linux-kernel - Re: [PATCH net-next v2 1/3] vxlan: Expose helper vxlan_build_gbp

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Date:   Thu, 16 Feb 2023 21:28:32 +0800
From:   Gavin Li <gavinl@...dia.com>
To:     Paolo Abeni <pabeni@...hat.com>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, roopa@...dia.com,
        eng.alaamohamedsoliman.am@...il.com, bigeasy@...utronix.de
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Gavi Teitz <gavi@...dia.com>, Roi Dayan <roid@...dia.com>,
        Maor Dickman <maord@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: Re: [PATCH net-next v2 1/3] vxlan: Expose helper vxlan_build_gbp_hdr


On 2/16/2023 7:57 PM, Paolo Abeni wrote:
> External email: Use caution opening links or attachments
>
>
> On Wed, 2023-02-15 at 11:41 +0200, Gavin Li wrote:
>> vxlan_build_gbp_hdr will be used by other modules to build gbp option in
>> vxlan header according to gbp flags.
>>
>> Signed-off-by: Gavin Li <gavinl@...dia.com>
>> Reviewed-by: Gavi Teitz <gavi@...dia.com>
>> Reviewed-by: Roi Dayan <roid@...dia.com>
>> Reviewed-by: Maor Dickman <maord@...dia.com>
>> Acked-by: Saeed Mahameed <saeedm@...dia.com>
>> ---
>>   drivers/net/vxlan/vxlan_core.c | 20 --------------------
>>   include/net/vxlan.h            | 20 ++++++++++++++++++++
>>   2 files changed, 20 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
>> index b1b179effe2a..bd44467a5a39 100644
>> --- a/drivers/net/vxlan/vxlan_core.c
>> +++ b/drivers/net/vxlan/vxlan_core.c
>> @@ -2140,26 +2140,6 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb)
>>        return false;
>>   }
>>
>> -static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
>> -                             struct vxlan_metadata *md)
>> -{
>> -     struct vxlanhdr_gbp *gbp;
>> -
>> -     if (!md->gbp)
>> -             return;
>> -
>> -     gbp = (struct vxlanhdr_gbp *)vxh;
>> -     vxh->vx_flags |= VXLAN_HF_GBP;
>> -
>> -     if (md->gbp & VXLAN_GBP_DONT_LEARN)
>> -             gbp->dont_learn = 1;
>> -
>> -     if (md->gbp & VXLAN_GBP_POLICY_APPLIED)
>> -             gbp->policy_applied = 1;
>> -
>> -     gbp->policy_id = htons(md->gbp & VXLAN_GBP_ID_MASK);
>> -}
>> -
>>   static int vxlan_build_gpe_hdr(struct vxlanhdr *vxh, u32 vxflags,
>>                               __be16 protocol)
>>   {
>> diff --git a/include/net/vxlan.h b/include/net/vxlan.h
>> index bca5b01af247..02b01a6034a2 100644
>> --- a/include/net/vxlan.h
>> +++ b/include/net/vxlan.h
>> @@ -566,4 +566,24 @@ static inline bool vxlan_fdb_nh_path_select(struct nexthop *nh,
>>        return true;
>>   }
>>
>> +static inline void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
>> +                                    const struct vxlan_metadata *md)
> Calling this helper causes a warning on patch 3 due to different types
> for the 2nd argument. The warning could be addressed there with an
> explicit cast but it looks like 'vxflags' is not used at all here.
>
> I suggest to add a preparation patch dropping such argument (and the
> same for vxlan_build_gpe_hdr(), still in the same patch), should be
> cleaner.
ACK
>
> Thanks,
>
> Paolo
>