linux-kernel - Re: [ 059/143] sysctl net: Keep tcp_syn

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Date:	Sat, 14 Jun 2014 19:50:47 +0200
From:	Willy Tarreau <w@....eu>
To:	Luis Henriques <luis.henriques@...onical.com>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Michal Tesar <mtesar@...hat.com>,
	"David S. Miller" <davem@...emloft.net>, tyler.hicks@...onical.com
Subject: Re: [ 059/143] sysctl net: Keep tcp_syn_retries inside the boundary

Hi Luis,

On Thu, Jun 12, 2014 at 01:55:53PM +0100, Luis Henriques wrote:
> I was finally able to spend some more time with this and tried (a
> modified) Tyler's patch on top of 2.6.32.62, and it seems to work.
> Although I haven't done any extended testing, I don't see the two
> stack traces and the /proc/sys/net/ipv4/ directory seems to be
> correctly populated.
> 
> I'm attaching the patch I've used, based on Tyler's.

Would any of you or Tyler please kindly pass me a signed-off-by with
a commit message ? That would be great. Alternately I'd do it myself
and mention you authored them.

> Cheers,
> -- 
> Luís

Thanks,
Willy

> diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
> index e2eaf29..e6bf72c 100644
> --- a/net/core/sysctl_net_core.c
> +++ b/net/core/sysctl_net_core.c
> @@ -121,7 +121,8 @@ static struct ctl_table netns_core_table[] = {
>  		.mode		= 0644,
>  		.extra1		= &zero,
>  		.extra2		= &ushort_max,
> -		.proc_handler	= proc_dointvec_minmax
> +		.proc_handler	= proc_dointvec_minmax,
> +		.strategy	= &sysctl_intvec
>  	},
>  	{ .ctl_name = 0 }
>  };
> diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
> index 910fa54..d957371 100644
> --- a/net/ipv4/sysctl_net_ipv4.c
> +++ b/net/ipv4/sysctl_net_ipv4.c
> @@ -241,7 +241,8 @@ static struct ctl_table ipv4_table[] = {
>  		.mode		= 0644,
>  		.proc_handler	= proc_dointvec_minmax,
>  		.extra1		= &tcp_syn_retries_min,
> -		.extra2		= &tcp_syn_retries_max
> +		.extra2		= &tcp_syn_retries_max,
> +		.strategy	= &sysctl_intvec
>  	},
>  	{
>  		.ctl_name	= NET_IPV4_NONLOCAL_BIND,
--
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