Function TestAutoclearTrueLoop

core/mount/losetup_linux_test.go:104–151

(t *testing.T)

}

func TestAutoclearTrueLoop(t *testing.T) {
	testutil.RequiresRoot(t)

	backingFile := createTempFile(t)
	bInfo, err := os.Stat(backingFile)
	require.NoError(t, err)
	bInode := bInfo.Sys().(*syscall.Stat_t).Ino

	file, err := SetupLoop(backingFile, LoopParams{Autoclear: true})
	require.NoError(t, err)
	dev := file.Name()
	file.Close()

	var checkFn = func(loopDev string, expectedInode uint64) (_shouldRetry bool, _ error) {
		loop, err := os.Open(loopDev)
		if err != nil {
			if os.IsNotExist(err) {
				return false, nil
			}
			return false, fmt.Errorf("failed to open loop device: %w", err)
		}
		info, err := unix.IoctlLoopGetStatus64(int(loop.Fd()))
		loop.Close()
		if err != nil {
			if errors.Is(err, unix.ENXIO) {
				return false, nil
			}
			return false, fmt.Errorf("failed to get loop device info: %w", err)
		}

		if info.Inode != expectedInode {
			return false, nil
		}

		t.Logf("loop device %s still present with backing inode %d", loopDev, expectedInode)
		return true, nil
	}

	for range 10 {
		retry, err := checkFn(dev, bInode)
		require.NoError(t, err)
		if !retry {
			return
		}
		time.Sleep(100 * time.Millisecond)
	}
	t.Fatalf("loop device %s still present after autoclear", dev)
}

func TestAutoclearFalseLoop(t *testing.T) {
	testutil.RequiresRoot(t)