We made assumptions in the fibre channel connector code that
there was only ever a single lun per volume, even with many
wwns per connections. There is need to support multiple luns
per multipath device, similar to how the iSCSI volumes work.
What we do is allow a list for 'target_luns' and 'target_wwns'
in the connection properties, similar to how the iSCSI connector
treats things like 'target_portals', 'target_luns', etc. we
then group together 'targets' as combination of wwpns and the
lun associated with them. This grouping is used to through
the attach and detach workflow now to determine dev paths and
scsi target information for rescans.
All existing calls with 'target_lun' and 'target_wwn' will
continue working as before, the new plural keys are optional.
Change-Id: I393a028457a162228666d8497b695984fefdfab4
Closes-Bug: #1774293
(cherry picked from commit ba2569855d)
cae3ce60f4