Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#!/usr/bin/env python3
2# SPDX-License-Identifier: GPL-2.0
3
4"""Run the tools/testing/selftests/net/csum testsuite."""
5
6from os import path
7
8from lib.py import ksft_run, ksft_exit, KsftSkipEx
9from lib.py import EthtoolFamily, NetDrvEpEnv
10from lib.py import bkg, cmd, wait_port_listen
11
12def test_receive(cfg, ipv4=False, extra_args=None):
13 """Test local nic checksum receive. Remote host sends crafted packets."""
14 if not cfg.have_rx_csum:
15 raise KsftSkipEx(f"Test requires rx checksum offload on {cfg.ifname}")
16
17 if ipv4:
18 ip_args = f"-4 -S {cfg.remote_v4} -D {cfg.v4}"
19 else:
20 ip_args = f"-6 -S {cfg.remote_v6} -D {cfg.v6}"
21
22 rx_cmd = f"{cfg.bin_local} -i {cfg.ifname} -n 100 {ip_args} -r 1 -R {extra_args}"
23 tx_cmd = f"{cfg.bin_remote} -i {cfg.ifname} -n 100 {ip_args} -r 1 -T {extra_args}"
24
25 with bkg(rx_cmd, exit_wait=True):
26 wait_port_listen(34000, proto="udp")
27 cmd(tx_cmd, host=cfg.remote)
28
29
30def test_transmit(cfg, ipv4=False, extra_args=None):
31 """Test local nic checksum transmit. Remote host verifies packets."""
32 if (not cfg.have_tx_csum_generic and
33 not (cfg.have_tx_csum_ipv4 and ipv4) and
34 not (cfg.have_tx_csum_ipv6 and not ipv4)):
35 raise KsftSkipEx(f"Test requires tx checksum offload on {cfg.ifname}")
36
37 if ipv4:
38 ip_args = f"-4 -S {cfg.v4} -D {cfg.remote_v4}"
39 else:
40 ip_args = f"-6 -S {cfg.v6} -D {cfg.remote_v6}"
41
42 # Cannot randomize input when calculating zero checksum
43 if extra_args != "-U -Z":
44 extra_args += " -r 1"
45
46 rx_cmd = f"{cfg.bin_remote} -i {cfg.ifname} -L 1 -n 100 {ip_args} -R {extra_args}"
47 tx_cmd = f"{cfg.bin_local} -i {cfg.ifname} -L 1 -n 100 {ip_args} -T {extra_args}"
48
49 with bkg(rx_cmd, host=cfg.remote, exit_wait=True):
50 wait_port_listen(34000, proto="udp", host=cfg.remote)
51 cmd(tx_cmd)
52
53
54def test_builder(name, cfg, ipv4=False, tx=False, extra_args=""):
55 """Construct specific tests from the common template.
56
57 Most tests follow the same basic pattern, differing only in
58 Direction of the test and optional flags passed to csum."""
59 def f(cfg):
60 if ipv4:
61 cfg.require_v4()
62 else:
63 cfg.require_v6()
64
65 if tx:
66 test_transmit(cfg, ipv4, extra_args)
67 else:
68 test_receive(cfg, ipv4, extra_args)
69
70 if ipv4:
71 f.__name__ = "ipv4_" + name
72 else:
73 f.__name__ = "ipv6_" + name
74 return f
75
76
77def check_nic_features(cfg) -> None:
78 """Test whether Tx and Rx checksum offload are enabled.
79
80 If the device under test has either off, then skip the relevant tests."""
81 cfg.have_tx_csum_generic = False
82 cfg.have_tx_csum_ipv4 = False
83 cfg.have_tx_csum_ipv6 = False
84 cfg.have_rx_csum = False
85
86 ethnl = EthtoolFamily()
87 features = ethnl.features_get({"header": {"dev-index": cfg.ifindex}})
88 for f in features["active"]["bits"]["bit"]:
89 if f["name"] == "tx-checksum-ip-generic":
90 cfg.have_tx_csum_generic = True
91 elif f["name"] == "tx-checksum-ipv4":
92 cfg.have_tx_csum_ipv4 = True
93 elif f["name"] == "tx-checksum-ipv6":
94 cfg.have_tx_csum_ipv6 = True
95 elif f["name"] == "rx-checksum":
96 cfg.have_rx_csum = True
97
98
99def main() -> None:
100 with NetDrvEpEnv(__file__, nsim_test=False) as cfg:
101 check_nic_features(cfg)
102
103 cfg.bin_local = path.abspath(path.dirname(__file__) + "/../../../net/lib/csum")
104 cfg.bin_remote = cfg.remote.deploy(cfg.bin_local)
105
106 cases = []
107 for ipv4 in [True, False]:
108 cases.append(test_builder("rx_tcp", cfg, ipv4, False, "-t"))
109 cases.append(test_builder("rx_tcp_invalid", cfg, ipv4, False, "-t -E"))
110
111 cases.append(test_builder("rx_udp", cfg, ipv4, False, ""))
112 cases.append(test_builder("rx_udp_invalid", cfg, ipv4, False, "-E"))
113
114 cases.append(test_builder("tx_udp_csum_offload", cfg, ipv4, True, "-U"))
115 cases.append(test_builder("tx_udp_zero_checksum", cfg, ipv4, True, "-U -Z"))
116
117 ksft_run(cases=cases, args=(cfg, ))
118 ksft_exit()
119
120
121if __name__ == "__main__":
122 main()