[PATCH blktests 0/2] nvme: add nvme metadata passthrough test

[Shin'ichiro Kawasaki]

Keith contributed a test case to cover nvme metadata passthrough [1],
which confirms a kernel fix by the commit 43a67dd812c5 ("block: flip iter
directions in blk_rq_integrity_map_user()"). I made some slight
improvements on it and repost as this series. The first patch introduces
two helper functions to check requirements of the test target
namespaces. The second patch adds the test case.

[1] https://lore.kernel.org/linux-nvme/20250609154122.2119007-1-kbusch@meta.com/

P.S. When I ran blktests to confirm this patch using QEMU nvme
     namespaces with metadata as TEST_DEV, I found some existing test
     cases fail: nvme/034, 035, 049 and 053. Three of the test cases
     need improvements to avoid the failure. I'm preparing another
     series for it. The other test case nvme/053 shows weird fio
     failure. It passes with metadata size 8 bytes and 16 bytes (md=8 and
     md=16 QEMU options. But it fails when metadata size is 64 bytes
     (md=64). This needs some more debug effort.

Keith Busch (1):
  nvme: add nvme metadata passthrough test

Shin'ichiro Kawasaki (1):
  nvme/rc: introduce helper functions to check namespace metadata

 src/.gitignore              |   1 +
 src/Makefile                |   1 +
 src/nvme-passthrough-meta.c | 232 ++++++++++++++++++++++++++++++++++++
 tests/nvme/064              |  34 ++++++
 tests/nvme/064.out          |   2 +
 tests/nvme/rc               |  23 ++++
 6 files changed, 293 insertions(+)
 create mode 100644 src/nvme-passthrough-meta.c
 create mode 100755 tests/nvme/064
 create mode 100644 tests/nvme/064.out

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2.49.0