4185 New hash algorithm support

@@ -1375,10 +1375,16 @@
                 if (prop == ZFS_PROP_COMPRESSION) {
                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
                             "property setting is not allowed on "
                             "bootable datasets"));
                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
+                } else if (prop == ZFS_PROP_CHECKSUM ||
+                    prop == ZFS_PROP_DEDUP) {
+                        (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
+                            "property setting is not allowed on "
+                            "root pools"));
+                        (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
                 } else {
                         (void) zfs_standard_error(hdl, err, errbuf);
                 }
                 break;