netdev - Re: [Cake] [PATCH net v2] sched: consistently handle layer3 header accesses in the presence of VLANs

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Date:   Fri, 03 Jul 2020 22:22:42 +0200
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Roman Mashak <mrv@...atatu.com>
Cc:     Davide Caratti <dcaratti@...hat.com>,
        Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org,
        Jamal Hadi Salim <jhs@...atatu.com>,
        cake@...ts.bufferbloat.net,
        Ilya Ponetayev <i.ponetaev@...systems.com>,
        Cong Wang <xiyou.wangcong@...il.com>, davem@...emloft.net
Subject: Re: [Cake] [PATCH net v2] sched: consistently handle layer3 header accesses in the presence of VLANs

Roman Mashak <mrv@...atatu.com> writes:

> Toke Høiland-Jørgensen <toke@...hat.com> writes:
>
>
> [...]
>
>> +/* A getter for the SKB protocol field which will handle VLAN tags consistently
>> + * whether VLAN acceleration is enabled or not.
>> + */
>> +static inline __be16 skb_protocol(const struct sk_buff *skb, bool skip_vlan)
>> +{
>> +	unsigned int offset = skb_mac_offset(skb) + sizeof(struct ethhdr);
>> +	__be16 proto = skb->protocol;
>> +	struct vlan_hdr vhdr, *vh;
>
> Nit: you could move vhdr and *vh definitions inside the while loop,
> because of their inner scope use.

Sure, can do.

-Toke