C++ (Cpp) vtpm_proxy_delete_proxy_dev Examples

Example #1

File: tpm_vtpm_proxy.c Project: dznm/linux

/*
 * Create a /dev/tpm%d and 'server side' file descriptor pair
 *
 * Return value:
 *      Returns file pointer on success, an error value otherwise
 */
static struct file *vtpm_proxy_create_device(
				 struct vtpm_proxy_new_dev *vtpm_new_dev)
{
	struct proxy_dev *proxy_dev;
	int rc, fd;
	struct file *file;

	if (vtpm_new_dev->flags & ~VTPM_PROXY_FLAGS_ALL)
		return ERR_PTR(-EOPNOTSUPP);

	proxy_dev = vtpm_proxy_create_proxy_dev();
	if (IS_ERR(proxy_dev))
		return ERR_CAST(proxy_dev);

	proxy_dev->flags = vtpm_new_dev->flags;

	/* setup an anonymous file for the server-side */
	fd = get_unused_fd_flags(O_RDWR);
	if (fd < 0) {
		rc = fd;
		goto err_delete_proxy_dev;
	}

	file = anon_inode_getfile("[vtpms]", &vtpm_proxy_fops, proxy_dev,
				  O_RDWR);
	if (IS_ERR(file)) {
		rc = PTR_ERR(file);
		goto err_put_unused_fd;
	}

	/* from now on we can unwind with put_unused_fd() + fput() */
	/* simulate an open() on the server side */
	vtpm_proxy_fops_open(file);

	if (proxy_dev->flags & VTPM_PROXY_FLAG_TPM2)
		proxy_dev->chip->flags |= TPM_CHIP_FLAG_TPM2;

	vtpm_proxy_work_start(proxy_dev);

	vtpm_new_dev->fd = fd;
	vtpm_new_dev->major = MAJOR(proxy_dev->chip->dev.devt);
	vtpm_new_dev->minor = MINOR(proxy_dev->chip->dev.devt);
	vtpm_new_dev->tpm_num = proxy_dev->chip->dev_num;

	return file;

err_put_unused_fd:
	put_unused_fd(fd);

err_delete_proxy_dev:
	vtpm_proxy_delete_proxy_dev(proxy_dev);

	return ERR_PTR(rc);
}

Example #2

File: tpm_vtpm_proxy.c Project: AK101111/linux

/*
 * Counter part to vtpm_create_device.
 */
static void vtpm_proxy_delete_device(struct proxy_dev *proxy_dev)
{
	vtpm_proxy_work_stop(proxy_dev);

	/*
	 * A client may hold the 'ops' lock, so let it know that the server
	 * side shuts down before we try to grab the 'ops' lock when
	 * unregistering the chip.
	 */
	vtpm_proxy_fops_undo_open(proxy_dev);

	tpm_chip_unregister(proxy_dev->chip);

	vtpm_proxy_delete_proxy_dev(proxy_dev);
}