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-rw-r--r--include/net/if_inet6.h1
-rw-r--r--net/ipv6/addrconf.c39
2 files changed, 32 insertions, 8 deletions
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index e4c5a2d..1628b8f 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -166,6 +166,7 @@ struct inet6_dev {
struct net_device *dev;
struct list_head addr_list;
+ int valid_ll_addr_cnt;
struct ifmcaddr6 *mc_list;
struct ifmcaddr6 *mc_tomb;
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 4e4cc1f..20d92ff 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3277,6 +3277,7 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
{
struct net_device *dev = ifp->idev->dev;
struct in6_addr lladdr;
+ bool send_rs;
addrconf_del_dad_timer(ifp);
@@ -3290,20 +3291,25 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
router advertisements, start sending router solicitations.
*/
- if (ipv6_accept_ra(ifp->idev) &&
- ifp->idev->cnf.rtr_solicits > 0 &&
- (dev->flags&IFF_LOOPBACK) == 0 &&
- (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
+ read_lock_bh(&ifp->idev->lock);
+ spin_lock(&ifp->lock);
+ send_rs = ipv6_accept_ra(ifp->idev) &&
+ ifp->idev->cnf.rtr_solicits > 0 &&
+ (dev->flags&IFF_LOOPBACK) == 0 &&
+ ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL &&
+ ifp->idev->valid_ll_addr_cnt == 1;
+ spin_unlock(&ifp->lock);
+ read_unlock_bh(&ifp->idev->lock);
+
+ if (send_rs) {
/*
* If a host as already performed a random delay
* [...] as part of DAD [...] there is no need
* to delay again before sending the first RS
*/
- if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
- ndisc_send_rs(dev, &lladdr,
- &in6addr_linklocal_allrouters);
- else
+ if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
return;
+ ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters);
write_lock_bh(&ifp->idev->lock);
spin_lock(&ifp->lock);
@@ -4576,6 +4582,19 @@ errout:
rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
}
+static void update_valid_ll_addr_cnt(struct inet6_ifaddr *ifp, int count)
+{
+ write_lock_bh(&ifp->idev->lock);
+ spin_lock(&ifp->lock);
+ if (((ifp->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|
+ IFA_F_DADFAILED)) == IFA_F_PERMANENT) &&
+ (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL))
+ ifp->idev->valid_ll_addr_cnt += count;
+ WARN_ON(ifp->idev->valid_ll_addr_cnt < 0);
+ spin_unlock(&ifp->lock);
+ write_unlock_bh(&ifp->idev->lock);
+}
+
static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
{
struct net *net = dev_net(ifp->idev->dev);
@@ -4584,6 +4603,8 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
switch (event) {
case RTM_NEWADDR:
+ update_valid_ll_addr_cnt(ifp, 1);
+
/*
* If the address was optimistic
* we inserted the route at the start of
@@ -4599,6 +4620,8 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
ifp->idev->dev, 0, 0);
break;
case RTM_DELADDR:
+ update_valid_ll_addr_cnt(ifp, -1);
+
if (ifp->idev->cnf.forwarding)
addrconf_leave_anycast(ifp);
addrconf_leave_solict(ifp->idev, &ifp->addr);