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sys: FastIo: read/write implementation

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This commit is contained in:
Bill Zissimopoulos
2022-03-20 20:31:54 +00:00
parent 00d4aba946
commit 20680fa5b5
7 changed files with 311 additions and 5 deletions
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26
src/sys/mup.c
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@ -43,6 +43,8 @@ NTSTATUS FspMupRegister(
PDEVICE_OBJECT FsmupDeviceObject, PDEVICE_OBJECT FsvolDeviceObject);
VOID FspMupUnregister(
PDEVICE_OBJECT FsmupDeviceObject, PDEVICE_OBJECT FsvolDeviceObject);
PDEVICE_OBJECT FspMupGetFsvolDeviceObject(
PFILE_OBJECT FileObject);
NTSTATUS FspMupHandleIrp(
PDEVICE_OBJECT FsmupDeviceObject, PIRP Irp);
static NTSTATUS FspMupRedirQueryPathEx(
@ -52,6 +54,7 @@ static NTSTATUS FspMupRedirQueryPathEx(
#pragma alloc_text(PAGE, FspMupGetClassName)
#pragma alloc_text(PAGE, FspMupRegister)
#pragma alloc_text(PAGE, FspMupUnregister)
#pragma alloc_text(PAGE, FspMupGetFsvolDeviceObject)
#pragma alloc_text(PAGE, FspMupHandleIrp)
#pragma alloc_text(PAGE, FspMupRedirQueryPathEx)
#endif
@ -191,6 +194,27 @@ VOID FspMupUnregister(
ExReleaseResourceLite(&FsmupDeviceExtension->PrefixTableResource);
}
PDEVICE_OBJECT FspMupGetFsvolDeviceObject(
PFILE_OBJECT FileObject)
{
PAGED_CODE();
PDEVICE_OBJECT FsvolDeviceObject = 0;
ASSERT(0 != FileObject);
if (FspFileNodeIsValid(FileObject->FsContext))
FsvolDeviceObject = ((FSP_FILE_NODE*)FileObject->FsContext)->FsvolDeviceObject;
else if (0 != FileObject->FsContext2 &&
#pragma prefast(disable:28175, "We are a filesystem: ok to access DeviceObject->Type")
IO_TYPE_DEVICE == ((PDEVICE_OBJECT)FileObject->FsContext2)->Type &&
0 != ((PDEVICE_OBJECT)FileObject->FsContext2)->DeviceExtension &&
FspFsvolDeviceExtensionKind == FspDeviceExtension((PDEVICE_OBJECT)FileObject->FsContext2)->Kind)
FsvolDeviceObject = (PDEVICE_OBJECT)FileObject->FsContext2;
return FsvolDeviceObject;
}
NTSTATUS FspMupHandleIrp(
PDEVICE_OBJECT FsmupDeviceObject, PIRP Irp)
{
@ -276,7 +300,7 @@ NTSTATUS FspMupHandleIrp(
FsvolDeviceObject = ((FSP_FILE_NODE *)FileObject->FsContext)->FsvolDeviceObject;
else if (0 != FileObject->FsContext2 &&
#pragma prefast(disable:28175, "We are a filesystem: ok to access DeviceObject->Type")
3 == ((PDEVICE_OBJECT)FileObject->FsContext2)->Type &&
IO_TYPE_DEVICE == ((PDEVICE_OBJECT)FileObject->FsContext2)->Type &&
0 != ((PDEVICE_OBJECT)FileObject->FsContext2)->DeviceExtension &&
FspFsvolDeviceExtensionKind == FspDeviceExtension((PDEVICE_OBJECT)FileObject->FsContext2)->Kind)
FsvolDeviceObject = (PDEVICE_OBJECT)FileObject->FsContext2;