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 <linux/vs_base.h>
  48 #include <linux/vs_cvirt.h>
  49
  50 #include <asm/uaccess.h>
  51 #include <asm/pgtable.h>
  52 #include <asm/io.h>
  53 #include <asm/pgalloc.h>
  54 #include <asm/tlb.h>
  55 #include <asm/div64.h>
  56
  57 #define LOAD_INT(x) ((x) >> FSHIFT)
  58 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  59 /*
  60  * Warning: stuff below (imported functions) assumes that its output will fit
  61  * into one page. For some of those functions it may be wrong. Moreover, we
  62  * have a way to deal with that gracefully. Right now I used straightforward
  63  * wrappers, but this needs further analysis wrt potential overflows.
  64  */
  65 extern int get_hardware_list(char *);
  66 extern int get_stram_list(char *);
  67 extern int get_chrdev_list(char *);
  68 extern int get_blkdev_list(char *);
  69 extern int get_filesystem_list(char *);
  70 extern int get_exec_domain_list(char *);
  71 extern int get_dma_list(char *);
  72 extern int get_locks_status (char *, char **, off_t, int);
  73 #ifdef CONFIG_SGI_DS1286
  74 extern int get_ds1286_status(char *);
  75 #endif
  76
  77 static int proc_calc_metrics(char *page, char **start, off_t off,
  78                                  int count, int *eof, int len)
  79 {
  80         if (len <= off+count) *eof = 1;
  81         *start = page + off;
  82         len -= off;
  83         if (len>count) len = count;
  84         if (len<0) len = 0;
  85         return len;
  86 }
  87
  88 static int loadavg_read_proc(char *page, char **start, off_t off,
  89                                  int count, int *eof, void *data)
  90 {
  91         int a, b, c;
  92         int len;
  93
  94         a = avenrun[0] + (FIXED_1/200);
  95         b = avenrun[1] + (FIXED_1/200);
  96         c = avenrun[2] + (FIXED_1/200);
  97         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
  98                 LOAD_INT(a), LOAD_FRAC(a),
  99                 LOAD_INT(b), LOAD_FRAC(b),
 100                 LOAD_INT(c), LOAD_FRAC(c),
 101                 nr_running(), nr_threads, last_pid);
 102         return proc_calc_metrics(page, start, off, count, eof, len);
 103 }
 104
 105 struct vmalloc_info {
 106         unsigned long used;
 107         unsigned long largest_chunk;
 108 };
 109
 110 static struct vmalloc_info get_vmalloc_info(void)
 111 {
 112         unsigned long prev_end = VMALLOC_START;
 113         struct vm_struct* vma;
 114         struct vmalloc_info vmi;
 115         vmi.used = 0;
 116
 117         read_lock(&vmlist_lock);
 118
 119         if(!vmlist)
 120                 vmi.largest_chunk = (VMALLOC_END-VMALLOC_START);
 121         else
 122                 vmi.largest_chunk = 0;
 123
 124         for (vma = vmlist; vma; vma = vma->next) {
 125                 unsigned long free_area_size =
 126                         (unsigned long)vma->addr - prev_end;
 127                 vmi.used += vma->size;
 128                 if (vmi.largest_chunk < free_area_size )
 129
 130                         vmi.largest_chunk = free_area_size;
 131                 prev_end = vma->size + (unsigned long)vma->addr;
 132         }
 133         if(VMALLOC_END-prev_end > vmi.largest_chunk)
 134                 vmi.largest_chunk = VMALLOC_END-prev_end;
 135
 136         read_unlock(&vmlist_lock);
 137         return vmi;
 138 }
 139
 140 static int uptime_read_proc(char *page, char **start, off_t off,
 141                                  int count, int *eof, void *data)
 142 {
 143         struct timespec uptime;
 144         struct timespec idle;
 145         int len;
 146         u64 idle_jiffies = init_task.utime + init_task.stime;
 147
 148         do_posix_clock_monotonic_gettime(&uptime);
 149         jiffies_to_timespec(idle_jiffies, &idle);
 150         if (vx_flags(VXF_VIRT_UPTIME, 0))
 151                 vx_vsi_uptime(&uptime, &idle);
 152
 153         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 154                         (unsigned long) uptime.tv_sec,
 155                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
 156                         (unsigned long) idle.tv_sec,
 157                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
 158
 159         return proc_calc_metrics(page, start, off, count, eof, len);
 160 }
 161
 162 static int meminfo_read_proc(char *page, char **start, off_t off,
 163                                  int count, int *eof, void *data)
 164 {
 165         struct sysinfo i;
 166         int len, committed;
 167         struct page_state ps;
 168         unsigned long inactive;
 169         unsigned long active;
 170         unsigned long free;
 171         unsigned long vmtot;
 172         struct vmalloc_info vmi;
 173
 174         get_page_state(&ps);
 175         get_zone_counts(&active, &inactive, &free);
 176
 177 /*
 178  * display in kilobytes.
 179  */
 180 #define K(x) ((x) << (PAGE_SHIFT - 10))
 181         si_meminfo(&i);
 182         si_swapinfo(&i);
 183         committed = atomic_read(&vm_committed_space);
 184
 185         vmtot = (VMALLOC_END-VMALLOC_START)>>10;
 186         vmi = get_vmalloc_info();
 187         vmi.used >>= 10;
 188         vmi.largest_chunk >>= 10;
 189
 190         /*
 191          * Tagged format, for easy grepping and expansion.
 192          */
 193         len = sprintf(page,
 194                 "MemTotal:     %8lu kB\n"
 195                 "MemFree:      %8lu kB\n"
 196                 "Buffers:      %8lu kB\n"
 197                 "Cached:       %8lu kB\n"
 198                 "SwapCached:   %8lu kB\n"
 199                 "Active:       %8lu kB\n"
 200                 "Inactive:     %8lu kB\n"
 201                 "HighTotal:    %8lu kB\n"
 202                 "HighFree:     %8lu kB\n"
 203                 "LowTotal:     %8lu kB\n"
 204                 "LowFree:      %8lu kB\n"
 205                 "SwapTotal:    %8lu kB\n"
 206                 "SwapFree:     %8lu kB\n"
 207                 "Dirty:        %8lu kB\n"
 208                 "Writeback:    %8lu kB\n"
 209                 "Mapped:       %8lu kB\n"
 210                 "Slab:         %8lu kB\n"
 211                 "Committed_AS: %8u kB\n"
 212                 "PageTables:   %8lu kB\n"
 213                 "VmallocTotal: %8lu kB\n"
 214                 "VmallocUsed:  %8lu kB\n"
 215                 "VmallocChunk: %8lu kB\n",
 216                 K(i.totalram),
 217                 K(i.freeram),
 218                 K(i.bufferram),
 219                 K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
 220                 K(total_swapcache_pages),
 221                 K(active),
 222                 K(inactive),
 223                 K(i.totalhigh),
 224                 K(i.freehigh),
 225                 K(i.totalram-i.totalhigh),
 226                 K(i.freeram-i.freehigh),
 227                 K(i.totalswap),
 228                 K(i.freeswap),
 229                 K(ps.nr_dirty),
 230                 K(ps.nr_writeback),
 231                 K(ps.nr_mapped),
 232                 K(ps.nr_slab),
 233                 K(committed),
 234                 K(ps.nr_page_table_pages),
 235                 vmtot,
 236                 vmi.used,
 237                 vmi.largest_chunk
 238                 );
 239
 240                 len += hugetlb_report_meminfo(page + len);
 241
 242         return proc_calc_metrics(page, start, off, count, eof, len);
 243 #undef K
 244 }
 245
 246 extern struct seq_operations fragmentation_op;
 247 static int fragmentation_open(struct inode *inode, struct file *file)
 248 {
 249         (void)inode;
 250         return seq_open(file, &fragmentation_op);
 251 }
 252
 253 static struct file_operations fragmentation_file_operations = {
 254         .open           = fragmentation_open,
 255         .read           = seq_read,
 256         .llseek         = seq_lseek,
 257         .release        = seq_release,
 258 };
 259
 260 static int version_read_proc(char *page, char **start, off_t off,
 261                                  int count, int *eof, void *data)
 262 {
 263         extern char *linux_banner;
 264         int len;
 265
 266         strcpy(page, linux_banner);
 267         len = strlen(page);
 268         return proc_calc_metrics(page, start, off, count, eof, len);
 269 }
 270
 271 extern struct seq_operations cpuinfo_op;
 272 static int cpuinfo_open(struct inode *inode, struct file *file)
 273 {
 274         return seq_open(file, &cpuinfo_op);
 275 }
 276 static struct file_operations proc_cpuinfo_operations = {
 277         .open           = cpuinfo_open,
 278         .read           = seq_read,
 279         .llseek         = seq_lseek,
 280         .release        = seq_release,
 281 };
 282
 283 extern struct seq_operations vmstat_op;
 284 static int vmstat_open(struct inode *inode, struct file *file)
 285 {
 286         return seq_open(file, &vmstat_op);
 287 }
 288 static struct file_operations proc_vmstat_file_operations = {
 289         .open           = vmstat_open,
 290         .read           = seq_read,
 291         .llseek         = seq_lseek,
 292         .release        = seq_release,
 293 };
 294
 295 #ifdef CONFIG_PROC_HARDWARE
 296 static int hardware_read_proc(char *page, char **start, off_t off,
 297                                  int count, int *eof, void *data)
 298 {
 299         int len = get_hardware_list(page);
 300         return proc_calc_metrics(page, start, off, count, eof, len);
 301 }
 302 #endif
 303
 304 #ifdef CONFIG_STRAM_PROC
 305 static int stram_read_proc(char *page, char **start, off_t off,
 306                                  int count, int *eof, void *data)
 307 {
 308         int len = get_stram_list(page);
 309         return proc_calc_metrics(page, start, off, count, eof, len);
 310 }
 311 #endif
 312
 313 extern struct seq_operations partitions_op;
 314 static int partitions_open(struct inode *inode, struct file *file)
 315 {
 316         return seq_open(file, &partitions_op);
 317 }
 318 static struct file_operations proc_partitions_operations = {
 319         .open           = partitions_open,
 320         .read           = seq_read,
 321         .llseek         = seq_lseek,
 322         .release        = seq_release,
 323 };
 324
 325 extern struct seq_operations diskstats_op;
 326 static int diskstats_open(struct inode *inode, struct file *file)
 327 {
 328         return seq_open(file, &diskstats_op);
 329 }
 330 static struct file_operations proc_diskstats_operations = {
 331         .open           = diskstats_open,
 332         .read           = seq_read,
 333         .llseek         = seq_lseek,
 334         .release        = seq_release,
 335 };
 336
 337 #ifdef CONFIG_MODULES
 338 extern struct seq_operations modules_op;
 339 static int modules_open(struct inode *inode, struct file *file)
 340 {
 341         return seq_open(file, &modules_op);
 342 }
 343 static struct file_operations proc_modules_operations = {
 344         .open           = modules_open,
 345         .read           = seq_read,
 346         .llseek         = seq_lseek,
 347         .release        = seq_release,
 348 };
 349 #endif
 350
 351 extern struct seq_operations slabinfo_op;
 352 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 353 static int slabinfo_open(struct inode *inode, struct file *file)
 354 {
 355         return seq_open(file, &slabinfo_op);
 356 }
 357 static struct file_operations proc_slabinfo_operations = {
 358         .open           = slabinfo_open,
 359         .read           = seq_read,
 360         .write          = slabinfo_write,
 361         .llseek         = seq_lseek,
 362         .release        = seq_release,
 363 };
 364
 365 int show_stat(struct seq_file *p, void *v)
 366 {
 367         int i;
 368         extern unsigned long total_forks;
 369         unsigned long jif;
 370         u64     sum = 0, user = 0, nice = 0, system = 0,
 371                 idle = 0, iowait = 0, irq = 0, softirq = 0;
 372
 373         jif = - wall_to_monotonic.tv_sec;
 374         if (wall_to_monotonic.tv_nsec)
 375                 --jif;
 376
 377         for_each_cpu(i) {
 378                 int j;
 379
 380                 user += kstat_cpu(i).cpustat.user;
 381                 nice += kstat_cpu(i).cpustat.nice;
 382                 system += kstat_cpu(i).cpustat.system;
 383                 idle += kstat_cpu(i).cpustat.idle;
 384                 iowait += kstat_cpu(i).cpustat.iowait;
 385                 irq += kstat_cpu(i).cpustat.irq;
 386                 softirq += kstat_cpu(i).cpustat.softirq;
 387                 for (j = 0 ; j < NR_IRQS ; j++)
 388                         sum += kstat_cpu(i).irqs[j];
 389         }
 390
 391         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu\n",
 392                 (unsigned long long)jiffies_64_to_clock_t(user),
 393                 (unsigned long long)jiffies_64_to_clock_t(nice),
 394                 (unsigned long long)jiffies_64_to_clock_t(system),
 395                 (unsigned long long)jiffies_64_to_clock_t(idle),
 396                 (unsigned long long)jiffies_64_to_clock_t(iowait),
 397                 (unsigned long long)jiffies_64_to_clock_t(irq),
 398                 (unsigned long long)jiffies_64_to_clock_t(softirq));
 399         for_each_online_cpu(i) {
 400
 401                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 402                 user = kstat_cpu(i).cpustat.user;
 403                 nice = kstat_cpu(i).cpustat.nice;
 404                 system = kstat_cpu(i).cpustat.system;
 405                 idle = kstat_cpu(i).cpustat.idle;
 406                 iowait = kstat_cpu(i).cpustat.iowait;
 407                 irq = kstat_cpu(i).cpustat.irq;
 408                 softirq = kstat_cpu(i).cpustat.softirq;
 409                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu\n",
 410                         i,
 411                         (unsigned long long)jiffies_64_to_clock_t(user),
 412                         (unsigned long long)jiffies_64_to_clock_t(nice),
 413                         (unsigned long long)jiffies_64_to_clock_t(system),
 414                         (unsigned long long)jiffies_64_to_clock_t(idle),
 415                         (unsigned long long)jiffies_64_to_clock_t(iowait),
 416                         (unsigned long long)jiffies_64_to_clock_t(irq),
 417                         (unsigned long long)jiffies_64_to_clock_t(softirq));
 418         }
 419         seq_printf(p, "intr %llu", (unsigned long long)sum);
 420
 421 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
 422         for (i = 0; i < NR_IRQS; i++)
 423                 seq_printf(p, " %u", kstat_irqs(i));
 424 #endif
 425
 426         seq_printf(p,
 427                 "\nctxt %llu\n"
 428                 "btime %lu\n"
 429                 "processes %lu\n"
 430                 "procs_running %lu\n"
 431                 "procs_blocked %lu\n",
 432                 nr_context_switches(),
 433                 (unsigned long)jif,
 434                 total_forks,
 435                 nr_running(),
 436                 nr_iowait());
 437
 438         return 0;
 439 }
 440
 441 static int stat_open(struct inode *inode, struct file *file)
 442 {
 443         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 444         char *buf;
 445         struct seq_file *m;
 446         int res;
 447
 448         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 449         if (size > 128 * 1024)
 450                 size = 128 * 1024;
 451         buf = kmalloc(size, GFP_KERNEL);
 452         if (!buf)
 453                 return -ENOMEM;
 454
 455         res = single_open(file, show_stat, NULL);
 456         if (!res) {
 457                 m = file->private_data;
 458                 m->buf = buf;
 459                 m->size = size;
 460         } else
 461                 kfree(buf);
 462         return res;
 463 }
 464 static struct file_operations proc_stat_operations = {
 465         .open           = stat_open,
 466         .read           = seq_read,
 467         .llseek         = seq_lseek,
 468         .release        = single_release,
 469 };
 470
 471 static int devices_read_proc(char *page, char **start, off_t off,
 472                                  int count, int *eof, void *data)
 473 {
 474         int len = get_chrdev_list(page);
 475         len += get_blkdev_list(page+len);
 476         return proc_calc_metrics(page, start, off, count, eof, len);
 477 }
 478
 479 /*
 480  * /proc/interrupts
 481  */
 482 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 483 {
 484         return (*pos <= NR_IRQS) ? pos : NULL;
 485 }
 486
 487 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 488 {
 489         (*pos)++;
 490         if (*pos > NR_IRQS)
 491                 return NULL;
 492         return pos;
 493 }
 494
 495 static void int_seq_stop(struct seq_file *f, void *v)
 496 {
 497         /* Nothing to do */
 498 }
 499
 500
 501 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 502 static struct seq_operations int_seq_ops = {
 503         .start = int_seq_start,
 504         .next  = int_seq_next,
 505         .stop  = int_seq_stop,
 506         .show  = show_interrupts
 507 };
 508
 509 int interrupts_open(struct inode *inode, struct file *filp)
 510 {
 511         return seq_open(filp, &int_seq_ops);
 512 }
 513
 514 static struct file_operations proc_interrupts_operations = {
 515         .open           = interrupts_open,
 516         .read           = seq_read,
 517         .llseek         = seq_lseek,
 518         .release        = seq_release,
 519 };
 520
 521 static int filesystems_read_proc(char *page, char **start, off_t off,
 522                                  int count, int *eof, void *data)
 523 {
 524         int len = get_filesystem_list(page);
 525         return proc_calc_metrics(page, start, off, count, eof, len);
 526 }
 527
 528 static int cmdline_read_proc(char *page, char **start, off_t off,
 529                                  int count, int *eof, void *data)
 530 {
 531         extern char saved_command_line[];
 532         int len;
 533
 534         len = sprintf(page, "%s\n", saved_command_line);
 535         return proc_calc_metrics(page, start, off, count, eof, len);
 536 }
 537
 538 #ifdef CONFIG_SGI_DS1286
 539 static int ds1286_read_proc(char *page, char **start, off_t off,
 540                                  int count, int *eof, void *data)
 541 {
 542         int len = get_ds1286_status(page);
 543         return proc_calc_metrics(page, start, off, count, eof, len);
 544 }
 545 #endif
 546
 547 static int locks_read_proc(char *page, char **start, off_t off,
 548                                  int count, int *eof, void *data)
 549 {
 550         int len = get_locks_status(page, start, off, count);
 551
 552         if (len < count)
 553                 *eof = 1;
 554         return len;
 555 }
 556
 557 static int execdomains_read_proc(char *page, char **start, off_t off,
 558                                  int count, int *eof, void *data)
 559 {
 560         int len = get_exec_domain_list(page);
 561         return proc_calc_metrics(page, start, off, count, eof, len);
 562 }
 563
 564 /*
 565  * This function accesses profiling information. The returned data is
 566  * binary: the sampling step and the actual contents of the profile
 567  * buffer. Use of the program readprofile is recommended in order to
 568  * get meaningful info out of these data.
 569  */
 570 static ssize_t
 571 read_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 572 {
 573         unsigned long p = *ppos;
 574         ssize_t read;
 575         char * pnt;
 576         unsigned int sample_step = 1 << prof_shift;
 577
 578         if (p >= (prof_len+1)*sizeof(unsigned int))
 579                 return 0;
 580         if (count > (prof_len+1)*sizeof(unsigned int) - p)
 581                 count = (prof_len+1)*sizeof(unsigned int) - p;
 582         read = 0;
 583
 584         while (p < sizeof(unsigned int) && count > 0) {
 585                 put_user(*((char *)(&sample_step)+p),buf);
 586                 buf++; p++; count--; read++;
 587         }
 588         pnt = (char *)prof_buffer + p - sizeof(unsigned int);
 589         if (copy_to_user(buf,(void *)pnt,count))
 590                 return -EFAULT;
 591         read += count;
 592         *ppos += read;
 593         return read;
 594 }
 595
 596 /*
 597  * Writing to /proc/profile resets the counters
 598  *
 599  * Writing a 'profiling multiplier' value into it also re-sets the profiling
 600  * interrupt frequency, on architectures that support this.
 601  */
 602 static ssize_t write_profile(struct file *file, const char __user *buf,
 603                              size_t count, loff_t *ppos)
 604 {
 605 #ifdef CONFIG_SMP
 606         extern int setup_profiling_timer (unsigned int multiplier);
 607
 608         if (count == sizeof(int)) {
 609                 unsigned int multiplier;
 610
 611                 if (copy_from_user(&multiplier, buf, sizeof(int)))
 612                         return -EFAULT;
 613
 614                 if (setup_profiling_timer(multiplier))
 615                         return -EINVAL;
 616         }
 617 #endif
 618
 619         memset(prof_buffer, 0, prof_len * sizeof(*prof_buffer));
 620         return count;
 621 }
 622
 623 static struct file_operations proc_profile_operations = {
 624         .read           = read_profile,
 625         .write          = write_profile,
 626 };
 627
 628 #ifdef CONFIG_MAGIC_SYSRQ
 629 /*
 630  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 631  */
 632 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 633                                    size_t count, loff_t *ppos)
 634 {
 635         if (count) {
 636                 char c;
 637
 638                 if (get_user(c, buf))
 639                         return -EFAULT;
 640                 __handle_sysrq(c, NULL, NULL);
 641         }
 642         return count;
 643 }
 644
 645 static struct file_operations proc_sysrq_trigger_operations = {
 646         .write          = write_sysrq_trigger,
 647 };
 648 #endif
 649
 650 struct proc_dir_entry *proc_root_kcore;
 651
 652 static void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
 653 {
 654         struct proc_dir_entry *entry;
 655         entry = create_proc_entry(name, mode, NULL);
 656         if (entry)
 657                 entry->proc_fops = f;
 658 }
 659
 660 void __init proc_misc_init(void)
 661 {
 662         struct proc_dir_entry *entry;
 663         static struct {
 664                 char *name;
 665                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 666         } *p, simple_ones[] = {
 667                 {"loadavg",     loadavg_read_proc},
 668                 {"uptime",      uptime_read_proc},
 669                 {"meminfo",     meminfo_read_proc},
 670                 {"version",     version_read_proc},
 671 #ifdef CONFIG_PROC_HARDWARE
 672                 {"hardware",    hardware_read_proc},
 673 #endif
 674 #ifdef CONFIG_STRAM_PROC
 675                 {"stram",       stram_read_proc},
 676 #endif
 677                 {"devices",     devices_read_proc},
 678                 {"filesystems", filesystems_read_proc},
 679                 {"cmdline",     cmdline_read_proc},
 680 #ifdef CONFIG_SGI_DS1286
 681                 {"rtc",         ds1286_read_proc},
 682 #endif
 683                 {"locks",       locks_read_proc},
 684                 {"execdomains", execdomains_read_proc},
 685                 {NULL,}
 686         };
 687         for (p = simple_ones; p->name; p++)
 688                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 689
 690         proc_symlink("mounts", NULL, "self/mounts");
 691
 692         /* And now for trickier ones */
 693         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 694         if (entry)
 695                 entry->proc_fops = &proc_kmsg_operations;
 696         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 697         create_seq_entry("partitions", 0, &proc_partitions_operations);
 698         create_seq_entry("stat", 0, &proc_stat_operations);
 699         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 700         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 701         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 702         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 703         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 704 #ifdef CONFIG_MODULES
 705         create_seq_entry("modules", 0, &proc_modules_operations);
 706 #endif
 707 #ifdef CONFIG_PROC_KCORE
 708         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 709         if (proc_root_kcore) {
 710                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 711                 proc_root_kcore->size =
 712                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 713         }
 714 #endif
 715         if (prof_on) {
 716                 entry = create_proc_entry("profile", S_IWUSR | S_IRUGO, NULL);
 717                 if (entry) {
 718                         entry->proc_fops = &proc_profile_operations;
 719                         entry->size = (1+prof_len) * sizeof(unsigned int);
 720                 }
 721         }
 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 #ifdef CONFIG_PPC32
 728         {
 729                 extern struct file_operations ppc_htab_operations;
 730                 entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
 731                 if (entry)
 732                         entry->proc_fops = &ppc_htab_operations;
 733         }
 734 #endif
 735 }