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author | Po-Hsu Lin <po-hsu.lin@canonical.com> | 2023-03-16 00:53:53 +0800 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2023-03-16 17:38:05 -0700 |
commit | 24994513ad13ff2c47ba91d2b5df82c3d496c370 (patch) | |
tree | 38c2a2cfb5a56f835b74471f1fe66097aec45f5a | |
parent | f38373345c65529639a01fba3675eb8cb4c579c3 (diff) | |
download | linux-stable-24994513ad13ff2c47ba91d2b5df82c3d496c370.tar.gz linux-stable-24994513ad13ff2c47ba91d2b5df82c3d496c370.tar.bz2 linux-stable-24994513ad13ff2c47ba91d2b5df82c3d496c370.zip |
selftests: net: devlink_port_split.py: skip test if no suitable device available
The `devlink -j port show` command output may not contain the "flavour"
key, an example from Ubuntu 22.10 s390x LPAR(5.19.0-37-generic), with
mlx4 driver and iproute2-5.15.0:
{"port":{"pci/0001:00:00.0/1":{"type":"eth","netdev":"ens301"},
"pci/0001:00:00.0/2":{"type":"eth","netdev":"ens301d1"},
"pci/0002:00:00.0/1":{"type":"eth","netdev":"ens317"},
"pci/0002:00:00.0/2":{"type":"eth","netdev":"ens317d1"}}}
This will cause a KeyError exception.
Create a validate_devlink_output() to check for this "flavour" from
devlink command output to avoid this KeyError exception. Also let
it handle the check for `devlink -j dev show` output in main().
Apart from this, if the test was not started because the max lanes of
the designated device is 0. The script will still return 0 and thus
causing a false-negative test result.
Use a found_max_lanes flag to determine if these tests were skipped
due to this reason and return KSFT_SKIP to make it more clear.
Link: https://bugs.launchpad.net/bugs/1937133
Fixes: f3348a82e727 ("selftests: net: Add port split test")
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Link: https://lore.kernel.org/r/20230315165353.229590-1-po-hsu.lin@canonical.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-rwxr-xr-x | tools/testing/selftests/net/devlink_port_split.py | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/tools/testing/selftests/net/devlink_port_split.py b/tools/testing/selftests/net/devlink_port_split.py index 2b5d6ff87373..2d84c7a0be6b 100755 --- a/tools/testing/selftests/net/devlink_port_split.py +++ b/tools/testing/selftests/net/devlink_port_split.py @@ -59,6 +59,8 @@ class devlink_ports(object): assert stderr == "" ports = json.loads(stdout)['port'] + validate_devlink_output(ports, 'flavour') + for port in ports: if dev in port: if ports[port]['flavour'] == 'physical': @@ -220,6 +222,27 @@ def split_splittable_port(port, k, lanes, dev): unsplit(port.bus_info) +def validate_devlink_output(devlink_data, target_property=None): + """ + Determine if test should be skipped by checking: + 1. devlink_data contains values + 2. The target_property exist in devlink_data + """ + skip_reason = None + if any(devlink_data.values()): + if target_property: + skip_reason = "{} not found in devlink output, test skipped".format(target_property) + for key in devlink_data: + if target_property in devlink_data[key]: + skip_reason = None + else: + skip_reason = 'devlink output is empty, test skipped' + + if skip_reason: + print(skip_reason) + sys.exit(KSFT_SKIP) + + def make_parser(): parser = argparse.ArgumentParser(description='A test for port splitting.') parser.add_argument('--dev', @@ -240,12 +263,9 @@ def main(cmdline=None): stdout, stderr = run_command(cmd) assert stderr == "" + validate_devlink_output(json.loads(stdout)) devs = json.loads(stdout)['dev'] - if devs: - dev = list(devs.keys())[0] - else: - print("no devlink device was found, test skipped") - sys.exit(KSFT_SKIP) + dev = list(devs.keys())[0] cmd = "devlink dev show %s" % dev stdout, stderr = run_command(cmd) @@ -255,6 +275,7 @@ def main(cmdline=None): ports = devlink_ports(dev) + found_max_lanes = False for port in ports.if_names: max_lanes = get_max_lanes(port.name) @@ -277,6 +298,11 @@ def main(cmdline=None): split_splittable_port(port, lane, max_lanes, dev) lane //= 2 + found_max_lanes = True + + if not found_max_lanes: + print(f"Test not started, no port of device {dev} reports max_lanes") + sys.exit(KSFT_SKIP) if __name__ == "__main__": |