128 lines
3.2 KiB
Go
128 lines
3.2 KiB
Go
//go:build !windows && !darwin
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/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package blockfile
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import (
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"testing"
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"github.com/containerd/containerd/v2/core/mount"
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)
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func setupSnapshotter(t *testing.T) ([]Opt, error) {
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mkfs, err := exec.LookPath("mkfs.ext4")
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if err != nil {
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t.Skipf("Could not find mkfs.ext4: %v", err)
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}
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loopbackSize := int64(8 << 20) // 8 MB
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if os.Getpagesize() > 4096 {
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loopbackSize = int64(16 << 20) // 16 MB
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}
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scratch := filepath.Join(t.TempDir(), "scratch")
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scratchDevFile, err := os.OpenFile(scratch, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
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if err != nil {
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return nil, fmt.Errorf("failed to create %s: %w", scratch, err)
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}
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if err := scratchDevFile.Truncate(loopbackSize); err != nil {
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scratchDevFile.Close()
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return nil, fmt.Errorf("failed to resize %s file: %w", scratch, err)
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}
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if err := scratchDevFile.Sync(); err != nil {
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scratchDevFile.Close()
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return nil, fmt.Errorf("failed to sync %s file: %w", scratch, err)
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}
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scratchDevFile.Close()
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if out, err := exec.Command(mkfs, scratch).CombinedOutput(); err != nil {
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return nil, fmt.Errorf("failed to make ext4 filesystem (out: %q): %w", out, err)
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}
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defaultOpts := []string{"loop", "direct-io", "sync"}
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if err := testMount(t, scratch, defaultOpts); err != nil {
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return nil, err
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}
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return []Opt{
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WithScratchFile(scratch),
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WithFSType("ext4"),
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WithMountOptions(defaultOpts),
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WithRecreateScratch(false), // reduce IO presure in CI
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withViewHookHelper(testViewHook),
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}, nil
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}
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func testMount(t *testing.T, scratchFile string, opts []string) error {
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root, err := os.MkdirTemp(t.TempDir(), "")
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if err != nil {
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return err
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}
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defer os.RemoveAll(root)
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m := []mount.Mount{
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{
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Type: "ext4",
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Source: scratchFile,
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Options: opts,
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},
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}
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if err := mount.All(m, root); err != nil {
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return fmt.Errorf("failed to mount device %s: %w", scratchFile, err)
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}
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if err := os.Remove(filepath.Join(root, "lost+found")); err != nil {
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return err
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}
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return mount.UnmountAll(root, 0)
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}
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func testViewHook(backingFile string, fsType string, defaultOpts []string) error {
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root, err := os.MkdirTemp("", "blockfile-testViewHook-XXXX")
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if err != nil {
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return err
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}
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defer os.RemoveAll(root)
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// FIXME(fuweid): Mount with rw to force fs to handle recover
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mountOpts := []mount.Mount{
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{
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Type: fsType,
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Source: backingFile,
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Options: defaultOpts,
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},
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}
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if err := mount.All(mountOpts, root); err != nil {
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return fmt.Errorf("failed to mount device %s: %w", backingFile, err)
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}
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if err := mount.UnmountAll(root, 0); err != nil {
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return fmt.Errorf("failed to unmount device %s: %w", backingFile, err)
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}
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return nil
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}
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