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sys: FspFsvolCreateTryOpen

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This commit is contained in:
Bill Zissimopoulos 2016-01-20 15:47:00 -08:00
parent 12cec5dc22
commit b9ea2196c0
1 changed files with 39 additions and 39 deletions
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78
src/sys/create.c
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@ -14,9 +14,9 @@ static NTSTATUS FspFsvolCreate(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp); PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOPREP_DISPATCH FspFsvolCreatePrepare; FSP_IOPREP_DISPATCH FspFsvolCreatePrepare;
FSP_IOCMPL_DISPATCH FspFsvolCreateComplete; FSP_IOCMPL_DISPATCH FspFsvolCreateComplete;
static VOID FspFsvolCreatePostClose(FSP_FILE_DESC *FileDesc); static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, FSP_FSCTL_TRANSACT_REQ *Request,
static NTSTATUS FspFsvolCreateTryFlushImage(PIRP Irp, FSP_FSCTL_TRANSACT_REQ *Request,
FSP_FILE_NODE *FileNode, FSP_FILE_DESC *FileDesc, PFILE_OBJECT FileObject); FSP_FILE_NODE *FileNode, FSP_FILE_DESC *FileDesc, PFILE_OBJECT FileObject);
static VOID FspFsvolCreatePostClose(FSP_FILE_DESC *FileDesc);
static FSP_IOP_REQUEST_FINI FspFsvolCreateRequestFini; static FSP_IOP_REQUEST_FINI FspFsvolCreateRequestFini;
static FSP_IOP_REQUEST_FINI FspFsvolCreateReservedRequestFini; static FSP_IOP_REQUEST_FINI FspFsvolCreateReservedRequestFini;
static FSP_IOP_REQUEST_FINI FspFsvolCreateOverwriteRequestFini; static FSP_IOP_REQUEST_FINI FspFsvolCreateOverwriteRequestFini;
@ -28,8 +28,8 @@ FSP_DRIVER_DISPATCH FspCreate;
#pragma alloc_text(PAGE, FspFsvolCreate) #pragma alloc_text(PAGE, FspFsvolCreate)
#pragma alloc_text(PAGE, FspFsvolCreatePrepare) #pragma alloc_text(PAGE, FspFsvolCreatePrepare)
#pragma alloc_text(PAGE, FspFsvolCreateComplete) #pragma alloc_text(PAGE, FspFsvolCreateComplete)
#pragma alloc_text(PAGE, FspFsvolCreateTryOpen)
#pragma alloc_text(PAGE, FspFsvolCreatePostClose) #pragma alloc_text(PAGE, FspFsvolCreatePostClose)
#pragma alloc_text(PAGE, FspFsvolCreateTryFlushImage)
#pragma alloc_text(PAGE, FspFsvolCreateRequestFini) #pragma alloc_text(PAGE, FspFsvolCreateRequestFini)
#pragma alloc_text(PAGE, FspFsvolCreateReservedRequestFini) #pragma alloc_text(PAGE, FspFsvolCreateReservedRequestFini)
#pragma alloc_text(PAGE, FspFsvolCreateOverwriteRequestFini) #pragma alloc_text(PAGE, FspFsvolCreateOverwriteRequestFini)
@ -362,7 +362,7 @@ NTSTATUS FspFsvolCreatePrepare(
FileNode = FileDesc->FileNode; FileNode = FileDesc->FileNode;
FileObject = FspIopRequestContext(Request, RequestFileObject); FileObject = FspIopRequestContext(Request, RequestFileObject);
Result = FspFsvolCreateTryFlushImage(Irp, Request, FileNode, FileDesc, FileObject); Result = FspFsvolCreateTryOpen(Irp, Request, FileNode, FileDesc, FileObject);
if (STATUS_PENDING == Result) if (STATUS_PENDING == Result)
return Result; return Result;
else else
@ -593,7 +593,7 @@ VOID FspFsvolCreateComplete(
if (FlagOn(Response->Rsp.Create.Opened.GrantedAccess, FILE_WRITE_DATA) || if (FlagOn(Response->Rsp.Create.Opened.GrantedAccess, FILE_WRITE_DATA) ||
DeleteOnClose) DeleteOnClose)
{ {
Result = FspFsvolCreateTryFlushImage(Irp, 0, FileNode, FileDesc, FileObject); Result = FspFsvolCreateTryOpen(Irp, 0, FileNode, FileDesc, FileObject);
if (STATUS_PENDING == Result || !NT_SUCCESS(Result)) if (STATUS_PENDING == Result || !NT_SUCCESS(Result))
FSP_RETURN(); FSP_RETURN();
} }
@ -686,40 +686,7 @@ VOID FspFsvolCreateComplete(
IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName); IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName);
} }
static VOID FspFsvolCreatePostClose(FSP_FILE_DESC *FileDesc) static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, FSP_FSCTL_TRANSACT_REQ *Request,
{
PAGED_CODE();
FSP_FILE_NODE *FileNode = FileDesc->FileNode;
PDEVICE_OBJECT FsvolDeviceObject = FileNode->FsvolDeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request; MustSucceed because we cannot fail */
FspIopCreateRequestMustSucceed(0,
FsvolDeviceExtension->VolumeParams.FileNameRequired ? &FileNode->FileName : 0,
0, &Request);
/* populate the Close request */
Request->Kind = FspFsctlTransactCloseKind;
Request->Req.Close.UserContext = FileNode->UserContext;
Request->Req.Close.UserContext2 = FileDesc->UserContext2;
/*
* Post as a BestEffort work request. This allows us to complete our own IRP
* and return immediately.
*/
FspIopPostWorkRequestBestEffort(FsvolDeviceObject, Request);
/*
* Note that it is still possible for this request to not be delivered,
* if the volume device Ioq is stopped. But such failures are benign
* from our perspective, because they mean that the file system is going
* away and should correctly tear things down.
*/
}
static NTSTATUS FspFsvolCreateTryFlushImage(PIRP Irp, FSP_FSCTL_TRANSACT_REQ *Request,
FSP_FILE_NODE *FileNode, FSP_FILE_DESC *FileDesc, PFILE_OBJECT FileObject) FSP_FILE_NODE *FileNode, FSP_FILE_DESC *FileDesc, PFILE_OBJECT FileObject)
{ {
PAGED_CODE(); PAGED_CODE();
@ -783,6 +750,39 @@ static NTSTATUS FspFsvolCreateTryFlushImage(PIRP Irp, FSP_FSCTL_TRANSACT_REQ *Re
return STATUS_SUCCESS; return STATUS_SUCCESS;
} }
static VOID FspFsvolCreatePostClose(FSP_FILE_DESC *FileDesc)
{
PAGED_CODE();
FSP_FILE_NODE *FileNode = FileDesc->FileNode;
PDEVICE_OBJECT FsvolDeviceObject = FileNode->FsvolDeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request; MustSucceed because we cannot fail */
FspIopCreateRequestMustSucceed(0,
FsvolDeviceExtension->VolumeParams.FileNameRequired ? &FileNode->FileName : 0,
0, &Request);
/* populate the Close request */
Request->Kind = FspFsctlTransactCloseKind;
Request->Req.Close.UserContext = FileNode->UserContext;
Request->Req.Close.UserContext2 = FileDesc->UserContext2;
/*
* Post as a BestEffort work request. This allows us to complete our own IRP
* and return immediately.
*/
FspIopPostWorkRequestBestEffort(FsvolDeviceObject, Request);
/*
* Note that it is still possible for this request to not be delivered,
* if the volume device Ioq is stopped. But such failures are benign
* from our perspective, because they mean that the file system is going
* away and should correctly tear things down.
*/
}
static VOID FspFsvolCreateRequestFini(PVOID Context[3]) static VOID FspFsvolCreateRequestFini(PVOID Context[3])
{ {
PAGED_CODE(); PAGED_CODE();