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