linux-ext4 - Re: [PATCH 5/5] XFS: prjquota and grpqouta now may coexist

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Message-ID: <20120622023612.GG10673@dastard>
Date:	Fri, 22 Jun 2012 12:36:12 +1000
From:	Dave Chinner <david@...morbit.com>
To:	Dmitry Monakhov <dmonakhov@...nvz.org>
Cc:	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 5/5] XFS: prjquota and grpqouta now may coexist

On Thu, Jun 21, 2012 at 01:08:53PM +0400, Dmitry Monakhov wrote:
> Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>
> ---
>  fs/xfs/xfs_super.c |    6 +++---
>  1 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> index 0d9de41..f408a27 100644
> --- a/fs/xfs/xfs_super.c
> +++ b/fs/xfs/xfs_super.c
> @@ -538,14 +538,14 @@ xfs_showargs(
>  	else if (mp->m_qflags & XFS_UQUOTA_ACCT)
>  		seq_puts(m, "," MNTOPT_UQUOTANOENF);
>  
> -	/* Either project or group quotas can be active, not both */
> -
>  	if (mp->m_qflags & XFS_PQUOTA_ACCT) {
>  		if (mp->m_qflags & XFS_OQUOTA_ENFD)
>  			seq_puts(m, "," MNTOPT_PRJQUOTA);
>  		else
>  			seq_puts(m, "," MNTOPT_PQUOTANOENF);
> -	} else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
> +	}
> +
> +	if (mp->m_qflags & XFS_GQUOTA_ACCT) {
>  		if (mp->m_qflags & XFS_OQUOTA_ENFD)
>  			seq_puts(m, "," MNTOPT_GRPQUOTA);
>  		else

Why can they co-exist now? XFS does not use the VFS quota
code, and you've made no other changes to XFS so I can't see how you
can make that assertion. There's a current patchset under review
that allows XFS to have co-existing group and project quotas - it's
complex, changes the on-disk format and requires userspace tool
support (e.g. mkfs, repair, xfs_db, etc).

So I can't see how this works with XFS at all...

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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