Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 | 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> |
fd4b616b | 33 | #include <linux/kmemleak.h> |
62239ac2 | 34 | #include <linux/fs.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | #include <linux/kernel.h> | |
0296b228 | 37 | #include <linux/kobject.h> |
20380731 | 38 | #include <linux/net.h> |
1da177e4 LT |
39 | #include <linux/sysrq.h> |
40 | #include <linux/highuid.h> | |
41 | #include <linux/writeback.h> | |
3fff4c42 | 42 | #include <linux/ratelimit.h> |
76ab0f53 | 43 | #include <linux/compaction.h> |
1da177e4 | 44 | #include <linux/hugetlb.h> |
1da177e4 | 45 | #include <linux/initrd.h> |
0b77f5bf | 46 | #include <linux/key.h> |
1da177e4 LT |
47 | #include <linux/times.h> |
48 | #include <linux/limits.h> | |
49 | #include <linux/dcache.h> | |
6e006701 | 50 | #include <linux/dnotify.h> |
1da177e4 | 51 | #include <linux/syscalls.h> |
c748e134 | 52 | #include <linux/vmstat.h> |
c255d844 PM |
53 | #include <linux/nfs_fs.h> |
54 | #include <linux/acpi.h> | |
10a0a8d4 | 55 | #include <linux/reboot.h> |
b0fc494f | 56 | #include <linux/ftrace.h> |
cdd6c482 | 57 | #include <linux/perf_event.h> |
b2be84df | 58 | #include <linux/kprobes.h> |
b492e95b | 59 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 60 | #include <linux/oom.h> |
17f60a7d | 61 | #include <linux/kmod.h> |
73efc039 | 62 | #include <linux/capability.h> |
40401530 | 63 | #include <linux/binfmts.h> |
cf4aebc2 | 64 | #include <linux/sched/sysctl.h> |
f7ccbae4 | 65 | #include <linux/sched/coredump.h> |
7984754b | 66 | #include <linux/kexec.h> |
1be7f75d | 67 | #include <linux/bpf.h> |
d2921684 | 68 | #include <linux/mount.h> |
1da177e4 | 69 | |
7f2923c4 CB |
70 | #include "../lib/kstrtox.h" |
71 | ||
7c0f6ba6 | 72 | #include <linux/uaccess.h> |
1da177e4 LT |
73 | #include <asm/processor.h> |
74 | ||
29cbc78b AK |
75 | #ifdef CONFIG_X86 |
76 | #include <asm/nmi.h> | |
0741f4d2 | 77 | #include <asm/stacktrace.h> |
6e7c4025 | 78 | #include <asm/io.h> |
29cbc78b | 79 | #endif |
d550bbd4 DH |
80 | #ifdef CONFIG_SPARC |
81 | #include <asm/setup.h> | |
82 | #endif | |
c55b7c3e DY |
83 | #ifdef CONFIG_BSD_PROCESS_ACCT |
84 | #include <linux/acct.h> | |
85 | #endif | |
4f0e056f DY |
86 | #ifdef CONFIG_RT_MUTEXES |
87 | #include <linux/rtmutex.h> | |
88 | #endif | |
2edf5e49 DY |
89 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
90 | #include <linux/lockdep.h> | |
91 | #endif | |
15485a46 DY |
92 | #ifdef CONFIG_CHR_DEV_SG |
93 | #include <scsi/sg.h> | |
94 | #endif | |
964c9dff AP |
95 | #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE |
96 | #include <linux/stackleak.h> | |
97 | #endif | |
58687acb | 98 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
99 | #include <linux/nmi.h> |
100 | #endif | |
101 | ||
1da177e4 LT |
102 | #if defined(CONFIG_SYSCTL) |
103 | ||
104 | /* External variables not in a header file. */ | |
d6e71144 | 105 | extern int suid_dumpable; |
046d662f AK |
106 | #ifdef CONFIG_COREDUMP |
107 | extern int core_uses_pid; | |
1da177e4 | 108 | extern char core_pattern[]; |
a293980c | 109 | extern unsigned int core_pipe_limit; |
046d662f | 110 | #endif |
1da177e4 | 111 | extern int pid_max; |
1da177e4 | 112 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 113 | extern int percpu_pagelist_fraction; |
9745512c | 114 | extern int latencytop_enabled; |
9b80a184 | 115 | extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
116 | #ifndef CONFIG_MMU |
117 | extern int sysctl_nr_trim_pages; | |
118 | #endif | |
1da177e4 | 119 | |
c4f3b63f | 120 | /* Constants used for minimum and maximum */ |
2508ce18 | 121 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
122 | static int sixty = 60; |
123 | #endif | |
124 | ||
270750db AT |
125 | static int __maybe_unused neg_one = -1; |
126 | ||
c4f3b63f | 127 | static int zero; |
cd5f9a4c LT |
128 | static int __maybe_unused one = 1; |
129 | static int __maybe_unused two = 2; | |
5509a5d2 | 130 | static int __maybe_unused four = 4; |
fc3501d4 | 131 | static unsigned long one_ul = 1; |
32a5ad9c | 132 | static unsigned long long_max = LONG_MAX; |
c4f3b63f | 133 | static int one_hundred = 100; |
795ae7a0 | 134 | static int one_thousand = 1000; |
af91322e DY |
135 | #ifdef CONFIG_PRINTK |
136 | static int ten_thousand = 10000; | |
137 | #endif | |
c5dfd78e ACM |
138 | #ifdef CONFIG_PERF_EVENTS |
139 | static int six_hundred_forty_kb = 640 * 1024; | |
140 | #endif | |
c4f3b63f | 141 | |
9e4a5bda AR |
142 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
143 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
144 | ||
1da177e4 LT |
145 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
146 | static int maxolduid = 65535; | |
147 | static int minolduid; | |
148 | ||
149 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 150 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 151 | |
a2e51445 DV |
152 | /* |
153 | * This is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs | |
154 | * and hung_task_check_interval_secs | |
155 | */ | |
80df2847 LH |
156 | #ifdef CONFIG_DETECT_HUNG_TASK |
157 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
158 | #endif | |
159 | ||
d14f1729 DY |
160 | #ifdef CONFIG_INOTIFY_USER |
161 | #include <linux/inotify.h> | |
162 | #endif | |
72c57ed5 | 163 | #ifdef CONFIG_SPARC |
1da177e4 LT |
164 | #endif |
165 | ||
166 | #ifdef __hppa__ | |
167 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
168 | #endif |
169 | ||
170 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
171 | extern int unaligned_enabled; |
172 | #endif | |
1da177e4 | 173 | |
d2b176ed | 174 | #ifdef CONFIG_IA64 |
88fc241f | 175 | extern int unaligned_dump_stack; |
d2b176ed JS |
176 | #endif |
177 | ||
b6fca725 VG |
178 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
179 | extern int no_unaligned_warning; | |
180 | #endif | |
181 | ||
d6f8ff73 | 182 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 | 183 | |
a19ac337 LR |
184 | /** |
185 | * enum sysctl_writes_mode - supported sysctl write modes | |
186 | * | |
187 | * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value | |
188 | * to be written, and multiple writes on the same sysctl file descriptor | |
189 | * will rewrite the sysctl value, regardless of file position. No warning | |
190 | * is issued when the initial position is not 0. | |
191 | * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is | |
192 | * not 0. | |
193 | * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at | |
194 | * file position 0 and the value must be fully contained in the buffer | |
195 | * sent to the write syscall. If dealing with strings respect the file | |
196 | * position, but restrict this to the max length of the buffer, anything | |
197 | * passed the max lenght will be ignored. Multiple writes will append | |
198 | * to the buffer. | |
199 | * | |
200 | * These write modes control how current file position affects the behavior of | |
201 | * updating sysctl values through the proc interface on each write. | |
202 | */ | |
203 | enum sysctl_writes_mode { | |
204 | SYSCTL_WRITES_LEGACY = -1, | |
205 | SYSCTL_WRITES_WARN = 0, | |
206 | SYSCTL_WRITES_STRICT = 1, | |
207 | }; | |
f4aacea2 | 208 | |
a19ac337 | 209 | static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 210 | |
8d65af78 | 211 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 212 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 213 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 214 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 215 | #endif |
9ec52099 | 216 | |
bfdc0b49 | 217 | #ifdef CONFIG_PRINTK |
620f6e8e | 218 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
219 | void __user *buffer, size_t *lenp, loff_t *ppos); |
220 | #endif | |
221 | ||
54b50199 KC |
222 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
223 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 224 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
225 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
226 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 227 | #endif |
319e0a21 EB |
228 | static int proc_dopipe_max_size(struct ctl_table *table, int write, |
229 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
3fcc5530 | 230 | #ifdef CONFIG_BPF_SYSCALL |
492ecee8 AS |
231 | static int proc_dointvec_minmax_bpf_stats(struct ctl_table *table, int write, |
232 | void __user *buffer, size_t *lenp, | |
233 | loff_t *ppos); | |
3fcc5530 | 234 | #endif |
54b50199 | 235 | |
97f5f0cd | 236 | #ifdef CONFIG_MAGIC_SYSRQ |
5f733e8a | 237 | /* Note: sysrq code uses its own private copy */ |
8eaede49 | 238 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 239 | |
6f8fd1d7 | 240 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
241 | void __user *buffer, size_t *lenp, |
242 | loff_t *ppos) | |
243 | { | |
244 | int error; | |
245 | ||
246 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
247 | if (error) | |
248 | return error; | |
249 | ||
250 | if (write) | |
251 | sysrq_toggle_support(__sysrq_enabled); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | #endif | |
257 | ||
d8217f07 EB |
258 | static struct ctl_table kern_table[]; |
259 | static struct ctl_table vm_table[]; | |
260 | static struct ctl_table fs_table[]; | |
261 | static struct ctl_table debug_table[]; | |
262 | static struct ctl_table dev_table[]; | |
263 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
264 | #ifdef CONFIG_EPOLL |
265 | extern struct ctl_table epoll_table[]; | |
266 | #endif | |
1da177e4 | 267 | |
ceb18132 LR |
268 | #ifdef CONFIG_FW_LOADER_USER_HELPER |
269 | extern struct ctl_table firmware_config_table[]; | |
270 | #endif | |
271 | ||
1da177e4 LT |
272 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT |
273 | int sysctl_legacy_va_layout; | |
274 | #endif | |
275 | ||
1da177e4 LT |
276 | /* The default sysctl tables: */ |
277 | ||
de4e83bd | 278 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 279 | { |
1da177e4 LT |
280 | .procname = "kernel", |
281 | .mode = 0555, | |
282 | .child = kern_table, | |
283 | }, | |
284 | { | |
1da177e4 LT |
285 | .procname = "vm", |
286 | .mode = 0555, | |
287 | .child = vm_table, | |
288 | }, | |
1da177e4 | 289 | { |
1da177e4 LT |
290 | .procname = "fs", |
291 | .mode = 0555, | |
292 | .child = fs_table, | |
293 | }, | |
294 | { | |
1da177e4 LT |
295 | .procname = "debug", |
296 | .mode = 0555, | |
297 | .child = debug_table, | |
298 | }, | |
299 | { | |
1da177e4 LT |
300 | .procname = "dev", |
301 | .mode = 0555, | |
302 | .child = dev_table, | |
303 | }, | |
6fce56ec | 304 | { } |
1da177e4 LT |
305 | }; |
306 | ||
77e54a1f | 307 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
308 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
309 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
310 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
311 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 312 | #ifdef CONFIG_SMP |
1983a922 CE |
313 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
314 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
315 | #endif /* CONFIG_SMP */ |
316 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 317 | |
5e771905 MG |
318 | #ifdef CONFIG_COMPACTION |
319 | static int min_extfrag_threshold; | |
320 | static int max_extfrag_threshold = 1000; | |
321 | #endif | |
322 | ||
d8217f07 | 323 | static struct ctl_table kern_table[] = { |
2bba22c5 | 324 | { |
2bba22c5 MG |
325 | .procname = "sched_child_runs_first", |
326 | .data = &sysctl_sched_child_runs_first, | |
327 | .maxlen = sizeof(unsigned int), | |
328 | .mode = 0644, | |
6d456111 | 329 | .proc_handler = proc_dointvec, |
2bba22c5 | 330 | }, |
77e54a1f IM |
331 | #ifdef CONFIG_SCHED_DEBUG |
332 | { | |
b2be5e96 PZ |
333 | .procname = "sched_min_granularity_ns", |
334 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
335 | .maxlen = sizeof(unsigned int), |
336 | .mode = 0644, | |
702a7c76 | 337 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
338 | .extra1 = &min_sched_granularity_ns, |
339 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 340 | }, |
21805085 | 341 | { |
21805085 PZ |
342 | .procname = "sched_latency_ns", |
343 | .data = &sysctl_sched_latency, | |
344 | .maxlen = sizeof(unsigned int), | |
345 | .mode = 0644, | |
702a7c76 | 346 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
347 | .extra1 = &min_sched_granularity_ns, |
348 | .extra2 = &max_sched_granularity_ns, | |
349 | }, | |
77e54a1f | 350 | { |
77e54a1f IM |
351 | .procname = "sched_wakeup_granularity_ns", |
352 | .data = &sysctl_sched_wakeup_granularity, | |
353 | .maxlen = sizeof(unsigned int), | |
354 | .mode = 0644, | |
702a7c76 | 355 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
356 | .extra1 = &min_wakeup_granularity_ns, |
357 | .extra2 = &max_wakeup_granularity_ns, | |
358 | }, | |
cbee9f88 | 359 | #ifdef CONFIG_SMP |
1983a922 | 360 | { |
1983a922 CE |
361 | .procname = "sched_tunable_scaling", |
362 | .data = &sysctl_sched_tunable_scaling, | |
363 | .maxlen = sizeof(enum sched_tunable_scaling), | |
364 | .mode = 0644, | |
702a7c76 | 365 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
366 | .extra1 = &min_sched_tunable_scaling, |
367 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 368 | }, |
da84d961 | 369 | { |
d00535db | 370 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
371 | .data = &sysctl_sched_migration_cost, |
372 | .maxlen = sizeof(unsigned int), | |
373 | .mode = 0644, | |
6d456111 | 374 | .proc_handler = proc_dointvec, |
da84d961 | 375 | }, |
b82d9fdd | 376 | { |
b82d9fdd PZ |
377 | .procname = "sched_nr_migrate", |
378 | .data = &sysctl_sched_nr_migrate, | |
379 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 380 | .mode = 0644, |
6d456111 | 381 | .proc_handler = proc_dointvec, |
fa85ae24 | 382 | }, |
cb251765 MG |
383 | #ifdef CONFIG_SCHEDSTATS |
384 | { | |
385 | .procname = "sched_schedstats", | |
386 | .data = NULL, | |
387 | .maxlen = sizeof(unsigned int), | |
388 | .mode = 0644, | |
389 | .proc_handler = sysctl_schedstats, | |
390 | .extra1 = &zero, | |
391 | .extra2 = &one, | |
392 | }, | |
393 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
394 | #endif /* CONFIG_SMP */ |
395 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
396 | { |
397 | .procname = "numa_balancing_scan_delay_ms", | |
398 | .data = &sysctl_numa_balancing_scan_delay, | |
399 | .maxlen = sizeof(unsigned int), | |
400 | .mode = 0644, | |
401 | .proc_handler = proc_dointvec, | |
402 | }, | |
cbee9f88 PZ |
403 | { |
404 | .procname = "numa_balancing_scan_period_min_ms", | |
405 | .data = &sysctl_numa_balancing_scan_period_min, | |
406 | .maxlen = sizeof(unsigned int), | |
407 | .mode = 0644, | |
408 | .proc_handler = proc_dointvec, | |
409 | }, | |
410 | { | |
411 | .procname = "numa_balancing_scan_period_max_ms", | |
412 | .data = &sysctl_numa_balancing_scan_period_max, | |
413 | .maxlen = sizeof(unsigned int), | |
414 | .mode = 0644, | |
415 | .proc_handler = proc_dointvec, | |
416 | }, | |
6e5fb223 PZ |
417 | { |
418 | .procname = "numa_balancing_scan_size_mb", | |
419 | .data = &sysctl_numa_balancing_scan_size, | |
420 | .maxlen = sizeof(unsigned int), | |
421 | .mode = 0644, | |
64192658 KT |
422 | .proc_handler = proc_dointvec_minmax, |
423 | .extra1 = &one, | |
6e5fb223 | 424 | }, |
54a43d54 AK |
425 | { |
426 | .procname = "numa_balancing", | |
427 | .data = NULL, /* filled in by handler */ | |
428 | .maxlen = sizeof(unsigned int), | |
429 | .mode = 0644, | |
430 | .proc_handler = sysctl_numa_balancing, | |
431 | .extra1 = &zero, | |
432 | .extra2 = &one, | |
433 | }, | |
cbee9f88 PZ |
434 | #endif /* CONFIG_NUMA_BALANCING */ |
435 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 436 | { |
9f0c1e56 PZ |
437 | .procname = "sched_rt_period_us", |
438 | .data = &sysctl_sched_rt_period, | |
439 | .maxlen = sizeof(unsigned int), | |
440 | .mode = 0644, | |
6d456111 | 441 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
442 | }, |
443 | { | |
9f0c1e56 PZ |
444 | .procname = "sched_rt_runtime_us", |
445 | .data = &sysctl_sched_rt_runtime, | |
446 | .maxlen = sizeof(int), | |
447 | .mode = 0644, | |
6d456111 | 448 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 449 | }, |
ce0dbbbb CW |
450 | { |
451 | .procname = "sched_rr_timeslice_ms", | |
975e155e | 452 | .data = &sysctl_sched_rr_timeslice, |
ce0dbbbb CW |
453 | .maxlen = sizeof(int), |
454 | .mode = 0644, | |
455 | .proc_handler = sched_rr_handler, | |
456 | }, | |
5091faa4 MG |
457 | #ifdef CONFIG_SCHED_AUTOGROUP |
458 | { | |
459 | .procname = "sched_autogroup_enabled", | |
460 | .data = &sysctl_sched_autogroup_enabled, | |
461 | .maxlen = sizeof(unsigned int), | |
462 | .mode = 0644, | |
1747b21f | 463 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
464 | .extra1 = &zero, |
465 | .extra2 = &one, | |
466 | }, | |
467 | #endif | |
ec12cb7f PT |
468 | #ifdef CONFIG_CFS_BANDWIDTH |
469 | { | |
470 | .procname = "sched_cfs_bandwidth_slice_us", | |
471 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
472 | .maxlen = sizeof(unsigned int), | |
473 | .mode = 0644, | |
474 | .proc_handler = proc_dointvec_minmax, | |
475 | .extra1 = &one, | |
476 | }, | |
477 | #endif | |
8d5d0cfb QP |
478 | #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) |
479 | { | |
480 | .procname = "sched_energy_aware", | |
481 | .data = &sysctl_sched_energy_aware, | |
482 | .maxlen = sizeof(unsigned int), | |
483 | .mode = 0644, | |
484 | .proc_handler = sched_energy_aware_handler, | |
485 | .extra1 = &zero, | |
486 | .extra2 = &one, | |
487 | }, | |
488 | #endif | |
f20786ff PZ |
489 | #ifdef CONFIG_PROVE_LOCKING |
490 | { | |
f20786ff PZ |
491 | .procname = "prove_locking", |
492 | .data = &prove_locking, | |
493 | .maxlen = sizeof(int), | |
494 | .mode = 0644, | |
6d456111 | 495 | .proc_handler = proc_dointvec, |
f20786ff PZ |
496 | }, |
497 | #endif | |
498 | #ifdef CONFIG_LOCK_STAT | |
499 | { | |
f20786ff PZ |
500 | .procname = "lock_stat", |
501 | .data = &lock_stat, | |
502 | .maxlen = sizeof(int), | |
503 | .mode = 0644, | |
6d456111 | 504 | .proc_handler = proc_dointvec, |
f20786ff | 505 | }, |
77e54a1f | 506 | #endif |
1da177e4 | 507 | { |
1da177e4 LT |
508 | .procname = "panic", |
509 | .data = &panic_timeout, | |
510 | .maxlen = sizeof(int), | |
511 | .mode = 0644, | |
6d456111 | 512 | .proc_handler = proc_dointvec, |
1da177e4 | 513 | }, |
046d662f | 514 | #ifdef CONFIG_COREDUMP |
1da177e4 | 515 | { |
1da177e4 LT |
516 | .procname = "core_uses_pid", |
517 | .data = &core_uses_pid, | |
518 | .maxlen = sizeof(int), | |
519 | .mode = 0644, | |
6d456111 | 520 | .proc_handler = proc_dointvec, |
1da177e4 LT |
521 | }, |
522 | { | |
1da177e4 LT |
523 | .procname = "core_pattern", |
524 | .data = core_pattern, | |
71ce92f3 | 525 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 526 | .mode = 0644, |
54b50199 | 527 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 528 | }, |
a293980c | 529 | { |
a293980c NH |
530 | .procname = "core_pipe_limit", |
531 | .data = &core_pipe_limit, | |
532 | .maxlen = sizeof(unsigned int), | |
533 | .mode = 0644, | |
6d456111 | 534 | .proc_handler = proc_dointvec, |
a293980c | 535 | }, |
046d662f | 536 | #endif |
34f5a398 | 537 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 538 | { |
1da177e4 | 539 | .procname = "tainted", |
25ddbb18 | 540 | .maxlen = sizeof(long), |
34f5a398 | 541 | .mode = 0644, |
6d456111 | 542 | .proc_handler = proc_taint, |
1da177e4 | 543 | }, |
f4aacea2 KC |
544 | { |
545 | .procname = "sysctl_writes_strict", | |
546 | .data = &sysctl_writes_strict, | |
547 | .maxlen = sizeof(int), | |
548 | .mode = 0644, | |
549 | .proc_handler = proc_dointvec_minmax, | |
550 | .extra1 = &neg_one, | |
551 | .extra2 = &one, | |
552 | }, | |
34f5a398 | 553 | #endif |
9745512c AV |
554 | #ifdef CONFIG_LATENCYTOP |
555 | { | |
556 | .procname = "latencytop", | |
557 | .data = &latencytop_enabled, | |
558 | .maxlen = sizeof(int), | |
559 | .mode = 0644, | |
cb251765 | 560 | .proc_handler = sysctl_latencytop, |
9745512c AV |
561 | }, |
562 | #endif | |
1da177e4 LT |
563 | #ifdef CONFIG_BLK_DEV_INITRD |
564 | { | |
1da177e4 LT |
565 | .procname = "real-root-dev", |
566 | .data = &real_root_dev, | |
567 | .maxlen = sizeof(int), | |
568 | .mode = 0644, | |
6d456111 | 569 | .proc_handler = proc_dointvec, |
1da177e4 LT |
570 | }, |
571 | #endif | |
45807a1d | 572 | { |
45807a1d IM |
573 | .procname = "print-fatal-signals", |
574 | .data = &print_fatal_signals, | |
575 | .maxlen = sizeof(int), | |
576 | .mode = 0644, | |
6d456111 | 577 | .proc_handler = proc_dointvec, |
45807a1d | 578 | }, |
72c57ed5 | 579 | #ifdef CONFIG_SPARC |
1da177e4 | 580 | { |
1da177e4 LT |
581 | .procname = "reboot-cmd", |
582 | .data = reboot_command, | |
583 | .maxlen = 256, | |
584 | .mode = 0644, | |
6d456111 | 585 | .proc_handler = proc_dostring, |
1da177e4 LT |
586 | }, |
587 | { | |
1da177e4 LT |
588 | .procname = "stop-a", |
589 | .data = &stop_a_enabled, | |
590 | .maxlen = sizeof (int), | |
591 | .mode = 0644, | |
6d456111 | 592 | .proc_handler = proc_dointvec, |
1da177e4 LT |
593 | }, |
594 | { | |
1da177e4 LT |
595 | .procname = "scons-poweroff", |
596 | .data = &scons_pwroff, | |
597 | .maxlen = sizeof (int), | |
598 | .mode = 0644, | |
6d456111 | 599 | .proc_handler = proc_dointvec, |
1da177e4 LT |
600 | }, |
601 | #endif | |
0871420f DM |
602 | #ifdef CONFIG_SPARC64 |
603 | { | |
0871420f DM |
604 | .procname = "tsb-ratio", |
605 | .data = &sysctl_tsb_ratio, | |
606 | .maxlen = sizeof (int), | |
607 | .mode = 0644, | |
6d456111 | 608 | .proc_handler = proc_dointvec, |
0871420f DM |
609 | }, |
610 | #endif | |
1da177e4 LT |
611 | #ifdef __hppa__ |
612 | { | |
1da177e4 LT |
613 | .procname = "soft-power", |
614 | .data = &pwrsw_enabled, | |
615 | .maxlen = sizeof (int), | |
616 | .mode = 0644, | |
6d456111 | 617 | .proc_handler = proc_dointvec, |
1da177e4 | 618 | }, |
bf14e3b9 VG |
619 | #endif |
620 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 621 | { |
1da177e4 LT |
622 | .procname = "unaligned-trap", |
623 | .data = &unaligned_enabled, | |
624 | .maxlen = sizeof (int), | |
625 | .mode = 0644, | |
6d456111 | 626 | .proc_handler = proc_dointvec, |
1da177e4 LT |
627 | }, |
628 | #endif | |
629 | { | |
1da177e4 LT |
630 | .procname = "ctrl-alt-del", |
631 | .data = &C_A_D, | |
632 | .maxlen = sizeof(int), | |
633 | .mode = 0644, | |
6d456111 | 634 | .proc_handler = proc_dointvec, |
1da177e4 | 635 | }, |
606576ce | 636 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 637 | { |
b0fc494f SR |
638 | .procname = "ftrace_enabled", |
639 | .data = &ftrace_enabled, | |
640 | .maxlen = sizeof(int), | |
641 | .mode = 0644, | |
6d456111 | 642 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
643 | }, |
644 | #endif | |
f38f1d2a SR |
645 | #ifdef CONFIG_STACK_TRACER |
646 | { | |
f38f1d2a SR |
647 | .procname = "stack_tracer_enabled", |
648 | .data = &stack_tracer_enabled, | |
649 | .maxlen = sizeof(int), | |
650 | .mode = 0644, | |
6d456111 | 651 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
652 | }, |
653 | #endif | |
944ac425 SR |
654 | #ifdef CONFIG_TRACING |
655 | { | |
3299b4dd | 656 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
657 | .data = &ftrace_dump_on_oops, |
658 | .maxlen = sizeof(int), | |
659 | .mode = 0644, | |
6d456111 | 660 | .proc_handler = proc_dointvec, |
944ac425 | 661 | }, |
de7edd31 SRRH |
662 | { |
663 | .procname = "traceoff_on_warning", | |
664 | .data = &__disable_trace_on_warning, | |
665 | .maxlen = sizeof(__disable_trace_on_warning), | |
666 | .mode = 0644, | |
667 | .proc_handler = proc_dointvec, | |
668 | }, | |
0daa2302 SRRH |
669 | { |
670 | .procname = "tracepoint_printk", | |
671 | .data = &tracepoint_printk, | |
672 | .maxlen = sizeof(tracepoint_printk), | |
673 | .mode = 0644, | |
42391745 | 674 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 675 | }, |
944ac425 | 676 | #endif |
2965faa5 | 677 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
678 | { |
679 | .procname = "kexec_load_disabled", | |
680 | .data = &kexec_load_disabled, | |
681 | .maxlen = sizeof(int), | |
682 | .mode = 0644, | |
683 | /* only handle a transition from default "0" to "1" */ | |
684 | .proc_handler = proc_dointvec_minmax, | |
685 | .extra1 = &one, | |
686 | .extra2 = &one, | |
687 | }, | |
688 | #endif | |
a1ef5adb | 689 | #ifdef CONFIG_MODULES |
1da177e4 | 690 | { |
1da177e4 LT |
691 | .procname = "modprobe", |
692 | .data = &modprobe_path, | |
693 | .maxlen = KMOD_PATH_LEN, | |
694 | .mode = 0644, | |
6d456111 | 695 | .proc_handler = proc_dostring, |
1da177e4 | 696 | }, |
3d43321b | 697 | { |
3d43321b KC |
698 | .procname = "modules_disabled", |
699 | .data = &modules_disabled, | |
700 | .maxlen = sizeof(int), | |
701 | .mode = 0644, | |
702 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 703 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
704 | .extra1 = &one, |
705 | .extra2 = &one, | |
706 | }, | |
1da177e4 | 707 | #endif |
86d56134 | 708 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 709 | { |
1da177e4 | 710 | .procname = "hotplug", |
312c004d KS |
711 | .data = &uevent_helper, |
712 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 713 | .mode = 0644, |
6d456111 | 714 | .proc_handler = proc_dostring, |
1da177e4 | 715 | }, |
86d56134 | 716 | #endif |
1da177e4 LT |
717 | #ifdef CONFIG_CHR_DEV_SG |
718 | { | |
1da177e4 LT |
719 | .procname = "sg-big-buff", |
720 | .data = &sg_big_buff, | |
721 | .maxlen = sizeof (int), | |
722 | .mode = 0444, | |
6d456111 | 723 | .proc_handler = proc_dointvec, |
1da177e4 LT |
724 | }, |
725 | #endif | |
726 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
727 | { | |
1da177e4 LT |
728 | .procname = "acct", |
729 | .data = &acct_parm, | |
730 | .maxlen = 3*sizeof(int), | |
731 | .mode = 0644, | |
6d456111 | 732 | .proc_handler = proc_dointvec, |
1da177e4 LT |
733 | }, |
734 | #endif | |
1da177e4 LT |
735 | #ifdef CONFIG_MAGIC_SYSRQ |
736 | { | |
1da177e4 | 737 | .procname = "sysrq", |
5d6f647f | 738 | .data = &__sysrq_enabled, |
1da177e4 LT |
739 | .maxlen = sizeof (int), |
740 | .mode = 0644, | |
97f5f0cd | 741 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
742 | }, |
743 | #endif | |
d6f8ff73 | 744 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 745 | { |
1da177e4 | 746 | .procname = "cad_pid", |
9ec52099 | 747 | .data = NULL, |
1da177e4 LT |
748 | .maxlen = sizeof (int), |
749 | .mode = 0600, | |
6d456111 | 750 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 751 | }, |
d6f8ff73 | 752 | #endif |
1da177e4 | 753 | { |
1da177e4 | 754 | .procname = "threads-max", |
16db3d3f | 755 | .data = NULL, |
1da177e4 LT |
756 | .maxlen = sizeof(int), |
757 | .mode = 0644, | |
16db3d3f | 758 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
759 | }, |
760 | { | |
1da177e4 LT |
761 | .procname = "random", |
762 | .mode = 0555, | |
763 | .child = random_table, | |
764 | }, | |
17f60a7d EP |
765 | { |
766 | .procname = "usermodehelper", | |
767 | .mode = 0555, | |
768 | .child = usermodehelper_table, | |
769 | }, | |
ceb18132 LR |
770 | #ifdef CONFIG_FW_LOADER_USER_HELPER |
771 | { | |
772 | .procname = "firmware_config", | |
773 | .mode = 0555, | |
774 | .child = firmware_config_table, | |
775 | }, | |
776 | #endif | |
1da177e4 | 777 | { |
1da177e4 LT |
778 | .procname = "overflowuid", |
779 | .data = &overflowuid, | |
780 | .maxlen = sizeof(int), | |
781 | .mode = 0644, | |
6d456111 | 782 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
783 | .extra1 = &minolduid, |
784 | .extra2 = &maxolduid, | |
785 | }, | |
786 | { | |
1da177e4 LT |
787 | .procname = "overflowgid", |
788 | .data = &overflowgid, | |
789 | .maxlen = sizeof(int), | |
790 | .mode = 0644, | |
6d456111 | 791 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
792 | .extra1 = &minolduid, |
793 | .extra2 = &maxolduid, | |
794 | }, | |
347a8dc3 | 795 | #ifdef CONFIG_S390 |
1da177e4 LT |
796 | #ifdef CONFIG_MATHEMU |
797 | { | |
1da177e4 LT |
798 | .procname = "ieee_emulation_warnings", |
799 | .data = &sysctl_ieee_emulation_warnings, | |
800 | .maxlen = sizeof(int), | |
801 | .mode = 0644, | |
6d456111 | 802 | .proc_handler = proc_dointvec, |
1da177e4 | 803 | }, |
1da177e4 LT |
804 | #endif |
805 | { | |
1da177e4 | 806 | .procname = "userprocess_debug", |
ab3c68ee | 807 | .data = &show_unhandled_signals, |
1da177e4 LT |
808 | .maxlen = sizeof(int), |
809 | .mode = 0644, | |
6d456111 | 810 | .proc_handler = proc_dointvec, |
1da177e4 LT |
811 | }, |
812 | #endif | |
813 | { | |
1da177e4 LT |
814 | .procname = "pid_max", |
815 | .data = &pid_max, | |
816 | .maxlen = sizeof (int), | |
817 | .mode = 0644, | |
6d456111 | 818 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
819 | .extra1 = &pid_max_min, |
820 | .extra2 = &pid_max_max, | |
821 | }, | |
822 | { | |
1da177e4 LT |
823 | .procname = "panic_on_oops", |
824 | .data = &panic_on_oops, | |
825 | .maxlen = sizeof(int), | |
826 | .mode = 0644, | |
6d456111 | 827 | .proc_handler = proc_dointvec, |
1da177e4 | 828 | }, |
81c9d43f FT |
829 | { |
830 | .procname = "panic_print", | |
831 | .data = &panic_print, | |
832 | .maxlen = sizeof(unsigned long), | |
833 | .mode = 0644, | |
834 | .proc_handler = proc_doulongvec_minmax, | |
835 | }, | |
7ef3d2fd JP |
836 | #if defined CONFIG_PRINTK |
837 | { | |
7ef3d2fd JP |
838 | .procname = "printk", |
839 | .data = &console_loglevel, | |
840 | .maxlen = 4*sizeof(int), | |
841 | .mode = 0644, | |
6d456111 | 842 | .proc_handler = proc_dointvec, |
7ef3d2fd | 843 | }, |
1da177e4 | 844 | { |
1da177e4 | 845 | .procname = "printk_ratelimit", |
717115e1 | 846 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
847 | .maxlen = sizeof(int), |
848 | .mode = 0644, | |
6d456111 | 849 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
850 | }, |
851 | { | |
1da177e4 | 852 | .procname = "printk_ratelimit_burst", |
717115e1 | 853 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
854 | .maxlen = sizeof(int), |
855 | .mode = 0644, | |
6d456111 | 856 | .proc_handler = proc_dointvec, |
1da177e4 | 857 | }, |
af91322e | 858 | { |
af91322e DY |
859 | .procname = "printk_delay", |
860 | .data = &printk_delay_msec, | |
861 | .maxlen = sizeof(int), | |
862 | .mode = 0644, | |
6d456111 | 863 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
864 | .extra1 = &zero, |
865 | .extra2 = &ten_thousand, | |
866 | }, | |
750afe7b BP |
867 | { |
868 | .procname = "printk_devkmsg", | |
869 | .data = devkmsg_log_str, | |
870 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
871 | .mode = 0644, | |
872 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
873 | }, | |
eaf06b24 DR |
874 | { |
875 | .procname = "dmesg_restrict", | |
876 | .data = &dmesg_restrict, | |
877 | .maxlen = sizeof(int), | |
878 | .mode = 0644, | |
620f6e8e | 879 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
880 | .extra1 = &zero, |
881 | .extra2 = &one, | |
882 | }, | |
455cd5ab DR |
883 | { |
884 | .procname = "kptr_restrict", | |
885 | .data = &kptr_restrict, | |
886 | .maxlen = sizeof(int), | |
887 | .mode = 0644, | |
620f6e8e | 888 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
889 | .extra1 = &zero, |
890 | .extra2 = &two, | |
891 | }, | |
df6e61d4 | 892 | #endif |
1da177e4 | 893 | { |
1da177e4 LT |
894 | .procname = "ngroups_max", |
895 | .data = &ngroups_max, | |
896 | .maxlen = sizeof (int), | |
897 | .mode = 0444, | |
6d456111 | 898 | .proc_handler = proc_dointvec, |
1da177e4 | 899 | }, |
73efc039 DB |
900 | { |
901 | .procname = "cap_last_cap", | |
902 | .data = (void *)&cap_last_cap, | |
903 | .maxlen = sizeof(int), | |
904 | .mode = 0444, | |
905 | .proc_handler = proc_dointvec, | |
906 | }, | |
58687acb | 907 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 908 | { |
58687acb | 909 | .procname = "watchdog", |
7feeb9cd TG |
910 | .data = &watchdog_user_enabled, |
911 | .maxlen = sizeof(int), | |
912 | .mode = 0644, | |
195daf66 | 913 | .proc_handler = proc_watchdog, |
586692a5 MSB |
914 | .extra1 = &zero, |
915 | .extra2 = &one, | |
58687acb DZ |
916 | }, |
917 | { | |
918 | .procname = "watchdog_thresh", | |
586692a5 | 919 | .data = &watchdog_thresh, |
58687acb DZ |
920 | .maxlen = sizeof(int), |
921 | .mode = 0644, | |
195daf66 | 922 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 923 | .extra1 = &zero, |
58687acb | 924 | .extra2 = &sixty, |
504d7cf1 | 925 | }, |
195daf66 UO |
926 | { |
927 | .procname = "nmi_watchdog", | |
7feeb9cd TG |
928 | .data = &nmi_watchdog_user_enabled, |
929 | .maxlen = sizeof(int), | |
51d4052b | 930 | .mode = NMI_WATCHDOG_SYSCTL_PERM, |
195daf66 UO |
931 | .proc_handler = proc_nmi_watchdog, |
932 | .extra1 = &zero, | |
195daf66 | 933 | .extra2 = &one, |
195daf66 | 934 | }, |
05a4a952 NP |
935 | { |
936 | .procname = "watchdog_cpumask", | |
937 | .data = &watchdog_cpumask_bits, | |
938 | .maxlen = NR_CPUS, | |
939 | .mode = 0644, | |
940 | .proc_handler = proc_watchdog_cpumask, | |
941 | }, | |
942 | #ifdef CONFIG_SOFTLOCKUP_DETECTOR | |
195daf66 UO |
943 | { |
944 | .procname = "soft_watchdog", | |
7feeb9cd TG |
945 | .data = &soft_watchdog_user_enabled, |
946 | .maxlen = sizeof(int), | |
947 | .mode = 0644, | |
195daf66 UO |
948 | .proc_handler = proc_soft_watchdog, |
949 | .extra1 = &zero, | |
950 | .extra2 = &one, | |
951 | }, | |
2508ce18 DZ |
952 | { |
953 | .procname = "softlockup_panic", | |
954 | .data = &softlockup_panic, | |
955 | .maxlen = sizeof(int), | |
956 | .mode = 0644, | |
957 | .proc_handler = proc_dointvec_minmax, | |
958 | .extra1 = &zero, | |
959 | .extra2 = &one, | |
960 | }, | |
05a4a952 | 961 | #ifdef CONFIG_SMP |
ac1f5912 | 962 | { |
05a4a952 NP |
963 | .procname = "softlockup_all_cpu_backtrace", |
964 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
ac1f5912 DZ |
965 | .maxlen = sizeof(int), |
966 | .mode = 0644, | |
967 | .proc_handler = proc_dointvec_minmax, | |
968 | .extra1 = &zero, | |
969 | .extra2 = &one, | |
970 | }, | |
05a4a952 | 971 | #endif /* CONFIG_SMP */ |
ac1f5912 | 972 | #endif |
05a4a952 | 973 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
ed235875 | 974 | { |
05a4a952 NP |
975 | .procname = "hardlockup_panic", |
976 | .data = &hardlockup_panic, | |
ed235875 AT |
977 | .maxlen = sizeof(int), |
978 | .mode = 0644, | |
979 | .proc_handler = proc_dointvec_minmax, | |
980 | .extra1 = &zero, | |
981 | .extra2 = &one, | |
982 | }, | |
05a4a952 | 983 | #ifdef CONFIG_SMP |
55537871 JK |
984 | { |
985 | .procname = "hardlockup_all_cpu_backtrace", | |
986 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
987 | .maxlen = sizeof(int), | |
988 | .mode = 0644, | |
989 | .proc_handler = proc_dointvec_minmax, | |
990 | .extra1 = &zero, | |
991 | .extra2 = &one, | |
992 | }, | |
ed235875 | 993 | #endif /* CONFIG_SMP */ |
5dc30558 | 994 | #endif |
05a4a952 NP |
995 | #endif |
996 | ||
5dc30558 DZ |
997 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
998 | { | |
999 | .procname = "unknown_nmi_panic", | |
1000 | .data = &unknown_nmi_panic, | |
1001 | .maxlen = sizeof (int), | |
1002 | .mode = 0644, | |
1003 | .proc_handler = proc_dointvec, | |
1004 | }, | |
504d7cf1 | 1005 | #endif |
1da177e4 | 1006 | #if defined(CONFIG_X86) |
8da5adda | 1007 | { |
8da5adda DZ |
1008 | .procname = "panic_on_unrecovered_nmi", |
1009 | .data = &panic_on_unrecovered_nmi, | |
1010 | .maxlen = sizeof(int), | |
1011 | .mode = 0644, | |
6d456111 | 1012 | .proc_handler = proc_dointvec, |
8da5adda | 1013 | }, |
5211a242 | 1014 | { |
5211a242 KG |
1015 | .procname = "panic_on_io_nmi", |
1016 | .data = &panic_on_io_nmi, | |
1017 | .maxlen = sizeof(int), | |
1018 | .mode = 0644, | |
6d456111 | 1019 | .proc_handler = proc_dointvec, |
5211a242 | 1020 | }, |
55af7796 MH |
1021 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
1022 | { | |
1023 | .procname = "panic_on_stackoverflow", | |
1024 | .data = &sysctl_panic_on_stackoverflow, | |
1025 | .maxlen = sizeof(int), | |
1026 | .mode = 0644, | |
1027 | .proc_handler = proc_dointvec, | |
1028 | }, | |
1029 | #endif | |
1da177e4 | 1030 | { |
1da177e4 LT |
1031 | .procname = "bootloader_type", |
1032 | .data = &bootloader_type, | |
1033 | .maxlen = sizeof (int), | |
1034 | .mode = 0444, | |
6d456111 | 1035 | .proc_handler = proc_dointvec, |
1da177e4 | 1036 | }, |
5031296c | 1037 | { |
5031296c PA |
1038 | .procname = "bootloader_version", |
1039 | .data = &bootloader_version, | |
1040 | .maxlen = sizeof (int), | |
1041 | .mode = 0444, | |
6d456111 | 1042 | .proc_handler = proc_dointvec, |
5031296c | 1043 | }, |
6e7c4025 | 1044 | { |
6e7c4025 IM |
1045 | .procname = "io_delay_type", |
1046 | .data = &io_delay_type, | |
1047 | .maxlen = sizeof(int), | |
1048 | .mode = 0644, | |
6d456111 | 1049 | .proc_handler = proc_dointvec, |
6e7c4025 | 1050 | }, |
1da177e4 | 1051 | #endif |
7a9166e3 | 1052 | #if defined(CONFIG_MMU) |
1da177e4 | 1053 | { |
1da177e4 LT |
1054 | .procname = "randomize_va_space", |
1055 | .data = &randomize_va_space, | |
1056 | .maxlen = sizeof(int), | |
1057 | .mode = 0644, | |
6d456111 | 1058 | .proc_handler = proc_dointvec, |
1da177e4 | 1059 | }, |
7a9166e3 | 1060 | #endif |
0152fb37 | 1061 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1062 | { |
951f22d5 MS |
1063 | .procname = "spin_retry", |
1064 | .data = &spin_retry, | |
1065 | .maxlen = sizeof (int), | |
1066 | .mode = 0644, | |
6d456111 | 1067 | .proc_handler = proc_dointvec, |
951f22d5 | 1068 | }, |
c255d844 | 1069 | #endif |
673d5b43 | 1070 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1071 | { |
c255d844 | 1072 | .procname = "acpi_video_flags", |
77afcf78 | 1073 | .data = &acpi_realmode_flags, |
c255d844 PM |
1074 | .maxlen = sizeof (unsigned long), |
1075 | .mode = 0644, | |
6d456111 | 1076 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1077 | }, |
d2b176ed | 1078 | #endif |
b6fca725 | 1079 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1080 | { |
d2b176ed JS |
1081 | .procname = "ignore-unaligned-usertrap", |
1082 | .data = &no_unaligned_warning, | |
1083 | .maxlen = sizeof (int), | |
1084 | .mode = 0644, | |
6d456111 | 1085 | .proc_handler = proc_dointvec, |
d2b176ed | 1086 | }, |
b6fca725 VG |
1087 | #endif |
1088 | #ifdef CONFIG_IA64 | |
88fc241f | 1089 | { |
88fc241f DC |
1090 | .procname = "unaligned-dump-stack", |
1091 | .data = &unaligned_dump_stack, | |
1092 | .maxlen = sizeof (int), | |
1093 | .mode = 0644, | |
6d456111 | 1094 | .proc_handler = proc_dointvec, |
88fc241f | 1095 | }, |
bebfa101 | 1096 | #endif |
e162b39a MSB |
1097 | #ifdef CONFIG_DETECT_HUNG_TASK |
1098 | { | |
e162b39a MSB |
1099 | .procname = "hung_task_panic", |
1100 | .data = &sysctl_hung_task_panic, | |
1101 | .maxlen = sizeof(int), | |
1102 | .mode = 0644, | |
6d456111 | 1103 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1104 | .extra1 = &zero, |
1105 | .extra2 = &one, | |
1106 | }, | |
82a1fcb9 | 1107 | { |
82a1fcb9 IM |
1108 | .procname = "hung_task_check_count", |
1109 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1110 | .maxlen = sizeof(int), |
82a1fcb9 | 1111 | .mode = 0644, |
cd64647f LZ |
1112 | .proc_handler = proc_dointvec_minmax, |
1113 | .extra1 = &zero, | |
82a1fcb9 IM |
1114 | }, |
1115 | { | |
82a1fcb9 IM |
1116 | .procname = "hung_task_timeout_secs", |
1117 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1118 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1119 | .mode = 0644, |
6d456111 | 1120 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1121 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 | 1122 | }, |
a2e51445 DV |
1123 | { |
1124 | .procname = "hung_task_check_interval_secs", | |
1125 | .data = &sysctl_hung_task_check_interval_secs, | |
1126 | .maxlen = sizeof(unsigned long), | |
1127 | .mode = 0644, | |
1128 | .proc_handler = proc_dohung_task_timeout_secs, | |
1129 | .extra2 = &hung_task_timeout_max, | |
1130 | }, | |
82a1fcb9 | 1131 | { |
82a1fcb9 IM |
1132 | .procname = "hung_task_warnings", |
1133 | .data = &sysctl_hung_task_warnings, | |
270750db | 1134 | .maxlen = sizeof(int), |
82a1fcb9 | 1135 | .mode = 0644, |
270750db AT |
1136 | .proc_handler = proc_dointvec_minmax, |
1137 | .extra1 = &neg_one, | |
82a1fcb9 | 1138 | }, |
c4f3b63f | 1139 | #endif |
23f78d4a IM |
1140 | #ifdef CONFIG_RT_MUTEXES |
1141 | { | |
23f78d4a IM |
1142 | .procname = "max_lock_depth", |
1143 | .data = &max_lock_depth, | |
1144 | .maxlen = sizeof(int), | |
1145 | .mode = 0644, | |
6d456111 | 1146 | .proc_handler = proc_dointvec, |
23f78d4a | 1147 | }, |
5096add8 | 1148 | #endif |
10a0a8d4 | 1149 | { |
10a0a8d4 JF |
1150 | .procname = "poweroff_cmd", |
1151 | .data = &poweroff_cmd, | |
1152 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1153 | .mode = 0644, | |
6d456111 | 1154 | .proc_handler = proc_dostring, |
10a0a8d4 | 1155 | }, |
0b77f5bf DH |
1156 | #ifdef CONFIG_KEYS |
1157 | { | |
0b77f5bf DH |
1158 | .procname = "keys", |
1159 | .mode = 0555, | |
1160 | .child = key_sysctls, | |
1161 | }, | |
1162 | #endif | |
cdd6c482 | 1163 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1164 | /* |
1165 | * User-space scripts rely on the existence of this file | |
1166 | * as a feature check for perf_events being enabled. | |
1167 | * | |
1168 | * So it's an ABI, do not remove! | |
1169 | */ | |
1ccd1549 | 1170 | { |
cdd6c482 IM |
1171 | .procname = "perf_event_paranoid", |
1172 | .data = &sysctl_perf_event_paranoid, | |
1173 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1174 | .mode = 0644, |
6d456111 | 1175 | .proc_handler = proc_dointvec, |
1ccd1549 | 1176 | }, |
c5078f78 | 1177 | { |
cdd6c482 IM |
1178 | .procname = "perf_event_mlock_kb", |
1179 | .data = &sysctl_perf_event_mlock, | |
1180 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1181 | .mode = 0644, |
6d456111 | 1182 | .proc_handler = proc_dointvec, |
c5078f78 | 1183 | }, |
a78ac325 | 1184 | { |
cdd6c482 IM |
1185 | .procname = "perf_event_max_sample_rate", |
1186 | .data = &sysctl_perf_event_sample_rate, | |
1187 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1188 | .mode = 0644, |
163ec435 | 1189 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1190 | .extra1 = &one, |
a78ac325 | 1191 | }, |
14c63f17 DH |
1192 | { |
1193 | .procname = "perf_cpu_time_max_percent", | |
1194 | .data = &sysctl_perf_cpu_time_max_percent, | |
1195 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1196 | .mode = 0644, | |
1197 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1198 | .extra1 = &zero, | |
1199 | .extra2 = &one_hundred, | |
1200 | }, | |
c5dfd78e ACM |
1201 | { |
1202 | .procname = "perf_event_max_stack", | |
a831100a | 1203 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1204 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1205 | .mode = 0644, | |
1206 | .proc_handler = perf_event_max_stack_handler, | |
1207 | .extra1 = &zero, | |
1208 | .extra2 = &six_hundred_forty_kb, | |
1209 | }, | |
c85b0334 ACM |
1210 | { |
1211 | .procname = "perf_event_max_contexts_per_stack", | |
1212 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1213 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1214 | .mode = 0644, | |
1215 | .proc_handler = perf_event_max_stack_handler, | |
1216 | .extra1 = &zero, | |
1217 | .extra2 = &one_thousand, | |
1218 | }, | |
cb684b5b | 1219 | #endif |
9e3961a0 PB |
1220 | { |
1221 | .procname = "panic_on_warn", | |
1222 | .data = &panic_on_warn, | |
1223 | .maxlen = sizeof(int), | |
1224 | .mode = 0644, | |
1225 | .proc_handler = proc_dointvec_minmax, | |
1226 | .extra1 = &zero, | |
1227 | .extra2 = &one, | |
1228 | }, | |
bc7a34b8 TG |
1229 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1230 | { | |
1231 | .procname = "timer_migration", | |
1232 | .data = &sysctl_timer_migration, | |
1233 | .maxlen = sizeof(unsigned int), | |
1234 | .mode = 0644, | |
1235 | .proc_handler = timer_migration_handler, | |
b94bf594 MJ |
1236 | .extra1 = &zero, |
1237 | .extra2 = &one, | |
bc7a34b8 | 1238 | }, |
1be7f75d AS |
1239 | #endif |
1240 | #ifdef CONFIG_BPF_SYSCALL | |
1241 | { | |
1242 | .procname = "unprivileged_bpf_disabled", | |
1243 | .data = &sysctl_unprivileged_bpf_disabled, | |
1244 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1245 | .mode = 0644, | |
1246 | /* only handle a transition from default "0" to "1" */ | |
1247 | .proc_handler = proc_dointvec_minmax, | |
1248 | .extra1 = &one, | |
1249 | .extra2 = &one, | |
1250 | }, | |
492ecee8 AS |
1251 | { |
1252 | .procname = "bpf_stats_enabled", | |
1253 | .data = &sysctl_bpf_stats_enabled, | |
1254 | .maxlen = sizeof(sysctl_bpf_stats_enabled), | |
1255 | .mode = 0644, | |
1256 | .proc_handler = proc_dointvec_minmax_bpf_stats, | |
1257 | .extra1 = &zero, | |
1258 | .extra2 = &one, | |
1259 | }, | |
3fcc5530 | 1260 | #endif |
088e9d25 DBO |
1261 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) |
1262 | { | |
1263 | .procname = "panic_on_rcu_stall", | |
1264 | .data = &sysctl_panic_on_rcu_stall, | |
1265 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1266 | .mode = 0644, | |
1267 | .proc_handler = proc_dointvec_minmax, | |
1268 | .extra1 = &zero, | |
1269 | .extra2 = &one, | |
1270 | }, | |
964c9dff AP |
1271 | #endif |
1272 | #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE | |
1273 | { | |
1274 | .procname = "stack_erasing", | |
1275 | .data = NULL, | |
1276 | .maxlen = sizeof(int), | |
1277 | .mode = 0600, | |
1278 | .proc_handler = stack_erasing_sysctl, | |
1279 | .extra1 = &zero, | |
1280 | .extra2 = &one, | |
1281 | }, | |
bc7a34b8 | 1282 | #endif |
6fce56ec | 1283 | { } |
1da177e4 LT |
1284 | }; |
1285 | ||
d8217f07 | 1286 | static struct ctl_table vm_table[] = { |
1da177e4 | 1287 | { |
1da177e4 LT |
1288 | .procname = "overcommit_memory", |
1289 | .data = &sysctl_overcommit_memory, | |
1290 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1291 | .mode = 0644, | |
cb16e95f PH |
1292 | .proc_handler = proc_dointvec_minmax, |
1293 | .extra1 = &zero, | |
1294 | .extra2 = &two, | |
1da177e4 | 1295 | }, |
fadd8fbd | 1296 | { |
fadd8fbd KH |
1297 | .procname = "panic_on_oom", |
1298 | .data = &sysctl_panic_on_oom, | |
1299 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1300 | .mode = 0644, | |
cb16e95f PH |
1301 | .proc_handler = proc_dointvec_minmax, |
1302 | .extra1 = &zero, | |
1303 | .extra2 = &two, | |
fadd8fbd | 1304 | }, |
fe071d7e | 1305 | { |
fe071d7e DR |
1306 | .procname = "oom_kill_allocating_task", |
1307 | .data = &sysctl_oom_kill_allocating_task, | |
1308 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1309 | .mode = 0644, | |
6d456111 | 1310 | .proc_handler = proc_dointvec, |
fe071d7e | 1311 | }, |
fef1bdd6 | 1312 | { |
fef1bdd6 DR |
1313 | .procname = "oom_dump_tasks", |
1314 | .data = &sysctl_oom_dump_tasks, | |
1315 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1316 | .mode = 0644, | |
6d456111 | 1317 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1318 | }, |
1da177e4 | 1319 | { |
1da177e4 LT |
1320 | .procname = "overcommit_ratio", |
1321 | .data = &sysctl_overcommit_ratio, | |
1322 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1323 | .mode = 0644, | |
49f0ce5f JM |
1324 | .proc_handler = overcommit_ratio_handler, |
1325 | }, | |
1326 | { | |
1327 | .procname = "overcommit_kbytes", | |
1328 | .data = &sysctl_overcommit_kbytes, | |
1329 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1330 | .mode = 0644, | |
1331 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1332 | }, |
1333 | { | |
1da177e4 LT |
1334 | .procname = "page-cluster", |
1335 | .data = &page_cluster, | |
1336 | .maxlen = sizeof(int), | |
1337 | .mode = 0644, | |
cb16e95f PH |
1338 | .proc_handler = proc_dointvec_minmax, |
1339 | .extra1 = &zero, | |
1da177e4 LT |
1340 | }, |
1341 | { | |
1da177e4 LT |
1342 | .procname = "dirty_background_ratio", |
1343 | .data = &dirty_background_ratio, | |
1344 | .maxlen = sizeof(dirty_background_ratio), | |
1345 | .mode = 0644, | |
6d456111 | 1346 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1347 | .extra1 = &zero, |
1348 | .extra2 = &one_hundred, | |
1349 | }, | |
2da02997 | 1350 | { |
2da02997 DR |
1351 | .procname = "dirty_background_bytes", |
1352 | .data = &dirty_background_bytes, | |
1353 | .maxlen = sizeof(dirty_background_bytes), | |
1354 | .mode = 0644, | |
6d456111 | 1355 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1356 | .extra1 = &one_ul, |
2da02997 | 1357 | }, |
1da177e4 | 1358 | { |
1da177e4 LT |
1359 | .procname = "dirty_ratio", |
1360 | .data = &vm_dirty_ratio, | |
1361 | .maxlen = sizeof(vm_dirty_ratio), | |
1362 | .mode = 0644, | |
6d456111 | 1363 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1364 | .extra1 = &zero, |
1365 | .extra2 = &one_hundred, | |
1366 | }, | |
2da02997 | 1367 | { |
2da02997 DR |
1368 | .procname = "dirty_bytes", |
1369 | .data = &vm_dirty_bytes, | |
1370 | .maxlen = sizeof(vm_dirty_bytes), | |
1371 | .mode = 0644, | |
6d456111 | 1372 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1373 | .extra1 = &dirty_bytes_min, |
2da02997 | 1374 | }, |
1da177e4 | 1375 | { |
1da177e4 | 1376 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1377 | .data = &dirty_writeback_interval, |
1378 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1379 | .mode = 0644, |
6d456111 | 1380 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1381 | }, |
1382 | { | |
1da177e4 | 1383 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1384 | .data = &dirty_expire_interval, |
1385 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1386 | .mode = 0644, |
cb16e95f PH |
1387 | .proc_handler = proc_dointvec_minmax, |
1388 | .extra1 = &zero, | |
1da177e4 | 1389 | }, |
1efff914 TT |
1390 | { |
1391 | .procname = "dirtytime_expire_seconds", | |
1392 | .data = &dirtytime_expire_interval, | |
2d87b309 | 1393 | .maxlen = sizeof(dirtytime_expire_interval), |
1efff914 TT |
1394 | .mode = 0644, |
1395 | .proc_handler = dirtytime_interval_handler, | |
1396 | .extra1 = &zero, | |
1397 | }, | |
1da177e4 | 1398 | { |
1da177e4 LT |
1399 | .procname = "swappiness", |
1400 | .data = &vm_swappiness, | |
1401 | .maxlen = sizeof(vm_swappiness), | |
1402 | .mode = 0644, | |
6d456111 | 1403 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1404 | .extra1 = &zero, |
1405 | .extra2 = &one_hundred, | |
1406 | }, | |
1407 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1408 | { |
1da177e4 | 1409 | .procname = "nr_hugepages", |
e5ff2159 | 1410 | .data = NULL, |
1da177e4 LT |
1411 | .maxlen = sizeof(unsigned long), |
1412 | .mode = 0644, | |
6d456111 | 1413 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1414 | }, |
1415 | #ifdef CONFIG_NUMA | |
1416 | { | |
1417 | .procname = "nr_hugepages_mempolicy", | |
1418 | .data = NULL, | |
1419 | .maxlen = sizeof(unsigned long), | |
1420 | .mode = 0644, | |
1421 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 | 1422 | }, |
4518085e KW |
1423 | { |
1424 | .procname = "numa_stat", | |
1425 | .data = &sysctl_vm_numa_stat, | |
1426 | .maxlen = sizeof(int), | |
1427 | .mode = 0644, | |
1428 | .proc_handler = sysctl_vm_numa_stat_handler, | |
1429 | .extra1 = &zero, | |
1430 | .extra2 = &one, | |
1431 | }, | |
06808b08 | 1432 | #endif |
1da177e4 | 1433 | { |
1da177e4 LT |
1434 | .procname = "hugetlb_shm_group", |
1435 | .data = &sysctl_hugetlb_shm_group, | |
1436 | .maxlen = sizeof(gid_t), | |
1437 | .mode = 0644, | |
6d456111 | 1438 | .proc_handler = proc_dointvec, |
1da177e4 | 1439 | }, |
d1c3fb1f | 1440 | { |
d1c3fb1f | 1441 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1442 | .data = NULL, |
1443 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1444 | .mode = 0644, |
6d456111 | 1445 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1446 | }, |
1da177e4 LT |
1447 | #endif |
1448 | { | |
1da177e4 LT |
1449 | .procname = "lowmem_reserve_ratio", |
1450 | .data = &sysctl_lowmem_reserve_ratio, | |
1451 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1452 | .mode = 0644, | |
6d456111 | 1453 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1454 | }, |
9d0243bc | 1455 | { |
9d0243bc AM |
1456 | .procname = "drop_caches", |
1457 | .data = &sysctl_drop_caches, | |
1458 | .maxlen = sizeof(int), | |
1459 | .mode = 0644, | |
1460 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1461 | .extra1 = &one, |
5509a5d2 | 1462 | .extra2 = &four, |
9d0243bc | 1463 | }, |
76ab0f53 MG |
1464 | #ifdef CONFIG_COMPACTION |
1465 | { | |
1466 | .procname = "compact_memory", | |
1467 | .data = &sysctl_compact_memory, | |
1468 | .maxlen = sizeof(int), | |
1469 | .mode = 0200, | |
1470 | .proc_handler = sysctl_compaction_handler, | |
1471 | }, | |
5e771905 MG |
1472 | { |
1473 | .procname = "extfrag_threshold", | |
1474 | .data = &sysctl_extfrag_threshold, | |
1475 | .maxlen = sizeof(int), | |
1476 | .mode = 0644, | |
6b7e5cad | 1477 | .proc_handler = proc_dointvec_minmax, |
5e771905 MG |
1478 | .extra1 = &min_extfrag_threshold, |
1479 | .extra2 = &max_extfrag_threshold, | |
1480 | }, | |
5bbe3547 EM |
1481 | { |
1482 | .procname = "compact_unevictable_allowed", | |
1483 | .data = &sysctl_compact_unevictable_allowed, | |
1484 | .maxlen = sizeof(int), | |
1485 | .mode = 0644, | |
1486 | .proc_handler = proc_dointvec, | |
1487 | .extra1 = &zero, | |
1488 | .extra2 = &one, | |
1489 | }, | |
5e771905 | 1490 | |
76ab0f53 | 1491 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1492 | { |
1da177e4 LT |
1493 | .procname = "min_free_kbytes", |
1494 | .data = &min_free_kbytes, | |
1495 | .maxlen = sizeof(min_free_kbytes), | |
1496 | .mode = 0644, | |
6d456111 | 1497 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1498 | .extra1 = &zero, |
1499 | }, | |
1c30844d MG |
1500 | { |
1501 | .procname = "watermark_boost_factor", | |
1502 | .data = &watermark_boost_factor, | |
1503 | .maxlen = sizeof(watermark_boost_factor), | |
1504 | .mode = 0644, | |
1505 | .proc_handler = watermark_boost_factor_sysctl_handler, | |
1506 | .extra1 = &zero, | |
1507 | }, | |
795ae7a0 JW |
1508 | { |
1509 | .procname = "watermark_scale_factor", | |
1510 | .data = &watermark_scale_factor, | |
1511 | .maxlen = sizeof(watermark_scale_factor), | |
1512 | .mode = 0644, | |
1513 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1514 | .extra1 = &one, | |
1515 | .extra2 = &one_thousand, | |
1516 | }, | |
8ad4b1fb | 1517 | { |
8ad4b1fb RS |
1518 | .procname = "percpu_pagelist_fraction", |
1519 | .data = &percpu_pagelist_fraction, | |
1520 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1521 | .mode = 0644, | |
6d456111 | 1522 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1523 | .extra1 = &zero, |
8ad4b1fb | 1524 | }, |
1da177e4 LT |
1525 | #ifdef CONFIG_MMU |
1526 | { | |
1da177e4 LT |
1527 | .procname = "max_map_count", |
1528 | .data = &sysctl_max_map_count, | |
1529 | .maxlen = sizeof(sysctl_max_map_count), | |
1530 | .mode = 0644, | |
3e26120c | 1531 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1532 | .extra1 = &zero, |
1da177e4 | 1533 | }, |
dd8632a1 PM |
1534 | #else |
1535 | { | |
dd8632a1 PM |
1536 | .procname = "nr_trim_pages", |
1537 | .data = &sysctl_nr_trim_pages, | |
1538 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1539 | .mode = 0644, | |
6d456111 | 1540 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1541 | .extra1 = &zero, |
1542 | }, | |
1da177e4 LT |
1543 | #endif |
1544 | { | |
1da177e4 LT |
1545 | .procname = "laptop_mode", |
1546 | .data = &laptop_mode, | |
1547 | .maxlen = sizeof(laptop_mode), | |
1548 | .mode = 0644, | |
6d456111 | 1549 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1550 | }, |
1551 | { | |
1da177e4 LT |
1552 | .procname = "block_dump", |
1553 | .data = &block_dump, | |
1554 | .maxlen = sizeof(block_dump), | |
1555 | .mode = 0644, | |
6d456111 | 1556 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1557 | .extra1 = &zero, |
1558 | }, | |
1559 | { | |
1da177e4 LT |
1560 | .procname = "vfs_cache_pressure", |
1561 | .data = &sysctl_vfs_cache_pressure, | |
1562 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1563 | .mode = 0644, | |
6d456111 | 1564 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1565 | .extra1 = &zero, |
1566 | }, | |
1567 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1568 | { | |
1da177e4 LT |
1569 | .procname = "legacy_va_layout", |
1570 | .data = &sysctl_legacy_va_layout, | |
1571 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1572 | .mode = 0644, | |
6d456111 | 1573 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1574 | .extra1 = &zero, |
1575 | }, | |
1576 | #endif | |
1743660b CL |
1577 | #ifdef CONFIG_NUMA |
1578 | { | |
1743660b | 1579 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1580 | .data = &node_reclaim_mode, |
1581 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1582 | .mode = 0644, |
6d456111 | 1583 | .proc_handler = proc_dointvec, |
c84db23c | 1584 | .extra1 = &zero, |
1743660b | 1585 | }, |
9614634f | 1586 | { |
9614634f CL |
1587 | .procname = "min_unmapped_ratio", |
1588 | .data = &sysctl_min_unmapped_ratio, | |
1589 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1590 | .mode = 0644, | |
6d456111 | 1591 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1592 | .extra1 = &zero, |
1593 | .extra2 = &one_hundred, | |
1594 | }, | |
0ff38490 | 1595 | { |
0ff38490 CL |
1596 | .procname = "min_slab_ratio", |
1597 | .data = &sysctl_min_slab_ratio, | |
1598 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1599 | .mode = 0644, | |
6d456111 | 1600 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1601 | .extra1 = &zero, |
1602 | .extra2 = &one_hundred, | |
1603 | }, | |
e6e5494c | 1604 | #endif |
77461ab3 CL |
1605 | #ifdef CONFIG_SMP |
1606 | { | |
77461ab3 CL |
1607 | .procname = "stat_interval", |
1608 | .data = &sysctl_stat_interval, | |
1609 | .maxlen = sizeof(sysctl_stat_interval), | |
1610 | .mode = 0644, | |
6d456111 | 1611 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1612 | }, |
52b6f46b HD |
1613 | { |
1614 | .procname = "stat_refresh", | |
1615 | .data = NULL, | |
1616 | .maxlen = 0, | |
1617 | .mode = 0600, | |
1618 | .proc_handler = vmstat_refresh, | |
1619 | }, | |
77461ab3 | 1620 | #endif |
6e141546 | 1621 | #ifdef CONFIG_MMU |
ed032189 | 1622 | { |
ed032189 | 1623 | .procname = "mmap_min_addr", |
788084ab EP |
1624 | .data = &dac_mmap_min_addr, |
1625 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1626 | .mode = 0644, |
6d456111 | 1627 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1628 | }, |
6e141546 | 1629 | #endif |
f0c0b2b8 KH |
1630 | #ifdef CONFIG_NUMA |
1631 | { | |
f0c0b2b8 KH |
1632 | .procname = "numa_zonelist_order", |
1633 | .data = &numa_zonelist_order, | |
1634 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1635 | .mode = 0644, | |
6d456111 | 1636 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1637 | }, |
1638 | #endif | |
2b8232ce | 1639 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1640 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1641 | { |
e6e5494c | 1642 | .procname = "vdso_enabled", |
3d7ee969 AL |
1643 | #ifdef CONFIG_X86_32 |
1644 | .data = &vdso32_enabled, | |
1645 | .maxlen = sizeof(vdso32_enabled), | |
1646 | #else | |
e6e5494c IM |
1647 | .data = &vdso_enabled, |
1648 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1649 | #endif |
e6e5494c | 1650 | .mode = 0644, |
6d456111 | 1651 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1652 | .extra1 = &zero, |
1653 | }, | |
1da177e4 | 1654 | #endif |
195cf453 BG |
1655 | #ifdef CONFIG_HIGHMEM |
1656 | { | |
195cf453 BG |
1657 | .procname = "highmem_is_dirtyable", |
1658 | .data = &vm_highmem_is_dirtyable, | |
1659 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1660 | .mode = 0644, | |
6d456111 | 1661 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1662 | .extra1 = &zero, |
1663 | .extra2 = &one, | |
1664 | }, | |
1665 | #endif | |
6a46079c AK |
1666 | #ifdef CONFIG_MEMORY_FAILURE |
1667 | { | |
6a46079c AK |
1668 | .procname = "memory_failure_early_kill", |
1669 | .data = &sysctl_memory_failure_early_kill, | |
1670 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1671 | .mode = 0644, | |
6d456111 | 1672 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1673 | .extra1 = &zero, |
1674 | .extra2 = &one, | |
1675 | }, | |
1676 | { | |
6a46079c AK |
1677 | .procname = "memory_failure_recovery", |
1678 | .data = &sysctl_memory_failure_recovery, | |
1679 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1680 | .mode = 0644, | |
6d456111 | 1681 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1682 | .extra1 = &zero, |
1683 | .extra2 = &one, | |
1684 | }, | |
1685 | #endif | |
c9b1d098 AS |
1686 | { |
1687 | .procname = "user_reserve_kbytes", | |
1688 | .data = &sysctl_user_reserve_kbytes, | |
1689 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1690 | .mode = 0644, | |
1691 | .proc_handler = proc_doulongvec_minmax, | |
1692 | }, | |
4eeab4f5 AS |
1693 | { |
1694 | .procname = "admin_reserve_kbytes", | |
1695 | .data = &sysctl_admin_reserve_kbytes, | |
1696 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1697 | .mode = 0644, | |
1698 | .proc_handler = proc_doulongvec_minmax, | |
1699 | }, | |
d07e2259 DC |
1700 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1701 | { | |
1702 | .procname = "mmap_rnd_bits", | |
1703 | .data = &mmap_rnd_bits, | |
1704 | .maxlen = sizeof(mmap_rnd_bits), | |
1705 | .mode = 0600, | |
1706 | .proc_handler = proc_dointvec_minmax, | |
1707 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1708 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1709 | }, | |
1710 | #endif | |
1711 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1712 | { | |
1713 | .procname = "mmap_rnd_compat_bits", | |
1714 | .data = &mmap_rnd_compat_bits, | |
1715 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1716 | .mode = 0600, | |
1717 | .proc_handler = proc_dointvec_minmax, | |
1718 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1719 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1720 | }, | |
1721 | #endif | |
6fce56ec | 1722 | { } |
1da177e4 LT |
1723 | }; |
1724 | ||
d8217f07 | 1725 | static struct ctl_table fs_table[] = { |
1da177e4 | 1726 | { |
1da177e4 LT |
1727 | .procname = "inode-nr", |
1728 | .data = &inodes_stat, | |
3942c07c | 1729 | .maxlen = 2*sizeof(long), |
1da177e4 | 1730 | .mode = 0444, |
cffbc8aa | 1731 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1732 | }, |
1733 | { | |
1da177e4 LT |
1734 | .procname = "inode-state", |
1735 | .data = &inodes_stat, | |
3942c07c | 1736 | .maxlen = 7*sizeof(long), |
1da177e4 | 1737 | .mode = 0444, |
cffbc8aa | 1738 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1739 | }, |
1740 | { | |
1da177e4 LT |
1741 | .procname = "file-nr", |
1742 | .data = &files_stat, | |
518de9b3 | 1743 | .maxlen = sizeof(files_stat), |
1da177e4 | 1744 | .mode = 0444, |
6d456111 | 1745 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1746 | }, |
1747 | { | |
1da177e4 LT |
1748 | .procname = "file-max", |
1749 | .data = &files_stat.max_files, | |
518de9b3 | 1750 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1751 | .mode = 0644, |
518de9b3 | 1752 | .proc_handler = proc_doulongvec_minmax, |
32a5ad9c CB |
1753 | .extra1 = &zero, |
1754 | .extra2 = &long_max, | |
1da177e4 | 1755 | }, |
9cfe015a | 1756 | { |
9cfe015a ED |
1757 | .procname = "nr_open", |
1758 | .data = &sysctl_nr_open, | |
9b80a184 | 1759 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1760 | .mode = 0644, |
6d456111 | 1761 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1762 | .extra1 = &sysctl_nr_open_min, |
1763 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1764 | }, |
1da177e4 | 1765 | { |
1da177e4 LT |
1766 | .procname = "dentry-state", |
1767 | .data = &dentry_stat, | |
3942c07c | 1768 | .maxlen = 6*sizeof(long), |
1da177e4 | 1769 | .mode = 0444, |
312d3ca8 | 1770 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1771 | }, |
1772 | { | |
1da177e4 LT |
1773 | .procname = "overflowuid", |
1774 | .data = &fs_overflowuid, | |
1775 | .maxlen = sizeof(int), | |
1776 | .mode = 0644, | |
6d456111 | 1777 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1778 | .extra1 = &minolduid, |
1779 | .extra2 = &maxolduid, | |
1780 | }, | |
1781 | { | |
1da177e4 LT |
1782 | .procname = "overflowgid", |
1783 | .data = &fs_overflowgid, | |
1784 | .maxlen = sizeof(int), | |
1785 | .mode = 0644, | |
6d456111 | 1786 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1787 | .extra1 = &minolduid, |
1788 | .extra2 = &maxolduid, | |
1789 | }, | |
bfcd17a6 | 1790 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1791 | { |
1da177e4 LT |
1792 | .procname = "leases-enable", |
1793 | .data = &leases_enable, | |
1794 | .maxlen = sizeof(int), | |
1795 | .mode = 0644, | |
6d456111 | 1796 | .proc_handler = proc_dointvec, |
1da177e4 | 1797 | }, |
bfcd17a6 | 1798 | #endif |
1da177e4 LT |
1799 | #ifdef CONFIG_DNOTIFY |
1800 | { | |
1da177e4 LT |
1801 | .procname = "dir-notify-enable", |
1802 | .data = &dir_notify_enable, | |
1803 | .maxlen = sizeof(int), | |
1804 | .mode = 0644, | |
6d456111 | 1805 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1806 | }, |
1807 | #endif | |
1808 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1809 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1810 | { |
1da177e4 LT |
1811 | .procname = "lease-break-time", |
1812 | .data = &lease_break_time, | |
1813 | .maxlen = sizeof(int), | |
1814 | .mode = 0644, | |
6d456111 | 1815 | .proc_handler = proc_dointvec, |
1da177e4 | 1816 | }, |
bfcd17a6 | 1817 | #endif |
ebf3f09c | 1818 | #ifdef CONFIG_AIO |
1da177e4 | 1819 | { |
1da177e4 LT |
1820 | .procname = "aio-nr", |
1821 | .data = &aio_nr, | |
1822 | .maxlen = sizeof(aio_nr), | |
1823 | .mode = 0444, | |
6d456111 | 1824 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1825 | }, |
1826 | { | |
1da177e4 LT |
1827 | .procname = "aio-max-nr", |
1828 | .data = &aio_max_nr, | |
1829 | .maxlen = sizeof(aio_max_nr), | |
1830 | .mode = 0644, | |
6d456111 | 1831 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1832 | }, |
ebf3f09c | 1833 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1834 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1835 | { |
0399cb08 RL |
1836 | .procname = "inotify", |
1837 | .mode = 0555, | |
1838 | .child = inotify_table, | |
1839 | }, | |
1840 | #endif | |
7ef9964e DL |
1841 | #ifdef CONFIG_EPOLL |
1842 | { | |
1843 | .procname = "epoll", | |
1844 | .mode = 0555, | |
1845 | .child = epoll_table, | |
1846 | }, | |
1847 | #endif | |
1da177e4 | 1848 | #endif |
800179c9 KC |
1849 | { |
1850 | .procname = "protected_symlinks", | |
1851 | .data = &sysctl_protected_symlinks, | |
1852 | .maxlen = sizeof(int), | |
1853 | .mode = 0600, | |
1854 | .proc_handler = proc_dointvec_minmax, | |
1855 | .extra1 = &zero, | |
1856 | .extra2 = &one, | |
1857 | }, | |
1858 | { | |
1859 | .procname = "protected_hardlinks", | |
1860 | .data = &sysctl_protected_hardlinks, | |
1861 | .maxlen = sizeof(int), | |
1862 | .mode = 0600, | |
1863 | .proc_handler = proc_dointvec_minmax, | |
1864 | .extra1 = &zero, | |
1865 | .extra2 = &one, | |
1866 | }, | |
30aba665 SM |
1867 | { |
1868 | .procname = "protected_fifos", | |
1869 | .data = &sysctl_protected_fifos, | |
1870 | .maxlen = sizeof(int), | |
1871 | .mode = 0600, | |
1872 | .proc_handler = proc_dointvec_minmax, | |
1873 | .extra1 = &zero, | |
1874 | .extra2 = &two, | |
1875 | }, | |
1876 | { | |
1877 | .procname = "protected_regular", | |
1878 | .data = &sysctl_protected_regular, | |
1879 | .maxlen = sizeof(int), | |
1880 | .mode = 0600, | |
1881 | .proc_handler = proc_dointvec_minmax, | |
1882 | .extra1 = &zero, | |
1883 | .extra2 = &two, | |
1884 | }, | |
d6e71144 | 1885 | { |
d6e71144 AC |
1886 | .procname = "suid_dumpable", |
1887 | .data = &suid_dumpable, | |
1888 | .maxlen = sizeof(int), | |
1889 | .mode = 0644, | |
54b50199 | 1890 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1891 | .extra1 = &zero, |
1892 | .extra2 = &two, | |
d6e71144 | 1893 | }, |
2abc26fc EB |
1894 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1895 | { | |
2abc26fc EB |
1896 | .procname = "binfmt_misc", |
1897 | .mode = 0555, | |
f9bd6733 | 1898 | .child = sysctl_mount_point, |
2abc26fc EB |
1899 | }, |
1900 | #endif | |
b492e95b | 1901 | { |
ff9da691 JA |
1902 | .procname = "pipe-max-size", |
1903 | .data = &pipe_max_size, | |
98159d97 | 1904 | .maxlen = sizeof(pipe_max_size), |
b492e95b | 1905 | .mode = 0644, |
319e0a21 | 1906 | .proc_handler = proc_dopipe_max_size, |
b492e95b | 1907 | }, |
759c0114 WT |
1908 | { |
1909 | .procname = "pipe-user-pages-hard", | |
1910 | .data = &pipe_user_pages_hard, | |
1911 | .maxlen = sizeof(pipe_user_pages_hard), | |
1912 | .mode = 0644, | |
1913 | .proc_handler = proc_doulongvec_minmax, | |
1914 | }, | |
1915 | { | |
1916 | .procname = "pipe-user-pages-soft", | |
1917 | .data = &pipe_user_pages_soft, | |
1918 | .maxlen = sizeof(pipe_user_pages_soft), | |
1919 | .mode = 0644, | |
1920 | .proc_handler = proc_doulongvec_minmax, | |
1921 | }, | |
d2921684 EB |
1922 | { |
1923 | .procname = "mount-max", | |
1924 | .data = &sysctl_mount_max, | |
1925 | .maxlen = sizeof(unsigned int), | |
1926 | .mode = 0644, | |
1927 | .proc_handler = proc_dointvec_minmax, | |
1928 | .extra1 = &one, | |
1929 | }, | |
6fce56ec | 1930 | { } |
1da177e4 LT |
1931 | }; |
1932 | ||
d8217f07 | 1933 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1934 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1935 | { |
abd4f750 MAS |
1936 | .procname = "exception-trace", |
1937 | .data = &show_unhandled_signals, | |
1938 | .maxlen = sizeof(int), | |
1939 | .mode = 0644, | |
1940 | .proc_handler = proc_dointvec | |
1941 | }, | |
b2be84df MH |
1942 | #endif |
1943 | #if defined(CONFIG_OPTPROBES) | |
1944 | { | |
1945 | .procname = "kprobes-optimization", | |
1946 | .data = &sysctl_kprobes_optimization, | |
1947 | .maxlen = sizeof(int), | |
1948 | .mode = 0644, | |
1949 | .proc_handler = proc_kprobes_optimization_handler, | |
1950 | .extra1 = &zero, | |
1951 | .extra2 = &one, | |
1952 | }, | |
abd4f750 | 1953 | #endif |
6fce56ec | 1954 | { } |
1da177e4 LT |
1955 | }; |
1956 | ||
d8217f07 | 1957 | static struct ctl_table dev_table[] = { |
6fce56ec | 1958 | { } |
0eeca283 | 1959 | }; |
1da177e4 | 1960 | |
de4e83bd | 1961 | int __init sysctl_init(void) |
d912b0cc | 1962 | { |
fd4b616b SR |
1963 | struct ctl_table_header *hdr; |
1964 | ||
1965 | hdr = register_sysctl_table(sysctl_base_table); | |
1966 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1967 | return 0; |
1968 | } | |
1969 | ||
b89a8171 EB |
1970 | #endif /* CONFIG_SYSCTL */ |
1971 | ||
1da177e4 LT |
1972 | /* |
1973 | * /proc/sys support | |
1974 | */ | |
1975 | ||
b89a8171 | 1976 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1977 | |
f8808300 KC |
1978 | static int _proc_do_string(char *data, int maxlen, int write, |
1979 | char __user *buffer, | |
b1ba4ddd | 1980 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1981 | { |
1982 | size_t len; | |
1983 | char __user *p; | |
1984 | char c; | |
8d060877 ON |
1985 | |
1986 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1987 | *lenp = 0; |
1988 | return 0; | |
1989 | } | |
8d060877 | 1990 | |
1da177e4 | 1991 | if (write) { |
f4aacea2 KC |
1992 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1993 | /* Only continue writes not past the end of buffer. */ | |
1994 | len = strlen(data); | |
1995 | if (len > maxlen - 1) | |
1996 | len = maxlen - 1; | |
1997 | ||
1998 | if (*ppos > len) | |
1999 | return 0; | |
2000 | len = *ppos; | |
2001 | } else { | |
2002 | /* Start writing from beginning of buffer. */ | |
2003 | len = 0; | |
2004 | } | |
2005 | ||
2ca9bb45 | 2006 | *ppos += *lenp; |
1da177e4 | 2007 | p = buffer; |
2ca9bb45 | 2008 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
2009 | if (get_user(c, p++)) |
2010 | return -EFAULT; | |
2011 | if (c == 0 || c == '\n') | |
2012 | break; | |
2ca9bb45 | 2013 | data[len++] = c; |
1da177e4 | 2014 | } |
f8808300 | 2015 | data[len] = 0; |
1da177e4 | 2016 | } else { |
f5dd3d6f SV |
2017 | len = strlen(data); |
2018 | if (len > maxlen) | |
2019 | len = maxlen; | |
8d060877 ON |
2020 | |
2021 | if (*ppos > len) { | |
2022 | *lenp = 0; | |
2023 | return 0; | |
2024 | } | |
2025 | ||
2026 | data += *ppos; | |
2027 | len -= *ppos; | |
2028 | ||
1da177e4 LT |
2029 | if (len > *lenp) |
2030 | len = *lenp; | |
2031 | if (len) | |
f8808300 | 2032 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
2033 | return -EFAULT; |
2034 | if (len < *lenp) { | |
f8808300 | 2035 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
2036 | return -EFAULT; |
2037 | len++; | |
2038 | } | |
2039 | *lenp = len; | |
2040 | *ppos += len; | |
2041 | } | |
2042 | return 0; | |
2043 | } | |
2044 | ||
f4aacea2 KC |
2045 | static void warn_sysctl_write(struct ctl_table *table) |
2046 | { | |
2047 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
2048 | "This will not be supported in the future. To silence this\n" | |
2049 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
2050 | current->comm, table->procname); | |
2051 | } | |
2052 | ||
d383d484 | 2053 | /** |
5f733e8a | 2054 | * proc_first_pos_non_zero_ignore - check if first position is allowed |
d383d484 LR |
2055 | * @ppos: file position |
2056 | * @table: the sysctl table | |
2057 | * | |
2058 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
2059 | * mode indicates this is not allowed for numeric input types. String proc | |
5f733e8a | 2060 | * handlers can ignore the return value. |
d383d484 LR |
2061 | */ |
2062 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
2063 | struct ctl_table *table) | |
2064 | { | |
2065 | if (!*ppos) | |
2066 | return false; | |
2067 | ||
2068 | switch (sysctl_writes_strict) { | |
2069 | case SYSCTL_WRITES_STRICT: | |
2070 | return true; | |
2071 | case SYSCTL_WRITES_WARN: | |
2072 | warn_sysctl_write(table); | |
2073 | return false; | |
2074 | default: | |
2075 | return false; | |
2076 | } | |
2077 | } | |
2078 | ||
f5dd3d6f SV |
2079 | /** |
2080 | * proc_dostring - read a string sysctl | |
2081 | * @table: the sysctl table | |
2082 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2083 | * @buffer: the user buffer |
2084 | * @lenp: the size of the user buffer | |
2085 | * @ppos: file position | |
2086 | * | |
2087 | * Reads/writes a string from/to the user buffer. If the kernel | |
2088 | * buffer provided is not large enough to hold the string, the | |
2089 | * string is truncated. The copied string is %NULL-terminated. | |
2090 | * If the string is being read by the user process, it is copied | |
2091 | * and a newline '\n' is added. It is truncated if the buffer is | |
2092 | * not large enough. | |
2093 | * | |
2094 | * Returns 0 on success. | |
2095 | */ | |
8d65af78 | 2096 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2097 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2098 | { | |
d383d484 LR |
2099 | if (write) |
2100 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 2101 | |
f8808300 KC |
2102 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
2103 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
2104 | } |
2105 | ||
00b7c339 AW |
2106 | static size_t proc_skip_spaces(char **buf) |
2107 | { | |
2108 | size_t ret; | |
2109 | char *tmp = skip_spaces(*buf); | |
2110 | ret = tmp - *buf; | |
2111 | *buf = tmp; | |
2112 | return ret; | |
2113 | } | |
2114 | ||
9f977fb7 OP |
2115 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2116 | { | |
2117 | while (*size) { | |
2118 | if (**buf != v) | |
2119 | break; | |
2120 | (*size)--; | |
2121 | (*buf)++; | |
2122 | } | |
2123 | } | |
2124 | ||
7f2923c4 CB |
2125 | /** |
2126 | * strtoul_lenient - parse an ASCII formatted integer from a buffer and only | |
2127 | * fail on overflow | |
2128 | * | |
2129 | * @cp: kernel buffer containing the string to parse | |
2130 | * @endp: pointer to store the trailing characters | |
2131 | * @base: the base to use | |
2132 | * @res: where the parsed integer will be stored | |
2133 | * | |
2134 | * In case of success 0 is returned and @res will contain the parsed integer, | |
2135 | * @endp will hold any trailing characters. | |
2136 | * This function will fail the parse on overflow. If there wasn't an overflow | |
2137 | * the function will defer the decision what characters count as invalid to the | |
2138 | * caller. | |
2139 | */ | |
2140 | static int strtoul_lenient(const char *cp, char **endp, unsigned int base, | |
2141 | unsigned long *res) | |
2142 | { | |
2143 | unsigned long long result; | |
2144 | unsigned int rv; | |
2145 | ||
2146 | cp = _parse_integer_fixup_radix(cp, &base); | |
2147 | rv = _parse_integer(cp, base, &result); | |
2148 | if ((rv & KSTRTOX_OVERFLOW) || (result != (unsigned long)result)) | |
2149 | return -ERANGE; | |
2150 | ||
2151 | cp += rv; | |
2152 | ||
2153 | if (endp) | |
2154 | *endp = (char *)cp; | |
2155 | ||
2156 | *res = (unsigned long)result; | |
2157 | return 0; | |
2158 | } | |
2159 | ||
00b7c339 AW |
2160 | #define TMPBUFLEN 22 |
2161 | /** | |
0fc377bd | 2162 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2163 | * |
0fc377bd RD |
2164 | * @buf: a kernel buffer |
2165 | * @size: size of the kernel buffer | |
2166 | * @val: this is where the number will be stored | |
2167 | * @neg: set to %TRUE if number is negative | |
2168 | * @perm_tr: a vector which contains the allowed trailers | |
2169 | * @perm_tr_len: size of the perm_tr vector | |
2170 | * @tr: pointer to store the trailer character | |
00b7c339 | 2171 | * |
0fc377bd RD |
2172 | * In case of success %0 is returned and @buf and @size are updated with |
2173 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2174 | * character exists (size is non-zero after returning from this | |
2175 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2176 | */ |
2177 | static int proc_get_long(char **buf, size_t *size, | |
2178 | unsigned long *val, bool *neg, | |
2179 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2180 | { | |
2181 | int len; | |
2182 | char *p, tmp[TMPBUFLEN]; | |
2183 | ||
2184 | if (!*size) | |
2185 | return -EINVAL; | |
2186 | ||
2187 | len = *size; | |
2188 | if (len > TMPBUFLEN - 1) | |
2189 | len = TMPBUFLEN - 1; | |
2190 | ||
2191 | memcpy(tmp, *buf, len); | |
2192 | ||
2193 | tmp[len] = 0; | |
2194 | p = tmp; | |
2195 | if (*p == '-' && *size > 1) { | |
2196 | *neg = true; | |
2197 | p++; | |
2198 | } else | |
2199 | *neg = false; | |
2200 | if (!isdigit(*p)) | |
2201 | return -EINVAL; | |
2202 | ||
7f2923c4 CB |
2203 | if (strtoul_lenient(p, &p, 0, val)) |
2204 | return -EINVAL; | |
00b7c339 AW |
2205 | |
2206 | len = p - tmp; | |
2207 | ||
2208 | /* We don't know if the next char is whitespace thus we may accept | |
2209 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2210 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2211 | if (len == TMPBUFLEN - 1) | |
2212 | return -EINVAL; | |
2213 | ||
2214 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2215 | return -EINVAL; | |
1da177e4 | 2216 | |
00b7c339 AW |
2217 | if (tr && (len < *size)) |
2218 | *tr = *p; | |
2219 | ||
2220 | *buf += len; | |
2221 | *size -= len; | |
2222 | ||
2223 | return 0; | |
2224 | } | |
2225 | ||
2226 | /** | |
0fc377bd | 2227 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2228 | * |
0fc377bd RD |
2229 | * @buf: the user buffer |
2230 | * @size: the size of the user buffer | |
2231 | * @val: the integer to be converted | |
2232 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2233 | * |
0fc377bd RD |
2234 | * In case of success %0 is returned and @buf and @size are updated with |
2235 | * the amount of bytes written. | |
00b7c339 AW |
2236 | */ |
2237 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2238 | bool neg) | |
2239 | { | |
2240 | int len; | |
2241 | char tmp[TMPBUFLEN], *p = tmp; | |
2242 | ||
2243 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2244 | len = strlen(tmp); | |
2245 | if (len > *size) | |
2246 | len = *size; | |
2247 | if (copy_to_user(*buf, tmp, len)) | |
2248 | return -EFAULT; | |
2249 | *size -= len; | |
2250 | *buf += len; | |
2251 | return 0; | |
2252 | } | |
2253 | #undef TMPBUFLEN | |
2254 | ||
2255 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2256 | { | |
2257 | if (*size) { | |
2258 | char __user **buffer = (char __user **)buf; | |
2259 | if (put_user(c, *buffer)) | |
2260 | return -EFAULT; | |
2261 | (*size)--, (*buffer)++; | |
2262 | *buf = *buffer; | |
2263 | } | |
2264 | return 0; | |
2265 | } | |
1da177e4 | 2266 | |
00b7c339 | 2267 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2268 | int *valp, |
2269 | int write, void *data) | |
2270 | { | |
2271 | if (write) { | |
230633d1 HS |
2272 | if (*negp) { |
2273 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2274 | return -EINVAL; | |
2275 | *valp = -*lvalp; | |
2276 | } else { | |
2277 | if (*lvalp > (unsigned long) INT_MAX) | |
2278 | return -EINVAL; | |
2279 | *valp = *lvalp; | |
2280 | } | |
1da177e4 LT |
2281 | } else { |
2282 | int val = *valp; | |
2283 | if (val < 0) { | |
00b7c339 | 2284 | *negp = true; |
9a5bc726 | 2285 | *lvalp = -(unsigned long)val; |
1da177e4 | 2286 | } else { |
00b7c339 | 2287 | *negp = false; |
1da177e4 LT |
2288 | *lvalp = (unsigned long)val; |
2289 | } | |
2290 | } | |
2291 | return 0; | |
2292 | } | |
2293 | ||
4f2fec00 LR |
2294 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
2295 | unsigned int *valp, | |
2296 | int write, void *data) | |
e7d316a0 SAK |
2297 | { |
2298 | if (write) { | |
425fffd8 LZ |
2299 | if (*lvalp > UINT_MAX) |
2300 | return -EINVAL; | |
e7d316a0 SAK |
2301 | *valp = *lvalp; |
2302 | } else { | |
2303 | unsigned int val = *valp; | |
2304 | *lvalp = (unsigned long)val; | |
2305 | } | |
2306 | return 0; | |
2307 | } | |
2308 | ||
00b7c339 AW |
2309 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2310 | ||
d8217f07 | 2311 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2312 | int write, void __user *buffer, |
fcfbd547 | 2313 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2314 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2315 | int write, void *data), |
2316 | void *data) | |
2317 | { | |
00b7c339 | 2318 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2319 | size_t left; |
70f6cbb6 | 2320 | char *kbuf = NULL, *p; |
1da177e4 | 2321 | |
00b7c339 | 2322 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2323 | *lenp = 0; |
2324 | return 0; | |
2325 | } | |
2326 | ||
fcfbd547 | 2327 | i = (int *) tbl_data; |
1da177e4 LT |
2328 | vleft = table->maxlen / sizeof(*i); |
2329 | left = *lenp; | |
2330 | ||
2331 | if (!conv) | |
2332 | conv = do_proc_dointvec_conv; | |
2333 | ||
00b7c339 | 2334 | if (write) { |
d383d484 LR |
2335 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2336 | goto out; | |
f4aacea2 | 2337 | |
00b7c339 AW |
2338 | if (left > PAGE_SIZE - 1) |
2339 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2340 | p = kbuf = memdup_user_nul(buffer, left); |
2341 | if (IS_ERR(kbuf)) | |
2342 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2343 | } |
2344 | ||
1da177e4 | 2345 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2346 | unsigned long lval; |
2347 | bool neg; | |
1da177e4 | 2348 | |
00b7c339 | 2349 | if (write) { |
70f6cbb6 | 2350 | left -= proc_skip_spaces(&p); |
1da177e4 | 2351 | |
563b0467 O |
2352 | if (!left) |
2353 | break; | |
70f6cbb6 | 2354 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2355 | proc_wspace_sep, |
2356 | sizeof(proc_wspace_sep), NULL); | |
2357 | if (err) | |
1da177e4 | 2358 | break; |
00b7c339 AW |
2359 | if (conv(&neg, &lval, i, 1, data)) { |
2360 | err = -EINVAL; | |
1da177e4 | 2361 | break; |
00b7c339 | 2362 | } |
1da177e4 | 2363 | } else { |
00b7c339 AW |
2364 | if (conv(&neg, &lval, i, 0, data)) { |
2365 | err = -EINVAL; | |
2366 | break; | |
2367 | } | |
1da177e4 | 2368 | if (!first) |
00b7c339 AW |
2369 | err = proc_put_char(&buffer, &left, '\t'); |
2370 | if (err) | |
2371 | break; | |
2372 | err = proc_put_long(&buffer, &left, lval, neg); | |
2373 | if (err) | |
1da177e4 | 2374 | break; |
1da177e4 LT |
2375 | } |
2376 | } | |
2377 | ||
00b7c339 AW |
2378 | if (!write && !first && left && !err) |
2379 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2380 | if (write && !err && left) |
70f6cbb6 | 2381 | left -= proc_skip_spaces(&p); |
1da177e4 | 2382 | if (write) { |
70f6cbb6 | 2383 | kfree(kbuf); |
00b7c339 AW |
2384 | if (first) |
2385 | return err ? : -EINVAL; | |
1da177e4 | 2386 | } |
1da177e4 | 2387 | *lenp -= left; |
f4aacea2 | 2388 | out: |
1da177e4 | 2389 | *ppos += *lenp; |
00b7c339 | 2390 | return err; |
1da177e4 LT |
2391 | } |
2392 | ||
8d65af78 | 2393 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2394 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2395 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2396 | int write, void *data), |
2397 | void *data) | |
2398 | { | |
8d65af78 | 2399 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2400 | buffer, lenp, ppos, conv, data); |
2401 | } | |
2402 | ||
4f2fec00 LR |
2403 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
2404 | struct ctl_table *table, | |
2405 | void __user *buffer, | |
2406 | size_t *lenp, loff_t *ppos, | |
2407 | int (*conv)(unsigned long *lvalp, | |
2408 | unsigned int *valp, | |
2409 | int write, void *data), | |
2410 | void *data) | |
2411 | { | |
2412 | unsigned long lval; | |
2413 | int err = 0; | |
2414 | size_t left; | |
2415 | bool neg; | |
2416 | char *kbuf = NULL, *p; | |
2417 | ||
2418 | left = *lenp; | |
2419 | ||
2420 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
2421 | goto bail_early; | |
2422 | ||
2423 | if (left > PAGE_SIZE - 1) | |
2424 | left = PAGE_SIZE - 1; | |
2425 | ||
2426 | p = kbuf = memdup_user_nul(buffer, left); | |
2427 | if (IS_ERR(kbuf)) | |
2428 | return -EINVAL; | |
2429 | ||
2430 | left -= proc_skip_spaces(&p); | |
2431 | if (!left) { | |
2432 | err = -EINVAL; | |
2433 | goto out_free; | |
2434 | } | |
2435 | ||
2436 | err = proc_get_long(&p, &left, &lval, &neg, | |
2437 | proc_wspace_sep, | |
2438 | sizeof(proc_wspace_sep), NULL); | |
2439 | if (err || neg) { | |
2440 | err = -EINVAL; | |
2441 | goto out_free; | |
2442 | } | |
2443 | ||
2444 | if (conv(&lval, tbl_data, 1, data)) { | |
2445 | err = -EINVAL; | |
2446 | goto out_free; | |
2447 | } | |
2448 | ||
2449 | if (!err && left) | |
2450 | left -= proc_skip_spaces(&p); | |
2451 | ||
2452 | out_free: | |
2453 | kfree(kbuf); | |
2454 | if (err) | |
2455 | return -EINVAL; | |
2456 | ||
2457 | return 0; | |
2458 | ||
2459 | /* This is in keeping with old __do_proc_dointvec() */ | |
2460 | bail_early: | |
2461 | *ppos += *lenp; | |
2462 | return err; | |
2463 | } | |
2464 | ||
2465 | static int do_proc_douintvec_r(unsigned int *tbl_data, void __user *buffer, | |
2466 | size_t *lenp, loff_t *ppos, | |
2467 | int (*conv)(unsigned long *lvalp, | |
2468 | unsigned int *valp, | |
2469 | int write, void *data), | |
2470 | void *data) | |
2471 | { | |
2472 | unsigned long lval; | |
2473 | int err = 0; | |
2474 | size_t left; | |
2475 | ||
2476 | left = *lenp; | |
2477 | ||
2478 | if (conv(&lval, tbl_data, 0, data)) { | |
2479 | err = -EINVAL; | |
2480 | goto out; | |
2481 | } | |
2482 | ||
2483 | err = proc_put_long(&buffer, &left, lval, false); | |
2484 | if (err || !left) | |
2485 | goto out; | |
2486 | ||
2487 | err = proc_put_char(&buffer, &left, '\n'); | |
2488 | ||
2489 | out: | |
2490 | *lenp -= left; | |
2491 | *ppos += *lenp; | |
2492 | ||
2493 | return err; | |
2494 | } | |
2495 | ||
2496 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
2497 | int write, void __user *buffer, | |
2498 | size_t *lenp, loff_t *ppos, | |
2499 | int (*conv)(unsigned long *lvalp, | |
2500 | unsigned int *valp, | |
2501 | int write, void *data), | |
2502 | void *data) | |
2503 | { | |
2504 | unsigned int *i, vleft; | |
2505 | ||
2506 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
2507 | *lenp = 0; | |
2508 | return 0; | |
2509 | } | |
2510 | ||
2511 | i = (unsigned int *) tbl_data; | |
2512 | vleft = table->maxlen / sizeof(*i); | |
2513 | ||
2514 | /* | |
2515 | * Arrays are not supported, keep this simple. *Do not* add | |
2516 | * support for them. | |
2517 | */ | |
2518 | if (vleft != 1) { | |
2519 | *lenp = 0; | |
2520 | return -EINVAL; | |
2521 | } | |
2522 | ||
2523 | if (!conv) | |
2524 | conv = do_proc_douintvec_conv; | |
2525 | ||
2526 | if (write) | |
2527 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
2528 | conv, data); | |
2529 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
2530 | } | |
2531 | ||
2532 | static int do_proc_douintvec(struct ctl_table *table, int write, | |
2533 | void __user *buffer, size_t *lenp, loff_t *ppos, | |
2534 | int (*conv)(unsigned long *lvalp, | |
2535 | unsigned int *valp, | |
2536 | int write, void *data), | |
2537 | void *data) | |
2538 | { | |
2539 | return __do_proc_douintvec(table->data, table, write, | |
2540 | buffer, lenp, ppos, conv, data); | |
2541 | } | |
2542 | ||
1da177e4 LT |
2543 | /** |
2544 | * proc_dointvec - read a vector of integers | |
2545 | * @table: the sysctl table | |
2546 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2547 | * @buffer: the user buffer |
2548 | * @lenp: the size of the user buffer | |
2549 | * @ppos: file position | |
2550 | * | |
2551 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2552 | * values from/to the user buffer, treated as an ASCII string. | |
2553 | * | |
2554 | * Returns 0 on success. | |
2555 | */ | |
8d65af78 | 2556 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2557 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2558 | { | |
e7d316a0 SAK |
2559 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2560 | } | |
2561 | ||
2562 | /** | |
2563 | * proc_douintvec - read a vector of unsigned integers | |
2564 | * @table: the sysctl table | |
2565 | * @write: %TRUE if this is a write to the sysctl file | |
2566 | * @buffer: the user buffer | |
2567 | * @lenp: the size of the user buffer | |
2568 | * @ppos: file position | |
2569 | * | |
2570 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2571 | * values from/to the user buffer, treated as an ASCII string. | |
2572 | * | |
2573 | * Returns 0 on success. | |
2574 | */ | |
2575 | int proc_douintvec(struct ctl_table *table, int write, | |
2576 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2577 | { | |
4f2fec00 LR |
2578 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
2579 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2580 | } |
2581 | ||
34f5a398 | 2582 | /* |
25ddbb18 AK |
2583 | * Taint values can only be increased |
2584 | * This means we can safely use a temporary. | |
34f5a398 | 2585 | */ |
8d65af78 | 2586 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2587 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2588 | { | |
25ddbb18 AK |
2589 | struct ctl_table t; |
2590 | unsigned long tmptaint = get_taint(); | |
2591 | int err; | |
34f5a398 | 2592 | |
91fcd412 | 2593 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2594 | return -EPERM; |
2595 | ||
25ddbb18 AK |
2596 | t = *table; |
2597 | t.data = &tmptaint; | |
8d65af78 | 2598 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2599 | if (err < 0) |
2600 | return err; | |
2601 | ||
2602 | if (write) { | |
2603 | /* | |
2604 | * Poor man's atomic or. Not worth adding a primitive | |
2605 | * to everyone's atomic.h for this | |
2606 | */ | |
2607 | int i; | |
2608 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2609 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2610 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2611 | } |
2612 | } | |
2613 | ||
2614 | return err; | |
34f5a398 TT |
2615 | } |
2616 | ||
bfdc0b49 | 2617 | #ifdef CONFIG_PRINTK |
620f6e8e | 2618 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2619 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2620 | { | |
2621 | if (write && !capable(CAP_SYS_ADMIN)) | |
2622 | return -EPERM; | |
2623 | ||
2624 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2625 | } | |
2626 | #endif | |
2627 | ||
24704f36 WL |
2628 | /** |
2629 | * struct do_proc_dointvec_minmax_conv_param - proc_dointvec_minmax() range checking structure | |
2630 | * @min: pointer to minimum allowable value | |
2631 | * @max: pointer to maximum allowable value | |
2632 | * | |
2633 | * The do_proc_dointvec_minmax_conv_param structure provides the | |
2634 | * minimum and maximum values for doing range checking for those sysctl | |
2635 | * parameters that use the proc_dointvec_minmax() handler. | |
2636 | */ | |
1da177e4 LT |
2637 | struct do_proc_dointvec_minmax_conv_param { |
2638 | int *min; | |
2639 | int *max; | |
2640 | }; | |
2641 | ||
00b7c339 AW |
2642 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2643 | int *valp, | |
1da177e4 LT |
2644 | int write, void *data) |
2645 | { | |
2bc4fc60 | 2646 | int tmp, ret; |
1da177e4 | 2647 | struct do_proc_dointvec_minmax_conv_param *param = data; |
2bc4fc60 ZW |
2648 | /* |
2649 | * If writing, first do so via a temporary local int so we can | |
2650 | * bounds-check it before touching *valp. | |
2651 | */ | |
2652 | int *ip = write ? &tmp : valp; | |
2653 | ||
2654 | ret = do_proc_dointvec_conv(negp, lvalp, ip, write, data); | |
2655 | if (ret) | |
2656 | return ret; | |
2657 | ||
1da177e4 | 2658 | if (write) { |
2bc4fc60 ZW |
2659 | if ((param->min && *param->min > tmp) || |
2660 | (param->max && *param->max < tmp)) | |
1da177e4 | 2661 | return -EINVAL; |
2bc4fc60 | 2662 | *valp = tmp; |
1da177e4 | 2663 | } |
2bc4fc60 | 2664 | |
1da177e4 LT |
2665 | return 0; |
2666 | } | |
2667 | ||
2668 | /** | |
2669 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2670 | * @table: the sysctl table | |
2671 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2672 | * @buffer: the user buffer |
2673 | * @lenp: the size of the user buffer | |
2674 | * @ppos: file position | |
2675 | * | |
2676 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2677 | * values from/to the user buffer, treated as an ASCII string. | |
2678 | * | |
2679 | * This routine will ensure the values are within the range specified by | |
2680 | * table->extra1 (min) and table->extra2 (max). | |
2681 | * | |
24704f36 | 2682 | * Returns 0 on success or -EINVAL on write when the range check fails. |
1da177e4 | 2683 | */ |
8d65af78 | 2684 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2685 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2686 | { | |
2687 | struct do_proc_dointvec_minmax_conv_param param = { | |
2688 | .min = (int *) table->extra1, | |
2689 | .max = (int *) table->extra2, | |
2690 | }; | |
8d65af78 | 2691 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2692 | do_proc_dointvec_minmax_conv, ¶m); |
2693 | } | |
2694 | ||
24704f36 WL |
2695 | /** |
2696 | * struct do_proc_douintvec_minmax_conv_param - proc_douintvec_minmax() range checking structure | |
2697 | * @min: pointer to minimum allowable value | |
2698 | * @max: pointer to maximum allowable value | |
2699 | * | |
2700 | * The do_proc_douintvec_minmax_conv_param structure provides the | |
2701 | * minimum and maximum values for doing range checking for those sysctl | |
2702 | * parameters that use the proc_douintvec_minmax() handler. | |
2703 | */ | |
61d9b56a LR |
2704 | struct do_proc_douintvec_minmax_conv_param { |
2705 | unsigned int *min; | |
2706 | unsigned int *max; | |
2707 | }; | |
2708 | ||
2709 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
2710 | unsigned int *valp, | |
2711 | int write, void *data) | |
2712 | { | |
2bc4fc60 ZW |
2713 | int ret; |
2714 | unsigned int tmp; | |
61d9b56a | 2715 | struct do_proc_douintvec_minmax_conv_param *param = data; |
2bc4fc60 ZW |
2716 | /* write via temporary local uint for bounds-checking */ |
2717 | unsigned int *up = write ? &tmp : valp; | |
61d9b56a | 2718 | |
2bc4fc60 ZW |
2719 | ret = do_proc_douintvec_conv(lvalp, up, write, data); |
2720 | if (ret) | |
2721 | return ret; | |
fb910c42 | 2722 | |
2bc4fc60 ZW |
2723 | if (write) { |
2724 | if ((param->min && *param->min > tmp) || | |
2725 | (param->max && *param->max < tmp)) | |
61d9b56a LR |
2726 | return -ERANGE; |
2727 | ||
2bc4fc60 | 2728 | *valp = tmp; |
61d9b56a LR |
2729 | } |
2730 | ||
2731 | return 0; | |
2732 | } | |
2733 | ||
2734 | /** | |
2735 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
2736 | * @table: the sysctl table | |
2737 | * @write: %TRUE if this is a write to the sysctl file | |
2738 | * @buffer: the user buffer | |
2739 | * @lenp: the size of the user buffer | |
2740 | * @ppos: file position | |
2741 | * | |
2742 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2743 | * values from/to the user buffer, treated as an ASCII string. Negative | |
2744 | * strings are not allowed. | |
2745 | * | |
2746 | * This routine will ensure the values are within the range specified by | |
2747 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
2748 | * check for UINT_MAX to avoid having to support wrap around uses from | |
2749 | * userspace. | |
2750 | * | |
24704f36 | 2751 | * Returns 0 on success or -ERANGE on write when the range check fails. |
61d9b56a LR |
2752 | */ |
2753 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
2754 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2755 | { | |
2756 | struct do_proc_douintvec_minmax_conv_param param = { | |
2757 | .min = (unsigned int *) table->extra1, | |
2758 | .max = (unsigned int *) table->extra2, | |
2759 | }; | |
2760 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
2761 | do_proc_douintvec_minmax_conv, ¶m); | |
2762 | } | |
2763 | ||
7a8d1819 JL |
2764 | static int do_proc_dopipe_max_size_conv(unsigned long *lvalp, |
2765 | unsigned int *valp, | |
2766 | int write, void *data) | |
2767 | { | |
7a8d1819 | 2768 | if (write) { |
fb910c42 | 2769 | unsigned int val; |
7a8d1819 | 2770 | |
fb910c42 | 2771 | val = round_pipe_size(*lvalp); |
7a8d1819 JL |
2772 | if (val == 0) |
2773 | return -EINVAL; | |
2774 | ||
7a8d1819 JL |
2775 | *valp = val; |
2776 | } else { | |
2777 | unsigned int val = *valp; | |
2778 | *lvalp = (unsigned long) val; | |
2779 | } | |
2780 | ||
2781 | return 0; | |
2782 | } | |
2783 | ||
319e0a21 EB |
2784 | static int proc_dopipe_max_size(struct ctl_table *table, int write, |
2785 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
7a8d1819 | 2786 | { |
7a8d1819 | 2787 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
4c2e4bef | 2788 | do_proc_dopipe_max_size_conv, NULL); |
7a8d1819 JL |
2789 | } |
2790 | ||
54b50199 KC |
2791 | static void validate_coredump_safety(void) |
2792 | { | |
046d662f | 2793 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2794 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2795 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2796 | printk(KERN_WARNING |
2797 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2798 | "Pipe handler or fully qualified core dump path required.\n" | |
2799 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2800 | ); | |
54b50199 | 2801 | } |
046d662f | 2802 | #endif |
54b50199 KC |
2803 | } |
2804 | ||
2805 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2806 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2807 | { | |
2808 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2809 | if (!error) | |
2810 | validate_coredump_safety(); | |
2811 | return error; | |
2812 | } | |
2813 | ||
046d662f | 2814 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2815 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2816 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2817 | { | |
2818 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2819 | if (!error) | |
2820 | validate_coredump_safety(); | |
2821 | return error; | |
2822 | } | |
046d662f | 2823 | #endif |
54b50199 | 2824 | |
d8217f07 | 2825 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2826 | void __user *buffer, |
2827 | size_t *lenp, loff_t *ppos, | |
2828 | unsigned long convmul, | |
2829 | unsigned long convdiv) | |
2830 | { | |
00b7c339 AW |
2831 | unsigned long *i, *min, *max; |
2832 | int vleft, first = 1, err = 0; | |
00b7c339 | 2833 | size_t left; |
70f6cbb6 | 2834 | char *kbuf = NULL, *p; |
00b7c339 AW |
2835 | |
2836 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2837 | *lenp = 0; |
2838 | return 0; | |
2839 | } | |
00b7c339 | 2840 | |
fcfbd547 | 2841 | i = (unsigned long *) data; |
1da177e4 LT |
2842 | min = (unsigned long *) table->extra1; |
2843 | max = (unsigned long *) table->extra2; | |
2844 | vleft = table->maxlen / sizeof(unsigned long); | |
2845 | left = *lenp; | |
00b7c339 AW |
2846 | |
2847 | if (write) { | |
d383d484 LR |
2848 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2849 | goto out; | |
f4aacea2 | 2850 | |
00b7c339 AW |
2851 | if (left > PAGE_SIZE - 1) |
2852 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2853 | p = kbuf = memdup_user_nul(buffer, left); |
2854 | if (IS_ERR(kbuf)) | |
2855 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2856 | } |
2857 | ||
27b3d80a | 2858 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2859 | unsigned long val; |
2860 | ||
1da177e4 | 2861 | if (write) { |
00b7c339 AW |
2862 | bool neg; |
2863 | ||
70f6cbb6 | 2864 | left -= proc_skip_spaces(&p); |
09be1784 CL |
2865 | if (!left) |
2866 | break; | |
00b7c339 | 2867 | |
70f6cbb6 | 2868 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2869 | proc_wspace_sep, |
2870 | sizeof(proc_wspace_sep), NULL); | |
2871 | if (err) | |
1da177e4 LT |
2872 | break; |
2873 | if (neg) | |
1da177e4 | 2874 | continue; |
ff9f8a7c | 2875 | val = convmul * val / convdiv; |
1da177e4 LT |
2876 | if ((min && val < *min) || (max && val > *max)) |
2877 | continue; | |
2878 | *i = val; | |
2879 | } else { | |
00b7c339 | 2880 | val = convdiv * (*i) / convmul; |
7833819d | 2881 | if (!first) { |
00b7c339 | 2882 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2883 | if (err) |
2884 | break; | |
2885 | } | |
00b7c339 AW |
2886 | err = proc_put_long(&buffer, &left, val, false); |
2887 | if (err) | |
2888 | break; | |
1da177e4 LT |
2889 | } |
2890 | } | |
2891 | ||
00b7c339 AW |
2892 | if (!write && !first && left && !err) |
2893 | err = proc_put_char(&buffer, &left, '\n'); | |
2894 | if (write && !err) | |
70f6cbb6 | 2895 | left -= proc_skip_spaces(&p); |
1da177e4 | 2896 | if (write) { |
70f6cbb6 | 2897 | kfree(kbuf); |
00b7c339 AW |
2898 | if (first) |
2899 | return err ? : -EINVAL; | |
1da177e4 | 2900 | } |
1da177e4 | 2901 | *lenp -= left; |
f4aacea2 | 2902 | out: |
1da177e4 | 2903 | *ppos += *lenp; |
00b7c339 | 2904 | return err; |
1da177e4 LT |
2905 | } |
2906 | ||
d8217f07 | 2907 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2908 | void __user *buffer, |
2909 | size_t *lenp, loff_t *ppos, | |
2910 | unsigned long convmul, | |
2911 | unsigned long convdiv) | |
2912 | { | |
2913 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2914 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2915 | } |
2916 | ||
1da177e4 LT |
2917 | /** |
2918 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2919 | * @table: the sysctl table | |
2920 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2921 | * @buffer: the user buffer |
2922 | * @lenp: the size of the user buffer | |
2923 | * @ppos: file position | |
2924 | * | |
2925 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2926 | * values from/to the user buffer, treated as an ASCII string. | |
2927 | * | |
2928 | * This routine will ensure the values are within the range specified by | |
2929 | * table->extra1 (min) and table->extra2 (max). | |
2930 | * | |
2931 | * Returns 0 on success. | |
2932 | */ | |
8d65af78 | 2933 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2934 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2935 | { | |
8d65af78 | 2936 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2937 | } |
2938 | ||
2939 | /** | |
2940 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2941 | * @table: the sysctl table | |
2942 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2943 | * @buffer: the user buffer |
2944 | * @lenp: the size of the user buffer | |
2945 | * @ppos: file position | |
2946 | * | |
2947 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2948 | * values from/to the user buffer, treated as an ASCII string. The values | |
2949 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2950 | * | |
2951 | * This routine will ensure the values are within the range specified by | |
2952 | * table->extra1 (min) and table->extra2 (max). | |
2953 | * | |
2954 | * Returns 0 on success. | |
2955 | */ | |
d8217f07 | 2956 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2957 | void __user *buffer, |
2958 | size_t *lenp, loff_t *ppos) | |
2959 | { | |
8d65af78 | 2960 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2961 | lenp, ppos, HZ, 1000l); |
2962 | } | |
2963 | ||
2964 | ||
00b7c339 | 2965 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2966 | int *valp, |
2967 | int write, void *data) | |
2968 | { | |
2969 | if (write) { | |
63259457 | 2970 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 2971 | return 1; |
1da177e4 LT |
2972 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2973 | } else { | |
2974 | int val = *valp; | |
2975 | unsigned long lval; | |
2976 | if (val < 0) { | |
00b7c339 | 2977 | *negp = true; |
9a5bc726 | 2978 | lval = -(unsigned long)val; |
1da177e4 | 2979 | } else { |
00b7c339 | 2980 | *negp = false; |
1da177e4 LT |
2981 | lval = (unsigned long)val; |
2982 | } | |
2983 | *lvalp = lval / HZ; | |
2984 | } | |
2985 | return 0; | |
2986 | } | |
2987 | ||
00b7c339 | 2988 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2989 | int *valp, |
2990 | int write, void *data) | |
2991 | { | |
2992 | if (write) { | |
cba9f33d BS |
2993 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2994 | return 1; | |
1da177e4 LT |
2995 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2996 | } else { | |
2997 | int val = *valp; | |
2998 | unsigned long lval; | |
2999 | if (val < 0) { | |
00b7c339 | 3000 | *negp = true; |
9a5bc726 | 3001 | lval = -(unsigned long)val; |
1da177e4 | 3002 | } else { |
00b7c339 | 3003 | *negp = false; |
1da177e4 LT |
3004 | lval = (unsigned long)val; |
3005 | } | |
3006 | *lvalp = jiffies_to_clock_t(lval); | |
3007 | } | |
3008 | return 0; | |
3009 | } | |
3010 | ||
00b7c339 | 3011 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
3012 | int *valp, |
3013 | int write, void *data) | |
3014 | { | |
3015 | if (write) { | |
d738ce8f FF |
3016 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
3017 | ||
3018 | if (jif > INT_MAX) | |
3019 | return 1; | |
3020 | *valp = (int)jif; | |
1da177e4 LT |
3021 | } else { |
3022 | int val = *valp; | |
3023 | unsigned long lval; | |
3024 | if (val < 0) { | |
00b7c339 | 3025 | *negp = true; |
9a5bc726 | 3026 | lval = -(unsigned long)val; |
1da177e4 | 3027 | } else { |
00b7c339 | 3028 | *negp = false; |
1da177e4 LT |
3029 | lval = (unsigned long)val; |
3030 | } | |
3031 | *lvalp = jiffies_to_msecs(lval); | |
3032 | } | |
3033 | return 0; | |
3034 | } | |
3035 | ||
3036 | /** | |
3037 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
3038 | * @table: the sysctl table | |
3039 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3040 | * @buffer: the user buffer |
3041 | * @lenp: the size of the user buffer | |
3042 | * @ppos: file position | |
3043 | * | |
3044 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3045 | * values from/to the user buffer, treated as an ASCII string. | |
3046 | * The values read are assumed to be in seconds, and are converted into | |
3047 | * jiffies. | |
3048 | * | |
3049 | * Returns 0 on success. | |
3050 | */ | |
8d65af78 | 3051 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3052 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3053 | { | |
8d65af78 | 3054 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
3055 | do_proc_dointvec_jiffies_conv,NULL); |
3056 | } | |
3057 | ||
3058 | /** | |
3059 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
3060 | * @table: the sysctl table | |
3061 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3062 | * @buffer: the user buffer |
3063 | * @lenp: the size of the user buffer | |
1e5d5331 | 3064 | * @ppos: pointer to the file position |
1da177e4 LT |
3065 | * |
3066 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3067 | * values from/to the user buffer, treated as an ASCII string. | |
3068 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
3069 | * are converted into jiffies. | |
3070 | * | |
3071 | * Returns 0 on success. | |
3072 | */ | |
8d65af78 | 3073 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3074 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3075 | { | |
8d65af78 | 3076 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
3077 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
3078 | } | |
3079 | ||
3080 | /** | |
3081 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
3082 | * @table: the sysctl table | |
3083 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3084 | * @buffer: the user buffer |
3085 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
3086 | * @ppos: file position |
3087 | * @ppos: the current position in the file | |
1da177e4 LT |
3088 | * |
3089 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3090 | * values from/to the user buffer, treated as an ASCII string. | |
3091 | * The values read are assumed to be in 1/1000 seconds, and | |
3092 | * are converted into jiffies. | |
3093 | * | |
3094 | * Returns 0 on success. | |
3095 | */ | |
8d65af78 | 3096 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3097 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3098 | { | |
8d65af78 | 3099 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
3100 | do_proc_dointvec_ms_jiffies_conv, NULL); |
3101 | } | |
3102 | ||
8d65af78 | 3103 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
3104 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3105 | { | |
3106 | struct pid *new_pid; | |
3107 | pid_t tmp; | |
3108 | int r; | |
3109 | ||
6c5f3e7b | 3110 | tmp = pid_vnr(cad_pid); |
9ec52099 | 3111 | |
8d65af78 | 3112 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
3113 | lenp, ppos, NULL, NULL); |
3114 | if (r || !write) | |
3115 | return r; | |
3116 | ||
3117 | new_pid = find_get_pid(tmp); | |
3118 | if (!new_pid) | |
3119 | return -ESRCH; | |
3120 | ||
3121 | put_pid(xchg(&cad_pid, new_pid)); | |
3122 | return 0; | |
3123 | } | |
3124 | ||
9f977fb7 OP |
3125 | /** |
3126 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
3127 | * @table: the sysctl table | |
3128 | * @write: %TRUE if this is a write to the sysctl file | |
3129 | * @buffer: the user buffer | |
3130 | * @lenp: the size of the user buffer | |
3131 | * @ppos: file position | |
3132 | * | |
3133 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
3134 | * in table->maxlen. | |
3135 | * | |
3136 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
3137 | * large bitmaps may be represented in a compact manner. Writing into | |
3138 | * the file will clear the bitmap then update it with the given input. | |
3139 | * | |
3140 | * Returns 0 on success. | |
3141 | */ | |
3142 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
3143 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3144 | { | |
3145 | int err = 0; | |
3146 | bool first = 1; | |
3147 | size_t left = *lenp; | |
3148 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 3149 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
3150 | unsigned long *tmp_bitmap = NULL; |
3151 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
3152 | ||
122ff243 | 3153 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
3154 | *lenp = 0; |
3155 | return 0; | |
3156 | } | |
3157 | ||
3158 | if (write) { | |
70f6cbb6 | 3159 | char *kbuf, *p; |
9f977fb7 OP |
3160 | |
3161 | if (left > PAGE_SIZE - 1) | |
3162 | left = PAGE_SIZE - 1; | |
3163 | ||
70f6cbb6 AV |
3164 | p = kbuf = memdup_user_nul(buffer, left); |
3165 | if (IS_ERR(kbuf)) | |
3166 | return PTR_ERR(kbuf); | |
9f977fb7 | 3167 | |
6396bb22 KC |
3168 | tmp_bitmap = kcalloc(BITS_TO_LONGS(bitmap_len), |
3169 | sizeof(unsigned long), | |
9f977fb7 OP |
3170 | GFP_KERNEL); |
3171 | if (!tmp_bitmap) { | |
70f6cbb6 | 3172 | kfree(kbuf); |
9f977fb7 OP |
3173 | return -ENOMEM; |
3174 | } | |
70f6cbb6 | 3175 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
3176 | while (!err && left) { |
3177 | unsigned long val_a, val_b; | |
3178 | bool neg; | |
3179 | ||
70f6cbb6 | 3180 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
3181 | sizeof(tr_a), &c); |
3182 | if (err) | |
3183 | break; | |
3184 | if (val_a >= bitmap_len || neg) { | |
3185 | err = -EINVAL; | |
3186 | break; | |
3187 | } | |
3188 | ||
3189 | val_b = val_a; | |
3190 | if (left) { | |
70f6cbb6 | 3191 | p++; |
9f977fb7 OP |
3192 | left--; |
3193 | } | |
3194 | ||
3195 | if (c == '-') { | |
70f6cbb6 | 3196 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
3197 | &neg, tr_b, sizeof(tr_b), |
3198 | &c); | |
3199 | if (err) | |
3200 | break; | |
3201 | if (val_b >= bitmap_len || neg || | |
3202 | val_a > val_b) { | |
3203 | err = -EINVAL; | |
3204 | break; | |
3205 | } | |
3206 | if (left) { | |
70f6cbb6 | 3207 | p++; |
9f977fb7 OP |
3208 | left--; |
3209 | } | |
3210 | } | |
3211 | ||
5a04cca6 | 3212 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 3213 | first = 0; |
70f6cbb6 | 3214 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 3215 | } |
70f6cbb6 | 3216 | kfree(kbuf); |
9f977fb7 OP |
3217 | } else { |
3218 | unsigned long bit_a, bit_b = 0; | |
3219 | ||
3220 | while (left) { | |
3221 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
3222 | if (bit_a >= bitmap_len) | |
3223 | break; | |
3224 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
3225 | bit_a + 1) - 1; | |
3226 | ||
3227 | if (!first) { | |
3228 | err = proc_put_char(&buffer, &left, ','); | |
3229 | if (err) | |
3230 | break; | |
3231 | } | |
3232 | err = proc_put_long(&buffer, &left, bit_a, false); | |
3233 | if (err) | |
3234 | break; | |
3235 | if (bit_a != bit_b) { | |
3236 | err = proc_put_char(&buffer, &left, '-'); | |
3237 | if (err) | |
3238 | break; | |
3239 | err = proc_put_long(&buffer, &left, bit_b, false); | |
3240 | if (err) | |
3241 | break; | |
3242 | } | |
3243 | ||
3244 | first = 0; bit_b++; | |
3245 | } | |
3246 | if (!err) | |
3247 | err = proc_put_char(&buffer, &left, '\n'); | |
3248 | } | |
3249 | ||
3250 | if (!err) { | |
3251 | if (write) { | |
3252 | if (*ppos) | |
3253 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
3254 | else | |
5a04cca6 | 3255 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 | 3256 | } |
9f977fb7 OP |
3257 | *lenp -= left; |
3258 | *ppos += *lenp; | |
9f977fb7 | 3259 | } |
f9eb2fdd OK |
3260 | |
3261 | kfree(tmp_bitmap); | |
3262 | return err; | |
9f977fb7 OP |
3263 | } |
3264 | ||
55610500 | 3265 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3266 | |
8d65af78 | 3267 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
3268 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3269 | { | |
3270 | return -ENOSYS; | |
3271 | } | |
3272 | ||
8d65af78 | 3273 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 3274 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
3275 | { |
3276 | return -ENOSYS; | |
3277 | } | |
3278 | ||
e7d316a0 SAK |
3279 | int proc_douintvec(struct ctl_table *table, int write, |
3280 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3281 | { | |
3282 | return -ENOSYS; | |
3283 | } | |
3284 | ||
8d65af78 | 3285 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3286 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3287 | { | |
3288 | return -ENOSYS; | |
3289 | } | |
3290 | ||
61d9b56a LR |
3291 | int proc_douintvec_minmax(struct ctl_table *table, int write, |
3292 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3293 | { | |
3294 | return -ENOSYS; | |
3295 | } | |
3296 | ||
8d65af78 | 3297 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3298 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3299 | { | |
3300 | return -ENOSYS; | |
3301 | } | |
3302 | ||
8d65af78 | 3303 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3304 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3305 | { | |
3306 | return -ENOSYS; | |
3307 | } | |
3308 | ||
8d65af78 | 3309 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3310 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3311 | { | |
3312 | return -ENOSYS; | |
3313 | } | |
3314 | ||
8d65af78 | 3315 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3316 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3317 | { | |
3318 | return -ENOSYS; | |
3319 | } | |
3320 | ||
d8217f07 | 3321 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3322 | void __user *buffer, |
3323 | size_t *lenp, loff_t *ppos) | |
3324 | { | |
3325 | return -ENOSYS; | |
3326 | } | |
3327 | ||
3328 | ||
55610500 | 3329 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3330 | |
78c3aff8 | 3331 | #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL) |
492ecee8 AS |
3332 | static int proc_dointvec_minmax_bpf_stats(struct ctl_table *table, int write, |
3333 | void __user *buffer, size_t *lenp, | |
3334 | loff_t *ppos) | |
3335 | { | |
3336 | int ret, bpf_stats = *(int *)table->data; | |
3337 | struct ctl_table tmp = *table; | |
3338 | ||
3339 | if (write && !capable(CAP_SYS_ADMIN)) | |
3340 | return -EPERM; | |
3341 | ||
3342 | tmp.data = &bpf_stats; | |
3343 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
3344 | if (write && !ret) { | |
3345 | *(int *)table->data = bpf_stats; | |
3346 | if (bpf_stats) | |
3347 | static_branch_enable(&bpf_stats_enabled_key); | |
3348 | else | |
3349 | static_branch_disable(&bpf_stats_enabled_key); | |
3350 | } | |
3351 | return ret; | |
3352 | } | |
3fcc5530 | 3353 | #endif |
1da177e4 LT |
3354 | /* |
3355 | * No sense putting this after each symbol definition, twice, | |
3356 | * exception granted :-) | |
3357 | */ | |
3358 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 3359 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
3360 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
3361 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 3362 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
1da177e4 LT |
3363 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
3364 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3365 | EXPORT_SYMBOL(proc_dostring); | |
3366 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3367 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |