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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 | 21 | #include <linux/module.h> |
e2e40f2c | 22 | #include <linux/aio.h> |
1da177e4 LT |
23 | #include <linux/mm.h> |
24 | #include <linux/swap.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/sysctl.h> | |
5a04cca6 | 27 | #include <linux/bitmap.h> |
d33ed52d | 28 | #include <linux/signal.h> |
455cd5ab | 29 | #include <linux/printk.h> |
1da177e4 | 30 | #include <linux/proc_fs.h> |
72c2d582 | 31 | #include <linux/security.h> |
1da177e4 | 32 | #include <linux/ctype.h> |
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; |
9002b214 | 131 | static unsigned long zero_ul; |
fc3501d4 | 132 | static unsigned long one_ul = 1; |
32a5ad9c | 133 | static unsigned long long_max = LONG_MAX; |
c4f3b63f | 134 | static int one_hundred = 100; |
795ae7a0 | 135 | static int one_thousand = 1000; |
af91322e DY |
136 | #ifdef CONFIG_PRINTK |
137 | static int ten_thousand = 10000; | |
138 | #endif | |
c5dfd78e ACM |
139 | #ifdef CONFIG_PERF_EVENTS |
140 | static int six_hundred_forty_kb = 640 * 1024; | |
141 | #endif | |
c4f3b63f | 142 | |
9e4a5bda AR |
143 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
144 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
145 | ||
1da177e4 LT |
146 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
147 | static int maxolduid = 65535; | |
148 | static int minolduid; | |
149 | ||
150 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 151 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 152 | |
a2e51445 DV |
153 | /* |
154 | * This is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs | |
155 | * and hung_task_check_interval_secs | |
156 | */ | |
80df2847 LH |
157 | #ifdef CONFIG_DETECT_HUNG_TASK |
158 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
159 | #endif | |
160 | ||
d14f1729 DY |
161 | #ifdef CONFIG_INOTIFY_USER |
162 | #include <linux/inotify.h> | |
163 | #endif | |
72c57ed5 | 164 | #ifdef CONFIG_SPARC |
1da177e4 LT |
165 | #endif |
166 | ||
167 | #ifdef __hppa__ | |
168 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
169 | #endif |
170 | ||
171 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
172 | extern int unaligned_enabled; |
173 | #endif | |
1da177e4 | 174 | |
d2b176ed | 175 | #ifdef CONFIG_IA64 |
88fc241f | 176 | extern int unaligned_dump_stack; |
d2b176ed JS |
177 | #endif |
178 | ||
b6fca725 VG |
179 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
180 | extern int no_unaligned_warning; | |
181 | #endif | |
182 | ||
d6f8ff73 | 183 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 | 184 | |
a19ac337 LR |
185 | /** |
186 | * enum sysctl_writes_mode - supported sysctl write modes | |
187 | * | |
188 | * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value | |
189 | * to be written, and multiple writes on the same sysctl file descriptor | |
190 | * will rewrite the sysctl value, regardless of file position. No warning | |
191 | * is issued when the initial position is not 0. | |
192 | * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is | |
193 | * not 0. | |
194 | * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at | |
195 | * file position 0 and the value must be fully contained in the buffer | |
196 | * sent to the write syscall. If dealing with strings respect the file | |
197 | * position, but restrict this to the max length of the buffer, anything | |
198 | * passed the max lenght will be ignored. Multiple writes will append | |
199 | * to the buffer. | |
200 | * | |
201 | * These write modes control how current file position affects the behavior of | |
202 | * updating sysctl values through the proc interface on each write. | |
203 | */ | |
204 | enum sysctl_writes_mode { | |
205 | SYSCTL_WRITES_LEGACY = -1, | |
206 | SYSCTL_WRITES_WARN = 0, | |
207 | SYSCTL_WRITES_STRICT = 1, | |
208 | }; | |
f4aacea2 | 209 | |
a19ac337 | 210 | static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 211 | |
8d65af78 | 212 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 213 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 214 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 215 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 216 | #endif |
9ec52099 | 217 | |
bfdc0b49 | 218 | #ifdef CONFIG_PRINTK |
620f6e8e | 219 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
220 | void __user *buffer, size_t *lenp, loff_t *ppos); |
221 | #endif | |
222 | ||
54b50199 KC |
223 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
224 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 225 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
226 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
227 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 228 | #endif |
319e0a21 EB |
229 | static int proc_dopipe_max_size(struct ctl_table *table, int write, |
230 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
3fcc5530 | 231 | #ifdef CONFIG_BPF_SYSCALL |
492ecee8 AS |
232 | static int proc_dointvec_minmax_bpf_stats(struct ctl_table *table, int write, |
233 | void __user *buffer, size_t *lenp, | |
234 | loff_t *ppos); | |
3fcc5530 | 235 | #endif |
54b50199 | 236 | |
97f5f0cd | 237 | #ifdef CONFIG_MAGIC_SYSRQ |
5f733e8a | 238 | /* Note: sysrq code uses its own private copy */ |
8eaede49 | 239 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 240 | |
6f8fd1d7 | 241 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
242 | void __user *buffer, size_t *lenp, |
243 | loff_t *ppos) | |
244 | { | |
245 | int error; | |
246 | ||
247 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
248 | if (error) | |
249 | return error; | |
250 | ||
251 | if (write) | |
252 | sysrq_toggle_support(__sysrq_enabled); | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | #endif | |
258 | ||
d8217f07 EB |
259 | static struct ctl_table kern_table[]; |
260 | static struct ctl_table vm_table[]; | |
261 | static struct ctl_table fs_table[]; | |
262 | static struct ctl_table debug_table[]; | |
263 | static struct ctl_table dev_table[]; | |
264 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
265 | #ifdef CONFIG_EPOLL |
266 | extern struct ctl_table epoll_table[]; | |
267 | #endif | |
1da177e4 | 268 | |
ceb18132 LR |
269 | #ifdef CONFIG_FW_LOADER_USER_HELPER |
270 | extern struct ctl_table firmware_config_table[]; | |
271 | #endif | |
272 | ||
1da177e4 LT |
273 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT |
274 | int sysctl_legacy_va_layout; | |
275 | #endif | |
276 | ||
1da177e4 LT |
277 | /* The default sysctl tables: */ |
278 | ||
de4e83bd | 279 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 280 | { |
1da177e4 LT |
281 | .procname = "kernel", |
282 | .mode = 0555, | |
283 | .child = kern_table, | |
284 | }, | |
285 | { | |
1da177e4 LT |
286 | .procname = "vm", |
287 | .mode = 0555, | |
288 | .child = vm_table, | |
289 | }, | |
1da177e4 | 290 | { |
1da177e4 LT |
291 | .procname = "fs", |
292 | .mode = 0555, | |
293 | .child = fs_table, | |
294 | }, | |
295 | { | |
1da177e4 LT |
296 | .procname = "debug", |
297 | .mode = 0555, | |
298 | .child = debug_table, | |
299 | }, | |
300 | { | |
1da177e4 LT |
301 | .procname = "dev", |
302 | .mode = 0555, | |
303 | .child = dev_table, | |
304 | }, | |
6fce56ec | 305 | { } |
1da177e4 LT |
306 | }; |
307 | ||
77e54a1f | 308 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
309 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
310 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
311 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
312 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 313 | #ifdef CONFIG_SMP |
1983a922 CE |
314 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
315 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
316 | #endif /* CONFIG_SMP */ |
317 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 318 | |
5e771905 MG |
319 | #ifdef CONFIG_COMPACTION |
320 | static int min_extfrag_threshold; | |
321 | static int max_extfrag_threshold = 1000; | |
322 | #endif | |
323 | ||
d8217f07 | 324 | static struct ctl_table kern_table[] = { |
2bba22c5 | 325 | { |
2bba22c5 MG |
326 | .procname = "sched_child_runs_first", |
327 | .data = &sysctl_sched_child_runs_first, | |
328 | .maxlen = sizeof(unsigned int), | |
329 | .mode = 0644, | |
6d456111 | 330 | .proc_handler = proc_dointvec, |
2bba22c5 | 331 | }, |
77e54a1f IM |
332 | #ifdef CONFIG_SCHED_DEBUG |
333 | { | |
b2be5e96 PZ |
334 | .procname = "sched_min_granularity_ns", |
335 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
336 | .maxlen = sizeof(unsigned int), |
337 | .mode = 0644, | |
702a7c76 | 338 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
339 | .extra1 = &min_sched_granularity_ns, |
340 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 341 | }, |
21805085 | 342 | { |
21805085 PZ |
343 | .procname = "sched_latency_ns", |
344 | .data = &sysctl_sched_latency, | |
345 | .maxlen = sizeof(unsigned int), | |
346 | .mode = 0644, | |
702a7c76 | 347 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
348 | .extra1 = &min_sched_granularity_ns, |
349 | .extra2 = &max_sched_granularity_ns, | |
350 | }, | |
77e54a1f | 351 | { |
77e54a1f IM |
352 | .procname = "sched_wakeup_granularity_ns", |
353 | .data = &sysctl_sched_wakeup_granularity, | |
354 | .maxlen = sizeof(unsigned int), | |
355 | .mode = 0644, | |
702a7c76 | 356 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
357 | .extra1 = &min_wakeup_granularity_ns, |
358 | .extra2 = &max_wakeup_granularity_ns, | |
359 | }, | |
cbee9f88 | 360 | #ifdef CONFIG_SMP |
1983a922 | 361 | { |
1983a922 CE |
362 | .procname = "sched_tunable_scaling", |
363 | .data = &sysctl_sched_tunable_scaling, | |
364 | .maxlen = sizeof(enum sched_tunable_scaling), | |
365 | .mode = 0644, | |
702a7c76 | 366 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
367 | .extra1 = &min_sched_tunable_scaling, |
368 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 369 | }, |
da84d961 | 370 | { |
d00535db | 371 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
372 | .data = &sysctl_sched_migration_cost, |
373 | .maxlen = sizeof(unsigned int), | |
374 | .mode = 0644, | |
6d456111 | 375 | .proc_handler = proc_dointvec, |
da84d961 | 376 | }, |
b82d9fdd | 377 | { |
b82d9fdd PZ |
378 | .procname = "sched_nr_migrate", |
379 | .data = &sysctl_sched_nr_migrate, | |
380 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 381 | .mode = 0644, |
6d456111 | 382 | .proc_handler = proc_dointvec, |
fa85ae24 | 383 | }, |
cb251765 MG |
384 | #ifdef CONFIG_SCHEDSTATS |
385 | { | |
386 | .procname = "sched_schedstats", | |
387 | .data = NULL, | |
388 | .maxlen = sizeof(unsigned int), | |
389 | .mode = 0644, | |
390 | .proc_handler = sysctl_schedstats, | |
391 | .extra1 = &zero, | |
392 | .extra2 = &one, | |
393 | }, | |
394 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
395 | #endif /* CONFIG_SMP */ |
396 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
397 | { |
398 | .procname = "numa_balancing_scan_delay_ms", | |
399 | .data = &sysctl_numa_balancing_scan_delay, | |
400 | .maxlen = sizeof(unsigned int), | |
401 | .mode = 0644, | |
402 | .proc_handler = proc_dointvec, | |
403 | }, | |
cbee9f88 PZ |
404 | { |
405 | .procname = "numa_balancing_scan_period_min_ms", | |
406 | .data = &sysctl_numa_balancing_scan_period_min, | |
407 | .maxlen = sizeof(unsigned int), | |
408 | .mode = 0644, | |
409 | .proc_handler = proc_dointvec, | |
410 | }, | |
411 | { | |
412 | .procname = "numa_balancing_scan_period_max_ms", | |
413 | .data = &sysctl_numa_balancing_scan_period_max, | |
414 | .maxlen = sizeof(unsigned int), | |
415 | .mode = 0644, | |
416 | .proc_handler = proc_dointvec, | |
417 | }, | |
6e5fb223 PZ |
418 | { |
419 | .procname = "numa_balancing_scan_size_mb", | |
420 | .data = &sysctl_numa_balancing_scan_size, | |
421 | .maxlen = sizeof(unsigned int), | |
422 | .mode = 0644, | |
64192658 KT |
423 | .proc_handler = proc_dointvec_minmax, |
424 | .extra1 = &one, | |
6e5fb223 | 425 | }, |
54a43d54 AK |
426 | { |
427 | .procname = "numa_balancing", | |
428 | .data = NULL, /* filled in by handler */ | |
429 | .maxlen = sizeof(unsigned int), | |
430 | .mode = 0644, | |
431 | .proc_handler = sysctl_numa_balancing, | |
432 | .extra1 = &zero, | |
433 | .extra2 = &one, | |
434 | }, | |
cbee9f88 PZ |
435 | #endif /* CONFIG_NUMA_BALANCING */ |
436 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 437 | { |
9f0c1e56 PZ |
438 | .procname = "sched_rt_period_us", |
439 | .data = &sysctl_sched_rt_period, | |
440 | .maxlen = sizeof(unsigned int), | |
441 | .mode = 0644, | |
6d456111 | 442 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
443 | }, |
444 | { | |
9f0c1e56 PZ |
445 | .procname = "sched_rt_runtime_us", |
446 | .data = &sysctl_sched_rt_runtime, | |
447 | .maxlen = sizeof(int), | |
448 | .mode = 0644, | |
6d456111 | 449 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 450 | }, |
ce0dbbbb CW |
451 | { |
452 | .procname = "sched_rr_timeslice_ms", | |
975e155e | 453 | .data = &sysctl_sched_rr_timeslice, |
ce0dbbbb CW |
454 | .maxlen = sizeof(int), |
455 | .mode = 0644, | |
456 | .proc_handler = sched_rr_handler, | |
457 | }, | |
5091faa4 MG |
458 | #ifdef CONFIG_SCHED_AUTOGROUP |
459 | { | |
460 | .procname = "sched_autogroup_enabled", | |
461 | .data = &sysctl_sched_autogroup_enabled, | |
462 | .maxlen = sizeof(unsigned int), | |
463 | .mode = 0644, | |
1747b21f | 464 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
465 | .extra1 = &zero, |
466 | .extra2 = &one, | |
467 | }, | |
468 | #endif | |
ec12cb7f PT |
469 | #ifdef CONFIG_CFS_BANDWIDTH |
470 | { | |
471 | .procname = "sched_cfs_bandwidth_slice_us", | |
472 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
473 | .maxlen = sizeof(unsigned int), | |
474 | .mode = 0644, | |
475 | .proc_handler = proc_dointvec_minmax, | |
476 | .extra1 = &one, | |
477 | }, | |
478 | #endif | |
8d5d0cfb QP |
479 | #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) |
480 | { | |
481 | .procname = "sched_energy_aware", | |
482 | .data = &sysctl_sched_energy_aware, | |
483 | .maxlen = sizeof(unsigned int), | |
484 | .mode = 0644, | |
485 | .proc_handler = sched_energy_aware_handler, | |
486 | .extra1 = &zero, | |
487 | .extra2 = &one, | |
488 | }, | |
489 | #endif | |
f20786ff PZ |
490 | #ifdef CONFIG_PROVE_LOCKING |
491 | { | |
f20786ff PZ |
492 | .procname = "prove_locking", |
493 | .data = &prove_locking, | |
494 | .maxlen = sizeof(int), | |
495 | .mode = 0644, | |
6d456111 | 496 | .proc_handler = proc_dointvec, |
f20786ff PZ |
497 | }, |
498 | #endif | |
499 | #ifdef CONFIG_LOCK_STAT | |
500 | { | |
f20786ff PZ |
501 | .procname = "lock_stat", |
502 | .data = &lock_stat, | |
503 | .maxlen = sizeof(int), | |
504 | .mode = 0644, | |
6d456111 | 505 | .proc_handler = proc_dointvec, |
f20786ff | 506 | }, |
77e54a1f | 507 | #endif |
1da177e4 | 508 | { |
1da177e4 LT |
509 | .procname = "panic", |
510 | .data = &panic_timeout, | |
511 | .maxlen = sizeof(int), | |
512 | .mode = 0644, | |
6d456111 | 513 | .proc_handler = proc_dointvec, |
1da177e4 | 514 | }, |
046d662f | 515 | #ifdef CONFIG_COREDUMP |
1da177e4 | 516 | { |
1da177e4 LT |
517 | .procname = "core_uses_pid", |
518 | .data = &core_uses_pid, | |
519 | .maxlen = sizeof(int), | |
520 | .mode = 0644, | |
6d456111 | 521 | .proc_handler = proc_dointvec, |
1da177e4 LT |
522 | }, |
523 | { | |
1da177e4 LT |
524 | .procname = "core_pattern", |
525 | .data = core_pattern, | |
71ce92f3 | 526 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 527 | .mode = 0644, |
54b50199 | 528 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 529 | }, |
a293980c | 530 | { |
a293980c NH |
531 | .procname = "core_pipe_limit", |
532 | .data = &core_pipe_limit, | |
533 | .maxlen = sizeof(unsigned int), | |
534 | .mode = 0644, | |
6d456111 | 535 | .proc_handler = proc_dointvec, |
a293980c | 536 | }, |
046d662f | 537 | #endif |
34f5a398 | 538 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 539 | { |
1da177e4 | 540 | .procname = "tainted", |
25ddbb18 | 541 | .maxlen = sizeof(long), |
34f5a398 | 542 | .mode = 0644, |
6d456111 | 543 | .proc_handler = proc_taint, |
1da177e4 | 544 | }, |
f4aacea2 KC |
545 | { |
546 | .procname = "sysctl_writes_strict", | |
547 | .data = &sysctl_writes_strict, | |
548 | .maxlen = sizeof(int), | |
549 | .mode = 0644, | |
550 | .proc_handler = proc_dointvec_minmax, | |
551 | .extra1 = &neg_one, | |
552 | .extra2 = &one, | |
553 | }, | |
34f5a398 | 554 | #endif |
9745512c AV |
555 | #ifdef CONFIG_LATENCYTOP |
556 | { | |
557 | .procname = "latencytop", | |
558 | .data = &latencytop_enabled, | |
559 | .maxlen = sizeof(int), | |
560 | .mode = 0644, | |
cb251765 | 561 | .proc_handler = sysctl_latencytop, |
9745512c AV |
562 | }, |
563 | #endif | |
1da177e4 LT |
564 | #ifdef CONFIG_BLK_DEV_INITRD |
565 | { | |
1da177e4 LT |
566 | .procname = "real-root-dev", |
567 | .data = &real_root_dev, | |
568 | .maxlen = sizeof(int), | |
569 | .mode = 0644, | |
6d456111 | 570 | .proc_handler = proc_dointvec, |
1da177e4 LT |
571 | }, |
572 | #endif | |
45807a1d | 573 | { |
45807a1d IM |
574 | .procname = "print-fatal-signals", |
575 | .data = &print_fatal_signals, | |
576 | .maxlen = sizeof(int), | |
577 | .mode = 0644, | |
6d456111 | 578 | .proc_handler = proc_dointvec, |
45807a1d | 579 | }, |
72c57ed5 | 580 | #ifdef CONFIG_SPARC |
1da177e4 | 581 | { |
1da177e4 LT |
582 | .procname = "reboot-cmd", |
583 | .data = reboot_command, | |
584 | .maxlen = 256, | |
585 | .mode = 0644, | |
6d456111 | 586 | .proc_handler = proc_dostring, |
1da177e4 LT |
587 | }, |
588 | { | |
1da177e4 LT |
589 | .procname = "stop-a", |
590 | .data = &stop_a_enabled, | |
591 | .maxlen = sizeof (int), | |
592 | .mode = 0644, | |
6d456111 | 593 | .proc_handler = proc_dointvec, |
1da177e4 LT |
594 | }, |
595 | { | |
1da177e4 LT |
596 | .procname = "scons-poweroff", |
597 | .data = &scons_pwroff, | |
598 | .maxlen = sizeof (int), | |
599 | .mode = 0644, | |
6d456111 | 600 | .proc_handler = proc_dointvec, |
1da177e4 LT |
601 | }, |
602 | #endif | |
0871420f DM |
603 | #ifdef CONFIG_SPARC64 |
604 | { | |
0871420f DM |
605 | .procname = "tsb-ratio", |
606 | .data = &sysctl_tsb_ratio, | |
607 | .maxlen = sizeof (int), | |
608 | .mode = 0644, | |
6d456111 | 609 | .proc_handler = proc_dointvec, |
0871420f DM |
610 | }, |
611 | #endif | |
1da177e4 LT |
612 | #ifdef __hppa__ |
613 | { | |
1da177e4 LT |
614 | .procname = "soft-power", |
615 | .data = &pwrsw_enabled, | |
616 | .maxlen = sizeof (int), | |
617 | .mode = 0644, | |
6d456111 | 618 | .proc_handler = proc_dointvec, |
1da177e4 | 619 | }, |
bf14e3b9 VG |
620 | #endif |
621 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 622 | { |
1da177e4 LT |
623 | .procname = "unaligned-trap", |
624 | .data = &unaligned_enabled, | |
625 | .maxlen = sizeof (int), | |
626 | .mode = 0644, | |
6d456111 | 627 | .proc_handler = proc_dointvec, |
1da177e4 LT |
628 | }, |
629 | #endif | |
630 | { | |
1da177e4 LT |
631 | .procname = "ctrl-alt-del", |
632 | .data = &C_A_D, | |
633 | .maxlen = sizeof(int), | |
634 | .mode = 0644, | |
6d456111 | 635 | .proc_handler = proc_dointvec, |
1da177e4 | 636 | }, |
606576ce | 637 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 638 | { |
b0fc494f SR |
639 | .procname = "ftrace_enabled", |
640 | .data = &ftrace_enabled, | |
641 | .maxlen = sizeof(int), | |
642 | .mode = 0644, | |
6d456111 | 643 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
644 | }, |
645 | #endif | |
f38f1d2a SR |
646 | #ifdef CONFIG_STACK_TRACER |
647 | { | |
f38f1d2a SR |
648 | .procname = "stack_tracer_enabled", |
649 | .data = &stack_tracer_enabled, | |
650 | .maxlen = sizeof(int), | |
651 | .mode = 0644, | |
6d456111 | 652 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
653 | }, |
654 | #endif | |
944ac425 SR |
655 | #ifdef CONFIG_TRACING |
656 | { | |
3299b4dd | 657 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
658 | .data = &ftrace_dump_on_oops, |
659 | .maxlen = sizeof(int), | |
660 | .mode = 0644, | |
6d456111 | 661 | .proc_handler = proc_dointvec, |
944ac425 | 662 | }, |
de7edd31 SRRH |
663 | { |
664 | .procname = "traceoff_on_warning", | |
665 | .data = &__disable_trace_on_warning, | |
666 | .maxlen = sizeof(__disable_trace_on_warning), | |
667 | .mode = 0644, | |
668 | .proc_handler = proc_dointvec, | |
669 | }, | |
0daa2302 SRRH |
670 | { |
671 | .procname = "tracepoint_printk", | |
672 | .data = &tracepoint_printk, | |
673 | .maxlen = sizeof(tracepoint_printk), | |
674 | .mode = 0644, | |
42391745 | 675 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 676 | }, |
944ac425 | 677 | #endif |
2965faa5 | 678 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
679 | { |
680 | .procname = "kexec_load_disabled", | |
681 | .data = &kexec_load_disabled, | |
682 | .maxlen = sizeof(int), | |
683 | .mode = 0644, | |
684 | /* only handle a transition from default "0" to "1" */ | |
685 | .proc_handler = proc_dointvec_minmax, | |
686 | .extra1 = &one, | |
687 | .extra2 = &one, | |
688 | }, | |
689 | #endif | |
a1ef5adb | 690 | #ifdef CONFIG_MODULES |
1da177e4 | 691 | { |
1da177e4 LT |
692 | .procname = "modprobe", |
693 | .data = &modprobe_path, | |
694 | .maxlen = KMOD_PATH_LEN, | |
695 | .mode = 0644, | |
6d456111 | 696 | .proc_handler = proc_dostring, |
1da177e4 | 697 | }, |
3d43321b | 698 | { |
3d43321b KC |
699 | .procname = "modules_disabled", |
700 | .data = &modules_disabled, | |
701 | .maxlen = sizeof(int), | |
702 | .mode = 0644, | |
703 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 704 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
705 | .extra1 = &one, |
706 | .extra2 = &one, | |
707 | }, | |
1da177e4 | 708 | #endif |
86d56134 | 709 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 710 | { |
1da177e4 | 711 | .procname = "hotplug", |
312c004d KS |
712 | .data = &uevent_helper, |
713 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 714 | .mode = 0644, |
6d456111 | 715 | .proc_handler = proc_dostring, |
1da177e4 | 716 | }, |
86d56134 | 717 | #endif |
1da177e4 LT |
718 | #ifdef CONFIG_CHR_DEV_SG |
719 | { | |
1da177e4 LT |
720 | .procname = "sg-big-buff", |
721 | .data = &sg_big_buff, | |
722 | .maxlen = sizeof (int), | |
723 | .mode = 0444, | |
6d456111 | 724 | .proc_handler = proc_dointvec, |
1da177e4 LT |
725 | }, |
726 | #endif | |
727 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
728 | { | |
1da177e4 LT |
729 | .procname = "acct", |
730 | .data = &acct_parm, | |
731 | .maxlen = 3*sizeof(int), | |
732 | .mode = 0644, | |
6d456111 | 733 | .proc_handler = proc_dointvec, |
1da177e4 LT |
734 | }, |
735 | #endif | |
1da177e4 LT |
736 | #ifdef CONFIG_MAGIC_SYSRQ |
737 | { | |
1da177e4 | 738 | .procname = "sysrq", |
5d6f647f | 739 | .data = &__sysrq_enabled, |
1da177e4 LT |
740 | .maxlen = sizeof (int), |
741 | .mode = 0644, | |
97f5f0cd | 742 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
743 | }, |
744 | #endif | |
d6f8ff73 | 745 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 746 | { |
1da177e4 | 747 | .procname = "cad_pid", |
9ec52099 | 748 | .data = NULL, |
1da177e4 LT |
749 | .maxlen = sizeof (int), |
750 | .mode = 0600, | |
6d456111 | 751 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 752 | }, |
d6f8ff73 | 753 | #endif |
1da177e4 | 754 | { |
1da177e4 | 755 | .procname = "threads-max", |
16db3d3f | 756 | .data = NULL, |
1da177e4 LT |
757 | .maxlen = sizeof(int), |
758 | .mode = 0644, | |
16db3d3f | 759 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
760 | }, |
761 | { | |
1da177e4 LT |
762 | .procname = "random", |
763 | .mode = 0555, | |
764 | .child = random_table, | |
765 | }, | |
17f60a7d EP |
766 | { |
767 | .procname = "usermodehelper", | |
768 | .mode = 0555, | |
769 | .child = usermodehelper_table, | |
770 | }, | |
ceb18132 LR |
771 | #ifdef CONFIG_FW_LOADER_USER_HELPER |
772 | { | |
773 | .procname = "firmware_config", | |
774 | .mode = 0555, | |
775 | .child = firmware_config_table, | |
776 | }, | |
777 | #endif | |
1da177e4 | 778 | { |
1da177e4 LT |
779 | .procname = "overflowuid", |
780 | .data = &overflowuid, | |
781 | .maxlen = sizeof(int), | |
782 | .mode = 0644, | |
6d456111 | 783 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
784 | .extra1 = &minolduid, |
785 | .extra2 = &maxolduid, | |
786 | }, | |
787 | { | |
1da177e4 LT |
788 | .procname = "overflowgid", |
789 | .data = &overflowgid, | |
790 | .maxlen = sizeof(int), | |
791 | .mode = 0644, | |
6d456111 | 792 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
793 | .extra1 = &minolduid, |
794 | .extra2 = &maxolduid, | |
795 | }, | |
347a8dc3 | 796 | #ifdef CONFIG_S390 |
1da177e4 LT |
797 | #ifdef CONFIG_MATHEMU |
798 | { | |
1da177e4 LT |
799 | .procname = "ieee_emulation_warnings", |
800 | .data = &sysctl_ieee_emulation_warnings, | |
801 | .maxlen = sizeof(int), | |
802 | .mode = 0644, | |
6d456111 | 803 | .proc_handler = proc_dointvec, |
1da177e4 | 804 | }, |
1da177e4 LT |
805 | #endif |
806 | { | |
1da177e4 | 807 | .procname = "userprocess_debug", |
ab3c68ee | 808 | .data = &show_unhandled_signals, |
1da177e4 LT |
809 | .maxlen = sizeof(int), |
810 | .mode = 0644, | |
6d456111 | 811 | .proc_handler = proc_dointvec, |
1da177e4 LT |
812 | }, |
813 | #endif | |
814 | { | |
1da177e4 LT |
815 | .procname = "pid_max", |
816 | .data = &pid_max, | |
817 | .maxlen = sizeof (int), | |
818 | .mode = 0644, | |
6d456111 | 819 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
820 | .extra1 = &pid_max_min, |
821 | .extra2 = &pid_max_max, | |
822 | }, | |
823 | { | |
1da177e4 LT |
824 | .procname = "panic_on_oops", |
825 | .data = &panic_on_oops, | |
826 | .maxlen = sizeof(int), | |
827 | .mode = 0644, | |
6d456111 | 828 | .proc_handler = proc_dointvec, |
1da177e4 | 829 | }, |
81c9d43f FT |
830 | { |
831 | .procname = "panic_print", | |
832 | .data = &panic_print, | |
833 | .maxlen = sizeof(unsigned long), | |
834 | .mode = 0644, | |
835 | .proc_handler = proc_doulongvec_minmax, | |
836 | }, | |
7ef3d2fd JP |
837 | #if defined CONFIG_PRINTK |
838 | { | |
7ef3d2fd JP |
839 | .procname = "printk", |
840 | .data = &console_loglevel, | |
841 | .maxlen = 4*sizeof(int), | |
842 | .mode = 0644, | |
6d456111 | 843 | .proc_handler = proc_dointvec, |
7ef3d2fd | 844 | }, |
1da177e4 | 845 | { |
1da177e4 | 846 | .procname = "printk_ratelimit", |
717115e1 | 847 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
848 | .maxlen = sizeof(int), |
849 | .mode = 0644, | |
6d456111 | 850 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
851 | }, |
852 | { | |
1da177e4 | 853 | .procname = "printk_ratelimit_burst", |
717115e1 | 854 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
855 | .maxlen = sizeof(int), |
856 | .mode = 0644, | |
6d456111 | 857 | .proc_handler = proc_dointvec, |
1da177e4 | 858 | }, |
af91322e | 859 | { |
af91322e DY |
860 | .procname = "printk_delay", |
861 | .data = &printk_delay_msec, | |
862 | .maxlen = sizeof(int), | |
863 | .mode = 0644, | |
6d456111 | 864 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
865 | .extra1 = &zero, |
866 | .extra2 = &ten_thousand, | |
867 | }, | |
750afe7b BP |
868 | { |
869 | .procname = "printk_devkmsg", | |
870 | .data = devkmsg_log_str, | |
871 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
872 | .mode = 0644, | |
873 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
874 | }, | |
eaf06b24 DR |
875 | { |
876 | .procname = "dmesg_restrict", | |
877 | .data = &dmesg_restrict, | |
878 | .maxlen = sizeof(int), | |
879 | .mode = 0644, | |
620f6e8e | 880 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
881 | .extra1 = &zero, |
882 | .extra2 = &one, | |
883 | }, | |
455cd5ab DR |
884 | { |
885 | .procname = "kptr_restrict", | |
886 | .data = &kptr_restrict, | |
887 | .maxlen = sizeof(int), | |
888 | .mode = 0644, | |
620f6e8e | 889 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
890 | .extra1 = &zero, |
891 | .extra2 = &two, | |
892 | }, | |
df6e61d4 | 893 | #endif |
1da177e4 | 894 | { |
1da177e4 LT |
895 | .procname = "ngroups_max", |
896 | .data = &ngroups_max, | |
897 | .maxlen = sizeof (int), | |
898 | .mode = 0444, | |
6d456111 | 899 | .proc_handler = proc_dointvec, |
1da177e4 | 900 | }, |
73efc039 DB |
901 | { |
902 | .procname = "cap_last_cap", | |
903 | .data = (void *)&cap_last_cap, | |
904 | .maxlen = sizeof(int), | |
905 | .mode = 0444, | |
906 | .proc_handler = proc_dointvec, | |
907 | }, | |
58687acb | 908 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 909 | { |
58687acb | 910 | .procname = "watchdog", |
7feeb9cd TG |
911 | .data = &watchdog_user_enabled, |
912 | .maxlen = sizeof(int), | |
913 | .mode = 0644, | |
195daf66 | 914 | .proc_handler = proc_watchdog, |
586692a5 MSB |
915 | .extra1 = &zero, |
916 | .extra2 = &one, | |
58687acb DZ |
917 | }, |
918 | { | |
919 | .procname = "watchdog_thresh", | |
586692a5 | 920 | .data = &watchdog_thresh, |
58687acb DZ |
921 | .maxlen = sizeof(int), |
922 | .mode = 0644, | |
195daf66 | 923 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 924 | .extra1 = &zero, |
58687acb | 925 | .extra2 = &sixty, |
504d7cf1 | 926 | }, |
195daf66 UO |
927 | { |
928 | .procname = "nmi_watchdog", | |
7feeb9cd TG |
929 | .data = &nmi_watchdog_user_enabled, |
930 | .maxlen = sizeof(int), | |
51d4052b | 931 | .mode = NMI_WATCHDOG_SYSCTL_PERM, |
195daf66 UO |
932 | .proc_handler = proc_nmi_watchdog, |
933 | .extra1 = &zero, | |
195daf66 | 934 | .extra2 = &one, |
195daf66 | 935 | }, |
05a4a952 NP |
936 | { |
937 | .procname = "watchdog_cpumask", | |
938 | .data = &watchdog_cpumask_bits, | |
939 | .maxlen = NR_CPUS, | |
940 | .mode = 0644, | |
941 | .proc_handler = proc_watchdog_cpumask, | |
942 | }, | |
943 | #ifdef CONFIG_SOFTLOCKUP_DETECTOR | |
195daf66 UO |
944 | { |
945 | .procname = "soft_watchdog", | |
7feeb9cd TG |
946 | .data = &soft_watchdog_user_enabled, |
947 | .maxlen = sizeof(int), | |
948 | .mode = 0644, | |
195daf66 UO |
949 | .proc_handler = proc_soft_watchdog, |
950 | .extra1 = &zero, | |
951 | .extra2 = &one, | |
952 | }, | |
2508ce18 DZ |
953 | { |
954 | .procname = "softlockup_panic", | |
955 | .data = &softlockup_panic, | |
956 | .maxlen = sizeof(int), | |
957 | .mode = 0644, | |
958 | .proc_handler = proc_dointvec_minmax, | |
959 | .extra1 = &zero, | |
960 | .extra2 = &one, | |
961 | }, | |
05a4a952 | 962 | #ifdef CONFIG_SMP |
ac1f5912 | 963 | { |
05a4a952 NP |
964 | .procname = "softlockup_all_cpu_backtrace", |
965 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
ac1f5912 DZ |
966 | .maxlen = sizeof(int), |
967 | .mode = 0644, | |
968 | .proc_handler = proc_dointvec_minmax, | |
969 | .extra1 = &zero, | |
970 | .extra2 = &one, | |
971 | }, | |
05a4a952 | 972 | #endif /* CONFIG_SMP */ |
ac1f5912 | 973 | #endif |
05a4a952 | 974 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
ed235875 | 975 | { |
05a4a952 NP |
976 | .procname = "hardlockup_panic", |
977 | .data = &hardlockup_panic, | |
ed235875 AT |
978 | .maxlen = sizeof(int), |
979 | .mode = 0644, | |
980 | .proc_handler = proc_dointvec_minmax, | |
981 | .extra1 = &zero, | |
982 | .extra2 = &one, | |
983 | }, | |
05a4a952 | 984 | #ifdef CONFIG_SMP |
55537871 JK |
985 | { |
986 | .procname = "hardlockup_all_cpu_backtrace", | |
987 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
988 | .maxlen = sizeof(int), | |
989 | .mode = 0644, | |
990 | .proc_handler = proc_dointvec_minmax, | |
991 | .extra1 = &zero, | |
992 | .extra2 = &one, | |
993 | }, | |
ed235875 | 994 | #endif /* CONFIG_SMP */ |
5dc30558 | 995 | #endif |
05a4a952 NP |
996 | #endif |
997 | ||
5dc30558 DZ |
998 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
999 | { | |
1000 | .procname = "unknown_nmi_panic", | |
1001 | .data = &unknown_nmi_panic, | |
1002 | .maxlen = sizeof (int), | |
1003 | .mode = 0644, | |
1004 | .proc_handler = proc_dointvec, | |
1005 | }, | |
504d7cf1 | 1006 | #endif |
1da177e4 | 1007 | #if defined(CONFIG_X86) |
8da5adda | 1008 | { |
8da5adda DZ |
1009 | .procname = "panic_on_unrecovered_nmi", |
1010 | .data = &panic_on_unrecovered_nmi, | |
1011 | .maxlen = sizeof(int), | |
1012 | .mode = 0644, | |
6d456111 | 1013 | .proc_handler = proc_dointvec, |
8da5adda | 1014 | }, |
5211a242 | 1015 | { |
5211a242 KG |
1016 | .procname = "panic_on_io_nmi", |
1017 | .data = &panic_on_io_nmi, | |
1018 | .maxlen = sizeof(int), | |
1019 | .mode = 0644, | |
6d456111 | 1020 | .proc_handler = proc_dointvec, |
5211a242 | 1021 | }, |
55af7796 MH |
1022 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
1023 | { | |
1024 | .procname = "panic_on_stackoverflow", | |
1025 | .data = &sysctl_panic_on_stackoverflow, | |
1026 | .maxlen = sizeof(int), | |
1027 | .mode = 0644, | |
1028 | .proc_handler = proc_dointvec, | |
1029 | }, | |
1030 | #endif | |
1da177e4 | 1031 | { |
1da177e4 LT |
1032 | .procname = "bootloader_type", |
1033 | .data = &bootloader_type, | |
1034 | .maxlen = sizeof (int), | |
1035 | .mode = 0444, | |
6d456111 | 1036 | .proc_handler = proc_dointvec, |
1da177e4 | 1037 | }, |
5031296c | 1038 | { |
5031296c PA |
1039 | .procname = "bootloader_version", |
1040 | .data = &bootloader_version, | |
1041 | .maxlen = sizeof (int), | |
1042 | .mode = 0444, | |
6d456111 | 1043 | .proc_handler = proc_dointvec, |
5031296c | 1044 | }, |
6e7c4025 | 1045 | { |
6e7c4025 IM |
1046 | .procname = "io_delay_type", |
1047 | .data = &io_delay_type, | |
1048 | .maxlen = sizeof(int), | |
1049 | .mode = 0644, | |
6d456111 | 1050 | .proc_handler = proc_dointvec, |
6e7c4025 | 1051 | }, |
1da177e4 | 1052 | #endif |
7a9166e3 | 1053 | #if defined(CONFIG_MMU) |
1da177e4 | 1054 | { |
1da177e4 LT |
1055 | .procname = "randomize_va_space", |
1056 | .data = &randomize_va_space, | |
1057 | .maxlen = sizeof(int), | |
1058 | .mode = 0644, | |
6d456111 | 1059 | .proc_handler = proc_dointvec, |
1da177e4 | 1060 | }, |
7a9166e3 | 1061 | #endif |
0152fb37 | 1062 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1063 | { |
951f22d5 MS |
1064 | .procname = "spin_retry", |
1065 | .data = &spin_retry, | |
1066 | .maxlen = sizeof (int), | |
1067 | .mode = 0644, | |
6d456111 | 1068 | .proc_handler = proc_dointvec, |
951f22d5 | 1069 | }, |
c255d844 | 1070 | #endif |
673d5b43 | 1071 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1072 | { |
c255d844 | 1073 | .procname = "acpi_video_flags", |
77afcf78 | 1074 | .data = &acpi_realmode_flags, |
c255d844 PM |
1075 | .maxlen = sizeof (unsigned long), |
1076 | .mode = 0644, | |
6d456111 | 1077 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1078 | }, |
d2b176ed | 1079 | #endif |
b6fca725 | 1080 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1081 | { |
d2b176ed JS |
1082 | .procname = "ignore-unaligned-usertrap", |
1083 | .data = &no_unaligned_warning, | |
1084 | .maxlen = sizeof (int), | |
1085 | .mode = 0644, | |
6d456111 | 1086 | .proc_handler = proc_dointvec, |
d2b176ed | 1087 | }, |
b6fca725 VG |
1088 | #endif |
1089 | #ifdef CONFIG_IA64 | |
88fc241f | 1090 | { |
88fc241f DC |
1091 | .procname = "unaligned-dump-stack", |
1092 | .data = &unaligned_dump_stack, | |
1093 | .maxlen = sizeof (int), | |
1094 | .mode = 0644, | |
6d456111 | 1095 | .proc_handler = proc_dointvec, |
88fc241f | 1096 | }, |
bebfa101 | 1097 | #endif |
e162b39a MSB |
1098 | #ifdef CONFIG_DETECT_HUNG_TASK |
1099 | { | |
e162b39a MSB |
1100 | .procname = "hung_task_panic", |
1101 | .data = &sysctl_hung_task_panic, | |
1102 | .maxlen = sizeof(int), | |
1103 | .mode = 0644, | |
6d456111 | 1104 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1105 | .extra1 = &zero, |
1106 | .extra2 = &one, | |
1107 | }, | |
82a1fcb9 | 1108 | { |
82a1fcb9 IM |
1109 | .procname = "hung_task_check_count", |
1110 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1111 | .maxlen = sizeof(int), |
82a1fcb9 | 1112 | .mode = 0644, |
cd64647f LZ |
1113 | .proc_handler = proc_dointvec_minmax, |
1114 | .extra1 = &zero, | |
82a1fcb9 IM |
1115 | }, |
1116 | { | |
82a1fcb9 IM |
1117 | .procname = "hung_task_timeout_secs", |
1118 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1119 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1120 | .mode = 0644, |
6d456111 | 1121 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1122 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 | 1123 | }, |
a2e51445 DV |
1124 | { |
1125 | .procname = "hung_task_check_interval_secs", | |
1126 | .data = &sysctl_hung_task_check_interval_secs, | |
1127 | .maxlen = sizeof(unsigned long), | |
1128 | .mode = 0644, | |
1129 | .proc_handler = proc_dohung_task_timeout_secs, | |
1130 | .extra2 = &hung_task_timeout_max, | |
1131 | }, | |
82a1fcb9 | 1132 | { |
82a1fcb9 IM |
1133 | .procname = "hung_task_warnings", |
1134 | .data = &sysctl_hung_task_warnings, | |
270750db | 1135 | .maxlen = sizeof(int), |
82a1fcb9 | 1136 | .mode = 0644, |
270750db AT |
1137 | .proc_handler = proc_dointvec_minmax, |
1138 | .extra1 = &neg_one, | |
82a1fcb9 | 1139 | }, |
c4f3b63f | 1140 | #endif |
23f78d4a IM |
1141 | #ifdef CONFIG_RT_MUTEXES |
1142 | { | |
23f78d4a IM |
1143 | .procname = "max_lock_depth", |
1144 | .data = &max_lock_depth, | |
1145 | .maxlen = sizeof(int), | |
1146 | .mode = 0644, | |
6d456111 | 1147 | .proc_handler = proc_dointvec, |
23f78d4a | 1148 | }, |
5096add8 | 1149 | #endif |
10a0a8d4 | 1150 | { |
10a0a8d4 JF |
1151 | .procname = "poweroff_cmd", |
1152 | .data = &poweroff_cmd, | |
1153 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1154 | .mode = 0644, | |
6d456111 | 1155 | .proc_handler = proc_dostring, |
10a0a8d4 | 1156 | }, |
0b77f5bf DH |
1157 | #ifdef CONFIG_KEYS |
1158 | { | |
0b77f5bf DH |
1159 | .procname = "keys", |
1160 | .mode = 0555, | |
1161 | .child = key_sysctls, | |
1162 | }, | |
1163 | #endif | |
cdd6c482 | 1164 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1165 | /* |
1166 | * User-space scripts rely on the existence of this file | |
1167 | * as a feature check for perf_events being enabled. | |
1168 | * | |
1169 | * So it's an ABI, do not remove! | |
1170 | */ | |
1ccd1549 | 1171 | { |
cdd6c482 IM |
1172 | .procname = "perf_event_paranoid", |
1173 | .data = &sysctl_perf_event_paranoid, | |
1174 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1175 | .mode = 0644, |
6d456111 | 1176 | .proc_handler = proc_dointvec, |
1ccd1549 | 1177 | }, |
c5078f78 | 1178 | { |
cdd6c482 IM |
1179 | .procname = "perf_event_mlock_kb", |
1180 | .data = &sysctl_perf_event_mlock, | |
1181 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1182 | .mode = 0644, |
6d456111 | 1183 | .proc_handler = proc_dointvec, |
c5078f78 | 1184 | }, |
a78ac325 | 1185 | { |
cdd6c482 IM |
1186 | .procname = "perf_event_max_sample_rate", |
1187 | .data = &sysctl_perf_event_sample_rate, | |
1188 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1189 | .mode = 0644, |
163ec435 | 1190 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1191 | .extra1 = &one, |
a78ac325 | 1192 | }, |
14c63f17 DH |
1193 | { |
1194 | .procname = "perf_cpu_time_max_percent", | |
1195 | .data = &sysctl_perf_cpu_time_max_percent, | |
1196 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1197 | .mode = 0644, | |
1198 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1199 | .extra1 = &zero, | |
1200 | .extra2 = &one_hundred, | |
1201 | }, | |
c5dfd78e ACM |
1202 | { |
1203 | .procname = "perf_event_max_stack", | |
a831100a | 1204 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1205 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1206 | .mode = 0644, | |
1207 | .proc_handler = perf_event_max_stack_handler, | |
1208 | .extra1 = &zero, | |
1209 | .extra2 = &six_hundred_forty_kb, | |
1210 | }, | |
c85b0334 ACM |
1211 | { |
1212 | .procname = "perf_event_max_contexts_per_stack", | |
1213 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1214 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1215 | .mode = 0644, | |
1216 | .proc_handler = perf_event_max_stack_handler, | |
1217 | .extra1 = &zero, | |
1218 | .extra2 = &one_thousand, | |
1219 | }, | |
cb684b5b | 1220 | #endif |
9e3961a0 PB |
1221 | { |
1222 | .procname = "panic_on_warn", | |
1223 | .data = &panic_on_warn, | |
1224 | .maxlen = sizeof(int), | |
1225 | .mode = 0644, | |
1226 | .proc_handler = proc_dointvec_minmax, | |
1227 | .extra1 = &zero, | |
1228 | .extra2 = &one, | |
1229 | }, | |
bc7a34b8 TG |
1230 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1231 | { | |
1232 | .procname = "timer_migration", | |
1233 | .data = &sysctl_timer_migration, | |
1234 | .maxlen = sizeof(unsigned int), | |
1235 | .mode = 0644, | |
1236 | .proc_handler = timer_migration_handler, | |
b94bf594 MJ |
1237 | .extra1 = &zero, |
1238 | .extra2 = &one, | |
bc7a34b8 | 1239 | }, |
1be7f75d AS |
1240 | #endif |
1241 | #ifdef CONFIG_BPF_SYSCALL | |
1242 | { | |
1243 | .procname = "unprivileged_bpf_disabled", | |
1244 | .data = &sysctl_unprivileged_bpf_disabled, | |
1245 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1246 | .mode = 0644, | |
1247 | /* only handle a transition from default "0" to "1" */ | |
1248 | .proc_handler = proc_dointvec_minmax, | |
1249 | .extra1 = &one, | |
1250 | .extra2 = &one, | |
1251 | }, | |
492ecee8 AS |
1252 | { |
1253 | .procname = "bpf_stats_enabled", | |
1254 | .data = &sysctl_bpf_stats_enabled, | |
1255 | .maxlen = sizeof(sysctl_bpf_stats_enabled), | |
1256 | .mode = 0644, | |
1257 | .proc_handler = proc_dointvec_minmax_bpf_stats, | |
1258 | .extra1 = &zero, | |
1259 | .extra2 = &one, | |
1260 | }, | |
3fcc5530 | 1261 | #endif |
088e9d25 DBO |
1262 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) |
1263 | { | |
1264 | .procname = "panic_on_rcu_stall", | |
1265 | .data = &sysctl_panic_on_rcu_stall, | |
1266 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1267 | .mode = 0644, | |
1268 | .proc_handler = proc_dointvec_minmax, | |
1269 | .extra1 = &zero, | |
1270 | .extra2 = &one, | |
1271 | }, | |
964c9dff AP |
1272 | #endif |
1273 | #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE | |
1274 | { | |
1275 | .procname = "stack_erasing", | |
1276 | .data = NULL, | |
1277 | .maxlen = sizeof(int), | |
1278 | .mode = 0600, | |
1279 | .proc_handler = stack_erasing_sysctl, | |
1280 | .extra1 = &zero, | |
1281 | .extra2 = &one, | |
1282 | }, | |
bc7a34b8 | 1283 | #endif |
6fce56ec | 1284 | { } |
1da177e4 LT |
1285 | }; |
1286 | ||
d8217f07 | 1287 | static struct ctl_table vm_table[] = { |
1da177e4 | 1288 | { |
1da177e4 LT |
1289 | .procname = "overcommit_memory", |
1290 | .data = &sysctl_overcommit_memory, | |
1291 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1292 | .mode = 0644, | |
cb16e95f PH |
1293 | .proc_handler = proc_dointvec_minmax, |
1294 | .extra1 = &zero, | |
1295 | .extra2 = &two, | |
1da177e4 | 1296 | }, |
fadd8fbd | 1297 | { |
fadd8fbd KH |
1298 | .procname = "panic_on_oom", |
1299 | .data = &sysctl_panic_on_oom, | |
1300 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1301 | .mode = 0644, | |
cb16e95f PH |
1302 | .proc_handler = proc_dointvec_minmax, |
1303 | .extra1 = &zero, | |
1304 | .extra2 = &two, | |
fadd8fbd | 1305 | }, |
fe071d7e | 1306 | { |
fe071d7e DR |
1307 | .procname = "oom_kill_allocating_task", |
1308 | .data = &sysctl_oom_kill_allocating_task, | |
1309 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1310 | .mode = 0644, | |
6d456111 | 1311 | .proc_handler = proc_dointvec, |
fe071d7e | 1312 | }, |
fef1bdd6 | 1313 | { |
fef1bdd6 DR |
1314 | .procname = "oom_dump_tasks", |
1315 | .data = &sysctl_oom_dump_tasks, | |
1316 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1317 | .mode = 0644, | |
6d456111 | 1318 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1319 | }, |
1da177e4 | 1320 | { |
1da177e4 LT |
1321 | .procname = "overcommit_ratio", |
1322 | .data = &sysctl_overcommit_ratio, | |
1323 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1324 | .mode = 0644, | |
49f0ce5f JM |
1325 | .proc_handler = overcommit_ratio_handler, |
1326 | }, | |
1327 | { | |
1328 | .procname = "overcommit_kbytes", | |
1329 | .data = &sysctl_overcommit_kbytes, | |
1330 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1331 | .mode = 0644, | |
1332 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1333 | }, |
1334 | { | |
1da177e4 LT |
1335 | .procname = "page-cluster", |
1336 | .data = &page_cluster, | |
1337 | .maxlen = sizeof(int), | |
1338 | .mode = 0644, | |
cb16e95f PH |
1339 | .proc_handler = proc_dointvec_minmax, |
1340 | .extra1 = &zero, | |
1da177e4 LT |
1341 | }, |
1342 | { | |
1da177e4 LT |
1343 | .procname = "dirty_background_ratio", |
1344 | .data = &dirty_background_ratio, | |
1345 | .maxlen = sizeof(dirty_background_ratio), | |
1346 | .mode = 0644, | |
6d456111 | 1347 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1348 | .extra1 = &zero, |
1349 | .extra2 = &one_hundred, | |
1350 | }, | |
2da02997 | 1351 | { |
2da02997 DR |
1352 | .procname = "dirty_background_bytes", |
1353 | .data = &dirty_background_bytes, | |
1354 | .maxlen = sizeof(dirty_background_bytes), | |
1355 | .mode = 0644, | |
6d456111 | 1356 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1357 | .extra1 = &one_ul, |
2da02997 | 1358 | }, |
1da177e4 | 1359 | { |
1da177e4 LT |
1360 | .procname = "dirty_ratio", |
1361 | .data = &vm_dirty_ratio, | |
1362 | .maxlen = sizeof(vm_dirty_ratio), | |
1363 | .mode = 0644, | |
6d456111 | 1364 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1365 | .extra1 = &zero, |
1366 | .extra2 = &one_hundred, | |
1367 | }, | |
2da02997 | 1368 | { |
2da02997 DR |
1369 | .procname = "dirty_bytes", |
1370 | .data = &vm_dirty_bytes, | |
1371 | .maxlen = sizeof(vm_dirty_bytes), | |
1372 | .mode = 0644, | |
6d456111 | 1373 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1374 | .extra1 = &dirty_bytes_min, |
2da02997 | 1375 | }, |
1da177e4 | 1376 | { |
1da177e4 | 1377 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1378 | .data = &dirty_writeback_interval, |
1379 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1380 | .mode = 0644, |
6d456111 | 1381 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1382 | }, |
1383 | { | |
1da177e4 | 1384 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1385 | .data = &dirty_expire_interval, |
1386 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1387 | .mode = 0644, |
cb16e95f PH |
1388 | .proc_handler = proc_dointvec_minmax, |
1389 | .extra1 = &zero, | |
1da177e4 | 1390 | }, |
1efff914 TT |
1391 | { |
1392 | .procname = "dirtytime_expire_seconds", | |
1393 | .data = &dirtytime_expire_interval, | |
2d87b309 | 1394 | .maxlen = sizeof(dirtytime_expire_interval), |
1efff914 TT |
1395 | .mode = 0644, |
1396 | .proc_handler = dirtytime_interval_handler, | |
1397 | .extra1 = &zero, | |
1398 | }, | |
1da177e4 | 1399 | { |
1da177e4 LT |
1400 | .procname = "swappiness", |
1401 | .data = &vm_swappiness, | |
1402 | .maxlen = sizeof(vm_swappiness), | |
1403 | .mode = 0644, | |
6d456111 | 1404 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1405 | .extra1 = &zero, |
1406 | .extra2 = &one_hundred, | |
1407 | }, | |
1408 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1409 | { |
1da177e4 | 1410 | .procname = "nr_hugepages", |
e5ff2159 | 1411 | .data = NULL, |
1da177e4 LT |
1412 | .maxlen = sizeof(unsigned long), |
1413 | .mode = 0644, | |
6d456111 | 1414 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1415 | }, |
1416 | #ifdef CONFIG_NUMA | |
1417 | { | |
1418 | .procname = "nr_hugepages_mempolicy", | |
1419 | .data = NULL, | |
1420 | .maxlen = sizeof(unsigned long), | |
1421 | .mode = 0644, | |
1422 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 | 1423 | }, |
4518085e KW |
1424 | { |
1425 | .procname = "numa_stat", | |
1426 | .data = &sysctl_vm_numa_stat, | |
1427 | .maxlen = sizeof(int), | |
1428 | .mode = 0644, | |
1429 | .proc_handler = sysctl_vm_numa_stat_handler, | |
1430 | .extra1 = &zero, | |
1431 | .extra2 = &one, | |
1432 | }, | |
06808b08 | 1433 | #endif |
1da177e4 | 1434 | { |
1da177e4 LT |
1435 | .procname = "hugetlb_shm_group", |
1436 | .data = &sysctl_hugetlb_shm_group, | |
1437 | .maxlen = sizeof(gid_t), | |
1438 | .mode = 0644, | |
6d456111 | 1439 | .proc_handler = proc_dointvec, |
1da177e4 | 1440 | }, |
d1c3fb1f | 1441 | { |
d1c3fb1f | 1442 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1443 | .data = NULL, |
1444 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1445 | .mode = 0644, |
6d456111 | 1446 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1447 | }, |
1da177e4 LT |
1448 | #endif |
1449 | { | |
1da177e4 LT |
1450 | .procname = "lowmem_reserve_ratio", |
1451 | .data = &sysctl_lowmem_reserve_ratio, | |
1452 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1453 | .mode = 0644, | |
6d456111 | 1454 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1455 | }, |
9d0243bc | 1456 | { |
9d0243bc AM |
1457 | .procname = "drop_caches", |
1458 | .data = &sysctl_drop_caches, | |
1459 | .maxlen = sizeof(int), | |
1460 | .mode = 0644, | |
1461 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1462 | .extra1 = &one, |
5509a5d2 | 1463 | .extra2 = &four, |
9d0243bc | 1464 | }, |
76ab0f53 MG |
1465 | #ifdef CONFIG_COMPACTION |
1466 | { | |
1467 | .procname = "compact_memory", | |
1468 | .data = &sysctl_compact_memory, | |
1469 | .maxlen = sizeof(int), | |
1470 | .mode = 0200, | |
1471 | .proc_handler = sysctl_compaction_handler, | |
1472 | }, | |
5e771905 MG |
1473 | { |
1474 | .procname = "extfrag_threshold", | |
1475 | .data = &sysctl_extfrag_threshold, | |
1476 | .maxlen = sizeof(int), | |
1477 | .mode = 0644, | |
6b7e5cad | 1478 | .proc_handler = proc_dointvec_minmax, |
5e771905 MG |
1479 | .extra1 = &min_extfrag_threshold, |
1480 | .extra2 = &max_extfrag_threshold, | |
1481 | }, | |
5bbe3547 EM |
1482 | { |
1483 | .procname = "compact_unevictable_allowed", | |
1484 | .data = &sysctl_compact_unevictable_allowed, | |
1485 | .maxlen = sizeof(int), | |
1486 | .mode = 0644, | |
1487 | .proc_handler = proc_dointvec, | |
1488 | .extra1 = &zero, | |
1489 | .extra2 = &one, | |
1490 | }, | |
5e771905 | 1491 | |
76ab0f53 | 1492 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1493 | { |
1da177e4 LT |
1494 | .procname = "min_free_kbytes", |
1495 | .data = &min_free_kbytes, | |
1496 | .maxlen = sizeof(min_free_kbytes), | |
1497 | .mode = 0644, | |
6d456111 | 1498 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1499 | .extra1 = &zero, |
1500 | }, | |
1c30844d MG |
1501 | { |
1502 | .procname = "watermark_boost_factor", | |
1503 | .data = &watermark_boost_factor, | |
1504 | .maxlen = sizeof(watermark_boost_factor), | |
1505 | .mode = 0644, | |
1506 | .proc_handler = watermark_boost_factor_sysctl_handler, | |
1507 | .extra1 = &zero, | |
1508 | }, | |
795ae7a0 JW |
1509 | { |
1510 | .procname = "watermark_scale_factor", | |
1511 | .data = &watermark_scale_factor, | |
1512 | .maxlen = sizeof(watermark_scale_factor), | |
1513 | .mode = 0644, | |
1514 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1515 | .extra1 = &one, | |
1516 | .extra2 = &one_thousand, | |
1517 | }, | |
8ad4b1fb | 1518 | { |
8ad4b1fb RS |
1519 | .procname = "percpu_pagelist_fraction", |
1520 | .data = &percpu_pagelist_fraction, | |
1521 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1522 | .mode = 0644, | |
6d456111 | 1523 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1524 | .extra1 = &zero, |
8ad4b1fb | 1525 | }, |
1da177e4 LT |
1526 | #ifdef CONFIG_MMU |
1527 | { | |
1da177e4 LT |
1528 | .procname = "max_map_count", |
1529 | .data = &sysctl_max_map_count, | |
1530 | .maxlen = sizeof(sysctl_max_map_count), | |
1531 | .mode = 0644, | |
3e26120c | 1532 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1533 | .extra1 = &zero, |
1da177e4 | 1534 | }, |
dd8632a1 PM |
1535 | #else |
1536 | { | |
dd8632a1 PM |
1537 | .procname = "nr_trim_pages", |
1538 | .data = &sysctl_nr_trim_pages, | |
1539 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1540 | .mode = 0644, | |
6d456111 | 1541 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1542 | .extra1 = &zero, |
1543 | }, | |
1da177e4 LT |
1544 | #endif |
1545 | { | |
1da177e4 LT |
1546 | .procname = "laptop_mode", |
1547 | .data = &laptop_mode, | |
1548 | .maxlen = sizeof(laptop_mode), | |
1549 | .mode = 0644, | |
6d456111 | 1550 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1551 | }, |
1552 | { | |
1da177e4 LT |
1553 | .procname = "block_dump", |
1554 | .data = &block_dump, | |
1555 | .maxlen = sizeof(block_dump), | |
1556 | .mode = 0644, | |
6d456111 | 1557 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1558 | .extra1 = &zero, |
1559 | }, | |
1560 | { | |
1da177e4 LT |
1561 | .procname = "vfs_cache_pressure", |
1562 | .data = &sysctl_vfs_cache_pressure, | |
1563 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1564 | .mode = 0644, | |
6d456111 | 1565 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1566 | .extra1 = &zero, |
1567 | }, | |
1568 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1569 | { | |
1da177e4 LT |
1570 | .procname = "legacy_va_layout", |
1571 | .data = &sysctl_legacy_va_layout, | |
1572 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1573 | .mode = 0644, | |
6d456111 | 1574 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1575 | .extra1 = &zero, |
1576 | }, | |
1577 | #endif | |
1743660b CL |
1578 | #ifdef CONFIG_NUMA |
1579 | { | |
1743660b | 1580 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1581 | .data = &node_reclaim_mode, |
1582 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1583 | .mode = 0644, |
6d456111 | 1584 | .proc_handler = proc_dointvec, |
c84db23c | 1585 | .extra1 = &zero, |
1743660b | 1586 | }, |
9614634f | 1587 | { |
9614634f CL |
1588 | .procname = "min_unmapped_ratio", |
1589 | .data = &sysctl_min_unmapped_ratio, | |
1590 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1591 | .mode = 0644, | |
6d456111 | 1592 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1593 | .extra1 = &zero, |
1594 | .extra2 = &one_hundred, | |
1595 | }, | |
0ff38490 | 1596 | { |
0ff38490 CL |
1597 | .procname = "min_slab_ratio", |
1598 | .data = &sysctl_min_slab_ratio, | |
1599 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1600 | .mode = 0644, | |
6d456111 | 1601 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1602 | .extra1 = &zero, |
1603 | .extra2 = &one_hundred, | |
1604 | }, | |
e6e5494c | 1605 | #endif |
77461ab3 CL |
1606 | #ifdef CONFIG_SMP |
1607 | { | |
77461ab3 CL |
1608 | .procname = "stat_interval", |
1609 | .data = &sysctl_stat_interval, | |
1610 | .maxlen = sizeof(sysctl_stat_interval), | |
1611 | .mode = 0644, | |
6d456111 | 1612 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1613 | }, |
52b6f46b HD |
1614 | { |
1615 | .procname = "stat_refresh", | |
1616 | .data = NULL, | |
1617 | .maxlen = 0, | |
1618 | .mode = 0600, | |
1619 | .proc_handler = vmstat_refresh, | |
1620 | }, | |
77461ab3 | 1621 | #endif |
6e141546 | 1622 | #ifdef CONFIG_MMU |
ed032189 | 1623 | { |
ed032189 | 1624 | .procname = "mmap_min_addr", |
788084ab EP |
1625 | .data = &dac_mmap_min_addr, |
1626 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1627 | .mode = 0644, |
6d456111 | 1628 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1629 | }, |
6e141546 | 1630 | #endif |
f0c0b2b8 KH |
1631 | #ifdef CONFIG_NUMA |
1632 | { | |
f0c0b2b8 KH |
1633 | .procname = "numa_zonelist_order", |
1634 | .data = &numa_zonelist_order, | |
1635 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1636 | .mode = 0644, | |
6d456111 | 1637 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1638 | }, |
1639 | #endif | |
2b8232ce | 1640 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1641 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1642 | { |
e6e5494c | 1643 | .procname = "vdso_enabled", |
3d7ee969 AL |
1644 | #ifdef CONFIG_X86_32 |
1645 | .data = &vdso32_enabled, | |
1646 | .maxlen = sizeof(vdso32_enabled), | |
1647 | #else | |
e6e5494c IM |
1648 | .data = &vdso_enabled, |
1649 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1650 | #endif |
e6e5494c | 1651 | .mode = 0644, |
6d456111 | 1652 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1653 | .extra1 = &zero, |
1654 | }, | |
1da177e4 | 1655 | #endif |
195cf453 BG |
1656 | #ifdef CONFIG_HIGHMEM |
1657 | { | |
195cf453 BG |
1658 | .procname = "highmem_is_dirtyable", |
1659 | .data = &vm_highmem_is_dirtyable, | |
1660 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1661 | .mode = 0644, | |
6d456111 | 1662 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1663 | .extra1 = &zero, |
1664 | .extra2 = &one, | |
1665 | }, | |
1666 | #endif | |
6a46079c AK |
1667 | #ifdef CONFIG_MEMORY_FAILURE |
1668 | { | |
6a46079c AK |
1669 | .procname = "memory_failure_early_kill", |
1670 | .data = &sysctl_memory_failure_early_kill, | |
1671 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1672 | .mode = 0644, | |
6d456111 | 1673 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1674 | .extra1 = &zero, |
1675 | .extra2 = &one, | |
1676 | }, | |
1677 | { | |
6a46079c AK |
1678 | .procname = "memory_failure_recovery", |
1679 | .data = &sysctl_memory_failure_recovery, | |
1680 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1681 | .mode = 0644, | |
6d456111 | 1682 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1683 | .extra1 = &zero, |
1684 | .extra2 = &one, | |
1685 | }, | |
1686 | #endif | |
c9b1d098 AS |
1687 | { |
1688 | .procname = "user_reserve_kbytes", | |
1689 | .data = &sysctl_user_reserve_kbytes, | |
1690 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1691 | .mode = 0644, | |
1692 | .proc_handler = proc_doulongvec_minmax, | |
1693 | }, | |
4eeab4f5 AS |
1694 | { |
1695 | .procname = "admin_reserve_kbytes", | |
1696 | .data = &sysctl_admin_reserve_kbytes, | |
1697 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1698 | .mode = 0644, | |
1699 | .proc_handler = proc_doulongvec_minmax, | |
1700 | }, | |
d07e2259 DC |
1701 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1702 | { | |
1703 | .procname = "mmap_rnd_bits", | |
1704 | .data = &mmap_rnd_bits, | |
1705 | .maxlen = sizeof(mmap_rnd_bits), | |
1706 | .mode = 0600, | |
1707 | .proc_handler = proc_dointvec_minmax, | |
1708 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1709 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1710 | }, | |
1711 | #endif | |
1712 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1713 | { | |
1714 | .procname = "mmap_rnd_compat_bits", | |
1715 | .data = &mmap_rnd_compat_bits, | |
1716 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1717 | .mode = 0600, | |
1718 | .proc_handler = proc_dointvec_minmax, | |
1719 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1720 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1721 | }, | |
1722 | #endif | |
6fce56ec | 1723 | { } |
1da177e4 LT |
1724 | }; |
1725 | ||
d8217f07 | 1726 | static struct ctl_table fs_table[] = { |
1da177e4 | 1727 | { |
1da177e4 LT |
1728 | .procname = "inode-nr", |
1729 | .data = &inodes_stat, | |
3942c07c | 1730 | .maxlen = 2*sizeof(long), |
1da177e4 | 1731 | .mode = 0444, |
cffbc8aa | 1732 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1733 | }, |
1734 | { | |
1da177e4 LT |
1735 | .procname = "inode-state", |
1736 | .data = &inodes_stat, | |
3942c07c | 1737 | .maxlen = 7*sizeof(long), |
1da177e4 | 1738 | .mode = 0444, |
cffbc8aa | 1739 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1740 | }, |
1741 | { | |
1da177e4 LT |
1742 | .procname = "file-nr", |
1743 | .data = &files_stat, | |
518de9b3 | 1744 | .maxlen = sizeof(files_stat), |
1da177e4 | 1745 | .mode = 0444, |
6d456111 | 1746 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1747 | }, |
1748 | { | |
1da177e4 LT |
1749 | .procname = "file-max", |
1750 | .data = &files_stat.max_files, | |
518de9b3 | 1751 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1752 | .mode = 0644, |
518de9b3 | 1753 | .proc_handler = proc_doulongvec_minmax, |
9002b214 | 1754 | .extra1 = &zero_ul, |
32a5ad9c | 1755 | .extra2 = &long_max, |
1da177e4 | 1756 | }, |
9cfe015a | 1757 | { |
9cfe015a ED |
1758 | .procname = "nr_open", |
1759 | .data = &sysctl_nr_open, | |
9b80a184 | 1760 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1761 | .mode = 0644, |
6d456111 | 1762 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1763 | .extra1 = &sysctl_nr_open_min, |
1764 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1765 | }, |
1da177e4 | 1766 | { |
1da177e4 LT |
1767 | .procname = "dentry-state", |
1768 | .data = &dentry_stat, | |
3942c07c | 1769 | .maxlen = 6*sizeof(long), |
1da177e4 | 1770 | .mode = 0444, |
312d3ca8 | 1771 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1772 | }, |
1773 | { | |
1da177e4 LT |
1774 | .procname = "overflowuid", |
1775 | .data = &fs_overflowuid, | |
1776 | .maxlen = sizeof(int), | |
1777 | .mode = 0644, | |
6d456111 | 1778 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1779 | .extra1 = &minolduid, |
1780 | .extra2 = &maxolduid, | |
1781 | }, | |
1782 | { | |
1da177e4 LT |
1783 | .procname = "overflowgid", |
1784 | .data = &fs_overflowgid, | |
1785 | .maxlen = sizeof(int), | |
1786 | .mode = 0644, | |
6d456111 | 1787 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1788 | .extra1 = &minolduid, |
1789 | .extra2 = &maxolduid, | |
1790 | }, | |
bfcd17a6 | 1791 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1792 | { |
1da177e4 LT |
1793 | .procname = "leases-enable", |
1794 | .data = &leases_enable, | |
1795 | .maxlen = sizeof(int), | |
1796 | .mode = 0644, | |
6d456111 | 1797 | .proc_handler = proc_dointvec, |
1da177e4 | 1798 | }, |
bfcd17a6 | 1799 | #endif |
1da177e4 LT |
1800 | #ifdef CONFIG_DNOTIFY |
1801 | { | |
1da177e4 LT |
1802 | .procname = "dir-notify-enable", |
1803 | .data = &dir_notify_enable, | |
1804 | .maxlen = sizeof(int), | |
1805 | .mode = 0644, | |
6d456111 | 1806 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1807 | }, |
1808 | #endif | |
1809 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1810 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1811 | { |
1da177e4 LT |
1812 | .procname = "lease-break-time", |
1813 | .data = &lease_break_time, | |
1814 | .maxlen = sizeof(int), | |
1815 | .mode = 0644, | |
6d456111 | 1816 | .proc_handler = proc_dointvec, |
1da177e4 | 1817 | }, |
bfcd17a6 | 1818 | #endif |
ebf3f09c | 1819 | #ifdef CONFIG_AIO |
1da177e4 | 1820 | { |
1da177e4 LT |
1821 | .procname = "aio-nr", |
1822 | .data = &aio_nr, | |
1823 | .maxlen = sizeof(aio_nr), | |
1824 | .mode = 0444, | |
6d456111 | 1825 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1826 | }, |
1827 | { | |
1da177e4 LT |
1828 | .procname = "aio-max-nr", |
1829 | .data = &aio_max_nr, | |
1830 | .maxlen = sizeof(aio_max_nr), | |
1831 | .mode = 0644, | |
6d456111 | 1832 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1833 | }, |
ebf3f09c | 1834 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1835 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1836 | { |
0399cb08 RL |
1837 | .procname = "inotify", |
1838 | .mode = 0555, | |
1839 | .child = inotify_table, | |
1840 | }, | |
1841 | #endif | |
7ef9964e DL |
1842 | #ifdef CONFIG_EPOLL |
1843 | { | |
1844 | .procname = "epoll", | |
1845 | .mode = 0555, | |
1846 | .child = epoll_table, | |
1847 | }, | |
1848 | #endif | |
1da177e4 | 1849 | #endif |
800179c9 KC |
1850 | { |
1851 | .procname = "protected_symlinks", | |
1852 | .data = &sysctl_protected_symlinks, | |
1853 | .maxlen = sizeof(int), | |
1854 | .mode = 0600, | |
1855 | .proc_handler = proc_dointvec_minmax, | |
1856 | .extra1 = &zero, | |
1857 | .extra2 = &one, | |
1858 | }, | |
1859 | { | |
1860 | .procname = "protected_hardlinks", | |
1861 | .data = &sysctl_protected_hardlinks, | |
1862 | .maxlen = sizeof(int), | |
1863 | .mode = 0600, | |
1864 | .proc_handler = proc_dointvec_minmax, | |
1865 | .extra1 = &zero, | |
1866 | .extra2 = &one, | |
1867 | }, | |
30aba665 SM |
1868 | { |
1869 | .procname = "protected_fifos", | |
1870 | .data = &sysctl_protected_fifos, | |
1871 | .maxlen = sizeof(int), | |
1872 | .mode = 0600, | |
1873 | .proc_handler = proc_dointvec_minmax, | |
1874 | .extra1 = &zero, | |
1875 | .extra2 = &two, | |
1876 | }, | |
1877 | { | |
1878 | .procname = "protected_regular", | |
1879 | .data = &sysctl_protected_regular, | |
1880 | .maxlen = sizeof(int), | |
1881 | .mode = 0600, | |
1882 | .proc_handler = proc_dointvec_minmax, | |
1883 | .extra1 = &zero, | |
1884 | .extra2 = &two, | |
1885 | }, | |
d6e71144 | 1886 | { |
d6e71144 AC |
1887 | .procname = "suid_dumpable", |
1888 | .data = &suid_dumpable, | |
1889 | .maxlen = sizeof(int), | |
1890 | .mode = 0644, | |
54b50199 | 1891 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1892 | .extra1 = &zero, |
1893 | .extra2 = &two, | |
d6e71144 | 1894 | }, |
2abc26fc EB |
1895 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1896 | { | |
2abc26fc EB |
1897 | .procname = "binfmt_misc", |
1898 | .mode = 0555, | |
f9bd6733 | 1899 | .child = sysctl_mount_point, |
2abc26fc EB |
1900 | }, |
1901 | #endif | |
b492e95b | 1902 | { |
ff9da691 JA |
1903 | .procname = "pipe-max-size", |
1904 | .data = &pipe_max_size, | |
98159d97 | 1905 | .maxlen = sizeof(pipe_max_size), |
b492e95b | 1906 | .mode = 0644, |
319e0a21 | 1907 | .proc_handler = proc_dopipe_max_size, |
b492e95b | 1908 | }, |
759c0114 WT |
1909 | { |
1910 | .procname = "pipe-user-pages-hard", | |
1911 | .data = &pipe_user_pages_hard, | |
1912 | .maxlen = sizeof(pipe_user_pages_hard), | |
1913 | .mode = 0644, | |
1914 | .proc_handler = proc_doulongvec_minmax, | |
1915 | }, | |
1916 | { | |
1917 | .procname = "pipe-user-pages-soft", | |
1918 | .data = &pipe_user_pages_soft, | |
1919 | .maxlen = sizeof(pipe_user_pages_soft), | |
1920 | .mode = 0644, | |
1921 | .proc_handler = proc_doulongvec_minmax, | |
1922 | }, | |
d2921684 EB |
1923 | { |
1924 | .procname = "mount-max", | |
1925 | .data = &sysctl_mount_max, | |
1926 | .maxlen = sizeof(unsigned int), | |
1927 | .mode = 0644, | |
1928 | .proc_handler = proc_dointvec_minmax, | |
1929 | .extra1 = &one, | |
1930 | }, | |
6fce56ec | 1931 | { } |
1da177e4 LT |
1932 | }; |
1933 | ||
d8217f07 | 1934 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1935 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1936 | { |
abd4f750 MAS |
1937 | .procname = "exception-trace", |
1938 | .data = &show_unhandled_signals, | |
1939 | .maxlen = sizeof(int), | |
1940 | .mode = 0644, | |
1941 | .proc_handler = proc_dointvec | |
1942 | }, | |
b2be84df MH |
1943 | #endif |
1944 | #if defined(CONFIG_OPTPROBES) | |
1945 | { | |
1946 | .procname = "kprobes-optimization", | |
1947 | .data = &sysctl_kprobes_optimization, | |
1948 | .maxlen = sizeof(int), | |
1949 | .mode = 0644, | |
1950 | .proc_handler = proc_kprobes_optimization_handler, | |
1951 | .extra1 = &zero, | |
1952 | .extra2 = &one, | |
1953 | }, | |
abd4f750 | 1954 | #endif |
6fce56ec | 1955 | { } |
1da177e4 LT |
1956 | }; |
1957 | ||
d8217f07 | 1958 | static struct ctl_table dev_table[] = { |
6fce56ec | 1959 | { } |
0eeca283 | 1960 | }; |
1da177e4 | 1961 | |
de4e83bd | 1962 | int __init sysctl_init(void) |
d912b0cc | 1963 | { |
fd4b616b SR |
1964 | struct ctl_table_header *hdr; |
1965 | ||
1966 | hdr = register_sysctl_table(sysctl_base_table); | |
1967 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1968 | return 0; |
1969 | } | |
1970 | ||
b89a8171 EB |
1971 | #endif /* CONFIG_SYSCTL */ |
1972 | ||
1da177e4 LT |
1973 | /* |
1974 | * /proc/sys support | |
1975 | */ | |
1976 | ||
b89a8171 | 1977 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1978 | |
f8808300 KC |
1979 | static int _proc_do_string(char *data, int maxlen, int write, |
1980 | char __user *buffer, | |
b1ba4ddd | 1981 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1982 | { |
1983 | size_t len; | |
1984 | char __user *p; | |
1985 | char c; | |
8d060877 ON |
1986 | |
1987 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1988 | *lenp = 0; |
1989 | return 0; | |
1990 | } | |
8d060877 | 1991 | |
1da177e4 | 1992 | if (write) { |
f4aacea2 KC |
1993 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1994 | /* Only continue writes not past the end of buffer. */ | |
1995 | len = strlen(data); | |
1996 | if (len > maxlen - 1) | |
1997 | len = maxlen - 1; | |
1998 | ||
1999 | if (*ppos > len) | |
2000 | return 0; | |
2001 | len = *ppos; | |
2002 | } else { | |
2003 | /* Start writing from beginning of buffer. */ | |
2004 | len = 0; | |
2005 | } | |
2006 | ||
2ca9bb45 | 2007 | *ppos += *lenp; |
1da177e4 | 2008 | p = buffer; |
2ca9bb45 | 2009 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
2010 | if (get_user(c, p++)) |
2011 | return -EFAULT; | |
2012 | if (c == 0 || c == '\n') | |
2013 | break; | |
2ca9bb45 | 2014 | data[len++] = c; |
1da177e4 | 2015 | } |
f8808300 | 2016 | data[len] = 0; |
1da177e4 | 2017 | } else { |
f5dd3d6f SV |
2018 | len = strlen(data); |
2019 | if (len > maxlen) | |
2020 | len = maxlen; | |
8d060877 ON |
2021 | |
2022 | if (*ppos > len) { | |
2023 | *lenp = 0; | |
2024 | return 0; | |
2025 | } | |
2026 | ||
2027 | data += *ppos; | |
2028 | len -= *ppos; | |
2029 | ||
1da177e4 LT |
2030 | if (len > *lenp) |
2031 | len = *lenp; | |
2032 | if (len) | |
f8808300 | 2033 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
2034 | return -EFAULT; |
2035 | if (len < *lenp) { | |
f8808300 | 2036 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
2037 | return -EFAULT; |
2038 | len++; | |
2039 | } | |
2040 | *lenp = len; | |
2041 | *ppos += len; | |
2042 | } | |
2043 | return 0; | |
2044 | } | |
2045 | ||
f4aacea2 KC |
2046 | static void warn_sysctl_write(struct ctl_table *table) |
2047 | { | |
2048 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
2049 | "This will not be supported in the future. To silence this\n" | |
2050 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
2051 | current->comm, table->procname); | |
2052 | } | |
2053 | ||
d383d484 | 2054 | /** |
5f733e8a | 2055 | * proc_first_pos_non_zero_ignore - check if first position is allowed |
d383d484 LR |
2056 | * @ppos: file position |
2057 | * @table: the sysctl table | |
2058 | * | |
2059 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
2060 | * mode indicates this is not allowed for numeric input types. String proc | |
5f733e8a | 2061 | * handlers can ignore the return value. |
d383d484 LR |
2062 | */ |
2063 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
2064 | struct ctl_table *table) | |
2065 | { | |
2066 | if (!*ppos) | |
2067 | return false; | |
2068 | ||
2069 | switch (sysctl_writes_strict) { | |
2070 | case SYSCTL_WRITES_STRICT: | |
2071 | return true; | |
2072 | case SYSCTL_WRITES_WARN: | |
2073 | warn_sysctl_write(table); | |
2074 | return false; | |
2075 | default: | |
2076 | return false; | |
2077 | } | |
2078 | } | |
2079 | ||
f5dd3d6f SV |
2080 | /** |
2081 | * proc_dostring - read a string sysctl | |
2082 | * @table: the sysctl table | |
2083 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
2084 | * @buffer: the user buffer |
2085 | * @lenp: the size of the user buffer | |
2086 | * @ppos: file position | |
2087 | * | |
2088 | * Reads/writes a string from/to the user buffer. If the kernel | |
2089 | * buffer provided is not large enough to hold the string, the | |
2090 | * string is truncated. The copied string is %NULL-terminated. | |
2091 | * If the string is being read by the user process, it is copied | |
2092 | * and a newline '\n' is added. It is truncated if the buffer is | |
2093 | * not large enough. | |
2094 | * | |
2095 | * Returns 0 on success. | |
2096 | */ | |
8d65af78 | 2097 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2098 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2099 | { | |
d383d484 LR |
2100 | if (write) |
2101 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 2102 | |
f8808300 KC |
2103 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
2104 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
2105 | } |
2106 | ||
00b7c339 AW |
2107 | static size_t proc_skip_spaces(char **buf) |
2108 | { | |
2109 | size_t ret; | |
2110 | char *tmp = skip_spaces(*buf); | |
2111 | ret = tmp - *buf; | |
2112 | *buf = tmp; | |
2113 | return ret; | |
2114 | } | |
2115 | ||
9f977fb7 OP |
2116 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2117 | { | |
2118 | while (*size) { | |
2119 | if (**buf != v) | |
2120 | break; | |
2121 | (*size)--; | |
2122 | (*buf)++; | |
2123 | } | |
2124 | } | |
2125 | ||
7f2923c4 CB |
2126 | /** |
2127 | * strtoul_lenient - parse an ASCII formatted integer from a buffer and only | |
2128 | * fail on overflow | |
2129 | * | |
2130 | * @cp: kernel buffer containing the string to parse | |
2131 | * @endp: pointer to store the trailing characters | |
2132 | * @base: the base to use | |
2133 | * @res: where the parsed integer will be stored | |
2134 | * | |
2135 | * In case of success 0 is returned and @res will contain the parsed integer, | |
2136 | * @endp will hold any trailing characters. | |
2137 | * This function will fail the parse on overflow. If there wasn't an overflow | |
2138 | * the function will defer the decision what characters count as invalid to the | |
2139 | * caller. | |
2140 | */ | |
2141 | static int strtoul_lenient(const char *cp, char **endp, unsigned int base, | |
2142 | unsigned long *res) | |
2143 | { | |
2144 | unsigned long long result; | |
2145 | unsigned int rv; | |
2146 | ||
2147 | cp = _parse_integer_fixup_radix(cp, &base); | |
2148 | rv = _parse_integer(cp, base, &result); | |
2149 | if ((rv & KSTRTOX_OVERFLOW) || (result != (unsigned long)result)) | |
2150 | return -ERANGE; | |
2151 | ||
2152 | cp += rv; | |
2153 | ||
2154 | if (endp) | |
2155 | *endp = (char *)cp; | |
2156 | ||
2157 | *res = (unsigned long)result; | |
2158 | return 0; | |
2159 | } | |
2160 | ||
00b7c339 AW |
2161 | #define TMPBUFLEN 22 |
2162 | /** | |
0fc377bd | 2163 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2164 | * |
0fc377bd RD |
2165 | * @buf: a kernel buffer |
2166 | * @size: size of the kernel buffer | |
2167 | * @val: this is where the number will be stored | |
2168 | * @neg: set to %TRUE if number is negative | |
2169 | * @perm_tr: a vector which contains the allowed trailers | |
2170 | * @perm_tr_len: size of the perm_tr vector | |
2171 | * @tr: pointer to store the trailer character | |
00b7c339 | 2172 | * |
0fc377bd RD |
2173 | * In case of success %0 is returned and @buf and @size are updated with |
2174 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2175 | * character exists (size is non-zero after returning from this | |
2176 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2177 | */ |
2178 | static int proc_get_long(char **buf, size_t *size, | |
2179 | unsigned long *val, bool *neg, | |
2180 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2181 | { | |
2182 | int len; | |
2183 | char *p, tmp[TMPBUFLEN]; | |
2184 | ||
2185 | if (!*size) | |
2186 | return -EINVAL; | |
2187 | ||
2188 | len = *size; | |
2189 | if (len > TMPBUFLEN - 1) | |
2190 | len = TMPBUFLEN - 1; | |
2191 | ||
2192 | memcpy(tmp, *buf, len); | |
2193 | ||
2194 | tmp[len] = 0; | |
2195 | p = tmp; | |
2196 | if (*p == '-' && *size > 1) { | |
2197 | *neg = true; | |
2198 | p++; | |
2199 | } else | |
2200 | *neg = false; | |
2201 | if (!isdigit(*p)) | |
2202 | return -EINVAL; | |
2203 | ||
7f2923c4 CB |
2204 | if (strtoul_lenient(p, &p, 0, val)) |
2205 | return -EINVAL; | |
00b7c339 AW |
2206 | |
2207 | len = p - tmp; | |
2208 | ||
2209 | /* We don't know if the next char is whitespace thus we may accept | |
2210 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2211 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2212 | if (len == TMPBUFLEN - 1) | |
2213 | return -EINVAL; | |
2214 | ||
2215 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2216 | return -EINVAL; | |
1da177e4 | 2217 | |
00b7c339 AW |
2218 | if (tr && (len < *size)) |
2219 | *tr = *p; | |
2220 | ||
2221 | *buf += len; | |
2222 | *size -= len; | |
2223 | ||
2224 | return 0; | |
2225 | } | |
2226 | ||
2227 | /** | |
0fc377bd | 2228 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2229 | * |
0fc377bd RD |
2230 | * @buf: the user buffer |
2231 | * @size: the size of the user buffer | |
2232 | * @val: the integer to be converted | |
2233 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2234 | * |
0fc377bd RD |
2235 | * In case of success %0 is returned and @buf and @size are updated with |
2236 | * the amount of bytes written. | |
00b7c339 AW |
2237 | */ |
2238 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2239 | bool neg) | |
2240 | { | |
2241 | int len; | |
2242 | char tmp[TMPBUFLEN], *p = tmp; | |
2243 | ||
2244 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2245 | len = strlen(tmp); | |
2246 | if (len > *size) | |
2247 | len = *size; | |
2248 | if (copy_to_user(*buf, tmp, len)) | |
2249 | return -EFAULT; | |
2250 | *size -= len; | |
2251 | *buf += len; | |
2252 | return 0; | |
2253 | } | |
2254 | #undef TMPBUFLEN | |
2255 | ||
2256 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2257 | { | |
2258 | if (*size) { | |
2259 | char __user **buffer = (char __user **)buf; | |
2260 | if (put_user(c, *buffer)) | |
2261 | return -EFAULT; | |
2262 | (*size)--, (*buffer)++; | |
2263 | *buf = *buffer; | |
2264 | } | |
2265 | return 0; | |
2266 | } | |
1da177e4 | 2267 | |
00b7c339 | 2268 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2269 | int *valp, |
2270 | int write, void *data) | |
2271 | { | |
2272 | if (write) { | |
230633d1 HS |
2273 | if (*negp) { |
2274 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2275 | return -EINVAL; | |
2276 | *valp = -*lvalp; | |
2277 | } else { | |
2278 | if (*lvalp > (unsigned long) INT_MAX) | |
2279 | return -EINVAL; | |
2280 | *valp = *lvalp; | |
2281 | } | |
1da177e4 LT |
2282 | } else { |
2283 | int val = *valp; | |
2284 | if (val < 0) { | |
00b7c339 | 2285 | *negp = true; |
9a5bc726 | 2286 | *lvalp = -(unsigned long)val; |
1da177e4 | 2287 | } else { |
00b7c339 | 2288 | *negp = false; |
1da177e4 LT |
2289 | *lvalp = (unsigned long)val; |
2290 | } | |
2291 | } | |
2292 | return 0; | |
2293 | } | |
2294 | ||
4f2fec00 LR |
2295 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
2296 | unsigned int *valp, | |
2297 | int write, void *data) | |
e7d316a0 SAK |
2298 | { |
2299 | if (write) { | |
425fffd8 LZ |
2300 | if (*lvalp > UINT_MAX) |
2301 | return -EINVAL; | |
e7d316a0 SAK |
2302 | *valp = *lvalp; |
2303 | } else { | |
2304 | unsigned int val = *valp; | |
2305 | *lvalp = (unsigned long)val; | |
2306 | } | |
2307 | return 0; | |
2308 | } | |
2309 | ||
00b7c339 AW |
2310 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2311 | ||
d8217f07 | 2312 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2313 | int write, void __user *buffer, |
fcfbd547 | 2314 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2315 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2316 | int write, void *data), |
2317 | void *data) | |
2318 | { | |
00b7c339 | 2319 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2320 | size_t left; |
70f6cbb6 | 2321 | char *kbuf = NULL, *p; |
1da177e4 | 2322 | |
00b7c339 | 2323 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2324 | *lenp = 0; |
2325 | return 0; | |
2326 | } | |
2327 | ||
fcfbd547 | 2328 | i = (int *) tbl_data; |
1da177e4 LT |
2329 | vleft = table->maxlen / sizeof(*i); |
2330 | left = *lenp; | |
2331 | ||
2332 | if (!conv) | |
2333 | conv = do_proc_dointvec_conv; | |
2334 | ||
00b7c339 | 2335 | if (write) { |
d383d484 LR |
2336 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2337 | goto out; | |
f4aacea2 | 2338 | |
00b7c339 AW |
2339 | if (left > PAGE_SIZE - 1) |
2340 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2341 | p = kbuf = memdup_user_nul(buffer, left); |
2342 | if (IS_ERR(kbuf)) | |
2343 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2344 | } |
2345 | ||
1da177e4 | 2346 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2347 | unsigned long lval; |
2348 | bool neg; | |
1da177e4 | 2349 | |
00b7c339 | 2350 | if (write) { |
70f6cbb6 | 2351 | left -= proc_skip_spaces(&p); |
1da177e4 | 2352 | |
563b0467 O |
2353 | if (!left) |
2354 | break; | |
70f6cbb6 | 2355 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2356 | proc_wspace_sep, |
2357 | sizeof(proc_wspace_sep), NULL); | |
2358 | if (err) | |
1da177e4 | 2359 | break; |
00b7c339 AW |
2360 | if (conv(&neg, &lval, i, 1, data)) { |
2361 | err = -EINVAL; | |
1da177e4 | 2362 | break; |
00b7c339 | 2363 | } |
1da177e4 | 2364 | } else { |
00b7c339 AW |
2365 | if (conv(&neg, &lval, i, 0, data)) { |
2366 | err = -EINVAL; | |
2367 | break; | |
2368 | } | |
1da177e4 | 2369 | if (!first) |
00b7c339 AW |
2370 | err = proc_put_char(&buffer, &left, '\t'); |
2371 | if (err) | |
2372 | break; | |
2373 | err = proc_put_long(&buffer, &left, lval, neg); | |
2374 | if (err) | |
1da177e4 | 2375 | break; |
1da177e4 LT |
2376 | } |
2377 | } | |
2378 | ||
00b7c339 AW |
2379 | if (!write && !first && left && !err) |
2380 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2381 | if (write && !err && left) |
70f6cbb6 | 2382 | left -= proc_skip_spaces(&p); |
1da177e4 | 2383 | if (write) { |
70f6cbb6 | 2384 | kfree(kbuf); |
00b7c339 AW |
2385 | if (first) |
2386 | return err ? : -EINVAL; | |
1da177e4 | 2387 | } |
1da177e4 | 2388 | *lenp -= left; |
f4aacea2 | 2389 | out: |
1da177e4 | 2390 | *ppos += *lenp; |
00b7c339 | 2391 | return err; |
1da177e4 LT |
2392 | } |
2393 | ||
8d65af78 | 2394 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2395 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2396 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2397 | int write, void *data), |
2398 | void *data) | |
2399 | { | |
8d65af78 | 2400 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2401 | buffer, lenp, ppos, conv, data); |
2402 | } | |
2403 | ||
4f2fec00 LR |
2404 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
2405 | struct ctl_table *table, | |
2406 | void __user *buffer, | |
2407 | size_t *lenp, loff_t *ppos, | |
2408 | int (*conv)(unsigned long *lvalp, | |
2409 | unsigned int *valp, | |
2410 | int write, void *data), | |
2411 | void *data) | |
2412 | { | |
2413 | unsigned long lval; | |
2414 | int err = 0; | |
2415 | size_t left; | |
2416 | bool neg; | |
2417 | char *kbuf = NULL, *p; | |
2418 | ||
2419 | left = *lenp; | |
2420 | ||
2421 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
2422 | goto bail_early; | |
2423 | ||
2424 | if (left > PAGE_SIZE - 1) | |
2425 | left = PAGE_SIZE - 1; | |
2426 | ||
2427 | p = kbuf = memdup_user_nul(buffer, left); | |
2428 | if (IS_ERR(kbuf)) | |
2429 | return -EINVAL; | |
2430 | ||
2431 | left -= proc_skip_spaces(&p); | |
2432 | if (!left) { | |
2433 | err = -EINVAL; | |
2434 | goto out_free; | |
2435 | } | |
2436 | ||
2437 | err = proc_get_long(&p, &left, &lval, &neg, | |
2438 | proc_wspace_sep, | |
2439 | sizeof(proc_wspace_sep), NULL); | |
2440 | if (err || neg) { | |
2441 | err = -EINVAL; | |
2442 | goto out_free; | |
2443 | } | |
2444 | ||
2445 | if (conv(&lval, tbl_data, 1, data)) { | |
2446 | err = -EINVAL; | |
2447 | goto out_free; | |
2448 | } | |
2449 | ||
2450 | if (!err && left) | |
2451 | left -= proc_skip_spaces(&p); | |
2452 | ||
2453 | out_free: | |
2454 | kfree(kbuf); | |
2455 | if (err) | |
2456 | return -EINVAL; | |
2457 | ||
2458 | return 0; | |
2459 | ||
2460 | /* This is in keeping with old __do_proc_dointvec() */ | |
2461 | bail_early: | |
2462 | *ppos += *lenp; | |
2463 | return err; | |
2464 | } | |
2465 | ||
2466 | static int do_proc_douintvec_r(unsigned int *tbl_data, void __user *buffer, | |
2467 | size_t *lenp, loff_t *ppos, | |
2468 | int (*conv)(unsigned long *lvalp, | |
2469 | unsigned int *valp, | |
2470 | int write, void *data), | |
2471 | void *data) | |
2472 | { | |
2473 | unsigned long lval; | |
2474 | int err = 0; | |
2475 | size_t left; | |
2476 | ||
2477 | left = *lenp; | |
2478 | ||
2479 | if (conv(&lval, tbl_data, 0, data)) { | |
2480 | err = -EINVAL; | |
2481 | goto out; | |
2482 | } | |
2483 | ||
2484 | err = proc_put_long(&buffer, &left, lval, false); | |
2485 | if (err || !left) | |
2486 | goto out; | |
2487 | ||
2488 | err = proc_put_char(&buffer, &left, '\n'); | |
2489 | ||
2490 | out: | |
2491 | *lenp -= left; | |
2492 | *ppos += *lenp; | |
2493 | ||
2494 | return err; | |
2495 | } | |
2496 | ||
2497 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
2498 | int write, void __user *buffer, | |
2499 | size_t *lenp, loff_t *ppos, | |
2500 | int (*conv)(unsigned long *lvalp, | |
2501 | unsigned int *valp, | |
2502 | int write, void *data), | |
2503 | void *data) | |
2504 | { | |
2505 | unsigned int *i, vleft; | |
2506 | ||
2507 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
2508 | *lenp = 0; | |
2509 | return 0; | |
2510 | } | |
2511 | ||
2512 | i = (unsigned int *) tbl_data; | |
2513 | vleft = table->maxlen / sizeof(*i); | |
2514 | ||
2515 | /* | |
2516 | * Arrays are not supported, keep this simple. *Do not* add | |
2517 | * support for them. | |
2518 | */ | |
2519 | if (vleft != 1) { | |
2520 | *lenp = 0; | |
2521 | return -EINVAL; | |
2522 | } | |
2523 | ||
2524 | if (!conv) | |
2525 | conv = do_proc_douintvec_conv; | |
2526 | ||
2527 | if (write) | |
2528 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
2529 | conv, data); | |
2530 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
2531 | } | |
2532 | ||
2533 | static int do_proc_douintvec(struct ctl_table *table, int write, | |
2534 | void __user *buffer, size_t *lenp, loff_t *ppos, | |
2535 | int (*conv)(unsigned long *lvalp, | |
2536 | unsigned int *valp, | |
2537 | int write, void *data), | |
2538 | void *data) | |
2539 | { | |
2540 | return __do_proc_douintvec(table->data, table, write, | |
2541 | buffer, lenp, ppos, conv, data); | |
2542 | } | |
2543 | ||
1da177e4 LT |
2544 | /** |
2545 | * proc_dointvec - read a vector of integers | |
2546 | * @table: the sysctl table | |
2547 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2548 | * @buffer: the user buffer |
2549 | * @lenp: the size of the user buffer | |
2550 | * @ppos: file position | |
2551 | * | |
2552 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2553 | * values from/to the user buffer, treated as an ASCII string. | |
2554 | * | |
2555 | * Returns 0 on success. | |
2556 | */ | |
8d65af78 | 2557 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2558 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2559 | { | |
e7d316a0 SAK |
2560 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2561 | } | |
2562 | ||
2563 | /** | |
2564 | * proc_douintvec - read a vector of unsigned integers | |
2565 | * @table: the sysctl table | |
2566 | * @write: %TRUE if this is a write to the sysctl file | |
2567 | * @buffer: the user buffer | |
2568 | * @lenp: the size of the user buffer | |
2569 | * @ppos: file position | |
2570 | * | |
2571 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2572 | * values from/to the user buffer, treated as an ASCII string. | |
2573 | * | |
2574 | * Returns 0 on success. | |
2575 | */ | |
2576 | int proc_douintvec(struct ctl_table *table, int write, | |
2577 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2578 | { | |
4f2fec00 LR |
2579 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
2580 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2581 | } |
2582 | ||
34f5a398 | 2583 | /* |
25ddbb18 AK |
2584 | * Taint values can only be increased |
2585 | * This means we can safely use a temporary. | |
34f5a398 | 2586 | */ |
8d65af78 | 2587 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2588 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2589 | { | |
25ddbb18 AK |
2590 | struct ctl_table t; |
2591 | unsigned long tmptaint = get_taint(); | |
2592 | int err; | |
34f5a398 | 2593 | |
91fcd412 | 2594 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2595 | return -EPERM; |
2596 | ||
25ddbb18 AK |
2597 | t = *table; |
2598 | t.data = &tmptaint; | |
8d65af78 | 2599 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2600 | if (err < 0) |
2601 | return err; | |
2602 | ||
2603 | if (write) { | |
2604 | /* | |
2605 | * Poor man's atomic or. Not worth adding a primitive | |
2606 | * to everyone's atomic.h for this | |
2607 | */ | |
2608 | int i; | |
2609 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2610 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2611 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2612 | } |
2613 | } | |
2614 | ||
2615 | return err; | |
34f5a398 TT |
2616 | } |
2617 | ||
bfdc0b49 | 2618 | #ifdef CONFIG_PRINTK |
620f6e8e | 2619 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2620 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2621 | { | |
2622 | if (write && !capable(CAP_SYS_ADMIN)) | |
2623 | return -EPERM; | |
2624 | ||
2625 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2626 | } | |
2627 | #endif | |
2628 | ||
24704f36 WL |
2629 | /** |
2630 | * struct do_proc_dointvec_minmax_conv_param - proc_dointvec_minmax() range checking structure | |
2631 | * @min: pointer to minimum allowable value | |
2632 | * @max: pointer to maximum allowable value | |
2633 | * | |
2634 | * The do_proc_dointvec_minmax_conv_param structure provides the | |
2635 | * minimum and maximum values for doing range checking for those sysctl | |
2636 | * parameters that use the proc_dointvec_minmax() handler. | |
2637 | */ | |
1da177e4 LT |
2638 | struct do_proc_dointvec_minmax_conv_param { |
2639 | int *min; | |
2640 | int *max; | |
2641 | }; | |
2642 | ||
00b7c339 AW |
2643 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2644 | int *valp, | |
1da177e4 LT |
2645 | int write, void *data) |
2646 | { | |
2bc4fc60 | 2647 | int tmp, ret; |
1da177e4 | 2648 | struct do_proc_dointvec_minmax_conv_param *param = data; |
2bc4fc60 ZW |
2649 | /* |
2650 | * If writing, first do so via a temporary local int so we can | |
2651 | * bounds-check it before touching *valp. | |
2652 | */ | |
2653 | int *ip = write ? &tmp : valp; | |
2654 | ||
2655 | ret = do_proc_dointvec_conv(negp, lvalp, ip, write, data); | |
2656 | if (ret) | |
2657 | return ret; | |
2658 | ||
1da177e4 | 2659 | if (write) { |
2bc4fc60 ZW |
2660 | if ((param->min && *param->min > tmp) || |
2661 | (param->max && *param->max < tmp)) | |
1da177e4 | 2662 | return -EINVAL; |
2bc4fc60 | 2663 | *valp = tmp; |
1da177e4 | 2664 | } |
2bc4fc60 | 2665 | |
1da177e4 LT |
2666 | return 0; |
2667 | } | |
2668 | ||
2669 | /** | |
2670 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2671 | * @table: the sysctl table | |
2672 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2673 | * @buffer: the user buffer |
2674 | * @lenp: the size of the user buffer | |
2675 | * @ppos: file position | |
2676 | * | |
2677 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2678 | * values from/to the user buffer, treated as an ASCII string. | |
2679 | * | |
2680 | * This routine will ensure the values are within the range specified by | |
2681 | * table->extra1 (min) and table->extra2 (max). | |
2682 | * | |
24704f36 | 2683 | * Returns 0 on success or -EINVAL on write when the range check fails. |
1da177e4 | 2684 | */ |
8d65af78 | 2685 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2686 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2687 | { | |
2688 | struct do_proc_dointvec_minmax_conv_param param = { | |
2689 | .min = (int *) table->extra1, | |
2690 | .max = (int *) table->extra2, | |
2691 | }; | |
8d65af78 | 2692 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2693 | do_proc_dointvec_minmax_conv, ¶m); |
2694 | } | |
2695 | ||
24704f36 WL |
2696 | /** |
2697 | * struct do_proc_douintvec_minmax_conv_param - proc_douintvec_minmax() range checking structure | |
2698 | * @min: pointer to minimum allowable value | |
2699 | * @max: pointer to maximum allowable value | |
2700 | * | |
2701 | * The do_proc_douintvec_minmax_conv_param structure provides the | |
2702 | * minimum and maximum values for doing range checking for those sysctl | |
2703 | * parameters that use the proc_douintvec_minmax() handler. | |
2704 | */ | |
61d9b56a LR |
2705 | struct do_proc_douintvec_minmax_conv_param { |
2706 | unsigned int *min; | |
2707 | unsigned int *max; | |
2708 | }; | |
2709 | ||
2710 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
2711 | unsigned int *valp, | |
2712 | int write, void *data) | |
2713 | { | |
2bc4fc60 ZW |
2714 | int ret; |
2715 | unsigned int tmp; | |
61d9b56a | 2716 | struct do_proc_douintvec_minmax_conv_param *param = data; |
2bc4fc60 ZW |
2717 | /* write via temporary local uint for bounds-checking */ |
2718 | unsigned int *up = write ? &tmp : valp; | |
61d9b56a | 2719 | |
2bc4fc60 ZW |
2720 | ret = do_proc_douintvec_conv(lvalp, up, write, data); |
2721 | if (ret) | |
2722 | return ret; | |
fb910c42 | 2723 | |
2bc4fc60 ZW |
2724 | if (write) { |
2725 | if ((param->min && *param->min > tmp) || | |
2726 | (param->max && *param->max < tmp)) | |
61d9b56a LR |
2727 | return -ERANGE; |
2728 | ||
2bc4fc60 | 2729 | *valp = tmp; |
61d9b56a LR |
2730 | } |
2731 | ||
2732 | return 0; | |
2733 | } | |
2734 | ||
2735 | /** | |
2736 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
2737 | * @table: the sysctl table | |
2738 | * @write: %TRUE if this is a write to the sysctl file | |
2739 | * @buffer: the user buffer | |
2740 | * @lenp: the size of the user buffer | |
2741 | * @ppos: file position | |
2742 | * | |
2743 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2744 | * values from/to the user buffer, treated as an ASCII string. Negative | |
2745 | * strings are not allowed. | |
2746 | * | |
2747 | * This routine will ensure the values are within the range specified by | |
2748 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
2749 | * check for UINT_MAX to avoid having to support wrap around uses from | |
2750 | * userspace. | |
2751 | * | |
24704f36 | 2752 | * Returns 0 on success or -ERANGE on write when the range check fails. |
61d9b56a LR |
2753 | */ |
2754 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
2755 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2756 | { | |
2757 | struct do_proc_douintvec_minmax_conv_param param = { | |
2758 | .min = (unsigned int *) table->extra1, | |
2759 | .max = (unsigned int *) table->extra2, | |
2760 | }; | |
2761 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
2762 | do_proc_douintvec_minmax_conv, ¶m); | |
2763 | } | |
2764 | ||
7a8d1819 JL |
2765 | static int do_proc_dopipe_max_size_conv(unsigned long *lvalp, |
2766 | unsigned int *valp, | |
2767 | int write, void *data) | |
2768 | { | |
7a8d1819 | 2769 | if (write) { |
fb910c42 | 2770 | unsigned int val; |
7a8d1819 | 2771 | |
fb910c42 | 2772 | val = round_pipe_size(*lvalp); |
7a8d1819 JL |
2773 | if (val == 0) |
2774 | return -EINVAL; | |
2775 | ||
7a8d1819 JL |
2776 | *valp = val; |
2777 | } else { | |
2778 | unsigned int val = *valp; | |
2779 | *lvalp = (unsigned long) val; | |
2780 | } | |
2781 | ||
2782 | return 0; | |
2783 | } | |
2784 | ||
319e0a21 EB |
2785 | static int proc_dopipe_max_size(struct ctl_table *table, int write, |
2786 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
7a8d1819 | 2787 | { |
7a8d1819 | 2788 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
4c2e4bef | 2789 | do_proc_dopipe_max_size_conv, NULL); |
7a8d1819 JL |
2790 | } |
2791 | ||
54b50199 KC |
2792 | static void validate_coredump_safety(void) |
2793 | { | |
046d662f | 2794 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2795 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2796 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2797 | printk(KERN_WARNING |
2798 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2799 | "Pipe handler or fully qualified core dump path required.\n" | |
2800 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2801 | ); | |
54b50199 | 2802 | } |
046d662f | 2803 | #endif |
54b50199 KC |
2804 | } |
2805 | ||
2806 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2807 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2808 | { | |
2809 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2810 | if (!error) | |
2811 | validate_coredump_safety(); | |
2812 | return error; | |
2813 | } | |
2814 | ||
046d662f | 2815 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2816 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2817 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2818 | { | |
2819 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2820 | if (!error) | |
2821 | validate_coredump_safety(); | |
2822 | return error; | |
2823 | } | |
046d662f | 2824 | #endif |
54b50199 | 2825 | |
d8217f07 | 2826 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2827 | void __user *buffer, |
2828 | size_t *lenp, loff_t *ppos, | |
2829 | unsigned long convmul, | |
2830 | unsigned long convdiv) | |
2831 | { | |
00b7c339 AW |
2832 | unsigned long *i, *min, *max; |
2833 | int vleft, first = 1, err = 0; | |
00b7c339 | 2834 | size_t left; |
70f6cbb6 | 2835 | char *kbuf = NULL, *p; |
00b7c339 AW |
2836 | |
2837 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2838 | *lenp = 0; |
2839 | return 0; | |
2840 | } | |
00b7c339 | 2841 | |
fcfbd547 | 2842 | i = (unsigned long *) data; |
1da177e4 LT |
2843 | min = (unsigned long *) table->extra1; |
2844 | max = (unsigned long *) table->extra2; | |
2845 | vleft = table->maxlen / sizeof(unsigned long); | |
2846 | left = *lenp; | |
00b7c339 AW |
2847 | |
2848 | if (write) { | |
d383d484 LR |
2849 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2850 | goto out; | |
f4aacea2 | 2851 | |
00b7c339 AW |
2852 | if (left > PAGE_SIZE - 1) |
2853 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2854 | p = kbuf = memdup_user_nul(buffer, left); |
2855 | if (IS_ERR(kbuf)) | |
2856 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2857 | } |
2858 | ||
27b3d80a | 2859 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2860 | unsigned long val; |
2861 | ||
1da177e4 | 2862 | if (write) { |
00b7c339 AW |
2863 | bool neg; |
2864 | ||
70f6cbb6 | 2865 | left -= proc_skip_spaces(&p); |
09be1784 CL |
2866 | if (!left) |
2867 | break; | |
00b7c339 | 2868 | |
70f6cbb6 | 2869 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2870 | proc_wspace_sep, |
2871 | sizeof(proc_wspace_sep), NULL); | |
2872 | if (err) | |
1da177e4 LT |
2873 | break; |
2874 | if (neg) | |
1da177e4 | 2875 | continue; |
ff9f8a7c | 2876 | val = convmul * val / convdiv; |
1da177e4 LT |
2877 | if ((min && val < *min) || (max && val > *max)) |
2878 | continue; | |
2879 | *i = val; | |
2880 | } else { | |
00b7c339 | 2881 | val = convdiv * (*i) / convmul; |
7833819d | 2882 | if (!first) { |
00b7c339 | 2883 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2884 | if (err) |
2885 | break; | |
2886 | } | |
00b7c339 AW |
2887 | err = proc_put_long(&buffer, &left, val, false); |
2888 | if (err) | |
2889 | break; | |
1da177e4 LT |
2890 | } |
2891 | } | |
2892 | ||
00b7c339 AW |
2893 | if (!write && !first && left && !err) |
2894 | err = proc_put_char(&buffer, &left, '\n'); | |
2895 | if (write && !err) | |
70f6cbb6 | 2896 | left -= proc_skip_spaces(&p); |
1da177e4 | 2897 | if (write) { |
70f6cbb6 | 2898 | kfree(kbuf); |
00b7c339 AW |
2899 | if (first) |
2900 | return err ? : -EINVAL; | |
1da177e4 | 2901 | } |
1da177e4 | 2902 | *lenp -= left; |
f4aacea2 | 2903 | out: |
1da177e4 | 2904 | *ppos += *lenp; |
00b7c339 | 2905 | return err; |
1da177e4 LT |
2906 | } |
2907 | ||
d8217f07 | 2908 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2909 | void __user *buffer, |
2910 | size_t *lenp, loff_t *ppos, | |
2911 | unsigned long convmul, | |
2912 | unsigned long convdiv) | |
2913 | { | |
2914 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2915 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2916 | } |
2917 | ||
1da177e4 LT |
2918 | /** |
2919 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2920 | * @table: the sysctl table | |
2921 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2922 | * @buffer: the user buffer |
2923 | * @lenp: the size of the user buffer | |
2924 | * @ppos: file position | |
2925 | * | |
2926 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2927 | * values from/to the user buffer, treated as an ASCII string. | |
2928 | * | |
2929 | * This routine will ensure the values are within the range specified by | |
2930 | * table->extra1 (min) and table->extra2 (max). | |
2931 | * | |
2932 | * Returns 0 on success. | |
2933 | */ | |
8d65af78 | 2934 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2935 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2936 | { | |
8d65af78 | 2937 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2938 | } |
2939 | ||
2940 | /** | |
2941 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2942 | * @table: the sysctl table | |
2943 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2944 | * @buffer: the user buffer |
2945 | * @lenp: the size of the user buffer | |
2946 | * @ppos: file position | |
2947 | * | |
2948 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2949 | * values from/to the user buffer, treated as an ASCII string. The values | |
2950 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2951 | * | |
2952 | * This routine will ensure the values are within the range specified by | |
2953 | * table->extra1 (min) and table->extra2 (max). | |
2954 | * | |
2955 | * Returns 0 on success. | |
2956 | */ | |
d8217f07 | 2957 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2958 | void __user *buffer, |
2959 | size_t *lenp, loff_t *ppos) | |
2960 | { | |
8d65af78 | 2961 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2962 | lenp, ppos, HZ, 1000l); |
2963 | } | |
2964 | ||
2965 | ||
00b7c339 | 2966 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2967 | int *valp, |
2968 | int write, void *data) | |
2969 | { | |
2970 | if (write) { | |
63259457 | 2971 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 2972 | return 1; |
1da177e4 LT |
2973 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2974 | } else { | |
2975 | int val = *valp; | |
2976 | unsigned long lval; | |
2977 | if (val < 0) { | |
00b7c339 | 2978 | *negp = true; |
9a5bc726 | 2979 | lval = -(unsigned long)val; |
1da177e4 | 2980 | } else { |
00b7c339 | 2981 | *negp = false; |
1da177e4 LT |
2982 | lval = (unsigned long)val; |
2983 | } | |
2984 | *lvalp = lval / HZ; | |
2985 | } | |
2986 | return 0; | |
2987 | } | |
2988 | ||
00b7c339 | 2989 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2990 | int *valp, |
2991 | int write, void *data) | |
2992 | { | |
2993 | if (write) { | |
cba9f33d BS |
2994 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2995 | return 1; | |
1da177e4 LT |
2996 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2997 | } else { | |
2998 | int val = *valp; | |
2999 | unsigned long lval; | |
3000 | if (val < 0) { | |
00b7c339 | 3001 | *negp = true; |
9a5bc726 | 3002 | lval = -(unsigned long)val; |
1da177e4 | 3003 | } else { |
00b7c339 | 3004 | *negp = false; |
1da177e4 LT |
3005 | lval = (unsigned long)val; |
3006 | } | |
3007 | *lvalp = jiffies_to_clock_t(lval); | |
3008 | } | |
3009 | return 0; | |
3010 | } | |
3011 | ||
00b7c339 | 3012 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
3013 | int *valp, |
3014 | int write, void *data) | |
3015 | { | |
3016 | if (write) { | |
d738ce8f FF |
3017 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
3018 | ||
3019 | if (jif > INT_MAX) | |
3020 | return 1; | |
3021 | *valp = (int)jif; | |
1da177e4 LT |
3022 | } else { |
3023 | int val = *valp; | |
3024 | unsigned long lval; | |
3025 | if (val < 0) { | |
00b7c339 | 3026 | *negp = true; |
9a5bc726 | 3027 | lval = -(unsigned long)val; |
1da177e4 | 3028 | } else { |
00b7c339 | 3029 | *negp = false; |
1da177e4 LT |
3030 | lval = (unsigned long)val; |
3031 | } | |
3032 | *lvalp = jiffies_to_msecs(lval); | |
3033 | } | |
3034 | return 0; | |
3035 | } | |
3036 | ||
3037 | /** | |
3038 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
3039 | * @table: the sysctl table | |
3040 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3041 | * @buffer: the user buffer |
3042 | * @lenp: the size of the user buffer | |
3043 | * @ppos: file position | |
3044 | * | |
3045 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3046 | * values from/to the user buffer, treated as an ASCII string. | |
3047 | * The values read are assumed to be in seconds, and are converted into | |
3048 | * jiffies. | |
3049 | * | |
3050 | * Returns 0 on success. | |
3051 | */ | |
8d65af78 | 3052 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3053 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3054 | { | |
8d65af78 | 3055 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
3056 | do_proc_dointvec_jiffies_conv,NULL); |
3057 | } | |
3058 | ||
3059 | /** | |
3060 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
3061 | * @table: the sysctl table | |
3062 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3063 | * @buffer: the user buffer |
3064 | * @lenp: the size of the user buffer | |
1e5d5331 | 3065 | * @ppos: pointer to the file position |
1da177e4 LT |
3066 | * |
3067 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3068 | * values from/to the user buffer, treated as an ASCII string. | |
3069 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
3070 | * are converted into jiffies. | |
3071 | * | |
3072 | * Returns 0 on success. | |
3073 | */ | |
8d65af78 | 3074 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3075 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3076 | { | |
8d65af78 | 3077 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
3078 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
3079 | } | |
3080 | ||
3081 | /** | |
3082 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
3083 | * @table: the sysctl table | |
3084 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
3085 | * @buffer: the user buffer |
3086 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
3087 | * @ppos: file position |
3088 | * @ppos: the current position in the file | |
1da177e4 LT |
3089 | * |
3090 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
3091 | * values from/to the user buffer, treated as an ASCII string. | |
3092 | * The values read are assumed to be in 1/1000 seconds, and | |
3093 | * are converted into jiffies. | |
3094 | * | |
3095 | * Returns 0 on success. | |
3096 | */ | |
8d65af78 | 3097 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3098 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3099 | { | |
8d65af78 | 3100 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
3101 | do_proc_dointvec_ms_jiffies_conv, NULL); |
3102 | } | |
3103 | ||
8d65af78 | 3104 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
3105 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3106 | { | |
3107 | struct pid *new_pid; | |
3108 | pid_t tmp; | |
3109 | int r; | |
3110 | ||
6c5f3e7b | 3111 | tmp = pid_vnr(cad_pid); |
9ec52099 | 3112 | |
8d65af78 | 3113 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
3114 | lenp, ppos, NULL, NULL); |
3115 | if (r || !write) | |
3116 | return r; | |
3117 | ||
3118 | new_pid = find_get_pid(tmp); | |
3119 | if (!new_pid) | |
3120 | return -ESRCH; | |
3121 | ||
3122 | put_pid(xchg(&cad_pid, new_pid)); | |
3123 | return 0; | |
3124 | } | |
3125 | ||
9f977fb7 OP |
3126 | /** |
3127 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
3128 | * @table: the sysctl table | |
3129 | * @write: %TRUE if this is a write to the sysctl file | |
3130 | * @buffer: the user buffer | |
3131 | * @lenp: the size of the user buffer | |
3132 | * @ppos: file position | |
3133 | * | |
3134 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
3135 | * in table->maxlen. | |
3136 | * | |
3137 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
3138 | * large bitmaps may be represented in a compact manner. Writing into | |
3139 | * the file will clear the bitmap then update it with the given input. | |
3140 | * | |
3141 | * Returns 0 on success. | |
3142 | */ | |
3143 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
3144 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3145 | { | |
3146 | int err = 0; | |
3147 | bool first = 1; | |
3148 | size_t left = *lenp; | |
3149 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 3150 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
3151 | unsigned long *tmp_bitmap = NULL; |
3152 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
3153 | ||
122ff243 | 3154 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
3155 | *lenp = 0; |
3156 | return 0; | |
3157 | } | |
3158 | ||
3159 | if (write) { | |
70f6cbb6 | 3160 | char *kbuf, *p; |
9f977fb7 OP |
3161 | |
3162 | if (left > PAGE_SIZE - 1) | |
3163 | left = PAGE_SIZE - 1; | |
3164 | ||
70f6cbb6 AV |
3165 | p = kbuf = memdup_user_nul(buffer, left); |
3166 | if (IS_ERR(kbuf)) | |
3167 | return PTR_ERR(kbuf); | |
9f977fb7 | 3168 | |
6396bb22 KC |
3169 | tmp_bitmap = kcalloc(BITS_TO_LONGS(bitmap_len), |
3170 | sizeof(unsigned long), | |
9f977fb7 OP |
3171 | GFP_KERNEL); |
3172 | if (!tmp_bitmap) { | |
70f6cbb6 | 3173 | kfree(kbuf); |
9f977fb7 OP |
3174 | return -ENOMEM; |
3175 | } | |
70f6cbb6 | 3176 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
3177 | while (!err && left) { |
3178 | unsigned long val_a, val_b; | |
3179 | bool neg; | |
3180 | ||
70f6cbb6 | 3181 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
3182 | sizeof(tr_a), &c); |
3183 | if (err) | |
3184 | break; | |
3185 | if (val_a >= bitmap_len || neg) { | |
3186 | err = -EINVAL; | |
3187 | break; | |
3188 | } | |
3189 | ||
3190 | val_b = val_a; | |
3191 | if (left) { | |
70f6cbb6 | 3192 | p++; |
9f977fb7 OP |
3193 | left--; |
3194 | } | |
3195 | ||
3196 | if (c == '-') { | |
70f6cbb6 | 3197 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
3198 | &neg, tr_b, sizeof(tr_b), |
3199 | &c); | |
3200 | if (err) | |
3201 | break; | |
3202 | if (val_b >= bitmap_len || neg || | |
3203 | val_a > val_b) { | |
3204 | err = -EINVAL; | |
3205 | break; | |
3206 | } | |
3207 | if (left) { | |
70f6cbb6 | 3208 | p++; |
9f977fb7 OP |
3209 | left--; |
3210 | } | |
3211 | } | |
3212 | ||
5a04cca6 | 3213 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 3214 | first = 0; |
70f6cbb6 | 3215 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 3216 | } |
70f6cbb6 | 3217 | kfree(kbuf); |
9f977fb7 OP |
3218 | } else { |
3219 | unsigned long bit_a, bit_b = 0; | |
3220 | ||
3221 | while (left) { | |
3222 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
3223 | if (bit_a >= bitmap_len) | |
3224 | break; | |
3225 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
3226 | bit_a + 1) - 1; | |
3227 | ||
3228 | if (!first) { | |
3229 | err = proc_put_char(&buffer, &left, ','); | |
3230 | if (err) | |
3231 | break; | |
3232 | } | |
3233 | err = proc_put_long(&buffer, &left, bit_a, false); | |
3234 | if (err) | |
3235 | break; | |
3236 | if (bit_a != bit_b) { | |
3237 | err = proc_put_char(&buffer, &left, '-'); | |
3238 | if (err) | |
3239 | break; | |
3240 | err = proc_put_long(&buffer, &left, bit_b, false); | |
3241 | if (err) | |
3242 | break; | |
3243 | } | |
3244 | ||
3245 | first = 0; bit_b++; | |
3246 | } | |
3247 | if (!err) | |
3248 | err = proc_put_char(&buffer, &left, '\n'); | |
3249 | } | |
3250 | ||
3251 | if (!err) { | |
3252 | if (write) { | |
3253 | if (*ppos) | |
3254 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
3255 | else | |
5a04cca6 | 3256 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 | 3257 | } |
9f977fb7 OP |
3258 | *lenp -= left; |
3259 | *ppos += *lenp; | |
9f977fb7 | 3260 | } |
f9eb2fdd OK |
3261 | |
3262 | kfree(tmp_bitmap); | |
3263 | return err; | |
9f977fb7 OP |
3264 | } |
3265 | ||
55610500 | 3266 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3267 | |
8d65af78 | 3268 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
3269 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3270 | { | |
3271 | return -ENOSYS; | |
3272 | } | |
3273 | ||
8d65af78 | 3274 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 3275 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
3276 | { |
3277 | return -ENOSYS; | |
3278 | } | |
3279 | ||
e7d316a0 SAK |
3280 | int proc_douintvec(struct ctl_table *table, int write, |
3281 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3282 | { | |
3283 | return -ENOSYS; | |
3284 | } | |
3285 | ||
8d65af78 | 3286 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3287 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3288 | { | |
3289 | return -ENOSYS; | |
3290 | } | |
3291 | ||
61d9b56a LR |
3292 | int proc_douintvec_minmax(struct ctl_table *table, int write, |
3293 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3294 | { | |
3295 | return -ENOSYS; | |
3296 | } | |
3297 | ||
8d65af78 | 3298 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3299 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3300 | { | |
3301 | return -ENOSYS; | |
3302 | } | |
3303 | ||
8d65af78 | 3304 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3305 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3306 | { | |
3307 | return -ENOSYS; | |
3308 | } | |
3309 | ||
8d65af78 | 3310 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3311 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3312 | { | |
3313 | return -ENOSYS; | |
3314 | } | |
3315 | ||
8d65af78 | 3316 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3317 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3318 | { | |
3319 | return -ENOSYS; | |
3320 | } | |
3321 | ||
d8217f07 | 3322 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3323 | void __user *buffer, |
3324 | size_t *lenp, loff_t *ppos) | |
3325 | { | |
3326 | return -ENOSYS; | |
3327 | } | |
3328 | ||
3329 | ||
55610500 | 3330 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3331 | |
78c3aff8 | 3332 | #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL) |
492ecee8 AS |
3333 | static int proc_dointvec_minmax_bpf_stats(struct ctl_table *table, int write, |
3334 | void __user *buffer, size_t *lenp, | |
3335 | loff_t *ppos) | |
3336 | { | |
3337 | int ret, bpf_stats = *(int *)table->data; | |
3338 | struct ctl_table tmp = *table; | |
3339 | ||
3340 | if (write && !capable(CAP_SYS_ADMIN)) | |
3341 | return -EPERM; | |
3342 | ||
3343 | tmp.data = &bpf_stats; | |
3344 | ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); | |
3345 | if (write && !ret) { | |
3346 | *(int *)table->data = bpf_stats; | |
3347 | if (bpf_stats) | |
3348 | static_branch_enable(&bpf_stats_enabled_key); | |
3349 | else | |
3350 | static_branch_disable(&bpf_stats_enabled_key); | |
3351 | } | |
3352 | return ret; | |
3353 | } | |
3fcc5530 | 3354 | #endif |
1da177e4 LT |
3355 | /* |
3356 | * No sense putting this after each symbol definition, twice, | |
3357 | * exception granted :-) | |
3358 | */ | |
3359 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 3360 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
3361 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
3362 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 3363 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
1da177e4 LT |
3364 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
3365 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3366 | EXPORT_SYMBOL(proc_dostring); | |
3367 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3368 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |