269 lines
7.1 KiB
C
269 lines
7.1 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 1.20 2022/11/22 00:25:52 mlelstv 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 <stdbool.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_resizedisk(gpt_t, int, char *[]);
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static const char *resizediskhelp[] = {
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"[-s size] [-q]",
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};
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struct gpt_cmd c_resizedisk = {
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"resizedisk",
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cmd_resizedisk,
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resizediskhelp, __arraycount(resizediskhelp),
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GPT_OPTGPT,
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};
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#define usage() gpt_usage(NULL, &c_resizedisk)
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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 int
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resizedisk(gpt_t gpt, off_t sector, off_t size, bool quiet)
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{
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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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off_t last, oldloc, newloc, lastdata, gpt_size;
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int i;
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last = gpt->mediasz / gpt->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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gpt_warnx(gpt, "specified number of sectors %jd"
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" is larger then the disk %jd", (uintmax_t)sector,
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(uintmax_t)last);
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return -1;
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}
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mbrmap = map_find(gpt, MAP_TYPE_PMBR);
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if (mbrmap == NULL || mbrmap->map_start != 0) {
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gpt_warnx(gpt, "No valid PMBR found");
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return -1;
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}
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mbr = mbrmap->map_data;
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gpt->gpt = map_find(gpt, MAP_TYPE_PRI_GPT_HDR);
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if (gpt == NULL) {
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gpt_warnx(gpt, "No primary GPT header; run create or recover");
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return -1;
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}
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gpt->tbl = map_find(gpt, MAP_TYPE_PRI_GPT_TBL);
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if (gpt->tbl == NULL) {
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gpt_warnx(gpt, "No primary GPT table; Run recover");
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return -1;
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}
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hdr = gpt->gpt->map_data;
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oldloc = (off_t)le64toh((uint64_t)hdr->hdr_lba_alt);
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gpt->tpg = map_find(gpt, MAP_TYPE_SEC_GPT_HDR);
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gpt->lbt = map_find(gpt, MAP_TYPE_SEC_GPT_TBL);
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if (gpt->tpg == NULL || gpt->lbt == NULL)
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gpt_warnx(gpt, "No secondary GPT table");
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gpt_size = gpt->tbl->map_size;
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if (sector == oldloc) {
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if (!quiet)
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gpt_warnx(gpt, "Device is already the specified size");
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return 0;
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}
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if (sector == 0 && last == oldloc) {
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if (!quiet)
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gpt_warnx(gpt, "Device hasn't changed size");
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if (gpt->tpg != NULL && gpt->lbt != NULL)
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return 0;
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}
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for (ent = gpt->tbl->map_data; ent <
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(struct gpt_ent *)((char *)gpt->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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((off_t)le64toh(ent->ent_lba_end) > lastdata)) {
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lastdata = (off_t)le64toh((uint64_t)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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gpt_warnx(gpt, "Not enough space at %" PRIu64
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" for secondary GPT table", sector);
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return -1;
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}
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if (last - gpt_size <= lastdata) {
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gpt_warnx(gpt, "Not enough space for new secondary GPT table");
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return -1;
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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 && gpt->tpg != NULL && gpt->lbt != NULL) {
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if (!quiet)
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gpt_msg(gpt, "Moving secondary GPT header");
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gpt->tpg->map_start = newloc;
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gpt->lbt->map_start = newloc - gpt_size;
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} else {
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if (!quiet)
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gpt_msg(gpt, "Creating new secondary GPT header");
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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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if (gpt_add_hdr(gpt, MAP_TYPE_SEC_GPT_HDR, newloc) == -1)
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return -1;
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gpt->lbt = map_add(gpt, newloc - gpt_size, gpt_size,
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MAP_TYPE_SEC_GPT_TBL, gpt->tbl->map_data, 0);
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if (gpt->lbt == NULL) {
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gpt_warn(gpt, "Error adding secondary GPT table");
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return -1;
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}
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memcpy(gpt->tpg->map_data, gpt->gpt->map_data, gpt->secsz);
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}
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hdr = gpt->gpt->map_data;
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hdr->hdr_lba_alt = htole64((uint64_t)gpt->tpg->map_start);
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hdr->hdr_crc_self = 0;
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hdr->hdr_lba_end = htole64((uint64_t)(gpt->lbt->map_start - 1));
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hdr->hdr_crc_self =
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htole32(crc32(gpt->gpt->map_data, GPT_HDR_SIZE));
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gpt_write(gpt, gpt->gpt);
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hdr = gpt->tpg->map_data;
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hdr->hdr_lba_self = htole64((uint64_t)gpt->tpg->map_start);
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hdr->hdr_lba_alt = htole64((uint64_t)gpt->gpt->map_start);
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hdr->hdr_lba_end = htole64((uint64_t)(gpt->lbt->map_start - 1));
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hdr->hdr_lba_table = htole64((uint64_t)gpt->lbt->map_start);
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if (gpt_write_backup(gpt) == -1)
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return -1;
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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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gpt_warnx(gpt, "No valid PMBR partition found");
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return -1;
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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((uint16_t)last);
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mbr->mbr_part[0].part_size_hi = htole16((uint16_t)(last >> 16));
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}
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if (gpt_write(gpt, mbrmap) == -1) {
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gpt_warnx(gpt, "Error writing PMBR");
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return -1;
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}
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return 0;
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}
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static int
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cmd_resizedisk(gpt_t gpt, int argc, char *argv[])
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{
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int ch;
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off_t sector, size = gpt->mediasz;
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bool quiet = false;
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while ((ch = getopt(argc, argv, "s:q")) != -1) {
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switch(ch) {
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case 's':
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if (gpt_add_ais(gpt, NULL, NULL, &size, ch) == -1)
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return -1;
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break;
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case 'q':
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quiet = true;
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break;
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default:
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return usage();
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}
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}
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if (argc != optind)
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return usage();
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if ((sector = gpt_check_ais(gpt, 0, (u_int)~0, size)) == -1)
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return -1;
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if (--sector == 0) {
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gpt_warnx(gpt, "New size %ju too small", (uintmax_t)size);
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return -1;
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}
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return resizedisk(gpt, sector, size, quiet);
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}
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