broken checkpt

overlay/tio/tio.go

@@ -46,42 +46,6 @@ type Queue interface {
 	Capabilities() Capabilities
 }
 
-
-// GSOInfo describes a kernel-supplied superpacket sitting in Packet.Bytes.
-// The zero value means "not a superpacket" — Bytes is one regular IP
-// datagram and no segmentation is required.
-type GSOInfo struct {
-	// Size is the GSO segment size: max payload bytes per segment
-	// (== TCP MSS for TSO, == UDP payload chunk for USO). Zero means
-	// not a superpacket.
-	Size uint16
-	// HdrLen is the total L3+L4 header length within Bytes (already
-	// corrected via correctHdrLen, so safe to slice on).
-	HdrLen uint16
-	// CsumStart is the L4 header offset inside Bytes (== L3 header
-	// length).
-	CsumStart uint16
-	// Proto picks the L4 protocol (TCP or UDP) so the segmenter knows
-	// which checksum/header layout to apply.
-	Proto GSOProto
-}
-
-// IsSuperpacket reports whether g describes a multi-segment GSO/USO
-// superpacket that needs segmentation before its bytes can be encrypted
-// and sent on the wire.
-func (g GSOInfo) IsSuperpacket() bool { return g.Size > 0 }
-
-// GSOProto selects the L4 protocol for a GSO superpacket. Determines which
-// VIRTIO_NET_HDR_GSO_* type the writer stamps and which checksum offset
-// inside the transport header virtio NEEDS_CSUM expects.
-type GSOProto uint8
-
-const (
-	GSOProtoNone GSOProto = iota
-	GSOProtoTCP
-	GSOProtoUDP
-)
-
 // GSOWriter is implemented by Queues that can emit a TCP or UDP superpacket
 // assembled from a header prefix plus one or more borrowed payload
 // fragments, in a single vectored write (writev with a leading
@@ -104,24 +68,25 @@ const (
 // implementation of GSOWriter is necessary but not sufficient since USO
 // may not have been negotiated even when TSO was.
 type GSOWriter interface {
-	WriteGSO(hdr []byte, transportHdr []byte, pays [][]byte, proto GSOProto) error
+	WriteGSO(hdr []byte, transportHdr []byte, pays [][]byte, proto wire.GSOProto) error
 }
 
 // SupportsGSO reports whether w implements GSOWriter and the underlying
 // queue advertises the negotiated capability for `want`. A writer that
 // implements GSOWriter but not CapsProvider is treated as permissive
 // (used by tests and fakes that don't negotiate).
-func SupportsGSO(w Queue, want GSOProto) (GSOWriter, bool) {
+func SupportsGSO(w Queue, want wire.GSOProto) (GSOWriter, bool) {
 	gw, ok := w.(GSOWriter)
 	if !ok {
 		return nil, false
 	}
 	caps := w.Capabilities()
 	switch want {
-	case GSOProtoTCP:
+	case wire.GSOProtoTCP:
 		return gw, caps.TSO
-	case GSOProtoUDP:
+	case wire.GSOProtoUDP:
 		return gw, caps.USO
+	default:
+		return gw, false
 	}
-	return gw, false
 }