1 /* 2 * sysctl.c: General linux system control interface 3 * 4 * Begun 24 March 1995, Stephen Tweedie 5 * Added /proc support, Dec 1995 6 * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas. 7 * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver. 8 * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver. 9 * Dynamic registration fixes, Stephen Tweedie. 10 * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn. 11 * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris 12 * Horn. 13 * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer. 14 * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer. 15 * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill 16 * Wendling. 17 * The list_for_each() macro wasn't appropriate for the sysctl loop. 18 * Removed it and replaced it with older style, 03/23/00, Bill Wendling 19 */ 20 21 #include <linux/module.h> 22 #include <linux/mm.h> 23 #include <linux/swap.h> 24 #include <linux/slab.h> 25 #include <linux/sysctl.h> 26 #include <linux/signal.h> 27 #include <linux/proc_fs.h> 28 #include <linux/security.h> 29 #include <linux/ctype.h> 30 #include <linux/kmemcheck.h> 31 #include <linux/fs.h> 32 #include <linux/init.h> 33 #include <linux/kernel.h> 34 #include <linux/kobject.h> 35 #include <linux/net.h> 36 #include <linux/sysrq.h> 37 #include <linux/highuid.h> 38 #include <linux/writeback.h> 39 #include <linux/ratelimit.h> 40 #include <linux/compaction.h> 41 #include <linux/hugetlb.h> 42 #include <linux/initrd.h> 43 #include <linux/key.h> 44 #include <linux/times.h> 45 #include <linux/limits.h> 46 #include <linux/dcache.h> 47 #include <linux/dnotify.h> 48 #include <linux/syscalls.h> 49 #include <linux/vmstat.h> 50 #include <linux/nfs_fs.h> 51 #include <linux/acpi.h> 52 #include <linux/reboot.h> 53 #include <linux/ftrace.h> 54 #include <linux/perf_event.h> 55 #include <linux/kprobes.h> 56 #include <linux/pipe_fs_i.h> 57 #include <linux/oom.h> 58 59 #include <asm/uaccess.h> 60 #include <asm/processor.h> 61 62 #ifdef CONFIG_X86 63 #include <asm/nmi.h> 64 #include <asm/stacktrace.h> 65 #include <asm/io.h> 66 #endif 67 #ifdef CONFIG_BSD_PROCESS_ACCT 68 #include <linux/acct.h> 69 #endif 70 #ifdef CONFIG_RT_MUTEXES 71 #include <linux/rtmutex.h> 72 #endif 73 #if defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_LOCK_STAT) 74 #include <linux/lockdep.h> 75 #endif 76 #ifdef CONFIG_CHR_DEV_SG 77 #include <scsi/sg.h> 78 #endif 79 80 #ifdef CONFIG_LOCKUP_DETECTOR 81 #include <linux/nmi.h> 82 #endif 83 84 85 #if defined(CONFIG_SYSCTL) 86 87 /* External variables not in a header file. */ 88 extern int sysctl_overcommit_memory; 89 extern int sysctl_overcommit_ratio; 90 extern int max_threads; 91 extern int core_uses_pid; 92 extern int suid_dumpable; 93 extern char core_pattern[]; 94 extern unsigned int core_pipe_limit; 95 extern int pid_max; 96 extern int min_free_kbytes; 97 extern int pid_max_min, pid_max_max; 98 extern int sysctl_drop_caches; 99 extern int percpu_pagelist_fraction; 100 extern int compat_log; 101 extern int latencytop_enabled; 102 extern int sysctl_nr_open_min, sysctl_nr_open_max; 103 #ifndef CONFIG_MMU 104 extern int sysctl_nr_trim_pages; 105 #endif 106 #ifdef CONFIG_BLOCK 107 extern int blk_iopoll_enabled; 108 #endif 109 110 /* Constants used for minimum and maximum */ 111 #ifdef CONFIG_LOCKUP_DETECTOR 112 static int sixty = 60; 113 static int neg_one = -1; 114 #endif 115 116 static int zero; 117 static int __maybe_unused one = 1; 118 static int __maybe_unused two = 2; 119 static unsigned long one_ul = 1; 120 static int one_hundred = 100; 121 #ifdef CONFIG_PRINTK 122 static int ten_thousand = 10000; 123 #endif 124 125 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */ 126 static unsigned long dirty_bytes_min = 2 * PAGE_SIZE; 127 128 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ 129 static int maxolduid = 65535; 130 static int minolduid; 131 static int min_percpu_pagelist_fract = 8; 132 133 static int ngroups_max = NGROUPS_MAX; 134 135 #ifdef CONFIG_INOTIFY_USER 136 #include <linux/inotify.h> 137 #endif 138 #ifdef CONFIG_SPARC 139 #include <asm/system.h> 140 #endif 141 142 #ifdef CONFIG_SPARC64 143 extern int sysctl_tsb_ratio; 144 #endif 145 146 #ifdef __hppa__ 147 extern int pwrsw_enabled; 148 extern int unaligned_enabled; 149 #endif 150 151 #ifdef CONFIG_S390 152 #ifdef CONFIG_MATHEMU 153 extern int sysctl_ieee_emulation_warnings; 154 #endif 155 extern int sysctl_userprocess_debug; 156 extern int spin_retry; 157 #endif 158 159 #ifdef CONFIG_IA64 160 extern int no_unaligned_warning; 161 extern int unaligned_dump_stack; 162 #endif 163 164 extern struct ratelimit_state printk_ratelimit_state; 165 166 #ifdef CONFIG_PROC_SYSCTL 167 static int proc_do_cad_pid(struct ctl_table *table, int write, 168 void __user *buffer, size_t *lenp, loff_t *ppos); 169 static int proc_taint(struct ctl_table *table, int write, 170 void __user *buffer, size_t *lenp, loff_t *ppos); 171 #endif 172 173 #ifdef CONFIG_MAGIC_SYSRQ 174 static int __sysrq_enabled; /* Note: sysrq code ises it's own private copy */ 175 176 static int sysrq_sysctl_handler(ctl_table *table, int write, 177 void __user *buffer, size_t *lenp, 178 loff_t *ppos) 179 { 180 int error; 181 182 error = proc_dointvec(table, write, buffer, lenp, ppos); 183 if (error) 184 return error; 185 186 if (write) 187 sysrq_toggle_support(__sysrq_enabled); 188 189 return 0; 190 } 191 192 #endif 193 194 static struct ctl_table root_table[]; 195 static struct ctl_table_root sysctl_table_root; 196 static struct ctl_table_header root_table_header = { 197 .count = 1, 198 .ctl_table = root_table, 199 .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list), 200 .root = &sysctl_table_root, 201 .set = &sysctl_table_root.default_set, 202 }; 203 static struct ctl_table_root sysctl_table_root = { 204 .root_list = LIST_HEAD_INIT(sysctl_table_root.root_list), 205 .default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry), 206 }; 207 208 static struct ctl_table kern_table[]; 209 static struct ctl_table vm_table[]; 210 static struct ctl_table fs_table[]; 211 static struct ctl_table debug_table[]; 212 static struct ctl_table dev_table[]; 213 extern struct ctl_table random_table[]; 214 #ifdef CONFIG_EPOLL 215 extern struct ctl_table epoll_table[]; 216 #endif 217 218 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT 219 int sysctl_legacy_va_layout; 220 #endif 221 222 /* The default sysctl tables: */ 223 224 static struct ctl_table root_table[] = { 225 { 226 .procname = "kernel", 227 .mode = 0555, 228 .child = kern_table, 229 }, 230 { 231 .procname = "vm", 232 .mode = 0555, 233 .child = vm_table, 234 }, 235 { 236 .procname = "fs", 237 .mode = 0555, 238 .child = fs_table, 239 }, 240 { 241 .procname = "debug", 242 .mode = 0555, 243 .child = debug_table, 244 }, 245 { 246 .procname = "dev", 247 .mode = 0555, 248 .child = dev_table, 249 }, 250 /* 251 * NOTE: do not add new entries to this table unless you have read 252 * Documentation/sysctl/ctl_unnumbered.txt 253 */ 254 { } 255 }; 256 257 #ifdef CONFIG_SCHED_DEBUG 258 static int min_sched_granularity_ns = 100000; /* 100 usecs */ 259 static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */ 260 static int min_wakeup_granularity_ns; /* 0 usecs */ 261 static int max_wakeup_granularity_ns = NSEC_PER_SEC; /* 1 second */ 262 static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE; 263 static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1; 264 static int min_sched_shares_ratelimit = 100000; /* 100 usec */ 265 static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */ 266 #endif 267 268 #ifdef CONFIG_COMPACTION 269 static int min_extfrag_threshold; 270 static int max_extfrag_threshold = 1000; 271 #endif 272 273 static struct ctl_table kern_table[] = { 274 { 275 .procname = "sched_child_runs_first", 276 .data = &sysctl_sched_child_runs_first, 277 .maxlen = sizeof(unsigned int), 278 .mode = 0644, 279 .proc_handler = proc_dointvec, 280 }, 281 #ifdef CONFIG_SCHED_DEBUG 282 { 283 .procname = "sched_min_granularity_ns", 284 .data = &sysctl_sched_min_granularity, 285 .maxlen = sizeof(unsigned int), 286 .mode = 0644, 287 .proc_handler = sched_proc_update_handler, 288 .extra1 = &min_sched_granularity_ns, 289 .extra2 = &max_sched_granularity_ns, 290 }, 291 { 292 .procname = "sched_latency_ns", 293 .data = &sysctl_sched_latency, 294 .maxlen = sizeof(unsigned int), 295 .mode = 0644, 296 .proc_handler = sched_proc_update_handler, 297 .extra1 = &min_sched_granularity_ns, 298 .extra2 = &max_sched_granularity_ns, 299 }, 300 { 301 .procname = "sched_wakeup_granularity_ns", 302 .data = &sysctl_sched_wakeup_granularity, 303 .maxlen = sizeof(unsigned int), 304 .mode = 0644, 305 .proc_handler = sched_proc_update_handler, 306 .extra1 = &min_wakeup_granularity_ns, 307 .extra2 = &max_wakeup_granularity_ns, 308 }, 309 { 310 .procname = "sched_shares_ratelimit", 311 .data = &sysctl_sched_shares_ratelimit, 312 .maxlen = sizeof(unsigned int), 313 .mode = 0644, 314 .proc_handler = sched_proc_update_handler, 315 .extra1 = &min_sched_shares_ratelimit, 316 .extra2 = &max_sched_shares_ratelimit, 317 }, 318 { 319 .procname = "sched_tunable_scaling", 320 .data = &sysctl_sched_tunable_scaling, 321 .maxlen = sizeof(enum sched_tunable_scaling), 322 .mode = 0644, 323 .proc_handler = sched_proc_update_handler, 324 .extra1 = &min_sched_tunable_scaling, 325 .extra2 = &max_sched_tunable_scaling, 326 }, 327 { 328 .procname = "sched_shares_thresh", 329 .data = &sysctl_sched_shares_thresh, 330 .maxlen = sizeof(unsigned int), 331 .mode = 0644, 332 .proc_handler = proc_dointvec_minmax, 333 .extra1 = &zero, 334 }, 335 { 336 .procname = "sched_migration_cost", 337 .data = &sysctl_sched_migration_cost, 338 .maxlen = sizeof(unsigned int), 339 .mode = 0644, 340 .proc_handler = proc_dointvec, 341 }, 342 { 343 .procname = "sched_nr_migrate", 344 .data = &sysctl_sched_nr_migrate, 345 .maxlen = sizeof(unsigned int), 346 .mode = 0644, 347 .proc_handler = proc_dointvec, 348 }, 349 { 350 .procname = "sched_time_avg", 351 .data = &sysctl_sched_time_avg, 352 .maxlen = sizeof(unsigned int), 353 .mode = 0644, 354 .proc_handler = proc_dointvec, 355 }, 356 { 357 .procname = "timer_migration", 358 .data = &sysctl_timer_migration, 359 .maxlen = sizeof(unsigned int), 360 .mode = 0644, 361 .proc_handler = proc_dointvec_minmax, 362 .extra1 = &zero, 363 .extra2 = &one, 364 }, 365 #endif 366 { 367 .procname = "sched_rt_period_us", 368 .data = &sysctl_sched_rt_period, 369 .maxlen = sizeof(unsigned int), 370 .mode = 0644, 371 .proc_handler = sched_rt_handler, 372 }, 373 { 374 .procname = "sched_rt_runtime_us", 375 .data = &sysctl_sched_rt_runtime, 376 .maxlen = sizeof(int), 377 .mode = 0644, 378 .proc_handler = sched_rt_handler, 379 }, 380 { 381 .procname = "sched_compat_yield", 382 .data = &sysctl_sched_compat_yield, 383 .maxlen = sizeof(unsigned int), 384 .mode = 0644, 385 .proc_handler = proc_dointvec, 386 }, 387 #ifdef CONFIG_PROVE_LOCKING 388 { 389 .procname = "prove_locking", 390 .data = &prove_locking, 391 .maxlen = sizeof(int), 392 .mode = 0644, 393 .proc_handler = proc_dointvec, 394 }, 395 #endif 396 #ifdef CONFIG_LOCK_STAT 397 { 398 .procname = "lock_stat", 399 .data = &lock_stat, 400 .maxlen = sizeof(int), 401 .mode = 0644, 402 .proc_handler = proc_dointvec, 403 }, 404 #endif 405 { 406 .procname = "panic", 407 .data = &panic_timeout, 408 .maxlen = sizeof(int), 409 .mode = 0644, 410 .proc_handler = proc_dointvec, 411 }, 412 { 413 .procname = "core_uses_pid", 414 .data = &core_uses_pid, 415 .maxlen = sizeof(int), 416 .mode = 0644, 417 .proc_handler = proc_dointvec, 418 }, 419 { 420 .procname = "core_pattern", 421 .data = core_pattern, 422 .maxlen = CORENAME_MAX_SIZE, 423 .mode = 0644, 424 .proc_handler = proc_dostring, 425 }, 426 { 427 .procname = "core_pipe_limit", 428 .data = &core_pipe_limit, 429 .maxlen = sizeof(unsigned int), 430 .mode = 0644, 431 .proc_handler = proc_dointvec, 432 }, 433 #ifdef CONFIG_PROC_SYSCTL 434 { 435 .procname = "tainted", 436 .maxlen = sizeof(long), 437 .mode = 0644, 438 .proc_handler = proc_taint, 439 }, 440 #endif 441 #ifdef CONFIG_LATENCYTOP 442 { 443 .procname = "latencytop", 444 .data = &latencytop_enabled, 445 .maxlen = sizeof(int), 446 .mode = 0644, 447 .proc_handler = proc_dointvec, 448 }, 449 #endif 450 #ifdef CONFIG_BLK_DEV_INITRD 451 { 452 .procname = "real-root-dev", 453 .data = &real_root_dev, 454 .maxlen = sizeof(int), 455 .mode = 0644, 456 .proc_handler = proc_dointvec, 457 }, 458 #endif 459 { 460 .procname = "print-fatal-signals", 461 .data = &print_fatal_signals, 462 .maxlen = sizeof(int), 463 .mode = 0644, 464 .proc_handler = proc_dointvec, 465 }, 466 #ifdef CONFIG_SPARC 467 { 468 .procname = "reboot-cmd", 469 .data = reboot_command, 470 .maxlen = 256, 471 .mode = 0644, 472 .proc_handler = proc_dostring, 473 }, 474 { 475 .procname = "stop-a", 476 .data = &stop_a_enabled, 477 .maxlen = sizeof (int), 478 .mode = 0644, 479 .proc_handler = proc_dointvec, 480 }, 481 { 482 .procname = "scons-poweroff", 483 .data = &scons_pwroff, 484 .maxlen = sizeof (int), 485 .mode = 0644, 486 .proc_handler = proc_dointvec, 487 }, 488 #endif 489 #ifdef CONFIG_SPARC64 490 { 491 .procname = "tsb-ratio", 492 .data = &sysctl_tsb_ratio, 493 .maxlen = sizeof (int), 494 .mode = 0644, 495 .proc_handler = proc_dointvec, 496 }, 497 #endif 498 #ifdef __hppa__ 499 { 500 .procname = "soft-power", 501 .data = &pwrsw_enabled, 502 .maxlen = sizeof (int), 503 .mode = 0644, 504 .proc_handler = proc_dointvec, 505 }, 506 { 507 .procname = "unaligned-trap", 508 .data = &unaligned_enabled, 509 .maxlen = sizeof (int), 510 .mode = 0644, 511 .proc_handler = proc_dointvec, 512 }, 513 #endif 514 { 515 .procname = "ctrl-alt-del", 516 .data = &C_A_D, 517 .maxlen = sizeof(int), 518 .mode = 0644, 519 .proc_handler = proc_dointvec, 520 }, 521 #ifdef CONFIG_FUNCTION_TRACER 522 { 523 .procname = "ftrace_enabled", 524 .data = &ftrace_enabled, 525 .maxlen = sizeof(int), 526 .mode = 0644, 527 .proc_handler = ftrace_enable_sysctl, 528 }, 529 #endif 530 #ifdef CONFIG_STACK_TRACER 531 { 532 .procname = "stack_tracer_enabled", 533 .data = &stack_tracer_enabled, 534 .maxlen = sizeof(int), 535 .mode = 0644, 536 .proc_handler = stack_trace_sysctl, 537 }, 538 #endif 539 #ifdef CONFIG_TRACING 540 { 541 .procname = "ftrace_dump_on_oops", 542 .data = &ftrace_dump_on_oops, 543 .maxlen = sizeof(int), 544 .mode = 0644, 545 .proc_handler = proc_dointvec, 546 }, 547 #endif 548 #ifdef CONFIG_MODULES 549 { 550 .procname = "modprobe", 551 .data = &modprobe_path, 552 .maxlen = KMOD_PATH_LEN, 553 .mode = 0644, 554 .proc_handler = proc_dostring, 555 }, 556 { 557 .procname = "modules_disabled", 558 .data = &modules_disabled, 559 .maxlen = sizeof(int), 560 .mode = 0644, 561 /* only handle a transition from default "0" to "1" */ 562 .proc_handler = proc_dointvec_minmax, 563 .extra1 = &one, 564 .extra2 = &one, 565 }, 566 #endif 567 #ifdef CONFIG_HOTPLUG 568 { 569 .procname = "hotplug", 570 .data = &uevent_helper, 571 .maxlen = UEVENT_HELPER_PATH_LEN, 572 .mode = 0644, 573 .proc_handler = proc_dostring, 574 }, 575 #endif 576 #ifdef CONFIG_CHR_DEV_SG 577 { 578 .procname = "sg-big-buff", 579 .data = &sg_big_buff, 580 .maxlen = sizeof (int), 581 .mode = 0444, 582 .proc_handler = proc_dointvec, 583 }, 584 #endif 585 #ifdef CONFIG_BSD_PROCESS_ACCT 586 { 587 .procname = "acct", 588 .data = &acct_parm, 589 .maxlen = 3*sizeof(int), 590 .mode = 0644, 591 .proc_handler = proc_dointvec, 592 }, 593 #endif 594 #ifdef CONFIG_MAGIC_SYSRQ 595 { 596 .procname = "sysrq", 597 .data = &__sysrq_enabled, 598 .maxlen = sizeof (int), 599 .mode = 0644, 600 .proc_handler = sysrq_sysctl_handler, 601 }, 602 #endif 603 #ifdef CONFIG_PROC_SYSCTL 604 { 605 .procname = "cad_pid", 606 .data = NULL, 607 .maxlen = sizeof (int), 608 .mode = 0600, 609 .proc_handler = proc_do_cad_pid, 610 }, 611 #endif 612 { 613 .procname = "threads-max", 614 .data = &max_threads, 615 .maxlen = sizeof(int), 616 .mode = 0644, 617 .proc_handler = proc_dointvec, 618 }, 619 { 620 .procname = "random", 621 .mode = 0555, 622 .child = random_table, 623 }, 624 { 625 .procname = "overflowuid", 626 .data = &overflowuid, 627 .maxlen = sizeof(int), 628 .mode = 0644, 629 .proc_handler = proc_dointvec_minmax, 630 .extra1 = &minolduid, 631 .extra2 = &maxolduid, 632 }, 633 { 634 .procname = "overflowgid", 635 .data = &overflowgid, 636 .maxlen = sizeof(int), 637 .mode = 0644, 638 .proc_handler = proc_dointvec_minmax, 639 .extra1 = &minolduid, 640 .extra2 = &maxolduid, 641 }, 642 #ifdef CONFIG_S390 643 #ifdef CONFIG_MATHEMU 644 { 645 .procname = "ieee_emulation_warnings", 646 .data = &sysctl_ieee_emulation_warnings, 647 .maxlen = sizeof(int), 648 .mode = 0644, 649 .proc_handler = proc_dointvec, 650 }, 651 #endif 652 { 653 .procname = "userprocess_debug", 654 .data = &show_unhandled_signals, 655 .maxlen = sizeof(int), 656 .mode = 0644, 657 .proc_handler = proc_dointvec, 658 }, 659 #endif 660 { 661 .procname = "pid_max", 662 .data = &pid_max, 663 .maxlen = sizeof (int), 664 .mode = 0644, 665 .proc_handler = proc_dointvec_minmax, 666 .extra1 = &pid_max_min, 667 .extra2 = &pid_max_max, 668 }, 669 { 670 .procname = "panic_on_oops", 671 .data = &panic_on_oops, 672 .maxlen = sizeof(int), 673 .mode = 0644, 674 .proc_handler = proc_dointvec, 675 }, 676 #if defined CONFIG_PRINTK 677 { 678 .procname = "printk", 679 .data = &console_loglevel, 680 .maxlen = 4*sizeof(int), 681 .mode = 0644, 682 .proc_handler = proc_dointvec, 683 }, 684 { 685 .procname = "printk_ratelimit", 686 .data = &printk_ratelimit_state.interval, 687 .maxlen = sizeof(int), 688 .mode = 0644, 689 .proc_handler = proc_dointvec_jiffies, 690 }, 691 { 692 .procname = "printk_ratelimit_burst", 693 .data = &printk_ratelimit_state.burst, 694 .maxlen = sizeof(int), 695 .mode = 0644, 696 .proc_handler = proc_dointvec, 697 }, 698 { 699 .procname = "printk_delay", 700 .data = &printk_delay_msec, 701 .maxlen = sizeof(int), 702 .mode = 0644, 703 .proc_handler = proc_dointvec_minmax, 704 .extra1 = &zero, 705 .extra2 = &ten_thousand, 706 }, 707 #endif 708 { 709 .procname = "ngroups_max", 710 .data = &ngroups_max, 711 .maxlen = sizeof (int), 712 .mode = 0444, 713 .proc_handler = proc_dointvec, 714 }, 715 #if defined(CONFIG_LOCKUP_DETECTOR) 716 { 717 .procname = "watchdog", 718 .data = &watchdog_enabled, 719 .maxlen = sizeof (int), 720 .mode = 0644, 721 .proc_handler = proc_dowatchdog_enabled, 722 }, 723 { 724 .procname = "watchdog_thresh", 725 .data = &softlockup_thresh, 726 .maxlen = sizeof(int), 727 .mode = 0644, 728 .proc_handler = proc_dowatchdog_thresh, 729 .extra1 = &neg_one, 730 .extra2 = &sixty, 731 }, 732 { 733 .procname = "softlockup_panic", 734 .data = &softlockup_panic, 735 .maxlen = sizeof(int), 736 .mode = 0644, 737 .proc_handler = proc_dointvec_minmax, 738 .extra1 = &zero, 739 .extra2 = &one, 740 }, 741 #endif 742 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) && !defined(CONFIG_LOCKUP_DETECTOR) 743 { 744 .procname = "unknown_nmi_panic", 745 .data = &unknown_nmi_panic, 746 .maxlen = sizeof (int), 747 .mode = 0644, 748 .proc_handler = proc_dointvec, 749 }, 750 { 751 .procname = "nmi_watchdog", 752 .data = &nmi_watchdog_enabled, 753 .maxlen = sizeof (int), 754 .mode = 0644, 755 .proc_handler = proc_nmi_enabled, 756 }, 757 #endif 758 #if defined(CONFIG_X86) 759 { 760 .procname = "panic_on_unrecovered_nmi", 761 .data = &panic_on_unrecovered_nmi, 762 .maxlen = sizeof(int), 763 .mode = 0644, 764 .proc_handler = proc_dointvec, 765 }, 766 { 767 .procname = "panic_on_io_nmi", 768 .data = &panic_on_io_nmi, 769 .maxlen = sizeof(int), 770 .mode = 0644, 771 .proc_handler = proc_dointvec, 772 }, 773 { 774 .procname = "bootloader_type", 775 .data = &bootloader_type, 776 .maxlen = sizeof (int), 777 .mode = 0444, 778 .proc_handler = proc_dointvec, 779 }, 780 { 781 .procname = "bootloader_version", 782 .data = &bootloader_version, 783 .maxlen = sizeof (int), 784 .mode = 0444, 785 .proc_handler = proc_dointvec, 786 }, 787 { 788 .procname = "kstack_depth_to_print", 789 .data = &kstack_depth_to_print, 790 .maxlen = sizeof(int), 791 .mode = 0644, 792 .proc_handler = proc_dointvec, 793 }, 794 { 795 .procname = "io_delay_type", 796 .data = &io_delay_type, 797 .maxlen = sizeof(int), 798 .mode = 0644, 799 .proc_handler = proc_dointvec, 800 }, 801 #endif 802 #if defined(CONFIG_MMU) 803 { 804 .procname = "randomize_va_space", 805 .data = &randomize_va_space, 806 .maxlen = sizeof(int), 807 .mode = 0644, 808 .proc_handler = proc_dointvec, 809 }, 810 #endif 811 #if defined(CONFIG_S390) && defined(CONFIG_SMP) 812 { 813 .procname = "spin_retry", 814 .data = &spin_retry, 815 .maxlen = sizeof (int), 816 .mode = 0644, 817 .proc_handler = proc_dointvec, 818 }, 819 #endif 820 #if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86) 821 { 822 .procname = "acpi_video_flags", 823 .data = &acpi_realmode_flags, 824 .maxlen = sizeof (unsigned long), 825 .mode = 0644, 826 .proc_handler = proc_doulongvec_minmax, 827 }, 828 #endif 829 #ifdef CONFIG_IA64 830 { 831 .procname = "ignore-unaligned-usertrap", 832 .data = &no_unaligned_warning, 833 .maxlen = sizeof (int), 834 .mode = 0644, 835 .proc_handler = proc_dointvec, 836 }, 837 { 838 .procname = "unaligned-dump-stack", 839 .data = &unaligned_dump_stack, 840 .maxlen = sizeof (int), 841 .mode = 0644, 842 .proc_handler = proc_dointvec, 843 }, 844 #endif 845 #ifdef CONFIG_DETECT_HUNG_TASK 846 { 847 .procname = "hung_task_panic", 848 .data = &sysctl_hung_task_panic, 849 .maxlen = sizeof(int), 850 .mode = 0644, 851 .proc_handler = proc_dointvec_minmax, 852 .extra1 = &zero, 853 .extra2 = &one, 854 }, 855 { 856 .procname = "hung_task_check_count", 857 .data = &sysctl_hung_task_check_count, 858 .maxlen = sizeof(unsigned long), 859 .mode = 0644, 860 .proc_handler = proc_doulongvec_minmax, 861 }, 862 { 863 .procname = "hung_task_timeout_secs", 864 .data = &sysctl_hung_task_timeout_secs, 865 .maxlen = sizeof(unsigned long), 866 .mode = 0644, 867 .proc_handler = proc_dohung_task_timeout_secs, 868 }, 869 { 870 .procname = "hung_task_warnings", 871 .data = &sysctl_hung_task_warnings, 872 .maxlen = sizeof(unsigned long), 873 .mode = 0644, 874 .proc_handler = proc_doulongvec_minmax, 875 }, 876 #endif 877 #ifdef CONFIG_COMPAT 878 { 879 .procname = "compat-log", 880 .data = &compat_log, 881 .maxlen = sizeof (int), 882 .mode = 0644, 883 .proc_handler = proc_dointvec, 884 }, 885 #endif 886 #ifdef CONFIG_RT_MUTEXES 887 { 888 .procname = "max_lock_depth", 889 .data = &max_lock_depth, 890 .maxlen = sizeof(int), 891 .mode = 0644, 892 .proc_handler = proc_dointvec, 893 }, 894 #endif 895 { 896 .procname = "poweroff_cmd", 897 .data = &poweroff_cmd, 898 .maxlen = POWEROFF_CMD_PATH_LEN, 899 .mode = 0644, 900 .proc_handler = proc_dostring, 901 }, 902 #ifdef CONFIG_KEYS 903 { 904 .procname = "keys", 905 .mode = 0555, 906 .child = key_sysctls, 907 }, 908 #endif 909 #ifdef CONFIG_RCU_TORTURE_TEST 910 { 911 .procname = "rcutorture_runnable", 912 .data = &rcutorture_runnable, 913 .maxlen = sizeof(int), 914 .mode = 0644, 915 .proc_handler = proc_dointvec, 916 }, 917 #endif 918 #ifdef CONFIG_PERF_EVENTS 919 { 920 .procname = "perf_event_paranoid", 921 .data = &sysctl_perf_event_paranoid, 922 .maxlen = sizeof(sysctl_perf_event_paranoid), 923 .mode = 0644, 924 .proc_handler = proc_dointvec, 925 }, 926 { 927 .procname = "perf_event_mlock_kb", 928 .data = &sysctl_perf_event_mlock, 929 .maxlen = sizeof(sysctl_perf_event_mlock), 930 .mode = 0644, 931 .proc_handler = proc_dointvec, 932 }, 933 { 934 .procname = "perf_event_max_sample_rate", 935 .data = &sysctl_perf_event_sample_rate, 936 .maxlen = sizeof(sysctl_perf_event_sample_rate), 937 .mode = 0644, 938 .proc_handler = proc_dointvec, 939 }, 940 #endif 941 #ifdef CONFIG_KMEMCHECK 942 { 943 .procname = "kmemcheck", 944 .data = &kmemcheck_enabled, 945 .maxlen = sizeof(int), 946 .mode = 0644, 947 .proc_handler = proc_dointvec, 948 }, 949 #endif 950 #ifdef CONFIG_BLOCK 951 { 952 .procname = "blk_iopoll", 953 .data = &blk_iopoll_enabled, 954 .maxlen = sizeof(int), 955 .mode = 0644, 956 .proc_handler = proc_dointvec, 957 }, 958 #endif 959 /* 960 * NOTE: do not add new entries to this table unless you have read 961 * Documentation/sysctl/ctl_unnumbered.txt 962 */ 963 { } 964 }; 965 966 static struct ctl_table vm_table[] = { 967 { 968 .procname = "overcommit_memory", 969 .data = &sysctl_overcommit_memory, 970 .maxlen = sizeof(sysctl_overcommit_memory), 971 .mode = 0644, 972 .proc_handler = proc_dointvec, 973 }, 974 { 975 .procname = "panic_on_oom", 976 .data = &sysctl_panic_on_oom, 977 .maxlen = sizeof(sysctl_panic_on_oom), 978 .mode = 0644, 979 .proc_handler = proc_dointvec, 980 }, 981 { 982 .procname = "oom_kill_allocating_task", 983 .data = &sysctl_oom_kill_allocating_task, 984 .maxlen = sizeof(sysctl_oom_kill_allocating_task), 985 .mode = 0644, 986 .proc_handler = proc_dointvec, 987 }, 988 { 989 .procname = "oom_dump_tasks", 990 .data = &sysctl_oom_dump_tasks, 991 .maxlen = sizeof(sysctl_oom_dump_tasks), 992 .mode = 0644, 993 .proc_handler = proc_dointvec, 994 }, 995 { 996 .procname = "overcommit_ratio", 997 .data = &sysctl_overcommit_ratio, 998 .maxlen = sizeof(sysctl_overcommit_ratio), 999 .mode = 0644, 1000 .proc_handler = proc_dointvec, 1001 }, 1002 { 1003 .procname = "page-cluster", 1004 .data = &page_cluster, 1005 .maxlen = sizeof(int), 1006 .mode = 0644, 1007 .proc_handler = proc_dointvec, 1008 }, 1009 { 1010 .procname = "dirty_background_ratio", 1011 .data = &dirty_background_ratio, 1012 .maxlen = sizeof(dirty_background_ratio), 1013 .mode = 0644, 1014 .proc_handler = dirty_background_ratio_handler, 1015 .extra1 = &zero, 1016 .extra2 = &one_hundred, 1017 }, 1018 { 1019 .procname = "dirty_background_bytes", 1020 .data = &dirty_background_bytes, 1021 .maxlen = sizeof(dirty_background_bytes), 1022 .mode = 0644, 1023 .proc_handler = dirty_background_bytes_handler, 1024 .extra1 = &one_ul, 1025 }, 1026 { 1027 .procname = "dirty_ratio", 1028 .data = &vm_dirty_ratio, 1029 .maxlen = sizeof(vm_dirty_ratio), 1030 .mode = 0644, 1031 .proc_handler = dirty_ratio_handler, 1032 .extra1 = &zero, 1033 .extra2 = &one_hundred, 1034 }, 1035 { 1036 .procname = "dirty_bytes", 1037 .data = &vm_dirty_bytes, 1038 .maxlen = sizeof(vm_dirty_bytes), 1039 .mode = 0644, 1040 .proc_handler = dirty_bytes_handler, 1041 .extra1 = &dirty_bytes_min, 1042 }, 1043 { 1044 .procname = "dirty_writeback_centisecs", 1045 .data = &dirty_writeback_interval, 1046 .maxlen = sizeof(dirty_writeback_interval), 1047 .mode = 0644, 1048 .proc_handler = dirty_writeback_centisecs_handler, 1049 }, 1050 { 1051 .procname = "dirty_expire_centisecs", 1052 .data = &dirty_expire_interval, 1053 .maxlen = sizeof(dirty_expire_interval), 1054 .mode = 0644, 1055 .proc_handler = proc_dointvec, 1056 }, 1057 { 1058 .procname = "nr_pdflush_threads", 1059 .data = &nr_pdflush_threads, 1060 .maxlen = sizeof nr_pdflush_threads, 1061 .mode = 0444 /* read-only*/, 1062 .proc_handler = proc_dointvec, 1063 }, 1064 { 1065 .procname = "swappiness", 1066 .data = &vm_swappiness, 1067 .maxlen = sizeof(vm_swappiness), 1068 .mode = 0644, 1069 .proc_handler = proc_dointvec_minmax, 1070 .extra1 = &zero, 1071 .extra2 = &one_hundred, 1072 }, 1073 #ifdef CONFIG_HUGETLB_PAGE 1074 { 1075 .procname = "nr_hugepages", 1076 .data = NULL, 1077 .maxlen = sizeof(unsigned long), 1078 .mode = 0644, 1079 .proc_handler = hugetlb_sysctl_handler, 1080 .extra1 = (void *)&hugetlb_zero, 1081 .extra2 = (void *)&hugetlb_infinity, 1082 }, 1083 #ifdef CONFIG_NUMA 1084 { 1085 .procname = "nr_hugepages_mempolicy", 1086 .data = NULL, 1087 .maxlen = sizeof(unsigned long), 1088 .mode = 0644, 1089 .proc_handler = &hugetlb_mempolicy_sysctl_handler, 1090 .extra1 = (void *)&hugetlb_zero, 1091 .extra2 = (void *)&hugetlb_infinity, 1092 }, 1093 #endif 1094 { 1095 .procname = "hugetlb_shm_group", 1096 .data = &sysctl_hugetlb_shm_group, 1097 .maxlen = sizeof(gid_t), 1098 .mode = 0644, 1099 .proc_handler = proc_dointvec, 1100 }, 1101 { 1102 .procname = "hugepages_treat_as_movable", 1103 .data = &hugepages_treat_as_movable, 1104 .maxlen = sizeof(int), 1105 .mode = 0644, 1106 .proc_handler = hugetlb_treat_movable_handler, 1107 }, 1108 { 1109 .procname = "nr_overcommit_hugepages", 1110 .data = NULL, 1111 .maxlen = sizeof(unsigned long), 1112 .mode = 0644, 1113 .proc_handler = hugetlb_overcommit_handler, 1114 .extra1 = (void *)&hugetlb_zero, 1115 .extra2 = (void *)&hugetlb_infinity, 1116 }, 1117 #endif 1118 { 1119 .procname = "lowmem_reserve_ratio", 1120 .data = &sysctl_lowmem_reserve_ratio, 1121 .maxlen = sizeof(sysctl_lowmem_reserve_ratio), 1122 .mode = 0644, 1123 .proc_handler = lowmem_reserve_ratio_sysctl_handler, 1124 }, 1125 { 1126 .procname = "drop_caches", 1127 .data = &sysctl_drop_caches, 1128 .maxlen = sizeof(int), 1129 .mode = 0644, 1130 .proc_handler = drop_caches_sysctl_handler, 1131 }, 1132 #ifdef CONFIG_COMPACTION 1133 { 1134 .procname = "compact_memory", 1135 .data = &sysctl_compact_memory, 1136 .maxlen = sizeof(int), 1137 .mode = 0200, 1138 .proc_handler = sysctl_compaction_handler, 1139 }, 1140 { 1141 .procname = "extfrag_threshold", 1142 .data = &sysctl_extfrag_threshold, 1143 .maxlen = sizeof(int), 1144 .mode = 0644, 1145 .proc_handler = sysctl_extfrag_handler, 1146 .extra1 = &min_extfrag_threshold, 1147 .extra2 = &max_extfrag_threshold, 1148 }, 1149 1150 #endif /* CONFIG_COMPACTION */ 1151 { 1152 .procname = "min_free_kbytes", 1153 .data = &min_free_kbytes, 1154 .maxlen = sizeof(min_free_kbytes), 1155 .mode = 0644, 1156 .proc_handler = min_free_kbytes_sysctl_handler, 1157 .extra1 = &zero, 1158 }, 1159 { 1160 .procname = "percpu_pagelist_fraction", 1161 .data = &percpu_pagelist_fraction, 1162 .maxlen = sizeof(percpu_pagelist_fraction), 1163 .mode = 0644, 1164 .proc_handler = percpu_pagelist_fraction_sysctl_handler, 1165 .extra1 = &min_percpu_pagelist_fract, 1166 }, 1167 #ifdef CONFIG_MMU 1168 { 1169 .procname = "max_map_count", 1170 .data = &sysctl_max_map_count, 1171 .maxlen = sizeof(sysctl_max_map_count), 1172 .mode = 0644, 1173 .proc_handler = proc_dointvec_minmax, 1174 .extra1 = &zero, 1175 }, 1176 #else 1177 { 1178 .procname = "nr_trim_pages", 1179 .data = &sysctl_nr_trim_pages, 1180 .maxlen = sizeof(sysctl_nr_trim_pages), 1181 .mode = 0644, 1182 .proc_handler = proc_dointvec_minmax, 1183 .extra1 = &zero, 1184 }, 1185 #endif 1186 { 1187 .procname = "laptop_mode", 1188 .data = &laptop_mode, 1189 .maxlen = sizeof(laptop_mode), 1190 .mode = 0644, 1191 .proc_handler = proc_dointvec_jiffies, 1192 }, 1193 { 1194 .procname = "block_dump", 1195 .data = &block_dump, 1196 .maxlen = sizeof(block_dump), 1197 .mode = 0644, 1198 .proc_handler = proc_dointvec, 1199 .extra1 = &zero, 1200 }, 1201 { 1202 .procname = "vfs_cache_pressure", 1203 .data = &sysctl_vfs_cache_pressure, 1204 .maxlen = sizeof(sysctl_vfs_cache_pressure), 1205 .mode = 0644, 1206 .proc_handler = proc_dointvec, 1207 .extra1 = &zero, 1208 }, 1209 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT 1210 { 1211 .procname = "legacy_va_layout", 1212 .data = &sysctl_legacy_va_layout, 1213 .maxlen = sizeof(sysctl_legacy_va_layout), 1214 .mode = 0644, 1215 .proc_handler = proc_dointvec, 1216 .extra1 = &zero, 1217 }, 1218 #endif 1219 #ifdef CONFIG_NUMA 1220 { 1221 .procname = "zone_reclaim_mode", 1222 .data = &zone_reclaim_mode, 1223 .maxlen = sizeof(zone_reclaim_mode), 1224 .mode = 0644, 1225 .proc_handler = proc_dointvec, 1226 .extra1 = &zero, 1227 }, 1228 { 1229 .procname = "min_unmapped_ratio", 1230 .data = &sysctl_min_unmapped_ratio, 1231 .maxlen = sizeof(sysctl_min_unmapped_ratio), 1232 .mode = 0644, 1233 .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler, 1234 .extra1 = &zero, 1235 .extra2 = &one_hundred, 1236 }, 1237 { 1238 .procname = "min_slab_ratio", 1239 .data = &sysctl_min_slab_ratio, 1240 .maxlen = sizeof(sysctl_min_slab_ratio), 1241 .mode = 0644, 1242 .proc_handler = sysctl_min_slab_ratio_sysctl_handler, 1243 .extra1 = &zero, 1244 .extra2 = &one_hundred, 1245 }, 1246 #endif 1247 #ifdef CONFIG_SMP 1248 { 1249 .procname = "stat_interval", 1250 .data = &sysctl_stat_interval, 1251 .maxlen = sizeof(sysctl_stat_interval), 1252 .mode = 0644, 1253 .proc_handler = proc_dointvec_jiffies, 1254 }, 1255 #endif 1256 #ifdef CONFIG_MMU 1257 { 1258 .procname = "mmap_min_addr", 1259 .data = &dac_mmap_min_addr, 1260 .maxlen = sizeof(unsigned long), 1261 .mode = 0644, 1262 .proc_handler = mmap_min_addr_handler, 1263 }, 1264 #endif 1265 #ifdef CONFIG_NUMA 1266 { 1267 .procname = "numa_zonelist_order", 1268 .data = &numa_zonelist_order, 1269 .maxlen = NUMA_ZONELIST_ORDER_LEN, 1270 .mode = 0644, 1271 .proc_handler = numa_zonelist_order_handler, 1272 }, 1273 #endif 1274 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \ 1275 (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL)) 1276 { 1277 .procname = "vdso_enabled", 1278 .data = &vdso_enabled, 1279 .maxlen = sizeof(vdso_enabled), 1280 .mode = 0644, 1281 .proc_handler = proc_dointvec, 1282 .extra1 = &zero, 1283 }, 1284 #endif 1285 #ifdef CONFIG_HIGHMEM 1286 { 1287 .procname = "highmem_is_dirtyable", 1288 .data = &vm_highmem_is_dirtyable, 1289 .maxlen = sizeof(vm_highmem_is_dirtyable), 1290 .mode = 0644, 1291 .proc_handler = proc_dointvec_minmax, 1292 .extra1 = &zero, 1293 .extra2 = &one, 1294 }, 1295 #endif 1296 { 1297 .procname = "scan_unevictable_pages", 1298 .data = &scan_unevictable_pages, 1299 .maxlen = sizeof(scan_unevictable_pages), 1300 .mode = 0644, 1301 .proc_handler = scan_unevictable_handler, 1302 }, 1303 #ifdef CONFIG_MEMORY_FAILURE 1304 { 1305 .procname = "memory_failure_early_kill", 1306 .data = &sysctl_memory_failure_early_kill, 1307 .maxlen = sizeof(sysctl_memory_failure_early_kill), 1308 .mode = 0644, 1309 .proc_handler = proc_dointvec_minmax, 1310 .extra1 = &zero, 1311 .extra2 = &one, 1312 }, 1313 { 1314 .procname = "memory_failure_recovery", 1315 .data = &sysctl_memory_failure_recovery, 1316 .maxlen = sizeof(sysctl_memory_failure_recovery), 1317 .mode = 0644, 1318 .proc_handler = proc_dointvec_minmax, 1319 .extra1 = &zero, 1320 .extra2 = &one, 1321 }, 1322 #endif 1323 1324 /* 1325 * NOTE: do not add new entries to this table unless you have read 1326 * Documentation/sysctl/ctl_unnumbered.txt 1327 */ 1328 { } 1329 }; 1330 1331 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) 1332 static struct ctl_table binfmt_misc_table[] = { 1333 { } 1334 }; 1335 #endif 1336 1337 static struct ctl_table fs_table[] = { 1338 { 1339 .procname = "inode-nr", 1340 .data = &inodes_stat, 1341 .maxlen = 2*sizeof(int), 1342 .mode = 0444, 1343 .proc_handler = proc_dointvec, 1344 }, 1345 { 1346 .procname = "inode-state", 1347 .data = &inodes_stat, 1348 .maxlen = 7*sizeof(int), 1349 .mode = 0444, 1350 .proc_handler = proc_dointvec, 1351 }, 1352 { 1353 .procname = "file-nr", 1354 .data = &files_stat, 1355 .maxlen = 3*sizeof(int), 1356 .mode = 0444, 1357 .proc_handler = proc_nr_files, 1358 }, 1359 { 1360 .procname = "file-max", 1361 .data = &files_stat.max_files, 1362 .maxlen = sizeof(int), 1363 .mode = 0644, 1364 .proc_handler = proc_dointvec, 1365 }, 1366 { 1367 .procname = "nr_open", 1368 .data = &sysctl_nr_open, 1369 .maxlen = sizeof(int), 1370 .mode = 0644, 1371 .proc_handler = proc_dointvec_minmax, 1372 .extra1 = &sysctl_nr_open_min, 1373 .extra2 = &sysctl_nr_open_max, 1374 }, 1375 { 1376 .procname = "dentry-state", 1377 .data = &dentry_stat, 1378 .maxlen = 6*sizeof(int), 1379 .mode = 0444, 1380 .proc_handler = proc_dointvec, 1381 }, 1382 { 1383 .procname = "overflowuid", 1384 .data = &fs_overflowuid, 1385 .maxlen = sizeof(int), 1386 .mode = 0644, 1387 .proc_handler = proc_dointvec_minmax, 1388 .extra1 = &minolduid, 1389 .extra2 = &maxolduid, 1390 }, 1391 { 1392 .procname = "overflowgid", 1393 .data = &fs_overflowgid, 1394 .maxlen = sizeof(int), 1395 .mode = 0644, 1396 .proc_handler = proc_dointvec_minmax, 1397 .extra1 = &minolduid, 1398 .extra2 = &maxolduid, 1399 }, 1400 #ifdef CONFIG_FILE_LOCKING 1401 { 1402 .procname = "leases-enable", 1403 .data = &leases_enable, 1404 .maxlen = sizeof(int), 1405 .mode = 0644, 1406 .proc_handler = proc_dointvec, 1407 }, 1408 #endif 1409 #ifdef CONFIG_DNOTIFY 1410 { 1411 .procname = "dir-notify-enable", 1412 .data = &dir_notify_enable, 1413 .maxlen = sizeof(int), 1414 .mode = 0644, 1415 .proc_handler = proc_dointvec, 1416 }, 1417 #endif 1418 #ifdef CONFIG_MMU 1419 #ifdef CONFIG_FILE_LOCKING 1420 { 1421 .procname = "lease-break-time", 1422 .data = &lease_break_time, 1423 .maxlen = sizeof(int), 1424 .mode = 0644, 1425 .proc_handler = proc_dointvec, 1426 }, 1427 #endif 1428 #ifdef CONFIG_AIO 1429 { 1430 .procname = "aio-nr", 1431 .data = &aio_nr, 1432 .maxlen = sizeof(aio_nr), 1433 .mode = 0444, 1434 .proc_handler = proc_doulongvec_minmax, 1435 }, 1436 { 1437 .procname = "aio-max-nr", 1438 .data = &aio_max_nr, 1439 .maxlen = sizeof(aio_max_nr), 1440 .mode = 0644, 1441 .proc_handler = proc_doulongvec_minmax, 1442 }, 1443 #endif /* CONFIG_AIO */ 1444 #ifdef CONFIG_INOTIFY_USER 1445 { 1446 .procname = "inotify", 1447 .mode = 0555, 1448 .child = inotify_table, 1449 }, 1450 #endif 1451 #ifdef CONFIG_EPOLL 1452 { 1453 .procname = "epoll", 1454 .mode = 0555, 1455 .child = epoll_table, 1456 }, 1457 #endif 1458 #endif 1459 { 1460 .procname = "suid_dumpable", 1461 .data = &suid_dumpable, 1462 .maxlen = sizeof(int), 1463 .mode = 0644, 1464 .proc_handler = proc_dointvec_minmax, 1465 .extra1 = &zero, 1466 .extra2 = &two, 1467 }, 1468 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) 1469 { 1470 .procname = "binfmt_misc", 1471 .mode = 0555, 1472 .child = binfmt_misc_table, 1473 }, 1474 #endif 1475 { 1476 .procname = "pipe-max-size", 1477 .data = &pipe_max_size, 1478 .maxlen = sizeof(int), 1479 .mode = 0644, 1480 .proc_handler = &pipe_proc_fn, 1481 .extra1 = &pipe_min_size, 1482 }, 1483 /* 1484 * NOTE: do not add new entries to this table unless you have read 1485 * Documentation/sysctl/ctl_unnumbered.txt 1486 */ 1487 { } 1488 }; 1489 1490 static struct ctl_table debug_table[] = { 1491 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \ 1492 defined(CONFIG_S390) 1493 { 1494 .procname = "exception-trace", 1495 .data = &show_unhandled_signals, 1496 .maxlen = sizeof(int), 1497 .mode = 0644, 1498 .proc_handler = proc_dointvec 1499 }, 1500 #endif 1501 #if defined(CONFIG_OPTPROBES) 1502 { 1503 .procname = "kprobes-optimization", 1504 .data = &sysctl_kprobes_optimization, 1505 .maxlen = sizeof(int), 1506 .mode = 0644, 1507 .proc_handler = proc_kprobes_optimization_handler, 1508 .extra1 = &zero, 1509 .extra2 = &one, 1510 }, 1511 #endif 1512 { } 1513 }; 1514 1515 static struct ctl_table dev_table[] = { 1516 { } 1517 }; 1518 1519 static DEFINE_SPINLOCK(sysctl_lock); 1520 1521 /* called under sysctl_lock */ 1522 static int use_table(struct ctl_table_header *p) 1523 { 1524 if (unlikely(p->unregistering)) 1525 return 0; 1526 p->used++; 1527 return 1; 1528 } 1529 1530 /* called under sysctl_lock */ 1531 static void unuse_table(struct ctl_table_header *p) 1532 { 1533 if (!--p->used) 1534 if (unlikely(p->unregistering)) 1535 complete(p->unregistering); 1536 } 1537 1538 /* called under sysctl_lock, will reacquire if has to wait */ 1539 static void start_unregistering(struct ctl_table_header *p) 1540 { 1541 /* 1542 * if p->used is 0, nobody will ever touch that entry again; 1543 * we'll eliminate all paths to it before dropping sysctl_lock 1544 */ 1545 if (unlikely(p->used)) { 1546 struct completion wait; 1547 init_completion(&wait); 1548 p->unregistering = &wait; 1549 spin_unlock(&sysctl_lock); 1550 wait_for_completion(&wait); 1551 spin_lock(&sysctl_lock); 1552 } else { 1553 /* anything non-NULL; we'll never dereference it */ 1554 p->unregistering = ERR_PTR(-EINVAL); 1555 } 1556 /* 1557 * do not remove from the list until nobody holds it; walking the 1558 * list in do_sysctl() relies on that. 1559 */ 1560 list_del_init(&p->ctl_entry); 1561 } 1562 1563 void sysctl_head_get(struct ctl_table_header *head) 1564 { 1565 spin_lock(&sysctl_lock); 1566 head->count++; 1567 spin_unlock(&sysctl_lock); 1568 } 1569 1570 void sysctl_head_put(struct ctl_table_header *head) 1571 { 1572 spin_lock(&sysctl_lock); 1573 if (!--head->count) 1574 kfree(head); 1575 spin_unlock(&sysctl_lock); 1576 } 1577 1578 struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head) 1579 { 1580 if (!head) 1581 BUG(); 1582 spin_lock(&sysctl_lock); 1583 if (!use_table(head)) 1584 head = ERR_PTR(-ENOENT); 1585 spin_unlock(&sysctl_lock); 1586 return head; 1587 } 1588 1589 void sysctl_head_finish(struct ctl_table_header *head) 1590 { 1591 if (!head) 1592 return; 1593 spin_lock(&sysctl_lock); 1594 unuse_table(head); 1595 spin_unlock(&sysctl_lock); 1596 } 1597 1598 static struct ctl_table_set * 1599 lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces) 1600 { 1601 struct ctl_table_set *set = &root->default_set; 1602 if (root->lookup) 1603 set = root->lookup(root, namespaces); 1604 return set; 1605 } 1606 1607 static struct list_head * 1608 lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces) 1609 { 1610 struct ctl_table_set *set = lookup_header_set(root, namespaces); 1611 return &set->list; 1612 } 1613 1614 struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces, 1615 struct ctl_table_header *prev) 1616 { 1617 struct ctl_table_root *root; 1618 struct list_head *header_list; 1619 struct ctl_table_header *head; 1620 struct list_head *tmp; 1621 1622 spin_lock(&sysctl_lock); 1623 if (prev) { 1624 head = prev; 1625 tmp = &prev->ctl_entry; 1626 unuse_table(prev); 1627 goto next; 1628 } 1629 tmp = &root_table_header.ctl_entry; 1630 for (;;) { 1631 head = list_entry(tmp, struct ctl_table_header, ctl_entry); 1632 1633 if (!use_table(head)) 1634 goto next; 1635 spin_unlock(&sysctl_lock); 1636 return head; 1637 next: 1638 root = head->root; 1639 tmp = tmp->next; 1640 header_list = lookup_header_list(root, namespaces); 1641 if (tmp != header_list) 1642 continue; 1643 1644 do { 1645 root = list_entry(root->root_list.next, 1646 struct ctl_table_root, root_list); 1647 if (root == &sysctl_table_root) 1648 goto out; 1649 header_list = lookup_header_list(root, namespaces); 1650 } while (list_empty(header_list)); 1651 tmp = header_list->next; 1652 } 1653 out: 1654 spin_unlock(&sysctl_lock); 1655 return NULL; 1656 } 1657 1658 struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev) 1659 { 1660 return __sysctl_head_next(current->nsproxy, prev); 1661 } 1662 1663 void register_sysctl_root(struct ctl_table_root *root) 1664 { 1665 spin_lock(&sysctl_lock); 1666 list_add_tail(&root->root_list, &sysctl_table_root.root_list); 1667 spin_unlock(&sysctl_lock); 1668 } 1669 1670 /* 1671 * sysctl_perm does NOT grant the superuser all rights automatically, because 1672 * some sysctl variables are readonly even to root. 1673 */ 1674 1675 static int test_perm(int mode, int op) 1676 { 1677 if (!current_euid()) 1678 mode >>= 6; 1679 else if (in_egroup_p(0)) 1680 mode >>= 3; 1681 if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0) 1682 return 0; 1683 return -EACCES; 1684 } 1685 1686 int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op) 1687 { 1688 int error; 1689 int mode; 1690 1691 error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC)); 1692 if (error) 1693 return error; 1694 1695 if (root->permissions) 1696 mode = root->permissions(root, current->nsproxy, table); 1697 else 1698 mode = table->mode; 1699 1700 return test_perm(mode, op); 1701 } 1702 1703 static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table) 1704 { 1705 for (; table->procname; table++) { 1706 table->parent = parent; 1707 if (table->child) 1708 sysctl_set_parent(table, table->child); 1709 } 1710 } 1711 1712 static __init int sysctl_init(void) 1713 { 1714 sysctl_set_parent(NULL, root_table); 1715 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK 1716 sysctl_check_table(current->nsproxy, root_table); 1717 #endif 1718 return 0; 1719 } 1720 1721 core_initcall(sysctl_init); 1722 1723 static struct ctl_table *is_branch_in(struct ctl_table *branch, 1724 struct ctl_table *table) 1725 { 1726 struct ctl_table *p; 1727 const char *s = branch->procname; 1728 1729 /* branch should have named subdirectory as its first element */ 1730 if (!s || !branch->child) 1731 return NULL; 1732 1733 /* ... and nothing else */ 1734 if (branch[1].procname) 1735 return NULL; 1736 1737 /* table should contain subdirectory with the same name */ 1738 for (p = table; p->procname; p++) { 1739 if (!p->child) 1740 continue; 1741 if (p->procname && strcmp(p->procname, s) == 0) 1742 return p; 1743 } 1744 return NULL; 1745 } 1746 1747 /* see if attaching q to p would be an improvement */ 1748 static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) 1749 { 1750 struct ctl_table *to = p->ctl_table, *by = q->ctl_table; 1751 struct ctl_table *next; 1752 int is_better = 0; 1753 int not_in_parent = !p->attached_by; 1754 1755 while ((next = is_branch_in(by, to)) != NULL) { 1756 if (by == q->attached_by) 1757 is_better = 1; 1758 if (to == p->attached_by) 1759 not_in_parent = 1; 1760 by = by->child; 1761 to = next->child; 1762 } 1763 1764 if (is_better && not_in_parent) { 1765 q->attached_by = by; 1766 q->attached_to = to; 1767 q->parent = p; 1768 } 1769 } 1770 1771 /** 1772 * __register_sysctl_paths - register a sysctl hierarchy 1773 * @root: List of sysctl headers to register on 1774 * @namespaces: Data to compute which lists of sysctl entries are visible 1775 * @path: The path to the directory the sysctl table is in. 1776 * @table: the top-level table structure 1777 * 1778 * Register a sysctl table hierarchy. @table should be a filled in ctl_table 1779 * array. A completely 0 filled entry terminates the table. 1780 * 1781 * The members of the &struct ctl_table structure are used as follows: 1782 * 1783 * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not 1784 * enter a sysctl file 1785 * 1786 * data - a pointer to data for use by proc_handler 1787 * 1788 * maxlen - the maximum size in bytes of the data 1789 * 1790 * mode - the file permissions for the /proc/sys file, and for sysctl(2) 1791 * 1792 * child - a pointer to the child sysctl table if this entry is a directory, or 1793 * %NULL. 1794 * 1795 * proc_handler - the text handler routine (described below) 1796 * 1797 * de - for internal use by the sysctl routines 1798 * 1799 * extra1, extra2 - extra pointers usable by the proc handler routines 1800 * 1801 * Leaf nodes in the sysctl tree will be represented by a single file 1802 * under /proc; non-leaf nodes will be represented by directories. 1803 * 1804 * sysctl(2) can automatically manage read and write requests through 1805 * the sysctl table. The data and maxlen fields of the ctl_table 1806 * struct enable minimal validation of the values being written to be 1807 * performed, and the mode field allows minimal authentication. 1808 * 1809 * There must be a proc_handler routine for any terminal nodes 1810 * mirrored under /proc/sys (non-terminals are handled by a built-in 1811 * directory handler). Several default handlers are available to 1812 * cover common cases - 1813 * 1814 * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(), 1815 * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), 1816 * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax() 1817 * 1818 * It is the handler's job to read the input buffer from user memory 1819 * and process it. The handler should return 0 on success. 1820 * 1821 * This routine returns %NULL on a failure to register, and a pointer 1822 * to the table header on success. 1823 */ 1824 struct ctl_table_header *__register_sysctl_paths( 1825 struct ctl_table_root *root, 1826 struct nsproxy *namespaces, 1827 const struct ctl_path *path, struct ctl_table *table) 1828 { 1829 struct ctl_table_header *header; 1830 struct ctl_table *new, **prevp; 1831 unsigned int n, npath; 1832 struct ctl_table_set *set; 1833 1834 /* Count the path components */ 1835 for (npath = 0; path[npath].procname; ++npath) 1836 ; 1837 1838 /* 1839 * For each path component, allocate a 2-element ctl_table array. 1840 * The first array element will be filled with the sysctl entry 1841 * for this, the second will be the sentinel (procname == 0). 1842 * 1843 * We allocate everything in one go so that we don't have to 1844 * worry about freeing additional memory in unregister_sysctl_table. 1845 */ 1846 header = kzalloc(sizeof(struct ctl_table_header) + 1847 (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL); 1848 if (!header) 1849 return NULL; 1850 1851 new = (struct ctl_table *) (header + 1); 1852 1853 /* Now connect the dots */ 1854 prevp = &header->ctl_table; 1855 for (n = 0; n < npath; ++n, ++path) { 1856 /* Copy the procname */ 1857 new->procname = path->procname; 1858 new->mode = 0555; 1859 1860 *prevp = new; 1861 prevp = &new->child; 1862 1863 new += 2; 1864 } 1865 *prevp = table; 1866 header->ctl_table_arg = table; 1867 1868 INIT_LIST_HEAD(&header->ctl_entry); 1869 header->used = 0; 1870 header->unregistering = NULL; 1871 header->root = root; 1872 sysctl_set_parent(NULL, header->ctl_table); 1873 header->count = 1; 1874 #ifdef CONFIG_SYSCTL_SYSCALL_CHECK 1875 if (sysctl_check_table(namespaces, header->ctl_table)) { 1876 kfree(header); 1877 return NULL; 1878 } 1879 #endif 1880 spin_lock(&sysctl_lock); 1881 header->set = lookup_header_set(root, namespaces); 1882 header->attached_by = header->ctl_table; 1883 header->attached_to = root_table; 1884 header->parent = &root_table_header; 1885 for (set = header->set; set; set = set->parent) { 1886 struct ctl_table_header *p; 1887 list_for_each_entry(p, &set->list, ctl_entry) { 1888 if (p->unregistering) 1889 continue; 1890 try_attach(p, header); 1891 } 1892 } 1893 header->parent->count++; 1894 list_add_tail(&header->ctl_entry, &header->set->list); 1895 spin_unlock(&sysctl_lock); 1896 1897 return header; 1898 } 1899 1900 /** 1901 * register_sysctl_table_path - register a sysctl table hierarchy 1902 * @path: The path to the directory the sysctl table is in. 1903 * @table: the top-level table structure 1904 * 1905 * Register a sysctl table hierarchy. @table should be a filled in ctl_table 1906 * array. A completely 0 filled entry terminates the table. 1907 * 1908 * See __register_sysctl_paths for more details. 1909 */ 1910 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, 1911 struct ctl_table *table) 1912 { 1913 return __register_sysctl_paths(&sysctl_table_root, current->nsproxy, 1914 path, table); 1915 } 1916 1917 /** 1918 * register_sysctl_table - register a sysctl table hierarchy 1919 * @table: the top-level table structure 1920 * 1921 * Register a sysctl table hierarchy. @table should be a filled in ctl_table 1922 * array. A completely 0 filled entry terminates the table. 1923 * 1924 * See register_sysctl_paths for more details. 1925 */ 1926 struct ctl_table_header *register_sysctl_table(struct ctl_table *table) 1927 { 1928 static const struct ctl_path null_path[] = { {} }; 1929 1930 return register_sysctl_paths(null_path, table); 1931 } 1932 1933 /** 1934 * unregister_sysctl_table - unregister a sysctl table hierarchy 1935 * @header: the header returned from register_sysctl_table 1936 * 1937 * Unregisters the sysctl table and all children. proc entries may not 1938 * actually be removed until they are no longer used by anyone. 1939 */ 1940 void unregister_sysctl_table(struct ctl_table_header * header) 1941 { 1942 might_sleep(); 1943 1944 if (header == NULL) 1945 return; 1946 1947 spin_lock(&sysctl_lock); 1948 start_unregistering(header); 1949 if (!--header->parent->count) { 1950 WARN_ON(1); 1951 kfree(header->parent); 1952 } 1953 if (!--header->count) 1954 kfree(header); 1955 spin_unlock(&sysctl_lock); 1956 } 1957 1958 int sysctl_is_seen(struct ctl_table_header *p) 1959 { 1960 struct ctl_table_set *set = p->set; 1961 int res; 1962 spin_lock(&sysctl_lock); 1963 if (p->unregistering) 1964 res = 0; 1965 else if (!set->is_seen) 1966 res = 1; 1967 else 1968 res = set->is_seen(set); 1969 spin_unlock(&sysctl_lock); 1970 return res; 1971 } 1972 1973 void setup_sysctl_set(struct ctl_table_set *p, 1974 struct ctl_table_set *parent, 1975 int (*is_seen)(struct ctl_table_set *)) 1976 { 1977 INIT_LIST_HEAD(&p->list); 1978 p->parent = parent ? parent : &sysctl_table_root.default_set; 1979 p->is_seen = is_seen; 1980 } 1981 1982 #else /* !CONFIG_SYSCTL */ 1983 struct ctl_table_header *register_sysctl_table(struct ctl_table * table) 1984 { 1985 return NULL; 1986 } 1987 1988 struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path, 1989 struct ctl_table *table) 1990 { 1991 return NULL; 1992 } 1993 1994 void unregister_sysctl_table(struct ctl_table_header * table) 1995 { 1996 } 1997 1998 void setup_sysctl_set(struct ctl_table_set *p, 1999 struct ctl_table_set *parent, 2000 int (*is_seen)(struct ctl_table_set *)) 2001 { 2002 } 2003 2004 void sysctl_head_put(struct ctl_table_header *head) 2005 { 2006 } 2007 2008 #endif /* CONFIG_SYSCTL */ 2009 2010 /* 2011 * /proc/sys support 2012 */ 2013 2014 #ifdef CONFIG_PROC_SYSCTL 2015 2016 static int _proc_do_string(void* data, int maxlen, int write, 2017 void __user *buffer, 2018 size_t *lenp, loff_t *ppos) 2019 { 2020 size_t len; 2021 char __user *p; 2022 char c; 2023 2024 if (!data || !maxlen || !*lenp) { 2025 *lenp = 0; 2026 return 0; 2027 } 2028 2029 if (write) { 2030 len = 0; 2031 p = buffer; 2032 while (len < *lenp) { 2033 if (get_user(c, p++)) 2034 return -EFAULT; 2035 if (c == 0 || c == '\n') 2036 break; 2037 len++; 2038 } 2039 if (len >= maxlen) 2040 len = maxlen-1; 2041 if(copy_from_user(data, buffer, len)) 2042 return -EFAULT; 2043 ((char *) data)[len] = 0; 2044 *ppos += *lenp; 2045 } else { 2046 len = strlen(data); 2047 if (len > maxlen) 2048 len = maxlen; 2049 2050 if (*ppos > len) { 2051 *lenp = 0; 2052 return 0; 2053 } 2054 2055 data += *ppos; 2056 len -= *ppos; 2057 2058 if (len > *lenp) 2059 len = *lenp; 2060 if (len) 2061 if(copy_to_user(buffer, data, len)) 2062 return -EFAULT; 2063 if (len < *lenp) { 2064 if(put_user('\n', ((char __user *) buffer) + len)) 2065 return -EFAULT; 2066 len++; 2067 } 2068 *lenp = len; 2069 *ppos += len; 2070 } 2071 return 0; 2072 } 2073 2074 /** 2075 * proc_dostring - read a string sysctl 2076 * @table: the sysctl table 2077 * @write: %TRUE if this is a write to the sysctl file 2078 * @buffer: the user buffer 2079 * @lenp: the size of the user buffer 2080 * @ppos: file position 2081 * 2082 * Reads/writes a string from/to the user buffer. If the kernel 2083 * buffer provided is not large enough to hold the string, the 2084 * string is truncated. The copied string is %NULL-terminated. 2085 * If the string is being read by the user process, it is copied 2086 * and a newline '\n' is added. It is truncated if the buffer is 2087 * not large enough. 2088 * 2089 * Returns 0 on success. 2090 */ 2091 int proc_dostring(struct ctl_table *table, int write, 2092 void __user *buffer, size_t *lenp, loff_t *ppos) 2093 { 2094 return _proc_do_string(table->data, table->maxlen, write, 2095 buffer, lenp, ppos); 2096 } 2097 2098 static size_t proc_skip_spaces(char **buf) 2099 { 2100 size_t ret; 2101 char *tmp = skip_spaces(*buf); 2102 ret = tmp - *buf; 2103 *buf = tmp; 2104 return ret; 2105 } 2106 2107 static void proc_skip_char(char **buf, size_t *size, const char v) 2108 { 2109 while (*size) { 2110 if (**buf != v) 2111 break; 2112 (*size)--; 2113 (*buf)++; 2114 } 2115 } 2116 2117 #define TMPBUFLEN 22 2118 /** 2119 * proc_get_long - reads an ASCII formatted integer from a user buffer 2120 * 2121 * @buf: a kernel buffer 2122 * @size: size of the kernel buffer 2123 * @val: this is where the number will be stored 2124 * @neg: set to %TRUE if number is negative 2125 * @perm_tr: a vector which contains the allowed trailers 2126 * @perm_tr_len: size of the perm_tr vector 2127 * @tr: pointer to store the trailer character 2128 * 2129 * In case of success %0 is returned and @buf and @size are updated with 2130 * the amount of bytes read. If @tr is non-NULL and a trailing 2131 * character exists (size is non-zero after returning from this 2132 * function), @tr is updated with the trailing character. 2133 */ 2134 static int proc_get_long(char **buf, size_t *size, 2135 unsigned long *val, bool *neg, 2136 const char *perm_tr, unsigned perm_tr_len, char *tr) 2137 { 2138 int len; 2139 char *p, tmp[TMPBUFLEN]; 2140 2141 if (!*size) 2142 return -EINVAL; 2143 2144 len = *size; 2145 if (len > TMPBUFLEN - 1) 2146 len = TMPBUFLEN - 1; 2147 2148 memcpy(tmp, *buf, len); 2149 2150 tmp[len] = 0; 2151 p = tmp; 2152 if (*p == '-' && *size > 1) { 2153 *neg = true; 2154 p++; 2155 } else 2156 *neg = false; 2157 if (!isdigit(*p)) 2158 return -EINVAL; 2159 2160 *val = simple_strtoul(p, &p, 0); 2161 2162 len = p - tmp; 2163 2164 /* We don't know if the next char is whitespace thus we may accept 2165 * invalid integers (e.g. 1234...a) or two integers instead of one 2166 * (e.g. 123...1). So lets not allow such large numbers. */ 2167 if (len == TMPBUFLEN - 1) 2168 return -EINVAL; 2169 2170 if (len < *size && perm_tr_len && !memchr(perm_tr, *p, perm_tr_len)) 2171 return -EINVAL; 2172 2173 if (tr && (len < *size)) 2174 *tr = *p; 2175 2176 *buf += len; 2177 *size -= len; 2178 2179 return 0; 2180 } 2181 2182 /** 2183 * proc_put_long - converts an integer to a decimal ASCII formatted string 2184 * 2185 * @buf: the user buffer 2186 * @size: the size of the user buffer 2187 * @val: the integer to be converted 2188 * @neg: sign of the number, %TRUE for negative 2189 * 2190 * In case of success %0 is returned and @buf and @size are updated with 2191 * the amount of bytes written. 2192 */ 2193 static int proc_put_long(void __user **buf, size_t *size, unsigned long val, 2194 bool neg) 2195 { 2196 int len; 2197 char tmp[TMPBUFLEN], *p = tmp; 2198 2199 sprintf(p, "%s%lu", neg ? "-" : "", val); 2200 len = strlen(tmp); 2201 if (len > *size) 2202 len = *size; 2203 if (copy_to_user(*buf, tmp, len)) 2204 return -EFAULT; 2205 *size -= len; 2206 *buf += len; 2207 return 0; 2208 } 2209 #undef TMPBUFLEN 2210 2211 static int proc_put_char(void __user **buf, size_t *size, char c) 2212 { 2213 if (*size) { 2214 char __user **buffer = (char __user **)buf; 2215 if (put_user(c, *buffer)) 2216 return -EFAULT; 2217 (*size)--, (*buffer)++; 2218 *buf = *buffer; 2219 } 2220 return 0; 2221 } 2222 2223 static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp, 2224 int *valp, 2225 int write, void *data) 2226 { 2227 if (write) { 2228 *valp = *negp ? -*lvalp : *lvalp; 2229 } else { 2230 int val = *valp; 2231 if (val < 0) { 2232 *negp = true; 2233 *lvalp = (unsigned long)-val; 2234 } else { 2235 *negp = false; 2236 *lvalp = (unsigned long)val; 2237 } 2238 } 2239 return 0; 2240 } 2241 2242 static const char proc_wspace_sep[] = { ' ', '\t', '\n' }; 2243 2244 static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table, 2245 int write, void __user *buffer, 2246 size_t *lenp, loff_t *ppos, 2247 int (*conv)(bool *negp, unsigned long *lvalp, int *valp, 2248 int write, void *data), 2249 void *data) 2250 { 2251 int *i, vleft, first = 1, err = 0; 2252 unsigned long page = 0; 2253 size_t left; 2254 char *kbuf; 2255 2256 if (!tbl_data || !table->maxlen || !*lenp || (*ppos && !write)) { 2257 *lenp = 0; 2258 return 0; 2259 } 2260 2261 i = (int *) tbl_data; 2262 vleft = table->maxlen / sizeof(*i); 2263 left = *lenp; 2264 2265 if (!conv) 2266 conv = do_proc_dointvec_conv; 2267 2268 if (write) { 2269 if (left > PAGE_SIZE - 1) 2270 left = PAGE_SIZE - 1; 2271 page = __get_free_page(GFP_TEMPORARY); 2272 kbuf = (char *) page; 2273 if (!kbuf) 2274 return -ENOMEM; 2275 if (copy_from_user(kbuf, buffer, left)) { 2276 err = -EFAULT; 2277 goto free; 2278 } 2279 kbuf[left] = 0; 2280 } 2281 2282 for (; left && vleft--; i++, first=0) { 2283 unsigned long lval; 2284 bool neg; 2285 2286 if (write) { 2287 left -= proc_skip_spaces(&kbuf); 2288 2289 if (!left) 2290 break; 2291 err = proc_get_long(&kbuf, &left, &lval, &neg, 2292 proc_wspace_sep, 2293 sizeof(proc_wspace_sep), NULL); 2294 if (err) 2295 break; 2296 if (conv(&neg, &lval, i, 1, data)) { 2297 err = -EINVAL; 2298 break; 2299 } 2300 } else { 2301 if (conv(&neg, &lval, i, 0, data)) { 2302 err = -EINVAL; 2303 break; 2304 } 2305 if (!first) 2306 err = proc_put_char(&buffer, &left, '\t'); 2307 if (err) 2308 break; 2309 err = proc_put_long(&buffer, &left, lval, neg); 2310 if (err) 2311 break; 2312 } 2313 } 2314 2315 if (!write && !first && left && !err) 2316 err = proc_put_char(&buffer, &left, '\n'); 2317 if (write && !err && left) 2318 left -= proc_skip_spaces(&kbuf); 2319 free: 2320 if (write) { 2321 free_page(page); 2322 if (first) 2323 return err ? : -EINVAL; 2324 } 2325 *lenp -= left; 2326 *ppos += *lenp; 2327 return err; 2328 } 2329 2330 static int do_proc_dointvec(struct ctl_table *table, int write, 2331 void __user *buffer, size_t *lenp, loff_t *ppos, 2332 int (*conv)(bool *negp, unsigned long *lvalp, int *valp, 2333 int write, void *data), 2334 void *data) 2335 { 2336 return __do_proc_dointvec(table->data, table, write, 2337 buffer, lenp, ppos, conv, data); 2338 } 2339 2340 /** 2341 * proc_dointvec - read a vector of integers 2342 * @table: the sysctl table 2343 * @write: %TRUE if this is a write to the sysctl file 2344 * @buffer: the user buffer 2345 * @lenp: the size of the user buffer 2346 * @ppos: file position 2347 * 2348 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2349 * values from/to the user buffer, treated as an ASCII string. 2350 * 2351 * Returns 0 on success. 2352 */ 2353 int proc_dointvec(struct ctl_table *table, int write, 2354 void __user *buffer, size_t *lenp, loff_t *ppos) 2355 { 2356 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2357 NULL,NULL); 2358 } 2359 2360 /* 2361 * Taint values can only be increased 2362 * This means we can safely use a temporary. 2363 */ 2364 static int proc_taint(struct ctl_table *table, int write, 2365 void __user *buffer, size_t *lenp, loff_t *ppos) 2366 { 2367 struct ctl_table t; 2368 unsigned long tmptaint = get_taint(); 2369 int err; 2370 2371 if (write && !capable(CAP_SYS_ADMIN)) 2372 return -EPERM; 2373 2374 t = *table; 2375 t.data = &tmptaint; 2376 err = proc_doulongvec_minmax(&t, write, buffer, lenp, ppos); 2377 if (err < 0) 2378 return err; 2379 2380 if (write) { 2381 /* 2382 * Poor man's atomic or. Not worth adding a primitive 2383 * to everyone's atomic.h for this 2384 */ 2385 int i; 2386 for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) { 2387 if ((tmptaint >> i) & 1) 2388 add_taint(i); 2389 } 2390 } 2391 2392 return err; 2393 } 2394 2395 struct do_proc_dointvec_minmax_conv_param { 2396 int *min; 2397 int *max; 2398 }; 2399 2400 static int do_proc_dointvec_minmax_conv(bool *negp, unsigned long *lvalp, 2401 int *valp, 2402 int write, void *data) 2403 { 2404 struct do_proc_dointvec_minmax_conv_param *param = data; 2405 if (write) { 2406 int val = *negp ? -*lvalp : *lvalp; 2407 if ((param->min && *param->min > val) || 2408 (param->max && *param->max < val)) 2409 return -EINVAL; 2410 *valp = val; 2411 } else { 2412 int val = *valp; 2413 if (val < 0) { 2414 *negp = true; 2415 *lvalp = (unsigned long)-val; 2416 } else { 2417 *negp = false; 2418 *lvalp = (unsigned long)val; 2419 } 2420 } 2421 return 0; 2422 } 2423 2424 /** 2425 * proc_dointvec_minmax - read a vector of integers with min/max values 2426 * @table: the sysctl table 2427 * @write: %TRUE if this is a write to the sysctl file 2428 * @buffer: the user buffer 2429 * @lenp: the size of the user buffer 2430 * @ppos: file position 2431 * 2432 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2433 * values from/to the user buffer, treated as an ASCII string. 2434 * 2435 * This routine will ensure the values are within the range specified by 2436 * table->extra1 (min) and table->extra2 (max). 2437 * 2438 * Returns 0 on success. 2439 */ 2440 int proc_dointvec_minmax(struct ctl_table *table, int write, 2441 void __user *buffer, size_t *lenp, loff_t *ppos) 2442 { 2443 struct do_proc_dointvec_minmax_conv_param param = { 2444 .min = (int *) table->extra1, 2445 .max = (int *) table->extra2, 2446 }; 2447 return do_proc_dointvec(table, write, buffer, lenp, ppos, 2448 do_proc_dointvec_minmax_conv, ¶m); 2449 } 2450 2451 static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write, 2452 void __user *buffer, 2453 size_t *lenp, loff_t *ppos, 2454 unsigned long convmul, 2455 unsigned long convdiv) 2456 { 2457 unsigned long *i, *min, *max; 2458 int vleft, first = 1, err = 0; 2459 unsigned long page = 0; 2460 size_t left; 2461 char *kbuf; 2462 2463 if (!data || !table->maxlen || !*lenp || (*ppos && !write)) { 2464 *lenp = 0; 2465 return 0; 2466 } 2467 2468 i = (unsigned long *) data; 2469 min = (unsigned long *) table->extra1; 2470 max = (unsigned long *) table->extra2; 2471 vleft = table->maxlen / sizeof(unsigned long); 2472 left = *lenp; 2473 2474 if (write) { 2475 if (left > PAGE_SIZE - 1) 2476 left = PAGE_SIZE - 1; 2477 page = __get_free_page(GFP_TEMPORARY); 2478 kbuf = (char *) page; 2479 if (!kbuf) 2480 return -ENOMEM; 2481 if (copy_from_user(kbuf, buffer, left)) { 2482 err = -EFAULT; 2483 goto free; 2484 } 2485 kbuf[left] = 0; 2486 } 2487 2488 for (; left && vleft--; i++, first = 0) { 2489 unsigned long val; 2490 2491 if (write) { 2492 bool neg; 2493 2494 left -= proc_skip_spaces(&kbuf); 2495 2496 err = proc_get_long(&kbuf, &left, &val, &neg, 2497 proc_wspace_sep, 2498 sizeof(proc_wspace_sep), NULL); 2499 if (err) 2500 break; 2501 if (neg) 2502 continue; 2503 if ((min && val < *min) || (max && val > *max)) 2504 continue; 2505 *i = val; 2506 } else { 2507 val = convdiv * (*i) / convmul; 2508 if (!first) 2509 err = proc_put_char(&buffer, &left, '\t'); 2510 err = proc_put_long(&buffer, &left, val, false); 2511 if (err) 2512 break; 2513 } 2514 } 2515 2516 if (!write && !first && left && !err) 2517 err = proc_put_char(&buffer, &left, '\n'); 2518 if (write && !err) 2519 left -= proc_skip_spaces(&kbuf); 2520 free: 2521 if (write) { 2522 free_page(page); 2523 if (first) 2524 return err ? : -EINVAL; 2525 } 2526 *lenp -= left; 2527 *ppos += *lenp; 2528 return err; 2529 } 2530 2531 static int do_proc_doulongvec_minmax(struct ctl_table *table, int write, 2532 void __user *buffer, 2533 size_t *lenp, loff_t *ppos, 2534 unsigned long convmul, 2535 unsigned long convdiv) 2536 { 2537 return __do_proc_doulongvec_minmax(table->data, table, write, 2538 buffer, lenp, ppos, convmul, convdiv); 2539 } 2540 2541 /** 2542 * proc_doulongvec_minmax - read a vector of long integers with min/max values 2543 * @table: the sysctl table 2544 * @write: %TRUE if this is a write to the sysctl file 2545 * @buffer: the user buffer 2546 * @lenp: the size of the user buffer 2547 * @ppos: file position 2548 * 2549 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long 2550 * values from/to the user buffer, treated as an ASCII string. 2551 * 2552 * This routine will ensure the values are within the range specified by 2553 * table->extra1 (min) and table->extra2 (max). 2554 * 2555 * Returns 0 on success. 2556 */ 2557 int proc_doulongvec_minmax(struct ctl_table *table, int write, 2558 void __user *buffer, size_t *lenp, loff_t *ppos) 2559 { 2560 return do_proc_doulongvec_minmax(table, write, buffer, lenp, ppos, 1l, 1l); 2561 } 2562 2563 /** 2564 * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values 2565 * @table: the sysctl table 2566 * @write: %TRUE if this is a write to the sysctl file 2567 * @buffer: the user buffer 2568 * @lenp: the size of the user buffer 2569 * @ppos: file position 2570 * 2571 * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long 2572 * values from/to the user buffer, treated as an ASCII string. The values 2573 * are treated as milliseconds, and converted to jiffies when they are stored. 2574 * 2575 * This routine will ensure the values are within the range specified by 2576 * table->extra1 (min) and table->extra2 (max). 2577 * 2578 * Returns 0 on success. 2579 */ 2580 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, 2581 void __user *buffer, 2582 size_t *lenp, loff_t *ppos) 2583 { 2584 return do_proc_doulongvec_minmax(table, write, buffer, 2585 lenp, ppos, HZ, 1000l); 2586 } 2587 2588 2589 static int do_proc_dointvec_jiffies_conv(bool *negp, unsigned long *lvalp, 2590 int *valp, 2591 int write, void *data) 2592 { 2593 if (write) { 2594 if (*lvalp > LONG_MAX / HZ) 2595 return 1; 2596 *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ); 2597 } else { 2598 int val = *valp; 2599 unsigned long lval; 2600 if (val < 0) { 2601 *negp = true; 2602 lval = (unsigned long)-val; 2603 } else { 2604 *negp = false; 2605 lval = (unsigned long)val; 2606 } 2607 *lvalp = lval / HZ; 2608 } 2609 return 0; 2610 } 2611 2612 static int do_proc_dointvec_userhz_jiffies_conv(bool *negp, unsigned long *lvalp, 2613 int *valp, 2614 int write, void *data) 2615 { 2616 if (write) { 2617 if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ) 2618 return 1; 2619 *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp); 2620 } else { 2621 int val = *valp; 2622 unsigned long lval; 2623 if (val < 0) { 2624 *negp = true; 2625 lval = (unsigned long)-val; 2626 } else { 2627 *negp = false; 2628 lval = (unsigned long)val; 2629 } 2630 *lvalp = jiffies_to_clock_t(lval); 2631 } 2632 return 0; 2633 } 2634 2635 static int do_proc_dointvec_ms_jiffies_conv(bool *negp, unsigned long *lvalp, 2636 int *valp, 2637 int write, void *data) 2638 { 2639 if (write) { 2640 *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp); 2641 } else { 2642 int val = *valp; 2643 unsigned long lval; 2644 if (val < 0) { 2645 *negp = true; 2646 lval = (unsigned long)-val; 2647 } else { 2648 *negp = false; 2649 lval = (unsigned long)val; 2650 } 2651 *lvalp = jiffies_to_msecs(lval); 2652 } 2653 return 0; 2654 } 2655 2656 /** 2657 * proc_dointvec_jiffies - read a vector of integers as seconds 2658 * @table: the sysctl table 2659 * @write: %TRUE if this is a write to the sysctl file 2660 * @buffer: the user buffer 2661 * @lenp: the size of the user buffer 2662 * @ppos: file position 2663 * 2664 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2665 * values from/to the user buffer, treated as an ASCII string. 2666 * The values read are assumed to be in seconds, and are converted into 2667 * jiffies. 2668 * 2669 * Returns 0 on success. 2670 */ 2671 int proc_dointvec_jiffies(struct ctl_table *table, int write, 2672 void __user *buffer, size_t *lenp, loff_t *ppos) 2673 { 2674 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2675 do_proc_dointvec_jiffies_conv,NULL); 2676 } 2677 2678 /** 2679 * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds 2680 * @table: the sysctl table 2681 * @write: %TRUE if this is a write to the sysctl file 2682 * @buffer: the user buffer 2683 * @lenp: the size of the user buffer 2684 * @ppos: pointer to the file position 2685 * 2686 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2687 * values from/to the user buffer, treated as an ASCII string. 2688 * The values read are assumed to be in 1/USER_HZ seconds, and 2689 * are converted into jiffies. 2690 * 2691 * Returns 0 on success. 2692 */ 2693 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, 2694 void __user *buffer, size_t *lenp, loff_t *ppos) 2695 { 2696 return do_proc_dointvec(table,write,buffer,lenp,ppos, 2697 do_proc_dointvec_userhz_jiffies_conv,NULL); 2698 } 2699 2700 /** 2701 * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds 2702 * @table: the sysctl table 2703 * @write: %TRUE if this is a write to the sysctl file 2704 * @buffer: the user buffer 2705 * @lenp: the size of the user buffer 2706 * @ppos: file position 2707 * @ppos: the current position in the file 2708 * 2709 * Reads/writes up to table->maxlen/sizeof(unsigned int) integer 2710 * values from/to the user buffer, treated as an ASCII string. 2711 * The values read are assumed to be in 1/1000 seconds, and 2712 * are converted into jiffies. 2713 * 2714 * Returns 0 on success. 2715 */ 2716 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, 2717 void __user *buffer, size_t *lenp, loff_t *ppos) 2718 { 2719 return do_proc_dointvec(table, write, buffer, lenp, ppos, 2720 do_proc_dointvec_ms_jiffies_conv, NULL); 2721 } 2722 2723 static int proc_do_cad_pid(struct ctl_table *table, int write, 2724 void __user *buffer, size_t *lenp, loff_t *ppos) 2725 { 2726 struct pid *new_pid; 2727 pid_t tmp; 2728 int r; 2729 2730 tmp = pid_vnr(cad_pid); 2731 2732 r = __do_proc_dointvec(&tmp, table, write, buffer, 2733 lenp, ppos, NULL, NULL); 2734 if (r || !write) 2735 return r; 2736 2737 new_pid = find_get_pid(tmp); 2738 if (!new_pid) 2739 return -ESRCH; 2740 2741 put_pid(xchg(&cad_pid, new_pid)); 2742 return 0; 2743 } 2744 2745 /** 2746 * proc_do_large_bitmap - read/write from/to a large bitmap 2747 * @table: the sysctl table 2748 * @write: %TRUE if this is a write to the sysctl file 2749 * @buffer: the user buffer 2750 * @lenp: the size of the user buffer 2751 * @ppos: file position 2752 * 2753 * The bitmap is stored at table->data and the bitmap length (in bits) 2754 * in table->maxlen. 2755 * 2756 * We use a range comma separated format (e.g. 1,3-4,10-10) so that 2757 * large bitmaps may be represented in a compact manner. Writing into 2758 * the file will clear the bitmap then update it with the given input. 2759 * 2760 * Returns 0 on success. 2761 */ 2762 int proc_do_large_bitmap(struct ctl_table *table, int write, 2763 void __user *buffer, size_t *lenp, loff_t *ppos) 2764 { 2765 int err = 0; 2766 bool first = 1; 2767 size_t left = *lenp; 2768 unsigned long bitmap_len = table->maxlen; 2769 unsigned long *bitmap = (unsigned long *) table->data; 2770 unsigned long *tmp_bitmap = NULL; 2771 char tr_a[] = { '-', ',', '\n' }, tr_b[] = { ',', '\n', 0 }, c; 2772 2773 if (!bitmap_len || !left || (*ppos && !write)) { 2774 *lenp = 0; 2775 return 0; 2776 } 2777 2778 if (write) { 2779 unsigned long page = 0; 2780 char *kbuf; 2781 2782 if (left > PAGE_SIZE - 1) 2783 left = PAGE_SIZE - 1; 2784 2785 page = __get_free_page(GFP_TEMPORARY); 2786 kbuf = (char *) page; 2787 if (!kbuf) 2788 return -ENOMEM; 2789 if (copy_from_user(kbuf, buffer, left)) { 2790 free_page(page); 2791 return -EFAULT; 2792 } 2793 kbuf[left] = 0; 2794 2795 tmp_bitmap = kzalloc(BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long), 2796 GFP_KERNEL); 2797 if (!tmp_bitmap) { 2798 free_page(page); 2799 return -ENOMEM; 2800 } 2801 proc_skip_char(&kbuf, &left, '\n'); 2802 while (!err && left) { 2803 unsigned long val_a, val_b; 2804 bool neg; 2805 2806 err = proc_get_long(&kbuf, &left, &val_a, &neg, tr_a, 2807 sizeof(tr_a), &c); 2808 if (err) 2809 break; 2810 if (val_a >= bitmap_len || neg) { 2811 err = -EINVAL; 2812 break; 2813 } 2814 2815 val_b = val_a; 2816 if (left) { 2817 kbuf++; 2818 left--; 2819 } 2820 2821 if (c == '-') { 2822 err = proc_get_long(&kbuf, &left, &val_b, 2823 &neg, tr_b, sizeof(tr_b), 2824 &c); 2825 if (err) 2826 break; 2827 if (val_b >= bitmap_len || neg || 2828 val_a > val_b) { 2829 err = -EINVAL; 2830 break; 2831 } 2832 if (left) { 2833 kbuf++; 2834 left--; 2835 } 2836 } 2837 2838 while (val_a <= val_b) 2839 set_bit(val_a++, tmp_bitmap); 2840 2841 first = 0; 2842 proc_skip_char(&kbuf, &left, '\n'); 2843 } 2844 free_page(page); 2845 } else { 2846 unsigned long bit_a, bit_b = 0; 2847 2848 while (left) { 2849 bit_a = find_next_bit(bitmap, bitmap_len, bit_b); 2850 if (bit_a >= bitmap_len) 2851 break; 2852 bit_b = find_next_zero_bit(bitmap, bitmap_len, 2853 bit_a + 1) - 1; 2854 2855 if (!first) { 2856 err = proc_put_char(&buffer, &left, ','); 2857 if (err) 2858 break; 2859 } 2860 err = proc_put_long(&buffer, &left, bit_a, false); 2861 if (err) 2862 break; 2863 if (bit_a != bit_b) { 2864 err = proc_put_char(&buffer, &left, '-'); 2865 if (err) 2866 break; 2867 err = proc_put_long(&buffer, &left, bit_b, false); 2868 if (err) 2869 break; 2870 } 2871 2872 first = 0; bit_b++; 2873 } 2874 if (!err) 2875 err = proc_put_char(&buffer, &left, '\n'); 2876 } 2877 2878 if (!err) { 2879 if (write) { 2880 if (*ppos) 2881 bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len); 2882 else 2883 memcpy(bitmap, tmp_bitmap, 2884 BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long)); 2885 } 2886 kfree(tmp_bitmap); 2887 *lenp -= left; 2888 *ppos += *lenp; 2889 return 0; 2890 } else { 2891 kfree(tmp_bitmap); 2892 return err; 2893 } 2894 } 2895 2896 #else /* CONFIG_PROC_FS */ 2897 2898 int proc_dostring(struct ctl_table *table, int write, 2899 void __user *buffer, size_t *lenp, loff_t *ppos) 2900 { 2901 return -ENOSYS; 2902 } 2903 2904 int proc_dointvec(struct ctl_table *table, int write, 2905 void __user *buffer, size_t *lenp, loff_t *ppos) 2906 { 2907 return -ENOSYS; 2908 } 2909 2910 int proc_dointvec_minmax(struct ctl_table *table, int write, 2911 void __user *buffer, size_t *lenp, loff_t *ppos) 2912 { 2913 return -ENOSYS; 2914 } 2915 2916 int proc_dointvec_jiffies(struct ctl_table *table, int write, 2917 void __user *buffer, size_t *lenp, loff_t *ppos) 2918 { 2919 return -ENOSYS; 2920 } 2921 2922 int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, 2923 void __user *buffer, size_t *lenp, loff_t *ppos) 2924 { 2925 return -ENOSYS; 2926 } 2927 2928 int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, 2929 void __user *buffer, size_t *lenp, loff_t *ppos) 2930 { 2931 return -ENOSYS; 2932 } 2933 2934 int proc_doulongvec_minmax(struct ctl_table *table, int write, 2935 void __user *buffer, size_t *lenp, loff_t *ppos) 2936 { 2937 return -ENOSYS; 2938 } 2939 2940 int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, 2941 void __user *buffer, 2942 size_t *lenp, loff_t *ppos) 2943 { 2944 return -ENOSYS; 2945 } 2946 2947 2948 #endif /* CONFIG_PROC_FS */ 2949 2950 /* 2951 * No sense putting this after each symbol definition, twice, 2952 * exception granted :-) 2953 */ 2954 EXPORT_SYMBOL(proc_dointvec); 2955 EXPORT_SYMBOL(proc_dointvec_jiffies); 2956 EXPORT_SYMBOL(proc_dointvec_minmax); 2957 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies); 2958 EXPORT_SYMBOL(proc_dointvec_ms_jiffies); 2959 EXPORT_SYMBOL(proc_dostring); 2960 EXPORT_SYMBOL(proc_doulongvec_minmax); 2961 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax); 2962 EXPORT_SYMBOL(register_sysctl_table); 2963 EXPORT_SYMBOL(register_sysctl_paths); 2964 EXPORT_SYMBOL(unregister_sysctl_table); 2965