K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2021-03-15T03:04:14.909280Z
K 7
svn:log
V 798
Refactor CTL datamove KPI.

 - Make frontends call unified CTL core method ctl_datamove_done()
to report move completion.  It allows to reduce code duplication
in differerent backends by accounting DMA time in common code.
 - Add to ctl_datamove_done() and be_move_done() callback samethr
argument, reporting whether the callback is called in the same
context as ctl_datamove().  It allows for some cases like iSCSI
write with immediate data or camsim frontend write save one context
switch, since we know that the context is sleepable.
 - Remove data_move_done() methods from struct ctl_backend_driver,
unused since forever.

MFC after:	 1 month

(cherry picked from commit 2c7dc6bae9fd5c2fa0a65768df8e4e99c2f159f1)

Git Hash:   c4a81e647599fa8acc5ba1b4dbe34f357d8219bc
Git Author: mav@FreeBSD.org
END