Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
5a04cca6 | 26 | #include <linux/bitmap.h> |
d33ed52d | 27 | #include <linux/signal.h> |
455cd5ab | 28 | #include <linux/printk.h> |
1da177e4 | 29 | #include <linux/proc_fs.h> |
72c2d582 | 30 | #include <linux/security.h> |
1da177e4 | 31 | #include <linux/ctype.h> |
dfec072e | 32 | #include <linux/kmemcheck.h> |
fd4b616b | 33 | #include <linux/kmemleak.h> |
62239ac2 | 34 | #include <linux/fs.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | #include <linux/kernel.h> | |
0296b228 | 37 | #include <linux/kobject.h> |
20380731 | 38 | #include <linux/net.h> |
1da177e4 LT |
39 | #include <linux/sysrq.h> |
40 | #include <linux/highuid.h> | |
41 | #include <linux/writeback.h> | |
3fff4c42 | 42 | #include <linux/ratelimit.h> |
76ab0f53 | 43 | #include <linux/compaction.h> |
1da177e4 | 44 | #include <linux/hugetlb.h> |
1da177e4 | 45 | #include <linux/initrd.h> |
0b77f5bf | 46 | #include <linux/key.h> |
1da177e4 LT |
47 | #include <linux/times.h> |
48 | #include <linux/limits.h> | |
49 | #include <linux/dcache.h> | |
6e006701 | 50 | #include <linux/dnotify.h> |
1da177e4 | 51 | #include <linux/syscalls.h> |
c748e134 | 52 | #include <linux/vmstat.h> |
c255d844 PM |
53 | #include <linux/nfs_fs.h> |
54 | #include <linux/acpi.h> | |
10a0a8d4 | 55 | #include <linux/reboot.h> |
b0fc494f | 56 | #include <linux/ftrace.h> |
cdd6c482 | 57 | #include <linux/perf_event.h> |
b2be84df | 58 | #include <linux/kprobes.h> |
b492e95b | 59 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 60 | #include <linux/oom.h> |
17f60a7d | 61 | #include <linux/kmod.h> |
73efc039 | 62 | #include <linux/capability.h> |
40401530 | 63 | #include <linux/binfmts.h> |
cf4aebc2 | 64 | #include <linux/sched/sysctl.h> |
7984754b | 65 | #include <linux/kexec.h> |
1da177e4 LT |
66 | |
67 | #include <asm/uaccess.h> | |
68 | #include <asm/processor.h> | |
69 | ||
29cbc78b AK |
70 | #ifdef CONFIG_X86 |
71 | #include <asm/nmi.h> | |
0741f4d2 | 72 | #include <asm/stacktrace.h> |
6e7c4025 | 73 | #include <asm/io.h> |
29cbc78b | 74 | #endif |
d550bbd4 DH |
75 | #ifdef CONFIG_SPARC |
76 | #include <asm/setup.h> | |
77 | #endif | |
c55b7c3e DY |
78 | #ifdef CONFIG_BSD_PROCESS_ACCT |
79 | #include <linux/acct.h> | |
80 | #endif | |
4f0e056f DY |
81 | #ifdef CONFIG_RT_MUTEXES |
82 | #include <linux/rtmutex.h> | |
83 | #endif | |
2edf5e49 DY |
84 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
85 | #include <linux/lockdep.h> | |
86 | #endif | |
15485a46 DY |
87 | #ifdef CONFIG_CHR_DEV_SG |
88 | #include <scsi/sg.h> | |
89 | #endif | |
29cbc78b | 90 | |
58687acb | 91 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
92 | #include <linux/nmi.h> |
93 | #endif | |
94 | ||
7058cb02 | 95 | |
1da177e4 LT |
96 | #if defined(CONFIG_SYSCTL) |
97 | ||
98 | /* External variables not in a header file. */ | |
1da177e4 | 99 | extern int max_threads; |
d6e71144 | 100 | extern int suid_dumpable; |
046d662f AK |
101 | #ifdef CONFIG_COREDUMP |
102 | extern int core_uses_pid; | |
1da177e4 | 103 | extern char core_pattern[]; |
a293980c | 104 | extern unsigned int core_pipe_limit; |
046d662f | 105 | #endif |
1da177e4 | 106 | extern int pid_max; |
1da177e4 | 107 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 108 | extern int percpu_pagelist_fraction; |
bebfa101 | 109 | extern int compat_log; |
9745512c | 110 | extern int latencytop_enabled; |
eceea0b3 | 111 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
112 | #ifndef CONFIG_MMU |
113 | extern int sysctl_nr_trim_pages; | |
114 | #endif | |
1da177e4 | 115 | |
c4f3b63f | 116 | /* Constants used for minimum and maximum */ |
2508ce18 | 117 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
118 | static int sixty = 60; |
119 | #endif | |
120 | ||
270750db AT |
121 | static int __maybe_unused neg_one = -1; |
122 | ||
c4f3b63f | 123 | static int zero; |
cd5f9a4c LT |
124 | static int __maybe_unused one = 1; |
125 | static int __maybe_unused two = 2; | |
5509a5d2 | 126 | static int __maybe_unused four = 4; |
fc3501d4 | 127 | static unsigned long one_ul = 1; |
c4f3b63f | 128 | static int one_hundred = 100; |
af91322e DY |
129 | #ifdef CONFIG_PRINTK |
130 | static int ten_thousand = 10000; | |
131 | #endif | |
c4f3b63f | 132 | |
9e4a5bda AR |
133 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
134 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
135 | ||
1da177e4 LT |
136 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
137 | static int maxolduid = 65535; | |
138 | static int minolduid; | |
139 | ||
140 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 141 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 142 | |
80df2847 LH |
143 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
144 | #ifdef CONFIG_DETECT_HUNG_TASK | |
145 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
146 | #endif | |
147 | ||
d14f1729 DY |
148 | #ifdef CONFIG_INOTIFY_USER |
149 | #include <linux/inotify.h> | |
150 | #endif | |
72c57ed5 | 151 | #ifdef CONFIG_SPARC |
1da177e4 LT |
152 | #endif |
153 | ||
154 | #ifdef __hppa__ | |
155 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
156 | #endif |
157 | ||
158 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
159 | extern int unaligned_enabled; |
160 | #endif | |
1da177e4 | 161 | |
d2b176ed | 162 | #ifdef CONFIG_IA64 |
88fc241f | 163 | extern int unaligned_dump_stack; |
d2b176ed JS |
164 | #endif |
165 | ||
b6fca725 VG |
166 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
167 | extern int no_unaligned_warning; | |
168 | #endif | |
169 | ||
d6f8ff73 | 170 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 KC |
171 | |
172 | #define SYSCTL_WRITES_LEGACY -1 | |
173 | #define SYSCTL_WRITES_WARN 0 | |
174 | #define SYSCTL_WRITES_STRICT 1 | |
175 | ||
176 | static int sysctl_writes_strict = SYSCTL_WRITES_WARN; | |
177 | ||
8d65af78 | 178 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 179 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 180 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 181 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 182 | #endif |
9ec52099 | 183 | |
bfdc0b49 | 184 | #ifdef CONFIG_PRINTK |
620f6e8e | 185 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
186 | void __user *buffer, size_t *lenp, loff_t *ppos); |
187 | #endif | |
188 | ||
54b50199 KC |
189 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
190 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 191 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
192 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
193 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 194 | #endif |
54b50199 | 195 | |
97f5f0cd | 196 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 197 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 198 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 199 | |
6f8fd1d7 | 200 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
201 | void __user *buffer, size_t *lenp, |
202 | loff_t *ppos) | |
203 | { | |
204 | int error; | |
205 | ||
206 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
207 | if (error) | |
208 | return error; | |
209 | ||
210 | if (write) | |
211 | sysrq_toggle_support(__sysrq_enabled); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | #endif | |
217 | ||
d8217f07 EB |
218 | static struct ctl_table kern_table[]; |
219 | static struct ctl_table vm_table[]; | |
220 | static struct ctl_table fs_table[]; | |
221 | static struct ctl_table debug_table[]; | |
222 | static struct ctl_table dev_table[]; | |
223 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
224 | #ifdef CONFIG_EPOLL |
225 | extern struct ctl_table epoll_table[]; | |
226 | #endif | |
1da177e4 LT |
227 | |
228 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
229 | int sysctl_legacy_va_layout; | |
230 | #endif | |
231 | ||
1da177e4 LT |
232 | /* The default sysctl tables: */ |
233 | ||
de4e83bd | 234 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 235 | { |
1da177e4 LT |
236 | .procname = "kernel", |
237 | .mode = 0555, | |
238 | .child = kern_table, | |
239 | }, | |
240 | { | |
1da177e4 LT |
241 | .procname = "vm", |
242 | .mode = 0555, | |
243 | .child = vm_table, | |
244 | }, | |
1da177e4 | 245 | { |
1da177e4 LT |
246 | .procname = "fs", |
247 | .mode = 0555, | |
248 | .child = fs_table, | |
249 | }, | |
250 | { | |
1da177e4 LT |
251 | .procname = "debug", |
252 | .mode = 0555, | |
253 | .child = debug_table, | |
254 | }, | |
255 | { | |
1da177e4 LT |
256 | .procname = "dev", |
257 | .mode = 0555, | |
258 | .child = dev_table, | |
259 | }, | |
6fce56ec | 260 | { } |
1da177e4 LT |
261 | }; |
262 | ||
77e54a1f | 263 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
264 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
265 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
266 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
267 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 268 | #ifdef CONFIG_SMP |
1983a922 CE |
269 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
270 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
271 | #endif /* CONFIG_SMP */ |
272 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 273 | |
5e771905 MG |
274 | #ifdef CONFIG_COMPACTION |
275 | static int min_extfrag_threshold; | |
276 | static int max_extfrag_threshold = 1000; | |
277 | #endif | |
278 | ||
d8217f07 | 279 | static struct ctl_table kern_table[] = { |
2bba22c5 | 280 | { |
2bba22c5 MG |
281 | .procname = "sched_child_runs_first", |
282 | .data = &sysctl_sched_child_runs_first, | |
283 | .maxlen = sizeof(unsigned int), | |
284 | .mode = 0644, | |
6d456111 | 285 | .proc_handler = proc_dointvec, |
2bba22c5 | 286 | }, |
77e54a1f IM |
287 | #ifdef CONFIG_SCHED_DEBUG |
288 | { | |
b2be5e96 PZ |
289 | .procname = "sched_min_granularity_ns", |
290 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
291 | .maxlen = sizeof(unsigned int), |
292 | .mode = 0644, | |
702a7c76 | 293 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
294 | .extra1 = &min_sched_granularity_ns, |
295 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 296 | }, |
21805085 | 297 | { |
21805085 PZ |
298 | .procname = "sched_latency_ns", |
299 | .data = &sysctl_sched_latency, | |
300 | .maxlen = sizeof(unsigned int), | |
301 | .mode = 0644, | |
702a7c76 | 302 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
303 | .extra1 = &min_sched_granularity_ns, |
304 | .extra2 = &max_sched_granularity_ns, | |
305 | }, | |
77e54a1f | 306 | { |
77e54a1f IM |
307 | .procname = "sched_wakeup_granularity_ns", |
308 | .data = &sysctl_sched_wakeup_granularity, | |
309 | .maxlen = sizeof(unsigned int), | |
310 | .mode = 0644, | |
702a7c76 | 311 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
312 | .extra1 = &min_wakeup_granularity_ns, |
313 | .extra2 = &max_wakeup_granularity_ns, | |
314 | }, | |
cbee9f88 | 315 | #ifdef CONFIG_SMP |
1983a922 | 316 | { |
1983a922 CE |
317 | .procname = "sched_tunable_scaling", |
318 | .data = &sysctl_sched_tunable_scaling, | |
319 | .maxlen = sizeof(enum sched_tunable_scaling), | |
320 | .mode = 0644, | |
702a7c76 | 321 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
322 | .extra1 = &min_sched_tunable_scaling, |
323 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 324 | }, |
da84d961 | 325 | { |
d00535db | 326 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
327 | .data = &sysctl_sched_migration_cost, |
328 | .maxlen = sizeof(unsigned int), | |
329 | .mode = 0644, | |
6d456111 | 330 | .proc_handler = proc_dointvec, |
da84d961 | 331 | }, |
b82d9fdd | 332 | { |
b82d9fdd PZ |
333 | .procname = "sched_nr_migrate", |
334 | .data = &sysctl_sched_nr_migrate, | |
335 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 336 | .mode = 0644, |
6d456111 | 337 | .proc_handler = proc_dointvec, |
fa85ae24 | 338 | }, |
e9e9250b | 339 | { |
d00535db | 340 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
341 | .data = &sysctl_sched_time_avg, |
342 | .maxlen = sizeof(unsigned int), | |
343 | .mode = 0644, | |
6d456111 | 344 | .proc_handler = proc_dointvec, |
e9e9250b | 345 | }, |
a7a4f8a7 | 346 | { |
d00535db | 347 | .procname = "sched_shares_window_ns", |
a7a4f8a7 PT |
348 | .data = &sysctl_sched_shares_window, |
349 | .maxlen = sizeof(unsigned int), | |
350 | .mode = 0644, | |
351 | .proc_handler = proc_dointvec, | |
352 | }, | |
cd1bb94b | 353 | { |
cd1bb94b AB |
354 | .procname = "timer_migration", |
355 | .data = &sysctl_timer_migration, | |
356 | .maxlen = sizeof(unsigned int), | |
357 | .mode = 0644, | |
6d456111 | 358 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
359 | .extra1 = &zero, |
360 | .extra2 = &one, | |
fa85ae24 | 361 | }, |
cbee9f88 PZ |
362 | #endif /* CONFIG_SMP */ |
363 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
364 | { |
365 | .procname = "numa_balancing_scan_delay_ms", | |
366 | .data = &sysctl_numa_balancing_scan_delay, | |
367 | .maxlen = sizeof(unsigned int), | |
368 | .mode = 0644, | |
369 | .proc_handler = proc_dointvec, | |
370 | }, | |
cbee9f88 PZ |
371 | { |
372 | .procname = "numa_balancing_scan_period_min_ms", | |
373 | .data = &sysctl_numa_balancing_scan_period_min, | |
374 | .maxlen = sizeof(unsigned int), | |
375 | .mode = 0644, | |
376 | .proc_handler = proc_dointvec, | |
377 | }, | |
378 | { | |
379 | .procname = "numa_balancing_scan_period_max_ms", | |
380 | .data = &sysctl_numa_balancing_scan_period_max, | |
381 | .maxlen = sizeof(unsigned int), | |
382 | .mode = 0644, | |
383 | .proc_handler = proc_dointvec, | |
384 | }, | |
6e5fb223 PZ |
385 | { |
386 | .procname = "numa_balancing_scan_size_mb", | |
387 | .data = &sysctl_numa_balancing_scan_size, | |
388 | .maxlen = sizeof(unsigned int), | |
389 | .mode = 0644, | |
390 | .proc_handler = proc_dointvec, | |
391 | }, | |
54a43d54 AK |
392 | { |
393 | .procname = "numa_balancing", | |
394 | .data = NULL, /* filled in by handler */ | |
395 | .maxlen = sizeof(unsigned int), | |
396 | .mode = 0644, | |
397 | .proc_handler = sysctl_numa_balancing, | |
398 | .extra1 = &zero, | |
399 | .extra2 = &one, | |
400 | }, | |
cbee9f88 PZ |
401 | #endif /* CONFIG_NUMA_BALANCING */ |
402 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 403 | { |
9f0c1e56 PZ |
404 | .procname = "sched_rt_period_us", |
405 | .data = &sysctl_sched_rt_period, | |
406 | .maxlen = sizeof(unsigned int), | |
407 | .mode = 0644, | |
6d456111 | 408 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
409 | }, |
410 | { | |
9f0c1e56 PZ |
411 | .procname = "sched_rt_runtime_us", |
412 | .data = &sysctl_sched_rt_runtime, | |
413 | .maxlen = sizeof(int), | |
414 | .mode = 0644, | |
6d456111 | 415 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 416 | }, |
ce0dbbbb CW |
417 | { |
418 | .procname = "sched_rr_timeslice_ms", | |
419 | .data = &sched_rr_timeslice, | |
420 | .maxlen = sizeof(int), | |
421 | .mode = 0644, | |
422 | .proc_handler = sched_rr_handler, | |
423 | }, | |
5091faa4 MG |
424 | #ifdef CONFIG_SCHED_AUTOGROUP |
425 | { | |
426 | .procname = "sched_autogroup_enabled", | |
427 | .data = &sysctl_sched_autogroup_enabled, | |
428 | .maxlen = sizeof(unsigned int), | |
429 | .mode = 0644, | |
1747b21f | 430 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
431 | .extra1 = &zero, |
432 | .extra2 = &one, | |
433 | }, | |
434 | #endif | |
ec12cb7f PT |
435 | #ifdef CONFIG_CFS_BANDWIDTH |
436 | { | |
437 | .procname = "sched_cfs_bandwidth_slice_us", | |
438 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
439 | .maxlen = sizeof(unsigned int), | |
440 | .mode = 0644, | |
441 | .proc_handler = proc_dointvec_minmax, | |
442 | .extra1 = &one, | |
443 | }, | |
444 | #endif | |
f20786ff PZ |
445 | #ifdef CONFIG_PROVE_LOCKING |
446 | { | |
f20786ff PZ |
447 | .procname = "prove_locking", |
448 | .data = &prove_locking, | |
449 | .maxlen = sizeof(int), | |
450 | .mode = 0644, | |
6d456111 | 451 | .proc_handler = proc_dointvec, |
f20786ff PZ |
452 | }, |
453 | #endif | |
454 | #ifdef CONFIG_LOCK_STAT | |
455 | { | |
f20786ff PZ |
456 | .procname = "lock_stat", |
457 | .data = &lock_stat, | |
458 | .maxlen = sizeof(int), | |
459 | .mode = 0644, | |
6d456111 | 460 | .proc_handler = proc_dointvec, |
f20786ff | 461 | }, |
77e54a1f | 462 | #endif |
1da177e4 | 463 | { |
1da177e4 LT |
464 | .procname = "panic", |
465 | .data = &panic_timeout, | |
466 | .maxlen = sizeof(int), | |
467 | .mode = 0644, | |
6d456111 | 468 | .proc_handler = proc_dointvec, |
1da177e4 | 469 | }, |
046d662f | 470 | #ifdef CONFIG_COREDUMP |
1da177e4 | 471 | { |
1da177e4 LT |
472 | .procname = "core_uses_pid", |
473 | .data = &core_uses_pid, | |
474 | .maxlen = sizeof(int), | |
475 | .mode = 0644, | |
6d456111 | 476 | .proc_handler = proc_dointvec, |
1da177e4 LT |
477 | }, |
478 | { | |
1da177e4 LT |
479 | .procname = "core_pattern", |
480 | .data = core_pattern, | |
71ce92f3 | 481 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 482 | .mode = 0644, |
54b50199 | 483 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 484 | }, |
a293980c | 485 | { |
a293980c NH |
486 | .procname = "core_pipe_limit", |
487 | .data = &core_pipe_limit, | |
488 | .maxlen = sizeof(unsigned int), | |
489 | .mode = 0644, | |
6d456111 | 490 | .proc_handler = proc_dointvec, |
a293980c | 491 | }, |
046d662f | 492 | #endif |
34f5a398 | 493 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 494 | { |
1da177e4 | 495 | .procname = "tainted", |
25ddbb18 | 496 | .maxlen = sizeof(long), |
34f5a398 | 497 | .mode = 0644, |
6d456111 | 498 | .proc_handler = proc_taint, |
1da177e4 | 499 | }, |
f4aacea2 KC |
500 | { |
501 | .procname = "sysctl_writes_strict", | |
502 | .data = &sysctl_writes_strict, | |
503 | .maxlen = sizeof(int), | |
504 | .mode = 0644, | |
505 | .proc_handler = proc_dointvec_minmax, | |
506 | .extra1 = &neg_one, | |
507 | .extra2 = &one, | |
508 | }, | |
34f5a398 | 509 | #endif |
9745512c AV |
510 | #ifdef CONFIG_LATENCYTOP |
511 | { | |
512 | .procname = "latencytop", | |
513 | .data = &latencytop_enabled, | |
514 | .maxlen = sizeof(int), | |
515 | .mode = 0644, | |
6d456111 | 516 | .proc_handler = proc_dointvec, |
9745512c AV |
517 | }, |
518 | #endif | |
1da177e4 LT |
519 | #ifdef CONFIG_BLK_DEV_INITRD |
520 | { | |
1da177e4 LT |
521 | .procname = "real-root-dev", |
522 | .data = &real_root_dev, | |
523 | .maxlen = sizeof(int), | |
524 | .mode = 0644, | |
6d456111 | 525 | .proc_handler = proc_dointvec, |
1da177e4 LT |
526 | }, |
527 | #endif | |
45807a1d | 528 | { |
45807a1d IM |
529 | .procname = "print-fatal-signals", |
530 | .data = &print_fatal_signals, | |
531 | .maxlen = sizeof(int), | |
532 | .mode = 0644, | |
6d456111 | 533 | .proc_handler = proc_dointvec, |
45807a1d | 534 | }, |
72c57ed5 | 535 | #ifdef CONFIG_SPARC |
1da177e4 | 536 | { |
1da177e4 LT |
537 | .procname = "reboot-cmd", |
538 | .data = reboot_command, | |
539 | .maxlen = 256, | |
540 | .mode = 0644, | |
6d456111 | 541 | .proc_handler = proc_dostring, |
1da177e4 LT |
542 | }, |
543 | { | |
1da177e4 LT |
544 | .procname = "stop-a", |
545 | .data = &stop_a_enabled, | |
546 | .maxlen = sizeof (int), | |
547 | .mode = 0644, | |
6d456111 | 548 | .proc_handler = proc_dointvec, |
1da177e4 LT |
549 | }, |
550 | { | |
1da177e4 LT |
551 | .procname = "scons-poweroff", |
552 | .data = &scons_pwroff, | |
553 | .maxlen = sizeof (int), | |
554 | .mode = 0644, | |
6d456111 | 555 | .proc_handler = proc_dointvec, |
1da177e4 LT |
556 | }, |
557 | #endif | |
0871420f DM |
558 | #ifdef CONFIG_SPARC64 |
559 | { | |
0871420f DM |
560 | .procname = "tsb-ratio", |
561 | .data = &sysctl_tsb_ratio, | |
562 | .maxlen = sizeof (int), | |
563 | .mode = 0644, | |
6d456111 | 564 | .proc_handler = proc_dointvec, |
0871420f DM |
565 | }, |
566 | #endif | |
1da177e4 LT |
567 | #ifdef __hppa__ |
568 | { | |
1da177e4 LT |
569 | .procname = "soft-power", |
570 | .data = &pwrsw_enabled, | |
571 | .maxlen = sizeof (int), | |
572 | .mode = 0644, | |
6d456111 | 573 | .proc_handler = proc_dointvec, |
1da177e4 | 574 | }, |
bf14e3b9 VG |
575 | #endif |
576 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 577 | { |
1da177e4 LT |
578 | .procname = "unaligned-trap", |
579 | .data = &unaligned_enabled, | |
580 | .maxlen = sizeof (int), | |
581 | .mode = 0644, | |
6d456111 | 582 | .proc_handler = proc_dointvec, |
1da177e4 LT |
583 | }, |
584 | #endif | |
585 | { | |
1da177e4 LT |
586 | .procname = "ctrl-alt-del", |
587 | .data = &C_A_D, | |
588 | .maxlen = sizeof(int), | |
589 | .mode = 0644, | |
6d456111 | 590 | .proc_handler = proc_dointvec, |
1da177e4 | 591 | }, |
606576ce | 592 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 593 | { |
b0fc494f SR |
594 | .procname = "ftrace_enabled", |
595 | .data = &ftrace_enabled, | |
596 | .maxlen = sizeof(int), | |
597 | .mode = 0644, | |
6d456111 | 598 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
599 | }, |
600 | #endif | |
f38f1d2a SR |
601 | #ifdef CONFIG_STACK_TRACER |
602 | { | |
f38f1d2a SR |
603 | .procname = "stack_tracer_enabled", |
604 | .data = &stack_tracer_enabled, | |
605 | .maxlen = sizeof(int), | |
606 | .mode = 0644, | |
6d456111 | 607 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
608 | }, |
609 | #endif | |
944ac425 SR |
610 | #ifdef CONFIG_TRACING |
611 | { | |
3299b4dd | 612 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
613 | .data = &ftrace_dump_on_oops, |
614 | .maxlen = sizeof(int), | |
615 | .mode = 0644, | |
6d456111 | 616 | .proc_handler = proc_dointvec, |
944ac425 | 617 | }, |
de7edd31 SRRH |
618 | { |
619 | .procname = "traceoff_on_warning", | |
620 | .data = &__disable_trace_on_warning, | |
621 | .maxlen = sizeof(__disable_trace_on_warning), | |
622 | .mode = 0644, | |
623 | .proc_handler = proc_dointvec, | |
624 | }, | |
944ac425 | 625 | #endif |
7984754b KC |
626 | #ifdef CONFIG_KEXEC |
627 | { | |
628 | .procname = "kexec_load_disabled", | |
629 | .data = &kexec_load_disabled, | |
630 | .maxlen = sizeof(int), | |
631 | .mode = 0644, | |
632 | /* only handle a transition from default "0" to "1" */ | |
633 | .proc_handler = proc_dointvec_minmax, | |
634 | .extra1 = &one, | |
635 | .extra2 = &one, | |
636 | }, | |
637 | #endif | |
a1ef5adb | 638 | #ifdef CONFIG_MODULES |
1da177e4 | 639 | { |
1da177e4 LT |
640 | .procname = "modprobe", |
641 | .data = &modprobe_path, | |
642 | .maxlen = KMOD_PATH_LEN, | |
643 | .mode = 0644, | |
6d456111 | 644 | .proc_handler = proc_dostring, |
1da177e4 | 645 | }, |
3d43321b | 646 | { |
3d43321b KC |
647 | .procname = "modules_disabled", |
648 | .data = &modules_disabled, | |
649 | .maxlen = sizeof(int), | |
650 | .mode = 0644, | |
651 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 652 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
653 | .extra1 = &one, |
654 | .extra2 = &one, | |
655 | }, | |
1da177e4 | 656 | #endif |
86d56134 | 657 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 658 | { |
1da177e4 | 659 | .procname = "hotplug", |
312c004d KS |
660 | .data = &uevent_helper, |
661 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 662 | .mode = 0644, |
6d456111 | 663 | .proc_handler = proc_dostring, |
1da177e4 | 664 | }, |
86d56134 | 665 | #endif |
1da177e4 LT |
666 | #ifdef CONFIG_CHR_DEV_SG |
667 | { | |
1da177e4 LT |
668 | .procname = "sg-big-buff", |
669 | .data = &sg_big_buff, | |
670 | .maxlen = sizeof (int), | |
671 | .mode = 0444, | |
6d456111 | 672 | .proc_handler = proc_dointvec, |
1da177e4 LT |
673 | }, |
674 | #endif | |
675 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
676 | { | |
1da177e4 LT |
677 | .procname = "acct", |
678 | .data = &acct_parm, | |
679 | .maxlen = 3*sizeof(int), | |
680 | .mode = 0644, | |
6d456111 | 681 | .proc_handler = proc_dointvec, |
1da177e4 LT |
682 | }, |
683 | #endif | |
1da177e4 LT |
684 | #ifdef CONFIG_MAGIC_SYSRQ |
685 | { | |
1da177e4 | 686 | .procname = "sysrq", |
5d6f647f | 687 | .data = &__sysrq_enabled, |
1da177e4 LT |
688 | .maxlen = sizeof (int), |
689 | .mode = 0644, | |
97f5f0cd | 690 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
691 | }, |
692 | #endif | |
d6f8ff73 | 693 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 694 | { |
1da177e4 | 695 | .procname = "cad_pid", |
9ec52099 | 696 | .data = NULL, |
1da177e4 LT |
697 | .maxlen = sizeof (int), |
698 | .mode = 0600, | |
6d456111 | 699 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 700 | }, |
d6f8ff73 | 701 | #endif |
1da177e4 | 702 | { |
1da177e4 LT |
703 | .procname = "threads-max", |
704 | .data = &max_threads, | |
705 | .maxlen = sizeof(int), | |
706 | .mode = 0644, | |
6d456111 | 707 | .proc_handler = proc_dointvec, |
1da177e4 LT |
708 | }, |
709 | { | |
1da177e4 LT |
710 | .procname = "random", |
711 | .mode = 0555, | |
712 | .child = random_table, | |
713 | }, | |
17f60a7d EP |
714 | { |
715 | .procname = "usermodehelper", | |
716 | .mode = 0555, | |
717 | .child = usermodehelper_table, | |
718 | }, | |
1da177e4 | 719 | { |
1da177e4 LT |
720 | .procname = "overflowuid", |
721 | .data = &overflowuid, | |
722 | .maxlen = sizeof(int), | |
723 | .mode = 0644, | |
6d456111 | 724 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
725 | .extra1 = &minolduid, |
726 | .extra2 = &maxolduid, | |
727 | }, | |
728 | { | |
1da177e4 LT |
729 | .procname = "overflowgid", |
730 | .data = &overflowgid, | |
731 | .maxlen = sizeof(int), | |
732 | .mode = 0644, | |
6d456111 | 733 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
734 | .extra1 = &minolduid, |
735 | .extra2 = &maxolduid, | |
736 | }, | |
347a8dc3 | 737 | #ifdef CONFIG_S390 |
1da177e4 LT |
738 | #ifdef CONFIG_MATHEMU |
739 | { | |
1da177e4 LT |
740 | .procname = "ieee_emulation_warnings", |
741 | .data = &sysctl_ieee_emulation_warnings, | |
742 | .maxlen = sizeof(int), | |
743 | .mode = 0644, | |
6d456111 | 744 | .proc_handler = proc_dointvec, |
1da177e4 | 745 | }, |
1da177e4 LT |
746 | #endif |
747 | { | |
1da177e4 | 748 | .procname = "userprocess_debug", |
ab3c68ee | 749 | .data = &show_unhandled_signals, |
1da177e4 LT |
750 | .maxlen = sizeof(int), |
751 | .mode = 0644, | |
6d456111 | 752 | .proc_handler = proc_dointvec, |
1da177e4 LT |
753 | }, |
754 | #endif | |
755 | { | |
1da177e4 LT |
756 | .procname = "pid_max", |
757 | .data = &pid_max, | |
758 | .maxlen = sizeof (int), | |
759 | .mode = 0644, | |
6d456111 | 760 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
761 | .extra1 = &pid_max_min, |
762 | .extra2 = &pid_max_max, | |
763 | }, | |
764 | { | |
1da177e4 LT |
765 | .procname = "panic_on_oops", |
766 | .data = &panic_on_oops, | |
767 | .maxlen = sizeof(int), | |
768 | .mode = 0644, | |
6d456111 | 769 | .proc_handler = proc_dointvec, |
1da177e4 | 770 | }, |
7ef3d2fd JP |
771 | #if defined CONFIG_PRINTK |
772 | { | |
7ef3d2fd JP |
773 | .procname = "printk", |
774 | .data = &console_loglevel, | |
775 | .maxlen = 4*sizeof(int), | |
776 | .mode = 0644, | |
6d456111 | 777 | .proc_handler = proc_dointvec, |
7ef3d2fd | 778 | }, |
1da177e4 | 779 | { |
1da177e4 | 780 | .procname = "printk_ratelimit", |
717115e1 | 781 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
782 | .maxlen = sizeof(int), |
783 | .mode = 0644, | |
6d456111 | 784 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
785 | }, |
786 | { | |
1da177e4 | 787 | .procname = "printk_ratelimit_burst", |
717115e1 | 788 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
789 | .maxlen = sizeof(int), |
790 | .mode = 0644, | |
6d456111 | 791 | .proc_handler = proc_dointvec, |
1da177e4 | 792 | }, |
af91322e | 793 | { |
af91322e DY |
794 | .procname = "printk_delay", |
795 | .data = &printk_delay_msec, | |
796 | .maxlen = sizeof(int), | |
797 | .mode = 0644, | |
6d456111 | 798 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
799 | .extra1 = &zero, |
800 | .extra2 = &ten_thousand, | |
801 | }, | |
eaf06b24 DR |
802 | { |
803 | .procname = "dmesg_restrict", | |
804 | .data = &dmesg_restrict, | |
805 | .maxlen = sizeof(int), | |
806 | .mode = 0644, | |
620f6e8e | 807 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
808 | .extra1 = &zero, |
809 | .extra2 = &one, | |
810 | }, | |
455cd5ab DR |
811 | { |
812 | .procname = "kptr_restrict", | |
813 | .data = &kptr_restrict, | |
814 | .maxlen = sizeof(int), | |
815 | .mode = 0644, | |
620f6e8e | 816 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
817 | .extra1 = &zero, |
818 | .extra2 = &two, | |
819 | }, | |
df6e61d4 | 820 | #endif |
1da177e4 | 821 | { |
1da177e4 LT |
822 | .procname = "ngroups_max", |
823 | .data = &ngroups_max, | |
824 | .maxlen = sizeof (int), | |
825 | .mode = 0444, | |
6d456111 | 826 | .proc_handler = proc_dointvec, |
1da177e4 | 827 | }, |
73efc039 DB |
828 | { |
829 | .procname = "cap_last_cap", | |
830 | .data = (void *)&cap_last_cap, | |
831 | .maxlen = sizeof(int), | |
832 | .mode = 0444, | |
833 | .proc_handler = proc_dointvec, | |
834 | }, | |
58687acb | 835 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 836 | { |
58687acb | 837 | .procname = "watchdog", |
3c00ea82 | 838 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
839 | .maxlen = sizeof (int), |
840 | .mode = 0644, | |
586692a5 MSB |
841 | .proc_handler = proc_dowatchdog, |
842 | .extra1 = &zero, | |
843 | .extra2 = &one, | |
58687acb DZ |
844 | }, |
845 | { | |
846 | .procname = "watchdog_thresh", | |
586692a5 | 847 | .data = &watchdog_thresh, |
58687acb DZ |
848 | .maxlen = sizeof(int), |
849 | .mode = 0644, | |
586692a5 | 850 | .proc_handler = proc_dowatchdog, |
a6572f84 | 851 | .extra1 = &zero, |
58687acb | 852 | .extra2 = &sixty, |
504d7cf1 | 853 | }, |
2508ce18 DZ |
854 | { |
855 | .procname = "softlockup_panic", | |
856 | .data = &softlockup_panic, | |
857 | .maxlen = sizeof(int), | |
858 | .mode = 0644, | |
859 | .proc_handler = proc_dointvec_minmax, | |
860 | .extra1 = &zero, | |
861 | .extra2 = &one, | |
862 | }, | |
5dc30558 DZ |
863 | { |
864 | .procname = "nmi_watchdog", | |
3c00ea82 | 865 | .data = &watchdog_user_enabled, |
5dc30558 DZ |
866 | .maxlen = sizeof (int), |
867 | .mode = 0644, | |
586692a5 MSB |
868 | .proc_handler = proc_dowatchdog, |
869 | .extra1 = &zero, | |
870 | .extra2 = &one, | |
5dc30558 DZ |
871 | }, |
872 | #endif | |
873 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
874 | { | |
875 | .procname = "unknown_nmi_panic", | |
876 | .data = &unknown_nmi_panic, | |
877 | .maxlen = sizeof (int), | |
878 | .mode = 0644, | |
879 | .proc_handler = proc_dointvec, | |
880 | }, | |
504d7cf1 | 881 | #endif |
1da177e4 | 882 | #if defined(CONFIG_X86) |
8da5adda | 883 | { |
8da5adda DZ |
884 | .procname = "panic_on_unrecovered_nmi", |
885 | .data = &panic_on_unrecovered_nmi, | |
886 | .maxlen = sizeof(int), | |
887 | .mode = 0644, | |
6d456111 | 888 | .proc_handler = proc_dointvec, |
8da5adda | 889 | }, |
5211a242 | 890 | { |
5211a242 KG |
891 | .procname = "panic_on_io_nmi", |
892 | .data = &panic_on_io_nmi, | |
893 | .maxlen = sizeof(int), | |
894 | .mode = 0644, | |
6d456111 | 895 | .proc_handler = proc_dointvec, |
5211a242 | 896 | }, |
55af7796 MH |
897 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
898 | { | |
899 | .procname = "panic_on_stackoverflow", | |
900 | .data = &sysctl_panic_on_stackoverflow, | |
901 | .maxlen = sizeof(int), | |
902 | .mode = 0644, | |
903 | .proc_handler = proc_dointvec, | |
904 | }, | |
905 | #endif | |
1da177e4 | 906 | { |
1da177e4 LT |
907 | .procname = "bootloader_type", |
908 | .data = &bootloader_type, | |
909 | .maxlen = sizeof (int), | |
910 | .mode = 0444, | |
6d456111 | 911 | .proc_handler = proc_dointvec, |
1da177e4 | 912 | }, |
5031296c | 913 | { |
5031296c PA |
914 | .procname = "bootloader_version", |
915 | .data = &bootloader_version, | |
916 | .maxlen = sizeof (int), | |
917 | .mode = 0444, | |
6d456111 | 918 | .proc_handler = proc_dointvec, |
5031296c | 919 | }, |
0741f4d2 | 920 | { |
0741f4d2 CE |
921 | .procname = "kstack_depth_to_print", |
922 | .data = &kstack_depth_to_print, | |
923 | .maxlen = sizeof(int), | |
924 | .mode = 0644, | |
6d456111 | 925 | .proc_handler = proc_dointvec, |
0741f4d2 | 926 | }, |
6e7c4025 | 927 | { |
6e7c4025 IM |
928 | .procname = "io_delay_type", |
929 | .data = &io_delay_type, | |
930 | .maxlen = sizeof(int), | |
931 | .mode = 0644, | |
6d456111 | 932 | .proc_handler = proc_dointvec, |
6e7c4025 | 933 | }, |
1da177e4 | 934 | #endif |
7a9166e3 | 935 | #if defined(CONFIG_MMU) |
1da177e4 | 936 | { |
1da177e4 LT |
937 | .procname = "randomize_va_space", |
938 | .data = &randomize_va_space, | |
939 | .maxlen = sizeof(int), | |
940 | .mode = 0644, | |
6d456111 | 941 | .proc_handler = proc_dointvec, |
1da177e4 | 942 | }, |
7a9166e3 | 943 | #endif |
0152fb37 | 944 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 945 | { |
951f22d5 MS |
946 | .procname = "spin_retry", |
947 | .data = &spin_retry, | |
948 | .maxlen = sizeof (int), | |
949 | .mode = 0644, | |
6d456111 | 950 | .proc_handler = proc_dointvec, |
951f22d5 | 951 | }, |
c255d844 | 952 | #endif |
673d5b43 | 953 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 954 | { |
c255d844 | 955 | .procname = "acpi_video_flags", |
77afcf78 | 956 | .data = &acpi_realmode_flags, |
c255d844 PM |
957 | .maxlen = sizeof (unsigned long), |
958 | .mode = 0644, | |
6d456111 | 959 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 960 | }, |
d2b176ed | 961 | #endif |
b6fca725 | 962 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 963 | { |
d2b176ed JS |
964 | .procname = "ignore-unaligned-usertrap", |
965 | .data = &no_unaligned_warning, | |
966 | .maxlen = sizeof (int), | |
967 | .mode = 0644, | |
6d456111 | 968 | .proc_handler = proc_dointvec, |
d2b176ed | 969 | }, |
b6fca725 VG |
970 | #endif |
971 | #ifdef CONFIG_IA64 | |
88fc241f | 972 | { |
88fc241f DC |
973 | .procname = "unaligned-dump-stack", |
974 | .data = &unaligned_dump_stack, | |
975 | .maxlen = sizeof (int), | |
976 | .mode = 0644, | |
6d456111 | 977 | .proc_handler = proc_dointvec, |
88fc241f | 978 | }, |
bebfa101 | 979 | #endif |
e162b39a MSB |
980 | #ifdef CONFIG_DETECT_HUNG_TASK |
981 | { | |
e162b39a MSB |
982 | .procname = "hung_task_panic", |
983 | .data = &sysctl_hung_task_panic, | |
984 | .maxlen = sizeof(int), | |
985 | .mode = 0644, | |
6d456111 | 986 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
987 | .extra1 = &zero, |
988 | .extra2 = &one, | |
989 | }, | |
82a1fcb9 | 990 | { |
82a1fcb9 IM |
991 | .procname = "hung_task_check_count", |
992 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 993 | .maxlen = sizeof(int), |
82a1fcb9 | 994 | .mode = 0644, |
cd64647f LZ |
995 | .proc_handler = proc_dointvec_minmax, |
996 | .extra1 = &zero, | |
82a1fcb9 IM |
997 | }, |
998 | { | |
82a1fcb9 IM |
999 | .procname = "hung_task_timeout_secs", |
1000 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1001 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1002 | .mode = 0644, |
6d456111 | 1003 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1004 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1005 | }, |
1006 | { | |
82a1fcb9 IM |
1007 | .procname = "hung_task_warnings", |
1008 | .data = &sysctl_hung_task_warnings, | |
270750db | 1009 | .maxlen = sizeof(int), |
82a1fcb9 | 1010 | .mode = 0644, |
270750db AT |
1011 | .proc_handler = proc_dointvec_minmax, |
1012 | .extra1 = &neg_one, | |
82a1fcb9 | 1013 | }, |
c4f3b63f | 1014 | #endif |
bebfa101 AK |
1015 | #ifdef CONFIG_COMPAT |
1016 | { | |
bebfa101 AK |
1017 | .procname = "compat-log", |
1018 | .data = &compat_log, | |
1019 | .maxlen = sizeof (int), | |
1020 | .mode = 0644, | |
6d456111 | 1021 | .proc_handler = proc_dointvec, |
bebfa101 | 1022 | }, |
951f22d5 | 1023 | #endif |
23f78d4a IM |
1024 | #ifdef CONFIG_RT_MUTEXES |
1025 | { | |
23f78d4a IM |
1026 | .procname = "max_lock_depth", |
1027 | .data = &max_lock_depth, | |
1028 | .maxlen = sizeof(int), | |
1029 | .mode = 0644, | |
6d456111 | 1030 | .proc_handler = proc_dointvec, |
23f78d4a | 1031 | }, |
5096add8 | 1032 | #endif |
10a0a8d4 | 1033 | { |
10a0a8d4 JF |
1034 | .procname = "poweroff_cmd", |
1035 | .data = &poweroff_cmd, | |
1036 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1037 | .mode = 0644, | |
6d456111 | 1038 | .proc_handler = proc_dostring, |
10a0a8d4 | 1039 | }, |
0b77f5bf DH |
1040 | #ifdef CONFIG_KEYS |
1041 | { | |
0b77f5bf DH |
1042 | .procname = "keys", |
1043 | .mode = 0555, | |
1044 | .child = key_sysctls, | |
1045 | }, | |
1046 | #endif | |
31a72bce PM |
1047 | #ifdef CONFIG_RCU_TORTURE_TEST |
1048 | { | |
31a72bce PM |
1049 | .procname = "rcutorture_runnable", |
1050 | .data = &rcutorture_runnable, | |
1051 | .maxlen = sizeof(int), | |
1052 | .mode = 0644, | |
6d456111 | 1053 | .proc_handler = proc_dointvec, |
31a72bce PM |
1054 | }, |
1055 | #endif | |
cdd6c482 | 1056 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1057 | /* |
1058 | * User-space scripts rely on the existence of this file | |
1059 | * as a feature check for perf_events being enabled. | |
1060 | * | |
1061 | * So it's an ABI, do not remove! | |
1062 | */ | |
1ccd1549 | 1063 | { |
cdd6c482 IM |
1064 | .procname = "perf_event_paranoid", |
1065 | .data = &sysctl_perf_event_paranoid, | |
1066 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1067 | .mode = 0644, |
6d456111 | 1068 | .proc_handler = proc_dointvec, |
1ccd1549 | 1069 | }, |
c5078f78 | 1070 | { |
cdd6c482 IM |
1071 | .procname = "perf_event_mlock_kb", |
1072 | .data = &sysctl_perf_event_mlock, | |
1073 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1074 | .mode = 0644, |
6d456111 | 1075 | .proc_handler = proc_dointvec, |
c5078f78 | 1076 | }, |
a78ac325 | 1077 | { |
cdd6c482 IM |
1078 | .procname = "perf_event_max_sample_rate", |
1079 | .data = &sysctl_perf_event_sample_rate, | |
1080 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1081 | .mode = 0644, |
163ec435 | 1082 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1083 | .extra1 = &one, |
a78ac325 | 1084 | }, |
14c63f17 DH |
1085 | { |
1086 | .procname = "perf_cpu_time_max_percent", | |
1087 | .data = &sysctl_perf_cpu_time_max_percent, | |
1088 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1089 | .mode = 0644, | |
1090 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1091 | .extra1 = &zero, | |
1092 | .extra2 = &one_hundred, | |
1093 | }, | |
1ccd1549 | 1094 | #endif |
dfec072e VN |
1095 | #ifdef CONFIG_KMEMCHECK |
1096 | { | |
dfec072e VN |
1097 | .procname = "kmemcheck", |
1098 | .data = &kmemcheck_enabled, | |
1099 | .maxlen = sizeof(int), | |
1100 | .mode = 0644, | |
6d456111 | 1101 | .proc_handler = proc_dointvec, |
dfec072e | 1102 | }, |
cb684b5b | 1103 | #endif |
6fce56ec | 1104 | { } |
1da177e4 LT |
1105 | }; |
1106 | ||
d8217f07 | 1107 | static struct ctl_table vm_table[] = { |
1da177e4 | 1108 | { |
1da177e4 LT |
1109 | .procname = "overcommit_memory", |
1110 | .data = &sysctl_overcommit_memory, | |
1111 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1112 | .mode = 0644, | |
cb16e95f PH |
1113 | .proc_handler = proc_dointvec_minmax, |
1114 | .extra1 = &zero, | |
1115 | .extra2 = &two, | |
1da177e4 | 1116 | }, |
fadd8fbd | 1117 | { |
fadd8fbd KH |
1118 | .procname = "panic_on_oom", |
1119 | .data = &sysctl_panic_on_oom, | |
1120 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1121 | .mode = 0644, | |
cb16e95f PH |
1122 | .proc_handler = proc_dointvec_minmax, |
1123 | .extra1 = &zero, | |
1124 | .extra2 = &two, | |
fadd8fbd | 1125 | }, |
fe071d7e | 1126 | { |
fe071d7e DR |
1127 | .procname = "oom_kill_allocating_task", |
1128 | .data = &sysctl_oom_kill_allocating_task, | |
1129 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1130 | .mode = 0644, | |
6d456111 | 1131 | .proc_handler = proc_dointvec, |
fe071d7e | 1132 | }, |
fef1bdd6 | 1133 | { |
fef1bdd6 DR |
1134 | .procname = "oom_dump_tasks", |
1135 | .data = &sysctl_oom_dump_tasks, | |
1136 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1137 | .mode = 0644, | |
6d456111 | 1138 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1139 | }, |
1da177e4 | 1140 | { |
1da177e4 LT |
1141 | .procname = "overcommit_ratio", |
1142 | .data = &sysctl_overcommit_ratio, | |
1143 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1144 | .mode = 0644, | |
49f0ce5f JM |
1145 | .proc_handler = overcommit_ratio_handler, |
1146 | }, | |
1147 | { | |
1148 | .procname = "overcommit_kbytes", | |
1149 | .data = &sysctl_overcommit_kbytes, | |
1150 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1151 | .mode = 0644, | |
1152 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1153 | }, |
1154 | { | |
1da177e4 LT |
1155 | .procname = "page-cluster", |
1156 | .data = &page_cluster, | |
1157 | .maxlen = sizeof(int), | |
1158 | .mode = 0644, | |
cb16e95f PH |
1159 | .proc_handler = proc_dointvec_minmax, |
1160 | .extra1 = &zero, | |
1da177e4 LT |
1161 | }, |
1162 | { | |
1da177e4 LT |
1163 | .procname = "dirty_background_ratio", |
1164 | .data = &dirty_background_ratio, | |
1165 | .maxlen = sizeof(dirty_background_ratio), | |
1166 | .mode = 0644, | |
6d456111 | 1167 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1168 | .extra1 = &zero, |
1169 | .extra2 = &one_hundred, | |
1170 | }, | |
2da02997 | 1171 | { |
2da02997 DR |
1172 | .procname = "dirty_background_bytes", |
1173 | .data = &dirty_background_bytes, | |
1174 | .maxlen = sizeof(dirty_background_bytes), | |
1175 | .mode = 0644, | |
6d456111 | 1176 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1177 | .extra1 = &one_ul, |
2da02997 | 1178 | }, |
1da177e4 | 1179 | { |
1da177e4 LT |
1180 | .procname = "dirty_ratio", |
1181 | .data = &vm_dirty_ratio, | |
1182 | .maxlen = sizeof(vm_dirty_ratio), | |
1183 | .mode = 0644, | |
6d456111 | 1184 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1185 | .extra1 = &zero, |
1186 | .extra2 = &one_hundred, | |
1187 | }, | |
2da02997 | 1188 | { |
2da02997 DR |
1189 | .procname = "dirty_bytes", |
1190 | .data = &vm_dirty_bytes, | |
1191 | .maxlen = sizeof(vm_dirty_bytes), | |
1192 | .mode = 0644, | |
6d456111 | 1193 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1194 | .extra1 = &dirty_bytes_min, |
2da02997 | 1195 | }, |
1da177e4 | 1196 | { |
1da177e4 | 1197 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1198 | .data = &dirty_writeback_interval, |
1199 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1200 | .mode = 0644, |
6d456111 | 1201 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1202 | }, |
1203 | { | |
1da177e4 | 1204 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1205 | .data = &dirty_expire_interval, |
1206 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1207 | .mode = 0644, |
cb16e95f PH |
1208 | .proc_handler = proc_dointvec_minmax, |
1209 | .extra1 = &zero, | |
1da177e4 LT |
1210 | }, |
1211 | { | |
3965c9ae WL |
1212 | .procname = "nr_pdflush_threads", |
1213 | .mode = 0444 /* read-only */, | |
1214 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1215 | }, |
1216 | { | |
1da177e4 LT |
1217 | .procname = "swappiness", |
1218 | .data = &vm_swappiness, | |
1219 | .maxlen = sizeof(vm_swappiness), | |
1220 | .mode = 0644, | |
6d456111 | 1221 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1222 | .extra1 = &zero, |
1223 | .extra2 = &one_hundred, | |
1224 | }, | |
1225 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1226 | { |
1da177e4 | 1227 | .procname = "nr_hugepages", |
e5ff2159 | 1228 | .data = NULL, |
1da177e4 LT |
1229 | .maxlen = sizeof(unsigned long), |
1230 | .mode = 0644, | |
6d456111 | 1231 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1232 | .extra1 = (void *)&hugetlb_zero, |
1233 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1234 | }, |
1235 | #ifdef CONFIG_NUMA | |
1236 | { | |
1237 | .procname = "nr_hugepages_mempolicy", | |
1238 | .data = NULL, | |
1239 | .maxlen = sizeof(unsigned long), | |
1240 | .mode = 0644, | |
1241 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1242 | .extra1 = (void *)&hugetlb_zero, | |
1243 | .extra2 = (void *)&hugetlb_infinity, | |
1244 | }, | |
1245 | #endif | |
1da177e4 | 1246 | { |
1da177e4 LT |
1247 | .procname = "hugetlb_shm_group", |
1248 | .data = &sysctl_hugetlb_shm_group, | |
1249 | .maxlen = sizeof(gid_t), | |
1250 | .mode = 0644, | |
6d456111 | 1251 | .proc_handler = proc_dointvec, |
1da177e4 | 1252 | }, |
396faf03 | 1253 | { |
396faf03 MG |
1254 | .procname = "hugepages_treat_as_movable", |
1255 | .data = &hugepages_treat_as_movable, | |
1256 | .maxlen = sizeof(int), | |
1257 | .mode = 0644, | |
86cdb465 | 1258 | .proc_handler = proc_dointvec, |
396faf03 | 1259 | }, |
d1c3fb1f | 1260 | { |
d1c3fb1f | 1261 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1262 | .data = NULL, |
1263 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1264 | .mode = 0644, |
6d456111 | 1265 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1266 | .extra1 = (void *)&hugetlb_zero, |
1267 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1268 | }, |
1da177e4 LT |
1269 | #endif |
1270 | { | |
1da177e4 LT |
1271 | .procname = "lowmem_reserve_ratio", |
1272 | .data = &sysctl_lowmem_reserve_ratio, | |
1273 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1274 | .mode = 0644, | |
6d456111 | 1275 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1276 | }, |
9d0243bc | 1277 | { |
9d0243bc AM |
1278 | .procname = "drop_caches", |
1279 | .data = &sysctl_drop_caches, | |
1280 | .maxlen = sizeof(int), | |
1281 | .mode = 0644, | |
1282 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1283 | .extra1 = &one, |
5509a5d2 | 1284 | .extra2 = &four, |
9d0243bc | 1285 | }, |
76ab0f53 MG |
1286 | #ifdef CONFIG_COMPACTION |
1287 | { | |
1288 | .procname = "compact_memory", | |
1289 | .data = &sysctl_compact_memory, | |
1290 | .maxlen = sizeof(int), | |
1291 | .mode = 0200, | |
1292 | .proc_handler = sysctl_compaction_handler, | |
1293 | }, | |
5e771905 MG |
1294 | { |
1295 | .procname = "extfrag_threshold", | |
1296 | .data = &sysctl_extfrag_threshold, | |
1297 | .maxlen = sizeof(int), | |
1298 | .mode = 0644, | |
1299 | .proc_handler = sysctl_extfrag_handler, | |
1300 | .extra1 = &min_extfrag_threshold, | |
1301 | .extra2 = &max_extfrag_threshold, | |
1302 | }, | |
1303 | ||
76ab0f53 | 1304 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1305 | { |
1da177e4 LT |
1306 | .procname = "min_free_kbytes", |
1307 | .data = &min_free_kbytes, | |
1308 | .maxlen = sizeof(min_free_kbytes), | |
1309 | .mode = 0644, | |
6d456111 | 1310 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1311 | .extra1 = &zero, |
1312 | }, | |
8ad4b1fb | 1313 | { |
8ad4b1fb RS |
1314 | .procname = "percpu_pagelist_fraction", |
1315 | .data = &percpu_pagelist_fraction, | |
1316 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1317 | .mode = 0644, | |
6d456111 | 1318 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1319 | .extra1 = &zero, |
8ad4b1fb | 1320 | }, |
1da177e4 LT |
1321 | #ifdef CONFIG_MMU |
1322 | { | |
1da177e4 LT |
1323 | .procname = "max_map_count", |
1324 | .data = &sysctl_max_map_count, | |
1325 | .maxlen = sizeof(sysctl_max_map_count), | |
1326 | .mode = 0644, | |
3e26120c | 1327 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1328 | .extra1 = &zero, |
1da177e4 | 1329 | }, |
dd8632a1 PM |
1330 | #else |
1331 | { | |
dd8632a1 PM |
1332 | .procname = "nr_trim_pages", |
1333 | .data = &sysctl_nr_trim_pages, | |
1334 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1335 | .mode = 0644, | |
6d456111 | 1336 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1337 | .extra1 = &zero, |
1338 | }, | |
1da177e4 LT |
1339 | #endif |
1340 | { | |
1da177e4 LT |
1341 | .procname = "laptop_mode", |
1342 | .data = &laptop_mode, | |
1343 | .maxlen = sizeof(laptop_mode), | |
1344 | .mode = 0644, | |
6d456111 | 1345 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1346 | }, |
1347 | { | |
1da177e4 LT |
1348 | .procname = "block_dump", |
1349 | .data = &block_dump, | |
1350 | .maxlen = sizeof(block_dump), | |
1351 | .mode = 0644, | |
6d456111 | 1352 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1353 | .extra1 = &zero, |
1354 | }, | |
1355 | { | |
1da177e4 LT |
1356 | .procname = "vfs_cache_pressure", |
1357 | .data = &sysctl_vfs_cache_pressure, | |
1358 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1359 | .mode = 0644, | |
6d456111 | 1360 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1361 | .extra1 = &zero, |
1362 | }, | |
1363 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1364 | { | |
1da177e4 LT |
1365 | .procname = "legacy_va_layout", |
1366 | .data = &sysctl_legacy_va_layout, | |
1367 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1368 | .mode = 0644, | |
6d456111 | 1369 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1370 | .extra1 = &zero, |
1371 | }, | |
1372 | #endif | |
1743660b CL |
1373 | #ifdef CONFIG_NUMA |
1374 | { | |
1743660b CL |
1375 | .procname = "zone_reclaim_mode", |
1376 | .data = &zone_reclaim_mode, | |
1377 | .maxlen = sizeof(zone_reclaim_mode), | |
1378 | .mode = 0644, | |
6d456111 | 1379 | .proc_handler = proc_dointvec, |
c84db23c | 1380 | .extra1 = &zero, |
1743660b | 1381 | }, |
9614634f | 1382 | { |
9614634f CL |
1383 | .procname = "min_unmapped_ratio", |
1384 | .data = &sysctl_min_unmapped_ratio, | |
1385 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1386 | .mode = 0644, | |
6d456111 | 1387 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1388 | .extra1 = &zero, |
1389 | .extra2 = &one_hundred, | |
1390 | }, | |
0ff38490 | 1391 | { |
0ff38490 CL |
1392 | .procname = "min_slab_ratio", |
1393 | .data = &sysctl_min_slab_ratio, | |
1394 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1395 | .mode = 0644, | |
6d456111 | 1396 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1397 | .extra1 = &zero, |
1398 | .extra2 = &one_hundred, | |
1399 | }, | |
e6e5494c | 1400 | #endif |
77461ab3 CL |
1401 | #ifdef CONFIG_SMP |
1402 | { | |
77461ab3 CL |
1403 | .procname = "stat_interval", |
1404 | .data = &sysctl_stat_interval, | |
1405 | .maxlen = sizeof(sysctl_stat_interval), | |
1406 | .mode = 0644, | |
6d456111 | 1407 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1408 | }, |
1409 | #endif | |
6e141546 | 1410 | #ifdef CONFIG_MMU |
ed032189 | 1411 | { |
ed032189 | 1412 | .procname = "mmap_min_addr", |
788084ab EP |
1413 | .data = &dac_mmap_min_addr, |
1414 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1415 | .mode = 0644, |
6d456111 | 1416 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1417 | }, |
6e141546 | 1418 | #endif |
f0c0b2b8 KH |
1419 | #ifdef CONFIG_NUMA |
1420 | { | |
f0c0b2b8 KH |
1421 | .procname = "numa_zonelist_order", |
1422 | .data = &numa_zonelist_order, | |
1423 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1424 | .mode = 0644, | |
6d456111 | 1425 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1426 | }, |
1427 | #endif | |
2b8232ce | 1428 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1429 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1430 | { |
e6e5494c | 1431 | .procname = "vdso_enabled", |
3d7ee969 AL |
1432 | #ifdef CONFIG_X86_32 |
1433 | .data = &vdso32_enabled, | |
1434 | .maxlen = sizeof(vdso32_enabled), | |
1435 | #else | |
e6e5494c IM |
1436 | .data = &vdso_enabled, |
1437 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1438 | #endif |
e6e5494c | 1439 | .mode = 0644, |
6d456111 | 1440 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1441 | .extra1 = &zero, |
1442 | }, | |
1da177e4 | 1443 | #endif |
195cf453 BG |
1444 | #ifdef CONFIG_HIGHMEM |
1445 | { | |
195cf453 BG |
1446 | .procname = "highmem_is_dirtyable", |
1447 | .data = &vm_highmem_is_dirtyable, | |
1448 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1449 | .mode = 0644, | |
6d456111 | 1450 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1451 | .extra1 = &zero, |
1452 | .extra2 = &one, | |
1453 | }, | |
1454 | #endif | |
4be6f6bb | 1455 | { |
4be6f6bb PZ |
1456 | .procname = "scan_unevictable_pages", |
1457 | .data = &scan_unevictable_pages, | |
1458 | .maxlen = sizeof(scan_unevictable_pages), | |
1459 | .mode = 0644, | |
6d456111 | 1460 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1461 | }, |
6a46079c AK |
1462 | #ifdef CONFIG_MEMORY_FAILURE |
1463 | { | |
6a46079c AK |
1464 | .procname = "memory_failure_early_kill", |
1465 | .data = &sysctl_memory_failure_early_kill, | |
1466 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1467 | .mode = 0644, | |
6d456111 | 1468 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1469 | .extra1 = &zero, |
1470 | .extra2 = &one, | |
1471 | }, | |
1472 | { | |
6a46079c AK |
1473 | .procname = "memory_failure_recovery", |
1474 | .data = &sysctl_memory_failure_recovery, | |
1475 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1476 | .mode = 0644, | |
6d456111 | 1477 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1478 | .extra1 = &zero, |
1479 | .extra2 = &one, | |
1480 | }, | |
1481 | #endif | |
c9b1d098 AS |
1482 | { |
1483 | .procname = "user_reserve_kbytes", | |
1484 | .data = &sysctl_user_reserve_kbytes, | |
1485 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1486 | .mode = 0644, | |
1487 | .proc_handler = proc_doulongvec_minmax, | |
1488 | }, | |
4eeab4f5 AS |
1489 | { |
1490 | .procname = "admin_reserve_kbytes", | |
1491 | .data = &sysctl_admin_reserve_kbytes, | |
1492 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1493 | .mode = 0644, | |
1494 | .proc_handler = proc_doulongvec_minmax, | |
1495 | }, | |
6fce56ec | 1496 | { } |
1da177e4 LT |
1497 | }; |
1498 | ||
2abc26fc | 1499 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1500 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1501 | { } |
2abc26fc EB |
1502 | }; |
1503 | #endif | |
1504 | ||
d8217f07 | 1505 | static struct ctl_table fs_table[] = { |
1da177e4 | 1506 | { |
1da177e4 LT |
1507 | .procname = "inode-nr", |
1508 | .data = &inodes_stat, | |
3942c07c | 1509 | .maxlen = 2*sizeof(long), |
1da177e4 | 1510 | .mode = 0444, |
cffbc8aa | 1511 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1512 | }, |
1513 | { | |
1da177e4 LT |
1514 | .procname = "inode-state", |
1515 | .data = &inodes_stat, | |
3942c07c | 1516 | .maxlen = 7*sizeof(long), |
1da177e4 | 1517 | .mode = 0444, |
cffbc8aa | 1518 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1519 | }, |
1520 | { | |
1da177e4 LT |
1521 | .procname = "file-nr", |
1522 | .data = &files_stat, | |
518de9b3 | 1523 | .maxlen = sizeof(files_stat), |
1da177e4 | 1524 | .mode = 0444, |
6d456111 | 1525 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1526 | }, |
1527 | { | |
1da177e4 LT |
1528 | .procname = "file-max", |
1529 | .data = &files_stat.max_files, | |
518de9b3 | 1530 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1531 | .mode = 0644, |
518de9b3 | 1532 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1533 | }, |
9cfe015a | 1534 | { |
9cfe015a ED |
1535 | .procname = "nr_open", |
1536 | .data = &sysctl_nr_open, | |
1537 | .maxlen = sizeof(int), | |
1538 | .mode = 0644, | |
6d456111 | 1539 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1540 | .extra1 = &sysctl_nr_open_min, |
1541 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1542 | }, |
1da177e4 | 1543 | { |
1da177e4 LT |
1544 | .procname = "dentry-state", |
1545 | .data = &dentry_stat, | |
3942c07c | 1546 | .maxlen = 6*sizeof(long), |
1da177e4 | 1547 | .mode = 0444, |
312d3ca8 | 1548 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1549 | }, |
1550 | { | |
1da177e4 LT |
1551 | .procname = "overflowuid", |
1552 | .data = &fs_overflowuid, | |
1553 | .maxlen = sizeof(int), | |
1554 | .mode = 0644, | |
6d456111 | 1555 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1556 | .extra1 = &minolduid, |
1557 | .extra2 = &maxolduid, | |
1558 | }, | |
1559 | { | |
1da177e4 LT |
1560 | .procname = "overflowgid", |
1561 | .data = &fs_overflowgid, | |
1562 | .maxlen = sizeof(int), | |
1563 | .mode = 0644, | |
6d456111 | 1564 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1565 | .extra1 = &minolduid, |
1566 | .extra2 = &maxolduid, | |
1567 | }, | |
bfcd17a6 | 1568 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1569 | { |
1da177e4 LT |
1570 | .procname = "leases-enable", |
1571 | .data = &leases_enable, | |
1572 | .maxlen = sizeof(int), | |
1573 | .mode = 0644, | |
6d456111 | 1574 | .proc_handler = proc_dointvec, |
1da177e4 | 1575 | }, |
bfcd17a6 | 1576 | #endif |
1da177e4 LT |
1577 | #ifdef CONFIG_DNOTIFY |
1578 | { | |
1da177e4 LT |
1579 | .procname = "dir-notify-enable", |
1580 | .data = &dir_notify_enable, | |
1581 | .maxlen = sizeof(int), | |
1582 | .mode = 0644, | |
6d456111 | 1583 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1584 | }, |
1585 | #endif | |
1586 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1587 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1588 | { |
1da177e4 LT |
1589 | .procname = "lease-break-time", |
1590 | .data = &lease_break_time, | |
1591 | .maxlen = sizeof(int), | |
1592 | .mode = 0644, | |
6d456111 | 1593 | .proc_handler = proc_dointvec, |
1da177e4 | 1594 | }, |
bfcd17a6 | 1595 | #endif |
ebf3f09c | 1596 | #ifdef CONFIG_AIO |
1da177e4 | 1597 | { |
1da177e4 LT |
1598 | .procname = "aio-nr", |
1599 | .data = &aio_nr, | |
1600 | .maxlen = sizeof(aio_nr), | |
1601 | .mode = 0444, | |
6d456111 | 1602 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1603 | }, |
1604 | { | |
1da177e4 LT |
1605 | .procname = "aio-max-nr", |
1606 | .data = &aio_max_nr, | |
1607 | .maxlen = sizeof(aio_max_nr), | |
1608 | .mode = 0644, | |
6d456111 | 1609 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1610 | }, |
ebf3f09c | 1611 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1612 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1613 | { |
0399cb08 RL |
1614 | .procname = "inotify", |
1615 | .mode = 0555, | |
1616 | .child = inotify_table, | |
1617 | }, | |
1618 | #endif | |
7ef9964e DL |
1619 | #ifdef CONFIG_EPOLL |
1620 | { | |
1621 | .procname = "epoll", | |
1622 | .mode = 0555, | |
1623 | .child = epoll_table, | |
1624 | }, | |
1625 | #endif | |
1da177e4 | 1626 | #endif |
800179c9 KC |
1627 | { |
1628 | .procname = "protected_symlinks", | |
1629 | .data = &sysctl_protected_symlinks, | |
1630 | .maxlen = sizeof(int), | |
1631 | .mode = 0600, | |
1632 | .proc_handler = proc_dointvec_minmax, | |
1633 | .extra1 = &zero, | |
1634 | .extra2 = &one, | |
1635 | }, | |
1636 | { | |
1637 | .procname = "protected_hardlinks", | |
1638 | .data = &sysctl_protected_hardlinks, | |
1639 | .maxlen = sizeof(int), | |
1640 | .mode = 0600, | |
1641 | .proc_handler = proc_dointvec_minmax, | |
1642 | .extra1 = &zero, | |
1643 | .extra2 = &one, | |
1644 | }, | |
d6e71144 | 1645 | { |
d6e71144 AC |
1646 | .procname = "suid_dumpable", |
1647 | .data = &suid_dumpable, | |
1648 | .maxlen = sizeof(int), | |
1649 | .mode = 0644, | |
54b50199 | 1650 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1651 | .extra1 = &zero, |
1652 | .extra2 = &two, | |
d6e71144 | 1653 | }, |
2abc26fc EB |
1654 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1655 | { | |
2abc26fc EB |
1656 | .procname = "binfmt_misc", |
1657 | .mode = 0555, | |
1658 | .child = binfmt_misc_table, | |
1659 | }, | |
1660 | #endif | |
b492e95b | 1661 | { |
ff9da691 JA |
1662 | .procname = "pipe-max-size", |
1663 | .data = &pipe_max_size, | |
b492e95b JA |
1664 | .maxlen = sizeof(int), |
1665 | .mode = 0644, | |
ff9da691 JA |
1666 | .proc_handler = &pipe_proc_fn, |
1667 | .extra1 = &pipe_min_size, | |
b492e95b | 1668 | }, |
6fce56ec | 1669 | { } |
1da177e4 LT |
1670 | }; |
1671 | ||
d8217f07 | 1672 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1673 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1674 | { |
abd4f750 MAS |
1675 | .procname = "exception-trace", |
1676 | .data = &show_unhandled_signals, | |
1677 | .maxlen = sizeof(int), | |
1678 | .mode = 0644, | |
1679 | .proc_handler = proc_dointvec | |
1680 | }, | |
b2be84df MH |
1681 | #endif |
1682 | #if defined(CONFIG_OPTPROBES) | |
1683 | { | |
1684 | .procname = "kprobes-optimization", | |
1685 | .data = &sysctl_kprobes_optimization, | |
1686 | .maxlen = sizeof(int), | |
1687 | .mode = 0644, | |
1688 | .proc_handler = proc_kprobes_optimization_handler, | |
1689 | .extra1 = &zero, | |
1690 | .extra2 = &one, | |
1691 | }, | |
abd4f750 | 1692 | #endif |
6fce56ec | 1693 | { } |
1da177e4 LT |
1694 | }; |
1695 | ||
d8217f07 | 1696 | static struct ctl_table dev_table[] = { |
6fce56ec | 1697 | { } |
0eeca283 | 1698 | }; |
1da177e4 | 1699 | |
de4e83bd | 1700 | int __init sysctl_init(void) |
d912b0cc | 1701 | { |
fd4b616b SR |
1702 | struct ctl_table_header *hdr; |
1703 | ||
1704 | hdr = register_sysctl_table(sysctl_base_table); | |
1705 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1706 | return 0; |
1707 | } | |
1708 | ||
b89a8171 EB |
1709 | #endif /* CONFIG_SYSCTL */ |
1710 | ||
1da177e4 LT |
1711 | /* |
1712 | * /proc/sys support | |
1713 | */ | |
1714 | ||
b89a8171 | 1715 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1716 | |
f8808300 KC |
1717 | static int _proc_do_string(char *data, int maxlen, int write, |
1718 | char __user *buffer, | |
b1ba4ddd | 1719 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1720 | { |
1721 | size_t len; | |
1722 | char __user *p; | |
1723 | char c; | |
8d060877 ON |
1724 | |
1725 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1726 | *lenp = 0; |
1727 | return 0; | |
1728 | } | |
8d060877 | 1729 | |
1da177e4 | 1730 | if (write) { |
f4aacea2 KC |
1731 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1732 | /* Only continue writes not past the end of buffer. */ | |
1733 | len = strlen(data); | |
1734 | if (len > maxlen - 1) | |
1735 | len = maxlen - 1; | |
1736 | ||
1737 | if (*ppos > len) | |
1738 | return 0; | |
1739 | len = *ppos; | |
1740 | } else { | |
1741 | /* Start writing from beginning of buffer. */ | |
1742 | len = 0; | |
1743 | } | |
1744 | ||
2ca9bb45 | 1745 | *ppos += *lenp; |
1da177e4 | 1746 | p = buffer; |
2ca9bb45 | 1747 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1748 | if (get_user(c, p++)) |
1749 | return -EFAULT; | |
1750 | if (c == 0 || c == '\n') | |
1751 | break; | |
2ca9bb45 | 1752 | data[len++] = c; |
1da177e4 | 1753 | } |
f8808300 | 1754 | data[len] = 0; |
1da177e4 | 1755 | } else { |
f5dd3d6f SV |
1756 | len = strlen(data); |
1757 | if (len > maxlen) | |
1758 | len = maxlen; | |
8d060877 ON |
1759 | |
1760 | if (*ppos > len) { | |
1761 | *lenp = 0; | |
1762 | return 0; | |
1763 | } | |
1764 | ||
1765 | data += *ppos; | |
1766 | len -= *ppos; | |
1767 | ||
1da177e4 LT |
1768 | if (len > *lenp) |
1769 | len = *lenp; | |
1770 | if (len) | |
f8808300 | 1771 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1772 | return -EFAULT; |
1773 | if (len < *lenp) { | |
f8808300 | 1774 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1775 | return -EFAULT; |
1776 | len++; | |
1777 | } | |
1778 | *lenp = len; | |
1779 | *ppos += len; | |
1780 | } | |
1781 | return 0; | |
1782 | } | |
1783 | ||
f4aacea2 KC |
1784 | static void warn_sysctl_write(struct ctl_table *table) |
1785 | { | |
1786 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1787 | "This will not be supported in the future. To silence this\n" | |
1788 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1789 | current->comm, table->procname); | |
1790 | } | |
1791 | ||
f5dd3d6f SV |
1792 | /** |
1793 | * proc_dostring - read a string sysctl | |
1794 | * @table: the sysctl table | |
1795 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1796 | * @buffer: the user buffer |
1797 | * @lenp: the size of the user buffer | |
1798 | * @ppos: file position | |
1799 | * | |
1800 | * Reads/writes a string from/to the user buffer. If the kernel | |
1801 | * buffer provided is not large enough to hold the string, the | |
1802 | * string is truncated. The copied string is %NULL-terminated. | |
1803 | * If the string is being read by the user process, it is copied | |
1804 | * and a newline '\n' is added. It is truncated if the buffer is | |
1805 | * not large enough. | |
1806 | * | |
1807 | * Returns 0 on success. | |
1808 | */ | |
8d65af78 | 1809 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1810 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1811 | { | |
f4aacea2 KC |
1812 | if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) |
1813 | warn_sysctl_write(table); | |
1814 | ||
f8808300 KC |
1815 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
1816 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
1817 | } |
1818 | ||
00b7c339 AW |
1819 | static size_t proc_skip_spaces(char **buf) |
1820 | { | |
1821 | size_t ret; | |
1822 | char *tmp = skip_spaces(*buf); | |
1823 | ret = tmp - *buf; | |
1824 | *buf = tmp; | |
1825 | return ret; | |
1826 | } | |
1827 | ||
9f977fb7 OP |
1828 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1829 | { | |
1830 | while (*size) { | |
1831 | if (**buf != v) | |
1832 | break; | |
1833 | (*size)--; | |
1834 | (*buf)++; | |
1835 | } | |
1836 | } | |
1837 | ||
00b7c339 AW |
1838 | #define TMPBUFLEN 22 |
1839 | /** | |
0fc377bd | 1840 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1841 | * |
0fc377bd RD |
1842 | * @buf: a kernel buffer |
1843 | * @size: size of the kernel buffer | |
1844 | * @val: this is where the number will be stored | |
1845 | * @neg: set to %TRUE if number is negative | |
1846 | * @perm_tr: a vector which contains the allowed trailers | |
1847 | * @perm_tr_len: size of the perm_tr vector | |
1848 | * @tr: pointer to store the trailer character | |
00b7c339 | 1849 | * |
0fc377bd RD |
1850 | * In case of success %0 is returned and @buf and @size are updated with |
1851 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1852 | * character exists (size is non-zero after returning from this | |
1853 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1854 | */ |
1855 | static int proc_get_long(char **buf, size_t *size, | |
1856 | unsigned long *val, bool *neg, | |
1857 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1858 | { | |
1859 | int len; | |
1860 | char *p, tmp[TMPBUFLEN]; | |
1861 | ||
1862 | if (!*size) | |
1863 | return -EINVAL; | |
1864 | ||
1865 | len = *size; | |
1866 | if (len > TMPBUFLEN - 1) | |
1867 | len = TMPBUFLEN - 1; | |
1868 | ||
1869 | memcpy(tmp, *buf, len); | |
1870 | ||
1871 | tmp[len] = 0; | |
1872 | p = tmp; | |
1873 | if (*p == '-' && *size > 1) { | |
1874 | *neg = true; | |
1875 | p++; | |
1876 | } else | |
1877 | *neg = false; | |
1878 | if (!isdigit(*p)) | |
1879 | return -EINVAL; | |
1880 | ||
1881 | *val = simple_strtoul(p, &p, 0); | |
1882 | ||
1883 | len = p - tmp; | |
1884 | ||
1885 | /* We don't know if the next char is whitespace thus we may accept | |
1886 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
1887 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
1888 | if (len == TMPBUFLEN - 1) | |
1889 | return -EINVAL; | |
1890 | ||
1891 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
1892 | return -EINVAL; | |
1da177e4 | 1893 | |
00b7c339 AW |
1894 | if (tr && (len < *size)) |
1895 | *tr = *p; | |
1896 | ||
1897 | *buf += len; | |
1898 | *size -= len; | |
1899 | ||
1900 | return 0; | |
1901 | } | |
1902 | ||
1903 | /** | |
0fc377bd | 1904 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 1905 | * |
0fc377bd RD |
1906 | * @buf: the user buffer |
1907 | * @size: the size of the user buffer | |
1908 | * @val: the integer to be converted | |
1909 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 1910 | * |
0fc377bd RD |
1911 | * In case of success %0 is returned and @buf and @size are updated with |
1912 | * the amount of bytes written. | |
00b7c339 AW |
1913 | */ |
1914 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
1915 | bool neg) | |
1916 | { | |
1917 | int len; | |
1918 | char tmp[TMPBUFLEN], *p = tmp; | |
1919 | ||
1920 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
1921 | len = strlen(tmp); | |
1922 | if (len > *size) | |
1923 | len = *size; | |
1924 | if (copy_to_user(*buf, tmp, len)) | |
1925 | return -EFAULT; | |
1926 | *size -= len; | |
1927 | *buf += len; | |
1928 | return 0; | |
1929 | } | |
1930 | #undef TMPBUFLEN | |
1931 | ||
1932 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
1933 | { | |
1934 | if (*size) { | |
1935 | char __user **buffer = (char __user **)buf; | |
1936 | if (put_user(c, *buffer)) | |
1937 | return -EFAULT; | |
1938 | (*size)--, (*buffer)++; | |
1939 | *buf = *buffer; | |
1940 | } | |
1941 | return 0; | |
1942 | } | |
1da177e4 | 1943 | |
00b7c339 | 1944 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1945 | int *valp, |
1946 | int write, void *data) | |
1947 | { | |
1948 | if (write) { | |
1949 | *valp = *negp ? -*lvalp : *lvalp; | |
1950 | } else { | |
1951 | int val = *valp; | |
1952 | if (val < 0) { | |
00b7c339 | 1953 | *negp = true; |
1da177e4 LT |
1954 | *lvalp = (unsigned long)-val; |
1955 | } else { | |
00b7c339 | 1956 | *negp = false; |
1da177e4 LT |
1957 | *lvalp = (unsigned long)val; |
1958 | } | |
1959 | } | |
1960 | return 0; | |
1961 | } | |
1962 | ||
00b7c339 AW |
1963 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
1964 | ||
d8217f07 | 1965 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 1966 | int write, void __user *buffer, |
fcfbd547 | 1967 | size_t *lenp, loff_t *ppos, |
00b7c339 | 1968 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
1969 | int write, void *data), |
1970 | void *data) | |
1971 | { | |
00b7c339 AW |
1972 | int *i, vleft, first = 1, err = 0; |
1973 | unsigned long page = 0; | |
1974 | size_t left; | |
1975 | char *kbuf; | |
1da177e4 | 1976 | |
00b7c339 | 1977 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
1978 | *lenp = 0; |
1979 | return 0; | |
1980 | } | |
1981 | ||
fcfbd547 | 1982 | i = (int *) tbl_data; |
1da177e4 LT |
1983 | vleft = table->maxlen / sizeof(*i); |
1984 | left = *lenp; | |
1985 | ||
1986 | if (!conv) | |
1987 | conv = do_proc_dointvec_conv; | |
1988 | ||
00b7c339 | 1989 | if (write) { |
f4aacea2 KC |
1990 | if (*ppos) { |
1991 | switch (sysctl_writes_strict) { | |
1992 | case SYSCTL_WRITES_STRICT: | |
1993 | goto out; | |
1994 | case SYSCTL_WRITES_WARN: | |
1995 | warn_sysctl_write(table); | |
1996 | break; | |
1997 | default: | |
1998 | break; | |
1999 | } | |
2000 | } | |
2001 | ||
00b7c339 AW |
2002 | if (left > PAGE_SIZE - 1) |
2003 | left = PAGE_SIZE - 1; | |
2004 | page = __get_free_page(GFP_TEMPORARY); | |
2005 | kbuf = (char *) page; | |
2006 | if (!kbuf) | |
2007 | return -ENOMEM; | |
2008 | if (copy_from_user(kbuf, buffer, left)) { | |
2009 | err = -EFAULT; | |
2010 | goto free; | |
2011 | } | |
2012 | kbuf[left] = 0; | |
2013 | } | |
2014 | ||
1da177e4 | 2015 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2016 | unsigned long lval; |
2017 | bool neg; | |
1da177e4 | 2018 | |
00b7c339 AW |
2019 | if (write) { |
2020 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 2021 | |
563b0467 O |
2022 | if (!left) |
2023 | break; | |
00b7c339 AW |
2024 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
2025 | proc_wspace_sep, | |
2026 | sizeof(proc_wspace_sep), NULL); | |
2027 | if (err) | |
1da177e4 | 2028 | break; |
00b7c339 AW |
2029 | if (conv(&neg, &lval, i, 1, data)) { |
2030 | err = -EINVAL; | |
1da177e4 | 2031 | break; |
00b7c339 | 2032 | } |
1da177e4 | 2033 | } else { |
00b7c339 AW |
2034 | if (conv(&neg, &lval, i, 0, data)) { |
2035 | err = -EINVAL; | |
2036 | break; | |
2037 | } | |
1da177e4 | 2038 | if (!first) |
00b7c339 AW |
2039 | err = proc_put_char(&buffer, &left, '\t'); |
2040 | if (err) | |
2041 | break; | |
2042 | err = proc_put_long(&buffer, &left, lval, neg); | |
2043 | if (err) | |
1da177e4 | 2044 | break; |
1da177e4 LT |
2045 | } |
2046 | } | |
2047 | ||
00b7c339 AW |
2048 | if (!write && !first && left && !err) |
2049 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2050 | if (write && !err && left) |
00b7c339 AW |
2051 | left -= proc_skip_spaces(&kbuf); |
2052 | free: | |
1da177e4 | 2053 | if (write) { |
00b7c339 AW |
2054 | free_page(page); |
2055 | if (first) | |
2056 | return err ? : -EINVAL; | |
1da177e4 | 2057 | } |
1da177e4 | 2058 | *lenp -= left; |
f4aacea2 | 2059 | out: |
1da177e4 | 2060 | *ppos += *lenp; |
00b7c339 | 2061 | return err; |
1da177e4 LT |
2062 | } |
2063 | ||
8d65af78 | 2064 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2065 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2066 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2067 | int write, void *data), |
2068 | void *data) | |
2069 | { | |
8d65af78 | 2070 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2071 | buffer, lenp, ppos, conv, data); |
2072 | } | |
2073 | ||
1da177e4 LT |
2074 | /** |
2075 | * proc_dointvec - read a vector of integers | |
2076 | * @table: the sysctl table | |
2077 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2078 | * @buffer: the user buffer |
2079 | * @lenp: the size of the user buffer | |
2080 | * @ppos: file position | |
2081 | * | |
2082 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2083 | * values from/to the user buffer, treated as an ASCII string. | |
2084 | * | |
2085 | * Returns 0 on success. | |
2086 | */ | |
8d65af78 | 2087 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2088 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2089 | { | |
8d65af78 | 2090 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2091 | NULL,NULL); |
2092 | } | |
2093 | ||
34f5a398 | 2094 | /* |
25ddbb18 AK |
2095 | * Taint values can only be increased |
2096 | * This means we can safely use a temporary. | |
34f5a398 | 2097 | */ |
8d65af78 | 2098 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2099 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2100 | { | |
25ddbb18 AK |
2101 | struct ctl_table t; |
2102 | unsigned long tmptaint = get_taint(); | |
2103 | int err; | |
34f5a398 | 2104 | |
91fcd412 | 2105 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2106 | return -EPERM; |
2107 | ||
25ddbb18 AK |
2108 | t = *table; |
2109 | t.data = &tmptaint; | |
8d65af78 | 2110 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2111 | if (err < 0) |
2112 | return err; | |
2113 | ||
2114 | if (write) { | |
2115 | /* | |
2116 | * Poor man's atomic or. Not worth adding a primitive | |
2117 | * to everyone's atomic.h for this | |
2118 | */ | |
2119 | int i; | |
2120 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2121 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2122 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2123 | } |
2124 | } | |
2125 | ||
2126 | return err; | |
34f5a398 TT |
2127 | } |
2128 | ||
bfdc0b49 | 2129 | #ifdef CONFIG_PRINTK |
620f6e8e | 2130 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2131 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2132 | { | |
2133 | if (write && !capable(CAP_SYS_ADMIN)) | |
2134 | return -EPERM; | |
2135 | ||
2136 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2137 | } | |
2138 | #endif | |
2139 | ||
1da177e4 LT |
2140 | struct do_proc_dointvec_minmax_conv_param { |
2141 | int *min; | |
2142 | int *max; | |
2143 | }; | |
2144 | ||
00b7c339 AW |
2145 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2146 | int *valp, | |
1da177e4 LT |
2147 | int write, void *data) |
2148 | { | |
2149 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2150 | if (write) { | |
2151 | int val = *negp ? -*lvalp : *lvalp; | |
2152 | if ((param->min && *param->min > val) || | |
2153 | (param->max && *param->max < val)) | |
2154 | return -EINVAL; | |
2155 | *valp = val; | |
2156 | } else { | |
2157 | int val = *valp; | |
2158 | if (val < 0) { | |
00b7c339 | 2159 | *negp = true; |
1da177e4 LT |
2160 | *lvalp = (unsigned long)-val; |
2161 | } else { | |
00b7c339 | 2162 | *negp = false; |
1da177e4 LT |
2163 | *lvalp = (unsigned long)val; |
2164 | } | |
2165 | } | |
2166 | return 0; | |
2167 | } | |
2168 | ||
2169 | /** | |
2170 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2171 | * @table: the sysctl table | |
2172 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2173 | * @buffer: the user buffer |
2174 | * @lenp: the size of the user buffer | |
2175 | * @ppos: file position | |
2176 | * | |
2177 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2178 | * values from/to the user buffer, treated as an ASCII string. | |
2179 | * | |
2180 | * This routine will ensure the values are within the range specified by | |
2181 | * table->extra1 (min) and table->extra2 (max). | |
2182 | * | |
2183 | * Returns 0 on success. | |
2184 | */ | |
8d65af78 | 2185 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2186 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2187 | { | |
2188 | struct do_proc_dointvec_minmax_conv_param param = { | |
2189 | .min = (int *) table->extra1, | |
2190 | .max = (int *) table->extra2, | |
2191 | }; | |
8d65af78 | 2192 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2193 | do_proc_dointvec_minmax_conv, ¶m); |
2194 | } | |
2195 | ||
54b50199 KC |
2196 | static void validate_coredump_safety(void) |
2197 | { | |
046d662f | 2198 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2199 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 KC |
2200 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
2201 | printk(KERN_WARNING "Unsafe core_pattern used with "\ | |
2202 | "suid_dumpable=2. Pipe handler or fully qualified "\ | |
2203 | "core dump path required.\n"); | |
2204 | } | |
046d662f | 2205 | #endif |
54b50199 KC |
2206 | } |
2207 | ||
2208 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2209 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2210 | { | |
2211 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2212 | if (!error) | |
2213 | validate_coredump_safety(); | |
2214 | return error; | |
2215 | } | |
2216 | ||
046d662f | 2217 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2218 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2219 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2220 | { | |
2221 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2222 | if (!error) | |
2223 | validate_coredump_safety(); | |
2224 | return error; | |
2225 | } | |
046d662f | 2226 | #endif |
54b50199 | 2227 | |
d8217f07 | 2228 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2229 | void __user *buffer, |
2230 | size_t *lenp, loff_t *ppos, | |
2231 | unsigned long convmul, | |
2232 | unsigned long convdiv) | |
2233 | { | |
00b7c339 AW |
2234 | unsigned long *i, *min, *max; |
2235 | int vleft, first = 1, err = 0; | |
2236 | unsigned long page = 0; | |
2237 | size_t left; | |
2238 | char *kbuf; | |
2239 | ||
2240 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2241 | *lenp = 0; |
2242 | return 0; | |
2243 | } | |
00b7c339 | 2244 | |
fcfbd547 | 2245 | i = (unsigned long *) data; |
1da177e4 LT |
2246 | min = (unsigned long *) table->extra1; |
2247 | max = (unsigned long *) table->extra2; | |
2248 | vleft = table->maxlen / sizeof(unsigned long); | |
2249 | left = *lenp; | |
00b7c339 AW |
2250 | |
2251 | if (write) { | |
f4aacea2 KC |
2252 | if (*ppos) { |
2253 | switch (sysctl_writes_strict) { | |
2254 | case SYSCTL_WRITES_STRICT: | |
2255 | goto out; | |
2256 | case SYSCTL_WRITES_WARN: | |
2257 | warn_sysctl_write(table); | |
2258 | break; | |
2259 | default: | |
2260 | break; | |
2261 | } | |
2262 | } | |
2263 | ||
00b7c339 AW |
2264 | if (left > PAGE_SIZE - 1) |
2265 | left = PAGE_SIZE - 1; | |
2266 | page = __get_free_page(GFP_TEMPORARY); | |
2267 | kbuf = (char *) page; | |
2268 | if (!kbuf) | |
2269 | return -ENOMEM; | |
2270 | if (copy_from_user(kbuf, buffer, left)) { | |
2271 | err = -EFAULT; | |
2272 | goto free; | |
2273 | } | |
2274 | kbuf[left] = 0; | |
2275 | } | |
2276 | ||
27b3d80a | 2277 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2278 | unsigned long val; |
2279 | ||
1da177e4 | 2280 | if (write) { |
00b7c339 AW |
2281 | bool neg; |
2282 | ||
2283 | left -= proc_skip_spaces(&kbuf); | |
2284 | ||
2285 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2286 | proc_wspace_sep, | |
2287 | sizeof(proc_wspace_sep), NULL); | |
2288 | if (err) | |
1da177e4 LT |
2289 | break; |
2290 | if (neg) | |
1da177e4 LT |
2291 | continue; |
2292 | if ((min && val < *min) || (max && val > *max)) | |
2293 | continue; | |
2294 | *i = val; | |
2295 | } else { | |
00b7c339 | 2296 | val = convdiv * (*i) / convmul; |
7833819d | 2297 | if (!first) { |
00b7c339 | 2298 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2299 | if (err) |
2300 | break; | |
2301 | } | |
00b7c339 AW |
2302 | err = proc_put_long(&buffer, &left, val, false); |
2303 | if (err) | |
2304 | break; | |
1da177e4 LT |
2305 | } |
2306 | } | |
2307 | ||
00b7c339 AW |
2308 | if (!write && !first && left && !err) |
2309 | err = proc_put_char(&buffer, &left, '\n'); | |
2310 | if (write && !err) | |
2311 | left -= proc_skip_spaces(&kbuf); | |
2312 | free: | |
1da177e4 | 2313 | if (write) { |
00b7c339 AW |
2314 | free_page(page); |
2315 | if (first) | |
2316 | return err ? : -EINVAL; | |
1da177e4 | 2317 | } |
1da177e4 | 2318 | *lenp -= left; |
f4aacea2 | 2319 | out: |
1da177e4 | 2320 | *ppos += *lenp; |
00b7c339 | 2321 | return err; |
1da177e4 LT |
2322 | } |
2323 | ||
d8217f07 | 2324 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2325 | void __user *buffer, |
2326 | size_t *lenp, loff_t *ppos, | |
2327 | unsigned long convmul, | |
2328 | unsigned long convdiv) | |
2329 | { | |
2330 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2331 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2332 | } |
2333 | ||
1da177e4 LT |
2334 | /** |
2335 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2336 | * @table: the sysctl table | |
2337 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2338 | * @buffer: the user buffer |
2339 | * @lenp: the size of the user buffer | |
2340 | * @ppos: file position | |
2341 | * | |
2342 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2343 | * values from/to the user buffer, treated as an ASCII string. | |
2344 | * | |
2345 | * This routine will ensure the values are within the range specified by | |
2346 | * table->extra1 (min) and table->extra2 (max). | |
2347 | * | |
2348 | * Returns 0 on success. | |
2349 | */ | |
8d65af78 | 2350 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2351 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2352 | { | |
8d65af78 | 2353 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2354 | } |
2355 | ||
2356 | /** | |
2357 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2358 | * @table: the sysctl table | |
2359 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2360 | * @buffer: the user buffer |
2361 | * @lenp: the size of the user buffer | |
2362 | * @ppos: file position | |
2363 | * | |
2364 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2365 | * values from/to the user buffer, treated as an ASCII string. The values | |
2366 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2367 | * | |
2368 | * This routine will ensure the values are within the range specified by | |
2369 | * table->extra1 (min) and table->extra2 (max). | |
2370 | * | |
2371 | * Returns 0 on success. | |
2372 | */ | |
d8217f07 | 2373 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2374 | void __user *buffer, |
2375 | size_t *lenp, loff_t *ppos) | |
2376 | { | |
8d65af78 | 2377 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2378 | lenp, ppos, HZ, 1000l); |
2379 | } | |
2380 | ||
2381 | ||
00b7c339 | 2382 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2383 | int *valp, |
2384 | int write, void *data) | |
2385 | { | |
2386 | if (write) { | |
cba9f33d BS |
2387 | if (*lvalp > LONG_MAX / HZ) |
2388 | return 1; | |
1da177e4 LT |
2389 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2390 | } else { | |
2391 | int val = *valp; | |
2392 | unsigned long lval; | |
2393 | if (val < 0) { | |
00b7c339 | 2394 | *negp = true; |
1da177e4 LT |
2395 | lval = (unsigned long)-val; |
2396 | } else { | |
00b7c339 | 2397 | *negp = false; |
1da177e4 LT |
2398 | lval = (unsigned long)val; |
2399 | } | |
2400 | *lvalp = lval / HZ; | |
2401 | } | |
2402 | return 0; | |
2403 | } | |
2404 | ||
00b7c339 | 2405 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2406 | int *valp, |
2407 | int write, void *data) | |
2408 | { | |
2409 | if (write) { | |
cba9f33d BS |
2410 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2411 | return 1; | |
1da177e4 LT |
2412 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2413 | } else { | |
2414 | int val = *valp; | |
2415 | unsigned long lval; | |
2416 | if (val < 0) { | |
00b7c339 | 2417 | *negp = true; |
1da177e4 LT |
2418 | lval = (unsigned long)-val; |
2419 | } else { | |
00b7c339 | 2420 | *negp = false; |
1da177e4 LT |
2421 | lval = (unsigned long)val; |
2422 | } | |
2423 | *lvalp = jiffies_to_clock_t(lval); | |
2424 | } | |
2425 | return 0; | |
2426 | } | |
2427 | ||
00b7c339 | 2428 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2429 | int *valp, |
2430 | int write, void *data) | |
2431 | { | |
2432 | if (write) { | |
d738ce8f FF |
2433 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2434 | ||
2435 | if (jif > INT_MAX) | |
2436 | return 1; | |
2437 | *valp = (int)jif; | |
1da177e4 LT |
2438 | } else { |
2439 | int val = *valp; | |
2440 | unsigned long lval; | |
2441 | if (val < 0) { | |
00b7c339 | 2442 | *negp = true; |
1da177e4 LT |
2443 | lval = (unsigned long)-val; |
2444 | } else { | |
00b7c339 | 2445 | *negp = false; |
1da177e4 LT |
2446 | lval = (unsigned long)val; |
2447 | } | |
2448 | *lvalp = jiffies_to_msecs(lval); | |
2449 | } | |
2450 | return 0; | |
2451 | } | |
2452 | ||
2453 | /** | |
2454 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2455 | * @table: the sysctl table | |
2456 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2457 | * @buffer: the user buffer |
2458 | * @lenp: the size of the user buffer | |
2459 | * @ppos: file position | |
2460 | * | |
2461 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2462 | * values from/to the user buffer, treated as an ASCII string. | |
2463 | * The values read are assumed to be in seconds, and are converted into | |
2464 | * jiffies. | |
2465 | * | |
2466 | * Returns 0 on success. | |
2467 | */ | |
8d65af78 | 2468 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2469 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2470 | { | |
8d65af78 | 2471 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2472 | do_proc_dointvec_jiffies_conv,NULL); |
2473 | } | |
2474 | ||
2475 | /** | |
2476 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2477 | * @table: the sysctl table | |
2478 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2479 | * @buffer: the user buffer |
2480 | * @lenp: the size of the user buffer | |
1e5d5331 | 2481 | * @ppos: pointer to the file position |
1da177e4 LT |
2482 | * |
2483 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2484 | * values from/to the user buffer, treated as an ASCII string. | |
2485 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2486 | * are converted into jiffies. | |
2487 | * | |
2488 | * Returns 0 on success. | |
2489 | */ | |
8d65af78 | 2490 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2491 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2492 | { | |
8d65af78 | 2493 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2494 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2495 | } | |
2496 | ||
2497 | /** | |
2498 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2499 | * @table: the sysctl table | |
2500 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2501 | * @buffer: the user buffer |
2502 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2503 | * @ppos: file position |
2504 | * @ppos: the current position in the file | |
1da177e4 LT |
2505 | * |
2506 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2507 | * values from/to the user buffer, treated as an ASCII string. | |
2508 | * The values read are assumed to be in 1/1000 seconds, and | |
2509 | * are converted into jiffies. | |
2510 | * | |
2511 | * Returns 0 on success. | |
2512 | */ | |
8d65af78 | 2513 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2514 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2515 | { | |
8d65af78 | 2516 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2517 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2518 | } | |
2519 | ||
8d65af78 | 2520 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2521 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2522 | { | |
2523 | struct pid *new_pid; | |
2524 | pid_t tmp; | |
2525 | int r; | |
2526 | ||
6c5f3e7b | 2527 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2528 | |
8d65af78 | 2529 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2530 | lenp, ppos, NULL, NULL); |
2531 | if (r || !write) | |
2532 | return r; | |
2533 | ||
2534 | new_pid = find_get_pid(tmp); | |
2535 | if (!new_pid) | |
2536 | return -ESRCH; | |
2537 | ||
2538 | put_pid(xchg(&cad_pid, new_pid)); | |
2539 | return 0; | |
2540 | } | |
2541 | ||
9f977fb7 OP |
2542 | /** |
2543 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2544 | * @table: the sysctl table | |
2545 | * @write: %TRUE if this is a write to the sysctl file | |
2546 | * @buffer: the user buffer | |
2547 | * @lenp: the size of the user buffer | |
2548 | * @ppos: file position | |
2549 | * | |
2550 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2551 | * in table->maxlen. | |
2552 | * | |
2553 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2554 | * large bitmaps may be represented in a compact manner. Writing into | |
2555 | * the file will clear the bitmap then update it with the given input. | |
2556 | * | |
2557 | * Returns 0 on success. | |
2558 | */ | |
2559 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2560 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2561 | { | |
2562 | int err = 0; | |
2563 | bool first = 1; | |
2564 | size_t left = *lenp; | |
2565 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 2566 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
2567 | unsigned long *tmp_bitmap = NULL; |
2568 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2569 | ||
122ff243 | 2570 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
2571 | *lenp = 0; |
2572 | return 0; | |
2573 | } | |
2574 | ||
2575 | if (write) { | |
2576 | unsigned long page = 0; | |
2577 | char *kbuf; | |
2578 | ||
2579 | if (left > PAGE_SIZE - 1) | |
2580 | left = PAGE_SIZE - 1; | |
2581 | ||
2582 | page = __get_free_page(GFP_TEMPORARY); | |
2583 | kbuf = (char *) page; | |
2584 | if (!kbuf) | |
2585 | return -ENOMEM; | |
2586 | if (copy_from_user(kbuf, buffer, left)) { | |
2587 | free_page(page); | |
2588 | return -EFAULT; | |
2589 | } | |
2590 | kbuf[left] = 0; | |
2591 | ||
2592 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2593 | GFP_KERNEL); | |
2594 | if (!tmp_bitmap) { | |
2595 | free_page(page); | |
2596 | return -ENOMEM; | |
2597 | } | |
2598 | proc_skip_char(&kbuf, &left, '\n'); | |
2599 | while (!err && left) { | |
2600 | unsigned long val_a, val_b; | |
2601 | bool neg; | |
2602 | ||
2603 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2604 | sizeof(tr_a), &c); | |
2605 | if (err) | |
2606 | break; | |
2607 | if (val_a >= bitmap_len || neg) { | |
2608 | err = -EINVAL; | |
2609 | break; | |
2610 | } | |
2611 | ||
2612 | val_b = val_a; | |
2613 | if (left) { | |
2614 | kbuf++; | |
2615 | left--; | |
2616 | } | |
2617 | ||
2618 | if (c == '-') { | |
2619 | err = proc_get_long(&kbuf, &left, &val_b, | |
2620 | &neg, tr_b, sizeof(tr_b), | |
2621 | &c); | |
2622 | if (err) | |
2623 | break; | |
2624 | if (val_b >= bitmap_len || neg || | |
2625 | val_a > val_b) { | |
2626 | err = -EINVAL; | |
2627 | break; | |
2628 | } | |
2629 | if (left) { | |
2630 | kbuf++; | |
2631 | left--; | |
2632 | } | |
2633 | } | |
2634 | ||
5a04cca6 | 2635 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 OP |
2636 | first = 0; |
2637 | proc_skip_char(&kbuf, &left, '\n'); | |
2638 | } | |
2639 | free_page(page); | |
2640 | } else { | |
2641 | unsigned long bit_a, bit_b = 0; | |
2642 | ||
2643 | while (left) { | |
2644 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2645 | if (bit_a >= bitmap_len) | |
2646 | break; | |
2647 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2648 | bit_a + 1) - 1; | |
2649 | ||
2650 | if (!first) { | |
2651 | err = proc_put_char(&buffer, &left, ','); | |
2652 | if (err) | |
2653 | break; | |
2654 | } | |
2655 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2656 | if (err) | |
2657 | break; | |
2658 | if (bit_a != bit_b) { | |
2659 | err = proc_put_char(&buffer, &left, '-'); | |
2660 | if (err) | |
2661 | break; | |
2662 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2663 | if (err) | |
2664 | break; | |
2665 | } | |
2666 | ||
2667 | first = 0; bit_b++; | |
2668 | } | |
2669 | if (!err) | |
2670 | err = proc_put_char(&buffer, &left, '\n'); | |
2671 | } | |
2672 | ||
2673 | if (!err) { | |
2674 | if (write) { | |
2675 | if (*ppos) | |
2676 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2677 | else | |
5a04cca6 | 2678 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2679 | } |
2680 | kfree(tmp_bitmap); | |
2681 | *lenp -= left; | |
2682 | *ppos += *lenp; | |
2683 | return 0; | |
2684 | } else { | |
2685 | kfree(tmp_bitmap); | |
2686 | return err; | |
2687 | } | |
2688 | } | |
2689 | ||
55610500 | 2690 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2691 | |
8d65af78 | 2692 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2693 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2694 | { | |
2695 | return -ENOSYS; | |
2696 | } | |
2697 | ||
8d65af78 | 2698 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2699 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2700 | { |
2701 | return -ENOSYS; | |
2702 | } | |
2703 | ||
8d65af78 | 2704 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2705 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2706 | { | |
2707 | return -ENOSYS; | |
2708 | } | |
2709 | ||
8d65af78 | 2710 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2711 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2712 | { | |
2713 | return -ENOSYS; | |
2714 | } | |
2715 | ||
8d65af78 | 2716 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2717 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2718 | { | |
2719 | return -ENOSYS; | |
2720 | } | |
2721 | ||
8d65af78 | 2722 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2723 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2724 | { | |
2725 | return -ENOSYS; | |
2726 | } | |
2727 | ||
8d65af78 | 2728 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2729 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2730 | { | |
2731 | return -ENOSYS; | |
2732 | } | |
2733 | ||
d8217f07 | 2734 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2735 | void __user *buffer, |
2736 | size_t *lenp, loff_t *ppos) | |
2737 | { | |
2738 | return -ENOSYS; | |
2739 | } | |
2740 | ||
2741 | ||
55610500 | 2742 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2743 | |
1da177e4 LT |
2744 | /* |
2745 | * No sense putting this after each symbol definition, twice, | |
2746 | * exception granted :-) | |
2747 | */ | |
2748 | EXPORT_SYMBOL(proc_dointvec); | |
2749 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2750 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2751 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2752 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2753 | EXPORT_SYMBOL(proc_dostring); | |
2754 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2755 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |