1 files changed, 100 insertions, 30 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 498b927f68b..1587d0d9295 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -374,8 +374,8 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
                         "%s(): cannot allocate memory for statistics; dev=%s.\n",
                         __func__, dev->name));
                 neigh_parms_release(&nd_tbl, ndev->nd_parms);
-                ndev->dead = 1;
-                in6_dev_finish_destroy(ndev);
+                dev_put(dev);
+                kfree(ndev);
                 return NULL;
         }
 
@@ -656,7 +656,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
          * layer address of our nexhop router
          */
 
-        if (rt->rt6i_nexthop == NULL)
+        if (dst_get_neighbour_raw(&rt->dst) == NULL)
                 ifa->flags &= ~IFA_F_OPTIMISTIC;
 
         ifa->idev = idev;
@@ -824,12 +824,13 @@ static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *i
 {
         struct inet6_dev *idev = ifp->idev;
         struct in6_addr addr, *tmpaddr;
-        unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp, age;
+        unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
         unsigned long regen_advance;
         int tmp_plen;
         int ret = 0;
         int max_addresses;
         u32 addr_flags;
+        unsigned long now = jiffies;
 
         write_lock(&idev->lock);
         if (ift) {
@@ -874,7 +875,7 @@ retry:
                 goto out;
         }
         memcpy(&addr.s6_addr[8], idev->rndid, 8);
-        age = (jiffies - ifp->tstamp) / HZ;
+        age = (now - ifp->tstamp) / HZ;
         tmp_valid_lft = min_t(__u32,
                               ifp->valid_lft,
                               idev->cnf.temp_valid_lft + age);
@@ -884,7 +885,6 @@ retry:
                                  idev->cnf.max_desync_factor);
         tmp_plen = ifp->prefix_len;
         max_addresses = idev->cnf.max_addresses;
-        tmp_cstamp = ifp->cstamp;
         tmp_tstamp = ifp->tstamp;
         spin_unlock_bh(&ifp->lock);
 
@@ -929,7 +929,7 @@ retry:
         ift->ifpub = ifp;
         ift->valid_lft = tmp_valid_lft;
         ift->prefered_lft = tmp_prefered_lft;
-        ift->cstamp = tmp_cstamp;
+        ift->cstamp = now;
         ift->tstamp = tmp_tstamp;
         spin_unlock_bh(&ift->lock);
 
@@ -1470,6 +1470,8 @@ void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
 {
         struct in6_addr addr;
+        if (ifp->prefix_len == 127) /* RFC 6164 */
+                return;
         ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
         if (ipv6_addr_any(&addr))
                 return;
@@ -1479,6 +1481,8 @@ static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
 {
         struct in6_addr addr;
+        if (ifp->prefix_len == 127) /* RFC 6164 */
+                return;
         ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
         if (ipv6_addr_any(&addr))
                 return;
@@ -1559,6 +1563,11 @@ static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
         return -1;
 }
 
+static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
+{
+        return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
+}
+
 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
 {
         switch (dev->type) {
@@ -1572,6 +1581,8 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
                 return addrconf_ifid_infiniband(eui, dev);
         case ARPHRD_SIT:
                 return addrconf_ifid_sit(eui, dev);
+        case ARPHRD_IPGRE:
+                return addrconf_ifid_gre(eui, dev);
         }
         return -1;
 }
@@ -1988,25 +1999,50 @@ ok:
 #ifdef CONFIG_IPV6_PRIVACY
                         read_lock_bh(&in6_dev->lock);
                         /* update all temporary addresses in the list */
-                        list_for_each_entry(ift, &in6_dev->tempaddr_list, tmp_list) {
-                                /*
-                                 * When adjusting the lifetimes of an existing
-                                 * temporary address, only lower the lifetimes.
-                                 * Implementations must not increase the
-                                 * lifetimes of an existing temporary address
-                                 * when processing a Prefix Information Option.
-                                 */
+                        list_for_each_entry(ift, &in6_dev->tempaddr_list,
+                                            tmp_list) {
+                                int age, max_valid, max_prefered;
+
                                 if (ifp != ift->ifpub)
                                         continue;
 
+                                /*
+                                 * RFC 4941 section 3.3:
+                                 * If a received option will extend the lifetime
+                                 * of a public address, the lifetimes of
+                                 * temporary addresses should be extended,
+                                 * subject to the overall constraint that no
+                                 * temporary addresses should ever remain
+                                 * "valid" or "preferred" for a time longer than
+                                 * (TEMP_VALID_LIFETIME) or
+                                 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
+                                 * respectively.
+                                 */
+                                age = (now - ift->cstamp) / HZ;
+                                max_valid = in6_dev->cnf.temp_valid_lft - age;
+                                if (max_valid < 0)
+                                        max_valid = 0;
+
+                                max_prefered = in6_dev->cnf.temp_prefered_lft -
+                                               in6_dev->cnf.max_desync_factor -
+                                               age;
+                                if (max_prefered < 0)
+                                        max_prefered = 0;
+
+                                if (valid_lft > max_valid)
+                                        valid_lft = max_valid;
+
+                                if (prefered_lft > max_prefered)
+                                        prefered_lft = max_prefered;
+
                                 spin_lock(&ift->lock);
                                 flags = ift->flags;
-                                if (ift->valid_lft > valid_lft &&
-                                    ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
-                                        ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
-                                if (ift->prefered_lft > prefered_lft &&
-                                    ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
-                                        ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
+                                ift->valid_lft = valid_lft;
+                                ift->prefered_lft = prefered_lft;
+                                ift->tstamp = now;
+                                if (prefered_lft > 0)
+                                        ift->flags &= ~IFA_F_DEPRECATED;
+
                                 spin_unlock(&ift->lock);
                                 if (!(flags&IFA_F_TENTATIVE))
                                         ipv6_ifa_notify(0, ift);
@@ -2014,9 +2050,11 @@ ok:
 
                         if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
                                 /*
-                                 * When a new public address is created as described in [ADDRCONF],
-                                 * also create a new temporary address. Also create a temporary
-                                 * address if it's enabled but no temporary address currently exists.
+                                 * When a new public address is created as
+                                 * described in [ADDRCONF], also create a new
+                                 * temporary address. Also create a temporary
+                                 * address if it's enabled but no temporary
+                                 * address currently exists.
                                  */
                                 read_unlock_bh(&in6_dev->lock);
                                 ipv6_create_tempaddr(ifp, NULL);
@@ -2423,6 +2461,29 @@ static void addrconf_sit_config(struct net_device *dev)
 }
 #endif
 
+#if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
+static void addrconf_gre_config(struct net_device *dev)
+{
+        struct inet6_dev *idev;
+        struct in6_addr addr;
+
+        pr_info("ipv6: addrconf_gre_config(%s)\n", dev->name);
+
+        ASSERT_RTNL();
+
+        if ((idev = ipv6_find_idev(dev)) == NULL) {
+                printk(KERN_DEBUG "init gre: add_dev failed\n");
+                return;
+        }
+
+        ipv6_addr_set(&addr,  htonl(0xFE800000), 0, 0, 0);
+        addrconf_prefix_route(&addr, 64, dev, 0, 0);
+
+        if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
+                addrconf_add_linklocal(idev, &addr);
+}
+#endif
+
 static inline int
 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
 {
@@ -2539,6 +2600,11 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
                         addrconf_sit_config(dev);
                         break;
 #endif
+#if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
+                case ARPHRD_IPGRE:
+                        addrconf_gre_config(dev);
+                        break;
+#endif
                 case ARPHRD_TUNNEL6:
                         addrconf_ip6_tnl_config(dev);
                         break;
@@ -4692,16 +4758,20 @@ int __init addrconf_init(void)
         if (err < 0)
                 goto errout_af;
 
-        err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo);
+        err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
+                              NULL);
         if (err < 0)
                 goto errout;
 
         /* Only the first call to __rtnl_register can fail */
-        __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL);
-        __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL);
-        __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr, inet6_dump_ifaddr);
-        __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
-        __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
+        __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
+        __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
+        __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
+                        inet6_dump_ifaddr, NULL);
+        __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
+                        inet6_dump_ifmcaddr, NULL);
+        __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
+                        inet6_dump_ifacaddr, NULL);
 
         ipv6_addr_label_rtnl_register();