| 0,0 → 1,197 |
|---|
| /*- |
| * 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 endianess and correct packing. |
| * |
| * NB! This file must be usable both in kernel and userland. |
| */ |
| |
| #include <sys/cdefs.h> |
| __FBSDID("$FreeBSD: src/sys/geom/geom_bsd_enc.c,v 1.6 2005/01/06 18:27:29 imp Exp $"); |
| |
| #include <sys/types.h> |
| #include <sys/endian.h> |
| #include <sys/errno.h> |
| #ifdef _KERNEL |
| #include <sys/systm.h> |
| #else |
| #include <string.h> |
| #endif |
| |
| #include "disklabel.h" |
| |
| void |
| nbsd_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 |
| nbsd_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 < NBSD_MAXPARTITIONS; i++) |
| nbsd_partition_le_dec(ptr + 148 + 16 * i, &d->d_partitions[i]); |
| return(0); |
| } |
| |
| void |
| nbsd_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 |
| nbsd_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++) |
| nbsd_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); |
| } |