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/**************************************************************************/ |
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/* */ |
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/* Copyright (c) Microsoft Corporation. All rights reserved. */ |
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/* */ |
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/* This software is licensed under the Microsoft Software License */ |
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */ |
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ |
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/* and in the root directory of this software. */ |
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/* */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** FileX Component */ |
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/** */ |
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/** File */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define FX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "fx_api.h" |
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#include "fx_system.h" |
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#include "fx_file.h" |
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#include "fx_utility.h" |
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#include "fx_directory.h" |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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#include "fx_fault_tolerant.h" |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _fx_file_extended_best_effort_allocate PORTABLE C */ |
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/* 6.1 */ |
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/* AUTHOR */ |
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/* */ |
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/* William E. Lamie, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function attempts to allocate the number of consecutive */ |
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/* clusters required to satisfy the user's request. If there are not */ |
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/* enough clusters, the largest set of clusters are allocated and */ |
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/* linked to the file. If there are no free clusters, an error */ |
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/* code is returned to the caller. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* file_ptr File control block pointer */ |
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/* size Number of bytes to allocate */ |
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/* actual_size_allocated Number of bytes allocated */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* return status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _fx_directory_entry_write Update directory entry */ |
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/* _fx_utility_exFAT_bitmap_flush Flush exFAT allocation bitmap */ |
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/* _fx_utility_exFAT_bitmap_free_cluster_find */ |
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/* Find exFAT free cluster */ |
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/* _fx_utility_exFAT_cluster_state_get Get cluster state */ |
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/* _fx_utility_exFAT_cluster_state_set Set cluster state */ |
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/* _fx_utility_FAT_entry_read Read a FAT entry */ |
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/* _fx_utility_FAT_entry_write Write a FAT entry */ |
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/* _fx_utility_FAT_flush Flush written FAT entries */ |
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/* _fx_utility_logical_sector_flush Flush the written log sector */ |
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/* _fx_fault_tolerant_transaction_start Start fault tolerant */ |
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/* transaction */ |
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/* _fx_fault_tolerant_transaction_end End fault tolerant transaction*/ |
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/* _fx_fault_tolerant_recover Recover FAT chain */ |
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/* _fx_fault_tolerant_reset_log_file Reset the log file */ |
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/* _fx_fault_tolerant_set_FAT_chain Set data of FAT chain */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application Code */ |
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/* */ |
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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 05-19-2020 William E. Lamie Initial Version 6.0 */ |
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/* 09-30-2020 William E. Lamie Modified comment(s), */ |
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/* resulting in version 6.1 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _fx_file_extended_best_effort_allocate(FX_FILE *file_ptr, ULONG64 size, ULONG64 *actual_size_allocated) |
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{ |
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UINT status; |
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ULONG i; |
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UINT found; |
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ULONG bytes_per_cluster; |
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ULONG FAT_index, start_FAT_index; |
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ULONG FAT_value; |
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ULONG clusters, maximum_clusters; |
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FX_MEDIA *media_ptr; |
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#ifdef FX_ENABLE_EXFAT |
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UCHAR cluster_state; |
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#endif /* FX_ENABLE_EXFAT */ |
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#ifdef TX_ENABLE_EVENT_TRACE |
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TX_TRACE_BUFFER_ENTRY *trace_event; |
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ULONG trace_timestamp; |
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#endif |
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/* First, determine if the file is still open. */ |
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✓✓ |
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if (file_ptr -> fx_file_id != FX_FILE_ID) |
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{ |
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/* Return the file not open error status. */ |
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return(FX_NOT_OPEN); |
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} |
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#ifndef FX_MEDIA_STATISTICS_DISABLE |
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/* Setup pointer to media structure. */ |
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media_ptr = file_ptr -> fx_file_media_ptr; |
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/* Increment the number of times this service has been called. */ |
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media_ptr -> fx_media_file_best_effort_allocates++; |
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#endif |
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/* Make sure this file is open for writing. */ |
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✓✓ |
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if (file_ptr -> fx_file_open_mode != FX_OPEN_FOR_WRITE) |
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{ |
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/* Return the access error exception - a write was attempted from |
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a file opened for reading! */ |
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return(FX_ACCESS_ERROR); |
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} |
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/* Determine if the requested allocation is for zero bytes. */ |
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✓✓ |
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if (size == 0) |
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{ |
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/* Return a size allocated of zero. */ |
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*actual_size_allocated = 0; |
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/* Return a successful completion - nothing needs to be done. */ |
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return(FX_SUCCESS); |
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} |
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/* Setup pointer to associated media control block. */ |
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media_ptr = file_ptr -> fx_file_media_ptr; |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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FX_TRACE_IN_LINE_INSERT(FX_TRACE_FILE_BEST_EFFORT_ALLOCATE, file_ptr, size, 0, 0, FX_TRACE_FILE_EVENTS, &trace_event, &trace_timestamp) |
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/* Protect against other threads accessing the media. */ |
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FX_PROTECT |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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/* Start transaction. */ |
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_fx_fault_tolerant_transaction_start(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Check for write protect at the media level (set by driver). */ |
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✓✓ |
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if (media_ptr -> fx_media_driver_write_protect) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return write protect error. */ |
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return(FX_WRITE_PROTECT); |
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} |
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/* Calculate the number of bytes per cluster. */ |
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bytes_per_cluster = ((ULONG)media_ptr -> fx_media_bytes_per_sector) * |
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((ULONG)media_ptr -> fx_media_sectors_per_cluster); |
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/* Check for invalid value. */ |
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✓✓ |
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if (bytes_per_cluster == 0) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Invalid media, return error. */ |
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return(FX_MEDIA_INVALID); |
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} |
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/* Calculate the number of consecutive clusters needed to satisfy this |
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request. */ |
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clusters = (ULONG)(((size + bytes_per_cluster - 1) / bytes_per_cluster)); |
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/* Determine if cluster count is 0. */ |
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✓✓ |
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if (clusters == 0) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Size overflow when rounding to the next cluster, return an error status. */ |
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return(FX_NO_MORE_SPACE); |
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} |
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/* Determine if there are no available clusters on the media. */ |
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✓✓ |
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if (!media_ptr -> fx_media_available_clusters) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return a size allocated of zero, since no clusters were available. */ |
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*actual_size_allocated = 0; |
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/* Not enough clusters, return an error status. */ |
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return(FX_NO_MORE_SPACE); |
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} |
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/* Determine if the requested file allocation would exceed the physical limit of the file. */ |
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✓✓ |
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if (((file_ptr -> fx_file_current_available_size + (((ULONG64) clusters) * ((ULONG64) bytes_per_cluster))) < file_ptr -> fx_file_current_available_size) || |
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✓✓ |
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((file_ptr -> fx_file_current_available_size + (((ULONG64) clusters) * ((ULONG64) bytes_per_cluster))) > 0xFFFFFFFFULL)) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return the no more space error, since the new file size would be larger than |
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the 32-bit field to represent it in the file's directory entry. */ |
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return(FX_NO_MORE_SPACE); |
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} |
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/* Now we need to find the consecutive clusters. */ |
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found = FX_FALSE; |
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#ifdef FX_ENABLE_EXFAT |
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if ((file_ptr -> fx_file_dir_entry.fx_dir_entry_dont_use_fat & 1) && |
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(file_ptr -> fx_file_last_physical_cluster > FX_FAT_ENTRY_START) && |
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(file_ptr -> fx_file_last_physical_cluster < media_ptr -> fx_media_total_clusters - clusters + FX_FAT_ENTRY_START)) |
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{ |
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found = FX_TRUE; |
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/* Try to keep clusters consecutive. */ |
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for (FAT_index = file_ptr -> fx_file_last_physical_cluster + 1; |
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FAT_index < clusters + file_ptr -> fx_file_last_physical_cluster + 1; |
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FAT_index++) |
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{ |
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/* Get cluster state. */ |
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status = _fx_utility_exFAT_cluster_state_get(media_ptr, FAT_index, &cluster_state); |
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/* Check for a successful status. */ |
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if (status != FX_SUCCESS) |
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{ |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return the error status. */ |
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return(status); |
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} |
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/* Determine if the entry is free. */ |
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if (cluster_state == FX_EXFAT_BITMAP_CLUSTER_OCCUPIED) |
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{ |
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found = FX_FALSE; |
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break; |
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} |
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} |
298 |
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FAT_index = file_ptr -> fx_file_last_physical_cluster + 1; |
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} |
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if (!found) |
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{ |
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#endif /* FX_ENABLE_EXFAT */ |
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FAT_index = FX_FAT_ENTRY_START; |
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maximum_clusters = 0; |
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start_FAT_index = FAT_index; |
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308 |
✓✓ |
7164 |
while (FAT_index < (media_ptr -> fx_media_total_clusters + FX_FAT_ENTRY_START)) |
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{ |
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311 |
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/* Determine if enough consecutive FAT entries are available. */ |
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i = 0; |
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#ifdef FX_ENABLE_EXFAT |
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if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
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{ |
317 |
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do |
318 |
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{ |
319 |
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320 |
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/* Get cluster state. */ |
321 |
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status = _fx_utility_exFAT_cluster_state_get(media_ptr, (FAT_index + i), &cluster_state); |
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323 |
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/* Check for a successful status. */ |
324 |
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if (status != FX_SUCCESS) |
325 |
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{ |
326 |
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327 |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
328 |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
329 |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
330 |
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331 |
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/* Release media protection. */ |
332 |
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FX_UNPROTECT |
333 |
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334 |
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/* Return the error status. */ |
335 |
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return(status); |
336 |
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} |
337 |
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338 |
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/* Determine if the entry is free. */ |
339 |
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if (cluster_state == FX_EXFAT_BITMAP_CLUSTER_OCCUPIED) |
340 |
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{ |
341 |
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break; |
342 |
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} |
343 |
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344 |
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/* Otherwise, increment the consecutive FAT indices. */ |
345 |
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i++; |
346 |
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} while ((i < clusters) && ((FAT_index + i) < media_ptr -> fx_media_total_clusters + FX_FAT_ENTRY_START)); |
347 |
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} |
348 |
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else |
349 |
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{ |
350 |
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#endif /* FX_ENABLE_EXFAT */ |
351 |
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352 |
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do |
353 |
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{ |
354 |
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355 |
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/* Read a FAT entry. */ |
356 |
|
7427 |
status = _fx_utility_FAT_entry_read(media_ptr, (FAT_index + i), &FAT_value); |
357 |
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358 |
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/* Check for a successful status. */ |
359 |
✓✓ |
7427 |
if (status != FX_SUCCESS) |
360 |
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{ |
361 |
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362 |
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#ifdef FX_ENABLE_FAULT_TOLERANT |
363 |
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FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
364 |
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#endif /* FX_ENABLE_FAULT_TOLERANT */ |
365 |
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366 |
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/* Release media protection. */ |
367 |
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1 |
FX_UNPROTECT |
368 |
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369 |
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/* Return the error status. */ |
370 |
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1 |
return(status); |
371 |
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} |
372 |
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373 |
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/* Determine if the entry is free. */ |
374 |
✓✓ |
7426 |
if (FAT_value != FX_FREE_CLUSTER) |
375 |
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{ |
376 |
|
7151 |
break; |
377 |
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} |
378 |
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379 |
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/* Otherwise, increment the consecutive FAT indices. */ |
380 |
|
275 |
i++; |
381 |
✓✓✓✓
|
275 |
} while ((i < clusters) && ((FAT_index + i) < media_ptr -> fx_media_total_clusters + FX_FAT_ENTRY_START)); |
382 |
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#ifdef FX_ENABLE_EXFAT |
383 |
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} |
384 |
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#endif /* FX_ENABLE_EXFAT */ |
385 |
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386 |
|
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/* Determine if a new maximum number of clusters has been found. */ |
387 |
✓✓ |
7161 |
if (i > maximum_clusters) |
388 |
|
|
{ |
389 |
|
|
|
390 |
|
|
/* Yes, remember the maximum number of clusters and the starting |
391 |
|
|
cluster. */ |
392 |
|
11 |
maximum_clusters = i; |
393 |
|
11 |
start_FAT_index = FAT_index; |
394 |
|
|
} |
395 |
|
|
|
396 |
|
|
/* Determine if we found enough FAT entries. */ |
397 |
✓✓ |
7161 |
if (i >= clusters) |
398 |
|
|
{ |
399 |
|
|
|
400 |
|
|
/* Yes, we have found enough FAT entries - set the found |
401 |
|
|
flag and get out of this loop. */ |
402 |
|
9 |
found = FX_TRUE; |
403 |
|
9 |
break; |
404 |
|
|
} |
405 |
|
|
else |
406 |
|
|
{ |
407 |
|
|
#ifdef FX_ENABLE_EXFAT |
408 |
|
|
if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
409 |
|
|
{ |
410 |
|
|
|
411 |
|
|
/* Find free cluster from exFAT media. */ |
412 |
|
|
status = _fx_utility_exFAT_bitmap_free_cluster_find(media_ptr, |
413 |
|
|
FAT_index + i + 1, |
414 |
|
|
&FAT_value); |
415 |
|
|
if (status != FX_SUCCESS) |
416 |
|
|
{ |
417 |
|
|
|
418 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
419 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
420 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
421 |
|
|
|
422 |
|
|
/* Release media protection. */ |
423 |
|
|
FX_UNPROTECT |
424 |
|
|
|
425 |
|
|
/* Return the error status. */ |
426 |
|
|
return(status); |
427 |
|
|
} |
428 |
|
|
|
429 |
|
|
if (FAT_value < FAT_index + i + 1) |
430 |
|
|
{ |
431 |
|
|
|
432 |
|
|
/* If we wrapped. */ |
433 |
|
|
FAT_index = media_ptr -> fx_media_total_clusters + FX_FAT_ENTRY_START; |
434 |
|
|
} |
435 |
|
|
else |
436 |
|
|
{ |
437 |
|
|
FAT_index = FAT_value; |
438 |
|
|
} |
439 |
|
|
} |
440 |
|
|
else |
441 |
|
|
{ |
442 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
443 |
|
|
|
444 |
|
|
/* Position to the next possibly free FAT entry. */ |
445 |
|
7152 |
FAT_index = FAT_index + i + 1; |
446 |
|
|
#ifdef FX_ENABLE_EXFAT |
447 |
|
|
} |
448 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
449 |
|
|
} |
450 |
|
|
} |
451 |
|
|
|
452 |
|
|
/* Determine if the total request could not be satisfied, but a partial allocation |
453 |
|
|
could be satisfied. */ |
454 |
✓✓ |
11 |
if (maximum_clusters) |
455 |
|
|
{ |
456 |
|
|
|
457 |
|
|
/* Yes, there was at least one cluster. Prepare to return this |
458 |
|
|
to the caller. */ |
459 |
|
10 |
FAT_index = start_FAT_index; |
460 |
|
10 |
clusters = maximum_clusters; |
461 |
|
10 |
found = FX_TRUE; |
462 |
|
|
} |
463 |
|
|
#ifdef FX_ENABLE_EXFAT |
464 |
|
|
} |
465 |
|
|
#endif |
466 |
|
|
|
467 |
|
|
/* Determine if we found enough consecutive clusters to satisfy the |
468 |
|
|
request. */ |
469 |
✓✓ |
11 |
if (found) |
470 |
|
|
{ |
471 |
|
|
|
472 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
473 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
474 |
|
|
{ |
475 |
|
|
|
476 |
|
|
/* Record the FAT chain being applied to the file system. This information aids |
477 |
|
|
recovery effort if fault happens. */ |
478 |
|
|
media_ptr -> fx_media_fault_tolerant_state |= FX_FAULT_TOLERANT_STATE_SET_FAT_CHAIN; |
479 |
|
|
_fx_fault_tolerant_set_FAT_chain(media_ptr, FX_FALSE, file_ptr -> fx_file_last_physical_cluster, |
480 |
|
|
FAT_index, media_ptr -> fx_media_fat_last, media_ptr -> fx_media_fat_last); |
481 |
|
|
} |
482 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
483 |
|
|
|
484 |
|
|
#ifdef FX_ENABLE_EXFAT |
485 |
|
|
if (file_ptr -> fx_file_dir_entry.fx_dir_entry_dont_use_fat & 1) |
486 |
|
|
{ |
487 |
|
|
if ((file_ptr -> fx_file_total_clusters) && |
488 |
|
|
(FAT_index != file_ptr -> fx_file_last_physical_cluster + 1)) |
489 |
|
|
{ |
490 |
|
|
|
491 |
|
|
/* Clusters are not consecutive. */ |
492 |
|
|
file_ptr -> fx_file_dir_entry.fx_dir_entry_dont_use_fat &= (CHAR)0xfe; /* Set 0bit to 0. */ |
493 |
|
|
|
494 |
|
|
/* Rebuild FAT. */ |
495 |
|
|
FAT_value = file_ptr -> fx_file_dir_entry.fx_dir_entry_cluster + |
496 |
|
|
file_ptr -> fx_file_total_clusters - 1; /* Last cluster */ |
497 |
|
|
|
498 |
|
|
for (i = file_ptr -> fx_file_dir_entry.fx_dir_entry_cluster; i < FAT_value; ++i) |
499 |
|
|
{ |
500 |
|
|
status = _fx_utility_FAT_entry_write(media_ptr, i, i + 1); |
501 |
|
|
if (status != FX_SUCCESS) |
502 |
|
|
{ |
503 |
|
|
|
504 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
505 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
506 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
507 |
|
|
|
508 |
|
|
/* Release media protection. */ |
509 |
|
|
FX_UNPROTECT |
510 |
|
|
|
511 |
|
|
/* Return the bad status. */ |
512 |
|
|
return(status); |
513 |
|
|
} |
514 |
|
|
} |
515 |
|
|
|
516 |
|
|
/* Close chain. */ |
517 |
|
|
status = _fx_utility_FAT_entry_write(media_ptr, FAT_value, media_ptr -> fx_media_fat_last); |
518 |
|
|
if (status != FX_SUCCESS) |
519 |
|
|
{ |
520 |
|
|
|
521 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
522 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
523 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
524 |
|
|
|
525 |
|
|
/* Release media protection. */ |
526 |
|
|
FX_UNPROTECT |
527 |
|
|
|
528 |
|
|
/* Return the bad status. */ |
529 |
|
|
return(status); |
530 |
|
|
} |
531 |
|
|
|
532 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
533 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
534 |
|
|
{ |
535 |
|
|
|
536 |
|
|
/* Clear the Fault Tolerant Set FAT Chain flag. */ |
537 |
|
|
media_ptr -> fx_media_fault_tolerant_state &= (UCHAR)(~FX_FAULT_TOLERANT_STATE_SET_FAT_CHAIN & 0xff); |
538 |
|
|
} |
539 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
540 |
|
|
|
541 |
|
|
/* Update stream. */ |
542 |
|
|
status = _fx_directory_exFAT_entry_write( |
543 |
|
|
media_ptr, &(file_ptr -> fx_file_dir_entry), UPDATE_STREAM); |
544 |
|
|
|
545 |
|
|
if (status != FX_SUCCESS) |
546 |
|
|
{ |
547 |
|
|
|
548 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
549 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
550 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
551 |
|
|
|
552 |
|
|
/* Release media protection. */ |
553 |
|
|
FX_UNPROTECT |
554 |
|
|
|
555 |
|
|
/* Return the bad status. */ |
556 |
|
|
return(status); |
557 |
|
|
} |
558 |
|
|
|
559 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
560 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
561 |
|
|
{ |
562 |
|
|
|
563 |
|
|
/* Set undo phase. */ |
564 |
|
|
media_ptr -> fx_media_fault_tolerant_state |= FX_FAULT_TOLERANT_STATE_SET_FAT_CHAIN; |
565 |
|
|
} |
566 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
567 |
|
|
} |
568 |
|
|
} |
569 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
570 |
|
|
|
571 |
|
|
/* Update the link pointers in the new clusters. */ |
572 |
✓✓ |
271 |
for (i = 0; i < (clusters - 1); i++) |
573 |
|
|
{ |
574 |
|
|
#ifdef FX_ENABLE_EXFAT |
575 |
|
|
if (!(file_ptr -> fx_file_dir_entry.fx_dir_entry_dont_use_fat & 1) |
576 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
577 |
|
|
|| (media_ptr -> fx_media_fault_tolerant_enabled == FX_TRUE) |
578 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
579 |
|
|
) |
580 |
|
|
{ |
581 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
582 |
|
|
|
583 |
|
|
/* Update the cluster links. Since the allocation is |
584 |
|
|
sequential, we just have to link each FAT entry to the |
585 |
|
|
next one. */ |
586 |
|
262 |
status = _fx_utility_FAT_entry_write(media_ptr, FAT_index + i, FAT_index + i + 1); |
587 |
|
|
|
588 |
|
|
/* Check for a bad status. */ |
589 |
✓✓ |
262 |
if (status != FX_SUCCESS) |
590 |
|
|
{ |
591 |
|
|
|
592 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
593 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
594 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
595 |
|
|
|
596 |
|
|
/* Release media protection. */ |
597 |
|
1 |
FX_UNPROTECT |
598 |
|
|
|
599 |
|
|
/* Return the error status. */ |
600 |
|
1 |
return(status); |
601 |
|
|
} |
602 |
|
|
#ifdef FX_ENABLE_EXFAT |
603 |
|
|
} |
604 |
|
|
|
605 |
|
|
if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
606 |
|
|
{ |
607 |
|
|
|
608 |
|
|
/* Mark the cluster as used. */ |
609 |
|
|
status = _fx_utility_exFAT_cluster_state_set(media_ptr, FAT_index + i, FX_EXFAT_BITMAP_CLUSTER_OCCUPIED); |
610 |
|
|
|
611 |
|
|
/* Check for a bad status. */ |
612 |
|
|
if (status != FX_SUCCESS) |
613 |
|
|
{ |
614 |
|
|
|
615 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
616 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
617 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
618 |
|
|
|
619 |
|
|
/* Release media protection. */ |
620 |
|
|
FX_UNPROTECT |
621 |
|
|
|
622 |
|
|
/* Return the error status. */ |
623 |
|
|
return(status); |
624 |
|
|
} |
625 |
|
|
} |
626 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
627 |
|
|
} |
628 |
|
|
|
629 |
|
|
#ifdef FX_ENABLE_EXFAT |
630 |
|
|
if (!(file_ptr -> fx_file_dir_entry.fx_dir_entry_dont_use_fat & 1)) |
631 |
|
|
{ |
632 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
633 |
|
|
|
634 |
|
|
/* Now place an EOF in the last cluster entry. */ |
635 |
|
9 |
status = _fx_utility_FAT_entry_write(media_ptr, FAT_index + clusters - 1, media_ptr -> fx_media_fat_last); |
636 |
|
|
|
637 |
|
|
/* Check for a bad status. */ |
638 |
✓✓ |
9 |
if (status != FX_SUCCESS) |
639 |
|
|
{ |
640 |
|
|
|
641 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
642 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
643 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
644 |
|
|
|
645 |
|
|
/* Release media protection. */ |
646 |
|
1 |
FX_UNPROTECT |
647 |
|
|
|
648 |
|
|
/* Return the error status. */ |
649 |
|
1 |
return(status); |
650 |
|
|
} |
651 |
|
|
#ifdef FX_ENABLE_EXFAT |
652 |
|
|
} |
653 |
|
|
|
654 |
|
|
if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
655 |
|
|
{ |
656 |
|
|
|
657 |
|
|
/* Mark the cluster as used. */ |
658 |
|
|
status = _fx_utility_exFAT_cluster_state_set(media_ptr, FAT_index + clusters - 1, FX_EXFAT_BITMAP_CLUSTER_OCCUPIED); |
659 |
|
|
|
660 |
|
|
/* Check for a bad status. */ |
661 |
|
|
if (status != FX_SUCCESS) |
662 |
|
|
{ |
663 |
|
|
|
664 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
665 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
666 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
667 |
|
|
|
668 |
|
|
/* Release media protection. */ |
669 |
|
|
FX_UNPROTECT |
670 |
|
|
|
671 |
|
|
/* Return the error status. */ |
672 |
|
|
return(status); |
673 |
|
|
} |
674 |
|
|
} |
675 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
676 |
|
|
|
677 |
|
|
#ifdef FX_FAULT_TOLERANT |
678 |
|
|
|
679 |
|
|
/* Flush the cached individual FAT entries */ |
680 |
|
|
_fx_utility_FAT_flush(media_ptr); |
681 |
|
|
#ifdef FX_ENABLE_EXFAT |
682 |
|
|
if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
683 |
|
|
{ |
684 |
|
|
_fx_utility_exFAT_bitmap_flush(media_ptr); |
685 |
|
|
} |
686 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
687 |
|
|
#endif |
688 |
|
|
|
689 |
|
|
/* Actually link up the new clusters to the file. */ |
690 |
|
|
|
691 |
|
|
/* Determine if there are already clusters allocated for this file. */ |
692 |
✓✓ |
8 |
if (file_ptr -> fx_file_total_clusters) |
693 |
|
|
{ |
694 |
|
|
|
695 |
|
|
#ifdef FX_ENABLE_EXFAT |
696 |
|
|
if (!(file_ptr -> fx_file_dir_entry.fx_dir_entry_dont_use_fat & 1)) |
697 |
|
|
{ |
698 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
699 |
|
|
|
700 |
|
|
/* Linkup the last cluster. */ |
701 |
|
6 |
status = _fx_utility_FAT_entry_write(media_ptr, |
702 |
|
|
file_ptr -> fx_file_last_physical_cluster, FAT_index); |
703 |
|
|
|
704 |
|
|
/* Check for a bad status. */ |
705 |
✓✓ |
6 |
if (status != FX_SUCCESS) |
706 |
|
|
{ |
707 |
|
|
|
708 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
709 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
710 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
711 |
|
|
|
712 |
|
|
/* Release media protection. */ |
713 |
|
1 |
FX_UNPROTECT |
714 |
|
|
|
715 |
|
|
/* Return the error status. */ |
716 |
|
1 |
return(status); |
717 |
|
|
} |
718 |
|
|
#ifdef FX_ENABLE_EXFAT |
719 |
|
|
} |
720 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
721 |
|
|
|
722 |
|
|
/* Determine if we are adding a sector after a write filled the previously |
723 |
|
|
allocated cluster exactly. */ |
724 |
|
5 |
if ((file_ptr -> fx_file_current_relative_sector >= |
725 |
✓✓ |
5 |
(media_ptr -> fx_media_sectors_per_cluster - 1)) && |
726 |
|
4 |
(file_ptr -> fx_file_current_logical_offset >= |
727 |
✓✓ |
4 |
media_ptr -> fx_media_bytes_per_sector)) |
728 |
|
|
{ |
729 |
|
|
|
730 |
|
|
/* Yes, we need to adjust all of the pertinent file parameters for |
731 |
|
|
access into this newly allocated cluster. */ |
732 |
|
2 |
file_ptr -> fx_file_current_physical_cluster = FAT_index; |
733 |
|
2 |
file_ptr -> fx_file_current_relative_cluster++; |
734 |
|
2 |
file_ptr -> fx_file_current_relative_sector = 0; |
735 |
|
2 |
file_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
736 |
|
2 |
(((ULONG64)(FAT_index - FX_FAT_ENTRY_START)) * |
737 |
|
2 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster)); |
738 |
|
2 |
file_ptr -> fx_file_current_logical_offset = 0; |
739 |
|
|
} |
740 |
|
|
} |
741 |
|
|
else |
742 |
|
|
{ |
743 |
|
|
|
744 |
|
|
/* These new clusters are also the first! Setup the initial |
745 |
|
|
file parameters. */ |
746 |
|
2 |
file_ptr -> fx_file_first_physical_cluster = FAT_index; |
747 |
|
2 |
file_ptr -> fx_file_current_physical_cluster = file_ptr -> fx_file_first_physical_cluster; |
748 |
|
2 |
file_ptr -> fx_file_current_relative_cluster = 0; |
749 |
|
2 |
file_ptr -> fx_file_current_logical_sector = ((ULONG)media_ptr -> fx_media_data_sector_start) + |
750 |
|
2 |
(((ULONG64)(file_ptr -> fx_file_first_physical_cluster - FX_FAT_ENTRY_START)) * |
751 |
|
2 |
((ULONG)media_ptr -> fx_media_sectors_per_cluster)); |
752 |
|
2 |
file_ptr -> fx_file_current_logical_offset = 0; |
753 |
|
2 |
file_ptr -> fx_file_current_file_offset = 0; |
754 |
|
|
|
755 |
|
|
/* Setup the consecutive clusters at the beginning of the file. */ |
756 |
|
2 |
file_ptr -> fx_file_consecutive_cluster = clusters; |
757 |
|
|
|
758 |
|
|
/* Update the first cluster in the directory entry. */ |
759 |
|
2 |
file_ptr -> fx_file_dir_entry.fx_dir_entry_cluster = FAT_index; |
760 |
|
|
|
761 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
762 |
|
|
if (media_ptr -> fx_media_fault_tolerant_enabled) |
763 |
|
|
{ |
764 |
|
|
|
765 |
|
|
/* Clear undo phase. */ |
766 |
|
|
media_ptr -> fx_media_fault_tolerant_state &= (UCHAR)(~FX_FAULT_TOLERANT_STATE_SET_FAT_CHAIN & 0xff); |
767 |
|
|
} |
768 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
769 |
|
|
} |
770 |
|
|
|
771 |
|
|
/* Remember the last physical cluster. */ |
772 |
|
7 |
file_ptr -> fx_file_last_physical_cluster = FAT_index + clusters - 1; |
773 |
|
|
|
774 |
|
|
/* Update the available size. */ |
775 |
|
|
#ifdef FX_ENABLE_EXFAT |
776 |
|
|
if (file_ptr -> fx_file_current_available_size > (file_ptr -> fx_file_current_available_size + (bytes_per_cluster * clusters))) |
777 |
|
|
{ |
778 |
|
|
/* 64-bit wrap around condition is present. Just set the available file size to all ones, which is |
779 |
|
|
the maximum file size. */ |
780 |
|
|
file_ptr -> fx_file_current_available_size = 0xFFFFFFFFFFFFFFFFULL; |
781 |
|
|
} |
782 |
|
|
|
783 |
|
|
/* Check for wrap-around when updating the available size. */ |
784 |
|
|
if ((media_ptr -> fx_media_FAT_type != FX_exFAT) && |
785 |
|
|
(file_ptr -> fx_file_current_available_size + (bytes_per_cluster * clusters) > 0xFFFFFFFFUL)) |
786 |
|
|
{ |
787 |
|
|
|
788 |
|
|
/* 32-bit wrap around condition is present. Just set the available file size to all ones, which is |
789 |
|
|
the maximum file size. */ |
790 |
|
|
file_ptr -> fx_file_current_available_size = 0xFFFFFFFFUL; |
791 |
|
|
} |
792 |
|
|
else |
793 |
|
|
{ |
794 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
795 |
|
|
|
796 |
|
|
/* Normal condition, update the available size. */ |
797 |
|
7 |
file_ptr -> fx_file_current_available_size = |
798 |
|
7 |
file_ptr -> fx_file_current_available_size + bytes_per_cluster * clusters; |
799 |
|
|
#ifdef FX_ENABLE_EXFAT |
800 |
|
|
} |
801 |
|
|
|
802 |
|
|
if (file_ptr -> fx_file_dir_entry.fx_dir_entry_dont_use_fat & 1) |
803 |
|
|
{ |
804 |
|
|
file_ptr -> fx_file_consecutive_cluster += clusters; |
805 |
|
|
} |
806 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
807 |
|
|
|
808 |
|
|
/* Increment the total clusters for this file. */ |
809 |
|
7 |
file_ptr -> fx_file_total_clusters = |
810 |
|
7 |
file_ptr -> fx_file_total_clusters + clusters; |
811 |
|
|
|
812 |
|
|
/* Decrease the available clusters on the media. */ |
813 |
|
7 |
media_ptr -> fx_media_available_clusters = |
814 |
|
7 |
media_ptr -> fx_media_available_clusters - clusters; |
815 |
|
|
|
816 |
|
|
/* Return the actual size allocated. */ |
817 |
|
7 |
*actual_size_allocated = ((ULONG64)clusters) * bytes_per_cluster; |
818 |
|
|
|
819 |
|
|
#if defined(FX_UPDATE_FILE_SIZE_ON_ALLOCATE) || defined(FX_ENABLE_FAULT_TOLERANT) |
820 |
|
|
|
821 |
|
|
/* Set the file size the current size plus what what was added. */ |
822 |
|
|
if (size < *actual_size_allocated) |
823 |
|
|
{ |
824 |
|
|
file_ptr -> fx_file_current_file_size += size; |
825 |
|
|
} |
826 |
|
|
else |
827 |
|
|
{ |
828 |
|
|
file_ptr -> fx_file_current_file_size += *actual_size_allocated; |
829 |
|
|
} |
830 |
|
|
|
831 |
|
|
/* Copy the new file size into the directory entry. */ |
832 |
|
|
file_ptr -> fx_file_dir_entry.fx_dir_entry_file_size = file_ptr -> fx_file_current_file_size; |
833 |
|
|
#endif |
834 |
|
|
|
835 |
|
|
/* Update the trace event with the bytes allocated. */ |
836 |
|
|
FX_TRACE_EVENT_UPDATE(trace_event, trace_timestamp, FX_TRACE_FILE_BEST_EFFORT_ALLOCATE, 0, 0, *actual_size_allocated, 0); |
837 |
|
|
|
838 |
|
|
/* Write the directory entry to the media. */ |
839 |
|
|
#ifdef FX_ENABLE_EXFAT |
840 |
|
|
if (media_ptr -> fx_media_FAT_type == FX_exFAT) |
841 |
|
|
{ |
842 |
|
|
status = _fx_directory_exFAT_entry_write( |
843 |
|
|
media_ptr, &(file_ptr -> fx_file_dir_entry), UPDATE_STREAM); |
844 |
|
|
} |
845 |
|
|
else |
846 |
|
|
{ |
847 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
848 |
|
7 |
status = _fx_directory_entry_write(media_ptr, &(file_ptr -> fx_file_dir_entry)); |
849 |
|
|
#ifdef FX_ENABLE_EXFAT |
850 |
|
|
} |
851 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
852 |
|
|
|
853 |
|
|
/* Check for a good status. */ |
854 |
✓✓ |
7 |
if (status != FX_SUCCESS) |
855 |
|
|
{ |
856 |
|
|
|
857 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
858 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
859 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
860 |
|
|
|
861 |
|
|
/* Release media protection. */ |
862 |
|
1 |
FX_UNPROTECT |
863 |
|
|
|
864 |
|
|
/* Return the error status. */ |
865 |
|
1 |
return(status); |
866 |
|
|
} |
867 |
|
|
} |
868 |
|
|
else |
869 |
|
|
{ |
870 |
|
|
|
871 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
872 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
873 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
874 |
|
|
|
875 |
|
|
/* Release media protection. */ |
876 |
|
1 |
FX_UNPROTECT |
877 |
|
|
|
878 |
|
|
/* Return a size allocated of zero, since no clusters were available. */ |
879 |
|
1 |
*actual_size_allocated = 0; |
880 |
|
|
|
881 |
|
|
/* Not enough contiguous space on the media. Return error status. */ |
882 |
|
1 |
return(FX_NO_MORE_SPACE); |
883 |
|
|
} |
884 |
|
|
|
885 |
|
|
#ifdef FX_FAULT_TOLERANT |
886 |
|
|
|
887 |
|
|
/* Flush the cached individual FAT entries */ |
888 |
|
|
_fx_utility_FAT_flush(media_ptr); |
889 |
|
|
#endif |
890 |
|
|
|
891 |
|
|
/* Flush the internal logical sector cache. */ |
892 |
|
6 |
status = _fx_utility_logical_sector_flush(media_ptr, ((ULONG64) 1), (ULONG64) (media_ptr -> fx_media_sectors_per_FAT), FX_FALSE); |
893 |
|
|
|
894 |
|
|
#ifdef FX_ENABLE_FAULT_TOLERANT |
895 |
|
|
/* Check for a bad status. */ |
896 |
|
|
if (status != FX_SUCCESS) |
897 |
|
|
{ |
898 |
|
|
|
899 |
|
|
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr); |
900 |
|
|
|
901 |
|
|
/* Release media protection. */ |
902 |
|
|
FX_UNPROTECT |
903 |
|
|
|
904 |
|
|
/* Return the bad status. */ |
905 |
|
|
return(status); |
906 |
|
|
} |
907 |
|
|
|
908 |
|
|
/* End transaction. */ |
909 |
|
|
status = _fx_fault_tolerant_transaction_end(media_ptr); |
910 |
|
|
#endif /* FX_ENABLE_FAULT_TOLERANT */ |
911 |
|
|
|
912 |
|
|
/* Release media protection. */ |
913 |
|
6 |
FX_UNPROTECT |
914 |
|
|
|
915 |
|
|
/* Return status to the caller. */ |
916 |
|
6 |
return(status); |
917 |
|
|
} |
918 |
|
|
|