Libiscsi: add support for RECEIVE COPY RESULTS

Build on existing scsi_cdb_receive_copy_results() functionality. This
request is most commonly used to determine target-side EXTENDED COPY
operational parameters.

Signed-off-by: David Disseldorp <ddiss@suse.de>

lib/iscsi-command.c

@@ -2611,6 +2611,29 @@ iscsi_report_supported_opcodes_task(struct iscsi_context *iscsi, int lun,
 	return task;
 }
 
+struct scsi_task *
+iscsi_receive_copy_results_task(struct iscsi_context *iscsi, int lun,
+				int sa, int list_id, int alloc_len,
+				iscsi_command_cb cb, void *private_data)
+{
+	struct scsi_task *task;
+
+	task = scsi_cdb_receive_copy_results(sa, list_id, alloc_len);
+	if (task == NULL) {
+		iscsi_set_error(iscsi, "Out-of-memory: Failed to create "
+				"RECEIVE COPY RESULTS cdb.");
+		return NULL;
+	}
+
+	if (iscsi_scsi_command_async(iscsi, lun, task, cb,
+				     NULL, private_data) != 0) {
+		scsi_free_scsi_task(task);
+		return NULL;
+	}
+
+	return task;
+}
+
 struct scsi_task *
 iscsi_scsi_get_task_from_pdu(struct iscsi_pdu *pdu)
 {