dll,tst: do not add dot entries for root directory

inc/winfsp/winfsp.h

@@ -600,7 +600,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
      *     Offset within the directory to read from. The kernel does not interpret this value
      *     which is used solely by the file system to locate directory entries. However the
      *     special value 0 indicates that the read should start from the first entries. The first
-     *     two entries returned by ReadDirectory should always be the "." and ".." entries.
+     *     two entries returned by ReadDirectory should always be the "." and ".." entries,
+     *     except for the root directory which does not have these entries.
      * @param Length
      *     Length of data to read.
      * @param Pattern

src/dll/fuse/fuse_intf.c

@@ -1735,6 +1735,15 @@ static NTSTATUS fsp_fuse_intf_ReadDirectory(FSP_FILE_SYSTEM *FileSystem,
         if (sizeof(struct fsp_fuse_dirinfo) > di->Size)
             break;
 
+        if ('/' == filedesc->PosixPath[0] && '\0' == filedesc->PosixPath[1])
+        {
+            /* if this is the root directory do not add the dot entries */
+
+            if ('.' == di->PosixNameBuf[0] && ('\0' == di->PosixNameBuf[1] ||
+                ('.' == di->PosixNameBuf[1] && '\0' == di->PosixNameBuf[2])))
+                continue;
+        }
+
         if (!di->FileInfoValid)
         {
             if (0 == PosixPath)

tst/memfs/memfs.cpp

@@ -1150,6 +1150,10 @@ static NTSTATUS ReadDirectory(FSP_FILE_SYSTEM *FileSystem,
     Context.PBytesTransferred = PBytesTransferred;
     Context.OffsetFound = FALSE;
 
+    if (L'\0' != FileNode->FileName[1])
+    {
+        /* if this is not the root directory add the dot entries */
+
         if (0 == Offset)
             if (!AddDirInfo(FileNode, L".", Buffer, Length, PBytesTransferred))
                 return STATUS_SUCCESS;
@@ -1160,6 +1164,7 @@ static NTSTATUS ReadDirectory(FSP_FILE_SYSTEM *FileSystem,
             if (!AddDirInfo(ParentNode, L"..", Buffer, Length, PBytesTransferred))
                 return STATUS_SUCCESS;
         }
+    }
 
     if (MemfsFileNodeMapEnumerateChildren(Memfs->FileNodeMap, FileNode, ReadDirectoryEnumFn, &Context))
         FspFileSystemAddDirInfo(0, Buffer, Length, PBytesTransferred);

tst/winfsp-tests/dirctl-test.c

@@ -48,6 +48,33 @@ static void querydir_dotest(ULONG Flags, PWSTR Prefix, ULONG FileInfoTimeout, UL
     DWORD times[2];
     times[0] = GetTickCount();
 
+    if (-1 != Flags)
+    {
+        StringCbPrintfW(FilePath, sizeof FilePath, L"%s%s\\*",
+            Prefix ? L"" : L"\\\\?\\GLOBALROOT", Prefix ? Prefix : memfs_volumename(memfs));
+        Handle = FindFirstFileW(FilePath, &FindData);
+        ASSERT(INVALID_HANDLE_VALUE != Handle);
+
+        FileCount = 0;
+        do
+        {
+            ASSERT(
+                0 == mywcscmp(FindData.cFileName, 4, L"file", 4) ||
+                0 == mywcscmp(FindData.cFileName, 3, L"dir", 3));
+
+            FileCount++;
+
+            if (0 < SleepTimeout && 5 == FileCount)
+                Sleep(SleepTimeout);
+        } while (FindNextFileW(Handle, &FindData));
+        ASSERT(ERROR_NO_MORE_FILES == GetLastError());
+
+        ASSERT(110 == FileCount);
+
+        Success = FindClose(Handle);
+        ASSERT(Success);
+    }
+
     StringCbPrintfW(FilePath, sizeof FilePath, L"%s%s\\dir5\\*",
         Prefix ? L"" : L"\\\\?\\GLOBALROOT", Prefix ? Prefix : memfs_volumename(memfs));
     Handle = FindFirstFileW(FilePath, &FindData);