From 19acbd280406d4c1f69ca75a299f8d5076c5c6ff Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakobunt@gmail.com>
Date: Wed, 31 Jan 2018 23:01:37 +0100
Subject: [PATCH] Switch from syscall.Getdents to unix.Getdents

On mips64le, syscall.Getdents() and struct syscall.Dirent do
not fit together, causing our parseDirents() implementation to
return garbage ( see https://github.com/rfjakob/gocryptfs/issues/200
and https://github.com/golang/go/issues/23624 ).

Switch to unix.Getdents which does not have this problem -
the next Go release with the syscall package fixes is too
far away, and will take time to trickle into distros.

This issue has been reported by Debian maintainer
Felix Lechner.
---
 fuse/test/loopback_linux_test.go | 8 +++++---
 fuse/test/xfs_test.go            | 4 +++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/fuse/test/loopback_linux_test.go b/fuse/test/loopback_linux_test.go
index 47a652bca..e30839ae7 100644
--- a/fuse/test/loopback_linux_test.go
+++ b/fuse/test/loopback_linux_test.go
@@ -11,6 +11,8 @@ import (
 	"testing"
 	"time"
 
+	"golang.org/x/sys/unix"
+
 	"github.com/hanwen/go-fuse/fuse"
 )
 
@@ -143,7 +145,7 @@ func TestFallocate(t *testing.T) {
 	}
 }
 
-// Check that "." and ".." exists. syscall.Getdents is linux specific.
+// Check that "." and ".." exists. unix.Getdents is linux specific.
 func TestSpecialEntries(t *testing.T) {
 	tc := NewTestCase(t)
 	defer tc.Cleanup()
@@ -154,7 +156,7 @@ func TestSpecialEntries(t *testing.T) {
 	}
 	defer d.Close()
 	buf := make([]byte, 100)
-	n, err := syscall.Getdents(int(d.Fd()), buf)
+	n, err := unix.Getdents(int(d.Fd()), buf)
 	if n == 0 {
 		t.Errorf("directory is empty, entries '.' and '..' are missing")
 	}
@@ -180,7 +182,7 @@ func TestReaddirInodes(t *testing.T) {
 	buf := make([]byte, 100)
 	// readdir(3) use getdents64(2) internally which returns linux_dirent64
 	// structures. We don't have readdir(3) so we call getdents64(2) directly.
-	n, err := syscall.Getdents(int(d.Fd()), buf)
+	n, err := unix.Getdents(int(d.Fd()), buf)
 	if n == 0 {
 		t.Error("empty directory - we need at least one file")
 	}
diff --git a/fuse/test/xfs_test.go b/fuse/test/xfs_test.go
index b62da74dd..ce5242763 100644
--- a/fuse/test/xfs_test.go
+++ b/fuse/test/xfs_test.go
@@ -13,6 +13,8 @@ import (
 	"syscall"
 	"testing"
 	"unsafe"
+
+	"golang.org/x/sys/unix"
 )
 
 func clen(n []byte) int {
@@ -34,7 +36,7 @@ type CDirent struct {
 func parseDirents(buf []byte) []CDirent {
 	var result []CDirent
 	for len(buf) > 0 {
-		de := *(*syscall.Dirent)(unsafe.Pointer(&buf[0]))
+		de := *(*unix.Dirent)(unsafe.Pointer(&buf[0]))
 		buf = buf[de.Reclen:]
 		bytes := (*[10000]byte)(unsafe.Pointer(&de.Name[0]))
 		var name = string(bytes[0:clen(bytes[:])])