1 /* $NetBSD: t_msync.c,v 1.3 2017/01/14 20:52:42 christos 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 1.3 2017/01/14 20:52:42 christos 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 *
msync_sync(const char * garbage,int flags)51 msync_sync(const char *garbage, int flags)
52 {
53 char *buf, *map = MAP_FAILED;
54 const char *str = NULL;
55 size_t len;
56 int fd, rv;
57
58 /*
59 * Create a temporary file, write
60 * one page to it, and map the file.
61 */
62 buf = malloc(page);
63
64 if (buf == NULL)
65 return NULL;
66
67 memset(buf, 'x', page);
68
69 fd = open(path, O_RDWR | O_CREAT, 0700);
70
71 if (fd < 0) {
72 free(buf);
73 return "failed to open";
74 }
75
76 ATF_REQUIRE_MSG(write(fd, buf, page) != -1, "write(2) failed: %s",
77 strerror(errno));
78
79 map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_FILE|MAP_PRIVATE,
80 fd, 0);
81
82 if (map == MAP_FAILED) {
83 str = "failed to map";
84 goto out;
85 }
86
87 /*
88 * Seek to an arbitrary offset and
89 * write garbage to this position.
90 */
91 if (lseek(fd, off, SEEK_SET) != off) {
92 str = "failed to seek";
93 goto out;
94 }
95
96 len = strlen(garbage);
97 rv = write(fd, garbage, len);
98
99 if (rv != (ssize_t)len) {
100 str = "failed to write garbage";
101 goto out;
102 }
103
104 /*
105 * Synchronize the mapping and verify
106 * that garbage is at the given offset.
107 */
108 if (msync(map, page, flags) != 0) {
109 str = "failed to msync";
110 goto out;
111 }
112
113 if (memcmp(map + off, garbage, len) != 0) {
114 str = "msync did not synchronize";
115 goto out;
116 }
117
118 out:
119 free(buf);
120
121 (void)close(fd);
122 (void)unlink(path);
123
124 if (map != MAP_FAILED)
125 (void)munmap(map, page);
126
127 return str;
128 }
129
130 ATF_TC(msync_async);
ATF_TC_HEAD(msync_async,tc)131 ATF_TC_HEAD(msync_async, tc)
132 {
133 atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_ASYNC");
134 }
135
ATF_TC_BODY(msync_async,tc)136 ATF_TC_BODY(msync_async, tc)
137 {
138 const char *str;
139
140 str = msync_sync("garbage", MS_ASYNC);
141
142 if (str != NULL)
143 atf_tc_fail("%s", str);
144 }
145
146 ATF_TC(msync_err);
ATF_TC_HEAD(msync_err,tc)147 ATF_TC_HEAD(msync_err, tc)
148 {
149 atf_tc_set_md_var(tc, "descr", "Test error conditions in msync(2)");
150 }
151
ATF_TC_BODY(msync_err,tc)152 ATF_TC_BODY(msync_err, tc)
153 {
154
155 char *map = MAP_FAILED;
156
157 /*
158 * Test that invalid flags error out.
159 */
160 #ifdef __FreeBSD__
161 errno = 0;
162 ATF_REQUIRE_ERRNO(EINVAL, msync_sync("error", -1) != NULL);
163 errno = 0;
164 ATF_REQUIRE_ERRNO(EINVAL, msync_sync("error", INT_MAX) != NULL);
165 #else
166 ATF_REQUIRE(msync_sync("error", -1) != NULL);
167 ATF_REQUIRE(msync_sync("error", INT_MAX) != NULL);
168 #endif
169
170 errno = 0;
171
172 /*
173 * Map a page and then unmap to get an unmapped address.
174 */
175 map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
176 -1, 0);
177 ATF_REQUIRE(map != MAP_FAILED);
178
179 (void)munmap(map, page);
180
181 ATF_REQUIRE(msync(map, page, MS_SYNC) != 0);
182 #ifdef __FreeBSD__
183 ATF_REQUIRE(errno == ENOMEM);
184 #else
185 ATF_REQUIRE(errno == EFAULT);
186 #endif
187 }
188
189 ATF_TC(msync_invalidate);
ATF_TC_HEAD(msync_invalidate,tc)190 ATF_TC_HEAD(msync_invalidate, tc)
191 {
192 atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_INVALIDATE");
193 }
194
ATF_TC_BODY(msync_invalidate,tc)195 ATF_TC_BODY(msync_invalidate, tc)
196 {
197 const char *str;
198
199 str = msync_sync("garbage", MS_INVALIDATE);
200
201 if (str != NULL)
202 atf_tc_fail("%s", str);
203 }
204
205 ATF_TC(msync_sync);
ATF_TC_HEAD(msync_sync,tc)206 ATF_TC_HEAD(msync_sync, tc)
207 {
208 atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_SYNC");
209 }
210
ATF_TC_BODY(msync_sync,tc)211 ATF_TC_BODY(msync_sync, tc)
212 {
213 const char *str;
214
215 str = msync_sync("garbage", MS_SYNC);
216
217 if (str != NULL)
218 atf_tc_fail("%s", str);
219 }
220
ATF_TP_ADD_TCS(tp)221 ATF_TP_ADD_TCS(tp)
222 {
223
224 page = sysconf(_SC_PAGESIZE);
225
226 ATF_REQUIRE(page >= 0);
227 ATF_REQUIRE(page > off);
228
229 ATF_TP_ADD_TC(tp, msync_async);
230 ATF_TP_ADD_TC(tp, msync_err);
231 ATF_TP_ADD_TC(tp, msync_invalidate);
232 ATF_TP_ADD_TC(tp, msync_sync);
233
234 return atf_no_error();
235 }
236