null: add FIO_FAKEIO flag
Tell the backend that null just fakes IO, and use this knowledge
to have verifies automagically work when using null. This allows
testing of a wider range of paths with ioengine=null.
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/verify.c b/verify.c
index 217b686..3d7c5de 100644
--- a/verify.c
+++ b/verify.c
@@ -759,6 +759,13 @@
if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ)
return 0;
+ /*
+ * If the IO engine is faking IO (like null), then just pretend
+ * we verified everything.
+ */
+ if (td->io_ops->flags & FIO_FAKEIO)
+ return 0;
+
if (io_u->flags & IO_U_F_TRIMMED) {
ret = verify_trimmed_io_u(td, io_u);
goto done;