OvmfPkg/BaseMemEncryptSevLib: skip the pre-validated system RAM

[mirror_edk2.git] / OvmfPkg / VirtioFsDxe / SimpleFsClose.c

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