linux-ext4 - Re: [PATCH 1/4] Adds general codes to enforces project quota limits

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Date:	Wed, 24 Sep 2014 10:13:06 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Jan Kara <jack@...e.cz>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Li Xi <pkuelelixi@...il.com>, linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org, linux-api@...r.kernel.org,
	tytso@....edu, adilger@...ger.ca, viro@...iv.linux.org.uk,
	dmonakhov@...nvz.org
Subject: Re: [PATCH 1/4] Adds general codes to enforces project quota limits

On Wed, Sep 24, 2014 at 07:10:20PM +0200, Jan Kara wrote:
>   Yeah, I'm aware of that but I decided I won't bother Li Xi with that
> since it's independent issue and 8 bytes aren't that terrible.

For the inode of which we have so many instances it is.  Especially when
only one filesystem can make use of this new field.
 
> Personally
> I somewhat prefer what I did in
> http://www.spinics.net/lists/linux-fsdevel/msg74927.html
> where we don't introduce additional method but rather a table with field
> offsets in superblock. If people agree with this, I can cook up a patch for
> quota relatively quickly.

There's an even better way.  We stopped calling the dquot_* functions
from generic code, so now the filesystem can simply pass in a pointer
to the dquot array.

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