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