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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
package main
import (
"fmt"
"os"
"path/filepath"
"sort"
"strings"
"sync"
"syscall"
"github.com/hanwen/go-fuse/fuse"
"github.com/rfjakob/gocryptfs/internal/exitcodes"
"github.com/rfjakob/gocryptfs/internal/fusefrontend"
"github.com/rfjakob/gocryptfs/internal/tlog"
)
type fsckObj struct {
fs *fusefrontend.FS
// List of corrupt files
corruptList []string
// Protects corruptList
corruptListLock sync.Mutex
}
func (ck *fsckObj) markCorrupt(path string) {
ck.corruptListLock.Lock()
ck.corruptList = append(ck.corruptList, path)
ck.corruptListLock.Unlock()
}
// Recursively check dir for corruption
func (ck *fsckObj) dir(path string) {
//fmt.Printf("ck.dir %q\n", path)
ck.xattrs(path)
done := make(chan struct{})
go func() {
for {
select {
case item := <-ck.fs.MitigatedCorruptions:
fmt.Printf("fsck: corrupt entry in dir %q: %q\n", path, item)
ck.markCorrupt(filepath.Join(path, item))
case <-done:
return
}
}
}()
entries, status := ck.fs.OpenDir(path, nil)
done <- struct{}{}
if !status.Ok() {
ck.markCorrupt(path)
fmt.Printf("fsck: error opening dir %q: %v\n", path, status)
return
}
// Sort alphabetically
sort.Sort(sortableDirEntries(entries))
for _, entry := range entries {
if entry.Name == "." || entry.Name == ".." {
continue
}
nextPath := filepath.Join(path, entry.Name)
filetype := entry.Mode & syscall.S_IFMT
//fmt.Printf(" %q %x\n", entry.Name, entry.Mode)
switch filetype {
case syscall.S_IFDIR:
ck.dir(nextPath)
case syscall.S_IFREG:
ck.file(nextPath)
case syscall.S_IFLNK:
ck.symlink(nextPath)
case syscall.S_IFIFO, syscall.S_IFSOCK, syscall.S_IFBLK, syscall.S_IFCHR:
// nothing to check
default:
fmt.Printf("fsck: unhandled file type %x\n", filetype)
}
}
}
func (ck *fsckObj) symlink(path string) {
_, status := ck.fs.Readlink(path, nil)
if !status.Ok() {
ck.markCorrupt(path)
fmt.Printf("fsck: error reading symlink %q: %v\n", path, status)
}
}
// check file for corruption
func (ck *fsckObj) file(path string) {
//fmt.Printf("ck.file %q\n", path)
ck.xattrs(path)
f, status := ck.fs.Open(path, syscall.O_RDONLY, nil)
if !status.Ok() {
ck.markCorrupt(path)
fmt.Printf("fsck: error opening file %q: %v\n", path, status)
return
}
defer f.Release()
buf := make([]byte, fuse.MAX_KERNEL_WRITE)
var off int64
done := make(chan struct{})
go func() {
for {
select {
case item := <-ck.fs.MitigatedCorruptions:
fmt.Printf("fsck: corrupt file %q (inode %s)\n", path, item)
ck.markCorrupt(path)
case <-done:
return
}
}
}()
defer func() { done <- struct{}{} }()
for {
result, status := f.Read(buf, off)
if !status.Ok() {
ck.markCorrupt(path)
fmt.Printf("fsck: error reading file %q at offset %d: %v\n", path, off, status)
return
}
// EOF
if result.Size() == 0 {
return
}
off += int64(result.Size())
}
}
// Check xattrs on file/dir at path
func (ck *fsckObj) xattrs(path string) {
done := make(chan struct{})
go func() {
for {
select {
case item := <-ck.fs.MitigatedCorruptions:
fmt.Printf("fsck: corrupt xattr name on file %q: %q\n", path, item)
ck.markCorrupt(path + " xattr:" + item)
case <-done:
return
}
}
}()
attrs, status := ck.fs.ListXAttr(path, nil)
done <- struct{}{}
if !status.Ok() {
fmt.Printf("fsck: error listing xattrs on %q: %v\n", path, status)
ck.markCorrupt(path)
return
}
for _, a := range attrs {
_, status := ck.fs.GetXAttr(path, a, nil)
if !status.Ok() {
fmt.Printf("fsck: error reading xattr %q from %q: %v\n", a, path, status)
ck.markCorrupt(path)
}
}
}
func fsck(args *argContainer) {
if args.reverse {
tlog.Fatal.Printf("Running -fsck with -reverse is not supported")
os.Exit(exitcodes.Usage)
}
args.allow_other = false
pfs, wipeKeys := initFuseFrontend(args)
fs := pfs.(*fusefrontend.FS)
fs.MitigatedCorruptions = make(chan string)
ck := fsckObj{
fs: fs,
}
ck.dir("")
wipeKeys()
if len(ck.corruptList) == 0 {
tlog.Info.Printf("fsck summary: no problems found\n")
return
}
fmt.Printf("fsck summary: %d corrupt files\n", len(ck.corruptList))
os.Exit(exitcodes.FsckErrors)
}
type sortableDirEntries []fuse.DirEntry
func (s sortableDirEntries) Len() int {
return len(s)
}
func (s sortableDirEntries) Swap(i, j int) {
s[i], s[j] = s[j], s[i]
}
func (s sortableDirEntries) Less(i, j int) bool {
return strings.Compare(s[i].Name, s[j].Name) < 0
}
|
