net: better IFF_XMIT_DST_RELEASE support

[linux-2.6-microblaze.git] / include / linux / netdevice.h

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 2df86f5..3a4315b 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1206,6 +1206,7 @@ enum netdev_priv_flags {
        IFF_SUPP_NOFCS                  = 1<<19,
        IFF_LIVE_ADDR_CHANGE            = 1<<20,
        IFF_MACVLAN                     = 1<<21,
+       IFF_XMIT_DST_RELEASE_PERM       = 1<<22,
 };
 
 #define IFF_802_1Q_VLAN                        IFF_802_1Q_VLAN
@@ -1230,6 +1231,7 @@ enum netdev_priv_flags {
 #define IFF_SUPP_NOFCS                 IFF_SUPP_NOFCS
 #define IFF_LIVE_ADDR_CHANGE           IFF_LIVE_ADDR_CHANGE
 #define IFF_MACVLAN                    IFF_MACVLAN
+#define IFF_XMIT_DST_RELEASE_PERM      IFF_XMIT_DST_RELEASE_PERM
 
 /**
  *     struct net_device - The DEVICE structure.
@@ -3588,6 +3590,12 @@ static inline bool netif_supports_nofcs(struct net_device *dev)
        return dev->priv_flags & IFF_SUPP_NOFCS;
 }
 
+/* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
+static inline void netif_keep_dst(struct net_device *dev)
+{
+       dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
+}
+
 extern struct pernet_operations __net_initdata loopback_net_ops;
 
 /* Logging, debugging and troubleshooting/diagnostic helpers. */