[IPV4]: Remove extra argument from arp_ignore.

arp_ignore has two arguments: dev & in_dev. dev is used for
inet_confirm_addr calling only.

inet_confirm_addr, in turn, either gets in_dev from the device passed
or iterates over all network devices if the device passed is NULL. It
seems logical to directly pass in_dev into inet_confirm_addr.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 12 insertions, 18 deletions

diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index b3c5081de02d..45f373107530 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -135,7 +135,7 @@ extern int		devinet_ioctl(unsigned int cmd, void __user *);
 extern void             devinet_init(void);
 extern struct in_device *inetdev_by_index(int);
 extern __be32           inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
-extern __be32           inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local, int scope);
+extern __be32           inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
 extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
 
 static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 357e8987146b..6f0827b2b154 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -382,8 +382,7 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb)
                 read_unlock_bh(&neigh->lock);
 }
 
-static int arp_ignore(struct in_device *in_dev, struct net_device *dev,
-                      __be32 sip, __be32 tip)
+static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip)
 {
         int scope;
 
@@ -403,7 +402,7 @@ static int arp_ignore(struct in_device *in_dev, struct net_device *dev,
         case 3: /* Do not reply for scope host addresses */
                 sip = 0;
                 scope = RT_SCOPE_LINK;
-                dev = NULL;
+                in_dev = NULL;
                 break;
         case 4: /* Reserved */
         case 5:
@@ -415,7 +414,7 @@ static int arp_ignore(struct in_device *in_dev, struct net_device *dev,
         default:
                 return 0;
         }
-        return !inet_confirm_addr(dev, sip, tip, scope);
+        return !inet_confirm_addr(in_dev, sip, tip, scope);
 }
 
 static int arp_filter(__be32 sip, __be32 tip, struct net_device *dev)
@@ -807,7 +806,7 @@ static int arp_process(struct sk_buff *skb)
         if (sip == 0) {
                 if (arp->ar_op == htons(ARPOP_REQUEST) &&
                     inet_addr_type(&init_net, tip) == RTN_LOCAL &&
-                    !arp_ignore(in_dev,dev,sip,tip))
+                    !arp_ignore(in_dev, sip, tip))
                         arp_send(ARPOP_REPLY, ETH_P_ARP, sip, dev, tip, sha,
                                  dev->dev_addr, sha);
                 goto out;
@@ -825,7 +824,7 @@ static int arp_process(struct sk_buff *skb)
                                 int dont_send = 0;
 
                                 if (!dont_send)
-                                        dont_send |= arp_ignore(in_dev,dev,sip,tip);
+                                        dont_send |= arp_ignore(in_dev,sip,tip);
                                 if (!dont_send && IN_DEV_ARPFILTER(in_dev))
                                         dont_send |= arp_filter(sip,tip,dev);
                                 if (!dont_send)
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 03db15b10309..dc1665a2b075 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -968,24 +968,19 @@ static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst,
 
 /*
  * Confirm that local IP address exists using wildcards:
- * - dev: only on this interface, 0=any interface
+ * - in_dev: only on this interface, 0=any interface
  * - dst: only in the same subnet as dst, 0=any dst
  * - local: address, 0=autoselect the local address
  * - scope: maximum allowed scope value for the local address
  */
-__be32 inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local, int scope)
+__be32 inet_confirm_addr(struct in_device *in_dev,
+                         __be32 dst, __be32 local, int scope)
 {
         __be32 addr = 0;
-        struct in_device *in_dev;
-
-        if (dev) {
-                rcu_read_lock();
-                if ((in_dev = __in_dev_get_rcu(dev)))
-                        addr = confirm_addr_indev(in_dev, dst, local, scope);
-                rcu_read_unlock();
+        struct net_device *dev;
 
-                return addr;
-        }
+        if (in_dev != NULL)
+                return confirm_addr_indev(in_dev, dst, local, scope);
 
         read_lock(&dev_base_lock);
         rcu_read_lock();