From 7401481d428f1ce934cfa574b1737e223bcfe1ec Mon Sep 17 00:00:00 2001
From: Bill Zissimopoulos <billziss@navimatics.com>
Date: Tue, 13 Sep 2016 14:36:40 -0700
Subject: [PATCH] dll: fuse: allow opening of reparse points

---
 src/dll/fuse/fuse_intf.c | 30 ++++++++++++++++++++++++++++++
 src/dll/fuse/library.h   |  2 +-
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/src/dll/fuse/fuse_intf.c b/src/dll/fuse/fuse_intf.c
index 4ad29b75..6ae62434 100644
--- a/src/dll/fuse/fuse_intf.c
+++ b/src/dll/fuse/fuse_intf.c
@@ -847,6 +847,7 @@ static NTSTATUS fsp_fuse_intf_Create(FSP_FILE_SYSTEM *FileSystem,
 
     filedesc->PosixPath = contexthdr->PosixPath;
     filedesc->IsDirectory = !!(FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_DIRECTORY);
+    filedesc->IsReparsePoint = FALSE;
     filedesc->OpenFlags = fi.flags;
     filedesc->FileHandle = fi.fh;
     filedesc->DirBuffer = 0;
@@ -934,6 +935,11 @@ static NTSTATUS fsp_fuse_intf_Open(FSP_FILE_SYSTEM *FileSystem,
             Result = STATUS_SUCCESS;
         }
     }
+    else if (FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
+    {
+        fi.fh = -1;
+        Result = STATUS_SUCCESS;
+    }
     else
     {
         if (0 != f->ops.open)
@@ -961,6 +967,7 @@ static NTSTATUS fsp_fuse_intf_Open(FSP_FILE_SYSTEM *FileSystem,
 
     filedesc->PosixPath = contexthdr->PosixPath;
     filedesc->IsDirectory = !!(FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_DIRECTORY);
+    filedesc->IsReparsePoint = !!(FileInfoBuf.FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT);
     filedesc->OpenFlags = fi.flags;
     filedesc->FileHandle = fi.fh;
     filedesc->DirBuffer = 0;
@@ -990,6 +997,9 @@ static NTSTATUS fsp_fuse_intf_Overwrite(FSP_FILE_SYSTEM *FileSystem,
     int err;
     NTSTATUS Result;
 
+    if (filedesc->IsDirectory || filedesc->IsReparsePoint)
+        return STATUS_ACCESS_DENIED;
+
     if (0 != f->ops.ftruncate)
     {
         memset(&fi, 0, sizeof fi);
@@ -1069,6 +1079,10 @@ static VOID fsp_fuse_intf_Close(FSP_FILE_SYSTEM *FileSystem,
         if (0 != f->ops.releasedir)
             f->ops.releasedir(filedesc->PosixPath, &fi);
     }
+    else if (filedesc->IsReparsePoint)
+    {
+        /* reparse points are not opened, nothing to do! */
+    }
     else
     {
         if (0 != f->ops.flush)
@@ -1094,6 +1108,9 @@ static NTSTATUS fsp_fuse_intf_Read(FSP_FILE_SYSTEM *FileSystem,
     int bytes;
     NTSTATUS Result;
 
+    if (filedesc->IsDirectory || filedesc->IsReparsePoint)
+        return STATUS_ACCESS_DENIED;
+
     if (0 == f->ops.read)
         return STATUS_INVALID_DEVICE_REQUEST;
 
@@ -1131,6 +1148,9 @@ static NTSTATUS fsp_fuse_intf_Write(FSP_FILE_SYSTEM *FileSystem,
     int bytes;
     NTSTATUS Result;
 
+    if (filedesc->IsDirectory || filedesc->IsReparsePoint)
+        return STATUS_ACCESS_DENIED;
+
     if (0 == f->ops.write)
         return STATUS_INVALID_DEVICE_REQUEST;
 
@@ -1203,6 +1223,8 @@ static NTSTATUS fsp_fuse_intf_Flush(FSP_FILE_SYSTEM *FileSystem,
             Result = fsp_fuse_ntstatus_from_errno(f->env, err);
         }
     }
+    else if (filedesc->IsReparsePoint)
+        Result = STATUS_ACCESS_DENIED;
     else
     {
         if (0 != f->ops.fsync)
@@ -1329,6 +1351,9 @@ static NTSTATUS fsp_fuse_intf_SetFileSize(FSP_FILE_SYSTEM *FileSystem,
     int err;
     NTSTATUS Result;
 
+    if (filedesc->IsDirectory || filedesc->IsReparsePoint)
+        return STATUS_ACCESS_DENIED;
+
     if (0 == f->ops.ftruncate && 0 == f->ops.truncate)
         return STATUS_INVALID_DEVICE_REQUEST;
 
@@ -1644,6 +1669,9 @@ static NTSTATUS fsp_fuse_intf_ReadDirectory(FSP_FILE_SYSTEM *FileSystem,
     int err;
     NTSTATUS Result;
 
+    if (!filedesc->IsDirectory)
+        return STATUS_ACCESS_DENIED;
+
     memset(&dh, 0, sizeof dh);
 
     if (0 == filedesc->DirBuffer)
@@ -2029,6 +2057,8 @@ static NTSTATUS fsp_fuse_intf_SetReparsePoint(FSP_FILE_SYSTEM *FileSystem,
         goto exit;
     }
 
+    filedesc->IsReparsePoint = TRUE;
+
     Result = STATUS_SUCCESS;
 
 exit:
diff --git a/src/dll/fuse/library.h b/src/dll/fuse/library.h
index b44c6e60..a79fd932 100644
--- a/src/dll/fuse/library.h
+++ b/src/dll/fuse/library.h
@@ -60,7 +60,7 @@ struct fsp_fuse_context_header
 struct fsp_fuse_file_desc
 {
     char *PosixPath;
-    BOOLEAN IsDirectory;
+    BOOLEAN IsDirectory, IsReparsePoint;
     int OpenFlags;
     UINT64 FileHandle;
     PVOID DirBuffer;