[0/8] ublk: cleanup & improvement & zc follow-up

Message

Ming Lei March 24, 2025, 1:48 p.m. UTC

Hi Jens,

The 1st three patches are small cleanup.

The 4th & 5th patches are zc follow-up.

The 6th patch implements ->queue_rqs() and improves IOPS by > 10%.

The last two patches are self-test for ->queue_rqs() & segment parameter
change.

Each one is straight-forward.

Ming Lei (8):
  ublk: remove two unused fields from 'struct ublk_queue'
  ublk: add helper of ublk_need_map_io()
  ublk: truncate io command result
  ublk: add segment parameter
  ublk: document zero copy feature
  ublk: implement ->queue_rqs()
  selftests: ublk: add more tests for covering MQ
  selftests: ublk: add test for checking zero copy related parameter

 Documentation/block/ublk.rst                  |  28 +++--
 drivers/block/ublk_drv.c                      | 119 +++++++++++++++---
 include/uapi/linux/ublk_cmd.h                 |   9 ++
 tools/testing/selftests/ublk/Makefile         |   4 +
 tools/testing/selftests/ublk/null.c           |  11 +-
 tools/testing/selftests/ublk/test_common.sh   |   6 +
 .../testing/selftests/ublk/test_generic_02.sh |  44 +++++++
 .../testing/selftests/ublk/test_generic_03.sh |  28 +++++
 tools/testing/selftests/ublk/test_loop_01.sh  |  14 +--
 tools/testing/selftests/ublk/test_loop_03.sh  |  14 +--
 tools/testing/selftests/ublk/test_loop_05.sh  |  28 +++++
 .../testing/selftests/ublk/test_stripe_01.sh  |  14 +--
 .../testing/selftests/ublk/test_stripe_03.sh  |  30 +++++
 13 files changed, 298 insertions(+), 51 deletions(-)
 create mode 100755 tools/testing/selftests/ublk/test_generic_02.sh
 create mode 100755 tools/testing/selftests/ublk/test_generic_03.sh
 create mode 100755 tools/testing/selftests/ublk/test_loop_05.sh
 create mode 100755 tools/testing/selftests/ublk/test_stripe_03.sh