Add test case for IORING_OP_POLL

Signed-off-by: Jens Axboe <axboe@kernel.dk>

src/io_uring.h

@@ -11,6 +11,8 @@
 #include <linux/fs.h>
 #include <linux/types.h>
 
+#define IORING_MAX_ENTRIES	4096
+
 /*
  * IO submission data structure (Submission Queue Entry)
  */
@@ -51,6 +53,8 @@ struct io_uring_sqe {
 #define IORING_OP_FSYNC		3
 #define IORING_OP_READ_FIXED	4
 #define IORING_OP_WRITE_FIXED	5
+#define IORING_OP_POLL		6
+#define IORING_OP_POLL_CANCEL	7
 
 /*
  * sqe->fsync_flags