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// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package main
import (
"context"
"fmt"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsutil"
"git.lukeshu.com/btrfs-progs-ng/lib/diskio"
)
func pass2(ctx context.Context, fs *btrfs.FS, foundNodes map[btrfsvol.LogicalAddr]struct{}) {
fmt.Printf("\nPass 2: orphaned nodes\n")
visitedNodes := make(map[btrfsvol.LogicalAddr]struct{})
btrfsutil.WalkAllTrees(ctx, fs, btrfsutil.WalkAllTreesHandler{
TreeWalkHandler: btrfs.TreeWalkHandler{
Node: func(path btrfs.TreePath, node *diskio.Ref[btrfsvol.LogicalAddr, btrfs.Node]) error {
visitedNodes[node.Addr] = struct{}{}
return nil
},
},
Err: func(err *btrfsutil.WalkError) {
fmt.Printf("Pass 2: walk FS: error: %v\n", err)
},
})
orphanedNodes := make(map[btrfsvol.LogicalAddr]int)
for foundNode := range foundNodes {
if _, visited := visitedNodes[foundNode]; !visited {
orphanedNodes[foundNode] = 0
}
}
orphanedRoots := make(map[btrfsvol.LogicalAddr]struct{}, len(orphanedNodes))
for node := range orphanedNodes {
orphanedRoots[node] = struct{}{}
}
/*
for potentialRoot := range orphanedRoots {
if err := fs.TreeWalk(potentialRoot, btrfs.TreeWalkHandler{
Node: func(path btrfs.TreePath, _ *diskio.Ref[btrfsvol.LogicalAddr, btrfs.Node], _ error) error {
nodeAddr := path[len(path)-1].NodeAddr
if nodeAddr != potentialRoot {
delete(orphanedRoots, nodeAddr)
}
orphanedNodes[nodeAddr] = orphanedNodes[nodeAddr] + 1
visitCnt := orphanedNodes[nodeAddr]
if visitCnt > 1 {
return iofs.SkipDir
}
return nil
},
}); err != nil {
fmt.Printf("Pass 2: walk orphans: error: %v\n", err)
}
}
for _, node := range maps.SortedKeys(orphanedRoots) {
fmt.Printf("Pass 2: orphaned root: %v\n", node)
}
*/
}
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