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xsk: do not return EMSGSIZE in copy mode for packets larger than MTU

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This patch stops returning EMSGSIZE from sendmsg in copy mode when the
size of the packet is larger than the MTU. Just send it to the device
so that it will drop it as in zero-copy mode. This makes the error
reporting consistent between copy mode and zero-copy mode.

Fixes: 35fcde7f8d ("xsk: support for Tx")
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Magnus Karlsson 2018-07-11 10:12:52 +02:00 committed by Daniel Borkmann
parent 6efb4436f7
commit 09210c4bcc
1 changed files with 1 additions and 6 deletions
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7
net/xdp/xsk.c
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@ -233,15 +233,10 @@ static int xsk_generic_xmit(struct sock *sk, struct msghdr *m,
if (xskq_reserve_addr(xs->umem->cq))
goto out;
len = desc.len;
if (unlikely(len > xs->dev->mtu)) {
err = -EMSGSIZE;
goto out;
}
if (xs->queue_id >= xs->dev->real_num_tx_queues)
goto out;
len = desc.len;
skb = sock_alloc_send_skb(sk, len, 1, &err);
if (unlikely(!skb)) {
err = -EAGAIN;