[PATCH v3 0/2] ublk: introduce UBLK_CMD_TRY_STOP_DEV

[Yoav Cohen <yoav@nvidia.com>]

Hello,

This patch series introduces a new command for ublk device management.

The first patch changes `ublk_ctrl_stop_dev()` to return void, since it
always returned 0. This simplifies the API.

The second patch introduces `UBLK_CMD_TRY_STOP_DEV`, which stops the
device only if there are no active openers. Unlike the existing stop
command (`UBLK_CMD_STOP_DEV`), this command avoids disrupting active
users by returning -EBUSY if the device is busy.

These patches only introduce the new command and API simplification
without altering existing behavior for active users

Changes since v1:
 - Address Ming Lei’s comments in patch 2:
   - Add a feature flag and some minor comments.
 - Patch 1 unchanged, keeps Reviewed-by

Yoav Cohen (2):
  ublk: make ublk_ctrl_stop_dev return void
  ublk: add UBLK_CMD_TRY_STOP_DEV command

 drivers/block/ublk_drv.c      | 48 ++++++++++++++++++++++++++++++++---
 include/uapi/linux/ublk_cmd.h |  9 ++++++-
 2 files changed, 52 insertions(+), 5 deletions(-)

-- 
2.39.5 (Apple Git-154)