datapath: Provide compatibility for kernels up to 3.17

[cascardo/ovs.git] / datapath / linux / compat / include / linux / skbuff.h

diff --git a/datapath/linux/compat/include/linux/skbuff.h b/datapath/linux/compat/include/linux/skbuff.h
index cc2bf0e..18e75d6 100644 (file)
--- a/datapath/linux/compat/include/linux/skbuff.h
+++ b/datapath/linux/compat/include/linux/skbuff.h
@@ -3,8 +3,13 @@
 
 #include_next <linux/skbuff.h>
 
+#include <linux/jhash.h>
 #include <linux/version.h>
 
+#ifndef HAVE_IGNORE_DF_RENAME
+#define ignore_df local_df
+#endif
+
 #ifndef HAVE_SKB_COPY_FROM_LINEAR_DATA_OFFSET
 static inline void skb_copy_from_linear_data_offset(const struct sk_buff *skb,
                                                    const int offset, void *to,
@@ -243,27 +248,38 @@ static inline int skb_unclone(struct sk_buff *skb, gfp_t pri)
 }
 #endif
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3,6,0)
+#ifndef HAVE_SKB_ORPHAN_FRAGS
 static inline int skb_orphan_frags(struct sk_buff *skb, gfp_t gfp_mask)
 {
        return 0;
 }
-#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,6,0) */
+#endif
 
+#ifndef HAVE_SKB_GET_HASH
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0)
-#define __skb_get_rxhash rpl__skb_get_rxhash
-#define skb_get_rxhash rpl_skb_get_rxhash
+#define __skb_get_hash rpl__skb_get_rxhash
+#define skb_get_hash rpl_skb_get_rxhash
 
-extern u32 __skb_get_rxhash(struct sk_buff *skb);
-static inline __u32 skb_get_rxhash(struct sk_buff *skb)
+extern u32 __skb_get_hash(struct sk_buff *skb);
+static inline __u32 skb_get_hash(struct sk_buff *skb)
 {
 #ifdef HAVE_RXHASH
        if (skb->rxhash)
+#ifndef HAVE_U16_RXHASH
                return skb->rxhash;
+#else
+               return jhash_1word(skb->rxhash, 0);
 #endif
-       return __skb_get_rxhash(skb);
+#endif
+       return __skb_get_hash(skb);
 }
 
+#else
+#define skb_get_hash skb_get_rxhash
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0) */
+#endif /* HAVE_SKB_GET_HASH */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0)
 static inline void skb_tx_error(struct sk_buff *skb)
 {
        return;
@@ -276,6 +292,17 @@ int skb_zerocopy(struct sk_buff *to, struct sk_buff *from, int len,
                  int hlen);
 #endif
 
+#ifndef HAVE_SKB_CLEAR_HASH
+static inline void skb_clear_hash(struct sk_buff *skb)
+{
+#ifdef HAVE_RXHASH
+       skb->rxhash = 0;
+#endif
+#ifdef HAVE_L4_RXHASH
+       skb->l4_rxhash = 0;
+#endif
+}
+#endif
 
 #ifndef HAVE_SKB_HAS_FRAG_LIST
 #define skb_has_frag_list skb_has_frags