Function Ext2UnlockVolume

Ext4Fsd/fsctl.c:240–292

}

NTSTATUS
Ext2UnlockVolume (
    IN PEXT2_IRP_CONTEXT IrpContext
)
{
    PIO_STACK_LOCATION IrpSp = NULL;
    PDEVICE_OBJECT  DeviceObject = NULL;
    PEXT2_VCB       Vcb = NULL;
    NTSTATUS        Status;
    BOOLEAN         VcbResourceAcquired = FALSE;

    __try {

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

        DeviceObject = IrpContext->DeviceObject;
        IrpSp = IoGetCurrentIrpStackLocation(IrpContext->Irp);

        //
        // This request is not allowed on the main device object
        //
        if (IsExt2FsDevice(DeviceObject)) {
            Status = STATUS_INVALID_PARAMETER;
            __leave;
        }

        Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
        ASSERT(Vcb != NULL);
        ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
               (Vcb->Identifier.Size == sizeof(EXT2_VCB)));

        ExAcquireResourceExclusiveLite(
            &Vcb->MainResource,
            TRUE );
        VcbResourceAcquired = TRUE;

        Status = Ext2UnlockVcb(Vcb, IrpSp->FileObject);

    } __finally {

        if (VcbResourceAcquired) {
            ExReleaseResourceLite(&Vcb->MainResource);
        }

        if (!IrpContext->ExceptionInProgress) {
            Ext2CompleteIrpContext(IrpContext,  Status);
        }
    }

    return Status;
}


NTSTATUS