target: Allow non zero ListID in EXTENDED_COPY parameter list

This patch changes target_do_xcopy() to allow processing of non-zero
ListIDs in EXTENDED_COPY parameter list data, instead of returning
CHECK_CONDITION status.

As the copy offload implementation reports SNLID=1 (Supports No ListID)
in OPERATING PARAMETERS, any ListID value presented by the client is
currently ignored.

Also, properly extract list_id_usage for informational purposes.

Reported-by: Thomas Glanzmann <thomas@glanzmann.de>
Reported-by: Douglas Gilbert <dgilbert@interlog.com>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_xcopy.c

@@ -911,11 +911,8 @@ sense_reason_t target_do_xcopy(struct se_cmd *se_cmd)
 	}
 
 	list_id = p[0];
-	if (list_id != 0x00) {
-		pr_err("XCOPY with non zero list_id: 0x%02x\n", list_id);
-		goto out;
-	}
-	list_id_usage = (p[1] & 0x18);
+	list_id_usage = (p[1] & 0x18) >> 3;
+
 	/*
 	 * Determine TARGET DESCRIPTOR LIST LENGTH + SEGMENT DESCRIPTOR LIST LENGTH
 	 */