50 строки
1.1 KiB
C
50 строки
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/fs.h>
|
|
#include <linux/init.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/time.h>
|
|
#include <linux/time_namespace.h>
|
|
#include <linux/kernel_stat.h>
|
|
#include "internal.h"
|
|
|
|
static int uptime_proc_show(struct seq_file *m, void *v)
|
|
{
|
|
struct timespec64 uptime;
|
|
struct timespec64 idle;
|
|
u64 idle_nsec;
|
|
u32 rem;
|
|
int i;
|
|
|
|
idle_nsec = 0;
|
|
for_each_possible_cpu(i) {
|
|
struct kernel_cpustat kcs;
|
|
|
|
kcpustat_cpu_fetch(&kcs, i);
|
|
idle_nsec += get_idle_time(&kcs, i);
|
|
}
|
|
|
|
ktime_get_boottime_ts64(&uptime);
|
|
timens_add_boottime(&uptime);
|
|
|
|
idle.tv_sec = div_u64_rem(idle_nsec, NSEC_PER_SEC, &rem);
|
|
idle.tv_nsec = rem;
|
|
seq_printf(m, "%lu.%02lu %lu.%02lu\n",
|
|
(unsigned long) uptime.tv_sec,
|
|
(uptime.tv_nsec / (NSEC_PER_SEC / 100)),
|
|
(unsigned long) idle.tv_sec,
|
|
(idle.tv_nsec / (NSEC_PER_SEC / 100)));
|
|
return 0;
|
|
}
|
|
|
|
static int __init proc_uptime_init(void)
|
|
{
|
|
struct proc_dir_entry *pde;
|
|
|
|
pde = proc_create_single("uptime", 0, NULL, uptime_proc_show);
|
|
pde_make_permanent(pde);
|
|
return 0;
|
|
}
|
|
fs_initcall(proc_uptime_init);
|