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 <sys/limits.h> 32 #include <sys/resource.h> 33 #include <sys/stat.h> 34 #include <sys/sysctl.h> 35 #include <sys/time.h> 36 #include <sys/wait.h> 37 38 #include <errno.h> 39 #include <fcntl.h> 40 #include <signal.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <strings.h> 45 #include <unistd.h> 46 47 #include <atf-c.h> 48 49 static volatile sig_atomic_t done; 50 51 #define AFILE "afile" 52 #define EXPANDBY 1000 53 #define PARALLEL 4 54 #define RENDEZVOUS "rendezvous" 55 #define VALUE "value" 56 57 ATF_TC_WITHOUT_HEAD(dup2__simple); 58 ATF_TC_BODY(dup2__simple, tc) 59 { 60 int fd1, fd2; 61 struct stat sb1, sb2; 62 63 ATF_REQUIRE((fd1 = open(AFILE, O_CREAT, 0644)) != -1); 64 fd2 = 27; 65 ATF_REQUIRE(dup2(fd1, fd2) != -1); 66 ATF_REQUIRE(fstat(fd1, &sb1) != -1); 67 ATF_REQUIRE(fstat(fd2, &sb2) != -1); 68 ATF_REQUIRE(bcmp(&sb1, &sb2, sizeof(sb1)) == 0); 69 } 70 71 ATF_TC(dup2__ebadf_when_2nd_arg_out_of_range); 72 ATF_TC_HEAD(dup2__ebadf_when_2nd_arg_out_of_range, tc) 73 { 74 atf_tc_set_md_var(tc, "descr", "Regression test for r234131"); 75 } 76 77 ATF_TC_BODY(dup2__ebadf_when_2nd_arg_out_of_range, tc) 78 { 79 int fd1, fd2, ret; 80 81 ATF_REQUIRE((fd1 = open(AFILE, O_CREAT, 0644)) != -1); 82 fd2 = INT_MAX; 83 ret = dup2(fd1, fd2); 84 ATF_CHECK_EQ(-1, ret); 85 ATF_CHECK_EQ(EBADF, errno); 86 } 87 88 static void 89 handler(int s __unused) 90 { 91 done++; 92 } 93 94 static void 95 openfiles2(size_t n) 96 { 97 size_t i; 98 int r; 99 100 errno = 0; 101 for (i = 0; i < n; i++) { 102 r = open(AFILE, O_RDONLY); 103 if (r < 0) { 104 fprintf(stderr, "open: %s\n", strerror(errno)); 105 _exit(1); 106 } 107 } 108 kill(getppid(), SIGUSR1); 109 110 for (;;) { 111 if (access(RENDEZVOUS, R_OK) != 0) 112 break; 113 usleep(1000); 114 } 115 _exit(0); 116 } 117 118 static void 119 openfiles(size_t n) 120 { 121 int i, fd; 122 123 signal(SIGUSR1, handler); 124 ATF_REQUIRE((fd = open(AFILE, O_CREAT, 0644)) != -1); 125 close(fd); 126 ATF_REQUIRE((fd = open(RENDEZVOUS, O_CREAT, 0644)) != -1); 127 close(fd); 128 done = 0; 129 for (i = 0; i < PARALLEL; i++) 130 if (fork() == 0) 131 openfiles2(n / PARALLEL); 132 while (done != PARALLEL) { 133 usleep(1000); 134 ATF_REQUIRE_EQ_MSG(0, waitpid(-1, NULL, WNOHANG), 135 "a child exited unexpectedly"); 136 } 137 unlink(RENDEZVOUS); 138 for (i = 0; i < PARALLEL; i++) 139 ATF_CHECK_MSG(wait(NULL) > 0, "wait: %s", strerror(errno)); 140 } 141 142 ATF_TC_WITH_CLEANUP(kern_maxfiles__increase); 143 ATF_TC_HEAD(kern_maxfiles__increase, tc) 144 { 145 atf_tc_set_md_var(tc, "require.user", "root"); 146 atf_tc_set_md_var(tc, "require.config", "allow_sysctl_side_effects"); 147 atf_tc_set_md_var(tc, "descr", 148 "Check kern.maxfiles expansion"); 149 } 150 151 ATF_TC_BODY(kern_maxfiles__increase, tc) 152 { 153 size_t oldlen; 154 int maxfiles, oldmaxfiles, current; 155 char buf[80]; 156 struct rlimit rl; 157 158 oldlen = sizeof(maxfiles); 159 if (sysctlbyname("kern.maxfiles", &maxfiles, &oldlen, NULL, 0) == -1) 160 atf_tc_fail("getsysctlbyname(%s): %s", "kern.maxfiles", 161 strerror(errno)); 162 if (sysctlbyname("kern.openfiles", ¤t, &oldlen, NULL, 0) == -1) 163 atf_tc_fail("getsysctlbyname(%s): %s", "kern.openfiles", 164 strerror(errno)); 165 166 oldmaxfiles = maxfiles; 167 168 /* Store old kern.maxfiles in a symlink for cleanup */ 169 snprintf(buf, sizeof(buf), "%d", oldmaxfiles); 170 if (symlink(buf, VALUE) == 1) 171 atf_tc_fail("symlink(%s, %s): %s", buf, VALUE, 172 strerror(errno)); 173 174 maxfiles += EXPANDBY; 175 if (sysctlbyname("kern.maxfiles", NULL, 0, &maxfiles, oldlen) == -1) 176 atf_tc_fail("getsysctlbyname(%s): %s", "kern.maxfiles", 177 strerror(errno)); 178 179 rl.rlim_cur = rl.rlim_max = maxfiles; 180 ATF_REQUIRE_EQ_MSG(0, setrlimit(RLIMIT_NOFILE, &rl), 181 "setrlimit(RLIMIT_NOFILE, %d): %s", maxfiles, strerror(errno)); 182 183 openfiles(oldmaxfiles - current + EXPANDBY / 2); 184 } 185 186 ATF_TC_CLEANUP(kern_maxfiles__increase, tc) 187 { 188 size_t oldlen; 189 int n, oldmaxfiles; 190 char buf[80]; 191 192 if ((n = readlink(VALUE, buf, sizeof(buf))) > 0) { 193 buf[MIN((size_t)n, sizeof(buf) - 1)] = '\0'; 194 if (sscanf(buf, "%d", &oldmaxfiles) == 1) { 195 oldlen = sizeof(oldmaxfiles); 196 (void) sysctlbyname("kern.maxfiles", NULL, 0, 197 &oldmaxfiles, oldlen); 198 } 199 } 200 (void)unlink(VALUE); 201 (void)unlink(AFILE); 202 } 203 204 ATF_TP_ADD_TCS(tp) 205 { 206 207 ATF_TP_ADD_TC(tp, dup2__simple); 208 ATF_TP_ADD_TC(tp, dup2__ebadf_when_2nd_arg_out_of_range); 209 ATF_TP_ADD_TC(tp, kern_maxfiles__increase); 210 211 return (atf_no_error()); 212 } 213