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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
// Copyright (C) 2022-2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package main
import (
"context"
"fmt"
"os"
"github.com/datawire/dlib/dgroup"
"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/btrfsvol"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfsutil"
"git.lukeshu.com/btrfs-progs-ng/lib/profile"
"git.lukeshu.com/btrfs-progs-ng/lib/textui"
)
type subcommand struct {
cobra.Command
RunE func(*btrfs.FS, *cobra.Command, []string) error
}
var inspectors, repairers []subcommand
var globalFlags struct {
logLevel textui.LogLevelFlag
pvs []string
mappings string
stopProfiling profile.StopFunc
openFlag int
}
func noError(err error) {
if err != nil {
panic(fmt.Errorf("should not happen: %w", err))
}
}
func main() {
// Base argparser
argparser := &cobra.Command{
Use: "btrfs-rec {[flags]|SUBCOMMAND}",
Short: "Recover (data from) a broken btrfs filesystem",
Args: cliutil.WrapPositionalArgs(cliutil.OnlySubcommands),
RunE: cliutil.RunSubcommands,
SilenceErrors: true, // main() will handle this after .ExecuteContext() returns
SilenceUsage: true, // our FlagErrorFunc will handle it
CompletionOptions: cobra.CompletionOptions{
DisableDefaultCmd: true,
},
}
argparser.SetFlagErrorFunc(cliutil.FlagErrorFunc)
argparser.SetHelpTemplate(cliutil.HelpTemplate)
// Global flags
globalFlags.logLevel.Level = dlog.LogLevelInfo
argparser.PersistentFlags().Var(&globalFlags.logLevel, "verbosity", "set the verbosity")
argparser.PersistentFlags().StringArrayVar(&globalFlags.pvs, "pv", nil, "open the file `physical_volume` as part of the filesystem")
noError(argparser.MarkPersistentFlagFilename("pv"))
noError(argparser.MarkPersistentFlagRequired("pv"))
argparser.PersistentFlags().StringVar(&globalFlags.mappings, "mappings", "", "load chunk/dev-extent/blockgroup data from external JSON file `mappings.json`")
noError(argparser.MarkPersistentFlagFilename("mappings"))
globalFlags.stopProfiling = profile.AddProfileFlags(argparser.PersistentFlags(), "profile.")
globalFlags.openFlag = os.O_RDONLY
// Sub-commands
argparserInspect := &cobra.Command{
Use: "inspect {[flags]|SUBCOMMAND}",
Short: "Inspect (but don't modify) a broken btrfs filesystem",
Args: cliutil.WrapPositionalArgs(cliutil.OnlySubcommands),
RunE: cliutil.RunSubcommands,
}
argparser.AddCommand(argparserInspect)
argparserRepair := &cobra.Command{
Use: "repair {[flags]|SUBCOMMAND}",
Short: "Repair a broken btrfs filesystem",
Args: cliutil.WrapPositionalArgs(cliutil.OnlySubcommands),
RunE: cliutil.RunSubcommands,
PersistentPreRunE: func(_ *cobra.Command, _ []string) error {
globalFlags.openFlag = os.O_RDWR
return nil
},
}
argparser.AddCommand(argparserRepair)
for _, cmdgrp := range []struct {
parent *cobra.Command
children []subcommand
}{
{argparserInspect, inspectors},
{argparserRepair, repairers},
} {
for _, child := range cmdgrp.children {
cmd := child.Command
runE := child.RunE
cmd.RunE = runWithRawFS(runE)
cmdgrp.parent.AddCommand(&cmd)
}
}
// Run
if err := argparser.ExecuteContext(context.Background()); err != nil {
textui.Fprintf(os.Stderr, "%v: error: %v\n", argparser.CommandPath(), err)
os.Exit(1)
}
}
func runWithRawFS(runE func(*btrfs.FS, *cobra.Command, []string) error) func(*cobra.Command, []string) error {
return func(cmd *cobra.Command, args []string) error {
ctx := cmd.Context()
logger := textui.NewLogger(os.Stderr, globalFlags.logLevel.Level)
ctx = dlog.WithLogger(ctx, logger)
if globalFlags.logLevel.Level >= dlog.LogLevelDebug {
ctx = dlog.WithField(ctx, "mem", new(textui.LiveMemUse))
}
dlog.SetFallbackLogger(logger.WithField("btrfs-progs.THIS_IS_A_BUG", true))
grp := dgroup.NewGroup(ctx, dgroup.GroupConfig{
EnableSignalHandling: true,
})
grp.Go("main", func(ctx context.Context) (err error) {
maybeSetErr := func(_err error) {
if _err != nil && err == nil {
err = _err
}
}
defer func() {
maybeSetErr(globalFlags.stopProfiling())
}()
fs, err := btrfsutil.Open(ctx, globalFlags.openFlag, globalFlags.pvs...)
if err != nil {
return err
}
defer func() {
maybeSetErr(fs.Close())
}()
if globalFlags.mappings != "" {
mappingsJSON, err := readJSONFile[[]btrfsvol.Mapping](ctx, globalFlags.mappings)
if err != nil {
return err
}
for _, mapping := range mappingsJSON {
if err := fs.LV.AddMapping(mapping); err != nil {
return err
}
}
}
cmd.SetContext(ctx)
return runE(fs, cmd, args)
})
return grp.Wait()
}
}
|
