GNU bug report logs - #37977
Mount options ignored for root file system

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Guillaume Le Vaillant <glv <at> posteo.net>
Subject: bug#37977: closed (Re: bug#37977: Mount options ignored for root
 file system)
Date: Mon, 18 Nov 2019 10:33:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#37977: Mount options ignored for root file system

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 37977 <at> debbugs.gnu.org.

-- 
37977: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37977
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Guillaume Le Vaillant <glv <at> posteo.net>
Cc: 37977-done <at> debbugs.gnu.org
Subject: Re: bug#37977: Mount options ignored for root file system
Date: Mon, 18 Nov 2019 11:32:16 +0100

Hello Guillaume,

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

> The attached patch adds an 'options' parameter to
> 'mount-root-file-system' and makes 'boot-system' use it with the
> content of the 'options' field of the <file-system> object for "/".
> 
> It's not exactly the solution you described (adding a keyword argument
> to 'boot-system'), but I think it should work. What do you think?

It looks great to me.

> From 3597f0fda6f6a13bf1fdab0fcde4f72ece688d93 Mon Sep 17 00:00:00 2001
> From: Guillaume Le Vaillant <glv <at> posteo.net>
> Date: Sun, 17 Nov 2019 14:15:21 +0100
> Subject: [PATCH] linux-boot: Don't ignore options when mounting root file
>  system.
>
> * gnu/build/linux-boot.scm (mount-root-file-system): Add the 'options'
>   keyword argument and use it when mounting the root file system.
>   (boot-system): Pass the root file system options to
>   'mount-root-file-system'.

Applied, thanks!

Ludo’.

[Message part 3 (message/rfc822, inline)]

From: Guillaume Le Vaillant <glv <at> posteo.net>
To: bug-guix <at> gnu.org
Subject: Mount options ignored for root file system
Date: Tue, 29 Oct 2019 11:22:39 +0100

The filesystem options declared for the root file system are apparently
ignored. This happens for a btrfs root filesystem on a LUKS volume.


Exerpt from '/etc/config.scm":

--8<---------------cut here---------------start------------->8---
(mapped-devices
  (list (mapped-device
          (source
            (uuid "ee90b2aa-97e8-4ae5-ac72-9bf9058cc949"))
          (target "cryptroot")
          (type luks-device-mapping))
        (mapped-device
          (source
            (uuid "ec9cd327-0370-4e20-baa4-254d03b1901e"))
          (target "cryptguillaume")
          (type luks-device-mapping))))
(file-systems
  (cons* (file-system
           (mount-point "/")
           (device "/dev/mapper/cryptroot")
           (type "btrfs")
           (options "autodefrag,compress=lzo")
           (dependencies mapped-devices))
         (file-system
           (mount-point "/home/guillaume")
           (device "/dev/mapper/cryptguillaume")
           (type "btrfs")
           (options "autodefrag,compress=lzo")
           (dependencies mapped-devices))
         %base-file-systems))
--8<---------------cut here---------------end--------------->8---


Exerpt from '/etc/fstab':

--8<---------------cut here---------------start------------->8---
/dev/mapper/cryptroot / btrfs autodefrag,compress=lzo	
/dev/mapper/cryptguillaume /home/guillaume btrfs autodefrag,compress=lzo
--8<---------------cut here---------------end--------------->8---


Exerpt from '/etc/mtab':

--8<---------------cut here---------------start------------->8---
/dev/mapper/cryptroot / btrfs
  rw,relatime,ssd,space_cache,subvolid=5,subvol=/
  0 0

/dev/mapper/cryptguillaume /home/guillaume btrfs
  rw,relatime,compress=lzo,ssd,space_cache,autodefrag,subvolid=5,subvol=/
  0 0

/dev/mapper/cryptroot /gnu/store btrfs
  ro,relatime,ssd,space_cache,subvolid=5,subvol=/gnu/store
  0 0
--8<---------------cut here---------------end--------------->8---

Here we see that the options 'autodefrag' and 'compress=lzo' have
disappeared on the root filesystem. Maybe it has something to do with
the new '/gnu/store' subvolume that appeared?

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