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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Andrew Lunn , Shuah Khan Cc: Stanislav Fomichev , Mina Almasry , Wei Wang , David Wei , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, bpf@vger.kernel.org, Bobby Eshleman X-Mailer: b4 0.14.3 From: Bobby Eshleman Add tests for devmem RX over a netkit device with a leased queue. This is the same as the other devmem RX test except for ncdevmem executes in a namespace, binds to a netkit, and skips the ethtool NIC configuration steps (relying on the test runner for that setup). The RX path is setup as the following: RX Path ------- Remote Physical NIC Netkit Host Netkit Guest (n= etns) | | | | |--- TCP send ------>| | | |-------------------->| | dmabuf |--- BPF redirect -->| Signed-off-by: Bobby Eshleman --- tools/testing/selftests/drivers/net/hw/Makefile | 1 + .../testing/selftests/drivers/net/hw/nk_devmem.py | 104 +++++++++++++++++= ++++ 2 files changed, 105 insertions(+) diff --git a/tools/testing/selftests/drivers/net/hw/Makefile b/tools/testin= g/selftests/drivers/net/hw/Makefile index 91df028abfc0..3cd68e06f592 100644 --- a/tools/testing/selftests/drivers/net/hw/Makefile +++ b/tools/testing/selftests/drivers/net/hw/Makefile @@ -32,6 +32,7 @@ TEST_PROGS =3D \ irq.py \ loopback.sh \ nic_timestamp.py \ + nk_devmem.py \ nk_netns.py \ pp_alloc_fail.py \ rss_api.py \ diff --git a/tools/testing/selftests/drivers/net/hw/nk_devmem.py b/tools/te= sting/selftests/drivers/net/hw/nk_devmem.py new file mode 100755 index 000000000000..0a66ff85db9d --- /dev/null +++ b/tools/testing/selftests/drivers/net/hw/nk_devmem.py @@ -0,0 +1,104 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +"""Test devmem TCP through netkit with queue leasing.""" + +import re +from os import path +from lib.py import ksft_run, ksft_exit, ksft_eq, KsftSkipEx +from lib.py import NetDrvContEnv, NetNSEnter, EthtoolFamily, NetdevFamily +from lib.py import bkg, cmd, defer, ethtool, rand_port, wait_port_listen + + +def set_flow_rule(cfg): + """Insert an ethtool flow rule steering traffic to the leased queue.""" + output =3D ethtool( + f"-N {cfg.ifname} flow-type tcp6 dst-port {cfg.port}" + f" action {cfg.src_queue}" + ).stdout + values =3D re.search(r'ID (\d+)', output).group(1) + return int(values) + + +def configure_nic(cfg): + """Common setup for devmem tests: channels, rings, RSS, queue lease.""" + cfg.require_ipver('6') + ethnl =3D EthtoolFamily() + + channels =3D ethnl.channels_get({'header': {'dev-index': cfg.ifindex}}) + channels =3D channels['combined-count'] + if channels < 2: + raise KsftSkipEx( + 'Test requires NETIF with at least 2 combined channels' + ) + + rings =3D ethnl.rings_get({'header': {'dev-index': cfg.ifindex}}) + rx_rings =3D rings['rx'] + hds_thresh =3D rings.get('hds-thresh', 0) + orig_data_split =3D rings.get('tcp-data-split', 'unknown') + + ethnl.rings_set({'header': {'dev-index': cfg.ifindex}, + 'tcp-data-split': 'enabled', + 'hds-thresh': 0, + 'rx': min(64, rx_rings)}) + defer(ethnl.rings_set, {'header': {'dev-index': cfg.ifindex}, + 'tcp-data-split': orig_data_split, + 'hds-thresh': hds_thresh, + 'rx': rx_rings}) + + cfg.src_queue =3D channels - 1 + ethtool(f"-X {cfg.ifname} equal {cfg.src_queue}") + defer(ethtool, f"-X {cfg.ifname} default") + + if hasattr(cfg, 'nk_queue'): + return + + with NetNSEnter(str(cfg.netns)): + netdevnl =3D NetdevFamily() + lease_result =3D netdevnl.queue_create( + { + "ifindex": cfg.nk_guest_ifindex, + "type": "rx", + "lease": { + "ifindex": cfg.ifindex, + "queue": {"id": cfg.src_queue, "type": "rx"}, + "netns-id": 0, + }, + } + ) + cfg.nk_queue =3D lease_result['id'] + + +def test_devmem(cfg) -> None: + """Test devmem RX: send from remote, receive on netkit guest.""" + configure_nic(cfg) + + flow_rule_id =3D set_flow_rule(cfg) + defer(ethtool, f"-N {cfg.ifname} delete {flow_rule_id}") + + rx_cmd =3D (f"ip netns exec {cfg.netns.name} {cfg.bin_local}" + f" -l -f {cfg._nk_guest_ifname} -s {cfg.nk_guest_ipv6}" + f" -p {cfg.port} -t {cfg.nk_queue} -q 1 -v 7 -n") + socat =3D f"socat -u - TCP6:[{cfg.nk_guest_ipv6}]:{cfg.port}" + + with bkg(rx_cmd, exit_wait=3DTrue) as ncdevmem_rx: + wait_port_listen(cfg.port, proto=3D"tcp", ns=3Dcfg.netns) + cmd(f"yes $(echo -e \x01\x02\x03\x04\x05\x06) | head -c 1K" + f" | {socat}", + host=3Dcfg.remote, shell=3DTrue) + + ksft_eq(ncdevmem_rx.ret, 0) + + +def main() -> None: + """Run netkit devmem tests.""" + with NetDrvContEnv(__file__, rxqueues=3D2) as cfg: + cfg.bin_local =3D path.abspath( + path.dirname(__file__) + "/ncdevmem" + ) + cfg.port =3D rand_port() + ksft_run([test_devmem], args=3D(cfg,)) + ksft_exit() + + +if __name__ =3D=3D "__main__": + main() --=20 2.52.0