[PATCH v4 0/5] io_uring passthrough for nvme

[Kanchan Joshi <joshi.k@samsung.com>]

This iteration is against io_uring-big-sqe brach (linux-block).
On top of a739b2354 ("io_uring: enable CQE32").

fio testing branch:
https://github.com/joshkan/fio/tree/big-cqe-pt.v4

Changes since v3:
https://lore.kernel.org/linux-nvme/20220503184831.78705-1-p.raghav@samsung.com/
- Cleaned up placements of new fields in sqe and io_uring_cmd
- Removed packed-attribute from nvme_uring_cmd struct
- Applied all other Christoph's feedback too
- Applied Jens feedback
- Collected reviewed-by

Changes since v2:
https://lore.kernel.org/linux-nvme/20220401110310.611869-1-joshi.k@samsung.com/
- Rewire uring-cmd infrastructure on top of new big CQE
- Prep patch (refactored) and feedback from Christoph
- Add new opcode and structure in nvme for uring-cmd
- Enable vectored-io

Changes since v1:
https://lore.kernel.org/linux-nvme/20220308152105.309618-1-joshi.k@samsung.com/
- Trim down by removing patches for polling, fixed-buffer and bio-cache
- Add big CQE and move uring-cmd to use that
- Remove indirect (pointer) submission

Anuj Gupta (1):
  nvme: add vectored-io support for uring-cmd

Christoph Hellwig (1):
  nvme: refactor nvme_submit_user_cmd()

Jens Axboe (2):
  fs,io_uring: add infrastructure for uring-cmd
  block: wire-up support for passthrough plugging

Kanchan Joshi (1):
  nvme: wire-up uring-cmd support for io-passthru on char-device.

 block/blk-mq.c                  |  73 ++++++-----
 drivers/nvme/host/core.c        |   1 +
 drivers/nvme/host/ioctl.c       | 215 +++++++++++++++++++++++++++++++-
 drivers/nvme/host/multipath.c   |   1 +
 drivers/nvme/host/nvme.h        |   5 +
 fs/io_uring.c                   |  82 ++++++++++--
 include/linux/fs.h              |   2 +
 include/linux/io_uring.h        |  27 ++++
 include/uapi/linux/io_uring.h   |  21 ++--
 include/uapi/linux/nvme_ioctl.h |  26 ++++
 10 files changed, 398 insertions(+), 55 deletions(-)

-- 
2.25.1