I have my own file system which was developed in Linux kernel. I want to find out if Android uses VFS also because my file system is built under VFS and uses VFS interfaces. If not, I need to identify what I need to change about my file system to fit into Android.
Android uses a Linux kernel with some extensions and changes, but as far as I know, Android uses the file system part without changes. The default file system is for example ext4.
So your file system should work without much problems.