From: Xin Long Date: Wed, 6 Nov 2019 09:01:04 +0000 (+0800) Subject: lwtunnel: add options process for cmp_encap X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0eb8eb2f96851e49d54c301aa3b0672706e6b171;p=openwrt%2Fstaging%2Fblogic.git lwtunnel: add options process for cmp_encap When comparing two tun_info, dst_cache member should have been skipped, as dst_cache is a per cpu pointer and they are always different values even in two tun_info with the same keys. So this patch is to skip dst_cache member and compare the key, mode and options_len only. For the future opts setting support, also to compare options. Fixes: 2d79849903e0 ("lwtunnel: ip tunnel: fix multiple routes with different encap") Signed-off-by: Xin Long Signed-off-by: David S. Miller --- diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index 10f08481b003..c0b5bad8e12a 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -315,8 +315,14 @@ static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) { - return memcmp(lwt_tun_info(a), lwt_tun_info(b), - sizeof(struct ip_tunnel_info)); + struct ip_tunnel_info *info_a = lwt_tun_info(a); + struct ip_tunnel_info *info_b = lwt_tun_info(b); + + return memcmp(info_a, info_b, sizeof(info_a->key)) || + info_a->mode != info_b->mode || + info_a->options_len != info_b->options_len || + memcmp(ip_tunnel_info_opts(info_a), + ip_tunnel_info_opts(info_b), info_a->options_len); } static const struct lwtunnel_encap_ops ip_tun_lwt_ops = {