67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
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/* 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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*/
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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 CgptLegacy(CgptLegacyParams *params) {
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struct drive drive;
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int gpt_retval;
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GptHeader *h1, *h2;
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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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params->drive_size))
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return CGPT_FAILED;
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if (GPT_SUCCESS != (gpt_retval = GptSanityCheck(&drive.gpt))) {
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Error("GptSanityCheck() returned %d: %s\n",
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gpt_retval, GptError(gpt_retval));
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goto bad;
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}
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h1 = (GptHeader *)drive.gpt.primary_header;
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h2 = (GptHeader *)drive.gpt.secondary_header;
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if (params->mode == CGPT_LEGACY_MODE_EFIPART) {
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drive.gpt.ignored = MASK_NONE;
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memcpy(h1->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
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memcpy(h2->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
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RepairEntries(&drive.gpt, MASK_SECONDARY);
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drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
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GPT_MODIFIED_HEADER2);
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} else if (params->mode == CGPT_LEGACY_MODE_IGNORE_PRIMARY) {
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if (!(drive.gpt.valid_headers & MASK_SECONDARY) ||
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!(drive.gpt.valid_entries & MASK_SECONDARY) ||
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drive.gpt.ignored & MASK_SECONDARY) {
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Error("Refusing to mark primary GPT ignored unless secondary is valid.");
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goto bad;
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}
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memset(h1, 0, sizeof(*h1));
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memcpy(h1->signature, GPT_HEADER_SIGNATURE_IGNORED,
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GPT_HEADER_SIGNATURE_SIZE);
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drive.gpt.modified |= GPT_MODIFIED_HEADER1;
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} else {
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memcpy(h1->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
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memcpy(h2->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
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memset(drive.gpt.primary_entries, 0, drive.gpt.sector_bytes);
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drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
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GPT_MODIFIED_HEADER2);
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}
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UpdateCrc(&drive.gpt);
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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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(void) DriveClose(&drive, 0);
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return CGPT_FAILED;
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}
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