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3e92a997 LE |
1 | /** @file\r |
2 | Save Non-Volatile Variables to a file system.\r | |
3 | \r | |
4 | Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>\r | |
b26f0cf9 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
3e92a997 LE |
6 | \r |
7 | **/\r | |
8 | \r | |
9 | #include "NvVarsFileLib.h"\r | |
10 | #include <Library/DebugLib.h>\r | |
11 | #include <Library/NvVarsFileLib.h>\r | |
12 | \r | |
13 | EFI_HANDLE mNvVarsFileLibFsHandle = NULL;\r | |
14 | \r | |
15 | \r | |
16 | /**\r | |
17 | Attempts to connect the NvVarsFileLib to the specified file system.\r | |
18 | \r | |
19 | @param[in] FsHandle - Handle for a gEfiSimpleFileSystemProtocolGuid instance\r | |
20 | \r | |
21 | @return The EFI_STATUS while attempting to connect the NvVarsFileLib\r | |
22 | to the file system instance.\r | |
23 | @retval EFI_SUCCESS - The given file system was connected successfully\r | |
24 | \r | |
25 | **/\r | |
26 | EFI_STATUS\r | |
27 | EFIAPI\r | |
28 | ConnectNvVarsToFileSystem (\r | |
29 | IN EFI_HANDLE FsHandle\r | |
30 | )\r | |
31 | {\r | |
32 | EFI_STATUS Status;\r | |
33 | \r | |
34 | //\r | |
35 | // We might fail to load the variable, since the file system initially\r | |
36 | // will not have the NvVars file.\r | |
37 | //\r | |
38 | LoadNvVarsFromFs (FsHandle);\r | |
39 | \r | |
40 | //\r | |
41 | // We must be able to save the variables successfully to the file system\r | |
42 | // to have connected successfully.\r | |
43 | //\r | |
44 | Status = SaveNvVarsToFs (FsHandle);\r | |
45 | if (!EFI_ERROR (Status)) {\r | |
46 | mNvVarsFileLibFsHandle = FsHandle;\r | |
47 | }\r | |
48 | \r | |
49 | return Status;\r | |
50 | }\r | |
51 | \r | |
52 | \r | |
53 | /**\r | |
54 | Update non-volatile variables stored on the file system.\r | |
55 | \r | |
56 | @return The EFI_STATUS while attempting to update the variable on\r | |
57 | the connected file system.\r | |
58 | @retval EFI_SUCCESS - The non-volatile variables were saved to the disk\r | |
59 | @retval EFI_NOT_STARTED - A file system has not been connected\r | |
60 | \r | |
61 | **/\r | |
62 | EFI_STATUS\r | |
63 | EFIAPI\r | |
64 | UpdateNvVarsOnFileSystem (\r | |
65 | )\r | |
66 | {\r | |
67 | if (mNvVarsFileLibFsHandle == NULL) {\r | |
68 | //\r | |
69 | // A file system had not been connected to the library.\r | |
70 | //\r | |
71 | return EFI_NOT_STARTED;\r | |
72 | } else {\r | |
73 | return SaveNvVarsToFs (mNvVarsFileLibFsHandle);\r | |
74 | }\r | |
75 | }\r | |
76 | \r | |
77 | \r |