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