linux-ext4 - Re: block allocation for ext2

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Date:	Fri, 19 Dec 2008 14:51:48 +0530
From:	"Sandeep K Sinha" <sandeepksinha@...il.com>
To:	"Rohit Sharma" <imreckless@...il.com>
Cc:	"Jan Kara" <jack@...e.cz>,
	Kernelnewbies <kernelnewbies@...linux.org>,
	ext4 <linux-ext4@...r.kernel.org>
Subject: Re: block allocation for ext2_mkdir

On Fri, Dec 19, 2008 at 1:12 PM, Rohit Sharma <imreckless@...il.com> wrote:
> On Fri, Dec 19, 2008 at 4:09 AM, Jan Kara <jack@...e.cz> wrote:
>>> On Fri, Dec 19, 2008 at 12:12 AM, Rohit Sharma <imreckless@...il.com> wrote:
>>> > How does ext2 allocate blocks for directory.
>>> >
>>> > ext2_mkdir               calls            ext2_make_empty
>>> >
>>> > ext2_make_empty     calls           __ext2_write_begin
>>> >
>>> > __ ext2_write_begin   calls           block_write_begin
>>> >
>>> > my query is that how does this function allocates blocks for directories. ??
>>> >
>>>
>>> Does ext2 uses ext2_get_block to allocate blocks for both files and
>>> directories. ??
>>  Yes, exactly. Ext2 (unlike ext3 or ext4) treats directories the same
>> ways as ordinary files and thus ext2_get_block is used for block
>> allocation.
>>
>
> Can i modify this function to restrict allocation of blocks
> to a particular block group ?

Did you forget to mention "ONLY FOR YOUR PERSONAL USE, IN YOUR PRIVATE KERNEL".

>
> Like i want that my abc.txt file should be in block group 5 suppose, then
> what should i do?
>
>>                                                                Honza
>>
>> --
>> Jan Kara <jack@...e.cz>
>> SuSE CR Labs
>>
>
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>



-- 
Regards,
Sandeep.





 	
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