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xdp: Introduce xdp_convert_frame_to_buff utility routine

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Introduce xdp_convert_frame_to_buff utility routine to initialize xdp_buff
fields from xdp_frames ones. Rely on xdp_convert_frame_to_buff in veth xdp
code.

Suggested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/87acf133073c4b2d4cbb8097e8c2480c0a0fac32.1590698295.git.lorenzo@kernel.org
This commit is contained in:
Lorenzo Bianconi
2020-05-28 22:47:28 +02:00
committed by Alexei Starovoitov
parent c48a24f00e
commit fc37987265
2 changed files with 11 additions and 5 deletions
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10
include/net/xdp.h
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@@ -111,6 +111,16 @@ 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 xdp_convert_frame_to_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)