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Subject: Re: [RFD] Common userspace tool for fscypto
To: Michael Halcrow <mhalcrow@google.com>
References: <0bef3877-060e-b722-0354-3a5508219e23@nod.at>
 <CA+POJK10M3_GhP_Ge4qkQF4gSNMUXVr5kem9Ak4EDmVRvRUg7g@mail.gmail.com>
Cc: linux-fsdevel <linux-fsdevel@vger.kernel.org>, kzak@redhat.com,
        "Theodore Ts'o" <tytso@mit.edu>, Jaegeuk Kim <jaegeuk@kernel.org>,
        Eric Biggers <ebiggers@google.com>, David Gstir <david@sigma-star.at>,
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From: Richard Weinberger <richard@nod.at>
Message-ID: <cdd8d83f-bdc8-df01-1230-8cfb9ec4c8fb@nod.at>
Date: Mon, 24 Oct 2016 13:59:57 +0200
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Michael,

On 19.10.2016 19:36, Michael Halcrow wrote:
> On Wed, Oct 19, 2016 at 4:35 AM, Richard Weinberger <richard@nod.at> wrote:
>> Hi!
>>
>> Since file level encryption has more than one user, currently ext4, f2fs and soon ubifs
>> it would be nice to have a single tool to control fscrypto from userspace.
>>
>> For ext4 we have already at least two tools, one as part of e2fsprogs and another
>> one on github[0]. IMHO the latter one is much more user friendly and intuitive to use.
>> I as unable to find the userspace tool for f2fs.
>>
>> That said, what about implementing such a tool as part of util-linux to control
>> fscrypto? We (David and I) would volunteer.
> 
> While discussing several changes we have staged for release (we're
> trying to minimize churn by batching a large set of format changes all
> at once), we've recently recognized this need on my team and were
> planning on starting work on exactly what you propose.

Can you please some details?
Will it be GPL? Part of util-linux?
What features does it have?
I hope more than just being a wrapper to the ioctls().

Thanks,
//richard