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