5 files changed, 1 insertions, 78 deletions
diff --git a/pkg/tcpip/link/tun/tun_endpoint_refs.go b/pkg/tcpip/link/tun/tun_endpoint_refs.go
index 06d11f0e1..9a38142f5 100644
--- a/pkg/tcpip/link/tun/tun_endpoint_refs.go
+++ b/pkg/tcpip/link/tun/tun_endpoint_refs.go
@@ -1,12 +1,11 @@
 package tun
 
 import (
-	"sync/atomic"
-
 	"fmt"
 	"gvisor.dev/gvisor/pkg/log"
 	refs_vfs1 "gvisor.dev/gvisor/pkg/refs"
 	"runtime"
+	"sync/atomic"
 )
 
 // ownerType is used to customize logging. Note that we use a pointer to T so
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 47a8d7c86..b113d8613 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -1074,19 +1074,6 @@ const (
 	TCPTimeWaitReuseLoopbackOnly
 )
 
-// LingerOption is used by SetSockOpt/GetSockOpt to set/get the
-// duration for which a socket lingers before returning from Close.
-//
-// +stateify savable
-type LingerOption struct {
-	Enabled bool
-	Timeout time.Duration
-}
-
-func (*LingerOption) isGettableSocketOption() {}
-
-func (*LingerOption) isSettableSocketOption() {}
-
 // IPPacketInfo is the message structure for IP_PKTINFO.
 //
 // +stateify savable
diff --git a/pkg/tcpip/tcpip_state_autogen.go b/pkg/tcpip/tcpip_state_autogen.go
index 034b39c1f..827b27692 100644
--- a/pkg/tcpip/tcpip_state_autogen.go
+++ b/pkg/tcpip/tcpip_state_autogen.go
@@ -111,32 +111,6 @@ func (x *LinkPacketInfo) StateLoad(m state.Source) {
 	m.Load(1, &x.PktType)
 }
 
-func (x *LingerOption) StateTypeName() string {
-	return "pkg/tcpip.LingerOption"
-}
-
-func (x *LingerOption) StateFields() []string {
-	return []string{
-		"Enabled",
-		"Timeout",
-	}
-}
-
-func (x *LingerOption) beforeSave() {}
-
-func (x *LingerOption) StateSave(m state.Sink) {
-	x.beforeSave()
-	m.Save(0, &x.Enabled)
-	m.Save(1, &x.Timeout)
-}
-
-func (x *LingerOption) afterLoad() {}
-
-func (x *LingerOption) StateLoad(m state.Source) {
-	m.Load(0, &x.Enabled)
-	m.Load(1, &x.Timeout)
-}
-
 func (x *IPPacketInfo) StateTypeName() string {
 	return "pkg/tcpip.IPPacketInfo"
 }
@@ -170,6 +144,5 @@ func init() {
 	state.Register((*FullAddress)(nil))
 	state.Register((*ControlMessages)(nil))
 	state.Register((*LinkPacketInfo)(nil))
-	state.Register((*LingerOption)(nil))
 	state.Register((*IPPacketInfo)(nil))
 }
diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go
index c5d9eba5d..3f18efeef 100644
--- a/pkg/tcpip/transport/tcp/endpoint.go
+++ b/pkg/tcpip/transport/tcp/endpoint.go
@@ -654,9 +654,6 @@ type endpoint struct {
 
 	// owner is used to get uid and gid of the packet.
 	owner tcpip.PacketOwner
-
-	// linger is used for SO_LINGER socket option.
-	linger tcpip.LingerOption
 }
 
 // UniqueID implements stack.TransportEndpoint.UniqueID.
@@ -1010,26 +1007,6 @@ func (e *endpoint) Close() {
 		return
 	}
 
-	if e.linger.Enabled && e.linger.Timeout == 0 {
-		s := e.EndpointState()
-		isResetState := s == StateEstablished || s == StateCloseWait || s == StateFinWait1 || s == StateFinWait2 || s == StateSynRecv
-		if isResetState {
-			// Close the endpoint without doing full shutdown and
-			// send a RST.
-			e.resetConnectionLocked(tcpip.ErrConnectionAborted)
-			e.closeNoShutdownLocked()
-
-			// Wake up worker to close the endpoint.
-			switch s {
-			case StateSynRecv:
-				e.notifyProtocolGoroutine(notifyClose)
-			default:
-				e.notifyProtocolGoroutine(notifyTickleWorker)
-			}
-			return
-		}
-	}
-
 	// Issue a shutdown so that the peer knows we won't send any more data
 	// if we're connected, or stop accepting if we're listening.
 	e.shutdownLocked(tcpip.ShutdownWrite | tcpip.ShutdownRead)
@@ -1830,11 +1807,6 @@ func (e *endpoint) SetSockOpt(opt tcpip.SettableSocketOption) *tcpip.Error {
 	case *tcpip.SocketDetachFilterOption:
 		return nil
 
-	case *tcpip.LingerOption:
-		e.LockUser()
-		e.linger = *v
-		e.UnlockUser()
-
 	default:
 		return nil
 	}
@@ -2057,11 +2029,6 @@ func (e *endpoint) GetSockOpt(opt tcpip.GettableSocketOption) *tcpip.Error {
 			Port: port,
 		}
 
-	case *tcpip.LingerOption:
-		e.LockUser()
-		*o = e.linger
-		e.UnlockUser()
-
 	default:
 		return tcpip.ErrUnknownProtocolOption
 	}
diff --git a/pkg/tcpip/transport/tcp/tcp_state_autogen.go b/pkg/tcpip/transport/tcp/tcp_state_autogen.go
index 77e0d0e97..bed45e9a1 100644
--- a/pkg/tcpip/transport/tcp/tcp_state_autogen.go
+++ b/pkg/tcpip/transport/tcp/tcp_state_autogen.go
@@ -222,7 +222,6 @@ func (x *endpoint) StateFields() []string {
 		"closed",
 		"txHash",
 		"owner",
-		"linger",
 	}
 }
 
@@ -294,7 +293,6 @@ func (x *endpoint) StateSave(m state.Sink) {
 	m.Save(59, &x.closed)
 	m.Save(60, &x.txHash)
 	m.Save(61, &x.owner)
-	m.Save(62, &x.linger)
 }
 
 func (x *endpoint) StateLoad(m state.Source) {
@@ -356,7 +354,6 @@ func (x *endpoint) StateLoad(m state.Source) {
 	m.Load(59, &x.closed)
 	m.Load(60, &x.txHash)
 	m.Load(61, &x.owner)
-	m.Load(62, &x.linger)
 	m.LoadValue(3, new(string), func(y interface{}) { x.loadLastError(y.(string)) })
 	m.LoadValue(10, new(EndpointState), func(y interface{}) { x.loadState(y.(EndpointState)) })
 	m.LoadValue(25, new(unixTime), func(y interface{}) { x.loadRecentTSTime(y.(unixTime)) })