[072/205] IPv6: only notify protocols if address is completely gone

Submitted by gregkh@suse.de on July 30, 2010, 5:51 p.m.

Details

Message ID 20100730175140.180788935@clark.site
State Not Applicable
Delegated to: David Miller
Headers show

Commit Message

gregkh@suse.de July 30, 2010, 5:51 p.m.
2.6.34-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Stephen Hemminger <shemminger@vyatta.com>

(cherry picked from commit 8595805aafc8b077e01804c9a3668e9aa3510e89)

The notifier for address down should only be called if address is completely
gone, not just being marked as tentative on link transition. The code
in net-next would case bonding/sctp/s390 to see address disappear on link
down, but they would never see it reappear on link up.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 net/ipv6/addrconf.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)



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--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2729,7 +2729,9 @@  static int addrconf_ifdown(struct net_de
 		write_unlock_bh(&idev->lock);
 
 		__ipv6_ifa_notify(RTM_DELADDR, ifa);
-		atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
+		if (ifa->dead)
+			atomic_notifier_call_chain(&inet6addr_chain,
+						   NETDEV_DOWN, ifa);
 		in6_ifa_put(ifa);
 
 		write_lock_bh(&idev->lock);