FSSNAP_KSTAT_HIGHWATER
kshigh = kstat_lookup(kslib, SNAP_NAME, 0, FSSNAP_KSTAT_HIGHWATER);
highp = kstat_data_lookup(kshigh, FSSNAP_KSTAT_HIGHWATER);
ksp = kstat_create(snapname, 0, FSSNAP_KSTAT_HIGHWATER, "misc",
kstat_named_init(ksdata, FSSNAP_KSTAT_HIGHWATER,