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Genode OS Framework
armcpluspluscppframeworkgenodegoahypervisorlinuxmicrokernelnovaobject-capabilitiesoperating-systemosdevriscvsculpt-ossel4virtualizationx86
d5b1d9466a
Whenever a domain looses all its interfaces or the link state of all attached interfaces is down at once, the domain potentially moves to another Ethernet segment and should therefore consider its ARP cache to be outdated. RFC 826 states that "... If a host moves, any connections initiated by that host will work, assuming its own address resolution table is cleared when it moves. ...". Therefore, this commit introduces clearing the ARP cache and the initially stated events. This commit was motivated by an issue with the PinePhone Modem and USB NIC. On the PinePhone, the Modem has its own OS and acts as direct gateway to the outer world for the USB NIC that is driven by Genode. However, whenever the Modem gets restarted, Modem and USB NIC receive a new MAC address. This used to conflict with the NIC routers ARP entry for the Modem that didn't cease to be valid. With this commit, the integrator of such a scenario at least has a convenient way of fixing this by ensuring that all interfaces at the USB NIC domain go down when resetting (e.g. by ensuring that the USB NIC is the only interface at that domain). Fixes #4558 |
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================================= Genode Operating System Framework ================================= This is the source tree of the reference implementation of the Genode OS architecture. For a general overview about the architecture, please refer to the project's official website: :Official project website for the Genode OS Framework: [https://genode.org/documentation/general-overview] The current implementation can be compiled for 8 different kernels: Linux, L4ka::Pistachio, L4/Fiasco, OKL4, NOVA, Fiasco.OC, seL4, and a custom "hw" microkernel for running Genode without a 3rd-party kernel. Whereas the Linux version serves us as development vehicle and enables us to rapidly develop the generic parts of the system, the actual target platforms of the framework are microkernels. There is no "perfect" microkernel - and neither should there be one. If a microkernel pretended to be fit for all use cases, it wouldn't be "micro". Hence, all microkernels differ in terms of their respective features, complexity, and supported hardware architectures. Genode allows the use of each of the kernels listed above with a rich set of device drivers, protocol stacks, libraries, and applications in a uniform way. For developers, the framework provides an easy way to target multiple different kernels instead of tying the development to a particular kernel technology. For kernel developers, Genode contributes advanced workloads, stress-testing their kernel, and enabling a variety of application use cases that would not be possible otherwise. For users and system integrators, it enables the choice of the kernel that fits best with the requirements at hand for the particular usage scenario. Documentation ############# The primary documentation is the book "Genode Foundations", which is available on the front page of Genode website: :Download the book "Genode Foundations": [https://genode.org] The book describes Genode in a holistic and comprehensive way. It equips you with a thorough understanding of the architecture, assists developers with the explanation of the development environment and system configuration, and provides a look under the hood of the framework. Furthermore, it contains the specification of the framework's programming interface. The project has a quarterly release cycle. Each version is accompanied with detailed release documentation, which is available at the documentation section of the project website: :Release documentation: [https://genode.org/documentation/release-notes/] Directory overview ################## The source tree is composed of the following subdirectories: :'doc': This directory contains general documentation along with a comprehensive collection of release notes. :'repos': This directory contains the source code, organized in so-called source-code repositories. Please refer to the README file in the 'repos' directory to learn more about the roles of the individual repositories. :'tool': Source-code management tools and scripts. Please refer to the README file contained in the directory. :'depot': Directory used by Genode's package-management tools. It contains the public keys and download locations of software providers. Additional hardware support ########################### The framework supports a variety of hardware platforms such as different ARM SoC families via supplemental repositories. :Repositories maintained by Genode Labs: [https://github.com/orgs/genodelabs/repositories] Additional community-maintained components ########################################## The components found within the main source tree are complemented by a growing library of additional software, which can be seamlessly integrated into Genode system scenarios. :Genode-world repository: [https://github.com/genodelabs/genode-world] Contact ####### The best way to get in touch with Genode developers and users is the project's mailing list. Please feel welcome to join in! :Genode Mailing Lists: [https://genode.org/community/mailing-lists] Commercial support ################## The driving force behind the Genode OS Framework is the German company Genode Labs. The company offers commercial licensing, trainings, support, and contracted development work: :Genode Labs website: [https://www.genode-labs.com]