Re: [PATCH net-next v4 12/12] net: bridge: Add port attribute IFLA_BRPORT_MRP_IN_OPEN

From: Horatiu Vultur <horatiu.vultur@microchip.com>
To: Nikolay Aleksandrov <nikolay@cumulusnetworks.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>
Subject: Re: [PATCH net-next v4 12/12] net: bridge: Add port attribute IFLA_BRPORT_MRP_IN_OPEN
Date: Tue, 14 Jul 2020 17:53:04 +0200	[thread overview]
Message-ID: <20200714155304.6isfmpwhbqnh57kr@soft-dev3.localdomain> (raw)
In-Reply-To: <a22642aa-63a2-e492-5f64-b344c62d0142@cumulusnetworks.com>

The 07/14/2020 18:33, Nikolay Aleksandrov wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> 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.

OK, lets just drop it for now.

> 
> 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)
> >>>
> >>
> >
> 

-- 
/Horatiu