1/*	$NetBSD: t_kevent.c,v 1.1 2011/11/17 01:14:12 christos Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundatiom
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_kevent.c,v 1.1 2011/11/17 01:14:12 christos Exp $");
33
34#include <sys/types.h>
35#include <sys/event.h>
36
37#include <atf-c.h>
38#include <errno.h>
39#include <time.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44#include <fcntl.h>
45#include <err.h>
46#include <sys/event.h>
47#include <sys/time.h>
48#include <sys/socket.h>
49#include <sys/wait.h>
50
51ATF_TC(kevent_zerotimer);
52ATF_TC_HEAD(kevent_zerotimer, tc)
53{
54	atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer "
55	    "does not crash the system (PR lib/45618)");
56}
57
58ATF_TC_BODY(kevent_zerotimer, tc)
59{
60	struct kevent ev;
61	int kq;
62
63	ATF_REQUIRE((kq = kqueue()) != -1);
64	EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0);
65	ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1);
66	ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1);
67}
68
69ATF_TC(kqueue_desc_passing);
70ATF_TC_HEAD(kqueue_desc_passing, tc)
71{
72	atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to "
73		"another process does not crash the kernel (PR 46463)");
74}
75
76ATF_TC_BODY(kqueue_desc_passing, tc)
77{
78	pid_t child;
79	int s[2], storage, status, kq;
80	struct cmsghdr *msg;
81	struct iovec iov;
82	struct msghdr m;
83	struct kevent ev;
84
85	ATF_REQUIRE((kq = kqueue()) != -1);
86
87	// atf_tc_skip("crashes kernel (PR 46463)");
88
89	ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1);
90	msg = malloc(CMSG_SPACE(sizeof(int)));
91	m.msg_iov = &iov;
92	m.msg_iovlen = 1;
93	m.msg_name = NULL;
94	m.msg_namelen = 0;
95	m.msg_control = msg;
96	m.msg_controllen = CMSG_SPACE(sizeof(int));
97
98	child = fork();
99	if (child == 0) {
100		close(s[0]);
101
102		iov.iov_base = &storage;
103		iov.iov_len = sizeof(int);
104		m.msg_iov = &iov;
105		m.msg_iovlen = 1;
106
107		if (recvmsg(s[1], &m, 0) == -1)
108			err(1, "child: could not recvmsg");
109
110		kq = *(int *)CMSG_DATA(msg);
111		printf("child (pid %d): received kq fd %d\n", getpid(), kq);
112		exit(0);
113	}
114
115	close(s[1]);
116
117	iov.iov_base = &storage;
118	iov.iov_len = sizeof(int);
119
120	msg->cmsg_level = SOL_SOCKET;
121	msg->cmsg_type = SCM_RIGHTS;
122	msg->cmsg_len = CMSG_LEN(sizeof(int));
123
124	*(int *)CMSG_DATA(msg) = kq;
125
126	EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0);
127	ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1);
128
129	printf("parent (pid %d): sending kq fd %d\n", getpid(), kq);
130	if (sendmsg(s[0], &m, 0) == -1) {
131		ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno);
132		atf_tc_skip("PR kern/46523");
133	}
134
135	close(kq);
136
137	waitpid(child, &status, 0);
138	ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0);
139}
140
141ATF_TC(kqueue_unsupported_fd);
142ATF_TC_HEAD(kqueue_unsupported_fd, tc)
143{
144	atf_tc_set_md_var(tc, "descr", "Checks that watching an fd whose"
145	    " type is not supported does not crash the kernel");
146}
147
148ATF_TC_BODY(kqueue_unsupported_fd, tc)
149{
150	/* mqueue and semaphore use fnullop_kqueue also */
151	static const char drvctl[] = "/dev/drvctl";
152	int fd, kq;
153	struct kevent ev;
154
155	ATF_REQUIRE((fd = open(drvctl, O_RDONLY)) != -1);
156	ATF_REQUIRE((kq = kqueue()) != -1);
157
158	EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR,
159	   NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK|
160	   NOTE_RENAME|NOTE_REVOKE, 0, 0);
161
162	ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1);
163	ATF_REQUIRE_ERRNO(EOPNOTSUPP, true);
164
165	(void)close(fd);
166}
167
168
169ATF_TP_ADD_TCS(tp)
170{
171
172	ATF_TP_ADD_TC(tp, kevent_zerotimer);
173	ATF_TP_ADD_TC(tp, kqueue_desc_passing);
174	ATF_TP_ADD_TC(tp, kqueue_unsupported_fd);
175
176	return atf_no_error();
177}
178