3 files changed, 22 insertions, 17 deletions
diff --git a/pkg/tcpip/network/ipv4/ipv4.go b/pkg/tcpip/network/ipv4/ipv4.go
index 34d3f8474..1f6e14c3f 100644
--- a/pkg/tcpip/network/ipv4/ipv4.go
+++ b/pkg/tcpip/network/ipv4/ipv4.go
@@ -278,6 +278,7 @@ func (e *endpoint) writePacketFragments(r *stack.Route, gso *stack.GSO, mtu int,
 
 		// Send out the fragment.
 		if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, fragPkt); err != nil {
+			r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(n - i))
 			return err
 		}
 		r.Stats().IP.PacketsSent.Increment()
@@ -349,6 +350,7 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.Netw
 		return e.writePacketFragments(r, gso, int(e.linkEP.MTU()), pkt)
 	}
 	if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
+		r.Stats().IP.OutgoingPacketErrors.Increment()
 		return err
 	}
 	r.Stats().IP.PacketsSent.Increment()
@@ -379,6 +381,9 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
 		// faster WritePackets API directly.
 		n, err := e.linkEP.WritePackets(r, gso, pkts, ProtocolNumber)
 		r.Stats().IP.PacketsSent.IncrementBy(uint64(n))
+		if err != nil {
+			r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pkts.Len() - n))
+		}
 		return n, err
 	}
 	r.Stats().IP.IPTablesOutputDropped.IncrementBy(uint64(len(dropped)))
@@ -403,6 +408,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
 		}
 		if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
 			r.Stats().IP.PacketsSent.IncrementBy(uint64(n))
+			r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pkts.Len() - n - len(dropped)))
 			// Dropped packets aren't errors, so include them in
 			// the return value.
 			return n + len(dropped), err
@@ -461,9 +467,12 @@ func (e *endpoint) WriteHeaderIncludedPacket(r *stack.Route, pkt *stack.PacketBu
 		return nil
 	}
 
+	if err := e.linkEP.WritePacket(r, nil /* gso */, ProtocolNumber, pkt); err != nil {
+		r.Stats().IP.OutgoingPacketErrors.Increment()
+		return err
+	}
 	r.Stats().IP.PacketsSent.Increment()
-
-	return e.linkEP.WritePacket(r, nil /* gso */, ProtocolNumber, pkt)
+	return nil
 }
 
 // HandlePacket is called by the link layer when new ipv4 packets arrive for
diff --git a/pkg/tcpip/network/ipv6/ipv6.go b/pkg/tcpip/network/ipv6/ipv6.go
index 7458c3795..c8a3e0b34 100644
--- a/pkg/tcpip/network/ipv6/ipv6.go
+++ b/pkg/tcpip/network/ipv6/ipv6.go
@@ -424,6 +424,7 @@ func (e *endpoint) WritePacket(r *stack.Route, gso *stack.GSO, params stack.Netw
 	}
 
 	if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
+		r.Stats().IP.OutgoingPacketErrors.Increment()
 		return err
 	}
 	r.Stats().IP.PacketsSent.Increment()
@@ -453,6 +454,9 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
 		// faster WritePackets API directly.
 		n, err := e.linkEP.WritePackets(r, gso, pkts, ProtocolNumber)
 		r.Stats().IP.PacketsSent.IncrementBy(uint64(n))
+		if err != nil {
+			r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pkts.Len() - n))
+		}
 		return n, err
 	}
 	r.Stats().IP.IPTablesOutputDropped.IncrementBy(uint64(len(dropped)))
@@ -477,6 +481,7 @@ func (e *endpoint) WritePackets(r *stack.Route, gso *stack.GSO, pkts stack.Packe
 		}
 		if err := e.linkEP.WritePacket(r, gso, ProtocolNumber, pkt); err != nil {
 			r.Stats().IP.PacketsSent.IncrementBy(uint64(n))
+			r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(pkts.Len() - n + len(dropped)))
 			// Dropped packets aren't errors, so include them in
 			// the return value.
 			return n + len(dropped), err
diff --git a/pkg/tcpip/stack/route.go b/pkg/tcpip/stack/route.go
index 5ade3c832..effe30155 100644
--- a/pkg/tcpip/stack/route.go
+++ b/pkg/tcpip/stack/route.go
@@ -211,14 +211,13 @@ func (r *Route) WritePacket(gso *GSO, params NetworkHeaderParams, pkt *PacketBuf
 	// WritePacket takes ownership of pkt, calculate numBytes first.
 	numBytes := pkt.Size()
 
-	err := r.addressEndpoint.NetworkEndpoint().WritePacket(r, gso, params, pkt)
-	if err != nil {
-		r.Stats().IP.OutgoingPacketErrors.Increment()
-	} else {
-		r.nic.stats.Tx.Packets.Increment()
-		r.nic.stats.Tx.Bytes.IncrementBy(uint64(numBytes))
+	if err := r.addressEndpoint.NetworkEndpoint().WritePacket(r, gso, params, pkt); err != nil {
+		return err
 	}
-	return err
+
+	r.nic.stats.Tx.Packets.Increment()
+	r.nic.stats.Tx.Bytes.IncrementBy(uint64(numBytes))
+	return nil
 }
 
 // WritePackets writes a list of n packets through the given route and returns
@@ -228,15 +227,8 @@ func (r *Route) WritePackets(gso *GSO, pkts PacketBufferList, params NetworkHead
 		return 0, tcpip.ErrInvalidEndpointState
 	}
 
-	// WritePackets takes ownership of pkt, calculate length first.
-	numPkts := pkts.Len()
-
 	n, err := r.addressEndpoint.NetworkEndpoint().WritePackets(r, gso, pkts, params)
-	if err != nil {
-		r.Stats().IP.OutgoingPacketErrors.IncrementBy(uint64(numPkts - n))
-	}
 	r.nic.stats.Tx.Packets.IncrementBy(uint64(n))
-
 	writtenBytes := 0
 	for i, pb := 0, pkts.Front(); i < n && pb != nil; i, pb = i+1, pb.Next() {
 		writtenBytes += pb.Size()
@@ -257,7 +249,6 @@ func (r *Route) WriteHeaderIncludedPacket(pkt *PacketBuffer) *tcpip.Error {
 	numBytes := pkt.Data.Size()
 
 	if err := r.addressEndpoint.NetworkEndpoint().WriteHeaderIncludedPacket(r, pkt); err != nil {
-		r.Stats().IP.OutgoingPacketErrors.Increment()
 		return err
 	}
 	r.nic.stats.Tx.Packets.Increment()