From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Subject: bug#37977: Mount options ignored for root file system
Date: Sun, 17 Nov 2019 11:43:39 +0100
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In-Reply-To: <87eeyjils5.fsf@yamatai> (Guillaume Le Vaillant's message of
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To: Guillaume Le Vaillant <glv@posteo.net>
Cc: 37977@debbugs.gnu.org

Hi Guillaume,

Guillaume Le Vaillant <glv@posteo.net> skribis:

> Guillaume Le Vaillant skribis:
>
>> The filesystem options declared for the root file system are apparently
>> ignored. This happens for a btrfs root filesystem on a LUKS volume.
>
> This also happens on a basic btrfs root file system (without LUKS).
>
> I tried adding "rootflags=3Ddefaults,autodefrag,compress=3Dlzo" in kernel
> arguments, but it didn't have any effect.

[...]

> I saw that the 'start' function of 'root-file-system-service-type'
> doesn't do anything. Is it on purpose? Or could we make it remount the
> root filesystem?

By definition, when shepherd is started, the root file system is already
mounted; that=E2=80=99s why the =E2=80=98start=E2=80=99 method of the =E2=
=80=98root-file-system-service=E2=80=99
does nothing.

The root file system is mounted by =E2=80=98mount-root-file-system=E2=80=99=
 in
linux-boot.scm, and you=E2=80=99re right: it happily ignores any options in=
 the
<file-system> object for =E2=80=9C/=E2=80=9D.  :-)

A solution would be to have =E2=80=98boot-system=E2=80=99 take an additional
#:root-file-system-options parameter that it would pass down to
=E2=80=98mount-root-file-system=E2=80=99, which would honor it.

Would you like to give it a try?

Thanks,
Ludo=E2=80=99.