netdev - Re: [PATCH net] rtnetlink: allow to set iface down before enslaving it

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Message-ID: <42ad4a1e-3a48-48aa-acd1-47d44b2ad0ba@kernel.org>
Date: Sun, 31 Dec 2023 09:36:47 -0700
From: David Ahern <dsahern@...nel.org>
To: Nicolas Dichtel <nicolas.dichtel@...nd.com>,
 "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>,
 Phil Sutter <phil@....cc>
Cc: netdev@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH net] rtnetlink: allow to set iface down before enslaving
 it

On 12/29/23 5:08 AM, Nicolas Dichtel wrote:
> The below commit adds support for:
>> ip link set dummy0 down
>> ip link set dummy0 master bond0 up
> 
> but breaks the opposite:
>> ip link set dummy0 up
>> ip link set dummy0 master bond0 down
> 
> Let's add a workaround to have both commands working.
> 
> Cc: stable@...r.kernel.org
> Fixes: a4abfa627c38 ("net: rtnetlink: Enslave device before bringing it up")
> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> ---
>  net/core/rtnetlink.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 

add tests to tools/testing/selftests/net/rtnetlink.sh