From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:43382 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753549AbdIDMaX (ORCPT ); Mon, 4 Sep 2017 08:30:23 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v84CS9I4056313 for ; Mon, 4 Sep 2017 08:30:23 -0400 Received: from e23smtp01.au.ibm.com (e23smtp01.au.ibm.com [202.81.31.143]) by mx0a-001b2d01.pphosted.com with ESMTP id 2cs0kum36y-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 04 Sep 2017 08:30:22 -0400 Received: from localhost by e23smtp01.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 4 Sep 2017 22:30:20 +1000 Received: from d23av06.au.ibm.com (d23av06.au.ibm.com [9.190.235.151]) by d23relay06.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v84CUH1V43122908 for ; Mon, 4 Sep 2017 22:30:18 +1000 Received: from d23av06.au.ibm.com (localhost [127.0.0.1]) by d23av06.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v84CUHKx005027 for ; Mon, 4 Sep 2017 22:30:17 +1000 From: Chandan Rajendra Subject: Re: [PATCH 00/42] mkfs: factor the crap out of the code Date: Mon, 04 Sep 2017 18:01:02 +0530 In-Reply-To: <20170829235052.21050-1-david@fromorbit.com> References: <20170829235052.21050-1-david@fromorbit.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Message-Id: <3637079.ALR5oY5V5m@localhost.localdomain> Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: Dave Chinner Cc: linux-xfs@vger.kernel.org On Wednesday, August 30, 2017 5:20:10 AM IST Dave Chinner wrote: > Everyone who tries to modify mkfs quickly learns that it is a pile > of spaghetti, the only difference in opinion is whether it is a > steaming, cold or rotten pile. This patchset attempts to untangle > the ball of pasta and turn it into a set of clear, obvious > operations that lead to a filesystem being formatted correctly. > > The patch series is really in three parts, splitting the code up > into roughly three modules. The first part introduces a mkfs > parameters structure and factors the on-disk formatting code to use > only information in that structure. The second part introduces a > command line input structure and factors the input parsing to use > it. This requires a bunch of temporary code to keep the rest of > the code working. The third part is factoring the input validation > and geometry calculation code to use the input structure and put > the output into the mkfs parameter structure and to remove all the > temporary support code. > > The result is three modules - input parsing, validation+calculations > and formatting - with well defined data flow between them. This also > paves the way to supporting config files to set defaults via a > separate (new) module. The overall data flow now looks like this: > > Build defaults --\ > ---> mkfs_default_params -> CLI -> mkfs_params > config file -----/ > > It is not worth spending a lot of time reviewing the temporary code > that is added - it gets removed before the end of the series. No > attempt has been made to ensure that mkfs works 100% correctly after > each patch is applied - the only guarantee is that it will build > cleanly. It /should/ work if a bisect lands in the middle of the > series, but trying to exhaustively test each patch is OK would take > more effort than it is worth. As such, testing has only been > performed on the whole series. > > The new output from mkfs to indicate where it has sourced the > defaults from causes xfstests to have conniptions. This requires > some updates to the mkfs output filters that are already in place > but it is a fairly trivial update. Test xfs/191 has a couple of new > failures, but that is because the new code now correctly parses > things like agsize so that block and sector size based > specifications work with default mkfs values. This will require test > updates. > > Future work will be to split the xfs_mkfs.c file into a file per > module (i.e. seperate files for CLI parsing, mkfs formating, > validation+calculation and, finally, one for config file support), > but otherwise the majority of the factoring work is now complete. > > Comments, flames, etc all welcome. Hi Dave, I am trying to test the "mkfs refactor" patchset on a ppc64 machine. But "git am ~/mkfs-xfs-rewrite/\[PATCH\ 03_42\]\ mkfs_introduce\ a\ structure\ to\ hold\ CLI\ options.mbox" fails to apply cleanly on top of xfsprogs/master (with patches 01 and 02 already applied) branch. Can you please let me know the id of the topmost commit on which the "mkfs refactor" patches are applied? -- chandan