[PATCH v2 0/4] xfstests: test custom crypto data unit size

[Eric Biggers <ebiggers@kernel.org>]

This series adds a test that verifies the on-disk format of encrypted
files that use a crypto data unit size that differs from the filesystem
block size.  This tests the functionality that was introduced in Linux
6.7 by kernel commit 5b1188847180 ("fscrypt: support crypto data unit
size less than filesystem block size").

This depends on the xfsprogs patch
"xfs_io/encrypt: support specifying crypto data unit size"
(https://lore.kernel.org/r/20231013062639.141468-1-ebiggers@kernel.org)
which adds the '-s' option to the set_encpolicy command of xfs_io.

As usual, the test skips itself when any prerequisite isn't met.

I've tested the new test on both ext4 and f2fs.

Changed in v2:
- Updated the cover letter, commit message, and a comment to reflect
  that the kernel commit that added this feature was merged in 6.7.
- Rebased onto latest for-next branch of xfstests.

Eric Biggers (4):
  fscrypt-crypt-util: rename block to data unit
  common/rc: fix _require_xfs_io_command with digits in argument
  common/encrypt: support custom data unit size
  generic: add test for custom crypto data unit size

 common/encrypt           | 42 +++++++++++++-----
 common/rc                |  2 +-
 src/fscrypt-crypt-util.c | 93 ++++++++++++++++++++--------------------
 tests/f2fs/002           |  6 +--
 tests/generic/900        | 29 +++++++++++++
 tests/generic/900.out    | 11 +++++
 6 files changed, 123 insertions(+), 60 deletions(-)
 create mode 100755 tests/generic/900
 create mode 100644 tests/generic/900.out


base-commit: b9e1a88f8198ac02f3b82fe3b127d4e14f4a97b7
-- 
2.42.1