421         struct vfs_dir_entry_t *parent_dentry = NULL;  in do_open()  local
427             parent_dentry = vfs_path_walk(path, 0);  in do_open()
428             if (parent_dentry == NULL)  in do_open()
436             parent_dentry = vfs_root_sb->root;  in do_open()
445         dentry->parent = parent_dentry;  in do_open()
448         spin_lock(&parent_dentry->lockref.lock);  in do_open()
449         spin_lock(&parent_dentry->dir_inode->lockref.lock);  in do_open()
451 …uint64_t retval = parent_dentry->dir_inode->inode_ops->create(parent_dentry->dir_inode, dentry, 0);  in do_open()
452         spin_unlock(&parent_dentry->dir_inode->lockref.lock); // 解锁inode  in do_open()
460             spin_unlock(&parent_dentry->lockref.lock);  in do_open()
467         if (!list_empty(&parent_dentry->subdirs_list))  in do_open()
469 …next_dentry = list_entry(list_next(&parent_dentry->subdirs_list), struct vfs_dir_entry_t, child_no…  in do_open()
472         list_add(&parent_dentry->subdirs_list, &dentry->child_node_list);  in do_open()
477         spin_unlock(&parent_dentry->lockref.lock);  in do_open()