netdev - Re: [net-next PATCH v4 3/3] net: reserve ports for applications using fixed port numbers

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Date:	Wed, 17 Feb 2010 17:39:28 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cong Wang <amwang@...hat.com>
Cc:	Octavian Purdila <opurdila@...acom.com>,
	David Miller <davem@...emloft.net>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	Linux Kernel Developers <linux-kernel@...r.kernel.org>,
	Neil Horman <nhorman@...driver.com>
Subject: Re: [net-next PATCH v4 3/3] net: reserve ports for applications
 using fixed port numbers

Le jeudi 18 février 2010 à 00:13 +0800, Cong Wang a écrit :

> I don't think so, if you want to avoid race condition, you just need to
> write the reserved ports before any networking application starts, IOW,
> as early as possible during boot.
> 

Sure, but I was thinking retrieving the list of reserved port by a
database query, using network :)

Anyway, I just feel your argument is not applicable.

Our kernel is capable of doing an intersection for us, we dont need
to forbid user to mark a port as 'reserved' if this port is already
blacklisted by another mechanism (for example, if this port is already
in use)



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