[On-Going]Enable USB Printer Share on XiaoMi Router

I have a mission, to enable USB Printer share on XiaoMi Router. This sharing document is still on-going, I have not successfully made it yet.

Pre-requisite
1) Have a not too small spaces to work on. Enabling package and kernel need more spaces.
2) kmod-usb-printer
3) modify /etc/opkg.conf, comment out dest and overlay that makes /data become root, replace it as ur rootfs

1) Enable SSH features for XiaoMi Router. Note: It will void warranty.
2) Make sure usb.essential enabled. http://wiki.openwrt.org/doc/howto/usb.essentials
3)

Optional
1) Enable kmod-fs-hfs and kmod-fs-hfsplus to support apple type filesystem