openvswitch: more accurate checksumming in queue_userspace_packet()

if skb carries an SCTP packet and ip_summed is CHECKSUM_PARTIAL, it needs
CRC32c in place of Internet Checksum: use skb_csum_hwoffload_help to avoid
corrupting such packets while queueing them towards userspace.

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 7b17da9a94a0c15ab8ec28205e025d9554c798fb..9ddc9f8412a277badcba160d89b5343c2c80780a 100644 (file)
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -453,7 +453,7 @@ static int queue_userspace_packet(struct datapath *dp, struct sk_buff *skb,
 
        /* Complete checksum if needed */
        if (skb->ip_summed == CHECKSUM_PARTIAL &&
-           (err = skb_checksum_help(skb)))
+           (err = skb_csum_hwoffload_help(skb, 0)))
                goto out;
 
        /* Older versions of OVS user space enforce alignment of the last