Organization of the client

The kernel module and the cache manager

Like every filesystem a computer enabled to use the Coda filesystem needs kernel support to access Coda files. Coda's kernel support is minimal and works in conjunction with the userspace cache manager Venus. User requests enter the kernel, which will either reply directly or ask the cache manager venus to assist in service.

Typically the kernel code is in a kernel module, which is either loaded at boot time or dynamically loaded when Venus is started. Venus will even mount the Coda filesystem on /coda.


To manipulate ACL's, the cache, volume mountpoints and possibly the network behaviour of a Coda client a variety of small utilities is provided. The most important one is cfs.

There is also a clog to authenticate to the Coda authentication server. The codacon allows one to monitor the operatoin of the cache manager, and cmon gives summary information about a list of servers.