netdev - Re: [ovs-dev] [RFC PATCH 1/5] netfilter: Remove IP_CT_NEW

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Message-ID: <20151021083323.GB15539@pox.localdomain>
Date:	Wed, 21 Oct 2015 10:33:23 +0200
From:	Thomas Graf <tgraf@...g.ch>
To:	Jarno Rajahalme <jrajahalme@...ira.com>
Cc:	netdev@...r.kernel.org, dev@...nvswitch.org,
	netfilter-devel@...r.kernel.org
Subject: Re: [ovs-dev] [RFC PATCH 1/5] netfilter: Remove IP_CT_NEW_REPLY
 definition.

[Copying netfilter-devel]

On 10/20/15 at 03:20pm, Jarno Rajahalme wrote:
> Remove the definition of IP_CT_NEW_REPLY as it does not make sense.
> This allows the definition of IP_CT_NUMBER to be simplified as well.
> 
> Signed-off-by: Jarno Rajahalme <jrajahalme@...ira.com>
> ---
>  include/uapi/linux/netfilter/nf_conntrack_common.h | 7 ++++---
>  net/openvswitch/conntrack.c                        | 2 --
>  2 files changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/include/uapi/linux/netfilter/nf_conntrack_common.h b/include/uapi/linux/netfilter/nf_conntrack_common.h
> index 319f471..e0aebc8 100644
> --- a/include/uapi/linux/netfilter/nf_conntrack_common.h
> +++ b/include/uapi/linux/netfilter/nf_conntrack_common.h
> @@ -20,9 +20,10 @@ enum ip_conntrack_info {
>  
>  	IP_CT_ESTABLISHED_REPLY = IP_CT_ESTABLISHED + IP_CT_IS_REPLY,
>  	IP_CT_RELATED_REPLY = IP_CT_RELATED + IP_CT_IS_REPLY,
> -	IP_CT_NEW_REPLY = IP_CT_NEW + IP_CT_IS_REPLY,	
> -	/* Number of distinct IP_CT types (no NEW in reply dirn). */
> -	IP_CT_NUMBER = IP_CT_IS_REPLY * 2 - 1
> +	/* No IP_CT_NEW_REPLY */
> +
> +	/* Number of distinct IP_CT types. */
> +	IP_CT_NUMBER
>  };

I understand what you are doing here but this is part of the published
UAPI and removing this might break compilation of a user application
even if the definition is not used right now. It's probably safer to
leave the definition and obsolete it with a comment.
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