report the per-irq statistics on all arches
[linux-2.6.git] / 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, current->nsproxy->pid_ns->last_pid);
95         return proc_calc_metrics(page, start, off, count, eof, len);
96 }
97
98 static int uptime_read_proc(char *page, char **start, off_t off,
99                                  int count, int *eof, void *data)
100 {
101         struct timespec uptime;
102         struct timespec idle;
103         int len;
104         cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
105
106         do_posix_clock_monotonic_gettime(&uptime);
107         monotonic_to_bootbased(&uptime);
108         cputime_to_timespec(idletime, &idle);
109         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
110                         (unsigned long) uptime.tv_sec,
111                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
112                         (unsigned long) idle.tv_sec,
113                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
114
115         return proc_calc_metrics(page, start, off, count, eof, len);
116 }
117
118 static int meminfo_read_proc(char *page, char **start, off_t off,
119                                  int count, int *eof, void *data)
120 {
121         struct sysinfo i;
122         int len;
123         unsigned long committed;
124         unsigned long allowed;
125         struct vmalloc_info vmi;
126         long cached;
127
128 /*
129  * display in kilobytes.
130  */
131 #define K(x) ((x) << (PAGE_SHIFT - 10))
132         si_meminfo(&i);
133         si_swapinfo(&i);
134         committed = atomic_read(&vm_committed_space);
135         allowed = ((totalram_pages - hugetlb_total_pages())
136                 * sysctl_overcommit_ratio / 100) + total_swap_pages;
137
138         cached = global_page_state(NR_FILE_PAGES) -
139                         total_swapcache_pages - i.bufferram;
140         if (cached < 0)
141                 cached = 0;
142
143         get_vmalloc_info(&vmi);
144
145         /*
146          * Tagged format, for easy grepping and expansion.
147          */
148         len = sprintf(page,
149                 "MemTotal:     %8lu kB\n"
150                 "MemFree:      %8lu kB\n"
151                 "Buffers:      %8lu kB\n"
152                 "Cached:       %8lu kB\n"
153                 "SwapCached:   %8lu kB\n"
154                 "Active:       %8lu kB\n"
155                 "Inactive:     %8lu kB\n"
156 #ifdef CONFIG_HIGHMEM
157                 "HighTotal:    %8lu kB\n"
158                 "HighFree:     %8lu kB\n"
159                 "LowTotal:     %8lu kB\n"
160                 "LowFree:      %8lu kB\n"
161 #endif
162                 "SwapTotal:    %8lu kB\n"
163                 "SwapFree:     %8lu kB\n"
164                 "Dirty:        %8lu kB\n"
165                 "Writeback:    %8lu kB\n"
166                 "AnonPages:    %8lu kB\n"
167                 "Mapped:       %8lu kB\n"
168                 "Slab:         %8lu kB\n"
169                 "SReclaimable: %8lu kB\n"
170                 "SUnreclaim:   %8lu kB\n"
171                 "PageTables:   %8lu kB\n"
172                 "NFS_Unstable: %8lu kB\n"
173                 "Bounce:       %8lu kB\n"
174                 "CommitLimit:  %8lu kB\n"
175                 "Committed_AS: %8lu kB\n"
176                 "VmallocTotal: %8lu kB\n"
177                 "VmallocUsed:  %8lu kB\n"
178                 "VmallocChunk: %8lu kB\n",
179                 K(i.totalram),
180                 K(i.freeram),
181                 K(i.bufferram),
182                 K(cached),
183                 K(total_swapcache_pages),
184                 K(global_page_state(NR_ACTIVE)),
185                 K(global_page_state(NR_INACTIVE)),
186 #ifdef CONFIG_HIGHMEM
187                 K(i.totalhigh),
188                 K(i.freehigh),
189                 K(i.totalram-i.totalhigh),
190                 K(i.freeram-i.freehigh),
191 #endif
192                 K(i.totalswap),
193                 K(i.freeswap),
194                 K(global_page_state(NR_FILE_DIRTY)),
195                 K(global_page_state(NR_WRITEBACK)),
196                 K(global_page_state(NR_ANON_PAGES)),
197                 K(global_page_state(NR_FILE_MAPPED)),
198                 K(global_page_state(NR_SLAB_RECLAIMABLE) +
199                                 global_page_state(NR_SLAB_UNRECLAIMABLE)),
200                 K(global_page_state(NR_SLAB_RECLAIMABLE)),
201                 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
202                 K(global_page_state(NR_PAGETABLE)),
203                 K(global_page_state(NR_UNSTABLE_NFS)),
204                 K(global_page_state(NR_BOUNCE)),
205                 K(allowed),
206                 K(committed),
207                 (unsigned long)VMALLOC_TOTAL >> 10,
208                 vmi.used >> 10,
209                 vmi.largest_chunk >> 10
210                 );
211
212                 len += hugetlb_report_meminfo(page + len);
213
214         return proc_calc_metrics(page, start, off, count, eof, len);
215 #undef K
216 }
217
218 extern struct seq_operations fragmentation_op;
219 static int fragmentation_open(struct inode *inode, struct file *file)
220 {
221         (void)inode;
222         return seq_open(file, &fragmentation_op);
223 }
224
225 static const struct file_operations fragmentation_file_operations = {
226         .open           = fragmentation_open,
227         .read           = seq_read,
228         .llseek         = seq_lseek,
229         .release        = seq_release,
230 };
231
232 extern struct seq_operations pagetypeinfo_op;
233 static int pagetypeinfo_open(struct inode *inode, struct file *file)
234 {
235         return seq_open(file, &pagetypeinfo_op);
236 }
237
238 static const struct file_operations pagetypeinfo_file_ops = {
239         .open           = pagetypeinfo_open,
240         .read           = seq_read,
241         .llseek         = seq_lseek,
242         .release        = seq_release,
243 };
244
245 extern struct seq_operations zoneinfo_op;
246 static int zoneinfo_open(struct inode *inode, struct file *file)
247 {
248         return seq_open(file, &zoneinfo_op);
249 }
250
251 static const struct file_operations proc_zoneinfo_file_operations = {
252         .open           = zoneinfo_open,
253         .read           = seq_read,
254         .llseek         = seq_lseek,
255         .release        = seq_release,
256 };
257
258 static int version_read_proc(char *page, char **start, off_t off,
259                                  int count, int *eof, void *data)
260 {
261         int len;
262
263         len = snprintf(page, PAGE_SIZE, linux_proc_banner,
264                 utsname()->sysname,
265                 utsname()->release,
266                 utsname()->version);
267         return proc_calc_metrics(page, start, off, count, eof, len);
268 }
269
270 extern struct seq_operations cpuinfo_op;
271 static int cpuinfo_open(struct inode *inode, struct file *file)
272 {
273         return seq_open(file, &cpuinfo_op);
274 }
275
276 static const struct file_operations proc_cpuinfo_operations = {
277         .open           = cpuinfo_open,
278         .read           = seq_read,
279         .llseek         = seq_lseek,
280         .release        = seq_release,
281 };
282
283 static int devinfo_show(struct seq_file *f, void *v)
284 {
285         int i = *(loff_t *) v;
286
287         if (i < CHRDEV_MAJOR_HASH_SIZE) {
288                 if (i == 0)
289                         seq_printf(f, "Character devices:\n");
290                 chrdev_show(f, i);
291         }
292 #ifdef CONFIG_BLOCK
293         else {
294                 i -= CHRDEV_MAJOR_HASH_SIZE;
295                 if (i == 0)
296                         seq_printf(f, "\nBlock devices:\n");
297                 blkdev_show(f, i);
298         }
299 #endif
300         return 0;
301 }
302
303 static void *devinfo_start(struct seq_file *f, loff_t *pos)
304 {
305         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
306                 return pos;
307         return NULL;
308 }
309
310 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
311 {
312         (*pos)++;
313         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
314                 return NULL;
315         return pos;
316 }
317
318 static void devinfo_stop(struct seq_file *f, void *v)
319 {
320         /* Nothing to do */
321 }
322
323 static struct seq_operations devinfo_ops = {
324         .start = devinfo_start,
325         .next  = devinfo_next,
326         .stop  = devinfo_stop,
327         .show  = devinfo_show
328 };
329
330 static int devinfo_open(struct inode *inode, struct file *filp)
331 {
332         return seq_open(filp, &devinfo_ops);
333 }
334
335 static const struct file_operations proc_devinfo_operations = {
336         .open           = devinfo_open,
337         .read           = seq_read,
338         .llseek         = seq_lseek,
339         .release        = seq_release,
340 };
341
342 extern struct seq_operations vmstat_op;
343 static int vmstat_open(struct inode *inode, struct file *file)
344 {
345         return seq_open(file, &vmstat_op);
346 }
347 static const struct file_operations proc_vmstat_file_operations = {
348         .open           = vmstat_open,
349         .read           = seq_read,
350         .llseek         = seq_lseek,
351         .release        = seq_release,
352 };
353
354 #ifdef CONFIG_PROC_HARDWARE
355 static int hardware_read_proc(char *page, char **start, off_t off,
356                                  int count, int *eof, void *data)
357 {
358         int len = get_hardware_list(page);
359         return proc_calc_metrics(page, start, off, count, eof, len);
360 }
361 #endif
362
363 #ifdef CONFIG_STRAM_PROC
364 static int stram_read_proc(char *page, char **start, off_t off,
365                                  int count, int *eof, void *data)
366 {
367         int len = get_stram_list(page);
368         return proc_calc_metrics(page, start, off, count, eof, len);
369 }
370 #endif
371
372 #ifdef CONFIG_BLOCK
373 extern struct seq_operations partitions_op;
374 static int partitions_open(struct inode *inode, struct file *file)
375 {
376         return seq_open(file, &partitions_op);
377 }
378 static const struct file_operations proc_partitions_operations = {
379         .open           = partitions_open,
380         .read           = seq_read,
381         .llseek         = seq_lseek,
382         .release        = seq_release,
383 };
384
385 extern struct seq_operations diskstats_op;
386 static int diskstats_open(struct inode *inode, struct file *file)
387 {
388         return seq_open(file, &diskstats_op);
389 }
390 static const struct file_operations proc_diskstats_operations = {
391         .open           = diskstats_open,
392         .read           = seq_read,
393         .llseek         = seq_lseek,
394         .release        = seq_release,
395 };
396 #endif
397
398 #ifdef CONFIG_MODULES
399 extern struct seq_operations modules_op;
400 static int modules_open(struct inode *inode, struct file *file)
401 {
402         return seq_open(file, &modules_op);
403 }
404 static const struct file_operations proc_modules_operations = {
405         .open           = modules_open,
406         .read           = seq_read,
407         .llseek         = seq_lseek,
408         .release        = seq_release,
409 };
410 #endif
411
412 #ifdef CONFIG_SLAB
413 static int slabinfo_open(struct inode *inode, struct file *file)
414 {
415         return seq_open(file, &slabinfo_op);
416 }
417 static const struct file_operations proc_slabinfo_operations = {
418         .open           = slabinfo_open,
419         .read           = seq_read,
420         .write          = slabinfo_write,
421         .llseek         = seq_lseek,
422         .release        = seq_release,
423 };
424
425 #ifdef CONFIG_DEBUG_SLAB_LEAK
426 extern struct seq_operations slabstats_op;
427 static int slabstats_open(struct inode *inode, struct file *file)
428 {
429         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
430         int ret = -ENOMEM;
431         if (n) {
432                 ret = seq_open(file, &slabstats_op);
433                 if (!ret) {
434                         struct seq_file *m = file->private_data;
435                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
436                         m->private = n;
437                         n = NULL;
438                 }
439                 kfree(n);
440         }
441         return ret;
442 }
443
444 static const struct file_operations proc_slabstats_operations = {
445         .open           = slabstats_open,
446         .read           = seq_read,
447         .llseek         = seq_lseek,
448         .release        = seq_release_private,
449 };
450 #endif
451 #endif
452
453 static int show_stat(struct seq_file *p, void *v)
454 {
455         int i;
456         unsigned long jif;
457         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
458         cputime64_t guest;
459         u64 sum = 0;
460         struct timespec boottime;
461         unsigned int *per_irq_sum;
462
463         per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL);
464         if (!per_irq_sum)
465                 return -ENOMEM;
466
467         user = nice = system = idle = iowait =
468                 irq = softirq = steal = cputime64_zero;
469         guest = cputime64_zero;
470         getboottime(&boottime);
471         jif = boottime.tv_sec;
472
473         for_each_possible_cpu(i) {
474                 int j;
475
476                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
477                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
478                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
479                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
480                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
481                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
482                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
483                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
484                 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
485                 for (j = 0; j < NR_IRQS; j++) {
486                         unsigned int temp = kstat_cpu(i).irqs[j];
487                         sum += temp;
488                         per_irq_sum[j] += temp;
489                 }
490         }
491
492         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
493                 (unsigned long long)cputime64_to_clock_t(user),
494                 (unsigned long long)cputime64_to_clock_t(nice),
495                 (unsigned long long)cputime64_to_clock_t(system),
496                 (unsigned long long)cputime64_to_clock_t(idle),
497                 (unsigned long long)cputime64_to_clock_t(iowait),
498                 (unsigned long long)cputime64_to_clock_t(irq),
499                 (unsigned long long)cputime64_to_clock_t(softirq),
500                 (unsigned long long)cputime64_to_clock_t(steal),
501                 (unsigned long long)cputime64_to_clock_t(guest));
502         for_each_online_cpu(i) {
503
504                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
505                 user = kstat_cpu(i).cpustat.user;
506                 nice = kstat_cpu(i).cpustat.nice;
507                 system = kstat_cpu(i).cpustat.system;
508                 idle = kstat_cpu(i).cpustat.idle;
509                 iowait = kstat_cpu(i).cpustat.iowait;
510                 irq = kstat_cpu(i).cpustat.irq;
511                 softirq = kstat_cpu(i).cpustat.softirq;
512                 steal = kstat_cpu(i).cpustat.steal;
513                 guest = kstat_cpu(i).cpustat.guest;
514                 seq_printf(p,
515                         "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
516                         i,
517                         (unsigned long long)cputime64_to_clock_t(user),
518                         (unsigned long long)cputime64_to_clock_t(nice),
519                         (unsigned long long)cputime64_to_clock_t(system),
520                         (unsigned long long)cputime64_to_clock_t(idle),
521                         (unsigned long long)cputime64_to_clock_t(iowait),
522                         (unsigned long long)cputime64_to_clock_t(irq),
523                         (unsigned long long)cputime64_to_clock_t(softirq),
524                         (unsigned long long)cputime64_to_clock_t(steal),
525                         (unsigned long long)cputime64_to_clock_t(guest));
526         }
527         seq_printf(p, "intr %llu", (unsigned long long)sum);
528
529         for (i = 0; i < NR_IRQS; i++)
530                 seq_printf(p, " %u", per_irq_sum[i]);
531
532         seq_printf(p,
533                 "\nctxt %llu\n"
534                 "btime %lu\n"
535                 "processes %lu\n"
536                 "procs_running %lu\n"
537                 "procs_blocked %lu\n",
538                 nr_context_switches(),
539                 (unsigned long)jif,
540                 total_forks,
541                 nr_running(),
542                 nr_iowait());
543
544         kfree(per_irq_sum);
545         return 0;
546 }
547
548 static int stat_open(struct inode *inode, struct file *file)
549 {
550         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
551         char *buf;
552         struct seq_file *m;
553         int res;
554
555         /* don't ask for more than the kmalloc() max size, currently 128 KB */
556         if (size > 128 * 1024)
557                 size = 128 * 1024;
558         buf = kmalloc(size, GFP_KERNEL);
559         if (!buf)
560                 return -ENOMEM;
561
562         res = single_open(file, show_stat, NULL);
563         if (!res) {
564                 m = file->private_data;
565                 m->buf = buf;
566                 m->size = size;
567         } else
568                 kfree(buf);
569         return res;
570 }
571 static const struct file_operations proc_stat_operations = {
572         .open           = stat_open,
573         .read           = seq_read,
574         .llseek         = seq_lseek,
575         .release        = single_release,
576 };
577
578 /*
579  * /proc/interrupts
580  */
581 static void *int_seq_start(struct seq_file *f, loff_t *pos)
582 {
583         return (*pos <= NR_IRQS) ? pos : NULL;
584 }
585
586 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
587 {
588         (*pos)++;
589         if (*pos > NR_IRQS)
590                 return NULL;
591         return pos;
592 }
593
594 static void int_seq_stop(struct seq_file *f, void *v)
595 {
596         /* Nothing to do */
597 }
598
599
600 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
601 static struct seq_operations int_seq_ops = {
602         .start = int_seq_start,
603         .next  = int_seq_next,
604         .stop  = int_seq_stop,
605         .show  = show_interrupts
606 };
607
608 static int interrupts_open(struct inode *inode, struct file *filp)
609 {
610         return seq_open(filp, &int_seq_ops);
611 }
612
613 static const struct file_operations proc_interrupts_operations = {
614         .open           = interrupts_open,
615         .read           = seq_read,
616         .llseek         = seq_lseek,
617         .release        = seq_release,
618 };
619
620 static int filesystems_read_proc(char *page, char **start, off_t off,
621                                  int count, int *eof, void *data)
622 {
623         int len = get_filesystem_list(page);
624         return proc_calc_metrics(page, start, off, count, eof, len);
625 }
626
627 static int cmdline_read_proc(char *page, char **start, off_t off,
628                                  int count, int *eof, void *data)
629 {
630         int len;
631
632         len = sprintf(page, "%s\n", saved_command_line);
633         return proc_calc_metrics(page, start, off, count, eof, len);
634 }
635
636 static int locks_open(struct inode *inode, struct file *filp)
637 {
638         return seq_open(filp, &locks_seq_operations);
639 }
640
641 static const struct file_operations proc_locks_operations = {
642         .open           = locks_open,
643         .read           = seq_read,
644         .llseek         = seq_lseek,
645         .release        = seq_release,
646 };
647
648 static int execdomains_read_proc(char *page, char **start, off_t off,
649                                  int count, int *eof, void *data)
650 {
651         int len = get_exec_domain_list(page);
652         return proc_calc_metrics(page, start, off, count, eof, len);
653 }
654
655 #ifdef CONFIG_MAGIC_SYSRQ
656 /*
657  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
658  */
659 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
660                                    size_t count, loff_t *ppos)
661 {
662         if (count) {
663                 char c;
664
665                 if (get_user(c, buf))
666                         return -EFAULT;
667                 __handle_sysrq(c, NULL, 0);
668         }
669         return count;
670 }
671
672 static const struct file_operations proc_sysrq_trigger_operations = {
673         .write          = write_sysrq_trigger,
674 };
675 #endif
676
677 struct proc_dir_entry *proc_root_kcore;
678
679 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
680 {
681         struct proc_dir_entry *entry;
682         entry = create_proc_entry(name, mode, NULL);
683         if (entry)
684                 entry->proc_fops = f;
685 }
686
687 void __init proc_misc_init(void)
688 {
689         static struct {
690                 char *name;
691                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
692         } *p, simple_ones[] = {
693                 {"loadavg",     loadavg_read_proc},
694                 {"uptime",      uptime_read_proc},
695                 {"meminfo",     meminfo_read_proc},
696                 {"version",     version_read_proc},
697 #ifdef CONFIG_PROC_HARDWARE
698                 {"hardware",    hardware_read_proc},
699 #endif
700 #ifdef CONFIG_STRAM_PROC
701                 {"stram",       stram_read_proc},
702 #endif
703                 {"filesystems", filesystems_read_proc},
704                 {"cmdline",     cmdline_read_proc},
705                 {"execdomains", execdomains_read_proc},
706                 {NULL,}
707         };
708         for (p = simple_ones; p->name; p++)
709                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
710
711         proc_symlink("mounts", NULL, "self/mounts");
712
713         /* And now for trickier ones */
714 #ifdef CONFIG_PRINTK
715         {
716                 struct proc_dir_entry *entry;
717                 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
718                 if (entry)
719                         entry->proc_fops = &proc_kmsg_operations;
720         }
721 #endif
722         create_seq_entry("locks", 0, &proc_locks_operations);
723         create_seq_entry("devices", 0, &proc_devinfo_operations);
724         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
725 #ifdef CONFIG_BLOCK
726         create_seq_entry("partitions", 0, &proc_partitions_operations);
727 #endif
728         create_seq_entry("stat", 0, &proc_stat_operations);
729         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
730 #ifdef CONFIG_SLAB
731         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
732 #ifdef CONFIG_DEBUG_SLAB_LEAK
733         create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
734 #endif
735 #endif
736         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
737         create_seq_entry("pagetypeinfo", S_IRUGO, &pagetypeinfo_file_ops);
738         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
739         create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
740 #ifdef CONFIG_BLOCK
741         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
742 #endif
743 #ifdef CONFIG_MODULES
744         create_seq_entry("modules", 0, &proc_modules_operations);
745 #endif
746 #ifdef CONFIG_SCHEDSTATS
747         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
748 #endif
749 #ifdef CONFIG_PROC_KCORE
750         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
751         if (proc_root_kcore) {
752                 proc_root_kcore->proc_fops = &proc_kcore_operations;
753                 proc_root_kcore->size =
754                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
755         }
756 #endif
757 #ifdef CONFIG_PROC_VMCORE
758         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
759         if (proc_vmcore)
760                 proc_vmcore->proc_fops = &proc_vmcore_operations;
761 #endif
762 #ifdef CONFIG_MAGIC_SYSRQ
763         {
764                 struct proc_dir_entry *entry;
765                 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
766                 if (entry)
767                         entry->proc_fops = &proc_sysrq_trigger_operations;
768         }
769 #endif
770 }