Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sysctl.c: General linux system control interface | |
3 | * | |
4 | * Begun 24 March 1995, Stephen Tweedie | |
5 | * Added /proc support, Dec 1995 | |
6 | * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. | |
7 | * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. | |
8 | * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. | |
9 | * Dynamic registration fixes, Stephen Tweedie. | |
10 | * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. | |
11 | * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris | |
12 | * Horn. | |
13 | * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. | |
14 | * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. | |
15 | * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill | |
16 | * Wendling. | |
17 | * The list_for_each() macro wasn't appropriate for the sysctl loop. | |
18 | * Removed it and replaced it with older style, 03/23/00, Bill Wendling | |
19 | */ | |
20 | ||
1da177e4 | 21 | #include <linux/module.h> |
e2e40f2c | 22 | #include <linux/aio.h> |
1da177e4 LT |
23 | #include <linux/mm.h> |
24 | #include <linux/swap.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/sysctl.h> | |
5a04cca6 | 27 | #include <linux/bitmap.h> |
d33ed52d | 28 | #include <linux/signal.h> |
455cd5ab | 29 | #include <linux/printk.h> |
1da177e4 | 30 | #include <linux/proc_fs.h> |
72c2d582 | 31 | #include <linux/security.h> |
1da177e4 | 32 | #include <linux/ctype.h> |
fd4b616b | 33 | #include <linux/kmemleak.h> |
62239ac2 | 34 | #include <linux/fs.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | #include <linux/kernel.h> | |
0296b228 | 37 | #include <linux/kobject.h> |
20380731 | 38 | #include <linux/net.h> |
1da177e4 LT |
39 | #include <linux/sysrq.h> |
40 | #include <linux/highuid.h> | |
41 | #include <linux/writeback.h> | |
3fff4c42 | 42 | #include <linux/ratelimit.h> |
76ab0f53 | 43 | #include <linux/compaction.h> |
1da177e4 | 44 | #include <linux/hugetlb.h> |
1da177e4 | 45 | #include <linux/initrd.h> |
0b77f5bf | 46 | #include <linux/key.h> |
1da177e4 LT |
47 | #include <linux/times.h> |
48 | #include <linux/limits.h> | |
49 | #include <linux/dcache.h> | |
6e006701 | 50 | #include <linux/dnotify.h> |
1da177e4 | 51 | #include <linux/syscalls.h> |
c748e134 | 52 | #include <linux/vmstat.h> |
c255d844 PM |
53 | #include <linux/nfs_fs.h> |
54 | #include <linux/acpi.h> | |
10a0a8d4 | 55 | #include <linux/reboot.h> |
b0fc494f | 56 | #include <linux/ftrace.h> |
cdd6c482 | 57 | #include <linux/perf_event.h> |
b2be84df | 58 | #include <linux/kprobes.h> |
b492e95b | 59 | #include <linux/pipe_fs_i.h> |
8e4228e1 | 60 | #include <linux/oom.h> |
17f60a7d | 61 | #include <linux/kmod.h> |
73efc039 | 62 | #include <linux/capability.h> |
40401530 | 63 | #include <linux/binfmts.h> |
cf4aebc2 | 64 | #include <linux/sched/sysctl.h> |
f7ccbae4 | 65 | #include <linux/sched/coredump.h> |
7984754b | 66 | #include <linux/kexec.h> |
1be7f75d | 67 | #include <linux/bpf.h> |
d2921684 | 68 | #include <linux/mount.h> |
7a8d1819 | 69 | #include <linux/pipe_fs_i.h> |
1da177e4 | 70 | |
7c0f6ba6 | 71 | #include <linux/uaccess.h> |
1da177e4 LT |
72 | #include <asm/processor.h> |
73 | ||
29cbc78b AK |
74 | #ifdef CONFIG_X86 |
75 | #include <asm/nmi.h> | |
0741f4d2 | 76 | #include <asm/stacktrace.h> |
6e7c4025 | 77 | #include <asm/io.h> |
29cbc78b | 78 | #endif |
d550bbd4 DH |
79 | #ifdef CONFIG_SPARC |
80 | #include <asm/setup.h> | |
81 | #endif | |
c55b7c3e DY |
82 | #ifdef CONFIG_BSD_PROCESS_ACCT |
83 | #include <linux/acct.h> | |
84 | #endif | |
4f0e056f DY |
85 | #ifdef CONFIG_RT_MUTEXES |
86 | #include <linux/rtmutex.h> | |
87 | #endif | |
2edf5e49 DY |
88 | #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) |
89 | #include <linux/lockdep.h> | |
90 | #endif | |
15485a46 DY |
91 | #ifdef CONFIG_CHR_DEV_SG |
92 | #include <scsi/sg.h> | |
93 | #endif | |
29cbc78b | 94 | |
58687acb | 95 | #ifdef CONFIG_LOCKUP_DETECTOR |
504d7cf1 DZ |
96 | #include <linux/nmi.h> |
97 | #endif | |
98 | ||
1da177e4 LT |
99 | #if defined(CONFIG_SYSCTL) |
100 | ||
101 | /* External variables not in a header file. */ | |
d6e71144 | 102 | extern int suid_dumpable; |
046d662f AK |
103 | #ifdef CONFIG_COREDUMP |
104 | extern int core_uses_pid; | |
1da177e4 | 105 | extern char core_pattern[]; |
a293980c | 106 | extern unsigned int core_pipe_limit; |
046d662f | 107 | #endif |
1da177e4 | 108 | extern int pid_max; |
1da177e4 | 109 | extern int pid_max_min, pid_max_max; |
8ad4b1fb | 110 | extern int percpu_pagelist_fraction; |
9745512c | 111 | extern int latencytop_enabled; |
9b80a184 | 112 | extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max; |
dd8632a1 PM |
113 | #ifndef CONFIG_MMU |
114 | extern int sysctl_nr_trim_pages; | |
115 | #endif | |
1da177e4 | 116 | |
c4f3b63f | 117 | /* Constants used for minimum and maximum */ |
2508ce18 | 118 | #ifdef CONFIG_LOCKUP_DETECTOR |
c4f3b63f RT |
119 | static int sixty = 60; |
120 | #endif | |
121 | ||
270750db AT |
122 | static int __maybe_unused neg_one = -1; |
123 | ||
c4f3b63f | 124 | static int zero; |
cd5f9a4c LT |
125 | static int __maybe_unused one = 1; |
126 | static int __maybe_unused two = 2; | |
5509a5d2 | 127 | static int __maybe_unused four = 4; |
fc3501d4 | 128 | static unsigned long one_ul = 1; |
c4f3b63f | 129 | static int one_hundred = 100; |
795ae7a0 | 130 | static int one_thousand = 1000; |
af91322e DY |
131 | #ifdef CONFIG_PRINTK |
132 | static int ten_thousand = 10000; | |
133 | #endif | |
c5dfd78e ACM |
134 | #ifdef CONFIG_PERF_EVENTS |
135 | static int six_hundred_forty_kb = 640 * 1024; | |
136 | #endif | |
c4f3b63f | 137 | |
9e4a5bda AR |
138 | /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ |
139 | static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; | |
140 | ||
1da177e4 LT |
141 | /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
142 | static int maxolduid = 65535; | |
143 | static int minolduid; | |
144 | ||
145 | static int ngroups_max = NGROUPS_MAX; | |
73efc039 | 146 | static const int cap_last_cap = CAP_LAST_CAP; |
1da177e4 | 147 | |
80df2847 LH |
148 | /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ |
149 | #ifdef CONFIG_DETECT_HUNG_TASK | |
150 | static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); | |
151 | #endif | |
152 | ||
d14f1729 DY |
153 | #ifdef CONFIG_INOTIFY_USER |
154 | #include <linux/inotify.h> | |
155 | #endif | |
72c57ed5 | 156 | #ifdef CONFIG_SPARC |
1da177e4 LT |
157 | #endif |
158 | ||
159 | #ifdef __hppa__ | |
160 | extern int pwrsw_enabled; | |
bf14e3b9 VG |
161 | #endif |
162 | ||
163 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 LT |
164 | extern int unaligned_enabled; |
165 | #endif | |
1da177e4 | 166 | |
d2b176ed | 167 | #ifdef CONFIG_IA64 |
88fc241f | 168 | extern int unaligned_dump_stack; |
d2b176ed JS |
169 | #endif |
170 | ||
b6fca725 VG |
171 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
172 | extern int no_unaligned_warning; | |
173 | #endif | |
174 | ||
d6f8ff73 | 175 | #ifdef CONFIG_PROC_SYSCTL |
f4aacea2 | 176 | |
a19ac337 LR |
177 | /** |
178 | * enum sysctl_writes_mode - supported sysctl write modes | |
179 | * | |
180 | * @SYSCTL_WRITES_LEGACY: each write syscall must fully contain the sysctl value | |
181 | * to be written, and multiple writes on the same sysctl file descriptor | |
182 | * will rewrite the sysctl value, regardless of file position. No warning | |
183 | * is issued when the initial position is not 0. | |
184 | * @SYSCTL_WRITES_WARN: same as above but warn when the initial file position is | |
185 | * not 0. | |
186 | * @SYSCTL_WRITES_STRICT: writes to numeric sysctl entries must always be at | |
187 | * file position 0 and the value must be fully contained in the buffer | |
188 | * sent to the write syscall. If dealing with strings respect the file | |
189 | * position, but restrict this to the max length of the buffer, anything | |
190 | * passed the max lenght will be ignored. Multiple writes will append | |
191 | * to the buffer. | |
192 | * | |
193 | * These write modes control how current file position affects the behavior of | |
194 | * updating sysctl values through the proc interface on each write. | |
195 | */ | |
196 | enum sysctl_writes_mode { | |
197 | SYSCTL_WRITES_LEGACY = -1, | |
198 | SYSCTL_WRITES_WARN = 0, | |
199 | SYSCTL_WRITES_STRICT = 1, | |
200 | }; | |
f4aacea2 | 201 | |
a19ac337 | 202 | static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT; |
f4aacea2 | 203 | |
8d65af78 | 204 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 | 205 | void __user *buffer, size_t *lenp, loff_t *ppos); |
8d65af78 | 206 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 | 207 | void __user *buffer, size_t *lenp, loff_t *ppos); |
d6f8ff73 | 208 | #endif |
9ec52099 | 209 | |
bfdc0b49 | 210 | #ifdef CONFIG_PRINTK |
620f6e8e | 211 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
212 | void __user *buffer, size_t *lenp, loff_t *ppos); |
213 | #endif | |
214 | ||
54b50199 KC |
215 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, |
216 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 217 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
218 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
219 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
046d662f | 220 | #endif |
319e0a21 EB |
221 | static int proc_dopipe_max_size(struct ctl_table *table, int write, |
222 | void __user *buffer, size_t *lenp, loff_t *ppos); | |
54b50199 | 223 | |
97f5f0cd | 224 | #ifdef CONFIG_MAGIC_SYSRQ |
8c6a98b2 | 225 | /* Note: sysrq code uses it's own private copy */ |
8eaede49 | 226 | static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; |
97f5f0cd | 227 | |
6f8fd1d7 | 228 | static int sysrq_sysctl_handler(struct ctl_table *table, int write, |
97f5f0cd DT |
229 | void __user *buffer, size_t *lenp, |
230 | loff_t *ppos) | |
231 | { | |
232 | int error; | |
233 | ||
234 | error = proc_dointvec(table, write, buffer, lenp, ppos); | |
235 | if (error) | |
236 | return error; | |
237 | ||
238 | if (write) | |
239 | sysrq_toggle_support(__sysrq_enabled); | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | #endif | |
245 | ||
d8217f07 EB |
246 | static struct ctl_table kern_table[]; |
247 | static struct ctl_table vm_table[]; | |
248 | static struct ctl_table fs_table[]; | |
249 | static struct ctl_table debug_table[]; | |
250 | static struct ctl_table dev_table[]; | |
251 | extern struct ctl_table random_table[]; | |
7ef9964e DL |
252 | #ifdef CONFIG_EPOLL |
253 | extern struct ctl_table epoll_table[]; | |
254 | #endif | |
1da177e4 LT |
255 | |
256 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
257 | int sysctl_legacy_va_layout; | |
258 | #endif | |
259 | ||
1da177e4 LT |
260 | /* The default sysctl tables: */ |
261 | ||
de4e83bd | 262 | static struct ctl_table sysctl_base_table[] = { |
1da177e4 | 263 | { |
1da177e4 LT |
264 | .procname = "kernel", |
265 | .mode = 0555, | |
266 | .child = kern_table, | |
267 | }, | |
268 | { | |
1da177e4 LT |
269 | .procname = "vm", |
270 | .mode = 0555, | |
271 | .child = vm_table, | |
272 | }, | |
1da177e4 | 273 | { |
1da177e4 LT |
274 | .procname = "fs", |
275 | .mode = 0555, | |
276 | .child = fs_table, | |
277 | }, | |
278 | { | |
1da177e4 LT |
279 | .procname = "debug", |
280 | .mode = 0555, | |
281 | .child = debug_table, | |
282 | }, | |
283 | { | |
1da177e4 LT |
284 | .procname = "dev", |
285 | .mode = 0555, | |
286 | .child = dev_table, | |
287 | }, | |
6fce56ec | 288 | { } |
1da177e4 LT |
289 | }; |
290 | ||
77e54a1f | 291 | #ifdef CONFIG_SCHED_DEBUG |
73c4efd2 ED |
292 | static int min_sched_granularity_ns = 100000; /* 100 usecs */ |
293 | static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
294 | static int min_wakeup_granularity_ns; /* 0 usecs */ | |
295 | static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ | |
cbee9f88 | 296 | #ifdef CONFIG_SMP |
1983a922 CE |
297 | static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; |
298 | static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; | |
cbee9f88 PZ |
299 | #endif /* CONFIG_SMP */ |
300 | #endif /* CONFIG_SCHED_DEBUG */ | |
77e54a1f | 301 | |
5e771905 MG |
302 | #ifdef CONFIG_COMPACTION |
303 | static int min_extfrag_threshold; | |
304 | static int max_extfrag_threshold = 1000; | |
305 | #endif | |
306 | ||
d8217f07 | 307 | static struct ctl_table kern_table[] = { |
2bba22c5 | 308 | { |
2bba22c5 MG |
309 | .procname = "sched_child_runs_first", |
310 | .data = &sysctl_sched_child_runs_first, | |
311 | .maxlen = sizeof(unsigned int), | |
312 | .mode = 0644, | |
6d456111 | 313 | .proc_handler = proc_dointvec, |
2bba22c5 | 314 | }, |
77e54a1f IM |
315 | #ifdef CONFIG_SCHED_DEBUG |
316 | { | |
b2be5e96 PZ |
317 | .procname = "sched_min_granularity_ns", |
318 | .data = &sysctl_sched_min_granularity, | |
77e54a1f IM |
319 | .maxlen = sizeof(unsigned int), |
320 | .mode = 0644, | |
702a7c76 | 321 | .proc_handler = sched_proc_update_handler, |
b2be5e96 PZ |
322 | .extra1 = &min_sched_granularity_ns, |
323 | .extra2 = &max_sched_granularity_ns, | |
77e54a1f | 324 | }, |
21805085 | 325 | { |
21805085 PZ |
326 | .procname = "sched_latency_ns", |
327 | .data = &sysctl_sched_latency, | |
328 | .maxlen = sizeof(unsigned int), | |
329 | .mode = 0644, | |
702a7c76 | 330 | .proc_handler = sched_proc_update_handler, |
21805085 PZ |
331 | .extra1 = &min_sched_granularity_ns, |
332 | .extra2 = &max_sched_granularity_ns, | |
333 | }, | |
77e54a1f | 334 | { |
77e54a1f IM |
335 | .procname = "sched_wakeup_granularity_ns", |
336 | .data = &sysctl_sched_wakeup_granularity, | |
337 | .maxlen = sizeof(unsigned int), | |
338 | .mode = 0644, | |
702a7c76 | 339 | .proc_handler = sched_proc_update_handler, |
77e54a1f IM |
340 | .extra1 = &min_wakeup_granularity_ns, |
341 | .extra2 = &max_wakeup_granularity_ns, | |
342 | }, | |
cbee9f88 | 343 | #ifdef CONFIG_SMP |
1983a922 | 344 | { |
1983a922 CE |
345 | .procname = "sched_tunable_scaling", |
346 | .data = &sysctl_sched_tunable_scaling, | |
347 | .maxlen = sizeof(enum sched_tunable_scaling), | |
348 | .mode = 0644, | |
702a7c76 | 349 | .proc_handler = sched_proc_update_handler, |
1983a922 CE |
350 | .extra1 = &min_sched_tunable_scaling, |
351 | .extra2 = &max_sched_tunable_scaling, | |
2398f2c6 | 352 | }, |
da84d961 | 353 | { |
d00535db | 354 | .procname = "sched_migration_cost_ns", |
da84d961 IM |
355 | .data = &sysctl_sched_migration_cost, |
356 | .maxlen = sizeof(unsigned int), | |
357 | .mode = 0644, | |
6d456111 | 358 | .proc_handler = proc_dointvec, |
da84d961 | 359 | }, |
b82d9fdd | 360 | { |
b82d9fdd PZ |
361 | .procname = "sched_nr_migrate", |
362 | .data = &sysctl_sched_nr_migrate, | |
363 | .maxlen = sizeof(unsigned int), | |
fa85ae24 | 364 | .mode = 0644, |
6d456111 | 365 | .proc_handler = proc_dointvec, |
fa85ae24 | 366 | }, |
e9e9250b | 367 | { |
d00535db | 368 | .procname = "sched_time_avg_ms", |
e9e9250b PZ |
369 | .data = &sysctl_sched_time_avg, |
370 | .maxlen = sizeof(unsigned int), | |
371 | .mode = 0644, | |
5ccba44b EZ |
372 | .proc_handler = proc_dointvec_minmax, |
373 | .extra1 = &one, | |
e9e9250b | 374 | }, |
cb251765 MG |
375 | #ifdef CONFIG_SCHEDSTATS |
376 | { | |
377 | .procname = "sched_schedstats", | |
378 | .data = NULL, | |
379 | .maxlen = sizeof(unsigned int), | |
380 | .mode = 0644, | |
381 | .proc_handler = sysctl_schedstats, | |
382 | .extra1 = &zero, | |
383 | .extra2 = &one, | |
384 | }, | |
385 | #endif /* CONFIG_SCHEDSTATS */ | |
cbee9f88 PZ |
386 | #endif /* CONFIG_SMP */ |
387 | #ifdef CONFIG_NUMA_BALANCING | |
4b96a29b PZ |
388 | { |
389 | .procname = "numa_balancing_scan_delay_ms", | |
390 | .data = &sysctl_numa_balancing_scan_delay, | |
391 | .maxlen = sizeof(unsigned int), | |
392 | .mode = 0644, | |
393 | .proc_handler = proc_dointvec, | |
394 | }, | |
cbee9f88 PZ |
395 | { |
396 | .procname = "numa_balancing_scan_period_min_ms", | |
397 | .data = &sysctl_numa_balancing_scan_period_min, | |
398 | .maxlen = sizeof(unsigned int), | |
399 | .mode = 0644, | |
400 | .proc_handler = proc_dointvec, | |
401 | }, | |
402 | { | |
403 | .procname = "numa_balancing_scan_period_max_ms", | |
404 | .data = &sysctl_numa_balancing_scan_period_max, | |
405 | .maxlen = sizeof(unsigned int), | |
406 | .mode = 0644, | |
407 | .proc_handler = proc_dointvec, | |
408 | }, | |
6e5fb223 PZ |
409 | { |
410 | .procname = "numa_balancing_scan_size_mb", | |
411 | .data = &sysctl_numa_balancing_scan_size, | |
412 | .maxlen = sizeof(unsigned int), | |
413 | .mode = 0644, | |
64192658 KT |
414 | .proc_handler = proc_dointvec_minmax, |
415 | .extra1 = &one, | |
6e5fb223 | 416 | }, |
54a43d54 AK |
417 | { |
418 | .procname = "numa_balancing", | |
419 | .data = NULL, /* filled in by handler */ | |
420 | .maxlen = sizeof(unsigned int), | |
421 | .mode = 0644, | |
422 | .proc_handler = sysctl_numa_balancing, | |
423 | .extra1 = &zero, | |
424 | .extra2 = &one, | |
425 | }, | |
cbee9f88 PZ |
426 | #endif /* CONFIG_NUMA_BALANCING */ |
427 | #endif /* CONFIG_SCHED_DEBUG */ | |
9f0c1e56 | 428 | { |
9f0c1e56 PZ |
429 | .procname = "sched_rt_period_us", |
430 | .data = &sysctl_sched_rt_period, | |
431 | .maxlen = sizeof(unsigned int), | |
432 | .mode = 0644, | |
6d456111 | 433 | .proc_handler = sched_rt_handler, |
9f0c1e56 PZ |
434 | }, |
435 | { | |
9f0c1e56 PZ |
436 | .procname = "sched_rt_runtime_us", |
437 | .data = &sysctl_sched_rt_runtime, | |
438 | .maxlen = sizeof(int), | |
439 | .mode = 0644, | |
6d456111 | 440 | .proc_handler = sched_rt_handler, |
9f0c1e56 | 441 | }, |
ce0dbbbb CW |
442 | { |
443 | .procname = "sched_rr_timeslice_ms", | |
975e155e | 444 | .data = &sysctl_sched_rr_timeslice, |
ce0dbbbb CW |
445 | .maxlen = sizeof(int), |
446 | .mode = 0644, | |
447 | .proc_handler = sched_rr_handler, | |
448 | }, | |
5091faa4 MG |
449 | #ifdef CONFIG_SCHED_AUTOGROUP |
450 | { | |
451 | .procname = "sched_autogroup_enabled", | |
452 | .data = &sysctl_sched_autogroup_enabled, | |
453 | .maxlen = sizeof(unsigned int), | |
454 | .mode = 0644, | |
1747b21f | 455 | .proc_handler = proc_dointvec_minmax, |
5091faa4 MG |
456 | .extra1 = &zero, |
457 | .extra2 = &one, | |
458 | }, | |
459 | #endif | |
ec12cb7f PT |
460 | #ifdef CONFIG_CFS_BANDWIDTH |
461 | { | |
462 | .procname = "sched_cfs_bandwidth_slice_us", | |
463 | .data = &sysctl_sched_cfs_bandwidth_slice, | |
464 | .maxlen = sizeof(unsigned int), | |
465 | .mode = 0644, | |
466 | .proc_handler = proc_dointvec_minmax, | |
467 | .extra1 = &one, | |
468 | }, | |
469 | #endif | |
f20786ff PZ |
470 | #ifdef CONFIG_PROVE_LOCKING |
471 | { | |
f20786ff PZ |
472 | .procname = "prove_locking", |
473 | .data = &prove_locking, | |
474 | .maxlen = sizeof(int), | |
475 | .mode = 0644, | |
6d456111 | 476 | .proc_handler = proc_dointvec, |
f20786ff PZ |
477 | }, |
478 | #endif | |
479 | #ifdef CONFIG_LOCK_STAT | |
480 | { | |
f20786ff PZ |
481 | .procname = "lock_stat", |
482 | .data = &lock_stat, | |
483 | .maxlen = sizeof(int), | |
484 | .mode = 0644, | |
6d456111 | 485 | .proc_handler = proc_dointvec, |
f20786ff | 486 | }, |
77e54a1f | 487 | #endif |
1da177e4 | 488 | { |
1da177e4 LT |
489 | .procname = "panic", |
490 | .data = &panic_timeout, | |
491 | .maxlen = sizeof(int), | |
492 | .mode = 0644, | |
6d456111 | 493 | .proc_handler = proc_dointvec, |
1da177e4 | 494 | }, |
046d662f | 495 | #ifdef CONFIG_COREDUMP |
1da177e4 | 496 | { |
1da177e4 LT |
497 | .procname = "core_uses_pid", |
498 | .data = &core_uses_pid, | |
499 | .maxlen = sizeof(int), | |
500 | .mode = 0644, | |
6d456111 | 501 | .proc_handler = proc_dointvec, |
1da177e4 LT |
502 | }, |
503 | { | |
1da177e4 LT |
504 | .procname = "core_pattern", |
505 | .data = core_pattern, | |
71ce92f3 | 506 | .maxlen = CORENAME_MAX_SIZE, |
1da177e4 | 507 | .mode = 0644, |
54b50199 | 508 | .proc_handler = proc_dostring_coredump, |
1da177e4 | 509 | }, |
a293980c | 510 | { |
a293980c NH |
511 | .procname = "core_pipe_limit", |
512 | .data = &core_pipe_limit, | |
513 | .maxlen = sizeof(unsigned int), | |
514 | .mode = 0644, | |
6d456111 | 515 | .proc_handler = proc_dointvec, |
a293980c | 516 | }, |
046d662f | 517 | #endif |
34f5a398 | 518 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 519 | { |
1da177e4 | 520 | .procname = "tainted", |
25ddbb18 | 521 | .maxlen = sizeof(long), |
34f5a398 | 522 | .mode = 0644, |
6d456111 | 523 | .proc_handler = proc_taint, |
1da177e4 | 524 | }, |
f4aacea2 KC |
525 | { |
526 | .procname = "sysctl_writes_strict", | |
527 | .data = &sysctl_writes_strict, | |
528 | .maxlen = sizeof(int), | |
529 | .mode = 0644, | |
530 | .proc_handler = proc_dointvec_minmax, | |
531 | .extra1 = &neg_one, | |
532 | .extra2 = &one, | |
533 | }, | |
34f5a398 | 534 | #endif |
9745512c AV |
535 | #ifdef CONFIG_LATENCYTOP |
536 | { | |
537 | .procname = "latencytop", | |
538 | .data = &latencytop_enabled, | |
539 | .maxlen = sizeof(int), | |
540 | .mode = 0644, | |
cb251765 | 541 | .proc_handler = sysctl_latencytop, |
9745512c AV |
542 | }, |
543 | #endif | |
1da177e4 LT |
544 | #ifdef CONFIG_BLK_DEV_INITRD |
545 | { | |
1da177e4 LT |
546 | .procname = "real-root-dev", |
547 | .data = &real_root_dev, | |
548 | .maxlen = sizeof(int), | |
549 | .mode = 0644, | |
6d456111 | 550 | .proc_handler = proc_dointvec, |
1da177e4 LT |
551 | }, |
552 | #endif | |
45807a1d | 553 | { |
45807a1d IM |
554 | .procname = "print-fatal-signals", |
555 | .data = &print_fatal_signals, | |
556 | .maxlen = sizeof(int), | |
557 | .mode = 0644, | |
6d456111 | 558 | .proc_handler = proc_dointvec, |
45807a1d | 559 | }, |
72c57ed5 | 560 | #ifdef CONFIG_SPARC |
1da177e4 | 561 | { |
1da177e4 LT |
562 | .procname = "reboot-cmd", |
563 | .data = reboot_command, | |
564 | .maxlen = 256, | |
565 | .mode = 0644, | |
6d456111 | 566 | .proc_handler = proc_dostring, |
1da177e4 LT |
567 | }, |
568 | { | |
1da177e4 LT |
569 | .procname = "stop-a", |
570 | .data = &stop_a_enabled, | |
571 | .maxlen = sizeof (int), | |
572 | .mode = 0644, | |
6d456111 | 573 | .proc_handler = proc_dointvec, |
1da177e4 LT |
574 | }, |
575 | { | |
1da177e4 LT |
576 | .procname = "scons-poweroff", |
577 | .data = &scons_pwroff, | |
578 | .maxlen = sizeof (int), | |
579 | .mode = 0644, | |
6d456111 | 580 | .proc_handler = proc_dointvec, |
1da177e4 LT |
581 | }, |
582 | #endif | |
0871420f DM |
583 | #ifdef CONFIG_SPARC64 |
584 | { | |
0871420f DM |
585 | .procname = "tsb-ratio", |
586 | .data = &sysctl_tsb_ratio, | |
587 | .maxlen = sizeof (int), | |
588 | .mode = 0644, | |
6d456111 | 589 | .proc_handler = proc_dointvec, |
0871420f DM |
590 | }, |
591 | #endif | |
1da177e4 LT |
592 | #ifdef __hppa__ |
593 | { | |
1da177e4 LT |
594 | .procname = "soft-power", |
595 | .data = &pwrsw_enabled, | |
596 | .maxlen = sizeof (int), | |
597 | .mode = 0644, | |
6d456111 | 598 | .proc_handler = proc_dointvec, |
1da177e4 | 599 | }, |
bf14e3b9 VG |
600 | #endif |
601 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW | |
1da177e4 | 602 | { |
1da177e4 LT |
603 | .procname = "unaligned-trap", |
604 | .data = &unaligned_enabled, | |
605 | .maxlen = sizeof (int), | |
606 | .mode = 0644, | |
6d456111 | 607 | .proc_handler = proc_dointvec, |
1da177e4 LT |
608 | }, |
609 | #endif | |
610 | { | |
1da177e4 LT |
611 | .procname = "ctrl-alt-del", |
612 | .data = &C_A_D, | |
613 | .maxlen = sizeof(int), | |
614 | .mode = 0644, | |
6d456111 | 615 | .proc_handler = proc_dointvec, |
1da177e4 | 616 | }, |
606576ce | 617 | #ifdef CONFIG_FUNCTION_TRACER |
b0fc494f | 618 | { |
b0fc494f SR |
619 | .procname = "ftrace_enabled", |
620 | .data = &ftrace_enabled, | |
621 | .maxlen = sizeof(int), | |
622 | .mode = 0644, | |
6d456111 | 623 | .proc_handler = ftrace_enable_sysctl, |
b0fc494f SR |
624 | }, |
625 | #endif | |
f38f1d2a SR |
626 | #ifdef CONFIG_STACK_TRACER |
627 | { | |
f38f1d2a SR |
628 | .procname = "stack_tracer_enabled", |
629 | .data = &stack_tracer_enabled, | |
630 | .maxlen = sizeof(int), | |
631 | .mode = 0644, | |
6d456111 | 632 | .proc_handler = stack_trace_sysctl, |
f38f1d2a SR |
633 | }, |
634 | #endif | |
944ac425 SR |
635 | #ifdef CONFIG_TRACING |
636 | { | |
3299b4dd | 637 | .procname = "ftrace_dump_on_oops", |
944ac425 SR |
638 | .data = &ftrace_dump_on_oops, |
639 | .maxlen = sizeof(int), | |
640 | .mode = 0644, | |
6d456111 | 641 | .proc_handler = proc_dointvec, |
944ac425 | 642 | }, |
de7edd31 SRRH |
643 | { |
644 | .procname = "traceoff_on_warning", | |
645 | .data = &__disable_trace_on_warning, | |
646 | .maxlen = sizeof(__disable_trace_on_warning), | |
647 | .mode = 0644, | |
648 | .proc_handler = proc_dointvec, | |
649 | }, | |
0daa2302 SRRH |
650 | { |
651 | .procname = "tracepoint_printk", | |
652 | .data = &tracepoint_printk, | |
653 | .maxlen = sizeof(tracepoint_printk), | |
654 | .mode = 0644, | |
42391745 | 655 | .proc_handler = tracepoint_printk_sysctl, |
0daa2302 | 656 | }, |
944ac425 | 657 | #endif |
2965faa5 | 658 | #ifdef CONFIG_KEXEC_CORE |
7984754b KC |
659 | { |
660 | .procname = "kexec_load_disabled", | |
661 | .data = &kexec_load_disabled, | |
662 | .maxlen = sizeof(int), | |
663 | .mode = 0644, | |
664 | /* only handle a transition from default "0" to "1" */ | |
665 | .proc_handler = proc_dointvec_minmax, | |
666 | .extra1 = &one, | |
667 | .extra2 = &one, | |
668 | }, | |
669 | #endif | |
a1ef5adb | 670 | #ifdef CONFIG_MODULES |
1da177e4 | 671 | { |
1da177e4 LT |
672 | .procname = "modprobe", |
673 | .data = &modprobe_path, | |
674 | .maxlen = KMOD_PATH_LEN, | |
675 | .mode = 0644, | |
6d456111 | 676 | .proc_handler = proc_dostring, |
1da177e4 | 677 | }, |
3d43321b | 678 | { |
3d43321b KC |
679 | .procname = "modules_disabled", |
680 | .data = &modules_disabled, | |
681 | .maxlen = sizeof(int), | |
682 | .mode = 0644, | |
683 | /* only handle a transition from default "0" to "1" */ | |
6d456111 | 684 | .proc_handler = proc_dointvec_minmax, |
3d43321b KC |
685 | .extra1 = &one, |
686 | .extra2 = &one, | |
687 | }, | |
1da177e4 | 688 | #endif |
86d56134 | 689 | #ifdef CONFIG_UEVENT_HELPER |
1da177e4 | 690 | { |
1da177e4 | 691 | .procname = "hotplug", |
312c004d KS |
692 | .data = &uevent_helper, |
693 | .maxlen = UEVENT_HELPER_PATH_LEN, | |
1da177e4 | 694 | .mode = 0644, |
6d456111 | 695 | .proc_handler = proc_dostring, |
1da177e4 | 696 | }, |
86d56134 | 697 | #endif |
1da177e4 LT |
698 | #ifdef CONFIG_CHR_DEV_SG |
699 | { | |
1da177e4 LT |
700 | .procname = "sg-big-buff", |
701 | .data = &sg_big_buff, | |
702 | .maxlen = sizeof (int), | |
703 | .mode = 0444, | |
6d456111 | 704 | .proc_handler = proc_dointvec, |
1da177e4 LT |
705 | }, |
706 | #endif | |
707 | #ifdef CONFIG_BSD_PROCESS_ACCT | |
708 | { | |
1da177e4 LT |
709 | .procname = "acct", |
710 | .data = &acct_parm, | |
711 | .maxlen = 3*sizeof(int), | |
712 | .mode = 0644, | |
6d456111 | 713 | .proc_handler = proc_dointvec, |
1da177e4 LT |
714 | }, |
715 | #endif | |
1da177e4 LT |
716 | #ifdef CONFIG_MAGIC_SYSRQ |
717 | { | |
1da177e4 | 718 | .procname = "sysrq", |
5d6f647f | 719 | .data = &__sysrq_enabled, |
1da177e4 LT |
720 | .maxlen = sizeof (int), |
721 | .mode = 0644, | |
97f5f0cd | 722 | .proc_handler = sysrq_sysctl_handler, |
1da177e4 LT |
723 | }, |
724 | #endif | |
d6f8ff73 | 725 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 726 | { |
1da177e4 | 727 | .procname = "cad_pid", |
9ec52099 | 728 | .data = NULL, |
1da177e4 LT |
729 | .maxlen = sizeof (int), |
730 | .mode = 0600, | |
6d456111 | 731 | .proc_handler = proc_do_cad_pid, |
1da177e4 | 732 | }, |
d6f8ff73 | 733 | #endif |
1da177e4 | 734 | { |
1da177e4 | 735 | .procname = "threads-max", |
16db3d3f | 736 | .data = NULL, |
1da177e4 LT |
737 | .maxlen = sizeof(int), |
738 | .mode = 0644, | |
16db3d3f | 739 | .proc_handler = sysctl_max_threads, |
1da177e4 LT |
740 | }, |
741 | { | |
1da177e4 LT |
742 | .procname = "random", |
743 | .mode = 0555, | |
744 | .child = random_table, | |
745 | }, | |
17f60a7d EP |
746 | { |
747 | .procname = "usermodehelper", | |
748 | .mode = 0555, | |
749 | .child = usermodehelper_table, | |
750 | }, | |
1da177e4 | 751 | { |
1da177e4 LT |
752 | .procname = "overflowuid", |
753 | .data = &overflowuid, | |
754 | .maxlen = sizeof(int), | |
755 | .mode = 0644, | |
6d456111 | 756 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
757 | .extra1 = &minolduid, |
758 | .extra2 = &maxolduid, | |
759 | }, | |
760 | { | |
1da177e4 LT |
761 | .procname = "overflowgid", |
762 | .data = &overflowgid, | |
763 | .maxlen = sizeof(int), | |
764 | .mode = 0644, | |
6d456111 | 765 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
766 | .extra1 = &minolduid, |
767 | .extra2 = &maxolduid, | |
768 | }, | |
347a8dc3 | 769 | #ifdef CONFIG_S390 |
1da177e4 LT |
770 | #ifdef CONFIG_MATHEMU |
771 | { | |
1da177e4 LT |
772 | .procname = "ieee_emulation_warnings", |
773 | .data = &sysctl_ieee_emulation_warnings, | |
774 | .maxlen = sizeof(int), | |
775 | .mode = 0644, | |
6d456111 | 776 | .proc_handler = proc_dointvec, |
1da177e4 | 777 | }, |
1da177e4 LT |
778 | #endif |
779 | { | |
1da177e4 | 780 | .procname = "userprocess_debug", |
ab3c68ee | 781 | .data = &show_unhandled_signals, |
1da177e4 LT |
782 | .maxlen = sizeof(int), |
783 | .mode = 0644, | |
6d456111 | 784 | .proc_handler = proc_dointvec, |
1da177e4 LT |
785 | }, |
786 | #endif | |
787 | { | |
1da177e4 LT |
788 | .procname = "pid_max", |
789 | .data = &pid_max, | |
790 | .maxlen = sizeof (int), | |
791 | .mode = 0644, | |
6d456111 | 792 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
793 | .extra1 = &pid_max_min, |
794 | .extra2 = &pid_max_max, | |
795 | }, | |
796 | { | |
1da177e4 LT |
797 | .procname = "panic_on_oops", |
798 | .data = &panic_on_oops, | |
799 | .maxlen = sizeof(int), | |
800 | .mode = 0644, | |
6d456111 | 801 | .proc_handler = proc_dointvec, |
1da177e4 | 802 | }, |
7ef3d2fd JP |
803 | #if defined CONFIG_PRINTK |
804 | { | |
7ef3d2fd JP |
805 | .procname = "printk", |
806 | .data = &console_loglevel, | |
807 | .maxlen = 4*sizeof(int), | |
808 | .mode = 0644, | |
6d456111 | 809 | .proc_handler = proc_dointvec, |
7ef3d2fd | 810 | }, |
1da177e4 | 811 | { |
1da177e4 | 812 | .procname = "printk_ratelimit", |
717115e1 | 813 | .data = &printk_ratelimit_state.interval, |
1da177e4 LT |
814 | .maxlen = sizeof(int), |
815 | .mode = 0644, | |
6d456111 | 816 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
817 | }, |
818 | { | |
1da177e4 | 819 | .procname = "printk_ratelimit_burst", |
717115e1 | 820 | .data = &printk_ratelimit_state.burst, |
1da177e4 LT |
821 | .maxlen = sizeof(int), |
822 | .mode = 0644, | |
6d456111 | 823 | .proc_handler = proc_dointvec, |
1da177e4 | 824 | }, |
af91322e | 825 | { |
af91322e DY |
826 | .procname = "printk_delay", |
827 | .data = &printk_delay_msec, | |
828 | .maxlen = sizeof(int), | |
829 | .mode = 0644, | |
6d456111 | 830 | .proc_handler = proc_dointvec_minmax, |
af91322e DY |
831 | .extra1 = &zero, |
832 | .extra2 = &ten_thousand, | |
833 | }, | |
750afe7b BP |
834 | { |
835 | .procname = "printk_devkmsg", | |
836 | .data = devkmsg_log_str, | |
837 | .maxlen = DEVKMSG_STR_MAX_SIZE, | |
838 | .mode = 0644, | |
839 | .proc_handler = devkmsg_sysctl_set_loglvl, | |
840 | }, | |
eaf06b24 DR |
841 | { |
842 | .procname = "dmesg_restrict", | |
843 | .data = &dmesg_restrict, | |
844 | .maxlen = sizeof(int), | |
845 | .mode = 0644, | |
620f6e8e | 846 | .proc_handler = proc_dointvec_minmax_sysadmin, |
eaf06b24 DR |
847 | .extra1 = &zero, |
848 | .extra2 = &one, | |
849 | }, | |
455cd5ab DR |
850 | { |
851 | .procname = "kptr_restrict", | |
852 | .data = &kptr_restrict, | |
853 | .maxlen = sizeof(int), | |
854 | .mode = 0644, | |
620f6e8e | 855 | .proc_handler = proc_dointvec_minmax_sysadmin, |
455cd5ab DR |
856 | .extra1 = &zero, |
857 | .extra2 = &two, | |
858 | }, | |
df6e61d4 | 859 | #endif |
1da177e4 | 860 | { |
1da177e4 LT |
861 | .procname = "ngroups_max", |
862 | .data = &ngroups_max, | |
863 | .maxlen = sizeof (int), | |
864 | .mode = 0444, | |
6d456111 | 865 | .proc_handler = proc_dointvec, |
1da177e4 | 866 | }, |
73efc039 DB |
867 | { |
868 | .procname = "cap_last_cap", | |
869 | .data = (void *)&cap_last_cap, | |
870 | .maxlen = sizeof(int), | |
871 | .mode = 0444, | |
872 | .proc_handler = proc_dointvec, | |
873 | }, | |
58687acb | 874 | #if defined(CONFIG_LOCKUP_DETECTOR) |
504d7cf1 | 875 | { |
58687acb | 876 | .procname = "watchdog", |
7feeb9cd TG |
877 | .data = &watchdog_user_enabled, |
878 | .maxlen = sizeof(int), | |
879 | .mode = 0644, | |
195daf66 | 880 | .proc_handler = proc_watchdog, |
586692a5 MSB |
881 | .extra1 = &zero, |
882 | .extra2 = &one, | |
58687acb DZ |
883 | }, |
884 | { | |
885 | .procname = "watchdog_thresh", | |
586692a5 | 886 | .data = &watchdog_thresh, |
58687acb DZ |
887 | .maxlen = sizeof(int), |
888 | .mode = 0644, | |
195daf66 | 889 | .proc_handler = proc_watchdog_thresh, |
a6572f84 | 890 | .extra1 = &zero, |
58687acb | 891 | .extra2 = &sixty, |
504d7cf1 | 892 | }, |
195daf66 UO |
893 | { |
894 | .procname = "nmi_watchdog", | |
7feeb9cd TG |
895 | .data = &nmi_watchdog_user_enabled, |
896 | .maxlen = sizeof(int), | |
51d4052b | 897 | .mode = NMI_WATCHDOG_SYSCTL_PERM, |
195daf66 UO |
898 | .proc_handler = proc_nmi_watchdog, |
899 | .extra1 = &zero, | |
195daf66 | 900 | .extra2 = &one, |
195daf66 | 901 | }, |
05a4a952 NP |
902 | { |
903 | .procname = "watchdog_cpumask", | |
904 | .data = &watchdog_cpumask_bits, | |
905 | .maxlen = NR_CPUS, | |
906 | .mode = 0644, | |
907 | .proc_handler = proc_watchdog_cpumask, | |
908 | }, | |
909 | #ifdef CONFIG_SOFTLOCKUP_DETECTOR | |
195daf66 UO |
910 | { |
911 | .procname = "soft_watchdog", | |
7feeb9cd TG |
912 | .data = &soft_watchdog_user_enabled, |
913 | .maxlen = sizeof(int), | |
914 | .mode = 0644, | |
195daf66 UO |
915 | .proc_handler = proc_soft_watchdog, |
916 | .extra1 = &zero, | |
917 | .extra2 = &one, | |
918 | }, | |
2508ce18 DZ |
919 | { |
920 | .procname = "softlockup_panic", | |
921 | .data = &softlockup_panic, | |
922 | .maxlen = sizeof(int), | |
923 | .mode = 0644, | |
924 | .proc_handler = proc_dointvec_minmax, | |
925 | .extra1 = &zero, | |
926 | .extra2 = &one, | |
927 | }, | |
05a4a952 | 928 | #ifdef CONFIG_SMP |
ac1f5912 | 929 | { |
05a4a952 NP |
930 | .procname = "softlockup_all_cpu_backtrace", |
931 | .data = &sysctl_softlockup_all_cpu_backtrace, | |
ac1f5912 DZ |
932 | .maxlen = sizeof(int), |
933 | .mode = 0644, | |
934 | .proc_handler = proc_dointvec_minmax, | |
935 | .extra1 = &zero, | |
936 | .extra2 = &one, | |
937 | }, | |
05a4a952 | 938 | #endif /* CONFIG_SMP */ |
ac1f5912 | 939 | #endif |
05a4a952 | 940 | #ifdef CONFIG_HARDLOCKUP_DETECTOR |
ed235875 | 941 | { |
05a4a952 NP |
942 | .procname = "hardlockup_panic", |
943 | .data = &hardlockup_panic, | |
ed235875 AT |
944 | .maxlen = sizeof(int), |
945 | .mode = 0644, | |
946 | .proc_handler = proc_dointvec_minmax, | |
947 | .extra1 = &zero, | |
948 | .extra2 = &one, | |
949 | }, | |
05a4a952 | 950 | #ifdef CONFIG_SMP |
55537871 JK |
951 | { |
952 | .procname = "hardlockup_all_cpu_backtrace", | |
953 | .data = &sysctl_hardlockup_all_cpu_backtrace, | |
954 | .maxlen = sizeof(int), | |
955 | .mode = 0644, | |
956 | .proc_handler = proc_dointvec_minmax, | |
957 | .extra1 = &zero, | |
958 | .extra2 = &one, | |
959 | }, | |
ed235875 | 960 | #endif /* CONFIG_SMP */ |
5dc30558 | 961 | #endif |
05a4a952 NP |
962 | #endif |
963 | ||
5dc30558 DZ |
964 | #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) |
965 | { | |
966 | .procname = "unknown_nmi_panic", | |
967 | .data = &unknown_nmi_panic, | |
968 | .maxlen = sizeof (int), | |
969 | .mode = 0644, | |
970 | .proc_handler = proc_dointvec, | |
971 | }, | |
504d7cf1 | 972 | #endif |
1da177e4 | 973 | #if defined(CONFIG_X86) |
8da5adda | 974 | { |
8da5adda DZ |
975 | .procname = "panic_on_unrecovered_nmi", |
976 | .data = &panic_on_unrecovered_nmi, | |
977 | .maxlen = sizeof(int), | |
978 | .mode = 0644, | |
6d456111 | 979 | .proc_handler = proc_dointvec, |
8da5adda | 980 | }, |
5211a242 | 981 | { |
5211a242 KG |
982 | .procname = "panic_on_io_nmi", |
983 | .data = &panic_on_io_nmi, | |
984 | .maxlen = sizeof(int), | |
985 | .mode = 0644, | |
6d456111 | 986 | .proc_handler = proc_dointvec, |
5211a242 | 987 | }, |
55af7796 MH |
988 | #ifdef CONFIG_DEBUG_STACKOVERFLOW |
989 | { | |
990 | .procname = "panic_on_stackoverflow", | |
991 | .data = &sysctl_panic_on_stackoverflow, | |
992 | .maxlen = sizeof(int), | |
993 | .mode = 0644, | |
994 | .proc_handler = proc_dointvec, | |
995 | }, | |
996 | #endif | |
1da177e4 | 997 | { |
1da177e4 LT |
998 | .procname = "bootloader_type", |
999 | .data = &bootloader_type, | |
1000 | .maxlen = sizeof (int), | |
1001 | .mode = 0444, | |
6d456111 | 1002 | .proc_handler = proc_dointvec, |
1da177e4 | 1003 | }, |
5031296c | 1004 | { |
5031296c PA |
1005 | .procname = "bootloader_version", |
1006 | .data = &bootloader_version, | |
1007 | .maxlen = sizeof (int), | |
1008 | .mode = 0444, | |
6d456111 | 1009 | .proc_handler = proc_dointvec, |
5031296c | 1010 | }, |
6e7c4025 | 1011 | { |
6e7c4025 IM |
1012 | .procname = "io_delay_type", |
1013 | .data = &io_delay_type, | |
1014 | .maxlen = sizeof(int), | |
1015 | .mode = 0644, | |
6d456111 | 1016 | .proc_handler = proc_dointvec, |
6e7c4025 | 1017 | }, |
1da177e4 | 1018 | #endif |
7a9166e3 | 1019 | #if defined(CONFIG_MMU) |
1da177e4 | 1020 | { |
1da177e4 LT |
1021 | .procname = "randomize_va_space", |
1022 | .data = &randomize_va_space, | |
1023 | .maxlen = sizeof(int), | |
1024 | .mode = 0644, | |
6d456111 | 1025 | .proc_handler = proc_dointvec, |
1da177e4 | 1026 | }, |
7a9166e3 | 1027 | #endif |
0152fb37 | 1028 | #if defined(CONFIG_S390) && defined(CONFIG_SMP) |
951f22d5 | 1029 | { |
951f22d5 MS |
1030 | .procname = "spin_retry", |
1031 | .data = &spin_retry, | |
1032 | .maxlen = sizeof (int), | |
1033 | .mode = 0644, | |
6d456111 | 1034 | .proc_handler = proc_dointvec, |
951f22d5 | 1035 | }, |
c255d844 | 1036 | #endif |
673d5b43 | 1037 | #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) |
c255d844 | 1038 | { |
c255d844 | 1039 | .procname = "acpi_video_flags", |
77afcf78 | 1040 | .data = &acpi_realmode_flags, |
c255d844 PM |
1041 | .maxlen = sizeof (unsigned long), |
1042 | .mode = 0644, | |
6d456111 | 1043 | .proc_handler = proc_doulongvec_minmax, |
c255d844 | 1044 | }, |
d2b176ed | 1045 | #endif |
b6fca725 | 1046 | #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN |
d2b176ed | 1047 | { |
d2b176ed JS |
1048 | .procname = "ignore-unaligned-usertrap", |
1049 | .data = &no_unaligned_warning, | |
1050 | .maxlen = sizeof (int), | |
1051 | .mode = 0644, | |
6d456111 | 1052 | .proc_handler = proc_dointvec, |
d2b176ed | 1053 | }, |
b6fca725 VG |
1054 | #endif |
1055 | #ifdef CONFIG_IA64 | |
88fc241f | 1056 | { |
88fc241f DC |
1057 | .procname = "unaligned-dump-stack", |
1058 | .data = &unaligned_dump_stack, | |
1059 | .maxlen = sizeof (int), | |
1060 | .mode = 0644, | |
6d456111 | 1061 | .proc_handler = proc_dointvec, |
88fc241f | 1062 | }, |
bebfa101 | 1063 | #endif |
e162b39a MSB |
1064 | #ifdef CONFIG_DETECT_HUNG_TASK |
1065 | { | |
e162b39a MSB |
1066 | .procname = "hung_task_panic", |
1067 | .data = &sysctl_hung_task_panic, | |
1068 | .maxlen = sizeof(int), | |
1069 | .mode = 0644, | |
6d456111 | 1070 | .proc_handler = proc_dointvec_minmax, |
e162b39a MSB |
1071 | .extra1 = &zero, |
1072 | .extra2 = &one, | |
1073 | }, | |
82a1fcb9 | 1074 | { |
82a1fcb9 IM |
1075 | .procname = "hung_task_check_count", |
1076 | .data = &sysctl_hung_task_check_count, | |
cd64647f | 1077 | .maxlen = sizeof(int), |
82a1fcb9 | 1078 | .mode = 0644, |
cd64647f LZ |
1079 | .proc_handler = proc_dointvec_minmax, |
1080 | .extra1 = &zero, | |
82a1fcb9 IM |
1081 | }, |
1082 | { | |
82a1fcb9 IM |
1083 | .procname = "hung_task_timeout_secs", |
1084 | .data = &sysctl_hung_task_timeout_secs, | |
90739081 | 1085 | .maxlen = sizeof(unsigned long), |
82a1fcb9 | 1086 | .mode = 0644, |
6d456111 | 1087 | .proc_handler = proc_dohung_task_timeout_secs, |
80df2847 | 1088 | .extra2 = &hung_task_timeout_max, |
82a1fcb9 IM |
1089 | }, |
1090 | { | |
82a1fcb9 IM |
1091 | .procname = "hung_task_warnings", |
1092 | .data = &sysctl_hung_task_warnings, | |
270750db | 1093 | .maxlen = sizeof(int), |
82a1fcb9 | 1094 | .mode = 0644, |
270750db AT |
1095 | .proc_handler = proc_dointvec_minmax, |
1096 | .extra1 = &neg_one, | |
82a1fcb9 | 1097 | }, |
c4f3b63f | 1098 | #endif |
23f78d4a IM |
1099 | #ifdef CONFIG_RT_MUTEXES |
1100 | { | |
23f78d4a IM |
1101 | .procname = "max_lock_depth", |
1102 | .data = &max_lock_depth, | |
1103 | .maxlen = sizeof(int), | |
1104 | .mode = 0644, | |
6d456111 | 1105 | .proc_handler = proc_dointvec, |
23f78d4a | 1106 | }, |
5096add8 | 1107 | #endif |
10a0a8d4 | 1108 | { |
10a0a8d4 JF |
1109 | .procname = "poweroff_cmd", |
1110 | .data = &poweroff_cmd, | |
1111 | .maxlen = POWEROFF_CMD_PATH_LEN, | |
1112 | .mode = 0644, | |
6d456111 | 1113 | .proc_handler = proc_dostring, |
10a0a8d4 | 1114 | }, |
0b77f5bf DH |
1115 | #ifdef CONFIG_KEYS |
1116 | { | |
0b77f5bf DH |
1117 | .procname = "keys", |
1118 | .mode = 0555, | |
1119 | .child = key_sysctls, | |
1120 | }, | |
1121 | #endif | |
cdd6c482 | 1122 | #ifdef CONFIG_PERF_EVENTS |
aa4a2218 VW |
1123 | /* |
1124 | * User-space scripts rely on the existence of this file | |
1125 | * as a feature check for perf_events being enabled. | |
1126 | * | |
1127 | * So it's an ABI, do not remove! | |
1128 | */ | |
1ccd1549 | 1129 | { |
cdd6c482 IM |
1130 | .procname = "perf_event_paranoid", |
1131 | .data = &sysctl_perf_event_paranoid, | |
1132 | .maxlen = sizeof(sysctl_perf_event_paranoid), | |
1ccd1549 | 1133 | .mode = 0644, |
6d456111 | 1134 | .proc_handler = proc_dointvec, |
1ccd1549 | 1135 | }, |
c5078f78 | 1136 | { |
cdd6c482 IM |
1137 | .procname = "perf_event_mlock_kb", |
1138 | .data = &sysctl_perf_event_mlock, | |
1139 | .maxlen = sizeof(sysctl_perf_event_mlock), | |
c5078f78 | 1140 | .mode = 0644, |
6d456111 | 1141 | .proc_handler = proc_dointvec, |
c5078f78 | 1142 | }, |
a78ac325 | 1143 | { |
cdd6c482 IM |
1144 | .procname = "perf_event_max_sample_rate", |
1145 | .data = &sysctl_perf_event_sample_rate, | |
1146 | .maxlen = sizeof(sysctl_perf_event_sample_rate), | |
a78ac325 | 1147 | .mode = 0644, |
163ec435 | 1148 | .proc_handler = perf_proc_update_handler, |
723478c8 | 1149 | .extra1 = &one, |
a78ac325 | 1150 | }, |
14c63f17 DH |
1151 | { |
1152 | .procname = "perf_cpu_time_max_percent", | |
1153 | .data = &sysctl_perf_cpu_time_max_percent, | |
1154 | .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), | |
1155 | .mode = 0644, | |
1156 | .proc_handler = perf_cpu_time_max_percent_handler, | |
1157 | .extra1 = &zero, | |
1158 | .extra2 = &one_hundred, | |
1159 | }, | |
c5dfd78e ACM |
1160 | { |
1161 | .procname = "perf_event_max_stack", | |
a831100a | 1162 | .data = &sysctl_perf_event_max_stack, |
c5dfd78e ACM |
1163 | .maxlen = sizeof(sysctl_perf_event_max_stack), |
1164 | .mode = 0644, | |
1165 | .proc_handler = perf_event_max_stack_handler, | |
1166 | .extra1 = &zero, | |
1167 | .extra2 = &six_hundred_forty_kb, | |
1168 | }, | |
c85b0334 ACM |
1169 | { |
1170 | .procname = "perf_event_max_contexts_per_stack", | |
1171 | .data = &sysctl_perf_event_max_contexts_per_stack, | |
1172 | .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack), | |
1173 | .mode = 0644, | |
1174 | .proc_handler = perf_event_max_stack_handler, | |
1175 | .extra1 = &zero, | |
1176 | .extra2 = &one_thousand, | |
1177 | }, | |
cb684b5b | 1178 | #endif |
9e3961a0 PB |
1179 | { |
1180 | .procname = "panic_on_warn", | |
1181 | .data = &panic_on_warn, | |
1182 | .maxlen = sizeof(int), | |
1183 | .mode = 0644, | |
1184 | .proc_handler = proc_dointvec_minmax, | |
1185 | .extra1 = &zero, | |
1186 | .extra2 = &one, | |
1187 | }, | |
bc7a34b8 TG |
1188 | #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) |
1189 | { | |
1190 | .procname = "timer_migration", | |
1191 | .data = &sysctl_timer_migration, | |
1192 | .maxlen = sizeof(unsigned int), | |
1193 | .mode = 0644, | |
1194 | .proc_handler = timer_migration_handler, | |
b94bf594 MJ |
1195 | .extra1 = &zero, |
1196 | .extra2 = &one, | |
bc7a34b8 | 1197 | }, |
1be7f75d AS |
1198 | #endif |
1199 | #ifdef CONFIG_BPF_SYSCALL | |
1200 | { | |
1201 | .procname = "unprivileged_bpf_disabled", | |
1202 | .data = &sysctl_unprivileged_bpf_disabled, | |
1203 | .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), | |
1204 | .mode = 0644, | |
1205 | /* only handle a transition from default "0" to "1" */ | |
1206 | .proc_handler = proc_dointvec_minmax, | |
1207 | .extra1 = &one, | |
1208 | .extra2 = &one, | |
1209 | }, | |
088e9d25 DBO |
1210 | #endif |
1211 | #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) | |
1212 | { | |
1213 | .procname = "panic_on_rcu_stall", | |
1214 | .data = &sysctl_panic_on_rcu_stall, | |
1215 | .maxlen = sizeof(sysctl_panic_on_rcu_stall), | |
1216 | .mode = 0644, | |
1217 | .proc_handler = proc_dointvec_minmax, | |
1218 | .extra1 = &zero, | |
1219 | .extra2 = &one, | |
1220 | }, | |
bc7a34b8 | 1221 | #endif |
6fce56ec | 1222 | { } |
1da177e4 LT |
1223 | }; |
1224 | ||
d8217f07 | 1225 | static struct ctl_table vm_table[] = { |
1da177e4 | 1226 | { |
1da177e4 LT |
1227 | .procname = "overcommit_memory", |
1228 | .data = &sysctl_overcommit_memory, | |
1229 | .maxlen = sizeof(sysctl_overcommit_memory), | |
1230 | .mode = 0644, | |
cb16e95f PH |
1231 | .proc_handler = proc_dointvec_minmax, |
1232 | .extra1 = &zero, | |
1233 | .extra2 = &two, | |
1da177e4 | 1234 | }, |
fadd8fbd | 1235 | { |
fadd8fbd KH |
1236 | .procname = "panic_on_oom", |
1237 | .data = &sysctl_panic_on_oom, | |
1238 | .maxlen = sizeof(sysctl_panic_on_oom), | |
1239 | .mode = 0644, | |
cb16e95f PH |
1240 | .proc_handler = proc_dointvec_minmax, |
1241 | .extra1 = &zero, | |
1242 | .extra2 = &two, | |
fadd8fbd | 1243 | }, |
fe071d7e | 1244 | { |
fe071d7e DR |
1245 | .procname = "oom_kill_allocating_task", |
1246 | .data = &sysctl_oom_kill_allocating_task, | |
1247 | .maxlen = sizeof(sysctl_oom_kill_allocating_task), | |
1248 | .mode = 0644, | |
6d456111 | 1249 | .proc_handler = proc_dointvec, |
fe071d7e | 1250 | }, |
fef1bdd6 | 1251 | { |
fef1bdd6 DR |
1252 | .procname = "oom_dump_tasks", |
1253 | .data = &sysctl_oom_dump_tasks, | |
1254 | .maxlen = sizeof(sysctl_oom_dump_tasks), | |
1255 | .mode = 0644, | |
6d456111 | 1256 | .proc_handler = proc_dointvec, |
fef1bdd6 | 1257 | }, |
1da177e4 | 1258 | { |
1da177e4 LT |
1259 | .procname = "overcommit_ratio", |
1260 | .data = &sysctl_overcommit_ratio, | |
1261 | .maxlen = sizeof(sysctl_overcommit_ratio), | |
1262 | .mode = 0644, | |
49f0ce5f JM |
1263 | .proc_handler = overcommit_ratio_handler, |
1264 | }, | |
1265 | { | |
1266 | .procname = "overcommit_kbytes", | |
1267 | .data = &sysctl_overcommit_kbytes, | |
1268 | .maxlen = sizeof(sysctl_overcommit_kbytes), | |
1269 | .mode = 0644, | |
1270 | .proc_handler = overcommit_kbytes_handler, | |
1da177e4 LT |
1271 | }, |
1272 | { | |
1da177e4 LT |
1273 | .procname = "page-cluster", |
1274 | .data = &page_cluster, | |
1275 | .maxlen = sizeof(int), | |
1276 | .mode = 0644, | |
cb16e95f PH |
1277 | .proc_handler = proc_dointvec_minmax, |
1278 | .extra1 = &zero, | |
1da177e4 LT |
1279 | }, |
1280 | { | |
1da177e4 LT |
1281 | .procname = "dirty_background_ratio", |
1282 | .data = &dirty_background_ratio, | |
1283 | .maxlen = sizeof(dirty_background_ratio), | |
1284 | .mode = 0644, | |
6d456111 | 1285 | .proc_handler = dirty_background_ratio_handler, |
1da177e4 LT |
1286 | .extra1 = &zero, |
1287 | .extra2 = &one_hundred, | |
1288 | }, | |
2da02997 | 1289 | { |
2da02997 DR |
1290 | .procname = "dirty_background_bytes", |
1291 | .data = &dirty_background_bytes, | |
1292 | .maxlen = sizeof(dirty_background_bytes), | |
1293 | .mode = 0644, | |
6d456111 | 1294 | .proc_handler = dirty_background_bytes_handler, |
fc3501d4 | 1295 | .extra1 = &one_ul, |
2da02997 | 1296 | }, |
1da177e4 | 1297 | { |
1da177e4 LT |
1298 | .procname = "dirty_ratio", |
1299 | .data = &vm_dirty_ratio, | |
1300 | .maxlen = sizeof(vm_dirty_ratio), | |
1301 | .mode = 0644, | |
6d456111 | 1302 | .proc_handler = dirty_ratio_handler, |
1da177e4 LT |
1303 | .extra1 = &zero, |
1304 | .extra2 = &one_hundred, | |
1305 | }, | |
2da02997 | 1306 | { |
2da02997 DR |
1307 | .procname = "dirty_bytes", |
1308 | .data = &vm_dirty_bytes, | |
1309 | .maxlen = sizeof(vm_dirty_bytes), | |
1310 | .mode = 0644, | |
6d456111 | 1311 | .proc_handler = dirty_bytes_handler, |
9e4a5bda | 1312 | .extra1 = &dirty_bytes_min, |
2da02997 | 1313 | }, |
1da177e4 | 1314 | { |
1da177e4 | 1315 | .procname = "dirty_writeback_centisecs", |
f6ef9438 BS |
1316 | .data = &dirty_writeback_interval, |
1317 | .maxlen = sizeof(dirty_writeback_interval), | |
1da177e4 | 1318 | .mode = 0644, |
6d456111 | 1319 | .proc_handler = dirty_writeback_centisecs_handler, |
1da177e4 LT |
1320 | }, |
1321 | { | |
1da177e4 | 1322 | .procname = "dirty_expire_centisecs", |
f6ef9438 BS |
1323 | .data = &dirty_expire_interval, |
1324 | .maxlen = sizeof(dirty_expire_interval), | |
1da177e4 | 1325 | .mode = 0644, |
cb16e95f PH |
1326 | .proc_handler = proc_dointvec_minmax, |
1327 | .extra1 = &zero, | |
1da177e4 | 1328 | }, |
1efff914 TT |
1329 | { |
1330 | .procname = "dirtytime_expire_seconds", | |
1331 | .data = &dirtytime_expire_interval, | |
1332 | .maxlen = sizeof(dirty_expire_interval), | |
1333 | .mode = 0644, | |
1334 | .proc_handler = dirtytime_interval_handler, | |
1335 | .extra1 = &zero, | |
1336 | }, | |
1da177e4 | 1337 | { |
1da177e4 LT |
1338 | .procname = "swappiness", |
1339 | .data = &vm_swappiness, | |
1340 | .maxlen = sizeof(vm_swappiness), | |
1341 | .mode = 0644, | |
6d456111 | 1342 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1343 | .extra1 = &zero, |
1344 | .extra2 = &one_hundred, | |
1345 | }, | |
1346 | #ifdef CONFIG_HUGETLB_PAGE | |
06808b08 | 1347 | { |
1da177e4 | 1348 | .procname = "nr_hugepages", |
e5ff2159 | 1349 | .data = NULL, |
1da177e4 LT |
1350 | .maxlen = sizeof(unsigned long), |
1351 | .mode = 0644, | |
6d456111 | 1352 | .proc_handler = hugetlb_sysctl_handler, |
06808b08 LS |
1353 | }, |
1354 | #ifdef CONFIG_NUMA | |
1355 | { | |
1356 | .procname = "nr_hugepages_mempolicy", | |
1357 | .data = NULL, | |
1358 | .maxlen = sizeof(unsigned long), | |
1359 | .mode = 0644, | |
1360 | .proc_handler = &hugetlb_mempolicy_sysctl_handler, | |
06808b08 | 1361 | }, |
4518085e KW |
1362 | { |
1363 | .procname = "numa_stat", | |
1364 | .data = &sysctl_vm_numa_stat, | |
1365 | .maxlen = sizeof(int), | |
1366 | .mode = 0644, | |
1367 | .proc_handler = sysctl_vm_numa_stat_handler, | |
1368 | .extra1 = &zero, | |
1369 | .extra2 = &one, | |
1370 | }, | |
06808b08 | 1371 | #endif |
1da177e4 | 1372 | { |
1da177e4 LT |
1373 | .procname = "hugetlb_shm_group", |
1374 | .data = &sysctl_hugetlb_shm_group, | |
1375 | .maxlen = sizeof(gid_t), | |
1376 | .mode = 0644, | |
6d456111 | 1377 | .proc_handler = proc_dointvec, |
1da177e4 | 1378 | }, |
d1c3fb1f | 1379 | { |
d1c3fb1f | 1380 | .procname = "nr_overcommit_hugepages", |
e5ff2159 AK |
1381 | .data = NULL, |
1382 | .maxlen = sizeof(unsigned long), | |
d1c3fb1f | 1383 | .mode = 0644, |
6d456111 | 1384 | .proc_handler = hugetlb_overcommit_handler, |
d1c3fb1f | 1385 | }, |
1da177e4 LT |
1386 | #endif |
1387 | { | |
1da177e4 LT |
1388 | .procname = "lowmem_reserve_ratio", |
1389 | .data = &sysctl_lowmem_reserve_ratio, | |
1390 | .maxlen = sizeof(sysctl_lowmem_reserve_ratio), | |
1391 | .mode = 0644, | |
6d456111 | 1392 | .proc_handler = lowmem_reserve_ratio_sysctl_handler, |
1da177e4 | 1393 | }, |
9d0243bc | 1394 | { |
9d0243bc AM |
1395 | .procname = "drop_caches", |
1396 | .data = &sysctl_drop_caches, | |
1397 | .maxlen = sizeof(int), | |
1398 | .mode = 0644, | |
1399 | .proc_handler = drop_caches_sysctl_handler, | |
cb16e95f | 1400 | .extra1 = &one, |
5509a5d2 | 1401 | .extra2 = &four, |
9d0243bc | 1402 | }, |
76ab0f53 MG |
1403 | #ifdef CONFIG_COMPACTION |
1404 | { | |
1405 | .procname = "compact_memory", | |
1406 | .data = &sysctl_compact_memory, | |
1407 | .maxlen = sizeof(int), | |
1408 | .mode = 0200, | |
1409 | .proc_handler = sysctl_compaction_handler, | |
1410 | }, | |
5e771905 MG |
1411 | { |
1412 | .procname = "extfrag_threshold", | |
1413 | .data = &sysctl_extfrag_threshold, | |
1414 | .maxlen = sizeof(int), | |
1415 | .mode = 0644, | |
1416 | .proc_handler = sysctl_extfrag_handler, | |
1417 | .extra1 = &min_extfrag_threshold, | |
1418 | .extra2 = &max_extfrag_threshold, | |
1419 | }, | |
5bbe3547 EM |
1420 | { |
1421 | .procname = "compact_unevictable_allowed", | |
1422 | .data = &sysctl_compact_unevictable_allowed, | |
1423 | .maxlen = sizeof(int), | |
1424 | .mode = 0644, | |
1425 | .proc_handler = proc_dointvec, | |
1426 | .extra1 = &zero, | |
1427 | .extra2 = &one, | |
1428 | }, | |
5e771905 | 1429 | |
76ab0f53 | 1430 | #endif /* CONFIG_COMPACTION */ |
1da177e4 | 1431 | { |
1da177e4 LT |
1432 | .procname = "min_free_kbytes", |
1433 | .data = &min_free_kbytes, | |
1434 | .maxlen = sizeof(min_free_kbytes), | |
1435 | .mode = 0644, | |
6d456111 | 1436 | .proc_handler = min_free_kbytes_sysctl_handler, |
1da177e4 LT |
1437 | .extra1 = &zero, |
1438 | }, | |
795ae7a0 JW |
1439 | { |
1440 | .procname = "watermark_scale_factor", | |
1441 | .data = &watermark_scale_factor, | |
1442 | .maxlen = sizeof(watermark_scale_factor), | |
1443 | .mode = 0644, | |
1444 | .proc_handler = watermark_scale_factor_sysctl_handler, | |
1445 | .extra1 = &one, | |
1446 | .extra2 = &one_thousand, | |
1447 | }, | |
8ad4b1fb | 1448 | { |
8ad4b1fb RS |
1449 | .procname = "percpu_pagelist_fraction", |
1450 | .data = &percpu_pagelist_fraction, | |
1451 | .maxlen = sizeof(percpu_pagelist_fraction), | |
1452 | .mode = 0644, | |
6d456111 | 1453 | .proc_handler = percpu_pagelist_fraction_sysctl_handler, |
7cd2b0a3 | 1454 | .extra1 = &zero, |
8ad4b1fb | 1455 | }, |
1da177e4 LT |
1456 | #ifdef CONFIG_MMU |
1457 | { | |
1da177e4 LT |
1458 | .procname = "max_map_count", |
1459 | .data = &sysctl_max_map_count, | |
1460 | .maxlen = sizeof(sysctl_max_map_count), | |
1461 | .mode = 0644, | |
3e26120c | 1462 | .proc_handler = proc_dointvec_minmax, |
70da2340 | 1463 | .extra1 = &zero, |
1da177e4 | 1464 | }, |
dd8632a1 PM |
1465 | #else |
1466 | { | |
dd8632a1 PM |
1467 | .procname = "nr_trim_pages", |
1468 | .data = &sysctl_nr_trim_pages, | |
1469 | .maxlen = sizeof(sysctl_nr_trim_pages), | |
1470 | .mode = 0644, | |
6d456111 | 1471 | .proc_handler = proc_dointvec_minmax, |
dd8632a1 PM |
1472 | .extra1 = &zero, |
1473 | }, | |
1da177e4 LT |
1474 | #endif |
1475 | { | |
1da177e4 LT |
1476 | .procname = "laptop_mode", |
1477 | .data = &laptop_mode, | |
1478 | .maxlen = sizeof(laptop_mode), | |
1479 | .mode = 0644, | |
6d456111 | 1480 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
1481 | }, |
1482 | { | |
1da177e4 LT |
1483 | .procname = "block_dump", |
1484 | .data = &block_dump, | |
1485 | .maxlen = sizeof(block_dump), | |
1486 | .mode = 0644, | |
6d456111 | 1487 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1488 | .extra1 = &zero, |
1489 | }, | |
1490 | { | |
1da177e4 LT |
1491 | .procname = "vfs_cache_pressure", |
1492 | .data = &sysctl_vfs_cache_pressure, | |
1493 | .maxlen = sizeof(sysctl_vfs_cache_pressure), | |
1494 | .mode = 0644, | |
6d456111 | 1495 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1496 | .extra1 = &zero, |
1497 | }, | |
1498 | #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT | |
1499 | { | |
1da177e4 LT |
1500 | .procname = "legacy_va_layout", |
1501 | .data = &sysctl_legacy_va_layout, | |
1502 | .maxlen = sizeof(sysctl_legacy_va_layout), | |
1503 | .mode = 0644, | |
6d456111 | 1504 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1505 | .extra1 = &zero, |
1506 | }, | |
1507 | #endif | |
1743660b CL |
1508 | #ifdef CONFIG_NUMA |
1509 | { | |
1743660b | 1510 | .procname = "zone_reclaim_mode", |
a5f5f91d MG |
1511 | .data = &node_reclaim_mode, |
1512 | .maxlen = sizeof(node_reclaim_mode), | |
1743660b | 1513 | .mode = 0644, |
6d456111 | 1514 | .proc_handler = proc_dointvec, |
c84db23c | 1515 | .extra1 = &zero, |
1743660b | 1516 | }, |
9614634f | 1517 | { |
9614634f CL |
1518 | .procname = "min_unmapped_ratio", |
1519 | .data = &sysctl_min_unmapped_ratio, | |
1520 | .maxlen = sizeof(sysctl_min_unmapped_ratio), | |
1521 | .mode = 0644, | |
6d456111 | 1522 | .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, |
9614634f CL |
1523 | .extra1 = &zero, |
1524 | .extra2 = &one_hundred, | |
1525 | }, | |
0ff38490 | 1526 | { |
0ff38490 CL |
1527 | .procname = "min_slab_ratio", |
1528 | .data = &sysctl_min_slab_ratio, | |
1529 | .maxlen = sizeof(sysctl_min_slab_ratio), | |
1530 | .mode = 0644, | |
6d456111 | 1531 | .proc_handler = sysctl_min_slab_ratio_sysctl_handler, |
0ff38490 CL |
1532 | .extra1 = &zero, |
1533 | .extra2 = &one_hundred, | |
1534 | }, | |
e6e5494c | 1535 | #endif |
77461ab3 CL |
1536 | #ifdef CONFIG_SMP |
1537 | { | |
77461ab3 CL |
1538 | .procname = "stat_interval", |
1539 | .data = &sysctl_stat_interval, | |
1540 | .maxlen = sizeof(sysctl_stat_interval), | |
1541 | .mode = 0644, | |
6d456111 | 1542 | .proc_handler = proc_dointvec_jiffies, |
77461ab3 | 1543 | }, |
52b6f46b HD |
1544 | { |
1545 | .procname = "stat_refresh", | |
1546 | .data = NULL, | |
1547 | .maxlen = 0, | |
1548 | .mode = 0600, | |
1549 | .proc_handler = vmstat_refresh, | |
1550 | }, | |
77461ab3 | 1551 | #endif |
6e141546 | 1552 | #ifdef CONFIG_MMU |
ed032189 | 1553 | { |
ed032189 | 1554 | .procname = "mmap_min_addr", |
788084ab EP |
1555 | .data = &dac_mmap_min_addr, |
1556 | .maxlen = sizeof(unsigned long), | |
ed032189 | 1557 | .mode = 0644, |
6d456111 | 1558 | .proc_handler = mmap_min_addr_handler, |
ed032189 | 1559 | }, |
6e141546 | 1560 | #endif |
f0c0b2b8 KH |
1561 | #ifdef CONFIG_NUMA |
1562 | { | |
f0c0b2b8 KH |
1563 | .procname = "numa_zonelist_order", |
1564 | .data = &numa_zonelist_order, | |
1565 | .maxlen = NUMA_ZONELIST_ORDER_LEN, | |
1566 | .mode = 0644, | |
6d456111 | 1567 | .proc_handler = numa_zonelist_order_handler, |
f0c0b2b8 KH |
1568 | }, |
1569 | #endif | |
2b8232ce | 1570 | #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ |
5c36e657 | 1571 | (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) |
e6e5494c | 1572 | { |
e6e5494c | 1573 | .procname = "vdso_enabled", |
3d7ee969 AL |
1574 | #ifdef CONFIG_X86_32 |
1575 | .data = &vdso32_enabled, | |
1576 | .maxlen = sizeof(vdso32_enabled), | |
1577 | #else | |
e6e5494c IM |
1578 | .data = &vdso_enabled, |
1579 | .maxlen = sizeof(vdso_enabled), | |
3d7ee969 | 1580 | #endif |
e6e5494c | 1581 | .mode = 0644, |
6d456111 | 1582 | .proc_handler = proc_dointvec, |
e6e5494c IM |
1583 | .extra1 = &zero, |
1584 | }, | |
1da177e4 | 1585 | #endif |
195cf453 BG |
1586 | #ifdef CONFIG_HIGHMEM |
1587 | { | |
195cf453 BG |
1588 | .procname = "highmem_is_dirtyable", |
1589 | .data = &vm_highmem_is_dirtyable, | |
1590 | .maxlen = sizeof(vm_highmem_is_dirtyable), | |
1591 | .mode = 0644, | |
6d456111 | 1592 | .proc_handler = proc_dointvec_minmax, |
195cf453 BG |
1593 | .extra1 = &zero, |
1594 | .extra2 = &one, | |
1595 | }, | |
1596 | #endif | |
6a46079c AK |
1597 | #ifdef CONFIG_MEMORY_FAILURE |
1598 | { | |
6a46079c AK |
1599 | .procname = "memory_failure_early_kill", |
1600 | .data = &sysctl_memory_failure_early_kill, | |
1601 | .maxlen = sizeof(sysctl_memory_failure_early_kill), | |
1602 | .mode = 0644, | |
6d456111 | 1603 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1604 | .extra1 = &zero, |
1605 | .extra2 = &one, | |
1606 | }, | |
1607 | { | |
6a46079c AK |
1608 | .procname = "memory_failure_recovery", |
1609 | .data = &sysctl_memory_failure_recovery, | |
1610 | .maxlen = sizeof(sysctl_memory_failure_recovery), | |
1611 | .mode = 0644, | |
6d456111 | 1612 | .proc_handler = proc_dointvec_minmax, |
6a46079c AK |
1613 | .extra1 = &zero, |
1614 | .extra2 = &one, | |
1615 | }, | |
1616 | #endif | |
c9b1d098 AS |
1617 | { |
1618 | .procname = "user_reserve_kbytes", | |
1619 | .data = &sysctl_user_reserve_kbytes, | |
1620 | .maxlen = sizeof(sysctl_user_reserve_kbytes), | |
1621 | .mode = 0644, | |
1622 | .proc_handler = proc_doulongvec_minmax, | |
1623 | }, | |
4eeab4f5 AS |
1624 | { |
1625 | .procname = "admin_reserve_kbytes", | |
1626 | .data = &sysctl_admin_reserve_kbytes, | |
1627 | .maxlen = sizeof(sysctl_admin_reserve_kbytes), | |
1628 | .mode = 0644, | |
1629 | .proc_handler = proc_doulongvec_minmax, | |
1630 | }, | |
d07e2259 DC |
1631 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS |
1632 | { | |
1633 | .procname = "mmap_rnd_bits", | |
1634 | .data = &mmap_rnd_bits, | |
1635 | .maxlen = sizeof(mmap_rnd_bits), | |
1636 | .mode = 0600, | |
1637 | .proc_handler = proc_dointvec_minmax, | |
1638 | .extra1 = (void *)&mmap_rnd_bits_min, | |
1639 | .extra2 = (void *)&mmap_rnd_bits_max, | |
1640 | }, | |
1641 | #endif | |
1642 | #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS | |
1643 | { | |
1644 | .procname = "mmap_rnd_compat_bits", | |
1645 | .data = &mmap_rnd_compat_bits, | |
1646 | .maxlen = sizeof(mmap_rnd_compat_bits), | |
1647 | .mode = 0600, | |
1648 | .proc_handler = proc_dointvec_minmax, | |
1649 | .extra1 = (void *)&mmap_rnd_compat_bits_min, | |
1650 | .extra2 = (void *)&mmap_rnd_compat_bits_max, | |
1651 | }, | |
1652 | #endif | |
6fce56ec | 1653 | { } |
1da177e4 LT |
1654 | }; |
1655 | ||
d8217f07 | 1656 | static struct ctl_table fs_table[] = { |
1da177e4 | 1657 | { |
1da177e4 LT |
1658 | .procname = "inode-nr", |
1659 | .data = &inodes_stat, | |
3942c07c | 1660 | .maxlen = 2*sizeof(long), |
1da177e4 | 1661 | .mode = 0444, |
cffbc8aa | 1662 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1663 | }, |
1664 | { | |
1da177e4 LT |
1665 | .procname = "inode-state", |
1666 | .data = &inodes_stat, | |
3942c07c | 1667 | .maxlen = 7*sizeof(long), |
1da177e4 | 1668 | .mode = 0444, |
cffbc8aa | 1669 | .proc_handler = proc_nr_inodes, |
1da177e4 LT |
1670 | }, |
1671 | { | |
1da177e4 LT |
1672 | .procname = "file-nr", |
1673 | .data = &files_stat, | |
518de9b3 | 1674 | .maxlen = sizeof(files_stat), |
1da177e4 | 1675 | .mode = 0444, |
6d456111 | 1676 | .proc_handler = proc_nr_files, |
1da177e4 LT |
1677 | }, |
1678 | { | |
1da177e4 LT |
1679 | .procname = "file-max", |
1680 | .data = &files_stat.max_files, | |
518de9b3 | 1681 | .maxlen = sizeof(files_stat.max_files), |
1da177e4 | 1682 | .mode = 0644, |
518de9b3 | 1683 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1684 | }, |
9cfe015a | 1685 | { |
9cfe015a ED |
1686 | .procname = "nr_open", |
1687 | .data = &sysctl_nr_open, | |
9b80a184 | 1688 | .maxlen = sizeof(unsigned int), |
9cfe015a | 1689 | .mode = 0644, |
6d456111 | 1690 | .proc_handler = proc_dointvec_minmax, |
eceea0b3 AV |
1691 | .extra1 = &sysctl_nr_open_min, |
1692 | .extra2 = &sysctl_nr_open_max, | |
9cfe015a | 1693 | }, |
1da177e4 | 1694 | { |
1da177e4 LT |
1695 | .procname = "dentry-state", |
1696 | .data = &dentry_stat, | |
3942c07c | 1697 | .maxlen = 6*sizeof(long), |
1da177e4 | 1698 | .mode = 0444, |
312d3ca8 | 1699 | .proc_handler = proc_nr_dentry, |
1da177e4 LT |
1700 | }, |
1701 | { | |
1da177e4 LT |
1702 | .procname = "overflowuid", |
1703 | .data = &fs_overflowuid, | |
1704 | .maxlen = sizeof(int), | |
1705 | .mode = 0644, | |
6d456111 | 1706 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1707 | .extra1 = &minolduid, |
1708 | .extra2 = &maxolduid, | |
1709 | }, | |
1710 | { | |
1da177e4 LT |
1711 | .procname = "overflowgid", |
1712 | .data = &fs_overflowgid, | |
1713 | .maxlen = sizeof(int), | |
1714 | .mode = 0644, | |
6d456111 | 1715 | .proc_handler = proc_dointvec_minmax, |
1da177e4 LT |
1716 | .extra1 = &minolduid, |
1717 | .extra2 = &maxolduid, | |
1718 | }, | |
bfcd17a6 | 1719 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1720 | { |
1da177e4 LT |
1721 | .procname = "leases-enable", |
1722 | .data = &leases_enable, | |
1723 | .maxlen = sizeof(int), | |
1724 | .mode = 0644, | |
6d456111 | 1725 | .proc_handler = proc_dointvec, |
1da177e4 | 1726 | }, |
bfcd17a6 | 1727 | #endif |
1da177e4 LT |
1728 | #ifdef CONFIG_DNOTIFY |
1729 | { | |
1da177e4 LT |
1730 | .procname = "dir-notify-enable", |
1731 | .data = &dir_notify_enable, | |
1732 | .maxlen = sizeof(int), | |
1733 | .mode = 0644, | |
6d456111 | 1734 | .proc_handler = proc_dointvec, |
1da177e4 LT |
1735 | }, |
1736 | #endif | |
1737 | #ifdef CONFIG_MMU | |
bfcd17a6 | 1738 | #ifdef CONFIG_FILE_LOCKING |
1da177e4 | 1739 | { |
1da177e4 LT |
1740 | .procname = "lease-break-time", |
1741 | .data = &lease_break_time, | |
1742 | .maxlen = sizeof(int), | |
1743 | .mode = 0644, | |
6d456111 | 1744 | .proc_handler = proc_dointvec, |
1da177e4 | 1745 | }, |
bfcd17a6 | 1746 | #endif |
ebf3f09c | 1747 | #ifdef CONFIG_AIO |
1da177e4 | 1748 | { |
1da177e4 LT |
1749 | .procname = "aio-nr", |
1750 | .data = &aio_nr, | |
1751 | .maxlen = sizeof(aio_nr), | |
1752 | .mode = 0444, | |
6d456111 | 1753 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 LT |
1754 | }, |
1755 | { | |
1da177e4 LT |
1756 | .procname = "aio-max-nr", |
1757 | .data = &aio_max_nr, | |
1758 | .maxlen = sizeof(aio_max_nr), | |
1759 | .mode = 0644, | |
6d456111 | 1760 | .proc_handler = proc_doulongvec_minmax, |
1da177e4 | 1761 | }, |
ebf3f09c | 1762 | #endif /* CONFIG_AIO */ |
2d9048e2 | 1763 | #ifdef CONFIG_INOTIFY_USER |
0399cb08 | 1764 | { |
0399cb08 RL |
1765 | .procname = "inotify", |
1766 | .mode = 0555, | |
1767 | .child = inotify_table, | |
1768 | }, | |
1769 | #endif | |
7ef9964e DL |
1770 | #ifdef CONFIG_EPOLL |
1771 | { | |
1772 | .procname = "epoll", | |
1773 | .mode = 0555, | |
1774 | .child = epoll_table, | |
1775 | }, | |
1776 | #endif | |
1da177e4 | 1777 | #endif |
800179c9 KC |
1778 | { |
1779 | .procname = "protected_symlinks", | |
1780 | .data = &sysctl_protected_symlinks, | |
1781 | .maxlen = sizeof(int), | |
1782 | .mode = 0600, | |
1783 | .proc_handler = proc_dointvec_minmax, | |
1784 | .extra1 = &zero, | |
1785 | .extra2 = &one, | |
1786 | }, | |
1787 | { | |
1788 | .procname = "protected_hardlinks", | |
1789 | .data = &sysctl_protected_hardlinks, | |
1790 | .maxlen = sizeof(int), | |
1791 | .mode = 0600, | |
1792 | .proc_handler = proc_dointvec_minmax, | |
1793 | .extra1 = &zero, | |
1794 | .extra2 = &one, | |
1795 | }, | |
d6e71144 | 1796 | { |
d6e71144 AC |
1797 | .procname = "suid_dumpable", |
1798 | .data = &suid_dumpable, | |
1799 | .maxlen = sizeof(int), | |
1800 | .mode = 0644, | |
54b50199 | 1801 | .proc_handler = proc_dointvec_minmax_coredump, |
8e654fba MW |
1802 | .extra1 = &zero, |
1803 | .extra2 = &two, | |
d6e71144 | 1804 | }, |
2abc26fc EB |
1805 | #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) |
1806 | { | |
2abc26fc EB |
1807 | .procname = "binfmt_misc", |
1808 | .mode = 0555, | |
f9bd6733 | 1809 | .child = sysctl_mount_point, |
2abc26fc EB |
1810 | }, |
1811 | #endif | |
b492e95b | 1812 | { |
ff9da691 JA |
1813 | .procname = "pipe-max-size", |
1814 | .data = &pipe_max_size, | |
98159d97 | 1815 | .maxlen = sizeof(pipe_max_size), |
b492e95b | 1816 | .mode = 0644, |
319e0a21 | 1817 | .proc_handler = proc_dopipe_max_size, |
b492e95b | 1818 | }, |
759c0114 WT |
1819 | { |
1820 | .procname = "pipe-user-pages-hard", | |
1821 | .data = &pipe_user_pages_hard, | |
1822 | .maxlen = sizeof(pipe_user_pages_hard), | |
1823 | .mode = 0644, | |
1824 | .proc_handler = proc_doulongvec_minmax, | |
1825 | }, | |
1826 | { | |
1827 | .procname = "pipe-user-pages-soft", | |
1828 | .data = &pipe_user_pages_soft, | |
1829 | .maxlen = sizeof(pipe_user_pages_soft), | |
1830 | .mode = 0644, | |
1831 | .proc_handler = proc_doulongvec_minmax, | |
1832 | }, | |
d2921684 EB |
1833 | { |
1834 | .procname = "mount-max", | |
1835 | .data = &sysctl_mount_max, | |
1836 | .maxlen = sizeof(unsigned int), | |
1837 | .mode = 0644, | |
1838 | .proc_handler = proc_dointvec_minmax, | |
1839 | .extra1 = &one, | |
1840 | }, | |
6fce56ec | 1841 | { } |
1da177e4 LT |
1842 | }; |
1843 | ||
d8217f07 | 1844 | static struct ctl_table debug_table[] = { |
7ac57a89 | 1845 | #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE |
abd4f750 | 1846 | { |
abd4f750 MAS |
1847 | .procname = "exception-trace", |
1848 | .data = &show_unhandled_signals, | |
1849 | .maxlen = sizeof(int), | |
1850 | .mode = 0644, | |
1851 | .proc_handler = proc_dointvec | |
1852 | }, | |
b2be84df MH |
1853 | #endif |
1854 | #if defined(CONFIG_OPTPROBES) | |
1855 | { | |
1856 | .procname = "kprobes-optimization", | |
1857 | .data = &sysctl_kprobes_optimization, | |
1858 | .maxlen = sizeof(int), | |
1859 | .mode = 0644, | |
1860 | .proc_handler = proc_kprobes_optimization_handler, | |
1861 | .extra1 = &zero, | |
1862 | .extra2 = &one, | |
1863 | }, | |
abd4f750 | 1864 | #endif |
6fce56ec | 1865 | { } |
1da177e4 LT |
1866 | }; |
1867 | ||
d8217f07 | 1868 | static struct ctl_table dev_table[] = { |
6fce56ec | 1869 | { } |
0eeca283 | 1870 | }; |
1da177e4 | 1871 | |
de4e83bd | 1872 | int __init sysctl_init(void) |
d912b0cc | 1873 | { |
fd4b616b SR |
1874 | struct ctl_table_header *hdr; |
1875 | ||
1876 | hdr = register_sysctl_table(sysctl_base_table); | |
1877 | kmemleak_not_leak(hdr); | |
d912b0cc EB |
1878 | return 0; |
1879 | } | |
1880 | ||
b89a8171 EB |
1881 | #endif /* CONFIG_SYSCTL */ |
1882 | ||
1da177e4 LT |
1883 | /* |
1884 | * /proc/sys support | |
1885 | */ | |
1886 | ||
b89a8171 | 1887 | #ifdef CONFIG_PROC_SYSCTL |
1da177e4 | 1888 | |
f8808300 KC |
1889 | static int _proc_do_string(char *data, int maxlen, int write, |
1890 | char __user *buffer, | |
b1ba4ddd | 1891 | size_t *lenp, loff_t *ppos) |
1da177e4 LT |
1892 | { |
1893 | size_t len; | |
1894 | char __user *p; | |
1895 | char c; | |
8d060877 ON |
1896 | |
1897 | if (!data || !maxlen || !*lenp) { | |
1da177e4 LT |
1898 | *lenp = 0; |
1899 | return 0; | |
1900 | } | |
8d060877 | 1901 | |
1da177e4 | 1902 | if (write) { |
f4aacea2 KC |
1903 | if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { |
1904 | /* Only continue writes not past the end of buffer. */ | |
1905 | len = strlen(data); | |
1906 | if (len > maxlen - 1) | |
1907 | len = maxlen - 1; | |
1908 | ||
1909 | if (*ppos > len) | |
1910 | return 0; | |
1911 | len = *ppos; | |
1912 | } else { | |
1913 | /* Start writing from beginning of buffer. */ | |
1914 | len = 0; | |
1915 | } | |
1916 | ||
2ca9bb45 | 1917 | *ppos += *lenp; |
1da177e4 | 1918 | p = buffer; |
2ca9bb45 | 1919 | while ((p - buffer) < *lenp && len < maxlen - 1) { |
1da177e4 LT |
1920 | if (get_user(c, p++)) |
1921 | return -EFAULT; | |
1922 | if (c == 0 || c == '\n') | |
1923 | break; | |
2ca9bb45 | 1924 | data[len++] = c; |
1da177e4 | 1925 | } |
f8808300 | 1926 | data[len] = 0; |
1da177e4 | 1927 | } else { |
f5dd3d6f SV |
1928 | len = strlen(data); |
1929 | if (len > maxlen) | |
1930 | len = maxlen; | |
8d060877 ON |
1931 | |
1932 | if (*ppos > len) { | |
1933 | *lenp = 0; | |
1934 | return 0; | |
1935 | } | |
1936 | ||
1937 | data += *ppos; | |
1938 | len -= *ppos; | |
1939 | ||
1da177e4 LT |
1940 | if (len > *lenp) |
1941 | len = *lenp; | |
1942 | if (len) | |
f8808300 | 1943 | if (copy_to_user(buffer, data, len)) |
1da177e4 LT |
1944 | return -EFAULT; |
1945 | if (len < *lenp) { | |
f8808300 | 1946 | if (put_user('\n', buffer + len)) |
1da177e4 LT |
1947 | return -EFAULT; |
1948 | len++; | |
1949 | } | |
1950 | *lenp = len; | |
1951 | *ppos += len; | |
1952 | } | |
1953 | return 0; | |
1954 | } | |
1955 | ||
f4aacea2 KC |
1956 | static void warn_sysctl_write(struct ctl_table *table) |
1957 | { | |
1958 | pr_warn_once("%s wrote to %s when file position was not 0!\n" | |
1959 | "This will not be supported in the future. To silence this\n" | |
1960 | "warning, set kernel.sysctl_writes_strict = -1\n", | |
1961 | current->comm, table->procname); | |
1962 | } | |
1963 | ||
d383d484 LR |
1964 | /** |
1965 | * proc_first_pos_non_zero_ignore - check if firs position is allowed | |
1966 | * @ppos: file position | |
1967 | * @table: the sysctl table | |
1968 | * | |
1969 | * Returns true if the first position is non-zero and the sysctl_writes_strict | |
1970 | * mode indicates this is not allowed for numeric input types. String proc | |
1971 | * hadlers can ignore the return value. | |
1972 | */ | |
1973 | static bool proc_first_pos_non_zero_ignore(loff_t *ppos, | |
1974 | struct ctl_table *table) | |
1975 | { | |
1976 | if (!*ppos) | |
1977 | return false; | |
1978 | ||
1979 | switch (sysctl_writes_strict) { | |
1980 | case SYSCTL_WRITES_STRICT: | |
1981 | return true; | |
1982 | case SYSCTL_WRITES_WARN: | |
1983 | warn_sysctl_write(table); | |
1984 | return false; | |
1985 | default: | |
1986 | return false; | |
1987 | } | |
1988 | } | |
1989 | ||
f5dd3d6f SV |
1990 | /** |
1991 | * proc_dostring - read a string sysctl | |
1992 | * @table: the sysctl table | |
1993 | * @write: %TRUE if this is a write to the sysctl file | |
f5dd3d6f SV |
1994 | * @buffer: the user buffer |
1995 | * @lenp: the size of the user buffer | |
1996 | * @ppos: file position | |
1997 | * | |
1998 | * Reads/writes a string from/to the user buffer. If the kernel | |
1999 | * buffer provided is not large enough to hold the string, the | |
2000 | * string is truncated. The copied string is %NULL-terminated. | |
2001 | * If the string is being read by the user process, it is copied | |
2002 | * and a newline '\n' is added. It is truncated if the buffer is | |
2003 | * not large enough. | |
2004 | * | |
2005 | * Returns 0 on success. | |
2006 | */ | |
8d65af78 | 2007 | int proc_dostring(struct ctl_table *table, int write, |
f5dd3d6f SV |
2008 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2009 | { | |
d383d484 LR |
2010 | if (write) |
2011 | proc_first_pos_non_zero_ignore(ppos, table); | |
f4aacea2 | 2012 | |
f8808300 KC |
2013 | return _proc_do_string((char *)(table->data), table->maxlen, write, |
2014 | (char __user *)buffer, lenp, ppos); | |
f5dd3d6f SV |
2015 | } |
2016 | ||
00b7c339 AW |
2017 | static size_t proc_skip_spaces(char **buf) |
2018 | { | |
2019 | size_t ret; | |
2020 | char *tmp = skip_spaces(*buf); | |
2021 | ret = tmp - *buf; | |
2022 | *buf = tmp; | |
2023 | return ret; | |
2024 | } | |
2025 | ||
9f977fb7 OP |
2026 | static void proc_skip_char(char **buf, size_t *size, const char v) |
2027 | { | |
2028 | while (*size) { | |
2029 | if (**buf != v) | |
2030 | break; | |
2031 | (*size)--; | |
2032 | (*buf)++; | |
2033 | } | |
2034 | } | |
2035 | ||
00b7c339 AW |
2036 | #define TMPBUFLEN 22 |
2037 | /** | |
0fc377bd | 2038 | * proc_get_long - reads an ASCII formatted integer from a user buffer |
00b7c339 | 2039 | * |
0fc377bd RD |
2040 | * @buf: a kernel buffer |
2041 | * @size: size of the kernel buffer | |
2042 | * @val: this is where the number will be stored | |
2043 | * @neg: set to %TRUE if number is negative | |
2044 | * @perm_tr: a vector which contains the allowed trailers | |
2045 | * @perm_tr_len: size of the perm_tr vector | |
2046 | * @tr: pointer to store the trailer character | |
00b7c339 | 2047 | * |
0fc377bd RD |
2048 | * In case of success %0 is returned and @buf and @size are updated with |
2049 | * the amount of bytes read. If @tr is non-NULL and a trailing | |
2050 | * character exists (size is non-zero after returning from this | |
2051 | * function), @tr is updated with the trailing character. | |
00b7c339 AW |
2052 | */ |
2053 | static int proc_get_long(char **buf, size_t *size, | |
2054 | unsigned long *val, bool *neg, | |
2055 | const char *perm_tr, unsigned perm_tr_len, char *tr) | |
2056 | { | |
2057 | int len; | |
2058 | char *p, tmp[TMPBUFLEN]; | |
2059 | ||
2060 | if (!*size) | |
2061 | return -EINVAL; | |
2062 | ||
2063 | len = *size; | |
2064 | if (len > TMPBUFLEN - 1) | |
2065 | len = TMPBUFLEN - 1; | |
2066 | ||
2067 | memcpy(tmp, *buf, len); | |
2068 | ||
2069 | tmp[len] = 0; | |
2070 | p = tmp; | |
2071 | if (*p == '-' && *size > 1) { | |
2072 | *neg = true; | |
2073 | p++; | |
2074 | } else | |
2075 | *neg = false; | |
2076 | if (!isdigit(*p)) | |
2077 | return -EINVAL; | |
2078 | ||
2079 | *val = simple_strtoul(p, &p, 0); | |
2080 | ||
2081 | len = p - tmp; | |
2082 | ||
2083 | /* We don't know if the next char is whitespace thus we may accept | |
2084 | * invalid integers (e.g. 1234...a) or two integers instead of one | |
2085 | * (e.g. 123...1). So lets not allow such large numbers. */ | |
2086 | if (len == TMPBUFLEN - 1) | |
2087 | return -EINVAL; | |
2088 | ||
2089 | if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) | |
2090 | return -EINVAL; | |
1da177e4 | 2091 | |
00b7c339 AW |
2092 | if (tr && (len < *size)) |
2093 | *tr = *p; | |
2094 | ||
2095 | *buf += len; | |
2096 | *size -= len; | |
2097 | ||
2098 | return 0; | |
2099 | } | |
2100 | ||
2101 | /** | |
0fc377bd | 2102 | * proc_put_long - converts an integer to a decimal ASCII formatted string |
00b7c339 | 2103 | * |
0fc377bd RD |
2104 | * @buf: the user buffer |
2105 | * @size: the size of the user buffer | |
2106 | * @val: the integer to be converted | |
2107 | * @neg: sign of the number, %TRUE for negative | |
00b7c339 | 2108 | * |
0fc377bd RD |
2109 | * In case of success %0 is returned and @buf and @size are updated with |
2110 | * the amount of bytes written. | |
00b7c339 AW |
2111 | */ |
2112 | static int proc_put_long(void __user **buf, size_t *size, unsigned long val, | |
2113 | bool neg) | |
2114 | { | |
2115 | int len; | |
2116 | char tmp[TMPBUFLEN], *p = tmp; | |
2117 | ||
2118 | sprintf(p, "%s%lu", neg ? "-" : "", val); | |
2119 | len = strlen(tmp); | |
2120 | if (len > *size) | |
2121 | len = *size; | |
2122 | if (copy_to_user(*buf, tmp, len)) | |
2123 | return -EFAULT; | |
2124 | *size -= len; | |
2125 | *buf += len; | |
2126 | return 0; | |
2127 | } | |
2128 | #undef TMPBUFLEN | |
2129 | ||
2130 | static int proc_put_char(void __user **buf, size_t *size, char c) | |
2131 | { | |
2132 | if (*size) { | |
2133 | char __user **buffer = (char __user **)buf; | |
2134 | if (put_user(c, *buffer)) | |
2135 | return -EFAULT; | |
2136 | (*size)--, (*buffer)++; | |
2137 | *buf = *buffer; | |
2138 | } | |
2139 | return 0; | |
2140 | } | |
1da177e4 | 2141 | |
00b7c339 | 2142 | static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2143 | int *valp, |
2144 | int write, void *data) | |
2145 | { | |
2146 | if (write) { | |
230633d1 HS |
2147 | if (*negp) { |
2148 | if (*lvalp > (unsigned long) INT_MAX + 1) | |
2149 | return -EINVAL; | |
2150 | *valp = -*lvalp; | |
2151 | } else { | |
2152 | if (*lvalp > (unsigned long) INT_MAX) | |
2153 | return -EINVAL; | |
2154 | *valp = *lvalp; | |
2155 | } | |
1da177e4 LT |
2156 | } else { |
2157 | int val = *valp; | |
2158 | if (val < 0) { | |
00b7c339 | 2159 | *negp = true; |
9a5bc726 | 2160 | *lvalp = -(unsigned long)val; |
1da177e4 | 2161 | } else { |
00b7c339 | 2162 | *negp = false; |
1da177e4 LT |
2163 | *lvalp = (unsigned long)val; |
2164 | } | |
2165 | } | |
2166 | return 0; | |
2167 | } | |
2168 | ||
4f2fec00 LR |
2169 | static int do_proc_douintvec_conv(unsigned long *lvalp, |
2170 | unsigned int *valp, | |
2171 | int write, void *data) | |
e7d316a0 SAK |
2172 | { |
2173 | if (write) { | |
425fffd8 LZ |
2174 | if (*lvalp > UINT_MAX) |
2175 | return -EINVAL; | |
e7d316a0 SAK |
2176 | *valp = *lvalp; |
2177 | } else { | |
2178 | unsigned int val = *valp; | |
2179 | *lvalp = (unsigned long)val; | |
2180 | } | |
2181 | return 0; | |
2182 | } | |
2183 | ||
00b7c339 AW |
2184 | static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; |
2185 | ||
d8217f07 | 2186 | static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, |
8d65af78 | 2187 | int write, void __user *buffer, |
fcfbd547 | 2188 | size_t *lenp, loff_t *ppos, |
00b7c339 | 2189 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
1da177e4 LT |
2190 | int write, void *data), |
2191 | void *data) | |
2192 | { | |
00b7c339 | 2193 | int *i, vleft, first = 1, err = 0; |
00b7c339 | 2194 | size_t left; |
70f6cbb6 | 2195 | char *kbuf = NULL, *p; |
1da177e4 | 2196 | |
00b7c339 | 2197 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { |
1da177e4 LT |
2198 | *lenp = 0; |
2199 | return 0; | |
2200 | } | |
2201 | ||
fcfbd547 | 2202 | i = (int *) tbl_data; |
1da177e4 LT |
2203 | vleft = table->maxlen / sizeof(*i); |
2204 | left = *lenp; | |
2205 | ||
2206 | if (!conv) | |
2207 | conv = do_proc_dointvec_conv; | |
2208 | ||
00b7c339 | 2209 | if (write) { |
d383d484 LR |
2210 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2211 | goto out; | |
f4aacea2 | 2212 | |
00b7c339 AW |
2213 | if (left > PAGE_SIZE - 1) |
2214 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2215 | p = kbuf = memdup_user_nul(buffer, left); |
2216 | if (IS_ERR(kbuf)) | |
2217 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2218 | } |
2219 | ||
1da177e4 | 2220 | for (; left && vleft--; i++, first=0) { |
00b7c339 AW |
2221 | unsigned long lval; |
2222 | bool neg; | |
1da177e4 | 2223 | |
00b7c339 | 2224 | if (write) { |
70f6cbb6 | 2225 | left -= proc_skip_spaces(&p); |
1da177e4 | 2226 | |
563b0467 O |
2227 | if (!left) |
2228 | break; | |
70f6cbb6 | 2229 | err = proc_get_long(&p, &left, &lval, &neg, |
00b7c339 AW |
2230 | proc_wspace_sep, |
2231 | sizeof(proc_wspace_sep), NULL); | |
2232 | if (err) | |
1da177e4 | 2233 | break; |
00b7c339 AW |
2234 | if (conv(&neg, &lval, i, 1, data)) { |
2235 | err = -EINVAL; | |
1da177e4 | 2236 | break; |
00b7c339 | 2237 | } |
1da177e4 | 2238 | } else { |
00b7c339 AW |
2239 | if (conv(&neg, &lval, i, 0, data)) { |
2240 | err = -EINVAL; | |
2241 | break; | |
2242 | } | |
1da177e4 | 2243 | if (!first) |
00b7c339 AW |
2244 | err = proc_put_char(&buffer, &left, '\t'); |
2245 | if (err) | |
2246 | break; | |
2247 | err = proc_put_long(&buffer, &left, lval, neg); | |
2248 | if (err) | |
1da177e4 | 2249 | break; |
1da177e4 LT |
2250 | } |
2251 | } | |
2252 | ||
00b7c339 AW |
2253 | if (!write && !first && left && !err) |
2254 | err = proc_put_char(&buffer, &left, '\n'); | |
563b0467 | 2255 | if (write && !err && left) |
70f6cbb6 | 2256 | left -= proc_skip_spaces(&p); |
1da177e4 | 2257 | if (write) { |
70f6cbb6 | 2258 | kfree(kbuf); |
00b7c339 AW |
2259 | if (first) |
2260 | return err ? : -EINVAL; | |
1da177e4 | 2261 | } |
1da177e4 | 2262 | *lenp -= left; |
f4aacea2 | 2263 | out: |
1da177e4 | 2264 | *ppos += *lenp; |
00b7c339 | 2265 | return err; |
1da177e4 LT |
2266 | } |
2267 | ||
8d65af78 | 2268 | static int do_proc_dointvec(struct ctl_table *table, int write, |
fcfbd547 | 2269 | void __user *buffer, size_t *lenp, loff_t *ppos, |
00b7c339 | 2270 | int (*conv)(bool *negp, unsigned long *lvalp, int *valp, |
fcfbd547 KK |
2271 | int write, void *data), |
2272 | void *data) | |
2273 | { | |
8d65af78 | 2274 | return __do_proc_dointvec(table->data, table, write, |
fcfbd547 KK |
2275 | buffer, lenp, ppos, conv, data); |
2276 | } | |
2277 | ||
4f2fec00 LR |
2278 | static int do_proc_douintvec_w(unsigned int *tbl_data, |
2279 | struct ctl_table *table, | |
2280 | void __user *buffer, | |
2281 | size_t *lenp, loff_t *ppos, | |
2282 | int (*conv)(unsigned long *lvalp, | |
2283 | unsigned int *valp, | |
2284 | int write, void *data), | |
2285 | void *data) | |
2286 | { | |
2287 | unsigned long lval; | |
2288 | int err = 0; | |
2289 | size_t left; | |
2290 | bool neg; | |
2291 | char *kbuf = NULL, *p; | |
2292 | ||
2293 | left = *lenp; | |
2294 | ||
2295 | if (proc_first_pos_non_zero_ignore(ppos, table)) | |
2296 | goto bail_early; | |
2297 | ||
2298 | if (left > PAGE_SIZE - 1) | |
2299 | left = PAGE_SIZE - 1; | |
2300 | ||
2301 | p = kbuf = memdup_user_nul(buffer, left); | |
2302 | if (IS_ERR(kbuf)) | |
2303 | return -EINVAL; | |
2304 | ||
2305 | left -= proc_skip_spaces(&p); | |
2306 | if (!left) { | |
2307 | err = -EINVAL; | |
2308 | goto out_free; | |
2309 | } | |
2310 | ||
2311 | err = proc_get_long(&p, &left, &lval, &neg, | |
2312 | proc_wspace_sep, | |
2313 | sizeof(proc_wspace_sep), NULL); | |
2314 | if (err || neg) { | |
2315 | err = -EINVAL; | |
2316 | goto out_free; | |
2317 | } | |
2318 | ||
2319 | if (conv(&lval, tbl_data, 1, data)) { | |
2320 | err = -EINVAL; | |
2321 | goto out_free; | |
2322 | } | |
2323 | ||
2324 | if (!err && left) | |
2325 | left -= proc_skip_spaces(&p); | |
2326 | ||
2327 | out_free: | |
2328 | kfree(kbuf); | |
2329 | if (err) | |
2330 | return -EINVAL; | |
2331 | ||
2332 | return 0; | |
2333 | ||
2334 | /* This is in keeping with old __do_proc_dointvec() */ | |
2335 | bail_early: | |
2336 | *ppos += *lenp; | |
2337 | return err; | |
2338 | } | |
2339 | ||
2340 | static int do_proc_douintvec_r(unsigned int *tbl_data, void __user *buffer, | |
2341 | size_t *lenp, loff_t *ppos, | |
2342 | int (*conv)(unsigned long *lvalp, | |
2343 | unsigned int *valp, | |
2344 | int write, void *data), | |
2345 | void *data) | |
2346 | { | |
2347 | unsigned long lval; | |
2348 | int err = 0; | |
2349 | size_t left; | |
2350 | ||
2351 | left = *lenp; | |
2352 | ||
2353 | if (conv(&lval, tbl_data, 0, data)) { | |
2354 | err = -EINVAL; | |
2355 | goto out; | |
2356 | } | |
2357 | ||
2358 | err = proc_put_long(&buffer, &left, lval, false); | |
2359 | if (err || !left) | |
2360 | goto out; | |
2361 | ||
2362 | err = proc_put_char(&buffer, &left, '\n'); | |
2363 | ||
2364 | out: | |
2365 | *lenp -= left; | |
2366 | *ppos += *lenp; | |
2367 | ||
2368 | return err; | |
2369 | } | |
2370 | ||
2371 | static int __do_proc_douintvec(void *tbl_data, struct ctl_table *table, | |
2372 | int write, void __user *buffer, | |
2373 | size_t *lenp, loff_t *ppos, | |
2374 | int (*conv)(unsigned long *lvalp, | |
2375 | unsigned int *valp, | |
2376 | int write, void *data), | |
2377 | void *data) | |
2378 | { | |
2379 | unsigned int *i, vleft; | |
2380 | ||
2381 | if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
2382 | *lenp = 0; | |
2383 | return 0; | |
2384 | } | |
2385 | ||
2386 | i = (unsigned int *) tbl_data; | |
2387 | vleft = table->maxlen / sizeof(*i); | |
2388 | ||
2389 | /* | |
2390 | * Arrays are not supported, keep this simple. *Do not* add | |
2391 | * support for them. | |
2392 | */ | |
2393 | if (vleft != 1) { | |
2394 | *lenp = 0; | |
2395 | return -EINVAL; | |
2396 | } | |
2397 | ||
2398 | if (!conv) | |
2399 | conv = do_proc_douintvec_conv; | |
2400 | ||
2401 | if (write) | |
2402 | return do_proc_douintvec_w(i, table, buffer, lenp, ppos, | |
2403 | conv, data); | |
2404 | return do_proc_douintvec_r(i, buffer, lenp, ppos, conv, data); | |
2405 | } | |
2406 | ||
2407 | static int do_proc_douintvec(struct ctl_table *table, int write, | |
2408 | void __user *buffer, size_t *lenp, loff_t *ppos, | |
2409 | int (*conv)(unsigned long *lvalp, | |
2410 | unsigned int *valp, | |
2411 | int write, void *data), | |
2412 | void *data) | |
2413 | { | |
2414 | return __do_proc_douintvec(table->data, table, write, | |
2415 | buffer, lenp, ppos, conv, data); | |
2416 | } | |
2417 | ||
1da177e4 LT |
2418 | /** |
2419 | * proc_dointvec - read a vector of integers | |
2420 | * @table: the sysctl table | |
2421 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2422 | * @buffer: the user buffer |
2423 | * @lenp: the size of the user buffer | |
2424 | * @ppos: file position | |
2425 | * | |
2426 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2427 | * values from/to the user buffer, treated as an ASCII string. | |
2428 | * | |
2429 | * Returns 0 on success. | |
2430 | */ | |
8d65af78 | 2431 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 LT |
2432 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2433 | { | |
e7d316a0 SAK |
2434 | return do_proc_dointvec(table, write, buffer, lenp, ppos, NULL, NULL); |
2435 | } | |
2436 | ||
2437 | /** | |
2438 | * proc_douintvec - read a vector of unsigned integers | |
2439 | * @table: the sysctl table | |
2440 | * @write: %TRUE if this is a write to the sysctl file | |
2441 | * @buffer: the user buffer | |
2442 | * @lenp: the size of the user buffer | |
2443 | * @ppos: file position | |
2444 | * | |
2445 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2446 | * values from/to the user buffer, treated as an ASCII string. | |
2447 | * | |
2448 | * Returns 0 on success. | |
2449 | */ | |
2450 | int proc_douintvec(struct ctl_table *table, int write, | |
2451 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2452 | { | |
4f2fec00 LR |
2453 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
2454 | do_proc_douintvec_conv, NULL); | |
1da177e4 LT |
2455 | } |
2456 | ||
34f5a398 | 2457 | /* |
25ddbb18 AK |
2458 | * Taint values can only be increased |
2459 | * This means we can safely use a temporary. | |
34f5a398 | 2460 | */ |
8d65af78 | 2461 | static int proc_taint(struct ctl_table *table, int write, |
34f5a398 TT |
2462 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2463 | { | |
25ddbb18 AK |
2464 | struct ctl_table t; |
2465 | unsigned long tmptaint = get_taint(); | |
2466 | int err; | |
34f5a398 | 2467 | |
91fcd412 | 2468 | if (write && !capable(CAP_SYS_ADMIN)) |
34f5a398 TT |
2469 | return -EPERM; |
2470 | ||
25ddbb18 AK |
2471 | t = *table; |
2472 | t.data = &tmptaint; | |
8d65af78 | 2473 | err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); |
25ddbb18 AK |
2474 | if (err < 0) |
2475 | return err; | |
2476 | ||
2477 | if (write) { | |
2478 | /* | |
2479 | * Poor man's atomic or. Not worth adding a primitive | |
2480 | * to everyone's atomic.h for this | |
2481 | */ | |
2482 | int i; | |
2483 | for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { | |
2484 | if ((tmptaint >> i) & 1) | |
373d4d09 | 2485 | add_taint(i, LOCKDEP_STILL_OK); |
25ddbb18 AK |
2486 | } |
2487 | } | |
2488 | ||
2489 | return err; | |
34f5a398 TT |
2490 | } |
2491 | ||
bfdc0b49 | 2492 | #ifdef CONFIG_PRINTK |
620f6e8e | 2493 | static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, |
bfdc0b49 RW |
2494 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2495 | { | |
2496 | if (write && !capable(CAP_SYS_ADMIN)) | |
2497 | return -EPERM; | |
2498 | ||
2499 | return proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2500 | } | |
2501 | #endif | |
2502 | ||
1da177e4 LT |
2503 | struct do_proc_dointvec_minmax_conv_param { |
2504 | int *min; | |
2505 | int *max; | |
2506 | }; | |
2507 | ||
00b7c339 AW |
2508 | static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, |
2509 | int *valp, | |
1da177e4 LT |
2510 | int write, void *data) |
2511 | { | |
2512 | struct do_proc_dointvec_minmax_conv_param *param = data; | |
2513 | if (write) { | |
2514 | int val = *negp ? -*lvalp : *lvalp; | |
2515 | if ((param->min && *param->min > val) || | |
2516 | (param->max && *param->max < val)) | |
2517 | return -EINVAL; | |
2518 | *valp = val; | |
2519 | } else { | |
2520 | int val = *valp; | |
2521 | if (val < 0) { | |
00b7c339 | 2522 | *negp = true; |
9a5bc726 | 2523 | *lvalp = -(unsigned long)val; |
1da177e4 | 2524 | } else { |
00b7c339 | 2525 | *negp = false; |
1da177e4 LT |
2526 | *lvalp = (unsigned long)val; |
2527 | } | |
2528 | } | |
2529 | return 0; | |
2530 | } | |
2531 | ||
2532 | /** | |
2533 | * proc_dointvec_minmax - read a vector of integers with min/max values | |
2534 | * @table: the sysctl table | |
2535 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2536 | * @buffer: the user buffer |
2537 | * @lenp: the size of the user buffer | |
2538 | * @ppos: file position | |
2539 | * | |
2540 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2541 | * values from/to the user buffer, treated as an ASCII string. | |
2542 | * | |
2543 | * This routine will ensure the values are within the range specified by | |
2544 | * table->extra1 (min) and table->extra2 (max). | |
2545 | * | |
2546 | * Returns 0 on success. | |
2547 | */ | |
8d65af78 | 2548 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2549 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2550 | { | |
2551 | struct do_proc_dointvec_minmax_conv_param param = { | |
2552 | .min = (int *) table->extra1, | |
2553 | .max = (int *) table->extra2, | |
2554 | }; | |
8d65af78 | 2555 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2556 | do_proc_dointvec_minmax_conv, ¶m); |
2557 | } | |
2558 | ||
61d9b56a LR |
2559 | struct do_proc_douintvec_minmax_conv_param { |
2560 | unsigned int *min; | |
2561 | unsigned int *max; | |
2562 | }; | |
2563 | ||
2564 | static int do_proc_douintvec_minmax_conv(unsigned long *lvalp, | |
2565 | unsigned int *valp, | |
2566 | int write, void *data) | |
2567 | { | |
2568 | struct do_proc_douintvec_minmax_conv_param *param = data; | |
2569 | ||
2570 | if (write) { | |
2571 | unsigned int val = *lvalp; | |
2572 | ||
fb910c42 JL |
2573 | if (*lvalp > UINT_MAX) |
2574 | return -EINVAL; | |
2575 | ||
61d9b56a LR |
2576 | if ((param->min && *param->min > val) || |
2577 | (param->max && *param->max < val)) | |
2578 | return -ERANGE; | |
2579 | ||
61d9b56a LR |
2580 | *valp = val; |
2581 | } else { | |
2582 | unsigned int val = *valp; | |
2583 | *lvalp = (unsigned long) val; | |
2584 | } | |
2585 | ||
2586 | return 0; | |
2587 | } | |
2588 | ||
2589 | /** | |
2590 | * proc_douintvec_minmax - read a vector of unsigned ints with min/max values | |
2591 | * @table: the sysctl table | |
2592 | * @write: %TRUE if this is a write to the sysctl file | |
2593 | * @buffer: the user buffer | |
2594 | * @lenp: the size of the user buffer | |
2595 | * @ppos: file position | |
2596 | * | |
2597 | * Reads/writes up to table->maxlen/sizeof(unsigned int) unsigned integer | |
2598 | * values from/to the user buffer, treated as an ASCII string. Negative | |
2599 | * strings are not allowed. | |
2600 | * | |
2601 | * This routine will ensure the values are within the range specified by | |
2602 | * table->extra1 (min) and table->extra2 (max). There is a final sanity | |
2603 | * check for UINT_MAX to avoid having to support wrap around uses from | |
2604 | * userspace. | |
2605 | * | |
2606 | * Returns 0 on success. | |
2607 | */ | |
2608 | int proc_douintvec_minmax(struct ctl_table *table, int write, | |
2609 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2610 | { | |
2611 | struct do_proc_douintvec_minmax_conv_param param = { | |
2612 | .min = (unsigned int *) table->extra1, | |
2613 | .max = (unsigned int *) table->extra2, | |
2614 | }; | |
2615 | return do_proc_douintvec(table, write, buffer, lenp, ppos, | |
2616 | do_proc_douintvec_minmax_conv, ¶m); | |
2617 | } | |
2618 | ||
7a8d1819 JL |
2619 | static int do_proc_dopipe_max_size_conv(unsigned long *lvalp, |
2620 | unsigned int *valp, | |
2621 | int write, void *data) | |
2622 | { | |
7a8d1819 | 2623 | if (write) { |
fb910c42 | 2624 | unsigned int val; |
7a8d1819 | 2625 | |
fb910c42 | 2626 | val = round_pipe_size(*lvalp); |
7a8d1819 JL |
2627 | if (val == 0) |
2628 | return -EINVAL; | |
2629 | ||
7a8d1819 JL |
2630 | *valp = val; |
2631 | } else { | |
2632 | unsigned int val = *valp; | |
2633 | *lvalp = (unsigned long) val; | |
2634 | } | |
2635 | ||
2636 | return 0; | |
2637 | } | |
2638 | ||
319e0a21 EB |
2639 | static int proc_dopipe_max_size(struct ctl_table *table, int write, |
2640 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
7a8d1819 | 2641 | { |
7a8d1819 | 2642 | return do_proc_douintvec(table, write, buffer, lenp, ppos, |
4c2e4bef | 2643 | do_proc_dopipe_max_size_conv, NULL); |
7a8d1819 JL |
2644 | } |
2645 | ||
54b50199 KC |
2646 | static void validate_coredump_safety(void) |
2647 | { | |
046d662f | 2648 | #ifdef CONFIG_COREDUMP |
e579d2c2 | 2649 | if (suid_dumpable == SUID_DUMP_ROOT && |
54b50199 | 2650 | core_pattern[0] != '/' && core_pattern[0] != '|') { |
760c6a91 AD |
2651 | printk(KERN_WARNING |
2652 | "Unsafe core_pattern used with fs.suid_dumpable=2.\n" | |
2653 | "Pipe handler or fully qualified core dump path required.\n" | |
2654 | "Set kernel.core_pattern before fs.suid_dumpable.\n" | |
2655 | ); | |
54b50199 | 2656 | } |
046d662f | 2657 | #endif |
54b50199 KC |
2658 | } |
2659 | ||
2660 | static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, | |
2661 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2662 | { | |
2663 | int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | |
2664 | if (!error) | |
2665 | validate_coredump_safety(); | |
2666 | return error; | |
2667 | } | |
2668 | ||
046d662f | 2669 | #ifdef CONFIG_COREDUMP |
54b50199 KC |
2670 | static int proc_dostring_coredump(struct ctl_table *table, int write, |
2671 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2672 | { | |
2673 | int error = proc_dostring(table, write, buffer, lenp, ppos); | |
2674 | if (!error) | |
2675 | validate_coredump_safety(); | |
2676 | return error; | |
2677 | } | |
046d662f | 2678 | #endif |
54b50199 | 2679 | |
d8217f07 | 2680 | static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, |
1da177e4 LT |
2681 | void __user *buffer, |
2682 | size_t *lenp, loff_t *ppos, | |
2683 | unsigned long convmul, | |
2684 | unsigned long convdiv) | |
2685 | { | |
00b7c339 AW |
2686 | unsigned long *i, *min, *max; |
2687 | int vleft, first = 1, err = 0; | |
00b7c339 | 2688 | size_t left; |
70f6cbb6 | 2689 | char *kbuf = NULL, *p; |
00b7c339 AW |
2690 | |
2691 | if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { | |
1da177e4 LT |
2692 | *lenp = 0; |
2693 | return 0; | |
2694 | } | |
00b7c339 | 2695 | |
fcfbd547 | 2696 | i = (unsigned long *) data; |
1da177e4 LT |
2697 | min = (unsigned long *) table->extra1; |
2698 | max = (unsigned long *) table->extra2; | |
2699 | vleft = table->maxlen / sizeof(unsigned long); | |
2700 | left = *lenp; | |
00b7c339 AW |
2701 | |
2702 | if (write) { | |
d383d484 LR |
2703 | if (proc_first_pos_non_zero_ignore(ppos, table)) |
2704 | goto out; | |
f4aacea2 | 2705 | |
00b7c339 AW |
2706 | if (left > PAGE_SIZE - 1) |
2707 | left = PAGE_SIZE - 1; | |
70f6cbb6 AV |
2708 | p = kbuf = memdup_user_nul(buffer, left); |
2709 | if (IS_ERR(kbuf)) | |
2710 | return PTR_ERR(kbuf); | |
00b7c339 AW |
2711 | } |
2712 | ||
27b3d80a | 2713 | for (; left && vleft--; i++, first = 0) { |
00b7c339 AW |
2714 | unsigned long val; |
2715 | ||
1da177e4 | 2716 | if (write) { |
00b7c339 AW |
2717 | bool neg; |
2718 | ||
70f6cbb6 | 2719 | left -= proc_skip_spaces(&p); |
00b7c339 | 2720 | |
70f6cbb6 | 2721 | err = proc_get_long(&p, &left, &val, &neg, |
00b7c339 AW |
2722 | proc_wspace_sep, |
2723 | sizeof(proc_wspace_sep), NULL); | |
2724 | if (err) | |
1da177e4 LT |
2725 | break; |
2726 | if (neg) | |
1da177e4 | 2727 | continue; |
ff9f8a7c | 2728 | val = convmul * val / convdiv; |
1da177e4 LT |
2729 | if ((min && val < *min) || (max && val > *max)) |
2730 | continue; | |
2731 | *i = val; | |
2732 | } else { | |
00b7c339 | 2733 | val = convdiv * (*i) / convmul; |
7833819d | 2734 | if (!first) { |
00b7c339 | 2735 | err = proc_put_char(&buffer, &left, '\t'); |
7833819d CG |
2736 | if (err) |
2737 | break; | |
2738 | } | |
00b7c339 AW |
2739 | err = proc_put_long(&buffer, &left, val, false); |
2740 | if (err) | |
2741 | break; | |
1da177e4 LT |
2742 | } |
2743 | } | |
2744 | ||
00b7c339 AW |
2745 | if (!write && !first && left && !err) |
2746 | err = proc_put_char(&buffer, &left, '\n'); | |
2747 | if (write && !err) | |
70f6cbb6 | 2748 | left -= proc_skip_spaces(&p); |
1da177e4 | 2749 | if (write) { |
70f6cbb6 | 2750 | kfree(kbuf); |
00b7c339 AW |
2751 | if (first) |
2752 | return err ? : -EINVAL; | |
1da177e4 | 2753 | } |
1da177e4 | 2754 | *lenp -= left; |
f4aacea2 | 2755 | out: |
1da177e4 | 2756 | *ppos += *lenp; |
00b7c339 | 2757 | return err; |
1da177e4 LT |
2758 | } |
2759 | ||
d8217f07 | 2760 | static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, |
fcfbd547 KK |
2761 | void __user *buffer, |
2762 | size_t *lenp, loff_t *ppos, | |
2763 | unsigned long convmul, | |
2764 | unsigned long convdiv) | |
2765 | { | |
2766 | return __do_proc_doulongvec_minmax(table->data, table, write, | |
8d65af78 | 2767 | buffer, lenp, ppos, convmul, convdiv); |
fcfbd547 KK |
2768 | } |
2769 | ||
1da177e4 LT |
2770 | /** |
2771 | * proc_doulongvec_minmax - read a vector of long integers with min/max values | |
2772 | * @table: the sysctl table | |
2773 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2774 | * @buffer: the user buffer |
2775 | * @lenp: the size of the user buffer | |
2776 | * @ppos: file position | |
2777 | * | |
2778 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2779 | * values from/to the user buffer, treated as an ASCII string. | |
2780 | * | |
2781 | * This routine will ensure the values are within the range specified by | |
2782 | * table->extra1 (min) and table->extra2 (max). | |
2783 | * | |
2784 | * Returns 0 on success. | |
2785 | */ | |
8d65af78 | 2786 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2787 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2788 | { | |
8d65af78 | 2789 | return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); |
1da177e4 LT |
2790 | } |
2791 | ||
2792 | /** | |
2793 | * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values | |
2794 | * @table: the sysctl table | |
2795 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2796 | * @buffer: the user buffer |
2797 | * @lenp: the size of the user buffer | |
2798 | * @ppos: file position | |
2799 | * | |
2800 | * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long | |
2801 | * values from/to the user buffer, treated as an ASCII string. The values | |
2802 | * are treated as milliseconds, and converted to jiffies when they are stored. | |
2803 | * | |
2804 | * This routine will ensure the values are within the range specified by | |
2805 | * table->extra1 (min) and table->extra2 (max). | |
2806 | * | |
2807 | * Returns 0 on success. | |
2808 | */ | |
d8217f07 | 2809 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
2810 | void __user *buffer, |
2811 | size_t *lenp, loff_t *ppos) | |
2812 | { | |
8d65af78 | 2813 | return do_proc_doulongvec_minmax(table, write, buffer, |
1da177e4 LT |
2814 | lenp, ppos, HZ, 1000l); |
2815 | } | |
2816 | ||
2817 | ||
00b7c339 | 2818 | static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2819 | int *valp, |
2820 | int write, void *data) | |
2821 | { | |
2822 | if (write) { | |
63259457 | 2823 | if (*lvalp > INT_MAX / HZ) |
cba9f33d | 2824 | return 1; |
1da177e4 LT |
2825 | *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); |
2826 | } else { | |
2827 | int val = *valp; | |
2828 | unsigned long lval; | |
2829 | if (val < 0) { | |
00b7c339 | 2830 | *negp = true; |
9a5bc726 | 2831 | lval = -(unsigned long)val; |
1da177e4 | 2832 | } else { |
00b7c339 | 2833 | *negp = false; |
1da177e4 LT |
2834 | lval = (unsigned long)val; |
2835 | } | |
2836 | *lvalp = lval / HZ; | |
2837 | } | |
2838 | return 0; | |
2839 | } | |
2840 | ||
00b7c339 | 2841 | static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2842 | int *valp, |
2843 | int write, void *data) | |
2844 | { | |
2845 | if (write) { | |
cba9f33d BS |
2846 | if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) |
2847 | return 1; | |
1da177e4 LT |
2848 | *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); |
2849 | } else { | |
2850 | int val = *valp; | |
2851 | unsigned long lval; | |
2852 | if (val < 0) { | |
00b7c339 | 2853 | *negp = true; |
9a5bc726 | 2854 | lval = -(unsigned long)val; |
1da177e4 | 2855 | } else { |
00b7c339 | 2856 | *negp = false; |
1da177e4 LT |
2857 | lval = (unsigned long)val; |
2858 | } | |
2859 | *lvalp = jiffies_to_clock_t(lval); | |
2860 | } | |
2861 | return 0; | |
2862 | } | |
2863 | ||
00b7c339 | 2864 | static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, |
1da177e4 LT |
2865 | int *valp, |
2866 | int write, void *data) | |
2867 | { | |
2868 | if (write) { | |
d738ce8f FF |
2869 | unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); |
2870 | ||
2871 | if (jif > INT_MAX) | |
2872 | return 1; | |
2873 | *valp = (int)jif; | |
1da177e4 LT |
2874 | } else { |
2875 | int val = *valp; | |
2876 | unsigned long lval; | |
2877 | if (val < 0) { | |
00b7c339 | 2878 | *negp = true; |
9a5bc726 | 2879 | lval = -(unsigned long)val; |
1da177e4 | 2880 | } else { |
00b7c339 | 2881 | *negp = false; |
1da177e4 LT |
2882 | lval = (unsigned long)val; |
2883 | } | |
2884 | *lvalp = jiffies_to_msecs(lval); | |
2885 | } | |
2886 | return 0; | |
2887 | } | |
2888 | ||
2889 | /** | |
2890 | * proc_dointvec_jiffies - read a vector of integers as seconds | |
2891 | * @table: the sysctl table | |
2892 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2893 | * @buffer: the user buffer |
2894 | * @lenp: the size of the user buffer | |
2895 | * @ppos: file position | |
2896 | * | |
2897 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2898 | * values from/to the user buffer, treated as an ASCII string. | |
2899 | * The values read are assumed to be in seconds, and are converted into | |
2900 | * jiffies. | |
2901 | * | |
2902 | * Returns 0 on success. | |
2903 | */ | |
8d65af78 | 2904 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2905 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2906 | { | |
8d65af78 | 2907 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2908 | do_proc_dointvec_jiffies_conv,NULL); |
2909 | } | |
2910 | ||
2911 | /** | |
2912 | * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds | |
2913 | * @table: the sysctl table | |
2914 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2915 | * @buffer: the user buffer |
2916 | * @lenp: the size of the user buffer | |
1e5d5331 | 2917 | * @ppos: pointer to the file position |
1da177e4 LT |
2918 | * |
2919 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2920 | * values from/to the user buffer, treated as an ASCII string. | |
2921 | * The values read are assumed to be in 1/USER_HZ seconds, and | |
2922 | * are converted into jiffies. | |
2923 | * | |
2924 | * Returns 0 on success. | |
2925 | */ | |
8d65af78 | 2926 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2927 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2928 | { | |
8d65af78 | 2929 | return do_proc_dointvec(table,write,buffer,lenp,ppos, |
1da177e4 LT |
2930 | do_proc_dointvec_userhz_jiffies_conv,NULL); |
2931 | } | |
2932 | ||
2933 | /** | |
2934 | * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds | |
2935 | * @table: the sysctl table | |
2936 | * @write: %TRUE if this is a write to the sysctl file | |
1da177e4 LT |
2937 | * @buffer: the user buffer |
2938 | * @lenp: the size of the user buffer | |
67be2dd1 MW |
2939 | * @ppos: file position |
2940 | * @ppos: the current position in the file | |
1da177e4 LT |
2941 | * |
2942 | * Reads/writes up to table->maxlen/sizeof(unsigned int) integer | |
2943 | * values from/to the user buffer, treated as an ASCII string. | |
2944 | * The values read are assumed to be in 1/1000 seconds, and | |
2945 | * are converted into jiffies. | |
2946 | * | |
2947 | * Returns 0 on success. | |
2948 | */ | |
8d65af78 | 2949 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
2950 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2951 | { | |
8d65af78 | 2952 | return do_proc_dointvec(table, write, buffer, lenp, ppos, |
1da177e4 LT |
2953 | do_proc_dointvec_ms_jiffies_conv, NULL); |
2954 | } | |
2955 | ||
8d65af78 | 2956 | static int proc_do_cad_pid(struct ctl_table *table, int write, |
9ec52099 CLG |
2957 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2958 | { | |
2959 | struct pid *new_pid; | |
2960 | pid_t tmp; | |
2961 | int r; | |
2962 | ||
6c5f3e7b | 2963 | tmp = pid_vnr(cad_pid); |
9ec52099 | 2964 | |
8d65af78 | 2965 | r = __do_proc_dointvec(&tmp, table, write, buffer, |
9ec52099 CLG |
2966 | lenp, ppos, NULL, NULL); |
2967 | if (r || !write) | |
2968 | return r; | |
2969 | ||
2970 | new_pid = find_get_pid(tmp); | |
2971 | if (!new_pid) | |
2972 | return -ESRCH; | |
2973 | ||
2974 | put_pid(xchg(&cad_pid, new_pid)); | |
2975 | return 0; | |
2976 | } | |
2977 | ||
9f977fb7 OP |
2978 | /** |
2979 | * proc_do_large_bitmap - read/write from/to a large bitmap | |
2980 | * @table: the sysctl table | |
2981 | * @write: %TRUE if this is a write to the sysctl file | |
2982 | * @buffer: the user buffer | |
2983 | * @lenp: the size of the user buffer | |
2984 | * @ppos: file position | |
2985 | * | |
2986 | * The bitmap is stored at table->data and the bitmap length (in bits) | |
2987 | * in table->maxlen. | |
2988 | * | |
2989 | * We use a range comma separated format (e.g. 1,3-4,10-10) so that | |
2990 | * large bitmaps may be represented in a compact manner. Writing into | |
2991 | * the file will clear the bitmap then update it with the given input. | |
2992 | * | |
2993 | * Returns 0 on success. | |
2994 | */ | |
2995 | int proc_do_large_bitmap(struct ctl_table *table, int write, | |
2996 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
2997 | { | |
2998 | int err = 0; | |
2999 | bool first = 1; | |
3000 | size_t left = *lenp; | |
3001 | unsigned long bitmap_len = table->maxlen; | |
122ff243 | 3002 | unsigned long *bitmap = *(unsigned long **) table->data; |
9f977fb7 OP |
3003 | unsigned long *tmp_bitmap = NULL; |
3004 | char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; | |
3005 | ||
122ff243 | 3006 | if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { |
9f977fb7 OP |
3007 | *lenp = 0; |
3008 | return 0; | |
3009 | } | |
3010 | ||
3011 | if (write) { | |
70f6cbb6 | 3012 | char *kbuf, *p; |
9f977fb7 OP |
3013 | |
3014 | if (left > PAGE_SIZE - 1) | |
3015 | left = PAGE_SIZE - 1; | |
3016 | ||
70f6cbb6 AV |
3017 | p = kbuf = memdup_user_nul(buffer, left); |
3018 | if (IS_ERR(kbuf)) | |
3019 | return PTR_ERR(kbuf); | |
9f977fb7 OP |
3020 | |
3021 | tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), | |
3022 | GFP_KERNEL); | |
3023 | if (!tmp_bitmap) { | |
70f6cbb6 | 3024 | kfree(kbuf); |
9f977fb7 OP |
3025 | return -ENOMEM; |
3026 | } | |
70f6cbb6 | 3027 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 OP |
3028 | while (!err && left) { |
3029 | unsigned long val_a, val_b; | |
3030 | bool neg; | |
3031 | ||
70f6cbb6 | 3032 | err = proc_get_long(&p, &left, &val_a, &neg, tr_a, |
9f977fb7 OP |
3033 | sizeof(tr_a), &c); |
3034 | if (err) | |
3035 | break; | |
3036 | if (val_a >= bitmap_len || neg) { | |
3037 | err = -EINVAL; | |
3038 | break; | |
3039 | } | |
3040 | ||
3041 | val_b = val_a; | |
3042 | if (left) { | |
70f6cbb6 | 3043 | p++; |
9f977fb7 OP |
3044 | left--; |
3045 | } | |
3046 | ||
3047 | if (c == '-') { | |
70f6cbb6 | 3048 | err = proc_get_long(&p, &left, &val_b, |
9f977fb7 OP |
3049 | &neg, tr_b, sizeof(tr_b), |
3050 | &c); | |
3051 | if (err) | |
3052 | break; | |
3053 | if (val_b >= bitmap_len || neg || | |
3054 | val_a > val_b) { | |
3055 | err = -EINVAL; | |
3056 | break; | |
3057 | } | |
3058 | if (left) { | |
70f6cbb6 | 3059 | p++; |
9f977fb7 OP |
3060 | left--; |
3061 | } | |
3062 | } | |
3063 | ||
5a04cca6 | 3064 | bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); |
9f977fb7 | 3065 | first = 0; |
70f6cbb6 | 3066 | proc_skip_char(&p, &left, '\n'); |
9f977fb7 | 3067 | } |
70f6cbb6 | 3068 | kfree(kbuf); |
9f977fb7 OP |
3069 | } else { |
3070 | unsigned long bit_a, bit_b = 0; | |
3071 | ||
3072 | while (left) { | |
3073 | bit_a = find_next_bit(bitmap, bitmap_len, bit_b); | |
3074 | if (bit_a >= bitmap_len) | |
3075 | break; | |
3076 | bit_b = find_next_zero_bit(bitmap, bitmap_len, | |
3077 | bit_a + 1) - 1; | |
3078 | ||
3079 | if (!first) { | |
3080 | err = proc_put_char(&buffer, &left, ','); | |
3081 | if (err) | |
3082 | break; | |
3083 | } | |
3084 | err = proc_put_long(&buffer, &left, bit_a, false); | |
3085 | if (err) | |
3086 | break; | |
3087 | if (bit_a != bit_b) { | |
3088 | err = proc_put_char(&buffer, &left, '-'); | |
3089 | if (err) | |
3090 | break; | |
3091 | err = proc_put_long(&buffer, &left, bit_b, false); | |
3092 | if (err) | |
3093 | break; | |
3094 | } | |
3095 | ||
3096 | first = 0; bit_b++; | |
3097 | } | |
3098 | if (!err) | |
3099 | err = proc_put_char(&buffer, &left, '\n'); | |
3100 | } | |
3101 | ||
3102 | if (!err) { | |
3103 | if (write) { | |
3104 | if (*ppos) | |
3105 | bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); | |
3106 | else | |
5a04cca6 | 3107 | bitmap_copy(bitmap, tmp_bitmap, bitmap_len); |
9f977fb7 | 3108 | } |
9f977fb7 OP |
3109 | *lenp -= left; |
3110 | *ppos += *lenp; | |
9f977fb7 | 3111 | } |
f9eb2fdd OK |
3112 | |
3113 | kfree(tmp_bitmap); | |
3114 | return err; | |
9f977fb7 OP |
3115 | } |
3116 | ||
55610500 | 3117 | #else /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3118 | |
8d65af78 | 3119 | int proc_dostring(struct ctl_table *table, int write, |
1da177e4 LT |
3120 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3121 | { | |
3122 | return -ENOSYS; | |
3123 | } | |
3124 | ||
8d65af78 | 3125 | int proc_dointvec(struct ctl_table *table, int write, |
1da177e4 | 3126 | void __user *buffer, size_t *lenp, loff_t *ppos) |
1da177e4 LT |
3127 | { |
3128 | return -ENOSYS; | |
3129 | } | |
3130 | ||
e7d316a0 SAK |
3131 | int proc_douintvec(struct ctl_table *table, int write, |
3132 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3133 | { | |
3134 | return -ENOSYS; | |
3135 | } | |
3136 | ||
8d65af78 | 3137 | int proc_dointvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3138 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3139 | { | |
3140 | return -ENOSYS; | |
3141 | } | |
3142 | ||
61d9b56a LR |
3143 | int proc_douintvec_minmax(struct ctl_table *table, int write, |
3144 | void __user *buffer, size_t *lenp, loff_t *ppos) | |
3145 | { | |
3146 | return -ENOSYS; | |
3147 | } | |
3148 | ||
8d65af78 | 3149 | int proc_dointvec_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3150 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3151 | { | |
3152 | return -ENOSYS; | |
3153 | } | |
3154 | ||
8d65af78 | 3155 | int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3156 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3157 | { | |
3158 | return -ENOSYS; | |
3159 | } | |
3160 | ||
8d65af78 | 3161 | int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, |
1da177e4 LT |
3162 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3163 | { | |
3164 | return -ENOSYS; | |
3165 | } | |
3166 | ||
8d65af78 | 3167 | int proc_doulongvec_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3168 | void __user *buffer, size_t *lenp, loff_t *ppos) |
3169 | { | |
3170 | return -ENOSYS; | |
3171 | } | |
3172 | ||
d8217f07 | 3173 | int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, |
1da177e4 LT |
3174 | void __user *buffer, |
3175 | size_t *lenp, loff_t *ppos) | |
3176 | { | |
3177 | return -ENOSYS; | |
3178 | } | |
3179 | ||
3180 | ||
55610500 | 3181 | #endif /* CONFIG_PROC_SYSCTL */ |
1da177e4 | 3182 | |
1da177e4 LT |
3183 | /* |
3184 | * No sense putting this after each symbol definition, twice, | |
3185 | * exception granted :-) | |
3186 | */ | |
3187 | EXPORT_SYMBOL(proc_dointvec); | |
e7d316a0 | 3188 | EXPORT_SYMBOL(proc_douintvec); |
1da177e4 LT |
3189 | EXPORT_SYMBOL(proc_dointvec_jiffies); |
3190 | EXPORT_SYMBOL(proc_dointvec_minmax); | |
61d9b56a | 3191 | EXPORT_SYMBOL_GPL(proc_douintvec_minmax); |
1da177e4 LT |
3192 | EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); |
3193 | EXPORT_SYMBOL(proc_dointvec_ms_jiffies); | |
3194 | EXPORT_SYMBOL(proc_dostring); | |
3195 | EXPORT_SYMBOL(proc_doulongvec_minmax); | |
3196 | EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); |