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                 "HighTotal:    %8lu kB\n"
 161                 "HighFree:     %8lu kB\n"
 162                 "LowTotal:     %8lu kB\n"
 163                 "LowFree:      %8lu kB\n"
 164                 "SwapTotal:    %8lu kB\n"
 165                 "SwapFree:     %8lu kB\n"
 166                 "Dirty:        %8lu kB\n"
 167                 "Writeback:    %8lu kB\n"
 168                 "AnonPages:    %8lu kB\n"
 169                 "Mapped:       %8lu kB\n"
 170                 "Slab:         %8lu kB\n"
 171                 "PageTables:   %8lu kB\n"
 172                 "NFS_Unstable: %8lu kB\n"
 173                 "Bounce:       %8lu kB\n"
 174                 "CommitLimit:  %8lu kB\n"
 175                 "Committed_AS: %8lu kB\n"
 176                 "VmallocTotal: %8lu kB\n"
 177                 "VmallocUsed:  %8lu kB\n"
 178                 "VmallocChunk: %8lu kB\n",
 179                 K(i.totalram),
 180                 K(i.freeram),
 181                 K(i.bufferram),
 182                 K(cached),
 183                 K(total_swapcache_pages),
 184                 K(active),
 185                 K(inactive),
 186                 K(i.totalhigh),
 187                 K(i.freehigh),
 188                 K(i.totalram-i.totalhigh),
 189                 K(i.freeram-i.freehigh),
 190                 K(i.totalswap),
 191                 K(i.freeswap),
 192                 K(global_page_state(NR_FILE_DIRTY)),
 193                 K(global_page_state(NR_WRITEBACK)),
 194                 K(global_page_state(NR_ANON_PAGES)),
 195                 K(global_page_state(NR_FILE_MAPPED)),
 196                 K(global_page_state(NR_SLAB)),
 197                 K(global_page_state(NR_PAGETABLE)),
 198                 K(global_page_state(NR_UNSTABLE_NFS)),
 199                 K(global_page_state(NR_BOUNCE)),
 200                 K(allowed),
 201                 K(committed),
 202                 (unsigned long)VMALLOC_TOTAL >> 10,
 203                 vmi.used >> 10,
 204                 vmi.largest_chunk >> 10
 205                 );
 206
 207                 len += hugetlb_report_meminfo(page + len);
 208
 209         return proc_calc_metrics(page, start, off, count, eof, len);
 210 #undef K
 211 }
 212
 213 extern struct seq_operations fragmentation_op;
 214 static int fragmentation_open(struct inode *inode, struct file *file)
 215 {
 216         (void)inode;
 217         return seq_open(file, &fragmentation_op);
 218 }
 219
 220 static struct file_operations fragmentation_file_operations = {
 221         .open           = fragmentation_open,
 222         .read           = seq_read,
 223         .llseek         = seq_lseek,
 224         .release        = seq_release,
 225 };
 226
 227 extern struct seq_operations zoneinfo_op;
 228 static int zoneinfo_open(struct inode *inode, struct file *file)
 229 {
 230         return seq_open(file, &zoneinfo_op);
 231 }
 232
 233 static struct file_operations proc_zoneinfo_file_operations = {
 234         .open           = zoneinfo_open,
 235         .read           = seq_read,
 236         .llseek         = seq_lseek,
 237         .release        = seq_release,
 238 };
 239
 240 static int version_read_proc(char *page, char **start, off_t off,
 241                                  int count, int *eof, void *data)
 242 {
 243         int len;
 244
 245         strcpy(page, linux_banner);
 246         len = strlen(page);
 247         return proc_calc_metrics(page, start, off, count, eof, len);
 248 }
 249
 250 extern struct seq_operations cpuinfo_op;
 251 static int cpuinfo_open(struct inode *inode, struct file *file)
 252 {
 253         return seq_open(file, &cpuinfo_op);
 254 }
 255
 256 static struct file_operations proc_cpuinfo_operations = {
 257         .open           = cpuinfo_open,
 258         .read           = seq_read,
 259         .llseek         = seq_lseek,
 260         .release        = seq_release,
 261 };
 262
 263 static int devinfo_show(struct seq_file *f, void *v)
 264 {
 265         int i = *(loff_t *) v;
 266
 267         if (i < CHRDEV_MAJOR_HASH_SIZE) {
 268                 if (i == 0)
 269                         seq_printf(f, "Character devices:\n");
 270                 chrdev_show(f, i);
 271         } else {
 272                 i -= CHRDEV_MAJOR_HASH_SIZE;
 273                 if (i == 0)
 274                         seq_printf(f, "\nBlock devices:\n");
 275                 blkdev_show(f, i);
 276         }
 277         return 0;
 278 }
 279
 280 static void *devinfo_start(struct seq_file *f, loff_t *pos)
 281 {
 282         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 283                 return pos;
 284         return NULL;
 285 }
 286
 287 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
 288 {
 289         (*pos)++;
 290         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 291                 return NULL;
 292         return pos;
 293 }
 294
 295 static void devinfo_stop(struct seq_file *f, void *v)
 296 {
 297         /* Nothing to do */
 298 }
 299
 300 static struct seq_operations devinfo_ops = {
 301         .start = devinfo_start,
 302         .next  = devinfo_next,
 303         .stop  = devinfo_stop,
 304         .show  = devinfo_show
 305 };
 306
 307 static int devinfo_open(struct inode *inode, struct file *filp)
 308 {
 309         return seq_open(filp, &devinfo_ops);
 310 }
 311
 312 static struct file_operations proc_devinfo_operations = {
 313         .open           = devinfo_open,
 314         .read           = seq_read,
 315         .llseek         = seq_lseek,
 316         .release        = seq_release,
 317 };
 318
 319 extern struct seq_operations vmstat_op;
 320 static int vmstat_open(struct inode *inode, struct file *file)
 321 {
 322         return seq_open(file, &vmstat_op);
 323 }
 324 static struct file_operations proc_vmstat_file_operations = {
 325         .open           = vmstat_open,
 326         .read           = seq_read,
 327         .llseek         = seq_lseek,
 328         .release        = seq_release,
 329 };
 330
 331 #ifdef CONFIG_PROC_HARDWARE
 332 static int hardware_read_proc(char *page, char **start, off_t off,
 333                                  int count, int *eof, void *data)
 334 {
 335         int len = get_hardware_list(page);
 336         return proc_calc_metrics(page, start, off, count, eof, len);
 337 }
 338 #endif
 339
 340 #ifdef CONFIG_STRAM_PROC
 341 static int stram_read_proc(char *page, char **start, off_t off,
 342                                  int count, int *eof, void *data)
 343 {
 344         int len = get_stram_list(page);
 345         return proc_calc_metrics(page, start, off, count, eof, len);
 346 }
 347 #endif
 348
 349 extern struct seq_operations partitions_op;
 350 static int partitions_open(struct inode *inode, struct file *file)
 351 {
 352         return seq_open(file, &partitions_op);
 353 }
 354 static struct file_operations proc_partitions_operations = {
 355         .open           = partitions_open,
 356         .read           = seq_read,
 357         .llseek         = seq_lseek,
 358         .release        = seq_release,
 359 };
 360
 361 extern struct seq_operations diskstats_op;
 362 static int diskstats_open(struct inode *inode, struct file *file)
 363 {
 364         return seq_open(file, &diskstats_op);
 365 }
 366 static struct file_operations proc_diskstats_operations = {
 367         .open           = diskstats_open,
 368         .read           = seq_read,
 369         .llseek         = seq_lseek,
 370         .release        = seq_release,
 371 };
 372
 373 #ifdef CONFIG_MODULES
 374 extern struct seq_operations modules_op;
 375 static int modules_open(struct inode *inode, struct file *file)
 376 {
 377         return seq_open(file, &modules_op);
 378 }
 379 static struct file_operations proc_modules_operations = {
 380         .open           = modules_open,
 381         .read           = seq_read,
 382         .llseek         = seq_lseek,
 383         .release        = seq_release,
 384 };
 385 #endif
 386
 387 #ifdef CONFIG_SLAB
 388 extern struct seq_operations slabinfo_op;
 389 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 390 static int slabinfo_open(struct inode *inode, struct file *file)
 391 {
 392         return seq_open(file, &slabinfo_op);
 393 }
 394 static struct file_operations proc_slabinfo_operations = {
 395         .open           = slabinfo_open,
 396         .read           = seq_read,
 397         .write          = slabinfo_write,
 398         .llseek         = seq_lseek,
 399         .release        = seq_release,
 400 };
 401
 402 #ifdef CONFIG_DEBUG_SLAB_LEAK
 403 extern struct seq_operations slabstats_op;
 404 static int slabstats_open(struct inode *inode, struct file *file)
 405 {
 406         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
 407         int ret = -ENOMEM;
 408         if (n) {
 409                 ret = seq_open(file, &slabstats_op);
 410                 if (!ret) {
 411                         struct seq_file *m = file->private_data;
 412                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
 413                         m->private = n;
 414                         n = NULL;
 415                 }
 416                 kfree(n);
 417         }
 418         return ret;
 419 }
 420
 421 static int slabstats_release(struct inode *inode, struct file *file)
 422 {
 423         struct seq_file *m = file->private_data;
 424         kfree(m->private);
 425         return seq_release(inode, file);
 426 }
 427
 428 static struct file_operations proc_slabstats_operations = {
 429         .open           = slabstats_open,
 430         .read           = seq_read,
 431         .llseek         = seq_lseek,
 432         .release        = slabstats_release,
 433 };
 434 #endif
 435 #endif
 436
 437 static int show_stat(struct seq_file *p, void *v)
 438 {
 439         int i;
 440         unsigned long jif;
 441         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
 442         u64 sum = 0;
 443
 444         user = nice = system = idle = iowait =
 445                 irq = softirq = steal = cputime64_zero;
 446         jif = - wall_to_monotonic.tv_sec;
 447         if (wall_to_monotonic.tv_nsec)
 448                 --jif;
 449
 450         for_each_possible_cpu(i) {
 451                 int j;
 452
 453                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
 454                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
 455                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
 456                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
 457                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
 458                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
 459                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
 460                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
 461                 for (j = 0 ; j < NR_IRQS ; j++)
 462                         sum += kstat_cpu(i).irqs[j];
 463         }
 464
 465         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",
 466                 (unsigned long long)cputime64_to_clock_t(user),
 467                 (unsigned long long)cputime64_to_clock_t(nice),
 468                 (unsigned long long)cputime64_to_clock_t(system),
 469                 (unsigned long long)cputime64_to_clock_t(idle),
 470                 (unsigned long long)cputime64_to_clock_t(iowait),
 471                 (unsigned long long)cputime64_to_clock_t(irq),
 472                 (unsigned long long)cputime64_to_clock_t(softirq),
 473                 (unsigned long long)cputime64_to_clock_t(steal));
 474         for_each_online_cpu(i) {
 475
 476                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 477                 user = kstat_cpu(i).cpustat.user;
 478                 nice = kstat_cpu(i).cpustat.nice;
 479                 system = kstat_cpu(i).cpustat.system;
 480                 idle = kstat_cpu(i).cpustat.idle;
 481                 iowait = kstat_cpu(i).cpustat.iowait;
 482                 irq = kstat_cpu(i).cpustat.irq;
 483                 softirq = kstat_cpu(i).cpustat.softirq;
 484                 steal = kstat_cpu(i).cpustat.steal;
 485                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
 486                         i,
 487                         (unsigned long long)cputime64_to_clock_t(user),
 488                         (unsigned long long)cputime64_to_clock_t(nice),
 489                         (unsigned long long)cputime64_to_clock_t(system),
 490                         (unsigned long long)cputime64_to_clock_t(idle),
 491                         (unsigned long long)cputime64_to_clock_t(iowait),
 492                         (unsigned long long)cputime64_to_clock_t(irq),
 493                         (unsigned long long)cputime64_to_clock_t(softirq),
 494                         (unsigned long long)cputime64_to_clock_t(steal));
 495         }
 496         seq_printf(p, "intr %llu", (unsigned long long)sum);
 497
 498 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
 499         for (i = 0; i < NR_IRQS; i++)
 500                 seq_printf(p, " %u", kstat_irqs(i));
 501 #endif
 502
 503         seq_printf(p,
 504                 "\nctxt %llu\n"
 505                 "btime %lu\n"
 506                 "processes %lu\n"
 507                 "procs_running %lu\n"
 508                 "procs_blocked %lu\n",
 509                 nr_context_switches(),
 510                 (unsigned long)jif,
 511                 total_forks,
 512                 nr_running(),
 513                 nr_iowait());
 514
 515         return 0;
 516 }
 517
 518 static int stat_open(struct inode *inode, struct file *file)
 519 {
 520         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 521         char *buf;
 522         struct seq_file *m;
 523         int res;
 524
 525         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 526         if (size > 128 * 1024)
 527                 size = 128 * 1024;
 528         buf = kmalloc(size, GFP_KERNEL);
 529         if (!buf)
 530                 return -ENOMEM;
 531
 532         res = single_open(file, show_stat, NULL);
 533         if (!res) {
 534                 m = file->private_data;
 535                 m->buf = buf;
 536                 m->size = size;
 537         } else
 538                 kfree(buf);
 539         return res;
 540 }
 541 static struct file_operations proc_stat_operations = {
 542         .open           = stat_open,
 543         .read           = seq_read,
 544         .llseek         = seq_lseek,
 545         .release        = single_release,
 546 };
 547
 548 /*
 549  * /proc/interrupts
 550  */
 551 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 552 {
 553         return (*pos <= NR_IRQS) ? pos : NULL;
 554 }
 555
 556 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 557 {
 558         (*pos)++;
 559         if (*pos > NR_IRQS)
 560                 return NULL;
 561         return pos;
 562 }
 563
 564 static void int_seq_stop(struct seq_file *f, void *v)
 565 {
 566         /* Nothing to do */
 567 }
 568
 569
 570 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 571 static struct seq_operations int_seq_ops = {
 572         .start = int_seq_start,
 573         .next  = int_seq_next,
 574         .stop  = int_seq_stop,
 575         .show  = show_interrupts
 576 };
 577
 578 static int interrupts_open(struct inode *inode, struct file *filp)
 579 {
 580         return seq_open(filp, &int_seq_ops);
 581 }
 582
 583 static struct file_operations proc_interrupts_operations = {
 584         .open           = interrupts_open,
 585         .read           = seq_read,
 586         .llseek         = seq_lseek,
 587         .release        = seq_release,
 588 };
 589
 590 static int filesystems_read_proc(char *page, char **start, off_t off,
 591                                  int count, int *eof, void *data)
 592 {
 593         int len = get_filesystem_list(page);
 594         return proc_calc_metrics(page, start, off, count, eof, len);
 595 }
 596
 597 static int cmdline_read_proc(char *page, char **start, off_t off,
 598                                  int count, int *eof, void *data)
 599 {
 600         int len;
 601
 602         len = sprintf(page, "%s\n", saved_command_line);
 603         return proc_calc_metrics(page, start, off, count, eof, len);
 604 }
 605
 606 static int locks_read_proc(char *page, char **start, off_t off,
 607                                  int count, int *eof, void *data)
 608 {
 609         int len = get_locks_status(page, start, off, count);
 610
 611         if (len < count)
 612                 *eof = 1;
 613         return len;
 614 }
 615
 616 static int execdomains_read_proc(char *page, char **start, off_t off,
 617                                  int count, int *eof, void *data)
 618 {
 619         int len = get_exec_domain_list(page);
 620         return proc_calc_metrics(page, start, off, count, eof, len);
 621 }
 622
 623 #ifdef CONFIG_MAGIC_SYSRQ
 624 /*
 625  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 626  */
 627 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 628                                    size_t count, loff_t *ppos)
 629 {
 630         if (count) {
 631                 char c;
 632
 633                 if (get_user(c, buf))
 634                         return -EFAULT;
 635                 __handle_sysrq(c, NULL, NULL, 0);
 636         }
 637         return count;
 638 }
 639
 640 static struct file_operations proc_sysrq_trigger_operations = {
 641         .write          = write_sysrq_trigger,
 642 };
 643 #endif
 644
 645 struct proc_dir_entry *proc_root_kcore;
 646
 647 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
 648 {
 649         struct proc_dir_entry *entry;
 650         entry = create_proc_entry(name, mode, NULL);
 651         if (entry)
 652                 entry->proc_fops = f;
 653 }
 654
 655 void __init proc_misc_init(void)
 656 {
 657         struct proc_dir_entry *entry;
 658         static struct {
 659                 char *name;
 660                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 661         } *p, simple_ones[] = {
 662                 {"loadavg",     loadavg_read_proc},
 663                 {"uptime",      uptime_read_proc},
 664                 {"meminfo",     meminfo_read_proc},
 665                 {"version",     version_read_proc},
 666 #ifdef CONFIG_PROC_HARDWARE
 667                 {"hardware",    hardware_read_proc},
 668 #endif
 669 #ifdef CONFIG_STRAM_PROC
 670                 {"stram",       stram_read_proc},
 671 #endif
 672                 {"filesystems", filesystems_read_proc},
 673                 {"cmdline",     cmdline_read_proc},
 674                 {"locks",       locks_read_proc},
 675                 {"execdomains", execdomains_read_proc},
 676                 {NULL,}
 677         };
 678         for (p = simple_ones; p->name; p++)
 679                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 680
 681         proc_symlink("mounts", NULL, "self/mounts");
 682
 683         /* And now for trickier ones */
 684         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 685         if (entry)
 686                 entry->proc_fops = &proc_kmsg_operations;
 687         create_seq_entry("devices", 0, &proc_devinfo_operations);
 688         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 689         create_seq_entry("partitions", 0, &proc_partitions_operations);
 690         create_seq_entry("stat", 0, &proc_stat_operations);
 691         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 692 #ifdef CONFIG_SLAB
 693         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 694 #ifdef CONFIG_DEBUG_SLAB_LEAK
 695         create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
 696 #endif
 697 #endif
 698         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 699         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 700         create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
 701         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 702 #ifdef CONFIG_MODULES
 703         create_seq_entry("modules", 0, &proc_modules_operations);
 704 #endif
 705 #ifdef CONFIG_SCHEDSTATS
 706         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
 707 #endif
 708 #ifdef CONFIG_PROC_KCORE
 709         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 710         if (proc_root_kcore) {
 711                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 712                 proc_root_kcore->size =
 713                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 714         }
 715 #endif
 716 #ifdef CONFIG_PROC_VMCORE
 717         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
 718         if (proc_vmcore)
 719                 proc_vmcore->proc_fops = &proc_vmcore_operations;
 720 #endif
 721 #ifdef CONFIG_MAGIC_SYSRQ
 722         entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 723         if (entry)
 724                 entry->proc_fops = &proc_sysrq_trigger_operations;
 725 #endif
 726 }