From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f181.google.com (mail-yw1-f181.google.com [209.85.128.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3C699282F18 for ; Sun, 5 Apr 2026 01:45:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.181 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775353508; cv=none; b=BQga4khOi31sIcjMEMHzs6c/gTgq09CFdjfPl8JbWBc686A7G1qzxALYGRa92PCUTaJMdq2F7vWNEe4xLftkn+CFnfY5GeH3NOXaOiF1NE0T4o5V3uwjxjx+IkA2210iglXsOwhNMY8LZP0e/3R+pRj5S78WIiw7J+Xag/GaPVE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775353508; c=relaxed/simple; bh=OQSFmT9ofCYNiHH02bo8zz7A6l4ReSl4DnzEs7+mehs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=cd74B6C2ibNfq7VYwEUOl2qBAJJVrETP79alTJHcTPNigTam8oZ6zvRbmuJOi/7jlvnr7TksIQD59OgjUNjAlvhJbZAwrkXjeVREYkBzRe8tbokeAZtmqugBCbf3z7PeQMv+W2yzYyE0pPqdUzZHu5jjcr5lqjKHIUU4MPiKTU0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=omFeEn+/; arc=none smtp.client-ip=209.85.128.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="omFeEn+/" Received: by mail-yw1-f181.google.com with SMTP id 00721157ae682-79ea87af213so57901287b3.0 for ; Sat, 04 Apr 2026 18:45:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1775353505; x=1775958305; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=ZkLE+abpxmYTMWgX5YNLGGNLLd7RINT4kEa95W5sGx8=; b=omFeEn+/std8tkTzPknHeZcWi4DbHM508Sm+EjCxPf+ROK21xFR2JhfujolDszWEFI myapD0lu6WoVz7q3HaQ64Dn3BHzTG1zPljwJR+fiWfTflPnrpHuVW/iGeBBTM/HD7Ox9 eLGLdkfQ2icb/qjQ7uuSwSfN4ezdGU9MUV2CvYe28t3MkKfCpIfD/SFdO9rxo8EQ9FzF mn6AIwyp4X8MBJOAX5tRmGMCqK7icd0jP3ppUXTxNam/9wrKIRjbwCfyp/mGs+0n7xMg OTveeOymgnclLrxTImGxRLKjf7QUHV5ael77cXvr2lzD9huR948R+A48JNKsgdB1m9PF 7dtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775353505; x=1775958305; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=ZkLE+abpxmYTMWgX5YNLGGNLLd7RINT4kEa95W5sGx8=; b=R4qTZodquj/h38EDq14rhs2Dk0E7pA6Fy2XWB+hgSLgVcPTabrLINMrgrY/33L1BJJ mZcN3EmjFfJ4O9mvpO29KxirR36loN6+iFnGVIogfK+taZRoqg63hgKQ6eUAAfJtytFG UNviIBCsRw5TzTjJ0t1aCOXlFv4aMJOeTeHm/P/8NwYUCfV0ENSewQSAGIsKXZY65OVD l0sXTGaYuTsFL1J+H2DfirbjDFRnDTlr2j2slvgxjUgnv/Z9zxqsy//C28LXoiHkW64k cIG/11e9WyfCQr5wwtY8foOw6NV+JZhZOQYfbfi22HRCCTICG6h2BeCs678KLdfd9Bea IPgg== X-Gm-Message-State: AOJu0YxanBLlKAcERC5pmUIiXcPEibWhU6eiG0jtI8sK99mwEQOCKXR5 E6O6PruV/8VRxb5d0KmE6/bKNC22wWTvCuzJfxWDwkvZOMk8MBfF/i7sgc17Pg== X-Gm-Gg: AeBDies4jV0ZtX9zs209TZbxGdJqicumxSafoF6t+/LJcIi/14SjoMF89TvzzVT+Y8A V/Q4NnP7EY+Sa2ye1wibRjYJHR8+OJMbBiOclK9qifFtWMeRt+Yp1YLZk9TWRQsc1EHDBdzeAbh IMTFePT+5kj0RtSGRwnXQipYTC/wb28z2qyNzJtYFki7NXLR7lfDpPohf47v8M1CkKCU2ACdIsT EiadLqdXaEp936tOJfa/8zdPfL2awJoFO1kl3fxHQJamZvSRR8PfsBZFcinxjgZi/FyjEsN7IkP 29WHE/PFcih+5kFdNX2iMyIQkNVuhsJb2QMWnm66+OXj7sPz0QH4QeGXwoLUOcQ73dJE9NFD1jT wUipI3EpSd10deLbNxsaWa6MmOOgpUG94qJ/iESegXxVc6AA0ZCfUL8MEBthafiQ70+H0L8lfJ/ KuTxP+cetiM1sDn3QXdCF5I64kbmnDLSrttymy0x0OTq7EQHkBLNNE5iW16jx9Xs1kQn8zAE/V4 GmjGaUQWk2xH5GQZBQxwODi6Qk= X-Received: by 2002:a05:690c:dd3:b0:79c:142b:29a8 with SMTP id 00721157ae682-7a3bcaeb9f6mr94641067b3.15.1775353505073; Sat, 04 Apr 2026 18:45:05 -0700 (PDT) Received: from willemb.c.googlers.com.com (172.165.85.34.bc.googleusercontent.com. [34.85.165.172]) by smtp.gmail.com with ESMTPSA id 00721157ae682-7a370df19f3sm38226497b3.39.2026.04.04.18.45.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Apr 2026 18:45:04 -0700 (PDT) From: Willem de Bruijn To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, edumazet@google.com, pabeni@redhat.com, horms@kernel.org, Willem de Bruijn Subject: [PATCH net-next v2] selftests/net: convert so_txtime to drv-net Date: Sat, 4 Apr 2026 21:44:22 -0400 Message-ID: <20260405014458.1038165-1-willemdebruijn.kernel@gmail.com> X-Mailer: git-send-email 2.53.0.1213.gd9a14994de-goog Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Willem de Bruijn In preparation for extending to pacing hardware offload, convert the so_txtime.sh test to a drv-net test that can be run against netdevsim and real hardware. Also update so_txtime.c to not exit on first failure, but run to completion and report exit code there. This helps with debugging unexpected results, especially when processing multiple packets, as in the "reverse_order" testcase. Signed-off-by: Willem de Bruijn ---- v1 -> v2 - move so_txtime.c for net/lib to drivers/net (Jakub) - fix drivers/net/config order (Jakub) - detect passing when failure is expected (Jakub, Sashiko) - pass pylint --disable=R (Jakub) - only call ksft_run once (Jakub) - do not sleep if waiting time is negative (Sashiko) - add \n when converting error() to fprintf() (Sashiko) - 4 space indentation, instead of 2 space - increase sync delay from 100 to 200ms, to fix rare vng flakes v1: https://lore.kernel.org/netdev/20260403175047.152646-1-willemdebruijn.kernel@gmail.com/ --- .../testing/selftests/drivers/net/.gitignore | 1 + tools/testing/selftests/drivers/net/Makefile | 5 +- tools/testing/selftests/drivers/net/config | 2 + .../selftests/{ => drivers}/net/so_txtime.c | 24 +++- .../selftests/drivers/net/so_txtime.py | 88 ++++++++++++++ tools/testing/selftests/net/.gitignore | 1 - tools/testing/selftests/net/Makefile | 2 - tools/testing/selftests/net/so_txtime.sh | 110 ------------------ 8 files changed, 114 insertions(+), 119 deletions(-) rename tools/testing/selftests/{ => drivers}/net/so_txtime.c (96%) create mode 100755 tools/testing/selftests/drivers/net/so_txtime.py delete mode 100755 tools/testing/selftests/net/so_txtime.sh diff --git a/tools/testing/selftests/drivers/net/.gitignore b/tools/testing/selftests/drivers/net/.gitignore index 585ecb4d5dc4..e5314ce4bb2d 100644 --- a/tools/testing/selftests/drivers/net/.gitignore +++ b/tools/testing/selftests/drivers/net/.gitignore @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only napi_id_helper psp_responder +so_txtime diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/selftests/drivers/net/Makefile index 7c7fa75b80c2..85d6a7e26627 100644 --- a/tools/testing/selftests/drivers/net/Makefile +++ b/tools/testing/selftests/drivers/net/Makefile @@ -20,12 +20,15 @@ TEST_PROGS := \ queues.py \ ring_reconfig.py \ shaper.py \ + so_txtime.py \ stats.py \ xdp.py \ # end of TEST_PROGS # YNL files, must be before "include ..lib.mk" -YNL_GEN_FILES := psp_responder +YNL_GEN_FILES := \ + psp_responder \ + so_txtime TEST_GEN_FILES += $(YNL_GEN_FILES) include ../../lib.mk diff --git a/tools/testing/selftests/drivers/net/config b/tools/testing/selftests/drivers/net/config index 77ccf83d87e0..2d39f263e03b 100644 --- a/tools/testing/selftests/drivers/net/config +++ b/tools/testing/selftests/drivers/net/config @@ -7,4 +7,6 @@ CONFIG_NETCONSOLE=m CONFIG_NETCONSOLE_DYNAMIC=y CONFIG_NETCONSOLE_EXTENDED_LOG=y CONFIG_NETDEVSIM=m +CONFIG_NET_SCH_ETF=m +CONFIG_NET_SCH_FQ=m CONFIG_XDP_SOCKETS=y diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/drivers/net/so_txtime.c similarity index 96% rename from tools/testing/selftests/net/so_txtime.c rename to tools/testing/selftests/drivers/net/so_txtime.c index b76df1efc2ef..7d144001ecf2 100644 --- a/tools/testing/selftests/net/so_txtime.c +++ b/tools/testing/selftests/drivers/net/so_txtime.c @@ -33,6 +33,8 @@ #include #include +#include "kselftest.h" + static int cfg_clockid = CLOCK_TAI; static uint16_t cfg_port = 8000; static int cfg_variance_us = 4000; @@ -43,6 +45,8 @@ static bool cfg_rx; static uint64_t glob_tstart; static uint64_t tdeliver_max; +static int errors; + /* encode one timed transmission (of a 1B payload) */ struct timed_send { char data; @@ -131,13 +135,15 @@ static void do_recv_one(int fdr, struct timed_send *ts) fprintf(stderr, "payload:%c delay:%lld expected:%lld (us)\n", rbuf[0], (long long)tstop, (long long)texpect); - if (rbuf[0] != ts->data) - error(1, 0, "payload mismatch. expected %c", ts->data); + if (rbuf[0] != ts->data) { + fprintf(stderr, "payload mismatch. expected %c\n", ts->data); + errors++; + } if (llabs(tstop - texpect) > cfg_variance_us) { fprintf(stderr, "exceeds variance (%d us)\n", cfg_variance_us); if (!getenv("KSFT_MACHINE_SLOW")) - exit(1); + errors++; } } @@ -255,8 +261,11 @@ static void start_time_wait(void) return; now = gettime_ns(CLOCK_REALTIME); - if (cfg_start_time_ns < now) + if (cfg_start_time_ns < now) { + fprintf(stderr, "FAIL: start time already passed\n"); + errors++; return; + } err = usleep((cfg_start_time_ns - now) / 1000); if (err) @@ -513,5 +522,10 @@ int main(int argc, char **argv) else do_test_tx((void *)&cfg_src_addr, cfg_alen); - return 0; + if (errors) { + fprintf(stderr, "FAIL: %d errors\n", errors); + return KSFT_FAIL; + } + + return KSFT_PASS; } diff --git a/tools/testing/selftests/drivers/net/so_txtime.py b/tools/testing/selftests/drivers/net/so_txtime.py new file mode 100755 index 000000000000..31b95a7b5b8b --- /dev/null +++ b/tools/testing/selftests/drivers/net/so_txtime.py @@ -0,0 +1,88 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 + +"""Regression tests for the SO_TXTIME interface. + +Test delivery time in FQ and ETF qdiscs. +""" + +import time + +from lib.py import ksft_exit, ksft_run, ksft_variants +from lib.py import KsftNamedVariant, KsftSkipEx +from lib.py import NetDrvEpEnv, bkg, cmd + + +def test_so_txtime(cfg, clockid, ipver, args_tx, args_rx, expect_fail): + """Main function. Run so_txtime as sender and receiver.""" + bin_path = cfg.test_dir / "so_txtime" + + tstart = time.time_ns() + 200_000_000 + + cmd_addr = f"-S {cfg.addr_v[ipver]} -D {cfg.remote_addr_v[ipver]}" + cmd_base = f"{bin_path} -{ipver} -c {clockid} -t {tstart} {cmd_addr}" + cmd_rx = f"{cmd_base} {args_rx} -r" + cmd_tx = f"{cmd_base} {args_tx}" + + with bkg(cmd_rx, host=cfg.remote, fail=(not expect_fail), exit_wait=True): + cmd(cmd_tx) + + +def _test_variants_mono(): + for ipver in ["4", "6"]: + for testcase in [ + ["no_delay", "a,-1", "a,-1"], + ["zero_delay", "a,0", "a,0"], + ["one_pkt", "a,10", "a,10"], + ["in_order", "a,10,b,20", "a,10,b,20"], + ["reverse_order", "a,20,b,10", "b,20,a,20"], + ]: + name = f"_v{ipver}_{testcase[0]}" + yield KsftNamedVariant(name, ipver, testcase[1], testcase[2]) + + +@ksft_variants(_test_variants_mono()) +def test_so_txtime_mono(cfg, ipver, args_tx, args_rx): + """Run all variants of monotonic (fq) tests.""" + cmd(f"tc qdisc replace dev {cfg.ifname} root fq") + test_so_txtime(cfg, "mono", ipver, args_tx, args_rx, False) + + +def _test_variants_etf(): + for ipver in ["4", "6"]: + for testcase in [ + ["no_delay", "a,-1", "a,-1", True], + ["zero_delay", "a,0", "a,0", True], + ["one_pkt", "a,10", "a,10", False], + ["in_order", "a,10,b,20", "a,10,b,20", False], + ["reverse_order", "a,20,b,10", "b,10,a,20", False], + ]: + name = f"_v{ipver}_{testcase[0]}" + yield KsftNamedVariant( + name, ipver, testcase[1], testcase[2], testcase[3] + ) + + +@ksft_variants(_test_variants_etf()) +def test_so_txtime_etf(cfg, ipver, args_tx, args_rx, expect_fail): + """Run all variants of etf tests.""" + try: + # ETF does not support change, so remove and re-add it instead. + cmd_prefix = f"tc qdisc replace dev {cfg.ifname} root" + cmd(f"{cmd_prefix} pfifo_fast") + cmd(f"{cmd_prefix} etf clockid CLOCK_TAI delta 400000") + except Exception as e: + raise KsftSkipEx("tc does not support qdisc etf. skipping") from e + + test_so_txtime(cfg, "tai", ipver, args_tx, args_rx, expect_fail) + + +def main() -> None: + """Boilerplate ksft main.""" + with NetDrvEpEnv(__file__) as cfg: + ksft_run([test_so_txtime_mono, test_so_txtime_etf], args=(cfg,)) + ksft_exit() + + +if __name__ == "__main__": + main() diff --git a/tools/testing/selftests/net/.gitignore b/tools/testing/selftests/net/.gitignore index 97ad4d551d44..02ad4c99a2b4 100644 --- a/tools/testing/selftests/net/.gitignore +++ b/tools/testing/selftests/net/.gitignore @@ -40,7 +40,6 @@ skf_net_off socket so_incoming_cpu so_netns_cookie -so_txtime so_rcv_listener stress_reuseport_listen tap diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 6bced3ed798b..b7f51e8f190f 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -81,7 +81,6 @@ TEST_PROGS := \ rxtimestamp.sh \ sctp_vrf.sh \ skf_net_off.sh \ - so_txtime.sh \ srv6_end_dt46_l3vpn_test.sh \ srv6_end_dt4_l3vpn_test.sh \ srv6_end_dt6_l3vpn_test.sh \ @@ -154,7 +153,6 @@ TEST_GEN_FILES := \ skf_net_off \ so_netns_cookie \ so_rcv_listener \ - so_txtime \ socket \ stress_reuseport_listen \ tcp_fastopen_backup_key \ diff --git a/tools/testing/selftests/net/so_txtime.sh b/tools/testing/selftests/net/so_txtime.sh deleted file mode 100755 index 5e861ad32a42..000000000000 --- a/tools/testing/selftests/net/so_txtime.sh +++ /dev/null @@ -1,110 +0,0 @@ -#!/bin/bash -# SPDX-License-Identifier: GPL-2.0 -# -# Regression tests for the SO_TXTIME interface - -set -e - -readonly ksft_skip=4 -readonly DEV="veth0" -readonly BIN="./so_txtime" - -readonly RAND="$(mktemp -u XXXXXX)" -readonly NSPREFIX="ns-${RAND}" -readonly NS1="${NSPREFIX}1" -readonly NS2="${NSPREFIX}2" - -readonly SADDR4='192.168.1.1' -readonly DADDR4='192.168.1.2' -readonly SADDR6='fd::1' -readonly DADDR6='fd::2' - -cleanup() { - ip netns del "${NS2}" - ip netns del "${NS1}" -} - -trap cleanup EXIT - -# Create virtual ethernet pair between network namespaces -ip netns add "${NS1}" -ip netns add "${NS2}" - -ip link add "${DEV}" netns "${NS1}" type veth \ - peer name "${DEV}" netns "${NS2}" - -# Bring the devices up -ip -netns "${NS1}" link set "${DEV}" up -ip -netns "${NS2}" link set "${DEV}" up - -# Set fixed MAC addresses on the devices -ip -netns "${NS1}" link set dev "${DEV}" address 02:02:02:02:02:02 -ip -netns "${NS2}" link set dev "${DEV}" address 06:06:06:06:06:06 - -# Add fixed IP addresses to the devices -ip -netns "${NS1}" addr add 192.168.1.1/24 dev "${DEV}" -ip -netns "${NS2}" addr add 192.168.1.2/24 dev "${DEV}" -ip -netns "${NS1}" addr add fd::1/64 dev "${DEV}" nodad -ip -netns "${NS2}" addr add fd::2/64 dev "${DEV}" nodad - -run_test() { - local readonly IP="$1" - local readonly CLOCK="$2" - local readonly TXARGS="$3" - local readonly RXARGS="$4" - - if [[ "${IP}" == "4" ]]; then - local readonly SADDR="${SADDR4}" - local readonly DADDR="${DADDR4}" - elif [[ "${IP}" == "6" ]]; then - local readonly SADDR="${SADDR6}" - local readonly DADDR="${DADDR6}" - else - echo "Invalid IP version ${IP}" - exit 1 - fi - - local readonly START="$(date +%s%N --date="+ 0.1 seconds")" - - ip netns exec "${NS2}" "${BIN}" -"${IP}" -c "${CLOCK}" -t "${START}" -S "${SADDR}" -D "${DADDR}" "${RXARGS}" -r & - ip netns exec "${NS1}" "${BIN}" -"${IP}" -c "${CLOCK}" -t "${START}" -S "${SADDR}" -D "${DADDR}" "${TXARGS}" - wait "$!" -} - -do_test() { - run_test $@ - [ $? -ne 0 ] && ret=1 -} - -do_fail_test() { - run_test $@ - [ $? -eq 0 ] && ret=1 -} - -ip netns exec "${NS1}" tc qdisc add dev "${DEV}" root fq -set +e -ret=0 -do_test 4 mono a,-1 a,-1 -do_test 6 mono a,0 a,0 -do_test 6 mono a,10 a,10 -do_test 4 mono a,10,b,20 a,10,b,20 -do_test 6 mono a,20,b,10 b,20,a,20 - -if ip netns exec "${NS1}" tc qdisc replace dev "${DEV}" root etf clockid CLOCK_TAI delta 400000; then - do_fail_test 4 tai a,-1 a,-1 - do_fail_test 6 tai a,0 a,0 - do_test 6 tai a,10 a,10 - do_test 4 tai a,10,b,20 a,10,b,20 - do_test 6 tai a,20,b,10 b,10,a,20 -else - echo "tc ($(tc -V)) does not support qdisc etf. skipping" - [ $ret -eq 0 ] && ret=$ksft_skip -fi - -if [ $ret -eq 0 ]; then - echo OK. All tests passed -elif [[ $ret -ne $ksft_skip && -n "$KSFT_MACHINE_SLOW" ]]; then - echo "Ignoring errors due to slow environment" 1>&2 - ret=0 -fi -exit $ret -- 2.53.0.1213.gd9a14994de-goog