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

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Message-Id: <201002051405.54029.opurdila@ixiacom.com>
Date:	Fri, 5 Feb 2010 14:05:53 +0200
From:	Octavian Purdila <opurdila@...acom.com>
To:	Cong Wang <amwang@...hat.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

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).

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