pid namespaces: define and use task_active_pid_ns() wrapper
[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,
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 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         cputime64_t guest;
460         u64 sum = 0;
461         struct timespec boottime;
462         unsigned int *per_irq_sum;
463
464         per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL);
465         if (!per_irq_sum)
466                 return -ENOMEM;
467
468         user = nice = system = idle = iowait =
469                 irq = softirq = steal = cputime64_zero;
470         guest = cputime64_zero;
471         getboottime(&boottime);
472         jif = boottime.tv_sec;
473
474         for_each_possible_cpu(i) {
475                 int j;
476
477                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
478                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
479                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
480                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
481                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
482                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
483                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
484                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
485                 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
486                 for (j = 0; j < NR_IRQS; j++) {
487                         unsigned int temp = kstat_cpu(i).irqs[j];
488                         sum += temp;
489                         per_irq_sum[j] += temp;
490                 }
491         }
492
493         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
494                 (unsigned long long)cputime64_to_clock_t(user),
495                 (unsigned long long)cputime64_to_clock_t(nice),
496                 (unsigned long long)cputime64_to_clock_t(system),
497                 (unsigned long long)cputime64_to_clock_t(idle),
498                 (unsigned long long)cputime64_to_clock_t(iowait),
499                 (unsigned long long)cputime64_to_clock_t(irq),
500                 (unsigned long long)cputime64_to_clock_t(softirq),
501                 (unsigned long long)cputime64_to_clock_t(steal),
502                 (unsigned long long)cputime64_to_clock_t(guest));
503         for_each_online_cpu(i) {
504
505                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
506                 user = kstat_cpu(i).cpustat.user;
507                 nice = kstat_cpu(i).cpustat.nice;
508                 system = kstat_cpu(i).cpustat.system;
509                 idle = kstat_cpu(i).cpustat.idle;
510                 iowait = kstat_cpu(i).cpustat.iowait;
511                 irq = kstat_cpu(i).cpustat.irq;
512                 softirq = kstat_cpu(i).cpustat.softirq;
513                 steal = kstat_cpu(i).cpustat.steal;
514                 guest = kstat_cpu(i).cpustat.guest;
515                 seq_printf(p,
516                         "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
517                         i,
518                         (unsigned long long)cputime64_to_clock_t(user),
519                         (unsigned long long)cputime64_to_clock_t(nice),
520                         (unsigned long long)cputime64_to_clock_t(system),
521                         (unsigned long long)cputime64_to_clock_t(idle),
522                         (unsigned long long)cputime64_to_clock_t(iowait),
523                         (unsigned long long)cputime64_to_clock_t(irq),
524                         (unsigned long long)cputime64_to_clock_t(softirq),
525                         (unsigned long long)cputime64_to_clock_t(steal),
526                         (unsigned long long)cputime64_to_clock_t(guest));
527         }
528         seq_printf(p, "intr %llu", (unsigned long long)sum);
529
530         for (i = 0; i < NR_IRQS; i++)
531                 seq_printf(p, " %u", per_irq_sum[i]);
532
533         seq_printf(p,
534                 "\nctxt %llu\n"
535                 "btime %lu\n"
536                 "processes %lu\n"
537                 "procs_running %lu\n"
538                 "procs_blocked %lu\n",
539                 nr_context_switches(),
540                 (unsigned long)jif,
541                 total_forks,
542                 nr_running(),
543                 nr_iowait());
544
545         kfree(per_irq_sum);
546         return 0;
547 }
548
549 static int stat_open(struct inode *inode, struct file *file)
550 {
551         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
552         char *buf;
553         struct seq_file *m;
554         int res;
555
556         /* don't ask for more than the kmalloc() max size, currently 128 KB */
557         if (size > 128 * 1024)
558                 size = 128 * 1024;
559         buf = kmalloc(size, GFP_KERNEL);
560         if (!buf)
561                 return -ENOMEM;
562
563         res = single_open(file, show_stat, NULL);
564         if (!res) {
565                 m = file->private_data;
566                 m->buf = buf;
567                 m->size = size;
568         } else
569                 kfree(buf);
570         return res;
571 }
572 static const struct file_operations proc_stat_operations = {
573         .open           = stat_open,
574         .read           = seq_read,
575         .llseek         = seq_lseek,
576         .release        = single_release,
577 };
578
579 /*
580  * /proc/interrupts
581  */
582 static void *int_seq_start(struct seq_file *f, loff_t *pos)
583 {
584         return (*pos <= NR_IRQS) ? pos : NULL;
585 }
586
587 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
588 {
589         (*pos)++;
590         if (*pos > NR_IRQS)
591                 return NULL;
592         return pos;
593 }
594
595 static void int_seq_stop(struct seq_file *f, void *v)
596 {
597         /* Nothing to do */
598 }
599
600
601 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
602 static struct seq_operations int_seq_ops = {
603         .start = int_seq_start,
604         .next  = int_seq_next,
605         .stop  = int_seq_stop,
606         .show  = show_interrupts
607 };
608
609 static int interrupts_open(struct inode *inode, struct file *filp)
610 {
611         return seq_open(filp, &int_seq_ops);
612 }
613
614 static const struct file_operations proc_interrupts_operations = {
615         .open           = interrupts_open,
616         .read           = seq_read,
617         .llseek         = seq_lseek,
618         .release        = seq_release,
619 };
620
621 static int filesystems_read_proc(char *page, char **start, off_t off,
622                                  int count, int *eof, void *data)
623 {
624         int len = get_filesystem_list(page);
625         return proc_calc_metrics(page, start, off, count, eof, len);
626 }
627
628 static int cmdline_read_proc(char *page, char **start, off_t off,
629                                  int count, int *eof, void *data)
630 {
631         int len;
632
633         len = sprintf(page, "%s\n", saved_command_line);
634         return proc_calc_metrics(page, start, off, count, eof, len);
635 }
636
637 static int locks_open(struct inode *inode, struct file *filp)
638 {
639         return seq_open(filp, &locks_seq_operations);
640 }
641
642 static const struct file_operations proc_locks_operations = {
643         .open           = locks_open,
644         .read           = seq_read,
645         .llseek         = seq_lseek,
646         .release        = seq_release,
647 };
648
649 static int execdomains_read_proc(char *page, char **start, off_t off,
650                                  int count, int *eof, void *data)
651 {
652         int len = get_exec_domain_list(page);
653         return proc_calc_metrics(page, start, off, count, eof, len);
654 }
655
656 #ifdef CONFIG_MAGIC_SYSRQ
657 /*
658  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
659  */
660 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
661                                    size_t count, loff_t *ppos)
662 {
663         if (count) {
664                 char c;
665
666                 if (get_user(c, buf))
667                         return -EFAULT;
668                 __handle_sysrq(c, NULL, 0);
669         }
670         return count;
671 }
672
673 static const struct file_operations proc_sysrq_trigger_operations = {
674         .write          = write_sysrq_trigger,
675 };
676 #endif
677
678 struct proc_dir_entry *proc_root_kcore;
679
680 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
681 {
682         struct proc_dir_entry *entry;
683         entry = create_proc_entry(name, mode, NULL);
684         if (entry)
685                 entry->proc_fops = f;
686 }
687
688 void __init proc_misc_init(void)
689 {
690         static struct {
691                 char *name;
692                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
693         } *p, simple_ones[] = {
694                 {"loadavg",     loadavg_read_proc},
695                 {"uptime",      uptime_read_proc},
696                 {"meminfo",     meminfo_read_proc},
697                 {"version",     version_read_proc},
698 #ifdef CONFIG_PROC_HARDWARE
699                 {"hardware",    hardware_read_proc},
700 #endif
701 #ifdef CONFIG_STRAM_PROC
702                 {"stram",       stram_read_proc},
703 #endif
704                 {"filesystems", filesystems_read_proc},
705                 {"cmdline",     cmdline_read_proc},
706                 {"execdomains", execdomains_read_proc},
707                 {NULL,}
708         };
709         for (p = simple_ones; p->name; p++)
710                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
711
712         proc_symlink("mounts", NULL, "self/mounts");
713
714         /* And now for trickier ones */
715 #ifdef CONFIG_PRINTK
716         {
717                 struct proc_dir_entry *entry;
718                 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
719                 if (entry)
720                         entry->proc_fops = &proc_kmsg_operations;
721         }
722 #endif
723         create_seq_entry("locks", 0, &proc_locks_operations);
724         create_seq_entry("devices", 0, &proc_devinfo_operations);
725         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
726 #ifdef CONFIG_BLOCK
727         create_seq_entry("partitions", 0, &proc_partitions_operations);
728 #endif
729         create_seq_entry("stat", 0, &proc_stat_operations);
730         create_seq_entry("interrupts", 0, &proc_interrupts_operations);
731 #ifdef CONFIG_SLAB
732         create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
733 #ifdef CONFIG_DEBUG_SLAB_LEAK
734         create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
735 #endif
736 #endif
737         create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
738         create_seq_entry("pagetypeinfo", S_IRUGO, &pagetypeinfo_file_ops);
739         create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
740         create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
741 #ifdef CONFIG_BLOCK
742         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
743 #endif
744 #ifdef CONFIG_MODULES
745         create_seq_entry("modules", 0, &proc_modules_operations);
746 #endif
747 #ifdef CONFIG_SCHEDSTATS
748         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
749 #endif
750 #ifdef CONFIG_PROC_KCORE
751         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
752         if (proc_root_kcore) {
753                 proc_root_kcore->proc_fops = &proc_kcore_operations;
754                 proc_root_kcore->size =
755                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
756         }
757 #endif
758 #ifdef CONFIG_PROC_VMCORE
759         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
760         if (proc_vmcore)
761                 proc_vmcore->proc_fops = &proc_vmcore_operations;
762 #endif
763 #ifdef CONFIG_MAGIC_SYSRQ
764         {
765                 struct proc_dir_entry *entry;
766                 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
767                 if (entry)
768                         entry->proc_fops = &proc_sysrq_trigger_operations;
769         }
770 #endif
771 }