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// Copyright (C) 2022-2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package btrfstree
import (
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsprim"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
"git.lukeshu.com/btrfs-progs-ng/lib/diskio"
)
type NodeFile interface {
diskio.ReaderAt[btrfsvol.LogicalAddr]
// ParentTree, given a tree ID, returns that tree's parent
// tree, if it has one.
//
// - non-zero, ?, true : the parent tree ID
//
// - 0, 0, true : the tree does not have a parent
//
// - ?, ?, false : the tree's parent information could not be
// looked up
ParentTree(btrfsprim.ObjID) (btrfsprim.ObjID, btrfsprim.Generation, bool)
}
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