Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/usr/bin/env python3
2# SPDX-License-Identifier: GPL-2.0
3
4"""
5Tests for the netdev netlink family.
6"""
7
8import errno
9from os import system
10from lib.py import ksft_run, ksft_exit
11from lib.py import ksft_eq, ksft_ge, ksft_ne, ksft_raises, ksft_busy_wait
12from lib.py import NetdevFamily, NetdevSimDev, NlError, ip
13
14
15def empty_check(nf) -> None:
16 devs = nf.dev_get({}, dump=True)
17 ksft_ge(len(devs), 1)
18
19
20def lo_check(nf) -> None:
21 lo_info = nf.dev_get({"ifindex": 1})
22 ksft_eq(len(lo_info['xdp-features']), 0)
23 ksft_eq(len(lo_info['xdp-rx-metadata-features']), 0)
24
25
26def dev_dump_reject_attr(nf) -> None:
27 """Test that dev-get dump rejects attributes (no dump request policy)."""
28 with ksft_raises(NlError) as cm:
29 nf.dev_get({'ifindex': 1}, dump=True)
30 ksft_eq(cm.exception.nl_msg.error, -errno.EINVAL)
31 ksft_eq(cm.exception.nl_msg.extack['msg'], 'Unknown attribute type')
32 ksft_eq(cm.exception.nl_msg.extack['bad-attr'], '.ifindex')
33
34
35def napi_list_check(nf) -> None:
36 with NetdevSimDev(queue_count=100) as nsimdev:
37 nsim = nsimdev.nsims[0]
38
39 ip(f"link set dev {nsim.ifname} up")
40
41 napis = nf.napi_get({'ifindex': nsim.ifindex}, dump=True)
42 ksft_eq(len(napis), 100)
43
44 for q in [50, 0, 99]:
45 for i in range(4):
46 nsim.dfs_write("queue_reset", f"{q} {i}")
47 napis = nf.napi_get({'ifindex': nsim.ifindex}, dump=True)
48 ksft_eq(len(napis), 100,
49 comment=f"queue count after reset queue {q} mode {i}")
50
51def napi_set_threaded(nf) -> None:
52 """
53 Test that verifies various cases of napi threaded
54 set and unset at napi and device level.
55 """
56 with NetdevSimDev(queue_count=2) as nsimdev:
57 nsim = nsimdev.nsims[0]
58
59 ip(f"link set dev {nsim.ifname} up")
60
61 napis = nf.napi_get({'ifindex': nsim.ifindex}, dump=True)
62 ksft_eq(len(napis), 2)
63
64 napi0_id = napis[0]['id']
65 napi1_id = napis[1]['id']
66
67 # set napi threaded and verify
68 nf.napi_set({'id': napi0_id, 'threaded': "enabled"})
69 napi0 = nf.napi_get({'id': napi0_id})
70 ksft_eq(napi0['threaded'], "enabled")
71 ksft_ne(napi0.get('pid'), None)
72
73 # check it is not set for napi1
74 napi1 = nf.napi_get({'id': napi1_id})
75 ksft_eq(napi1['threaded'], "disabled")
76 ksft_eq(napi1.get('pid'), None)
77
78 ip(f"link set dev {nsim.ifname} down")
79 ip(f"link set dev {nsim.ifname} up")
80
81 # verify if napi threaded is still set
82 napi0 = nf.napi_get({'id': napi0_id})
83 ksft_eq(napi0['threaded'], "enabled")
84 ksft_ne(napi0.get('pid'), None)
85
86 # check it is still not set for napi1
87 napi1 = nf.napi_get({'id': napi1_id})
88 ksft_eq(napi1['threaded'], "disabled")
89 ksft_eq(napi1.get('pid'), None)
90
91 # unset napi threaded and verify
92 nf.napi_set({'id': napi0_id, 'threaded': "disabled"})
93 napi0 = nf.napi_get({'id': napi0_id})
94 ksft_eq(napi0['threaded'], "disabled")
95 ksft_eq(napi0.get('pid'), None)
96
97 # set threaded at device level
98 system(f"echo 1 > /sys/class/net/{nsim.ifname}/threaded")
99
100 # check napi threaded is set for both napis
101 napi0 = nf.napi_get({'id': napi0_id})
102 ksft_eq(napi0['threaded'], "enabled")
103 ksft_ne(napi0.get('pid'), None)
104 napi1 = nf.napi_get({'id': napi1_id})
105 ksft_eq(napi1['threaded'], "enabled")
106 ksft_ne(napi1.get('pid'), None)
107
108 # unset threaded at device level
109 system(f"echo 0 > /sys/class/net/{nsim.ifname}/threaded")
110
111 # check napi threaded is unset for both napis
112 napi0 = nf.napi_get({'id': napi0_id})
113 ksft_eq(napi0['threaded'], "disabled")
114 ksft_eq(napi0.get('pid'), None)
115 napi1 = nf.napi_get({'id': napi1_id})
116 ksft_eq(napi1['threaded'], "disabled")
117 ksft_eq(napi1.get('pid'), None)
118
119 # set napi threaded for napi0
120 nf.napi_set({'id': napi0_id, 'threaded': 1})
121 napi0 = nf.napi_get({'id': napi0_id})
122 ksft_eq(napi0['threaded'], "enabled")
123 ksft_ne(napi0.get('pid'), None)
124
125 # unset threaded at device level
126 system(f"echo 0 > /sys/class/net/{nsim.ifname}/threaded")
127
128 # check napi threaded is unset for both napis
129 napi0 = nf.napi_get({'id': napi0_id})
130 ksft_eq(napi0['threaded'], "disabled")
131 ksft_eq(napi0.get('pid'), None)
132 napi1 = nf.napi_get({'id': napi1_id})
133 ksft_eq(napi1['threaded'], "disabled")
134 ksft_eq(napi1.get('pid'), None)
135
136def dev_set_threaded(nf) -> None:
137 """
138 Test that verifies various cases of napi threaded
139 set and unset at device level using sysfs.
140 """
141 with NetdevSimDev(queue_count=2) as nsimdev:
142 nsim = nsimdev.nsims[0]
143
144 ip(f"link set dev {nsim.ifname} up")
145
146 napis = nf.napi_get({'ifindex': nsim.ifindex}, dump=True)
147 ksft_eq(len(napis), 2)
148
149 napi0_id = napis[0]['id']
150 napi1_id = napis[1]['id']
151
152 # set threaded
153 system(f"echo 1 > /sys/class/net/{nsim.ifname}/threaded")
154
155 # check napi threaded is set for both napis
156 napi0 = nf.napi_get({'id': napi0_id})
157 ksft_eq(napi0['threaded'], "enabled")
158 ksft_ne(napi0.get('pid'), None)
159 napi1 = nf.napi_get({'id': napi1_id})
160 ksft_eq(napi1['threaded'], "enabled")
161 ksft_ne(napi1.get('pid'), None)
162
163 # unset threaded
164 system(f"echo 0 > /sys/class/net/{nsim.ifname}/threaded")
165
166 # check napi threaded is unset for both napis
167 napi0 = nf.napi_get({'id': napi0_id})
168 ksft_eq(napi0['threaded'], "disabled")
169 ksft_eq(napi0.get('pid'), None)
170 napi1 = nf.napi_get({'id': napi1_id})
171 ksft_eq(napi1['threaded'], "disabled")
172 ksft_eq(napi1.get('pid'), None)
173
174def nsim_rxq_reset_down(nf) -> None:
175 """
176 Test that the queue API supports resetting a queue
177 while the interface is down. We should convert this
178 test to testing real HW once more devices support
179 queue API.
180 """
181 with NetdevSimDev(queue_count=4) as nsimdev:
182 nsim = nsimdev.nsims[0]
183
184 ip(f"link set dev {nsim.ifname} down")
185 for i in [0, 2, 3]:
186 nsim.dfs_write("queue_reset", f"1 {i}")
187
188
189def page_pool_check(nf) -> None:
190 with NetdevSimDev() as nsimdev:
191 nsim = nsimdev.nsims[0]
192
193 def up():
194 ip(f"link set dev {nsim.ifname} up")
195
196 def down():
197 ip(f"link set dev {nsim.ifname} down")
198
199 def get_pp():
200 pp_list = nf.page_pool_get({}, dump=True)
201 return [pp for pp in pp_list if pp.get("ifindex") == nsim.ifindex]
202
203 # No page pools when down
204 down()
205 ksft_eq(len(get_pp()), 0)
206
207 # Up, empty page pool appears
208 up()
209 pp_list = get_pp()
210 ksft_ge(len(pp_list), 0)
211 refs = sum([pp["inflight"] for pp in pp_list])
212 ksft_eq(refs, 0)
213
214 # Down, it disappears, again
215 down()
216 pp_list = get_pp()
217 ksft_eq(len(pp_list), 0)
218
219 # Up, allocate a page
220 up()
221 nsim.dfs_write("pp_hold", "y")
222 pp_list = nf.page_pool_get({}, dump=True)
223 refs = sum([pp["inflight"] for pp in pp_list if pp.get("ifindex") == nsim.ifindex])
224 ksft_ge(refs, 1)
225
226 # Now let's leak a page
227 down()
228 pp_list = get_pp()
229 ksft_eq(len(pp_list), 1)
230 refs = sum([pp["inflight"] for pp in pp_list])
231 ksft_eq(refs, 1)
232 attached = [pp for pp in pp_list if "detach-time" not in pp]
233 ksft_eq(len(attached), 0)
234
235 # New pp can get created, and we'll have two
236 up()
237 pp_list = get_pp()
238 attached = [pp for pp in pp_list if "detach-time" not in pp]
239 detached = [pp for pp in pp_list if "detach-time" in pp]
240 ksft_eq(len(attached), 1)
241 ksft_eq(len(detached), 1)
242
243 # Free the old page and the old pp is gone
244 nsim.dfs_write("pp_hold", "n")
245 # Freeing check is once a second so we may need to retry
246 ksft_busy_wait(lambda: len(get_pp()) == 1, deadline=2)
247
248 # And down...
249 down()
250 ksft_eq(len(get_pp()), 0)
251
252 # Last, leave the page hanging for destroy, nothing to check
253 # we're trying to exercise the orphaning path in the kernel
254 up()
255 nsim.dfs_write("pp_hold", "y")
256
257
258def main() -> None:
259 """ Ksft boiler plate main """
260 nf = NetdevFamily()
261 ksft_run([empty_check,
262 lo_check,
263 dev_dump_reject_attr,
264 napi_list_check,
265 napi_set_threaded,
266 dev_set_threaded,
267 nsim_rxq_reset_down,
268 page_pool_check],
269 args=(nf, ))
270 ksft_exit()
271
272
273if __name__ == "__main__":
274 main()