On Sat 2021-09-25 @ 09:56:21 AM, Markus Volk wrote:

Am 23.09.21 um 22:55 schrieb Trevor Woerner:

We can add the --use-uuid line to the /boot entry if you really think it
should be mounted on boot, but we shouldn't use it on the others and cause wic
to generate a bad fstab. There are examples of other boards that don't mount
/boot by default (raspi for sure, and I think bbb too).

Could the solution be as simple as this?

Probably.

You'll need to re-send this with a better subject line and commit
message so the right people will notice it. Otherwise they'll think it's
meta-rockchip-specific.

From b8ba56d84fbac53901e5b7ca122498320e51fbf4 Mon Sep 17 00:00:00 2001
From: MarkusVolk <f_l_k@...>
Date: Sat, 25 Sep 2021 09:21:15 +0200
Subject: [PATCH] wic:direct.py: improve filter for fstab update

Signed-off-by: MarkusVolk <f_l_k@...>
---
scripts/lib/wic/plugins/imager/direct.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/lib/wic/plugins/imager/direct.py b/scripts/lib/wic/plugins/imager/direct.py
index 9d10ec01d0..15fa47356f 100644
--- a/scripts/lib/wic/plugins/imager/direct.py
+++ b/scripts/lib/wic/plugins/imager/direct.py
@@ -117,7 +117,7 @@ class DirectPlugin(ImagerPlugin):
updated = False
for part in self.parts:
if not part.realnum or not part.mountpoint \
- or part.mountpoint == "/":
+ or part.mountpoint == "/" or not part.mountpoint.startswith('/'):
continue
if part.use_uuid:
--
2.25.1

With this patch wic only adds the /boot mountpoint. The invalid entries get filtered out.
We would then only need to set --use-uuid for /boot to avoid the system from crashing if
'no-fstab-update' isn't expicitly given as an argument

If (when) this patch gets applied upstream, then we can remove our
work-around.

This is a fantastic find, I'm guessing other BSP layers might find it useful.
I was thinking of investigating adding a per-line "--no-fstab" option to wic
to indicate specific lines not desired in the fstab, but this looks much
nicer.