From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pablo Neira Ayuso Subject: [PATCH 13/31] netfilter: nat: remove unnecessary rcu_read_lock in nf_nat_redirect_ipv{4/6} Date: Tue, 9 Oct 2018 01:01:07 +0200 Message-ID: <20181008230125.2330-14-pablo@netfilter.org> References: <20181008230125.2330-1-pablo@netfilter.org> Cc: davem@davemloft.net, netdev@vger.kernel.org To: netfilter-devel@vger.kernel.org Return-path: Received: from mail.us.es ([193.147.175.20]:56230 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726775AbeJIGPo (ORCPT ); Tue, 9 Oct 2018 02:15:44 -0400 Received: from antivirus1-rhel7.int (unknown [192.168.2.11]) by mail.us.es (Postfix) with ESMTP id 41C1953AA3F for ; Tue, 9 Oct 2018 01:01:41 +0200 (CEST) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 32BC1DA87B for ; Tue, 9 Oct 2018 01:01:41 +0200 (CEST) In-Reply-To: <20181008230125.2330-1-pablo@netfilter.org> Sender: netdev-owner@vger.kernel.org List-ID: From: Taehee Yoo nf_nat_redirect_ipv4() and nf_nat_redirect_ipv6() are only called by netfilter hook point. so that rcu_read_lock and rcu_read_unlock() are unnecessary. Signed-off-by: Taehee Yoo Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_nat_redirect.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/net/netfilter/nf_nat_redirect.c b/net/netfilter/nf_nat_redirect.c index adee04af8d43..78a9e6454ff3 100644 --- a/net/netfilter/nf_nat_redirect.c +++ b/net/netfilter/nf_nat_redirect.c @@ -52,13 +52,11 @@ nf_nat_redirect_ipv4(struct sk_buff *skb, newdst = 0; - rcu_read_lock(); indev = __in_dev_get_rcu(skb->dev); if (indev && indev->ifa_list) { ifa = indev->ifa_list; newdst = ifa->ifa_local; } - rcu_read_unlock(); if (!newdst) return NF_DROP; @@ -97,7 +95,6 @@ nf_nat_redirect_ipv6(struct sk_buff *skb, const struct nf_nat_range2 *range, struct inet6_ifaddr *ifa; bool addr = false; - rcu_read_lock(); idev = __in6_dev_get(skb->dev); if (idev != NULL) { read_lock_bh(&idev->lock); @@ -108,7 +105,6 @@ nf_nat_redirect_ipv6(struct sk_buff *skb, const struct nf_nat_range2 *range, } read_unlock_bh(&idev->lock); } - rcu_read_unlock(); if (!addr) return NF_DROP; -- 2.11.0