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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; | |
8ad4b1fb | 139 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
140 | |
141 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 142 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 143 | |
80df2847 LH |
144 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
145 | #ifdef CONFIG_DETECT_HUNG_TASK | |
146 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
147 | #endif | |
148 | ||
d14f1729 DY |
149 | #ifdef CONFIG_INOTIFY_USER |
150 | #include <linux/inotify.h> | |
151 | #endif | |
72c57ed5 | 152 | #ifdef CONFIG_SPARC |
1da177e4 LT |
153 | #endif |
154 | ||
0871420f DM |
155 | #ifdef CONFIG_SPARC64 |
156 | extern int sysctl_tsb_ratio; | |
157 | #endif | |
158 | ||
1da177e4 LT |
159 | #ifdef __hppa__ |
160 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
161 | #endif |
162 | ||
163 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
164 | extern int unaligned_enabled; |
165 | #endif | |
1da177e4 | 166 | |
d2b176ed | 167 | #ifdef CONFIG_IA64 |
88fc241f | 168 | extern int unaligned_dump_stack; |
d2b176ed JS |
169 | #endif |
170 | ||
b6fca725 VG |
171 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
172 | extern int no_unaligned_warning; | |
173 | #endif | |
174 | ||
d6f8ff73 | 175 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 KC |
176 | |
177 | #define SYSCTL_WRITES_LEGACY -1 | |
178 | #define SYSCTL_WRITES_WARN 0 | |
179 | #define SYSCTL_WRITES_STRICT 1 | |
180 | ||
181 | static int sysctl_writes_strict = SYSCTL_WRITES_WARN; | |
182 | ||
8d65af78 | 183 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 184 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 185 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 186 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 187 | #endif |
9ec52099 | 188 | |
bfdc0b49 | 189 | #ifdef CONFIG_PRINTK |
620f6e8e | 190 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
191 | void __user *buffer, size_t *lenp, loff_t *ppos); |
192 | #endif | |
193 | ||
54b50199 KC |
194 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
195 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 196 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
197 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
198 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 199 | #endif |
54b50199 | 200 | |
97f5f0cd | 201 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 202 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 203 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd DT |
204 | |
205 | static int sysrq_sysctl_handler(ctl_table *table, int write, | |
206 | void __user *buffer, size_t *lenp, | |
207 | loff_t *ppos) | |
208 | { | |
209 | int error; | |
210 | ||
211 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
212 | if (error) | |
213 | return error; | |
214 | ||
215 | if (write) | |
216 | sysrq_toggle_support(__sysrq_enabled); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | #endif | |
222 | ||
d8217f07 EB |
223 | static struct ctl_table kern_table[]; |
224 | static struct ctl_table vm_table[]; | |
225 | static struct ctl_table fs_table[]; | |
226 | static struct ctl_table debug_table[]; | |
227 | static struct ctl_table dev_table[]; | |
228 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
229 | #ifdef CONFIG_EPOLL |
230 | extern struct ctl_table epoll_table[]; | |
231 | #endif | |
1da177e4 LT |
232 | |
233 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
234 | int sysctl_legacy_va_layout; | |
235 | #endif | |
236 | ||
1da177e4 LT |
237 | /* The default sysctl tables: */ |
238 | ||
de4e83bd | 239 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 240 | { |
1da177e4 LT |
241 | .procname = "kernel", |
242 | .mode = 0555, | |
243 | .child = kern_table, | |
244 | }, | |
245 | { | |
1da177e4 LT |
246 | .procname = "vm", |
247 | .mode = 0555, | |
248 | .child = vm_table, | |
249 | }, | |
1da177e4 | 250 | { |
1da177e4 LT |
251 | .procname = "fs", |
252 | .mode = 0555, | |
253 | .child = fs_table, | |
254 | }, | |
255 | { | |
1da177e4 LT |
256 | .procname = "debug", |
257 | .mode = 0555, | |
258 | .child = debug_table, | |
259 | }, | |
260 | { | |
1da177e4 LT |
261 | .procname = "dev", |
262 | .mode = 0555, | |
263 | .child = dev_table, | |
264 | }, | |
6fce56ec | 265 | { } |
1da177e4 LT |
266 | }; |
267 | ||
77e54a1f | 268 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
269 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
270 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
271 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
272 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 273 | #ifdef CONFIG_SMP |
1983a922 CE |
274 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
275 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
276 | #endif /* CONFIG_SMP */ |
277 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 278 | |
5e771905 MG |
279 | #ifdef CONFIG_COMPACTION |
280 | static int min_extfrag_threshold; | |
281 | static int max_extfrag_threshold = 1000; | |
282 | #endif | |
283 | ||
d8217f07 | 284 | static struct ctl_table kern_table[] = { |
2bba22c5 | 285 | { |
2bba22c5 MG |
286 | .procname = "sched_child_runs_first", |
287 | .data = &sysctl_sched_child_runs_first, | |
288 | .maxlen = sizeof(unsigned int), | |
289 | .mode = 0644, | |
6d456111 | 290 | .proc_handler = proc_dointvec, |
2bba22c5 | 291 | }, |
77e54a1f IM |
292 | #ifdef CONFIG_SCHED_DEBUG |
293 | { | |
b2be5e96 PZ |
294 | .procname = "sched_min_granularity_ns", |
295 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
296 | .maxlen = sizeof(unsigned int), |
297 | .mode = 0644, | |
702a7c76 | 298 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
299 | .extra1 = &min_sched_granularity_ns, |
300 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 301 | }, |
21805085 | 302 | { |
21805085 PZ |
303 | .procname = "sched_latency_ns", |
304 | .data = &sysctl_sched_latency, | |
305 | .maxlen = sizeof(unsigned int), | |
306 | .mode = 0644, | |
702a7c76 | 307 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
308 | .extra1 = &min_sched_granularity_ns, |
309 | .extra2 = &max_sched_granularity_ns, | |
310 | }, | |
77e54a1f | 311 | { |
77e54a1f IM |
312 | .procname = "sched_wakeup_granularity_ns", |
313 | .data = &sysctl_sched_wakeup_granularity, | |
314 | .maxlen = sizeof(unsigned int), | |
315 | .mode = 0644, | |
702a7c76 | 316 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
317 | .extra1 = &min_wakeup_granularity_ns, |
318 | .extra2 = &max_wakeup_granularity_ns, | |
319 | }, | |
cbee9f88 | 320 | #ifdef CONFIG_SMP |
1983a922 | 321 | { |
1983a922 CE |
322 | .procname = "sched_tunable_scaling", |
323 | .data = &sysctl_sched_tunable_scaling, | |
324 | .maxlen = sizeof(enum sched_tunable_scaling), | |
325 | .mode = 0644, | |
702a7c76 | 326 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
327 | .extra1 = &min_sched_tunable_scaling, |
328 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 329 | }, |
da84d961 | 330 | { |
d00535db | 331 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
332 | .data = &sysctl_sched_migration_cost, |
333 | .maxlen = sizeof(unsigned int), | |
334 | .mode = 0644, | |
6d456111 | 335 | .proc_handler = proc_dointvec, |
da84d961 | 336 | }, |
b82d9fdd | 337 | { |
b82d9fdd PZ |
338 | .procname = "sched_nr_migrate", |
339 | .data = &sysctl_sched_nr_migrate, | |
340 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 341 | .mode = 0644, |
6d456111 | 342 | .proc_handler = proc_dointvec, |
fa85ae24 | 343 | }, |
e9e9250b | 344 | { |
d00535db | 345 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
346 | .data = &sysctl_sched_time_avg, |
347 | .maxlen = sizeof(unsigned int), | |
348 | .mode = 0644, | |
6d456111 | 349 | .proc_handler = proc_dointvec, |
e9e9250b | 350 | }, |
a7a4f8a7 | 351 | { |
d00535db | 352 | .procname = "sched_shares_window_ns", |
a7a4f8a7 PT |
353 | .data = &sysctl_sched_shares_window, |
354 | .maxlen = sizeof(unsigned int), | |
355 | .mode = 0644, | |
356 | .proc_handler = proc_dointvec, | |
357 | }, | |
cd1bb94b | 358 | { |
cd1bb94b AB |
359 | .procname = "timer_migration", |
360 | .data = &sysctl_timer_migration, | |
361 | .maxlen = sizeof(unsigned int), | |
362 | .mode = 0644, | |
6d456111 | 363 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
364 | .extra1 = &zero, |
365 | .extra2 = &one, | |
fa85ae24 | 366 | }, |
cbee9f88 PZ |
367 | #endif /* CONFIG_SMP */ |
368 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
369 | { |
370 | .procname = "numa_balancing_scan_delay_ms", | |
371 | .data = &sysctl_numa_balancing_scan_delay, | |
372 | .maxlen = sizeof(unsigned int), | |
373 | .mode = 0644, | |
374 | .proc_handler = proc_dointvec, | |
375 | }, | |
cbee9f88 PZ |
376 | { |
377 | .procname = "numa_balancing_scan_period_min_ms", | |
378 | .data = &sysctl_numa_balancing_scan_period_min, | |
379 | .maxlen = sizeof(unsigned int), | |
380 | .mode = 0644, | |
381 | .proc_handler = proc_dointvec, | |
382 | }, | |
383 | { | |
384 | .procname = "numa_balancing_scan_period_max_ms", | |
385 | .data = &sysctl_numa_balancing_scan_period_max, | |
386 | .maxlen = sizeof(unsigned int), | |
387 | .mode = 0644, | |
388 | .proc_handler = proc_dointvec, | |
389 | }, | |
6e5fb223 PZ |
390 | { |
391 | .procname = "numa_balancing_scan_size_mb", | |
392 | .data = &sysctl_numa_balancing_scan_size, | |
393 | .maxlen = sizeof(unsigned int), | |
394 | .mode = 0644, | |
395 | .proc_handler = proc_dointvec, | |
396 | }, | |
54a43d54 AK |
397 | { |
398 | .procname = "numa_balancing", | |
399 | .data = NULL, /* filled in by handler */ | |
400 | .maxlen = sizeof(unsigned int), | |
401 | .mode = 0644, | |
402 | .proc_handler = sysctl_numa_balancing, | |
403 | .extra1 = &zero, | |
404 | .extra2 = &one, | |
405 | }, | |
cbee9f88 PZ |
406 | #endif /* CONFIG_NUMA_BALANCING */ |
407 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 408 | { |
9f0c1e56 PZ |
409 | .procname = "sched_rt_period_us", |
410 | .data = &sysctl_sched_rt_period, | |
411 | .maxlen = sizeof(unsigned int), | |
412 | .mode = 0644, | |
6d456111 | 413 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
414 | }, |
415 | { | |
9f0c1e56 PZ |
416 | .procname = "sched_rt_runtime_us", |
417 | .data = &sysctl_sched_rt_runtime, | |
418 | .maxlen = sizeof(int), | |
419 | .mode = 0644, | |
6d456111 | 420 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 421 | }, |
ce0dbbbb CW |
422 | { |
423 | .procname = "sched_rr_timeslice_ms", | |
424 | .data = &sched_rr_timeslice, | |
425 | .maxlen = sizeof(int), | |
426 | .mode = 0644, | |
427 | .proc_handler = sched_rr_handler, | |
428 | }, | |
5091faa4 MG |
429 | #ifdef CONFIG_SCHED_AUTOGROUP |
430 | { | |
431 | .procname = "sched_autogroup_enabled", | |
432 | .data = &sysctl_sched_autogroup_enabled, | |
433 | .maxlen = sizeof(unsigned int), | |
434 | .mode = 0644, | |
1747b21f | 435 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
436 | .extra1 = &zero, |
437 | .extra2 = &one, | |
438 | }, | |
439 | #endif | |
ec12cb7f PT |
440 | #ifdef CONFIG_CFS_BANDWIDTH |
441 | { | |
442 | .procname = "sched_cfs_bandwidth_slice_us", | |
443 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
444 | .maxlen = sizeof(unsigned int), | |
445 | .mode = 0644, | |
446 | .proc_handler = proc_dointvec_minmax, | |
447 | .extra1 = &one, | |
448 | }, | |
449 | #endif | |
f20786ff PZ |
450 | #ifdef CONFIG_PROVE_LOCKING |
451 | { | |
f20786ff PZ |
452 | .procname = "prove_locking", |
453 | .data = &prove_locking, | |
454 | .maxlen = sizeof(int), | |
455 | .mode = 0644, | |
6d456111 | 456 | .proc_handler = proc_dointvec, |
f20786ff PZ |
457 | }, |
458 | #endif | |
459 | #ifdef CONFIG_LOCK_STAT | |
460 | { | |
f20786ff PZ |
461 | .procname = "lock_stat", |
462 | .data = &lock_stat, | |
463 | .maxlen = sizeof(int), | |
464 | .mode = 0644, | |
6d456111 | 465 | .proc_handler = proc_dointvec, |
f20786ff | 466 | }, |
77e54a1f | 467 | #endif |
1da177e4 | 468 | { |
1da177e4 LT |
469 | .procname = "panic", |
470 | .data = &panic_timeout, | |
471 | .maxlen = sizeof(int), | |
472 | .mode = 0644, | |
6d456111 | 473 | .proc_handler = proc_dointvec, |
1da177e4 | 474 | }, |
046d662f | 475 | #ifdef CONFIG_COREDUMP |
1da177e4 | 476 | { |
1da177e4 LT |
477 | .procname = "core_uses_pid", |
478 | .data = &core_uses_pid, | |
479 | .maxlen = sizeof(int), | |
480 | .mode = 0644, | |
6d456111 | 481 | .proc_handler = proc_dointvec, |
1da177e4 LT |
482 | }, |
483 | { | |
1da177e4 LT |
484 | .procname = "core_pattern", |
485 | .data = core_pattern, | |
71ce92f3 | 486 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 487 | .mode = 0644, |
54b50199 | 488 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 489 | }, |
a293980c | 490 | { |
a293980c NH |
491 | .procname = "core_pipe_limit", |
492 | .data = &core_pipe_limit, | |
493 | .maxlen = sizeof(unsigned int), | |
494 | .mode = 0644, | |
6d456111 | 495 | .proc_handler = proc_dointvec, |
a293980c | 496 | }, |
046d662f | 497 | #endif |
34f5a398 | 498 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 499 | { |
1da177e4 | 500 | .procname = "tainted", |
25ddbb18 | 501 | .maxlen = sizeof(long), |
34f5a398 | 502 | .mode = 0644, |
6d456111 | 503 | .proc_handler = proc_taint, |
1da177e4 | 504 | }, |
f4aacea2 KC |
505 | { |
506 | .procname = "sysctl_writes_strict", | |
507 | .data = &sysctl_writes_strict, | |
508 | .maxlen = sizeof(int), | |
509 | .mode = 0644, | |
510 | .proc_handler = proc_dointvec_minmax, | |
511 | .extra1 = &neg_one, | |
512 | .extra2 = &one, | |
513 | }, | |
34f5a398 | 514 | #endif |
9745512c AV |
515 | #ifdef CONFIG_LATENCYTOP |
516 | { | |
517 | .procname = "latencytop", | |
518 | .data = &latencytop_enabled, | |
519 | .maxlen = sizeof(int), | |
520 | .mode = 0644, | |
6d456111 | 521 | .proc_handler = proc_dointvec, |
9745512c AV |
522 | }, |
523 | #endif | |
1da177e4 LT |
524 | #ifdef CONFIG_BLK_DEV_INITRD |
525 | { | |
1da177e4 LT |
526 | .procname = "real-root-dev", |
527 | .data = &real_root_dev, | |
528 | .maxlen = sizeof(int), | |
529 | .mode = 0644, | |
6d456111 | 530 | .proc_handler = proc_dointvec, |
1da177e4 LT |
531 | }, |
532 | #endif | |
45807a1d | 533 | { |
45807a1d IM |
534 | .procname = "print-fatal-signals", |
535 | .data = &print_fatal_signals, | |
536 | .maxlen = sizeof(int), | |
537 | .mode = 0644, | |
6d456111 | 538 | .proc_handler = proc_dointvec, |
45807a1d | 539 | }, |
72c57ed5 | 540 | #ifdef CONFIG_SPARC |
1da177e4 | 541 | { |
1da177e4 LT |
542 | .procname = "reboot-cmd", |
543 | .data = reboot_command, | |
544 | .maxlen = 256, | |
545 | .mode = 0644, | |
6d456111 | 546 | .proc_handler = proc_dostring, |
1da177e4 LT |
547 | }, |
548 | { | |
1da177e4 LT |
549 | .procname = "stop-a", |
550 | .data = &stop_a_enabled, | |
551 | .maxlen = sizeof (int), | |
552 | .mode = 0644, | |
6d456111 | 553 | .proc_handler = proc_dointvec, |
1da177e4 LT |
554 | }, |
555 | { | |
1da177e4 LT |
556 | .procname = "scons-poweroff", |
557 | .data = &scons_pwroff, | |
558 | .maxlen = sizeof (int), | |
559 | .mode = 0644, | |
6d456111 | 560 | .proc_handler = proc_dointvec, |
1da177e4 LT |
561 | }, |
562 | #endif | |
0871420f DM |
563 | #ifdef CONFIG_SPARC64 |
564 | { | |
0871420f DM |
565 | .procname = "tsb-ratio", |
566 | .data = &sysctl_tsb_ratio, | |
567 | .maxlen = sizeof (int), | |
568 | .mode = 0644, | |
6d456111 | 569 | .proc_handler = proc_dointvec, |
0871420f DM |
570 | }, |
571 | #endif | |
1da177e4 LT |
572 | #ifdef __hppa__ |
573 | { | |
1da177e4 LT |
574 | .procname = "soft-power", |
575 | .data = &pwrsw_enabled, | |
576 | .maxlen = sizeof (int), | |
577 | .mode = 0644, | |
6d456111 | 578 | .proc_handler = proc_dointvec, |
1da177e4 | 579 | }, |
bf14e3b9 VG |
580 | #endif |
581 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 582 | { |
1da177e4 LT |
583 | .procname = "unaligned-trap", |
584 | .data = &unaligned_enabled, | |
585 | .maxlen = sizeof (int), | |
586 | .mode = 0644, | |
6d456111 | 587 | .proc_handler = proc_dointvec, |
1da177e4 LT |
588 | }, |
589 | #endif | |
590 | { | |
1da177e4 LT |
591 | .procname = "ctrl-alt-del", |
592 | .data = &C_A_D, | |
593 | .maxlen = sizeof(int), | |
594 | .mode = 0644, | |
6d456111 | 595 | .proc_handler = proc_dointvec, |
1da177e4 | 596 | }, |
606576ce | 597 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 598 | { |
b0fc494f SR |
599 | .procname = "ftrace_enabled", |
600 | .data = &ftrace_enabled, | |
601 | .maxlen = sizeof(int), | |
602 | .mode = 0644, | |
6d456111 | 603 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
604 | }, |
605 | #endif | |
f38f1d2a SR |
606 | #ifdef CONFIG_STACK_TRACER |
607 | { | |
f38f1d2a SR |
608 | .procname = "stack_tracer_enabled", |
609 | .data = &stack_tracer_enabled, | |
610 | .maxlen = sizeof(int), | |
611 | .mode = 0644, | |
6d456111 | 612 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
613 | }, |
614 | #endif | |
944ac425 SR |
615 | #ifdef CONFIG_TRACING |
616 | { | |
3299b4dd | 617 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
618 | .data = &ftrace_dump_on_oops, |
619 | .maxlen = sizeof(int), | |
620 | .mode = 0644, | |
6d456111 | 621 | .proc_handler = proc_dointvec, |
944ac425 | 622 | }, |
de7edd31 SRRH |
623 | { |
624 | .procname = "traceoff_on_warning", | |
625 | .data = &__disable_trace_on_warning, | |
626 | .maxlen = sizeof(__disable_trace_on_warning), | |
627 | .mode = 0644, | |
628 | .proc_handler = proc_dointvec, | |
629 | }, | |
944ac425 | 630 | #endif |
7984754b KC |
631 | #ifdef CONFIG_KEXEC |
632 | { | |
633 | .procname = "kexec_load_disabled", | |
634 | .data = &kexec_load_disabled, | |
635 | .maxlen = sizeof(int), | |
636 | .mode = 0644, | |
637 | /* only handle a transition from default "0" to "1" */ | |
638 | .proc_handler = proc_dointvec_minmax, | |
639 | .extra1 = &one, | |
640 | .extra2 = &one, | |
641 | }, | |
642 | #endif | |
a1ef5adb | 643 | #ifdef CONFIG_MODULES |
1da177e4 | 644 | { |
1da177e4 LT |
645 | .procname = "modprobe", |
646 | .data = &modprobe_path, | |
647 | .maxlen = KMOD_PATH_LEN, | |
648 | .mode = 0644, | |
6d456111 | 649 | .proc_handler = proc_dostring, |
1da177e4 | 650 | }, |
3d43321b | 651 | { |
3d43321b KC |
652 | .procname = "modules_disabled", |
653 | .data = &modules_disabled, | |
654 | .maxlen = sizeof(int), | |
655 | .mode = 0644, | |
656 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 657 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
658 | .extra1 = &one, |
659 | .extra2 = &one, | |
660 | }, | |
1da177e4 | 661 | #endif |
86d56134 | 662 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 663 | { |
1da177e4 | 664 | .procname = "hotplug", |
312c004d KS |
665 | .data = &uevent_helper, |
666 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 667 | .mode = 0644, |
6d456111 | 668 | .proc_handler = proc_dostring, |
1da177e4 | 669 | }, |
86d56134 | 670 | #endif |
1da177e4 LT |
671 | #ifdef CONFIG_CHR_DEV_SG |
672 | { | |
1da177e4 LT |
673 | .procname = "sg-big-buff", |
674 | .data = &sg_big_buff, | |
675 | .maxlen = sizeof (int), | |
676 | .mode = 0444, | |
6d456111 | 677 | .proc_handler = proc_dointvec, |
1da177e4 LT |
678 | }, |
679 | #endif | |
680 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
681 | { | |
1da177e4 LT |
682 | .procname = "acct", |
683 | .data = &acct_parm, | |
684 | .maxlen = 3*sizeof(int), | |
685 | .mode = 0644, | |
6d456111 | 686 | .proc_handler = proc_dointvec, |
1da177e4 LT |
687 | }, |
688 | #endif | |
1da177e4 LT |
689 | #ifdef CONFIG_MAGIC_SYSRQ |
690 | { | |
1da177e4 | 691 | .procname = "sysrq", |
5d6f647f | 692 | .data = &__sysrq_enabled, |
1da177e4 LT |
693 | .maxlen = sizeof (int), |
694 | .mode = 0644, | |
97f5f0cd | 695 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
696 | }, |
697 | #endif | |
d6f8ff73 | 698 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 699 | { |
1da177e4 | 700 | .procname = "cad_pid", |
9ec52099 | 701 | .data = NULL, |
1da177e4 LT |
702 | .maxlen = sizeof (int), |
703 | .mode = 0600, | |
6d456111 | 704 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 705 | }, |
d6f8ff73 | 706 | #endif |
1da177e4 | 707 | { |
1da177e4 LT |
708 | .procname = "threads-max", |
709 | .data = &max_threads, | |
710 | .maxlen = sizeof(int), | |
711 | .mode = 0644, | |
6d456111 | 712 | .proc_handler = proc_dointvec, |
1da177e4 LT |
713 | }, |
714 | { | |
1da177e4 LT |
715 | .procname = "random", |
716 | .mode = 0555, | |
717 | .child = random_table, | |
718 | }, | |
17f60a7d EP |
719 | { |
720 | .procname = "usermodehelper", | |
721 | .mode = 0555, | |
722 | .child = usermodehelper_table, | |
723 | }, | |
1da177e4 | 724 | { |
1da177e4 LT |
725 | .procname = "overflowuid", |
726 | .data = &overflowuid, | |
727 | .maxlen = sizeof(int), | |
728 | .mode = 0644, | |
6d456111 | 729 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
730 | .extra1 = &minolduid, |
731 | .extra2 = &maxolduid, | |
732 | }, | |
733 | { | |
1da177e4 LT |
734 | .procname = "overflowgid", |
735 | .data = &overflowgid, | |
736 | .maxlen = sizeof(int), | |
737 | .mode = 0644, | |
6d456111 | 738 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
739 | .extra1 = &minolduid, |
740 | .extra2 = &maxolduid, | |
741 | }, | |
347a8dc3 | 742 | #ifdef CONFIG_S390 |
1da177e4 LT |
743 | #ifdef CONFIG_MATHEMU |
744 | { | |
1da177e4 LT |
745 | .procname = "ieee_emulation_warnings", |
746 | .data = &sysctl_ieee_emulation_warnings, | |
747 | .maxlen = sizeof(int), | |
748 | .mode = 0644, | |
6d456111 | 749 | .proc_handler = proc_dointvec, |
1da177e4 | 750 | }, |
1da177e4 LT |
751 | #endif |
752 | { | |
1da177e4 | 753 | .procname = "userprocess_debug", |
ab3c68ee | 754 | .data = &show_unhandled_signals, |
1da177e4 LT |
755 | .maxlen = sizeof(int), |
756 | .mode = 0644, | |
6d456111 | 757 | .proc_handler = proc_dointvec, |
1da177e4 LT |
758 | }, |
759 | #endif | |
760 | { | |
1da177e4 LT |
761 | .procname = "pid_max", |
762 | .data = &pid_max, | |
763 | .maxlen = sizeof (int), | |
764 | .mode = 0644, | |
6d456111 | 765 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
766 | .extra1 = &pid_max_min, |
767 | .extra2 = &pid_max_max, | |
768 | }, | |
769 | { | |
1da177e4 LT |
770 | .procname = "panic_on_oops", |
771 | .data = &panic_on_oops, | |
772 | .maxlen = sizeof(int), | |
773 | .mode = 0644, | |
6d456111 | 774 | .proc_handler = proc_dointvec, |
1da177e4 | 775 | }, |
7ef3d2fd JP |
776 | #if defined CONFIG_PRINTK |
777 | { | |
7ef3d2fd JP |
778 | .procname = "printk", |
779 | .data = &console_loglevel, | |
780 | .maxlen = 4*sizeof(int), | |
781 | .mode = 0644, | |
6d456111 | 782 | .proc_handler = proc_dointvec, |
7ef3d2fd | 783 | }, |
1da177e4 | 784 | { |
1da177e4 | 785 | .procname = "printk_ratelimit", |
717115e1 | 786 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
787 | .maxlen = sizeof(int), |
788 | .mode = 0644, | |
6d456111 | 789 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
790 | }, |
791 | { | |
1da177e4 | 792 | .procname = "printk_ratelimit_burst", |
717115e1 | 793 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
794 | .maxlen = sizeof(int), |
795 | .mode = 0644, | |
6d456111 | 796 | .proc_handler = proc_dointvec, |
1da177e4 | 797 | }, |
af91322e | 798 | { |
af91322e DY |
799 | .procname = "printk_delay", |
800 | .data = &printk_delay_msec, | |
801 | .maxlen = sizeof(int), | |
802 | .mode = 0644, | |
6d456111 | 803 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
804 | .extra1 = &zero, |
805 | .extra2 = &ten_thousand, | |
806 | }, | |
eaf06b24 DR |
807 | { |
808 | .procname = "dmesg_restrict", | |
809 | .data = &dmesg_restrict, | |
810 | .maxlen = sizeof(int), | |
811 | .mode = 0644, | |
620f6e8e | 812 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
813 | .extra1 = &zero, |
814 | .extra2 = &one, | |
815 | }, | |
455cd5ab DR |
816 | { |
817 | .procname = "kptr_restrict", | |
818 | .data = &kptr_restrict, | |
819 | .maxlen = sizeof(int), | |
820 | .mode = 0644, | |
620f6e8e | 821 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
822 | .extra1 = &zero, |
823 | .extra2 = &two, | |
824 | }, | |
df6e61d4 | 825 | #endif |
1da177e4 | 826 | { |
1da177e4 LT |
827 | .procname = "ngroups_max", |
828 | .data = &ngroups_max, | |
829 | .maxlen = sizeof (int), | |
830 | .mode = 0444, | |
6d456111 | 831 | .proc_handler = proc_dointvec, |
1da177e4 | 832 | }, |
73efc039 DB |
833 | { |
834 | .procname = "cap_last_cap", | |
835 | .data = (void *)&cap_last_cap, | |
836 | .maxlen = sizeof(int), | |
837 | .mode = 0444, | |
838 | .proc_handler = proc_dointvec, | |
839 | }, | |
58687acb | 840 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 841 | { |
58687acb | 842 | .procname = "watchdog", |
3c00ea82 | 843 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
844 | .maxlen = sizeof (int), |
845 | .mode = 0644, | |
586692a5 MSB |
846 | .proc_handler = proc_dowatchdog, |
847 | .extra1 = &zero, | |
848 | .extra2 = &one, | |
58687acb DZ |
849 | }, |
850 | { | |
851 | .procname = "watchdog_thresh", | |
586692a5 | 852 | .data = &watchdog_thresh, |
58687acb DZ |
853 | .maxlen = sizeof(int), |
854 | .mode = 0644, | |
586692a5 | 855 | .proc_handler = proc_dowatchdog, |
a6572f84 | 856 | .extra1 = &zero, |
58687acb | 857 | .extra2 = &sixty, |
504d7cf1 | 858 | }, |
2508ce18 DZ |
859 | { |
860 | .procname = "softlockup_panic", | |
861 | .data = &softlockup_panic, | |
862 | .maxlen = sizeof(int), | |
863 | .mode = 0644, | |
864 | .proc_handler = proc_dointvec_minmax, | |
865 | .extra1 = &zero, | |
866 | .extra2 = &one, | |
867 | }, | |
5dc30558 DZ |
868 | { |
869 | .procname = "nmi_watchdog", | |
3c00ea82 | 870 | .data = &watchdog_user_enabled, |
5dc30558 DZ |
871 | .maxlen = sizeof (int), |
872 | .mode = 0644, | |
586692a5 MSB |
873 | .proc_handler = proc_dowatchdog, |
874 | .extra1 = &zero, | |
875 | .extra2 = &one, | |
5dc30558 DZ |
876 | }, |
877 | #endif | |
878 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
879 | { | |
880 | .procname = "unknown_nmi_panic", | |
881 | .data = &unknown_nmi_panic, | |
882 | .maxlen = sizeof (int), | |
883 | .mode = 0644, | |
884 | .proc_handler = proc_dointvec, | |
885 | }, | |
504d7cf1 | 886 | #endif |
1da177e4 | 887 | #if defined(CONFIG_X86) |
8da5adda | 888 | { |
8da5adda DZ |
889 | .procname = "panic_on_unrecovered_nmi", |
890 | .data = &panic_on_unrecovered_nmi, | |
891 | .maxlen = sizeof(int), | |
892 | .mode = 0644, | |
6d456111 | 893 | .proc_handler = proc_dointvec, |
8da5adda | 894 | }, |
5211a242 | 895 | { |
5211a242 KG |
896 | .procname = "panic_on_io_nmi", |
897 | .data = &panic_on_io_nmi, | |
898 | .maxlen = sizeof(int), | |
899 | .mode = 0644, | |
6d456111 | 900 | .proc_handler = proc_dointvec, |
5211a242 | 901 | }, |
55af7796 MH |
902 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
903 | { | |
904 | .procname = "panic_on_stackoverflow", | |
905 | .data = &sysctl_panic_on_stackoverflow, | |
906 | .maxlen = sizeof(int), | |
907 | .mode = 0644, | |
908 | .proc_handler = proc_dointvec, | |
909 | }, | |
910 | #endif | |
1da177e4 | 911 | { |
1da177e4 LT |
912 | .procname = "bootloader_type", |
913 | .data = &bootloader_type, | |
914 | .maxlen = sizeof (int), | |
915 | .mode = 0444, | |
6d456111 | 916 | .proc_handler = proc_dointvec, |
1da177e4 | 917 | }, |
5031296c | 918 | { |
5031296c PA |
919 | .procname = "bootloader_version", |
920 | .data = &bootloader_version, | |
921 | .maxlen = sizeof (int), | |
922 | .mode = 0444, | |
6d456111 | 923 | .proc_handler = proc_dointvec, |
5031296c | 924 | }, |
0741f4d2 | 925 | { |
0741f4d2 CE |
926 | .procname = "kstack_depth_to_print", |
927 | .data = &kstack_depth_to_print, | |
928 | .maxlen = sizeof(int), | |
929 | .mode = 0644, | |
6d456111 | 930 | .proc_handler = proc_dointvec, |
0741f4d2 | 931 | }, |
6e7c4025 | 932 | { |
6e7c4025 IM |
933 | .procname = "io_delay_type", |
934 | .data = &io_delay_type, | |
935 | .maxlen = sizeof(int), | |
936 | .mode = 0644, | |
6d456111 | 937 | .proc_handler = proc_dointvec, |
6e7c4025 | 938 | }, |
1da177e4 | 939 | #endif |
7a9166e3 | 940 | #if defined(CONFIG_MMU) |
1da177e4 | 941 | { |
1da177e4 LT |
942 | .procname = "randomize_va_space", |
943 | .data = &randomize_va_space, | |
944 | .maxlen = sizeof(int), | |
945 | .mode = 0644, | |
6d456111 | 946 | .proc_handler = proc_dointvec, |
1da177e4 | 947 | }, |
7a9166e3 | 948 | #endif |
0152fb37 | 949 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 950 | { |
951f22d5 MS |
951 | .procname = "spin_retry", |
952 | .data = &spin_retry, | |
953 | .maxlen = sizeof (int), | |
954 | .mode = 0644, | |
6d456111 | 955 | .proc_handler = proc_dointvec, |
951f22d5 | 956 | }, |
c255d844 | 957 | #endif |
673d5b43 | 958 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 959 | { |
c255d844 | 960 | .procname = "acpi_video_flags", |
77afcf78 | 961 | .data = &acpi_realmode_flags, |
c255d844 PM |
962 | .maxlen = sizeof (unsigned long), |
963 | .mode = 0644, | |
6d456111 | 964 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 965 | }, |
d2b176ed | 966 | #endif |
b6fca725 | 967 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 968 | { |
d2b176ed JS |
969 | .procname = "ignore-unaligned-usertrap", |
970 | .data = &no_unaligned_warning, | |
971 | .maxlen = sizeof (int), | |
972 | .mode = 0644, | |
6d456111 | 973 | .proc_handler = proc_dointvec, |
d2b176ed | 974 | }, |
b6fca725 VG |
975 | #endif |
976 | #ifdef CONFIG_IA64 | |
88fc241f | 977 | { |
88fc241f DC |
978 | .procname = "unaligned-dump-stack", |
979 | .data = &unaligned_dump_stack, | |
980 | .maxlen = sizeof (int), | |
981 | .mode = 0644, | |
6d456111 | 982 | .proc_handler = proc_dointvec, |
88fc241f | 983 | }, |
bebfa101 | 984 | #endif |
e162b39a MSB |
985 | #ifdef CONFIG_DETECT_HUNG_TASK |
986 | { | |
e162b39a MSB |
987 | .procname = "hung_task_panic", |
988 | .data = &sysctl_hung_task_panic, | |
989 | .maxlen = sizeof(int), | |
990 | .mode = 0644, | |
6d456111 | 991 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
992 | .extra1 = &zero, |
993 | .extra2 = &one, | |
994 | }, | |
82a1fcb9 | 995 | { |
82a1fcb9 IM |
996 | .procname = "hung_task_check_count", |
997 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 998 | .maxlen = sizeof(int), |
82a1fcb9 | 999 | .mode = 0644, |
cd64647f LZ |
1000 | .proc_handler = proc_dointvec_minmax, |
1001 | .extra1 = &zero, | |
82a1fcb9 IM |
1002 | }, |
1003 | { | |
82a1fcb9 IM |
1004 | .procname = "hung_task_timeout_secs", |
1005 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1006 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1007 | .mode = 0644, |
6d456111 | 1008 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1009 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1010 | }, |
1011 | { | |
82a1fcb9 IM |
1012 | .procname = "hung_task_warnings", |
1013 | .data = &sysctl_hung_task_warnings, | |
270750db | 1014 | .maxlen = sizeof(int), |
82a1fcb9 | 1015 | .mode = 0644, |
270750db AT |
1016 | .proc_handler = proc_dointvec_minmax, |
1017 | .extra1 = &neg_one, | |
82a1fcb9 | 1018 | }, |
c4f3b63f | 1019 | #endif |
bebfa101 AK |
1020 | #ifdef CONFIG_COMPAT |
1021 | { | |
bebfa101 AK |
1022 | .procname = "compat-log", |
1023 | .data = &compat_log, | |
1024 | .maxlen = sizeof (int), | |
1025 | .mode = 0644, | |
6d456111 | 1026 | .proc_handler = proc_dointvec, |
bebfa101 | 1027 | }, |
951f22d5 | 1028 | #endif |
23f78d4a IM |
1029 | #ifdef CONFIG_RT_MUTEXES |
1030 | { | |
23f78d4a IM |
1031 | .procname = "max_lock_depth", |
1032 | .data = &max_lock_depth, | |
1033 | .maxlen = sizeof(int), | |
1034 | .mode = 0644, | |
6d456111 | 1035 | .proc_handler = proc_dointvec, |
23f78d4a | 1036 | }, |
5096add8 | 1037 | #endif |
10a0a8d4 | 1038 | { |
10a0a8d4 JF |
1039 | .procname = "poweroff_cmd", |
1040 | .data = &poweroff_cmd, | |
1041 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1042 | .mode = 0644, | |
6d456111 | 1043 | .proc_handler = proc_dostring, |
10a0a8d4 | 1044 | }, |
0b77f5bf DH |
1045 | #ifdef CONFIG_KEYS |
1046 | { | |
0b77f5bf DH |
1047 | .procname = "keys", |
1048 | .mode = 0555, | |
1049 | .child = key_sysctls, | |
1050 | }, | |
1051 | #endif | |
31a72bce PM |
1052 | #ifdef CONFIG_RCU_TORTURE_TEST |
1053 | { | |
31a72bce PM |
1054 | .procname = "rcutorture_runnable", |
1055 | .data = &rcutorture_runnable, | |
1056 | .maxlen = sizeof(int), | |
1057 | .mode = 0644, | |
6d456111 | 1058 | .proc_handler = proc_dointvec, |
31a72bce PM |
1059 | }, |
1060 | #endif | |
cdd6c482 | 1061 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1062 | /* |
1063 | * User-space scripts rely on the existence of this file | |
1064 | * as a feature check for perf_events being enabled. | |
1065 | * | |
1066 | * So it's an ABI, do not remove! | |
1067 | */ | |
1ccd1549 | 1068 | { |
cdd6c482 IM |
1069 | .procname = "perf_event_paranoid", |
1070 | .data = &sysctl_perf_event_paranoid, | |
1071 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1072 | .mode = 0644, |
6d456111 | 1073 | .proc_handler = proc_dointvec, |
1ccd1549 | 1074 | }, |
c5078f78 | 1075 | { |
cdd6c482 IM |
1076 | .procname = "perf_event_mlock_kb", |
1077 | .data = &sysctl_perf_event_mlock, | |
1078 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1079 | .mode = 0644, |
6d456111 | 1080 | .proc_handler = proc_dointvec, |
c5078f78 | 1081 | }, |
a78ac325 | 1082 | { |
cdd6c482 IM |
1083 | .procname = "perf_event_max_sample_rate", |
1084 | .data = &sysctl_perf_event_sample_rate, | |
1085 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1086 | .mode = 0644, |
163ec435 | 1087 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1088 | .extra1 = &one, |
a78ac325 | 1089 | }, |
14c63f17 DH |
1090 | { |
1091 | .procname = "perf_cpu_time_max_percent", | |
1092 | .data = &sysctl_perf_cpu_time_max_percent, | |
1093 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1094 | .mode = 0644, | |
1095 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1096 | .extra1 = &zero, | |
1097 | .extra2 = &one_hundred, | |
1098 | }, | |
1ccd1549 | 1099 | #endif |
dfec072e VN |
1100 | #ifdef CONFIG_KMEMCHECK |
1101 | { | |
dfec072e VN |
1102 | .procname = "kmemcheck", |
1103 | .data = &kmemcheck_enabled, | |
1104 | .maxlen = sizeof(int), | |
1105 | .mode = 0644, | |
6d456111 | 1106 | .proc_handler = proc_dointvec, |
dfec072e | 1107 | }, |
cb684b5b | 1108 | #endif |
6fce56ec | 1109 | { } |
1da177e4 LT |
1110 | }; |
1111 | ||
d8217f07 | 1112 | static struct ctl_table vm_table[] = { |
1da177e4 | 1113 | { |
1da177e4 LT |
1114 | .procname = "overcommit_memory", |
1115 | .data = &sysctl_overcommit_memory, | |
1116 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1117 | .mode = 0644, | |
cb16e95f PH |
1118 | .proc_handler = proc_dointvec_minmax, |
1119 | .extra1 = &zero, | |
1120 | .extra2 = &two, | |
1da177e4 | 1121 | }, |
fadd8fbd | 1122 | { |
fadd8fbd KH |
1123 | .procname = "panic_on_oom", |
1124 | .data = &sysctl_panic_on_oom, | |
1125 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1126 | .mode = 0644, | |
cb16e95f PH |
1127 | .proc_handler = proc_dointvec_minmax, |
1128 | .extra1 = &zero, | |
1129 | .extra2 = &two, | |
fadd8fbd | 1130 | }, |
fe071d7e | 1131 | { |
fe071d7e DR |
1132 | .procname = "oom_kill_allocating_task", |
1133 | .data = &sysctl_oom_kill_allocating_task, | |
1134 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1135 | .mode = 0644, | |
6d456111 | 1136 | .proc_handler = proc_dointvec, |
fe071d7e | 1137 | }, |
fef1bdd6 | 1138 | { |
fef1bdd6 DR |
1139 | .procname = "oom_dump_tasks", |
1140 | .data = &sysctl_oom_dump_tasks, | |
1141 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1142 | .mode = 0644, | |
6d456111 | 1143 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1144 | }, |
1da177e4 | 1145 | { |
1da177e4 LT |
1146 | .procname = "overcommit_ratio", |
1147 | .data = &sysctl_overcommit_ratio, | |
1148 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1149 | .mode = 0644, | |
49f0ce5f JM |
1150 | .proc_handler = overcommit_ratio_handler, |
1151 | }, | |
1152 | { | |
1153 | .procname = "overcommit_kbytes", | |
1154 | .data = &sysctl_overcommit_kbytes, | |
1155 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1156 | .mode = 0644, | |
1157 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1158 | }, |
1159 | { | |
1da177e4 LT |
1160 | .procname = "page-cluster", |
1161 | .data = &page_cluster, | |
1162 | .maxlen = sizeof(int), | |
1163 | .mode = 0644, | |
cb16e95f PH |
1164 | .proc_handler = proc_dointvec_minmax, |
1165 | .extra1 = &zero, | |
1da177e4 LT |
1166 | }, |
1167 | { | |
1da177e4 LT |
1168 | .procname = "dirty_background_ratio", |
1169 | .data = &dirty_background_ratio, | |
1170 | .maxlen = sizeof(dirty_background_ratio), | |
1171 | .mode = 0644, | |
6d456111 | 1172 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1173 | .extra1 = &zero, |
1174 | .extra2 = &one_hundred, | |
1175 | }, | |
2da02997 | 1176 | { |
2da02997 DR |
1177 | .procname = "dirty_background_bytes", |
1178 | .data = &dirty_background_bytes, | |
1179 | .maxlen = sizeof(dirty_background_bytes), | |
1180 | .mode = 0644, | |
6d456111 | 1181 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1182 | .extra1 = &one_ul, |
2da02997 | 1183 | }, |
1da177e4 | 1184 | { |
1da177e4 LT |
1185 | .procname = "dirty_ratio", |
1186 | .data = &vm_dirty_ratio, | |
1187 | .maxlen = sizeof(vm_dirty_ratio), | |
1188 | .mode = 0644, | |
6d456111 | 1189 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1190 | .extra1 = &zero, |
1191 | .extra2 = &one_hundred, | |
1192 | }, | |
2da02997 | 1193 | { |
2da02997 DR |
1194 | .procname = "dirty_bytes", |
1195 | .data = &vm_dirty_bytes, | |
1196 | .maxlen = sizeof(vm_dirty_bytes), | |
1197 | .mode = 0644, | |
6d456111 | 1198 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1199 | .extra1 = &dirty_bytes_min, |
2da02997 | 1200 | }, |
1da177e4 | 1201 | { |
1da177e4 | 1202 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1203 | .data = &dirty_writeback_interval, |
1204 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1205 | .mode = 0644, |
6d456111 | 1206 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1207 | }, |
1208 | { | |
1da177e4 | 1209 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1210 | .data = &dirty_expire_interval, |
1211 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1212 | .mode = 0644, |
cb16e95f PH |
1213 | .proc_handler = proc_dointvec_minmax, |
1214 | .extra1 = &zero, | |
1da177e4 LT |
1215 | }, |
1216 | { | |
3965c9ae WL |
1217 | .procname = "nr_pdflush_threads", |
1218 | .mode = 0444 /* read-only */, | |
1219 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1220 | }, |
1221 | { | |
1da177e4 LT |
1222 | .procname = "swappiness", |
1223 | .data = &vm_swappiness, | |
1224 | .maxlen = sizeof(vm_swappiness), | |
1225 | .mode = 0644, | |
6d456111 | 1226 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1227 | .extra1 = &zero, |
1228 | .extra2 = &one_hundred, | |
1229 | }, | |
1230 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1231 | { |
1da177e4 | 1232 | .procname = "nr_hugepages", |
e5ff2159 | 1233 | .data = NULL, |
1da177e4 LT |
1234 | .maxlen = sizeof(unsigned long), |
1235 | .mode = 0644, | |
6d456111 | 1236 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1237 | .extra1 = (void *)&hugetlb_zero, |
1238 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1239 | }, |
1240 | #ifdef CONFIG_NUMA | |
1241 | { | |
1242 | .procname = "nr_hugepages_mempolicy", | |
1243 | .data = NULL, | |
1244 | .maxlen = sizeof(unsigned long), | |
1245 | .mode = 0644, | |
1246 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1247 | .extra1 = (void *)&hugetlb_zero, | |
1248 | .extra2 = (void *)&hugetlb_infinity, | |
1249 | }, | |
1250 | #endif | |
1da177e4 | 1251 | { |
1da177e4 LT |
1252 | .procname = "hugetlb_shm_group", |
1253 | .data = &sysctl_hugetlb_shm_group, | |
1254 | .maxlen = sizeof(gid_t), | |
1255 | .mode = 0644, | |
6d456111 | 1256 | .proc_handler = proc_dointvec, |
1da177e4 | 1257 | }, |
396faf03 | 1258 | { |
396faf03 MG |
1259 | .procname = "hugepages_treat_as_movable", |
1260 | .data = &hugepages_treat_as_movable, | |
1261 | .maxlen = sizeof(int), | |
1262 | .mode = 0644, | |
86cdb465 | 1263 | .proc_handler = proc_dointvec, |
396faf03 | 1264 | }, |
d1c3fb1f | 1265 | { |
d1c3fb1f | 1266 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1267 | .data = NULL, |
1268 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1269 | .mode = 0644, |
6d456111 | 1270 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1271 | .extra1 = (void *)&hugetlb_zero, |
1272 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1273 | }, |
1da177e4 LT |
1274 | #endif |
1275 | { | |
1da177e4 LT |
1276 | .procname = "lowmem_reserve_ratio", |
1277 | .data = &sysctl_lowmem_reserve_ratio, | |
1278 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1279 | .mode = 0644, | |
6d456111 | 1280 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1281 | }, |
9d0243bc | 1282 | { |
9d0243bc AM |
1283 | .procname = "drop_caches", |
1284 | .data = &sysctl_drop_caches, | |
1285 | .maxlen = sizeof(int), | |
1286 | .mode = 0644, | |
1287 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1288 | .extra1 = &one, |
5509a5d2 | 1289 | .extra2 = &four, |
9d0243bc | 1290 | }, |
76ab0f53 MG |
1291 | #ifdef CONFIG_COMPACTION |
1292 | { | |
1293 | .procname = "compact_memory", | |
1294 | .data = &sysctl_compact_memory, | |
1295 | .maxlen = sizeof(int), | |
1296 | .mode = 0200, | |
1297 | .proc_handler = sysctl_compaction_handler, | |
1298 | }, | |
5e771905 MG |
1299 | { |
1300 | .procname = "extfrag_threshold", | |
1301 | .data = &sysctl_extfrag_threshold, | |
1302 | .maxlen = sizeof(int), | |
1303 | .mode = 0644, | |
1304 | .proc_handler = sysctl_extfrag_handler, | |
1305 | .extra1 = &min_extfrag_threshold, | |
1306 | .extra2 = &max_extfrag_threshold, | |
1307 | }, | |
1308 | ||
76ab0f53 | 1309 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1310 | { |
1da177e4 LT |
1311 | .procname = "min_free_kbytes", |
1312 | .data = &min_free_kbytes, | |
1313 | .maxlen = sizeof(min_free_kbytes), | |
1314 | .mode = 0644, | |
6d456111 | 1315 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1316 | .extra1 = &zero, |
1317 | }, | |
8ad4b1fb | 1318 | { |
8ad4b1fb RS |
1319 | .procname = "percpu_pagelist_fraction", |
1320 | .data = &percpu_pagelist_fraction, | |
1321 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1322 | .mode = 0644, | |
6d456111 | 1323 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1324 | .extra1 = &min_percpu_pagelist_fract, |
1325 | }, | |
1da177e4 LT |
1326 | #ifdef CONFIG_MMU |
1327 | { | |
1da177e4 LT |
1328 | .procname = "max_map_count", |
1329 | .data = &sysctl_max_map_count, | |
1330 | .maxlen = sizeof(sysctl_max_map_count), | |
1331 | .mode = 0644, | |
3e26120c | 1332 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1333 | .extra1 = &zero, |
1da177e4 | 1334 | }, |
dd8632a1 PM |
1335 | #else |
1336 | { | |
dd8632a1 PM |
1337 | .procname = "nr_trim_pages", |
1338 | .data = &sysctl_nr_trim_pages, | |
1339 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1340 | .mode = 0644, | |
6d456111 | 1341 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1342 | .extra1 = &zero, |
1343 | }, | |
1da177e4 LT |
1344 | #endif |
1345 | { | |
1da177e4 LT |
1346 | .procname = "laptop_mode", |
1347 | .data = &laptop_mode, | |
1348 | .maxlen = sizeof(laptop_mode), | |
1349 | .mode = 0644, | |
6d456111 | 1350 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1351 | }, |
1352 | { | |
1da177e4 LT |
1353 | .procname = "block_dump", |
1354 | .data = &block_dump, | |
1355 | .maxlen = sizeof(block_dump), | |
1356 | .mode = 0644, | |
6d456111 | 1357 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1358 | .extra1 = &zero, |
1359 | }, | |
1360 | { | |
1da177e4 LT |
1361 | .procname = "vfs_cache_pressure", |
1362 | .data = &sysctl_vfs_cache_pressure, | |
1363 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1364 | .mode = 0644, | |
6d456111 | 1365 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1366 | .extra1 = &zero, |
1367 | }, | |
1368 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1369 | { | |
1da177e4 LT |
1370 | .procname = "legacy_va_layout", |
1371 | .data = &sysctl_legacy_va_layout, | |
1372 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1373 | .mode = 0644, | |
6d456111 | 1374 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1375 | .extra1 = &zero, |
1376 | }, | |
1377 | #endif | |
1743660b CL |
1378 | #ifdef CONFIG_NUMA |
1379 | { | |
1743660b CL |
1380 | .procname = "zone_reclaim_mode", |
1381 | .data = &zone_reclaim_mode, | |
1382 | .maxlen = sizeof(zone_reclaim_mode), | |
1383 | .mode = 0644, | |
6d456111 | 1384 | .proc_handler = proc_dointvec, |
c84db23c | 1385 | .extra1 = &zero, |
1743660b | 1386 | }, |
9614634f | 1387 | { |
9614634f CL |
1388 | .procname = "min_unmapped_ratio", |
1389 | .data = &sysctl_min_unmapped_ratio, | |
1390 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1391 | .mode = 0644, | |
6d456111 | 1392 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1393 | .extra1 = &zero, |
1394 | .extra2 = &one_hundred, | |
1395 | }, | |
0ff38490 | 1396 | { |
0ff38490 CL |
1397 | .procname = "min_slab_ratio", |
1398 | .data = &sysctl_min_slab_ratio, | |
1399 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1400 | .mode = 0644, | |
6d456111 | 1401 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1402 | .extra1 = &zero, |
1403 | .extra2 = &one_hundred, | |
1404 | }, | |
e6e5494c | 1405 | #endif |
77461ab3 CL |
1406 | #ifdef CONFIG_SMP |
1407 | { | |
77461ab3 CL |
1408 | .procname = "stat_interval", |
1409 | .data = &sysctl_stat_interval, | |
1410 | .maxlen = sizeof(sysctl_stat_interval), | |
1411 | .mode = 0644, | |
6d456111 | 1412 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1413 | }, |
1414 | #endif | |
6e141546 | 1415 | #ifdef CONFIG_MMU |
ed032189 | 1416 | { |
ed032189 | 1417 | .procname = "mmap_min_addr", |
788084ab EP |
1418 | .data = &dac_mmap_min_addr, |
1419 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1420 | .mode = 0644, |
6d456111 | 1421 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1422 | }, |
6e141546 | 1423 | #endif |
f0c0b2b8 KH |
1424 | #ifdef CONFIG_NUMA |
1425 | { | |
f0c0b2b8 KH |
1426 | .procname = "numa_zonelist_order", |
1427 | .data = &numa_zonelist_order, | |
1428 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1429 | .mode = 0644, | |
6d456111 | 1430 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1431 | }, |
1432 | #endif | |
2b8232ce | 1433 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1434 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1435 | { |
e6e5494c | 1436 | .procname = "vdso_enabled", |
3d7ee969 AL |
1437 | #ifdef CONFIG_X86_32 |
1438 | .data = &vdso32_enabled, | |
1439 | .maxlen = sizeof(vdso32_enabled), | |
1440 | #else | |
e6e5494c IM |
1441 | .data = &vdso_enabled, |
1442 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1443 | #endif |
e6e5494c | 1444 | .mode = 0644, |
6d456111 | 1445 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1446 | .extra1 = &zero, |
1447 | }, | |
1da177e4 | 1448 | #endif |
195cf453 BG |
1449 | #ifdef CONFIG_HIGHMEM |
1450 | { | |
195cf453 BG |
1451 | .procname = "highmem_is_dirtyable", |
1452 | .data = &vm_highmem_is_dirtyable, | |
1453 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1454 | .mode = 0644, | |
6d456111 | 1455 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1456 | .extra1 = &zero, |
1457 | .extra2 = &one, | |
1458 | }, | |
1459 | #endif | |
4be6f6bb | 1460 | { |
4be6f6bb PZ |
1461 | .procname = "scan_unevictable_pages", |
1462 | .data = &scan_unevictable_pages, | |
1463 | .maxlen = sizeof(scan_unevictable_pages), | |
1464 | .mode = 0644, | |
6d456111 | 1465 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1466 | }, |
6a46079c AK |
1467 | #ifdef CONFIG_MEMORY_FAILURE |
1468 | { | |
6a46079c AK |
1469 | .procname = "memory_failure_early_kill", |
1470 | .data = &sysctl_memory_failure_early_kill, | |
1471 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1472 | .mode = 0644, | |
6d456111 | 1473 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1474 | .extra1 = &zero, |
1475 | .extra2 = &one, | |
1476 | }, | |
1477 | { | |
6a46079c AK |
1478 | .procname = "memory_failure_recovery", |
1479 | .data = &sysctl_memory_failure_recovery, | |
1480 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1481 | .mode = 0644, | |
6d456111 | 1482 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1483 | .extra1 = &zero, |
1484 | .extra2 = &one, | |
1485 | }, | |
1486 | #endif | |
c9b1d098 AS |
1487 | { |
1488 | .procname = "user_reserve_kbytes", | |
1489 | .data = &sysctl_user_reserve_kbytes, | |
1490 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1491 | .mode = 0644, | |
1492 | .proc_handler = proc_doulongvec_minmax, | |
1493 | }, | |
4eeab4f5 AS |
1494 | { |
1495 | .procname = "admin_reserve_kbytes", | |
1496 | .data = &sysctl_admin_reserve_kbytes, | |
1497 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1498 | .mode = 0644, | |
1499 | .proc_handler = proc_doulongvec_minmax, | |
1500 | }, | |
6fce56ec | 1501 | { } |
1da177e4 LT |
1502 | }; |
1503 | ||
2abc26fc | 1504 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1505 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1506 | { } |
2abc26fc EB |
1507 | }; |
1508 | #endif | |
1509 | ||
d8217f07 | 1510 | static struct ctl_table fs_table[] = { |
1da177e4 | 1511 | { |
1da177e4 LT |
1512 | .procname = "inode-nr", |
1513 | .data = &inodes_stat, | |
3942c07c | 1514 | .maxlen = 2*sizeof(long), |
1da177e4 | 1515 | .mode = 0444, |
cffbc8aa | 1516 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1517 | }, |
1518 | { | |
1da177e4 LT |
1519 | .procname = "inode-state", |
1520 | .data = &inodes_stat, | |
3942c07c | 1521 | .maxlen = 7*sizeof(long), |
1da177e4 | 1522 | .mode = 0444, |
cffbc8aa | 1523 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1524 | }, |
1525 | { | |
1da177e4 LT |
1526 | .procname = "file-nr", |
1527 | .data = &files_stat, | |
518de9b3 | 1528 | .maxlen = sizeof(files_stat), |
1da177e4 | 1529 | .mode = 0444, |
6d456111 | 1530 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1531 | }, |
1532 | { | |
1da177e4 LT |
1533 | .procname = "file-max", |
1534 | .data = &files_stat.max_files, | |
518de9b3 | 1535 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1536 | .mode = 0644, |
518de9b3 | 1537 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1538 | }, |
9cfe015a | 1539 | { |
9cfe015a ED |
1540 | .procname = "nr_open", |
1541 | .data = &sysctl_nr_open, | |
1542 | .maxlen = sizeof(int), | |
1543 | .mode = 0644, | |
6d456111 | 1544 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1545 | .extra1 = &sysctl_nr_open_min, |
1546 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1547 | }, |
1da177e4 | 1548 | { |
1da177e4 LT |
1549 | .procname = "dentry-state", |
1550 | .data = &dentry_stat, | |
3942c07c | 1551 | .maxlen = 6*sizeof(long), |
1da177e4 | 1552 | .mode = 0444, |
312d3ca8 | 1553 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1554 | }, |
1555 | { | |
1da177e4 LT |
1556 | .procname = "overflowuid", |
1557 | .data = &fs_overflowuid, | |
1558 | .maxlen = sizeof(int), | |
1559 | .mode = 0644, | |
6d456111 | 1560 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1561 | .extra1 = &minolduid, |
1562 | .extra2 = &maxolduid, | |
1563 | }, | |
1564 | { | |
1da177e4 LT |
1565 | .procname = "overflowgid", |
1566 | .data = &fs_overflowgid, | |
1567 | .maxlen = sizeof(int), | |
1568 | .mode = 0644, | |
6d456111 | 1569 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1570 | .extra1 = &minolduid, |
1571 | .extra2 = &maxolduid, | |
1572 | }, | |
bfcd17a6 | 1573 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1574 | { |
1da177e4 LT |
1575 | .procname = "leases-enable", |
1576 | .data = &leases_enable, | |
1577 | .maxlen = sizeof(int), | |
1578 | .mode = 0644, | |
6d456111 | 1579 | .proc_handler = proc_dointvec, |
1da177e4 | 1580 | }, |
bfcd17a6 | 1581 | #endif |
1da177e4 LT |
1582 | #ifdef CONFIG_DNOTIFY |
1583 | { | |
1da177e4 LT |
1584 | .procname = "dir-notify-enable", |
1585 | .data = &dir_notify_enable, | |
1586 | .maxlen = sizeof(int), | |
1587 | .mode = 0644, | |
6d456111 | 1588 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1589 | }, |
1590 | #endif | |
1591 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1592 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1593 | { |
1da177e4 LT |
1594 | .procname = "lease-break-time", |
1595 | .data = &lease_break_time, | |
1596 | .maxlen = sizeof(int), | |
1597 | .mode = 0644, | |
6d456111 | 1598 | .proc_handler = proc_dointvec, |
1da177e4 | 1599 | }, |
bfcd17a6 | 1600 | #endif |
ebf3f09c | 1601 | #ifdef CONFIG_AIO |
1da177e4 | 1602 | { |
1da177e4 LT |
1603 | .procname = "aio-nr", |
1604 | .data = &aio_nr, | |
1605 | .maxlen = sizeof(aio_nr), | |
1606 | .mode = 0444, | |
6d456111 | 1607 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1608 | }, |
1609 | { | |
1da177e4 LT |
1610 | .procname = "aio-max-nr", |
1611 | .data = &aio_max_nr, | |
1612 | .maxlen = sizeof(aio_max_nr), | |
1613 | .mode = 0644, | |
6d456111 | 1614 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1615 | }, |
ebf3f09c | 1616 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1617 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1618 | { |
0399cb08 RL |
1619 | .procname = "inotify", |
1620 | .mode = 0555, | |
1621 | .child = inotify_table, | |
1622 | }, | |
1623 | #endif | |
7ef9964e DL |
1624 | #ifdef CONFIG_EPOLL |
1625 | { | |
1626 | .procname = "epoll", | |
1627 | .mode = 0555, | |
1628 | .child = epoll_table, | |
1629 | }, | |
1630 | #endif | |
1da177e4 | 1631 | #endif |
800179c9 KC |
1632 | { |
1633 | .procname = "protected_symlinks", | |
1634 | .data = &sysctl_protected_symlinks, | |
1635 | .maxlen = sizeof(int), | |
1636 | .mode = 0600, | |
1637 | .proc_handler = proc_dointvec_minmax, | |
1638 | .extra1 = &zero, | |
1639 | .extra2 = &one, | |
1640 | }, | |
1641 | { | |
1642 | .procname = "protected_hardlinks", | |
1643 | .data = &sysctl_protected_hardlinks, | |
1644 | .maxlen = sizeof(int), | |
1645 | .mode = 0600, | |
1646 | .proc_handler = proc_dointvec_minmax, | |
1647 | .extra1 = &zero, | |
1648 | .extra2 = &one, | |
1649 | }, | |
d6e71144 | 1650 | { |
d6e71144 AC |
1651 | .procname = "suid_dumpable", |
1652 | .data = &suid_dumpable, | |
1653 | .maxlen = sizeof(int), | |
1654 | .mode = 0644, | |
54b50199 | 1655 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1656 | .extra1 = &zero, |
1657 | .extra2 = &two, | |
d6e71144 | 1658 | }, |
2abc26fc EB |
1659 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1660 | { | |
2abc26fc EB |
1661 | .procname = "binfmt_misc", |
1662 | .mode = 0555, | |
1663 | .child = binfmt_misc_table, | |
1664 | }, | |
1665 | #endif | |
b492e95b | 1666 | { |
ff9da691 JA |
1667 | .procname = "pipe-max-size", |
1668 | .data = &pipe_max_size, | |
b492e95b JA |
1669 | .maxlen = sizeof(int), |
1670 | .mode = 0644, | |
ff9da691 JA |
1671 | .proc_handler = &pipe_proc_fn, |
1672 | .extra1 = &pipe_min_size, | |
b492e95b | 1673 | }, |
6fce56ec | 1674 | { } |
1da177e4 LT |
1675 | }; |
1676 | ||
d8217f07 | 1677 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1678 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1679 | { |
abd4f750 MAS |
1680 | .procname = "exception-trace", |
1681 | .data = &show_unhandled_signals, | |
1682 | .maxlen = sizeof(int), | |
1683 | .mode = 0644, | |
1684 | .proc_handler = proc_dointvec | |
1685 | }, | |
b2be84df MH |
1686 | #endif |
1687 | #if defined(CONFIG_OPTPROBES) | |
1688 | { | |
1689 | .procname = "kprobes-optimization", | |
1690 | .data = &sysctl_kprobes_optimization, | |
1691 | .maxlen = sizeof(int), | |
1692 | .mode = 0644, | |
1693 | .proc_handler = proc_kprobes_optimization_handler, | |
1694 | .extra1 = &zero, | |
1695 | .extra2 = &one, | |
1696 | }, | |
abd4f750 | 1697 | #endif |
6fce56ec | 1698 | { } |
1da177e4 LT |
1699 | }; |
1700 | ||
d8217f07 | 1701 | static struct ctl_table dev_table[] = { |
6fce56ec | 1702 | { } |
0eeca283 | 1703 | }; |
1da177e4 | 1704 | |
de4e83bd | 1705 | int __init sysctl_init(void) |
d912b0cc | 1706 | { |
fd4b616b SR |
1707 | struct ctl_table_header *hdr; |
1708 | ||
1709 | hdr = register_sysctl_table(sysctl_base_table); | |
1710 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1711 | return 0; |
1712 | } | |
1713 | ||
b89a8171 EB |
1714 | #endif /* CONFIG_SYSCTL */ |
1715 | ||
1da177e4 LT |
1716 | /* |
1717 | * /proc/sys support | |
1718 | */ | |
1719 | ||
b89a8171 | 1720 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1721 | |
f8808300 KC |
1722 | static int _proc_do_string(char *data, int maxlen, int write, |
1723 | char __user *buffer, | |
b1ba4ddd | 1724 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1725 | { |
1726 | size_t len; | |
1727 | char __user *p; | |
1728 | char c; | |
8d060877 ON |
1729 | |
1730 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1731 | *lenp = 0; |
1732 | return 0; | |
1733 | } | |
8d060877 | 1734 | |
1da177e4 | 1735 | if (write) { |
f4aacea2 KC |
1736 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1737 | /* Only continue writes not past the end of buffer. */ | |
1738 | len = strlen(data); | |
1739 | if (len > maxlen - 1) | |
1740 | len = maxlen - 1; | |
1741 | ||
1742 | if (*ppos > len) | |
1743 | return 0; | |
1744 | len = *ppos; | |
1745 | } else { | |
1746 | /* Start writing from beginning of buffer. */ | |
1747 | len = 0; | |
1748 | } | |
1749 | ||
2ca9bb45 | 1750 | *ppos += *lenp; |
1da177e4 | 1751 | p = buffer; |
2ca9bb45 | 1752 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1753 | if (get_user(c, p++)) |
1754 | return -EFAULT; | |
1755 | if (c == 0 || c == '\n') | |
1756 | break; | |
2ca9bb45 | 1757 | data[len++] = c; |
1da177e4 | 1758 | } |
f8808300 | 1759 | data[len] = 0; |
1da177e4 | 1760 | } else { |
f5dd3d6f SV |
1761 | len = strlen(data); |
1762 | if (len > maxlen) | |
1763 | len = maxlen; | |
8d060877 ON |
1764 | |
1765 | if (*ppos > len) { | |
1766 | *lenp = 0; | |
1767 | return 0; | |
1768 | } | |
1769 | ||
1770 | data += *ppos; | |
1771 | len -= *ppos; | |
1772 | ||
1da177e4 LT |
1773 | if (len > *lenp) |
1774 | len = *lenp; | |
1775 | if (len) | |
f8808300 | 1776 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1777 | return -EFAULT; |
1778 | if (len < *lenp) { | |
f8808300 | 1779 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1780 | return -EFAULT; |
1781 | len++; | |
1782 | } | |
1783 | *lenp = len; | |
1784 | *ppos += len; | |
1785 | } | |
1786 | return 0; | |
1787 | } | |
1788 | ||
f4aacea2 KC |
1789 | static void warn_sysctl_write(struct ctl_table *table) |
1790 | { | |
1791 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1792 | "This will not be supported in the future. To silence this\n" | |
1793 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1794 | current->comm, table->procname); | |
1795 | } | |
1796 | ||
f5dd3d6f SV |
1797 | /** |
1798 | * proc_dostring - read a string sysctl | |
1799 | * @table: the sysctl table | |
1800 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1801 | * @buffer: the user buffer |
1802 | * @lenp: the size of the user buffer | |
1803 | * @ppos: file position | |
1804 | * | |
1805 | * Reads/writes a string from/to the user buffer. If the kernel | |
1806 | * buffer provided is not large enough to hold the string, the | |
1807 | * string is truncated. The copied string is %NULL-terminated. | |
1808 | * If the string is being read by the user process, it is copied | |
1809 | * and a newline '\n' is added. It is truncated if the buffer is | |
1810 | * not large enough. | |
1811 | * | |
1812 | * Returns 0 on success. | |
1813 | */ | |
8d65af78 | 1814 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1815 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1816 | { | |
f4aacea2 KC |
1817 | if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) |
1818 | warn_sysctl_write(table); | |
1819 | ||
f8808300 KC |
1820 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
1821 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
1822 | } |
1823 | ||
00b7c339 AW |
1824 | static size_t proc_skip_spaces(char **buf) |
1825 | { | |
1826 | size_t ret; | |
1827 | char *tmp = skip_spaces(*buf); | |
1828 | ret = tmp - *buf; | |
1829 | *buf = tmp; | |
1830 | return ret; | |
1831 | } | |
1832 | ||
9f977fb7 OP |
1833 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1834 | { | |
1835 | while (*size) { | |
1836 | if (**buf != v) | |
1837 | break; | |
1838 | (*size)--; | |
1839 | (*buf)++; | |
1840 | } | |
1841 | } | |
1842 | ||
00b7c339 AW |
1843 | #define TMPBUFLEN 22 |
1844 | /** | |
0fc377bd | 1845 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1846 | * |
0fc377bd RD |
1847 | * @buf: a kernel buffer |
1848 | * @size: size of the kernel buffer | |
1849 | * @val: this is where the number will be stored | |
1850 | * @neg: set to %TRUE if number is negative | |
1851 | * @perm_tr: a vector which contains the allowed trailers | |
1852 | * @perm_tr_len: size of the perm_tr vector | |
1853 | * @tr: pointer to store the trailer character | |
00b7c339 | 1854 | * |
0fc377bd RD |
1855 | * In case of success %0 is returned and @buf and @size are updated with |
1856 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1857 | * character exists (size is non-zero after returning from this | |
1858 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1859 | */ |
1860 | static int proc_get_long(char **buf, size_t *size, | |
1861 | unsigned long *val, bool *neg, | |
1862 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1863 | { | |
1864 | int len; | |
1865 | char *p, tmp[TMPBUFLEN]; | |
1866 | ||
1867 | if (!*size) | |
1868 | return -EINVAL; | |
1869 | ||
1870 | len = *size; | |
1871 | if (len > TMPBUFLEN - 1) | |
1872 | len = TMPBUFLEN - 1; | |
1873 | ||
1874 | memcpy(tmp, *buf, len); | |
1875 | ||
1876 | tmp[len] = 0; | |
1877 | p = tmp; | |
1878 | if (*p == '-' && *size > 1) { | |
1879 | *neg = true; | |
1880 | p++; | |
1881 | } else | |
1882 | *neg = false; | |
1883 | if (!isdigit(*p)) | |
1884 | return -EINVAL; | |
1885 | ||
1886 | *val = simple_strtoul(p, &p, 0); | |
1887 | ||
1888 | len = p - tmp; | |
1889 | ||
1890 | /* We don't know if the next char is whitespace thus we may accept | |
1891 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
1892 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
1893 | if (len == TMPBUFLEN - 1) | |
1894 | return -EINVAL; | |
1895 | ||
1896 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
1897 | return -EINVAL; | |
1da177e4 | 1898 | |
00b7c339 AW |
1899 | if (tr && (len < *size)) |
1900 | *tr = *p; | |
1901 | ||
1902 | *buf += len; | |
1903 | *size -= len; | |
1904 | ||
1905 | return 0; | |
1906 | } | |
1907 | ||
1908 | /** | |
0fc377bd | 1909 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 1910 | * |
0fc377bd RD |
1911 | * @buf: the user buffer |
1912 | * @size: the size of the user buffer | |
1913 | * @val: the integer to be converted | |
1914 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 1915 | * |
0fc377bd RD |
1916 | * In case of success %0 is returned and @buf and @size are updated with |
1917 | * the amount of bytes written. | |
00b7c339 AW |
1918 | */ |
1919 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
1920 | bool neg) | |
1921 | { | |
1922 | int len; | |
1923 | char tmp[TMPBUFLEN], *p = tmp; | |
1924 | ||
1925 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
1926 | len = strlen(tmp); | |
1927 | if (len > *size) | |
1928 | len = *size; | |
1929 | if (copy_to_user(*buf, tmp, len)) | |
1930 | return -EFAULT; | |
1931 | *size -= len; | |
1932 | *buf += len; | |
1933 | return 0; | |
1934 | } | |
1935 | #undef TMPBUFLEN | |
1936 | ||
1937 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
1938 | { | |
1939 | if (*size) { | |
1940 | char __user **buffer = (char __user **)buf; | |
1941 | if (put_user(c, *buffer)) | |
1942 | return -EFAULT; | |
1943 | (*size)--, (*buffer)++; | |
1944 | *buf = *buffer; | |
1945 | } | |
1946 | return 0; | |
1947 | } | |
1da177e4 | 1948 | |
00b7c339 | 1949 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1950 | int *valp, |
1951 | int write, void *data) | |
1952 | { | |
1953 | if (write) { | |
1954 | *valp = *negp ? -*lvalp : *lvalp; | |
1955 | } else { | |
1956 | int val = *valp; | |
1957 | if (val < 0) { | |
00b7c339 | 1958 | *negp = true; |
1da177e4 LT |
1959 | *lvalp = (unsigned long)-val; |
1960 | } else { | |
00b7c339 | 1961 | *negp = false; |
1da177e4 LT |
1962 | *lvalp = (unsigned long)val; |
1963 | } | |
1964 | } | |
1965 | return 0; | |
1966 | } | |
1967 | ||
00b7c339 AW |
1968 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
1969 | ||
d8217f07 | 1970 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 1971 | int write, void __user *buffer, |
fcfbd547 | 1972 | size_t *lenp, loff_t *ppos, |
00b7c339 | 1973 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
1974 | int write, void *data), |
1975 | void *data) | |
1976 | { | |
00b7c339 AW |
1977 | int *i, vleft, first = 1, err = 0; |
1978 | unsigned long page = 0; | |
1979 | size_t left; | |
1980 | char *kbuf; | |
1da177e4 | 1981 | |
00b7c339 | 1982 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
1983 | *lenp = 0; |
1984 | return 0; | |
1985 | } | |
1986 | ||
fcfbd547 | 1987 | i = (int *) tbl_data; |
1da177e4 LT |
1988 | vleft = table->maxlen / sizeof(*i); |
1989 | left = *lenp; | |
1990 | ||
1991 | if (!conv) | |
1992 | conv = do_proc_dointvec_conv; | |
1993 | ||
00b7c339 | 1994 | if (write) { |
f4aacea2 KC |
1995 | if (*ppos) { |
1996 | switch (sysctl_writes_strict) { | |
1997 | case SYSCTL_WRITES_STRICT: | |
1998 | goto out; | |
1999 | case SYSCTL_WRITES_WARN: | |
2000 | warn_sysctl_write(table); | |
2001 | break; | |
2002 | default: | |
2003 | break; | |
2004 | } | |
2005 | } | |
2006 | ||
00b7c339 AW |
2007 | if (left > PAGE_SIZE - 1) |
2008 | left = PAGE_SIZE - 1; | |
2009 | page = __get_free_page(GFP_TEMPORARY); | |
2010 | kbuf = (char *) page; | |
2011 | if (!kbuf) | |
2012 | return -ENOMEM; | |
2013 | if (copy_from_user(kbuf, buffer, left)) { | |
2014 | err = -EFAULT; | |
2015 | goto free; | |
2016 | } | |
2017 | kbuf[left] = 0; | |
2018 | } | |
2019 | ||
1da177e4 | 2020 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2021 | unsigned long lval; |
2022 | bool neg; | |
1da177e4 | 2023 | |
00b7c339 AW |
2024 | if (write) { |
2025 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 2026 | |
563b0467 O |
2027 | if (!left) |
2028 | break; | |
00b7c339 AW |
2029 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
2030 | proc_wspace_sep, | |
2031 | sizeof(proc_wspace_sep), NULL); | |
2032 | if (err) | |
1da177e4 | 2033 | break; |
00b7c339 AW |
2034 | if (conv(&neg, &lval, i, 1, data)) { |
2035 | err = -EINVAL; | |
1da177e4 | 2036 | break; |
00b7c339 | 2037 | } |
1da177e4 | 2038 | } else { |
00b7c339 AW |
2039 | if (conv(&neg, &lval, i, 0, data)) { |
2040 | err = -EINVAL; | |
2041 | break; | |
2042 | } | |
1da177e4 | 2043 | if (!first) |
00b7c339 AW |
2044 | err = proc_put_char(&buffer, &left, '\t'); |
2045 | if (err) | |
2046 | break; | |
2047 | err = proc_put_long(&buffer, &left, lval, neg); | |
2048 | if (err) | |
1da177e4 | 2049 | break; |
1da177e4 LT |
2050 | } |
2051 | } | |
2052 | ||
00b7c339 AW |
2053 | if (!write && !first && left && !err) |
2054 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2055 | if (write && !err && left) |
00b7c339 AW |
2056 | left -= proc_skip_spaces(&kbuf); |
2057 | free: | |
1da177e4 | 2058 | if (write) { |
00b7c339 AW |
2059 | free_page(page); |
2060 | if (first) | |
2061 | return err ? : -EINVAL; | |
1da177e4 | 2062 | } |
1da177e4 | 2063 | *lenp -= left; |
f4aacea2 | 2064 | out: |
1da177e4 | 2065 | *ppos += *lenp; |
00b7c339 | 2066 | return err; |
1da177e4 LT |
2067 | } |
2068 | ||
8d65af78 | 2069 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2070 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2071 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2072 | int write, void *data), |
2073 | void *data) | |
2074 | { | |
8d65af78 | 2075 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2076 | buffer, lenp, ppos, conv, data); |
2077 | } | |
2078 | ||
1da177e4 LT |
2079 | /** |
2080 | * proc_dointvec - read a vector of integers | |
2081 | * @table: the sysctl table | |
2082 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2083 | * @buffer: the user buffer |
2084 | * @lenp: the size of the user buffer | |
2085 | * @ppos: file position | |
2086 | * | |
2087 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2088 | * values from/to the user buffer, treated as an ASCII string. | |
2089 | * | |
2090 | * Returns 0 on success. | |
2091 | */ | |
8d65af78 | 2092 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2093 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2094 | { | |
8d65af78 | 2095 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2096 | NULL,NULL); |
2097 | } | |
2098 | ||
34f5a398 | 2099 | /* |
25ddbb18 AK |
2100 | * Taint values can only be increased |
2101 | * This means we can safely use a temporary. | |
34f5a398 | 2102 | */ |
8d65af78 | 2103 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2104 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2105 | { | |
25ddbb18 AK |
2106 | struct ctl_table t; |
2107 | unsigned long tmptaint = get_taint(); | |
2108 | int err; | |
34f5a398 | 2109 | |
91fcd412 | 2110 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2111 | return -EPERM; |
2112 | ||
25ddbb18 AK |
2113 | t = *table; |
2114 | t.data = &tmptaint; | |
8d65af78 | 2115 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2116 | if (err < 0) |
2117 | return err; | |
2118 | ||
2119 | if (write) { | |
2120 | /* | |
2121 | * Poor man's atomic or. Not worth adding a primitive | |
2122 | * to everyone's atomic.h for this | |
2123 | */ | |
2124 | int i; | |
2125 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2126 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2127 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2128 | } |
2129 | } | |
2130 | ||
2131 | return err; | |
34f5a398 TT |
2132 | } |
2133 | ||
bfdc0b49 | 2134 | #ifdef CONFIG_PRINTK |
620f6e8e | 2135 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2136 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2137 | { | |
2138 | if (write && !capable(CAP_SYS_ADMIN)) | |
2139 | return -EPERM; | |
2140 | ||
2141 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2142 | } | |
2143 | #endif | |
2144 | ||
1da177e4 LT |
2145 | struct do_proc_dointvec_minmax_conv_param { |
2146 | int *min; | |
2147 | int *max; | |
2148 | }; | |
2149 | ||
00b7c339 AW |
2150 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2151 | int *valp, | |
1da177e4 LT |
2152 | int write, void *data) |
2153 | { | |
2154 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2155 | if (write) { | |
2156 | int val = *negp ? -*lvalp : *lvalp; | |
2157 | if ((param->min && *param->min > val) || | |
2158 | (param->max && *param->max < val)) | |
2159 | return -EINVAL; | |
2160 | *valp = val; | |
2161 | } else { | |
2162 | int val = *valp; | |
2163 | if (val < 0) { | |
00b7c339 | 2164 | *negp = true; |
1da177e4 LT |
2165 | *lvalp = (unsigned long)-val; |
2166 | } else { | |
00b7c339 | 2167 | *negp = false; |
1da177e4 LT |
2168 | *lvalp = (unsigned long)val; |
2169 | } | |
2170 | } | |
2171 | return 0; | |
2172 | } | |
2173 | ||
2174 | /** | |
2175 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2176 | * @table: the sysctl table | |
2177 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2178 | * @buffer: the user buffer |
2179 | * @lenp: the size of the user buffer | |
2180 | * @ppos: file position | |
2181 | * | |
2182 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2183 | * values from/to the user buffer, treated as an ASCII string. | |
2184 | * | |
2185 | * This routine will ensure the values are within the range specified by | |
2186 | * table->extra1 (min) and table->extra2 (max). | |
2187 | * | |
2188 | * Returns 0 on success. | |
2189 | */ | |
8d65af78 | 2190 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2191 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2192 | { | |
2193 | struct do_proc_dointvec_minmax_conv_param param = { | |
2194 | .min = (int *) table->extra1, | |
2195 | .max = (int *) table->extra2, | |
2196 | }; | |
8d65af78 | 2197 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2198 | do_proc_dointvec_minmax_conv, ¶m); |
2199 | } | |
2200 | ||
54b50199 KC |
2201 | static void validate_coredump_safety(void) |
2202 | { | |
046d662f | 2203 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2204 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 KC |
2205 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
2206 | printk(KERN_WARNING "Unsafe core_pattern used with "\ | |
2207 | "suid_dumpable=2. Pipe handler or fully qualified "\ | |
2208 | "core dump path required.\n"); | |
2209 | } | |
046d662f | 2210 | #endif |
54b50199 KC |
2211 | } |
2212 | ||
2213 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2214 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2215 | { | |
2216 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2217 | if (!error) | |
2218 | validate_coredump_safety(); | |
2219 | return error; | |
2220 | } | |
2221 | ||
046d662f | 2222 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2223 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2224 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2225 | { | |
2226 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2227 | if (!error) | |
2228 | validate_coredump_safety(); | |
2229 | return error; | |
2230 | } | |
046d662f | 2231 | #endif |
54b50199 | 2232 | |
d8217f07 | 2233 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2234 | void __user *buffer, |
2235 | size_t *lenp, loff_t *ppos, | |
2236 | unsigned long convmul, | |
2237 | unsigned long convdiv) | |
2238 | { | |
00b7c339 AW |
2239 | unsigned long *i, *min, *max; |
2240 | int vleft, first = 1, err = 0; | |
2241 | unsigned long page = 0; | |
2242 | size_t left; | |
2243 | char *kbuf; | |
2244 | ||
2245 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2246 | *lenp = 0; |
2247 | return 0; | |
2248 | } | |
00b7c339 | 2249 | |
fcfbd547 | 2250 | i = (unsigned long *) data; |
1da177e4 LT |
2251 | min = (unsigned long *) table->extra1; |
2252 | max = (unsigned long *) table->extra2; | |
2253 | vleft = table->maxlen / sizeof(unsigned long); | |
2254 | left = *lenp; | |
00b7c339 AW |
2255 | |
2256 | if (write) { | |
f4aacea2 KC |
2257 | if (*ppos) { |
2258 | switch (sysctl_writes_strict) { | |
2259 | case SYSCTL_WRITES_STRICT: | |
2260 | goto out; | |
2261 | case SYSCTL_WRITES_WARN: | |
2262 | warn_sysctl_write(table); | |
2263 | break; | |
2264 | default: | |
2265 | break; | |
2266 | } | |
2267 | } | |
2268 | ||
00b7c339 AW |
2269 | if (left > PAGE_SIZE - 1) |
2270 | left = PAGE_SIZE - 1; | |
2271 | page = __get_free_page(GFP_TEMPORARY); | |
2272 | kbuf = (char *) page; | |
2273 | if (!kbuf) | |
2274 | return -ENOMEM; | |
2275 | if (copy_from_user(kbuf, buffer, left)) { | |
2276 | err = -EFAULT; | |
2277 | goto free; | |
2278 | } | |
2279 | kbuf[left] = 0; | |
2280 | } | |
2281 | ||
27b3d80a | 2282 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2283 | unsigned long val; |
2284 | ||
1da177e4 | 2285 | if (write) { |
00b7c339 AW |
2286 | bool neg; |
2287 | ||
2288 | left -= proc_skip_spaces(&kbuf); | |
2289 | ||
2290 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2291 | proc_wspace_sep, | |
2292 | sizeof(proc_wspace_sep), NULL); | |
2293 | if (err) | |
1da177e4 LT |
2294 | break; |
2295 | if (neg) | |
1da177e4 LT |
2296 | continue; |
2297 | if ((min && val < *min) || (max && val > *max)) | |
2298 | continue; | |
2299 | *i = val; | |
2300 | } else { | |
00b7c339 | 2301 | val = convdiv * (*i) / convmul; |
7833819d | 2302 | if (!first) { |
00b7c339 | 2303 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2304 | if (err) |
2305 | break; | |
2306 | } | |
00b7c339 AW |
2307 | err = proc_put_long(&buffer, &left, val, false); |
2308 | if (err) | |
2309 | break; | |
1da177e4 LT |
2310 | } |
2311 | } | |
2312 | ||
00b7c339 AW |
2313 | if (!write && !first && left && !err) |
2314 | err = proc_put_char(&buffer, &left, '\n'); | |
2315 | if (write && !err) | |
2316 | left -= proc_skip_spaces(&kbuf); | |
2317 | free: | |
1da177e4 | 2318 | if (write) { |
00b7c339 AW |
2319 | free_page(page); |
2320 | if (first) | |
2321 | return err ? : -EINVAL; | |
1da177e4 | 2322 | } |
1da177e4 | 2323 | *lenp -= left; |
f4aacea2 | 2324 | out: |
1da177e4 | 2325 | *ppos += *lenp; |
00b7c339 | 2326 | return err; |
1da177e4 LT |
2327 | } |
2328 | ||
d8217f07 | 2329 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2330 | void __user *buffer, |
2331 | size_t *lenp, loff_t *ppos, | |
2332 | unsigned long convmul, | |
2333 | unsigned long convdiv) | |
2334 | { | |
2335 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2336 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2337 | } |
2338 | ||
1da177e4 LT |
2339 | /** |
2340 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2341 | * @table: the sysctl table | |
2342 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2343 | * @buffer: the user buffer |
2344 | * @lenp: the size of the user buffer | |
2345 | * @ppos: file position | |
2346 | * | |
2347 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2348 | * values from/to the user buffer, treated as an ASCII string. | |
2349 | * | |
2350 | * This routine will ensure the values are within the range specified by | |
2351 | * table->extra1 (min) and table->extra2 (max). | |
2352 | * | |
2353 | * Returns 0 on success. | |
2354 | */ | |
8d65af78 | 2355 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2356 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2357 | { | |
8d65af78 | 2358 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2359 | } |
2360 | ||
2361 | /** | |
2362 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2363 | * @table: the sysctl table | |
2364 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2365 | * @buffer: the user buffer |
2366 | * @lenp: the size of the user buffer | |
2367 | * @ppos: file position | |
2368 | * | |
2369 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2370 | * values from/to the user buffer, treated as an ASCII string. The values | |
2371 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2372 | * | |
2373 | * This routine will ensure the values are within the range specified by | |
2374 | * table->extra1 (min) and table->extra2 (max). | |
2375 | * | |
2376 | * Returns 0 on success. | |
2377 | */ | |
d8217f07 | 2378 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2379 | void __user *buffer, |
2380 | size_t *lenp, loff_t *ppos) | |
2381 | { | |
8d65af78 | 2382 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2383 | lenp, ppos, HZ, 1000l); |
2384 | } | |
2385 | ||
2386 | ||
00b7c339 | 2387 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2388 | int *valp, |
2389 | int write, void *data) | |
2390 | { | |
2391 | if (write) { | |
cba9f33d BS |
2392 | if (*lvalp > LONG_MAX / HZ) |
2393 | return 1; | |
1da177e4 LT |
2394 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2395 | } else { | |
2396 | int val = *valp; | |
2397 | unsigned long lval; | |
2398 | if (val < 0) { | |
00b7c339 | 2399 | *negp = true; |
1da177e4 LT |
2400 | lval = (unsigned long)-val; |
2401 | } else { | |
00b7c339 | 2402 | *negp = false; |
1da177e4 LT |
2403 | lval = (unsigned long)val; |
2404 | } | |
2405 | *lvalp = lval / HZ; | |
2406 | } | |
2407 | return 0; | |
2408 | } | |
2409 | ||
00b7c339 | 2410 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2411 | int *valp, |
2412 | int write, void *data) | |
2413 | { | |
2414 | if (write) { | |
cba9f33d BS |
2415 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2416 | return 1; | |
1da177e4 LT |
2417 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2418 | } else { | |
2419 | int val = *valp; | |
2420 | unsigned long lval; | |
2421 | if (val < 0) { | |
00b7c339 | 2422 | *negp = true; |
1da177e4 LT |
2423 | lval = (unsigned long)-val; |
2424 | } else { | |
00b7c339 | 2425 | *negp = false; |
1da177e4 LT |
2426 | lval = (unsigned long)val; |
2427 | } | |
2428 | *lvalp = jiffies_to_clock_t(lval); | |
2429 | } | |
2430 | return 0; | |
2431 | } | |
2432 | ||
00b7c339 | 2433 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2434 | int *valp, |
2435 | int write, void *data) | |
2436 | { | |
2437 | if (write) { | |
d738ce8f FF |
2438 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2439 | ||
2440 | if (jif > INT_MAX) | |
2441 | return 1; | |
2442 | *valp = (int)jif; | |
1da177e4 LT |
2443 | } else { |
2444 | int val = *valp; | |
2445 | unsigned long lval; | |
2446 | if (val < 0) { | |
00b7c339 | 2447 | *negp = true; |
1da177e4 LT |
2448 | lval = (unsigned long)-val; |
2449 | } else { | |
00b7c339 | 2450 | *negp = false; |
1da177e4 LT |
2451 | lval = (unsigned long)val; |
2452 | } | |
2453 | *lvalp = jiffies_to_msecs(lval); | |
2454 | } | |
2455 | return 0; | |
2456 | } | |
2457 | ||
2458 | /** | |
2459 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2460 | * @table: the sysctl table | |
2461 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2462 | * @buffer: the user buffer |
2463 | * @lenp: the size of the user buffer | |
2464 | * @ppos: file position | |
2465 | * | |
2466 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2467 | * values from/to the user buffer, treated as an ASCII string. | |
2468 | * The values read are assumed to be in seconds, and are converted into | |
2469 | * jiffies. | |
2470 | * | |
2471 | * Returns 0 on success. | |
2472 | */ | |
8d65af78 | 2473 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2474 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2475 | { | |
8d65af78 | 2476 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2477 | do_proc_dointvec_jiffies_conv,NULL); |
2478 | } | |
2479 | ||
2480 | /** | |
2481 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2482 | * @table: the sysctl table | |
2483 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2484 | * @buffer: the user buffer |
2485 | * @lenp: the size of the user buffer | |
1e5d5331 | 2486 | * @ppos: pointer to the file position |
1da177e4 LT |
2487 | * |
2488 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2489 | * values from/to the user buffer, treated as an ASCII string. | |
2490 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2491 | * are converted into jiffies. | |
2492 | * | |
2493 | * Returns 0 on success. | |
2494 | */ | |
8d65af78 | 2495 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2496 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2497 | { | |
8d65af78 | 2498 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2499 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2500 | } | |
2501 | ||
2502 | /** | |
2503 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2504 | * @table: the sysctl table | |
2505 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2506 | * @buffer: the user buffer |
2507 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2508 | * @ppos: file position |
2509 | * @ppos: the current position in the file | |
1da177e4 LT |
2510 | * |
2511 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2512 | * values from/to the user buffer, treated as an ASCII string. | |
2513 | * The values read are assumed to be in 1/1000 seconds, and | |
2514 | * are converted into jiffies. | |
2515 | * | |
2516 | * Returns 0 on success. | |
2517 | */ | |
8d65af78 | 2518 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2519 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2520 | { | |
8d65af78 | 2521 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2522 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2523 | } | |
2524 | ||
8d65af78 | 2525 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2526 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2527 | { | |
2528 | struct pid *new_pid; | |
2529 | pid_t tmp; | |
2530 | int r; | |
2531 | ||
6c5f3e7b | 2532 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2533 | |
8d65af78 | 2534 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2535 | lenp, ppos, NULL, NULL); |
2536 | if (r || !write) | |
2537 | return r; | |
2538 | ||
2539 | new_pid = find_get_pid(tmp); | |
2540 | if (!new_pid) | |
2541 | return -ESRCH; | |
2542 | ||
2543 | put_pid(xchg(&cad_pid, new_pid)); | |
2544 | return 0; | |
2545 | } | |
2546 | ||
9f977fb7 OP |
2547 | /** |
2548 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2549 | * @table: the sysctl table | |
2550 | * @write: %TRUE if this is a write to the sysctl file | |
2551 | * @buffer: the user buffer | |
2552 | * @lenp: the size of the user buffer | |
2553 | * @ppos: file position | |
2554 | * | |
2555 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2556 | * in table->maxlen. | |
2557 | * | |
2558 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2559 | * large bitmaps may be represented in a compact manner. Writing into | |
2560 | * the file will clear the bitmap then update it with the given input. | |
2561 | * | |
2562 | * Returns 0 on success. | |
2563 | */ | |
2564 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2565 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2566 | { | |
2567 | int err = 0; | |
2568 | bool first = 1; | |
2569 | size_t left = *lenp; | |
2570 | unsigned long bitmap_len = table->maxlen; | |
2571 | unsigned long *bitmap = (unsigned long *) table->data; | |
2572 | unsigned long *tmp_bitmap = NULL; | |
2573 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2574 | ||
2575 | if (!bitmap_len || !left || (*ppos && !write)) { | |
2576 | *lenp = 0; | |
2577 | return 0; | |
2578 | } | |
2579 | ||
2580 | if (write) { | |
2581 | unsigned long page = 0; | |
2582 | char *kbuf; | |
2583 | ||
2584 | if (left > PAGE_SIZE - 1) | |
2585 | left = PAGE_SIZE - 1; | |
2586 | ||
2587 | page = __get_free_page(GFP_TEMPORARY); | |
2588 | kbuf = (char *) page; | |
2589 | if (!kbuf) | |
2590 | return -ENOMEM; | |
2591 | if (copy_from_user(kbuf, buffer, left)) { | |
2592 | free_page(page); | |
2593 | return -EFAULT; | |
2594 | } | |
2595 | kbuf[left] = 0; | |
2596 | ||
2597 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2598 | GFP_KERNEL); | |
2599 | if (!tmp_bitmap) { | |
2600 | free_page(page); | |
2601 | return -ENOMEM; | |
2602 | } | |
2603 | proc_skip_char(&kbuf, &left, '\n'); | |
2604 | while (!err && left) { | |
2605 | unsigned long val_a, val_b; | |
2606 | bool neg; | |
2607 | ||
2608 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2609 | sizeof(tr_a), &c); | |
2610 | if (err) | |
2611 | break; | |
2612 | if (val_a >= bitmap_len || neg) { | |
2613 | err = -EINVAL; | |
2614 | break; | |
2615 | } | |
2616 | ||
2617 | val_b = val_a; | |
2618 | if (left) { | |
2619 | kbuf++; | |
2620 | left--; | |
2621 | } | |
2622 | ||
2623 | if (c == '-') { | |
2624 | err = proc_get_long(&kbuf, &left, &val_b, | |
2625 | &neg, tr_b, sizeof(tr_b), | |
2626 | &c); | |
2627 | if (err) | |
2628 | break; | |
2629 | if (val_b >= bitmap_len || neg || | |
2630 | val_a > val_b) { | |
2631 | err = -EINVAL; | |
2632 | break; | |
2633 | } | |
2634 | if (left) { | |
2635 | kbuf++; | |
2636 | left--; | |
2637 | } | |
2638 | } | |
2639 | ||
5a04cca6 | 2640 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 OP |
2641 | first = 0; |
2642 | proc_skip_char(&kbuf, &left, '\n'); | |
2643 | } | |
2644 | free_page(page); | |
2645 | } else { | |
2646 | unsigned long bit_a, bit_b = 0; | |
2647 | ||
2648 | while (left) { | |
2649 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2650 | if (bit_a >= bitmap_len) | |
2651 | break; | |
2652 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2653 | bit_a + 1) - 1; | |
2654 | ||
2655 | if (!first) { | |
2656 | err = proc_put_char(&buffer, &left, ','); | |
2657 | if (err) | |
2658 | break; | |
2659 | } | |
2660 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2661 | if (err) | |
2662 | break; | |
2663 | if (bit_a != bit_b) { | |
2664 | err = proc_put_char(&buffer, &left, '-'); | |
2665 | if (err) | |
2666 | break; | |
2667 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2668 | if (err) | |
2669 | break; | |
2670 | } | |
2671 | ||
2672 | first = 0; bit_b++; | |
2673 | } | |
2674 | if (!err) | |
2675 | err = proc_put_char(&buffer, &left, '\n'); | |
2676 | } | |
2677 | ||
2678 | if (!err) { | |
2679 | if (write) { | |
2680 | if (*ppos) | |
2681 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2682 | else | |
5a04cca6 | 2683 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2684 | } |
2685 | kfree(tmp_bitmap); | |
2686 | *lenp -= left; | |
2687 | *ppos += *lenp; | |
2688 | return 0; | |
2689 | } else { | |
2690 | kfree(tmp_bitmap); | |
2691 | return err; | |
2692 | } | |
2693 | } | |
2694 | ||
55610500 | 2695 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2696 | |
8d65af78 | 2697 | int proc_dostring(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(struct ctl_table *table, int write, |
1da177e4 | 2704 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2705 | { |
2706 | return -ENOSYS; | |
2707 | } | |
2708 | ||
8d65af78 | 2709 | int proc_dointvec_minmax(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_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_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2722 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2723 | { | |
2724 | return -ENOSYS; | |
2725 | } | |
2726 | ||
8d65af78 | 2727 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2728 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2729 | { | |
2730 | return -ENOSYS; | |
2731 | } | |
2732 | ||
8d65af78 | 2733 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2734 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2735 | { | |
2736 | return -ENOSYS; | |
2737 | } | |
2738 | ||
d8217f07 | 2739 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2740 | void __user *buffer, |
2741 | size_t *lenp, loff_t *ppos) | |
2742 | { | |
2743 | return -ENOSYS; | |
2744 | } | |
2745 | ||
2746 | ||
55610500 | 2747 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2748 | |
1da177e4 LT |
2749 | /* |
2750 | * No sense putting this after each symbol definition, twice, | |
2751 | * exception granted :-) | |
2752 | */ | |
2753 | EXPORT_SYMBOL(proc_dointvec); | |
2754 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2755 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2756 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2757 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2758 | EXPORT_SYMBOL(proc_dostring); | |
2759 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2760 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |