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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/smp_lock.h>
39 #include <linux/seq_file.h>
40 #include <linux/times.h>
41 #include <linux/profile.h>
42 #include <linux/utsname.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 <linux/pid_namespace.h>
50 #include <asm/uaccess.h>
51 #include <asm/pgtable.h>
52 #include <asm/io.h>
53 #include <asm/tlb.h>
54 #include <asm/div64.h>
55 #include "internal.h"
56
57 #define LOAD_INT(x) ((x) >> FSHIFT)
58 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
59 /*
60  * Warning: stuff below (imported functions) assumes that its output will fit
61  * into one page. For some of those functions it may be wrong. Moreover, we
62  * have a way to deal with that gracefully. Right now I used straightforward
63  * wrappers, but this needs further analysis wrt potential overflows.
64  */
65 extern int get_hardware_list(char *);
66 extern int get_stram_list(char *);
67 extern int get_filesystem_list(char *);
68 extern int get_exec_domain_list(char *);
69 extern int get_dma_list(char *);
70 extern int get_locks_status (char *, char **, off_t, int);
71
72 static int proc_calc_metrics(char *page, char **start, off_t off,
73                                  int count, int *eof, int len)
74 {
75         if (len <= off+count) *eof = 1;
76         *start = page + off;
77         len -= off;
78         if (len>count) len = count;
79         if (len<0) len = 0;
80         return len;
81 }
82
83 static int loadavg_read_proc(char *page, char **start, off_t off,
84                                  int count, int *eof, void *data)
85 {
86         int a, b, c;
87         int len;
88
89         a = avenrun[0] + (FIXED_1/200);
90         b = avenrun[1] + (FIXED_1/200);
91         c = avenrun[2] + (FIXED_1/200);
92         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
93                 LOAD_INT(a), LOAD_FRAC(a),
94                 LOAD_INT(b), LOAD_FRAC(b),
95                 LOAD_INT(c), LOAD_FRAC(c),
96                 nr_running(), nr_threads, current->nsproxy->pid_ns->last_pid);
97         return proc_calc_metrics(page, start, off, count, eof, len);
98 }
99
100 static int uptime_read_proc(char *page, char **start, off_t off,
101                                  int count, int *eof, void *data)
102 {
103         struct timespec uptime;
104         struct timespec idle;
105         int len;
106         cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
107
108         do_posix_clock_monotonic_gettime(&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 zoneinfo_op;
234 static int zoneinfo_open(struct inode *inode, struct file *file)
235 {
236         return seq_open(file, &zoneinfo_op);
237 }
238
239 static const struct file_operations proc_zoneinfo_file_operations = {
240         .open           = zoneinfo_open,
241         .read           = seq_read,
242         .llseek         = seq_lseek,
243         .release        = seq_release,
244 };
245
246 static int version_read_proc(char *page, char **start, off_t off,
247                                  int count, int *eof, void *data)
248 {
249         int len;
250
251         len = snprintf(page, PAGE_SIZE, linux_proc_banner,
252                 utsname()->sysname,
253                 utsname()->release,
254                 utsname()->version);
255         return proc_calc_metrics(page, start, off, count, eof, len);
256 }
257
258 extern struct seq_operations cpuinfo_op;
259 static int cpuinfo_open(struct inode *inode, struct file *file)
260 {
261         return seq_open(file, &cpuinfo_op);
262 }
263
264 static const struct file_operations proc_cpuinfo_operations = {
265         .open           = cpuinfo_open,
266         .read           = seq_read,
267         .llseek         = seq_lseek,
268         .release        = seq_release,
269 };
270
271 static int devinfo_show(struct seq_file *f, void *v)
272 {
273         int i = *(loff_t *) v;
274
275         if (i < CHRDEV_MAJOR_HASH_SIZE) {
276                 if (i == 0)
277                         seq_printf(f, "Character devices:\n");
278                 chrdev_show(f, i);
279         }
280 #ifdef CONFIG_BLOCK
281         else {
282                 i -= CHRDEV_MAJOR_HASH_SIZE;
283                 if (i == 0)
284                         seq_printf(f, "\nBlock devices:\n");
285                 blkdev_show(f, i);
286         }
287 #endif
288         return 0;
289 }
290
291 static void *devinfo_start(struct seq_file *f, loff_t *pos)
292 {
293         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
294                 return pos;
295         return NULL;
296 }
297
298 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
299 {
300         (*pos)++;
301         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
302                 return NULL;
303         return pos;
304 }
305
306 static void devinfo_stop(struct seq_file *f, void *v)
307 {
308         /* Nothing to do */
309 }
310
311 static struct seq_operations devinfo_ops = {
312         .start = devinfo_start,
313         .next  = devinfo_next,
314         .stop  = devinfo_stop,
315         .show  = devinfo_show
316 };
317
318 static int devinfo_open(struct inode *inode, struct file *filp)
319 {
320         return seq_open(filp, &devinfo_ops);
321 }
322
323 static const struct file_operations proc_devinfo_operations = {
324         .open           = devinfo_open,
325         .read           = seq_read,
326         .llseek         = seq_lseek,
327         .release        = seq_release,
328 };
329
330 extern struct seq_operations vmstat_op;
331 static int vmstat_open(struct inode *inode, struct file *file)
332 {
333         return seq_open(file, &vmstat_op);
334 }
335 static const struct file_operations proc_vmstat_file_operations = {
336         .open           = vmstat_open,
337         .read           = seq_read,
338         .llseek         = seq_lseek,
339         .release        = seq_release,
340 };
341
342 #ifdef CONFIG_PROC_HARDWARE
343 static int hardware_read_proc(char *page, char **start, off_t off,
344                                  int count, int *eof, void *data)
345 {
346         int len = get_hardware_list(page);
347         return proc_calc_metrics(page, start, off, count, eof, len);
348 }
349 #endif
350
351 #ifdef CONFIG_STRAM_PROC
352 static int stram_read_proc(char *page, char **start, off_t off,
353                                  int count, int *eof, void *data)
354 {
355         int len = get_stram_list(page);
356         return proc_calc_metrics(page, start, off, count, eof, len);
357 }
358 #endif
359
360 #ifdef CONFIG_BLOCK
361 extern struct seq_operations partitions_op;
362 static int partitions_open(struct inode *inode, struct file *file)
363 {
364         return seq_open(file, &partitions_op);
365 }
366 static const struct file_operations proc_partitions_operations = {
367         .open           = partitions_open,
368         .read           = seq_read,
369         .llseek         = seq_lseek,
370         .release        = seq_release,
371 };
372
373 extern struct seq_operations diskstats_op;
374 static int diskstats_open(struct inode *inode, struct file *file)
375 {
376         return seq_open(file, &diskstats_op);
377 }
378 static const struct file_operations proc_diskstats_operations = {
379         .open           = diskstats_open,
380         .read           = seq_read,
381         .llseek         = seq_lseek,
382         .release        = seq_release,
383 };
384 #endif
385
386 #ifdef CONFIG_MODULES
387 extern struct seq_operations modules_op;
388 static int modules_open(struct inode *inode, struct file *file)
389 {
390         return seq_open(file, &modules_op);
391 }
392 static const struct file_operations proc_modules_operations = {
393         .open           = modules_open,
394         .read           = seq_read,
395         .llseek         = seq_lseek,
396         .release        = seq_release,
397 };
398 #endif
399
400 #ifdef CONFIG_SLAB
401 static int slabinfo_open(struct inode *inode, struct file *file)
402 {
403         return seq_open(file, &slabinfo_op);
404 }
405 static const struct file_operations proc_slabinfo_operations = {
406         .open           = slabinfo_open,
407         .read           = seq_read,
408         .write          = slabinfo_write,
409         .llseek         = seq_lseek,
410         .release        = seq_release,
411 };
412
413 #ifdef CONFIG_DEBUG_SLAB_LEAK
414 extern struct seq_operations slabstats_op;
415 static int slabstats_open(struct inode *inode, struct file *file)
416 {
417         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
418         int ret = -ENOMEM;
419         if (n) {
420                 ret = seq_open(file, &slabstats_op);
421                 if (!ret) {
422                         struct seq_file *m = file->private_data;
423                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
424                         m->private = n;
425                         n = NULL;
426                 }
427                 kfree(n);
428         }
429         return ret;
430 }
431
432 static int slabstats_release(struct inode *inode, struct file *file)
433 {
434         struct seq_file *m = file->private_data;
435         kfree(m->private);
436         return seq_release(inode, file);
437 }
438
439 static const struct file_operations proc_slabstats_operations = {
440         .open           = slabstats_open,
441         .read           = seq_read,
442         .llseek         = seq_lseek,
443         .release        = slabstats_release,
444 };
445 #endif
446 #endif
447
448 static int show_stat(struct seq_file *p, void *v)
449 {
450         int i;
451         unsigned long jif;
452         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
453         u64 sum = 0;
454
455         user = nice = system = idle = iowait =
456                 irq = softirq = steal = cputime64_zero;
457         jif = - wall_to_monotonic.tv_sec;
458         if (wall_to_monotonic.tv_nsec)
459                 --jif;
460
461         for_each_possible_cpu(i) {
462                 int j;
463
464                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
465                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
466                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
467                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
468                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
469                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
470                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
471                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
472                 for (j = 0 ; j < NR_IRQS ; j++)
473                         sum += kstat_cpu(i).irqs[j];
474         }
475
476         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",
477                 (unsigned long long)cputime64_to_clock_t(user),
478                 (unsigned long long)cputime64_to_clock_t(nice),
479                 (unsigned long long)cputime64_to_clock_t(system),
480                 (unsigned long long)cputime64_to_clock_t(idle),
481                 (unsigned long long)cputime64_to_clock_t(iowait),
482                 (unsigned long long)cputime64_to_clock_t(irq),
483                 (unsigned long long)cputime64_to_clock_t(softirq),
484                 (unsigned long long)cputime64_to_clock_t(steal));
485         for_each_online_cpu(i) {
486
487                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
488                 user = kstat_cpu(i).cpustat.user;
489                 nice = kstat_cpu(i).cpustat.nice;
490                 system = kstat_cpu(i).cpustat.system;
491                 idle = kstat_cpu(i).cpustat.idle;
492                 iowait = kstat_cpu(i).cpustat.iowait;
493                 irq = kstat_cpu(i).cpustat.irq;
494                 softirq = kstat_cpu(i).cpustat.softirq;
495                 steal = kstat_cpu(i).cpustat.steal;
496                 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
497                         i,
498                         (unsigned long long)cputime64_to_clock_t(user),
499                         (unsigned long long)cputime64_to_clock_t(nice),
500                         (unsigned long long)cputime64_to_clock_t(system),
501                         (unsigned long long)cputime64_to_clock_t(idle),
502                         (unsigned long long)cputime64_to_clock_t(iowait),
503                         (unsigned long long)cputime64_to_clock_t(irq),
504                         (unsigned long long)cputime64_to_clock_t(softirq),
505                         (unsigned long long)cputime64_to_clock_t(steal));
506         }
507         seq_printf(p, "intr %llu", (unsigned long long)sum);
508
509 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
510         for (i = 0; i < NR_IRQS; i++)
511                 seq_printf(p, " %u", kstat_irqs(i));
512 #endif
513
514         seq_printf(p,
515                 "\nctxt %llu\n"
516                 "btime %lu\n"
517                 "processes %lu\n"
518                 "procs_running %lu\n"
519                 "procs_blocked %lu\n",
520                 nr_context_switches(),
521                 (unsigned long)jif,
522                 total_forks,
523                 nr_running(),
524                 nr_iowait());
525
526         return 0;
527 }
528
529 static int stat_open(struct inode *inode, struct file *file)
530 {
531         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
532         char *buf;
533         struct seq_file *m;
534         int res;
535
536         /* don't ask for more than the kmalloc() max size, currently 128 KB */
537         if (size > 128 * 1024)
538                 size = 128 * 1024;
539         buf = kmalloc(size, GFP_KERNEL);
540         if (!buf)
541                 return -ENOMEM;
542
543         res = single_open(file, show_stat, NULL);
544         if (!res) {
545                 m = file->private_data;
546                 m->buf = buf;
547                 m->size = size;
548         } else
549                 kfree(buf);
550         return res;
551 }
552 static const struct file_operations proc_stat_operations = {
553         .open           = stat_open,
554         .read           = seq_read,
555         .llseek         = seq_lseek,
556         .release        = single_release,
557 };
558
559 /*
560  * /proc/interrupts
561  */
562 static void *int_seq_start(struct seq_file *f, loff_t *pos)
563 {
564         return (*pos <= NR_IRQS) ? pos : NULL;
565 }
566
567 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
568 {
569         (*pos)++;
570         if (*pos > NR_IRQS)
571                 return NULL;
572         return pos;
573 }
574
575 static void int_seq_stop(struct seq_file *f, void *v)
576 {
577         /* Nothing to do */
578 }
579
580
581 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
582 static struct seq_operations int_seq_ops = {
583         .start = int_seq_start,
584         .next  = int_seq_next,
585         .stop  = int_seq_stop,
586         .show  = show_interrupts
587 };
588
589 static int interrupts_open(struct inode *inode, struct file *filp)
590 {
591         return seq_open(filp, &int_seq_ops);
592 }
593
594 static const struct file_operations proc_interrupts_operations = {
595         .open           = interrupts_open,
596         .read           = seq_read,
597         .llseek         = seq_lseek,
598         .release        = seq_release,
599 };
600
601 static int filesystems_read_proc(char *page, char **start, off_t off,
602                                  int count, int *eof, void *data)
603 {
604         int len = get_filesystem_list(page);
605         return proc_calc_metrics(page, start, off, count, eof, len);
606 }
607
608 static int cmdline_read_proc(char *page, char **start, off_t off,
609                                  int count, int *eof, void *data)
610 {
611         int len;
612
613         len = sprintf(page, "%s\n", saved_command_line);
614         return proc_calc_metrics(page, start, off, count, eof, len);
615 }
616
617 static int locks_read_proc(char *page, char **start, off_t off,
618                                  int count, int *eof, void *data)
619 {
620         int len = get_locks_status(page, start, off, count);
621
622         if (len < count)
623                 *eof = 1;
624         return len;
625 }
626
627 static int execdomains_read_proc(char *page, char **start, off_t off,
628                                  int count, int *eof, void *data)
629 {
630         int len = get_exec_domain_list(page);
631         return proc_calc_metrics(page, start, off, count, eof, len);
632 }
633
634 #ifdef CONFIG_MAGIC_SYSRQ
635 /*
636  * writing 'C' to /proc/sysrq-trigger is like sysrq-C
637  */
638 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
639                                    size_t count, loff_t *ppos)
640 {
641         if (count) {
642                 char c;
643
644                 if (get_user(c, buf))
645                         return -EFAULT;
646                 __handle_sysrq(c, NULL, 0);
647         }
648         return count;
649 }
650
651 static const struct file_operations proc_sysrq_trigger_operations = {
652         .write          = write_sysrq_trigger,
653 };
654 #endif
655
656 struct proc_dir_entry *proc_root_kcore;
657
658 void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
659 {
660         struct proc_dir_entry *entry;
661         entry = create_proc_entry(name, mode, NULL);
662         if (entry)
663                 entry->proc_fops = f;
664 }
665
666 void __init proc_misc_init(void)
667 {
668         static struct {
669                 char *name;
670                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
671         } *p, simple_ones[] = {
672                 {"loadavg",     loadavg_read_proc},
673                 {"uptime",      uptime_read_proc},
674                 {"meminfo",     meminfo_read_proc},
675                 {"version",     version_read_proc},
676 #ifdef CONFIG_PROC_HARDWARE
677                 {"hardware",    hardware_read_proc},
678 #endif
679 #ifdef CONFIG_STRAM_PROC
680                 {"stram",       stram_read_proc},
681 #endif
682                 {"filesystems", filesystems_read_proc},
683                 {"cmdline",     cmdline_read_proc},
684                 {"locks",       locks_read_proc},
685                 {"execdomains", execdomains_read_proc},
686                 {NULL,}
687         };
688         for (p = simple_ones; p->name; p++)
689                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
690
691         proc_symlink("mounts", NULL, "self/mounts");
692
693         /* And now for trickier ones */
694 #ifdef CONFIG_PRINTK
695         {
696                 struct proc_dir_entry *entry;
697                 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
698                 if (entry)
699                         entry->proc_fops = &proc_kmsg_operations;
700         }
701 #endif
702         create_seq_entry("devices", 0, &proc_devinfo_operations);
703         create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
704 #ifdef CONFIG_BLOCK
705         create_seq_entry("partitions", 0, &proc_partitions_operations);
706 #endif
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 #ifdef CONFIG_BLOCK
719         create_seq_entry("diskstats", 0, &proc_diskstats_operations);
720 #endif
721 #ifdef CONFIG_MODULES
722         create_seq_entry("modules", 0, &proc_modules_operations);
723 #endif
724 #ifdef CONFIG_SCHEDSTATS
725         create_seq_entry("schedstat", 0, &proc_schedstat_operations);
726 #endif
727 #ifdef CONFIG_PROC_KCORE
728         proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
729         if (proc_root_kcore) {
730                 proc_root_kcore->proc_fops = &proc_kcore_operations;
731                 proc_root_kcore->size =
732                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
733         }
734 #endif
735 #ifdef CONFIG_PROC_VMCORE
736         proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
737         if (proc_vmcore)
738                 proc_vmcore->proc_fops = &proc_vmcore_operations;
739 #endif
740 #ifdef CONFIG_MAGIC_SYSRQ
741         {
742                 struct proc_dir_entry *entry;
743                 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
744                 if (entry)
745                         entry->proc_fops = &proc_sysrq_trigger_operations;
746         }
747 #endif
748 }