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Date: Wed, 21 Oct 2020 17:21:55 +0800 From: wenxu@...oud.cn To: netdev@...r.kernel.org Subject: [PATCH net] ip_tunnel: fix over-mtu packet send fail without TUNNEL_DONT_FRAGMENT flags From: wenxu <wenxu@...oud.cn> The TUNNEL_DONT_FRAGMENT flags specific the tunnel outer ip can do fragment or not in the md mode. Without the TUNNEL_DONT_FRAGMENT should always do fragment. So it should not care the frag_off in inner ip. Fixes: cfc7381b3002 ("ip_tunnel: add collect_md mode to IPIP tunnel") Signed-off-by: wenxu <wenxu@...oud.cn> --- net/ipv4/ip_tunnel.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index 8b04d1d..ee65c92 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -608,9 +608,6 @@ 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; -- 1.8.3.1
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