[PATCH v3 0/6] scsi: scsi_debug: fix zoned write validation

[Niklas Cassel <cassel@kernel.org>]

This series fixes scsi_debug with regards to writes to a ZBC drive.

The series is based on 7.4/scsi-staging rather than 7.3/scsi-fixes (as
Damien suggested on v1) to avoid a build warning that would have happened
if this series was simply merged with linux-next (7.4/scsi-staging):

  error: too many arguments to function 'mk_sense_buffer'

Tested on a zoned scsi_debug device with 512 byte logical blocks and a
4096 byte physical block.

Changes since v2:
- Added patch 1, to that write paths correctly report the residual.
- Added patch 2, so that do_device_access() will always write a
  multiple of physical block size. (Reads are unchanged.)
- Patch 3 changed to advance the WP by how much that was actually written
  (rather than leaving the WP alone when not all blocks were written).
- Patch 5 changed to take the meta write lock if scsi_debug_lbp() is set.

Niklas Cassel (6):
  scsi: scsi_debug: Report the residual of a write
  scsi: scsi_debug: Do not write a partial physical block
  scsi: scsi_debug: Advance the write pointer over the data written
  scsi: scsi_debug: Enforce physical block alignment of zoned writes
  scsi: scsi_debug: Map the region written by WRITE ATOMIC (16)
  scsi: scsi_debug: Validate zone access for WRITE ATOMIC (16)

 drivers/scsi/scsi_debug.c | 66 +++++++++++++++++++++++++++++++++++----
 1 file changed, 60 insertions(+), 6 deletions(-)


base-commit: c3cff7fac01638ab58e85fe7df41a04fa25c5bae
-- 
2.55.0