189 lines
4.2 KiB
C
189 lines
4.2 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 <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.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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{ "ntfs", ALIAS_NTFS },
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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 == NULL || 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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assert(scheme != NULL);
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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 == NULL) ? 0 : 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 == NULL) ? INT_MAX+1U : 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 == NULL) ? start : 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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return ((scheme == NULL) ? 0 : scheme->write(end, bootcode));
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}
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