diff options
Diffstat (limited to 'cmd/btrfs-clear-bad-nodes')
| -rw-r--r-- | cmd/btrfs-clear-bad-nodes/main.go | 81 |
1 files changed, 57 insertions, 24 deletions
diff --git a/cmd/btrfs-clear-bad-nodes/main.go b/cmd/btrfs-clear-bad-nodes/main.go index 754e08b..098d862 100644 --- a/cmd/btrfs-clear-bad-nodes/main.go +++ b/cmd/btrfs-clear-bad-nodes/main.go @@ -5,6 +5,7 @@ import ( "os" "lukeshu.com/btrfs-tools/pkg/btrfs" + "lukeshu.com/btrfs-tools/pkg/btrfs/btrfsitem" "lukeshu.com/btrfs-tools/pkg/btrfs/btrfsvol" "lukeshu.com/btrfs-tools/pkg/btrfsmisc" "lukeshu.com/btrfs-tools/pkg/util" @@ -33,9 +34,11 @@ func Main(imgfilenames ...string) (err error) { }() var treeName string + var treeID btrfs.ObjID btrfsmisc.WalkFS(fs, btrfsmisc.WalkFSHandler{ - PreTree: func(name string, _ btrfsvol.LogicalAddr) { + PreTree: func(name string, id btrfs.ObjID, _ btrfsvol.LogicalAddr) { treeName = name + treeID = id }, Err: func(err error) { fmt.Printf("error: %v\n", err) @@ -48,29 +51,59 @@ func Main(imgfilenames ...string) (err error) { } origErr := err if len(path) < 2 { - // TODO(lukeshu): Get info from the superblock and such - // instead of the parent node, so that we can repair broken - // root nodes. - return fmt.Errorf("root node: %w", err) - } - parentNode, err := fs.ReadNode(path[len(path)-2].NodeAddr) - if err != nil { - return err - } - node.Data = btrfs.Node{ - Size: node.Data.Size, - ChecksumType: node.Data.ChecksumType, - Head: btrfs.NodeHeader{ - //Checksum: filled below, - MetadataUUID: parentNode.Data.Head.MetadataUUID, - Addr: node.Addr, - Flags: btrfs.NodeWritten, - BackrefRev: parentNode.Data.Head.BackrefRev, - Generation: 0, - Owner: parentNode.Data.Head.Owner, - NumItems: 0, - Level: parentNode.Data.Head.Level - 1, - }, + sb, err := fs.Superblock() + if err != nil { + return err + } + chunkRoot, err := fs.TreeLookup(sb.Data.RootTree, btrfs.Key{ + ObjectID: btrfs.CHUNK_TREE_OBJECTID, + ItemType: btrfsitem.ROOT_ITEM_KEY, + Offset: 0, + }) + if err != nil { + return err + } + chunkRootBody, ok := chunkRoot.Body.(btrfsitem.Root) + if !ok { + return fmt.Errorf("CHUNK_TREE_OBJECTID ROOT_ITEM has malformed body") + } + node.Data = btrfs.Node{ + Size: node.Data.Size, + ChecksumType: node.Data.ChecksumType, + Head: btrfs.NodeHeader{ + //Checksum: filled below, + MetadataUUID: sb.Data.EffectiveMetadataUUID(), + Addr: node.Addr, + Flags: btrfs.NodeWritten, + BackrefRev: btrfs.MixedBackrefRev, + ChunkTreeUUID: chunkRootBody.UUID, + Generation: 0, + Owner: treeID, + NumItems: 0, + Level: 0, + }, + } + } else { + parentNode, err := fs.ReadNode(path[len(path)-2].NodeAddr) + if err != nil { + return err + } + node.Data = btrfs.Node{ + Size: node.Data.Size, + ChecksumType: node.Data.ChecksumType, + Head: btrfs.NodeHeader{ + //Checksum: filled below, + MetadataUUID: parentNode.Data.Head.MetadataUUID, + Addr: node.Addr, + Flags: btrfs.NodeWritten, + BackrefRev: parentNode.Data.Head.BackrefRev, + ChunkTreeUUID: parentNode.Data.Head.ChunkTreeUUID, + Generation: 0, + Owner: parentNode.Data.Head.Owner, + NumItems: 0, + Level: parentNode.Data.Head.Level - 1, + }, + } } node.Data.Head.Checksum, err = node.Data.CalculateChecksum() if err != nil { |