projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 |