[PATCH RFC v1 13/15] tun: add XDP frame size
From: Jesper Dangaard Brouer <hidden>
Date: 2020-03-17 17:30:42
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
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. Signed-off-by: Jesper Dangaard Brouer <redacted> --- drivers/net/tun.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 79f248cb282d..c540ff2f5774 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c@@ -1706,6 +1706,7 @@ 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) {
@@ -2445,6 +2446,7 @@ 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);