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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
4 | This program and the accompanying materials\r | |
5 | are licensed and made available under the terms and conditions of the BSD License\r | |
6 | which accompanies this distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | FileStorage.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | handles variable store/reads on file\r | |
19 | \r | |
20 | Revision History\r | |
21 | \r | |
22 | --*/\r | |
23 | #include "FSVariable.h"\r | |
24 | \r | |
25 | VOID *mSFSRegistration;\r | |
26 | \r | |
27 | //\r | |
28 | // Prototypes\r | |
29 | //\r | |
30 | \r | |
31 | VOID\r | |
32 | EFIAPI\r | |
33 | OnVirtualAddressChangeFs (\r | |
34 | IN EFI_EVENT Event,\r | |
35 | IN VOID *Context\r | |
36 | );\r | |
37 | \r | |
38 | EFI_STATUS\r | |
39 | EFIAPI\r | |
40 | FileEraseStore(\r | |
41 | IN VARIABLE_STORAGE *This\r | |
42 | );\r | |
43 | \r | |
44 | EFI_STATUS\r | |
45 | EFIAPI\r | |
46 | FileWriteStore (\r | |
47 | IN VARIABLE_STORAGE *This,\r | |
48 | IN UINTN Offset,\r | |
49 | IN UINTN BufferSize,\r | |
50 | IN VOID *Buffer\r | |
51 | );\r | |
52 | \r | |
53 | EFI_STATUS\r | |
54 | OpenStore (\r | |
55 | IN EFI_DEVICE_PATH_PROTOCOL *Device,\r | |
56 | IN CHAR16 *FilePathName,\r | |
57 | IN UINT64 OpenMode,\r | |
58 | OUT EFI_FILE_PROTOCOL **File\r | |
59 | );\r | |
60 | \r | |
61 | //\r | |
62 | // Implementation below:\r | |
63 | //\r | |
64 | VOID\r | |
65 | FileClose (\r | |
66 | IN EFI_FILE_PROTOCOL *File\r | |
67 | )\r | |
68 | {\r | |
69 | EFI_STATUS Status;\r | |
70 | \r | |
71 | Status = File->Flush (File);\r | |
72 | ASSERT_EFI_ERROR (Status);\r | |
73 | \r | |
74 | Status = File->Close (File);\r | |
75 | ASSERT_EFI_ERROR (Status);\r | |
76 | }\r | |
77 | \r | |
78 | EFI_STATUS\r | |
79 | CheckStore (\r | |
80 | IN EFI_HANDLE SimpleFileSystemHandle,\r | |
81 | IN UINT32 VolumeId,\r | |
82 | OUT EFI_DEVICE_PATH_PROTOCOL **Device\r | |
83 | )\r | |
84 | {\r | |
85 | #define BLOCK_SIZE 0x200\r | |
86 | #define FAT16_VOLUME_ID_OFFSET 39\r | |
87 | #define FAT32_VOLUME_ID_OFFSET 67\r | |
88 | EFI_STATUS Status;\r | |
89 | EFI_BLOCK_IO_PROTOCOL *BlkIo;\r | |
90 | UINT8 BootSector[BLOCK_SIZE];\r | |
91 | \r | |
92 | *Device = NULL;\r | |
93 | Status = gBS->HandleProtocol (\r | |
94 | SimpleFileSystemHandle,\r | |
95 | &gEfiBlockIoProtocolGuid, // BlockIo should be supported if it supports SimpleFileSystem\r | |
96 | (VOID*)&BlkIo\r | |
97 | );\r | |
98 | \r | |
99 | if (EFI_ERROR (Status)) {\r | |
100 | goto ErrHandle;\r | |
101 | }\r | |
102 | if (!BlkIo->Media->MediaPresent) {\r | |
103 | DEBUG ((EFI_D_ERROR, "FileStorage: Media not present!\n"));\r | |
104 | Status = EFI_NO_MEDIA;\r | |
105 | goto ErrHandle;\r | |
106 | }\r | |
107 | if (BlkIo->Media->ReadOnly) {\r | |
108 | DEBUG ((EFI_D_ERROR, "FileStorage: Media is read-only!\n"));\r | |
109 | Status = EFI_ACCESS_DENIED;\r | |
110 | goto ErrHandle;\r | |
111 | }\r | |
112 | \r | |
113 | Status = BlkIo->ReadBlocks(\r | |
114 | BlkIo,\r | |
115 | BlkIo->Media->MediaId,\r | |
116 | 0,\r | |
117 | BLOCK_SIZE,\r | |
118 | BootSector\r | |
119 | );\r | |
120 | ASSERT_EFI_ERROR (Status);\r | |
121 | if ((*(UINT32 *) &BootSector[FAT16_VOLUME_ID_OFFSET] != VolumeId) &&\r | |
122 | (*(UINT32 *) &BootSector[FAT32_VOLUME_ID_OFFSET] != VolumeId)\r | |
123 | ) {\r | |
124 | Status = EFI_NOT_FOUND;\r | |
125 | goto ErrHandle;\r | |
126 | }\r | |
127 | \r | |
128 | *Device = DuplicateDevicePath (DevicePathFromHandle (SimpleFileSystemHandle));\r | |
129 | ASSERT (*Device != NULL);\r | |
130 | \r | |
131 | ErrHandle:\r | |
132 | return Status;\r | |
133 | }\r | |
134 | \r | |
135 | EFI_STATUS\r | |
136 | CheckStoreExists (\r | |
137 | IN EFI_DEVICE_PATH_PROTOCOL *Device\r | |
138 | )\r | |
139 | {\r | |
140 | EFI_HANDLE Handle;\r | |
141 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;\r | |
142 | EFI_STATUS Status;\r | |
143 | \r | |
144 | Status = gBS->LocateDevicePath (\r | |
145 | &gEfiSimpleFileSystemProtocolGuid,\r | |
146 | &Device, \r | |
147 | &Handle\r | |
148 | );\r | |
149 | \r | |
150 | if (EFI_ERROR (Status)) {\r | |
151 | return Status;\r | |
152 | }\r | |
153 | \r | |
154 | Status = gBS->HandleProtocol (\r | |
155 | Handle,\r | |
156 | &gEfiSimpleFileSystemProtocolGuid,\r | |
157 | (VOID **) &Volume\r | |
158 | );\r | |
159 | if (EFI_ERROR (Status)) {\r | |
160 | return Status;\r | |
161 | }\r | |
162 | \r | |
163 | return EFI_SUCCESS;\r | |
164 | }\r | |
165 | \r | |
166 | // this routine is still running in BS period, no limitation\r | |
167 | // call FileInitStorage(), which load variable content file to memory\r | |
168 | // read the store_header, init store_header if it has not been inited (read sth. about format/heathy)\r | |
169 | // reclaim space using scratch memory\r | |
170 | \r | |
171 | VOID\r | |
172 | EFIAPI\r | |
173 | OnSimpleFileSystemInstall (\r | |
174 | IN EFI_EVENT Event,\r | |
175 | IN VOID *Context\r | |
176 | )\r | |
177 | {\r | |
178 | EFI_STATUS Status;\r | |
179 | UINTN HandleSize;\r | |
180 | EFI_HANDLE Handle;\r | |
181 | EFI_DEVICE_PATH_PROTOCOL *Device;\r | |
182 | VS_DEV *Dev;\r | |
183 | EFI_FILE_PROTOCOL *File;\r | |
184 | UINTN NumBytes;\r | |
185 | \r | |
186 | Dev = (VS_DEV *) Context;\r | |
187 | \r | |
188 | if (VAR_FILE_DEVICEPATH (Dev) != NULL &&\r | |
189 | !EFI_ERROR (CheckStoreExists (VAR_FILE_DEVICEPATH (Dev)))\r | |
190 | ) {\r | |
191 | DEBUG ((EFI_D_ERROR, "FileStorage: Already mapped!\n"));\r | |
192 | return ;\r | |
193 | }\r | |
194 | \r | |
195 | while (TRUE) {\r | |
196 | HandleSize = sizeof (EFI_HANDLE);\r | |
197 | Status = gBS->LocateHandle (\r | |
198 | ByRegisterNotify,\r | |
199 | NULL,\r | |
200 | mSFSRegistration,\r | |
201 | &HandleSize,\r | |
202 | &Handle\r | |
203 | );\r | |
204 | if (EFI_ERROR (Status)) {\r | |
205 | return ;\r | |
206 | }\r | |
207 | \r | |
208 | Status = CheckStore (Handle, VAR_FILE_VOLUMEID (Dev), &Device);\r | |
209 | if (!EFI_ERROR (Status)) {\r | |
210 | break;\r | |
211 | }\r | |
212 | }\r | |
213 | \r | |
214 | VAR_FILE_DEVICEPATH (Dev) = Device;\r | |
215 | Status = OpenStore (\r | |
216 | VAR_FILE_DEVICEPATH (Dev), \r | |
217 | VAR_FILE_FILEPATH (Dev), \r | |
218 | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_READ | EFI_FILE_MODE_CREATE,\r | |
219 | &File\r | |
220 | );\r | |
221 | ASSERT_EFI_ERROR (Status);\r | |
222 | \r | |
223 | NumBytes = Dev->Size;\r | |
224 | Status = File->Write (File, &NumBytes, VAR_DATA_PTR (Dev));\r | |
225 | ASSERT_EFI_ERROR (Status);\r | |
226 | FileClose (File);\r | |
227 | DEBUG ((EFI_D_ERROR, "FileStorage: Mapped to file!\n"));\r | |
228 | }\r | |
229 | \r | |
230 | EFI_STATUS\r | |
231 | FileStorageConstructor (\r | |
232 | OUT VARIABLE_STORAGE **VarStore,\r | |
233 | OUT EFI_EVENT_NOTIFY *GoVirtualEvent,\r | |
234 | IN EFI_PHYSICAL_ADDRESS NvStorageBase,\r | |
235 | IN UINTN Size,\r | |
236 | IN UINT32 VolumeId,\r | |
237 | IN CHAR16 *FilePath\r | |
238 | )\r | |
239 | {\r | |
240 | VS_DEV *Dev;\r | |
241 | EFI_STATUS Status;\r | |
242 | EFI_EVENT Event;\r | |
243 | \r | |
244 | Status = gBS->AllocatePool (EfiRuntimeServicesData, sizeof(VS_DEV), (VOID **) &Dev);\r | |
245 | ASSERT_EFI_ERROR (Status);\r | |
246 | ZeroMem (Dev, sizeof(VS_DEV));\r | |
247 | \r | |
248 | Dev->Signature = VS_DEV_SIGNATURE;\r | |
249 | Dev->Size = Size;\r | |
250 | VAR_DATA_PTR (Dev) = (UINT8 *) (UINTN) NvStorageBase;\r | |
251 | VAR_FILE_VOLUMEID (Dev) = VolumeId;\r | |
252 | StrCpy (VAR_FILE_FILEPATH (Dev), FilePath);\r | |
253 | Dev->VarStore.Erase = FileEraseStore;\r | |
254 | Dev->VarStore.Write = FileWriteStore;\r | |
255 | \r | |
256 | DEBUG ((EFI_D_ERROR, "FileStorageConstructor(0x%0x:0x%0x): added!\n", NvStorageBase, Size));\r | |
257 | \r | |
258 | // add notify on SFS's installation.\r | |
259 | \r | |
260 | Status = gBS->CreateEvent (\r | |
261 | EVT_NOTIFY_SIGNAL,\r | |
262 | TPL_CALLBACK,\r | |
263 | OnSimpleFileSystemInstall,\r | |
264 | Dev,\r | |
265 | &Event\r | |
266 | );\r | |
267 | ASSERT_EFI_ERROR (Status);\r | |
268 | \r | |
269 | Status = gBS->RegisterProtocolNotify (\r | |
270 | &gEfiSimpleFileSystemProtocolGuid,\r | |
271 | Event,\r | |
272 | &mSFSRegistration\r | |
273 | );\r | |
274 | ASSERT_EFI_ERROR (Status);\r | |
275 | \r | |
276 | *VarStore = &Dev->VarStore;\r | |
277 | *GoVirtualEvent = OnVirtualAddressChangeFs;\r | |
278 | return EFI_SUCCESS;\r | |
279 | }\r | |
280 | \r | |
281 | EFI_STATUS\r | |
282 | EFIAPI\r | |
283 | FileEraseStore(\r | |
284 | IN VARIABLE_STORAGE *This\r | |
285 | )\r | |
286 | {\r | |
287 | EFI_STATUS Status;\r | |
288 | VS_DEV *Dev;\r | |
289 | EFI_FILE_PROTOCOL *File;\r | |
290 | UINTN NumBytes;\r | |
291 | \r | |
292 | Status = EFI_SUCCESS;\r | |
293 | Dev = DEV_FROM_THIS(This);\r | |
294 | \r | |
295 | SetMem (VAR_DATA_PTR (Dev), Dev->Size, VAR_DEFAULT_VALUE);\r | |
296 | \r | |
297 | if (!EfiAtRuntime () && VAR_FILE_DEVICEPATH (Dev) != NULL) {\r | |
298 | Status = OpenStore (\r | |
299 | VAR_FILE_DEVICEPATH (Dev), \r | |
300 | VAR_FILE_FILEPATH (Dev), \r | |
301 | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_READ,\r | |
302 | &File\r | |
303 | );\r | |
304 | ASSERT_EFI_ERROR (Status);\r | |
305 | NumBytes = Dev->Size;\r | |
306 | Status = File->Write (File, &NumBytes, VAR_DATA_PTR (Dev));\r | |
307 | ASSERT_EFI_ERROR (Status);\r | |
308 | FileClose (File);\r | |
309 | }\r | |
310 | \r | |
311 | return Status;\r | |
312 | }\r | |
313 | \r | |
314 | EFI_STATUS\r | |
315 | EFIAPI\r | |
316 | FileWriteStore (\r | |
317 | IN VARIABLE_STORAGE *This,\r | |
318 | IN UINTN Offset,\r | |
319 | IN UINTN BufferSize,\r | |
320 | IN VOID *Buffer\r | |
321 | )\r | |
322 | {\r | |
323 | EFI_STATUS Status;\r | |
324 | VS_DEV *Dev;\r | |
325 | EFI_FILE_PROTOCOL *File;\r | |
326 | \r | |
327 | Status = EFI_SUCCESS;\r | |
328 | Dev = DEV_FROM_THIS(This);\r | |
329 | \r | |
330 | ASSERT (Buffer != NULL);\r | |
331 | ASSERT (Offset + BufferSize <= Dev->Size);\r | |
332 | \r | |
333 | CopyMem (VAR_DATA_PTR (Dev) + Offset, Buffer, BufferSize);\r | |
334 | \r | |
335 | if (!EfiAtRuntime () && VAR_FILE_DEVICEPATH (Dev) != NULL) {\r | |
336 | Status = OpenStore (\r | |
337 | VAR_FILE_DEVICEPATH (Dev), \r | |
338 | VAR_FILE_FILEPATH (Dev), \r | |
339 | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_READ,\r | |
340 | &File\r | |
341 | );\r | |
342 | Status = File->SetPosition (File, Offset);\r | |
343 | ASSERT_EFI_ERROR (Status);\r | |
344 | Status = File->Write (File, &BufferSize, Buffer);\r | |
345 | ASSERT_EFI_ERROR (Status);\r | |
346 | FileClose (File);\r | |
347 | }\r | |
348 | return Status;\r | |
349 | }\r | |
350 | \r | |
351 | VOID\r | |
352 | EFIAPI\r | |
353 | OnVirtualAddressChangeFs (\r | |
354 | IN EFI_EVENT Event,\r | |
355 | IN VOID *Context\r | |
356 | )\r | |
357 | {\r | |
358 | VS_DEV *Dev;\r | |
359 | \r | |
360 | Dev = DEV_FROM_THIS (Context);\r | |
361 | \r | |
362 | EfiConvertPointer (0, (VOID **) &VAR_DATA_PTR (Dev));\r | |
363 | EfiConvertPointer (0, (VOID **) &Dev->VarStore.Erase);\r | |
364 | EfiConvertPointer (0, (VOID **) &Dev->VarStore.Write);\r | |
365 | }\r | |
366 | \r | |
367 | EFI_STATUS\r | |
368 | OpenStore (\r | |
369 | IN EFI_DEVICE_PATH_PROTOCOL *Device,\r | |
370 | IN CHAR16 *FilePathName,\r | |
371 | IN UINT64 OpenMode,\r | |
372 | OUT EFI_FILE_PROTOCOL **File\r | |
373 | )\r | |
374 | {\r | |
375 | EFI_HANDLE Handle;\r | |
376 | EFI_FILE_HANDLE Root;\r | |
377 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;\r | |
378 | EFI_STATUS Status;\r | |
379 | \r | |
380 | *File = NULL;\r | |
381 | \r | |
382 | Status = gBS->LocateDevicePath (\r | |
383 | &gEfiSimpleFileSystemProtocolGuid,\r | |
384 | &Device, \r | |
385 | &Handle\r | |
386 | );\r | |
387 | \r | |
388 | if (EFI_ERROR (Status)) {\r | |
389 | return Status;\r | |
390 | }\r | |
391 | \r | |
392 | Status = gBS->HandleProtocol (\r | |
393 | Handle,\r | |
394 | &gEfiSimpleFileSystemProtocolGuid,\r | |
395 | (VOID **) &Volume\r | |
396 | );\r | |
397 | if (EFI_ERROR (Status)) {\r | |
398 | return Status;\r | |
399 | }\r | |
400 | \r | |
401 | //\r | |
402 | // Open the root directory of the volume\r | |
403 | //\r | |
404 | Root = NULL;\r | |
405 | Status = Volume->OpenVolume (\r | |
406 | Volume,\r | |
407 | &Root\r | |
408 | );\r | |
409 | ASSERT_EFI_ERROR (Status);\r | |
410 | ASSERT (Root != NULL);\r | |
411 | \r | |
412 | //\r | |
413 | // Open file\r | |
414 | //\r | |
415 | Status = Root->Open (\r | |
416 | Root,\r | |
417 | File,\r | |
418 | FilePathName,\r | |
419 | OpenMode,\r | |
420 | 0\r | |
421 | );\r | |
422 | if (EFI_ERROR (Status)) {\r | |
423 | *File = NULL;\r | |
424 | }\r | |
425 | \r | |
426 | //\r | |
427 | // Close the Root directory\r | |
428 | //\r | |
429 | Root->Close (Root);\r | |
430 | return Status;\r | |
431 | }\r |