[PATCHv5 00/11] ublk zero copy support

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

Changes from v4:

  A few cleanup prep patches from me and Pavel are at the beginning of
  this series.

  Uses Pavel's combined buffer lookup and import. This simplifies
  utilizing fixed buffers a bit later in the series, and obviates any
  need to generically handle fixed buffers. This also fixes up the net
  zero-copy notif assignemnet that Ming pointed out.

  Included the nvme uring_cmd fix for using kernel registered bvecs from
  Xinyu.

  Used speculative safe array indexes when registering a new bvec
  (Pavel).

  Encode the allowed direction as bit flags (Caleb, Pavel).

  Incorporated various cleanups suggested by Caleb.

Keith Busch (7):
  io_uring/rsrc: remove redundant check for valid imu
  io_uring/nop: reuse req->buf_index
  io_uring/rw: move fixed buffer import to issue path
  io_uring: add support for kernel registered bvecs
  ublk: zc register/unregister bvec
  io_uring: add abstraction for buf_table rsrc data
  io_uring: cache nodes and mapped buffers

Pavel Begunkov (3):
  io_uring/net: reuse req->buf_index for sendzc
  io_uring/nvme: pass issue_flags to io_uring_cmd_import_fixed()
  io_uring: combine buffer lookup and import

Xinyu Zhang (1):
  nvme: map uring_cmd data even if address is 0

 drivers/block/ublk_drv.c       | 117 +++++++++----
 drivers/nvme/host/ioctl.c      |  12 +-
 include/linux/io_uring/cmd.h   |  13 +-
 include/linux/io_uring_types.h |  24 ++-
 include/uapi/linux/ublk_cmd.h  |   4 +
 io_uring/fdinfo.c              |   8 +-
 io_uring/filetable.c           |   2 +-
 io_uring/net.c                 |  25 +--
 io_uring/nop.c                 |   7 +-
 io_uring/opdef.c               |   8 +-
 io_uring/register.c            |   2 +-
 io_uring/rsrc.c                | 304 +++++++++++++++++++++++++++------
 io_uring/rsrc.h                |  16 +-
 io_uring/rw.c                  |  52 +++---
 io_uring/rw.h                  |   4 +-
 io_uring/uring_cmd.c           |  28 +--
 16 files changed, 433 insertions(+), 193 deletions(-)

-- 
2.43.5