From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759966AbYHIAzJ (ORCPT ); Fri, 8 Aug 2008 20:55:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752541AbYHIAy6 (ORCPT ); Fri, 8 Aug 2008 20:54:58 -0400 Received: from n28.bullet.mail.mud.yahoo.com ([68.142.206.223]:39758 "HELO n28.bullet.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751874AbYHIAy5 (ORCPT ); Fri, 8 Aug 2008 20:54:57 -0400 X-Yahoo-Newman-Id: 834847.73401.bm@omp418.mail.mud.yahoo.com DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.de; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:Date:From:User-Agent:MIME-Version:To:Subject:X-Enigmail-Version:Content-Type:Content-Transfer-Encoding; b=vOGyOxAuwddECl0LJi46OPEpQWUZsNcNnrc5i/iALPfPgW75TReiDOdj0IdhIwtCmTCV/rLX+tah6t+E91QVSqkT5yXYVjU/WbO5BspuPIBRagaw/kGdDw1n2oqa30BOrMvH96UkmNopxVMurNNZ2kJeSUYoAWXuOH5U21urYBQ= ; X-YMail-OSG: RHaH6JcVM1ldZ6smeP3HyK7MWvYIMNmX.kseI7.xZZUQf1r7Vc5xMeWSzcH4v.QqjpLiSIN8lAKHDocBe97rGNXw_XHjxgZQFfgV5DpFeTjIZDn4xR3Hj.hfxGZWauGJMSI- X-Yahoo-Newman-Property: ymail-3 Message-ID: <489CEADE.4030905@yahoo.de> Date: Sat, 09 Aug 2008 02:54:54 +0200 From: Christian Franke User-Agent: Thunderbird 2.0.0.16 (X11/20080730) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: [PATCH 2.6.27-rc2] block: loop device partition support X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Christian Franke By default, partition support of loop devices is disabled and there seems to be no way to turn it on without changing code, if loop is not compiled as module. This patch introduces CONFIG_BLK_DEV_LOOP_MAXPART to make partition support configurable via Kconfig. It keeps that feature disabled by default for not breaking backward compatibility. Signed-off-by: Christian Franke --- --- linux-2.6/drivers/block/Kconfig +++ linux-2.6-loop/drivers/block/Kconfig @@ -248,6 +248,23 @@ config BLK_DEV_LOOP Most users will answer N here. +config BLK_DEV_LOOP_MAXPART + int "Maximum number of partitions per loop device" + default "0" + depends on BLK_DEV_LOOP + ---help--- + Loop device partition support is disabled by default. If max_part + is non-zero, partition support for loop devices is enabled for up to + max_part partitions. + + Note: If you compile loop as module, you can also pass max_part as + parameter when loading it. + + Warning: non-zero values break compatibility with applications which + access the loop devices via major and minor number. + + Most users will answer 0 here. + config BLK_DEV_CRYPTOLOOP tristate "Cryptoloop Support" select CRYPTO --- linux-2.6/drivers/block/loop.c +++ linux-2.6-loop/drivers/block/loop.c @@ -82,7 +82,7 @@ static LIST_HEAD(loop_devices); static DEFINE_MUTEX(loop_devices_mutex); -static int max_part; +static int max_part = CONFIG_BLK_DEV_LOOP_MAXPART; static int part_shift; /*