From: Nikolay Aleksandrov <nikolay@nvidia.com>
To: Vladimir Oltean <olteanv@gmail.com>
Cc: netdev@vger.kernel.org, Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
Vivien Didelot <vivien.didelot@gmail.com>,
Jiri Pirko <jiri@resnulli.us>, Ido Schimmel <idosch@idosch.org>,
Tobias Waldekranz <tobias@waldekranz.com>,
Roopa Prabhu <roopa@nvidia.com>,
Vladimir Oltean <vladimir.oltean@nxp.com>
Subject: Re: [PATCH v4 net-next 01/14] net: bridge: switchdev: send FDB notifications for host addresses
Date: Tue, 29 Jun 2021 14:51:16 +0300 [thread overview]
Message-ID: <d0777778-2f30-591b-a78d-54546ca17df2@nvidia.com> (raw)
In-Reply-To: <20210629113557.eu5it6lfsnnaioej@skbuf>
On 29/06/2021 14:35, Vladimir Oltean wrote:
> On Tue, Jun 29, 2021 at 01:40:20PM +0300, Nikolay Aleksandrov wrote:
>>> @@ -117,18 +118,16 @@ br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
>>> .is_local = test_bit(BR_FDB_LOCAL, &fdb->flags),
>>> .offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags),
>>> };
>>> -
>>> - if (!fdb->dst)
>>> - return;
>>> + struct net_device *dev = fdb->dst ? fdb->dst->dev : br->dev;
>>
>> you should use READ_ONCE() for fdb->dst here to make sure it's read only once,
>> to be fair the old code had the same issue :)
>
> Thanks for the comment. I still have budget for one patch until I hit
> the 15 limit, so I guess I'll do that separately before this one.
> Just trying to make sure I get it right. You want me to annotate
> fdb_create(), br_fdb_update(), fdb_add_entry() and
> br_fdb_external_learn_add() with WRITE_ONCE() too, right?
> Can I resend right away or did you notice other issues in the other
> patches?
>
That would be best, yes. The rest of the changes look good to me.
Thanks,
Nik
next prev parent reply other threads:[~2021-06-29 11:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-28 21:59 [PATCH v4 net-next 00/14] RX filtering in DSA Vladimir Oltean
2021-06-28 21:59 ` [PATCH v4 net-next 01/14] net: bridge: switchdev: send FDB notifications for host addresses Vladimir Oltean
2021-06-29 10:40 ` Nikolay Aleksandrov
2021-06-29 11:35 ` Vladimir Oltean
2021-06-29 11:51 ` Nikolay Aleksandrov [this message]
2021-06-28 21:59 ` [PATCH v4 net-next 02/14] net: bridge: allow br_fdb_replay to be called for the bridge device Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 03/14] net: dsa: delete dsa_legacy_fdb_add and dsa_legacy_fdb_del Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 04/14] net: dsa: introduce dsa_is_upstream_port and dsa_switch_is_upstream_of Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 05/14] net: dsa: introduce a separate cross-chip notifier type for host MDBs Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 06/14] net: dsa: reference count the MDB entries at the cross-chip notifier level Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 07/14] net: dsa: introduce a separate cross-chip notifier type for host FDBs Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 08/14] net: dsa: reference count the FDB addresses at the cross-chip notifier level Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 09/14] net: dsa: install the host MDB and FDB entries in the master's RX filter Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 10/14] net: dsa: sync static FDB entries on foreign interfaces to hardware Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 11/14] net: dsa: include bridge addresses which are local in the host fdb list Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 12/14] net: dsa: include fdb entries pointing to bridge " Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 13/14] net: dsa: ensure during dsa_fdb_offload_notify that dev_hold and dev_put are on the same dev Vladimir Oltean
2021-06-28 22:00 ` [PATCH v4 net-next 14/14] net: dsa: replay the local bridge FDB entries pointing to the bridge dev too Vladimir Oltean
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