/** @file | |
EFI_FILE_PROTOCOL.Close() member function for the Virtio Filesystem driver. | |
Copyright (C) 2020, Red Hat, Inc. | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include <Library/BaseLib.h> // RemoveEntryList() | |
#include <Library/MemoryAllocationLib.h> // FreePool() | |
#include "VirtioFsDxe.h" | |
EFI_STATUS | |
EFIAPI | |
VirtioFsSimpleFileClose ( | |
IN EFI_FILE_PROTOCOL *This | |
) | |
{ | |
VIRTIO_FS_FILE *VirtioFsFile; | |
VIRTIO_FS *VirtioFs; | |
VirtioFsFile = VIRTIO_FS_FILE_FROM_SIMPLE_FILE (This); | |
VirtioFs = VirtioFsFile->OwnerFs; | |
// | |
// All actions in this function are "best effort"; the UEFI spec requires | |
// EFI_FILE_PROTOCOL.Close() to sync all data to the device, but it also | |
// requires EFI_FILE_PROTOCOL.Close() to release resources unconditionally, | |
// and to return EFI_SUCCESS unconditionally. | |
// | |
// Flush, sync, release, and (if needed) forget. If any action fails, we | |
// still try the others. | |
// | |
if (VirtioFsFile->IsOpenForWriting) { | |
if (!VirtioFsFile->IsDirectory) { | |
VirtioFsFuseFlush ( | |
VirtioFs, | |
VirtioFsFile->NodeId, | |
VirtioFsFile->FuseHandle | |
); | |
} | |
VirtioFsFuseFsyncFileOrDir ( | |
VirtioFs, | |
VirtioFsFile->NodeId, | |
VirtioFsFile->FuseHandle, | |
VirtioFsFile->IsDirectory | |
); | |
} | |
VirtioFsFuseReleaseFileOrDir ( | |
VirtioFs, | |
VirtioFsFile->NodeId, | |
VirtioFsFile->FuseHandle, | |
VirtioFsFile->IsDirectory | |
); | |
// | |
// VirtioFsFile->FuseHandle is gone at this point, but VirtioFsFile->NodeId | |
// is still valid. If we've known VirtioFsFile->NodeId from a lookup, then | |
// now we should ask the server to forget it *once*. | |
// | |
if (VirtioFsFile->NodeId != VIRTIO_FS_FUSE_ROOT_DIR_NODE_ID) { | |
VirtioFsFuseForget (VirtioFs, VirtioFsFile->NodeId); | |
} | |
// | |
// One fewer file left open for the owner filesystem. | |
// | |
RemoveEntryList (&VirtioFsFile->OpenFilesEntry); | |
FreePool (VirtioFsFile->CanonicalPathname); | |
if (VirtioFsFile->FileInfoArray != NULL) { | |
FreePool (VirtioFsFile->FileInfoArray); | |
} | |
FreePool (VirtioFsFile); | |
return EFI_SUCCESS; | |
} |