tree 766559a83169ef322c1dd3ea293ef42e8cc7833b
parent 9ad5204d68a3b48b92907d88d1c28d33fde6ba2a
author Salyzyn, Mark <mark_salyzyn@adaptec.com> 1184695288 -0400
committer James Bottomley <jejb@mulgrave.localdomain> 1184775468 -0500

[SCSI] aacraid: add vpd to inquiry

Report VPD inquiry page 0x80 with an unique array creation serial
number (CUID). When an array is created, the metadata stored on the
physical drives gets an unique serial number. This serial number
remains constant through array morphing or migration to other
controllers.  This patch is a forward port and modification to survive
morphing and migration operations, of a similar piece of
(un-attributed author) code added to the SLES10 SP1 aacraid driver.

To test the results of the patch, observe that /dev/disk/by-id/
entries will show up for the arrays resulting from the udev rules.
Also, as per the udev rules, 'scsi_id -g -x -a -s /block/sd? -d
/dev/sd?'  will report the ID_SERIAL as constructed from the inquiry
data.

It was reported to me that the 'ADPT' leading the serial number was bad
form, that the inquiry vendor field was enough to differentiate the
storage uniquely. Subsequent search found that another Adaptec AAC based
driver reported the 8 hex serial number only without such adornments, so
dropped ADPT to match. Resubmitting the patch with this alteration.

Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>