Jffs2 - Revision history

Kundor: Restoring losetup method, as it is the only way to modify the jffs2 image.

2010-06-05T04:18:06Z

Restoring losetup method, as it is the only way to modify the jffs2 image.

Multi: /* Using mtdram */

2010-01-10T22:14:25Z

‎Using mtdram

Coolcat at 08:51, 2 February 2009

2009-02-02T08:51:18Z

Bram at 20:02, 28 January 2009

2009-01-28T20:02:07Z

Rainglasz: /* Mounting a JFFS2 image */ Skrip added

2009-01-28T17:33:44Z

‎Mounting a JFFS2 image: Skrip added

Nimpo: How to mount jffs2 image - worked on my fc8 machine 'out of the box'

2009-01-08T15:06:23Z

How to mount jffs2 image - worked on my fc8 machine 'out of the box'

New page

== Mounting a JFFS2 image ==

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/

@@ Line 1: / Line 1: @@
 === Using mtdram ===
-An alternative way is used in the following script:
+An alternative way is used in the following script.  Any modifications made in this mount will have no effect on the file itself.
   if test `id -u` != 0
   then echo "Must be root"; exit 2
@@ Line 19: / Line 43: @@
   mount -t jffs2 /dev/mtdblock0 "$2"
+To reset this, simply
 [[Category:Advanced End User]]

@@ Line 1: / Line 1: @@
 === Using mtdram ===
 An alternative way is used in the following script:
@@ Line 25: / Line 4: @@
   then echo "Must be root"; exit 2
   fi
-  if test $# != 2 -o ! -d $2
+  if test $# != 2 -o ! -d "$2"
   then echo Usage: $0 image.jffs2 directory; exit 2
   fi
@@ Line 33: / Line 12: @@
   modprobe mtdchar
   modprobe jffs2
-  s=$(ls -s $1)
+  s=$(ls -s "$1")
   s=${s% *}
   echo modprobe mtdram total_size=$s
   modprobe mtdram total_size=$s
-  dd if=$1 of=/dev/mtd0
+  dd if="$1" of=/dev/mtd0
-  mount -t jffs2 /dev/mtdblock0 $2
+  mount -t jffs2 /dev/mtdblock0 "$2"
 [[Category:Advanced End User]]

← Older revision		Revision as of 08:51, 2 February 2009
Line 39:		Line 39:
	dd if=$1 of=/dev/mtd0		dd if=$1 of=/dev/mtd0
	mount -t jffs2 /dev/mtdblock0 $2		mount -t jffs2 /dev/mtdblock0 $2
		+
		+
		+	[[Category:Advanced End User]]

@@ Line 1: / Line 1: @@
 == Mounting a JFFS2 image ==
+=== Using a loopback device ===
 Make the MTD block device
   mknod /dev/mtdblock0 b 31 0
@@ Line 19: / Line 19: @@
   mount -t jffs2 /dev/mtdblock0 /mnt/jffs2/
 An alternative way is used in the following script:
   if test `id -u` != 0

@@ Line 14: / Line 14: @@
 Make a mount point for the file system
- mkdir /mnt/jffs2
+  mkdir /mnt/jffs2
 Mount the file system
   mount -t jffs2 /dev/mtdblock0 /mnt/jffs2/