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[78.154.15.142]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-39c301a7064sm5279408f8f.34.2025.04.04.13.15.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 04 Apr 2025 13:15:20 -0700 (PDT) Message-ID: <96bda215-bee1-4ff7-9d88-b97922ca7b1a@blackwall.org> Date: Fri, 4 Apr 2025 23:15:19 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [Patch v2 net-next 3/3] net: bridge: mcast: Notify on mdb offload failure To: Joseph Huang , Joseph Huang , netdev@vger.kernel.org Cc: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Roopa Prabhu , Simon Horman , linux-kernel@vger.kernel.org, bridge@lists.linux.dev References: <20250403234412.1531714-1-Joseph.Huang@garmin.com> <20250403234412.1531714-4-Joseph.Huang@garmin.com> <36c7286d-b410-4695-b069-f79605feade4@blackwall.org> <917d4124-c389-4623-836d-357150b45240@gmail.com> <9e7f6c4c-cabe-46e9-b59f-6638b4ae25e3@gmail.com> Content-Language: en-US From: Nikolay Aleksandrov In-Reply-To: <9e7f6c4c-cabe-46e9-b59f-6638b4ae25e3@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 4/4/25 23:11, Joseph Huang wrote: > On 4/4/2025 4:04 PM, Nikolay Aleksandrov wrote: >> On 4/4/25 18:25, Joseph Huang wrote: >>> On 4/4/2025 6:29 AM, Nikolay Aleksandrov wrote: >>>> On 4/4/25 02:44, Joseph Huang wrote: >>>>> Notify user space on mdb offload failure if mdb_offload_fail_notification >>>>> is set. >>>>> >>>>> Signed-off-by: Joseph Huang >>>>> --- >>>>>    net/bridge/br_mdb.c       | 26 +++++++++++++++++++++----- >>>>>    net/bridge/br_private.h   |  9 +++++++++ >>>>>    net/bridge/br_switchdev.c |  4 ++++ >>>>>    3 files changed, 34 insertions(+), 5 deletions(-) >>>>> >>>> >>>> The patch looks good, but one question - it seems we'll mark mdb entries with >>>> "offload failed" when we get -EOPNOTSUPP as an error as well. Is that intended? >>>> >>>> That is, if the option is enabled and we have mixed bridge ports, we'll mark mdbs >>>> to the non-switch ports as offload failed, but it is not due to a switch offload >>>> error. >>> >>> Good catch. No, that was not intended. >>> >>> What if we short-circuit and just return like you'd suggested initially if err == -EOPNOTSUPP? >>> >>>>> diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c >>>>> index 40f0b16e4df8..9b5005d0742a 100644 >>>>> --- a/net/bridge/br_switchdev.c >>>>> +++ b/net/bridge/br_switchdev.c >>>>> @@ -504,6 +504,7 @@ static void br_switchdev_mdb_complete(struct net_device *dev, int err, void *pri >>>>>        struct net_bridge_mdb_entry *mp; >>>>>        struct net_bridge_port *port = data->port; >>>>>        struct net_bridge *br = port->br; >>>>> +    u8 old_flags; >>>>>    >>> >>> +    if (err == -EOPNOTSUPP) >>> +        goto notsupp; >>> >>>>>        spin_lock_bh(&br->multicast_lock); >>>>>        mp = br_mdb_ip_get(br, &data->ip); >>>>> @@ -514,7 +515,10 @@ static void br_switchdev_mdb_complete(struct net_device *dev, int err, void *pri >>>>>            if (p->key.port != port) >>>>>                continue; >>>>>    +        old_flags = p->flags; >>>>>            br_multicast_set_pg_offload_flags(p, !err); >>>>> +        if (br_mdb_should_notify(br, old_flags ^ p->flags)) >>>>> +            br_mdb_flag_change_notify(br->dev, mp, p); >>>>>        } >>>>>    out: >>>>>        spin_unlock_bh(&br->multicast_lock); >>>> >>> >>> + notsupp: >>>      kfree(priv); >> >> Looks good to me. Thanks! > > Thanks for the review! > > And a logistic question. Now that part 1 and part 2 are ack'd (thanks again for the review), when I send out v3, should I resend those (unmodified part 1 and part 2) with my v3 patch series, or should I break this one off and only send part 3 v3 as a separate patch? > > Thanks, > Joseph You should send the whole set again as v3, but you should keep the acked-by tags in those patches. Cheers, Nik