89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
//go:build !windows && !darwin
|
|
|
|
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package blockfile
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"path/filepath"
|
|
"testing"
|
|
|
|
"github.com/containerd/containerd/mount"
|
|
"github.com/containerd/continuity/fs"
|
|
"github.com/containerd/continuity/testutil/loopback"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
func setupSnapshotter(t *testing.T) ([]Opt, error) {
|
|
mkfs, err := exec.LookPath("mkfs.ext4")
|
|
if err != nil {
|
|
t.Skipf("Could not find mkfs.ext4: %v", err)
|
|
}
|
|
|
|
loopbackSize := int64(128 << 20) // 128 MB
|
|
if os.Getpagesize() > 4096 {
|
|
loopbackSize = int64(650 << 20) // 650 MB
|
|
}
|
|
|
|
loop, err := loopback.New(loopbackSize)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer loop.Close()
|
|
|
|
if out, err := exec.Command(mkfs, loop.Device).CombinedOutput(); err != nil {
|
|
return nil, fmt.Errorf("failed to make ext4 filesystem (out: %q): %w", out, err)
|
|
}
|
|
// sync after a mkfs on the loopback before trying to mount the device
|
|
unix.Sync()
|
|
|
|
if err := testMount(t, loop.Device); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
scratch := filepath.Join(t.TempDir(), "scratch")
|
|
err = fs.CopyFile(scratch, loop.File)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return []Opt{
|
|
WithScratchFile(scratch),
|
|
WithFSType("ext4"),
|
|
WithMountOptions([]string{"loop", "sync"}),
|
|
}, nil
|
|
}
|
|
|
|
func testMount(t *testing.T, device string) error {
|
|
root, err := os.MkdirTemp(t.TempDir(), "")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer os.RemoveAll(root)
|
|
|
|
if out, err := exec.Command("mount", device, root).CombinedOutput(); err != nil {
|
|
return fmt.Errorf("failed to mount device %s (out: %q): %w", device, out, err)
|
|
}
|
|
if err := os.Remove(filepath.Join(root, "lost+found")); err != nil {
|
|
return err
|
|
}
|
|
return mount.UnmountAll(root, unix.MNT_DETACH)
|
|
}
|