dansan:

Supply the following if possible:

• Device problem occurs on
  GSE MCG-101 (mt7620a board)

• Software versions of OpenWrt/LEDE release, packages, etc.
  v21.02

• Steps to reproduce
  Install a package with valid init.d script to rootfs with init script not enabled (via DISABLED_SERVICE variable or my CONFIG_NO_ENABLE_SERVICE patch which I haven't yet submitted).
  Attempt to enable the service via /etc/uci-defaults script via

I have a service that I enable in /etc/uci-defaults as long as prior initialization succeeds because I don't want it to try to start if there's a problem with prerequisites. I can see the it was executed because I'm logging this script and I've set -e:

+ /etc/rc.common /etc/init.d/sbd enable

Unfortunately, the service didn't start and instead I found a symlink at /tmp/root/upper/etc/rc.d/S57sbd, but not at /overlay/upper/etc/rc.d/S57sbd after init had completed and the jffs2 system was mounted. So something is going wrong, I presume in projects/fstools/mount_root.c jffs2_switch().