diff mbox series

[RFC,v1,13/15] tun: add XDP frame size

Message ID 158446621378.702578.2512691726801096724.stgit@firesoul
State RFC
Delegated to: BPF Maintainers
Headers show
Series XDP extend with knowledge of frame size | expand

Commit Message

Jesper Dangaard Brouer March 17, 2020, 5:30 p.m. UTC 
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 <brouer@redhat.com>
---
 drivers/net/tun.c |    2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

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);