[PATCH v2 0/2] btrfs: enhance BTRFS_ORDERED_* flags sanity checks

[Qu Wenruo <wqu@suse.com>]

[CHANGELOG]
v2:
- Minor grammar fixes
- Change the output message when overlapping OEs are found
- Use has_single_bit_set() to replace hweight*()


During my development of introduce a new DELAYED type, I incorrectly
called something like:

	oe = alloc_ordered_extent(.., BTRFS_ORDERED_DELAYED, ..);

That doesn't trigger any warning at runtime, but will cause unexpected
bugs due to the fact that, BTRFS_ORDERED_* can not be directly used as a
flag. They are only bit numbers, thus should be utilized with bit
operations like "test_bit(BTRFS_ORDERED_DELAYED, ..)".

My stupid bug inspired me to enhance the @flags sanity checks in
alloc_ordered_extent().

The first one is to make sure that my stupid bug can always be caught
early.

The second one is to enhance the error message when a duplicated OE is
found during insert_ordered_extent().

Qu Wenruo (2):
  btrfs: check type flags in alloc_ordered_extent()
  btrfs: output more info when duplicated ordered extent is found

 fs/btrfs/ordered-data.c | 24 +++++++++++++++---
 fs/btrfs/ordered-data.h | 55 +++++++++++++++++++++++------------------
 2 files changed, 52 insertions(+), 27 deletions(-)

-- 
2.53.0