From 857d9e9eded1ef26a373b66383617480965a78e0 Mon Sep 17 00:00:00 2001 From: Willem de Bruijn Date: Tue, 22 May 2018 11:34:40 -0400 Subject: [PATCH] gso: limit udp gso to egress-only virtual devices Until the udp receive stack supports large packets (UDP GRO), GSO packets must not loop from the egress to the ingress path. Revert the change that added NETIF_F_GSO_UDP_L4 to various virtual devices through NETIF_F_GSO_ENCAP_ALL as this included devices that may loop packets, such as veth and macvlan. Instead add it to specific devices that forward to another device's egress path, bonding and team. Fixes: 84ff00c25149 ("udp: add gso support to virtual devices") CC: Alexander Duyck Signed-off-by: Willem de Bruijn Signed-off-by: David S. Miller --- drivers/net/bonding/bond_main.c | 5 +++-- drivers/net/team/team.c | 5 +++-- include/linux/netdev_features.h | 1 - 3 files changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 06efdf6a762b5..fea17b92b1aed 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -1107,7 +1107,8 @@ static void bond_compute_features(struct bonding *bond) done: bond_dev->vlan_features = vlan_features; - bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL; + bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | + NETIF_F_GSO_UDP_L4; bond_dev->gso_max_segs = gso_max_segs; netif_set_gso_max_size(bond_dev, gso_max_size); @@ -4268,7 +4269,7 @@ void bond_setup(struct net_device *bond_dev) NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER; - bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; + bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4; bond_dev->features |= bond_dev->hw_features; } diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c index 9dbd390ace340..d6ff881165d07 100644 --- a/drivers/net/team/team.c +++ b/drivers/net/team/team.c @@ -1026,7 +1026,8 @@ static void __team_compute_features(struct team *team) } team->dev->vlan_features = vlan_features; - team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL; + team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL | + NETIF_F_GSO_UDP_L4; team->dev->hard_header_len = max_hard_header_len; team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; @@ -2117,7 +2118,7 @@ static void team_setup(struct net_device *dev) NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER; - dev->hw_features |= NETIF_F_GSO_ENCAP_ALL; + dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4; dev->features |= dev->hw_features; } diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h index c87c3a3453c19..623bb8ced0600 100644 --- a/include/linux/netdev_features.h +++ b/include/linux/netdev_features.h @@ -220,7 +220,6 @@ enum { NETIF_F_GSO_GRE_CSUM | \ NETIF_F_GSO_IPXIP4 | \ NETIF_F_GSO_IPXIP6 | \ - NETIF_F_GSO_UDP_L4 | \ NETIF_F_GSO_UDP_TUNNEL | \ NETIF_F_GSO_UDP_TUNNEL_CSUM) -- 2.39.5