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package main
import (
"fmt"
"os"
"github.com/davecgh/go-spew/spew"
"lukeshu.com/btrfs-tools/pkg/btrfs"
"lukeshu.com/btrfs-tools/pkg/btrfsmisc"
"lukeshu.com/btrfs-tools/pkg/util"
)
func main() {
if err := Main(os.Args[1]); err != nil {
fmt.Fprintf(os.Stderr, "%v: error: %v\n", os.Args[0], err)
os.Exit(1)
}
}
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())
}()
dev := &btrfs.Device{
File: fh,
}
fs := new(btrfs.FS)
if err := fs.AddDevice(dev); err != nil {
return err
}
superblocks, err := fs.Superblocks()
if err != nil {
return err
}
spew := spew.NewDefaultConfig()
spew.DisablePointerAddresses = true
sum, err := superblocks[0].Data.CalculateChecksum()
if err != nil {
return err
}
fmt.Printf("superblock checksum: %v\n", sum)
spew.Dump(superblocks[0].Data)
syschunks, err := superblocks[0].Data.ParseSysChunkArray()
if err != nil {
return err
}
spew.Dump(syschunks)
if err := btrfsmisc.ScanForNodes(dev, superblocks[0].Data, func(nodeRef *util.Ref[btrfs.PhysicalAddr, btrfs.Node], err error) {
if err != nil {
fmt.Println(err)
} else {
fmt.Printf("node@%v: physical_addr=%v logical_addr=%v generation=%v owner=%v level=%v\n",
nodeRef.Addr,
nodeRef.Addr, nodeRef.Data.Head.Addr,
nodeRef.Data.Head.Generation, nodeRef.Data.Head.Owner, nodeRef.Data.Head.Level)
}
}, nil); err != nil {
return err
}
return nil
}
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