Made Server an interface, for expandability.

mounted_file_system.go

@@ -22,9 +22,11 @@ import (
 	"golang.org/x/net/context"
 )
 
-// A Server is a function that reads ops from the supplied Connection,
-// responding to them as appropriate.
-type Server func(*Connection)
+// A type that knows how to serve ops read from a connection.
+type Server interface {
+	// Read and serve ops from the supplied connection until EOF.
+	ServeOps(*Connection)
+}
 
 // A struct representing the status of a mount operation, with a method that
 // waits for unmounting.
@@ -130,7 +132,7 @@ func Mount(
 
 	// Serve the connection in the background. When done, set the join status.
 	go func() {
-		server(connection)
+		server.ServeOps(connection)
 		mfs.joinStatus = connection.close()
 		close(mfs.joinStatusAvailable)
 	}()

samples/hellofs/hello_fs.go

@@ -33,11 +33,10 @@ import (
 //
 // Each file contains the string "Hello, world!".
 func NewHelloFS(clock timeutil.Clock) (server fuse.Server, err error) {
-	fs := &helloFS{
+	server = &helloFS{
 		Clock: clock,
 	}
 
-	server = fuse.Server(fs.serve)
 	return
 }
 
@@ -45,7 +44,7 @@ type helloFS struct {
 	Clock timeutil.Clock
 }
 
-func (fs *helloFS) serve(c *fuse.Connection) {
+func (fs *helloFS) ServeOps(c *fuse.Connection) {
 	for {
 		op, err := c.ReadOp()
 		if err == io.EOF {