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Diffstat (limited to 'net/ipv6/addrconf.c')
-rw-r--r--net/ipv6/addrconf.c111
1 files changed, 98 insertions, 13 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 4ea8cf7c0cc..510220f2ae8 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -137,6 +137,7 @@ static int addrconf_ifdown(struct net_device *dev, int how);
static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
static void addrconf_dad_timer(unsigned long data);
static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
+static void addrconf_dad_run(struct inet6_dev *idev);
static void addrconf_rs_timer(unsigned long data);
static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
@@ -388,6 +389,9 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
}
#endif
+ if (netif_carrier_ok(dev))
+ ndev->if_flags |= IF_READY;
+
write_lock_bh(&addrconf_lock);
dev->ip6_ptr = ndev;
write_unlock_bh(&addrconf_lock);
@@ -415,6 +419,7 @@ static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
if ((idev = ipv6_add_dev(dev)) == NULL)
return NULL;
}
+
if (dev->flags&IFF_UP)
ipv6_mc_up(idev);
return idev;
@@ -634,8 +639,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
}
#endif
- for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;
- ifap = &ifa->if_next) {
+ for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
if (ifa == ifp) {
*ifap = ifa->if_next;
__in6_ifa_put(ifp);
@@ -643,6 +647,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
break;
deleted = 1;
+ continue;
} else if (ifp->flags & IFA_F_PERMANENT) {
if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
ifp->prefix_len)) {
@@ -666,6 +671,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
}
}
}
+ ifap = &ifa->if_next;
}
write_unlock_bh(&idev->lock);
@@ -903,11 +909,18 @@ int ipv6_dev_get_saddr(struct net_device *daddr_dev,
score.addr_type = __ipv6_addr_type(&ifa->addr);
- /* Rule 0: Candidate Source Address (section 4)
+ /* Rule 0:
+ * - Tentative Address (RFC2462 section 5.4)
+ * - A tentative address is not considered
+ * "assigned to an interface" in the traditional
+ * sense.
+ * - Candidate Source Address (section 4)
* - In any case, anycast addresses, multicast
* addresses, and the unspecified address MUST
* NOT be included in a candidate set.
*/
+ if (ifa->flags & IFA_F_TENTATIVE)
+ continue;
if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
score.addr_type & IPV6_ADDR_MULTICAST)) {
LIMIT_NETDEBUG(KERN_DEBUG
@@ -1215,10 +1228,8 @@ int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
/* Gets referenced address, destroys ifaddr */
-void addrconf_dad_failure(struct inet6_ifaddr *ifp)
+void addrconf_dad_stop(struct inet6_ifaddr *ifp)
{
- if (net_ratelimit())
- printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
if (ifp->flags&IFA_F_PERMANENT) {
spin_lock_bh(&ifp->lock);
addrconf_del_timer(ifp);
@@ -1244,6 +1255,12 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp)
ipv6_del_addr(ifp);
}
+void addrconf_dad_failure(struct inet6_ifaddr *ifp)
+{
+ if (net_ratelimit())
+ printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
+ addrconf_dad_stop(ifp);
+}
/* Join to solicited addr multicast group. */
@@ -2133,9 +2150,42 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
{
struct net_device *dev = (struct net_device *) data;
struct inet6_dev *idev = __in6_dev_get(dev);
+ int run_pending = 0;
switch(event) {
case NETDEV_UP:
+ case NETDEV_CHANGE:
+ if (event == NETDEV_UP) {
+ if (!netif_carrier_ok(dev)) {
+ /* device is not ready yet. */
+ printk(KERN_INFO
+ "ADDRCONF(NETDEV_UP): %s: "
+ "link is not ready\n",
+ dev->name);
+ break;
+ }
+ } else {
+ if (!netif_carrier_ok(dev)) {
+ /* device is still not ready. */
+ break;
+ }
+
+ if (idev) {
+ if (idev->if_flags & IF_READY) {
+ /* device is already configured. */
+ break;
+ }
+ idev->if_flags |= IF_READY;
+ }
+
+ printk(KERN_INFO
+ "ADDRCONF(NETDEV_CHANGE): %s: "
+ "link becomes ready\n",
+ dev->name);
+
+ run_pending = 1;
+ }
+
switch(dev->type) {
case ARPHRD_SIT:
addrconf_sit_config(dev);
@@ -2152,6 +2202,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
break;
};
if (idev) {
+ if (run_pending)
+ addrconf_dad_run(idev);
+
/* If the MTU changed during the interface down, when the
interface up, the changed MTU must be reflected in the
idev as well as routers.
@@ -2186,8 +2239,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
*/
addrconf_ifdown(dev, event != NETDEV_DOWN);
break;
- case NETDEV_CHANGE:
- break;
+
case NETDEV_CHANGENAME:
#ifdef CONFIG_SYSCTL
if (idev) {
@@ -2268,7 +2320,7 @@ static int addrconf_ifdown(struct net_device *dev, int how)
/* Step 3: clear flags for stateless addrconf */
if (how != 1)
- idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD);
+ idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
/* Step 4: clear address list */
#ifdef CONFIG_IPV6_PRIVACY
@@ -2377,11 +2429,20 @@ out:
/*
* Duplicate Address Detection
*/
+static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
+{
+ unsigned long rand_num;
+ struct inet6_dev *idev = ifp->idev;
+
+ rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
+ ifp->probes = idev->cnf.dad_transmits;
+ addrconf_mod_timer(ifp, AC_DAD, rand_num);
+}
+
static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
{
struct inet6_dev *idev = ifp->idev;
struct net_device *dev = idev->dev;
- unsigned long rand_num;
addrconf_join_solict(dev, &ifp->addr);
@@ -2390,7 +2451,6 @@ static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
flags);
net_srandom(ifp->addr.s6_addr32[3]);
- rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
read_lock_bh(&idev->lock);
if (ifp->dead)
@@ -2407,8 +2467,17 @@ static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
return;
}
- ifp->probes = idev->cnf.dad_transmits;
- addrconf_mod_timer(ifp, AC_DAD, rand_num);
+ if (idev->if_flags & IF_READY)
+ addrconf_dad_kick(ifp);
+ else {
+ /*
+ * If the defice is not ready:
+ * - keep it tentative if it is a permanent address.
+ * - otherwise, kill it.
+ */
+ in6_ifa_hold(ifp);
+ addrconf_dad_stop(ifp);
+ }
spin_unlock_bh(&ifp->lock);
out:
@@ -2492,6 +2561,22 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
}
}
+static void addrconf_dad_run(struct inet6_dev *idev) {
+ struct inet6_ifaddr *ifp;
+
+ read_lock_bh(&idev->lock);
+ for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
+ spin_lock_bh(&ifp->lock);
+ if (!(ifp->flags & IFA_F_TENTATIVE)) {
+ spin_unlock_bh(&ifp->lock);
+ continue;
+ }
+ spin_unlock_bh(&ifp->lock);
+ addrconf_dad_kick(ifp);
+ }
+ read_unlock_bh(&idev->lock);
+}
+
#ifdef CONFIG_PROC_FS
struct if6_iter_state {
int bucket;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 15:17:53 +0000