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 = NULL, /* filled in by handler */ 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 #endif 1160 #ifdef CONFIG_KMEMCHECK 1161 { 1162 .procname = "kmemcheck", 1163 .data = &kmemcheck_enabled, 1164 .maxlen = sizeof(int), 1165 .mode = 0644, 1166 .proc_handler = proc_dointvec, 1167 }, 1168 #endif 1169 { 1170 .procname = "panic_on_warn", 1171 .data = &panic_on_warn, 1172 .maxlen = sizeof(int), 1173 .mode = 0644, 1174 .proc_handler = proc_dointvec_minmax, 1175 .extra1 = &zero, 1176 .extra2 = &one, 1177 }, 1178 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON) 1179 { 1180 .procname = "timer_migration", 1181 .data = &sysctl_timer_migration, 1182 .maxlen = sizeof(unsigned int), 1183 .mode = 0644, 1184 .proc_handler = timer_migration_handler, 1185 }, 1186 #endif 1187 #ifdef CONFIG_BPF_SYSCALL 1188 { 1189 .procname = "unprivileged_bpf_disabled", 1190 .data = &sysctl_unprivileged_bpf_disabled, 1191 .maxlen = sizeof(sysctl_unprivileged_bpf_disabled), 1192 .mode = 0644, 1193 /* only handle a transition from default "0" to "1" */ 1194 .proc_handler = proc_dointvec_minmax, 1195 .extra1 = &one, 1196 .extra2 = &one, 1197 }, 1198 #endif 1199 { } 1200 }; 1201 1202 static struct ctl_table vm_table[] = { 1203 { 1204 .procname = "overcommit_memory", 1205 .data = &sysctl_overcommit_memory, 1206 .maxlen = sizeof(sysctl_overcommit_memory), 1207 .mode = 0644, 1208 .proc_handler = proc_dointvec_minmax, 1209 .extra1 = &zero, 1210 .extra2 = &two, 1211 }, 1212 { 1213 .procname = "panic_on_oom", 1214 .data = &sysctl_panic_on_oom, 1215 .maxlen = sizeof(sysctl_panic_on_oom), 1216 .mode = 0644, 1217 .proc_handler = proc_dointvec_minmax, 1218 .extra1 = &zero, 1219 .extra2 = &two, 1220 }, 1221 { 1222 .procname = "oom_kill_allocating_task", 1223 .data = &sysctl_oom_kill_allocating_task, 1224 .maxlen = sizeof(sysctl_oom_kill_allocating_task), 1225 .mode = 0644, 1226 .proc_handler = proc_dointvec, 1227 }, 1228 { 1229 .procname = "oom_dump_tasks", 1230 .data = &sysctl_oom_dump_tasks, 1231 .maxlen = sizeof(sysctl_oom_dump_tasks), 1232 .mode = 0644, 1233 .proc_handler = proc_dointvec, 1234 }, 1235 { 1236 .procname = "overcommit_ratio", 1237 .data = &sysctl_overcommit_ratio, 1238 .maxlen = sizeof(sysctl_overcommit_ratio), 1239 .mode = 0644, 1240 .proc_handler = overcommit_ratio_handler, 1241 }, 1242 { 1243 .procname = "overcommit_kbytes", 1244 .data = &sysctl_overcommit_kbytes, 1245 .maxlen = sizeof(sysctl_overcommit_kbytes), 1246 .mode = 0644, 1247 .proc_handler = overcommit_kbytes_handler, 1248 }, 1249 { 1250 .procname = "page-cluster", 1251 .data = &page_cluster, 1252 .maxlen = sizeof(int), 1253 .mode = 0644, 1254 .proc_handler = proc_dointvec_minmax, 1255 .extra1 = &zero, 1256 }, 1257 { 1258 .procname = "dirty_background_ratio", 1259 .data = &dirty_background_ratio, 1260 .maxlen = sizeof(dirty_background_ratio), 1261 .mode = 0644, 1262 .proc_handler = dirty_background_ratio_handler, 1263 .extra1 = &zero, 1264 .extra2 = &one_hundred, 1265 }, 1266 { 1267 .procname = "dirty_background_bytes", 1268 .data = &dirty_background_bytes, 1269 .maxlen = sizeof(dirty_background_bytes), 1270 .mode = 0644, 1271 .proc_handler = dirty_background_bytes_handler, 1272 .extra1 = &one_ul, 1273 }, 1274 { 1275 .procname = "dirty_ratio", 1276 .data = &vm_dirty_ratio, 1277 .maxlen = sizeof(vm_dirty_ratio), 1278 .mode = 0644, 1279 .proc_handler = dirty_ratio_handler, 1280 .extra1 = &zero, 1281 .extra2 = &one_hundred, 1282 }, 1283 { 1284 .procname = "dirty_bytes", 1285 .data = &vm_dirty_bytes, 1286 .maxlen = sizeof(vm_dirty_bytes), 1287 .mode = 0644, 1288 .proc_handler = dirty_bytes_handler, 1289 .extra1 = &dirty_bytes_min, 1290 }, 1291 { 1292 .procname = "dirty_writeback_centisecs", 1293 .data = &dirty_writeback_interval, 1294 .maxlen = sizeof(dirty_writeback_interval), 1295 .mode = 0644, 1296 .proc_handler = dirty_writeback_centisecs_handler, 1297 }, 1298 { 1299 .procname = "dirty_expire_centisecs", 1300 .data = &dirty_expire_interval, 1301 .maxlen = sizeof(dirty_expire_interval), 1302 .mode = 0644, 1303 .proc_handler = proc_dointvec_minmax, 1304 .extra1 = &zero, 1305 }, 1306 { 1307 .procname = "dirtytime_expire_seconds", 1308 .data = &dirtytime_expire_interval, 1309 .maxlen = sizeof(dirty_expire_interval), 1310 .mode = 0644, 1311 .proc_handler = dirtytime_interval_handler, 1312 .extra1 = &zero, 1313 }, 1314 { 1315 .procname = "nr_pdflush_threads", 1316 .mode = 0444 /* read-only */, 1317 .proc_handler = pdflush_proc_obsolete, 1318 }, 1319 { 1320 .procname = "swappiness", 1321 .data = &vm_swappiness, 1322 .maxlen = sizeof(vm_swappiness), 1323 .mode = 0644, 1324 .proc_handler = proc_dointvec_minmax, 1325 .extra1 = &zero, 1326 .extra2 = &one_hundred, 1327 }, 1328 #ifdef CONFIG_HUGETLB_PAGE 1329 { 1330 .procname = "nr_hugepages", 1331 .data = NULL, 1332 .maxlen = sizeof(unsigned long), 1333 .mode = 0644, 1334 .proc_handler = hugetlb_sysctl_handler, 1335 }, 1336 #ifdef CONFIG_NUMA 1337 { 1338 .procname = "nr_hugepages_mempolicy", 1339 .data = NULL, 1340 .maxlen = sizeof(unsigned long), 1341 .mode = 0644, 1342 .proc_handler = &hugetlb_mempolicy_sysctl_handler, 1343 }, 1344 #endif 1345 { 1346 .procname = "hugetlb_shm_group", 1347 .data = &sysctl_hugetlb_shm_group, 1348 .maxlen = sizeof(gid_t), 1349 .mode = 0644, 1350 .proc_handler = proc_dointvec, 1351 }, 1352 { 1353 .procname = "hugepages_treat_as_movable", 1354 .data = &hugepages_treat_as_movable, 1355 .maxlen = sizeof(int), 1356 .mode = 0644, 1357 .proc_handler = proc_dointvec, 1358 }, 1359 { 1360 .procname = "nr_overcommit_hugepages", 1361 .data = NULL, 1362 .maxlen = sizeof(unsigned long), 1363 .mode = 0644, 1364 .proc_handler = hugetlb_overcommit_handler, 1365 }, 1366 #endif 1367 { 1368 .procname = "lowmem_reserve_ratio", 1369 .data = &sysctl_lowmem_reserve_ratio, 1370 .maxlen = sizeof(sysctl_lowmem_reserve_ratio), 1371 .mode = 0644, 1372 .proc_handler = lowmem_reserve_ratio_sysctl_handler, 1373 }, 1374 { 1375 .procname = "drop_caches", 1376 .data = &sysctl_drop_caches, 1377 .maxlen = sizeof(int), 1378 .mode = 0644, 1379 .proc_handler = drop_caches_sysctl_handler, 1380 .extra1 = &one, 1381 .extra2 = &four, 1382 }, 1383 #ifdef CONFIG_COMPACTION 1384 { 1385 .procname = "compact_memory", 1386 .data = &sysctl_compact_memory, 1387 .maxlen = sizeof(int), 1388 .mode = 0200, 1389 .proc_handler = sysctl_compaction_handler, 1390 }, 1391 { 1392 .procname = "extfrag_threshold", 1393 .data = &sysctl_extfrag_threshold, 1394 .maxlen = sizeof(int), 1395 .mode = 0644, 1396 .proc_handler = sysctl_extfrag_handler, 1397 .extra1 = &min_extfrag_threshold, 1398 .extra2 = &max_extfrag_threshold, 1399 }, 1400 { 1401 .procname = "compact_unevictable_allowed", 1402 .data = &sysctl_compact_unevictable_allowed, 1403 .maxlen = sizeof(int), 1404 .mode = 0644, 1405 .proc_handler = proc_dointvec, 1406 .extra1 = &zero, 1407 .extra2 = &one, 1408 }, 1409 1410 #endif /* CONFIG_COMPACTION */ 1411 { 1412 .procname = "min_free_kbytes", 1413 .data = &min_free_kbytes, 1414 .maxlen = sizeof(min_free_kbytes), 1415 .mode = 0644, 1416 .proc_handler = min_free_kbytes_sysctl_handler, 1417 .extra1 = &zero, 1418 }, 1419 { 1420 .procname = "watermark_scale_factor", 1421 .data = &watermark_scale_factor, 1422 .maxlen = sizeof(watermark_scale_factor), 1423 .mode = 0644, 1424 .proc_handler = watermark_scale_factor_sysctl_handler, 1425 .extra1 = &one, 1426 .extra2 = &one_thousand, 1427 }, 1428 { 1429 .procname = "percpu_pagelist_fraction", 1430 .data = &percpu_pagelist_fraction, 1431 .maxlen = sizeof(percpu_pagelist_fraction), 1432 .mode = 0644, 1433 .proc_handler = percpu_pagelist_fraction_sysctl_handler, 1434 .extra1 = &zero, 1435 }, 1436 #ifdef CONFIG_MMU 1437 { 1438 .procname = "max_map_count", 1439 .data = &sysctl_max_map_count, 1440 .maxlen = sizeof(sysctl_max_map_count), 1441 .mode = 0644, 1442 .proc_handler = proc_dointvec_minmax, 1443 .extra1 = &zero, 1444 }, 1445 #else 1446 { 1447 .procname = "nr_trim_pages", 1448 .data = &sysctl_nr_trim_pages, 1449 .maxlen = sizeof(sysctl_nr_trim_pages), 1450 .mode = 0644, 1451 .proc_handler = proc_dointvec_minmax, 1452 .extra1 = &zero, 1453 }, 1454 #endif 1455 { 1456 .procname = "laptop_mode", 1457 .data = &laptop_mode, 1458 .maxlen = sizeof(laptop_mode), 1459 .mode = 0644, 1460 .proc_handler = proc_dointvec_jiffies, 1461 }, 1462 { 1463 .procname = "block_dump", 1464 .data = &block_dump, 1465 .maxlen = sizeof(block_dump), 1466 .mode = 0644, 1467 .proc_handler = proc_dointvec, 1468 .extra1 = &zero, 1469 }, 1470 { 1471 .procname = "vfs_cache_pressure", 1472 .data = &sysctl_vfs_cache_pressure, 1473 .maxlen = sizeof(sysctl_vfs_cache_pressure), 1474 .mode = 0644, 1475 .proc_handler = proc_dointvec, 1476 .extra1 = &zero, 1477 }, 1478 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT 1479 { 1480 .procname = "legacy_va_layout", 1481 .data = &sysctl_legacy_va_layout, 1482 .maxlen = sizeof(sysctl_legacy_va_layout), 1483 .mode = 0644, 1484 .proc_handler = proc_dointvec, 1485 .extra1 = &zero, 1486 }, 1487 #endif 1488 #ifdef CONFIG_NUMA 1489 { 1490 .procname = "zone_reclaim_mode", 1491 .data = &zone_reclaim_mode, 1492 .maxlen = sizeof(zone_reclaim_mode), 1493 .mode = 0644, 1494 .proc_handler = proc_dointvec, 1495 .extra1 = &zero, 1496 }, 1497 { 1498 .procname = "min_unmapped_ratio", 1499 .data = &sysctl_min_unmapped_ratio, 1500 .maxlen = sizeof(sysctl_min_unmapped_ratio), 1501 .mode = 0644, 1502 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, 1503 .extra1 = &zero, 1504 .extra2 = &one_hundred, 1505 }, 1506 { 1507 .procname = "min_slab_ratio", 1508 .data = &sysctl_min_slab_ratio, 1509 .maxlen = sizeof(sysctl_min_slab_ratio), 1510 .mode = 0644, 1511 .proc_handler = sysctl_min_slab_ratio_sysctl_handler, 1512 .extra1 = &zero, 1513 .extra2 = &one_hundred, 1514 }, 1515 #endif 1516 #ifdef CONFIG_SMP 1517 { 1518 .procname = "stat_interval", 1519 .data = &sysctl_stat_interval, 1520 .maxlen = sizeof(sysctl_stat_interval), 1521 .mode = 0644, 1522 .proc_handler = proc_dointvec_jiffies, 1523 }, 1524 #endif 1525 #ifdef CONFIG_MMU 1526 { 1527 .procname = "mmap_min_addr", 1528 .data = &dac_mmap_min_addr, 1529 .maxlen = sizeof(unsigned long), 1530 .mode = 0644, 1531 .proc_handler = mmap_min_addr_handler, 1532 }, 1533 #endif 1534 #ifdef CONFIG_NUMA 1535 { 1536 .procname = "numa_zonelist_order", 1537 .data = &numa_zonelist_order, 1538 .maxlen = NUMA_ZONELIST_ORDER_LEN, 1539 .mode = 0644, 1540 .proc_handler = numa_zonelist_order_handler, 1541 }, 1542 #endif 1543 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ 1544 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) 1545 { 1546 .procname = "vdso_enabled", 1547 #ifdef CONFIG_X86_32 1548 .data = &vdso32_enabled, 1549 .maxlen = sizeof(vdso32_enabled), 1550 #else 1551 .data = &vdso_enabled, 1552 .maxlen = sizeof(vdso_enabled), 1553 #endif 1554 .mode = 0644, 1555 .proc_handler = proc_dointvec, 1556 .extra1 = &zero, 1557 }, 1558 #endif 1559 #ifdef CONFIG_HIGHMEM 1560 { 1561 .procname = "highmem_is_dirtyable", 1562 .data = &vm_highmem_is_dirtyable, 1563 .maxlen = sizeof(vm_highmem_is_dirtyable), 1564 .mode = 0644, 1565 .proc_handler = proc_dointvec_minmax, 1566 .extra1 = &zero, 1567 .extra2 = &one, 1568 }, 1569 #endif 1570 #ifdef CONFIG_MEMORY_FAILURE 1571 { 1572 .procname = "memory_failure_early_kill", 1573 .data = &sysctl_memory_failure_early_kill, 1574 .maxlen = sizeof(sysctl_memory_failure_early_kill), 1575 .mode = 0644, 1576 .proc_handler = proc_dointvec_minmax, 1577 .extra1 = &zero, 1578 .extra2 = &one, 1579 }, 1580 { 1581 .procname = "memory_failure_recovery", 1582 .data = &sysctl_memory_failure_recovery, 1583 .maxlen = sizeof(sysctl_memory_failure_recovery), 1584 .mode = 0644, 1585 .proc_handler = proc_dointvec_minmax, 1586 .extra1 = &zero, 1587 .extra2 = &one, 1588 }, 1589 #endif 1590 { 1591 .procname = "user_reserve_kbytes", 1592 .data = &sysctl_user_reserve_kbytes, 1593 .maxlen = sizeof(sysctl_user_reserve_kbytes), 1594 .mode = 0644, 1595 .proc_handler = proc_doulongvec_minmax, 1596 }, 1597 { 1598 .procname = "admin_reserve_kbytes", 1599 .data = &sysctl_admin_reserve_kbytes, 1600 .maxlen = sizeof(sysctl_admin_reserve_kbytes), 1601 .mode = 0644, 1602 .proc_handler = proc_doulongvec_minmax, 1603 }, 1604 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS 1605 { 1606 .procname = "mmap_rnd_bits", 1607 .data = &mmap_rnd_bits, 1608 .maxlen = sizeof(mmap_rnd_bits), 1609 .mode = 0600, 1610 .proc_handler = proc_dointvec_minmax, 1611 .extra1 = (void *)&mmap_rnd_bits_min, 1612 .extra2 = (void *)&mmap_rnd_bits_max, 1613 }, 1614 #endif 1615 #ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS 1616 { 1617 .procname = "mmap_rnd_compat_bits", 1618 .data = &mmap_rnd_compat_bits, 1619 .maxlen = sizeof(mmap_rnd_compat_bits), 1620 .mode = 0600, 1621 .proc_handler = proc_dointvec_minmax, 1622 .extra1 = (void *)&mmap_rnd_compat_bits_min, 1623 .extra2 = (void *)&mmap_rnd_compat_bits_max, 1624 }, 1625 #endif 1626 { } 1627 }; 1628 1629 static struct ctl_table fs_table[] = { 1630 { 1631 .procname = "inode-nr", 1632 .data = &inodes_stat, 1633 .maxlen = 2*sizeof(long), 1634 .mode = 0444, 1635 .proc_handler = proc_nr_inodes, 1636 }, 1637 { 1638 .procname = "inode-state", 1639 .data = &inodes_stat, 1640 .maxlen = 7*sizeof(long), 1641 .mode = 0444, 1642 .proc_handler = proc_nr_inodes, 1643 }, 1644 { 1645 .procname = "file-nr", 1646 .data = &files_stat, 1647 .maxlen = sizeof(files_stat), 1648 .mode = 0444, 1649 .proc_handler = proc_nr_files, 1650 }, 1651 { 1652 .procname = "file-max", 1653 .data = &files_stat.max_files, 1654 .maxlen = sizeof(files_stat.max_files), 1655 .mode = 0644, 1656 .proc_handler = proc_doulongvec_minmax, 1657 }, 1658 { 1659 .procname = "nr_open", 1660 .data = &sysctl_nr_open, 1661 .maxlen = sizeof(int), 1662 .mode = 0644, 1663 .proc_handler = proc_dointvec_minmax, 1664 .extra1 = &sysctl_nr_open_min, 1665 .extra2 = &sysctl_nr_open_max, 1666 }, 1667 { 1668 .procname = "dentry-state", 1669 .data = &dentry_stat, 1670 .maxlen = 6*sizeof(long), 1671 .mode = 0444, 1672 .proc_handler = proc_nr_dentry, 1673 }, 1674 { 1675 .procname = "overflowuid", 1676 .data = &fs_overflowuid, 1677 .maxlen = sizeof(int), 1678 .mode = 0644, 1679 .proc_handler = proc_dointvec_minmax, 1680 .extra1 = &minolduid, 1681 .extra2 = &maxolduid, 1682 }, 1683 { 1684 .procname = "overflowgid", 1685 .data = &fs_overflowgid, 1686 .maxlen = sizeof(int), 1687 .mode = 0644, 1688 .proc_handler = proc_dointvec_minmax, 1689 .extra1 = &minolduid, 1690 .extra2 = &maxolduid, 1691 }, 1692 #ifdef CONFIG_FILE_LOCKING 1693 { 1694 .procname = "leases-enable", 1695 .data = &leases_enable, 1696 .maxlen = sizeof(int), 1697 .mode = 0644, 1698 .proc_handler = proc_dointvec, 1699 }, 1700 #endif 1701 #ifdef CONFIG_DNOTIFY 1702 { 1703 .procname = "dir-notify-enable", 1704 .data = &dir_notify_enable, 1705 .maxlen = sizeof(int), 1706 .mode = 0644, 1707 .proc_handler = proc_dointvec, 1708 }, 1709 #endif 1710 #ifdef CONFIG_MMU 1711 #ifdef CONFIG_FILE_LOCKING 1712 { 1713 .procname = "lease-break-time", 1714 .data = &lease_break_time, 1715 .maxlen = sizeof(int), 1716 .mode = 0644, 1717 .proc_handler = proc_dointvec, 1718 }, 1719 #endif 1720 #ifdef CONFIG_AIO 1721 { 1722 .procname = "aio-nr", 1723 .data = &aio_nr, 1724 .maxlen = sizeof(aio_nr), 1725 .mode = 0444, 1726 .proc_handler = proc_doulongvec_minmax, 1727 }, 1728 { 1729 .procname = "aio-max-nr", 1730 .data = &aio_max_nr, 1731 .maxlen = sizeof(aio_max_nr), 1732 .mode = 0644, 1733 .proc_handler = proc_doulongvec_minmax, 1734 }, 1735 #endif /* CONFIG_AIO */ 1736 #ifdef CONFIG_INOTIFY_USER 1737 { 1738 .procname = "inotify", 1739 .mode = 0555, 1740 .child = inotify_table, 1741 }, 1742 #endif 1743 #ifdef CONFIG_EPOLL 1744 { 1745 .procname = "epoll", 1746 .mode = 0555, 1747 .child = epoll_table, 1748 }, 1749 #endif 1750 #endif 1751 { 1752 .procname = "protected_symlinks", 1753 .data = &sysctl_protected_symlinks, 1754 .maxlen = sizeof(int), 1755 .mode = 0600, 1756 .proc_handler = proc_dointvec_minmax, 1757 .extra1 = &zero, 1758 .extra2 = &one, 1759 }, 1760 { 1761 .procname = "protected_hardlinks", 1762 .data = &sysctl_protected_hardlinks, 1763 .maxlen = sizeof(int), 1764 .mode = 0600, 1765 .proc_handler = proc_dointvec_minmax, 1766 .extra1 = &zero, 1767 .extra2 = &one, 1768 }, 1769 { 1770 .procname = "suid_dumpable", 1771 .data = &suid_dumpable, 1772 .maxlen = sizeof(int), 1773 .mode = 0644, 1774 .proc_handler = proc_dointvec_minmax_coredump, 1775 .extra1 = &zero, 1776 .extra2 = &two, 1777 }, 1778 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) 1779 { 1780 .procname = "binfmt_misc", 1781 .mode = 0555, 1782 .child = sysctl_mount_point, 1783 }, 1784 #endif 1785 { 1786 .procname = "pipe-max-size", 1787 .data = &pipe_max_size, 1788 .maxlen = sizeof(int), 1789 .mode = 0644, 1790 .proc_handler = &pipe_proc_fn, 1791 .extra1 = &pipe_min_size, 1792 }, 1793 { 1794 .procname = "pipe-user-pages-hard", 1795 .data = &pipe_user_pages_hard, 1796 .maxlen = sizeof(pipe_user_pages_hard), 1797 .mode = 0644, 1798 .proc_handler = proc_doulongvec_minmax, 1799 }, 1800 { 1801 .procname = "pipe-user-pages-soft", 1802 .data = &pipe_user_pages_soft, 1803 .maxlen = sizeof(pipe_user_pages_soft), 1804 .mode = 0644, 1805 .proc_handler = proc_doulongvec_minmax, 1806 }, 1807 { } 1808 }; 1809 1810 static struct ctl_table debug_table[] = { 1811 #ifdef CONFIG_SYSCTL_EXCEPTION_TRACE 1812 { 1813 .procname = "exception-trace", 1814 .data = &show_unhandled_signals, 1815 .maxlen = sizeof(int), 1816 .mode = 0644, 1817 .proc_handler = proc_dointvec 1818 }, 1819 #endif 1820 #if defined(CONFIG_OPTPROBES) 1821 { 1822 .procname = "kprobes-optimization", 1823 .data = &sysctl_kprobes_optimization, 1824 .maxlen = sizeof(int), 1825 .mode = 0644, 1826 .proc_handler = proc_kprobes_optimization_handler, 1827 .extra1 = &zero, 1828 .extra2 = &one, 1829 }, 1830 #endif 1831 { } 1832 }; 1833 1834 static struct ctl_table dev_table[] = { 1835 { } 1836 }; 1837 1838 int __init sysctl_init(void) 1839 { 1840 struct ctl_table_header *hdr; 1841 1842 hdr = register_sysctl_table(sysctl_base_table); 1843 kmemleak_not_leak(hdr); 1844 return 0; 1845 } 1846 1847 #endif /* CONFIG_SYSCTL */ 1848 1849 /* 1850 * /proc/sys support 1851 */ 1852 1853 #ifdef CONFIG_PROC_SYSCTL 1854 1855 static int _proc_do_string(char *data, int maxlen, int write, 1856 char __user *buffer, 1857 size_t *lenp, loff_t *ppos) 1858 { 1859 size_t len; 1860 char __user *p; 1861 char c; 1862 1863 if (!data || !maxlen || !*lenp) { 1864 *lenp = 0; 1865 return 0; 1866 } 1867 1868 if (write) { 1869 if (sysctl_writes_strict == SYSCTL_WRITES_STRICT) { 1870 /* Only continue writes not past the end of buffer. */ 1871 len = strlen(data); 1872 if (len > maxlen - 1) 1873 len = maxlen - 1; 1874 1875 if (*ppos > len) 1876 return 0; 1877 len = *ppos; 1878 } else { 1879 /* Start writing from beginning of buffer. */ 1880 len = 0; 1881 } 1882 1883 *ppos += *lenp; 1884 p = buffer; 1885 while ((p - buffer) < *lenp && len < maxlen - 1) { 1886 if (get_user(c, p++)) 1887 return -EFAULT; 1888 if (c == 0 || c == '\n') 1889 break; 1890 data[len++] = c; 1891 } 1892 data[len] = 0; 1893 } else { 1894 len = strlen(data); 1895 if (len > maxlen) 1896 len = maxlen; 1897 1898 if (*ppos > len) { 1899 *lenp = 0; 1900 return 0; 1901 } 1902 1903 data += *ppos; 1904 len -= *ppos; 1905 1906 if (len > *lenp) 1907 len = *lenp; 1908 if (len) 1909 if (copy_to_user(buffer, data, len)) 1910 return -EFAULT; 1911 if (len < *lenp) { 1912 if (put_user('\n', buffer + len)) 1913 return -EFAULT; 1914 len++; 1915 } 1916 *lenp = len; 1917 *ppos += len; 1918 } 1919 return 0; 1920 } 1921 1922 static void warn_sysctl_write(struct ctl_table *table) 1923 { 1924 pr_warn_once("%s wrote to %s when file position was not 0!\n" 1925 "This will not be supported in the future. To silence this\n" 1926 "warning, set kernel.sysctl_writes_strict = -1\n", 1927 current->comm, table->procname); 1928 } 1929 1930 /** 1931 * proc_dostring - read a string sysctl 1932 * @table: the sysctl table 1933 * @write: %TRUE if this is a write to the sysctl file 1934 * @buffer: the user buffer 1935 * @lenp: the size of the user buffer 1936 * @ppos: file position 1937 * 1938 * Reads/writes a string from/to the user buffer. If the kernel 1939 * buffer provided is not large enough to hold the string, the 1940 * string is truncated. The copied string is %NULL-terminated. 1941 * If the string is being read by the user process, it is copied 1942 * and a newline '\n' is added. It is truncated if the buffer is 1943 * not large enough. 1944 * 1945 * Returns 0 on success. 1946 */ 1947 int proc_dostring(struct ctl_table *table, int write, 1948 void __user *buffer, size_t *lenp, loff_t *ppos) 1949 { 1950 if (write && *ppos && sysctl_writes_strict == SYSCTL_WRITES_WARN) 1951 warn_sysctl_write(table); 1952 1953 return _proc_do_string((char *)(table->data), table->maxlen, write, 1954 (char __user *)buffer, lenp, ppos); 1955 } 1956 1957 static size_t proc_skip_spaces(char **buf) 1958 { 1959 size_t ret; 1960 char *tmp = skip_spaces(*buf); 1961 ret = tmp - *buf; 1962 *buf = tmp; 1963 return ret; 1964 } 1965 1966 static void proc_skip_char(char **buf, size_t *size, const char v) 1967 { 1968 while (*size) { 1969 if (**buf != v) 1970 break; 1971 (*size)--; 1972 (*buf)++; 1973 } 1974 } 1975 1976 #define TMPBUFLEN 22 1977 /** 1978 * proc_get_long - reads an ASCII formatted integer from a user buffer 1979 * 1980 * @buf: a kernel buffer 1981 * @size: size of the kernel buffer 1982 * @val: this is where the number will be stored 1983 * @neg: set to %TRUE if number is negative 1984 * @perm_tr: a vector which contains the allowed trailers 1985 * @perm_tr_len: size of the perm_tr vector 1986 * @tr: pointer to store the trailer character 1987 * 1988 * In case of success %0 is returned and @buf and @size are updated with 1989 * the amount of bytes read. If @tr is non-NULL and a trailing 1990 * character exists (size is non-zero after returning from this 1991 * function), @tr is updated with the trailing character. 1992 */ 1993 static int proc_get_long(char **buf, size_t *size, 1994 unsigned long *val, bool *neg, 1995 const char *perm_tr, unsigned perm_tr_len, char *tr) 1996 { 1997 int len; 1998 char *p, tmp[TMPBUFLEN]; 1999 2000 if (!*size) 2001 return -EINVAL; 2002 2003 len = *size; 2004 if (len > TMPBUFLEN - 1) 2005 len = TMPBUFLEN - 1; 2006 2007 memcpy(tmp, *buf, len); 2008 2009 tmp[len] = 0; 2010 p = tmp; 2011 if (*p == '-' && *size > 1) { 2012 *neg = true; 2013 p++; 2014 } else 2015 *neg = false; 2016 if (!isdigit(*p)) 2017 return -EINVAL; 2018 2019 *val = simple_strtoul(p, &p, 0); 2020 2021 len = p - tmp; 2022 2023 /* We don't know if the next char is whitespace thus we may accept 2024 * invalid integers (e.g. 1234...a) or two integers instead of one 2025 * (e.g. 123...1). So lets not allow such large numbers. */ 2026 if (len == TMPBUFLEN - 1) 2027 return -EINVAL; 2028 2029 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) 2030 return -EINVAL; 2031 2032 if (tr && (len < *size)) 2033 *tr = *p; 2034 2035 *buf += len; 2036 *size -= len; 2037 2038 return 0; 2039 } 2040 2041 /** 2042 * proc_put_long - converts an integer to a decimal ASCII formatted string 2043 * 2044 * @buf: the user buffer 2045 * @size: the size of the user buffer 2046 * @val: the integer to be converted 2047 * @neg: sign of the number, %TRUE for negative 2048 * 2049 * In case of success %0 is returned and @buf and @size are updated with 2050 * the amount of bytes written. 2051 */ 2052 static int proc_put_long(void __user **buf, size_t *size, unsigned long val, 2053 bool neg) 2054 { 2055 int len; 2056 char tmp[TMPBUFLEN], *p = tmp; 2057 2058 sprintf(p, "%s%lu", neg ? "-" : "", val); 2059 len = strlen(tmp); 2060 if (len > *size) 2061 len = *size; 2062 if (copy_to_user(*buf, tmp, len)) 2063 return -EFAULT; 2064 *size -= len; 2065 *buf += len; 2066 return 0; 2067 } 2068 #undef TMPBUFLEN 2069 2070 static int proc_put_char(void __user **buf, size_t *size, char c) 2071 { 2072 if (*size) { 2073 char __user **buffer = (char __user **)buf; 2074 if (put_user(c, *buffer)) 2075 return -EFAULT; 2076 (*size)--, (*buffer)++; 2077 *buf = *buffer; 2078 } 2079 return 0; 2080 } 2081 2082 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, 2083 int *valp, 2084 int write, void *data) 2085 { 2086 if (write) { 2087 if (*negp) { 2088 if (*lvalp > (unsigned long) INT_MAX + 1) 2089 return -EINVAL; 2090 *valp = -*lvalp; 2091 } else { 2092 if (*lvalp > (unsigned long) INT_MAX) 2093 return -EINVAL; 2094 *valp = *lvalp; 2095 } 2096 } else { 2097 int val = *valp; 2098 if (val < 0) { 2099 *negp = true; 2100 *lvalp = -(unsigned long)val; 2101 } else { 2102 *negp = false; 2103 *lvalp = (unsigned long)val; 2104 } 2105 } 2106 return 0; 2107 } 2108 2109 static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; 2110 2111 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, 2112 int write, void __user *buffer, 2113 size_t *lenp, loff_t *ppos, 2114 int (*conv)(bool *negp, unsigned long *lvalp, int *valp, 2115 int write, void *data), 2116 void *data) 2117 { 2118 int *i, vleft, first = 1, err = 0; 2119 size_t left; 2120 char *kbuf = NULL, *p; 2121 2122 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { 2123 *lenp = 0; 2124 return 0; 2125 } 2126 2127 i = (int *) tbl_data; 2128 vleft = table->maxlen / sizeof(*i); 2129 left = *lenp; 2130 2131 if (!conv) 2132 conv = do_proc_dointvec_conv; 2133 2134 if (write) { 2135 if (*ppos) { 2136 switch (sysctl_writes_strict) { 2137 case SYSCTL_WRITES_STRICT: 2138 goto out; 2139 case SYSCTL_WRITES_WARN: 2140 warn_sysctl_write(table); 2141 break; 2142 default: 2143 break; 2144 } 2145 } 2146 2147 if (left > PAGE_SIZE - 1) 2148 left = PAGE_SIZE - 1; 2149 p = kbuf = memdup_user_nul(buffer, left); 2150 if (IS_ERR(kbuf)) 2151 return PTR_ERR(kbuf); 2152 } 2153 2154 for (; left && vleft--; i++, first=0) { 2155 unsigned long lval; 2156 bool neg; 2157 2158 if (write) { 2159 left -= proc_skip_spaces(&p); 2160 2161 if (!left) 2162 break; 2163 err = proc_get_long(&p, &left, &lval, &neg, 2164 proc_wspace_sep, 2165 sizeof(proc_wspace_sep), NULL); 2166 if (err) 2167 break; 2168 if (conv(&neg, &lval, i, 1, data)) { 2169 err = -EINVAL; 2170 break; 2171 } 2172 } else { 2173 if (conv(&neg, &lval, i, 0, data)) { 2174 err = -EINVAL; 2175 break; 2176 } 2177 if (!first) 2178 err = proc_put_char(&buffer, &left, '\t'); 2179 if (err) 2180 break; 2181 err = proc_put_long(&buffer, &left, lval, neg); 2182 if (err) 2183 break; 2184 } 2185 } 2186 2187 if (!write && !first && left && !err) 2188 err = proc_put_char(&buffer, &left, '\n'); 2189 if (write && !err && left) 2190 left -= proc_skip_spaces(&p); 2191 if (write) { 2192 kfree(kbuf); 2193 if (first) 2194 return err ? : -EINVAL; 2195 } 2196 *lenp -= left; 2197 out: 2198 *ppos += *lenp; 2199 return err; 2200 } 2201 2202 static int do_proc_dointvec(struct ctl_table *table, int write, 2203 void __user *buffer, size_t *lenp, loff_t *ppos, 2204 int (*conv)(bool *negp, unsigned long *lvalp, int *valp, 2205 int write, void *data), 2206 void *data) 2207 { 2208 return __do_proc_dointvec(table->data, table, write, 2209 buffer, lenp, ppos, conv, data); 2210 } 2211 2212 /** 2213 * proc_dointvec - read a vector of integers 2214 * @table: the sysctl table 2215 * @write: %TRUE if this is a write to the sysctl file 2216 * @buffer: the user buffer 2217 * @lenp: the size of the user buffer 2218 * @ppos: file position 2219 * 2220 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2221 * values from/to the user buffer, treated as an ASCII string. 2222 * 2223 * Returns 0 on success. 2224 */ 2225 int proc_dointvec(struct ctl_table *table, int write, 2226 void __user *buffer, size_t *lenp, loff_t *ppos) 2227 { 2228 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2229 NULL,NULL); 2230 } 2231 2232 /* 2233 * Taint values can only be increased 2234 * This means we can safely use a temporary. 2235 */ 2236 static int proc_taint(struct ctl_table *table, int write, 2237 void __user *buffer, size_t *lenp, loff_t *ppos) 2238 { 2239 struct ctl_table t; 2240 unsigned long tmptaint = get_taint(); 2241 int err; 2242 2243 if (write && !capable(CAP_SYS_ADMIN)) 2244 return -EPERM; 2245 2246 t = *table; 2247 t.data = &tmptaint; 2248 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); 2249 if (err < 0) 2250 return err; 2251 2252 if (write) { 2253 /* 2254 * Poor man's atomic or. Not worth adding a primitive 2255 * to everyone's atomic.h for this 2256 */ 2257 int i; 2258 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { 2259 if ((tmptaint >> i) & 1) 2260 add_taint(i, LOCKDEP_STILL_OK); 2261 } 2262 } 2263 2264 return err; 2265 } 2266 2267 #ifdef CONFIG_PRINTK 2268 static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write, 2269 void __user *buffer, size_t *lenp, loff_t *ppos) 2270 { 2271 if (write && !capable(CAP_SYS_ADMIN)) 2272 return -EPERM; 2273 2274 return proc_dointvec_minmax(table, write, buffer, lenp, ppos); 2275 } 2276 #endif 2277 2278 struct do_proc_dointvec_minmax_conv_param { 2279 int *min; 2280 int *max; 2281 }; 2282 2283 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, 2284 int *valp, 2285 int write, void *data) 2286 { 2287 struct do_proc_dointvec_minmax_conv_param *param = data; 2288 if (write) { 2289 int val = *negp ? -*lvalp : *lvalp; 2290 if ((param->min && *param->min > val) || 2291 (param->max && *param->max < val)) 2292 return -EINVAL; 2293 *valp = val; 2294 } else { 2295 int val = *valp; 2296 if (val < 0) { 2297 *negp = true; 2298 *lvalp = -(unsigned long)val; 2299 } else { 2300 *negp = false; 2301 *lvalp = (unsigned long)val; 2302 } 2303 } 2304 return 0; 2305 } 2306 2307 /** 2308 * proc_dointvec_minmax - read a vector of integers with min/max values 2309 * @table: the sysctl table 2310 * @write: %TRUE if this is a write to the sysctl file 2311 * @buffer: the user buffer 2312 * @lenp: the size of the user buffer 2313 * @ppos: file position 2314 * 2315 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2316 * values from/to the user buffer, treated as an ASCII string. 2317 * 2318 * This routine will ensure the values are within the range specified by 2319 * table->extra1 (min) and table->extra2 (max). 2320 * 2321 * Returns 0 on success. 2322 */ 2323 int proc_dointvec_minmax(struct ctl_table *table, int write, 2324 void __user *buffer, size_t *lenp, loff_t *ppos) 2325 { 2326 struct do_proc_dointvec_minmax_conv_param param = { 2327 .min = (int *) table->extra1, 2328 .max = (int *) table->extra2, 2329 }; 2330 return do_proc_dointvec(table, write, buffer, lenp, ppos, 2331 do_proc_dointvec_minmax_conv, ¶m); 2332 } 2333 2334 static void validate_coredump_safety(void) 2335 { 2336 #ifdef CONFIG_COREDUMP 2337 if (suid_dumpable == SUID_DUMP_ROOT && 2338 core_pattern[0] != '/' && core_pattern[0] != '|') { 2339 printk(KERN_WARNING "Unsafe core_pattern used with "\ 2340 "suid_dumpable=2. Pipe handler or fully qualified "\ 2341 "core dump path required.\n"); 2342 } 2343 #endif 2344 } 2345 2346 static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write, 2347 void __user *buffer, size_t *lenp, loff_t *ppos) 2348 { 2349 int error = proc_dointvec_minmax(table, write, buffer, lenp, ppos); 2350 if (!error) 2351 validate_coredump_safety(); 2352 return error; 2353 } 2354 2355 #ifdef CONFIG_COREDUMP 2356 static int proc_dostring_coredump(struct ctl_table *table, int write, 2357 void __user *buffer, size_t *lenp, loff_t *ppos) 2358 { 2359 int error = proc_dostring(table, write, buffer, lenp, ppos); 2360 if (!error) 2361 validate_coredump_safety(); 2362 return error; 2363 } 2364 #endif 2365 2366 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, 2367 void __user *buffer, 2368 size_t *lenp, loff_t *ppos, 2369 unsigned long convmul, 2370 unsigned long convdiv) 2371 { 2372 unsigned long *i, *min, *max; 2373 int vleft, first = 1, err = 0; 2374 size_t left; 2375 char *kbuf = NULL, *p; 2376 2377 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { 2378 *lenp = 0; 2379 return 0; 2380 } 2381 2382 i = (unsigned long *) data; 2383 min = (unsigned long *) table->extra1; 2384 max = (unsigned long *) table->extra2; 2385 vleft = table->maxlen / sizeof(unsigned long); 2386 left = *lenp; 2387 2388 if (write) { 2389 if (*ppos) { 2390 switch (sysctl_writes_strict) { 2391 case SYSCTL_WRITES_STRICT: 2392 goto out; 2393 case SYSCTL_WRITES_WARN: 2394 warn_sysctl_write(table); 2395 break; 2396 default: 2397 break; 2398 } 2399 } 2400 2401 if (left > PAGE_SIZE - 1) 2402 left = PAGE_SIZE - 1; 2403 p = kbuf = memdup_user_nul(buffer, left); 2404 if (IS_ERR(kbuf)) 2405 return PTR_ERR(kbuf); 2406 } 2407 2408 for (; left && vleft--; i++, first = 0) { 2409 unsigned long val; 2410 2411 if (write) { 2412 bool neg; 2413 2414 left -= proc_skip_spaces(&p); 2415 2416 err = proc_get_long(&p, &left, &val, &neg, 2417 proc_wspace_sep, 2418 sizeof(proc_wspace_sep), NULL); 2419 if (err) 2420 break; 2421 if (neg) 2422 continue; 2423 if ((min && val < *min) || (max && val > *max)) 2424 continue; 2425 *i = val; 2426 } else { 2427 val = convdiv * (*i) / convmul; 2428 if (!first) { 2429 err = proc_put_char(&buffer, &left, '\t'); 2430 if (err) 2431 break; 2432 } 2433 err = proc_put_long(&buffer, &left, val, false); 2434 if (err) 2435 break; 2436 } 2437 } 2438 2439 if (!write && !first && left && !err) 2440 err = proc_put_char(&buffer, &left, '\n'); 2441 if (write && !err) 2442 left -= proc_skip_spaces(&p); 2443 if (write) { 2444 kfree(kbuf); 2445 if (first) 2446 return err ? : -EINVAL; 2447 } 2448 *lenp -= left; 2449 out: 2450 *ppos += *lenp; 2451 return err; 2452 } 2453 2454 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, 2455 void __user *buffer, 2456 size_t *lenp, loff_t *ppos, 2457 unsigned long convmul, 2458 unsigned long convdiv) 2459 { 2460 return __do_proc_doulongvec_minmax(table->data, table, write, 2461 buffer, lenp, ppos, convmul, convdiv); 2462 } 2463 2464 /** 2465 * proc_doulongvec_minmax - read a vector of long integers with min/max values 2466 * @table: the sysctl table 2467 * @write: %TRUE if this is a write to the sysctl file 2468 * @buffer: the user buffer 2469 * @lenp: the size of the user buffer 2470 * @ppos: file position 2471 * 2472 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long 2473 * values from/to the user buffer, treated as an ASCII string. 2474 * 2475 * This routine will ensure the values are within the range specified by 2476 * table->extra1 (min) and table->extra2 (max). 2477 * 2478 * Returns 0 on success. 2479 */ 2480 int proc_doulongvec_minmax(struct ctl_table *table, int write, 2481 void __user *buffer, size_t *lenp, loff_t *ppos) 2482 { 2483 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); 2484 } 2485 2486 /** 2487 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values 2488 * @table: the sysctl table 2489 * @write: %TRUE if this is a write to the sysctl file 2490 * @buffer: the user buffer 2491 * @lenp: the size of the user buffer 2492 * @ppos: file position 2493 * 2494 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long 2495 * values from/to the user buffer, treated as an ASCII string. The values 2496 * are treated as milliseconds, and converted to jiffies when they are stored. 2497 * 2498 * This routine will ensure the values are within the range specified by 2499 * table->extra1 (min) and table->extra2 (max). 2500 * 2501 * Returns 0 on success. 2502 */ 2503 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, 2504 void __user *buffer, 2505 size_t *lenp, loff_t *ppos) 2506 { 2507 return do_proc_doulongvec_minmax(table, write, buffer, 2508 lenp, ppos, HZ, 1000l); 2509 } 2510 2511 2512 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, 2513 int *valp, 2514 int write, void *data) 2515 { 2516 if (write) { 2517 if (*lvalp > LONG_MAX / HZ) 2518 return 1; 2519 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); 2520 } else { 2521 int val = *valp; 2522 unsigned long lval; 2523 if (val < 0) { 2524 *negp = true; 2525 lval = -(unsigned long)val; 2526 } else { 2527 *negp = false; 2528 lval = (unsigned long)val; 2529 } 2530 *lvalp = lval / HZ; 2531 } 2532 return 0; 2533 } 2534 2535 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, 2536 int *valp, 2537 int write, void *data) 2538 { 2539 if (write) { 2540 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) 2541 return 1; 2542 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); 2543 } else { 2544 int val = *valp; 2545 unsigned long lval; 2546 if (val < 0) { 2547 *negp = true; 2548 lval = -(unsigned long)val; 2549 } else { 2550 *negp = false; 2551 lval = (unsigned long)val; 2552 } 2553 *lvalp = jiffies_to_clock_t(lval); 2554 } 2555 return 0; 2556 } 2557 2558 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, 2559 int *valp, 2560 int write, void *data) 2561 { 2562 if (write) { 2563 unsigned long jif = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); 2564 2565 if (jif > INT_MAX) 2566 return 1; 2567 *valp = (int)jif; 2568 } else { 2569 int val = *valp; 2570 unsigned long lval; 2571 if (val < 0) { 2572 *negp = true; 2573 lval = -(unsigned long)val; 2574 } else { 2575 *negp = false; 2576 lval = (unsigned long)val; 2577 } 2578 *lvalp = jiffies_to_msecs(lval); 2579 } 2580 return 0; 2581 } 2582 2583 /** 2584 * proc_dointvec_jiffies - read a vector of integers as seconds 2585 * @table: the sysctl table 2586 * @write: %TRUE if this is a write to the sysctl file 2587 * @buffer: the user buffer 2588 * @lenp: the size of the user buffer 2589 * @ppos: file position 2590 * 2591 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2592 * values from/to the user buffer, treated as an ASCII string. 2593 * The values read are assumed to be in seconds, and are converted into 2594 * jiffies. 2595 * 2596 * Returns 0 on success. 2597 */ 2598 int proc_dointvec_jiffies(struct ctl_table *table, int write, 2599 void __user *buffer, size_t *lenp, loff_t *ppos) 2600 { 2601 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2602 do_proc_dointvec_jiffies_conv,NULL); 2603 } 2604 2605 /** 2606 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds 2607 * @table: the sysctl table 2608 * @write: %TRUE if this is a write to the sysctl file 2609 * @buffer: the user buffer 2610 * @lenp: the size of the user buffer 2611 * @ppos: pointer to the file position 2612 * 2613 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2614 * values from/to the user buffer, treated as an ASCII string. 2615 * The values read are assumed to be in 1/USER_HZ seconds, and 2616 * are converted into jiffies. 2617 * 2618 * Returns 0 on success. 2619 */ 2620 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, 2621 void __user *buffer, size_t *lenp, loff_t *ppos) 2622 { 2623 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2624 do_proc_dointvec_userhz_jiffies_conv,NULL); 2625 } 2626 2627 /** 2628 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds 2629 * @table: the sysctl table 2630 * @write: %TRUE if this is a write to the sysctl file 2631 * @buffer: the user buffer 2632 * @lenp: the size of the user buffer 2633 * @ppos: file position 2634 * @ppos: the current position in the file 2635 * 2636 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2637 * values from/to the user buffer, treated as an ASCII string. 2638 * The values read are assumed to be in 1/1000 seconds, and 2639 * are converted into jiffies. 2640 * 2641 * Returns 0 on success. 2642 */ 2643 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, 2644 void __user *buffer, size_t *lenp, loff_t *ppos) 2645 { 2646 return do_proc_dointvec(table, write, buffer, lenp, ppos, 2647 do_proc_dointvec_ms_jiffies_conv, NULL); 2648 } 2649 2650 static int proc_do_cad_pid(struct ctl_table *table, int write, 2651 void __user *buffer, size_t *lenp, loff_t *ppos) 2652 { 2653 struct pid *new_pid; 2654 pid_t tmp; 2655 int r; 2656 2657 tmp = pid_vnr(cad_pid); 2658 2659 r = __do_proc_dointvec(&tmp, table, write, buffer, 2660 lenp, ppos, NULL, NULL); 2661 if (r || !write) 2662 return r; 2663 2664 new_pid = find_get_pid(tmp); 2665 if (!new_pid) 2666 return -ESRCH; 2667 2668 put_pid(xchg(&cad_pid, new_pid)); 2669 return 0; 2670 } 2671 2672 /** 2673 * proc_do_large_bitmap - read/write from/to a large bitmap 2674 * @table: the sysctl table 2675 * @write: %TRUE if this is a write to the sysctl file 2676 * @buffer: the user buffer 2677 * @lenp: the size of the user buffer 2678 * @ppos: file position 2679 * 2680 * The bitmap is stored at table->data and the bitmap length (in bits) 2681 * in table->maxlen. 2682 * 2683 * We use a range comma separated format (e.g. 1,3-4,10-10) so that 2684 * large bitmaps may be represented in a compact manner. Writing into 2685 * the file will clear the bitmap then update it with the given input. 2686 * 2687 * Returns 0 on success. 2688 */ 2689 int proc_do_large_bitmap(struct ctl_table *table, int write, 2690 void __user *buffer, size_t *lenp, loff_t *ppos) 2691 { 2692 int err = 0; 2693 bool first = 1; 2694 size_t left = *lenp; 2695 unsigned long bitmap_len = table->maxlen; 2696 unsigned long *bitmap = *(unsigned long **) table->data; 2697 unsigned long *tmp_bitmap = NULL; 2698 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; 2699 2700 if (!bitmap || !bitmap_len || !left || (*ppos && !write)) { 2701 *lenp = 0; 2702 return 0; 2703 } 2704 2705 if (write) { 2706 char *kbuf, *p; 2707 2708 if (left > PAGE_SIZE - 1) 2709 left = PAGE_SIZE - 1; 2710 2711 p = kbuf = memdup_user_nul(buffer, left); 2712 if (IS_ERR(kbuf)) 2713 return PTR_ERR(kbuf); 2714 2715 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), 2716 GFP_KERNEL); 2717 if (!tmp_bitmap) { 2718 kfree(kbuf); 2719 return -ENOMEM; 2720 } 2721 proc_skip_char(&p, &left, '\n'); 2722 while (!err && left) { 2723 unsigned long val_a, val_b; 2724 bool neg; 2725 2726 err = proc_get_long(&p, &left, &val_a, &neg, tr_a, 2727 sizeof(tr_a), &c); 2728 if (err) 2729 break; 2730 if (val_a >= bitmap_len || neg) { 2731 err = -EINVAL; 2732 break; 2733 } 2734 2735 val_b = val_a; 2736 if (left) { 2737 p++; 2738 left--; 2739 } 2740 2741 if (c == '-') { 2742 err = proc_get_long(&p, &left, &val_b, 2743 &neg, tr_b, sizeof(tr_b), 2744 &c); 2745 if (err) 2746 break; 2747 if (val_b >= bitmap_len || neg || 2748 val_a > val_b) { 2749 err = -EINVAL; 2750 break; 2751 } 2752 if (left) { 2753 p++; 2754 left--; 2755 } 2756 } 2757 2758 bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1); 2759 first = 0; 2760 proc_skip_char(&p, &left, '\n'); 2761 } 2762 kfree(kbuf); 2763 } else { 2764 unsigned long bit_a, bit_b = 0; 2765 2766 while (left) { 2767 bit_a = find_next_bit(bitmap, bitmap_len, bit_b); 2768 if (bit_a >= bitmap_len) 2769 break; 2770 bit_b = find_next_zero_bit(bitmap, bitmap_len, 2771 bit_a + 1) - 1; 2772 2773 if (!first) { 2774 err = proc_put_char(&buffer, &left, ','); 2775 if (err) 2776 break; 2777 } 2778 err = proc_put_long(&buffer, &left, bit_a, false); 2779 if (err) 2780 break; 2781 if (bit_a != bit_b) { 2782 err = proc_put_char(&buffer, &left, '-'); 2783 if (err) 2784 break; 2785 err = proc_put_long(&buffer, &left, bit_b, false); 2786 if (err) 2787 break; 2788 } 2789 2790 first = 0; bit_b++; 2791 } 2792 if (!err) 2793 err = proc_put_char(&buffer, &left, '\n'); 2794 } 2795 2796 if (!err) { 2797 if (write) { 2798 if (*ppos) 2799 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); 2800 else 2801 bitmap_copy(bitmap, tmp_bitmap, bitmap_len); 2802 } 2803 kfree(tmp_bitmap); 2804 *lenp -= left; 2805 *ppos += *lenp; 2806 return 0; 2807 } else { 2808 kfree(tmp_bitmap); 2809 return err; 2810 } 2811 } 2812 2813 #else /* CONFIG_PROC_SYSCTL */ 2814 2815 int proc_dostring(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(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_minmax(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_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_dointvec_userhz_jiffies(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_dointvec_ms_jiffies(struct ctl_table *table, int write, 2846 void __user *buffer, size_t *lenp, loff_t *ppos) 2847 { 2848 return -ENOSYS; 2849 } 2850 2851 int proc_doulongvec_minmax(struct ctl_table *table, int write, 2852 void __user *buffer, size_t *lenp, loff_t *ppos) 2853 { 2854 return -ENOSYS; 2855 } 2856 2857 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, 2858 void __user *buffer, 2859 size_t *lenp, loff_t *ppos) 2860 { 2861 return -ENOSYS; 2862 } 2863 2864 2865 #endif /* CONFIG_PROC_SYSCTL */ 2866 2867 /* 2868 * No sense putting this after each symbol definition, twice, 2869 * exception granted :-) 2870 */ 2871 EXPORT_SYMBOL(proc_dointvec); 2872 EXPORT_SYMBOL(proc_dointvec_jiffies); 2873 EXPORT_SYMBOL(proc_dointvec_minmax); 2874 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); 2875 EXPORT_SYMBOL(proc_dointvec_ms_jiffies); 2876 EXPORT_SYMBOL(proc_dostring); 2877 EXPORT_SYMBOL(proc_doulongvec_minmax); 2878 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); 2879