tests/lib/libc/sys/t_kevent.c

   1 /*      $NetBSD: t_kevent.c,v 1.7 2015/02/05 13:55:37 isaki 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 1.7 2015/02/05 13:55:37 isaki 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) {
 157                 switch (errno) {
 158                 case ENOENT:
 159                 case ENXIO:
 160                         atf_tc_skip("no " DRVCTLDEV " available for testing");
 161                         break;
 162                 }
 163         }
 164         ATF_REQUIRE(fd != -1);
 165         ATF_REQUIRE((kq = kqueue()) != -1);
 166
 167         EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR,
 168            NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK|
 169            NOTE_RENAME|NOTE_REVOKE, 0, 0);
 170
 171         ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1);
 172         ATF_REQUIRE_ERRNO(EOPNOTSUPP, true);
 173
 174         (void)close(fd);
 175 }
 176
 177
 178 ATF_TP_ADD_TCS(tp)
 179 {
 180
 181         ATF_TP_ADD_TC(tp, kevent_zerotimer);
 182         ATF_TP_ADD_TC(tp, kqueue_desc_passing);
 183         ATF_TP_ADD_TC(tp, kqueue_unsupported_fd);
 184
 185         return atf_no_error();
 186 }