[0/2] target: Introduce dummy devices

Message

Konstantin Shelekhin March 18, 2021, 9:42 a.m. UTC

This patch series (inspired by SCST) adds support for the dummy devices
via the new DUMMY flag of rd_mcp. The rationale behind the change is to
give a user the ability to create conifgurable devices for LUN 0 with
custom WWN values (like vendor, product or revision) as some tools like
QConvergeGUI use LUN 0 to identify the whole storage.

The advantage over simply creating a NULLIO rd_mcp device is that the
DUMMY device will not be seen as a block device, hence less confusion
for the system administrator.

Konstantin Shelekhin (2):
  target: Add the DUMMY flag to rd_mcp
  target: Make the virtual LUN 0 device dummy

 drivers/target/target_core_device.c |  2 +-
 drivers/target/target_core_rd.c     | 27 +++++++++++++++++++++++----
 drivers/target/target_core_rd.h     |  1 +
 drivers/target/target_core_spc.c    |  6 +-----
 4 files changed, 26 insertions(+), 10 deletions(-)