[XFRM] POLICY: Add Kconfig to support sub policy.

Add Kconfig to support sub policy.

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>

1 files changed, 10 insertions, 0 deletions

diff --git a/net/xfrm/Kconfig b/net/xfrm/Kconfig
index 43228f7fd3a0..0faab6332586 100644
--- a/net/xfrm/Kconfig
+++ b/net/xfrm/Kconfig
@@ -14,6 +14,16 @@ config XFRM_USER
 
           If unsure, say Y.
 
+config XFRM_SUB_POLICY
+        bool "Transformation sub policy support (EXPERIMENTAL)"
+        depends on XFRM && EXPERIMENTAL
+        ---help---
+          Support sub policy for developers. By using sub policy with main
+          one, two policies can be applied to the same packet at once.
+          Policy which lives shorter time in kernel should be a sub.
+
+          If unsure, say N.
+
 config NET_KEY
         tristate "PF_KEY sockets"
         select XFRM