[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20230526170223.gjdek6ob2w2kibzr@skbuf>
Date: Fri, 26 May 2023 20:02:23 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: arinc9.unal@...il.com
Cc: Sean Wang <sean.wang@...iatek.com>,
Landen Chao <Landen.Chao@...iatek.com>,
DENG Qingfang <dqfext@...il.com>,
Daniel Golle <daniel@...rotopia.org>,
Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Russell King <linux@...linux.org.uk>,
Arınç ÜNAL <arinc.unal@...nc9.com>,
Richard van Schagen <richard@...terhints.com>,
Richard van Schagen <vschagen@...com>,
Frank Wunderlich <frank-w@...lic-files.de>,
Bartel Eerdekens <bartel.eerdekens@...stell8.be>,
erkin.bozoglu@...ont.com, mithat.guner@...ont.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH net-next 27/30] net: dsa: mt7530: introduce BPDU trapping
for MT7530 switch
On Mon, May 22, 2023 at 03:15:29PM +0300, arinc9.unal@...il.com wrote:
> From: Arınç ÜNAL <arinc.unal@...nc9.com>
>
> The MT753X switches are capable of trapping certain frames. Introduce
> trapping BPDUs to the CPU port for the MT7530 switch.
>
> BPDUs will be trapped to the numerically smallest CPU port which is affine
> to the DSA conduit interface that is set up. The BPDUs won't necessarily be
> trapped to the CPU port the user port, which these BPDUs are received from,
> is affine to.
>
> Tested-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> ---
> drivers/net/dsa/mt7530.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
> index cd16911fcb01..2fb4b0bc6335 100644
> --- a/drivers/net/dsa/mt7530.c
> +++ b/drivers/net/dsa/mt7530.c
> @@ -2223,6 +2223,10 @@ mt7530_setup(struct dsa_switch *ds)
> val |= MHWTRAP_MANUAL;
> mt7530_write(priv, MT7530_MHWTRAP, val);
>
> + /* Trap BPDUs to the CPU port */
> + mt7530_rmw(priv, MT753X_BPC, MT753X_BPDU_PORT_FW_MASK,
> + MT753X_BPDU_CPU_ONLY);
> +
If the switch doesn't currently trap BPDUs, isn't STP broken?
ip link add br0 type bridge stp_state 1
(with or without a userspace helper installed at /sbin/bridge-stp
for more modern protocols than the original 802.1D STP)
> /* Enable and reset MIB counters */
> mt7530_mib_reset(ds);
>
> --
> 2.39.2
>
Powered by blists - more mailing lists