From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shmulik Ladkani Subject: [PATCH] ipv6: unify logic evaluating inet6_dev's accept_ra property Date: Thu, 29 Nov 2012 11:26:19 +0200 Message-ID: <1354181179-16294-1-git-send-email-shmulik.ladkani@gmail.com> Cc: netdev@vger.kernel.org, Hideaki YOSHIFUJI , Thomas Graf , Tore Anderson , shmulik.ladkani@gmail.com To: "David S. Miller" Return-path: Received: from mail-ee0-f46.google.com ([74.125.83.46]:49837 "EHLO mail-ee0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751392Ab2K2J0b (ORCPT ); Thu, 29 Nov 2012 04:26:31 -0500 Received: by mail-ee0-f46.google.com with SMTP id e53so6259653eek.19 for ; Thu, 29 Nov 2012 01:26:30 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: As of 026359b [ipv6: Send ICMPv6 RSes only when RAs are accepted], the logic determining whether to send Router Solicitations is identical to the logic determining whether kernel accepts Router Advertisements. However the condition itself is repeated in several code locations. Unify it by introducing 'ipv6_accept_ra()' accessor. Also, simplify the condition expression, making it more readable. No semantic change. Signed-off-by: Shmulik Ladkani --- Not sure about the proper header to place the 'ipv6_accept_ra' accessor. Currently placed in include/net/ipv6.h. Other candidates were if_inet6.h and addrconf.h. include/net/ipv6.h | 10 ++++++++++ net/ipv6/addrconf.c | 3 +-- net/ipv6/ndisc.c | 16 ++-------------- 3 files changed, 13 insertions(+), 16 deletions(-) diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 979bf6c..cd15585 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -271,6 +271,16 @@ struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space, extern bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb); +static inline bool ipv6_accept_ra(struct inet6_dev *idev) +{ + /* + * If forwarding is enabled, RA are not accepted unless the special + * hybrid mode (accept_ra=2) is enabled. + */ + return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 : + idev->cnf.accept_ra; +} + #if IS_ENABLED(CONFIG_IPV6) static inline int ip6_frag_nqueues(struct net *net) { diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 0424e4e..ca1ed8a 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3005,8 +3005,7 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp) router advertisements, start sending router solicitations. */ - if (((ifp->idev->cnf.accept_ra == 1 && !ifp->idev->cnf.forwarding) || - ifp->idev->cnf.accept_ra == 2) && + if (ipv6_accept_ra(ifp->idev) && ifp->idev->cnf.rtr_solicits > 0 && (dev->flags&IFF_LOOPBACK) == 0 && (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) { diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 2edce30..980cdc3 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1033,18 +1033,6 @@ errout: rtnl_set_sk_err(net, RTNLGRP_ND_USEROPT, err); } -static inline int accept_ra(struct inet6_dev *in6_dev) -{ - /* - * If forwarding is enabled, RA are not accepted unless the special - * hybrid mode (accept_ra=2) is enabled. - */ - if (in6_dev->cnf.forwarding && in6_dev->cnf.accept_ra < 2) - return 0; - - return in6_dev->cnf.accept_ra; -} - static void ndisc_router_discovery(struct sk_buff *skb) { struct ra_msg *ra_msg = (struct ra_msg *)skb_transport_header(skb); @@ -1092,7 +1080,7 @@ static void ndisc_router_discovery(struct sk_buff *skb) return; } - if (!accept_ra(in6_dev)) + if (!ipv6_accept_ra(in6_dev)) goto skip_linkparms; #ifdef CONFIG_IPV6_NDISC_NODETYPE @@ -1248,7 +1236,7 @@ skip_linkparms: NEIGH_UPDATE_F_ISROUTER); } - if (!accept_ra(in6_dev)) + if (!ipv6_accept_ra(in6_dev)) goto out; #ifdef CONFIG_IPV6_ROUTE_INFO -- 1.7.9