* Check compat and incompat flags on the inode
* Get rid of struct ctree_path, limiting tree levels held at one time
* Add generation number to key pointer in nodes
-* Add parent pointer back to extent map.
+* Add generation number to inode
+* forbid cross subvolume renames and hardlinks
* Release
* Do real tree locking
* Add extent mirroring (backup copies of blocks)
* Use relocation to try and fix write errors
* Make allocator much smarter
* xattrs (directory streams for regular files)
-* fsck
* Scrub & defrag