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CloverBootloader/FileSystems/VBoxFsDxe/fsw_efi.c
SergeySlice 01f33f7552 detect unknown linux versions, 
stylish change: remove space between func and brace

Signed-off-by: SergeySlice <sergey.slice@gmail.com>
2020-04-23 12:08:10 +03:00

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/* $Id: fsw_efi.c 29125 2010-05-06 09:43:05Z vboxsync $ */
/** @file
* fsw_efi.c - EFI host environment code.
*/
/*
* Copyright (C) 2010-2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*-
* This code is based on:
*
* Copyright (c) 2006 Christoph Pfisterer
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Christoph Pfisterer nor the names of the
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "fsw_efi.h"
#define DEBUG_LEVEL 0
#ifndef FSTYPE
#ifdef VBOX
#error FSTYPE must be defined!
#else
#define FSTYPE ext2
#endif
#endif
#define DEBUG_VBFS 0
CHAR8 *msgCursor;
MESSAGE_LOG_PROTOCOL *Msg = NULL;
#if DEBUG_VBFS==2
#define DBG(...) AsciiPrint(__VA_ARGS__)
#elif DEBUG_VBFS==1
#define DBG(...) BootLog(__VA_ARGS__)
#else
#define DBG(...)
#endif
/** Helper macro for stringification. */
#define FSW_EFI_STRINGIFY(x) L ## #x
/** Expands to the EFI driver name given the file system type name. */
#define FSW_EFI_DRIVER_NAME(t) L"Clover " FSW_EFI_STRINGIFY(t) L" File System Driver"
// function prototypes
EFI_STATUS EFIAPI fsw_efi_DriverBinding_Supported(IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath);
EFI_STATUS EFIAPI fsw_efi_DriverBinding_Start(IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath);
EFI_STATUS EFIAPI fsw_efi_DriverBinding_Stop(IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer);
EFI_STATUS EFIAPI fsw_efi_ComponentName_GetDriverName(IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN CHAR8 *Language,
OUT CHAR16 **DriverName);
EFI_STATUS EFIAPI fsw_efi_ComponentName_GetControllerName(IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle OPTIONAL,
IN CHAR8 *Language,
OUT CHAR16 **ControllerName);
void fsw_efi_change_blocksize(struct fsw_volume *vol,
fsw_u32 old_phys_blocksize, fsw_u32 old_log_blocksize,
fsw_u32 new_phys_blocksize, fsw_u32 new_log_blocksize);
fsw_status_t fsw_efi_read_block(struct fsw_volume *vol, fsw_u32 phys_bno, void *buffer);
EFI_STATUS fsw_efi_map_status(fsw_status_t fsw_status, FSW_VOLUME_DATA *Volume);
EFI_STATUS EFIAPI fsw_efi_FileSystem_OpenVolume(IN EFI_FILE_IO_INTERFACE *This,
OUT EFI_FILE_PROTOCOL **Root);
EFI_STATUS fsw_efi_dnode_to_FileHandle(IN struct fsw_dnode *dno,
OUT EFI_FILE_PROTOCOL **NewFileHandle);
EFI_STATUS fsw_efi_file_read(IN FSW_FILE_DATA *File,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer);
EFI_STATUS fsw_efi_file_getpos(IN FSW_FILE_DATA *File,
OUT UINT64 *Position);
EFI_STATUS fsw_efi_file_setpos(IN FSW_FILE_DATA *File,
IN UINT64 Position);
EFI_STATUS fsw_efi_dir_open(IN FSW_FILE_DATA *File,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes);
EFI_STATUS fsw_efi_dir_read(IN FSW_FILE_DATA *File,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer);
EFI_STATUS fsw_efi_dir_setpos(IN FSW_FILE_DATA *File,
IN UINT64 Position);
EFI_STATUS fsw_efi_dnode_getinfo(IN FSW_FILE_DATA *File,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer);
EFI_STATUS fsw_efi_dnode_fill_FileInfo(IN FSW_VOLUME_DATA *Volume,
IN struct fsw_dnode *dno,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer);
/**
* Interface structure for the EFI Driver Binding protocol.
*/
EFI_DRIVER_BINDING_PROTOCOL fsw_efi_DriverBinding_table = {
fsw_efi_DriverBinding_Supported,
fsw_efi_DriverBinding_Start,
fsw_efi_DriverBinding_Stop,
0x00,
NULL,
NULL
};
/**
* Interface structure for the EFI Component Name protocol.
*/
EFI_COMPONENT_NAME_PROTOCOL fsw_efi_ComponentName_table = {
fsw_efi_ComponentName_GetDriverName,
fsw_efi_ComponentName_GetControllerName,
"eng"
};
GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME2_PROTOCOL
fsw_efi_ComponentName2_table = {
(EFI_COMPONENT_NAME2_GET_DRIVER_NAME) fsw_efi_ComponentName_GetDriverName,
(EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME)
fsw_efi_ComponentName_GetControllerName,
"en"
};
EFI_LOCK fsw_efi_Lock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_CALLBACK);
/**
* Dispatch table for our FSW host driver.
*/
struct fsw_host_table fsw_efi_host_table = {
FSW_STRING_TYPE_UTF16,
fsw_efi_change_blocksize,
fsw_efi_read_block
};
extern struct fsw_fstype_table FSW_FSTYPE_TABLE_NAME (
FSTYPE
);
EFI_STATUS
fsw_efi_AcquireLockOrFail (
VOID
)
{
return EfiAcquireLockOrFail (&fsw_efi_Lock);
}
VOID
fsw_efi_ReleaseLock (
VOID
)
{
EfiReleaseLock (&fsw_efi_Lock);
}
/**
* Image entry point. Installs the Driver Binding and Component Name protocols
* on the image's handle. Actually mounting a file system is initiated through
* the Driver Binding protocol at the firmware's request.
*/
EFI_STATUS EFIAPI fsw_efi_main(IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable)
{
EFI_STATUS Status;
#ifndef VBOX
InitializeLib(ImageHandle, SystemTable);
#endif
// complete Driver Binding protocol instance
fsw_efi_DriverBinding_table.ImageHandle = ImageHandle;
fsw_efi_DriverBinding_table.DriverBindingHandle = ImageHandle;
// install Driver Binding protocol
Status = BS->InstallProtocolInterface(&fsw_efi_DriverBinding_table.DriverBindingHandle, &PROTO_NAME(DriverBindingProtocol), EFI_NATIVE_INTERFACE, &fsw_efi_DriverBinding_table);
if (EFI_ERROR(Status)) {
return Status;
}
// install Component Name 2 protocol
Status = BS->InstallProtocolInterface(&fsw_efi_DriverBinding_table.DriverBindingHandle,
&PROTO_NAME(ComponentName2Protocol), EFI_NATIVE_INTERFACE, &fsw_efi_ComponentName_table);
if (EFI_ERROR(Status)) {
// Print(L"Failed to install Component Name 2 Protocol\n");
}
// install Component Name protocol
Status = BS->InstallProtocolInterface(&fsw_efi_DriverBinding_table.DriverBindingHandle, &PROTO_NAME(ComponentNameProtocol), EFI_NATIVE_INTERFACE, &fsw_efi_ComponentName_table);
if (EFI_ERROR(Status)) {
return Status;
}
// OverrideFunctions();
/* Msg = NULL;
msgCursor = NULL;
Status = BS->LocateProtocol(&gMsgLogProtocolGuid, NULL, (VOID **) &Msg);
if (!EFI_ERROR(Status) && (Msg != NULL)) {
msgCursor = Msg->Cursor;
BootLog("MsgLog installed into VBoxFs\n");
}
*/
return EFI_SUCCESS;
}
/**
* Driver Binding EFI protocol, Supported function. This function is called by EFI
* to test if this driver can handle a certain device. Our implementation only checks
* if the device is a disk (i.e. that it supports the Block I/O and Disk I/O protocols)
* and implicitly checks if the disk is already in use by another driver.
*/
EFI_STATUS EFIAPI fsw_efi_DriverBinding_Supported(IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath)
{
EFI_STATUS Status;
EFI_DISK_IO_PROTOCOL *DiskIo;
EFI_DISK_IO2_PROTOCOL *DiskIo2;
// we check for both DiskIO and BlockIO protocols
// both V1 and V2
// first, open DiskIO2
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(DiskIo2Protocol),
(VOID **) &DiskIo2,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER);
if (EFI_ERROR(Status))
{
DiskIo2 = NULL;
}
BS->CloseProtocol(ControllerHandle,
&PROTO_NAME(DiskIo2Protocol),
This->DriverBindingHandle,
ControllerHandle);
// next, open DiskIO
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(DiskIoProtocol),
(VOID **) &DiskIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER);
if (EFI_ERROR(Status))
return Status;
// we were just checking, close it again
BS->CloseProtocol(ControllerHandle,
&PROTO_NAME(DiskIoProtocol),
This->DriverBindingHandle,
ControllerHandle);
// next, check BlockIO2 without actually opening it
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(BlockIo2Protocol),
NULL,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL);
// next, check BlockIO without actually opening it
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(BlockIoProtocol),
NULL,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL);
return Status;
}
/**
* Driver Binding EFI protocol, Start function. This function is called by EFI
* to start driving the given device. It is still possible at this point to
* return EFI_UNSUPPORTED, and in fact we will do so if the file system driver
* cannot find the superblock signature (or equivalent) that it expects.
*
* This function allocates memory for a per-volume structure, opens the
* required protocols (just Disk I/O in our case, Block I/O is only looked
* at to get the MediaId field), and lets the FSW core mount the file system.
* If successful, an EFI Simple File System protocol is exported on the
* device handle.
*/
EFI_STATUS EFIAPI fsw_efi_DriverBinding_Start(IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath)
{
EFI_STATUS Status;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
EFI_BLOCK_IO2_PROTOCOL *BlockIo2;
EFI_DISK_IO_PROTOCOL *DiskIo;
EFI_DISK_IO2_PROTOCOL *DiskIo2;
FSW_VOLUME_DATA *Volume;
#if DEBUG_LEVEL
// Print(L"fsw_efi_DriverBinding_Start\n");
#endif
// open consumed protocols
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(BlockIo2Protocol),
(VOID **) &BlockIo2,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(Status)) {
BlockIo2 = NULL;
}
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(BlockIoProtocol),
(VOID **) &BlockIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL); // NOTE: we only want to look at the MediaId
if ((BlockIo2 == NULL) && EFI_ERROR(Status)) {
// Print(L"Fsw ERROR: OpenProtocol(BlockIo) returned %x\n", Status);
return Status;
}
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(DiskIo2Protocol),
(VOID **) &DiskIo2,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER);
if (EFI_ERROR(Status)) {
DiskIo2 = NULL;
}
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(DiskIoProtocol),
(VOID **) &DiskIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER);
if ((DiskIo2 == NULL) && EFI_ERROR(Status)) {
// DBG("Fsw ERROR: OpenProtocol(DiskIo) returned %r\n", Status);
return Status;
}
// allocate volume structure
Volume = AllocateZeroPool(sizeof(FSW_VOLUME_DATA));
Volume->Signature = FSW_VOLUME_DATA_SIGNATURE;
Volume->Handle = ControllerHandle;
Volume->DiskIo = DiskIo;
Volume->DiskIo2 = DiskIo2;
Volume->LastIOStatus = EFI_SUCCESS;
if (BlockIo2 != NULL) {
Volume->MediaId = BlockIo2->Media->MediaId;
} else {
Volume->MediaId = BlockIo->Media->MediaId;
}
// mount the filesystem
Status = fsw_efi_map_status(fsw_mount(Volume, &fsw_efi_host_table,
&FSW_FSTYPE_TABLE_NAME(FSTYPE), &Volume->vol),
Volume);
if (!EFI_ERROR(Status)) {
// register the SimpleFileSystem protocol
Volume->FileSystem.Revision = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION;
Volume->FileSystem.OpenVolume = fsw_efi_FileSystem_OpenVolume;
Status = BS->InstallMultipleProtocolInterfaces(
&ControllerHandle,
&PROTO_NAME(SimpleFileSystemProtocol),
&Volume->FileSystem,
NULL);
if (EFI_ERROR(Status)) {
// Print(L"Fsw ERROR: InstallMultipleProtocolInterfaces returned %x\n", Status);
}
}
// on errors, close the opened protocols
if (EFI_ERROR(Status)) {
if (Volume->vol != NULL)
fsw_unmount(Volume->vol);
FreePool(Volume);
BS->CloseProtocol(ControllerHandle,
&PROTO_NAME(DiskIo2Protocol),
This->DriverBindingHandle,
ControllerHandle);
BS->CloseProtocol(ControllerHandle,
&PROTO_NAME(DiskIoProtocol),
This->DriverBindingHandle,
ControllerHandle);
}
return Status;
}
/**
* Driver Binding EFI protocol, Stop function. This function is called by EFI
* to stop the driver on the given device. This translates to an unmount
* call for the FSW core.
*
* We assume that all file handles on the volume have been closed before
* the driver is stopped. At least with the EFI shell, that is actually the
* case; it closes all file handles between commands.
*/
EFI_STATUS EFIAPI fsw_efi_DriverBinding_Stop(IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer)
{
EFI_STATUS Status;
EFI_FILE_IO_INTERFACE *FileSystem;
FSW_VOLUME_DATA *Volume;
#if DEBUG_LEVEL
// Print(L"fsw_efi_DriverBinding_Stop\n");
#endif
// get the installed SimpleFileSystem interface
Status = BS->OpenProtocol(ControllerHandle,
&PROTO_NAME(SimpleFileSystemProtocol),
(VOID **) &FileSystem,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(Status))
return EFI_UNSUPPORTED;
// get private data structure
Volume = FSW_VOLUME_FROM_FILE_SYSTEM(FileSystem);
// uninstall Simple File System protocol
Status = BS->UninstallMultipleProtocolInterfaces(ControllerHandle,
&PROTO_NAME(SimpleFileSystemProtocol), &Volume->FileSystem,
NULL);
if (EFI_ERROR(Status)) {
// Print(L"Fsw ERROR: UninstallMultipleProtocolInterfaces returned %x\n", Status);
return Status;
}
#if DEBUG_LEVEL
// Print(L"fsw_efi_DriverBinding_Stop: protocol uninstalled successfully\n");
#endif
// release private data structure
if (Volume->vol != NULL)
fsw_unmount(Volume->vol);
FreePool(Volume);
Status = BS->CloseProtocol(ControllerHandle,
&PROTO_NAME(DiskIo2Protocol),
This->DriverBindingHandle,
ControllerHandle);
// close the consumed protocols
Status = BS->CloseProtocol(ControllerHandle,
&PROTO_NAME(DiskIoProtocol),
This->DriverBindingHandle,
ControllerHandle);
return Status;
}
/**
* Component Name EFI protocol, GetDriverName function. Used by the EFI
* environment to inquire the name of this driver. The name returned is
* based on the file system type actually used in compilation.
*/
EFI_STATUS EFIAPI fsw_efi_ComponentName_GetDriverName(IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN CHAR8 *Language,
OUT CHAR16 **DriverName)
{
if (Language == NULL || DriverName == NULL)
return EFI_INVALID_PARAMETER;
//#if 0
*DriverName = FSW_EFI_DRIVER_NAME(FSTYPE);
return EFI_SUCCESS;
}
/**
* Component Name EFI protocol, GetControllerName function. Not implemented
* because this is not a "bus" driver in the sense of the EFI Driver Model.
*/
EFI_STATUS EFIAPI fsw_efi_ComponentName_GetControllerName(IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle OPTIONAL,
IN CHAR8 *Language,
OUT CHAR16 **ControllerName)
{
return EFI_UNSUPPORTED;
}
/**
* FSW interface function for block size changes. This function is called by the FSW core
* when the file system driver changes the block sizes for the volume.
*/
void fsw_efi_change_blocksize(struct fsw_volume *vol,
fsw_u32 old_phys_blocksize, fsw_u32 old_log_blocksize,
fsw_u32 new_phys_blocksize, fsw_u32 new_log_blocksize)
{
// nothing to do
}
/**
* FSW interface function to read data blocks. This function is called by the FSW core
* to read a block of data from the device. The buffer is allocated by the core code.
*/
fsw_status_t fsw_efi_read_block(struct fsw_volume *vol, fsw_u32 phys_bno, void *buffer)
{
EFI_STATUS Status;
FSW_VOLUME_DATA *Volume = (FSW_VOLUME_DATA *)vol->host_data;
// FSW_MSG_DEBUGV((FSW_MSGSTR("fsw_efi_read_block: %d (%d)\n"), phys_bno, vol->phys_blocksize));
// read from disk
if (Volume->DiskIo2 != NULL)
{
Status = Volume->DiskIo2->ReadDiskEx(Volume->DiskIo2, Volume->MediaId, (UINT64)phys_bno * vol->phys_blocksize, &(Volume->DiskIo2Token), vol->phys_blocksize, buffer);
} else {
Status = Volume->DiskIo->ReadDisk(Volume->DiskIo, Volume->MediaId,
(UINT64)phys_bno * vol->phys_blocksize,
vol->phys_blocksize,
buffer);
}
Volume->LastIOStatus = Status;
if (EFI_ERROR(Status))
return FSW_IO_ERROR;
return FSW_SUCCESS;
}
/**
* Map FSW status codes to EFI status codes. The FSW_IO_ERROR code is only produced
* by fsw_efi_read_block, so we map it back to the EFI status code remembered from
* the last I/O operation.
*/
EFI_STATUS fsw_efi_map_status(fsw_status_t fsw_status, FSW_VOLUME_DATA *Volume)
{
switch (fsw_status) {
case FSW_SUCCESS:
return EFI_SUCCESS;
case FSW_OUT_OF_MEMORY:
return EFI_VOLUME_CORRUPTED;
case FSW_IO_ERROR:
return Volume->LastIOStatus;
case FSW_UNSUPPORTED:
return EFI_UNSUPPORTED;
case FSW_NOT_FOUND:
return EFI_NOT_FOUND;
case FSW_VOLUME_CORRUPTED:
return EFI_VOLUME_CORRUPTED;
default:
return EFI_DEVICE_ERROR;
}
}
/**
* File System EFI protocol, OpenVolume function. Creates a file handle for
* the root directory and returns it. Note that this function may be called
* multiple times and returns a new file handle each time. Each returned
* handle is closed by the client using it.
*/
EFI_STATUS EFIAPI fsw_efi_FileSystem_OpenVolume(IN EFI_FILE_IO_INTERFACE *This,
OUT EFI_FILE_PROTOCOL **Root)
{
EFI_STATUS Status;
FSW_VOLUME_DATA *Volume = FSW_VOLUME_FROM_FILE_SYSTEM(This);
#if DEBUG_LEVEL
// Print(L"fsw_efi_FileSystem_OpenVolume\n");
#endif
Status = fsw_efi_dnode_to_FileHandle(Volume->vol->root, Root);
return Status;
}
/**
* File Handle EFI protocol, Open function. Dispatches the call
* based on the kind of file handle.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_Open(IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes)
{
FSW_FILE_DATA *File = FSW_FILE_FROM_FILE_HANDLE(This);
if (File->Type == FSW_EFI_FILE_TYPE_DIR)
return fsw_efi_dir_open(File, NewHandle, FileName, OpenMode, Attributes);
// not supported for regular files
return EFI_UNSUPPORTED;
}
EFI_STATUS EFIAPI fsw_efi_FileHandle_OpenEx(IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes,
IN OUT EFI_FILE_IO_TOKEN *Token)
{
return fsw_efi_FileHandle_Open(This, NewHandle, FileName, OpenMode, Attributes);
}
/**
* File Handle EFI protocol, Close function. Closes the FSW shandle
* and frees the memory used for the structure.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_Close(IN EFI_FILE_PROTOCOL *This)
{
FSW_FILE_DATA *File = FSW_FILE_FROM_FILE_HANDLE(This);
#if DEBUG_LEVEL
// Print(L"fsw_efi_FileHandle_Close\n");
#endif
fsw_shandle_close(&File->shand);
FreePool(File);
return EFI_SUCCESS;
}
/**
* File Handle EFI protocol, Delete function. Calls through to Close
* and returns a warning because this driver is read-only.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_Delete(IN EFI_FILE_PROTOCOL *This)
{
EFI_STATUS Status;
Status = This->Close(This);
if (Status == EFI_SUCCESS) {
// this driver is read-only
Status = EFI_WARN_DELETE_FAILURE;
}
return Status;
}
/**
* File Handle EFI protocol, Read function. Dispatches the call
* based on the kind of file handle.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_Read(IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer)
{
FSW_FILE_DATA *File = FSW_FILE_FROM_FILE_HANDLE(This);
if (File->Type == FSW_EFI_FILE_TYPE_FILE)
return fsw_efi_file_read(File, BufferSize, Buffer);
else if (File->Type == FSW_EFI_FILE_TYPE_DIR)
return fsw_efi_dir_read(File, BufferSize, Buffer);
return EFI_UNSUPPORTED;
}
EFI_STATUS EFIAPI fsw_efi_FileHandle_ReadEx(IN EFI_FILE_PROTOCOL *This,
IN OUT EFI_FILE_IO_TOKEN *Token)
{
return fsw_efi_FileHandle_Read(This, &Token->BufferSize, Token->Buffer);
};
/**
* File Handle EFI protocol, Write function. Returns unsupported status
* because this driver is read-only.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_Write(IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer)
{
// this driver is read-only
return EFI_WRITE_PROTECTED;
}
EFI_STATUS EFIAPI fsw_efi_FileHandle_WriteEx(IN EFI_FILE_PROTOCOL *This,
IN OUT EFI_FILE_IO_TOKEN *Token)
{
return fsw_efi_FileHandle_Write(This, &Token->BufferSize, Token->Buffer);
}
/**
* File Handle EFI protocol, GetPosition function. Dispatches the call
* based on the kind of file handle.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_GetPosition(IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position)
{
FSW_FILE_DATA *File = FSW_FILE_FROM_FILE_HANDLE(This);
if (File->Type == FSW_EFI_FILE_TYPE_FILE)
return fsw_efi_file_getpos(File, Position);
// not defined for directories
return EFI_UNSUPPORTED;
}
/**
* File Handle EFI protocol, SetPosition function. Dispatches the call
* based on the kind of file handle.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_SetPosition(IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position)
{
FSW_FILE_DATA *File = FSW_FILE_FROM_FILE_HANDLE(This);
if (File->Type == FSW_EFI_FILE_TYPE_FILE)
return fsw_efi_file_setpos(File, Position);
else if (File->Type == FSW_EFI_FILE_TYPE_DIR)
return fsw_efi_dir_setpos(File, Position);
return EFI_UNSUPPORTED;
}
/**
* File Handle EFI protocol, GetInfo function. Dispatches to the common
* function implementing this.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_GetInfo(IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer)
{
FSW_FILE_DATA *File = FSW_FILE_FROM_FILE_HANDLE(This);
return fsw_efi_dnode_getinfo(File, InformationType, BufferSize, Buffer);
}
/**
* File Handle EFI protocol, SetInfo function. Returns unsupported status
* because this driver is read-only.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_SetInfo(IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer)
{
// this driver is read-only
return EFI_WRITE_PROTECTED;
}
/**
* File Handle EFI protocol, Flush function. Returns unsupported status
* because this driver is read-only.
*/
EFI_STATUS EFIAPI fsw_efi_FileHandle_Flush(IN EFI_FILE_PROTOCOL *This)
{
// this driver is read-only
return EFI_WRITE_PROTECTED;
}
EFI_STATUS EFIAPI fsw_efi_FileHandle_FlushEx(IN EFI_FILE_PROTOCOL *This, IN OUT EFI_FILE_IO_TOKEN *Token)
{
return fsw_efi_FileHandle_Flush(This);
}
/**
* Set up a file handle for a dnode. This function allocates a data structure
* for a file handle, opens a FSW shandle and populates the EFI_FILE_PROTOCOL structure
* with the interface functions.
*/
EFI_STATUS fsw_efi_dnode_to_FileHandle(IN struct fsw_dnode *dno,
OUT EFI_FILE_PROTOCOL **NewFileHandle)
{
EFI_STATUS Status;
FSW_FILE_DATA *File;
// make sure the dnode has complete info
Status = fsw_efi_map_status(fsw_dnode_fill(dno), (FSW_VOLUME_DATA *)dno->vol->host_data);
if (EFI_ERROR(Status))
return Status;
// check type
if (dno->type != FSW_DNODE_TYPE_FILE && dno->type != FSW_DNODE_TYPE_DIR)
return EFI_UNSUPPORTED;
// allocate file structure
File = AllocateZeroPool(sizeof(FSW_FILE_DATA));
File->Signature = FSW_FILE_DATA_SIGNATURE;
if (dno->type == FSW_DNODE_TYPE_FILE)
File->Type = FSW_EFI_FILE_TYPE_FILE;
else if (dno->type == FSW_DNODE_TYPE_DIR)
File->Type = FSW_EFI_FILE_TYPE_DIR;
// open shandle
Status = fsw_efi_map_status(fsw_shandle_open(dno, &File->shand),
(FSW_VOLUME_DATA *)dno->vol->host_data);
if (EFI_ERROR(Status)) {
FreePool(File);
return Status;
}
// populate the file handle
File->FileHandle.Revision = EFI_FILE_HANDLE_REVISION;
File->FileHandle.Open = fsw_efi_FileHandle_Open;
File->FileHandle.Close = fsw_efi_FileHandle_Close;
File->FileHandle.Delete = fsw_efi_FileHandle_Delete;
File->FileHandle.Read = fsw_efi_FileHandle_Read;
File->FileHandle.Write = fsw_efi_FileHandle_Write;
File->FileHandle.GetPosition = fsw_efi_FileHandle_GetPosition;
File->FileHandle.SetPosition = fsw_efi_FileHandle_SetPosition;
File->FileHandle.GetInfo = fsw_efi_FileHandle_GetInfo;
File->FileHandle.SetInfo = fsw_efi_FileHandle_SetInfo;
File->FileHandle.Flush = fsw_efi_FileHandle_Flush;
File->FileHandle.OpenEx = fsw_efi_FileHandle_OpenEx;
File->FileHandle.ReadEx = fsw_efi_FileHandle_ReadEx;
File->FileHandle.WriteEx = fsw_efi_FileHandle_WriteEx;
File->FileHandle.FlushEx = fsw_efi_FileHandle_FlushEx;
*NewFileHandle = &File->FileHandle;
return EFI_SUCCESS;
}
/**
* Data read function for regular files. Calls through to fsw_shandle_read.
*/
EFI_STATUS fsw_efi_file_read(IN FSW_FILE_DATA *File,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer)
{
EFI_STATUS Status;
fsw_u32 buffer_size;
#if DEBUG_LEVEL
Print(L"fsw_efi_file_read %d bytes\n", *BufferSize);
#endif
buffer_size = (fsw_u32)*BufferSize;
Status = fsw_efi_map_status(fsw_shandle_read(&File->shand, &buffer_size, Buffer),
(FSW_VOLUME_DATA *)File->shand.dnode->vol->host_data);
*BufferSize = buffer_size;
return Status;
}
/**
* Get file position for regular files.
*/
EFI_STATUS fsw_efi_file_getpos(IN FSW_FILE_DATA *File,
OUT UINT64 *Position)
{
*Position = File->shand.pos;
return EFI_SUCCESS;
}
/**
* Set file position for regular files. EFI specifies the all-ones value
* to be a special value for the end of the file.
*/
EFI_STATUS fsw_efi_file_setpos(IN FSW_FILE_DATA *File,
IN UINT64 Position)
{
if (Position == 0xFFFFFFFFFFFFFFFFULL)
File->shand.pos = File->shand.dnode->size;
else
File->shand.pos = Position;
return EFI_SUCCESS;
}
/**
* Open function used to open new file handles relative to a directory.
* In EFI, the "open file" function is implemented by directory file handles
* and is passed a relative or volume-absolute path to the file or directory
* to open. We use fsw_dnode_lookup_path to find the node plus an additional
* call to fsw_dnode_resolve because EFI has no concept of symbolic links.
*/
EFI_STATUS fsw_efi_dir_open(IN FSW_FILE_DATA *File,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes)
{
EFI_STATUS Status;
FSW_VOLUME_DATA *Volume = (FSW_VOLUME_DATA *)File->shand.dnode->vol->host_data;
struct fsw_dnode *dno;
struct fsw_dnode *target_dno;
struct fsw_string lookup_path;
#if DEBUG_LEVEL
Print(L"fsw_efi_dir_open: '%s'\n", FileName);
#endif
if (OpenMode != EFI_FILE_MODE_READ)
return EFI_WRITE_PROTECTED;
lookup_path.type = FSW_STRING_TYPE_UTF16;
lookup_path.len = (int)StrLen(FileName);
lookup_path.size = lookup_path.len * sizeof(fsw_u16);
lookup_path.data = FileName;
// resolve the path (symlinks along the way are automatically resolved)
Status = fsw_efi_map_status(fsw_dnode_lookup_path(File->shand.dnode,
&lookup_path, '\\',
&dno),
Volume);
if (EFI_ERROR(Status))
return Status;
// if the final node is a symlink, also resolve it
Status = fsw_efi_map_status(fsw_dnode_resolve(dno, &target_dno),
Volume);
fsw_dnode_release(dno);
if (EFI_ERROR(Status))
return Status;
dno = target_dno;
// make a new EFI handle for the target dnode
Status = fsw_efi_dnode_to_FileHandle(dno, NewHandle);
fsw_dnode_release(dno);
return Status;
}
/**
* Read function for directories. A file handle read on a directory retrieves
* the next directory entry.
*/
EFI_STATUS fsw_efi_dir_read(IN FSW_FILE_DATA *File,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer)
{
EFI_STATUS Status;
FSW_VOLUME_DATA *Volume = (FSW_VOLUME_DATA *)File->shand.dnode->vol->host_data;
struct fsw_dnode *dno;
#if DEBUG_LEVEL
Print(L"fsw_efi_dir_read...\n");
#endif
// read the next entry
Status = fsw_efi_map_status(fsw_dnode_dir_read(&File->shand, &dno),
Volume);
if (Status == EFI_NOT_FOUND) {
// end of directory
*BufferSize = 0;
#if DEBUG_LEVEL
Print(L"...no more entries\n");
#endif
return EFI_SUCCESS;
}
if (EFI_ERROR(Status))
return Status;
// get info into buffer
Status = fsw_efi_dnode_fill_FileInfo(Volume, dno, BufferSize, Buffer);
fsw_dnode_release(dno);
return Status;
}
/**
* Set file position for directories. The only allowed set position operation
* for directories is to rewind the directory completely by setting the
* position to zero.
*/
EFI_STATUS fsw_efi_dir_setpos(IN FSW_FILE_DATA *File,
IN UINT64 Position)
{
if (Position == 0) {
File->shand.pos = 0;
return EFI_SUCCESS;
} else {
// directories can only rewind to the start
return EFI_UNSUPPORTED;
}
}
/**
* Get file or volume information. This function implements the GetInfo call
* for all file handles. Control is dispatched according to the type of information
* requested by the caller.
*/
EFI_STATUS fsw_efi_dnode_getinfo(IN FSW_FILE_DATA *File,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer)
{
EFI_STATUS Status;
FSW_VOLUME_DATA *Volume = (FSW_VOLUME_DATA *)File->shand.dnode->vol->host_data;
EFI_FILE_SYSTEM_INFO *FSInfo;
UINTN RequiredSize;
struct fsw_volume_stat vsb;
if (CompareGuid(InformationType, &GUID_NAME(FileInfo))) {
#if DEBUG_LEVEL
Print(L"fsw_efi_dnode_getinfo: FILE_INFO\n");
#endif
Status = fsw_efi_dnode_fill_FileInfo(Volume, File->shand.dnode, BufferSize, Buffer);
} else if (CompareGuid(InformationType, &GUID_NAME(FileSystemInfo))) {
#if DEBUG_LEVEL
Print(L"fsw_efi_dnode_getinfo: FILE_SYSTEM_INFO\n");
#endif
// check buffer size
RequiredSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + fsw_efi_strsize(&Volume->vol->label);
if (*BufferSize < RequiredSize) {
*BufferSize = RequiredSize;
return EFI_BUFFER_TOO_SMALL;
}
// fill structure
FSInfo = (EFI_FILE_SYSTEM_INFO *)Buffer;
FSInfo->Size = RequiredSize;
FSInfo->ReadOnly = TRUE;
FSInfo->BlockSize = Volume->vol->log_blocksize;
fsw_efi_strcpy(FSInfo->VolumeLabel, &Volume->vol->label);
// get the missing info from the fs driver
ZeroMem(&vsb, sizeof(struct fsw_volume_stat));
Status = fsw_efi_map_status(fsw_volume_stat(Volume->vol, &vsb), Volume);
if (EFI_ERROR(Status))
return Status;
FSInfo->VolumeSize = vsb.total_bytes;
FSInfo->FreeSpace = vsb.free_bytes;
// prepare for return
*BufferSize = RequiredSize;
Status = EFI_SUCCESS;
} else if (CompareGuid(InformationType, &GUID_NAME(FileSystemVolumeLabelInfoId))) {
#if DEBUG_LEVEL
Print(L"fsw_efi_dnode_getinfo: FILE_SYSTEM_VOLUME_LABEL\n");
#endif
// check buffer size
RequiredSize = SIZE_OF_EFI_FILE_SYSTEM_VOLUME_LABEL_INFO + fsw_efi_strsize(&Volume->vol->label);
if (*BufferSize < RequiredSize) {
*BufferSize = RequiredSize;
return EFI_BUFFER_TOO_SMALL;
}
// copy volume label
fsw_efi_strcpy(((EFI_FILE_SYSTEM_VOLUME_LABEL_INFO *)Buffer)->VolumeLabel, &Volume->vol->label);
// prepare for return
*BufferSize = RequiredSize;
Status = EFI_SUCCESS;
} else {
Status = EFI_UNSUPPORTED;
}
return Status;
}
/**
* Time mapping callback for the fsw_dnode_stat call. This function converts
* a Posix style timestamp into an EFI_TIME structure and writes it to the
* appropriate member of the EFI_FILE_INFO structure that we're filling.
*/
static void fsw_efi_store_time_posix(struct fsw_dnode_stat_str *sb, int which, fsw_u32 posix_time)
{
EFI_FILE_INFO *FileInfo = (EFI_FILE_INFO *)sb->host_data;
if (which == FSW_DNODE_STAT_CTIME)
fsw_efi_decode_time(&FileInfo->CreateTime, posix_time);
else if (which == FSW_DNODE_STAT_MTIME)
fsw_efi_decode_time(&FileInfo->ModificationTime, posix_time);
else if (which == FSW_DNODE_STAT_ATIME)
fsw_efi_decode_time(&FileInfo->LastAccessTime, posix_time);
}
/**
* Mode mapping callback for the fsw_dnode_stat call. This function looks at
* the Posix mode passed by the file system driver and makes appropriate
* adjustments to the EFI_FILE_INFO structure that we're filling.
*/
static void fsw_efi_store_attr_posix(struct fsw_dnode_stat_str *sb, fsw_u16 posix_mode)
{
EFI_FILE_INFO *FileInfo = (EFI_FILE_INFO *)sb->host_data;
if ((posix_mode & S_IWUSR) == 0)
FileInfo->Attribute |= EFI_FILE_READ_ONLY;
}
//
// Common function to fill an EFI_FILE_INFO with information about a dnode.
// there is caller responsible to allocate buffer
//
EFI_STATUS fsw_efi_dnode_fill_FileInfo(IN FSW_VOLUME_DATA *Volume,
IN struct fsw_dnode *dno,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer)
{
EFI_STATUS Status;
EFI_FILE_INFO *FileInfo;
UINTN RequiredSize;
struct fsw_dnode_stat_str sb;
struct fsw_dnode *target_dno;
// make sure the dnode has complete info
Status = fsw_efi_map_status(fsw_dnode_fill(dno), Volume);
if (EFI_ERROR(Status))
return Status;
// TODO: check/assert that the dno's name is in UTF16
// check buffer size
RequiredSize = SIZE_OF_EFI_FILE_INFO + fsw_efi_strsize(&dno->name);
if (*BufferSize < RequiredSize) {
// TODO: wind back the directory in this case
#if DEBUG_LEVEL
Print(L"...BUFFER TOO SMALL\n");
#endif
*BufferSize = RequiredSize;
return EFI_BUFFER_TOO_SMALL;
}
// fill structure
ZeroMem (Buffer, RequiredSize);
FileInfo = (EFI_FILE_INFO *) Buffer;
// Use original name (name of symlink if any)
fsw_efi_strcpy (FileInfo->FileName, &dno->name);
// if the node is a symlink, resolve it
Status = fsw_efi_map_status (fsw_dnode_resolve (dno, &target_dno), Volume);
fsw_dnode_release (dno);
if (EFI_ERROR(Status))
return Status;
dno = target_dno;
// make sure the dnode has complete info
Status = fsw_efi_map_status (fsw_dnode_fill (dno), Volume);
if (EFI_ERROR(Status))
return Status;
FileInfo->Size = RequiredSize;
FileInfo->FileSize = dno->size;
FileInfo->Attribute = EFI_FILE_READ_ONLY;
if (dno->type == FSW_DNODE_TYPE_DIR)
FileInfo->Attribute |= EFI_FILE_DIRECTORY;
// get the missing info from the fs driver
ZeroMem(&sb, sizeof(struct fsw_dnode_stat_str));
sb.store_time_posix = fsw_efi_store_time_posix;
sb.store_attr_posix = fsw_efi_store_attr_posix;
sb.host_data = FileInfo;
Status = fsw_efi_map_status(fsw_dnode_stat(dno, &sb), Volume);
if (EFI_ERROR(Status))
return Status;
FileInfo->PhysicalSize = sb.used_bytes;
// prepare for return
*BufferSize = RequiredSize;
#if DEBUG_LEVEL
Print(L"...returning '%s'\n", FileInfo->FileName);
#endif
return EFI_SUCCESS;
}
// EOF
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