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/** @file
FUSE_FSYNC / FUSE_FSYNCDIR wrapper for the Virtio Filesystem device.
Copyright (C) 2020, Red Hat, Inc.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "VirtioFsDxe.h"
/**
Synchronize the in-core state of a regular file or a directory with the
storage device on the host, by sending the FUSE_FSYNC or FUSE_FSYNCDIR
request to the Virtio Filesystem device.
The function may only be called after VirtioFsFuseInitSession() returns
successfully and before VirtioFsUninit() is called.
@param[in,out] VirtioFs The Virtio Filesystem device to send the FUSE_FSYNC
/ FUSE_FSYNCDIR request to. On output, the FUSE
request counter "VirtioFs->RequestId" will have been
incremented.
@param[in] NodeId The inode number of the file or directory to sync.
@param[in] FuseHandle The open handle to the file or directory to sync.
@param[in] IsDir TRUE if NodeId and FuseHandle refer to a directory,
FALSE if NodeId and FuseHandle refer to a regular
file.
@retval EFI_SUCCESS The file or directory has been synchronized.
@return The "errno" value mapped to an EFI_STATUS code, if the
Virtio Filesystem device explicitly reported an error.
@return Error codes propagated from VirtioFsSgListsValidate(),
VirtioFsFuseNewRequest(), VirtioFsSgListsSubmit(),
VirtioFsFuseCheckResponse().
**/
EFI_STATUS
VirtioFsFuseFsyncFileOrDir (
IN OUT VIRTIO_FS *VirtioFs,
IN UINT64 NodeId,
IN UINT64 FuseHandle,
IN BOOLEAN IsDir
)
{
VIRTIO_FS_FUSE_REQUEST CommonReq;
VIRTIO_FS_FUSE_FSYNC_REQUEST FsyncReq;
VIRTIO_FS_IO_VECTOR ReqIoVec[2];
VIRTIO_FS_SCATTER_GATHER_LIST ReqSgList;
VIRTIO_FS_FUSE_RESPONSE CommonResp;
VIRTIO_FS_IO_VECTOR RespIoVec[1];
VIRTIO_FS_SCATTER_GATHER_LIST RespSgList;
EFI_STATUS Status;
//
// Set up the scatter-gather lists.
//
ReqIoVec[0].Buffer = &CommonReq;
ReqIoVec[0].Size = sizeof CommonReq;
ReqIoVec[1].Buffer = &FsyncReq;
ReqIoVec[1].Size = sizeof FsyncReq;
ReqSgList.IoVec = ReqIoVec;
ReqSgList.NumVec = ARRAY_SIZE (ReqIoVec);
RespIoVec[0].Buffer = &CommonResp;
RespIoVec[0].Size = sizeof CommonResp;
RespSgList.IoVec = RespIoVec;
RespSgList.NumVec = ARRAY_SIZE (RespIoVec);
//
// Validate the scatter-gather lists; calculate the total transfer sizes.
//
Status = VirtioFsSgListsValidate (VirtioFs, &ReqSgList, &RespSgList);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Populate the common request header.
//
Status = VirtioFsFuseNewRequest (
VirtioFs,
&CommonReq,
ReqSgList.TotalSize,
IsDir ? VirtioFsFuseOpFsyncDir : VirtioFsFuseOpFsync,
NodeId
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Populate the FUSE_FSYNC- / FUSE_FSYNCDIR-specific fields.
//
FsyncReq.FileHandle = FuseHandle;
FsyncReq.FsyncFlags = 0;
FsyncReq.Padding = 0;
//
// Submit the request.
//
Status = VirtioFsSgListsSubmit (VirtioFs, &ReqSgList, &RespSgList);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Verify the response (all response buffers are fixed size).
//
Status = VirtioFsFuseCheckResponse (&RespSgList, CommonReq.Unique, NULL);
if (Status == EFI_DEVICE_ERROR) {
DEBUG ((
DEBUG_ERROR,
"%a: Label=\"%s\" NodeId=%Lu FuseHandle=%Lu "
"IsDir=%d Errno=%d\n",
__func__,
VirtioFs->Label,
NodeId,
FuseHandle,
IsDir,
CommonResp.Error
));
Status = VirtioFsErrnoToEfiStatus (CommonResp.Error);
}
return Status;
}
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