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
68static int msdos_populate_dir(const char *, struct denode *, fsnode *,
69    fsnode *, fsinfo_t *);
70
71struct msdos_options_ex {
72	struct msdos_options options;
73};
74
75void
76msdos_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},
95ALLOPTS
96#undef AOPT
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	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
145void
146msdos_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
216static int
217msdos_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