netdev - Re: [PATCH net-next] net: bridge: switchdev: allow port isolation to be offloaded

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Message-ID: <20210812101703.lwp7y7dq6pnmnj3b@skbuf>
Date:   Thu, 12 Aug 2021 13:17:03 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     DENG Qingfang <dqfext@...il.com>
Cc:     Ido Schimmel <idosch@...sch.org>, Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "moderated list:ETHERNET BRIDGE" <bridge@...ts.linux-foundation.org>,
        "open list:ETHERNET BRIDGE" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH net-next] net: bridge: switchdev: allow port isolation to
 be offloaded

On Thu, Aug 12, 2021 at 02:04:10PM +0800, DENG Qingfang wrote:
> On Thu, Aug 12, 2021 at 12:58:33AM +0300, Vladimir Oltean wrote:
> > On Thu, Aug 12, 2021 at 12:52:48AM +0300, Ido Schimmel wrote:
> > >
> > > If the purpose is correctness, then this is not the only flag that was
> > > missed. BR_HAIRPIN_MODE is also relevant for the data path, for example.
> >
> > I never wanted to suggest that I'm giving a comprehensive answer, I just
> > answered Qingfang's punctual question here:
> > https://lore.kernel.org/netdev/CALW65jbotyW0MSOd-bd1TH_mkiBWhhRCQ29jgn+d12rXdj2pZA@mail.gmail.com/
> >
> > Tobias also pointed out the same issue about BR_MULTICAST_TO_UNICAST in
> > conjunction with tx_fwd_offload (although the same is probably true even
> > without it):
> > https://patchwork.kernel.org/project/netdevbpf/cover/20210426170411.1789186-1-tobias@waldekranz.com/
> >
> > > Anyway, the commit message needs to be reworded to reflect the true
> > > purpose of the patch.
> >
> > Agree, and potentially extended with all the bridge port flags which are
> > broken without switchdev driver intervention.
>
> So, what else flags should be added to BR_PORT_FLAGS_HW_OFFLOAD?

I can't think of others beside these 3, BR_ISOLATED, BR_HAIRPIN_MODE and BR_MULTICAST_TO_UNICAST.