net: Abstract default ADVMSS behind an accessor.

[mv-sheeva.git] / include / net / dst.h

diff --git a/include/net/dst.h b/include/net/dst.h
index 9208b500aaafb8e93f3e60e4cdf5ea4bb9475b8b..03a1c3d52d808c06f9349405c30f85663bcaf313 100644 (file)
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -112,14 +112,20 @@ dst_metric_raw(const struct dst_entry *dst, const int metric)
 static inline u32
 dst_metric(const struct dst_entry *dst, const int metric)
 {
-       WARN_ON_ONCE(metric == RTAX_HOPLIMIT);
+       WARN_ON_ONCE(metric == RTAX_HOPLIMIT ||
+                    metric == RTAX_ADVMSS);
        return dst_metric_raw(dst, metric);
 }
 
 static inline u32
-dst_metric_hoplimit(const struct dst_entry *dst)
+dst_metric_advmss(const struct dst_entry *dst)
 {
-       return dst_metric_raw(dst, RTAX_HOPLIMIT);
+       u32 advmss = dst_metric_raw(dst, RTAX_ADVMSS);
+
+       if (!advmss)
+               advmss = dst->ops->default_advmss(dst);
+
+       return advmss;
 }
 
 static inline void dst_metric_set(struct dst_entry *dst, int metric, u32 val)