Operating System Zone Visibility Controls
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Solution Overview
Problem
Existing computing systems face challenges in fully utilizing resources due to underutilization, particularly when multiple untrusting parties share a single hardware platform, requiring effective management and security measures to isolate applications without complex administration or hardware support.
Innovation Solution
Implementing a global zone and non-global zones within a single kernel instance operating system environment, where processes in the global zone can observe and access objects in non-global zones, while processes in non-global zones are restricted, using a new privilege to control access and visibility, and employing file system permissions to enforce access controls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple applications are consolidated onto a single hardware platform, then resource utilization is improved, but security and management complexity increase due to untrusting parties sharing resources
Solution Approach 1:
The system segments the operating system into multiple zones (global zone and non-global zones) within a single kernel instance. Each zone provides isolated execution environments with controlled access to system resources, allowing multiple untrusting applications to coexist securely on a single hardware platform without requiring complex external management overhead
Solution Approach 2:
The invention introduces zone administrators as intermediary entities that manage resource allocation and access control between different zones. This intermediary layer automates the management of shared resources, reducing the burden on system administrators while maintaining security boundaries between untrusting parties
2Reliability
If logical partitioning is implemented to isolate applications, then security is improved, but hardware support requirements and system complexity increase
Solution Approach 1:
The invention replaces hardware-based logical partitioning mechanisms with software-based zone implementation within a single kernel instance. Instead of requiring additional hardware privilege levels or specialized processor features, the system uses software-enforced zone boundaries with integrated access control, eliminating complex hardware support requirements while maintaining isolation security
3Reliability
If multiple operating system instances are used to provide isolation, then security is improved, but administration complexity and resource overhead increase
Solution Approach 1:
The invention merges multiple isolated execution environments (zones) within a single operating system kernel instance rather than requiring separate OS installations. This consolidation provides the security isolation of multiple OS instances while reducing administration complexity through unified system management and eliminating redundant OS maintenance overhead
Solution Approach 2:
The single kernel instance is designed to universally support multiple zones with different security requirements and resource allocations. This multi-functional capability allows the same kernel to serve multiple untrusting parties with isolated environments, reducing the need for multiple specialized OS instances while maintaining security boundaries
Data Source
AI summary
In accordance with one embodiment of the present invention, there is provided a mechanism for managing and controlling global visibility of resources in zones within an operating system controlled by a single kernel instance. Embodiments enable isolation and virtualization of processes within a single image of an operating system, without requiring implementation of hardware support (such as the introduction of an additional privilege level) to isolate privileged programs, and without multiple instances of an operating system or operating system kernel for some applications.