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 14fe940..3ae5393 100644 (file)
--- 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;