SBC: Add support for WRITESAME10 and a simple test for using writesame10 to unmap blocks from thin provisioned luns

lib/sync.c

@@ -361,6 +361,32 @@ iscsi_verify10_sync(struct iscsi_context *iscsi, int lun, unsigned char *data, u
 	return state.task;
 }
 
+struct scsi_task *
+iscsi_writesame10_sync(struct iscsi_context *iscsi, int lun,
+		       unsigned char *data, uint32_t datalen,
+		       uint32_t lba, uint16_t num_blocks,
+		       int anchor, int unmap, int pbdata, int lbdata,
+		       int wrprotect, int group)
+{
+	struct iscsi_sync_state state;
+
+	memset(&state, 0, sizeof(state));
+
+	if (iscsi_writesame10_task(iscsi, lun, data, datalen,
+	   			 lba, num_blocks,
+	   			 anchor, unmap, pbdata, lbdata,
+				 wrprotect, group,
+				 scsi_sync_cb, &state) == NULL) {
+		iscsi_set_error(iscsi,
+				"Failed to send WRITESAME10 command");
+		return NULL;
+	}
+
+	event_loop(iscsi, &state);
+
+	return state.task;
+}
+
 struct scsi_task *
 iscsi_unmap_sync(struct iscsi_context *iscsi, int lun, int anchor, int group,
 		 struct unmap_list *list, int list_len)