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xfrm: policy: remove family field

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Only needed it to register the policy backend at init time.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Florian Westphal 2017-02-07 15:00:17 +01:00 • committed by Steffen Klassert
parent 3d7d25a68e
commit a2817d8b27
4 changed files with 21 additions and 28 deletions
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34
net/xfrm/xfrm_policy.c
View file

@ -45,7 +45,7 @@ struct xfrm_flo {
};
static DEFINE_SPINLOCK(xfrm_policy_afinfo_lock);
static struct xfrm_policy_afinfo __rcu *xfrm_policy_afinfo[NPROTO]
static struct xfrm_policy_afinfo __rcu *xfrm_policy_afinfo[AF_INET6 + 1]
__read_mostly;
static struct kmem_cache *xfrm_dst_cache __read_mostly;
@ -103,11 +103,11 @@ bool xfrm_selector_match(const struct xfrm_selector *sel, const struct flowi *fl
return false;
}
static struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family)
static const struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family)
{
struct xfrm_policy_afinfo *afinfo;
const struct xfrm_policy_afinfo *afinfo;
if (unlikely(family >= NPROTO))
if (unlikely(family >= ARRAY_SIZE(xfrm_policy_afinfo)))
return NULL;
rcu_read_lock();
afinfo = rcu_dereference(xfrm_policy_afinfo[family]);
@ -2848,15 +2848,15 @@ static struct neighbour *xfrm_neigh_lookup(const struct dst_entry *dst,
return dst->path->ops->neigh_lookup(dst, skb, daddr);
}
int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family)
{
int err = 0;
if (unlikely(afinfo == NULL))
return -EINVAL;
if (unlikely(afinfo->family >= NPROTO))
if (WARN_ON(family >= ARRAY_SIZE(xfrm_policy_afinfo)))
return -EAFNOSUPPORT;
spin_lock(&xfrm_policy_afinfo_lock);
if (unlikely(xfrm_policy_afinfo[afinfo->family] != NULL))
if (unlikely(xfrm_policy_afinfo[family] != NULL))
err = -EEXIST;
else {
struct dst_ops *dst_ops = afinfo->dst_ops;
@ -2874,7 +2874,7 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
dst_ops->link_failure = xfrm_link_failure;
if (likely(dst_ops->neigh_lookup == NULL))
dst_ops->neigh_lookup = xfrm_neigh_lookup;
rcu_assign_pointer(xfrm_policy_afinfo[afinfo->family], afinfo);
rcu_assign_pointer(xfrm_policy_afinfo[family], afinfo);
}
spin_unlock(&xfrm_policy_afinfo_lock);
@ -2882,16 +2882,16 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
}
EXPORT_SYMBOL(xfrm_policy_register_afinfo);
void xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo)
void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo)
{
struct dst_ops *dst_ops = afinfo->dst_ops;
int i;
if (unlikely(afinfo->family >= NPROTO))
return;
if (likely(xfrm_policy_afinfo[afinfo->family] != afinfo)) {
RCU_INIT_POINTER(xfrm_policy_afinfo[afinfo->family],
NULL);
for (i = 0; i < ARRAY_SIZE(xfrm_policy_afinfo); i++) {
if (xfrm_policy_afinfo[i] != afinfo)
continue;
RCU_INIT_POINTER(xfrm_policy_afinfo[i], NULL);
break;
}
synchronize_rcu();