From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastian Herbszt <herbszt@gmx.de>
Subject: Re: multipathd: Add 'sysfs' prioritizer
Date: Tue, 31 May 2016 22:34:14 +0200
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To: Hannes Reinecke <hare@suse.de>
Cc: dm-devel@redhat.com, Sebastian Herbszt <herbszt@gmx.de>, Christophe Varoqui <christophe.varoqui@gmail.com>
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Hannes Reinecke wrote:
> Recent kernels have an 'access_state' attribute which allows
> us to read the asymmetric access state directly from sysfs.
> 
> Signed-off-by: Hannes Reinecke <hare@suse.de>
> ---
>  libmultipath/discovery.c           | 33 +++++++++++++++++++++++++++++
>  libmultipath/discovery.h           |  2 ++
>  libmultipath/prio.h                |  1 +
>  libmultipath/prioritizers/Makefile |  3 ++-
>  libmultipath/prioritizers/sysfs.c  | 43 ++++++++++++++++++++++++++++++++++++++
>  libmultipath/propsel.c             |  6 +++++-
>  multipath/multipath.conf.5         | 14 ++++++++++++-
>  7 files changed, 99 insertions(+), 3 deletions(-)
>  create mode 100644 libmultipath/prioritizers/sysfs.c

How about just adding this to the alua prioritizer?
This new feature could then depend on a "sysfs" argument.

Sebastian