Function Ext2MountVolume

Ext4Fsd/fsctl.c:2047–2276

}

NTSTATUS
Ext2MountVolume (IN PEXT2_IRP_CONTEXT IrpContext)
{
    PDEVICE_OBJECT              MainDeviceObject;
    BOOLEAN                     GlobalDataResourceAcquired = FALSE;
    PIRP                        Irp;
    PIO_STACK_LOCATION          IoStackLocation;
    PDEVICE_OBJECT              TargetDeviceObject;
    NTSTATUS                    Status = STATUS_UNRECOGNIZED_VOLUME;
    PDEVICE_OBJECT              VolumeDeviceObject = NULL;
    PEXT2_VCB                   Vcb = NULL, OldVcb = NULL;
    PVPB                        OldVpb = NULL, Vpb = NULL;
    PEXT2_SUPER_BLOCK           Ext2Sb = NULL;
    ULONG                       dwBytes;
    DISK_GEOMETRY               DiskGeometry;

    __try {

        ASSERT(IrpContext != NULL);
        ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
               (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));

        MainDeviceObject = IrpContext->DeviceObject;

        //
        //  Make sure we can wait.
        //

        SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);

        //
        // This request is only allowed on the main device object
        //
        if (!IsExt2FsDevice(MainDeviceObject)) {
            Status = STATUS_INVALID_DEVICE_REQUEST;
            __leave;
        }

        if (IsFlagOn(Ext2Global->Flags, EXT2_UNLOAD_PENDING)) {
            Status = STATUS_UNRECOGNIZED_VOLUME;
            __leave;
        }

#if 0
        if (IrpContext->RealDevice->Size >= sizeof(ULONG) + sizeof(DEVICE_OBJECT) &&
                *((PULONG)IrpContext->RealDevice->DeviceExtension) == 'DSSA') {
        } else {
            Status = STATUS_UNRECOGNIZED_VOLUME;
            __leave;
        }
#endif

        Irp = IrpContext->Irp;
        IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
        TargetDeviceObject =
            IoStackLocation->Parameters.MountVolume.DeviceObject;

        dwBytes = sizeof(DISK_GEOMETRY);