Bluetooth: Manually enable or disable 6LoWPAN between devices

DEFINE_SIMPLE_ATTRIBUTE(conn_max_interval_fops, conn_max_interval_get,

			conn_max_interval_set, "%llu\n");

static ssize_t lowpan_read(struct file *file, char __user *user_buf,

			   size_t count, loff_t *ppos)

{

	struct hci_dev *hdev = file->private_data;

	char buf[3];

	buf[0] = test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags) ? 'Y' : 'N';

	buf[1] = '\n';

	buf[2] = '\0';

	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);

}

static ssize_t lowpan_write(struct file *fp, const char __user *user_buffer,

			    size_t count, loff_t *position)

{

	struct hci_dev *hdev = fp->private_data;

	bool enable;

	char buf[32];

	size_t buf_size = min(count, (sizeof(buf)-1));

	if (copy_from_user(buf, user_buffer, buf_size))

		return -EFAULT;

	buf[buf_size] = '\0';

	if (strtobool(buf, &enable) < 0)

		return -EINVAL;

	if (enable == test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags))

		return -EALREADY;

	change_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags);

	return count;

}

static const struct file_operations lowpan_debugfs_fops = {

	.open		= simple_open,

	.read		= lowpan_read,

	.write		= lowpan_write,

	.llseek		= default_llseek,

};

/* ---- HCI requests ---- */

static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)

				    hdev, &conn_min_interval_fops);

		debugfs_create_file("conn_max_interval", 0644, hdev->debugfs,

				    hdev, &conn_max_interval_fops);

		debugfs_create_file("6lowpan", 0644, hdev->debugfs, hdev,

				    &lowpan_debugfs_fops);

	}

	return 0;