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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>
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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5
include/net/xfrm.h
View File

@ -280,7 +280,6 @@ struct net_device;
struct xfrm_type;
struct xfrm_dst;
struct xfrm_policy_afinfo {
unsigned short family;
struct dst_ops *dst_ops;
struct dst_entry *(*dst_lookup)(struct net *net,
int tos, int oif,
@ -302,8 +301,8 @@ struct xfrm_policy_afinfo {
struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
};
int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
void xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
void km_policy_notify(struct xfrm_policy *xp, int dir,
const struct km_event *c);
void km_state_notify(struct xfrm_state *x, const struct km_event *c);

5
net/ipv4/xfrm4_policy.c
View File

@ -17,8 +17,6 @@
#include <net/ip.h>
#include <net/l3mdev.h>
static struct xfrm_policy_afinfo xfrm4_policy_afinfo;
static struct dst_entry *__xfrm4_dst_lookup(struct net *net, struct flowi4 *fl4,
int tos, int oif,
const xfrm_address_t *saddr,
@ -272,7 +270,6 @@ static struct dst_ops xfrm4_dst_ops_template = {
};
static struct xfrm_policy_afinfo xfrm4_policy_afinfo = {
.family = AF_INET,
.dst_ops = &xfrm4_dst_ops_template,
.dst_lookup = xfrm4_dst_lookup,
.get_saddr = xfrm4_get_saddr,
@ -376,7 +373,7 @@ static struct pernet_operations __net_initdata xfrm4_net_ops = {
static void __init xfrm4_policy_init(void)
{
xfrm_policy_register_afinfo(&xfrm4_policy_afinfo);
xfrm_policy_register_afinfo(&xfrm4_policy_afinfo, AF_INET);
}
void __init xfrm4_init(void)

5
net/ipv6/xfrm6_policy.c
View File

@ -25,8 +25,6 @@
#include <net/mip6.h>
#endif
static struct xfrm_policy_afinfo xfrm6_policy_afinfo;
static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
const xfrm_address_t *saddr,
const xfrm_address_t *daddr)
@ -292,7 +290,6 @@ static struct dst_ops xfrm6_dst_ops_template = {
};
static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
.family = AF_INET6,
.dst_ops = &xfrm6_dst_ops_template,
.dst_lookup = xfrm6_dst_lookup,
.get_saddr = xfrm6_get_saddr,
@ -305,7 +302,7 @@ static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
static int __init xfrm6_policy_init(void)
{
return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo);
return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo, AF_INET6);
}
static void xfrm6_policy_fini(void)

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();