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647340b0 LE |
1 | /** @file\r |
2 | FUSE_SETATTR wrapper for the Virtio Filesystem device.\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 | |
9 | #include "VirtioFsDxe.h"\r | |
10 | \r | |
11 | /**\r | |
12 | Send the FUSE_SETATTR request to the Virtio Filesystem device, for changing\r | |
13 | the attributes of an inode.\r | |
14 | \r | |
15 | The function may only be called after VirtioFsFuseInitSession() returns\r | |
16 | successfully and before VirtioFsUninit() is called.\r | |
17 | \r | |
18 | @param[in,out] VirtioFs The Virtio Filesystem device to send the\r | |
19 | FUSE_SETATTR request to. On output, the FUSE request\r | |
20 | counter "VirtioFs->RequestId" will have been\r | |
21 | incremented.\r | |
22 | \r | |
23 | @param[in] NodeId The inode number representing the regular file or\r | |
24 | directory whose attributes should be changed.\r | |
25 | \r | |
26 | @param[in] Size The new size to set for the regular file. If NULL,\r | |
27 | then the file size will not be changed. If NodeId\r | |
28 | refers to a directory, then the caller is\r | |
29 | responsible for passing NULL as Size.\r | |
30 | \r | |
31 | @param[in] Atime The new last access time to set for the regular file\r | |
32 | or directory (seconds since the Epoch). If NULL,\r | |
33 | then the last access time is not changed.\r | |
34 | \r | |
35 | @param[in] Mtime The new last modification time to set for the\r | |
36 | regular file or directory (seconds since the Epoch).\r | |
37 | If NULL, then the last modification time is not\r | |
38 | changed.\r | |
39 | \r | |
40 | @param[in] Mode The new file mode bits to set for the regular file\r | |
41 | or directory. If NULL, then the file mode bits are\r | |
42 | not changed.\r | |
43 | \r | |
44 | @retval EFI_SUCCESS The attributes have been updated.\r | |
45 | \r | |
46 | @return The "errno" value mapped to an EFI_STATUS code, if the\r | |
47 | Virtio Filesystem device explicitly reported an error.\r | |
48 | \r | |
49 | @return Error codes propagated from VirtioFsSgListsValidate(),\r | |
50 | VirtioFsFuseNewRequest(), VirtioFsSgListsSubmit(),\r | |
51 | VirtioFsFuseCheckResponse().\r | |
52 | **/\r | |
53 | EFI_STATUS\r | |
54 | VirtioFsFuseSetAttr (\r | |
ac0a286f MK |
55 | IN OUT VIRTIO_FS *VirtioFs,\r |
56 | IN UINT64 NodeId,\r | |
57 | IN UINT64 *Size OPTIONAL,\r | |
58 | IN UINT64 *Atime OPTIONAL,\r | |
59 | IN UINT64 *Mtime OPTIONAL,\r | |
60 | IN UINT32 *Mode OPTIONAL\r | |
647340b0 LE |
61 | )\r |
62 | {\r | |
ac0a286f MK |
63 | VIRTIO_FS_FUSE_REQUEST CommonReq;\r |
64 | VIRTIO_FS_FUSE_SETATTR_REQUEST AttrReq;\r | |
65 | VIRTIO_FS_IO_VECTOR ReqIoVec[2];\r | |
66 | VIRTIO_FS_SCATTER_GATHER_LIST ReqSgList;\r | |
67 | VIRTIO_FS_FUSE_RESPONSE CommonResp;\r | |
68 | VIRTIO_FS_FUSE_GETATTR_RESPONSE GetAttrResp;\r | |
69 | VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE AttrResp;\r | |
70 | VIRTIO_FS_IO_VECTOR RespIoVec[3];\r | |
71 | VIRTIO_FS_SCATTER_GATHER_LIST RespSgList;\r | |
72 | EFI_STATUS Status;\r | |
647340b0 LE |
73 | \r |
74 | //\r | |
75 | // Set up the scatter-gather lists.\r | |
76 | //\r | |
77 | ReqIoVec[0].Buffer = &CommonReq;\r | |
78 | ReqIoVec[0].Size = sizeof CommonReq;\r | |
79 | ReqIoVec[1].Buffer = &AttrReq;\r | |
80 | ReqIoVec[1].Size = sizeof AttrReq;\r | |
81 | ReqSgList.IoVec = ReqIoVec;\r | |
82 | ReqSgList.NumVec = ARRAY_SIZE (ReqIoVec);\r | |
83 | \r | |
84 | RespIoVec[0].Buffer = &CommonResp;\r | |
85 | RespIoVec[0].Size = sizeof CommonResp;\r | |
86 | RespIoVec[1].Buffer = &GetAttrResp;\r | |
87 | RespIoVec[1].Size = sizeof GetAttrResp;\r | |
88 | RespIoVec[2].Buffer = &AttrResp;\r | |
89 | RespIoVec[2].Size = sizeof AttrResp;\r | |
90 | RespSgList.IoVec = RespIoVec;\r | |
91 | RespSgList.NumVec = ARRAY_SIZE (RespIoVec);\r | |
92 | \r | |
93 | //\r | |
94 | // Validate the scatter-gather lists; calculate the total transfer sizes.\r | |
95 | //\r | |
96 | Status = VirtioFsSgListsValidate (VirtioFs, &ReqSgList, &RespSgList);\r | |
97 | if (EFI_ERROR (Status)) {\r | |
98 | return Status;\r | |
99 | }\r | |
100 | \r | |
101 | //\r | |
102 | // Populate the common request header.\r | |
103 | //\r | |
ac0a286f MK |
104 | Status = VirtioFsFuseNewRequest (\r |
105 | VirtioFs,\r | |
106 | &CommonReq,\r | |
107 | ReqSgList.TotalSize,\r | |
108 | VirtioFsFuseOpSetAttr,\r | |
109 | NodeId\r | |
110 | );\r | |
647340b0 LE |
111 | if (EFI_ERROR (Status)) {\r |
112 | return Status;\r | |
113 | }\r | |
114 | \r | |
115 | //\r | |
116 | // Populate the FUSE_SETATTR-specific fields.\r | |
117 | //\r | |
118 | AttrReq.Valid = 0;\r | |
119 | AttrReq.Padding = 0;\r | |
120 | AttrReq.FileHandle = 0;\r | |
121 | AttrReq.Size = (Size == NULL) ? 0 : *Size;\r | |
122 | AttrReq.LockOwner = 0;\r | |
123 | AttrReq.Atime = (Atime == NULL) ? 0 : *Atime;\r | |
124 | AttrReq.Mtime = (Mtime == NULL) ? 0 : *Mtime;\r | |
125 | AttrReq.Ctime = 0;\r | |
126 | AttrReq.AtimeNsec = 0;\r | |
127 | AttrReq.MtimeNsec = 0;\r | |
128 | AttrReq.CtimeNsec = 0;\r | |
129 | AttrReq.Mode = (Mode == NULL) ? 0 : *Mode;\r | |
130 | AttrReq.Unused4 = 0;\r | |
131 | AttrReq.Uid = 0;\r | |
132 | AttrReq.Gid = 0;\r | |
133 | AttrReq.Unused5 = 0;\r | |
134 | \r | |
135 | if (Size != NULL) {\r | |
136 | AttrReq.Valid |= VIRTIO_FS_FUSE_SETATTR_REQ_F_SIZE;\r | |
137 | }\r | |
ac0a286f | 138 | \r |
647340b0 LE |
139 | if (Atime != NULL) {\r |
140 | AttrReq.Valid |= VIRTIO_FS_FUSE_SETATTR_REQ_F_ATIME;\r | |
141 | }\r | |
ac0a286f | 142 | \r |
647340b0 LE |
143 | if (Mtime != NULL) {\r |
144 | AttrReq.Valid |= VIRTIO_FS_FUSE_SETATTR_REQ_F_MTIME;\r | |
145 | }\r | |
ac0a286f | 146 | \r |
647340b0 LE |
147 | if (Mode != NULL) {\r |
148 | AttrReq.Valid |= VIRTIO_FS_FUSE_SETATTR_REQ_F_MODE;\r | |
149 | }\r | |
150 | \r | |
151 | //\r | |
152 | // Submit the request.\r | |
153 | //\r | |
154 | Status = VirtioFsSgListsSubmit (VirtioFs, &ReqSgList, &RespSgList);\r | |
155 | if (EFI_ERROR (Status)) {\r | |
156 | return Status;\r | |
157 | }\r | |
158 | \r | |
159 | //\r | |
160 | // Verify the response (all response buffers are fixed size).\r | |
161 | //\r | |
162 | Status = VirtioFsFuseCheckResponse (&RespSgList, CommonReq.Unique, NULL);\r | |
163 | if (Status == EFI_DEVICE_ERROR) {\r | |
ac0a286f MK |
164 | DEBUG ((\r |
165 | DEBUG_ERROR,\r | |
166 | "%a: Label=\"%s\" NodeId=%Lu",\r | |
167 | __FUNCTION__,\r | |
168 | VirtioFs->Label,\r | |
169 | NodeId\r | |
170 | ));\r | |
647340b0 LE |
171 | if (Size != NULL) {\r |
172 | DEBUG ((DEBUG_ERROR, " Size=0x%Lx", *Size));\r | |
173 | }\r | |
ac0a286f | 174 | \r |
647340b0 LE |
175 | if (Atime != NULL) {\r |
176 | DEBUG ((DEBUG_ERROR, " Atime=%Lu", *Atime));\r | |
177 | }\r | |
ac0a286f | 178 | \r |
647340b0 LE |
179 | if (Mtime != NULL) {\r |
180 | DEBUG ((DEBUG_ERROR, " Mtime=%Lu", *Mtime));\r | |
181 | }\r | |
ac0a286f | 182 | \r |
647340b0 LE |
183 | if (Mode != NULL) {\r |
184 | DEBUG ((DEBUG_ERROR, " Mode=0x%x", *Mode)); // no support for octal :/\r | |
185 | }\r | |
ac0a286f MK |
186 | \r |
187 | DEBUG ((DEBUG_ERROR, " Errno=%d\n", CommonResp.Error));\r | |
647340b0 LE |
188 | Status = VirtioFsErrnoToEfiStatus (CommonResp.Error);\r |
189 | }\r | |
ac0a286f | 190 | \r |
647340b0 LE |
191 | return Status;\r |
192 | }\r |