Hi All,

I am writing a sample driver to read the EXT4 on disk data structures .

I am able to read the superblock and the group descriptors,but iam facing issues while reading the inode and block bitmaps,and also the inode table.

Can someone help me in understanding how to read these from the disk and when these bitmaps are updated on disk?

Also can anyone help me understand how journalling works in ext4?