netdev - [bpf-next V1 PATCH 2/8] i40e: implement flush flag for ndo_xdp

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Date:   Wed, 30 May 2018 20:00:43 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     netdev@...r.kernel.org, Daniel Borkmann <borkmann@...earbox.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     John Fastabend <john.fastabend@...il.com>,
        makita.toshiaki@....ntt.co.jp
Subject: [bpf-next V1 PATCH 2/8] i40e: implement flush flag for ndo_xdp_xmit

Signed-off-by: Jesper Dangaard Brouer <brouer@...hat.com>
---
 drivers/net/ethernet/intel/i40e/i40e_txrx.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index c0451d6e0790..03c1446f0465 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -3685,7 +3685,7 @@ int i40e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
 	if (!i40e_enabled_xdp_vsi(vsi) || queue_index >= vsi->num_queue_pairs)
 		return -ENXIO;
 
-	if (unlikely(flags & ~XDP_XMIT_FLAGS_NONE))
+	if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
 		return -EINVAL;
 
 	for (i = 0; i < n; i++) {
@@ -3699,6 +3699,9 @@ int i40e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
 		}
 	}
 
+	if (unlikely(flags & XDP_XMIT_FLUSH))
+		i40e_xdp_ring_update_tail(vsi->xdp_rings[queue_index]);
+
 	return n - drops;
 }