2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2005 Takanori Watanabe
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
37 #include <geom/geom.h>
38 #include <geom/label/g_label.h>
40 #define NTFS_A_VOLUMENAME 0x60
41 #define NTFS_FILEMAGIC ((uint32_t)(0x454C4946))
42 #define NTFS_VOLUMEINO 3
44 #define G_LABEL_NTFS_DIR "ntfs"
53 uint8_t a_compression;
72 uint32_t fr_allocated;
77 struct ntfs_bootfile {
87 uint8_t reserver4[12];
90 uint64_t bf_mftmirrcn;
97 g_label_ntfs_taste(struct g_consumer *cp, char *label, size_t size)
99 struct g_provider *pp;
100 struct ntfs_bootfile *bf;
101 struct ntfs_filerec *fr;
102 struct ntfs_attr *atr;
110 g_topology_assert_not();
116 bf = (struct ntfs_bootfile *)g_read_data(cp, 0, pp->sectorsize, NULL);
117 if (bf == NULL || strncmp(bf->bf_sysid, "NTFS ", 8) != 0)
120 mftrecsz = bf->bf_mftrecsz;
121 recsize = (mftrecsz > 0) ? (mftrecsz * bf->bf_bps * bf->bf_spc) :
123 if (recsize <= 0 || recsize > MAXPHYS || recsize % pp->sectorsize != 0)
126 voloff = bf->bf_mftcn * bf->bf_spc * bf->bf_bps +
127 recsize * NTFS_VOLUMEINO;
128 if (voloff % pp->sectorsize != 0)
131 filerecp = g_read_data(cp, voloff, recsize, NULL);
132 if (filerecp == NULL)
134 fr = (struct ntfs_filerec *)filerecp;
135 if (fr->fr_hdrmagic != NTFS_FILEMAGIC)
138 for (recoff = fr->fr_attroff;
139 recoff <= recsize - 2 * sizeof(uint32_t);
140 recoff += atr->reclen) {
141 atr = (struct ntfs_attr *)(filerecp + recoff);
142 if (atr->a_type == -1)
144 if (atr->reclen < sizeof(*atr))
146 if (recsize - recoff < atr->reclen)
148 if (atr->a_type == NTFS_A_VOLUMENAME) {
149 if (atr->a_dataoff > atr->reclen ||
150 atr->a_datalen > atr->reclen - atr->a_dataoff)
155 * Should we need to use iconv(9)?
157 if (atr->a_datalen >= size * 2 ||
158 atr->a_datalen % 2 != 0)
160 for (j = 0; j < atr->a_datalen; j++) {
161 vnchar = ((char *)atr)[atr->a_dataoff + j];
168 label[j / 2] = vnchar;
178 if (filerecp != NULL)
182 struct g_label_desc g_label_ntfs = {
183 .ld_taste = g_label_ntfs_taste,
184 .ld_dir = G_LABEL_NTFS_DIR,
188 G_LABEL_INIT(ntfs, g_label_ntfs, "Create device nodes for NTFS volumes");