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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/mm.h> | |
23 | #include <linux/swap.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/sysctl.h> | |
5a04cca6 | 26 | #include <linux/bitmap.h> |
d33ed52d | 27 | #include <linux/signal.h> |
455cd5ab | 28 | #include <linux/printk.h> |
1da177e4 | 29 | #include <linux/proc_fs.h> |
72c2d582 | 30 | #include <linux/security.h> |
1da177e4 | 31 | #include <linux/ctype.h> |
dfec072e | 32 | #include <linux/kmemcheck.h> |
fd4b616b | 33 | #include <linux/kmemleak.h> |
62239ac2 | 34 | #include <linux/fs.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | #include <linux/kernel.h> | |
0296b228 | 37 | #include <linux/kobject.h> |
20380731 | 38 | #include <linux/net.h> |
1da177e4 LT |
39 | #include <linux/sysrq.h> |
40 | #include <linux/highuid.h> | |
41 | #include <linux/writeback.h> | |
3fff4c42 | 42 | #include <linux/ratelimit.h> |
76ab0f53 | 43 | #include <linux/compaction.h> |
1da177e4 | 44 | #include <linux/hugetlb.h> |
1da177e4 | 45 | #include <linux/initrd.h> |
0b77f5bf | 46 | #include <linux/key.h> |
1da177e4 LT |
47 | #include <linux/times.h> |
48 | #include <linux/limits.h> | |
49 | #include <linux/dcache.h> | |
6e006701 | 50 | #include <linux/dnotify.h> |
1da177e4 | 51 | #include <linux/syscalls.h> |
c748e134 | 52 | #include <linux/vmstat.h> |
c255d844 PM |
53 | #include <linux/nfs_fs.h> |
54 | #include <linux/acpi.h> | |
10a0a8d4 | 55 | #include <linux/reboot.h> |
b0fc494f | 56 | #include <linux/ftrace.h> |
cdd6c482 | 57 | #include <linux/perf_event.h> |
b2be84df | 58 | #include <linux/kprobes.h> |
b492e95b | 59 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 60 | #include <linux/oom.h> |
17f60a7d | 61 | #include <linux/kmod.h> |
73efc039 | 62 | #include <linux/capability.h> |
40401530 | 63 | #include <linux/binfmts.h> |
cf4aebc2 | 64 | #include <linux/sched/sysctl.h> |
7984754b | 65 | #include <linux/kexec.h> |
1da177e4 LT |
66 | |
67 | #include <asm/uaccess.h> | |
68 | #include <asm/processor.h> | |
69 | ||
29cbc78b AK |
70 | #ifdef CONFIG_X86 |
71 | #include <asm/nmi.h> | |
0741f4d2 | 72 | #include <asm/stacktrace.h> |
6e7c4025 | 73 | #include <asm/io.h> |
29cbc78b | 74 | #endif |
d550bbd4 DH |
75 | #ifdef CONFIG_SPARC |
76 | #include <asm/setup.h> | |
77 | #endif | |
c55b7c3e DY |
78 | #ifdef CONFIG_BSD_PROCESS_ACCT |
79 | #include <linux/acct.h> | |
80 | #endif | |
4f0e056f DY |
81 | #ifdef CONFIG_RT_MUTEXES |
82 | #include <linux/rtmutex.h> | |
83 | #endif | |
2edf5e49 DY |
84 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
85 | #include <linux/lockdep.h> | |
86 | #endif | |
15485a46 DY |
87 | #ifdef CONFIG_CHR_DEV_SG |
88 | #include <scsi/sg.h> | |
89 | #endif | |
29cbc78b | 90 | |
58687acb | 91 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
92 | #include <linux/nmi.h> |
93 | #endif | |
94 | ||
7058cb02 | 95 | |
1da177e4 LT |
96 | #if defined(CONFIG_SYSCTL) |
97 | ||
98 | /* External variables not in a header file. */ | |
1da177e4 | 99 | extern int max_threads; |
d6e71144 | 100 | extern int suid_dumpable; |
046d662f AK |
101 | #ifdef CONFIG_COREDUMP |
102 | extern int core_uses_pid; | |
1da177e4 | 103 | extern char core_pattern[]; |
a293980c | 104 | extern unsigned int core_pipe_limit; |
046d662f | 105 | #endif |
1da177e4 | 106 | extern int pid_max; |
1da177e4 | 107 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 108 | extern int percpu_pagelist_fraction; |
bebfa101 | 109 | extern int compat_log; |
9745512c | 110 | extern int latencytop_enabled; |
eceea0b3 | 111 | extern int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
112 | #ifndef CONFIG_MMU |
113 | extern int sysctl_nr_trim_pages; | |
114 | #endif | |
1da177e4 | 115 | |
c4f3b63f | 116 | /* Constants used for minimum and maximum */ |
2508ce18 | 117 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
118 | static int sixty = 60; |
119 | #endif | |
120 | ||
270750db AT |
121 | static int __maybe_unused neg_one = -1; |
122 | ||
c4f3b63f | 123 | static int zero; |
cd5f9a4c LT |
124 | static int __maybe_unused one = 1; |
125 | static int __maybe_unused two = 2; | |
cb16e95f | 126 | static int __maybe_unused three = 3; |
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 | |
d14f1729 DY |
144 | #ifdef CONFIG_INOTIFY_USER |
145 | #include <linux/inotify.h> | |
146 | #endif | |
72c57ed5 | 147 | #ifdef CONFIG_SPARC |
1da177e4 LT |
148 | #endif |
149 | ||
0871420f DM |
150 | #ifdef CONFIG_SPARC64 |
151 | extern int sysctl_tsb_ratio; | |
152 | #endif | |
153 | ||
1da177e4 LT |
154 | #ifdef __hppa__ |
155 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
156 | #endif |
157 | ||
158 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
159 | extern int unaligned_enabled; |
160 | #endif | |
1da177e4 | 161 | |
d2b176ed | 162 | #ifdef CONFIG_IA64 |
88fc241f | 163 | extern int unaligned_dump_stack; |
d2b176ed JS |
164 | #endif |
165 | ||
b6fca725 VG |
166 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
167 | extern int no_unaligned_warning; | |
168 | #endif | |
169 | ||
d6f8ff73 | 170 | #ifdef CONFIG_PROC_SYSCTL |
8d65af78 | 171 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 172 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 173 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 174 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 175 | #endif |
9ec52099 | 176 | |
bfdc0b49 | 177 | #ifdef CONFIG_PRINTK |
620f6e8e | 178 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
179 | void __user *buffer, size_t *lenp, loff_t *ppos); |
180 | #endif | |
181 | ||
54b50199 KC |
182 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
183 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 184 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
185 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
186 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 187 | #endif |
54b50199 | 188 | |
97f5f0cd | 189 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 190 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 191 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd DT |
192 | |
193 | static int sysrq_sysctl_handler(ctl_table *table, int write, | |
194 | void __user *buffer, size_t *lenp, | |
195 | loff_t *ppos) | |
196 | { | |
197 | int error; | |
198 | ||
199 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
200 | if (error) | |
201 | return error; | |
202 | ||
203 | if (write) | |
204 | sysrq_toggle_support(__sysrq_enabled); | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | #endif | |
210 | ||
d8217f07 EB |
211 | static struct ctl_table kern_table[]; |
212 | static struct ctl_table vm_table[]; | |
213 | static struct ctl_table fs_table[]; | |
214 | static struct ctl_table debug_table[]; | |
215 | static struct ctl_table dev_table[]; | |
216 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
217 | #ifdef CONFIG_EPOLL |
218 | extern struct ctl_table epoll_table[]; | |
219 | #endif | |
1da177e4 LT |
220 | |
221 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
222 | int sysctl_legacy_va_layout; | |
223 | #endif | |
224 | ||
1da177e4 LT |
225 | /* The default sysctl tables: */ |
226 | ||
de4e83bd | 227 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 228 | { |
1da177e4 LT |
229 | .procname = "kernel", |
230 | .mode = 0555, | |
231 | .child = kern_table, | |
232 | }, | |
233 | { | |
1da177e4 LT |
234 | .procname = "vm", |
235 | .mode = 0555, | |
236 | .child = vm_table, | |
237 | }, | |
1da177e4 | 238 | { |
1da177e4 LT |
239 | .procname = "fs", |
240 | .mode = 0555, | |
241 | .child = fs_table, | |
242 | }, | |
243 | { | |
1da177e4 LT |
244 | .procname = "debug", |
245 | .mode = 0555, | |
246 | .child = debug_table, | |
247 | }, | |
248 | { | |
1da177e4 LT |
249 | .procname = "dev", |
250 | .mode = 0555, | |
251 | .child = dev_table, | |
252 | }, | |
6fce56ec | 253 | { } |
1da177e4 LT |
254 | }; |
255 | ||
77e54a1f | 256 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
257 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
258 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
259 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
260 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 261 | #ifdef CONFIG_SMP |
1983a922 CE |
262 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
263 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
264 | #endif /* CONFIG_SMP */ |
265 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 266 | |
5e771905 MG |
267 | #ifdef CONFIG_COMPACTION |
268 | static int min_extfrag_threshold; | |
269 | static int max_extfrag_threshold = 1000; | |
270 | #endif | |
271 | ||
d8217f07 | 272 | static struct ctl_table kern_table[] = { |
2bba22c5 | 273 | { |
2bba22c5 MG |
274 | .procname = "sched_child_runs_first", |
275 | .data = &sysctl_sched_child_runs_first, | |
276 | .maxlen = sizeof(unsigned int), | |
277 | .mode = 0644, | |
6d456111 | 278 | .proc_handler = proc_dointvec, |
2bba22c5 | 279 | }, |
77e54a1f IM |
280 | #ifdef CONFIG_SCHED_DEBUG |
281 | { | |
b2be5e96 PZ |
282 | .procname = "sched_min_granularity_ns", |
283 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
284 | .maxlen = sizeof(unsigned int), |
285 | .mode = 0644, | |
702a7c76 | 286 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
287 | .extra1 = &min_sched_granularity_ns, |
288 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 289 | }, |
21805085 | 290 | { |
21805085 PZ |
291 | .procname = "sched_latency_ns", |
292 | .data = &sysctl_sched_latency, | |
293 | .maxlen = sizeof(unsigned int), | |
294 | .mode = 0644, | |
702a7c76 | 295 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
296 | .extra1 = &min_sched_granularity_ns, |
297 | .extra2 = &max_sched_granularity_ns, | |
298 | }, | |
77e54a1f | 299 | { |
77e54a1f IM |
300 | .procname = "sched_wakeup_granularity_ns", |
301 | .data = &sysctl_sched_wakeup_granularity, | |
302 | .maxlen = sizeof(unsigned int), | |
303 | .mode = 0644, | |
702a7c76 | 304 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
305 | .extra1 = &min_wakeup_granularity_ns, |
306 | .extra2 = &max_wakeup_granularity_ns, | |
307 | }, | |
cbee9f88 | 308 | #ifdef CONFIG_SMP |
1983a922 | 309 | { |
1983a922 CE |
310 | .procname = "sched_tunable_scaling", |
311 | .data = &sysctl_sched_tunable_scaling, | |
312 | .maxlen = sizeof(enum sched_tunable_scaling), | |
313 | .mode = 0644, | |
702a7c76 | 314 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
315 | .extra1 = &min_sched_tunable_scaling, |
316 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 317 | }, |
da84d961 | 318 | { |
d00535db | 319 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
320 | .data = &sysctl_sched_migration_cost, |
321 | .maxlen = sizeof(unsigned int), | |
322 | .mode = 0644, | |
6d456111 | 323 | .proc_handler = proc_dointvec, |
da84d961 | 324 | }, |
b82d9fdd | 325 | { |
b82d9fdd PZ |
326 | .procname = "sched_nr_migrate", |
327 | .data = &sysctl_sched_nr_migrate, | |
328 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 329 | .mode = 0644, |
6d456111 | 330 | .proc_handler = proc_dointvec, |
fa85ae24 | 331 | }, |
e9e9250b | 332 | { |
d00535db | 333 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
334 | .data = &sysctl_sched_time_avg, |
335 | .maxlen = sizeof(unsigned int), | |
336 | .mode = 0644, | |
6d456111 | 337 | .proc_handler = proc_dointvec, |
e9e9250b | 338 | }, |
a7a4f8a7 | 339 | { |
d00535db | 340 | .procname = "sched_shares_window_ns", |
a7a4f8a7 PT |
341 | .data = &sysctl_sched_shares_window, |
342 | .maxlen = sizeof(unsigned int), | |
343 | .mode = 0644, | |
344 | .proc_handler = proc_dointvec, | |
345 | }, | |
cd1bb94b | 346 | { |
cd1bb94b AB |
347 | .procname = "timer_migration", |
348 | .data = &sysctl_timer_migration, | |
349 | .maxlen = sizeof(unsigned int), | |
350 | .mode = 0644, | |
6d456111 | 351 | .proc_handler = proc_dointvec_minmax, |
bfdb4d9f AB |
352 | .extra1 = &zero, |
353 | .extra2 = &one, | |
fa85ae24 | 354 | }, |
cbee9f88 PZ |
355 | #endif /* CONFIG_SMP */ |
356 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
357 | { |
358 | .procname = "numa_balancing_scan_delay_ms", | |
359 | .data = &sysctl_numa_balancing_scan_delay, | |
360 | .maxlen = sizeof(unsigned int), | |
361 | .mode = 0644, | |
362 | .proc_handler = proc_dointvec, | |
363 | }, | |
cbee9f88 PZ |
364 | { |
365 | .procname = "numa_balancing_scan_period_min_ms", | |
366 | .data = &sysctl_numa_balancing_scan_period_min, | |
367 | .maxlen = sizeof(unsigned int), | |
368 | .mode = 0644, | |
369 | .proc_handler = proc_dointvec, | |
370 | }, | |
371 | { | |
372 | .procname = "numa_balancing_scan_period_max_ms", | |
373 | .data = &sysctl_numa_balancing_scan_period_max, | |
374 | .maxlen = sizeof(unsigned int), | |
375 | .mode = 0644, | |
376 | .proc_handler = proc_dointvec, | |
377 | }, | |
6e5fb223 PZ |
378 | { |
379 | .procname = "numa_balancing_scan_size_mb", | |
380 | .data = &sysctl_numa_balancing_scan_size, | |
381 | .maxlen = sizeof(unsigned int), | |
382 | .mode = 0644, | |
383 | .proc_handler = proc_dointvec, | |
384 | }, | |
54a43d54 AK |
385 | { |
386 | .procname = "numa_balancing", | |
387 | .data = NULL, /* filled in by handler */ | |
388 | .maxlen = sizeof(unsigned int), | |
389 | .mode = 0644, | |
390 | .proc_handler = sysctl_numa_balancing, | |
391 | .extra1 = &zero, | |
392 | .extra2 = &one, | |
393 | }, | |
cbee9f88 PZ |
394 | #endif /* CONFIG_NUMA_BALANCING */ |
395 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 396 | { |
9f0c1e56 PZ |
397 | .procname = "sched_rt_period_us", |
398 | .data = &sysctl_sched_rt_period, | |
399 | .maxlen = sizeof(unsigned int), | |
400 | .mode = 0644, | |
6d456111 | 401 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
402 | }, |
403 | { | |
9f0c1e56 PZ |
404 | .procname = "sched_rt_runtime_us", |
405 | .data = &sysctl_sched_rt_runtime, | |
406 | .maxlen = sizeof(int), | |
407 | .mode = 0644, | |
6d456111 | 408 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 409 | }, |
ce0dbbbb CW |
410 | { |
411 | .procname = "sched_rr_timeslice_ms", | |
412 | .data = &sched_rr_timeslice, | |
413 | .maxlen = sizeof(int), | |
414 | .mode = 0644, | |
415 | .proc_handler = sched_rr_handler, | |
416 | }, | |
5091faa4 MG |
417 | #ifdef CONFIG_SCHED_AUTOGROUP |
418 | { | |
419 | .procname = "sched_autogroup_enabled", | |
420 | .data = &sysctl_sched_autogroup_enabled, | |
421 | .maxlen = sizeof(unsigned int), | |
422 | .mode = 0644, | |
1747b21f | 423 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
424 | .extra1 = &zero, |
425 | .extra2 = &one, | |
426 | }, | |
427 | #endif | |
ec12cb7f PT |
428 | #ifdef CONFIG_CFS_BANDWIDTH |
429 | { | |
430 | .procname = "sched_cfs_bandwidth_slice_us", | |
431 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
432 | .maxlen = sizeof(unsigned int), | |
433 | .mode = 0644, | |
434 | .proc_handler = proc_dointvec_minmax, | |
435 | .extra1 = &one, | |
436 | }, | |
437 | #endif | |
f20786ff PZ |
438 | #ifdef CONFIG_PROVE_LOCKING |
439 | { | |
f20786ff PZ |
440 | .procname = "prove_locking", |
441 | .data = &prove_locking, | |
442 | .maxlen = sizeof(int), | |
443 | .mode = 0644, | |
6d456111 | 444 | .proc_handler = proc_dointvec, |
f20786ff PZ |
445 | }, |
446 | #endif | |
447 | #ifdef CONFIG_LOCK_STAT | |
448 | { | |
f20786ff PZ |
449 | .procname = "lock_stat", |
450 | .data = &lock_stat, | |
451 | .maxlen = sizeof(int), | |
452 | .mode = 0644, | |
6d456111 | 453 | .proc_handler = proc_dointvec, |
f20786ff | 454 | }, |
77e54a1f | 455 | #endif |
1da177e4 | 456 | { |
1da177e4 LT |
457 | .procname = "panic", |
458 | .data = &panic_timeout, | |
459 | .maxlen = sizeof(int), | |
460 | .mode = 0644, | |
6d456111 | 461 | .proc_handler = proc_dointvec, |
1da177e4 | 462 | }, |
046d662f | 463 | #ifdef CONFIG_COREDUMP |
1da177e4 | 464 | { |
1da177e4 LT |
465 | .procname = "core_uses_pid", |
466 | .data = &core_uses_pid, | |
467 | .maxlen = sizeof(int), | |
468 | .mode = 0644, | |
6d456111 | 469 | .proc_handler = proc_dointvec, |
1da177e4 LT |
470 | }, |
471 | { | |
1da177e4 LT |
472 | .procname = "core_pattern", |
473 | .data = core_pattern, | |
71ce92f3 | 474 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 475 | .mode = 0644, |
54b50199 | 476 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 477 | }, |
a293980c | 478 | { |
a293980c NH |
479 | .procname = "core_pipe_limit", |
480 | .data = &core_pipe_limit, | |
481 | .maxlen = sizeof(unsigned int), | |
482 | .mode = 0644, | |
6d456111 | 483 | .proc_handler = proc_dointvec, |
a293980c | 484 | }, |
046d662f | 485 | #endif |
34f5a398 | 486 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 487 | { |
1da177e4 | 488 | .procname = "tainted", |
25ddbb18 | 489 | .maxlen = sizeof(long), |
34f5a398 | 490 | .mode = 0644, |
6d456111 | 491 | .proc_handler = proc_taint, |
1da177e4 | 492 | }, |
34f5a398 | 493 | #endif |
9745512c AV |
494 | #ifdef CONFIG_LATENCYTOP |
495 | { | |
496 | .procname = "latencytop", | |
497 | .data = &latencytop_enabled, | |
498 | .maxlen = sizeof(int), | |
499 | .mode = 0644, | |
6d456111 | 500 | .proc_handler = proc_dointvec, |
9745512c AV |
501 | }, |
502 | #endif | |
1da177e4 LT |
503 | #ifdef CONFIG_BLK_DEV_INITRD |
504 | { | |
1da177e4 LT |
505 | .procname = "real-root-dev", |
506 | .data = &real_root_dev, | |
507 | .maxlen = sizeof(int), | |
508 | .mode = 0644, | |
6d456111 | 509 | .proc_handler = proc_dointvec, |
1da177e4 LT |
510 | }, |
511 | #endif | |
45807a1d | 512 | { |
45807a1d IM |
513 | .procname = "print-fatal-signals", |
514 | .data = &print_fatal_signals, | |
515 | .maxlen = sizeof(int), | |
516 | .mode = 0644, | |
6d456111 | 517 | .proc_handler = proc_dointvec, |
45807a1d | 518 | }, |
72c57ed5 | 519 | #ifdef CONFIG_SPARC |
1da177e4 | 520 | { |
1da177e4 LT |
521 | .procname = "reboot-cmd", |
522 | .data = reboot_command, | |
523 | .maxlen = 256, | |
524 | .mode = 0644, | |
6d456111 | 525 | .proc_handler = proc_dostring, |
1da177e4 LT |
526 | }, |
527 | { | |
1da177e4 LT |
528 | .procname = "stop-a", |
529 | .data = &stop_a_enabled, | |
530 | .maxlen = sizeof (int), | |
531 | .mode = 0644, | |
6d456111 | 532 | .proc_handler = proc_dointvec, |
1da177e4 LT |
533 | }, |
534 | { | |
1da177e4 LT |
535 | .procname = "scons-poweroff", |
536 | .data = &scons_pwroff, | |
537 | .maxlen = sizeof (int), | |
538 | .mode = 0644, | |
6d456111 | 539 | .proc_handler = proc_dointvec, |
1da177e4 LT |
540 | }, |
541 | #endif | |
0871420f DM |
542 | #ifdef CONFIG_SPARC64 |
543 | { | |
0871420f DM |
544 | .procname = "tsb-ratio", |
545 | .data = &sysctl_tsb_ratio, | |
546 | .maxlen = sizeof (int), | |
547 | .mode = 0644, | |
6d456111 | 548 | .proc_handler = proc_dointvec, |
0871420f DM |
549 | }, |
550 | #endif | |
1da177e4 LT |
551 | #ifdef __hppa__ |
552 | { | |
1da177e4 LT |
553 | .procname = "soft-power", |
554 | .data = &pwrsw_enabled, | |
555 | .maxlen = sizeof (int), | |
556 | .mode = 0644, | |
6d456111 | 557 | .proc_handler = proc_dointvec, |
1da177e4 | 558 | }, |
bf14e3b9 VG |
559 | #endif |
560 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 561 | { |
1da177e4 LT |
562 | .procname = "unaligned-trap", |
563 | .data = &unaligned_enabled, | |
564 | .maxlen = sizeof (int), | |
565 | .mode = 0644, | |
6d456111 | 566 | .proc_handler = proc_dointvec, |
1da177e4 LT |
567 | }, |
568 | #endif | |
569 | { | |
1da177e4 LT |
570 | .procname = "ctrl-alt-del", |
571 | .data = &C_A_D, | |
572 | .maxlen = sizeof(int), | |
573 | .mode = 0644, | |
6d456111 | 574 | .proc_handler = proc_dointvec, |
1da177e4 | 575 | }, |
606576ce | 576 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 577 | { |
b0fc494f SR |
578 | .procname = "ftrace_enabled", |
579 | .data = &ftrace_enabled, | |
580 | .maxlen = sizeof(int), | |
581 | .mode = 0644, | |
6d456111 | 582 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
583 | }, |
584 | #endif | |
f38f1d2a SR |
585 | #ifdef CONFIG_STACK_TRACER |
586 | { | |
f38f1d2a SR |
587 | .procname = "stack_tracer_enabled", |
588 | .data = &stack_tracer_enabled, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
6d456111 | 591 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
592 | }, |
593 | #endif | |
944ac425 SR |
594 | #ifdef CONFIG_TRACING |
595 | { | |
3299b4dd | 596 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
597 | .data = &ftrace_dump_on_oops, |
598 | .maxlen = sizeof(int), | |
599 | .mode = 0644, | |
6d456111 | 600 | .proc_handler = proc_dointvec, |
944ac425 | 601 | }, |
de7edd31 SRRH |
602 | { |
603 | .procname = "traceoff_on_warning", | |
604 | .data = &__disable_trace_on_warning, | |
605 | .maxlen = sizeof(__disable_trace_on_warning), | |
606 | .mode = 0644, | |
607 | .proc_handler = proc_dointvec, | |
608 | }, | |
944ac425 | 609 | #endif |
7984754b KC |
610 | #ifdef CONFIG_KEXEC |
611 | { | |
612 | .procname = "kexec_load_disabled", | |
613 | .data = &kexec_load_disabled, | |
614 | .maxlen = sizeof(int), | |
615 | .mode = 0644, | |
616 | /* only handle a transition from default "0" to "1" */ | |
617 | .proc_handler = proc_dointvec_minmax, | |
618 | .extra1 = &one, | |
619 | .extra2 = &one, | |
620 | }, | |
621 | #endif | |
a1ef5adb | 622 | #ifdef CONFIG_MODULES |
1da177e4 | 623 | { |
1da177e4 LT |
624 | .procname = "modprobe", |
625 | .data = &modprobe_path, | |
626 | .maxlen = KMOD_PATH_LEN, | |
627 | .mode = 0644, | |
6d456111 | 628 | .proc_handler = proc_dostring, |
1da177e4 | 629 | }, |
3d43321b | 630 | { |
3d43321b KC |
631 | .procname = "modules_disabled", |
632 | .data = &modules_disabled, | |
633 | .maxlen = sizeof(int), | |
634 | .mode = 0644, | |
635 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 636 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
637 | .extra1 = &one, |
638 | .extra2 = &one, | |
639 | }, | |
1da177e4 | 640 | #endif |
3b572b50 | 641 | |
1da177e4 | 642 | { |
1da177e4 | 643 | .procname = "hotplug", |
312c004d KS |
644 | .data = &uevent_helper, |
645 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 646 | .mode = 0644, |
6d456111 | 647 | .proc_handler = proc_dostring, |
1da177e4 | 648 | }, |
3b572b50 | 649 | |
1da177e4 LT |
650 | #ifdef CONFIG_CHR_DEV_SG |
651 | { | |
1da177e4 LT |
652 | .procname = "sg-big-buff", |
653 | .data = &sg_big_buff, | |
654 | .maxlen = sizeof (int), | |
655 | .mode = 0444, | |
6d456111 | 656 | .proc_handler = proc_dointvec, |
1da177e4 LT |
657 | }, |
658 | #endif | |
659 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
660 | { | |
1da177e4 LT |
661 | .procname = "acct", |
662 | .data = &acct_parm, | |
663 | .maxlen = 3*sizeof(int), | |
664 | .mode = 0644, | |
6d456111 | 665 | .proc_handler = proc_dointvec, |
1da177e4 LT |
666 | }, |
667 | #endif | |
1da177e4 LT |
668 | #ifdef CONFIG_MAGIC_SYSRQ |
669 | { | |
1da177e4 | 670 | .procname = "sysrq", |
5d6f647f | 671 | .data = &__sysrq_enabled, |
1da177e4 LT |
672 | .maxlen = sizeof (int), |
673 | .mode = 0644, | |
97f5f0cd | 674 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
675 | }, |
676 | #endif | |
d6f8ff73 | 677 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 678 | { |
1da177e4 | 679 | .procname = "cad_pid", |
9ec52099 | 680 | .data = NULL, |
1da177e4 LT |
681 | .maxlen = sizeof (int), |
682 | .mode = 0600, | |
6d456111 | 683 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 684 | }, |
d6f8ff73 | 685 | #endif |
1da177e4 | 686 | { |
1da177e4 LT |
687 | .procname = "threads-max", |
688 | .data = &max_threads, | |
689 | .maxlen = sizeof(int), | |
690 | .mode = 0644, | |
6d456111 | 691 | .proc_handler = proc_dointvec, |
1da177e4 LT |
692 | }, |
693 | { | |
1da177e4 LT |
694 | .procname = "random", |
695 | .mode = 0555, | |
696 | .child = random_table, | |
697 | }, | |
17f60a7d EP |
698 | { |
699 | .procname = "usermodehelper", | |
700 | .mode = 0555, | |
701 | .child = usermodehelper_table, | |
702 | }, | |
1da177e4 | 703 | { |
1da177e4 LT |
704 | .procname = "overflowuid", |
705 | .data = &overflowuid, | |
706 | .maxlen = sizeof(int), | |
707 | .mode = 0644, | |
6d456111 | 708 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
709 | .extra1 = &minolduid, |
710 | .extra2 = &maxolduid, | |
711 | }, | |
712 | { | |
1da177e4 LT |
713 | .procname = "overflowgid", |
714 | .data = &overflowgid, | |
715 | .maxlen = sizeof(int), | |
716 | .mode = 0644, | |
6d456111 | 717 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
718 | .extra1 = &minolduid, |
719 | .extra2 = &maxolduid, | |
720 | }, | |
347a8dc3 | 721 | #ifdef CONFIG_S390 |
1da177e4 LT |
722 | #ifdef CONFIG_MATHEMU |
723 | { | |
1da177e4 LT |
724 | .procname = "ieee_emulation_warnings", |
725 | .data = &sysctl_ieee_emulation_warnings, | |
726 | .maxlen = sizeof(int), | |
727 | .mode = 0644, | |
6d456111 | 728 | .proc_handler = proc_dointvec, |
1da177e4 | 729 | }, |
1da177e4 LT |
730 | #endif |
731 | { | |
1da177e4 | 732 | .procname = "userprocess_debug", |
ab3c68ee | 733 | .data = &show_unhandled_signals, |
1da177e4 LT |
734 | .maxlen = sizeof(int), |
735 | .mode = 0644, | |
6d456111 | 736 | .proc_handler = proc_dointvec, |
1da177e4 LT |
737 | }, |
738 | #endif | |
739 | { | |
1da177e4 LT |
740 | .procname = "pid_max", |
741 | .data = &pid_max, | |
742 | .maxlen = sizeof (int), | |
743 | .mode = 0644, | |
6d456111 | 744 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
745 | .extra1 = &pid_max_min, |
746 | .extra2 = &pid_max_max, | |
747 | }, | |
748 | { | |
1da177e4 LT |
749 | .procname = "panic_on_oops", |
750 | .data = &panic_on_oops, | |
751 | .maxlen = sizeof(int), | |
752 | .mode = 0644, | |
6d456111 | 753 | .proc_handler = proc_dointvec, |
1da177e4 | 754 | }, |
7ef3d2fd JP |
755 | #if defined CONFIG_PRINTK |
756 | { | |
7ef3d2fd JP |
757 | .procname = "printk", |
758 | .data = &console_loglevel, | |
759 | .maxlen = 4*sizeof(int), | |
760 | .mode = 0644, | |
6d456111 | 761 | .proc_handler = proc_dointvec, |
7ef3d2fd | 762 | }, |
1da177e4 | 763 | { |
1da177e4 | 764 | .procname = "printk_ratelimit", |
717115e1 | 765 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
766 | .maxlen = sizeof(int), |
767 | .mode = 0644, | |
6d456111 | 768 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
769 | }, |
770 | { | |
1da177e4 | 771 | .procname = "printk_ratelimit_burst", |
717115e1 | 772 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
773 | .maxlen = sizeof(int), |
774 | .mode = 0644, | |
6d456111 | 775 | .proc_handler = proc_dointvec, |
1da177e4 | 776 | }, |
af91322e | 777 | { |
af91322e DY |
778 | .procname = "printk_delay", |
779 | .data = &printk_delay_msec, | |
780 | .maxlen = sizeof(int), | |
781 | .mode = 0644, | |
6d456111 | 782 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
783 | .extra1 = &zero, |
784 | .extra2 = &ten_thousand, | |
785 | }, | |
eaf06b24 DR |
786 | { |
787 | .procname = "dmesg_restrict", | |
788 | .data = &dmesg_restrict, | |
789 | .maxlen = sizeof(int), | |
790 | .mode = 0644, | |
620f6e8e | 791 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
792 | .extra1 = &zero, |
793 | .extra2 = &one, | |
794 | }, | |
455cd5ab DR |
795 | { |
796 | .procname = "kptr_restrict", | |
797 | .data = &kptr_restrict, | |
798 | .maxlen = sizeof(int), | |
799 | .mode = 0644, | |
620f6e8e | 800 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
801 | .extra1 = &zero, |
802 | .extra2 = &two, | |
803 | }, | |
df6e61d4 | 804 | #endif |
1da177e4 | 805 | { |
1da177e4 LT |
806 | .procname = "ngroups_max", |
807 | .data = &ngroups_max, | |
808 | .maxlen = sizeof (int), | |
809 | .mode = 0444, | |
6d456111 | 810 | .proc_handler = proc_dointvec, |
1da177e4 | 811 | }, |
73efc039 DB |
812 | { |
813 | .procname = "cap_last_cap", | |
814 | .data = (void *)&cap_last_cap, | |
815 | .maxlen = sizeof(int), | |
816 | .mode = 0444, | |
817 | .proc_handler = proc_dointvec, | |
818 | }, | |
58687acb | 819 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 820 | { |
58687acb | 821 | .procname = "watchdog", |
3c00ea82 | 822 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
823 | .maxlen = sizeof (int), |
824 | .mode = 0644, | |
586692a5 MSB |
825 | .proc_handler = proc_dowatchdog, |
826 | .extra1 = &zero, | |
827 | .extra2 = &one, | |
58687acb DZ |
828 | }, |
829 | { | |
830 | .procname = "watchdog_thresh", | |
586692a5 | 831 | .data = &watchdog_thresh, |
58687acb DZ |
832 | .maxlen = sizeof(int), |
833 | .mode = 0644, | |
586692a5 | 834 | .proc_handler = proc_dowatchdog, |
a6572f84 | 835 | .extra1 = &zero, |
58687acb | 836 | .extra2 = &sixty, |
504d7cf1 | 837 | }, |
2508ce18 DZ |
838 | { |
839 | .procname = "softlockup_panic", | |
840 | .data = &softlockup_panic, | |
841 | .maxlen = sizeof(int), | |
842 | .mode = 0644, | |
843 | .proc_handler = proc_dointvec_minmax, | |
844 | .extra1 = &zero, | |
845 | .extra2 = &one, | |
846 | }, | |
5dc30558 DZ |
847 | { |
848 | .procname = "nmi_watchdog", | |
3c00ea82 | 849 | .data = &watchdog_user_enabled, |
5dc30558 DZ |
850 | .maxlen = sizeof (int), |
851 | .mode = 0644, | |
586692a5 MSB |
852 | .proc_handler = proc_dowatchdog, |
853 | .extra1 = &zero, | |
854 | .extra2 = &one, | |
5dc30558 DZ |
855 | }, |
856 | #endif | |
857 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
858 | { | |
859 | .procname = "unknown_nmi_panic", | |
860 | .data = &unknown_nmi_panic, | |
861 | .maxlen = sizeof (int), | |
862 | .mode = 0644, | |
863 | .proc_handler = proc_dointvec, | |
864 | }, | |
504d7cf1 | 865 | #endif |
1da177e4 | 866 | #if defined(CONFIG_X86) |
8da5adda | 867 | { |
8da5adda DZ |
868 | .procname = "panic_on_unrecovered_nmi", |
869 | .data = &panic_on_unrecovered_nmi, | |
870 | .maxlen = sizeof(int), | |
871 | .mode = 0644, | |
6d456111 | 872 | .proc_handler = proc_dointvec, |
8da5adda | 873 | }, |
5211a242 | 874 | { |
5211a242 KG |
875 | .procname = "panic_on_io_nmi", |
876 | .data = &panic_on_io_nmi, | |
877 | .maxlen = sizeof(int), | |
878 | .mode = 0644, | |
6d456111 | 879 | .proc_handler = proc_dointvec, |
5211a242 | 880 | }, |
55af7796 MH |
881 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
882 | { | |
883 | .procname = "panic_on_stackoverflow", | |
884 | .data = &sysctl_panic_on_stackoverflow, | |
885 | .maxlen = sizeof(int), | |
886 | .mode = 0644, | |
887 | .proc_handler = proc_dointvec, | |
888 | }, | |
889 | #endif | |
1da177e4 | 890 | { |
1da177e4 LT |
891 | .procname = "bootloader_type", |
892 | .data = &bootloader_type, | |
893 | .maxlen = sizeof (int), | |
894 | .mode = 0444, | |
6d456111 | 895 | .proc_handler = proc_dointvec, |
1da177e4 | 896 | }, |
5031296c | 897 | { |
5031296c PA |
898 | .procname = "bootloader_version", |
899 | .data = &bootloader_version, | |
900 | .maxlen = sizeof (int), | |
901 | .mode = 0444, | |
6d456111 | 902 | .proc_handler = proc_dointvec, |
5031296c | 903 | }, |
0741f4d2 | 904 | { |
0741f4d2 CE |
905 | .procname = "kstack_depth_to_print", |
906 | .data = &kstack_depth_to_print, | |
907 | .maxlen = sizeof(int), | |
908 | .mode = 0644, | |
6d456111 | 909 | .proc_handler = proc_dointvec, |
0741f4d2 | 910 | }, |
6e7c4025 | 911 | { |
6e7c4025 IM |
912 | .procname = "io_delay_type", |
913 | .data = &io_delay_type, | |
914 | .maxlen = sizeof(int), | |
915 | .mode = 0644, | |
6d456111 | 916 | .proc_handler = proc_dointvec, |
6e7c4025 | 917 | }, |
1da177e4 | 918 | #endif |
7a9166e3 | 919 | #if defined(CONFIG_MMU) |
1da177e4 | 920 | { |
1da177e4 LT |
921 | .procname = "randomize_va_space", |
922 | .data = &randomize_va_space, | |
923 | .maxlen = sizeof(int), | |
924 | .mode = 0644, | |
6d456111 | 925 | .proc_handler = proc_dointvec, |
1da177e4 | 926 | }, |
7a9166e3 | 927 | #endif |
0152fb37 | 928 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 929 | { |
951f22d5 MS |
930 | .procname = "spin_retry", |
931 | .data = &spin_retry, | |
932 | .maxlen = sizeof (int), | |
933 | .mode = 0644, | |
6d456111 | 934 | .proc_handler = proc_dointvec, |
951f22d5 | 935 | }, |
c255d844 | 936 | #endif |
673d5b43 | 937 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 938 | { |
c255d844 | 939 | .procname = "acpi_video_flags", |
77afcf78 | 940 | .data = &acpi_realmode_flags, |
c255d844 PM |
941 | .maxlen = sizeof (unsigned long), |
942 | .mode = 0644, | |
6d456111 | 943 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 944 | }, |
d2b176ed | 945 | #endif |
b6fca725 | 946 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 947 | { |
d2b176ed JS |
948 | .procname = "ignore-unaligned-usertrap", |
949 | .data = &no_unaligned_warning, | |
950 | .maxlen = sizeof (int), | |
951 | .mode = 0644, | |
6d456111 | 952 | .proc_handler = proc_dointvec, |
d2b176ed | 953 | }, |
b6fca725 VG |
954 | #endif |
955 | #ifdef CONFIG_IA64 | |
88fc241f | 956 | { |
88fc241f DC |
957 | .procname = "unaligned-dump-stack", |
958 | .data = &unaligned_dump_stack, | |
959 | .maxlen = sizeof (int), | |
960 | .mode = 0644, | |
6d456111 | 961 | .proc_handler = proc_dointvec, |
88fc241f | 962 | }, |
bebfa101 | 963 | #endif |
e162b39a MSB |
964 | #ifdef CONFIG_DETECT_HUNG_TASK |
965 | { | |
e162b39a MSB |
966 | .procname = "hung_task_panic", |
967 | .data = &sysctl_hung_task_panic, | |
968 | .maxlen = sizeof(int), | |
969 | .mode = 0644, | |
6d456111 | 970 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
971 | .extra1 = &zero, |
972 | .extra2 = &one, | |
973 | }, | |
82a1fcb9 | 974 | { |
82a1fcb9 IM |
975 | .procname = "hung_task_check_count", |
976 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 977 | .maxlen = sizeof(int), |
82a1fcb9 | 978 | .mode = 0644, |
cd64647f LZ |
979 | .proc_handler = proc_dointvec_minmax, |
980 | .extra1 = &zero, | |
82a1fcb9 IM |
981 | }, |
982 | { | |
82a1fcb9 IM |
983 | .procname = "hung_task_timeout_secs", |
984 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 985 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 986 | .mode = 0644, |
6d456111 | 987 | .proc_handler = proc_dohung_task_timeout_secs, |
82a1fcb9 IM |
988 | }, |
989 | { | |
82a1fcb9 IM |
990 | .procname = "hung_task_warnings", |
991 | .data = &sysctl_hung_task_warnings, | |
270750db | 992 | .maxlen = sizeof(int), |
82a1fcb9 | 993 | .mode = 0644, |
270750db AT |
994 | .proc_handler = proc_dointvec_minmax, |
995 | .extra1 = &neg_one, | |
82a1fcb9 | 996 | }, |
c4f3b63f | 997 | #endif |
bebfa101 AK |
998 | #ifdef CONFIG_COMPAT |
999 | { | |
bebfa101 AK |
1000 | .procname = "compat-log", |
1001 | .data = &compat_log, | |
1002 | .maxlen = sizeof (int), | |
1003 | .mode = 0644, | |
6d456111 | 1004 | .proc_handler = proc_dointvec, |
bebfa101 | 1005 | }, |
951f22d5 | 1006 | #endif |
23f78d4a IM |
1007 | #ifdef CONFIG_RT_MUTEXES |
1008 | { | |
23f78d4a IM |
1009 | .procname = "max_lock_depth", |
1010 | .data = &max_lock_depth, | |
1011 | .maxlen = sizeof(int), | |
1012 | .mode = 0644, | |
6d456111 | 1013 | .proc_handler = proc_dointvec, |
23f78d4a | 1014 | }, |
5096add8 | 1015 | #endif |
10a0a8d4 | 1016 | { |
10a0a8d4 JF |
1017 | .procname = "poweroff_cmd", |
1018 | .data = &poweroff_cmd, | |
1019 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1020 | .mode = 0644, | |
6d456111 | 1021 | .proc_handler = proc_dostring, |
10a0a8d4 | 1022 | }, |
0b77f5bf DH |
1023 | #ifdef CONFIG_KEYS |
1024 | { | |
0b77f5bf DH |
1025 | .procname = "keys", |
1026 | .mode = 0555, | |
1027 | .child = key_sysctls, | |
1028 | }, | |
1029 | #endif | |
31a72bce PM |
1030 | #ifdef CONFIG_RCU_TORTURE_TEST |
1031 | { | |
31a72bce PM |
1032 | .procname = "rcutorture_runnable", |
1033 | .data = &rcutorture_runnable, | |
1034 | .maxlen = sizeof(int), | |
1035 | .mode = 0644, | |
6d456111 | 1036 | .proc_handler = proc_dointvec, |
31a72bce PM |
1037 | }, |
1038 | #endif | |
cdd6c482 | 1039 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1040 | /* |
1041 | * User-space scripts rely on the existence of this file | |
1042 | * as a feature check for perf_events being enabled. | |
1043 | * | |
1044 | * So it's an ABI, do not remove! | |
1045 | */ | |
1ccd1549 | 1046 | { |
cdd6c482 IM |
1047 | .procname = "perf_event_paranoid", |
1048 | .data = &sysctl_perf_event_paranoid, | |
1049 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1050 | .mode = 0644, |
6d456111 | 1051 | .proc_handler = proc_dointvec, |
1ccd1549 | 1052 | }, |
c5078f78 | 1053 | { |
cdd6c482 IM |
1054 | .procname = "perf_event_mlock_kb", |
1055 | .data = &sysctl_perf_event_mlock, | |
1056 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1057 | .mode = 0644, |
6d456111 | 1058 | .proc_handler = proc_dointvec, |
c5078f78 | 1059 | }, |
a78ac325 | 1060 | { |
cdd6c482 IM |
1061 | .procname = "perf_event_max_sample_rate", |
1062 | .data = &sysctl_perf_event_sample_rate, | |
1063 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1064 | .mode = 0644, |
163ec435 | 1065 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1066 | .extra1 = &one, |
a78ac325 | 1067 | }, |
14c63f17 DH |
1068 | { |
1069 | .procname = "perf_cpu_time_max_percent", | |
1070 | .data = &sysctl_perf_cpu_time_max_percent, | |
1071 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1072 | .mode = 0644, | |
1073 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1074 | .extra1 = &zero, | |
1075 | .extra2 = &one_hundred, | |
1076 | }, | |
1ccd1549 | 1077 | #endif |
dfec072e VN |
1078 | #ifdef CONFIG_KMEMCHECK |
1079 | { | |
dfec072e VN |
1080 | .procname = "kmemcheck", |
1081 | .data = &kmemcheck_enabled, | |
1082 | .maxlen = sizeof(int), | |
1083 | .mode = 0644, | |
6d456111 | 1084 | .proc_handler = proc_dointvec, |
dfec072e | 1085 | }, |
cb684b5b | 1086 | #endif |
6fce56ec | 1087 | { } |
1da177e4 LT |
1088 | }; |
1089 | ||
d8217f07 | 1090 | static struct ctl_table vm_table[] = { |
1da177e4 | 1091 | { |
1da177e4 LT |
1092 | .procname = "overcommit_memory", |
1093 | .data = &sysctl_overcommit_memory, | |
1094 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1095 | .mode = 0644, | |
cb16e95f PH |
1096 | .proc_handler = proc_dointvec_minmax, |
1097 | .extra1 = &zero, | |
1098 | .extra2 = &two, | |
1da177e4 | 1099 | }, |
fadd8fbd | 1100 | { |
fadd8fbd KH |
1101 | .procname = "panic_on_oom", |
1102 | .data = &sysctl_panic_on_oom, | |
1103 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1104 | .mode = 0644, | |
cb16e95f PH |
1105 | .proc_handler = proc_dointvec_minmax, |
1106 | .extra1 = &zero, | |
1107 | .extra2 = &two, | |
fadd8fbd | 1108 | }, |
fe071d7e | 1109 | { |
fe071d7e DR |
1110 | .procname = "oom_kill_allocating_task", |
1111 | .data = &sysctl_oom_kill_allocating_task, | |
1112 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1113 | .mode = 0644, | |
6d456111 | 1114 | .proc_handler = proc_dointvec, |
fe071d7e | 1115 | }, |
fef1bdd6 | 1116 | { |
fef1bdd6 DR |
1117 | .procname = "oom_dump_tasks", |
1118 | .data = &sysctl_oom_dump_tasks, | |
1119 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1120 | .mode = 0644, | |
6d456111 | 1121 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1122 | }, |
1da177e4 | 1123 | { |
1da177e4 LT |
1124 | .procname = "overcommit_ratio", |
1125 | .data = &sysctl_overcommit_ratio, | |
1126 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1127 | .mode = 0644, | |
49f0ce5f JM |
1128 | .proc_handler = overcommit_ratio_handler, |
1129 | }, | |
1130 | { | |
1131 | .procname = "overcommit_kbytes", | |
1132 | .data = &sysctl_overcommit_kbytes, | |
1133 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1134 | .mode = 0644, | |
1135 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1136 | }, |
1137 | { | |
1da177e4 LT |
1138 | .procname = "page-cluster", |
1139 | .data = &page_cluster, | |
1140 | .maxlen = sizeof(int), | |
1141 | .mode = 0644, | |
cb16e95f PH |
1142 | .proc_handler = proc_dointvec_minmax, |
1143 | .extra1 = &zero, | |
1da177e4 LT |
1144 | }, |
1145 | { | |
1da177e4 LT |
1146 | .procname = "dirty_background_ratio", |
1147 | .data = &dirty_background_ratio, | |
1148 | .maxlen = sizeof(dirty_background_ratio), | |
1149 | .mode = 0644, | |
6d456111 | 1150 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1151 | .extra1 = &zero, |
1152 | .extra2 = &one_hundred, | |
1153 | }, | |
2da02997 | 1154 | { |
2da02997 DR |
1155 | .procname = "dirty_background_bytes", |
1156 | .data = &dirty_background_bytes, | |
1157 | .maxlen = sizeof(dirty_background_bytes), | |
1158 | .mode = 0644, | |
6d456111 | 1159 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1160 | .extra1 = &one_ul, |
2da02997 | 1161 | }, |
1da177e4 | 1162 | { |
1da177e4 LT |
1163 | .procname = "dirty_ratio", |
1164 | .data = &vm_dirty_ratio, | |
1165 | .maxlen = sizeof(vm_dirty_ratio), | |
1166 | .mode = 0644, | |
6d456111 | 1167 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1168 | .extra1 = &zero, |
1169 | .extra2 = &one_hundred, | |
1170 | }, | |
2da02997 | 1171 | { |
2da02997 DR |
1172 | .procname = "dirty_bytes", |
1173 | .data = &vm_dirty_bytes, | |
1174 | .maxlen = sizeof(vm_dirty_bytes), | |
1175 | .mode = 0644, | |
6d456111 | 1176 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1177 | .extra1 = &dirty_bytes_min, |
2da02997 | 1178 | }, |
1da177e4 | 1179 | { |
1da177e4 | 1180 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1181 | .data = &dirty_writeback_interval, |
1182 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1183 | .mode = 0644, |
6d456111 | 1184 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1185 | }, |
1186 | { | |
1da177e4 | 1187 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1188 | .data = &dirty_expire_interval, |
1189 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1190 | .mode = 0644, |
cb16e95f PH |
1191 | .proc_handler = proc_dointvec_minmax, |
1192 | .extra1 = &zero, | |
1da177e4 LT |
1193 | }, |
1194 | { | |
3965c9ae WL |
1195 | .procname = "nr_pdflush_threads", |
1196 | .mode = 0444 /* read-only */, | |
1197 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1198 | }, |
1199 | { | |
1da177e4 LT |
1200 | .procname = "swappiness", |
1201 | .data = &vm_swappiness, | |
1202 | .maxlen = sizeof(vm_swappiness), | |
1203 | .mode = 0644, | |
6d456111 | 1204 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1205 | .extra1 = &zero, |
1206 | .extra2 = &one_hundred, | |
1207 | }, | |
1208 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1209 | { |
1da177e4 | 1210 | .procname = "nr_hugepages", |
e5ff2159 | 1211 | .data = NULL, |
1da177e4 LT |
1212 | .maxlen = sizeof(unsigned long), |
1213 | .mode = 0644, | |
6d456111 | 1214 | .proc_handler = hugetlb_sysctl_handler, |
1da177e4 LT |
1215 | .extra1 = (void *)&hugetlb_zero, |
1216 | .extra2 = (void *)&hugetlb_infinity, | |
06808b08 LS |
1217 | }, |
1218 | #ifdef CONFIG_NUMA | |
1219 | { | |
1220 | .procname = "nr_hugepages_mempolicy", | |
1221 | .data = NULL, | |
1222 | .maxlen = sizeof(unsigned long), | |
1223 | .mode = 0644, | |
1224 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
1225 | .extra1 = (void *)&hugetlb_zero, | |
1226 | .extra2 = (void *)&hugetlb_infinity, | |
1227 | }, | |
1228 | #endif | |
1da177e4 | 1229 | { |
1da177e4 LT |
1230 | .procname = "hugetlb_shm_group", |
1231 | .data = &sysctl_hugetlb_shm_group, | |
1232 | .maxlen = sizeof(gid_t), | |
1233 | .mode = 0644, | |
6d456111 | 1234 | .proc_handler = proc_dointvec, |
1da177e4 | 1235 | }, |
396faf03 | 1236 | { |
396faf03 MG |
1237 | .procname = "hugepages_treat_as_movable", |
1238 | .data = &hugepages_treat_as_movable, | |
1239 | .maxlen = sizeof(int), | |
1240 | .mode = 0644, | |
86cdb465 | 1241 | .proc_handler = proc_dointvec, |
396faf03 | 1242 | }, |
d1c3fb1f | 1243 | { |
d1c3fb1f | 1244 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1245 | .data = NULL, |
1246 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1247 | .mode = 0644, |
6d456111 | 1248 | .proc_handler = hugetlb_overcommit_handler, |
e5ff2159 AK |
1249 | .extra1 = (void *)&hugetlb_zero, |
1250 | .extra2 = (void *)&hugetlb_infinity, | |
d1c3fb1f | 1251 | }, |
1da177e4 LT |
1252 | #endif |
1253 | { | |
1da177e4 LT |
1254 | .procname = "lowmem_reserve_ratio", |
1255 | .data = &sysctl_lowmem_reserve_ratio, | |
1256 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1257 | .mode = 0644, | |
6d456111 | 1258 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1259 | }, |
9d0243bc | 1260 | { |
9d0243bc AM |
1261 | .procname = "drop_caches", |
1262 | .data = &sysctl_drop_caches, | |
1263 | .maxlen = sizeof(int), | |
1264 | .mode = 0644, | |
1265 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f PH |
1266 | .extra1 = &one, |
1267 | .extra2 = &three, | |
9d0243bc | 1268 | }, |
76ab0f53 MG |
1269 | #ifdef CONFIG_COMPACTION |
1270 | { | |
1271 | .procname = "compact_memory", | |
1272 | .data = &sysctl_compact_memory, | |
1273 | .maxlen = sizeof(int), | |
1274 | .mode = 0200, | |
1275 | .proc_handler = sysctl_compaction_handler, | |
1276 | }, | |
5e771905 MG |
1277 | { |
1278 | .procname = "extfrag_threshold", | |
1279 | .data = &sysctl_extfrag_threshold, | |
1280 | .maxlen = sizeof(int), | |
1281 | .mode = 0644, | |
1282 | .proc_handler = sysctl_extfrag_handler, | |
1283 | .extra1 = &min_extfrag_threshold, | |
1284 | .extra2 = &max_extfrag_threshold, | |
1285 | }, | |
1286 | ||
76ab0f53 | 1287 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1288 | { |
1da177e4 LT |
1289 | .procname = "min_free_kbytes", |
1290 | .data = &min_free_kbytes, | |
1291 | .maxlen = sizeof(min_free_kbytes), | |
1292 | .mode = 0644, | |
6d456111 | 1293 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1294 | .extra1 = &zero, |
1295 | }, | |
8ad4b1fb | 1296 | { |
8ad4b1fb RS |
1297 | .procname = "percpu_pagelist_fraction", |
1298 | .data = &percpu_pagelist_fraction, | |
1299 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1300 | .mode = 0644, | |
6d456111 | 1301 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
8ad4b1fb RS |
1302 | .extra1 = &min_percpu_pagelist_fract, |
1303 | }, | |
1da177e4 LT |
1304 | #ifdef CONFIG_MMU |
1305 | { | |
1da177e4 LT |
1306 | .procname = "max_map_count", |
1307 | .data = &sysctl_max_map_count, | |
1308 | .maxlen = sizeof(sysctl_max_map_count), | |
1309 | .mode = 0644, | |
3e26120c | 1310 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1311 | .extra1 = &zero, |
1da177e4 | 1312 | }, |
dd8632a1 PM |
1313 | #else |
1314 | { | |
dd8632a1 PM |
1315 | .procname = "nr_trim_pages", |
1316 | .data = &sysctl_nr_trim_pages, | |
1317 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1318 | .mode = 0644, | |
6d456111 | 1319 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1320 | .extra1 = &zero, |
1321 | }, | |
1da177e4 LT |
1322 | #endif |
1323 | { | |
1da177e4 LT |
1324 | .procname = "laptop_mode", |
1325 | .data = &laptop_mode, | |
1326 | .maxlen = sizeof(laptop_mode), | |
1327 | .mode = 0644, | |
6d456111 | 1328 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1329 | }, |
1330 | { | |
1da177e4 LT |
1331 | .procname = "block_dump", |
1332 | .data = &block_dump, | |
1333 | .maxlen = sizeof(block_dump), | |
1334 | .mode = 0644, | |
6d456111 | 1335 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1336 | .extra1 = &zero, |
1337 | }, | |
1338 | { | |
1da177e4 LT |
1339 | .procname = "vfs_cache_pressure", |
1340 | .data = &sysctl_vfs_cache_pressure, | |
1341 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1342 | .mode = 0644, | |
6d456111 | 1343 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1344 | .extra1 = &zero, |
1345 | }, | |
1346 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1347 | { | |
1da177e4 LT |
1348 | .procname = "legacy_va_layout", |
1349 | .data = &sysctl_legacy_va_layout, | |
1350 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1351 | .mode = 0644, | |
6d456111 | 1352 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1353 | .extra1 = &zero, |
1354 | }, | |
1355 | #endif | |
1743660b CL |
1356 | #ifdef CONFIG_NUMA |
1357 | { | |
1743660b CL |
1358 | .procname = "zone_reclaim_mode", |
1359 | .data = &zone_reclaim_mode, | |
1360 | .maxlen = sizeof(zone_reclaim_mode), | |
1361 | .mode = 0644, | |
6d456111 | 1362 | .proc_handler = proc_dointvec, |
c84db23c | 1363 | .extra1 = &zero, |
1743660b | 1364 | }, |
9614634f | 1365 | { |
9614634f CL |
1366 | .procname = "min_unmapped_ratio", |
1367 | .data = &sysctl_min_unmapped_ratio, | |
1368 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1369 | .mode = 0644, | |
6d456111 | 1370 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1371 | .extra1 = &zero, |
1372 | .extra2 = &one_hundred, | |
1373 | }, | |
0ff38490 | 1374 | { |
0ff38490 CL |
1375 | .procname = "min_slab_ratio", |
1376 | .data = &sysctl_min_slab_ratio, | |
1377 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1378 | .mode = 0644, | |
6d456111 | 1379 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1380 | .extra1 = &zero, |
1381 | .extra2 = &one_hundred, | |
1382 | }, | |
e6e5494c | 1383 | #endif |
77461ab3 CL |
1384 | #ifdef CONFIG_SMP |
1385 | { | |
77461ab3 CL |
1386 | .procname = "stat_interval", |
1387 | .data = &sysctl_stat_interval, | |
1388 | .maxlen = sizeof(sysctl_stat_interval), | |
1389 | .mode = 0644, | |
6d456111 | 1390 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 CL |
1391 | }, |
1392 | #endif | |
6e141546 | 1393 | #ifdef CONFIG_MMU |
ed032189 | 1394 | { |
ed032189 | 1395 | .procname = "mmap_min_addr", |
788084ab EP |
1396 | .data = &dac_mmap_min_addr, |
1397 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1398 | .mode = 0644, |
6d456111 | 1399 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1400 | }, |
6e141546 | 1401 | #endif |
f0c0b2b8 KH |
1402 | #ifdef CONFIG_NUMA |
1403 | { | |
f0c0b2b8 KH |
1404 | .procname = "numa_zonelist_order", |
1405 | .data = &numa_zonelist_order, | |
1406 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1407 | .mode = 0644, | |
6d456111 | 1408 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1409 | }, |
1410 | #endif | |
2b8232ce | 1411 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1412 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1413 | { |
e6e5494c IM |
1414 | .procname = "vdso_enabled", |
1415 | .data = &vdso_enabled, | |
1416 | .maxlen = sizeof(vdso_enabled), | |
1417 | .mode = 0644, | |
6d456111 | 1418 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1419 | .extra1 = &zero, |
1420 | }, | |
1da177e4 | 1421 | #endif |
195cf453 BG |
1422 | #ifdef CONFIG_HIGHMEM |
1423 | { | |
195cf453 BG |
1424 | .procname = "highmem_is_dirtyable", |
1425 | .data = &vm_highmem_is_dirtyable, | |
1426 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1427 | .mode = 0644, | |
6d456111 | 1428 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1429 | .extra1 = &zero, |
1430 | .extra2 = &one, | |
1431 | }, | |
1432 | #endif | |
4be6f6bb | 1433 | { |
4be6f6bb PZ |
1434 | .procname = "scan_unevictable_pages", |
1435 | .data = &scan_unevictable_pages, | |
1436 | .maxlen = sizeof(scan_unevictable_pages), | |
1437 | .mode = 0644, | |
6d456111 | 1438 | .proc_handler = scan_unevictable_handler, |
4be6f6bb | 1439 | }, |
6a46079c AK |
1440 | #ifdef CONFIG_MEMORY_FAILURE |
1441 | { | |
6a46079c AK |
1442 | .procname = "memory_failure_early_kill", |
1443 | .data = &sysctl_memory_failure_early_kill, | |
1444 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1445 | .mode = 0644, | |
6d456111 | 1446 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1447 | .extra1 = &zero, |
1448 | .extra2 = &one, | |
1449 | }, | |
1450 | { | |
6a46079c AK |
1451 | .procname = "memory_failure_recovery", |
1452 | .data = &sysctl_memory_failure_recovery, | |
1453 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1454 | .mode = 0644, | |
6d456111 | 1455 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1456 | .extra1 = &zero, |
1457 | .extra2 = &one, | |
1458 | }, | |
1459 | #endif | |
c9b1d098 AS |
1460 | { |
1461 | .procname = "user_reserve_kbytes", | |
1462 | .data = &sysctl_user_reserve_kbytes, | |
1463 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1464 | .mode = 0644, | |
1465 | .proc_handler = proc_doulongvec_minmax, | |
1466 | }, | |
4eeab4f5 AS |
1467 | { |
1468 | .procname = "admin_reserve_kbytes", | |
1469 | .data = &sysctl_admin_reserve_kbytes, | |
1470 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1471 | .mode = 0644, | |
1472 | .proc_handler = proc_doulongvec_minmax, | |
1473 | }, | |
6fce56ec | 1474 | { } |
1da177e4 LT |
1475 | }; |
1476 | ||
2abc26fc | 1477 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
d8217f07 | 1478 | static struct ctl_table binfmt_misc_table[] = { |
6fce56ec | 1479 | { } |
2abc26fc EB |
1480 | }; |
1481 | #endif | |
1482 | ||
d8217f07 | 1483 | static struct ctl_table fs_table[] = { |
1da177e4 | 1484 | { |
1da177e4 LT |
1485 | .procname = "inode-nr", |
1486 | .data = &inodes_stat, | |
3942c07c | 1487 | .maxlen = 2*sizeof(long), |
1da177e4 | 1488 | .mode = 0444, |
cffbc8aa | 1489 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1490 | }, |
1491 | { | |
1da177e4 LT |
1492 | .procname = "inode-state", |
1493 | .data = &inodes_stat, | |
3942c07c | 1494 | .maxlen = 7*sizeof(long), |
1da177e4 | 1495 | .mode = 0444, |
cffbc8aa | 1496 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1497 | }, |
1498 | { | |
1da177e4 LT |
1499 | .procname = "file-nr", |
1500 | .data = &files_stat, | |
518de9b3 | 1501 | .maxlen = sizeof(files_stat), |
1da177e4 | 1502 | .mode = 0444, |
6d456111 | 1503 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1504 | }, |
1505 | { | |
1da177e4 LT |
1506 | .procname = "file-max", |
1507 | .data = &files_stat.max_files, | |
518de9b3 | 1508 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1509 | .mode = 0644, |
518de9b3 | 1510 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1511 | }, |
9cfe015a | 1512 | { |
9cfe015a ED |
1513 | .procname = "nr_open", |
1514 | .data = &sysctl_nr_open, | |
1515 | .maxlen = sizeof(int), | |
1516 | .mode = 0644, | |
6d456111 | 1517 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1518 | .extra1 = &sysctl_nr_open_min, |
1519 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1520 | }, |
1da177e4 | 1521 | { |
1da177e4 LT |
1522 | .procname = "dentry-state", |
1523 | .data = &dentry_stat, | |
3942c07c | 1524 | .maxlen = 6*sizeof(long), |
1da177e4 | 1525 | .mode = 0444, |
312d3ca8 | 1526 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1527 | }, |
1528 | { | |
1da177e4 LT |
1529 | .procname = "overflowuid", |
1530 | .data = &fs_overflowuid, | |
1531 | .maxlen = sizeof(int), | |
1532 | .mode = 0644, | |
6d456111 | 1533 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1534 | .extra1 = &minolduid, |
1535 | .extra2 = &maxolduid, | |
1536 | }, | |
1537 | { | |
1da177e4 LT |
1538 | .procname = "overflowgid", |
1539 | .data = &fs_overflowgid, | |
1540 | .maxlen = sizeof(int), | |
1541 | .mode = 0644, | |
6d456111 | 1542 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1543 | .extra1 = &minolduid, |
1544 | .extra2 = &maxolduid, | |
1545 | }, | |
bfcd17a6 | 1546 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1547 | { |
1da177e4 LT |
1548 | .procname = "leases-enable", |
1549 | .data = &leases_enable, | |
1550 | .maxlen = sizeof(int), | |
1551 | .mode = 0644, | |
6d456111 | 1552 | .proc_handler = proc_dointvec, |
1da177e4 | 1553 | }, |
bfcd17a6 | 1554 | #endif |
1da177e4 LT |
1555 | #ifdef CONFIG_DNOTIFY |
1556 | { | |
1da177e4 LT |
1557 | .procname = "dir-notify-enable", |
1558 | .data = &dir_notify_enable, | |
1559 | .maxlen = sizeof(int), | |
1560 | .mode = 0644, | |
6d456111 | 1561 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1562 | }, |
1563 | #endif | |
1564 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1565 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1566 | { |
1da177e4 LT |
1567 | .procname = "lease-break-time", |
1568 | .data = &lease_break_time, | |
1569 | .maxlen = sizeof(int), | |
1570 | .mode = 0644, | |
6d456111 | 1571 | .proc_handler = proc_dointvec, |
1da177e4 | 1572 | }, |
bfcd17a6 | 1573 | #endif |
ebf3f09c | 1574 | #ifdef CONFIG_AIO |
1da177e4 | 1575 | { |
1da177e4 LT |
1576 | .procname = "aio-nr", |
1577 | .data = &aio_nr, | |
1578 | .maxlen = sizeof(aio_nr), | |
1579 | .mode = 0444, | |
6d456111 | 1580 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1581 | }, |
1582 | { | |
1da177e4 LT |
1583 | .procname = "aio-max-nr", |
1584 | .data = &aio_max_nr, | |
1585 | .maxlen = sizeof(aio_max_nr), | |
1586 | .mode = 0644, | |
6d456111 | 1587 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1588 | }, |
ebf3f09c | 1589 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1590 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1591 | { |
0399cb08 RL |
1592 | .procname = "inotify", |
1593 | .mode = 0555, | |
1594 | .child = inotify_table, | |
1595 | }, | |
1596 | #endif | |
7ef9964e DL |
1597 | #ifdef CONFIG_EPOLL |
1598 | { | |
1599 | .procname = "epoll", | |
1600 | .mode = 0555, | |
1601 | .child = epoll_table, | |
1602 | }, | |
1603 | #endif | |
1da177e4 | 1604 | #endif |
800179c9 KC |
1605 | { |
1606 | .procname = "protected_symlinks", | |
1607 | .data = &sysctl_protected_symlinks, | |
1608 | .maxlen = sizeof(int), | |
1609 | .mode = 0600, | |
1610 | .proc_handler = proc_dointvec_minmax, | |
1611 | .extra1 = &zero, | |
1612 | .extra2 = &one, | |
1613 | }, | |
1614 | { | |
1615 | .procname = "protected_hardlinks", | |
1616 | .data = &sysctl_protected_hardlinks, | |
1617 | .maxlen = sizeof(int), | |
1618 | .mode = 0600, | |
1619 | .proc_handler = proc_dointvec_minmax, | |
1620 | .extra1 = &zero, | |
1621 | .extra2 = &one, | |
1622 | }, | |
d6e71144 | 1623 | { |
d6e71144 AC |
1624 | .procname = "suid_dumpable", |
1625 | .data = &suid_dumpable, | |
1626 | .maxlen = sizeof(int), | |
1627 | .mode = 0644, | |
54b50199 | 1628 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1629 | .extra1 = &zero, |
1630 | .extra2 = &two, | |
d6e71144 | 1631 | }, |
2abc26fc EB |
1632 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1633 | { | |
2abc26fc EB |
1634 | .procname = "binfmt_misc", |
1635 | .mode = 0555, | |
1636 | .child = binfmt_misc_table, | |
1637 | }, | |
1638 | #endif | |
b492e95b | 1639 | { |
ff9da691 JA |
1640 | .procname = "pipe-max-size", |
1641 | .data = &pipe_max_size, | |
b492e95b JA |
1642 | .maxlen = sizeof(int), |
1643 | .mode = 0644, | |
ff9da691 JA |
1644 | .proc_handler = &pipe_proc_fn, |
1645 | .extra1 = &pipe_min_size, | |
b492e95b | 1646 | }, |
6fce56ec | 1647 | { } |
1da177e4 LT |
1648 | }; |
1649 | ||
d8217f07 | 1650 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1651 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1652 | { |
abd4f750 MAS |
1653 | .procname = "exception-trace", |
1654 | .data = &show_unhandled_signals, | |
1655 | .maxlen = sizeof(int), | |
1656 | .mode = 0644, | |
1657 | .proc_handler = proc_dointvec | |
1658 | }, | |
b2be84df MH |
1659 | #endif |
1660 | #if defined(CONFIG_OPTPROBES) | |
1661 | { | |
1662 | .procname = "kprobes-optimization", | |
1663 | .data = &sysctl_kprobes_optimization, | |
1664 | .maxlen = sizeof(int), | |
1665 | .mode = 0644, | |
1666 | .proc_handler = proc_kprobes_optimization_handler, | |
1667 | .extra1 = &zero, | |
1668 | .extra2 = &one, | |
1669 | }, | |
abd4f750 | 1670 | #endif |
6fce56ec | 1671 | { } |
1da177e4 LT |
1672 | }; |
1673 | ||
d8217f07 | 1674 | static struct ctl_table dev_table[] = { |
6fce56ec | 1675 | { } |
0eeca283 | 1676 | }; |
1da177e4 | 1677 | |
de4e83bd | 1678 | int __init sysctl_init(void) |
d912b0cc | 1679 | { |
fd4b616b SR |
1680 | struct ctl_table_header *hdr; |
1681 | ||
1682 | hdr = register_sysctl_table(sysctl_base_table); | |
1683 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1684 | return 0; |
1685 | } | |
1686 | ||
b89a8171 EB |
1687 | #endif /* CONFIG_SYSCTL */ |
1688 | ||
1da177e4 LT |
1689 | /* |
1690 | * /proc/sys support | |
1691 | */ | |
1692 | ||
b89a8171 | 1693 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1694 | |
b1ba4ddd | 1695 | static int _proc_do_string(void* data, int maxlen, int write, |
8d65af78 | 1696 | void __user *buffer, |
b1ba4ddd | 1697 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1698 | { |
1699 | size_t len; | |
1700 | char __user *p; | |
1701 | char c; | |
8d060877 ON |
1702 | |
1703 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1704 | *lenp = 0; |
1705 | return 0; | |
1706 | } | |
8d060877 | 1707 | |
1da177e4 LT |
1708 | if (write) { |
1709 | len = 0; | |
1710 | p = buffer; | |
1711 | while (len < *lenp) { | |
1712 | if (get_user(c, p++)) | |
1713 | return -EFAULT; | |
1714 | if (c == 0 || c == '\n') | |
1715 | break; | |
1716 | len++; | |
1717 | } | |
f5dd3d6f SV |
1718 | if (len >= maxlen) |
1719 | len = maxlen-1; | |
1720 | if(copy_from_user(data, buffer, len)) | |
1da177e4 | 1721 | return -EFAULT; |
f5dd3d6f | 1722 | ((char *) data)[len] = 0; |
1da177e4 LT |
1723 | *ppos += *lenp; |
1724 | } else { | |
f5dd3d6f SV |
1725 | len = strlen(data); |
1726 | if (len > maxlen) | |
1727 | len = maxlen; | |
8d060877 ON |
1728 | |
1729 | if (*ppos > len) { | |
1730 | *lenp = 0; | |
1731 | return 0; | |
1732 | } | |
1733 | ||
1734 | data += *ppos; | |
1735 | len -= *ppos; | |
1736 | ||
1da177e4 LT |
1737 | if (len > *lenp) |
1738 | len = *lenp; | |
1739 | if (len) | |
f5dd3d6f | 1740 | if(copy_to_user(buffer, data, len)) |
1da177e4 LT |
1741 | return -EFAULT; |
1742 | if (len < *lenp) { | |
1743 | if(put_user('\n', ((char __user *) buffer) + len)) | |
1744 | return -EFAULT; | |
1745 | len++; | |
1746 | } | |
1747 | *lenp = len; | |
1748 | *ppos += len; | |
1749 | } | |
1750 | return 0; | |
1751 | } | |
1752 | ||
f5dd3d6f SV |
1753 | /** |
1754 | * proc_dostring - read a string sysctl | |
1755 | * @table: the sysctl table | |
1756 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1757 | * @buffer: the user buffer |
1758 | * @lenp: the size of the user buffer | |
1759 | * @ppos: file position | |
1760 | * | |
1761 | * Reads/writes a string from/to the user buffer. If the kernel | |
1762 | * buffer provided is not large enough to hold the string, the | |
1763 | * string is truncated. The copied string is %NULL-terminated. | |
1764 | * If the string is being read by the user process, it is copied | |
1765 | * and a newline '\n' is added. It is truncated if the buffer is | |
1766 | * not large enough. | |
1767 | * | |
1768 | * Returns 0 on success. | |
1769 | */ | |
8d65af78 | 1770 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1771 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1772 | { | |
8d65af78 | 1773 | return _proc_do_string(table->data, table->maxlen, write, |
f5dd3d6f SV |
1774 | buffer, lenp, ppos); |
1775 | } | |
1776 | ||
00b7c339 AW |
1777 | static size_t proc_skip_spaces(char **buf) |
1778 | { | |
1779 | size_t ret; | |
1780 | char *tmp = skip_spaces(*buf); | |
1781 | ret = tmp - *buf; | |
1782 | *buf = tmp; | |
1783 | return ret; | |
1784 | } | |
1785 | ||
9f977fb7 OP |
1786 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1787 | { | |
1788 | while (*size) { | |
1789 | if (**buf != v) | |
1790 | break; | |
1791 | (*size)--; | |
1792 | (*buf)++; | |
1793 | } | |
1794 | } | |
1795 | ||
00b7c339 AW |
1796 | #define TMPBUFLEN 22 |
1797 | /** | |
0fc377bd | 1798 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1799 | * |
0fc377bd RD |
1800 | * @buf: a kernel buffer |
1801 | * @size: size of the kernel buffer | |
1802 | * @val: this is where the number will be stored | |
1803 | * @neg: set to %TRUE if number is negative | |
1804 | * @perm_tr: a vector which contains the allowed trailers | |
1805 | * @perm_tr_len: size of the perm_tr vector | |
1806 | * @tr: pointer to store the trailer character | |
00b7c339 | 1807 | * |
0fc377bd RD |
1808 | * In case of success %0 is returned and @buf and @size are updated with |
1809 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
1810 | * character exists (size is non-zero after returning from this | |
1811 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
1812 | */ |
1813 | static int proc_get_long(char **buf, size_t *size, | |
1814 | unsigned long *val, bool *neg, | |
1815 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
1816 | { | |
1817 | int len; | |
1818 | char *p, tmp[TMPBUFLEN]; | |
1819 | ||
1820 | if (!*size) | |
1821 | return -EINVAL; | |
1822 | ||
1823 | len = *size; | |
1824 | if (len > TMPBUFLEN - 1) | |
1825 | len = TMPBUFLEN - 1; | |
1826 | ||
1827 | memcpy(tmp, *buf, len); | |
1828 | ||
1829 | tmp[len] = 0; | |
1830 | p = tmp; | |
1831 | if (*p == '-' && *size > 1) { | |
1832 | *neg = true; | |
1833 | p++; | |
1834 | } else | |
1835 | *neg = false; | |
1836 | if (!isdigit(*p)) | |
1837 | return -EINVAL; | |
1838 | ||
1839 | *val = simple_strtoul(p, &p, 0); | |
1840 | ||
1841 | len = p - tmp; | |
1842 | ||
1843 | /* We don't know if the next char is whitespace thus we may accept | |
1844 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
1845 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
1846 | if (len == TMPBUFLEN - 1) | |
1847 | return -EINVAL; | |
1848 | ||
1849 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
1850 | return -EINVAL; | |
1da177e4 | 1851 | |
00b7c339 AW |
1852 | if (tr && (len < *size)) |
1853 | *tr = *p; | |
1854 | ||
1855 | *buf += len; | |
1856 | *size -= len; | |
1857 | ||
1858 | return 0; | |
1859 | } | |
1860 | ||
1861 | /** | |
0fc377bd | 1862 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 1863 | * |
0fc377bd RD |
1864 | * @buf: the user buffer |
1865 | * @size: the size of the user buffer | |
1866 | * @val: the integer to be converted | |
1867 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 1868 | * |
0fc377bd RD |
1869 | * In case of success %0 is returned and @buf and @size are updated with |
1870 | * the amount of bytes written. | |
00b7c339 AW |
1871 | */ |
1872 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
1873 | bool neg) | |
1874 | { | |
1875 | int len; | |
1876 | char tmp[TMPBUFLEN], *p = tmp; | |
1877 | ||
1878 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
1879 | len = strlen(tmp); | |
1880 | if (len > *size) | |
1881 | len = *size; | |
1882 | if (copy_to_user(*buf, tmp, len)) | |
1883 | return -EFAULT; | |
1884 | *size -= len; | |
1885 | *buf += len; | |
1886 | return 0; | |
1887 | } | |
1888 | #undef TMPBUFLEN | |
1889 | ||
1890 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
1891 | { | |
1892 | if (*size) { | |
1893 | char __user **buffer = (char __user **)buf; | |
1894 | if (put_user(c, *buffer)) | |
1895 | return -EFAULT; | |
1896 | (*size)--, (*buffer)++; | |
1897 | *buf = *buffer; | |
1898 | } | |
1899 | return 0; | |
1900 | } | |
1da177e4 | 1901 | |
00b7c339 | 1902 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
1903 | int *valp, |
1904 | int write, void *data) | |
1905 | { | |
1906 | if (write) { | |
1907 | *valp = *negp ? -*lvalp : *lvalp; | |
1908 | } else { | |
1909 | int val = *valp; | |
1910 | if (val < 0) { | |
00b7c339 | 1911 | *negp = true; |
1da177e4 LT |
1912 | *lvalp = (unsigned long)-val; |
1913 | } else { | |
00b7c339 | 1914 | *negp = false; |
1da177e4 LT |
1915 | *lvalp = (unsigned long)val; |
1916 | } | |
1917 | } | |
1918 | return 0; | |
1919 | } | |
1920 | ||
00b7c339 AW |
1921 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
1922 | ||
d8217f07 | 1923 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 1924 | int write, void __user *buffer, |
fcfbd547 | 1925 | size_t *lenp, loff_t *ppos, |
00b7c339 | 1926 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
1927 | int write, void *data), |
1928 | void *data) | |
1929 | { | |
00b7c339 AW |
1930 | int *i, vleft, first = 1, err = 0; |
1931 | unsigned long page = 0; | |
1932 | size_t left; | |
1933 | char *kbuf; | |
1da177e4 | 1934 | |
00b7c339 | 1935 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
1936 | *lenp = 0; |
1937 | return 0; | |
1938 | } | |
1939 | ||
fcfbd547 | 1940 | i = (int *) tbl_data; |
1da177e4 LT |
1941 | vleft = table->maxlen / sizeof(*i); |
1942 | left = *lenp; | |
1943 | ||
1944 | if (!conv) | |
1945 | conv = do_proc_dointvec_conv; | |
1946 | ||
00b7c339 AW |
1947 | if (write) { |
1948 | if (left > PAGE_SIZE - 1) | |
1949 | left = PAGE_SIZE - 1; | |
1950 | page = __get_free_page(GFP_TEMPORARY); | |
1951 | kbuf = (char *) page; | |
1952 | if (!kbuf) | |
1953 | return -ENOMEM; | |
1954 | if (copy_from_user(kbuf, buffer, left)) { | |
1955 | err = -EFAULT; | |
1956 | goto free; | |
1957 | } | |
1958 | kbuf[left] = 0; | |
1959 | } | |
1960 | ||
1da177e4 | 1961 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
1962 | unsigned long lval; |
1963 | bool neg; | |
1da177e4 | 1964 | |
00b7c339 AW |
1965 | if (write) { |
1966 | left -= proc_skip_spaces(&kbuf); | |
1da177e4 | 1967 | |
563b0467 O |
1968 | if (!left) |
1969 | break; | |
00b7c339 AW |
1970 | err = proc_get_long(&kbuf, &left, &lval, &neg, |
1971 | proc_wspace_sep, | |
1972 | sizeof(proc_wspace_sep), NULL); | |
1973 | if (err) | |
1da177e4 | 1974 | break; |
00b7c339 AW |
1975 | if (conv(&neg, &lval, i, 1, data)) { |
1976 | err = -EINVAL; | |
1da177e4 | 1977 | break; |
00b7c339 | 1978 | } |
1da177e4 | 1979 | } else { |
00b7c339 AW |
1980 | if (conv(&neg, &lval, i, 0, data)) { |
1981 | err = -EINVAL; | |
1982 | break; | |
1983 | } | |
1da177e4 | 1984 | if (!first) |
00b7c339 AW |
1985 | err = proc_put_char(&buffer, &left, '\t'); |
1986 | if (err) | |
1987 | break; | |
1988 | err = proc_put_long(&buffer, &left, lval, neg); | |
1989 | if (err) | |
1da177e4 | 1990 | break; |
1da177e4 LT |
1991 | } |
1992 | } | |
1993 | ||
00b7c339 AW |
1994 | if (!write && !first && left && !err) |
1995 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 1996 | if (write && !err && left) |
00b7c339 AW |
1997 | left -= proc_skip_spaces(&kbuf); |
1998 | free: | |
1da177e4 | 1999 | if (write) { |
00b7c339 AW |
2000 | free_page(page); |
2001 | if (first) | |
2002 | return err ? : -EINVAL; | |
1da177e4 | 2003 | } |
1da177e4 LT |
2004 | *lenp -= left; |
2005 | *ppos += *lenp; | |
00b7c339 | 2006 | return err; |
1da177e4 LT |
2007 | } |
2008 | ||
8d65af78 | 2009 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2010 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2011 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2012 | int write, void *data), |
2013 | void *data) | |
2014 | { | |
8d65af78 | 2015 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2016 | buffer, lenp, ppos, conv, data); |
2017 | } | |
2018 | ||
1da177e4 LT |
2019 | /** |
2020 | * proc_dointvec - read a vector of integers | |
2021 | * @table: the sysctl table | |
2022 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2023 | * @buffer: the user buffer |
2024 | * @lenp: the size of the user buffer | |
2025 | * @ppos: file position | |
2026 | * | |
2027 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2028 | * values from/to the user buffer, treated as an ASCII string. | |
2029 | * | |
2030 | * Returns 0 on success. | |
2031 | */ | |
8d65af78 | 2032 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2033 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2034 | { | |
8d65af78 | 2035 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2036 | NULL,NULL); |
2037 | } | |
2038 | ||
34f5a398 | 2039 | /* |
25ddbb18 AK |
2040 | * Taint values can only be increased |
2041 | * This means we can safely use a temporary. | |
34f5a398 | 2042 | */ |
8d65af78 | 2043 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2044 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2045 | { | |
25ddbb18 AK |
2046 | struct ctl_table t; |
2047 | unsigned long tmptaint = get_taint(); | |
2048 | int err; | |
34f5a398 | 2049 | |
91fcd412 | 2050 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2051 | return -EPERM; |
2052 | ||
25ddbb18 AK |
2053 | t = *table; |
2054 | t.data = &tmptaint; | |
8d65af78 | 2055 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2056 | if (err < 0) |
2057 | return err; | |
2058 | ||
2059 | if (write) { | |
2060 | /* | |
2061 | * Poor man's atomic or. Not worth adding a primitive | |
2062 | * to everyone's atomic.h for this | |
2063 | */ | |
2064 | int i; | |
2065 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2066 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2067 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2068 | } |
2069 | } | |
2070 | ||
2071 | return err; | |
34f5a398 TT |
2072 | } |
2073 | ||
bfdc0b49 | 2074 | #ifdef CONFIG_PRINTK |
620f6e8e | 2075 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2076 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2077 | { | |
2078 | if (write && !capable(CAP_SYS_ADMIN)) | |
2079 | return -EPERM; | |
2080 | ||
2081 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2082 | } | |
2083 | #endif | |
2084 | ||
1da177e4 LT |
2085 | struct do_proc_dointvec_minmax_conv_param { |
2086 | int *min; | |
2087 | int *max; | |
2088 | }; | |
2089 | ||
00b7c339 AW |
2090 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2091 | int *valp, | |
1da177e4 LT |
2092 | int write, void *data) |
2093 | { | |
2094 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2095 | if (write) { | |
2096 | int val = *negp ? -*lvalp : *lvalp; | |
2097 | if ((param->min && *param->min > val) || | |
2098 | (param->max && *param->max < val)) | |
2099 | return -EINVAL; | |
2100 | *valp = val; | |
2101 | } else { | |
2102 | int val = *valp; | |
2103 | if (val < 0) { | |
00b7c339 | 2104 | *negp = true; |
1da177e4 LT |
2105 | *lvalp = (unsigned long)-val; |
2106 | } else { | |
00b7c339 | 2107 | *negp = false; |
1da177e4 LT |
2108 | *lvalp = (unsigned long)val; |
2109 | } | |
2110 | } | |
2111 | return 0; | |
2112 | } | |
2113 | ||
2114 | /** | |
2115 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2116 | * @table: the sysctl table | |
2117 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2118 | * @buffer: the user buffer |
2119 | * @lenp: the size of the user buffer | |
2120 | * @ppos: file position | |
2121 | * | |
2122 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2123 | * values from/to the user buffer, treated as an ASCII string. | |
2124 | * | |
2125 | * This routine will ensure the values are within the range specified by | |
2126 | * table->extra1 (min) and table->extra2 (max). | |
2127 | * | |
2128 | * Returns 0 on success. | |
2129 | */ | |
8d65af78 | 2130 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2131 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2132 | { | |
2133 | struct do_proc_dointvec_minmax_conv_param param = { | |
2134 | .min = (int *) table->extra1, | |
2135 | .max = (int *) table->extra2, | |
2136 | }; | |
8d65af78 | 2137 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2138 | do_proc_dointvec_minmax_conv, ¶m); |
2139 | } | |
2140 | ||
54b50199 KC |
2141 | static void validate_coredump_safety(void) |
2142 | { | |
046d662f | 2143 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2144 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 KC |
2145 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
2146 | printk(KERN_WARNING "Unsafe core_pattern used with "\ | |
2147 | "suid_dumpable=2. Pipe handler or fully qualified "\ | |
2148 | "core dump path required.\n"); | |
2149 | } | |
046d662f | 2150 | #endif |
54b50199 KC |
2151 | } |
2152 | ||
2153 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2154 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2155 | { | |
2156 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2157 | if (!error) | |
2158 | validate_coredump_safety(); | |
2159 | return error; | |
2160 | } | |
2161 | ||
046d662f | 2162 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2163 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2164 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2165 | { | |
2166 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2167 | if (!error) | |
2168 | validate_coredump_safety(); | |
2169 | return error; | |
2170 | } | |
046d662f | 2171 | #endif |
54b50199 | 2172 | |
d8217f07 | 2173 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2174 | void __user *buffer, |
2175 | size_t *lenp, loff_t *ppos, | |
2176 | unsigned long convmul, | |
2177 | unsigned long convdiv) | |
2178 | { | |
00b7c339 AW |
2179 | unsigned long *i, *min, *max; |
2180 | int vleft, first = 1, err = 0; | |
2181 | unsigned long page = 0; | |
2182 | size_t left; | |
2183 | char *kbuf; | |
2184 | ||
2185 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2186 | *lenp = 0; |
2187 | return 0; | |
2188 | } | |
00b7c339 | 2189 | |
fcfbd547 | 2190 | i = (unsigned long *) data; |
1da177e4 LT |
2191 | min = (unsigned long *) table->extra1; |
2192 | max = (unsigned long *) table->extra2; | |
2193 | vleft = table->maxlen / sizeof(unsigned long); | |
2194 | left = *lenp; | |
00b7c339 AW |
2195 | |
2196 | if (write) { | |
2197 | if (left > PAGE_SIZE - 1) | |
2198 | left = PAGE_SIZE - 1; | |
2199 | page = __get_free_page(GFP_TEMPORARY); | |
2200 | kbuf = (char *) page; | |
2201 | if (!kbuf) | |
2202 | return -ENOMEM; | |
2203 | if (copy_from_user(kbuf, buffer, left)) { | |
2204 | err = -EFAULT; | |
2205 | goto free; | |
2206 | } | |
2207 | kbuf[left] = 0; | |
2208 | } | |
2209 | ||
27b3d80a | 2210 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2211 | unsigned long val; |
2212 | ||
1da177e4 | 2213 | if (write) { |
00b7c339 AW |
2214 | bool neg; |
2215 | ||
2216 | left -= proc_skip_spaces(&kbuf); | |
2217 | ||
2218 | err = proc_get_long(&kbuf, &left, &val, &neg, | |
2219 | proc_wspace_sep, | |
2220 | sizeof(proc_wspace_sep), NULL); | |
2221 | if (err) | |
1da177e4 LT |
2222 | break; |
2223 | if (neg) | |
1da177e4 LT |
2224 | continue; |
2225 | if ((min && val < *min) || (max && val > *max)) | |
2226 | continue; | |
2227 | *i = val; | |
2228 | } else { | |
00b7c339 | 2229 | val = convdiv * (*i) / convmul; |
7833819d | 2230 | if (!first) { |
00b7c339 | 2231 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2232 | if (err) |
2233 | break; | |
2234 | } | |
00b7c339 AW |
2235 | err = proc_put_long(&buffer, &left, val, false); |
2236 | if (err) | |
2237 | break; | |
1da177e4 LT |
2238 | } |
2239 | } | |
2240 | ||
00b7c339 AW |
2241 | if (!write && !first && left && !err) |
2242 | err = proc_put_char(&buffer, &left, '\n'); | |
2243 | if (write && !err) | |
2244 | left -= proc_skip_spaces(&kbuf); | |
2245 | free: | |
1da177e4 | 2246 | if (write) { |
00b7c339 AW |
2247 | free_page(page); |
2248 | if (first) | |
2249 | return err ? : -EINVAL; | |
1da177e4 | 2250 | } |
1da177e4 LT |
2251 | *lenp -= left; |
2252 | *ppos += *lenp; | |
00b7c339 | 2253 | return err; |
1da177e4 LT |
2254 | } |
2255 | ||
d8217f07 | 2256 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2257 | void __user *buffer, |
2258 | size_t *lenp, loff_t *ppos, | |
2259 | unsigned long convmul, | |
2260 | unsigned long convdiv) | |
2261 | { | |
2262 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2263 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2264 | } |
2265 | ||
1da177e4 LT |
2266 | /** |
2267 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2268 | * @table: the sysctl table | |
2269 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2270 | * @buffer: the user buffer |
2271 | * @lenp: the size of the user buffer | |
2272 | * @ppos: file position | |
2273 | * | |
2274 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2275 | * values from/to the user buffer, treated as an ASCII string. | |
2276 | * | |
2277 | * This routine will ensure the values are within the range specified by | |
2278 | * table->extra1 (min) and table->extra2 (max). | |
2279 | * | |
2280 | * Returns 0 on success. | |
2281 | */ | |
8d65af78 | 2282 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2283 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2284 | { | |
8d65af78 | 2285 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2286 | } |
2287 | ||
2288 | /** | |
2289 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2290 | * @table: the sysctl table | |
2291 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2292 | * @buffer: the user buffer |
2293 | * @lenp: the size of the user buffer | |
2294 | * @ppos: file position | |
2295 | * | |
2296 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2297 | * values from/to the user buffer, treated as an ASCII string. The values | |
2298 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2299 | * | |
2300 | * This routine will ensure the values are within the range specified by | |
2301 | * table->extra1 (min) and table->extra2 (max). | |
2302 | * | |
2303 | * Returns 0 on success. | |
2304 | */ | |
d8217f07 | 2305 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2306 | void __user *buffer, |
2307 | size_t *lenp, loff_t *ppos) | |
2308 | { | |
8d65af78 | 2309 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2310 | lenp, ppos, HZ, 1000l); |
2311 | } | |
2312 | ||
2313 | ||
00b7c339 | 2314 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2315 | int *valp, |
2316 | int write, void *data) | |
2317 | { | |
2318 | if (write) { | |
cba9f33d BS |
2319 | if (*lvalp > LONG_MAX / HZ) |
2320 | return 1; | |
1da177e4 LT |
2321 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2322 | } else { | |
2323 | int val = *valp; | |
2324 | unsigned long lval; | |
2325 | if (val < 0) { | |
00b7c339 | 2326 | *negp = true; |
1da177e4 LT |
2327 | lval = (unsigned long)-val; |
2328 | } else { | |
00b7c339 | 2329 | *negp = false; |
1da177e4 LT |
2330 | lval = (unsigned long)val; |
2331 | } | |
2332 | *lvalp = lval / HZ; | |
2333 | } | |
2334 | return 0; | |
2335 | } | |
2336 | ||
00b7c339 | 2337 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2338 | int *valp, |
2339 | int write, void *data) | |
2340 | { | |
2341 | if (write) { | |
cba9f33d BS |
2342 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2343 | return 1; | |
1da177e4 LT |
2344 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2345 | } else { | |
2346 | int val = *valp; | |
2347 | unsigned long lval; | |
2348 | if (val < 0) { | |
00b7c339 | 2349 | *negp = true; |
1da177e4 LT |
2350 | lval = (unsigned long)-val; |
2351 | } else { | |
00b7c339 | 2352 | *negp = false; |
1da177e4 LT |
2353 | lval = (unsigned long)val; |
2354 | } | |
2355 | *lvalp = jiffies_to_clock_t(lval); | |
2356 | } | |
2357 | return 0; | |
2358 | } | |
2359 | ||
00b7c339 | 2360 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2361 | int *valp, |
2362 | int write, void *data) | |
2363 | { | |
2364 | if (write) { | |
d738ce8f FF |
2365 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2366 | ||
2367 | if (jif > INT_MAX) | |
2368 | return 1; | |
2369 | *valp = (int)jif; | |
1da177e4 LT |
2370 | } else { |
2371 | int val = *valp; | |
2372 | unsigned long lval; | |
2373 | if (val < 0) { | |
00b7c339 | 2374 | *negp = true; |
1da177e4 LT |
2375 | lval = (unsigned long)-val; |
2376 | } else { | |
00b7c339 | 2377 | *negp = false; |
1da177e4 LT |
2378 | lval = (unsigned long)val; |
2379 | } | |
2380 | *lvalp = jiffies_to_msecs(lval); | |
2381 | } | |
2382 | return 0; | |
2383 | } | |
2384 | ||
2385 | /** | |
2386 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2387 | * @table: the sysctl table | |
2388 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2389 | * @buffer: the user buffer |
2390 | * @lenp: the size of the user buffer | |
2391 | * @ppos: file position | |
2392 | * | |
2393 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2394 | * values from/to the user buffer, treated as an ASCII string. | |
2395 | * The values read are assumed to be in seconds, and are converted into | |
2396 | * jiffies. | |
2397 | * | |
2398 | * Returns 0 on success. | |
2399 | */ | |
8d65af78 | 2400 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2401 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2402 | { | |
8d65af78 | 2403 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2404 | do_proc_dointvec_jiffies_conv,NULL); |
2405 | } | |
2406 | ||
2407 | /** | |
2408 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2409 | * @table: the sysctl table | |
2410 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2411 | * @buffer: the user buffer |
2412 | * @lenp: the size of the user buffer | |
1e5d5331 | 2413 | * @ppos: pointer to the file position |
1da177e4 LT |
2414 | * |
2415 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2416 | * values from/to the user buffer, treated as an ASCII string. | |
2417 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2418 | * are converted into jiffies. | |
2419 | * | |
2420 | * Returns 0 on success. | |
2421 | */ | |
8d65af78 | 2422 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2423 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2424 | { | |
8d65af78 | 2425 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2426 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2427 | } | |
2428 | ||
2429 | /** | |
2430 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2431 | * @table: the sysctl table | |
2432 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2433 | * @buffer: the user buffer |
2434 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2435 | * @ppos: file position |
2436 | * @ppos: the current position in the file | |
1da177e4 LT |
2437 | * |
2438 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2439 | * values from/to the user buffer, treated as an ASCII string. | |
2440 | * The values read are assumed to be in 1/1000 seconds, and | |
2441 | * are converted into jiffies. | |
2442 | * | |
2443 | * Returns 0 on success. | |
2444 | */ | |
8d65af78 | 2445 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2446 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2447 | { | |
8d65af78 | 2448 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2449 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2450 | } | |
2451 | ||
8d65af78 | 2452 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2453 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2454 | { | |
2455 | struct pid *new_pid; | |
2456 | pid_t tmp; | |
2457 | int r; | |
2458 | ||
6c5f3e7b | 2459 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2460 | |
8d65af78 | 2461 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2462 | lenp, ppos, NULL, NULL); |
2463 | if (r || !write) | |
2464 | return r; | |
2465 | ||
2466 | new_pid = find_get_pid(tmp); | |
2467 | if (!new_pid) | |
2468 | return -ESRCH; | |
2469 | ||
2470 | put_pid(xchg(&cad_pid, new_pid)); | |
2471 | return 0; | |
2472 | } | |
2473 | ||
9f977fb7 OP |
2474 | /** |
2475 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2476 | * @table: the sysctl table | |
2477 | * @write: %TRUE if this is a write to the sysctl file | |
2478 | * @buffer: the user buffer | |
2479 | * @lenp: the size of the user buffer | |
2480 | * @ppos: file position | |
2481 | * | |
2482 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2483 | * in table->maxlen. | |
2484 | * | |
2485 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2486 | * large bitmaps may be represented in a compact manner. Writing into | |
2487 | * the file will clear the bitmap then update it with the given input. | |
2488 | * | |
2489 | * Returns 0 on success. | |
2490 | */ | |
2491 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2492 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2493 | { | |
2494 | int err = 0; | |
2495 | bool first = 1; | |
2496 | size_t left = *lenp; | |
2497 | unsigned long bitmap_len = table->maxlen; | |
2498 | unsigned long *bitmap = (unsigned long *) table->data; | |
2499 | unsigned long *tmp_bitmap = NULL; | |
2500 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2501 | ||
2502 | if (!bitmap_len || !left || (*ppos && !write)) { | |
2503 | *lenp = 0; | |
2504 | return 0; | |
2505 | } | |
2506 | ||
2507 | if (write) { | |
2508 | unsigned long page = 0; | |
2509 | char *kbuf; | |
2510 | ||
2511 | if (left > PAGE_SIZE - 1) | |
2512 | left = PAGE_SIZE - 1; | |
2513 | ||
2514 | page = __get_free_page(GFP_TEMPORARY); | |
2515 | kbuf = (char *) page; | |
2516 | if (!kbuf) | |
2517 | return -ENOMEM; | |
2518 | if (copy_from_user(kbuf, buffer, left)) { | |
2519 | free_page(page); | |
2520 | return -EFAULT; | |
2521 | } | |
2522 | kbuf[left] = 0; | |
2523 | ||
2524 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2525 | GFP_KERNEL); | |
2526 | if (!tmp_bitmap) { | |
2527 | free_page(page); | |
2528 | return -ENOMEM; | |
2529 | } | |
2530 | proc_skip_char(&kbuf, &left, '\n'); | |
2531 | while (!err && left) { | |
2532 | unsigned long val_a, val_b; | |
2533 | bool neg; | |
2534 | ||
2535 | err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, | |
2536 | sizeof(tr_a), &c); | |
2537 | if (err) | |
2538 | break; | |
2539 | if (val_a >= bitmap_len || neg) { | |
2540 | err = -EINVAL; | |
2541 | break; | |
2542 | } | |
2543 | ||
2544 | val_b = val_a; | |
2545 | if (left) { | |
2546 | kbuf++; | |
2547 | left--; | |
2548 | } | |
2549 | ||
2550 | if (c == '-') { | |
2551 | err = proc_get_long(&kbuf, &left, &val_b, | |
2552 | &neg, tr_b, sizeof(tr_b), | |
2553 | &c); | |
2554 | if (err) | |
2555 | break; | |
2556 | if (val_b >= bitmap_len || neg || | |
2557 | val_a > val_b) { | |
2558 | err = -EINVAL; | |
2559 | break; | |
2560 | } | |
2561 | if (left) { | |
2562 | kbuf++; | |
2563 | left--; | |
2564 | } | |
2565 | } | |
2566 | ||
5a04cca6 | 2567 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 OP |
2568 | first = 0; |
2569 | proc_skip_char(&kbuf, &left, '\n'); | |
2570 | } | |
2571 | free_page(page); | |
2572 | } else { | |
2573 | unsigned long bit_a, bit_b = 0; | |
2574 | ||
2575 | while (left) { | |
2576 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2577 | if (bit_a >= bitmap_len) | |
2578 | break; | |
2579 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2580 | bit_a + 1) - 1; | |
2581 | ||
2582 | if (!first) { | |
2583 | err = proc_put_char(&buffer, &left, ','); | |
2584 | if (err) | |
2585 | break; | |
2586 | } | |
2587 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2588 | if (err) | |
2589 | break; | |
2590 | if (bit_a != bit_b) { | |
2591 | err = proc_put_char(&buffer, &left, '-'); | |
2592 | if (err) | |
2593 | break; | |
2594 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2595 | if (err) | |
2596 | break; | |
2597 | } | |
2598 | ||
2599 | first = 0; bit_b++; | |
2600 | } | |
2601 | if (!err) | |
2602 | err = proc_put_char(&buffer, &left, '\n'); | |
2603 | } | |
2604 | ||
2605 | if (!err) { | |
2606 | if (write) { | |
2607 | if (*ppos) | |
2608 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2609 | else | |
5a04cca6 | 2610 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2611 | } |
2612 | kfree(tmp_bitmap); | |
2613 | *lenp -= left; | |
2614 | *ppos += *lenp; | |
2615 | return 0; | |
2616 | } else { | |
2617 | kfree(tmp_bitmap); | |
2618 | return err; | |
2619 | } | |
2620 | } | |
2621 | ||
55610500 | 2622 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2623 | |
8d65af78 | 2624 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2625 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2626 | { | |
2627 | return -ENOSYS; | |
2628 | } | |
2629 | ||
8d65af78 | 2630 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2631 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2632 | { |
2633 | return -ENOSYS; | |
2634 | } | |
2635 | ||
8d65af78 | 2636 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2637 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2638 | { | |
2639 | return -ENOSYS; | |
2640 | } | |
2641 | ||
8d65af78 | 2642 | int proc_dointvec_jiffies(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_userhz_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_ms_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_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2661 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2662 | { | |
2663 | return -ENOSYS; | |
2664 | } | |
2665 | ||
d8217f07 | 2666 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2667 | void __user *buffer, |
2668 | size_t *lenp, loff_t *ppos) | |
2669 | { | |
2670 | return -ENOSYS; | |
2671 | } | |
2672 | ||
2673 | ||
55610500 | 2674 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2675 | |
1da177e4 LT |
2676 | /* |
2677 | * No sense putting this after each symbol definition, twice, | |
2678 | * exception granted :-) | |
2679 | */ | |
2680 | EXPORT_SYMBOL(proc_dointvec); | |
2681 | EXPORT_SYMBOL(proc_dointvec_jiffies); | |
2682 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2683 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2684 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2685 | EXPORT_SYMBOL(proc_dostring); | |
2686 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2687 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |