Currently the options for writing networking tests are C, bash or some mix of the two. YAML/Netlink gives us the ability to easily interface with Netlink in higher level laguages. In particular, there is a Python library already available in tree, under tools/net. Add the scaffolding which allows writing tests using this library. The "scaffolding" is needed because the library lives under tools/net and uses YAML files from under Documentation/. So we need a small amount of glue code to find those things and add them to TEST_FILES. This series adds both a basic SW sanity test and driver test which can be run against netdevsim or a real device. When I develop core code I usually test with netdevsim, then a real device, and then a backport to Meta's kernel. Because of the lack of integration, until now I had to throw away the (YNL-based) test script and netdevsim code. Running tests in tree directly: $ ./tools/testing/selftests/net/nl_netdev.py KTAP version 1 1..2 ok 1 nl_netdev.empty_check ok 2 nl_netdev.lo_check # Totals: pass:2 fail:0 xfail:0 xpass:0 skip:0 error:0 in tree via make: $ make -C tools/testing/selftests/ TARGETS=net \ TEST_PROGS=nl_netdev.py TEST_GEN_PROGS="" run_tests [ ... ] and installed externally, all seem to work: $ make -C tools/testing/selftests/ TARGETS=net \ install INSTALL_PATH=/tmp/ksft-net $ /tmp/ksft-net/run_kselftest.sh -t net:nl_netdev.py [ ... ] For driver tests I followed the lead of net/forwarding and get the device name from env and/or a config file. v2: (see patches for minor changes) - don't add to TARGETS, create a deperate variable with deps - support and use with - support and use passing arguments to tests v1: https://lore.kernel.org/all/20240402010520.1209517-1-kuba@xxxxxxxxxx/ Jakub Kicinski (7): netlink: specs: define ethtool header flags tools: ynl: copy netlink error to NlError selftests: net: add scaffolding for Netlink tests in Python selftests: nl_netdev: add a trivial Netlink netdev test netdevsim: report stats by default, like a real device selftests: drivers: add scaffolding for Netlink tests in Python testing: net-drv: add a driver test for stats reporting Documentation/netlink/specs/ethtool.yaml | 6 + drivers/net/netdevsim/ethtool.c | 11 ++ drivers/net/netdevsim/netdev.c | 45 +++++++ tools/net/ynl/lib/ynl.py | 3 +- tools/testing/selftests/Makefile | 10 +- tools/testing/selftests/drivers/net/Makefile | 7 ++ .../testing/selftests/drivers/net/README.rst | 30 +++++ .../selftests/drivers/net/lib/py/__init__.py | 17 +++ .../selftests/drivers/net/lib/py/env.py | 52 ++++++++ tools/testing/selftests/drivers/net/stats.py | 86 +++++++++++++ tools/testing/selftests/net/Makefile | 1 + tools/testing/selftests/net/lib/Makefile | 8 ++ .../testing/selftests/net/lib/py/__init__.py | 7 ++ tools/testing/selftests/net/lib/py/consts.py | 9 ++ tools/testing/selftests/net/lib/py/ksft.py | 96 ++++++++++++++ tools/testing/selftests/net/lib/py/nsim.py | 118 ++++++++++++++++++ tools/testing/selftests/net/lib/py/utils.py | 47 +++++++ tools/testing/selftests/net/lib/py/ynl.py | 49 ++++++++ tools/testing/selftests/net/nl_netdev.py | 24 ++++ 19 files changed, 624 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/Makefile create mode 100644 tools/testing/selftests/drivers/net/README.rst create mode 100644 tools/testing/selftests/drivers/net/lib/py/__init__.py create mode 100644 tools/testing/selftests/drivers/net/lib/py/env.py create mode 100755 tools/testing/selftests/drivers/net/stats.py create mode 100644 tools/testing/selftests/net/lib/Makefile create mode 100644 tools/testing/selftests/net/lib/py/__init__.py create mode 100644 tools/testing/selftests/net/lib/py/consts.py create mode 100644 tools/testing/selftests/net/lib/py/ksft.py create mode 100644 tools/testing/selftests/net/lib/py/nsim.py create mode 100644 tools/testing/selftests/net/lib/py/utils.py create mode 100644 tools/testing/selftests/net/lib/py/ynl.py create mode 100755 tools/testing/selftests/net/nl_netdev.py -- 2.44.0
