1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
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()
},
})
}
|
