netdev - [PATCH net-next RFC v1 3/4] veth: lift skb_head_is

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Date: Tue, 22 Aug 2023 19:59:20 +0200
From: Jesper Dangaard Brouer <hawk@...nel.org>
To: netdev@...r.kernel.org, edumazet@...gle.com
Cc: Jesper Dangaard Brouer <hawk@...nel.org>, pabeni@...hat.com,
 kuba@...nel.org, davem@...emloft.net, lorenzo@...nel.org,
 Ilias Apalodimas <ilias.apalodimas@...aro.org>, mtahhan@...hat.com,
 huangjie.albert@...edance.com, Yunsheng Lin <linyunsheng@...wei.com>,
 Liang Chen <liangchen.linux@...il.com>
Subject: [PATCH net-next RFC v1 3/4] veth: lift skb_head_is_locked restriction
 for SKB based XDP

As veth_xdp_rcv_skb() no-longer steals SKB data and no-longer uses
XDP native xdp_do_redirect(), then it is possible to handle
more types of SKBs with other memory types.

Replacing skb_head_is_locked() with skb_cloned().

Signed-off-by: Jesper Dangaard Brouer <hawk@...nel.org>
---
 drivers/net/veth.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 192547035194..8e117cc44fda 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -720,7 +720,7 @@ static int veth_convert_skb_to_xdp_buff(struct veth_rq *rq,
 	struct sk_buff *skb = *pskb;
 	u32 frame_sz;
 
-	if (skb_shared(skb) || skb_head_is_locked(skb) ||
+	if (skb_shared(skb) || skb_cloned(skb) ||
 	    skb_shinfo(skb)->nr_frags ||
 	    skb_headroom(skb) < XDP_PACKET_HEADROOM) {
 		u32 size, len, max_head_size, off;