topic Re: How to build customised initrd with flexbuilder (Development Board NXP LS1028ARDB) in Layerscape

How to build customised initrd with flexbuilder (Development Board NXP LS1028ARDB)

mmxland — Sat, 25 Dec 2021 23:00:09 GMT

Hello.

I am trying to port vyos software router in LS1028ARDB.
I've compiled custom linux kernel and need to modify init script to mount overlayed filesystem. How can I edit initscript with flexbuilder (or other tools)? Maybe someone have experience in porting vyos on NXP boards?

Any help appreciated.
Thank you.

Re: How to build customised initrd with flexbuilder (Development Board NXP LS1028ARDB)

yipingwang — Tue, 28 Dec 2021 09:04:56 GMT

What initscript do you want to customize?

You could refer to the following procedure to generate ubuntu main rootfs.

$ flex-builder -i mkrfs

$ flex-builder -c apps

$ flex-builder -i merge-component

Modify init scripts in build/rfs/rootfs_lsdk2012_ubuntu_main_arm64

$ flex-builder -i packrfs

Re: How to build customised initrd with flexbuilder (Development Board NXP LS1028ARDB)

mmxland — Tue, 28 Dec 2021 16:12:37 GMT

Hello.
Thank you for answer.

I need a way to make some filesystem actions before actualy mounting root. I need to make some overlays and mount it as root.

Something like this:
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 32G 4.8G 26G 16% /usr/lib/live/mount/persistence
/dev/loop0 409M 409M 0 100% /usr/lib/live/mount/rootfs/1.4202108300430.squashfs
tmpfs 998M 0 998M 0% /usr/lib/live/mount/overlay
overlay 32G 4.8G 26G 16% /

Normaly linux boot process includes loading initrd image as starting point and launch init script making necessary preparation.
How can I acheave this?

Re: How to build customised initrd with flexbuilder (Development Board NXP LS1028ARDB)

yipingwang — Wed, 29 Dec 2021 08:00:44 GMT

You could edit /etc/fstab in rootfs filesystem to add the following.

/dev/sda1 /usr/lib/live/mount/persistence ext4 defaults 0 0