[IPV4]: Primary and secondary addresses

Add an option to make secondary IP addresses get promoted
when primary IP addresses are removed from the device.
It defaults to off to preserve existing behavior.

Signed-off-by: Harald Welte <laforge@gnumonks.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 772998147e3e..23032d9d6071 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -399,6 +399,7 @@ enum
         NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
         NET_IPV4_CONF_ARP_ANNOUNCE=18,
         NET_IPV4_CONF_ARP_IGNORE=19,
+        NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
         __NET_IPV4_CONF_MAX
 };