net: track link-status of ipv4 nexthops

[karo-tx-linux.git] / net / ipv4 / fib_frontend.c

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 872494e6e6eb7996185a99a8b05915f861a73ec4..534eb148504575e9756df206e2e5184f45aea643 100644 (file)
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -1063,9 +1063,9 @@ static void nl_fib_lookup_exit(struct net *net)
        net->ipv4.fibnl = NULL;
 }
 
-static void fib_disable_ip(struct net_device *dev, int force)
+static void fib_disable_ip(struct net_device *dev, unsigned long event)
 {
-       if (fib_sync_down_dev(dev, force))
+       if (fib_sync_down_dev(dev, event))
                fib_flush(dev_net(dev));
        rt_cache_flush(dev_net(dev));
        arp_ifdown(dev);
@@ -1081,7 +1081,7 @@ static int fib_inetaddr_event(struct notifier_block *this, unsigned long event,
        case NETDEV_UP:
                fib_add_ifaddr(ifa);
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
-               fib_sync_up(dev);
+               fib_sync_up(dev, RTNH_F_DEAD);
 #endif
                atomic_inc(&net->ipv4.dev_addr_genid);
                rt_cache_flush(dev_net(dev));
@@ -1093,7 +1093,7 @@ static int fib_inetaddr_event(struct notifier_block *this, unsigned long event,
                        /* Last address was deleted from this interface.
                         * Disable IP.
                         */
-                       fib_disable_ip(dev, 1);
+                       fib_disable_ip(dev, event);
                } else {
                        rt_cache_flush(dev_net(dev));
                }
@@ -1107,9 +1107,10 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo
        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
        struct in_device *in_dev;
        struct net *net = dev_net(dev);
+       unsigned int flags;
 
        if (event == NETDEV_UNREGISTER) {
-               fib_disable_ip(dev, 2);
+               fib_disable_ip(dev, event);
                rt_flush_dev(dev);
                return NOTIFY_DONE;
        }
@@ -1124,16 +1125,22 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo
                        fib_add_ifaddr(ifa);
                } endfor_ifa(in_dev);
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
-               fib_sync_up(dev);
+               fib_sync_up(dev, RTNH_F_DEAD);
 #endif
                atomic_inc(&net->ipv4.dev_addr_genid);
                rt_cache_flush(net);
                break;
        case NETDEV_DOWN:
-               fib_disable_ip(dev, 0);
+               fib_disable_ip(dev, event);
                break;
-       case NETDEV_CHANGEMTU:
        case NETDEV_CHANGE:
+               flags = dev_get_flags(dev);
+               if (flags & (IFF_RUNNING | IFF_LOWER_UP))
+                       fib_sync_up(dev, RTNH_F_LINKDOWN);
+               else
+                       fib_sync_down_dev(dev, event);
+               /* fall through */
+       case NETDEV_CHANGEMTU:
                rt_cache_flush(net);
                break;
        }