1 // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <string.h>
6
7 #include "cgpt.h"
8 #include "cgptlib_internal.h"
9 #include "vboot_host.h"
10
CgptLegacy(CgptLegacyParams * params)11 int CgptLegacy(CgptLegacyParams *params) {
12 struct drive drive;
13 GptHeader *h1, *h2;
14
15 if (params == NULL)
16 return CGPT_FAILED;
17
18 if (CGPT_OK != DriveOpen(params->drive_name, &drive, O_RDWR,
19 params->drive_size))
20 return CGPT_FAILED;
21
22 h1 = (GptHeader *)drive.gpt.primary_header;
23 h2 = (GptHeader *)drive.gpt.secondary_header;
24 if (params->efipart) {
25 memcpy(h1->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
26 memcpy(h2->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
27 RepairEntries(&drive.gpt, MASK_SECONDARY);
28 drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
29 GPT_MODIFIED_HEADER2);
30 } else {
31 memcpy(h1->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
32 memcpy(h2->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
33 memset(drive.gpt.primary_entries, 0, drive.gpt.sector_bytes);
34 drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
35 GPT_MODIFIED_HEADER2);
36 }
37
38 UpdateCrc(&drive.gpt);
39
40 // Write it all out
41 return DriveClose(&drive, 1);
42 }
43