netdev - Re: [PATCH v2] net: Fix missing meta data in skb with vlan packet

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Message-ID: <8fdc2d8a-8e9c-7c34-a2a1-f0b3dcfb8798@gmail.com>
Date:   Tue, 16 Apr 2019 10:17:54 +0900
From:   Yuya Kusakabe <yuya.kusakabe@...il.com>
To:     Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
Cc:     davem@...emloft.net, taketarou2@...il.com, netdev@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>
Subject: Re: [PATCH v2] net: Fix missing meta data in skb with vlan packet

On 4/16/19 9:45 AM, Toshiaki Makita wrote:
> On 2019/04/15 23:21, Yuya Kusakabe wrote:
>> skb_reorder_vlan_header() should move XDP meta data with ethernet header
>> if XDP meta data exists.
>>
>> Fixes: de8f3a83b0a0 ("bpf: add meta pointer for direct access")
>> Signed-off-by: Yuya Kusakabe <yuya.kusakabe@...il.com>
>> Signed-off-by: Takeru Hayasaka <taketarou2@...il.com>
>> Co-developed-by: Takeru Hayasaka <taketarou2@...il.com>
>> ---
> ...
>> @@ -5095,6 +5096,13 @@ static struct sk_buff *skb_reorder_vlan_header(struct sk_buff *skb)
>>  		memmove(skb_mac_header(skb) + VLAN_HLEN, skb_mac_header(skb),
>>  			mac_len - VLAN_HLEN - ETH_TLEN);
>>  	}
>> +
>> +	meta_len = skb_metadata_len(skb);
>> +	if (meta_len) {
>> +		meta = skb_metadata_end(skb) - meta_len;
>> +		memmove(meta + VLAN_HLEN, meta, meta_len);
>> +	};
> 
> You still have extra trailing semicolon.

Sorry. I'll make the v3 patch soon.

> 
>> +
>>  	skb->mac_header += VLAN_HLEN;
>>  	return skb;
>>  }
>>
>