C++ (Cpp) generic_file_write_nolockの例

コード例 #1

ファイル: raw.c プロジェクト: sarnobat/knoppix

static ssize_t raw_file_write(struct file *file, const char *buf,
				   size_t count, loff_t *ppos)
{
	struct iovec local_iov = { .iov_base = (void *)buf, .iov_len = count };

	return generic_file_write_nolock(file, &local_iov, 1, ppos);
}

static ssize_t raw_file_aio_write(struct kiocb *iocb, const char *buf,
					size_t count, loff_t pos)
{
	struct iovec local_iov = { .iov_base = (void *)buf, .iov_len = count };

	return generic_file_aio_write_nolock(iocb, &local_iov, 1, &iocb->ki_pos);
}


static struct file_operations raw_fops = {
	.read	=	generic_file_read,
	.aio_read = 	generic_file_aio_read,
	.write	=	raw_file_write,
	.aio_write = 	raw_file_aio_write,
	.open	=	raw_open,
	.release=	raw_release,
	.ioctl	=	raw_ioctl,
	.readv	= 	generic_file_readv,
	.writev	= 	generic_file_writev,
	.owner	=	THIS_MODULE,
};

static struct file_operations raw_ctl_fops = {
	.ioctl	=	raw_ctl_ioctl,
	.open	=	raw_open,
	.owner	=	THIS_MODULE,
};

static int __init raw_init(void)
{
	int i;

	register_chrdev(RAW_MAJOR, "raw", &raw_fops);
	devfs_mk_cdev(MKDEV(RAW_MAJOR, 0),
		      S_IFCHR | S_IRUGO | S_IWUGO,
		      "raw/rawctl");
	for (i = 1; i < MAX_RAW_MINORS; i++)
		devfs_mk_cdev(MKDEV(RAW_MAJOR, i),
			      S_IFCHR | S_IRUGO | S_IWUGO,
			      "raw/raw%d", i);
	return 0;
}

static void __exit raw_exit(void)
{
	int i;

	for (i = 1; i < MAX_RAW_MINORS; i++)
		devfs_remove("raw/raw%d", i);
	devfs_remove("raw/rawctl");
	devfs_remove("raw");
	unregister_chrdev(RAW_MAJOR, "raw");
}

コード例 #2

ファイル: raw.c プロジェクト: iPodLinux/linux-2.6.7-ipod

static ssize_t raw_file_write(struct file *file, const char __user *buf,
				   size_t count, loff_t *ppos)
{
	struct iovec local_iov = {
		.iov_base = (char __user *)buf,
		.iov_len = count
	};

	return generic_file_write_nolock(file, &local_iov, 1, ppos);
}

static ssize_t raw_file_aio_write(struct kiocb *iocb, const char __user *buf,
					size_t count, loff_t pos)
{
	struct iovec local_iov = {
		.iov_base = (char __user *)buf,
		.iov_len = count
	};

	return generic_file_aio_write_nolock(iocb, &local_iov, 1, &iocb->ki_pos);
}


static struct file_operations raw_fops = {
	.read	=	generic_file_read,
	.aio_read = 	generic_file_aio_read,
	.write	=	raw_file_write,
	.aio_write = 	raw_file_aio_write,
	.open	=	raw_open,
	.release=	raw_release,
	.ioctl	=	raw_ioctl,
	.readv	= 	generic_file_readv,
	.writev	= 	generic_file_writev,
	.owner	=	THIS_MODULE,
};

static struct file_operations raw_ctl_fops = {
	.ioctl	=	raw_ctl_ioctl,
	.open	=	raw_open,
	.owner	=	THIS_MODULE,
};

static struct cdev raw_cdev = {
	.kobj	=	{.name = "raw", },
	.owner	=	THIS_MODULE,
};

static int __init raw_init(void)
{
	int i;
	dev_t dev = MKDEV(RAW_MAJOR, 0);

	if (register_chrdev_region(dev, MAX_RAW_MINORS, "raw"))
		goto error;

	cdev_init(&raw_cdev, &raw_fops);
	if (cdev_add(&raw_cdev, dev, MAX_RAW_MINORS)) {
		kobject_put(&raw_cdev.kobj);
		unregister_chrdev_region(dev, MAX_RAW_MINORS);
		goto error;
	}

	devfs_mk_cdev(MKDEV(RAW_MAJOR, 0),
		      S_IFCHR | S_IRUGO | S_IWUGO,
		      "raw/rawctl");
	for (i = 1; i < MAX_RAW_MINORS; i++)
		devfs_mk_cdev(MKDEV(RAW_MAJOR, i),
			      S_IFCHR | S_IRUGO | S_IWUGO,
			      "raw/raw%d", i);
	return 0;

error:
	printk(KERN_ERR "error register raw device\n");
	return 1;
}