fs/btrfs/TODO

   1 * cleanup, add more error checking, get rid of BUG_ONs
   2 * Fix ENOSPC handling
   3 * Add block mapping tree (simple dm layer)
   4 * Make allocator smarter
   5 * add a block group to struct inode
   6 * Make sure nobh stuff is working properly for cows
   7 * Do actual block accounting
   8 * Check compat and incompat flags on the inode
   9 * Add virtual filesystems, mountable snapshots
  10 * Get rid of struct ctree_path, limiting tree levels held at one time
  11 * EEXIST for dirs instead of hash overflow
  12 * Release
  13 * Do real tree locking
  14 * Add extent mirroring (backup copies of blocks)
  15 * Add fancy interface to get access to incremental backups
  16 * Add fancy striped extents to make big reads faster
  17 * Use relocation to try and fix write errors
  18 * Make allocator much smarter
  19 * xattrs (directory streams for regular files)
  20 * fsck
  21 * Scrub & defrag
  22
  23 ---
  24 metata FS ideas:
  25 mount metadata FS on /sys/fs/btrfs/dev/
  26 subvolumes in /sys/fs/btrfs/dev/fs/
  27 snapshots in /sys/fs/btrfs/dev/fs/snapshots
  28 mount -o bind
  29 ioctl to create a snapshot