A number of existing tests create a secondary iSCSI session by logging
into the target specified in the base sd during the test.
With multipath sessions now connected during iscsi-test-cu startup
(when launched with multiple URIs), secondary sessions can be
provided via multipath when available, rather than reconnecting.
This change adds a helper that conditionally returns the secondary
multipath device if available, or falls back to creating a new session
via the base sd target details.
Signed-off-by: David Disseldorp <ddiss@suse.de>
MPATH_SKIP_UNLESS_ISCSI(_sds, _num_sds) iterates over all _sds, and
skips the test unless all paths are iSCSI based.
Signed-off-by: David Disseldorp <ddiss@suse.de>
mpath_check_matching_ids() walks the list of scsi devices, and confirms
that all entries share one common device identification designator or
unit serial number.
Signed-off-by: David Disseldorp <ddiss@suse.de>
