#include "io_u.h"
+#define FDP_DIR_DTYPE 2
+#define FDP_MAX_RUHS 128
+
+/*
+ * How fio chooses what placement identifier to use next. Choice of
+ * uniformly random, or roundrobin.
+ */
+
+enum {
+ FIO_FDP_RANDOM = 0x1,
+ FIO_FDP_RR = 0x2,
+};
+
struct fio_ruhs_info {
uint32_t nr_ruhs;
uint32_t pli_loc;