netdev - Re: [PATCH] Fix 2.6.34-rc1 regression in disable

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Message-ID: <4D00F58A.2050307@hp.com>
Date:	Thu, 09 Dec 2010 10:28:10 -0500
From:	Brian Haley <brian.haley@...com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	Mahesh Kelkar <maheshkelkar@...il.com>,
	Lorenzo Colitti <lorenzo@...gle.com>,
	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>,
	Stephen Hemminger <shemminger@...tta.com>, stable@...nel.org
Subject: Re: [PATCH] Fix 2.6.34-rc1 regression in  disable_ipv6 support

On 12/08/2010 11:16 PM, Eric W. Biederman wrote:
> Finding the real bug is beyond me right now, but fixing the regression
> in disable_ipv6 is simple.  We can just delete ::1 when we bring down
> the loopback interface, and it will be restored automatically when we
> bring the loopback interface back up.

Hi Eric,

This would work as well, same check, different way.

Signed-off-by: Brian Haley <brian.haley@...com>

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 23cc8e1..5d16a9d 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2728,7 +2728,8 @@ static int addrconf_ifdown(struct net_device *dev, int how)
 		   and not link-local, then retain it. */
 		if (!how &&
 		    (ifa->flags&IFA_F_PERMANENT) &&
-		    !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
+		    !(ipv6_addr_type(&ifa->addr) &
+		      (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_LOOPBACK))) {
 			list_move_tail(&ifa->if_list, &keep_list);
 
 			/* If not doing DAD on this address, just keep it. */
--
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