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/param.h>
36
37 #if !HAVE_NBTOOL_CONFIG_H
38 #include <sys/mount.h>
39 #endif
40
41 #include <assert.h>
42 #include <errno.h>
43 #include <fcntl.h>
44 #include <stdarg.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <stdint.h>
49 #include <unistd.h>
50 #include <dirent.h>
51 #include <util.h>
52
53 #include <mkfs_msdos.h>
54 #include <fs/msdosfs/bpb.h>
55 #include "msdos/direntry.h"
56 #include "msdos/denode.h"
57 #include <fs/msdosfs/msdosfsmount.h>
58
59 #undef clrbuf
60 #include "ffs/buf.h"
61 #include "makefs.h"
62 #include "msdos.h"
63
64 static int msdos_populate_dir(const char *, struct denode *, fsnode *,
65 fsnode *, fsinfo_t *);
66
67 struct msdos_options_ex {
68 struct msdos_options options;
69 };
70
71 void
msdos_prep_opts(fsinfo_t * fsopts)72 msdos_prep_opts(fsinfo_t *fsopts)
73 {
74 struct msdos_options_ex *msdos_opt = ecalloc(1, sizeof(*msdos_opt));
75 const option_t msdos_options[] = {
76 #define AOPT(_opt, _type, _name, _min, _desc) { \
77 .letter = _opt, \
78 .name = # _name, \
79 .type = _min == -1 ? OPT_STRPTR : \
80 (_min == -2 ? OPT_BOOL : \
81 (sizeof(_type) == 1 ? OPT_INT8 : \
82 (sizeof(_type) == 2 ? OPT_INT16 : \
83 (sizeof(_type) == 4 ? OPT_INT32 : OPT_INT64)))), \
84 .value = &msdos_opt->options._name, \
85 .minimum = _min, \
86 .maximum = sizeof(_type) == 1 ? UINT8_MAX : \
87 (sizeof(_type) == 2 ? UINT16_MAX : \
88 (sizeof(_type) == 4 ? UINT32_MAX : INT64_MAX)), \
89 .desc = _desc, \
90 },
91 ALLOPTS
92 #undef AOPT
93 { .name = NULL }
94 };
95
96 fsopts->fs_specific = msdos_opt;
97 fsopts->fs_options = copy_opts(msdos_options);
98 }
99
100 void
msdos_cleanup_opts(fsinfo_t * fsopts)101 msdos_cleanup_opts(fsinfo_t *fsopts)
102 {
103 free(fsopts->fs_specific);
104 free(fsopts->fs_options);
105 }
106
107 int
msdos_parse_opts(const char * option,fsinfo_t * fsopts)108 msdos_parse_opts(const char *option, fsinfo_t *fsopts)
109 {
110 struct msdos_options *msdos_opt = fsopts->fs_specific;
111 option_t *msdos_options = fsopts->fs_options;
112 int rv;
113
114 assert(option != NULL);
115 assert(fsopts != NULL);
116 assert(msdos_opt != NULL);
117
118 if (debug & DEBUG_FS_PARSE_OPTS)
119 printf("msdos_parse_opts: got `%s'\n", option);
120
121 rv = set_option(msdos_options, option, NULL, 0);
122 if (rv == -1)
123 return rv;
124
125 if (strcmp(msdos_options[rv].name, "volume_id") == 0)
126 msdos_opt->volume_id_set = 1;
127 else if (strcmp(msdos_options[rv].name, "media_descriptor") == 0)
128 msdos_opt->media_descriptor_set = 1;
129 else if (strcmp(msdos_options[rv].name, "hidden_sectors") == 0)
130 msdos_opt->hidden_sectors_set = 1;
131
132 if (stampst.st_ino) {
133 msdos_opt->timestamp_set = 1;
134 msdos_opt->timestamp = stampst.st_mtime;
135 }
136
137 return 1;
138 }
139
140
141 void
msdos_makefs(const char * image,const char * dir,fsnode * root,fsinfo_t * fsopts)142 msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
143 {
144 struct msdos_options_ex *msdos_opt = fsopts->fs_specific;
145 struct m_vnode vp, rootvp;
146 struct timeval start;
147 struct msdosfsmount *pmp;
148
149 assert(image != NULL);
150 assert(dir != NULL);
151 assert(root != NULL);
152 assert(fsopts != NULL);
153
154 fsopts->size = fsopts->maxsize;
155 msdos_opt->options.create_size = MAX(msdos_opt->options.create_size,
156 fsopts->offset + fsopts->size);
157 if (fsopts->offset > 0)
158 msdos_opt->options.offset = fsopts->offset;
159 if (msdos_opt->options.bytes_per_sector == 0) {
160 if (fsopts->sectorsize == -1)
161 fsopts->sectorsize = 512;
162 msdos_opt->options.bytes_per_sector = fsopts->sectorsize;
163 } else if (fsopts->sectorsize == -1) {
164 fsopts->sectorsize = msdos_opt->options.bytes_per_sector;
165 } else if (fsopts->sectorsize != msdos_opt->options.bytes_per_sector) {
166 err(1, "inconsistent sectorsize -S %u"
167 "!= -o bytes_per_sector %u",
168 fsopts->sectorsize, msdos_opt->options.bytes_per_sector);
169 }
170
171 /* create image */
172 printf("Creating `%s'\n", image);
173 TIMER_START(start);
174 if (mkfs_msdos(image, NULL, &msdos_opt->options) == -1)
175 return;
176 TIMER_RESULTS(start, "mkfs_msdos");
177
178 fsopts->fd = open(image, O_RDWR);
179 vp.fs = fsopts;
180
181 if ((pmp = m_msdosfs_mount(&vp)) == NULL)
182 err(1, "msdosfs_mount");
183
184 if (msdosfs_root(pmp, &rootvp) != 0)
185 err(1, "msdosfs_root");
186
187 if (debug & DEBUG_FS_MAKEFS)
188 printf("msdos_makefs: image %s directory %s root %p\n",
189 image, dir, root);
190
191 /* populate image */
192 printf("Populating `%s'\n", image);
193 TIMER_START(start);
194 if (msdos_populate_dir(dir, VTODE(&rootvp), root, root, fsopts) == -1)
195 errx(1, "Image file `%s' not created.", image);
196 TIMER_RESULTS(start, "msdos_populate_dir");
197
198 if (msdosfs_fsiflush(pmp) != 0)
199 errx(1, "Unable to update FSInfo block.");
200 if (debug & DEBUG_FS_MAKEFS)
201 putchar('\n');
202
203 /* ensure no outstanding buffers remain */
204 if (debug & DEBUG_FS_MAKEFS)
205 bcleanup();
206
207 printf("Image `%s' complete\n", image);
208 }
209
210 static int
msdos_populate_dir(const char * path,struct denode * dir,fsnode * root,fsnode * parent,fsinfo_t * fsopts)211 msdos_populate_dir(const char *path, struct denode *dir, fsnode *root,
212 fsnode *parent, fsinfo_t *fsopts)
213 {
214 fsnode *cur;
215 char pbuf[MAXPATHLEN];
216
217 assert(dir != NULL);
218 assert(root != NULL);
219 assert(fsopts != NULL);
220
221 for (cur = root->next; cur != NULL; cur = cur->next) {
222 if ((size_t)snprintf(pbuf, sizeof(pbuf), "%s/%s", path,
223 cur->name) >= sizeof(pbuf)) {
224 warnx("path %s too long", pbuf);
225 return -1;
226 }
227
228 if ((cur->inode->flags & FI_ALLOCATED) == 0) {
229 cur->inode->flags |= FI_ALLOCATED;
230 if (cur != root) {
231 fsopts->curinode++;
232 cur->inode->ino = fsopts->curinode;
233 cur->parent = parent;
234 }
235 }
236
237 if (cur->inode->flags & FI_WRITTEN) {
238 continue; // hard link
239 }
240 cur->inode->flags |= FI_WRITTEN;
241
242 if (cur->child) {
243 struct denode *de;
244 if ((de = msdosfs_mkdire(pbuf, dir, cur)) == NULL) {
245 warn("msdosfs_mkdire %s", pbuf);
246 return -1;
247 }
248 if (msdos_populate_dir(pbuf, de, cur->child, cur,
249 fsopts) == -1) {
250 warn("msdos_populate_dir %s", pbuf);
251 return -1;
252 }
253 continue;
254 } else if (!S_ISREG(cur->type)) {
255 warnx("skipping non-regular file %s/%s", cur->path,
256 cur->name);
257 continue;
258 }
259 if (msdosfs_mkfile(cur->contents ? cur->contents : pbuf, dir,
260 cur) == NULL) {
261 warn("msdosfs_mkfile %s", pbuf);
262 return -1;
263 }
264 }
265 return 0;
266 }
267