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 <linux/crash_dump.h>
48 #include <linux/vs_base.h>
49 #include <linux/vs_cvirt.h>
51 #include <asm/uaccess.h>
52 #include <asm/pgtable.h>
55 #include <asm/div64.h>
58 #include <linux/vs_cvirt.h>
60 #define LOAD_INT(x) ((x) >> FSHIFT)
61 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
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.
68 extern int get_hardware_list(char *);
69 extern int get_stram_list(char *);
70 extern int get_chrdev_list(char *);
71 extern int get_filesystem_list(char *);
72 extern int get_exec_domain_list(char *);
73 extern int get_dma_list(char *);
74 extern int get_locks_status (char *, char **, off_t, int);
76 static int proc_calc_metrics(char *page, char **start, off_t off,
77 int count, int *eof, int len)
79 if (len <= off+count) *eof = 1;
82 if (len>count) len = count;
87 static int loadavg_read_proc(char *page, char **start, off_t off,
88 int count, int *eof, void *data)
90 unsigned int running, threads;
94 if (vx_flags(VXF_VIRT_LOAD, 0)) {
95 struct vx_info *vxi = current->vx_info;
97 a = vxi->cvirt.load[0] + (FIXED_1/200);
98 b = vxi->cvirt.load[1] + (FIXED_1/200);
99 c = vxi->cvirt.load[2] + (FIXED_1/200);
101 running = atomic_read(&vxi->cvirt.nr_running);
102 threads = atomic_read(&vxi->cvirt.nr_threads);
104 a = avenrun[0] + (FIXED_1/200);
105 b = avenrun[1] + (FIXED_1/200);
106 c = avenrun[2] + (FIXED_1/200);
108 running = nr_running();
109 threads = nr_threads;
111 len = sprintf(page,"%d.%02d %d.%02d %d.%02d %d/%d %d\n",
112 LOAD_INT(a), LOAD_FRAC(a),
113 LOAD_INT(b), LOAD_FRAC(b),
114 LOAD_INT(c), LOAD_FRAC(c),
115 running, threads, last_pid);
116 return proc_calc_metrics(page, start, off, count, eof, len);
119 static int uptime_read_proc(char *page, char **start, off_t off,
120 int count, int *eof, void *data)
122 struct timespec uptime;
123 struct timespec idle;
125 cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
127 do_posix_clock_monotonic_gettime(&uptime);
128 cputime_to_timespec(idletime, &idle);
129 if (vx_flags(VXF_VIRT_UPTIME, 0))
130 vx_vsi_uptime(&uptime, &idle);
132 len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
133 (unsigned long) uptime.tv_sec,
134 (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
135 (unsigned long) idle.tv_sec,
136 (idle.tv_nsec / (NSEC_PER_SEC / 100)));
138 return proc_calc_metrics(page, start, off, count, eof, len);
141 static int meminfo_read_proc(char *page, char **start, off_t off,
142 int count, int *eof, void *data)
146 struct page_state ps;
147 unsigned long inactive;
148 unsigned long active;
150 unsigned long committed;
151 unsigned long allowed;
152 struct vmalloc_info vmi;
156 get_zone_counts(&active, &inactive, &free);
159 * display in kilobytes.
161 #define K(x) ((x) << (PAGE_SHIFT - 10))
164 committed = atomic_read(&vm_committed_space);
165 allowed = ((totalram_pages - hugetlb_total_pages())
166 * sysctl_overcommit_ratio / 100) + total_swap_pages;
168 cached = get_page_cache_size() - total_swapcache_pages - i.bufferram;
172 get_vmalloc_info(&vmi);
175 * Tagged format, for easy grepping and expansion.
178 "MemTotal: %8lu kB\n"
182 "SwapCached: %8lu kB\n"
184 "Inactive: %8lu kB\n"
185 "HighTotal: %8lu kB\n"
186 "HighFree: %8lu kB\n"
187 "LowTotal: %8lu kB\n"
189 "SwapTotal: %8lu kB\n"
190 "SwapFree: %8lu kB\n"
192 "Writeback: %8lu kB\n"
195 "CommitLimit: %8lu kB\n"
196 "Committed_AS: %8lu kB\n"
197 "PageTables: %8lu kB\n"
198 "VmallocTotal: %8lu kB\n"
199 "VmallocUsed: %8lu kB\n"
200 "VmallocChunk: %8lu kB\n",
205 K(total_swapcache_pages),
210 K(i.totalram-i.totalhigh),
211 K(i.freeram-i.freehigh),
220 K(ps.nr_page_table_pages),
221 (unsigned long)VMALLOC_TOTAL >> 10,
223 vmi.largest_chunk >> 10
226 len += hugetlb_report_meminfo(page + len);
228 return proc_calc_metrics(page, start, off, count, eof, len);
232 extern struct seq_operations fragmentation_op;
233 static int fragmentation_open(struct inode *inode, struct file *file)
236 return seq_open(file, &fragmentation_op);
239 static struct file_operations fragmentation_file_operations = {
240 .open = fragmentation_open,
243 .release = seq_release,
246 static int version_read_proc(char *page, char **start, off_t off,
247 int count, int *eof, void *data)
251 len = sprintf(page, vx_linux_banner,
253 vx_new_uts(version));
254 return proc_calc_metrics(page, start, off, count, eof, len);
257 extern struct seq_operations cpuinfo_op;
258 static int cpuinfo_open(struct inode *inode, struct file *file)
260 return seq_open(file, &cpuinfo_op);
262 static struct file_operations proc_cpuinfo_operations = {
263 .open = cpuinfo_open,
266 .release = seq_release,
269 extern struct seq_operations vmstat_op;
270 static int vmstat_open(struct inode *inode, struct file *file)
272 return seq_open(file, &vmstat_op);
274 static struct file_operations proc_vmstat_file_operations = {
278 .release = seq_release,
281 #ifdef CONFIG_PROC_HARDWARE
282 static int hardware_read_proc(char *page, char **start, off_t off,
283 int count, int *eof, void *data)
285 int len = get_hardware_list(page);
286 return proc_calc_metrics(page, start, off, count, eof, len);
290 #ifdef CONFIG_STRAM_PROC
291 static int stram_read_proc(char *page, char **start, off_t off,
292 int count, int *eof, void *data)
294 int len = get_stram_list(page);
295 return proc_calc_metrics(page, start, off, count, eof, len);
299 extern struct seq_operations partitions_op;
300 static int partitions_open(struct inode *inode, struct file *file)
302 return seq_open(file, &partitions_op);
304 static struct file_operations proc_partitions_operations = {
305 .open = partitions_open,
308 .release = seq_release,
311 extern struct seq_operations diskstats_op;
312 static int diskstats_open(struct inode *inode, struct file *file)
314 return seq_open(file, &diskstats_op);
316 static struct file_operations proc_diskstats_operations = {
317 .open = diskstats_open,
320 .release = seq_release,
323 #ifdef CONFIG_MODULES
324 extern struct seq_operations modules_op;
325 static int modules_open(struct inode *inode, struct file *file)
327 return seq_open(file, &modules_op);
329 static struct file_operations proc_modules_operations = {
330 .open = modules_open,
333 .release = seq_release,
337 extern struct seq_operations slabinfo_op;
338 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
339 static int slabinfo_open(struct inode *inode, struct file *file)
341 return seq_open(file, &slabinfo_op);
343 static struct file_operations proc_slabinfo_operations = {
344 .open = slabinfo_open,
346 .write = slabinfo_write,
348 .release = seq_release,
351 static int show_stat(struct seq_file *p, void *v)
355 cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
358 user = nice = system = idle = iowait =
359 irq = softirq = steal = cputime64_zero;
360 jif = - wall_to_monotonic.tv_sec;
361 if (wall_to_monotonic.tv_nsec)
367 user = cputime64_add(user, kstat_cpu(i).cpustat.user);
368 nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
369 system = cputime64_add(system, kstat_cpu(i).cpustat.system);
370 idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
371 iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
372 irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
373 softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
374 steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
375 for (j = 0 ; j < NR_IRQS ; j++)
376 sum += kstat_cpu(i).irqs[j];
379 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu %llu\n",
380 (unsigned long long)cputime64_to_clock_t(user),
381 (unsigned long long)cputime64_to_clock_t(nice),
382 (unsigned long long)cputime64_to_clock_t(system),
383 (unsigned long long)cputime64_to_clock_t(idle),
384 (unsigned long long)cputime64_to_clock_t(iowait),
385 (unsigned long long)cputime64_to_clock_t(irq),
386 (unsigned long long)cputime64_to_clock_t(softirq),
387 (unsigned long long)cputime64_to_clock_t(steal));
388 for_each_online_cpu(i) {
390 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
391 user = kstat_cpu(i).cpustat.user;
392 nice = kstat_cpu(i).cpustat.nice;
393 system = kstat_cpu(i).cpustat.system;
394 idle = kstat_cpu(i).cpustat.idle;
395 iowait = kstat_cpu(i).cpustat.iowait;
396 irq = kstat_cpu(i).cpustat.irq;
397 softirq = kstat_cpu(i).cpustat.softirq;
398 steal = kstat_cpu(i).cpustat.steal;
399 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
401 (unsigned long long)cputime64_to_clock_t(user),
402 (unsigned long long)cputime64_to_clock_t(nice),
403 (unsigned long long)cputime64_to_clock_t(system),
404 (unsigned long long)cputime64_to_clock_t(idle),
405 (unsigned long long)cputime64_to_clock_t(iowait),
406 (unsigned long long)cputime64_to_clock_t(irq),
407 (unsigned long long)cputime64_to_clock_t(softirq),
408 (unsigned long long)cputime64_to_clock_t(steal));
410 seq_printf(p, "intr %llu", (unsigned long long)sum);
412 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
413 for (i = 0; i < NR_IRQS; i++)
414 seq_printf(p, " %u", kstat_irqs(i));
421 "procs_running %lu\n"
422 "procs_blocked %lu\n",
423 nr_context_switches(),
432 static int stat_open(struct inode *inode, struct file *file)
434 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
439 /* don't ask for more than the kmalloc() max size, currently 128 KB */
440 if (size > 128 * 1024)
442 buf = kmalloc(size, GFP_KERNEL);
446 res = single_open(file, show_stat, NULL);
448 m = file->private_data;
455 static struct file_operations proc_stat_operations = {
459 .release = single_release,
462 static int devices_read_proc(char *page, char **start, off_t off,
463 int count, int *eof, void *data)
465 int len = get_chrdev_list(page);
466 len += get_blkdev_list(page+len);
467 return proc_calc_metrics(page, start, off, count, eof, len);
473 static void *int_seq_start(struct seq_file *f, loff_t *pos)
475 return (*pos <= NR_IRQS) ? pos : NULL;
478 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
486 static void int_seq_stop(struct seq_file *f, void *v)
492 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
493 static struct seq_operations int_seq_ops = {
494 .start = int_seq_start,
495 .next = int_seq_next,
496 .stop = int_seq_stop,
497 .show = show_interrupts
500 static int interrupts_open(struct inode *inode, struct file *filp)
502 return seq_open(filp, &int_seq_ops);
505 static struct file_operations proc_interrupts_operations = {
506 .open = interrupts_open,
509 .release = seq_release,
512 static int filesystems_read_proc(char *page, char **start, off_t off,
513 int count, int *eof, void *data)
515 int len = get_filesystem_list(page);
516 return proc_calc_metrics(page, start, off, count, eof, len);
519 static int cmdline_read_proc(char *page, char **start, off_t off,
520 int count, int *eof, void *data)
524 len = sprintf(page, "%s\n", saved_command_line);
525 return proc_calc_metrics(page, start, off, count, eof, len);
528 static int locks_read_proc(char *page, char **start, off_t off,
529 int count, int *eof, void *data)
531 int len = get_locks_status(page, start, off, count);
538 static int execdomains_read_proc(char *page, char **start, off_t off,
539 int count, int *eof, void *data)
541 int len = get_exec_domain_list(page);
542 return proc_calc_metrics(page, start, off, count, eof, len);
545 #ifdef CONFIG_MAGIC_SYSRQ
547 * writing 'C' to /proc/sysrq-trigger is like sysrq-C
549 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
550 size_t count, loff_t *ppos)
555 if (get_user(c, buf))
557 __handle_sysrq(c, NULL, NULL, 0);
562 static struct file_operations proc_sysrq_trigger_operations = {
563 .write = write_sysrq_trigger,
567 struct proc_dir_entry *proc_root_kcore;
569 void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
571 struct proc_dir_entry *entry;
572 entry = create_proc_entry(name, mode, NULL);
574 entry->proc_fops = f;
577 void __init proc_misc_init(void)
579 struct proc_dir_entry *entry;
582 int (*read_proc)(char*,char**,off_t,int,int*,void*);
583 } *p, simple_ones[] = {
584 {"loadavg", loadavg_read_proc},
585 {"uptime", uptime_read_proc},
586 {"meminfo", meminfo_read_proc},
587 {"version", version_read_proc},
588 #ifdef CONFIG_PROC_HARDWARE
589 {"hardware", hardware_read_proc},
591 #ifdef CONFIG_STRAM_PROC
592 {"stram", stram_read_proc},
594 {"devices", devices_read_proc},
595 {"filesystems", filesystems_read_proc},
596 {"cmdline", cmdline_read_proc},
597 {"locks", locks_read_proc},
598 {"execdomains", execdomains_read_proc},
601 for (p = simple_ones; p->name; p++)
602 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
604 proc_symlink("mounts", NULL, "self/mounts");
606 /* And now for trickier ones */
607 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
609 entry->proc_fops = &proc_kmsg_operations;
610 create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
611 create_seq_entry("partitions", 0, &proc_partitions_operations);
612 create_seq_entry("stat", 0, &proc_stat_operations);
613 create_seq_entry("interrupts", 0, &proc_interrupts_operations);
614 create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
615 create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
616 create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
617 create_seq_entry("diskstats", 0, &proc_diskstats_operations);
618 #ifdef CONFIG_MODULES
619 create_seq_entry("modules", 0, &proc_modules_operations);
621 #ifdef CONFIG_SCHEDSTATS
622 create_seq_entry("schedstat", 0, &proc_schedstat_operations);
624 #ifdef CONFIG_PROC_KCORE
625 proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
626 if (proc_root_kcore) {
627 proc_root_kcore->proc_fops = &proc_kcore_operations;
628 proc_root_kcore->size =
629 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
632 crash_create_proc_entry();
633 #ifdef CONFIG_MAGIC_SYSRQ
634 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
636 entry->proc_fops = &proc_sysrq_trigger_operations;
638 crash_enable_by_proc();
641 extern struct file_operations ppc_htab_operations;
642 entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
644 entry->proc_fops = &ppc_htab_operations;