ext2_truncate
int ext2_truncate(struct vnode *, off_t, int, struct ucred *, struct thread *);
error = ext2_truncate(vp, (off_t)0, 0, NOCRED, td);
error = ext2_truncate(dvp, (off_t)dp->i_endoff, IO_SYNC,
error = ext2_truncate(tvp, (off_t)0, IO_SYNC,
error = ext2_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred,
(void)ext2_truncate(vp, osize,
if ((error = ext2_truncate(vp, vap->va_size, 0, cred, td)) != 0)