[lkaliszc]

This pull request introduces support for the Linux iproute2 dcb tool for reading and configuring Data Center Bridging (DCB) settings, alongside the legacy tools. It adds a new DcbCli class for interacting with the dcb tool, extends the API to allow selecting the tool, and provides comprehensive unit tests for the new functionality.

New DCB tool support:

• Added the DcbCli class in mfd_dcb/dcb_wrapper.py to provide get/set operations for ETS, PFC, and APP tables via the iproute2 dcb command, including robust output parsing and error handling.
• Introduced the DcbToolType enum in mfd_dcb/enums.py to select between legacy and dcb tools for configuration.

API extensions and integration:

• Updated mfd_dcb/linux.py to add tool parameters to set_ets, set_pfc, and new APP table management methods (set_app, del_app, replace_app, flush_app), allowing explicit selection of the DCB tool and supporting the new dcb-based workflows. [1] [2] [3] [4] [5]
• Modified the internal tool selection to instantiate DcbCli when tool_name == "dcb".

Examples and tests:

• Expanded examples/linux_example.py to demonstrate setting and reading DCB configuration using the new dcb tool and the extended API. [1] [2]
• Added a comprehensive unit test suite for DcbCli in tests/unit/test_mfd_dcb/test_dcb_wrapper.py, covering parsing, error handling, and merged configuration retrieval.

[Copilot]

🟡 Changes recommended

APP parsing loses repeated protocol entries and misidentifies overlapping selectors.

1 open issue

• Parse APP pairs without dropping priorities or matching partial selectors · New

What changed in this PR

Adds iproute2 dcb support alongside the existing Linux DCB tools.

Changes:

• Adds ETS, PFC, and APP configuration readers.
• Extends Linux APIs with tool selection and APP management.
• Adds usage examples and unit tests.

File	Description
tests/​unit/​test_mfd_dcb/​test_linux.py	Tests new commands and legacy behavior.
tests/​unit/​test_mfd_dcb/​test_dcb_wrapper.py	Tests parsing and error handling.
mfd_dcb/​linux.py	Integrates tool selection and configuration commands.
mfd_dcb/​enums.py	Adds the DCB tool enum.
mfd_dcb/​dcb_wrapper.py	Implements iproute2 configuration readers.
examples/​linux_example.py	Demonstrates the new APIs.

_{Review effort: Balanced}