[PATCH bpf-next v3 09/17] xdp: Call skb_metadata_set when skb->data points at metadata end
From: Jakub Sitnicki <jakub@cloudflare.com>
Date: 2026-01-07 14:28:22
Also in:
bpf
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 points just past the metadata area. Tweak XDP generic mode accordingly. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> --- net/core/dev.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 9094c0fb8c68..7f984d86dfe9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c@@ -5467,8 +5467,11 @@ u32 bpf_prog_run_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp, break; case XDP_PASS: metalen = xdp->data - xdp->data_meta; - if (metalen) + if (metalen) { + __skb_push(skb, mac_len); skb_metadata_set(skb, metalen); + __skb_pull(skb, mac_len); + } break; }
--
2.43.0