ac0a286f4d
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the OvmfPkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Andrew Fish <afish@apple.com>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/** @file
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EFI_FILE_PROTOCOL.Write() member function for the Virtio Filesystem driver.
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Copyright (C) 2020, Red Hat, Inc.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "VirtioFsDxe.h"
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EFI_STATUS
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EFIAPI
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VirtioFsSimpleFileWrite (
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IN EFI_FILE_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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IN VOID *Buffer
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)
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{
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VIRTIO_FS_FILE *VirtioFsFile;
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VIRTIO_FS *VirtioFs;
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EFI_STATUS Status;
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UINTN Transferred;
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UINTN Left;
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VirtioFsFile = VIRTIO_FS_FILE_FROM_SIMPLE_FILE (This);
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VirtioFs = VirtioFsFile->OwnerFs;
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if (VirtioFsFile->IsDirectory) {
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return EFI_UNSUPPORTED;
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}
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if (!VirtioFsFile->IsOpenForWriting) {
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return EFI_ACCESS_DENIED;
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}
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Status = EFI_SUCCESS;
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Transferred = 0;
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Left = *BufferSize;
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while (Left > 0) {
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UINT32 WriteSize;
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//
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// Honor the write buffer size limit.
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//
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WriteSize = (UINT32)MIN ((UINTN)VirtioFs->MaxWrite, Left);
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Status = VirtioFsFuseWrite (
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VirtioFs,
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VirtioFsFile->NodeId,
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VirtioFsFile->FuseHandle,
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VirtioFsFile->FilePosition + Transferred,
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&WriteSize,
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(UINT8 *)Buffer + Transferred
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);
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if (!EFI_ERROR (Status) && (WriteSize == 0)) {
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//
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// Progress should have been made.
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//
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Status = EFI_DEVICE_ERROR;
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}
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if (EFI_ERROR (Status)) {
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break;
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}
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Transferred += WriteSize;
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Left -= WriteSize;
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}
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*BufferSize = Transferred;
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VirtioFsFile->FilePosition += Transferred;
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//
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// According to the UEFI spec,
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//
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// - 'Partial writes only occur when there has been a data error during the
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// write attempt (such as "file space full")', and
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//
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// - (as an example) EFI_VOLUME_FULL is returned when 'The volume is full'.
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//
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// These together imply that after a partial write, we have to return an
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// error. In other words, (Transferred > 0) is inconsequential for the return
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// value.
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//
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return Status;
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}
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