Switch all random generators to be decided by use_os_rand

[fio.git] / filesetup.c

diff --git a/filesetup.c b/filesetup.c
index 0454cc4007936611ac53bad147b7f06b2afd2faa..2b690c8930d91cc39eeac8e4fb8a845409c96a86 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -210,9 +210,16 @@ static unsigned long long get_rand_file_size(struct thread_data *td)
        unsigned long long ret, sized;
        long r;
 
-       r = os_random_long(&td->file_size_state);
-       sized = td->o.file_size_high - td->o.file_size_low;
-       ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
+       if (td->o.use_os_rand) {
+               r = os_random_long(&td->file_size_state);
+               sized = td->o.file_size_high - td->o.file_size_low;
+               ret = (unsigned long long) ((double) sized * (r / (OS_RAND_MAX + 1.0)));
+       } else {
+               r = __rand(&td->__file_size_state);
+               sized = td->o.file_size_high - td->o.file_size_low;
+               ret = (unsigned long long) ((double) sized * (r / (FRAND_MAX + 1.0)));
+       }
+
        ret += td->o.file_size_low;
        ret -= (ret % td->o.rw_min_bs);
        return ret;