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sys,dll: reparse point implementation: DeleteReparsePoint

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This commit is contained in:
Bill Zissimopoulos
2016-08-26 07:43:25 -07:00
parent b88b2ec51d
commit 80e07cead6
6 changed files with 297 additions and 73 deletions
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112
src/dll/fsop.c
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@ -954,12 +954,15 @@ FSP_API NTSTATUS FspFileSystemOpFileSystemControl(FSP_FILE_SYSTEM *FileSystem,
if (FileSystem->ReparsePointsSymlinkOnly)
{
Result = FileSystem->Interface->SetReparsePoint(FileSystem, Request,
(PVOID)Request->Req.FileSystemControl.UserContext,
(PWSTR)Request->Buffer,
SetReparseData->SymbolicLinkReparseBuffer.PathBuffer +
SetReparseData->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(WCHAR),
SetReparseData->SymbolicLinkReparseBuffer.SubstituteNameLength);
if (IO_REPARSE_TAG_SYMLINK == *(PULONG)SetReparseData)
Result = FileSystem->Interface->SetReparsePoint(FileSystem, Request,
(PVOID)Request->Req.FileSystemControl.UserContext,
(PWSTR)Request->Buffer,
SetReparseData->SymbolicLinkReparseBuffer.PathBuffer +
SetReparseData->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(WCHAR),
SetReparseData->SymbolicLinkReparseBuffer.SubstituteNameLength);
else
Result = STATUS_IO_REPARSE_TAG_MISMATCH;
}
else
Result = FileSystem->Interface->SetReparsePoint(FileSystem, Request,
@ -970,58 +973,27 @@ FSP_API NTSTATUS FspFileSystemOpFileSystemControl(FSP_FILE_SYSTEM *FileSystem,
}
break;
case FSCTL_DELETE_REPARSE_POINT:
if (0 != FileSystem->Interface->GetReparsePoint &&
0 != FileSystem->Interface->SetReparsePoint)
if (0 != FileSystem->Interface->DeleteReparsePoint)
{
GetReparseData = (PREPARSE_DATA_BUFFER)Response->Buffer;
memset(GetReparseData, 0, sizeof *GetReparseData);
SetReparseData = (PREPARSE_DATA_BUFFER)
(Request->Buffer + Request->Req.FileSystemControl.Buffer.Offset);
if (FileSystem->ReparsePointsSymlinkOnly)
{
GetReparseData->ReparseTag = IO_REPARSE_TAG_SYMLINK;
Result = STATUS_SUCCESS;
if (IO_REPARSE_TAG_SYMLINK == *(PULONG)SetReparseData)
Result = FileSystem->Interface->DeleteReparsePoint(FileSystem, Request,
(PVOID)Request->Req.FileSystemControl.UserContext,
(PWSTR)Request->Buffer,
0, 0);
else
Result = STATUS_IO_REPARSE_TAG_MISMATCH;
}
else
{
Size = FSP_FSCTL_TRANSACT_RSP_SIZEMAX - FIELD_OFFSET(FSP_FSCTL_TRANSACT_RSP, Buffer);
Result = FileSystem->Interface->GetReparsePoint(FileSystem, Request,
Result = FileSystem->Interface->DeleteReparsePoint(FileSystem, Request,
(PVOID)Request->Req.FileSystemControl.UserContext,
(PWSTR)Request->Buffer, GetReparseData, &Size);
}
if (NT_SUCCESS(Result))
{
SetReparseData = (PREPARSE_DATA_BUFFER)
(Request->Buffer + Request->Req.FileSystemControl.Buffer.Offset);
if (GetReparseData->ReparseTag != SetReparseData->ReparseTag)
Result = STATUS_IO_REPARSE_TAG_MISMATCH;
else if (!IsReparseTagMicrosoft(SetReparseData->ReparseTag) && (
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data1 !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data1 ||
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data2 !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data2 ||
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data3 !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data3 ||
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data4[0] !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data4[0] ||
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data4[1] !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data4[1] ||
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data4[2] !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data4[2] ||
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data4[3] !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data4[3] ||
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data4[4] !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data4[4] ||
((PREPARSE_GUID_DATA_BUFFER)GetReparseData)->ReparseGuid.Data4[5] !=
((PREPARSE_GUID_DATA_BUFFER)SetReparseData)->ReparseGuid.Data4[5]))
Result = STATUS_REPARSE_ATTRIBUTE_CONFLICT;
if (NT_SUCCESS(Result))
Result = FileSystem->Interface->SetReparsePoint(FileSystem, Request,
(PVOID)Request->Req.FileSystemControl.UserContext,
(PWSTR)Request->Buffer, 0, 0);
}
(PWSTR)Request->Buffer,
SetReparseData,
Request->Req.FileSystemControl.Buffer.Size);
}
break;
}
@ -1231,8 +1203,7 @@ FSP_API NTSTATUS FspFileSystemResolveReparsePoints(FSP_FILE_SYSTEM *FileSystem,
continue;
else if (!NT_SUCCESS(Result))
{
if ((STATUS_OBJECT_NAME_NOT_FOUND == Result && '\0' != c) ||
STATUS_NOT_A_DIRECTORY == Result)
if (STATUS_OBJECT_NAME_NOT_FOUND != Result || '\0' != c)
Result = STATUS_OBJECT_PATH_NOT_FOUND;
return Result;
}
@ -1301,3 +1272,38 @@ no_symlink_exit:
PIoStatus->Information = ReparseData->ReparseTag;
return STATUS_REPARSE;
}
FSP_API NTSTATUS FspFileSystemCanReplaceReparsePoint(
PVOID CurrentReparseData, SIZE_T CurrentReparseDataSize,
PVOID ReplaceReparseData, SIZE_T ReplaceReparseDataSize)
{
if (sizeof(ULONG) > CurrentReparseDataSize ||
sizeof(ULONG) > ReplaceReparseDataSize)
return STATUS_IO_REPARSE_DATA_INVALID; /* should not happen! */
else if (*(PULONG)CurrentReparseData != *(PULONG)ReplaceReparseData)
return STATUS_IO_REPARSE_TAG_MISMATCH;
else if (!IsReparseTagMicrosoft(*(PULONG)CurrentReparseData) && (
REPARSE_GUID_DATA_BUFFER_HEADER_SIZE > CurrentReparseDataSize ||
REPARSE_GUID_DATA_BUFFER_HEADER_SIZE > ReplaceReparseDataSize ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data1 !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data1 ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data2 !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data2 ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data3 !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data3 ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data4[0] !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data4[0] ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data4[1] !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data4[1] ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data4[2] !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data4[2] ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data4[3] !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data4[3] ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data4[4] !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data4[4] ||
((PREPARSE_GUID_DATA_BUFFER)CurrentReparseData)->ReparseGuid.Data4[5] !=
((PREPARSE_GUID_DATA_BUFFER)ReplaceReparseData)->ReparseGuid.Data4[5]))
return STATUS_REPARSE_ATTRIBUTE_CONFLICT;
else
return STATUS_SUCCESS;
}