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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>
This commit is contained in:
Jesper Dangaard Brouer 2018-06-05 13:55:45 +02:00 committed by Daniel Borkmann
parent 16ec025aa5
commit 42421a5654
1 changed files with 1 additions and 22 deletions
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23
drivers/net/tun.c
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@ -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;