+enum fio_ioengine_flags {
+ FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
+ FIO_RAWIO = 1 << 1, /* some sort of direct/raw io */
+ FIO_DISKLESSIO = 1 << 2, /* no disk involved */
+ FIO_NOEXTEND = 1 << 3, /* engine can't extend file */
+ FIO_NODISKUTIL = 1 << 4, /* diskutil can't handle filename */
+ FIO_UNIDIR = 1 << 5, /* engine is uni-directional */
+ FIO_NOIO = 1 << 6, /* thread does only pseudo IO */
+ FIO_PIPEIO = 1 << 7, /* input/output no seekable */
+ FIO_BARRIER = 1 << 8, /* engine supports barriers */
+ FIO_MEMALIGN = 1 << 9, /* engine wants aligned memory */
+ FIO_BIT_BASED = 1 << 10, /* engine uses a bit base (e.g. uses Kbit as opposed to KB) */
+ FIO_FAKEIO = 1 << 11, /* engine pretends to do IO */
+};
+
+/*
+ * External engine defined symbol to fill in the engine ops structure
+ */
+typedef void (*get_ioengine_t)(struct ioengine_ops **);