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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_directory.h"
#include "fx_fault_tolerant.h"
#ifdef FX_ENABLE_FAULT_TOLERANT
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _fx_fault_tolerant_reset_log_file PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function removes all log entries from the log file, and */
/* it to its initial state. */
/* */
/* INPUT */
/* */
/* media_ptr Media control block pointer */
/* */
/* 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_fault_tolerant_calculate_checksum Compute Checksum of data */
/* _fx_fault_tolerant_write_log_file Write log file */
/* */
/* CALLED BY */
/* */
/* _fx_directory_attributes_set */
/* _fx_directory_create */
/* _fx_directory_delete */
/* _fx_directory_rename */
/* _fx_file_allocate */
/* _fx_file_attributes_set */
/* _fx_file_best_effort_allocate */
/* _fx_file_create */
/* _fx_file_delete */
/* _fx_file_rename */
/* _fx_file_truncate */
/* _fx_file_truncate_release */
/* _fx_file_write */
/* _fx_unicode_directory_create */
/* _fx_unicode_file_create */
/* _fx_fault_tolerant_enable */
/* _fx_fault_tolerant_transaction_end */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 William E. Lamie Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _fx_fault_tolerant_reset_log_file(FX_MEDIA *media_ptr)
{
UINT status;
USHORT checksum;
FX_FAULT_TOLERANT_LOG_HEADER *log_header;
FX_FAULT_TOLERANT_FAT_CHAIN *FAT_chain;
FX_FAULT_TOLERANT_LOG_CONTENT *log_content;
/* Set log header, FAT chain and log content pointer. */
log_header = (FX_FAULT_TOLERANT_LOG_HEADER *)media_ptr -> fx_media_fault_tolerant_memory_buffer;
FAT_chain = (FX_FAULT_TOLERANT_FAT_CHAIN *)(media_ptr -> fx_media_fault_tolerant_memory_buffer +
FX_FAULT_TOLERANT_FAT_CHAIN_OFFSET);
log_content = (FX_FAULT_TOLERANT_LOG_CONTENT *)(media_ptr -> fx_media_fault_tolerant_memory_buffer +
FX_FAULT_TOLERANT_LOG_CONTENT_OFFSET);
/* Reset the log file header. */
_fx_utility_32_unsigned_write((UCHAR *)&log_header -> fx_fault_tolerant_log_header_id, FX_FAULT_TOLERANT_ID);
_fx_utility_16_unsigned_write((UCHAR *)&log_header -> fx_fault_tolerant_log_header_total_size,
(FX_FAULT_TOLERANT_LOG_HEADER_SIZE + FX_FAULT_TOLERANT_FAT_CHAIN_SIZE));
_fx_utility_16_unsigned_write((UCHAR *)&log_header -> fx_fault_tolerant_log_header_checksum, 0);
log_header -> fx_fault_tolerant_log_header_version_major = FX_FAULT_TOLERANT_VERSION_MAJOR;
log_header -> fx_fault_tolerant_log_header_version_minor = FX_FAULT_TOLERANT_VERSION_MINOR;
_fx_utility_16_unsigned_write((UCHAR *)&log_header -> fx_fault_tolerant_log_header_reserved, 0);
checksum = _fx_fault_tolerant_calculate_checksum((UCHAR *)log_header, FX_FAULT_TOLERANT_LOG_HEADER_SIZE);
_fx_utility_16_unsigned_write((UCHAR *)&log_header -> fx_fault_tolerant_log_header_checksum, checksum);
/* Reset the undo log section. */
_fx_utility_16_unsigned_write((UCHAR *)&FAT_chain -> fx_fault_tolerant_FAT_chain_checksumm, 0xFFFF);
FAT_chain -> fx_fault_tolerant_FAT_chain_flag = 0;
FAT_chain -> fx_fault_tolerant_FAT_chain_reserved = 0;
_fx_utility_32_unsigned_write((UCHAR *)&FAT_chain -> fx_fault_tolerant_FAT_chain_insertion_front, 0);
_fx_utility_32_unsigned_write((UCHAR *)&FAT_chain -> fx_fault_tolerant_FAT_chain_head_new, 0);
_fx_utility_32_unsigned_write((UCHAR *)&FAT_chain -> fx_fault_tolerant_FAT_chain_head_original, 0);
_fx_utility_32_unsigned_write((UCHAR *)&FAT_chain -> fx_fault_tolerant_FAT_chain_insertion_back, 0);
_fx_utility_32_unsigned_write((UCHAR *)&FAT_chain -> fx_fault_tolerant_FAT_chain_next_deletion, 0);
/* Reset log content header. */
_fx_utility_16_unsigned_write((UCHAR *)&log_content -> fx_fault_tolerant_log_content_checksum, 0xFFFF);
_fx_utility_16_unsigned_write((UCHAR *)&log_content -> fx_fault_tolerant_log_content_count, 0xFFFF);
/* No matter success or fail, close this transaction. */
media_ptr -> fx_media_fault_tolerant_state = FX_FAULT_TOLERANT_STATE_IDLE;
/* Write the log header and FAT chain. */
status = _fx_fault_tolerant_write_log_file(media_ptr, 0);
/* Return the status. */
return(status);
}
#endif /* FX_ENABLE_FAULT_TOLERANT */
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