本文主要记录制作过程，因为用到了很多脚本，所以具体ubifs制作并未深究，仅供参考。
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1.利用脚本将mtd-utils工具下载，生成ubinize.
它的作用是将mkfs.ubifs制作的映像转换为可以直接用nand write命令烧录的映像文件。
ubifs-jffs2.sh: (这个脚本主要是下载了mtd-utils相关软件包并压缩，编译，最后可以生成制作jffs2和ubifs映像文件的工具)#!/bin/sh
#+--------------------------------------------------------------------------------------------
#|Description: This shell script used to download lzo,zlib,mtd-utils source code
#| and cross compile it for ARM Linux, all is static cross compile.
#| Author: GuoWenxue <guowenxue@gmail.com>
#| ChangeLog:
#| 1, Initialize 1.0.0 on 2011.04.12
#+--------------------------------------------------------------------------------------------
PRJ_PATH=`pwd`
LZO="lzo-2.04"
ZLIB="zlib-1.2.5"
e2fsprogs_ver=1.42
mtd="mtd-utils-1.4.9"
function decompress_packet()
(
echo "+---------------------------------------------+"
echo "| Decompress $1 now"
echo "+---------------------------------------------+"
ftype=`file "$1"`
case "$ftype" in
"$1: Zip archive"*)
unzip "$1" ;;
"$1: gzip compressed"*)
if [ `expr "$1" : ".*.tar.*" ` ] ; then
tar -xzf $1
else
gzip -d "$1"
fi ;;
"$1: bzip2 compressed"*)
if [ `expr "$1" : ".*.tar.*" ` ] ; then
tar -xjf $1
else
bunzip2 "$1"
fi ;;
"$1: POSIX tar archive"*)
tar -xf "$1" ;;
*)
echo "$1 is unknow compress format";;
esac
)
# Download lzo source code packet
if [ ! -s $LZO.tar.gz ] ; then
wget http://www.oberhumer.com/opensource/lzo/download/$LZO.tar.gz
fi
# Decompress lzo source code packet
if [ ! -d $LZO ] ; then
decompress_packet $LZO.tar.*
fi
# Cross compile lzo
cd $LZO
if [ ! -s src/.libs/liblzo*.a ] ; then
unset LDFLAGS
./configure --enable-static --disable-shared
make
fi
cd -
echo "+----------------------------------------+"
echo "| Cross compile $ZLIB now "
echo "| Crosstool: $CROSS"
echo "+----------------------------------------+"
# Download zlib source code packet
if [ ! -s $ZLIB.tar* ] ; then
#wget http://www.zlib.net/$ZLIB.tar.gz
#wget http://www.imagemagick.org/download/delegates/$ZLIB.tar.bz2
#wget http://down1.chinaunix.net/distfiles/$ZLIB.tar.bz2
wget http://pkgs.fedoraproject.org/repo/pkgs/zlib/zlib-1.2.5.tar.bz2/be1e89810e66150f5b0327984d8625a0/$ZLIB.tar.bz2
fi
# Decompress zlib source code packet
if [ ! -d $ZLIB ] ; then
decompress_packet $ZLIB.tar.*
fi
#Cross compile zlib
cd $ZLIB
if [ ! -s libz.a ] ; then
unset LDFLAGS
./configure --static
make
fi
cd -
echo "+----------------------------------------+"
echo "| Cross compile e2fsprogsV$e2fsprogs_ver now "
echo "| Crosstool: $CROSS"
echo "+----------------------------------------+"
#e2fsprogs is for UBIFS, download e2fsprogs source code packet
if [ ! -s e2fsprogs-$e2fsprogs_ver.tar.gz ] ; then
wget http://nchc.dl.sourceforge.net/project/e2fsprogs/e2fsprogs/$e2fsprogs_ver/e2fsprogs-$e2fsprogs_ver.tar.gz
fi
# Decompress e2fsprogs source code packet
if [ ! -d e2fsprogs-$e2fsprogs_ver ] ; then
decompress_packet e2fsprogs-$e2fsprogs_ver.tar.*
fi
cd e2fsprogs-$e2fsprogs_ver
if [ ! -s lib/libuuid.a ] ; then
./configure --enable-elf-shlibs
make
fi
cd -
echo "+----------------------------------------+"
echo "| Cross compile mtd-utils now "
echo "| Crosstool: $CROSS"
echo "+----------------------------------------+"
if [ ! -s ${mtd}.tar.bz2 ] ; then
wget ftp://ftp.infradead.org/pub/mtd-utils/${mtd}.tar.bz2
fi
decompress_packet ${mtd}.tar.bz2
# download mtd-utils source code
#if [ ! -d mtd-utils* ] ; then
#git clone git://git.infradead.org/mtd-utils.git
#fi
cd ${mtd}
#Add the CROSS tool in file common.mk
line=`sed -n '/CFLAGS ?= -O2 -g/=' common.mk `
if [ ! -z $line ] ; then
sed -i -e ${line}s"|.*|CFLAGS ?= -O2 -g --static|" common.mk
fi
unset LDFLAGS
unset CFLAGS
set -x
export CFLAGS="-DWITHOUT_XATTR -I$PRJ_PATH/$ZLIB -I$PRJ_PATH/$LZO/include -I$PRJ_PATH/e2fsprogs-$e2fsprogs_ver/lib"
export ZLIBLDFLAGS=-L$PRJ_PATH/$ZLIB
export LZOLDFLAGS=-L$PRJ_PATH/$LZO/src/.libs/
export LDFLAGS="-static -L $PRJ_PATH/e2fsprogs-$e2fsprogs_ver/lib $ZLIBLDFLAGS $LZOLDFLAGS"
make
set -x
#strip nandwrite flash_erase nanddump
#sudo cp nandwrite $INST_PATH/.nandwrite
#sudo cp flash_erase $INST_PATH/.flash_erase
#sudo cp nanddump $INST_PATH/.nanddump
如果你在执行这个脚本的出现了：
/usr/bin/ld: cannot find -lc
2.制作根文件系统
#!/bin/sh
#===========================================
# Shell script body start here +
#===========================================
CPU=s3c2440
rootfs_dir=rootfs
partition_sizeM=40
image_name=ubifs-${CPU}.rootfs
if [ ! -d $rootfs_dir ] ; then
echo "Miss rootfs source code tree \"$rootfs_dir\" exit..."
exit;
fi
#Default setting by UBIFS
sub_page_size=512
vid_head_offset=512
#-m, minimum I/O unit size, it's 2K(the Page size) on K9F2G08, refer to "UBI: smallest flash I/O unit: 2048"
page_size_in_bytes=2048
#echo "Page size [$page_size_in_bytes] bytes."
#It's 64 pages per block on K9F2G08
pages_per_block=64
block_size_in_bytes=`expr $page_size_in_bytes \* $pages_per_block`
#echo "[$pages_per_block] pages per block and [$block_size_in_bytes] bytes"
#It's 2048 blocks on K9F2G08
blocks_per_device=2048
#echo "Blocks per device [$blocks_per_device]"
#-e, logical erase block size, fixed on K9F2G08, refer to u-boot information "UBI: logical eraseblock size: 129024 bytes"
# logical erase block size is physical erase block size minus 1 page for UBI
logical_pages_per_block=`expr $pages_per_block - 1`
logical_erase_block_size=`expr $page_size_in_bytes \* $logical_pages_per_block`
#echo "Logical erase block size: [$logical_erase_block_size] bytes."
# wear_level_reserved_blocks is 1% of total blcoks per device
wear_level_reserved_blocks=`expr $blocks_per_device / 100`
#echo "Reserved blocks for wear level [$wear_level_reserved_blocks]"
#The rootfs partition size in bytes
partition_size_in_bytes=`expr $partition_sizeM \* 1024 \* 1024`
partition_physical_blocks=`expr $partition_size_in_bytes / $block_size_in_bytes`
#echo "Partition size [$partition_size_in_bytes] bytes and [$partition_physical_blocks] blocks."
#Logical blocks on a partition = physical blocks on a partitiion - reserved for wear level
patition_logical_blocks=`expr $partition_physical_blocks - $wear_level_reserved_blocks`
#echo "Logical blocks in a partition [$patition_logical_blocks]"
#File-system volume = Logical blocks in a partition * Logical erase block size
fs_vol_size=`expr $patition_logical_blocks \* $logical_erase_block_size`
#echo "File-system volume [$fs_vol_size] bytes."
config_file=rootfs_ubinize.cfg
image_tmp=ubifs-${CPU}.img
echo ""
echo "Generating $image_name file by mkfs.ubifs..."
set -x
sudo /usr/local/bin/mkfs.ubifs -x lzo -m $page_size_in_bytes -e $logical_erase_block_size -c $patition_logical_blocks -r $rootfs_dir -o $image_tmp
set +x
echo
echo "Generating configuration file..."
echo "[ubifs-volume]" > $config_file
echo "mode=ubi" >> $config_file
echo "image=$image_tmp" >> $config_file
echo "vol_id=0" >> $config_file
echo "vol_size=$fs_vol_size" >> $config_file
echo "vol_type=dynamic" >> $config_file
echo "vol_name=rootfs" >> $config_file
echo "vol_flags=autoresize" >> $config_file
echo "vol_alignment=1" >> $config_file
echo
set -x
sudo /usr/local/bin/ubinize -o $image_name -m $page_size_in_bytes -p $block_size_in_bytes -s $sub_page_size -O $vid_head_offset $config_file
set +x
sudo rm -f $image_tmp $config_file
rootfs_dir=rootfs
最后会生成ubifs-s3c2440.rootfs这个文件系统的映像文件，你也可以在脚本中改名字
<span style="font-family:Microsoft YaHei;font-size:10px;">CPU=s3c2440</span>
<span style="font-family:Microsoft YaHei;font-size:10px;">image_name=ubifs-${CPU}.rootfs</span>
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3.内核配置
Device Drivers --->
<*> Memory Technology Device (MTD) support --->
<*> Enable UBI - Unsorted block images --->
--- Enable UBI - Unsorted block images
(4096) UBI wear-leveling threshold (NEW)
(1) Percentage of reserved eraseblocks for bad eraseblocks handling (NEW)
< > MTD devices emulation driver (gluebi) (NEW)
[ ] UBI debugging (NEW)
File systems --->
[*] Miscellaneous filesystems --->
<*> UBIFS file system support
[*] Extended attributes support
[*] Advanced compression options
[*] LZO compression support (NEW)
[*] ZLIB compression support (NEW)
[ ] Enable debugging support (NEW)
如果你出现了：UBI error: ubi_io_write: error -5 while writing 512 bytes to PEB 0:512, written 0 byte
Device Drivers --->
<*> Memory Technology Device (MTD) support --->
<*> NAND Device Support --->
[ ] Verify NAND page writes //不要选这个即可解决~
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4.uboot参数的修改
可以参考我的环境参数：（将MTDBLOCK6挂在为ubifs类型的根文件系统）
这里需要注意的是：
bubifs=tftp 30008000 ubifs-$cpu.rootfs;nand erase 8800000 2800000;nand write 30008000 8800000 $filesize
这里擦除一定要是整个分区的大小，这里分区是40M，所以这里的是0x2800000(20MB=0x1400000) 20MB=20*1024*1024然后再转化为16进制
不然你没擦干净，再重启的时候会出现：
error: ubi_io_read: error -1
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5.根文件系统的里面配置文件的小修改：
怕mdev自动挂载ubifs，所以改一下。
如果出现了文件系统不能挂载，则需要注意的就是uboot的参数。
一个是：
set bootargs 'console=ttyS0,115200 mem=64M ubi.mtd=6 root=ubi0:rootfs rootwait rootfstype=ubifs rw'
另一个是：
set bubifs 'tftp 30008000 rootfs.ubifs;nand erase8800000 28000000;nand write 30008000 8800000 900000'
分区写的地址一定要对
还有就是你的inittab这个脚本文件可能要修改一下，不要再挂载mtdblock6这个分区了。
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6.为啥要用这个ubifs文件系统呢？
当我们用jffs2 文件系统挂载一个分区的时候，传文件如果太大会有这种警告，而且我开发板还经常会有一些莫名其妙的问题，而且如果我文件一旦过大则会出现很多问题，现在需要做Qt项目，还有wifi 3G等项目，所以需要一个稳定的文件系统来支持：
如果是用ubifs则不会有这种情况
最后我贴一下我文件系统的mount信息，根文件系统是ubifs（mtdblock6），apps分区是jffs2（mtdblock7）类型的：
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7.修改根分区大小
a.首先修改内核中的nand分区
b.然后修改我的ubifs根文件系统的制作脚本：（只需要改这里即可）
c.最后就是重新烧内核和根文件系统，记住烧前要把前面的都擦掉。（所以你在制作这个文件系统的时候一定要想清楚你想要多大的空间）
