Introduce convert_to_xdp_buff utility routine to initialize xdp_buff
fields from xdp_frames ones. Rely on convert_to_xdp_buff in veth xdp
code
Suggested-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
Changes since v1:
- rely on frame->data pointer to compute xdp->data_hard_start one
---
drivers/net/veth.c | 6 +-----
include/net/xdp.h | 10 ++++++++++
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index b586d2fa5551..9f91e79b7823 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -575,11 +575,7 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
struct xdp_buff xdp;
u32 act;
- xdp.data_hard_start = hard_start;
- xdp.data = frame->data;
- xdp.data_end = frame->data + frame->len;
- xdp.data_meta = frame->data - frame->metasize;
- xdp.frame_sz = frame->frame_sz;
+ convert_to_xdp_buff(frame, &xdp);
xdp.rxq = &rq->xdp_rxq;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
diff --git a/include/net/xdp.h b/include/net/xdp.h
index 90f11760bd12..df99d5d267b2 100644
--- a/include/net/xdp.h
+++ b/include/net/xdp.h
@@ -106,6 +106,16 @@ void xdp_warn(const char *msg, const char *func, const int line);
struct xdp_frame *xdp_convert_zc_to_xdp_frame(struct xdp_buff *xdp);
+static inline
+void convert_to_xdp_buff(struct xdp_frame *frame, struct xdp_buff *xdp)
+{
+ xdp->data_hard_start = frame->data - frame->headroom - sizeof(*frame);
+ xdp->data = frame->data;
+ xdp->data_end = frame->data + frame->len;
+ xdp->data_meta = frame->data - frame->metasize;
+ xdp->frame_sz = frame->frame_sz;
+}
+
/* Convert xdp_buff to xdp_frame */
static inline
struct xdp_frame *convert_to_xdp_frame(struct xdp_buff *xdp)
--
2.26.2
