net: sched: only keep the available bits when setting vxlan md->gbp
authorXin Long <lucien.xin@gmail.com>
Sun, 13 Sep 2020 11:51:50 +0000 (19:51 +0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 14 Sep 2020 23:49:39 +0000 (16:49 -0700)
commit13e6ce98aa65ab5ce19351c020419360dfe8af29
tree85f3cd4dd493f7ed32eceefe7b5c9755a81f8b70
parentff48b6222e65ebdba5a403ef1deba6214e749193
net: sched: only keep the available bits when setting vxlan md->gbp

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 we'd better do the mask when set it in act_tunnel_key and cls_flower.
Otherwise, when users don't know these bits, they may configure with a
value which can never be matched.

Reported-by: Shuang Li <shuali@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/vxlan.h
net/sched/act_tunnel_key.c
net/sched/cls_flower.c