[stgt] [PATCH] use LUN association and SNS ID type for the VPD (0x83) page

Or Gerlitz ogerlitz at Voltaire.com
Wed Feb 25 16:57:11 CET 2009

FUJITA Tomonori wrote:
> Your patch does the right thing for only iSCSI? We need to do the
> right things for other protocols.

My patch wasn't related to the protocol id field. Your patch removes the 
reporting of tgt on iscsi id type and I'm fine with this, but per my understanding
it has nothing to do with the problem I had and the fix I suggested.

> A simple patch like this doesn't work for you? I guess that we still
> need to add a new user interface to change 0x83 VPD page freely though.

Yes, it works fine, thanks! To make sure we're on the same page, your patch
does four changes to vpd page 0x83

1. doesn't report protocol id anymore (PIV set to zero)
2. reports LUN association (zero) instead of target port association
3. reports T10 identifier type instead of vendor specific
4. uses the T10 IET assigned name in the identifier

I am fine with the patch and it allows me to achieve the interop
with the vmware stack, to make it clearer I would add the LU association

--- tgt.orig/usr/spc.c
+++ tgt/usr/spc.c
@@ -133,8 +133,8 @@ static void update_vpd_83(struct scsi_lu
 	struct vpd *vpd_pg = lu->attrs.lu_vpd[3];
 	uint8_t	*data = vpd_pg->data;
-	data[0] = (PIV_ISCSI << 4) | INQ_CODE_ASCII;
+	data[0] = INQ_CODE_ASCII;
+	data[1] = ASS_LU | DESG_T10;
 	data[3] = SCSI_ID_LEN;
 	strncpy((char *)data + 4, id, SCSI_ID_LEN);
@@ -1029,7 +1029,7 @@ int spc_lu_init(struct scsi_lu *lu)
 	snprintf(lu->attrs.product_rev, sizeof(lu->attrs.product_rev),
 		 "%s", "0001");
 	snprintf(lu->attrs.scsi_id, sizeof(lu->attrs.scsi_id),
-		 "deadbeaf%d:%" PRIu64, tgt->tid, lu->lun);
+		 "IET     %04x%04" PRIx64, tgt->tid, lu->lun);
 	snprintf(lu->attrs.scsi_sn, sizeof(lu->attrs.scsi_sn),
 		 "beaf%d%" PRIu64, tgt->tid, lu->lun);
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