fsck: add xattr support

With testcases.

fsck.go

@@ -28,6 +28,7 @@ func (ck *fsckObj) markCorrupt(path string) {
 // Recursively check dir for corruption
 func (ck *fsckObj) dir(path string) {
 	//fmt.Printf("ck.dir %q\n", path)
+	ck.xattrs(path)
 	entries, status := ck.fs.OpenDir(path, nil)
 	if !status.Ok() {
 		ck.markCorrupt(path)
@@ -53,7 +54,7 @@ func (ck *fsckObj) dir(path string) {
 		case syscall.S_IFIFO, syscall.S_IFSOCK, syscall.S_IFBLK, syscall.S_IFCHR:
 			// nothing to check
 		default:
-			fmt.Printf("fsck: unhandle file type %x\n", filetype)
+			fmt.Printf("fsck: unhandled file type %x\n", filetype)
 		}
 	}
 }
@@ -69,6 +70,7 @@ func (ck *fsckObj) symlink(path string) {
 // check file for corruption
 func (ck *fsckObj) file(path string) {
 	//fmt.Printf("ck.file %q\n", path)
+	ck.xattrs(path)
 	f, status := ck.fs.Open(path, syscall.O_RDONLY, nil)
 	if !status.Ok() {
 		ck.markCorrupt(path)
@@ -93,6 +95,23 @@ func (ck *fsckObj) file(path string) {
 	}
 }
 
+// Check xattrs on file/dir at path
+func (ck *fsckObj) xattrs(path string) {
+	attrs, status := ck.fs.ListXAttr(path, nil)
+	if !status.Ok() {
+		fmt.Printf("fsck: error listing xattrs on %q: %v\n", path, status)
+		ck.markCorrupt(path)
+		return
+	}
+	for _, a := range attrs {
+		_, status := ck.fs.GetXAttr(path, a, nil)
+		if !status.Ok() {
+			fmt.Printf("fsck: error reading xattr %q from %q: %v\n", a, path, status)
+			ck.markCorrupt(path)
+		}
+	}
+}
+
 func fsck(args *argContainer) {
 	if args.reverse {
 		tlog.Fatal.Printf("Running -fsck with -reverse is not supported")

tests/fsck/fsck_test.go

@@ -6,11 +6,27 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/pkg/xattr"
+
 	"github.com/rfjakob/gocryptfs/internal/exitcodes"
 	"github.com/rfjakob/gocryptfs/tests/test_helpers"
 )
 
 func TestBrokenFsV14(t *testing.T) {
+	// git does not save extended attributes, so we apply them here.
+	// xattr_good
+	xattr.Set("broken_fs_v1.4/6nGs4Ugr3EAHd0KzkyLZ-Q",
+		"user.gocryptfs.0a5e7yWl0SGUGeWB0Sy2Kg",
+		[]byte("hxnZvXSkDicfwVS9w4r1yYkFF61Qou6NaL-VhObYEdu6kuM"))
+	// xattr_corrupt_name
+	xattr.Set("broken_fs_v1.4/CMyUifVTjW5fsgXonWBT_RDkvLkdGrLttkZ45T3Oi3A",
+		"user.gocryptfs.0a5e7yWl0SGUGeWB0Sy2K0",
+		[]byte("QHUMDTgbnl8Sv_A2dFQic_G2vN4_gmDna3651JAhF7OZ-YI"))
+	// xattr_corrupt_value
+	xattr.Set("broken_fs_v1.4/b00sbnGXGToadr01GHZaYQn8tjyRhe1OXNBZoQtMlcQ",
+		"user.gocryptfs.0a5e7yWl0SGUGeWB0Sy2Kg",
+		[]byte("A0hvCePeKpL8bCpijhDKtf7cIijXYQsPnEbNJ84M2ONW0dd"))
+
 	cmd := exec.Command(test_helpers.GocryptfsBinary, "-fsck", "-extpass", "echo test", "broken_fs_v1.4")
 	outBin, err := cmd.CombinedOutput()
 	out := string(outBin)