1 /* $NetBSD: t_rwtoro.c,v 1.2 2020/05/14 08:34:18 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/types.h> 30 #include <sys/mount.h> 31 #include <sys/stat.h> 32 #include <sys/statvfs.h> 33 34 #include <atf-c.h> 35 #include <fcntl.h> 36 #include <libgen.h> 37 #include <stdlib.h> 38 #include <unistd.h> 39 40 #include <rump/rump_syscalls.h> 41 #include <rump/rump.h> 42 43 #include <miscfs/nullfs/null.h> 44 #include <fs/tmpfs/tmpfs_args.h> 45 46 #include "../common/h_fsmacros.h" 47 #include "../../h_macros.h" 48 49 static const char *unsupported = "fs does not support r/o remount"; 50 static char file_path[MAXPATHLEN]; 51 static int file_fd; 52 53 /* 54 * Remount the filesystem read-only and test errno. 55 * Skip filesystems that don't implement read-write -> read-only. 56 */ 57 static void 58 remount_ro(const atf_tc_t *tc, const char *mp, int expected_errno) 59 { 60 int error; 61 union { 62 struct tmpfs_args tmpfs; 63 char data[4095]; 64 } mount_args; 65 int mount_args_length; 66 struct statvfs sbuf; 67 68 if (FSTYPE_ZFS(tc)) 69 atf_tc_skip("%s", unsupported); 70 71 /* Prepare mount arguments. */ 72 RL(rump_sys_statvfs1(mp, &sbuf, ST_WAIT)); 73 mount_args_length = sizeof(mount_args); 74 memset(&mount_args, 0, mount_args_length); 75 if (FSTYPE_TMPFS(tc)) 76 mount_args.tmpfs.ta_version = TMPFS_ARGS_VERSION; 77 mount_args_length = rump_sys_mount(sbuf.f_fstypename, mp, MNT_GETARGS, 78 &mount_args, mount_args_length); 79 ATF_CHECK(mount_args_length >= 0); 80 81 /* Remount and test result. */ 82 error = rump_sys_mount(sbuf.f_fstypename, mp, MNT_UPDATE | MNT_RDONLY, 83 &mount_args, mount_args_length); 84 if (errno == EOPNOTSUPP) 85 atf_tc_skip("%s", unsupported); 86 if (expected_errno == 0) 87 ATF_CHECK(error == 0); 88 else 89 ATF_CHECK_ERRNO(expected_errno, error == -1); 90 } 91 92 static void 93 open_file_ro(const char *prefix) 94 { 95 96 snprintf(file_path, sizeof(file_path), "%s/file", prefix); 97 RL(file_fd = rump_sys_open(file_path, O_CREAT | O_RDWR, 0777)); 98 RL(rump_sys_close(file_fd)); 99 RL(file_fd = rump_sys_open(file_path, O_RDONLY)); 100 } 101 102 static void 103 open_file_ro_unlink(const char *prefix) 104 { 105 106 snprintf(file_path, sizeof(file_path), "%s/file", prefix); 107 RL(file_fd = rump_sys_open(file_path, O_CREAT | O_RDWR, 0777)); 108 RL(rump_sys_close(file_fd)); 109 RL(file_fd = rump_sys_open(file_path, O_RDONLY)); 110 RL(rump_sys_unlink(file_path)); 111 } 112 113 static void 114 open_file_rw(const char *prefix) 115 { 116 117 snprintf(file_path, sizeof(file_path), "%s/file", prefix); 118 RL(file_fd = rump_sys_open(file_path, O_CREAT | O_RDWR, 0777)); 119 } 120 121 static void 122 close_file(const char *unused) 123 { 124 125 RL(rump_sys_close(file_fd)); 126 } 127 128 static void 129 basic_test(const atf_tc_t *tc, const char *mp, int expected_errno, 130 bool use_layer, void (*pre)(const char *), void (*post)(const char *)) 131 { 132 const char *null_mount = "/nullm"; 133 struct null_args nargs; 134 135 if (use_layer) { 136 RL(rump_sys_mkdir(null_mount, 0777)); 137 memset(&nargs, 0, sizeof(nargs)); 138 nargs.nulla_target = __UNCONST(mp); 139 RL(rump_sys_mount(MOUNT_NULL, null_mount, 0, 140 &nargs, sizeof(nargs))); 141 } 142 if (pre) 143 (*pre)(use_layer ? null_mount : mp); 144 remount_ro(tc, mp, expected_errno); 145 if (post) 146 (*post)(use_layer ? null_mount : mp); 147 if (use_layer) 148 RL(rump_sys_unmount(null_mount, 0)); 149 } 150 151 static void 152 noneopen(const atf_tc_t *tc, const char *mp) 153 { 154 155 basic_test(tc, mp, 0, false, NULL, NULL); 156 } 157 158 static void 159 readopen(const atf_tc_t *tc, const char *mp) 160 { 161 162 basic_test(tc, mp, 0, false, open_file_ro, close_file); 163 } 164 165 static void 166 writeopen(const atf_tc_t *tc, const char *mp) 167 { 168 169 basic_test(tc, mp, EBUSY, false, open_file_rw, close_file); 170 } 171 172 static void 173 read_unlinked(const atf_tc_t *tc, const char *mp) 174 { 175 176 basic_test(tc, mp, EBUSY, false, open_file_ro_unlink, close_file); 177 } 178 179 static void 180 layer_noneopen(const atf_tc_t *tc, const char *mp) 181 { 182 183 basic_test(tc, mp, 0, true, NULL, NULL); 184 } 185 186 static void 187 layer_readopen(const atf_tc_t *tc, const char *mp) 188 { 189 190 basic_test(tc, mp, 0, true, open_file_ro, close_file); 191 } 192 193 static void 194 layer_writeopen(const atf_tc_t *tc, const char *mp) 195 { 196 197 basic_test(tc, mp, EBUSY, true, open_file_rw, close_file); 198 } 199 200 static void 201 layer_read_unlinked(const atf_tc_t *tc, const char *mp) 202 { 203 204 basic_test(tc, mp, EBUSY, true, open_file_ro_unlink, close_file); 205 } 206 207 ATF_TC_FSAPPLY(noneopen, "remount r/o with no file open"); 208 ATF_TC_FSAPPLY(readopen, "remount r/o with file open for reading"); 209 ATF_TC_FSAPPLY(writeopen, "remount r/o with file open for writing"); 210 ATF_TC_FSAPPLY(read_unlinked, 211 "remount r/o with unlinked file open for reading"); 212 ATF_TC_FSAPPLY(layer_noneopen, "remount r/o with no file open on layer"); 213 ATF_TC_FSAPPLY(layer_readopen, 214 "remount r/o with file open for reading on layer"); 215 ATF_TC_FSAPPLY(layer_writeopen, 216 "remount r/o with file open for writing on layer"); 217 ATF_TC_FSAPPLY(layer_read_unlinked, 218 "remount r/o with unlinked file open for reading on layer"); 219 220 ATF_TP_ADD_TCS(tp) 221 { 222 223 ATF_TP_FSAPPLY(noneopen); 224 ATF_TP_FSAPPLY(readopen); 225 ATF_TP_FSAPPLY(writeopen); 226 ATF_TP_FSAPPLY(read_unlinked); 227 ATF_TP_FSAPPLY(layer_noneopen); 228 ATF_TP_FSAPPLY(layer_readopen); 229 ATF_TP_FSAPPLY(layer_writeopen); 230 ATF_TP_FSAPPLY(layer_read_unlinked); 231 232 return atf_no_error(); 233 } 234
Indexes created Mon Sep 22 21:09:42 GMT 2025