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