Re: [PATCH v15 16/26] nfsd: add LOCALIO support

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> On Sep 7, 2024, at 3:08 PM, Mike Snitzer <snitzer@xxxxxxxxxx> wrote:
> 
> On Sat, Sep 07, 2024 at 04:09:33PM +0000, Chuck Lever III wrote:
>> 
>>> On Sep 7, 2024, at 11:17 AM, Mike Snitzer <snitzer@xxxxxxxxxx> wrote:
>>> 
>>> Rather than have general concern for LOCALIO doing something wrong,
>>> we'd do well to make sure there is proper test coverage for required
>>> shutdown sequences (completely indepent of LOCALIO, maybe that already
>>> exists?).
>> 
>> That is on the to-do list for the NFSD kdevops CI infrastructure,
>> but unfortunately implementation has not been started yet.
> 
> Could be a good project for me to help with.  I'm on the fence between
> kdevops and ktest, ideally I could come up with something that'd
> easily hook into both test harnesses.
> 
> Supporting both would be simple if the new tests were added to a
> popular testsuite that both can run (e.g. xfstests, or any other
> separate nfs/nfsd testsuite you may have?).  Or is "NFSD kdevops CI"
> itself what your tests be engineered with?

kdevops is a CI framework; the individual tests are
"workflows" that run under that framework.

 Source: https://github.com/linux-kdevops/kdevops

Right now kdevops can run these tests (created elsewhere):

- (x)fstests
- the git regression suite
- ltp
- nfstests (from Jorge Borge)
- pynfs

... in addition to the kernel self-tests, CXL-related
tests, and a system reboot test, among others.

We will have to develop something from scratch that is
geared specifically towards NFSD on Linux. Probably the
closest fit for unit-testing administrative commands on
Linux is ltp:

 Source: https://github.com/linux-test-project/ltp
 Docs: https://linux-test-project.readthedocs.io/en/latest/

If ktest can run ltp, then new ltp tests could be inserted
easily into both kdevops or ktest.

Or the NFSD administrative tests might be added to the
kernel's self-test suite or to Kunit; such tests would
reside under tools/ in the kernel source tree.

A third alternative would be to add the tests to the
nfs-utils package, where Linux NFS user space tooling
lives today; but I don't think there's a lot of test
framework in that package right now.

--
Chuck Lever






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