linux-ext4 - Re: [RFC PATCH 0/8] Ext4 encryption support for blocksize

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Message-ID: <20180113124842.GA15364@bombadil.infradead.org>
Date:   Sat, 13 Jan 2018 04:48:42 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Chandan Rajendra <chandan@...ux.vnet.ibm.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>, linux-ext4@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, tytso@....edu
Subject: Re: [RFC PATCH 0/8] Ext4 encryption support for blocksize < pagesize

On Sat, Jan 13, 2018 at 10:58:00AM +0530, Chandan Rajendra wrote:
> On Saturday, January 13, 2018 12:37:59 AM IST Randy Dunlap wrote:
> > On 01/12/18 06:11, Chandan Rajendra wrote:
> > > This patchset implements code to support encryption of Ext4 filesystem
> > > instances that have blocksize less than pagesize. The patchset has
> > > been tested on both ppc64 and x86_64 machines.
> > 
> > strictly "less than" or "less than or equal to"?
> 
> I have tested the patchset for the use cases of "less than or equal to
> page size" i.e. On ppc64, the patchset was tested with blocksizes of 
> 4k and 64k. On x86_64, the patchset was tested with blocksizes of 2k 
> and 4k.

I think there's a miscommunication here.  ext4 already supports encryption
of filesystems with block size == page size.  Chandan is adding support
for encrypting filesystems with block size < page size.  Without removing
support for block size == page size ;-)