1 files changed, 0 insertions, 79 deletions
diff --git a/lib/btrfs/btrfstree/readnode.go b/lib/btrfs/btrfstree/readnode.go
deleted file mode 100644
index a4ccf10..0000000
--- a/lib/btrfs/btrfstree/readnode.go
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright (C) 2022-2023  Luke Shumaker <lukeshu@lukeshu.com>
-//
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-package btrfstree
-
-import (
-	"fmt"
-
-	"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/containers"
-	"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)
-}
-
-// NodeExpectations returns the address to read and the expectations
-// to have when reading the node pointed to by this Path.
-//
-// `ok` is false if the path is empty or if this Path points to an
-// item rather than a node.
-func (path Path) NodeExpectations(fs NodeFile) (_ btrfsvol.LogicalAddr, _ NodeExpectations, ok bool) {
-	if path.Node(-1).ToNodeAddr == 0 && path.Node(-1).ToNodeGeneration == 0 && path.Node(-1).ToNodeLevel == 0 {
-		return 0, NodeExpectations{}, false
-	}
-
-	checkOwner := func(owner btrfsprim.ObjID, gen btrfsprim.Generation) error {
-		var treeParents []btrfsprim.ObjID
-
-		tree := path.Node(-1).FromTree
-		for {
-			if owner == tree {
-				// OK!
-				return nil
-			}
-
-			treeParents = append(treeParents, tree)
-			parent, parentGen, parentOK := fs.ParentTree(tree)
-			if !parentOK {
-				// Failed look up parent info; fail open.
-				return nil
-			}
-
-			if parent == 0 {
-				// End of the line.
-				return fmt.Errorf("expected owner in %v but claims to have owner=%v",
-					treeParents, owner)
-			}
-			if gen > parentGen {
-				return fmt.Errorf("claimed owner=%v might be acceptable in this tree (if generation<=%v) but not with claimed generation=%v",
-					owner, parentGen, gen)
-			}
-			tree = parent
-		}
-	}
-
-	return path.Node(-1).ToNodeAddr, NodeExpectations{
-		LAddr:      containers.OptionalValue(path.Node(-1).ToNodeAddr),
-		Level:      containers.OptionalValue(path.Node(-1).ToNodeLevel),
-		Generation: containers.OptionalValue(path.Node(-1).ToNodeGeneration),
-		Owner:      checkOwner,
-		MinItem:    containers.OptionalValue(path.Node(-1).ToKey),
-		MaxItem:    containers.OptionalValue(path.Node(-1).ToMaxKey),
-	}, true
-}