dircheck
if (idesc->id_loc % DIRBLKSIZ != 0 || dircheck(idesc, bp, dp) != 0) {
if (dircheck(idesc, bp, ndp) != 0)
static int dircheck(struct inodesc *, struct bufarea *, struct direct *);
SYSCTL_INT(_debug, OID_AUTO, dircheck, CTLFLAG_RW, &dirchk, 0, "");