SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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/mm.h>
  30 #include <linux/mmzone.h>
  31 #include <linux/pagemap.h>
  32 #include <linux/swap.h>
  33 #include <linux/slab.h>
  34 #include <linux/smp.h>
  35 #include <linux/signal.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/smp_lock.h>
  39 #include <linux/seq_file.h>
  40 #include <linux/times.h>
  41 #include <linux/profile.h>
  42 #include <linux/blkdev.h>
  43 #include <linux/hugetlb.h>
  44 #include <linux/jiffies.h>
  45 #include <linux/sysrq.h>
  46 #include <linux/vmalloc.h>
  47 #include <linux/crash_dump.h>
  48 #include <asm/uaccess.h>
  49 #include <asm/pgtable.h>
  50 #include <asm/io.h>
  51 #include <asm/tlb.h>
  52 #include <asm/div64.h>
  53 #include "internal.h"
  54
  55 #define LOAD_INT(x) ((x) >> FSHIFT)
  56 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  57 /*
  58  * Warning: stuff below (imported functions) assumes that its output will fit
  59  * into one page. For some of those functions it may be wrong. Moreover, we
  60  * have a way to deal with that gracefully. Right now I used straightforward
  61  * wrappers, but this needs further analysis wrt potential overflows.
  62  */
  63 extern int get_hardware_list(char *);
  64 extern int get_stram_list(char *);
  65 extern int get_filesystem_list(char *);
  66 extern int get_exec_domain_list(char *);
  67 extern int get_dma_list(char *);
  68 extern int get_locks_status (char *, char **, off_t, int);
  69
  70 static int proc_calc_metrics(char *page, char **start, off_t off,
  71                                  int count, int *eof, int len)
  72 {
  73         if (len <= off+count) *eof = 1;
  74         *start = page + off;
  75         len -= off;
  76         if (len>count) len = count;
  77         if (len<0) len = 0;
  78         return len;
  79 }
  80
  81 static int loadavg_read_proc(char *page, char **start, off_t off,
  82                                  int count, int *eof, void *data)
  83 {
  84         int a, b, c;
  85         int len;
  86
  87         a = avenrun[0] + (FIXED_1/200);
  88         b = avenrun[1] + (FIXED_1/200);
  89         c = avenrun[2] + (FIXED_1/200);
  90         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
  91                 LOAD_INT(a), LOAD_FRAC(a),
  92                 LOAD_INT(b), LOAD_FRAC(b),
  93                 LOAD_INT(c), LOAD_FRAC(c),
  94                 nr_running(), nr_threads, last_pid);
  95         return proc_calc_metrics(page, start, off, count, eof, len);
  96 }
  97
  98 static int uptime_read_proc(char *page, char **start, off_t off,
  99                                  int count, int *eof, void *data)
 100 {
 101         struct timespec uptime;
 102         struct timespec idle;
 103         int len;
 104         cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
 105
 106         do_posix_clock_monotonic_gettime(&uptime);
 107         cputime_to_timespec(idletime, &idle);
 108         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 109                         (unsigned long) uptime.tv_sec,
 110                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
 111                         (unsigned long) idle.tv_sec,
 112                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
 113
 114         return proc_calc_metrics(page, start, off, count, eof, len);
 115 }
 116
 117 static int meminfo_read_proc(char *page, char **start, off_t off,
 118                                  int count, int *eof, void *data)
 119 {
 120         struct sysinfo i;
 121         int len;
 122         unsigned long inactive;
 123         unsigned long active;
 124         unsigned long free;
 125         unsigned long committed;
 126         unsigned long allowed;
 127         struct vmalloc_info vmi;
 128         long cached;
 129
 130         get_zone_counts(&active, &inactive, &free);
 131
 132 /*
 133  * display in kilobytes.
 134  */
 135 #define K(x) ((x) << (PAGE_SHIFT - 10))
 136         si_meminfo(&i);
 137         si_swapinfo(&i);
 138         committed = atomic_read(&vm_committed_space);
 139         allowed = ((totalram_pages - hugetlb_total_pages())
 140                 * sysctl_overcommit_ratio / 100) + total_swap_pages;
 141
 142         cached = global_page_state(NR_FILE_PAGES) -
 143                         total_swapcache_pages - i.bufferram;
 144         if (cached < 0)
 145                 cached = 0;
 146
 147         get_vmalloc_info(&vmi);
 148
 149         /*
 150          * Tagged format, for easy grepping and expansion.
 151          */
 152         len = sprintf(page,
 153                 "MemTotal:     %8lu kB\n"
 154                 "MemFree:      %8lu kB\n"
 155                 "Buffers:      %8lu kB\n"
 156                 "Cached:       %8lu kB\n"
 157                 "SwapCached:   %8lu kB\n"
 158                 "Active:       %8lu kB\n"
 159                 "Inactive:     %8lu kB\n"
 160 #ifdef CONFIG_HIGHMEM
 161                 "HighTotal:    %8lu kB\n"
 162                 "HighFree:     %8lu kB\n"
 163                 "LowTotal:     %8lu kB\n"
 164                 "LowFree:      %8lu kB\n"
 165 #endif
 166                 "SwapTotal:    %8lu kB\n"
 167                 "SwapFree:     %8lu kB\n"
 168                 "Dirty:        %8lu kB\n"
 169                 "Writeback:    %8lu kB\n"
 170                 "AnonPages:    %8lu kB\n"
 171                 "Mapped:       %8lu kB\n"
 172                 "Slab:         %8lu kB\n"
 173                 "PageTables:   %8lu kB\n"
 174                 "NFS_Unstable: %8lu kB\n"
 175                 "Bounce:       %8lu kB\n"
 176                 "CommitLimit:  %8lu kB\n"
 177                 "Committed_AS: %8lu kB\n"
 178                 "VmallocTotal: %8lu kB\n"
 179                 "VmallocUsed:  %8lu kB\n"
 180                 "VmallocChunk: %8lu kB\n",
 181                 K(i.totalram),
 182                 K(i.freeram),
 183                 K(i.bufferram),
 184                 K(cached),
 185                 K(total_swapcache_pages),
 186                 K(active),
 187                 K(inactive),
 188 #ifdef CONFIG_HIGHMEM
 189                 K(i.totalhigh),
 190                 K(i.freehigh),
 191                 K(i.totalram-i.totalhigh),
 192                 K(i.freeram-i.freehigh),
 193 #endif
 194                 K(i.totalswap),
 195                 K(i.freeswap),
 196                 K(global_page_state(NR_FILE_DIRTY)),
 197                 K(global_page_state(NR_WRITEBACK)),
 198                 K(global_page_state(NR_ANON_PAGES)),
 199                 K(global_page_state(NR_FILE_MAPPED)),
 200                 K(global_page_state(NR_SLAB)),
 201                 K(global_page_state(NR_PAGETABLE)),
 202                 K(global_page_state(NR_UNSTABLE_NFS)),
 203                 K(global_page_state(NR_BOUNCE)),
 204                 K(allowed),
 205                 K(committed),
 206                 (unsigned long)VMALLOC_TOTAL >> 10,
 207                 vmi.used >> 10,
 208                 vmi.largest_chunk >> 10
 209                 );
 210
 211                 len += hugetlb_report_meminfo(page + len);
 212
 213         return proc_calc_metrics(page, start, off, count, eof, len);
 214 #undef K
 215 }
 216
 217 extern struct seq_operations fragmentation_op;
 218 static int fragmentation_open(struct inode *inode, struct file *file)
 219 {
 220         (void)inode;
 221         return seq_open(file, &fragmentation_op);
 222 }
 223
 224 static struct file_operations fragmentation_file_operations = {
 225         .open           = fragmentation_open,
 226         .read           = seq_read,
 227         .llseek         = seq_lseek,
 228         .release        = seq_release,
 229 };
 230
 231 extern struct seq_operations zoneinfo_op;
 232 static int zoneinfo_open(struct inode *inode, struct file *file)
 233 {
 234         return seq_open(file, &zoneinfo_op);
 235 }
 236
 237 static struct file_operations proc_zoneinfo_file_operations = {
 238         .open           = zoneinfo_open,
 239         .read           = seq_read,
 240         .llseek         = seq_lseek,
 241         .release        = seq_release,
 242 };
 243
 244 static int version_read_proc(char *page, char **start, off_t off,
 245                                  int count, int *eof, void *data)
 246 {
 247         int len;
 248
 249         strcpy(page, linux_banner);
 250         len = strlen(page);
 251         return proc_calc_metrics(page, start, off, count, eof, len);
 252 }
 253
 254 extern struct seq_operations cpuinfo_op;
 255 static int cpuinfo_open(struct inode *inode, struct file *file)
 256 {
 257         return seq_open(file, &cpuinfo_op);
 258 }
 259
 260 static struct file_operations proc_cpuinfo_operations = {
 261         .open           = cpuinfo_open,
 262         .read           = seq_read,
 263         .llseek         = seq_lseek,
 264         .release        = seq_release,
 265 };
 266
 267 static int devinfo_show(struct seq_file *f, void *v)
 268 {
 269         int i = *(loff_t *) v;
 270
 271         if (i < CHRDEV_MAJOR_HASH_SIZE) {
 272                 if (i == 0)
 273                         seq_printf(f, "Character devices:\n");
 274                 chrdev_show(f, i);
 275         } else {
 276                 i -= CHRDEV_MAJOR_HASH_SIZE;
 277                 if (i == 0)
 278                         seq_printf(f, "\nBlock devices:\n");
 279                 blkdev_show(f, i);
 280         }
 281         return 0;
 282 }
 283
 284 static void *devinfo_start(struct seq_file *f, loff_t *pos)
 285 {
 286         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 287                 return pos;
 288         return NULL;
 289 }
 290
 291 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
 292 {
 293         (*pos)++;
 294         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 295                 return NULL;
 296         return pos;
 297 }
 298
 299 static void devinfo_stop(struct seq_file *f, void *v)
 300 {
 301         /* Nothing to do */
 302 }
 303
 304 static struct seq_operations devinfo_ops = {
 305         .start = devinfo_start,
 306         .next  = devinfo_next,
 307         .stop  = devinfo_stop,
 308         .show  = devinfo_show
 309 };
 310
 311 static int devinfo_open(struct inode *inode, struct file *filp)
 312 {
 313         return seq_open(filp, &devinfo_ops);
 314 }
 315
 316 static struct file_operations proc_devinfo_operations = {
 317         .open           = devinfo_open,
 318         .read           = seq_read,
 319         .llseek         = seq_lseek,
 320         .release        = seq_release,
 321 };
 322
 323 extern struct seq_operations vmstat_op;
 324 static int vmstat_open(struct inode *inode, struct file *file)
 325 {
 326         return seq_open(file, &vmstat_op);
 327 }
 328 static struct file_operations proc_vmstat_file_operations = {
 329         .open           = vmstat_open,
 330         .read           = seq_read,
 331         .llseek         = seq_lseek,
 332         .release        = seq_release,
 333 };
 334
 335 #ifdef CONFIG_PROC_HARDWARE
 336 static int hardware_read_proc(char *page, char **start, off_t off,
 337                                  int count, int *eof, void *data)
 338 {
 339         int len = get_hardware_list(page);
 340         return proc_calc_metrics(page, start, off, count, eof, len);
 341 }
 342 #endif
 343
 344 #ifdef CONFIG_STRAM_PROC
 345 static int stram_read_proc(char *page, char **start, off_t off,
 346                                  int count, int *eof, void *data)
 347 {
 348         int len = get_stram_list(page);
 349         return proc_calc_metrics(page, start, off, count, eof, len);
 350 }
 351 #endif
 352
 353 extern struct seq_operations partitions_op;
 354 static int partitions_open(struct inode *inode, struct file *file)
 355 {
 356         return seq_open(file, &partitions_op);
 357 }
 358 static struct file_operations proc_partitions_operations = {
 359         .open           = partitions_open,
 360         .read           = seq_read,
 361         .llseek         = seq_lseek,
 362         .release        = seq_release,
 363 };
 364
 365 extern struct seq_operations diskstats_op;
 366 static int diskstats_open(struct inode *inode, struct file *file)
 367 {
 368         return seq_open(file, &diskstats_op);
 369 }
 370 static struct file_operations proc_diskstats_operations = {
 371         .open           = diskstats_open,
 372         .read           = seq_read,
 373         .llseek         = seq_lseek,
 374         .release        = seq_release,
 375 };
 376
 377 #ifdef CONFIG_MODULES
 378 extern struct seq_operations modules_op;
 379 static int modules_open(struct inode *inode, struct file *file)
 380 {
 381         return seq_open(file, &modules_op);
 382 }
 383 static struct file_operations proc_modules_operations = {
 384         .open           = modules_open,
 385         .read           = seq_read,
 386         .llseek         = seq_lseek,
 387         .release        = seq_release,
 388 };
 389 #endif
 390
 391 #ifdef CONFIG_SLAB
 392 extern struct seq_operations slabinfo_op;
 393 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 394 static int slabinfo_open(struct inode *inode, struct file *file)
 395 {
 396         return seq_open(file, &slabinfo_op);
 397 }
 398 static struct file_operations proc_slabinfo_operations = {
 399         .open           = slabinfo_open,
 400         .read           = seq_read,
 401         .write          = slabinfo_write,
 402         .llseek         = seq_lseek,
 403         .release        = seq_release,
 404 };
 405
 406 #ifdef CONFIG_DEBUG_SLAB_LEAK
 407 extern struct seq_operations slabstats_op;
 408 static int slabstats_open(struct inode *inode, struct file *file)
 409 {
 410         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
 411         int ret = -ENOMEM;
 412         if (n) {
 413                 ret = seq_open(file, &slabstats_op);
 414                 if (!ret) {
 415                         struct seq_file *m = file->private_data;
 416                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
 417                         m->private = n;
 418                         n = NULL;
 419                 }
 420                 kfree(n);
 421         }
 422         return ret;
 423 }
 424
 425 static int slabstats_release(struct inode *inode, struct file *file)
 426 {
 427         struct seq_file *m = file->private_data;
 428         kfree(m->private);
 429         return seq_release(inode, file);
 430 }
 431
 432 static struct file_operations proc_slabstats_operations = {
 433         .open           = slabstats_open,
 434         .read           = seq_read,
 435         .llseek         = seq_lseek,
 436         .release        = slabstats_release,
 437 };
 438 #endif
 439 #endif
 440
 441 static int show_stat(struct seq_file *p, void *v)
 442 {
 443         int i;
 444         unsigned long jif;
 445         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
 446         u64 sum = 0;
 447
 448         user = nice = system = idle = iowait =
 449                 irq = softirq = steal = cputime64_zero;
 450         jif = - wall_to_monotonic.tv_sec;
 451         if (wall_to_monotonic.tv_nsec)
 452                 --jif;
 453
 454         for_each_possible_cpu(i) {
 455                 int j;
 456
 457                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
 458                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
 459                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
 460                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
 461                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
 462                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
 463                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
 464                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
 465                 for (j = 0 ; j < NR_IRQS ; j++)
 466                         sum += kstat_cpu(i).irqs[j];
 467         }
 468
 469         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",
 470                 (unsigned long long)cputime64_to_clock_t(user),
 471                 (unsigned long long)cputime64_to_clock_t(nice),
 472                 (unsigned long long)cputime64_to_clock_t(system),
 473                 (unsigned long long)cputime64_to_clock_t(idle),
 474                 (unsigned long long)cputime64_to_clock_t(iowait),
 475                 (unsigned long long)cputime64_to_clock_t(irq),
 476                 (unsigned long long)cputime64_to_clock_t(softirq),
 477                 (unsigned long long)cputime64_to_clock_t(steal));
 478         for_each_online_cpu(i) {
 479
 480                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 481                 user = kstat_cpu(i).cpustat.user;
 482                 nice = kstat_cpu(i).cpustat.nice;
 483                 system = kstat_cpu(i).cpustat.system;
 484                 idle = kstat_cpu(i).cpustat.idle;
 485                 iowait = kstat_cpu(i).cpustat.iowait;
 486                 irq = kstat_cpu(i).cpustat.irq;
 487                 softirq = kstat_cpu(i).cpustat.softirq;
 488                 steal = kstat_cpu(i).cpustat.steal;
 489                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
 490                         i,
 491                         (unsigned long long)cputime64_to_clock_t(user),
 492                         (unsigned long long)cputime64_to_clock_t(nice),
 493                         (unsigned long long)cputime64_to_clock_t(system),
 494                         (unsigned long long)cputime64_to_clock_t(idle),
 495                         (unsigned long long)cputime64_to_clock_t(iowait),
 496                         (unsigned long long)cputime64_to_clock_t(irq),
 497                         (unsigned long long)cputime64_to_clock_t(softirq),
 498                         (unsigned long long)cputime64_to_clock_t(steal));
 499         }
 500         seq_printf(p, "intr %llu", (unsigned long long)sum);
 501
 502 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
 503         for (i = 0; i < NR_IRQS; i++)
 504                 seq_printf(p, " %u", kstat_irqs(i));
 505 #endif
 506
 507         seq_printf(p,
 508                 "\nctxt %llu\n"
 509                 "btime %lu\n"
 510                 "processes %lu\n"
 511                 "procs_running %lu\n"
 512                 "procs_blocked %lu\n",
 513                 nr_context_switches(),
 514                 (unsigned long)jif,
 515                 total_forks,
 516                 nr_running(),
 517                 nr_iowait());
 518
 519         return 0;
 520 }
 521
 522 static int stat_open(struct inode *inode, struct file *file)
 523 {
 524         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 525         char *buf;
 526         struct seq_file *m;
 527         int res;
 528
 529         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 530         if (size > 128 * 1024)
 531                 size = 128 * 1024;
 532         buf = kmalloc(size, GFP_KERNEL);
 533         if (!buf)
 534                 return -ENOMEM;
 535
 536         res = single_open(file, show_stat, NULL);
 537         if (!res) {
 538                 m = file->private_data;
 539                 m->buf = buf;
 540                 m->size = size;
 541         } else
 542                 kfree(buf);
 543         return res;
 544 }
 545 static struct file_operations proc_stat_operations = {
 546         .open           = stat_open,
 547         .read           = seq_read,
 548         .llseek         = seq_lseek,
 549         .release        = single_release,
 550 };
 551
 552 /*
 553  * /proc/interrupts
 554  */
 555 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 556 {
 557         return (*pos <= NR_IRQS) ? pos : NULL;
 558 }
 559
 560 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 561 {
 562         (*pos)++;
 563         if (*pos > NR_IRQS)
 564                 return NULL;
 565         return pos;
 566 }
 567
 568 static void int_seq_stop(struct seq_file *f, void *v)
 569 {
 570         /* Nothing to do */
 571 }
 572
 573
 574 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 575 static struct seq_operations int_seq_ops = {
 576         .start = int_seq_start,
 577         .next  = int_seq_next,
 578         .stop  = int_seq_stop,
 579         .show  = show_interrupts
 580 };
 581
 582 static int interrupts_open(struct inode *inode, struct file *filp)
 583 {
 584         return seq_open(filp, &int_seq_ops);
 585 }
 586
 587 static struct file_operations proc_interrupts_operations = {
 588         .open           = interrupts_open,
 589         .read           = seq_read,
 590         .llseek         = seq_lseek,
 591         .release        = seq_release,
 592 };
 593
 594 static int filesystems_read_proc(char *page, char **start, off_t off,
 595                                  int count, int *eof, void *data)
 596 {
 597         int len = get_filesystem_list(page);
 598         return proc_calc_metrics(page, start, off, count, eof, len);
 599 }
 600
 601 static int cmdline_read_proc(char *page, char **start, off_t off,
 602                                  int count, int *eof, void *data)
 603 {
 604         int len;
 605
 606         len = sprintf(page, "%s\n", saved_command_line);
 607         return proc_calc_metrics(page, start, off, count, eof, len);
 608 }
 609
 610 static int locks_read_proc(char *page, char **start, off_t off,
 611                                  int count, int *eof, void *data)
 612 {
 613         int len = get_locks_status(page, start, off, count);
 614
 615         if (len < count)
 616                 *eof = 1;
 617         return len;
 618 }
 619
 620 static int execdomains_read_proc(char *page, char **start, off_t off,
 621                                  int count, int *eof, void *data)
 622 {
 623         int len = get_exec_domain_list(page);
 624         return proc_calc_metrics(page, start, off, count, eof, len);
 625 }
 626
 627 #ifdef CONFIG_MAGIC_SYSRQ
 628 /*
 629  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 630  */
 631 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 632                                    size_t count, loff_t *ppos)
 633 {
 634         if (count) {
 635                 char c;
 636
 637                 if (get_user(c, buf))
 638                         return -EFAULT;
 639                 __handle_sysrq(c, NULL, NULL, 0);
 640         }
 641         return count;
 642 }
 643
 644 static struct file_operations proc_sysrq_trigger_operations = {
 645         .write          = write_sysrq_trigger,
 646 };
 647 #endif
 648
 649 struct proc_dir_entry *proc_root_kcore;
 650
 651 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
 652 {
 653         struct proc_dir_entry *entry;
 654         entry = create_proc_entry(name, mode, NULL);
 655         if (entry)
 656                 entry->proc_fops = f;
 657 }
 658
 659 void __init proc_misc_init(void)
 660 {
 661         struct proc_dir_entry *entry;
 662         static struct {
 663                 char *name;
 664                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 665         } *p, simple_ones[] = {
 666                 {"loadavg",     loadavg_read_proc},
 667                 {"uptime",      uptime_read_proc},
 668                 {"meminfo",     meminfo_read_proc},
 669                 {"version",     version_read_proc},
 670 #ifdef CONFIG_PROC_HARDWARE
 671                 {"hardware",    hardware_read_proc},
 672 #endif
 673 #ifdef CONFIG_STRAM_PROC
 674                 {"stram",       stram_read_proc},
 675 #endif
 676                 {"filesystems", filesystems_read_proc},
 677                 {"cmdline",     cmdline_read_proc},
 678                 {"locks",       locks_read_proc},
 679                 {"execdomains", execdomains_read_proc},
 680                 {NULL,}
 681         };
 682         for (p = simple_ones; p->name; p++)
 683                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 684
 685         proc_symlink("mounts", NULL, "self/mounts");
 686
 687         /* And now for trickier ones */
 688         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 689         if (entry)
 690                 entry->proc_fops = &proc_kmsg_operations;
 691         create_seq_entry("devices", 0, &proc_devinfo_operations);
 692         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 693         create_seq_entry("partitions", 0, &proc_partitions_operations);
 694         create_seq_entry("stat", 0, &proc_stat_operations);
 695         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 696 #ifdef CONFIG_SLAB
 697         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 698 #ifdef CONFIG_DEBUG_SLAB_LEAK
 699         create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
 700 #endif
 701 #endif
 702         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 703         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 704         create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
 705         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 706 #ifdef CONFIG_MODULES
 707         create_seq_entry("modules", 0, &proc_modules_operations);
 708 #endif
 709 #ifdef CONFIG_SCHEDSTATS
 710         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
 711 #endif
 712 #ifdef CONFIG_PROC_KCORE
 713         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 714         if (proc_root_kcore) {
 715                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 716                 proc_root_kcore->size =
 717                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 718         }
 719 #endif
 720 #ifdef CONFIG_PROC_VMCORE
 721         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
 722         if (proc_vmcore)
 723                 proc_vmcore->proc_fops = &proc_vmcore_operations;
 724 #endif
 725 #ifdef CONFIG_MAGIC_SYSRQ
 726         entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 727         if (entry)
 728                 entry->proc_fops = &proc_sysrq_trigger_operations;
 729 #endif
 730 }