Commit 3d171f39 authored Jan 08, 2016 by Lubomir Rintel Committed by David S. Miller Jan 10, 2016

ipv6: always add flag an address that failed DAD with DADFAILED



The userspace needs to know why is the address being removed so that it can
perhaps obtain a new address.

Without the DADFAILED flag it's impossible to distinguish removal of a
temporary and tentative address due to DAD failure from other reasons (device
removed, manual address removal).

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 541b8e29

net/ipv6/addrconf.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -1772,12 +1772,13 @@ struct inet6_ifaddr ipv6_get_ifaddr(struct net net, const struct in6_addr *add

		static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
		{
		if (dad_failed)
		ifp->flags \|= IFA_F_DADFAILED;

		if (ifp->flags&IFA_F_PERMANENT) {
		spin_lock_bh(&ifp->lock);
		addrconf_del_dad_work(ifp);
		ifp->flags \|= IFA_F_TENTATIVE;
		if (dad_failed)
		ifp->flags \|= IFA_F_DADFAILED;
		spin_unlock_bh(&ifp->lock);
		if (dad_failed)
		ipv6_ifa_notify(0, ifp);

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