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334c13e1 LE |
1 | /** @file\r |
2 | EFI_FILE_PROTOCOL.GetInfo() member function for the Virtio Filesystem driver.\r | |
3 | \r | |
4 | Copyright (C) 2020, Red Hat, Inc.\r | |
5 | \r | |
6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
7 | **/\r | |
8 | \r | |
b6b240f9 LE |
9 | #include <Guid/FileSystemInfo.h> // gEfiFileSystemInfoGuid\r |
10 | #include <Guid/FileSystemVolumeLabelInfo.h> // gEfiFileSystemVolumeLabelInfo...\r | |
11 | #include <Library/BaseLib.h> // StrSize()\r | |
12 | #include <Library/BaseMemoryLib.h> // CompareGuid()\r | |
13 | \r | |
334c13e1 LE |
14 | #include "VirtioFsDxe.h"\r |
15 | \r | |
b6b240f9 LE |
16 | /**\r |
17 | Provide EFI_FILE_INFO about this particular file.\r | |
18 | **/\r | |
19 | STATIC\r | |
20 | EFI_STATUS\r | |
21 | GetFileInfo (\r | |
22 | IN EFI_FILE_PROTOCOL *This,\r | |
23 | IN OUT UINTN *BufferSize,\r | |
24 | OUT VOID *Buffer\r | |
25 | )\r | |
26 | {\r | |
27 | VIRTIO_FS_FILE *VirtioFsFile;\r | |
28 | VIRTIO_FS *VirtioFs;\r | |
29 | UINTN AllocSize;\r | |
30 | UINTN BasenameSize;\r | |
31 | EFI_STATUS Status;\r | |
32 | EFI_FILE_INFO *FileInfo;\r | |
33 | VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE FuseAttr;\r | |
34 | \r | |
35 | VirtioFsFile = VIRTIO_FS_FILE_FROM_SIMPLE_FILE (This);\r | |
36 | VirtioFs = VirtioFsFile->OwnerFs;\r | |
37 | \r | |
38 | AllocSize = *BufferSize;\r | |
39 | \r | |
40 | //\r | |
41 | // Calculate the needed size.\r | |
42 | //\r | |
43 | BasenameSize = 0;\r | |
44 | Status = VirtioFsGetBasename (VirtioFsFile->CanonicalPathname, NULL,\r | |
45 | &BasenameSize);\r | |
46 | ASSERT (Status == EFI_BUFFER_TOO_SMALL);\r | |
47 | *BufferSize = OFFSET_OF (EFI_FILE_INFO, FileName) + BasenameSize;\r | |
48 | \r | |
49 | if (*BufferSize > AllocSize) {\r | |
50 | return EFI_BUFFER_TOO_SMALL;\r | |
51 | }\r | |
52 | \r | |
53 | //\r | |
54 | // Set the structure size, and store the basename.\r | |
55 | //\r | |
56 | FileInfo = Buffer;\r | |
57 | FileInfo->Size = *BufferSize;\r | |
58 | Status = VirtioFsGetBasename (VirtioFsFile->CanonicalPathname,\r | |
59 | FileInfo->FileName, &BasenameSize);\r | |
60 | ASSERT_EFI_ERROR (Status);\r | |
61 | \r | |
62 | //\r | |
63 | // Fetch the file attributes, and convert them into the caller's buffer.\r | |
64 | //\r | |
65 | Status = VirtioFsFuseGetAttr (VirtioFs, VirtioFsFile->NodeId, &FuseAttr);\r | |
66 | if (!EFI_ERROR (Status)) {\r | |
67 | Status = VirtioFsFuseAttrToEfiFileInfo (&FuseAttr, FileInfo);\r | |
68 | }\r | |
69 | return (Status == EFI_BUFFER_TOO_SMALL) ? EFI_DEVICE_ERROR : Status;\r | |
70 | }\r | |
71 | \r | |
72 | /**\r | |
73 | Provide EFI_FILE_SYSTEM_INFO about the filesystem this file lives on.\r | |
74 | **/\r | |
75 | STATIC\r | |
76 | EFI_STATUS\r | |
77 | GetFileSystemInfo (\r | |
78 | IN EFI_FILE_PROTOCOL *This,\r | |
79 | IN OUT UINTN *BufferSize,\r | |
80 | OUT VOID *Buffer\r | |
81 | )\r | |
82 | {\r | |
83 | VIRTIO_FS_FILE *VirtioFsFile;\r | |
84 | VIRTIO_FS *VirtioFs;\r | |
85 | UINTN AllocSize;\r | |
86 | UINTN LabelSize;\r | |
87 | EFI_STATUS Status;\r | |
88 | VIRTIO_FS_FUSE_STATFS_RESPONSE FilesysAttr;\r | |
89 | UINT64 MaxBlocks;\r | |
90 | EFI_FILE_SYSTEM_INFO *FilesysInfo;\r | |
91 | \r | |
92 | VirtioFsFile = VIRTIO_FS_FILE_FROM_SIMPLE_FILE (This);\r | |
93 | VirtioFs = VirtioFsFile->OwnerFs;\r | |
94 | \r | |
95 | AllocSize = *BufferSize;\r | |
96 | \r | |
97 | //\r | |
98 | // Calculate the needed size.\r | |
99 | //\r | |
100 | LabelSize = StrSize (VirtioFs->Label);\r | |
101 | *BufferSize = OFFSET_OF (EFI_FILE_SYSTEM_INFO, VolumeLabel) + LabelSize;\r | |
102 | \r | |
103 | if (*BufferSize > AllocSize) {\r | |
104 | return EFI_BUFFER_TOO_SMALL;\r | |
105 | }\r | |
106 | \r | |
107 | //\r | |
108 | // Fetch the filesystem attributes.\r | |
109 | //\r | |
110 | Status = VirtioFsFuseStatFs (VirtioFs, VirtioFsFile->NodeId, &FilesysAttr);\r | |
111 | if (EFI_ERROR (Status)) {\r | |
112 | return (Status == EFI_BUFFER_TOO_SMALL) ? EFI_DEVICE_ERROR : Status;\r | |
113 | }\r | |
114 | //\r | |
115 | // Sanity checks...\r | |
116 | //\r | |
117 | if (FilesysAttr.Frsize != FilesysAttr.Bsize) {\r | |
118 | return EFI_UNSUPPORTED;\r | |
119 | }\r | |
120 | if (FilesysAttr.Frsize == 0 || FilesysAttr.Blocks == 0 ||\r | |
121 | FilesysAttr.Bavail > FilesysAttr.Blocks) {\r | |
122 | return EFI_DEVICE_ERROR;\r | |
123 | }\r | |
124 | MaxBlocks = DivU64x32 (MAX_UINT64, FilesysAttr.Frsize);\r | |
125 | if (FilesysAttr.Blocks > MaxBlocks || FilesysAttr.Bavail > MaxBlocks) {\r | |
126 | return EFI_DEVICE_ERROR;\r | |
127 | }\r | |
128 | \r | |
129 | //\r | |
130 | // Fill in EFI_FILE_SYSTEM_INFO.\r | |
131 | //\r | |
132 | FilesysInfo = Buffer;\r | |
133 | FilesysInfo->Size = *BufferSize;\r | |
134 | FilesysInfo->ReadOnly = FALSE;\r | |
135 | FilesysInfo->VolumeSize = MultU64x32 (FilesysAttr.Blocks,\r | |
136 | FilesysAttr.Frsize);\r | |
137 | FilesysInfo->FreeSpace = MultU64x32 (FilesysAttr.Bavail,\r | |
138 | FilesysAttr.Frsize);\r | |
139 | FilesysInfo->BlockSize = FilesysAttr.Frsize;\r | |
140 | CopyMem (FilesysInfo->VolumeLabel, VirtioFs->Label, LabelSize);\r | |
141 | \r | |
142 | return EFI_SUCCESS;\r | |
143 | }\r | |
144 | \r | |
145 | /**\r | |
146 | Return the filesystem label as EFI_FILE_SYSTEM_VOLUME_LABEL.\r | |
147 | **/\r | |
148 | STATIC\r | |
149 | EFI_STATUS\r | |
150 | GetFileSystemVolumeLabelInfo (\r | |
151 | IN EFI_FILE_PROTOCOL *This,\r | |
152 | IN OUT UINTN *BufferSize,\r | |
153 | OUT VOID *Buffer\r | |
154 | )\r | |
155 | {\r | |
156 | VIRTIO_FS_FILE *VirtioFsFile;\r | |
157 | VIRTIO_FS *VirtioFs;\r | |
158 | UINTN AllocSize;\r | |
159 | UINTN LabelSize;\r | |
160 | EFI_FILE_SYSTEM_VOLUME_LABEL *FilesysVolumeLabel;\r | |
161 | \r | |
162 | VirtioFsFile = VIRTIO_FS_FILE_FROM_SIMPLE_FILE (This);\r | |
163 | VirtioFs = VirtioFsFile->OwnerFs;\r | |
164 | \r | |
165 | AllocSize = *BufferSize;\r | |
166 | \r | |
167 | //\r | |
168 | // Calculate the needed size.\r | |
169 | //\r | |
170 | LabelSize = StrSize (VirtioFs->Label);\r | |
171 | *BufferSize = (OFFSET_OF (EFI_FILE_SYSTEM_VOLUME_LABEL, VolumeLabel) +\r | |
172 | LabelSize);\r | |
173 | \r | |
174 | if (*BufferSize > AllocSize) {\r | |
175 | return EFI_BUFFER_TOO_SMALL;\r | |
176 | }\r | |
177 | \r | |
178 | //\r | |
179 | // Store the label.\r | |
180 | //\r | |
181 | FilesysVolumeLabel = Buffer;\r | |
182 | CopyMem (FilesysVolumeLabel->VolumeLabel, VirtioFs->Label, LabelSize);\r | |
183 | \r | |
184 | return EFI_SUCCESS;\r | |
185 | }\r | |
186 | \r | |
334c13e1 LE |
187 | EFI_STATUS\r |
188 | EFIAPI\r | |
189 | VirtioFsSimpleFileGetInfo (\r | |
190 | IN EFI_FILE_PROTOCOL *This,\r | |
191 | IN EFI_GUID *InformationType,\r | |
192 | IN OUT UINTN *BufferSize,\r | |
193 | OUT VOID *Buffer\r | |
194 | )\r | |
195 | {\r | |
b6b240f9 LE |
196 | if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {\r |
197 | return GetFileInfo (This, BufferSize, Buffer);\r | |
198 | }\r | |
199 | \r | |
200 | if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {\r | |
201 | return GetFileSystemInfo (This, BufferSize, Buffer);\r | |
202 | }\r | |
203 | \r | |
204 | if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {\r | |
205 | return GetFileSystemVolumeLabelInfo (This, BufferSize, Buffer);\r | |
206 | }\r | |
207 | \r | |
208 | return EFI_UNSUPPORTED;\r | |
334c13e1 | 209 | }\r |