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1 | /** @file\r |
2 | Scan for an UDF file system on a formatted media.\r | |
3 | \r | |
4 | Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>\r | |
5 | \r | |
6 | This program and the accompanying materials are licensed and made available\r | |
7 | under the terms and conditions of the BSD License which accompanies this\r | |
8 | distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
12 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | **/\r | |
14 | \r | |
15 | #include "Partition.h"\r | |
16 | \r | |
17 | //\r | |
18 | // C5BD4D42-1A76-4996-8956-73CDA326CD0A\r | |
19 | //\r | |
20 | #define EFI_UDF_DEVICE_PATH_GUID \\r | |
21 | { 0xC5BD4D42, 0x1A76, 0x4996, \\r | |
22 | { 0x89, 0x56, 0x73, 0xCD, 0xA3, 0x26, 0xCD, 0x0A } \\r | |
23 | }\r | |
24 | \r | |
25 | typedef struct {\r | |
26 | VENDOR_DEVICE_PATH DevicePath;\r | |
27 | EFI_DEVICE_PATH_PROTOCOL End;\r | |
28 | } UDF_DEVICE_PATH;\r | |
29 | \r | |
30 | //\r | |
31 | // Vendor-Defined Media Device Path for UDF file system\r | |
32 | //\r | |
33 | UDF_DEVICE_PATH gUdfDevicePath = {\r | |
34 | { { MEDIA_DEVICE_PATH, MEDIA_VENDOR_DP,\r | |
35 | { sizeof (VENDOR_DEVICE_PATH), 0 } },\r | |
36 | EFI_UDF_DEVICE_PATH_GUID\r | |
37 | },\r | |
38 | { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE,\r | |
39 | { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 }\r | |
40 | }\r | |
41 | };\r | |
42 | \r | |
43 | EFI_STATUS\r | |
44 | FindAnchorVolumeDescriptorPointer (\r | |
45 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
46 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
47 | OUT UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER *AnchorPoint\r | |
48 | )\r | |
49 | {\r | |
50 | EFI_STATUS Status;\r | |
51 | UINT32 BlockSize = BlockIo->Media->BlockSize;\r | |
52 | EFI_LBA EndLBA = BlockIo->Media->LastBlock;\r | |
53 | EFI_LBA DescriptorLBAs[] = { 256, EndLBA - 256, EndLBA, 512 };\r | |
54 | UINTN Index;\r | |
55 | \r | |
56 | for (Index = 0; Index < ARRAY_SIZE (DescriptorLBAs); Index++) {\r | |
57 | Status = DiskIo->ReadDisk (\r | |
58 | DiskIo,\r | |
59 | BlockIo->Media->MediaId,\r | |
60 | MultU64x32 (DescriptorLBAs[Index], BlockSize),\r | |
61 | sizeof (UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER),\r | |
62 | (VOID *)AnchorPoint\r | |
63 | );\r | |
64 | if (EFI_ERROR (Status)) {\r | |
65 | return Status;\r | |
66 | }\r | |
67 | //\r | |
68 | // Check if read LBA has a valid AVDP descriptor.\r | |
69 | //\r | |
70 | if (IS_AVDP (AnchorPoint)) {\r | |
71 | return EFI_SUCCESS;\r | |
72 | }\r | |
73 | }\r | |
74 | //\r | |
75 | // No AVDP found.\r | |
76 | //\r | |
77 | return EFI_VOLUME_CORRUPTED;\r | |
78 | }\r | |
79 | \r | |
80 | /**\r | |
81 | Check if block device supports a valid UDF file system as specified by OSTA\r | |
82 | Universal Disk Format Specification 2.60.\r | |
83 | \r | |
84 | @param[in] BlockIo BlockIo interface.\r | |
85 | @param[in] DiskIo DiskIo interface.\r | |
86 | \r | |
87 | @retval EFI_SUCCESS UDF file system found.\r | |
88 | @retval EFI_UNSUPPORTED UDF file system not found.\r | |
89 | @retval EFI_NO_MEDIA The device has no media.\r | |
90 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
91 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
92 | @retval EFI_OUT_OF_RESOURCES The scan was not successful due to lack of\r | |
93 | resources.\r | |
94 | \r | |
95 | **/\r | |
96 | EFI_STATUS\r | |
97 | SupportUdfFileSystem (\r | |
98 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
99 | IN EFI_DISK_IO_PROTOCOL *DiskIo\r | |
100 | )\r | |
101 | {\r | |
102 | EFI_STATUS Status;\r | |
103 | UINT64 Offset;\r | |
104 | UINT64 EndDiskOffset;\r | |
105 | CDROM_VOLUME_DESCRIPTOR VolDescriptor;\r | |
106 | CDROM_VOLUME_DESCRIPTOR TerminatingVolDescriptor;\r | |
107 | UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER AnchorPoint;\r | |
108 | \r | |
109 | ZeroMem ((VOID *)&TerminatingVolDescriptor, sizeof (CDROM_VOLUME_DESCRIPTOR));\r | |
110 | \r | |
111 | //\r | |
112 | // Start Volume Recognition Sequence\r | |
113 | //\r | |
114 | EndDiskOffset = MultU64x32 (BlockIo->Media->LastBlock,\r | |
115 | BlockIo->Media->BlockSize);\r | |
116 | \r | |
117 | for (Offset = UDF_VRS_START_OFFSET; Offset < EndDiskOffset;\r | |
118 | Offset += UDF_LOGICAL_SECTOR_SIZE) {\r | |
119 | //\r | |
120 | // Check if block device has a Volume Structure Descriptor and an Extended\r | |
121 | // Area.\r | |
122 | //\r | |
123 | Status = DiskIo->ReadDisk (\r | |
124 | DiskIo,\r | |
125 | BlockIo->Media->MediaId,\r | |
126 | Offset,\r | |
127 | sizeof (CDROM_VOLUME_DESCRIPTOR),\r | |
128 | (VOID *)&VolDescriptor\r | |
129 | );\r | |
130 | if (EFI_ERROR (Status)) {\r | |
131 | return Status;\r | |
132 | }\r | |
133 | \r | |
134 | if (CompareMem ((VOID *)VolDescriptor.Unknown.Id,\r | |
135 | (VOID *)UDF_BEA_IDENTIFIER,\r | |
136 | sizeof (VolDescriptor.Unknown.Id)) == 0) {\r | |
137 | break;\r | |
138 | }\r | |
139 | \r | |
140 | if ((CompareMem ((VOID *)VolDescriptor.Unknown.Id,\r | |
141 | (VOID *)CDVOL_ID,\r | |
142 | sizeof (VolDescriptor.Unknown.Id)) != 0) ||\r | |
143 | (CompareMem ((VOID *)&VolDescriptor,\r | |
144 | (VOID *)&TerminatingVolDescriptor,\r | |
145 | sizeof (CDROM_VOLUME_DESCRIPTOR)) == 0)) {\r | |
146 | return EFI_UNSUPPORTED;\r | |
147 | }\r | |
148 | }\r | |
149 | \r | |
150 | //\r | |
151 | // Look for "NSR0{2,3}" identifiers in the Extended Area.\r | |
152 | //\r | |
153 | Offset += UDF_LOGICAL_SECTOR_SIZE;\r | |
154 | if (Offset >= EndDiskOffset) {\r | |
155 | return EFI_UNSUPPORTED;\r | |
156 | }\r | |
157 | \r | |
158 | Status = DiskIo->ReadDisk (\r | |
159 | DiskIo,\r | |
160 | BlockIo->Media->MediaId,\r | |
161 | Offset,\r | |
162 | sizeof (CDROM_VOLUME_DESCRIPTOR),\r | |
163 | (VOID *)&VolDescriptor\r | |
164 | );\r | |
165 | if (EFI_ERROR (Status)) {\r | |
166 | return Status;\r | |
167 | }\r | |
168 | \r | |
169 | if ((CompareMem ((VOID *)VolDescriptor.Unknown.Id,\r | |
170 | (VOID *)UDF_NSR2_IDENTIFIER,\r | |
171 | sizeof (VolDescriptor.Unknown.Id)) != 0) &&\r | |
172 | (CompareMem ((VOID *)VolDescriptor.Unknown.Id,\r | |
173 | (VOID *)UDF_NSR3_IDENTIFIER,\r | |
174 | sizeof (VolDescriptor.Unknown.Id)) != 0)) {\r | |
175 | return EFI_UNSUPPORTED;\r | |
176 | }\r | |
177 | \r | |
178 | //\r | |
179 | // Look for "TEA01" identifier in the Extended Area\r | |
180 | //\r | |
181 | Offset += UDF_LOGICAL_SECTOR_SIZE;\r | |
182 | if (Offset >= EndDiskOffset) {\r | |
183 | return EFI_UNSUPPORTED;\r | |
184 | }\r | |
185 | \r | |
186 | Status = DiskIo->ReadDisk (\r | |
187 | DiskIo,\r | |
188 | BlockIo->Media->MediaId,\r | |
189 | Offset,\r | |
190 | sizeof (CDROM_VOLUME_DESCRIPTOR),\r | |
191 | (VOID *)&VolDescriptor\r | |
192 | );\r | |
193 | if (EFI_ERROR (Status)) {\r | |
194 | return Status;\r | |
195 | }\r | |
196 | \r | |
197 | if (CompareMem ((VOID *)VolDescriptor.Unknown.Id,\r | |
198 | (VOID *)UDF_TEA_IDENTIFIER,\r | |
199 | sizeof (VolDescriptor.Unknown.Id)) != 0) {\r | |
200 | return EFI_UNSUPPORTED;\r | |
201 | }\r | |
202 | \r | |
203 | Status = FindAnchorVolumeDescriptorPointer (BlockIo, DiskIo, &AnchorPoint);\r | |
204 | if (EFI_ERROR (Status)) {\r | |
205 | return EFI_UNSUPPORTED;\r | |
206 | }\r | |
207 | \r | |
208 | return EFI_SUCCESS;\r | |
209 | }\r | |
210 | \r | |
211 | /**\r | |
212 | Install child handles if the Handle supports UDF/ECMA-167 volume format.\r | |
213 | \r | |
214 | @param[in] This Calling context.\r | |
215 | @param[in] Handle Parent Handle.\r | |
216 | @param[in] DiskIo Parent DiskIo interface.\r | |
217 | @param[in] DiskIo2 Parent DiskIo2 interface.\r | |
218 | @param[in] BlockIo Parent BlockIo interface.\r | |
219 | @param[in] BlockIo2 Parent BlockIo2 interface.\r | |
220 | @param[in] DevicePath Parent Device Path\r | |
221 | \r | |
222 | \r | |
223 | @retval EFI_SUCCESS Child handle(s) was added.\r | |
224 | @retval EFI_MEDIA_CHANGED Media changed Detected.\r | |
225 | @retval other no child handle was added.\r | |
226 | \r | |
227 | **/\r | |
228 | EFI_STATUS\r | |
229 | PartitionInstallUdfChildHandles (\r | |
230 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
231 | IN EFI_HANDLE Handle,\r | |
232 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
233 | IN EFI_DISK_IO2_PROTOCOL *DiskIo2,\r | |
234 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
235 | IN EFI_BLOCK_IO2_PROTOCOL *BlockIo2,\r | |
236 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r | |
237 | )\r | |
238 | {\r | |
239 | EFI_STATUS Status;\r | |
240 | EFI_BLOCK_IO_MEDIA *Media;\r | |
241 | EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;\r | |
242 | EFI_GUID *VendorDefinedGuid;\r | |
243 | EFI_GUID UdfDevPathGuid = EFI_UDF_DEVICE_PATH_GUID;\r | |
244 | EFI_PARTITION_INFO_PROTOCOL PartitionInfo;\r | |
245 | \r | |
246 | Media = BlockIo->Media;\r | |
247 | \r | |
248 | //\r | |
249 | // Check if UDF logical block size is multiple of underlying device block size\r | |
250 | //\r | |
251 | if ((UDF_LOGICAL_SECTOR_SIZE % Media->BlockSize) != 0 ||\r | |
252 | Media->BlockSize > UDF_LOGICAL_SECTOR_SIZE) {\r | |
253 | return EFI_NOT_FOUND;\r | |
254 | }\r | |
255 | \r | |
256 | DevicePathNode = DevicePath;\r | |
257 | while (!IsDevicePathEnd (DevicePathNode)) {\r | |
258 | //\r | |
259 | // Do not allow checking for UDF file systems in CDROM "El Torito"\r | |
260 | // partitions, and skip duplicate installation of UDF file system child\r | |
261 | // nodes.\r | |
262 | //\r | |
263 | if (DevicePathType (DevicePathNode) == MEDIA_DEVICE_PATH) {\r | |
264 | if (DevicePathSubType (DevicePathNode) == MEDIA_CDROM_DP) {\r | |
265 | return EFI_NOT_FOUND;\r | |
266 | }\r | |
267 | if (DevicePathSubType (DevicePathNode) == MEDIA_VENDOR_DP) {\r | |
268 | VendorDefinedGuid = (EFI_GUID *)((UINTN)DevicePathNode +\r | |
269 | OFFSET_OF (VENDOR_DEVICE_PATH, Guid));\r | |
270 | if (CompareGuid (VendorDefinedGuid, &UdfDevPathGuid)) {\r | |
271 | return EFI_NOT_FOUND;\r | |
272 | }\r | |
273 | }\r | |
274 | }\r | |
275 | //\r | |
276 | // Try next device path node\r | |
277 | //\r | |
278 | DevicePathNode = NextDevicePathNode (DevicePathNode);\r | |
279 | }\r | |
280 | \r | |
281 | //\r | |
282 | // Check if block device supports an UDF file system\r | |
283 | //\r | |
284 | Status = SupportUdfFileSystem (BlockIo, DiskIo);\r | |
285 | if (EFI_ERROR (Status)) {\r | |
286 | return EFI_NOT_FOUND;\r | |
287 | }\r | |
288 | \r | |
289 | //\r | |
290 | // Create Partition Info protocol for UDF file system\r | |
291 | //\r | |
292 | ZeroMem (&PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));\r | |
293 | PartitionInfo.Revision = EFI_PARTITION_INFO_PROTOCOL_REVISION;\r | |
294 | PartitionInfo.Type = PARTITION_TYPE_OTHER;\r | |
295 | \r | |
296 | //\r | |
297 | // Install partition child handle for UDF file system\r | |
298 | //\r | |
299 | Status = PartitionInstallChildHandle (\r | |
300 | This,\r | |
301 | Handle,\r | |
302 | DiskIo,\r | |
303 | DiskIo2,\r | |
304 | BlockIo,\r | |
305 | BlockIo2,\r | |
306 | DevicePath,\r | |
307 | (EFI_DEVICE_PATH_PROTOCOL *)&gUdfDevicePath,\r | |
308 | &PartitionInfo,\r | |
309 | 0,\r | |
310 | Media->LastBlock,\r | |
311 | Media->BlockSize\r | |
312 | );\r | |
313 | if (!EFI_ERROR (Status)) {\r | |
314 | Status = EFI_NOT_FOUND;\r | |
315 | }\r | |
316 | \r | |
317 | return Status;\r | |
318 | }\r |