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