Unevictable LRU Page Statistics
[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/quicklist.h>
28 #include <linux/proc_fs.h>
29 #include <linux/ioport.h>
30 #include <linux/mm.h>
31 #include <linux/mmzone.h>
32 #include <linux/pagemap.h>
33 #include <linux/interrupt.h>
34 #include <linux/swap.h>
35 #include <linux/slab.h>
36 #include <linux/genhd.h>
37 #include <linux/smp.h>
38 #include <linux/signal.h>
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/seq_file.h>
42 #include <linux/times.h>
43 #include <linux/profile.h>
44 #include <linux/utsname.h>
45 #include <linux/blkdev.h>
46 #include <linux/hugetlb.h>
47 #include <linux/jiffies.h>
48 #include <linux/vmalloc.h>
49 #include <linux/crash_dump.h>
50 #include <linux/pid_namespace.h>
51 #include <linux/bootmem.h>
52 #include <asm/uaccess.h>
53 #include <asm/pgtable.h>
54 #include <asm/io.h>
55 #include <asm/tlb.h>
56 #include <asm/div64.h>
57 #include "internal.h"
58
59 #define LOAD_INT(x) ((x) >> FSHIFT)
60 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
61 /*
62  * Warning: stuff below (imported functions) assumes that its output will fit
63  * into one page. For some of those functions it may be wrong. Moreover, we
64  * have a way to deal with that gracefully. Right now I used straightforward
65  * wrappers, but this needs further analysis wrt potential overflows.
66  */
67 extern int get_hardware_list(char *);
68 extern int get_stram_list(char *);
69 extern int get_exec_domain_list(char *);
70
71 static 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
82 static 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         unsigned long seq;
88
89         do {
90                 seq = read_seqbegin(&xtime_lock);
91                 a = avenrun[0] + (FIXED_1/200);
92                 b = avenrun[1] + (FIXED_1/200);
93                 c = avenrun[2] + (FIXED_1/200);
94         } while (read_seqretry(&xtime_lock, seq));
95
96         len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
97                 LOAD_INT(a), LOAD_FRAC(a),
98                 LOAD_INT(b), LOAD_FRAC(b),
99                 LOAD_INT(c), LOAD_FRAC(c),
100                 nr_running(), nr_threads,
101                 task_active_pid_ns(current)->last_pid);
102         return proc_calc_metrics(page, start, off, count, eof, len);
103 }
104
105 static int uptime_read_proc(char *page, char **start, off_t off,
106                                  int count, int *eof, void *data)
107 {
108         struct timespec uptime;
109         struct timespec idle;
110         int len;
111         cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
112
113         do_posix_clock_monotonic_gettime(&uptime);
114         monotonic_to_bootbased(&uptime);
115         cputime_to_timespec(idletime, &idle);
116         len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
117                         (unsigned long) uptime.tv_sec,
118                         (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
119                         (unsigned long) idle.tv_sec,
120                         (idle.tv_nsec / (NSEC_PER_SEC / 100)));
121
122         return proc_calc_metrics(page, start, off, count, eof, len);
123 }
124
125 int __attribute__((weak)) arch_report_meminfo(char *page)
126 {
127         return 0;
128 }
129
130 static int meminfo_read_proc(char *page, char **start, off_t off,
131                                  int count, int *eof, void *data)
132 {
133         struct sysinfo i;
134         int len;
135         unsigned long committed;
136         unsigned long allowed;
137         struct vmalloc_info vmi;
138         long cached;
139         unsigned long pages[NR_LRU_LISTS];
140         int lru;
141
142 /*
143  * display in kilobytes.
144  */
145 #define K(x) ((x) << (PAGE_SHIFT - 10))
146         si_meminfo(&i);
147         si_swapinfo(&i);
148         committed = atomic_long_read(&vm_committed_space);
149         allowed = ((totalram_pages - hugetlb_total_pages())
150                 * sysctl_overcommit_ratio / 100) + total_swap_pages;
151
152         cached = global_page_state(NR_FILE_PAGES) -
153                         total_swapcache_pages - i.bufferram;
154         if (cached < 0)
155                 cached = 0;
156
157         get_vmalloc_info(&vmi);
158
159         for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
160                 pages[lru] = global_page_state(NR_LRU_BASE + lru);
161
162         /*
163          * Tagged format, for easy grepping and expansion.
164          */
165         len = sprintf(page,
166                 "MemTotal:       %8lu kB\n"
167                 "MemFree:        %8lu kB\n"
168                 "Buffers:        %8lu kB\n"
169                 "Cached:         %8lu kB\n"
170                 "SwapCached:     %8lu kB\n"
171                 "Active:         %8lu kB\n"
172                 "Inactive:       %8lu kB\n"
173                 "Active(anon):   %8lu kB\n"
174                 "Inactive(anon): %8lu kB\n"
175                 "Active(file):   %8lu kB\n"
176                 "Inactive(file): %8lu kB\n"
177 #ifdef CONFIG_UNEVICTABLE_LRU
178                 "Unevictable:    %8lu kB\n"
179 #endif
180 #ifdef CONFIG_HIGHMEM
181                 "HighTotal:      %8lu kB\n"
182                 "HighFree:       %8lu kB\n"
183                 "LowTotal:       %8lu kB\n"
184                 "LowFree:        %8lu kB\n"
185 #endif
186                 "SwapTotal:      %8lu kB\n"
187                 "SwapFree:       %8lu kB\n"
188                 "Dirty:          %8lu kB\n"
189                 "Writeback:      %8lu kB\n"
190                 "AnonPages:      %8lu kB\n"
191                 "Mapped:         %8lu kB\n"
192                 "Slab:           %8lu kB\n"
193                 "SReclaimable:   %8lu kB\n"
194                 "SUnreclaim:     %8lu kB\n"
195                 "PageTables:     %8lu kB\n"
196 #ifdef CONFIG_QUICKLIST
197                 "Quicklists:     %8lu kB\n"
198 #endif
199                 "NFS_Unstable:   %8lu kB\n"
200                 "Bounce:         %8lu kB\n"
201                 "WritebackTmp:   %8lu kB\n"
202                 "CommitLimit:    %8lu kB\n"
203                 "Committed_AS:   %8lu kB\n"
204                 "VmallocTotal:   %8lu kB\n"
205                 "VmallocUsed:    %8lu kB\n"
206                 "VmallocChunk:   %8lu kB\n",
207                 K(i.totalram),
208                 K(i.freeram),
209                 K(i.bufferram),
210                 K(cached),
211                 K(total_swapcache_pages),
212                 K(pages[LRU_ACTIVE_ANON]   + pages[LRU_ACTIVE_FILE]),
213                 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
214                 K(pages[LRU_ACTIVE_ANON]),
215                 K(pages[LRU_INACTIVE_ANON]),
216                 K(pages[LRU_ACTIVE_FILE]),
217                 K(pages[LRU_INACTIVE_FILE]),
218 #ifdef CONFIG_UNEVICTABLE_LRU
219                 K(pages[LRU_UNEVICTABLE]),
220 #endif
221 #ifdef CONFIG_HIGHMEM
222                 K(i.totalhigh),
223                 K(i.freehigh),
224                 K(i.totalram-i.totalhigh),
225                 K(i.freeram-i.freehigh),
226 #endif
227                 K(i.totalswap),
228                 K(i.freeswap),
229                 K(global_page_state(NR_FILE_DIRTY)),
230                 K(global_page_state(NR_WRITEBACK)),
231                 K(global_page_state(NR_ANON_PAGES)),
232                 K(global_page_state(NR_FILE_MAPPED)),
233                 K(global_page_state(NR_SLAB_RECLAIMABLE) +
234                                 global_page_state(NR_SLAB_UNRECLAIMABLE)),
235                 K(global_page_state(NR_SLAB_RECLAIMABLE)),
236                 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
237                 K(global_page_state(NR_PAGETABLE)),
238 #ifdef CONFIG_QUICKLIST
239                 K(quicklist_total_size()),
240 #endif
241                 K(global_page_state(NR_UNSTABLE_NFS)),
242                 K(global_page_state(NR_BOUNCE)),
243                 K(global_page_state(NR_WRITEBACK_TEMP)),
244                 K(allowed),
245                 K(committed),
246                 (unsigned long)VMALLOC_TOTAL >> 10,
247                 vmi.used >> 10,
248                 vmi.largest_chunk >> 10
249                 );
250
251                 len += hugetlb_report_meminfo(page + len);
252
253         len += arch_report_meminfo(page + len);
254
255         return proc_calc_metrics(page, start, off, count, eof, len);
256 #undef K
257 }
258
259 static int fragmentation_open(struct inode *inode, struct file *file)
260 {
261         (void)inode;
262         return seq_open(file, &fragmentation_op);
263 }
264
265 static const struct file_operations fragmentation_file_operations = {
266         .open           = fragmentation_open,
267         .read           = seq_read,
268         .llseek         = seq_lseek,
269         .release        = seq_release,
270 };
271
272 static int pagetypeinfo_open(struct inode *inode, struct file *file)
273 {
274         return seq_open(file, &pagetypeinfo_op);
275 }
276
277 static const struct file_operations pagetypeinfo_file_ops = {
278         .open           = pagetypeinfo_open,
279         .read           = seq_read,
280         .llseek         = seq_lseek,
281         .release        = seq_release,
282 };
283
284 static int zoneinfo_open(struct inode *inode, struct file *file)
285 {
286         return seq_open(file, &zoneinfo_op);
287 }
288
289 static const struct file_operations proc_zoneinfo_file_operations = {
290         .open           = zoneinfo_open,
291         .read           = seq_read,
292         .llseek         = seq_lseek,
293         .release        = seq_release,
294 };
295
296 static int version_read_proc(char *page, char **start, off_t off,
297                                  int count, int *eof, void *data)
298 {
299         int len;
300
301         len = snprintf(page, PAGE_SIZE, linux_proc_banner,
302                 utsname()->sysname,
303                 utsname()->release,
304                 utsname()->version);
305         return proc_calc_metrics(page, start, off, count, eof, len);
306 }
307
308 extern const struct seq_operations cpuinfo_op;
309 static int cpuinfo_open(struct inode *inode, struct file *file)
310 {
311         return seq_open(file, &cpuinfo_op);
312 }
313
314 static const struct file_operations proc_cpuinfo_operations = {
315         .open           = cpuinfo_open,
316         .read           = seq_read,
317         .llseek         = seq_lseek,
318         .release        = seq_release,
319 };
320
321 static int devinfo_show(struct seq_file *f, void *v)
322 {
323         int i = *(loff_t *) v;
324
325         if (i < CHRDEV_MAJOR_HASH_SIZE) {
326                 if (i == 0)
327                         seq_printf(f, "Character devices:\n");
328                 chrdev_show(f, i);
329         }
330 #ifdef CONFIG_BLOCK
331         else {
332                 i -= CHRDEV_MAJOR_HASH_SIZE;
333                 if (i == 0)
334                         seq_printf(f, "\nBlock devices:\n");
335                 blkdev_show(f, i);
336         }
337 #endif
338         return 0;
339 }
340
341 static void *devinfo_start(struct seq_file *f, loff_t *pos)
342 {
343         if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
344                 return pos;
345         return NULL;
346 }
347
348 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
349 {
350         (*pos)++;
351         if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
352                 return NULL;
353         return pos;
354 }
355
356 static void devinfo_stop(struct seq_file *f, void *v)
357 {
358         /* Nothing to do */
359 }
360
361 static const struct seq_operations devinfo_ops = {
362         .start = devinfo_start,
363         .next  = devinfo_next,
364         .stop  = devinfo_stop,
365         .show  = devinfo_show
366 };
367
368 static int devinfo_open(struct inode *inode, struct file *filp)
369 {
370         return seq_open(filp, &devinfo_ops);
371 }
372
373 static const struct file_operations proc_devinfo_operations = {
374         .open           = devinfo_open,
375         .read           = seq_read,
376         .llseek         = seq_lseek,
377         .release        = seq_release,
378 };
379
380 static int vmstat_open(struct inode *inode, struct file *file)
381 {
382         return seq_open(file, &vmstat_op);
383 }
384 static const struct file_operations proc_vmstat_file_operations = {
385         .open           = vmstat_open,
386         .read           = seq_read,
387         .llseek         = seq_lseek,
388         .release        = seq_release,
389 };
390
391 #ifdef CONFIG_PROC_HARDWARE
392 static int hardware_read_proc(char *page, char **start, off_t off,
393                                  int count, int *eof, void *data)
394 {
395         int len = get_hardware_list(page);
396         return proc_calc_metrics(page, start, off, count, eof, len);
397 }
398 #endif
399
400 #ifdef CONFIG_STRAM_PROC
401 static int stram_read_proc(char *page, char **start, off_t off,
402                                  int count, int *eof, void *data)
403 {
404         int len = get_stram_list(page);
405         return proc_calc_metrics(page, start, off, count, eof, len);
406 }
407 #endif
408
409 #ifdef CONFIG_BLOCK
410 static int partitions_open(struct inode *inode, struct file *file)
411 {
412         return seq_open(file, &partitions_op);
413 }
414 static const struct file_operations proc_partitions_operations = {
415         .open           = partitions_open,
416         .read           = seq_read,
417         .llseek         = seq_lseek,
418         .release        = seq_release,
419 };
420
421 static int diskstats_open(struct inode *inode, struct file *file)
422 {
423         return seq_open(file, &diskstats_op);
424 }
425 static const struct file_operations proc_diskstats_operations = {
426         .open           = diskstats_open,
427         .read           = seq_read,
428         .llseek         = seq_lseek,
429         .release        = seq_release,
430 };
431 #endif
432
433 #ifdef CONFIG_MODULES
434 extern const struct seq_operations modules_op;
435 static int modules_open(struct inode *inode, struct file *file)
436 {
437         return seq_open(file, &modules_op);
438 }
439 static const struct file_operations proc_modules_operations = {
440         .open           = modules_open,
441         .read           = seq_read,
442         .llseek         = seq_lseek,
443         .release        = seq_release,
444 };
445 #endif
446
447 #ifdef CONFIG_SLABINFO
448 static int slabinfo_open(struct inode *inode, struct file *file)
449 {
450         return seq_open(file, &slabinfo_op);
451 }
452 static const struct file_operations proc_slabinfo_operations = {
453         .open           = slabinfo_open,
454         .read           = seq_read,
455         .write          = slabinfo_write,
456         .llseek         = seq_lseek,
457         .release        = seq_release,
458 };
459
460 #ifdef CONFIG_DEBUG_SLAB_LEAK
461 extern const struct seq_operations slabstats_op;
462 static int slabstats_open(struct inode *inode, struct file *file)
463 {
464         unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
465         int ret = -ENOMEM;
466         if (n) {
467                 ret = seq_open(file, &slabstats_op);
468                 if (!ret) {
469                         struct seq_file *m = file->private_data;
470                         *n = PAGE_SIZE / (2 * sizeof(unsigned long));
471                         m->private = n;
472                         n = NULL;
473                 }
474                 kfree(n);
475         }
476         return ret;
477 }
478
479 static const struct file_operations proc_slabstats_operations = {
480         .open           = slabstats_open,
481         .read           = seq_read,
482         .llseek         = seq_lseek,
483         .release        = seq_release_private,
484 };
485 #endif
486 #endif
487
488 #ifdef CONFIG_MMU
489 static int vmalloc_open(struct inode *inode, struct file *file)
490 {
491         unsigned int *ptr = NULL;
492         int ret;
493
494         if (NUMA_BUILD)
495                 ptr = kmalloc(nr_node_ids * sizeof(unsigned int), GFP_KERNEL);
496         ret = seq_open(file, &vmalloc_op);
497         if (!ret) {
498                 struct seq_file *m = file->private_data;
499                 m->private = ptr;
500         } else
501                 kfree(ptr);
502         return ret;
503 }
504
505 static const struct file_operations proc_vmalloc_operations = {
506         .open           = vmalloc_open,
507         .read           = seq_read,
508         .llseek         = seq_lseek,
509         .release        = seq_release_private,
510 };
511 #endif
512
513 #ifndef arch_irq_stat_cpu
514 #define arch_irq_stat_cpu(cpu) 0
515 #endif
516 #ifndef arch_irq_stat
517 #define arch_irq_stat() 0
518 #endif
519
520 static int show_stat(struct seq_file *p, void *v)
521 {
522         int i;
523         unsigned long jif;
524         cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
525         cputime64_t guest;
526         u64 sum = 0;
527         struct timespec boottime;
528         unsigned int *per_irq_sum;
529
530         per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL);
531         if (!per_irq_sum)
532                 return -ENOMEM;
533
534         user = nice = system = idle = iowait =
535                 irq = softirq = steal = cputime64_zero;
536         guest = cputime64_zero;
537         getboottime(&boottime);
538         jif = boottime.tv_sec;
539
540         for_each_possible_cpu(i) {
541                 int j;
542
543                 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
544                 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
545                 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
546                 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
547                 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
548                 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
549                 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
550                 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
551                 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
552                 for (j = 0; j < NR_IRQS; j++) {
553                         unsigned int temp = kstat_cpu(i).irqs[j];
554                         sum += temp;
555                         per_irq_sum[j] += temp;
556                 }
557                 sum += arch_irq_stat_cpu(i);
558         }
559         sum += arch_irq_stat();
560
561         seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
562                 (unsigned long long)cputime64_to_clock_t(user),
563                 (unsigned long long)cputime64_to_clock_t(nice),
564                 (unsigned long long)cputime64_to_clock_t(system),
565                 (unsigned long long)cputime64_to_clock_t(idle),
566                 (unsigned long long)cputime64_to_clock_t(iowait),
567                 (unsigned long long)cputime64_to_clock_t(irq),
568                 (unsigned long long)cputime64_to_clock_t(softirq),
569                 (unsigned long long)cputime64_to_clock_t(steal),
570                 (unsigned long long)cputime64_to_clock_t(guest));
571         for_each_online_cpu(i) {
572
573                 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
574                 user = kstat_cpu(i).cpustat.user;
575                 nice = kstat_cpu(i).cpustat.nice;
576                 system = kstat_cpu(i).cpustat.system;
577                 idle = kstat_cpu(i).cpustat.idle;
578                 iowait = kstat_cpu(i).cpustat.iowait;
579                 irq = kstat_cpu(i).cpustat.irq;
580                 softirq = kstat_cpu(i).cpustat.softirq;
581                 steal = kstat_cpu(i).cpustat.steal;
582                 guest = kstat_cpu(i).cpustat.guest;
583                 seq_printf(p,
584                         "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
585                         i,
586                         (unsigned long long)cputime64_to_clock_t(user),
587                         (unsigned long long)cputime64_to_clock_t(nice),
588                         (unsigned long long)cputime64_to_clock_t(system),
589                         (unsigned long long)cputime64_to_clock_t(idle),
590                         (unsigned long long)cputime64_to_clock_t(iowait),
591                         (unsigned long long)cputime64_to_clock_t(irq),
592                         (unsigned long long)cputime64_to_clock_t(softirq),
593                         (unsigned long long)cputime64_to_clock_t(steal),
594                         (unsigned long long)cputime64_to_clock_t(guest));
595         }
596         seq_printf(p, "intr %llu", (unsigned long long)sum);
597
598         for (i = 0; i < NR_IRQS; i++)
599                 seq_printf(p, " %u", per_irq_sum[i]);
600
601         seq_printf(p,
602                 "\nctxt %llu\n"
603                 "btime %lu\n"
604                 "processes %lu\n"
605                 "procs_running %lu\n"
606                 "procs_blocked %lu\n",
607                 nr_context_switches(),
608                 (unsigned long)jif,
609                 total_forks,
610                 nr_running(),
611                 nr_iowait());
612
613         kfree(per_irq_sum);
614         return 0;
615 }
616
617 static int stat_open(struct inode *inode, struct file *file)
618 {
619         unsigned size = 4096 * (1 + num_possible_cpus() / 32);
620         char *buf;
621         struct seq_file *m;
622         int res;
623
624         /* don't ask for more than the kmalloc() max size, currently 128 KB */
625         if (size > 128 * 1024)
626                 size = 128 * 1024;
627         buf = kmalloc(size, GFP_KERNEL);
628         if (!buf)
629                 return -ENOMEM;
630
631         res = single_open(file, show_stat, NULL);
632         if (!res) {
633                 m = file->private_data;
634                 m->buf = buf;
635                 m->size = size;
636         } else
637                 kfree(buf);
638         return res;
639 }
640 static const struct file_operations proc_stat_operations = {
641         .open           = stat_open,
642         .read           = seq_read,
643         .llseek         = seq_lseek,
644         .release        = single_release,
645 };
646
647 /*
648  * /proc/interrupts
649  */
650 static void *int_seq_start(struct seq_file *f, loff_t *pos)
651 {
652         return (*pos <= NR_IRQS) ? pos : NULL;
653 }
654
655 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
656 {
657         (*pos)++;
658         if (*pos > NR_IRQS)
659                 return NULL;
660         return pos;
661 }
662
663 static void int_seq_stop(struct seq_file *f, void *v)
664 {
665         /* Nothing to do */
666 }
667
668
669 static const struct seq_operations int_seq_ops = {
670         .start = int_seq_start,
671         .next  = int_seq_next,
672         .stop  = int_seq_stop,
673         .show  = show_interrupts
674 };
675
676 static int interrupts_open(struct inode *inode, struct file *filp)
677 {
678         return seq_open(filp, &int_seq_ops);
679 }
680
681 static const struct file_operations proc_interrupts_operations = {
682         .open           = interrupts_open,
683         .read           = seq_read,
684         .llseek         = seq_lseek,
685         .release        = seq_release,
686 };
687
688 static int filesystems_read_proc(char *page, char **start, off_t off,
689                                  int count, int *eof, void *data)
690 {
691         int len = get_filesystem_list(page);
692         return proc_calc_metrics(page, start, off, count, eof, len);
693 }
694
695 static int cmdline_read_proc(char *page, char **start, off_t off,
696                                  int count, int *eof, void *data)
697 {
698         int len;
699
700         len = sprintf(page, "%s\n", saved_command_line);
701         return proc_calc_metrics(page, start, off, count, eof, len);
702 }
703
704 #ifdef CONFIG_FILE_LOCKING
705 static int locks_open(struct inode *inode, struct file *filp)
706 {
707         return seq_open(filp, &locks_seq_operations);
708 }
709
710 static const struct file_operations proc_locks_operations = {
711         .open           = locks_open,
712         .read           = seq_read,
713         .llseek         = seq_lseek,
714         .release        = seq_release,
715 };
716 #endif /* CONFIG_FILE_LOCKING */
717
718 static int execdomains_read_proc(char *page, char **start, off_t off,
719                                  int count, int *eof, void *data)
720 {
721         int len = get_exec_domain_list(page);
722         return proc_calc_metrics(page, start, off, count, eof, len);
723 }
724
725 #ifdef CONFIG_PROC_PAGE_MONITOR
726 #define KPMSIZE sizeof(u64)
727 #define KPMMASK (KPMSIZE - 1)
728 /* /proc/kpagecount - an array exposing page counts
729  *
730  * Each entry is a u64 representing the corresponding
731  * physical page count.
732  */
733 static ssize_t kpagecount_read(struct file *file, char __user *buf,
734                              size_t count, loff_t *ppos)
735 {
736         u64 __user *out = (u64 __user *)buf;
737         struct page *ppage;
738         unsigned long src = *ppos;
739         unsigned long pfn;
740         ssize_t ret = 0;
741         u64 pcount;
742
743         pfn = src / KPMSIZE;
744         count = min_t(size_t, count, (max_pfn * KPMSIZE) - src);
745         if (src & KPMMASK || count & KPMMASK)
746                 return -EINVAL;
747
748         while (count > 0) {
749                 ppage = NULL;
750                 if (pfn_valid(pfn))
751                         ppage = pfn_to_page(pfn);
752                 pfn++;
753                 if (!ppage)
754                         pcount = 0;
755                 else
756                         pcount = page_mapcount(ppage);
757
758                 if (put_user(pcount, out++)) {
759                         ret = -EFAULT;
760                         break;
761                 }
762
763                 count -= KPMSIZE;
764         }
765
766         *ppos += (char __user *)out - buf;
767         if (!ret)
768                 ret = (char __user *)out - buf;
769         return ret;
770 }
771
772 static struct file_operations proc_kpagecount_operations = {
773         .llseek = mem_lseek,
774         .read = kpagecount_read,
775 };
776
777 /* /proc/kpageflags - an array exposing page flags
778  *
779  * Each entry is a u64 representing the corresponding
780  * physical page flags.
781  */
782
783 /* These macros are used to decouple internal flags from exported ones */
784
785 #define KPF_LOCKED     0
786 #define KPF_ERROR      1
787 #define KPF_REFERENCED 2
788 #define KPF_UPTODATE   3
789 #define KPF_DIRTY      4
790 #define KPF_LRU        5
791 #define KPF_ACTIVE     6
792 #define KPF_SLAB       7
793 #define KPF_WRITEBACK  8
794 #define KPF_RECLAIM    9
795 #define KPF_BUDDY     10
796
797 #define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos)
798
799 static ssize_t kpageflags_read(struct file *file, char __user *buf,
800                              size_t count, loff_t *ppos)
801 {
802         u64 __user *out = (u64 __user *)buf;
803         struct page *ppage;
804         unsigned long src = *ppos;
805         unsigned long pfn;
806         ssize_t ret = 0;
807         u64 kflags, uflags;
808
809         pfn = src / KPMSIZE;
810         count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src);
811         if (src & KPMMASK || count & KPMMASK)
812                 return -EINVAL;
813
814         while (count > 0) {
815                 ppage = NULL;
816                 if (pfn_valid(pfn))
817                         ppage = pfn_to_page(pfn);
818                 pfn++;
819                 if (!ppage)
820                         kflags = 0;
821                 else
822                         kflags = ppage->flags;
823
824                 uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) |
825                         kpf_copy_bit(kflags, KPF_ERROR, PG_error) |
826                         kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) |
827                         kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) |
828                         kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) |
829                         kpf_copy_bit(kflags, KPF_LRU, PG_lru) |
830                         kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) |
831                         kpf_copy_bit(kflags, KPF_SLAB, PG_slab) |
832                         kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) |
833                         kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) |
834                         kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy);
835
836                 if (put_user(uflags, out++)) {
837                         ret = -EFAULT;
838                         break;
839                 }
840
841                 count -= KPMSIZE;
842         }
843
844         *ppos += (char __user *)out - buf;
845         if (!ret)
846                 ret = (char __user *)out - buf;
847         return ret;
848 }
849
850 static struct file_operations proc_kpageflags_operations = {
851         .llseek = mem_lseek,
852         .read = kpageflags_read,
853 };
854 #endif /* CONFIG_PROC_PAGE_MONITOR */
855
856 struct proc_dir_entry *proc_root_kcore;
857
858 void __init proc_misc_init(void)
859 {
860         static struct {
861                 char *name;
862                 int (*read_proc)(char*,char**,off_t,int,int*,void*);
863         } *p, simple_ones[] = {
864                 {"loadavg",     loadavg_read_proc},
865                 {"uptime",      uptime_read_proc},
866                 {"meminfo",     meminfo_read_proc},
867                 {"version",     version_read_proc},
868 #ifdef CONFIG_PROC_HARDWARE
869                 {"hardware",    hardware_read_proc},
870 #endif
871 #ifdef CONFIG_STRAM_PROC
872                 {"stram",       stram_read_proc},
873 #endif
874                 {"filesystems", filesystems_read_proc},
875                 {"cmdline",     cmdline_read_proc},
876                 {"execdomains", execdomains_read_proc},
877                 {NULL,}
878         };
879         for (p = simple_ones; p->name; p++)
880                 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
881
882         proc_symlink("mounts", NULL, "self/mounts");
883
884         /* And now for trickier ones */
885 #ifdef CONFIG_PRINTK
886         proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations);
887 #endif
888 #ifdef CONFIG_FILE_LOCKING
889         proc_create("locks", 0, NULL, &proc_locks_operations);
890 #endif
891         proc_create("devices", 0, NULL, &proc_devinfo_operations);
892         proc_create("cpuinfo", 0, NULL, &proc_cpuinfo_operations);
893 #ifdef CONFIG_BLOCK
894         proc_create("partitions", 0, NULL, &proc_partitions_operations);
895 #endif
896         proc_create("stat", 0, NULL, &proc_stat_operations);
897         proc_create("interrupts", 0, NULL, &proc_interrupts_operations);
898 #ifdef CONFIG_SLABINFO
899         proc_create("slabinfo",S_IWUSR|S_IRUGO,NULL,&proc_slabinfo_operations);
900 #ifdef CONFIG_DEBUG_SLAB_LEAK
901         proc_create("slab_allocators", 0, NULL, &proc_slabstats_operations);
902 #endif
903 #endif
904 #ifdef CONFIG_MMU
905         proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations);
906 #endif
907         proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
908         proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops);
909         proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations);
910         proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations);
911 #ifdef CONFIG_BLOCK
912         proc_create("diskstats", 0, NULL, &proc_diskstats_operations);
913 #endif
914 #ifdef CONFIG_MODULES
915         proc_create("modules", 0, NULL, &proc_modules_operations);
916 #endif
917 #ifdef CONFIG_SCHEDSTATS
918         proc_create("schedstat", 0, NULL, &proc_schedstat_operations);
919 #endif
920 #ifdef CONFIG_PROC_KCORE
921         proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations);
922         if (proc_root_kcore)
923                 proc_root_kcore->size =
924                                 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
925 #endif
926 #ifdef CONFIG_PROC_PAGE_MONITOR
927         proc_create("kpagecount", S_IRUSR, NULL, &proc_kpagecount_operations);
928         proc_create("kpageflags", S_IRUSR, NULL, &proc_kpageflags_operations);
929 #endif
930 #ifdef CONFIG_PROC_VMCORE
931         proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
932 #endif
933 }