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-rw-r--r--include/linux/skbuff.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index acece7ce376f..a8fc2220e8ce 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2161,6 +2161,11 @@ static inline int skb_checksum_start_offset(const struct sk_buff *skb)
return skb->csum_start - skb_headroom(skb);
}
+static inline unsigned char *skb_checksum_start(const struct sk_buff *skb)
+{
+ return skb->head + skb->csum_start;
+}
+
static inline int skb_transport_offset(const struct sk_buff *skb)
{
return skb_transport_header(skb) - skb->data;
@@ -3576,6 +3581,16 @@ static inline int gso_pskb_expand_head(struct sk_buff *skb, int extra)
return 0;
}
+static inline void gso_reset_checksum(struct sk_buff *skb, __wsum res)
+{
+ /* Do not update partial checksums if remote checksum is enabled. */
+ if (skb->remcsum_offload)
+ return;
+
+ SKB_GSO_CB(skb)->csum = res;
+ SKB_GSO_CB(skb)->csum_start = skb_checksum_start(skb) - skb->head;
+}
+
/* Compute the checksum for a gso segment. First compute the checksum value
* from the start of transport header to SKB_GSO_CB(skb)->csum_start, and
* then add in skb->csum (checksum from csum_start to end of packet).