nodefs: futimens() on loopbackfile.

nodefs/files_linux.go

@@ -28,9 +28,7 @@ func (f *loopbackFile) Utimens(ctx context.Context, a *time.Time, m *time.Time)
 	ts[0] = fuse.UtimeToTimespec(a)
 	ts[1] = fuse.UtimeToTimespec(m)
 	f.mu.Lock()
-	var err error
-	// NOSUBMIT
-	//	err := futimens(int(f.File.Fd()), &ts)
+	err := futimens(int(f.File.Fd()), &ts)
 	f.mu.Unlock()
 	return fuse.ToStatus(err)
 }

nodefs/syscall_linux.go

+// Copyright 2016 the Go-FUSE Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package nodefs
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// futimens - futimens(3) calls utimensat(2) with "pathname" set to null and
+// "flags" set to zero
+func futimens(fd int, times *[2]syscall.Timespec) (err error) {
+	_, _, e1 := syscall.Syscall6(syscall.SYS_UTIMENSAT, uintptr(fd), 0, uintptr(unsafe.Pointer(times)), uintptr(0), 0, 0)
+	if e1 != 0 {
+		err = syscall.Errno(e1)
+	}
+	return
+}