1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2016 Fujitsu Ltd.
4 * Author: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
5 * Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Check that epoll_wait(2) timeouts correctly.
12 */
13
14 #include <sys/epoll.h>
15 #include <unistd.h>
16 #include <errno.h>
17
18 #include "tst_timer_test.h"
19
20 static int epfd, fds[2];
21 static struct epoll_event epevs[1] = {
22 {.events = EPOLLIN}
23 };
24
sample_fn(int clk_id,long long usec)25 int sample_fn(int clk_id, long long usec)
26 {
27 unsigned int sleep_ms = usec / 1000;
28
29 tst_timer_start(clk_id);
30 TEST(epoll_wait(epfd, epevs, 1, sleep_ms));
31 tst_timer_stop();
32 tst_timer_sample();
33
34 if (TST_RET != 0) {
35 tst_res(TFAIL | TTERRNO, "epoll_wait() returned %li", TST_RET);
36 return 1;
37 }
38
39 return 0;
40 }
41
setup(void)42 static void setup(void)
43 {
44 SAFE_PIPE(fds);
45
46 epfd = epoll_create(1);
47 if (epfd == -1)
48 tst_brk(TBROK | TERRNO, "epoll_create()");
49
50 epevs[0].data.fd = fds[0];
51
52 if (epoll_ctl(epfd, EPOLL_CTL_ADD, fds[0], &epevs[0]))
53 tst_brk(TBROK | TERRNO, "epoll_ctl(..., EPOLL_CTL_ADD, ...)");
54 }
55
cleanup(void)56 static void cleanup(void)
57 {
58 if (epfd > 0)
59 SAFE_CLOSE(epfd);
60
61 if (fds[0] > 0)
62 SAFE_CLOSE(fds[0]);
63
64 if (fds[1] > 0)
65 SAFE_CLOSE(fds[1]);
66 }
67
68 static struct tst_test test = {
69 .scall = "epoll_wait()",
70 .sample = sample_fn,
71 .setup = setup,
72 .cleanup = cleanup,
73 };
74