Set Nlink == 1 for GetAttr calls too.

Change-Id: I78393b40721d71a6ba4cdc634da079dec5669c26

fuse/nodefs/fsops.go

@@ -139,6 +139,12 @@ func (c *rawBridge) GetAttr(input *fuse.GetAttrIn, out *fuse.AttrOut) (code fuse
 		return code
 	}
 
+	if out.Nlink == 0 {
+		// With Nlink == 0, newer kernels will refuse link
+		// operations.
+		out.Nlink = 1
+	}
+
 	node.mount.fillAttr(out, input.NodeId)
 	return fuse.OK
 }

zipfs/zipfs_test.go

@@ -27,7 +27,7 @@ func setupZipfs(t *testing.T) (mountPoint string, cleanup func()) {
 	}
 
 	mountPoint, _ = ioutil.TempDir("", "")
-	state, _, err := nodefs.MountRoot(mountPoint, root, nil)
+	state, _, err := nodefs.MountRoot(mountPoint, root, &nodefs.Options{})
 
 	state.SetDebug(VerboseTest())
 	go state.Serve()