@@ -5,6 +5,7 @@ from lib.py import ksft_run, ksft_exit, ksft_pr
from lib.py import ksft_ge, ksft_eq, ksft_in, ksft_true, ksft_raises, KsftSkipEx, KsftXfailEx
from lib.py import EthtoolFamily, NetdevFamily, RtnlFamily, NlError
from lib.py import NetDrvEnv
+from lib.py import ip
ethnl = EthtoolFamily()
netfam = NetdevFamily()
@@ -133,9 +134,37 @@ rtnl = RtnlFamily()
ksft_eq(cm.exception.nl_msg.extack['bad-attr'], '.ifindex')
+def check_down(cfg) -> None:
+ try:
+ qstat = netfam.qstats_get({"ifindex": cfg.ifindex}, dump=True)
+ except NlError as e:
+ if e.error == 95:
+ raise KsftSkipEx("qstats not supported by the device")
+ raise
+
+ ip(f"link set dev {cfg.dev['ifname']} down")
+
+ try:
+ qstat = qstat[0]
+ qstat2 = netfam.qstats_get({"ifindex": cfg.ifindex}, dump=True)[0]
+ for k, v in qstat.items():
+ if k not in qstat2:
+ # skip the stats that are not globally preserved
+ continue
+ if qstat2[k] < qstat[k]:
+ raise Exception(f"{k} ({qstat2[k]}) should be preserved but has lower value ({qstat[k]}) when the device is down")
+
+ # exercise per-queue API to make sure that "device down" state
+ # is handled correctly and doesn't crash
+ netfam.qstats_get({"ifindex": cfg.ifindex, "scope": "queue"}, dump=True)
+ finally:
+ ip(f"link set dev {cfg.dev['ifname']} up")
+
+
def main() -> None:
with NetDrvEnv(__file__) as cfg:
- ksft_run([check_pause, check_fec, pkt_byte_sum, qstat_by_ifindex],
+ ksft_run([check_pause, check_fec, pkt_byte_sum, qstat_by_ifindex,
+ check_down],
args=(cfg, ))
ksft_exit()
Verify that total device stats don't decrease after it has been turned down. Also make sure the device doesn't crash when we access per-queue stats when it's down (in case it tries to access some pointers that are NULL). KTAP version 1 1..5 ok 1 stats.check_pause ok 2 stats.check_fec ok 3 stats.pkt_byte_sum ok 4 stats.qstat_by_ifindex ok 5 stats.check_down \# Totals: pass:5 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Stanislav Fomichev <sdf@fomichev.me> -- Cc: Shuah Khan <shuah@kernel.org> Cc: Joe Damato <jdamato@fastly.com> Cc: Petr Machata <petrm@nvidia.com> Cc: linux-kselftest@vger.kernel.org --- tools/testing/selftests/drivers/net/stats.py | 31 +++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-)