+
+ /* If just doing link down, and address is permanent
+ and not link-local, then retain it. */
+ if (how == 0 &&
+ (ifa->flags&IFA_F_PERMANENT) &&
+ !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
+
+ /* Move to holding list */
+ *bifa = ifa;
+ bifa = &ifa->if_next;
+
+ /* If not doing DAD on this address, just keep it. */
+ if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) ||
+ idev->cnf.accept_dad <= 0 ||
+ (ifa->flags & IFA_F_NODAD))
+ continue;
+
+ /* If it was tentative already, no need to notify */
+ if (ifa->flags & IFA_F_TENTATIVE)
+ continue;
+
+ /* Flag it for later restoration when link comes up */
+ ifa->flags |= IFA_F_TENTATIVE;
+ in6_ifa_hold(ifa);
+ } else {
+ ifa->dead = 1;
+ }