X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Flinux%2Fskbuff.h;h=f93f22b3d2ffabf991c0f4f44c4d3f6076f4f4f3;hb=b3fba8da653999c67d7517050f196e92da6f8d3b;hp=9391e4a4c3447d53b73dba487255cab67ef24b6e;hpb=2f41fc806434f8466bb361570589a3f6099ca65d;p=firefly-linux-kernel-4.4.55.git

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 9391e4a4c344..f93f22b3d2ff 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -134,8 +134,8 @@ typedef struct skb_frag_struct skb_frag_t;
 
 struct skb_frag_struct {
 	struct page *page;
-	__u16 page_offset;
-	__u16 size;
+	__u32 page_offset;
+	__u32 size;
 };
 
 /* This data is invariant across clones and lives at
@@ -357,6 +357,7 @@ static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
 }
 
 extern void	       kfree_skbmem(struct sk_buff *skb);
+extern struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src);
 extern struct sk_buff *skb_clone(struct sk_buff *skb,
 				 gfp_t priority);
 extern struct sk_buff *skb_copy(const struct sk_buff *skb,
@@ -1352,6 +1353,22 @@ static inline int skb_clone_writable(struct sk_buff *skb, int len)
 	       skb_headroom(skb) + len <= skb->hdr_len;
 }
 
+static inline int __skb_cow(struct sk_buff *skb, unsigned int headroom,
+			    int cloned)
+{
+	int delta = 0;
+
+	if (headroom < NET_SKB_PAD)
+		headroom = NET_SKB_PAD;
+	if (headroom > skb_headroom(skb))
+		delta = headroom - skb_headroom(skb);
+
+	if (delta || cloned)
+		return pskb_expand_head(skb, ALIGN(delta, NET_SKB_PAD), 0,
+					GFP_ATOMIC);
+	return 0;
+}
+
 /**
  *	skb_cow - copy header of skb when it is required
  *	@skb: buffer to cow
@@ -1366,16 +1383,22 @@ static inline int skb_clone_writable(struct sk_buff *skb, int len)
  */
 static inline int skb_cow(struct sk_buff *skb, unsigned int headroom)
 {
-	int delta = (headroom > NET_SKB_PAD ? headroom : NET_SKB_PAD) -
-			skb_headroom(skb);
-
-	if (delta < 0)
-		delta = 0;
+	return __skb_cow(skb, headroom, skb_cloned(skb));
+}
 
-	if (delta || skb_cloned(skb))
-		return pskb_expand_head(skb, (delta + (NET_SKB_PAD-1)) &
-				~(NET_SKB_PAD-1), 0, GFP_ATOMIC);
-	return 0;
+/**
+ *	skb_cow_head - skb_cow but only making the head writable
+ *	@skb: buffer to cow
+ *	@headroom: needed headroom
+ *
+ *	This function is identical to skb_cow except that we replace the
+ *	skb_cloned check by skb_header_cloned.  It should be used when
+ *	you only need to push on some header and do not need to modify
+ *	the data.
+ */
+static inline int skb_cow_head(struct sk_buff *skb, unsigned int headroom)
+{
+	return __skb_cow(skb, headroom, skb_header_cloned(skb));
 }
 
 /**
@@ -1639,7 +1662,7 @@ static inline int skb_csum_unnecessary(const struct sk_buff *skb)
  *	if skb->ip_summed is CHECKSUM_UNNECESSARY which indicates that the
  *	hardware has already verified the correctness of the checksum.
  */
-static inline unsigned int skb_checksum_complete(struct sk_buff *skb)
+static inline __sum16 skb_checksum_complete(struct sk_buff *skb)
 {
 	return skb_csum_unnecessary(skb) ?
 	       0 : __skb_checksum_complete(skb);
@@ -1759,6 +1782,11 @@ static inline int skb_is_gso(const struct sk_buff *skb)
 	return skb_shinfo(skb)->gso_size;
 }
 
+static inline int skb_is_gso_v6(const struct sk_buff *skb)
+{
+	return skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6;
+}
+
 static inline void skb_forward_csum(struct sk_buff *skb)
 {
 	/* Unfortunately we don't support this one.  Any brave souls? */