From: Jason Wang <jasowang@redhat.com>
Date: Wed, 12 Sep 2018 03:17:05 +0000 (+0800)
Subject: tuntap: move XDP flushing out of tun_do_xdp()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1a097910adda6b3328fc235575bba0e9ee408492;p=linux.git

tuntap: move XDP flushing out of tun_do_xdp()

This will allow adding batch flushing on top.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 14fe94098180d..3ae539374f6bb 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1660,7 +1660,6 @@ static int tun_xdp_act(struct tun_struct *tun, struct bpf_prog *xdp_prog,
 	switch (act) {
 	case XDP_REDIRECT:
 		err = xdp_do_redirect(tun->dev, xdp, xdp_prog);
-		xdp_do_flush_map();
 		if (err)
 			return err;
 		break;
@@ -1749,6 +1748,8 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun,
 		err = tun_xdp_act(tun, xdp_prog, &xdp, act);
 		if (err < 0)
 			goto err_xdp;
+		if (err == XDP_REDIRECT)
+			xdp_do_flush_map();
 		if (err != XDP_PASS)
 			goto out;