diff mbox series

[net,2/2] lwtunnel: only keep the available bits when setting vxlan md->gbp

Message ID 1db5cfa6749c76f66c9bf2eeedff0e0fc84ce9d5.1599997873.git.lucien.xin@gmail.com
State New
Headers show
Series net: improve vxlan option process in net_sched and lwtunnel | expand

Commit Message

Xin Long Sept. 13, 2020, 11:51 a.m. UTC 
As we can see from vxlan_build/parse_gbp_hdr(), when processing metadata
on vxlan rx/tx path, only dont_learn/policy_applied/policy_id fields can
be set to or parse from the packet for vxlan gbp option.

So do the mask when set it in lwtunnel, as it does in act_tunnel_key and
cls_flower.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 net/ipv4/ip_tunnel_core.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 75c6013..b2ea1a8 100644
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -554,6 +554,7 @@  static int ip_tun_parse_opts_vxlan(struct nlattr *attr,
 
 		attr = tb[LWTUNNEL_IP_OPT_VXLAN_GBP];
 		md->gbp = nla_get_u32(attr);
+		md->gbp &= VXLAN_GBP_MASK;
 		info->key.tun_flags |= TUNNEL_VXLAN_OPT;
 	}