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; | |
8ad4b1fb | 139 | static int min_percpu_pagelist_fract = 8; |
1da177e4 LT |
140 | |
141 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 142 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 143 | |
80df2847 LH |
144 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
145 | #ifdef CONFIG_DETECT_HUNG_TASK | |
146 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
147 | #endif | |
148 | ||
d14f1729 DY |
149 | #ifdef CONFIG_INOTIFY_USER |
150 | #include <linux/inotify.h> | |
151 | #endif | |
72c57ed5 | 152 | #ifdef CONFIG_SPARC |
1da177e4 LT |
153 | #endif |
154 | ||
0871420f DM |
155 | #ifdef CONFIG_SPARC64 |
156 | extern int sysctl_tsb_ratio; | |
157 | #endif | |
158 | ||
1da177e4 LT |
159 | #ifdef __hppa__ |
160 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
161 | #endif |
162 | ||
163 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
164 | extern int unaligned_enabled; |
165 | #endif | |
1da177e4 | 166 | |
d2b176ed | 167 | #ifdef CONFIG_IA64 |
88fc241f | 168 | extern int unaligned_dump_stack; |
d2b176ed JS |
169 | #endif |
170 | ||
b6fca725 VG |
171 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
172 | extern int no_unaligned_warning; | |
173 | #endif | |
174 | ||
d6f8ff73 | 175 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 176 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 177 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 178 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 179 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 180 | #endif |
9ec52099 | 181 | |
bfdc0b49 | 182 | #ifdef CONFIG_PRINTK |
620f6e8e | 183 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
184 | void __user *buffer, size_t *lenp, loff_t *ppos); |
185 | #endif | |
186 | ||
54b50199 KC |
187 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
188 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 189 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
190 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
191 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 192 | #endif |
54b50199 | 193 | |
97f5f0cd | 194 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 195 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 196 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd DT |
197 | |
198 | static int sysrq_sysctl_handler(ctl_table *table, int write, | |
199 | void __user *buffer, size_t *lenp, | |
200 | loff_t *ppos) | |
201 | { | |
202 | int error; | |
203 | ||
204 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
205 | if (error) | |
206 | return error; | |
207 | ||
208 | if (write) | |
209 | sysrq_toggle_support(__sysrq_enabled); | |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | #endif | |
215 | ||
d8217f07 EB |
216 | static struct ctl_table kern_table[]; |
217 | static struct ctl_table vm_table[]; | |
218 | static struct ctl_table fs_table[]; | |
219 | static struct ctl_table debug_table[]; | |
220 | static struct ctl_table dev_table[]; | |
221 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
222 | #ifdef CONFIG_EPOLL |
223 | extern struct ctl_table epoll_table[]; | |
224 | #endif | |
1da177e4 LT |
225 | |
226 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
227 | int sysctl_legacy_va_layout; | |
228 | #endif | |
229 | ||
1da177e4 LT |
230 | /* The default sysctl tables: */ |
231 | ||
de4e83bd | 232 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 233 | { |
1da177e4 LT |
234 | .procname = "kernel", |
235 | .mode = 0555, | |
236 | .child = kern_table, | |
237 | }, | |
238 | { | |
1da177e4 LT |
239 | .procname = "vm", |
240 | .mode = 0555, | |
241 | .child = vm_table, | |
242 | }, | |
1da177e4 | 243 | { |
1da177e4 LT |
244 | .procname = "fs", |
245 | .mode = 0555, | |
246 | .child = fs_table, | |
247 | }, | |
248 | { | |
1da177e4 LT |
249 | .procname = "debug", |
250 | .mode = 0555, | |
251 | .child = debug_table, | |
252 | }, | |
253 | { | |
1da177e4 LT |
254 | .procname = "dev", |
255 | .mode = 0555, | |
256 | .child = dev_table, | |
257 | }, | |
6fce56ec | 258 | { } |
1da177e4 LT |
259 | }; |
260 | ||
77e54a1f | 261 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
262 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
263 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
264 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
265 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 266 | #ifdef CONFIG_SMP |
1983a922 CE |
267 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
268 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
269 | #endif /* CONFIG_SMP */ |
270 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 271 | |
5e771905 MG |
272 | #ifdef CONFIG_COMPACTION |
273 | static int min_extfrag_threshold; | |
274 | static int max_extfrag_threshold = 1000; | |
275 | #endif | |
276 | ||
d8217f07 | 277 | static struct ctl_table kern_table[] = { |
2bba22c5 | 278 | { |
2bba22c5 MG |
279 | .procname = "sched_child_runs_first", |
280 | .data = &sysctl_sched_child_runs_first, | |
281 | .maxlen = sizeof(unsigned int), | |
282 | .mode = 0644, | |
6d456111 | 283 | .proc_handler = proc_dointvec, |
2bba22c5 | 284 | }, |
77e54a1f IM |
285 | #ifdef CONFIG_SCHED_DEBUG |
286 | { | |
b2be5e96 PZ |
287 | .procname = "sched_min_granularity_ns", |
288 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
289 | .maxlen = sizeof(unsigned int), |
290 | .mode = 0644, | |
702a7c76 | 291 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
292 | .extra1 = &min_sched_granularity_ns, |
293 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 294 | }, |
21805085 | 295 | { |
21805085 PZ |
296 | .procname = "sched_latency_ns", |
297 | .data = &sysctl_sched_latency, | |
298 | .maxlen = sizeof(unsigned int), | |
299 | .mode = 0644, | |
702a7c76 | 300 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
301 | .extra1 = &min_sched_granularity_ns, |
302 | .extra2 = &max_sched_granularity_ns, | |
303 | }, | |
77e54a1f | 304 | { |
77e54a1f IM |
305 | .procname = "sched_wakeup_granularity_ns", |
306 | .data = &sysctl_sched_wakeup_granularity, | |
307 | .maxlen = sizeof(unsigned int), | |
308 | .mode = 0644, | |
702a7c76 | 309 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
310 | .extra1 = &min_wakeup_granularity_ns, |
311 | .extra2 = &max_wakeup_granularity_ns, | |
312 | }, | |
cbee9f88 | 313 | #ifdef CONFIG_SMP |
1983a922 | 314 | { |
1983a922 CE |
315 | .procname = "sched_tunable_scaling", |
316 | .data = &sysctl_sched_tunable_scaling, | |
317 | .maxlen = sizeof(enum sched_tunable_scaling), | |
318 | .mode = 0644, | |
702a7c76 | 319 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
320 | .extra1 = &min_sched_tunable_scaling, |
321 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 322 | }, |
da84d961 | 323 | { |
d00535db | 324 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
325 | .data = &sysctl_sched_migration_cost, |
326 | .maxlen = sizeof(unsigned int), | |
327 | .mode = 0644, | |
6d456111 | 328 | .proc_handler = proc_dointvec, |
da84d961 | 329 | }, |
b82d9fdd | 330 | { |
b82d9fdd PZ |
331 | .procname = "sched_nr_migrate", |
332 | .data = &sysctl_sched_nr_migrate, | |
333 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 334 | .mode = 0644, |
6d456111 | 335 | .proc_handler = proc_dointvec, |
fa85ae24 | 336 | }, |
e9e9250b | 337 | { |
d00535db | 338 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
339 | .data = &sysctl_sched_time_avg, |
340 | .maxlen = sizeof(unsigned int), | |
341 | .mode = 0644, | |
6d456111 | 342 | .proc_handler = proc_dointvec, |
e9e9250b | 343 | }, |
a7a4f8a7 | 344 | { |
d00535db | 345 | .procname = "sched_shares_window_ns", |
a7a4f8a7 PT |
346 | .data = &sysctl_sched_shares_window, |
347 | .maxlen = sizeof(unsigned int), | |
348 | .mode = 0644, | |
349 | .proc_handler = proc_dointvec, | |
350 | }, | |
cd1bb94b | 351 | { |
cd1bb94b AB |
352 | .procname = "timer_migration", |
353 | .data = &sysctl_timer_migration, | |
354 | .maxlen = sizeof(unsigned int), | |
355 | .mode = 0644, | |
6d456111 | 356 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
357 | .extra1 = &zero, |
358 | .extra2 = &one, | |
fa85ae24 | 359 | }, |
cbee9f88 PZ |
360 | #endif /* CONFIG_SMP */ |
361 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
362 | { |
363 | .procname = "numa_balancing_scan_delay_ms", | |
364 | .data = &sysctl_numa_balancing_scan_delay, | |
365 | .maxlen = sizeof(unsigned int), | |
366 | .mode = 0644, | |
367 | .proc_handler = proc_dointvec, | |
368 | }, | |
cbee9f88 PZ |
369 | { |
370 | .procname = "numa_balancing_scan_period_min_ms", | |
371 | .data = &sysctl_numa_balancing_scan_period_min, | |
372 | .maxlen = sizeof(unsigned int), | |
373 | .mode = 0644, | |
374 | .proc_handler = proc_dointvec, | |
375 | }, | |
376 | { | |
377 | .procname = "numa_balancing_scan_period_max_ms", | |
378 | .data = &sysctl_numa_balancing_scan_period_max, | |
379 | .maxlen = sizeof(unsigned int), | |
380 | .mode = 0644, | |
381 | .proc_handler = proc_dointvec, | |
382 | }, | |
6e5fb223 PZ |
383 | { |
384 | .procname = "numa_balancing_scan_size_mb", | |
385 | .data = &sysctl_numa_balancing_scan_size, | |
386 | .maxlen = sizeof(unsigned int), | |
387 | .mode = 0644, | |
388 | .proc_handler = proc_dointvec, | |
389 | }, | |
54a43d54 AK |
390 | { |
391 | .procname = "numa_balancing", | |
392 | .data = NULL, /* filled in by handler */ | |
393 | .maxlen = sizeof(unsigned int), | |
394 | .mode = 0644, | |
395 | .proc_handler = sysctl_numa_balancing, | |
396 | .extra1 = &zero, | |
397 | .extra2 = &one, | |
398 | }, | |
cbee9f88 PZ |
399 | #endif /* CONFIG_NUMA_BALANCING */ |
400 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 401 | { |
9f0c1e56 PZ |
402 | .procname = "sched_rt_period_us", |
403 | .data = &sysctl_sched_rt_period, | |
404 | .maxlen = sizeof(unsigned int), | |
405 | .mode = 0644, | |
6d456111 | 406 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
407 | }, |
408 | { | |
9f0c1e56 PZ |
409 | .procname = "sched_rt_runtime_us", |
410 | .data = &sysctl_sched_rt_runtime, | |
411 | .maxlen = sizeof(int), | |
412 | .mode = 0644, | |
6d456111 | 413 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 414 | }, |
ce0dbbbb CW |
415 | { |
416 | .procname = "sched_rr_timeslice_ms", | |
417 | .data = &sched_rr_timeslice, | |
418 | .maxlen = sizeof(int), | |
419 | .mode = 0644, | |
420 | .proc_handler = sched_rr_handler, | |
421 | }, | |
5091faa4 MG |
422 | #ifdef CONFIG_SCHED_AUTOGROUP |
423 | { | |
424 | .procname = "sched_autogroup_enabled", | |
425 | .data = &sysctl_sched_autogroup_enabled, | |
426 | .maxlen = sizeof(unsigned int), | |
427 | .mode = 0644, | |
1747b21f | 428 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
429 | .extra1 = &zero, |
430 | .extra2 = &one, | |
431 | }, | |
432 | #endif | |
ec12cb7f PT |
433 | #ifdef CONFIG_CFS_BANDWIDTH |
434 | { | |
435 | .procname = "sched_cfs_bandwidth_slice_us", | |
436 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
437 | .maxlen = sizeof(unsigned int), | |
438 | .mode = 0644, | |
439 | .proc_handler = proc_dointvec_minmax, | |
440 | .extra1 = &one, | |
441 | }, | |
442 | #endif | |
f20786ff PZ |
443 | #ifdef CONFIG_PROVE_LOCKING |
444 | { | |
f20786ff PZ |
445 | .procname = "prove_locking", |
446 | .data = &prove_locking, | |
447 | .maxlen = sizeof(int), | |
448 | .mode = 0644, | |
6d456111 | 449 | .proc_handler = proc_dointvec, |
f20786ff PZ |
450 | }, |
451 | #endif | |
452 | #ifdef CONFIG_LOCK_STAT | |
453 | { | |
f20786ff PZ |
454 | .procname = "lock_stat", |
455 | .data = &lock_stat, | |
456 | .maxlen = sizeof(int), | |
457 | .mode = 0644, | |
6d456111 | 458 | .proc_handler = proc_dointvec, |
f20786ff | 459 | }, |
77e54a1f | 460 | #endif |
1da177e4 | 461 | { |
1da177e4 LT |
462 | .procname = "panic", |
463 | .data = &panic_timeout, | |
464 | .maxlen = sizeof(int), | |
465 | .mode = 0644, | |
6d456111 | 466 | .proc_handler = proc_dointvec, |
1da177e4 | 467 | }, |
046d662f | 468 | #ifdef CONFIG_COREDUMP |
1da177e4 | 469 | { |
1da177e4 LT |
470 | .procname = "core_uses_pid", |
471 | .data = &core_uses_pid, | |
472 | .maxlen = sizeof(int), | |
473 | .mode = 0644, | |
6d456111 | 474 | .proc_handler = proc_dointvec, |
1da177e4 LT |
475 | }, |
476 | { | |
1da177e4 LT |
477 | .procname = "core_pattern", |
478 | .data = core_pattern, | |
71ce92f3 | 479 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 480 | .mode = 0644, |
54b50199 | 481 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 482 | }, |
a293980c | 483 | { |
a293980c NH |
484 | .procname = "core_pipe_limit", |
485 | .data = &core_pipe_limit, | |
486 | .maxlen = sizeof(unsigned int), | |
487 | .mode = 0644, | |
6d456111 | 488 | .proc_handler = proc_dointvec, |
a293980c | 489 | }, |
046d662f | 490 | #endif |
34f5a398 | 491 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 492 | { |
1da177e4 | 493 | .procname = "tainted", |
25ddbb18 | 494 | .maxlen = sizeof(long), |
34f5a398 | 495 | .mode = 0644, |
6d456111 | 496 | .proc_handler = proc_taint, |
1da177e4 | 497 | }, |
34f5a398 | 498 | #endif |
9745512c AV |
499 | #ifdef CONFIG_LATENCYTOP |
500 | { | |
501 | .procname = "latencytop", | |
502 | .data = &latencytop_enabled, | |
503 | .maxlen = sizeof(int), | |
504 | .mode = 0644, | |
6d456111 | 505 | .proc_handler = proc_dointvec, |
9745512c AV |
506 | }, |
507 | #endif | |
1da177e4 LT |
508 | #ifdef CONFIG_BLK_DEV_INITRD |
509 | { | |
1da177e4 LT |
510 | .procname = "real-root-dev", |
511 | .data = &real_root_dev, | |
512 | .maxlen = sizeof(int), | |
513 | .mode = 0644, | |
6d456111 | 514 | .proc_handler = proc_dointvec, |
1da177e4 LT |
515 | }, |
516 | #endif | |
45807a1d | 517 | { |
45807a1d IM |
518 | .procname = "print-fatal-signals", |
519 | .data = &print_fatal_signals, | |
520 | .maxlen = sizeof(int), | |
521 | .mode = 0644, | |
6d456111 | 522 | .proc_handler = proc_dointvec, |
45807a1d | 523 | }, |
72c57ed5 | 524 | #ifdef CONFIG_SPARC |
1da177e4 | 525 | { |
1da177e4 LT |
526 | .procname = "reboot-cmd", |
527 | .data = reboot_command, | |
528 | .maxlen = 256, | |
529 | .mode = 0644, | |
6d456111 | 530 | .proc_handler = proc_dostring, |
1da177e4 LT |
531 | }, |
532 | { | |
1da177e4 LT |
533 | .procname = "stop-a", |
534 | .data = &stop_a_enabled, | |
535 | .maxlen = sizeof (int), | |
536 | .mode = 0644, | |
6d456111 | 537 | .proc_handler = proc_dointvec, |
1da177e4 LT |
538 | }, |
539 | { | |
1da177e4 LT |
540 | .procname = "scons-poweroff", |
541 | .data = &scons_pwroff, | |
542 | .maxlen = sizeof (int), | |
543 | .mode = 0644, | |
6d456111 | 544 | .proc_handler = proc_dointvec, |
1da177e4 LT |
545 | }, |
546 | #endif | |
0871420f DM |
547 | #ifdef CONFIG_SPARC64 |
548 | { | |
0871420f DM |
549 | .procname = "tsb-ratio", |
550 | .data = &sysctl_tsb_ratio, | |
551 | .maxlen = sizeof (int), | |
552 | .mode = 0644, | |
6d456111 | 553 | .proc_handler = proc_dointvec, |
0871420f DM |
554 | }, |
555 | #endif | |
1da177e4 LT |
556 | #ifdef __hppa__ |
557 | { | |
1da177e4 LT |
558 | .procname = "soft-power", |
559 | .data = &pwrsw_enabled, | |
560 | .maxlen = sizeof (int), | |
561 | .mode = 0644, | |
6d456111 | 562 | .proc_handler = proc_dointvec, |
1da177e4 | 563 | }, |
bf14e3b9 VG |
564 | #endif |
565 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 566 | { |
1da177e4 LT |
567 | .procname = "unaligned-trap", |
568 | .data = &unaligned_enabled, | |
569 | .maxlen = sizeof (int), | |
570 | .mode = 0644, | |
6d456111 | 571 | .proc_handler = proc_dointvec, |
1da177e4 LT |
572 | }, |
573 | #endif | |
574 | { | |
1da177e4 LT |
575 | .procname = "ctrl-alt-del", |
576 | .data = &C_A_D, | |
577 | .maxlen = sizeof(int), | |
578 | .mode = 0644, | |
6d456111 | 579 | .proc_handler = proc_dointvec, |
1da177e4 | 580 | }, |
606576ce | 581 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 582 | { |
b0fc494f SR |
583 | .procname = "ftrace_enabled", |
584 | .data = &ftrace_enabled, | |
585 | .maxlen = sizeof(int), | |
586 | .mode = 0644, | |
6d456111 | 587 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
588 | }, |
589 | #endif | |
f38f1d2a SR |
590 | #ifdef CONFIG_STACK_TRACER |
591 | { | |
f38f1d2a SR |
592 | .procname = "stack_tracer_enabled", |
593 | .data = &stack_tracer_enabled, | |
594 | .maxlen = sizeof(int), | |
595 | .mode = 0644, | |
6d456111 | 596 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
597 | }, |
598 | #endif | |
944ac425 SR |
599 | #ifdef CONFIG_TRACING |
600 | { | |
3299b4dd | 601 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
602 | .data = &ftrace_dump_on_oops, |
603 | .maxlen = sizeof(int), | |
604 | .mode = 0644, | |
6d456111 | 605 | .proc_handler = proc_dointvec, |
944ac425 | 606 | }, |
de7edd31 SRRH |
607 | { |
608 | .procname = "traceoff_on_warning", | |
609 | .data = &__disable_trace_on_warning, | |
610 | .maxlen = sizeof(__disable_trace_on_warning), | |
611 | .mode = 0644, | |
612 | .proc_handler = proc_dointvec, | |
613 | }, | |
944ac425 | 614 | #endif |
7984754b KC |
615 | #ifdef CONFIG_KEXEC |
616 | { | |
617 | .procname = "kexec_load_disabled", | |
618 | .data = &kexec_load_disabled, | |
619 | .maxlen = sizeof(int), | |
620 | .mode = 0644, | |
621 | /* only handle a transition from default "0" to "1" */ | |
622 | .proc_handler = proc_dointvec_minmax, | |
623 | .extra1 = &one, | |
624 | .extra2 = &one, | |
625 | }, | |
626 | #endif | |
a1ef5adb | 627 | #ifdef CONFIG_MODULES |
1da177e4 | 628 | { |
1da177e4 LT |
629 | .procname = "modprobe", |
630 | .data = &modprobe_path, | |
631 | .maxlen = KMOD_PATH_LEN, | |
632 | .mode = 0644, | |
6d456111 | 633 | .proc_handler = proc_dostring, |
1da177e4 | 634 | }, |
3d43321b | 635 | { |
3d43321b KC |
636 | .procname = "modules_disabled", |
637 | .data = &modules_disabled, | |
638 | .maxlen = sizeof(int), | |
639 | .mode = 0644, | |
640 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 641 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
642 | .extra1 = &one, |
643 | .extra2 = &one, | |
644 | }, | |
1da177e4 | 645 | #endif |
3b572b50 | 646 | |
1da177e4 | 647 | { |
1da177e4 | 648 | .procname = "hotplug", |
312c004d KS |
649 | .data = &uevent_helper, |
650 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 651 | .mode = 0644, |
6d456111 | 652 | .proc_handler = proc_dostring, |
1da177e4 | 653 | }, |
3b572b50 | 654 | |
1da177e4 LT |
655 | #ifdef CONFIG_CHR_DEV_SG |
656 | { | |
1da177e4 LT |
657 | .procname = "sg-big-buff", |
658 | .data = &sg_big_buff, | |
659 | .maxlen = sizeof (int), | |
660 | .mode = 0444, | |
6d456111 | 661 | .proc_handler = proc_dointvec, |
1da177e4 LT |
662 | }, |
663 | #endif | |
664 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
665 | { | |
1da177e4 LT |
666 | .procname = "acct", |
667 | .data = &acct_parm, | |
668 | .maxlen = 3*sizeof(int), | |
669 | .mode = 0644, | |
6d456111 | 670 | .proc_handler = proc_dointvec, |
1da177e4 LT |
671 | }, |
672 | #endif | |
1da177e4 LT |
673 | #ifdef CONFIG_MAGIC_SYSRQ |
674 | { | |
1da177e4 | 675 | .procname = "sysrq", |
5d6f647f | 676 | .data = &__sysrq_enabled, |
1da177e4 LT |
677 | .maxlen = sizeof (int), |
678 | .mode = 0644, | |
97f5f0cd | 679 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
680 | }, |
681 | #endif | |
d6f8ff73 | 682 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 683 | { |
1da177e4 | 684 | .procname = "cad_pid", |
9ec52099 | 685 | .data = NULL, |
1da177e4 LT |
686 | .maxlen = sizeof (int), |
687 | .mode = 0600, | |
6d456111 | 688 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 689 | }, |
d6f8ff73 | 690 | #endif |
1da177e4 | 691 | { |
1da177e4 LT |
692 | .procname = "threads-max", |
693 | .data = &max_threads, | |
694 | .maxlen = sizeof(int), | |
695 | .mode = 0644, | |
6d456111 | 696 | .proc_handler = proc_dointvec, |
1da177e4 LT |
697 | }, |
698 | { | |
1da177e4 LT |
699 | .procname = "random", |
700 | .mode = 0555, | |
701 | .child = random_table, | |
702 | }, | |
17f60a7d EP |
703 | { |
704 | .procname = "usermodehelper", | |
705 | .mode = 0555, | |
706 | .child = usermodehelper_table, | |
707 | }, | |
1da177e4 | 708 | { |
1da177e4 LT |
709 | .procname = "overflowuid", |
710 | .data = &overflowuid, | |
711 | .maxlen = sizeof(int), | |
712 | .mode = 0644, | |
6d456111 | 713 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
714 | .extra1 = &minolduid, |
715 | .extra2 = &maxolduid, | |
716 | }, | |
717 | { | |
1da177e4 LT |
718 | .procname = "overflowgid", |
719 | .data = &overflowgid, | |
720 | .maxlen = sizeof(int), | |
721 | .mode = 0644, | |
6d456111 | 722 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
723 | .extra1 = &minolduid, |
724 | .extra2 = &maxolduid, | |
725 | }, | |
347a8dc3 | 726 | #ifdef CONFIG_S390 |
1da177e4 LT |
727 | #ifdef CONFIG_MATHEMU |
728 | { | |
1da177e4 LT |
729 | .procname = "ieee_emulation_warnings", |
730 | .data = &sysctl_ieee_emulation_warnings, | |
731 | .maxlen = sizeof(int), | |
732 | .mode = 0644, | |
6d456111 | 733 | .proc_handler = proc_dointvec, |
1da177e4 | 734 | }, |
1da177e4 LT |
735 | #endif |
736 | { | |
1da177e4 | 737 | .procname = "userprocess_debug", |
ab3c68ee | 738 | .data = &show_unhandled_signals, |
1da177e4 LT |
739 | .maxlen = sizeof(int), |
740 | .mode = 0644, | |
6d456111 | 741 | .proc_handler = proc_dointvec, |
1da177e4 LT |
742 | }, |
743 | #endif | |
744 | { | |
1da177e4 LT |
745 | .procname = "pid_max", |
746 | .data = &pid_max, | |
747 | .maxlen = sizeof (int), | |
748 | .mode = 0644, | |
6d456111 | 749 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
750 | .extra1 = &pid_max_min, |
751 | .extra2 = &pid_max_max, | |
752 | }, | |
753 | { | |
1da177e4 LT |
754 | .procname = "panic_on_oops", |
755 | .data = &panic_on_oops, | |
756 | .maxlen = sizeof(int), | |
757 | .mode = 0644, | |
6d456111 | 758 | .proc_handler = proc_dointvec, |
1da177e4 | 759 | }, |
7ef3d2fd JP |
760 | #if defined CONFIG_PRINTK |
761 | { | |
7ef3d2fd JP |
762 | .procname = "printk", |
763 | .data = &console_loglevel, | |
764 | .maxlen = 4*sizeof(int), | |
765 | .mode = 0644, | |
6d456111 | 766 | .proc_handler = proc_dointvec, |
7ef3d2fd | 767 | }, |
1da177e4 | 768 | { |
1da177e4 | 769 | .procname = "printk_ratelimit", |
717115e1 | 770 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
771 | .maxlen = sizeof(int), |
772 | .mode = 0644, | |
6d456111 | 773 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
774 | }, |
775 | { | |
1da177e4 | 776 | .procname = "printk_ratelimit_burst", |
717115e1 | 777 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
778 | .maxlen = sizeof(int), |
779 | .mode = 0644, | |
6d456111 | 780 | .proc_handler = proc_dointvec, |
1da177e4 | 781 | }, |
af91322e | 782 | { |
af91322e DY |
783 | .procname = "printk_delay", |
784 | .data = &printk_delay_msec, | |
785 | .maxlen = sizeof(int), | |
786 | .mode = 0644, | |
6d456111 | 787 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
788 | .extra1 = &zero, |
789 | .extra2 = &ten_thousand, | |
790 | }, | |
eaf06b24 DR |
791 | { |
792 | .procname = "dmesg_restrict", | |
793 | .data = &dmesg_restrict, | |
794 | .maxlen = sizeof(int), | |
795 | .mode = 0644, | |
620f6e8e | 796 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
797 | .extra1 = &zero, |
798 | .extra2 = &one, | |
799 | }, | |
455cd5ab DR |
800 | { |
801 | .procname = "kptr_restrict", | |
802 | .data = &kptr_restrict, | |
803 | .maxlen = sizeof(int), | |
804 | .mode = 0644, | |
620f6e8e | 805 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
806 | .extra1 = &zero, |
807 | .extra2 = &two, | |
808 | }, | |
df6e61d4 | 809 | #endif |
1da177e4 | 810 | { |
1da177e4 LT |
811 | .procname = "ngroups_max", |
812 | .data = &ngroups_max, | |
813 | .maxlen = sizeof (int), | |
814 | .mode = 0444, | |
6d456111 | 815 | .proc_handler = proc_dointvec, |
1da177e4 | 816 | }, |
73efc039 DB |
817 | { |
818 | .procname = "cap_last_cap", | |
819 | .data = (void *)&cap_last_cap, | |
820 | .maxlen = sizeof(int), | |
821 | .mode = 0444, | |
822 | .proc_handler = proc_dointvec, | |
823 | }, | |
58687acb | 824 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 825 | { |
58687acb | 826 | .procname = "watchdog", |
3c00ea82 | 827 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
828 | .maxlen = sizeof (int), |
829 | .mode = 0644, | |
586692a5 MSB |
830 | .proc_handler = proc_dowatchdog, |
831 | .extra1 = &zero, | |
832 | .extra2 = &one, | |
58687acb DZ |
833 | }, |
834 | { | |
835 | .procname = "watchdog_thresh", | |
586692a5 | 836 | .data = &watchdog_thresh, |
58687acb DZ |
837 | .maxlen = sizeof(int), |
838 | .mode = 0644, | |
586692a5 | 839 | .proc_handler = proc_dowatchdog, |
a6572f84 | 840 | .extra1 = &zero, |
58687acb | 841 | .extra2 = &sixty, |
504d7cf1 | 842 | }, |
2508ce18 DZ |
843 | { |
844 | .procname = "softlockup_panic", | |
845 | .data = &softlockup_panic, | |
846 | .maxlen = sizeof(int), | |
847 | .mode = 0644, | |
848 | .proc_handler = proc_dointvec_minmax, | |
849 | .extra1 = &zero, | |
850 | .extra2 = &one, | |
851 | }, | |
5dc30558 DZ |
852 | { |
853 | .procname = "nmi_watchdog", | |
3c00ea82 | 854 | .data = &watchdog_user_enabled, |
5dc30558 DZ |
855 | .maxlen = sizeof (int), |
856 | .mode = 0644, | |
586692a5 MSB |
857 | .proc_handler = proc_dowatchdog, |
858 | .extra1 = &zero, | |
859 | .extra2 = &one, | |
5dc30558 DZ |
860 | }, |
861 | #endif | |
862 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
863 | { | |
864 | .procname = "unknown_nmi_panic", | |
865 | .data = &unknown_nmi_panic, | |
866 | .maxlen = sizeof (int), | |
867 | .mode = 0644, | |
868 | .proc_handler = proc_dointvec, | |
869 | }, | |
504d7cf1 | 870 | #endif |
1da177e4 | 871 | #if defined(CONFIG_X86) |
8da5adda | 872 | { |
8da5adda DZ |
873 | .procname = "panic_on_unrecovered_nmi", |
874 | .data = &panic_on_unrecovered_nmi, | |
875 | .maxlen = sizeof(int), | |
876 | .mode = 0644, | |
6d456111 | 877 | .proc_handler = proc_dointvec, |
8da5adda | 878 | }, |
5211a242 | 879 | { |
5211a242 KG |
880 | .procname = "panic_on_io_nmi", |
881 | .data = &panic_on_io_nmi, | |
882 | .maxlen = sizeof(int), | |
883 | .mode = 0644, | |
6d456111 | 884 | .proc_handler = proc_dointvec, |
5211a242 | 885 | }, |
55af7796 MH |
886 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
887 | { | |
888 | .procname = "panic_on_stackoverflow", | |
889 | .data = &sysctl_panic_on_stackoverflow, | |
890 | .maxlen = sizeof(int), | |
891 | .mode = 0644, | |
892 | .proc_handler = proc_dointvec, | |
893 | }, | |
894 | #endif | |
1da177e4 | 895 | { |
1da177e4 LT |
896 | .procname = "bootloader_type", |
897 | .data = &bootloader_type, | |
898 | .maxlen = sizeof (int), | |
899 | .mode = 0444, | |
6d456111 | 900 | .proc_handler = proc_dointvec, |
1da177e4 | 901 | }, |
5031296c | 902 | { |
5031296c PA |
903 | .procname = "bootloader_version", |
904 | .data = &bootloader_version, | |
905 | .maxlen = sizeof (int), | |
906 | .mode = 0444, | |
6d456111 | 907 | .proc_handler = proc_dointvec, |
5031296c | 908 | }, |
0741f4d2 | 909 | { |
0741f4d2 CE |
910 | .procname = "kstack_depth_to_print", |
911 | .data = &kstack_depth_to_print, | |
912 | .maxlen = sizeof(int), | |
913 | .mode = 0644, | |
6d456111 | 914 | .proc_handler = proc_dointvec, |
0741f4d2 | 915 | }, |
6e7c4025 | 916 | { |
6e7c4025 IM |
917 | .procname = "io_delay_type", |
918 | .data = &io_delay_type, | |
919 | .maxlen = sizeof(int), | |
920 | .mode = 0644, | |
6d456111 | 921 | .proc_handler = proc_dointvec, |
6e7c4025 | 922 | }, |
1da177e4 | 923 | #endif |
7a9166e3 | 924 | #if defined(CONFIG_MMU) |
1da177e4 | 925 | { |
1da177e4 LT |
926 | .procname = "randomize_va_space", |
927 | .data = &randomize_va_space, | |
928 | .maxlen = sizeof(int), | |
929 | .mode = 0644, | |
6d456111 | 930 | .proc_handler = proc_dointvec, |
1da177e4 | 931 | }, |
7a9166e3 | 932 | #endif |
0152fb37 | 933 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 934 | { |
951f22d5 MS |
935 | .procname = "spin_retry", |
936 | .data = &spin_retry, | |
937 | .maxlen = sizeof (int), | |
938 | .mode = 0644, | |
6d456111 | 939 | .proc_handler = proc_dointvec, |
951f22d5 | 940 | }, |
c255d844 | 941 | #endif |
673d5b43 | 942 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 943 | { |
c255d844 | 944 | .procname = "acpi_video_flags", |
77afcf78 | 945 | .data = &acpi_realmode_flags, |
c255d844 PM |
946 | .maxlen = sizeof (unsigned long), |
947 | .mode = 0644, | |
6d456111 | 948 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 949 | }, |
d2b176ed | 950 | #endif |
b6fca725 | 951 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 952 | { |
d2b176ed JS |
953 | .procname = "ignore-unaligned-usertrap", |
954 | .data = &no_unaligned_warning, | |
955 | .maxlen = sizeof (int), | |
956 | .mode = 0644, | |
6d456111 | 957 | .proc_handler = proc_dointvec, |
d2b176ed | 958 | }, |
b6fca725 VG |
959 | #endif |
960 | #ifdef CONFIG_IA64 | |
88fc241f | 961 | { |
88fc241f DC |
962 | .procname = "unaligned-dump-stack", |
963 | .data = &unaligned_dump_stack, | |
964 | .maxlen = sizeof (int), | |
965 | .mode = 0644, | |
6d456111 | 966 | .proc_handler = proc_dointvec, |
88fc241f | 967 | }, |
bebfa101 | 968 | #endif |
e162b39a MSB |
969 | #ifdef CONFIG_DETECT_HUNG_TASK |
970 | { | |
e162b39a MSB |
971 | .procname = "hung_task_panic", |
972 | .data = &sysctl_hung_task_panic, | |
973 | .maxlen = sizeof(int), | |
974 | .mode = 0644, | |
6d456111 | 975 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
976 | .extra1 = &zero, |
977 | .extra2 = &one, | |
978 | }, | |
82a1fcb9 | 979 | { |
82a1fcb9 IM |
980 | .procname = "hung_task_check_count", |
981 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 982 | .maxlen = sizeof(int), |
82a1fcb9 | 983 | .mode = 0644, |
cd64647f LZ |
984 | .proc_handler = proc_dointvec_minmax, |
985 | .extra1 = &zero, | |
82a1fcb9 IM |
986 | }, |
987 | { | |
82a1fcb9 IM |
988 | .procname = "hung_task_timeout_secs", |
989 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 990 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 991 | .mode = 0644, |
6d456111 | 992 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 993 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
994 | }, |
995 | { | |
82a1fcb9 IM |
996 | .procname = "hung_task_warnings", |
997 | .data = &sysctl_hung_task_warnings, | |
270750db | 998 | .maxlen = sizeof(int), |
82a1fcb9 | 999 | .mode = 0644, |
270750db AT |
1000 | .proc_handler = proc_dointvec_minmax, |
1001 | .extra1 = &neg_one, | |
82a1fcb9 | 1002 | }, |
c4f3b63f | 1003 | #endif |
bebfa101 AK |
1004 | #ifdef CONFIG_COMPAT |
1005 | { | |
bebfa101 AK |
1006 | .procname = "compat-log", |
1007 | .data = &compat_log, | |
1008 | .maxlen = sizeof (int), | |
1009 | .mode = 0644, | |
6d456111 | 1010 | .proc_handler = proc_dointvec, |
bebfa101 | 1011 | }, |
951f22d5 | 1012 | #endif |
23f78d4a IM |
1013 | #ifdef CONFIG_RT_MUTEXES |
1014 | { | |
23f78d4a IM |
1015 | .procname = "max_lock_depth", |
1016 | .data = &max_lock_depth, | |
1017 | .maxlen = sizeof(int), | |
1018 | .mode = 0644, | |
6d456111 | 1019 | .proc_handler = proc_dointvec, |
23f78d4a | 1020 | }, |
5096add8 | 1021 | #endif |
10a0a8d4 | 1022 | { |
10a0a8d4 JF |
1023 | .procname = "poweroff_cmd", |
1024 | .data = &poweroff_cmd, | |
1025 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1026 | .mode = 0644, | |
6d456111 | 1027 | .proc_handler = proc_dostring, |
10a0a8d4 | 1028 | }, |
0b77f5bf DH |
1029 | #ifdef CONFIG_KEYS |
1030 | { | |
0b77f5bf DH |
1031 | .procname = "keys", |
1032 | .mode = 0555, | |
1033 | .child = key_sysctls, | |
1034 | }, | |
1035 | #endif | |
31a72bce PM |
1036 | #ifdef CONFIG_RCU_TORTURE_TEST |
1037 | { | |
31a72bce PM |
1038 | .procname = "rcutorture_runnable", |
1039 | .data = &rcutorture_runnable, | |
1040 | .maxlen = sizeof(int), | |
1041 | .mode = 0644, | |
6d456111 | 1042 | .proc_handler = proc_dointvec, |
31a72bce PM |
1043 | }, |
1044 | #endif | |
cdd6c482 | 1045 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1046 | /* |
1047 | * User-space scripts rely on the existence of this file | |
1048 | * as a feature check for perf_events being enabled. | |
1049 | * | |
1050 | * So it's an ABI, do not remove! | |
1051 | */ | |
1ccd1549 | 1052 | { |
cdd6c482 IM |
1053 | .procname = "perf_event_paranoid", |
1054 | .data = &sysctl_perf_event_paranoid, | |
1055 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1056 | .mode = 0644, |
6d456111 | 1057 | .proc_handler = proc_dointvec, |
1ccd1549 | 1058 | }, |
c5078f78 | 1059 | { |
cdd6c482 IM |
1060 | .procname = "perf_event_mlock_kb", |
1061 | .data = &sysctl_perf_event_mlock, | |
1062 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1063 | .mode = 0644, |
6d456111 | 1064 | .proc_handler = proc_dointvec, |
c5078f78 | 1065 | }, |
a78ac325 | 1066 | { |
cdd6c482 IM |
1067 | .procname = "perf_event_max_sample_rate", |
1068 | .data = &sysctl_perf_event_sample_rate, | |
1069 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1070 | .mode = 0644, |
163ec435 | 1071 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1072 | .extra1 = &one, |
a78ac325 | 1073 | }, |
14c63f17 DH |
1074 | { |
1075 | .procname = "perf_cpu_time_max_percent", | |
1076 | .data = &sysctl_perf_cpu_time_max_percent, | |
1077 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1078 | .mode = 0644, | |
1079 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1080 | .extra1 = &zero, | |
1081 | .extra2 = &one_hundred, | |
1082 | }, | |
1ccd1549 | 1083 | #endif |
dfec072e VN |
1084 | #ifdef CONFIG_KMEMCHECK |
1085 | { | |
dfec072e VN |
1086 | .procname = "kmemcheck", |
1087 | .data = &kmemcheck_enabled, | |
1088 | .maxlen = sizeof(int), | |
1089 | .mode = 0644, | |
6d456111 | 1090 | .proc_handler = proc_dointvec, |
dfec072e | 1091 | }, |
cb684b5b | 1092 | #endif |
6fce56ec | 1093 | { } |
1da177e4 LT |
1094 | }; |
1095 | ||
d8217f07 | 1096 | static struct ctl_table vm_table[] = { |
1da177e4 | 1097 | { |
1da177e4 LT |
1098 | .procname = "overcommit_memory", |
1099 | .data = &sysctl_overcommit_memory, | |
1100 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1101 | .mode = 0644, | |
cb16e95f PH |
1102 | .proc_handler = proc_dointvec_minmax, |
1103 | .extra1 = &zero, | |
1104 | .extra2 = &two, | |
1da177e4 | 1105 | }, |
fadd8fbd | 1106 | { |
fadd8fbd KH |
1107 | .procname = "panic_on_oom", |
1108 | .data = &sysctl_panic_on_oom, | |
1109 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1110 | .mode = 0644, | |
cb16e95f PH |
1111 | .proc_handler = proc_dointvec_minmax, |
1112 | .extra1 = &zero, | |
1113 | .extra2 = &two, | |
fadd8fbd | 1114 | }, |
fe071d7e | 1115 | { |
fe071d7e DR |
1116 | .procname = "oom_kill_allocating_task", |
1117 | .data = &sysctl_oom_kill_allocating_task, | |
1118 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1119 | .mode = 0644, | |
6d456111 | 1120 | .proc_handler = proc_dointvec, |
fe071d7e | 1121 | }, |
fef1bdd6 | 1122 | { |
fef1bdd6 DR |
1123 | .procname = "oom_dump_tasks", |
1124 | .data = &sysctl_oom_dump_tasks, | |
1125 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1126 | .mode = 0644, | |
6d456111 | 1127 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1128 | }, |
1da177e4 | 1129 | { |
1da177e4 LT |
1130 | .procname = "overcommit_ratio", |
1131 | .data = &sysctl_overcommit_ratio, | |
1132 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1133 | .mode = 0644, | |
49f0ce5f JM |
1134 | .proc_handler = overcommit_ratio_handler, |
1135 | }, | |
1136 | { | |
1137 | .procname = "overcommit_kbytes", | |
1138 | .data = &sysctl_overcommit_kbytes, | |
1139 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1140 | .mode = 0644, | |
1141 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1142 | }, |
1143 | { | |
1da177e4 LT |
1144 | .procname = "page-cluster", |
1145 | .data = &page_cluster, | |
1146 | .maxlen = sizeof(int), | |
1147 | .mode = 0644, | |
cb16e95f PH |
1148 | .proc_handler = proc_dointvec_minmax, |
1149 | .extra1 = &zero, | |
1da177e4 LT |
1150 | }, |
1151 | { | |
1da177e4 LT |
1152 | .procname = "dirty_background_ratio", |
1153 | .data = &dirty_background_ratio, | |
1154 | .maxlen = sizeof(dirty_background_ratio), | |
1155 | .mode = 0644, | |
6d456111 | 1156 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1157 | .extra1 = &zero, |
1158 | .extra2 = &one_hundred, | |
1159 | }, | |
2da02997 | 1160 | { |
2da02997 DR |
1161 | .procname = "dirty_background_bytes", |
1162 | .data = &dirty_background_bytes, | |
1163 | .maxlen = sizeof(dirty_background_bytes), | |
1164 | .mode = 0644, | |
6d456111 | 1165 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1166 | .extra1 = &one_ul, |
2da02997 | 1167 | }, |
1da177e4 | 1168 | { |
1da177e4 LT |
1169 | .procname = "dirty_ratio", |
1170 | .data = &vm_dirty_ratio, | |
1171 | .maxlen = sizeof(vm_dirty_ratio), | |
1172 | .mode = 0644, | |
6d456111 | 1173 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1174 | .extra1 = &zero, |
1175 | .extra2 = &one_hundred, | |
1176 | }, | |
2da02997 | 1177 | { |
2da02997 DR |
1178 | .procname = "dirty_bytes", |
1179 | .data = &vm_dirty_bytes, | |
1180 | .maxlen = sizeof(vm_dirty_bytes), | |
1181 | .mode = 0644, | |
6d456111 | 1182 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1183 | .extra1 = &dirty_bytes_min, |
2da02997 | 1184 | }, |
1da177e4 | 1185 | { |
1da177e4 | 1186 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1187 | .data = &dirty_writeback_interval, |
1188 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1189 | .mode = 0644, |
6d456111 | 1190 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1191 | }, |
1192 | { | |
1da177e4 | 1193 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1194 | .data = &dirty_expire_interval, |
1195 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1196 | .mode = 0644, |
cb16e95f PH |
1197 | .proc_handler = proc_dointvec_minmax, |
1198 | .extra1 = &zero, | |
1da177e4 LT |
1199 | }, |
1200 | { | |
3965c9ae WL |
1201 | .procname = "nr_pdflush_threads", |
1202 | .mode = 0444 /* read-only */, | |
1203 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1204 | }, |
1205 | { | |
1da177e4 LT |
1206 | .procname = "swappiness", |
1207 | .data = &vm_swappiness, | |
1208 | .maxlen = sizeof(vm_swappiness), | |
1209 | .mode = 0644, | |
6d456111 | 1210 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1211 | .extra1 = &zero, |
1212 | .extra2 = &one_hundred, | |
1213 | }, | |
1214 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1215 | { |
1da177e4 | 1216 | .procname = "nr_hugepages", |
e5ff2159 | 1217 | .data = NULL, |
1da177e4 LT |
1218 | .maxlen = sizeof(unsigned long), |
1219 | .mode = 0644, | |
6d456111 | 1220 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1221 | .extra1 = (void *)&hugetlb_zero, |
1222 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1223 | }, |
1224 | #ifdef CONFIG_NUMA | |
1225 | { | |
1226 | .procname = "nr_hugepages_mempolicy", | |
1227 | .data = NULL, | |
1228 | .maxlen = sizeof(unsigned long), | |
1229 | .mode = 0644, | |
1230 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1231 | .extra1 = (void *)&hugetlb_zero, | |
1232 | .extra2 = (void *)&hugetlb_infinity, | |
1233 | }, | |
1234 | #endif | |
1da177e4 | 1235 | { |
1da177e4 LT |
1236 | .procname = "hugetlb_shm_group", |
1237 | .data = &sysctl_hugetlb_shm_group, | |
1238 | .maxlen = sizeof(gid_t), | |
1239 | .mode = 0644, | |
6d456111 | 1240 | .proc_handler = proc_dointvec, |
1da177e4 | 1241 | }, |
396faf03 | 1242 | { |
396faf03 MG |
1243 | .procname = "hugepages_treat_as_movable", |
1244 | .data = &hugepages_treat_as_movable, | |
1245 | .maxlen = sizeof(int), | |
1246 | .mode = 0644, | |
86cdb465 | 1247 | .proc_handler = proc_dointvec, |
396faf03 | 1248 | }, |
d1c3fb1f | 1249 | { |
d1c3fb1f | 1250 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1251 | .data = NULL, |
1252 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1253 | .mode = 0644, |
6d456111 | 1254 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1255 | .extra1 = (void *)&hugetlb_zero, |
1256 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1257 | }, |
1da177e4 LT |
1258 | #endif |
1259 | { | |
1da177e4 LT |
1260 | .procname = "lowmem_reserve_ratio", |
1261 | .data = &sysctl_lowmem_reserve_ratio, | |
1262 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1263 | .mode = 0644, | |
6d456111 | 1264 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1265 | }, |
9d0243bc | 1266 | { |
9d0243bc AM |
1267 | .procname = "drop_caches", |
1268 | .data = &sysctl_drop_caches, | |
1269 | .maxlen = sizeof(int), | |
1270 | .mode = 0644, | |
1271 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1272 | .extra1 = &one, |
5509a5d2 | 1273 | .extra2 = &four, |
9d0243bc | 1274 | }, |
76ab0f53 MG |
1275 | #ifdef CONFIG_COMPACTION |
1276 | { | |
1277 | .procname = "compact_memory", | |
1278 | .data = &sysctl_compact_memory, | |
1279 | .maxlen = sizeof(int), | |
1280 | .mode = 0200, | |
1281 | .proc_handler = sysctl_compaction_handler, | |
1282 | }, | |
5e771905 MG |
1283 | { |
1284 | .procname = "extfrag_threshold", | |
1285 | .data = &sysctl_extfrag_threshold, | |
1286 | .maxlen = sizeof(int), | |
1287 | .mode = 0644, | |
1288 | .proc_handler = sysctl_extfrag_handler, | |
1289 | .extra1 = &min_extfrag_threshold, | |
1290 | .extra2 = &max_extfrag_threshold, | |
1291 | }, | |
1292 | ||
76ab0f53 | 1293 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1294 | { |
1da177e4 LT |
1295 | .procname = "min_free_kbytes", |
1296 | .data = &min_free_kbytes, | |
1297 | .maxlen = sizeof(min_free_kbytes), | |
1298 | .mode = 0644, | |
6d456111 | 1299 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1300 | .extra1 = &zero, |
1301 | }, | |
8ad4b1fb | 1302 | { |
8ad4b1fb RS |
1303 | .procname = "percpu_pagelist_fraction", |
1304 | .data = &percpu_pagelist_fraction, | |
1305 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1306 | .mode = 0644, | |
6d456111 | 1307 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1308 | .extra1 = &min_percpu_pagelist_fract, |
1309 | }, | |
1da177e4 LT |
1310 | #ifdef CONFIG_MMU |
1311 | { | |
1da177e4 LT |
1312 | .procname = "max_map_count", |
1313 | .data = &sysctl_max_map_count, | |
1314 | .maxlen = sizeof(sysctl_max_map_count), | |
1315 | .mode = 0644, | |
3e26120c | 1316 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1317 | .extra1 = &zero, |
1da177e4 | 1318 | }, |
dd8632a1 PM |
1319 | #else |
1320 | { | |
dd8632a1 PM |
1321 | .procname = "nr_trim_pages", |
1322 | .data = &sysctl_nr_trim_pages, | |
1323 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1324 | .mode = 0644, | |
6d456111 | 1325 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1326 | .extra1 = &zero, |
1327 | }, | |
1da177e4 LT |
1328 | #endif |
1329 | { | |
1da177e4 LT |
1330 | .procname = "laptop_mode", |
1331 | .data = &laptop_mode, | |
1332 | .maxlen = sizeof(laptop_mode), | |
1333 | .mode = 0644, | |
6d456111 | 1334 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1335 | }, |
1336 | { | |
1da177e4 LT |
1337 | .procname = "block_dump", |
1338 | .data = &block_dump, | |
1339 | .maxlen = sizeof(block_dump), | |
1340 | .mode = 0644, | |
6d456111 | 1341 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1342 | .extra1 = &zero, |
1343 | }, | |
1344 | { | |
1da177e4 LT |
1345 | .procname = "vfs_cache_pressure", |
1346 | .data = &sysctl_vfs_cache_pressure, | |
1347 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1348 | .mode = 0644, | |
6d456111 | 1349 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1350 | .extra1 = &zero, |
1351 | }, | |
1352 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1353 | { | |
1da177e4 LT |
1354 | .procname = "legacy_va_layout", |
1355 | .data = &sysctl_legacy_va_layout, | |
1356 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1357 | .mode = 0644, | |
6d456111 | 1358 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1359 | .extra1 = &zero, |
1360 | }, | |
1361 | #endif | |
1743660b CL |
1362 | #ifdef CONFIG_NUMA |
1363 | { | |
1743660b CL |
1364 | .procname = "zone_reclaim_mode", |
1365 | .data = &zone_reclaim_mode, | |
1366 | .maxlen = sizeof(zone_reclaim_mode), | |
1367 | .mode = 0644, | |
6d456111 | 1368 | .proc_handler = proc_dointvec, |
c84db23c | 1369 | .extra1 = &zero, |
1743660b | 1370 | }, |
9614634f | 1371 | { |
9614634f CL |
1372 | .procname = "min_unmapped_ratio", |
1373 | .data = &sysctl_min_unmapped_ratio, | |
1374 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1375 | .mode = 0644, | |
6d456111 | 1376 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1377 | .extra1 = &zero, |
1378 | .extra2 = &one_hundred, | |
1379 | }, | |
0ff38490 | 1380 | { |
0ff38490 CL |
1381 | .procname = "min_slab_ratio", |
1382 | .data = &sysctl_min_slab_ratio, | |
1383 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1384 | .mode = 0644, | |
6d456111 | 1385 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1386 | .extra1 = &zero, |
1387 | .extra2 = &one_hundred, | |
1388 | }, | |
e6e5494c | 1389 | #endif |
77461ab3 CL |
1390 | #ifdef CONFIG_SMP |
1391 | { | |
77461ab3 CL |
1392 | .procname = "stat_interval", |
1393 | .data = &sysctl_stat_interval, | |
1394 | .maxlen = sizeof(sysctl_stat_interval), | |
1395 | .mode = 0644, | |
6d456111 | 1396 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1397 | }, |
1398 | #endif | |
6e141546 | 1399 | #ifdef CONFIG_MMU |
ed032189 | 1400 | { |
ed032189 | 1401 | .procname = "mmap_min_addr", |
788084ab EP |
1402 | .data = &dac_mmap_min_addr, |
1403 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1404 | .mode = 0644, |
6d456111 | 1405 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1406 | }, |
6e141546 | 1407 | #endif |
f0c0b2b8 KH |
1408 | #ifdef CONFIG_NUMA |
1409 | { | |
f0c0b2b8 KH |
1410 | .procname = "numa_zonelist_order", |
1411 | .data = &numa_zonelist_order, | |
1412 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1413 | .mode = 0644, | |
6d456111 | 1414 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1415 | }, |
1416 | #endif | |
2b8232ce | 1417 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1418 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1419 | { |
e6e5494c IM |
1420 | .procname = "vdso_enabled", |
1421 | .data = &vdso_enabled, | |
1422 | .maxlen = sizeof(vdso_enabled), | |
1423 | .mode = 0644, | |
6d456111 | 1424 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1425 | .extra1 = &zero, |
1426 | }, | |
1da177e4 | 1427 | #endif |
195cf453 BG |
1428 | #ifdef CONFIG_HIGHMEM |
1429 | { | |
195cf453 BG |
1430 | .procname = "highmem_is_dirtyable", |
1431 | .data = &vm_highmem_is_dirtyable, | |
1432 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1433 | .mode = 0644, | |
6d456111 | 1434 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1435 | .extra1 = &zero, |
1436 | .extra2 = &one, | |
1437 | }, | |
1438 | #endif | |
4be6f6bb | 1439 | { |
4be6f6bb PZ |
1440 | .procname = "scan_unevictable_pages", |
1441 | .data = &scan_unevictable_pages, | |
1442 | .maxlen = sizeof(scan_unevictable_pages), | |
1443 | .mode = 0644, | |
6d456111 | 1444 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1445 | }, |
6a46079c AK |
1446 | #ifdef CONFIG_MEMORY_FAILURE |
1447 | { | |
6a46079c AK |
1448 | .procname = "memory_failure_early_kill", |
1449 | .data = &sysctl_memory_failure_early_kill, | |
1450 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1451 | .mode = 0644, | |
6d456111 | 1452 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1453 | .extra1 = &zero, |
1454 | .extra2 = &one, | |
1455 | }, | |
1456 | { | |
6a46079c AK |
1457 | .procname = "memory_failure_recovery", |
1458 | .data = &sysctl_memory_failure_recovery, | |
1459 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1460 | .mode = 0644, | |
6d456111 | 1461 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1462 | .extra1 = &zero, |
1463 | .extra2 = &one, | |
1464 | }, | |
1465 | #endif | |
c9b1d098 AS |
1466 | { |
1467 | .procname = "user_reserve_kbytes", | |
1468 | .data = &sysctl_user_reserve_kbytes, | |
1469 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1470 | .mode = 0644, | |
1471 | .proc_handler = proc_doulongvec_minmax, | |
1472 | }, | |
4eeab4f5 AS |
1473 | { |
1474 | .procname = "admin_reserve_kbytes", | |
1475 | .data = &sysctl_admin_reserve_kbytes, | |
1476 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1477 | .mode = 0644, | |
1478 | .proc_handler = proc_doulongvec_minmax, | |
1479 | }, | |
6fce56ec | 1480 | { } |
1da177e4 LT |
1481 | }; |
1482 | ||
2abc26fc | 1483 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1484 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1485 | { } |
2abc26fc EB |
1486 | }; |
1487 | #endif | |
1488 | ||
d8217f07 | 1489 | static struct ctl_table fs_table[] = { |
1da177e4 | 1490 | { |
1da177e4 LT |
1491 | .procname = "inode-nr", |
1492 | .data = &inodes_stat, | |
3942c07c | 1493 | .maxlen = 2*sizeof(long), |
1da177e4 | 1494 | .mode = 0444, |
cffbc8aa | 1495 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1496 | }, |
1497 | { | |
1da177e4 LT |
1498 | .procname = "inode-state", |
1499 | .data = &inodes_stat, | |
3942c07c | 1500 | .maxlen = 7*sizeof(long), |
1da177e4 | 1501 | .mode = 0444, |
cffbc8aa | 1502 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1503 | }, |
1504 | { | |
1da177e4 LT |
1505 | .procname = "file-nr", |
1506 | .data = &files_stat, | |
518de9b3 | 1507 | .maxlen = sizeof(files_stat), |
1da177e4 | 1508 | .mode = 0444, |
6d456111 | 1509 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1510 | }, |
1511 | { | |
1da177e4 LT |
1512 | .procname = "file-max", |
1513 | .data = &files_stat.max_files, | |
518de9b3 | 1514 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1515 | .mode = 0644, |
518de9b3 | 1516 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1517 | }, |
9cfe015a | 1518 | { |
9cfe015a ED |
1519 | .procname = "nr_open", |
1520 | .data = &sysctl_nr_open, | |
1521 | .maxlen = sizeof(int), | |
1522 | .mode = 0644, | |
6d456111 | 1523 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1524 | .extra1 = &sysctl_nr_open_min, |
1525 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1526 | }, |
1da177e4 | 1527 | { |
1da177e4 LT |
1528 | .procname = "dentry-state", |
1529 | .data = &dentry_stat, | |
3942c07c | 1530 | .maxlen = 6*sizeof(long), |
1da177e4 | 1531 | .mode = 0444, |
312d3ca8 | 1532 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1533 | }, |
1534 | { | |
1da177e4 LT |
1535 | .procname = "overflowuid", |
1536 | .data = &fs_overflowuid, | |
1537 | .maxlen = sizeof(int), | |
1538 | .mode = 0644, | |
6d456111 | 1539 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1540 | .extra1 = &minolduid, |
1541 | .extra2 = &maxolduid, | |
1542 | }, | |
1543 | { | |
1da177e4 LT |
1544 | .procname = "overflowgid", |
1545 | .data = &fs_overflowgid, | |
1546 | .maxlen = sizeof(int), | |
1547 | .mode = 0644, | |
6d456111 | 1548 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1549 | .extra1 = &minolduid, |
1550 | .extra2 = &maxolduid, | |
1551 | }, | |
bfcd17a6 | 1552 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1553 | { |
1da177e4 LT |
1554 | .procname = "leases-enable", |
1555 | .data = &leases_enable, | |
1556 | .maxlen = sizeof(int), | |
1557 | .mode = 0644, | |
6d456111 | 1558 | .proc_handler = proc_dointvec, |
1da177e4 | 1559 | }, |
bfcd17a6 | 1560 | #endif |
1da177e4 LT |
1561 | #ifdef CONFIG_DNOTIFY |
1562 | { | |
1da177e4 LT |
1563 | .procname = "dir-notify-enable", |
1564 | .data = &dir_notify_enable, | |
1565 | .maxlen = sizeof(int), | |
1566 | .mode = 0644, | |
6d456111 | 1567 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1568 | }, |
1569 | #endif | |
1570 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1571 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1572 | { |
1da177e4 LT |
1573 | .procname = "lease-break-time", |
1574 | .data = &lease_break_time, | |
1575 | .maxlen = sizeof(int), | |
1576 | .mode = 0644, | |
6d456111 | 1577 | .proc_handler = proc_dointvec, |
1da177e4 | 1578 | }, |
bfcd17a6 | 1579 | #endif |
ebf3f09c | 1580 | #ifdef CONFIG_AIO |
1da177e4 | 1581 | { |
1da177e4 LT |
1582 | .procname = "aio-nr", |
1583 | .data = &aio_nr, | |
1584 | .maxlen = sizeof(aio_nr), | |
1585 | .mode = 0444, | |
6d456111 | 1586 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1587 | }, |
1588 | { | |
1da177e4 LT |
1589 | .procname = "aio-max-nr", |
1590 | .data = &aio_max_nr, | |
1591 | .maxlen = sizeof(aio_max_nr), | |
1592 | .mode = 0644, | |
6d456111 | 1593 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1594 | }, |
ebf3f09c | 1595 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1596 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1597 | { |
0399cb08 RL |
1598 | .procname = "inotify", |
1599 | .mode = 0555, | |
1600 | .child = inotify_table, | |
1601 | }, | |
1602 | #endif | |
7ef9964e DL |
1603 | #ifdef CONFIG_EPOLL |
1604 | { | |
1605 | .procname = "epoll", | |
1606 | .mode = 0555, | |
1607 | .child = epoll_table, | |
1608 | }, | |
1609 | #endif | |
1da177e4 | 1610 | #endif |
800179c9 KC |
1611 | { |
1612 | .procname = "protected_symlinks", | |
1613 | .data = &sysctl_protected_symlinks, | |
1614 | .maxlen = sizeof(int), | |
1615 | .mode = 0600, | |
1616 | .proc_handler = proc_dointvec_minmax, | |
1617 | .extra1 = &zero, | |
1618 | .extra2 = &one, | |
1619 | }, | |
1620 | { | |
1621 | .procname = "protected_hardlinks", | |
1622 | .data = &sysctl_protected_hardlinks, | |
1623 | .maxlen = sizeof(int), | |
1624 | .mode = 0600, | |
1625 | .proc_handler = proc_dointvec_minmax, | |
1626 | .extra1 = &zero, | |
1627 | .extra2 = &one, | |
1628 | }, | |
d6e71144 | 1629 | { |
d6e71144 AC |
1630 | .procname = "suid_dumpable", |
1631 | .data = &suid_dumpable, | |
1632 | .maxlen = sizeof(int), | |
1633 | .mode = 0644, | |
54b50199 | 1634 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1635 | .extra1 = &zero, |
1636 | .extra2 = &two, | |
d6e71144 | 1637 | }, |
2abc26fc EB |
1638 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1639 | { | |
2abc26fc EB |
1640 | .procname = "binfmt_misc", |
1641 | .mode = 0555, | |
1642 | .child = binfmt_misc_table, | |
1643 | }, | |
1644 | #endif | |
b492e95b | 1645 | { |
ff9da691 JA |
1646 | .procname = "pipe-max-size", |
1647 | .data = &pipe_max_size, | |
b492e95b JA |
1648 | .maxlen = sizeof(int), |
1649 | .mode = 0644, | |
ff9da691 JA |
1650 | .proc_handler = &pipe_proc_fn, |
1651 | .extra1 = &pipe_min_size, | |
b492e95b | 1652 | }, |
6fce56ec | 1653 | { } |
1da177e4 LT |
1654 | }; |
1655 | ||
d8217f07 | 1656 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1657 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1658 | { |
abd4f750 MAS |
1659 | .procname = "exception-trace", |
1660 | .data = &show_unhandled_signals, | |
1661 | .maxlen = sizeof(int), | |
1662 | .mode = 0644, | |
1663 | .proc_handler = proc_dointvec | |
1664 | }, | |
b2be84df MH |
1665 | #endif |
1666 | #if defined(CONFIG_OPTPROBES) | |
1667 | { | |
1668 | .procname = "kprobes-optimization", | |
1669 | .data = &sysctl_kprobes_optimization, | |
1670 | .maxlen = sizeof(int), | |
1671 | .mode = 0644, | |
1672 | .proc_handler = proc_kprobes_optimization_handler, | |
1673 | .extra1 = &zero, | |
1674 | .extra2 = &one, | |
1675 | }, | |
abd4f750 | 1676 | #endif |
6fce56ec | 1677 | { } |
1da177e4 LT |
1678 | }; |
1679 | ||
d8217f07 | 1680 | static struct ctl_table dev_table[] = { |
6fce56ec | 1681 | { } |
0eeca283 | 1682 | }; |
1da177e4 | 1683 | |
de4e83bd | 1684 | int __init sysctl_init(void) |
d912b0cc | 1685 | { |
fd4b616b SR |
1686 | struct ctl_table_header *hdr; |
1687 | ||
1688 | hdr = register_sysctl_table(sysctl_base_table); | |
1689 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1690 | return 0; |
1691 | } | |
1692 | ||
b89a8171 EB |
1693 | #endif /* CONFIG_SYSCTL */ |
1694 | ||
1da177e4 LT |
1695 | /* |
1696 | * /proc/sys support | |
1697 | */ | |
1698 | ||
b89a8171 | 1699 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1700 | |
b1ba4ddd | 1701 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 1702 | void __user *buffer, |
b1ba4ddd | 1703 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1704 | { |
1705 | size_t len; | |
1706 | char __user *p; | |
1707 | char c; | |
8d060877 ON |
1708 | |
1709 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1710 | *lenp = 0; |
1711 | return 0; | |
1712 | } | |
8d060877 | 1713 | |
1da177e4 LT |
1714 | if (write) { |
1715 | len = 0; | |
1716 | p = buffer; | |
1717 | while (len < *lenp) { | |
1718 | if (get_user(c, p++)) | |
1719 | return -EFAULT; | |
1720 | if (c == 0 || c == '\n') | |
1721 | break; | |
1722 | len++; | |
1723 | } | |
f5dd3d6f SV |
1724 | if (len >= maxlen) |
1725 | len = maxlen-1; | |
1726 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 1727 | return -EFAULT; |
f5dd3d6f | 1728 | ((char *) data)[len] = 0; |
1da177e4 LT |
1729 | *ppos += *lenp; |
1730 | } else { | |
f5dd3d6f SV |
1731 | len = strlen(data); |
1732 | if (len > maxlen) | |
1733 | len = maxlen; | |
8d060877 ON |
1734 | |
1735 | if (*ppos > len) { | |
1736 | *lenp = 0; | |
1737 | return 0; | |
1738 | } | |
1739 | ||
1740 | data += *ppos; | |
1741 | len -= *ppos; | |
1742 | ||
1da177e4 LT |
1743 | if (len > *lenp) |
1744 | len = *lenp; | |
1745 | if (len) | |
f5dd3d6f | 1746 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
1747 | return -EFAULT; |
1748 | if (len < *lenp) { | |
1749 | if(put_user('\n', ((char __user *) buffer) + len)) | |
1750 | return -EFAULT; | |
1751 | len++; | |
1752 | } | |
1753 | *lenp = len; | |
1754 | *ppos += len; | |
1755 | } | |
1756 | return 0; | |
1757 | } | |
1758 | ||
f5dd3d6f SV |
1759 | /** |
1760 | * proc_dostring - read a string sysctl | |
1761 | * @table: the sysctl table | |
1762 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1763 | * @buffer: the user buffer |
1764 | * @lenp: the size of the user buffer | |
1765 | * @ppos: file position | |
1766 | * | |
1767 | * Reads/writes a string from/to the user buffer. If the kernel | |
1768 | * buffer provided is not large enough to hold the string, the | |
1769 | * string is truncated. The copied string is %NULL-terminated. | |
1770 | * If the string is being read by the user process, it is copied | |
1771 | * and a newline '\n' is added. It is truncated if the buffer is | |
1772 | * not large enough. | |
1773 | * | |
1774 | * Returns 0 on success. | |
1775 | */ | |
8d65af78 | 1776 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1777 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1778 | { | |
8d65af78 | 1779 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
1780 | buffer, lenp, ppos); |
1781 | } | |
1782 | ||
00b7c339 AW |
1783 | static size_t proc_skip_spaces(char **buf) |
1784 | { | |
1785 | size_t ret; | |
1786 | char *tmp = skip_spaces(*buf); | |
1787 | ret = tmp - *buf; | |
1788 | *buf = tmp; | |
1789 | return ret; | |
1790 | } | |
1791 | ||
9f977fb7 OP |
1792 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1793 | { | |
1794 | while (*size) { | |
1795 | if (**buf != v) | |
1796 | break; | |
1797 | (*size)--; | |
1798 | (*buf)++; | |
1799 | } | |
1800 | } | |
1801 | ||
00b7c339 AW |
1802 | #define TMPBUFLEN 22 |
1803 | /** | |
0fc377bd | 1804 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1805 | * |
0fc377bd RD |
1806 | * @buf: a kernel buffer |
1807 | * @size: size of the kernel buffer | |
1808 | * @val: this is where the number will be stored | |
1809 | * @neg: set to %TRUE if number is negative | |
1810 | * @perm_tr: a vector which contains the allowed trailers | |
1811 | * @perm_tr_len: size of the perm_tr vector | |
1812 | * @tr: pointer to store the trailer character | |
00b7c339 | 1813 | * |
0fc377bd RD |
1814 | * In case of success %0 is returned and @buf and @size are updated with |
1815 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1816 | * character exists (size is non-zero after returning from this | |
1817 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1818 | */ |
1819 | static int proc_get_long(char **buf, size_t *size, | |
1820 | unsigned long *val, bool *neg, | |
1821 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1822 | { | |
1823 | int len; | |
1824 | char *p, tmp[TMPBUFLEN]; | |
1825 | ||
1826 | if (!*size) | |
1827 | return -EINVAL; | |
1828 | ||
1829 | len = *size; | |
1830 | if (len > TMPBUFLEN - 1) | |
1831 | len = TMPBUFLEN - 1; | |
1832 | ||
1833 | memcpy(tmp, *buf, len); | |
1834 | ||
1835 | tmp[len] = 0; | |
1836 | p = tmp; | |
1837 | if (*p == '-' && *size > 1) { | |
1838 | *neg = true; | |
1839 | p++; | |
1840 | } else | |
1841 | *neg = false; | |
1842 | if (!isdigit(*p)) | |
1843 | return -EINVAL; | |
1844 | ||
1845 | *val = simple_strtoul(p, &p, 0); | |
1846 | ||
1847 | len = p - tmp; | |
1848 | ||
1849 | /* We don't know if the next char is whitespace thus we may accept | |
1850 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
1851 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
1852 | if (len == TMPBUFLEN - 1) | |
1853 | return -EINVAL; | |
1854 | ||
1855 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
1856 | return -EINVAL; | |
1da177e4 | 1857 | |
00b7c339 AW |
1858 | if (tr && (len < *size)) |
1859 | *tr = *p; | |
1860 | ||
1861 | *buf += len; | |
1862 | *size -= len; | |
1863 | ||
1864 | return 0; | |
1865 | } | |
1866 | ||
1867 | /** | |
0fc377bd | 1868 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 1869 | * |
0fc377bd RD |
1870 | * @buf: the user buffer |
1871 | * @size: the size of the user buffer | |
1872 | * @val: the integer to be converted | |
1873 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 1874 | * |
0fc377bd RD |
1875 | * In case of success %0 is returned and @buf and @size are updated with |
1876 | * the amount of bytes written. | |
00b7c339 AW |
1877 | */ |
1878 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
1879 | bool neg) | |
1880 | { | |
1881 | int len; | |
1882 | char tmp[TMPBUFLEN], *p = tmp; | |
1883 | ||
1884 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
1885 | len = strlen(tmp); | |
1886 | if (len > *size) | |
1887 | len = *size; | |
1888 | if (copy_to_user(*buf, tmp, len)) | |
1889 | return -EFAULT; | |
1890 | *size -= len; | |
1891 | *buf += len; | |
1892 | return 0; | |
1893 | } | |
1894 | #undef TMPBUFLEN | |
1895 | ||
1896 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
1897 | { | |
1898 | if (*size) { | |
1899 | char __user **buffer = (char __user **)buf; | |
1900 | if (put_user(c, *buffer)) | |
1901 | return -EFAULT; | |
1902 | (*size)--, (*buffer)++; | |
1903 | *buf = *buffer; | |
1904 | } | |
1905 | return 0; | |
1906 | } | |
1da177e4 | 1907 | |
00b7c339 | 1908 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1909 | int *valp, |
1910 | int write, void *data) | |
1911 | { | |
1912 | if (write) { | |
1913 | *valp = *negp ? -*lvalp : *lvalp; | |
1914 | } else { | |
1915 | int val = *valp; | |
1916 | if (val < 0) { | |
00b7c339 | 1917 | *negp = true; |
1da177e4 LT |
1918 | *lvalp = (unsigned long)-val; |
1919 | } else { | |
00b7c339 | 1920 | *negp = false; |
1da177e4 LT |
1921 | *lvalp = (unsigned long)val; |
1922 | } | |
1923 | } | |
1924 | return 0; | |
1925 | } | |
1926 | ||
00b7c339 AW |
1927 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
1928 | ||
d8217f07 | 1929 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 1930 | int write, void __user *buffer, |
fcfbd547 | 1931 | size_t *lenp, loff_t *ppos, |
00b7c339 | 1932 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
1933 | int write, void *data), |
1934 | void *data) | |
1935 | { | |
00b7c339 AW |
1936 | int *i, vleft, first = 1, err = 0; |
1937 | unsigned long page = 0; | |
1938 | size_t left; | |
1939 | char *kbuf; | |
1da177e4 | 1940 | |
00b7c339 | 1941 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
1942 | *lenp = 0; |
1943 | return 0; | |
1944 | } | |
1945 | ||
fcfbd547 | 1946 | i = (int *) tbl_data; |
1da177e4 LT |
1947 | vleft = table->maxlen / sizeof(*i); |
1948 | left = *lenp; | |
1949 | ||
1950 | if (!conv) | |
1951 | conv = do_proc_dointvec_conv; | |
1952 | ||
00b7c339 AW |
1953 | if (write) { |
1954 | if (left > PAGE_SIZE - 1) | |
1955 | left = PAGE_SIZE - 1; | |
1956 | page = __get_free_page(GFP_TEMPORARY); | |
1957 | kbuf = (char *) page; | |
1958 | if (!kbuf) | |
1959 | return -ENOMEM; | |
1960 | if (copy_from_user(kbuf, buffer, left)) { | |
1961 | err = -EFAULT; | |
1962 | goto free; | |
1963 | } | |
1964 | kbuf[left] = 0; | |
1965 | } | |
1966 | ||
1da177e4 | 1967 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
1968 | unsigned long lval; |
1969 | bool neg; | |
1da177e4 | 1970 | |
00b7c339 AW |
1971 | if (write) { |
1972 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 1973 | |
563b0467 O |
1974 | if (!left) |
1975 | break; | |
00b7c339 AW |
1976 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
1977 | proc_wspace_sep, | |
1978 | sizeof(proc_wspace_sep), NULL); | |
1979 | if (err) | |
1da177e4 | 1980 | break; |
00b7c339 AW |
1981 | if (conv(&neg, &lval, i, 1, data)) { |
1982 | err = -EINVAL; | |
1da177e4 | 1983 | break; |
00b7c339 | 1984 | } |
1da177e4 | 1985 | } else { |
00b7c339 AW |
1986 | if (conv(&neg, &lval, i, 0, data)) { |
1987 | err = -EINVAL; | |
1988 | break; | |
1989 | } | |
1da177e4 | 1990 | if (!first) |
00b7c339 AW |
1991 | err = proc_put_char(&buffer, &left, '\t'); |
1992 | if (err) | |
1993 | break; | |
1994 | err = proc_put_long(&buffer, &left, lval, neg); | |
1995 | if (err) | |
1da177e4 | 1996 | break; |
1da177e4 LT |
1997 | } |
1998 | } | |
1999 | ||
00b7c339 AW |
2000 | if (!write && !first && left && !err) |
2001 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2002 | if (write && !err && left) |
00b7c339 AW |
2003 | left -= proc_skip_spaces(&kbuf); |
2004 | free: | |
1da177e4 | 2005 | if (write) { |
00b7c339 AW |
2006 | free_page(page); |
2007 | if (first) | |
2008 | return err ? : -EINVAL; | |
1da177e4 | 2009 | } |
1da177e4 LT |
2010 | *lenp -= left; |
2011 | *ppos += *lenp; | |
00b7c339 | 2012 | return err; |
1da177e4 LT |
2013 | } |
2014 | ||
8d65af78 | 2015 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2016 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2017 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2018 | int write, void *data), |
2019 | void *data) | |
2020 | { | |
8d65af78 | 2021 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2022 | buffer, lenp, ppos, conv, data); |
2023 | } | |
2024 | ||
1da177e4 LT |
2025 | /** |
2026 | * proc_dointvec - read a vector of integers | |
2027 | * @table: the sysctl table | |
2028 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2029 | * @buffer: the user buffer |
2030 | * @lenp: the size of the user buffer | |
2031 | * @ppos: file position | |
2032 | * | |
2033 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2034 | * values from/to the user buffer, treated as an ASCII string. | |
2035 | * | |
2036 | * Returns 0 on success. | |
2037 | */ | |
8d65af78 | 2038 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2039 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2040 | { | |
8d65af78 | 2041 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2042 | NULL,NULL); |
2043 | } | |
2044 | ||
34f5a398 | 2045 | /* |
25ddbb18 AK |
2046 | * Taint values can only be increased |
2047 | * This means we can safely use a temporary. | |
34f5a398 | 2048 | */ |
8d65af78 | 2049 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2050 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2051 | { | |
25ddbb18 AK |
2052 | struct ctl_table t; |
2053 | unsigned long tmptaint = get_taint(); | |
2054 | int err; | |
34f5a398 | 2055 | |
91fcd412 | 2056 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2057 | return -EPERM; |
2058 | ||
25ddbb18 AK |
2059 | t = *table; |
2060 | t.data = &tmptaint; | |
8d65af78 | 2061 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2062 | if (err < 0) |
2063 | return err; | |
2064 | ||
2065 | if (write) { | |
2066 | /* | |
2067 | * Poor man's atomic or. Not worth adding a primitive | |
2068 | * to everyone's atomic.h for this | |
2069 | */ | |
2070 | int i; | |
2071 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2072 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2073 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2074 | } |
2075 | } | |
2076 | ||
2077 | return err; | |
34f5a398 TT |
2078 | } |
2079 | ||
bfdc0b49 | 2080 | #ifdef CONFIG_PRINTK |
620f6e8e | 2081 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2082 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2083 | { | |
2084 | if (write && !capable(CAP_SYS_ADMIN)) | |
2085 | return -EPERM; | |
2086 | ||
2087 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2088 | } | |
2089 | #endif | |
2090 | ||
1da177e4 LT |
2091 | struct do_proc_dointvec_minmax_conv_param { |
2092 | int *min; | |
2093 | int *max; | |
2094 | }; | |
2095 | ||
00b7c339 AW |
2096 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2097 | int *valp, | |
1da177e4 LT |
2098 | int write, void *data) |
2099 | { | |
2100 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2101 | if (write) { | |
2102 | int val = *negp ? -*lvalp : *lvalp; | |
2103 | if ((param->min && *param->min > val) || | |
2104 | (param->max && *param->max < val)) | |
2105 | return -EINVAL; | |
2106 | *valp = val; | |
2107 | } else { | |
2108 | int val = *valp; | |
2109 | if (val < 0) { | |
00b7c339 | 2110 | *negp = true; |
1da177e4 LT |
2111 | *lvalp = (unsigned long)-val; |
2112 | } else { | |
00b7c339 | 2113 | *negp = false; |
1da177e4 LT |
2114 | *lvalp = (unsigned long)val; |
2115 | } | |
2116 | } | |
2117 | return 0; | |
2118 | } | |
2119 | ||
2120 | /** | |
2121 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2122 | * @table: the sysctl table | |
2123 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2124 | * @buffer: the user buffer |
2125 | * @lenp: the size of the user buffer | |
2126 | * @ppos: file position | |
2127 | * | |
2128 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2129 | * values from/to the user buffer, treated as an ASCII string. | |
2130 | * | |
2131 | * This routine will ensure the values are within the range specified by | |
2132 | * table->extra1 (min) and table->extra2 (max). | |
2133 | * | |
2134 | * Returns 0 on success. | |
2135 | */ | |
8d65af78 | 2136 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2137 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2138 | { | |
2139 | struct do_proc_dointvec_minmax_conv_param param = { | |
2140 | .min = (int *) table->extra1, | |
2141 | .max = (int *) table->extra2, | |
2142 | }; | |
8d65af78 | 2143 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2144 | do_proc_dointvec_minmax_conv, ¶m); |
2145 | } | |
2146 | ||
54b50199 KC |
2147 | static void validate_coredump_safety(void) |
2148 | { | |
046d662f | 2149 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2150 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 KC |
2151 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
2152 | printk(KERN_WARNING "Unsafe core_pattern used with "\ | |
2153 | "suid_dumpable=2. Pipe handler or fully qualified "\ | |
2154 | "core dump path required.\n"); | |
2155 | } | |
046d662f | 2156 | #endif |
54b50199 KC |
2157 | } |
2158 | ||
2159 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2160 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2161 | { | |
2162 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2163 | if (!error) | |
2164 | validate_coredump_safety(); | |
2165 | return error; | |
2166 | } | |
2167 | ||
046d662f | 2168 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2169 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2170 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2171 | { | |
2172 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2173 | if (!error) | |
2174 | validate_coredump_safety(); | |
2175 | return error; | |
2176 | } | |
046d662f | 2177 | #endif |
54b50199 | 2178 | |
d8217f07 | 2179 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2180 | void __user *buffer, |
2181 | size_t *lenp, loff_t *ppos, | |
2182 | unsigned long convmul, | |
2183 | unsigned long convdiv) | |
2184 | { | |
00b7c339 AW |
2185 | unsigned long *i, *min, *max; |
2186 | int vleft, first = 1, err = 0; | |
2187 | unsigned long page = 0; | |
2188 | size_t left; | |
2189 | char *kbuf; | |
2190 | ||
2191 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2192 | *lenp = 0; |
2193 | return 0; | |
2194 | } | |
00b7c339 | 2195 | |
fcfbd547 | 2196 | i = (unsigned long *) data; |
1da177e4 LT |
2197 | min = (unsigned long *) table->extra1; |
2198 | max = (unsigned long *) table->extra2; | |
2199 | vleft = table->maxlen / sizeof(unsigned long); | |
2200 | left = *lenp; | |
00b7c339 AW |
2201 | |
2202 | if (write) { | |
2203 | if (left > PAGE_SIZE - 1) | |
2204 | left = PAGE_SIZE - 1; | |
2205 | page = __get_free_page(GFP_TEMPORARY); | |
2206 | kbuf = (char *) page; | |
2207 | if (!kbuf) | |
2208 | return -ENOMEM; | |
2209 | if (copy_from_user(kbuf, buffer, left)) { | |
2210 | err = -EFAULT; | |
2211 | goto free; | |
2212 | } | |
2213 | kbuf[left] = 0; | |
2214 | } | |
2215 | ||
27b3d80a | 2216 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2217 | unsigned long val; |
2218 | ||
1da177e4 | 2219 | if (write) { |
00b7c339 AW |
2220 | bool neg; |
2221 | ||
2222 | left -= proc_skip_spaces(&kbuf); | |
2223 | ||
2224 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2225 | proc_wspace_sep, | |
2226 | sizeof(proc_wspace_sep), NULL); | |
2227 | if (err) | |
1da177e4 LT |
2228 | break; |
2229 | if (neg) | |
1da177e4 LT |
2230 | continue; |
2231 | if ((min && val < *min) || (max && val > *max)) | |
2232 | continue; | |
2233 | *i = val; | |
2234 | } else { | |
00b7c339 | 2235 | val = convdiv * (*i) / convmul; |
7833819d | 2236 | if (!first) { |
00b7c339 | 2237 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2238 | if (err) |
2239 | break; | |
2240 | } | |
00b7c339 AW |
2241 | err = proc_put_long(&buffer, &left, val, false); |
2242 | if (err) | |
2243 | break; | |
1da177e4 LT |
2244 | } |
2245 | } | |
2246 | ||
00b7c339 AW |
2247 | if (!write && !first && left && !err) |
2248 | err = proc_put_char(&buffer, &left, '\n'); | |
2249 | if (write && !err) | |
2250 | left -= proc_skip_spaces(&kbuf); | |
2251 | free: | |
1da177e4 | 2252 | if (write) { |
00b7c339 AW |
2253 | free_page(page); |
2254 | if (first) | |
2255 | return err ? : -EINVAL; | |
1da177e4 | 2256 | } |
1da177e4 LT |
2257 | *lenp -= left; |
2258 | *ppos += *lenp; | |
00b7c339 | 2259 | return err; |
1da177e4 LT |
2260 | } |
2261 | ||
d8217f07 | 2262 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2263 | void __user *buffer, |
2264 | size_t *lenp, loff_t *ppos, | |
2265 | unsigned long convmul, | |
2266 | unsigned long convdiv) | |
2267 | { | |
2268 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2269 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2270 | } |
2271 | ||
1da177e4 LT |
2272 | /** |
2273 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2274 | * @table: the sysctl table | |
2275 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2276 | * @buffer: the user buffer |
2277 | * @lenp: the size of the user buffer | |
2278 | * @ppos: file position | |
2279 | * | |
2280 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2281 | * values from/to the user buffer, treated as an ASCII string. | |
2282 | * | |
2283 | * This routine will ensure the values are within the range specified by | |
2284 | * table->extra1 (min) and table->extra2 (max). | |
2285 | * | |
2286 | * Returns 0 on success. | |
2287 | */ | |
8d65af78 | 2288 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2289 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2290 | { | |
8d65af78 | 2291 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2292 | } |
2293 | ||
2294 | /** | |
2295 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2296 | * @table: the sysctl table | |
2297 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2298 | * @buffer: the user buffer |
2299 | * @lenp: the size of the user buffer | |
2300 | * @ppos: file position | |
2301 | * | |
2302 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2303 | * values from/to the user buffer, treated as an ASCII string. The values | |
2304 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2305 | * | |
2306 | * This routine will ensure the values are within the range specified by | |
2307 | * table->extra1 (min) and table->extra2 (max). | |
2308 | * | |
2309 | * Returns 0 on success. | |
2310 | */ | |
d8217f07 | 2311 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2312 | void __user *buffer, |
2313 | size_t *lenp, loff_t *ppos) | |
2314 | { | |
8d65af78 | 2315 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2316 | lenp, ppos, HZ, 1000l); |
2317 | } | |
2318 | ||
2319 | ||
00b7c339 | 2320 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2321 | int *valp, |
2322 | int write, void *data) | |
2323 | { | |
2324 | if (write) { | |
cba9f33d BS |
2325 | if (*lvalp > LONG_MAX / HZ) |
2326 | return 1; | |
1da177e4 LT |
2327 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2328 | } else { | |
2329 | int val = *valp; | |
2330 | unsigned long lval; | |
2331 | if (val < 0) { | |
00b7c339 | 2332 | *negp = true; |
1da177e4 LT |
2333 | lval = (unsigned long)-val; |
2334 | } else { | |
00b7c339 | 2335 | *negp = false; |
1da177e4 LT |
2336 | lval = (unsigned long)val; |
2337 | } | |
2338 | *lvalp = lval / HZ; | |
2339 | } | |
2340 | return 0; | |
2341 | } | |
2342 | ||
00b7c339 | 2343 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2344 | int *valp, |
2345 | int write, void *data) | |
2346 | { | |
2347 | if (write) { | |
cba9f33d BS |
2348 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2349 | return 1; | |
1da177e4 LT |
2350 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2351 | } else { | |
2352 | int val = *valp; | |
2353 | unsigned long lval; | |
2354 | if (val < 0) { | |
00b7c339 | 2355 | *negp = true; |
1da177e4 LT |
2356 | lval = (unsigned long)-val; |
2357 | } else { | |
00b7c339 | 2358 | *negp = false; |
1da177e4 LT |
2359 | lval = (unsigned long)val; |
2360 | } | |
2361 | *lvalp = jiffies_to_clock_t(lval); | |
2362 | } | |
2363 | return 0; | |
2364 | } | |
2365 | ||
00b7c339 | 2366 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2367 | int *valp, |
2368 | int write, void *data) | |
2369 | { | |
2370 | if (write) { | |
d738ce8f FF |
2371 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2372 | ||
2373 | if (jif > INT_MAX) | |
2374 | return 1; | |
2375 | *valp = (int)jif; | |
1da177e4 LT |
2376 | } else { |
2377 | int val = *valp; | |
2378 | unsigned long lval; | |
2379 | if (val < 0) { | |
00b7c339 | 2380 | *negp = true; |
1da177e4 LT |
2381 | lval = (unsigned long)-val; |
2382 | } else { | |
00b7c339 | 2383 | *negp = false; |
1da177e4 LT |
2384 | lval = (unsigned long)val; |
2385 | } | |
2386 | *lvalp = jiffies_to_msecs(lval); | |
2387 | } | |
2388 | return 0; | |
2389 | } | |
2390 | ||
2391 | /** | |
2392 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2393 | * @table: the sysctl table | |
2394 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2395 | * @buffer: the user buffer |
2396 | * @lenp: the size of the user buffer | |
2397 | * @ppos: file position | |
2398 | * | |
2399 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2400 | * values from/to the user buffer, treated as an ASCII string. | |
2401 | * The values read are assumed to be in seconds, and are converted into | |
2402 | * jiffies. | |
2403 | * | |
2404 | * Returns 0 on success. | |
2405 | */ | |
8d65af78 | 2406 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2407 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2408 | { | |
8d65af78 | 2409 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2410 | do_proc_dointvec_jiffies_conv,NULL); |
2411 | } | |
2412 | ||
2413 | /** | |
2414 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2415 | * @table: the sysctl table | |
2416 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2417 | * @buffer: the user buffer |
2418 | * @lenp: the size of the user buffer | |
1e5d5331 | 2419 | * @ppos: pointer to the file position |
1da177e4 LT |
2420 | * |
2421 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2422 | * values from/to the user buffer, treated as an ASCII string. | |
2423 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2424 | * are converted into jiffies. | |
2425 | * | |
2426 | * Returns 0 on success. | |
2427 | */ | |
8d65af78 | 2428 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2429 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2430 | { | |
8d65af78 | 2431 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2432 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2433 | } | |
2434 | ||
2435 | /** | |
2436 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2437 | * @table: the sysctl table | |
2438 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2439 | * @buffer: the user buffer |
2440 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2441 | * @ppos: file position |
2442 | * @ppos: the current position in the file | |
1da177e4 LT |
2443 | * |
2444 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2445 | * values from/to the user buffer, treated as an ASCII string. | |
2446 | * The values read are assumed to be in 1/1000 seconds, and | |
2447 | * are converted into jiffies. | |
2448 | * | |
2449 | * Returns 0 on success. | |
2450 | */ | |
8d65af78 | 2451 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2452 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2453 | { | |
8d65af78 | 2454 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2455 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2456 | } | |
2457 | ||
8d65af78 | 2458 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2459 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2460 | { | |
2461 | struct pid *new_pid; | |
2462 | pid_t tmp; | |
2463 | int r; | |
2464 | ||
6c5f3e7b | 2465 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2466 | |
8d65af78 | 2467 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2468 | lenp, ppos, NULL, NULL); |
2469 | if (r || !write) | |
2470 | return r; | |
2471 | ||
2472 | new_pid = find_get_pid(tmp); | |
2473 | if (!new_pid) | |
2474 | return -ESRCH; | |
2475 | ||
2476 | put_pid(xchg(&cad_pid, new_pid)); | |
2477 | return 0; | |
2478 | } | |
2479 | ||
9f977fb7 OP |
2480 | /** |
2481 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2482 | * @table: the sysctl table | |
2483 | * @write: %TRUE if this is a write to the sysctl file | |
2484 | * @buffer: the user buffer | |
2485 | * @lenp: the size of the user buffer | |
2486 | * @ppos: file position | |
2487 | * | |
2488 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2489 | * in table->maxlen. | |
2490 | * | |
2491 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2492 | * large bitmaps may be represented in a compact manner. Writing into | |
2493 | * the file will clear the bitmap then update it with the given input. | |
2494 | * | |
2495 | * Returns 0 on success. | |
2496 | */ | |
2497 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2498 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2499 | { | |
2500 | int err = 0; | |
2501 | bool first = 1; | |
2502 | size_t left = *lenp; | |
2503 | unsigned long bitmap_len = table->maxlen; | |
2504 | unsigned long *bitmap = (unsigned long *) table->data; | |
2505 | unsigned long *tmp_bitmap = NULL; | |
2506 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2507 | ||
2508 | if (!bitmap_len || !left || (*ppos && !write)) { | |
2509 | *lenp = 0; | |
2510 | return 0; | |
2511 | } | |
2512 | ||
2513 | if (write) { | |
2514 | unsigned long page = 0; | |
2515 | char *kbuf; | |
2516 | ||
2517 | if (left > PAGE_SIZE - 1) | |
2518 | left = PAGE_SIZE - 1; | |
2519 | ||
2520 | page = __get_free_page(GFP_TEMPORARY); | |
2521 | kbuf = (char *) page; | |
2522 | if (!kbuf) | |
2523 | return -ENOMEM; | |
2524 | if (copy_from_user(kbuf, buffer, left)) { | |
2525 | free_page(page); | |
2526 | return -EFAULT; | |
2527 | } | |
2528 | kbuf[left] = 0; | |
2529 | ||
2530 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2531 | GFP_KERNEL); | |
2532 | if (!tmp_bitmap) { | |
2533 | free_page(page); | |
2534 | return -ENOMEM; | |
2535 | } | |
2536 | proc_skip_char(&kbuf, &left, '\n'); | |
2537 | while (!err && left) { | |
2538 | unsigned long val_a, val_b; | |
2539 | bool neg; | |
2540 | ||
2541 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2542 | sizeof(tr_a), &c); | |
2543 | if (err) | |
2544 | break; | |
2545 | if (val_a >= bitmap_len || neg) { | |
2546 | err = -EINVAL; | |
2547 | break; | |
2548 | } | |
2549 | ||
2550 | val_b = val_a; | |
2551 | if (left) { | |
2552 | kbuf++; | |
2553 | left--; | |
2554 | } | |
2555 | ||
2556 | if (c == '-') { | |
2557 | err = proc_get_long(&kbuf, &left, &val_b, | |
2558 | &neg, tr_b, sizeof(tr_b), | |
2559 | &c); | |
2560 | if (err) | |
2561 | break; | |
2562 | if (val_b >= bitmap_len || neg || | |
2563 | val_a > val_b) { | |
2564 | err = -EINVAL; | |
2565 | break; | |
2566 | } | |
2567 | if (left) { | |
2568 | kbuf++; | |
2569 | left--; | |
2570 | } | |
2571 | } | |
2572 | ||
5a04cca6 | 2573 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 OP |
2574 | first = 0; |
2575 | proc_skip_char(&kbuf, &left, '\n'); | |
2576 | } | |
2577 | free_page(page); | |
2578 | } else { | |
2579 | unsigned long bit_a, bit_b = 0; | |
2580 | ||
2581 | while (left) { | |
2582 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2583 | if (bit_a >= bitmap_len) | |
2584 | break; | |
2585 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2586 | bit_a + 1) - 1; | |
2587 | ||
2588 | if (!first) { | |
2589 | err = proc_put_char(&buffer, &left, ','); | |
2590 | if (err) | |
2591 | break; | |
2592 | } | |
2593 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2594 | if (err) | |
2595 | break; | |
2596 | if (bit_a != bit_b) { | |
2597 | err = proc_put_char(&buffer, &left, '-'); | |
2598 | if (err) | |
2599 | break; | |
2600 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2601 | if (err) | |
2602 | break; | |
2603 | } | |
2604 | ||
2605 | first = 0; bit_b++; | |
2606 | } | |
2607 | if (!err) | |
2608 | err = proc_put_char(&buffer, &left, '\n'); | |
2609 | } | |
2610 | ||
2611 | if (!err) { | |
2612 | if (write) { | |
2613 | if (*ppos) | |
2614 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2615 | else | |
5a04cca6 | 2616 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2617 | } |
2618 | kfree(tmp_bitmap); | |
2619 | *lenp -= left; | |
2620 | *ppos += *lenp; | |
2621 | return 0; | |
2622 | } else { | |
2623 | kfree(tmp_bitmap); | |
2624 | return err; | |
2625 | } | |
2626 | } | |
2627 | ||
55610500 | 2628 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2629 | |
8d65af78 | 2630 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2631 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2632 | { | |
2633 | return -ENOSYS; | |
2634 | } | |
2635 | ||
8d65af78 | 2636 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2637 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2638 | { |
2639 | return -ENOSYS; | |
2640 | } | |
2641 | ||
8d65af78 | 2642 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2643 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2644 | { | |
2645 | return -ENOSYS; | |
2646 | } | |
2647 | ||
8d65af78 | 2648 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2649 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2650 | { | |
2651 | return -ENOSYS; | |
2652 | } | |
2653 | ||
8d65af78 | 2654 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2655 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2656 | { | |
2657 | return -ENOSYS; | |
2658 | } | |
2659 | ||
8d65af78 | 2660 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2661 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2662 | { | |
2663 | return -ENOSYS; | |
2664 | } | |
2665 | ||
8d65af78 | 2666 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2667 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2668 | { | |
2669 | return -ENOSYS; | |
2670 | } | |
2671 | ||
d8217f07 | 2672 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2673 | void __user *buffer, |
2674 | size_t *lenp, loff_t *ppos) | |
2675 | { | |
2676 | return -ENOSYS; | |
2677 | } | |
2678 | ||
2679 | ||
55610500 | 2680 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2681 | |
1da177e4 LT |
2682 | /* |
2683 | * No sense putting this after each symbol definition, twice, | |
2684 | * exception granted :-) | |
2685 | */ | |
2686 | EXPORT_SYMBOL(proc_dointvec); | |
2687 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2688 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2689 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2690 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2691 | EXPORT_SYMBOL(proc_dostring); | |
2692 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2693 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |