From: David Wilder <[email protected]>
[ Upstream commit 413f142cc05cb03f2d1ea83388e40c1ddc0d74e9 ]
Ingress large send packets are identified by either:
The IBMVETH_RXQ_LRG_PKT flag in the receive buffer
or with a -1 placed in the ip header checksum.
The method used depends on firmware version. Frame
geometry and sufficient header validation is performed by the
hypervisor eliminating the need for further header checks here.
Fixes: 7b5967389f5a ("ibmveth: set correct gso_size and gso_type")
Signed-off-by: David Wilder <[email protected]>
Reviewed-by: Thomas Falcon <[email protected]>
Reviewed-by: Cristobal Forno <[email protected]>
Reviewed-by: Pradeep Satyanarayana <[email protected]>
Acked-by: Willem de Bruijn <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/ethernet/ibm/ibmveth.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1330,6 +1330,7 @@ static int ibmveth_poll(struct napi_stru
int offset = ibmveth_rxq_frame_offset(adapter);
int csum_good = ibmveth_rxq_csum_good(adapter);
int lrg_pkt = ibmveth_rxq_large_packet(adapter);
+ __sum16 iph_check = 0;
skb = ibmveth_rxq_get_buffer(adapter);
@@ -1366,7 +1367,17 @@ static int ibmveth_poll(struct napi_stru
skb_put(skb, length);
skb->protocol = eth_type_trans(skb, netdev);
- if (length > netdev->mtu + ETH_HLEN) {
+ /* PHYP without PLSO support places a -1 in the ip
+ * checksum for large send frames.
+ */
+ if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
+ struct iphdr *iph = (struct iphdr *)skb->data;
+
+ iph_check = iph->check;
+ }
+
+ if ((length > netdev->mtu + ETH_HLEN) ||
+ lrg_pkt || iph_check == 0xffff) {
ibmveth_rx_mss_helper(skb, mss, lrg_pkt);
adapter->rx_large_packets++;
}
