From e9d3e084975869754d16f639378675c353560be9 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 18 May 2010 15:36:06 -0700 Subject: ipv6: Replace inet6_ifaddr->dead with state This patch replaces the boolean dead flag on inet6_ifaddr with a state enum. This allows us to roll back changes when deleting an address according to whether DAD has completed or not. This patch only adds the state field and does not change the logic. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'net') diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 75d3b8c1e856..4e5ad9de1679 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -553,7 +553,7 @@ void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) if (del_timer(&ifp->timer)) pr_notice("Timer is still running, when freeing ifa=%p\n", ifp); - if (!ifp->dead) { + if (ifp->state != INET6_IFADDR_STATE_DEAD) { pr_warning("Freeing alive inet6 address %p\n", ifp); return; } @@ -648,6 +648,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen, ipv6_addr_copy(&ifa->addr, addr); spin_lock_init(&ifa->lock); + spin_lock_init(&ifa->state_lock); init_timer(&ifa->timer); INIT_HLIST_NODE(&ifa->addr_lst); ifa->timer.data = (unsigned long) ifa; @@ -720,7 +721,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp) hash = ipv6_addr_hash(&ifp->addr); - ifp->dead = 1; + ifp->state = INET6_IFADDR_STATE_DEAD; spin_lock_bh(&addrconf_hash_lock); hlist_del_init_rcu(&ifp->addr_lst); @@ -2665,7 +2666,7 @@ static int addrconf_ifdown(struct net_device *dev, int how) ifa = list_first_entry(&idev->tempaddr_list, struct inet6_ifaddr, tmp_list); list_del(&ifa->tmp_list); - ifa->dead = 1; + ifa->state = INET6_IFADDR_STATE_DEAD; write_unlock_bh(&idev->lock); spin_lock_bh(&ifa->lock); @@ -2707,7 +2708,7 @@ static int addrconf_ifdown(struct net_device *dev, int how) write_unlock_bh(&idev->lock); } else { list_del(&ifa->if_list); - ifa->dead = 1; + ifa->state = INET6_IFADDR_STATE_DEAD; write_unlock_bh(&idev->lock); /* clear hash table */ @@ -2717,7 +2718,7 @@ static int addrconf_ifdown(struct net_device *dev, int how) } __ipv6_ifa_notify(RTM_DELADDR, ifa); - if (ifa->dead) + if (ifa->state == INET6_IFADDR_STATE_DEAD) atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa); in6_ifa_put(ifa); @@ -2815,7 +2816,7 @@ static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags) net_srandom(ifp->addr.s6_addr32[3]); read_lock_bh(&idev->lock); - if (ifp->dead) + if (ifp->state == INET6_IFADDR_STATE_DEAD) goto out; spin_lock(&ifp->lock); @@ -4050,7 +4051,8 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) addrconf_leave_solict(ifp->idev, &ifp->addr); dst_hold(&ifp->rt->u.dst); - if (ifp->dead && ip6_del_rt(ifp->rt)) + if (ifp->state == INET6_IFADDR_STATE_DEAD && + ip6_del_rt(ifp->rt)) dst_free(&ifp->rt->u.dst); break; } -- cgit v1.2.1