Not only is the header unportable, the encoding/decoding functions are as well. Instead, duplicate the handful of small inlines we need into a private header called endian.h. Aside: an alternative approach is to move the encoding/decoding functions to a separate system header. While the header is still nonportable, such an approach would make it possible to re-use the definitions by playing games with include paths. This may be the preferred approach if more (build) utilities need this. This change does not preclude that. In fact, it makes it easier.
140 lines
3.9 KiB
C
140 lines
3.9 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/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 "endian.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 lba_t
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bsd_metadata(u_int where, lba_t blk)
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{
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if (where == SCHEME_META_IMG_START)
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blk += BBSIZE / secsz;
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else if (where == SCHEME_META_IMG_END)
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blk = round_cylinder(blk);
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else
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blk = round_block(blk);
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return (blk);
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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 bsdparts, 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, sizeof(struct disklabel));
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} else
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memset(buf, 0, BBSIZE);
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bsdparts = nparts + 1; /* Account for c partition */
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if (bsdparts < MAXPARTITIONS)
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bsdparts = MAXPARTITIONS;
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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, bsdparts);
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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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le32enc(&dp->p_fsize, 0);
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dp->p_fstype = ALIAS_TYPE2INT(part->type);
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dp->p_frag = 0;
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le16enc(&dp->p_cpg, 0);
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}
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dp = &d->d_partitions[bsdparts];
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checksum = 0;
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for (p = (void *)d; 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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