newfs_ext2fs support for EXTRA_ISIZE - not yet bunch of bin ext2 bugs - fsck_ext2fs et.al. 64bit support meta data support - maybe only affects dirs and raises limit on max.filesystem? fix ext4.wiki - h_reserved[2] should actually be h_reserved[3] according to ext4 code xattr - dont forget refcount handling , with hash map (same as linux) - use roundup2() instead of custom macros EXTENTS: check if the inode_ext extents cache is actually used optimalization - on sync, only overwrite changed cgs? adv for bigger filesystems remove dup e2fs_mnton from m_fs maybe return limit to 32000 links for !DIR_NLINK fs (cross-check what Linux ext4 code) QUOTA support ? INODE_DATA support? (even linux is dev only)