[PATCH v2 00/10] btrfs-progs: mkfs fixes and prep work for extent tree v2

[Josef Bacik <josef@toxicpanda.com>]

v1->v2:
- Rebase onto devel+block group used patches.
- Dropped MKFS_SUPER_BLOCK as suggested by Qu.
- Make sure to recow the free space root now that we're generating it at
  make_btrfs() time.
- Rewored the titles to include the target area.
- Dropped "btrfs-progs: allocate blocks from the start of the temp system chunk"
  as it is no longer needed with the MKFS_SUPER_BLOCK dropping.
- Add a patch to make sure ->ref_cows and ->track_dirty is set properly on roots
  if we read roots directly.

--- Original email ---
Hello,

In order to reduce the amount of pain the reviewers have to endure I'm going to
be sending any prepatory patches separately from the actual feature work.

To that end this is the first batch of preparatory patches.  These are to make
working with mkfs a lot easier for the changes I'm making.  These are all fixes
or enhancements that can apply currently.  The only thing that is extent tree v2
specific is the last patch, which adds the incompat flag.

I've added the patch for the incompat flag because I will have other preparatory
patches that add helpers that essentially do

if (!btrfs_fs_incompat(fs_info, EXTENT_TREE_V2))
	/* Do the old thing. */

and then have patches after that add the extent tree v2 magic.  I think this
will make it easier to break up the work, but if we're not comfortable reserving
the bit then I'm fine with dropping that last patch.  It will just mean future
prep work will have to come along with the feature enablement patches.

I've tested this with make test to validate I didn't break anything.  Thanks,

Josef

Josef Bacik (10):
  btrfs-progs: mkfs: use an associative array for init blocks
  btrfs-progs: mkfs: get rid of MKFS_SUPER_BLOCK
  btrfs-progs: mkfs: use blocks_nr to determine the super used bytes
  btrfs-progs: mkfs: set nritems based on root items written
  btrfs-progs: mkfs: add helper for writing empty tree nodes
  btrfs-progs: make sure track_dirty and ref_cows is set properly
  btrfs-progs: mkfs: add the block group item in make_btrfs()
  btrfs-progs: add add_block_group_free_space helper
  btrfs-progs: mkfs: generate free space tree at make_btrfs() time
  btrfs-progs: add the incompat flag for extent tree v2

 kernel-shared/ctree.h           |   1 +
 kernel-shared/disk-io.c         |   5 +-
 kernel-shared/extent-tree.c     |   2 +
 kernel-shared/free-space-tree.c |  26 ++++
 kernel-shared/free-space-tree.h |   2 +
 mkfs/common.c                   | 212 ++++++++++++++++++++++++--------
 mkfs/common.h                   |  19 ++-
 mkfs/main.c                     |  24 ++--
 8 files changed, 224 insertions(+), 67 deletions(-)

-- 
2.26.3