Merge patch series "add virtual remote fabric"

Merge patch series "add virtual remote fabric"

Dmitry Bogdanov <d.bogdanov@yadro.com> says:

The patchset is based on 6.4/scsi-staging branch.

The first 11 patches are just a refactoring to reduce code duplication
in fabric drivers.  They make several callouts be optional in fabric
ops.  Make a default implementation of the optional ops and remove
such implementations in the fabric drivers.

The last patch is a new virtual remote fabric driver.  It has a
valueble sence with patchset "scsi: target: make RTPI an TPG
identifier" to configure RPTI on remote/tpgt_x same as on tpgt_y on
other nodes in a storage cluster. That allows to report the same ports
in RTPG from each node and to have a clusterwide tpg/acl/lun view in
kernel.

Link: https://lore.kernel.org/r/20230313181110.20566-1-d.bogdanov@yadro.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>