From bb2d16182b7723679b4bbff1aae1952b87d967ee Mon Sep 17 00:00:00 2001
From: jan <jan@openbsd.org>
Date: Fri, 27 Oct 2023 20:56:47 +0000
Subject: [PATCH] Forward TCP LRO disabling to parent devices.

Also disable TCP LRO on bridged vlan(4) and default for bpe(4), nvgre(4) and
vxlan(4).

ok bluhm@
---
 sys/net/if.c       | 13 ++++++++++++-
 sys/net/if_bpe.c   |  4 +++-
 sys/net/if_gre.c   |  4 +++-
 sys/net/if_vlan.c  |  5 ++++-
 sys/net/if_vxlan.c |  4 +++-
 5 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/sys/net/if.c b/sys/net/if.c
index 94ebb42744a..351a600e8ba 100644
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if.c,v 1.708 2023/09/16 09:33:27 mpi Exp $	*/
+/*	$OpenBSD: if.c,v 1.709 2023/10/27 20:56:47 jan Exp $	*/
 /*	$NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $	*/
 
 /*
@@ -3243,6 +3243,17 @@ ifsetlro(struct ifnet *ifp, int on)
 	struct ifreq ifrq;
 	int error = 0;
 	int s = splnet();
+	struct if_parent parent;
+
+	memset(&parent, 0, sizeof(parent));
+	if ((*ifp->if_ioctl)(ifp, SIOCGIFPARENT, (caddr_t)&parent) != -1) {
+		struct ifnet *ifp0 = if_unit(parent.ifp_parent);
+
+		if (ifp0 != NULL) {
+			ifsetlro(ifp0, on);
+			if_put(ifp0);
+		}
+	}
 
 	if (!ISSET(ifp->if_capabilities, IFCAP_LRO)) {
 		error = ENOTSUP;
diff --git a/sys/net/if_bpe.c b/sys/net/if_bpe.c
index def3c124b67..ec3c758f7f4 100644
--- a/sys/net/if_bpe.c
+++ b/sys/net/if_bpe.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_bpe.c,v 1.19 2021/11/08 04:54:44 dlg Exp $ */
+/*	$OpenBSD: if_bpe.c,v 1.20 2023/10/27 20:56:47 jan Exp $ */
 /*
  * Copyright (c) 2018 David Gwynne <dlg@openbsd.org>
  *
@@ -631,6 +631,8 @@ bpe_set_parent(struct bpe_softc *sc, const struct if_parent *p)
 		goto put;
 	}
 
+	ifsetlro(ifp0, 0);
+
 	/* commit */
 	sc->sc_key.k_if = ifp0->if_index;
 	etherbridge_flush(&sc->sc_eb, IFBF_FLUSHALL);
diff --git a/sys/net/if_gre.c b/sys/net/if_gre.c
index cac48bb8f3d..6204ed40a74 100644
--- a/sys/net/if_gre.c
+++ b/sys/net/if_gre.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_gre.c,v 1.174 2023/05/13 13:35:17 bluhm Exp $ */
+/*	$OpenBSD: if_gre.c,v 1.175 2023/10/27 20:56:47 jan Exp $ */
 /*	$NetBSD: if_gre.c,v 1.9 1999/10/25 19:18:11 drochner Exp $ */
 
 /*
@@ -3544,6 +3544,8 @@ nvgre_set_parent(struct nvgre_softc *sc, const char *parent)
 		return (EPROTONOSUPPORT);
 	}
 
+	ifsetlro(ifp0, 0);
+
 	/* commit */
 	sc->sc_ifp0 = ifp0->if_index;
 	if_put(ifp0);
diff --git a/sys/net/if_vlan.c b/sys/net/if_vlan.c
index d660232deb4..efcdac41f33 100644
--- a/sys/net/if_vlan.c
+++ b/sys/net/if_vlan.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_vlan.c,v 1.215 2023/05/16 14:32:54 jan Exp $	*/
+/*	$OpenBSD: if_vlan.c,v 1.216 2023/10/27 20:56:47 jan Exp $	*/
 
 /*
  * Copyright 1998 Massachusetts Institute of Technology
@@ -937,6 +937,9 @@ vlan_set_parent(struct vlan_softc *sc, const char *parent)
 	if (error != 0)
 		goto put;
 
+	if (ether_brport_isset(ifp))
+		ifsetlro(ifp0, 0);
+
 	/* commit */
 	sc->sc_ifidx0 = ifp0->if_index;
 	if (!ISSET(sc->sc_flags, IFVF_LLADDR))
diff --git a/sys/net/if_vxlan.c b/sys/net/if_vxlan.c
index 37311eb90b2..156d1cba553 100644
--- a/sys/net/if_vxlan.c
+++ b/sys/net/if_vxlan.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_vxlan.c,v 1.93 2023/08/03 09:49:08 mvs Exp $ */
+/*	$OpenBSD: if_vxlan.c,v 1.94 2023/10/27 20:56:48 jan Exp $ */
 
 /*
  * Copyright (c) 2021 David Gwynne <dlg@openbsd.org>
@@ -1582,6 +1582,8 @@ vxlan_set_parent(struct vxlan_softc *sc, const struct if_parent *p)
 		goto put;
 	}
 
+	ifsetlro(ifp0, 0);
+
 	/* commit */
 	sc->sc_if_index0 = ifp0->if_index;
 	etherbridge_flush(&sc->sc_eb, IFBF_FLUSHALL);
-- 
2.20.1