157718be8SEnji Cooper /* $NetBSD: t_msync.c,v 1.2 2012/03/16 06:15:17 matt Exp $ */ 257718be8SEnji Cooper 357718be8SEnji Cooper /*- 457718be8SEnji Cooper * Copyright (c) 2011 The NetBSD Foundation, Inc. 557718be8SEnji Cooper * All rights reserved. 657718be8SEnji Cooper * 757718be8SEnji Cooper * This code is derived from software contributed to The NetBSD Foundation 857718be8SEnji Cooper * by Jukka Ruohonen. 957718be8SEnji Cooper * 1057718be8SEnji Cooper * Redistribution and use in source and binary forms, with or without 1157718be8SEnji Cooper * modification, are permitted provided that the following conditions 1257718be8SEnji Cooper * are met: 1357718be8SEnji Cooper * 1. Redistributions of source code must retain the above copyright 1457718be8SEnji Cooper * notice, this list of conditions and the following disclaimer. 1557718be8SEnji Cooper * 2. Redistributions in binary form must reproduce the above copyright 1657718be8SEnji Cooper * notice, this list of conditions and the following disclaimer in the 1757718be8SEnji Cooper * documentation and/or other materials provided with the distribution. 1857718be8SEnji Cooper * 1957718be8SEnji Cooper * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 2057718be8SEnji Cooper * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2157718be8SEnji Cooper * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2257718be8SEnji Cooper * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 2357718be8SEnji Cooper * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2457718be8SEnji Cooper * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2557718be8SEnji Cooper * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2657718be8SEnji Cooper * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 2757718be8SEnji Cooper * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 2857718be8SEnji Cooper * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 2957718be8SEnji Cooper * POSSIBILITY OF SUCH DAMAGE. 3057718be8SEnji Cooper */ 3157718be8SEnji Cooper #include <sys/cdefs.h> 3257718be8SEnji Cooper __RCSID("$NetBSD: t_msync.c,v 1.2 2012/03/16 06:15:17 matt Exp $"); 3357718be8SEnji Cooper 3457718be8SEnji Cooper #include <sys/mman.h> 3557718be8SEnji Cooper 3657718be8SEnji Cooper #include <atf-c.h> 3757718be8SEnji Cooper #include <errno.h> 3857718be8SEnji Cooper #include <fcntl.h> 3957718be8SEnji Cooper #include <limits.h> 4057718be8SEnji Cooper #include <stdlib.h> 4157718be8SEnji Cooper #include <string.h> 4257718be8SEnji Cooper #include <unistd.h> 4357718be8SEnji Cooper 4457718be8SEnji Cooper static long page = 0; 4557718be8SEnji Cooper static const off_t off = 512; 4657718be8SEnji Cooper static const char path[] = "msync"; 4757718be8SEnji Cooper 4857718be8SEnji Cooper static const char *msync_sync(const char *, int); 4957718be8SEnji Cooper 5057718be8SEnji Cooper static const char * 5157718be8SEnji Cooper msync_sync(const char *garbage, int flags) 5257718be8SEnji Cooper { 5357718be8SEnji Cooper char *buf, *map = MAP_FAILED; 5457718be8SEnji Cooper const char *str = NULL; 5557718be8SEnji Cooper size_t i, len; 5657718be8SEnji Cooper ssize_t tot; 5757718be8SEnji Cooper int fd, rv; 5857718be8SEnji Cooper 5957718be8SEnji Cooper /* 6057718be8SEnji Cooper * Create a temporary file, write 6157718be8SEnji Cooper * one page to it, and map the file. 6257718be8SEnji Cooper */ 6357718be8SEnji Cooper buf = malloc(page); 6457718be8SEnji Cooper 6557718be8SEnji Cooper if (buf == NULL) 6657718be8SEnji Cooper return NULL; 6757718be8SEnji Cooper 6857718be8SEnji Cooper for (i = 0; i < (size_t)page; i++) 6957718be8SEnji Cooper buf[i] = 'x'; 7057718be8SEnji Cooper 7157718be8SEnji Cooper fd = open(path, O_RDWR | O_CREAT, 0700); 7257718be8SEnji Cooper 7357718be8SEnji Cooper if (fd < 0) { 7457718be8SEnji Cooper str = "failed to open"; 7557718be8SEnji Cooper goto out; 7657718be8SEnji Cooper } 7757718be8SEnji Cooper 7857718be8SEnji Cooper tot = 0; 7957718be8SEnji Cooper 8057718be8SEnji Cooper while (tot < page) { 8157718be8SEnji Cooper 8257718be8SEnji Cooper rv = write(fd, buf, sizeof(buf)); 8357718be8SEnji Cooper 8457718be8SEnji Cooper if (rv < 0) { 8557718be8SEnji Cooper str = "failed to write"; 8657718be8SEnji Cooper goto out; 8757718be8SEnji Cooper } 8857718be8SEnji Cooper 8957718be8SEnji Cooper tot += rv; 9057718be8SEnji Cooper } 9157718be8SEnji Cooper 9257718be8SEnji Cooper map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_FILE|MAP_PRIVATE, 9357718be8SEnji Cooper fd, 0); 9457718be8SEnji Cooper 9557718be8SEnji Cooper if (map == MAP_FAILED) { 9657718be8SEnji Cooper str = "failed to map"; 9757718be8SEnji Cooper goto out; 9857718be8SEnji Cooper } 9957718be8SEnji Cooper 10057718be8SEnji Cooper /* 10157718be8SEnji Cooper * Seek to an arbitrary offset and 10257718be8SEnji Cooper * write garbage to this position. 10357718be8SEnji Cooper */ 10457718be8SEnji Cooper if (lseek(fd, off, SEEK_SET) != off) { 10557718be8SEnji Cooper str = "failed to seek"; 10657718be8SEnji Cooper goto out; 10757718be8SEnji Cooper } 10857718be8SEnji Cooper 10957718be8SEnji Cooper len = strlen(garbage); 11057718be8SEnji Cooper rv = write(fd, garbage, len); 11157718be8SEnji Cooper 11257718be8SEnji Cooper if (rv != (ssize_t)len) { 11357718be8SEnji Cooper str = "failed to write garbage"; 11457718be8SEnji Cooper goto out; 11557718be8SEnji Cooper } 11657718be8SEnji Cooper 11757718be8SEnji Cooper /* 11857718be8SEnji Cooper * Synchronize the mapping and verify 11957718be8SEnji Cooper * that garbage is at the given offset. 12057718be8SEnji Cooper */ 12157718be8SEnji Cooper if (msync(map, page, flags) != 0) { 12257718be8SEnji Cooper str = "failed to msync"; 12357718be8SEnji Cooper goto out; 12457718be8SEnji Cooper } 12557718be8SEnji Cooper 12657718be8SEnji Cooper if (memcmp(map + off, garbage, len) != 0) { 12757718be8SEnji Cooper str = "msync did not synchronize"; 12857718be8SEnji Cooper goto out; 12957718be8SEnji Cooper } 13057718be8SEnji Cooper 13157718be8SEnji Cooper out: 13257718be8SEnji Cooper free(buf); 13357718be8SEnji Cooper 13457718be8SEnji Cooper (void)close(fd); 13557718be8SEnji Cooper (void)unlink(path); 13657718be8SEnji Cooper 13757718be8SEnji Cooper if (map != MAP_FAILED) 13857718be8SEnji Cooper (void)munmap(map, page); 13957718be8SEnji Cooper 14057718be8SEnji Cooper return str; 14157718be8SEnji Cooper } 14257718be8SEnji Cooper 14357718be8SEnji Cooper ATF_TC(msync_async); 14457718be8SEnji Cooper ATF_TC_HEAD(msync_async, tc) 14557718be8SEnji Cooper { 14657718be8SEnji Cooper atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_ASYNC"); 14757718be8SEnji Cooper } 14857718be8SEnji Cooper 14957718be8SEnji Cooper ATF_TC_BODY(msync_async, tc) 15057718be8SEnji Cooper { 15157718be8SEnji Cooper const char *str; 15257718be8SEnji Cooper 15357718be8SEnji Cooper str = msync_sync("garbage", MS_ASYNC); 15457718be8SEnji Cooper 15557718be8SEnji Cooper if (str != NULL) 15657718be8SEnji Cooper atf_tc_fail("%s", str); 15757718be8SEnji Cooper } 15857718be8SEnji Cooper 15957718be8SEnji Cooper ATF_TC(msync_err); 16057718be8SEnji Cooper ATF_TC_HEAD(msync_err, tc) 16157718be8SEnji Cooper { 16257718be8SEnji Cooper atf_tc_set_md_var(tc, "descr", "Test error conditions in msync(2)"); 16357718be8SEnji Cooper } 16457718be8SEnji Cooper 16557718be8SEnji Cooper ATF_TC_BODY(msync_err, tc) 16657718be8SEnji Cooper { 16757718be8SEnji Cooper 16857718be8SEnji Cooper char *map = MAP_FAILED; 16957718be8SEnji Cooper 17057718be8SEnji Cooper /* 17157718be8SEnji Cooper * Test that invalid flags error out. 17257718be8SEnji Cooper */ 17357718be8SEnji Cooper ATF_REQUIRE(msync_sync("error", -1) != NULL); 17457718be8SEnji Cooper ATF_REQUIRE(msync_sync("error", INT_MAX) != NULL); 17557718be8SEnji Cooper 17657718be8SEnji Cooper errno = 0; 17757718be8SEnji Cooper 17857718be8SEnji Cooper /* 17957718be8SEnji Cooper * Map a page and then unmap to get an unmapped address. 18057718be8SEnji Cooper */ 18157718be8SEnji Cooper map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, 18257718be8SEnji Cooper -1, 0); 18357718be8SEnji Cooper ATF_REQUIRE(map != MAP_FAILED); 18457718be8SEnji Cooper 18557718be8SEnji Cooper (void)munmap(map, page); 18657718be8SEnji Cooper 18757718be8SEnji Cooper ATF_REQUIRE(msync(map, page, MS_SYNC) != 0); 18857718be8SEnji Cooper ATF_REQUIRE(errno == EFAULT); 18957718be8SEnji Cooper } 19057718be8SEnji Cooper 19157718be8SEnji Cooper ATF_TC(msync_invalidate); 19257718be8SEnji Cooper ATF_TC_HEAD(msync_invalidate, tc) 19357718be8SEnji Cooper { 19457718be8SEnji Cooper atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_INVALIDATE"); 19557718be8SEnji Cooper } 19657718be8SEnji Cooper 19757718be8SEnji Cooper ATF_TC_BODY(msync_invalidate, tc) 19857718be8SEnji Cooper { 19957718be8SEnji Cooper const char *str; 20057718be8SEnji Cooper 20157718be8SEnji Cooper str = msync_sync("garbage", MS_INVALIDATE); 20257718be8SEnji Cooper 20357718be8SEnji Cooper if (str != NULL) 20457718be8SEnji Cooper atf_tc_fail("%s", str); 20557718be8SEnji Cooper } 20657718be8SEnji Cooper 20757718be8SEnji Cooper ATF_TC(msync_sync); 20857718be8SEnji Cooper ATF_TC_HEAD(msync_sync, tc) 20957718be8SEnji Cooper { 21057718be8SEnji Cooper atf_tc_set_md_var(tc, "descr", "Test of msync(2), MS_SYNC"); 21157718be8SEnji Cooper } 21257718be8SEnji Cooper 21357718be8SEnji Cooper ATF_TC_BODY(msync_sync, tc) 21457718be8SEnji Cooper { 21557718be8SEnji Cooper const char *str; 21657718be8SEnji Cooper 21757718be8SEnji Cooper str = msync_sync("garbage", MS_SYNC); 21857718be8SEnji Cooper 21957718be8SEnji Cooper if (str != NULL) 22057718be8SEnji Cooper atf_tc_fail("%s", str); 22157718be8SEnji Cooper } 22257718be8SEnji Cooper 22357718be8SEnji Cooper ATF_TP_ADD_TCS(tp) 22457718be8SEnji Cooper { 22557718be8SEnji Cooper 22657718be8SEnji Cooper page = sysconf(_SC_PAGESIZE); 22757718be8SEnji Cooper 22857718be8SEnji Cooper ATF_REQUIRE(page >= 0); 22957718be8SEnji Cooper ATF_REQUIRE(page > off); 23057718be8SEnji Cooper 23157718be8SEnji Cooper ATF_TP_ADD_TC(tp, msync_async); 23257718be8SEnji Cooper ATF_TP_ADD_TC(tp, msync_err); 23357718be8SEnji Cooper ATF_TP_ADD_TC(tp, msync_invalidate); 23457718be8SEnji Cooper ATF_TP_ADD_TC(tp, msync_sync); 23557718be8SEnji Cooper 23657718be8SEnji Cooper return atf_no_error(); 23757718be8SEnji Cooper } 238