tst: ntptfs: WslFeatures

tst/ntptfs/ptfs-main.c

@@ -124,6 +124,8 @@ static NTSTATUS SvcStart(FSP_SERVICE *Service, ULONG argc, PWSTR *argv)
                 FsAttributeMask |= PtfsExtendedAttributes;
             else if (0 == _wcsicmp(L"FlushAndPurgeOnCleanup", OptionString))
                 FsAttributeMask |= PtfsFlushAndPurgeOnCleanup;
+            else if (0 == _wcsicmp(L"WslFeatures", OptionString))
+                FsAttributeMask |= PtfsWslFeatures;
             else
                 goto usage;
             break;
@@ -243,6 +245,7 @@ usage:
         "    -o ReparsePoints\n"
         "    -o NamedStreams\n"
         "    -o ExtendedAttributes\n"
+        "    -o WslFeatures\n"
         "    -o FlushAndPurgeOnCleanup\n"
         "    -u \\Server\\Share    [UNC prefix (single backslash)]\n"
         "    -p Directory        [directory to expose as pass through file system]\n"

tst/ntptfs/ptfs.c

@@ -153,13 +153,6 @@ static NTSTATUS CreateEx(FSP_FILE_SYSTEM *FileSystem,
     UINT32 MaximumAccess = IsDirectory ? GrantedAccess : MAXIMUM_ALLOWED;
     NTSTATUS Result;
 
-    if (ExtraBufferIsReparsePoint)
-    {
-        /* no support for WSL */
-        Result = STATUS_INVALID_PARAMETER;
-        goto exit;
-    }
-
     CreateOptions &=
         FILE_DIRECTORY_FILE |
         FILE_NON_DIRECTORY_FILE |
@@ -198,6 +191,21 @@ static NTSTATUS CreateEx(FSP_FILE_SYSTEM *FileSystem,
     if (!NT_SUCCESS(Result))
         goto exit;
 
+    if (ExtraBufferIsReparsePoint)
+    {
+        /* this can happen on a WSL mount */
+        Result = LfsFsControlFile(
+            Handle,
+            FSCTL_SET_REPARSE_POINT,
+            ExtraBuffer,
+            (ULONG)ExtraLength,
+            0,
+            0,
+            &ExtraLength);
+        if (!NT_SUCCESS(Result))
+            goto exit;
+    }
+
     Result = LfsGetFileInfo(Handle, Ptfs->RootPrefixLength, FileInfo);
     if (!NT_SUCCESS(Result))
         goto exit;
@@ -1154,6 +1162,8 @@ NTSTATUS PtfsCreate(
     VolumeParams.PassQueryDirectoryPattern = 1;
     VolumeParams.FlushAndPurgeOnCleanup = (FsAttributeMask & PtfsFlushAndPurgeOnCleanup) ?
         1 : 0;
+    VolumeParams.WslFeatures = (FsAttributeMask & PtfsWslFeatures) ?
+        1 : 0;
     VolumeParams.AllowOpenInKernelMode = 1;
     VolumeParams.RejectIrpPriorToTransact0 = 1;
     VolumeParams.UmFileContextIsUserContext2 = 1;

tst/ntptfs/ptfs.h

@@ -42,11 +42,13 @@ enum
     PtfsNamedStreams = 0x00000040,
     PtfsExtendedAttributes = 0x00000100,
     PtfsFlushAndPurgeOnCleanup = 0x00004000,
+    PtfsWslFeatures = 0x04000000,
     PtfsAttributesMask =
         PtfsReparsePoints |
         PtfsNamedStreams |
         PtfsExtendedAttributes |
-        PtfsFlushAndPurgeOnCleanup,
+        PtfsFlushAndPurgeOnCleanup |
+        PtfsWslFeatures,
 };
 typedef struct
 {