datapath: Add support for RHEL-7 / CentOS-7 kernel.

[cascardo/ovs.git] / datapath / linux / compat / include / net / gre.h

diff --git a/datapath/linux/compat/include/net/gre.h b/datapath/linux/compat/include/net/gre.h
index 5b17dcc..f091b32 100644 (file)
--- a/datapath/linux/compat/include/net/gre.h
+++ b/datapath/linux/compat/include/net/gre.h
@@ -4,22 +4,29 @@
 #include <linux/skbuff.h>
 #include <net/ip_tunnels.h>
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)
+#include <linux/version.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) || \
+   defined(HAVE_GRE_CISCO_REGISTER)
 #include_next <net/gre.h>
+#endif
 
-#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37) */
+#ifndef HAVE_GRE_CISCO_REGISTER
 
-#define GREPROTO_CISCO         0
-#define GREPROTO_MAX           2
+/* GRE demux not available, implement our own demux. */
+#define MAX_GRE_PROTO_PRIORITY 255
 
-struct gre_protocol {
-       int  (*handler)(struct sk_buff *skb);
+struct gre_cisco_protocol {
+       int (*handler)(struct sk_buff *skb, const struct tnl_ptk_info *tpi);
+       int (*err_handler)(struct sk_buff *skb, u32 info,
+                          const struct tnl_ptk_info *tpi);
+       u8 priority;
 };
 
-int gre_add_protocol(const struct gre_protocol *proto, u8 version);
-int gre_del_protocol(const struct gre_protocol *proto, u8 version);
+#define gre_cisco_register rpl_gre_cisco_register
+int gre_cisco_register(struct gre_cisco_protocol *proto);
 
-#endif
+#define gre_cisco_unregister rpl_gre_cisco_unregister
+int gre_cisco_unregister(struct gre_cisco_protocol *proto);
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0)
 struct gre_base_hdr {
@@ -72,20 +79,9 @@ static inline __be16 tnl_flags_to_gre_flags(__be16 tflags)
        return flags;
 }
 #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0) */
+#endif /* HAVE_GRE_CISCO_REGISTER */
 
-#define MAX_GRE_PROTO_PRIORITY 255
-#define gre_cisco_protocol rpl_gre_cisco_protocol
-
-struct gre_cisco_protocol {
-       int (*handler)(struct sk_buff *skb, const struct tnl_ptk_info *tpi);
-       u8 priority;
-};
-
-#define gre_cisco_register rpl_gre_cisco_register
-int gre_cisco_register(struct gre_cisco_protocol *proto);
-
-#define gre_cisco_unregister rpl_gre_cisco_unregister
-int gre_cisco_unregister(struct gre_cisco_protocol *proto);
+#ifndef GRE_USE_KERNEL_GRE_HANDLE_OFFLOADS
 
 #define gre_build_header rpl_gre_build_header
 void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi,
@@ -107,6 +103,17 @@ static inline int ip_gre_calc_hlen(__be16 o_flags)
                addend += 4;
        return addend;
 }
-
+#else
+static inline struct sk_buff *rpl_gre_handle_offloads(struct sk_buff *skb,
+                                                 bool gre_csum)
+{
+       if (skb->encapsulation && skb_is_gso(skb)) {
+               kfree_skb(skb);
+               return ERR_PTR(-ENOSYS);
+       }
+       return gre_handle_offloads(skb, gre_csum);
+}
+#define gre_handle_offloads rpl_gre_handle_offloads
+#endif
 
 #endif