netdev - [PATCH next 11/30] ipv4: Only compute net once in ip_do

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Date:	Tue, 15 Sep 2015 20:03:59 -0500
From:	"Eric W. Biederman" <ebiederm@...ssion.com>
To:	Pablo Neira Ayuso <pablo@...filter.org>,
	David Miller <davem@...emloft.net>
Cc:	netfilter-devel@...r.kernel.org, <netdev@...r.kernel.org>
Subject: [PATCH next 11/30] ipv4: Only compute net once in ip_do_fragment

Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 net/ipv4/ip_output.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 9ee622ad8dfa..85b72d450184 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -531,9 +531,11 @@ int ip_do_fragment(struct sock *sk, struct sk_buff *skb,
 	int offset;
 	__be16 not_last_frag;
 	struct rtable *rt = skb_rtable(skb);
+	struct net *net;
 	int err = 0;
 
 	dev = rt->dst.dev;
+	net = dev_net(dev);
 
 	/*
 	 *	Point into the IP datagram header.
@@ -626,7 +628,7 @@ int ip_do_fragment(struct sock *sk, struct sk_buff *skb,
 			err = output(sk, skb);
 
 			if (!err)
-				IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGCREATES);
+				IP_INC_STATS(net, IPSTATS_MIB_FRAGCREATES);
 			if (err || !frag)
 				break;
 
@@ -636,7 +638,7 @@ int ip_do_fragment(struct sock *sk, struct sk_buff *skb,
 		}
 
 		if (err == 0) {
-			IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGOKS);
+			IP_INC_STATS(net, IPSTATS_MIB_FRAGOKS);
 			return 0;
 		}
 
@@ -645,7 +647,7 @@ int ip_do_fragment(struct sock *sk, struct sk_buff *skb,
 			kfree_skb(frag);
 			frag = skb;
 		}
-		IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGFAILS);
+		IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS);
 		return err;
 
 slow_path_clean:
@@ -767,15 +769,15 @@ slow_path:
 		if (err)
 			goto fail;
 
-		IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGCREATES);
+		IP_INC_STATS(net, IPSTATS_MIB_FRAGCREATES);
 	}
 	consume_skb(skb);
-	IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGOKS);
+	IP_INC_STATS(net, IPSTATS_MIB_FRAGOKS);
 	return err;
 
 fail:
 	kfree_skb(skb);
-	IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGFAILS);
+	IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS);
 	return err;
 }
 EXPORT_SYMBOL(ip_do_fragment);
-- 
2.2.1

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