From fb3e6e9307973d2f70a173f1b33d1054fa2b691f Mon Sep 17 00:00:00 2001 From: Jesper Dangaard Brouer Date: Thu, 14 May 2020 12:50:34 +0200 Subject: tun: Add XDP frame size 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 Signed-off-by: Alexei Starovoitov Acked-by: Michael S. Tsirkin Acked-by: Jason Wang Link: https://lore.kernel.org/bpf/158945343419.97035.9594485183958037621.stgit@firesoul --- drivers/net/tun.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/net/tun.c') 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); -- cgit v1.2.3