netdev - Re: [RFC Patch] net: reserve ports for applications using fixed port numbers

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Message-ID: <4B6F834E.4010801@redhat.com>
Date:	Mon, 08 Feb 2010 11:21:50 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Octavian Purdila <opurdila@...acom.com>
CC:	David Miller <davem@...emloft.net>, linux-kernel@...r.kernel.org,
	eric.dumazet@...il.com, linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org, nhorman@...driver.com,
	linux-sctp@...r.kernel.org
Subject: Re: [RFC Patch] net: reserve ports for applications using fixed port
 numbers

Octavian Purdila wrote:
> On Friday 05 February 2010 06:45:38 you wrote:
> 
>> Again, using bitmap algorithm is not a problem and it's better, the
>> problem is sysctl interface, how would you plan to interact with users
>> via sysctl/proc if you use bitmap to handle this? I would like to hear
>> more details about this.
>>
> 
> We could use something like positive values for setting and negative for reset 
> (e.g. 3 would set the port in the bitmap and -3 would reset it).


Hmm, then how do you output the info of those ports? Arrays of bitmaps?

> 
> But we would need new sysctl and proc handlers to handle the bitmap case (e.g. 
> sysctl_bitmap, proc_dobitmap_minmax).

Maybe.

Thanks.
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