fs/proc/proc_misc.c

   1 /*
   2  *  linux/fs/proc/proc_misc.c
   3  *
   4  *  linux/fs/proc/array.c
   5  *  Copyright (C) 1992  by Linus Torvalds
   6  *  based on ideas by Darren Senn
   7  *
   8  *  This used to be the part of array.c. See the rest of history and credits
   9  *  there. I took this into a separate file and switched the thing to generic
  10  *  proc_file_inode_operations, leaving in array.c only per-process stuff.
  11  *  Inumbers allocation made dynamic (via create_proc_entry()).  AV, May 1999.
  12  *
  13  * Changes:
  14  * Fulton Green      :  Encapsulated position metric calculations.
  15  *                      <kernel@FultonGreen.com>
  16  */
  17
  18 #include <linux/types.h>
  19 #include <linux/errno.h>
  20 #include <linux/time.h>
  21 #include <linux/kernel.h>
  22 #include <linux/kernel_stat.h>
  23 #include <linux/fs.h>
  24 #include <linux/tty.h>
  25 #include <linux/string.h>
  26 #include <linux/mman.h>
  27 #include <linux/proc_fs.h>
  28 #include <linux/ioport.h>
  29 #include <linux/config.h>
  30 #include <linux/mm.h>
  31 #include <linux/mmzone.h>
  32 #include <linux/pagemap.h>
  33 #include <linux/swap.h>
  34 #include <linux/slab.h>
  35 #include <linux/smp.h>
  36 #include <linux/signal.h>
  37 #include <linux/module.h>
  38 #include <linux/init.h>
  39 #include <linux/smp_lock.h>
  40 #include <linux/seq_file.h>
  41 #include <linux/times.h>
  42 #include <linux/profile.h>
  43 #include <linux/blkdev.h>
  44 #include <linux/hugetlb.h>
  45 #include <linux/jiffies.h>
  46 #include <linux/sysrq.h>
  47 #include <linux/vmalloc.h>
  48 #include <linux/crash_dump.h>
  49 #include <asm/uaccess.h>
  50 #include <asm/pgtable.h>
  51 #include <asm/io.h>
  52 #include <asm/tlb.h>
  53 #include <asm/div64.h>
  54 #include "internal.h"
  55
  56 #include <linux/vs_cvirt.h>
  57
  58 #define LOAD_INT(x) ((x) >> FSHIFT)
  59 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  60 /*
  61  * Warning: stuff below (imported functions) assumes that its output will fit
  62  * into one page. For some of those functions it may be wrong. Moreover, we
  63  * have a way to deal with that gracefully. Right now I used straightforward
  64  * wrappers, but this needs further analysis wrt potential overflows.
  65  */
  66 extern int get_hardware_list(char *);
  67 extern int get_stram_list(char *);
  68 extern int get_filesystem_list(char *);
  69 extern int get_exec_domain_list(char *);
  70 extern int get_dma_list(char *);
  71 extern int get_locks_status (char *, char **, off_t, int);
  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         unsigned int running, threads;
  88         int a, b, c;
  89         int len;
  90
  91         if (vx_flags(VXF_VIRT_LOAD, 0)) {
  92                 struct vx_info *vxi = current->vx_info;
  93
  94                 a = vxi->cvirt.load[0] + (FIXED_1/200);
  95                 b = vxi->cvirt.load[1] + (FIXED_1/200);
  96                 c = vxi->cvirt.load[2] + (FIXED_1/200);
  97
  98                 running = atomic_read(&vxi->cvirt.nr_running);
  99                 threads = atomic_read(&vxi->cvirt.nr_threads);
 100         } else {
 101                 a = avenrun[0] + (FIXED_1/200);
 102                 b = avenrun[1] + (FIXED_1/200);
 103                 c = avenrun[2] + (FIXED_1/200);
 104
 105                 running = nr_running();
 106                 threads = nr_threads;
 107         }
 108         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %d/%d %d\n",
 109                 LOAD_INT(a), LOAD_FRAC(a),
 110                 LOAD_INT(b), LOAD_FRAC(b),
 111                 LOAD_INT(c), LOAD_FRAC(c),
 112                 running, threads, last_pid);
 113         return proc_calc_metrics(page, start, off, count, eof, len);
 114 }
 115
 116 static int uptime_read_proc(char *page, char **start, off_t off,
 117                                  int count, int *eof, void *data)
 118 {
 119         struct timespec uptime;
 120         struct timespec idle;
 121         int len;
 122         cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
 123
 124         do_posix_clock_monotonic_gettime(&uptime);
 125         cputime_to_timespec(idletime, &idle);
 126         if (vx_flags(VXF_VIRT_UPTIME, 0))
 127                 vx_vsi_uptime(&uptime, &idle);
 128
 129         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 130                         (unsigned long) uptime.tv_sec,
 131                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
 132                         (unsigned long) idle.tv_sec,
 133                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
 134
 135         return proc_calc_metrics(page, start, off, count, eof, len);
 136 }
 137
 138 static int meminfo_read_proc(char *page, char **start, off_t off,
 139                                  int count, int *eof, void *data)
 140 {
 141         struct sysinfo i;
 142         int len;
 143         struct page_state ps;
 144         unsigned long inactive;
 145         unsigned long active;
 146         unsigned long free;
 147         unsigned long committed;
 148         unsigned long allowed;
 149         struct vmalloc_info vmi;
 150         long cached;
 151
 152         get_page_state(&ps);
 153         get_zone_counts(&active, &inactive, &free);
 154
 155 /*
 156  * display in kilobytes.
 157  */
 158 #define K(x) ((x) << (PAGE_SHIFT - 10))
 159         si_meminfo(&i);
 160         si_swapinfo(&i);
 161         committed = atomic_read(&vm_committed_space);
 162         allowed = ((totalram_pages - hugetlb_total_pages())
 163                 * sysctl_overcommit_ratio / 100) + total_swap_pages;
 164
 165         cached = get_page_cache_size() - total_swapcache_pages - i.bufferram;
 166         if (cached < 0 || vx_flags(VXF_VIRT_MEM, 0))
 167                 cached = 0;
 168
 169         get_vmalloc_info(&vmi);
 170
 171         /*
 172          * Tagged format, for easy grepping and expansion.
 173          */
 174         len = sprintf(page,
 175                 "MemTotal:     %8lu kB\n"
 176                 "MemFree:      %8lu kB\n"
 177                 "Buffers:      %8lu kB\n"
 178                 "Cached:       %8lu kB\n"
 179                 "SwapCached:   %8lu kB\n"
 180                 "Active:       %8lu kB\n"
 181                 "Inactive:     %8lu kB\n"
 182                 "HighTotal:    %8lu kB\n"
 183                 "HighFree:     %8lu kB\n"
 184                 "LowTotal:     %8lu kB\n"
 185                 "LowFree:      %8lu kB\n"
 186                 "SwapTotal:    %8lu kB\n"
 187                 "SwapFree:     %8lu kB\n"
 188                 "Dirty:        %8lu kB\n"
 189                 "Writeback:    %8lu kB\n"
 190                 "Mapped:       %8lu kB\n"
 191                 "Slab:         %8lu kB\n"
 192                 "CommitLimit:  %8lu kB\n"
 193                 "Committed_AS: %8lu kB\n"
 194                 "PageTables:   %8lu kB\n"
 195                 "VmallocTotal: %8lu kB\n"
 196                 "VmallocUsed:  %8lu kB\n"
 197                 "VmallocChunk: %8lu kB\n",
 198                 K(i.totalram),
 199                 K(i.freeram),
 200                 K(i.bufferram),
 201                 K(cached),
 202                 K(total_swapcache_pages),
 203                 K(active),
 204                 K(inactive),
 205                 K(i.totalhigh),
 206                 K(i.freehigh),
 207                 K(i.totalram-i.totalhigh),
 208                 K(i.freeram-i.freehigh),
 209                 K(i.totalswap),
 210                 K(i.freeswap),
 211                 K(ps.nr_dirty),
 212                 K(ps.nr_writeback),
 213                 K(ps.nr_mapped),
 214                 K(ps.nr_slab),
 215                 K(allowed),
 216                 K(committed),
 217                 K(ps.nr_page_table_pages),
 218                 (unsigned long)VMALLOC_TOTAL >> 10,
 219                 vmi.used >> 10,
 220                 vmi.largest_chunk >> 10
 221                 );
 222
 223                 len += hugetlb_report_meminfo(page + len);
 224
 225         return proc_calc_metrics(page, start, off, count, eof, len);
 226 #undef K
 227 }
 228
 229 extern struct seq_operations fragmentation_op;
 230 static int fragmentation_open(struct inode *inode, struct file *file)
 231 {
 232         (void)inode;
 233         return seq_open(file, &fragmentation_op);
 234 }
 235
 236 static struct file_operations fragmentation_file_operations = {
 237         .open           = fragmentation_open,
 238         .read           = seq_read,
 239         .llseek         = seq_lseek,
 240         .release        = seq_release,
 241 };
 242
 243 extern struct seq_operations zoneinfo_op;
 244 static int zoneinfo_open(struct inode *inode, struct file *file)
 245 {
 246         return seq_open(file, &zoneinfo_op);
 247 }
 248
 249 static struct file_operations proc_zoneinfo_file_operations = {
 250         .open           = zoneinfo_open,
 251         .read           = seq_read,
 252         .llseek         = seq_lseek,
 253         .release        = seq_release,
 254 };
 255
 256 static int version_read_proc(char *page, char **start, off_t off,
 257                                  int count, int *eof, void *data)
 258 {
 259         int len;
 260
 261         len = sprintf(page, vx_linux_banner,
 262                 vx_new_uts(release),
 263                 vx_new_uts(version));
 264         return proc_calc_metrics(page, start, off, count, eof, len);
 265 }
 266
 267 extern struct seq_operations cpuinfo_op;
 268 static int cpuinfo_open(struct inode *inode, struct file *file)
 269 {
 270         return seq_open(file, &cpuinfo_op);
 271 }
 272
 273 static struct file_operations proc_cpuinfo_operations = {
 274         .open           = cpuinfo_open,
 275         .read           = seq_read,
 276         .llseek         = seq_lseek,
 277         .release        = seq_release,
 278 };
 279
 280 static int devinfo_show(struct seq_file *f, void *v)
 281 {
 282         int i = *(loff_t *) v;
 283
 284         if (i < CHRDEV_MAJOR_HASH_SIZE) {
 285                 if (i == 0)
 286                         seq_printf(f, "Character devices:\n");
 287                 chrdev_show(f, i);
 288         } else {
 289                 i -= CHRDEV_MAJOR_HASH_SIZE;
 290                 if (i == 0)
 291                         seq_printf(f, "\nBlock devices:\n");
 292                 blkdev_show(f, i);
 293         }
 294         return 0;
 295 }
 296
 297 static void *devinfo_start(struct seq_file *f, loff_t *pos)
 298 {
 299         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 300                 return pos;
 301         return NULL;
 302 }
 303
 304 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
 305 {
 306         (*pos)++;
 307         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 308                 return NULL;
 309         return pos;
 310 }
 311
 312 static void devinfo_stop(struct seq_file *f, void *v)
 313 {
 314         /* Nothing to do */
 315 }
 316
 317 static struct seq_operations devinfo_ops = {
 318         .start = devinfo_start,
 319         .next  = devinfo_next,
 320         .stop  = devinfo_stop,
 321         .show  = devinfo_show
 322 };
 323
 324 static int devinfo_open(struct inode *inode, struct file *filp)
 325 {
 326         return seq_open(filp, &devinfo_ops);
 327 }
 328
 329 static struct file_operations proc_devinfo_operations = {
 330         .open           = devinfo_open,
 331         .read           = seq_read,
 332         .llseek         = seq_lseek,
 333         .release        = seq_release,
 334 };
 335
 336 extern struct seq_operations vmstat_op;
 337 static int vmstat_open(struct inode *inode, struct file *file)
 338 {
 339         return seq_open(file, &vmstat_op);
 340 }
 341 static struct file_operations proc_vmstat_file_operations = {
 342         .open           = vmstat_open,
 343         .read           = seq_read,
 344         .llseek         = seq_lseek,
 345         .release        = seq_release,
 346 };
 347
 348 #ifdef CONFIG_PROC_HARDWARE
 349 static int hardware_read_proc(char *page, char **start, off_t off,
 350                                  int count, int *eof, void *data)
 351 {
 352         int len = get_hardware_list(page);
 353         return proc_calc_metrics(page, start, off, count, eof, len);
 354 }
 355 #endif
 356
 357 #ifdef CONFIG_STRAM_PROC
 358 static int stram_read_proc(char *page, char **start, off_t off,
 359                                  int count, int *eof, void *data)
 360 {
 361         int len = get_stram_list(page);
 362         return proc_calc_metrics(page, start, off, count, eof, len);
 363 }
 364 #endif
 365
 366 extern struct seq_operations partitions_op;
 367 static int partitions_open(struct inode *inode, struct file *file)
 368 {
 369         return seq_open(file, &partitions_op);
 370 }
 371 static struct file_operations proc_partitions_operations = {
 372         .open           = partitions_open,
 373         .read           = seq_read,
 374         .llseek         = seq_lseek,
 375         .release        = seq_release,
 376 };
 377
 378 extern struct seq_operations diskstats_op;
 379 static int diskstats_open(struct inode *inode, struct file *file)
 380 {
 381         return seq_open(file, &diskstats_op);
 382 }
 383 static struct file_operations proc_diskstats_operations = {
 384         .open           = diskstats_open,
 385         .read           = seq_read,
 386         .llseek         = seq_lseek,
 387         .release        = seq_release,
 388 };
 389
 390 #ifdef CONFIG_MODULES
 391 extern struct seq_operations modules_op;
 392 static int modules_open(struct inode *inode, struct file *file)
 393 {
 394         return seq_open(file, &modules_op);
 395 }
 396 static struct file_operations proc_modules_operations = {
 397         .open           = modules_open,
 398         .read           = seq_read,
 399         .llseek         = seq_lseek,
 400         .release        = seq_release,
 401 };
 402 #endif
 403
 404 #ifdef CONFIG_SLAB
 405 extern struct seq_operations slabinfo_op;
 406 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
 407 static int slabinfo_open(struct inode *inode, struct file *file)
 408 {
 409         return seq_open(file, &slabinfo_op);
 410 }
 411 static struct file_operations proc_slabinfo_operations = {
 412         .open           = slabinfo_open,
 413         .read           = seq_read,
 414         .write          = slabinfo_write,
 415         .llseek         = seq_lseek,
 416         .release        = seq_release,
 417 };
 418
 419 #ifdef CONFIG_DEBUG_SLAB_LEAK
 420 extern struct seq_operations slabstats_op;
 421 static int slabstats_open(struct inode *inode, struct file *file)
 422 {
 423         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
 424         int ret = -ENOMEM;
 425         if (n) {
 426                 ret = seq_open(file, &slabstats_op);
 427                 if (!ret) {
 428                         struct seq_file *m = file->private_data;
 429                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
 430                         m->private = n;
 431                         n = NULL;
 432                 }
 433                 kfree(n);
 434         }
 435         return ret;
 436 }
 437
 438 static int slabstats_release(struct inode *inode, struct file *file)
 439 {
 440         struct seq_file *m = file->private_data;
 441         kfree(m->private);
 442         return seq_release(inode, file);
 443 }
 444
 445 static struct file_operations proc_slabstats_operations = {
 446         .open           = slabstats_open,
 447         .read           = seq_read,
 448         .llseek         = seq_lseek,
 449         .release        = slabstats_release,
 450 };
 451 #endif
 452 #endif
 453
 454 static int show_stat(struct seq_file *p, void *v)
 455 {
 456         int i;
 457         unsigned long jif;
 458         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
 459         u64 sum = 0;
 460
 461         user = nice = system = idle = iowait =
 462                 irq = softirq = steal = cputime64_zero;
 463         jif = - wall_to_monotonic.tv_sec;
 464         if (wall_to_monotonic.tv_nsec)
 465                 --jif;
 466
 467         for_each_possible_cpu(i) {
 468                 int j;
 469
 470                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
 471                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
 472                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
 473                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
 474                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
 475                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
 476                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
 477                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
 478                 for (j = 0 ; j < NR_IRQS ; j++)
 479                         sum += kstat_cpu(i).irqs[j];
 480         }
 481
 482         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",
 483                 (unsigned long long)cputime64_to_clock_t(user),
 484                 (unsigned long long)cputime64_to_clock_t(nice),
 485                 (unsigned long long)cputime64_to_clock_t(system),
 486                 (unsigned long long)cputime64_to_clock_t(idle),
 487                 (unsigned long long)cputime64_to_clock_t(iowait),
 488                 (unsigned long long)cputime64_to_clock_t(irq),
 489                 (unsigned long long)cputime64_to_clock_t(softirq),
 490                 (unsigned long long)cputime64_to_clock_t(steal));
 491         for_each_online_cpu(i) {
 492
 493                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 494                 user = kstat_cpu(i).cpustat.user;
 495                 nice = kstat_cpu(i).cpustat.nice;
 496                 system = kstat_cpu(i).cpustat.system;
 497                 idle = kstat_cpu(i).cpustat.idle;
 498                 iowait = kstat_cpu(i).cpustat.iowait;
 499                 irq = kstat_cpu(i).cpustat.irq;
 500                 softirq = kstat_cpu(i).cpustat.softirq;
 501                 steal = kstat_cpu(i).cpustat.steal;
 502                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
 503                         i,
 504                         (unsigned long long)cputime64_to_clock_t(user),
 505                         (unsigned long long)cputime64_to_clock_t(nice),
 506                         (unsigned long long)cputime64_to_clock_t(system),
 507                         (unsigned long long)cputime64_to_clock_t(idle),
 508                         (unsigned long long)cputime64_to_clock_t(iowait),
 509                         (unsigned long long)cputime64_to_clock_t(irq),
 510                         (unsigned long long)cputime64_to_clock_t(softirq),
 511                         (unsigned long long)cputime64_to_clock_t(steal));
 512         }
 513         seq_printf(p, "intr %llu", (unsigned long long)sum);
 514
 515 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
 516         for (i = 0; i < NR_IRQS; i++)
 517                 seq_printf(p, " %u", kstat_irqs(i));
 518 #endif
 519
 520         seq_printf(p,
 521                 "\nctxt %llu\n"
 522                 "btime %lu\n"
 523                 "processes %lu\n"
 524                 "procs_running %lu\n"
 525                 "procs_blocked %lu\n",
 526                 nr_context_switches(),
 527                 (unsigned long)jif,
 528                 total_forks,
 529                 nr_running(),
 530                 nr_iowait());
 531
 532         return 0;
 533 }
 534
 535 static int stat_open(struct inode *inode, struct file *file)
 536 {
 537         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 538         char *buf;
 539         struct seq_file *m;
 540         int res;
 541
 542         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 543         if (size > 128 * 1024)
 544                 size = 128 * 1024;
 545         buf = kmalloc(size, GFP_KERNEL);
 546         if (!buf)
 547                 return -ENOMEM;
 548
 549         res = single_open(file, show_stat, NULL);
 550         if (!res) {
 551                 m = file->private_data;
 552                 m->buf = buf;
 553                 m->size = size;
 554         } else
 555                 kfree(buf);
 556         return res;
 557 }
 558 static struct file_operations proc_stat_operations = {
 559         .open           = stat_open,
 560         .read           = seq_read,
 561         .llseek         = seq_lseek,
 562         .release        = single_release,
 563 };
 564
 565 /*
 566  * /proc/interrupts
 567  */
 568 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 569 {
 570         return (*pos <= NR_IRQS) ? pos : NULL;
 571 }
 572
 573 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 574 {
 575         (*pos)++;
 576         if (*pos > NR_IRQS)
 577                 return NULL;
 578         return pos;
 579 }
 580
 581 static void int_seq_stop(struct seq_file *f, void *v)
 582 {
 583         /* Nothing to do */
 584 }
 585
 586
 587 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 588 static struct seq_operations int_seq_ops = {
 589         .start = int_seq_start,
 590         .next  = int_seq_next,
 591         .stop  = int_seq_stop,
 592         .show  = show_interrupts
 593 };
 594
 595 static int interrupts_open(struct inode *inode, struct file *filp)
 596 {
 597         return seq_open(filp, &int_seq_ops);
 598 }
 599
 600 static struct file_operations proc_interrupts_operations = {
 601         .open           = interrupts_open,
 602         .read           = seq_read,
 603         .llseek         = seq_lseek,
 604         .release        = seq_release,
 605 };
 606
 607 static int filesystems_read_proc(char *page, char **start, off_t off,
 608                                  int count, int *eof, void *data)
 609 {
 610         int len = get_filesystem_list(page);
 611         return proc_calc_metrics(page, start, off, count, eof, len);
 612 }
 613
 614 static int cmdline_read_proc(char *page, char **start, off_t off,
 615                                  int count, int *eof, void *data)
 616 {
 617         int len;
 618
 619         len = sprintf(page, "%s\n", saved_command_line);
 620         return proc_calc_metrics(page, start, off, count, eof, len);
 621 }
 622
 623 static int locks_read_proc(char *page, char **start, off_t off,
 624                                  int count, int *eof, void *data)
 625 {
 626         int len = get_locks_status(page, start, off, count);
 627
 628         if (len < count)
 629                 *eof = 1;
 630         return len;
 631 }
 632
 633 static int execdomains_read_proc(char *page, char **start, off_t off,
 634                                  int count, int *eof, void *data)
 635 {
 636         int len = get_exec_domain_list(page);
 637         return proc_calc_metrics(page, start, off, count, eof, len);
 638 }
 639
 640 #ifdef CONFIG_MAGIC_SYSRQ
 641 /*
 642  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 643  */
 644 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 645                                    size_t count, loff_t *ppos)
 646 {
 647         if (count) {
 648                 char c;
 649
 650                 if (get_user(c, buf))
 651                         return -EFAULT;
 652                 __handle_sysrq(c, NULL, NULL, 0);
 653         }
 654         return count;
 655 }
 656
 657 static struct file_operations proc_sysrq_trigger_operations = {
 658         .write          = write_sysrq_trigger,
 659 };
 660 #endif
 661
 662 struct proc_dir_entry *proc_root_kcore;
 663
 664 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
 665 {
 666         struct proc_dir_entry *entry;
 667         entry = create_proc_entry(name, mode, NULL);
 668         if (entry)
 669                 entry->proc_fops = f;
 670 }
 671
 672 void __init proc_misc_init(void)
 673 {
 674         struct proc_dir_entry *entry;
 675         static struct {
 676                 char *name;
 677                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 678         } *p, simple_ones[] = {
 679                 {"loadavg",     loadavg_read_proc},
 680                 {"uptime",      uptime_read_proc},
 681                 {"meminfo",     meminfo_read_proc},
 682                 {"version",     version_read_proc},
 683 #ifdef CONFIG_PROC_HARDWARE
 684                 {"hardware",    hardware_read_proc},
 685 #endif
 686 #ifdef CONFIG_STRAM_PROC
 687                 {"stram",       stram_read_proc},
 688 #endif
 689                 {"filesystems", filesystems_read_proc},
 690                 {"cmdline",     cmdline_read_proc},
 691                 {"locks",       locks_read_proc},
 692                 {"execdomains", execdomains_read_proc},
 693                 {NULL,}
 694         };
 695         for (p = simple_ones; p->name; p++)
 696                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 697
 698         proc_symlink("mounts", NULL, "self/mounts");
 699
 700         /* And now for trickier ones */
 701         entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 702         if (entry)
 703                 entry->proc_fops = &proc_kmsg_operations;
 704         create_seq_entry("devices", 0, &proc_devinfo_operations);
 705         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 706         create_seq_entry("partitions", 0, &proc_partitions_operations);
 707         create_seq_entry("stat", 0, &proc_stat_operations);
 708         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 709 #ifdef CONFIG_SLAB
 710         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 711 #ifdef CONFIG_DEBUG_SLAB_LEAK
 712         create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
 713 #endif
 714 #endif
 715         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 716         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 717         create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
 718         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 719 #ifdef CONFIG_MODULES
 720         create_seq_entry("modules", 0, &proc_modules_operations);
 721 #endif
 722 #ifdef CONFIG_SCHEDSTATS
 723         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
 724 #endif
 725 #ifdef CONFIG_PROC_KCORE
 726         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 727         if (proc_root_kcore) {
 728                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 729                 proc_root_kcore->size =
 730                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 731         }
 732 #endif
 733 #ifdef CONFIG_PROC_VMCORE
 734         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
 735         if (proc_vmcore)
 736                 proc_vmcore->proc_fops = &proc_vmcore_operations;
 737 #endif
 738 #ifdef CONFIG_MAGIC_SYSRQ
 739         entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 740         if (entry)
 741                 entry->proc_fops = &proc_sysrq_trigger_operations;
 742 #endif
 743 }