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sys: IRP_MJ_CREATE

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This commit is contained in:
Bill Zissimopoulos 2016-01-07 21:54:18 -08:00
parent a382db8b01
commit 8c7f790805
4 changed files with 18 additions and 24 deletions
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17
src/sys/create.c
View File

@ -86,6 +86,7 @@ static NTSTATUS FspFsvolCreate(
if ((0 == RelatedFileObject || RelatedFileObject->FsContext) && 0 == FileName.Length)
{
if (0 != FsvolDeviceExtension->FsvrtDeviceObject)
#pragma prefast(disable:28175, "We are a filesystem: ok to access Vpb")
FileObject->Vpb = FsvolDeviceExtension->FsvrtDeviceObject->Vpb;
Irp->IoStatus.Information = FILE_OPENED;
@ -242,7 +243,7 @@ static NTSTATUS FspFsvolCreate(
FspFsvolCreateRequestFini, &Request);
if (!NT_SUCCESS(Result))
{
FspFileContextDelete(FsContext);
FspFileContextRelease(FsContext);
return Result;
}
@ -374,6 +375,7 @@ VOID FspFsvolCreateComplete(
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
FSP_FILE_CONTEXT *FsContext = FspIopRequestContext(Request, RequestFsContext);
FSP_FILE_CONTEXT *OpenedFsContext;
UNICODE_STRING ReparseFileName;
BOOLEAN DeleteOnClose;
@ -451,6 +453,7 @@ VOID FspFsvolCreateComplete(
/* set up the FileObject */
if (0 != FsvolDeviceExtension->FsvrtDeviceObject)
#pragma prefast(disable:28175, "We are a filesystem: ok to access Vpb")
FileObject->Vpb = FsvolDeviceExtension->FsvrtDeviceObject->Vpb;
FileObject->SectionObjectPointer = &FsContext->NonPaged->SectionObjectPointers;
FileObject->PrivateCacheMap = 0;
@ -460,11 +463,10 @@ VOID FspFsvolCreateComplete(
DeleteOnClose = BooleanFlagOn(Request->Req.Create.CreateOptions, FILE_DELETE_ON_CLOSE);
/* open the FsContext */
FsContext = FspFileContextOpen(FsContext, FileObject,
OpenedFsContext = FspFileContextOpen(FsContext, FileObject,
Response->Rsp.Create.Opened.GrantedAccess, IrpSp->Parameters.Create.ShareAccess,
&Result);
FspIopRequestContext(Request, RequestFsContext) = FsContext;
if (0 == FsContext)
if (0 == OpenedFsContext)
{
/* unable to open the FsContext; post a close Create2 request */
FspFsvolCreatePostClose(FsvolDeviceObject,
@ -473,9 +475,16 @@ VOID FspFsvolCreateComplete(
Response->Rsp.Create.Opened.UserContext2,
Result);
FspFileContextRelease(FsContext);
FSP_RETURN();
}
if (OpenedFsContext != FsContext)
FspFileContextRelease(FsContext);
FspIopRequestContext(Request, RequestFsContext) = FsContext = OpenedFsContext;
if (FILE_OPENED == Response->IoStatus.Information)
{
/*

14
src/sys/device.c
View File

@ -25,11 +25,7 @@ static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject);
static VOID FspFsvolDeviceFini(PDEVICE_OBJECT DeviceObject);
static IO_TIMER_ROUTINE FspFsvolDeviceTimerRoutine;
static WORKER_THREAD_ROUTINE FspFsvolDeviceExpirationRoutine;
_IRQL_raises_(APC_LEVEL)
_IRQL_saves_global_(OldIrql, DeviceObject)
VOID FspFsvolDeviceLockContextTable(PDEVICE_OBJECT DeviceObject);
_IRQL_requires_(APC_LEVEL)
_IRQL_restores_global_(OldIrql, DeviceObject)
VOID FspFsvolDeviceUnlockContextTable(PDEVICE_OBJECT DeviceObject);
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
@ -295,7 +291,7 @@ static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject)
FsvolDeviceExtension->InitDoneIoq = 1;
/* initialize our generic table */
ExInitializeFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
KeInitializeGuardedMutex(&FsvolDeviceExtension->GenericTableMutex);
RtlInitializeGenericTableAvl(&FsvolDeviceExtension->GenericTable,
FspFsvolDeviceCompareElement, FspFsvolDeviceAllocateElement, FspFsvolDeviceFreeElement, 0);
FsvolDeviceExtension->InitDoneGenTab = 1;
@ -412,24 +408,20 @@ static VOID FspFsvolDeviceExpirationRoutine(PVOID Context)
FspDeviceRelease(DeviceObject);
}
_IRQL_raises_(APC_LEVEL)
_IRQL_saves_global_(OldIrql, DeviceObject)
VOID FspFsvolDeviceLockContextTable(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ExAcquireFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
KeAcquireGuardedMutex(&FsvolDeviceExtension->GenericTableMutex);
}
_IRQL_requires_(APC_LEVEL)
_IRQL_restores_global_(OldIrql, DeviceObject)
VOID FspFsvolDeviceUnlockContextTable(PDEVICE_OBJECT DeviceObject)
{
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ExReleaseFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
KeReleaseGuardedMutex(&FsvolDeviceExtension->GenericTableMutex);
}
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier)

6
src/sys/driver.h
View File

@ -433,7 +433,7 @@ typedef struct
KSPIN_LOCK ExpirationLock;
WORK_QUEUE_ITEM ExpirationWorkItem;
BOOLEAN ExpirationInProgress;
FAST_MUTEX GenericTableFastMutex;
KGUARDED_MUTEX GenericTableMutex;
RTL_AVL_TABLE GenericTable;
PVOID GenericTableElementStorage;
UNICODE_STRING VolumeName;
@ -461,11 +461,7 @@ NTSTATUS FspDeviceInitialize(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceDelete(PDEVICE_OBJECT DeviceObject);
BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject);
_IRQL_raises_(APC_LEVEL)
_IRQL_saves_global_(OldIrql, DeviceObject)
VOID FspFsvolDeviceLockContextTable(PDEVICE_OBJECT DeviceObject);
_IRQL_requires_(APC_LEVEL)
_IRQL_restores_global_(OldIrql, DeviceObject)
VOID FspFsvolDeviceUnlockContextTable(PDEVICE_OBJECT DeviceObject);
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
PVOID FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,

5
src/sys/filectx.c
View File

@ -112,7 +112,7 @@ FSP_FILE_CONTEXT *FspFileContextOpen(FSP_FILE_CONTEXT *FsContext, PFILE_OBJECT F
* opening a prior FsContext that we found in the table.
*
* First check and update the share access. If successful then retain the
* prior FsContext for our caller and release the original FsContext.
* prior FsContext for our caller.
*/
ASSERT(OpenedFsContext != FsContext);
@ -150,9 +150,6 @@ FSP_FILE_CONTEXT *FspFileContextOpen(FSP_FILE_CONTEXT *FsContext, PFILE_OBJECT F
FspFsvolDeviceUnlockContextTable(FsvolDeviceObject);
if (!Inserted)
FspFileContextRelease(FsContext);
return OpenedFsContext;
}