mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
197 lines
6.1 KiB
C
197 lines
6.1 KiB
C
/*-
|
|
* Copyright (c) 2002 Poul-Henning Kamp
|
|
* Copyright (c) 2002 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
|
|
* and NAI Labs, the Security Research Division of Network Associates, Inc.
|
|
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
|
|
* DARPA CHATS research program.
|
|
*
|
|
* 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.
|
|
* 3. The names of the authors may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Functions to encode and decode struct disklabel and struct partition into
|
|
* a bytestream of little endianness and correct packing.
|
|
*
|
|
* NB! This file must be usable both in kernel and userland.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/disklabel.h>
|
|
#include <sys/errno.h>
|
|
#ifdef _KERNEL
|
|
#include <sys/systm.h>
|
|
#else
|
|
#include <string.h>
|
|
#endif
|
|
|
|
void
|
|
bsd_partition_le_dec(u_char *ptr, struct partition *d)
|
|
{
|
|
d->p_size = le32dec(ptr + 0);
|
|
d->p_offset = le32dec(ptr + 4);
|
|
d->p_fsize = le32dec(ptr + 8);
|
|
d->p_fstype = ptr[12];
|
|
d->p_frag = ptr[13];
|
|
d->p_cpg = le16dec(ptr + 14);
|
|
}
|
|
|
|
int
|
|
bsd_disklabel_le_dec(u_char *ptr, struct disklabel *d, int maxpart)
|
|
{
|
|
int i;
|
|
u_char *p, *pe;
|
|
uint16_t sum;
|
|
|
|
d->d_magic = le32dec(ptr + 0);
|
|
if (d->d_magic != DISKMAGIC)
|
|
return(EINVAL);
|
|
|
|
d->d_magic2 = le32dec(ptr + 132);
|
|
if (d->d_magic2 != DISKMAGIC) {
|
|
return(EINVAL);
|
|
}
|
|
|
|
d->d_npartitions = le16dec(ptr + 138);
|
|
if (d->d_npartitions > maxpart) {
|
|
return(EINVAL);
|
|
}
|
|
|
|
pe = ptr + 148 + 16 * d->d_npartitions;
|
|
sum = 0;
|
|
for (p = ptr; p < pe; p += 2)
|
|
sum ^= le16dec(p);
|
|
if (sum != 0) {
|
|
return(EINVAL);
|
|
}
|
|
|
|
d->d_type = le16dec(ptr + 4);
|
|
d->d_subtype = le16dec(ptr + 6);
|
|
bcopy(ptr + 8, d->d_typename, 16);
|
|
bcopy(ptr + 24, d->d_packname, 16);
|
|
d->d_secsize = le32dec(ptr + 40);
|
|
d->d_nsectors = le32dec(ptr + 44);
|
|
d->d_ntracks = le32dec(ptr + 48);
|
|
d->d_ncylinders = le32dec(ptr + 52);
|
|
d->d_secpercyl = le32dec(ptr + 56);
|
|
d->d_secperunit = le32dec(ptr + 60);
|
|
d->d_sparespertrack = le16dec(ptr + 64);
|
|
d->d_sparespercyl = le16dec(ptr + 66);
|
|
d->d_acylinders = le32dec(ptr + 68);
|
|
d->d_rpm = le16dec(ptr + 72);
|
|
d->d_interleave = le16dec(ptr + 74);
|
|
d->d_trackskew = le16dec(ptr + 76);
|
|
d->d_cylskew = le16dec(ptr + 78);
|
|
d->d_headswitch = le32dec(ptr + 80);
|
|
d->d_trkseek = le32dec(ptr + 84);
|
|
d->d_flags = le32dec(ptr + 88);
|
|
d->d_drivedata[0] = le32dec(ptr + 92);
|
|
d->d_drivedata[1] = le32dec(ptr + 96);
|
|
d->d_drivedata[2] = le32dec(ptr + 100);
|
|
d->d_drivedata[3] = le32dec(ptr + 104);
|
|
d->d_drivedata[4] = le32dec(ptr + 108);
|
|
d->d_spare[0] = le32dec(ptr + 112);
|
|
d->d_spare[1] = le32dec(ptr + 116);
|
|
d->d_spare[2] = le32dec(ptr + 120);
|
|
d->d_spare[3] = le32dec(ptr + 124);
|
|
d->d_spare[4] = le32dec(ptr + 128);
|
|
d->d_checksum = le16dec(ptr + 136);
|
|
d->d_npartitions = le16dec(ptr + 138);
|
|
d->d_bbsize = le32dec(ptr + 140);
|
|
d->d_sbsize = le32dec(ptr + 144);
|
|
for (i = 0; i < d->d_npartitions; i++)
|
|
bsd_partition_le_dec(ptr + 148 + 16 * i, &d->d_partitions[i]);
|
|
return(0);
|
|
}
|
|
|
|
void
|
|
bsd_partition_le_enc(u_char *ptr, struct partition *d)
|
|
{
|
|
le32enc(ptr + 0, d->p_size);
|
|
le32enc(ptr + 4, d->p_offset);
|
|
le32enc(ptr + 8, d->p_fsize);
|
|
ptr[12] = d->p_fstype;
|
|
ptr[13] = d->p_frag;
|
|
le16enc(ptr + 14, d->p_cpg);
|
|
}
|
|
|
|
void
|
|
bsd_disklabel_le_enc(u_char *ptr, struct disklabel *d)
|
|
{
|
|
int i;
|
|
u_char *p, *pe;
|
|
uint16_t sum;
|
|
|
|
le32enc(ptr + 0, d->d_magic);
|
|
le16enc(ptr + 4, d->d_type);
|
|
le16enc(ptr + 6, d->d_subtype);
|
|
bcopy(d->d_typename, ptr + 8, 16);
|
|
bcopy(d->d_packname, ptr + 24, 16);
|
|
le32enc(ptr + 40, d->d_secsize);
|
|
le32enc(ptr + 44, d->d_nsectors);
|
|
le32enc(ptr + 48, d->d_ntracks);
|
|
le32enc(ptr + 52, d->d_ncylinders);
|
|
le32enc(ptr + 56, d->d_secpercyl);
|
|
le32enc(ptr + 60, d->d_secperunit);
|
|
le16enc(ptr + 64, d->d_sparespertrack);
|
|
le16enc(ptr + 66, d->d_sparespercyl);
|
|
le32enc(ptr + 68, d->d_acylinders);
|
|
le16enc(ptr + 72, d->d_rpm);
|
|
le16enc(ptr + 74, d->d_interleave);
|
|
le16enc(ptr + 76, d->d_trackskew);
|
|
le16enc(ptr + 78, d->d_cylskew);
|
|
le32enc(ptr + 80, d->d_headswitch);
|
|
le32enc(ptr + 84, d->d_trkseek);
|
|
le32enc(ptr + 88, d->d_flags);
|
|
le32enc(ptr + 92, d->d_drivedata[0]);
|
|
le32enc(ptr + 96, d->d_drivedata[1]);
|
|
le32enc(ptr + 100, d->d_drivedata[2]);
|
|
le32enc(ptr + 104, d->d_drivedata[3]);
|
|
le32enc(ptr + 108, d->d_drivedata[4]);
|
|
le32enc(ptr + 112, d->d_spare[0]);
|
|
le32enc(ptr + 116, d->d_spare[1]);
|
|
le32enc(ptr + 120, d->d_spare[2]);
|
|
le32enc(ptr + 124, d->d_spare[3]);
|
|
le32enc(ptr + 128, d->d_spare[4]);
|
|
le32enc(ptr + 132, d->d_magic2);
|
|
le16enc(ptr + 136, 0);
|
|
le16enc(ptr + 138, d->d_npartitions);
|
|
le32enc(ptr + 140, d->d_bbsize);
|
|
le32enc(ptr + 144, d->d_sbsize);
|
|
for (i = 0; i < d->d_npartitions; i++)
|
|
bsd_partition_le_enc(ptr + 148 + 16 * i, &d->d_partitions[i]);
|
|
pe = ptr + 148 + 16 * d->d_npartitions;
|
|
sum = 0;
|
|
for (p = ptr; p < pe; p += 2)
|
|
sum ^= le16dec(p);
|
|
le16enc(ptr + 136, sum);
|
|
}
|