Sharing and Mounting Files in Trusted Extensions

Trusted Extensions software supports the same file systems and file system management commands as the Oracle Solaris OS. Trusted Extensions adds the ability for a non-global zone to share files. In addition, Trusted Extensions attaches a unique label to every non-global zone. All the files and directories that belong to that zone are mounted at the label of the zone. Any shared file systems that belong to other zones or to NFS servers are mounted at the label of the owner. Trusted Extensions prevents any mounts that would violate the mandatory access control (MAC) policies for labeling. For example, a zone's label must dominate all of its mounted file system labels, and only equally labeled file systems can be mounted with read/write permissions.