[patch] ipv6-keep-route-for-tentative-address.patch

ipv6-keep-route-for-tentative-address.patch (text/plain), 1.32 KB, created by Martin Volf on 2010-08-20 04:57:22 UTC

From [e-mail]  Tue Jul 27 16:56:59 2010
From: Stephen Hemminger <[e-mail]>
Date: Mon, 24 May 2010 11:31:18 -0700
Subject: IPv6: keep route for tentative address
To: Emil S Tantilov <[e-mail]>
Cc: NetDev <[e-mail]>, [e-mail], Greg KH <[e-mail]>, "David S. Miller" <[e-mail]>, <[e-mail]>
Message-ID: <20100524113118.47cc9852@nehalam>

From: Stephen Hemminger <[e-mail]>

(cherry picked from commit 93fa159abe50d3c55c7f83622d3f5c09b6e06f4b)

Recent changes preserve IPv6 address when link goes down (good).
But would cause address to point to dead dst entry (bad).
The simplest fix is to just not delete route if address is
being held for later use.

Signed-off-by: Stephen Hemminger <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

---
 net/ipv6/addrconf.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4047,7 +4047,8 @@ static void __ipv6_ifa_notify(int event,
 			addrconf_leave_anycast(ifp);
 		addrconf_leave_solict(ifp->idev, &ifp->addr);
 		dst_hold(&ifp->rt->u.dst);
-		if (ip6_del_rt(ifp->rt))
+
+		if (ifp->dead && ip6_del_rt(ifp->rt))
 			dst_free(&ifp->rt->u.dst);
 		break;
 	}