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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
from lib.py import ksft_disruptive, ksft_exit, ksft_run
from lib.py import ksft_eq, ksft_not_in, ksft_raises, KsftSkipEx, KsftFailEx
from lib.py import EthtoolFamily, NetdevFamily, NlError
from lib.py import NetDrvEnv
from lib.py import bkg, cmd, defer, ip
import errno
import glob
import os
import socket
import struct
def sys_get_queues(ifname, qtype='rx') -> int:
folders = glob.glob(f'/sys/class/net/{ifname}/queues/{qtype}-*')
return len(folders)
def nl_get_queues(cfg, nl, qtype='rx'):
queues = nl.queue_get({'ifindex': cfg.ifindex}, dump=True)
if queues:
return len([q for q in queues if q['type'] == qtype])
return None
def check_xsk(cfg, nl, xdp_queue_id=0) -> None:
# Probe for support
xdp = cmd(f'{cfg.test_dir / "xdp_helper"} - -', fail=False)
if xdp.ret == 255:
raise KsftSkipEx('AF_XDP unsupported')
elif xdp.ret > 0:
raise KsftFailEx('unable to create AF_XDP socket')
with bkg(f'{cfg.test_dir / "xdp_helper"} {cfg.ifindex} {xdp_queue_id}',
ksft_wait=3):
rx = tx = False
queues = nl.queue_get({'ifindex': cfg.ifindex}, dump=True)
if not queues:
raise KsftSkipEx("Netlink reports no queues")
for q in queues:
if q['id'] == 0:
if q['type'] == 'rx':
rx = True
if q['type'] == 'tx':
tx = True
ksft_eq(q.get('xsk', None), {},
comment="xsk attr on queue we configured")
else:
ksft_not_in('xsk', q,
comment="xsk attr on queue we didn't configure")
ksft_eq(rx, True)
ksft_eq(tx, True)
def get_queues(cfg, nl) -> None:
snl = NetdevFamily(recv_size=4096)
for qtype in ['rx', 'tx']:
queues = nl_get_queues(cfg, snl, qtype)
if not queues:
raise KsftSkipEx('queue-get not supported by device')
expected = sys_get_queues(cfg.dev['ifname'], qtype)
ksft_eq(queues, expected)
def addremove_queues(cfg, nl) -> None:
queues = nl_get_queues(cfg, nl)
if not queues:
raise KsftSkipEx('queue-get not supported by device')
curr_queues = sys_get_queues(cfg.dev['ifname'])
if curr_queues == 1:
raise KsftSkipEx('cannot decrement queue: already at 1')
netnl = EthtoolFamily()
channels = netnl.channels_get({'header': {'dev-index': cfg.ifindex}})
rx_type = 'rx'
if channels.get('combined-count', 0) > 0:
rx_type = 'combined'
expected = curr_queues - 1
cmd(f"ethtool -L {cfg.dev['ifname']} {rx_type} {expected}", timeout=10)
queues = nl_get_queues(cfg, nl)
ksft_eq(queues, expected)
expected = curr_queues
cmd(f"ethtool -L {cfg.dev['ifname']} {rx_type} {expected}", timeout=10)
queues = nl_get_queues(cfg, nl)
ksft_eq(queues, expected)
@ksft_disruptive
def check_down(cfg, nl) -> None:
# Check the NAPI IDs before interface goes down and hides them
napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)
ip(f"link set dev {cfg.dev['ifname']} down")
defer(ip, f"link set dev {cfg.dev['ifname']} up")
with ksft_raises(NlError) as cm:
nl.queue_get({'ifindex': cfg.ifindex, 'id': 0, 'type': 'rx'})
ksft_eq(cm.exception.nl_msg.error, -errno.ENOENT)
if napis:
with ksft_raises(NlError) as cm:
nl.napi_get({'id': napis[0]['id']})
ksft_eq(cm.exception.nl_msg.error, -errno.ENOENT)
def main() -> None:
with NetDrvEnv(__file__, queue_count=100) as cfg:
ksft_run([get_queues, addremove_queues, check_down, check_xsk],
args=(cfg, NetdevFamily()))
ksft_exit()
if __name__ == "__main__":
main()
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