kernel/sysctl.c

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