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 133 134 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ 135 static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; 136 137 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ 138 static int maxolduid = 65535; 139 static int minolduid; 140 141 static int ngroups_max = NGROUPS_MAX; 142 static const int cap_last_cap = CAP_LAST_CAP; 143 144 /*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */ 145 #ifdef CONFIG_DETECT_HUNG_TASK 146 static unsigned long hung_task_timeout_max = (LONG_MAX/HZ); 147 #endif 148 149 #ifdef CONFIG_INOTIFY_USER 150 #include <linux/inotify.h> 151 #endif 152 #ifdef CONFIG_SPARC 153 #endif 154 155 #ifdef __hppa__ 156 extern int pwrsw_enabled; 157 #endif 158 159 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW 160 extern int unaligned_enabled; 161 #endif 162 163 #ifdef CONFIG_IA64 164 extern int unaligned_dump_stack; 165 #endif 166 167 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN 168 extern int no_unaligned_warning; 169 #endif 170 171 #ifdef CONFIG_PROC_SYSCTL 172 173 #define SYSCTL_WRITES_LEGACY -1 174 #define SYSCTL_WRITES_WARN 0 175 #define SYSCTL_WRITES_STRICT 1 176 177 static int sysctl_writes_strict = SYSCTL_WRITES_STRICT; 178 179 static int proc_do_cad_pid(struct ctl_table *table, int write, 180 void __user *buffer, size_t *lenp, loff_t *ppos); 181 static int proc_taint(struct ctl_table *table, int write, 182 void __user *buffer, size_t *lenp, loff_t *ppos); 183 #endif 184 185 #ifdef CONFIG_PRINTK 186 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, 187 void __user *buffer, size_t *lenp, loff_t *ppos); 188 #endif 189 190 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, 191 void __user *buffer, size_t *lenp, loff_t *ppos); 192 #ifdef CONFIG_COREDUMP 193 static int proc_dostring_coredump(struct ctl_table *table, int write, 194 void __user *buffer, size_t *lenp, loff_t *ppos); 195 #endif 196 197 #ifdef CONFIG_MAGIC_SYSRQ 198 /* Note: sysrq code uses it's own private copy */ 199 static int __sysrq_enabled = CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE; 200 201 static int sysrq_sysctl_handler(struct ctl_table *table, int write, 202 void __user *buffer, size_t *lenp, 203 loff_t *ppos) 204 { 205 int error; 206 207 error = proc_dointvec(table, write, buffer, lenp, ppos); 208 if (error) 209 return error; 210 211 if (write) 212 sysrq_toggle_support(__sysrq_enabled); 213 214 return 0; 215 } 216 217 #endif 218 219 static struct ctl_table kern_table[]; 220 static struct ctl_table vm_table[]; 221 static struct ctl_table fs_table[]; 222 static struct ctl_table debug_table[]; 223 static struct ctl_table dev_table[]; 224 extern struct ctl_table random_table[]; 225 #ifdef CONFIG_EPOLL 226 extern struct ctl_table epoll_table[]; 227 #endif 228 229 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT 230 int sysctl_legacy_va_layout; 231 #endif 232 233 /* The default sysctl tables: */ 234 235 static struct ctl_table sysctl_base_table[] = { 236 { 237 .procname = "kernel", 238 .mode = 0555, 239 .child = kern_table, 240 }, 241 { 242 .procname = "vm", 243 .mode = 0555, 244 .child = vm_table, 245 }, 246 { 247 .procname = "fs", 248 .mode = 0555, 249 .child = fs_table, 250 }, 251 { 252 .procname = "debug", 253 .mode = 0555, 254 .child = debug_table, 255 }, 256 { 257 .procname = "dev", 258 .mode = 0555, 259 .child = dev_table, 260 }, 261 { } 262 }; 263 264 #ifdef CONFIG_SCHED_DEBUG 265 static int min_sched_granularity_ns = 100000; /* 100 usecs */ 266 static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ 267 static int min_wakeup_granularity_ns; /* 0 usecs */ 268 static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ 269 #ifdef CONFIG_SMP 270 static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; 271 static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; 272 #endif /* CONFIG_SMP */ 273 #endif /* CONFIG_SCHED_DEBUG */ 274 275 #ifdef CONFIG_COMPACTION 276 static int min_extfrag_threshold; 277 static int max_extfrag_threshold = 1000; 278 #endif 279 280 static struct ctl_table kern_table[] = { 281 { 282 .procname = "sched_child_runs_first", 283 .data = &sysctl_sched_child_runs_first, 284 .maxlen = sizeof(unsigned int), 285 .mode = 0644, 286 .proc_handler = proc_dointvec, 287 }, 288 #ifdef CONFIG_SCHED_DEBUG 289 { 290 .procname = "sched_min_granularity_ns", 291 .data = &sysctl_sched_min_granularity, 292 .maxlen = sizeof(unsigned int), 293 .mode = 0644, 294 .proc_handler = sched_proc_update_handler, 295 .extra1 = &min_sched_granularity_ns, 296 .extra2 = &max_sched_granularity_ns, 297 }, 298 { 299 .procname = "sched_latency_ns", 300 .data = &sysctl_sched_latency, 301 .maxlen = sizeof(unsigned int), 302 .mode = 0644, 303 .proc_handler = sched_proc_update_handler, 304 .extra1 = &min_sched_granularity_ns, 305 .extra2 = &max_sched_granularity_ns, 306 }, 307 { 308 .procname = "sched_wakeup_granularity_ns", 309 .data = &sysctl_sched_wakeup_granularity, 310 .maxlen = sizeof(unsigned int), 311 .mode = 0644, 312 .proc_handler = sched_proc_update_handler, 313 .extra1 = &min_wakeup_granularity_ns, 314 .extra2 = &max_wakeup_granularity_ns, 315 }, 316 #ifdef CONFIG_SMP 317 { 318 .procname = "sched_tunable_scaling", 319 .data = &sysctl_sched_tunable_scaling, 320 .maxlen = sizeof(enum sched_tunable_scaling), 321 .mode = 0644, 322 .proc_handler = sched_proc_update_handler, 323 .extra1 = &min_sched_tunable_scaling, 324 .extra2 = &max_sched_tunable_scaling, 325 }, 326 { 327 .procname = "sched_migration_cost_ns", 328 .data = &sysctl_sched_migration_cost, 329 .maxlen = sizeof(unsigned int), 330 .mode = 0644, 331 .proc_handler = proc_dointvec, 332 }, 333 { 334 .procname = "sched_nr_migrate", 335 .data = &sysctl_sched_nr_migrate, 336 .maxlen = sizeof(unsigned int), 337 .mode = 0644, 338 .proc_handler = proc_dointvec, 339 }, 340 { 341 .procname = "sched_time_avg_ms", 342 .data = &sysctl_sched_time_avg, 343 .maxlen = sizeof(unsigned int), 344 .mode = 0644, 345 .proc_handler = proc_dointvec, 346 }, 347 { 348 .procname = "sched_shares_window_ns", 349 .data = &sysctl_sched_shares_window, 350 .maxlen = sizeof(unsigned int), 351 .mode = 0644, 352 .proc_handler = proc_dointvec, 353 }, 354 #ifdef CONFIG_SCHEDSTATS 355 { 356 .procname = "sched_schedstats", 357 .data = NULL, 358 .maxlen = sizeof(unsigned int), 359 .mode = 0644, 360 .proc_handler = sysctl_schedstats, 361 .extra1 = &zero, 362 .extra2 = &one, 363 }, 364 #endif /* CONFIG_SCHEDSTATS */ 365 #endif /* CONFIG_SMP */ 366 #ifdef CONFIG_NUMA_BALANCING 367 { 368 .procname = "numa_balancing_scan_delay_ms", 369 .data = &sysctl_numa_balancing_scan_delay, 370 .maxlen = sizeof(unsigned int), 371 .mode = 0644, 372 .proc_handler = proc_dointvec, 373 }, 374 { 375 .procname = "numa_balancing_scan_period_min_ms", 376 .data = &sysctl_numa_balancing_scan_period_min, 377 .maxlen = sizeof(unsigned int), 378 .mode = 0644, 379 .proc_handler = proc_dointvec, 380 }, 381 { 382 .procname = "numa_balancing_scan_period_max_ms", 383 .data = &sysctl_numa_balancing_scan_period_max, 384 .maxlen = sizeof(unsigned int), 385 .mode = 0644, 386 .proc_handler = proc_dointvec, 387 }, 388 { 389 .procname = "numa_balancing_scan_size_mb", 390 .data = &sysctl_numa_balancing_scan_size, 391 .maxlen = sizeof(unsigned int), 392 .mode = 0644, 393 .proc_handler = proc_dointvec_minmax, 394 .extra1 = &one, 395 }, 396 { 397 .procname = "numa_balancing", 398 .data = NULL, /* filled in by handler */ 399 .maxlen = sizeof(unsigned int), 400 .mode = 0644, 401 .proc_handler = sysctl_numa_balancing, 402 .extra1 = &zero, 403 .extra2 = &one, 404 }, 405 #endif /* CONFIG_NUMA_BALANCING */ 406 #endif /* CONFIG_SCHED_DEBUG */ 407 { 408 .procname = "sched_rt_period_us", 409 .data = &sysctl_sched_rt_period, 410 .maxlen = sizeof(unsigned int), 411 .mode = 0644, 412 .proc_handler = sched_rt_handler, 413 }, 414 { 415 .procname = "sched_rt_runtime_us", 416 .data = &sysctl_sched_rt_runtime, 417 .maxlen = sizeof(int), 418 .mode = 0644, 419 .proc_handler = sched_rt_handler, 420 }, 421 { 422 .procname = "sched_rr_timeslice_ms", 423 .data = &sched_rr_timeslice, 424 .maxlen = sizeof(int), 425 .mode = 0644, 426 .proc_handler = sched_rr_handler, 427 }, 428 #ifdef CONFIG_SCHED_AUTOGROUP 429 { 430 .procname = "sched_autogroup_enabled", 431 .data = &sysctl_sched_autogroup_enabled, 432 .maxlen = sizeof(unsigned int), 433 .mode = 0644, 434 .proc_handler = proc_dointvec_minmax, 435 .extra1 = &zero, 436 .extra2 = &one, 437 }, 438 #endif 439 #ifdef CONFIG_CFS_BANDWIDTH 440 { 441 .procname = "sched_cfs_bandwidth_slice_us", 442 .data = &sysctl_sched_cfs_bandwidth_slice, 443 .maxlen = sizeof(unsigned int), 444 .mode = 0644, 445 .proc_handler = proc_dointvec_minmax, 446 .extra1 = &one, 447 }, 448 #endif 449 #ifdef CONFIG_PROVE_LOCKING 450 { 451 .procname = "prove_locking", 452 .data = &prove_locking, 453 .maxlen = sizeof(int), 454 .mode = 0644, 455 .proc_handler = proc_dointvec, 456 }, 457 #endif 458 #ifdef CONFIG_LOCK_STAT 459 { 460 .procname = "lock_stat", 461 .data = &lock_stat, 462 .maxlen = sizeof(int), 463 .mode = 0644, 464 .proc_handler = proc_dointvec, 465 }, 466 #endif 467 { 468 .procname = "panic", 469 .data = &panic_timeout, 470 .maxlen = sizeof(int), 471 .mode = 0644, 472 .proc_handler = proc_dointvec, 473 }, 474 #ifdef CONFIG_COREDUMP 475 { 476 .procname = "core_uses_pid", 477 .data = &core_uses_pid, 478 .maxlen = sizeof(int), 479 .mode = 0644, 480 .proc_handler = proc_dointvec, 481 }, 482 { 483 .procname = "core_pattern", 484 .data = core_pattern, 485 .maxlen = CORENAME_MAX_SIZE, 486 .mode = 0644, 487 .proc_handler = proc_dostring_coredump, 488 }, 489 { 490 .procname = "core_pipe_limit", 491 .data = &core_pipe_limit, 492 .maxlen = sizeof(unsigned int), 493 .mode = 0644, 494 .proc_handler = proc_dointvec, 495 }, 496 #endif 497 #ifdef CONFIG_PROC_SYSCTL 498 { 499 .procname = "tainted", 500 .maxlen = sizeof(long), 501 .mode = 0644, 502 .proc_handler = proc_taint, 503 }, 504 { 505 .procname = "sysctl_writes_strict", 506 .data = &sysctl_writes_strict, 507 .maxlen = sizeof(int), 508 .mode = 0644, 509 .proc_handler = proc_dointvec_minmax, 510 .extra1 = &neg_one, 511 .extra2 = &one, 512 }, 513 #endif 514 #ifdef CONFIG_LATENCYTOP 515 { 516 .procname = "latencytop", 517 .data = &latencytop_enabled, 518 .maxlen = sizeof(int), 519 .mode = 0644, 520 .proc_handler = sysctl_latencytop, 521 }, 522 #endif 523 #ifdef CONFIG_BLK_DEV_INITRD 524 { 525 .procname = "real-root-dev", 526 .data = &real_root_dev, 527 .maxlen = sizeof(int), 528 .mode = 0644, 529 .proc_handler = proc_dointvec, 530 }, 531 #endif 532 { 533 .procname = "print-fatal-signals", 534 .data = &print_fatal_signals, 535 .maxlen = sizeof(int), 536 .mode = 0644, 537 .proc_handler = proc_dointvec, 538 }, 539 #ifdef CONFIG_SPARC 540 { 541 .procname = "reboot-cmd", 542 .data = reboot_command, 543 .maxlen = 256, 544 .mode = 0644, 545 .proc_handler = proc_dostring, 546 }, 547 { 548 .procname = "stop-a", 549 .data = &stop_a_enabled, 550 .maxlen = sizeof (int), 551 .mode = 0644, 552 .proc_handler = proc_dointvec, 553 }, 554 { 555 .procname = "scons-poweroff", 556 .data = &scons_pwroff, 557 .maxlen = sizeof (int), 558 .mode = 0644, 559 .proc_handler = proc_dointvec, 560 }, 561 #endif 562 #ifdef CONFIG_SPARC64 563 { 564 .procname = "tsb-ratio", 565 .data = &sysctl_tsb_ratio, 566 .maxlen = sizeof (int), 567 .mode = 0644, 568 .proc_handler = proc_dointvec, 569 }, 570 #endif 571 #ifdef __hppa__ 572 { 573 .procname = "soft-power", 574 .data = &pwrsw_enabled, 575 .maxlen = sizeof (int), 576 .mode = 0644, 577 .proc_handler = proc_dointvec, 578 }, 579 #endif 580 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW 581 { 582 .procname = "unaligned-trap", 583 .data = &unaligned_enabled, 584 .maxlen = sizeof (int), 585 .mode = 0644, 586 .proc_handler = proc_dointvec, 587 }, 588 #endif 589 { 590 .procname = "ctrl-alt-del", 591 .data = &C_A_D, 592 .maxlen = sizeof(int), 593 .mode = 0644, 594 .proc_handler = proc_dointvec, 595 }, 596 #ifdef CONFIG_FUNCTION_TRACER 597 { 598 .procname = "ftrace_enabled", 599 .data = &ftrace_enabled, 600 .maxlen = sizeof(int), 601 .mode = 0644, 602 .proc_handler = ftrace_enable_sysctl, 603 }, 604 #endif 605 #ifdef CONFIG_STACK_TRACER 606 { 607 .procname = "stack_tracer_enabled", 608 .data = &stack_tracer_enabled, 609 .maxlen = sizeof(int), 610 .mode = 0644, 611 .proc_handler = stack_trace_sysctl, 612 }, 613 #endif 614 #ifdef CONFIG_TRACING 615 { 616 .procname = "ftrace_dump_on_oops", 617 .data = &ftrace_dump_on_oops, 618 .maxlen = sizeof(int), 619 .mode = 0644, 620 .proc_handler = proc_dointvec, 621 }, 622 { 623 .procname = "traceoff_on_warning", 624 .data = &__disable_trace_on_warning, 625 .maxlen = sizeof(__disable_trace_on_warning), 626 .mode = 0644, 627 .proc_handler = proc_dointvec, 628 }, 629 { 630 .procname = "tracepoint_printk", 631 .data = &tracepoint_printk, 632 .maxlen = sizeof(tracepoint_printk), 633 .mode = 0644, 634 .proc_handler = proc_dointvec, 635 }, 636 #endif 637 #ifdef CONFIG_KEXEC_CORE 638 { 639 .procname = "kexec_load_disabled", 640 .data = &kexec_load_disabled, 641 .maxlen = sizeof(int), 642 .mode = 0644, 643 /* only handle a transition from default "0" to "1" */ 644 .proc_handler = proc_dointvec_minmax, 645 .extra1 = &one, 646 .extra2 = &one, 647 }, 648 #endif 649 #ifdef CONFIG_MODULES 650 { 651 .procname = "modprobe", 652 .data = &modprobe_path, 653 .maxlen = KMOD_PATH_LEN, 654 .mode = 0644, 655 .proc_handler = proc_dostring, 656 }, 657 { 658 .procname = "modules_disabled", 659 .data = &modules_disabled, 660 .maxlen = sizeof(int), 661 .mode = 0644, 662 /* only handle a transition from default "0" to "1" */ 663 .proc_handler = proc_dointvec_minmax, 664 .extra1 = &one, 665 .extra2 = &one, 666 }, 667 #endif 668 #ifdef CONFIG_UEVENT_HELPER 669 { 670 .procname = "hotplug", 671 .data = &uevent_helper, 672 .maxlen = UEVENT_HELPER_PATH_LEN, 673 .mode = 0644, 674 .proc_handler = proc_dostring, 675 }, 676 #endif 677 #ifdef CONFIG_CHR_DEV_SG 678 { 679 .procname = "sg-big-buff", 680 .data = &sg_big_buff, 681 .maxlen = sizeof (int), 682 .mode = 0444, 683 .proc_handler = proc_dointvec, 684 }, 685 #endif 686 #ifdef CONFIG_BSD_PROCESS_ACCT 687 { 688 .procname = "acct", 689 .data = &acct_parm, 690 .maxlen = 3*sizeof(int), 691 .mode = 0644, 692 .proc_handler = proc_dointvec, 693 }, 694 #endif 695 #ifdef CONFIG_MAGIC_SYSRQ 696 { 697 .procname = "sysrq", 698 .data = &__sysrq_enabled, 699 .maxlen = sizeof (int), 700 .mode = 0644, 701 .proc_handler = sysrq_sysctl_handler, 702 }, 703 #endif 704 #ifdef CONFIG_PROC_SYSCTL 705 { 706 .procname = "cad_pid", 707 .data = NULL, 708 .maxlen = sizeof (int), 709 .mode = 0600, 710 .proc_handler = proc_do_cad_pid, 711 }, 712 #endif 713 { 714 .procname = "threads-max", 715 .data = NULL, 716 .maxlen = sizeof(int), 717 .mode = 0644, 718 .proc_handler = sysctl_max_threads, 719 }, 720 { 721 .procname = "random", 722 .mode = 0555, 723 .child = random_table, 724 }, 725 { 726 .procname = "usermodehelper", 727 .mode = 0555, 728 .child = usermodehelper_table, 729 }, 730 { 731 .procname = "overflowuid", 732 .data = &overflowuid, 733 .maxlen = sizeof(int), 734 .mode = 0644, 735 .proc_handler = proc_dointvec_minmax, 736 .extra1 = &minolduid, 737 .extra2 = &maxolduid, 738 }, 739 { 740 .procname = "overflowgid", 741 .data = &overflowgid, 742 .maxlen = sizeof(int), 743 .mode = 0644, 744 .proc_handler = proc_dointvec_minmax, 745 .extra1 = &minolduid, 746 .extra2 = &maxolduid, 747 }, 748 #ifdef CONFIG_S390 749 #ifdef CONFIG_MATHEMU 750 { 751 .procname = "ieee_emulation_warnings", 752 .data = &sysctl_ieee_emulation_warnings, 753 .maxlen = sizeof(int), 754 .mode = 0644, 755 .proc_handler = proc_dointvec, 756 }, 757 #endif 758 { 759 .procname = "userprocess_debug", 760 .data = &show_unhandled_signals, 761 .maxlen = sizeof(int), 762 .mode = 0644, 763 .proc_handler = proc_dointvec, 764 }, 765 #endif 766 { 767 .procname = "pid_max", 768 .data = &pid_max, 769 .maxlen = sizeof (int), 770 .mode = 0644, 771 .proc_handler = proc_dointvec_minmax, 772 .extra1 = &pid_max_min, 773 .extra2 = &pid_max_max, 774 }, 775 { 776 .procname = "panic_on_oops", 777 .data = &panic_on_oops, 778 .maxlen = sizeof(int), 779 .mode = 0644, 780 .proc_handler = proc_dointvec, 781 }, 782 #if defined CONFIG_PRINTK 783 { 784 .procname = "printk", 785 .data = &console_loglevel, 786 .maxlen = 4*sizeof(int), 787 .mode = 0644, 788 .proc_handler = proc_dointvec, 789 }, 790 { 791 .procname = "printk_ratelimit", 792 .data = &printk_ratelimit_state.interval, 793 .maxlen = sizeof(int), 794 .mode = 0644, 795 .proc_handler = proc_dointvec_jiffies, 796 }, 797 { 798 .procname = "printk_ratelimit_burst", 799 .data = &printk_ratelimit_state.burst, 800 .maxlen = sizeof(int), 801 .mode = 0644, 802 .proc_handler = proc_dointvec, 803 }, 804 { 805 .procname = "printk_delay", 806 .data = &printk_delay_msec, 807 .maxlen = sizeof(int), 808 .mode = 0644, 809 .proc_handler = proc_dointvec_minmax, 810 .extra1 = &zero, 811 .extra2 = &ten_thousand, 812 }, 813 { 814 .procname = "dmesg_restrict", 815 .data = &dmesg_restrict, 816 .maxlen = sizeof(int), 817 .mode = 0644, 818 .proc_handler = proc_dointvec_minmax_sysadmin, 819 .extra1 = &zero, 820 .extra2 = &one, 821 }, 822 { 823 .procname = "kptr_restrict", 824 .data = &kptr_restrict, 825 .maxlen = sizeof(int), 826 .mode = 0644, 827 .proc_handler = proc_dointvec_minmax_sysadmin, 828 .extra1 = &zero, 829 .extra2 = &two, 830 }, 831 #endif 832 { 833 .procname = "ngroups_max", 834 .data = &ngroups_max, 835 .maxlen = sizeof (int), 836 .mode = 0444, 837 .proc_handler = proc_dointvec, 838 }, 839 { 840 .procname = "cap_last_cap", 841 .data = (void *)&cap_last_cap, 842 .maxlen = sizeof(int), 843 .mode = 0444, 844 .proc_handler = proc_dointvec, 845 }, 846 #if defined(CONFIG_LOCKUP_DETECTOR) 847 { 848 .procname = "watchdog", 849 .data = &watchdog_user_enabled, 850 .maxlen = sizeof (int), 851 .mode = 0644, 852 .proc_handler = proc_watchdog, 853 .extra1 = &zero, 854 .extra2 = &one, 855 }, 856 { 857 .procname = "watchdog_thresh", 858 .data = &watchdog_thresh, 859 .maxlen = sizeof(int), 860 .mode = 0644, 861 .proc_handler = proc_watchdog_thresh, 862 .extra1 = &zero, 863 .extra2 = &sixty, 864 }, 865 { 866 .procname = "nmi_watchdog", 867 .data = &nmi_watchdog_enabled, 868 .maxlen = sizeof (int), 869 .mode = 0644, 870 .proc_handler = proc_nmi_watchdog, 871 .extra1 = &zero, 872 #if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR) 873 .extra2 = &one, 874 #else 875 .extra2 = &zero, 876 #endif 877 }, 878 { 879 .procname = "soft_watchdog", 880 .data = &soft_watchdog_enabled, 881 .maxlen = sizeof (int), 882 .mode = 0644, 883 .proc_handler = proc_soft_watchdog, 884 .extra1 = &zero, 885 .extra2 = &one, 886 }, 887 { 888 .procname = "watchdog_cpumask", 889 .data = &watchdog_cpumask_bits, 890 .maxlen = NR_CPUS, 891 .mode = 0644, 892 .proc_handler = proc_watchdog_cpumask, 893 }, 894 { 895 .procname = "softlockup_panic", 896 .data = &softlockup_panic, 897 .maxlen = sizeof(int), 898 .mode = 0644, 899 .proc_handler = proc_dointvec_minmax, 900 .extra1 = &zero, 901 .extra2 = &one, 902 }, 903 #ifdef CONFIG_HARDLOCKUP_DETECTOR 904 { 905 .procname = "hardlockup_panic", 906 .data = &hardlockup_panic, 907 .maxlen = sizeof(int), 908 .mode = 0644, 909 .proc_handler = proc_dointvec_minmax, 910 .extra1 = &zero, 911 .extra2 = &one, 912 }, 913 #endif 914 #ifdef CONFIG_SMP 915 { 916 .procname = "softlockup_all_cpu_backtrace", 917 .data = &sysctl_softlockup_all_cpu_backtrace, 918 .maxlen = sizeof(int), 919 .mode = 0644, 920 .proc_handler = proc_dointvec_minmax, 921 .extra1 = &zero, 922 .extra2 = &one, 923 }, 924 { 925 .procname = "hardlockup_all_cpu_backtrace", 926 .data = &sysctl_hardlockup_all_cpu_backtrace, 927 .maxlen = sizeof(int), 928 .mode = 0644, 929 .proc_handler = proc_dointvec_minmax, 930 .extra1 = &zero, 931 .extra2 = &one, 932 }, 933 #endif /* CONFIG_SMP */ 934 #endif 935 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) 936 { 937 .procname = "unknown_nmi_panic", 938 .data = &unknown_nmi_panic, 939 .maxlen = sizeof (int), 940 .mode = 0644, 941 .proc_handler = proc_dointvec, 942 }, 943 #endif 944 #if defined(CONFIG_X86) 945 { 946 .procname = "panic_on_unrecovered_nmi", 947 .data = &panic_on_unrecovered_nmi, 948 .maxlen = sizeof(int), 949 .mode = 0644, 950 .proc_handler = proc_dointvec, 951 }, 952 { 953 .procname = "panic_on_io_nmi", 954 .data = &panic_on_io_nmi, 955 .maxlen = sizeof(int), 956 .mode = 0644, 957 .proc_handler = proc_dointvec, 958 }, 959 #ifdef CONFIG_DEBUG_STACKOVERFLOW 960 { 961 .procname = "panic_on_stackoverflow", 962 .data = &sysctl_panic_on_stackoverflow, 963 .maxlen = sizeof(int), 964 .mode = 0644, 965 .proc_handler = proc_dointvec, 966 }, 967 #endif 968 { 969 .procname = "bootloader_type", 970 .data = &bootloader_type, 971 .maxlen = sizeof (int), 972 .mode = 0444, 973 .proc_handler = proc_dointvec, 974 }, 975 { 976 .procname = "bootloader_version", 977 .data = &bootloader_version, 978 .maxlen = sizeof (int), 979 .mode = 0444, 980 .proc_handler = proc_dointvec, 981 }, 982 { 983 .procname = "kstack_depth_to_print", 984 .data = &kstack_depth_to_print, 985 .maxlen = sizeof(int), 986 .mode = 0644, 987 .proc_handler = proc_dointvec, 988 }, 989 { 990 .procname = "io_delay_type", 991 .data = &io_delay_type, 992 .maxlen = sizeof(int), 993 .mode = 0644, 994 .proc_handler = proc_dointvec, 995 }, 996 #endif 997 #if defined(CONFIG_MMU) 998 { 999 .procname = "randomize_va_space", 1000 .data = &randomize_va_space, 1001 .maxlen = sizeof(int), 1002 .mode = 0644, 1003 .proc_handler = proc_dointvec, 1004 }, 1005 #endif 1006 #if defined(CONFIG_S390) && defined(CONFIG_SMP) 1007 { 1008 .procname = "spin_retry", 1009 .data = &spin_retry, 1010 .maxlen = sizeof (int), 1011 .mode = 0644, 1012 .proc_handler = proc_dointvec, 1013 }, 1014 #endif 1015 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) 1016 { 1017 .procname = "acpi_video_flags", 1018 .data = &acpi_realmode_flags, 1019 .maxlen = sizeof (unsigned long), 1020 .mode = 0644, 1021 .proc_handler = proc_doulongvec_minmax, 1022 }, 1023 #endif 1024 #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN 1025 { 1026 .procname = "ignore-unaligned-usertrap", 1027 .data = &no_unaligned_warning, 1028 .maxlen = sizeof (int), 1029 .mode = 0644, 1030 .proc_handler = proc_dointvec, 1031 }, 1032 #endif 1033 #ifdef CONFIG_IA64 1034 { 1035 .procname = "unaligned-dump-stack", 1036 .data = &unaligned_dump_stack, 1037 .maxlen = sizeof (int), 1038 .mode = 0644, 1039 .proc_handler = proc_dointvec, 1040 }, 1041 #endif 1042 #ifdef CONFIG_DETECT_HUNG_TASK 1043 { 1044 .procname = "hung_task_panic", 1045 .data = &sysctl_hung_task_panic, 1046 .maxlen = sizeof(int), 1047 .mode = 0644, 1048 .proc_handler = proc_dointvec_minmax, 1049 .extra1 = &zero, 1050 .extra2 = &one, 1051 }, 1052 { 1053 .procname = "hung_task_check_count", 1054 .data = &sysctl_hung_task_check_count, 1055 .maxlen = sizeof(int), 1056 .mode = 0644, 1057 .proc_handler = proc_dointvec_minmax, 1058 .extra1 = &zero, 1059 }, 1060 { 1061 .procname = "hung_task_timeout_secs", 1062 .data = &sysctl_hung_task_timeout_secs, 1063 .maxlen = sizeof(unsigned long), 1064 .mode = 0644, 1065 .proc_handler = proc_dohung_task_timeout_secs, 1066 .extra2 = &hung_task_timeout_max, 1067 }, 1068 { 1069 .procname = "hung_task_warnings", 1070 .data = &sysctl_hung_task_warnings, 1071 .maxlen = sizeof(int), 1072 .mode = 0644, 1073 .proc_handler = proc_dointvec_minmax, 1074 .extra1 = &neg_one, 1075 }, 1076 #endif 1077 #ifdef CONFIG_COMPAT 1078 { 1079 .procname = "compat-log", 1080 .data = &compat_log, 1081 .maxlen = sizeof (int), 1082 .mode = 0644, 1083 .proc_handler = proc_dointvec, 1084 }, 1085 #endif 1086 #ifdef CONFIG_RT_MUTEXES 1087 { 1088 .procname = "max_lock_depth", 1089 .data = &max_lock_depth, 1090 .maxlen = sizeof(int), 1091 .mode = 0644, 1092 .proc_handler = proc_dointvec, 1093 }, 1094 #endif 1095 { 1096 .procname = "poweroff_cmd", 1097 .data = &poweroff_cmd, 1098 .maxlen = POWEROFF_CMD_PATH_LEN, 1099 .mode = 0644, 1100 .proc_handler = proc_dostring, 1101 }, 1102 #ifdef CONFIG_KEYS 1103 { 1104 .procname = "keys", 1105 .mode = 0555, 1106 .child = key_sysctls, 1107 }, 1108 #endif 1109 #ifdef CONFIG_PERF_EVENTS 1110 /* 1111 * User-space scripts rely on the existence of this file 1112 * as a feature check for perf_events being enabled. 1113 * 1114 * So it's an ABI, do not remove! 1115 */ 1116 { 1117 .procname = "perf_event_paranoid", 1118 .data = &sysctl_perf_event_paranoid, 1119 .maxlen = sizeof(sysctl_perf_event_paranoid), 1120 .mode = 0644, 1121 .proc_handler = proc_dointvec, 1122 }, 1123 { 1124 .procname = "perf_event_mlock_kb", 1125 .data = &sysctl_perf_event_mlock, 1126 .maxlen = sizeof(sysctl_perf_event_mlock), 1127 .mode = 0644, 1128 .proc_handler = proc_dointvec, 1129 }, 1130 { 1131 .procname = "perf_event_max_sample_rate", 1132 .data = &sysctl_perf_event_sample_rate, 1133 .maxlen = sizeof(sysctl_perf_event_sample_rate), 1134 .mode = 0644, 1135 .proc_handler = perf_proc_update_handler, 1136 .extra1 = &one, 1137 }, 1138 { 1139 .procname = "perf_cpu_time_max_percent", 1140 .data = &sysctl_perf_cpu_time_max_percent, 1141 .maxlen = sizeof(sysctl_perf_cpu_time_max_percent), 1142 .mode = 0644, 1143 .proc_handler = perf_cpu_time_max_percent_handler, 1144 .extra1 = &zero, 1145 .extra2 = &one_hundred, 1146 }, 1147 #endif 1148 #ifdef CONFIG_KMEMCHECK 1149 { 1150 .procname = "kmemcheck", 1151 .data = &kmemcheck_enabled, 1152 .maxlen = sizeof(int), 1153 .mode = 0644, 1154 .proc_handler = proc_dointvec, 1155 }, 1156 #endif 1157 { 1158 .procname = "panic_on_warn", 1159 .data = &panic_on_warn, 1160 .maxlen = sizeof(int), 1161 .mode = 0644, 1162 .proc_handler = proc_dointvec_minmax, 1163 .extra1 = &zero, 1164 .extra2 = &one, 1165 }, 1166 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) 1167 { 1168 .procname = "timer_migration", 1169 .data = &sysctl_timer_migration, 1170 .maxlen = sizeof(unsigned int), 1171 .mode = 0644, 1172 .proc_handler = timer_migration_handler, 1173 }, 1174 #endif 1175 #ifdef CONFIG_BPF_SYSCALL 1176 { 1177 .procname = "unprivileged_bpf_disabled", 1178 .data = &sysctl_unprivileged_bpf_disabled, 1179 .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), 1180 .mode = 0644, 1181 /* only handle a transition from default "0" to "1" */ 1182 .proc_handler = proc_dointvec_minmax, 1183 .extra1 = &one, 1184 .extra2 = &one, 1185 }, 1186 #endif 1187 { } 1188 }; 1189 1190 static struct ctl_table vm_table[] = { 1191 { 1192 .procname = "overcommit_memory", 1193 .data = &sysctl_overcommit_memory, 1194 .maxlen = sizeof(sysctl_overcommit_memory), 1195 .mode = 0644, 1196 .proc_handler = proc_dointvec_minmax, 1197 .extra1 = &zero, 1198 .extra2 = &two, 1199 }, 1200 { 1201 .procname = "panic_on_oom", 1202 .data = &sysctl_panic_on_oom, 1203 .maxlen = sizeof(sysctl_panic_on_oom), 1204 .mode = 0644, 1205 .proc_handler = proc_dointvec_minmax, 1206 .extra1 = &zero, 1207 .extra2 = &two, 1208 }, 1209 { 1210 .procname = "oom_kill_allocating_task", 1211 .data = &sysctl_oom_kill_allocating_task, 1212 .maxlen = sizeof(sysctl_oom_kill_allocating_task), 1213 .mode = 0644, 1214 .proc_handler = proc_dointvec, 1215 }, 1216 { 1217 .procname = "oom_dump_tasks", 1218 .data = &sysctl_oom_dump_tasks, 1219 .maxlen = sizeof(sysctl_oom_dump_tasks), 1220 .mode = 0644, 1221 .proc_handler = proc_dointvec, 1222 }, 1223 { 1224 .procname = "overcommit_ratio", 1225 .data = &sysctl_overcommit_ratio, 1226 .maxlen = sizeof(sysctl_overcommit_ratio), 1227 .mode = 0644, 1228 .proc_handler = overcommit_ratio_handler, 1229 }, 1230 { 1231 .procname = "overcommit_kbytes", 1232 .data = &sysctl_overcommit_kbytes, 1233 .maxlen = sizeof(sysctl_overcommit_kbytes), 1234 .mode = 0644, 1235 .proc_handler = overcommit_kbytes_handler, 1236 }, 1237 { 1238 .procname = "page-cluster", 1239 .data = &page_cluster, 1240 .maxlen = sizeof(int), 1241 .mode = 0644, 1242 .proc_handler = proc_dointvec_minmax, 1243 .extra1 = &zero, 1244 }, 1245 { 1246 .procname = "dirty_background_ratio", 1247 .data = &dirty_background_ratio, 1248 .maxlen = sizeof(dirty_background_ratio), 1249 .mode = 0644, 1250 .proc_handler = dirty_background_ratio_handler, 1251 .extra1 = &zero, 1252 .extra2 = &one_hundred, 1253 }, 1254 { 1255 .procname = "dirty_background_bytes", 1256 .data = &dirty_background_bytes, 1257 .maxlen = sizeof(dirty_background_bytes), 1258 .mode = 0644, 1259 .proc_handler = dirty_background_bytes_handler, 1260 .extra1 = &one_ul, 1261 }, 1262 { 1263 .procname = "dirty_ratio", 1264 .data = &vm_dirty_ratio, 1265 .maxlen = sizeof(vm_dirty_ratio), 1266 .mode = 0644, 1267 .proc_handler = dirty_ratio_handler, 1268 .extra1 = &zero, 1269 .extra2 = &one_hundred, 1270 }, 1271 { 1272 .procname = "dirty_bytes", 1273 .data = &vm_dirty_bytes, 1274 .maxlen = sizeof(vm_dirty_bytes), 1275 .mode = 0644, 1276 .proc_handler = dirty_bytes_handler, 1277 .extra1 = &dirty_bytes_min, 1278 }, 1279 { 1280 .procname = "dirty_writeback_centisecs", 1281 .data = &dirty_writeback_interval, 1282 .maxlen = sizeof(dirty_writeback_interval), 1283 .mode = 0644, 1284 .proc_handler = dirty_writeback_centisecs_handler, 1285 }, 1286 { 1287 .procname = "dirty_expire_centisecs", 1288 .data = &dirty_expire_interval, 1289 .maxlen = sizeof(dirty_expire_interval), 1290 .mode = 0644, 1291 .proc_handler = proc_dointvec_minmax, 1292 .extra1 = &zero, 1293 }, 1294 { 1295 .procname = "dirtytime_expire_seconds", 1296 .data = &dirtytime_expire_interval, 1297 .maxlen = sizeof(dirty_expire_interval), 1298 .mode = 0644, 1299 .proc_handler = dirtytime_interval_handler, 1300 .extra1 = &zero, 1301 }, 1302 { 1303 .procname = "nr_pdflush_threads", 1304 .mode = 0444 /* read-only */, 1305 .proc_handler = pdflush_proc_obsolete, 1306 }, 1307 { 1308 .procname = "swappiness", 1309 .data = &vm_swappiness, 1310 .maxlen = sizeof(vm_swappiness), 1311 .mode = 0644, 1312 .proc_handler = proc_dointvec_minmax, 1313 .extra1 = &zero, 1314 .extra2 = &one_hundred, 1315 }, 1316 #ifdef CONFIG_HUGETLB_PAGE 1317 { 1318 .procname = "nr_hugepages", 1319 .data = NULL, 1320 .maxlen = sizeof(unsigned long), 1321 .mode = 0644, 1322 .proc_handler = hugetlb_sysctl_handler, 1323 }, 1324 #ifdef CONFIG_NUMA 1325 { 1326 .procname = "nr_hugepages_mempolicy", 1327 .data = NULL, 1328 .maxlen = sizeof(unsigned long), 1329 .mode = 0644, 1330 .proc_handler = &hugetlb_mempolicy_sysctl_handler, 1331 }, 1332 #endif 1333 { 1334 .procname = "hugetlb_shm_group", 1335 .data = &sysctl_hugetlb_shm_group, 1336 .maxlen = sizeof(gid_t), 1337 .mode = 0644, 1338 .proc_handler = proc_dointvec, 1339 }, 1340 { 1341 .procname = "hugepages_treat_as_movable", 1342 .data = &hugepages_treat_as_movable, 1343 .maxlen = sizeof(int), 1344 .mode = 0644, 1345 .proc_handler = proc_dointvec, 1346 }, 1347 { 1348 .procname = "nr_overcommit_hugepages", 1349 .data = NULL, 1350 .maxlen = sizeof(unsigned long), 1351 .mode = 0644, 1352 .proc_handler = hugetlb_overcommit_handler, 1353 }, 1354 #endif 1355 { 1356 .procname = "lowmem_reserve_ratio", 1357 .data = &sysctl_lowmem_reserve_ratio, 1358 .maxlen = sizeof(sysctl_lowmem_reserve_ratio), 1359 .mode = 0644, 1360 .proc_handler = lowmem_reserve_ratio_sysctl_handler, 1361 }, 1362 { 1363 .procname = "drop_caches", 1364 .data = &sysctl_drop_caches, 1365 .maxlen = sizeof(int), 1366 .mode = 0644, 1367 .proc_handler = drop_caches_sysctl_handler, 1368 .extra1 = &one, 1369 .extra2 = &four, 1370 }, 1371 #ifdef CONFIG_COMPACTION 1372 { 1373 .procname = "compact_memory", 1374 .data = &sysctl_compact_memory, 1375 .maxlen = sizeof(int), 1376 .mode = 0200, 1377 .proc_handler = sysctl_compaction_handler, 1378 }, 1379 { 1380 .procname = "extfrag_threshold", 1381 .data = &sysctl_extfrag_threshold, 1382 .maxlen = sizeof(int), 1383 .mode = 0644, 1384 .proc_handler = sysctl_extfrag_handler, 1385 .extra1 = &min_extfrag_threshold, 1386 .extra2 = &max_extfrag_threshold, 1387 }, 1388 { 1389 .procname = "compact_unevictable_allowed", 1390 .data = &sysctl_compact_unevictable_allowed, 1391 .maxlen = sizeof(int), 1392 .mode = 0644, 1393 .proc_handler = proc_dointvec, 1394 .extra1 = &zero, 1395 .extra2 = &one, 1396 }, 1397 1398 #endif /* CONFIG_COMPACTION */ 1399 { 1400 .procname = "min_free_kbytes", 1401 .data = &min_free_kbytes, 1402 .maxlen = sizeof(min_free_kbytes), 1403 .mode = 0644, 1404 .proc_handler = min_free_kbytes_sysctl_handler, 1405 .extra1 = &zero, 1406 }, 1407 { 1408 .procname = "watermark_scale_factor", 1409 .data = &watermark_scale_factor, 1410 .maxlen = sizeof(watermark_scale_factor), 1411 .mode = 0644, 1412 .proc_handler = watermark_scale_factor_sysctl_handler, 1413 .extra1 = &one, 1414 .extra2 = &one_thousand, 1415 }, 1416 { 1417 .procname = "percpu_pagelist_fraction", 1418 .data = &percpu_pagelist_fraction, 1419 .maxlen = sizeof(percpu_pagelist_fraction), 1420 .mode = 0644, 1421 .proc_handler = percpu_pagelist_fraction_sysctl_handler, 1422 .extra1 = &zero, 1423 }, 1424 #ifdef CONFIG_MMU 1425 { 1426 .procname = "max_map_count", 1427 .data = &sysctl_max_map_count, 1428 .maxlen = sizeof(sysctl_max_map_count), 1429 .mode = 0644, 1430 .proc_handler = proc_dointvec_minmax, 1431 .extra1 = &zero, 1432 }, 1433 #else 1434 { 1435 .procname = "nr_trim_pages", 1436 .data = &sysctl_nr_trim_pages, 1437 .maxlen = sizeof(sysctl_nr_trim_pages), 1438 .mode = 0644, 1439 .proc_handler = proc_dointvec_minmax, 1440 .extra1 = &zero, 1441 }, 1442 #endif 1443 { 1444 .procname = "laptop_mode", 1445 .data = &laptop_mode, 1446 .maxlen = sizeof(laptop_mode), 1447 .mode = 0644, 1448 .proc_handler = proc_dointvec_jiffies, 1449 }, 1450 { 1451 .procname = "block_dump", 1452 .data = &block_dump, 1453 .maxlen = sizeof(block_dump), 1454 .mode = 0644, 1455 .proc_handler = proc_dointvec, 1456 .extra1 = &zero, 1457 }, 1458 { 1459 .procname = "vfs_cache_pressure", 1460 .data = &sysctl_vfs_cache_pressure, 1461 .maxlen = sizeof(sysctl_vfs_cache_pressure), 1462 .mode = 0644, 1463 .proc_handler = proc_dointvec, 1464 .extra1 = &zero, 1465 }, 1466 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT 1467 { 1468 .procname = "legacy_va_layout", 1469 .data = &sysctl_legacy_va_layout, 1470 .maxlen = sizeof(sysctl_legacy_va_layout), 1471 .mode = 0644, 1472 .proc_handler = proc_dointvec, 1473 .extra1 = &zero, 1474 }, 1475 #endif 1476 #ifdef CONFIG_NUMA 1477 { 1478 .procname = "zone_reclaim_mode", 1479 .data = &zone_reclaim_mode, 1480 .maxlen = sizeof(zone_reclaim_mode), 1481 .mode = 0644, 1482 .proc_handler = proc_dointvec, 1483 .extra1 = &zero, 1484 }, 1485 { 1486 .procname = "min_unmapped_ratio", 1487 .data = &sysctl_min_unmapped_ratio, 1488 .maxlen = sizeof(sysctl_min_unmapped_ratio), 1489 .mode = 0644, 1490 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, 1491 .extra1 = &zero, 1492 .extra2 = &one_hundred, 1493 }, 1494 { 1495 .procname = "min_slab_ratio", 1496 .data = &sysctl_min_slab_ratio, 1497 .maxlen = sizeof(sysctl_min_slab_ratio), 1498 .mode = 0644, 1499 .proc_handler = sysctl_min_slab_ratio_sysctl_handler, 1500 .extra1 = &zero, 1501 .extra2 = &one_hundred, 1502 }, 1503 #endif 1504 #ifdef CONFIG_SMP 1505 { 1506 .procname = "stat_interval", 1507 .data = &sysctl_stat_interval, 1508 .maxlen = sizeof(sysctl_stat_interval), 1509 .mode = 0644, 1510 .proc_handler = proc_dointvec_jiffies, 1511 }, 1512 #endif 1513 #ifdef CONFIG_MMU 1514 { 1515 .procname = "mmap_min_addr", 1516 .data = &dac_mmap_min_addr, 1517 .maxlen = sizeof(unsigned long), 1518 .mode = 0644, 1519 .proc_handler = mmap_min_addr_handler, 1520 }, 1521 #endif 1522 #ifdef CONFIG_NUMA 1523 { 1524 .procname = "numa_zonelist_order", 1525 .data = &numa_zonelist_order, 1526 .maxlen = NUMA_ZONELIST_ORDER_LEN, 1527 .mode = 0644, 1528 .proc_handler = numa_zonelist_order_handler, 1529 }, 1530 #endif 1531 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ 1532 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) 1533 { 1534 .procname = "vdso_enabled", 1535 #ifdef CONFIG_X86_32 1536 .data = &vdso32_enabled, 1537 .maxlen = sizeof(vdso32_enabled), 1538 #else 1539 .data = &vdso_enabled, 1540 .maxlen = sizeof(vdso_enabled), 1541 #endif 1542 .mode = 0644, 1543 .proc_handler = proc_dointvec, 1544 .extra1 = &zero, 1545 }, 1546 #endif 1547 #ifdef CONFIG_HIGHMEM 1548 { 1549 .procname = "highmem_is_dirtyable", 1550 .data = &vm_highmem_is_dirtyable, 1551 .maxlen = sizeof(vm_highmem_is_dirtyable), 1552 .mode = 0644, 1553 .proc_handler = proc_dointvec_minmax, 1554 .extra1 = &zero, 1555 .extra2 = &one, 1556 }, 1557 #endif 1558 #ifdef CONFIG_MEMORY_FAILURE 1559 { 1560 .procname = "memory_failure_early_kill", 1561 .data = &sysctl_memory_failure_early_kill, 1562 .maxlen = sizeof(sysctl_memory_failure_early_kill), 1563 .mode = 0644, 1564 .proc_handler = proc_dointvec_minmax, 1565 .extra1 = &zero, 1566 .extra2 = &one, 1567 }, 1568 { 1569 .procname = "memory_failure_recovery", 1570 .data = &sysctl_memory_failure_recovery, 1571 .maxlen = sizeof(sysctl_memory_failure_recovery), 1572 .mode = 0644, 1573 .proc_handler = proc_dointvec_minmax, 1574 .extra1 = &zero, 1575 .extra2 = &one, 1576 }, 1577 #endif 1578 { 1579 .procname = "user_reserve_kbytes", 1580 .data = &sysctl_user_reserve_kbytes, 1581 .maxlen = sizeof(sysctl_user_reserve_kbytes), 1582 .mode = 0644, 1583 .proc_handler = proc_doulongvec_minmax, 1584 }, 1585 { 1586 .procname = "admin_reserve_kbytes", 1587 .data = &sysctl_admin_reserve_kbytes, 1588 .maxlen = sizeof(sysctl_admin_reserve_kbytes), 1589 .mode = 0644, 1590 .proc_handler = proc_doulongvec_minmax, 1591 }, 1592 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS 1593 { 1594 .procname = "mmap_rnd_bits", 1595 .data = &mmap_rnd_bits, 1596 .maxlen = sizeof(mmap_rnd_bits), 1597 .mode = 0600, 1598 .proc_handler = proc_dointvec_minmax, 1599 .extra1 = (void *)&mmap_rnd_bits_min, 1600 .extra2 = (void *)&mmap_rnd_bits_max, 1601 }, 1602 #endif 1603 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS 1604 { 1605 .procname = "mmap_rnd_compat_bits", 1606 .data = &mmap_rnd_compat_bits, 1607 .maxlen = sizeof(mmap_rnd_compat_bits), 1608 .mode = 0600, 1609 .proc_handler = proc_dointvec_minmax, 1610 .extra1 = (void *)&mmap_rnd_compat_bits_min, 1611 .extra2 = (void *)&mmap_rnd_compat_bits_max, 1612 }, 1613 #endif 1614 { } 1615 }; 1616 1617 static struct ctl_table fs_table[] = { 1618 { 1619 .procname = "inode-nr", 1620 .data = &inodes_stat, 1621 .maxlen = 2*sizeof(long), 1622 .mode = 0444, 1623 .proc_handler = proc_nr_inodes, 1624 }, 1625 { 1626 .procname = "inode-state", 1627 .data = &inodes_stat, 1628 .maxlen = 7*sizeof(long), 1629 .mode = 0444, 1630 .proc_handler = proc_nr_inodes, 1631 }, 1632 { 1633 .procname = "file-nr", 1634 .data = &files_stat, 1635 .maxlen = sizeof(files_stat), 1636 .mode = 0444, 1637 .proc_handler = proc_nr_files, 1638 }, 1639 { 1640 .procname = "file-max", 1641 .data = &files_stat.max_files, 1642 .maxlen = sizeof(files_stat.max_files), 1643 .mode = 0644, 1644 .proc_handler = proc_doulongvec_minmax, 1645 }, 1646 { 1647 .procname = "nr_open", 1648 .data = &sysctl_nr_open, 1649 .maxlen = sizeof(int), 1650 .mode = 0644, 1651 .proc_handler = proc_dointvec_minmax, 1652 .extra1 = &sysctl_nr_open_min, 1653 .extra2 = &sysctl_nr_open_max, 1654 }, 1655 { 1656 .procname = "dentry-state", 1657 .data = &dentry_stat, 1658 .maxlen = 6*sizeof(long), 1659 .mode = 0444, 1660 .proc_handler = proc_nr_dentry, 1661 }, 1662 { 1663 .procname = "overflowuid", 1664 .data = &fs_overflowuid, 1665 .maxlen = sizeof(int), 1666 .mode = 0644, 1667 .proc_handler = proc_dointvec_minmax, 1668 .extra1 = &minolduid, 1669 .extra2 = &maxolduid, 1670 }, 1671 { 1672 .procname = "overflowgid", 1673 .data = &fs_overflowgid, 1674 .maxlen = sizeof(int), 1675 .mode = 0644, 1676 .proc_handler = proc_dointvec_minmax, 1677 .extra1 = &minolduid, 1678 .extra2 = &maxolduid, 1679 }, 1680 #ifdef CONFIG_FILE_LOCKING 1681 { 1682 .procname = "leases-enable", 1683 .data = &leases_enable, 1684 .maxlen = sizeof(int), 1685 .mode = 0644, 1686 .proc_handler = proc_dointvec, 1687 }, 1688 #endif 1689 #ifdef CONFIG_DNOTIFY 1690 { 1691 .procname = "dir-notify-enable", 1692 .data = &dir_notify_enable, 1693 .maxlen = sizeof(int), 1694 .mode = 0644, 1695 .proc_handler = proc_dointvec, 1696 }, 1697 #endif 1698 #ifdef CONFIG_MMU 1699 #ifdef CONFIG_FILE_LOCKING 1700 { 1701 .procname = "lease-break-time", 1702 .data = &lease_break_time, 1703 .maxlen = sizeof(int), 1704 .mode = 0644, 1705 .proc_handler = proc_dointvec, 1706 }, 1707 #endif 1708 #ifdef CONFIG_AIO 1709 { 1710 .procname = "aio-nr", 1711 .data = &aio_nr, 1712 .maxlen = sizeof(aio_nr), 1713 .mode = 0444, 1714 .proc_handler = proc_doulongvec_minmax, 1715 }, 1716 { 1717 .procname = "aio-max-nr", 1718 .data = &aio_max_nr, 1719 .maxlen = sizeof(aio_max_nr), 1720 .mode = 0644, 1721 .proc_handler = proc_doulongvec_minmax, 1722 }, 1723 #endif /* CONFIG_AIO */ 1724 #ifdef CONFIG_INOTIFY_USER 1725 { 1726 .procname = "inotify", 1727 .mode = 0555, 1728 .child = inotify_table, 1729 }, 1730 #endif 1731 #ifdef CONFIG_EPOLL 1732 { 1733 .procname = "epoll", 1734 .mode = 0555, 1735 .child = epoll_table, 1736 }, 1737 #endif 1738 #endif 1739 { 1740 .procname = "protected_symlinks", 1741 .data = &sysctl_protected_symlinks, 1742 .maxlen = sizeof(int), 1743 .mode = 0600, 1744 .proc_handler = proc_dointvec_minmax, 1745 .extra1 = &zero, 1746 .extra2 = &one, 1747 }, 1748 { 1749 .procname = "protected_hardlinks", 1750 .data = &sysctl_protected_hardlinks, 1751 .maxlen = sizeof(int), 1752 .mode = 0600, 1753 .proc_handler = proc_dointvec_minmax, 1754 .extra1 = &zero, 1755 .extra2 = &one, 1756 }, 1757 { 1758 .procname = "suid_dumpable", 1759 .data = &suid_dumpable, 1760 .maxlen = sizeof(int), 1761 .mode = 0644, 1762 .proc_handler = proc_dointvec_minmax_coredump, 1763 .extra1 = &zero, 1764 .extra2 = &two, 1765 }, 1766 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) 1767 { 1768 .procname = "binfmt_misc", 1769 .mode = 0555, 1770 .child = sysctl_mount_point, 1771 }, 1772 #endif 1773 { 1774 .procname = "pipe-max-size", 1775 .data = &pipe_max_size, 1776 .maxlen = sizeof(int), 1777 .mode = 0644, 1778 .proc_handler = &pipe_proc_fn, 1779 .extra1 = &pipe_min_size, 1780 }, 1781 { 1782 .procname = "pipe-user-pages-hard", 1783 .data = &pipe_user_pages_hard, 1784 .maxlen = sizeof(pipe_user_pages_hard), 1785 .mode = 0644, 1786 .proc_handler = proc_doulongvec_minmax, 1787 }, 1788 { 1789 .procname = "pipe-user-pages-soft", 1790 .data = &pipe_user_pages_soft, 1791 .maxlen = sizeof(pipe_user_pages_soft), 1792 .mode = 0644, 1793 .proc_handler = proc_doulongvec_minmax, 1794 }, 1795 { } 1796 }; 1797 1798 static struct ctl_table debug_table[] = { 1799 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE 1800 { 1801 .procname = "exception-trace", 1802 .data = &show_unhandled_signals, 1803 .maxlen = sizeof(int), 1804 .mode = 0644, 1805 .proc_handler = proc_dointvec 1806 }, 1807 #endif 1808 #if defined(CONFIG_OPTPROBES) 1809 { 1810 .procname = "kprobes-optimization", 1811 .data = &sysctl_kprobes_optimization, 1812 .maxlen = sizeof(int), 1813 .mode = 0644, 1814 .proc_handler = proc_kprobes_optimization_handler, 1815 .extra1 = &zero, 1816 .extra2 = &one, 1817 }, 1818 #endif 1819 { } 1820 }; 1821 1822 static struct ctl_table dev_table[] = { 1823 { } 1824 }; 1825 1826 int __init sysctl_init(void) 1827 { 1828 struct ctl_table_header *hdr; 1829 1830 hdr = register_sysctl_table(sysctl_base_table); 1831 kmemleak_not_leak(hdr); 1832 return 0; 1833 } 1834 1835 #endif /* CONFIG_SYSCTL */ 1836 1837 /* 1838 * /proc/sys support 1839 */ 1840 1841 #ifdef CONFIG_PROC_SYSCTL 1842 1843 static int _proc_do_string(char *data, int maxlen, int write, 1844 char __user *buffer, 1845 size_t *lenp, loff_t *ppos) 1846 { 1847 size_t len; 1848 char __user *p; 1849 char c; 1850 1851 if (!data || !maxlen || !*lenp) { 1852 *lenp = 0; 1853 return 0; 1854 } 1855 1856 if (write) { 1857 if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { 1858 /* Only continue writes not past the end of buffer. */ 1859 len = strlen(data); 1860 if (len > maxlen - 1) 1861 len = maxlen - 1; 1862 1863 if (*ppos > len) 1864 return 0; 1865 len = *ppos; 1866 } else { 1867 /* Start writing from beginning of buffer. */ 1868 len = 0; 1869 } 1870 1871 *ppos += *lenp; 1872 p = buffer; 1873 while ((p - buffer) < *lenp && len < maxlen - 1) { 1874 if (get_user(c, p++)) 1875 return -EFAULT; 1876 if (c == 0 || c == '\n') 1877 break; 1878 data[len++] = c; 1879 } 1880 data[len] = 0; 1881 } else { 1882 len = strlen(data); 1883 if (len > maxlen) 1884 len = maxlen; 1885 1886 if (*ppos > len) { 1887 *lenp = 0; 1888 return 0; 1889 } 1890 1891 data += *ppos; 1892 len -= *ppos; 1893 1894 if (len > *lenp) 1895 len = *lenp; 1896 if (len) 1897 if (copy_to_user(buffer, data, len)) 1898 return -EFAULT; 1899 if (len < *lenp) { 1900 if (put_user('\n', buffer + len)) 1901 return -EFAULT; 1902 len++; 1903 } 1904 *lenp = len; 1905 *ppos += len; 1906 } 1907 return 0; 1908 } 1909 1910 static void warn_sysctl_write(struct ctl_table *table) 1911 { 1912 pr_warn_once("%s wrote to %s when file position was not 0!\n" 1913 "This will not be supported in the future. To silence this\n" 1914 "warning, set kernel.sysctl_writes_strict = -1\n", 1915 current->comm, table->procname); 1916 } 1917 1918 /** 1919 * proc_dostring - read a string sysctl 1920 * @table: the sysctl table 1921 * @write: %TRUE if this is a write to the sysctl file 1922 * @buffer: the user buffer 1923 * @lenp: the size of the user buffer 1924 * @ppos: file position 1925 * 1926 * Reads/writes a string from/to the user buffer. If the kernel 1927 * buffer provided is not large enough to hold the string, the 1928 * string is truncated. The copied string is %NULL-terminated. 1929 * If the string is being read by the user process, it is copied 1930 * and a newline '\n' is added. It is truncated if the buffer is 1931 * not large enough. 1932 * 1933 * Returns 0 on success. 1934 */ 1935 int proc_dostring(struct ctl_table *table, int write, 1936 void __user *buffer, size_t *lenp, loff_t *ppos) 1937 { 1938 if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) 1939 warn_sysctl_write(table); 1940 1941 return _proc_do_string((char *)(table->data), table->maxlen, write, 1942 (char __user *)buffer, lenp, ppos); 1943 } 1944 1945 static size_t proc_skip_spaces(char **buf) 1946 { 1947 size_t ret; 1948 char *tmp = skip_spaces(*buf); 1949 ret = tmp - *buf; 1950 *buf = tmp; 1951 return ret; 1952 } 1953 1954 static void proc_skip_char(char **buf, size_t *size, const char v) 1955 { 1956 while (*size) { 1957 if (**buf != v) 1958 break; 1959 (*size)--; 1960 (*buf)++; 1961 } 1962 } 1963 1964 #define TMPBUFLEN 22 1965 /** 1966 * proc_get_long - reads an ASCII formatted integer from a user buffer 1967 * 1968 * @buf: a kernel buffer 1969 * @size: size of the kernel buffer 1970 * @val: this is where the number will be stored 1971 * @neg: set to %TRUE if number is negative 1972 * @perm_tr: a vector which contains the allowed trailers 1973 * @perm_tr_len: size of the perm_tr vector 1974 * @tr: pointer to store the trailer character 1975 * 1976 * In case of success %0 is returned and @buf and @size are updated with 1977 * the amount of bytes read. If @tr is non-NULL and a trailing 1978 * character exists (size is non-zero after returning from this 1979 * function), @tr is updated with the trailing character. 1980 */ 1981 static int proc_get_long(char **buf, size_t *size, 1982 unsigned long *val, bool *neg, 1983 const char *perm_tr, unsigned perm_tr_len, char *tr) 1984 { 1985 int len; 1986 char *p, tmp[TMPBUFLEN]; 1987 1988 if (!*size) 1989 return -EINVAL; 1990 1991 len = *size; 1992 if (len > TMPBUFLEN - 1) 1993 len = TMPBUFLEN - 1; 1994 1995 memcpy(tmp, *buf, len); 1996 1997 tmp[len] = 0; 1998 p = tmp; 1999 if (*p == '-' && *size > 1) { 2000 *neg = true; 2001 p++; 2002 } else 2003 *neg = false; 2004 if (!isdigit(*p)) 2005 return -EINVAL; 2006 2007 *val = simple_strtoul(p, &p, 0); 2008 2009 len = p - tmp; 2010 2011 /* We don't know if the next char is whitespace thus we may accept 2012 * invalid integers (e.g. 1234...a) or two integers instead of one 2013 * (e.g. 123...1). So lets not allow such large numbers. */ 2014 if (len == TMPBUFLEN - 1) 2015 return -EINVAL; 2016 2017 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) 2018 return -EINVAL; 2019 2020 if (tr && (len < *size)) 2021 *tr = *p; 2022 2023 *buf += len; 2024 *size -= len; 2025 2026 return 0; 2027 } 2028 2029 /** 2030 * proc_put_long - converts an integer to a decimal ASCII formatted string 2031 * 2032 * @buf: the user buffer 2033 * @size: the size of the user buffer 2034 * @val: the integer to be converted 2035 * @neg: sign of the number, %TRUE for negative 2036 * 2037 * In case of success %0 is returned and @buf and @size are updated with 2038 * the amount of bytes written. 2039 */ 2040 static int proc_put_long(void __user **buf, size_t *size, unsigned long val, 2041 bool neg) 2042 { 2043 int len; 2044 char tmp[TMPBUFLEN], *p = tmp; 2045 2046 sprintf(p, "%s%lu", neg ? "-" : "", val); 2047 len = strlen(tmp); 2048 if (len > *size) 2049 len = *size; 2050 if (copy_to_user(*buf, tmp, len)) 2051 return -EFAULT; 2052 *size -= len; 2053 *buf += len; 2054 return 0; 2055 } 2056 #undef TMPBUFLEN 2057 2058 static int proc_put_char(void __user **buf, size_t *size, char c) 2059 { 2060 if (*size) { 2061 char __user **buffer = (char __user **)buf; 2062 if (put_user(c, *buffer)) 2063 return -EFAULT; 2064 (*size)--, (*buffer)++; 2065 *buf = *buffer; 2066 } 2067 return 0; 2068 } 2069 2070 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, 2071 int *valp, 2072 int write, void *data) 2073 { 2074 if (write) { 2075 if (*negp) { 2076 if (*lvalp > (unsigned long) INT_MAX + 1) 2077 return -EINVAL; 2078 *valp = -*lvalp; 2079 } else { 2080 if (*lvalp > (unsigned long) INT_MAX) 2081 return -EINVAL; 2082 *valp = *lvalp; 2083 } 2084 } else { 2085 int val = *valp; 2086 if (val < 0) { 2087 *negp = true; 2088 *lvalp = -(unsigned long)val; 2089 } else { 2090 *negp = false; 2091 *lvalp = (unsigned long)val; 2092 } 2093 } 2094 return 0; 2095 } 2096 2097 static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; 2098 2099 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, 2100 int write, void __user *buffer, 2101 size_t *lenp, loff_t *ppos, 2102 int (*conv)(bool *negp, unsigned long *lvalp, int *valp, 2103 int write, void *data), 2104 void *data) 2105 { 2106 int *i, vleft, first = 1, err = 0; 2107 size_t left; 2108 char *kbuf = NULL, *p; 2109 2110 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { 2111 *lenp = 0; 2112 return 0; 2113 } 2114 2115 i = (int *) tbl_data; 2116 vleft = table->maxlen / sizeof(*i); 2117 left = *lenp; 2118 2119 if (!conv) 2120 conv = do_proc_dointvec_conv; 2121 2122 if (write) { 2123 if (*ppos) { 2124 switch (sysctl_writes_strict) { 2125 case SYSCTL_WRITES_STRICT: 2126 goto out; 2127 case SYSCTL_WRITES_WARN: 2128 warn_sysctl_write(table); 2129 break; 2130 default: 2131 break; 2132 } 2133 } 2134 2135 if (left > PAGE_SIZE - 1) 2136 left = PAGE_SIZE - 1; 2137 p = kbuf = memdup_user_nul(buffer, left); 2138 if (IS_ERR(kbuf)) 2139 return PTR_ERR(kbuf); 2140 } 2141 2142 for (; left && vleft--; i++, first=0) { 2143 unsigned long lval; 2144 bool neg; 2145 2146 if (write) { 2147 left -= proc_skip_spaces(&p); 2148 2149 if (!left) 2150 break; 2151 err = proc_get_long(&p, &left, &lval, &neg, 2152 proc_wspace_sep, 2153 sizeof(proc_wspace_sep), NULL); 2154 if (err) 2155 break; 2156 if (conv(&neg, &lval, i, 1, data)) { 2157 err = -EINVAL; 2158 break; 2159 } 2160 } else { 2161 if (conv(&neg, &lval, i, 0, data)) { 2162 err = -EINVAL; 2163 break; 2164 } 2165 if (!first) 2166 err = proc_put_char(&buffer, &left, '\t'); 2167 if (err) 2168 break; 2169 err = proc_put_long(&buffer, &left, lval, neg); 2170 if (err) 2171 break; 2172 } 2173 } 2174 2175 if (!write && !first && left && !err) 2176 err = proc_put_char(&buffer, &left, '\n'); 2177 if (write && !err && left) 2178 left -= proc_skip_spaces(&p); 2179 if (write) { 2180 kfree(kbuf); 2181 if (first) 2182 return err ? : -EINVAL; 2183 } 2184 *lenp -= left; 2185 out: 2186 *ppos += *lenp; 2187 return err; 2188 } 2189 2190 static int do_proc_dointvec(struct ctl_table *table, int write, 2191 void __user *buffer, size_t *lenp, loff_t *ppos, 2192 int (*conv)(bool *negp, unsigned long *lvalp, int *valp, 2193 int write, void *data), 2194 void *data) 2195 { 2196 return __do_proc_dointvec(table->data, table, write, 2197 buffer, lenp, ppos, conv, data); 2198 } 2199 2200 /** 2201 * proc_dointvec - read a vector of integers 2202 * @table: the sysctl table 2203 * @write: %TRUE if this is a write to the sysctl file 2204 * @buffer: the user buffer 2205 * @lenp: the size of the user buffer 2206 * @ppos: file position 2207 * 2208 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2209 * values from/to the user buffer, treated as an ASCII string. 2210 * 2211 * Returns 0 on success. 2212 */ 2213 int proc_dointvec(struct ctl_table *table, int write, 2214 void __user *buffer, size_t *lenp, loff_t *ppos) 2215 { 2216 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2217 NULL,NULL); 2218 } 2219 2220 /* 2221 * Taint values can only be increased 2222 * This means we can safely use a temporary. 2223 */ 2224 static int proc_taint(struct ctl_table *table, int write, 2225 void __user *buffer, size_t *lenp, loff_t *ppos) 2226 { 2227 struct ctl_table t; 2228 unsigned long tmptaint = get_taint(); 2229 int err; 2230 2231 if (write && !capable(CAP_SYS_ADMIN)) 2232 return -EPERM; 2233 2234 t = *table; 2235 t.data = &tmptaint; 2236 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); 2237 if (err < 0) 2238 return err; 2239 2240 if (write) { 2241 /* 2242 * Poor man's atomic or. Not worth adding a primitive 2243 * to everyone's atomic.h for this 2244 */ 2245 int i; 2246 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { 2247 if ((tmptaint >> i) & 1) 2248 add_taint(i, LOCKDEP_STILL_OK); 2249 } 2250 } 2251 2252 return err; 2253 } 2254 2255 #ifdef CONFIG_PRINTK 2256 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, 2257 void __user *buffer, size_t *lenp, loff_t *ppos) 2258 { 2259 if (write && !capable(CAP_SYS_ADMIN)) 2260 return -EPERM; 2261 2262 return proc_dointvec_minmax(table, write, buffer, lenp, ppos); 2263 } 2264 #endif 2265 2266 struct do_proc_dointvec_minmax_conv_param { 2267 int *min; 2268 int *max; 2269 }; 2270 2271 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, 2272 int *valp, 2273 int write, void *data) 2274 { 2275 struct do_proc_dointvec_minmax_conv_param *param = data; 2276 if (write) { 2277 int val = *negp ? -*lvalp : *lvalp; 2278 if ((param->min && *param->min > val) || 2279 (param->max && *param->max < val)) 2280 return -EINVAL; 2281 *valp = val; 2282 } else { 2283 int val = *valp; 2284 if (val < 0) { 2285 *negp = true; 2286 *lvalp = -(unsigned long)val; 2287 } else { 2288 *negp = false; 2289 *lvalp = (unsigned long)val; 2290 } 2291 } 2292 return 0; 2293 } 2294 2295 /** 2296 * proc_dointvec_minmax - read a vector of integers with min/max values 2297 * @table: the sysctl table 2298 * @write: %TRUE if this is a write to the sysctl file 2299 * @buffer: the user buffer 2300 * @lenp: the size of the user buffer 2301 * @ppos: file position 2302 * 2303 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2304 * values from/to the user buffer, treated as an ASCII string. 2305 * 2306 * This routine will ensure the values are within the range specified by 2307 * table->extra1 (min) and table->extra2 (max). 2308 * 2309 * Returns 0 on success. 2310 */ 2311 int proc_dointvec_minmax(struct ctl_table *table, int write, 2312 void __user *buffer, size_t *lenp, loff_t *ppos) 2313 { 2314 struct do_proc_dointvec_minmax_conv_param param = { 2315 .min = (int *) table->extra1, 2316 .max = (int *) table->extra2, 2317 }; 2318 return do_proc_dointvec(table, write, buffer, lenp, ppos, 2319 do_proc_dointvec_minmax_conv, ¶m); 2320 } 2321 2322 static void validate_coredump_safety(void) 2323 { 2324 #ifdef CONFIG_COREDUMP 2325 if (suid_dumpable == SUID_DUMP_ROOT && 2326 core_pattern[0] != '/' && core_pattern[0] != '|') { 2327 printk(KERN_WARNING "Unsafe core_pattern used with "\ 2328 "suid_dumpable=2. Pipe handler or fully qualified "\ 2329 "core dump path required.\n"); 2330 } 2331 #endif 2332 } 2333 2334 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, 2335 void __user *buffer, size_t *lenp, loff_t *ppos) 2336 { 2337 int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); 2338 if (!error) 2339 validate_coredump_safety(); 2340 return error; 2341 } 2342 2343 #ifdef CONFIG_COREDUMP 2344 static int proc_dostring_coredump(struct ctl_table *table, int write, 2345 void __user *buffer, size_t *lenp, loff_t *ppos) 2346 { 2347 int error = proc_dostring(table, write, buffer, lenp, ppos); 2348 if (!error) 2349 validate_coredump_safety(); 2350 return error; 2351 } 2352 #endif 2353 2354 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, 2355 void __user *buffer, 2356 size_t *lenp, loff_t *ppos, 2357 unsigned long convmul, 2358 unsigned long convdiv) 2359 { 2360 unsigned long *i, *min, *max; 2361 int vleft, first = 1, err = 0; 2362 size_t left; 2363 char *kbuf = NULL, *p; 2364 2365 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { 2366 *lenp = 0; 2367 return 0; 2368 } 2369 2370 i = (unsigned long *) data; 2371 min = (unsigned long *) table->extra1; 2372 max = (unsigned long *) table->extra2; 2373 vleft = table->maxlen / sizeof(unsigned long); 2374 left = *lenp; 2375 2376 if (write) { 2377 if (*ppos) { 2378 switch (sysctl_writes_strict) { 2379 case SYSCTL_WRITES_STRICT: 2380 goto out; 2381 case SYSCTL_WRITES_WARN: 2382 warn_sysctl_write(table); 2383 break; 2384 default: 2385 break; 2386 } 2387 } 2388 2389 if (left > PAGE_SIZE - 1) 2390 left = PAGE_SIZE - 1; 2391 p = kbuf = memdup_user_nul(buffer, left); 2392 if (IS_ERR(kbuf)) 2393 return PTR_ERR(kbuf); 2394 } 2395 2396 for (; left && vleft--; i++, first = 0) { 2397 unsigned long val; 2398 2399 if (write) { 2400 bool neg; 2401 2402 left -= proc_skip_spaces(&p); 2403 2404 err = proc_get_long(&p, &left, &val, &neg, 2405 proc_wspace_sep, 2406 sizeof(proc_wspace_sep), NULL); 2407 if (err) 2408 break; 2409 if (neg) 2410 continue; 2411 if ((min && val < *min) || (max && val > *max)) 2412 continue; 2413 *i = val; 2414 } else { 2415 val = convdiv * (*i) / convmul; 2416 if (!first) { 2417 err = proc_put_char(&buffer, &left, '\t'); 2418 if (err) 2419 break; 2420 } 2421 err = proc_put_long(&buffer, &left, val, false); 2422 if (err) 2423 break; 2424 } 2425 } 2426 2427 if (!write && !first && left && !err) 2428 err = proc_put_char(&buffer, &left, '\n'); 2429 if (write && !err) 2430 left -= proc_skip_spaces(&p); 2431 if (write) { 2432 kfree(kbuf); 2433 if (first) 2434 return err ? : -EINVAL; 2435 } 2436 *lenp -= left; 2437 out: 2438 *ppos += *lenp; 2439 return err; 2440 } 2441 2442 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, 2443 void __user *buffer, 2444 size_t *lenp, loff_t *ppos, 2445 unsigned long convmul, 2446 unsigned long convdiv) 2447 { 2448 return __do_proc_doulongvec_minmax(table->data, table, write, 2449 buffer, lenp, ppos, convmul, convdiv); 2450 } 2451 2452 /** 2453 * proc_doulongvec_minmax - read a vector of long integers with min/max values 2454 * @table: the sysctl table 2455 * @write: %TRUE if this is a write to the sysctl file 2456 * @buffer: the user buffer 2457 * @lenp: the size of the user buffer 2458 * @ppos: file position 2459 * 2460 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long 2461 * values from/to the user buffer, treated as an ASCII string. 2462 * 2463 * This routine will ensure the values are within the range specified by 2464 * table->extra1 (min) and table->extra2 (max). 2465 * 2466 * Returns 0 on success. 2467 */ 2468 int proc_doulongvec_minmax(struct ctl_table *table, int write, 2469 void __user *buffer, size_t *lenp, loff_t *ppos) 2470 { 2471 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); 2472 } 2473 2474 /** 2475 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values 2476 * @table: the sysctl table 2477 * @write: %TRUE if this is a write to the sysctl file 2478 * @buffer: the user buffer 2479 * @lenp: the size of the user buffer 2480 * @ppos: file position 2481 * 2482 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long 2483 * values from/to the user buffer, treated as an ASCII string. The values 2484 * are treated as milliseconds, and converted to jiffies when they are stored. 2485 * 2486 * This routine will ensure the values are within the range specified by 2487 * table->extra1 (min) and table->extra2 (max). 2488 * 2489 * Returns 0 on success. 2490 */ 2491 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, 2492 void __user *buffer, 2493 size_t *lenp, loff_t *ppos) 2494 { 2495 return do_proc_doulongvec_minmax(table, write, buffer, 2496 lenp, ppos, HZ, 1000l); 2497 } 2498 2499 2500 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, 2501 int *valp, 2502 int write, void *data) 2503 { 2504 if (write) { 2505 if (*lvalp > LONG_MAX / HZ) 2506 return 1; 2507 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); 2508 } else { 2509 int val = *valp; 2510 unsigned long lval; 2511 if (val < 0) { 2512 *negp = true; 2513 lval = -(unsigned long)val; 2514 } else { 2515 *negp = false; 2516 lval = (unsigned long)val; 2517 } 2518 *lvalp = lval / HZ; 2519 } 2520 return 0; 2521 } 2522 2523 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, 2524 int *valp, 2525 int write, void *data) 2526 { 2527 if (write) { 2528 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) 2529 return 1; 2530 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); 2531 } else { 2532 int val = *valp; 2533 unsigned long lval; 2534 if (val < 0) { 2535 *negp = true; 2536 lval = -(unsigned long)val; 2537 } else { 2538 *negp = false; 2539 lval = (unsigned long)val; 2540 } 2541 *lvalp = jiffies_to_clock_t(lval); 2542 } 2543 return 0; 2544 } 2545 2546 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, 2547 int *valp, 2548 int write, void *data) 2549 { 2550 if (write) { 2551 unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); 2552 2553 if (jif > INT_MAX) 2554 return 1; 2555 *valp = (int)jif; 2556 } else { 2557 int val = *valp; 2558 unsigned long lval; 2559 if (val < 0) { 2560 *negp = true; 2561 lval = -(unsigned long)val; 2562 } else { 2563 *negp = false; 2564 lval = (unsigned long)val; 2565 } 2566 *lvalp = jiffies_to_msecs(lval); 2567 } 2568 return 0; 2569 } 2570 2571 /** 2572 * proc_dointvec_jiffies - read a vector of integers as seconds 2573 * @table: the sysctl table 2574 * @write: %TRUE if this is a write to the sysctl file 2575 * @buffer: the user buffer 2576 * @lenp: the size of the user buffer 2577 * @ppos: file position 2578 * 2579 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2580 * values from/to the user buffer, treated as an ASCII string. 2581 * The values read are assumed to be in seconds, and are converted into 2582 * jiffies. 2583 * 2584 * Returns 0 on success. 2585 */ 2586 int proc_dointvec_jiffies(struct ctl_table *table, int write, 2587 void __user *buffer, size_t *lenp, loff_t *ppos) 2588 { 2589 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2590 do_proc_dointvec_jiffies_conv,NULL); 2591 } 2592 2593 /** 2594 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds 2595 * @table: the sysctl table 2596 * @write: %TRUE if this is a write to the sysctl file 2597 * @buffer: the user buffer 2598 * @lenp: the size of the user buffer 2599 * @ppos: pointer to the file position 2600 * 2601 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2602 * values from/to the user buffer, treated as an ASCII string. 2603 * The values read are assumed to be in 1/USER_HZ seconds, and 2604 * are converted into jiffies. 2605 * 2606 * Returns 0 on success. 2607 */ 2608 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, 2609 void __user *buffer, size_t *lenp, loff_t *ppos) 2610 { 2611 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2612 do_proc_dointvec_userhz_jiffies_conv,NULL); 2613 } 2614 2615 /** 2616 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds 2617 * @table: the sysctl table 2618 * @write: %TRUE if this is a write to the sysctl file 2619 * @buffer: the user buffer 2620 * @lenp: the size of the user buffer 2621 * @ppos: file position 2622 * @ppos: the current position in the file 2623 * 2624 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2625 * values from/to the user buffer, treated as an ASCII string. 2626 * The values read are assumed to be in 1/1000 seconds, and 2627 * are converted into jiffies. 2628 * 2629 * Returns 0 on success. 2630 */ 2631 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, 2632 void __user *buffer, size_t *lenp, loff_t *ppos) 2633 { 2634 return do_proc_dointvec(table, write, buffer, lenp, ppos, 2635 do_proc_dointvec_ms_jiffies_conv, NULL); 2636 } 2637 2638 static int proc_do_cad_pid(struct ctl_table *table, int write, 2639 void __user *buffer, size_t *lenp, loff_t *ppos) 2640 { 2641 struct pid *new_pid; 2642 pid_t tmp; 2643 int r; 2644 2645 tmp = pid_vnr(cad_pid); 2646 2647 r = __do_proc_dointvec(&tmp, table, write, buffer, 2648 lenp, ppos, NULL, NULL); 2649 if (r || !write) 2650 return r; 2651 2652 new_pid = find_get_pid(tmp); 2653 if (!new_pid) 2654 return -ESRCH; 2655 2656 put_pid(xchg(&cad_pid, new_pid)); 2657 return 0; 2658 } 2659 2660 /** 2661 * proc_do_large_bitmap - read/write from/to a large bitmap 2662 * @table: the sysctl table 2663 * @write: %TRUE if this is a write to the sysctl file 2664 * @buffer: the user buffer 2665 * @lenp: the size of the user buffer 2666 * @ppos: file position 2667 * 2668 * The bitmap is stored at table->data and the bitmap length (in bits) 2669 * in table->maxlen. 2670 * 2671 * We use a range comma separated format (e.g. 1,3-4,10-10) so that 2672 * large bitmaps may be represented in a compact manner. Writing into 2673 * the file will clear the bitmap then update it with the given input. 2674 * 2675 * Returns 0 on success. 2676 */ 2677 int proc_do_large_bitmap(struct ctl_table *table, int write, 2678 void __user *buffer, size_t *lenp, loff_t *ppos) 2679 { 2680 int err = 0; 2681 bool first = 1; 2682 size_t left = *lenp; 2683 unsigned long bitmap_len = table->maxlen; 2684 unsigned long *bitmap = *(unsigned long **) table->data; 2685 unsigned long *tmp_bitmap = NULL; 2686 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; 2687 2688 if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { 2689 *lenp = 0; 2690 return 0; 2691 } 2692 2693 if (write) { 2694 char *kbuf, *p; 2695 2696 if (left > PAGE_SIZE - 1) 2697 left = PAGE_SIZE - 1; 2698 2699 p = kbuf = memdup_user_nul(buffer, left); 2700 if (IS_ERR(kbuf)) 2701 return PTR_ERR(kbuf); 2702 2703 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), 2704 GFP_KERNEL); 2705 if (!tmp_bitmap) { 2706 kfree(kbuf); 2707 return -ENOMEM; 2708 } 2709 proc_skip_char(&p, &left, '\n'); 2710 while (!err && left) { 2711 unsigned long val_a, val_b; 2712 bool neg; 2713 2714 err = proc_get_long(&p, &left, &val_a, &neg, tr_a, 2715 sizeof(tr_a), &c); 2716 if (err) 2717 break; 2718 if (val_a >= bitmap_len || neg) { 2719 err = -EINVAL; 2720 break; 2721 } 2722 2723 val_b = val_a; 2724 if (left) { 2725 p++; 2726 left--; 2727 } 2728 2729 if (c == '-') { 2730 err = proc_get_long(&p, &left, &val_b, 2731 &neg, tr_b, sizeof(tr_b), 2732 &c); 2733 if (err) 2734 break; 2735 if (val_b >= bitmap_len || neg || 2736 val_a > val_b) { 2737 err = -EINVAL; 2738 break; 2739 } 2740 if (left) { 2741 p++; 2742 left--; 2743 } 2744 } 2745 2746 bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); 2747 first = 0; 2748 proc_skip_char(&p, &left, '\n'); 2749 } 2750 kfree(kbuf); 2751 } else { 2752 unsigned long bit_a, bit_b = 0; 2753 2754 while (left) { 2755 bit_a = find_next_bit(bitmap, bitmap_len, bit_b); 2756 if (bit_a >= bitmap_len) 2757 break; 2758 bit_b = find_next_zero_bit(bitmap, bitmap_len, 2759 bit_a + 1) - 1; 2760 2761 if (!first) { 2762 err = proc_put_char(&buffer, &left, ','); 2763 if (err) 2764 break; 2765 } 2766 err = proc_put_long(&buffer, &left, bit_a, false); 2767 if (err) 2768 break; 2769 if (bit_a != bit_b) { 2770 err = proc_put_char(&buffer, &left, '-'); 2771 if (err) 2772 break; 2773 err = proc_put_long(&buffer, &left, bit_b, false); 2774 if (err) 2775 break; 2776 } 2777 2778 first = 0; bit_b++; 2779 } 2780 if (!err) 2781 err = proc_put_char(&buffer, &left, '\n'); 2782 } 2783 2784 if (!err) { 2785 if (write) { 2786 if (*ppos) 2787 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); 2788 else 2789 bitmap_copy(bitmap, tmp_bitmap, bitmap_len); 2790 } 2791 kfree(tmp_bitmap); 2792 *lenp -= left; 2793 *ppos += *lenp; 2794 return 0; 2795 } else { 2796 kfree(tmp_bitmap); 2797 return err; 2798 } 2799 } 2800 2801 #else /* CONFIG_PROC_SYSCTL */ 2802 2803 int proc_dostring(struct ctl_table *table, int write, 2804 void __user *buffer, size_t *lenp, loff_t *ppos) 2805 { 2806 return -ENOSYS; 2807 } 2808 2809 int proc_dointvec(struct ctl_table *table, int write, 2810 void __user *buffer, size_t *lenp, loff_t *ppos) 2811 { 2812 return -ENOSYS; 2813 } 2814 2815 int proc_dointvec_minmax(struct ctl_table *table, int write, 2816 void __user *buffer, size_t *lenp, loff_t *ppos) 2817 { 2818 return -ENOSYS; 2819 } 2820 2821 int proc_dointvec_jiffies(struct ctl_table *table, int write, 2822 void __user *buffer, size_t *lenp, loff_t *ppos) 2823 { 2824 return -ENOSYS; 2825 } 2826 2827 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, 2828 void __user *buffer, size_t *lenp, loff_t *ppos) 2829 { 2830 return -ENOSYS; 2831 } 2832 2833 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, 2834 void __user *buffer, size_t *lenp, loff_t *ppos) 2835 { 2836 return -ENOSYS; 2837 } 2838 2839 int proc_doulongvec_minmax(struct ctl_table *table, int write, 2840 void __user *buffer, size_t *lenp, loff_t *ppos) 2841 { 2842 return -ENOSYS; 2843 } 2844 2845 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, 2846 void __user *buffer, 2847 size_t *lenp, loff_t *ppos) 2848 { 2849 return -ENOSYS; 2850 } 2851 2852 2853 #endif /* CONFIG_PROC_SYSCTL */ 2854 2855 /* 2856 * No sense putting this after each symbol definition, twice, 2857 * exception granted :-) 2858 */ 2859 EXPORT_SYMBOL(proc_dointvec); 2860 EXPORT_SYMBOL(proc_dointvec_jiffies); 2861 EXPORT_SYMBOL(proc_dointvec_minmax); 2862 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); 2863 EXPORT_SYMBOL(proc_dointvec_ms_jiffies); 2864 EXPORT_SYMBOL(proc_dostring); 2865 EXPORT_SYMBOL(proc_doulongvec_minmax); 2866 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); 2867