1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* EFI Boot Guard
*
* Copyright (c) Siemens AG, 2017
*
* Authors:
* Andreas Reichel <andreas.reichel.ext@siemens.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
* SPDX-License-Identifier: GPL-2.0-only
*/
#include <syspart.h>
#include <utils.h>
#include <envdata.h>
#define MAX_INFO_SIZE 1024
EFI_STATUS enumerate_cfg_parts(UINTN *config_volumes, UINTN *numHandles)
{
BOOLEAN use_envs_on_bootmedium_only = FALSE;
EFI_STATUS status;
UINTN rootCount = 0;
if (!config_volumes || !numHandles) {
ERROR(L"Invalid parameter in system partition enumeration.\n");
return EFI_INVALID_PARAMETER;
}
for (UINTN index = 0; index < volume_count && rootCount < *numHandles;
index++) {
EFI_FILE_HANDLE fh = NULL;
if (!volumes[index].root) {
continue;
}
status = open_cfg_file(volumes[index].root, &fh,
EFI_FILE_MODE_READ);
if (status == EFI_SUCCESS) {
if (volumes[index].onbootmedium) {
use_envs_on_bootmedium_only = TRUE;
}
if (!use_envs_on_bootmedium_only || volumes[index].onbootmedium) {
INFO(L"Config file found on volume %d.\n", index);
config_volumes[rootCount] = index;
rootCount++;
} else {
WARNING(L"Ignoring config file found on volume %d.\n", index);
}
status = close_cfg_file(volumes[index].root, fh);
if (EFI_ERROR(status)) {
ERROR(L"Could not close config file on partition %d.\n",
index);
}
}
}
*numHandles = rootCount;
if (use_envs_on_bootmedium_only) {
INFO(L"Booting with environments from boot medium only.\n");
}
INFO(L"%d config partitions detected.\n", rootCount);
return EFI_SUCCESS;
}
|
