[PATCH v2 0/2] Make liveupdate selftests library

[Vipin Sharma <vipinsh@google.com>]

Hello,


This is v2 series of refactoring liveupdate selftests as a library. It
exposes common liveupdate ioctls as a library which can be used by other
selftests like VFIO and IOMMU.

Currently, there are no users of this change but it is being used in
VFIO and iommu liveupdate series.

  https://lore.kernel.org/kvm/20260323235817.1960573-15-dmatlack@google.com/
  https://lore.kernel.org/linux-iommu/20260427175633.1978233-17-skhawaja@google.com/

I think it is better to move the patches out from the above series and
propose them as a separate series for inclusion in liveupdate repo. That
way we can decouple multiple downstream dependencies and then it can be
used by VFIO, IOMMU, and KVM (guest_memfd preservation) separately.

v2:
 - Addressed Sashiko feedback regarding folder creation.
   https://sashiko.dev/#/patchset/20260511201155.1488670-1-vipinsh%40google.com
 - Update liveupdate.c test to use ioctl wrappers in library

v1: https://lore.kernel.org/all/20260511201155.1488670-1-vipinsh@google.com/
Vipin Sharma (2):
  selftests/liveupdate: Move luo_test_utils.* into a reusable library
  selftests/liveupdate: Add helpers to preserve/retrieve FDs

 tools/testing/selftests/liveupdate/.gitignore |  1 +
 tools/testing/selftests/liveupdate/Makefile   | 14 ++----
 .../include/libliveupdate.h}                  | 10 +++--
 .../selftests/liveupdate/lib/libliveupdate.mk | 20 +++++++++
 .../{luo_test_utils.c => lib/liveupdate.c}    | 43 ++++++++++++++-----
 .../testing/selftests/liveupdate/liveupdate.c | 40 ++++++-----------
 .../selftests/liveupdate/luo_kexec_simple.c   |  2 +-
 .../selftests/liveupdate/luo_multi_session.c  |  2 +-
 .../selftests/liveupdate/luo_stress_files.c   |  2 +-
 .../liveupdate/luo_stress_sessions.c          |  2 +-
 10 files changed, 81 insertions(+), 55 deletions(-)
 rename tools/testing/selftests/liveupdate/{luo_test_utils.h => lib/include/libliveupdate.h} (80%)
 create mode 100644 tools/testing/selftests/liveupdate/lib/libliveupdate.mk
 rename tools/testing/selftests/liveupdate/{luo_test_utils.c => lib/liveupdate.c} (91%)


base-commit: 3a358c78093f98a70d84c934b7054f636bc846f2
-- 
2.54.0.1099.g489fc7bff1-goog