Commit 0c8754b7 authored by Jakub Kicinski's avatar Jakub Kicinski
Browse files

selftests: drv-net: test RSS header field configuration 

Test reading RXFH fields over IOCTL and netlink.

  # ./tools/testing/selftests/drivers/net/hw/rss_api.py
  TAP version 13
  1..3
  ok 1 rss_api.test_rxfh_indir_ntf
  ok 2 rss_api.test_rxfh_indir_ctx_ntf
  ok 3 rss_api.test_rxfh_fields
  # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0

Link: https://patch.msgid.link/20250708220640.2738464-6-kuba@kernel.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 17833174

tools/testing/selftests/drivers/net/hw/rss_api.py

+47 −0
Original line number Diff line number Diff line
@@ -20,6 +20,38 @@ def _ethtool_create(cfg, act, opts): 
    return int(output.split()[-1])





def _ethtool_get_cfg(cfg, fl_type, to_nl=False):

    descr = ethtool(f"-n {cfg.ifname} rx-flow-hash {fl_type}").stdout



    if to_nl:

        converter = {

            "IP SA": "ip-src",

            "IP DA": "ip-dst",

            "L4 bytes 0 & 1 [TCP/UDP src port]": "l4-b-0-1",

            "L4 bytes 2 & 3 [TCP/UDP dst port]": "l4-b-2-3",

        }



        ret = set()

    else:

        converter = {

            "IP SA": "s",

            "IP DA": "d",

            "L3 proto": "t",

            "L4 bytes 0 & 1 [TCP/UDP src port]": "f",

            "L4 bytes 2 & 3 [TCP/UDP dst port]": "n",

        }



        ret = ""



    for line in descr.split("\n")[1:-2]:

        # if this raises we probably need to add more keys to converter above

        if to_nl:

            ret.add(converter[line])

        else:

            ret += converter[line]

    return ret





def test_rxfh_indir_ntf(cfg):

    """

    Check that Netlink notifications are generated when RSS indirection
@@ -77,6 +109,21 @@ def test_rxfh_indir_ctx_ntf(cfg): 
    ksft_eq(set(ntf["msg"]["indir"]), {1})





def test_rxfh_fields(cfg):

    """

    Test reading Rx Flow Hash over Netlink.

    """



    flow_types = ["tcp4", "tcp6", "udp4", "udp6"]

    ethnl = EthtoolFamily()



    cfg_nl = ethnl.rss_get({"header": {"dev-index": cfg.ifindex}})

    for fl_type in flow_types:

        one = _ethtool_get_cfg(cfg, fl_type, to_nl=True)

        ksft_eq(one, cfg_nl["flow-hash"][fl_type],

                comment="Config for " + fl_type)





def main() -> None:

    """ Ksft boiler plate main """