95 lines
1.7 KiB
C
95 lines
1.7 KiB
C
#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/time.h>
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#define DEV_CLASS_NAME "dev_class"
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#define DEVICE_NAME "test_rusage"
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static int major_num = 0;
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static struct class *test_class = NULL;
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static struct device *test_dev = NULL;
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static int dev_open(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static int dev_release(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static long dev_ioctl(struct file *file, unsigned int request, unsigned long arg)
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{
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mdelay(request * 1000);
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return 0;
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/*
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struct timespec s_time, c_time;
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getnstimeofday(&s_time);
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while (1) {
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getnstimeofday(&c_time);
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if ( c_time.tv_sec >= s_time.tv_sec + request &&
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c_time.tv_nsec >= s_time.tv_nsec) {
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break;
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}
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}
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return 0;
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*/
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}
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static struct file_operations fops = {
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.open = dev_open,
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.release = dev_release,
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.unlocked_ioctl = dev_ioctl,
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};
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static int register_device(void)
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{
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major_num = register_chrdev(0, DEVICE_NAME, &fops);
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if (major_num < 0) {
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printk(KERN_ALERT "failed\n");
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return major_num;
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}
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test_class = class_create(THIS_MODULE, DEV_CLASS_NAME);
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test_dev = device_create(test_class, NULL, MKDEV(major_num, 0), NULL, DEVICE_NAME);
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return 0;
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}
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void unregister_device(void)
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{
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device_destroy(test_class, MKDEV(major_num, 0));
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class_unregister(test_class);
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class_destroy(test_class);
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unregister_chrdev(major_num, DEVICE_NAME);
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}
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static int __init dev_init(void)
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{
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register_device();
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return 0;
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}
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module_init(dev_init);
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static void __exit dev_exit(void)
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{
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unregister_device();
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}
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module_exit(dev_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Test for getrusage");
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MODULE_VERSION("1.0");
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