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xfrm: remove eth_proto value from xfrm_state_afinfo 

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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6
include/net/xfrm.h
View File

@ -346,10 +346,8 @@ void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
int __xfrm_state_delete(struct xfrm_state *x);
struct xfrm_state_afinfo {
unsigned int family;
unsigned int proto;
__be16 eth_proto;
struct module *owner;
u8 family;
u8 proto;
const struct xfrm_type *type_map[IPPROTO_MAX];
const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];

2
net/ipv4/xfrm4_state.c
View File

@ -34,8 +34,6 @@ int xfrm4_extract_header(struct sk_buff *skb)
static struct xfrm_state_afinfo xfrm4_state_afinfo = {
.family = AF_INET,
.proto = IPPROTO_IPIP,
.eth_proto = htons(ETH_P_IP),
.owner = THIS_MODULE,
.output = xfrm4_output,
.output_finish = xfrm4_output_finish,
.extract_input = xfrm4_extract_input,

2
net/ipv6/xfrm6_state.c
View File

@ -40,8 +40,6 @@ int xfrm6_extract_header(struct sk_buff *skb)
static struct xfrm_state_afinfo xfrm6_state_afinfo = {
.family = AF_INET6,
.proto = IPPROTO_IPV6,
.eth_proto = htons(ETH_P_IPV6),
.owner = THIS_MODULE,
.output = xfrm6_output,
.output_finish = xfrm6_output_finish,
.extract_input = xfrm6_extract_input,

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);
}