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Diffstat (limited to 'nuttx/fs/fat/fs_writefat.c')
| -rw-r--r-- | nuttx/fs/fat/fs_writefat.c | 544 |
1 files changed, 0 insertions, 544 deletions
diff --git a/nuttx/fs/fat/fs_writefat.c b/nuttx/fs/fat/fs_writefat.c deleted file mode 100644 index 564be5b50..000000000 --- a/nuttx/fs/fat/fs_writefat.c +++ /dev/null @@ -1,544 +0,0 @@ -/**************************************************************************** - * fs/fat/fs_writefat.c - * - * Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <sys/types.h> -#include <stdint.h> -#include <string.h> -#include <errno.h> - -#include <nuttx/fs/fs.h> -#include <nuttx/fs/fat.h> -#include <nuttx/fs/mkfatfs.h> - -#include "fs_internal.h" -#include "fs_fat32.h" -#include "fs_mkfatfs.h" - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: mkfatfs_initmbr - * - * Description: - * Initialize the sector image of a masterbood record - * - * Input: - * fmt - User specified format parameters - * var - Other format parameters that are not user specifiable - * - * Return: - * None; caller is responsible for providing valid parameters. - * - ****************************************************************************/ -static inline void mkfatfs_initmbr(FAR struct fat_format_s *fmt, - FAR struct fat_var_s *var) -{ - memset(var->fv_sect, 0, var->fv_sectorsize); - - /* 3@0: Jump instruction to boot code */ - - memcpy(&var->fv_sect[BS_JUMP], var->fv_jump, 3); - - /* 8@3: Usually "MSWIN4.1" */ - - strcpy((char*)&var->fv_sect[BS_OEMNAME], "NUTTX "); - - /* 2@11: Bytes per sector: 512, 1024, 2048, 4096 */ - - MBR_PUTBYTESPERSEC(var->fv_sect, var->fv_sectorsize); - - /* 1@13: Sectors per allocation unit: 2**n, n=0..7 */ - - MBR_PUTSECPERCLUS(var->fv_sect, (1 << fmt->ff_clustshift)); - - /* 2@14: Reserved sector count: Usually 32 */ - - MBR_PUTRESVDSECCOUNT(var->fv_sect, fmt->ff_rsvdseccount); - - /* 1@16: Number of FAT data structures: always 2 */ - - MBR_PUTNUMFATS(var->fv_sect, fmt->ff_nfats); - - /* 2@17: FAT12/16: Must be 0 for FAT32 */ - - MBR_PUTROOTENTCNT(var->fv_sect, fmt->ff_rootdirentries); - - /* 2@19: FAT12/16: Must be 0, see BS_TOTSEC32. - * Handled with 4@32: Total count of sectors on the volume */ - - if (fmt->ff_nsectors >= 65536) - { - MBR_PUTTOTSEC32(var->fv_sect, fmt->ff_nsectors); - } - else - { - MBR_PUTTOTSEC16(var->fv_sect, (uint16_t)fmt->ff_nsectors); - } - - /* 1@21: Media code: f0, f8, f9-fa, fc-ff */ - - MBR_PUTMEDIA(var->fv_sect, FAT_DEFAULT_MEDIA_TYPE); /* Only "hard drive" supported */ - - /* 2@22: FAT12/16: Must be 0, see BS32_FATSZ32 -- handled in FAT specific logic */ - - /* 2@24: Sectors per track geometry value and 2@26: Number of heads geometry value */ - - MBR_PUTSECPERTRK(var->fv_sect, FAT_DEFAULT_SECPERTRK); - MBR_PUTNUMHEADS(var->fv_sect, FAT_DEFAULT_NUMHEADS); - - /* 4@28: Count of hidden sectors preceding FAT */ - - MBR_PUTHIDSEC(var->fv_sect, fmt->ff_hidsec); - - /* 4@32: Total count of sectors on the volume -- handled above */ - - /* Most of the rest of the sector depends on the FAT size */ - - if (fmt->ff_fattype != 32) - { - /* 2@22: FAT12/16: Must be 0, see BS32_FATSZ32 */ - - MBR_PUTFATSZ16(var->fv_sect, (uint16_t)var->fv_nfatsects); - - /* The following fields are only valid for FAT12/16 */ - /* 1@36: Drive number for MSDOS bootstrap -- left zero */ - /* 1@37: Reserved (zero) */ - /* 1@38: Extended boot signature: 0x29 if following valid */ - - MBR_PUTBOOTSIG16(var->fv_sect, EXTBOOT_SIGNATURE); - - /* 4@39: Volume serial number */ - - MBR_PUTVOLID16(var->fv_sect, fmt->ff_volumeid); - - /* 11@43: Volume label */ - - memcpy(&var->fv_sect[BS16_VOLLAB], fmt->ff_volumelabel, 11); - - /* 8@54: "FAT12 ", "FAT16 ", or "FAT " */ - - if (fmt->ff_fattype == 12) - { - memcpy(&var->fv_sect[BS16_FILESYSTYPE], "FAT12 ", 8); - } - else /* if (fmt->ff_fattype == 16) */ - { - memcpy(&var->fv_sect[BS16_FILESYSTYPE], "FAT16 ", 8); - } - - /* Boot code may be placed in the remainder of the sector */ - - memcpy(&var->fv_sect[BS16_BOOTCODE], var->fv_bootcode, var->fv_bootcodesize); - } - else - { - /* The following fields are only valid for FAT32 */ - /* 4@36: Count of sectors occupied by one FAT */ - - MBR_PUTFATSZ32(var->fv_sect, var->fv_nfatsects); - - /* 2@40: 0-3:Active FAT, 7=0 both FATS, 7=1 one FAT -- left zero*/ - /* 2@42: MSB:Major LSB:Minor revision number (0.0) -- left zero */ - /* 4@44: Cluster no. of 1st cluster of root dir */ - - MBR_PUTROOTCLUS(var->fv_sect, FAT32_DEFAULT_ROOT_CLUSTER); - - /* 2@48: Sector number of fsinfo structure. Usually 1. */ - - MBR_PUTFSINFO(var->fv_sect, FAT_DEFAULT_FSINFO_SECTOR); - - /* 2@50: Sector number of boot record. Usually 6 */ - - MBR_PUTBKBOOTSEC(var->fv_sect, fmt->ff_backupboot); - - /* 12@52: Reserved (zero) */ - /* 1@64: Drive number for MSDOS bootstrap -- left zero */ - /* 1@65: Reserved (zero) */ - /* 1@66: Extended boot signature: 0x29 if following valid */ - - MBR_PUTBOOTSIG32(var->fv_sect, EXTBOOT_SIGNATURE); - - /* 4@67: Volume serial number */ - - MBR_PUTVOLID32(var->fv_sect, fmt->ff_volumeid); - - /* 11@71: Volume label */ - - memcpy(&var->fv_sect[BS32_VOLLAB], fmt->ff_volumelabel, 11); - - /* 8@82: "FAT12 ", "FAT16 ", or "FAT " */ - - memcpy(&var->fv_sect[BS32_FILESYSTYPE], "FAT32 ", 8); - - /* Boot code may be placed in the remainder of the sector */ - - memcpy(&var->fv_sect[BS16_BOOTCODE], var->fv_bootcode, var->fv_bootcodesize); - } - - /* The magic bytes at the end of the MBR are common to FAT12/16/32 */ - /* 2@510: Valid MBRs have 0x55aa here */ - - MBR_PUTSIGNATURE(var->fv_sect, BOOT_SIGNATURE16); -} - -/**************************************************************************** - * Name: mkfatfs_initfsinfo - * - * Description: - * Initialize the FAT32 FSINFO sector image - * - * Input: - * fmt - User specified format parameters - * var - Other format parameters that are not user specifiable - * - * Return: - * None; caller is responsible for providing valid parameters. - * - ****************************************************************************/ -static inline void mkfatfs_initfsinfo(FAR struct fat_format_s *fmt, - FAR struct fat_var_s *var) -{ - memset(var->fv_sect, 0, var->fv_sectorsize); - - /* 4@0: 0x41615252 = "RRaA" */ - - FSI_PUTLEADSIG(var->fv_sect, 0x41615252); - - /* 480@4: Reserved (zero) */ - /* 4@484: 0x61417272 = "rrAa" */ - - FSI_PUTSTRUCTSIG(var->fv_sect, 0x61417272); - - /* 4@488: Last free cluster count on volume */ - - FSI_PUTFREECOUNT(var->fv_sect, var->fv_nclusters - 1); - - /* 4@492: Cluster number of 1st free cluster */ - - FSI_PUTNXTFREE(var->fv_sect, FAT32_DEFAULT_ROOT_CLUSTER); - - /* 12@496: Reserved (zero) */ - /* 4@508: 0xaa550000 */ - - FSI_PUTTRAILSIG(var->fv_sect, BOOT_SIGNATURE32); -} - -/**************************************************************************** - * Name: mkfatfs_initrootdir - * - * Description: - * Initialize one root directory sector image - * - * Input: - * fmt - User specified format parameters - * var - Other format parameters that are not user specifiable - * sectno - On FAT32, the root directory is a cluster chain. - * This value indicates which sector of the cluster should be produced. - * - * Return: - * None; caller is responsible for providing valid parameters. - * - ****************************************************************************/ -static inline void mkfatfs_initrootdir(FAR struct fat_format_s *fmt, - FAR struct fat_var_s *var, int sectno) -{ - memset(var->fv_sect, 0, var->fv_sectorsize); - if (sectno == 0) - { - /* It is only necessary to set data in the first sector of the directory */ - - if (memcmp(fmt->ff_volumelabel, " ", 11)) - { - memcpy(&var->fv_sect[DIR_NAME], fmt->ff_volumelabel, 11); - } - - DIR_PUTATTRIBUTES(var->fv_sect, FATATTR_VOLUMEID); - DIR_PUTCRTIME(var->fv_sect, var->fv_createtime & 0xffff); - DIR_PUTWRTTIME(var->fv_sect, var->fv_createtime & 0xffff); - DIR_PUTCRDATE(var->fv_sect, var->fv_createtime >> 16); - DIR_PUTWRTDATE(var->fv_sect, var->fv_createtime >> 16); - } -} - -/**************************************************************************** - * Name: mkfatfs_writembr - * - * Description: - * Write the master boot record and, for FAT32, the backup boot record and - * the fsinfo sector. - * - * Input: - * fmt - User specified format parameters - * var - Other format parameters that are not user specifiable - * - * Return: - * Zero on success; negated errno on failure - * - ****************************************************************************/ - -static inline int mkfatfs_writembr(FAR struct fat_format_s *fmt, - FAR struct fat_var_s *var) -{ - int sectno; - int ret; - - /* Create an image of the configured master boot record */ - - mkfatfs_initmbr(fmt, var); - - /* Write the master boot record as sector zero */ - - ret = DEV_WRITE(var->fv_sect, 0, 1); - - /* Write all of the reserved sectors */ - - memset(var->fv_sect, 0, var->fv_sectorsize); - for (sectno = 1; sectno < fmt->ff_rsvdseccount && ret >= 0; sectno++) - { - ret = DEV_WRITE(var->fv_sect, sectno, 1); - } - - /* Write FAT32-specific sectors */ - - if (ret >= 0 && fmt->ff_fattype == 32) - { - /* Write the backup master boot record */ - - if (fmt->ff_backupboot != 0) - { - /* Create another copy of the configured master boot record */ - - mkfatfs_initmbr(fmt, var); - - /* Write it to the backup location */ - - ret = DEV_WRITE(var->fv_sect, fmt->ff_backupboot, 1); - } - - if (ret >= 0) - { - /* Create an image of the fsinfo sector*/ - - mkfatfs_initfsinfo(fmt, var); - - /* Write the fsinfo sector */ - - ret = DEV_WRITE(var->fv_sect, FAT_DEFAULT_FSINFO_SECTOR, 1); - } - } - - return ret; -} - -/**************************************************************************** - * Name: mkfatfs_writefat - * - * Description: - * Write the FAT sectors - * - * Input: - * fmt - User specified format parameters - * var - Other format parameters that are not user specifiable - * - * Return: - * Zero on success; negated errno on failure - * - ****************************************************************************/ - -static inline int mkfatfs_writefat(FAR struct fat_format_s *fmt, - FAR struct fat_var_s *var) -{ - off_t offset = fmt->ff_rsvdseccount; - int fatno; - int sectno; - int ret; - - /* Loop for each FAT copy */ - - for (fatno = 0; fatno < fmt->ff_nfats; fatno++) - { - /* Loop for each sector in the FAT */ - - for (sectno = 0; sectno < var->fv_nfatsects; sectno++) - { - memset(var->fv_sect, 0, var->fv_sectorsize); - - /* Mark cluster allocations in sector one of each FAT */ - - if (sectno == 0) - { - memset(var->fv_sect, 0, var->fv_sectorsize); - switch(fmt->ff_fattype) - { - case 12: - /* Mark the first two full FAT entries -- 24 bits, 3 bytes total */ - - memset(var->fv_sect, 0xff, 3); - break; - - case 16: - /* Mark the first two full FAT entries -- 32 bits, 4 bytes total */ - - memset(var->fv_sect, 0xff, 4); - break; - - case 32: - default: /* Shouldn't happen */ - /* Mark the first two full FAT entries -- 64 bits, 8 bytes total */ - - memset(var->fv_sect, 0xff, 8); - - /* Cluster 2 is used as the root directory. Mark as EOF */ - - var->fv_sect[8] = 0xf8; - memset(&var->fv_sect[9], 0xff, 3); - break; - } - - /* Save the media type in the first byte of the FAT */ - - var->fv_sect[0] = FAT_DEFAULT_MEDIA_TYPE; - } - - /* Write the FAT sector */ - - ret = DEV_WRITE(var->fv_sect, offset, 1); - if (ret < 0) - { - return ret; - } - offset++; - } - } - return OK; -} - -/**************************************************************************** - * Name: mkfatfs_writerootdir - * - * Description: - * Write the root directory sectors - * - * Input: - * fmt - User specified format parameters - * var - Other format parameters that are not user specifiable - * - * Return: - * Zero on success; negated errno on failure - * - ****************************************************************************/ - -static inline int mkfatfs_writerootdir(FAR struct fat_format_s *fmt, - FAR struct fat_var_s *var) -{ - off_t offset = fmt->ff_rsvdseccount + fmt->ff_nfats * var->fv_nfatsects; - int ret; - int i; - - /* Write the root directory after the last FAT. This is the root directory - * area for FAT12/16, and the first cluster on FAT32. - */ - - for (i = 0; i < var->fv_nrootdirsects; i++) - { - /* Format the next sector of the root directory */ - - mkfatfs_initrootdir(fmt, var, i); - - /* Write the next sector of the root directory */ - - ret = DEV_WRITE(var->fv_sect, offset, 1); - if (ret < 0) - { - return ret; - } - offset++; - } - return 0; -} - -/**************************************************************************** - * Global Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: mkfatfs_writefat - * - * Description: - * Write the configured fat filesystem to the block device - * - * Input: - * fmt - Caller specified format parameters - * var - Other format parameters that are not caller specifiable. (Most - * set by mkfatfs_configfatfs()). - * - * Return: - * Zero on success; negated errno on failure - * - ****************************************************************************/ - -int mkfatfs_writefatfs(FAR struct fat_format_s *fmt, - FAR struct fat_var_s *var) -{ - int ret; - - /* Write the master boot record (also the backup and fsinfo sectors) */ - - ret = mkfatfs_writembr(fmt, var); - - /* Write FATs */ - - if (ret >= 0) - { - ret = mkfatfs_writefat(fmt, var); - } - - /* Write the root directory after the last FAT. */ - - if (ret >= 0) - { - ret = mkfatfs_writerootdir(fmt, var); - } - return ret; -} - |