[SCSI] add supported_mode and active_mode attributes to the host
commit5dc2b89e124251662f580f4ba3c9f6195d1eaff6
authorFUJITA Tomonori <tomof@acm.org>
Fri, 31 Aug 2007 17:02:20 +0000 (1 02:02 +0900)
committerJames Bottomley <jejb@mulgrave.localdomain>
Fri, 12 Oct 2007 18:46:55 +0000 (12 14:46 -0400)
treea20051d208547da30b9e66ed3746d8a7237c289a
parent8184fe9b6e8928c8d5be3e2a1326b8b9183e409d
[SCSI] add supported_mode and active_mode attributes to the host

This adds supported_mode and active_mode attributes to
/sys/class/sys_host/hostX/ for specifying the mode that a lld supports
and the currently activated mode. The output format is similar to fc
rport roles:

luce:/sys/class/scsi_host/host0$ cat supported_mode
Initiator
luce:/sys/class/scsi_host/host0$ cat active_mode
Initiator

The mode values uses bitmap since we would support dual-mode llds in
the future like this:

luce:/sys/class/scsi_host/host0$ cat supported_mode
Initiator, Target

The supported_mode attribute looks at a scsi_host_template and the
active_mode attribute looks at a scsi_host. We would add a hook to a
scsi_host_template to change the active_mode attribute
dynamically. But now there is no hook since no lld supports that
feature.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
drivers/scsi/hosts.c
drivers/scsi/scsi_sysfs.c
include/scsi/scsi_host.h