mirror of https://github.com/acidanthera/audk.git
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
/** @file
|
|
FUSE_FLUSH wrapper for the Virtio Filesystem device.
|
|
|
|
Copyright (C) 2020, Red Hat, Inc.
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
**/
|
|
|
|
#include "VirtioFsDxe.h"
|
|
|
|
/**
|
|
Flush changes queued on the local virtualization host to the remote storage
|
|
server's memory (not storage device), over the network, by sending the
|
|
FUSE_FLUSH 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_FLUSH
|
|
request to. On output, the FUSE request counter
|
|
"VirtioFs->RequestId" will have been incremented.
|
|
|
|
@param[in] NodeId The inode number of the regular file to flush.
|
|
|
|
@param[in] FuseHandle The open handle to the regular file to flush.
|
|
|
|
@retval EFI_SUCCESS The regular file has been flushed.
|
|
|
|
@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
|
|
VirtioFsFuseFlush (
|
|
IN OUT VIRTIO_FS *VirtioFs,
|
|
IN UINT64 NodeId,
|
|
IN UINT64 FuseHandle
|
|
)
|
|
{
|
|
VIRTIO_FS_FUSE_REQUEST CommonReq;
|
|
VIRTIO_FS_FUSE_FLUSH_REQUEST FlushReq;
|
|
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 = &FlushReq;
|
|
ReqIoVec[1].Size = sizeof FlushReq;
|
|
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,
|
|
VirtioFsFuseOpFlush,
|
|
NodeId
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
//
|
|
// Populate the FUSE_FLUSH-specific fields.
|
|
//
|
|
FlushReq.FileHandle = FuseHandle;
|
|
FlushReq.Unused = 0;
|
|
FlushReq.Padding = 0;
|
|
FlushReq.LockOwner = 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 "
|
|
"Errno=%d\n",
|
|
__FUNCTION__,
|
|
VirtioFs->Label,
|
|
NodeId,
|
|
FuseHandle,
|
|
CommonResp.Error
|
|
));
|
|
Status = VirtioFsErrnoToEfiStatus (CommonResp.Error);
|
|
}
|
|
|
|
return Status;
|
|
}
|