[PATCH 0/6] btrfs-progs: better space_cache=v2 support

[Omar Sandoval <osandov@osandov.com>]

From: Omar Sandoval <osandov@fb.com>

Hi,

This series implements some support for space_cache=v2 in btrfs-progs.
In particular, this adds support for `btrfs check --clear-space-cache v2`,
proper printing of the free space tree flags for `btrfs inspect-internal
dump-super`, and better documentation.

We'd previously talked about always making btrfs-progs always invalidate
the free space tree when doing write operations, but I decided that this
should be an action explicitly requested by the user. It'd also be
unsafe if using a kernel without the free space tree valid bit support,
which is why I didn't implement a `btrfs check --invalidate-free-space-cache`
option. Doing the full clear is always safe.

Still missing is full read-write support, but this should hopefully
cover most btrfs-progs usage.

Thanks!

Omar Sandoval (6):
  btrfs-progs: add the FREE_SPACE_TREE_VALID compat_ro bit definition
  btrfs-progs: format FREE_SPACE_TREE{,_VALID} nicely in dump-super
  btrfs-progs: add OPEN_CTREE_INVALIDATE_FST flag
  btrfs-progs: add btrfs_clear_free_space_tree() from the kernel
  btrfs-progs: implement btrfs check --clear-space-cache v2
  btrfs-progs: document space_cache=v2 more thoroughly

 Documentation/btrfs-check.asciidoc | 14 +++---
 Documentation/btrfs-man5.asciidoc  | 43 +++++++++++--------
 chunk-recover.c                    |  2 +-
 cmds-check.c                       | 34 +++++++++++----
 cmds-inspect-dump-super.c          | 24 +++++++++++
 ctree.h                            | 19 +++++++++
 disk-io.c                          | 28 +++++++-----
 disk-io.h                          |  8 +++-
 extent-tree.c                      | 10 +++++
 free-space-tree.c                  | 87 ++++++++++++++++++++++++++++++++++++++
 free-space-tree.h                  |  1 +
 root-tree.c                        | 22 ++++++++++
 12 files changed, 248 insertions(+), 44 deletions(-)

-- 
2.10.2