X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=net%2Fmpls%2Finternal.h;fp=net%2Fmpls%2Finternal.h;h=bde52ce88c949e76083ec704ed010493b60d6466;hb=cf4b24f0024fc2e3fbc653a659356d224b5b9172;hp=d7757be39877e84530ebecfc18fbb7dab502f979;hpb=b4e04fc7357b6cef0856cb14b42306af1af990e5;p=cascardo%2Flinux.git

diff --git a/net/mpls/internal.h b/net/mpls/internal.h
index d7757be39877..bde52ce88c94 100644
--- a/net/mpls/internal.h
+++ b/net/mpls/internal.h
@@ -25,7 +25,8 @@ struct sk_buff;
 #define MAX_NEW_LABELS 2
 
 /* This maximum ha length copied from the definition of struct neighbour */
-#define MAX_VIA_ALEN (ALIGN(MAX_ADDR_LEN, sizeof(unsigned long)))
+#define VIA_ALEN_ALIGN sizeof(unsigned long)
+#define MAX_VIA_ALEN (ALIGN(MAX_ADDR_LEN, VIA_ALEN_ALIGN))
 
 enum mpls_payload_type {
 	MPT_UNSPEC, /* IPv4 or IPv6 */
@@ -44,14 +45,35 @@ struct mpls_nh { /* next hop label forwarding entry */
 	u8			nh_labels;
 	u8			nh_via_alen;
 	u8			nh_via_table;
-	u8			nh_via[MAX_VIA_ALEN];
 };
 
+/* The route, nexthops and vias are stored together in the same memory
+ * block:
+ *
+ * +----------------------+
+ * | mpls_route           |
+ * +----------------------+
+ * | mpls_nh 0            |
+ * +----------------------+
+ * | ...                  |
+ * +----------------------+
+ * | mpls_nh n-1          |
+ * +----------------------+
+ * | alignment padding    |
+ * +----------------------+
+ * | via[rt_max_alen] 0   |
+ * +----------------------+
+ * | ...                  |
+ * +----------------------+
+ * | via[rt_max_alen] n-1 |
+ * +----------------------+
+ */
 struct mpls_route { /* next hop label forwarding entry */
 	struct rcu_head		rt_rcu;
 	u8			rt_protocol;
 	u8			rt_payload_type;
-	int			rt_nhn;
+	u8			rt_max_alen;
+	unsigned int		rt_nhn;
 	struct mpls_nh		rt_nh[0];
 };