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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Neil Horman7170be52006-01-14 13:20:38 -080023#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#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/blkdev.h>
43#include <linux/hugetlb.h>
44#include <linux/jiffies.h>
45#include <linux/sysrq.h>
46#include <linux/vmalloc.h>
Vivek Goyal666bfdd2005-06-25 14:58:21 -070047#include <linux/crash_dump.h>
Sukadev Bhattiprolu3fbc9642006-10-02 02:17:24 -070048#include <linux/pspace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#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 */
64extern int get_hardware_list(char *);
65extern int get_stram_list(char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066extern int get_filesystem_list(char *);
67extern int get_exec_domain_list(char *);
68extern int get_dma_list(char *);
69extern int get_locks_status (char *, char **, off_t, int);
70
71static int proc_calc_metrics(char *page, char **start, off_t off,
72 int count, int *eof, int len)
73{
74 if (len <= off+count) *eof = 1;
75 *start = page + off;
76 len -= off;
77 if (len>count) len = count;
78 if (len<0) len = 0;
79 return len;
80}
81
82static int loadavg_read_proc(char *page, char **start, off_t off,
83 int count, int *eof, void *data)
84{
85 int a, b, c;
86 int len;
87
88 a = avenrun[0] + (FIXED_1/200);
89 b = avenrun[1] + (FIXED_1/200);
90 c = avenrun[2] + (FIXED_1/200);
91 len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
92 LOAD_INT(a), LOAD_FRAC(a),
93 LOAD_INT(b), LOAD_FRAC(b),
94 LOAD_INT(c), LOAD_FRAC(c),
Sukadev Bhattiprolu3fbc9642006-10-02 02:17:24 -070095 nr_running(), nr_threads, init_pspace.last_pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 return proc_calc_metrics(page, start, off, count, eof, len);
97}
98
99static 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 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
118static 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 unsigned long inactive;
124 unsigned long active;
125 unsigned long free;
126 unsigned long committed;
127 unsigned long allowed;
128 struct vmalloc_info vmi;
Martin Hicks4c4c4022005-04-16 15:24:08 -0700129 long cached;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 get_zone_counts(&active, &inactive, &free);
132
133/*
134 * display in kilobytes.
135 */
136#define K(x) ((x) << (PAGE_SHIFT - 10))
137 si_meminfo(&i);
138 si_swapinfo(&i);
139 committed = atomic_read(&vm_committed_space);
140 allowed = ((totalram_pages - hugetlb_total_pages())
141 * sysctl_overcommit_ratio / 100) + total_swap_pages;
142
Christoph Lameter347ce432006-06-30 01:55:35 -0700143 cached = global_page_state(NR_FILE_PAGES) -
144 total_swapcache_pages - i.bufferram;
Martin Hicks4c4c4022005-04-16 15:24:08 -0700145 if (cached < 0)
146 cached = 0;
147
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 get_vmalloc_info(&vmi);
149
150 /*
151 * Tagged format, for easy grepping and expansion.
152 */
153 len = sprintf(page,
154 "MemTotal: %8lu kB\n"
155 "MemFree: %8lu kB\n"
156 "Buffers: %8lu kB\n"
157 "Cached: %8lu kB\n"
158 "SwapCached: %8lu kB\n"
159 "Active: %8lu kB\n"
160 "Inactive: %8lu kB\n"
Christoph Lameter182e8e22006-09-25 23:31:10 -0700161#ifdef CONFIG_HIGHMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 "HighTotal: %8lu kB\n"
163 "HighFree: %8lu kB\n"
164 "LowTotal: %8lu kB\n"
165 "LowFree: %8lu kB\n"
Christoph Lameter182e8e22006-09-25 23:31:10 -0700166#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 "SwapTotal: %8lu kB\n"
168 "SwapFree: %8lu kB\n"
169 "Dirty: %8lu kB\n"
170 "Writeback: %8lu kB\n"
Christoph Lameterf3dbd342006-06-30 01:55:36 -0700171 "AnonPages: %8lu kB\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 "Mapped: %8lu kB\n"
173 "Slab: %8lu kB\n"
Christoph Lameter972d1a72006-09-25 23:31:51 -0700174 "SReclaimable: %8lu kB\n"
175 "SUnreclaim: %8lu kB\n"
Christoph Lameterdf849a12006-06-30 01:55:38 -0700176 "PageTables: %8lu kB\n"
Andrew Mortonf5ef68d2006-08-27 01:23:58 -0700177 "NFS_Unstable: %8lu kB\n"
Christoph Lameterd2c5e302006-06-30 01:55:41 -0700178 "Bounce: %8lu kB\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 "CommitLimit: %8lu kB\n"
180 "Committed_AS: %8lu kB\n"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 "VmallocTotal: %8lu kB\n"
182 "VmallocUsed: %8lu kB\n"
183 "VmallocChunk: %8lu kB\n",
184 K(i.totalram),
185 K(i.freeram),
186 K(i.bufferram),
Martin Hicks4c4c4022005-04-16 15:24:08 -0700187 K(cached),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 K(total_swapcache_pages),
189 K(active),
190 K(inactive),
Christoph Lameter182e8e22006-09-25 23:31:10 -0700191#ifdef CONFIG_HIGHMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 K(i.totalhigh),
193 K(i.freehigh),
194 K(i.totalram-i.totalhigh),
195 K(i.freeram-i.freehigh),
Christoph Lameter182e8e22006-09-25 23:31:10 -0700196#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 K(i.totalswap),
198 K(i.freeswap),
Christoph Lameterb1e7a8f2006-06-30 01:55:39 -0700199 K(global_page_state(NR_FILE_DIRTY)),
Christoph Lameterce866b32006-06-30 01:55:40 -0700200 K(global_page_state(NR_WRITEBACK)),
Christoph Lameterf3dbd342006-06-30 01:55:36 -0700201 K(global_page_state(NR_ANON_PAGES)),
Christoph Lameter65ba55f2006-06-30 01:55:34 -0700202 K(global_page_state(NR_FILE_MAPPED)),
Christoph Lameter972d1a72006-09-25 23:31:51 -0700203 K(global_page_state(NR_SLAB_RECLAIMABLE) +
204 global_page_state(NR_SLAB_UNRECLAIMABLE)),
205 K(global_page_state(NR_SLAB_RECLAIMABLE)),
206 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
Christoph Lameterdf849a12006-06-30 01:55:38 -0700207 K(global_page_state(NR_PAGETABLE)),
Christoph Lameterfd39fc82006-06-30 01:55:40 -0700208 K(global_page_state(NR_UNSTABLE_NFS)),
Christoph Lameterd2c5e302006-06-30 01:55:41 -0700209 K(global_page_state(NR_BOUNCE)),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 K(allowed),
211 K(committed),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 (unsigned long)VMALLOC_TOTAL >> 10,
213 vmi.used >> 10,
214 vmi.largest_chunk >> 10
215 );
216
217 len += hugetlb_report_meminfo(page + len);
218
219 return proc_calc_metrics(page, start, off, count, eof, len);
220#undef K
221}
222
223extern struct seq_operations fragmentation_op;
224static int fragmentation_open(struct inode *inode, struct file *file)
225{
226 (void)inode;
227 return seq_open(file, &fragmentation_op);
228}
229
230static struct file_operations fragmentation_file_operations = {
231 .open = fragmentation_open,
232 .read = seq_read,
233 .llseek = seq_lseek,
234 .release = seq_release,
235};
236
Nikita Danilov295ab932005-06-21 17:14:38 -0700237extern struct seq_operations zoneinfo_op;
238static int zoneinfo_open(struct inode *inode, struct file *file)
239{
240 return seq_open(file, &zoneinfo_op);
241}
242
243static struct file_operations proc_zoneinfo_file_operations = {
244 .open = zoneinfo_open,
245 .read = seq_read,
246 .llseek = seq_lseek,
247 .release = seq_release,
248};
249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250static int version_read_proc(char *page, char **start, off_t off,
251 int count, int *eof, void *data)
252{
253 int len;
254
255 strcpy(page, linux_banner);
256 len = strlen(page);
257 return proc_calc_metrics(page, start, off, count, eof, len);
258}
259
260extern struct seq_operations cpuinfo_op;
261static int cpuinfo_open(struct inode *inode, struct file *file)
262{
263 return seq_open(file, &cpuinfo_op);
264}
Neil Horman7170be52006-01-14 13:20:38 -0800265
Joe Korty68eef3b2006-03-31 02:30:32 -0800266static struct file_operations proc_cpuinfo_operations = {
267 .open = cpuinfo_open,
Neil Horman7170be52006-01-14 13:20:38 -0800268 .read = seq_read,
269 .llseek = seq_lseek,
270 .release = seq_release,
271};
272
Joe Korty68eef3b2006-03-31 02:30:32 -0800273static int devinfo_show(struct seq_file *f, void *v)
274{
275 int i = *(loff_t *) v;
276
277 if (i < CHRDEV_MAJOR_HASH_SIZE) {
278 if (i == 0)
279 seq_printf(f, "Character devices:\n");
280 chrdev_show(f, i);
David Howells93614012006-09-30 20:45:40 +0200281 }
282#ifdef CONFIG_BLOCK
283 else {
Joe Korty68eef3b2006-03-31 02:30:32 -0800284 i -= CHRDEV_MAJOR_HASH_SIZE;
285 if (i == 0)
286 seq_printf(f, "\nBlock devices:\n");
287 blkdev_show(f, i);
288 }
David Howells93614012006-09-30 20:45:40 +0200289#endif
Joe Korty68eef3b2006-03-31 02:30:32 -0800290 return 0;
291}
292
293static void *devinfo_start(struct seq_file *f, loff_t *pos)
294{
295 if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
296 return pos;
297 return NULL;
298}
299
300static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
301{
302 (*pos)++;
303 if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
304 return NULL;
305 return pos;
306}
307
308static void devinfo_stop(struct seq_file *f, void *v)
309{
310 /* Nothing to do */
311}
312
313static struct seq_operations devinfo_ops = {
314 .start = devinfo_start,
315 .next = devinfo_next,
316 .stop = devinfo_stop,
317 .show = devinfo_show
318};
319
320static int devinfo_open(struct inode *inode, struct file *filp)
321{
322 return seq_open(filp, &devinfo_ops);
323}
324
325static struct file_operations proc_devinfo_operations = {
326 .open = devinfo_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 .read = seq_read,
328 .llseek = seq_lseek,
329 .release = seq_release,
330};
331
332extern struct seq_operations vmstat_op;
333static int vmstat_open(struct inode *inode, struct file *file)
334{
335 return seq_open(file, &vmstat_op);
336}
337static struct file_operations proc_vmstat_file_operations = {
338 .open = vmstat_open,
339 .read = seq_read,
340 .llseek = seq_lseek,
341 .release = seq_release,
342};
343
344#ifdef CONFIG_PROC_HARDWARE
345static int hardware_read_proc(char *page, char **start, off_t off,
346 int count, int *eof, void *data)
347{
348 int len = get_hardware_list(page);
349 return proc_calc_metrics(page, start, off, count, eof, len);
350}
351#endif
352
353#ifdef CONFIG_STRAM_PROC
354static int stram_read_proc(char *page, char **start, off_t off,
355 int count, int *eof, void *data)
356{
357 int len = get_stram_list(page);
358 return proc_calc_metrics(page, start, off, count, eof, len);
359}
360#endif
361
David Howells93614012006-09-30 20:45:40 +0200362#ifdef CONFIG_BLOCK
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363extern struct seq_operations partitions_op;
364static int partitions_open(struct inode *inode, struct file *file)
365{
366 return seq_open(file, &partitions_op);
367}
368static struct file_operations proc_partitions_operations = {
369 .open = partitions_open,
370 .read = seq_read,
371 .llseek = seq_lseek,
372 .release = seq_release,
373};
374
375extern struct seq_operations diskstats_op;
376static int diskstats_open(struct inode *inode, struct file *file)
377{
378 return seq_open(file, &diskstats_op);
379}
380static struct file_operations proc_diskstats_operations = {
381 .open = diskstats_open,
382 .read = seq_read,
383 .llseek = seq_lseek,
384 .release = seq_release,
385};
David Howells93614012006-09-30 20:45:40 +0200386#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
388#ifdef CONFIG_MODULES
389extern struct seq_operations modules_op;
390static int modules_open(struct inode *inode, struct file *file)
391{
392 return seq_open(file, &modules_op);
393}
394static struct file_operations proc_modules_operations = {
395 .open = modules_open,
396 .read = seq_read,
397 .llseek = seq_lseek,
398 .release = seq_release,
399};
400#endif
401
Matt Mackall10cef602006-01-08 01:01:45 -0800402#ifdef CONFIG_SLAB
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403extern struct seq_operations slabinfo_op;
404extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
405static int slabinfo_open(struct inode *inode, struct file *file)
406{
407 return seq_open(file, &slabinfo_op);
408}
409static struct file_operations proc_slabinfo_operations = {
410 .open = slabinfo_open,
411 .read = seq_read,
412 .write = slabinfo_write,
413 .llseek = seq_lseek,
414 .release = seq_release,
415};
Al Viro871751e2006-03-25 03:06:39 -0800416
417#ifdef CONFIG_DEBUG_SLAB_LEAK
418extern struct seq_operations slabstats_op;
419static int slabstats_open(struct inode *inode, struct file *file)
420{
421 unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
422 int ret = -ENOMEM;
423 if (n) {
424 ret = seq_open(file, &slabstats_op);
425 if (!ret) {
426 struct seq_file *m = file->private_data;
427 *n = PAGE_SIZE / (2 * sizeof(unsigned long));
428 m->private = n;
429 n = NULL;
430 }
431 kfree(n);
432 }
433 return ret;
434}
435
436static int slabstats_release(struct inode *inode, struct file *file)
437{
438 struct seq_file *m = file->private_data;
439 kfree(m->private);
440 return seq_release(inode, file);
441}
442
443static struct file_operations proc_slabstats_operations = {
444 .open = slabstats_open,
445 .read = seq_read,
446 .llseek = seq_lseek,
447 .release = slabstats_release,
448};
449#endif
Matt Mackall10cef602006-01-08 01:01:45 -0800450#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452static int show_stat(struct seq_file *p, void *v)
453{
454 int i;
455 unsigned long jif;
456 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
457 u64 sum = 0;
458
459 user = nice = system = idle = iowait =
460 irq = softirq = steal = cputime64_zero;
461 jif = - wall_to_monotonic.tv_sec;
462 if (wall_to_monotonic.tv_nsec)
463 --jif;
464
KAMEZAWA Hiroyuki0a945022006-03-28 01:56:37 -0800465 for_each_possible_cpu(i) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 int j;
467
468 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
469 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
470 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
471 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
472 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
473 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
474 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
475 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
476 for (j = 0 ; j < NR_IRQS ; j++)
477 sum += kstat_cpu(i).irqs[j];
478 }
479
480 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu\n",
481 (unsigned long long)cputime64_to_clock_t(user),
482 (unsigned long long)cputime64_to_clock_t(nice),
483 (unsigned long long)cputime64_to_clock_t(system),
484 (unsigned long long)cputime64_to_clock_t(idle),
485 (unsigned long long)cputime64_to_clock_t(iowait),
486 (unsigned long long)cputime64_to_clock_t(irq),
487 (unsigned long long)cputime64_to_clock_t(softirq),
488 (unsigned long long)cputime64_to_clock_t(steal));
489 for_each_online_cpu(i) {
490
491 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
492 user = kstat_cpu(i).cpustat.user;
493 nice = kstat_cpu(i).cpustat.nice;
494 system = kstat_cpu(i).cpustat.system;
495 idle = kstat_cpu(i).cpustat.idle;
496 iowait = kstat_cpu(i).cpustat.iowait;
497 irq = kstat_cpu(i).cpustat.irq;
498 softirq = kstat_cpu(i).cpustat.softirq;
499 steal = kstat_cpu(i).cpustat.steal;
500 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
501 i,
502 (unsigned long long)cputime64_to_clock_t(user),
503 (unsigned long long)cputime64_to_clock_t(nice),
504 (unsigned long long)cputime64_to_clock_t(system),
505 (unsigned long long)cputime64_to_clock_t(idle),
506 (unsigned long long)cputime64_to_clock_t(iowait),
507 (unsigned long long)cputime64_to_clock_t(irq),
508 (unsigned long long)cputime64_to_clock_t(softirq),
509 (unsigned long long)cputime64_to_clock_t(steal));
510 }
511 seq_printf(p, "intr %llu", (unsigned long long)sum);
512
schwab@suse.dea1854612006-02-03 03:04:24 -0800513#if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA) && !defined(CONFIG_IA64)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 for (i = 0; i < NR_IRQS; i++)
515 seq_printf(p, " %u", kstat_irqs(i));
516#endif
517
518 seq_printf(p,
519 "\nctxt %llu\n"
520 "btime %lu\n"
521 "processes %lu\n"
522 "procs_running %lu\n"
523 "procs_blocked %lu\n",
524 nr_context_switches(),
525 (unsigned long)jif,
526 total_forks,
527 nr_running(),
528 nr_iowait());
529
530 return 0;
531}
532
533static int stat_open(struct inode *inode, struct file *file)
534{
535 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
536 char *buf;
537 struct seq_file *m;
538 int res;
539
540 /* don't ask for more than the kmalloc() max size, currently 128 KB */
541 if (size > 128 * 1024)
542 size = 128 * 1024;
543 buf = kmalloc(size, GFP_KERNEL);
544 if (!buf)
545 return -ENOMEM;
546
547 res = single_open(file, show_stat, NULL);
548 if (!res) {
549 m = file->private_data;
550 m->buf = buf;
551 m->size = size;
552 } else
553 kfree(buf);
554 return res;
555}
556static struct file_operations proc_stat_operations = {
557 .open = stat_open,
558 .read = seq_read,
559 .llseek = seq_lseek,
560 .release = single_release,
561};
562
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563/*
564 * /proc/interrupts
565 */
566static void *int_seq_start(struct seq_file *f, loff_t *pos)
567{
568 return (*pos <= NR_IRQS) ? pos : NULL;
569}
570
571static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
572{
573 (*pos)++;
574 if (*pos > NR_IRQS)
575 return NULL;
576 return pos;
577}
578
579static void int_seq_stop(struct seq_file *f, void *v)
580{
581 /* Nothing to do */
582}
583
584
585extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
586static struct seq_operations int_seq_ops = {
587 .start = int_seq_start,
588 .next = int_seq_next,
589 .stop = int_seq_stop,
590 .show = show_interrupts
591};
592
593static int interrupts_open(struct inode *inode, struct file *filp)
594{
595 return seq_open(filp, &int_seq_ops);
596}
597
598static struct file_operations proc_interrupts_operations = {
599 .open = interrupts_open,
600 .read = seq_read,
601 .llseek = seq_lseek,
602 .release = seq_release,
603};
604
605static int filesystems_read_proc(char *page, char **start, off_t off,
606 int count, int *eof, void *data)
607{
608 int len = get_filesystem_list(page);
609 return proc_calc_metrics(page, start, off, count, eof, len);
610}
611
612static int cmdline_read_proc(char *page, char **start, off_t off,
613 int count, int *eof, void *data)
614{
615 int len;
616
617 len = sprintf(page, "%s\n", saved_command_line);
618 return proc_calc_metrics(page, start, off, count, eof, len);
619}
620
621static int locks_read_proc(char *page, char **start, off_t off,
622 int count, int *eof, void *data)
623{
624 int len = get_locks_status(page, start, off, count);
625
626 if (len < count)
627 *eof = 1;
628 return len;
629}
630
631static int execdomains_read_proc(char *page, char **start, off_t off,
632 int count, int *eof, void *data)
633{
634 int len = get_exec_domain_list(page);
635 return proc_calc_metrics(page, start, off, count, eof, len);
636}
637
638#ifdef CONFIG_MAGIC_SYSRQ
639/*
640 * writing 'C' to /proc/sysrq-trigger is like sysrq-C
641 */
642static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
643 size_t count, loff_t *ppos)
644{
645 if (count) {
646 char c;
647
648 if (get_user(c, buf))
649 return -EFAULT;
David Howells7d12e782006-10-05 14:55:46 +0100650 __handle_sysrq(c, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 }
652 return count;
653}
654
655static struct file_operations proc_sysrq_trigger_operations = {
656 .write = write_sysrq_trigger,
657};
658#endif
659
660struct proc_dir_entry *proc_root_kcore;
661
Arjan van de Ven99ac48f2006-03-28 01:56:41 -0800662void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663{
664 struct proc_dir_entry *entry;
665 entry = create_proc_entry(name, mode, NULL);
666 if (entry)
667 entry->proc_fops = f;
668}
669
670void __init proc_misc_init(void)
671{
672 struct proc_dir_entry *entry;
673 static struct {
674 char *name;
675 int (*read_proc)(char*,char**,off_t,int,int*,void*);
676 } *p, simple_ones[] = {
677 {"loadavg", loadavg_read_proc},
678 {"uptime", uptime_read_proc},
679 {"meminfo", meminfo_read_proc},
680 {"version", version_read_proc},
681#ifdef CONFIG_PROC_HARDWARE
682 {"hardware", hardware_read_proc},
683#endif
684#ifdef CONFIG_STRAM_PROC
685 {"stram", stram_read_proc},
686#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 {"filesystems", filesystems_read_proc},
688 {"cmdline", cmdline_read_proc},
689 {"locks", locks_read_proc},
690 {"execdomains", execdomains_read_proc},
691 {NULL,}
692 };
693 for (p = simple_ones; p->name; p++)
694 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
695
696 proc_symlink("mounts", NULL, "self/mounts");
697
698 /* And now for trickier ones */
Mike Galbraithc36264d2006-12-06 20:37:42 -0800699#ifdef CONFIG_PRINTK
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
701 if (entry)
702 entry->proc_fops = &proc_kmsg_operations;
Mike Galbraithc36264d2006-12-06 20:37:42 -0800703#endif
Neil Horman7170be52006-01-14 13:20:38 -0800704 create_seq_entry("devices", 0, &proc_devinfo_operations);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
David Howells93614012006-09-30 20:45:40 +0200706#ifdef CONFIG_BLOCK
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 create_seq_entry("partitions", 0, &proc_partitions_operations);
David Howells93614012006-09-30 20:45:40 +0200708#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 create_seq_entry("stat", 0, &proc_stat_operations);
710 create_seq_entry("interrupts", 0, &proc_interrupts_operations);
Matt Mackall10cef602006-01-08 01:01:45 -0800711#ifdef CONFIG_SLAB
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
Al Viro871751e2006-03-25 03:06:39 -0800713#ifdef CONFIG_DEBUG_SLAB_LEAK
714 create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
715#endif
Matt Mackall10cef602006-01-08 01:01:45 -0800716#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
718 create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
Nikita Danilov295ab932005-06-21 17:14:38 -0700719 create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
David Howells93614012006-09-30 20:45:40 +0200720#ifdef CONFIG_BLOCK
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 create_seq_entry("diskstats", 0, &proc_diskstats_operations);
David Howells93614012006-09-30 20:45:40 +0200722#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723#ifdef CONFIG_MODULES
724 create_seq_entry("modules", 0, &proc_modules_operations);
725#endif
726#ifdef CONFIG_SCHEDSTATS
727 create_seq_entry("schedstat", 0, &proc_schedstat_operations);
728#endif
729#ifdef CONFIG_PROC_KCORE
730 proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
731 if (proc_root_kcore) {
732 proc_root_kcore->proc_fops = &proc_kcore_operations;
733 proc_root_kcore->size =
734 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
735 }
736#endif
Vivek Goyal666bfdd2005-06-25 14:58:21 -0700737#ifdef CONFIG_PROC_VMCORE
738 proc_vmcore = create_proc_entry("vmcore", S_IRUSR, NULL);
739 if (proc_vmcore)
740 proc_vmcore->proc_fops = &proc_vmcore_operations;
741#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742#ifdef CONFIG_MAGIC_SYSRQ
743 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
744 if (entry)
745 entry->proc_fops = &proc_sysrq_trigger_operations;
746#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747}