snapacct_ufs2
if ((error = snapacct_ufs2(vp, oldblkp, lastblkp, fs, lblkno, exptype)))
static int snapacct_ufs2(struct vnode *, ufs2_daddr_t *, ufs2_daddr_t *,
error = expunge_ufs2(vp, xp, fs, snapacct_ufs2,