kernel/sysctl.c

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