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 #if defined(__RCSID) && !defined(__lint) 37 __FBSDID("$FreeBSD$"); 38 #endif /* !__lint */ 39 40 #include <sys/param.h> 41 42 #if !HAVE_NBTOOL_CONFIG_H 43 #include <sys/mount.h> 44 #endif 45 46 #include <assert.h> 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <stdarg.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <stdint.h> 54 #include <unistd.h> 55 #include <dirent.h> 56 #include <util.h> 57 58 #include "ffs/buf.h" 59 #include "makefs.h" 60 #include "msdos.h" 61 62 #include <mkfs_msdos.h> 63 #include <fs/msdosfs/bpb.h> 64 #include "msdos/direntry.h" 65 #include <fs/msdosfs/denode.h> 66 #include <fs/msdosfs/msdosfsmount.h> 67 68 static int msdos_populate_dir(const char *, struct denode *, fsnode *, 69 fsnode *, fsinfo_t *); 70 71 struct msdos_options_ex { 72 struct msdos_options options; 73 }; 74 75 void 76 msdos_prep_opts(fsinfo_t *fsopts) 77 { 78 struct msdos_options_ex *msdos_opt = ecalloc(1, sizeof(*msdos_opt)); 79 const option_t msdos_options[] = { 80 #define AOPT(_opt, _type, _name, _min, _desc) { \ 81 .letter = _opt, \ 82 .name = # _name, \ 83 .type = _min == -1 ? OPT_STRPTR : \ 84 (_min == -2 ? OPT_BOOL : \ 85 (sizeof(_type) == 1 ? OPT_INT8 : \ 86 (sizeof(_type) == 2 ? OPT_INT16 : \ 87 (sizeof(_type) == 4 ? OPT_INT32 : OPT_INT64)))), \ 88 .value = &msdos_opt->options._name, \ 89 .minimum = _min, \ 90 .maximum = sizeof(_type) == 1 ? UINT8_MAX : \ 91 (sizeof(_type) == 2 ? UINT16_MAX : \ 92 (sizeof(_type) == 4 ? UINT32_MAX : INT64_MAX)), \ 93 .desc = _desc, \ 94 }, 95 ALLOPTS 96 #undef AOPT 97 { .name = NULL } 98 }; 99 100 fsopts->fs_specific = msdos_opt; 101 fsopts->fs_options = copy_opts(msdos_options); 102 } 103 104 void 105 msdos_cleanup_opts(fsinfo_t *fsopts) 106 { 107 free(fsopts->fs_specific); 108 free(fsopts->fs_options); 109 } 110 111 int 112 msdos_parse_opts(const char *option, fsinfo_t *fsopts) 113 { 114 struct msdos_options *msdos_opt = fsopts->fs_specific; 115 option_t *msdos_options = fsopts->fs_options; 116 int rv; 117 118 assert(option != NULL); 119 assert(fsopts != NULL); 120 assert(msdos_opt != NULL); 121 122 if (debug & DEBUG_FS_PARSE_OPTS) 123 printf("msdos_parse_opts: got `%s'\n", option); 124 125 rv = set_option(msdos_options, option, NULL, 0); 126 if (rv == -1) 127 return rv; 128 129 if (strcmp(msdos_options[rv].name, "volume_id") == 0) 130 msdos_opt->volume_id_set = 1; 131 else if (strcmp(msdos_options[rv].name, "media_descriptor") == 0) 132 msdos_opt->media_descriptor_set = 1; 133 else if (strcmp(msdos_options[rv].name, "hidden_sectors") == 0) 134 msdos_opt->hidden_sectors_set = 1; 135 136 if (stampst.st_ino) { 137 msdos_opt->timestamp_set = 1; 138 msdos_opt->timestamp = stampst.st_mtime; 139 } 140 141 return 1; 142 } 143 144 145 void 146 msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts) 147 { 148 struct msdos_options_ex *msdos_opt = fsopts->fs_specific; 149 struct vnode vp, rootvp; 150 struct timeval start; 151 struct msdosfsmount *pmp; 152 uint32_t flags; 153 154 assert(image != NULL); 155 assert(dir != NULL); 156 assert(root != NULL); 157 assert(fsopts != NULL); 158 159 fsopts->size = fsopts->maxsize; 160 msdos_opt->options.create_size = MAX(msdos_opt->options.create_size, 161 fsopts->offset + fsopts->size); 162 if (fsopts->offset > 0) 163 msdos_opt->options.offset = fsopts->offset; 164 if (msdos_opt->options.bytes_per_sector == 0) { 165 if (fsopts->sectorsize == -1) 166 fsopts->sectorsize = 512; 167 msdos_opt->options.bytes_per_sector = fsopts->sectorsize; 168 } else if (fsopts->sectorsize == -1) { 169 fsopts->sectorsize = msdos_opt->options.bytes_per_sector; 170 } else if (fsopts->sectorsize != msdos_opt->options.bytes_per_sector) { 171 err(1, "inconsistent sectorsize -S %u" 172 "!= -o bytes_per_sector %u", 173 fsopts->sectorsize, msdos_opt->options.bytes_per_sector); 174 } 175 176 /* create image */ 177 printf("Creating `%s'\n", image); 178 TIMER_START(start); 179 if (mkfs_msdos(image, NULL, &msdos_opt->options) == -1) 180 return; 181 TIMER_RESULTS(start, "mkfs_msdos"); 182 183 fsopts->fd = open(image, O_RDWR); 184 vp.fs = fsopts; 185 186 flags = 0; 187 if ((pmp = msdosfs_mount(&vp)) == NULL) 188 err(1, "msdosfs_mount"); 189 190 if (msdosfs_root(pmp, &rootvp) != 0) 191 err(1, "msdosfs_root"); 192 193 if (debug & DEBUG_FS_MAKEFS) 194 printf("msdos_makefs: image %s directory %s root %p\n", 195 image, dir, root); 196 197 /* populate image */ 198 printf("Populating `%s'\n", image); 199 TIMER_START(start); 200 if (msdos_populate_dir(dir, VTODE(&rootvp), root, root, fsopts) == -1) 201 errx(1, "Image file `%s' not created.", image); 202 TIMER_RESULTS(start, "msdos_populate_dir"); 203 204 if (msdosfs_fsiflush(pmp) != 0) 205 errx(1, "Unable to update FSInfo block."); 206 if (debug & DEBUG_FS_MAKEFS) 207 putchar('\n'); 208 209 /* ensure no outstanding buffers remain */ 210 if (debug & DEBUG_FS_MAKEFS) 211 bcleanup(); 212 213 printf("Image `%s' complete\n", image); 214 } 215 216 static int 217 msdos_populate_dir(const char *path, struct denode *dir, fsnode *root, 218 fsnode *parent, fsinfo_t *fsopts) 219 { 220 fsnode *cur; 221 char pbuf[MAXPATHLEN]; 222 223 assert(dir != NULL); 224 assert(root != NULL); 225 assert(fsopts != NULL); 226 227 for (cur = root->next; cur != NULL; cur = cur->next) { 228 if ((size_t)snprintf(pbuf, sizeof(pbuf), "%s/%s", path, 229 cur->name) >= sizeof(pbuf)) { 230 warnx("path %s too long", pbuf); 231 return -1; 232 } 233 234 if ((cur->inode->flags & FI_ALLOCATED) == 0) { 235 cur->inode->flags |= FI_ALLOCATED; 236 if (cur != root) { 237 fsopts->curinode++; 238 cur->inode->ino = fsopts->curinode; 239 cur->parent = parent; 240 } 241 } 242 243 if (cur->inode->flags & FI_WRITTEN) { 244 continue; // hard link 245 } 246 cur->inode->flags |= FI_WRITTEN; 247 248 if (cur->child) { 249 struct denode *de; 250 if ((de = msdosfs_mkdire(pbuf, dir, cur)) == NULL) { 251 warn("msdosfs_mkdire %s", pbuf); 252 return -1; 253 } 254 if (msdos_populate_dir(pbuf, de, cur->child, cur, 255 fsopts) == -1) { 256 warn("msdos_populate_dir %s", pbuf); 257 return -1; 258 } 259 continue; 260 } else if (!S_ISREG(cur->type)) { 261 warnx("skipping non-regular file %s/%s", cur->path, 262 cur->name); 263 continue; 264 } 265 if (msdosfs_mkfile(cur->contents ? cur->contents : pbuf, dir, 266 cur) == NULL) { 267 warn("msdosfs_mkfile %s", pbuf); 268 return -1; 269 } 270 } 271 return 0; 272 } 273