Re: [PATCH net-next] tun: return NET_XMIT_DROP for dropped packets

[Cong Wang]

On Wed, Nov 19, 2014 at 11:46 AM, David Miller <davem@xxxxxxxxxxxxx> wrote:
>
> Often the issue with TX return values is lack of clear documentation
> and use cases.
>

NET_XMIT_* are marked as qdisc ->enqueue() return codes
in include/linux/netdevice.h, and are indeed used mostly by
qdisc:

$ git grep NET_XMIT_ -- net/sched/ | wc -l
88
$ git grep NET_XMIT_ -- drivers/net/ | wc -l
15

It is a mess. Not to mention we have __NET_XMIT_ code too.
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