1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) Linux Test Project, 2021
4 * Author: Xie Ziyao <ziyaoxie@outlook.com>
5 */
6
7 /*\
8 * [Description]
9 *
10 * Check that epoll_ctl returns zero with different combinations of events on
11 * success.
12 */
13
14 #include <poll.h>
15 #include <sys/epoll.h>
16
17 #include "tst_test.h"
18 #include "tst_bitmap.h"
19
20 #define NUM_EPOLL_EVENTS 8
21 #define WIDTH_EPOLL_EVENTS 256
22
23 static int epfd, fds[2];
24 static struct epoll_event events = {.events = EPOLLIN};
25
26 static unsigned int events_type[NUM_EPOLL_EVENTS] = {
27 EPOLLIN, EPOLLOUT, EPOLLPRI, EPOLLERR,
28 EPOLLHUP, EPOLLET, EPOLLONESHOT, EPOLLRDHUP
29 };
30
run_all(void)31 static void run_all(void)
32 {
33 unsigned int i, j, events_bitmap;
34
35 for (i = 0; i < WIDTH_EPOLL_EVENTS; i++) {
36 events_bitmap = 0;
37
38 for (j = 0; j < NUM_EPOLL_EVENTS; j++)
39 events_bitmap |= (events_type[j] * TST_IS_BIT_SET(i, j));
40
41 events.events = events_bitmap;
42 TST_EXP_PASS(epoll_ctl(epfd, EPOLL_CTL_MOD, fds[0], &events),
43 "epoll_ctl(..., EPOLL_CTL_MOD, ...) with events.events=%08x",
44 events.events);
45 }
46 }
47
setup(void)48 static void setup(void)
49 {
50 epfd = epoll_create(1);
51 if (epfd == -1)
52 tst_brk(TBROK | TERRNO, "fail to create epoll instance");
53
54 SAFE_PIPE(fds);
55 events.data.fd = fds[0];
56
57 if (epoll_ctl(epfd, EPOLL_CTL_ADD, fds[0], &events))
58 tst_brk(TBROK | TERRNO, "epoll_ctl(..., EPOLL_CTL_ADD, ...)");
59 }
60
cleanup(void)61 static void cleanup(void)
62 {
63 if (epfd)
64 SAFE_CLOSE(epfd);
65
66 if (fds[0])
67 SAFE_CLOSE(fds[0]);
68
69 if (fds[1])
70 SAFE_CLOSE(fds[1]);
71 }
72
73 static struct tst_test test = {
74 .setup = setup,
75 .cleanup = cleanup,
76 .test_all = run_all,
77 };
78