OSF/1 Internals

This document, Volume II of the OSF/1 Internals, serves as technical training material for the staff of the Digital Equipment Corporation. It details the architecture and implementation of several key kernel subsystems. Specifically, it covers:

• File Systems: Discussion of the virtual file system (VFS) interface, buffer cache, path searching, and specific implementations including S5, UFS, and NFS.
• Device Drivers and Terminal I/O: Explanation of the device driver interface, special files, terminal handling, and line disciplines.
• Streams: Concepts, message flow, and implementation details of the streams framework.
• Sockets: An overview of networking via the socket model, including mbufs and their use.
• Logical Volume Manager (LVM): Details on physical volume management, mirroring, and bad-sector remapping.
• Loader: Information on dynamic loading, symbol resolution, and shared libraries.
• Security: A breakdown of security policies, auditing, access control (DAC and MAC), and authorization/privileges.