#!/usr/bin/env python3# SPDX-License-Identifier: GPL-2.0 """Test napi threaded states.""" from lib.py import ksft_run, ksft_exitfrom lib.py import ksft_eq, ksft_ne, ksft_gefrom lib.py import NetDrvEnv, NetdevFamilyfrom lib.py import cmd, defer, ethtool  def _assert_napi_threaded_enabled(nl, napi_id) -> None:    napi = nl.napi_get({'id': napi_id})    ksft_eq(napi['threaded'], 'enabled')    ksft_ne(napi.get('pid'), None)  def _assert_napi_threaded_disabled(nl, napi_id) -> None:    napi = nl.napi_get({'id': napi_id})    ksft_eq(napi['threaded'], 'disabled')    ksft_eq(napi.get('pid'), None)  def _set_threaded_state(cfg, threaded) -> None:    cmd(f"echo {threaded} > /sys/class/net/{cfg.ifname}/threaded")  def _setup_deferred_cleanup(cfg) -> None:    combined = ethtool(f"-l {cfg.ifname}", json=True)[0].get("combined", 0)    ksft_ge(combined, 2)    defer(ethtool, f"-L {cfg.ifname} combined {combined}")     threaded = cmd(f"cat /sys/class/net/{cfg.ifname}/threaded").stdout    defer(_set_threaded_state, cfg, threaded)     return combined  def enable_dev_threaded_disable_napi_threaded(cfg, nl) -> None:    """    Test that when napi threaded is enabled at device level and    then disabled at napi level for one napi, the threaded state    of all napis is preserved after a change in number of queues.    """     napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)    ksft_ge(len(napis), 2)     napi0_id = napis[0]['id']    napi1_id = napis[1]['id']     qcnt = _setup_deferred_cleanup(cfg)     # set threaded    _set_threaded_state(cfg, 1)     # check napi threaded is set for both napis    _assert_napi_threaded_enabled(nl, napi0_id)    _assert_napi_threaded_enabled(nl, napi1_id)     # disable threaded for napi1    nl.napi_set({'id': napi1_id, 'threaded': 'disabled'})     cmd(f"ethtool -L {cfg.ifname} combined 1")    cmd(f"ethtool -L {cfg.ifname} combined {qcnt}")    _assert_napi_threaded_enabled(nl, napi0_id)    _assert_napi_threaded_disabled(nl, napi1_id)  def change_num_queues(cfg, nl) -> None:    """    Test that when napi threaded is enabled at device level,    the napi threaded state is preserved after a change in    number of queues.    """     napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)    ksft_ge(len(napis), 2)     napi0_id = napis[0]['id']    napi1_id = napis[1]['id']     qcnt = _setup_deferred_cleanup(cfg)     # set threaded    _set_threaded_state(cfg, 1)     # check napi threaded is set for both napis    _assert_napi_threaded_enabled(nl, napi0_id)    _assert_napi_threaded_enabled(nl, napi1_id)     cmd(f"ethtool -L {cfg.ifname} combined 1")    cmd(f"ethtool -L {cfg.ifname} combined {qcnt}")     # check napi threaded is set for both napis    _assert_napi_threaded_enabled(nl, napi0_id)    _assert_napi_threaded_enabled(nl, napi1_id)  def main() -> None:    """ Ksft boiler plate main """     with NetDrvEnv(__file__, queue_count=2) as cfg:        ksft_run([change_num_queues,                  enable_dev_threaded_disable_napi_threaded],                 args=(cfg, NetdevFamily()))    ksft_exit()  if __name__ == "__main__":    main()