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Date: Fri, 24 Jan 2014 16:29:11 +0800 From: Gao feng <gaofeng@...fujitsu.com> To: netdev@...r.kernel.org Cc: davem@...emloft.net, Gao feng <gaofeng@...fujitsu.com>, Sabrina Dubroca <sd@...asysnail.net>, Hannes Frederic Sowa <hannes@...essinduktion.org>, Weilong Chen <chenweilong@...wei.com> Subject: [PATCH net v2] ipv6: reallocate addrconf router for ipv6 address when lo device up commit 25fb6ca4ed9cad72f14f61629b68dc03c0d9713f "net IPv6 : Fix broken IPv6 routing table after loopback down-up" allocates addrconf router for ipv6 address when lo device up. but commit a881ae1f625c599b460cc8f8a7fcb1c438f699ad "ipv6:don't call addrconf_dst_alloc again when enable lo" breaks this behavior. Since the addrconf router is moved to the garbage list when lo device down, we should release this router and rellocate a new one for ipv6 address when lo device up. This patch solves bug 67951 on bugzilla https://bugzilla.kernel.org/show_bug.cgi?id=67951 change from v1: use ip6_rt_put to repleace ip6_del_rt, thanks Hannes! change code style, suggested by Sergei. CC: Sabrina Dubroca <sd@...asysnail.net> CC: Hannes Frederic Sowa <hannes@...essinduktion.org> Reported-by: Weilong Chen <chenweilong@...wei.com> Signed-off-by: Weilong Chen <chenweilong@...wei.com> Signed-off-by: Gao feng <gaofeng@...fujitsu.com> --- net/ipv6/addrconf.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 4b6b720..dee84d6 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2611,8 +2611,18 @@ static void init_loopback(struct net_device *dev) if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) continue; - if (sp_ifa->rt) - continue; + if (sp_ifa->rt) { + /* This dst has been added to garbage list when + * lo device down, release this obsolete dst and + * reallocate a new router for ifa. + */ + if (sp_ifa->rt->dst.obsolete > 0) { + ip6_rt_put(sp_ifa->rt); + sp_ifa->rt = NULL; + } else { + continue; + } + } sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false); -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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