From 9d73f15b0f3586a73698518112286031bf144b3d Mon Sep 17 00:00:00 2001
From: Bill Zissimopoulos <billziss@navimatics.com>
Date: Sun, 3 Jan 2016 17:15:59 -0800
Subject: [PATCH] dll: WIP

---
 src/dll/access.c |  4 ++++
 src/dll/create.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/src/dll/access.c b/src/dll/access.c
index 2f0dec57..85ad0cf7 100644
--- a/src/dll/access.c
+++ b/src/dll/access.c
@@ -88,7 +88,11 @@ FSP_API NTSTATUS FspAccessCheck(FSP_FILE_SYSTEM *FileSystem,
             FspPathCombine((PWSTR)Request->Buffer, Path);
 
             if (!NT_SUCCESS(Result))
+            {
+                if (STATUS_OBJECT_NAME_NOT_FOUND == Result)
+                    Result = STATUS_OBJECT_PATH_NOT_FOUND;
                 goto exit;
+            }
 
             if (AccessCheck(SecurityDescriptor, (HANDLE)Request->Req.Create.AccessToken, FILE_TRAVERSE,
                 &FspFileGenericMapping, 0, &PrivilegeSetLength, &TraverseAccess, &AccessStatus))
diff --git a/src/dll/create.c b/src/dll/create.c
index 791c09cf..5f9814d2 100644
--- a/src/dll/create.c
+++ b/src/dll/create.c
@@ -84,7 +84,58 @@ static NTSTATUS FspFileSystemOpCreate_FileOpen(FSP_FILE_SYSTEM *FileSystem,
 static NTSTATUS FspFileSystemOpCreate_FileOpenIf(FSP_FILE_SYSTEM *FileSystem,
     FSP_FSCTL_TRANSACT_REQ *Request)
 {
-    return STATUS_NOT_IMPLEMENTED;
+    if (0 == FileSystem->Interface->FileOpen || 0 == FileSystem->Interface->FileCreate)
+        return FspFileSystemSendResponseWithStatus(FileSystem, Request, STATUS_NOT_IMPLEMENTED);
+
+    NTSTATUS Result;
+    DWORD GrantedAccess;
+    FSP_FILE_NODE *FileNode;
+    FSP_FSCTL_TRANSACT_RSP Response;
+    BOOLEAN Create = FALSE;
+
+    Result = FspAccessCheck(FileSystem, Request, TRUE,
+        Request->Req.Create.DesiredAccess, &GrantedAccess);
+    if (!NT_SUCCESS(Result))
+    {
+        if (STATUS_OBJECT_NAME_NOT_FOUND != Result)
+            return FspFileSystemSendResponseWithStatus(FileSystem, Request, Result);
+
+        Create = TRUE;
+        Result = FspAccessCheck(FileSystem, Request, FALSE,
+            (Request->Req.Create.CreateOptions & FILE_DIRECTORY_FILE) ?
+                FILE_ADD_SUBDIRECTORY : FILE_ADD_FILE,
+            &GrantedAccess);
+        if (!NT_SUCCESS(Result))
+            return FspFileSystemSendResponseWithStatus(FileSystem, Request, Result);
+    }
+
+    if (Create)
+    {
+        Result = FileSystem->Interface->FileCreate(FileSystem, Request, &FileNode);
+        memset(&FileNode->ShareAccess, 0, sizeof FileNode->ShareAccess);
+    }
+    else
+        Result = FileSystem->Interface->FileOpen(FileSystem, Request, &FileNode);
+    if (!NT_SUCCESS(Result))
+        return FspFileSystemSendResponseWithStatus(FileSystem, Request, Result);
+
+    Result = FspShareCheck(FileSystem, GrantedAccess, Request->Req.Create.ShareAccess, FileNode);
+    if (!NT_SUCCESS(Result))
+    {
+        if (0 != FileSystem->Interface->FileClose)
+            FileSystem->Interface->FileClose(FileSystem, Request, FileNode);
+        return FspFileSystemSendResponseWithStatus(FileSystem, Request, Result);
+    }
+
+    memset(&Response, 0, sizeof Response);
+    Response.Size = sizeof Response;
+    Response.Kind = Request->Kind;
+    Response.Hint = Request->Hint;
+    Response.IoStatus.Status = STATUS_SUCCESS;
+    Response.IoStatus.Information = Create ? FILE_CREATED : FILE_OPENED;
+    Response.Rsp.Create.Opened.UserContext = (UINT_PTR)FileNode;
+    Response.Rsp.Create.Opened.GrantedAccess = GrantedAccess;
+    return FspFileSystemSendResponse(FileSystem, &Response);
 }
 
 static NTSTATUS FspFileSystemOpCreate_FileOverwrite(FSP_FILE_SYSTEM *FileSystem,