On Mon, Nov 04, 2024 at 10:14:30AM -0800, Stanislav Fomichev wrote:
> Only RX side for now and small message to test the setup.
> In the future, we can extend it to TX side and to testing
> both sides with a couple of megs of data.
>
> make \
> -C tools/testing/selftests \
> TARGETS="drivers/hw/net" \
> install INSTALL_PATH=~/tmp/ksft
>
> scp ~/tmp/ksft ${HOST}:
> scp ~/tmp/ksft ${PEER}:
>
> cfg+="NETIF=${DEV}\n"
> cfg+="LOCAL_V6=${HOST_IP}\n"
> cfg+="REMOTE_V6=${PEER_IP}\n"
> cfg+="REMOTE_TYPE=ssh\n"
> cfg+="REMOTE_ARGS=root@${PEER}\n"
>
> echo -e "$cfg" | ssh root@${HOST} "cat > ksft/drivers/net/net.config"
> ssh root@${HOST} "cd ksft && ./run_kselftest.sh -t drivers/net:devmem.py"
>
> Reviewed-by: Mina Almasry <almasrymina@xxxxxxxxxx>
> Signed-off-by: Stanislav Fomichev <sdf@xxxxxxxxxxx>
> ---
> .../testing/selftests/drivers/net/hw/Makefile | 1 +
> .../selftests/drivers/net/hw/devmem.py | 45 +++++++++++++++++++
> 2 files changed, 46 insertions(+)
> create mode 100755 tools/testing/selftests/drivers/net/hw/devmem.py
>
> diff --git a/tools/testing/selftests/drivers/net/hw/Makefile b/tools/testing/selftests/drivers/net/hw/Makefile
> index 182348f4bd40..1c6a77480923 100644
> --- a/tools/testing/selftests/drivers/net/hw/Makefile
> +++ b/tools/testing/selftests/drivers/net/hw/Makefile
> @@ -3,6 +3,7 @@
> TEST_PROGS = \
> csum.py \
> devlink_port_split.py \
> + devmem.py \
> ethtool.sh \
> ethtool_extended_state.sh \
> ethtool_mm.sh \
> diff --git a/tools/testing/selftests/drivers/net/hw/devmem.py b/tools/testing/selftests/drivers/net/hw/devmem.py
> new file mode 100755
> index 000000000000..1416c31ff81e
> --- /dev/null
> +++ b/tools/testing/selftests/drivers/net/hw/devmem.py
> @@ -0,0 +1,45 @@
> +#!/usr/bin/env python3
> +# SPDX-License-Identifier: GPL-2.0
> +
> +from lib.py import ksft_run, ksft_exit
> +from lib.py import ksft_eq, KsftSkipEx
> +from lib.py import NetDrvEpEnv
> +from lib.py import bkg, cmd, rand_port, wait_port_listen
> +from lib.py import ksft_disruptive
> +
> +
> +def require_devmem(cfg):
> + if not hasattr(cfg, "_devmem_probed"):
> + port = rand_port()
> + probe_command = f"./ncdevmem -f {cfg.ifname}"
> + cfg._devmem_supported = cmd(probe_command, fail=False, shell=True).ret == 0
> + cfg._devmem_probed = True
> +
> + if not cfg._devmem_supported:
> + raise KsftSkipEx("Test requires devmem support")
> +
> +
> +@ksft_disruptive
> +def check_rx(cfg) -> None:
> + cfg.require_v6()
> + require_devmem(cfg)
> +
> + port = rand_port()
> + listen_cmd = f"./ncdevmem -l -f {cfg.ifname} -s {cfg.v6} -p {port}"
> +
> + with bkg(listen_cmd) as nc:
> + wait_port_listen(port)
> + cmd(f"echo -e \"hello\\nworld\"| nc {cfg.v6} {port}", host=cfg.remote, shell=True)
FWIW, in the v3 of the series I submit, Jakub asked me to replace nc
with socat due to issues with nc [1].
Your usage of nc seems pretty basic though, so maybe it's fine?
[1]: https://lore.kernel.org/netdev/20241101063426.2e1423a8@xxxxxxxxxx/
