Re: [PATCH bpf-next v4 10/15] net/mlx4_en: Introduce wrapper for xdp_buff

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On 12/13/2022 4:36 AM, Stanislav Fomichev wrote:
No functional changes. Boilerplate to allow stuffing more data after xdp_buff.

Cc: Tariq Toukan <tariqt@xxxxxxxxxx>
Cc: John Fastabend <john.fastabend@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Martin KaFai Lau <martin.lau@xxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Willem de Bruijn <willemb@xxxxxxxxxx>
Cc: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Cc: Anatoly Burakov <anatoly.burakov@xxxxxxxxx>
Cc: Alexander Lobakin <alexandr.lobakin@xxxxxxxxx>
Cc: Magnus Karlsson <magnus.karlsson@xxxxxxxxx>
Cc: Maryam Tahhan <mtahhan@xxxxxxxxxx>
Cc: xdp-hints@xxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
Signed-off-by: Stanislav Fomichev <sdf@xxxxxxxxxx>
---
  drivers/net/ethernet/mellanox/mlx4/en_rx.c | 26 +++++++++++++---------
  1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 8f762fc170b3..014a80af2813 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -661,9 +661,14 @@ static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va,
  #define MLX4_CQE_STATUS_IP_ANY (MLX4_CQE_STATUS_IPV4)
  #endif
+struct mlx4_en_xdp_buff {
+	struct xdp_buff xdp;
+};
+
  int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget)
  {
  	struct mlx4_en_priv *priv = netdev_priv(dev);
+	struct mlx4_en_xdp_buff mxbuf = {};
  	int factor = priv->cqe_factor;
  	struct mlx4_en_rx_ring *ring;
  	struct bpf_prog *xdp_prog;
@@ -671,7 +676,6 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
  	bool doorbell_pending;
  	bool xdp_redir_flush;
  	struct mlx4_cqe *cqe;
-	struct xdp_buff xdp;
  	int polled = 0;
  	int index;
@@ -681,7 +685,7 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
  	ring = priv->rx_ring[cq_ring];
xdp_prog = rcu_dereference_bh(ring->xdp_prog);
-	xdp_init_buff(&xdp, priv->frag_info[0].frag_stride, &ring->xdp_rxq);
+	xdp_init_buff(&mxbuf.xdp, priv->frag_info[0].frag_stride, &ring->xdp_rxq);
  	doorbell_pending = false;
  	xdp_redir_flush = false;
@@ -776,24 +780,24 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
  						priv->frag_info[0].frag_size,
  						DMA_FROM_DEVICE);
- xdp_prepare_buff(&xdp, va - frags[0].page_offset,
+			xdp_prepare_buff(&mxbuf.xdp, va - frags[0].page_offset,
  					 frags[0].page_offset, length, false);
-			orig_data = xdp.data;
+			orig_data = mxbuf.xdp.data;
- act = bpf_prog_run_xdp(xdp_prog, &xdp);
+			act = bpf_prog_run_xdp(xdp_prog, &mxbuf.xdp);
- length = xdp.data_end - xdp.data;
-			if (xdp.data != orig_data) {
-				frags[0].page_offset = xdp.data -
-					xdp.data_hard_start;
-				va = xdp.data;
+			length = mxbuf.xdp.data_end - mxbuf.xdp.data;
+			if (mxbuf.xdp.data != orig_data) {
+				frags[0].page_offset = mxbuf.xdp.data -
+					mxbuf.xdp.data_hard_start;
+				va = mxbuf.xdp.data;
  			}
switch (act) {
  			case XDP_PASS:
  				break;
  			case XDP_REDIRECT:
-				if (likely(!xdp_do_redirect(dev, &xdp, xdp_prog))) {
+				if (likely(!xdp_do_redirect(dev, &mxbuf.xdp, xdp_prog))) {
  					ring->xdp_redirect++;
  					xdp_redir_flush = true;
  					frags[0].page = NULL;

Thanks for your patches.

Reviewed-by: Tariq Toukan <tariqt@xxxxxxxxxx>



[Index of Archives]     [Linux Samsung SoC]     [Linux Rockchip SoC]     [Linux Actions SoC]     [Linux for Synopsys ARC Processors]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]


  Powered by Linux