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ipv6: Replace inet6_ifaddr->dead with state

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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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Herbert Xu 2010-05-18 15:36:06 -07:00 • committed by David S. Miller
commit e9d3e08497
2 changed files with 19 additions and 9 deletions
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16
net/ipv6/addrconf.c
View file

@ -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;
}