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Special ioctls are those that are passed pass a struct with subpointer(s) to arbitrary memory, as we have to handle them differently to pass that memory through kernel.
This PR also adds tests for new SIOCETHTOOL ioctl

Description

Motivation and Context

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Chore (refactoring, style fixes, git/CI config, submodule management, no code logic changes)

How Has This Been Tested?

  • Already covered by automatic testing.
  • New test added: (add PR link here).
  • Tested by hand on: ia32-generic-qemu.

Checklist:

  • My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • I have added tests to cover my changes.
  • All new and existing linter checks and tests passed.
  • My changes generate no new compilation warnings for any of the targets.

Special treatment

@julianuziemblo julianuziemblo requested a review from Darchiv August 29, 2025 13:23
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Summary of Changes

Hello @julianuziemblo, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the test coverage for network-related system calls, focusing on complex ioctl operations and routing table management. The added tests ensure the robustness and correctness of how the system handles network interface configuration and dynamic routing, particularly for operations involving nested data structures and memory passing.

Highlights

  • New tests for special ioctls: This pull request introduces new tests for 'special' ioctls, which are system calls that pass structures containing pointers to arbitrary memory. These require specific handling within the kernel to correctly pass data from userspace.
  • SIOCETHTOOL ioctl tests: Comprehensive tests have been added for the SIOCETHTOOL ioctl, covering various commands such as ETHTOOL_GSET, ETHTOOL_SSET, ETHTOOL_TEST, ETHTOOL_GLOOPBACK, and ETHTOOL_SLOOPBACK to ensure proper network interface configuration and diagnostics.
  • Routing command tests: New Python-based tests have been added to validate the functionality of 'route' commands, specifically route add and route del, ensuring correct manipulation of the system's routing table.
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Code Review

This pull request introduces valuable new tests for special ioctl commands and the route utility. The C language tests for ioctl have some significant structural issues concerning resource management and test isolation that should be addressed. Specifically, there's a file descriptor leak and a fragile dependency on test execution order. The Python test for route has some minor style and convention issues. Overall, these are good additions, but the suggested fixes will improve their robustness and maintainability.

@julianuziemblo julianuziemblo force-pushed the julianuziemblo/test-ioctl-special branch 2 times, most recently from f2fa17a to e56b8b4 Compare August 29, 2025 14:20
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Code Review

This pull request adds several new tests for ioctl functionality, particularly for 'special' ioctls that involve pointers and for ethtool commands. A new Python-based test for the route command is also included. The changes are well-structured, and the tests cover important functionality. I've found a few minor issues in the new C test file, mainly related to code clarity and robustness, and a small typo in an error message. My suggestions aim to improve maintainability and fix the typo.

@julianuziemblo julianuziemblo force-pushed the julianuziemblo/test-ioctl-special branch 2 times, most recently from 9b04cb4 to 7e1475a Compare September 26, 2025 14:53
Special ioctls are those with that pass a struct
with subpointer(s) to arbitrary memory, as we have
to handle them differently to pass that memory.

JIRA: RTOS-1014
@julianuziemblo julianuziemblo force-pushed the julianuziemblo/test-ioctl-special branch from 7e1475a to 8e4ee36 Compare September 26, 2025 15:17
@damianloew damianloew requested a review from adamdebek October 6, 2025 09:11
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2 participants