kernel/sysctl.c

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