linux-ext4 - Re: [RFC] A proposal for adding case insensitive lookups to ext4

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Message-ID: <20161107043035.GH28177@dastard>
Date:   Mon, 7 Nov 2016 15:30:35 +1100
From:   Dave Chinner <david@...morbit.com>
To:     Theodore Ts'o <tytso@....edu>
Cc:     Andreas Dilger <adilger@...ger.ca>,
        Ext4 Developers List <linux-ext4@...r.kernel.org>,
        guy@...ux.com, jra@...gle.com, drosen@...gle.com, hch@...radead.org
Subject: Re: [RFC] A proposal for adding case insensitive lookups to ext4

On Sun, Nov 06, 2016 at 07:14:56PM -0500, Theodore Ts'o wrote:
> I talked to Christoph at the Plumbers Closing party, and he suggested
> that we get something simple in first which (a) assumes no on-disk
> format changes, (b) does everything in the VFS layer, by using a
> MS_CASE_FOLD, uses a case-insensitive dentry hash, and which degrades
> to a brute force search in the VFS by using readdir interfaces if the
> direct lookup does not succeed, and (c) at least initially assumes
> only ASCII.
> 
> This could be extended by individual file systems who are willing to
> make on-disk format changes.

OK, as long people are ok with things going wonky when the
filesystem is mounted without those mount options, I'm not really
fussed...

Cheers,

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