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sys: create: FspFsvolCreate

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Fix file name case after crossing a reparse point as per
http://online.osr.com/ShowThread.cfm?link=287522
This commit is contained in:
Bill Zissimopoulos 2018-09-06 16:40:27 -07:00
parent 4551766f7a
commit dcf3d612bc
2 changed files with 73 additions and 0 deletions
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61
src/sys/create.c
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@ -69,6 +69,16 @@ FSP_DRIVER_DISPATCH FspCreate;
#pragma alloc_text(PAGE, FspCreate)
#endif
/*
* FSP_CREATE_REPARSE_POINT_ECP
*
* Define this macro to include code to fix file name case after crossing
* a reparse point as per http://online.osr.com/ShowThread.cfm?link=287522.
* Fixing this problem requires undocumented information; for this reason
* this fix is EXPERIMENTAL.
*/
#define FSP_CREATE_REPARSE_POINT_ECP
#define PREFIXW L"" FSP_FSCTL_VOLUME_PARAMS_PREFIX
#define PREFIXW_SIZE (sizeof PREFIXW - sizeof(WCHAR))
@ -140,6 +150,12 @@ static NTSTATUS FspFsvolCreate(
* of the main file for a stream. In this case this is a reentrant open
* and we should be careful not to try to acquire the rename resource,
* which is already acquired (otherwise DEADLOCK).
*
* - To determine whether this is an open after crossing a reparse point
* (e.g. when the file system is mounted as a directory). Unfortunately
* Windows does not preserve file name case in this case and sends us
* UPPERCASE file names, which results in all kinds of problems, esp.
* for case-sensitive file systems.
*/
ExtraCreateParameters = 0;
Result = FsRtlGetEcpListFromIrp(Irp, &ExtraCreateParameters);
@ -151,6 +167,51 @@ static NTSTATUS FspFsvolCreate(
&FspMainFileOpenEcpGuid, &ExtraCreateParameter, 0)) &&
0 != ExtraCreateParameter &&
!FsRtlIsEcpFromUserMode(ExtraCreateParameter);
#if defined(FSP_CREATE_REPARSE_POINT_ECP)
// {73d5118a-88ba-439f-92f4-46d38952d250}
static const GUID FspReparsePointEcpGuid =
{ 0x73d5118a, 0x88ba, 0x439f, { 0x92, 0xf4, 0x46, 0xd3, 0x89, 0x52, 0xd2, 0x50 } };
typedef struct _REPARSE_POINT_ECP
{
USHORT UnparsedNameLength;
USHORT Flags;
USHORT DeviceNameLength;
PVOID Reserved;
UNICODE_STRING Name;
} REPARSE_POINT_ECP;
REPARSE_POINT_ECP *ReparsePointEcp;
ExtraCreateParameter = 0;
ReparsePointEcp =
NT_SUCCESS(FsRtlFindExtraCreateParameter(ExtraCreateParameters,
&FspReparsePointEcpGuid, &ExtraCreateParameter, 0)) &&
0 != ExtraCreateParameter &&
!FsRtlIsEcpFromUserMode(ExtraCreateParameter) ?
ExtraCreateParameter : 0;
if (0 != ReparsePointEcp)
{
//DEBUGLOG("%hu %wZ", ReparsePointEcp->UnparsedNameLength, ReparsePointEcp->Name);
UNICODE_STRING FileName = IrpSp->FileObject->FileName;
if (0 != ReparsePointEcp->UnparsedNameLength &&
FileName.Length == ReparsePointEcp->UnparsedNameLength &&
ReparsePointEcp->Name.Length > ReparsePointEcp->UnparsedNameLength)
{
/*
* If the ReparsePointEcp name and our file name differ only in case,
* go ahead and overwrite our file name.
*/
UNICODE_STRING UnparsedName;
UnparsedName.Length = UnparsedName.MaximumLength = ReparsePointEcp->UnparsedNameLength;
UnparsedName.Buffer = (PWCH)((UINT8 *)ReparsePointEcp->Name.Buffer +
(ReparsePointEcp->Name.Length - UnparsedName.Length));
if (0 == FspFileNameCompare(&UnparsedName, &FileName, TRUE, 0))
RtlMoveMemory(FileName.Buffer, UnparsedName.Buffer, UnparsedName.Length);
}
}
#endif
}
if (!MainFileOpen)

12
tools/run-tests.bat
View File

@ -34,6 +34,7 @@ set dfl_tests=^
winfsp-tests-x64-flushpurge ^
winfsp-tests-x64-mountpoint-drive ^
winfsp-tests-x64-mountpoint-dir ^
winfsp-tests-x64-mountpoint-dir-case-sensitive ^
winfsp-tests-x64-no-traverse ^
winfsp-tests-x64-oplock ^
winfsp-tests-x64-external ^
@ -52,6 +53,7 @@ set dfl_tests=^
winfsp-tests-x86-flushpurge ^
winfsp-tests-x86-mountpoint-drive ^
winfsp-tests-x86-mountpoint-dir ^
winfsp-tests-x86-mountpoint-dir-case-sensitive ^
winfsp-tests-x86-no-traverse ^
winfsp-tests-x86-oplock ^
winfsp-tests-x86-external ^
@ -192,6 +194,11 @@ winfsp-tests-x64 --mountpoint=mymnt --case-insensitive
if !ERRORLEVEL! neq 0 goto fail
exit /b 0
:winfsp-tests-x64-mountpoint-dir-case-sensitive
winfsp-tests-x64 --mountpoint=mymnt
if !ERRORLEVEL! neq 0 goto fail
exit /b 0
:winfsp-tests-x64-no-traverse
winfsp-tests-x64 --no-traverse
if !ERRORLEVEL! neq 0 goto fail
@ -227,6 +234,11 @@ winfsp-tests-x86 --mountpoint=mymnt --case-insensitive
if !ERRORLEVEL! neq 0 goto fail
exit /b 0
:winfsp-tests-x86-mountpoint-dir-case-sensitive
winfsp-tests-x86 --mountpoint=mymnt
if !ERRORLEVEL! neq 0 goto fail
exit /b 0
:winfsp-tests-x86-no-traverse
winfsp-tests-x86 --no-traverse
if !ERRORLEVEL! neq 0 goto fail