usr.sbin/makefs/msdos.c

   1 /*      $NetBSD: msdos.c,v 1.14 2013/02/03 03:21:21 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  * 3. Neither the name of The NetBSD Foundation nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  */
  34 #if HAVE_NBTOOL_CONFIG_H
  35 #include "nbtool_config.h"
  36 #endif
  37
  38 #include <sys/cdefs.h>
  39 #if defined(__RCSID) && !defined(__lint)
  40 __RCSID("$NetBSD: msdos.c,v 1.14 2013/02/03 03:21:21 christos Exp $");
  41 #endif  /* !__lint */
  42
  43 #include <sys/param.h>
  44
  45 #if !HAVE_NBTOOL_CONFIG_H
  46 #include <sys/mount.h>
  47 #endif
  48
  49 #include <assert.h>
  50 #include <errno.h>
  51 #include <fcntl.h>
  52 #include <stdarg.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <unistd.h>
  57 #include <dirent.h>
  58 #include <util.h>
  59
  60 #include <ffs/buf.h>
  61 #include <fs/msdosfs/denode.h>
  62 #include "makefs.h"
  63 #include "msdos.h"
  64 #include "mkfs_msdos.h"
  65
  66 static int msdos_populate_dir(const char *, struct denode *, fsnode *,
  67     fsnode *, fsinfo_t *);
  68
  69 void
  70 msdos_prep_opts(fsinfo_t *fsopts)
  71 {
  72         struct msdos_options *msdos_opt = ecalloc(1, sizeof(*msdos_opt));
  73         const option_t msdos_options[] = {
  74 #define AOPT(_opt, _type, _name, _min, _desc) {                         \
  75         .letter = _opt,                                                 \
  76         .name = # _name,                                                \
  77         .type = _min == -1 ? OPT_STRPTR :                               \
  78             (_min == -2 ? OPT_BOOL :                                    \
  79             (sizeof(_type) == 1 ? OPT_INT8 :                            \
  80             (sizeof(_type) == 2 ? OPT_INT16 :                           \
  81             (sizeof(_type) == 4 ? OPT_INT32 : OPT_INT64)))),            \
  82         .value = &msdos_opt->_name,                                     \
  83         .minimum = _min,                                                \
  84         .maximum = sizeof(_type) == 1 ? 0xff :                          \
  85             (sizeof(_type) == 2 ? 0xffff :                              \
  86             (sizeof(_type) == 4 ? 0xffffffff : 0xffffffffffffffffLL)),  \
  87         .desc = _desc,                                          \
  88 },
  89 ALLOPTS
  90 #undef AOPT
  91                 { .name = NULL }
  92         };
  93
  94         fsopts->fs_specific = msdos_opt;
  95         fsopts->fs_options = copy_opts(msdos_options);
  96 }
  97
  98 void
  99 msdos_cleanup_opts(fsinfo_t *fsopts)
 100 {
 101         free(fsopts->fs_specific);
 102         free(fsopts->fs_options);
 103 }
 104
 105 int
 106 msdos_parse_opts(const char *option, fsinfo_t *fsopts)
 107 {
 108         struct msdos_options *msdos_opt = fsopts->fs_specific;
 109         option_t *msdos_options = fsopts->fs_options;
 110
 111         int rv;
 112
 113         assert(option != NULL);
 114         assert(fsopts != NULL);
 115         assert(msdos_opt != NULL);
 116
 117         if (debug & DEBUG_FS_PARSE_OPTS)
 118                 printf("msdos_parse_opts: got `%s'\n", option);
 119
 120         rv = set_option(msdos_options, option, NULL, 0);
 121         if (rv == -1)
 122                 return rv;
 123
 124         if (strcmp(msdos_options[rv].name, "volume_id") == 0)
 125                 msdos_opt->volume_id_set = 1;
 126         else if (strcmp(msdos_options[rv].name, "media_descriptor") == 0)
 127                 msdos_opt->media_descriptor_set = 1;
 128         else if (strcmp(msdos_options[rv].name, "hidden_sectors") == 0)
 129                 msdos_opt->hidden_sectors_set = 1;
 130         return 1;
 131 }
 132
 133
 134 void
 135 msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
 136 {
 137         struct msdos_options *msdos_opt = fsopts->fs_specific;
 138         struct vnode vp, rootvp;
 139         struct timeval  start;
 140         struct msdosfsmount *pmp;
 141
 142         assert(image != NULL);
 143         assert(dir != NULL);
 144         assert(root != NULL);
 145         assert(fsopts != NULL);
 146
 147         /*
 148          * XXX: pick up other options from the msdos specific ones?
 149          * Is minsize right here?
 150          */
 151         msdos_opt->create_size = MAX(msdos_opt->create_size, fsopts->minsize);
 152         msdos_opt->offset = fsopts->offset;
 153         if (msdos_opt->bytes_per_sector == 0) {
 154                 if (fsopts->sectorsize == -1)
 155                         fsopts->sectorsize = 512;
 156                 msdos_opt->bytes_per_sector = fsopts->sectorsize;
 157         } else if (fsopts->sectorsize == -1) {
 158                 fsopts->sectorsize = msdos_opt->bytes_per_sector;
 159         } else if (fsopts->sectorsize != msdos_opt->bytes_per_sector) {
 160                 err(1, "inconsistent sectorsize -S %u"
 161                     "!= -o bytes_per_sector %u",
 162                     fsopts->sectorsize, msdos_opt->bytes_per_sector);
 163         }
 164
 165                 /* create image */
 166         printf("Creating `%s'\n", image);
 167         TIMER_START(start);
 168         if (mkfs_msdos(image, NULL, msdos_opt) == -1)
 169                 return;
 170         TIMER_RESULTS(start, "mkfs_msdos");
 171
 172         fsopts->fd = open(image, O_RDWR);
 173         vp.fs = fsopts;
 174
 175         if ((pmp = msdosfs_mount(&vp, 0)) == NULL)
 176                 err(1, "msdosfs_mount");
 177
 178         if (msdosfs_root(pmp, &rootvp) != 0)
 179                 err(1, "msdosfs_root");
 180
 181         if (debug & DEBUG_FS_MAKEFS)
 182                 printf("msdos_makefs: image %s directory %s root %p\n",
 183                     image, dir, root);
 184
 185                 /* populate image */
 186         printf("Populating `%s'\n", image);
 187         TIMER_START(start);
 188         if (msdos_populate_dir(dir, VTODE(&rootvp), root, root, fsopts) == -1)
 189                 errx(1, "Image file `%s' not created.", image);
 190         TIMER_RESULTS(start, "msdos_populate_dir");
 191
 192         if (debug & DEBUG_FS_MAKEFS)
 193                 putchar('\n');
 194
 195                 /* ensure no outstanding buffers remain */
 196         if (debug & DEBUG_FS_MAKEFS)
 197                 bcleanup();
 198
 199         printf("Image `%s' complete\n", image);
 200 }
 201
 202 static int
 203 msdos_populate_dir(const char *path, struct denode *dir, fsnode *root,
 204     fsnode *parent, fsinfo_t *fsopts)
 205 {
 206         fsnode *cur;
 207         char pbuf[MAXPATHLEN];
 208
 209         assert(dir != NULL);
 210         assert(root != NULL);
 211         assert(fsopts != NULL);
 212
 213         for (cur = root->next; cur != NULL; cur = cur->next) {
 214                 if ((size_t)snprintf(pbuf, sizeof(pbuf), "%s/%s", path,
 215                     cur->name) >= sizeof(pbuf)) {
 216                         warnx("path %s too long", pbuf);
 217                         return -1;
 218                 }
 219
 220                 if ((cur->inode->flags & FI_ALLOCATED) == 0) {
 221                         cur->inode->flags |= FI_ALLOCATED;
 222                         if (cur != root) {
 223                                 fsopts->curinode++;
 224                                 cur->inode->ino = fsopts->curinode;
 225                                 cur->parent = parent;
 226                         }
 227                 }
 228
 229                 if (cur->inode->flags & FI_WRITTEN) {
 230                         continue;       // hard link
 231                 }
 232                 cur->inode->flags |= FI_WRITTEN;
 233
 234                 if (cur->child) {
 235                         struct denode *de;
 236                         if ((de = msdosfs_mkdire(pbuf, dir, cur)) == NULL) {
 237                                 warn("msdosfs_mkdire %s", pbuf);
 238                                 return -1;
 239                         }
 240                         if (msdos_populate_dir(pbuf, de, cur->child, cur,
 241                             fsopts) == -1) {
 242                                 warn("msdos_populate_dir %s", pbuf);
 243                                 return -1;
 244                         }
 245                         continue;
 246                 } else if (!S_ISREG(cur->type)) {
 247                         warnx("skipping non-regular file %s/%s", cur->path,
 248                             cur->name);
 249                         continue;
 250                 }
 251                 if (msdosfs_mkfile(pbuf, dir, cur) == NULL) {
 252                         warn("msdosfs_mkfile %s", pbuf);
 253                         return -1;
 254                 }
 255         }
 256         return 0;
 257 }