Date: Thu, 14 Sep 2023 10:48:47 +0200
From: Magnus Karlsson <magnus.karlsson@...il.com>
To: magnus.karlsson@...el.com,
	bjorn@...nel.org,
	ast@...nel.org,
	daniel@...earbox.net,
	netdev@...r.kernel.org,
	maciej.fijalkowski@...el.com,
	bpf@...r.kernel.org,
	yhs@...com,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	song@...nel.org,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...gle.com,
	haoluo@...gle.com,
	jolsa@...nel.org,
	przemyslaw.kitszel@...el.com
Cc: Magnus Karlsson <magnus.karlsson@...il.com>
Subject: [PATCH bpf-next v4 00/10] seltests/xsk: various improvements to xskxceiver

This patch set implements several improvements to the xsk selftests
test suite that I thought were useful while debugging the xsk
multi-buffer code and tests. The largest new feature is the ability to
be able to execute a single test instead of the whole test suite. This
required some surgery on the current code, details below.

Anatomy of the path set:

1: Print useful info on a per packet basis with the option -v

2: Add a timeout in the transmission loop too. We only used to have
   one for the Rx thread, but Tx can lock up too waiting for
   completions.

3: Add an option (-m) to only run the tests (or a single test with a
   later patch) in a single mode: skb, drv, or zc (zero-copy).

4-5: Preparatory patches to be able to specify a test to run. Need to
     define the test names in a single structure and their entry
     points, so we can use this when wanting to run a specific test.

6: Adds a command line option (-l) that lists all the tests.

7: Adds a command line option (-t) that runs a specific test instead
   of the whole test suite. Can be combined with -m to specify a
   single mode too.

8: Use ksft_print_msg() uniformly throughout the tests. It was a mix
   of printf() and ksft_print_msg() before.

9: In some places, we failed the whole test suite instead of a single
   test in certain circumstances. Fix this so only the test in
   question is failed and the rest of the test suite continues.

10: Display the available command line options with -h

v3 -> v4:
* Fixed another spelling error in patch #9 [Maciej]
* Only allow the actual strings for the -m command [Maciej]
* Move some code from patch #7 to #3 [Maciej]

v2 -> v3:
* Drop the support for environment variables. Probably not useful. [Maciej]
* Fixed spelling mistake in patch #9 [Maciej]
* Fail gracefully if unsupported mode is chosen [Maciej]
* Simplified test run loop [Maciej]

v1 -> v2:

* Introduce XSKTEST_MODE env variable to be able to set the mode to
  use [Przemyslaw]
* Introduce XSKTEST_ETH env variable to be able to set the ethernet
  interface to use by introducing a new patch (#11) [Magnus]
* Fixed spelling error in patch #5 [Przemyslaw, Maciej]
* Fixed confusing documentation in patch #10  [Przemyslaw]
* The -l option can now be used without being root [Magnus, Maciej]
* Fixed documentation error in patch #7 [Maciej]
* Added error handling to the -t option [Maciej]
* -h now displayed as an option [Maciej]

Thanks: Magnus

Magnus Karlsson (10):
  selftests/xsk: print per packet info in verbose mode
  selftests/xsk: add timeout for Tx thread
  selftests/xsk: add option to only run tests in a single mode
  selftests/xsk: move all tests to separate functions
  selftests/xsk: declare test names in struct
  selftests/xsk: add option that lists all tests
  selftests/xsk: add option to run single test
  selftests/xsk: use ksft_print_msg uniformly
  selftests/xsk: fail single test instead of all tests
  selftests/xsk: display command line options with -h

 tools/testing/selftests/bpf/test_xsk.sh    |  40 +-
 tools/testing/selftests/bpf/xsk_prereqs.sh |  10 +-
 tools/testing/selftests/bpf/xskxceiver.c   | 535 ++++++++++++---------
 tools/testing/selftests/bpf/xskxceiver.h   |  44 +-
 4 files changed, 368 insertions(+), 261 deletions(-)


base-commit: 558c50cc3b135e00c9ed15df4c9159e84166f94c
--
2.42.0

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