I'm starting this topic because I had a hard time finding this answer to my question about how to resize a squashfs file system on a microSD card (in this case, for a Banana Pi R2-Pro).
This worked for me:
https://openwrt.org/docs/guide-user/advanced/expand_root
It had worked. Now not so much.
You mean the script isn't producing any error messages at all ?
Correct. Didn't work with squashfs. No error messages.
Mucking around revealed that the partition was resized, but the filesystem was not. Attempts to manually resize it didn't work; superblock issues.
Just retried with a fresh ext4 image. That did work.
Made another attempt at using the script with a SquashFS image. No bueno (didn't work).
Again, the script properly resized the partition but not the filesystem. No errors reported by the script.
I was able to resize it manually by booting the board off a different device (microSD in this case) and using the tools onboard to fsck and resize.
losetup -o XXYYZZ /dev/loop0 /dev/mmcblk1p2
fsck.f2fs /dev/loop0
resizefs /dev/loop0
Where XXYYZZ is the offset reported earlier by running losetup on /dev/loop0 when OpenWrt was running off it.
Then I did this for SquashFS:
They had changed to ext4 journaling I think can not be resized.https://github.com/openwrt/openwrt/commit/f9f2426e398cf74d1098ae40317bfba677ac7560
ext4 (journalling or not) can be resized, you can even grow it online (shrinking only offline).