This is a note to let you know that I've just added the patch titled
net: ipv6: Don't purge default router if accept_ra=2
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-ipv6-don-t-purge-default-router-if-accept_ra-2.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 050003433737f47a3e2bc7e46eaf5a1269a7ac02 Mon Sep 17 00:00:00 2001
From: Lorenzo Colitti <lorenzo@xxxxxxxxxx>
Date: Sun, 3 Mar 2013 20:46:46 +0000
Subject: net: ipv6: Don't purge default router if accept_ra=2
From: Lorenzo Colitti <lorenzo@xxxxxxxxxx>
[ Upstream commit 3e8b0ac3e41e3c882222a5522d5df7212438ab51 ]
Setting net.ipv6.conf.<interface>.accept_ra=2 causes the kernel
to accept RAs even when forwarding is enabled. However, enabling
forwarding purges all default routes on the system, breaking
connectivity until the next RA is received. Fix this by not
purging default routes on interfaces that have accept_ra=2.
Signed-off-by: Lorenzo Colitti <lorenzo@xxxxxxxxxx>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx>
Acked-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/route.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1990,7 +1990,8 @@ void rt6_purge_dflt_routers(struct net *
restart:
read_lock_bh(&table->tb6_lock);
for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) {
- if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) {
+ if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF) &&
+ (!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2)) {
dst_hold(&rt->dst);
read_unlock_bh(&table->tb6_lock);
ip6_del_rt(rt);
Patches currently in stable-queue which might be from lorenzo@xxxxxxxxxx are
queue-3.8/net-ipv6-don-t-purge-default-router-if-accept_ra-2.patch
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