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Subject: Re: [PATCH net-next v4 12/12] net: bridge: Add port attribute
 IFLA_BRPORT_MRP_IN_OPEN
To:     Horatiu Vultur <horatiu.vultur@microchip.com>
Cc:     roopa@cumulusnetworks.com, davem@davemloft.net, kuba@kernel.org,
        jiri@resnulli.us, ivecera@redhat.com, andrew@lunn.ch,
        UNGLinuxDriver@microchip.com, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, bridge@lists.linux-foundation.org
References: <20200714073458.1939574-1-horatiu.vultur@microchip.com>
 <20200714073458.1939574-13-horatiu.vultur@microchip.com>
 <9eeb89c5-865f-2b21-c7c6-7f4479bf4175@cumulusnetworks.com>
 <20200714150740.3ji3qhtvikhrizfn@soft-dev3.localdomain>
From:   Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Message-ID: <a22642aa-63a2-e492-5f64-b344c62d0142@cumulusnetworks.com>
Date:   Tue, 14 Jul 2020 18:33:25 +0300
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On 14/07/2020 18:07, Horatiu Vultur wrote:
> The 07/14/2020 16:29, Nikolay Aleksandrov wrote:
>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>
>> On 14/07/2020 10:34, Horatiu Vultur wrote:
>>> This patch adds a new port attribute, IFLA_BRPORT_MRP_IN_OPEN, which
>>> allows to notify the userspace when the node lost the contiuity of
>>> MRP_InTest frames.
>>>
>>> Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
>>> ---
>>>  include/uapi/linux/if_link.h       | 1 +
>>>  net/bridge/br_netlink.c            | 3 +++
>>>  tools/include/uapi/linux/if_link.h | 1 +
>>>  3 files changed, 5 insertions(+)
>>>
> 
> Hi Nik,
> 
>>
>> It's kind of late by now, but I'd wish these were contained in a nested MRP attribute. :)
>> Horatiu, do you expect to have many more MRP attributes outside of MRP netlink code?
> 
> I don't expect to add any other MRP attributes outside of MRP netlink
> code.
> 
>>
>> Perhaps we should at least dump them only for MRP-aware ports, that should be easy.
>> They make no sense outside of MRP anyway, but increase the size of the dump for all
>> right now.
> 
> You are right. Then should I first send a fix on the net for this and
> after that I will fix these patches or just fix this in the next patch
> series?
> 

IMO it's more of an improvement rather than a bug, but since you don't expect to have more
attributes outside of MRP's netlink I guess we can drop it for now. Up to you.

It definitely shouldn't block this patch-set.

>>
>> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
>>
>>> diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
>>> index cc185a007ade8..26842ffd0501d 100644
>>> --- a/include/uapi/linux/if_link.h
>>> +++ b/include/uapi/linux/if_link.h
>>> @@ -344,6 +344,7 @@ enum {
>>>       IFLA_BRPORT_ISOLATED,
>>>       IFLA_BRPORT_BACKUP_PORT,
>>>       IFLA_BRPORT_MRP_RING_OPEN,
>>> +     IFLA_BRPORT_MRP_IN_OPEN,
>>>       __IFLA_BRPORT_MAX
>>>  };
>>>  #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
>>> diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
>>> index c532fa65c9834..147d52596e174 100644
>>> --- a/net/bridge/br_netlink.c
>>> +++ b/net/bridge/br_netlink.c
>>> @@ -152,6 +152,7 @@ static inline size_t br_port_info_size(void)
>>>  #endif
>>>               + nla_total_size(sizeof(u16))   /* IFLA_BRPORT_GROUP_FWD_MASK */
>>>               + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_RING_OPEN */
>>> +             + nla_total_size(sizeof(u8))    /* IFLA_BRPORT_MRP_IN_OPEN */
>>>               + 0;
>>>  }
>>>
>>> @@ -216,6 +217,8 @@ static int br_port_fill_attrs(struct sk_buff *skb,
>>>                      !!(p->flags & BR_NEIGH_SUPPRESS)) ||
>>>           nla_put_u8(skb, IFLA_BRPORT_MRP_RING_OPEN, !!(p->flags &
>>>                                                         BR_MRP_LOST_CONT)) ||
>>> +         nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
>>> +                    !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
>>>           nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
>>>               return -EMSGSIZE;
>>>
>>> diff --git a/tools/include/uapi/linux/if_link.h b/tools/include/uapi/linux/if_link.h
>>> index cafedbbfefbe9..781e482dc499f 100644
>>> --- a/tools/include/uapi/linux/if_link.h
>>> +++ b/tools/include/uapi/linux/if_link.h
>>> @@ -344,6 +344,7 @@ enum {
>>>       IFLA_BRPORT_ISOLATED,
>>>       IFLA_BRPORT_BACKUP_PORT,
>>>       IFLA_BRPORT_MRP_RING_OPEN,
>>> +     IFLA_BRPORT_MRP_IN_OPEN,
>>>       __IFLA_BRPORT_MAX
>>>  };
>>>  #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
>>>
>>
>