diff options
| -rw-r--r-- | cmd/btrfs-rec/inpsect_dbg.go | 73 | ||||
| -rwxr-xr-x | scripts/main.sh | 3 |
2 files changed, 76 insertions, 0 deletions
diff --git a/cmd/btrfs-rec/inpsect_dbg.go b/cmd/btrfs-rec/inpsect_dbg.go new file mode 100644 index 0000000..a0dd92e --- /dev/null +++ b/cmd/btrfs-rec/inpsect_dbg.go @@ -0,0 +1,73 @@ +// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com> +// +// SPDX-License-Identifier: GPL-2.0-or-later + +package main + +import ( + "bufio" + "fmt" + "os" + + "github.com/datawire/dlib/dlog" + "github.com/datawire/ocibuild/pkg/cliutil" + "github.com/spf13/cobra" + + "git.lukeshu.com/btrfs-progs-ng/lib/btrfs" + "git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsitem" + "git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol" + "git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsinspect/scanforextents" + "git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsutil" +) + +func init() { + inspectors = append(inspectors, subcommand{ + Command: cobra.Command{ + Use: "dbg DUMPSUMS.gob", + Args: cliutil.WrapPositionalArgs(cobra.ExactArgs(1)), + }, + RunE: func(fs *btrfs.FS, cmd *cobra.Command, args []string) error { + ctx := cmd.Context() + + dlog.Infof(ctx, "Reading %q...", args[0]) + sums, err := scanforextents.ReadAllSums(args[0]) + if err != nil { + return err + } + dlog.Infof(ctx, "... done reading %q", args[0]) + + out := bufio.NewWriter(os.Stdout) + + dlog.Info(ctx, "Walking sum tree...") + btrfsutil.NewBrokenTrees(ctx, fs).TreeWalk(ctx, btrfs.CSUM_TREE_OBJECTID, + func(err *btrfs.TreeError) { + dlog.Error(ctx, err) + }, + btrfs.TreeWalkHandler{ + Item: func(path btrfs.TreePath, item btrfs.Item) error { + if item.Key.ItemType != btrfsitem.EXTENT_CSUM_KEY { + return nil + } + body := item.Body.(btrfsitem.ExtentCSum) + + for i, sum := range body.Sums { + laddr := btrfsvol.LogicalAddr(item.Key.Offset) + (btrfsvol.LogicalAddr(i) * scanforextents.CSumBlockSize) + fmt.Fprintf(out, "walk: %v=%q\n", + laddr, scanforextents.ShortSum(sum[:body.ChecksumSize])) + } + return nil + }, + }, + ) + + dlog.Info(ctx, "Dumping gob...") + _ = sums.WalkLogical(ctx, func(laddr btrfsvol.LogicalAddr, sum scanforextents.ShortSum) error { + fmt.Fprintf(out, "gob: %v=%q\n", + laddr, sum) + return nil + }) + + return out.Flush() + }, + }) +} diff --git a/scripts/main.sh b/scripts/main.sh index 08d747b..bc8b01d 100755 --- a/scripts/main.sh +++ b/scripts/main.sh @@ -27,6 +27,9 @@ gen $b.gen/1.mappings.json \ gen $b.gen/2.csums.gob \ ./btrfs-rec --pv=$b.img --mappings=$b.gen/1.mappings.json \ inspect dump-sums +# gen $b.gen/3.dbg.txt \ +# ./btrfs-rec --pv=$b.img --mappings=$b.gen/1.mappings.json \ +# inspect dbg $b.gen/2.csums.gob gen $b.gen/3.mappings.json \ ./btrfs-rec --pv=$b.img --mappings=$b.gen/1.mappings.json \ inspect scan-for-extents $b.gen/0.scan-for-nodes.json $b.gen/2.csums.gob |