291 lines
7.2 KiB
C
291 lines
7.2 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: resizedisk.c,v 1.7 2015/11/29 00:14:46 christos Exp $");
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#endif
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#include <sys/bootblock.h>
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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 uint64_t sector, size;
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const char resizediskmsg[] = "resizedisk [-s size] device ...";
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__dead static void
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usage_resizedisk(void)
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{
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fprintf(stderr,
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"usage: %s %s\n", getprogname(), resizediskmsg);
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exit(1);
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}
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/*
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* relocate the secondary GPT based on the following criteria:
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* - size not specified
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* - disk has not changed size, do nothing
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* - disk has grown, relocate secondary
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* - disk has shrunk, create new secondary
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* - size specified
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* - size is larger then disk or same as current location, do nothing
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* - relocate or create new secondary
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* - when shrinking, verify that table fits
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*/
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static void
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resizedisk(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 *mbrmap;
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struct gpt_hdr *hdr;
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struct gpt_ent *ent;
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struct mbr *mbr;
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uint64_t last, oldloc, newloc, lastdata, gpt_size;
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int i;
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last = mediasz / secsz - 1;
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lastdata = 0;
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newloc = 0;
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if (sector > last) {
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warnx("%s: specified size is larger then the disk",
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device_name);
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return;
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}
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mbrmap = map_find(MAP_TYPE_PMBR);
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if (mbrmap == NULL || mbrmap->map_start != 0) {
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warnx("%s: error: no valid Protective MBR found", device_name);
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return;
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}
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mbr = mbrmap->map_data;
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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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hdr = gpt->map_data;
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oldloc = le64toh(hdr->hdr_lba_alt);
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tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
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if (tpg == NULL)
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if (gpt_gpt(fd, oldloc, 1))
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tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
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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) {
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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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gpt_size = tbl->map_size;
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if (sector == oldloc) {
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warnx("%s: device is already the specified size", device_name);
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return;
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}
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if (sector == 0 && last == oldloc) {
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warnx("%s: device hasn't changed size", device_name);
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return;
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}
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for (ent = tbl->map_data; ent <
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(struct gpt_ent *)((char *)tbl->map_data +
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le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)); ent++) {
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if (!gpt_uuid_is_nil(ent->ent_type) &&
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(le64toh(ent->ent_lba_end) > lastdata)) {
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lastdata = le64toh(ent->ent_lba_end);
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}
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}
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if (sector - gpt_size <= lastdata) {
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warnx("%s: not enough space at %" PRIu64
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" for secondary GPT table", device_name, sector);
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return;
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}
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if (last - gpt_size <= lastdata) {
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warnx("%s: not enough space for new secondary GPT table",
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device_name);
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return;
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}
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if (sector > oldloc)
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newloc = sector;
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if (sector > 0 && sector < oldloc && last >= oldloc)
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newloc = sector;
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if (sector == 0 && last > oldloc)
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newloc = last;
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if (newloc > 0) {
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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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if (lbt == NULL) {
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warnx("%s: error: run recover -- trust me",
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device_name);
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return;
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}
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tpg->map_start = newloc;
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lbt->map_start = newloc - gpt_size;
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} else {
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if (sector > 0)
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newloc = sector;
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else
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newloc = last;
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tpg = map_add(newloc, 1LL, MAP_TYPE_SEC_GPT_HDR,
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calloc(1, secsz));
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lbt = map_add(newloc - gpt_size, gpt_size, MAP_TYPE_SEC_GPT_TBL,
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tbl->map_data);
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memcpy(tpg->map_data, gpt->map_data, secsz);
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}
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hdr = gpt->map_data;
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hdr->hdr_lba_alt = tpg->map_start;
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hdr->hdr_crc_self = 0;
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hdr->hdr_lba_end = htole64(lbt->map_start - 1);
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hdr->hdr_crc_self =
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htole32(crc32(gpt->map_data, GPT_HDR_SIZE));
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gpt_write(fd, gpt);
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hdr = tpg->map_data;
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hdr->hdr_lba_self = htole64(tpg->map_start);
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hdr->hdr_lba_alt = htole64(gpt->map_start);
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hdr->hdr_lba_end = htole64(lbt->map_start - 1);
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hdr->hdr_lba_table = htole64(lbt->map_start);
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hdr->hdr_crc_self = 0;
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hdr->hdr_crc_self =
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htole32(crc32(tpg->map_data, GPT_HDR_SIZE));
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gpt_write(fd, lbt);
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gpt_write(fd, tpg);
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for (i = 0; i < 4; i++)
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if (mbr->mbr_part[0].part_typ == MBR_PTYPE_PMBR)
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break;
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if (i == 4) {
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warnx("%s: no valid PMBR partition found", device_name);
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return;
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}
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if (last > 0xffffffff) {
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mbr->mbr_part[0].part_size_lo = htole16(0xffff);
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mbr->mbr_part[0].part_size_hi = htole16(0xffff);
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} else {
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mbr->mbr_part[0].part_size_lo = htole16(last);
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mbr->mbr_part[0].part_size_hi = htole16(last >> 16);
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}
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gpt_write(fd, mbrmap);
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return;
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}
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int
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cmd_resizedisk(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, "s:")) != -1) {
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switch(ch) {
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case 's':
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if (sector > 0 || size > 0)
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usage_resizedisk();
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sector = strtoll(optarg, &p, 10);
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if (sector < 1)
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usage_resizedisk();
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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_resizedisk();
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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 = sector;
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sector = 0;
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break;
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} else
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usage_resizedisk();
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}
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if (dehumanize_number(optarg, &human_num) < 0)
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usage_resizedisk();
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size = human_num;
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sector = 0;
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break;
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default:
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usage_resizedisk();
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}
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}
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if (argc == optind)
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usage_resizedisk();
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while (optind < argc) {
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fd = gpt_open(argv[optind++], 0);
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if (fd == -1)
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continue;
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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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sector = size / secsz - 1;
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resizedisk(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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