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selftests: net-drv: queues: sanity check netlink dumps

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This test already catches a netlink bug fixed by this series,
but only when running on HW with many queues. Make sure the
netdevsim instance created has a lot of queues, and constrain
the size of the recv_buffer used by netlink.

While at it test both rx and tx queues.

Reviewed-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://patch.msgid.link/20241213152244.3080955-5-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2024-12-13 07:22:43 -08:00
parent 0518863407
commit 1234810b16
1 changed files with 13 additions and 10 deletions
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23
tools/testing/selftests/drivers/net/queues.py
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@ -8,25 +8,28 @@ from lib.py import cmd
import glob import glob
def sys_get_queues(ifname) -> int: def sys_get_queues(ifname, qtype='rx') -> int:
folders = glob.glob(f'/sys/class/net/{ifname}/queues/rx-*') folders = glob.glob(f'/sys/class/net/{ifname}/queues/{qtype}-*')
return len(folders) return len(folders)
def nl_get_queues(cfg, nl): def nl_get_queues(cfg, nl, qtype='rx'):
queues = nl.queue_get({'ifindex': cfg.ifindex}, dump=True) queues = nl.queue_get({'ifindex': cfg.ifindex}, dump=True)
if queues: if queues:
return len([q for q in queues if q['type'] == 'rx']) return len([q for q in queues if q['type'] == qtype])
return None return None
def get_queues(cfg, nl) -> None: def get_queues(cfg, nl) -> None:
queues = nl_get_queues(cfg, nl) snl = NetdevFamily(recv_size=4096)
if not queues:
raise KsftSkipEx('queue-get not supported by device')
expected = sys_get_queues(cfg.dev['ifname']) for qtype in ['rx', 'tx']:
ksft_eq(queues, expected) queues = nl_get_queues(cfg, snl, qtype)
if not queues:
raise KsftSkipEx('queue-get not supported by device')
expected = sys_get_queues(cfg.dev['ifname'], qtype)
ksft_eq(queues, expected)
def addremove_queues(cfg, nl) -> None: def addremove_queues(cfg, nl) -> None:
@ -57,7 +60,7 @@ def addremove_queues(cfg, nl) -> None:
def main() -> None: def main() -> None:
with NetDrvEnv(__file__, queue_count=3) as cfg: with NetDrvEnv(__file__, queue_count=100) as cfg:
ksft_run([get_queues, addremove_queues], args=(cfg, NetdevFamily())) ksft_run([get_queues, addremove_queues], args=(cfg, NetdevFamily()))
ksft_exit() ksft_exit()