417     sb_ptr->root = vfs_alloc_dentry(2);  in fat32_read_superblock()
419     sb_ptr->root->parent = sb_ptr->root;  in fat32_read_superblock()
420     sb_ptr->root->dir_ops = &fat32_dEntry_ops;  in fat32_read_superblock()
422     sb_ptr->root->name[0] = '/';  in fat32_read_superblock()
423     sb_ptr->root->name_length = 1;  in fat32_read_superblock()
426     sb_ptr->root->dir_inode = vfs_alloc_inode();  in fat32_read_superblock()
427     sb_ptr->root->dir_inode->inode_ops = &fat32_inode_ops;  in fat32_read_superblock()
428     sb_ptr->root->dir_inode->file_ops = &fat32_file_ops;  in fat32_read_superblock()
429     sb_ptr->root->dir_inode->file_size = 0;  in fat32_read_superblock()
431     sb_ptr->root->dir_inode->blocks =  in fat32_read_superblock()
432         (sb_ptr->root->dir_inode->file_size + fsbi->bytes_per_clus - 1) / fsbi->bytes_per_sec;  in fat32_read_superblock()
433     sb_ptr->root->dir_inode->attribute = VFS_IF_DIR;  in fat32_read_superblock()
434     sb_ptr->root->dir_inode->sb = sb_ptr; // 反向绑定对应的超级块  in fat32_read_superblock()
437     sb_ptr->root->dir_inode->private_inode_info = kmalloc(sizeof(struct fat32_inode_info_t), 0);  in fat32_read_superblock()
438     memset(sb_ptr->root->dir_inode->private_inode_info, 0, sizeof(struct fat32_inode_info_t));  in fat32_read_superblock()
439 …struct fat32_inode_info_t *finode = (struct fat32_inode_info_t *)sb_ptr->root->dir_inode->private_…  in fat32_read_superblock()
469     kfree(sb->root->dir_inode->private_inode_info);  in fat32_put_superblock()
470     kfree(sb->root->dir_inode);  in fat32_put_superblock()
471     kfree(sb->root);  in fat32_put_superblock()