Add a default policy for custom directories and files to constrain what
users can do. The intention is to ensure that directories and files can
be created only in `/etc` and also that none of the important
configuration files can be overwritten by this customization.
Add the policy validation to all distro implementation.
Signed-off-by: Tomáš Hozza <thozza@redhat.com>
Move the `CheckMountpoints()` implementation to `blueprint` package,
since it does not operate on any data structures from the `disk`.
Move the default mountpoint allow list policy definition to the
`pathpolicy` package.
Signed-off-by: Tomáš Hozza <thozza@redhat.com>
The `PathPolicies` implements a generic concept that can be fit on more
use cases than just mountpoints. Another one would be a policy for
creating custom files and directories in the image. Having the
implementation in the `disk` package and using data structures from the
`disk` and `blueprint` packages makes it impossible to use it for any
additional BP customization due to a circular dependencies that always
occurs.
Split out the implementation into a separate package `pathpolicy` as the
first step.
Signed-off-by: Tomáš Hozza <thozza@redhat.com>
