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net: ipv6: send unsolicited NA on admin up

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[ Upstream commit 4a6e3c5def ]

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: 5cb04436ee ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Ahern
2017-04-12 11:49:04 -07:00
committed by Greg Kroah-Hartman
parent 8cda29d440
commit 2bea487529
1 changed files with 2 additions and 0 deletions
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2
net/ipv6/ndisc.c
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@@ -1723,6 +1723,8 @@ 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;