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"""
5Test napi threaded states.
6"""
7
8from lib.py import ksft_run, ksft_exit
9from lib.py import ksft_eq, ksft_ne, ksft_ge
10from lib.py import NetDrvEnv, NetdevFamily
11from lib.py import cmd, defer, ethtool
12
13
14def _assert_napi_threaded_enabled(nl, napi_id) -> None:
15 napi = nl.napi_get({'id': napi_id})
16 ksft_eq(napi['threaded'], 'enabled')
17 ksft_ne(napi.get('pid'), None)
18
19
20def _assert_napi_threaded_disabled(nl, napi_id) -> None:
21 napi = nl.napi_get({'id': napi_id})
22 ksft_eq(napi['threaded'], 'disabled')
23 ksft_eq(napi.get('pid'), None)
24
25
26def _set_threaded_state(cfg, threaded) -> None:
27 cmd(f"echo {threaded} > /sys/class/net/{cfg.ifname}/threaded")
28
29
30def _setup_deferred_cleanup(cfg) -> None:
31 combined = ethtool(f"-l {cfg.ifname}", json=True)[0].get("combined", 0)
32 ksft_ge(combined, 2)
33 defer(ethtool, f"-L {cfg.ifname} combined {combined}")
34
35 threaded = cmd(f"cat /sys/class/net/{cfg.ifname}/threaded").stdout
36 defer(_set_threaded_state, cfg, threaded)
37
38 return combined
39
40
41def enable_dev_threaded_disable_napi_threaded(cfg, nl) -> None:
42 """
43 Test that when napi threaded is enabled at device level and
44 then disabled at napi level for one napi, the threaded state
45 of all napis is preserved after a change in number of queues.
46 """
47
48 napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)
49 ksft_ge(len(napis), 2)
50
51 napi0_id = napis[0]['id']
52 napi1_id = napis[1]['id']
53
54 qcnt = _setup_deferred_cleanup(cfg)
55
56 # set threaded
57 _set_threaded_state(cfg, 1)
58
59 # check napi threaded is set for both napis
60 _assert_napi_threaded_enabled(nl, napi0_id)
61 _assert_napi_threaded_enabled(nl, napi1_id)
62
63 # disable threaded for napi1
64 nl.napi_set({'id': napi1_id, 'threaded': 'disabled'})
65
66 cmd(f"ethtool -L {cfg.ifname} combined 1")
67 cmd(f"ethtool -L {cfg.ifname} combined {qcnt}")
68 _assert_napi_threaded_enabled(nl, napi0_id)
69 _assert_napi_threaded_disabled(nl, napi1_id)
70
71
72def change_num_queues(cfg, nl) -> None:
73 """
74 Test that when napi threaded is enabled at device level,
75 the napi threaded state is preserved after a change in
76 number of queues.
77 """
78
79 napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)
80 ksft_ge(len(napis), 2)
81
82 napi0_id = napis[0]['id']
83 napi1_id = napis[1]['id']
84
85 qcnt = _setup_deferred_cleanup(cfg)
86
87 # set threaded
88 _set_threaded_state(cfg, 1)
89
90 # check napi threaded is set for both napis
91 _assert_napi_threaded_enabled(nl, napi0_id)
92 _assert_napi_threaded_enabled(nl, napi1_id)
93
94 cmd(f"ethtool -L {cfg.ifname} combined 1")
95 cmd(f"ethtool -L {cfg.ifname} combined {qcnt}")
96
97 # check napi threaded is set for both napis
98 _assert_napi_threaded_enabled(nl, napi0_id)
99 _assert_napi_threaded_enabled(nl, napi1_id)
100
101
102def main() -> None:
103 """ Ksft boiler plate main """
104
105 with NetDrvEnv(__file__, queue_count=2) as cfg:
106 ksft_run([change_num_queues,
107 enable_dev_threaded_disable_napi_threaded],
108 args=(cfg, NetdevFamily()))
109 ksft_exit()
110
111
112if __name__ == "__main__":
113 main()