CFS Resources

This document, authored by David Lomartire in 1984, details the resource management system for Cluster File System (CFS) on VAX/VMS. It describes the internal implementation of various tokens and resource managers including:

• File resources: Managing file open and access tokens.
• Directory locks: Managing directory locking and allocation.
• Structures: Managing structure mounting and serial number registration.
• BAT block locks: Exclusive locks for structural BAT blocks.
• ENQ/DEQ: Temporary exclusive resources for local file queuing.

Each section outlines the routines used for acquiring and releasing these resources, detailing the relevant callback routines and state transitions within the system's resource blocks.