On Sun, Nov 20, 2016 at 4:56 PM, <f...@ikuai8.com> wrote:
> From: Gao Feng <gfree.w...@gmail.com>
>
> The tc could return NET_XMIT_CN as one congestion notification, but
> it does not mean the packe is lost. Other modules like ipvlan,
> macvlan, and others treat NET_XMIT_CN as success too.
> So l2tp_eth_dev_xmit should add the NET_XMIT_CN check.
>
> Signed-off-by: Gao Feng <gfree.w...@gmail.com>
> ---
> net/l2tp/l2tp_eth.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
> index 965f7e3..3dc97b4 100644
> --- a/net/l2tp/l2tp_eth.c
> +++ b/net/l2tp/l2tp_eth.c
> @@ -97,7 +97,7 @@ static int l2tp_eth_dev_xmit(struct sk_buff *skb, struct
> net_device *dev)
> unsigned int len = skb->len;
> int ret = l2tp_xmit_skb(session, skb, session->hdr_len);
>
> - if (likely(ret == NET_XMIT_SUCCESS)) {
> + if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
How could l2tp_xmit_skb() possibly return NET_XMIT_CN?
Note It ignores the return value of l2tp_xmit_core().
