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Date:      Thu, 26 Mar 2015 23:56:00 -0300
From:      Pedro Arthur <bygrandao@gmail.com>
To:        d@delphij.net
Cc:        "<freebsd-hackers@freebsd.org>" <freebsd-hackers@freebsd.org>, John-Mark Gurney <jmg@funkthat.com>
Subject:   Re: GELI support on /boot folder
Message-ID:  <CAKN1MR5ghmoNn30=mvXwf89LYd9HhTALGXziMrxMct62W48r-w@mail.gmail.com>
In-Reply-To: <55149E70.30608@delphij.net>
References:  <CAKN1MR54TCWZa_wSLAe63fxVF6248yr_aKkg-T0WtxHzaiLkyw@mail.gmail.com> <20150319013231.GR51048@funkthat.com> <55149E70.30608@delphij.net>

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I think that encrypting the boot folder will protect the boot
configurations, kernel and kernel modules from being changed.

> If we make changes to loader more often, it could be a bad idea
> because merging both parties would make it harder for those who
> develop loader changes.
>
> Additionally, it may be desirable to keep different copies of loaders
> in different "boot environment" datasets, it's more convenient for
> debugging: let's say one developer decided to make some changes to ZFS
> support of loader, and that's installed to a new boot environment,
> then they can try it out without making a usable boot disk at hand
> before hand.  Once the zfsloader is proven to be working (we still
> have zfsloader.old or a different boot environment available), we
> would have much more confident that the system will boot after a
> gptzfsboot update because they share the same code.
>
> I agree with you, but the boot2 has already reached its size limit.For
example if you try to compile the boot2 with clang < 3.5 (>=3.5 uses the
enable-gvn flag) you will get an error saying boot2 exceeded its max size by
~20 bytes. I can't see other way to do it without merging.



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