269 lines
6.5 KiB
C
269 lines
6.5 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 1.11 2014/09/30 17:59:59 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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static off_t alignment, sectors, size;
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static unsigned int entry;
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const char resizemsg[] = "resize -i index [-a alignment] [-s size] device ...";
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__dead static void
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usage_resize(void)
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{
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fprintf(stderr,
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"usage: %s %s\n", getprogname(), resizemsg);
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exit(1);
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}
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static void
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resize(int fd)
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{
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map_t *gpt, *tpg;
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map_t *tbl, *lbt;
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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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gpt = map_find(MAP_TYPE_PRI_GPT_HDR);
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ent = NULL;
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if (gpt == NULL) {
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warnx("%s: error: no primary GPT header; run create or recover",
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device_name);
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return;
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}
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tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
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if (tpg == NULL) {
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warnx("%s: error: no secondary GPT header; run recover",
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device_name);
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return;
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}
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tbl = map_find(MAP_TYPE_PRI_GPT_TBL);
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lbt = map_find(MAP_TYPE_SEC_GPT_TBL);
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if (tbl == NULL || lbt == NULL) {
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warnx("%s: error: run recover -- trust me", device_name);
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return;
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}
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hdr = gpt->map_data;
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if (entry > le32toh(hdr->hdr_entries)) {
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warnx("%s: error: index %u out of range (%u max)", device_name,
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entry, le32toh(hdr->hdr_entries));
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return;
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}
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i = entry - 1;
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ent = (void*)((char*)tbl->map_data + i *
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le32toh(hdr->hdr_entsz));
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if (gpt_uuid_is_nil(ent->ent_type)) {
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warnx("%s: error: entry at index %u is unused",
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device_name, entry);
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return;
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}
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alignsecs = alignment / secsz;
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for (map = map_first(); 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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warnx("%s: error: could not find map entry corresponding "
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"to index", device_name);
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return;
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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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warnx("%s: partition does not need resizing",
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device_name);
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return;
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}
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newsize = map_resize(map, sectors, alignsecs);
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if (newsize == 0 && alignment > 0) {
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warnx("%s: could not resize partition with alignment "
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"constraint", device_name);
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return;
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} else if (newsize == 0) {
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warnx("%s: could not resize partition", device_name);
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return;
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}
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ent->ent_lba_end = htole64(map->map_start + newsize - 1LL);
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hdr->hdr_crc_table = htole32(crc32(tbl->map_data,
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le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
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hdr->hdr_crc_self = 0;
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hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
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gpt_write(fd, gpt);
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gpt_write(fd, tbl);
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hdr = tpg->map_data;
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ent = (void*)((char*)lbt->map_data + i * le32toh(hdr->hdr_entsz));
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ent->ent_lba_end = htole64(map->map_start + newsize - 1LL);
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hdr->hdr_crc_table = htole32(crc32(lbt->map_data,
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le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
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hdr->hdr_crc_self = 0;
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hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
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gpt_write(fd, lbt);
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gpt_write(fd, tpg);
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printf("Partition %d resized, use:\n", entry);
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printf("\tdkctl %s addwedge <wedgename> %" PRIu64 " %" PRIu64
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" <type>\n", device_arg, map->map_start, newsize);
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printf("to create a wedge for it\n");
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}
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int
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cmd_resize(int argc, char *argv[])
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{
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char *p;
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int ch, fd;
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int64_t human_num;
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while ((ch = getopt(argc, argv, "a:i:s:")) != -1) {
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switch(ch) {
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case 'a':
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if (alignment > 0)
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usage_resize();
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if (dehumanize_number(optarg, &human_num) < 0)
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usage_resize();
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alignment = human_num;
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if (alignment < 1)
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usage_resize();
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break;
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case 'i':
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if (entry > 0)
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usage_resize();
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entry = strtoul(optarg, &p, 10);
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if (*p != 0 || entry < 1)
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usage_resize();
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break;
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case 's':
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if (sectors > 0 || size > 0)
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usage_resize();
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sectors = strtoll(optarg, &p, 10);
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if (sectors < 1)
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usage_resize();
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if (*p == '\0')
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break;
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if (*p == 's' || *p == 'S') {
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if (*(p + 1) == '\0')
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break;
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else
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usage_resize();
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}
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if (*p == 'b' || *p == 'B') {
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if (*(p + 1) == '\0') {
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size = sectors;
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sectors = 0;
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break;
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} else
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usage_resize();
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}
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if (dehumanize_number(optarg, &human_num) < 0)
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usage_resize();
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size = human_num;
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sectors = 0;
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break;
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default:
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usage_resize();
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}
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}
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if (argc == optind)
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usage_resize();
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if (entry == 0)
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usage_resize();
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while (optind < argc) {
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fd = gpt_open(argv[optind++]);
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if (fd == -1) {
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warn("unable to open device '%s'", device_name);
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continue;
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}
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if (alignment % secsz != 0) {
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warnx("Alignment must be a multiple of sector size;");
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warnx("the sector size for %s is %d bytes.",
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device_name, secsz);
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continue;
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}
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if (size % secsz != 0) {
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warnx("Size in bytes must be a multiple of sector "
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"size;");
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warnx("the sector size for %s is %d bytes.",
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device_name, secsz);
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continue;
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}
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if (size > 0)
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sectors = size / secsz;
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resize(fd);
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gpt_close(fd);
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}
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return 0;
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}
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