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Message-ID: <6f679d47-f099-7345-0d97-6e07bfd7ceec@blackwall.org>
Date: Tue, 17 Oct 2023 12:31:38 +0300
From: Nikolay Aleksandrov <razor@...ckwall.org>
To: Johannes Nixdorf <jnixdorf-oss@....de>,
"David S. Miller" <davem@...emloft.net>,
Andrew Lunn <andrew@...n.ch>, David Ahern <dsahern@...il.com>,
Eric Dumazet <edumazet@...gle.com>,
Florian Fainelli <f.fainelli@...il.com>,
Ido Schimmel <idosch@...dia.com>,
Jakub Kicinski <kuba@...nel.org>,
Oleksij Rempel <linux@...pel-privat.de>,
Paolo Abeni <pabeni@...hat.com>,
Roopa Prabhu <roopa@...dia.com>, Shuah Khan <shuah@...nel.org>,
Vladimir Oltean <vladimir.oltean@....com>
Cc: bridge@...ts.linux-foundation.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net-next v5 3/5] net: bridge: Add netlink knobs for number
/ max learned FDB entries
On 10/16/23 16:27, Johannes Nixdorf wrote:
> The previous patch added accounting and a limit for the number of
> dynamically learned FDB entries per bridge. However it did not provide
> means to actually configure those bounds or read back the count. This
> patch does that.
>
> Two new netlink attributes are added for the accounting and limit of
> dynamically learned FDB entries:
> - IFLA_BR_FDB_N_LEARNED (RO) for the number of entries accounted for
> a single bridge.
> - IFLA_BR_FDB_MAX_LEARNED (RW) for the configured limit of entries for
> the bridge.
>
> The new attributes are used like this:
>
> # ip link add name br up type bridge fdb_max_learned 256
> # ip link add name v1 up master br type veth peer v2
> # ip link set up dev v2
> # mausezahn -a rand -c 1024 v2
> 0.01 seconds (90877 packets per second
> # bridge fdb | grep -v permanent | wc -l
> 256
> # ip -d link show dev br
> 13: br: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 [...]
> [...] fdb_n_learned 256 fdb_max_learned 256
>
> Signed-off-by: Johannes Nixdorf <jnixdorf-oss@....de>
> ---
> include/uapi/linux/if_link.h | 2 ++
> net/bridge/br_netlink.c | 15 ++++++++++++++-
> 2 files changed, 16 insertions(+), 1 deletion(-)
>
Acked-by: Nikolay Aleksandrov <razor@...ckwall.org>
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