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audk/EmulatorPkg/Win/Host/WinBlockIo.c

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/**@file
Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "WinHost.h"
#define WIN_NT_BLOCK_IO_PRIVATE_SIGNATURE SIGNATURE_32 ('N', 'T', 'b', 'k')
typedef struct {
UINTN Signature;
EMU_IO_THUNK_PROTOCOL *Thunk;
CHAR16 *FileName;
BOOLEAN Removable;
BOOLEAN Readonly;
HANDLE NtHandle;
UINT32 BlockSize;
EFI_BLOCK_IO_MEDIA *Media;
EMU_BLOCK_IO_PROTOCOL EmuBlockIo;
} WIN_NT_BLOCK_IO_PRIVATE;
#define WIN_NT_BLOCK_IO_PRIVATE_DATA_FROM_THIS(a) \
CR(a, WIN_NT_BLOCK_IO_PRIVATE, EmuBlockIo, WIN_NT_BLOCK_IO_PRIVATE_SIGNATURE)
EFI_STATUS
WinNtBlockIoReset (
IN EMU_BLOCK_IO_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
);
EFI_STATUS
SetFilePointer64 (
IN WIN_NT_BLOCK_IO_PRIVATE *Private,
IN INT64 DistanceToMove,
OUT UINT64 *NewFilePointer,
IN DWORD MoveMethod
)
/*++
This function extends the capability of SetFilePointer to accept 64 bit parameters
--*/
{
EFI_STATUS Status;
LARGE_INTEGER LargeInt;
LargeInt.QuadPart = DistanceToMove;
Status = EFI_SUCCESS;
LargeInt.LowPart = SetFilePointer (
Private->NtHandle,
LargeInt.LowPart,
&LargeInt.HighPart,
MoveMethod
);
if ((LargeInt.LowPart == -1) && (GetLastError () != NO_ERROR)) {
Status = EFI_INVALID_PARAMETER;
}
if (NewFilePointer != NULL) {
*NewFilePointer = LargeInt.QuadPart;
}
return Status;
}
EFI_STATUS
WinNtBlockIoOpenDevice (
IN WIN_NT_BLOCK_IO_PRIVATE *Private,
IN EFI_BLOCK_IO_MEDIA *Media
)
{
EFI_STATUS Status;
UINT64 FileSize;
//
// If the device is already opened, close it
//
if (Private->NtHandle != INVALID_HANDLE_VALUE) {
WinNtBlockIoReset (&Private->EmuBlockIo, FALSE);
}
//
// Open the device
//
Private->NtHandle = CreateFile (
Private->FileName,
GENERIC_READ | (Private->Readonly ? 0 : GENERIC_WRITE),
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_ALWAYS, // Create if it doesn't exist
0,
NULL
);
if (Private->NtHandle == INVALID_HANDLE_VALUE) {
DEBUG ((DEBUG_INFO, "OpenBlock: Could not open %S, %x\n", Private->FileName, GetLastError ()));
Media->MediaPresent = FALSE;
Status = EFI_NO_MEDIA;
goto Done;
}
//
// get the size of the file
//
Status = SetFilePointer64 (Private, 0, &FileSize, FILE_END);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "OpenBlock: Could not get filesize of %s\n", Private->FileName));
Status = EFI_UNSUPPORTED;
goto Done;
}
Media->LastBlock = DivU64x32 (FileSize, (UINT32)Private->BlockSize) - 1;
DEBUG ((DEBUG_INIT, "OpenBlock: opened %S\n", Private->FileName));
Status = EFI_SUCCESS;
Done:
if (EFI_ERROR (Status)) {
if (Private->NtHandle != INVALID_HANDLE_VALUE) {
WinNtBlockIoReset (&Private->EmuBlockIo, FALSE);
}
}
return Status;
}
EFI_STATUS
EFIAPI
WinNtBlockIoCreateMapping (
IN EMU_BLOCK_IO_PROTOCOL *This,
IN EFI_BLOCK_IO_MEDIA *Media
)
{
WIN_NT_BLOCK_IO_PRIVATE *Private;
Private = WIN_NT_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);
Media->MediaId = 0;
Media->RemovableMedia = Private->Removable;
Media->MediaPresent = TRUE;
Media->LogicalPartition = FALSE;
Media->ReadOnly = Private->Readonly;
Media->WriteCaching = FALSE;
Media->IoAlign = 1;
Media->LastBlock = 0; // Filled in by OpenDevice
Media->BlockSize = Private->BlockSize;
// EFI_BLOCK_IO_PROTOCOL_REVISION2
Media->LowestAlignedLba = 0;
Media->LogicalBlocksPerPhysicalBlock = 0;
// EFI_BLOCK_IO_PROTOCOL_REVISION3
Media->OptimalTransferLengthGranularity = 0;
//
// Remember the Media pointer.
//
Private->Media = Media;
return WinNtBlockIoOpenDevice (Private, Media);
}
EFI_STATUS
WinNtBlockIoError (
IN WIN_NT_BLOCK_IO_PRIVATE *Private
)
/*++
Routine Description:
TODO: Add function description
Arguments:
Private - TODO: add argument description
Returns:
TODO: add return values
--*/
{
EFI_BLOCK_IO_MEDIA *Media;
EFI_STATUS Status;
Media = Private->Media;
switch (GetLastError ()) {
case ERROR_NOT_READY:
Media->ReadOnly = FALSE;
Media->MediaPresent = FALSE;
Status = EFI_NO_MEDIA;
break;
case ERROR_WRONG_DISK:
Media->ReadOnly = FALSE;
Media->MediaPresent = TRUE;
Media->MediaId++;
Status = EFI_MEDIA_CHANGED;
break;
case ERROR_WRITE_PROTECT:
Media->ReadOnly = TRUE;
Status = EFI_WRITE_PROTECTED;
break;
default:
Status = EFI_DEVICE_ERROR;
break;
}
if ((Status == EFI_NO_MEDIA) || (Status == EFI_MEDIA_CHANGED)) {
WinNtBlockIoReset (&Private->EmuBlockIo, FALSE);
}
return Status;
}
EFI_STATUS
WinNtSignalToken (
IN OUT EFI_BLOCK_IO2_TOKEN *Token,
IN EFI_STATUS Status
)
{
if (Token != NULL) {
if (Token->Event != NULL) {
// Caller is responcible for signaling EFI Event
Token->TransactionStatus = Status;
return EFI_SUCCESS;
}
}
return Status;
}
/**
Read BufferSize bytes from Lba into Buffer.
This function reads the requested number of blocks from the device. All the
blocks are read, or an error is returned.
If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and
non-blocking I/O is being used, the Event associated with this request will
not be signaled.
@param[in] This Indicates a pointer to the calling context.
@param[in] MediaId Id of the media, changes every time the media is
replaced.
@param[in] Lba The starting Logical Block Address to read from.
@param[in, out] Token A pointer to the token associated with the transaction.
@param[in] BufferSize Size of Buffer, must be a multiple of device block size.
@param[out] Buffer A pointer to the destination buffer for the data. The
caller is responsible for either having implicit or
explicit ownership of the buffer.
@retval EFI_SUCCESS The read request was queued if Token->Event is
not NULL.The data was read correctly from the
device if the Token->Event is NULL.
@retval EFI_DEVICE_ERROR The device reported an error while performing
the read.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the
intrinsic block size of the device.
@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
or the buffer is not on proper alignment.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
of resources.
**/
EFI_STATUS
WinNtBlockIoReadBlocks (
IN EMU_BLOCK_IO_PROTOCOL *This,
IN UINT32 MediaId,
IN EFI_LBA Lba,
IN OUT EFI_BLOCK_IO2_TOKEN *Token,
IN UINTN BufferSize,
OUT VOID *Buffer
)
{
WIN_NT_BLOCK_IO_PRIVATE *Private;
BOOL Flag;
EFI_STATUS Status;
DWORD BytesRead;
UINT64 DistanceToMove;
UINT64 DistanceMoved;
Private = WIN_NT_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);
//
// Seek to proper position
//
DistanceToMove = MultU64x32 (Lba, (UINT32)Private->BlockSize);
Status = SetFilePointer64 (Private, DistanceToMove, &DistanceMoved, FILE_BEGIN);
if (EFI_ERROR (Status) || (DistanceToMove != DistanceMoved)) {
DEBUG ((DEBUG_INIT, "ReadBlocks: SetFilePointer failed\n"));
return WinNtBlockIoError (Private->Media);
}
Flag = ReadFile (Private->NtHandle, Buffer, (DWORD)BufferSize, (LPDWORD)&BytesRead, NULL);
if (!Flag || (BytesRead != BufferSize)) {
return WinNtBlockIoError (Private->Media);
}
Private->Media->MediaPresent = TRUE;
return WinNtSignalToken (Token, EFI_SUCCESS);
}
/**
Write BufferSize bytes from Lba into Buffer.
This function writes the requested number of blocks to the device. All blocks
are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,
EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is
being used, the Event associated with this request will not be signaled.
@param[in] This Indicates a pointer to the calling context.
@param[in] MediaId The media ID that the write request is for.
@param[in] Lba The starting logical block address to be written. The
caller is responsible for writing to only legitimate
locations.
@param[in, out] Token A pointer to the token associated with the transaction.
@param[in] BufferSize Size of Buffer, must be a multiple of device block size.
@param[in] Buffer A pointer to the source buffer for the data.
@retval EFI_SUCCESS The write request was queued if Event is not NULL.
The data was written correctly to the device if
the Event is NULL.
@retval EFI_WRITE_PROTECTED The device can not be written to.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId does not match the current device.
@retval EFI_DEVICE_ERROR The device reported an error while performing the write.
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
@retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
or the buffer is not on proper alignment.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
of resources.
**/
EFI_STATUS
WinNtBlockIoWriteBlocks (
IN EMU_BLOCK_IO_PROTOCOL *This,
IN UINT32 MediaId,
IN EFI_LBA Lba,
IN OUT EFI_BLOCK_IO2_TOKEN *Token,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
WIN_NT_BLOCK_IO_PRIVATE *Private;
UINTN BytesWritten;
BOOL Success;
EFI_STATUS Status;
UINT64 DistanceToMove;
UINT64 DistanceMoved;
Private = WIN_NT_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);
//
// Seek to proper position
//
DistanceToMove = MultU64x32 (Lba, (UINT32)Private->BlockSize);
Status = SetFilePointer64 (Private, DistanceToMove, &DistanceMoved, FILE_BEGIN);
if (EFI_ERROR (Status) || (DistanceToMove != DistanceMoved)) {
DEBUG ((DEBUG_INIT, "WriteBlocks: SetFilePointer failed\n"));
return WinNtBlockIoError (Private->Media);
}
Success = WriteFile (Private->NtHandle, Buffer, (DWORD)BufferSize, (LPDWORD)&BytesWritten, NULL);
if (!Success || (BytesWritten != BufferSize)) {
return WinNtBlockIoError (Private->Media);
}
//
// If the write succeeded, we are not write protected and media is present.
//
Private->Media->MediaPresent = TRUE;
Private->Media->ReadOnly = FALSE;
return WinNtSignalToken (Token, EFI_SUCCESS);
}
/**
Flush the Block Device.
If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED
is returned and non-blocking I/O is being used, the Event associated with
this request will not be signaled.
@param[in] This Indicates a pointer to the calling context.
@param[in,out] Token A pointer to the token associated with the transaction
@retval EFI_SUCCESS The flush request was queued if Event is not NULL.
All outstanding data was written correctly to the
device if the Event is NULL.
@retval EFI_DEVICE_ERROR The device reported an error while writing back
the data.
@retval EFI_WRITE_PROTECTED The device cannot be written to.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
of resources.
**/
EFI_STATUS
WinNtBlockIoFlushBlocks (
IN EMU_BLOCK_IO_PROTOCOL *This,
IN OUT EFI_BLOCK_IO2_TOKEN *Token
)
{
return WinNtSignalToken (Token, EFI_SUCCESS);
}
/**
Reset the block device hardware.
@param[in] This Indicates a pointer to the calling context.
@param[in] ExtendedVerification Indicates that the driver may perform a more
exhausive verfication operation of the device
during reset.
@retval EFI_SUCCESS The device was reset.
@retval EFI_DEVICE_ERROR The device is not functioning properly and could
not be reset.
**/
EFI_STATUS
WinNtBlockIoReset (
IN EMU_BLOCK_IO_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
)
{
WIN_NT_BLOCK_IO_PRIVATE *Private;
Private = WIN_NT_BLOCK_IO_PRIVATE_DATA_FROM_THIS (This);
if (Private->NtHandle != INVALID_HANDLE_VALUE) {
CloseHandle (Private->NtHandle);
Private->NtHandle = INVALID_HANDLE_VALUE;
}
return EFI_SUCCESS;
}
EMU_BLOCK_IO_PROTOCOL gEmuBlockIoProtocol = {
WinNtBlockIoReset,
WinNtBlockIoReadBlocks,
WinNtBlockIoWriteBlocks,
WinNtBlockIoFlushBlocks,
WinNtBlockIoCreateMapping
};
EFI_STATUS
EFIAPI
WinNtBlockIoThunkOpen (
IN EMU_IO_THUNK_PROTOCOL *This
)
{
WIN_NT_BLOCK_IO_PRIVATE *Private;
CHAR16 *Str;
Private = AllocatePool (sizeof (*Private));
if (Private == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Private->Signature = WIN_NT_BLOCK_IO_PRIVATE_SIGNATURE;
Private->Thunk = This;
CopyMem (&Private->EmuBlockIo, &gEmuBlockIoProtocol, sizeof (gEmuBlockIoProtocol));
Private->BlockSize = 512;
Private->NtHandle = INVALID_HANDLE_VALUE;
Private->FileName = AllocateCopyPool (StrSize (This->ConfigString), This->ConfigString);
if (Private->FileName == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Parse ConfigString
// <ConfigString> := <FileName> ':' [RF][OW] ':' <BlockSize>
//
Str = StrStr (Private->FileName, L":");
if (Str == NULL) {
Private->Removable = FALSE;
Private->Readonly = FALSE;
} else {
for (*Str++ = L'\0'; *Str != L'\0'; Str++) {
if ((*Str == 'R') || (*Str == 'F')) {
Private->Removable = (BOOLEAN)(*Str == L'R');
}
if ((*Str == 'O') || (*Str == 'W')) {
Private->Readonly = (BOOLEAN)(*Str == L'O');
}
if (*Str == ':') {
Private->BlockSize = wcstol (++Str, NULL, 0);
break;
}
}
}
This->Interface = &Private->EmuBlockIo;
This->Private = Private;
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
WinNtBlockIoThunkClose (
IN EMU_IO_THUNK_PROTOCOL *This
)
{
WIN_NT_BLOCK_IO_PRIVATE *Private;
Private = This->Private;
if (Private != NULL) {
if (Private->FileName != NULL) {
FreePool (Private->FileName);
}
FreePool (Private);
}
return EFI_SUCCESS;
}
EMU_IO_THUNK_PROTOCOL mWinNtBlockIoThunkIo = {
&gEmuBlockIoProtocolGuid,
NULL,
NULL,
0,
WinNtBlockIoThunkOpen,
WinNtBlockIoThunkClose,
NULL
};
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