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/** @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);
FreePool (VirtioFsFile);
return EFI_SUCCESS;
}
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