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authorHerbert Xu <herbert@gondor.apana.org.au>2010-05-18 15:36:06 -0700
committerDavid S. Miller <davem@davemloft.net>2010-05-18 15:36:06 -0700
commite9d3e084975869754d16f639378675c353560be9 (patch)
tree3f933fea12746b24247ccec79cb4a1fbdf50833b /net/ipv6
parente29f5dbc9e9719af158a960e5c1d16f32740ebc3 (diff)
downloadlinux-2.6.34-ux500-e9d3e084975869754d16f639378675c353560be9.tar.gz
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 <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/addrconf.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 75d3b8c1e85..4e5ad9de167 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;
}