[IPV6] KCONFIG: Add subtrees support.

This is for developers only.
Based on MIPL2 kernel patch.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Ville Nuorvala <vnuorval@tcs.hut.fi
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index 36a6c2b..14f0b33 100644 (file)
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -136,6 +136,20 @@ config IPV6_TUNNEL
 
          If unsure, say N.
 
+config IPV6_SUBTREES
+       bool "IPv6: source address based routing"
+       depends on IPV6 && EXPERIMENTAL
+       ---help---
+         Enable routing by source address or prefix.
+
+         The destination address is still the primary routing key, so mixing
+         normal and source prefix specific routes in the same routing table
+         may sometimes lead to unintended routing behavior.  This can be
+         avoided by defining different routing tables for the normal and
+         source prefix specific routes.
+
+         If unsure, say N.
+
 config IPV6_MULTIPLE_TABLES
        bool "IPv6: Multiple Routing Tables"
        depends on IPV6 && EXPERIMENTAL