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[SCSI] aic79xx: user visible misuse wrong SI units (not disk size!)
[linux-2.6/sactl.git] / fs / proc / proc_misc.c
blob59ea42e1ef03a0a4acdf3f73283d913b740415fd
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
140 /*
141 * display in kilobytes.
142 */
143 #define K(x) ((x) << (PAGE_SHIFT - 10))
144 si_meminfo(&i);
145 si_swapinfo(&i);
146 committed = atomic_long_read(&vm_committed_space);
147 allowed = ((totalram_pages - hugetlb_total_pages())
148 * sysctl_overcommit_ratio / 100) + total_swap_pages;
149
150 cached = global_page_state(NR_FILE_PAGES) -
151 total_swapcache_pages - i.bufferram;
152 if (cached < 0)
153 cached = 0;
154
155 get_vmalloc_info(&vmi);
156
157 /*
158 * Tagged format, for easy grepping and expansion.
159 */
160 len = sprintf(page,
161 "MemTotal: %8lu kB\n"
162 "MemFree: %8lu kB\n"
163 "Buffers: %8lu kB\n"
164 "Cached: %8lu kB\n"
165 "SwapCached: %8lu kB\n"
166 "Active: %8lu kB\n"
167 "Inactive: %8lu kB\n"
168 #ifdef CONFIG_HIGHMEM
169 "HighTotal: %8lu kB\n"
170 "HighFree: %8lu kB\n"
171 "LowTotal: %8lu kB\n"
172 "LowFree: %8lu kB\n"
173 #endif
174 "SwapTotal: %8lu kB\n"
175 "SwapFree: %8lu kB\n"
176 "Dirty: %8lu kB\n"
177 "Writeback: %8lu kB\n"
178 "AnonPages: %8lu kB\n"
179 "Mapped: %8lu kB\n"
180 "Slab: %8lu kB\n"
181 "SReclaimable: %8lu kB\n"
182 "SUnreclaim: %8lu kB\n"
183 "PageTables: %8lu kB\n"
184 #ifdef CONFIG_QUICKLIST
185 "Quicklists: %8lu kB\n"
186 #endif
187 "NFS_Unstable: %8lu kB\n"
188 "Bounce: %8lu kB\n"
189 "WritebackTmp: %8lu kB\n"
190 "CommitLimit: %8lu kB\n"
191 "Committed_AS: %8lu kB\n"
192 "VmallocTotal: %8lu kB\n"
193 "VmallocUsed: %8lu kB\n"
194 "VmallocChunk: %8lu kB\n",
195 K(i.totalram),
196 K(i.freeram),
197 K(i.bufferram),
198 K(cached),
199 K(total_swapcache_pages),
200 K(global_page_state(NR_ACTIVE)),
201 K(global_page_state(NR_INACTIVE)),
202 #ifdef CONFIG_HIGHMEM
203 K(i.totalhigh),
204 K(i.freehigh),
205 K(i.totalram-i.totalhigh),
206 K(i.freeram-i.freehigh),
207 #endif
208 K(i.totalswap),
209 K(i.freeswap),
210 K(global_page_state(NR_FILE_DIRTY)),
211 K(global_page_state(NR_WRITEBACK)),
212 K(global_page_state(NR_ANON_PAGES)),
213 K(global_page_state(NR_FILE_MAPPED)),
214 K(global_page_state(NR_SLAB_RECLAIMABLE) +
215 global_page_state(NR_SLAB_UNRECLAIMABLE)),
216 K(global_page_state(NR_SLAB_RECLAIMABLE)),
217 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
218 K(global_page_state(NR_PAGETABLE)),
219 #ifdef CONFIG_QUICKLIST
220 K(quicklist_total_size()),
221 #endif
222 K(global_page_state(NR_UNSTABLE_NFS)),
223 K(global_page_state(NR_BOUNCE)),
224 K(global_page_state(NR_WRITEBACK_TEMP)),
225 K(allowed),
226 K(committed),
227 (unsigned long)VMALLOC_TOTAL >> 10,
228 vmi.used >> 10,
229 vmi.largest_chunk >> 10
230 );
231
232 len += hugetlb_report_meminfo(page + len);
233
234 len += arch_report_meminfo(page + len);
235
236 return proc_calc_metrics(page, start, off, count, eof, len);
237 #undef K
238 }
239
240 static int fragmentation_open(struct inode *inode, struct file *file)
241 {
242 (void)inode;
243 return seq_open(file, &fragmentation_op);
244 }
245
246 static const struct file_operations fragmentation_file_operations = {
247 .open = fragmentation_open,
248 .read = seq_read,
249 .llseek = seq_lseek,
250 .release = seq_release,
251 };
252
253 static int pagetypeinfo_open(struct inode *inode, struct file *file)
254 {
255 return seq_open(file, &pagetypeinfo_op);
256 }
257
258 static const struct file_operations pagetypeinfo_file_ops = {
259 .open = pagetypeinfo_open,
260 .read = seq_read,
261 .llseek = seq_lseek,
262 .release = seq_release,
263 };
264
265 static int zoneinfo_open(struct inode *inode, struct file *file)
266 {
267 return seq_open(file, &zoneinfo_op);
268 }
269
270 static const struct file_operations proc_zoneinfo_file_operations = {
271 .open = zoneinfo_open,
272 .read = seq_read,
273 .llseek = seq_lseek,
274 .release = seq_release,
275 };
276
277 static int version_read_proc(char *page, char **start, off_t off,
278 int count, int *eof, void *data)
279 {
280 int len;
281
282 len = snprintf(page, PAGE_SIZE, linux_proc_banner,
283 utsname()->sysname,
284 utsname()->release,
285 utsname()->version);
286 return proc_calc_metrics(page, start, off, count, eof, len);
287 }
288
289 extern const struct seq_operations cpuinfo_op;
290 static int cpuinfo_open(struct inode *inode, struct file *file)
291 {
292 return seq_open(file, &cpuinfo_op);
293 }
294
295 static const struct file_operations proc_cpuinfo_operations = {
296 .open = cpuinfo_open,
297 .read = seq_read,
298 .llseek = seq_lseek,
299 .release = seq_release,
300 };
301
302 static int devinfo_show(struct seq_file *f, void *v)
303 {
304 int i = *(loff_t *) v;
305
306 if (i < CHRDEV_MAJOR_HASH_SIZE) {
307 if (i == 0)
308 seq_printf(f, "Character devices:\n");
309 chrdev_show(f, i);
310 }
311 #ifdef CONFIG_BLOCK
312 else {
313 i -= CHRDEV_MAJOR_HASH_SIZE;
314 if (i == 0)
315 seq_printf(f, "\nBlock devices:\n");
316 blkdev_show(f, i);
317 }
318 #endif
319 return 0;
320 }
321
322 static void *devinfo_start(struct seq_file *f, loff_t *pos)
323 {
324 if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
325 return pos;
326 return NULL;
327 }
328
329 static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
330 {
331 (*pos)++;
332 if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
333 return NULL;
334 return pos;
335 }
336
337 static void devinfo_stop(struct seq_file *f, void *v)
338 {
339 /* Nothing to do */
340 }
341
342 static const struct seq_operations devinfo_ops = {
343 .start = devinfo_start,
344 .next = devinfo_next,
345 .stop = devinfo_stop,
346 .show = devinfo_show
347 };
348
349 static int devinfo_open(struct inode *inode, struct file *filp)
350 {
351 return seq_open(filp, &devinfo_ops);
352 }
353
354 static const struct file_operations proc_devinfo_operations = {
355 .open = devinfo_open,
356 .read = seq_read,
357 .llseek = seq_lseek,
358 .release = seq_release,
359 };
360
361 static int vmstat_open(struct inode *inode, struct file *file)
362 {
363 return seq_open(file, &vmstat_op);
364 }
365 static const struct file_operations proc_vmstat_file_operations = {
366 .open = vmstat_open,
367 .read = seq_read,
368 .llseek = seq_lseek,
369 .release = seq_release,
370 };
371
372 #ifdef CONFIG_PROC_HARDWARE
373 static int hardware_read_proc(char *page, char **start, off_t off,
374 int count, int *eof, void *data)
375 {
376 int len = get_hardware_list(page);
377 return proc_calc_metrics(page, start, off, count, eof, len);
378 }
379 #endif
380
381 #ifdef CONFIG_STRAM_PROC
382 static int stram_read_proc(char *page, char **start, off_t off,
383 int count, int *eof, void *data)
384 {
385 int len = get_stram_list(page);
386 return proc_calc_metrics(page, start, off, count, eof, len);
387 }
388 #endif
389
390 #ifdef CONFIG_BLOCK
391 static int partitions_open(struct inode *inode, struct file *file)
392 {
393 return seq_open(file, &partitions_op);
394 }
395 static const struct file_operations proc_partitions_operations = {
396 .open = partitions_open,
397 .read = seq_read,
398 .llseek = seq_lseek,
399 .release = seq_release,
400 };
401
402 static int diskstats_open(struct inode *inode, struct file *file)
403 {
404 return seq_open(file, &diskstats_op);
405 }
406 static const struct file_operations proc_diskstats_operations = {
407 .open = diskstats_open,
408 .read = seq_read,
409 .llseek = seq_lseek,
410 .release = seq_release,
411 };
412 #endif
413
414 #ifdef CONFIG_MODULES
415 extern const struct seq_operations modules_op;
416 static int modules_open(struct inode *inode, struct file *file)
417 {
418 return seq_open(file, &modules_op);
419 }
420 static const struct file_operations proc_modules_operations = {
421 .open = modules_open,
422 .read = seq_read,
423 .llseek = seq_lseek,
424 .release = seq_release,
425 };
426 #endif
427
428 #ifdef CONFIG_SLABINFO
429 static int slabinfo_open(struct inode *inode, struct file *file)
430 {
431 return seq_open(file, &slabinfo_op);
432 }
433 static const struct file_operations proc_slabinfo_operations = {
434 .open = slabinfo_open,
435 .read = seq_read,
436 .write = slabinfo_write,
437 .llseek = seq_lseek,
438 .release = seq_release,
439 };
440
441 #ifdef CONFIG_DEBUG_SLAB_LEAK
442 extern const struct seq_operations slabstats_op;
443 static int slabstats_open(struct inode *inode, struct file *file)
444 {
445 unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
446 int ret = -ENOMEM;
447 if (n) {
448 ret = seq_open(file, &slabstats_op);
449 if (!ret) {
450 struct seq_file *m = file->private_data;
451 *n = PAGE_SIZE / (2 * sizeof(unsigned long));
452 m->private = n;
453 n = NULL;
454 }
455 kfree(n);
456 }
457 return ret;
458 }
459
460 static const struct file_operations proc_slabstats_operations = {
461 .open = slabstats_open,
462 .read = seq_read,
463 .llseek = seq_lseek,
464 .release = seq_release_private,
465 };
466 #endif
467 #endif
468
469 #ifdef CONFIG_MMU
470 static int vmalloc_open(struct inode *inode, struct file *file)
471 {
472 unsigned int *ptr = NULL;
473 int ret;
474
475 if (NUMA_BUILD)
476 ptr = kmalloc(nr_node_ids * sizeof(unsigned int), GFP_KERNEL);
477 ret = seq_open(file, &vmalloc_op);
478 if (!ret) {
479 struct seq_file *m = file->private_data;
480 m->private = ptr;
481 } else
482 kfree(ptr);
483 return ret;
484 }
485
486 static const struct file_operations proc_vmalloc_operations = {
487 .open = vmalloc_open,
488 .read = seq_read,
489 .llseek = seq_lseek,
490 .release = seq_release_private,
491 };
492 #endif
493
494 #ifndef arch_irq_stat_cpu
495 #define arch_irq_stat_cpu(cpu) 0
496 #endif
497 #ifndef arch_irq_stat
498 #define arch_irq_stat() 0
499 #endif
500
501 static int show_stat(struct seq_file *p, void *v)
502 {
503 int i;
504 unsigned long jif;
505 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
506 cputime64_t guest;
507 u64 sum = 0;
508 struct timespec boottime;
509 unsigned int *per_irq_sum;
510
511 per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL);
512 if (!per_irq_sum)
513 return -ENOMEM;
514
515 user = nice = system = idle = iowait =
516 irq = softirq = steal = cputime64_zero;
517 guest = cputime64_zero;
518 getboottime(&boottime);
519 jif = boottime.tv_sec;
520
521 for_each_possible_cpu(i) {
522 int j;
523
524 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
525 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
526 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
527 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
528 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
529 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
530 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
531 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
532 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
533 for (j = 0; j < NR_IRQS; j++) {
534 unsigned int temp = kstat_cpu(i).irqs[j];
535 sum += temp;
536 per_irq_sum[j] += temp;
537 }
538 sum += arch_irq_stat_cpu(i);
539 }
540 sum += arch_irq_stat();
541
542 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
543 (unsigned long long)cputime64_to_clock_t(user),
544 (unsigned long long)cputime64_to_clock_t(nice),
545 (unsigned long long)cputime64_to_clock_t(system),
546 (unsigned long long)cputime64_to_clock_t(idle),
547 (unsigned long long)cputime64_to_clock_t(iowait),
548 (unsigned long long)cputime64_to_clock_t(irq),
549 (unsigned long long)cputime64_to_clock_t(softirq),
550 (unsigned long long)cputime64_to_clock_t(steal),
551 (unsigned long long)cputime64_to_clock_t(guest));
552 for_each_online_cpu(i) {
553
554 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
555 user = kstat_cpu(i).cpustat.user;
556 nice = kstat_cpu(i).cpustat.nice;
557 system = kstat_cpu(i).cpustat.system;
558 idle = kstat_cpu(i).cpustat.idle;
559 iowait = kstat_cpu(i).cpustat.iowait;
560 irq = kstat_cpu(i).cpustat.irq;
561 softirq = kstat_cpu(i).cpustat.softirq;
562 steal = kstat_cpu(i).cpustat.steal;
563 guest = kstat_cpu(i).cpustat.guest;
564 seq_printf(p,
565 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
566 i,
567 (unsigned long long)cputime64_to_clock_t(user),
568 (unsigned long long)cputime64_to_clock_t(nice),
569 (unsigned long long)cputime64_to_clock_t(system),
570 (unsigned long long)cputime64_to_clock_t(idle),
571 (unsigned long long)cputime64_to_clock_t(iowait),
572 (unsigned long long)cputime64_to_clock_t(irq),
573 (unsigned long long)cputime64_to_clock_t(softirq),
574 (unsigned long long)cputime64_to_clock_t(steal),
575 (unsigned long long)cputime64_to_clock_t(guest));
576 }
577 seq_printf(p, "intr %llu", (unsigned long long)sum);
578
579 for (i = 0; i < NR_IRQS; i++)
580 seq_printf(p, " %u", per_irq_sum[i]);
581
582 seq_printf(p,
583 "\nctxt %llu\n"
584 "btime %lu\n"
585 "processes %lu\n"
586 "procs_running %lu\n"
587 "procs_blocked %lu\n",
588 nr_context_switches(),
589 (unsigned long)jif,
590 total_forks,
591 nr_running(),
592 nr_iowait());
593
594 kfree(per_irq_sum);
595 return 0;
596 }
597
598 static int stat_open(struct inode *inode, struct file *file)
599 {
600 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
601 char *buf;
602 struct seq_file *m;
603 int res;
604
605 /* don't ask for more than the kmalloc() max size, currently 128 KB */
606 if (size > 128 * 1024)
607 size = 128 * 1024;
608 buf = kmalloc(size, GFP_KERNEL);
609 if (!buf)
610 return -ENOMEM;
611
612 res = single_open(file, show_stat, NULL);
613 if (!res) {
614 m = file->private_data;
615 m->buf = buf;
616 m->size = size;
617 } else
618 kfree(buf);
619 return res;
620 }
621 static const struct file_operations proc_stat_operations = {
622 .open = stat_open,
623 .read = seq_read,
624 .llseek = seq_lseek,
625 .release = single_release,
626 };
627
628 /*
629 * /proc/interrupts
630 */
631 static void *int_seq_start(struct seq_file *f, loff_t *pos)
632 {
633 return (*pos <= NR_IRQS) ? pos : NULL;
634 }
635
636 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
637 {
638 (*pos)++;
639 if (*pos > NR_IRQS)
640 return NULL;
641 return pos;
642 }
643
644 static void int_seq_stop(struct seq_file *f, void *v)
645 {
646 /* Nothing to do */
647 }
648
649
650 static const struct seq_operations int_seq_ops = {
651 .start = int_seq_start,
652 .next = int_seq_next,
653 .stop = int_seq_stop,
654 .show = show_interrupts
655 };
656
657 static int interrupts_open(struct inode *inode, struct file *filp)
658 {
659 return seq_open(filp, &int_seq_ops);
660 }
661
662 static const struct file_operations proc_interrupts_operations = {
663 .open = interrupts_open,
664 .read = seq_read,
665 .llseek = seq_lseek,
666 .release = seq_release,
667 };
668
669 static int filesystems_read_proc(char *page, char **start, off_t off,
670 int count, int *eof, void *data)
671 {
672 int len = get_filesystem_list(page);
673 return proc_calc_metrics(page, start, off, count, eof, len);
674 }
675
676 static int cmdline_read_proc(char *page, char **start, off_t off,
677 int count, int *eof, void *data)
678 {
679 int len;
680
681 len = sprintf(page, "%s\n", saved_command_line);
682 return proc_calc_metrics(page, start, off, count, eof, len);
683 }
684
685 #ifdef CONFIG_FILE_LOCKING
686 static int locks_open(struct inode *inode, struct file *filp)
687 {
688 return seq_open(filp, &locks_seq_operations);
689 }
690
691 static const struct file_operations proc_locks_operations = {
692 .open = locks_open,
693 .read = seq_read,
694 .llseek = seq_lseek,
695 .release = seq_release,
696 };
697 #endif /* CONFIG_FILE_LOCKING */
698
699 static int execdomains_read_proc(char *page, char **start, off_t off,
700 int count, int *eof, void *data)
701 {
702 int len = get_exec_domain_list(page);
703 return proc_calc_metrics(page, start, off, count, eof, len);
704 }
705
706 #ifdef CONFIG_PROC_PAGE_MONITOR
707 #define KPMSIZE sizeof(u64)
708 #define KPMMASK (KPMSIZE - 1)
709 /* /proc/kpagecount - an array exposing page counts
710 *
711 * Each entry is a u64 representing the corresponding
712 * physical page count.
713 */
714 static ssize_t kpagecount_read(struct file *file, char __user *buf,
715 size_t count, loff_t *ppos)
716 {
717 u64 __user *out = (u64 __user *)buf;
718 struct page *ppage;
719 unsigned long src = *ppos;
720 unsigned long pfn;
721 ssize_t ret = 0;
722 u64 pcount;
723
724 pfn = src / KPMSIZE;
725 count = min_t(size_t, count, (max_pfn * KPMSIZE) - src);
726 if (src & KPMMASK || count & KPMMASK)
727 return -EINVAL;
728
729 while (count > 0) {
730 ppage = NULL;
731 if (pfn_valid(pfn))
732 ppage = pfn_to_page(pfn);
733 pfn++;
734 if (!ppage)
735 pcount = 0;
736 else
737 pcount = page_mapcount(ppage);
738
739 if (put_user(pcount, out++)) {
740 ret = -EFAULT;
741 break;
742 }
743
744 count -= KPMSIZE;
745 }
746
747 *ppos += (char __user *)out - buf;
748 if (!ret)
749 ret = (char __user *)out - buf;
750 return ret;
751 }
752
753 static struct file_operations proc_kpagecount_operations = {
754 .llseek = mem_lseek,
755 .read = kpagecount_read,
756 };
757
758 /* /proc/kpageflags - an array exposing page flags
759 *
760 * Each entry is a u64 representing the corresponding
761 * physical page flags.
762 */
763
764 /* These macros are used to decouple internal flags from exported ones */
765
766 #define KPF_LOCKED 0
767 #define KPF_ERROR 1
768 #define KPF_REFERENCED 2
769 #define KPF_UPTODATE 3
770 #define KPF_DIRTY 4
771 #define KPF_LRU 5
772 #define KPF_ACTIVE 6
773 #define KPF_SLAB 7
774 #define KPF_WRITEBACK 8
775 #define KPF_RECLAIM 9
776 #define KPF_BUDDY 10
777
778 #define kpf_copy_bit(flags, srcpos, dstpos) (((flags >> srcpos) & 1) << dstpos)
779
780 static ssize_t kpageflags_read(struct file *file, char __user *buf,
781 size_t count, loff_t *ppos)
782 {
783 u64 __user *out = (u64 __user *)buf;
784 struct page *ppage;
785 unsigned long src = *ppos;
786 unsigned long pfn;
787 ssize_t ret = 0;
788 u64 kflags, uflags;
789
790 pfn = src / KPMSIZE;
791 count = min_t(unsigned long, count, (max_pfn * KPMSIZE) - src);
792 if (src & KPMMASK || count & KPMMASK)
793 return -EINVAL;
794
795 while (count > 0) {
796 ppage = NULL;
797 if (pfn_valid(pfn))
798 ppage = pfn_to_page(pfn);
799 pfn++;
800 if (!ppage)
801 kflags = 0;
802 else
803 kflags = ppage->flags;
804
805 uflags = kpf_copy_bit(KPF_LOCKED, PG_locked, kflags) |
806 kpf_copy_bit(kflags, KPF_ERROR, PG_error) |
807 kpf_copy_bit(kflags, KPF_REFERENCED, PG_referenced) |
808 kpf_copy_bit(kflags, KPF_UPTODATE, PG_uptodate) |
809 kpf_copy_bit(kflags, KPF_DIRTY, PG_dirty) |
810 kpf_copy_bit(kflags, KPF_LRU, PG_lru) |
811 kpf_copy_bit(kflags, KPF_ACTIVE, PG_active) |
812 kpf_copy_bit(kflags, KPF_SLAB, PG_slab) |
813 kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) |
814 kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) |
815 kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy);
816
817 if (put_user(uflags, out++)) {
818 ret = -EFAULT;
819 break;
820 }
821
822 count -= KPMSIZE;
823 }
824
825 *ppos += (char __user *)out - buf;
826 if (!ret)
827 ret = (char __user *)out - buf;
828 return ret;
829 }
830
831 static struct file_operations proc_kpageflags_operations = {
832 .llseek = mem_lseek,
833 .read = kpageflags_read,
834 };
835 #endif /* CONFIG_PROC_PAGE_MONITOR */
836
837 struct proc_dir_entry *proc_root_kcore;
838
839 void __init proc_misc_init(void)
840 {
841 static struct {
842 char *name;
843 int (*read_proc)(char*,char**,off_t,int,int*,void*);
844 } *p, simple_ones[] = {
845 {"loadavg", loadavg_read_proc},
846 {"uptime", uptime_read_proc},
847 {"meminfo", meminfo_read_proc},
848 {"version", version_read_proc},
849 #ifdef CONFIG_PROC_HARDWARE
850 {"hardware", hardware_read_proc},
851 #endif
852 #ifdef CONFIG_STRAM_PROC
853 {"stram", stram_read_proc},
854 #endif
855 {"filesystems", filesystems_read_proc},
856 {"cmdline", cmdline_read_proc},
857 {"execdomains", execdomains_read_proc},
858 {NULL,}
859 };
860 for (p = simple_ones; p->name; p++)
861 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
862
863 proc_symlink("mounts", NULL, "self/mounts");
864
865 /* And now for trickier ones */
866 #ifdef CONFIG_PRINTK
867 proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations);
868 #endif
869 #ifdef CONFIG_FILE_LOCKING
870 proc_create("locks", 0, NULL, &proc_locks_operations);
871 #endif
872 proc_create("devices", 0, NULL, &proc_devinfo_operations);
873 proc_create("cpuinfo", 0, NULL, &proc_cpuinfo_operations);
874 #ifdef CONFIG_BLOCK
875 proc_create("partitions", 0, NULL, &proc_partitions_operations);
876 #endif
877 proc_create("stat", 0, NULL, &proc_stat_operations);
878 proc_create("interrupts", 0, NULL, &proc_interrupts_operations);
879 #ifdef CONFIG_SLABINFO
880 proc_create("slabinfo",S_IWUSR|S_IRUGO,NULL,&proc_slabinfo_operations);
881 #ifdef CONFIG_DEBUG_SLAB_LEAK
882 proc_create("slab_allocators", 0, NULL, &proc_slabstats_operations);
883 #endif
884 #endif
885 #ifdef CONFIG_MMU
886 proc_create("vmallocinfo", S_IRUSR, NULL, &proc_vmalloc_operations);
887 #endif
888 proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
889 proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops);
890 proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations);
891 proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations);
892 #ifdef CONFIG_BLOCK
893 proc_create("diskstats", 0, NULL, &proc_diskstats_operations);
894 #endif
895 #ifdef CONFIG_MODULES
896 proc_create("modules", 0, NULL, &proc_modules_operations);
897 #endif
898 #ifdef CONFIG_SCHEDSTATS
899 proc_create("schedstat", 0, NULL, &proc_schedstat_operations);
900 #endif
901 #ifdef CONFIG_PROC_KCORE
902 proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations);
903 if (proc_root_kcore)
904 proc_root_kcore->size =
905 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
906 #endif
907 #ifdef CONFIG_PROC_PAGE_MONITOR
908 proc_create("kpagecount", S_IRUSR, NULL, &proc_kpagecount_operations);
909 proc_create("kpageflags", S_IRUSR, NULL, &proc_kpageflags_operations);
910 #endif
911 #ifdef CONFIG_PROC_VMCORE
912 proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
913 #endif
914 }
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