1 /*- 2 * Copyright (c) 2014 EMC Corp. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <errno.h> 32 #include <fcntl.h> 33 #include <signal.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <strings.h> 37 #include <sys/limits.h> 38 #include <sys/stat.h> 39 #include <sys/sysctl.h> 40 #include <unistd.h> 41 #include <atf-c.h> 42 43 static volatile sig_atomic_t done; 44 45 #define AFILE "afile" 46 #define EXPANDBY 1000 47 #define PARALLEL 4 48 #define RENDEZVOUS "rendezvous" 49 #define VALUE "value" 50 51 ATF_TC_WITHOUT_HEAD(dup2__simple); 52 ATF_TC_BODY(dup2__simple, tc) 53 { 54 int fd1, fd2; 55 struct stat sb1, sb2; 56 57 ATF_REQUIRE((fd1 = open(AFILE, O_CREAT, 0644)) != -1); 58 fd2 = 27; 59 ATF_REQUIRE(dup2(fd1, fd2) != -1); 60 ATF_REQUIRE(fstat(fd1, &sb1) != -1); 61 ATF_REQUIRE(fstat(fd2, &sb2) != -1); 62 ATF_REQUIRE(bcmp(&sb1, &sb2, sizeof(sb1)) == 0); 63 } 64 65 ATF_TC(dup2__ebadf_when_2nd_arg_out_of_range); 66 ATF_TC_HEAD(dup2__ebadf_when_2nd_arg_out_of_range, tc) 67 { 68 atf_tc_set_md_var(tc, "descr", "Regression test for r234131"); 69 } 70 71 ATF_TC_BODY(dup2__ebadf_when_2nd_arg_out_of_range, tc) 72 { 73 int fd1, fd2, ret; 74 75 ATF_REQUIRE((fd1 = open(AFILE, O_CREAT, 0644)) != -1); 76 fd2 = INT_MAX; 77 ret = dup2(fd1, fd2); 78 ATF_CHECK_EQ(-1, ret); 79 ATF_CHECK_EQ(EBADF, errno); 80 } 81 82 static void 83 handler(int s __unused) 84 { 85 done++; 86 } 87 88 static void 89 openfiles2(size_t n) 90 { 91 size_t i; 92 int r; 93 94 errno = 0; 95 for (i = 0; i < n; i++) 96 ATF_REQUIRE((r = open(AFILE, O_RDONLY)) != -1); 97 kill(getppid(), SIGUSR1); 98 99 for (;;) { 100 if (access(RENDEZVOUS, R_OK) != 0) 101 break; 102 usleep(1000); 103 } 104 _exit(0); 105 } 106 107 static void 108 openfiles(size_t n) 109 { 110 int i, fd; 111 112 signal(SIGUSR1, handler); 113 ATF_REQUIRE((fd = open(AFILE, O_CREAT, 0644)) != -1); 114 close(fd); 115 ATF_REQUIRE((fd = open(RENDEZVOUS, O_CREAT, 0644)) != -1); 116 close(fd); 117 done = 0; 118 for (i = 0; i < PARALLEL; i++) 119 if (fork() == 0) 120 openfiles2(n / PARALLEL); 121 while (done != PARALLEL) 122 usleep(1000); 123 unlink(RENDEZVOUS); 124 usleep(40000); 125 } 126 127 ATF_TC_WITH_CLEANUP(kern_maxfiles__increase); 128 ATF_TC_HEAD(kern_maxfiles__increase, tc) 129 { 130 atf_tc_set_md_var(tc, "require.user", "root"); 131 atf_tc_set_md_var(tc, "require.config", "allow_sysctl_side_effects"); 132 atf_tc_set_md_var(tc, "descr", 133 "Check kern.maxfiles expansion"); 134 } 135 136 ATF_TC_BODY(kern_maxfiles__increase, tc) 137 { 138 size_t oldlen; 139 int maxfiles, oldmaxfiles, current; 140 char buf[80]; 141 142 oldlen = sizeof(maxfiles); 143 if (sysctlbyname("kern.maxfiles", &maxfiles, &oldlen, NULL, 0) == -1) 144 atf_tc_fail("getsysctlbyname(%s): %s", "kern.maxfiles", 145 strerror(errno)); 146 if (sysctlbyname("kern.openfiles", ¤t, &oldlen, NULL, 0) == -1) 147 atf_tc_fail("getsysctlbyname(%s): %s", "kern.openfiles", 148 strerror(errno)); 149 150 oldmaxfiles = maxfiles; 151 152 /* Store old kern.maxfiles in a symlink for cleanup */ 153 snprintf(buf, sizeof(buf), "%d", oldmaxfiles); 154 if (symlink(buf, VALUE) == 1) 155 atf_tc_fail("symlink(%s, %s): %s", buf, VALUE, 156 strerror(errno)); 157 158 maxfiles += EXPANDBY; 159 if (sysctlbyname("kern.maxfiles", NULL, 0, &maxfiles, oldlen) == -1) 160 atf_tc_fail("getsysctlbyname(%s): %s", "kern.maxfiles", 161 strerror(errno)); 162 163 openfiles(oldmaxfiles - current + 1); 164 (void)unlink(VALUE); 165 } 166 167 ATF_TC_CLEANUP(kern_maxfiles__increase, tc) 168 { 169 size_t oldlen; 170 int n, oldmaxfiles; 171 char buf[80]; 172 173 if ((n = readlink(VALUE, buf, sizeof(buf))) > 0) { 174 buf[MIN((size_t)n, sizeof(buf) - 1)] = '\0'; 175 if (sscanf(buf, "%d", &oldmaxfiles) == 1) { 176 oldlen = sizeof(oldmaxfiles); 177 (void) sysctlbyname("kern.maxfiles", NULL, 0, 178 &oldmaxfiles, oldlen); 179 } 180 } 181 } 182 183 ATF_TP_ADD_TCS(tp) 184 { 185 186 ATF_TP_ADD_TC(tp, dup2__simple); 187 ATF_TP_ADD_TC(tp, dup2__ebadf_when_2nd_arg_out_of_range); 188 ATF_TP_ADD_TC(tp, kern_maxfiles__increase); 189 190 return (atf_no_error()); 191 } 192