linux-ext4 - Re: [v15 0/4] ext4: add project quota support

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Date:	Thu, 5 Nov 2015 15:13:10 +0000
From:	Shuichi Ihara <sihara@....com>
To:	Li Xi <pkuelelixi@...il.com>, Andreas Dilger <adilger@...ger.ca>,
	Theodore Ts'o <tytso@....edu>
CC:	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-ext4 <linux-ext4@...r.kernel.org>,
	Linux API <linux-api@...r.kernel.org>, Jan Kara <jack@...e.cz>,
	Al Viro <viro@...iv.linux.org.uk>,
	Christoph Hellwig <hch@...radead.org>,
	Dave Chinner <david@...morbit.com>,
	Дмитрий Монахов 
	<dmonakhov@...nvz.org>, Shuichi Ihara <ihashu@...il.com>
Subject: Re: [v15 0/4] ext4: add project quota support

Hello Ted, Andreas,



Shilong posted an email here a week ago below.
http://lists.openwall.net/linux-ext4/2015/10/30/2

we identified 10 project quota related xfstest and ported them into ext4/xxx.
test number are 304, 305, 299, 244, 196, 134, 108, 107, 106, 050 in xfs.


We ported 9/10 tests into ext4/xxx
ext4/050 ext4/106 ext4/107 ext4/108 ext4/196 ext4/244 ext4/299 ext4/400 ext4/401

please check https://github.com/wangshilong/xfstests

An another patch was not valid since quota utility is different.


In order to run ported tests, patched quota-tools and Li Xi ported patch of e2fsprogs required.
https://github.com/wangshilong/quota-tools/commits/project
http://lists.openwall.net/linux-ext4/2015/10/29/2

Thanks
Ihara

11/5/15, 11:45 PM , "linux-ext4-owner@...r.kernel.org (Li Xi の代理)" <linux-ext4-owner@...r.kernel.org (pkuelelixi@...il.com の代理)> wrote:

>On Fri, Sep 25, 2015 at 1:12 AM, Andreas Dilger <adilger@...ger.ca> wrote:
>> On Sep 13, 2015, at 2:20 PM, Li Xi <pkuelelixi@...il.com> wrote:
>>>
>>> The following patches propose an implementation of project quota
>>> support for ext4. A project is an aggregate of unrelated inodes
>>> which might scatter in different directories. Inodes that belong
>>> to the same project possess an identical identification i.e.
>>> 'project ID', just like every inode has its user/group
>>> identification. The following patches add project quota as
>>> supplement to the former uer/group quota types.
>>
>> We discussed this on the ext4 developer concall today and tried to
>> move the landing of these patches forward.  Some notes below:
>>
>> - Ted: agreed to reserve EXT4_FEATURE_RO_COMPAT_PROJECT, s_prj_quota_inum,
>>   EXT4_PROJINHERIT_FL, and i_projid fields for use by project quota to
>>   avoid compatibility issues if patches are not landed immediately.
>>    - Ted: to do final check of inode flag value
>>    - ext4 project quota inode does not need to use a reserved inode, but
>>      could after Jan's patch to increase reserved inodes lands
>> - Li Xi: identify xfstests subtests that are exercising project quota
>>    - submit patches to xfstests that will activate them for ext4
>>    - keep in ext4 xfstests for testing until patches land upstream
>>    - this needs to be done before landing to ensure ext4 code works
>> - Li Xi: document the behaviour of project quota (if no existing
>>   document exists for XFS already), some of this is already below
>>    - update man pages for df(1) and statfs(2) for subdir with project ID
>>      (i.e. that it returns only quota usage and limit for project ID)
>>    - Ted: where should document go? linux/Documentation/fs? ext4 wiki?
>>    - not a requirement for testing, can be done after landing
>>
>> - All: decide on a common tool for setting project ID on file/directory
>>    - don't want to require xfsutils in order to use project quota
>>    - start with chattr (using FS_IOC_FS{GET,SET}XATTR) in e2fsprogs
>>      - allows testing project quota with e2fsprogs/ext4
>>    - chproj (like chown/chgrp) would also be an option
>>      - needs more discussion/development effort, goes into fileutils
>>    - this doesn't need to be decided immediately, and both could be done
>>
>Hi,
>
>I've pushed the patch of Ext4 as well as e2fsprogs. Shilong has added test
>suits for ext4 project quota in xfstest, and will push patches soon. I
>will write
>necessary documentation both for manual and linux/Documentation/fs.
>
>Hopefully, at least the kernel patches of ext4 project quota will be merged
>soon.
>
>Regards,
>Li Xi
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