OS-1566 filesystem limits for ZFS datasets

@@ -1263,10 +1263,20 @@
                     (prop == ZFS_PROP_QUOTA || prop == ZFS_PROP_REFQUOTA)) {
                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
                             "use 'none' to disable quota/refquota"));
                         goto error;
                 }
+
+                /*
+                 * Special handling for "*_limit=none". In this case it's not
+                 * 0 but UINT64_MAX.
+                 */
+                if ((type & ZFS_TYPE_DATASET) && isnone &&
+                    (prop == ZFS_PROP_FILESYSTEM_LIMIT ||
+                    prop == ZFS_PROP_SNAPSHOT_LIMIT)) {
+                        *ivalp = UINT64_MAX;
+                }
                 break;
 
         case PROP_TYPE_INDEX:
                 if (datatype != DATA_TYPE_STRING) {
                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,