bridge: netlink: add support for netfilter tables config

Add support to allow getting/setting netfilter tables settings.
Currently these are IFLA_BR_NF_CALL_IPTABLES, IFLA_BR_NF_CALL_IP6TABLES
and IFLA_BR_NF_CALL_ARPTABLES.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index b8c88aa..0200bed 100644 (file)
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -259,6 +259,9 @@ enum {
        IFLA_BR_MCAST_QUERY_INTVL,
        IFLA_BR_MCAST_QUERY_RESPONSE_INTVL,
        IFLA_BR_MCAST_STARTUP_QUERY_INTVL,
+       IFLA_BR_NF_CALL_IPTABLES,
+       IFLA_BR_NF_CALL_IP6TABLES,
+       IFLA_BR_NF_CALL_ARPTABLES,
        __IFLA_BR_MAX,
 };
 

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 30def4f..fd37caf 100644 (file)
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -781,6 +781,9 @@ static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
        [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
        [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
        [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
+       [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
+       [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
+       [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
 };
 
 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
@@ -970,6 +973,25 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
                br->multicast_startup_query_interval = clock_t_to_jiffies(val);
        }
 #endif
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+       if (data[IFLA_BR_NF_CALL_IPTABLES]) {
+               u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
+
+               br->nf_call_iptables = val ? true : false;
+       }
+
+       if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
+               u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
+
+               br->nf_call_ip6tables = val ? true : false;
+       }
+
+       if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
+               u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
+
+               br->nf_call_arptables = val ? true : false;
+       }
+#endif
 
        return 0;
 }
@@ -1013,6 +1035,11 @@ static size_t br_get_size(const struct net_device *brdev)
               nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_INTVL */
               nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
               nla_total_size(sizeof(u64)) +    /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
+#endif
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+              nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IPTABLES */
+              nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_IP6TABLES */
+              nla_total_size(sizeof(u8)) +     /* IFLA_BR_NF_CALL_ARPTABLES */
 #endif
               0;
 }
@@ -1070,7 +1097,6 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
        if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto))
                return -EMSGSIZE;
 #endif
-
 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
        if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
            nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
@@ -1105,6 +1131,15 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
        if (nla_put_u64(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval))
                return -EMSGSIZE;
 #endif
+#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
+       if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
+                      br->nf_call_iptables ? 1 : 0) ||
+           nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
+                      br->nf_call_ip6tables ? 1 : 0) ||
+           nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
+                      br->nf_call_arptables ? 1 : 0))
+               return -EMSGSIZE;
+#endif
 
        return 0;
 }