From 8e3c047f814bf1f28449893613b7f5ae5f7e9674 Mon Sep 17 00:00:00 2001 From: wenxu Date: Fri, 30 Oct 2020 11:32:08 +0800 Subject: ip_tunnel: fix over-mtu packet send fail without TUNNEL_DONT_FRAGMENT flags [ Upstream commit 20149e9eb68c003eaa09e7c9a49023df40779552 ] The tunnel device such as vxlan, bareudp and geneve in the lwt mode set the outer df only based TUNNEL_DONT_FRAGMENT. And this was also the behavior for gre device before switching to use ip_md_tunnel_xmit in commit 962924fa2b7a ("ip_gre: Refactor collect metatdata mode tunnel xmit to ip_md_tunnel_xmit") When the ip_gre in lwt mode xmit with ip_md_tunnel_xmi changed the rule and make the discrepancy between handling of DF by different tunnels. So in the ip_md_tunnel_xmit should follow the same rule like other tunnels. Fixes: cfc7381b3002 ("ip_tunnel: add collect_md mode to IPIP tunnel") Signed-off-by: wenxu Link: https://lore.kernel.org/r/1604028728-31100-1-git-send-email-wenxu@ucloud.cn Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- net/ipv4/ip_tunnel.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'net') diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index a0b4dc54f8a6..f61c5a0b502a 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -614,9 +614,6 @@ void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, ttl = ip4_dst_hoplimit(&rt->dst); } - if (!df && skb->protocol == htons(ETH_P_IP)) - df = inner_iph->frag_off & htons(IP_DF); - headroom += LL_RESERVED_SPACE(rt->dst.dev) + rt->dst.header_len; if (headroom > dev->needed_headroom) dev->needed_headroom = headroom; -- cgit v1.2.3