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
|
package snapshot
import (
"os"
"path/filepath"
"syscall"
"github.com/containerd/containerd/mount"
"github.com/containerd/containerd/pkg/userns"
rootlessmountopts "github.com/moby/buildkit/util/rootless/mountopts"
"github.com/pkg/errors"
)
func (lm *localMounter) Mount() (string, error) {
lm.mu.Lock()
defer lm.mu.Unlock()
if lm.mounts == nil && lm.mountable != nil {
mounts, release, err := lm.mountable.Mount()
if err != nil {
return "", err
}
lm.mounts = mounts
lm.release = release
}
if userns.RunningInUserNS() {
var err error
lm.mounts, err = rootlessmountopts.FixUp(lm.mounts)
if err != nil {
return "", err
}
}
var isFile bool
if len(lm.mounts) == 1 && (lm.mounts[0].Type == "bind" || lm.mounts[0].Type == "rbind") {
if !lm.forceRemount {
ro := false
for _, opt := range lm.mounts[0].Options {
if opt == "ro" {
ro = true
break
}
}
if !ro {
return lm.mounts[0].Source, nil
}
}
fi, err := os.Stat(lm.mounts[0].Source)
if err != nil {
return "", err
}
if !fi.IsDir() {
isFile = true
}
}
dest, err := os.MkdirTemp("", "buildkit-mount")
if err != nil {
return "", errors.Wrap(err, "failed to create temp dir")
}
if isFile {
dest = filepath.Join(dest, "file")
if err := os.WriteFile(dest, []byte{}, 0644); err != nil {
os.RemoveAll(dest)
return "", errors.Wrap(err, "failed to create temp file")
}
}
if err := mount.All(lm.mounts, dest); err != nil {
os.RemoveAll(dest)
return "", errors.Wrapf(err, "failed to mount %s: %+v", dest, lm.mounts)
}
lm.target = dest
return dest, nil
}
func (lm *localMounter) Unmount() error {
lm.mu.Lock()
defer lm.mu.Unlock()
if lm.target != "" {
if err := mount.Unmount(lm.target, syscall.MNT_DETACH); err != nil {
return err
}
os.RemoveAll(lm.target)
lm.target = ""
}
if lm.release != nil {
return lm.release()
}
return nil
}
|
