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
msdos_prep_opts(fsinfo_t * fsopts)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
msdos_cleanup_opts(fsinfo_t * fsopts)102 msdos_cleanup_opts(fsinfo_t *fsopts)
103 {
104 free(fsopts->fs_specific);
105 free(fsopts->fs_options);
106 }
107
108 int
msdos_parse_opts(const char * option,fsinfo_t * fsopts)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
msdos_makefs(const char * image,const char * dir,fsnode * root,fsinfo_t * fsopts)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
msdos_populate_dir(const char * path,struct denode * dir,fsnode * root,fsnode * parent,fsinfo_t * fsopts)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