freebsd-dev/usr.bin/mkimg/scheme.c

191 lines
4.2 KiB
C

/*-
* Copyright (c) 2013,2014 Juniper Networks, Inc.
* All rights reserved.
*
* 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.
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/linker_set.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "image.h"
#include "mkimg.h"
#include "scheme.h"
static struct {
const char *name;
enum alias alias;
} scheme_alias[] = {
{ "ebr", ALIAS_EBR },
{ "efi", ALIAS_EFI },
{ "fat16b", ALIAS_FAT16B },
{ "fat32", ALIAS_FAT32 },
{ "freebsd", ALIAS_FREEBSD },
{ "freebsd-boot", ALIAS_FREEBSD_BOOT },
{ "freebsd-nandfs", ALIAS_FREEBSD_NANDFS },
{ "freebsd-swap", ALIAS_FREEBSD_SWAP },
{ "freebsd-ufs", ALIAS_FREEBSD_UFS },
{ "freebsd-vinum", ALIAS_FREEBSD_VINUM },
{ "freebsd-zfs", ALIAS_FREEBSD_ZFS },
{ "mbr", ALIAS_MBR },
{ "ntfs", ALIAS_NTFS },
{ "prepboot", ALIAS_PPCBOOT },
{ NULL, ALIAS_NONE } /* Keep last! */
};
static struct mkimg_scheme *scheme;
static void *bootcode;
static enum alias
scheme_parse_alias(const char *name)
{
u_int idx;
idx = 0;
while (scheme_alias[idx].name != NULL) {
if (strcasecmp(scheme_alias[idx].name, name) == 0)
return (scheme_alias[idx].alias);
idx++;
}
return (ALIAS_NONE);
}
int
scheme_select(const char *spec)
{
struct mkimg_scheme *s, **iter;
SET_FOREACH(iter, schemes) {
s = *iter;
if (strcasecmp(spec, s->name) == 0) {
scheme = s;
return (0);
}
}
return (EINVAL);
}
struct mkimg_scheme *
scheme_selected(void)
{
return (scheme);
}
int
scheme_bootcode(int fd)
{
struct stat sb;
if (scheme == NULL || scheme->bootcode == 0)
return (ENXIO);
if (fstat(fd, &sb) == -1)
return (errno);
if (sb.st_size > scheme->bootcode)
return (EFBIG);
bootcode = malloc(scheme->bootcode);
if (bootcode == NULL)
return (ENOMEM);
memset(bootcode, 0, scheme->bootcode);
if (read(fd, bootcode, sb.st_size) != sb.st_size) {
free(bootcode);
bootcode = NULL;
return (errno);
}
return (0);
}
int
scheme_check_part(struct part *p)
{
struct mkimg_alias *iter;
enum alias alias;
assert(scheme != NULL);
/* Check the partition type alias */
alias = scheme_parse_alias(p->alias);
if (alias == ALIAS_NONE)
return (EINVAL);
iter = scheme->aliases;
while (iter->alias != ALIAS_NONE) {
if (alias == iter->alias)
break;
iter++;
}
if (iter->alias == ALIAS_NONE)
return (EINVAL);
p->type = iter->type;
/* Validate the optional label. */
if (p->label != NULL) {
if (strlen(p->label) > scheme->labellen)
return (EINVAL);
}
return (0);
}
u_int
scheme_max_parts(void)
{
return ((scheme == NULL) ? 0 : scheme->nparts);
}
u_int
scheme_max_secsz(void)
{
return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz);
}
lba_t
scheme_metadata(u_int where, lba_t start)
{
return ((scheme == NULL) ? start : scheme->metadata(where, start));
}
int
scheme_write(lba_t end)
{
return ((scheme == NULL) ? 0 : scheme->write(end, bootcode));
}