1 /* $NetBSD: msdos.c,v 1.21 2022/04/09 10:05:35 riastradh 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 __RCSID("$NetBSD: msdos.c,v 1.21 2022/04/09 10:05:35 riastradh Exp $");
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 <unistd.h>
54 #include <dirent.h>
55 #include <util.h>
56
57 #include <ffs/buf.h>
58 #include <fs/msdosfs/bpb.h>
59 #include <fs/msdosfs/denode.h>
60 #include <fs/msdosfs/msdosfsmount.h>
61 #include "makefs.h"
62 #include "msdos.h"
63 #include "mkfs_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 bool utf8;
71 };
72
73 void
msdos_prep_opts(fsinfo_t * fsopts)74 msdos_prep_opts(fsinfo_t *fsopts)
75 {
76 struct msdos_options_ex *msdos_opt = ecalloc(1, sizeof(*msdos_opt));
77 const option_t msdos_options[] = {
78 #define AOPT(_opt, _type, _name, _min, _desc) { \
79 .letter = _opt, \
80 .name = # _name, \
81 .type = _min == -1 ? OPT_STRPTR : \
82 (_min == -2 ? OPT_BOOL : \
83 (sizeof(_type) == 1 ? OPT_INT8 : \
84 (sizeof(_type) == 2 ? OPT_INT16 : \
85 (sizeof(_type) == 4 ? OPT_INT32 : OPT_INT64)))), \
86 .value = &msdos_opt->options._name, \
87 .minimum = _min, \
88 .maximum = sizeof(_type) == 1 ? 0xff : \
89 (sizeof(_type) == 2 ? 0xffff : \
90 (sizeof(_type) == 4 ? 0xffffffff : 0xffffffffffffffffLL)), \
91 .desc = _desc, \
92 },
93 ALLOPTS
94 #undef AOPT
95 { 'U', "utf8", &msdos_opt->utf8, OPT_BOOL,
96 0, 1, "Use UTF8 names" },
97 { .name = NULL }
98 };
99
100 fsopts->fs_specific = msdos_opt;
101 fsopts->fs_options = copy_opts(msdos_options);
102 }
103
104 void
msdos_cleanup_opts(fsinfo_t * fsopts)105 msdos_cleanup_opts(fsinfo_t *fsopts)
106 {
107 free(fsopts->fs_specific);
108 free(fsopts->fs_options);
109 }
110
111 int
msdos_parse_opts(const char * option,fsinfo_t * fsopts)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
117 int rv;
118
119 assert(option != NULL);
120 assert(fsopts != NULL);
121 assert(msdos_opt != NULL);
122
123 if (debug & DEBUG_FS_PARSE_OPTS)
124 printf("msdos_parse_opts: got `%s'\n", option);
125
126 rv = set_option(msdos_options, option, NULL, 0);
127 if (rv == -1)
128 return rv;
129
130 if (strcmp(msdos_options[rv].name, "volume_id") == 0)
131 msdos_opt->volume_id_set = 1;
132 else if (strcmp(msdos_options[rv].name, "media_descriptor") == 0)
133 msdos_opt->media_descriptor_set = 1;
134 else if (strcmp(msdos_options[rv].name, "hidden_sectors") == 0)
135 msdos_opt->hidden_sectors_set = 1;
136
137 if (stampst.st_ino) {
138 msdos_opt->timestamp_set = 1;
139 msdos_opt->timestamp = stampst.st_mtime;
140 }
141
142 return 1;
143 }
144
145
146 void
msdos_makefs(const char * image,const char * dir,fsnode * root,fsinfo_t * fsopts)147 msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
148 {
149 struct msdos_options_ex *msdos_opt = fsopts->fs_specific;
150 struct vnode vp, rootvp;
151 struct timeval start;
152 struct msdosfsmount *pmp;
153 uint32_t flags;
154
155 assert(image != NULL);
156 assert(dir != NULL);
157 assert(root != NULL);
158 assert(fsopts != NULL);
159
160 fsopts->size = fsopts->maxsize;
161 msdos_opt->options.create_size = MAX(msdos_opt->options.create_size,
162 fsopts->offset + fsopts->size);
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 (msdos_opt->utf8)
188 flags |= MSDOSFSMNT_UTF8;
189
190 if ((pmp = msdosfs_mount(&vp, flags)) == NULL)
191 err(1, "msdosfs_mount");
192
193 if (msdosfs_root(pmp, &rootvp) != 0)
194 err(1, "msdosfs_root");
195
196 if (debug & DEBUG_FS_MAKEFS)
197 printf("msdos_makefs: image %s directory %s root %p\n",
198 image, dir, root);
199
200 /* populate image */
201 printf("Populating `%s'\n", image);
202 TIMER_START(start);
203 if (msdos_populate_dir(dir, VTODE(&rootvp), root, root, fsopts) == -1)
204 errx(1, "Image file `%s' not created.", image);
205 TIMER_RESULTS(start, "msdos_populate_dir");
206
207 if (debug & DEBUG_FS_MAKEFS)
208 putchar('\n');
209
210 /* ensure no outstanding buffers remain */
211 if (debug & DEBUG_FS_MAKEFS)
212 bcleanup();
213
214 printf("Image `%s' complete\n", image);
215 }
216
217 static int
msdos_populate_dir(const char * path,struct denode * dir,fsnode * root,fsnode * parent,fsinfo_t * fsopts)218 msdos_populate_dir(const char *path, struct denode *dir, fsnode *root,
219 fsnode *parent, fsinfo_t *fsopts)
220 {
221 fsnode *cur;
222 char pbuf[MAXPATHLEN];
223
224 assert(dir != NULL);
225 assert(root != NULL);
226 assert(fsopts != NULL);
227
228 for (cur = root->next; cur != NULL; cur = cur->next) {
229 if ((size_t)snprintf(pbuf, sizeof(pbuf), "%s/%s", path,
230 cur->name) >= sizeof(pbuf)) {
231 warnx("path %s too long", pbuf);
232 return -1;
233 }
234
235 if ((cur->inode->flags & FI_ALLOCATED) == 0) {
236 cur->inode->flags |= FI_ALLOCATED;
237 if (cur != root) {
238 fsopts->curinode++;
239 cur->inode->ino = fsopts->curinode;
240 cur->parent = parent;
241 }
242 }
243
244 if (cur->inode->flags & FI_WRITTEN) {
245 continue; // hard link
246 }
247 cur->inode->flags |= FI_WRITTEN;
248
249 if (cur->child) {
250 struct denode *de;
251 if ((de = msdosfs_mkdire(pbuf, dir, cur)) == NULL) {
252 warn("msdosfs_mkdire %s", pbuf);
253 return -1;
254 }
255 if (msdos_populate_dir(pbuf, de, cur->child, cur,
256 fsopts) == -1) {
257 warn("msdos_populate_dir %s", pbuf);
258 return -1;
259 }
260 continue;
261 } else if (!S_ISREG(cur->type)) {
262 warnx("skipping non-regular file %s/%s", cur->path,
263 cur->name);
264 continue;
265 }
266 if (msdosfs_mkfile(pbuf, dir, cur) == NULL) {
267 warn("msdosfs_mkfile %s", pbuf);
268 return -1;
269 }
270 }
271 return 0;
272 }
273