2 * linux/fs/proc/proc_misc.c
4 * linux/fs/proc/array.c
5 * Copyright (C) 1992 by Linus Torvalds
6 * based on ideas by Darren Senn
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.
14 * Fulton Green : Encapsulated position metric calculations.
15 * <kernel@FultonGreen.com>
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/tty.h>
24 #include <linux/string.h>
25 #include <linux/mman.h>
26 #include <linux/proc_fs.h>
27 #include <linux/ioport.h>
28 #include <linux/config.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>
47 #include <asm/uaccess.h>
48 #include <asm/pgtable.h>
51 #include <asm/div64.h>
54 #include <linux/vs_cvirt.h>
56 #define LOAD_INT(x) ((x) >> FSHIFT)
57 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
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.
64 extern int get_hardware_list(char *);
65 extern int get_stram_list(char *);
66 extern int get_chrdev_list(char *);
67 extern int get_filesystem_list(char *);
68 extern int get_exec_domain_list(char *);
69 extern int get_dma_list(char *);
70 extern int get_locks_status (char *, char **, off_t, int);
72 static int proc_calc_metrics(char *page, char **start, off_t off,
73 int count, int *eof, int len)
75 if (len <= off+count) *eof = 1;
78 if (len>count) len = count;
83 static int loadavg_read_proc(char *page, char **start, off_t off,
84 int count, int *eof, void *data)
86 unsigned int running, threads;
90 if (vx_flags(VXF_VIRT_LOAD, 0)) {
91 struct vx_info *vxi = current->vx_info;
93 a = vxi->cvirt.load[0] + (FIXED_1/200);
94 b = vxi->cvirt.load[1] + (FIXED_1/200);
95 c = vxi->cvirt.load[2] + (FIXED_1/200);
97 running = atomic_read(&vxi->cvirt.nr_running);
98 threads = atomic_read(&vxi->cvirt.nr_threads);
100 a = avenrun[0] + (FIXED_1/200);
101 b = avenrun[1] + (FIXED_1/200);
102 c = avenrun[2] + (FIXED_1/200);
104 running = nr_running();
105 threads = nr_threads;
107 len = sprintf(page,"%d.%02d %d.%02d %d.%02d %d/%d %d\n",
108 LOAD_INT(a), LOAD_FRAC(a),
109 LOAD_INT(b), LOAD_FRAC(b),
110 LOAD_INT(c), LOAD_FRAC(c),
111 running, threads, last_pid);
112 return proc_calc_metrics(page, start, off, count, eof, len);
115 static int uptime_read_proc(char *page, char **start, off_t off,
116 int count, int *eof, void *data)
118 struct timespec uptime;
119 struct timespec idle;
121 cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
123 do_posix_clock_monotonic_gettime(&uptime);
124 cputime_to_timespec(idletime, &idle);
125 if (vx_flags(VXF_VIRT_UPTIME, 0))
126 vx_vsi_uptime(&uptime, &idle);
128 len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
129 (unsigned long) uptime.tv_sec,
130 (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
131 (unsigned long) idle.tv_sec,
132 (idle.tv_nsec / (NSEC_PER_SEC / 100)));
134 return proc_calc_metrics(page, start, off, count, eof, len);
137 static int meminfo_read_proc(char *page, char **start, off_t off,
138 int count, int *eof, void *data)
142 struct page_state ps;
143 unsigned long inactive;
144 unsigned long active;
146 unsigned long committed;
147 unsigned long allowed;
148 struct vmalloc_info vmi;
151 get_zone_counts(&active, &inactive, &free);
154 * display in kilobytes.
156 #define K(x) ((x) << (PAGE_SHIFT - 10))
159 committed = atomic_read(&vm_committed_space);
160 allowed = ((totalram_pages - hugetlb_total_pages())
161 * sysctl_overcommit_ratio / 100) + total_swap_pages;
163 get_vmalloc_info(&vmi);
166 * Tagged format, for easy grepping and expansion.
169 "MemTotal: %8lu kB\n"
173 "SwapCached: %8lu kB\n"
175 "Inactive: %8lu kB\n"
176 "HighTotal: %8lu kB\n"
177 "HighFree: %8lu kB\n"
178 "LowTotal: %8lu kB\n"
180 "SwapTotal: %8lu kB\n"
181 "SwapFree: %8lu kB\n"
183 "Writeback: %8lu kB\n"
186 "CommitLimit: %8lu kB\n"
187 "Committed_AS: %8lu kB\n"
188 "PageTables: %8lu kB\n"
189 "VmallocTotal: %8lu kB\n"
190 "VmallocUsed: %8lu kB\n"
191 "VmallocChunk: %8lu kB\n",
195 K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
196 K(total_swapcache_pages),
201 K(i.totalram-i.totalhigh),
202 K(i.freeram-i.freehigh),
211 K(ps.nr_page_table_pages),
214 vmi.largest_chunk >> 10
217 len += hugetlb_report_meminfo(page + len);
219 return proc_calc_metrics(page, start, off, count, eof, len);
223 extern struct seq_operations fragmentation_op;
224 static int fragmentation_open(struct inode *inode, struct file *file)
227 return seq_open(file, &fragmentation_op);
230 static struct file_operations fragmentation_file_operations = {
231 .open = fragmentation_open,
234 .release = seq_release,
237 static int version_read_proc(char *page, char **start, off_t off,
238 int count, int *eof, void *data)
242 len = sprintf(page, vx_linux_banner,
244 vx_new_uts(version));
245 return proc_calc_metrics(page, start, off, count, eof, len);
248 extern struct seq_operations cpuinfo_op;
249 static int cpuinfo_open(struct inode *inode, struct file *file)
251 return seq_open(file, &cpuinfo_op);
253 static struct file_operations proc_cpuinfo_operations = {
254 .open = cpuinfo_open,
257 .release = seq_release,
260 extern struct seq_operations vmstat_op;
261 static int vmstat_open(struct inode *inode, struct file *file)
263 return seq_open(file, &vmstat_op);
265 static struct file_operations proc_vmstat_file_operations = {
269 .release = seq_release,
272 #ifdef CONFIG_PROC_HARDWARE
273 static int hardware_read_proc(char *page, char **start, off_t off,
274 int count, int *eof, void *data)
276 int len = get_hardware_list(page);
277 return proc_calc_metrics(page, start, off, count, eof, len);
281 #ifdef CONFIG_STRAM_PROC
282 static int stram_read_proc(char *page, char **start, off_t off,
283 int count, int *eof, void *data)
285 int len = get_stram_list(page);
286 return proc_calc_metrics(page, start, off, count, eof, len);
290 extern struct seq_operations partitions_op;
291 static int partitions_open(struct inode *inode, struct file *file)
293 return seq_open(file, &partitions_op);
295 static struct file_operations proc_partitions_operations = {
296 .open = partitions_open,
299 .release = seq_release,
302 extern struct seq_operations diskstats_op;
303 static int diskstats_open(struct inode *inode, struct file *file)
305 return seq_open(file, &diskstats_op);
307 static struct file_operations proc_diskstats_operations = {
308 .open = diskstats_open,
311 .release = seq_release,
314 #ifdef CONFIG_MODULES
315 extern struct seq_operations modules_op;
316 static int modules_open(struct inode *inode, struct file *file)
318 return seq_open(file, &modules_op);
320 static struct file_operations proc_modules_operations = {
321 .open = modules_open,
324 .release = seq_release,
328 extern struct seq_operations slabinfo_op;
329 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
330 static int slabinfo_open(struct inode *inode, struct file *file)
332 return seq_open(file, &slabinfo_op);
334 static struct file_operations proc_slabinfo_operations = {
335 .open = slabinfo_open,
337 .write = slabinfo_write,
339 .release = seq_release,
342 static int show_stat(struct seq_file *p, void *v)
346 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
349 user = nice = system = idle = iowait =
350 irq = softirq = steal = cputime64_zero;
351 jif = - wall_to_monotonic.tv_sec;
352 if (wall_to_monotonic.tv_nsec)
358 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
359 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
360 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
361 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
362 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
363 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
364 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
365 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
366 for (j = 0 ; j < NR_IRQS ; j++)
367 sum += kstat_cpu(i).irqs[j];
370 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu\n",
371 (unsigned long long)cputime64_to_clock_t(user),
372 (unsigned long long)cputime64_to_clock_t(nice),
373 (unsigned long long)cputime64_to_clock_t(system),
374 (unsigned long long)cputime64_to_clock_t(idle),
375 (unsigned long long)cputime64_to_clock_t(iowait),
376 (unsigned long long)cputime64_to_clock_t(irq),
377 (unsigned long long)cputime64_to_clock_t(softirq),
378 (unsigned long long)cputime64_to_clock_t(steal));
379 for_each_online_cpu(i) {
381 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
382 user = kstat_cpu(i).cpustat.user;
383 nice = kstat_cpu(i).cpustat.nice;
384 system = kstat_cpu(i).cpustat.system;
385 idle = kstat_cpu(i).cpustat.idle;
386 iowait = kstat_cpu(i).cpustat.iowait;
387 irq = kstat_cpu(i).cpustat.irq;
388 softirq = kstat_cpu(i).cpustat.softirq;
389 steal = kstat_cpu(i).cpustat.steal;
390 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
392 (unsigned long long)cputime64_to_clock_t(user),
393 (unsigned long long)cputime64_to_clock_t(nice),
394 (unsigned long long)cputime64_to_clock_t(system),
395 (unsigned long long)cputime64_to_clock_t(idle),
396 (unsigned long long)cputime64_to_clock_t(iowait),
397 (unsigned long long)cputime64_to_clock_t(irq),
398 (unsigned long long)cputime64_to_clock_t(softirq),
399 (unsigned long long)cputime64_to_clock_t(steal));
401 seq_printf(p, "intr %llu", (unsigned long long)sum);
403 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
404 for (i = 0; i < NR_IRQS; i++)
405 seq_printf(p, " %u", kstat_irqs(i));
412 "procs_running %lu\n"
413 "procs_blocked %lu\n",
414 nr_context_switches(),
423 static int stat_open(struct inode *inode, struct file *file)
425 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
430 /* don't ask for more than the kmalloc() max size, currently 128 KB */
431 if (size > 128 * 1024)
433 buf = kmalloc(size, GFP_KERNEL);
437 res = single_open(file, show_stat, NULL);
439 m = file->private_data;
446 static struct file_operations proc_stat_operations = {
450 .release = single_release,
453 static int devices_read_proc(char *page, char **start, off_t off,
454 int count, int *eof, void *data)
456 int len = get_chrdev_list(page);
457 len += get_blkdev_list(page+len);
458 return proc_calc_metrics(page, start, off, count, eof, len);
464 static void *int_seq_start(struct seq_file *f, loff_t *pos)
466 return (*pos <= NR_IRQS) ? pos : NULL;
469 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
477 static void int_seq_stop(struct seq_file *f, void *v)
483 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
484 static struct seq_operations int_seq_ops = {
485 .start = int_seq_start,
486 .next = int_seq_next,
487 .stop = int_seq_stop,
488 .show = show_interrupts
491 static int interrupts_open(struct inode *inode, struct file *filp)
493 return seq_open(filp, &int_seq_ops);
496 static struct file_operations proc_interrupts_operations = {
497 .open = interrupts_open,
500 .release = seq_release,
503 static int filesystems_read_proc(char *page, char **start, off_t off,
504 int count, int *eof, void *data)
506 int len = get_filesystem_list(page);
507 return proc_calc_metrics(page, start, off, count, eof, len);
510 static int cmdline_read_proc(char *page, char **start, off_t off,
511 int count, int *eof, void *data)
515 len = sprintf(page, "%s\n", saved_command_line);
516 return proc_calc_metrics(page, start, off, count, eof, len);
519 static int locks_read_proc(char *page, char **start, off_t off,
520 int count, int *eof, void *data)
522 int len = get_locks_status(page, start, off, count);
529 static int execdomains_read_proc(char *page, char **start, off_t off,
530 int count, int *eof, void *data)
532 int len = get_exec_domain_list(page);
533 return proc_calc_metrics(page, start, off, count, eof, len);
536 #ifdef CONFIG_MAGIC_SYSRQ
538 * writing 'C' to /proc/sysrq-trigger is like sysrq-C
540 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
541 size_t count, loff_t *ppos)
546 if (get_user(c, buf))
548 __handle_sysrq(c, NULL, NULL);
553 static struct file_operations proc_sysrq_trigger_operations = {
554 .write = write_sysrq_trigger,
558 struct proc_dir_entry *proc_root_kcore;
560 void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
562 struct proc_dir_entry *entry;
563 entry = create_proc_entry(name, mode, NULL);
565 entry->proc_fops = f;
568 void __init proc_misc_init(void)
570 struct proc_dir_entry *entry;
573 int (*read_proc)(char*,char**,off_t,int,int*,void*);
574 } *p, simple_ones[] = {
575 {"loadavg", loadavg_read_proc},
576 {"uptime", uptime_read_proc},
577 {"meminfo", meminfo_read_proc},
578 {"version", version_read_proc},
579 #ifdef CONFIG_PROC_HARDWARE
580 {"hardware", hardware_read_proc},
582 #ifdef CONFIG_STRAM_PROC
583 {"stram", stram_read_proc},
585 {"devices", devices_read_proc},
586 {"filesystems", filesystems_read_proc},
587 {"cmdline", cmdline_read_proc},
588 {"locks", locks_read_proc},
589 {"execdomains", execdomains_read_proc},
592 for (p = simple_ones; p->name; p++)
593 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
595 proc_symlink("mounts", NULL, "self/mounts");
597 /* And now for trickier ones */
598 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
600 entry->proc_fops = &proc_kmsg_operations;
601 create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
602 create_seq_entry("partitions", 0, &proc_partitions_operations);
603 create_seq_entry("stat", 0, &proc_stat_operations);
604 create_seq_entry("interrupts", 0, &proc_interrupts_operations);
605 create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
606 create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
607 create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
608 create_seq_entry("diskstats", 0, &proc_diskstats_operations);
609 #ifdef CONFIG_MODULES
610 create_seq_entry("modules", 0, &proc_modules_operations);
612 #ifdef CONFIG_SCHEDSTATS
613 create_seq_entry("schedstat", 0, &proc_schedstat_operations);
615 #ifdef CONFIG_PROC_KCORE
616 proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
617 if (proc_root_kcore) {
618 proc_root_kcore->proc_fops = &proc_kcore_operations;
619 proc_root_kcore->size =
620 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
623 #ifdef CONFIG_MAGIC_SYSRQ
624 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
626 entry->proc_fops = &proc_sysrq_trigger_operations;
630 extern struct file_operations ppc_htab_operations;
631 entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
633 entry->proc_fops = &ppc_htab_operations;