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
39def enable_dev_threaded_disable_napi_threaded(cfg, nl) -> None:
40 """
41 Test that when napi threaded is enabled at device level and
42 then disabled at napi level for one napi, the threaded state
43 of all napis is preserved after a change in number of queues.
44 """
45
46 napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)
47 ksft_ge(len(napis), 2)
48
49 napi0_id = napis[0]['id']
50 napi1_id = napis[1]['id']
51
52 _setup_deferred_cleanup(cfg)
53
54 # set threaded
55 _set_threaded_state(cfg, 1)
56
57 # check napi threaded is set for both napis
58 _assert_napi_threaded_enabled(nl, napi0_id)
59 _assert_napi_threaded_enabled(nl, napi1_id)
60
61 # disable threaded for napi1
62 nl.napi_set({'id': napi1_id, 'threaded': 'disabled'})
63
64 cmd(f"ethtool -L {cfg.ifname} combined 1")
65 cmd(f"ethtool -L {cfg.ifname} combined 2")
66 _assert_napi_threaded_enabled(nl, napi0_id)
67 _assert_napi_threaded_disabled(nl, napi1_id)
68
69
70def change_num_queues(cfg, nl) -> None:
71 """
72 Test that when napi threaded is enabled at device level,
73 the napi threaded state is preserved after a change in
74 number of queues.
75 """
76
77 napis = nl.napi_get({'ifindex': cfg.ifindex}, dump=True)
78 ksft_ge(len(napis), 2)
79
80 napi0_id = napis[0]['id']
81 napi1_id = napis[1]['id']
82
83 _setup_deferred_cleanup(cfg)
84
85 # set threaded
86 _set_threaded_state(cfg, 1)
87
88 # check napi threaded is set for both napis
89 _assert_napi_threaded_enabled(nl, napi0_id)
90 _assert_napi_threaded_enabled(nl, napi1_id)
91
92 cmd(f"ethtool -L {cfg.ifname} combined 1")
93 cmd(f"ethtool -L {cfg.ifname} combined 2")
94
95 # check napi threaded is set for both napis
96 _assert_napi_threaded_enabled(nl, napi0_id)
97 _assert_napi_threaded_enabled(nl, napi1_id)
98
99
100def main() -> None:
101 """ Ksft boiler plate main """
102
103 with NetDrvEnv(__file__, queue_count=2) as cfg:
104 ksft_run([change_num_queues,
105 enable_dev_threaded_disable_napi_threaded],
106 args=(cfg, NetdevFamily()))
107 ksft_exit()
108
109
110if __name__ == "__main__":
111 main()