local_vio_win: Fix handling files that have been deduplicated

as part of Windows SIS or Data Deduplication. Fixes #4056

diff --git a/csync/src/vio/csync_vio_local_win.c b/csync/src/vio/csync_vio_local_win.c
index 7bf403315a399709c188b5c0a0ecf69a324aa21d..f43393ea4c2f1b01f1d45b1b17e9dc39fad1a9bf 100644 (file)
--- a/csync/src/vio/csync_vio_local_win.c
+++ b/csync/src/vio/csync_vio_local_win.c
@@ -168,9 +168,14 @@ csync_vio_file_stat_t *csync_vio_local_readdir(csync_vio_handle_t *dhandle) {
   }
   file_stat->name = c_utf8_from_locale(handle->ffd.cFileName);
 
-  file_stat->fields |= CSYNC_VIO_FILE_STAT_FIELDS_TYPE;
-  if (handle->ffd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT
-            && handle->ffd.dwReserved0 & IO_REPARSE_TAG_SYMLINK) {
+    file_stat->fields |= CSYNC_VIO_FILE_STAT_FIELDS_TYPE;
+    if ( (handle->ffd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
+         && (handle->ffd.dwReserved0 & IO_REPARSE_TAG_SYMLINK)
+         // The SIS or DEDUP flag points to a MS deduplication feature of
+         // certain file storage products. It is not a normal symlink
+         // that should be ignored.
+         && (! (handle->ffd.dwReserved0 & IO_REPARSE_TAG_SIS))
+         && (! (handle->ffd.dwReserved0 & IO_REPARSE_TAG_DEDUP)) ) {
         file_stat->flags = CSYNC_VIO_FILE_FLAGS_SYMLINK;
         file_stat->type = CSYNC_VIO_FILE_TYPE_SYMBOLIC_LINK;
     } else if (handle->ffd.dwFileAttributes & FILE_ATTRIBUTE_DEVICE