Needs: make an ext2/3 File System without datablock, just keep the other part, save the attribute of file or directory and discard the data of them. When write it, just return and when read it, just return all zero.
I download e2fsprogs-1.42.11.tar.gz from http://e2fsprogs.sourceforge.net/ , now I have some problem.

Ubuntu 14.04 with kernel 3.13.0-32-generic

1. After I execute "./configure" in the e2fsprogs-1.42.11, I execute "make" in folder misc but it was interrupted with "make: *** No rule to make target `../lib/ext2fs/ext2_err.h', needed by `mke2fs.o'. Stop." Help！！！

2. First I want find the code that format the partition where I can change it to discard datablock. The file "mk2fs.c" confuesd me, could someone tell me whether what I do is right or not and how to do it.

Any help will be appreciated and than you guys in advance!

e2fsprogs progs create and modifies some paratemeters of filesystem.
But linux kernel is the one which reads or writes data on the filesystem.
It would be a long way to accomplish what you need.

Thanks for your time.
About the part of kernel, I think what I should do is just change the read and write function.
And I should format the partition to what I want first.