From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934442Ab0EEK1H (ORCPT ); Wed, 5 May 2010 06:27:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45832 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759221Ab0EEK1A (ORCPT ); Wed, 5 May 2010 06:27:00 -0400 Date: Wed, 5 May 2010 06:26:34 -0400 From: Amerigo Wang To: linux-kernel@vger.kernel.org Cc: Octavian Purdila , ebiederm@xmission.com, Eric Dumazet , penguin-kernel@I-love.SAKURA.ne.jp, netdev@vger.kernel.org, Neil Horman , Amerigo Wang , xiaosuo@gmail.com, adobriyan@gmail.com, David Miller Message-Id: <20100505103033.5600.77502.sendpatchset@localhost.localdomain> Subject: [Patch v10 0/3] net: reserve ports for applications using fixed port numbers Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changes from the previous version: - Use 'true' and 'false' for bool's; - Fix some coding style problems; - Allow appending lines to bitmap proc file so that it will be easier to add new bits. ------------------> This patch introduces /proc/sys/net/ipv4/ip_local_reserved_ports which allows users to reserve ports for third-party applications. The reserved ports will not be used by automatic port assignments (e.g. when calling connect() or bind() with port number 0). Explicit port allocation behavior is unchanged. There are still some miss behaviors with regard to proc parsing in odd invalid cases (for "40000\0-40001" all is acknowledged but only 40000 is accepted) but they are not easy to fix without changing the current "acknowledge how much we accepted" behavior. Because of that and because the same issues are present in the existing proc_dointvec code as well I don't think its worth holding the actual feature (port reservation) after such petty error recovery issues.