sysctl_memory_failure_recovery, | |
1468 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1469 | .mode = 0644, | |
6d456111 | 1470 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1471 | .extra1 = &zero, |
1472 | .extra2 = &one, | |
1473 | }, | |
1474 | #endif | |
c9b1d098 AS |
1475 | { |
1476 | .procname = "user_reserve_kbytes", | |
1477 | .data = &sysctl_user_reserve_kbytes, | |
1478 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1479 | .mode = 0644, | |
1480 | .proc_handler = proc_doulongvec_minmax, | |
1481 | }, | |
4eeab4f5 AS |
1482 | { |
1483 | .procname = "admin_reserve_kbytes", | |
1484 | .data = &sysctl_admin_reserve_kbytes, | |
1485 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1486 | .mode = 0644, | |
1487 | .proc_handler = proc_doulongvec_minmax, | |
1488 | }, | |
6fce56ec | 1489 | { } |
1da177e4 LT |
1490 | }; |
1491 | ||
2abc26fc | 1492 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1493 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1494 | { } |
2abc26fc EB |
1495 | }; |
1496 | #endif | |
1497 | ||
d8217f07 | 1498 | static struct ctl_table fs_table[] = { |
1da177e4 | 1499 | { |
1da177e4 LT |
1500 | .procname = "inode-nr", |
1501 | .data = &inodes_stat, | |
3942c07c | 1502 | .maxlen = 2*sizeof(long), |
1da177e4 | 1503 | .mode = 0444, |
cffbc8aa | 1504 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1505 | }, |
1506 | { | |
1da177e4 LT |
1507 | .procname = "inode-state", |
1508 | .data = &inodes_stat, | |
3942c07c | 1509 | .maxlen = 7*sizeof(long), |
1da177e4 | 1510 | .mode = 0444, |
cffbc8aa | 1511 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1512 | }, |
1513 | { | |
1da177e4 LT |
1514 | .procname = "file-nr", |
1515 | .data = &files_stat, | |
518de9b3 | 1516 | .maxlen = sizeof(files_stat), |
1da177e4 | 1517 | .mode = 0444, |
6d456111 | 1518 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1519 | }, |
1520 | { | |
1da177e4 LT |
1521 | .procname = "file-max", |
1522 | .data = &files_stat.max_files, | |
518de9b3 | 1523 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1524 | .mode = 0644, |
518de9b3 | 1525 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1526 | }, |
9cfe015a | 1527 | { |
9cfe015a ED |
1528 | .procname = "nr_open", |
1529 | .data = &sysctl_nr_open, | |
1530 | .maxlen = sizeof(int), | |
1531 | .mode = 0644, | |
6d456111 | 1532 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1533 | .extra1 = &sysctl_nr_open_min, |
1534 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1535 | }, |
1da177e4 | 1536 | { |
1da177e4 LT |
1537 | .procname = "dentry-state", |
1538 | .data = &dentry_stat, | |
3942c07c | 1539 | .maxlen = 6*sizeof(long), |
1da177e4 | 1540 | .mode = 0444, |
312d3ca8 | 1541 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1542 | }, |
1543 | { | |
1da177e4 LT |
1544 | .procname = "overflowuid", |
1545 | .data = &fs_overflowuid, | |
1546 | .maxlen = sizeof(int), | |
1547 | .mode = 0644, | |
6d456111 | 1548 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1549 | .extra1 = &minolduid, |
1550 | .extra2 = &maxolduid, | |
1551 | }, | |
1552 | { | |
1da177e4 LT |
1553 | .procname = "overflowgid", |
1554 | .data = &fs_overflowgid, | |
1555 | .maxlen = sizeof(int), | |
1556 | .mode = 0644, | |
6d456111 | 1557 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1558 | .extra1 = &minolduid, |
1559 | .extra2 = &maxolduid, | |
1560 | }, | |
bfcd17a6 | 1561 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1562 | { |
1da177e4 LT |
1563 | .procname = "leases-enable", |
1564 | .data = &leases_enable, | |
1565 | .maxlen = sizeof(int), | |
1566 | .mode = 0644, | |
6d456111 | 1567 | .proc_handler = proc_dointvec, |
1da177e4 | 1568 | }, |
bfcd17a6 | 1569 | #endif |
1da177e4 LT |
1570 | #ifdef CONFIG_DNOTIFY |
1571 | { | |
1da177e4 LT |
1572 | .procname = "dir-notify-enable", |
1573 | .data = &dir_notify_enable, | |
1574 | .maxlen = sizeof(int), | |
1575 | .mode = 0644, | |
6d456111 | 1576 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1577 | }, |
1578 | #endif | |
1579 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1580 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1581 | { |
1da177e4 LT |
1582 | .procname = "lease-break-time", |
1583 | .data = &lease_break_time, | |
1584 | .maxlen = sizeof(int), | |
1585 | .mode = 0644, | |
6d456111 | 1586 | .proc_handler = proc_dointvec, |
1da177e4 | 1587 | }, |
bfcd17a6 | 1588 | #endif |
ebf3f09c | 1589 | #ifdef CONFIG_AIO |
1da177e4 | 1590 | { |
1da177e4 LT |
1591 | .procname = "aio-nr", |
1592 | .data = &aio_nr, | |
1593 | .maxlen = sizeof(aio_nr), | |
1594 | .mode = 0444, | |
6d456111 | 1595 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1596 | }, |
1597 | { | |
1da177e4 LT |
1598 | .procname = "aio-max-nr", |
1599 | .data = &aio_max_nr, | |
1600 | .maxlen = sizeof(aio_max_nr), | |
1601 | .mode = 0644, | |
6d456111 | 1602 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1603 | }, |
ebf3f09c | 1604 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1605 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1606 | { |
0399cb08 RL |
1607 | .procname = "inotify", |
1608 | .mode = 0555, | |
1609 | .child = inotify_table, | |
1610 | }, | |
1611 | #endif | |
7ef9964e DL |
1612 | #ifdef CONFIG_EPOLL |
1613 | { | |
1614 | .procname = "epoll", | |
1615 | .mode = 0555, | |
1616 | .child = epoll_table, | |
1617 | }, | |
1618 | #endif | |
1da177e4 | 1619 | #endif |
800179c9 KC |
1620 | { |
1621 | .procname = "protected_symlinks", | |
1622 | .data = &sysctl_protected_symlinks, | |
1623 | .maxlen = sizeof(int), | |
1624 | .mode = 0600, | |
1625 | .proc_handler = proc_dointvec_minmax, | |
1626 | .extra1 = &zero, | |
1627 | .extra2 = &one, | |
1628 | }, | |
1629 | { | |
1630 | .procname = "protected_hardlinks", | |
1631 | .data = &sysctl_protected_hardlinks, | |
1632 | .maxlen = sizeof(int), | |
1633 | .mode = 0600, | |
1634 | .proc_handler = proc_dointvec_minmax, | |
1635 | .extra1 = &zero, | |
1636 | .extra2 = &one, | |
1637 | }, | |
d6e71144 | 1638 | { |
d6e71144 AC |
1639 | .procname = "suid_dumpable", |
1640 | .data = &suid_dumpable, | |
1641 | .maxlen = sizeof(int), | |
1642 | .mode = 0644, | |
54b50199 | 1643 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1644 | .extra1 = &zero, |
1645 | .extra2 = &two, | |
d6e71144 | 1646 | }, |
2abc26fc EB |
1647 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1648 | { | |
2abc26fc EB |
1649 | .procname = "binfmt_misc", |
1650 | .mode = 0555, | |
1651 | .child = binfmt_misc_table, | |
1652 | }, | |
1653 | #endif | |
b492e95b | 1654 | { |
ff9da691 JA |
1655 | .procname = "pipe-max-size", |
1656 | .data = &pipe_max_size, | |
b492e95b JA |
1657 | .maxlen = sizeof(int), |
1658 | .mode = 0644, | |
ff9da691 JA |
1659 | .proc_handler = &pipe_proc_fn, |
1660 | .extra1 = &pipe_min_size, | |
b492e95b | 1661 | }, |
6fce56ec | 1662 | { } |
1da177e4 LT |
1663 | }; |
1664 | ||
d8217f07 | 1665 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1666 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1667 | { |
abd4f750 MAS |
1668 | .procname = "exception-trace", |
1669 | .data = &show_unhandled_signals, | |
1670 | .maxlen = sizeof(int), | |
1671 | .mode = 0644, | |
1672 | .proc_handler = proc_dointvec | |
1673 | }, | |
b2be84df MH |
1674 | #endif |
1675 | #if defined(CONFIG_OPTPROBES) | |
1676 | { | |
1677 | .procname = "kprobes-optimization", | |
1678 | .data = &sysctl_kprobes_optimization, | |
1679 | .maxlen = sizeof(int), | |
1680 | .mode = 0644, | |
1681 | .proc_handler = proc_kprobes_optimization_handler, | |
1682 | .extra1 = &zero, | |
1683 | .extra2 = &one, | |
1684 | }, | |
abd4f750 | 1685 | #endif |
6fce56ec | 1686 | { } |
1da177e4 LT |
1687 | }; |
1688 | ||
d8217f07 | 1689 | static struct ctl_table dev_table[] = { |
6fce56ec | 1690 | { } |
0eeca283 | 1691 | }; |
1da177e4 | 1692 | |
de4e83bd | 1693 | int __init sysctl_init(void) |
d912b0cc | 1694 | { |
fd4b616b SR |
1695 | struct ctl_table_header *hdr; |
1696 | ||
1697 | hdr = register_sysctl_table(sysctl_base_table); | |
1698 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1699 | return 0; |
1700 | } | |
1701 | ||
b89a8171 EB |
1702 | #endif /* CONFIG_SYSCTL */ |
1703 | ||
1da177e4 LT |
1704 | /* |
1705 | * /proc/sys support | |
1706 | */ | |
1707 | ||
b89a8171 | 1708 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1709 | |
f8808300 KC |
1710 | static int _proc_do_string(char *data, int maxlen, int write, |
1711 | char __user *buffer, | |
b1ba4ddd | 1712 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1713 | { |
1714 | size_t len; | |
1715 | char __user *p; | |
1716 | char c; | |
8d060877 ON |
1717 | |
1718 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1719 | *lenp = 0; |
1720 | return 0; | |
1721 | } | |
8d060877 | 1722 | |
1da177e4 | 1723 | if (write) { |
f4aacea2 KC |
1724 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1725 | /* Only continue writes not past the end of buffer. */ | |
1726 | len = strlen(data); | |
1727 | if (len > maxlen - 1) | |
1728 | len = maxlen - 1; | |
1729 | ||
1730 | if (*ppos > len) | |
1731 | return 0; | |
1732 | len = *ppos; | |
1733 | } else { | |
1734 | /* Start writing from beginning of buffer. */ | |
1735 | len = 0; | |
1736 | } | |
1737 | ||
2ca9bb45 | 1738 | *ppos += *lenp; |
1da177e4 | 1739 | p = buffer; |
2ca9bb45 | 1740 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1741 | if (get_user(c, p++)) |
1742 | return -EFAULT; | |
1743 | if (c == 0 || c == '\n') | |
1744 | break; | |
2ca9bb45 | 1745 | data[len++] = c; |
1da177e4 | 1746 | } |
f8808300 | 1747 | data[len] = 0; |
1da177e4 | 1748 | } else { |
f5dd3d6f SV |
1749 | len = strlen(data); |
1750 | if (len > maxlen) | |
1751 | len = maxlen; | |
8d060877 ON |
1752 | |
1753 | if (*ppos > len) { | |
1754 | *lenp = 0; | |
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | data += *ppos; | |
1759 | len -= *ppos; | |
1760 | ||
1da177e4 LT |
1761 | if (len > *lenp) |
1762 | len = *lenp; | |
1763 | if (len) | |
f8808300 | 1764 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1765 | return -EFAULT; |
1766 | if (len < *lenp) { | |
f8808300 | 1767 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1768 | return -EFAULT; |
1769 | len++; | |
1770 | } | |
1771 | *lenp = len; | |
1772 | *ppos += len; | |
1773 | } | |
1774 | return 0; | |
1775 | } | |
1776 | ||
f4aacea2 KC |
1777 | static void warn_sysctl_write(struct ctl_table *table) |
1778 | { | |
1779 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1780 | "This will not be supported in the future. To silence this\n" | |
1781 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1782 | current->comm, table->procname); | |
1783 | } | |
1784 | ||
f5dd3d6f SV |
1785 | /** |
1786 | * proc_dostring - read a string sysctl | |
1787 | * @table: the sysctl table | |
1788 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1789 | * @buffer: the user buffer |
1790 | * @lenp: the size of the user buffer | |
1791 | * @ppos: file position | |
1792 | * | |
1793 | * Reads/writes a string from/to the user buffer. If the kernel | |
1794 | * buffer provided is not large enough to hold the string, the | |
1795 | * string is truncated. The copied string is %NULL-terminated. | |
1796 | * If the string is being read by the user process, it is copied | |
1797 | * and a newline '\n' is added. It is truncated if the buffer is | |
1798 | * not large enough. | |
1799 | * | |
1800 | * Returns 0 on success. | |
1801 | */ | |
8d65af78 | 1802 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1803 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1804 | { | |
f4aacea2 KC |
1805 | if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) |
1806 | warn_sysctl_write(table); | |
1807 | ||
f8808300 KC |
1808 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
1809 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
1810 | } |
1811 | ||
00b7c339 AW |
1812 | static size_t proc_skip_spaces(char **buf) |
1813 | { | |
1814 | size_t ret; | |
1815 | char *tmp = skip_spaces(*buf); | |
1816 | ret = tmp - *buf; | |
1817 | *buf = tmp; | |
1818 | return ret; | |
1819 | } | |
1820 | ||
9f977fb7 OP |
1821 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1822 | { | |
1823 | while (*size) { | |
1824 | if (**buf != v) | |
1825 | break; | |
1826 | (*size)--; | |
1827 | (*buf)++; | |
1828 | } | |
1829 | } | |
1830 | ||
00b7c339 AW |
1831 | #define TMPBUFLEN 22 |
1832 | /** | |
0fc377bd | 1833 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1834 | * |
0fc377bd RD |
1835 | * @buf: a kernel buffer |
1836 | * @size: size of the kernel buffer | |
1837 | * @val: this is where the number will be stored | |
1838 | * @neg: set to %TRUE if number is negative | |
1839 | * @perm_tr: a vector which contains the allowed trailers | |
1840 | * @perm_tr_len: size of the perm_tr vector | |
1841 | * @tr: pointer to store the trailer character | |
00b7c339 | 1842 | * |
0fc377bd RD |
1843 | * In case of success %0 is returned and @buf and @size are updated with |
1844 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1845 | * character exists (size is non-zero after returning from this | |
1846 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1847 | */ |
1848 | static int proc_get_long(char **buf, size_t *size, | |
1849 | unsigned long *val, bool *neg, | |
1850 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1851 | { | |
1852 | int len; | |
1853 | char *p, tmp[TMPBUFLEN]; | |
1854 | ||
1855 | if (!*size) | |
1856 | return -EINVAL; | |
1857 | ||
1858 | len = *size; | |
1859 | if (len > TMPBUFLEN - 1) | |
1860 | len = TMPBUFLEN - 1; | |
1861 | ||
1862 | memcpy(tmp, *buf, len); | |
1863 | ||
1864 | tmp[len] = 0; | |
1865 | p = tmp; | |
1866 | if (*p == '-' && *size > 1) { | |
1867 | *neg = true; | |
1868 | p++; | |
1869 | } else | |
1870 | *neg = false; | |
1871 | if (!isdigit(*p)) | |
1872 | return -EINVAL; | |
1873 | ||
1874 | *val = simple_strtoul(p, &p, 0); | |
1875 | ||
1876 | len = p - tmp; | |
1877 | ||
1878 | /* We don't know if the next char is whitespace thus we may accept | |
1879 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
1880 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
1881 | if (len == TMPBUFLEN - 1) | |
1882 | return -EINVAL; | |
1883 | ||
1884 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
1885 | return -EINVAL; | |
1da177e4 | 1886 | |
00b7c339 AW |
1887 | if (tr && (len < *size)) |
1888 | *tr = *p; | |
1889 | ||
1890 | *buf += len; | |
1891 | *size -= len; | |
1892 | ||
1893 | return 0; | |
1894 | } | |
1895 | ||
1896 | /** | |
0fc377bd | 1897 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 1898 | * |
0fc377bd RD |
1899 | * @buf: the user buffer |
1900 | * @size: the size of the user buffer | |
1901 | * @val: the integer to be converted | |
1902 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 1903 | * |
0fc377bd RD |
1904 | * In case of success %0 is returned and @buf and @size are updated with |
1905 | * the amount of bytes written. | |
00b7c339 AW |
1906 | */ |
1907 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
1908 | bool neg) | |
1909 | { | |
1910 | int len; | |
1911 | char tmp[TMPBUFLEN], *p = tmp; | |
1912 | ||
1913 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
1914 | len = strlen(tmp); | |
1915 | if (len > *size) | |
1916 | len = *size; | |
1917 | if (copy_to_user(*buf, tmp, len)) | |
1918 | return -EFAULT; | |
1919 | *size -= len; | |
1920 | *buf += len; | |
1921 | return 0; | |
1922 | } | |
1923 | #undef TMPBUFLEN | |
1924 | ||
1925 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
1926 | { | |
1927 | if (*size) { | |
1928 | char __user **buffer = (char __user **)buf; | |
1929 | if (put_user(c, *buffer)) | |
1930 | return -EFAULT; | |
1931 | (*size)--, (*buffer)++; | |
1932 | *buf = *buffer; | |
1933 | } | |
1934 | return 0; | |
1935 | } | |
1da177e4 | 1936 | |
00b7c339 | 1937 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1938 | int *valp, |
1939 | int write, void *data) | |
1940 | { | |
1941 | if (write) { | |
1942 | *valp = *negp ? -*lvalp : *lvalp; | |
1943 | } else { | |
1944 | int val = *valp; | |
1945 | if (val < 0) { | |
00b7c339 | 1946 | *negp = true; |
1da177e4 LT |
1947 | *lvalp = (unsigned long)-val; |
1948 | } else { | |
00b7c339 | 1949 | *negp = false; |
1da177e4 LT |
1950 | *lvalp = (unsigned long)val; |
1951 | } | |
1952 | } | |
1953 | return 0; | |
1954 | } | |
1955 | ||
00b7c339 AW |
1956 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
1957 | ||
d8217f07 | 1958 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 1959 | int write, void __user *buffer, |
fcfbd547 | 1960 | size_t *lenp, loff_t *ppos, |
00b7c339 | 1961 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
1962 | int write, void *data), |
1963 | void *data) | |
1964 | { | |
00b7c339 AW |
1965 | int *i, vleft, first = 1, err = 0; |
1966 | unsigned long page = 0; | |
1967 | size_t left; | |
1968 | char *kbuf; | |
1da177e4 | 1969 | |
00b7c339 | 1970 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
1971 | *lenp = 0; |
1972 | return 0; | |
1973 | } | |
1974 | ||
fcfbd547 | 1975 | i = (int *) tbl_data; |
1da177e4 LT |
1976 | vleft = table->maxlen / sizeof(*i); |
1977 | left = *lenp; | |
1978 | ||
1979 | if (!conv) | |
1980 | conv = do_proc_dointvec_conv; | |
1981 | ||
00b7c339 | 1982 | if (write) { |
f4aacea2 KC |
1983 | if (*ppos) { |
1984 | switch (sysctl_writes_strict) { | |
1985 | case SYSCTL_WRITES_STRICT: | |
1986 | goto out; | |
1987 | case SYSCTL_WRITES_WARN: | |
1988 | warn_sysctl_write(table); | |
1989 | break; | |
1990 | default: | |
1991 | break; | |
1992 | } | |
1993 | } | |
1994 | ||
00b7c339 AW |
1995 | if (left > PAGE_SIZE - 1) |
1996 | left = PAGE_SIZE - 1; | |
1997 | page = __get_free_page(GFP_TEMPORARY); | |
1998 | kbuf = (char *) page; | |
1999 | if (!kbuf) | |
2000 | return -ENOMEM; | |
2001 | if (copy_from_user(kbuf, buffer, left)) { | |
2002 | err = -EFAULT; | |
2003 | goto free; | |
2004 | } | |
2005 | kbuf[left] = 0; | |
2006 | } | |
2007 | ||
1da177e4 | 2008 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2009 | unsigned long lval; |
2010 | bool neg; | |
1da177e4 | 2011 | |
00b7c339 AW |
2012 | if (write) { |
2013 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 2014 | |
563b0467 O |
2015 | if (!left) |
2016 | break; | |
00b7c339 AW |
2017 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
2018 | proc_wspace_sep, | |
2019 | sizeof(proc_wspace_sep), NULL); | |
2020 | if (err) | |
1da177e4 | 2021 | break; |
00b7c339 AW |
2022 | if (conv(&neg, &lval, i, 1, data)) { |
2023 | err = -EINVAL; | |
1da177e4 | 2024 | break; |
00b7c339 | 2025 | } |
1da177e4 | 2026 | } else { |
00b7c339 AW |
2027 | if (conv(&neg, &lval, i, 0, data)) { |
2028 | err = -EINVAL; | |
2029 | break; | |
2030 | } | |
1da177e4 | 2031 | if (!first) |
00b7c339 AW |
2032 | err = proc_put_char(&buffer, &left, '\t'); |
2033 | if (err) | |
2034 | break; | |
2035 | err = proc_put_long(&buffer, &left, lval, neg); | |
2036 | if (err) | |
1da177e4 | 2037 | break; |
1da177e4 LT |
2038 | } |
2039 | } | |
2040 | ||
00b7c339 AW |
2041 | if (!write && !first && left && !err) |
2042 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2043 | if (write && !err && left) |
00b7c339 AW |
2044 | left -= proc_skip_spaces(&kbuf); |
2045 | free: | |
1da177e4 | 2046 | if (write) { |
00b7c339 AW |
2047 | free_page(page); |
2048 | if (first) | |
2049 | return err ? : -EINVAL; | |
1da177e4 | 2050 | } |
1da177e4 | 2051 | *lenp -= left; |
f4aacea2 | 2052 | out: |
1da177e4 | 2053 | *ppos += *lenp; |
00b7c339 | 2054 | return err; |
1da177e4 LT |
2055 | } |
2056 | ||
8d65af78 | 2057 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2058 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2059 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2060 | int write, void *data), |
2061 | void *data) | |
2062 | { | |
8d65af78 | 2063 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2064 | buffer, lenp, ppos, conv, data); |
2065 | } | |
2066 | ||
1da177e4 LT |
2067 | /** |
2068 | * proc_dointvec - read a vector of integers | |
2069 | * @table: the sysctl table | |
2070 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2071 | * @buffer: the user buffer |
2072 | * @lenp: the size of the user buffer | |
2073 | * @ppos: file position | |
2074 | * | |
2075 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2076 | * values from/to the user buffer, treated as an ASCII string. | |
2077 | * | |
2078 | * Returns 0 on success. | |
2079 | */ | |
8d65af78 | 2080 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2081 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2082 | { | |
8d65af78 | 2083 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2084 | NULL,NULL); |
2085 | } | |
2086 | ||
34f5a398 | 2087 | /* |
25ddbb18 AK |
2088 | * Taint values can only be increased |
2089 | * This means we can safely use a temporary. | |
34f5a398 | 2090 | */ |
8d65af78 | 2091 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2092 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2093 | { | |
25ddbb18 AK |
2094 | struct ctl_table t; |
2095 | unsigned long tmptaint = get_taint(); | |
2096 | int err; | |
34f5a398 | 2097 | |
91fcd412 | 2098 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2099 | return -EPERM; |
2100 | ||
25ddbb18 AK |
2101 | t = *table; |
2102 | t.data = &tmptaint; | |
8d65af78 | 2103 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2104 | if (err < 0) |
2105 | return err; | |
2106 | ||
2107 | if (write) { | |
2108 | /* | |
2109 | * Poor man's atomic or. Not worth adding a primitive | |
2110 | * to everyone's atomic.h for this | |
2111 | */ | |
2112 | int i; | |
2113 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2114 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2115 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2116 | } |
2117 | } | |
2118 | ||
2119 | return err; | |
34f5a398 TT |
2120 | } |
2121 | ||
bfdc0b49 | 2122 | #ifdef CONFIG_PRINTK |
620f6e8e | 2123 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2124 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2125 | { | |
2126 | if (write && !capable(CAP_SYS_ADMIN)) | |
2127 | return -EPERM; | |
2128 | ||
2129 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2130 | } | |
2131 | #endif | |
2132 | ||
1da177e4 LT |
2133 | struct do_proc_dointvec_minmax_conv_param { |
2134 | int *min; | |
2135 | int *max; | |
2136 | }; | |
2137 | ||
00b7c339 AW |
2138 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2139 | int *valp, | |
1da177e4 LT |
2140 | int write, void *data) |
2141 | { | |
2142 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2143 | if (write) { | |
2144 | int val = *negp ? -*lvalp : *lvalp; | |
2145 | if ((param->min && *param->min > val) || | |
2146 | (param->max && *param->max < val)) | |
2147 | return -EINVAL; | |
2148 | *valp = val; | |
2149 | } else { | |
2150 | int val = *valp; | |
2151 | if (val < 0) { | |
00b7c339 | 2152 | *negp = true; |
1da177e4 LT |
2153 | *lvalp = (unsigned long)-val; |
2154 | } else { | |
00b7c339 | 2155 | *negp = false; |
1da177e4 LT |
2156 | *lvalp = (unsigned long)val; |
2157 | } | |
2158 | } | |
2159 | return 0; | |
2160 | } | |
2161 | ||
2162 | /** | |
2163 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2164 | * @table: the sysctl table | |
2165 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2166 | * @buffer: the user buffer |
2167 | * @lenp: the size of the user buffer | |
2168 | * @ppos: file position | |
2169 | * | |
2170 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2171 | * values from/to the user buffer, treated as an ASCII string. | |
2172 | * | |
2173 | * This routine will ensure the values are within the range specified by | |
2174 | * table->extra1 (min) and table->extra2 (max). | |
2175 | * | |
2176 | * Returns 0 on success. | |
2177 | */ | |
8d65af78 | 2178 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2179 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2180 | { | |
2181 | struct do_proc_dointvec_minmax_conv_param param = { | |
2182 | .min = (int *) table->extra1, | |
2183 | .max = (int *) table->extra2, | |
2184 | }; | |
8d65af78 | 2185 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2186 | do_proc_dointvec_minmax_conv, ¶m); |
2187 | } | |
2188 | ||
54b50199 KC |
2189 | static void validate_coredump_safety(void) |
2190 | { | |
046d662f | 2191 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2192 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 KC |
2193 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
2194 | printk(KERN_WARNING "Unsafe core_pattern used with "\ | |
2195 | "suid_dumpable=2. Pipe handler or fully qualified "\ | |
2196 | "core dump path required.\n"); | |
2197 | } | |
046d662f | 2198 | #endif |
54b50199 KC |
2199 | } |
2200 | ||
2201 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2202 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2203 | { | |
2204 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2205 | if (!error) | |
2206 | validate_coredump_safety(); | |
2207 | return error; | |
2208 | } | |
2209 | ||
046d662f | 2210 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2211 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2212 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2213 | { | |
2214 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2215 | if (!error) | |
2216 | validate_coredump_safety(); | |
2217 | return error; | |
2218 | } | |
046d662f | 2219 | #endif |
54b50199 | 2220 | |
d8217f07 | 2221 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2222 | void __user *buffer, |
2223 | size_t *lenp, loff_t *ppos, | |
2224 | unsigned long convmul, | |
2225 | unsigned long convdiv) | |
2226 | { | |
00b7c339 AW |
2227 | unsigned long *i, *min, *max; |
2228 | int vleft, first = 1, err = 0; | |
2229 | unsigned long page = 0; | |
2230 | size_t left; | |
2231 | char *kbuf; | |
2232 | ||
2233 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2234 | *lenp = 0; |
2235 | return 0; | |
2236 | } | |
00b7c339 | 2237 | |
fcfbd547 | 2238 | i = (unsigned long *) data; |
1da177e4 LT |
2239 | min = (unsigned long *) table->extra1; |
2240 | max = (unsigned long *) table->extra2; | |
2241 | vleft = table->maxlen / sizeof(unsigned long); | |
2242 | left = *lenp; | |
00b7c339 AW |
2243 | |
2244 | if (write) { | |
f4aacea2 KC |
2245 | if (*ppos) { |
2246 | switch (sysctl_writes_strict) { | |
2247 | case SYSCTL_WRITES_STRICT: | |
2248 | goto out; | |
2249 | case SYSCTL_WRITES_WARN: | |
2250 | warn_sysctl_write(table); | |
2251 | break; | |
2252 | default: | |
2253 | break; | |
2254 | } | |
2255 | } | |
2256 | ||
00b7c339 AW |
2257 | if (left > PAGE_SIZE - 1) |
2258 | left = PAGE_SIZE - 1; | |
2259 | page = __get_free_page(GFP_TEMPORARY); | |
2260 | kbuf = (char *) page; | |
2261 | if (!kbuf) | |
2262 | return -ENOMEM; | |
2263 | if (copy_from_user(kbuf, buffer, left)) { | |
2264 | err = -EFAULT; | |
2265 | goto free; | |
2266 | } | |
2267 | kbuf[left] = 0; | |
2268 | } | |
2269 | ||
27b3d80a | 2270 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2271 | unsigned long val; |
2272 | ||
1da177e4 | 2273 | if (write) { |
00b7c339 AW |
2274 | bool neg; |
2275 | ||
2276 | left -= proc_skip_spaces(&kbuf); | |
2277 | ||
2278 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2279 | proc_wspace_sep, | |
2280 | sizeof(proc_wspace_sep), NULL); | |
2281 | if (err) | |
1da177e4 LT |
2282 | break; |
2283 | if (neg) | |
1da177e4 LT |
2284 | continue; |
2285 | if ((min && val < *min) || (max && val > *max)) | |
2286 | continue; | |
2287 | *i = val; | |
2288 | } else { | |
00b7c339 | 2289 | val = convdiv * (*i) / convmul; |
7833819d | 2290 | if (!first) { |
00b7c339 | 2291 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2292 | if (err) |
2293 | break; | |
2294 | } | |
00b7c339 AW |
2295 | err = proc_put_long(&buffer, &left, val, false); |
2296 | if (err) | |
2297 | break; | |
1da177e4 LT |
2298 | } |
2299 | } | |
2300 | ||
00b7c339 AW |
2301 | if (!write && !first && left && !err) |
2302 | err = proc_put_char(&buffer, &left, '\n'); | |
2303 | if (write && !err) | |
2304 | left -= proc_skip_spaces(&kbuf); | |
2305 | free: | |
1da177e4 | 2306 | if (write) { |
00b7c339 AW |
2307 | free_page(page); |
2308 | if (first) | |
2309 | return err ? : -EINVAL; | |
1da177e4 | 2310 | } |
1da177e4 | 2311 | *lenp -= left; |
f4aacea2 | 2312 | out: |
1da177e4 | 2313 | *ppos += *lenp; |
00b7c339 | 2314 | return err; |
1da177e4 LT |
2315 | } |
2316 | ||
d8217f07 | 2317 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2318 | void __user *buffer, |
2319 | size_t *lenp, loff_t *ppos, | |
2320 | unsigned long convmul, | |
2321 | unsigned long convdiv) | |
2322 | { | |
2323 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2324 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2325 | } |
2326 | ||
1da177e4 LT |
2327 | /** |
2328 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2329 | * @table: the sysctl table | |
2330 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2331 | * @buffer: the user buffer |
2332 | * @lenp: the size of the user buffer | |
2333 | * @ppos: file position | |
2334 | * | |
2335 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2336 | * values from/to the user buffer, treated as an ASCII string. | |
2337 | * | |
2338 | * This routine will ensure the values are within the range specified by | |
2339 | * table->extra1 (min) and table->extra2 (max). | |
2340 | * | |
2341 | * Returns 0 on success. | |
2342 | */ | |
8d65af78 | 2343 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2344 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2345 | { | |
8d65af78 | 2346 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2347 | } |
2348 | ||
2349 | /** | |
2350 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2351 | * @table: the sysctl table | |
2352 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2353 | * @buffer: the user buffer |
2354 | * @lenp: the size of the user buffer | |
2355 | * @ppos: file position | |
2356 | * | |
2357 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2358 | * values from/to the user buffer, treated as an ASCII string. The values | |
2359 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2360 | * | |
2361 | * This routine will ensure the values are within the range specified by | |
2362 | * table->extra1 (min) and table->extra2 (max). | |
2363 | * | |
2364 | * Returns 0 on success. | |
2365 | */ | |
d8217f07 | 2366 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2367 | void __user *buffer, |
2368 | size_t *lenp, loff_t *ppos) | |
2369 | { | |
8d65af78 | 2370 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2371 | lenp, ppos, HZ, 1000l); |
2372 | } | |
2373 | ||
2374 | ||
00b7c339 | 2375 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2376 | int *valp, |
2377 | int write, void *data) | |
2378 | { | |
2379 | if (write) { | |
cba9f33d BS |
2380 | if (*lvalp > LONG_MAX / HZ) |
2381 | return 1; | |
1da177e4 LT |
2382 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2383 | } else { | |
2384 | int val = *valp; | |
2385 | unsigned long lval; | |
2386 | if (val < 0) { | |
00b7c339 | 2387 | *negp = true; |
1da177e4 LT |
2388 | lval = (unsigned long)-val; |
2389 | } else { | |
00b7c339 | 2390 | *negp = false; |
1da177e4 LT |
2391 | lval = (unsigned long)val; |
2392 | } | |
2393 | *lvalp = lval / HZ; | |
2394 | } | |
2395 | return 0; | |
2396 | } | |
2397 | ||
00b7c339 | 2398 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2399 | int *valp, |
2400 | int write, void *data) | |
2401 | { | |
2402 | if (write) { | |
cba9f33d BS |
2403 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2404 | return 1; | |
1da177e4 LT |
2405 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2406 | } else { | |
2407 | int val = *valp; | |
2408 | unsigned long lval; | |
2409 | if (val < 0) { | |
00b7c339 | 2410 | *negp = true; |
1da177e4 LT |
2411 | lval = (unsigned long)-val; |
2412 | } else { | |
00b7c339 | 2413 | *negp = false; |
1da177e4 LT |
2414 | lval = (unsigned long)val; |
2415 | } | |
2416 | *lvalp = jiffies_to_clock_t(lval); | |
2417 | } | |
2418 | return 0; | |
2419 | } | |
2420 | ||
00b7c339 | 2421 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2422 | int *valp, |
2423 | int write, void *data) | |
2424 | { | |
2425 | if (write) { | |
d738ce8f FF |
2426 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2427 | ||
2428 | if (jif > INT_MAX) | |
2429 | return 1; | |
2430 | *valp = (int)jif; | |
1da177e4 LT |
2431 | } else { |
2432 | int val = *valp; | |
2433 | unsigned long lval; | |
2434 | if (val < 0) { | |
00b7c339 | 2435 | *negp = true; |
1da177e4 LT |
2436 | lval = (unsigned long)-val; |
2437 | } else { | |
00b7c339 | 2438 | *negp = false; |
1da177e4 LT |
2439 | lval = (unsigned long)val; |
2440 | } | |
2441 | *lvalp = jiffies_to_msecs(lval); | |
2442 | } | |
2443 | return 0; | |
2444 | } | |
2445 | ||
2446 | /** | |
2447 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2448 | * @table: the sysctl table | |
2449 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2450 | * @buffer: the user buffer |
2451 | * @lenp: the size of the user buffer | |
2452 | * @ppos: file position | |
2453 | * | |
2454 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2455 | * values from/to the user buffer, treated as an ASCII string. | |
2456 | * The values read are assumed to be in seconds, and are converted into | |
2457 | * jiffies. | |
2458 | * | |
2459 | * Returns 0 on success. | |
2460 | */ | |
8d65af78 | 2461 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2462 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2463 | { | |
8d65af78 | 2464 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2465 | do_proc_dointvec_jiffies_conv,NULL); |
2466 | } | |
2467 | ||
2468 | /** | |
2469 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2470 | * @table: the sysctl table | |
2471 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2472 | * @buffer: the user buffer |
2473 | * @lenp: the size of the user buffer | |
1e5d5331 | 2474 | * @ppos: pointer to the file position |
1da177e4 LT |
2475 | * |
2476 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2477 | * values from/to the user buffer, treated as an ASCII string. | |
2478 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2479 | * are converted into jiffies. | |
2480 | * | |
2481 | * Returns 0 on success. | |
2482 | */ | |
8d65af78 | 2483 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2484 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2485 | { | |
8d65af78 | 2486 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2487 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2488 | } | |
2489 | ||
2490 | /** | |
2491 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2492 | * @table: the sysctl table | |
2493 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2494 | * @buffer: the user buffer |
2495 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2496 | * @ppos: file position |
2497 | * @ppos: the current position in the file | |
1da177e4 LT |
2498 | * |
2499 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2500 | * values from/to the user buffer, treated as an ASCII string. | |
2501 | * The values read are assumed to be in 1/1000 seconds, and | |
2502 | * are converted into jiffies. | |
2503 | * | |
2504 | * Returns 0 on success. | |
2505 | */ | |
8d65af78 | 2506 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2507 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2508 | { | |
8d65af78 | 2509 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2510 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2511 | } | |
2512 | ||
8d65af78 | 2513 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2514 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2515 | { | |
2516 | struct pid *new_pid; | |
2517 | pid_t tmp; | |
2518 | int r; | |
2519 | ||
6c5f3e7b | 2520 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2521 | |
8d65af78 | 2522 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2523 | lenp, ppos, NULL, NULL); |
2524 | if (r || !write) | |
2525 | return r; | |
2526 | ||
2527 | new_pid = find_get_pid(tmp); | |
2528 | if (!new_pid) | |
2529 | return -ESRCH; | |
2530 | ||
2531 | put_pid(xchg(&cad_pid, new_pid)); | |
2532 | return 0; | |
2533 | } | |
2534 | ||
9f977fb7 OP |
2535 | /** |
2536 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2537 | * @table: the sysctl table | |
2538 | * @write: %TRUE if this is a write to the sysctl file | |
2539 | * @buffer: the user buffer | |
2540 | * @lenp: the size of the user buffer | |
2541 | * @ppos: file position | |
2542 | * | |
2543 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2544 | * in table->maxlen. | |
2545 | * | |
2546 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2547 | * large bitmaps may be represented in a compact manner. Writing into | |
2548 | * the file will clear the bitmap then update it with the given input. | |
2549 | * | |
2550 | * Returns 0 on success. | |
2551 | */ | |
2552 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2553 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2554 | { | |
2555 | int err = 0; | |
2556 | bool first = 1; | |
2557 | size_t left = *lenp; | |
2558 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 2559 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
2560 | unsigned long *tmp_bitmap = NULL; |
2561 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2562 | ||
122ff243 | 2563 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
2564 | *lenp = 0; |
2565 | return 0; | |
2566 | } | |
2567 | ||
2568 | if (write) { | |
2569 | unsigned long page = 0; | |
2570 | char *kbuf; | |
2571 | ||
2572 | if (left > PAGE_SIZE - 1) | |
2573 | left = PAGE_SIZE - 1; | |
2574 | ||
2575 | page = __get_free_page(GFP_TEMPORARY); | |
2576 | kbuf = (char *) page; | |
2577 | if (!kbuf) | |
2578 | return -ENOMEM; | |
2579 | if (copy_from_user(kbuf, buffer, left)) { | |
2580 | free_page(page); | |
2581 | return -EFAULT; | |
2582 | } | |
2583 | kbuf[left] = 0; | |
2584 | ||
2585 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2586 | GFP_KERNEL); | |
2587 | if (!tmp_bitmap) { | |
2588 | free_page(page); | |
2589 | return -ENOMEM; | |
2590 | } | |
2591 | proc_skip_char(&kbuf, &left, '\n'); | |
2592 | while (!err && left) { | |
2593 | unsigned long val_a, val_b; | |
2594 | bool neg; | |
2595 | ||
2596 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2597 | sizeof(tr_a), &c); | |
2598 | if (err) | |
2599 | break; | |
2600 | if (val_a >= bitmap_len || neg) { | |
2601 | err = -EINVAL; | |
2602 | break; | |
2603 | } | |
2604 | ||
2605 | val_b = val_a; | |
2606 | if (left) { | |
2607 | kbuf++; | |
2608 | left--; | |
2609 | } | |
2610 | ||
2611 | if (c == '-') { | |
2612 | err = proc_get_long(&kbuf, &left, &val_b, | |
2613 | &neg, tr_b, sizeof(tr_b), | |
2614 | &c); | |
2615 | if (err) | |
2616 | break; | |
2617 | if (val_b >= bitmap_len || neg || | |
2618 | val_a > val_b) { | |
2619 | err = -EINVAL; | |
2620 | break; | |
2621 | } | |
2622 | if (left) { | |
2623 | kbuf++; | |
2624 | left--; | |
2625 | } | |
2626 | } | |
2627 | ||
5a04cca6 | 2628 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 OP |
2629 | first = 0; |
2630 | proc_skip_char(&kbuf, &left, '\n'); | |
2631 | } | |
2632 | free_page(page); | |
2633 | } else { | |
2634 | unsigned long bit_a, bit_b = 0; | |
2635 | ||
2636 | while (left) { | |
2637 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2638 | if (bit_a >= bitmap_len) | |
2639 | break; | |
2640 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2641 | bit_a + 1) - 1; | |
2642 | ||
2643 | if (!first) { | |
2644 | err = proc_put_char(&buffer, &left, ','); | |
2645 | if (err) | |
2646 | break; | |
2647 | } | |
2648 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2649 | if (err) | |
2650 | break; | |
2651 | if (bit_a != bit_b) { | |
2652 | err = proc_put_char(&buffer, &left, '-'); | |
2653 | if (err) | |
2654 | break; | |
2655 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2656 | if (err) | |
2657 | break; | |
2658 | } | |
2659 | ||
2660 | first = 0; bit_b++; | |
2661 | } | |
2662 | if (!err) | |
2663 | err = proc_put_char(&buffer, &left, '\n'); | |
2664 | } | |
2665 | ||
2666 | if (!err) { | |
2667 | if (write) { | |
2668 | if (*ppos) | |
2669 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2670 | else | |
5a04cca6 | 2671 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2672 | } |
2673 | kfree(tmp_bitmap); | |
2674 | *lenp -= left; | |
2675 | *ppos += *lenp; | |
2676 | return 0; | |
2677 | } else { | |
2678 | kfree(tmp_bitmap); | |
2679 | return err; | |
2680 | } | |
2681 | } | |
2682 | ||
55610500 | 2683 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2684 | |
8d65af78 | 2685 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2686 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2687 | { | |
2688 | return -ENOSYS; | |
2689 | } | |
2690 | ||
8d65af78 | 2691 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2692 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2693 | { |
2694 | return -ENOSYS; | |
2695 | } | |
2696 | ||
8d65af78 | 2697 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2698 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2699 | { | |
2700 | return -ENOSYS; | |
2701 | } | |
2702 | ||
8d65af78 | 2703 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2704 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2705 | { | |
2706 | return -ENOSYS; | |
2707 | } | |
2708 | ||
8d65af78 | 2709 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2710 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2711 | { | |
2712 | return -ENOSYS; | |
2713 | } | |
2714 | ||
8d65af78 | 2715 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2716 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2717 | { | |
2718 | return -ENOSYS; | |
2719 | } | |
2720 | ||
8d65af78 | 2721 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2722 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2723 | { | |
2724 | return -ENOSYS; | |
2725 | } | |
2726 | ||
d8217f07 | 2727 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2728 | void __user *buffer, |
2729 | size_t *lenp, loff_t *ppos) | |
2730 | { | |
2731 | return -ENOSYS; | |
2732 | } | |
2733 | ||
2734 | ||
55610500 | 2735 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2736 | |
1da177e4 LT |
2737 | /* |
2738 | * No sense putting this after each symbol definition, twice, | |
2739 | * exception granted :-) | |
2740 | */ | |
2741 | EXPORT_SYMBOL(proc_dointvec); | |
2742 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2743 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2744 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2745 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2746 | EXPORT_SYMBOL(proc_dostring); | |
2747 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2748 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |