geom_bsd_enc.c revision 114548
1113593Sphk/*- 2113593Sphk * Copyright (c) 2002 Poul-Henning Kamp 3113593Sphk * Copyright (c) 2002 Networks Associates Technology, Inc. 4113593Sphk * All rights reserved. 5113593Sphk * 6113593Sphk * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7113593Sphk * and NAI Labs, the Security Research Division of Network Associates, Inc. 8113593Sphk * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9113593Sphk * DARPA CHATS research program. 10113593Sphk * 11113593Sphk * Redistribution and use in source and binary forms, with or without 12113593Sphk * modification, are permitted provided that the following conditions 13113593Sphk * are met: 14113593Sphk * 1. Redistributions of source code must retain the above copyright 15113593Sphk * notice, this list of conditions and the following disclaimer. 16113593Sphk * 2. Redistributions in binary form must reproduce the above copyright 17113593Sphk * notice, this list of conditions and the following disclaimer in the 18113593Sphk * documentation and/or other materials provided with the distribution. 19113593Sphk * 3. The names of the authors may not be used to endorse or promote 20113593Sphk * products derived from this software without specific prior written 21113593Sphk * permission. 22113593Sphk * 23113593Sphk * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24113593Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25113593Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26113593Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27113593Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28113593Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29113593Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30113593Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31113593Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32113593Sphk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33113593Sphk * SUCH DAMAGE. 34113593Sphk * 35113593Sphk * $FreeBSD: head/sys/geom/geom_bsd_enc.c 114548 2003-05-02 19:53:55Z phk $ 36113593Sphk * 37113593Sphk * Functions to encode and decode struct disklabel and struct partition into 38113593Sphk * a bytestream of little endianess and correct packing. 39113593Sphk * 40113593Sphk * NB! This file must be usable both in kernel and userland. 41113593Sphk * 42113593Sphk */ 43113593Sphk 44113593Sphk#include <sys/types.h> 45113593Sphk#include <sys/endian.h> 46113593Sphk#include <sys/disklabel.h> 47113593Sphk#ifdef _KERNEL 48113593Sphk#include <sys/systm.h> 49114548Sphk#else 50114548Sphk#include <string.h> 51113593Sphk#endif 52113593Sphk 53113593Sphkvoid 54113593Sphkbsd_partition_le_dec(u_char *ptr, struct partition *d) 55113593Sphk{ 56113593Sphk d->p_size = le32dec(ptr + 0); 57113593Sphk d->p_offset = le32dec(ptr + 4); 58113593Sphk d->p_fsize = le32dec(ptr + 8); 59113593Sphk d->p_fstype = ptr[12]; 60113593Sphk d->p_frag = ptr[13]; 61113593Sphk d->p_cpg = le16dec(ptr + 14); 62113593Sphk} 63113593Sphk 64113593Sphkvoid 65113593Sphkbsd_disklabel_le_dec(u_char *ptr, struct disklabel *d) 66113593Sphk{ 67113593Sphk int i; 68113593Sphk 69113593Sphk d->d_magic = le32dec(ptr + 0); 70113593Sphk d->d_type = le16dec(ptr + 4); 71113593Sphk d->d_subtype = le16dec(ptr + 6); 72113593Sphk bcopy(ptr + 8, d->d_typename, 16); 73113593Sphk bcopy(ptr + 24, d->d_packname, 16); 74113593Sphk d->d_secsize = le32dec(ptr + 40); 75113593Sphk d->d_nsectors = le32dec(ptr + 44); 76113593Sphk d->d_ntracks = le32dec(ptr + 48); 77113593Sphk d->d_ncylinders = le32dec(ptr + 52); 78113593Sphk d->d_secpercyl = le32dec(ptr + 56); 79113593Sphk d->d_secperunit = le32dec(ptr + 60); 80113593Sphk d->d_sparespertrack = le16dec(ptr + 64); 81113593Sphk d->d_sparespercyl = le16dec(ptr + 66); 82113593Sphk d->d_acylinders = le32dec(ptr + 68); 83113593Sphk d->d_rpm = le16dec(ptr + 72); 84113593Sphk d->d_interleave = le16dec(ptr + 74); 85113593Sphk d->d_trackskew = le16dec(ptr + 76); 86113593Sphk d->d_cylskew = le16dec(ptr + 78); 87113593Sphk d->d_headswitch = le32dec(ptr + 80); 88113593Sphk d->d_trkseek = le32dec(ptr + 84); 89113593Sphk d->d_flags = le32dec(ptr + 88); 90113593Sphk d->d_drivedata[0] = le32dec(ptr + 92); 91113593Sphk d->d_drivedata[1] = le32dec(ptr + 96); 92113593Sphk d->d_drivedata[2] = le32dec(ptr + 100); 93113593Sphk d->d_drivedata[3] = le32dec(ptr + 104); 94113593Sphk d->d_drivedata[4] = le32dec(ptr + 108); 95113593Sphk d->d_spare[0] = le32dec(ptr + 112); 96113593Sphk d->d_spare[1] = le32dec(ptr + 116); 97113593Sphk d->d_spare[2] = le32dec(ptr + 120); 98113593Sphk d->d_spare[3] = le32dec(ptr + 124); 99113593Sphk d->d_spare[4] = le32dec(ptr + 128); 100113593Sphk d->d_magic2 = le32dec(ptr + 132); 101113593Sphk d->d_checksum = le16dec(ptr + 136); 102113593Sphk d->d_npartitions = le16dec(ptr + 138); 103113593Sphk d->d_bbsize = le32dec(ptr + 140); 104113593Sphk d->d_sbsize = le32dec(ptr + 144); 105113593Sphk for (i = 0; i < MAXPARTITIONS; i++) 106113593Sphk bsd_partition_le_dec(ptr + 148 + 16 * i, &d->d_partitions[i]); 107113593Sphk} 108113593Sphk 109113593Sphkvoid 110113593Sphkbsd_partition_le_enc(u_char *ptr, struct partition *d) 111113593Sphk{ 112113593Sphk le32enc(ptr + 0, d->p_size); 113113593Sphk le32enc(ptr + 4, d->p_offset); 114113593Sphk le32enc(ptr + 8, d->p_fsize); 115113593Sphk ptr[12] = d->p_fstype; 116113593Sphk ptr[13] = d->p_frag; 117113593Sphk le16enc(ptr + 14, d->p_cpg); 118113593Sphk} 119113593Sphk 120113593Sphkvoid 121113593Sphkbsd_disklabel_le_enc(u_char *ptr, struct disklabel *d) 122113593Sphk{ 123113593Sphk int i; 124113593Sphk 125113593Sphk le32enc(ptr + 0, d->d_magic); 126113593Sphk le16enc(ptr + 4, d->d_type); 127113593Sphk le16enc(ptr + 6, d->d_subtype); 128113593Sphk bcopy(d->d_typename, ptr + 8, 16); 129113593Sphk bcopy(d->d_packname, ptr + 24, 16); 130113593Sphk le32enc(ptr + 40, d->d_secsize); 131113593Sphk le32enc(ptr + 44, d->d_nsectors); 132113593Sphk le32enc(ptr + 48, d->d_ntracks); 133113593Sphk le32enc(ptr + 52, d->d_ncylinders); 134113593Sphk le32enc(ptr + 56, d->d_secpercyl); 135113593Sphk le32enc(ptr + 60, d->d_secperunit); 136113593Sphk le16enc(ptr + 64, d->d_sparespertrack); 137113593Sphk le16enc(ptr + 66, d->d_sparespercyl); 138113593Sphk le32enc(ptr + 68, d->d_acylinders); 139113593Sphk le16enc(ptr + 72, d->d_rpm); 140113593Sphk le16enc(ptr + 74, d->d_interleave); 141113593Sphk le16enc(ptr + 76, d->d_trackskew); 142113593Sphk le16enc(ptr + 78, d->d_cylskew); 143113593Sphk le32enc(ptr + 80, d->d_headswitch); 144113593Sphk le32enc(ptr + 84, d->d_trkseek); 145113593Sphk le32enc(ptr + 88, d->d_flags); 146113593Sphk le32enc(ptr + 92, d->d_drivedata[0]); 147113593Sphk le32enc(ptr + 96, d->d_drivedata[1]); 148113593Sphk le32enc(ptr + 100, d->d_drivedata[2]); 149113593Sphk le32enc(ptr + 104, d->d_drivedata[3]); 150113593Sphk le32enc(ptr + 108, d->d_drivedata[4]); 151113593Sphk le32enc(ptr + 112, d->d_spare[0]); 152113593Sphk le32enc(ptr + 116, d->d_spare[1]); 153113593Sphk le32enc(ptr + 120, d->d_spare[2]); 154113593Sphk le32enc(ptr + 124, d->d_spare[3]); 155113593Sphk le32enc(ptr + 128, d->d_spare[4]); 156113593Sphk le32enc(ptr + 132, d->d_magic2); 157113593Sphk le16enc(ptr + 136, d->d_checksum); 158113593Sphk le16enc(ptr + 138, d->d_npartitions); 159113593Sphk le32enc(ptr + 140, d->d_bbsize); 160113593Sphk le32enc(ptr + 144, d->d_sbsize); 161113593Sphk for (i = 0; i < MAXPARTITIONS; i++) 162113593Sphk bsd_partition_le_enc(ptr + 148 + 16 * i, &d->d_partitions[i]); 163113593Sphk} 164