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/*
TODO Description
*/
#include <stdio.h>
#include <Uefi.h>
#include <Library/UefiLib.h>
#include <Library/UefiApplicationEntryPoint.h>
#include <Include/Guid/FileSystemInfo.h>
EFI_STATUS efiStatus;
EFI_BOOT_SERVICES* bs;
EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *Console;
EFI_GUID sfspGuid = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
EFI_HANDLE* handleBuffer = NULL;
EFI_HANDLE* handleBuffer2 = NULL; // TODO remove
UINTN handleCount = 0;
UINTN handleCount2 = 0;
UINTN handleIndex;
EFI_GUID **ProtocolGuidArray;
UINTN ArrayCount;
UINTN ProtocolIndex;
EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfo;
UINTN OpenInfoIndex;
UINTN OpenInfoCount;
void printFileSystemInfo(EFI_FILE_SYSTEM_INFO* fileSystemInfo) {
Print(L"fileSystemInfo pointer %p\n", fileSystemInfo);
CHAR16* volumeLabel = fileSystemInfo->VolumeLabel;
Print(L"VolumeLabel: %a\n", volumeLabel);
Print(L"Size of volume Label: %d\n", sizeof(fileSystemInfo->VolumeLabel));
Print(L"Size: %d\n", fileSystemInfo->Size);
Print(L"ReadOnly: %d\n", fileSystemInfo->ReadOnly);
Print(L"VolumeSize: %d\n", fileSystemInfo->VolumeSize);
Print(L"FreeSpace: %d\n", fileSystemInfo->FreeSpace);
Print(L"BlockSize: %d\n", fileSystemInfo->BlockSize);
}
void printFileContent(UINTN fileSize, CHAR16* fileBuffer) {
Print(L"File Size: %d\n", fileSize);
Print(L"File Content: %a\n", fileBuffer);
}
void checkStatus(EFI_STATUS es, char *msg) {
if (es != EFI_SUCCESS) {
Print(L"Point of failure: %a\n", msg);
Print(L"Exit with status: %r\n", es);
Exit(1);
}
}
BOOLEAN compareGuids(EFI_GUID* sfspGuid, EFI_GUID* guid) {
if (guid->Data1 == sfspGuid->Data1 && guid->Data2 == sfspGuid->Data2 && guid->Data3 == sfspGuid->Data3
&& guid->Data4[0] == sfspGuid->Data4[0] && guid->Data4[1] == sfspGuid->Data4[1]
&& guid->Data4[2] == sfspGuid->Data4[2] && guid->Data4[3] == sfspGuid->Data4[3]
&& guid->Data4[4] == sfspGuid->Data4[4] && guid->Data4[5] == sfspGuid->Data4[5]
&& guid->Data4[6] == sfspGuid->Data4[6] && guid->Data4[7] == sfspGuid->Data4[7]) {
Print(L"GUID: %x-%x-%x-%x-%x-%x-%x-%x-%x-%x-%x\n",
guid->Data1, guid->Data2, guid->Data3,
guid->Data4[0], guid->Data4[1], guid->Data4[2], guid->Data4[3],
guid->Data4[4], guid->Data4[5], guid->Data4[6], guid->Data4[7]);
return TRUE;
}
return FALSE;
}
EFI_STATUS
EFIAPI
UefiMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
bs = SystemTable->BootServices;
Console = SystemTable->ConOut;
//
// Get all Handles
//
efiStatus = bs->LocateHandleBuffer (
AllHandles,
NULL,
NULL,
&handleCount,
&handleBuffer
);
checkStatus(efiStatus, "LocateHandleBuffer");
for (handleIndex = 0; handleIndex < handleCount; handleIndex++) {
//
// Retrieve the list of all the protocols on each handle
//
efiStatus = bs->ProtocolsPerHandle (
handleBuffer[handleIndex],
&ProtocolGuidArray,
&ArrayCount
);
checkStatus(efiStatus, "ProtocolsPerHandle");
//
// Search for protocol with EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID
//
for (ProtocolIndex = 0; ProtocolIndex < ArrayCount; ProtocolIndex++) {
EFI_GUID *guid = ProtocolGuidArray[ProtocolIndex];
if (compareGuids(&sfspGuid, guid)) {
//
// Retrieve the protocol instance for each protocol
//
efiStatus = bs->OpenProtocol (
handleBuffer[handleIndex],
ProtocolGuidArray[ProtocolIndex],
NULL,
ImageHandle,
NULL,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
checkStatus(efiStatus, "OpenProtocol");
//
// Retrieve the list of agents that have opened each protocol
//
efiStatus = bs->OpenProtocolInformation (
handleBuffer[handleIndex],
ProtocolGuidArray[ProtocolIndex],
&OpenInfo,
&OpenInfoCount // Number of agents that have opened the protocol
);
checkStatus(efiStatus, "OpenProtocolInformation");
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL* fs = NULL;
efiStatus = bs->HandleProtocol( // TODO Should use OpenProtocol() in new implementations
handleBuffer[handleIndex],
&sfspGuid,
(void**)&fs
);
checkStatus(efiStatus, "HandleProtocol");
EFI_FILE_PROTOCOL* root = NULL;
efiStatus = fs->OpenVolume(fs, &root);
checkStatus(efiStatus, "OpenVolume");
EFI_GUID fsiGuid = EFI_FILE_SYSTEM_INFO_ID;
UINTN bufSize = 0;
EFI_FILE_SYSTEM_INFO* fileSystemInfo = NULL;
// First time it is expected to fail
efiStatus = root->GetInfo(
root,
&fsiGuid,
&bufSize,
&fileSystemInfo);
efiStatus = bs->AllocatePool(EfiLoaderData, (UINTN) (bufSize) , (void **)&fileSystemInfo);
checkStatus(efiStatus, "AllocatePool");
efiStatus = root->GetInfo(
root,
&fsiGuid,
&bufSize,
fileSystemInfo);
checkStatus(efiStatus, "GetInfo");
//printFileSystemInfo(fileSystemInfo);
// TODO first check if it is the right filesystem. If yes, leave the for loop
EFI_FILE_PROTOCOL* token = NULL;
efiStatus = root->Open(
root,
&token,
L"log",
EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE,
0);
checkStatus(efiStatus, "Open");
UINTN fileSize = 500; // TODO get the actual size
CHAR16* fileBuffer = NULL;
efiStatus = bs->AllocatePool(EfiLoaderData, (UINTN) (fileSize) , (void **)&fileBuffer);
checkStatus(efiStatus, "AllocatePool for file");
efiStatus = token->Read(token, &fileSize, fileBuffer);
checkStatus(efiStatus, "Read");
printFileContent(fileSize, fileBuffer);
UINT64 currPos;
efiStatus = token->GetPosition(token, &currPos);
checkStatus(efiStatus, "GetPosition");
Print(L"Current File Position: %d\n", currPos);
char *message = "\nAdding a new line";
UINTN length = 19;
Print(L"Lengh: %d\n", length);
token->SetPosition(token, fileSize - 1);
efiStatus = token->Write(token, &length, message);
checkStatus(efiStatus, "Write");
fileSize += length;
token->SetPosition(token, 0);
efiStatus = token->Read(token, &fileSize, fileBuffer);
printFileContent(fileSize, fileBuffer);
} // end if (compareGuids(&sfspGuid, guid))
} // end for (ProtocolIndex = 0; ProtocolIndex < ArrayCount; ProtocolIndex++)
/*
efiStatus = bs->FreePool((void **)&buffer);
Print(L"efiStatus after FreePool: %r\n", efiStatus);*/
if (!EFI_ERROR (efiStatus)) {
for (OpenInfoIndex=0; OpenInfoIndex < OpenInfoCount; OpenInfoIndex++) {
//
// HandleBuffer[handleIndex] is the handle
// ProtocolGuidArray[ProtocolIndex] is the protocol GUID
// Instance is the protocol instance for the protocol
// OpenInfo[OpenInfoIndex] is an agent that has opened a protocol
//
}
/*if (OpenInfo != NULL) { // TODO Why is it crashing when using FreePool?
bs->FreePool(OpenInfo);
Print(L"EFI_STATUS after FreePool(OpenInfo): %r\n", efiStatus);
}*/
}
/*if (ProtocolGuidArray != NULL) {
bs->FreePool(ProtocolGuidArray);
Print(L"EFI_STATUS after FreePool(ProtocolGuidArray): %r\n", efiStatus);
}*/
} // end "for (handleIndex = 0; handleIndex < handleCount; handleIndex++)"
/*if (handleBuffer != NULL) {
efiStatus = bs->FreePool(handleBuffer);
Print(L"EFI_STATUS after FreePool(handleBuffer): %r\n", efiStatus);
}*/
efiStatus = bs->LocateHandleBuffer(ByProtocol,
&sfspGuid,
NULL,
&handleCount2,
&handleBuffer2);
Print(L"Handle count: %d\n", handleCount2);
return EFI_SUCCESS;
}
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