[PATCH] kni: fix build with Linux kernel 4.1 or later

[Stephen Hemminger <stephen@networkplumber.org>]

From: Stephen Hemminger <shemming@brocade.com>

The internal API for some functions used by KNI changes in current
kernel. KNI really needs to be submitted upstream (by Intel)
to keep it maintainable.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c | 12 +++++++++++-
 lib/librte_eal/linuxapp/kni/kni_net.c              |  6 ++++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c b/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c
index fa24d16..62fb53b 100644
--- a/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c
+++ b/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c
@@ -2250,10 +2250,16 @@ static int igb_ndo_bridge_setlink(struct net_device *dev,
 }
 
 #ifdef HAVE_BRIDGE_FILTER
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
 static int igb_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 				  struct net_device *dev, u32 filter_mask)
 #else
 static int igb_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
+				  struct net_device *dev,
+				  u32 filter_mask, int nlflags)
+#endif
+#else
+static int igb_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 				  struct net_device *dev)
 #endif
 {
@@ -2269,7 +2275,11 @@ static int igb_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 		mode = BRIDGE_MODE_VEPA;
 
 #ifdef HAVE_NDO_FDB_ADD_VID
-	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
+	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, nl_flags);
+#else
+	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0, 0);
+#endif
 #else
 	return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode);
 #endif /* HAVE_NDO_FDB_ADD_VID */
diff --git a/lib/librte_eal/linuxapp/kni/kni_net.c b/lib/librte_eal/linuxapp/kni/kni_net.c
index e34a0fd..e29caeb 100644
--- a/lib/librte_eal/linuxapp/kni/kni_net.c
+++ b/lib/librte_eal/linuxapp/kni/kni_net.c
@@ -601,7 +601,7 @@ kni_net_header(struct sk_buff *skb, struct net_device *dev,
 	return dev->hard_header_len;
 }
 
-
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
 /*
  * Re-fill the eth header
  */
@@ -616,6 +616,7 @@ kni_net_rebuild_header(struct sk_buff *skb)
 
 	return 0;
 }
+#endif
 
 /**
  * kni_net_set_mac - Change the Ethernet Address of the KNI NIC
@@ -646,8 +647,9 @@ static int kni_net_change_carrier(struct net_device *dev, bool new_carrier)
 
 static const struct header_ops kni_net_header_ops = {
 	.create  = kni_net_header,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0)
 	.rebuild = kni_net_rebuild_header,
-	.cache   = NULL,  /* disable caching */
+#endif
 };
 
 static const struct net_device_ops kni_net_netdev_ops = {
-- 
2.1.4