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/tty.h>
  24 #include <linux/string.h>
  25 #include <linux/mman.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/ioport.h>
  28 #include <linux/config.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 <asm/uaccess.h>
  48 #include <asm/pgtable.h>
  49 #include <asm/io.h>
  50 #include <asm/tlb.h>
  51 #include <asm/div64.h>
  52
  53 #define LOAD_INT(x) ((x) >> FSHIFT)
  54 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  55 /*
  56  * Warning: stuff below (imported functions) assumes that its output will fit
  57  * into one page. For some of those functions it may be wrong. Moreover, we
  58  * have a way to deal with that gracefully. Right now I used straightforward
  59  * wrappers, but this needs further analysis wrt potential overflows.
  60  */
  61 extern int get_hardware_list(char *);
  62 extern int get_stram_list(char *);
  63 extern int get_chrdev_list(char *);
  64 extern int get_blkdev_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 #ifdef CONFIG_SGI_DS1286
  70 extern int get_ds1286_status(char *);
  71 #endif
  72
  73 static int proc_calc_metrics(char *page, char **start, off_t off,
  74                                  int count, int *eof, int len)
  75 {
  76         if (len <= off+count) *eof = 1;
  77         *start = page + off;
  78         len -= off;
  79         if (len>count) len = count;
  80         if (len<0) len = 0;
  81         return len;
  82 }
  83
  84 static int loadavg_read_proc(char *page, char **start, off_t off,
  85                                  int count, int *eof, void *data)
  86 {
  87         int a, b, c;
  88         int len;
  89
  90         a = avenrun[0] + (FIXED_1/200);
  91         b = avenrun[1] + (FIXED_1/200);
  92         c = avenrun[2] + (FIXED_1/200);
  93         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
  94                 LOAD_INT(a), LOAD_FRAC(a),
  95                 LOAD_INT(b), LOAD_FRAC(b),
  96                 LOAD_INT(c), LOAD_FRAC(c),
  97                 nr_running(), nr_threads, last_pid);
  98         return proc_calc_metrics(page, start, off, count, eof, len);
  99 }
 100
 101 struct vmalloc_info {
 102         unsigned long used;
 103         unsigned long largest_chunk;
 104 };
 105
 106 static struct vmalloc_info get_vmalloc_info(void)
 107 {
 108         unsigned long prev_end = VMALLOC_START;
 109         struct vm_struct* vma;
 110         struct vmalloc_info vmi;
 111         vmi.used = 0;
 112
 113         read_lock(&vmlist_lock);
 114
 115         if(!vmlist)
 116                 vmi.largest_chunk = (VMALLOC_END-VMALLOC_START);
 117         else
 118                 vmi.largest_chunk = 0;
 119
 120         for (vma = vmlist; vma; vma = vma->next) {
 121                 unsigned long free_area_size =
 122                         (unsigned long)vma->addr - prev_end;
 123                 vmi.used += vma->size;
 124                 if (vmi.largest_chunk < free_area_size )
 125
 126                         vmi.largest_chunk = free_area_size;
 127                 prev_end = vma->size + (unsigned long)vma->addr;
 128         }
 129         if(VMALLOC_END-prev_end > vmi.largest_chunk)
 130                 vmi.largest_chunk = VMALLOC_END-prev_end;
 131
 132         read_unlock(&vmlist_lock);
 133         return vmi;
 134 }
 135
 136 static int uptime_read_proc(char *page, char **start, off_t off,
 137                                  int count, int *eof, void *data)
 138 {
 139         struct timespec uptime;
 140         struct timespec idle;
 141         int len;
 142         u64 idle_jiffies = init_task.utime + init_task.stime;
 143
 144         do_posix_clock_monotonic_gettime(&uptime);
 145         jiffies_to_timespec(idle_jiffies, &idle);
 146         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 147                         (unsigned long) uptime.tv_sec,
 148                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
 149                         (unsigned long) idle.tv_sec,
 150                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
 151
 152         return proc_calc_metrics(page, start, off, count, eof, len);
 153 }
 154
 155 static int meminfo_read_proc(char *page, char **start, off_t off,
 156                                  int count, int *eof, void *data)
 157 {
 158         struct sysinfo i;
 159         int len, committed;
 160         struct page_state ps;
 161         unsigned long inactive;
 162         unsigned long active;
 163         unsigned long free;
 164         unsigned long vmtot;
 165         struct vmalloc_info vmi;
 166
 167         get_page_state(&ps);
 168         get_zone_counts(&active, &inactive, &free);
 169
 170 /*
 171  * display in kilobytes.
 172  */
 173 #define K(x) ((x) << (PAGE_SHIFT - 10))
 174         si_meminfo(&i);
 175         si_swapinfo(&i);
 176         committed = atomic_read(&vm_committed_space);
 177
 178         vmtot = (VMALLOC_END-VMALLOC_START)>>10;
 179         vmi = get_vmalloc_info();
 180         vmi.used >>= 10;
 181         vmi.largest_chunk >>= 10;
 182
 183         /*
 184          * Tagged format, for easy grepping and expansion.
 185          */
 186         len = sprintf(page,
 187                 "MemTotal:     %8lu kB\n"
 188                 "MemFree:      %8lu kB\n"
 189                 "Buffers:      %8lu kB\n"
 190                 "Cached:       %8lu kB\n"
 191                 "SwapCached:   %8lu kB\n"
 192                 "Active:       %8lu kB\n"
 193                 "Inactive:     %8lu kB\n"
 194                 "HighTotal:    %8lu kB\n"
 195                 "HighFree:     %8lu kB\n"
 196                 "LowTotal:     %8lu kB\n"
 197                 "LowFree:      %8lu kB\n"
 198                 "SwapTotal:    %8lu kB\n"
 199                 "SwapFree:     %8lu kB\n"
 200                 "Dirty:        %8lu kB\n"
 201                 "Writeback:    %8lu kB\n"
 202                 "Mapped:       %8lu kB\n"
 203                 "Slab:         %8lu kB\n"
 204                 "Committed_AS: %8u kB\n"
 205                 "PageTables:   %8lu kB\n"
 206                 "VmallocTotal: %8lu kB\n"
 207                 "VmallocUsed:  %8lu kB\n"
 208                 "VmallocChunk: %8lu kB\n",
 209                 K(i.totalram),
 210                 K(i.freeram),
 211                 K(i.bufferram),
 212                 K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
 213                 K(total_swapcache_pages),
 214                 K(active),
 215                 K(inactive),
 216                 K(i.totalhigh),
 217                 K(i.freehigh),
 218                 K(i.totalram-i.totalhigh),
 219                 K(i.freeram-i.freehigh),
 220                 K(i.totalswap),
 221                 K(i.freeswap),
 222                 K(ps.nr_dirty),
 223                 K(ps.nr_writeback),
 224                 K(ps.nr_mapped),
 225                 K(ps.nr_slab),
 226                 K(committed),
 227                 K(ps.nr_page_table_pages),
 228                 vmtot,
 229                 vmi.used,
 230                 vmi.largest_chunk
 231                 );
 232
 233                 len += hugetlb_report_meminfo(page + len);
 234
 235         return proc_calc_metrics(page, start, off, count, eof, len);
 236 #undef K
 237 }
 238
 239 extern struct seq_operations fragmentation_op;
 240 static int fragmentation_open(struct inode *inode, struct file *file)
 241 {
 242         (void)inode;
 243         return seq_open(file, &fragmentation_op);
 244 }
 245
 246 static struct file_operations fragmentation_file_operations = {
 247         .open           = fragmentation_open,
 248         .read           = seq_read,
 249         .llseek         = seq_lseek,
 250         .release        = seq_release,
 251 };
 252
 253 static int version_read_proc(char *page, char **start, off_t off,
 254                                  int count, int *eof, void *data)
 255 {
 256         extern char *linux_banner;
 257         int len;
 258
 259         strcpy(page, linux_banner);
 260         len = strlen(page);
 261         return proc_calc_metrics(page, start, off, count, eof, len);
 262 }
 263
 264 extern struct seq_operations cpuinfo_op;
 265 static int cpuinfo_open(struct inode *inode, struct file *file)
 266 {
 267         return seq_open(file, &cpuinfo_op);
 268 }
 269 static struct file_operations proc_cpuinfo_operations = {
 270         .open           = cpuinfo_open,
 271         .read           = seq_read,
 272         .llseek         = seq_lseek,
 273         .release        = seq_release,
 274 };
 275
 276 extern struct seq_operations vmstat_op;
 277 static int vmstat_open(struct inode *inode, struct file *file)
 278 {
 279         return seq_open(file, &vmstat_op);
 280 }
 281 static struct file_operations proc_vmstat_file_operations = {
 282         .open           = vmstat_open,
 283         .read           = seq_read,
 284         .llseek         = seq_lseek,
 285         .release        = seq_release,
 286 };
 287
 288 #ifdef CONFIG_PROC_HARDWARE
 289 static int hardware_read_proc(char *page, char **start, off_t off,
 290                                  int count, int *eof, void *data)
 291 {
 292         int len = get_hardware_list(page);
 293         return proc_calc_metrics(page, start, off, count, eof, len);
 294 }
 295 #endif
 296
 297 #ifdef CONFIG_STRAM_PROC
 298 static int stram_read_proc(char *page, char **start, off_t off,
 299                                  int count, int *eof, void *data)
 300 {
 301         int len = get_stram_list(page);
 302         return proc_calc_metrics(page, start, off, count, eof, len);
 303 }
 304 #endif
 305
 306 extern struct seq_operations partitions_op;
 307 static int partitions_open(struct inode *inode, struct file *file)
 308 {
 309         return seq_open(file, &partitions_op);
 310 }
 311 static struct file_operations proc_partitions_operations = {
 312         .open           = partitions_open,
 313         .read           = seq_read,
 314         .llseek         = seq_lseek,
 315         .release        = seq_release,
 316 };
 317
 318 extern struct seq_operations diskstats_op;
 319 static int diskstats_open(struct inode *inode, struct file *file)
 320 {
 321         return seq_open(file, &diskstats_op);
 322 }
 323 static struct file_operations proc_diskstats_operations = {
 324         .open           = diskstats_open,
 325         .read           = seq_read,
 326         .llseek         = seq_lseek,
 327         .release        = seq_release,
 328 };
 329
 330 #ifdef CONFIG_MODULES
 331 extern struct seq_operations modules_op;
 332 static int modules_open(struct inode *inode, struct file *file)
 333 {
 334         return seq_open(file, &modules_op);
 335 }
 336 static struct file_operations proc_modules_operations = {
 337         .open           = modules_open,
 338         .read           = seq_read,
 339         .llseek         = seq_lseek,
 340         .release        = seq_release,
 341 };
 342 #endif
 343
 344 extern struct seq_operations slabinfo_op;
 345 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 346 static int slabinfo_open(struct inode *inode, struct file *file)
 347 {
 348         return seq_open(file, &slabinfo_op);
 349 }
 350 static struct file_operations proc_slabinfo_operations = {
 351         .open           = slabinfo_open,
 352         .read           = seq_read,
 353         .write          = slabinfo_write,
 354         .llseek         = seq_lseek,
 355         .release        = seq_release,
 356 };
 357
 358 int show_stat(struct seq_file *p, void *v)
 359 {
 360         int i;
 361         extern unsigned long total_forks;
 362         unsigned long jif;
 363         u64     sum = 0, user = 0, nice = 0, system = 0,
 364                 idle = 0, iowait = 0, irq = 0, softirq = 0;
 365
 366         jif = - wall_to_monotonic.tv_sec;
 367         if (wall_to_monotonic.tv_nsec)
 368                 --jif;
 369
 370         for_each_cpu(i) {
 371                 int j;
 372
 373                 user += kstat_cpu(i).cpustat.user;
 374                 nice += kstat_cpu(i).cpustat.nice;
 375                 system += kstat_cpu(i).cpustat.system;
 376                 idle += kstat_cpu(i).cpustat.idle;
 377                 iowait += kstat_cpu(i).cpustat.iowait;
 378                 irq += kstat_cpu(i).cpustat.irq;
 379                 softirq += kstat_cpu(i).cpustat.softirq;
 380                 for (j = 0 ; j < NR_IRQS ; j++)
 381                         sum += kstat_cpu(i).irqs[j];
 382         }
 383
 384         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu\n",
 385                 (unsigned long long)jiffies_64_to_clock_t(user),
 386                 (unsigned long long)jiffies_64_to_clock_t(nice),
 387                 (unsigned long long)jiffies_64_to_clock_t(system),
 388                 (unsigned long long)jiffies_64_to_clock_t(idle),
 389                 (unsigned long long)jiffies_64_to_clock_t(iowait),
 390                 (unsigned long long)jiffies_64_to_clock_t(irq),
 391                 (unsigned long long)jiffies_64_to_clock_t(softirq));
 392         for_each_online_cpu(i) {
 393
 394                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 395                 user = kstat_cpu(i).cpustat.user;
 396                 nice = kstat_cpu(i).cpustat.nice;
 397                 system = kstat_cpu(i).cpustat.system;
 398                 idle = kstat_cpu(i).cpustat.idle;
 399                 iowait = kstat_cpu(i).cpustat.iowait;
 400                 irq = kstat_cpu(i).cpustat.irq;
 401                 softirq = kstat_cpu(i).cpustat.softirq;
 402                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu\n",
 403                         i,
 404                         (unsigned long long)jiffies_64_to_clock_t(user),
 405                         (unsigned long long)jiffies_64_to_clock_t(nice),
 406                         (unsigned long long)jiffies_64_to_clock_t(system),
 407                         (unsigned long long)jiffies_64_to_clock_t(idle),
 408                         (unsigned long long)jiffies_64_to_clock_t(iowait),
 409                         (unsigned long long)jiffies_64_to_clock_t(irq),
 410                         (unsigned long long)jiffies_64_to_clock_t(softirq));
 411         }
 412         seq_printf(p, "intr %llu", (unsigned long long)sum);
 413
 414 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
 415         for (i = 0; i < NR_IRQS; i++)
 416                 seq_printf(p, " %u", kstat_irqs(i));
 417 #endif
 418
 419         seq_printf(p,
 420                 "\nctxt %llu\n"
 421                 "btime %lu\n"
 422                 "processes %lu\n"
 423                 "procs_running %lu\n"
 424                 "procs_blocked %lu\n",
 425                 nr_context_switches(),
 426                 (unsigned long)jif,
 427                 total_forks,
 428                 nr_running(),
 429                 nr_iowait());
 430
 431         return 0;
 432 }
 433
 434 static int stat_open(struct inode *inode, struct file *file)
 435 {
 436         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 437         char *buf;
 438         struct seq_file *m;
 439         int res;
 440
 441         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 442         if (size > 128 * 1024)
 443                 size = 128 * 1024;
 444         buf = kmalloc(size, GFP_KERNEL);
 445         if (!buf)
 446                 return -ENOMEM;
 447
 448         res = single_open(file, show_stat, NULL);
 449         if (!res) {
 450                 m = file->private_data;
 451                 m->buf = buf;
 452                 m->size = size;
 453         } else
 454                 kfree(buf);
 455         return res;
 456 }
 457 static struct file_operations proc_stat_operations = {
 458         .open           = stat_open,
 459         .read           = seq_read,
 460         .llseek         = seq_lseek,
 461         .release        = single_release,
 462 };
 463
 464 static int devices_read_proc(char *page, char **start, off_t off,
 465                                  int count, int *eof, void *data)
 466 {
 467         int len = get_chrdev_list(page);
 468         len += get_blkdev_list(page+len);
 469         return proc_calc_metrics(page, start, off, count, eof, len);
 470 }
 471
 472 /*
 473  * /proc/interrupts
 474  */
 475 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 476 {
 477         return (*pos <= NR_IRQS) ? pos : NULL;
 478 }
 479
 480 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 481 {
 482         (*pos)++;
 483         if (*pos > NR_IRQS)
 484                 return NULL;
 485         return pos;
 486 }
 487
 488 static void int_seq_stop(struct seq_file *f, void *v)
 489 {
 490         /* Nothing to do */
 491 }
 492
 493
 494 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 495 static struct seq_operations int_seq_ops = {
 496         .start = int_seq_start,
 497         .next  = int_seq_next,
 498         .stop  = int_seq_stop,
 499         .show  = show_interrupts
 500 };
 501
 502 int interrupts_open(struct inode *inode, struct file *filp)
 503 {
 504         return seq_open(filp, &int_seq_ops);
 505 }
 506
 507 static struct file_operations proc_interrupts_operations = {
 508         .open           = interrupts_open,
 509         .read           = seq_read,
 510         .llseek         = seq_lseek,
 511         .release        = seq_release,
 512 };
 513
 514 static int filesystems_read_proc(char *page, char **start, off_t off,
 515                                  int count, int *eof, void *data)
 516 {
 517         int len = get_filesystem_list(page);
 518         return proc_calc_metrics(page, start, off, count, eof, len);
 519 }
 520
 521 static int cmdline_read_proc(char *page, char **start, off_t off,
 522                                  int count, int *eof, void *data)
 523 {
 524         extern char saved_command_line[];
 525         int len;
 526
 527         len = sprintf(page, "%s\n", saved_command_line);
 528         return proc_calc_metrics(page, start, off, count, eof, len);
 529 }
 530
 531 #ifdef CONFIG_SGI_DS1286
 532 static int ds1286_read_proc(char *page, char **start, off_t off,
 533                                  int count, int *eof, void *data)
 534 {
 535         int len = get_ds1286_status(page);
 536         return proc_calc_metrics(page, start, off, count, eof, len);
 537 }
 538 #endif
 539
 540 static int locks_read_proc(char *page, char **start, off_t off,
 541                                  int count, int *eof, void *data)
 542 {
 543         int len = get_locks_status(page, start, off, count);
 544
 545         if (len < count)
 546                 *eof = 1;
 547         return len;
 548 }
 549
 550 static int execdomains_read_proc(char *page, char **start, off_t off,
 551                                  int count, int *eof, void *data)
 552 {
 553         int len = get_exec_domain_list(page);
 554         return proc_calc_metrics(page, start, off, count, eof, len);
 555 }
 556
 557 /*
 558  * This function accesses profiling information. The returned data is
 559  * binary: the sampling step and the actual contents of the profile
 560  * buffer. Use of the program readprofile is recommended in order to
 561  * get meaningful info out of these data.
 562  */
 563 static ssize_t
 564 read_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 565 {
 566         unsigned long p = *ppos;
 567         ssize_t read;
 568         char * pnt;
 569         unsigned int sample_step = 1 << prof_shift;
 570
 571         if (p >= (prof_len+1)*sizeof(unsigned int))
 572                 return 0;
 573         if (count > (prof_len+1)*sizeof(unsigned int) - p)
 574                 count = (prof_len+1)*sizeof(unsigned int) - p;
 575         read = 0;
 576
 577         while (p < sizeof(unsigned int) && count > 0) {
 578                 put_user(*((char *)(&sample_step)+p),buf);
 579                 buf++; p++; count--; read++;
 580         }
 581         pnt = (char *)prof_buffer + p - sizeof(unsigned int);
 582         if (copy_to_user(buf,(void *)pnt,count))
 583                 return -EFAULT;
 584         read += count;
 585         *ppos += read;
 586         return read;
 587 }
 588
 589 /*
 590  * Writing to /proc/profile resets the counters
 591  *
 592  * Writing a 'profiling multiplier' value into it also re-sets the profiling
 593  * interrupt frequency, on architectures that support this.
 594  */
 595 static ssize_t write_profile(struct file *file, const char __user *buf,
 596                              size_t count, loff_t *ppos)
 597 {
 598 #ifdef CONFIG_SMP
 599         extern int setup_profiling_timer (unsigned int multiplier);
 600
 601         if (count == sizeof(int)) {
 602                 unsigned int multiplier;
 603
 604                 if (copy_from_user(&multiplier, buf, sizeof(int)))
 605                         return -EFAULT;
 606
 607                 if (setup_profiling_timer(multiplier))
 608                         return -EINVAL;
 609         }
 610 #endif
 611
 612         memset(prof_buffer, 0, prof_len * sizeof(*prof_buffer));
 613         return count;
 614 }
 615
 616 static struct file_operations proc_profile_operations = {
 617         .read           = read_profile,
 618         .write          = write_profile,
 619 };
 620
 621 #ifdef CONFIG_MAGIC_SYSRQ
 622 /*
 623  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 624  */
 625 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 626                                    size_t count, loff_t *ppos)
 627 {
 628         if (count) {
 629                 char c;
 630
 631                 if (get_user(c, buf))
 632                         return -EFAULT;
 633                 __handle_sysrq(c, NULL, NULL);
 634         }
 635         return count;
 636 }
 637
 638 static struct file_operations proc_sysrq_trigger_operations = {
 639         .write          = write_sysrq_trigger,
 640 };
 641 #endif
 642
 643 struct proc_dir_entry *proc_root_kcore;
 644
 645 static void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
 646 {
 647         struct proc_dir_entry *entry;
 648         entry = create_proc_entry(name, mode, NULL);
 649         if (entry)
 650                 entry->proc_fops = f;
 651 }
 652
 653 void __init proc_misc_init(void)
 654 {
 655         struct proc_dir_entry *entry;
 656         static struct {
 657                 char *name;
 658                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 659         } *p, simple_ones[] = {
 660                 {"loadavg",     loadavg_read_proc},
 661                 {"uptime",      uptime_read_proc},
 662                 {"meminfo",     meminfo_read_proc},
 663                 {"version",     version_read_proc},
 664 #ifdef CONFIG_PROC_HARDWARE
 665                 {"hardware",    hardware_read_proc},
 666 #endif
 667 #ifdef CONFIG_STRAM_PROC
 668                 {"stram",       stram_read_proc},
 669 #endif
 670                 {"devices",     devices_read_proc},
 671                 {"filesystems", filesystems_read_proc},
 672                 {"cmdline",     cmdline_read_proc},
 673 #ifdef CONFIG_SGI_DS1286
 674                 {"rtc",         ds1286_read_proc},
 675 #endif
 676                 {"locks",       locks_read_proc},
 677                 {"execdomains", execdomains_read_proc},
 678                 {NULL,}
 679         };
 680         for (p = simple_ones; p->name; p++)
 681                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 682
 683         proc_symlink("mounts", NULL, "self/mounts");
 684
 685         /* And now for trickier ones */
 686         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 687         if (entry)
 688                 entry->proc_fops = &proc_kmsg_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         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 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("diskstats", 0, &proc_diskstats_operations);
 697 #ifdef CONFIG_MODULES
 698         create_seq_entry("modules", 0, &proc_modules_operations);
 699 #endif
 700 #ifdef CONFIG_PROC_KCORE
 701         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 702         if (proc_root_kcore) {
 703                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 704                 proc_root_kcore->size =
 705                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 706         }
 707 #endif
 708         if (prof_on) {
 709                 entry = create_proc_entry("profile", S_IWUSR | S_IRUGO, NULL);
 710                 if (entry) {
 711                         entry->proc_fops = &proc_profile_operations;
 712                         entry->size = (1+prof_len) * sizeof(unsigned int);
 713                 }
 714         }
 715 #ifdef CONFIG_MAGIC_SYSRQ
 716         entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 717         if (entry)
 718                 entry->proc_fops = &proc_sysrq_trigger_operations;
 719 #endif
 720 #ifdef CONFIG_PPC32
 721         {
 722                 extern struct file_operations ppc_htab_operations;
 723                 entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
 724                 if (entry)
 725                         entry->proc_fops = &ppc_htab_operations;
 726         }
 727 #endif
 728 }