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xfrm: remove eth_proto value from xfrm_state_afinfo

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xfrm_prepare_input needs to lookup the state afinfo backend again to fetch
the address family ethernet protocol value.

There are only two address families, so a switch statement is simpler.
While at it, use u8 for family and proto and remove the owner member --
its not used anywhere.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Florian Westphal
2019-05-03 17:46:18 +02:00
committed by Steffen Klassert
parent 3aaf3915a3
commit 4c203b0454
4 changed files with 14 additions and 20 deletions
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24
net/xfrm/xfrm_input.c
View File

@@ -359,28 +359,28 @@ static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
afinfo = xfrm_state_afinfo_get_rcu(x->outer_mode.family);
if (likely(afinfo))
err = afinfo->extract_input(x, skb);
rcu_read_unlock();
if (err) {
rcu_read_unlock();
if (err)
return err;
}
if (x->sel.family == AF_UNSPEC) {
inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
if (!inner_mode) {
rcu_read_unlock();
if (!inner_mode)
return -EAFNOSUPPORT;
}
}
afinfo = xfrm_state_afinfo_get_rcu(inner_mode->family);
if (unlikely(!afinfo)) {
rcu_read_unlock();
return -EAFNOSUPPORT;
switch (inner_mode->family) {
case AF_INET:
skb->protocol = htons(ETH_P_IP);
break;
case AF_INET6:
skb->protocol = htons(ETH_P_IPV6);
default:
WARN_ON_ONCE(1);
break;
}
skb->protocol = afinfo->eth_proto;
rcu_read_unlock();
return xfrm_inner_mode_encap_remove(x, inner_mode, skb);
}