[PATCH] Fix stack overflow

[fio.git] / filesetup.c

diff --git a/filesetup.c b/filesetup.c
index 1f1259d1ac156bd99666b73e8a6a71ecdd4d28ee..84cd7f7dfe2bffa93ed62d3ea7aaa790cd6e02b3 100644 (file)
--- a/filesetup.c
+++ b/filesetup.c
@@ -154,6 +154,16 @@ static int file_size(struct thread_data *td, struct fio_file *f)
 {
        struct stat st;
 
+       /*
+        * if we are not doing real io, just pretend the file is as large
+        * as the size= given. this works fine with nrfiles > 1 as well,
+        * we only really care about it being at least as big as size=
+        */
+       if (td->io_ops->flags & FIO_NULLIO) {
+               f->real_file_size = f->file_size = td->total_file_size;
+               return 0;
+       }
+
        if (td->overwrite) {
                if (fstat(f->fd, &st) == -1) {
                        td_verror(td, errno);