From: Ido Schimmel <idosch@idosch.org>
To: Vladimir Oltean <olteanv@gmail.com>
Cc: Jakub Kicinski <kuba@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, Ioana Ciornei <ioana.ciornei@nxp.com>,
Vadym Kochan <vkochan@marvell.com>,
Taras Chornyi <tchornyi@marvell.com>,
Jiri Pirko <jiri@nvidia.com>, Ido Schimmel <idosch@nvidia.com>,
Grygorii Strashko <grygorii.strashko@ti.com>,
Ivan Vecera <ivecera@redhat.com>, Roopa Prabhu <roopa@nvidia.com>,
Nikolay Aleksandrov <nikolay@nvidia.com>,
Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Vignesh Raghavendra <vigneshr@ti.com>,
Linus Walleij <linus.walleij@linaro.org>,
linux-omap@vger.kernel.org,
Vladimir Oltean <vladimir.oltean@nxp.com>,
Tobias Waldekranz <tobias@waldekranz.com>
Subject: Re: [PATCH resend net-next 2/2] net: bridge: switchdev: include local flag in FDB notifications
Date: Fri, 16 Apr 2021 18:22:08 +0300 [thread overview]
Message-ID: <YHmroFOPM3Hl/5uP@shredder.lan> (raw)
In-Reply-To: <20210414165256.1837753-3-olteanv@gmail.com>
On Wed, Apr 14, 2021 at 07:52:56PM +0300, Vladimir Oltean wrote:
> From: Vladimir Oltean <vladimir.oltean@nxp.com>
>
> As explained in bugfix commit 6ab4c3117aec ("net: bridge: don't notify
> switchdev for local FDB addresses") as well as in this discussion:
> https://lore.kernel.org/netdev/20210117193009.io3nungdwuzmo5f7@skbuf/
>
> the switchdev notifiers for FDB entries managed to have a zero-day bug,
> which was that drivers would not know what to do with local FDB entries,
> because they were not told that they are local. The bug fix was to
> simply not notify them of those addresses.
>
> Let us now add the 'is_local' bit to bridge FDB entries, and make all
> drivers ignore these entries by their own choice.
>
> Co-developed-by: Tobias Waldekranz <tobias@waldekranz.com>
> Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
One comment below
> diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
> index c390f84adea2..a5e601e41cb9 100644
> --- a/net/bridge/br_switchdev.c
> +++ b/net/bridge/br_switchdev.c
> @@ -114,13 +114,12 @@ br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
> .addr = fdb->key.addr.addr,
> .vid = fdb->key.vlan_id,
> .added_by_user = test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags),
> + .is_local = test_bit(BR_FDB_LOCAL, &fdb->flags),
> .offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags),
> };
>
> if (!fdb->dst)
> return;
Do you plan to eventually remove this check so that entries pointing to
the bridge device itself will be notified? For example:
# bridge fdb add 00:01:02:03:04:05 dev br0 self local
> - if (test_bit(BR_FDB_LOCAL, &fdb->flags))
> - return;
>
> switch (type) {
> case RTM_DELNEIGH:
next prev parent reply other threads:[~2021-04-16 15:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-14 16:52 [PATCH resend net-next 0/2] Pass the BR_FDB_LOCAL information to switchdev drivers Vladimir Oltean
2021-04-14 16:52 ` [PATCH resend net-next 1/2] net: bridge: switchdev: refactor br_switchdev_fdb_notify Vladimir Oltean
2021-04-16 15:19 ` Ido Schimmel
2021-04-19 8:50 ` Nikolay Aleksandrov
2021-04-14 16:52 ` [PATCH resend net-next 2/2] net: bridge: switchdev: include local flag in FDB notifications Vladimir Oltean
2021-04-16 10:11 ` Grygorii Strashko
2021-04-16 15:22 ` Ido Schimmel [this message]
2021-04-16 17:33 ` Vladimir Oltean
2021-04-19 8:51 ` Nikolay Aleksandrov
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