linux-kernel - [RFC net-next 5/9] ice: apply XDP offloading fixup when building skb

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Date: Thu, 20 Jun 2024 15:19:22 -0700
From: Yan Zhai <yan@...udflare.com>
To: netdev@...r.kernel.org
Cc: Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Tony Nguyen <anthony.l.nguyen@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Björn Töpel <bjorn@...nel.org>,
	Magnus Karlsson <magnus.karlsson@...el.com>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	Jonathan Lemon <jonathan.lemon@...il.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: [RFC net-next 5/9] ice: apply XDP offloading fixup when building skb

Add a common point to transfer offloading info from XDP context to skb.

Signed-off-by: Yan Zhai <yan@...udflare.com>
Signed-off-by: Jesper Dangaard Brouer <hawk@...nel.org>
---
 drivers/net/ethernet/intel/ice/ice_txrx.c | 2 ++
 drivers/net/ethernet/intel/ice/ice_xsk.c  | 6 +++++-
 include/net/xdp_sock_drv.h                | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c
index 8bb743f78fcb..a247306837ed 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -1222,6 +1222,7 @@ int ice_clean_rx_irq(struct ice_rx_ring *rx_ring, int budget)
 
 			hard_start = page_address(rx_buf->page) + rx_buf->page_offset -
 				     offset;
+			xdp_init_buff_minimal(xdp);
 			xdp_prepare_buff(xdp, hard_start, offset, size, !!offset);
 #if (PAGE_SIZE > 4096)
 			/* At larger PAGE_SIZE, frame_sz depend on len size */
@@ -1287,6 +1288,7 @@ int ice_clean_rx_irq(struct ice_rx_ring *rx_ring, int budget)
 
 		/* populate checksum, VLAN, and protocol */
 		ice_process_skb_fields(rx_ring, rx_desc, skb);
+		xdp_buff_fixup_skb_offloading(xdp, skb);
 
 		ice_trace(clean_rx_irq_indicate, rx_ring, rx_desc, skb);
 		/* send completed skb up the stack */
diff --git a/drivers/net/ethernet/intel/ice/ice_xsk.c b/drivers/net/ethernet/intel/ice/ice_xsk.c
index a65955eb23c0..367658acaab8 100644
--- a/drivers/net/ethernet/intel/ice/ice_xsk.c
+++ b/drivers/net/ethernet/intel/ice/ice_xsk.c
@@ -845,8 +845,10 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring, int budget)
 	xdp_prog = READ_ONCE(rx_ring->xdp_prog);
 	xdp_ring = rx_ring->xdp_ring;
 
-	if (ntc != rx_ring->first_desc)
+	if (ntc != rx_ring->first_desc) {
 		first = *ice_xdp_buf(rx_ring, rx_ring->first_desc);
+		xdp_init_buff_minimal(first);
+	}
 
 	while (likely(total_rx_packets < (unsigned int)budget)) {
 		union ice_32b_rx_flex_desc *rx_desc;
@@ -920,6 +922,7 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring, int budget)
 			break;
 		}
 
+		xdp = first;
 		first = NULL;
 		rx_ring->first_desc = ntc;
 
@@ -934,6 +937,7 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring, int budget)
 		vlan_tci = ice_get_vlan_tci(rx_desc);
 
 		ice_process_skb_fields(rx_ring, rx_desc, skb);
+		xdp_buff_fixup_skb_offloading(xdp, skb);
 		ice_receive_skb(rx_ring, skb, vlan_tci);
 	}
 
diff --git a/include/net/xdp_sock_drv.h b/include/net/xdp_sock_drv.h
index 0a5dca2b2b3f..02243dc064c2 100644
--- a/include/net/xdp_sock_drv.h
+++ b/include/net/xdp_sock_drv.h
@@ -181,7 +181,7 @@ static inline void xsk_buff_set_size(struct xdp_buff *xdp, u32 size)
 	xdp->data = xdp->data_hard_start + XDP_PACKET_HEADROOM;
 	xdp->data_meta = xdp->data;
 	xdp->data_end = xdp->data + size;
-	xdp->flags = 0;
+	xdp_init_buff_minimal(xdp);
 }
 
 static inline dma_addr_t xsk_buff_raw_get_dma(struct xsk_buff_pool *pool,
-- 
2.30.2