1 /* $NetBSD: t_msync.c,v 1.2 2012/03/16 06:15:17 matt 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 Foundation 8 * by Jukka Ruohonen. 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_msync.c,v 1.2 2012/03/16 06:15:17 matt Exp $"); 33 34 #include <sys/mman.h> 35 36 #include <atf-c.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <limits.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 static long page = 0; 45 static const off_t off = 512; 46 static const char path[] = "msync"; 47 48 static const char *msync_sync(const char *, int); 49 50 static const char * 51 msync_sync(const char *garbage, int flags) 52 { 53 char *buf, *map = MAP_FAILED; 54 const char *str = NULL; 55 size_t i, len; 56 ssize_t tot; 57 int fd, rv; 58 59 /* 60 * Create a temporary file, write 61 * one page to it, and map the file. 62 */ 63 buf = malloc(page); 64 65 if (buf == NULL) 66 return NULL; 67 68 for (i = 0; i < (size_t)page; i++) 69 buf[i] = 'x'; 70 71 fd = open(path, O_RDWR | O_CREAT, 0700); 72 73 if (fd < 0) { 74 str = "failed to open"; 75 goto out; 76 } 77 78 tot = 0; 79 80 while (tot < page) { 81 82 rv = write(fd, buf, sizeof(buf)); 83 84 if (rv < 0) { 85 str = "failed to write"; 86 goto out; 87 } 88 89 tot += rv; 90 } 91 92 map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_FILE|MAP_PRIVATE, 93 fd, 0); 94 95 if (map == MAP_FAILED) { 96 str = "failed to map"; 97 goto out; 98 } 99 100 /* 101 * Seek to an arbitrary offset and 102 * write garbage to this position. 103 */ 104 if (lseek(fd, off, SEEK_SET) != off) { 105 str = "failed to seek"; 106 goto out; 107 } 108 109 len = strlen(garbage); 110 rv = write(fd, garbage, len); 111 112 if (rv != (ssize_t)len) { 113 str = "failed to write garbage"; 114 goto out; 115 } 116 117 /* 118 * Synchronize the mapping and verify 119 * that garbage is at the given offset. 120 */ 121 if (msync(map, page, flags) != 0) { 122 str = "failed to msync"; 123 goto out; 124 } 125 126 if (memcmp(map + off, garbage, len) != 0) { 127 str = "msync did not synchronize"; 128 goto out; 129 } 130 131 out: 132 free(buf); 133 134 (void)close(fd); 135 (void)unlink(path); 136 137 if (map != MAP_FAILED) 138 (void)munmap(map, page); 139 140 return str; 141 } 142 143 ATF_TC(msync_async); 144 ATF_TC_HEAD(msync_async, tc) 145 { 146 atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_ASYNC"); 147 } 148 149 ATF_TC_BODY(msync_async, tc) 150 { 151 const char *str; 152 153 str = msync_sync("garbage", MS_ASYNC); 154 155 if (str != NULL) 156 atf_tc_fail("%s", str); 157 } 158 159 ATF_TC(msync_err); 160 ATF_TC_HEAD(msync_err, tc) 161 { 162 atf_tc_set_md_var(tc, "descr", "Test error conditions in msync(2)"); 163 } 164 165 ATF_TC_BODY(msync_err, tc) 166 { 167 168 char *map = MAP_FAILED; 169 170 /* 171 * Test that invalid flags error out. 172 */ 173 #ifdef __FreeBSD__ 174 errno = 0; 175 ATF_REQUIRE_ERRNO(EINVAL, msync_sync("error", -1) != NULL); 176 errno = 0; 177 ATF_REQUIRE_ERRNO(EINVAL, msync_sync("error", INT_MAX) != NULL); 178 #else 179 ATF_REQUIRE(msync_sync("error", -1) != NULL); 180 ATF_REQUIRE(msync_sync("error", INT_MAX) != NULL); 181 #endif 182 183 errno = 0; 184 185 /* 186 * Map a page and then unmap to get an unmapped address. 187 */ 188 map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, 189 -1, 0); 190 ATF_REQUIRE(map != MAP_FAILED); 191 192 (void)munmap(map, page); 193 194 ATF_REQUIRE(msync(map, page, MS_SYNC) != 0); 195 #ifdef __FreeBSD__ 196 ATF_REQUIRE(errno == ENOMEM); 197 #else 198 ATF_REQUIRE(errno == EFAULT); 199 #endif 200 } 201 202 ATF_TC(msync_invalidate); 203 ATF_TC_HEAD(msync_invalidate, tc) 204 { 205 atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_INVALIDATE"); 206 } 207 208 ATF_TC_BODY(msync_invalidate, tc) 209 { 210 const char *str; 211 212 str = msync_sync("garbage", MS_INVALIDATE); 213 214 if (str != NULL) 215 atf_tc_fail("%s", str); 216 } 217 218 ATF_TC(msync_sync); 219 ATF_TC_HEAD(msync_sync, tc) 220 { 221 atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_SYNC"); 222 } 223 224 ATF_TC_BODY(msync_sync, tc) 225 { 226 const char *str; 227 228 str = msync_sync("garbage", MS_SYNC); 229 230 if (str != NULL) 231 atf_tc_fail("%s", str); 232 } 233 234 ATF_TP_ADD_TCS(tp) 235 { 236 237 page = sysconf(_SC_PAGESIZE); 238 239 ATF_REQUIRE(page >= 0); 240 ATF_REQUIRE(page > off); 241 242 ATF_TP_ADD_TC(tp, msync_async); 243 ATF_TP_ADD_TC(tp, msync_err); 244 ATF_TP_ADD_TC(tp, msync_invalidate); 245 ATF_TP_ADD_TC(tp, msync_sync); 246 247 return atf_no_error(); 248 } 249