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-rw-r--r--fs/proc/proc_misc.c933
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diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
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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/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/irq.h>
34#include <linux/interrupt.h>
35#include <linux/swap.h>
36#include <linux/slab.h>
37#include <linux/genhd.h>
38#include <linux/smp.h>
39#include <linux/signal.h>
40#include <linux/module.h>
41#include <linux/init.h>
42#include <linux/seq_file.h>
43#include <linux/times.h>
44#include <linux/profile.h>
45#include <linux/utsname.h>
46#include <linux/blkdev.h>
47#include <linux/hugetlb.h>
48#include <linux/jiffies.h>
49#include <linux/vmalloc.h>
50#include <linux/crash_dump.h>
51#include <linux/pid_namespace.h>
52#include <linux/bootmem.h>
53#include <asm/uaccess.h>
54#include <asm/pgtable.h>
55#include <asm/io.h>
56#include <asm/tlb.h>
57#include <asm/div64.h>
58#include "internal.h"
59
60#define LOAD_INT(x) ((x) >> FSHIFT)
61#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
62/*
63 * Warning: stuff below (imported functions) assumes that its output will fit
64 * into one page. For some of those functions it may be wrong. Moreover, we
65 * have a way to deal with that gracefully. Right now I used straightforward
66 * wrappers, but this needs further analysis wrt potential overflows.
67 */
68extern int get_hardware_list(char *);
69extern int get_stram_list(char *);
70extern int get_exec_domain_list(char *);
71
72static 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
83static 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 unsigned long seq;
89
90 do {
91 seq = read_seqbegin(&xtime_lock);
92 a = avenrun[0] + (FIXED_1/200);
93 b = avenrun[1] + (FIXED_1/200);
94 c = avenrun[2] + (FIXED_1/200);
95 } while (read_seqretry(&xtime_lock, seq));
96
97 len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
98 LOAD_INT(a), LOAD_FRAC(a),
99 LOAD_INT(b), LOAD_FRAC(b),
100 LOAD_INT(c), LOAD_FRAC(c),
101 nr_running(), nr_threads,
102 task_active_pid_ns(current)->last_pid);
103 return proc_calc_metrics(page, start, off, count, eof, len);
104}
105
106static int uptime_read_proc(char *page, char **start, off_t off,
107 int count, int *eof, void *data)
108{
109 struct timespec uptime;
110 struct timespec idle;
111 int len;
112 cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
113
114 do_posix_clock_monotonic_gettime(&uptime);
115 monotonic_to_bootbased(&uptime);
116 cputime_to_timespec(idletime, &idle);
117 len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
118 (unsigned long) uptime.tv_sec,
119 (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
120 (unsigned long) idle.tv_sec,
121 (idle.tv_nsec / (NSEC_PER_SEC / 100)));
122
123 return proc_calc_metrics(page, start, off, count, eof, len);
124}
125
126int __attribute__((weak)) arch_report_meminfo(char *page)
127{
128 return 0;
129}
130
131static int meminfo_read_proc(char *page, char **start, off_t off,
132 int count, int *eof, void *data)
133{
134 struct sysinfo i;
135 int len;
136 unsigned long committed;
137 unsigned long allowed;
138 struct vmalloc_info vmi;
139 long cached;
140 unsigned long pages[NR_LRU_LISTS];
141 int lru;
142
143/*
144 * display in kilobytes.
145 */
146#define K(x) ((x) << (PAGE_SHIFT - 10))
147 si_meminfo(&i);
148 si_swapinfo(&i);
149 committed = atomic_long_read(&vm_committed_space);
150 allowed = ((totalram_pages - hugetlb_total_pages())
151 * sysctl_overcommit_ratio / 100) + total_swap_pages;
152
153 cached = global_page_state(NR_FILE_PAGES) -
154 total_swapcache_pages - i.bufferram;
155 if (cached < 0)
156 cached = 0;
157
158 get_vmalloc_info(&vmi);
159
160 for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
161 pages[lru] = global_page_state(NR_LRU_BASE + lru);
162
163 /*
164 * Tagged format, for easy grepping and expansion.
165 */
166 len = sprintf(page,
167 "MemTotal: %8lu kB\n"
168 "MemFree: %8lu kB\n"
169 "Buffers: %8lu kB\n"
170 "Cached: %8lu kB\n"
171 "SwapCached: %8lu kB\n"
172 "Active: %8lu kB\n"
173 "Inactive: %8lu kB\n"
174 "Active(anon): %8lu kB\n"
175 "Inactive(anon): %8lu kB\n"
176 "Active(file): %8lu kB\n"
177 "Inactive(file): %8lu kB\n"
178#ifdef CONFIG_UNEVICTABLE_LRU
179 "Unevictable: %8lu kB\n"
180 "Mlocked: %8lu kB\n"
181#endif
182#ifdef CONFIG_HIGHMEM
183 "HighTotal: %8lu kB\n"
184 "HighFree: %8lu kB\n"
185 "LowTotal: %8lu kB\n"
186 "LowFree: %8lu kB\n"
187#endif
188 "SwapTotal: %8lu kB\n"
189 "SwapFree: %8lu kB\n"
190 "Dirty: %8lu kB\n"
191 "Writeback: %8lu kB\n"
192 "AnonPages: %8lu kB\n"
193 "Mapped: %8lu kB\n"
194 "Slab: %8lu kB\n"
195 "SReclaimable: %8lu kB\n"
196 "SUnreclaim: %8lu kB\n"
197 "PageTables: %8lu kB\n"
198#ifdef CONFIG_QUICKLIST
199 "Quicklists: %8lu kB\n"
200#endif
201 "NFS_Unstable: %8lu kB\n"
202 "Bounce: %8lu kB\n"
203 "WritebackTmp: %8lu kB\n"
204 "CommitLimit: %8lu kB\n"
205 "Committed_AS: %8lu kB\n"
206 "VmallocTotal: %8lu kB\n"
207 "VmallocUsed: %8lu kB\n"
208 "VmallocChunk: %8lu kB\n",
209 K(i.totalram),
210 K(i.freeram),
211 K(i.bufferram),
212 K(cached),
213 K(total_swapcache_pages),
214 K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
215 K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
216 K(pages[LRU_ACTIVE_ANON]),
217 K(pages[LRU_INACTIVE_ANON]),
218 K(pages[LRU_ACTIVE_FILE]),
219 K(pages[LRU_INACTIVE_FILE]),
220#ifdef CONFIG_UNEVICTABLE_LRU
221 K(pages[LRU_UNEVICTABLE]),
222 K(global_page_state(NR_MLOCK)),
223#endif
224#ifdef CONFIG_HIGHMEM
225 K(i.totalhigh),
226 K(i.freehigh),
227 K(i.totalram-i.totalhigh),
228 K(i.freeram-i.freehigh),
229#endif
230 K(i.totalswap),
231 K(i.freeswap),
232 K(global_page_state(NR_FILE_DIRTY)),
233 K(global_page_state(NR_WRITEBACK)),
234 K(global_page_state(NR_ANON_PAGES)),
235 K(global_page_state(NR_FILE_MAPPED)),
236 K(global_page_state(NR_SLAB_RECLAIMABLE) +
237 global_page_state(NR_SLAB_UNRECLAIMABLE)),
238 K(global_page_state(NR_SLAB_RECLAIMABLE)),
239 K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
240 K(global_page_state(NR_PAGETABLE)),
241#ifdef CONFIG_QUICKLIST
242 K(quicklist_total_size()),
243#endif
244 K(global_page_state(NR_UNSTABLE_NFS)),
245 K(global_page_state(NR_BOUNCE)),
246 K(global_page_state(NR_WRITEBACK_TEMP)),
247 K(allowed),
248 K(committed),
249 (unsigned long)VMALLOC_TOTAL >> 10,
250 vmi.used >> 10,
251 vmi.largest_chunk >> 10
252 );
253
254 len += hugetlb_report_meminfo(page + len);
255
256 len += arch_report_meminfo(page + len);
257
258 return proc_calc_metrics(page, start, off, count, eof, len);
259#undef K
260}
261
262static int fragmentation_open(struct inode *inode, struct file *file)
263{
264 (void)inode;
265 return seq_open(file, &fragmentation_op);
266}
267
268static const struct file_operations fragmentation_file_operations = {
269 .open = fragmentation_open,
270 .read = seq_read,
271 .llseek = seq_lseek,
272 .release = seq_release,
273};
274
275static int pagetypeinfo_open(struct inode *inode, struct file *file)
276{
277 return seq_open(file, &pagetypeinfo_op);
278}
279
280static const struct file_operations pagetypeinfo_file_ops = {
281 .open = pagetypeinfo_open,
282 .read = seq_read,
283 .llseek = seq_lseek,
284 .release = seq_release,
285};
286
287static int zoneinfo_open(struct inode *inode, struct file *file)
288{
289 return seq_open(file, &zoneinfo_op);
290}
291
292static const struct file_operations proc_zoneinfo_file_operations = {
293 .open = zoneinfo_open,
294 .read = seq_read,
295 .llseek = seq_lseek,
296 .release = seq_release,
297};
298
299static int version_read_proc(char *page, char **start, off_t off,
300 int count, int *eof, void *data)
301{
302 int len;
303
304 len = snprintf(page, PAGE_SIZE, linux_proc_banner,
305 utsname()->sysname,
306 utsname()->release,
307 utsname()->version);
308 return proc_calc_metrics(page, start, off, count, eof, len);
309}
310
311extern const struct seq_operations cpuinfo_op;
312static int cpuinfo_open(struct inode *inode, struct file *file)
313{
314 return seq_open(file, &cpuinfo_op);
315}
316
317static const struct file_operations proc_cpuinfo_operations = {
318 .open = cpuinfo_open,
319 .read = seq_read,
320 .llseek = seq_lseek,
321 .release = seq_release,
322};
323
324static int devinfo_show(struct seq_file *f, void *v)
325{
326 int i = *(loff_t *) v;
327
328 if (i < CHRDEV_MAJOR_HASH_SIZE) {
329 if (i == 0)
330 seq_printf(f, "Character devices:\n");
331 chrdev_show(f, i);
332 }
333#ifdef CONFIG_BLOCK
334 else {
335 i -= CHRDEV_MAJOR_HASH_SIZE;
336 if (i == 0)
337 seq_printf(f, "\nBlock devices:\n");
338 blkdev_show(f, i);
339 }
340#endif
341 return 0;
342}
343
344static void *devinfo_start(struct seq_file *f, loff_t *pos)
345{
346 if (*pos < (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
347 return pos;
348 return NULL;
349}
350
351static void *devinfo_next(struct seq_file *f, void *v, loff_t *pos)
352{
353 (*pos)++;
354 if (*pos >= (BLKDEV_MAJOR_HASH_SIZE + CHRDEV_MAJOR_HASH_SIZE))
355 return NULL;
356 return pos;
357}
358
359static void devinfo_stop(struct seq_file *f, void *v)
360{
361 /* Nothing to do */
362}
363
364static const struct seq_operations devinfo_ops = {
365 .start = devinfo_start,
366 .next = devinfo_next,
367 .stop = devinfo_stop,
368 .show = devinfo_show
369};
370
371static int devinfo_open(struct inode *inode, struct file *filp)
372{
373 return seq_open(filp, &devinfo_ops);
374}
375
376static const struct file_operations proc_devinfo_operations = {
377 .open = devinfo_open,
378 .read = seq_read,
379 .llseek = seq_lseek,
380 .release = seq_release,
381};
382
383static int vmstat_open(struct inode *inode, struct file *file)
384{
385 return seq_open(file, &vmstat_op);
386}
387static const struct file_operations proc_vmstat_file_operations = {
388 .open = vmstat_open,
389 .read = seq_read,
390 .llseek = seq_lseek,
391 .release = seq_release,
392};
393
394#ifdef CONFIG_PROC_HARDWARE
395static int hardware_read_proc(char *page, char **start, off_t off,
396 int count, int *eof, void *data)
397{
398 int len = get_hardware_list(page);
399 return proc_calc_metrics(page, start, off, count, eof, len);
400}
401#endif
402
403#ifdef CONFIG_STRAM_PROC
404static int stram_read_proc(char *page, char **start, off_t off,
405 int count, int *eof, void *data)
406{
407 int len = get_stram_list(page);
408 return proc_calc_metrics(page, start, off, count, eof, len);
409}
410#endif
411
412#ifdef CONFIG_BLOCK
413static int partitions_open(struct inode *inode, struct file *file)
414{
415 return seq_open(file, &partitions_op);
416}
417static const struct file_operations proc_partitions_operations = {
418 .open = partitions_open,
419 .read = seq_read,
420 .llseek = seq_lseek,
421 .release = seq_release,
422};
423
424static int diskstats_open(struct inode *inode, struct file *file)
425{
426 return seq_open(file, &diskstats_op);
427}
428static const struct file_operations proc_diskstats_operations = {
429 .open = diskstats_open,
430 .read = seq_read,
431 .llseek = seq_lseek,
432 .release = seq_release,
433};
434#endif
435
436#ifdef CONFIG_MODULES
437extern const struct seq_operations modules_op;
438static int modules_open(struct inode *inode, struct file *file)
439{
440 return seq_open(file, &modules_op);
441}
442static const struct file_operations proc_modules_operations = {
443 .open = modules_open,
444 .read = seq_read,
445 .llseek = seq_lseek,
446 .release = seq_release,
447};
448#endif
449
450#ifdef CONFIG_SLABINFO
451static int slabinfo_open(struct inode *inode, struct file *file)
452{
453 return seq_open(file, &slabinfo_op);
454}
455static const struct file_operations proc_slabinfo_operations = {
456 .open = slabinfo_open,
457 .read = seq_read,
458 .write = slabinfo_write,
459 .llseek = seq_lseek,
460 .release = seq_release,
461};
462
463#ifdef CONFIG_DEBUG_SLAB_LEAK
464extern const struct seq_operations slabstats_op;
465static int slabstats_open(struct inode *inode, struct file *file)
466{
467 unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
468 int ret = -ENOMEM;
469 if (n) {
470 ret = seq_open(file, &slabstats_op);
471 if (!ret) {
472 struct seq_file *m = file->private_data;
473 *n = PAGE_SIZE / (2 * sizeof(unsigned long));
474 m->private = n;
475 n = NULL;
476 }
477 kfree(n);
478 }
479 return ret;
480}
481
482static const struct file_operations proc_slabstats_operations = {
483 .open = slabstats_open,
484 .read = seq_read,
485 .llseek = seq_lseek,
486 .release = seq_release_private,
487};
488#endif
489#endif
490
491#ifdef CONFIG_MMU
492static int vmalloc_open(struct inode *inode, struct file *file)
493{
494 unsigned int *ptr = NULL;
495 int ret;
496
497 if (NUMA_BUILD)
498 ptr = kmalloc(nr_node_ids * sizeof(unsigned int), GFP_KERNEL);
499 ret = seq_open(file, &vmalloc_op);
500 if (!ret) {
501 struct seq_file *m = file->private_data;
502 m->private = ptr;
503 } else
504 kfree(ptr);
505 return ret;
506}
507
508static const struct file_operations proc_vmalloc_operations = {
509 .open = vmalloc_open,
510 .read = seq_read,
511 .llseek = seq_lseek,
512 .release = seq_release_private,
513};
514#endif
515
516#ifndef arch_irq_stat_cpu
517#define arch_irq_stat_cpu(cpu) 0
518#endif
519#ifndef arch_irq_stat
520#define arch_irq_stat() 0
521#endif
522
523static int show_stat(struct seq_file *p, void *v)
524{
525 int i, j;
526 unsigned long jif;
527 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
528 cputime64_t guest;
529 u64 sum = 0;
530 struct timespec boottime;
531 unsigned int per_irq_sum;
532
533 user = nice = system = idle = iowait =
534 irq = softirq = steal = cputime64_zero;
535 guest = cputime64_zero;
536 getboottime(&boottime);
537 jif = boottime.tv_sec;
538
539 for_each_possible_cpu(i) {
540 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
541 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
542 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
543 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
544 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
545 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
546 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
547 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
548 guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
549
550 for_each_irq_nr(j)
551 sum += kstat_irqs_cpu(j, i);
552
553 sum += arch_irq_stat_cpu(i);
554 }
555 sum += arch_irq_stat();
556
557 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
558 (unsigned long long)cputime64_to_clock_t(user),
559 (unsigned long long)cputime64_to_clock_t(nice),
560 (unsigned long long)cputime64_to_clock_t(system),
561 (unsigned long long)cputime64_to_clock_t(idle),
562 (unsigned long long)cputime64_to_clock_t(iowait),
563 (unsigned long long)cputime64_to_clock_t(irq),
564 (unsigned long long)cputime64_to_clock_t(softirq),
565 (unsigned long long)cputime64_to_clock_t(steal),
566 (unsigned long long)cputime64_to_clock_t(guest));
567 for_each_online_cpu(i) {
568
569 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
570 user = kstat_cpu(i).cpustat.user;
571 nice = kstat_cpu(i).cpustat.nice;
572 system = kstat_cpu(i).cpustat.system;
573 idle = kstat_cpu(i).cpustat.idle;
574 iowait = kstat_cpu(i).cpustat.iowait;
575 irq = kstat_cpu(i).cpustat.irq;
576 softirq = kstat_cpu(i).cpustat.softirq;
577 steal = kstat_cpu(i).cpustat.steal;
578 guest = kstat_cpu(i).cpustat.guest;
579 seq_printf(p,
580 "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
581 i,
582 (unsigned long long)cputime64_to_clock_t(user),
583 (unsigned long long)cputime64_to_clock_t(nice),
584 (unsigned long long)cputime64_to_clock_t(system),
585 (unsigned long long)cputime64_to_clock_t(idle),
586 (unsigned long long)cputime64_to_clock_t(iowait),
587 (unsigned long long)cputime64_to_clock_t(irq),
588 (unsigned long long)cputime64_to_clock_t(softirq),
589 (unsigned long long)cputime64_to_clock_t(steal),
590 (unsigned long long)cputime64_to_clock_t(guest));
591 }
592 seq_printf(p, "intr %llu", (unsigned long long)sum);
593
594 /* sum again ? it could be updated? */
595 for_each_irq_nr(j) {
596 per_irq_sum = 0;
597
598 for_each_possible_cpu(i)
599 per_irq_sum += kstat_irqs_cpu(j, i);
600
601 seq_printf(p, " %u", per_irq_sum);
602 }
603
604 seq_printf(p,
605 "\nctxt %llu\n"
606 "btime %lu\n"
607 "processes %lu\n"
608 "procs_running %lu\n"
609 "procs_blocked %lu\n",
610 nr_context_switches(),
611 (unsigned long)jif,
612 total_forks,
613 nr_running(),
614 nr_iowait());
615
616 return 0;
617}
618
619static int stat_open(struct inode *inode, struct file *file)
620{
621 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
622 char *buf;
623 struct seq_file *m;
624 int res;
625
626 /* don't ask for more than the kmalloc() max size, currently 128 KB */
627 if (size > 128 * 1024)
628 size = 128 * 1024;
629 buf = kmalloc(size, GFP_KERNEL);
630 if (!buf)
631 return -ENOMEM;
632
633 res = single_open(file, show_stat, NULL);
634 if (!res) {
635 m = file->private_data;
636 m->buf = buf;
637 m->size = size;
638 } else
639 kfree(buf);
640 return res;
641}
642static const struct file_operations proc_stat_operations = {
643 .open = stat_open,
644 .read = seq_read,
645 .llseek = seq_lseek,
646 .release = single_release,
647};
648
649/*
650 * /proc/interrupts
651 */
652static void *int_seq_start(struct seq_file *f, loff_t *pos)
653{
654 return (*pos <= nr_irqs) ? pos : NULL;
655}
656
657
658static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
659{
660 (*pos)++;
661 return (*pos <= nr_irqs) ? pos : NULL;
662}
663
664static void int_seq_stop(struct seq_file *f, void *v)
665{
666 /* Nothing to do */
667}
668
669static 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
676static int interrupts_open(struct inode *inode, struct file *filp)
677{
678 return seq_open(filp, &int_seq_ops);
679}
680
681static 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
688static 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
695static 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
705static int locks_open(struct inode *inode, struct file *filp)
706{
707 return seq_open(filp, &locks_seq_operations);
708}
709
710static 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
718static 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 */
733static 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
772static 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
799static 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
850static struct file_operations proc_kpageflags_operations = {
851 .llseek = mem_lseek,
852 .read = kpageflags_read,
853};
854#endif /* CONFIG_PROC_PAGE_MONITOR */
855
856struct proc_dir_entry *proc_root_kcore;
857
858void __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}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-11 08:05:23 -0500