1 // SPDX-License-Identifier: GPL-2.0-or-later
3 /* Basic per-epoll context busy poll test.
5  * Only tests the ioctls, but should be expanded to test two connected hosts in
55 	EXPECT_NE(-1, ret)  in FIXTURE_SETUP()
58 	self->invalid_fd = ret;  in FIXTURE_SETUP()
65 	ret = close(self->invalid_fd);  in FIXTURE_TEARDOWN()
73 	ret = ioctl(self->invalid_fd, EPIOCGPARAMS, &self->params);  in TEST_F()
75 	EXPECT_EQ(-1, ret)  in TEST_F()
81 	memset(&self->params, 0, sizeof(struct epoll_params));  in TEST_F()
83 	ret = ioctl(self->invalid_fd, EPIOCSPARAMS, &self->params);  in TEST_F()
85 	EXPECT_EQ(-1, ret)  in TEST_F()
105 	EXPECT_NE(-1, ret)  in FIXTURE_SETUP()
108 	self->fd = ret;  in FIXTURE_SETUP()
110 	self->caps = cap_get_proc();  in FIXTURE_SETUP()
111 	EXPECT_NE(NULL, self->caps);  in FIXTURE_SETUP()
118 	ret = close(self->fd);  in FIXTURE_TEARDOWN()
121 	ret = cap_free(self->caps);  in FIXTURE_TEARDOWN()
122 	EXPECT_NE(-1, ret)  in FIXTURE_TEARDOWN()
131 	 * kernel, so set params fields to garbage to test this.  in TEST_F()
135 	self->params.busy_poll_usecs = 0xff;  in TEST_F()
136 	self->params.busy_poll_budget = 0xff;  in TEST_F()
137 	self->params.prefer_busy_poll = 1;  in TEST_F()
138 	self->params.__pad = 0xf;  in TEST_F()
140 	ret = ioctl(self->fd, EPIOCGPARAMS, &self->params);  in TEST_F()
144 	EXPECT_EQ(0, self->params.busy_poll_usecs)  in TEST_F()
147 	EXPECT_EQ(0, self->params.busy_poll_budget)  in TEST_F()
150 	EXPECT_EQ(0, self->params.prefer_busy_poll)  in TEST_F()
153 	EXPECT_EQ(0, self->params.__pad)  in TEST_F()
156 	self->invalid_params = (struct epoll_params *)0xdeadbeef;  in TEST_F()
157 	ret = ioctl(self->fd, EPIOCGPARAMS, self->invalid_params);  in TEST_F()
159 	EXPECT_EQ(-1, ret)  in TEST_F()
170 	memset(&self->params, 0, sizeof(struct epoll_params));  in TEST_F()
172 	self->params.__pad = 1;  in TEST_F()
174 	ret = ioctl(self->fd, EPIOCSPARAMS, &self->params);  in TEST_F()
176 	EXPECT_EQ(-1, ret)  in TEST_F()
177 		TH_LOG("EPIOCSPARAMS non-zero __pad should error");  in TEST_F()
180 		TH_LOG("EPIOCSPARAMS non-zero __pad errno should be EINVAL");  in TEST_F()
182 	self->params.__pad = 0;  in TEST_F()
183 	self->params.busy_poll_usecs = (uint32_t)INT_MAX + 1;  in TEST_F()
185 	ret = ioctl(self->fd, EPIOCSPARAMS, &self->params);  in TEST_F()
187 	EXPECT_EQ(-1, ret)  in TEST_F()
193 	self->params.__pad = 0;  in TEST_F()
194 	self->params.busy_poll_usecs = 32;  in TEST_F()
195 	self->params.prefer_busy_poll = 2;  in TEST_F()
197 	ret = ioctl(self->fd, EPIOCSPARAMS, &self->params);  in TEST_F()
199 	EXPECT_EQ(-1, ret)  in TEST_F()
205 	self->params.__pad = 0;  in TEST_F()
206 	self->params.busy_poll_usecs = 32;  in TEST_F()
207 	self->params.prefer_busy_poll = 1;  in TEST_F()
210 	self->params.busy_poll_budget = UINT16_MAX;  in TEST_F()
212 	/* test harness should run with CAP_NET_ADMIN, but let's make sure */  in TEST_F()
215 	ret = cap_get_flag(self->caps, CAP_NET_ADMIN, CAP_EFFECTIVE, &tmp);  in TEST_F()
220 		TH_LOG("expecting CAP_NET_ADMIN to be set for the test harness");  in TEST_F()
225 	ret = ioctl(self->fd, EPIOCSPARAMS, &self->params);  in TEST_F()
233 	ret = cap_set_flag(self->caps, CAP_EFFECTIVE, 1, net_admin, CAP_CLEAR);  in TEST_F()
237 	ret = cap_set_proc(self->caps);  in TEST_F()
242 	ret = ioctl(self->fd, EPIOCSPARAMS, &self->params);  in TEST_F()
244 	EXPECT_EQ(-1, ret)  in TEST_F()
251 	ret = cap_set_flag(self->caps, CAP_EFFECTIVE, 1, net_admin, CAP_SET);  in TEST_F()
255 	ret = cap_set_proc(self->caps);  in TEST_F()
259 	self->invalid_params = (struct epoll_params *)0xdeadbeef;  in TEST_F()
260 	ret = ioctl(self->fd, EPIOCSPARAMS, self->invalid_params);  in TEST_F()
262 	EXPECT_EQ(-1, ret)  in TEST_F()
273 	memset(&self->params, 0, sizeof(struct epoll_params));  in TEST_F()
275 	self->params.busy_poll_usecs = 25;  in TEST_F()
276 	self->params.busy_poll_budget = 16;  in TEST_F()
277 	self->params.prefer_busy_poll = 1;  in TEST_F()
279 	ret = ioctl(self->fd, EPIOCSPARAMS, &self->params);  in TEST_F()
286 	memset(&self->params, 0, sizeof(struct epoll_params));  in TEST_F()
288 	ret = ioctl(self->fd, EPIOCGPARAMS, &self->params);  in TEST_F()
293 	EXPECT_EQ(25, self->params.busy_poll_usecs)  in TEST_F()
296 	EXPECT_EQ(16, self->params.busy_poll_budget)  in TEST_F()
299 	EXPECT_EQ(1, self->params.prefer_busy_poll)  in TEST_F()
302 	EXPECT_EQ(0, self->params.__pad)  in TEST_F()
311 	ret = ioctl(self->fd, invalid_ioctl, &self->params);  in TEST_F()
313 	EXPECT_EQ(-1, ret)  in TEST_F()