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cae7420b DB |
1 | /** @file\r |
2 | OpenVolume() function of Simple File System Protocol.\r | |
b9ec9330 | 3 | \r |
149d6335 | 4 | Copyright (c) 2005 - 2013, Intel Corporation. All rights reserved.<BR>\r |
eb6cb4ce | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
b9ec9330 | 6 | \r |
cae7420b | 7 | **/\r |
b9ec9330 | 8 | \r |
cae7420b | 9 | #include "Fat.h"\r |
b9ec9330 | 10 | \r |
cae7420b | 11 | /**\r |
b9ec9330 | 12 | \r |
cae7420b | 13 | Implements Simple File System Protocol interface function OpenVolume().\r |
b9ec9330 | 14 | \r |
cae7420b DB |
15 | @param This - Calling context.\r |
16 | @param File - the Root Directory of the volume.\r | |
b9ec9330 | 17 | \r |
cae7420b DB |
18 | @retval EFI_OUT_OF_RESOURCES - Can not allocate the memory.\r |
19 | @retval EFI_VOLUME_CORRUPTED - The FAT type is error.\r | |
20 | @retval EFI_SUCCESS - Open the volume successfully.\r | |
b9ec9330 | 21 | \r |
cae7420b | 22 | **/\r |
b9ec9330 QH |
23 | EFI_STATUS\r |
24 | EFIAPI\r | |
25 | FatOpenVolume (\r | |
26 | IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,\r | |
dba03ba1 | 27 | OUT EFI_FILE_PROTOCOL **File\r |
b9ec9330 | 28 | )\r |
b9ec9330 QH |
29 | {\r |
30 | EFI_STATUS Status;\r | |
31 | FAT_VOLUME *Volume;\r | |
32 | FAT_IFILE *IFile;\r | |
33 | \r | |
34 | Volume = VOLUME_FROM_VOL_INTERFACE (This);\r | |
35 | FatAcquireLock ();\r | |
36 | \r | |
37 | //\r | |
38 | // Open Root file\r | |
39 | //\r | |
40 | Status = FatOpenDirEnt (NULL, &Volume->RootDirEnt);\r | |
41 | if (EFI_ERROR (Status)) {\r | |
42 | goto Done;\r | |
43 | }\r | |
44 | //\r | |
45 | // Open a new instance to the root\r | |
46 | //\r | |
47 | Status = FatAllocateIFile (Volume->Root, &IFile);\r | |
48 | if (!EFI_ERROR (Status)) {\r | |
49 | *File = &IFile->Handle;\r | |
50 | }\r | |
51 | \r | |
52 | Done:\r | |
53 | \r | |
149d6335 | 54 | Status = FatCleanupVolume (Volume, Volume->Root, Status, NULL);\r |
b9ec9330 QH |
55 | FatReleaseLock ();\r |
56 | \r | |
57 | return Status;\r | |
58 | }\r |