[PATCH net-next v3 19/33] tun: add XDP frame size
flat view
STALE2362d
SUPERSEDED: 2 (1M)
From: Jesper Dangaard Brouer <hidden>
Date: 2020-05-08 11:10:40
Also in:
bpf
Subsystem:
networking drivers, the rest, tun/tap driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Willem de Bruijn, Jason Wang
Status: Superseded by v4 (posted 2020-05-14). [go to v4]
Revision v3 (4 revisions archived); 2 review trailers.
Revisions (4)
- v2 re-posted go to this post
- v1 [diff against previous]
- v3 current [diff against previous]
- v4 [diff against previous]
The tun driver have two code paths for running XDP (bpf_prog_run_xdp). In both cases 'buflen' contains enough tailroom for skb_shared_info. Cc: Jason Wang <redacted> Signed-off-by: Jesper Dangaard Brouer <redacted> Acked-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <redacted> --- drivers/net/tun.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 44889eba1dbc..c54f967e2c66 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c@@ -1671,6 +1671,7 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun, xdp_set_data_meta_invalid(&xdp); xdp.data_end = xdp.data + len; xdp.rxq = &tfile->xdp_rxq; + xdp.frame_sz = buflen; act = bpf_prog_run_xdp(xdp_prog, &xdp); if (act == XDP_REDIRECT || act == XDP_TX) {
@@ -2411,6 +2412,7 @@ static int tun_xdp_one(struct tun_struct *tun, } xdp_set_data_meta_invalid(xdp); xdp->rxq = &tfile->xdp_rxq; + xdp->frame_sz = buflen; act = bpf_prog_run_xdp(xdp_prog, xdp); err = tun_xdp_act(tun, xdp_prog, xdp, act);