linux-kernel - Re: [PATCH 0/3] xfs: change available ranges in quota check

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Date:	Fri, 27 Jan 2012 09:04:53 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	HAYASAKA Mitsuo <mitsuo.hayasaka.hu@...achi.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, xfs@....sgi.com,
	xfs-masters@....sgi.com, Ben Myers <bpm@....com>,
	Alex Elder <aelder@....com>, Christoph Hellwig <hch@....de>
Subject: Re: [PATCH 0/3] xfs: change available ranges in quota check

On Fri, Jan 27, 2012 at 11:02:11PM +0900, HAYASAKA Mitsuo wrote:
> Hi Christoph,
> 
> I'd like to explain the reason why I sent the patch series.
> 
> Here is an example where I activated user quota and set each softlimit and
> hardlimit as follows.
> 
>        | softlimit | hardlimit 
> -------------------------------
>  block |    1M     |    2M
> -------------------------------
>  inode |     3     |     5
> 
> I succeeded to create files up to the inode hardlimit using touch command.
> The quota information is shown as follows.
> 
> # xfs_quota -x -c 'report -u -b -i -h' /mnt/xfs2
> User quota on /mnt/xfs2 (/dev/vdb)
>                         Blocks                            Inodes              
> User ID      Used   Soft   Hard Warn/Grace     Used   Soft   Hard Warn/Grace  
> ---------- --------------------------------- --------------------------------- 
> root            0      0      0  00 [------]      3      0      0  00 [------]
> xfstest01       0     1M     2M  00 [------]      5      3      5  00 [6 days]
> 						 ~~~~	        ~~
> 
> However, I failed to create and add another file due to the quota limitation.
> 
> $ touch /mnt/xfs2/dir00/file05
> touch: cannot touch `/mnt/xfs2/dir00/file05': Disk quota exceeded
> 
> It seems the inode quota works well.
> 
> Regarding the block quota, I got the quota limitation message even if I
> created a 2MB file which is equal to the hardlimit of disk quota.
> 
> $ dd if=/dev/zero of=/mnt/xfs2/dir00/file01 bs=2M count=1
> dd: writing `/mnt/xfs2/dir00/file01': Disk quota exceeded
> 1+0 records in			     ~~~~~~~~~~~~~~~~~~~~~
> 0+0 records out
> 2093056 bytes (2.1 MB) copied, 0.00561516 s, 373 MB/s
> 
> I'd like to change the available range of the block quota, and
> also change the inode quota check to the same way as the block check
> introduced in PATCH 2/3 to make it more general.

Makes sense.  Can you create an xfstests testcase containing the above
test case?

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