mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-01 12:53:27 +01:00
71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
|
/** @file
|
||
|
|
EFI_FILE_PROTOCOL.SetPosition() member function for the Virtio Filesystem
|
||
|
|
driver.
|
||
|
|
|
||
|
|
Copyright (C) 2020, Red Hat, Inc.
|
||
|
|
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
**/
|
||
|
|
|
||
|
|
#include <Library/MemoryAllocationLib.h> // FreePool()
|
||
|
|
|
||
|
|
#include "VirtioFsDxe.h"
|
||
|
|
|
||
|
|
EFI_STATUS
|
||
|
|
EFIAPI
|
||
|
|
VirtioFsSimpleFileSetPosition (
|
||
|
|
IN EFI_FILE_PROTOCOL *This,
|
||
|
|
IN UINT64 Position
|
||
|
|
)
|
||
|
|
{
|
||
|
|
VIRTIO_FS_FILE *VirtioFsFile;
|
||
|
|
VIRTIO_FS *VirtioFs;
|
||
|
|
EFI_STATUS Status;
|
||
|
|
VIRTIO_FS_FUSE_ATTRIBUTES_RESPONSE FuseAttr;
|
||
|
|
|
||
|
|
VirtioFsFile = VIRTIO_FS_FILE_FROM_SIMPLE_FILE (This);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Directories can only be rewound, per spec.
|
||
|
|
//
|
||
|
|
if (VirtioFsFile->IsDirectory) {
|
||
|
|
if (Position != 0) {
|
||
|
|
return EFI_UNSUPPORTED;
|
||
|
|
}
|
||
|
|
|
||
|
|
VirtioFsFile->FilePosition = 0;
|
||
|
|
if (VirtioFsFile->FileInfoArray != NULL) {
|
||
|
|
FreePool (VirtioFsFile->FileInfoArray);
|
||
|
|
VirtioFsFile->FileInfoArray = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
VirtioFsFile->SingleFileInfoSize = 0;
|
||
|
|
VirtioFsFile->NumFileInfo = 0;
|
||
|
|
VirtioFsFile->NextFileInfo = 0;
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Regular file.
|
||
|
|
//
|
||
|
|
if (Position < MAX_UINT64) {
|
||
|
|
//
|
||
|
|
// Caller is requesting absolute file position.
|
||
|
|
//
|
||
|
|
VirtioFsFile->FilePosition = Position;
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Caller is requesting a seek to EOF.
|
||
|
|
//
|
||
|
|
VirtioFs = VirtioFsFile->OwnerFs;
|
||
|
|
Status = VirtioFsFuseGetAttr (VirtioFs, VirtioFsFile->NodeId, &FuseAttr);
|
||
|
|
if (EFI_ERROR (Status)) {
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
VirtioFsFile->FilePosition = FuseAttr.Size;
|
||
|
|
return EFI_SUCCESS;
|
||
|
|
}
|