From: Yasushi Asano Date: Tue, 31 Dec 2013 03:04:19 +0000 (+0900) Subject: ipv6 addrconf: fix preferred lifetime state-changing behavior while valid_lft is... X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fad8da3e085ddf5e661090033287f1a5d62858fc;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git ipv6 addrconf: fix preferred lifetime state-changing behavior while valid_lft is infinity Fixed a problem with setting the lifetime of an IPv6 address. When setting preferred_lft to a value not zero or infinity, while valid_lft is infinity(0xffffffff) preferred lifetime is set to forever and does not update. Therefore preferred lifetime never becomes deprecated. valid lifetime and preferred lifetime should be set independently, even if valid lifetime is infinity, preferred lifetime must expire correctly (meaning it must eventually become deprecated) Signed-off-by: Yasushi Asano Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index d5fa5b8c443e..1a341f74aa3f 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3456,7 +3456,12 @@ restart: &inet6_addr_lst[i], addr_lst) { unsigned long age; - if (ifp->flags & IFA_F_PERMANENT) + /* When setting preferred_lft to a value not zero or + * infinity, while valid_lft is infinity + * IFA_F_PERMANENT has a non-infinity life time. + */ + if ((ifp->flags & IFA_F_PERMANENT) && + (ifp->prefered_lft == INFINITY_LIFE_TIME)) continue; spin_lock(&ifp->lock); @@ -3481,7 +3486,8 @@ restart: ifp->flags |= IFA_F_DEPRECATED; } - if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)) + if ((ifp->valid_lft != INFINITY_LIFE_TIME) && + (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))) next = ifp->tstamp + ifp->valid_lft * HZ; spin_unlock(&ifp->lock); @@ -3761,7 +3767,8 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope), ifa->idev->dev->ifindex); - if (!(ifa->flags&IFA_F_PERMANENT)) { + if (!((ifa->flags&IFA_F_PERMANENT) && + (ifa->prefered_lft == INFINITY_LIFE_TIME))) { preferred = ifa->prefered_lft; valid = ifa->valid_lft; if (preferred != INFINITY_LIFE_TIME) {