+ struct thread_data *td = vc->td;
+ struct io_u *io_u = vc->io_u;
+ char *buf, *pattern;
+ unsigned int hdr_size = __hdr_size(td->o.verify);
+ unsigned int len, mod, i;
+
+ pattern = td->o.verify_pattern;
+ buf = (void *) hdr + hdr_size;
+ len = get_hdr_inc(td, io_u) - hdr_size;
+ mod = hdr_size % td->o.verify_pattern_bytes;