[dpdk-dev] [PATCH] kni: add support for older kernels

[Ferruh Yigit <ferruh.yigit@intel.com>]

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
 lib/librte_eal/linuxapp/kni/compat.h                | 13 +++++++++++++
 lib/librte_eal/linuxapp/kni/ethtool/igb/kcompat.h   | 13 +++++++++++++
 lib/librte_eal/linuxapp/kni/ethtool/ixgbe/kcompat.h | 12 ++++++++++++
 3 files changed, 38 insertions(+)

diff --git a/lib/librte_eal/linuxapp/kni/compat.h b/lib/librte_eal/linuxapp/kni/compat.h
index 647ba3c..962a4e7 100644
--- a/lib/librte_eal/linuxapp/kni/compat.h
+++ b/lib/librte_eal/linuxapp/kni/compat.h
@@ -38,3 +38,16 @@
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
 #define HAVE_TRANS_START_HELPER
 #endif
+
+/*
+ * KNI uses NET_NAME_UNKNOWN macro to select correct version of alloc_netdev()
+ * For old kernels just backported the commit that enables the macro
+ * (685343fc3ba6) but still uses old API, it is required to undefine macro to
+ * select correct version of API, this is safe since KNI doesn't use the value.
+ * This fix is specific to RedHat/CentOS kernels.
+ */
+#if (defined(RHEL_RELEASE_CODE) && \
+	(RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 8)) && \
+	(LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)))
+#undef NET_NAME_UNKNOWN
+#endif
diff --git a/lib/librte_eal/linuxapp/kni/ethtool/igb/kcompat.h b/lib/librte_eal/linuxapp/kni/ethtool/igb/kcompat.h
index bdd0806..25ac41b 100644
--- a/lib/librte_eal/linuxapp/kni/ethtool/igb/kcompat.h
+++ b/lib/librte_eal/linuxapp/kni/ethtool/igb/kcompat.h
@@ -3915,4 +3915,17 @@ skb_set_hash(struct sk_buff *skb, __u32 hash, __always_unused int type)
 /* ndo_bridge_getlink adds new filter_mask and vlan_fill parameters */
 #define HAVE_NDO_BRIDGE_GETLINK_FILTER_MASK_VLAN_FILL
 #endif /* >= 4.2.0 */
+
+/*
+ * vlan_tx_tag_* macros renamed to skb_vlan_tag_* (Linux commit: df8a39defad4)
+ * For older kernels backported this commit, need to use renamed functions.
+ * This fix is specific to RedHat/CentOS kernels.
+ */
+#if (defined(RHEL_RELEASE_CODE) && \
+	(RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 8)) && \
+	(LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)))
+#define vlan_tx_tag_get skb_vlan_tag_get
+#define vlan_tx_tag_present skb_vlan_tag_present
+#endif
+
 #endif /* _KCOMPAT_H_ */
diff --git a/lib/librte_eal/linuxapp/kni/ethtool/ixgbe/kcompat.h b/lib/librte_eal/linuxapp/kni/ethtool/ixgbe/kcompat.h
index 6676d6b..6ce0239 100644
--- a/lib/librte_eal/linuxapp/kni/ethtool/ixgbe/kcompat.h
+++ b/lib/librte_eal/linuxapp/kni/ethtool/ixgbe/kcompat.h
@@ -3140,4 +3140,16 @@ static inline int __kc_pci_vfs_assigned(struct pci_dev *dev)
 #define SET_ETHTOOL_OPS(netdev, ops) ((netdev)->ethtool_ops = (ops))
 #endif /* >= 3.16.0 */
 
+/*
+ * vlan_tx_tag_* macros renamed to skb_vlan_tag_* (Linux commit: df8a39defad4)
+ * For older kernels backported this commit, need to use renamed functions.
+ * This fix is specific to RedHat/CentOS kernels.
+ */
+#if (defined(RHEL_RELEASE_CODE) && \
+	RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 8) && \
+	LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34))
+#define vlan_tx_tag_get skb_vlan_tag_get
+#define vlan_tx_tag_present skb_vlan_tag_present
+#endif
+
 #endif /* _KCOMPAT_H_ */
-- 
2.7.4