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53fcdb2d1a
-T (track size) or -H (number of heads) is given: o scheme_metadata() always rounded to the block size. This is not always valid (e.g. vtoc8 that must have partitions start at cylinder boundaries). o The bsd and vtoc8 schemes "resized" the image to make it match the geometry, but since the geometry is an approximation and the size of the image computed from cylinders * heads * sectors is always smaller than the original image size, the partition information ran out of bounds. The fix is to have scheme_metadata() simply pass it's arguments to the per-scheme metadata callback, so that schemes not only know where the metadata is to go, but also what the current block address is. It's now up to the per-scheme callback to reserve room for metadata and to make sure alignment and rounding is applied. The BSD scheme now has the most elaborate alignment and rounding. Just to make the point: partitions are aligned on block boundaries, but the image is rounded to the next cyclinder boundary. vtoc8 now properly has all partitions aligned (and rounded) to the cyclinder boundary. Obtained from: Juniper Networks, Inc. MFC after: 3 days
187 lines
4.0 KiB
C
187 lines
4.0 KiB
C
/*-
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* Copyright (c) 2013,2014 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/linker_set.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <stdint.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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static struct {
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const char *name;
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enum alias alias;
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} scheme_alias[] = {
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{ "ebr", ALIAS_EBR },
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{ "efi", ALIAS_EFI },
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{ "fat32", ALIAS_FAT32 },
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{ "freebsd", ALIAS_FREEBSD },
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{ "freebsd-boot", ALIAS_FREEBSD_BOOT },
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{ "freebsd-nandfs", ALIAS_FREEBSD_NANDFS },
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{ "freebsd-swap", ALIAS_FREEBSD_SWAP },
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{ "freebsd-ufs", ALIAS_FREEBSD_UFS },
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{ "freebsd-vinum", ALIAS_FREEBSD_VINUM },
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{ "freebsd-zfs", ALIAS_FREEBSD_ZFS },
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{ "mbr", ALIAS_MBR },
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{ NULL, ALIAS_NONE } /* Keep last! */
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};
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static struct mkimg_scheme *scheme;
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static void *bootcode;
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static enum alias
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scheme_parse_alias(const char *name)
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{
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u_int idx;
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idx = 0;
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while (scheme_alias[idx].name != NULL) {
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if (strcasecmp(scheme_alias[idx].name, name) == 0)
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return (scheme_alias[idx].alias);
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idx++;
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}
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return (ALIAS_NONE);
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}
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int
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scheme_select(const char *spec)
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{
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struct mkimg_scheme *s, **iter;
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SET_FOREACH(iter, schemes) {
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s = *iter;
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if (strcasecmp(spec, s->name) == 0) {
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scheme = s;
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return (0);
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}
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}
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return (EINVAL);
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}
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struct mkimg_scheme *
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scheme_selected(void)
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{
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return (scheme);
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}
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int
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scheme_bootcode(int fd)
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{
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struct stat sb;
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if (scheme->bootcode == 0)
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return (ENXIO);
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if (fstat(fd, &sb) == -1)
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return (errno);
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if (sb.st_size > scheme->bootcode)
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return (EFBIG);
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bootcode = malloc(scheme->bootcode);
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if (bootcode == NULL)
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return (ENOMEM);
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memset(bootcode, 0, scheme->bootcode);
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if (read(fd, bootcode, sb.st_size) != sb.st_size) {
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free(bootcode);
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bootcode = NULL;
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return (errno);
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}
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return (0);
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}
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int
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scheme_check_part(struct part *p)
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{
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struct mkimg_alias *iter;
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enum alias alias;
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/* Check the partition type alias */
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alias = scheme_parse_alias(p->alias);
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if (alias == ALIAS_NONE)
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return (EINVAL);
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iter = scheme->aliases;
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while (iter->alias != ALIAS_NONE) {
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if (alias == iter->alias)
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break;
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iter++;
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}
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if (iter->alias == ALIAS_NONE)
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return (EINVAL);
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p->type = iter->type;
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/* Validate the optional label. */
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if (p->label != NULL) {
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if (strlen(p->label) > scheme->labellen)
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return (EINVAL);
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}
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return (0);
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}
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u_int
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scheme_max_parts(void)
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{
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return (scheme->nparts);
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}
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u_int
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scheme_max_secsz(void)
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{
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return (scheme->maxsecsz);
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}
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lba_t
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scheme_metadata(u_int where, lba_t start)
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{
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return (scheme->metadata(where, start));
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}
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int
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scheme_write(lba_t end)
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{
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int error;
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end = image_get_size();
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error = scheme->write(end, bootcode);
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return (error);
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}
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