153 lines
3.5 KiB
C
153 lines
3.5 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 <err.h>
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#include <errno.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include "mkimg.h"
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#include "scheme.h"
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static struct mkimg_scheme *scheme;
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static u_int secsz = 512;
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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_check_part(struct part *p)
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{
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struct mkimg_alias *alias, *iter;
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warnx("part(%s): index=%u, type=`%s', offset=%ju, size=%ju",
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scheme->name, p->index, p->alias, (uintmax_t)p->offset,
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(uintmax_t)p->size);
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/* Check the partition type alias */
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alias = NULL;
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iter = scheme->aliases;
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while (iter->name != NULL) {
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if (strcasecmp(p->alias, iter->name) == 0) {
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alias = iter;
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break;
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}
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iter++;
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}
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if (alias == NULL)
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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 (EOPNOTSUPP);
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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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uint64_t
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scheme_round(uint64_t sz)
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{
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sz = (sz + secsz - 1) & ~(secsz - 1);
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return (sz);
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}
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off_t
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scheme_first_offset(u_int parts)
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{
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u_int secs;
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secs = scheme->metadata(SCHEME_META_IMG_START, parts, secsz) +
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scheme->metadata(SCHEME_META_PART_BEFORE, 0, secsz);
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return (secs * secsz);
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}
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off_t
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scheme_next_offset(off_t off, uint64_t sz)
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{
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u_int secs;
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secs = scheme->metadata(SCHEME_META_PART_AFTER, 0, secsz) +
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scheme->metadata(SCHEME_META_PART_BEFORE, 0, secsz);
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sz += (secs * secsz);
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return (off + sz);
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}
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int
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scheme_write(int fd, off_t off)
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{
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u_int secs;
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int error;
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/* Fixup offset: it has an extra metadata before the partition */
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secs = scheme->metadata(SCHEME_META_PART_BEFORE, 0, secsz);
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off -= (secs * secsz);
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secs = scheme->metadata(SCHEME_META_IMG_END, nparts, secsz);
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off += (secs * secsz);
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if (ftruncate(fd, off) == -1)
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return (errno);
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error = scheme->write(fd, off, nparts, secsz);
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return (error);
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}
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