From 9d917c207d6b212eb5fb4d8ca31826e5b75b4d28 Mon Sep 17 00:00:00 2001 From: Vadim Fedorenko Date: Thu, 2 Nov 2017 15:49:08 +0300 Subject: add support of IFF_XMIT_DST_RELEASE bit in vlan Some time ago Eric Dumazet suggested a "hack the IFF_XMIT_DST_RELEASE flag on the vlan netdev". But the last comment was "does not support properly bonding/team.(If the real_dev->privflags IFF_XMIT_DST_RELEASE bit changes, we want to update all the vlans at the same time )" I've extended that patch to support changes of IFF_XMIT_DST_RELEASE in bonding/team. Both bonding and team call netdev_change_features() after recalculation of features including priv_flags IFF_XMIT_DST_RELEASE bit. So the only thing needed to support is to recheck this bit in vlan_transfer_features(). Suggested-by: Eric Dumazet Signed-off-by: Vadim Fedorenko Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller --- net/8021q/vlan.c | 3 +++ net/8021q/vlan_netlink.c | 1 + 2 files changed, 4 insertions(+) diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index 71c3e045505b..a0103500cc6d 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -328,6 +328,9 @@ static void vlan_transfer_features(struct net_device *dev, vlandev->fcoe_ddp_xid = dev->fcoe_ddp_xid; #endif + vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE; + vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE); + netdev_update_features(vlandev); } diff --git a/net/8021q/vlan_netlink.c b/net/8021q/vlan_netlink.c index 6e7c5a6a7930..6689c0b272a7 100644 --- a/net/8021q/vlan_netlink.c +++ b/net/8021q/vlan_netlink.c @@ -143,6 +143,7 @@ static int vlan_newlink(struct net *src_net, struct net_device *dev, vlan->vlan_proto = proto; vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]); vlan->real_dev = real_dev; + dev->priv_flags |= (real_dev->priv_flags & IFF_XMIT_DST_RELEASE); vlan->flags = VLAN_FLAG_REORDER_HDR; err = vlan_check_real_dev(real_dev, vlan->vlan_proto, vlan->vlan_id); -- cgit v1.2.3