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package main
import (
"fmt"
"os"
"lukeshu.com/btrfs-tools/pkg/btrfs"
"lukeshu.com/btrfs-tools/pkg/btrfs/btrfsitem"
"lukeshu.com/btrfs-tools/pkg/btrfsmisc"
)
func main() {
if err := Main(os.Args[1]); err != nil {
fmt.Fprintf(os.Stderr, "%s: error: %v\n", os.Args[0], err)
os.Exit(1)
}
}
const version = "5.17"
func Main(imgfilename string) (err error) {
maybeSetErr := func(_err error) {
if _err != nil && err == nil {
err = _err
}
}
fh, err := os.Open(imgfilename)
if err != nil {
return err
}
defer func() {
maybeSetErr(fh.Close())
}()
fs := &btrfs.FS{
Devices: []*btrfs.Device{
{
File: fh,
},
},
}
if err := fs.Init(); err != nil {
fmt.Printf("(error) %v\n", err)
}
superblock, err := fs.Superblock()
if err != nil {
return err
}
fmt.Printf("btrfs-progs v%s \n", version)
if superblock.Data.RootTree != 0 {
fmt.Printf("root tree\n")
if err := btrfsmisc.PrintTree(fs, superblock.Data.RootTree); err != nil {
return err
}
}
if superblock.Data.ChunkTree != 0 {
fmt.Printf("chunk tree\n")
if err := btrfsmisc.PrintTree(fs, superblock.Data.ChunkTree); err != nil {
return err
}
}
if superblock.Data.LogTree != 0 {
fmt.Printf("log root tree\n")
if err := btrfsmisc.PrintTree(fs, superblock.Data.LogTree); err != nil {
return err
}
}
if superblock.Data.BlockGroupRoot != 0 {
fmt.Printf("block group tree\n")
if err := btrfsmisc.PrintTree(fs, superblock.Data.BlockGroupRoot); err != nil {
return err
}
}
if err := fs.WalkTree(superblock.Data.RootTree, btrfs.WalkTreeHandler{
Item: func(key btrfs.Key, body btrfsitem.Item) error {
if key.ItemType != btrfsitem.ROOT_ITEM_KEY {
return nil
}
treeName, ok := map[btrfs.ObjID]string{
btrfs.ROOT_TREE_OBJECTID: "root",
btrfs.EXTENT_TREE_OBJECTID: "extent",
btrfs.CHUNK_TREE_OBJECTID: "chunk",
btrfs.DEV_TREE_OBJECTID: "device",
btrfs.FS_TREE_OBJECTID: "fs",
btrfs.ROOT_TREE_DIR_OBJECTID: "directory",
btrfs.CSUM_TREE_OBJECTID: "checksum",
btrfs.ORPHAN_OBJECTID: "orphan",
btrfs.TREE_LOG_OBJECTID: "log",
btrfs.TREE_LOG_FIXUP_OBJECTID: "log fixup",
btrfs.TREE_RELOC_OBJECTID: "reloc",
btrfs.DATA_RELOC_TREE_OBJECTID: "data reloc",
btrfs.EXTENT_CSUM_OBJECTID: "extent checksum",
btrfs.QUOTA_TREE_OBJECTID: "quota",
btrfs.UUID_TREE_OBJECTID: "uuid",
btrfs.FREE_SPACE_TREE_OBJECTID: "free space",
btrfs.MULTIPLE_OBJECTIDS: "multiple",
btrfs.BLOCK_GROUP_TREE_OBJECTID: "block group",
}[key.ObjectID]
if !ok {
treeName = "file"
}
fmt.Printf("%s tree %s \n", treeName, btrfsmisc.FmtKey(key))
return btrfsmisc.PrintTree(fs, body.(btrfsitem.Root).ByteNr)
},
}); err != nil {
return err
}
fmt.Printf("total bytes %d\n", superblock.Data.TotalBytes)
fmt.Printf("bytes used %d\n", superblock.Data.BytesUsed)
fmt.Printf("uuid %v\n", superblock.Data.FSUUID)
return nil
}
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