1 /* $OpenBSD: msdos.c,v 1.13 2021/10/06 00:40:39 deraadt Exp $ */
2 /* $NetBSD: msdos.c,v 1.16 2016/01/30 09:59:27 mlelstv Exp $ */
3
4 /*-
5 * Copyright (c) 2013 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Christos Zoulas.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/types.h>
34 #include <assert.h>
35 #include <fcntl.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <limits.h>
39 #include <string.h>
40
41 #include "ffs/buf.h"
42 #include "msdos/denode.h"
43 #include "makefs.h"
44 #include "msdos.h"
45 #include "msdos/mkfs_msdos.h"
46
47 static int msdos_populate_dir(const char *, struct denode *, fsnode *,
48 fsnode *, fsinfo_t *);
49
50 void
msdos_prep_opts(fsinfo_t * fsopts)51 msdos_prep_opts(fsinfo_t *fsopts)
52 {
53 struct msdos_options *msdos_opt = ecalloc(1, sizeof(*msdos_opt));
54 const option_t msdos_options[] = {
55 #define AOPT(_type, _name, _min) { \
56 .name = # _name, \
57 .type = _min == -1 ? OPT_STRPTR : \
58 (_min == -2 ? OPT_BOOL : \
59 (sizeof(_type) == 1 ? OPT_INT8 : \
60 (sizeof(_type) == 2 ? OPT_INT16 : \
61 (sizeof(_type) == 4 ? OPT_INT32 : OPT_INT64)))), \
62 .value = &msdos_opt->_name, \
63 .minimum = _min, \
64 .maximum = sizeof(_type) == 1 ? 0xff : \
65 (sizeof(_type) == 2 ? 0xffff : \
66 (sizeof(_type) == 4 ? 0xffffffff : 0x7fffffffffffffffLL)), \
67 },
68 ALLOPTS
69 #undef AOPT
70 { .name = NULL }
71 };
72
73 fsopts->fs_specific = msdos_opt;
74 fsopts->fs_options = copy_opts(msdos_options);
75 }
76
77 void
msdos_cleanup_opts(fsinfo_t * fsopts)78 msdos_cleanup_opts(fsinfo_t *fsopts)
79 {
80 free(fsopts->fs_specific);
81 free(fsopts->fs_options);
82 }
83
84 int
msdos_parse_opts(const char * option,fsinfo_t * fsopts)85 msdos_parse_opts(const char *option, fsinfo_t *fsopts)
86 {
87 struct msdos_options *msdos_opt = fsopts->fs_specific;
88 option_t *msdos_options = fsopts->fs_options;
89
90 int rv;
91
92 assert(option != NULL);
93 assert(fsopts != NULL);
94 assert(msdos_opt != NULL);
95
96 rv = set_option(msdos_options, option, NULL, 0);
97 if (rv == -1)
98 return rv;
99
100 if (strcmp(msdos_options[rv].name, "volume_id") == 0)
101 msdos_opt->volume_id_set = 1;
102 else if (strcmp(msdos_options[rv].name, "media_descriptor") == 0)
103 msdos_opt->media_descriptor_set = 1;
104 else if (strcmp(msdos_options[rv].name, "hidden_sectors") == 0)
105 msdos_opt->hidden_sectors_set = 1;
106 return 1;
107 }
108
109
110 void
msdos_makefs(const char * image,const char * dir,fsnode * root,fsinfo_t * fsopts)111 msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts)
112 {
113 struct msdos_options *msdos_opt = fsopts->fs_specific;
114 struct mkfsvnode vp, rootvp;
115 struct msdosfsmount *pmp;
116
117 assert(image != NULL);
118 assert(dir != NULL);
119 assert(root != NULL);
120 assert(fsopts != NULL);
121
122 /*
123 * XXX: pick up other options from the msdos specific ones?
124 * Is minsize right here?
125 */
126 msdos_opt->create_size = MAXIMUM(msdos_opt->create_size,
127 fsopts->minsize);
128 msdos_opt->offset = fsopts->offset;
129 if (msdos_opt->bytes_per_sector == 0) {
130 if (fsopts->sectorsize == -1)
131 fsopts->sectorsize = 512;
132 msdos_opt->bytes_per_sector = fsopts->sectorsize;
133 } else if (fsopts->sectorsize == -1) {
134 fsopts->sectorsize = msdos_opt->bytes_per_sector;
135 } else if (fsopts->sectorsize != msdos_opt->bytes_per_sector) {
136 err(1, "inconsistent sectorsize -S %u"
137 "!= -o bytes_per_sector %u",
138 fsopts->sectorsize, msdos_opt->bytes_per_sector);
139 }
140
141 /* create image */
142 printf("Creating `%s'\n", image);
143 if (mkfs_msdos(image, NULL, msdos_opt) == -1)
144 return;
145
146 fsopts->fd = open(image, O_RDWR);
147 vp.fs = fsopts;
148
149 if ((pmp = msdosfs_mount(&vp, 0)) == NULL)
150 err(1, "msdosfs_mount");
151
152 if (msdosfs_root(pmp, &rootvp) != 0)
153 err(1, "msdosfs_root");
154
155 /* populate image */
156 printf("Populating `%s'\n", image);
157 if (msdos_populate_dir(dir, VTODE(&rootvp), root, root, fsopts) == -1)
158 errx(1, "Image file `%s' not created.", image);
159
160 bcleanup();
161
162 printf("Image `%s' complete\n", image);
163 }
164
165 static int
msdos_populate_dir(const char * path,struct denode * dir,fsnode * root,fsnode * parent,fsinfo_t * fsopts)166 msdos_populate_dir(const char *path, struct denode *dir, fsnode *root,
167 fsnode *parent, fsinfo_t *fsopts)
168 {
169 fsnode *cur;
170 char pbuf[PATH_MAX];
171
172 assert(dir != NULL);
173 assert(root != NULL);
174 assert(fsopts != NULL);
175
176 for (cur = root->next; cur != NULL; cur = cur->next) {
177 if ((size_t)snprintf(pbuf, sizeof(pbuf), "%s/%s", path,
178 cur->name) >= sizeof(pbuf)) {
179 warnx("path %s too long", pbuf);
180 return -1;
181 }
182
183 if ((cur->inode->flags & FI_ALLOCATED) == 0) {
184 cur->inode->flags |= FI_ALLOCATED;
185 if (cur != root) {
186 fsopts->curinode++;
187 cur->inode->ino = fsopts->curinode;
188 cur->parent = parent;
189 }
190 }
191
192 if (cur->inode->flags & FI_WRITTEN) {
193 continue; // hard link
194 }
195 cur->inode->flags |= FI_WRITTEN;
196
197 if (cur->child) {
198 struct denode *de;
199 if ((de = msdosfs_mkdire(pbuf, dir, cur)) == NULL) {
200 warn("msdosfs_mkdire %s", pbuf);
201 return -1;
202 }
203 if (msdos_populate_dir(pbuf, de, cur->child, cur,
204 fsopts) == -1) {
205 warn("msdos_populate_dir %s", pbuf);
206 return -1;
207 }
208 continue;
209 } else if (!S_ISREG(cur->type)) {
210 warnx("skipping non-regular file %s/%s", cur->path,
211 cur->name);
212 continue;
213 }
214 if (msdosfs_mkfile(pbuf, dir, cur) == NULL) {
215 warn("msdosfs_mkfile %s", pbuf);
216 return -1;
217 }
218 }
219 return 0;
220 }
221