/*- * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #ifdef _KERNEL #include #else #include #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); }