These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / net / mpls / internal.h

diff --git a/kernel/net/mpls/internal.h b/kernel/net/mpls/internal.h
index 8cabeb5..bde52ce 100644 (file)
--- a/kernel/net/mpls/internal.h
+++ b/kernel/net/mpls/internal.h
@@ -21,6 +21,76 @@ struct mpls_dev {
 
 struct sk_buff;
 
+#define LABEL_NOT_SPECIFIED (1 << 20)
+#define MAX_NEW_LABELS 2
+
+/* This maximum ha length copied from the definition of struct neighbour */
+#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 */
+       MPT_IPV4 = 4,
+       MPT_IPV6 = 6,
+
+       /* Other types not implemented:
+        *  - Pseudo-wire with or without control word (RFC4385)
+        *  - GAL (RFC5586)
+        */
+};
+
+struct mpls_nh { /* next hop label forwarding entry */
+       struct net_device __rcu *nh_dev;
+       u32                     nh_label[MAX_NEW_LABELS];
+       u8                      nh_labels;
+       u8                      nh_via_alen;
+       u8                      nh_via_table;
+};
+
+/* 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;
+       u8                      rt_max_alen;
+       unsigned int            rt_nhn;
+       struct mpls_nh          rt_nh[0];
+};
+
+#define for_nexthops(rt) {                                             \
+       int nhsel; struct mpls_nh *nh;                  \
+       for (nhsel = 0, nh = (rt)->rt_nh;                               \
+            nhsel < (rt)->rt_nhn;                                      \
+            nh++, nhsel++)
+
+#define change_nexthops(rt) {                                          \
+       int nhsel; struct mpls_nh *nh;                          \
+       for (nhsel = 0, nh = (struct mpls_nh *)((rt)->rt_nh);   \
+            nhsel < (rt)->rt_nhn;                                      \
+            nh++, nhsel++)
+
+#define endfor_nexthops(rt) }
+
 static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
 {
        return (struct mpls_shim_hdr *)skb_network_header(skb);
@@ -50,7 +120,14 @@ static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr *
        return result;
 }
 
-int nla_put_labels(struct sk_buff *skb, int attrtype,  u8 labels, const u32 label[]);
-int nla_get_labels(const struct nlattr *nla, u32 max_labels, u32 *labels, u32 label[]);
+int nla_put_labels(struct sk_buff *skb, int attrtype,  u8 labels,
+                  const u32 label[]);
+int nla_get_labels(const struct nlattr *nla, u32 max_labels, u8 *labels,
+                  u32 label[]);
+int nla_get_via(const struct nlattr *nla, u8 *via_alen, u8 *via_table,
+               u8 via[]);
+bool mpls_output_possible(const struct net_device *dev);
+unsigned int mpls_dev_mtu(const struct net_device *dev);
+bool mpls_pkt_too_big(const struct sk_buff *skb, unsigned int mtu);
 
 #endif /* MPLS_INTERNAL_H */