libext2fs: add fs_offset entry to the undo header

The fs_offset entry stores the filesystem offset. This allows for an
easy undo, because one does not have to remember/specify the
filesystem offset manually.
The fs_offset entry is implemented as a compatible feature.

Signed-off-by: Marcus Huewe <suse-tux@gmx.de>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 file changed