linux-kernel - Re: [PATCH net-next 1/4] net: bridge: Add support for bridge port in locked mode

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Message-ID: <20220207093048.24bb6249@hermes.local>
Date:   Mon, 7 Feb 2022 09:30:48 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Hans Schultz <schultz.hans@...il.com>
Cc:     davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
        Hans Schultz <schultz.hans+netdev@...il.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        linux-kernel@...r.kernel.org, bridge@...ts.linux-foundation.org
Subject: Re: [PATCH net-next 1/4] net: bridge: Add support for bridge port
 in locked mode

On Mon,  7 Feb 2022 11:07:39 +0100
Hans Schultz <schultz.hans@...il.com> wrote:

> --- a/include/uapi/linux/if_link.h
> +++ b/include/uapi/linux/if_link.h
> @@ -532,6 +532,7 @@ enum {
>  	IFLA_BRPORT_GROUP_FWD_MASK,
>  	IFLA_BRPORT_NEIGH_SUPPRESS,
>  	IFLA_BRPORT_ISOLATED,
> +	IFLA_BRPORT_LOCKED,
>  	IFLA_BRPORT_BACKUP_PORT,
>  	IFLA_BRPORT_MRP_RING_OPEN,

Adding new element in middle of enum causes them to be renumbered.
That breaks the kernel ABI. Please add only at end.