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   1 /*
   2  *  linux/fs/proc/proc_misc.c
   3  *
   4  *  linux/fs/proc/array.c
   5  *  Copyright (C) 1992  by Linus Torvalds
   6  *  based on ideas by Darren Senn
   7  *
   8  *  This used to be the part of array.c. See the rest of history and credits
   9  *  there. I took this into a separate file and switched the thing to generic
  10  *  proc_file_inode_operations, leaving in array.c only per-process stuff.
  11  *  Inumbers allocation made dynamic (via create_proc_entry()).  AV, May 1999.
  12  *
  13  * Changes:
  14  * Fulton Green      :  Encapsulated position metric calculations.
  15  *                      <kernel@FultonGreen.com>
  16  */
  17
  18 #include <linux/types.h>
  19 #include <linux/errno.h>
  20 #include <linux/time.h>
  21 #include <linux/kernel.h>
  22 #include <linux/kernel_stat.h>
  23 #include <linux/fs.h>
  24 #include <linux/tty.h>
  25 #include <linux/string.h>
  26 #include <linux/mman.h>
  27 #include <linux/proc_fs.h>
  28 #include <linux/ioport.h>
  29 #include <linux/config.h>
  30 #include <linux/mm.h>
  31 #include <linux/mmzone.h>
  32 #include <linux/pagemap.h>
  33 #include <linux/swap.h>
  34 #include <linux/slab.h>
  35 #include <linux/smp.h>
  36 #include <linux/signal.h>
  37 #include <linux/module.h>
  38 #include <linux/init.h>
  39 #include <linux/smp_lock.h>
  40 #include <linux/seq_file.h>
  41 #include <linux/times.h>
  42 #include <linux/profile.h>
  43 #include <linux/blkdev.h>
  44 #include <linux/hugetlb.h>
  45 #include <linux/jiffies.h>
  46 #include <linux/sysrq.h>
  47 #include <linux/vmalloc.h>
  48 #include <linux/crash_dump.h>
  49 #include <asm/uaccess.h>
  50 #include <asm/pgtable.h>
  51 #include <asm/io.h>
  52 #include <asm/tlb.h>
  53 #include <asm/div64.h>
  54 #include "internal.h"
  55
  56 #define LOAD_INT(x) ((x) >> FSHIFT)
  57 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  58 /*
  59  * Warning: stuff below (imported functions) assumes that its output will fit
  60  * into one page. For some of those functions it may be wrong. Moreover, we
  61  * have a way to deal with that gracefully. Right now I used straightforward
  62  * wrappers, but this needs further analysis wrt potential overflows.
  63  */
  64 extern int get_hardware_list(char *);
  65 extern int get_stram_list(char *);
  66 extern int get_filesystem_list(char *);
  67 extern int get_exec_domain_list(char *);
  68 extern int get_dma_list(char *);
  69 extern int get_locks_status (char *, char **, off_t, int);
  70
  71 static int proc_calc_metrics(char *page, char **start, off_t off,
  72                                  int count, int *eof, int len)
  73 {
  74         if (len <= off+count) *eof = 1;
  75         *start = page + off;
  76         len -= off;
  77         if (len>count) len = count;
  78         if (len<0) len = 0;
  79         return len;
  80 }
  81
  82 static int loadavg_read_proc(char *page, char **start, off_t off,
  83                                  int count, int *eof, void *data)
  84 {
  85         int a, b, c;
  86         int len;
  87
  88         a = avenrun[0] + (FIXED_1/200);
  89         b = avenrun[1] + (FIXED_1/200);
  90         c = avenrun[2] + (FIXED_1/200);
  91         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
  92                 LOAD_INT(a), LOAD_FRAC(a),
  93                 LOAD_INT(b), LOAD_FRAC(b),
  94                 LOAD_INT(c), LOAD_FRAC(c),
  95                 nr_running(), nr_threads, last_pid);
  96         return proc_calc_metrics(page, start, off, count, eof, len);
  97 }
  98
  99 static int uptime_read_proc(char *page, char **start, off_t off,
 100                                  int count, int *eof, void *data)
 101 {
 102         struct timespec uptime;
 103         struct timespec idle;
 104         int len;
 105         cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
 106
 107         do_posix_clock_monotonic_gettime(&uptime);
 108         cputime_to_timespec(idletime, &idle);
 109         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 110                         (unsigned long) uptime.tv_sec,
 111                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
 112                         (unsigned long) idle.tv_sec,
 113                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
 114
 115         return proc_calc_metrics(page, start, off, count, eof, len);
 116 }
 117
 118 static int meminfo_read_proc(char *page, char **start, off_t off,
 119                                  int count, int *eof, void *data)
 120 {
 121         struct sysinfo i;
 122         int len;
 123         struct page_state ps;
 124         unsigned long inactive;
 125         unsigned long active;
 126         unsigned long free;
 127         unsigned long committed;
 128         unsigned long allowed;
 129         struct vmalloc_info vmi;
 130         long cached;
 131
 132         get_page_state(&ps);
 133         get_zone_counts(&active, &inactive, &free);
 134
 135 /*
 136  * display in kilobytes.
 137  */
 138 #define K(x) ((x) << (PAGE_SHIFT - 10))
 139         si_meminfo(&i);
 140         si_swapinfo(&i);
 141         committed = atomic_read(&vm_committed_space);
 142         allowed = ((totalram_pages - hugetlb_total_pages())
 143                 * sysctl_overcommit_ratio / 100) + total_swap_pages;
 144
 145         cached = global_page_state(NR_FILE_PAGES) -
 146                         total_swapcache_pages - i.bufferram;
 147         if (cached < 0)
 148                 cached = 0;
 149
 150         get_vmalloc_info(&vmi);
 151
 152         /*
 153          * Tagged format, for easy grepping and expansion.
 154          */
 155         len = sprintf(page,
 156                 "MemTotal:     %8lu kB\n"
 157                 "MemFree:      %8lu kB\n"
 158                 "Buffers:      %8lu kB\n"
 159                 "Cached:       %8lu kB\n"
 160                 "SwapCached:   %8lu kB\n"
 161                 "Active:       %8lu kB\n"
 162                 "Inactive:     %8lu kB\n"
 163                 "HighTotal:    %8lu kB\n"
 164                 "HighFree:     %8lu kB\n"
 165                 "LowTotal:     %8lu kB\n"
 166                 "LowFree:      %8lu kB\n"
 167                 "SwapTotal:    %8lu kB\n"
 168                 "SwapFree:     %8lu kB\n"
 169                 "Dirty:        %8lu kB\n"
 170                 "Writeback:    %8lu kB\n"
 171                 "AnonPages:    %8lu kB\n"
 172                 "Mapped:       %8lu kB\n"
 173                 "Slab:         %8lu kB\n"
 174                 "PageTables:   %8lu kB\n"
 175                 "CommitLimit:  %8lu kB\n"
 176                 "Committed_AS: %8lu kB\n"
 177                 "VmallocTotal: %8lu kB\n"
 178                 "VmallocUsed:  %8lu kB\n"
 179                 "VmallocChunk: %8lu kB\n",
 180                 K(i.totalram),
 181                 K(i.freeram),
 182                 K(i.bufferram),
 183                 K(cached),
 184                 K(total_swapcache_pages),
 185                 K(active),
 186                 K(inactive),
 187                 K(i.totalhigh),
 188                 K(i.freehigh),
 189                 K(i.totalram-i.totalhigh),
 190                 K(i.freeram-i.freehigh),
 191                 K(i.totalswap),
 192                 K(i.freeswap),
 193                 K(global_page_state(NR_FILE_DIRTY)),
 194                 K(ps.nr_writeback),
 195                 K(global_page_state(NR_ANON_PAGES)),
 196                 K(global_page_state(NR_FILE_MAPPED)),
 197                 K(global_page_state(NR_SLAB)),
 198                 K(global_page_state(NR_PAGETABLE)),
 199                 K(allowed),
 200                 K(committed),
 201                 (unsigned long)VMALLOC_TOTAL >> 10,
 202                 vmi.used >> 10,
 203                 vmi.largest_chunk >> 10
 204                 );
 205
 206                 len += hugetlb_report_meminfo(page + len);
 207
 208         return proc_calc_metrics(page, start, off, count, eof, len);
 209 #undef K
 210 }
 211
 212 extern struct seq_operations fragmentation_op;
 213 static int fragmentation_open(struct inode *inode, struct file *file)
 214 {
 215         (void)inode;
 216         return seq_open(file, &fragmentation_op);
 217 }
 218
 219 static struct file_operations fragmentation_file_operations = {
 220         .open           = fragmentation_open,
 221         .read           = seq_read,
 222         .llseek         = seq_lseek,
 223         .release        = seq_release,
 224 };
 225
 226 extern struct seq_operations zoneinfo_op;
 227 static int zoneinfo_open(struct inode *inode, struct file *file)
 228 {
 229         return seq_open(file, &zoneinfo_op);
 230 }
 231
 232 static struct file_operations proc_zoneinfo_file_operations = {
 233         .open           = zoneinfo_open,
 234         .read           = seq_read,
 235         .llseek         = seq_lseek,
 236         .release        = seq_release,
 237 };
 238
 239 static int version_read_proc(char *page, char **start, off_t off,
 240                                  int count, int *eof, void *data)
 241 {
 242         int len;
 243
 244         strcpy(page, linux_banner);
 245         len = strlen(page);
 246         return proc_calc_metrics(page, start, off, count, eof, len);
 247 }
 248
 249 extern struct seq_operations cpuinfo_op;
 250 static int cpuinfo_open(struct inode *inode, struct file *file)
 251 {
 252         return seq_open(file, &cpuinfo_op);
 253 }
 254
 255 static struct file_operations proc_cpuinfo_operations = {
 256         .open           = cpuinfo_open,
 257         .read           = seq_read,
 258         .llseek         = seq_lseek,
 259         .release        = seq_release,
 260 };
 261
 262 static int devinfo_show(struct seq_file *f, void *v)
 263 {
 264         int i = *(loff_t *) v;
 265
 266         if (i < CHRDEV_MAJOR_HASH_SIZE) {
 267                 if (i == 0)
 268                         seq_printf(f, "Character devices:\n");
 269                 chrdev_show(f, i);
 270         } else {
 271                 i -= CHRDEV_MAJOR_HASH_SIZE;
 272                 if (i == 0)
 273                         seq_printf(f, "\nBlock devices:\n");
 274                 blkdev_show(f, i);
 275         }
 276         return 0;
 277 }
 278
 279 static void *devinfo_start(struct seq_file *f, loff_t *pos)
 280 {
 281         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 282                 return pos;
 283         return NULL;
 284 }
 285
 286 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
 287 {
 288         (*pos)++;
 289         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 290                 return NULL;
 291         return pos;
 292 }
 293
 294 static void devinfo_stop(struct seq_file *f, void *v)
 295 {
 296         /* Nothing to do */
 297 }
 298
 299 static struct seq_operations devinfo_ops = {
 300         .start = devinfo_start,
 301         .next  = devinfo_next,
 302         .stop  = devinfo_stop,
 303         .show  = devinfo_show
 304 };
 305
 306 static int devinfo_open(struct inode *inode, struct file *filp)
 307 {
 308         return seq_open(filp, &devinfo_ops);
 309 }
 310
 311 static struct file_operations proc_devinfo_operations = {
 312         .open           = devinfo_open,
 313         .read           = seq_read,
 314         .llseek         = seq_lseek,
 315         .release        = seq_release,
 316 };
 317
 318 extern struct seq_operations vmstat_op;
 319 static int vmstat_open(struct inode *inode, struct file *file)
 320 {
 321         return seq_open(file, &vmstat_op);
 322 }
 323 static struct file_operations proc_vmstat_file_operations = {
 324         .open           = vmstat_open,
 325         .read           = seq_read,
 326         .llseek         = seq_lseek,
 327         .release        = seq_release,
 328 };
 329
 330 #ifdef CONFIG_PROC_HARDWARE
 331 static int hardware_read_proc(char *page, char **start, off_t off,
 332                                  int count, int *eof, void *data)
 333 {
 334         int len = get_hardware_list(page);
 335         return proc_calc_metrics(page, start, off, count, eof, len);
 336 }
 337 #endif
 338
 339 #ifdef CONFIG_STRAM_PROC
 340 static int stram_read_proc(char *page, char **start, off_t off,
 341                                  int count, int *eof, void *data)
 342 {
 343         int len = get_stram_list(page);
 344         return proc_calc_metrics(page, start, off, count, eof, len);
 345 }
 346 #endif
 347
 348 extern struct seq_operations partitions_op;
 349 static int partitions_open(struct inode *inode, struct file *file)
 350 {
 351         return seq_open(file, &partitions_op);
 352 }
 353 static struct file_operations proc_partitions_operations = {
 354         .open           = partitions_open,
 355         .read           = seq_read,
 356         .llseek         = seq_lseek,
 357         .release        = seq_release,
 358 };
 359
 360 extern struct seq_operations diskstats_op;
 361 static int diskstats_open(struct inode *inode, struct file *file)
 362 {
 363         return seq_open(file, &diskstats_op);
 364 }
 365 static struct file_operations proc_diskstats_operations = {
 366         .open           = diskstats_open,
 367         .read           = seq_read,
 368         .llseek         = seq_lseek,
 369         .release        = seq_release,
 370 };
 371
 372 #ifdef CONFIG_MODULES
 373 extern struct seq_operations modules_op;
 374 static int modules_open(struct inode *inode, struct file *file)
 375 {
 376         return seq_open(file, &modules_op);
 377 }
 378 static struct file_operations proc_modules_operations = {
 379         .open           = modules_open,
 380         .read           = seq_read,
 381         .llseek         = seq_lseek,
 382         .release        = seq_release,
 383 };
 384 #endif
 385
 386 #ifdef CONFIG_SLAB
 387 extern struct seq_operations slabinfo_op;
 388 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 389 static int slabinfo_open(struct inode *inode, struct file *file)
 390 {
 391         return seq_open(file, &slabinfo_op);
 392 }
 393 static struct file_operations proc_slabinfo_operations = {
 394         .open           = slabinfo_open,
 395         .read           = seq_read,
 396         .write          = slabinfo_write,
 397         .llseek         = seq_lseek,
 398         .release        = seq_release,
 399 };
 400
 401 #ifdef CONFIG_DEBUG_SLAB_LEAK
 402 extern struct seq_operations slabstats_op;
 403 static int slabstats_open(struct inode *inode, struct file *file)
 404 {
 405         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
 406         int ret = -ENOMEM;
 407         if (n) {
 408                 ret = seq_open(file, &slabstats_op);
 409                 if (!ret) {
 410                         struct seq_file *m = file->private_data;
 411                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
 412                         m->private = n;
 413                         n = NULL;
 414                 }
 415                 kfree(n);
 416         }
 417         return ret;
 418 }
 419
 420 static int slabstats_release(struct inode *inode, struct file *file)
 421 {
 422         struct seq_file *m = file->private_data;
 423         kfree(m->private);
 424         return seq_release(inode, file);
 425 }
 426
 427 static struct file_operations proc_slabstats_operations = {
 428         .open           = slabstats_open,
 429         .read           = seq_read,
 430         .llseek         = seq_lseek,
 431         .release        = slabstats_release,
 432 };
 433 #endif
 434 #endif
 435
 436 static int show_stat(struct seq_file *p, void *v)
 437 {
 438         int i;
 439         unsigned long jif;
 440         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
 441         u64 sum = 0;
 442
 443         user = nice = system = idle = iowait =
 444                 irq = softirq = steal = cputime64_zero;
 445         jif = - wall_to_monotonic.tv_sec;
 446         if (wall_to_monotonic.tv_nsec)
 447                 --jif;
 448
 449         for_each_possible_cpu(i) {
 450                 int j;
 451
 452                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
 453                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
 454                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
 455                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
 456                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
 457                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
 458                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
 459                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
 460                 for (j = 0 ; j < NR_IRQS ; j++)
 461                         sum += kstat_cpu(i).irqs[j];
 462         }
 463
 464         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",
 465                 (unsigned long long)cputime64_to_clock_t(user),
 466                 (unsigned long long)cputime64_to_clock_t(nice),
 467                 (unsigned long long)cputime64_to_clock_t(system),
 468                 (unsigned long long)cputime64_to_clock_t(idle),
 469                 (unsigned long long)cputime64_to_clock_t(iowait),
 470                 (unsigned long long)cputime64_to_clock_t(irq),
 471                 (unsigned long long)cputime64_to_clock_t(softirq),
 472                 (unsigned long long)cputime64_to_clock_t(steal));
 473         for_each_online_cpu(i) {
 474
 475                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 476                 user = kstat_cpu(i).cpustat.user;
 477                 nice = kstat_cpu(i).cpustat.nice;
 478                 system = kstat_cpu(i).cpustat.system;
 479                 idle = kstat_cpu(i).cpustat.idle;
 480                 iowait = kstat_cpu(i).cpustat.iowait;
 481                 irq = kstat_cpu(i).cpustat.irq;
 482                 softirq = kstat_cpu(i).cpustat.softirq;
 483                 steal = kstat_cpu(i).cpustat.steal;
 484                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
 485                         i,
 486                         (unsigned long long)cputime64_to_clock_t(user),
 487                         (unsigned long long)cputime64_to_clock_t(nice),
 488                         (unsigned long long)cputime64_to_clock_t(system),
 489                         (unsigned long long)cputime64_to_clock_t(idle),
 490                         (unsigned long long)cputime64_to_clock_t(iowait),
 491                         (unsigned long long)cputime64_to_clock_t(irq),
 492                         (unsigned long long)cputime64_to_clock_t(softirq),
 493                         (unsigned long long)cputime64_to_clock_t(steal));
 494         }
 495         seq_printf(p, "intr %llu", (unsigned long long)sum);
 496
 497 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
 498         for (i = 0; i < NR_IRQS; i++)
 499                 seq_printf(p, " %u", kstat_irqs(i));
 500 #endif
 501
 502         seq_printf(p,
 503                 "\nctxt %llu\n"
 504                 "btime %lu\n"
 505                 "processes %lu\n"
 506                 "procs_running %lu\n"
 507                 "procs_blocked %lu\n",
 508                 nr_context_switches(),
 509                 (unsigned long)jif,
 510                 total_forks,
 511                 nr_running(),
 512                 nr_iowait());
 513
 514         return 0;
 515 }
 516
 517 static int stat_open(struct inode *inode, struct file *file)
 518 {
 519         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 520         char *buf;
 521         struct seq_file *m;
 522         int res;
 523
 524         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 525         if (size > 128 * 1024)
 526                 size = 128 * 1024;
 527         buf = kmalloc(size, GFP_KERNEL);
 528         if (!buf)
 529                 return -ENOMEM;
 530
 531         res = single_open(file, show_stat, NULL);
 532         if (!res) {
 533                 m = file->private_data;
 534                 m->buf = buf;
 535                 m->size = size;
 536         } else
 537                 kfree(buf);
 538         return res;
 539 }
 540 static struct file_operations proc_stat_operations = {
 541         .open           = stat_open,
 542         .read           = seq_read,
 543         .llseek         = seq_lseek,
 544         .release        = single_release,
 545 };
 546
 547 /*
 548  * /proc/interrupts
 549  */
 550 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 551 {
 552         return (*pos <= NR_IRQS) ? pos : NULL;
 553 }
 554
 555 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 556 {
 557         (*pos)++;
 558         if (*pos > NR_IRQS)
 559                 return NULL;
 560         return pos;
 561 }
 562
 563 static void int_seq_stop(struct seq_file *f, void *v)
 564 {
 565         /* Nothing to do */
 566 }
 567
 568
 569 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 570 static struct seq_operations int_seq_ops = {
 571         .start = int_seq_start,
 572         .next  = int_seq_next,
 573         .stop  = int_seq_stop,
 574         .show  = show_interrupts
 575 };
 576
 577 static int interrupts_open(struct inode *inode, struct file *filp)
 578 {
 579         return seq_open(filp, &int_seq_ops);
 580 }
 581
 582 static struct file_operations proc_interrupts_operations = {
 583         .open           = interrupts_open,
 584         .read           = seq_read,
 585         .llseek         = seq_lseek,
 586         .release        = seq_release,
 587 };
 588
 589 static int filesystems_read_proc(char *page, char **start, off_t off,
 590                                  int count, int *eof, void *data)
 591 {
 592         int len = get_filesystem_list(page);
 593         return proc_calc_metrics(page, start, off, count, eof, len);
 594 }
 595
 596 static int cmdline_read_proc(char *page, char **start, off_t off,
 597                                  int count, int *eof, void *data)
 598 {
 599         int len;
 600
 601         len = sprintf(page, "%s\n", saved_command_line);
 602         return proc_calc_metrics(page, start, off, count, eof, len);
 603 }
 604
 605 static int locks_read_proc(char *page, char **start, off_t off,
 606                                  int count, int *eof, void *data)
 607 {
 608         int len = get_locks_status(page, start, off, count);
 609
 610         if (len < count)
 611                 *eof = 1;
 612         return len;
 613 }
 614
 615 static int execdomains_read_proc(char *page, char **start, off_t off,
 616                                  int count, int *eof, void *data)
 617 {
 618         int len = get_exec_domain_list(page);
 619         return proc_calc_metrics(page, start, off, count, eof, len);
 620 }
 621
 622 #ifdef CONFIG_MAGIC_SYSRQ
 623 /*
 624  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 625  */
 626 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 627                                    size_t count, loff_t *ppos)
 628 {
 629         if (count) {
 630                 char c;
 631
 632                 if (get_user(c, buf))
 633                         return -EFAULT;
 634                 __handle_sysrq(c, NULL, NULL, 0);
 635         }
 636         return count;
 637 }
 638
 639 static struct file_operations proc_sysrq_trigger_operations = {
 640         .write          = write_sysrq_trigger,
 641 };
 642 #endif
 643
 644 struct proc_dir_entry *proc_root_kcore;
 645
 646 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
 647 {
 648         struct proc_dir_entry *entry;
 649         entry = create_proc_entry(name, mode, NULL);
 650         if (entry)
 651                 entry->proc_fops = f;
 652 }
 653
 654 void __init proc_misc_init(void)
 655 {
 656         struct proc_dir_entry *entry;
 657         static struct {
 658                 char *name;
 659                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 660         } *p, simple_ones[] = {
 661                 {"loadavg",     loadavg_read_proc},
 662                 {"uptime",      uptime_read_proc},
 663                 {"meminfo",     meminfo_read_proc},
 664                 {"version",     version_read_proc},
 665 #ifdef CONFIG_PROC_HARDWARE
 666                 {"hardware",    hardware_read_proc},
 667 #endif
 668 #ifdef CONFIG_STRAM_PROC
 669                 {"stram",       stram_read_proc},
 670 #endif
 671                 {"filesystems", filesystems_read_proc},
 672                 {"cmdline",     cmdline_read_proc},
 673                 {"locks",       locks_read_proc},
 674                 {"execdomains", execdomains_read_proc},
 675                 {NULL,}
 676         };
 677         for (p = simple_ones; p->name; p++)
 678                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 679
 680         proc_symlink("mounts", NULL, "self/mounts");
 681
 682         /* And now for trickier ones */
 683         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 684         if (entry)
 685                 entry->proc_fops = &proc_kmsg_operations;
 686         create_seq_entry("devices", 0, &proc_devinfo_operations);
 687         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 688         create_seq_entry("partitions", 0, &proc_partitions_operations);
 689         create_seq_entry("stat", 0, &proc_stat_operations);
 690         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 691 #ifdef CONFIG_SLAB
 692         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 693 #ifdef CONFIG_DEBUG_SLAB_LEAK
 694         create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
 695 #endif
 696 #endif
 697         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 698         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 699         create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
 700         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 701 #ifdef CONFIG_MODULES
 702         create_seq_entry("modules", 0, &proc_modules_operations);
 703 #endif
 704 #ifdef CONFIG_SCHEDSTATS
 705         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
 706 #endif
 707 #ifdef CONFIG_PROC_KCORE
 708         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 709         if (proc_root_kcore) {
 710                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 711                 proc_root_kcore->size =
 712                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 713         }
 714 #endif
 715 #ifdef CONFIG_PROC_VMCORE
 716         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
 717         if (proc_vmcore)
 718                 proc_vmcore->proc_fops = &proc_vmcore_operations;
 719 #endif
 720 #ifdef CONFIG_MAGIC_SYSRQ
 721         entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 722         if (entry)
 723                 entry->proc_fops = &proc_sysrq_trigger_operations;
 724 #endif
 725 }