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