[PATCH 0/2] io_uring r/w with metadata

[Vincent Fu <vincentfu@gmail.com>]

These two patches add support for io_uring read and write operations for
block devices with metadata. The first patch adds this support to the
io_uring ioengine and the second patch adds a script for this feature
using NVMe devices.

This code has been tested on the kernel below:
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs-6.17.integrity

with the patch below applied

https://lore.kernel.org/linux-block/20250722120755.87501-1-anuj20.g@samsung.com/

This code has passed testing under the following settings:

QEMU NVMe device 512B data size; 8B, 16B, 64B metadata size; 16b Guard PI
QEMU NVMe device 4K data size; 16B, 64B metadata size, 64b Guard PI

I have not been able to run the following tests due to platform
issues:

QEMU NVMe device 4K data size; any metadata size; 16b Guard PI
   nvme format fails
scsi-debug device 
   module is loaded with dif=1,2,or 3 but PI support is not detected

Would appreciate help anyone can provide for the missing test platforms.

Vincent Fu (2):
  engines/io_uring: support r/w with metadata
  t/io_uring_pi: test script for io_uring PI

 engines/io_uring.c  | 241 ++++++++++++++++++++++++--
 engines/nvme.c      |  35 ++--
 engines/nvme.h      |  18 ++
 io_u.h              |   1 +
 os/linux/io_uring.h |  15 ++
 t/io_uring_pi.py    | 408 ++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 681 insertions(+), 37 deletions(-)
 create mode 100644 t/io_uring_pi.py

-- 
2.47.2