xfrm: policy: remove family field
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>
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a2817d8b27
@ -280,7 +280,6 @@ struct net_device;
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struct xfrm_type;
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struct xfrm_dst;
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struct xfrm_policy_afinfo {
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unsigned short family;
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struct dst_ops *dst_ops;
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struct dst_entry *(*dst_lookup)(struct net *net,
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int tos, int oif,
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@ -302,8 +301,8 @@ struct xfrm_policy_afinfo {
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struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
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};
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int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
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void xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
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int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
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void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
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void km_policy_notify(struct xfrm_policy *xp, int dir,
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const struct km_event *c);
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void km_state_notify(struct xfrm_state *x, const struct km_event *c);
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@ -17,8 +17,6 @@
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#include <net/ip.h>
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#include <net/l3mdev.h>
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static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
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static struct dst_entry *__xfrm4_dst_lookup(struct net *net, struct flowi4 *fl4,
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int tos, int oif,
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const xfrm_address_t *saddr,
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@ -272,7 +270,6 @@ static struct dst_ops xfrm4_dst_ops_template = {
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};
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static struct xfrm_policy_afinfo xfrm4_policy_afinfo = {
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.family = AF_INET,
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.dst_ops = &xfrm4_dst_ops_template,
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.dst_lookup = xfrm4_dst_lookup,
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.get_saddr = xfrm4_get_saddr,
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@ -376,7 +373,7 @@ static struct pernet_operations __net_initdata xfrm4_net_ops = {
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static void __init xfrm4_policy_init(void)
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{
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xfrm_policy_register_afinfo(&xfrm4_policy_afinfo);
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xfrm_policy_register_afinfo(&xfrm4_policy_afinfo, AF_INET);
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}
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void __init xfrm4_init(void)
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@ -25,8 +25,6 @@
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#include <net/mip6.h>
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#endif
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static struct xfrm_policy_afinfo xfrm6_policy_afinfo;
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static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
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const xfrm_address_t *saddr,
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const xfrm_address_t *daddr)
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@ -292,7 +290,6 @@ static struct dst_ops xfrm6_dst_ops_template = {
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};
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static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
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.family = AF_INET6,
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.dst_ops = &xfrm6_dst_ops_template,
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.dst_lookup = xfrm6_dst_lookup,
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.get_saddr = xfrm6_get_saddr,
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@ -305,7 +302,7 @@ static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
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static int __init xfrm6_policy_init(void)
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{
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return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo);
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return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo, AF_INET6);
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}
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static void xfrm6_policy_fini(void)
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@ -45,7 +45,7 @@ struct xfrm_flo {
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};
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static DEFINE_SPINLOCK(xfrm_policy_afinfo_lock);
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static struct xfrm_policy_afinfo __rcu *xfrm_policy_afinfo[NPROTO]
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static struct xfrm_policy_afinfo __rcu *xfrm_policy_afinfo[AF_INET6 + 1]
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__read_mostly;
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static struct kmem_cache *xfrm_dst_cache __read_mostly;
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@ -103,11 +103,11 @@ bool xfrm_selector_match(const struct xfrm_selector *sel, const struct flowi *fl
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return false;
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}
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static struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family)
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static const struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family)
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{
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struct xfrm_policy_afinfo *afinfo;
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const struct xfrm_policy_afinfo *afinfo;
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if (unlikely(family >= NPROTO))
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if (unlikely(family >= ARRAY_SIZE(xfrm_policy_afinfo)))
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return NULL;
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rcu_read_lock();
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afinfo = rcu_dereference(xfrm_policy_afinfo[family]);
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@ -2848,15 +2848,15 @@ static struct neighbour *xfrm_neigh_lookup(const struct dst_entry *dst,
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return dst->path->ops->neigh_lookup(dst, skb, daddr);
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}
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int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
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int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family)
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{
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int err = 0;
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if (unlikely(afinfo == NULL))
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return -EINVAL;
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if (unlikely(afinfo->family >= NPROTO))
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if (WARN_ON(family >= ARRAY_SIZE(xfrm_policy_afinfo)))
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return -EAFNOSUPPORT;
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spin_lock(&xfrm_policy_afinfo_lock);
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if (unlikely(xfrm_policy_afinfo[afinfo->family] != NULL))
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if (unlikely(xfrm_policy_afinfo[family] != NULL))
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err = -EEXIST;
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else {
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struct dst_ops *dst_ops = afinfo->dst_ops;
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@ -2874,7 +2874,7 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
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dst_ops->link_failure = xfrm_link_failure;
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if (likely(dst_ops->neigh_lookup == NULL))
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dst_ops->neigh_lookup = xfrm_neigh_lookup;
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rcu_assign_pointer(xfrm_policy_afinfo[afinfo->family], afinfo);
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rcu_assign_pointer(xfrm_policy_afinfo[family], afinfo);
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}
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spin_unlock(&xfrm_policy_afinfo_lock);
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@ -2882,16 +2882,16 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
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}
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EXPORT_SYMBOL(xfrm_policy_register_afinfo);
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void xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo)
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void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo)
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{
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struct dst_ops *dst_ops = afinfo->dst_ops;
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int i;
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if (unlikely(afinfo->family >= NPROTO))
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return;
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if (likely(xfrm_policy_afinfo[afinfo->family] != afinfo)) {
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RCU_INIT_POINTER(xfrm_policy_afinfo[afinfo->family],
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NULL);
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for (i = 0; i < ARRAY_SIZE(xfrm_policy_afinfo); i++) {
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if (xfrm_policy_afinfo[i] != afinfo)
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continue;
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RCU_INIT_POINTER(xfrm_policy_afinfo[i], NULL);
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break;
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}
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synchronize_rcu();
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