K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2020-05-02T16:54:59.032292Z
K 7
svn:log
V 385
Cleanup LUN addition/removal.

 - Make ctl_add_lun() synchronous.  Asynchronous addition was used by
Copan's proprietary code long ago and never for upstream FreeBSD.
 - Move LUN enable/disable calls from backends to CTL core.
 - Serialize LUN modification and partially removal to avoid double frees.
 - Slightly unify backends code.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.

END