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50944545 | 1 | /** @file |
2 | Save Non-Volatile Variables to a file system. | |
3 | ||
4 | Copyright (c) 2009, Intel Corporation. <BR> | |
5 | All rights reserved. This program and the accompanying materials | |
6 | are licensed and made available under the terms and conditions of the BSD License | |
7 | which accompanies this distribution. The full text of the license may be found at | |
8 | http://opensource.org/licenses/bsd-license.php | |
9 | ||
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
12 | ||
13 | **/ | |
14 | ||
15 | #include "NvVarsFileLib.h" | |
16 | #include <Library/DebugLib.h> | |
17 | #include <Library/NvVarsFileLib.h> | |
18 | ||
9607962d | 19 | EFI_HANDLE mNvVarsFileLibFsHandle = NULL; |
20 | ||
50944545 | 21 | |
22 | /** | |
23 | Attempts to connect the NvVarsFileLib to the specified file system. | |
24 | ||
25 | @param[in] FsHandle - Handle for a gEfiSimpleFileSystemProtocolGuid instance | |
26 | ||
27 | @return The EFI_STATUS while attempting to connect the NvVarsFileLib | |
28 | to the file system instance. | |
29 | @retval EFI_SUCCESS - The given file system was connected successfully | |
30 | ||
31 | **/ | |
32 | EFI_STATUS | |
33 | EFIAPI | |
34 | ConnectNvVarsToFileSystem ( | |
35 | IN EFI_HANDLE FsHandle | |
36 | ) | |
37 | { | |
38 | EFI_STATUS Status; | |
39 | ||
40 | // | |
41 | // We might fail to load the variable, since the file system initially | |
42 | // will not have the NvVars file. | |
43 | // | |
44 | LoadNvVarsFromFs (FsHandle); | |
45 | ||
46 | // | |
47 | // We must be able to save the variables successfully to the file system | |
48 | // to have connected successfully. | |
49 | // | |
50 | Status = SaveNvVarsToFs (FsHandle); | |
9607962d | 51 | if (!EFI_ERROR (Status)) { |
52 | mNvVarsFileLibFsHandle = FsHandle; | |
53 | } | |
50944545 | 54 | |
55 | return Status; | |
56 | } | |
57 | ||
58 | ||
9607962d | 59 | /** |
60 | Update non-volatile variables stored on the file system. | |
61 | ||
62 | @return The EFI_STATUS while attempting to update the variable on | |
63 | the connected file system. | |
64 | @retval EFI_SUCCESS - The non-volatile variables were saved to the disk | |
65 | @retval EFI_NOT_STARTED - A file system has not been connected | |
66 | ||
67 | **/ | |
68 | EFI_STATUS | |
69 | EFIAPI | |
70 | UpdateNvVarsOnFileSystem ( | |
71 | ) | |
72 | { | |
73 | if (mNvVarsFileLibFsHandle == NULL) { | |
74 | // | |
75 | // A file system had not been connected to the library. | |
76 | // | |
77 | return EFI_NOT_STARTED; | |
78 | } else { | |
79 | return SaveNvVarsToFs (mNvVarsFileLibFsHandle); | |
80 | } | |
81 | } | |
82 | ||
83 |