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authorTom Herbert <tom@herbertland.com>2015-04-20 14:10:04 -0700
committerDavid S. Miller <davem@davemloft.net>2015-04-20 21:57:26 -0400
commit4e18b9adf2f910ec4d30b811a74a5b626e6c6125 (patch)
tree59a9b374ff9be0d2fba7c4e8f3eb7a921c1d0cdf
parenta068833bbf0ede9203410f8fd186178c758ade9b (diff)
net: add skb_checksum_complete_unset
This function changes ip_summed to CHECKSUM_NONE if CHECKSUM_COMPLETE is set. This is called to discard checksum-complete when packet is being modified and checksum is not pulled for headers in a layer. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/skbuff.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 0991259643d6..06793b598f44 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3016,6 +3016,18 @@ static inline bool __skb_checksum_validate_needed(struct sk_buff *skb,
*/
#define CHECKSUM_BREAK 76
+/* Unset checksum-complete
+ *
+ * Unset checksum complete can be done when packet is being modified
+ * (uncompressed for instance) and checksum-complete value is
+ * invalidated.
+ */
+static inline void skb_checksum_complete_unset(struct sk_buff *skb)
+{
+ if (skb->ip_summed == CHECKSUM_COMPLETE)
+ skb->ip_summed = CHECKSUM_NONE;
+}
+
/* Validate (init) checksum based on checksum complete.
*
* Return values: