From: David Ahern dsa@cumulusnetworks.com
[ Upstream commit 4a6e3c5def13c91adf2acc613837001f09af3baa ]
ndisc_notify is the ipv6 equivalent to arp_notify. When arp_notify is set to 1, gratuitous arp requests are sent when the device is brought up. The same is expected when ndisc_notify is set to 1 (per ndisc_notify in Documentation/networking/ip-sysctl.txt). The NA is not sent on NETDEV_UP event; add it.
Fixes: 5cb04436eef6 ("ipv6: add knob to send unsolicited ND on link-layer address change") Signed-off-by: David Ahern dsa@cumulusnetworks.com Acked-by: Hannes Frederic Sowa hannes@stressinduktion.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- net/ipv6/ndisc.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index a46c50423aec..2e9e0af9e759 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1646,6 +1646,8 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event, case NETDEV_CHANGEADDR: neigh_changeaddr(&nd_tbl, dev); fib6_run_gc(0, net, false); + /* fallthrough */ + case NETDEV_UP: idev = in6_dev_get(dev); if (!idev) break;