From owner-freebsd-fs@FreeBSD.ORG Sun Mar 25 02:32:16 2012 Return-Path: Delivered-To: freebsd-fs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 00E6A106566C for ; Sun, 25 Mar 2012 02:32:16 +0000 (UTC) (envelope-from pfg@FreeBSD.org) Received: from nm27-vm0.bullet.mail.bf1.yahoo.com (nm27-vm0.bullet.mail.bf1.yahoo.com [98.139.213.139]) by mx1.freebsd.org (Postfix) with SMTP id A248D8FC19 for ; Sun, 25 Mar 2012 02:32:15 +0000 (UTC) Received: from [98.139.212.147] by nm27.bullet.mail.bf1.yahoo.com with NNFMP; 25 Mar 2012 02:32:15 -0000 Received: from [98.139.211.201] by tm4.bullet.mail.bf1.yahoo.com with NNFMP; 25 Mar 2012 02:32:15 -0000 Received: from [127.0.0.1] by smtp210.mail.bf1.yahoo.com with NNFMP; 25 Mar 2012 02:32:15 -0000 X-Yahoo-Newman-Id: 135946.76426.bm@smtp210.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: kA.NdO0VM1nrhe4a9i6le_W83YtQHNS05l5cTasGzjB_9Wj SJgLdUr1aYq91CZFaywLyJ6kudcml6B9FKrXFB9UMId1S2L.xQ4Td.7Axnjh sX4R2t_QIDCyLMPKvgk5W0RHLan_QtPBm8Jv2h59mSx3JpxCA9emkGseVPGs Ccr5lZZAMlAGB4GIDxPXTEjozOz1h_92_oM92_e_.WfKz9v0gQyznMbRL6zU mWzjHekcYPGpdG4P5Q5AADA.CVJDswpEZCqI1zKSir7T7iYQ_9MypID.oU9w L2FfLY6j5UsR1Va5Z4u6Og9UXzfcug0ADXEEozoCO4L_l2oSs0v0nJuSKAm8 URRXpUbwc4aXMdxrVSp2jLVrhJBQCfeasMpuooKH3L4P7GlpVrszUK3p12nO _LVvjEdvXqtIdYhU0JfdbddrDJVeQRxZrpVFV0amv2M6l119aM7xonu0W0IL ZCsa0cCY6y2H81l7VdA9EVcLXkczwhVUULTgTeq4GtwZU8uexUEPIFsx1Aqg 9mWX8UomlRHyK3lS1wZFUdIAjYsDh4r1gqpqktXUfUQ-- X-Yahoo-SMTP: xcjD0guswBAZaPPIbxpWwLcp9Unf Received: from [192.168.10.102] (pfg@200.118.157.7 with plain) by smtp210.mail.bf1.yahoo.com with SMTP; 24 Mar 2012 19:32:14 -0700 PDT Message-ID: <4F6E83AD.5040403@FreeBSD.org> Date: Sat, 24 Mar 2012 21:32:13 -0500 From: Pedro Giffuni User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:10.0.2) Gecko/20120226 Thunderbird/10.0.2 MIME-Version: 1.0 To: freebsd-fs@FreeBSD.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Subject: Re: [patch] ext4fs read only mode X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Mar 2012 02:32:16 -0000 Hello; On Aug. 22 2010 Zheng Liu posted a patch to add read-only support for ext4 extents in our ext2fs driver that was part of his GSoC. The ext2fs module has received many enhancements, mainly to make it look and behave more like the base UFS1 and the old patch doesn't apply anymore. I updated the patch just cleaning up some things that are not strictly necessary and adapting it to the underlying changes. http://people.freebsd.org/~pfg/patches/patch-ext2-extents The patch should apply cleanly in both 10-current and 9-stable. No review of this patch has been done, beyond compiling on amd64, and I have no idea if it works at all. AFAICT, there was no feedback on the original patch so I am actually wondering if this feature is desired at all. I will be glad to keep it around for a while and eventually update it but committing it is not yet in the horizon until we see more interest and at least some testing. best regards, Pedro.