On Wed, Sep 17, 2008 at 12:57 AM, Rohit Sharma <[EMAIL PROTECTED]> wrote:
> On Tue, Sep 16, 2008 at 9:47 AM, ashish mahamuni <[EMAIL PROTECTED]> wrote:
>> Hello Rohit,
>>
>> I hope you are doing this for getting hand on ext2/ext3 file systems.
>> So what I'll suggest is try to read the on disk data structures and read the
>> Super Block. That will really help you to understand some part of file
>> systems instead relying on some existing functions.
>
> Ya definitely Ashish, have done my homework on this ;) .
>
> I was just searching , if there are any functions in ext2 to read the
> superblock.
>
>> I've posted one article regarding reading super block you can look at that...
>> http://bytes.com/forum/thread771405.html
>
> Manish also suggested me this method that you have implemented in your
> article, i have implemented this.
> I am looking for kernel space implementation .Can you help me on that.
> Manish has asked me to read the registered file systems and display
> the superblock from there. Any other method in kernel space??
A hacky way :-) ..... Modify any of the syscalls (write for eg.). From
the vfs inode get the superblock info. Check the magic number of
superblock. If it matches ext{2,3,4}, print the info.
Enjoy :-)
Thanks -
Manish
>>
>> Regards,
>> Ashish
>>
>>
>> --- On Mon, 15/9/08, Rohit Sharma <[EMAIL PROTECTED]> wrote:
>>
>>> From: Rohit Sharma <[EMAIL PROTECTED]>
>>> Subject: reading superblock
>>> To: "Kernelnewbies" <[email protected]>
>>> Cc: "ext4" <[EMAIL PROTECTED]>
>>> Date: Monday, 15 September, 2008, 10:11 PM
>>> I want to read ext2 superblock and display the structure.
>>>
>>> which function do i need to call for that.
>>> is it ext2_get_sb() or ext2_fill_super() or both ??
>>>
>>> this is the function prototype:
>>> static int ext2_fill_super(struct super_block *sb, void
>>> *data, int silent)
>>>
>>> what are the parameters data and silent used for.
>>>
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>
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