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494646dbad
In several places the existing code assumes LBA, but was improperly converted to use byte offsets, so multiply by the sector size to correct it and maintain the same interface between MTD & GPT. Also, since we will need to cgpt create on /dev/fts, which isn't a stat()able device, allow providing the disk size on the commandline. BRANCH=none BUG=chromium:221745 TEST=make runtests; cgpt create -s 12345 on MTD image Change-Id: Icc89a4505aba9a3dfc39b176a372f6e12d106aed Reviewed-on: https://gerrit.chromium.org/gerrit/62675 Reviewed-by: Bill Richardson <wfrichar@chromium.org> Tested-by: Albert Chaulk <achaulk@chromium.org> Commit-Queue: Albert Chaulk <achaulk@chromium.org>
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <string.h>
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#include "cgpt.h"
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#include "cgptlib_internal.h"
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#include "vboot_host.h"
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int GptCreate(struct drive *drive, CgptCreateParams *params) {
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// Erase the data
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memset(drive->gpt.primary_header, 0,
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drive->gpt.sector_bytes * GPT_HEADER_SECTOR);
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memset(drive->gpt.secondary_header, 0,
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drive->gpt.sector_bytes * GPT_HEADER_SECTOR);
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memset(drive->gpt.primary_entries, 0,
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drive->gpt.sector_bytes * GPT_ENTRIES_SECTORS);
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memset(drive->gpt.secondary_entries, 0,
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drive->gpt.sector_bytes * GPT_ENTRIES_SECTORS);
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drive->gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
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GPT_MODIFIED_HEADER2 | GPT_MODIFIED_ENTRIES2);
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// Initialize a blank set
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if (!params->zap) {
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GptHeader *h = (GptHeader *)drive->gpt.primary_header;
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memcpy(h->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
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h->revision = GPT_HEADER_REVISION;
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h->size = sizeof(GptHeader);
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h->my_lba = 1;
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h->alternate_lba = drive->gpt.drive_sectors - 1;
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h->first_usable_lba = 1 + 1 + GPT_ENTRIES_SECTORS;
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h->last_usable_lba = drive->gpt.drive_sectors - 1 - GPT_ENTRIES_SECTORS - 1;
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if (!uuid_generator) {
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Error("Unable to generate new GUID. uuid_generator not set.\n");
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return -1;
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}
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(*uuid_generator)((uint8_t *)&h->disk_uuid);
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h->entries_lba = 2;
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h->number_of_entries = 128;
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h->size_of_entry = sizeof(GptEntry);
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// Copy to secondary
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RepairHeader(&drive->gpt, MASK_PRIMARY);
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UpdateCrc(&drive->gpt);
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}
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return 0;
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}
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int MtdCreate(struct drive *drive, CgptCreateParams *params) {
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MtdDiskLayout *h = &drive->mtd.primary;
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memset(h, 0, sizeof(*h));
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drive->mtd.modified = 1;
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if (!params->zap) {
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// Prep basic parameters
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memcpy(h->signature, MTD_DRIVE_SIGNATURE, sizeof(h->signature));
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h->size = sizeof(*h);
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h->first_offset = 0;
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h->last_offset = (drive->mtd.drive_sectors * drive->mtd.sector_bytes) - 1;
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h->crc32 = MtdHeaderCrc(h);
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}
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if (params->size) {
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h->last_offset = params->size - 1;
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drive->size = params->size;
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drive->mtd.drive_sectors = drive->size / drive->mtd.sector_bytes;
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} else if (!drive->mtd.drive_sectors) {
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Error("MTD create with params->size == 0 && drive->mtd.drive_sectors == 0");
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return -1;
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}
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return 0;
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}
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int CgptCreate(CgptCreateParams *params) {
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struct drive drive;
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if (params == NULL)
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return CGPT_FAILED;
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if (CGPT_OK != DriveOpen(params->drive_name, &drive, O_RDWR))
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return CGPT_FAILED;
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if (drive.is_mtd) {
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if (MtdCreate(&drive, params))
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goto bad;
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} else {
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if (GptCreate(&drive, params))
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goto bad;
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}
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// Write it all out
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return DriveClose(&drive, 1);
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bad:
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DriveClose(&drive, 0);
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return CGPT_FAILED;
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}
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