rem: rootfs_lookup(fs_cookie _fs, fs_vnode _dir, const char *name, vnode_id *_id, int *_type)
add: rootfs_lookup(fs_volume _fs, fs_vnode _dir, const char *name, vnode_id *_id, int *_type)
context: rootfs_lookup(fs_cookie _fs, fs_vnode _dir, const char *name, vnode_id *_id, int *_type){	struct rootfs *fs = (struct rootfs *)_fs;	struct rootfs_vnode *dir = (struct rootfs_vnode *)_dir;	struct rootfs_vnode *vnode,*vdummy;	struct rootfs_vnode *v1;	status_t status;	TRACE(("rootfs_lookup: entry dir %p, name '%s'\n", dir, name));	if (dir->stream.type != STREAM_TYPE_DIR)		return B_NOT_A_DIRECTORY;	mutex_lock(&fs->lock);	// look it up	vnode = rootfs_find_in_dir(dir, name);	if (!vnode) {		status = B_ENTRY_NOT_FOUND;		goto err;	}	status = vfs_get_vnode(fs->id, vnode->id, (fs_vnode *)&vdummy);	if (status < 0)		goto err;	*_id = vnode->id;	*_type = vnode->stream.type;err:	mutex_unlock(&fs->lock);	return status;}