1 /* $NetBSD: msdos.c,v 1.20 2017/04/14 15:40:35 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 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 #if HAVE_NBTOOL_CONFIG_H 32 #include "nbtool_config.h" 33 #endif 34 35 #include <sys/cdefs.h> 36 #include <sys/param.h> 37 38 #if !HAVE_NBTOOL_CONFIG_H 39 #include <sys/mount.h> 40 #endif 41 42 #include <assert.h> 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <stdarg.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <stdint.h> 50 #include <unistd.h> 51 #include <dirent.h> 52 #include <util.h> 53 54 #include <mkfs_msdos.h> 55 #include <fs/msdosfs/bpb.h> 56 #include "msdos/direntry.h" 57 #include "msdos/denode.h" 58 #include <fs/msdosfs/msdosfsmount.h> 59 60 #undef clrbuf 61 #include "ffs/buf.h" 62 #include "makefs.h" 63 #include "msdos.h" 64 65 static int msdos_populate_dir(const char *, struct denode *, fsnode *, 66 fsnode *, fsinfo_t *); 67 68 struct msdos_options_ex { 69 struct msdos_options options; 70 }; 71 72 void 73 msdos_prep_opts(fsinfo_t *fsopts) 74 { 75 struct msdos_options_ex *msdos_opt = ecalloc(1, sizeof(*msdos_opt)); 76 const option_t msdos_options[] = { 77 #define AOPT(_opt, _type, _name, _min, _desc) { \ 78 .letter = _opt, \ 79 .name = # _name, \ 80 .type = _min == -1 ? OPT_STRPTR : \ 81 (_min == -2 ? OPT_BOOL : \ 82 (sizeof(_type) == 1 ? OPT_INT8 : \ 83 (sizeof(_type) == 2 ? OPT_INT16 : \ 84 (sizeof(_type) == 4 ? OPT_INT32 : OPT_INT64)))), \ 85 .value = &msdos_opt->options._name, \ 86 .minimum = _min, \ 87 .maximum = sizeof(_type) == 1 ? UINT8_MAX : \ 88 (sizeof(_type) == 2 ? UINT16_MAX : \ 89 (sizeof(_type) == 4 ? UINT32_MAX : INT64_MAX)), \ 90 .desc = _desc, \ 91 }, 92 ALLOPTS 93 #undef AOPT 94 { .name = NULL } 95 }; 96 97 fsopts->fs_specific = msdos_opt; 98 fsopts->fs_options = copy_opts(msdos_options); 99 } 100 101 void 102 msdos_cleanup_opts(fsinfo_t *fsopts) 103 { 104 free(fsopts->fs_specific); 105 free(fsopts->fs_options); 106 } 107 108 int 109 msdos_parse_opts(const char *option, fsinfo_t *fsopts) 110 { 111 struct msdos_options *msdos_opt = fsopts->fs_specific; 112 option_t *msdos_options = fsopts->fs_options; 113 int rv; 114 115 assert(option != NULL); 116 assert(fsopts != NULL); 117 assert(msdos_opt != NULL); 118 119 if (debug & DEBUG_FS_PARSE_OPTS) 120 printf("msdos_parse_opts: got `%s'\n", option); 121 122 rv = set_option(msdos_options, option, NULL, 0); 123 if (rv == -1) 124 return rv; 125 126 if (strcmp(msdos_options[rv].name, "volume_id") == 0) 127 msdos_opt->volume_id_set = 1; 128 else if (strcmp(msdos_options[rv].name, "media_descriptor") == 0) 129 msdos_opt->media_descriptor_set = 1; 130 else if (strcmp(msdos_options[rv].name, "hidden_sectors") == 0) 131 msdos_opt->hidden_sectors_set = 1; 132 133 if (stampst.st_ino) { 134 msdos_opt->timestamp_set = 1; 135 msdos_opt->timestamp = stampst.st_mtime; 136 } 137 138 return 1; 139 } 140 141 142 void 143 msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts) 144 { 145 struct msdos_options_ex *msdos_opt = fsopts->fs_specific; 146 struct m_vnode vp, rootvp; 147 struct timeval start; 148 struct msdosfsmount *pmp; 149 150 assert(image != NULL); 151 assert(dir != NULL); 152 assert(root != NULL); 153 assert(fsopts != NULL); 154 155 fsopts->size = fsopts->maxsize; 156 msdos_opt->options.create_size = MAX(msdos_opt->options.create_size, 157 fsopts->offset + fsopts->size); 158 if (fsopts->offset > 0) 159 msdos_opt->options.offset = fsopts->offset; 160 if (msdos_opt->options.bytes_per_sector == 0) { 161 if (fsopts->sectorsize == -1) 162 fsopts->sectorsize = 512; 163 msdos_opt->options.bytes_per_sector = fsopts->sectorsize; 164 } else if (fsopts->sectorsize == -1) { 165 fsopts->sectorsize = msdos_opt->options.bytes_per_sector; 166 } else if (fsopts->sectorsize != msdos_opt->options.bytes_per_sector) { 167 err(1, "inconsistent sectorsize -S %u" 168 "!= -o bytes_per_sector %u", 169 fsopts->sectorsize, msdos_opt->options.bytes_per_sector); 170 } 171 172 /* create image */ 173 printf("Creating `%s'\n", image); 174 TIMER_START(start); 175 if (mkfs_msdos(image, NULL, &msdos_opt->options) == -1) 176 return; 177 TIMER_RESULTS(start, "mkfs_msdos"); 178 179 fsopts->fd = open(image, O_RDWR); 180 vp.fs = fsopts; 181 182 if ((pmp = m_msdosfs_mount(&vp)) == NULL) 183 err(1, "msdosfs_mount"); 184 185 if (msdosfs_root(pmp, &rootvp) != 0) 186 err(1, "msdosfs_root"); 187 188 if (debug & DEBUG_FS_MAKEFS) 189 printf("msdos_makefs: image %s directory %s root %p\n", 190 image, dir, root); 191 192 /* populate image */ 193 printf("Populating `%s'\n", image); 194 TIMER_START(start); 195 if (msdos_populate_dir(dir, VTODE(&rootvp), root, root, fsopts) == -1) 196 errx(1, "Image file `%s' not created.", image); 197 TIMER_RESULTS(start, "msdos_populate_dir"); 198 199 if (msdosfs_fsiflush(pmp) != 0) 200 errx(1, "Unable to update FSInfo block."); 201 if (debug & DEBUG_FS_MAKEFS) 202 putchar('\n'); 203 204 /* ensure no outstanding buffers remain */ 205 if (debug & DEBUG_FS_MAKEFS) 206 bcleanup(); 207 208 printf("Image `%s' complete\n", image); 209 } 210 211 static int 212 msdos_populate_dir(const char *path, struct denode *dir, fsnode *root, 213 fsnode *parent, fsinfo_t *fsopts) 214 { 215 fsnode *cur; 216 char pbuf[MAXPATHLEN]; 217 218 assert(dir != NULL); 219 assert(root != NULL); 220 assert(fsopts != NULL); 221 222 for (cur = root->next; cur != NULL; cur = cur->next) { 223 if ((size_t)snprintf(pbuf, sizeof(pbuf), "%s/%s", path, 224 cur->name) >= sizeof(pbuf)) { 225 warnx("path %s too long", pbuf); 226 return -1; 227 } 228 229 if ((cur->inode->flags & FI_ALLOCATED) == 0) { 230 cur->inode->flags |= FI_ALLOCATED; 231 if (cur != root) { 232 fsopts->curinode++; 233 cur->inode->ino = fsopts->curinode; 234 cur->parent = parent; 235 } 236 } 237 238 if (cur->inode->flags & FI_WRITTEN) { 239 continue; // hard link 240 } 241 cur->inode->flags |= FI_WRITTEN; 242 243 if (cur->child) { 244 struct denode *de; 245 if ((de = msdosfs_mkdire(pbuf, dir, cur)) == NULL) { 246 warn("msdosfs_mkdire %s", pbuf); 247 return -1; 248 } 249 if (msdos_populate_dir(pbuf, de, cur->child, cur, 250 fsopts) == -1) { 251 warn("msdos_populate_dir %s", pbuf); 252 return -1; 253 } 254 continue; 255 } else if (!S_ISREG(cur->type)) { 256 warnx("skipping non-regular file %s/%s", cur->path, 257 cur->name); 258 continue; 259 } 260 if (msdosfs_mkfile(cur->contents ? cur->contents : pbuf, dir, 261 cur) == NULL) { 262 warn("msdosfs_mkfile %s", pbuf); 263 return -1; 264 } 265 } 266 return 0; 267 } 268