Overview

xfstests is the primary filesystem regression test suite used by the Linux kernel and filesystem maintainers to validate new and existing filesystem behavior. Originally developed at Silicon Graphics (SGI) for XFS, the suite was ported to Linux and has since become a canonical test harness for many filesystems (including ext2, ext4, btrfs, CIFS, F2FS, and more). It contains well over a thousand individual test cases covering everything from basic sanity checks to stress and ioctl-heavy operations.

62 commits · 4,783 insertions(+) · 940 deletions(-)

Contributions

My work on xfstests spans:

📌 New test cases for ext4 and related functionality

I added new test cases to the suite that exercise ext4 features and corner cases. These tests help detect regressions early in the development cycle and ensure that future filesystem changes do not break expected behavior under a range of workloads and configurations. Because xfstests is widely adopted by maintainers before merging major changes, having strong ext4 coverage increases confidence across kernel releases.

🛠 Bug fixes to improve correctness and robustness

I contributed multiple bug fixes within the test suite itself — addressing incorrect test assumptions, failures on certain configurations, and intermittent behaviors caused by kernel changes. These fixes made the suite more reliable for continuous integration and developer workflows.

⚙️ Infrastructure improvements

Beyond tests, I also worked on infrastructure and utilities within the xfstests framework to make it easier to deploy and use the test suite consistently. This includes improving test harness behavior and automation support — reducing friction for developers and QA engineers running large sets of tests against kernels under development.

xfstests continues to be an essential part of filesystem development and kernel QA, with maintainers and distributions relying on its coverage before changes are merged or shipped.