These are separate fields in the request.
---
src/protocol.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/protocol.h b/src/protocol.h
index 088dcab..0444641 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -154,6 +154,7 @@ struct reply {
#define NBD_CMD_FLUSH 3
#define NBD_CMD_TRIM 4
#define NBD_CMD_WRITE_ZEROES 6
+
#define NBD_CMD_FLAG_FUA (1<<0)
#define NBD_CMD_FLAG_NO_HOLE (1<<1)
--
2.19.0.rc0