tools/testing/selftests/drivers/net/napi_threaded.py

Source file repositories/reference/linux-study-clean/tools/testing/selftests/drivers/net/napi_threaded.py

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/drivers/net/napi_threaded.py
Extension
.py
Size
4109 bytes
Lines
144
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0

"""
Test napi threaded states.
"""

from lib.py import ksft_run, ksft_exit
from lib.py import ksft_eq, ksft_ne, ksft_ge
from lib.py import NetDrvEnv, NetdevFamily
from 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:
    with open(f"/sys/class/net/{cfg.ifname}/threaded", "wb") as fp:
        fp.write(str(threaded).encode('utf-8'))


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 napi_init(cfg, nl) -> None:
    """
    Test that threaded state (in the persistent NAPI config) gets updated
    even when NAPI with given ID is not allocated at the time.
    """

    qcnt = _setup_deferred_cleanup(cfg)

    _set_threaded_state(cfg, 1)
    cmd(f"ethtool -L {cfg.ifname} combined 1")
    _set_threaded_state(cfg, 0)
    cmd(f"ethtool -L {cfg.ifname} combined {qcnt}")

    napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)
    for napi in napis:
        ksft_eq(napi['threaded'], 'disabled')
        ksft_eq(napi.get('pid'), None)

    cmd(f"ethtool -L {cfg.ifname} combined 1")
    _set_threaded_state(cfg, 1)
    cmd(f"ethtool -L {cfg.ifname} combined {qcnt}")

    napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)
    for napi in napis:
        ksft_eq(napi['threaded'], 'enabled')
        ksft_ne(napi.get('pid'), None)


def enable_dev_threaded_disable_napi_threaded(cfg, nl) -> None:

Annotation

Implementation Notes