762ff43901
before multiplying the 32-bit integrals to avoid any possibility of truncation before widening. Not a likely scenario to begin with...
136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
/*-
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* Copyright (c) 2014 Juniper Networks, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/disklabel.h>
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "image.h"
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#include "mkimg.h"
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#include "scheme.h"
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#ifndef FS_NANDFS
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#define FS_NANDFS 30
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#endif
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static struct mkimg_alias bsd_aliases[] = {
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{ ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(FS_NANDFS) },
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{ ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(FS_SWAP) },
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{ ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(FS_BSDFFS) },
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{ ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(FS_VINUM) },
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{ ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(FS_ZFS) },
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{ ALIAS_NONE, 0 }
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};
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static u_int
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bsd_metadata(u_int where)
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{
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u_int secs;
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secs = BBSIZE / secsz;
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return ((where == SCHEME_META_IMG_START) ? secs : 0);
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}
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static int
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bsd_write(lba_t imgsz, void *bootcode)
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{
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u_char *buf, *p;
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struct disklabel *d;
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struct partition *dp;
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struct part *part;
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int error, n;
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uint16_t checksum;
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buf = malloc(BBSIZE);
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if (buf == NULL)
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return (ENOMEM);
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if (bootcode != NULL) {
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memcpy(buf, bootcode, BBSIZE);
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memset(buf + secsz, 0, secsz);
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} else
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memset(buf, 0, BBSIZE);
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imgsz = (lba_t)ncyls * nheads * nsecs;
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error = image_set_size(imgsz);
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if (error) {
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free(buf);
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return (error);
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}
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d = (void *)(buf + secsz);
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le32enc(&d->d_magic, DISKMAGIC);
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le32enc(&d->d_secsize, secsz);
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le32enc(&d->d_nsectors, nsecs);
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le32enc(&d->d_ntracks, nheads);
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le32enc(&d->d_ncylinders, ncyls);
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le32enc(&d->d_secpercyl, nsecs * nheads);
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le32enc(&d->d_secperunit, imgsz);
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le16enc(&d->d_rpm, 3600);
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le32enc(&d->d_magic2, DISKMAGIC);
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le16enc(&d->d_npartitions, (8 > nparts + 1) ? 8 : nparts + 1);
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le32enc(&d->d_bbsize, BBSIZE);
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dp = &d->d_partitions[RAW_PART];
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le32enc(&dp->p_size, imgsz);
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STAILQ_FOREACH(part, &partlist, link) {
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n = part->index + ((part->index >= RAW_PART) ? 1 : 0);
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dp = &d->d_partitions[n];
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le32enc(&dp->p_size, part->size);
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le32enc(&dp->p_offset, part->block);
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dp->p_fstype = ALIAS_TYPE2INT(part->type);
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}
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dp = &d->d_partitions[nparts + 1];
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checksum = 0;
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for (p = buf; p < (u_char *)dp; p += 2)
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checksum ^= le16dec(p);
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le16enc(&d->d_checksum, checksum);
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error = image_write(0, buf, BBSIZE / secsz);
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free(buf);
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return (error);
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}
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static struct mkimg_scheme bsd_scheme = {
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.name = "bsd",
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.description = "BSD disk label",
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.aliases = bsd_aliases,
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.metadata = bsd_metadata,
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.write = bsd_write,
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.nparts = 19,
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.bootcode = BBSIZE,
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.maxsecsz = 512
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};
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SCHEME_DEFINE(bsd_scheme);
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