[PATCH v4 0/2] pending chunk allocation EEXIST fix

[Boris Burkov <boris@bur.io>]

Fix a somewhat convoluted bug in chunk allocation with non consecutive
pending extents. Also, add unit tests covering the new search functions
and fix a build warning

Changelog:
v4:
- fold the build warning fix into the unit test patch
- clean up subtle and not-so-subtle coding style issues I missed in the
  AI generated test boilerplate.
v3:
- fix build warning when CONFIG_BTRFS_FS_RUN_SANITY_TESTS is not set
v2:
- change the semantics of btrfs_find_hole_in_pending_extents to return
  the largest hole on failure. A different bug in the implementation of
  the incorrect v1 semantics was hiding this.
- add the unit tests
- add the build warning fix


Boris Burkov (2):
  btrfs: fix EEXIST abort due to non-consecutive gaps in chunk
    allocation
  btrfs: unit tests for pending extent walking functions

 fs/btrfs/Makefile                       |   3 +-
 fs/btrfs/tests/btrfs-tests.c            |   3 +
 fs/btrfs/tests/btrfs-tests.h            |   1 +
 fs/btrfs/tests/chunk-allocation-tests.c | 476 ++++++++++++++++++++++++
 fs/btrfs/volumes.c                      | 246 +++++++++---
 fs/btrfs/volumes.h                      |   6 +
 6 files changed, 673 insertions(+), 62 deletions(-)
 create mode 100644 fs/btrfs/tests/chunk-allocation-tests.c

-- 
2.52.0