121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*-
|
|
* Copyright (c) 2005 Takanori Watanabe
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <fs/ntfs/ntfs.h>
|
|
|
|
#include <geom/geom.h>
|
|
#include <geom/label/g_label.h>
|
|
|
|
#define G_LABEL_NTFS_DIR "ntfs"
|
|
|
|
|
|
static void
|
|
g_label_ntfs_taste(struct g_consumer *cp, char *label, size_t size)
|
|
{
|
|
struct g_provider *pp;
|
|
struct bootfile *bf;
|
|
struct filerec *fr;
|
|
struct attr *atr;
|
|
off_t voloff;
|
|
char *filerecp, *ap;
|
|
char mftrecsz, vnchar;
|
|
int recsize, j;
|
|
|
|
g_topology_assert_not();
|
|
|
|
label[0] = '\0';
|
|
pp = cp->provider;
|
|
filerecp = NULL;
|
|
|
|
bf = (struct bootfile *)g_read_data(cp, 0, pp->sectorsize, NULL);
|
|
if (bf == NULL || strncmp(bf->bf_sysid, "NTFS ", 8) != 0)
|
|
goto done;
|
|
|
|
mftrecsz = (char)bf->bf_mftrecsz;
|
|
recsize = (mftrecsz > 0) ? (mftrecsz * bf->bf_bps * bf->bf_spc) : (1 << -mftrecsz);
|
|
if (recsize % pp->sectorsize != 0)
|
|
goto done;
|
|
|
|
voloff = bf->bf_mftcn * bf->bf_spc * bf->bf_bps +
|
|
recsize * NTFS_VOLUMEINO;
|
|
if (voloff % pp->sectorsize != 0)
|
|
goto done;
|
|
|
|
filerecp = g_read_data(cp, voloff, recsize, NULL);
|
|
if (filerecp == NULL)
|
|
goto done;
|
|
fr = (struct filerec *)filerecp;
|
|
|
|
if (fr->fr_fixup.fh_magic != NTFS_FILEMAGIC)
|
|
goto done;
|
|
|
|
for (ap = filerecp + fr->fr_attroff;
|
|
atr = (struct attr *)ap, atr->a_hdr.a_type != -1;
|
|
ap += atr->a_hdr.reclen) {
|
|
if (atr->a_hdr.a_type == NTFS_A_VOLUMENAME) {
|
|
if(atr->a_r.a_datalen >= size *2){
|
|
label[0] = 0;
|
|
goto done;
|
|
}
|
|
/*
|
|
*UNICODE to ASCII.
|
|
* Should we need to use iconv(9)?
|
|
*/
|
|
for (j = 0; j < atr->a_r.a_datalen; j++) {
|
|
vnchar = *(ap + atr->a_r.a_dataoff + j);
|
|
if (j & 1) {
|
|
if (vnchar) {
|
|
label[0] = 0;
|
|
goto done;
|
|
}
|
|
} else {
|
|
label[j / 2] = vnchar;
|
|
}
|
|
}
|
|
label[j / 2] = 0;
|
|
break;
|
|
}
|
|
}
|
|
done:
|
|
if (bf != NULL)
|
|
g_free(bf);
|
|
if (filerecp != NULL)
|
|
g_free(filerecp);
|
|
}
|
|
|
|
const struct g_label_desc g_label_ntfs = {
|
|
.ld_taste = g_label_ntfs_taste,
|
|
.ld_dir = G_LABEL_NTFS_DIR
|
|
};
|