Re: How to print Superblock(ext2) data

[Vineet Agarwal]

Hello Mahesh,

On Wed, Oct 21, 2009 at 1:24 PM, mahesh sobale <msobale...@gmail.com> wrote:

> HI,
>
>      I am new to kernelnewbies. I am trying to print meta data in kernel
> space for superblock.
> for that i have to fire ioctl and write char device driver(This part i
> know),
>
>      But i don't know how create loop device and mount ext2 file system on
> that and then print
> superblock info.
>
>
You can create loop devices

first create a file either using dd which would act like a loop device

second find the available loop device by
losetup -f

then following this command you can create a loop device
    losetup <loop_device> <file_name>

create a file system on the loop device
mke2fs <loop_device>

mount -t ext2 <loop_device> <mountpoint>

using tune2fs or even debugfs u can get superblock info

tune2fs -l <loop_device>

or

debugfs <loop_device>

followed by stats


     Can anybody help on this.
>
> Thanx.....
> Mahesh.
>
>


-- 
Regards:
Vineet Agarwal