1/*	$NetBSD: msdos.c,v 1.25 2024/02/29 08:13:52 tkusumi 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 1.25 2024/02/29 08:13:52 tkusumi 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
65static int msdos_populate_dir(const char *, struct denode *, fsnode *,
66    fsnode *, fsinfo_t *);
67
68struct msdos_options_ex {
69	struct msdos_options options;
70	bool utf8;
71};
72
73void
74msdos_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},
93ALLOPTS
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
104void
105msdos_cleanup_opts(fsinfo_t *fsopts)
106{
107	free(fsopts->fs_specific);
108	free(fsopts->fs_options);
109}
110
111int
112msdos_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("%s: got `%s'\n", __func__, 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
138	return 1;
139}
140
141
142void
143msdos_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 vnode vp, rootvp;
147	struct timeval	start;
148	struct msdosfsmount *pmp;
149	uint32_t flags;
150
151	assert(image != NULL);
152	assert(dir != NULL);
153	assert(root != NULL);
154	assert(fsopts != NULL);
155
156	fsopts->size = fsopts->maxsize;
157	msdos_opt->options.create_size = MAX(msdos_opt->options.create_size,
158	    fsopts->offset + fsopts->size);
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(EXIT_FAILURE, "inconsistent sectorsize -S %u"
168		    "!= -o bytes_per_sector %u",
169		    fsopts->sectorsize, msdos_opt->options.bytes_per_sector);
170	}
171	if (stampst.st_ino) {
172		msdos_opt->options.timestamp_set = 1;
173		msdos_opt->options.timestamp = stampst.st_mtime;
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		errx(EXIT_FAILURE, "Image file `%s' not created.", image);
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(EXIT_FAILURE, "msdosfs_mount");
192
193	if (msdosfs_root(pmp, &rootvp) != 0)
194		err(EXIT_FAILURE, "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(EXIT_FAILURE, "Image file `%s' not populated.", 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
217static int
218msdos_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/%s",
230		    cur->root, cur->path, 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