net IPv6 : Fix broken IPv6 routing table after loopback down-up

[karo-tx-linux.git] / net / ipv6 / addrconf.c

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 8589c2d4bc6f73a4bf6cf66b61f0cc98d7e4253d..d84033b77b7188a5775835aad967e9a25599d979 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2404,6 +2404,9 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
 static void init_loopback(struct net_device *dev)
 {
        struct inet6_dev  *idev;
+       struct net_device *sp_dev;
+       struct inet6_ifaddr *sp_ifa;
+       struct rt6_info *sp_rt;
 
        /* ::1 */
 
@@ -2415,6 +2418,30 @@ static void init_loopback(struct net_device *dev)
        }
 
        add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
+
+       /* Add routes to other interface's IPv6 addresses */
+       for_each_netdev(dev_net(dev), sp_dev) {
+               if (!strcmp(sp_dev->name, dev->name))
+                       continue;
+
+               idev = __in6_dev_get(sp_dev);
+               if (!idev)
+                       continue;
+
+               read_lock_bh(&idev->lock);
+               list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {
+
+                       if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
+                               continue;
+
+                       sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);
+
+                       /* Failure cases are ignored */
+                       if (!IS_ERR(sp_rt))
+                               ip6_ins_rt(sp_rt);
+               }
+               read_unlock_bh(&idev->lock);
+       }
 }
 
 static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr)