| 1 | |
| 2 | #include <linux/fs.h>
|
| 3 | #include <linux/init.h>
|
| 4 | #include <linux/proc_fs.h>
|
| 5 | #include <linux/sched.h>
|
| 6 | #include <linux/seq_file.h>
|
| 7 | #include <linux/time.h>
|
| 8 | #include <linux/time_namespace.h>
|
| 9 | #include <linux/kernel_stat.h>
|
| 10 | #include "internal.h"
|
| 11 |
|
| 12 | static int uptime_proc_show(struct seq_file *m, void *v)
|
| 13 | {
|
| 14 | struct timespec64 uptime;
|
| 15 | struct timespec64 idle;
|
| 16 | u64 idle_nsec;
|
| 17 | u32 rem;
|
| 18 |
|
| 19 | idle_nsec = kcpustat_field_total(CPUTIME_IDLE, cpu_possible_mask);
|
| 20 | ktime_get_boottime_ts64(&uptime);
|
| 21 | timens_add_boottime(&uptime);
|
| 22 |
|
| 23 | idle.tv_sec = div_u64_rem(idle_nsec, NSEC_PER_SEC, &rem);
|
| 24 | idle.tv_nsec = rem;
|
| 25 | seq_printf(m, "%lu.%02lu %lu.%02lu\n",
|
| 26 | (unsigned long) uptime.tv_sec,
|
| 27 | (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
|
| 28 | (unsigned long) idle.tv_sec,
|
| 29 | (idle.tv_nsec / (NSEC_PER_SEC / 100)));
|
| 30 | return 0;
|
| 31 | }
|
| 32 |
|
| 33 | static int __init proc_uptime_init(void)
|
| 34 | {
|
| 35 | struct proc_dir_entry *pde;
|
| 36 |
|
| 37 | pde = proc_create_single("uptime", 0, NULL, uptime_proc_show);
|
| 38 | pde_make_permanent(pde);
|
| 39 | return 0;
|
| 40 | }
|
| 41 | fs_initcall(proc_uptime_init);
|