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Major refactoring: WIP

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This commit is contained in:
Bill Zissimopoulos 2015-12-20 10:57:45 -08:00
parent f099fe4bff
commit 7197501c9a
47 changed files with 2622 additions and 1982 deletions
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3
build/VStudio/testing/mirror.vcxproj
View File

@ -165,9 +165,6 @@
<OptimizeReferences>true</OptimizeReferences>
</Link>
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="..\..\..\tst\mirror\mirror.c" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\winfsp_dll.vcxproj">
<Project>{4a7c0b21-9e10-4c81-92de-1493efcf24eb}</Project>

5
build/VStudio/testing/mirror.vcxproj.filters
View File

@ -6,9 +6,4 @@
<Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\..\tst\mirror\mirror.c">
<Filter>Source</Filter>
</ClCompile>
</ItemGroup>
</Project>

3
build/VStudio/testing/winfsp-tests.vcxproj
View File

@ -176,9 +176,6 @@
<WarningLevel Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">TurnOffAllWarnings</WarningLevel>
<WarningLevel Condition="'$(Configuration)|$(Platform)'=='Release|x64'">TurnOffAllWarnings</WarningLevel>
</ClCompile>
<ClCompile Include="..\..\..\tst\winfsp-tests\mount-test.c" />
<ClCompile Include="..\..\..\tst\winfsp-tests\timeout-test.c" />
<ClCompile Include="..\..\..\tst\winfsp-tests\winfsp-tests.c" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\..\ext\tlib\testsuite.h" />

9
build/VStudio/testing/winfsp-tests.vcxproj.filters
View File

@ -10,18 +10,9 @@
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\..\tst\winfsp-tests\winfsp-tests.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\..\tst\winfsp-tests\mount-test.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\..\ext\tlib\testsuite.c">
<Filter>Source\tlib</Filter>
</ClCompile>
<ClCompile Include="..\..\..\tst\winfsp-tests\timeout-test.c">
<Filter>Source</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\..\ext\tlib\testsuite.h">

12
build/VStudio/winfsp_dll.vcxproj
View File

@ -178,18 +178,6 @@
<MapFileName>$(OutDir)$(TargetFileName).map</MapFileName>
</Link>
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="..\..\src\dll\debug.c" />
<ClCompile Include="..\..\src\dll\fsctl.c" />
<ClCompile Include="..\..\src\dll\library.c" />
<ClCompile Include="..\..\src\dll\loop.c" />
<ClCompile Include="..\..\src\dll\ntstatus.c" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\inc\winfsp\fsctl.h" />
<ClInclude Include="..\..\inc\winfsp\winfsp.h" />
<ClInclude Include="..\..\src\dll\library.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
</ImportGroup>

28
build/VStudio/winfsp_dll.vcxproj.filters
View File

@ -13,32 +13,4 @@
<UniqueIdentifier>{1d6501f4-cebd-4a00-a774-deb782b59fb5}</UniqueIdentifier>
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\src\dll\fsctl.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\dll\ntstatus.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\dll\debug.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\dll\loop.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\dll\library.c">
<Filter>Source</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\inc\winfsp\fsctl.h">
<Filter>Include\winfsp</Filter>
</ClInclude>
<ClInclude Include="..\..\inc\winfsp\winfsp.h">
<Filter>Include\winfsp</Filter>
</ClInclude>
<ClInclude Include="..\..\src\dll\library.h">
<Filter>Source</Filter>
</ClInclude>
</ItemGroup>
</Project>

6
build/VStudio/winfsp_sys.vcxproj
View File

@ -157,24 +157,20 @@
<ClCompile Include="..\..\src\sys\ea.c" />
<ClCompile Include="..\..\src\sys\fastio.c" />
<ClCompile Include="..\..\src\sys\fileinfo.c" />
<ClCompile Include="..\..\src\sys\fileobj.c" />
<ClCompile Include="..\..\src\sys\flush.c" />
<ClCompile Include="..\..\src\sys\fsctl.c" />
<ClCompile Include="..\..\src\sys\idevctl.c" />
<ClCompile Include="..\..\src\sys\iop.c" />
<ClCompile Include="..\..\src\sys\ioq.c" />
<ClCompile Include="..\..\src\sys\lockctl.c" />
<ClCompile Include="..\..\src\sys\misc.c" />
<ClCompile Include="..\..\src\sys\read.c" />
<ClCompile Include="..\..\src\sys\resource.c" />
<ClCompile Include="..\..\src\sys\security.c" />
<ClCompile Include="..\..\src\sys\shutdown.c" />
<ClCompile Include="..\..\src\sys\util.c" />
<ClCompile Include="..\..\src\sys\volinfo.c" />
<ClCompile Include="..\..\src\sys\write.c" />
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\inc\winfsp\fsctl.h" />
<ClInclude Include="..\..\inc\winfsp\winfsp.h" />
<ClInclude Include="..\..\src\sys\driver.h" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />

48
build/VStudio/winfsp_sys.vcxproj.filters
View File

@ -14,16 +14,28 @@
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\src\sys\cleanup.c">
<ClCompile Include="..\..\src\sys\driver.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\close.c">
<ClCompile Include="..\..\src\sys\debug.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\device.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\ioq.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\iop.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\create.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\debug.c">
<ClCompile Include="..\..\src\sys\cleanup.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\close.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\devctl.c">
@ -32,33 +44,21 @@
<ClCompile Include="..\..\src\sys\dirctl.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\driver.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\ea.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\fastio.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\fileinfo.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\flush.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\fsctl.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\lockctl.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\read.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\resource.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\security.c">
<Filter>Source</Filter>
</ClCompile>
@ -71,22 +71,13 @@
<ClCompile Include="..\..\src\sys\write.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\misc.c">
<ClCompile Include="..\..\src\sys\fastio.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\ioq.c">
<ClCompile Include="..\..\src\sys\fsctl.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\iop.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\device.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\fileobj.c">
<Filter>Source</Filter>
</ClCompile>
<ClCompile Include="..\..\src\sys\idevctl.c">
<ClCompile Include="..\..\src\sys\util.c">
<Filter>Source</Filter>
</ClCompile>
</ItemGroup>
@ -97,8 +88,5 @@
<ClInclude Include="..\..\inc\winfsp\fsctl.h">
<Filter>Include\winfsp</Filter>
</ClInclude>
<ClInclude Include="..\..\inc\winfsp\winfsp.h">
<Filter>Include\winfsp</Filter>
</ClInclude>
</ItemGroup>
</Project>

20
inc/winfsp/fsctl.h
View File

@ -28,18 +28,11 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
/* fsctl device codes */
#define FSP_FSCTL_CREATE \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'C', METHOD_BUFFERED, FILE_ANY_ACCESS)
/* fsvrt device codes */
#define FSP_FSCTL_DELETE \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'D', METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSP_FSCTL_TRANSACT \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'T', METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSP_FSCTL_CREATE_BUFFER_SIZEMIN 128
#define FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMIN 16384 /* checked by driver! */
#define FSP_FSCTL_TRANSACT_RSP_BUFFER_SIZEMIN 16384 /* not checked by driver! */
#define FSP_FSCTL_VOLUME_PARAMS_SIZE FSP_FSCTL_DEFAULT_ALIGN_UP(sizeof(FSP_FSCTL_VOLUME_PARAMS))
#define FSP_FSCTL_TRANSACT_REQ_SIZEMAX (4096 - 64) /* 64: size for internal request header */
#define FSP_FSCTL_TRANSACT_RSP_SIZEMAX (4096 - 64) /* symmetry! */
@ -50,7 +43,6 @@ enum
{
FspFsctlTransactUnknownKind = 0,
FspFsctlTransactCreateKind,
FspFsctlTransactCreateCleanupCloseKind,
FspFsctlTransactCloseKind,
FspFsctlTransactReadKind,
FspFsctlTransactWriteKind,
@ -90,7 +82,6 @@ typedef struct
UINT32 IrpTimeout; /* milliseconds; values between 1 min and 10 min */
UINT32 EaSupported:1; /* supports extended attributes (unimplemented; set to 0) */
UINT32 FileNameRequired:1; /* FileName required for all operations (not just Create) */
UINT32 NoSystemAccessCheck:1; /* if set the user-mode flie system performs access checks */
} FSP_FSCTL_VOLUME_PARAMS;
typedef struct
{
@ -155,8 +146,6 @@ typedef struct
{
UINT64 UserContext; /* open file user context (unique file id) */
UINT64 UserContext2; /* kernel file object user context (only low 32 bits valid) */
UINT32 FileAttributes; /* FILE_ATTRIBUTE_{NORMAL,DIRECTORY,etc.} */
FSP_FSCTL_TRANSACT_BUF SecurityDescriptor; /* security descriptor */
} Opened;
/* IoStatus.Status == STATUS_REPARSE */
struct
@ -210,15 +199,6 @@ static inline FSP_FSCTL_TRANSACT_RSP *FspFsctlTransactConsumeResponse(
}
#if !defined(WINFSP_SYS_INTERNAL)
FSP_API NTSTATUS FspFsctlCreateVolume(PWSTR DevicePath,
const FSP_FSCTL_VOLUME_PARAMS *Params, PSECURITY_DESCRIPTOR SecurityDescriptor,
PWCHAR VolumePathBuf, SIZE_T VolumePathSize);
FSP_API NTSTATUS FspFsctlOpenVolume(PWSTR VolumePath,
PHANDLE PVolumeHandle);
FSP_API NTSTATUS FspFsctlDeleteVolume(HANDLE VolumeHandle);
FSP_API NTSTATUS FspFsctlTransact(HANDLE VolumeHandle,
PVOID ResponseBuf, SIZE_T ResponseBufSize,
PVOID RequestBuf, SIZE_T *PRequestBufSize);
#endif
#endif

109
src/sys/cleanup.c
View File

@ -23,14 +23,18 @@ FSP_DRIVER_DISPATCH FspCleanup;
#pragma alloc_text(PAGE, FspCleanup)
#endif
VOID FspFsctlDeleteVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsctlCleanup(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
FspFsctlDeleteVolume(DeviceObject, Irp, IrpSp);
Irp->IoStatus.Information = 0;
return Result;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvrtCleanup(
@ -38,9 +42,8 @@ static NTSTATUS FspFsvrtCleanup(
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
return Result;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolCleanup(
@ -48,101 +51,7 @@ static NTSTATUS FspFsvolCleanup(
{
PAGED_CODE();
/* is this a valid FileObject? */
if (!FspFileContextIsValid(IrpSp->FileObject->FsContext))
return STATUS_SUCCESS;
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_CONTEXT *FsContext = FileObject->FsContext;
UINT64 UserContext = FsContext->UserContext;
UINT64 UserContext2 = (UINT_PTR)FileObject->FsContext2;
BOOLEAN DeletePending;
LONG OpenCount;
/* lock the FsContext */
ExAcquireResourceExclusiveLite(FsContext->Header.Resource, TRUE);
/* propagate the FsContext DeleteOnClose to DeletePending */
if (FsContext->DeleteOnClose)
FsContext->DeletePending = TRUE;
DeletePending = FsContext->DeletePending;
/* all handles on this FileObject are gone; decrement its FsContext->OpenCount */
OpenCount = FspFileContextClose(FsContext);
/* unlock the FsContext */
ExReleaseResourceLite(FsContext->Header.Resource);
/* is the FsContext going away as well? */
if (0 == OpenCount)
{
/*
* The following must be done under the file system volume device Resource,
* because we are manipulating its GenericTable.
*/
ExAcquireResourceExclusiveLite(&FsvolDeviceExtension->Base.Resource, TRUE);
try
{
/* remove the FsContext from the file system volume device generic table */
FspFsvolDeviceDeleteContext(DeviceObject, FsContext->UserContext, 0);
}
finally
{
ExReleaseResourceLite(&FsvolDeviceExtension->Base.Resource);
}
}
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
if (!FspDeviceRetain(FsvrtDeviceObject))
/* IRP_MJ_CLEANUP cannot really fail :-\ */
return STATUS_SUCCESS;
try
{
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
BOOLEAN FileNameRequired = 0 != FsvrtDeviceExtension->VolumeParams.FileNameRequired;
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request */
Result = FspIopCreateRequest(Irp, FileNameRequired ? &FsContext->FileName : 0, 0, &Request);
if (!NT_SUCCESS(Result))
goto leak_exit;
/*
* The new request is associated with our IRP and will be deleted during its completion.
*/
/* populate the Cleanup request */
Request->Kind = FspFsctlTransactCleanupKind;
Request->Req.Cleanup.UserContext = UserContext;
Request->Req.Cleanup.UserContext2 = UserContext2;
Request->Req.Cleanup.Delete = DeletePending && 0 == OpenCount;
Result = STATUS_PENDING;
goto exit;
leak_exit:;
#if DBG
DEBUGLOG("FileObject=%p[%p:\"%wZ\"], UserContext=%llx, UserContext2=%llx: "
"error: the user-mode file system handle will be leaked!",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName,
UserContext, UserContext2);
#endif
/* IRP_MJ_CLEANUP cannot really fail :-\ */
Result = STATUS_SUCCESS;
exit:;
}
finally
{
FspDeviceRelease(FsvrtDeviceObject);
}
return Result;
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolCleanupComplete(
@ -158,8 +67,6 @@ NTSTATUS FspCleanup(
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_CLEANUP == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:

76
src/sys/close.c
View File

@ -28,9 +28,8 @@ static NTSTATUS FspFsctlClose(
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
return Result;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvrtClose(
@ -38,9 +37,8 @@ static NTSTATUS FspFsvrtClose(
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
return Result;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolClose(
@ -48,73 +46,7 @@ static NTSTATUS FspFsvolClose(
{
PAGED_CODE();
/* is this a valid FileObject? */
if (!FspFileContextIsValid(IrpSp->FileObject->FsContext))
return STATUS_SUCCESS;
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_CONTEXT *FsContext = FileObject->FsContext;
UINT64 UserContext = FsContext->UserContext;
UINT64 UserContext2 = (UINT_PTR)FileObject->FsContext2;
/* dereference the FsContext (and delete if no more references) */
FspFileContextRelease(FsContext);
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
if (!FspDeviceRetain(FsvrtDeviceObject))
/* IRP_MJ_CLOSE cannot really fail :-\ */
return STATUS_SUCCESS;
try
{
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
BOOLEAN FileNameRequired = 0 != FsvrtDeviceExtension->VolumeParams.FileNameRequired;
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request */
Result = FspIopCreateRequest(0, FileNameRequired ? &FsContext->FileName : 0, 0, &Request);
if (!NT_SUCCESS(Result))
goto leak_exit;
/*
* The new request is associated with our IRP and will be deleted during its completion.
*/
/* populate the Close request */
Request->Kind = FspFsctlTransactCloseKind;
Request->Req.Close.UserContext = UserContext;
Request->Req.Close.UserContext2 = UserContext2;
/* post as a work request; this allows us to complete our own IRP and return immediately! */
if (!FspIopPostWorkRequest(DeviceObject, Request))
/* no need to delete the request here as FspIopPostWorkRequest() will do so in all cases */
goto leak_exit;
Result = STATUS_SUCCESS;
goto exit;
leak_exit:;
#if DBG
DEBUGLOG("FileObject=%p[%p:\"%wZ\"], UserContext=%llx, UserContext2=%llx: "
"error: the user-mode file system handle will be leaked!",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName,
UserContext, UserContext2);
#endif
/* IRP_MJ_CLOSE cannot really fail :-\ */
Result = STATUS_SUCCESS;
exit:;
}
finally
{
FspDeviceRelease(FsvrtDeviceObject);
}
return Result;
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolCloseComplete(
@ -130,8 +62,6 @@ NTSTATUS FspClose(
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_CLOSE == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:

664
src/sys/create.c
View File

@ -14,9 +14,7 @@ static NTSTATUS FspFsvolCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOPREP_DISPATCH FspFsvolCreatePrepare;
FSP_IOCMPL_DISPATCH FspFsvolCreateComplete;
static VOID FspFsvolCreateCleanupClose(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
FSP_IOP_REQUEST_FINI FspFsvolCreateRequestFini;
static FSP_IOP_REQUEST_FINI FspFsvolCreateRequestFini;
FSP_DRIVER_DISPATCH FspCreate;
#ifdef ALLOC_PRAGMA
@ -25,25 +23,17 @@ FSP_DRIVER_DISPATCH FspCreate;
#pragma alloc_text(PAGE, FspFsvolCreate)
#pragma alloc_text(PAGE, FspFsvolCreatePrepare)
#pragma alloc_text(PAGE, FspFsvolCreateComplete)
#pragma alloc_text(PAGE, FspFsvolCreateCleanupClose)
#pragma alloc_text(PAGE, FspFsvolCreateRequestFini)
#pragma alloc_text(PAGE, FspCreate)
#endif
enum
{
RequestFsContext = 0,
RequestAccessToken,
};
static NTSTATUS FspFsctlCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
return Result;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvrtCreate(
@ -51,9 +41,8 @@ static NTSTATUS FspFsvrtCreate(
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
return Result;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolCreate(
@ -61,280 +50,7 @@ static NTSTATUS FspFsvolCreate(
{
PAGED_CODE();
/* open the volume object? */
if (0 == IrpSp->FileObject->FileName.Length &&
(0 == IrpSp->FileObject->RelatedFileObject ||
0 == IrpSp->FileObject->RelatedFileObject->FsContext))
{
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
IrpSp->FileObject->Vpb = FsvrtDeviceObject->Vpb;
Irp->IoStatus.Information = FILE_OPENED;
return STATUS_SUCCESS;
}
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
if (!FspDeviceRetain(FsvrtDeviceObject))
return STATUS_CANCELLED;
try
{
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
PFILE_OBJECT FileObject = IrpSp->FileObject;
PFILE_OBJECT RelatedFileObject = FileObject->RelatedFileObject;
UNICODE_STRING FileName = FileObject->FileName;
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ULONG CreateOptions = IrpSp->Parameters.Create.Options;
USHORT FileAttributes = IrpSp->Parameters.Create.FileAttributes;
PSECURITY_DESCRIPTOR SecurityDescriptor = AccessState->SecurityDescriptor;
ULONG SecurityDescriptorSize = 0;
LARGE_INTEGER AllocationSize = Irp->Overlay.AllocationSize;
ACCESS_MASK DesiredAccess = IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
PFILE_FULL_EA_INFORMATION EaBuffer = Irp->AssociatedIrp.SystemBuffer;
//ULONG EaLength = IrpSp->Parameters.Create.EaLength;
ULONG Flags = IrpSp->Flags;
KPROCESSOR_MODE RequestorMode =
FlagOn(Flags, SL_FORCE_ACCESS_CHECK) ? UserMode : Irp->RequestorMode;
BOOLEAN HasTraversePrivilege =
BooleanFlagOn(AccessState->Flags, TOKEN_HAS_TRAVERSE_PRIVILEGE);
BOOLEAN IsAbsoluteSecurityDescriptor = FALSE;
BOOLEAN IsSelfRelativeSecurityDescriptor = FALSE;
BOOLEAN HasTrailingBackslash = FALSE;
FSP_FILE_CONTEXT *FsContext = 0;
FSP_FSCTL_TRANSACT_REQ *Request;
/* cannot open a paging file */
if (FlagOn(Flags, SL_OPEN_PAGING_FILE))
{
Result = STATUS_ACCESS_DENIED;
goto exit;
}
/* cannot open files by fileid */
if (FlagOn(CreateOptions, FILE_OPEN_BY_FILE_ID))
{
Result = STATUS_NOT_IMPLEMENTED;
goto exit;
}
/* do we support EA? */
if (0 != EaBuffer && !FsvrtDeviceExtension->VolumeParams.EaSupported)
{
Result = STATUS_EAS_NOT_SUPPORTED;
goto exit;
}
/* check create options */
if (FlagOn(CreateOptions, FILE_NON_DIRECTORY_FILE) &&
FlagOn(CreateOptions, FILE_DIRECTORY_FILE))
{
Result = STATUS_INVALID_PARAMETER;
goto exit;
}
/* check security descriptor validity */
if (0 != SecurityDescriptor)
{
IsAbsoluteSecurityDescriptor = RtlValidSecurityDescriptor(SecurityDescriptor);
if (IsAbsoluteSecurityDescriptor)
{
Result = RtlAbsoluteToSelfRelativeSD(SecurityDescriptor, 0, &SecurityDescriptorSize);
if (STATUS_BUFFER_TOO_SMALL != Result)
{
Result = STATUS_INVALID_PARAMETER;
goto exit;
}
}
else
{
SecurityDescriptorSize = RtlLengthSecurityDescriptor(SecurityDescriptor);
IsSelfRelativeSecurityDescriptor = RtlValidRelativeSecurityDescriptor(
SecurityDescriptor, SecurityDescriptorSize, 0);
if (!IsSelfRelativeSecurityDescriptor)
{
Result = STATUS_INVALID_PARAMETER;
goto exit;
}
}
}
/* according to fastfat, filenames that begin with two backslashes are ok */
if (sizeof(WCHAR) * 2 <= FileName.Length &&
L'\\' == FileName.Buffer[1] && L'\\' == FileName.Buffer[0])
{
FileName.Length -= sizeof(WCHAR);
FileName.MaximumLength -= sizeof(WCHAR);
FileName.Buffer++;
if (sizeof(WCHAR) * 2 <= FileName.Length &&
L'\\' == FileName.Buffer[1] && L'\\' == FileName.Buffer[0])
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
}
/* check for trailing backslash */
if (sizeof(WCHAR) * 2/* not empty or root */ <= FileName.Length &&
L'\\' == FileName.Buffer[FileName.Length / 2 - 1])
{
FileName.Length -= sizeof(WCHAR);
HasTrailingBackslash = TRUE;
if (sizeof(WCHAR) * 2 <= FileName.Length && L'\\' == FileName.Buffer[FileName.Length / 2 - 1])
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
}
if (HasTrailingBackslash && !FlagOn(CreateOptions, FILE_DIRECTORY_FILE))
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
/* is this a relative or absolute open? */
if (0 != RelatedFileObject)
{
FSP_FILE_CONTEXT *RelatedFsContext = RelatedFileObject->FsContext;
/* is this a valid RelatedFileObject? */
if (!FspFileContextIsValid(RelatedFsContext))
{
Result = STATUS_OBJECT_PATH_NOT_FOUND;
goto exit;
}
/* must be a relative path */
if (sizeof(WCHAR) <= FileName.Length && L'\\' == FileName.Buffer[0])
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
/* cannot FILE_DELETE_ON_CLOSE on the root directory */
if (sizeof(WCHAR) == RelatedFsContext->FileName.Length &&
0 == FileName.Length &&
FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
{
Result = STATUS_CANNOT_DELETE;
goto exit;
}
/*
* There is no need to lock our accesses of RelatedFileObject->FsContext->FileName,
* because RelatedFileObject->FsContext->Filename is read-only (after creation) and
* because RelatedFileObject->FsContext is guaranteed to exist while RelatedFileObject
* exists.
*/
BOOLEAN AppendBackslash =
sizeof(WCHAR) * 2/* not empty or root */ <= RelatedFsContext->FileName.Length &&
sizeof(WCHAR) <= FileName.Length && L':' != FileName.Buffer[0];
Result = FspFileContextCreate(DeviceObject,
RelatedFsContext->FileName.Length + AppendBackslash * sizeof(WCHAR) + FileName.Length,
&FsContext);
if (!NT_SUCCESS(Result))
goto exit;
Result = RtlAppendUnicodeStringToString(&FsContext->FileName, &RelatedFsContext->FileName);
ASSERT(NT_SUCCESS(Result));
if (AppendBackslash)
{
Result = RtlAppendUnicodeToString(&FsContext->FileName, L"\\");
ASSERT(NT_SUCCESS(Result));
}
}
else
{
/* must be an absolute path */
if (sizeof(WCHAR) <= FileName.Length && L'\\' != FileName.Buffer[0])
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
/* cannot FILE_DELETE_ON_CLOSE on the root directory */
if (sizeof(WCHAR) == FileName.Length &&
FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
{
Result = STATUS_CANNOT_DELETE;
goto exit;
}
Result = FspFileContextCreate(DeviceObject,
FileName.Length,
&FsContext);
if (!NT_SUCCESS(Result))
goto exit;
}
Result = RtlAppendUnicodeStringToString(&FsContext->FileName, &FileName);
ASSERT(NT_SUCCESS(Result));
/* create the user-mode file system request */
Result = FspIopCreateRequestEx(Irp, &FsContext->FileName, SecurityDescriptorSize,
FspFsvolCreateRequestFini, &Request);
if (!NT_SUCCESS(Result))
{
FspFileContextRelease(FsContext);
goto exit;
}
/*
* The new request is associated with our IRP and will be deleted during its completion.
* Go ahead and associate our FsContext with the Request as well.
*/
FspIopRequestContext(Request, RequestFsContext) = FsContext;
/* populate the Create request */
Request->Kind = FspFsctlTransactCreateKind;
Request->Req.Create.CreateOptions = CreateOptions;
Request->Req.Create.FileAttributes = FileAttributes;
Request->Req.Create.SecurityDescriptor.Offset = 0 == SecurityDescriptorSize ? 0 :
FSP_FSCTL_DEFAULT_ALIGN_UP(Request->FileName.Size);
Request->Req.Create.SecurityDescriptor.Size = (UINT16)SecurityDescriptorSize;
Request->Req.Create.AllocationSize = AllocationSize.QuadPart;
Request->Req.Create.AccessToken = 0;
Request->Req.Create.DesiredAccess = DesiredAccess;
Request->Req.Create.ShareAccess = ShareAccess;
Request->Req.Create.Ea.Offset = 0;
Request->Req.Create.Ea.Size = 0;
Request->Req.Create.UserMode = UserMode == RequestorMode;
Request->Req.Create.HasTraversePrivilege = HasTraversePrivilege;
Request->Req.Create.OpenTargetDirectory = BooleanFlagOn(Flags, SL_OPEN_TARGET_DIRECTORY);
Request->Req.Create.CaseSensitive = BooleanFlagOn(Flags, SL_CASE_SENSITIVE);
/* copy the security descriptor into the request */
if (IsAbsoluteSecurityDescriptor)
{
Result = RtlAbsoluteToSelfRelativeSD(SecurityDescriptor,
Request->Buffer + Request->Req.Create.SecurityDescriptor.Offset, &SecurityDescriptorSize);
if (!NT_SUCCESS(Result))
{
if (STATUS_BAD_DESCRIPTOR_FORMAT == Result || STATUS_BUFFER_TOO_SMALL == Result)
Result = STATUS_INVALID_PARAMETER; /* should not happen */
goto exit;
}
}
else if (IsSelfRelativeSecurityDescriptor)
RtlCopyMemory(Request->Buffer + Request->Req.Create.SecurityDescriptor.Offset,
SecurityDescriptor, SecurityDescriptorSize);
Result = STATUS_PENDING;
exit:;
}
finally
{
FspDeviceRelease(FsvrtDeviceObject);
}
return Result;
return STATUS_INVALID_DEVICE_REQUEST;
}
NTSTATUS FspFsvolCreatePrepare(
@ -342,30 +58,6 @@ NTSTATUS FspFsvolCreatePrepare(
{
FSP_ENTER_IOP(PAGED_CODE());
PDEVICE_OBJECT DeviceObject = IrpSp->DeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =
FspFsvrtDeviceExtension(FsvolDeviceExtension->FsvrtDeviceObject);
/* is the user-mode file system doing access checks? */
if (!FsvrtDeviceExtension->VolumeParams.NoSystemAccessCheck)
{
ASSERT(0 == Request->Req.Create.AccessToken);
FSP_RETURN(Result = STATUS_SUCCESS);
}
/* get a user-mode handle to the access token */
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
HANDLE UserModeAccessToken;
Result = ObOpenObjectByPointer(SeQuerySubjectContextToken(&AccessState->SubjectSecurityContext),
0, 0, TOKEN_QUERY, *SeTokenObjectType, UserMode, &UserModeAccessToken);
if (!NT_SUCCESS(Result))
FSP_RETURN();
/* send the user-mode handle to the user-mode file system */
FspIopRequestContext(Request, RequestAccessToken) = UserModeAccessToken;
Request->Req.Create.AccessToken = (UINT_PTR)UserModeAccessToken;
FSP_LEAVE_IOP();
}
@ -374,358 +66,14 @@ VOID FspFsvolCreateComplete(
{
FSP_ENTER_IOC(PAGED_CODE());
/*
* NOTE:
* In the following we may have to close the just opened file object. But we must
* never close a file we just created, because this will leave an orphan file on
* the disk.
*
* Files may have to be closed if a security access or share access check fails. In
* both those cases we were opening an existing file and so it is safe to close it.
*
* Because of how IRP_MJ_CREATE works in Windows, it is difficult to improve on this
* scheme without introducing a 2-phase Create protocol, which is undesirable as it
* means two trips into user-mode for a single Create request.
*/
PDEVICE_OBJECT DeviceObject = IrpSp->DeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
PFILE_OBJECT FileObject = IrpSp->FileObject;
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ULONG CreateOptions = IrpSp->Parameters.Create.Options;
BOOLEAN FileCreated = FILE_CREATED == Response->IoStatus.Information;
UINT32 ResponseFileAttributes = Response->Rsp.Create.Opened.FileAttributes;
PSECURITY_DESCRIPTOR SecurityDescriptor;
ULONG SecurityDescriptorSize;
UNICODE_STRING ReparseFileName;
ACCESS_MASK DesiredAccess = IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
PPRIVILEGE_SET Privileges = 0;
USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
ULONG Flags = IrpSp->Flags;
KPROCESSOR_MODE RequestorMode =
FlagOn(Flags, SL_FORCE_ACCESS_CHECK) ? UserMode : Irp->RequestorMode;
FSP_FILE_CONTEXT *FsContext = FspIopRequestContext(Request, RequestFsContext);
ACCESS_MASK GrantedAccess;
BOOLEAN Inserted = FALSE;
/* did the user-mode file system sent us a failure code? */
if (!NT_SUCCESS(Response->IoStatus.Status))
{
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_RETURN();
}
/* special case STATUS_REPARSE */
if (STATUS_REPARSE == Result)
{
ReparseFileName.Buffer =
(PVOID)(Response->Buffer + Response->Rsp.Create.Reparse.FileName.Offset);
ReparseFileName.Length = ReparseFileName.MaximumLength =
Response->Rsp.Create.Reparse.FileName.Size;
Result = STATUS_ACCESS_DENIED;
if (IO_REPARSE == Response->IoStatus.Information)
{
if (0 == ReparseFileName.Length ||
(PUINT8)ReparseFileName.Buffer + ReparseFileName.Length >
(PUINT8)Response + Response->Size)
FSP_RETURN();
if (ReparseFileName.Length > FileObject->FileName.MaximumLength)
{
PVOID Buffer = FspAllocExternal(ReparseFileName.Length);
if (0 == Buffer)
FSP_RETURN(Result = STATUS_INSUFFICIENT_RESOURCES);
FspFreeExternal(FileObject->FileName.Buffer);
FileObject->FileName.MaximumLength = ReparseFileName.Length;
FileObject->FileName.Buffer = Buffer;
}
FileObject->FileName.Length = 0;
RtlCopyUnicodeString(&FileObject->FileName, &ReparseFileName);
}
else
if (IO_REMOUNT == Response->IoStatus.Information)
{
if (0 != ReparseFileName.Length)
FSP_RETURN();
}
else
FSP_RETURN();
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_RETURN();
}
/* are we doing access checks? */
if (!FsvrtDeviceExtension->VolumeParams.NoSystemAccessCheck)
{
/* read-only attribute check */
if (!FileCreated && FlagOn(ResponseFileAttributes, FILE_ATTRIBUTE_READONLY))
{
/* from fastfat: allowed accesses when read-only */
ACCESS_MASK Allowed =
DELETE | READ_CONTROL | WRITE_OWNER | WRITE_DAC |
SYNCHRONIZE | ACCESS_SYSTEM_SECURITY |
FILE_READ_DATA | FILE_READ_EA | FILE_WRITE_EA |
FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES |
FILE_EXECUTE | FILE_TRAVERSE | FILE_LIST_DIRECTORY |
FILE_ADD_SUBDIRECTORY | FILE_ADD_FILE | FILE_DELETE_CHILD;
if (FlagOn(DesiredAccess, ~Allowed))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_ACCESS_DENIED);
}
else
if (!FlagOn(ResponseFileAttributes, FILE_ATTRIBUTE_DIRECTORY) &&
FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_CANNOT_DELETE);
}
}
/* security descriptor check */
SecurityDescriptor =
(PVOID)(Response->Buffer + Response->Rsp.Create.Opened.SecurityDescriptor.Offset);
SecurityDescriptorSize = Response->Rsp.Create.Opened.SecurityDescriptor.Size;
if (0 != SecurityDescriptorSize)
{
if ((PUINT8)SecurityDescriptor + SecurityDescriptorSize >
(PUINT8)Response + Response->Size ||
!FspValidRelativeSecurityDescriptor(SecurityDescriptor, SecurityDescriptorSize, 0))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_ACCESS_DENIED);
}
/* access check */
if (!SeAccessCheck(SecurityDescriptor,
&AccessState->SubjectSecurityContext,
FALSE,
DesiredAccess,
AccessState->PreviouslyGrantedAccess,
&Privileges,
IoGetFileObjectGenericMapping(),
RequestorMode,
&GrantedAccess,
&Result))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN();
}
if (0 != Privileges)
{
Result = SeAppendPrivileges(AccessState, Privileges);
SeFreePrivileges(Privileges);
if (!NT_SUCCESS(Result))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN();
}
}
SetFlag(AccessState->PreviouslyGrantedAccess, GrantedAccess);
ClearFlag(AccessState->RemainingDesiredAccess, GrantedAccess);
}
}
/* were we asked to open a directory or non-directory? */
if (FlagOn(CreateOptions, FILE_DIRECTORY_FILE) &&
!FileCreated && !FlagOn(ResponseFileAttributes, FILE_ATTRIBUTE_DIRECTORY))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_NOT_A_DIRECTORY);
}
if (FlagOn(CreateOptions, FILE_NON_DIRECTORY_FILE) &&
!FileCreated && FlagOn(ResponseFileAttributes, FILE_ATTRIBUTE_DIRECTORY))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_FILE_IS_A_DIRECTORY);
}
/*
* The following must be done under the file system volume device Resource,
* because we are manipulating its GenericTable and accessing foreign FsContext's.
*/
ExAcquireResourceExclusiveLite(&FsvolDeviceExtension->Base.Resource, TRUE);
try
{
/* insert the newly created FsContext into our generic table */
FsContext = FspFsvolDeviceInsertContext(DeviceObject,
FsContext->UserContext, FsContext, &FsContext->ElementStorage, &Inserted);
ASSERT(0 != FsContext);
/* share access check */
if (Inserted)
{
/*
* This is a newly created FsContext. Set its share access and
* increment its open count. There is no need to acquire the
* FsContext's Resource (because it is newly created).
*/
IoSetShareAccess(AccessState->PreviouslyGrantedAccess,
ShareAccess, FileObject, &FsContext->ShareAccess);
FspFileContextOpen(FsContext);
if (FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
FsContext->DeleteOnClose = TRUE;
Result = STATUS_SUCCESS;
}
else
{
/*
* This is an existing FsContext. We must acquire its Resource and
* check if there is a delete pending and the share access. Only if
* both tests succeed we increment the open count and report success.
*/
ExAcquireResourceExclusiveLite(FsContext->Header.Resource, TRUE);
if (FsContext->DeletePending)
Result = STATUS_DELETE_PENDING;
else
Result = IoCheckShareAccess(AccessState->PreviouslyGrantedAccess,
ShareAccess, FileObject, &FsContext->ShareAccess, TRUE);
if (NT_SUCCESS(Result))
{
FspFileContextRetain(FsContext);
FspFileContextOpen(FsContext);
if (FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
FsContext->DeleteOnClose = TRUE;
}
ExReleaseResourceLite(FsContext->Header.Resource);
}
}
finally
{
ExReleaseResourceLite(&FsvolDeviceExtension->Base.Resource);
}
/* did we fail our share access checks? */
if (!NT_SUCCESS(Result))
{
ASSERT(!Inserted);
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN();
}
/*
* Looks like SUCCESS!
*/
/* did an FsContext with the same UserContext already exist? */
if (!Inserted)
/* delete the newly created FsContext as it is not being used */
FspFileContextRelease(FspIopRequestContext(Request, RequestFsContext));
/* disassociate our FsContext from the Request */
FspIopRequestContext(Request, RequestFsContext) = 0;
/* record the user-mode file system contexts */
FsContext->UserContext = Response->Rsp.Create.Opened.UserContext;
FileObject->FsContext = FsContext;
FileObject->FsContext2 = (PVOID)(UINT_PTR)Response->Rsp.Create.Opened.UserContext2;
/* finish seting up the FileObject */
FileObject->Vpb = FsvrtDeviceObject->Vpb;
/* SUCCESS! */
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_LEAVE_IOC(
"FileObject=%p[%p:\"%wZ\"]",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName);
}
static VOID FspFsvolCreateCleanupClose(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
static VOID FspFsvolCreateRequestFini(PVOID Context[3])
{
PAGED_CODE();
/*
* This routine handles the case where we must close an open file,
* because of a failure during Create completion. We simply create
* a CreateClose request and we post it as a work item.
*
* Ideally there would be no failure modes for this routine. Reality is
* different.
*
* The more serious (but perhaps non-existent in practice) failure is a
* memory allocation failure. In this case we will leak the user-mode
* file system handle!
*
* This routine may also fail if we cannot post a work item, which means that
* the virtual volume device and the file system volume device are being
* deleted. Because it is assumed that only the user-mode file system would
* initiate a device deletion, this case is more benign (presumably the file
* system knows to close off all its handles when tearing down its devices).
*/
NTSTATUS Result;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
PDEVICE_OBJECT DeviceObject = IrpSp->DeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =
FspFsvrtDeviceExtension(FsvolDeviceExtension->FsvrtDeviceObject);
FSP_FSCTL_TRANSACT_REQ *OriginalRequest = FspIrpRequest(Irp);
FSP_FILE_CONTEXT *FsContext = FspIopRequestContext(OriginalRequest, RequestFsContext);
UINT64 UserContext = Response->Rsp.Create.Opened.UserContext;
UINT64 UserContext2 = Response->Rsp.Create.Opened.UserContext2;
BOOLEAN FileNameRequired = 0 != FsvrtDeviceExtension->VolumeParams.FileNameRequired;
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request */
Result = FspIopCreateRequest(0, FileNameRequired ? &FsContext->FileName : 0, 0, &Request);
if (!NT_SUCCESS(Result))
goto leak_exit;
/* populate the CreateCleanupClose request */
Request->Kind = FspFsctlTransactCreateCleanupCloseKind;
Request->Req.Cleanup.UserContext = UserContext;
Request->Req.Cleanup.UserContext2 = UserContext2;
Request->Req.Cleanup.Delete = FILE_CREATED == Response->IoStatus.Information;
/* post as a work request */
if (!FspIopPostWorkRequest(DeviceObject, Request))
/* no need to delete the request here as FspIopPostWorkRequest() will do so in all cases */
goto leak_exit;
goto exit;
leak_exit:;
#if DBG
DEBUGLOG("FileObject=%p[%p:\"%wZ\"], UserContext=%llx, UserContext2=%llx: "
"error: the user-mode file system handle will be leaked!",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName,
UserContext, UserContext2);
#endif
exit:;
}
VOID FspFsvolCreateRequestFini(PVOID Context[3])
{
PAGED_CODE();
if (0 != Context[RequestFsContext])
FspFileContextRelease(Context[RequestFsContext]);
if (0 != Context[RequestAccessToken])
{
#if DBG
NTSTATUS Result0;
Result0 = ObCloseHandle(Context[RequestAccessToken], KernelMode);
if (!NT_SUCCESS(Result0))
DEBUGLOG("ObCloseHandle() = %s", NtStatusSym(Result0));
#else
ObCloseHandle(Context[RequestAccessToken], KernelMode);
#endif
}
}
NTSTATUS FspCreate(
@ -733,8 +81,6 @@ NTSTATUS FspCreate(
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_CREATE == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:

1
src/sys/debug.c
View File

@ -166,7 +166,6 @@ const char *IoctlCodeSym(ULONG ControlCode)
switch (ControlCode)
{
SYM(FSP_FSCTL_CREATE)
SYM(FSP_FSCTL_DELETE)
SYM(FSP_FSCTL_TRANSACT)
SYM(FSP_FSCTL_WORK)
default:

22
src/sys/devctl.c
View File

@ -8,13 +8,13 @@
static NTSTATUS FspFsvolDeviceControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolDeviceControlComplete;
FSP_DRIVER_DISPATCH FspDeviceControl;
FSP_IOCMPL_DISPATCH FspDeviceControlComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolDeviceControl)
#pragma alloc_text(PAGE, FspFsvolDeviceControlComplete)
#pragma alloc_text(PAGE, FspDeviceControl)
#pragma alloc_text(PAGE, FspDeviceControlComplete)
#endif
static NTSTATUS FspFsvolDeviceControl(
@ -25,13 +25,19 @@ static NTSTATUS FspFsvolDeviceControl(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolDeviceControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspDeviceControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_DEVICE_CONTROL == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -42,11 +48,3 @@ NTSTATUS FspDeviceControl(
FSP_LEAVE_MJ("%s", "");
}
VOID FspDeviceControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

440
src/sys/device.c
View File

@ -15,29 +15,21 @@ NTSTATUS FspDeviceCreate(UINT32 Kind, ULONG ExtraSize,
PDEVICE_OBJECT *PDeviceObject);
VOID FspDeviceInitComplete(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceDelete(PDEVICE_OBJECT DeviceObject);
static NTSTATUS FspFsctlDeviceInit(PDEVICE_OBJECT DeviceObject);
static VOID FspFsctlDeviceInitComplete(PDEVICE_OBJECT DeviceObject);
static VOID FspFsctlDeviceFini(PDEVICE_OBJECT DeviceObject);
static NTSTATUS FspFsvrtDeviceInit(PDEVICE_OBJECT DeviceObject);
static VOID FspFsvrtDeviceInitComplete(PDEVICE_OBJECT DeviceObject);
static VOID FspFsvrtDeviceFini(PDEVICE_OBJECT DeviceObject);
BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject);
PVOID FspDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
PVOID FspDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
FSP_DEVICE_GENERIC_TABLE_ELEMENT *ElementStorage, PBOOLEAN PInserted);
VOID FspDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
PBOOLEAN PDeleted);
static RTL_AVL_COMPARE_ROUTINE FspDeviceCompareElement;
static RTL_AVL_ALLOCATE_ROUTINE FspDeviceAllocateElement;
static RTL_AVL_FREE_ROUTINE FspDeviceFreeElement;
static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject);
static VOID FspFsvolDeviceInitComplete(PDEVICE_OBJECT DeviceObject);
static VOID FspFsvolDeviceFini(PDEVICE_OBJECT DeviceObject);
BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeCreated(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject);
static IO_TIMER_ROUTINE FspFsvrtDeviceTimerRoutine;
static WORKER_THREAD_ROUTINE FspFsvrtDeviceExpirationRoutine;
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
FSP_DEVICE_GENERIC_TABLE_ELEMENT *ElementStorage, PBOOLEAN PInserted);
VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
PBOOLEAN PDeleted);
static RTL_AVL_COMPARE_ROUTINE FspFsvolDeviceCompareElement;
static RTL_AVL_ALLOCATE_ROUTINE FspFsvolDeviceAllocateElement;
static RTL_AVL_FREE_ROUTINE FspFsvolDeviceFreeElement;
static IO_TIMER_ROUTINE FspFsvolDeviceTimerRoutine;
static WORKER_THREAD_ROUTINE FspFsvolDeviceExpirationRoutine;
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount);
VOID FspDeviceDeleteList(
@ -49,23 +41,15 @@ VOID FspDeviceDeleteAll(VOID);
#pragma alloc_text(PAGE, FspDeviceCreate)
#pragma alloc_text(PAGE, FspDeviceInitComplete)
#pragma alloc_text(PAGE, FspDeviceDelete)
#pragma alloc_text(PAGE, FspFsctlDeviceInit)
#pragma alloc_text(PAGE, FspFsctlDeviceInitComplete)
#pragma alloc_text(PAGE, FspFsctlDeviceFini)
#pragma alloc_text(PAGE, FspFsvrtDeviceInit)
#pragma alloc_text(PAGE, FspFsvrtDeviceInitComplete)
#pragma alloc_text(PAGE, FspFsvrtDeviceFini)
#pragma alloc_text(PAGE, FspDeviceLookupContext)
#pragma alloc_text(PAGE, FspDeviceInsertContext)
#pragma alloc_text(PAGE, FspDeviceDeleteContext)
#pragma alloc_text(PAGE, FspDeviceCompareElement)
#pragma alloc_text(PAGE, FspDeviceAllocateElement)
#pragma alloc_text(PAGE, FspDeviceFreeElement)
#pragma alloc_text(PAGE, FspFsvolDeviceInit)
#pragma alloc_text(PAGE, FspFsvolDeviceInitComplete)
#pragma alloc_text(PAGE, FspFsvolDeviceFini)
#pragma alloc_text(PAGE, FspFsctlDeviceVolumeCreated)
#pragma alloc_text(PAGE, FspFsctlDeviceVolumeDeleted)
#pragma alloc_text(PAGE, FspFsvolDeviceLookupContext)
#pragma alloc_text(PAGE, FspFsvolDeviceInsertContext)
#pragma alloc_text(PAGE, FspFsvolDeviceDeleteContext)
#pragma alloc_text(PAGE, FspFsvolDeviceCompareElement)
#pragma alloc_text(PAGE, FspFsvolDeviceAllocateElement)
#pragma alloc_text(PAGE, FspFsvolDeviceFreeElement)
#pragma alloc_text(PAGE, FspDeviceCopyList)
#pragma alloc_text(PAGE, FspDeviceDeleteList)
#pragma alloc_text(PAGE, FspDeviceDeleteAll)
@ -89,10 +73,10 @@ NTSTATUS FspDeviceCreateSecure(UINT32 Kind, ULONG ExtraSize,
DeviceExtensionSize = sizeof(FSP_FSVOL_DEVICE_EXTENSION);
break;
case FspFsvrtDeviceExtensionKind:
DeviceExtensionSize = sizeof(FSP_FSVRT_DEVICE_EXTENSION);
DeviceExtensionSize = 0;
break;
case FspFsctlDeviceExtensionKind:
DeviceExtensionSize = sizeof(FSP_FSCTL_DEVICE_EXTENSION);
DeviceExtensionSize = 0;
break;
default:
ASSERT(0);
@ -117,6 +101,8 @@ NTSTATUS FspDeviceCreateSecure(UINT32 Kind, ULONG ExtraSize,
KeInitializeSpinLock(&DeviceExtension->SpinLock);
DeviceExtension->RefCount = 1;
ExInitializeResourceLite(&DeviceExtension->Resource);
RtlInitializeGenericTableAvl(&DeviceExtension->GenericTable,
FspDeviceCompareElement, FspDeviceAllocateElement, FspDeviceFreeElement, 0);
DeviceExtension->Kind = Kind;
switch (Kind)
@ -125,15 +111,24 @@ NTSTATUS FspDeviceCreateSecure(UINT32 Kind, ULONG ExtraSize,
Result = FspFsvolDeviceInit(DeviceObject);
break;
case FspFsvrtDeviceExtensionKind:
Result = FspFsvrtDeviceInit(DeviceObject);
break;
case FspFsctlDeviceExtensionKind:
Result = FspFsctlDeviceInit(DeviceObject);
break;
}
if (!NT_SUCCESS(Result))
{
#if 0
/* FspDeviceFreeElement is now a no-op, so this is no longer necessary */
/*
* Enumerate and delete all entries in the GenericTable.
* There is no need to protect accesses to the table as we are in the device destructor.
*/
FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA *Element;
while (0 != (Element = RtlGetElementGenericTableAvl(&DeviceExtension->GenericTable, 0)))
RtlDeleteElementGenericTableAvl(&DeviceExtension->GenericTable, &Element->Identifier);
#endif
ExDeleteResourceLite(&DeviceExtension->Resource);
IoDeleteDevice(DeviceObject);
}
@ -164,10 +159,8 @@ VOID FspDeviceInitComplete(PDEVICE_OBJECT DeviceObject)
FspFsvolDeviceInitComplete(DeviceObject);
break;
case FspFsvrtDeviceExtensionKind:
FspFsvrtDeviceInitComplete(DeviceObject);
break;
case FspFsctlDeviceExtensionKind:
FspFsctlDeviceInitComplete(DeviceObject);
break;
default:
ASSERT(0);
@ -189,128 +182,27 @@ VOID FspDeviceDelete(PDEVICE_OBJECT DeviceObject)
FspFsvolDeviceFini(DeviceObject);
break;
case FspFsvrtDeviceExtensionKind:
FspFsvrtDeviceFini(DeviceObject);
break;
case FspFsctlDeviceExtensionKind:
FspFsctlDeviceFini(DeviceObject);
break;
default:
ASSERT(0);
return;
}
ExDeleteResourceLite(&DeviceExtension->Resource);
IoDeleteDevice(DeviceObject);
}
static NTSTATUS FspFsctlDeviceInit(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
return STATUS_SUCCESS;
}
static VOID FspFsctlDeviceInitComplete(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
}
static VOID FspFsctlDeviceFini(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
}
static NTSTATUS FspFsvrtDeviceInit(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
NTSTATUS Result;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(DeviceObject);
/* initialize our timer routine */
Result = IoInitializeTimer(DeviceObject, FspFsvrtDeviceTimerRoutine, 0);
if (!NT_SUCCESS(Result))
return Result;
FspIoqInitialize(&FsvrtDeviceExtension->Ioq);
KeInitializeSpinLock(&FsvrtDeviceExtension->ExpirationLock);
ExInitializeWorkItem(&FsvrtDeviceExtension->ExpirationWorkItem,
FspFsvrtDeviceExpirationRoutine, DeviceObject);
FsvrtDeviceExtension->SwapVpb = FspAllocNonPagedExternal(sizeof *FsvrtDeviceExtension->SwapVpb);
if (0 == FsvrtDeviceExtension->SwapVpb)
return STATUS_INSUFFICIENT_RESOURCES;
RtlZeroMemory(FsvrtDeviceExtension->SwapVpb, sizeof *FsvrtDeviceExtension->SwapVpb);
return STATUS_SUCCESS;
}
static VOID FspFsvrtDeviceInitComplete(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
IoStartTimer(DeviceObject);
}
static VOID FspFsvrtDeviceFini(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(DeviceObject);
/*
* First things first: stop our timer.
*
* Our IoTimer routine will NOT be called again after IoStopTimer() returns.
* However a work item may be in flight. For this reason our IoTimer routine
* does an ObReferenceObject() on our DeviceObject before queueing work items.
*/
IoStopTimer(DeviceObject);
if (0 != FsvrtDeviceExtension->SwapVpb)
FspFreeExternal(FsvrtDeviceExtension->SwapVpb);
}
static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
RtlInitializeGenericTableAvl(&FsvolDeviceExtension->GenericTable,
FspFsvolDeviceCompareElement, FspFsvolDeviceAllocateElement, FspFsvolDeviceFreeElement, 0);
return STATUS_SUCCESS;
}
static VOID FspFsvolDeviceInitComplete(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
}
static VOID FspFsvolDeviceFini(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
#if 0
/* FspFsvolDeviceFreeElement is now a no-op, so this is no longer necessary */
/* FspDeviceFreeElement is now a no-op, so this is no longer necessary */
/*
* Enumerate and delete all entries in the GenericTable.
* There is no need to protect accesses to the table as we are in the device destructor.
*/
FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA *Element;
while (0 != (Element = RtlGetElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, 0)))
RtlDeleteElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, &Element->Identifier);
while (0 != (Element = RtlGetElementGenericTableAvl(&DeviceExtension->GenericTable, 0)))
RtlDeleteElementGenericTableAvl(&DeviceExtension->GenericTable, &Element->Identifier);
#endif
/*
* Dereference the virtual volume device so that it can now go away.
*/
if (0 != FsvolDeviceExtension->FsvrtDeviceObject)
ObDereferenceObject(FsvolDeviceExtension->FsvrtDeviceObject);
ExDeleteResourceLite(&DeviceExtension->Resource);
IoDeleteDevice(DeviceObject);
}
BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject)
@ -352,144 +244,60 @@ VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject)
FspDeviceDelete(DeviceObject);
}
VOID FspFsctlDeviceVolumeCreated(PDEVICE_OBJECT DeviceObject)
PVOID FspDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier)
{
PAGED_CODE();
ASSERT(FspFsctlDeviceExtensionKind == FspDeviceExtension(DeviceObject)->Kind);
ASSERT(ExIsResourceAcquiredExclusiveLite(&FspDeviceExtension(DeviceObject)->Resource));
#if 1
FspFsctlDeviceExtension(DeviceObject)->FsvrtDeviceObjectCount++;
#else
ULONG FsvrtDeviceObjectCount = FspFsctlDeviceExtension(DeviceObject)->FsvrtDeviceObjectCount++;
if (0 == FsvrtDeviceObjectCount)
IoRegisterFileSystem(DeviceObject);
#endif
}
VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
ASSERT(FspFsctlDeviceExtensionKind == FspDeviceExtension(DeviceObject)->Kind);
ASSERT(ExIsResourceAcquiredExclusiveLite(&FspDeviceExtension(DeviceObject)->Resource));
#if 1
--FspFsctlDeviceExtension(DeviceObject)->FsvrtDeviceObjectCount;
#else
ULONG FsvrtDeviceObjectCount = --FspFsctlDeviceExtension(DeviceObject)->FsvrtDeviceObjectCount;
if (0 == FsvrtDeviceObjectCount)
IoUnregisterFileSystem(DeviceObject);
#endif
}
static VOID FspFsvrtDeviceTimerRoutine(PDEVICE_OBJECT DeviceObject, PVOID Context)
{
// !PAGED_CODE();
/*
* This routine runs at DPC level. Reference our DeviceObject and queue a work item
* so that we can do our processing at Passive level. Only do so if the work item
* is not already in flight (otherwise we could requeue the same work item).
*/
ASSERT(KeGetCurrentIrql() == DISPATCH_LEVEL);
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(DeviceObject);
KeAcquireSpinLockAtDpcLevel(&FsvrtDeviceExtension->ExpirationLock);
if (!FsvrtDeviceExtension->ExpirationInProgress)
{
FsvrtDeviceExtension->ExpirationInProgress = TRUE;
ObReferenceObject(DeviceObject);
ExQueueWorkItem(&FsvrtDeviceExtension->ExpirationWorkItem, DelayedWorkQueue);
}
KeReleaseSpinLockFromDpcLevel(&FsvrtDeviceExtension->ExpirationLock);
}
static VOID FspFsvrtDeviceExpirationRoutine(PVOID Context)
{
// !PAGED_CODE();
PDEVICE_OBJECT DeviceObject = Context;
if (FspDeviceRetain(DeviceObject))
try
{
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(DeviceObject);
LARGE_INTEGER Timeout;
KIRQL Irql;
Timeout.QuadPart = FsvrtDeviceExtension->VolumeParams.IrpTimeout * 10000;
/* convert millis to nanos */
FspIoqRemoveExpired(&FsvrtDeviceExtension->Ioq, &Timeout);
KeAcquireSpinLock(&FsvrtDeviceExtension->ExpirationLock, &Irql);
FsvrtDeviceExtension->ExpirationInProgress = FALSE;
KeReleaseSpinLock(&FsvrtDeviceExtension->ExpirationLock, Irql);
}
finally
{
FspDeviceRelease(DeviceObject);
}
ObDereferenceObject(DeviceObject);
}
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(FspFsvolDeviceExtensionKind == FsvolDeviceExtension->Base.Kind);
ASSERT(ExIsResourceAcquiredExclusiveLite(&FsvolDeviceExtension->Base.Resource));
FSP_DEVICE_EXTENSION *DeviceExtension = FspDeviceExtension(DeviceObject);
ASSERT(ExIsResourceAcquiredExclusiveLite(&DeviceExtension->Resource));
FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA *Result;
Result = RtlLookupElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, &Identifier);
Result = RtlLookupElementGenericTableAvl(&DeviceExtension->GenericTable, &Identifier);
return 0 != Result ? Result->Context : 0;
}
PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
PVOID FspDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
FSP_DEVICE_GENERIC_TABLE_ELEMENT *ElementStorage, PBOOLEAN PInserted)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(FspFsvolDeviceExtensionKind == FsvolDeviceExtension->Base.Kind);
ASSERT(ExIsResourceAcquiredExclusiveLite(&FsvolDeviceExtension->Base.Resource));
FSP_DEVICE_EXTENSION *DeviceExtension = FspDeviceExtension(DeviceObject);
ASSERT(ExIsResourceAcquiredExclusiveLite(&DeviceExtension->Resource));
ASSERT(0 != ElementStorage);
FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA *Result, Element = { 0 };
Element.Identifier = Identifier;
Element.Context = Context;
FsvolDeviceExtension->GenericTableElementStorage = ElementStorage;
Result = RtlInsertElementGenericTableAvl(&FsvolDeviceExtension->GenericTable,
DeviceExtension->GenericTableElementStorage = ElementStorage;
Result = RtlInsertElementGenericTableAvl(&DeviceExtension->GenericTable,
&Element, sizeof Element, PInserted);
FsvolDeviceExtension->GenericTableElementStorage = 0;
DeviceExtension->GenericTableElementStorage = 0;
return 0 != Result ? Result->Context : 0;
ASSERT(0 != Result);
return Result->Context;
}
VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
VOID FspDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
PBOOLEAN PDeleted)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(FspFsvolDeviceExtensionKind == FsvolDeviceExtension->Base.Kind);
ASSERT(ExIsResourceAcquiredExclusiveLite(&FsvolDeviceExtension->Base.Resource));
FSP_DEVICE_EXTENSION *DeviceExtension = FspDeviceExtension(DeviceObject);
ASSERT(ExIsResourceAcquiredExclusiveLite(&DeviceExtension->Resource));
BOOLEAN Deleted;
Deleted = RtlDeleteElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, &Identifier);
Deleted = RtlDeleteElementGenericTableAvl(&DeviceExtension->GenericTable, &Identifier);
if (0 != PDeleted)
*PDeleted = Deleted;
}
static RTL_GENERIC_COMPARE_RESULTS NTAPI FspFsvolDeviceCompareElement(
static RTL_GENERIC_COMPARE_RESULTS NTAPI FspDeviceCompareElement(
PRTL_AVL_TABLE Table, PVOID FirstElement, PVOID SecondElement)
{
PAGED_CODE();
@ -503,25 +311,149 @@ static RTL_GENERIC_COMPARE_RESULTS NTAPI FspFsvolDeviceCompareElement(
return GenericEqual;
}
static PVOID NTAPI FspFsvolDeviceAllocateElement(
static PVOID NTAPI FspDeviceAllocateElement(
PRTL_AVL_TABLE Table, CLONG ByteSize)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension =
CONTAINING_RECORD(Table, FSP_FSVOL_DEVICE_EXTENSION, GenericTable);
FSP_DEVICE_EXTENSION *DeviceExtension =
CONTAINING_RECORD(Table, FSP_DEVICE_EXTENSION, GenericTable);
ASSERT(sizeof(FSP_DEVICE_GENERIC_TABLE_ELEMENT) == ByteSize);
return FsvolDeviceExtension->GenericTableElementStorage;
return DeviceExtension->GenericTableElementStorage;
}
static VOID NTAPI FspFsvolDeviceFreeElement(
static VOID NTAPI FspDeviceFreeElement(
PRTL_AVL_TABLE Table, PVOID Buffer)
{
PAGED_CODE();
}
static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
/* allocate a spare VPB in case we are mounted on an fsvrt */
if (FILE_DEVICE_DISK_FILE_SYSTEM == DeviceObject->DeviceType)
{
FsvolDeviceExtension->SwapVpb = FspAllocNonPagedExternal(sizeof *FsvolDeviceExtension->SwapVpb);
if (0 == FsvolDeviceExtension->SwapVpb)
return STATUS_INSUFFICIENT_RESOURCES;
RtlZeroMemory(FsvolDeviceExtension->SwapVpb, sizeof *FsvolDeviceExtension->SwapVpb);
}
/* setup our Ioq and expiration fields */
FspIoqInitialize(&FsvolDeviceExtension->Ioq, FspIopCompleteCanceledIrp);
KeInitializeSpinLock(&FsvolDeviceExtension->ExpirationLock);
ExInitializeWorkItem(&FsvolDeviceExtension->ExpirationWorkItem,
FspFsvolDeviceExpirationRoutine, DeviceObject);
/* initialize our timer routine */
Result = IoInitializeTimer(DeviceObject, FspFsvolDeviceTimerRoutine, 0);
if (!NT_SUCCESS(Result))
return Result;
return STATUS_SUCCESS;
}
static VOID FspFsvolDeviceInitComplete(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
/*
* Reference the virtual volume device so that it will not go away while we are using it.
*/
if (0 != FsvolDeviceExtension->FsvrtDeviceObject)
ObReferenceObject(FsvolDeviceExtension->FsvrtDeviceObject);
/* start our expiration timer */
IoStartTimer(DeviceObject);
}
static VOID FspFsvolDeviceFini(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
/*
* First things first: stop our timer.
*
* Our IoTimer routine will NOT be called again after IoStopTimer() returns.
* However a work item may be in flight. For this reason our IoTimer routine
* does an ObReferenceObject() on our DeviceObject before queueing work items.
*/
IoStopTimer(DeviceObject);
/*
* Dereference the virtual volume device so that it can now go away.
*/
if (0 != FsvolDeviceExtension->FsvrtDeviceObject)
ObDereferenceObject(FsvolDeviceExtension->FsvrtDeviceObject);
/* free the spare VPB if we still have it */
if (0 != FsvolDeviceExtension->SwapVpb)
FspFreeExternal(FsvolDeviceExtension->SwapVpb);
}
static VOID FspFsvolDeviceTimerRoutine(PDEVICE_OBJECT DeviceObject, PVOID Context)
{
// !PAGED_CODE();
/*
* This routine runs at DPC level. Reference our DeviceObject and queue a work item
* so that we can do our processing at Passive level. Only do so if the work item
* is not already in flight (otherwise we could requeue the same work item).
*/
ASSERT(KeGetCurrentIrql() == DISPATCH_LEVEL);
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
KeAcquireSpinLockAtDpcLevel(&FsvolDeviceExtension->ExpirationLock);
if (!FsvolDeviceExtension->ExpirationInProgress)
{
FsvolDeviceExtension->ExpirationInProgress = TRUE;
ObReferenceObject(DeviceObject);
ExQueueWorkItem(&FsvolDeviceExtension->ExpirationWorkItem, DelayedWorkQueue);
}
KeReleaseSpinLockFromDpcLevel(&FsvolDeviceExtension->ExpirationLock);
}
static VOID FspFsvolDeviceExpirationRoutine(PVOID Context)
{
// !PAGED_CODE();
PDEVICE_OBJECT DeviceObject = Context;
if (FspDeviceRetain(DeviceObject))
try
{
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
LARGE_INTEGER Timeout;
KIRQL Irql;
Timeout.QuadPart = FsvolDeviceExtension->VolumeParams.IrpTimeout * 10000;
/* convert millis to nanos */
FspIoqRemoveExpired(&FsvolDeviceExtension->Ioq, &Timeout);
KeAcquireSpinLock(&FsvolDeviceExtension->ExpirationLock, &Irql);
FsvolDeviceExtension->ExpirationInProgress = FALSE;
KeReleaseSpinLock(&FsvolDeviceExtension->ExpirationLock, Irql);
}
finally
{
FspDeviceRelease(DeviceObject);
}
ObDereferenceObject(DeviceObject);
}
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount)
{

22
src/sys/dirctl.c
View File

@ -8,13 +8,13 @@
static NTSTATUS FspFsvolDirectoryControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolDirectoryControlComplete;
FSP_DRIVER_DISPATCH FspDirectoryControl;
FSP_IOCMPL_DISPATCH FspDirectoryControlComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolDirectoryControl)
#pragma alloc_text(PAGE, FspFsvolDirectoryControlComplete)
#pragma alloc_text(PAGE, FspDirectoryControl)
#pragma alloc_text(PAGE, FspDirectoryControlComplete)
#endif
static NTSTATUS FspFsvolDirectoryControl(
@ -25,13 +25,19 @@ static NTSTATUS FspFsvolDirectoryControl(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolDirectoryControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspDirectoryControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_DIRECTORY_CONTROL == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -42,11 +48,3 @@ NTSTATUS FspDirectoryControl(
FSP_LEAVE_MJ("%s", "");
}
VOID FspDirectoryControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

49
src/sys/driver.c
View File

@ -58,7 +58,6 @@ NTSTATUS DriverEntry(
DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = FspDirectoryControl;
DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = FspFileSystemControl;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = FspDeviceControl;
DriverObject->MajorFunction[IRP_MJ_INTERNAL_DEVICE_CONTROL] = FspInternalDeviceControl;
DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = FspShutdown;
DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = FspLockControl;
DriverObject->MajorFunction[IRP_MJ_CLEANUP] = FspCleanup;
@ -71,24 +70,23 @@ NTSTATUS DriverEntry(
/* setup the I/O completion functions */
FspIopCompleteFunction[IRP_MJ_CREATE] = FspFsvolCreateComplete;
FspIopCompleteFunction[IRP_MJ_CLOSE] = FspFsvolCloseComplete;
FspIopCompleteFunction[IRP_MJ_READ] = FspReadComplete;
FspIopCompleteFunction[IRP_MJ_WRITE] = FspWriteComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_INFORMATION] = FspQueryInformationComplete;
FspIopCompleteFunction[IRP_MJ_SET_INFORMATION] = FspSetInformationComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_EA] = FspQueryEaComplete;
FspIopCompleteFunction[IRP_MJ_SET_EA] = FspSetEaComplete;
FspIopCompleteFunction[IRP_MJ_FLUSH_BUFFERS] = FspFlushBuffersComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = FspQueryVolumeInformationComplete;
FspIopCompleteFunction[IRP_MJ_SET_VOLUME_INFORMATION] = FspSetVolumeInformationComplete;
FspIopCompleteFunction[IRP_MJ_DIRECTORY_CONTROL] = FspDirectoryControlComplete;
FspIopCompleteFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = FspFileSystemControlComplete;
FspIopCompleteFunction[IRP_MJ_DEVICE_CONTROL] = FspDeviceControlComplete;
FspIopCompleteFunction[IRP_MJ_INTERNAL_DEVICE_CONTROL] = FspFsvolInternalDeviceControlComplete;
FspIopCompleteFunction[IRP_MJ_SHUTDOWN] = FspShutdownComplete;
FspIopCompleteFunction[IRP_MJ_LOCK_CONTROL] = FspLockControlComplete;
FspIopCompleteFunction[IRP_MJ_READ] = FspFsvolReadComplete;
FspIopCompleteFunction[IRP_MJ_WRITE] = FspFsvolWriteComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_INFORMATION] = FspFsvolQueryInformationComplete;
FspIopCompleteFunction[IRP_MJ_SET_INFORMATION] = FspFsvolSetInformationComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_EA] = FspFsvolQueryEaComplete;
FspIopCompleteFunction[IRP_MJ_SET_EA] = FspFsvolSetEaComplete;
FspIopCompleteFunction[IRP_MJ_FLUSH_BUFFERS] = FspFsvolFlushBuffersComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = FspFsvolQueryVolumeInformationComplete;
FspIopCompleteFunction[IRP_MJ_SET_VOLUME_INFORMATION] = FspFsvolSetVolumeInformationComplete;
FspIopCompleteFunction[IRP_MJ_DIRECTORY_CONTROL] = FspFsvolDirectoryControlComplete;
FspIopCompleteFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = FspFsvolFileSystemControlComplete;
FspIopCompleteFunction[IRP_MJ_DEVICE_CONTROL] = FspFsvolDeviceControlComplete;
FspIopCompleteFunction[IRP_MJ_SHUTDOWN] = FspFsvolShutdownComplete;
FspIopCompleteFunction[IRP_MJ_LOCK_CONTROL] = FspFsvolLockControlComplete;
FspIopCompleteFunction[IRP_MJ_CLEANUP] = FspFsvolCleanupComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_SECURITY] = FspQuerySecurityComplete;
FspIopCompleteFunction[IRP_MJ_SET_SECURITY] = FspSetSecurityComplete;
FspIopCompleteFunction[IRP_MJ_QUERY_SECURITY] = FspFsvolQuerySecurityComplete;
FspIopCompleteFunction[IRP_MJ_SET_SECURITY] = FspFsvolSetSecurityComplete;
/* setup fast I/O and resource acquisition */
static FAST_IO_DISPATCH FspFastIoDispatch = { 0 };
@ -124,18 +122,15 @@ NTSTATUS DriverEntry(
DriverObject->FastIoDispatch = &FspFastIoDispatch;
/*
* Register our devices as file systems. We do this here to simplify file system
* registration/unregistration, although this makes our driver unloadable from the
* get go.
* Register our "disk" device as a file system. We do not register our "net" device
* as a file system, but we register with the MUP instead at a later time.
*
* Unfortunately a call to IoRegisterFileSystem(), even if followed by a call to
* IoUnregistreFileSystem(), makes the driver unloadable. We attempted to move
* the register/unregister calls to FspFsctlDeviceVolume{Created,Deleted}, but it
* did not make any difference with regards to making the driver unloadable. Hence
* we stick to the simpler scheme of doing registration here.
* Please note that the call below makes our driver unloadable. In fact the driver
* remains unloadable even if we issue an IoUnregisterFileSystem() call immediately
* after our IoRegisterFileSystem() call! Some system component appears to keep an
* extra reference to our device somewhere.
*/
IoRegisterFileSystem(FspFsctlDiskDeviceObject);
IoRegisterFileSystem(FspFsctlNetDeviceObject);
#pragma prefast(suppress:28175, "We are in DriverEntry: ok to access DriverName")
FSP_LEAVE("DriverName=\"%wZ\", RegistryPath=\"%wZ\"",

257
src/sys/driver.h
View File

@ -13,6 +13,10 @@
#include <wdmsec.h>
#include <winfsp/fsctl.h>
/* disable warnings */
#pragma warning(disable:4100) /* unreferenced formal parameter */
#pragma warning(disable:4200) /* zero-sized array in struct/union */
#define DRIVER_NAME "WinFsp"
/* IoCreateDeviceSecure default SDDL's */
@ -21,6 +25,11 @@
#define FSP_FSVRT_DEVICE_SDDL "D:P(A;;GA;;;SY)(A;;GA;;;BA)(A;;GR;;;WD)"
/* System:GENERIC_ALL, Administrators:GENERIC_ALL, World:GENERIC_READ */
/* misc macros */
#define FSP_ALLOC_INTERNAL_TAG 'IpsF'
#define FSP_ALLOC_EXTERNAL_TAG 'XpsF'
#define FSP_IO_INCREMENT IO_NETWORK_INCREMENT
/* DEBUGLOG */
#if DBG
#define DEBUGLOG(fmt, ...) \
@ -111,15 +120,12 @@
if (0 == (IrpSp->Control & SL_PENDING_RETURNED))\
{ \
/* if the IRP has not been marked pending already */\
ASSERT(FspFsvolDeviceExtensionKind == FspDeviceExtension(DeviceObject)->Kind);\
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension =\
FspFsvolDeviceExtension(DeviceObject);\
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =\
FspFsvrtDeviceExtension(FsvolDeviceExtension->FsvrtDeviceObject);\
if (!FspIoqPostIrp(&FsvrtDeviceExtension->Ioq, Irp))\
if (!FspIoqPostIrp(&FsvolDeviceExtension->Ioq, Irp))\
{ \
/* this can only happen if the Ioq was stopped */\
ASSERT(FspIoqStopped(&FsvrtDeviceExtension->Ioq));\
ASSERT(FspIoqStopped(&FsvolDeviceExtension->Ioq));\
FspIopCompleteIrp(Irp, Result = STATUS_CANCELLED);\
} \
} \
@ -166,15 +172,6 @@
goto fsp_leave_label; \
} while (0,0)
/* misc macros */
#define FSP_ALLOC_INTERNAL_TAG 'IpsF'
#define FSP_ALLOC_EXTERNAL_TAG 'XpsF'
#define FSP_IO_INCREMENT IO_NETWORK_INCREMENT
/* disable warnings */
#pragma warning(disable:4100) /* unreferenced formal parameter */
#pragma warning(disable:4200) /* zero-sized array in struct/union */
/* driver major functions */
_Function_class_(DRIVER_DISPATCH)
_IRQL_requires_max_(APC_LEVEL)
@ -189,7 +186,6 @@ _Dispatch_type_(IRP_MJ_DEVICE_CONTROL) FSP_DRIVER_DISPATCH FspDeviceControl;
_Dispatch_type_(IRP_MJ_DIRECTORY_CONTROL) FSP_DRIVER_DISPATCH FspDirectoryControl;
_Dispatch_type_(IRP_MJ_FILE_SYSTEM_CONTROL) FSP_DRIVER_DISPATCH FspFileSystemControl;
_Dispatch_type_(IRP_MJ_FLUSH_BUFFERS) FSP_DRIVER_DISPATCH FspFlushBuffers;
_Dispatch_type_(IRP_MJ_INTERNAL_DEVICE_CONTROL) FSP_DRIVER_DISPATCH FspInternalDeviceControl;
_Dispatch_type_(IRP_MJ_LOCK_CONTROL) FSP_DRIVER_DISPATCH FspLockControl;
_Dispatch_type_(IRP_MJ_QUERY_EA) FSP_DRIVER_DISPATCH FspQueryEa;
_Dispatch_type_(IRP_MJ_QUERY_INFORMATION) FSP_DRIVER_DISPATCH FspQueryInformation;
@ -216,28 +212,25 @@ FSP_IOPREP_DISPATCH FspFsvolCreatePrepare;
FSP_IOCMPL_DISPATCH FspFsvolCleanupComplete;
FSP_IOCMPL_DISPATCH FspFsvolCloseComplete;
FSP_IOCMPL_DISPATCH FspFsvolCreateComplete;
FSP_IOCMPL_DISPATCH FspDeviceControlComplete;
FSP_IOCMPL_DISPATCH FspDirectoryControlComplete;
FSP_IOCMPL_DISPATCH FspFileSystemControlComplete;
FSP_IOCMPL_DISPATCH FspFlushBuffersComplete;
FSP_IOCMPL_DISPATCH FspFsvolInternalDeviceControlComplete;
FSP_IOCMPL_DISPATCH FspLockControlComplete;
FSP_IOCMPL_DISPATCH FspQueryEaComplete;
FSP_IOCMPL_DISPATCH FspQueryInformationComplete;
FSP_IOCMPL_DISPATCH FspQuerySecurityComplete;
FSP_IOCMPL_DISPATCH FspQueryVolumeInformationComplete;
FSP_IOCMPL_DISPATCH FspReadComplete;
FSP_IOCMPL_DISPATCH FspSetEaComplete;
FSP_IOCMPL_DISPATCH FspSetInformationComplete;
FSP_IOCMPL_DISPATCH FspSetSecurityComplete;
FSP_IOCMPL_DISPATCH FspSetVolumeInformationComplete;
FSP_IOCMPL_DISPATCH FspShutdownComplete;
FSP_IOCMPL_DISPATCH FspWriteComplete;
FSP_IOCMPL_DISPATCH FspFsvolDeviceControlComplete;
FSP_IOCMPL_DISPATCH FspFsvolDirectoryControlComplete;
FSP_IOCMPL_DISPATCH FspFsvolFileSystemControlComplete;
FSP_IOCMPL_DISPATCH FspFsvolFlushBuffersComplete;
FSP_IOCMPL_DISPATCH FspFsvolLockControlComplete;
FSP_IOCMPL_DISPATCH FspFsvolQueryEaComplete;
FSP_IOCMPL_DISPATCH FspFsvolQueryInformationComplete;
FSP_IOCMPL_DISPATCH FspFsvolQuerySecurityComplete;
FSP_IOCMPL_DISPATCH FspFsvolQueryVolumeInformationComplete;
FSP_IOCMPL_DISPATCH FspFsvolReadComplete;
FSP_IOCMPL_DISPATCH FspFsvolSetEaComplete;
FSP_IOCMPL_DISPATCH FspFsvolSetInformationComplete;
FSP_IOCMPL_DISPATCH FspFsvolSetSecurityComplete;
FSP_IOCMPL_DISPATCH FspFsvolSetVolumeInformationComplete;
FSP_IOCMPL_DISPATCH FspFsvolShutdownComplete;
FSP_IOCMPL_DISPATCH FspFsvolWriteComplete;
/* fast I/O */
/* fast I/O and resource acquisition */
FAST_IO_CHECK_IF_POSSIBLE FspFastIoCheckIfPossible;
/* resource acquisition */
FAST_IO_ACQUIRE_FILE FspAcquireFileForNtCreateSection;
FAST_IO_RELEASE_FILE FspReleaseFileForNtCreateSection;
FAST_IO_ACQUIRE_FOR_MOD_WRITE FspAcquireForModWrite;
@ -245,6 +238,52 @@ FAST_IO_RELEASE_FOR_MOD_WRITE FspReleaseForModWrite;
FAST_IO_ACQUIRE_FOR_CCFLUSH FspAcquireForCcFlush;
FAST_IO_RELEASE_FOR_CCFLUSH FspReleaseForCcFlush;
/* memory allocation */
static inline
PVOID FspAlloc(SIZE_T Size)
{
return ExAllocatePoolWithTag(PagedPool, Size, FSP_ALLOC_INTERNAL_TAG);
}
static inline
PVOID FspAllocNonPaged(SIZE_T Size)
{
return ExAllocatePoolWithTag(NonPagedPool, Size, FSP_ALLOC_INTERNAL_TAG);
}
static inline
VOID FspFree(PVOID Pointer)
{
ExFreePoolWithTag(Pointer, FSP_ALLOC_INTERNAL_TAG);
}
static inline
PVOID FspAllocExternal(SIZE_T Size)
{
return ExAllocatePoolWithTag(PagedPool, Size, FSP_ALLOC_EXTERNAL_TAG);
}
static inline
PVOID FspAllocNonPagedExternal(SIZE_T Size)
{
return ExAllocatePoolWithTag(NonPagedPool, Size, FSP_ALLOC_EXTERNAL_TAG);
}
static inline
VOID FspFreeExternal(PVOID Pointer)
{
ExFreePool(Pointer);
}
/* utility: GUIDs */
NTSTATUS FspCreateGuid(GUID *Guid);
/* utility: delayed work queue */
typedef struct
{
KTIMER Timer;
KDPC Dpc;
WORK_QUEUE_ITEM WorkQueueItem;
} FSP_WORK_ITEM_WITH_DELAY;
VOID FspInitializeWorkItemWithDelay(FSP_WORK_ITEM_WITH_DELAY *WorkItem,
PWORKER_THREAD_ROUTINE Routine, PVOID Context);
VOID FspQueueWorkItemWithDelay(FSP_WORK_ITEM_WITH_DELAY *WorkItem, LARGE_INTEGER Timeout);
/* IRP context */
#define FspIrpTimestamp(Irp) \
(*(ULONGLONG *)&(Irp)->Tail.Overlay.DriverContext[0])
@ -261,8 +300,9 @@ typedef struct
KEVENT PendingIrpEvent;
LIST_ENTRY PendingIrpList, ProcessIrpList;
IO_CSQ PendingIoCsq, ProcessIoCsq;
VOID (*CompleteCanceledIrp)(PIRP Irp);
} FSP_IOQ;
VOID FspIoqInitialize(FSP_IOQ *Ioq);
VOID FspIoqInitialize(FSP_IOQ *Ioq, VOID (*CompleteCanceledIrp)(PIRP Irp));
VOID FspIoqStop(FSP_IOQ *Ioq);
BOOLEAN FspIoqStopped(FSP_IOQ *Ioq);
VOID FspIoqRemoveExpired(FSP_IOQ *Ioq, PLARGE_INTEGER Timeout);
@ -289,10 +329,21 @@ VOID FspIopCompleteIrp(PIRP Irp, NTSTATUS Result)
{
FspIopCompleteIrpEx(Irp, Result, TRUE);
}
VOID FspIopCompleteCanceledIrp(PIRP Irp);
NTSTATUS FspIopDispatchPrepare(PIRP Irp, FSP_FSCTL_TRANSACT_REQ *Request);
VOID FspIopDispatchComplete(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
/* device management */
typedef struct
{
UINT64 Identifier;
PVOID Context;
} FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA;
typedef struct
{
RTL_BALANCED_LINKS Header;
FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA Data;
} FSP_DEVICE_GENERIC_TABLE_ELEMENT;
enum
{
FspFsctlDeviceExtensionKind = '\0ltC', /* file system control device (e.g. \Device\WinFsp.Disk) */
@ -304,62 +355,32 @@ typedef struct
KSPIN_LOCK SpinLock;
LONG RefCount;
ERESOURCE Resource;
RTL_AVL_TABLE GenericTable;
PVOID GenericTableElementStorage;
UINT32 Kind;
} FSP_DEVICE_EXTENSION;
typedef struct
{
FSP_DEVICE_EXTENSION Base;
ULONG FsvrtDeviceObjectCount;
} FSP_FSCTL_DEVICE_EXTENSION;
typedef struct
{
FSP_DEVICE_EXTENSION Base;
PDEVICE_OBJECT FsctlDeviceObject;
PDEVICE_OBJECT FsvolDeviceObject;
PDEVICE_OBJECT FsvrtDeviceObject;
HANDLE MupHandle;
BOOLEAN DeletePending;
FSP_WORK_ITEM_WITH_DELAY DeleteVolumeWorkItem;
FSP_DEVICE_GENERIC_TABLE_ELEMENT ElementStorage;
FSP_FSCTL_VOLUME_PARAMS VolumeParams;
PVPB SwapVpb;
FSP_IOQ Ioq;
KSPIN_LOCK ExpirationLock;
WORK_QUEUE_ITEM ExpirationWorkItem;
BOOLEAN ExpirationInProgress;
PVPB SwapVpb;
BOOLEAN Deleted;
FSP_FSCTL_DECLSPEC_ALIGN UINT8 SecurityDescriptorBuf[];
} FSP_FSVRT_DEVICE_EXTENSION;
typedef struct
{
FSP_DEVICE_EXTENSION Base;
PDEVICE_OBJECT FsvrtDeviceObject;
RTL_AVL_TABLE GenericTable;
PVOID GenericTableElementStorage;
} FSP_FSVOL_DEVICE_EXTENSION;
typedef struct
{
UINT64 Identifier;
PVOID Context;
} FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA;
typedef struct
{
RTL_BALANCED_LINKS Header;
FSP_DEVICE_GENERIC_TABLE_ELEMENT_DATA Data;
} FSP_DEVICE_GENERIC_TABLE_ELEMENT;
static inline
FSP_DEVICE_EXTENSION *FspDeviceExtension(PDEVICE_OBJECT DeviceObject)
{
return DeviceObject->DeviceExtension;
}
static inline
FSP_FSCTL_DEVICE_EXTENSION *FspFsctlDeviceExtension(PDEVICE_OBJECT DeviceObject)
{
ASSERT(FspFsctlDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
return DeviceObject->DeviceExtension;
}
static inline
FSP_FSVRT_DEVICE_EXTENSION *FspFsvrtDeviceExtension(PDEVICE_OBJECT DeviceObject)
{
ASSERT(FspFsvrtDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
return DeviceObject->DeviceExtension;
}
static inline
FSP_FSVOL_DEVICE_EXTENSION *FspFsvolDeviceExtension(PDEVICE_OBJECT DeviceObject)
{
ASSERT(FspFsvolDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
@ -376,12 +397,10 @@ VOID FspDeviceInitComplete(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceDelete(PDEVICE_OBJECT DeviceObject);
BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeCreated(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject);
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
PVOID FspDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
PVOID FspDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
FSP_DEVICE_GENERIC_TABLE_ELEMENT *ElementStorage, PBOOLEAN PInserted);
VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
VOID FspDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
PBOOLEAN PDeleted);
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount);
@ -389,6 +408,23 @@ VOID FspDeviceDeleteList(
PDEVICE_OBJECT *DeviceObjects, ULONG DeviceObjectCount);
VOID FspDeviceDeleteAll(VOID);
/* debug */
#if DBG
BOOLEAN HasDbgBreakPoint(const char *Function);
const char *NtStatusSym(NTSTATUS Status);
const char *IrpMajorFunctionSym(UCHAR MajorFunction);
const char *IrpMinorFunctionSym(UCHAR MajorFunction, UCHAR MinorFunction);
const char *IoctlCodeSym(ULONG ControlCode);
#endif
/* extern */
extern PDRIVER_OBJECT FspDriverObject;
extern PDEVICE_OBJECT FspFsctlDiskDeviceObject;
extern PDEVICE_OBJECT FspFsctlNetDeviceObject;
extern FSP_IOPREP_DISPATCH *FspIopPrepareFunction[];
extern FSP_IOCMPL_DISPATCH *FspIopCompleteFunction[];
#if 0
/* file objects */
#define FspFileContextKind(FsContext) \
(((FSP_FILE_CONTEXT *)FsContext)->Header.NodeTypeCode)
@ -451,69 +487,6 @@ VOID FspFileContextRelease(FSP_FILE_CONTEXT *Context)
FspFileContextDelete(Context);
}
/* misc */
static inline
PVOID FspAlloc(SIZE_T Size)
{
return ExAllocatePoolWithTag(PagedPool, Size, FSP_ALLOC_INTERNAL_TAG);
}
static inline
PVOID FspAllocNonPaged(SIZE_T Size)
{
return ExAllocatePoolWithTag(NonPagedPool, Size, FSP_ALLOC_INTERNAL_TAG);
}
static inline
VOID FspFree(PVOID Pointer)
{
ExFreePoolWithTag(Pointer, FSP_ALLOC_INTERNAL_TAG);
}
static inline
PVOID FspAllocExternal(SIZE_T Size)
{
return ExAllocatePoolWithTag(PagedPool, Size, FSP_ALLOC_EXTERNAL_TAG);
}
static inline
PVOID FspAllocNonPagedExternal(SIZE_T Size)
{
return ExAllocatePoolWithTag(NonPagedPool, Size, FSP_ALLOC_EXTERNAL_TAG);
}
static inline
VOID FspFreeExternal(PVOID Pointer)
{
ExFreePool(Pointer);
}
NTSTATUS FspCreateGuid(GUID *Guid);
BOOLEAN FspValidRelativeSecurityDescriptor(
PSECURITY_DESCRIPTOR SecurityDescriptor, ULONG SecurityDescriptorLength,
SECURITY_INFORMATION RequiredInformation);
NTSTATUS FspSecuritySubjectContextAccessCheck(
PSECURITY_DESCRIPTOR SecurityDescriptor, ACCESS_MASK DesiredAccess, KPROCESSOR_MODE AccessMode);
/* delayed work queue */
typedef struct
{
KTIMER Timer;
KDPC Dpc;
WORK_QUEUE_ITEM WorkQueueItem;
} FSP_WORK_ITEM_WITH_DELAY;
VOID FspInitializeWorkItemWithDelay(FSP_WORK_ITEM_WITH_DELAY *WorkItem,
PWORKER_THREAD_ROUTINE Routine, PVOID Context);
VOID FspQueueWorkItemWithDelay(FSP_WORK_ITEM_WITH_DELAY *WorkItem, LARGE_INTEGER Timeout);
/* debug */
#if DBG
BOOLEAN HasDbgBreakPoint(const char *Function);
const char *NtStatusSym(NTSTATUS Status);
const char *IrpMajorFunctionSym(UCHAR MajorFunction);
const char *IrpMinorFunctionSym(UCHAR MajorFunction, UCHAR MinorFunction);
const char *IoctlCodeSym(ULONG ControlCode);
#endif
/* extern */
extern PDRIVER_OBJECT FspDriverObject;
extern PDEVICE_OBJECT FspFsctlDiskDeviceObject;
extern PDEVICE_OBJECT FspFsctlNetDeviceObject;
extern FSP_IOPREP_DISPATCH *FspIopPrepareFunction[];
extern FSP_IOCMPL_DISPATCH *FspIopCompleteFunction[];
#endif

44
src/sys/ea.c
View File

@ -8,20 +8,20 @@
static NTSTATUS FspFsvolQueryEa(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolQueryEaComplete;
static NTSTATUS FspFsvolSetEa(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolSetEaComplete;
FSP_DRIVER_DISPATCH FspQueryEa;
FSP_DRIVER_DISPATCH FspSetEa;
FSP_IOCMPL_DISPATCH FspQueryEaComplete;
FSP_IOCMPL_DISPATCH FspSetEaComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolQueryEa)
#pragma alloc_text(PAGE, FspFsvolQueryEaComplete)
#pragma alloc_text(PAGE, FspFsvolSetEa)
#pragma alloc_text(PAGE, FspFsvolSetEaComplete)
#pragma alloc_text(PAGE, FspQueryEa)
#pragma alloc_text(PAGE, FspSetEa)
#pragma alloc_text(PAGE, FspQueryEaComplete)
#pragma alloc_text(PAGE, FspSetEaComplete)
#endif
static NTSTATUS FspFsvolQueryEa(
@ -32,6 +32,14 @@ static NTSTATUS FspFsvolQueryEa(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolQueryEaComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
static NTSTATUS FspFsvolSetEa(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
@ -40,13 +48,19 @@ static NTSTATUS FspFsvolSetEa(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolSetEaComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspQueryEa(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_QUERY_EA == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -63,8 +77,6 @@ NTSTATUS FspSetEa(
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_SET_EA == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -75,19 +87,3 @@ NTSTATUS FspSetEa(
FSP_LEAVE_MJ("%s", "");
}
VOID FspQueryEaComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
VOID FspSetEaComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

75
src/sys/fastio.c
View File

@ -7,9 +7,21 @@
#include <sys/driver.h>
FAST_IO_CHECK_IF_POSSIBLE FspFastIoCheckIfPossible;
FAST_IO_ACQUIRE_FILE FspAcquireFileForNtCreateSection;
FAST_IO_RELEASE_FILE FspReleaseFileForNtCreateSection;
FAST_IO_ACQUIRE_FOR_MOD_WRITE FspAcquireForModWrite;
FAST_IO_RELEASE_FOR_MOD_WRITE FspReleaseForModWrite;
FAST_IO_ACQUIRE_FOR_CCFLUSH FspAcquireForCcFlush;
FAST_IO_RELEASE_FOR_CCFLUSH FspReleaseForCcFlush;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFastIoCheckIfPossible)
#pragma alloc_text(PAGE, FspAcquireFileForNtCreateSection)
#pragma alloc_text(PAGE, FspReleaseFileForNtCreateSection)
#pragma alloc_text(PAGE, FspAcquireForModWrite)
#pragma alloc_text(PAGE, FspReleaseForModWrite)
#pragma alloc_text(PAGE, FspAcquireForCcFlush)
#pragma alloc_text(PAGE, FspReleaseForCcFlush)
#endif
BOOLEAN FspFastIoCheckIfPossible(
@ -28,3 +40,66 @@ BOOLEAN FspFastIoCheckIfPossible(
FSP_LEAVE_BOOL("%s", "");
}
VOID FspAcquireFileForNtCreateSection(
PFILE_OBJECT FileObject)
{
FSP_ENTER_VOID(PAGED_CODE());
FSP_LEAVE_VOID("%s", "");
}
VOID FspReleaseFileForNtCreateSection(
PFILE_OBJECT FileObject)
{
FSP_ENTER_VOID(PAGED_CODE());
FSP_LEAVE_VOID("%s", "");
}
NTSTATUS FspAcquireForModWrite(
PFILE_OBJECT FileObject,
PLARGE_INTEGER EndingOffset,
PERESOURCE *ResourceToRelease,
PDEVICE_OBJECT DeviceObject)
{
FSP_ENTER(PAGED_CODE());
Result = STATUS_NOT_IMPLEMENTED;
FSP_LEAVE("%s", "");
}
NTSTATUS FspReleaseForModWrite(
PFILE_OBJECT FileObject,
PERESOURCE ResourceToRelease,
PDEVICE_OBJECT DeviceObject)
{
FSP_ENTER(PAGED_CODE());
Result = STATUS_NOT_IMPLEMENTED;
FSP_LEAVE("%s", "");
}
NTSTATUS FspAcquireForCcFlush(
PFILE_OBJECT FileObject,
PDEVICE_OBJECT DeviceObject)
{
FSP_ENTER(PAGED_CODE());
Result = STATUS_NOT_IMPLEMENTED;
FSP_LEAVE("%s", "");
}
NTSTATUS FspReleaseForCcFlush(
PFILE_OBJECT FileObject,
PDEVICE_OBJECT DeviceObject)
{
FSP_ENTER(PAGED_CODE());
Result = STATUS_NOT_IMPLEMENTED;
FSP_LEAVE("%s", "");
}

44
src/sys/fileinfo.c
View File

@ -8,20 +8,20 @@
static NTSTATUS FspFsvolQueryInformation(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolQueryInformationComplete;
static NTSTATUS FspFsvolSetInformation(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolSetInformationComplete;
FSP_DRIVER_DISPATCH FspQueryInformation;
FSP_DRIVER_DISPATCH FspSetInformation;
FSP_IOCMPL_DISPATCH FspQueryInformationComplete;
FSP_IOCMPL_DISPATCH FspSetInformationComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolQueryInformation)
#pragma alloc_text(PAGE, FspFsvolQueryInformationComplete)
#pragma alloc_text(PAGE, FspFsvolSetInformation)
#pragma alloc_text(PAGE, FspFsvolSetInformationComplete)
#pragma alloc_text(PAGE, FspQueryInformation)
#pragma alloc_text(PAGE, FspSetInformation)
#pragma alloc_text(PAGE, FspQueryInformationComplete)
#pragma alloc_text(PAGE, FspSetInformationComplete)
#endif
static NTSTATUS FspFsvolQueryInformation(
@ -32,6 +32,14 @@ static NTSTATUS FspFsvolQueryInformation(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolQueryInformationComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
static NTSTATUS FspFsvolSetInformation(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
@ -40,13 +48,19 @@ static NTSTATUS FspFsvolSetInformation(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolSetInformationComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspQueryInformation(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_QUERY_INFORMATION == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -63,8 +77,6 @@ NTSTATUS FspSetInformation(
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_SET_INFORMATION == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -75,19 +87,3 @@ NTSTATUS FspSetInformation(
FSP_LEAVE_MJ("%s", "");
}
VOID FspQueryInformationComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
VOID FspSetInformationComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

22
src/sys/flush.c
View File

@ -8,13 +8,13 @@
static NTSTATUS FspFsvolFlushBuffers(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolFlushBuffersComplete;
FSP_DRIVER_DISPATCH FspFlushBuffers;
FSP_IOCMPL_DISPATCH FspFlushBuffersComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolFlushBuffers)
#pragma alloc_text(PAGE, FspFsvolFlushBuffersComplete)
#pragma alloc_text(PAGE, FspFlushBuffers)
#pragma alloc_text(PAGE, FspFlushBuffersComplete)
#endif
static NTSTATUS FspFsvolFlushBuffers(
@ -25,13 +25,19 @@ static NTSTATUS FspFsvolFlushBuffers(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolFlushBuffersComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspFlushBuffers(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_FLUSH_BUFFERS == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -42,11 +48,3 @@ NTSTATUS FspFlushBuffers(
FSP_LEAVE_MJ("%s", "");
}
VOID FspFlushBuffersComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

572
src/sys/fsctl.c
View File

@ -6,99 +6,64 @@
#include <sys/driver.h>
/*
* Overview
*
* The fsctl module provides the IOCTL interface to interact with the
* user-mode file system. The user-mode file system can use the IOCTL's
* to create new volumes, delete them (while they are live!) and transact
* with them.
*
*
* Volume Creation
*
* The creation of a new volume is performed using an FSP_FSCTL_CREATE
* IOCTL code. Creation is simple: a new device \Device\Volume{GUID} is
* created and its path is returned to the user-mode file system. The
* user-mode file system also passes a security descriptor to associate
* with the new virtual volume device so that only the creating user-mode
* file system can control the new volume.
*
*
* Volume Deletion
*
* Deletion of an existing volume is performed using FSP_FSCTL_DELETE and
* is quite a bit more involved. We must protect against the following two
* eventualities: (1) that the volume is currently in use and cannot simply
* go away, and (2) that a simultaneous mount operation is taking place
* while we are deleting the volume.
*
* To protect against the first eventuality we maintain a reference count
* on all our device extensions. Every time an MJ function is entered,
* the reference count is incremented (FspDeviceRetain). Every time
* an IRP is completed, the reference count is decremented (FspDeviceRelease).
* When the reference count reaches 0 the device is deleted using
* IoDeleteDevice. This ensures that a device will not go away while an
* IRP is being pending/processed.
*
* To protect against the second eventuality we use the lock (ERESOURCE)
* on the root Fsctl device to wrap volume deletion and attempts from the
* system to mount the same volume. We also mark the virtual volume device
* as Deleted in case we attempt to delete it (FspDeviceRelease) but we
* cannot because it is currently in use.
*
* A sticky point is our use of the Windows VPB. It is not well documented
* how one should handle this structure during forcible dismount. The fastfat
* and cdfs samples use a technique where they keep a spare VPB and they swap
* it with the volume one during forcible dismount. We do something similar.
* The issue is what to do with the old VPB, because we can delete a volume
* that is not currently being used. We check the VPB's ReferenceCount and
* we free the VPB in this case.
*
*
* Volume Transact
*
* The user-mode file system's primary interaction with the kernel-mode driver
* is by using the FSP_FSCTL_TRANSACT IOCTL code. Every virtual volume device
* maintains an FSP_IOQ (refer to ioq.c for more). When an FSP_FSCTL_TRANSACT
* arrives it first processes any responses (FSP_FSCTL_TRANSACT_RSP) that the
* user-mode file system has sent to handle requests sent to it using a prior
* FSP_FSCTL_TRANSACT. It then proceeds to handle any pending IRP requests by
* sending the corresponding requests (FSP_FSCTL_TRANSACT_REQ) to the user-
* mode file system.
*/
static NTSTATUS FspFsctlFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsctlCreateVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsctlMountVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvrtDeleteVolume(
VOID FspFsctlDeleteVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static WORKER_THREAD_ROUTINE FspFsvrtDeleteVolumeDelayed;
static NTSTATUS FspFsvrtTransact(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsctlFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvrtFileSystemControl(
static WORKER_THREAD_ROUTINE FspFsctlDeleteVolumeDelayed;
static NTSTATUS FspFsctlTransact(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolFileSystemControlComplete;
FSP_DRIVER_DISPATCH FspFileSystemControl;
FSP_IOCMPL_DISPATCH FspFileSystemControlComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsctlFileSystemControl)
#pragma alloc_text(PAGE, FspFsctlCreateVolume)
#pragma alloc_text(PAGE, FspFsctlMountVolume)
#pragma alloc_text(PAGE, FspFsvrtDeleteVolume)
#pragma alloc_text(PAGE, FspFsvrtDeleteVolumeDelayed)
#pragma alloc_text(PAGE, FspFsvrtTransact)
#pragma alloc_text(PAGE, FspFsctlFileSystemControl)
#pragma alloc_text(PAGE, FspFsvrtFileSystemControl)
#pragma alloc_text(PAGE, FspFsctlDeleteVolume)
#pragma alloc_text(PAGE, FspFsctlDeleteVolumeDelayed)
#pragma alloc_text(PAGE, FspFsctlTransact)
#pragma alloc_text(PAGE, FspFsvolFileSystemControl)
#pragma alloc_text(PAGE, FspFsvolFileSystemControlComplete)
#pragma alloc_text(PAGE, FspFileSystemControl)
#pragma alloc_text(PAGE, FspFileSystemControlComplete)
#endif
static NTSTATUS FspFsctlFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
switch (IrpSp->MinorFunction)
{
case IRP_MN_USER_FS_REQUEST:
switch (IrpSp->Parameters.FileSystemControl.FsControlCode)
{
case FSP_FSCTL_CREATE:
Result = FspFsctlCreateVolume(DeviceObject, Irp, IrpSp);
break;
case FSP_FSCTL_TRANSACT:
Result = FspFsctlTransact(DeviceObject, Irp, IrpSp);
break;
}
break;
case IRP_MN_MOUNT_VOLUME:
Result = FspFsctlMountVolume(DeviceObject, Irp, IrpSp);
break;
#if 0
case IRP_MN_VERIFY_VOLUME:
break;
#endif
}
return Result;
}
static NTSTATUS FspFsctlCreateVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
@ -108,29 +73,24 @@ static NTSTATUS FspFsctlCreateVolume(
ULONG InputBufferLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
ULONG OutputBufferLength = IrpSp->Parameters.FileSystemControl.OutputBufferLength;
PVOID SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
PSECURITY_DESCRIPTOR SecurityDescriptor =
(PVOID)((PUINT8)SystemBuffer + FSP_FSCTL_VOLUME_PARAMS_SIZE);
DWORD SecurityDescriptorSize = InputBufferLength - FSP_FSCTL_VOLUME_PARAMS_SIZE;
if (FSP_FSCTL_VOLUME_PARAMS_SIZE >= InputBufferLength || 0 == SystemBuffer ||
!FspValidRelativeSecurityDescriptor(SecurityDescriptor, SecurityDescriptorSize,
DACL_SECURITY_INFORMATION))
if (sizeof(FSP_FSCTL_VOLUME_PARAMS) > InputBufferLength || 0 == SystemBuffer)
return STATUS_INVALID_PARAMETER;
if (FSP_FSCTL_CREATE_BUFFER_SIZEMIN > OutputBufferLength)
return STATUS_BUFFER_TOO_SMALL;
NTSTATUS Result;
FSP_FSCTL_VOLUME_PARAMS VolumeParams = *(FSP_FSCTL_VOLUME_PARAMS *)SystemBuffer;
PVOID SecurityDescriptorBuf = 0;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension;
/* check the passed in VolumeParams */
if (FspFsctlIrpTimeoutMinimum > VolumeParams.IrpTimeout ||
VolumeParams.IrpTimeout > FspFsctlIrpTimeoutMaximum)
{
#if DBG
/* allow the debug timeout value on debug builds */
if (FspFsctlIrpTimeoutDebug != VolumeParams.IrpTimeout)
#endif
VolumeParams.IrpTimeout = FspFsctlIrpTimeoutDefault;
}
if (FspFsctlTransactTimeoutMinimum > VolumeParams.TransactTimeout ||
VolumeParams.TransactTimeout > FspFsctlTransactTimeoutMaximum)
VolumeParams.TransactTimeout = FspFsctlTransactTimeoutDefault;
@ -141,14 +101,7 @@ static NTSTATUS FspFsctlCreateVolume(
if (!NT_SUCCESS(Result))
return Result;
/* copy the security descriptor from the system buffer to a temporary one */
SecurityDescriptorBuf = FspAlloc(SecurityDescriptorSize);
if (0 == SecurityDescriptorBuf)
return STATUS_INSUFFICIENT_RESOURCES;
RtlCopyMemory(SecurityDescriptorBuf, SecurityDescriptor, SecurityDescriptorSize);
/* prepare the device name and SDDL */
PDEVICE_OBJECT FsvrtDeviceObject;
UNICODE_STRING DeviceSddl;
UNICODE_STRING DeviceName;
RtlInitUnicodeString(&DeviceSddl, L"" FSP_FSVRT_DEVICE_SDDL);
@ -160,38 +113,81 @@ static NTSTATUS FspFsctlCreateVolume(
Guid.Data4[4], Guid.Data4[5], Guid.Data4[6], Guid.Data4[7]);
ASSERT(NT_SUCCESS(Result));
/* create the virtual volume device */
FSP_FSCTL_DEVICE_EXTENSION *FsctlDeviceExtension = FspFsctlDeviceExtension(DeviceObject);
ExAcquireResourceExclusiveLite(&FsctlDeviceExtension->Base.Resource, TRUE);
FSP_DEVICE_EXTENSION *DeviceExtension = FspDeviceExtension(DeviceObject);
ExAcquireResourceExclusiveLite(&DeviceExtension->Resource, TRUE);
try
{
Result = FspDeviceCreateSecure(FspFsvrtDeviceExtensionKind, SecurityDescriptorSize,
&DeviceName, FILE_DEVICE_VIRTUAL_DISK,
&DeviceSddl, &FspFsvrtDeviceClassGuid,
&FsvrtDeviceObject);
if (NT_SUCCESS(Result))
HANDLE MupHandle = 0;
PDEVICE_OBJECT FsvrtDeviceObject = 0;
PDEVICE_OBJECT FsvolDeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension;
BOOLEAN Inserted;
/* quick check to see if we already have a volume */
FsvolDeviceObject = FspDeviceLookupContext(DeviceObject, (UINT_PTR)IrpSp->FileObject);
if (0 != FsvolDeviceObject)
{
Result = STATUS_ACCESS_DENIED;
goto exit;
}
/* create the volume (and virtual disk) device(s) */
Result = FspDeviceCreate(FspFsvolDeviceExtensionKind, 0,
DeviceObject->DeviceType,
&FsvolDeviceObject);
if (!NT_SUCCESS(Result))
goto exit;
if (FILE_DEVICE_DISK_FILE_SYSTEM == DeviceObject->DeviceType)
{
Result = FspDeviceCreateSecure(FspFsvrtDeviceExtensionKind, 0,
&DeviceName, FILE_DEVICE_VIRTUAL_DISK,
&DeviceSddl, &FspFsvrtDeviceClassGuid,
&FsvrtDeviceObject);
if (!NT_SUCCESS(Result))
{
FspDeviceRelease(FsvolDeviceObject);
goto exit;
}
#pragma prefast(suppress:28175, "We are a filesystem: ok to access SectorSize")
FsvrtDeviceObject->SectorSize = VolumeParams.SectorSize;
FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
FsvrtDeviceExtension->FsctlDeviceObject = DeviceObject;
FsvrtDeviceExtension->VolumeParams = VolumeParams;
RtlCopyMemory(FsvrtDeviceExtension->SecurityDescriptorBuf,
SecurityDescriptorBuf, SecurityDescriptorSize);
FspDeviceInitComplete(FsvrtDeviceObject);
Irp->IoStatus.Information = DeviceName.Length + sizeof(WCHAR);
FspFsctlDeviceVolumeCreated(DeviceObject);
}
#pragma prefast(suppress:28175, "We are a filesystem: ok to access SectorSize")
FsvolDeviceObject->SectorSize = VolumeParams.SectorSize;
FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
FsvolDeviceExtension->FsctlDeviceObject = DeviceObject;
FsvolDeviceExtension->FsvrtDeviceObject = FsvrtDeviceObject;
FsvolDeviceExtension->MupHandle = MupHandle;
FsvolDeviceExtension->VolumeParams = VolumeParams;
if (0 != FsvrtDeviceObject)
FspDeviceInitComplete(FsvrtDeviceObject);
FspDeviceInitComplete(FsvolDeviceObject);
/* do we need to register with MUP? */
if (0 == FsvrtDeviceObject)
{
Result = FsRtlRegisterUncProviderEx(&MupHandle, &DeviceName, FsvolDeviceObject, 0);
if (!NT_SUCCESS(Result))
{
FspDeviceRelease(FsvolDeviceObject);
goto exit;
}
}
/* associate the new volume device with our file object */
FspDeviceInsertContext(DeviceObject, (UINT_PTR)IrpSp->FileObject, FsvolDeviceObject,
&FsvolDeviceExtension->ElementStorage, &Inserted);
ASSERT(Inserted);
Irp->IoStatus.Information = DeviceName.Length + sizeof(WCHAR);
Result = STATUS_SUCCESS;
exit:;
}
finally
{
ExReleaseResourceLite(&FsctlDeviceExtension->Base.Resource);
ExReleaseResourceLite(&DeviceExtension->Resource);
}
/* free the temporary security descriptor */
if (0 != SecurityDescriptorBuf)
FspFree(SecurityDescriptorBuf);
return Result;
}
@ -201,222 +197,182 @@ static NTSTATUS FspFsctlMountVolume(
PAGED_CODE();
NTSTATUS Result;
FSP_FSCTL_DEVICE_EXTENSION *FsctlDeviceExtension = FspFsctlDeviceExtension(DeviceObject);
ExAcquireResourceExclusiveLite(&FsctlDeviceExtension->Base.Resource, TRUE);
FSP_DEVICE_EXTENSION *DeviceExtension = FspDeviceExtension(DeviceObject);
ExAcquireResourceExclusiveLite(&DeviceExtension->Resource, TRUE);
try
{
PDEVICE_OBJECT *DeviceObjects = 0;
ULONG DeviceObjectCount = 0;
PVPB Vpb = IrpSp->Parameters.MountVolume.Vpb;
PDEVICE_OBJECT FsvrtDeviceObject = IrpSp->Parameters.MountVolume.DeviceObject;
PDEVICE_OBJECT FsvolDeviceObject;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =
FspFsvrtDeviceExtension(FsvrtDeviceObject);
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension;
/* check the passed in volume object; it must be one of our own and not marked Deleted */
Result = FspDeviceCopyList(&DeviceObjects, &DeviceObjectCount);
if (NT_SUCCESS(Result))
/* quick check to see if we already have a volume */
FsvolDeviceObject = FspDeviceLookupContext(DeviceObject, (UINT_PTR)IrpSp->FileObject);
if (0 != FsvolDeviceObject)
{
Result = STATUS_UNRECOGNIZED_VOLUME;
for (ULONG i = 0; DeviceObjectCount > i; i++)
if (DeviceObjects[i] == FsvrtDeviceObject)
{
if (FspDeviceRetain(FsvrtDeviceObject))
{
if (!FsvrtDeviceExtension->Deleted &&
FILE_DEVICE_VIRTUAL_DISK == FsvrtDeviceObject->DeviceType)
Result = STATUS_SUCCESS;
else
FspDeviceRelease(FsvrtDeviceObject);
}
break;
}
FspDeviceDeleteList(DeviceObjects, DeviceObjectCount);
}
if (!NT_SUCCESS(Result))
goto exit;
/* create the file system device object */
Result = FspDeviceCreate(FspFsvolDeviceExtensionKind, 0,
DeviceObject->DeviceType,
&FsvolDeviceObject);
if (NT_SUCCESS(Result))
{
/*
* Reference the virtual volume device so that it will not go away while the
* file system device object is alive!
*/
ObReferenceObject(FsvrtDeviceObject);
#pragma prefast(suppress:28175, "We are a filesystem: ok to access SectorSize")
FsvolDeviceObject->SectorSize = FsvrtDeviceExtension->VolumeParams.SectorSize;
FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
FsvolDeviceExtension->FsvrtDeviceObject = FsvrtDeviceObject;
FsvrtDeviceExtension->FsvolDeviceObject = FsvolDeviceObject;
FspDeviceInitComplete(FsvolDeviceObject);
Vpb->DeviceObject = FsvolDeviceObject;
Vpb->SerialNumber = FsvrtDeviceExtension->VolumeParams.SerialNumber;
Irp->IoStatus.Information = 0;
}
FspDeviceRelease(FsvrtDeviceObject);
FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
if (FsvolDeviceExtension->DeletePending ||
FsvolDeviceExtension->FsvrtDeviceObject != FsvrtDeviceObject)
{
Result = STATUS_UNRECOGNIZED_VOLUME;
goto exit;
}
Vpb->DeviceObject = FsvolDeviceObject;
Vpb->SerialNumber = FsvolDeviceExtension->VolumeParams.SerialNumber;
Irp->IoStatus.Information = 0;
Result = STATUS_SUCCESS;
exit:;
}
finally
{
ExReleaseResourceLite(&FsctlDeviceExtension->Base.Resource);
ExReleaseResourceLite(&DeviceExtension->Resource);
}
return Result;
}
typedef struct
{
PDEVICE_OBJECT FsvolDeviceObject;
PVPB OldVpb;
FSP_WORK_ITEM_WITH_DELAY WorkItemWithDelay;
} FSP_FSVRT_DELETE_VOLUME_WORK_ITEM;
static NTSTATUS FspFsvrtDeleteVolume(
VOID FspFsctlDeleteVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
/* performed during IRP_MJ_CLEANUP! */
PAGED_CODE();
NTSTATUS Result;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(DeviceObject);
FSP_FSCTL_DEVICE_EXTENSION *FsctlDeviceExtension =
FspFsctlDeviceExtension(FsvrtDeviceExtension->FsctlDeviceObject);
PDEVICE_OBJECT FsvolDeviceObject = 0;
ExAcquireResourceExclusiveLite(&FsctlDeviceExtension->Base.Resource, TRUE);
FSP_DEVICE_EXTENSION *DeviceExtension = FspDeviceExtension(DeviceObject);
ExAcquireResourceExclusiveLite(&DeviceExtension->Resource, TRUE);
try
{
PDEVICE_OBJECT FsctlDeviceObject = FsvrtDeviceExtension->FsctlDeviceObject;
PDEVICE_OBJECT FsvolDeviceObject = FsvrtDeviceExtension->FsvolDeviceObject;
PVPB OldVpb;
BOOLEAN DeleteVpb = FALSE;
BOOLEAN DeleteDelayed = FALSE;
LARGE_INTEGER DelayTimeout;
FSP_FSVRT_DELETE_VOLUME_WORK_ITEM *WorkItem = 0;
KIRQL Irql;
/* access check */
Result = FspSecuritySubjectContextAccessCheck(
FsvrtDeviceExtension->SecurityDescriptorBuf, FILE_WRITE_DATA, Irp->RequestorMode);
if (!NT_SUCCESS(Result))
goto exit;
/* pre-allocate a work item in case we need it for delayed delete */
WorkItem = FspAllocNonPaged(sizeof *WorkItem);
if (0 == WorkItem)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
/* mark the virtual volume device as deleted */
FsvrtDeviceExtension->Deleted = TRUE;
/* stop the I/O queue */
FspIoqStop(&FsvrtDeviceExtension->Ioq);
/* swap the preallocated VPB */
#pragma prefast(push)
#pragma prefast(disable:28175, "We are a filesystem: ok to access Vpb")
IoAcquireVpbSpinLock(&Irql);
OldVpb = DeviceObject->Vpb;
if (0 != OldVpb && 0 != FsvrtDeviceExtension->SwapVpb)
{
DeviceObject->Vpb = FsvrtDeviceExtension->SwapVpb;
DeviceObject->Vpb->Size = sizeof *DeviceObject->Vpb;
DeviceObject->Vpb->Type = IO_TYPE_VPB;
DeviceObject->Vpb->Flags = FlagOn(OldVpb->Flags, VPB_REMOVE_PENDING);
DeviceObject->Vpb->RealDevice = OldVpb->RealDevice;
DeviceObject->Vpb->RealDevice->Vpb = DeviceObject->Vpb;
FsvrtDeviceExtension->SwapVpb = 0;
DeleteVpb = 0 == OldVpb->ReferenceCount;
DeleteDelayed = !DeleteVpb && 0 != FsvolDeviceObject;
if (DeleteDelayed)
/* keep VPB around for delayed delete */
OldVpb->ReferenceCount++;
}
IoReleaseVpbSpinLock(Irql);
if (DeleteDelayed)
/* keep fsvol around for delayed delete */
FspDeviceRetain(FsvolDeviceObject);
else if (DeleteVpb)
FspFreeExternal(OldVpb);
#pragma prefast(pop)
/* release the file system device and virtual volume objects */
FsvrtDeviceExtension->FsvolDeviceObject = 0;
FsvolDeviceObject = FspDeviceLookupContext(DeviceObject, (UINT_PTR)IrpSp->FileObject);
if (0 != FsvolDeviceObject)
FspDeviceRelease(FsvolDeviceObject);
FspDeviceRelease(DeviceObject);
FspFsctlDeviceVolumeDeleted(FsctlDeviceObject);
/* are we doing delayed delete of VPB and fsvol? */
if (DeleteDelayed)
{
DelayTimeout.QuadPart = 300/*ms*/ * -10000;
WorkItem->FsvolDeviceObject = FsvolDeviceObject;
WorkItem->OldVpb = OldVpb;
FspInitializeWorkItemWithDelay(&WorkItem->WorkItemWithDelay,
FspFsvrtDeleteVolumeDelayed, WorkItem);
FspQueueWorkItemWithDelay(&WorkItem->WorkItemWithDelay, DelayTimeout);
WorkItem = 0;
}
Result = STATUS_SUCCESS;
exit:
if (0 != WorkItem)
FspFree(WorkItem);
FspDeviceDeleteContext(DeviceObject, (UINT_PTR)IrpSp->FileObject, 0);
}
finally
{
ExReleaseResourceLite(&FsctlDeviceExtension->Base.Resource);
ExReleaseResourceLite(&DeviceExtension->Resource);
}
return Result;
if (0 != FsvolDeviceObject)
{
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
/* mark the volume device as pending delete */
FsvolDeviceExtension->DeletePending = TRUE;
/* stop the I/O queue */
FspIoqStop(&FsvolDeviceExtension->Ioq);
/* do we have a virtual disk device or a MUP handle? */
if (0 != FsvolDeviceExtension->FsvrtDeviceObject)
{
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
PVPB OldVpb;
KIRQL Irql;
BOOLEAN DeleteVpb = FALSE;
BOOLEAN DeleteDelayed = FALSE;
LARGE_INTEGER DelayTimeout;
/* swap the virtual disk device VPB with the preallocated one */
#pragma prefast(push)
#pragma prefast(disable:28175, "We are a filesystem: ok to access Vpb")
IoAcquireVpbSpinLock(&Irql);
OldVpb = FsvrtDeviceObject->Vpb;
if (0 != OldVpb)
{
FsvrtDeviceObject->Vpb = FsvolDeviceExtension->SwapVpb;
FsvrtDeviceObject->Vpb->Size = sizeof *FsvrtDeviceObject->Vpb;
FsvrtDeviceObject->Vpb->Type = IO_TYPE_VPB;
FsvrtDeviceObject->Vpb->Flags = FlagOn(OldVpb->Flags, VPB_REMOVE_PENDING);
FsvrtDeviceObject->Vpb->RealDevice = OldVpb->RealDevice;
FsvrtDeviceObject->Vpb->RealDevice->Vpb = FsvrtDeviceObject->Vpb;
DeleteVpb = 0 == OldVpb->ReferenceCount;
DeleteDelayed = !DeleteVpb;
if (DeleteDelayed)
{
/* keep VPB around for delayed delete */
OldVpb->ReferenceCount++;
FsvolDeviceExtension->SwapVpb = OldVpb;
}
else
FsvolDeviceExtension->SwapVpb = 0;
}
IoReleaseVpbSpinLock(Irql);
if (DeleteDelayed)
/* keep volume device object around for delayed delete */
FspDeviceRetain(FsvolDeviceObject);
else if (DeleteVpb)
/* no more references to the old VPB; delete now! */
FspFreeExternal(OldVpb);
#pragma prefast(pop)
/* release the virtual disk and volume device objects */
FspDeviceRelease(FsvrtDeviceObject);
FspDeviceRelease(FsvolDeviceObject);
/* are we doing delayed delete of VPB and volume device object? */
if (DeleteDelayed)
{
DelayTimeout.QuadPart = 300/*ms*/ * -10000;
FspInitializeWorkItemWithDelay(&FsvolDeviceExtension->DeleteVolumeWorkItem,
FspFsctlDeleteVolumeDelayed, FsvolDeviceObject);
FspQueueWorkItemWithDelay(&FsvolDeviceExtension->DeleteVolumeWorkItem, DelayTimeout);
}
}
else if (0 != FsvolDeviceExtension->MupHandle)
{
HANDLE MupHandle = FsvolDeviceExtension->MupHandle;
FsRtlDeregisterUncProvider(MupHandle);
/* release the volume device object */
FspDeviceRelease(FsvolDeviceObject);
}
}
}
static VOID FspFsvrtDeleteVolumeDelayed(PVOID Context)
static VOID FspFsctlDeleteVolumeDelayed(PVOID Context)
{
PAGED_CODE();
FSP_FSVRT_DELETE_VOLUME_WORK_ITEM *WorkItem = Context;
PDEVICE_OBJECT FsvolDeviceObject = Context;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
KIRQL Irql;
BOOLEAN DeleteVpb = FALSE;
LARGE_INTEGER DelayTimeout;
KIRQL Irql;
IoAcquireVpbSpinLock(&Irql);
ASSERT(0 != WorkItem->OldVpb->ReferenceCount);
DeleteVpb = 1 == WorkItem->OldVpb->ReferenceCount;
ASSERT(0 != FsvolDeviceExtension->SwapVpb->ReferenceCount);
DeleteVpb = 1 == FsvolDeviceExtension->SwapVpb->ReferenceCount;
if (DeleteVpb)
WorkItem->OldVpb->ReferenceCount = 0;
FsvolDeviceExtension->SwapVpb->ReferenceCount = 0;
IoReleaseVpbSpinLock(Irql);
if (DeleteVpb)
{
FspFreeExternal(WorkItem->OldVpb);
FspDeviceRelease(WorkItem->FsvolDeviceObject);
FspFree(WorkItem);
FspFreeExternal(FsvolDeviceExtension->SwapVpb);
FsvolDeviceExtension->SwapVpb = 0;
FspDeviceRelease(FsvolDeviceObject);
}
else
{
DelayTimeout.QuadPart = 300/*ms*/ * -10000;
FspQueueWorkItemWithDelay(&WorkItem->WorkItemWithDelay, DelayTimeout);
FspQueueWorkItemWithDelay(&FsvolDeviceExtension->DeleteVolumeWorkItem, DelayTimeout);
}
}
static NTSTATUS FspFsvrtTransact(
static NTSTATUS FspFsctlTransact(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
#if 0
/* check parameters */
ULONG InputBufferLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
ULONG OutputBufferLength = IrpSp->Parameters.FileSystemControl.OutputBufferLength;
@ -518,56 +474,10 @@ static NTSTATUS FspFsvrtTransact(
Irp->IoStatus.Information = (PUINT8)Request - (PUINT8)SystemBuffer;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsctlFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
switch (IrpSp->MinorFunction)
{
case IRP_MN_USER_FS_REQUEST:
switch (IrpSp->Parameters.FileSystemControl.FsControlCode)
{
case FSP_FSCTL_CREATE:
Result = FspFsctlCreateVolume(DeviceObject, Irp, IrpSp);
break;
}
break;
case IRP_MN_MOUNT_VOLUME:
Result = FspFsctlMountVolume(DeviceObject, Irp, IrpSp);
break;
#if 0
case IRP_MN_VERIFY_VOLUME:
break;
#else
return STATUS_INVALID_DEVICE_REQUEST;
#endif
}
return Result;
}
static NTSTATUS FspFsvrtFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
switch (IrpSp->MinorFunction)
{
case IRP_MN_USER_FS_REQUEST:
switch (IrpSp->Parameters.FileSystemControl.FsControlCode)
{
case FSP_FSCTL_DELETE:
Result = FspFsvrtDeleteVolume(DeviceObject, Irp, IrpSp);
break;
case FSP_FSCTL_TRANSACT:
Result = FspFsvrtTransact(DeviceObject, Irp, IrpSp);
break;
}
break;
}
return Result;
}
static NTSTATUS FspFsvolFileSystemControl(
@ -584,19 +494,28 @@ static NTSTATUS FspFsvolFileSystemControl(
return Result;
}
VOID FspFsvolFileSystemControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC(
"FileObject=%p%s%s",
IrpSp->FileObject,
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ? ", " : "",
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ?
IoctlCodeSym(IrpSp->Parameters.FileSystemControl.FsControlCode) : "");
}
NTSTATUS FspFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_FILE_SYSTEM_CONTROL == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
FSP_RETURN(Result = FspFsvolFileSystemControl(DeviceObject, Irp, IrpSp));
case FspFsvrtDeviceExtensionKind:
FSP_RETURN(Result = FspFsvrtFileSystemControl(DeviceObject, Irp, IrpSp));
case FspFsctlDeviceExtensionKind:
FSP_RETURN(Result = FspFsctlFileSystemControl(DeviceObject, Irp, IrpSp));
default:
@ -610,16 +529,3 @@ NTSTATUS FspFileSystemControl(
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ?
IoctlCodeSym(IrpSp->Parameters.FileSystemControl.FsControlCode) : "");
}
VOID FspFileSystemControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC(
"FileObject=%p%s%s",
IrpSp->FileObject,
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ? ", " : "",
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ?
IoctlCodeSym(IrpSp->Parameters.FileSystemControl.FsControlCode) : "");
}

15
src/sys/iop.c
View File

@ -113,10 +113,12 @@ NTSTATUS FspIopPostWorkRequest(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_TRANSACT_R
}
PIO_STACK_LOCATION IrpSp = IoGetNextIrpStackLocation(Irp);
IrpSp->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL;
IrpSp->Parameters.DeviceIoControl.IoControlCode = FSP_FSCTL_WORK;
IrpSp->Parameters.DeviceIoControl.InputBufferLength = Request->Size;
IrpSp->Parameters.DeviceIoControl.Type3InputBuffer = Request;
Irp->RequestorMode = KernelMode;
IrpSp->MajorFunction = IRP_MJ_FILE_SYSTEM_CONTROL;
IrpSp->MinorFunction = IRP_MN_USER_FS_REQUEST;
IrpSp->Parameters.FileSystemControl.FsControlCode = FSP_FSCTL_WORK;
IrpSp->Parameters.FileSystemControl.InputBufferLength = Request->Size;
IrpSp->Parameters.FileSystemControl.Type3InputBuffer = Request;
ASSERT(METHOD_NEITHER == (IrpSp->Parameters.DeviceIoControl.IoControlCode & 3));
@ -170,6 +172,11 @@ VOID FspIopCompleteIrpEx(PIRP Irp, NTSTATUS Result, BOOLEAN DeviceRelease)
FspDeviceRelease(DeviceObject);
}
VOID FspIopCompleteCanceledIrp(PIRP Irp)
{
FspIopCompleteIrpEx(Irp, STATUS_CANCELLED, TRUE);
}
NTSTATUS FspIopDispatchPrepare(PIRP Irp, FSP_FSCTL_TRANSACT_REQ *Request)
{
PAGED_CODE();

19
src/sys/ioq.c
View File

@ -120,7 +120,8 @@ static VOID FspIoqPendingReleaseLock(PIO_CSQ IoCsq, _IRQL_restores_ KIRQL Irql)
static VOID FspIoqPendingCompleteCanceledIrp(PIO_CSQ IoCsq, PIRP Irp)
{
FspIopCompleteIrp(Irp, STATUS_CANCELLED);
FSP_IOQ *Ioq = CONTAINING_RECORD(IoCsq, FSP_IOQ, PendingIoCsq);
Ioq->CompleteCanceledIrp(Irp);
}
static NTSTATUS FspIoqProcessInsertIrpEx(PIO_CSQ IoCsq, PIRP Irp, PVOID InsertContext)
@ -183,11 +184,14 @@ static VOID FspIoqProcessReleaseLock(PIO_CSQ IoCsq, _IRQL_restores_ KIRQL Irql)
static VOID FspIoqProcessCompleteCanceledIrp(PIO_CSQ IoCsq, PIRP Irp)
{
FspIopCompleteIrp(Irp, STATUS_CANCELLED);
FSP_IOQ *Ioq = CONTAINING_RECORD(IoCsq, FSP_IOQ, ProcessIoCsq);
Ioq->CompleteCanceledIrp(Irp);
}
VOID FspIoqInitialize(FSP_IOQ *Ioq)
VOID FspIoqInitialize(FSP_IOQ *Ioq, VOID (*CompleteCanceledIrp)(PIRP Irp))
{
ASSERT(0 != CompleteCanceledIrp);
RtlZeroMemory(Ioq, sizeof *Ioq);
KeInitializeSpinLock(&Ioq->SpinLock);
KeInitializeEvent(&Ioq->PendingIrpEvent, NotificationEvent, FALSE);
@ -207,6 +211,7 @@ VOID FspIoqInitialize(FSP_IOQ *Ioq)
FspIoqProcessAcquireLock,
FspIoqProcessReleaseLock,
FspIoqProcessCompleteCanceledIrp);
Ioq->CompleteCanceledIrp = CompleteCanceledIrp;
}
VOID FspIoqStop(FSP_IOQ *Ioq)
@ -219,9 +224,9 @@ VOID FspIoqStop(FSP_IOQ *Ioq)
KeReleaseSpinLock(&Ioq->SpinLock, Irql);
PIRP Irp;
while (0 != (Irp = IoCsqRemoveNextIrp(&Ioq->PendingIoCsq, 0)))
FspIoqPendingCompleteCanceledIrp(&Ioq->PendingIoCsq, Irp);
Ioq->CompleteCanceledIrp(Irp);
while (0 != (Irp = IoCsqRemoveNextIrp(&Ioq->ProcessIoCsq, 0)))
FspIoqProcessCompleteCanceledIrp(&Ioq->ProcessIoCsq, Irp);
Ioq->CompleteCanceledIrp(Irp);
}
BOOLEAN FspIoqStopped(FSP_IOQ *Ioq)
@ -245,9 +250,9 @@ VOID FspIoqRemoveExpired(FSP_IOQ *Ioq, PLARGE_INTEGER Timeout)
PeekContext.ExpirationTime = 0;
PIRP Irp;
while (0 != (Irp = IoCsqRemoveNextIrp(&Ioq->PendingIoCsq, &PeekContext)))
FspIoqPendingCompleteCanceledIrp(&Ioq->PendingIoCsq, Irp);
Ioq->CompleteCanceledIrp(Irp);
while (0 != (Irp = IoCsqRemoveNextIrp(&Ioq->ProcessIoCsq, &PeekContext)))
FspIoqProcessCompleteCanceledIrp(&Ioq->ProcessIoCsq, Irp);
Ioq->CompleteCanceledIrp(Irp);
}
BOOLEAN FspIoqPostIrp(FSP_IOQ *Ioq, PIRP Irp)

22
src/sys/lockctl.c
View File

@ -8,13 +8,13 @@
static NTSTATUS FspFsvolLockControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolLockControlComplete;
FSP_DRIVER_DISPATCH FspLockControl;
FSP_IOCMPL_DISPATCH FspLockControlComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolLockControl)
#pragma alloc_text(PAGE, FspFsvolLockControlComplete)
#pragma alloc_text(PAGE, FspLockControl)
#pragma alloc_text(PAGE, FspLockControlComplete)
#endif
static NTSTATUS FspFsvolLockControl(
@ -25,13 +25,19 @@ static NTSTATUS FspFsvolLockControl(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolLockControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspLockControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_LOCK_CONTROL == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -42,11 +48,3 @@ NTSTATUS FspLockControl(
FSP_LEAVE_MJ("%s", "");
}
VOID FspLockControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

22
src/sys/read.c
View File

@ -8,13 +8,13 @@
static NTSTATUS FspFsvolRead(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolReadComplete;
FSP_DRIVER_DISPATCH FspRead;
FSP_IOCMPL_DISPATCH FspReadComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolRead)
#pragma alloc_text(PAGE, FspFsvolReadComplete)
#pragma alloc_text(PAGE, FspRead)
#pragma alloc_text(PAGE, FspReadComplete)
#endif
static NTSTATUS FspFsvolRead(
@ -25,13 +25,19 @@ static NTSTATUS FspFsvolRead(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolReadComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspRead(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_READ == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -42,11 +48,3 @@ NTSTATUS FspRead(
FSP_LEAVE_MJ("%s", "");
}
VOID FspReadComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

86
src/sys/resource.c
View File

@ -1,86 +0,0 @@
/**
* @file sys/resource.c
*
* @copyright 2015 Bill Zissimopoulos
*/
#include <sys/driver.h>
FAST_IO_ACQUIRE_FILE FspAcquireFileForNtCreateSection;
FAST_IO_RELEASE_FILE FspReleaseFileForNtCreateSection;
FAST_IO_ACQUIRE_FOR_MOD_WRITE FspAcquireForModWrite;
FAST_IO_RELEASE_FOR_MOD_WRITE FspReleaseForModWrite;
FAST_IO_ACQUIRE_FOR_CCFLUSH FspAcquireForCcFlush;
FAST_IO_RELEASE_FOR_CCFLUSH FspReleaseForCcFlush;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspAcquireFileForNtCreateSection)
#pragma alloc_text(PAGE, FspReleaseFileForNtCreateSection)
#pragma alloc_text(PAGE, FspAcquireForModWrite)
#pragma alloc_text(PAGE, FspReleaseForModWrite)
#pragma alloc_text(PAGE, FspAcquireForCcFlush)
#pragma alloc_text(PAGE, FspReleaseForCcFlush)
#endif
VOID FspAcquireFileForNtCreateSection(
PFILE_OBJECT FileObject)
{
FSP_ENTER_VOID(PAGED_CODE());
FSP_LEAVE_VOID("%s", "");
}
VOID FspReleaseFileForNtCreateSection(
PFILE_OBJECT FileObject)
{
FSP_ENTER_VOID(PAGED_CODE());
FSP_LEAVE_VOID("%s", "");
}
NTSTATUS FspAcquireForModWrite(
PFILE_OBJECT FileObject,
PLARGE_INTEGER EndingOffset,
PERESOURCE *ResourceToRelease,
PDEVICE_OBJECT DeviceObject)
{
FSP_ENTER(PAGED_CODE());
Result = STATUS_NOT_IMPLEMENTED;
FSP_LEAVE("%s", "");
}
NTSTATUS FspReleaseForModWrite(
PFILE_OBJECT FileObject,
PERESOURCE ResourceToRelease,
PDEVICE_OBJECT DeviceObject)
{
FSP_ENTER(PAGED_CODE());
Result = STATUS_NOT_IMPLEMENTED;
FSP_LEAVE("%s", "");
}
NTSTATUS FspAcquireForCcFlush(
PFILE_OBJECT FileObject,
PDEVICE_OBJECT DeviceObject)
{
FSP_ENTER(PAGED_CODE());
Result = STATUS_NOT_IMPLEMENTED;
FSP_LEAVE("%s", "");
}
NTSTATUS FspReleaseForCcFlush(
PFILE_OBJECT FileObject,
PDEVICE_OBJECT DeviceObject)
{
FSP_ENTER(PAGED_CODE());
Result = STATUS_NOT_IMPLEMENTED;
FSP_LEAVE("%s", "");
}

44
src/sys/security.c
View File

@ -8,20 +8,20 @@
static NTSTATUS FspFsvolQuerySecurity(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolQuerySecurityComplete;
static NTSTATUS FspFsvolSetSecurity(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolSetSecurityComplete;
FSP_DRIVER_DISPATCH FspQuerySecurity;
FSP_DRIVER_DISPATCH FspSetSecurity;
FSP_IOCMPL_DISPATCH FspQuerySecurityComplete;
FSP_IOCMPL_DISPATCH FspSetSecurityComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolQuerySecurity)
#pragma alloc_text(PAGE, FspFsvolQuerySecurityComplete)
#pragma alloc_text(PAGE, FspFsvolSetSecurity)
#pragma alloc_text(PAGE, FspFsvolSetSecurityComplete)
#pragma alloc_text(PAGE, FspQuerySecurity)
#pragma alloc_text(PAGE, FspSetSecurity)
#pragma alloc_text(PAGE, FspQuerySecurityComplete)
#pragma alloc_text(PAGE, FspSetSecurityComplete)
#endif
static NTSTATUS FspFsvolQuerySecurity(
@ -32,6 +32,14 @@ static NTSTATUS FspFsvolQuerySecurity(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolQuerySecurityComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
static NTSTATUS FspFsvolSetSecurity(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
@ -40,13 +48,19 @@ static NTSTATUS FspFsvolSetSecurity(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolSetSecurityComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspQuerySecurity(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_QUERY_SECURITY == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -63,8 +77,6 @@ NTSTATUS FspSetSecurity(
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_SET_SECURITY == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -75,19 +87,3 @@ NTSTATUS FspSetSecurity(
FSP_LEAVE_MJ("%s", "");
}
VOID FspQuerySecurityComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
VOID FspSetSecurityComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

22
src/sys/shutdown.c
View File

@ -9,12 +9,12 @@
static NTSTATUS FspFsvolShutdown(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_DRIVER_DISPATCH FspShutdown;
FSP_IOCMPL_DISPATCH FspShutdownComplete;
FSP_IOCMPL_DISPATCH FspFsvolShutdownComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolShutdown)
#pragma alloc_text(PAGE, FspFsvolShutdownComplete)
#pragma alloc_text(PAGE, FspShutdown)
#pragma alloc_text(PAGE, FspShutdownComplete)
#endif
static NTSTATUS FspFsvolShutdown(
@ -25,13 +25,19 @@ static NTSTATUS FspFsvolShutdown(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolShutdownComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspShutdown(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_SHUTDOWN == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -42,11 +48,3 @@ NTSTATUS FspShutdown(
FSP_LEAVE_MJ("%s", "");
}
VOID FspShutdownComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

61
src/sys/util.c Normal file
View File

@ -0,0 +1,61 @@
/**
* @file sys/util.c
*
* @copyright 2015 Bill Zissimopoulos
*/
#include <sys/driver.h>
NTSTATUS FspCreateGuid(GUID *Guid);
VOID FspInitializeWorkItemWithDelay(FSP_WORK_ITEM_WITH_DELAY *WorkItem,
PWORKER_THREAD_ROUTINE Routine, PVOID Context);
VOID FspQueueWorkItemWithDelay(FSP_WORK_ITEM_WITH_DELAY *WorkItem, LARGE_INTEGER Timeout);
static KDEFERRED_ROUTINE FspQueueWorkItemWithDelayDPC;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspCreateGuid)
#pragma alloc_text(PAGE, FspInitializeWorkItemWithDelay)
#pragma alloc_text(PAGE, FspQueueWorkItemWithDelay)
#endif
NTSTATUS FspCreateGuid(GUID *Guid)
{
PAGED_CODE();
NTSTATUS Result;
int Retries = 3;
do
{
Result = ExUuidCreate(Guid);
} while (!NT_SUCCESS(Result) && 0 < --Retries);
return Result;
}
VOID FspInitializeWorkItemWithDelay(FSP_WORK_ITEM_WITH_DELAY *WorkItem,
PWORKER_THREAD_ROUTINE Routine, PVOID Context)
{
PAGED_CODE();
KeInitializeTimer(&WorkItem->Timer);
KeInitializeDpc(&WorkItem->Dpc, FspQueueWorkItemWithDelayDPC, WorkItem);
ExInitializeWorkItem(&WorkItem->WorkQueueItem, Routine, Context);
}
VOID FspQueueWorkItemWithDelay(FSP_WORK_ITEM_WITH_DELAY *WorkItem, LARGE_INTEGER Timeout)
{
PAGED_CODE();
KeSetTimer(&WorkItem->Timer, Timeout, &WorkItem->Dpc);
}
static VOID FspQueueWorkItemWithDelayDPC(PKDPC Dpc,
PVOID DeferredContext, PVOID SystemArgument1, PVOID SystemArgument2)
{
// !PAGED_CODE();
FSP_WORK_ITEM_WITH_DELAY *WorkItem = DeferredContext;
ExQueueWorkItem(&WorkItem->WorkQueueItem, DelayedWorkQueue);
}

44
src/sys/volinfo.c
View File

@ -8,20 +8,20 @@
static NTSTATUS FspFsvolQueryVolumeInformation(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolQueryVolumeInformationComplete;
static NTSTATUS FspFsvolSetVolumeInformation(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolSetVolumeInformationComplete;
FSP_DRIVER_DISPATCH FspQueryVolumeInformation;
FSP_DRIVER_DISPATCH FspSetVolumeInformation;
FSP_IOCMPL_DISPATCH FspQueryVolumeInformationComplete;
FSP_IOCMPL_DISPATCH FspSetVolumeInformationComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolQueryVolumeInformation)
#pragma alloc_text(PAGE, FspFsvolQueryVolumeInformationComplete)
#pragma alloc_text(PAGE, FspFsvolSetVolumeInformation)
#pragma alloc_text(PAGE, FspFsvolSetVolumeInformationComplete)
#pragma alloc_text(PAGE, FspQueryVolumeInformation)
#pragma alloc_text(PAGE, FspSetVolumeInformation)
#pragma alloc_text(PAGE, FspQueryVolumeInformationComplete)
#pragma alloc_text(PAGE, FspSetVolumeInformationComplete)
#endif
static NTSTATUS FspFsvolQueryVolumeInformation(
@ -32,6 +32,14 @@ static NTSTATUS FspFsvolQueryVolumeInformation(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolQueryVolumeInformationComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
static NTSTATUS FspFsvolSetVolumeInformation(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
@ -40,13 +48,19 @@ static NTSTATUS FspFsvolSetVolumeInformation(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolSetVolumeInformationComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspQueryVolumeInformation(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_QUERY_VOLUME_INFORMATION == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -63,8 +77,6 @@ NTSTATUS FspSetVolumeInformation(
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_SET_VOLUME_INFORMATION == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -75,19 +87,3 @@ NTSTATUS FspSetVolumeInformation(
FSP_LEAVE_MJ("%s", "");
}
VOID FspQueryVolumeInformationComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
VOID FspSetVolumeInformationComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

22
src/sys/write.c
View File

@ -8,13 +8,13 @@
static NTSTATUS FspFsvolWrite(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolWriteComplete;
FSP_DRIVER_DISPATCH FspWrite;
FSP_IOCMPL_DISPATCH FspWriteComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolWrite)
#pragma alloc_text(PAGE, FspFsvolWriteComplete)
#pragma alloc_text(PAGE, FspWrite)
#pragma alloc_text(PAGE, FspWriteComplete)
#endif
static NTSTATUS FspFsvolWrite(
@ -25,13 +25,19 @@ static NTSTATUS FspFsvolWrite(
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID FspFsvolWriteComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}
NTSTATUS FspWrite(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_WRITE == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
@ -42,11 +48,3 @@ NTSTATUS FspWrite(
FSP_LEAVE_MJ("%s", "");
}
VOID FspWriteComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
}

0
src/dll/debug.c → src0/dll/debug.c
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0
src/dll/fsctl.c → src0/dll/fsctl.c
View File

0
src/dll/library.c → src0/dll/library.c
View File

0
src/dll/library.h → src0/dll/library.h
View File

0
src/dll/loop.c → src0/dll/loop.c
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0
src/dll/ntstatus.c → src0/dll/ntstatus.c
View File

0
src/dll/ntstatus.i → src0/dll/ntstatus.i
View File

176
src0/sys/cleanup.c Normal file
View File

@ -0,0 +1,176 @@
/**
* @file sys/cleanup.c
*
* @copyright 2015 Bill Zissimopoulos
*/
#include <sys/driver.h>
static NTSTATUS FspFsctlCleanup(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvrtCleanup(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolCleanup(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolCleanupComplete;
FSP_DRIVER_DISPATCH FspCleanup;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsctlCleanup)
#pragma alloc_text(PAGE, FspFsvrtCleanup)
#pragma alloc_text(PAGE, FspFsvolCleanup)
#pragma alloc_text(PAGE, FspFsvolCleanupComplete)
#pragma alloc_text(PAGE, FspCleanup)
#endif
static NTSTATUS FspFsctlCleanup(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
return Result;
}
static NTSTATUS FspFsvrtCleanup(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
return Result;
}
static NTSTATUS FspFsvolCleanup(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
/* is this a valid FileObject? */
if (!FspFileContextIsValid(IrpSp->FileObject->FsContext))
return STATUS_SUCCESS;
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_CONTEXT *FsContext = FileObject->FsContext;
UINT64 UserContext = FsContext->UserContext;
UINT64 UserContext2 = (UINT_PTR)FileObject->FsContext2;
BOOLEAN DeletePending;
LONG OpenCount;
/* lock the FsContext */
ExAcquireResourceExclusiveLite(FsContext->Header.Resource, TRUE);
/* propagate the FsContext DeleteOnClose to DeletePending */
if (FsContext->DeleteOnClose)
FsContext->DeletePending = TRUE;
DeletePending = FsContext->DeletePending;
/* all handles on this FileObject are gone; decrement its FsContext->OpenCount */
OpenCount = FspFileContextClose(FsContext);
/* unlock the FsContext */
ExReleaseResourceLite(FsContext->Header.Resource);
/* is the FsContext going away as well? */
if (0 == OpenCount)
{
/*
* The following must be done under the file system volume device Resource,
* because we are manipulating its GenericTable.
*/
ExAcquireResourceExclusiveLite(&FsvolDeviceExtension->Base.Resource, TRUE);
try
{
/* remove the FsContext from the file system volume device generic table */
FspFsvolDeviceDeleteContext(DeviceObject, FsContext->UserContext, 0);
}
finally
{
ExReleaseResourceLite(&FsvolDeviceExtension->Base.Resource);
}
}
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
if (!FspDeviceRetain(FsvrtDeviceObject))
/* IRP_MJ_CLEANUP cannot really fail :-\ */
return STATUS_SUCCESS;
try
{
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
BOOLEAN FileNameRequired = 0 != FsvrtDeviceExtension->VolumeParams.FileNameRequired;
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request */
Result = FspIopCreateRequest(Irp, FileNameRequired ? &FsContext->FileName : 0, 0, &Request);
if (!NT_SUCCESS(Result))
goto leak_exit;
/*
* The new request is associated with our IRP and will be deleted during its completion.
*/
/* populate the Cleanup request */
Request->Kind = FspFsctlTransactCleanupKind;
Request->Req.Cleanup.UserContext = UserContext;
Request->Req.Cleanup.UserContext2 = UserContext2;
Request->Req.Cleanup.Delete = DeletePending && 0 == OpenCount;
Result = STATUS_PENDING;
goto exit;
leak_exit:;
#if DBG
DEBUGLOG("FileObject=%p[%p:\"%wZ\"], UserContext=%llx, UserContext2=%llx: "
"error: the user-mode file system handle will be leaked!",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName,
UserContext, UserContext2);
#endif
/* IRP_MJ_CLEANUP cannot really fail :-\ */
Result = STATUS_SUCCESS;
exit:;
}
finally
{
FspDeviceRelease(FsvrtDeviceObject);
}
return Result;
}
VOID FspFsvolCleanupComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("FileObject=%p", IrpSp->FileObject);
}
NTSTATUS FspCleanup(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_CLEANUP == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
FSP_RETURN(Result = FspFsvolCleanup(DeviceObject, Irp, IrpSp));
case FspFsvrtDeviceExtensionKind:
FSP_RETURN(Result = FspFsvrtCleanup(DeviceObject, Irp, IrpSp));
case FspFsctlDeviceExtensionKind:
FSP_RETURN(Result = FspFsctlCleanup(DeviceObject, Irp, IrpSp));
default:
FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
}
FSP_LEAVE_MJ("FileObject=%p", IrpSp->FileObject);
}

148
src0/sys/close.c Normal file
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/**
* @file sys/close.c
*
* @copyright 2015 Bill Zissimopoulos
*/
#include <sys/driver.h>
static NTSTATUS FspFsctlClose(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvrtClose(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolClose(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolCloseComplete;
FSP_DRIVER_DISPATCH FspClose;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsctlClose)
#pragma alloc_text(PAGE, FspFsvrtClose)
#pragma alloc_text(PAGE, FspFsvolClose)
#pragma alloc_text(PAGE, FspFsvolCloseComplete)
#pragma alloc_text(PAGE, FspClose)
#endif
static NTSTATUS FspFsctlClose(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
return Result;
}
static NTSTATUS FspFsvrtClose(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = 0;
return Result;
}
static NTSTATUS FspFsvolClose(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
/* is this a valid FileObject? */
if (!FspFileContextIsValid(IrpSp->FileObject->FsContext))
return STATUS_SUCCESS;
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_CONTEXT *FsContext = FileObject->FsContext;
UINT64 UserContext = FsContext->UserContext;
UINT64 UserContext2 = (UINT_PTR)FileObject->FsContext2;
/* dereference the FsContext (and delete if no more references) */
FspFileContextRelease(FsContext);
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
if (!FspDeviceRetain(FsvrtDeviceObject))
/* IRP_MJ_CLOSE cannot really fail :-\ */
return STATUS_SUCCESS;
try
{
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
BOOLEAN FileNameRequired = 0 != FsvrtDeviceExtension->VolumeParams.FileNameRequired;
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request */
Result = FspIopCreateRequest(0, FileNameRequired ? &FsContext->FileName : 0, 0, &Request);
if (!NT_SUCCESS(Result))
goto leak_exit;
/*
* The new request is associated with our IRP and will be deleted during its completion.
*/
/* populate the Close request */
Request->Kind = FspFsctlTransactCloseKind;
Request->Req.Close.UserContext = UserContext;
Request->Req.Close.UserContext2 = UserContext2;
/* post as a work request; this allows us to complete our own IRP and return immediately! */
if (!FspIopPostWorkRequest(DeviceObject, Request))
/* no need to delete the request here as FspIopPostWorkRequest() will do so in all cases */
goto leak_exit;
Result = STATUS_SUCCESS;
goto exit;
leak_exit:;
#if DBG
DEBUGLOG("FileObject=%p[%p:\"%wZ\"], UserContext=%llx, UserContext2=%llx: "
"error: the user-mode file system handle will be leaked!",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName,
UserContext, UserContext2);
#endif
/* IRP_MJ_CLOSE cannot really fail :-\ */
Result = STATUS_SUCCESS;
exit:;
}
finally
{
FspDeviceRelease(FsvrtDeviceObject);
}
return Result;
}
VOID FspFsvolCloseComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("FileObject=%p", IrpSp->FileObject);
}
NTSTATUS FspClose(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_CLOSE == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
FSP_RETURN(Result = FspFsvolClose(DeviceObject, Irp, IrpSp));
case FspFsvrtDeviceExtensionKind:
FSP_RETURN(Result = FspFsvrtClose(DeviceObject, Irp, IrpSp));
case FspFsctlDeviceExtensionKind:
FSP_RETURN(Result = FspFsctlClose(DeviceObject, Irp, IrpSp));
default:
FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
}
FSP_LEAVE_MJ("FileObject=%p", IrpSp->FileObject);
}

767
src0/sys/create.c Normal file
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@ -0,0 +1,767 @@
/**
* @file sys/create.c
*
* @copyright 2015 Bill Zissimopoulos
*/
#include <sys/driver.h>
static NTSTATUS FspFsctlCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvrtCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOPREP_DISPATCH FspFsvolCreatePrepare;
FSP_IOCMPL_DISPATCH FspFsvolCreateComplete;
static VOID FspFsvolCreateCleanupClose(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
FSP_IOP_REQUEST_FINI FspFsvolCreateRequestFini;
FSP_DRIVER_DISPATCH FspCreate;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsctlCreate)
#pragma alloc_text(PAGE, FspFsvrtCreate)
#pragma alloc_text(PAGE, FspFsvolCreate)
#pragma alloc_text(PAGE, FspFsvolCreatePrepare)
#pragma alloc_text(PAGE, FspFsvolCreateComplete)
#pragma alloc_text(PAGE, FspFsvolCreateCleanupClose)
#pragma alloc_text(PAGE, FspFsvolCreateRequestFini)
#pragma alloc_text(PAGE, FspCreate)
#endif
enum
{
RequestFsContext = 0,
RequestAccessToken,
};
static NTSTATUS FspFsctlCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
return Result;
}
static NTSTATUS FspFsvrtCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
return Result;
}
static NTSTATUS FspFsvolCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
/* open the volume object? */
if (0 == IrpSp->FileObject->FileName.Length &&
(0 == IrpSp->FileObject->RelatedFileObject ||
0 == IrpSp->FileObject->RelatedFileObject->FsContext))
{
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
IrpSp->FileObject->Vpb = FsvrtDeviceObject->Vpb;
Irp->IoStatus.Information = FILE_OPENED;
return STATUS_SUCCESS;
}
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
if (!FspDeviceRetain(FsvrtDeviceObject))
return STATUS_CANCELLED;
try
{
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
PFILE_OBJECT FileObject = IrpSp->FileObject;
PFILE_OBJECT RelatedFileObject = FileObject->RelatedFileObject;
UNICODE_STRING FileName = FileObject->FileName;
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ULONG CreateOptions = IrpSp->Parameters.Create.Options;
USHORT FileAttributes = IrpSp->Parameters.Create.FileAttributes;
PSECURITY_DESCRIPTOR SecurityDescriptor = AccessState->SecurityDescriptor;
ULONG SecurityDescriptorSize = 0;
LARGE_INTEGER AllocationSize = Irp->Overlay.AllocationSize;
ACCESS_MASK DesiredAccess = IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
PFILE_FULL_EA_INFORMATION EaBuffer = Irp->AssociatedIrp.SystemBuffer;
//ULONG EaLength = IrpSp->Parameters.Create.EaLength;
ULONG Flags = IrpSp->Flags;
KPROCESSOR_MODE RequestorMode =
FlagOn(Flags, SL_FORCE_ACCESS_CHECK) ? UserMode : Irp->RequestorMode;
BOOLEAN HasTraversePrivilege =
BooleanFlagOn(AccessState->Flags, TOKEN_HAS_TRAVERSE_PRIVILEGE);
BOOLEAN IsAbsoluteSecurityDescriptor = FALSE;
BOOLEAN IsSelfRelativeSecurityDescriptor = FALSE;
BOOLEAN HasTrailingBackslash = FALSE;
FSP_FILE_CONTEXT *FsContext = 0;
FSP_FSCTL_TRANSACT_REQ *Request;
/* cannot open a paging file */
if (FlagOn(Flags, SL_OPEN_PAGING_FILE))
{
Result = STATUS_ACCESS_DENIED;
goto exit;
}
/* cannot open files by fileid */
if (FlagOn(CreateOptions, FILE_OPEN_BY_FILE_ID))
{
Result = STATUS_NOT_IMPLEMENTED;
goto exit;
}
/* do we support EA? */
if (0 != EaBuffer && !FsvrtDeviceExtension->VolumeParams.EaSupported)
{
Result = STATUS_EAS_NOT_SUPPORTED;
goto exit;
}
/* check create options */
if (FlagOn(CreateOptions, FILE_NON_DIRECTORY_FILE) &&
FlagOn(CreateOptions, FILE_DIRECTORY_FILE))
{
Result = STATUS_INVALID_PARAMETER;
goto exit;
}
/* check security descriptor validity */
if (0 != SecurityDescriptor)
{
IsAbsoluteSecurityDescriptor = RtlValidSecurityDescriptor(SecurityDescriptor);
if (IsAbsoluteSecurityDescriptor)
{
Result = RtlAbsoluteToSelfRelativeSD(SecurityDescriptor, 0, &SecurityDescriptorSize);
if (STATUS_BUFFER_TOO_SMALL != Result)
{
Result = STATUS_INVALID_PARAMETER;
goto exit;
}
}
else
{
SecurityDescriptorSize = RtlLengthSecurityDescriptor(SecurityDescriptor);
IsSelfRelativeSecurityDescriptor = RtlValidRelativeSecurityDescriptor(
SecurityDescriptor, SecurityDescriptorSize, 0);
if (!IsSelfRelativeSecurityDescriptor)
{
Result = STATUS_INVALID_PARAMETER;
goto exit;
}
}
}
/* according to fastfat, filenames that begin with two backslashes are ok */
if (sizeof(WCHAR) * 2 <= FileName.Length &&
L'\\' == FileName.Buffer[1] && L'\\' == FileName.Buffer[0])
{
FileName.Length -= sizeof(WCHAR);
FileName.MaximumLength -= sizeof(WCHAR);
FileName.Buffer++;
if (sizeof(WCHAR) * 2 <= FileName.Length &&
L'\\' == FileName.Buffer[1] && L'\\' == FileName.Buffer[0])
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
}
/* check for trailing backslash */
if (sizeof(WCHAR) * 2/* not empty or root */ <= FileName.Length &&
L'\\' == FileName.Buffer[FileName.Length / 2 - 1])
{
FileName.Length -= sizeof(WCHAR);
HasTrailingBackslash = TRUE;
if (sizeof(WCHAR) * 2 <= FileName.Length && L'\\' == FileName.Buffer[FileName.Length / 2 - 1])
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
}
if (HasTrailingBackslash && !FlagOn(CreateOptions, FILE_DIRECTORY_FILE))
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
/* is this a relative or absolute open? */
if (0 != RelatedFileObject)
{
FSP_FILE_CONTEXT *RelatedFsContext = RelatedFileObject->FsContext;
/* is this a valid RelatedFileObject? */
if (!FspFileContextIsValid(RelatedFsContext))
{
Result = STATUS_OBJECT_PATH_NOT_FOUND;
goto exit;
}
/* must be a relative path */
if (sizeof(WCHAR) <= FileName.Length && L'\\' == FileName.Buffer[0])
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
/* cannot FILE_DELETE_ON_CLOSE on the root directory */
if (sizeof(WCHAR) == RelatedFsContext->FileName.Length &&
0 == FileName.Length &&
FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
{
Result = STATUS_CANNOT_DELETE;
goto exit;
}
/*
* There is no need to lock our accesses of RelatedFileObject->FsContext->FileName,
* because RelatedFileObject->FsContext->Filename is read-only (after creation) and
* because RelatedFileObject->FsContext is guaranteed to exist while RelatedFileObject
* exists.
*/
BOOLEAN AppendBackslash =
sizeof(WCHAR) * 2/* not empty or root */ <= RelatedFsContext->FileName.Length &&
sizeof(WCHAR) <= FileName.Length && L':' != FileName.Buffer[0];
Result = FspFileContextCreate(DeviceObject,
RelatedFsContext->FileName.Length + AppendBackslash * sizeof(WCHAR) + FileName.Length,
&FsContext);
if (!NT_SUCCESS(Result))
goto exit;
Result = RtlAppendUnicodeStringToString(&FsContext->FileName, &RelatedFsContext->FileName);
ASSERT(NT_SUCCESS(Result));
if (AppendBackslash)
{
Result = RtlAppendUnicodeToString(&FsContext->FileName, L"\\");
ASSERT(NT_SUCCESS(Result));
}
}
else
{
/* must be an absolute path */
if (sizeof(WCHAR) <= FileName.Length && L'\\' != FileName.Buffer[0])
{
Result = STATUS_OBJECT_NAME_INVALID;
goto exit;
}
/* cannot FILE_DELETE_ON_CLOSE on the root directory */
if (sizeof(WCHAR) == FileName.Length &&
FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
{
Result = STATUS_CANNOT_DELETE;
goto exit;
}
Result = FspFileContextCreate(DeviceObject,
FileName.Length,
&FsContext);
if (!NT_SUCCESS(Result))
goto exit;
}
Result = RtlAppendUnicodeStringToString(&FsContext->FileName, &FileName);
ASSERT(NT_SUCCESS(Result));
/* create the user-mode file system request */
Result = FspIopCreateRequestEx(Irp, &FsContext->FileName, SecurityDescriptorSize,
FspFsvolCreateRequestFini, &Request);
if (!NT_SUCCESS(Result))
{
FspFileContextRelease(FsContext);
goto exit;
}
/*
* The new request is associated with our IRP and will be deleted during its completion.
* Go ahead and associate our FsContext with the Request as well.
*/
FspIopRequestContext(Request, RequestFsContext) = FsContext;
/* populate the Create request */
Request->Kind = FspFsctlTransactCreateKind;
Request->Req.Create.CreateOptions = CreateOptions;
Request->Req.Create.FileAttributes = FileAttributes;
Request->Req.Create.SecurityDescriptor.Offset = 0 == SecurityDescriptorSize ? 0 :
FSP_FSCTL_DEFAULT_ALIGN_UP(Request->FileName.Size);
Request->Req.Create.SecurityDescriptor.Size = (UINT16)SecurityDescriptorSize;
Request->Req.Create.AllocationSize = AllocationSize.QuadPart;
Request->Req.Create.AccessToken = 0;
Request->Req.Create.DesiredAccess = DesiredAccess;
Request->Req.Create.ShareAccess = ShareAccess;
Request->Req.Create.Ea.Offset = 0;
Request->Req.Create.Ea.Size = 0;
Request->Req.Create.UserMode = UserMode == RequestorMode;
Request->Req.Create.HasTraversePrivilege = HasTraversePrivilege;
Request->Req.Create.OpenTargetDirectory = BooleanFlagOn(Flags, SL_OPEN_TARGET_DIRECTORY);
Request->Req.Create.CaseSensitive = BooleanFlagOn(Flags, SL_CASE_SENSITIVE);
/* copy the security descriptor into the request */
if (IsAbsoluteSecurityDescriptor)
{
Result = RtlAbsoluteToSelfRelativeSD(SecurityDescriptor,
Request->Buffer + Request->Req.Create.SecurityDescriptor.Offset, &SecurityDescriptorSize);
if (!NT_SUCCESS(Result))
{
if (STATUS_BAD_DESCRIPTOR_FORMAT == Result || STATUS_BUFFER_TOO_SMALL == Result)
Result = STATUS_INVALID_PARAMETER; /* should not happen */
goto exit;
}
}
else if (IsSelfRelativeSecurityDescriptor)
RtlCopyMemory(Request->Buffer + Request->Req.Create.SecurityDescriptor.Offset,
SecurityDescriptor, SecurityDescriptorSize);
Result = STATUS_PENDING;
exit:;
}
finally
{
FspDeviceRelease(FsvrtDeviceObject);
}
return Result;
}
NTSTATUS FspFsvolCreatePrepare(
PIRP Irp, FSP_FSCTL_TRANSACT_REQ *Request)
{
FSP_ENTER_IOP(PAGED_CODE());
PDEVICE_OBJECT DeviceObject = IrpSp->DeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =
FspFsvrtDeviceExtension(FsvolDeviceExtension->FsvrtDeviceObject);
/* is the user-mode file system doing access checks? */
if (!FsvrtDeviceExtension->VolumeParams.NoSystemAccessCheck)
{
ASSERT(0 == Request->Req.Create.AccessToken);
FSP_RETURN(Result = STATUS_SUCCESS);
}
/* get a user-mode handle to the access token */
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
HANDLE UserModeAccessToken;
Result = ObOpenObjectByPointer(SeQuerySubjectContextToken(&AccessState->SubjectSecurityContext),
0, 0, TOKEN_QUERY, *SeTokenObjectType, UserMode, &UserModeAccessToken);
if (!NT_SUCCESS(Result))
FSP_RETURN();
/* send the user-mode handle to the user-mode file system */
FspIopRequestContext(Request, RequestAccessToken) = UserModeAccessToken;
Request->Req.Create.AccessToken = (UINT_PTR)UserModeAccessToken;
FSP_LEAVE_IOP();
}
VOID FspFsvolCreateComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
/*
* NOTE:
* In the following we may have to close the just opened file object. But we must
* never close a file we just created, because this will leave an orphan file on
* the disk.
*
* Files may have to be closed if a security access or share access check fails. In
* both those cases we were opening an existing file and so it is safe to close it.
*
* Because of how IRP_MJ_CREATE works in Windows, it is difficult to improve on this
* scheme without introducing a 2-phase Create protocol, which is undesirable as it
* means two trips into user-mode for a single Create request.
*/
PDEVICE_OBJECT DeviceObject = IrpSp->DeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
PFILE_OBJECT FileObject = IrpSp->FileObject;
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ULONG CreateOptions = IrpSp->Parameters.Create.Options;
BOOLEAN FileCreated = FILE_CREATED == Response->IoStatus.Information;
UINT32 ResponseFileAttributes = Response->Rsp.Create.Opened.FileAttributes;
PSECURITY_DESCRIPTOR SecurityDescriptor;
ULONG SecurityDescriptorSize;
UNICODE_STRING ReparseFileName;
ACCESS_MASK DesiredAccess = IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
PPRIVILEGE_SET Privileges = 0;
USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
ULONG Flags = IrpSp->Flags;
KPROCESSOR_MODE RequestorMode =
FlagOn(Flags, SL_FORCE_ACCESS_CHECK) ? UserMode : Irp->RequestorMode;
FSP_FILE_CONTEXT *FsContext = FspIopRequestContext(Request, RequestFsContext);
ACCESS_MASK GrantedAccess;
BOOLEAN Inserted = FALSE;
/* did the user-mode file system sent us a failure code? */
if (!NT_SUCCESS(Response->IoStatus.Status))
{
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_RETURN();
}
/* special case STATUS_REPARSE */
if (STATUS_REPARSE == Result)
{
ReparseFileName.Buffer =
(PVOID)(Response->Buffer + Response->Rsp.Create.Reparse.FileName.Offset);
ReparseFileName.Length = ReparseFileName.MaximumLength =
Response->Rsp.Create.Reparse.FileName.Size;
Result = STATUS_ACCESS_DENIED;
if (IO_REPARSE == Response->IoStatus.Information)
{
if (0 == ReparseFileName.Length ||
(PUINT8)ReparseFileName.Buffer + ReparseFileName.Length >
(PUINT8)Response + Response->Size)
FSP_RETURN();
if (ReparseFileName.Length > FileObject->FileName.MaximumLength)
{
PVOID Buffer = FspAllocExternal(ReparseFileName.Length);
if (0 == Buffer)
FSP_RETURN(Result = STATUS_INSUFFICIENT_RESOURCES);
FspFreeExternal(FileObject->FileName.Buffer);
FileObject->FileName.MaximumLength = ReparseFileName.Length;
FileObject->FileName.Buffer = Buffer;
}
FileObject->FileName.Length = 0;
RtlCopyUnicodeString(&FileObject->FileName, &ReparseFileName);
}
else
if (IO_REMOUNT == Response->IoStatus.Information)
{
if (0 != ReparseFileName.Length)
FSP_RETURN();
}
else
FSP_RETURN();
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_RETURN();
}
/* are we doing access checks? */
if (!FsvrtDeviceExtension->VolumeParams.NoSystemAccessCheck)
{
/* read-only attribute check */
if (!FileCreated && FlagOn(ResponseFileAttributes, FILE_ATTRIBUTE_READONLY))
{
/* from fastfat: allowed accesses when read-only */
ACCESS_MASK Allowed =
DELETE | READ_CONTROL | WRITE_OWNER | WRITE_DAC |
SYNCHRONIZE | ACCESS_SYSTEM_SECURITY |
FILE_READ_DATA | FILE_READ_EA | FILE_WRITE_EA |
FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES |
FILE_EXECUTE | FILE_TRAVERSE | FILE_LIST_DIRECTORY |
FILE_ADD_SUBDIRECTORY | FILE_ADD_FILE | FILE_DELETE_CHILD;
if (FlagOn(DesiredAccess, ~Allowed))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_ACCESS_DENIED);
}
else
if (!FlagOn(ResponseFileAttributes, FILE_ATTRIBUTE_DIRECTORY) &&
FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_CANNOT_DELETE);
}
}
/* security descriptor check */
SecurityDescriptor =
(PVOID)(Response->Buffer + Response->Rsp.Create.Opened.SecurityDescriptor.Offset);
SecurityDescriptorSize = Response->Rsp.Create.Opened.SecurityDescriptor.Size;
if (0 != SecurityDescriptorSize)
{
if ((PUINT8)SecurityDescriptor + SecurityDescriptorSize >
(PUINT8)Response + Response->Size ||
!FspValidRelativeSecurityDescriptor(SecurityDescriptor, SecurityDescriptorSize, 0))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_ACCESS_DENIED);
}
/* access check */
if (!SeAccessCheck(SecurityDescriptor,
&AccessState->SubjectSecurityContext,
FALSE,
DesiredAccess,
AccessState->PreviouslyGrantedAccess,
&Privileges,
IoGetFileObjectGenericMapping(),
RequestorMode,
&GrantedAccess,
&Result))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN();
}
if (0 != Privileges)
{
Result = SeAppendPrivileges(AccessState, Privileges);
SeFreePrivileges(Privileges);
if (!NT_SUCCESS(Result))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN();
}
}
SetFlag(AccessState->PreviouslyGrantedAccess, GrantedAccess);
ClearFlag(AccessState->RemainingDesiredAccess, GrantedAccess);
}
}
/* were we asked to open a directory or non-directory? */
if (FlagOn(CreateOptions, FILE_DIRECTORY_FILE) &&
!FileCreated && !FlagOn(ResponseFileAttributes, FILE_ATTRIBUTE_DIRECTORY))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_NOT_A_DIRECTORY);
}
if (FlagOn(CreateOptions, FILE_NON_DIRECTORY_FILE) &&
!FileCreated && FlagOn(ResponseFileAttributes, FILE_ATTRIBUTE_DIRECTORY))
{
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN(Result = STATUS_FILE_IS_A_DIRECTORY);
}
/*
* The following must be done under the file system volume device Resource,
* because we are manipulating its GenericTable and accessing foreign FsContext's.
*/
ExAcquireResourceExclusiveLite(&FsvolDeviceExtension->Base.Resource, TRUE);
try
{
/* insert the newly created FsContext into our generic table */
FsContext = FspFsvolDeviceInsertContext(DeviceObject,
FsContext->UserContext, FsContext, &FsContext->ElementStorage, &Inserted);
ASSERT(0 != FsContext);
/* share access check */
if (Inserted)
{
/*
* This is a newly created FsContext. Set its share access and
* increment its open count. There is no need to acquire the
* FsContext's Resource (because it is newly created).
*/
IoSetShareAccess(AccessState->PreviouslyGrantedAccess,
ShareAccess, FileObject, &FsContext->ShareAccess);
FspFileContextOpen(FsContext);
if (FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
FsContext->DeleteOnClose = TRUE;
Result = STATUS_SUCCESS;
}
else
{
/*
* This is an existing FsContext. We must acquire its Resource and
* check if there is a delete pending and the share access. Only if
* both tests succeed we increment the open count and report success.
*/
ExAcquireResourceExclusiveLite(FsContext->Header.Resource, TRUE);
if (FsContext->DeletePending)
Result = STATUS_DELETE_PENDING;
else
Result = IoCheckShareAccess(AccessState->PreviouslyGrantedAccess,
ShareAccess, FileObject, &FsContext->ShareAccess, TRUE);
if (NT_SUCCESS(Result))
{
FspFileContextRetain(FsContext);
FspFileContextOpen(FsContext);
if (FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE))
FsContext->DeleteOnClose = TRUE;
}
ExReleaseResourceLite(FsContext->Header.Resource);
}
}
finally
{
ExReleaseResourceLite(&FsvolDeviceExtension->Base.Resource);
}
/* did we fail our share access checks? */
if (!NT_SUCCESS(Result))
{
ASSERT(!Inserted);
FspFsvolCreateCleanupClose(Irp, Response);
FSP_RETURN();
}
/*
* Looks like SUCCESS!
*/
/* did an FsContext with the same UserContext already exist? */
if (!Inserted)
/* delete the newly created FsContext as it is not being used */
FspFileContextRelease(FspIopRequestContext(Request, RequestFsContext));
/* disassociate our FsContext from the Request */
FspIopRequestContext(Request, RequestFsContext) = 0;
/* record the user-mode file system contexts */
FsContext->UserContext = Response->Rsp.Create.Opened.UserContext;
FileObject->FsContext = FsContext;
FileObject->FsContext2 = (PVOID)(UINT_PTR)Response->Rsp.Create.Opened.UserContext2;
/* finish seting up the FileObject */
FileObject->Vpb = FsvrtDeviceObject->Vpb;
/* SUCCESS! */
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_LEAVE_IOC(
"FileObject=%p[%p:\"%wZ\"]",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName);
}
static VOID FspFsvolCreateCleanupClose(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
PAGED_CODE();
/*
* This routine handles the case where we must close an open file,
* because of a failure during Create completion. We simply create
* a CreateClose request and we post it as a work item.
*
* Ideally there would be no failure modes for this routine. Reality is
* different.
*
* The more serious (but perhaps non-existent in practice) failure is a
* memory allocation failure. In this case we will leak the user-mode
* file system handle!
*
* This routine may also fail if we cannot post a work item, which means that
* the virtual volume device and the file system volume device are being
* deleted. Because it is assumed that only the user-mode file system would
* initiate a device deletion, this case is more benign (presumably the file
* system knows to close off all its handles when tearing down its devices).
*/
NTSTATUS Result;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
PDEVICE_OBJECT DeviceObject = IrpSp->DeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =
FspFsvrtDeviceExtension(FsvolDeviceExtension->FsvrtDeviceObject);
FSP_FSCTL_TRANSACT_REQ *OriginalRequest = FspIrpRequest(Irp);
FSP_FILE_CONTEXT *FsContext = FspIopRequestContext(OriginalRequest, RequestFsContext);
UINT64 UserContext = Response->Rsp.Create.Opened.UserContext;
UINT64 UserContext2 = Response->Rsp.Create.Opened.UserContext2;
BOOLEAN FileNameRequired = 0 != FsvrtDeviceExtension->VolumeParams.FileNameRequired;
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request */
Result = FspIopCreateRequest(0, FileNameRequired ? &FsContext->FileName : 0, 0, &Request);
if (!NT_SUCCESS(Result))
goto leak_exit;
/* populate the CreateCleanupClose request */
Request->Kind = FspFsctlTransactCreateCleanupCloseKind;
Request->Req.Cleanup.UserContext = UserContext;
Request->Req.Cleanup.UserContext2 = UserContext2;
Request->Req.Cleanup.Delete = FILE_CREATED == Response->IoStatus.Information;
/* post as a work request */
if (!FspIopPostWorkRequest(DeviceObject, Request))
/* no need to delete the request here as FspIopPostWorkRequest() will do so in all cases */
goto leak_exit;
goto exit;
leak_exit:;
#if DBG
DEBUGLOG("FileObject=%p[%p:\"%wZ\"], UserContext=%llx, UserContext2=%llx: "
"error: the user-mode file system handle will be leaked!",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName,
UserContext, UserContext2);
#endif
exit:;
}
VOID FspFsvolCreateRequestFini(PVOID Context[3])
{
PAGED_CODE();
if (0 != Context[RequestFsContext])
FspFileContextRelease(Context[RequestFsContext]);
if (0 != Context[RequestAccessToken])
{
#if DBG
NTSTATUS Result0;
Result0 = ObCloseHandle(Context[RequestAccessToken], KernelMode);
if (!NT_SUCCESS(Result0))
DEBUGLOG("ObCloseHandle() = %s", NtStatusSym(Result0));
#else
ObCloseHandle(Context[RequestAccessToken], KernelMode);
#endif
}
}
NTSTATUS FspCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_CREATE == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
FSP_RETURN(Result = FspFsvolCreate(DeviceObject, Irp, IrpSp));
case FspFsvrtDeviceExtensionKind:
FSP_RETURN(Result = FspFsvrtCreate(DeviceObject, Irp, IrpSp));
case FspFsctlDeviceExtensionKind:
FSP_RETURN(Result = FspFsctlCreate(DeviceObject, Irp, IrpSp));
default:
FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
}
FSP_LEAVE_MJ(
"FileObject=%p[%p:\"%wZ\"], "
"Flags=%x, "
"DesiredAccess=%#lx, "
"ShareAccess=%#x, "
"Options=%#lx, "
"FileAttributes=%#x, "
"AllocationSize=%#lx:%#lx, "
"Ea=%p, EaLength=%ld",
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName,
IrpSp->Flags,
IrpSp->Parameters.Create.SecurityContext->DesiredAccess,
IrpSp->Parameters.Create.ShareAccess,
IrpSp->Parameters.Create.Options,
IrpSp->Parameters.Create.FileAttributes,
Irp->Overlay.AllocationSize.HighPart, Irp->Overlay.AllocationSize.LowPart,
Irp->AssociatedIrp.SystemBuffer, IrpSp->Parameters.Create.EaLength);
}

0
src/sys/fileobj.c → src0/sys/fileobj.c
View File

625
src0/sys/fsctl.c Normal file
View File

@ -0,0 +1,625 @@
/**
* @file sys/fsctl.c
*
* @copyright 2015 Bill Zissimopoulos
*/
#include <sys/driver.h>
/*
* Overview
*
* The fsctl module provides the IOCTL interface to interact with the
* user-mode file system. The user-mode file system can use the IOCTL's
* to create new volumes, delete them (while they are live!) and transact
* with them.
*
*
* Volume Creation
*
* The creation of a new volume is performed using an FSP_FSCTL_CREATE
* IOCTL code. Creation is simple: a new device \Device\Volume{GUID} is
* created and its path is returned to the user-mode file system. The
* user-mode file system also passes a security descriptor to associate
* with the new virtual volume device so that only the creating user-mode
* file system can control the new volume.
*
*
* Volume Deletion
*
* Deletion of an existing volume is performed using FSP_FSCTL_DELETE and
* is quite a bit more involved. We must protect against the following two
* eventualities: (1) that the volume is currently in use and cannot simply
* go away, and (2) that a simultaneous mount operation is taking place
* while we are deleting the volume.
*
* To protect against the first eventuality we maintain a reference count
* on all our device extensions. Every time an MJ function is entered,
* the reference count is incremented (FspDeviceRetain). Every time
* an IRP is completed, the reference count is decremented (FspDeviceRelease).
* When the reference count reaches 0 the device is deleted using
* IoDeleteDevice. This ensures that a device will not go away while an
* IRP is being pending/processed.
*
* To protect against the second eventuality we use the lock (ERESOURCE)
* on the root Fsctl device to wrap volume deletion and attempts from the
* system to mount the same volume. We also mark the virtual volume device
* as Deleted in case we attempt to delete it (FspDeviceRelease) but we
* cannot because it is currently in use.
*
* A sticky point is our use of the Windows VPB. It is not well documented
* how one should handle this structure during forcible dismount. The fastfat
* and cdfs samples use a technique where they keep a spare VPB and they swap
* it with the volume one during forcible dismount. We do something similar.
* The issue is what to do with the old VPB, because we can delete a volume
* that is not currently being used. We check the VPB's ReferenceCount and
* we free the VPB in this case.
*
*
* Volume Transact
*
* The user-mode file system's primary interaction with the kernel-mode driver
* is by using the FSP_FSCTL_TRANSACT IOCTL code. Every virtual volume device
* maintains an FSP_IOQ (refer to ioq.c for more). When an FSP_FSCTL_TRANSACT
* arrives it first processes any responses (FSP_FSCTL_TRANSACT_RSP) that the
* user-mode file system has sent to handle requests sent to it using a prior
* FSP_FSCTL_TRANSACT. It then proceeds to handle any pending IRP requests by
* sending the corresponding requests (FSP_FSCTL_TRANSACT_REQ) to the user-
* mode file system.
*/
static NTSTATUS FspFsctlCreateVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsctlMountVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvrtDeleteVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static WORKER_THREAD_ROUTINE FspFsvrtDeleteVolumeDelayed;
static NTSTATUS FspFsvrtTransact(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsctlFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvrtFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_DRIVER_DISPATCH FspFileSystemControl;
FSP_IOCMPL_DISPATCH FspFileSystemControlComplete;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsctlCreateVolume)
#pragma alloc_text(PAGE, FspFsctlMountVolume)
#pragma alloc_text(PAGE, FspFsvrtDeleteVolume)
#pragma alloc_text(PAGE, FspFsvrtDeleteVolumeDelayed)
#pragma alloc_text(PAGE, FspFsvrtTransact)
#pragma alloc_text(PAGE, FspFsctlFileSystemControl)
#pragma alloc_text(PAGE, FspFsvrtFileSystemControl)
#pragma alloc_text(PAGE, FspFsvolFileSystemControl)
#pragma alloc_text(PAGE, FspFileSystemControl)
#pragma alloc_text(PAGE, FspFileSystemControlComplete)
#endif
static NTSTATUS FspFsctlCreateVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
/* check parameters */
ULONG InputBufferLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
ULONG OutputBufferLength = IrpSp->Parameters.FileSystemControl.OutputBufferLength;
PVOID SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
PSECURITY_DESCRIPTOR SecurityDescriptor =
(PVOID)((PUINT8)SystemBuffer + FSP_FSCTL_VOLUME_PARAMS_SIZE);
DWORD SecurityDescriptorSize = InputBufferLength - FSP_FSCTL_VOLUME_PARAMS_SIZE;
if (FSP_FSCTL_VOLUME_PARAMS_SIZE >= InputBufferLength || 0 == SystemBuffer ||
!FspValidRelativeSecurityDescriptor(SecurityDescriptor, SecurityDescriptorSize,
DACL_SECURITY_INFORMATION))
return STATUS_INVALID_PARAMETER;
if (FSP_FSCTL_CREATE_BUFFER_SIZEMIN > OutputBufferLength)
return STATUS_BUFFER_TOO_SMALL;
NTSTATUS Result;
FSP_FSCTL_VOLUME_PARAMS VolumeParams = *(FSP_FSCTL_VOLUME_PARAMS *)SystemBuffer;
PVOID SecurityDescriptorBuf = 0;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension;
/* check the passed in VolumeParams */
if (FspFsctlIrpTimeoutMinimum > VolumeParams.IrpTimeout ||
VolumeParams.IrpTimeout > FspFsctlIrpTimeoutMaximum)
#if DBG
/* allow the debug timeout value on debug builds */
if (FspFsctlIrpTimeoutDebug != VolumeParams.IrpTimeout)
#endif
VolumeParams.IrpTimeout = FspFsctlIrpTimeoutDefault;
if (FspFsctlTransactTimeoutMinimum > VolumeParams.TransactTimeout ||
VolumeParams.TransactTimeout > FspFsctlTransactTimeoutMaximum)
VolumeParams.TransactTimeout = FspFsctlTransactTimeoutDefault;
/* create volume guid */
GUID Guid;
Result = FspCreateGuid(&Guid);
if (!NT_SUCCESS(Result))
return Result;
/* copy the security descriptor from the system buffer to a temporary one */
SecurityDescriptorBuf = FspAlloc(SecurityDescriptorSize);
if (0 == SecurityDescriptorBuf)
return STATUS_INSUFFICIENT_RESOURCES;
RtlCopyMemory(SecurityDescriptorBuf, SecurityDescriptor, SecurityDescriptorSize);
/* prepare the device name and SDDL */
PDEVICE_OBJECT FsvrtDeviceObject;
UNICODE_STRING DeviceSddl;
UNICODE_STRING DeviceName;
RtlInitUnicodeString(&DeviceSddl, L"" FSP_FSVRT_DEVICE_SDDL);
RtlInitEmptyUnicodeString(&DeviceName, SystemBuffer, FSP_FSCTL_CREATE_BUFFER_SIZEMIN);
Result = RtlUnicodeStringPrintf(&DeviceName,
L"\\Device\\Volume{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}",
Guid.Data1, Guid.Data2, Guid.Data3,
Guid.Data4[0], Guid.Data4[1], Guid.Data4[2], Guid.Data4[3],
Guid.Data4[4], Guid.Data4[5], Guid.Data4[6], Guid.Data4[7]);
ASSERT(NT_SUCCESS(Result));
/* create the virtual volume device */
FSP_FSCTL_DEVICE_EXTENSION *FsctlDeviceExtension = FspFsctlDeviceExtension(DeviceObject);
ExAcquireResourceExclusiveLite(&FsctlDeviceExtension->Base.Resource, TRUE);
try
{
Result = FspDeviceCreateSecure(FspFsvrtDeviceExtensionKind, SecurityDescriptorSize,
&DeviceName, FILE_DEVICE_VIRTUAL_DISK,
&DeviceSddl, &FspFsvrtDeviceClassGuid,
&FsvrtDeviceObject);
if (NT_SUCCESS(Result))
{
#pragma prefast(suppress:28175, "We are a filesystem: ok to access SectorSize")
FsvrtDeviceObject->SectorSize = VolumeParams.SectorSize;
FsvrtDeviceExtension = FspFsvrtDeviceExtension(FsvrtDeviceObject);
FsvrtDeviceExtension->FsctlDeviceObject = DeviceObject;
FsvrtDeviceExtension->VolumeParams = VolumeParams;
RtlCopyMemory(FsvrtDeviceExtension->SecurityDescriptorBuf,
SecurityDescriptorBuf, SecurityDescriptorSize);
FspDeviceInitComplete(FsvrtDeviceObject);
Irp->IoStatus.Information = DeviceName.Length + sizeof(WCHAR);
FspFsctlDeviceVolumeCreated(DeviceObject);
}
}
finally
{
ExReleaseResourceLite(&FsctlDeviceExtension->Base.Resource);
}
/* free the temporary security descriptor */
if (0 != SecurityDescriptorBuf)
FspFree(SecurityDescriptorBuf);
return Result;
}
static NTSTATUS FspFsctlMountVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result;
FSP_FSCTL_DEVICE_EXTENSION *FsctlDeviceExtension = FspFsctlDeviceExtension(DeviceObject);
ExAcquireResourceExclusiveLite(&FsctlDeviceExtension->Base.Resource, TRUE);
try
{
PDEVICE_OBJECT *DeviceObjects = 0;
ULONG DeviceObjectCount = 0;
PVPB Vpb = IrpSp->Parameters.MountVolume.Vpb;
PDEVICE_OBJECT FsvrtDeviceObject = IrpSp->Parameters.MountVolume.DeviceObject;
PDEVICE_OBJECT FsvolDeviceObject;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =
FspFsvrtDeviceExtension(FsvrtDeviceObject);
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension;
/* check the passed in volume object; it must be one of our own and not marked Deleted */
Result = FspDeviceCopyList(&DeviceObjects, &DeviceObjectCount);
if (NT_SUCCESS(Result))
{
Result = STATUS_UNRECOGNIZED_VOLUME;
for (ULONG i = 0; DeviceObjectCount > i; i++)
if (DeviceObjects[i] == FsvrtDeviceObject)
{
if (FspDeviceRetain(FsvrtDeviceObject))
{
if (!FsvrtDeviceExtension->Deleted &&
FILE_DEVICE_VIRTUAL_DISK == FsvrtDeviceObject->DeviceType)
Result = STATUS_SUCCESS;
else
FspDeviceRelease(FsvrtDeviceObject);
}
break;
}
FspDeviceDeleteList(DeviceObjects, DeviceObjectCount);
}
if (!NT_SUCCESS(Result))
goto exit;
/* create the file system device object */
Result = FspDeviceCreate(FspFsvolDeviceExtensionKind, 0,
DeviceObject->DeviceType,
&FsvolDeviceObject);
if (NT_SUCCESS(Result))
{
/*
* Reference the virtual volume device so that it will not go away while the
* file system device object is alive!
*/
ObReferenceObject(FsvrtDeviceObject);
#pragma prefast(suppress:28175, "We are a filesystem: ok to access SectorSize")
FsvolDeviceObject->SectorSize = FsvrtDeviceExtension->VolumeParams.SectorSize;
FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
FsvolDeviceExtension->FsvrtDeviceObject = FsvrtDeviceObject;
FsvrtDeviceExtension->FsvolDeviceObject = FsvolDeviceObject;
FspDeviceInitComplete(FsvolDeviceObject);
Vpb->DeviceObject = FsvolDeviceObject;
Vpb->SerialNumber = FsvrtDeviceExtension->VolumeParams.SerialNumber;
Irp->IoStatus.Information = 0;
}
FspDeviceRelease(FsvrtDeviceObject);
exit:;
}
finally
{
ExReleaseResourceLite(&FsctlDeviceExtension->Base.Resource);
}
return Result;
}
typedef struct
{
PDEVICE_OBJECT FsvolDeviceObject;
PVPB OldVpb;
FSP_WORK_ITEM_WITH_DELAY WorkItemWithDelay;
} FSP_FSVRT_DELETE_VOLUME_WORK_ITEM;
static NTSTATUS FspFsvrtDeleteVolume(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(DeviceObject);
FSP_FSCTL_DEVICE_EXTENSION *FsctlDeviceExtension =
FspFsctlDeviceExtension(FsvrtDeviceExtension->FsctlDeviceObject);
ExAcquireResourceExclusiveLite(&FsctlDeviceExtension->Base.Resource, TRUE);
try
{
PDEVICE_OBJECT FsctlDeviceObject = FsvrtDeviceExtension->FsctlDeviceObject;
PDEVICE_OBJECT FsvolDeviceObject = FsvrtDeviceExtension->FsvolDeviceObject;
PVPB OldVpb;
BOOLEAN DeleteVpb = FALSE;
BOOLEAN DeleteDelayed = FALSE;
LARGE_INTEGER DelayTimeout;
FSP_FSVRT_DELETE_VOLUME_WORK_ITEM *WorkItem = 0;
KIRQL Irql;
/* access check */
Result = FspSecuritySubjectContextAccessCheck(
FsvrtDeviceExtension->SecurityDescriptorBuf, FILE_WRITE_DATA, Irp->RequestorMode);
if (!NT_SUCCESS(Result))
goto exit;
/* pre-allocate a work item in case we need it for delayed delete */
WorkItem = FspAllocNonPaged(sizeof *WorkItem);
if (0 == WorkItem)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
/* mark the virtual volume device as deleted */
FsvrtDeviceExtension->Deleted = TRUE;
/* stop the I/O queue */
FspIoqStop(&FsvrtDeviceExtension->Ioq);
/* swap the preallocated VPB */
#pragma prefast(push)
#pragma prefast(disable:28175, "We are a filesystem: ok to access Vpb")
IoAcquireVpbSpinLock(&Irql);
OldVpb = DeviceObject->Vpb;
if (0 != OldVpb && 0 != FsvrtDeviceExtension->SwapVpb)
{
DeviceObject->Vpb = FsvrtDeviceExtension->SwapVpb;
DeviceObject->Vpb->Size = sizeof *DeviceObject->Vpb;
DeviceObject->Vpb->Type = IO_TYPE_VPB;
DeviceObject->Vpb->Flags = FlagOn(OldVpb->Flags, VPB_REMOVE_PENDING);
DeviceObject->Vpb->RealDevice = OldVpb->RealDevice;
DeviceObject->Vpb->RealDevice->Vpb = DeviceObject->Vpb;
FsvrtDeviceExtension->SwapVpb = 0;
DeleteVpb = 0 == OldVpb->ReferenceCount;
DeleteDelayed = !DeleteVpb && 0 != FsvolDeviceObject;
if (DeleteDelayed)
/* keep VPB around for delayed delete */
OldVpb->ReferenceCount++;
}
IoReleaseVpbSpinLock(Irql);
if (DeleteDelayed)
/* keep fsvol around for delayed delete */
FspDeviceRetain(FsvolDeviceObject);
else if (DeleteVpb)
FspFreeExternal(OldVpb);
#pragma prefast(pop)
/* release the file system device and virtual volume objects */
FsvrtDeviceExtension->FsvolDeviceObject = 0;
if (0 != FsvolDeviceObject)
FspDeviceRelease(FsvolDeviceObject);
FspDeviceRelease(DeviceObject);
FspFsctlDeviceVolumeDeleted(FsctlDeviceObject);
/* are we doing delayed delete of VPB and fsvol? */
if (DeleteDelayed)
{
DelayTimeout.QuadPart = 300/*ms*/ * -10000;
WorkItem->FsvolDeviceObject = FsvolDeviceObject;
WorkItem->OldVpb = OldVpb;
FspInitializeWorkItemWithDelay(&WorkItem->WorkItemWithDelay,
FspFsvrtDeleteVolumeDelayed, WorkItem);
FspQueueWorkItemWithDelay(&WorkItem->WorkItemWithDelay, DelayTimeout);
WorkItem = 0;
}
Result = STATUS_SUCCESS;
exit:
if (0 != WorkItem)
FspFree(WorkItem);
}
finally
{
ExReleaseResourceLite(&FsctlDeviceExtension->Base.Resource);
}
return Result;
}
static VOID FspFsvrtDeleteVolumeDelayed(PVOID Context)
{
PAGED_CODE();
FSP_FSVRT_DELETE_VOLUME_WORK_ITEM *WorkItem = Context;
BOOLEAN DeleteVpb = FALSE;
LARGE_INTEGER DelayTimeout;
KIRQL Irql;
IoAcquireVpbSpinLock(&Irql);
ASSERT(0 != WorkItem->OldVpb->ReferenceCount);
DeleteVpb = 1 == WorkItem->OldVpb->ReferenceCount;
if (DeleteVpb)
WorkItem->OldVpb->ReferenceCount = 0;
IoReleaseVpbSpinLock(Irql);
if (DeleteVpb)
{
FspFreeExternal(WorkItem->OldVpb);
FspDeviceRelease(WorkItem->FsvolDeviceObject);
FspFree(WorkItem);
}
else
{
DelayTimeout.QuadPart = 300/*ms*/ * -10000;
FspQueueWorkItemWithDelay(&WorkItem->WorkItemWithDelay, DelayTimeout);
}
}
static NTSTATUS FspFsvrtTransact(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
/* check parameters */
ULONG InputBufferLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
ULONG OutputBufferLength = IrpSp->Parameters.FileSystemControl.OutputBufferLength;
PVOID SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
if (0 == SystemBuffer ||
(0 != InputBufferLength &&
FSP_FSCTL_DEFAULT_ALIGN_UP(sizeof(FSP_FSCTL_TRANSACT_RSP)) > InputBufferLength))
return STATUS_INVALID_PARAMETER;
if (FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMIN > OutputBufferLength)
return STATUS_BUFFER_TOO_SMALL;
NTSTATUS Result;
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension = FspFsvrtDeviceExtension(DeviceObject);
PUINT8 SystemBufferEnd;
FSP_FSCTL_TRANSACT_RSP *Response, *NextResponse;
FSP_FSCTL_TRANSACT_REQ *Request, *PendingIrpRequest;
PIRP ProcessIrp, PendingIrp;
LARGE_INTEGER Timeout;
/* access check */
Result = FspSecuritySubjectContextAccessCheck(
FsvrtDeviceExtension->SecurityDescriptorBuf, FILE_WRITE_DATA, Irp->RequestorMode);
if (!NT_SUCCESS(Result))
return Result;
/* process any user-mode file system responses */
Response = SystemBuffer;
SystemBufferEnd = (PUINT8)SystemBuffer + InputBufferLength;
for (;;)
{
NextResponse = FspFsctlTransactConsumeResponse(Response, SystemBufferEnd);
if (0 == NextResponse)
break;
ProcessIrp = FspIoqEndProcessingIrp(&FsvrtDeviceExtension->Ioq, (UINT_PTR)Response->Hint);
if (0 == ProcessIrp)
/* either IRP was canceled or a bogus Hint was provided */
continue;
FspIopDispatchComplete(ProcessIrp, Response);
Response = NextResponse;
}
/* wait for an IRP to arrive */
KeQuerySystemTime(&Timeout);
Timeout.QuadPart += FsvrtDeviceExtension->VolumeParams.TransactTimeout * 10000;
/* convert millis to nanos and add to absolute time */
while (0 == (PendingIrp = FspIoqNextPendingIrp(&FsvrtDeviceExtension->Ioq, &Timeout)))
{
if (FspIoqStopped(&FsvrtDeviceExtension->Ioq))
return STATUS_CANCELLED;
}
if (FspIoqTimeout == PendingIrp)
{
Irp->IoStatus.Information = 0;
return STATUS_SUCCESS;
}
/* send any pending IRP's to the user-mode file system */
Request = SystemBuffer;
SystemBufferEnd = (PUINT8)SystemBuffer + OutputBufferLength;
ASSERT(FspFsctlTransactCanProduceRequest(Request, SystemBufferEnd));
for (;;)
{
PendingIrpRequest = FspIrpRequest(PendingIrp);
Result = FspIopDispatchPrepare(PendingIrp, PendingIrpRequest);
if (!NT_SUCCESS(Result))
FspIopCompleteIrp(PendingIrp, Result);
else
{
RtlCopyMemory(Request, PendingIrpRequest, PendingIrpRequest->Size);
Request = FspFsctlTransactProduceRequest(Request, PendingIrpRequest->Size);
if (!FspIoqStartProcessingIrp(&FsvrtDeviceExtension->Ioq, PendingIrp))
{
/*
* This can only happen if the Ioq was stopped. Abandon everything
* and return STATUS_CANCELLED. Any IRP's in the Pending and Process
* queues of the Ioq will be cancelled during FspIoqStop(). We must
* also cancel the PendingIrp we have in our hands.
*/
ASSERT(FspIoqStopped(&FsvrtDeviceExtension->Ioq));
FspIopCompleteIrp(PendingIrp, STATUS_CANCELLED);
return STATUS_CANCELLED;
}
/* check that we have enough space before pulling the next pending IRP off the queue */
if (!FspFsctlTransactCanProduceRequest(Request, SystemBufferEnd))
break;
}
PendingIrp = FspIoqNextPendingIrp(&FsvrtDeviceExtension->Ioq, 0);
if (0 == PendingIrp)
break;
}
Irp->IoStatus.Information = (PUINT8)Request - (PUINT8)SystemBuffer;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsctlFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
switch (IrpSp->MinorFunction)
{
case IRP_MN_USER_FS_REQUEST:
switch (IrpSp->Parameters.FileSystemControl.FsControlCode)
{
case FSP_FSCTL_CREATE:
Result = FspFsctlCreateVolume(DeviceObject, Irp, IrpSp);
break;
}
break;
case IRP_MN_MOUNT_VOLUME:
Result = FspFsctlMountVolume(DeviceObject, Irp, IrpSp);
break;
#if 0
case IRP_MN_VERIFY_VOLUME:
break;
#endif
}
return Result;
}
static NTSTATUS FspFsvrtFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
switch (IrpSp->MinorFunction)
{
case IRP_MN_USER_FS_REQUEST:
switch (IrpSp->Parameters.FileSystemControl.FsControlCode)
{
case FSP_FSCTL_DELETE:
Result = FspFsvrtDeleteVolume(DeviceObject, Irp, IrpSp);
break;
case FSP_FSCTL_TRANSACT:
Result = FspFsvrtTransact(DeviceObject, Irp, IrpSp);
break;
}
break;
}
return Result;
}
static NTSTATUS FspFsvolFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
switch (IrpSp->MinorFunction)
{
case IRP_MN_USER_FS_REQUEST:
break;
}
return Result;
}
NTSTATUS FspFileSystemControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
FSP_ENTER_MJ(PAGED_CODE());
ASSERT(IRP_MJ_FILE_SYSTEM_CONTROL == IrpSp->MajorFunction);
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
FSP_RETURN(Result = FspFsvolFileSystemControl(DeviceObject, Irp, IrpSp));
case FspFsvrtDeviceExtensionKind:
FSP_RETURN(Result = FspFsvrtFileSystemControl(DeviceObject, Irp, IrpSp));
case FspFsctlDeviceExtensionKind:
FSP_RETURN(Result = FspFsctlFileSystemControl(DeviceObject, Irp, IrpSp));
default:
FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
}
FSP_LEAVE_MJ(
"FileObject=%p%s%s",
IrpSp->FileObject,
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ? ", " : "",
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ?
IoctlCodeSym(IrpSp->Parameters.FileSystemControl.FsControlCode) : "");
}
VOID FspFileSystemControlComplete(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC(
"FileObject=%p%s%s",
IrpSp->FileObject,
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ? ", " : "",
IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction ?
IoctlCodeSym(IrpSp->Parameters.FileSystemControl.FsControlCode) : "");
}

0
src/sys/idevctl.c → src0/sys/idevctl.c
View File

0
src/sys/misc.c → src0/sys/misc.c
View File