Jffs2

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Mounting a JFFS2 image

Using a loopback device

Make the MTD block device

mknod /dev/mtdblock0 b 31 0 

Associate the jffs2 file with a loopback device

losetup /dev/loop0 /path/to/jffs2/file/eg/Om200Y.MM-gtaNN-YYYYMMDD.rootfs.jffs2

Load the block2mtd module

modprobe block2mtd 

Tell the module which loopback device to use

echo /dev/loop0 >/sys/module/block2mtd/parameters/block2mtd

Make a mount point for the file system

 mkdir /mnt/jffs2

Mount the file system

mount -t jffs2 /dev/mtdblock0 /mnt/jffs2/


Using mtdram

An alternative way is used in the following script:

if test `id -u` != 0
then echo "Must be root"; exit 2
fi
if test $# != 2 -o ! -d $2
then echo Usage: $0 image.jffs2 directory; exit 2
fi
rmmod mtdram
modprobe mtdcore
modprobe mtdblock
modprobe mtdchar
modprobe jffs2
s=$(ls -s $1)
s=${s% *}
echo modprobe mtdram total_size=$s
modprobe mtdram total_size=$s
dd if=$1 of=/dev/mtd0
mount -t jffs2 /dev/mtdblock0 $2
Personal tools

Mounting a JFFS2 image

Using a loopback device

Make the MTD block device

mknod /dev/mtdblock0 b 31 0 

Associate the jffs2 file with a loopback device

losetup /dev/loop0 /path/to/jffs2/file/eg/Om200Y.MM-gtaNN-YYYYMMDD.rootfs.jffs2

Load the block2mtd module

modprobe block2mtd 

Tell the module which loopback device to use

echo /dev/loop0 >/sys/module/block2mtd/parameters/block2mtd

Make a mount point for the file system

 mkdir /mnt/jffs2

Mount the file system

mount -t jffs2 /dev/mtdblock0 /mnt/jffs2/


Using mtdram

An alternative way is used in the following script:

if test `id -u` != 0
then echo "Must be root"; exit 2
fi
if test $# != 2 -o ! -d $2
then echo Usage: $0 image.jffs2 directory; exit 2
fi
rmmod mtdram
modprobe mtdcore
modprobe mtdblock
modprobe mtdchar
modprobe jffs2
s=$(ls -s $1)
s=${s% *}
echo modprobe mtdram total_size=$s
modprobe mtdram total_size=$s
dd if=$1 of=/dev/mtd0
mount -t jffs2 /dev/mtdblock0 $2