Norman Feske 2c8beb462f file-system session: root dir via session label
This patch changes the way of how the client-selected sub directory is
communicated to the server. The former opaque session argument is now
passed as last label element, which allows for the flexible tweaking
of this argument by init's session-routing and label-rewriting
mechansims. In particular, it alleviates the need for creating chroot
component instances.

This change requires the following four adaptations at the
configuration level:

- Each file-system session request must now carry a path starting
  with / as last session arguments. Hence, <vfs> <fs> nodes that
  feature a 'label' attributes must extend the attribute value
  with " -> /". For <fs> nodes with no label attribute, "/" is
  used as last label argument by default.

- For matching session-routing rules at init's configuration,
  the matching of full labels should be replaced by 'label_prefix'
  matches, excluding the last (path) argument.

- Wherever a label of a file-system session is rewritten by using
  init's 'label' attribute of a <parent> or <child> target node,
  the new attribute 'identity' should be used instead. This replaces
  the identity part of the label while preserving the client's
  directory argument.

- Analogously to the matching of session-routing rules, server-side
  policy-selection rules that formerly matched a concrete 'label'
  must be changed to match a 'label_prefix' instead.

As a good practice, 'label_prefix' values should end with " ->" if
possible, which clearly delimits the identity part of the label
used by the matching.

Issue #5445
2025-02-24 16:39:20 +01:00
..
2024-08-27 15:33:32 +02:00
2025-02-24 16:39:20 +01:00
2025-02-24 16:39:20 +01:00

               ================================
               Genode support for x86-based PCs
               ================================


This repository complements the Genode OS framework (https://genode.org) with
the board support needed to use Genode on devices based on x86 PCs.

License
-------

Genode-specific code is provided under Genode's regular open-source license,
which is AGPLv3 + open-source linking exception. This code is also available
under a commercial license offered by Genode Labs.

For code ported from other projects - e.g., device drivers ported from the
Linux kernel - the license of the originating upstream project applies.

Please refer to the individual file headers for detailed information.