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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** FileX Component */
/** */
/** Fault Tolerant */
/** */
/**************************************************************************/
/**************************************************************************/
#define FX_SOURCE_CODE
#include "fx_api.h"
#include "fx_utility.h"
#include "fx_fault_tolerant.h"
#ifdef FX_ENABLE_FAULT_TOLERANT
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _fx_fault_tolerant_add_dir_log PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function converts directory entry write into log entry and add */
/* it into log file. */
/* */
/* INPUT */
/* */
/* media_ptr Media control block pointer */
/* logical_sector Original sector to write to */
/* offset Offset in original sector */
/* data Data of log */
/* data_size Size of data */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* _fx_utility_16_unsigned_write Write a USHORT from memory */
/* _fx_utility_32_unsigned_write Write a ULONG from memory */
/* _fx_utility_64_unsigned_write Write a ULONG64 from memory */
/* memcpy Memory Copy */
/* */
/* CALLED BY */
/* */
/* _fx_directory_entry_write */
/* _fx_directory_exFAT_unicode_entry_write */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 William E. Lamie Modified comment(s), verified */
/* memcpy usage, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _fx_fault_tolerant_add_dir_log(FX_MEDIA *media_ptr, ULONG64 logical_sector, ULONG offset,
UCHAR *data, ULONG data_size)
{
ULONG file_size;
FX_FAULT_TOLERANT_DIR_LOG *dir_log;
/* Increment the size of the log file. */
file_size = media_ptr -> fx_media_fault_tolerant_file_size + data_size + FX_FAULT_TOLERANT_DIR_LOG_ENTRY_SIZE;
/* Check whether log file exceeds the buffer. */
if (file_size > media_ptr -> fx_media_fault_tolerant_memory_buffer_size)
{
/* Log file exceeds the size of the log buffer. This is a failure. */
return(FX_NO_MORE_SPACE);
}
/* Any data to write? */
if (data_size == 0)
{
/* No. Just return. */
return FX_SUCCESS;
}
/* Set log pointer. */
dir_log = (FX_FAULT_TOLERANT_DIR_LOG *)(media_ptr -> fx_media_fault_tolerant_memory_buffer +
media_ptr -> fx_media_fault_tolerant_file_size);
/* Set log type. */
_fx_utility_16_unsigned_write((UCHAR *)&dir_log -> fx_fault_tolerant_dir_log_type,
FX_FAULT_TOLERANT_DIR_LOG_TYPE);
/* Size of log. */
_fx_utility_16_unsigned_write((UCHAR *)&dir_log -> fx_fault_tolerant_dir_log_size,
data_size + FX_FAULT_TOLERANT_DIR_LOG_ENTRY_SIZE);
/* Set sector and offset. */
_fx_utility_64_unsigned_write((UCHAR *)&dir_log -> fx_fault_tolerant_dir_log_sector, logical_sector);
_fx_utility_32_unsigned_write((UCHAR *)&dir_log -> fx_fault_tolerant_dir_log_offset, offset);
memcpy(media_ptr -> fx_media_fault_tolerant_memory_buffer + /* Use case of memcpy is verified. */
media_ptr -> fx_media_fault_tolerant_file_size + FX_FAULT_TOLERANT_DIR_LOG_ENTRY_SIZE,
data, data_size);
/* Update log information. */
media_ptr -> fx_media_fault_tolerant_file_size = (USHORT)file_size;
media_ptr -> fx_media_fault_tolerant_total_logs += 1;
return(FX_SUCCESS);
}
#endif /* FX_ENABLE_FAULT_TOLERANT */
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