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Date:   Mon, 9 Mar 2020 20:18:16 -0600
From:   David Ahern <>
To:     Jason Wang <>, David Ahern <>,
        David Ahern <>
Subject: Re: [PATCH RFC v4 bpf-next 07/11] tun: set egress XDP program

On 3/1/20 8:32 PM, Jason Wang wrote:
>> @@ -1189,15 +1190,21 @@ tun_net_get_stats64(struct net_device *dev,
>> struct rtnl_link_stats64 *stats)
>>   }
>>     static int tun_xdp_set(struct net_device *dev, struct bpf_prog *prog,
>> -               struct netlink_ext_ack *extack)
> How about accept a bpf_prog ** here, then there's no need to check
> egress when deferencing the pointer?

The egress arg is better. xdp_prog vs xdp_egress_prog is an element of
'struct tun'. tun is currently not needed in tun_xdp and is part of
tun_xdp_set already.

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