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sys: hardcode AlwaysUseDoubleBuffering for Reads

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This commit is contained in:
Bill Zissimopoulos 2017-02-25 11:22:22 -08:00
parent 6774c34422
commit 4c0386bf8d
2 changed files with 12 additions and 4 deletions
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6
src/sys/driver.h
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@ -1139,12 +1139,10 @@ BOOLEAN FspWriteIrpShouldUseProcessBuffer(PIRP Irp, SIZE_T BufferSize)
{ {
ASSERT(0 != Irp); ASSERT(0 != Irp);
#if DBG #if DBG
return DEBUGTEST(50) || return DEBUGTEST(50);
#else #else
return FspProcessBufferSizeMax >= BufferSize || return FspProcessBufferSizeMax >= BufferSize;
#endif #endif
FspFsvolDeviceExtension(IoGetCurrentIrpStackLocation(Irp)->DeviceObject)->
VolumeParams.AlwaysUseDoubleBuffering;
} }
static inline static inline
BOOLEAN FspQueryDirectoryIrpShouldUseProcessBuffer(PIRP Irp, SIZE_T BufferSize) BOOLEAN FspQueryDirectoryIrpShouldUseProcessBuffer(PIRP Irp, SIZE_T BufferSize)

10
src/sys/volume.c
View File

@ -171,6 +171,16 @@ static NTSTATUS FspVolumeCreateNoLock(
} }
VolumeParams.FileSystemName[sizeof VolumeParams.FileSystemName / sizeof(WCHAR) - 1] = L'\0'; VolumeParams.FileSystemName[sizeof VolumeParams.FileSystemName / sizeof(WCHAR) - 1] = L'\0';
#if !DBG
/*
* In Release builds we hardcode AlwaysUseDoubleBuffering for Reads as we do not want someone
* to use WinFsp to crash Windows.
*
* See http://www.osronline.com/showthread.cfm?link=282037
*/
VolumeParams.AlwaysUseDoubleBuffering = 1;
#endif
/* create volume guid */ /* create volume guid */
Result = FspCreateGuid(&Guid); Result = FspCreateGuid(&Guid);
if (!NT_SUCCESS(Result)) if (!NT_SUCCESS(Result))