linux-kernel - Re: [PATCH net-next v4 12/12] net: bridge: Add port attribute IFLA_BRPORT_MRP_IN

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Date:   Tue, 14 Jul 2020 17:07:40 +0200
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
CC:     <roopa@...ulusnetworks.com>, <davem@...emloft.net>,
        <kuba@...nel.org>, <jiri@...nulli.us>, <ivecera@...hat.com>,
        <andrew@...n.ch>, <UNGLinuxDriver@...rochip.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bridge@...ts.linux-foundation.org>
Subject: Re: [PATCH net-next v4 12/12] net: bridge: Add port attribute
 IFLA_BRPORT_MRP_IN_OPEN

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@...rochip.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?

> 
> Acked-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.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