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
msdos_prep_opts(fsinfo_t * fsopts)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
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 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
msdos_makefs(const char * image,const char * dir,fsnode * root,fsinfo_t * fsopts)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
msdos_populate_dir(const char * path,struct denode * dir,fsnode * root,fsnode * parent,fsinfo_t * fsopts)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