[XFRM]: Add XFRM_MODE_xxx for future use.

Transformation mode is used as either IPsec transport or tunnel.
It is required to add two more items, route optimization and inbound trigger
for Mobile IPv6.
Based on MIPL2 kernel patch.

This patch was also written by: Ville Nuorvala <vnuorval@tcs.hut.fi>

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 5 insertions, 3 deletions

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 46a15c7a1a13..5154064b6d95 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -120,7 +120,9 @@ enum
 
 #define XFRM_MODE_TRANSPORT 0
 #define XFRM_MODE_TUNNEL 1
-#define XFRM_MODE_MAX 2
+#define XFRM_MODE_ROUTEOPTIMIZATION 2
+#define XFRM_MODE_IN_TRIGGER 3
+#define XFRM_MODE_MAX 4
 
 /* Netlink configuration messages.  */
 enum {
@@ -247,7 +249,7 @@ struct xfrm_usersa_info {
         __u32                           seq;
         __u32                           reqid;
         __u16                           family;
-        __u8                            mode; /* 0=transport,1=tunnel */
+        __u8                            mode;           /* XFRM_MODE_xxx */
         __u8                            replay_window;
         __u8                            flags;
 #define XFRM_STATE_NOECN        1
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 00bf86e6e82b..762795624b10 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -298,7 +298,7 @@ struct xfrm_tmpl
 
         __u32                   reqid;
 
-/* Mode: transport/tunnel */
+/* Mode: transport, tunnel etc. */
         __u8                    mode;
 
 /* Sharing mode: unique, this session only, this user only etc. */