netdev - Re: [PATCH v2 1/2] gtp: rename SGSN netlink attribute

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Date:   Tue, 21 Mar 2017 16:07:48 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Jonas Bonn <jonas@...thpole.se>
Cc:     laforge@...monks.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 1/2] gtp: rename SGSN netlink attribute

On Tue, Mar 21, 2017 at 04:04:29PM +0100, Jonas Bonn wrote:
> diff --git a/include/uapi/linux/gtp.h b/include/uapi/linux/gtp.h
> index 72a04a0..c51ebb0 100644
> --- a/include/uapi/linux/gtp.h
> +++ b/include/uapi/linux/gtp.h
> @@ -19,7 +19,7 @@ enum gtp_attrs {
>  	GTPA_LINK,
>  	GTPA_VERSION,
>  	GTPA_TID,	/* for GTPv0 only */
> -	GTPA_SGSN_ADDRESS,
> +	GTPA_PEER_ADDRESS,	/* Remote GSN peer, either SGSN or GGSN */

We need here:

#define GTPA_SGSN_ADDRESS GTPA_PEER_ADDRESS

for backward compatibility. Anything that is exposed through uapi
cannot be changed.

>  	GTPA_MS_ADDRESS,
>  	GTPA_FLOW,
>  	GTPA_NET_NS_FD,
> @@ -29,5 +29,6 @@ enum gtp_attrs {
>  	__GTPA_MAX,
>  };
>  #define GTPA_MAX (__GTPA_MAX + 1)
> +#define GTPA_SGSN_ADDRESS GTPA_PEER_ADDRESS /* maintain legacy attr name */
>  
>  #endif /* _UAPI_LINUX_GTP_H_ */
> -- 
> 2.9.3
>