eCryptfs: initialize persistent lower file on inode create

 */

static struct inode *ecryptfs_alloc_inode(struct super_block *sb)

{

	struct ecryptfs_inode_info *ecryptfs_inode;

	struct ecryptfs_inode_info *inode_info;

	struct inode *inode = NULL;

	ecryptfs_inode = kmem_cache_alloc(ecryptfs_inode_info_cache,

					  GFP_KERNEL);

	if (unlikely(!ecryptfs_inode))

	inode_info = kmem_cache_alloc(ecryptfs_inode_info_cache, GFP_KERNEL);

	if (unlikely(!inode_info))

		goto out;

	ecryptfs_init_crypt_stat(&ecryptfs_inode->crypt_stat);

	inode = &ecryptfs_inode->vfs_inode;

	ecryptfs_init_crypt_stat(&inode_info->crypt_stat);

	mutex_init(&inode_info->lower_file_mutex);

	inode_info->lower_file = NULL;

	inode = &inode_info->vfs_inode;

out:

	return inode;

}