1 /* $NetBSD: t_kevent.c,v 1.6 2012/11/29 09:13:44 martin 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 1.6 2012/11/29 09:13:44 martin 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/drvctlio.h> 47 #include <sys/event.h> 48 #include <sys/time.h> 49 #include <sys/socket.h> 50 #include <sys/wait.h> 51 52 ATF_TC(kevent_zerotimer); 53 ATF_TC_HEAD(kevent_zerotimer, tc) 54 { 55 atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer " 56 "does not crash the system (PR lib/45618)"); 57 } 58 59 ATF_TC_BODY(kevent_zerotimer, tc) 60 { 61 struct kevent ev; 62 int kq; 63 64 ATF_REQUIRE((kq = kqueue()) != -1); 65 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 66 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 67 ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1); 68 } 69 70 ATF_TC(kqueue_desc_passing); 71 ATF_TC_HEAD(kqueue_desc_passing, tc) 72 { 73 atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to " 74 "another process does not crash the kernel (PR 46463)"); 75 } 76 77 ATF_TC_BODY(kqueue_desc_passing, tc) 78 { 79 pid_t child; 80 int s[2], storage, status, kq; 81 struct cmsghdr *msg; 82 struct iovec iov; 83 struct msghdr m; 84 struct kevent ev; 85 86 ATF_REQUIRE((kq = kqueue()) != -1); 87 88 // atf_tc_skip("crashes kernel (PR 46463)"); 89 90 ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1); 91 msg = malloc(CMSG_SPACE(sizeof(int))); 92 m.msg_iov = &iov; 93 m.msg_iovlen = 1; 94 m.msg_name = NULL; 95 m.msg_namelen = 0; 96 m.msg_control = msg; 97 m.msg_controllen = CMSG_SPACE(sizeof(int)); 98 99 child = fork(); 100 if (child == 0) { 101 close(s[0]); 102 103 iov.iov_base = &storage; 104 iov.iov_len = sizeof(int); 105 m.msg_iov = &iov; 106 m.msg_iovlen = 1; 107 108 if (recvmsg(s[1], &m, 0) == -1) 109 err(1, "child: could not recvmsg"); 110 111 kq = *(int *)CMSG_DATA(msg); 112 printf("child (pid %d): received kq fd %d\n", getpid(), kq); 113 exit(0); 114 } 115 116 close(s[1]); 117 118 iov.iov_base = &storage; 119 iov.iov_len = sizeof(int); 120 121 msg->cmsg_level = SOL_SOCKET; 122 msg->cmsg_type = SCM_RIGHTS; 123 msg->cmsg_len = CMSG_LEN(sizeof(int)); 124 125 *(int *)CMSG_DATA(msg) = kq; 126 127 EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0); 128 ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1); 129 130 printf("parent (pid %d): sending kq fd %d\n", getpid(), kq); 131 if (sendmsg(s[0], &m, 0) == -1) { 132 ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno); 133 atf_tc_skip("PR kern/46523"); 134 } 135 136 close(kq); 137 138 waitpid(child, &status, 0); 139 ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0); 140 } 141 142 ATF_TC(kqueue_unsupported_fd); 143 ATF_TC_HEAD(kqueue_unsupported_fd, tc) 144 { 145 atf_tc_set_md_var(tc, "descr", "Checks that watching an fd whose" 146 " type is not supported does not crash the kernel"); 147 } 148 149 ATF_TC_BODY(kqueue_unsupported_fd, tc) 150 { 151 /* mqueue and semaphore use fnullop_kqueue also */ 152 int fd, kq; 153 struct kevent ev; 154 155 fd = open(DRVCTLDEV, O_RDONLY); 156 if (fd == -1 && errno == ENOENT) 157 atf_tc_skip("no " DRVCTLDEV " available for testing"); 158 ATF_REQUIRE(fd != -1); 159 ATF_REQUIRE((kq = kqueue()) != -1); 160 161 EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, 162 NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK| 163 NOTE_RENAME|NOTE_REVOKE, 0, 0); 164 165 ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1); 166 ATF_REQUIRE_ERRNO(EOPNOTSUPP, true); 167 168 (void)close(fd); 169 } 170 171 172 ATF_TP_ADD_TCS(tp) 173 { 174 175 ATF_TP_ADD_TC(tp, kevent_zerotimer); 176 ATF_TP_ADD_TC(tp, kqueue_desc_passing); 177 ATF_TP_ADD_TC(tp, kqueue_unsupported_fd); 178 179 return atf_no_error(); 180 } 181