filesetup: fix a bug where we overwrite the set size

For the null io engine, we don't set file sizes. And we should
not overwrite a potentially legitimate o->size, if total_size
is zero.

Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/filesetup.c b/filesetup.c
index 29a76c0c3f5a52d60d18cb9775ec8b99bc603a1a..43146ba7671f61216fa938380c4bab908cd44b20 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -898,7 +898,7 @@ int setup_files(struct thread_data *td)
                }
        }
 
-       if (!o->size || o->size > total_size)
+       if (!o->size || (total_size && o->size > total_size))
                o->size = total_size;
 
        if (o->size < td_min_bs(td)) {