[extfs] status report 7

[gnehzuil]

Status:

 * Now ext2fs can read ext4 extents in read-only mode. However, It has a 
bug, which can not support mmap(2) system call because I have not 
finished ext2_bmap() function.

Plan for next week:

 * Implement ext2_bmap() function to support mmap(2) system call. Then 
ext2fs can support to read ext4 extents completely.

 * Implement dir_nlink and uninit_bg features. But I am not sure these 
features need to be required in read-only mode. If they don't be 
requried, I will try to implement flex_bg feature.


lz