[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>

1 files changed, 14 insertions, 0 deletions

diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index 36a6c2b79889..14f0b336519f 100644
--- 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