150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/*-
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* Copyright (c) 2002 Marcel Moolenaar
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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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*
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#ifdef __FBSDID
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__FBSDID("$FreeBSD: src/sbin/gpt/add.c,v 1.14 2006/06/22 22:05:28 marcel Exp $");
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#endif
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#ifdef __RCSID
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__RCSID("$NetBSD: resize.c,v 1.22 2015/12/04 16:54:28 christos Exp $");
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#endif
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#include <sys/types.h>
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#include <err.h>
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#include <stddef.h>
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#include <stdio.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 "map.h"
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#include "gpt.h"
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#include "gpt_private.h"
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static int cmd_resize(gpt_t, int, char *[]);
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static const char *resizehelp[] = {
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"-i index [-a alignment] [-s size]",
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};
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struct gpt_cmd c_resize = {
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"resize",
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cmd_resize,
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resizehelp, __arraycount(resizehelp),
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0,
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};
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#define usage() gpt_usage(NULL, &c_resize)
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static int
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resize(gpt_t gpt, u_int entry, off_t alignment, off_t sectors, off_t size)
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{
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map_t map;
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struct gpt_hdr *hdr;
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struct gpt_ent *ent;
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unsigned int i;
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off_t alignsecs, newsize;
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uint64_t end;
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if ((hdr = gpt_hdr(gpt)) == NULL)
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return -1;
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i = entry - 1;
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ent = gpt_ent_primary(gpt, i);
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if (gpt_uuid_is_nil(ent->ent_type)) {
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gpt_warnx(gpt, "Entry at index %u is unused", entry);
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return -1;
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}
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alignsecs = alignment / gpt->secsz;
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for (map = map_first(gpt); map != NULL; map = map->map_next) {
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if (entry == map->map_index)
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break;
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}
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if (map == NULL) {
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gpt_warnx(gpt, "Could not find map entry corresponding "
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"to index");
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return -1;
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}
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if (sectors > 0 && sectors == map->map_size)
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if (alignment == 0 ||
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(alignment > 0 && sectors % alignsecs == 0)) {
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/* nothing to do */
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gpt_warnx(gpt, "partition does not need resizing");
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return 0;
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}
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newsize = map_resize(gpt, map, sectors, alignsecs);
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if (newsize == -1)
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return -1;
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end = htole64((uint64_t)(map->map_start + newsize - 1LL));
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ent->ent_lba_end = end;
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if (gpt_write_primary(gpt) == -1)
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return -1;
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ent = gpt_ent(gpt->gpt, gpt->lbt, i);
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ent->ent_lba_end = end;
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if (gpt_write_backup(gpt) == -1)
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return -1;
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gpt_msg(gpt, "Partition %d resized: %" PRIu64 " %" PRIu64, entry,
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map->map_start, newsize);
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return 0;
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}
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static int
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cmd_resize(gpt_t gpt, int argc, char *argv[])
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{
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int ch;
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off_t alignment = 0, sectors, size = 0;
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unsigned int entry = 0;
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while ((ch = getopt(argc, argv, GPT_AIS)) != -1) {
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if (gpt_add_ais(gpt, &alignment, &entry, &size, ch) == -1)
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return usage();
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}
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if (argc != optind)
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return usage();
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if ((sectors = gpt_check_ais(gpt, alignment, entry, size)) == -1)
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return -1;
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return resize(gpt, entry, alignment, sectors, size);
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}
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