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sys: create: FspFsvolCreate

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Only check reparse point ECP if running on OS prior to RS4
This commit is contained in:
Bill Zissimopoulos 2018-09-06 17:52:52 -07:00
parent 52f0d1e1d8
commit 681eac9cd8
3 changed files with 45 additions and 37 deletions
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77
src/sys/create.c
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@ -169,46 +169,49 @@ static NTSTATUS FspFsvolCreate(
!FsRtlIsEcpFromUserMode(ExtraCreateParameter); !FsRtlIsEcpFromUserMode(ExtraCreateParameter);
#if defined(FSP_CREATE_REPARSE_POINT_ECP) #if defined(FSP_CREATE_REPARSE_POINT_ECP)
// {73d5118a-88ba-439f-92f4-46d38952d250} if (!HasReparsePointCaseSensitivityFix)
static const GUID FspReparsePointEcpGuid =
{ 0x73d5118a, 0x88ba, 0x439f, { 0x92, 0xf4, 0x46, 0xd3, 0x89, 0x52, 0xd2, 0x50 } };
typedef struct _REPARSE_POINT_ECP
{ {
USHORT UnparsedNameLength; // {73d5118a-88ba-439f-92f4-46d38952d250}
USHORT Flags; static const GUID FspReparsePointEcpGuid =
USHORT DeviceNameLength; { 0x73d5118a, 0x88ba, 0x439f, { 0x92, 0xf4, 0x46, 0xd3, 0x89, 0x52, 0xd2, 0x50 } };
PVOID Reserved; typedef struct _REPARSE_POINT_ECP
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)
{ {
/* USHORT UnparsedNameLength;
* If the ReparsePointEcp name and our file name differ only in case, USHORT Flags;
* go ahead and overwrite our file name. USHORT DeviceNameLength;
*/ PVOID Reserved;
UNICODE_STRING Name;
} REPARSE_POINT_ECP;
REPARSE_POINT_ECP *ReparsePointEcp;
UNICODE_STRING UnparsedName; ExtraCreateParameter = 0;
UnparsedName.Length = UnparsedName.MaximumLength = ReparsePointEcp->UnparsedNameLength; ReparsePointEcp =
UnparsedName.Buffer = (PWCH)((UINT8 *)ReparsePointEcp->Name.Buffer + NT_SUCCESS(FsRtlFindExtraCreateParameter(ExtraCreateParameters,
(ReparsePointEcp->Name.Length - UnparsedName.Length)); &FspReparsePointEcpGuid, &ExtraCreateParameter, 0)) &&
if (0 == FspFileNameCompare(&UnparsedName, &FileName, TRUE, 0)) 0 != ExtraCreateParameter &&
RtlMoveMemory(FileName.Buffer, UnparsedName.Buffer, UnparsedName.Length); !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 #endif

4
src/sys/driver.c
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@ -233,6 +233,9 @@ static VOID FspDriverMultiVersionInitialize(VOID)
if (RtlIsNtDdiVersionAvailable(NTDDI_WIN8)) if (RtlIsNtDdiVersionAvailable(NTDDI_WIN8))
FspMvMdlMappingNoWrite = MdlMappingNoWrite; FspMvMdlMappingNoWrite = MdlMappingNoWrite;
if (RtlIsNtDdiVersionAvailable(0x0A000005/*NTDDI_WIN10_RS4*/))
HasReparsePointCaseSensitivityFix = TRUE;
} }
#if defined(FSP_UNLOAD) #if defined(FSP_UNLOAD)
@ -270,3 +273,4 @@ CACHE_MANAGER_CALLBACKS FspCacheManagerCallbacks;
ULONG FspProcessorCount; ULONG FspProcessorCount;
FSP_MV_CcCoherencyFlushAndPurgeCache *FspMvCcCoherencyFlushAndPurgeCache; FSP_MV_CcCoherencyFlushAndPurgeCache *FspMvCcCoherencyFlushAndPurgeCache;
ULONG FspMvMdlMappingNoWrite = 0; ULONG FspMvMdlMappingNoWrite = 0;
BOOLEAN HasReparsePointCaseSensitivityFix = FALSE;

1
src/sys/driver.h
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@ -1577,6 +1577,7 @@ extern const GUID FspMainFileOpenEcpGuid;
extern ULONG FspProcessorCount; extern ULONG FspProcessorCount;
extern FSP_MV_CcCoherencyFlushAndPurgeCache *FspMvCcCoherencyFlushAndPurgeCache; extern FSP_MV_CcCoherencyFlushAndPurgeCache *FspMvCcCoherencyFlushAndPurgeCache;
extern ULONG FspMvMdlMappingNoWrite; extern ULONG FspMvMdlMappingNoWrite;
extern BOOLEAN HasReparsePointCaseSensitivityFix;
/* /*
* Fixes * Fixes