NOTE:
This is one of the technical documents describing a component of
Coda -- this document describes the client kernel-Venus interface.
For more information:
http://www.coda.cs.cmu.edu
For user level software needed to run Coda:
ftp://ftp.coda.cs.cmu.edu
To run Coda you need to get a user level cache manager for the client,
named Venus, as well as tools to manipulate ACLs, to log in, etc. The
client needs to have the Coda filesystem selected in the kernel
configuration.
The server needs a user level server and at present does not depend on
kernel support.
The Venus kernel interface
Peter J. Braam
v1.0, Nov 9, 1997
This document describes the communication between Venus and kernel
level filesystem code needed for the operation of the Coda file sys-
tem. This document version is meant to describe the current interface
(version 1.0) as well as improvements we envisage.
______________________________________________________________________
Table of Contents
1. Introduction
2. Servicing Coda filesystem calls
3. The message layer
3.1 Implementation details
4. The interface at the call level
4.1 Data structures shared by the kernel and Venus
4.2 The pioctl interface
4.3 root
4.4 lookup
4.5 getattr
4.6 setattr
4.7 access
4.8 create
4.9 mkdir
4.10 link
4.11 symlink
4.12 remove
4.13 rmdir
4.14 readlink
4.15 open
4.16 close
4.17 ioctl
4.18 rename
4.19 readdir
4.20 vget
4.21 fsync
4.22 inactive
4.23 rdwr
4.24 odymount
4.25 ody_lookup
4.26 ody_expand
4.27 prefetch
4.28 signal
5. The minicache and downcalls
5.1 INVALIDATE
5.2 FLUSH
5.3 PURGEUSER
5.4 ZAPFILE
5.5 ZAPDIR
5.6 ZAPVNODE
5.7 PURGEFID
5.8 REPLACE
6. Initialization and cleanup
6.1 Requirements
______________________________________________________________________
0wpage
11.. IInnttrroodduuccttiioonn
A key component in the Coda Distributed File System is the cache
manager, _V_e_n_u
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