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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 | 21 | #include <linux/module.h> |
e2e40f2c | 22 | #include <linux/aio.h> |
1da177e4 LT |
23 | #include <linux/mm.h> |
24 | #include <linux/swap.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/sysctl.h> | |
5a04cca6 | 27 | #include <linux/bitmap.h> |
d33ed52d | 28 | #include <linux/signal.h> |
455cd5ab | 29 | #include <linux/printk.h> |
1da177e4 | 30 | #include <linux/proc_fs.h> |
72c2d582 | 31 | #include <linux/security.h> |
1da177e4 | 32 | #include <linux/ctype.h> |
dfec072e | 33 | #include <linux/kmemcheck.h> |
fd4b616b | 34 | #include <linux/kmemleak.h> |
62239ac2 | 35 | #include <linux/fs.h> |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <linux/kernel.h> | |
0296b228 | 38 | #include <linux/kobject.h> |
20380731 | 39 | #include <linux/net.h> |
1da177e4 LT |
40 | #include <linux/sysrq.h> |
41 | #include <linux/highuid.h> | |
42 | #include <linux/writeback.h> | |
3fff4c42 | 43 | #include <linux/ratelimit.h> |
76ab0f53 | 44 | #include <linux/compaction.h> |
1da177e4 | 45 | #include <linux/hugetlb.h> |
1da177e4 | 46 | #include <linux/initrd.h> |
0b77f5bf | 47 | #include <linux/key.h> |
1da177e4 LT |
48 | #include <linux/times.h> |
49 | #include <linux/limits.h> | |
50 | #include <linux/dcache.h> | |
6e006701 | 51 | #include <linux/dnotify.h> |
1da177e4 | 52 | #include <linux/syscalls.h> |
c748e134 | 53 | #include <linux/vmstat.h> |
c255d844 PM |
54 | #include <linux/nfs_fs.h> |
55 | #include <linux/acpi.h> | |
10a0a8d4 | 56 | #include <linux/reboot.h> |
b0fc494f | 57 | #include <linux/ftrace.h> |
cdd6c482 | 58 | #include <linux/perf_event.h> |
b2be84df | 59 | #include <linux/kprobes.h> |
b492e95b | 60 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 61 | #include <linux/oom.h> |
17f60a7d | 62 | #include <linux/kmod.h> |
73efc039 | 63 | #include <linux/capability.h> |
40401530 | 64 | #include <linux/binfmts.h> |
cf4aebc2 | 65 | #include <linux/sched/sysctl.h> |
f7ccbae4 | 66 | #include <linux/sched/coredump.h> |
7984754b | 67 | #include <linux/kexec.h> |
1be7f75d | 68 | #include <linux/bpf.h> |
d2921684 | 69 | #include <linux/mount.h> |
1da177e4 | 70 | |
7c0f6ba6 | 71 | #include <linux/uaccess.h> |
1da177e4 LT |
72 | #include <asm/processor.h> |
73 | ||
29cbc78b AK |
74 | #ifdef CONFIG_X86 |
75 | #include <asm/nmi.h> | |
0741f4d2 | 76 | #include <asm/stacktrace.h> |
6e7c4025 | 77 | #include <asm/io.h> |
29cbc78b | 78 | #endif |
d550bbd4 DH |
79 | #ifdef CONFIG_SPARC |
80 | #include <asm/setup.h> | |
81 | #endif | |
c55b7c3e DY |
82 | #ifdef CONFIG_BSD_PROCESS_ACCT |
83 | #include <linux/acct.h> | |
84 | #endif | |
4f0e056f DY |
85 | #ifdef CONFIG_RT_MUTEXES |
86 | #include <linux/rtmutex.h> | |
87 | #endif | |
2edf5e49 DY |
88 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
89 | #include <linux/lockdep.h> | |
90 | #endif | |
15485a46 DY |
91 | #ifdef CONFIG_CHR_DEV_SG |
92 | #include <scsi/sg.h> | |
93 | #endif | |
29cbc78b | 94 | |
58687acb | 95 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
96 | #include <linux/nmi.h> |
97 | #endif | |
98 | ||
1da177e4 LT |
99 | #if defined(CONFIG_SYSCTL) |
100 | ||
101 | /* External variables not in a header file. */ | |
d6e71144 | 102 | extern int suid_dumpable; |
046d662f AK |
103 | #ifdef CONFIG_COREDUMP |
104 | extern int core_uses_pid; | |
1da177e4 | 105 | extern char core_pattern[]; |
a293980c | 106 | extern unsigned int core_pipe_limit; |
046d662f | 107 | #endif |
1da177e4 | 108 | extern int pid_max; |
1da177e4 | 109 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 110 | extern int percpu_pagelist_fraction; |
9745512c | 111 | extern int latencytop_enabled; |
9b80a184 | 112 | extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
113 | #ifndef CONFIG_MMU |
114 | extern int sysctl_nr_trim_pages; | |
115 | #endif | |
1da177e4 | 116 | |
c4f3b63f | 117 | /* Constants used for minimum and maximum */ |
2508ce18 | 118 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
119 | static int sixty = 60; |
120 | #endif | |
121 | ||
270750db AT |
122 | static int __maybe_unused neg_one = -1; |
123 | ||
c4f3b63f | 124 | static int zero; |
cd5f9a4c LT |
125 | static int __maybe_unused one = 1; |
126 | static int __maybe_unused two = 2; | |
5509a5d2 | 127 | static int __maybe_unused four = 4; |
fc3501d4 | 128 | static unsigned long one_ul = 1; |
c4f3b63f | 129 | static int one_hundred = 100; |
795ae7a0 | 130 | static int one_thousand = 1000; |
af91322e DY |
131 | #ifdef CONFIG_PRINTK |
132 | static int ten_thousand = 10000; | |
133 | #endif | |
c5dfd78e ACM |
134 | #ifdef CONFIG_PERF_EVENTS |
135 | static int six_hundred_forty_kb = 640 * 1024; | |
136 | #endif | |
c4f3b63f | 137 | |
9e4a5bda AR |
138 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
139 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
140 | ||
1da177e4 LT |
141 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
142 | static int maxolduid = 65535; | |
143 | static int minolduid; | |
144 | ||
145 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 146 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 147 | |
80df2847 LH |
148 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
149 | #ifdef CONFIG_DETECT_HUNG_TASK | |
150 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
151 | #endif | |
152 | ||
d14f1729 DY |
153 | #ifdef CONFIG_INOTIFY_USER |
154 | #include <linux/inotify.h> | |
155 | #endif | |
72c57ed5 | 156 | #ifdef CONFIG_SPARC |
1da177e4 LT |
157 | #endif |
158 | ||
159 | #ifdef __hppa__ | |
160 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
161 | #endif |
162 | ||
163 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
164 | extern int unaligned_enabled; |
165 | #endif | |
1da177e4 | 166 | |
d2b176ed | 167 | #ifdef CONFIG_IA64 |
88fc241f | 168 | extern int unaligned_dump_stack; |
d2b176ed JS |
169 | #endif |
170 | ||
b6fca725 VG |
171 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
172 | extern int no_unaligned_warning; | |
173 | #endif | |
174 | ||
d6f8ff73 | 175 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 KC |
176 | |
177 | #define SYSCTL_WRITES_LEGACY -1 | |
178 | #define SYSCTL_WRITES_WARN 0 | |
179 | #define SYSCTL_WRITES_STRICT 1 | |
180 | ||
41662f5c | 181 | static int sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 182 | |
8d65af78 | 183 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 184 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 185 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 186 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 187 | #endif |
9ec52099 | 188 | |
bfdc0b49 | 189 | #ifdef CONFIG_PRINTK |
620f6e8e | 190 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
191 | void __user *buffer, size_t *lenp, loff_t *ppos); |
192 | #endif | |
193 | ||
54b50199 KC |
194 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
195 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 196 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
197 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
198 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 199 | #endif |
54b50199 | 200 | |
97f5f0cd | 201 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 202 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 203 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 204 | |
6f8fd1d7 | 205 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
206 | void __user *buffer, size_t *lenp, |
207 | loff_t *ppos) | |
208 | { | |
209 | int error; | |
210 | ||
211 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
212 | if (error) | |
213 | return error; | |
214 | ||
215 | if (write) | |
216 | sysrq_toggle_support(__sysrq_enabled); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | #endif | |
222 | ||
d8217f07 EB |
223 | static struct ctl_table kern_table[]; |
224 | static struct ctl_table vm_table[]; | |
225 | static struct ctl_table fs_table[]; | |
226 | static struct ctl_table debug_table[]; | |
227 | static struct ctl_table dev_table[]; | |
228 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
229 | #ifdef CONFIG_EPOLL |
230 | extern struct ctl_table epoll_table[]; | |
231 | #endif | |
1da177e4 LT |
232 | |
233 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
234 | int sysctl_legacy_va_layout; | |
235 | #endif | |
236 | ||
1da177e4 LT |
237 | /* The default sysctl tables: */ |
238 | ||
de4e83bd | 239 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 240 | { |
1da177e4 LT |
241 | .procname = "kernel", |
242 | .mode = 0555, | |
243 | .child = kern_table, | |
244 | }, | |
245 | { | |
1da177e4 LT |
246 | .procname = "vm", |
247 | .mode = 0555, | |
248 | .child = vm_table, | |
249 | }, | |
1da177e4 | 250 | { |
1da177e4 LT |
251 | .procname = "fs", |
252 | .mode = 0555, | |
253 | .child = fs_table, | |
254 | }, | |
255 | { | |
1da177e4 LT |
256 | .procname = "debug", |
257 | .mode = 0555, | |
258 | .child = debug_table, | |
259 | }, | |
260 | { | |
1da177e4 LT |
261 | .procname = "dev", |
262 | .mode = 0555, | |
263 | .child = dev_table, | |
264 | }, | |
6fce56ec | 265 | { } |
1da177e4 LT |
266 | }; |
267 | ||
77e54a1f | 268 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
269 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
270 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
271 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
272 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 273 | #ifdef CONFIG_SMP |
1983a922 CE |
274 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
275 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
276 | #endif /* CONFIG_SMP */ |
277 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 278 | |
5e771905 MG |
279 | #ifdef CONFIG_COMPACTION |
280 | static int min_extfrag_threshold; | |
281 | static int max_extfrag_threshold = 1000; | |
282 | #endif | |
283 | ||
d8217f07 | 284 | static struct ctl_table kern_table[] = { |
2bba22c5 | 285 | { |
2bba22c5 MG |
286 | .procname = "sched_child_runs_first", |
287 | .data = &sysctl_sched_child_runs_first, | |
288 | .maxlen = sizeof(unsigned int), | |
289 | .mode = 0644, | |
6d456111 | 290 | .proc_handler = proc_dointvec, |
2bba22c5 | 291 | }, |
77e54a1f IM |
292 | #ifdef CONFIG_SCHED_DEBUG |
293 | { | |
b2be5e96 PZ |
294 | .procname = "sched_min_granularity_ns", |
295 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
296 | .maxlen = sizeof(unsigned int), |
297 | .mode = 0644, | |
702a7c76 | 298 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
299 | .extra1 = &min_sched_granularity_ns, |
300 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 301 | }, |
21805085 | 302 | { |
21805085 PZ |
303 | .procname = "sched_latency_ns", |
304 | .data = &sysctl_sched_latency, | |
305 | .maxlen = sizeof(unsigned int), | |
306 | .mode = 0644, | |
702a7c76 | 307 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
308 | .extra1 = &min_sched_granularity_ns, |
309 | .extra2 = &max_sched_granularity_ns, | |
310 | }, | |
77e54a1f | 311 | { |
77e54a1f IM |
312 | .procname = "sched_wakeup_granularity_ns", |
313 | .data = &sysctl_sched_wakeup_granularity, | |
314 | .maxlen = sizeof(unsigned int), | |
315 | .mode = 0644, | |
702a7c76 | 316 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
317 | .extra1 = &min_wakeup_granularity_ns, |
318 | .extra2 = &max_wakeup_granularity_ns, | |
319 | }, | |
cbee9f88 | 320 | #ifdef CONFIG_SMP |
1983a922 | 321 | { |
1983a922 CE |
322 | .procname = "sched_tunable_scaling", |
323 | .data = &sysctl_sched_tunable_scaling, | |
324 | .maxlen = sizeof(enum sched_tunable_scaling), | |
325 | .mode = 0644, | |
702a7c76 | 326 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
327 | .extra1 = &min_sched_tunable_scaling, |
328 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 329 | }, |
da84d961 | 330 | { |
d00535db | 331 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
332 | .data = &sysctl_sched_migration_cost, |
333 | .maxlen = sizeof(unsigned int), | |
334 | .mode = 0644, | |
6d456111 | 335 | .proc_handler = proc_dointvec, |
da84d961 | 336 | }, |
b82d9fdd | 337 | { |
b82d9fdd PZ |
338 | .procname = "sched_nr_migrate", |
339 | .data = &sysctl_sched_nr_migrate, | |
340 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 341 | .mode = 0644, |
6d456111 | 342 | .proc_handler = proc_dointvec, |
fa85ae24 | 343 | }, |
e9e9250b | 344 | { |
d00535db | 345 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
346 | .data = &sysctl_sched_time_avg, |
347 | .maxlen = sizeof(unsigned int), | |
348 | .mode = 0644, | |
6d456111 | 349 | .proc_handler = proc_dointvec, |
e9e9250b | 350 | }, |
cb251765 MG |
351 | #ifdef CONFIG_SCHEDSTATS |
352 | { | |
353 | .procname = "sched_schedstats", | |
354 | .data = NULL, | |
355 | .maxlen = sizeof(unsigned int), | |
356 | .mode = 0644, | |
357 | .proc_handler = sysctl_schedstats, | |
358 | .extra1 = &zero, | |
359 | .extra2 = &one, | |
360 | }, | |
361 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
362 | #endif /* CONFIG_SMP */ |
363 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
364 | { |
365 | .procname = "numa_balancing_scan_delay_ms", | |
366 | .data = &sysctl_numa_balancing_scan_delay, | |
367 | .maxlen = sizeof(unsigned int), | |
368 | .mode = 0644, | |
369 | .proc_handler = proc_dointvec, | |
370 | }, | |
cbee9f88 PZ |
371 | { |
372 | .procname = "numa_balancing_scan_period_min_ms", | |
373 | .data = &sysctl_numa_balancing_scan_period_min, | |
374 | .maxlen = sizeof(unsigned int), | |
375 | .mode = 0644, | |
376 | .proc_handler = proc_dointvec, | |
377 | }, | |
378 | { | |
379 | .procname = "numa_balancing_scan_period_max_ms", | |
380 | .data = &sysctl_numa_balancing_scan_period_max, | |
381 | .maxlen = sizeof(unsigned int), | |
382 | .mode = 0644, | |
383 | .proc_handler = proc_dointvec, | |
384 | }, | |
6e5fb223 PZ |
385 | { |
386 | .procname = "numa_balancing_scan_size_mb", | |
387 | .data = &sysctl_numa_balancing_scan_size, | |
388 | .maxlen = sizeof(unsigned int), | |
389 | .mode = 0644, | |
64192658 KT |
390 | .proc_handler = proc_dointvec_minmax, |
391 | .extra1 = &one, | |
6e5fb223 | 392 | }, |
54a43d54 AK |
393 | { |
394 | .procname = "numa_balancing", | |
395 | .data = NULL, /* filled in by handler */ | |
396 | .maxlen = sizeof(unsigned int), | |
397 | .mode = 0644, | |
398 | .proc_handler = sysctl_numa_balancing, | |
399 | .extra1 = &zero, | |
400 | .extra2 = &one, | |
401 | }, | |
cbee9f88 PZ |
402 | #endif /* CONFIG_NUMA_BALANCING */ |
403 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 404 | { |
9f0c1e56 PZ |
405 | .procname = "sched_rt_period_us", |
406 | .data = &sysctl_sched_rt_period, | |
407 | .maxlen = sizeof(unsigned int), | |
408 | .mode = 0644, | |
6d456111 | 409 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
410 | }, |
411 | { | |
9f0c1e56 PZ |
412 | .procname = "sched_rt_runtime_us", |
413 | .data = &sysctl_sched_rt_runtime, | |
414 | .maxlen = sizeof(int), | |
415 | .mode = 0644, | |
6d456111 | 416 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 417 | }, |
ce0dbbbb CW |
418 | { |
419 | .procname = "sched_rr_timeslice_ms", | |
975e155e | 420 | .data = &sysctl_sched_rr_timeslice, |
ce0dbbbb CW |
421 | .maxlen = sizeof(int), |
422 | .mode = 0644, | |
423 | .proc_handler = sched_rr_handler, | |
424 | }, | |
5091faa4 MG |
425 | #ifdef CONFIG_SCHED_AUTOGROUP |
426 | { | |
427 | .procname = "sched_autogroup_enabled", | |
428 | .data = &sysctl_sched_autogroup_enabled, | |
429 | .maxlen = sizeof(unsigned int), | |
430 | .mode = 0644, | |
1747b21f | 431 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
432 | .extra1 = &zero, |
433 | .extra2 = &one, | |
434 | }, | |
435 | #endif | |
ec12cb7f PT |
436 | #ifdef CONFIG_CFS_BANDWIDTH |
437 | { | |
438 | .procname = "sched_cfs_bandwidth_slice_us", | |
439 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
440 | .maxlen = sizeof(unsigned int), | |
441 | .mode = 0644, | |
442 | .proc_handler = proc_dointvec_minmax, | |
443 | .extra1 = &one, | |
444 | }, | |
445 | #endif | |
f20786ff PZ |
446 | #ifdef CONFIG_PROVE_LOCKING |
447 | { | |
f20786ff PZ |
448 | .procname = "prove_locking", |
449 | .data = &prove_locking, | |
450 | .maxlen = sizeof(int), | |
451 | .mode = 0644, | |
6d456111 | 452 | .proc_handler = proc_dointvec, |
f20786ff PZ |
453 | }, |
454 | #endif | |
455 | #ifdef CONFIG_LOCK_STAT | |
456 | { | |
f20786ff PZ |
457 | .procname = "lock_stat", |
458 | .data = &lock_stat, | |
459 | .maxlen = sizeof(int), | |
460 | .mode = 0644, | |
6d456111 | 461 | .proc_handler = proc_dointvec, |
f20786ff | 462 | }, |
77e54a1f | 463 | #endif |
1da177e4 | 464 | { |
1da177e4 LT |
465 | .procname = "panic", |
466 | .data = &panic_timeout, | |
467 | .maxlen = sizeof(int), | |
468 | .mode = 0644, | |
6d456111 | 469 | .proc_handler = proc_dointvec, |
1da177e4 | 470 | }, |
046d662f | 471 | #ifdef CONFIG_COREDUMP |
1da177e4 | 472 | { |
1da177e4 LT |
473 | .procname = "core_uses_pid", |
474 | .data = &core_uses_pid, | |
475 | .maxlen = sizeof(int), | |
476 | .mode = 0644, | |
6d456111 | 477 | .proc_handler = proc_dointvec, |
1da177e4 LT |
478 | }, |
479 | { | |
1da177e4 LT |
480 | .procname = "core_pattern", |
481 | .data = core_pattern, | |
71ce92f3 | 482 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 483 | .mode = 0644, |
54b50199 | 484 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 485 | }, |
a293980c | 486 | { |
a293980c NH |
487 | .procname = "core_pipe_limit", |
488 | .data = &core_pipe_limit, | |
489 | .maxlen = sizeof(unsigned int), | |
490 | .mode = 0644, | |
6d456111 | 491 | .proc_handler = proc_dointvec, |
a293980c | 492 | }, |
046d662f | 493 | #endif |
34f5a398 | 494 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 495 | { |
1da177e4 | 496 | .procname = "tainted", |
25ddbb18 | 497 | .maxlen = sizeof(long), |
34f5a398 | 498 | .mode = 0644, |
6d456111 | 499 | .proc_handler = proc_taint, |
1da177e4 | 500 | }, |
f4aacea2 KC |
501 | { |
502 | .procname = "sysctl_writes_strict", | |
503 | .data = &sysctl_writes_strict, | |
504 | .maxlen = sizeof(int), | |
505 | .mode = 0644, | |
506 | .proc_handler = proc_dointvec_minmax, | |
507 | .extra1 = &neg_one, | |
508 | .extra2 = &one, | |
509 | }, | |
34f5a398 | 510 | #endif |
9745512c AV |
511 | #ifdef CONFIG_LATENCYTOP |
512 | { | |
513 | .procname = "latencytop", | |
514 | .data = &latencytop_enabled, | |
515 | .maxlen = sizeof(int), | |
516 | .mode = 0644, | |
cb251765 | 517 | .proc_handler = sysctl_latencytop, |
9745512c AV |
518 | }, |
519 | #endif | |
1da177e4 LT |
520 | #ifdef CONFIG_BLK_DEV_INITRD |
521 | { | |
1da177e4 LT |
522 | .procname = "real-root-dev", |
523 | .data = &real_root_dev, | |
524 | .maxlen = sizeof(int), | |
525 | .mode = 0644, | |
6d456111 | 526 | .proc_handler = proc_dointvec, |
1da177e4 LT |
527 | }, |
528 | #endif | |
45807a1d | 529 | { |
45807a1d IM |
530 | .procname = "print-fatal-signals", |
531 | .data = &print_fatal_signals, | |
532 | .maxlen = sizeof(int), | |
533 | .mode = 0644, | |
6d456111 | 534 | .proc_handler = proc_dointvec, |
45807a1d | 535 | }, |
72c57ed5 | 536 | #ifdef CONFIG_SPARC |
1da177e4 | 537 | { |
1da177e4 LT |
538 | .procname = "reboot-cmd", |
539 | .data = reboot_command, | |
540 | .maxlen = 256, | |
541 | .mode = 0644, | |
6d456111 | 542 | .proc_handler = proc_dostring, |
1da177e4 LT |
543 | }, |
544 | { | |
1da177e4 LT |
545 | .procname = "stop-a", |
546 | .data = &stop_a_enabled, | |
547 | .maxlen = sizeof (int), | |
548 | .mode = 0644, | |
6d456111 | 549 | .proc_handler = proc_dointvec, |
1da177e4 LT |
550 | }, |
551 | { | |
1da177e4 LT |
552 | .procname = "scons-poweroff", |
553 | .data = &scons_pwroff, | |
554 | .maxlen = sizeof (int), | |
555 | .mode = 0644, | |
6d456111 | 556 | .proc_handler = proc_dointvec, |
1da177e4 LT |
557 | }, |
558 | #endif | |
0871420f DM |
559 | #ifdef CONFIG_SPARC64 |
560 | { | |
0871420f DM |
561 | .procname = "tsb-ratio", |
562 | .data = &sysctl_tsb_ratio, | |
563 | .maxlen = sizeof (int), | |
564 | .mode = 0644, | |
6d456111 | 565 | .proc_handler = proc_dointvec, |
0871420f DM |
566 | }, |
567 | #endif | |
1da177e4 LT |
568 | #ifdef __hppa__ |
569 | { | |
1da177e4 LT |
570 | .procname = "soft-power", |
571 | .data = &pwrsw_enabled, | |
572 | .maxlen = sizeof (int), | |
573 | .mode = 0644, | |
6d456111 | 574 | .proc_handler = proc_dointvec, |
1da177e4 | 575 | }, |
bf14e3b9 VG |
576 | #endif |
577 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 578 | { |
1da177e4 LT |
579 | .procname = "unaligned-trap", |
580 | .data = &unaligned_enabled, | |
581 | .maxlen = sizeof (int), | |
582 | .mode = 0644, | |
6d456111 | 583 | .proc_handler = proc_dointvec, |
1da177e4 LT |
584 | }, |
585 | #endif | |
586 | { | |
1da177e4 LT |
587 | .procname = "ctrl-alt-del", |
588 | .data = &C_A_D, | |
589 | .maxlen = sizeof(int), | |
590 | .mode = 0644, | |
6d456111 | 591 | .proc_handler = proc_dointvec, |
1da177e4 | 592 | }, |
606576ce | 593 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 594 | { |
b0fc494f SR |
595 | .procname = "ftrace_enabled", |
596 | .data = &ftrace_enabled, | |
597 | .maxlen = sizeof(int), | |
598 | .mode = 0644, | |
6d456111 | 599 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
600 | }, |
601 | #endif | |
f38f1d2a SR |
602 | #ifdef CONFIG_STACK_TRACER |
603 | { | |
f38f1d2a SR |
604 | .procname = "stack_tracer_enabled", |
605 | .data = &stack_tracer_enabled, | |
606 | .maxlen = sizeof(int), | |
607 | .mode = 0644, | |
6d456111 | 608 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
609 | }, |
610 | #endif | |
944ac425 SR |
611 | #ifdef CONFIG_TRACING |
612 | { | |
3299b4dd | 613 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
614 | .data = &ftrace_dump_on_oops, |
615 | .maxlen = sizeof(int), | |
616 | .mode = 0644, | |
6d456111 | 617 | .proc_handler = proc_dointvec, |
944ac425 | 618 | }, |
de7edd31 SRRH |
619 | { |
620 | .procname = "traceoff_on_warning", | |
621 | .data = &__disable_trace_on_warning, | |
622 | .maxlen = sizeof(__disable_trace_on_warning), | |
623 | .mode = 0644, | |
624 | .proc_handler = proc_dointvec, | |
625 | }, | |
0daa2302 SRRH |
626 | { |
627 | .procname = "tracepoint_printk", | |
628 | .data = &tracepoint_printk, | |
629 | .maxlen = sizeof(tracepoint_printk), | |
630 | .mode = 0644, | |
42391745 | 631 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 632 | }, |
944ac425 | 633 | #endif |
2965faa5 | 634 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
635 | { |
636 | .procname = "kexec_load_disabled", | |
637 | .data = &kexec_load_disabled, | |
638 | .maxlen = sizeof(int), | |
639 | .mode = 0644, | |
640 | /* only handle a transition from default "0" to "1" */ | |
641 | .proc_handler = proc_dointvec_minmax, | |
642 | .extra1 = &one, | |
643 | .extra2 = &one, | |
644 | }, | |
645 | #endif | |
a1ef5adb | 646 | #ifdef CONFIG_MODULES |
1da177e4 | 647 | { |
1da177e4 LT |
648 | .procname = "modprobe", |
649 | .data = &modprobe_path, | |
650 | .maxlen = KMOD_PATH_LEN, | |
651 | .mode = 0644, | |
6d456111 | 652 | .proc_handler = proc_dostring, |
1da177e4 | 653 | }, |
3d43321b | 654 | { |
3d43321b KC |
655 | .procname = "modules_disabled", |
656 | .data = &modules_disabled, | |
657 | .maxlen = sizeof(int), | |
658 | .mode = 0644, | |
659 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 660 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
661 | .extra1 = &one, |
662 | .extra2 = &one, | |
663 | }, | |
1da177e4 | 664 | #endif |
86d56134 | 665 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 666 | { |
1da177e4 | 667 | .procname = "hotplug", |
312c004d KS |
668 | .data = &uevent_helper, |
669 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 670 | .mode = 0644, |
6d456111 | 671 | .proc_handler = proc_dostring, |
1da177e4 | 672 | }, |
86d56134 | 673 | #endif |
1da177e4 LT |
674 | #ifdef CONFIG_CHR_DEV_SG |
675 | { | |
1da177e4 LT |
676 | .procname = "sg-big-buff", |
677 | .data = &sg_big_buff, | |
678 | .maxlen = sizeof (int), | |
679 | .mode = 0444, | |
6d456111 | 680 | .proc_handler = proc_dointvec, |
1da177e4 LT |
681 | }, |
682 | #endif | |
683 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
684 | { | |
1da177e4 LT |
685 | .procname = "acct", |
686 | .data = &acct_parm, | |
687 | .maxlen = 3*sizeof(int), | |
688 | .mode = 0644, | |
6d456111 | 689 | .proc_handler = proc_dointvec, |
1da177e4 LT |
690 | }, |
691 | #endif | |
1da177e4 LT |
692 | #ifdef CONFIG_MAGIC_SYSRQ |
693 | { | |
1da177e4 | 694 | .procname = "sysrq", |
5d6f647f | 695 | .data = &__sysrq_enabled, |
1da177e4 LT |
696 | .maxlen = sizeof (int), |
697 | .mode = 0644, | |
97f5f0cd | 698 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
699 | }, |
700 | #endif | |
d6f8ff73 | 701 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 702 | { |
1da177e4 | 703 | .procname = "cad_pid", |
9ec52099 | 704 | .data = NULL, |
1da177e4 LT |
705 | .maxlen = sizeof (int), |
706 | .mode = 0600, | |
6d456111 | 707 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 708 | }, |
d6f8ff73 | 709 | #endif |
1da177e4 | 710 | { |
1da177e4 | 711 | .procname = "threads-max", |
16db3d3f | 712 | .data = NULL, |
1da177e4 LT |
713 | .maxlen = sizeof(int), |
714 | .mode = 0644, | |
16db3d3f | 715 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
716 | }, |
717 | { | |
1da177e4 LT |
718 | .procname = "random", |
719 | .mode = 0555, | |
720 | .child = random_table, | |
721 | }, | |
17f60a7d EP |
722 | { |
723 | .procname = "usermodehelper", | |
724 | .mode = 0555, | |
725 | .child = usermodehelper_table, | |
726 | }, | |
1da177e4 | 727 | { |
1da177e4 LT |
728 | .procname = "overflowuid", |
729 | .data = &overflowuid, | |
730 | .maxlen = sizeof(int), | |
731 | .mode = 0644, | |
6d456111 | 732 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
733 | .extra1 = &minolduid, |
734 | .extra2 = &maxolduid, | |
735 | }, | |
736 | { | |
1da177e4 LT |
737 | .procname = "overflowgid", |
738 | .data = &overflowgid, | |
739 | .maxlen = sizeof(int), | |
740 | .mode = 0644, | |
6d456111 | 741 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
742 | .extra1 = &minolduid, |
743 | .extra2 = &maxolduid, | |
744 | }, | |
347a8dc3 | 745 | #ifdef CONFIG_S390 |
1da177e4 LT |
746 | #ifdef CONFIG_MATHEMU |
747 | { | |
1da177e4 LT |
748 | .procname = "ieee_emulation_warnings", |
749 | .data = &sysctl_ieee_emulation_warnings, | |
750 | .maxlen = sizeof(int), | |
751 | .mode = 0644, | |
6d456111 | 752 | .proc_handler = proc_dointvec, |
1da177e4 | 753 | }, |
1da177e4 LT |
754 | #endif |
755 | { | |
1da177e4 | 756 | .procname = "userprocess_debug", |
ab3c68ee | 757 | .data = &show_unhandled_signals, |
1da177e4 LT |
758 | .maxlen = sizeof(int), |
759 | .mode = 0644, | |
6d456111 | 760 | .proc_handler = proc_dointvec, |
1da177e4 LT |
761 | }, |
762 | #endif | |
763 | { | |
1da177e4 LT |
764 | .procname = "pid_max", |
765 | .data = &pid_max, | |
766 | .maxlen = sizeof (int), | |
767 | .mode = 0644, | |
6d456111 | 768 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
769 | .extra1 = &pid_max_min, |
770 | .extra2 = &pid_max_max, | |
771 | }, | |
772 | { | |
1da177e4 LT |
773 | .procname = "panic_on_oops", |
774 | .data = &panic_on_oops, | |
775 | .maxlen = sizeof(int), | |
776 | .mode = 0644, | |
6d456111 | 777 | .proc_handler = proc_dointvec, |
1da177e4 | 778 | }, |
7ef3d2fd JP |
779 | #if defined CONFIG_PRINTK |
780 | { | |
7ef3d2fd JP |
781 | .procname = "printk", |
782 | .data = &console_loglevel, | |
783 | .maxlen = 4*sizeof(int), | |
784 | .mode = 0644, | |
6d456111 | 785 | .proc_handler = proc_dointvec, |
7ef3d2fd | 786 | }, |
1da177e4 | 787 | { |
1da177e4 | 788 | .procname = "printk_ratelimit", |
717115e1 | 789 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
790 | .maxlen = sizeof(int), |
791 | .mode = 0644, | |
6d456111 | 792 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
793 | }, |
794 | { | |
1da177e4 | 795 | .procname = "printk_ratelimit_burst", |
717115e1 | 796 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
797 | .maxlen = sizeof(int), |
798 | .mode = 0644, | |
6d456111 | 799 | .proc_handler = proc_dointvec, |
1da177e4 | 800 | }, |
af91322e | 801 | { |
af91322e DY |
802 | .procname = "printk_delay", |
803 | .data = &printk_delay_msec, | |
804 | .maxlen = sizeof(int), | |
805 | .mode = 0644, | |
6d456111 | 806 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
807 | .extra1 = &zero, |
808 | .extra2 = &ten_thousand, | |
809 | }, | |
750afe7b BP |
810 | { |
811 | .procname = "printk_devkmsg", | |
812 | .data = devkmsg_log_str, | |
813 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
814 | .mode = 0644, | |
815 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
816 | }, | |
eaf06b24 DR |
817 | { |
818 | .procname = "dmesg_restrict", | |
819 | .data = &dmesg_restrict, | |
820 | .maxlen = sizeof(int), | |
821 | .mode = 0644, | |
620f6e8e | 822 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
823 | .extra1 = &zero, |
824 | .extra2 = &one, | |
825 | }, | |
455cd5ab DR |
826 | { |
827 | .procname = "kptr_restrict", | |
828 | .data = &kptr_restrict, | |
829 | .maxlen = sizeof(int), | |
830 | .mode = 0644, | |
620f6e8e | 831 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
832 | .extra1 = &zero, |
833 | .extra2 = &two, | |
834 | }, | |
df6e61d4 | 835 | #endif |
1da177e4 | 836 | { |
1da177e4 LT |
837 | .procname = "ngroups_max", |
838 | .data = &ngroups_max, | |
839 | .maxlen = sizeof (int), | |
840 | .mode = 0444, | |
6d456111 | 841 | .proc_handler = proc_dointvec, |
1da177e4 | 842 | }, |
73efc039 DB |
843 | { |
844 | .procname = "cap_last_cap", | |
845 | .data = (void *)&cap_last_cap, | |
846 | .maxlen = sizeof(int), | |
847 | .mode = 0444, | |
848 | .proc_handler = proc_dointvec, | |
849 | }, | |
58687acb | 850 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 851 | { |
58687acb | 852 | .procname = "watchdog", |
3c00ea82 | 853 | .data = &watchdog_user_enabled, |
504d7cf1 DZ |
854 | .maxlen = sizeof (int), |
855 | .mode = 0644, | |
195daf66 | 856 | .proc_handler = proc_watchdog, |
586692a5 MSB |
857 | .extra1 = &zero, |
858 | .extra2 = &one, | |
58687acb DZ |
859 | }, |
860 | { | |
861 | .procname = "watchdog_thresh", | |
586692a5 | 862 | .data = &watchdog_thresh, |
58687acb DZ |
863 | .maxlen = sizeof(int), |
864 | .mode = 0644, | |
195daf66 | 865 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 866 | .extra1 = &zero, |
58687acb | 867 | .extra2 = &sixty, |
504d7cf1 | 868 | }, |
195daf66 UO |
869 | { |
870 | .procname = "nmi_watchdog", | |
871 | .data = &nmi_watchdog_enabled, | |
872 | .maxlen = sizeof (int), | |
873 | .mode = 0644, | |
874 | .proc_handler = proc_nmi_watchdog, | |
875 | .extra1 = &zero, | |
876 | #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) | |
877 | .extra2 = &one, | |
878 | #else | |
879 | .extra2 = &zero, | |
880 | #endif | |
881 | }, | |
882 | { | |
883 | .procname = "soft_watchdog", | |
884 | .data = &soft_watchdog_enabled, | |
885 | .maxlen = sizeof (int), | |
886 | .mode = 0644, | |
887 | .proc_handler = proc_soft_watchdog, | |
888 | .extra1 = &zero, | |
889 | .extra2 = &one, | |
890 | }, | |
fe4ba3c3 CM |
891 | { |
892 | .procname = "watchdog_cpumask", | |
893 | .data = &watchdog_cpumask_bits, | |
894 | .maxlen = NR_CPUS, | |
895 | .mode = 0644, | |
896 | .proc_handler = proc_watchdog_cpumask, | |
897 | }, | |
2508ce18 DZ |
898 | { |
899 | .procname = "softlockup_panic", | |
900 | .data = &softlockup_panic, | |
901 | .maxlen = sizeof(int), | |
902 | .mode = 0644, | |
903 | .proc_handler = proc_dointvec_minmax, | |
904 | .extra1 = &zero, | |
905 | .extra2 = &one, | |
906 | }, | |
ac1f5912 DZ |
907 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
908 | { | |
909 | .procname = "hardlockup_panic", | |
910 | .data = &hardlockup_panic, | |
911 | .maxlen = sizeof(int), | |
912 | .mode = 0644, | |
913 | .proc_handler = proc_dointvec_minmax, | |
914 | .extra1 = &zero, | |
915 | .extra2 = &one, | |
916 | }, | |
917 | #endif | |
ed235875 AT |
918 | #ifdef CONFIG_SMP |
919 | { | |
920 | .procname = "softlockup_all_cpu_backtrace", | |
921 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
922 | .maxlen = sizeof(int), | |
923 | .mode = 0644, | |
924 | .proc_handler = proc_dointvec_minmax, | |
925 | .extra1 = &zero, | |
926 | .extra2 = &one, | |
927 | }, | |
55537871 JK |
928 | { |
929 | .procname = "hardlockup_all_cpu_backtrace", | |
930 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
931 | .maxlen = sizeof(int), | |
932 | .mode = 0644, | |
933 | .proc_handler = proc_dointvec_minmax, | |
934 | .extra1 = &zero, | |
935 | .extra2 = &one, | |
936 | }, | |
ed235875 | 937 | #endif /* CONFIG_SMP */ |
5dc30558 DZ |
938 | #endif |
939 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) | |
940 | { | |
941 | .procname = "unknown_nmi_panic", | |
942 | .data = &unknown_nmi_panic, | |
943 | .maxlen = sizeof (int), | |
944 | .mode = 0644, | |
945 | .proc_handler = proc_dointvec, | |
946 | }, | |
504d7cf1 | 947 | #endif |
1da177e4 | 948 | #if defined(CONFIG_X86) |
8da5adda | 949 | { |
8da5adda DZ |
950 | .procname = "panic_on_unrecovered_nmi", |
951 | .data = &panic_on_unrecovered_nmi, | |
952 | .maxlen = sizeof(int), | |
953 | .mode = 0644, | |
6d456111 | 954 | .proc_handler = proc_dointvec, |
8da5adda | 955 | }, |
5211a242 | 956 | { |
5211a242 KG |
957 | .procname = "panic_on_io_nmi", |
958 | .data = &panic_on_io_nmi, | |
959 | .maxlen = sizeof(int), | |
960 | .mode = 0644, | |
6d456111 | 961 | .proc_handler = proc_dointvec, |
5211a242 | 962 | }, |
55af7796 MH |
963 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
964 | { | |
965 | .procname = "panic_on_stackoverflow", | |
966 | .data = &sysctl_panic_on_stackoverflow, | |
967 | .maxlen = sizeof(int), | |
968 | .mode = 0644, | |
969 | .proc_handler = proc_dointvec, | |
970 | }, | |
971 | #endif | |
1da177e4 | 972 | { |
1da177e4 LT |
973 | .procname = "bootloader_type", |
974 | .data = &bootloader_type, | |
975 | .maxlen = sizeof (int), | |
976 | .mode = 0444, | |
6d456111 | 977 | .proc_handler = proc_dointvec, |
1da177e4 | 978 | }, |
5031296c | 979 | { |
5031296c PA |
980 | .procname = "bootloader_version", |
981 | .data = &bootloader_version, | |
982 | .maxlen = sizeof (int), | |
983 | .mode = 0444, | |
6d456111 | 984 | .proc_handler = proc_dointvec, |
5031296c | 985 | }, |
6e7c4025 | 986 | { |
6e7c4025 IM |
987 | .procname = "io_delay_type", |
988 | .data = &io_delay_type, | |
989 | .maxlen = sizeof(int), | |
990 | .mode = 0644, | |
6d456111 | 991 | .proc_handler = proc_dointvec, |
6e7c4025 | 992 | }, |
1da177e4 | 993 | #endif |
7a9166e3 | 994 | #if defined(CONFIG_MMU) |
1da177e4 | 995 | { |
1da177e4 LT |
996 | .procname = "randomize_va_space", |
997 | .data = &randomize_va_space, | |
998 | .maxlen = sizeof(int), | |
999 | .mode = 0644, | |
6d456111 | 1000 | .proc_handler = proc_dointvec, |
1da177e4 | 1001 | }, |
7a9166e3 | 1002 | #endif |
0152fb37 | 1003 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1004 | { |
951f22d5 MS |
1005 | .procname = "spin_retry", |
1006 | .data = &spin_retry, | |
1007 | .maxlen = sizeof (int), | |
1008 | .mode = 0644, | |
6d456111 | 1009 | .proc_handler = proc_dointvec, |
951f22d5 | 1010 | }, |
c255d844 | 1011 | #endif |
673d5b43 | 1012 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1013 | { |
c255d844 | 1014 | .procname = "acpi_video_flags", |
77afcf78 | 1015 | .data = &acpi_realmode_flags, |
c255d844 PM |
1016 | .maxlen = sizeof (unsigned long), |
1017 | .mode = 0644, | |
6d456111 | 1018 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1019 | }, |
d2b176ed | 1020 | #endif |
b6fca725 | 1021 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1022 | { |
d2b176ed JS |
1023 | .procname = "ignore-unaligned-usertrap", |
1024 | .data = &no_unaligned_warning, | |
1025 | .maxlen = sizeof (int), | |
1026 | .mode = 0644, | |
6d456111 | 1027 | .proc_handler = proc_dointvec, |
d2b176ed | 1028 | }, |
b6fca725 VG |
1029 | #endif |
1030 | #ifdef CONFIG_IA64 | |
88fc241f | 1031 | { |
88fc241f DC |
1032 | .procname = "unaligned-dump-stack", |
1033 | .data = &unaligned_dump_stack, | |
1034 | .maxlen = sizeof (int), | |
1035 | .mode = 0644, | |
6d456111 | 1036 | .proc_handler = proc_dointvec, |
88fc241f | 1037 | }, |
bebfa101 | 1038 | #endif |
e162b39a MSB |
1039 | #ifdef CONFIG_DETECT_HUNG_TASK |
1040 | { | |
e162b39a MSB |
1041 | .procname = "hung_task_panic", |
1042 | .data = &sysctl_hung_task_panic, | |
1043 | .maxlen = sizeof(int), | |
1044 | .mode = 0644, | |
6d456111 | 1045 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1046 | .extra1 = &zero, |
1047 | .extra2 = &one, | |
1048 | }, | |
82a1fcb9 | 1049 | { |
82a1fcb9 IM |
1050 | .procname = "hung_task_check_count", |
1051 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1052 | .maxlen = sizeof(int), |
82a1fcb9 | 1053 | .mode = 0644, |
cd64647f LZ |
1054 | .proc_handler = proc_dointvec_minmax, |
1055 | .extra1 = &zero, | |
82a1fcb9 IM |
1056 | }, |
1057 | { | |
82a1fcb9 IM |
1058 | .procname = "hung_task_timeout_secs", |
1059 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1060 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1061 | .mode = 0644, |
6d456111 | 1062 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1063 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1064 | }, |
1065 | { | |
82a1fcb9 IM |
1066 | .procname = "hung_task_warnings", |
1067 | .data = &sysctl_hung_task_warnings, | |
270750db | 1068 | .maxlen = sizeof(int), |
82a1fcb9 | 1069 | .mode = 0644, |
270750db AT |
1070 | .proc_handler = proc_dointvec_minmax, |
1071 | .extra1 = &neg_one, | |
82a1fcb9 | 1072 | }, |
c4f3b63f | 1073 | #endif |
23f78d4a IM |
1074 | #ifdef CONFIG_RT_MUTEXES |
1075 | { | |
23f78d4a IM |
1076 | .procname = "max_lock_depth", |
1077 | .data = &max_lock_depth, | |
1078 | .maxlen = sizeof(int), | |
1079 | .mode = 0644, | |
6d456111 | 1080 | .proc_handler = proc_dointvec, |
23f78d4a | 1081 | }, |
5096add8 | 1082 | #endif |
10a0a8d4 | 1083 | { |
10a0a8d4 JF |
1084 | .procname = "poweroff_cmd", |
1085 | .data = &poweroff_cmd, | |
1086 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1087 | .mode = 0644, | |
6d456111 | 1088 | .proc_handler = proc_dostring, |
10a0a8d4 | 1089 | }, |
0b77f5bf DH |
1090 | #ifdef CONFIG_KEYS |
1091 | { | |
0b77f5bf DH |
1092 | .procname = "keys", |
1093 | .mode = 0555, | |
1094 | .child = key_sysctls, | |
1095 | }, | |
1096 | #endif | |
cdd6c482 | 1097 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1098 | /* |
1099 | * User-space scripts rely on the existence of this file | |
1100 | * as a feature check for perf_events being enabled. | |
1101 | * | |
1102 | * So it's an ABI, do not remove! | |
1103 | */ | |
1ccd1549 | 1104 | { |
cdd6c482 IM |
1105 | .procname = "perf_event_paranoid", |
1106 | .data = &sysctl_perf_event_paranoid, | |
1107 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1108 | .mode = 0644, |
6d456111 | 1109 | .proc_handler = proc_dointvec, |
1ccd1549 | 1110 | }, |
c5078f78 | 1111 | { |
cdd6c482 IM |
1112 | .procname = "perf_event_mlock_kb", |
1113 | .data = &sysctl_perf_event_mlock, | |
1114 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1115 | .mode = 0644, |
6d456111 | 1116 | .proc_handler = proc_dointvec, |
c5078f78 | 1117 | }, |
a78ac325 | 1118 | { |
cdd6c482 IM |
1119 | .procname = "perf_event_max_sample_rate", |
1120 | .data = &sysctl_perf_event_sample_rate, | |
1121 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1122 | .mode = 0644, |
163ec435 | 1123 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1124 | .extra1 = &one, |
a78ac325 | 1125 | }, |
14c63f17 DH |
1126 | { |
1127 | .procname = "perf_cpu_time_max_percent", | |
1128 | .data = &sysctl_perf_cpu_time_max_percent, | |
1129 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1130 | .mode = 0644, | |
1131 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1132 | .extra1 = &zero, | |
1133 | .extra2 = &one_hundred, | |
1134 | }, | |
c5dfd78e ACM |
1135 | { |
1136 | .procname = "perf_event_max_stack", | |
a831100a | 1137 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1138 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1139 | .mode = 0644, | |
1140 | .proc_handler = perf_event_max_stack_handler, | |
1141 | .extra1 = &zero, | |
1142 | .extra2 = &six_hundred_forty_kb, | |
1143 | }, | |
c85b0334 ACM |
1144 | { |
1145 | .procname = "perf_event_max_contexts_per_stack", | |
1146 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1147 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1148 | .mode = 0644, | |
1149 | .proc_handler = perf_event_max_stack_handler, | |
1150 | .extra1 = &zero, | |
1151 | .extra2 = &one_thousand, | |
1152 | }, | |
1ccd1549 | 1153 | #endif |
dfec072e VN |
1154 | #ifdef CONFIG_KMEMCHECK |
1155 | { | |
dfec072e VN |
1156 | .procname = "kmemcheck", |
1157 | .data = &kmemcheck_enabled, | |
1158 | .maxlen = sizeof(int), | |
1159 | .mode = 0644, | |
6d456111 | 1160 | .proc_handler = proc_dointvec, |
dfec072e | 1161 | }, |
cb684b5b | 1162 | #endif |
9e3961a0 PB |
1163 | { |
1164 | .procname = "panic_on_warn", | |
1165 | .data = &panic_on_warn, | |
1166 | .maxlen = sizeof(int), | |
1167 | .mode = 0644, | |
1168 | .proc_handler = proc_dointvec_minmax, | |
1169 | .extra1 = &zero, | |
1170 | .extra2 = &one, | |
1171 | }, | |
bc7a34b8 TG |
1172 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1173 | { | |
1174 | .procname = "timer_migration", | |
1175 | .data = &sysctl_timer_migration, | |
1176 | .maxlen = sizeof(unsigned int), | |
1177 | .mode = 0644, | |
1178 | .proc_handler = timer_migration_handler, | |
1179 | }, | |
1be7f75d AS |
1180 | #endif |
1181 | #ifdef CONFIG_BPF_SYSCALL | |
1182 | { | |
1183 | .procname = "unprivileged_bpf_disabled", | |
1184 | .data = &sysctl_unprivileged_bpf_disabled, | |
1185 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1186 | .mode = 0644, | |
1187 | /* only handle a transition from default "0" to "1" */ | |
1188 | .proc_handler = proc_dointvec_minmax, | |
1189 | .extra1 = &one, | |
1190 | .extra2 = &one, | |
1191 | }, | |
088e9d25 DBO |
1192 | #endif |
1193 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) | |
1194 | { | |
1195 | .procname = "panic_on_rcu_stall", | |
1196 | .data = &sysctl_panic_on_rcu_stall, | |
1197 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1198 | .mode = 0644, | |
1199 | .proc_handler = proc_dointvec_minmax, | |
1200 | .extra1 = &zero, | |
1201 | .extra2 = &one, | |
1202 | }, | |
bc7a34b8 | 1203 | #endif |
6fce56ec | 1204 | { } |
1da177e4 LT |
1205 | }; |
1206 | ||
d8217f07 | 1207 | static struct ctl_table vm_table[] = { |
1da177e4 | 1208 | { |
1da177e4 LT |
1209 | .procname = "overcommit_memory", |
1210 | .data = &sysctl_overcommit_memory, | |
1211 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1212 | .mode = 0644, | |
cb16e95f PH |
1213 | .proc_handler = proc_dointvec_minmax, |
1214 | .extra1 = &zero, | |
1215 | .extra2 = &two, | |
1da177e4 | 1216 | }, |
fadd8fbd | 1217 | { |
fadd8fbd KH |
1218 | .procname = "panic_on_oom", |
1219 | .data = &sysctl_panic_on_oom, | |
1220 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1221 | .mode = 0644, | |
cb16e95f PH |
1222 | .proc_handler = proc_dointvec_minmax, |
1223 | .extra1 = &zero, | |
1224 | .extra2 = &two, | |
fadd8fbd | 1225 | }, |
fe071d7e | 1226 | { |
fe071d7e DR |
1227 | .procname = "oom_kill_allocating_task", |
1228 | .data = &sysctl_oom_kill_allocating_task, | |
1229 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1230 | .mode = 0644, | |
6d456111 | 1231 | .proc_handler = proc_dointvec, |
fe071d7e | 1232 | }, |
fef1bdd6 | 1233 | { |
fef1bdd6 DR |
1234 | .procname = "oom_dump_tasks", |
1235 | .data = &sysctl_oom_dump_tasks, | |
1236 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1237 | .mode = 0644, | |
6d456111 | 1238 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1239 | }, |
1da177e4 | 1240 | { |
1da177e4 LT |
1241 | .procname = "overcommit_ratio", |
1242 | .data = &sysctl_overcommit_ratio, | |
1243 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1244 | .mode = 0644, | |
49f0ce5f JM |
1245 | .proc_handler = overcommit_ratio_handler, |
1246 | }, | |
1247 | { | |
1248 | .procname = "overcommit_kbytes", | |
1249 | .data = &sysctl_overcommit_kbytes, | |
1250 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1251 | .mode = 0644, | |
1252 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1253 | }, |
1254 | { | |
1da177e4 LT |
1255 | .procname = "page-cluster", |
1256 | .data = &page_cluster, | |
1257 | .maxlen = sizeof(int), | |
1258 | .mode = 0644, | |
cb16e95f PH |
1259 | .proc_handler = proc_dointvec_minmax, |
1260 | .extra1 = &zero, | |
1da177e4 LT |
1261 | }, |
1262 | { | |
1da177e4 LT |
1263 | .procname = "dirty_background_ratio", |
1264 | .data = &dirty_background_ratio, | |
1265 | .maxlen = sizeof(dirty_background_ratio), | |
1266 | .mode = 0644, | |
6d456111 | 1267 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1268 | .extra1 = &zero, |
1269 | .extra2 = &one_hundred, | |
1270 | }, | |
2da02997 | 1271 | { |
2da02997 DR |
1272 | .procname = "dirty_background_bytes", |
1273 | .data = &dirty_background_bytes, | |
1274 | .maxlen = sizeof(dirty_background_bytes), | |
1275 | .mode = 0644, | |
6d456111 | 1276 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1277 | .extra1 = &one_ul, |
2da02997 | 1278 | }, |
1da177e4 | 1279 | { |
1da177e4 LT |
1280 | .procname = "dirty_ratio", |
1281 | .data = &vm_dirty_ratio, | |
1282 | .maxlen = sizeof(vm_dirty_ratio), | |
1283 | .mode = 0644, | |
6d456111 | 1284 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1285 | .extra1 = &zero, |
1286 | .extra2 = &one_hundred, | |
1287 | }, | |
2da02997 | 1288 | { |
2da02997 DR |
1289 | .procname = "dirty_bytes", |
1290 | .data = &vm_dirty_bytes, | |
1291 | .maxlen = sizeof(vm_dirty_bytes), | |
1292 | .mode = 0644, | |
6d456111 | 1293 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1294 | .extra1 = &dirty_bytes_min, |
2da02997 | 1295 | }, |
1da177e4 | 1296 | { |
1da177e4 | 1297 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1298 | .data = &dirty_writeback_interval, |
1299 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1300 | .mode = 0644, |
6d456111 | 1301 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1302 | }, |
1303 | { | |
1da177e4 | 1304 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1305 | .data = &dirty_expire_interval, |
1306 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1307 | .mode = 0644, |
cb16e95f PH |
1308 | .proc_handler = proc_dointvec_minmax, |
1309 | .extra1 = &zero, | |
1da177e4 | 1310 | }, |
1efff914 TT |
1311 | { |
1312 | .procname = "dirtytime_expire_seconds", | |
1313 | .data = &dirtytime_expire_interval, | |
1314 | .maxlen = sizeof(dirty_expire_interval), | |
1315 | .mode = 0644, | |
1316 | .proc_handler = dirtytime_interval_handler, | |
1317 | .extra1 = &zero, | |
1318 | }, | |
1da177e4 | 1319 | { |
3965c9ae WL |
1320 | .procname = "nr_pdflush_threads", |
1321 | .mode = 0444 /* read-only */, | |
1322 | .proc_handler = pdflush_proc_obsolete, | |
1da177e4 LT |
1323 | }, |
1324 | { | |
1da177e4 LT |
1325 | .procname = "swappiness", |
1326 | .data = &vm_swappiness, | |
1327 | .maxlen = sizeof(vm_swappiness), | |
1328 | .mode = 0644, | |
6d456111 | 1329 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1330 | .extra1 = &zero, |
1331 | .extra2 = &one_hundred, | |
1332 | }, | |
1333 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1334 | { |
1da177e4 | 1335 | .procname = "nr_hugepages", |
e5ff2159 | 1336 | .data = NULL, |
1da177e4 LT |
1337 | .maxlen = sizeof(unsigned long), |
1338 | .mode = 0644, | |
6d456111 | 1339 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1340 | }, |
1341 | #ifdef CONFIG_NUMA | |
1342 | { | |
1343 | .procname = "nr_hugepages_mempolicy", | |
1344 | .data = NULL, | |
1345 | .maxlen = sizeof(unsigned long), | |
1346 | .mode = 0644, | |
1347 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 LS |
1348 | }, |
1349 | #endif | |
1da177e4 | 1350 | { |
1da177e4 LT |
1351 | .procname = "hugetlb_shm_group", |
1352 | .data = &sysctl_hugetlb_shm_group, | |
1353 | .maxlen = sizeof(gid_t), | |
1354 | .mode = 0644, | |
6d456111 | 1355 | .proc_handler = proc_dointvec, |
1da177e4 | 1356 | }, |
396faf03 | 1357 | { |
396faf03 MG |
1358 | .procname = "hugepages_treat_as_movable", |
1359 | .data = &hugepages_treat_as_movable, | |
1360 | .maxlen = sizeof(int), | |
1361 | .mode = 0644, | |
86cdb465 | 1362 | .proc_handler = proc_dointvec, |
396faf03 | 1363 | }, |
d1c3fb1f | 1364 | { |
d1c3fb1f | 1365 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1366 | .data = NULL, |
1367 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1368 | .mode = 0644, |
6d456111 | 1369 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1370 | }, |
1da177e4 LT |
1371 | #endif |
1372 | { | |
1da177e4 LT |
1373 | .procname = "lowmem_reserve_ratio", |
1374 | .data = &sysctl_lowmem_reserve_ratio, | |
1375 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1376 | .mode = 0644, | |
6d456111 | 1377 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1378 | }, |
9d0243bc | 1379 | { |
9d0243bc AM |
1380 | .procname = "drop_caches", |
1381 | .data = &sysctl_drop_caches, | |
1382 | .maxlen = sizeof(int), | |
1383 | .mode = 0644, | |
1384 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1385 | .extra1 = &one, |
5509a5d2 | 1386 | .extra2 = &four, |
9d0243bc | 1387 | }, |
76ab0f53 MG |
1388 | #ifdef CONFIG_COMPACTION |
1389 | { | |
1390 | .procname = "compact_memory", | |
1391 | .data = &sysctl_compact_memory, | |
1392 | .maxlen = sizeof(int), | |
1393 | .mode = 0200, | |
1394 | .proc_handler = sysctl_compaction_handler, | |
1395 | }, | |
5e771905 MG |
1396 | { |
1397 | .procname = "extfrag_threshold", | |
1398 | .data = &sysctl_extfrag_threshold, | |
1399 | .maxlen = sizeof(int), | |
1400 | .mode = 0644, | |
1401 | .proc_handler = sysctl_extfrag_handler, | |
1402 | .extra1 = &min_extfrag_threshold, | |
1403 | .extra2 = &max_extfrag_threshold, | |
1404 | }, | |
5bbe3547 EM |
1405 | { |
1406 | .procname = "compact_unevictable_allowed", | |
1407 | .data = &sysctl_compact_unevictable_allowed, | |
1408 | .maxlen = sizeof(int), | |
1409 | .mode = 0644, | |
1410 | .proc_handler = proc_dointvec, | |
1411 | .extra1 = &zero, | |
1412 | .extra2 = &one, | |
1413 | }, | |
5e771905 | 1414 | |
76ab0f53 | 1415 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1416 | { |
1da177e4 LT |
1417 | .procname = "min_free_kbytes", |
1418 | .data = &min_free_kbytes, | |
1419 | .maxlen = sizeof(min_free_kbytes), | |
1420 | .mode = 0644, | |
6d456111 | 1421 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1422 | .extra1 = &zero, |
1423 | }, | |
795ae7a0 JW |
1424 | { |
1425 | .procname = "watermark_scale_factor", | |
1426 | .data = &watermark_scale_factor, | |
1427 | .maxlen = sizeof(watermark_scale_factor), | |
1428 | .mode = 0644, | |
1429 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1430 | .extra1 = &one, | |
1431 | .extra2 = &one_thousand, | |
1432 | }, | |
8ad4b1fb | 1433 | { |
8ad4b1fb RS |
1434 | .procname = "percpu_pagelist_fraction", |
1435 | .data = &percpu_pagelist_fraction, | |
1436 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1437 | .mode = 0644, | |
6d456111 | 1438 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1439 | .extra1 = &zero, |
8ad4b1fb | 1440 | }, |
1da177e4 LT |
1441 | #ifdef CONFIG_MMU |
1442 | { | |
1da177e4 LT |
1443 | .procname = "max_map_count", |
1444 | .data = &sysctl_max_map_count, | |
1445 | .maxlen = sizeof(sysctl_max_map_count), | |
1446 | .mode = 0644, | |
3e26120c | 1447 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1448 | .extra1 = &zero, |
1da177e4 | 1449 | }, |
dd8632a1 PM |
1450 | #else |
1451 | { | |
dd8632a1 PM |
1452 | .procname = "nr_trim_pages", |
1453 | .data = &sysctl_nr_trim_pages, | |
1454 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1455 | .mode = 0644, | |
6d456111 | 1456 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1457 | .extra1 = &zero, |
1458 | }, | |
1da177e4 LT |
1459 | #endif |
1460 | { | |
1da177e4 LT |
1461 | .procname = "laptop_mode", |
1462 | .data = &laptop_mode, | |
1463 | .maxlen = sizeof(laptop_mode), | |
1464 | .mode = 0644, | |
6d456111 | 1465 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1466 | }, |
1467 | { | |
1da177e4 LT |
1468 | .procname = "block_dump", |
1469 | .data = &block_dump, | |
1470 | .maxlen = sizeof(block_dump), | |
1471 | .mode = 0644, | |
6d456111 | 1472 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1473 | .extra1 = &zero, |
1474 | }, | |
1475 | { | |
1da177e4 LT |
1476 | .procname = "vfs_cache_pressure", |
1477 | .data = &sysctl_vfs_cache_pressure, | |
1478 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1479 | .mode = 0644, | |
6d456111 | 1480 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1481 | .extra1 = &zero, |
1482 | }, | |
1483 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1484 | { | |
1da177e4 LT |
1485 | .procname = "legacy_va_layout", |
1486 | .data = &sysctl_legacy_va_layout, | |
1487 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1488 | .mode = 0644, | |
6d456111 | 1489 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1490 | .extra1 = &zero, |
1491 | }, | |
1492 | #endif | |
1743660b CL |
1493 | #ifdef CONFIG_NUMA |
1494 | { | |
1743660b | 1495 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1496 | .data = &node_reclaim_mode, |
1497 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1498 | .mode = 0644, |
6d456111 | 1499 | .proc_handler = proc_dointvec, |
c84db23c | 1500 | .extra1 = &zero, |
1743660b | 1501 | }, |
9614634f | 1502 | { |
9614634f CL |
1503 | .procname = "min_unmapped_ratio", |
1504 | .data = &sysctl_min_unmapped_ratio, | |
1505 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1506 | .mode = 0644, | |
6d456111 | 1507 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1508 | .extra1 = &zero, |
1509 | .extra2 = &one_hundred, | |
1510 | }, | |
0ff38490 | 1511 | { |
0ff38490 CL |
1512 | .procname = "min_slab_ratio", |
1513 | .data = &sysctl_min_slab_ratio, | |
1514 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1515 | .mode = 0644, | |
6d456111 | 1516 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1517 | .extra1 = &zero, |
1518 | .extra2 = &one_hundred, | |
1519 | }, | |
e6e5494c | 1520 | #endif |
77461ab3 CL |
1521 | #ifdef CONFIG_SMP |
1522 | { | |
77461ab3 CL |
1523 | .procname = "stat_interval", |
1524 | .data = &sysctl_stat_interval, | |
1525 | .maxlen = sizeof(sysctl_stat_interval), | |
1526 | .mode = 0644, | |
6d456111 | 1527 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1528 | }, |
52b6f46b HD |
1529 | { |
1530 | .procname = "stat_refresh", | |
1531 | .data = NULL, | |
1532 | .maxlen = 0, | |
1533 | .mode = 0600, | |
1534 | .proc_handler = vmstat_refresh, | |
1535 | }, | |
77461ab3 | 1536 | #endif |
6e141546 | 1537 | #ifdef CONFIG_MMU |
ed032189 | 1538 | { |
ed032189 | 1539 | .procname = "mmap_min_addr", |
788084ab EP |
1540 | .data = &dac_mmap_min_addr, |
1541 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1542 | .mode = 0644, |
6d456111 | 1543 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1544 | }, |
6e141546 | 1545 | #endif |
f0c0b2b8 KH |
1546 | #ifdef CONFIG_NUMA |
1547 | { | |
f0c0b2b8 KH |
1548 | .procname = "numa_zonelist_order", |
1549 | .data = &numa_zonelist_order, | |
1550 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1551 | .mode = 0644, | |
6d456111 | 1552 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1553 | }, |
1554 | #endif | |
2b8232ce | 1555 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1556 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1557 | { |
e6e5494c | 1558 | .procname = "vdso_enabled", |
3d7ee969 AL |
1559 | #ifdef CONFIG_X86_32 |
1560 | .data = &vdso32_enabled, | |
1561 | .maxlen = sizeof(vdso32_enabled), | |
1562 | #else | |
e6e5494c IM |
1563 | .data = &vdso_enabled, |
1564 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1565 | #endif |
e6e5494c | 1566 | .mode = 0644, |
6d456111 | 1567 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1568 | .extra1 = &zero, |
1569 | }, | |
1da177e4 | 1570 | #endif |
195cf453 BG |
1571 | #ifdef CONFIG_HIGHMEM |
1572 | { | |
195cf453 BG |
1573 | .procname = "highmem_is_dirtyable", |
1574 | .data = &vm_highmem_is_dirtyable, | |
1575 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1576 | .mode = 0644, | |
6d456111 | 1577 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1578 | .extra1 = &zero, |
1579 | .extra2 = &one, | |
1580 | }, | |
1581 | #endif | |
6a46079c AK |
1582 | #ifdef CONFIG_MEMORY_FAILURE |
1583 | { | |
6a46079c AK |
1584 | .procname = "memory_failure_early_kill", |
1585 | .data = &sysctl_memory_failure_early_kill, | |
1586 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1587 | .mode = 0644, | |
6d456111 | 1588 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1589 | .extra1 = &zero, |
1590 | .extra2 = &one, | |
1591 | }, | |
1592 | { | |
6a46079c AK |
1593 | .procname = "memory_failure_recovery", |
1594 | .data = &sysctl_memory_failure_recovery, | |
1595 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1596 | .mode = 0644, | |
6d456111 | 1597 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1598 | .extra1 = &zero, |
1599 | .extra2 = &one, | |
1600 | }, | |
1601 | #endif | |
c9b1d098 AS |
1602 | { |
1603 | .procname = "user_reserve_kbytes", | |
1604 | .data = &sysctl_user_reserve_kbytes, | |
1605 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1606 | .mode = 0644, | |
1607 | .proc_handler = proc_doulongvec_minmax, | |
1608 | }, | |
4eeab4f5 AS |
1609 | { |
1610 | .procname = "admin_reserve_kbytes", | |
1611 | .data = &sysctl_admin_reserve_kbytes, | |
1612 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1613 | .mode = 0644, | |
1614 | .proc_handler = proc_doulongvec_minmax, | |
1615 | }, | |
d07e2259 DC |
1616 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1617 | { | |
1618 | .procname = "mmap_rnd_bits", | |
1619 | .data = &mmap_rnd_bits, | |
1620 | .maxlen = sizeof(mmap_rnd_bits), | |
1621 | .mode = 0600, | |
1622 | .proc_handler = proc_dointvec_minmax, | |
1623 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1624 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1625 | }, | |
1626 | #endif | |
1627 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1628 | { | |
1629 | .procname = "mmap_rnd_compat_bits", | |
1630 | .data = &mmap_rnd_compat_bits, | |
1631 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1632 | .mode = 0600, | |
1633 | .proc_handler = proc_dointvec_minmax, | |
1634 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1635 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1636 | }, | |
1637 | #endif | |
6fce56ec | 1638 | { } |
1da177e4 LT |
1639 | }; |
1640 | ||
d8217f07 | 1641 | static struct ctl_table fs_table[] = { |
1da177e4 | 1642 | { |
1da177e4 LT |
1643 | .procname = "inode-nr", |
1644 | .data = &inodes_stat, | |
3942c07c | 1645 | .maxlen = 2*sizeof(long), |
1da177e4 | 1646 | .mode = 0444, |
cffbc8aa | 1647 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1648 | }, |
1649 | { | |
1da177e4 LT |
1650 | .procname = "inode-state", |
1651 | .data = &inodes_stat, | |
3942c07c | 1652 | .maxlen = 7*sizeof(long), |
1da177e4 | 1653 | .mode = 0444, |
cffbc8aa | 1654 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1655 | }, |
1656 | { | |
1da177e4 LT |
1657 | .procname = "file-nr", |
1658 | .data = &files_stat, | |
518de9b3 | 1659 | .maxlen = sizeof(files_stat), |
1da177e4 | 1660 | .mode = 0444, |
6d456111 | 1661 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1662 | }, |
1663 | { | |
1da177e4 LT |
1664 | .procname = "file-max", |
1665 | .data = &files_stat.max_files, | |
518de9b3 | 1666 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1667 | .mode = 0644, |
518de9b3 | 1668 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1669 | }, |
9cfe015a | 1670 | { |
9cfe015a ED |
1671 | .procname = "nr_open", |
1672 | .data = &sysctl_nr_open, | |
9b80a184 | 1673 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1674 | .mode = 0644, |
6d456111 | 1675 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1676 | .extra1 = &sysctl_nr_open_min, |
1677 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1678 | }, |
1da177e4 | 1679 | { |
1da177e4 LT |
1680 | .procname = "dentry-state", |
1681 | .data = &dentry_stat, | |
3942c07c | 1682 | .maxlen = 6*sizeof(long), |
1da177e4 | 1683 | .mode = 0444, |
312d3ca8 | 1684 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1685 | }, |
1686 | { | |
1da177e4 LT |
1687 | .procname = "overflowuid", |
1688 | .data = &fs_overflowuid, | |
1689 | .maxlen = sizeof(int), | |
1690 | .mode = 0644, | |
6d456111 | 1691 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1692 | .extra1 = &minolduid, |
1693 | .extra2 = &maxolduid, | |
1694 | }, | |
1695 | { | |
1da177e4 LT |
1696 | .procname = "overflowgid", |
1697 | .data = &fs_overflowgid, | |
1698 | .maxlen = sizeof(int), | |
1699 | .mode = 0644, | |
6d456111 | 1700 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1701 | .extra1 = &minolduid, |
1702 | .extra2 = &maxolduid, | |
1703 | }, | |
bfcd17a6 | 1704 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1705 | { |
1da177e4 LT |
1706 | .procname = "leases-enable", |
1707 | .data = &leases_enable, | |
1708 | .maxlen = sizeof(int), | |
1709 | .mode = 0644, | |
6d456111 | 1710 | .proc_handler = proc_dointvec, |
1da177e4 | 1711 | }, |
bfcd17a6 | 1712 | #endif |
1da177e4 LT |
1713 | #ifdef CONFIG_DNOTIFY |
1714 | { | |
1da177e4 LT |
1715 | .procname = "dir-notify-enable", |
1716 | .data = &dir_notify_enable, | |
1717 | .maxlen = sizeof(int), | |
1718 | .mode = 0644, | |
6d456111 | 1719 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1720 | }, |
1721 | #endif | |
1722 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1723 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1724 | { |
1da177e4 LT |
1725 | .procname = "lease-break-time", |
1726 | .data = &lease_break_time, | |
1727 | .maxlen = sizeof(int), | |
1728 | .mode = 0644, | |
6d456111 | 1729 | .proc_handler = proc_dointvec, |
1da177e4 | 1730 | }, |
bfcd17a6 | 1731 | #endif |
ebf3f09c | 1732 | #ifdef CONFIG_AIO |
1da177e4 | 1733 | { |
1da177e4 LT |
1734 | .procname = "aio-nr", |
1735 | .data = &aio_nr, | |
1736 | .maxlen = sizeof(aio_nr), | |
1737 | .mode = 0444, | |
6d456111 | 1738 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1739 | }, |
1740 | { | |
1da177e4 LT |
1741 | .procname = "aio-max-nr", |
1742 | .data = &aio_max_nr, | |
1743 | .maxlen = sizeof(aio_max_nr), | |
1744 | .mode = 0644, | |
6d456111 | 1745 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1746 | }, |
ebf3f09c | 1747 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1748 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1749 | { |
0399cb08 RL |
1750 | .procname = "inotify", |
1751 | .mode = 0555, | |
1752 | .child = inotify_table, | |
1753 | }, | |
1754 | #endif | |
7ef9964e DL |
1755 | #ifdef CONFIG_EPOLL |
1756 | { | |
1757 | .procname = "epoll", | |
1758 | .mode = 0555, | |
1759 | .child = epoll_table, | |
1760 | }, | |
1761 | #endif | |
1da177e4 | 1762 | #endif |
800179c9 KC |
1763 | { |
1764 | .procname = "protected_symlinks", | |
1765 | .data = &sysctl_protected_symlinks, | |
1766 | .maxlen = sizeof(int), | |
1767 | .mode = 0600, | |
1768 | .proc_handler = proc_dointvec_minmax, | |
1769 | .extra1 = &zero, | |
1770 | .extra2 = &one, | |
1771 | }, | |
1772 | { | |
1773 | .procname = "protected_hardlinks", | |
1774 | .data = &sysctl_protected_hardlinks, | |
1775 | .maxlen = sizeof(int), | |
1776 | .mode = 0600, | |
1777 | .proc_handler = proc_dointvec_minmax, | |
1778 | .extra1 = &zero, | |
1779 | .extra2 = &one, | |
1780 | }, | |
d6e71144 | 1781 | { |
d6e71144 AC |
1782 | .procname = "suid_dumpable", |
1783 | .data = &suid_dumpable, | |
1784 | .maxlen = sizeof(int), | |
1785 | .mode = 0644, | |
54b50199 | 1786 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1787 | .extra1 = &zero, |
1788 | .extra2 = &two, | |
d6e71144 | 1789 | }, |
2abc26fc EB |
1790 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1791 | { | |
2abc26fc EB |
1792 | .procname = "binfmt_misc", |
1793 | .mode = 0555, | |
f9bd6733 | 1794 | .child = sysctl_mount_point, |
2abc26fc EB |
1795 | }, |
1796 | #endif | |
b492e95b | 1797 | { |
ff9da691 JA |
1798 | .procname = "pipe-max-size", |
1799 | .data = &pipe_max_size, | |
b492e95b JA |
1800 | .maxlen = sizeof(int), |
1801 | .mode = 0644, | |
ff9da691 JA |
1802 | .proc_handler = &pipe_proc_fn, |
1803 | .extra1 = &pipe_min_size, | |
b492e95b | 1804 | }, |
759c0114 WT |
1805 | { |
1806 | .procname = "pipe-user-pages-hard", | |
1807 | .data = &pipe_user_pages_hard, | |
1808 | .maxlen = sizeof(pipe_user_pages_hard), | |
1809 | .mode = 0644, | |
1810 | .proc_handler = proc_doulongvec_minmax, | |
1811 | }, | |
1812 | { | |
1813 | .procname = "pipe-user-pages-soft", | |
1814 | .data = &pipe_user_pages_soft, | |
1815 | .maxlen = sizeof(pipe_user_pages_soft), | |
1816 | .mode = 0644, | |
1817 | .proc_handler = proc_doulongvec_minmax, | |
1818 | }, | |
d2921684 EB |
1819 | { |
1820 | .procname = "mount-max", | |
1821 | .data = &sysctl_mount_max, | |
1822 | .maxlen = sizeof(unsigned int), | |
1823 | .mode = 0644, | |
1824 | .proc_handler = proc_dointvec_minmax, | |
1825 | .extra1 = &one, | |
1826 | }, | |
6fce56ec | 1827 | { } |
1da177e4 LT |
1828 | }; |
1829 | ||
d8217f07 | 1830 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1831 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1832 | { |
abd4f750 MAS |
1833 | .procname = "exception-trace", |
1834 | .data = &show_unhandled_signals, | |
1835 | .maxlen = sizeof(int), | |
1836 | .mode = 0644, | |
1837 | .proc_handler = proc_dointvec | |
1838 | }, | |
b2be84df MH |
1839 | #endif |
1840 | #if defined(CONFIG_OPTPROBES) | |
1841 | { | |
1842 | .procname = "kprobes-optimization", | |
1843 | .data = &sysctl_kprobes_optimization, | |
1844 | .maxlen = sizeof(int), | |
1845 | .mode = 0644, | |
1846 | .proc_handler = proc_kprobes_optimization_handler, | |
1847 | .extra1 = &zero, | |
1848 | .extra2 = &one, | |
1849 | }, | |
abd4f750 | 1850 | #endif |
6fce56ec | 1851 | { } |
1da177e4 LT |
1852 | }; |
1853 | ||
d8217f07 | 1854 | static struct ctl_table dev_table[] = { |
6fce56ec | 1855 | { } |
0eeca283 | 1856 | }; |
1da177e4 | 1857 | |
de4e83bd | 1858 | int __init sysctl_init(void) |
d912b0cc | 1859 | { |
fd4b616b SR |
1860 | struct ctl_table_header *hdr; |
1861 | ||
1862 | hdr = register_sysctl_table(sysctl_base_table); | |
1863 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1864 | return 0; |
1865 | } | |
1866 | ||
b89a8171 EB |
1867 | #endif /* CONFIG_SYSCTL */ |
1868 | ||
1da177e4 LT |
1869 | /* |
1870 | * /proc/sys support | |
1871 | */ | |
1872 | ||
b89a8171 | 1873 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1874 | |
f8808300 KC |
1875 | static int _proc_do_string(char *data, int maxlen, int write, |
1876 | char __user *buffer, | |
b1ba4ddd | 1877 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1878 | { |
1879 | size_t len; | |
1880 | char __user *p; | |
1881 | char c; | |
8d060877 ON |
1882 | |
1883 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1884 | *lenp = 0; |
1885 | return 0; | |
1886 | } | |
8d060877 | 1887 | |
1da177e4 | 1888 | if (write) { |
f4aacea2 KC |
1889 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1890 | /* Only continue writes not past the end of buffer. */ | |
1891 | len = strlen(data); | |
1892 | if (len > maxlen - 1) | |
1893 | len = maxlen - 1; | |
1894 | ||
1895 | if (*ppos > len) | |
1896 | return 0; | |
1897 | len = *ppos; | |
1898 | } else { | |
1899 | /* Start writing from beginning of buffer. */ | |
1900 | len = 0; | |
1901 | } | |
1902 | ||
2ca9bb45 | 1903 | *ppos += *lenp; |
1da177e4 | 1904 | p = buffer; |
2ca9bb45 | 1905 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1906 | if (get_user(c, p++)) |
1907 | return -EFAULT; | |
1908 | if (c == 0 || c == '\n') | |
1909 | break; | |
2ca9bb45 | 1910 | data[len++] = c; |
1da177e4 | 1911 | } |
f8808300 | 1912 | data[len] = 0; |
1da177e4 | 1913 | } else { |
f5dd3d6f SV |
1914 | len = strlen(data); |
1915 | if (len > maxlen) | |
1916 | len = maxlen; | |
8d060877 ON |
1917 | |
1918 | if (*ppos > len) { | |
1919 | *lenp = 0; | |
1920 | return 0; | |
1921 | } | |
1922 | ||
1923 | data += *ppos; | |
1924 | len -= *ppos; | |
1925 | ||
1da177e4 LT |
1926 | if (len > *lenp) |
1927 | len = *lenp; | |
1928 | if (len) | |
f8808300 | 1929 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1930 | return -EFAULT; |
1931 | if (len < *lenp) { | |
f8808300 | 1932 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1933 | return -EFAULT; |
1934 | len++; | |
1935 | } | |
1936 | *lenp = len; | |
1937 | *ppos += len; | |
1938 | } | |
1939 | return 0; | |
1940 | } | |
1941 | ||
f4aacea2 KC |
1942 | static void warn_sysctl_write(struct ctl_table *table) |
1943 | { | |
1944 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1945 | "This will not be supported in the future. To silence this\n" | |
1946 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1947 | current->comm, table->procname); | |
1948 | } | |
1949 | ||
f5dd3d6f SV |
1950 | /** |
1951 | * proc_dostring - read a string sysctl | |
1952 | * @table: the sysctl table | |
1953 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1954 | * @buffer: the user buffer |
1955 | * @lenp: the size of the user buffer | |
1956 | * @ppos: file position | |
1957 | * | |
1958 | * Reads/writes a string from/to the user buffer. If the kernel | |
1959 | * buffer provided is not large enough to hold the string, the | |
1960 | * string is truncated. The copied string is %NULL-terminated. | |
1961 | * If the string is being read by the user process, it is copied | |
1962 | * and a newline '\n' is added. It is truncated if the buffer is | |
1963 | * not large enough. | |
1964 | * | |
1965 | * Returns 0 on success. | |
1966 | */ | |
8d65af78 | 1967 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
1968 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1969 | { | |
f4aacea2 KC |
1970 | if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) |
1971 | warn_sysctl_write(table); | |
1972 | ||
f8808300 KC |
1973 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
1974 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
1975 | } |
1976 | ||
00b7c339 AW |
1977 | static size_t proc_skip_spaces(char **buf) |
1978 | { | |
1979 | size_t ret; | |
1980 | char *tmp = skip_spaces(*buf); | |
1981 | ret = tmp - *buf; | |
1982 | *buf = tmp; | |
1983 | return ret; | |
1984 | } | |
1985 | ||
9f977fb7 OP |
1986 | static void proc_skip_char(char **buf, size_t *size, const char v) |
1987 | { | |
1988 | while (*size) { | |
1989 | if (**buf != v) | |
1990 | break; | |
1991 | (*size)--; | |
1992 | (*buf)++; | |
1993 | } | |
1994 | } | |
1995 | ||
00b7c339 AW |
1996 | #define TMPBUFLEN 22 |
1997 | /** | |
0fc377bd | 1998 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 1999 | * |
0fc377bd RD |
2000 | * @buf: a kernel buffer |
2001 | * @size: size of the kernel buffer | |
2002 | * @val: this is where the number will be stored | |
2003 | * @neg: set to %TRUE if number is negative | |
2004 | * @perm_tr: a vector which contains the allowed trailers | |
2005 | * @perm_tr_len: size of the perm_tr vector | |
2006 | * @tr: pointer to store the trailer character | |
00b7c339 | 2007 | * |
0fc377bd RD |
2008 | * In case of success %0 is returned and @buf and @size are updated with |
2009 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2010 | * character exists (size is non-zero after returning from this | |
2011 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2012 | */ |
2013 | static int proc_get_long(char **buf, size_t *size, | |
2014 | unsigned long *val, bool *neg, | |
2015 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2016 | { | |
2017 | int len; | |
2018 | char *p, tmp[TMPBUFLEN]; | |
2019 | ||
2020 | if (!*size) | |
2021 | return -EINVAL; | |
2022 | ||
2023 | len = *size; | |
2024 | if (len > TMPBUFLEN - 1) | |
2025 | len = TMPBUFLEN - 1; | |
2026 | ||
2027 | memcpy(tmp, *buf, len); | |
2028 | ||
2029 | tmp[len] = 0; | |
2030 | p = tmp; | |
2031 | if (*p == '-' && *size > 1) { | |
2032 | *neg = true; | |
2033 | p++; | |
2034 | } else | |
2035 | *neg = false; | |
2036 | if (!isdigit(*p)) | |
2037 | return -EINVAL; | |
2038 | ||
2039 | *val = simple_strtoul(p, &p, 0); | |
2040 | ||
2041 | len = p - tmp; | |
2042 | ||
2043 | /* We don't know if the next char is whitespace thus we may accept | |
2044 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2045 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2046 | if (len == TMPBUFLEN - 1) | |
2047 | return -EINVAL; | |
2048 | ||
2049 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2050 | return -EINVAL; | |
1da177e4 | 2051 | |
00b7c339 AW |
2052 | if (tr && (len < *size)) |
2053 | *tr = *p; | |
2054 | ||
2055 | *buf += len; | |
2056 | *size -= len; | |
2057 | ||
2058 | return 0; | |
2059 | } | |
2060 | ||
2061 | /** | |
0fc377bd | 2062 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2063 | * |
0fc377bd RD |
2064 | * @buf: the user buffer |
2065 | * @size: the size of the user buffer | |
2066 | * @val: the integer to be converted | |
2067 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2068 | * |
0fc377bd RD |
2069 | * In case of success %0 is returned and @buf and @size are updated with |
2070 | * the amount of bytes written. | |
00b7c339 AW |
2071 | */ |
2072 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2073 | bool neg) | |
2074 | { | |
2075 | int len; | |
2076 | char tmp[TMPBUFLEN], *p = tmp; | |
2077 | ||
2078 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2079 | len = strlen(tmp); | |
2080 | if (len > *size) | |
2081 | len = *size; | |
2082 | if (copy_to_user(*buf, tmp, len)) | |
2083 | return -EFAULT; | |
2084 | *size -= len; | |
2085 | *buf += len; | |
2086 | return 0; | |
2087 | } | |
2088 | #undef TMPBUFLEN | |
2089 | ||
2090 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2091 | { | |
2092 | if (*size) { | |
2093 | char __user **buffer = (char __user **)buf; | |
2094 | if (put_user(c, *buffer)) | |
2095 | return -EFAULT; | |
2096 | (*size)--, (*buffer)++; | |
2097 | *buf = *buffer; | |
2098 | } | |
2099 | return 0; | |
2100 | } | |
1da177e4 | 2101 | |
00b7c339 | 2102 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2103 | int *valp, |
2104 | int write, void *data) | |
2105 | { | |
2106 | if (write) { | |
230633d1 HS |
2107 | if (*negp) { |
2108 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2109 | return -EINVAL; | |
2110 | *valp = -*lvalp; | |
2111 | } else { | |
2112 | if (*lvalp > (unsigned long) INT_MAX) | |
2113 | return -EINVAL; | |
2114 | *valp = *lvalp; | |
2115 | } | |
1da177e4 LT |
2116 | } else { |
2117 | int val = *valp; | |
2118 | if (val < 0) { | |
00b7c339 | 2119 | *negp = true; |
9a5bc726 | 2120 | *lvalp = -(unsigned long)val; |
1da177e4 | 2121 | } else { |
00b7c339 | 2122 | *negp = false; |
1da177e4 LT |
2123 | *lvalp = (unsigned long)val; |
2124 | } | |
2125 | } | |
2126 | return 0; | |
2127 | } | |
2128 | ||
e7d316a0 SAK |
2129 | static int do_proc_douintvec_conv(bool *negp, unsigned long *lvalp, |
2130 | int *valp, | |
2131 | int write, void *data) | |
2132 | { | |
2133 | if (write) { | |
2134 | if (*negp) | |
2135 | return -EINVAL; | |
425fffd8 LZ |
2136 | if (*lvalp > UINT_MAX) |
2137 | return -EINVAL; | |
e7d316a0 SAK |
2138 | *valp = *lvalp; |
2139 | } else { | |
2140 | unsigned int val = *valp; | |
5380e564 | 2141 | *negp = false; |
e7d316a0 SAK |
2142 | *lvalp = (unsigned long)val; |
2143 | } | |
2144 | return 0; | |
2145 | } | |
2146 | ||
00b7c339 AW |
2147 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2148 | ||
d8217f07 | 2149 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2150 | int write, void __user *buffer, |
fcfbd547 | 2151 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2152 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2153 | int write, void *data), |
2154 | void *data) | |
2155 | { | |
00b7c339 | 2156 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2157 | size_t left; |
70f6cbb6 | 2158 | char *kbuf = NULL, *p; |
1da177e4 | 2159 | |
00b7c339 | 2160 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2161 | *lenp = 0; |
2162 | return 0; | |
2163 | } | |
2164 | ||
fcfbd547 | 2165 | i = (int *) tbl_data; |
1da177e4 LT |
2166 | vleft = table->maxlen / sizeof(*i); |
2167 | left = *lenp; | |
2168 | ||
2169 | if (!conv) | |
2170 | conv = do_proc_dointvec_conv; | |
2171 | ||
00b7c339 | 2172 | if (write) { |
f4aacea2 KC |
2173 | if (*ppos) { |
2174 | switch (sysctl_writes_strict) { | |
2175 | case SYSCTL_WRITES_STRICT: | |
2176 | goto out; | |
2177 | case SYSCTL_WRITES_WARN: | |
2178 | warn_sysctl_write(table); | |
2179 | break; | |
2180 | default: | |
2181 | break; | |
2182 | } | |
2183 | } | |
2184 | ||
00b7c339 AW |
2185 | if (left > PAGE_SIZE - 1) |
2186 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2187 | p = kbuf = memdup_user_nul(buffer, left); |
2188 | if (IS_ERR(kbuf)) | |
2189 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2190 | } |
2191 | ||
1da177e4 | 2192 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2193 | unsigned long lval; |
2194 | bool neg; | |
1da177e4 | 2195 | |
00b7c339 | 2196 | if (write) { |
70f6cbb6 | 2197 | left -= proc_skip_spaces(&p); |
1da177e4 | 2198 | |
563b0467 O |
2199 | if (!left) |
2200 | break; | |
70f6cbb6 | 2201 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2202 | proc_wspace_sep, |
2203 | sizeof(proc_wspace_sep), NULL); | |
2204 | if (err) | |
1da177e4 | 2205 | break; |
00b7c339 AW |
2206 | if (conv(&neg, &lval, i, 1, data)) { |
2207 | err = -EINVAL; | |
1da177e4 | 2208 | break; |
00b7c339 | 2209 | } |
1da177e4 | 2210 | } else { |
00b7c339 AW |
2211 | if (conv(&neg, &lval, i, 0, data)) { |
2212 | err = -EINVAL; | |
2213 | break; | |
2214 | } | |
1da177e4 | 2215 | if (!first) |
00b7c339 AW |
2216 | err = proc_put_char(&buffer, &left, '\t'); |
2217 | if (err) | |
2218 | break; | |
2219 | err = proc_put_long(&buffer, &left, lval, neg); | |
2220 | if (err) | |
1da177e4 | 2221 | break; |
1da177e4 LT |
2222 | } |
2223 | } | |
2224 | ||
00b7c339 AW |
2225 | if (!write && !first && left && !err) |
2226 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2227 | if (write && !err && left) |
70f6cbb6 | 2228 | left -= proc_skip_spaces(&p); |
1da177e4 | 2229 | if (write) { |
70f6cbb6 | 2230 | kfree(kbuf); |
00b7c339 AW |
2231 | if (first) |
2232 | return err ? : -EINVAL; | |
1da177e4 | 2233 | } |
1da177e4 | 2234 | *lenp -= left; |
f4aacea2 | 2235 | out: |
1da177e4 | 2236 | *ppos += *lenp; |
00b7c339 | 2237 | return err; |
1da177e4 LT |
2238 | } |
2239 | ||
8d65af78 | 2240 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2241 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2242 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2243 | int write, void *data), |
2244 | void *data) | |
2245 | { | |
8d65af78 | 2246 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2247 | buffer, lenp, ppos, conv, data); |
2248 | } | |
2249 | ||
1da177e4 LT |
2250 | /** |
2251 | * proc_dointvec - read a vector of integers | |
2252 | * @table: the sysctl table | |
2253 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2254 | * @buffer: the user buffer |
2255 | * @lenp: the size of the user buffer | |
2256 | * @ppos: file position | |
2257 | * | |
2258 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2259 | * values from/to the user buffer, treated as an ASCII string. | |
2260 | * | |
2261 | * Returns 0 on success. | |
2262 | */ | |
8d65af78 | 2263 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2264 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2265 | { | |
e7d316a0 SAK |
2266 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2267 | } | |
2268 | ||
2269 | /** | |
2270 | * proc_douintvec - read a vector of unsigned integers | |
2271 | * @table: the sysctl table | |
2272 | * @write: %TRUE if this is a write to the sysctl file | |
2273 | * @buffer: the user buffer | |
2274 | * @lenp: the size of the user buffer | |
2275 | * @ppos: file position | |
2276 | * | |
2277 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2278 | * values from/to the user buffer, treated as an ASCII string. | |
2279 | * | |
2280 | * Returns 0 on success. | |
2281 | */ | |
2282 | int proc_douintvec(struct ctl_table *table, int write, | |
2283 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2284 | { | |
2285 | return do_proc_dointvec(table, write, buffer, lenp, ppos, | |
2286 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2287 | } |
2288 | ||
34f5a398 | 2289 | /* |
25ddbb18 AK |
2290 | * Taint values can only be increased |
2291 | * This means we can safely use a temporary. | |
34f5a398 | 2292 | */ |
8d65af78 | 2293 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2294 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2295 | { | |
25ddbb18 AK |
2296 | struct ctl_table t; |
2297 | unsigned long tmptaint = get_taint(); | |
2298 | int err; | |
34f5a398 | 2299 | |
91fcd412 | 2300 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2301 | return -EPERM; |
2302 | ||
25ddbb18 AK |
2303 | t = *table; |
2304 | t.data = &tmptaint; | |
8d65af78 | 2305 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2306 | if (err < 0) |
2307 | return err; | |
2308 | ||
2309 | if (write) { | |
2310 | /* | |
2311 | * Poor man's atomic or. Not worth adding a primitive | |
2312 | * to everyone's atomic.h for this | |
2313 | */ | |
2314 | int i; | |
2315 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2316 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2317 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2318 | } |
2319 | } | |
2320 | ||
2321 | return err; | |
34f5a398 TT |
2322 | } |
2323 | ||
bfdc0b49 | 2324 | #ifdef CONFIG_PRINTK |
620f6e8e | 2325 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2326 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2327 | { | |
2328 | if (write && !capable(CAP_SYS_ADMIN)) | |
2329 | return -EPERM; | |
2330 | ||
2331 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2332 | } | |
2333 | #endif | |
2334 | ||
1da177e4 LT |
2335 | struct do_proc_dointvec_minmax_conv_param { |
2336 | int *min; | |
2337 | int *max; | |
2338 | }; | |
2339 | ||
00b7c339 AW |
2340 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2341 | int *valp, | |
1da177e4 LT |
2342 | int write, void *data) |
2343 | { | |
2344 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2345 | if (write) { | |
2346 | int val = *negp ? -*lvalp : *lvalp; | |
2347 | if ((param->min && *param->min > val) || | |
2348 | (param->max && *param->max < val)) | |
2349 | return -EINVAL; | |
2350 | *valp = val; | |
2351 | } else { | |
2352 | int val = *valp; | |
2353 | if (val < 0) { | |
00b7c339 | 2354 | *negp = true; |
9a5bc726 | 2355 | *lvalp = -(unsigned long)val; |
1da177e4 | 2356 | } else { |
00b7c339 | 2357 | *negp = false; |
1da177e4 LT |
2358 | *lvalp = (unsigned long)val; |
2359 | } | |
2360 | } | |
2361 | return 0; | |
2362 | } | |
2363 | ||
2364 | /** | |
2365 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2366 | * @table: the sysctl table | |
2367 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2368 | * @buffer: the user buffer |
2369 | * @lenp: the size of the user buffer | |
2370 | * @ppos: file position | |
2371 | * | |
2372 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2373 | * values from/to the user buffer, treated as an ASCII string. | |
2374 | * | |
2375 | * This routine will ensure the values are within the range specified by | |
2376 | * table->extra1 (min) and table->extra2 (max). | |
2377 | * | |
2378 | * Returns 0 on success. | |
2379 | */ | |
8d65af78 | 2380 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2381 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2382 | { | |
2383 | struct do_proc_dointvec_minmax_conv_param param = { | |
2384 | .min = (int *) table->extra1, | |
2385 | .max = (int *) table->extra2, | |
2386 | }; | |
8d65af78 | 2387 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2388 | do_proc_dointvec_minmax_conv, ¶m); |
2389 | } | |
2390 | ||
54b50199 KC |
2391 | static void validate_coredump_safety(void) |
2392 | { | |
046d662f | 2393 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2394 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2395 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2396 | printk(KERN_WARNING |
2397 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2398 | "Pipe handler or fully qualified core dump path required.\n" | |
2399 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2400 | ); | |
54b50199 | 2401 | } |
046d662f | 2402 | #endif |
54b50199 KC |
2403 | } |
2404 | ||
2405 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2406 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2407 | { | |
2408 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2409 | if (!error) | |
2410 | validate_coredump_safety(); | |
2411 | return error; | |
2412 | } | |
2413 | ||
046d662f | 2414 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2415 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2416 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2417 | { | |
2418 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2419 | if (!error) | |
2420 | validate_coredump_safety(); | |
2421 | return error; | |
2422 | } | |
046d662f | 2423 | #endif |
54b50199 | 2424 | |
d8217f07 | 2425 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2426 | void __user *buffer, |
2427 | size_t *lenp, loff_t *ppos, | |
2428 | unsigned long convmul, | |
2429 | unsigned long convdiv) | |
2430 | { | |
00b7c339 AW |
2431 | unsigned long *i, *min, *max; |
2432 | int vleft, first = 1, err = 0; | |
00b7c339 | 2433 | size_t left; |
70f6cbb6 | 2434 | char *kbuf = NULL, *p; |
00b7c339 AW |
2435 | |
2436 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2437 | *lenp = 0; |
2438 | return 0; | |
2439 | } | |
00b7c339 | 2440 | |
fcfbd547 | 2441 | i = (unsigned long *) data; |
1da177e4 LT |
2442 | min = (unsigned long *) table->extra1; |
2443 | max = (unsigned long *) table->extra2; | |
2444 | vleft = table->maxlen / sizeof(unsigned long); | |
2445 | left = *lenp; | |
00b7c339 AW |
2446 | |
2447 | if (write) { | |
f4aacea2 KC |
2448 | if (*ppos) { |
2449 | switch (sysctl_writes_strict) { | |
2450 | case SYSCTL_WRITES_STRICT: | |
2451 | goto out; | |
2452 | case SYSCTL_WRITES_WARN: | |
2453 | warn_sysctl_write(table); | |
2454 | break; | |
2455 | default: | |
2456 | break; | |
2457 | } | |
2458 | } | |
2459 | ||
00b7c339 AW |
2460 | if (left > PAGE_SIZE - 1) |
2461 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2462 | p = kbuf = memdup_user_nul(buffer, left); |
2463 | if (IS_ERR(kbuf)) | |
2464 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2465 | } |
2466 | ||
27b3d80a | 2467 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2468 | unsigned long val; |
2469 | ||
1da177e4 | 2470 | if (write) { |
00b7c339 AW |
2471 | bool neg; |
2472 | ||
70f6cbb6 | 2473 | left -= proc_skip_spaces(&p); |
00b7c339 | 2474 | |
70f6cbb6 | 2475 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2476 | proc_wspace_sep, |
2477 | sizeof(proc_wspace_sep), NULL); | |
2478 | if (err) | |
1da177e4 LT |
2479 | break; |
2480 | if (neg) | |
1da177e4 | 2481 | continue; |
ff9f8a7c | 2482 | val = convmul * val / convdiv; |
1da177e4 LT |
2483 | if ((min && val < *min) || (max && val > *max)) |
2484 | continue; | |
2485 | *i = val; | |
2486 | } else { | |
00b7c339 | 2487 | val = convdiv * (*i) / convmul; |
7833819d | 2488 | if (!first) { |
00b7c339 | 2489 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2490 | if (err) |
2491 | break; | |
2492 | } | |
00b7c339 AW |
2493 | err = proc_put_long(&buffer, &left, val, false); |
2494 | if (err) | |
2495 | break; | |
1da177e4 LT |
2496 | } |
2497 | } | |
2498 | ||
00b7c339 AW |
2499 | if (!write && !first && left && !err) |
2500 | err = proc_put_char(&buffer, &left, '\n'); | |
2501 | if (write && !err) | |
70f6cbb6 | 2502 | left -= proc_skip_spaces(&p); |
1da177e4 | 2503 | if (write) { |
70f6cbb6 | 2504 | kfree(kbuf); |
00b7c339 AW |
2505 | if (first) |
2506 | return err ? : -EINVAL; | |
1da177e4 | 2507 | } |
1da177e4 | 2508 | *lenp -= left; |
f4aacea2 | 2509 | out: |
1da177e4 | 2510 | *ppos += *lenp; |
00b7c339 | 2511 | return err; |
1da177e4 LT |
2512 | } |
2513 | ||
d8217f07 | 2514 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2515 | void __user *buffer, |
2516 | size_t *lenp, loff_t *ppos, | |
2517 | unsigned long convmul, | |
2518 | unsigned long convdiv) | |
2519 | { | |
2520 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2521 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2522 | } |
2523 | ||
1da177e4 LT |
2524 | /** |
2525 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2526 | * @table: the sysctl table | |
2527 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2528 | * @buffer: the user buffer |
2529 | * @lenp: the size of the user buffer | |
2530 | * @ppos: file position | |
2531 | * | |
2532 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2533 | * values from/to the user buffer, treated as an ASCII string. | |
2534 | * | |
2535 | * This routine will ensure the values are within the range specified by | |
2536 | * table->extra1 (min) and table->extra2 (max). | |
2537 | * | |
2538 | * Returns 0 on success. | |
2539 | */ | |
8d65af78 | 2540 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2541 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2542 | { | |
8d65af78 | 2543 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2544 | } |
2545 | ||
2546 | /** | |
2547 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2548 | * @table: the sysctl table | |
2549 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2550 | * @buffer: the user buffer |
2551 | * @lenp: the size of the user buffer | |
2552 | * @ppos: file position | |
2553 | * | |
2554 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2555 | * values from/to the user buffer, treated as an ASCII string. The values | |
2556 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2557 | * | |
2558 | * This routine will ensure the values are within the range specified by | |
2559 | * table->extra1 (min) and table->extra2 (max). | |
2560 | * | |
2561 | * Returns 0 on success. | |
2562 | */ | |
d8217f07 | 2563 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2564 | void __user *buffer, |
2565 | size_t *lenp, loff_t *ppos) | |
2566 | { | |
8d65af78 | 2567 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2568 | lenp, ppos, HZ, 1000l); |
2569 | } | |
2570 | ||
2571 | ||
00b7c339 | 2572 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2573 | int *valp, |
2574 | int write, void *data) | |
2575 | { | |
2576 | if (write) { | |
cba9f33d BS |
2577 | if (*lvalp > LONG_MAX / HZ) |
2578 | return 1; | |
1da177e4 LT |
2579 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2580 | } else { | |
2581 | int val = *valp; | |
2582 | unsigned long lval; | |
2583 | if (val < 0) { | |
00b7c339 | 2584 | *negp = true; |
9a5bc726 | 2585 | lval = -(unsigned long)val; |
1da177e4 | 2586 | } else { |
00b7c339 | 2587 | *negp = false; |
1da177e4 LT |
2588 | lval = (unsigned long)val; |
2589 | } | |
2590 | *lvalp = lval / HZ; | |
2591 | } | |
2592 | return 0; | |
2593 | } | |
2594 | ||
00b7c339 | 2595 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2596 | int *valp, |
2597 | int write, void *data) | |
2598 | { | |
2599 | if (write) { | |
cba9f33d BS |
2600 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2601 | return 1; | |
1da177e4 LT |
2602 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2603 | } else { | |
2604 | int val = *valp; | |
2605 | unsigned long lval; | |
2606 | if (val < 0) { | |
00b7c339 | 2607 | *negp = true; |
9a5bc726 | 2608 | lval = -(unsigned long)val; |
1da177e4 | 2609 | } else { |
00b7c339 | 2610 | *negp = false; |
1da177e4 LT |
2611 | lval = (unsigned long)val; |
2612 | } | |
2613 | *lvalp = jiffies_to_clock_t(lval); | |
2614 | } | |
2615 | return 0; | |
2616 | } | |
2617 | ||
00b7c339 | 2618 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2619 | int *valp, |
2620 | int write, void *data) | |
2621 | { | |
2622 | if (write) { | |
d738ce8f FF |
2623 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2624 | ||
2625 | if (jif > INT_MAX) | |
2626 | return 1; | |
2627 | *valp = (int)jif; | |
1da177e4 LT |
2628 | } else { |
2629 | int val = *valp; | |
2630 | unsigned long lval; | |
2631 | if (val < 0) { | |
00b7c339 | 2632 | *negp = true; |
9a5bc726 | 2633 | lval = -(unsigned long)val; |
1da177e4 | 2634 | } else { |
00b7c339 | 2635 | *negp = false; |
1da177e4 LT |
2636 | lval = (unsigned long)val; |
2637 | } | |
2638 | *lvalp = jiffies_to_msecs(lval); | |
2639 | } | |
2640 | return 0; | |
2641 | } | |
2642 | ||
2643 | /** | |
2644 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2645 | * @table: the sysctl table | |
2646 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2647 | * @buffer: the user buffer |
2648 | * @lenp: the size of the user buffer | |
2649 | * @ppos: file position | |
2650 | * | |
2651 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2652 | * values from/to the user buffer, treated as an ASCII string. | |
2653 | * The values read are assumed to be in seconds, and are converted into | |
2654 | * jiffies. | |
2655 | * | |
2656 | * Returns 0 on success. | |
2657 | */ | |
8d65af78 | 2658 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2659 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2660 | { | |
8d65af78 | 2661 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2662 | do_proc_dointvec_jiffies_conv,NULL); |
2663 | } | |
2664 | ||
2665 | /** | |
2666 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2667 | * @table: the sysctl table | |
2668 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2669 | * @buffer: the user buffer |
2670 | * @lenp: the size of the user buffer | |
1e5d5331 | 2671 | * @ppos: pointer to the file position |
1da177e4 LT |
2672 | * |
2673 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2674 | * values from/to the user buffer, treated as an ASCII string. | |
2675 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2676 | * are converted into jiffies. | |
2677 | * | |
2678 | * Returns 0 on success. | |
2679 | */ | |
8d65af78 | 2680 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2681 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2682 | { | |
8d65af78 | 2683 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2684 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2685 | } | |
2686 | ||
2687 | /** | |
2688 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2689 | * @table: the sysctl table | |
2690 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2691 | * @buffer: the user buffer |
2692 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2693 | * @ppos: file position |
2694 | * @ppos: the current position in the file | |
1da177e4 LT |
2695 | * |
2696 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2697 | * values from/to the user buffer, treated as an ASCII string. | |
2698 | * The values read are assumed to be in 1/1000 seconds, and | |
2699 | * are converted into jiffies. | |
2700 | * | |
2701 | * Returns 0 on success. | |
2702 | */ | |
8d65af78 | 2703 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2704 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2705 | { | |
8d65af78 | 2706 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2707 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2708 | } | |
2709 | ||
8d65af78 | 2710 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2711 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2712 | { | |
2713 | struct pid *new_pid; | |
2714 | pid_t tmp; | |
2715 | int r; | |
2716 | ||
6c5f3e7b | 2717 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2718 | |
8d65af78 | 2719 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2720 | lenp, ppos, NULL, NULL); |
2721 | if (r || !write) | |
2722 | return r; | |
2723 | ||
2724 | new_pid = find_get_pid(tmp); | |
2725 | if (!new_pid) | |
2726 | return -ESRCH; | |
2727 | ||
2728 | put_pid(xchg(&cad_pid, new_pid)); | |
2729 | return 0; | |
2730 | } | |
2731 | ||
9f977fb7 OP |
2732 | /** |
2733 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2734 | * @table: the sysctl table | |
2735 | * @write: %TRUE if this is a write to the sysctl file | |
2736 | * @buffer: the user buffer | |
2737 | * @lenp: the size of the user buffer | |
2738 | * @ppos: file position | |
2739 | * | |
2740 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2741 | * in table->maxlen. | |
2742 | * | |
2743 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2744 | * large bitmaps may be represented in a compact manner. Writing into | |
2745 | * the file will clear the bitmap then update it with the given input. | |
2746 | * | |
2747 | * Returns 0 on success. | |
2748 | */ | |
2749 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2750 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2751 | { | |
2752 | int err = 0; | |
2753 | bool first = 1; | |
2754 | size_t left = *lenp; | |
2755 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 2756 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
2757 | unsigned long *tmp_bitmap = NULL; |
2758 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
2759 | ||
122ff243 | 2760 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
2761 | *lenp = 0; |
2762 | return 0; | |
2763 | } | |
2764 | ||
2765 | if (write) { | |
70f6cbb6 | 2766 | char *kbuf, *p; |
9f977fb7 OP |
2767 | |
2768 | if (left > PAGE_SIZE - 1) | |
2769 | left = PAGE_SIZE - 1; | |
2770 | ||
70f6cbb6 AV |
2771 | p = kbuf = memdup_user_nul(buffer, left); |
2772 | if (IS_ERR(kbuf)) | |
2773 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
2774 | |
2775 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
2776 | GFP_KERNEL); | |
2777 | if (!tmp_bitmap) { | |
70f6cbb6 | 2778 | kfree(kbuf); |
9f977fb7 OP |
2779 | return -ENOMEM; |
2780 | } | |
70f6cbb6 | 2781 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
2782 | while (!err && left) { |
2783 | unsigned long val_a, val_b; | |
2784 | bool neg; | |
2785 | ||
70f6cbb6 | 2786 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
2787 | sizeof(tr_a), &c); |
2788 | if (err) | |
2789 | break; | |
2790 | if (val_a >= bitmap_len || neg) { | |
2791 | err = -EINVAL; | |
2792 | break; | |
2793 | } | |
2794 | ||
2795 | val_b = val_a; | |
2796 | if (left) { | |
70f6cbb6 | 2797 | p++; |
9f977fb7 OP |
2798 | left--; |
2799 | } | |
2800 | ||
2801 | if (c == '-') { | |
70f6cbb6 | 2802 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
2803 | &neg, tr_b, sizeof(tr_b), |
2804 | &c); | |
2805 | if (err) | |
2806 | break; | |
2807 | if (val_b >= bitmap_len || neg || | |
2808 | val_a > val_b) { | |
2809 | err = -EINVAL; | |
2810 | break; | |
2811 | } | |
2812 | if (left) { | |
70f6cbb6 | 2813 | p++; |
9f977fb7 OP |
2814 | left--; |
2815 | } | |
2816 | } | |
2817 | ||
5a04cca6 | 2818 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 2819 | first = 0; |
70f6cbb6 | 2820 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 2821 | } |
70f6cbb6 | 2822 | kfree(kbuf); |
9f977fb7 OP |
2823 | } else { |
2824 | unsigned long bit_a, bit_b = 0; | |
2825 | ||
2826 | while (left) { | |
2827 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
2828 | if (bit_a >= bitmap_len) | |
2829 | break; | |
2830 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
2831 | bit_a + 1) - 1; | |
2832 | ||
2833 | if (!first) { | |
2834 | err = proc_put_char(&buffer, &left, ','); | |
2835 | if (err) | |
2836 | break; | |
2837 | } | |
2838 | err = proc_put_long(&buffer, &left, bit_a, false); | |
2839 | if (err) | |
2840 | break; | |
2841 | if (bit_a != bit_b) { | |
2842 | err = proc_put_char(&buffer, &left, '-'); | |
2843 | if (err) | |
2844 | break; | |
2845 | err = proc_put_long(&buffer, &left, bit_b, false); | |
2846 | if (err) | |
2847 | break; | |
2848 | } | |
2849 | ||
2850 | first = 0; bit_b++; | |
2851 | } | |
2852 | if (!err) | |
2853 | err = proc_put_char(&buffer, &left, '\n'); | |
2854 | } | |
2855 | ||
2856 | if (!err) { | |
2857 | if (write) { | |
2858 | if (*ppos) | |
2859 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
2860 | else | |
5a04cca6 | 2861 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 OP |
2862 | } |
2863 | kfree(tmp_bitmap); | |
2864 | *lenp -= left; | |
2865 | *ppos += *lenp; | |
2866 | return 0; | |
2867 | } else { | |
2868 | kfree(tmp_bitmap); | |
2869 | return err; | |
2870 | } | |
2871 | } | |
2872 | ||
55610500 | 2873 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2874 | |
8d65af78 | 2875 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
2876 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2877 | { | |
2878 | return -ENOSYS; | |
2879 | } | |
2880 | ||
8d65af78 | 2881 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 2882 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
2883 | { |
2884 | return -ENOSYS; | |
2885 | } | |
2886 | ||
e7d316a0 SAK |
2887 | int proc_douintvec(struct ctl_table *table, int write, |
2888 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2889 | { | |
2890 | return -ENOSYS; | |
2891 | } | |
2892 | ||
8d65af78 | 2893 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2894 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2895 | { | |
2896 | return -ENOSYS; | |
2897 | } | |
2898 | ||
8d65af78 | 2899 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2900 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2901 | { | |
2902 | return -ENOSYS; | |
2903 | } | |
2904 | ||
8d65af78 | 2905 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2906 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2907 | { | |
2908 | return -ENOSYS; | |
2909 | } | |
2910 | ||
8d65af78 | 2911 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2912 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2913 | { | |
2914 | return -ENOSYS; | |
2915 | } | |
2916 | ||
8d65af78 | 2917 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2918 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2919 | { | |
2920 | return -ENOSYS; | |
2921 | } | |
2922 | ||
d8217f07 | 2923 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2924 | void __user *buffer, |
2925 | size_t *lenp, loff_t *ppos) | |
2926 | { | |
2927 | return -ENOSYS; | |
2928 | } | |
2929 | ||
2930 | ||
55610500 | 2931 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 2932 | |
1da177e4 LT |
2933 | /* |
2934 | * No sense putting this after each symbol definition, twice, | |
2935 | * exception granted :-) | |
2936 | */ | |
2937 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 2938 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
2939 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
2940 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
2941 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); | |
2942 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
2943 | EXPORT_SYMBOL(proc_dostring); | |
2944 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
2945 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |