net: Abstract default ADVMSS behind an accessor.

[mv-sheeva.git] / net / xfrm / xfrm_policy.c

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 6e50ccd8c5325d31b16c912d0687a752b852c4d4..36936c8ae961dedd2c722f334f8da32512012f61 100644 (file)
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2361,6 +2361,11 @@ static int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *first,
        return 1;
 }
 
+static unsigned int xfrm_default_advmss(const struct dst_entry *dst)
+{
+       return dst_metric_advmss(dst->path);
+}
+
 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
 {
        struct net *net;
@@ -2378,6 +2383,8 @@ int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo)
                        dst_ops->kmem_cachep = xfrm_dst_cache;
                if (likely(dst_ops->check == NULL))
                        dst_ops->check = xfrm_dst_check;
+               if (likely(dst_ops->default_advmss == NULL))
+                       dst_ops->default_advmss = xfrm_default_advmss;
                if (likely(dst_ops->negative_advice == NULL))
                        dst_ops->negative_advice = xfrm_negative_advice;
                if (likely(dst_ops->link_failure == NULL))