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    Subject[PATCH AUTOSEL for 3.18 15/53] net: ipv6: send unsolicited NA on admin up
    Date
    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;
    --
    2.14.1
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