Hi -

This patch adds some scsi_device sysfs specific macros (based on some
in the usb source), and adds more scsi_device sysfs attributes.

It modifies the current output of the "type" attribute to be
the numeric value of the type, and adds a few other attributes.

It is easy to add or remove scsi_device attributes with this patch.

Example sysfs with this patch:

[patman@elm3a50 patman]$ ls /sysfs/bus/scsi/devices/0:0:0:0
0:0:0:0:gen   current_queue_depth  name             power  vendor
access_count  device_blocked       new_queue_depth  rev
block         model                online           type

And results of catting each file above (block and 0:0:0:0:gen are
not files):

/sysfs/bus/scsi/devices/0:0:0:0/access_count: '2'
/sysfs/bus/scsi/devices/0:0:0:0/current_queue_depth: '253'
/sysfs/bus/scsi/devices/0:0:0:0/device_blocked: '0'
/sysfs/bus/scsi/devices/0:0:0:0/model: 'ST318203LC    !#'
/sysfs/bus/scsi/devices/0:0:0:0/name: 'SIBM-PSG ST318203LC    !#LRA6701300007027J5ZL'
/sysfs/bus/scsi/devices/0:0:0:0/new_queue_depth: '253'
/sysfs/bus/scsi/devices/0:0:0:0/online: '1'
/sysfs/bus/scsi/devices/0:0:0:0/power: '0'
/sysfs/bus/scsi/devices/0:0:0:0/rev: 'B222'
/sysfs/bus/scsi/devices/0:0:0:0/type: '0'
/sysfs/bus/scsi/devices/0:0:0:0/vendor: 'IBM-PSG '

The online bit field is writable, although setting it to 0 is not useful.