[SCSI] add supported_mode and active_mode attributes to the host

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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>

...

This commit is contained in:

FUJITA Tomonori 2007-09-01 02:02:20 +09:00 • committed by James Bottomley

parent 8184fe9b6e

commit 5dc2b89e12

3 changed files with 52 additions and 0 deletions

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1

drivers/scsi/hosts.c

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42

drivers/scsi/scsi_sysfs.c

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9

include/scsi/scsi_host.h

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