err.no Git - linux-2.6/blob - 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/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/seq_file.h>
  39 #include <linux/times.h>
  40 #include <linux/profile.h>
  41 #include <linux/utsname.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/pid_namespace.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 #define LOAD_INT(x) ((x) >> FSHIFT)
  57 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
  58 /*
  59  * Warning: stuff below (imported functions) assumes that its output will fit
  60  * into one page. For some of those functions it may be wrong. Moreover, we
  61  * have a way to deal with that gracefully. Right now I used straightforward
  62  * wrappers, but this needs further analysis wrt potential overflows.
  63  */
  64 extern int get_hardware_list(char *);
  65 extern int get_stram_list(char *);
  66 extern int get_filesystem_list(char *);
  67 extern int get_exec_domain_list(char *);
  68 extern int get_dma_list(char *);
  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,
  95                 task_active_pid_ns(current)->last_pid);
  96         return proc_calc_metrics(page, start, off, count, eof, len);
  97 }
  98
  99 static int uptime_read_proc(char *page, char **start, off_t off,
 100                                  int count, int *eof, void *data)
 101 {
 102         struct timespec uptime;
 103         struct timespec idle;
 104         int len;
 105         cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
 106
 107         do_posix_clock_monotonic_gettime(&uptime);
 108         monotonic_to_bootbased(&uptime);
 109         cputime_to_timespec(idletime, &idle);
 110         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 111                         (unsigned long) uptime.tv_sec,
 112                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
 113                         (unsigned long) idle.tv_sec,
 114                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
 115
 116         return proc_calc_metrics(page, start, off, count, eof, len);
 117 }
 118
 119 static int meminfo_read_proc(char *page, char **start, off_t off,
 120                                  int count, int *eof, void *data)
 121 {
 122         struct sysinfo i;
 123         int len;
 124         unsigned long committed;
 125         unsigned long allowed;
 126         struct vmalloc_info vmi;
 127         long cached;
 128
 129 /*
 130  * display in kilobytes.
 131  */
 132 #define K(x) ((x) << (PAGE_SHIFT - 10))
 133         si_meminfo(&i);
 134         si_swapinfo(&i);
 135         committed = atomic_read(&vm_committed_space);
 136         allowed = ((totalram_pages - hugetlb_total_pages())
 137                 * sysctl_overcommit_ratio / 100) + total_swap_pages;
 138
 139         cached = global_page_state(NR_FILE_PAGES) -
 140                         total_swapcache_pages - i.bufferram;
 141         if (cached < 0)
 142                 cached = 0;
 143
 144         get_vmalloc_info(&vmi);
 145
 146         /*
 147          * Tagged format, for easy grepping and expansion.
 148          */
 149         len = sprintf(page,
 150                 "MemTotal:     %8lu kB\n"
 151                 "MemFree:      %8lu kB\n"
 152                 "Buffers:      %8lu kB\n"
 153                 "Cached:       %8lu kB\n"
 154                 "SwapCached:   %8lu kB\n"
 155                 "Active:       %8lu kB\n"
 156                 "Inactive:     %8lu kB\n"
 157 #ifdef CONFIG_HIGHMEM
 158                 "HighTotal:    %8lu kB\n"
 159                 "HighFree:     %8lu kB\n"
 160                 "LowTotal:     %8lu kB\n"
 161                 "LowFree:      %8lu kB\n"
 162 #endif
 163                 "SwapTotal:    %8lu kB\n"
 164                 "SwapFree:     %8lu kB\n"
 165                 "Dirty:        %8lu kB\n"
 166                 "Writeback:    %8lu kB\n"
 167                 "AnonPages:    %8lu kB\n"
 168                 "Mapped:       %8lu kB\n"
 169                 "Slab:         %8lu kB\n"
 170                 "SReclaimable: %8lu kB\n"
 171                 "SUnreclaim:   %8lu kB\n"
 172                 "PageTables:   %8lu kB\n"
 173                 "NFS_Unstable: %8lu kB\n"
 174                 "Bounce:       %8lu kB\n"
 175                 "CommitLimit:  %8lu kB\n"
 176                 "Committed_AS: %8lu kB\n"
 177                 "VmallocTotal: %8lu kB\n"
 178                 "VmallocUsed:  %8lu kB\n"
 179                 "VmallocChunk: %8lu kB\n",
 180                 K(i.totalram),
 181                 K(i.freeram),
 182                 K(i.bufferram),
 183                 K(cached),
 184                 K(total_swapcache_pages),
 185                 K(global_page_state(NR_ACTIVE)),
 186                 K(global_page_state(NR_INACTIVE)),
 187 #ifdef CONFIG_HIGHMEM
 188                 K(i.totalhigh),
 189                 K(i.freehigh),
 190                 K(i.totalram-i.totalhigh),
 191                 K(i.freeram-i.freehigh),
 192 #endif
 193                 K(i.totalswap),
 194                 K(i.freeswap),
 195                 K(global_page_state(NR_FILE_DIRTY)),
 196                 K(global_page_state(NR_WRITEBACK)),
 197                 K(global_page_state(NR_ANON_PAGES)),
 198                 K(global_page_state(NR_FILE_MAPPED)),
 199                 K(global_page_state(NR_SLAB_RECLAIMABLE) +
 200                                 global_page_state(NR_SLAB_UNRECLAIMABLE)),
 201                 K(global_page_state(NR_SLAB_RECLAIMABLE)),
 202                 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
 203                 K(global_page_state(NR_PAGETABLE)),
 204                 K(global_page_state(NR_UNSTABLE_NFS)),
 205                 K(global_page_state(NR_BOUNCE)),
 206                 K(allowed),
 207                 K(committed),
 208                 (unsigned long)VMALLOC_TOTAL >> 10,
 209                 vmi.used >> 10,
 210                 vmi.largest_chunk >> 10
 211                 );
 212
 213                 len += hugetlb_report_meminfo(page + len);
 214
 215         return proc_calc_metrics(page, start, off, count, eof, len);
 216 #undef K
 217 }
 218
 219 extern struct seq_operations fragmentation_op;
 220 static int fragmentation_open(struct inode *inode, struct file *file)
 221 {
 222         (void)inode;
 223         return seq_open(file, &fragmentation_op);
 224 }
 225
 226 static const struct file_operations fragmentation_file_operations = {
 227         .open           = fragmentation_open,
 228         .read           = seq_read,
 229         .llseek         = seq_lseek,
 230         .release        = seq_release,
 231 };
 232
 233 extern struct seq_operations pagetypeinfo_op;
 234 static int pagetypeinfo_open(struct inode *inode, struct file *file)
 235 {
 236         return seq_open(file, &pagetypeinfo_op);
 237 }
 238
 239 static const struct file_operations pagetypeinfo_file_ops = {
 240         .open           = pagetypeinfo_open,
 241         .read           = seq_read,
 242         .llseek         = seq_lseek,
 243         .release        = seq_release,
 244 };
 245
 246 extern struct seq_operations zoneinfo_op;
 247 static int zoneinfo_open(struct inode *inode, struct file *file)
 248 {
 249         return seq_open(file, &zoneinfo_op);
 250 }
 251
 252 static const struct file_operations proc_zoneinfo_file_operations = {
 253         .open           = zoneinfo_open,
 254         .read           = seq_read,
 255         .llseek         = seq_lseek,
 256         .release        = seq_release,
 257 };
 258
 259 static int version_read_proc(char *page, char **start, off_t off,
 260                                  int count, int *eof, void *data)
 261 {
 262         int len;
 263
 264         len = snprintf(page, PAGE_SIZE, linux_proc_banner,
 265                 utsname()->sysname,
 266                 utsname()->release,
 267                 utsname()->version);
 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
 277 static const struct file_operations proc_cpuinfo_operations = {
 278         .open           = cpuinfo_open,
 279         .read           = seq_read,
 280         .llseek         = seq_lseek,
 281         .release        = seq_release,
 282 };
 283
 284 static int devinfo_show(struct seq_file *f, void *v)
 285 {
 286         int i = *(loff_t *) v;
 287
 288         if (i < CHRDEV_MAJOR_HASH_SIZE) {
 289                 if (i == 0)
 290                         seq_printf(f, "Character devices:\n");
 291                 chrdev_show(f, i);
 292         }
 293 #ifdef CONFIG_BLOCK
 294         else {
 295                 i -= CHRDEV_MAJOR_HASH_SIZE;
 296                 if (i == 0)
 297                         seq_printf(f, "\nBlock devices:\n");
 298                 blkdev_show(f, i);
 299         }
 300 #endif
 301         return 0;
 302 }
 303
 304 static void *devinfo_start(struct seq_file *f, loff_t *pos)
 305 {
 306         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 307                 return pos;
 308         return NULL;
 309 }
 310
 311 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
 312 {
 313         (*pos)++;
 314         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
 315                 return NULL;
 316         return pos;
 317 }
 318
 319 static void devinfo_stop(struct seq_file *f, void *v)
 320 {
 321         /* Nothing to do */
 322 }
 323
 324 static struct seq_operations devinfo_ops = {
 325         .start = devinfo_start,
 326         .next  = devinfo_next,
 327         .stop  = devinfo_stop,
 328         .show  = devinfo_show
 329 };
 330
 331 static int devinfo_open(struct inode *inode, struct file *filp)
 332 {
 333         return seq_open(filp, &devinfo_ops);
 334 }
 335
 336 static const struct file_operations proc_devinfo_operations = {
 337         .open           = devinfo_open,
 338         .read           = seq_read,
 339         .llseek         = seq_lseek,
 340         .release        = seq_release,
 341 };
 342
 343 extern struct seq_operations vmstat_op;
 344 static int vmstat_open(struct inode *inode, struct file *file)
 345 {
 346         return seq_open(file, &vmstat_op);
 347 }
 348 static const struct file_operations proc_vmstat_file_operations = {
 349         .open           = vmstat_open,
 350         .read           = seq_read,
 351         .llseek         = seq_lseek,
 352         .release        = seq_release,
 353 };
 354
 355 #ifdef CONFIG_PROC_HARDWARE
 356 static int hardware_read_proc(char *page, char **start, off_t off,
 357                                  int count, int *eof, void *data)
 358 {
 359         int len = get_hardware_list(page);
 360         return proc_calc_metrics(page, start, off, count, eof, len);
 361 }
 362 #endif
 363
 364 #ifdef CONFIG_STRAM_PROC
 365 static int stram_read_proc(char *page, char **start, off_t off,
 366                                  int count, int *eof, void *data)
 367 {
 368         int len = get_stram_list(page);
 369         return proc_calc_metrics(page, start, off, count, eof, len);
 370 }
 371 #endif
 372
 373 #ifdef CONFIG_BLOCK
 374 extern struct seq_operations partitions_op;
 375 static int partitions_open(struct inode *inode, struct file *file)
 376 {
 377         return seq_open(file, &partitions_op);
 378 }
 379 static const struct file_operations proc_partitions_operations = {
 380         .open           = partitions_open,
 381         .read           = seq_read,
 382         .llseek         = seq_lseek,
 383         .release        = seq_release,
 384 };
 385
 386 extern struct seq_operations diskstats_op;
 387 static int diskstats_open(struct inode *inode, struct file *file)
 388 {
 389         return seq_open(file, &diskstats_op);
 390 }
 391 static const struct file_operations proc_diskstats_operations = {
 392         .open           = diskstats_open,
 393         .read           = seq_read,
 394         .llseek         = seq_lseek,
 395         .release        = seq_release,
 396 };
 397 #endif
 398
 399 #ifdef CONFIG_MODULES
 400 extern struct seq_operations modules_op;
 401 static int modules_open(struct inode *inode, struct file *file)
 402 {
 403         return seq_open(file, &modules_op);
 404 }
 405 static const struct file_operations proc_modules_operations = {
 406         .open           = modules_open,
 407         .read           = seq_read,
 408         .llseek         = seq_lseek,
 409         .release        = seq_release,
 410 };
 411 #endif
 412
 413 #ifdef CONFIG_SLAB
 414 static int slabinfo_open(struct inode *inode, struct file *file)
 415 {
 416         return seq_open(file, &slabinfo_op);
 417 }
 418 static const struct file_operations proc_slabinfo_operations = {
 419         .open           = slabinfo_open,
 420         .read           = seq_read,
 421         .write          = slabinfo_write,
 422         .llseek         = seq_lseek,
 423         .release        = seq_release,
 424 };
 425
 426 #ifdef CONFIG_DEBUG_SLAB_LEAK
 427 extern struct seq_operations slabstats_op;
 428 static int slabstats_open(struct inode *inode, struct file *file)
 429 {
 430         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
 431         int ret = -ENOMEM;
 432         if (n) {
 433                 ret = seq_open(file, &slabstats_op);
 434                 if (!ret) {
 435                         struct seq_file *m = file->private_data;
 436                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
 437                         m->private = n;
 438                         n = NULL;
 439                 }
 440                 kfree(n);
 441         }
 442         return ret;
 443 }
 444
 445 static const struct file_operations proc_slabstats_operations = {
 446         .open           = slabstats_open,
 447         .read           = seq_read,
 448         .llseek         = seq_lseek,
 449         .release        = seq_release_private,
 450 };
 451 #endif
 452 #endif
 453
 454 #ifdef CONFIG_SLUB
 455 static int slabinfo_open(struct inode *inode, struct file *file)
 456 {
 457         return seq_open(file, &slabinfo_op);
 458 }
 459
 460 static const struct file_operations proc_slabinfo_operations = {
 461         .open           = slabinfo_open,
 462         .read           = seq_read,
 463         .llseek         = seq_lseek,
 464         .release        = seq_release,
 465 };
 466 #endif
 467
 468 static int show_stat(struct seq_file *p, void *v)
 469 {
 470         int i;
 471         unsigned long jif;
 472         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
 473         cputime64_t guest;
 474         u64 sum = 0;
 475         struct timespec boottime;
 476         unsigned int *per_irq_sum;
 477
 478         per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL);
 479         if (!per_irq_sum)
 480                 return -ENOMEM;
 481
 482         user = nice = system = idle = iowait =
 483                 irq = softirq = steal = cputime64_zero;
 484         guest = cputime64_zero;
 485         getboottime(&boottime);
 486         jif = boottime.tv_sec;
 487
 488         for_each_possible_cpu(i) {
 489                 int j;
 490
 491                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
 492                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
 493                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
 494                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
 495                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
 496                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
 497                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
 498                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
 499                 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
 500                 for (j = 0; j < NR_IRQS; j++) {
 501                         unsigned int temp = kstat_cpu(i).irqs[j];
 502                         sum += temp;
 503                         per_irq_sum[j] += temp;
 504                 }
 505         }
 506
 507         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
 508                 (unsigned long long)cputime64_to_clock_t(user),
 509                 (unsigned long long)cputime64_to_clock_t(nice),
 510                 (unsigned long long)cputime64_to_clock_t(system),
 511                 (unsigned long long)cputime64_to_clock_t(idle),
 512                 (unsigned long long)cputime64_to_clock_t(iowait),
 513                 (unsigned long long)cputime64_to_clock_t(irq),
 514                 (unsigned long long)cputime64_to_clock_t(softirq),
 515                 (unsigned long long)cputime64_to_clock_t(steal),
 516                 (unsigned long long)cputime64_to_clock_t(guest));
 517         for_each_online_cpu(i) {
 518
 519                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
 520                 user = kstat_cpu(i).cpustat.user;
 521                 nice = kstat_cpu(i).cpustat.nice;
 522                 system = kstat_cpu(i).cpustat.system;
 523                 idle = kstat_cpu(i).cpustat.idle;
 524                 iowait = kstat_cpu(i).cpustat.iowait;
 525                 irq = kstat_cpu(i).cpustat.irq;
 526                 softirq = kstat_cpu(i).cpustat.softirq;
 527                 steal = kstat_cpu(i).cpustat.steal;
 528                 guest = kstat_cpu(i).cpustat.guest;
 529                 seq_printf(p,
 530                         "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
 531                         i,
 532                         (unsigned long long)cputime64_to_clock_t(user),
 533                         (unsigned long long)cputime64_to_clock_t(nice),
 534                         (unsigned long long)cputime64_to_clock_t(system),
 535                         (unsigned long long)cputime64_to_clock_t(idle),
 536                         (unsigned long long)cputime64_to_clock_t(iowait),
 537                         (unsigned long long)cputime64_to_clock_t(irq),
 538                         (unsigned long long)cputime64_to_clock_t(softirq),
 539                         (unsigned long long)cputime64_to_clock_t(steal),
 540                         (unsigned long long)cputime64_to_clock_t(guest));
 541         }
 542         seq_printf(p, "intr %llu", (unsigned long long)sum);
 543
 544         for (i = 0; i < NR_IRQS; i++)
 545                 seq_printf(p, " %u", per_irq_sum[i]);
 546
 547         seq_printf(p,
 548                 "\nctxt %llu\n"
 549                 "btime %lu\n"
 550                 "processes %lu\n"
 551                 "procs_running %lu\n"
 552                 "procs_blocked %lu\n",
 553                 nr_context_switches(),
 554                 (unsigned long)jif,
 555                 total_forks,
 556                 nr_running(),
 557                 nr_iowait());
 558
 559         kfree(per_irq_sum);
 560         return 0;
 561 }
 562
 563 static int stat_open(struct inode *inode, struct file *file)
 564 {
 565         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
 566         char *buf;
 567         struct seq_file *m;
 568         int res;
 569
 570         /* don't ask for more than the kmalloc() max size, currently 128 KB */
 571         if (size > 128 * 1024)
 572                 size = 128 * 1024;
 573         buf = kmalloc(size, GFP_KERNEL);
 574         if (!buf)
 575                 return -ENOMEM;
 576
 577         res = single_open(file, show_stat, NULL);
 578         if (!res) {
 579                 m = file->private_data;
 580                 m->buf = buf;
 581                 m->size = size;
 582         } else
 583                 kfree(buf);
 584         return res;
 585 }
 586 static const struct file_operations proc_stat_operations = {
 587         .open           = stat_open,
 588         .read           = seq_read,
 589         .llseek         = seq_lseek,
 590         .release        = single_release,
 591 };
 592
 593 /*
 594  * /proc/interrupts
 595  */
 596 static void *int_seq_start(struct seq_file *f, loff_t *pos)
 597 {
 598         return (*pos <= NR_IRQS) ? pos : NULL;
 599 }
 600
 601 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
 602 {
 603         (*pos)++;
 604         if (*pos > NR_IRQS)
 605                 return NULL;
 606         return pos;
 607 }
 608
 609 static void int_seq_stop(struct seq_file *f, void *v)
 610 {
 611         /* Nothing to do */
 612 }
 613
 614
 615 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
 616 static struct seq_operations int_seq_ops = {
 617         .start = int_seq_start,
 618         .next  = int_seq_next,
 619         .stop  = int_seq_stop,
 620         .show  = show_interrupts
 621 };
 622
 623 static int interrupts_open(struct inode *inode, struct file *filp)
 624 {
 625         return seq_open(filp, &int_seq_ops);
 626 }
 627
 628 static const struct file_operations proc_interrupts_operations = {
 629         .open           = interrupts_open,
 630         .read           = seq_read,
 631         .llseek         = seq_lseek,
 632         .release        = seq_release,
 633 };
 634
 635 static int filesystems_read_proc(char *page, char **start, off_t off,
 636                                  int count, int *eof, void *data)
 637 {
 638         int len = get_filesystem_list(page);
 639         return proc_calc_metrics(page, start, off, count, eof, len);
 640 }
 641
 642 static int cmdline_read_proc(char *page, char **start, off_t off,
 643                                  int count, int *eof, void *data)
 644 {
 645         int len;
 646
 647         len = sprintf(page, "%s\n", saved_command_line);
 648         return proc_calc_metrics(page, start, off, count, eof, len);
 649 }
 650
 651 static int locks_open(struct inode *inode, struct file *filp)
 652 {
 653         return seq_open(filp, &locks_seq_operations);
 654 }
 655
 656 static const struct file_operations proc_locks_operations = {
 657         .open           = locks_open,
 658         .read           = seq_read,
 659         .llseek         = seq_lseek,
 660         .release        = seq_release,
 661 };
 662
 663 static int execdomains_read_proc(char *page, char **start, off_t off,
 664                                  int count, int *eof, void *data)
 665 {
 666         int len = get_exec_domain_list(page);
 667         return proc_calc_metrics(page, start, off, count, eof, len);
 668 }
 669
 670 #ifdef CONFIG_MAGIC_SYSRQ
 671 /*
 672  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
 673  */
 674 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
 675                                    size_t count, loff_t *ppos)
 676 {
 677         if (count) {
 678                 char c;
 679
 680                 if (get_user(c, buf))
 681                         return -EFAULT;
 682                 __handle_sysrq(c, NULL, 0);
 683         }
 684         return count;
 685 }
 686
 687 static const struct file_operations proc_sysrq_trigger_operations = {
 688         .write          = write_sysrq_trigger,
 689 };
 690 #endif
 691
 692 struct proc_dir_entry *proc_root_kcore;
 693
 694 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
 695 {
 696         struct proc_dir_entry *entry;
 697         entry = create_proc_entry(name, mode, NULL);
 698         if (entry)
 699                 entry->proc_fops = f;
 700 }
 701
 702 void __init proc_misc_init(void)
 703 {
 704         static struct {
 705                 char *name;
 706                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
 707         } *p, simple_ones[] = {
 708                 {"loadavg",     loadavg_read_proc},
 709                 {"uptime",      uptime_read_proc},
 710                 {"meminfo",     meminfo_read_proc},
 711                 {"version",     version_read_proc},
 712 #ifdef CONFIG_PROC_HARDWARE
 713                 {"hardware",    hardware_read_proc},
 714 #endif
 715 #ifdef CONFIG_STRAM_PROC
 716                 {"stram",       stram_read_proc},
 717 #endif
 718                 {"filesystems", filesystems_read_proc},
 719                 {"cmdline",     cmdline_read_proc},
 720                 {"execdomains", execdomains_read_proc},
 721                 {NULL,}
 722         };
 723         for (p = simple_ones; p->name; p++)
 724                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
 725
 726         proc_symlink("mounts", NULL, "self/mounts");
 727
 728         /* And now for trickier ones */
 729 #ifdef CONFIG_PRINTK
 730         {
 731                 struct proc_dir_entry *entry;
 732                 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
 733                 if (entry)
 734                         entry->proc_fops = &proc_kmsg_operations;
 735         }
 736 #endif
 737         create_seq_entry("locks", 0, &proc_locks_operations);
 738         create_seq_entry("devices", 0, &proc_devinfo_operations);
 739         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
 740 #ifdef CONFIG_BLOCK
 741         create_seq_entry("partitions", 0, &proc_partitions_operations);
 742 #endif
 743         create_seq_entry("stat", 0, &proc_stat_operations);
 744         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 745 #ifdef CONFIG_SLAB
 746         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
 747 #ifdef CONFIG_DEBUG_SLAB_LEAK
 748         create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
 749 #endif
 750 #endif
 751 #ifdef CONFIG_SLUB
 752         create_seq_entry("slabinfo", S_IWUSR|S_IRUGO, &proc_slabinfo_operations);
 753 #endif
 754         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
 755         create_seq_entry("pagetypeinfo", S_IRUGO, &pagetypeinfo_file_ops);
 756         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
 757         create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
 758 #ifdef CONFIG_BLOCK
 759         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
 760 #endif
 761 #ifdef CONFIG_MODULES
 762         create_seq_entry("modules", 0, &proc_modules_operations);
 763 #endif
 764 #ifdef CONFIG_SCHEDSTATS
 765         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
 766 #endif
 767 #ifdef CONFIG_PROC_KCORE
 768         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
 769         if (proc_root_kcore) {
 770                 proc_root_kcore->proc_fops = &proc_kcore_operations;
 771                 proc_root_kcore->size =
 772                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
 773         }
 774 #endif
 775 #ifdef CONFIG_PROC_VMCORE
 776         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
 777         if (proc_vmcore)
 778                 proc_vmcore->proc_fops = &proc_vmcore_operations;
 779 #endif
 780 #ifdef CONFIG_MAGIC_SYSRQ
 781         {
 782                 struct proc_dir_entry *entry;
 783                 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
 784                 if (entry)
 785                         entry->proc_fops = &proc_sysrq_trigger_operations;
 786         }
 787 #endif
 788 }