From: Gao Feng <fgao@ikuai8.com>
Date: Fri, 10 Mar 2017 04:38:47 +0000 (+0800)
Subject: net: Eliminate duplicated codes by creating one new function in_dev_select_addr
X-Git-Tag: v4.12-rc1~108^2~450
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=8b57fd1ec13e22b3e722891ff7a6e6ccaf286779;p=linux.git

net: Eliminate duplicated codes by creating one new function in_dev_select_addr

There are two duplicated loops codes which used to select right
address in current codes. Now eliminate these codes by creating
one new function in_dev_select_addr.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index cebedd545e5e..927f1d4b8c80 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1192,6 +1192,18 @@ static int inet_gifconf(struct net_device *dev, char __user *buf, int len)
 	return done;
 }
 
+static __be32 in_dev_select_addr(const struct in_device *in_dev,
+				 int scope)
+{
+	for_primary_ifa(in_dev) {
+		if (ifa->ifa_scope != RT_SCOPE_LINK &&
+		    ifa->ifa_scope <= scope)
+			return ifa->ifa_local;
+	} endfor_ifa(in_dev);
+
+	return 0;
+}
+
 __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope)
 {
 	__be32 addr = 0;
@@ -1228,13 +1240,9 @@ __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope)
 	if (master_idx &&
 	    (dev = dev_get_by_index_rcu(net, master_idx)) &&
 	    (in_dev = __in_dev_get_rcu(dev))) {
-		for_primary_ifa(in_dev) {
-			if (ifa->ifa_scope != RT_SCOPE_LINK &&
-			    ifa->ifa_scope <= scope) {
-				addr = ifa->ifa_local;
-				goto out_unlock;
-			}
-		} endfor_ifa(in_dev);
+		addr = in_dev_select_addr(in_dev, scope);
+		if (addr)
+			goto out_unlock;
 	}
 
 	/* Not loopback addresses on loopback should be preferred
@@ -1249,13 +1257,9 @@ __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope)
 		if (!in_dev)
 			continue;
 
-		for_primary_ifa(in_dev) {
-			if (ifa->ifa_scope != RT_SCOPE_LINK &&
-			    ifa->ifa_scope <= scope) {
-				addr = ifa->ifa_local;
-				goto out_unlock;
-			}
-		} endfor_ifa(in_dev);
+		addr = in_dev_select_addr(in_dev, scope);
+		if (addr)
+			goto out_unlock;
 	}
 out_unlock:
 	rcu_read_unlock();