+ VIRTIO_FS_FILE *VirtioFsFile;\r
+ VIRTIO_FS *VirtioFs;\r
+ EFI_STATUS Status;\r
+ VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE FuseAttr;\r
+\r
+ VirtioFsFile = VIRTIO_FS_FILE_FROM_SIMPLE_FILE (This);\r
+\r
+ //\r
+ // Directories can only be rewound, per spec.\r
+ //\r
+ if (VirtioFsFile->IsDirectory) {\r
+ if (Position != 0) {\r
+ return EFI_UNSUPPORTED;\r
+ }\r
+ VirtioFsFile->FilePosition = 0;\r
+ return EFI_SUCCESS;\r
+ }\r
+\r
+ //\r
+ // Regular file.\r
+ //\r
+ if (Position < MAX_UINT64) {\r
+ //\r
+ // Caller is requesting absolute file position.\r
+ //\r
+ VirtioFsFile->FilePosition = Position;\r
+ return EFI_SUCCESS;\r
+ }\r
+\r
+ //\r
+ // Caller is requesting a seek to EOF.\r
+ //\r
+ VirtioFs = VirtioFsFile->OwnerFs;\r
+ Status = VirtioFsFuseGetAttr (VirtioFs, VirtioFsFile->NodeId, &FuseAttr);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ VirtioFsFile->FilePosition = FuseAttr.Size;\r
+ return EFI_SUCCESS;\r