[PATCH RFC bpf-next 08/15] xsk: Call skb_metadata_set when skb->data points at metadata end
From: Jakub Sitnicki <jakub@cloudflare.com>
Date: 2025-11-24 16:29:21
Also in:
bpf
Subsystem:
networking [general], the rest, xdp (express data path) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Alexei Starovoitov, Daniel Borkmann, David S. Miller, Jesper Dangaard Brouer, John Fastabend
Prepare to track skb metadata location independently of MAC header offset. Following changes will make skb_metadata_set() record where metadata ends relative to skb->head. Hence the helper must be called when skb->data already points past the metadata area. Adjust AF_XDP to pull from skb->data before calling skb_metadata_set(). Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> --- net/core/xdp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/xdp.c b/net/core/xdp.c
index 9100e160113a..e86ac1d6ad6d 100644
--- a/net/core/xdp.c
+++ b/net/core/xdp.c@@ -768,8 +768,8 @@ struct sk_buff *xdp_build_skb_from_zc(struct xdp_buff *xdp) metalen = xdp->data - xdp->data_meta; if (metalen > 0) { - skb_metadata_set(skb, metalen); __skb_pull(skb, metalen); + skb_metadata_set(skb, metalen); } skb_record_rx_queue(skb, rxq->queue_index);
--
2.43.0