fs/proc/proc_misc.c

   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 = get_page_cache_size() - total_swapcache_pages - i.bufferram;
 146         if (cached < 0)
 147                 cached = 0;
 148
 149         get_vmalloc_info(&vmi);
 150
 151         /*
 152          * Tagged format, for easy grepping and expansion.
 153          */
 154         len = sprintf(page,
 155                 "MemTotal:     %8lu kB\n"
 156                 "MemFree:      %8lu kB\n"
 157                 "Buffers:      %8lu kB\n"
 158                 "Cached:       %8lu kB\n"
 159                 "SwapCached:   %8lu kB\n"
 160                 "Active:       %8lu kB\n"
 161                 "Inactive:     %8lu kB\n"
 162                 "HighTotal:    %8lu kB\n"
 163                 "HighFree:     %8lu kB\n"
 164                 "LowTotal:     %8lu kB\n"
 165                 "LowFree:      %8lu kB\n"
 166                 "SwapTotal:    %8lu kB\n"
 167                 "SwapFree:     %8lu kB\n"
 168                 "Dirty:        %8lu kB\n"
 169                 "Writeback:    %8lu kB\n"
 170                 "Mapped:       %8lu kB\n"
 171                 "Slab:         %8lu kB\n"
 172                 "CommitLimit:  %8lu kB\n"
 173                 "Committed_AS: %8lu kB\n"
 174                 "PageTables:   %8lu kB\n"
 175                 "VmallocTotal: %8lu kB\n"
 176                 "VmallocUsed:  %8lu kB\n"
 177                 "VmallocChunk: %8lu kB\n",
 178                 K(i.totalram),
 179                 K(i.freeram),
 180                 K(i.bufferram),
 181                 K(cached),
 182                 K(total_swapcache_pages),
 183                 K(active),
 184                 K(inactive),
 185                 K(i.totalhigh),
 186                 K(i.freehigh),
 187                 K(i.totalram-i.totalhigh),
 188                 K(i.freeram-i.freehigh),
 189                 K(i.totalswap),
 190                 K(i.freeswap),
 191                 K(ps.nr_dirty),
 192                 K(ps.nr_writeback),
 193                 K(ps.nr_mapped),
 194                 K(ps.nr_slab),
 195                 K(allowed),
 196                 K(committed),
 197                 K(ps.nr_page_table_pages),
 198                 (unsigned long)VMALLOC_TOTAL >> 10,
 199                 vmi.used >> 10,
 200                 vmi.largest_chunk >> 10
 201                 );
 202
 203                 len += hugetlb_report_meminfo(page + len);
 204
 205         return proc_calc_metrics(page, start, off, count, eof, len);
 206 #undef K
 207 }
 208
 209 extern struct seq_operations fragmentation_op;
 210 static int fragmentation_open(struct inode *inode, struct file *file)
 211 {
 212         (void)inode;
 213         return seq_open(file, &fragmentation_op);
 214 }
 215
 216 static struct file_operations fragmentation_file_operations = {
 217         .open           = fragmentation_open,
 218         .read           = seq_read,
 219         .llseek         = seq_lseek,
 220         .release        = seq_release,
 221 };
 222
 223 extern struct seq_operations zoneinfo_op;
 224 static int zoneinfo_open(struct inode *inode, struct file *file)
 225 {
 226         return seq_open(file, &zoneinfo_op);
 227 }
 228
 229 static struct file_operations proc_zoneinfo_file_operations = {
 230         .open           = zoneinfo_open,
 231         .read           = seq_read,
 232         .llseek         = seq_lseek,
 233         .release        = seq_release,
 234 };
 235
 236 static int version_read_proc(char *page, char **start, off_t off,
 237                                  int count, int *eof, void *data)
 238 {
 239         int len;
 240
 241         strcpy(page, linux_banner);
 242         len = strlen(page);
 243         return proc_calc_metrics(page, start, off, count, eof, len);
 244 }
 245
 246 extern struct seq_operations cpuinfo_op;
 247 static int cpuinfo_open(struct inode *inode, struct file *file)
 248 {
 249         return seq_open(file, &cpuinfo_op);
 250 }
 251
 252 static struct file_operations proc_cpuinfo_operations = {
 253         .open           = cpuinfo_open,
 254         .read           = seq_read,
 255         .llseek         = seq_lseek,
 256         .release        = seq_release,
 257 };
 258
 259 static int devinfo_show(struct seq_file *f, void *v)
 260 {
 261         int i = *(loff_t *) v;
 262
 263         if (i < CHRDEV_MAJOR_HASH_SIZE) {
 264                 if (i == 0)
 265                         seq_printf(f, "Character devices:\n");
 266                 chrdev_show(f, i);
 267         } else {
 268                 i -= CHRDEV_MAJOR_HASH_SIZE;
 269                 if (i == 0)
 270                         seq_printf(f, "\nBlock devices:\n");
 271                 blkdev_show(f, i);
 272         }
 273         return 0;
 274 }
 275
 276 static void *devinfo_start(struct seq_file *f, loff_t *pos)
 277 {
 278         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 279                 return pos;
 280         return NULL;
 281 }
 282
 283 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
 284 {
 285         (*pos)++;
 286         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 287                 return NULL;
 288         return pos;
 289 }
 290
 291 static void devinfo_stop(struct seq_file *f, void *v)
 292 {
 293         /* Nothing to do */
 294 }
 295
 296 static struct seq_operations devinfo_ops = {
 297         .start = devinfo_start,
 298         .next  = devinfo_next,
 299         .stop  = devinfo_stop,
 300         .show  = devinfo_show
 301 };
 302
 303 static int devinfo_open(struct inode *inode, struct file *filp)
 304 {
 305         return seq_open(filp, &devinfo_ops);
 306 }
 307
 308 static struct file_operations proc_devinfo_operations = {
 309         .open           = devinfo_open,
 310         .read           = seq_read,
 311         .llseek         = seq_lseek,
 312         .release        = seq_release,
 313 };
 314
 315 extern struct seq_operations vmstat_op;
 316 static int vmstat_open(struct inode *inode, struct file *file)
 317 {
 318         return seq_open(file, &vmstat_op);
 319 }
 320 static struct file_operations proc_vmstat_file_operations = {
 321         .open           = vmstat_open,
 322         .read           = seq_read,
 323         .llseek         = seq_lseek,
 324         .release        = seq_release,
 325 };
 326
 327 #ifdef CONFIG_PROC_HARDWARE
 328 static int hardware_read_proc(char *page, char **start, off_t off,
 329                                  int count, int *eof, void *data)
 330 {
 331         int len = get_hardware_list(page);
 332         return proc_calc_metrics(page, start, off, count, eof, len);
 333 }
 334 #endif
 335
 336 #ifdef CONFIG_STRAM_PROC
 337 static int stram_read_proc(char *page, char **start, off_t off,
 338                                  int count, int *eof, void *data)
 339 {
 340         int len = get_stram_list(page);
 341         return proc_calc_metrics(page, start, off, count, eof, len);
 342 }
 343 #endif
 344
 345 extern struct seq_operations partitions_op;
 346 static int partitions_open(struct inode *inode, struct file *file)
 347 {
 348         return seq_open(file, &partitions_op);
 349 }
 350 static struct file_operations proc_partitions_operations = {
 351         .open           = partitions_open,
 352         .read           = seq_read,
 353         .llseek         = seq_lseek,
 354         .release        = seq_release,
 355 };
 356
 357 extern struct seq_operations diskstats_op;
 358 static int diskstats_open(struct inode *inode, struct file *file)
 359 {
 360         return seq_open(file, &diskstats_op);
 361 }
 362 static struct file_operations proc_diskstats_operations = {
 363         .open           = diskstats_open,
 364         .read           = seq_read,
 365         .llseek         = seq_lseek,
 366         .release        = seq_release,
 367 };
 368
 369 #ifdef CONFIG_MODULES
 370 extern struct seq_operations modules_op;
 371 static int modules_open(struct inode *inode, struct file *file)
 372 {
 373         return seq_open(file, &modules_op);
 374 }
 375 static struct file_operations proc_modules_operations = {
 376         .open           = modules_open,
 377         .read           = seq_read,
 378         .llseek         = seq_lseek,
 379         .release        = seq_release,
 380 };
 381 #endif
 382
 383 #ifdef CONFIG_SLAB
 384 extern struct seq_operations slabinfo_op;
 385 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 386 static int slabinfo_open(struct inode *inode, struct file *file)
 387 {
 388         return seq_open(file, &slabinfo_op);
 389 }
 390 static struct file_operations proc_slabinfo_operations = {
 391         .open           = slabinfo_open,
 392         .read           = seq_read,
 393         .write          = slabinfo_write,
 394         .llseek         = seq_lseek,
 395         .release        = seq_release,
 396 };
 397
 398 #ifdef CONFIG_DEBUG_SLAB_LEAK
 399 extern struct seq_operations slabstats_op;
 400 static int slabstats_open(struct inode *inode, struct file *file)
 401 {
 402         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
 403         int ret = -ENOMEM;
 404         if (n) {
 405                 ret = seq_open(file, &slabstats_op);
 406                 if (!ret) {
 407                         struct seq_file *m = file->private_data;
 408                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
 409                         m->private = n;
 410                         n = NULL;
 411                 }
 412                 kfree(n);
 413         }
 414         return ret;
 415 }
 416
 417 static int slabstats_release(struct inode *inode, struct file *file)
 418 {
 419         struct seq_file *m = file->private_data;
 420         kfree(m->private);
 421         return seq_release(inode, file);
 422 }
 423
 424 static struct file_operations proc_slabstats_operations = {
 425         .open           = slabstats_open,
 426         .read           = seq_read,
 427         .llseek         = seq_lseek,
 428         .release        = slabstats_release,
 429 };
 430 #endif
 431 #endif
 432
 433 static int show_stat(struct seq_file *p, void *v)
 434 {
 435         int i;
 436         unsigned long jif;
 437         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
 438         u64 sum = 0;
 439
 440         user = nice = system = idle = iowait =
 441                 irq = softirq = steal = cputime64_zero;
 442         jif = - wall_to_monotonic.tv_sec;
 443         if (wall_to_monotonic.tv_nsec)
 444                 --jif;
 445
 446         for_each_possible_cpu(i) {
 447                 int j;
 448
 449                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
 450                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
 451                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
 452                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
 453                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
 454                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
 455                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
 456                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
 457                 for (j = 0 ; j < NR_IRQS ; j++)
 458                         sum += kstat_cpu(i).irqs[j];
 459         }
 460
 461         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",
 462                 (unsigned long long)cputime64_to_clock_t(user),
 463                 (unsigned long long)cputime64_to_clock_t(nice),
 464                 (unsigned long long)cputime64_to_clock_t(system),
 465                 (unsigned long long)cputime64_to_clock_t(idle),
 466                 (unsigned long long)cputime64_to_clock_t(iowait),
 467                 (unsigned long long)cputime64_to_clock_t(irq),
 468                 (unsigned long long)cputime64_to_clock_t(softirq),
 469                 (unsigned long long)cputime64_to_clock_t(steal));
 470         for_each_online_cpu(i) {
 471
 472                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 473                 user = kstat_cpu(i).cpustat.user;
 474                 nice = kstat_cpu(i).cpustat.nice;
 475                 system = kstat_cpu(i).cpustat.system;
 476                 idle = kstat_cpu(i).cpustat.idle;
 477                 iowait = kstat_cpu(i).cpustat.iowait;
 478                 irq = kstat_cpu(i).cpustat.irq;
 479                 softirq = kstat_cpu(i).cpustat.softirq;
 480                 steal = kstat_cpu(i).cpustat.steal;
 481                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
 482                         i,
 483                         (unsigned long long)cputime64_to_clock_t(user),
 484                         (unsigned long long)cputime64_to_clock_t(nice),
 485                         (unsigned long long)cputime64_to_clock_t(system),
 486                         (unsigned long long)cputime64_to_clock_t(idle),
 487                         (unsigned long long)cputime64_to_clock_t(iowait),
 488                         (unsigned long long)cputime64_to_clock_t(irq),
 489                         (unsigned long long)cputime64_to_clock_t(softirq),
 490                         (unsigned long long)cputime64_to_clock_t(steal));
 491         }
 492         seq_printf(p, "intr %llu", (unsigned long long)sum);
 493
 494 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
 495         for (i = 0; i < NR_IRQS; i++)
 496                 seq_printf(p, " %u", kstat_irqs(i));
 497 #endif
 498
 499         seq_printf(p,
 500                 "\nctxt %llu\n"
 501                 "btime %lu\n"
 502                 "processes %lu\n"
 503                 "procs_running %lu\n"
 504                 "procs_blocked %lu\n",
 505                 nr_context_switches(),
 506                 (unsigned long)jif,
 507                 total_forks,
 508                 nr_running(),
 509                 nr_iowait());
 510
 511         return 0;
 512 }
 513
 514 static int stat_open(struct inode *inode, struct file *file)
 515 {
 516         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 517         char *buf;
 518         struct seq_file *m;
 519         int res;
 520
 521         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 522         if (size > 128 * 1024)
 523                 size = 128 * 1024;
 524         buf = kmalloc(size, GFP_KERNEL);
 525         if (!buf)
 526                 return -ENOMEM;
 527
 528         res = single_open(file, show_stat, NULL);
 529         if (!res) {
 530                 m = file->private_data;
 531                 m->buf = buf;
 532                 m->size = size;
 533         } else
 534                 kfree(buf);
 535         return res;
 536 }
 537 static struct file_operations proc_stat_operations = {
 538         .open           = stat_open,
 539         .read           = seq_read,
 540         .llseek         = seq_lseek,
 541         .release        = single_release,
 542 };
 543
 544 /*
 545  * /proc/interrupts
 546  */
 547 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 548 {
 549         return (*pos <= NR_IRQS) ? pos : NULL;
 550 }
 551
 552 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 553 {
 554         (*pos)++;
 555         if (*pos > NR_IRQS)
 556                 return NULL;
 557         return pos;
 558 }
 559
 560 static void int_seq_stop(struct seq_file *f, void *v)
 561 {
 562         /* Nothing to do */
 563 }
 564
 565
 566 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 567 static struct seq_operations int_seq_ops = {
 568         .start = int_seq_start,
 569         .next  = int_seq_next,
 570         .stop  = int_seq_stop,
 571         .show  = show_interrupts
 572 };
 573
 574 static int interrupts_open(struct inode *inode, struct file *filp)
 575 {
 576         return seq_open(filp, &int_seq_ops);
 577 }
 578
 579 static struct file_operations proc_interrupts_operations = {
 580         .open           = interrupts_open,
 581         .read           = seq_read,
 582         .llseek         = seq_lseek,
 583         .release        = seq_release,
 584 };
 585
 586 static int filesystems_read_proc(char *page, char **start, off_t off,
 587                                  int count, int *eof, void *data)
 588 {
 589         int len = get_filesystem_list(page);
 590         return proc_calc_metrics(page, start, off, count, eof, len);
 591 }
 592
 593 static int cmdline_read_proc(char *page, char **start, off_t off,
 594                                  int count, int *eof, void *data)
 595 {
 596         int len;
 597
 598         len = sprintf(page, "%s\n", saved_command_line);
 599         return proc_calc_metrics(page, start, off, count, eof, len);
 600 }
 601
 602 static int locks_read_proc(char *page, char **start, off_t off,
 603                                  int count, int *eof, void *data)
 604 {
 605         int len = get_locks_status(page, start, off, count);
 606
 607         if (len < count)
 608                 *eof = 1;
 609         return len;
 610 }
 611
 612 static int execdomains_read_proc(char *page, char **start, off_t off,
 613                                  int count, int *eof, void *data)
 614 {
 615         int len = get_exec_domain_list(page);
 616         return proc_calc_metrics(page, start, off, count, eof, len);
 617 }
 618
 619 #ifdef CONFIG_MAGIC_SYSRQ
 620 /*
 621  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 622  */
 623 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 624                                    size_t count, loff_t *ppos)
 625 {
 626         if (count) {
 627                 char c;
 628
 629                 if (get_user(c, buf))
 630                         return -EFAULT;
 631                 __handle_sysrq(c, NULL, NULL, 0);
 632         }
 633         return count;
 634 }
 635
 636 static struct file_operations proc_sysrq_trigger_operations = {
 637         .write          = write_sysrq_trigger,
 638 };
 639 #endif
 640
 641 struct proc_dir_entry *proc_root_kcore;
 642
 643 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
 644 {
 645         struct proc_dir_entry *entry;
 646         entry = create_proc_entry(name, mode, NULL);
 647         if (entry)
 648                 entry->proc_fops = f;
 649 }
 650
 651 void __init proc_misc_init(void)
 652 {
 653         struct proc_dir_entry *entry;
 654         static struct {
 655                 char *name;
 656                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 657         } *p, simple_ones[] = {
 658                 {"loadavg",     loadavg_read_proc},
 659                 {"uptime",      uptime_read_proc},
 660                 {"meminfo",     meminfo_read_proc},
 661                 {"version",     version_read_proc},
 662 #ifdef CONFIG_PROC_HARDWARE
 663                 {"hardware",    hardware_read_proc},
 664 #endif
 665 #ifdef CONFIG_STRAM_PROC
 666                 {"stram",       stram_read_proc},
 667 #endif
 668                 {"filesystems", filesystems_read_proc},
 669                 {"cmdline",     cmdline_read_proc},
 670                 {"locks",       locks_read_proc},
 671                 {"execdomains", execdomains_read_proc},
 672                 {NULL,}
 673         };
 674         for (p = simple_ones; p->name; p++)
 675                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 676
 677         proc_symlink("mounts", NULL, "self/mounts");
 678
 679         /* And now for trickier ones */
 680         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 681         if (entry)
 682                 entry->proc_fops = &proc_kmsg_operations;
 683         create_seq_entry("devices", 0, &proc_devinfo_operations);
 684         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 685         create_seq_entry("partitions", 0, &proc_partitions_operations);
 686         create_seq_entry("stat", 0, &proc_stat_operations);
 687         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 688 #ifdef CONFIG_SLAB
 689         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 690 #ifdef CONFIG_DEBUG_SLAB_LEAK
 691         create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
 692 #endif
 693 #endif
 694         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 695         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 696         create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
 697         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 698 #ifdef CONFIG_MODULES
 699         create_seq_entry("modules", 0, &proc_modules_operations);
 700 #endif
 701 #ifdef CONFIG_SCHEDSTATS
 702         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
 703 #endif
 704 #ifdef CONFIG_PROC_KCORE
 705         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 706         if (proc_root_kcore) {
 707                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 708                 proc_root_kcore->size =
 709                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 710         }
 711 #endif
 712 #ifdef CONFIG_PROC_VMCORE
 713         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
 714         if (proc_vmcore)
 715                 proc_vmcore->proc_fops = &proc_vmcore_operations;
 716 #endif
 717 #ifdef CONFIG_MAGIC_SYSRQ
 718         entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 719         if (entry)
 720                 entry->proc_fops = &proc_sysrq_trigger_operations;
 721 #endif
 722 }