[PATCH net-next 1/1] driver: ipvlan: Define common functions to decrease duplicated codes used to add or del IP address

From: Gao Feng <redacted>

There are some duplicated codes in ipvlan_add_addr6/4 and
ipvlan_del_addr6/4. Now define two common functions ipvlan_add_addr
and ipvlan_del_addr to decrease the duplicated codes.
It could be helful to maintain the codes.

Signed-off-by: Gao Feng <redacted>
---
 drivers/net/ipvlan/ipvlan_main.c | 68 +++++++++++++++++-----------------------
 1 file changed, 29 insertions(+), 39 deletions(-)

diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index 693ec5b..5874d30 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c

@@ -669,23 +669,22 @@ static int ipvlan_device_event(struct notifier_block *unused,
        return NOTIFY_DONE;
 }

-static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
+static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
 {
        struct ipvl_addr *addr;

-       if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
-               netif_err(ipvlan, ifup, ipvlan->dev,
-                         "Failed to add IPv6=%pI6c addr for %s intf\n",
-                         ip6_addr, ipvlan->dev->name);
-               return -EINVAL;
-       }
        addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
        if (!addr)
                return -ENOMEM;

        addr->master = ipvlan;
-       memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr));
-       addr->atype = IPVL_IPV6;
+       if (is_v6) {
+               memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr));
+               addr->atype = IPVL_IPV6;
+       } else {
+               memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr));
+               addr->atype = IPVL_IPV4;
+       }
        list_add_tail(&addr->anode, &ipvlan->addrs);

        /* If the interface is not up, the address will be added to the hash

@@ -697,11 +696,11 @@ static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
        return 0;
 }

-static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
+static void ipvlan_del_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
 {
        struct ipvl_addr *addr;

-       addr = ipvlan_find_addr(ipvlan, ip6_addr, true);
+       addr = ipvlan_find_addr(ipvlan, iaddr, is_v6);
        if (!addr)
                return;

@@ -712,6 +711,23 @@ static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
        return;
 }

+static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
+{
+       if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
+               netif_err(ipvlan, ifup, ipvlan->dev,
+                         "Failed to add IPv6=%pI6c addr for %s intf\n",
+                         ip6_addr, ipvlan->dev->name);
+               return -EINVAL;
+       }
+
+       return ipvlan_add_addr(ipvlan, ip6_addr, true);
+}
+
+static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
+{
+       return ipvlan_del_addr(ipvlan, ip6_addr, true);
+}
+
 static int ipvlan_addr6_event(struct notifier_block *unused,
                              unsigned long event, void *ptr)
 {

@@ -745,45 +761,19 @@ static int ipvlan_addr6_event(struct notifier_block *unused,

 static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
 {
-       struct ipvl_addr *addr;
-
        if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
                netif_err(ipvlan, ifup, ipvlan->dev,
                          "Failed to add IPv4=%pI4 on %s intf.\n",
                          ip4_addr, ipvlan->dev->name);
                return -EINVAL;
        }
-       addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL);
-       if (!addr)
-               return -ENOMEM;
-
-       addr->master = ipvlan;
-       memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr));
-       addr->atype = IPVL_IPV4;
-       list_add_tail(&addr->anode, &ipvlan->addrs);
-
-       /* If the interface is not up, the address will be added to the hash
-        * list by ipvlan_open.
-        */
-       if (netif_running(ipvlan->dev))
-               ipvlan_ht_addr_add(ipvlan, addr);

-       return 0;
+       return ipvlan_add_addr(ipvlan, ip4_addr, false);
 }

 static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
 {
-       struct ipvl_addr *addr;
-
-       addr = ipvlan_find_addr(ipvlan, ip4_addr, false);
-       if (!addr)
-               return;
-
-       ipvlan_ht_addr_del(addr);
-       list_del(&addr->anode);
-       kfree_rcu(addr, rcu);
-
-       return;
+       return ipvlan_del_addr(ipvlan, ip4_addr, false);
 }

 static int ipvlan_addr4_event(struct notifier_block *unused,
--

1.9.1