kernel: enhance multicast routing support

Certain utilities, such as smcroute [1], require additional multicast
routing options to be enabled, otherwise they will not function
correctly. Enable these relevant dependancies when IPv4 and/or IPv6
multicast routing are enabled.

[1] https://github.com/troglobit/smcroute/blob/master/README.md#linux-requirements

This increases the uncompressed kernel size on MIPS 24kc by 8KBytes
and the compressed kernel size by 1.8KBytes.

Signed-off-by: Matthew Hagan <mnhagan88@gmail.com>

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index 07d65bc465c5ef7063372e49955968fb96d64ee2..98dab9b6fd539656548edb053b72d8f60646c01c 100644 (file)
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -986,6 +986,19 @@ config KERNEL_IP_MROUTE
          Multicast routing requires a multicast routing daemon in
          addition to kernel support.
 
+if KERNEL_IP_MROUTE
+
+       config KERNEL_IP_MROUTE_MULTIPLE_TABLES
+               def_bool y
+
+       config KERNEL_IP_PIMSM_V1
+               def_bool y
+
+       config KERNEL_IP_PIMSM_V2
+               def_bool y
+
+endif
+
 #
 # IPv6 configuration
 #
@@ -1008,8 +1021,15 @@ if KERNEL_IPV6
                  Multicast routing requires a multicast routing daemon in
                  addition to kernel support.
 
-       config KERNEL_IPV6_PIMSM_V2
-               def_bool n
+       if KERNEL_IPV6_MROUTE
+
+               config KERNEL_IPV6_MROUTE_MULTIPLE_TABLES
+                       def_bool y
+
+               config KERNEL_IPV6_PIMSM_V2
+                       def_bool y
+
+       endif
 
        config KERNEL_IPV6_SEG6_LWTUNNEL
                bool "Enable support for lightweight tunnels"