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//go:build linux
// +build linux
package fsutils // import "github.com/docker/docker/pkg/fsutils"
import (
"os"
"os/exec"
"testing"
"golang.org/x/sys/unix"
)
func testSupportsDType(t *testing.T, expected bool, mkfsCommand string, mkfsArg ...string) {
// check whether mkfs is installed
if _, err := exec.LookPath(mkfsCommand); err != nil {
t.Skipf("%s not installed: %v", mkfsCommand, err)
}
// create a sparse image
imageSize := int64(32 * 1024 * 1024)
imageFile, err := os.CreateTemp("", "fsutils-image")
if err != nil {
t.Fatal(err)
}
imageFileName := imageFile.Name()
defer os.Remove(imageFileName)
if _, err = imageFile.Seek(imageSize-1, 0); err != nil {
t.Fatal(err)
}
if _, err = imageFile.Write([]byte{0}); err != nil {
t.Fatal(err)
}
if err = imageFile.Close(); err != nil {
t.Fatal(err)
}
// create a mountpoint
mountpoint, err := os.MkdirTemp("", "fsutils-mountpoint")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(mountpoint)
// format the image
args := append(mkfsArg, imageFileName)
t.Logf("Executing `%s %v`", mkfsCommand, args)
out, err := exec.Command(mkfsCommand, args...).CombinedOutput()
if len(out) > 0 {
t.Log(string(out))
}
if err != nil {
t.Fatal(err)
}
// loopback-mount the image.
// for ease of setting up loopback device, we use os/exec rather than unix.Mount
out, err = exec.Command("mount", "-o", "loop", imageFileName, mountpoint).CombinedOutput()
if len(out) > 0 {
t.Log(string(out))
}
if err != nil {
t.Skip("skipping the test because mount failed")
}
defer func() {
if err := unix.Unmount(mountpoint, 0); err != nil {
t.Fatal(err)
}
}()
// check whether it supports d_type
result, err := SupportsDType(mountpoint)
if err != nil {
t.Fatal(err)
}
t.Logf("Supports d_type: %v", result)
if result != expected {
t.Fatalf("expected %v, got %v", expected, result)
}
}
func TestSupportsDTypeWithFType0XFS(t *testing.T) {
testSupportsDType(t, false, "mkfs.xfs", "-m", "crc=0", "-n", "ftype=0")
}
func TestSupportsDTypeWithFType1XFS(t *testing.T) {
testSupportsDType(t, true, "mkfs.xfs", "-m", "crc=0", "-n", "ftype=1")
}
func TestSupportsDTypeWithExt4(t *testing.T) {
testSupportsDType(t, true, "mkfs.ext4")
}
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