fusefrontend: add xattr support

At the moment, only for reverse mode.

https://github.com/rfjakob/gocryptfs/issues/217

1 files changed, 96 insertions, 0 deletions

diff --git a/tests/xattr/xattr_integration_test.go b/tests/xattr/xattr_integration_test.go
new file mode 100644
index 0000000..1e081c2
--- /dev/null
+++ b/tests/xattr/xattr_integration_test.go
@@ -0,0 +1,96 @@
+package defaults
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+	"testing"
+
+	xattr "github.com/rfjakob/pkg-xattr"
+
+	"github.com/rfjakob/gocryptfs/tests/test_helpers"
+)
+
+// On modern Linux distributions, /tmp may be on tmpfs,
+// which does not support user xattrs. Try /var/tmp instead.
+var alternateTestParentDir = "/var/tmp/gocryptfs-xattr-test-parent"
+
+func TestMain(m *testing.M) {
+	if !xattr.Supported(test_helpers.TmpDir) {
+		test_helpers.SwitchTestParentDir(alternateTestParentDir)
+	}
+	if !xattr.Supported(test_helpers.TmpDir) {
+		fmt.Printf("xattrs not supported on %q", test_helpers.TmpDir)
+		os.Exit(1)
+	}
+	test_helpers.ResetTmpDir(true)
+	test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "-zerokey")
+	r := m.Run()
+	test_helpers.UnmountPanic(test_helpers.DefaultPlainDir)
+	os.RemoveAll(test_helpers.TmpDir)
+	os.Exit(r)
+}
+
+func TestXattrSetGetRm(t *testing.T) {
+	attr := "user.foo"
+	fn := test_helpers.DefaultPlainDir + "/TestXattrSetGetRm"
+	err := ioutil.WriteFile(fn, nil, 0700)
+	if err != nil {
+		t.Fatalf("creating empty file failed: %v", err)
+	}
+	// Set
+	val1 := []byte("123456789")
+	err = xattr.Set(fn, attr, val1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Read back
+	val2, err := xattr.Get(fn, attr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(val1, val2) {
+		t.Fatalf("wrong readback value: %v != %v", val1, val2)
+	}
+	// Remove
+	err = xattr.Remove(fn, attr)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Read back
+	val3, err := xattr.Get(fn, attr)
+	if err == nil {
+		t.Fatalf("attr is still there after deletion!? val3=%v", val3)
+	}
+}
+
+func TestXattrList(t *testing.T) {
+	fn := test_helpers.DefaultPlainDir + "/TestXattrList"
+	err := ioutil.WriteFile(fn, nil, 0700)
+	if err != nil {
+		t.Fatalf("creating empty file failed: %v", err)
+	}
+	val := []byte("xxxxxxxxyyyyyyyyyyyyyyyzzzzzzzzzzzzz")
+	num := 20
+	for i := 1; i <= num; i++ {
+		attr := fmt.Sprintf("user.TestXattrList.%02d", i)
+		err = xattr.Set(fn, attr, val)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	names, err := xattr.List(fn)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(names) != num {
+		t.Errorf("wrong number of names, want=%d have=%d", num, len(names))
+	}
+	for _, n := range names {
+		if !strings.HasPrefix(n, "user.TestXattrList.") {
+			t.Errorf("unexpected attr name: %q", n)
+		}
+	}
+}