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/vs_base.h>
48 #include <linux/vs_cvirt.h>
50 #include <asm/uaccess.h>
51 #include <asm/pgtable.h>
53 #include <asm/pgalloc.h>
55 #include <asm/div64.h>
57 #define LOAD_INT(x) ((x) >> FSHIFT)
58 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
60 * Warning: stuff below (imported functions) assumes that its output will fit
61 * into one page. For some of those functions it may be wrong. Moreover, we
62 * have a way to deal with that gracefully. Right now I used straightforward
63 * wrappers, but this needs further analysis wrt potential overflows.
65 extern int get_hardware_list(char *);
66 extern int get_stram_list(char *);
67 extern int get_chrdev_list(char *);
68 extern int get_blkdev_list(char *);
69 extern int get_filesystem_list(char *);
70 extern int get_exec_domain_list(char *);
71 extern int get_dma_list(char *);
72 extern int get_locks_status (char *, char **, off_t, int);
73 #ifdef CONFIG_SGI_DS1286
74 extern int get_ds1286_status(char *);
77 static int proc_calc_metrics(char *page, char **start, off_t off,
78 int count, int *eof, int len)
80 if (len <= off+count) *eof = 1;
83 if (len>count) len = count;
88 static int loadavg_read_proc(char *page, char **start, off_t off,
89 int count, int *eof, void *data)
94 a = avenrun[0] + (FIXED_1/200);
95 b = avenrun[1] + (FIXED_1/200);
96 c = avenrun[2] + (FIXED_1/200);
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, last_pid);
102 return proc_calc_metrics(page, start, off, count, eof, len);
105 struct vmalloc_info {
107 unsigned long largest_chunk;
110 static struct vmalloc_info get_vmalloc_info(void)
112 unsigned long prev_end = VMALLOC_START;
113 struct vm_struct* vma;
114 struct vmalloc_info vmi;
117 read_lock(&vmlist_lock);
120 vmi.largest_chunk = (VMALLOC_END-VMALLOC_START);
122 vmi.largest_chunk = 0;
124 for (vma = vmlist; vma; vma = vma->next) {
125 unsigned long free_area_size =
126 (unsigned long)vma->addr - prev_end;
127 vmi.used += vma->size;
128 if (vmi.largest_chunk < free_area_size )
130 vmi.largest_chunk = free_area_size;
131 prev_end = vma->size + (unsigned long)vma->addr;
133 if(VMALLOC_END-prev_end > vmi.largest_chunk)
134 vmi.largest_chunk = VMALLOC_END-prev_end;
136 read_unlock(&vmlist_lock);
140 static int uptime_read_proc(char *page, char **start, off_t off,
141 int count, int *eof, void *data)
143 struct timespec uptime;
144 struct timespec idle;
146 u64 idle_jiffies = init_task.utime + init_task.stime;
148 do_posix_clock_monotonic_gettime(&uptime);
149 jiffies_to_timespec(idle_jiffies, &idle);
150 if (vx_flags(VXF_VIRT_UPTIME, 0))
151 vx_vsi_uptime(&uptime, &idle);
153 len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
154 (unsigned long) uptime.tv_sec,
155 (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
156 (unsigned long) idle.tv_sec,
157 (idle.tv_nsec / (NSEC_PER_SEC / 100)));
159 return proc_calc_metrics(page, start, off, count, eof, len);
162 static int meminfo_read_proc(char *page, char **start, off_t off,
163 int count, int *eof, void *data)
167 struct page_state ps;
168 unsigned long inactive;
169 unsigned long active;
172 struct vmalloc_info vmi;
175 get_zone_counts(&active, &inactive, &free);
178 * display in kilobytes.
180 #define K(x) ((x) << (PAGE_SHIFT - 10))
183 committed = atomic_read(&vm_committed_space);
185 vmtot = (VMALLOC_END-VMALLOC_START)>>10;
186 vmi = get_vmalloc_info();
188 vmi.largest_chunk >>= 10;
191 * Tagged format, for easy grepping and expansion.
194 "MemTotal: %8lu kB\n"
198 "SwapCached: %8lu kB\n"
200 "Inactive: %8lu kB\n"
201 "HighTotal: %8lu kB\n"
202 "HighFree: %8lu kB\n"
203 "LowTotal: %8lu kB\n"
205 "SwapTotal: %8lu kB\n"
206 "SwapFree: %8lu kB\n"
208 "Writeback: %8lu kB\n"
211 "Committed_AS: %8u kB\n"
212 "PageTables: %8lu kB\n"
213 "VmallocTotal: %8lu kB\n"
214 "VmallocUsed: %8lu kB\n"
215 "VmallocChunk: %8lu kB\n",
219 K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
220 K(total_swapcache_pages),
225 K(i.totalram-i.totalhigh),
226 K(i.freeram-i.freehigh),
234 K(ps.nr_page_table_pages),
240 len += hugetlb_report_meminfo(page + len);
242 return proc_calc_metrics(page, start, off, count, eof, len);
246 extern struct seq_operations fragmentation_op;
247 static int fragmentation_open(struct inode *inode, struct file *file)
250 return seq_open(file, &fragmentation_op);
253 static struct file_operations fragmentation_file_operations = {
254 .open = fragmentation_open,
257 .release = seq_release,
260 static int version_read_proc(char *page, char **start, off_t off,
261 int count, int *eof, void *data)
263 extern char *linux_banner;
266 strcpy(page, linux_banner);
268 return proc_calc_metrics(page, start, off, count, eof, len);
271 extern struct seq_operations cpuinfo_op;
272 static int cpuinfo_open(struct inode *inode, struct file *file)
274 return seq_open(file, &cpuinfo_op);
276 static struct file_operations proc_cpuinfo_operations = {
277 .open = cpuinfo_open,
280 .release = seq_release,
283 extern struct seq_operations vmstat_op;
284 static int vmstat_open(struct inode *inode, struct file *file)
286 return seq_open(file, &vmstat_op);
288 static struct file_operations proc_vmstat_file_operations = {
292 .release = seq_release,
295 #ifdef CONFIG_PROC_HARDWARE
296 static int hardware_read_proc(char *page, char **start, off_t off,
297 int count, int *eof, void *data)
299 int len = get_hardware_list(page);
300 return proc_calc_metrics(page, start, off, count, eof, len);
304 #ifdef CONFIG_STRAM_PROC
305 static int stram_read_proc(char *page, char **start, off_t off,
306 int count, int *eof, void *data)
308 int len = get_stram_list(page);
309 return proc_calc_metrics(page, start, off, count, eof, len);
313 extern struct seq_operations partitions_op;
314 static int partitions_open(struct inode *inode, struct file *file)
316 return seq_open(file, &partitions_op);
318 static struct file_operations proc_partitions_operations = {
319 .open = partitions_open,
322 .release = seq_release,
325 extern struct seq_operations diskstats_op;
326 static int diskstats_open(struct inode *inode, struct file *file)
328 return seq_open(file, &diskstats_op);
330 static struct file_operations proc_diskstats_operations = {
331 .open = diskstats_open,
334 .release = seq_release,
337 #ifdef CONFIG_MODULES
338 extern struct seq_operations modules_op;
339 static int modules_open(struct inode *inode, struct file *file)
341 return seq_open(file, &modules_op);
343 static struct file_operations proc_modules_operations = {
344 .open = modules_open,
347 .release = seq_release,
351 extern struct seq_operations slabinfo_op;
352 extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
353 static int slabinfo_open(struct inode *inode, struct file *file)
355 return seq_open(file, &slabinfo_op);
357 static struct file_operations proc_slabinfo_operations = {
358 .open = slabinfo_open,
360 .write = slabinfo_write,
362 .release = seq_release,
365 int show_stat(struct seq_file *p, void *v)
368 extern unsigned long total_forks;
370 u64 sum = 0, user = 0, nice = 0, system = 0,
371 idle = 0, iowait = 0, irq = 0, softirq = 0;
373 jif = - wall_to_monotonic.tv_sec;
374 if (wall_to_monotonic.tv_nsec)
380 user += kstat_cpu(i).cpustat.user;
381 nice += kstat_cpu(i).cpustat.nice;
382 system += kstat_cpu(i).cpustat.system;
383 idle += kstat_cpu(i).cpustat.idle;
384 iowait += kstat_cpu(i).cpustat.iowait;
385 irq += kstat_cpu(i).cpustat.irq;
386 softirq += kstat_cpu(i).cpustat.softirq;
387 for (j = 0 ; j < NR_IRQS ; j++)
388 sum += kstat_cpu(i).irqs[j];
391 seq_printf(p, "cpu %llu %llu %llu %llu %llu %llu %llu\n",
392 (unsigned long long)jiffies_64_to_clock_t(user),
393 (unsigned long long)jiffies_64_to_clock_t(nice),
394 (unsigned long long)jiffies_64_to_clock_t(system),
395 (unsigned long long)jiffies_64_to_clock_t(idle),
396 (unsigned long long)jiffies_64_to_clock_t(iowait),
397 (unsigned long long)jiffies_64_to_clock_t(irq),
398 (unsigned long long)jiffies_64_to_clock_t(softirq));
399 for_each_online_cpu(i) {
401 /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
402 user = kstat_cpu(i).cpustat.user;
403 nice = kstat_cpu(i).cpustat.nice;
404 system = kstat_cpu(i).cpustat.system;
405 idle = kstat_cpu(i).cpustat.idle;
406 iowait = kstat_cpu(i).cpustat.iowait;
407 irq = kstat_cpu(i).cpustat.irq;
408 softirq = kstat_cpu(i).cpustat.softirq;
409 seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu\n",
411 (unsigned long long)jiffies_64_to_clock_t(user),
412 (unsigned long long)jiffies_64_to_clock_t(nice),
413 (unsigned long long)jiffies_64_to_clock_t(system),
414 (unsigned long long)jiffies_64_to_clock_t(idle),
415 (unsigned long long)jiffies_64_to_clock_t(iowait),
416 (unsigned long long)jiffies_64_to_clock_t(irq),
417 (unsigned long long)jiffies_64_to_clock_t(softirq));
419 seq_printf(p, "intr %llu", (unsigned long long)sum);
421 #if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
422 for (i = 0; i < NR_IRQS; i++)
423 seq_printf(p, " %u", kstat_irqs(i));
430 "procs_running %lu\n"
431 "procs_blocked %lu\n",
432 nr_context_switches(),
441 static int stat_open(struct inode *inode, struct file *file)
443 unsigned size = 4096 * (1 + num_possible_cpus() / 32);
448 /* don't ask for more than the kmalloc() max size, currently 128 KB */
449 if (size > 128 * 1024)
451 buf = kmalloc(size, GFP_KERNEL);
455 res = single_open(file, show_stat, NULL);
457 m = file->private_data;
464 static struct file_operations proc_stat_operations = {
468 .release = single_release,
471 static int devices_read_proc(char *page, char **start, off_t off,
472 int count, int *eof, void *data)
474 int len = get_chrdev_list(page);
475 len += get_blkdev_list(page+len);
476 return proc_calc_metrics(page, start, off, count, eof, len);
482 static void *int_seq_start(struct seq_file *f, loff_t *pos)
484 return (*pos <= NR_IRQS) ? pos : NULL;
487 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
495 static void int_seq_stop(struct seq_file *f, void *v)
501 extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
502 static struct seq_operations int_seq_ops = {
503 .start = int_seq_start,
504 .next = int_seq_next,
505 .stop = int_seq_stop,
506 .show = show_interrupts
509 int interrupts_open(struct inode *inode, struct file *filp)
511 return seq_open(filp, &int_seq_ops);
514 static struct file_operations proc_interrupts_operations = {
515 .open = interrupts_open,
518 .release = seq_release,
521 static int filesystems_read_proc(char *page, char **start, off_t off,
522 int count, int *eof, void *data)
524 int len = get_filesystem_list(page);
525 return proc_calc_metrics(page, start, off, count, eof, len);
528 static int cmdline_read_proc(char *page, char **start, off_t off,
529 int count, int *eof, void *data)
531 extern char saved_command_line[];
534 len = sprintf(page, "%s\n", saved_command_line);
535 return proc_calc_metrics(page, start, off, count, eof, len);
538 #ifdef CONFIG_SGI_DS1286
539 static int ds1286_read_proc(char *page, char **start, off_t off,
540 int count, int *eof, void *data)
542 int len = get_ds1286_status(page);
543 return proc_calc_metrics(page, start, off, count, eof, len);
547 static int locks_read_proc(char *page, char **start, off_t off,
548 int count, int *eof, void *data)
550 int len = get_locks_status(page, start, off, count);
557 static int execdomains_read_proc(char *page, char **start, off_t off,
558 int count, int *eof, void *data)
560 int len = get_exec_domain_list(page);
561 return proc_calc_metrics(page, start, off, count, eof, len);
565 * This function accesses profiling information. The returned data is
566 * binary: the sampling step and the actual contents of the profile
567 * buffer. Use of the program readprofile is recommended in order to
568 * get meaningful info out of these data.
571 read_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos)
573 unsigned long p = *ppos;
576 unsigned int sample_step = 1 << prof_shift;
578 if (p >= (prof_len+1)*sizeof(unsigned int))
580 if (count > (prof_len+1)*sizeof(unsigned int) - p)
581 count = (prof_len+1)*sizeof(unsigned int) - p;
584 while (p < sizeof(unsigned int) && count > 0) {
585 put_user(*((char *)(&sample_step)+p),buf);
586 buf++; p++; count--; read++;
588 pnt = (char *)prof_buffer + p - sizeof(unsigned int);
589 if (copy_to_user(buf,(void *)pnt,count))
597 * Writing to /proc/profile resets the counters
599 * Writing a 'profiling multiplier' value into it also re-sets the profiling
600 * interrupt frequency, on architectures that support this.
602 static ssize_t write_profile(struct file *file, const char __user *buf,
603 size_t count, loff_t *ppos)
606 extern int setup_profiling_timer (unsigned int multiplier);
608 if (count == sizeof(int)) {
609 unsigned int multiplier;
611 if (copy_from_user(&multiplier, buf, sizeof(int)))
614 if (setup_profiling_timer(multiplier))
619 memset(prof_buffer, 0, prof_len * sizeof(*prof_buffer));
623 static struct file_operations proc_profile_operations = {
624 .read = read_profile,
625 .write = write_profile,
628 #ifdef CONFIG_MAGIC_SYSRQ
630 * writing 'C' to /proc/sysrq-trigger is like sysrq-C
632 static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
633 size_t count, loff_t *ppos)
638 if (get_user(c, buf))
640 __handle_sysrq(c, NULL, NULL);
645 static struct file_operations proc_sysrq_trigger_operations = {
646 .write = write_sysrq_trigger,
650 struct proc_dir_entry *proc_root_kcore;
652 static void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
654 struct proc_dir_entry *entry;
655 entry = create_proc_entry(name, mode, NULL);
657 entry->proc_fops = f;
660 void __init proc_misc_init(void)
662 struct proc_dir_entry *entry;
665 int (*read_proc)(char*,char**,off_t,int,int*,void*);
666 } *p, simple_ones[] = {
667 {"loadavg", loadavg_read_proc},
668 {"uptime", uptime_read_proc},
669 {"meminfo", meminfo_read_proc},
670 {"version", version_read_proc},
671 #ifdef CONFIG_PROC_HARDWARE
672 {"hardware", hardware_read_proc},
674 #ifdef CONFIG_STRAM_PROC
675 {"stram", stram_read_proc},
677 {"devices", devices_read_proc},
678 {"filesystems", filesystems_read_proc},
679 {"cmdline", cmdline_read_proc},
680 #ifdef CONFIG_SGI_DS1286
681 {"rtc", ds1286_read_proc},
683 {"locks", locks_read_proc},
684 {"execdomains", execdomains_read_proc},
687 for (p = simple_ones; p->name; p++)
688 create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
690 proc_symlink("mounts", NULL, "self/mounts");
692 /* And now for trickier ones */
693 entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
695 entry->proc_fops = &proc_kmsg_operations;
696 create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
697 create_seq_entry("partitions", 0, &proc_partitions_operations);
698 create_seq_entry("stat", 0, &proc_stat_operations);
699 create_seq_entry("interrupts", 0, &proc_interrupts_operations);
700 create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
701 create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
702 create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
703 create_seq_entry("diskstats", 0, &proc_diskstats_operations);
704 #ifdef CONFIG_MODULES
705 create_seq_entry("modules", 0, &proc_modules_operations);
707 #ifdef CONFIG_PROC_KCORE
708 proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
709 if (proc_root_kcore) {
710 proc_root_kcore->proc_fops = &proc_kcore_operations;
711 proc_root_kcore->size =
712 (size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
716 entry = create_proc_entry("profile", S_IWUSR | S_IRUGO, NULL);
718 entry->proc_fops = &proc_profile_operations;
719 entry->size = (1+prof_len) * sizeof(unsigned int);
722 #ifdef CONFIG_MAGIC_SYSRQ
723 entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
725 entry->proc_fops = &proc_sysrq_trigger_operations;
729 extern struct file_operations ppc_htab_operations;
730 entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
732 entry->proc_fops = &ppc_htab_operations;