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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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/** Media */ |
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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_directory.h" |
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#include "fx_media.h" |
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#include "fx_utility.h" |
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#ifdef FX_ENABLE_EXFAT |
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#include "fx_directory_exFAT.h" |
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#endif /* FX_ENABLE_EXFAT */ |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _fx_media_volume_set PORTABLE C */ |
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/* 6.1.7 */ |
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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 sets the volume name to the name supplied by the */ |
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/* caller. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* media_ptr Media control block pointer */ |
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/* volume_name New volume name */ |
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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_read Read a directory entry */ |
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/* _fx_utility_logical_sector_read Read directory sector */ |
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/* _fx_utility_logical_sector_write Write directory sector */ |
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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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/* 06-02-2021 Bhupendra Naphade Modified comment(s),updated */ |
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/* the initialization of */ |
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/* dir_entry for exFAT format, */ |
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/* resulting in version 6.1.7 */ |
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/* */ |
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/**************************************************************************/ |
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1028 |
UINT _fx_media_volume_set(FX_MEDIA *media_ptr, CHAR *volume_name) |
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{ |
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ULONG i, j; |
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FX_DIR_ENTRY dir_entry, dir_entry1; |
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UINT status, offset; |
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UCHAR *work_ptr; |
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CHAR alpha; |
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/* Check the media to make sure it is open. */ |
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✓✓ |
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if (media_ptr -> fx_media_id != FX_MEDIA_ID) |
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{ |
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/* Return the media not opened error. */ |
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return(FX_MEDIA_NOT_OPEN); |
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} |
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dir_entry.fx_dir_entry_log_sector = 0; |
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dir_entry.fx_dir_entry_byte_offset = 0; |
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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_MEDIA_VOLUME_SET, media_ptr, volume_name, 0, 0, FX_TRACE_MEDIA_EVENTS, 0, 0) |
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/* Protect against other threads accessing the media. */ |
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FX_PROTECT |
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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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{ |
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/* Setup pointer to media name buffer. */ |
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dir_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer; |
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/* Clear the short name string. */ |
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dir_entry.fx_dir_entry_short_name[0] = 0; |
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/* Attempt to find the volume name in the root directory. */ |
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i = 0; |
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do |
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{ |
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/* Read an entry from the root directory. */ |
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status = _fx_directory_entry_read(media_ptr, FX_NULL, &i, &dir_entry); |
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/* Check for error status. */ |
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if (status != FX_SUCCESS) |
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{ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return to caller. */ |
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return(status); |
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} |
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/* Check for a volume name. */ |
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if (dir_entry.fx_dir_entry_type == FX_EXFAT_DIR_ENTRY_TYPE_VOLUME_LABEL) |
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{ |
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/* Yes, we have found a previously set volume name. */ |
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break; |
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} |
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/* Move to next directory entry. */ |
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i++; |
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} while (i < media_ptr -> fx_media_root_directory_entries); |
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/* Determine if a volume entry has been found. */ |
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if (i == media_ptr -> fx_media_root_directory_entries) |
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{ |
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/* Volume entry not found, attempt to find a free entry in the root directory. */ |
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i = 0; |
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do |
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{ |
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/* Read an entry from the root directory. */ |
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status = _fx_directory_entry_read(media_ptr, FX_NULL, &i, &dir_entry); |
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/* Check for error status. */ |
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if (status != FX_SUCCESS) |
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{ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return to caller. */ |
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return(status); |
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} |
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/* Check for a volume name. */ |
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if (dir_entry.fx_dir_entry_type == FX_EXFAT_DIR_ENTRY_TYPE_FREE) |
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{ |
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/* Yes, we have found a free directory entry. */ |
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break; |
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} |
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/* Move to next directory entry. */ |
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i++; |
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} while (i < media_ptr -> fx_media_root_directory_entries); |
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/* Determine if a free entry has been found. */ |
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if (i == media_ptr -> fx_media_root_directory_entries) |
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{ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* No existing volume name was found, return an error. */ |
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return(FX_NOT_FOUND); |
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} |
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} |
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/* Read the logical directory sector. */ |
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status = _fx_utility_logical_sector_read(media_ptr, (ULONG64) dir_entry.fx_dir_entry_log_sector, |
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media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DIRECTORY_SECTOR); |
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/* Determine if an error occurred. */ |
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if (status != FX_SUCCESS) |
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{ |
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/* Release media protection. */ |
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FX_UNPROTECT |
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/* Return error code. */ |
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return(status); |
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} |
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/* Offset to volume label field. */ |
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offset = dir_entry.fx_dir_entry_byte_offset + FX_EXFAT_VOLUME_LABEL; |
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/* Loop to store the volume name. */ |
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for (i = 0; volume_name[i]; i++) |
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{ |
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/* Have we reached the end? */ |
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if (i == 11) |
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{ |
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break; |
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} |
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/* Pickup volume name byte. */ |
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alpha = volume_name[i]; |
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/* Store a byte of the volume name. */ |
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_fx_utility_16_unsigned_write(&media_ptr -> fx_media_memory_buffer[offset], (UINT)alpha); |
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/* Move to next character. */ |
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offset += 2; |
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} |
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/* Offset to character count field. */ |
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offset = dir_entry.fx_dir_entry_byte_offset; |
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/* Store volume label entry type. */ |
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media_ptr -> fx_media_memory_buffer[offset] = FX_EXFAT_DIR_ENTRY_TYPE_VOLUME_LABEL; |
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/* Store the character count. */ |
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media_ptr -> fx_media_memory_buffer[offset + FX_EXFAT_CHAR_COUNT] = (UCHAR)i; |
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/* Write the directory sector to the media. */ |
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status = _fx_utility_logical_sector_write(media_ptr, (ULONG64) dir_entry.fx_dir_entry_log_sector, |
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media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DIRECTORY_SECTOR); |
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} |
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else |
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{ |
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#endif /* FX_ENABLE_EXFAT */ |
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/* First, check for an invalid volume name. */ |
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✓✓ |
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if (volume_name[0] == 0) |
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{ |
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/* Yes, volume name is invalid. Return an error. */ |
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return(FX_INVALID_NAME); |
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} |
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/* Read the logical directory sector 0 - we just do this to get a memory_buffer pointer */ |
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status = _fx_utility_logical_sector_read(media_ptr, ((ULONG64) 0), |
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media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DATA_SECTOR); |
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/* Check the read status. */ |
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✓✓ |
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if (status != FX_SUCCESS) |
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{ |
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/* Release media protection. */ |
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1 |
FX_UNPROTECT |
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/* Return the error status. */ |
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1 |
return(status); |
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} |
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#ifndef FX_MEDIA_STATISTICS_DISABLE |
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/* Increment the number of driver read boot sector requests. */ |
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media_ptr -> fx_media_driver_boot_read_requests++; |
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#endif |
284 |
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285 |
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/* Build a driver request to read the boot record. */ |
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media_ptr -> fx_media_driver_request = FX_DRIVER_BOOT_READ; |
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media_ptr -> fx_media_driver_status = FX_IO_ERROR; |
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media_ptr -> fx_media_driver_buffer = media_ptr -> fx_media_memory_buffer; |
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media_ptr -> fx_media_driver_sectors = 1; |
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media_ptr -> fx_media_driver_sector_type = FX_BOOT_SECTOR; |
291 |
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/* If trace is enabled, insert this event into the trace buffer. */ |
293 |
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FX_TRACE_IN_LINE_INSERT(FX_TRACE_INTERNAL_IO_DRIVER_BOOT_READ, media_ptr, media_ptr -> fx_media_memory_buffer, 0, 0, FX_TRACE_INTERNAL_EVENTS, 0, 0) |
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/* Invoke the driver to read the boot sector. */ |
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(media_ptr -> fx_media_driver_entry) (media_ptr); |
297 |
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298 |
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/* Determine if the request is successful. */ |
299 |
✓✓ |
25 |
if (media_ptr -> fx_media_driver_status) |
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{ |
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/* Release media protection. */ |
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1 |
FX_UNPROTECT |
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/* An error occurred in the driver. */ |
306 |
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1 |
return(media_ptr -> fx_media_driver_status); |
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} |
308 |
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309 |
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/* Calculate the offset based on the FAT present. */ |
310 |
✓✓ |
24 |
if (media_ptr -> fx_media_32_bit_FAT) |
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{ |
312 |
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313 |
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/* FAT32 is present. */ |
314 |
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offset = FX_VOLUME_LABEL_32; |
315 |
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} |
316 |
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else |
317 |
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{ |
318 |
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319 |
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/* FAT12/16 is present. */ |
320 |
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offset = FX_VOLUME_LABEL; |
321 |
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} |
322 |
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323 |
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/* Loop to store the volume name. */ |
324 |
✓✓ |
169 |
for (i = 0; volume_name[i]; i++) |
325 |
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{ |
326 |
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327 |
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/* Have we reached the end? */ |
328 |
✓✓ |
147 |
if (i == 11) |
329 |
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{ |
330 |
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331 |
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2 |
break; |
332 |
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} |
333 |
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334 |
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/* Pickup volume name byte. */ |
335 |
|
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alpha = volume_name[i]; |
336 |
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337 |
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/* Determine if alpha needs to be converted to upper case. */ |
338 |
✓✓✓✓
|
145 |
if ((alpha >= 'a') && (alpha <= 'z')) |
339 |
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{ |
340 |
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341 |
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/* Convert alpha to upper case. */ |
342 |
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alpha = (CHAR)((INT)alpha - 0x20); |
343 |
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} |
344 |
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345 |
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/* Store a byte of the volume name. */ |
346 |
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145 |
media_ptr -> fx_media_memory_buffer[offset + i] = (UCHAR)alpha; |
347 |
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} |
348 |
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349 |
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/* Now pad with spaces. */ |
350 |
✓✓ |
143 |
for (; i < 11; i++) |
351 |
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{ |
352 |
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353 |
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/* Append space character to volume name. */ |
354 |
|
119 |
media_ptr -> fx_media_memory_buffer[offset + i] = 0x20; |
355 |
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} |
356 |
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357 |
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#ifndef FX_MEDIA_STATISTICS_DISABLE |
358 |
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359 |
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/* Increment the number of driver write boot sector requests. */ |
360 |
|
24 |
media_ptr -> fx_media_driver_boot_write_requests++; |
361 |
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#endif |
362 |
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363 |
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/* Write the boot sector with the new volume name. */ |
364 |
|
24 |
media_ptr -> fx_media_driver_request = FX_DRIVER_BOOT_WRITE; |
365 |
|
24 |
media_ptr -> fx_media_driver_status = FX_IO_ERROR; |
366 |
|
24 |
media_ptr -> fx_media_driver_buffer = media_ptr -> fx_media_memory_buffer; |
367 |
|
24 |
media_ptr -> fx_media_driver_sectors = 1; |
368 |
|
24 |
media_ptr -> fx_media_driver_sector_type = FX_BOOT_SECTOR; |
369 |
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370 |
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/* Set the system write flag since we are writing the boot sector. */ |
371 |
|
24 |
media_ptr -> fx_media_driver_system_write = FX_TRUE; |
372 |
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373 |
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/* If trace is enabled, insert this event into the trace buffer. */ |
374 |
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FX_TRACE_IN_LINE_INSERT(FX_TRACE_INTERNAL_IO_DRIVER_BOOT_WRITE, media_ptr, media_ptr -> fx_media_memory_buffer, 0, 0, FX_TRACE_INTERNAL_EVENTS, 0, 0) |
375 |
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376 |
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/* Invoke the driver to write the boot sector. */ |
377 |
|
24 |
(media_ptr -> fx_media_driver_entry) (media_ptr); |
378 |
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379 |
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/* Clear the system write flag. */ |
380 |
|
24 |
media_ptr -> fx_media_driver_system_write = FX_FALSE; |
381 |
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382 |
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/* Determine if the request is successful. */ |
383 |
✓✓ |
24 |
if (media_ptr -> fx_media_driver_status) |
384 |
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{ |
385 |
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386 |
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/* Release media protection. */ |
387 |
|
1 |
FX_UNPROTECT |
388 |
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389 |
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/* An error occurred in the driver. */ |
390 |
|
1 |
return(media_ptr -> fx_media_driver_status); |
391 |
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} |
392 |
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393 |
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/* Setup pointer to media name buffer. */ |
394 |
|
23 |
dir_entry1.fx_dir_entry_name = media_ptr -> fx_media_name_buffer; |
395 |
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396 |
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/* Clear the short name string. */ |
397 |
|
23 |
dir_entry1.fx_dir_entry_short_name[0] = 0; |
398 |
|
|
|
399 |
|
|
/* Now we need to find the copy of the volume name in the root directory. */ |
400 |
|
23 |
i = 0; |
401 |
|
23 |
j = media_ptr -> fx_media_root_directory_entries + 1; |
402 |
|
|
do |
403 |
|
|
{ |
404 |
|
|
|
405 |
|
|
/* Read an entry from the root directory. */ |
406 |
|
156 |
status = _fx_directory_entry_read(media_ptr, FX_NULL, &i, &dir_entry1); |
407 |
|
|
|
408 |
|
|
/* Check for error status. */ |
409 |
✓✓ |
156 |
if (status != FX_SUCCESS) |
410 |
|
|
{ |
411 |
|
|
|
412 |
|
|
/* Release media protection. */ |
413 |
|
1 |
FX_UNPROTECT |
414 |
|
|
|
415 |
|
|
/* Return to caller. */ |
416 |
|
1 |
return(status); |
417 |
|
|
} |
418 |
|
|
|
419 |
|
|
/* Determine if this is an empty entry. */ |
420 |
✓✓✓✓
|
155 |
if ((dir_entry1.fx_dir_entry_name[0] == (CHAR)FX_DIR_ENTRY_FREE) && (dir_entry1.fx_dir_entry_short_name[0] == 0)) |
421 |
|
|
{ |
422 |
|
|
|
423 |
|
|
/* Yes, this is free entry. Is it the first? */ |
424 |
✓✓ |
6 |
if (i < j) |
425 |
|
|
{ |
426 |
|
|
|
427 |
|
|
/* Yes, first free entry - remember it. */ |
428 |
|
5 |
dir_entry = dir_entry1; |
429 |
|
5 |
j = i; |
430 |
|
|
} |
431 |
|
|
} |
432 |
|
|
/* Determine if the directory entries are exhausted. */ |
433 |
✓✓ |
149 |
else if (dir_entry1.fx_dir_entry_name[0] == FX_DIR_ENTRY_DONE) |
434 |
|
|
{ |
435 |
|
|
|
436 |
|
|
/* Yes, this we are at the end of the directory. Have there |
437 |
|
|
been any other free entries? */ |
438 |
✓✓ |
10 |
if (i < j) |
439 |
|
|
{ |
440 |
|
|
|
441 |
|
|
/* No, we need to remember this as the free entry. */ |
442 |
|
8 |
dir_entry = dir_entry1; |
443 |
|
8 |
j = i; |
444 |
|
|
} |
445 |
|
10 |
break; |
446 |
|
|
} |
447 |
|
|
/* Check for a volume name. */ |
448 |
✓✓ |
139 |
else if (dir_entry1.fx_dir_entry_attributes & FX_VOLUME) |
449 |
|
|
{ |
450 |
|
|
|
451 |
|
|
/* Yes, we have found a previously set volume name - use this entry. */ |
452 |
|
9 |
dir_entry = dir_entry1; |
453 |
|
9 |
j = i; |
454 |
|
9 |
break; |
455 |
|
|
} |
456 |
|
|
|
457 |
|
|
/* Move to next directory entry. */ |
458 |
|
136 |
i++; |
459 |
✓✓ |
136 |
} while (i < media_ptr -> fx_media_root_directory_entries); |
460 |
|
|
|
461 |
|
|
/* Determine if a volume entry was not found and there are no more empty slots. */ |
462 |
✓✓ |
22 |
if (i == media_ptr -> fx_media_root_directory_entries) |
463 |
|
|
{ |
464 |
|
|
|
465 |
|
|
/* Determine if there was a free or previous volume name. */ |
466 |
✓✓ |
3 |
if (j == (media_ptr -> fx_media_root_directory_entries + 1)) |
467 |
|
|
{ |
468 |
|
|
|
469 |
|
|
/* No, nothing was available in the root directory. */ |
470 |
|
|
|
471 |
|
|
/* Release media protection. */ |
472 |
|
1 |
FX_UNPROTECT |
473 |
|
|
|
474 |
|
|
/* No, existing volume name or space in the root directly was found, return an error. */ |
475 |
|
1 |
return(FX_MEDIA_INVALID); |
476 |
|
|
} |
477 |
|
|
} |
478 |
|
|
|
479 |
|
|
/* Now set the volume name and attribute. */ |
480 |
|
|
|
481 |
|
|
/* Read the logical directory sector. */ |
482 |
|
21 |
status = _fx_utility_logical_sector_read(media_ptr, (ULONG64) dir_entry.fx_dir_entry_log_sector, |
483 |
|
21 |
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_BOOT_SECTOR); |
484 |
|
|
|
485 |
|
|
/* Check the status of reading the directory entry. */ |
486 |
✓✓ |
21 |
if (status != FX_SUCCESS) |
487 |
|
|
{ |
488 |
|
|
|
489 |
|
|
/* Release media protection. */ |
490 |
|
1 |
FX_UNPROTECT |
491 |
|
|
|
492 |
|
|
/* Return the error status. */ |
493 |
|
1 |
return(status); |
494 |
|
|
} |
495 |
|
|
|
496 |
|
|
/* Calculate pointer into directory buffer. */ |
497 |
|
20 |
work_ptr = media_ptr -> fx_media_memory_buffer + |
498 |
|
20 |
(UINT)dir_entry.fx_dir_entry_byte_offset; |
499 |
|
|
|
500 |
|
|
/* Copy the volume name into the directory entry. */ |
501 |
✓✓ |
151 |
for (i = 0; volume_name[i]; i++) |
502 |
|
|
{ |
503 |
|
|
|
504 |
|
|
/* Have we reached the end? */ |
505 |
✓✓ |
133 |
if (i == 11) |
506 |
|
|
{ |
507 |
|
|
|
508 |
|
2 |
break; |
509 |
|
|
} |
510 |
|
|
|
511 |
|
|
/* Pickup volume name byte. */ |
512 |
|
131 |
alpha = volume_name[i]; |
513 |
|
|
|
514 |
|
|
/* Determine if alpha needs to be converted to upper case. */ |
515 |
✓✓✓✓
|
131 |
if ((alpha >= 'a') && (alpha <= 'z')) |
516 |
|
|
{ |
517 |
|
|
|
518 |
|
|
/* Convert alpha to upper case. */ |
519 |
|
25 |
alpha = (CHAR)((INT)alpha - 0x20); |
520 |
|
|
} |
521 |
|
|
|
522 |
|
|
/* Store volume name. */ |
523 |
|
131 |
work_ptr[i] = (UCHAR)alpha; |
524 |
|
|
} |
525 |
|
|
|
526 |
|
|
/* Pad with space characters. */ |
527 |
✓✓ |
109 |
for (; i < 11; i++) |
528 |
|
|
{ |
529 |
|
89 |
work_ptr[i] = 0x20; |
530 |
|
|
} |
531 |
|
|
|
532 |
|
|
/* Set the appropriate attributes. */ |
533 |
|
20 |
work_ptr[11] = FX_VOLUME | FX_ARCHIVE; |
534 |
|
|
|
535 |
|
|
/* Set the other parts of the volume entry. */ |
536 |
|
|
|
537 |
|
|
/* Clear the hi word of cluster. */ |
538 |
|
20 |
work_ptr[20] = 0; |
539 |
|
20 |
work_ptr[21] = 0; |
540 |
|
|
|
541 |
|
|
/* Clear the low word of cluster. */ |
542 |
|
20 |
work_ptr[26] = 0; |
543 |
|
20 |
work_ptr[27] = 0; |
544 |
|
|
|
545 |
|
|
/* Clear the file size. */ |
546 |
|
20 |
work_ptr[28] = 0; |
547 |
|
20 |
work_ptr[29] = 0; |
548 |
|
20 |
work_ptr[30] = 0; |
549 |
|
20 |
work_ptr[31] = 0; |
550 |
|
|
|
551 |
|
|
/* Write the directory sector to the media. */ |
552 |
|
20 |
status = _fx_utility_logical_sector_write(media_ptr, (ULONG64) dir_entry.fx_dir_entry_log_sector, |
553 |
|
20 |
media_ptr -> fx_media_memory_buffer, ((ULONG) 1), FX_DIRECTORY_SECTOR); |
554 |
|
|
#ifdef FX_ENABLE_EXFAT |
555 |
|
|
} |
556 |
|
|
#endif /* FX_ENABLE_EXFAT */ |
557 |
|
|
|
558 |
|
|
/* Release media protection. */ |
559 |
|
20 |
FX_UNPROTECT |
560 |
|
|
|
561 |
|
|
/* Return the status. */ |
562 |
|
20 |
return(status); |
563 |
|
|
} |
564 |
|
|
|