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// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string.h>
#include "cgpt.h"
#include "cgptlib_internal.h"
#include "vboot_host.h"
int CgptLegacy(CgptLegacyParams *params) {
struct drive drive;
int gpt_retval;
GptHeader *h1, *h2;
if (params == NULL)
return CGPT_FAILED;
if (CGPT_OK != DriveOpen(params->drive_name, &drive, O_RDWR,
params->drive_size))
return CGPT_FAILED;
if (GPT_SUCCESS != (gpt_retval = GptSanityCheck(&drive.gpt))) {
Error("GptSanityCheck() returned %d: %s\n",
gpt_retval, GptError(gpt_retval));
goto bad;
}
h1 = (GptHeader *)drive.gpt.primary_header;
h2 = (GptHeader *)drive.gpt.secondary_header;
if (params->mode == CGPT_LEGACY_MODE_EFIPART) {
drive.gpt.ignored = MASK_NONE;
memcpy(h1->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
memcpy(h2->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
RepairEntries(&drive.gpt, MASK_SECONDARY);
drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
GPT_MODIFIED_HEADER2);
} else if (params->mode == CGPT_LEGACY_MODE_IGNORE_PRIMARY) {
if (!(drive.gpt.valid_headers & MASK_SECONDARY) ||
!(drive.gpt.valid_entries & MASK_SECONDARY) ||
drive.gpt.ignored & MASK_SECONDARY) {
Error("Refusing to mark primary GPT ignored unless secondary is valid.");
goto bad;
}
memset(h1, 0, sizeof(*h1));
memcpy(h1->signature, GPT_HEADER_SIGNATURE_IGNORED,
GPT_HEADER_SIGNATURE_SIZE);
drive.gpt.modified |= GPT_MODIFIED_HEADER1;
} else {
memcpy(h1->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
memcpy(h2->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
memset(drive.gpt.primary_entries, 0, drive.gpt.sector_bytes);
drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
GPT_MODIFIED_HEADER2);
}
UpdateCrc(&drive.gpt);
// Write it all out
return DriveClose(&drive, 1);
bad:
(void) DriveClose(&drive, 0);
return CGPT_FAILED;
}
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