datapath: Check for backported skb_orphan_frags().

[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 a5f8702..714c955 100644 (file)
--- a/datapath/linux/compat/include/linux/skbuff.h
+++ b/datapath/linux/compat/include/linux/skbuff.h
@@ -194,6 +194,34 @@ static inline struct page *skb_frag_page(const skb_frag_t *frag)
 {
        return frag->page;
 }
+
+static inline void __skb_frag_set_page(skb_frag_t *frag, struct page *page)
+{
+       frag->page = page;
+}
+static inline void skb_frag_size_set(skb_frag_t *frag, unsigned int size)
+{
+       frag->size = size;
+}
+static inline void __skb_frag_ref(skb_frag_t *frag)
+{
+       get_page(skb_frag_page(frag));
+}
+static inline void __skb_frag_unref(skb_frag_t *frag)
+{
+       put_page(skb_frag_page(frag));
+}
+
+static inline void skb_frag_ref(struct sk_buff *skb, int f)
+{
+       __skb_frag_ref(&skb_shinfo(skb)->frags[f]);
+}
+
+static inline void skb_frag_unref(struct sk_buff *skb, int f)
+{
+       __skb_frag_unref(&skb_shinfo(skb)->frags[f]);
+}
+
 #endif
 
 #ifndef HAVE_SKB_RESET_MAC_LEN
@@ -215,6 +243,13 @@ static inline int skb_unclone(struct sk_buff *skb, gfp_t pri)
 }
 #endif
 
+#ifndef HAVE_SKB_ORPHAN_FRAGS
+static inline int skb_orphan_frags(struct sk_buff *skb, gfp_t gfp_mask)
+{
+       return 0;
+}
+#endif
+
 #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
@@ -228,12 +263,34 @@ static inline __u32 skb_get_rxhash(struct sk_buff *skb)
 #endif
        return __skb_get_rxhash(skb);
 }
-#endif
+
+static inline void skb_tx_error(struct sk_buff *skb)
+{
+       return;
+}
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0) */
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
 unsigned int skb_zerocopy_headlen(const struct sk_buff *from);
-void skb_zerocopy(struct sk_buff *to, const struct sk_buff *from, int len, 
+int skb_zerocopy(struct sk_buff *to, struct sk_buff *from, int len,
                  int hlen);
 #endif
 
+
+#ifndef HAVE_SKB_HAS_FRAG_LIST
+#define skb_has_frag_list skb_has_frags
+#endif
+
+#ifndef HAVE___SKB_FILL_PAGE_DESC
+static inline void __skb_fill_page_desc(struct sk_buff *skb, int i,
+                                       struct page *page, int off, int size)
+{
+       skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
+       __skb_frag_set_page(frag, page);
+       frag->page_offset       = off;
+       skb_frag_size_set(frag, size);
+}
+#endif
+
 #endif