ipvlan: drop ipv6 dependency
IPVlan has an hard dependency on IPv6, refactor the ipvlan code to allow
compiling it with IPv6 disabled, move duplicate code into addr_equal()
and refactor series of if-else into a switch.
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index 2469df1..67c91ce 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -22,12 +22,14 @@ static const struct nf_hook_ops ipvl_nfops[] = {
.hooknum = NF_INET_LOCAL_IN,
.priority = INT_MAX,
},
+#if IS_ENABLED(CONFIG_IPV6)
{
.hook = ipvlan_nf_input,
.pf = NFPROTO_IPV6,
.hooknum = NF_INET_LOCAL_IN,
.priority = INT_MAX,
},
+#endif
};
static const struct l3mdev_ops ipvl_l3mdev_ops = {
@@ -800,12 +802,14 @@ static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
return -ENOMEM;
addr->master = ipvlan;
- if (is_v6) {
- memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr));
- addr->atype = IPVL_IPV6;
- } else {
+ if (!is_v6) {
memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr));
addr->atype = IPVL_IPV4;
+#if IS_ENABLED(CONFIG_IPV6)
+ } else {
+ memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr));
+ addr->atype = IPVL_IPV6;
+#endif
}
list_add_tail(&addr->anode, &ipvlan->addrs);
@@ -833,6 +837,20 @@ static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
return;
}
+static bool ipvlan_is_valid_dev(const struct net_device *dev)
+{
+ struct ipvl_dev *ipvlan = netdev_priv(dev);
+
+ if (!netif_is_ipvlan(dev))
+ return false;
+
+ if (!ipvlan || !ipvlan->port)
+ return false;
+
+ return true;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
{
if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
@@ -850,19 +868,6 @@ static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
return ipvlan_del_addr(ipvlan, ip6_addr, true);
}
-static bool ipvlan_is_valid_dev(const struct net_device *dev)
-{
- struct ipvl_dev *ipvlan = netdev_priv(dev);
-
- if (!netif_is_ipvlan(dev))
- return false;
-
- if (!ipvlan || !ipvlan->port)
- return false;
-
- return true;
-}
-
static int ipvlan_addr6_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
@@ -913,6 +918,7 @@ static int ipvlan_addr6_validator_event(struct notifier_block *unused,
return NOTIFY_OK;
}
+#endif
static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
{
@@ -993,6 +999,7 @@ static struct notifier_block ipvlan_notifier_block __read_mostly = {
.notifier_call = ipvlan_device_event,
};
+#if IS_ENABLED(CONFIG_IPV6)
static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
.notifier_call = ipvlan_addr6_event,
};
@@ -1000,6 +1007,7 @@ static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = {
.notifier_call = ipvlan_addr6_validator_event,
};
+#endif
static void ipvlan_ns_exit(struct net *net)
{
@@ -1024,9 +1032,11 @@ static int __init ipvlan_init_module(void)
ipvlan_init_secret();
register_netdevice_notifier(&ipvlan_notifier_block);
+#if IS_ENABLED(CONFIG_IPV6)
register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
register_inet6addr_validator_notifier(
&ipvlan_addr6_vtor_notifier_block);
+#endif
register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block);
@@ -1045,9 +1055,11 @@ static int __init ipvlan_init_module(void)
unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
unregister_inetaddr_validator_notifier(
&ipvlan_addr4_vtor_notifier_block);
+#if IS_ENABLED(CONFIG_IPV6)
unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
unregister_inet6addr_validator_notifier(
&ipvlan_addr6_vtor_notifier_block);
+#endif
unregister_netdevice_notifier(&ipvlan_notifier_block);
return err;
}
@@ -1060,9 +1072,11 @@ static void __exit ipvlan_cleanup_module(void)
unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
unregister_inetaddr_validator_notifier(
&ipvlan_addr4_vtor_notifier_block);
+#if IS_ENABLED(CONFIG_IPV6)
unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
unregister_inet6addr_validator_notifier(
&ipvlan_addr6_vtor_notifier_block);
+#endif
}
module_init(ipvlan_init_module);