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 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU) 1209 { 1210 .procname = "panic_on_rcu_stall", 1211 .data = &sysctl_panic_on_rcu_stall, 1212 .maxlen = sizeof(sysctl_panic_on_rcu_stall), 1213 .mode = 0644, 1214 .proc_handler = proc_dointvec_minmax, 1215 .extra1 = &zero, 1216 .extra2 = &one, 1217 }, 1218 #endif 1219 { } 1220 }; 1221 1222 static struct ctl_table vm_table[] = { 1223 { 1224 .procname = "overcommit_memory", 1225 .data = &sysctl_overcommit_memory, 1226 .maxlen = sizeof(sysctl_overcommit_memory), 1227 .mode = 0644, 1228 .proc_handler = proc_dointvec_minmax, 1229 .extra1 = &zero, 1230 .extra2 = &two, 1231 }, 1232 { 1233 .procname = "panic_on_oom", 1234 .data = &sysctl_panic_on_oom, 1235 .maxlen = sizeof(sysctl_panic_on_oom), 1236 .mode = 0644, 1237 .proc_handler = proc_dointvec_minmax, 1238 .extra1 = &zero, 1239 .extra2 = &two, 1240 }, 1241 { 1242 .procname = "oom_kill_allocating_task", 1243 .data = &sysctl_oom_kill_allocating_task, 1244 .maxlen = sizeof(sysctl_oom_kill_allocating_task), 1245 .mode = 0644, 1246 .proc_handler = proc_dointvec, 1247 }, 1248 { 1249 .procname = "oom_dump_tasks", 1250 .data = &sysctl_oom_dump_tasks, 1251 .maxlen = sizeof(sysctl_oom_dump_tasks), 1252 .mode = 0644, 1253 .proc_handler = proc_dointvec, 1254 }, 1255 { 1256 .procname = "overcommit_ratio", 1257 .data = &sysctl_overcommit_ratio, 1258 .maxlen = sizeof(sysctl_overcommit_ratio), 1259 .mode = 0644, 1260 .proc_handler = overcommit_ratio_handler, 1261 }, 1262 { 1263 .procname = "overcommit_kbytes", 1264 .data = &sysctl_overcommit_kbytes, 1265 .maxlen = sizeof(sysctl_overcommit_kbytes), 1266 .mode = 0644, 1267 .proc_handler = overcommit_kbytes_handler, 1268 }, 1269 { 1270 .procname = "page-cluster", 1271 .data = &page_cluster, 1272 .maxlen = sizeof(int), 1273 .mode = 0644, 1274 .proc_handler = proc_dointvec_minmax, 1275 .extra1 = &zero, 1276 }, 1277 { 1278 .procname = "dirty_background_ratio", 1279 .data = &dirty_background_ratio, 1280 .maxlen = sizeof(dirty_background_ratio), 1281 .mode = 0644, 1282 .proc_handler = dirty_background_ratio_handler, 1283 .extra1 = &zero, 1284 .extra2 = &one_hundred, 1285 }, 1286 { 1287 .procname = "dirty_background_bytes", 1288 .data = &dirty_background_bytes, 1289 .maxlen = sizeof(dirty_background_bytes), 1290 .mode = 0644, 1291 .proc_handler = dirty_background_bytes_handler, 1292 .extra1 = &one_ul, 1293 }, 1294 { 1295 .procname = "dirty_ratio", 1296 .data = &vm_dirty_ratio, 1297 .maxlen = sizeof(vm_dirty_ratio), 1298 .mode = 0644, 1299 .proc_handler = dirty_ratio_handler, 1300 .extra1 = &zero, 1301 .extra2 = &one_hundred, 1302 }, 1303 { 1304 .procname = "dirty_bytes", 1305 .data = &vm_dirty_bytes, 1306 .maxlen = sizeof(vm_dirty_bytes), 1307 .mode = 0644, 1308 .proc_handler = dirty_bytes_handler, 1309 .extra1 = &dirty_bytes_min, 1310 }, 1311 { 1312 .procname = "dirty_writeback_centisecs", 1313 .data = &dirty_writeback_interval, 1314 .maxlen = sizeof(dirty_writeback_interval), 1315 .mode = 0644, 1316 .proc_handler = dirty_writeback_centisecs_handler, 1317 }, 1318 { 1319 .procname = "dirty_expire_centisecs", 1320 .data = &dirty_expire_interval, 1321 .maxlen = sizeof(dirty_expire_interval), 1322 .mode = 0644, 1323 .proc_handler = proc_dointvec_minmax, 1324 .extra1 = &zero, 1325 }, 1326 { 1327 .procname = "dirtytime_expire_seconds", 1328 .data = &dirtytime_expire_interval, 1329 .maxlen = sizeof(dirty_expire_interval), 1330 .mode = 0644, 1331 .proc_handler = dirtytime_interval_handler, 1332 .extra1 = &zero, 1333 }, 1334 { 1335 .procname = "nr_pdflush_threads", 1336 .mode = 0444 /* read-only */, 1337 .proc_handler = pdflush_proc_obsolete, 1338 }, 1339 { 1340 .procname = "swappiness", 1341 .data = &vm_swappiness, 1342 .maxlen = sizeof(vm_swappiness), 1343 .mode = 0644, 1344 .proc_handler = proc_dointvec_minmax, 1345 .extra1 = &zero, 1346 .extra2 = &one_hundred, 1347 }, 1348 #ifdef CONFIG_HUGETLB_PAGE 1349 { 1350 .procname = "nr_hugepages", 1351 .data = NULL, 1352 .maxlen = sizeof(unsigned long), 1353 .mode = 0644, 1354 .proc_handler = hugetlb_sysctl_handler, 1355 }, 1356 #ifdef CONFIG_NUMA 1357 { 1358 .procname = "nr_hugepages_mempolicy", 1359 .data = NULL, 1360 .maxlen = sizeof(unsigned long), 1361 .mode = 0644, 1362 .proc_handler = &hugetlb_mempolicy_sysctl_handler, 1363 }, 1364 #endif 1365 { 1366 .procname = "hugetlb_shm_group", 1367 .data = &sysctl_hugetlb_shm_group, 1368 .maxlen = sizeof(gid_t), 1369 .mode = 0644, 1370 .proc_handler = proc_dointvec, 1371 }, 1372 { 1373 .procname = "hugepages_treat_as_movable", 1374 .data = &hugepages_treat_as_movable, 1375 .maxlen = sizeof(int), 1376 .mode = 0644, 1377 .proc_handler = proc_dointvec, 1378 }, 1379 { 1380 .procname = "nr_overcommit_hugepages", 1381 .data = NULL, 1382 .maxlen = sizeof(unsigned long), 1383 .mode = 0644, 1384 .proc_handler = hugetlb_overcommit_handler, 1385 }, 1386 #endif 1387 { 1388 .procname = "lowmem_reserve_ratio", 1389 .data = &sysctl_lowmem_reserve_ratio, 1390 .maxlen = sizeof(sysctl_lowmem_reserve_ratio), 1391 .mode = 0644, 1392 .proc_handler = lowmem_reserve_ratio_sysctl_handler, 1393 }, 1394 { 1395 .procname = "drop_caches", 1396 .data = &sysctl_drop_caches, 1397 .maxlen = sizeof(int), 1398 .mode = 0644, 1399 .proc_handler = drop_caches_sysctl_handler, 1400 .extra1 = &one, 1401 .extra2 = &four, 1402 }, 1403 #ifdef CONFIG_COMPACTION 1404 { 1405 .procname = "compact_memory", 1406 .data = &sysctl_compact_memory, 1407 .maxlen = sizeof(int), 1408 .mode = 0200, 1409 .proc_handler = sysctl_compaction_handler, 1410 }, 1411 { 1412 .procname = "extfrag_threshold", 1413 .data = &sysctl_extfrag_threshold, 1414 .maxlen = sizeof(int), 1415 .mode = 0644, 1416 .proc_handler = sysctl_extfrag_handler, 1417 .extra1 = &min_extfrag_threshold, 1418 .extra2 = &max_extfrag_threshold, 1419 }, 1420 { 1421 .procname = "compact_unevictable_allowed", 1422 .data = &sysctl_compact_unevictable_allowed, 1423 .maxlen = sizeof(int), 1424 .mode = 0644, 1425 .proc_handler = proc_dointvec, 1426 .extra1 = &zero, 1427 .extra2 = &one, 1428 }, 1429 1430 #endif /* CONFIG_COMPACTION */ 1431 { 1432 .procname = "min_free_kbytes", 1433 .data = &min_free_kbytes, 1434 .maxlen = sizeof(min_free_kbytes), 1435 .mode = 0644, 1436 .proc_handler = min_free_kbytes_sysctl_handler, 1437 .extra1 = &zero, 1438 }, 1439 { 1440 .procname = "watermark_scale_factor", 1441 .data = &watermark_scale_factor, 1442 .maxlen = sizeof(watermark_scale_factor), 1443 .mode = 0644, 1444 .proc_handler = watermark_scale_factor_sysctl_handler, 1445 .extra1 = &one, 1446 .extra2 = &one_thousand, 1447 }, 1448 { 1449 .procname = "percpu_pagelist_fraction", 1450 .data = &percpu_pagelist_fraction, 1451 .maxlen = sizeof(percpu_pagelist_fraction), 1452 .mode = 0644, 1453 .proc_handler = percpu_pagelist_fraction_sysctl_handler, 1454 .extra1 = &zero, 1455 }, 1456 #ifdef CONFIG_MMU 1457 { 1458 .procname = "max_map_count", 1459 .data = &sysctl_max_map_count, 1460 .maxlen = sizeof(sysctl_max_map_count), 1461 .mode = 0644, 1462 .proc_handler = proc_dointvec_minmax, 1463 .extra1 = &zero, 1464 }, 1465 #else 1466 { 1467 .procname = "nr_trim_pages", 1468 .data = &sysctl_nr_trim_pages, 1469 .maxlen = sizeof(sysctl_nr_trim_pages), 1470 .mode = 0644, 1471 .proc_handler = proc_dointvec_minmax, 1472 .extra1 = &zero, 1473 }, 1474 #endif 1475 { 1476 .procname = "laptop_mode", 1477 .data = &laptop_mode, 1478 .maxlen = sizeof(laptop_mode), 1479 .mode = 0644, 1480 .proc_handler = proc_dointvec_jiffies, 1481 }, 1482 { 1483 .procname = "block_dump", 1484 .data = &block_dump, 1485 .maxlen = sizeof(block_dump), 1486 .mode = 0644, 1487 .proc_handler = proc_dointvec, 1488 .extra1 = &zero, 1489 }, 1490 { 1491 .procname = "vfs_cache_pressure", 1492 .data = &sysctl_vfs_cache_pressure, 1493 .maxlen = sizeof(sysctl_vfs_cache_pressure), 1494 .mode = 0644, 1495 .proc_handler = proc_dointvec, 1496 .extra1 = &zero, 1497 }, 1498 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT 1499 { 1500 .procname = "legacy_va_layout", 1501 .data = &sysctl_legacy_va_layout, 1502 .maxlen = sizeof(sysctl_legacy_va_layout), 1503 .mode = 0644, 1504 .proc_handler = proc_dointvec, 1505 .extra1 = &zero, 1506 }, 1507 #endif 1508 #ifdef CONFIG_NUMA 1509 { 1510 .procname = "zone_reclaim_mode", 1511 .data = &node_reclaim_mode, 1512 .maxlen = sizeof(node_reclaim_mode), 1513 .mode = 0644, 1514 .proc_handler = proc_dointvec, 1515 .extra1 = &zero, 1516 }, 1517 { 1518 .procname = "min_unmapped_ratio", 1519 .data = &sysctl_min_unmapped_ratio, 1520 .maxlen = sizeof(sysctl_min_unmapped_ratio), 1521 .mode = 0644, 1522 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, 1523 .extra1 = &zero, 1524 .extra2 = &one_hundred, 1525 }, 1526 { 1527 .procname = "min_slab_ratio", 1528 .data = &sysctl_min_slab_ratio, 1529 .maxlen = sizeof(sysctl_min_slab_ratio), 1530 .mode = 0644, 1531 .proc_handler = sysctl_min_slab_ratio_sysctl_handler, 1532 .extra1 = &zero, 1533 .extra2 = &one_hundred, 1534 }, 1535 #endif 1536 #ifdef CONFIG_SMP 1537 { 1538 .procname = "stat_interval", 1539 .data = &sysctl_stat_interval, 1540 .maxlen = sizeof(sysctl_stat_interval), 1541 .mode = 0644, 1542 .proc_handler = proc_dointvec_jiffies, 1543 }, 1544 { 1545 .procname = "stat_refresh", 1546 .data = NULL, 1547 .maxlen = 0, 1548 .mode = 0600, 1549 .proc_handler = vmstat_refresh, 1550 }, 1551 #endif 1552 #ifdef CONFIG_MMU 1553 { 1554 .procname = "mmap_min_addr", 1555 .data = &dac_mmap_min_addr, 1556 .maxlen = sizeof(unsigned long), 1557 .mode = 0644, 1558 .proc_handler = mmap_min_addr_handler, 1559 }, 1560 #endif 1561 #ifdef CONFIG_NUMA 1562 { 1563 .procname = "numa_zonelist_order", 1564 .data = &numa_zonelist_order, 1565 .maxlen = NUMA_ZONELIST_ORDER_LEN, 1566 .mode = 0644, 1567 .proc_handler = numa_zonelist_order_handler, 1568 }, 1569 #endif 1570 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ 1571 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) 1572 { 1573 .procname = "vdso_enabled", 1574 #ifdef CONFIG_X86_32 1575 .data = &vdso32_enabled, 1576 .maxlen = sizeof(vdso32_enabled), 1577 #else 1578 .data = &vdso_enabled, 1579 .maxlen = sizeof(vdso_enabled), 1580 #endif 1581 .mode = 0644, 1582 .proc_handler = proc_dointvec, 1583 .extra1 = &zero, 1584 }, 1585 #endif 1586 #ifdef CONFIG_HIGHMEM 1587 { 1588 .procname = "highmem_is_dirtyable", 1589 .data = &vm_highmem_is_dirtyable, 1590 .maxlen = sizeof(vm_highmem_is_dirtyable), 1591 .mode = 0644, 1592 .proc_handler = proc_dointvec_minmax, 1593 .extra1 = &zero, 1594 .extra2 = &one, 1595 }, 1596 #endif 1597 #ifdef CONFIG_MEMORY_FAILURE 1598 { 1599 .procname = "memory_failure_early_kill", 1600 .data = &sysctl_memory_failure_early_kill, 1601 .maxlen = sizeof(sysctl_memory_failure_early_kill), 1602 .mode = 0644, 1603 .proc_handler = proc_dointvec_minmax, 1604 .extra1 = &zero, 1605 .extra2 = &one, 1606 }, 1607 { 1608 .procname = "memory_failure_recovery", 1609 .data = &sysctl_memory_failure_recovery, 1610 .maxlen = sizeof(sysctl_memory_failure_recovery), 1611 .mode = 0644, 1612 .proc_handler = proc_dointvec_minmax, 1613 .extra1 = &zero, 1614 .extra2 = &one, 1615 }, 1616 #endif 1617 { 1618 .procname = "user_reserve_kbytes", 1619 .data = &sysctl_user_reserve_kbytes, 1620 .maxlen = sizeof(sysctl_user_reserve_kbytes), 1621 .mode = 0644, 1622 .proc_handler = proc_doulongvec_minmax, 1623 }, 1624 { 1625 .procname = "admin_reserve_kbytes", 1626 .data = &sysctl_admin_reserve_kbytes, 1627 .maxlen = sizeof(sysctl_admin_reserve_kbytes), 1628 .mode = 0644, 1629 .proc_handler = proc_doulongvec_minmax, 1630 }, 1631 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS 1632 { 1633 .procname = "mmap_rnd_bits", 1634 .data = &mmap_rnd_bits, 1635 .maxlen = sizeof(mmap_rnd_bits), 1636 .mode = 0600, 1637 .proc_handler = proc_dointvec_minmax, 1638 .extra1 = (void *)&mmap_rnd_bits_min, 1639 .extra2 = (void *)&mmap_rnd_bits_max, 1640 }, 1641 #endif 1642 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS 1643 { 1644 .procname = "mmap_rnd_compat_bits", 1645 .data = &mmap_rnd_compat_bits, 1646 .maxlen = sizeof(mmap_rnd_compat_bits), 1647 .mode = 0600, 1648 .proc_handler = proc_dointvec_minmax, 1649 .extra1 = (void *)&mmap_rnd_compat_bits_min, 1650 .extra2 = (void *)&mmap_rnd_compat_bits_max, 1651 }, 1652 #endif 1653 { } 1654 }; 1655 1656 static struct ctl_table fs_table[] = { 1657 { 1658 .procname = "inode-nr", 1659 .data = &inodes_stat, 1660 .maxlen = 2*sizeof(long), 1661 .mode = 0444, 1662 .proc_handler = proc_nr_inodes, 1663 }, 1664 { 1665 .procname = "inode-state", 1666 .data = &inodes_stat, 1667 .maxlen = 7*sizeof(long), 1668 .mode = 0444, 1669 .proc_handler = proc_nr_inodes, 1670 }, 1671 { 1672 .procname = "file-nr", 1673 .data = &files_stat, 1674 .maxlen = sizeof(files_stat), 1675 .mode = 0444, 1676 .proc_handler = proc_nr_files, 1677 }, 1678 { 1679 .procname = "file-max", 1680 .data = &files_stat.max_files, 1681 .maxlen = sizeof(files_stat.max_files), 1682 .mode = 0644, 1683 .proc_handler = proc_doulongvec_minmax, 1684 }, 1685 { 1686 .procname = "nr_open", 1687 .data = &sysctl_nr_open, 1688 .maxlen = sizeof(int), 1689 .mode = 0644, 1690 .proc_handler = proc_dointvec_minmax, 1691 .extra1 = &sysctl_nr_open_min, 1692 .extra2 = &sysctl_nr_open_max, 1693 }, 1694 { 1695 .procname = "dentry-state", 1696 .data = &dentry_stat, 1697 .maxlen = 6*sizeof(long), 1698 .mode = 0444, 1699 .proc_handler = proc_nr_dentry, 1700 }, 1701 { 1702 .procname = "overflowuid", 1703 .data = &fs_overflowuid, 1704 .maxlen = sizeof(int), 1705 .mode = 0644, 1706 .proc_handler = proc_dointvec_minmax, 1707 .extra1 = &minolduid, 1708 .extra2 = &maxolduid, 1709 }, 1710 { 1711 .procname = "overflowgid", 1712 .data = &fs_overflowgid, 1713 .maxlen = sizeof(int), 1714 .mode = 0644, 1715 .proc_handler = proc_dointvec_minmax, 1716 .extra1 = &minolduid, 1717 .extra2 = &maxolduid, 1718 }, 1719 #ifdef CONFIG_FILE_LOCKING 1720 { 1721 .procname = "leases-enable", 1722 .data = &leases_enable, 1723 .maxlen = sizeof(int), 1724 .mode = 0644, 1725 .proc_handler = proc_dointvec, 1726 }, 1727 #endif 1728 #ifdef CONFIG_DNOTIFY 1729 { 1730 .procname = "dir-notify-enable", 1731 .data = &dir_notify_enable, 1732 .maxlen = sizeof(int), 1733 .mode = 0644, 1734 .proc_handler = proc_dointvec, 1735 }, 1736 #endif 1737 #ifdef CONFIG_MMU 1738 #ifdef CONFIG_FILE_LOCKING 1739 { 1740 .procname = "lease-break-time", 1741 .data = &lease_break_time, 1742 .maxlen = sizeof(int), 1743 .mode = 0644, 1744 .proc_handler = proc_dointvec, 1745 }, 1746 #endif 1747 #ifdef CONFIG_AIO 1748 { 1749 .procname = "aio-nr", 1750 .data = &aio_nr, 1751 .maxlen = sizeof(aio_nr), 1752 .mode = 0444, 1753 .proc_handler = proc_doulongvec_minmax, 1754 }, 1755 { 1756 .procname = "aio-max-nr", 1757 .data = &aio_max_nr, 1758 .maxlen = sizeof(aio_max_nr), 1759 .mode = 0644, 1760 .proc_handler = proc_doulongvec_minmax, 1761 }, 1762 #endif /* CONFIG_AIO */ 1763 #ifdef CONFIG_INOTIFY_USER 1764 { 1765 .procname = "inotify", 1766 .mode = 0555, 1767 .child = inotify_table, 1768 }, 1769 #endif 1770 #ifdef CONFIG_EPOLL 1771 { 1772 .procname = "epoll", 1773 .mode = 0555, 1774 .child = epoll_table, 1775 }, 1776 #endif 1777 #endif 1778 { 1779 .procname = "protected_symlinks", 1780 .data = &sysctl_protected_symlinks, 1781 .maxlen = sizeof(int), 1782 .mode = 0600, 1783 .proc_handler = proc_dointvec_minmax, 1784 .extra1 = &zero, 1785 .extra2 = &one, 1786 }, 1787 { 1788 .procname = "protected_hardlinks", 1789 .data = &sysctl_protected_hardlinks, 1790 .maxlen = sizeof(int), 1791 .mode = 0600, 1792 .proc_handler = proc_dointvec_minmax, 1793 .extra1 = &zero, 1794 .extra2 = &one, 1795 }, 1796 { 1797 .procname = "suid_dumpable", 1798 .data = &suid_dumpable, 1799 .maxlen = sizeof(int), 1800 .mode = 0644, 1801 .proc_handler = proc_dointvec_minmax_coredump, 1802 .extra1 = &zero, 1803 .extra2 = &two, 1804 }, 1805 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) 1806 { 1807 .procname = "binfmt_misc", 1808 .mode = 0555, 1809 .child = sysctl_mount_point, 1810 }, 1811 #endif 1812 { 1813 .procname = "pipe-max-size", 1814 .data = &pipe_max_size, 1815 .maxlen = sizeof(int), 1816 .mode = 0644, 1817 .proc_handler = &pipe_proc_fn, 1818 .extra1 = &pipe_min_size, 1819 }, 1820 { 1821 .procname = "pipe-user-pages-hard", 1822 .data = &pipe_user_pages_hard, 1823 .maxlen = sizeof(pipe_user_pages_hard), 1824 .mode = 0644, 1825 .proc_handler = proc_doulongvec_minmax, 1826 }, 1827 { 1828 .procname = "pipe-user-pages-soft", 1829 .data = &pipe_user_pages_soft, 1830 .maxlen = sizeof(pipe_user_pages_soft), 1831 .mode = 0644, 1832 .proc_handler = proc_doulongvec_minmax, 1833 }, 1834 { } 1835 }; 1836 1837 static struct ctl_table debug_table[] = { 1838 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE 1839 { 1840 .procname = "exception-trace", 1841 .data = &show_unhandled_signals, 1842 .maxlen = sizeof(int), 1843 .mode = 0644, 1844 .proc_handler = proc_dointvec 1845 }, 1846 #endif 1847 #if defined(CONFIG_OPTPROBES) 1848 { 1849 .procname = "kprobes-optimization", 1850 .data = &sysctl_kprobes_optimization, 1851 .maxlen = sizeof(int), 1852 .mode = 0644, 1853 .proc_handler = proc_kprobes_optimization_handler, 1854 .extra1 = &zero, 1855 .extra2 = &one, 1856 }, 1857 #endif 1858 { } 1859 }; 1860 1861 static struct ctl_table dev_table[] = { 1862 { } 1863 }; 1864 1865 int __init sysctl_init(void) 1866 { 1867 struct ctl_table_header *hdr; 1868 1869 hdr = register_sysctl_table(sysctl_base_table); 1870 kmemleak_not_leak(hdr); 1871 return 0; 1872 } 1873 1874 #endif /* CONFIG_SYSCTL */ 1875 1876 /* 1877 * /proc/sys support 1878 */ 1879 1880 #ifdef CONFIG_PROC_SYSCTL 1881 1882 static int _proc_do_string(char *data, int maxlen, int write, 1883 char __user *buffer, 1884 size_t *lenp, loff_t *ppos) 1885 { 1886 size_t len; 1887 char __user *p; 1888 char c; 1889 1890 if (!data || !maxlen || !*lenp) { 1891 *lenp = 0; 1892 return 0; 1893 } 1894 1895 if (write) { 1896 if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { 1897 /* Only continue writes not past the end of buffer. */ 1898 len = strlen(data); 1899 if (len > maxlen - 1) 1900 len = maxlen - 1; 1901 1902 if (*ppos > len) 1903 return 0; 1904 len = *ppos; 1905 } else { 1906 /* Start writing from beginning of buffer. */ 1907 len = 0; 1908 } 1909 1910 *ppos += *lenp; 1911 p = buffer; 1912 while ((p - buffer) < *lenp && len < maxlen - 1) { 1913 if (get_user(c, p++)) 1914 return -EFAULT; 1915 if (c == 0 || c == '\n') 1916 break; 1917 data[len++] = c; 1918 } 1919 data[len] = 0; 1920 } else { 1921 len = strlen(data); 1922 if (len > maxlen) 1923 len = maxlen; 1924 1925 if (*ppos > len) { 1926 *lenp = 0; 1927 return 0; 1928 } 1929 1930 data += *ppos; 1931 len -= *ppos; 1932 1933 if (len > *lenp) 1934 len = *lenp; 1935 if (len) 1936 if (copy_to_user(buffer, data, len)) 1937 return -EFAULT; 1938 if (len < *lenp) { 1939 if (put_user('\n', buffer + len)) 1940 return -EFAULT; 1941 len++; 1942 } 1943 *lenp = len; 1944 *ppos += len; 1945 } 1946 return 0; 1947 } 1948 1949 static void warn_sysctl_write(struct ctl_table *table) 1950 { 1951 pr_warn_once("%s wrote to %s when file position was not 0!\n" 1952 "This will not be supported in the future. To silence this\n" 1953 "warning, set kernel.sysctl_writes_strict = -1\n", 1954 current->comm, table->procname); 1955 } 1956 1957 /** 1958 * proc_dostring - read a string sysctl 1959 * @table: the sysctl table 1960 * @write: %TRUE if this is a write to the sysctl file 1961 * @buffer: the user buffer 1962 * @lenp: the size of the user buffer 1963 * @ppos: file position 1964 * 1965 * Reads/writes a string from/to the user buffer. If the kernel 1966 * buffer provided is not large enough to hold the string, the 1967 * string is truncated. The copied string is %NULL-terminated. 1968 * If the string is being read by the user process, it is copied 1969 * and a newline '\n' is added. It is truncated if the buffer is 1970 * not large enough. 1971 * 1972 * Returns 0 on success. 1973 */ 1974 int proc_dostring(struct ctl_table *table, int write, 1975 void __user *buffer, size_t *lenp, loff_t *ppos) 1976 { 1977 if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) 1978 warn_sysctl_write(table); 1979 1980 return _proc_do_string((char *)(table->data), table->maxlen, write, 1981 (char __user *)buffer, lenp, ppos); 1982 } 1983 1984 static size_t proc_skip_spaces(char **buf) 1985 { 1986 size_t ret; 1987 char *tmp = skip_spaces(*buf); 1988 ret = tmp - *buf; 1989 *buf = tmp; 1990 return ret; 1991 } 1992 1993 static void proc_skip_char(char **buf, size_t *size, const char v) 1994 { 1995 while (*size) { 1996 if (**buf != v) 1997 break; 1998 (*size)--; 1999 (*buf)++; 2000 } 2001 } 2002 2003 #define TMPBUFLEN 22 2004 /** 2005 * proc_get_long - reads an ASCII formatted integer from a user buffer 2006 * 2007 * @buf: a kernel buffer 2008 * @size: size of the kernel buffer 2009 * @val: this is where the number will be stored 2010 * @neg: set to %TRUE if number is negative 2011 * @perm_tr: a vector which contains the allowed trailers 2012 * @perm_tr_len: size of the perm_tr vector 2013 * @tr: pointer to store the trailer character 2014 * 2015 * In case of success %0 is returned and @buf and @size are updated with 2016 * the amount of bytes read. If @tr is non-NULL and a trailing 2017 * character exists (size is non-zero after returning from this 2018 * function), @tr is updated with the trailing character. 2019 */ 2020 static int proc_get_long(char **buf, size_t *size, 2021 unsigned long *val, bool *neg, 2022 const char *perm_tr, unsigned perm_tr_len, char *tr) 2023 { 2024 int len; 2025 char *p, tmp[TMPBUFLEN]; 2026 2027 if (!*size) 2028 return -EINVAL; 2029 2030 len = *size; 2031 if (len > TMPBUFLEN - 1) 2032 len = TMPBUFLEN - 1; 2033 2034 memcpy(tmp, *buf, len); 2035 2036 tmp[len] = 0; 2037 p = tmp; 2038 if (*p == '-' && *size > 1) { 2039 *neg = true; 2040 p++; 2041 } else 2042 *neg = false; 2043 if (!isdigit(*p)) 2044 return -EINVAL; 2045 2046 *val = simple_strtoul(p, &p, 0); 2047 2048 len = p - tmp; 2049 2050 /* We don't know if the next char is whitespace thus we may accept 2051 * invalid integers (e.g. 1234...a) or two integers instead of one 2052 * (e.g. 123...1). So lets not allow such large numbers. */ 2053 if (len == TMPBUFLEN - 1) 2054 return -EINVAL; 2055 2056 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) 2057 return -EINVAL; 2058 2059 if (tr && (len < *size)) 2060 *tr = *p; 2061 2062 *buf += len; 2063 *size -= len; 2064 2065 return 0; 2066 } 2067 2068 /** 2069 * proc_put_long - converts an integer to a decimal ASCII formatted string 2070 * 2071 * @buf: the user buffer 2072 * @size: the size of the user buffer 2073 * @val: the integer to be converted 2074 * @neg: sign of the number, %TRUE for negative 2075 * 2076 * In case of success %0 is returned and @buf and @size are updated with 2077 * the amount of bytes written. 2078 */ 2079 static int proc_put_long(void __user **buf, size_t *size, unsigned long val, 2080 bool neg) 2081 { 2082 int len; 2083 char tmp[TMPBUFLEN], *p = tmp; 2084 2085 sprintf(p, "%s%lu", neg ? "-" : "", val); 2086 len = strlen(tmp); 2087 if (len > *size) 2088 len = *size; 2089 if (copy_to_user(*buf, tmp, len)) 2090 return -EFAULT; 2091 *size -= len; 2092 *buf += len; 2093 return 0; 2094 } 2095 #undef TMPBUFLEN 2096 2097 static int proc_put_char(void __user **buf, size_t *size, char c) 2098 { 2099 if (*size) { 2100 char __user **buffer = (char __user **)buf; 2101 if (put_user(c, *buffer)) 2102 return -EFAULT; 2103 (*size)--, (*buffer)++; 2104 *buf = *buffer; 2105 } 2106 return 0; 2107 } 2108 2109 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, 2110 int *valp, 2111 int write, void *data) 2112 { 2113 if (write) { 2114 if (*negp) { 2115 if (*lvalp > (unsigned long) INT_MAX + 1) 2116 return -EINVAL; 2117 *valp = -*lvalp; 2118 } else { 2119 if (*lvalp > (unsigned long) INT_MAX) 2120 return -EINVAL; 2121 *valp = *lvalp; 2122 } 2123 } else { 2124 int val = *valp; 2125 if (val < 0) { 2126 *negp = true; 2127 *lvalp = -(unsigned long)val; 2128 } else { 2129 *negp = false; 2130 *lvalp = (unsigned long)val; 2131 } 2132 } 2133 return 0; 2134 } 2135 2136 static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; 2137 2138 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, 2139 int write, void __user *buffer, 2140 size_t *lenp, loff_t *ppos, 2141 int (*conv)(bool *negp, unsigned long *lvalp, int *valp, 2142 int write, void *data), 2143 void *data) 2144 { 2145 int *i, vleft, first = 1, err = 0; 2146 size_t left; 2147 char *kbuf = NULL, *p; 2148 2149 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { 2150 *lenp = 0; 2151 return 0; 2152 } 2153 2154 i = (int *) tbl_data; 2155 vleft = table->maxlen / sizeof(*i); 2156 left = *lenp; 2157 2158 if (!conv) 2159 conv = do_proc_dointvec_conv; 2160 2161 if (write) { 2162 if (*ppos) { 2163 switch (sysctl_writes_strict) { 2164 case SYSCTL_WRITES_STRICT: 2165 goto out; 2166 case SYSCTL_WRITES_WARN: 2167 warn_sysctl_write(table); 2168 break; 2169 default: 2170 break; 2171 } 2172 } 2173 2174 if (left > PAGE_SIZE - 1) 2175 left = PAGE_SIZE - 1; 2176 p = kbuf = memdup_user_nul(buffer, left); 2177 if (IS_ERR(kbuf)) 2178 return PTR_ERR(kbuf); 2179 } 2180 2181 for (; left && vleft--; i++, first=0) { 2182 unsigned long lval; 2183 bool neg; 2184 2185 if (write) { 2186 left -= proc_skip_spaces(&p); 2187 2188 if (!left) 2189 break; 2190 err = proc_get_long(&p, &left, &lval, &neg, 2191 proc_wspace_sep, 2192 sizeof(proc_wspace_sep), NULL); 2193 if (err) 2194 break; 2195 if (conv(&neg, &lval, i, 1, data)) { 2196 err = -EINVAL; 2197 break; 2198 } 2199 } else { 2200 if (conv(&neg, &lval, i, 0, data)) { 2201 err = -EINVAL; 2202 break; 2203 } 2204 if (!first) 2205 err = proc_put_char(&buffer, &left, '\t'); 2206 if (err) 2207 break; 2208 err = proc_put_long(&buffer, &left, lval, neg); 2209 if (err) 2210 break; 2211 } 2212 } 2213 2214 if (!write && !first && left && !err) 2215 err = proc_put_char(&buffer, &left, '\n'); 2216 if (write && !err && left) 2217 left -= proc_skip_spaces(&p); 2218 if (write) { 2219 kfree(kbuf); 2220 if (first) 2221 return err ? : -EINVAL; 2222 } 2223 *lenp -= left; 2224 out: 2225 *ppos += *lenp; 2226 return err; 2227 } 2228 2229 static int do_proc_dointvec(struct ctl_table *table, int write, 2230 void __user *buffer, size_t *lenp, loff_t *ppos, 2231 int (*conv)(bool *negp, unsigned long *lvalp, int *valp, 2232 int write, void *data), 2233 void *data) 2234 { 2235 return __do_proc_dointvec(table->data, table, write, 2236 buffer, lenp, ppos, conv, data); 2237 } 2238 2239 /** 2240 * proc_dointvec - read a vector of integers 2241 * @table: the sysctl table 2242 * @write: %TRUE if this is a write to the sysctl file 2243 * @buffer: the user buffer 2244 * @lenp: the size of the user buffer 2245 * @ppos: file position 2246 * 2247 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2248 * values from/to the user buffer, treated as an ASCII string. 2249 * 2250 * Returns 0 on success. 2251 */ 2252 int proc_dointvec(struct ctl_table *table, int write, 2253 void __user *buffer, size_t *lenp, loff_t *ppos) 2254 { 2255 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2256 NULL,NULL); 2257 } 2258 2259 /* 2260 * Taint values can only be increased 2261 * This means we can safely use a temporary. 2262 */ 2263 static int proc_taint(struct ctl_table *table, int write, 2264 void __user *buffer, size_t *lenp, loff_t *ppos) 2265 { 2266 struct ctl_table t; 2267 unsigned long tmptaint = get_taint(); 2268 int err; 2269 2270 if (write && !capable(CAP_SYS_ADMIN)) 2271 return -EPERM; 2272 2273 t = *table; 2274 t.data = &tmptaint; 2275 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); 2276 if (err < 0) 2277 return err; 2278 2279 if (write) { 2280 /* 2281 * Poor man's atomic or. Not worth adding a primitive 2282 * to everyone's atomic.h for this 2283 */ 2284 int i; 2285 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { 2286 if ((tmptaint >> i) & 1) 2287 add_taint(i, LOCKDEP_STILL_OK); 2288 } 2289 } 2290 2291 return err; 2292 } 2293 2294 #ifdef CONFIG_PRINTK 2295 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, 2296 void __user *buffer, size_t *lenp, loff_t *ppos) 2297 { 2298 if (write && !capable(CAP_SYS_ADMIN)) 2299 return -EPERM; 2300 2301 return proc_dointvec_minmax(table, write, buffer, lenp, ppos); 2302 } 2303 #endif 2304 2305 struct do_proc_dointvec_minmax_conv_param { 2306 int *min; 2307 int *max; 2308 }; 2309 2310 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, 2311 int *valp, 2312 int write, void *data) 2313 { 2314 struct do_proc_dointvec_minmax_conv_param *param = data; 2315 if (write) { 2316 int val = *negp ? -*lvalp : *lvalp; 2317 if ((param->min && *param->min > val) || 2318 (param->max && *param->max < val)) 2319 return -EINVAL; 2320 *valp = val; 2321 } else { 2322 int val = *valp; 2323 if (val < 0) { 2324 *negp = true; 2325 *lvalp = -(unsigned long)val; 2326 } else { 2327 *negp = false; 2328 *lvalp = (unsigned long)val; 2329 } 2330 } 2331 return 0; 2332 } 2333 2334 /** 2335 * proc_dointvec_minmax - read a vector of integers with min/max values 2336 * @table: the sysctl table 2337 * @write: %TRUE if this is a write to the sysctl file 2338 * @buffer: the user buffer 2339 * @lenp: the size of the user buffer 2340 * @ppos: file position 2341 * 2342 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2343 * values from/to the user buffer, treated as an ASCII string. 2344 * 2345 * This routine will ensure the values are within the range specified by 2346 * table->extra1 (min) and table->extra2 (max). 2347 * 2348 * Returns 0 on success. 2349 */ 2350 int proc_dointvec_minmax(struct ctl_table *table, int write, 2351 void __user *buffer, size_t *lenp, loff_t *ppos) 2352 { 2353 struct do_proc_dointvec_minmax_conv_param param = { 2354 .min = (int *) table->extra1, 2355 .max = (int *) table->extra2, 2356 }; 2357 return do_proc_dointvec(table, write, buffer, lenp, ppos, 2358 do_proc_dointvec_minmax_conv, ¶m); 2359 } 2360 2361 static void validate_coredump_safety(void) 2362 { 2363 #ifdef CONFIG_COREDUMP 2364 if (suid_dumpable == SUID_DUMP_ROOT && 2365 core_pattern[0] != '/' && core_pattern[0] != '|') { 2366 printk(KERN_WARNING "Unsafe core_pattern used with "\ 2367 "suid_dumpable=2. Pipe handler or fully qualified "\ 2368 "core dump path required.\n"); 2369 } 2370 #endif 2371 } 2372 2373 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, 2374 void __user *buffer, size_t *lenp, loff_t *ppos) 2375 { 2376 int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); 2377 if (!error) 2378 validate_coredump_safety(); 2379 return error; 2380 } 2381 2382 #ifdef CONFIG_COREDUMP 2383 static int proc_dostring_coredump(struct ctl_table *table, int write, 2384 void __user *buffer, size_t *lenp, loff_t *ppos) 2385 { 2386 int error = proc_dostring(table, write, buffer, lenp, ppos); 2387 if (!error) 2388 validate_coredump_safety(); 2389 return error; 2390 } 2391 #endif 2392 2393 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, 2394 void __user *buffer, 2395 size_t *lenp, loff_t *ppos, 2396 unsigned long convmul, 2397 unsigned long convdiv) 2398 { 2399 unsigned long *i, *min, *max; 2400 int vleft, first = 1, err = 0; 2401 size_t left; 2402 char *kbuf = NULL, *p; 2403 2404 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { 2405 *lenp = 0; 2406 return 0; 2407 } 2408 2409 i = (unsigned long *) data; 2410 min = (unsigned long *) table->extra1; 2411 max = (unsigned long *) table->extra2; 2412 vleft = table->maxlen / sizeof(unsigned long); 2413 left = *lenp; 2414 2415 if (write) { 2416 if (*ppos) { 2417 switch (sysctl_writes_strict) { 2418 case SYSCTL_WRITES_STRICT: 2419 goto out; 2420 case SYSCTL_WRITES_WARN: 2421 warn_sysctl_write(table); 2422 break; 2423 default: 2424 break; 2425 } 2426 } 2427 2428 if (left > PAGE_SIZE - 1) 2429 left = PAGE_SIZE - 1; 2430 p = kbuf = memdup_user_nul(buffer, left); 2431 if (IS_ERR(kbuf)) 2432 return PTR_ERR(kbuf); 2433 } 2434 2435 for (; left && vleft--; i++, first = 0) { 2436 unsigned long val; 2437 2438 if (write) { 2439 bool neg; 2440 2441 left -= proc_skip_spaces(&p); 2442 2443 err = proc_get_long(&p, &left, &val, &neg, 2444 proc_wspace_sep, 2445 sizeof(proc_wspace_sep), NULL); 2446 if (err) 2447 break; 2448 if (neg) 2449 continue; 2450 if ((min && val < *min) || (max && val > *max)) 2451 continue; 2452 *i = val; 2453 } else { 2454 val = convdiv * (*i) / convmul; 2455 if (!first) { 2456 err = proc_put_char(&buffer, &left, '\t'); 2457 if (err) 2458 break; 2459 } 2460 err = proc_put_long(&buffer, &left, val, false); 2461 if (err) 2462 break; 2463 } 2464 } 2465 2466 if (!write && !first && left && !err) 2467 err = proc_put_char(&buffer, &left, '\n'); 2468 if (write && !err) 2469 left -= proc_skip_spaces(&p); 2470 if (write) { 2471 kfree(kbuf); 2472 if (first) 2473 return err ? : -EINVAL; 2474 } 2475 *lenp -= left; 2476 out: 2477 *ppos += *lenp; 2478 return err; 2479 } 2480 2481 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, 2482 void __user *buffer, 2483 size_t *lenp, loff_t *ppos, 2484 unsigned long convmul, 2485 unsigned long convdiv) 2486 { 2487 return __do_proc_doulongvec_minmax(table->data, table, write, 2488 buffer, lenp, ppos, convmul, convdiv); 2489 } 2490 2491 /** 2492 * proc_doulongvec_minmax - read a vector of long integers with min/max values 2493 * @table: the sysctl table 2494 * @write: %TRUE if this is a write to the sysctl file 2495 * @buffer: the user buffer 2496 * @lenp: the size of the user buffer 2497 * @ppos: file position 2498 * 2499 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long 2500 * values from/to the user buffer, treated as an ASCII string. 2501 * 2502 * This routine will ensure the values are within the range specified by 2503 * table->extra1 (min) and table->extra2 (max). 2504 * 2505 * Returns 0 on success. 2506 */ 2507 int proc_doulongvec_minmax(struct ctl_table *table, int write, 2508 void __user *buffer, size_t *lenp, loff_t *ppos) 2509 { 2510 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); 2511 } 2512 2513 /** 2514 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values 2515 * @table: the sysctl table 2516 * @write: %TRUE if this is a write to the sysctl file 2517 * @buffer: the user buffer 2518 * @lenp: the size of the user buffer 2519 * @ppos: file position 2520 * 2521 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long 2522 * values from/to the user buffer, treated as an ASCII string. The values 2523 * are treated as milliseconds, and converted to jiffies when they are stored. 2524 * 2525 * This routine will ensure the values are within the range specified by 2526 * table->extra1 (min) and table->extra2 (max). 2527 * 2528 * Returns 0 on success. 2529 */ 2530 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, 2531 void __user *buffer, 2532 size_t *lenp, loff_t *ppos) 2533 { 2534 return do_proc_doulongvec_minmax(table, write, buffer, 2535 lenp, ppos, HZ, 1000l); 2536 } 2537 2538 2539 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, 2540 int *valp, 2541 int write, void *data) 2542 { 2543 if (write) { 2544 if (*lvalp > LONG_MAX / HZ) 2545 return 1; 2546 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); 2547 } else { 2548 int val = *valp; 2549 unsigned long lval; 2550 if (val < 0) { 2551 *negp = true; 2552 lval = -(unsigned long)val; 2553 } else { 2554 *negp = false; 2555 lval = (unsigned long)val; 2556 } 2557 *lvalp = lval / HZ; 2558 } 2559 return 0; 2560 } 2561 2562 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, 2563 int *valp, 2564 int write, void *data) 2565 { 2566 if (write) { 2567 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) 2568 return 1; 2569 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); 2570 } else { 2571 int val = *valp; 2572 unsigned long lval; 2573 if (val < 0) { 2574 *negp = true; 2575 lval = -(unsigned long)val; 2576 } else { 2577 *negp = false; 2578 lval = (unsigned long)val; 2579 } 2580 *lvalp = jiffies_to_clock_t(lval); 2581 } 2582 return 0; 2583 } 2584 2585 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, 2586 int *valp, 2587 int write, void *data) 2588 { 2589 if (write) { 2590 unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); 2591 2592 if (jif > INT_MAX) 2593 return 1; 2594 *valp = (int)jif; 2595 } else { 2596 int val = *valp; 2597 unsigned long lval; 2598 if (val < 0) { 2599 *negp = true; 2600 lval = -(unsigned long)val; 2601 } else { 2602 *negp = false; 2603 lval = (unsigned long)val; 2604 } 2605 *lvalp = jiffies_to_msecs(lval); 2606 } 2607 return 0; 2608 } 2609 2610 /** 2611 * proc_dointvec_jiffies - read a vector of integers as seconds 2612 * @table: the sysctl table 2613 * @write: %TRUE if this is a write to the sysctl file 2614 * @buffer: the user buffer 2615 * @lenp: the size of the user buffer 2616 * @ppos: file position 2617 * 2618 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2619 * values from/to the user buffer, treated as an ASCII string. 2620 * The values read are assumed to be in seconds, and are converted into 2621 * jiffies. 2622 * 2623 * Returns 0 on success. 2624 */ 2625 int proc_dointvec_jiffies(struct ctl_table *table, int write, 2626 void __user *buffer, size_t *lenp, loff_t *ppos) 2627 { 2628 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2629 do_proc_dointvec_jiffies_conv,NULL); 2630 } 2631 2632 /** 2633 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds 2634 * @table: the sysctl table 2635 * @write: %TRUE if this is a write to the sysctl file 2636 * @buffer: the user buffer 2637 * @lenp: the size of the user buffer 2638 * @ppos: pointer to the file position 2639 * 2640 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2641 * values from/to the user buffer, treated as an ASCII string. 2642 * The values read are assumed to be in 1/USER_HZ seconds, and 2643 * are converted into jiffies. 2644 * 2645 * Returns 0 on success. 2646 */ 2647 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, 2648 void __user *buffer, size_t *lenp, loff_t *ppos) 2649 { 2650 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2651 do_proc_dointvec_userhz_jiffies_conv,NULL); 2652 } 2653 2654 /** 2655 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds 2656 * @table: the sysctl table 2657 * @write: %TRUE if this is a write to the sysctl file 2658 * @buffer: the user buffer 2659 * @lenp: the size of the user buffer 2660 * @ppos: file position 2661 * @ppos: the current position in the file 2662 * 2663 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2664 * values from/to the user buffer, treated as an ASCII string. 2665 * The values read are assumed to be in 1/1000 seconds, and 2666 * are converted into jiffies. 2667 * 2668 * Returns 0 on success. 2669 */ 2670 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, 2671 void __user *buffer, size_t *lenp, loff_t *ppos) 2672 { 2673 return do_proc_dointvec(table, write, buffer, lenp, ppos, 2674 do_proc_dointvec_ms_jiffies_conv, NULL); 2675 } 2676 2677 static int proc_do_cad_pid(struct ctl_table *table, int write, 2678 void __user *buffer, size_t *lenp, loff_t *ppos) 2679 { 2680 struct pid *new_pid; 2681 pid_t tmp; 2682 int r; 2683 2684 tmp = pid_vnr(cad_pid); 2685 2686 r = __do_proc_dointvec(&tmp, table, write, buffer, 2687 lenp, ppos, NULL, NULL); 2688 if (r || !write) 2689 return r; 2690 2691 new_pid = find_get_pid(tmp); 2692 if (!new_pid) 2693 return -ESRCH; 2694 2695 put_pid(xchg(&cad_pid, new_pid)); 2696 return 0; 2697 } 2698 2699 /** 2700 * proc_do_large_bitmap - read/write from/to a large bitmap 2701 * @table: the sysctl table 2702 * @write: %TRUE if this is a write to the sysctl file 2703 * @buffer: the user buffer 2704 * @lenp: the size of the user buffer 2705 * @ppos: file position 2706 * 2707 * The bitmap is stored at table->data and the bitmap length (in bits) 2708 * in table->maxlen. 2709 * 2710 * We use a range comma separated format (e.g. 1,3-4,10-10) so that 2711 * large bitmaps may be represented in a compact manner. Writing into 2712 * the file will clear the bitmap then update it with the given input. 2713 * 2714 * Returns 0 on success. 2715 */ 2716 int proc_do_large_bitmap(struct ctl_table *table, int write, 2717 void __user *buffer, size_t *lenp, loff_t *ppos) 2718 { 2719 int err = 0; 2720 bool first = 1; 2721 size_t left = *lenp; 2722 unsigned long bitmap_len = table->maxlen; 2723 unsigned long *bitmap = *(unsigned long **) table->data; 2724 unsigned long *tmp_bitmap = NULL; 2725 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; 2726 2727 if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { 2728 *lenp = 0; 2729 return 0; 2730 } 2731 2732 if (write) { 2733 char *kbuf, *p; 2734 2735 if (left > PAGE_SIZE - 1) 2736 left = PAGE_SIZE - 1; 2737 2738 p = kbuf = memdup_user_nul(buffer, left); 2739 if (IS_ERR(kbuf)) 2740 return PTR_ERR(kbuf); 2741 2742 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), 2743 GFP_KERNEL); 2744 if (!tmp_bitmap) { 2745 kfree(kbuf); 2746 return -ENOMEM; 2747 } 2748 proc_skip_char(&p, &left, '\n'); 2749 while (!err && left) { 2750 unsigned long val_a, val_b; 2751 bool neg; 2752 2753 err = proc_get_long(&p, &left, &val_a, &neg, tr_a, 2754 sizeof(tr_a), &c); 2755 if (err) 2756 break; 2757 if (val_a >= bitmap_len || neg) { 2758 err = -EINVAL; 2759 break; 2760 } 2761 2762 val_b = val_a; 2763 if (left) { 2764 p++; 2765 left--; 2766 } 2767 2768 if (c == '-') { 2769 err = proc_get_long(&p, &left, &val_b, 2770 &neg, tr_b, sizeof(tr_b), 2771 &c); 2772 if (err) 2773 break; 2774 if (val_b >= bitmap_len || neg || 2775 val_a > val_b) { 2776 err = -EINVAL; 2777 break; 2778 } 2779 if (left) { 2780 p++; 2781 left--; 2782 } 2783 } 2784 2785 bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); 2786 first = 0; 2787 proc_skip_char(&p, &left, '\n'); 2788 } 2789 kfree(kbuf); 2790 } else { 2791 unsigned long bit_a, bit_b = 0; 2792 2793 while (left) { 2794 bit_a = find_next_bit(bitmap, bitmap_len, bit_b); 2795 if (bit_a >= bitmap_len) 2796 break; 2797 bit_b = find_next_zero_bit(bitmap, bitmap_len, 2798 bit_a + 1) - 1; 2799 2800 if (!first) { 2801 err = proc_put_char(&buffer, &left, ','); 2802 if (err) 2803 break; 2804 } 2805 err = proc_put_long(&buffer, &left, bit_a, false); 2806 if (err) 2807 break; 2808 if (bit_a != bit_b) { 2809 err = proc_put_char(&buffer, &left, '-'); 2810 if (err) 2811 break; 2812 err = proc_put_long(&buffer, &left, bit_b, false); 2813 if (err) 2814 break; 2815 } 2816 2817 first = 0; bit_b++; 2818 } 2819 if (!err) 2820 err = proc_put_char(&buffer, &left, '\n'); 2821 } 2822 2823 if (!err) { 2824 if (write) { 2825 if (*ppos) 2826 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); 2827 else 2828 bitmap_copy(bitmap, tmp_bitmap, bitmap_len); 2829 } 2830 kfree(tmp_bitmap); 2831 *lenp -= left; 2832 *ppos += *lenp; 2833 return 0; 2834 } else { 2835 kfree(tmp_bitmap); 2836 return err; 2837 } 2838 } 2839 2840 #else /* CONFIG_PROC_SYSCTL */ 2841 2842 int proc_dostring(struct ctl_table *table, int write, 2843 void __user *buffer, size_t *lenp, loff_t *ppos) 2844 { 2845 return -ENOSYS; 2846 } 2847 2848 int proc_dointvec(struct ctl_table *table, int write, 2849 void __user *buffer, size_t *lenp, loff_t *ppos) 2850 { 2851 return -ENOSYS; 2852 } 2853 2854 int proc_dointvec_minmax(struct ctl_table *table, int write, 2855 void __user *buffer, size_t *lenp, loff_t *ppos) 2856 { 2857 return -ENOSYS; 2858 } 2859 2860 int proc_dointvec_jiffies(struct ctl_table *table, int write, 2861 void __user *buffer, size_t *lenp, loff_t *ppos) 2862 { 2863 return -ENOSYS; 2864 } 2865 2866 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, 2867 void __user *buffer, size_t *lenp, loff_t *ppos) 2868 { 2869 return -ENOSYS; 2870 } 2871 2872 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, 2873 void __user *buffer, size_t *lenp, loff_t *ppos) 2874 { 2875 return -ENOSYS; 2876 } 2877 2878 int proc_doulongvec_minmax(struct ctl_table *table, int write, 2879 void __user *buffer, size_t *lenp, loff_t *ppos) 2880 { 2881 return -ENOSYS; 2882 } 2883 2884 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, 2885 void __user *buffer, 2886 size_t *lenp, loff_t *ppos) 2887 { 2888 return -ENOSYS; 2889 } 2890 2891 2892 #endif /* CONFIG_PROC_SYSCTL */ 2893 2894 /* 2895 * No sense putting this after each symbol definition, twice, 2896 * exception granted :-) 2897 */ 2898 EXPORT_SYMBOL(proc_dointvec); 2899 EXPORT_SYMBOL(proc_dointvec_jiffies); 2900 EXPORT_SYMBOL(proc_dointvec_minmax); 2901 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); 2902 EXPORT_SYMBOL(proc_dointvec_ms_jiffies); 2903 EXPORT_SYMBOL(proc_dostring); 2904 EXPORT_SYMBOL(proc_doulongvec_minmax); 2905 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); 2906