[PATCH ipvs,v3 06/20] ipvs: prevent mixing heterogeneous pools and synchronization

[Alex Gartrell <agartrell@fb.com>]

The synchronization protocol is not compatible with heterogeneous pools, so
we need to verify that we're not turning both on at the same time.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
---
 net/netfilter/ipvs/ip_vs_ctl.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index beffb8f..c374ebb 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -3351,6 +3351,12 @@ static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
 	      attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
 		return -EINVAL;
 
+	/* The synchronization protocol is incompatible with mixed family
+	 * services
+	 */
+	if (net_ipvs(net)->mixed_address_family_dests > 0)
+		return -EINVAL;
+
 	return start_sync_thread(net,
 				 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
 				 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
-- 
1.8.1