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sys: FSP_FSCTL_TRANSACT/FSP_FSCTL_TRANSACT_BATCH

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This commit is contained in:
Bill Zissimopoulos
2016-02-15 15:07:05 -08:00
parent 440f66a786
commit d1fe27f996
8 changed files with 31 additions and 14 deletions
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14
src/sys/volume.c
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@ -496,11 +496,14 @@ NTSTATUS FspVolumeTransact(
ASSERT(IRP_MJ_FILE_SYSTEM_CONTROL == IrpSp->MajorFunction);
ASSERT(IRP_MN_USER_FS_REQUEST == IrpSp->MinorFunction);
ASSERT(FSP_FSCTL_TRANSACT == IrpSp->Parameters.FileSystemControl.FsControlCode);
ASSERT(
FSP_FSCTL_TRANSACT == IrpSp->Parameters.FileSystemControl.FsControlCode ||
FSP_FSCTL_TRANSACT_BATCH == IrpSp->Parameters.FileSystemControl.FsControlCode);
ASSERT(0 != IrpSp->FileObject->FsContext2);
/* check parameters */
PDEVICE_OBJECT FsvolDeviceObject = IrpSp->FileObject->FsContext2;
ULONG ControlCode = IrpSp->Parameters.FileSystemControl.FsControlCode;
ULONG InputBufferLength = IrpSp->Parameters.FileSystemControl.InputBufferLength;
ULONG OutputBufferLength = IrpSp->Parameters.FileSystemControl.OutputBufferLength;
PVOID SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
@ -509,7 +512,10 @@ NTSTATUS FspVolumeTransact(
FSP_FSCTL_DEFAULT_ALIGN_UP(sizeof(FSP_FSCTL_TRANSACT_RSP)) > InputBufferLength)
return STATUS_INVALID_PARAMETER;
if (0 != OutputBufferLength &&
FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMIN > OutputBufferLength)
((FSP_FSCTL_TRANSACT == ControlCode &&
FSP_FSCTL_TRANSACT_REQ_SIZEMAX > OutputBufferLength) ||
(FSP_FSCTL_TRANSACT_BATCH == ControlCode &&
FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMIN > OutputBufferLength)))
return STATUS_BUFFER_TOO_SMALL;
if (!FspDeviceReference(FsvolDeviceObject))
@ -645,6 +651,10 @@ NTSTATUS FspVolumeTransact(
goto exit;
}
/* are we doing single request or batch mode? */
if (FSP_FSCTL_TRANSACT == ControlCode)
break;
/* check that we have enough space before pulling the next pending IRP off the queue */
if (!FspFsctlTransactCanProduceRequest(Request, BufferEnd))
break;