fstests

[Lakshmipathi]

Summary

(x)fstests is a test suite for major file systems supported by the Linux kernel such as ext4, xfs, btrfs, cifs, nfs, f2fs...

Currently, file system kernel fixes aren't being back-ported to LTS due to a lack of automated testing to verify they don't introduce regressions. Kernel bugs need to be well identified in the first place before fixes can be made for them and then back-ported. Running fstests in KernelCI would help solve these issues.

Requirements

Some tests will require a minimum amount of physical disk storage (4 disks of 20G?)

Ideally, a variety of hardware storage medium should be used to ensure all the file system features are exercised. Some storage medium such as eMMC is not suitable for write-heavy operations but read-only file systems tests may be run on them. Running in virtual environments such as in Kubernetes or with QEMU should also be considered.

Steps

• [ ] Create Debian rootfs image bullseye-fstests including the fstests built from source (rewrite of PR #230)
• [ ] Add any extra subsystem or maintainer's branches to KernelCI related to file systems
• [ ] Add a kernel config fragment to KernelCI if required to run the tests
• [ ] Make a list of all the test cases that can be run and pick some initial ones
• [ ] Get an initial set of tests running on platforms already available in KernelCI
• [ ] Investigate how to run in Kubernetes with Cloud storage

Related topics

• [x] #683
• [ ] #821

Notes

We may start by running quick tests with following command:

./check -g quick

The tests will be executed based on the block device configured as TESTDEV.

For QEMU, initial tests may be run on x86 only.

[dzickusrh]

Red Hat runs xfstests through CKI. We have noticed various flakes with some of the tests and have filtered them out. See https://github.com/CKI-project/tests-beaker/tree/master/filesystems/xfs/xfstests for how we are currently running it.

[dzickusrh]

Sorry that was an old link. New link here: https://gitlab.com/cki-project/kernel-tests/-/tree/master/filesystems/xfs/xfstests

[gctucker]

Closing #230 as this needs to be re-done now using kci_rootfs and the associated rootfs-configs.yaml configruation.

[gctucker]

See also the performance tests: #821

[gctucker]

Sorry that was an old link. New link here: https://gitlab.com/cki-project/kernel-tests/-/tree/master/filesystems/xfs/xfstests

New new link: https://gitlab.com/redhat/centos-stream/tests/kernel/kernel-tests/-/tree/main/filesystems/xfs/xfstests