fuse: minimal handling of opInterrupt

Change-Id: Idd00f531fdc63d894a41103f2c25e418c397bad5

third_party/code.google.com/p/rsc/fuse/fuse.go

@@ -708,7 +708,15 @@ func (c *Conn) ReadRequest() (Request, error) {
 		}
 
 	case opInterrupt:
-		panic("opInterrupt")
+		in := (*interruptIn)(m.data())
+		if m.len() < unsafe.Sizeof(*in) {
+			goto corrupt
+		}
+		req = &InterruptRequest{
+			Header: m.Header(),
+			Unique: in.Unique,
+		}
+
 	case opBmap:
 		panic("opBmap")
 
@@ -1612,6 +1620,11 @@ func (r *FsyncRequest) Respond() {
 	r.Conn.respond(out, unsafe.Sizeof(*out))
 }
 
+type InterruptRequest struct {
+	Header
+	Unique uint64
+}
+
 /*{
 
 // A XXXRequest xxx.