tun: remove ndo_xdp_flush call tun_xdp_flush
Remove the ndo_xdp_flush call implementation tun_xdp_flush
as no callers of ndo_xdp_flush are left.
The tun drivers XDP_TX implementation also used tun_xdp_flush (and
tun_xdp_xmit). This is easily solved by passing the XDP_XMIT_FLUSH
flag to tun_xdp_xmit in tun_xdp_tx.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index d82a05f..ef09224 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1347,26 +1347,7 @@ static int tun_xdp_tx(struct net_device *dev, struct xdp_buff *xdp)
if (unlikely(!frame))
return -EOVERFLOW;
- return tun_xdp_xmit(dev, 1, &frame, 0);
-}
-
-static void tun_xdp_flush(struct net_device *dev)
-{
- struct tun_struct *tun = netdev_priv(dev);
- struct tun_file *tfile;
- u32 numqueues;
-
- rcu_read_lock();
-
- numqueues = READ_ONCE(tun->numqueues);
- if (!numqueues)
- goto out;
-
- tfile = rcu_dereference(tun->tfiles[smp_processor_id() %
- numqueues]);
- __tun_xdp_flush_tfile(tfile);
-out:
- rcu_read_unlock();
+ return tun_xdp_xmit(dev, 1, &frame, XDP_XMIT_FLUSH);
}
static const struct net_device_ops tap_netdev_ops = {
@@ -1387,7 +1368,6 @@ static const struct net_device_ops tap_netdev_ops = {
.ndo_get_stats64 = tun_net_get_stats64,
.ndo_bpf = tun_xdp,
.ndo_xdp_xmit = tun_xdp_xmit,
- .ndo_xdp_flush = tun_xdp_flush,
};
static void tun_flow_init(struct tun_struct *tun)
@@ -1706,7 +1686,6 @@ static struct sk_buff *tun_build_skb(struct tun_struct *tun,
alloc_frag->offset += buflen;
if (tun_xdp_tx(tun->dev, &xdp))
goto err_redirect;
- tun_xdp_flush(tun->dev);
rcu_read_unlock();
preempt_enable();
return NULL;