stuff

1 files changed, 0 insertions, 116 deletions

diff --git a/pkg/btrfs/image.go b/pkg/btrfs/image.go
deleted file mode 100644
index ec49940..0000000
--- a/pkg/btrfs/image.go
+++ /dev/null
@@ -1,116 +0,0 @@
-package btrfs
-
-import (
-	"fmt"
-	"os"
-
-	"lukeshu.com/btrfs-tools/pkg/binstruct"
-)
-
-type Img struct {
-	*os.File
-}
-
-func (img *Img) Size() (int64, error) {
-	fi, err := img.Stat()
-	if err != nil {
-		return 0, err
-	}
-	return fi.Size(), nil
-}
-
-type Ref[T any] struct {
-	img  *Img
-	addr int64
-	Data T
-}
-
-func (r *Ref[T]) Read() error {
-	size, err := binstruct.Size(r.Data)
-	if err != nil {
-		return err
-	}
-	buf := make([]byte, size)
-	if _, err := r.img.ReadAt(buf, r.addr); err != nil {
-		return err
-	}
-	return binstruct.Unmarshal(buf, &r.Data)
-}
-
-var superblockAddrs = []int64{
-	0x00_0001_0000, // 64KiB
-	0x00_0400_0000, // 64MiB
-	0x40_0000_0000, // 256GiB
-}
-
-func (img *Img) Superblocks() ([]Ref[Superblock], error) {
-	const superblockSize = 0x1000
-
-	sz, err := img.Size()
-	if err != nil {
-		return nil, err
-	}
-
-	var ret []Ref[Superblock]
-	for i, addr := range superblockAddrs {
-		if addr+superblockSize <= sz {
-			superblock := Ref[Superblock]{
-				img:  img,
-				addr: addr,
-			}
-			if err := superblock.Read(); err != nil {
-				return nil, fmt.Errorf("superblock %d: %w", i, err)
-			}
-			ret = append(ret, superblock)
-		}
-	}
-	if len(ret) == 0 {
-		return nil, fmt.Errorf("no superblocks")
-	}
-	return ret, nil
-}
-
-// ScanForNodes mimics btrfs-progs
-// cmds/rescue-chunk-recover.c:scan_one_device(), except it doesn't do
-// anything but log when it finds a node.
-func (img *Img) ScanForNodes(sb Superblock) error {
-	devSize, err := img.Size()
-	if err != nil {
-		return err
-	}
-
-	if sb.NodeSize < sb.SectorSize {
-		return fmt.Errorf("node_size(%d) < sector_size(%d)",
-			sb.NodeSize, sb.SectorSize)
-	}
-
-	nodeBuf := make([]byte, sb.NodeSize)
-	for pos := int64(0); pos+int64(sb.SectorSize) <= devSize; pos += int64(sb.SectorSize) {
-		if inSlice(pos, superblockAddrs) {
-			fmt.Printf("sector@%d is a superblock\n", pos)
-			continue
-		}
-		if _, err := img.ReadAt(nodeBuf, pos); err != nil {
-			return fmt.Errorf("sector@%d: %w", pos, err)
-		}
-		var nodeHeader NodeHeader
-		if err := binstruct.Unmarshal(nodeBuf, &nodeHeader); err != nil {
-			return fmt.Errorf("sector@%d: %w", pos, err)
-		}
-		if !nodeHeader.MetadataUUID.Equal(sb.EffectiveMetadataUUID()) {
-			//fmt.Printf("sector@%d does not look like a node\n", pos)
-			continue
-		}
-		if !nodeHeader.Checksum.Equal(CRC32c(nodeBuf[0x20:])) {
-			fmt.Printf("sector@%d looks like a node but is corrupt (checksum doesn't match)\n", pos)
-			continue
-		}
-
-		fmt.Printf("node@%d: physical_addr=0x%0X logical_addr=0x%0X generation=%d owner=%v level=%d\n",
-			pos, pos, nodeHeader.Addr, nodeHeader.Generation, nodeHeader.Owner, nodeHeader.Level)
-
-		pos += int64(sb.NodeSize) - int64(sb.SectorSize)
-	}
-
-	return nil
-}